[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/cifs/cifssmb.c b/src/kernel/linux/v4.14/fs/cifs/cifssmb.c
new file mode 100644
index 0000000..905d0fa
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/cifs/cifssmb.c
@@ -0,0 +1,6491 @@
+/*
+ * fs/cifs/cifssmb.c
+ *
+ * Copyright (C) International Business Machines Corp., 2002,2010
+ * Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ * Contains the routines for constructing the SMB PDUs themselves
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+ /* SMB/CIFS PDU handling routines here - except for leftovers in connect.c */
+ /* These are mostly routines that operate on a pathname, or on a tree id */
+ /* (mounted volume), but there are eight handle based routines which must be */
+ /* treated slightly differently for reconnection purposes since we never */
+ /* want to reuse a stale file handle and only the caller knows the file info */
+
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/vfs.h>
+#include <linux/slab.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/task_io_accounting_ops.h>
+#include <linux/uaccess.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsacl.h"
+#include "cifsproto.h"
+#include "cifs_unicode.h"
+#include "cifs_debug.h"
+#include "fscache.h"
+
+#ifdef CONFIG_CIFS_POSIX
+static struct {
+ int index;
+ char *name;
+} protocols[] = {
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+ {LANMAN_PROT, "\2LM1.2X002"},
+ {LANMAN2_PROT, "\2LANMAN2.1"},
+#endif /* weak password hashing for legacy clients */
+ {CIFS_PROT, "\2NT LM 0.12"},
+ {POSIX_PROT, "\2POSIX 2"},
+ {BAD_PROT, "\2"}
+};
+#else
+static struct {
+ int index;
+ char *name;
+} protocols[] = {
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+ {LANMAN_PROT, "\2LM1.2X002"},
+ {LANMAN2_PROT, "\2LANMAN2.1"},
+#endif /* weak password hashing for legacy clients */
+ {CIFS_PROT, "\2NT LM 0.12"},
+ {BAD_PROT, "\2"}
+};
+#endif
+
+/* define the number of elements in the cifs dialect array */
+#ifdef CONFIG_CIFS_POSIX
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+#define CIFS_NUM_PROT 4
+#else
+#define CIFS_NUM_PROT 2
+#endif /* CIFS_WEAK_PW_HASH */
+#else /* not posix */
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+#define CIFS_NUM_PROT 3
+#else
+#define CIFS_NUM_PROT 1
+#endif /* CONFIG_CIFS_WEAK_PW_HASH */
+#endif /* CIFS_POSIX */
+
+/*
+ * Mark as invalid, all open files on tree connections since they
+ * were closed when session to server was lost.
+ */
+void
+cifs_mark_open_files_invalid(struct cifs_tcon *tcon)
+{
+ struct cifsFileInfo *open_file = NULL;
+ struct list_head *tmp;
+ struct list_head *tmp1;
+
+ /* list all files open on tree connection and mark them invalid */
+ spin_lock(&tcon->open_file_lock);
+ list_for_each_safe(tmp, tmp1, &tcon->openFileList) {
+ open_file = list_entry(tmp, struct cifsFileInfo, tlist);
+ open_file->invalidHandle = true;
+ open_file->oplock_break_cancelled = true;
+ }
+ spin_unlock(&tcon->open_file_lock);
+ /*
+ * BB Add call to invalidate_inodes(sb) for all superblocks mounted
+ * to this tcon.
+ */
+}
+
+/* reconnect the socket, tcon, and smb session if needed */
+static int
+cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command)
+{
+ int rc;
+ struct cifs_ses *ses;
+ struct TCP_Server_Info *server;
+ struct nls_table *nls_codepage;
+
+ /*
+ * SMBs NegProt, SessSetup, uLogoff do not have tcon yet so check for
+ * tcp and smb session status done differently for those three - in the
+ * calling routine
+ */
+ if (!tcon)
+ return 0;
+
+ ses = tcon->ses;
+ server = ses->server;
+
+ /*
+ * only tree disconnect, open, and write, (and ulogoff which does not
+ * have tcon) are allowed as we start force umount
+ */
+ if (tcon->tidStatus == CifsExiting) {
+ if (smb_command != SMB_COM_WRITE_ANDX &&
+ smb_command != SMB_COM_OPEN_ANDX &&
+ smb_command != SMB_COM_TREE_DISCONNECT) {
+ cifs_dbg(FYI, "can not send cmd %d while umounting\n",
+ smb_command);
+ return -ENODEV;
+ }
+ }
+
+ /*
+ * Give demultiplex thread up to 10 seconds to reconnect, should be
+ * greater than cifs socket timeout which is 7 seconds
+ */
+ while (server->tcpStatus == CifsNeedReconnect) {
+ rc = wait_event_interruptible_timeout(server->response_q,
+ (server->tcpStatus != CifsNeedReconnect),
+ 10 * HZ);
+ if (rc < 0) {
+ cifs_dbg(FYI, "%s: aborting reconnect due to a received"
+ " signal by the process\n", __func__);
+ return -ERESTARTSYS;
+ }
+
+ /* are we still trying to reconnect? */
+ if (server->tcpStatus != CifsNeedReconnect)
+ break;
+
+ /*
+ * on "soft" mounts we wait once. Hard mounts keep
+ * retrying until process is killed or server comes
+ * back on-line
+ */
+ if (!tcon->retry) {
+ cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
+ return -EHOSTDOWN;
+ }
+ }
+
+ if (!ses->need_reconnect && !tcon->need_reconnect)
+ return 0;
+
+ nls_codepage = load_nls_default();
+
+ /*
+ * need to prevent multiple threads trying to simultaneously
+ * reconnect the same SMB session
+ */
+ mutex_lock(&ses->session_mutex);
+
+ /*
+ * Recheck after acquire mutex. If another thread is negotiating
+ * and the server never sends an answer the socket will be closed
+ * and tcpStatus set to reconnect.
+ */
+ if (server->tcpStatus == CifsNeedReconnect) {
+ rc = -EHOSTDOWN;
+ mutex_unlock(&ses->session_mutex);
+ goto out;
+ }
+
+ rc = cifs_negotiate_protocol(0, ses);
+ if (rc == 0 && ses->need_reconnect)
+ rc = cifs_setup_session(0, ses, nls_codepage);
+
+ /* do we need to reconnect tcon? */
+ if (rc || !tcon->need_reconnect) {
+ mutex_unlock(&ses->session_mutex);
+ goto out;
+ }
+
+ cifs_mark_open_files_invalid(tcon);
+ rc = CIFSTCon(0, ses, tcon->treeName, tcon, nls_codepage);
+ mutex_unlock(&ses->session_mutex);
+ cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
+
+ if (rc)
+ goto out;
+
+ atomic_inc(&tconInfoReconnectCount);
+
+ /* tell server Unix caps we support */
+ if (ses->capabilities & CAP_UNIX)
+ reset_cifs_unix_caps(0, tcon, NULL, NULL);
+
+ /*
+ * Removed call to reopen open files here. It is safer (and faster) to
+ * reopen files one at a time as needed in read and write.
+ *
+ * FIXME: what about file locks? don't we need to reclaim them ASAP?
+ */
+
+out:
+ /*
+ * Check if handle based operation so we know whether we can continue
+ * or not without returning to caller to reset file handle
+ */
+ switch (smb_command) {
+ case SMB_COM_READ_ANDX:
+ case SMB_COM_WRITE_ANDX:
+ case SMB_COM_CLOSE:
+ case SMB_COM_FIND_CLOSE2:
+ case SMB_COM_LOCKING_ANDX:
+ rc = -EAGAIN;
+ }
+
+ unload_nls(nls_codepage);
+ return rc;
+}
+
+/* Allocate and return pointer to an SMB request buffer, and set basic
+ SMB information in the SMB header. If the return code is zero, this
+ function must have filled in request_buf pointer */
+static int
+small_smb_init(int smb_command, int wct, struct cifs_tcon *tcon,
+ void **request_buf)
+{
+ int rc;
+
+ rc = cifs_reconnect_tcon(tcon, smb_command);
+ if (rc)
+ return rc;
+
+ *request_buf = cifs_small_buf_get();
+ if (*request_buf == NULL) {
+ /* BB should we add a retry in here if not a writepage? */
+ return -ENOMEM;
+ }
+
+ header_assemble((struct smb_hdr *) *request_buf, smb_command,
+ tcon, wct);
+
+ if (tcon != NULL)
+ cifs_stats_inc(&tcon->num_smbs_sent);
+
+ return 0;
+}
+
+int
+small_smb_init_no_tc(const int smb_command, const int wct,
+ struct cifs_ses *ses, void **request_buf)
+{
+ int rc;
+ struct smb_hdr *buffer;
+
+ rc = small_smb_init(smb_command, wct, NULL, request_buf);
+ if (rc)
+ return rc;
+
+ buffer = (struct smb_hdr *)*request_buf;
+ buffer->Mid = get_next_mid(ses->server);
+ if (ses->capabilities & CAP_UNICODE)
+ buffer->Flags2 |= SMBFLG2_UNICODE;
+ if (ses->capabilities & CAP_STATUS32)
+ buffer->Flags2 |= SMBFLG2_ERR_STATUS;
+
+ /* uid, tid can stay at zero as set in header assemble */
+
+ /* BB add support for turning on the signing when
+ this function is used after 1st of session setup requests */
+
+ return rc;
+}
+
+/* If the return code is zero, this function must fill in request_buf pointer */
+static int
+__smb_init(int smb_command, int wct, struct cifs_tcon *tcon,
+ void **request_buf, void **response_buf)
+{
+ *request_buf = cifs_buf_get();
+ if (*request_buf == NULL) {
+ /* BB should we add a retry in here if not a writepage? */
+ return -ENOMEM;
+ }
+ /* Although the original thought was we needed the response buf for */
+ /* potential retries of smb operations it turns out we can determine */
+ /* from the mid flags when the request buffer can be resent without */
+ /* having to use a second distinct buffer for the response */
+ if (response_buf)
+ *response_buf = *request_buf;
+
+ header_assemble((struct smb_hdr *) *request_buf, smb_command, tcon,
+ wct);
+
+ if (tcon != NULL)
+ cifs_stats_inc(&tcon->num_smbs_sent);
+
+ return 0;
+}
+
+/* If the return code is zero, this function must fill in request_buf pointer */
+static int
+smb_init(int smb_command, int wct, struct cifs_tcon *tcon,
+ void **request_buf, void **response_buf)
+{
+ int rc;
+
+ rc = cifs_reconnect_tcon(tcon, smb_command);
+ if (rc)
+ return rc;
+
+ return __smb_init(smb_command, wct, tcon, request_buf, response_buf);
+}
+
+static int
+smb_init_no_reconnect(int smb_command, int wct, struct cifs_tcon *tcon,
+ void **request_buf, void **response_buf)
+{
+ if (tcon->ses->need_reconnect || tcon->need_reconnect)
+ return -EHOSTDOWN;
+
+ return __smb_init(smb_command, wct, tcon, request_buf, response_buf);
+}
+
+static int validate_t2(struct smb_t2_rsp *pSMB)
+{
+ unsigned int total_size;
+
+ /* check for plausible wct */
+ if (pSMB->hdr.WordCount < 10)
+ goto vt2_err;
+
+ /* check for parm and data offset going beyond end of smb */
+ if (get_unaligned_le16(&pSMB->t2_rsp.ParameterOffset) > 1024 ||
+ get_unaligned_le16(&pSMB->t2_rsp.DataOffset) > 1024)
+ goto vt2_err;
+
+ total_size = get_unaligned_le16(&pSMB->t2_rsp.ParameterCount);
+ if (total_size >= 512)
+ goto vt2_err;
+
+ /* check that bcc is at least as big as parms + data, and that it is
+ * less than negotiated smb buffer
+ */
+ total_size += get_unaligned_le16(&pSMB->t2_rsp.DataCount);
+ if (total_size > get_bcc(&pSMB->hdr) ||
+ total_size >= CIFSMaxBufSize + MAX_CIFS_HDR_SIZE)
+ goto vt2_err;
+
+ return 0;
+vt2_err:
+ cifs_dump_mem("Invalid transact2 SMB: ", (char *)pSMB,
+ sizeof(struct smb_t2_rsp) + 16);
+ return -EINVAL;
+}
+
+static int
+decode_ext_sec_blob(struct cifs_ses *ses, NEGOTIATE_RSP *pSMBr)
+{
+ int rc = 0;
+ u16 count;
+ char *guid = pSMBr->u.extended_response.GUID;
+ struct TCP_Server_Info *server = ses->server;
+
+ count = get_bcc(&pSMBr->hdr);
+ if (count < SMB1_CLIENT_GUID_SIZE)
+ return -EIO;
+
+ spin_lock(&cifs_tcp_ses_lock);
+ if (server->srv_count > 1) {
+ spin_unlock(&cifs_tcp_ses_lock);
+ if (memcmp(server->server_GUID, guid, SMB1_CLIENT_GUID_SIZE) != 0) {
+ cifs_dbg(FYI, "server UID changed\n");
+ memcpy(server->server_GUID, guid, SMB1_CLIENT_GUID_SIZE);
+ }
+ } else {
+ spin_unlock(&cifs_tcp_ses_lock);
+ memcpy(server->server_GUID, guid, SMB1_CLIENT_GUID_SIZE);
+ }
+
+ if (count == SMB1_CLIENT_GUID_SIZE) {
+ server->sec_ntlmssp = true;
+ } else {
+ count -= SMB1_CLIENT_GUID_SIZE;
+ rc = decode_negTokenInit(
+ pSMBr->u.extended_response.SecurityBlob, count, server);
+ if (rc != 1)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int
+cifs_enable_signing(struct TCP_Server_Info *server, bool mnt_sign_required)
+{
+ bool srv_sign_required = server->sec_mode & server->vals->signing_required;
+ bool srv_sign_enabled = server->sec_mode & server->vals->signing_enabled;
+ bool mnt_sign_enabled = global_secflags & CIFSSEC_MAY_SIGN;
+
+ /*
+ * Is signing required by mnt options? If not then check
+ * global_secflags to see if it is there.
+ */
+ if (!mnt_sign_required)
+ mnt_sign_required = ((global_secflags & CIFSSEC_MUST_SIGN) ==
+ CIFSSEC_MUST_SIGN);
+
+ /*
+ * If signing is required then it's automatically enabled too,
+ * otherwise, check to see if the secflags allow it.
+ */
+ mnt_sign_enabled = mnt_sign_required ? mnt_sign_required :
+ (global_secflags & CIFSSEC_MAY_SIGN);
+
+ /* If server requires signing, does client allow it? */
+ if (srv_sign_required) {
+ if (!mnt_sign_enabled) {
+ cifs_dbg(VFS, "Server requires signing, but it's disabled in SecurityFlags!");
+ return -ENOTSUPP;
+ }
+ server->sign = true;
+ }
+
+ /* If client requires signing, does server allow it? */
+ if (mnt_sign_required) {
+ if (!srv_sign_enabled) {
+ cifs_dbg(VFS, "Server does not support signing!");
+ return -ENOTSUPP;
+ }
+ server->sign = true;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+static int
+decode_lanman_negprot_rsp(struct TCP_Server_Info *server, NEGOTIATE_RSP *pSMBr)
+{
+ __s16 tmp;
+ struct lanman_neg_rsp *rsp = (struct lanman_neg_rsp *)pSMBr;
+
+ if (server->dialect != LANMAN_PROT && server->dialect != LANMAN2_PROT)
+ return -EOPNOTSUPP;
+
+ server->sec_mode = le16_to_cpu(rsp->SecurityMode);
+ server->maxReq = min_t(unsigned int,
+ le16_to_cpu(rsp->MaxMpxCount),
+ cifs_max_pending);
+ set_credits(server, server->maxReq);
+ server->maxBuf = le16_to_cpu(rsp->MaxBufSize);
+ /* even though we do not use raw we might as well set this
+ accurately, in case we ever find a need for it */
+ if ((le16_to_cpu(rsp->RawMode) & RAW_ENABLE) == RAW_ENABLE) {
+ server->max_rw = 0xFF00;
+ server->capabilities = CAP_MPX_MODE | CAP_RAW_MODE;
+ } else {
+ server->max_rw = 0;/* do not need to use raw anyway */
+ server->capabilities = CAP_MPX_MODE;
+ }
+ tmp = (__s16)le16_to_cpu(rsp->ServerTimeZone);
+ if (tmp == -1) {
+ /* OS/2 often does not set timezone therefore
+ * we must use server time to calc time zone.
+ * Could deviate slightly from the right zone.
+ * Smallest defined timezone difference is 15 minutes
+ * (i.e. Nepal). Rounding up/down is done to match
+ * this requirement.
+ */
+ int val, seconds, remain, result;
+ struct timespec ts;
+ unsigned long utc = ktime_get_real_seconds();
+ ts = cnvrtDosUnixTm(rsp->SrvTime.Date,
+ rsp->SrvTime.Time, 0);
+ cifs_dbg(FYI, "SrvTime %d sec since 1970 (utc: %d) diff: %d\n",
+ (int)ts.tv_sec, (int)utc,
+ (int)(utc - ts.tv_sec));
+ val = (int)(utc - ts.tv_sec);
+ seconds = abs(val);
+ result = (seconds / MIN_TZ_ADJ) * MIN_TZ_ADJ;
+ remain = seconds % MIN_TZ_ADJ;
+ if (remain >= (MIN_TZ_ADJ / 2))
+ result += MIN_TZ_ADJ;
+ if (val < 0)
+ result = -result;
+ server->timeAdj = result;
+ } else {
+ server->timeAdj = (int)tmp;
+ server->timeAdj *= 60; /* also in seconds */
+ }
+ cifs_dbg(FYI, "server->timeAdj: %d seconds\n", server->timeAdj);
+
+
+ /* BB get server time for time conversions and add
+ code to use it and timezone since this is not UTC */
+
+ if (rsp->EncryptionKeyLength ==
+ cpu_to_le16(CIFS_CRYPTO_KEY_SIZE)) {
+ memcpy(server->cryptkey, rsp->EncryptionKey,
+ CIFS_CRYPTO_KEY_SIZE);
+ } else if (server->sec_mode & SECMODE_PW_ENCRYPT) {
+ return -EIO; /* need cryptkey unless plain text */
+ }
+
+ cifs_dbg(FYI, "LANMAN negotiated\n");
+ return 0;
+}
+#else
+static inline int
+decode_lanman_negprot_rsp(struct TCP_Server_Info *server, NEGOTIATE_RSP *pSMBr)
+{
+ cifs_dbg(VFS, "mount failed, cifs module not built with CIFS_WEAK_PW_HASH support\n");
+ return -EOPNOTSUPP;
+}
+#endif
+
+static bool
+should_set_ext_sec_flag(enum securityEnum sectype)
+{
+ switch (sectype) {
+ case RawNTLMSSP:
+ case Kerberos:
+ return true;
+ case Unspecified:
+ if (global_secflags &
+ (CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP))
+ return true;
+ /* Fallthrough */
+ default:
+ return false;
+ }
+}
+
+int
+CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
+{
+ NEGOTIATE_REQ *pSMB;
+ NEGOTIATE_RSP *pSMBr;
+ int rc = 0;
+ int bytes_returned;
+ int i;
+ struct TCP_Server_Info *server = ses->server;
+ u16 count;
+
+ if (!server) {
+ WARN(1, "%s: server is NULL!\n", __func__);
+ return -EIO;
+ }
+
+ rc = smb_init(SMB_COM_NEGOTIATE, 0, NULL /* no tcon yet */ ,
+ (void **) &pSMB, (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->hdr.Mid = get_next_mid(server);
+ pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
+
+ if (should_set_ext_sec_flag(ses->sectype)) {
+ cifs_dbg(FYI, "Requesting extended security.");
+ pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
+ }
+
+ count = 0;
+ /*
+ * We know that all the name entries in the protocols array
+ * are short (< 16 bytes anyway) and are NUL terminated.
+ */
+ for (i = 0; i < CIFS_NUM_PROT; i++) {
+ size_t len = strlen(protocols[i].name) + 1;
+
+ memcpy(pSMB->DialectsArray+count, protocols[i].name, len);
+ count += len;
+ }
+ inc_rfc1001_len(pSMB, count);
+ pSMB->ByteCount = cpu_to_le16(count);
+
+ rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc != 0)
+ goto neg_err_exit;
+
+ server->dialect = le16_to_cpu(pSMBr->DialectIndex);
+ cifs_dbg(FYI, "Dialect: %d\n", server->dialect);
+ /* Check wct = 1 error case */
+ if ((pSMBr->hdr.WordCount < 13) || (server->dialect == BAD_PROT)) {
+ /* core returns wct = 1, but we do not ask for core - otherwise
+ small wct just comes when dialect index is -1 indicating we
+ could not negotiate a common dialect */
+ rc = -EOPNOTSUPP;
+ goto neg_err_exit;
+ } else if (pSMBr->hdr.WordCount == 13) {
+ server->negflavor = CIFS_NEGFLAVOR_LANMAN;
+ rc = decode_lanman_negprot_rsp(server, pSMBr);
+ goto signing_check;
+ } else if (pSMBr->hdr.WordCount != 17) {
+ /* unknown wct */
+ rc = -EOPNOTSUPP;
+ goto neg_err_exit;
+ }
+ /* else wct == 17, NTLM or better */
+
+ server->sec_mode = pSMBr->SecurityMode;
+ if ((server->sec_mode & SECMODE_USER) == 0)
+ cifs_dbg(FYI, "share mode security\n");
+
+ /* one byte, so no need to convert this or EncryptionKeyLen from
+ little endian */
+ server->maxReq = min_t(unsigned int, le16_to_cpu(pSMBr->MaxMpxCount),
+ cifs_max_pending);
+ set_credits(server, server->maxReq);
+ /* probably no need to store and check maxvcs */
+ server->maxBuf = le32_to_cpu(pSMBr->MaxBufferSize);
+ server->max_rw = le32_to_cpu(pSMBr->MaxRawSize);
+ cifs_dbg(NOISY, "Max buf = %d\n", ses->server->maxBuf);
+ server->capabilities = le32_to_cpu(pSMBr->Capabilities);
+ server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone);
+ server->timeAdj *= 60;
+
+ if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
+ server->negflavor = CIFS_NEGFLAVOR_UNENCAP;
+ memcpy(ses->server->cryptkey, pSMBr->u.EncryptionKey,
+ CIFS_CRYPTO_KEY_SIZE);
+ } else if (pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC ||
+ server->capabilities & CAP_EXTENDED_SECURITY) {
+ server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
+ rc = decode_ext_sec_blob(ses, pSMBr);
+ } else if (server->sec_mode & SECMODE_PW_ENCRYPT) {
+ rc = -EIO; /* no crypt key only if plain text pwd */
+ } else {
+ server->negflavor = CIFS_NEGFLAVOR_UNENCAP;
+ server->capabilities &= ~CAP_EXTENDED_SECURITY;
+ }
+
+signing_check:
+ if (!rc)
+ rc = cifs_enable_signing(server, ses->sign);
+neg_err_exit:
+ cifs_buf_release(pSMB);
+
+ cifs_dbg(FYI, "negprot rc %d\n", rc);
+ return rc;
+}
+
+int
+CIFSSMBTDis(const unsigned int xid, struct cifs_tcon *tcon)
+{
+ struct smb_hdr *smb_buffer;
+ int rc = 0;
+
+ cifs_dbg(FYI, "In tree disconnect\n");
+
+ /* BB: do we need to check this? These should never be NULL. */
+ if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
+ return -EIO;
+
+ /*
+ * No need to return error on this operation if tid invalidated and
+ * closed on server already e.g. due to tcp session crashing. Also,
+ * the tcon is no longer on the list, so no need to take lock before
+ * checking this.
+ */
+ if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
+ return 0;
+
+ rc = small_smb_init(SMB_COM_TREE_DISCONNECT, 0, tcon,
+ (void **)&smb_buffer);
+ if (rc)
+ return rc;
+
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *)smb_buffer, 0);
+ cifs_small_buf_release(smb_buffer);
+ if (rc)
+ cifs_dbg(FYI, "Tree disconnect failed %d\n", rc);
+
+ /* No need to return error on this operation if tid invalidated and
+ closed on server already e.g. due to tcp session crashing */
+ if (rc == -EAGAIN)
+ rc = 0;
+
+ return rc;
+}
+
+/*
+ * This is a no-op for now. We're not really interested in the reply, but
+ * rather in the fact that the server sent one and that server->lstrp
+ * gets updated.
+ *
+ * FIXME: maybe we should consider checking that the reply matches request?
+ */
+static void
+cifs_echo_callback(struct mid_q_entry *mid)
+{
+ struct TCP_Server_Info *server = mid->callback_data;
+
+ DeleteMidQEntry(mid);
+ add_credits(server, 1, CIFS_ECHO_OP);
+}
+
+int
+CIFSSMBEcho(struct TCP_Server_Info *server)
+{
+ ECHO_REQ *smb;
+ int rc = 0;
+ struct kvec iov[2];
+ struct smb_rqst rqst = { .rq_iov = iov,
+ .rq_nvec = 2 };
+
+ cifs_dbg(FYI, "In echo request\n");
+
+ rc = small_smb_init(SMB_COM_ECHO, 0, NULL, (void **)&smb);
+ if (rc)
+ return rc;
+
+ if (server->capabilities & CAP_UNICODE)
+ smb->hdr.Flags2 |= SMBFLG2_UNICODE;
+
+ /* set up echo request */
+ smb->hdr.Tid = 0xffff;
+ smb->hdr.WordCount = 1;
+ put_unaligned_le16(1, &smb->EchoCount);
+ put_bcc(1, &smb->hdr);
+ smb->Data[0] = 'a';
+ inc_rfc1001_len(smb, 3);
+
+ iov[0].iov_len = 4;
+ iov[0].iov_base = smb;
+ iov[1].iov_len = get_rfc1002_length(smb);
+ iov[1].iov_base = (char *)smb + 4;
+
+ rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback, NULL,
+ server, CIFS_ASYNC_OP | CIFS_ECHO_OP);
+ if (rc)
+ cifs_dbg(FYI, "Echo request failed: %d\n", rc);
+
+ cifs_small_buf_release(smb);
+
+ return rc;
+}
+
+int
+CIFSSMBLogoff(const unsigned int xid, struct cifs_ses *ses)
+{
+ LOGOFF_ANDX_REQ *pSMB;
+ int rc = 0;
+
+ cifs_dbg(FYI, "In SMBLogoff for session disconnect\n");
+
+ /*
+ * BB: do we need to check validity of ses and server? They should
+ * always be valid since we have an active reference. If not, that
+ * should probably be a BUG()
+ */
+ if (!ses || !ses->server)
+ return -EIO;
+
+ mutex_lock(&ses->session_mutex);
+ if (ses->need_reconnect)
+ goto session_already_dead; /* no need to send SMBlogoff if uid
+ already closed due to reconnect */
+ rc = small_smb_init(SMB_COM_LOGOFF_ANDX, 2, NULL, (void **)&pSMB);
+ if (rc) {
+ mutex_unlock(&ses->session_mutex);
+ return rc;
+ }
+
+ pSMB->hdr.Mid = get_next_mid(ses->server);
+
+ if (ses->server->sign)
+ pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+
+ pSMB->hdr.Uid = ses->Suid;
+
+ pSMB->AndXCommand = 0xFF;
+ rc = SendReceiveNoRsp(xid, ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
+session_already_dead:
+ mutex_unlock(&ses->session_mutex);
+
+ /* if session dead then we do not need to do ulogoff,
+ since server closed smb session, no sense reporting
+ error */
+ if (rc == -EAGAIN)
+ rc = 0;
+ return rc;
+}
+
+int
+CIFSPOSIXDelFile(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *fileName, __u16 type,
+ const struct nls_table *nls_codepage, int remap)
+{
+ TRANSACTION2_SPI_REQ *pSMB = NULL;
+ TRANSACTION2_SPI_RSP *pSMBr = NULL;
+ struct unlink_psx_rq *pRqD;
+ int name_len;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, param_offset, offset, byte_count;
+
+ cifs_dbg(FYI, "In POSIX delete\n");
+PsxDelete:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName,
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB add path length overrun check */
+ name_len = strnlen(fileName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, fileName, name_len);
+ }
+
+ params = 6 + name_len;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ pSMB->MaxDataCount = 0; /* BB double check this with jra */
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_spi_req,
+ InformationLevel) - 4;
+ offset = param_offset + params;
+
+ /* Setup pointer to Request Data (inode type) */
+ pRqD = (struct unlink_psx_rq *)(((char *)&pSMB->hdr.Protocol) + offset);
+ pRqD->type = cpu_to_le16(type);
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+ byte_count = 3 /* pad */ + params + sizeof(struct unlink_psx_rq);
+
+ pSMB->DataCount = cpu_to_le16(sizeof(struct unlink_psx_rq));
+ pSMB->TotalDataCount = cpu_to_le16(sizeof(struct unlink_psx_rq));
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_POSIX_UNLINK);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc)
+ cifs_dbg(FYI, "Posix delete returned %d\n", rc);
+ cifs_buf_release(pSMB);
+
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_deletes);
+
+ if (rc == -EAGAIN)
+ goto PsxDelete;
+
+ return rc;
+}
+
+int
+CIFSSMBDelFile(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
+ struct cifs_sb_info *cifs_sb)
+{
+ DELETE_FILE_REQ *pSMB = NULL;
+ DELETE_FILE_RSP *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned;
+ int name_len;
+ int remap = cifs_remap(cifs_sb);
+
+DelFileRetry:
+ rc = smb_init(SMB_COM_DELETE, 1, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len = cifsConvertToUTF16((__le16 *) pSMB->fileName, name,
+ PATH_MAX, cifs_sb->local_nls,
+ remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve check for buffer overruns BB */
+ name_len = strnlen(name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->fileName, name, name_len);
+ }
+ pSMB->SearchAttributes =
+ cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM);
+ pSMB->BufferFormat = 0x04;
+ inc_rfc1001_len(pSMB, name_len + 1);
+ pSMB->ByteCount = cpu_to_le16(name_len + 1);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_deletes);
+ if (rc)
+ cifs_dbg(FYI, "Error in RMFile = %d\n", rc);
+
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto DelFileRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBRmDir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
+ struct cifs_sb_info *cifs_sb)
+{
+ DELETE_DIRECTORY_REQ *pSMB = NULL;
+ DELETE_DIRECTORY_RSP *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned;
+ int name_len;
+ int remap = cifs_remap(cifs_sb);
+
+ cifs_dbg(FYI, "In CIFSSMBRmDir\n");
+RmDirRetry:
+ rc = smb_init(SMB_COM_DELETE_DIRECTORY, 0, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len = cifsConvertToUTF16((__le16 *) pSMB->DirName, name,
+ PATH_MAX, cifs_sb->local_nls,
+ remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve check for buffer overruns BB */
+ name_len = strnlen(name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->DirName, name, name_len);
+ }
+
+ pSMB->BufferFormat = 0x04;
+ inc_rfc1001_len(pSMB, name_len + 1);
+ pSMB->ByteCount = cpu_to_le16(name_len + 1);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_rmdirs);
+ if (rc)
+ cifs_dbg(FYI, "Error in RMDir = %d\n", rc);
+
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto RmDirRetry;
+ return rc;
+}
+
+int
+CIFSSMBMkDir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
+ struct cifs_sb_info *cifs_sb)
+{
+ int rc = 0;
+ CREATE_DIRECTORY_REQ *pSMB = NULL;
+ CREATE_DIRECTORY_RSP *pSMBr = NULL;
+ int bytes_returned;
+ int name_len;
+ int remap = cifs_remap(cifs_sb);
+
+ cifs_dbg(FYI, "In CIFSSMBMkDir\n");
+MkDirRetry:
+ rc = smb_init(SMB_COM_CREATE_DIRECTORY, 0, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len = cifsConvertToUTF16((__le16 *) pSMB->DirName, name,
+ PATH_MAX, cifs_sb->local_nls,
+ remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve check for buffer overruns BB */
+ name_len = strnlen(name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->DirName, name, name_len);
+ }
+
+ pSMB->BufferFormat = 0x04;
+ inc_rfc1001_len(pSMB, name_len + 1);
+ pSMB->ByteCount = cpu_to_le16(name_len + 1);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_mkdirs);
+ if (rc)
+ cifs_dbg(FYI, "Error in Mkdir = %d\n", rc);
+
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto MkDirRetry;
+ return rc;
+}
+
+int
+CIFSPOSIXCreate(const unsigned int xid, struct cifs_tcon *tcon,
+ __u32 posix_flags, __u64 mode, __u16 *netfid,
+ FILE_UNIX_BASIC_INFO *pRetData, __u32 *pOplock,
+ const char *name, const struct nls_table *nls_codepage,
+ int remap)
+{
+ TRANSACTION2_SPI_REQ *pSMB = NULL;
+ TRANSACTION2_SPI_RSP *pSMBr = NULL;
+ int name_len;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, param_offset, offset, byte_count, count;
+ OPEN_PSX_REQ *pdata;
+ OPEN_PSX_RSP *psx_rsp;
+
+ cifs_dbg(FYI, "In POSIX Create\n");
+PsxCreat:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, name,
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, name, name_len);
+ }
+
+ params = 6 + name_len;
+ count = sizeof(OPEN_PSX_REQ);
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ pSMB->MaxDataCount = cpu_to_le16(1000); /* large enough */
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_spi_req,
+ InformationLevel) - 4;
+ offset = param_offset + params;
+ pdata = (OPEN_PSX_REQ *)(((char *)&pSMB->hdr.Protocol) + offset);
+ pdata->Level = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
+ pdata->Permissions = cpu_to_le64(mode);
+ pdata->PosixOpenFlags = cpu_to_le32(posix_flags);
+ pdata->OpenFlags = cpu_to_le32(*pOplock);
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+ byte_count = 3 /* pad */ + params + count;
+
+ pSMB->DataCount = cpu_to_le16(count);
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_POSIX_OPEN);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Posix create returned %d\n", rc);
+ goto psx_create_err;
+ }
+
+ cifs_dbg(FYI, "copying inode info\n");
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || get_bcc(&pSMBr->hdr) < sizeof(OPEN_PSX_RSP)) {
+ rc = -EIO; /* bad smb */
+ goto psx_create_err;
+ }
+
+ /* copy return information to pRetData */
+ psx_rsp = (OPEN_PSX_RSP *)((char *) &pSMBr->hdr.Protocol
+ + le16_to_cpu(pSMBr->t2.DataOffset));
+
+ *pOplock = le16_to_cpu(psx_rsp->OplockFlags);
+ if (netfid)
+ *netfid = psx_rsp->Fid; /* cifs fid stays in le */
+ /* Let caller know file was created so we can set the mode. */
+ /* Do we care about the CreateAction in any other cases? */
+ if (cpu_to_le32(FILE_CREATE) == psx_rsp->CreateAction)
+ *pOplock |= CIFS_CREATE_ACTION;
+ /* check to make sure response data is there */
+ if (psx_rsp->ReturnedLevel != cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC)) {
+ pRetData->Type = cpu_to_le32(-1); /* unknown */
+ cifs_dbg(NOISY, "unknown type\n");
+ } else {
+ if (get_bcc(&pSMBr->hdr) < sizeof(OPEN_PSX_RSP)
+ + sizeof(FILE_UNIX_BASIC_INFO)) {
+ cifs_dbg(VFS, "Open response data too small\n");
+ pRetData->Type = cpu_to_le32(-1);
+ goto psx_create_err;
+ }
+ memcpy((char *) pRetData,
+ (char *)psx_rsp + sizeof(OPEN_PSX_RSP),
+ sizeof(FILE_UNIX_BASIC_INFO));
+ }
+
+psx_create_err:
+ cifs_buf_release(pSMB);
+
+ if (posix_flags & SMB_O_DIRECTORY)
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_posixmkdirs);
+ else
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_posixopens);
+
+ if (rc == -EAGAIN)
+ goto PsxCreat;
+
+ return rc;
+}
+
+static __u16 convert_disposition(int disposition)
+{
+ __u16 ofun = 0;
+
+ switch (disposition) {
+ case FILE_SUPERSEDE:
+ ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC;
+ break;
+ case FILE_OPEN:
+ ofun = SMBOPEN_OAPPEND;
+ break;
+ case FILE_CREATE:
+ ofun = SMBOPEN_OCREATE;
+ break;
+ case FILE_OPEN_IF:
+ ofun = SMBOPEN_OCREATE | SMBOPEN_OAPPEND;
+ break;
+ case FILE_OVERWRITE:
+ ofun = SMBOPEN_OTRUNC;
+ break;
+ case FILE_OVERWRITE_IF:
+ ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC;
+ break;
+ default:
+ cifs_dbg(FYI, "unknown disposition %d\n", disposition);
+ ofun = SMBOPEN_OAPPEND; /* regular open */
+ }
+ return ofun;
+}
+
+static int
+access_flags_to_smbopen_mode(const int access_flags)
+{
+ int masked_flags = access_flags & (GENERIC_READ | GENERIC_WRITE);
+
+ if (masked_flags == GENERIC_READ)
+ return SMBOPEN_READ;
+ else if (masked_flags == GENERIC_WRITE)
+ return SMBOPEN_WRITE;
+
+ /* just go for read/write */
+ return SMBOPEN_READWRITE;
+}
+
+int
+SMBLegacyOpen(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *fileName, const int openDisposition,
+ const int access_flags, const int create_options, __u16 *netfid,
+ int *pOplock, FILE_ALL_INFO *pfile_info,
+ const struct nls_table *nls_codepage, int remap)
+{
+ int rc = -EACCES;
+ OPENX_REQ *pSMB = NULL;
+ OPENX_RSP *pSMBr = NULL;
+ int bytes_returned;
+ int name_len;
+ __u16 count;
+
+OldOpenRetry:
+ rc = smb_init(SMB_COM_OPEN_ANDX, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->AndXCommand = 0xFF; /* none */
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ count = 1; /* account for one byte pad to word boundary */
+ name_len =
+ cifsConvertToUTF16((__le16 *) (pSMB->fileName + 1),
+ fileName, PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve check for buffer overruns BB */
+ count = 0; /* no pad */
+ name_len = strnlen(fileName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->fileName, fileName, name_len);
+ }
+ if (*pOplock & REQ_OPLOCK)
+ pSMB->OpenFlags = cpu_to_le16(REQ_OPLOCK);
+ else if (*pOplock & REQ_BATCHOPLOCK)
+ pSMB->OpenFlags = cpu_to_le16(REQ_BATCHOPLOCK);
+
+ pSMB->OpenFlags |= cpu_to_le16(REQ_MORE_INFO);
+ pSMB->Mode = cpu_to_le16(access_flags_to_smbopen_mode(access_flags));
+ pSMB->Mode |= cpu_to_le16(0x40); /* deny none */
+ /* set file as system file if special file such
+ as fifo and server expecting SFU style and
+ no Unix extensions */
+
+ if (create_options & CREATE_OPTION_SPECIAL)
+ pSMB->FileAttributes = cpu_to_le16(ATTR_SYSTEM);
+ else /* BB FIXME BB */
+ pSMB->FileAttributes = cpu_to_le16(0/*ATTR_NORMAL*/);
+
+ if (create_options & CREATE_OPTION_READONLY)
+ pSMB->FileAttributes |= cpu_to_le16(ATTR_READONLY);
+
+ /* BB FIXME BB */
+/* pSMB->CreateOptions = cpu_to_le32(create_options &
+ CREATE_OPTIONS_MASK); */
+ /* BB FIXME END BB */
+
+ pSMB->Sattr = cpu_to_le16(ATTR_HIDDEN | ATTR_SYSTEM | ATTR_DIRECTORY);
+ pSMB->OpenFunction = cpu_to_le16(convert_disposition(openDisposition));
+ count += name_len;
+ inc_rfc1001_len(pSMB, count);
+
+ pSMB->ByteCount = cpu_to_le16(count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *)pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_opens);
+ if (rc) {
+ cifs_dbg(FYI, "Error in Open = %d\n", rc);
+ } else {
+ /* BB verify if wct == 15 */
+
+/* *pOplock = pSMBr->OplockLevel; */ /* BB take from action field*/
+
+ *netfid = pSMBr->Fid; /* cifs fid stays in le */
+ /* Let caller know file was created so we can set the mode. */
+ /* Do we care about the CreateAction in any other cases? */
+ /* BB FIXME BB */
+/* if (cpu_to_le32(FILE_CREATE) == pSMBr->CreateAction)
+ *pOplock |= CIFS_CREATE_ACTION; */
+ /* BB FIXME END */
+
+ if (pfile_info) {
+ pfile_info->CreationTime = 0; /* BB convert CreateTime*/
+ pfile_info->LastAccessTime = 0; /* BB fixme */
+ pfile_info->LastWriteTime = 0; /* BB fixme */
+ pfile_info->ChangeTime = 0; /* BB fixme */
+ pfile_info->Attributes =
+ cpu_to_le32(le16_to_cpu(pSMBr->FileAttributes));
+ /* the file_info buf is endian converted by caller */
+ pfile_info->AllocationSize =
+ cpu_to_le64(le32_to_cpu(pSMBr->EndOfFile));
+ pfile_info->EndOfFile = pfile_info->AllocationSize;
+ pfile_info->NumberOfLinks = cpu_to_le32(1);
+ pfile_info->DeletePending = 0;
+ }
+ }
+
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto OldOpenRetry;
+ return rc;
+}
+
+int
+CIFS_open(const unsigned int xid, struct cifs_open_parms *oparms, int *oplock,
+ FILE_ALL_INFO *buf)
+{
+ int rc = -EACCES;
+ OPEN_REQ *req = NULL;
+ OPEN_RSP *rsp = NULL;
+ int bytes_returned;
+ int name_len;
+ __u16 count;
+ struct cifs_sb_info *cifs_sb = oparms->cifs_sb;
+ struct cifs_tcon *tcon = oparms->tcon;
+ int remap = cifs_remap(cifs_sb);
+ const struct nls_table *nls = cifs_sb->local_nls;
+ int create_options = oparms->create_options;
+ int desired_access = oparms->desired_access;
+ int disposition = oparms->disposition;
+ const char *path = oparms->path;
+
+openRetry:
+ rc = smb_init(SMB_COM_NT_CREATE_ANDX, 24, tcon, (void **)&req,
+ (void **)&rsp);
+ if (rc)
+ return rc;
+
+ /* no commands go after this */
+ req->AndXCommand = 0xFF;
+
+ if (req->hdr.Flags2 & SMBFLG2_UNICODE) {
+ /* account for one byte pad to word boundary */
+ count = 1;
+ name_len = cifsConvertToUTF16((__le16 *)(req->fileName + 1),
+ path, PATH_MAX, nls, remap);
+ /* trailing null */
+ name_len++;
+ name_len *= 2;
+ req->NameLength = cpu_to_le16(name_len);
+ } else {
+ /* BB improve check for buffer overruns BB */
+ /* no pad */
+ count = 0;
+ name_len = strnlen(path, PATH_MAX);
+ /* trailing null */
+ name_len++;
+ req->NameLength = cpu_to_le16(name_len);
+ strncpy(req->fileName, path, name_len);
+ }
+
+ if (*oplock & REQ_OPLOCK)
+ req->OpenFlags = cpu_to_le32(REQ_OPLOCK);
+ else if (*oplock & REQ_BATCHOPLOCK)
+ req->OpenFlags = cpu_to_le32(REQ_BATCHOPLOCK);
+
+ req->DesiredAccess = cpu_to_le32(desired_access);
+ req->AllocationSize = 0;
+
+ /*
+ * Set file as system file if special file such as fifo and server
+ * expecting SFU style and no Unix extensions.
+ */
+ if (create_options & CREATE_OPTION_SPECIAL)
+ req->FileAttributes = cpu_to_le32(ATTR_SYSTEM);
+ else
+ req->FileAttributes = cpu_to_le32(ATTR_NORMAL);
+
+ /*
+ * XP does not handle ATTR_POSIX_SEMANTICS but it helps speed up case
+ * sensitive checks for other servers such as Samba.
+ */
+ if (tcon->ses->capabilities & CAP_UNIX)
+ req->FileAttributes |= cpu_to_le32(ATTR_POSIX_SEMANTICS);
+
+ if (create_options & CREATE_OPTION_READONLY)
+ req->FileAttributes |= cpu_to_le32(ATTR_READONLY);
+
+ req->ShareAccess = cpu_to_le32(FILE_SHARE_ALL);
+ req->CreateDisposition = cpu_to_le32(disposition);
+ req->CreateOptions = cpu_to_le32(create_options & CREATE_OPTIONS_MASK);
+
+ /* BB Expirement with various impersonation levels and verify */
+ req->ImpersonationLevel = cpu_to_le32(SECURITY_IMPERSONATION);
+ req->SecurityFlags = SECURITY_CONTEXT_TRACKING|SECURITY_EFFECTIVE_ONLY;
+
+ count += name_len;
+ inc_rfc1001_len(req, count);
+
+ req->ByteCount = cpu_to_le16(count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *)req,
+ (struct smb_hdr *)rsp, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_opens);
+ if (rc) {
+ cifs_dbg(FYI, "Error in Open = %d\n", rc);
+ cifs_buf_release(req);
+ if (rc == -EAGAIN)
+ goto openRetry;
+ return rc;
+ }
+
+ /* 1 byte no need to le_to_cpu */
+ *oplock = rsp->OplockLevel;
+ /* cifs fid stays in le */
+ oparms->fid->netfid = rsp->Fid;
+
+ /* Let caller know file was created so we can set the mode. */
+ /* Do we care about the CreateAction in any other cases? */
+ if (cpu_to_le32(FILE_CREATE) == rsp->CreateAction)
+ *oplock |= CIFS_CREATE_ACTION;
+
+ if (buf) {
+ /* copy from CreationTime to Attributes */
+ memcpy((char *)buf, (char *)&rsp->CreationTime, 36);
+ /* the file_info buf is endian converted by caller */
+ buf->AllocationSize = rsp->AllocationSize;
+ buf->EndOfFile = rsp->EndOfFile;
+ buf->NumberOfLinks = cpu_to_le32(1);
+ buf->DeletePending = 0;
+ }
+
+ cifs_buf_release(req);
+ return rc;
+}
+
+/*
+ * Discard any remaining data in the current SMB. To do this, we borrow the
+ * current bigbuf.
+ */
+int
+cifs_discard_remaining_data(struct TCP_Server_Info *server)
+{
+ unsigned int rfclen = get_rfc1002_length(server->smallbuf);
+ int remaining = rfclen + 4 - server->total_read;
+
+ while (remaining > 0) {
+ int length;
+
+ length = cifs_read_from_socket(server, server->bigbuf,
+ min_t(unsigned int, remaining,
+ CIFSMaxBufSize + MAX_HEADER_SIZE(server)));
+ if (length < 0)
+ return length;
+ server->total_read += length;
+ remaining -= length;
+ }
+
+ return 0;
+}
+
+static int
+__cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid,
+ bool malformed)
+{
+ int length;
+
+ length = cifs_discard_remaining_data(server);
+ dequeue_mid(mid, malformed);
+ mid->resp_buf = server->smallbuf;
+ server->smallbuf = NULL;
+ return length;
+}
+
+static int
+cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid)
+{
+ struct cifs_readdata *rdata = mid->callback_data;
+
+ return __cifs_readv_discard(server, mid, rdata->result);
+}
+
+int
+cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
+{
+ int length, len;
+ unsigned int data_offset, data_len;
+ struct cifs_readdata *rdata = mid->callback_data;
+ char *buf = server->smallbuf;
+ unsigned int buflen = get_rfc1002_length(buf) + 4;
+
+ cifs_dbg(FYI, "%s: mid=%llu offset=%llu bytes=%u\n",
+ __func__, mid->mid, rdata->offset, rdata->bytes);
+
+ /*
+ * read the rest of READ_RSP header (sans Data array), or whatever we
+ * can if there's not enough data. At this point, we've read down to
+ * the Mid.
+ */
+ len = min_t(unsigned int, buflen, server->vals->read_rsp_size) -
+ HEADER_SIZE(server) + 1;
+
+ length = cifs_read_from_socket(server,
+ buf + HEADER_SIZE(server) - 1, len);
+ if (length < 0)
+ return length;
+ server->total_read += length;
+
+ if (server->ops->is_session_expired &&
+ server->ops->is_session_expired(buf)) {
+ cifs_reconnect(server);
+ wake_up(&server->response_q);
+ return -1;
+ }
+
+ if (server->ops->is_status_pending &&
+ server->ops->is_status_pending(buf, server, 0)) {
+ cifs_discard_remaining_data(server);
+ return -1;
+ }
+
+ /* set up first two iov for signature check and to get credits */
+ rdata->iov[0].iov_base = buf;
+ rdata->iov[0].iov_len = 4;
+ rdata->iov[1].iov_base = buf + 4;
+ rdata->iov[1].iov_len = server->total_read - 4;
+ cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
+ rdata->iov[0].iov_base, rdata->iov[0].iov_len);
+ cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
+ rdata->iov[1].iov_base, rdata->iov[1].iov_len);
+
+ /* Was the SMB read successful? */
+ rdata->result = server->ops->map_error(buf, false);
+ if (rdata->result != 0) {
+ cifs_dbg(FYI, "%s: server returned error %d\n",
+ __func__, rdata->result);
+ /* normal error on read response */
+ return __cifs_readv_discard(server, mid, false);
+ }
+
+ /* Is there enough to get to the rest of the READ_RSP header? */
+ if (server->total_read < server->vals->read_rsp_size) {
+ cifs_dbg(FYI, "%s: server returned short header. got=%u expected=%zu\n",
+ __func__, server->total_read,
+ server->vals->read_rsp_size);
+ rdata->result = -EIO;
+ return cifs_readv_discard(server, mid);
+ }
+
+ data_offset = server->ops->read_data_offset(buf) + 4;
+ if (data_offset < server->total_read) {
+ /*
+ * win2k8 sometimes sends an offset of 0 when the read
+ * is beyond the EOF. Treat it as if the data starts just after
+ * the header.
+ */
+ cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
+ __func__, data_offset);
+ data_offset = server->total_read;
+ } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
+ /* data_offset is beyond the end of smallbuf */
+ cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
+ __func__, data_offset);
+ rdata->result = -EIO;
+ return cifs_readv_discard(server, mid);
+ }
+
+ cifs_dbg(FYI, "%s: total_read=%u data_offset=%u\n",
+ __func__, server->total_read, data_offset);
+
+ len = data_offset - server->total_read;
+ if (len > 0) {
+ /* read any junk before data into the rest of smallbuf */
+ length = cifs_read_from_socket(server,
+ buf + server->total_read, len);
+ if (length < 0)
+ return length;
+ server->total_read += length;
+ }
+
+ /* how much data is in the response? */
+ data_len = server->ops->read_data_length(buf);
+ if (data_offset + data_len > buflen) {
+ /* data_len is corrupt -- discard frame */
+ rdata->result = -EIO;
+ return cifs_readv_discard(server, mid);
+ }
+
+ length = rdata->read_into_pages(server, rdata, data_len);
+ if (length < 0)
+ return length;
+
+ server->total_read += length;
+
+ cifs_dbg(FYI, "total_read=%u buflen=%u remaining=%u\n",
+ server->total_read, buflen, data_len);
+
+ /* discard anything left over */
+ if (server->total_read < buflen)
+ return cifs_readv_discard(server, mid);
+
+ dequeue_mid(mid, false);
+ mid->resp_buf = server->smallbuf;
+ server->smallbuf = NULL;
+ return length;
+}
+
+static void
+cifs_readv_callback(struct mid_q_entry *mid)
+{
+ struct cifs_readdata *rdata = mid->callback_data;
+ struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
+ struct TCP_Server_Info *server = tcon->ses->server;
+ struct smb_rqst rqst = { .rq_iov = rdata->iov,
+ .rq_nvec = 2,
+ .rq_pages = rdata->pages,
+ .rq_npages = rdata->nr_pages,
+ .rq_pagesz = rdata->pagesz,
+ .rq_tailsz = rdata->tailsz };
+
+ cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
+ __func__, mid->mid, mid->mid_state, rdata->result,
+ rdata->bytes);
+
+ switch (mid->mid_state) {
+ case MID_RESPONSE_RECEIVED:
+ /* result already set, check signature */
+ if (server->sign) {
+ int rc = 0;
+
+ rc = cifs_verify_signature(&rqst, server,
+ mid->sequence_number);
+ if (rc)
+ cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
+ rc);
+ }
+ /* FIXME: should this be counted toward the initiating task? */
+ task_io_account_read(rdata->got_bytes);
+ cifs_stats_bytes_read(tcon, rdata->got_bytes);
+ break;
+ case MID_REQUEST_SUBMITTED:
+ case MID_RETRY_NEEDED:
+ rdata->result = -EAGAIN;
+ if (server->sign && rdata->got_bytes)
+ /* reset bytes number since we can not check a sign */
+ rdata->got_bytes = 0;
+ /* FIXME: should this be counted toward the initiating task? */
+ task_io_account_read(rdata->got_bytes);
+ cifs_stats_bytes_read(tcon, rdata->got_bytes);
+ break;
+ default:
+ rdata->result = -EIO;
+ }
+
+ queue_work(cifsiod_wq, &rdata->work);
+ DeleteMidQEntry(mid);
+ add_credits(server, 1, 0);
+}
+
+/* cifs_async_readv - send an async write, and set up mid to handle result */
+int
+cifs_async_readv(struct cifs_readdata *rdata)
+{
+ int rc;
+ READ_REQ *smb = NULL;
+ int wct;
+ struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
+ struct smb_rqst rqst = { .rq_iov = rdata->iov,
+ .rq_nvec = 2 };
+
+ cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
+ __func__, rdata->offset, rdata->bytes);
+
+ if (tcon->ses->capabilities & CAP_LARGE_FILES)
+ wct = 12;
+ else {
+ wct = 10; /* old style read */
+ if ((rdata->offset >> 32) > 0) {
+ /* can not handle this big offset for old */
+ return -EIO;
+ }
+ }
+
+ rc = small_smb_init(SMB_COM_READ_ANDX, wct, tcon, (void **)&smb);
+ if (rc)
+ return rc;
+
+ smb->hdr.Pid = cpu_to_le16((__u16)rdata->pid);
+ smb->hdr.PidHigh = cpu_to_le16((__u16)(rdata->pid >> 16));
+
+ smb->AndXCommand = 0xFF; /* none */
+ smb->Fid = rdata->cfile->fid.netfid;
+ smb->OffsetLow = cpu_to_le32(rdata->offset & 0xFFFFFFFF);
+ if (wct == 12)
+ smb->OffsetHigh = cpu_to_le32(rdata->offset >> 32);
+ smb->Remaining = 0;
+ smb->MaxCount = cpu_to_le16(rdata->bytes & 0xFFFF);
+ smb->MaxCountHigh = cpu_to_le32(rdata->bytes >> 16);
+ if (wct == 12)
+ smb->ByteCount = 0;
+ else {
+ /* old style read */
+ struct smb_com_readx_req *smbr =
+ (struct smb_com_readx_req *)smb;
+ smbr->ByteCount = 0;
+ }
+
+ /* 4 for RFC1001 length + 1 for BCC */
+ rdata->iov[0].iov_base = smb;
+ rdata->iov[0].iov_len = 4;
+ rdata->iov[1].iov_base = (char *)smb + 4;
+ rdata->iov[1].iov_len = get_rfc1002_length(smb);
+
+ kref_get(&rdata->refcount);
+ rc = cifs_call_async(tcon->ses->server, &rqst, cifs_readv_receive,
+ cifs_readv_callback, NULL, rdata, 0);
+
+ if (rc == 0)
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_reads);
+ else
+ kref_put(&rdata->refcount, cifs_readdata_release);
+
+ cifs_small_buf_release(smb);
+ return rc;
+}
+
+int
+CIFSSMBRead(const unsigned int xid, struct cifs_io_parms *io_parms,
+ unsigned int *nbytes, char **buf, int *pbuf_type)
+{
+ int rc = -EACCES;
+ READ_REQ *pSMB = NULL;
+ READ_RSP *pSMBr = NULL;
+ char *pReadData = NULL;
+ int wct;
+ int resp_buf_type = 0;
+ struct kvec iov[1];
+ struct kvec rsp_iov;
+ __u32 pid = io_parms->pid;
+ __u16 netfid = io_parms->netfid;
+ __u64 offset = io_parms->offset;
+ struct cifs_tcon *tcon = io_parms->tcon;
+ unsigned int count = io_parms->length;
+
+ cifs_dbg(FYI, "Reading %d bytes on fid %d\n", count, netfid);
+ if (tcon->ses->capabilities & CAP_LARGE_FILES)
+ wct = 12;
+ else {
+ wct = 10; /* old style read */
+ if ((offset >> 32) > 0) {
+ /* can not handle this big offset for old */
+ return -EIO;
+ }
+ }
+
+ *nbytes = 0;
+ rc = small_smb_init(SMB_COM_READ_ANDX, wct, tcon, (void **) &pSMB);
+ if (rc)
+ return rc;
+
+ pSMB->hdr.Pid = cpu_to_le16((__u16)pid);
+ pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid >> 16));
+
+ /* tcon and ses pointer are checked in smb_init */
+ if (tcon->ses->server == NULL)
+ return -ECONNABORTED;
+
+ pSMB->AndXCommand = 0xFF; /* none */
+ pSMB->Fid = netfid;
+ pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
+ if (wct == 12)
+ pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+
+ pSMB->Remaining = 0;
+ pSMB->MaxCount = cpu_to_le16(count & 0xFFFF);
+ pSMB->MaxCountHigh = cpu_to_le32(count >> 16);
+ if (wct == 12)
+ pSMB->ByteCount = 0; /* no need to do le conversion since 0 */
+ else {
+ /* old style read */
+ struct smb_com_readx_req *pSMBW =
+ (struct smb_com_readx_req *)pSMB;
+ pSMBW->ByteCount = 0;
+ }
+
+ iov[0].iov_base = (char *)pSMB;
+ iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4;
+ rc = SendReceive2(xid, tcon->ses, iov, 1, &resp_buf_type,
+ CIFS_LOG_ERROR, &rsp_iov);
+ cifs_small_buf_release(pSMB);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_reads);
+ pSMBr = (READ_RSP *)rsp_iov.iov_base;
+ if (rc) {
+ cifs_dbg(VFS, "Send error in read = %d\n", rc);
+ } else {
+ int data_length = le16_to_cpu(pSMBr->DataLengthHigh);
+ data_length = data_length << 16;
+ data_length += le16_to_cpu(pSMBr->DataLength);
+ *nbytes = data_length;
+
+ /*check that DataLength would not go beyond end of SMB */
+ if ((data_length > CIFSMaxBufSize)
+ || (data_length > count)) {
+ cifs_dbg(FYI, "bad length %d for count %d\n",
+ data_length, count);
+ rc = -EIO;
+ *nbytes = 0;
+ } else {
+ pReadData = (char *) (&pSMBr->hdr.Protocol) +
+ le16_to_cpu(pSMBr->DataOffset);
+/* if (rc = copy_to_user(buf, pReadData, data_length)) {
+ cifs_dbg(VFS, "Faulting on read rc = %d\n",rc);
+ rc = -EFAULT;
+ }*/ /* can not use copy_to_user when using page cache*/
+ if (*buf)
+ memcpy(*buf, pReadData, data_length);
+ }
+ }
+
+ if (*buf) {
+ free_rsp_buf(resp_buf_type, rsp_iov.iov_base);
+ } else if (resp_buf_type != CIFS_NO_BUFFER) {
+ /* return buffer to caller to free */
+ *buf = rsp_iov.iov_base;
+ if (resp_buf_type == CIFS_SMALL_BUFFER)
+ *pbuf_type = CIFS_SMALL_BUFFER;
+ else if (resp_buf_type == CIFS_LARGE_BUFFER)
+ *pbuf_type = CIFS_LARGE_BUFFER;
+ } /* else no valid buffer on return - leave as null */
+
+ /* Note: On -EAGAIN error only caller can retry on handle based calls
+ since file handle passed in no longer valid */
+ return rc;
+}
+
+
+int
+CIFSSMBWrite(const unsigned int xid, struct cifs_io_parms *io_parms,
+ unsigned int *nbytes, const char *buf)
+{
+ int rc = -EACCES;
+ WRITE_REQ *pSMB = NULL;
+ WRITE_RSP *pSMBr = NULL;
+ int bytes_returned, wct;
+ __u32 bytes_sent;
+ __u16 byte_count;
+ __u32 pid = io_parms->pid;
+ __u16 netfid = io_parms->netfid;
+ __u64 offset = io_parms->offset;
+ struct cifs_tcon *tcon = io_parms->tcon;
+ unsigned int count = io_parms->length;
+
+ *nbytes = 0;
+
+ /* cifs_dbg(FYI, "write at %lld %d bytes\n", offset, count);*/
+ if (tcon->ses == NULL)
+ return -ECONNABORTED;
+
+ if (tcon->ses->capabilities & CAP_LARGE_FILES)
+ wct = 14;
+ else {
+ wct = 12;
+ if ((offset >> 32) > 0) {
+ /* can not handle big offset for old srv */
+ return -EIO;
+ }
+ }
+
+ rc = smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->hdr.Pid = cpu_to_le16((__u16)pid);
+ pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid >> 16));
+
+ /* tcon and ses pointer are checked in smb_init */
+ if (tcon->ses->server == NULL)
+ return -ECONNABORTED;
+
+ pSMB->AndXCommand = 0xFF; /* none */
+ pSMB->Fid = netfid;
+ pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
+ if (wct == 14)
+ pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+
+ pSMB->Reserved = 0xFFFFFFFF;
+ pSMB->WriteMode = 0;
+ pSMB->Remaining = 0;
+
+ /* Can increase buffer size if buffer is big enough in some cases ie we
+ can send more if LARGE_WRITE_X capability returned by the server and if
+ our buffer is big enough or if we convert to iovecs on socket writes
+ and eliminate the copy to the CIFS buffer */
+ if (tcon->ses->capabilities & CAP_LARGE_WRITE_X) {
+ bytes_sent = min_t(const unsigned int, CIFSMaxBufSize, count);
+ } else {
+ bytes_sent = (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)
+ & ~0xFF;
+ }
+
+ if (bytes_sent > count)
+ bytes_sent = count;
+ pSMB->DataOffset =
+ cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
+ if (buf)
+ memcpy(pSMB->Data, buf, bytes_sent);
+ else if (count != 0) {
+ /* No buffer */
+ cifs_buf_release(pSMB);
+ return -EINVAL;
+ } /* else setting file size with write of zero bytes */
+ if (wct == 14)
+ byte_count = bytes_sent + 1; /* pad */
+ else /* wct == 12 */
+ byte_count = bytes_sent + 5; /* bigger pad, smaller smb hdr */
+
+ pSMB->DataLengthLow = cpu_to_le16(bytes_sent & 0xFFFF);
+ pSMB->DataLengthHigh = cpu_to_le16(bytes_sent >> 16);
+ inc_rfc1001_len(pSMB, byte_count);
+
+ if (wct == 14)
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ else { /* old style write has byte count 4 bytes earlier
+ so 4 bytes pad */
+ struct smb_com_writex_req *pSMBW =
+ (struct smb_com_writex_req *)pSMB;
+ pSMBW->ByteCount = cpu_to_le16(byte_count);
+ }
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_writes);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in write = %d\n", rc);
+ } else {
+ *nbytes = le16_to_cpu(pSMBr->CountHigh);
+ *nbytes = (*nbytes) << 16;
+ *nbytes += le16_to_cpu(pSMBr->Count);
+
+ /*
+ * Mask off high 16 bits when bytes written as returned by the
+ * server is greater than bytes requested by the client. Some
+ * OS/2 servers are known to set incorrect CountHigh values.
+ */
+ if (*nbytes > count)
+ *nbytes &= 0xFFFF;
+ }
+
+ cifs_buf_release(pSMB);
+
+ /* Note: On -EAGAIN error only caller can retry on handle based calls
+ since file handle passed in no longer valid */
+
+ return rc;
+}
+
+void
+cifs_writedata_release(struct kref *refcount)
+{
+ struct cifs_writedata *wdata = container_of(refcount,
+ struct cifs_writedata, refcount);
+
+ if (wdata->cfile)
+ cifsFileInfo_put(wdata->cfile);
+
+ kfree(wdata);
+}
+
+/*
+ * Write failed with a retryable error. Resend the write request. It's also
+ * possible that the page was redirtied so re-clean the page.
+ */
+static void
+cifs_writev_requeue(struct cifs_writedata *wdata)
+{
+ int i, rc = 0;
+ struct inode *inode = d_inode(wdata->cfile->dentry);
+ struct TCP_Server_Info *server;
+ unsigned int rest_len;
+
+ server = tlink_tcon(wdata->cfile->tlink)->ses->server;
+ i = 0;
+ rest_len = wdata->bytes;
+ do {
+ struct cifs_writedata *wdata2;
+ unsigned int j, nr_pages, wsize, tailsz, cur_len;
+
+ wsize = server->ops->wp_retry_size(inode);
+ if (wsize < rest_len) {
+ nr_pages = wsize / PAGE_SIZE;
+ if (!nr_pages) {
+ rc = -ENOTSUPP;
+ break;
+ }
+ cur_len = nr_pages * PAGE_SIZE;
+ tailsz = PAGE_SIZE;
+ } else {
+ nr_pages = DIV_ROUND_UP(rest_len, PAGE_SIZE);
+ cur_len = rest_len;
+ tailsz = rest_len - (nr_pages - 1) * PAGE_SIZE;
+ }
+
+ wdata2 = cifs_writedata_alloc(nr_pages, cifs_writev_complete);
+ if (!wdata2) {
+ rc = -ENOMEM;
+ break;
+ }
+
+ for (j = 0; j < nr_pages; j++) {
+ wdata2->pages[j] = wdata->pages[i + j];
+ lock_page(wdata2->pages[j]);
+ clear_page_dirty_for_io(wdata2->pages[j]);
+ }
+
+ wdata2->sync_mode = wdata->sync_mode;
+ wdata2->nr_pages = nr_pages;
+ wdata2->offset = page_offset(wdata2->pages[0]);
+ wdata2->pagesz = PAGE_SIZE;
+ wdata2->tailsz = tailsz;
+ wdata2->bytes = cur_len;
+
+ wdata2->cfile = find_writable_file(CIFS_I(inode), false);
+ if (!wdata2->cfile) {
+ cifs_dbg(VFS, "No writable handles for inode\n");
+ rc = -EBADF;
+ break;
+ }
+ wdata2->pid = wdata2->cfile->pid;
+ rc = server->ops->async_writev(wdata2, cifs_writedata_release);
+
+ for (j = 0; j < nr_pages; j++) {
+ unlock_page(wdata2->pages[j]);
+ if (rc != 0 && rc != -EAGAIN) {
+ SetPageError(wdata2->pages[j]);
+ end_page_writeback(wdata2->pages[j]);
+ put_page(wdata2->pages[j]);
+ }
+ }
+
+ if (rc) {
+ kref_put(&wdata2->refcount, cifs_writedata_release);
+ if (rc == -EAGAIN)
+ continue;
+ break;
+ }
+
+ rest_len -= cur_len;
+ i += nr_pages;
+ } while (i < wdata->nr_pages);
+
+ mapping_set_error(inode->i_mapping, rc);
+ kref_put(&wdata->refcount, cifs_writedata_release);
+}
+
+void
+cifs_writev_complete(struct work_struct *work)
+{
+ struct cifs_writedata *wdata = container_of(work,
+ struct cifs_writedata, work);
+ struct inode *inode = d_inode(wdata->cfile->dentry);
+ int i = 0;
+
+ if (wdata->result == 0) {
+ spin_lock(&inode->i_lock);
+ cifs_update_eof(CIFS_I(inode), wdata->offset, wdata->bytes);
+ spin_unlock(&inode->i_lock);
+ cifs_stats_bytes_written(tlink_tcon(wdata->cfile->tlink),
+ wdata->bytes);
+ } else if (wdata->sync_mode == WB_SYNC_ALL && wdata->result == -EAGAIN)
+ return cifs_writev_requeue(wdata);
+
+ for (i = 0; i < wdata->nr_pages; i++) {
+ struct page *page = wdata->pages[i];
+ if (wdata->result == -EAGAIN)
+ __set_page_dirty_nobuffers(page);
+ else if (wdata->result < 0)
+ SetPageError(page);
+ end_page_writeback(page);
+ put_page(page);
+ }
+ if (wdata->result != -EAGAIN)
+ mapping_set_error(inode->i_mapping, wdata->result);
+ kref_put(&wdata->refcount, cifs_writedata_release);
+}
+
+struct cifs_writedata *
+cifs_writedata_alloc(unsigned int nr_pages, work_func_t complete)
+{
+ struct cifs_writedata *wdata;
+
+ /* writedata + number of page pointers */
+ wdata = kzalloc(sizeof(*wdata) +
+ sizeof(struct page *) * nr_pages, GFP_NOFS);
+ if (wdata != NULL) {
+ kref_init(&wdata->refcount);
+ INIT_LIST_HEAD(&wdata->list);
+ init_completion(&wdata->done);
+ INIT_WORK(&wdata->work, complete);
+ }
+ return wdata;
+}
+
+/*
+ * Check the mid_state and signature on received buffer (if any), and queue the
+ * workqueue completion task.
+ */
+static void
+cifs_writev_callback(struct mid_q_entry *mid)
+{
+ struct cifs_writedata *wdata = mid->callback_data;
+ struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+ unsigned int written;
+ WRITE_RSP *smb = (WRITE_RSP *)mid->resp_buf;
+
+ switch (mid->mid_state) {
+ case MID_RESPONSE_RECEIVED:
+ wdata->result = cifs_check_receive(mid, tcon->ses->server, 0);
+ if (wdata->result != 0)
+ break;
+
+ written = le16_to_cpu(smb->CountHigh);
+ written <<= 16;
+ written += le16_to_cpu(smb->Count);
+ /*
+ * Mask off high 16 bits when bytes written as returned
+ * by the server is greater than bytes requested by the
+ * client. OS/2 servers are known to set incorrect
+ * CountHigh values.
+ */
+ if (written > wdata->bytes)
+ written &= 0xFFFF;
+
+ if (written < wdata->bytes)
+ wdata->result = -ENOSPC;
+ else
+ wdata->bytes = written;
+ break;
+ case MID_REQUEST_SUBMITTED:
+ case MID_RETRY_NEEDED:
+ wdata->result = -EAGAIN;
+ break;
+ default:
+ wdata->result = -EIO;
+ break;
+ }
+
+ queue_work(cifsiod_wq, &wdata->work);
+ DeleteMidQEntry(mid);
+ add_credits(tcon->ses->server, 1, 0);
+}
+
+/* cifs_async_writev - send an async write, and set up mid to handle result */
+int
+cifs_async_writev(struct cifs_writedata *wdata,
+ void (*release)(struct kref *kref))
+{
+ int rc = -EACCES;
+ WRITE_REQ *smb = NULL;
+ int wct;
+ struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+ struct kvec iov[2];
+ struct smb_rqst rqst = { };
+
+ if (tcon->ses->capabilities & CAP_LARGE_FILES) {
+ wct = 14;
+ } else {
+ wct = 12;
+ if (wdata->offset >> 32 > 0) {
+ /* can not handle big offset for old srv */
+ return -EIO;
+ }
+ }
+
+ rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **)&smb);
+ if (rc)
+ goto async_writev_out;
+
+ smb->hdr.Pid = cpu_to_le16((__u16)wdata->pid);
+ smb->hdr.PidHigh = cpu_to_le16((__u16)(wdata->pid >> 16));
+
+ smb->AndXCommand = 0xFF; /* none */
+ smb->Fid = wdata->cfile->fid.netfid;
+ smb->OffsetLow = cpu_to_le32(wdata->offset & 0xFFFFFFFF);
+ if (wct == 14)
+ smb->OffsetHigh = cpu_to_le32(wdata->offset >> 32);
+ smb->Reserved = 0xFFFFFFFF;
+ smb->WriteMode = 0;
+ smb->Remaining = 0;
+
+ smb->DataOffset =
+ cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
+
+ /* 4 for RFC1001 length + 1 for BCC */
+ iov[0].iov_len = 4;
+ iov[0].iov_base = smb;
+ iov[1].iov_len = get_rfc1002_length(smb) + 1;
+ iov[1].iov_base = (char *)smb + 4;
+
+ rqst.rq_iov = iov;
+ rqst.rq_nvec = 2;
+ rqst.rq_pages = wdata->pages;
+ rqst.rq_npages = wdata->nr_pages;
+ rqst.rq_pagesz = wdata->pagesz;
+ rqst.rq_tailsz = wdata->tailsz;
+
+ cifs_dbg(FYI, "async write at %llu %u bytes\n",
+ wdata->offset, wdata->bytes);
+
+ smb->DataLengthLow = cpu_to_le16(wdata->bytes & 0xFFFF);
+ smb->DataLengthHigh = cpu_to_le16(wdata->bytes >> 16);
+
+ if (wct == 14) {
+ inc_rfc1001_len(&smb->hdr, wdata->bytes + 1);
+ put_bcc(wdata->bytes + 1, &smb->hdr);
+ } else {
+ /* wct == 12 */
+ struct smb_com_writex_req *smbw =
+ (struct smb_com_writex_req *)smb;
+ inc_rfc1001_len(&smbw->hdr, wdata->bytes + 5);
+ put_bcc(wdata->bytes + 5, &smbw->hdr);
+ iov[1].iov_len += 4; /* pad bigger by four bytes */
+ }
+
+ kref_get(&wdata->refcount);
+ rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
+ cifs_writev_callback, NULL, wdata, 0);
+
+ if (rc == 0)
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_writes);
+ else
+ kref_put(&wdata->refcount, release);
+
+async_writev_out:
+ cifs_small_buf_release(smb);
+ return rc;
+}
+
+int
+CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms,
+ unsigned int *nbytes, struct kvec *iov, int n_vec)
+{
+ int rc = -EACCES;
+ WRITE_REQ *pSMB = NULL;
+ int wct;
+ int smb_hdr_len;
+ int resp_buf_type = 0;
+ __u32 pid = io_parms->pid;
+ __u16 netfid = io_parms->netfid;
+ __u64 offset = io_parms->offset;
+ struct cifs_tcon *tcon = io_parms->tcon;
+ unsigned int count = io_parms->length;
+ struct kvec rsp_iov;
+
+ *nbytes = 0;
+
+ cifs_dbg(FYI, "write2 at %lld %d bytes\n", (long long)offset, count);
+
+ if (tcon->ses->capabilities & CAP_LARGE_FILES) {
+ wct = 14;
+ } else {
+ wct = 12;
+ if ((offset >> 32) > 0) {
+ /* can not handle big offset for old srv */
+ return -EIO;
+ }
+ }
+ rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB);
+ if (rc)
+ return rc;
+
+ pSMB->hdr.Pid = cpu_to_le16((__u16)pid);
+ pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid >> 16));
+
+ /* tcon and ses pointer are checked in smb_init */
+ if (tcon->ses->server == NULL)
+ return -ECONNABORTED;
+
+ pSMB->AndXCommand = 0xFF; /* none */
+ pSMB->Fid = netfid;
+ pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
+ if (wct == 14)
+ pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+ pSMB->Reserved = 0xFFFFFFFF;
+ pSMB->WriteMode = 0;
+ pSMB->Remaining = 0;
+
+ pSMB->DataOffset =
+ cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
+
+ pSMB->DataLengthLow = cpu_to_le16(count & 0xFFFF);
+ pSMB->DataLengthHigh = cpu_to_le16(count >> 16);
+ /* header + 1 byte pad */
+ smb_hdr_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 1;
+ if (wct == 14)
+ inc_rfc1001_len(pSMB, count + 1);
+ else /* wct == 12 */
+ inc_rfc1001_len(pSMB, count + 5); /* smb data starts later */
+ if (wct == 14)
+ pSMB->ByteCount = cpu_to_le16(count + 1);
+ else /* wct == 12 */ /* bigger pad, smaller smb hdr, keep offset ok */ {
+ struct smb_com_writex_req *pSMBW =
+ (struct smb_com_writex_req *)pSMB;
+ pSMBW->ByteCount = cpu_to_le16(count + 5);
+ }
+ iov[0].iov_base = pSMB;
+ if (wct == 14)
+ iov[0].iov_len = smb_hdr_len + 4;
+ else /* wct == 12 pad bigger by four bytes */
+ iov[0].iov_len = smb_hdr_len + 8;
+
+ rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &resp_buf_type, 0,
+ &rsp_iov);
+ cifs_small_buf_release(pSMB);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_writes);
+ if (rc) {
+ cifs_dbg(FYI, "Send error Write2 = %d\n", rc);
+ } else if (resp_buf_type == 0) {
+ /* presumably this can not happen, but best to be safe */
+ rc = -EIO;
+ } else {
+ WRITE_RSP *pSMBr = (WRITE_RSP *)rsp_iov.iov_base;
+ *nbytes = le16_to_cpu(pSMBr->CountHigh);
+ *nbytes = (*nbytes) << 16;
+ *nbytes += le16_to_cpu(pSMBr->Count);
+
+ /*
+ * Mask off high 16 bits when bytes written as returned by the
+ * server is greater than bytes requested by the client. OS/2
+ * servers are known to set incorrect CountHigh values.
+ */
+ if (*nbytes > count)
+ *nbytes &= 0xFFFF;
+ }
+
+ free_rsp_buf(resp_buf_type, rsp_iov.iov_base);
+
+ /* Note: On -EAGAIN error only caller can retry on handle based calls
+ since file handle passed in no longer valid */
+
+ return rc;
+}
+
+int cifs_lockv(const unsigned int xid, struct cifs_tcon *tcon,
+ const __u16 netfid, const __u8 lock_type, const __u32 num_unlock,
+ const __u32 num_lock, LOCKING_ANDX_RANGE *buf)
+{
+ int rc = 0;
+ LOCK_REQ *pSMB = NULL;
+ struct kvec iov[2];
+ struct kvec rsp_iov;
+ int resp_buf_type;
+ __u16 count;
+
+ cifs_dbg(FYI, "cifs_lockv num lock %d num unlock %d\n",
+ num_lock, num_unlock);
+
+ rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB);
+ if (rc)
+ return rc;
+
+ pSMB->Timeout = 0;
+ pSMB->NumberOfLocks = cpu_to_le16(num_lock);
+ pSMB->NumberOfUnlocks = cpu_to_le16(num_unlock);
+ pSMB->LockType = lock_type;
+ pSMB->AndXCommand = 0xFF; /* none */
+ pSMB->Fid = netfid; /* netfid stays le */
+
+ count = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
+ inc_rfc1001_len(pSMB, count);
+ pSMB->ByteCount = cpu_to_le16(count);
+
+ iov[0].iov_base = (char *)pSMB;
+ iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4 -
+ (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
+ iov[1].iov_base = (char *)buf;
+ iov[1].iov_len = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
+
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
+ rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP,
+ &rsp_iov);
+ cifs_small_buf_release(pSMB);
+ if (rc)
+ cifs_dbg(FYI, "Send error in cifs_lockv = %d\n", rc);
+
+ return rc;
+}
+
+int
+CIFSSMBLock(const unsigned int xid, struct cifs_tcon *tcon,
+ const __u16 smb_file_id, const __u32 netpid, const __u64 len,
+ const __u64 offset, const __u32 numUnlock,
+ const __u32 numLock, const __u8 lockType,
+ const bool waitFlag, const __u8 oplock_level)
+{
+ int rc = 0;
+ LOCK_REQ *pSMB = NULL;
+/* LOCK_RSP *pSMBr = NULL; */ /* No response data other than rc to parse */
+ int bytes_returned;
+ int flags = 0;
+ __u16 count;
+
+ cifs_dbg(FYI, "CIFSSMBLock timeout %d numLock %d\n",
+ (int)waitFlag, numLock);
+ rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB);
+
+ if (rc)
+ return rc;
+
+ if (lockType == LOCKING_ANDX_OPLOCK_RELEASE) {
+ /* no response expected */
+ flags = CIFS_ASYNC_OP | CIFS_OBREAK_OP;
+ pSMB->Timeout = 0;
+ } else if (waitFlag) {
+ flags = CIFS_BLOCKING_OP; /* blocking operation, no timeout */
+ pSMB->Timeout = cpu_to_le32(-1);/* blocking - do not time out */
+ } else {
+ pSMB->Timeout = 0;
+ }
+
+ pSMB->NumberOfLocks = cpu_to_le16(numLock);
+ pSMB->NumberOfUnlocks = cpu_to_le16(numUnlock);
+ pSMB->LockType = lockType;
+ pSMB->OplockLevel = oplock_level;
+ pSMB->AndXCommand = 0xFF; /* none */
+ pSMB->Fid = smb_file_id; /* netfid stays le */
+
+ if ((numLock != 0) || (numUnlock != 0)) {
+ pSMB->Locks[0].Pid = cpu_to_le16(netpid);
+ /* BB where to store pid high? */
+ pSMB->Locks[0].LengthLow = cpu_to_le32((u32)len);
+ pSMB->Locks[0].LengthHigh = cpu_to_le32((u32)(len>>32));
+ pSMB->Locks[0].OffsetLow = cpu_to_le32((u32)offset);
+ pSMB->Locks[0].OffsetHigh = cpu_to_le32((u32)(offset>>32));
+ count = sizeof(LOCKING_ANDX_RANGE);
+ } else {
+ /* oplock break */
+ count = 0;
+ }
+ inc_rfc1001_len(pSMB, count);
+ pSMB->ByteCount = cpu_to_le16(count);
+
+ if (waitFlag)
+ rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMB, &bytes_returned);
+ else
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *)pSMB, flags);
+ cifs_small_buf_release(pSMB);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
+ if (rc)
+ cifs_dbg(FYI, "Send error in Lock = %d\n", rc);
+
+ /* Note: On -EAGAIN error only caller can retry on handle based calls
+ since file handle passed in no longer valid */
+ return rc;
+}
+
+int
+CIFSSMBPosixLock(const unsigned int xid, struct cifs_tcon *tcon,
+ const __u16 smb_file_id, const __u32 netpid,
+ const loff_t start_offset, const __u64 len,
+ struct file_lock *pLockData, const __u16 lock_type,
+ const bool waitFlag)
+{
+ struct smb_com_transaction2_sfi_req *pSMB = NULL;
+ struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
+ struct cifs_posix_lock *parm_data;
+ int rc = 0;
+ int timeout = 0;
+ int bytes_returned = 0;
+ int resp_buf_type = 0;
+ __u16 params, param_offset, offset, byte_count, count;
+ struct kvec iov[1];
+ struct kvec rsp_iov;
+
+ cifs_dbg(FYI, "Posix Lock\n");
+
+ rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+ if (rc)
+ return rc;
+
+ pSMBr = (struct smb_com_transaction2_sfi_rsp *)pSMB;
+
+ params = 6;
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+ offset = param_offset + params;
+
+ count = sizeof(struct cifs_posix_lock);
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB from sess */
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ if (pLockData)
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
+ else
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+ byte_count = 3 /* pad */ + params + count;
+ pSMB->DataCount = cpu_to_le16(count);
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ parm_data = (struct cifs_posix_lock *)
+ (((char *) &pSMB->hdr.Protocol) + offset);
+
+ parm_data->lock_type = cpu_to_le16(lock_type);
+ if (waitFlag) {
+ timeout = CIFS_BLOCKING_OP; /* blocking operation, no timeout */
+ parm_data->lock_flags = cpu_to_le16(1);
+ pSMB->Timeout = cpu_to_le32(-1);
+ } else
+ pSMB->Timeout = 0;
+
+ parm_data->pid = cpu_to_le32(netpid);
+ parm_data->start = cpu_to_le64(start_offset);
+ parm_data->length = cpu_to_le64(len); /* normalize negative numbers */
+
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->Fid = smb_file_id;
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_LOCK);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ if (waitFlag) {
+ rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned);
+ } else {
+ iov[0].iov_base = (char *)pSMB;
+ iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4;
+ rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */,
+ &resp_buf_type, timeout, &rsp_iov);
+ pSMBr = (struct smb_com_transaction2_sfi_rsp *)rsp_iov.iov_base;
+ }
+ cifs_small_buf_release(pSMB);
+
+ if (rc) {
+ cifs_dbg(FYI, "Send error in Posix Lock = %d\n", rc);
+ } else if (pLockData) {
+ /* lock structure can be returned on get */
+ __u16 data_offset;
+ __u16 data_count;
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || get_bcc(&pSMBr->hdr) < sizeof(*parm_data)) {
+ rc = -EIO; /* bad smb */
+ goto plk_err_exit;
+ }
+ data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ data_count = le16_to_cpu(pSMBr->t2.DataCount);
+ if (data_count < sizeof(struct cifs_posix_lock)) {
+ rc = -EIO;
+ goto plk_err_exit;
+ }
+ parm_data = (struct cifs_posix_lock *)
+ ((char *)&pSMBr->hdr.Protocol + data_offset);
+ if (parm_data->lock_type == cpu_to_le16(CIFS_UNLCK))
+ pLockData->fl_type = F_UNLCK;
+ else {
+ if (parm_data->lock_type ==
+ cpu_to_le16(CIFS_RDLCK))
+ pLockData->fl_type = F_RDLCK;
+ else if (parm_data->lock_type ==
+ cpu_to_le16(CIFS_WRLCK))
+ pLockData->fl_type = F_WRLCK;
+
+ pLockData->fl_start = le64_to_cpu(parm_data->start);
+ pLockData->fl_end = pLockData->fl_start +
+ le64_to_cpu(parm_data->length) - 1;
+ pLockData->fl_pid = -le32_to_cpu(parm_data->pid);
+ }
+ }
+
+plk_err_exit:
+ free_rsp_buf(resp_buf_type, rsp_iov.iov_base);
+
+ /* Note: On -EAGAIN error only caller can retry on handle based calls
+ since file handle passed in no longer valid */
+
+ return rc;
+}
+
+
+int
+CIFSSMBClose(const unsigned int xid, struct cifs_tcon *tcon, int smb_file_id)
+{
+ int rc = 0;
+ CLOSE_REQ *pSMB = NULL;
+ cifs_dbg(FYI, "In CIFSSMBClose\n");
+
+/* do not retry on dead session on close */
+ rc = small_smb_init(SMB_COM_CLOSE, 3, tcon, (void **) &pSMB);
+ if (rc == -EAGAIN)
+ return 0;
+ if (rc)
+ return rc;
+
+ pSMB->FileID = (__u16) smb_file_id;
+ pSMB->LastWriteTime = 0xFFFFFFFF;
+ pSMB->ByteCount = 0;
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_closes);
+ if (rc) {
+ if (rc != -EINTR) {
+ /* EINTR is expected when user ctl-c to kill app */
+ cifs_dbg(VFS, "Send error in Close = %d\n", rc);
+ }
+ }
+
+ /* Since session is dead, file will be closed on server already */
+ if (rc == -EAGAIN)
+ rc = 0;
+
+ return rc;
+}
+
+int
+CIFSSMBFlush(const unsigned int xid, struct cifs_tcon *tcon, int smb_file_id)
+{
+ int rc = 0;
+ FLUSH_REQ *pSMB = NULL;
+ cifs_dbg(FYI, "In CIFSSMBFlush\n");
+
+ rc = small_smb_init(SMB_COM_FLUSH, 1, tcon, (void **) &pSMB);
+ if (rc)
+ return rc;
+
+ pSMB->FileID = (__u16) smb_file_id;
+ pSMB->ByteCount = 0;
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_flushes);
+ if (rc)
+ cifs_dbg(VFS, "Send error in Flush = %d\n", rc);
+
+ return rc;
+}
+
+int
+CIFSSMBRename(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *from_name, const char *to_name,
+ struct cifs_sb_info *cifs_sb)
+{
+ int rc = 0;
+ RENAME_REQ *pSMB = NULL;
+ RENAME_RSP *pSMBr = NULL;
+ int bytes_returned;
+ int name_len, name_len2;
+ __u16 count;
+ int remap = cifs_remap(cifs_sb);
+
+ cifs_dbg(FYI, "In CIFSSMBRename\n");
+renameRetry:
+ rc = smb_init(SMB_COM_RENAME, 1, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->BufferFormat = 0x04;
+ pSMB->SearchAttributes =
+ cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
+ ATTR_DIRECTORY);
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len = cifsConvertToUTF16((__le16 *) pSMB->OldFileName,
+ from_name, PATH_MAX,
+ cifs_sb->local_nls, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ pSMB->OldFileName[name_len] = 0x04; /* pad */
+ /* protocol requires ASCII signature byte on Unicode string */
+ pSMB->OldFileName[name_len + 1] = 0x00;
+ name_len2 =
+ cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2],
+ to_name, PATH_MAX, cifs_sb->local_nls,
+ remap);
+ name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ;
+ name_len2 *= 2; /* convert to bytes */
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(from_name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->OldFileName, from_name, name_len);
+ name_len2 = strnlen(to_name, PATH_MAX);
+ name_len2++; /* trailing null */
+ pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */
+ strncpy(&pSMB->OldFileName[name_len + 1], to_name, name_len2);
+ name_len2++; /* trailing null */
+ name_len2++; /* signature byte */
+ }
+
+ count = 1 /* 1st signature byte */ + name_len + name_len2;
+ inc_rfc1001_len(pSMB, count);
+ pSMB->ByteCount = cpu_to_le16(count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_renames);
+ if (rc)
+ cifs_dbg(FYI, "Send error in rename = %d\n", rc);
+
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto renameRetry;
+
+ return rc;
+}
+
+int CIFSSMBRenameOpenFile(const unsigned int xid, struct cifs_tcon *pTcon,
+ int netfid, const char *target_name,
+ const struct nls_table *nls_codepage, int remap)
+{
+ struct smb_com_transaction2_sfi_req *pSMB = NULL;
+ struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
+ struct set_file_rename *rename_info;
+ char *data_offset;
+ char dummy_string[30];
+ int rc = 0;
+ int bytes_returned = 0;
+ int len_of_str;
+ __u16 params, param_offset, offset, count, byte_count;
+
+ cifs_dbg(FYI, "Rename to File by handle\n");
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, pTcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 6;
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+ offset = param_offset + params;
+
+ data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
+ rename_info = (struct set_file_rename *) data_offset;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB from sess */
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+ byte_count = 3 /* pad */ + params;
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ /* construct random name ".cifs_tmp<inodenum><mid>" */
+ rename_info->overwrite = cpu_to_le32(1);
+ rename_info->root_fid = 0;
+ /* unicode only call */
+ if (target_name == NULL) {
+ sprintf(dummy_string, "cifs%x", pSMB->hdr.Mid);
+ len_of_str =
+ cifsConvertToUTF16((__le16 *)rename_info->target_name,
+ dummy_string, 24, nls_codepage, remap);
+ } else {
+ len_of_str =
+ cifsConvertToUTF16((__le16 *)rename_info->target_name,
+ target_name, PATH_MAX, nls_codepage,
+ remap);
+ }
+ rename_info->target_name_len = cpu_to_le32(2 * len_of_str);
+ count = 12 /* sizeof(struct set_file_rename) */ + (2 * len_of_str);
+ byte_count += count;
+ pSMB->DataCount = cpu_to_le16(count);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->Fid = netfid;
+ pSMB->InformationLevel =
+ cpu_to_le16(SMB_SET_FILE_RENAME_INFORMATION);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceive(xid, pTcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&pTcon->stats.cifs_stats.num_t2renames);
+ if (rc)
+ cifs_dbg(FYI, "Send error in Rename (by file handle) = %d\n",
+ rc);
+
+ cifs_buf_release(pSMB);
+
+ /* Note: On -EAGAIN error only caller can retry on handle based calls
+ since file handle passed in no longer valid */
+
+ return rc;
+}
+
+int
+CIFSSMBCopy(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *fromName, const __u16 target_tid, const char *toName,
+ const int flags, const struct nls_table *nls_codepage, int remap)
+{
+ int rc = 0;
+ COPY_REQ *pSMB = NULL;
+ COPY_RSP *pSMBr = NULL;
+ int bytes_returned;
+ int name_len, name_len2;
+ __u16 count;
+
+ cifs_dbg(FYI, "In CIFSSMBCopy\n");
+copyRetry:
+ rc = smb_init(SMB_COM_COPY, 1, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->BufferFormat = 0x04;
+ pSMB->Tid2 = target_tid;
+
+ pSMB->Flags = cpu_to_le16(flags & COPY_TREE);
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len = cifsConvertToUTF16((__le16 *) pSMB->OldFileName,
+ fromName, PATH_MAX, nls_codepage,
+ remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ pSMB->OldFileName[name_len] = 0x04; /* pad */
+ /* protocol requires ASCII signature byte on Unicode string */
+ pSMB->OldFileName[name_len + 1] = 0x00;
+ name_len2 =
+ cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2],
+ toName, PATH_MAX, nls_codepage, remap);
+ name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ;
+ name_len2 *= 2; /* convert to bytes */
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(fromName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->OldFileName, fromName, name_len);
+ name_len2 = strnlen(toName, PATH_MAX);
+ name_len2++; /* trailing null */
+ pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */
+ strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2);
+ name_len2++; /* trailing null */
+ name_len2++; /* signature byte */
+ }
+
+ count = 1 /* 1st signature byte */ + name_len + name_len2;
+ inc_rfc1001_len(pSMB, count);
+ pSMB->ByteCount = cpu_to_le16(count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in copy = %d with %d files copied\n",
+ rc, le16_to_cpu(pSMBr->CopyCount));
+ }
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto copyRetry;
+
+ return rc;
+}
+
+int
+CIFSUnixCreateSymLink(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *fromName, const char *toName,
+ const struct nls_table *nls_codepage, int remap)
+{
+ TRANSACTION2_SPI_REQ *pSMB = NULL;
+ TRANSACTION2_SPI_RSP *pSMBr = NULL;
+ char *data_offset;
+ int name_len;
+ int name_len_target;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, param_offset, offset, byte_count;
+
+ cifs_dbg(FYI, "In Symlink Unix style\n");
+createSymLinkRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, fromName,
+ /* find define for this maxpathcomponent */
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(fromName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, fromName, name_len);
+ }
+ params = 6 + name_len;
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_spi_req,
+ InformationLevel) - 4;
+ offset = param_offset + params;
+
+ data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len_target =
+ cifsConvertToUTF16((__le16 *) data_offset, toName,
+ /* find define for this maxpathcomponent */
+ PATH_MAX, nls_codepage, remap);
+ name_len_target++; /* trailing null */
+ name_len_target *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len_target = strnlen(toName, PATH_MAX);
+ name_len_target++; /* trailing null */
+ strncpy(data_offset, toName, name_len_target);
+ }
+
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max on data count below from sess */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+ byte_count = 3 /* pad */ + params + name_len_target;
+ pSMB->DataCount = cpu_to_le16(name_len_target);
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_LINK);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_symlinks);
+ if (rc)
+ cifs_dbg(FYI, "Send error in SetPathInfo create symlink = %d\n",
+ rc);
+
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto createSymLinkRetry;
+
+ return rc;
+}
+
+int
+CIFSUnixCreateHardLink(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *fromName, const char *toName,
+ const struct nls_table *nls_codepage, int remap)
+{
+ TRANSACTION2_SPI_REQ *pSMB = NULL;
+ TRANSACTION2_SPI_RSP *pSMBr = NULL;
+ char *data_offset;
+ int name_len;
+ int name_len_target;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, param_offset, offset, byte_count;
+
+ cifs_dbg(FYI, "In Create Hard link Unix style\n");
+createHardLinkRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len = cifsConvertToUTF16((__le16 *) pSMB->FileName, toName,
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(toName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, toName, name_len);
+ }
+ params = 6 + name_len;
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_spi_req,
+ InformationLevel) - 4;
+ offset = param_offset + params;
+
+ data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len_target =
+ cifsConvertToUTF16((__le16 *) data_offset, fromName,
+ PATH_MAX, nls_codepage, remap);
+ name_len_target++; /* trailing null */
+ name_len_target *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len_target = strnlen(fromName, PATH_MAX);
+ name_len_target++; /* trailing null */
+ strncpy(data_offset, fromName, name_len_target);
+ }
+
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max on data count below from sess*/
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+ byte_count = 3 /* pad */ + params + name_len_target;
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->DataCount = cpu_to_le16(name_len_target);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_HLINK);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_hardlinks);
+ if (rc)
+ cifs_dbg(FYI, "Send error in SetPathInfo (hard link) = %d\n",
+ rc);
+
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto createHardLinkRetry;
+
+ return rc;
+}
+
+int
+CIFSCreateHardLink(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *from_name, const char *to_name,
+ struct cifs_sb_info *cifs_sb)
+{
+ int rc = 0;
+ NT_RENAME_REQ *pSMB = NULL;
+ RENAME_RSP *pSMBr = NULL;
+ int bytes_returned;
+ int name_len, name_len2;
+ __u16 count;
+ int remap = cifs_remap(cifs_sb);
+
+ cifs_dbg(FYI, "In CIFSCreateHardLink\n");
+winCreateHardLinkRetry:
+
+ rc = smb_init(SMB_COM_NT_RENAME, 4, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->SearchAttributes =
+ cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
+ ATTR_DIRECTORY);
+ pSMB->Flags = cpu_to_le16(CREATE_HARD_LINK);
+ pSMB->ClusterCount = 0;
+
+ pSMB->BufferFormat = 0x04;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->OldFileName, from_name,
+ PATH_MAX, cifs_sb->local_nls, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+
+ /* protocol specifies ASCII buffer format (0x04) for unicode */
+ pSMB->OldFileName[name_len] = 0x04;
+ pSMB->OldFileName[name_len + 1] = 0x00; /* pad */
+ name_len2 =
+ cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2],
+ to_name, PATH_MAX, cifs_sb->local_nls,
+ remap);
+ name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ;
+ name_len2 *= 2; /* convert to bytes */
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(from_name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->OldFileName, from_name, name_len);
+ name_len2 = strnlen(to_name, PATH_MAX);
+ name_len2++; /* trailing null */
+ pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */
+ strncpy(&pSMB->OldFileName[name_len + 1], to_name, name_len2);
+ name_len2++; /* trailing null */
+ name_len2++; /* signature byte */
+ }
+
+ count = 1 /* string type byte */ + name_len + name_len2;
+ inc_rfc1001_len(pSMB, count);
+ pSMB->ByteCount = cpu_to_le16(count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_hardlinks);
+ if (rc)
+ cifs_dbg(FYI, "Send error in hard link (NT rename) = %d\n", rc);
+
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto winCreateHardLinkRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBUnixQuerySymLink(const unsigned int xid, struct cifs_tcon *tcon,
+ const unsigned char *searchName, char **symlinkinfo,
+ const struct nls_table *nls_codepage, int remap)
+{
+/* SMB_QUERY_FILE_UNIX_LINK */
+ TRANSACTION2_QPI_REQ *pSMB = NULL;
+ TRANSACTION2_QPI_RSP *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned;
+ int name_len;
+ __u16 params, byte_count;
+ char *data_start;
+
+ cifs_dbg(FYI, "In QPathSymLinkInfo (Unix) for path %s\n", searchName);
+
+querySymLinkRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName,
+ searchName, PATH_MAX, nls_codepage,
+ remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(searchName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, searchName, name_len);
+ }
+
+ params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ;
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_LINK);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QuerySymLinkInfo = %d\n", rc);
+ } else {
+ /* decode response */
+
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+ /* BB also check enough total bytes returned */
+ if (rc || get_bcc(&pSMBr->hdr) < 2)
+ rc = -EIO;
+ else {
+ bool is_unicode;
+ u16 count = le16_to_cpu(pSMBr->t2.DataCount);
+
+ data_start = ((char *) &pSMBr->hdr.Protocol) +
+ le16_to_cpu(pSMBr->t2.DataOffset);
+
+ if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
+ is_unicode = true;
+ else
+ is_unicode = false;
+
+ /* BB FIXME investigate remapping reserved chars here */
+ *symlinkinfo = cifs_strndup_from_utf16(data_start,
+ count, is_unicode, nls_codepage);
+ if (!*symlinkinfo)
+ rc = -ENOMEM;
+ }
+ }
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto querySymLinkRetry;
+ return rc;
+}
+
+/*
+ * Recent Windows versions now create symlinks more frequently
+ * and they use the "reparse point" mechanism below. We can of course
+ * do symlinks nicely to Samba and other servers which support the
+ * CIFS Unix Extensions and we can also do SFU symlinks and "client only"
+ * "MF" symlinks optionally, but for recent Windows we really need to
+ * reenable the code below and fix the cifs_symlink callers to handle this.
+ * In the interim this code has been moved to its own config option so
+ * it is not compiled in by default until callers fixed up and more tested.
+ */
+int
+CIFSSMBQuerySymLink(const unsigned int xid, struct cifs_tcon *tcon,
+ __u16 fid, char **symlinkinfo,
+ const struct nls_table *nls_codepage)
+{
+ int rc = 0;
+ int bytes_returned;
+ struct smb_com_transaction_ioctl_req *pSMB;
+ struct smb_com_transaction_ioctl_rsp *pSMBr;
+ bool is_unicode;
+ unsigned int sub_len;
+ char *sub_start;
+ struct reparse_symlink_data *reparse_buf;
+ struct reparse_posix_data *posix_buf;
+ __u32 data_offset, data_count;
+ char *end_of_smb;
+
+ cifs_dbg(FYI, "In Windows reparse style QueryLink for fid %u\n", fid);
+ rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->TotalParameterCount = 0 ;
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le32(2);
+ /* BB find exact data count max from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00);
+ pSMB->MaxSetupCount = 4;
+ pSMB->Reserved = 0;
+ pSMB->ParameterOffset = 0;
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 4;
+ pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_IOCTL);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->FunctionCode = cpu_to_le32(FSCTL_GET_REPARSE_POINT);
+ pSMB->IsFsctl = 1; /* FSCTL */
+ pSMB->IsRootFlag = 0;
+ pSMB->Fid = fid; /* file handle always le */
+ pSMB->ByteCount = 0;
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QueryReparseLinkInfo = %d\n", rc);
+ goto qreparse_out;
+ }
+
+ data_offset = le32_to_cpu(pSMBr->DataOffset);
+ data_count = le32_to_cpu(pSMBr->DataCount);
+ if (get_bcc(&pSMBr->hdr) < 2 || data_offset > 512) {
+ /* BB also check enough total bytes returned */
+ rc = -EIO; /* bad smb */
+ goto qreparse_out;
+ }
+ if (!data_count || (data_count > 2048)) {
+ rc = -EIO;
+ cifs_dbg(FYI, "Invalid return data count on get reparse info ioctl\n");
+ goto qreparse_out;
+ }
+ end_of_smb = 2 + get_bcc(&pSMBr->hdr) + (char *)&pSMBr->ByteCount;
+ reparse_buf = (struct reparse_symlink_data *)
+ ((char *)&pSMBr->hdr.Protocol + data_offset);
+ if ((char *)reparse_buf >= end_of_smb) {
+ rc = -EIO;
+ goto qreparse_out;
+ }
+ if (reparse_buf->ReparseTag == cpu_to_le32(IO_REPARSE_TAG_NFS)) {
+ cifs_dbg(FYI, "NFS style reparse tag\n");
+ posix_buf = (struct reparse_posix_data *)reparse_buf;
+
+ if (posix_buf->InodeType != cpu_to_le64(NFS_SPECFILE_LNK)) {
+ cifs_dbg(FYI, "unsupported file type 0x%llx\n",
+ le64_to_cpu(posix_buf->InodeType));
+ rc = -EOPNOTSUPP;
+ goto qreparse_out;
+ }
+ is_unicode = true;
+ sub_len = le16_to_cpu(reparse_buf->ReparseDataLength);
+ if (posix_buf->PathBuffer + sub_len > end_of_smb) {
+ cifs_dbg(FYI, "reparse buf beyond SMB\n");
+ rc = -EIO;
+ goto qreparse_out;
+ }
+ *symlinkinfo = cifs_strndup_from_utf16(posix_buf->PathBuffer,
+ sub_len, is_unicode, nls_codepage);
+ goto qreparse_out;
+ } else if (reparse_buf->ReparseTag !=
+ cpu_to_le32(IO_REPARSE_TAG_SYMLINK)) {
+ rc = -EOPNOTSUPP;
+ goto qreparse_out;
+ }
+
+ /* Reparse tag is NTFS symlink */
+ sub_start = le16_to_cpu(reparse_buf->SubstituteNameOffset) +
+ reparse_buf->PathBuffer;
+ sub_len = le16_to_cpu(reparse_buf->SubstituteNameLength);
+ if (sub_start + sub_len > end_of_smb) {
+ cifs_dbg(FYI, "reparse buf beyond SMB\n");
+ rc = -EIO;
+ goto qreparse_out;
+ }
+ if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
+ is_unicode = true;
+ else
+ is_unicode = false;
+
+ /* BB FIXME investigate remapping reserved chars here */
+ *symlinkinfo = cifs_strndup_from_utf16(sub_start, sub_len, is_unicode,
+ nls_codepage);
+ if (!*symlinkinfo)
+ rc = -ENOMEM;
+qreparse_out:
+ cifs_buf_release(pSMB);
+
+ /*
+ * Note: On -EAGAIN error only caller can retry on handle based calls
+ * since file handle passed in no longer valid.
+ */
+ return rc;
+}
+
+int
+CIFSSMB_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
+ __u16 fid)
+{
+ int rc = 0;
+ int bytes_returned;
+ struct smb_com_transaction_compr_ioctl_req *pSMB;
+ struct smb_com_transaction_ioctl_rsp *pSMBr;
+
+ cifs_dbg(FYI, "Set compression for %u\n", fid);
+ rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->compression_state = cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
+
+ pSMB->TotalParameterCount = 0;
+ pSMB->TotalDataCount = cpu_to_le32(2);
+ pSMB->MaxParameterCount = 0;
+ pSMB->MaxDataCount = 0;
+ pSMB->MaxSetupCount = 4;
+ pSMB->Reserved = 0;
+ pSMB->ParameterOffset = 0;
+ pSMB->DataCount = cpu_to_le32(2);
+ pSMB->DataOffset =
+ cpu_to_le32(offsetof(struct smb_com_transaction_compr_ioctl_req,
+ compression_state) - 4); /* 84 */
+ pSMB->SetupCount = 4;
+ pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_IOCTL);
+ pSMB->ParameterCount = 0;
+ pSMB->FunctionCode = cpu_to_le32(FSCTL_SET_COMPRESSION);
+ pSMB->IsFsctl = 1; /* FSCTL */
+ pSMB->IsRootFlag = 0;
+ pSMB->Fid = fid; /* file handle always le */
+ /* 3 byte pad, followed by 2 byte compress state */
+ pSMB->ByteCount = cpu_to_le16(5);
+ inc_rfc1001_len(pSMB, 5);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc)
+ cifs_dbg(FYI, "Send error in SetCompression = %d\n", rc);
+
+ cifs_buf_release(pSMB);
+
+ /*
+ * Note: On -EAGAIN error only caller can retry on handle based calls
+ * since file handle passed in no longer valid.
+ */
+ return rc;
+}
+
+
+#ifdef CONFIG_CIFS_POSIX
+
+/*Convert an Access Control Entry from wire format to local POSIX xattr format*/
+static void cifs_convert_ace(struct posix_acl_xattr_entry *ace,
+ struct cifs_posix_ace *cifs_ace)
+{
+ /* u8 cifs fields do not need le conversion */
+ ace->e_perm = cpu_to_le16(cifs_ace->cifs_e_perm);
+ ace->e_tag = cpu_to_le16(cifs_ace->cifs_e_tag);
+ ace->e_id = cpu_to_le32(le64_to_cpu(cifs_ace->cifs_uid));
+/*
+ cifs_dbg(FYI, "perm %d tag %d id %d\n",
+ ace->e_perm, ace->e_tag, ace->e_id);
+*/
+
+ return;
+}
+
+/* Convert ACL from CIFS POSIX wire format to local Linux POSIX ACL xattr */
+static int cifs_copy_posix_acl(char *trgt, char *src, const int buflen,
+ const int acl_type, const int size_of_data_area)
+{
+ int size = 0;
+ int i;
+ __u16 count;
+ struct cifs_posix_ace *pACE;
+ struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)src;
+ struct posix_acl_xattr_header *local_acl = (void *)trgt;
+
+ if (le16_to_cpu(cifs_acl->version) != CIFS_ACL_VERSION)
+ return -EOPNOTSUPP;
+
+ if (acl_type == ACL_TYPE_ACCESS) {
+ count = le16_to_cpu(cifs_acl->access_entry_count);
+ pACE = &cifs_acl->ace_array[0];
+ size = sizeof(struct cifs_posix_acl);
+ size += sizeof(struct cifs_posix_ace) * count;
+ /* check if we would go beyond end of SMB */
+ if (size_of_data_area < size) {
+ cifs_dbg(FYI, "bad CIFS POSIX ACL size %d vs. %d\n",
+ size_of_data_area, size);
+ return -EINVAL;
+ }
+ } else if (acl_type == ACL_TYPE_DEFAULT) {
+ count = le16_to_cpu(cifs_acl->access_entry_count);
+ size = sizeof(struct cifs_posix_acl);
+ size += sizeof(struct cifs_posix_ace) * count;
+/* skip past access ACEs to get to default ACEs */
+ pACE = &cifs_acl->ace_array[count];
+ count = le16_to_cpu(cifs_acl->default_entry_count);
+ size += sizeof(struct cifs_posix_ace) * count;
+ /* check if we would go beyond end of SMB */
+ if (size_of_data_area < size)
+ return -EINVAL;
+ } else {
+ /* illegal type */
+ return -EINVAL;
+ }
+
+ size = posix_acl_xattr_size(count);
+ if ((buflen == 0) || (local_acl == NULL)) {
+ /* used to query ACL EA size */
+ } else if (size > buflen) {
+ return -ERANGE;
+ } else /* buffer big enough */ {
+ struct posix_acl_xattr_entry *ace = (void *)(local_acl + 1);
+
+ local_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION);
+ for (i = 0; i < count ; i++) {
+ cifs_convert_ace(&ace[i], pACE);
+ pACE++;
+ }
+ }
+ return size;
+}
+
+static __u16 convert_ace_to_cifs_ace(struct cifs_posix_ace *cifs_ace,
+ const struct posix_acl_xattr_entry *local_ace)
+{
+ __u16 rc = 0; /* 0 = ACL converted ok */
+
+ cifs_ace->cifs_e_perm = le16_to_cpu(local_ace->e_perm);
+ cifs_ace->cifs_e_tag = le16_to_cpu(local_ace->e_tag);
+ /* BB is there a better way to handle the large uid? */
+ if (local_ace->e_id == cpu_to_le32(-1)) {
+ /* Probably no need to le convert -1 on any arch but can not hurt */
+ cifs_ace->cifs_uid = cpu_to_le64(-1);
+ } else
+ cifs_ace->cifs_uid = cpu_to_le64(le32_to_cpu(local_ace->e_id));
+/*
+ cifs_dbg(FYI, "perm %d tag %d id %d\n",
+ ace->e_perm, ace->e_tag, ace->e_id);
+*/
+ return rc;
+}
+
+/* Convert ACL from local Linux POSIX xattr to CIFS POSIX ACL wire format */
+static __u16 ACL_to_cifs_posix(char *parm_data, const char *pACL,
+ const int buflen, const int acl_type)
+{
+ __u16 rc = 0;
+ struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)parm_data;
+ struct posix_acl_xattr_header *local_acl = (void *)pACL;
+ struct posix_acl_xattr_entry *ace = (void *)(local_acl + 1);
+ int count;
+ int i;
+
+ if ((buflen == 0) || (pACL == NULL) || (cifs_acl == NULL))
+ return 0;
+
+ count = posix_acl_xattr_count((size_t)buflen);
+ cifs_dbg(FYI, "setting acl with %d entries from buf of length %d and version of %d\n",
+ count, buflen, le32_to_cpu(local_acl->a_version));
+ if (le32_to_cpu(local_acl->a_version) != 2) {
+ cifs_dbg(FYI, "unknown POSIX ACL version %d\n",
+ le32_to_cpu(local_acl->a_version));
+ return 0;
+ }
+ cifs_acl->version = cpu_to_le16(1);
+ if (acl_type == ACL_TYPE_ACCESS) {
+ cifs_acl->access_entry_count = cpu_to_le16(count);
+ cifs_acl->default_entry_count = cpu_to_le16(0xFFFF);
+ } else if (acl_type == ACL_TYPE_DEFAULT) {
+ cifs_acl->default_entry_count = cpu_to_le16(count);
+ cifs_acl->access_entry_count = cpu_to_le16(0xFFFF);
+ } else {
+ cifs_dbg(FYI, "unknown ACL type %d\n", acl_type);
+ return 0;
+ }
+ for (i = 0; i < count; i++) {
+ rc = convert_ace_to_cifs_ace(&cifs_acl->ace_array[i], &ace[i]);
+ if (rc != 0) {
+ /* ACE not converted */
+ break;
+ }
+ }
+ if (rc == 0) {
+ rc = (__u16)(count * sizeof(struct cifs_posix_ace));
+ rc += sizeof(struct cifs_posix_acl);
+ /* BB add check to make sure ACL does not overflow SMB */
+ }
+ return rc;
+}
+
+int
+CIFSSMBGetPosixACL(const unsigned int xid, struct cifs_tcon *tcon,
+ const unsigned char *searchName,
+ char *acl_inf, const int buflen, const int acl_type,
+ const struct nls_table *nls_codepage, int remap)
+{
+/* SMB_QUERY_POSIX_ACL */
+ TRANSACTION2_QPI_REQ *pSMB = NULL;
+ TRANSACTION2_QPI_RSP *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned;
+ int name_len;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "In GetPosixACL (Unix) for path %s\n", searchName);
+
+queryAclRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName,
+ searchName, PATH_MAX, nls_codepage,
+ remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ pSMB->FileName[name_len] = 0;
+ pSMB->FileName[name_len+1] = 0;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(searchName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, searchName, name_len);
+ }
+
+ params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ;
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max data count below from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(4000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ pSMB->ParameterOffset = cpu_to_le16(
+ offsetof(struct smb_com_transaction2_qpi_req,
+ InformationLevel) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_ACL);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_acl_get);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in Query POSIX ACL = %d\n", rc);
+ } else {
+ /* decode response */
+
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+ /* BB also check enough total bytes returned */
+ if (rc || get_bcc(&pSMBr->hdr) < 2)
+ rc = -EIO; /* bad smb */
+ else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ __u16 count = le16_to_cpu(pSMBr->t2.DataCount);
+ rc = cifs_copy_posix_acl(acl_inf,
+ (char *)&pSMBr->hdr.Protocol+data_offset,
+ buflen, acl_type, count);
+ }
+ }
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto queryAclRetry;
+ return rc;
+}
+
+int
+CIFSSMBSetPosixACL(const unsigned int xid, struct cifs_tcon *tcon,
+ const unsigned char *fileName,
+ const char *local_acl, const int buflen,
+ const int acl_type,
+ const struct nls_table *nls_codepage, int remap)
+{
+ struct smb_com_transaction2_spi_req *pSMB = NULL;
+ struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
+ char *parm_data;
+ int name_len;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, byte_count, data_count, param_offset, offset;
+
+ cifs_dbg(FYI, "In SetPosixACL (Unix) for path %s\n", fileName);
+setAclRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName,
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(fileName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, fileName, name_len);
+ }
+ params = 6 + name_len;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find max SMB size from sess */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_spi_req,
+ InformationLevel) - 4;
+ offset = param_offset + params;
+ parm_data = ((char *) &pSMB->hdr.Protocol) + offset;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+
+ /* convert to on the wire format for POSIX ACL */
+ data_count = ACL_to_cifs_posix(parm_data, local_acl, buflen, acl_type);
+
+ if (data_count == 0) {
+ rc = -EOPNOTSUPP;
+ goto setACLerrorExit;
+ }
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_ACL);
+ byte_count = 3 /* pad */ + params + data_count;
+ pSMB->DataCount = cpu_to_le16(data_count);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc)
+ cifs_dbg(FYI, "Set POSIX ACL returned %d\n", rc);
+
+setACLerrorExit:
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto setAclRetry;
+ return rc;
+}
+
+/* BB fix tabs in this function FIXME BB */
+int
+CIFSGetExtAttr(const unsigned int xid, struct cifs_tcon *tcon,
+ const int netfid, __u64 *pExtAttrBits, __u64 *pMask)
+{
+ int rc = 0;
+ struct smb_t2_qfi_req *pSMB = NULL;
+ struct smb_t2_qfi_rsp *pSMBr = NULL;
+ int bytes_returned;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "In GetExtAttr\n");
+ if (tcon == NULL)
+ return -ENODEV;
+
+GetExtAttrRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2 /* level */ + 2 /* fid */;
+ pSMB->t2.TotalDataCount = 0;
+ pSMB->t2.MaxParameterCount = cpu_to_le16(4);
+ /* BB find exact max data count below from sess structure BB */
+ pSMB->t2.MaxDataCount = cpu_to_le16(4000);
+ pSMB->t2.MaxSetupCount = 0;
+ pSMB->t2.Reserved = 0;
+ pSMB->t2.Flags = 0;
+ pSMB->t2.Timeout = 0;
+ pSMB->t2.Reserved2 = 0;
+ pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req,
+ Fid) - 4);
+ pSMB->t2.DataCount = 0;
+ pSMB->t2.DataOffset = 0;
+ pSMB->t2.SetupCount = 1;
+ pSMB->t2.Reserved3 = 0;
+ pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
+ byte_count = params + 1 /* pad */ ;
+ pSMB->t2.TotalParameterCount = cpu_to_le16(params);
+ pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_ATTR_FLAGS);
+ pSMB->Pad = 0;
+ pSMB->Fid = netfid;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->t2.ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "error %d in GetExtAttr\n", rc);
+ } else {
+ /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+ /* BB also check enough total bytes returned */
+ if (rc || get_bcc(&pSMBr->hdr) < 2)
+ /* If rc should we check for EOPNOSUPP and
+ disable the srvino flag? or in caller? */
+ rc = -EIO; /* bad smb */
+ else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ __u16 count = le16_to_cpu(pSMBr->t2.DataCount);
+ struct file_chattr_info *pfinfo;
+ /* BB Do we need a cast or hash here ? */
+ if (count != 16) {
+ cifs_dbg(FYI, "Illegal size ret in GetExtAttr\n");
+ rc = -EIO;
+ goto GetExtAttrOut;
+ }
+ pfinfo = (struct file_chattr_info *)
+ (data_offset + (char *) &pSMBr->hdr.Protocol);
+ *pExtAttrBits = le64_to_cpu(pfinfo->mode);
+ *pMask = le64_to_cpu(pfinfo->mask);
+ }
+ }
+GetExtAttrOut:
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto GetExtAttrRetry;
+ return rc;
+}
+
+#endif /* CONFIG_POSIX */
+
+#ifdef CONFIG_CIFS_ACL
+/*
+ * Initialize NT TRANSACT SMB into small smb request buffer. This assumes that
+ * all NT TRANSACTS that we init here have total parm and data under about 400
+ * bytes (to fit in small cifs buffer size), which is the case so far, it
+ * easily fits. NB: Setup words themselves and ByteCount MaxSetupCount (size of
+ * returned setup area) and MaxParameterCount (returned parms size) must be set
+ * by caller
+ */
+static int
+smb_init_nttransact(const __u16 sub_command, const int setup_count,
+ const int parm_len, struct cifs_tcon *tcon,
+ void **ret_buf)
+{
+ int rc;
+ __u32 temp_offset;
+ struct smb_com_ntransact_req *pSMB;
+
+ rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon,
+ (void **)&pSMB);
+ if (rc)
+ return rc;
+ *ret_buf = (void *)pSMB;
+ pSMB->Reserved = 0;
+ pSMB->TotalParameterCount = cpu_to_le32(parm_len);
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->DataCount = pSMB->TotalDataCount;
+ temp_offset = offsetof(struct smb_com_ntransact_req, Parms) +
+ (setup_count * 2) - 4 /* for rfc1001 length itself */;
+ pSMB->ParameterOffset = cpu_to_le32(temp_offset);
+ pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len);
+ pSMB->SetupCount = setup_count; /* no need to le convert byte fields */
+ pSMB->SubCommand = cpu_to_le16(sub_command);
+ return 0;
+}
+
+static int
+validate_ntransact(char *buf, char **ppparm, char **ppdata,
+ __u32 *pparmlen, __u32 *pdatalen)
+{
+ char *end_of_smb;
+ __u32 data_count, data_offset, parm_count, parm_offset;
+ struct smb_com_ntransact_rsp *pSMBr;
+ u16 bcc;
+
+ *pdatalen = 0;
+ *pparmlen = 0;
+
+ if (buf == NULL)
+ return -EINVAL;
+
+ pSMBr = (struct smb_com_ntransact_rsp *)buf;
+
+ bcc = get_bcc(&pSMBr->hdr);
+ end_of_smb = 2 /* sizeof byte count */ + bcc +
+ (char *)&pSMBr->ByteCount;
+
+ data_offset = le32_to_cpu(pSMBr->DataOffset);
+ data_count = le32_to_cpu(pSMBr->DataCount);
+ parm_offset = le32_to_cpu(pSMBr->ParameterOffset);
+ parm_count = le32_to_cpu(pSMBr->ParameterCount);
+
+ *ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset;
+ *ppdata = (char *)&pSMBr->hdr.Protocol + data_offset;
+
+ /* should we also check that parm and data areas do not overlap? */
+ if (*ppparm > end_of_smb) {
+ cifs_dbg(FYI, "parms start after end of smb\n");
+ return -EINVAL;
+ } else if (parm_count + *ppparm > end_of_smb) {
+ cifs_dbg(FYI, "parm end after end of smb\n");
+ return -EINVAL;
+ } else if (*ppdata > end_of_smb) {
+ cifs_dbg(FYI, "data starts after end of smb\n");
+ return -EINVAL;
+ } else if (data_count + *ppdata > end_of_smb) {
+ cifs_dbg(FYI, "data %p + count %d (%p) past smb end %p start %p\n",
+ *ppdata, data_count, (data_count + *ppdata),
+ end_of_smb, pSMBr);
+ return -EINVAL;
+ } else if (parm_count + data_count > bcc) {
+ cifs_dbg(FYI, "parm count and data count larger than SMB\n");
+ return -EINVAL;
+ }
+ *pdatalen = data_count;
+ *pparmlen = parm_count;
+ return 0;
+}
+
+/* Get Security Descriptor (by handle) from remote server for a file or dir */
+int
+CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,
+ struct cifs_ntsd **acl_inf, __u32 *pbuflen)
+{
+ int rc = 0;
+ int buf_type = 0;
+ QUERY_SEC_DESC_REQ *pSMB;
+ struct kvec iov[1];
+ struct kvec rsp_iov;
+
+ cifs_dbg(FYI, "GetCifsACL\n");
+
+ *pbuflen = 0;
+ *acl_inf = NULL;
+
+ rc = smb_init_nttransact(NT_TRANSACT_QUERY_SECURITY_DESC, 0,
+ 8 /* parm len */, tcon, (void **) &pSMB);
+ if (rc)
+ return rc;
+
+ pSMB->MaxParameterCount = cpu_to_le32(4);
+ /* BB TEST with big acls that might need to be e.g. larger than 16K */
+ pSMB->MaxSetupCount = 0;
+ pSMB->Fid = fid; /* file handle always le */
+ pSMB->AclFlags = cpu_to_le32(CIFS_ACL_OWNER | CIFS_ACL_GROUP |
+ CIFS_ACL_DACL);
+ pSMB->ByteCount = cpu_to_le16(11); /* 3 bytes pad + 8 bytes parm */
+ inc_rfc1001_len(pSMB, 11);
+ iov[0].iov_base = (char *)pSMB;
+ iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4;
+
+ rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovec */, &buf_type,
+ 0, &rsp_iov);
+ cifs_small_buf_release(pSMB);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_acl_get);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QuerySecDesc = %d\n", rc);
+ } else { /* decode response */
+ __le32 *parm;
+ __u32 parm_len;
+ __u32 acl_len;
+ struct smb_com_ntransact_rsp *pSMBr;
+ char *pdata;
+
+/* validate_nttransact */
+ rc = validate_ntransact(rsp_iov.iov_base, (char **)&parm,
+ &pdata, &parm_len, pbuflen);
+ if (rc)
+ goto qsec_out;
+ pSMBr = (struct smb_com_ntransact_rsp *)rsp_iov.iov_base;
+
+ cifs_dbg(FYI, "smb %p parm %p data %p\n",
+ pSMBr, parm, *acl_inf);
+
+ if (le32_to_cpu(pSMBr->ParameterCount) != 4) {
+ rc = -EIO; /* bad smb */
+ *pbuflen = 0;
+ goto qsec_out;
+ }
+
+/* BB check that data area is minimum length and as big as acl_len */
+
+ acl_len = le32_to_cpu(*parm);
+ if (acl_len != *pbuflen) {
+ cifs_dbg(VFS, "acl length %d does not match %d\n",
+ acl_len, *pbuflen);
+ if (*pbuflen > acl_len)
+ *pbuflen = acl_len;
+ }
+
+ /* check if buffer is big enough for the acl
+ header followed by the smallest SID */
+ if ((*pbuflen < sizeof(struct cifs_ntsd) + 8) ||
+ (*pbuflen >= 64 * 1024)) {
+ cifs_dbg(VFS, "bad acl length %d\n", *pbuflen);
+ rc = -EINVAL;
+ *pbuflen = 0;
+ } else {
+ *acl_inf = kmemdup(pdata, *pbuflen, GFP_KERNEL);
+ if (*acl_inf == NULL) {
+ *pbuflen = 0;
+ rc = -ENOMEM;
+ }
+ }
+ }
+qsec_out:
+ free_rsp_buf(buf_type, rsp_iov.iov_base);
+ return rc;
+}
+
+int
+CIFSSMBSetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,
+ struct cifs_ntsd *pntsd, __u32 acllen, int aclflag)
+{
+ __u16 byte_count, param_count, data_count, param_offset, data_offset;
+ int rc = 0;
+ int bytes_returned = 0;
+ SET_SEC_DESC_REQ *pSMB = NULL;
+ void *pSMBr;
+
+setCifsAclRetry:
+ rc = smb_init(SMB_COM_NT_TRANSACT, 19, tcon, (void **) &pSMB, &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+
+ param_count = 8;
+ param_offset = offsetof(struct smb_com_transaction_ssec_req, Fid) - 4;
+ data_count = acllen;
+ data_offset = param_offset + param_count;
+ byte_count = 3 /* pad */ + param_count;
+
+ pSMB->DataCount = cpu_to_le32(data_count);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->MaxParameterCount = cpu_to_le32(4);
+ pSMB->MaxDataCount = cpu_to_le32(16384);
+ pSMB->ParameterCount = cpu_to_le32(param_count);
+ pSMB->ParameterOffset = cpu_to_le32(param_offset);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->DataOffset = cpu_to_le32(data_offset);
+ pSMB->SetupCount = 0;
+ pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_SET_SECURITY_DESC);
+ pSMB->ByteCount = cpu_to_le16(byte_count+data_count);
+
+ pSMB->Fid = fid; /* file handle always le */
+ pSMB->Reserved2 = 0;
+ pSMB->AclFlags = cpu_to_le32(aclflag);
+
+ if (pntsd && acllen) {
+ memcpy((char *)pSMBr + offsetof(struct smb_hdr, Protocol) +
+ data_offset, pntsd, acllen);
+ inc_rfc1001_len(pSMB, byte_count + data_count);
+ } else
+ inc_rfc1001_len(pSMB, byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+
+ cifs_dbg(FYI, "SetCIFSACL bytes_returned: %d, rc: %d\n",
+ bytes_returned, rc);
+ if (rc)
+ cifs_dbg(FYI, "Set CIFS ACL returned %d\n", rc);
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto setCifsAclRetry;
+
+ return (rc);
+}
+
+#endif /* CONFIG_CIFS_ACL */
+
+/* Legacy Query Path Information call for lookup to old servers such
+ as Win9x/WinME */
+int
+SMBQueryInformation(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *search_name, FILE_ALL_INFO *data,
+ const struct nls_table *nls_codepage, int remap)
+{
+ QUERY_INFORMATION_REQ *pSMB;
+ QUERY_INFORMATION_RSP *pSMBr;
+ int rc = 0;
+ int bytes_returned;
+ int name_len;
+
+ cifs_dbg(FYI, "In SMBQPath path %s\n", search_name);
+QInfRetry:
+ rc = smb_init(SMB_COM_QUERY_INFORMATION, 0, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName,
+ search_name, PATH_MAX, nls_codepage,
+ remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else {
+ name_len = strnlen(search_name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, search_name, name_len);
+ }
+ pSMB->BufferFormat = 0x04;
+ name_len++; /* account for buffer type byte */
+ inc_rfc1001_len(pSMB, (__u16)name_len);
+ pSMB->ByteCount = cpu_to_le16(name_len);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QueryInfo = %d\n", rc);
+ } else if (data) {
+ struct timespec ts;
+ __u32 time = le32_to_cpu(pSMBr->last_write_time);
+
+ /* decode response */
+ /* BB FIXME - add time zone adjustment BB */
+ memset(data, 0, sizeof(FILE_ALL_INFO));
+ ts.tv_nsec = 0;
+ ts.tv_sec = time;
+ /* decode time fields */
+ data->ChangeTime = cpu_to_le64(cifs_UnixTimeToNT(ts));
+ data->LastWriteTime = data->ChangeTime;
+ data->LastAccessTime = 0;
+ data->AllocationSize =
+ cpu_to_le64(le32_to_cpu(pSMBr->size));
+ data->EndOfFile = data->AllocationSize;
+ data->Attributes =
+ cpu_to_le32(le16_to_cpu(pSMBr->attr));
+ } else
+ rc = -EIO; /* bad buffer passed in */
+
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto QInfRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ u16 netfid, FILE_ALL_INFO *pFindData)
+{
+ struct smb_t2_qfi_req *pSMB = NULL;
+ struct smb_t2_qfi_rsp *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned;
+ __u16 params, byte_count;
+
+QFileInfoRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2 /* level */ + 2 /* fid */;
+ pSMB->t2.TotalDataCount = 0;
+ pSMB->t2.MaxParameterCount = cpu_to_le16(4);
+ /* BB find exact max data count below from sess structure BB */
+ pSMB->t2.MaxDataCount = cpu_to_le16(CIFSMaxBufSize);
+ pSMB->t2.MaxSetupCount = 0;
+ pSMB->t2.Reserved = 0;
+ pSMB->t2.Flags = 0;
+ pSMB->t2.Timeout = 0;
+ pSMB->t2.Reserved2 = 0;
+ pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req,
+ Fid) - 4);
+ pSMB->t2.DataCount = 0;
+ pSMB->t2.DataOffset = 0;
+ pSMB->t2.SetupCount = 1;
+ pSMB->t2.Reserved3 = 0;
+ pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
+ byte_count = params + 1 /* pad */ ;
+ pSMB->t2.TotalParameterCount = cpu_to_le16(params);
+ pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_ALL_INFO);
+ pSMB->Pad = 0;
+ pSMB->Fid = netfid;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->t2.ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QFileInfo = %d", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc) /* BB add auto retry on EOPNOTSUPP? */
+ rc = -EIO;
+ else if (get_bcc(&pSMBr->hdr) < 40)
+ rc = -EIO; /* bad smb */
+ else if (pFindData) {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ memcpy((char *) pFindData,
+ (char *) &pSMBr->hdr.Protocol +
+ data_offset, sizeof(FILE_ALL_INFO));
+ } else
+ rc = -ENOMEM;
+ }
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto QFileInfoRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBQPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *search_name, FILE_ALL_INFO *data,
+ int legacy /* old style infolevel */,
+ const struct nls_table *nls_codepage, int remap)
+{
+ /* level 263 SMB_QUERY_FILE_ALL_INFO */
+ TRANSACTION2_QPI_REQ *pSMB = NULL;
+ TRANSACTION2_QPI_RSP *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned;
+ int name_len;
+ __u16 params, byte_count;
+
+ /* cifs_dbg(FYI, "In QPathInfo path %s\n", search_name); */
+QPathInfoRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, search_name,
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(search_name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, search_name, name_len);
+ }
+
+ params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(4000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ if (legacy)
+ pSMB->InformationLevel = cpu_to_le16(SMB_INFO_STANDARD);
+ else
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_ALL_INFO);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QPathInfo = %d\n", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc) /* BB add auto retry on EOPNOTSUPP? */
+ rc = -EIO;
+ else if (!legacy && get_bcc(&pSMBr->hdr) < 40)
+ rc = -EIO; /* bad smb */
+ else if (legacy && get_bcc(&pSMBr->hdr) < 24)
+ rc = -EIO; /* 24 or 26 expected but we do not read
+ last field */
+ else if (data) {
+ int size;
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+
+ /*
+ * On legacy responses we do not read the last field,
+ * EAsize, fortunately since it varies by subdialect and
+ * also note it differs on Set vs Get, ie two bytes or 4
+ * bytes depending but we don't care here.
+ */
+ if (legacy)
+ size = sizeof(FILE_INFO_STANDARD);
+ else
+ size = sizeof(FILE_ALL_INFO);
+ memcpy((char *) data, (char *) &pSMBr->hdr.Protocol +
+ data_offset, size);
+ } else
+ rc = -ENOMEM;
+ }
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto QPathInfoRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBUnixQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ u16 netfid, FILE_UNIX_BASIC_INFO *pFindData)
+{
+ struct smb_t2_qfi_req *pSMB = NULL;
+ struct smb_t2_qfi_rsp *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned;
+ __u16 params, byte_count;
+
+UnixQFileInfoRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2 /* level */ + 2 /* fid */;
+ pSMB->t2.TotalDataCount = 0;
+ pSMB->t2.MaxParameterCount = cpu_to_le16(4);
+ /* BB find exact max data count below from sess structure BB */
+ pSMB->t2.MaxDataCount = cpu_to_le16(CIFSMaxBufSize);
+ pSMB->t2.MaxSetupCount = 0;
+ pSMB->t2.Reserved = 0;
+ pSMB->t2.Flags = 0;
+ pSMB->t2.Timeout = 0;
+ pSMB->t2.Reserved2 = 0;
+ pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req,
+ Fid) - 4);
+ pSMB->t2.DataCount = 0;
+ pSMB->t2.DataOffset = 0;
+ pSMB->t2.SetupCount = 1;
+ pSMB->t2.Reserved3 = 0;
+ pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
+ byte_count = params + 1 /* pad */ ;
+ pSMB->t2.TotalParameterCount = cpu_to_le16(params);
+ pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
+ pSMB->Pad = 0;
+ pSMB->Fid = netfid;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->t2.ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in UnixQFileInfo = %d", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || get_bcc(&pSMBr->hdr) < sizeof(FILE_UNIX_BASIC_INFO)) {
+ cifs_dbg(VFS, "Malformed FILE_UNIX_BASIC_INFO response. Unix Extensions can be disabled on mount by specifying the nosfu mount option.\n");
+ rc = -EIO; /* bad smb */
+ } else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ memcpy((char *) pFindData,
+ (char *) &pSMBr->hdr.Protocol +
+ data_offset,
+ sizeof(FILE_UNIX_BASIC_INFO));
+ }
+ }
+
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto UnixQFileInfoRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBUnixQPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ const unsigned char *searchName,
+ FILE_UNIX_BASIC_INFO *pFindData,
+ const struct nls_table *nls_codepage, int remap)
+{
+/* SMB_QUERY_FILE_UNIX_BASIC */
+ TRANSACTION2_QPI_REQ *pSMB = NULL;
+ TRANSACTION2_QPI_RSP *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned = 0;
+ int name_len;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "In QPathInfo (Unix) the path %s\n", searchName);
+UnixQPathInfoRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName,
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(searchName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, searchName, name_len);
+ }
+
+ params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(4000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in UnixQPathInfo = %d", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || get_bcc(&pSMBr->hdr) < sizeof(FILE_UNIX_BASIC_INFO)) {
+ cifs_dbg(VFS, "Malformed FILE_UNIX_BASIC_INFO response. Unix Extensions can be disabled on mount by specifying the nosfu mount option.\n");
+ rc = -EIO; /* bad smb */
+ } else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ memcpy((char *) pFindData,
+ (char *) &pSMBr->hdr.Protocol +
+ data_offset,
+ sizeof(FILE_UNIX_BASIC_INFO));
+ }
+ }
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto UnixQPathInfoRetry;
+
+ return rc;
+}
+
+/* xid, tcon, searchName and codepage are input parms, rest are returned */
+int
+CIFSFindFirst(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *searchName, struct cifs_sb_info *cifs_sb,
+ __u16 *pnetfid, __u16 search_flags,
+ struct cifs_search_info *psrch_inf, bool msearch)
+{
+/* level 257 SMB_ */
+ TRANSACTION2_FFIRST_REQ *pSMB = NULL;
+ TRANSACTION2_FFIRST_RSP *pSMBr = NULL;
+ T2_FFIRST_RSP_PARMS *parms;
+ int rc = 0;
+ int bytes_returned = 0;
+ int name_len, remap;
+ __u16 params, byte_count;
+ struct nls_table *nls_codepage;
+
+ cifs_dbg(FYI, "In FindFirst for %s\n", searchName);
+
+findFirstRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ nls_codepage = cifs_sb->local_nls;
+ remap = cifs_remap(cifs_sb);
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName,
+ PATH_MAX, nls_codepage, remap);
+ /* We can not add the asterik earlier in case
+ it got remapped to 0xF03A as if it were part of the
+ directory name instead of a wildcard */
+ name_len *= 2;
+ if (msearch) {
+ pSMB->FileName[name_len] = CIFS_DIR_SEP(cifs_sb);
+ pSMB->FileName[name_len+1] = 0;
+ pSMB->FileName[name_len+2] = '*';
+ pSMB->FileName[name_len+3] = 0;
+ name_len += 4; /* now the trailing null */
+ /* null terminate just in case */
+ pSMB->FileName[name_len] = 0;
+ pSMB->FileName[name_len+1] = 0;
+ name_len += 2;
+ }
+ } else { /* BB add check for overrun of SMB buf BB */
+ name_len = strnlen(searchName, PATH_MAX);
+/* BB fix here and in unicode clause above ie
+ if (name_len > buffersize-header)
+ free buffer exit; BB */
+ strncpy(pSMB->FileName, searchName, name_len);
+ if (msearch) {
+ pSMB->FileName[name_len] = CIFS_DIR_SEP(cifs_sb);
+ pSMB->FileName[name_len+1] = '*';
+ pSMB->FileName[name_len+2] = 0;
+ name_len += 3;
+ }
+ }
+
+ params = 12 + name_len /* includes null */ ;
+ pSMB->TotalDataCount = 0; /* no EAs */
+ pSMB->MaxParameterCount = cpu_to_le16(10);
+ pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize & 0xFFFFFF00);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(
+ offsetof(struct smb_com_transaction2_ffirst_req, SearchAttributes)
+ - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1; /* one byte, no need to make endian neutral */
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_FIRST);
+ pSMB->SearchAttributes =
+ cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
+ ATTR_DIRECTORY);
+ pSMB->SearchCount = cpu_to_le16(CIFSMaxBufSize/sizeof(FILE_UNIX_INFO));
+ pSMB->SearchFlags = cpu_to_le16(search_flags);
+ pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
+
+ /* BB what should we set StorageType to? Does it matter? BB */
+ pSMB->SearchStorageType = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_ffirst);
+
+ if (rc) {/* BB add logic to retry regular search if Unix search
+ rejected unexpectedly by server */
+ /* BB Add code to handle unsupported level rc */
+ cifs_dbg(FYI, "Error in FindFirst = %d\n", rc);
+
+ cifs_buf_release(pSMB);
+
+ /* BB eventually could optimize out free and realloc of buf */
+ /* for this case */
+ if (rc == -EAGAIN)
+ goto findFirstRetry;
+ } else { /* decode response */
+ /* BB remember to free buffer if error BB */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+ if (rc == 0) {
+ unsigned int lnoff;
+
+ if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
+ psrch_inf->unicode = true;
+ else
+ psrch_inf->unicode = false;
+
+ psrch_inf->ntwrk_buf_start = (char *)pSMBr;
+ psrch_inf->smallBuf = 0;
+ psrch_inf->srch_entries_start =
+ (char *) &pSMBr->hdr.Protocol +
+ le16_to_cpu(pSMBr->t2.DataOffset);
+ parms = (T2_FFIRST_RSP_PARMS *)((char *) &pSMBr->hdr.Protocol +
+ le16_to_cpu(pSMBr->t2.ParameterOffset));
+
+ if (parms->EndofSearch)
+ psrch_inf->endOfSearch = true;
+ else
+ psrch_inf->endOfSearch = false;
+
+ psrch_inf->entries_in_buffer =
+ le16_to_cpu(parms->SearchCount);
+ psrch_inf->index_of_last_entry = 2 /* skip . and .. */ +
+ psrch_inf->entries_in_buffer;
+ lnoff = le16_to_cpu(parms->LastNameOffset);
+ if (CIFSMaxBufSize < lnoff) {
+ cifs_dbg(VFS, "ignoring corrupt resume name\n");
+ psrch_inf->last_entry = NULL;
+ return rc;
+ }
+
+ psrch_inf->last_entry = psrch_inf->srch_entries_start +
+ lnoff;
+
+ if (pnetfid)
+ *pnetfid = parms->SearchHandle;
+ } else {
+ cifs_buf_release(pSMB);
+ }
+ }
+
+ return rc;
+}
+
+int CIFSFindNext(const unsigned int xid, struct cifs_tcon *tcon,
+ __u16 searchHandle, __u16 search_flags,
+ struct cifs_search_info *psrch_inf)
+{
+ TRANSACTION2_FNEXT_REQ *pSMB = NULL;
+ TRANSACTION2_FNEXT_RSP *pSMBr = NULL;
+ T2_FNEXT_RSP_PARMS *parms;
+ char *response_data;
+ int rc = 0;
+ int bytes_returned;
+ unsigned int name_len;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "In FindNext\n");
+
+ if (psrch_inf->endOfSearch)
+ return -ENOENT;
+
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 14; /* includes 2 bytes of null string, converted to LE below*/
+ byte_count = 0;
+ pSMB->TotalDataCount = 0; /* no EAs */
+ pSMB->MaxParameterCount = cpu_to_le16(8);
+ pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize & 0xFFFFFF00);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ pSMB->ParameterOffset = cpu_to_le16(
+ offsetof(struct smb_com_transaction2_fnext_req,SearchHandle) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_NEXT);
+ pSMB->SearchHandle = searchHandle; /* always kept as le */
+ pSMB->SearchCount =
+ cpu_to_le16(CIFSMaxBufSize / sizeof(FILE_UNIX_INFO));
+ pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
+ pSMB->ResumeKey = psrch_inf->resume_key;
+ pSMB->SearchFlags = cpu_to_le16(search_flags);
+
+ name_len = psrch_inf->resume_name_len;
+ params += name_len;
+ if (name_len < PATH_MAX) {
+ memcpy(pSMB->ResumeFileName, psrch_inf->presume_name, name_len);
+ byte_count += name_len;
+ /* 14 byte parm len above enough for 2 byte null terminator */
+ pSMB->ResumeFileName[name_len] = 0;
+ pSMB->ResumeFileName[name_len+1] = 0;
+ } else {
+ rc = -EINVAL;
+ goto FNext2_err_exit;
+ }
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_fnext);
+ if (rc) {
+ if (rc == -EBADF) {
+ psrch_inf->endOfSearch = true;
+ cifs_buf_release(pSMB);
+ rc = 0; /* search probably was closed at end of search*/
+ } else
+ cifs_dbg(FYI, "FindNext returned = %d\n", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc == 0) {
+ unsigned int lnoff;
+
+ /* BB fixme add lock for file (srch_info) struct here */
+ if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
+ psrch_inf->unicode = true;
+ else
+ psrch_inf->unicode = false;
+ response_data = (char *) &pSMBr->hdr.Protocol +
+ le16_to_cpu(pSMBr->t2.ParameterOffset);
+ parms = (T2_FNEXT_RSP_PARMS *)response_data;
+ response_data = (char *)&pSMBr->hdr.Protocol +
+ le16_to_cpu(pSMBr->t2.DataOffset);
+ if (psrch_inf->smallBuf)
+ cifs_small_buf_release(
+ psrch_inf->ntwrk_buf_start);
+ else
+ cifs_buf_release(psrch_inf->ntwrk_buf_start);
+ psrch_inf->srch_entries_start = response_data;
+ psrch_inf->ntwrk_buf_start = (char *)pSMB;
+ psrch_inf->smallBuf = 0;
+ if (parms->EndofSearch)
+ psrch_inf->endOfSearch = true;
+ else
+ psrch_inf->endOfSearch = false;
+ psrch_inf->entries_in_buffer =
+ le16_to_cpu(parms->SearchCount);
+ psrch_inf->index_of_last_entry +=
+ psrch_inf->entries_in_buffer;
+ lnoff = le16_to_cpu(parms->LastNameOffset);
+ if (CIFSMaxBufSize < lnoff) {
+ cifs_dbg(VFS, "ignoring corrupt resume name\n");
+ psrch_inf->last_entry = NULL;
+ return rc;
+ } else
+ psrch_inf->last_entry =
+ psrch_inf->srch_entries_start + lnoff;
+
+/* cifs_dbg(FYI, "fnxt2 entries in buf %d index_of_last %d\n",
+ psrch_inf->entries_in_buffer, psrch_inf->index_of_last_entry); */
+
+ /* BB fixme add unlock here */
+ }
+
+ }
+
+ /* BB On error, should we leave previous search buf (and count and
+ last entry fields) intact or free the previous one? */
+
+ /* Note: On -EAGAIN error only caller can retry on handle based calls
+ since file handle passed in no longer valid */
+FNext2_err_exit:
+ if (rc != 0)
+ cifs_buf_release(pSMB);
+ return rc;
+}
+
+int
+CIFSFindClose(const unsigned int xid, struct cifs_tcon *tcon,
+ const __u16 searchHandle)
+{
+ int rc = 0;
+ FINDCLOSE_REQ *pSMB = NULL;
+
+ cifs_dbg(FYI, "In CIFSSMBFindClose\n");
+ rc = small_smb_init(SMB_COM_FIND_CLOSE2, 1, tcon, (void **)&pSMB);
+
+ /* no sense returning error if session restarted
+ as file handle has been closed */
+ if (rc == -EAGAIN)
+ return 0;
+ if (rc)
+ return rc;
+
+ pSMB->FileID = searchHandle;
+ pSMB->ByteCount = 0;
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
+ if (rc)
+ cifs_dbg(VFS, "Send error in FindClose = %d\n", rc);
+
+ cifs_stats_inc(&tcon->stats.cifs_stats.num_fclose);
+
+ /* Since session is dead, search handle closed on server already */
+ if (rc == -EAGAIN)
+ rc = 0;
+
+ return rc;
+}
+
+int
+CIFSGetSrvInodeNumber(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *search_name, __u64 *inode_number,
+ const struct nls_table *nls_codepage, int remap)
+{
+ int rc = 0;
+ TRANSACTION2_QPI_REQ *pSMB = NULL;
+ TRANSACTION2_QPI_RSP *pSMBr = NULL;
+ int name_len, bytes_returned;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "In GetSrvInodeNum for %s\n", search_name);
+ if (tcon == NULL)
+ return -ENODEV;
+
+GetInodeNumberRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName,
+ search_name, PATH_MAX, nls_codepage,
+ remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(search_name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, search_name, name_len);
+ }
+
+ params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ;
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max data count below from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(4000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_INTERNAL_INFO);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "error %d in QueryInternalInfo\n", rc);
+ } else {
+ /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+ /* BB also check enough total bytes returned */
+ if (rc || get_bcc(&pSMBr->hdr) < 2)
+ /* If rc should we check for EOPNOSUPP and
+ disable the srvino flag? or in caller? */
+ rc = -EIO; /* bad smb */
+ else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ __u16 count = le16_to_cpu(pSMBr->t2.DataCount);
+ struct file_internal_info *pfinfo;
+ /* BB Do we need a cast or hash here ? */
+ if (count < 8) {
+ cifs_dbg(FYI, "Illegal size ret in QryIntrnlInf\n");
+ rc = -EIO;
+ goto GetInodeNumOut;
+ }
+ pfinfo = (struct file_internal_info *)
+ (data_offset + (char *) &pSMBr->hdr.Protocol);
+ *inode_number = le64_to_cpu(pfinfo->UniqueId);
+ }
+ }
+GetInodeNumOut:
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto GetInodeNumberRetry;
+ return rc;
+}
+
+int
+CIFSGetDFSRefer(const unsigned int xid, struct cifs_ses *ses,
+ const char *search_name, struct dfs_info3_param **target_nodes,
+ unsigned int *num_of_nodes,
+ const struct nls_table *nls_codepage, int remap)
+{
+/* TRANS2_GET_DFS_REFERRAL */
+ TRANSACTION2_GET_DFS_REFER_REQ *pSMB = NULL;
+ TRANSACTION2_GET_DFS_REFER_RSP *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned;
+ int name_len;
+ __u16 params, byte_count;
+ *num_of_nodes = 0;
+ *target_nodes = NULL;
+
+ cifs_dbg(FYI, "In GetDFSRefer the path %s\n", search_name);
+ if (ses == NULL)
+ return -ENODEV;
+getDFSRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, NULL, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ /* server pointer checked in called function,
+ but should never be null here anyway */
+ pSMB->hdr.Mid = get_next_mid(ses->server);
+ pSMB->hdr.Tid = ses->ipc_tid;
+ pSMB->hdr.Uid = ses->Suid;
+ if (ses->capabilities & CAP_STATUS32)
+ pSMB->hdr.Flags2 |= SMBFLG2_ERR_STATUS;
+ if (ses->capabilities & CAP_DFS)
+ pSMB->hdr.Flags2 |= SMBFLG2_DFS;
+
+ if (ses->capabilities & CAP_UNICODE) {
+ pSMB->hdr.Flags2 |= SMBFLG2_UNICODE;
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->RequestFileName,
+ search_name, PATH_MAX, nls_codepage,
+ remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(search_name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->RequestFileName, search_name, name_len);
+ }
+
+ if (ses->server->sign)
+ pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+
+ pSMB->hdr.Uid = ses->Suid;
+
+ params = 2 /* level */ + name_len /*includes null */ ;
+ pSMB->TotalDataCount = 0;
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->MaxParameterCount = 0;
+ /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(4000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_get_dfs_refer_req, MaxReferralLevel) - 4);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_GET_DFS_REFERRAL);
+ byte_count = params + 3 /* pad */ ;
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->MaxReferralLevel = cpu_to_le16(3);
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in GetDFSRefer = %d\n", rc);
+ goto GetDFSRefExit;
+ }
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ /* BB Also check if enough total bytes returned? */
+ if (rc || get_bcc(&pSMBr->hdr) < 17) {
+ rc = -EIO; /* bad smb */
+ goto GetDFSRefExit;
+ }
+
+ cifs_dbg(FYI, "Decoding GetDFSRefer response BCC: %d Offset %d\n",
+ get_bcc(&pSMBr->hdr), le16_to_cpu(pSMBr->t2.DataOffset));
+
+ /* parse returned result into more usable form */
+ rc = parse_dfs_referrals(&pSMBr->dfs_data,
+ le16_to_cpu(pSMBr->t2.DataCount),
+ num_of_nodes, target_nodes, nls_codepage,
+ remap, search_name,
+ (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) != 0);
+
+GetDFSRefExit:
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto getDFSRetry;
+
+ return rc;
+}
+
+/* Query File System Info such as free space to old servers such as Win 9x */
+int
+SMBOldQFSInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ struct kstatfs *FSData)
+{
+/* level 0x01 SMB_QUERY_FILE_SYSTEM_INFO */
+ TRANSACTION2_QFSI_REQ *pSMB = NULL;
+ TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+ FILE_SYSTEM_ALLOC_INFO *response_data;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "OldQFSInfo\n");
+oldQFSInfoRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2; /* level */
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+ pSMB->InformationLevel = cpu_to_le16(SMB_INFO_ALLOCATION);
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QFSInfo = %d\n", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || get_bcc(&pSMBr->hdr) < 18)
+ rc = -EIO; /* bad smb */
+ else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ cifs_dbg(FYI, "qfsinf resp BCC: %d Offset %d\n",
+ get_bcc(&pSMBr->hdr), data_offset);
+
+ response_data = (FILE_SYSTEM_ALLOC_INFO *)
+ (((char *) &pSMBr->hdr.Protocol) + data_offset);
+ FSData->f_bsize =
+ le16_to_cpu(response_data->BytesPerSector) *
+ le32_to_cpu(response_data->
+ SectorsPerAllocationUnit);
+ FSData->f_blocks =
+ le32_to_cpu(response_data->TotalAllocationUnits);
+ FSData->f_bfree = FSData->f_bavail =
+ le32_to_cpu(response_data->FreeAllocationUnits);
+ cifs_dbg(FYI, "Blocks: %lld Free: %lld Block size %ld\n",
+ (unsigned long long)FSData->f_blocks,
+ (unsigned long long)FSData->f_bfree,
+ FSData->f_bsize);
+ }
+ }
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto oldQFSInfoRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBQFSInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ struct kstatfs *FSData)
+{
+/* level 0x103 SMB_QUERY_FILE_SYSTEM_INFO */
+ TRANSACTION2_QFSI_REQ *pSMB = NULL;
+ TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+ FILE_SYSTEM_INFO *response_data;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "In QFSInfo\n");
+QFSInfoRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2; /* level */
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_SIZE_INFO);
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QFSInfo = %d\n", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || get_bcc(&pSMBr->hdr) < 24)
+ rc = -EIO; /* bad smb */
+ else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+
+ response_data =
+ (FILE_SYSTEM_INFO
+ *) (((char *) &pSMBr->hdr.Protocol) +
+ data_offset);
+ FSData->f_bsize =
+ le32_to_cpu(response_data->BytesPerSector) *
+ le32_to_cpu(response_data->
+ SectorsPerAllocationUnit);
+ FSData->f_blocks =
+ le64_to_cpu(response_data->TotalAllocationUnits);
+ FSData->f_bfree = FSData->f_bavail =
+ le64_to_cpu(response_data->FreeAllocationUnits);
+ cifs_dbg(FYI, "Blocks: %lld Free: %lld Block size %ld\n",
+ (unsigned long long)FSData->f_blocks,
+ (unsigned long long)FSData->f_bfree,
+ FSData->f_bsize);
+ }
+ }
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto QFSInfoRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBQFSAttributeInfo(const unsigned int xid, struct cifs_tcon *tcon)
+{
+/* level 0x105 SMB_QUERY_FILE_SYSTEM_INFO */
+ TRANSACTION2_QFSI_REQ *pSMB = NULL;
+ TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+ FILE_SYSTEM_ATTRIBUTE_INFO *response_data;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "In QFSAttributeInfo\n");
+QFSAttributeRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2; /* level */
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_ATTRIBUTE_INFO);
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(VFS, "Send error in QFSAttributeInfo = %d\n", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || get_bcc(&pSMBr->hdr) < 13) {
+ /* BB also check if enough bytes returned */
+ rc = -EIO; /* bad smb */
+ } else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ response_data =
+ (FILE_SYSTEM_ATTRIBUTE_INFO
+ *) (((char *) &pSMBr->hdr.Protocol) +
+ data_offset);
+ memcpy(&tcon->fsAttrInfo, response_data,
+ sizeof(FILE_SYSTEM_ATTRIBUTE_INFO));
+ }
+ }
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto QFSAttributeRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBQFSDeviceInfo(const unsigned int xid, struct cifs_tcon *tcon)
+{
+/* level 0x104 SMB_QUERY_FILE_SYSTEM_INFO */
+ TRANSACTION2_QFSI_REQ *pSMB = NULL;
+ TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+ FILE_SYSTEM_DEVICE_INFO *response_data;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "In QFSDeviceInfo\n");
+QFSDeviceRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2; /* level */
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_DEVICE_INFO);
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QFSDeviceInfo = %d\n", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || get_bcc(&pSMBr->hdr) <
+ sizeof(FILE_SYSTEM_DEVICE_INFO))
+ rc = -EIO; /* bad smb */
+ else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ response_data =
+ (FILE_SYSTEM_DEVICE_INFO *)
+ (((char *) &pSMBr->hdr.Protocol) +
+ data_offset);
+ memcpy(&tcon->fsDevInfo, response_data,
+ sizeof(FILE_SYSTEM_DEVICE_INFO));
+ }
+ }
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto QFSDeviceRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBQFSUnixInfo(const unsigned int xid, struct cifs_tcon *tcon)
+{
+/* level 0x200 SMB_QUERY_CIFS_UNIX_INFO */
+ TRANSACTION2_QFSI_REQ *pSMB = NULL;
+ TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+ FILE_SYSTEM_UNIX_INFO *response_data;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "In QFSUnixInfo\n");
+QFSUnixRetry:
+ rc = smb_init_no_reconnect(SMB_COM_TRANSACTION2, 15, tcon,
+ (void **) &pSMB, (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2; /* level */
+ pSMB->TotalDataCount = 0;
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(100);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ byte_count = params + 1 /* pad */ ;
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(struct
+ smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_CIFS_UNIX_INFO);
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(VFS, "Send error in QFSUnixInfo = %d\n", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || get_bcc(&pSMBr->hdr) < 13) {
+ rc = -EIO; /* bad smb */
+ } else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ response_data =
+ (FILE_SYSTEM_UNIX_INFO
+ *) (((char *) &pSMBr->hdr.Protocol) +
+ data_offset);
+ memcpy(&tcon->fsUnixInfo, response_data,
+ sizeof(FILE_SYSTEM_UNIX_INFO));
+ }
+ }
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto QFSUnixRetry;
+
+
+ return rc;
+}
+
+int
+CIFSSMBSetFSUnixInfo(const unsigned int xid, struct cifs_tcon *tcon, __u64 cap)
+{
+/* level 0x200 SMB_SET_CIFS_UNIX_INFO */
+ TRANSACTION2_SETFSI_REQ *pSMB = NULL;
+ TRANSACTION2_SETFSI_RSP *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, param_offset, offset, byte_count;
+
+ cifs_dbg(FYI, "In SETFSUnixInfo\n");
+SETFSUnixRetry:
+ /* BB switch to small buf init to save memory */
+ rc = smb_init_no_reconnect(SMB_COM_TRANSACTION2, 15, tcon,
+ (void **) &pSMB, (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 4; /* 2 bytes zero followed by info level. */
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_setfsi_req, FileNum)
+ - 4;
+ offset = param_offset + params;
+
+ pSMB->MaxParameterCount = cpu_to_le16(4);
+ /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(100);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FS_INFORMATION);
+ byte_count = 1 /* pad */ + params + 12;
+
+ pSMB->DataCount = cpu_to_le16(12);
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+
+ /* Params. */
+ pSMB->FileNum = 0;
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_CIFS_UNIX_INFO);
+
+ /* Data. */
+ pSMB->ClientUnixMajor = cpu_to_le16(CIFS_UNIX_MAJOR_VERSION);
+ pSMB->ClientUnixMinor = cpu_to_le16(CIFS_UNIX_MINOR_VERSION);
+ pSMB->ClientUnixCap = cpu_to_le64(cap);
+
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(VFS, "Send error in SETFSUnixInfo = %d\n", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+ if (rc)
+ rc = -EIO; /* bad smb */
+ }
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto SETFSUnixRetry;
+
+ return rc;
+}
+
+
+
+int
+CIFSSMBQFSPosixInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ struct kstatfs *FSData)
+{
+/* level 0x201 SMB_QUERY_CIFS_POSIX_INFO */
+ TRANSACTION2_QFSI_REQ *pSMB = NULL;
+ TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+ FILE_SYSTEM_POSIX_INFO *response_data;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, byte_count;
+
+ cifs_dbg(FYI, "In QFSPosixInfo\n");
+QFSPosixRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2; /* level */
+ pSMB->TotalDataCount = 0;
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(100);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ byte_count = params + 1 /* pad */ ;
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(struct
+ smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+ pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_FS_INFO);
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QFSUnixInfo = %d\n", rc);
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || get_bcc(&pSMBr->hdr) < 13) {
+ rc = -EIO; /* bad smb */
+ } else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ response_data =
+ (FILE_SYSTEM_POSIX_INFO
+ *) (((char *) &pSMBr->hdr.Protocol) +
+ data_offset);
+ FSData->f_bsize =
+ le32_to_cpu(response_data->BlockSize);
+ FSData->f_blocks =
+ le64_to_cpu(response_data->TotalBlocks);
+ FSData->f_bfree =
+ le64_to_cpu(response_data->BlocksAvail);
+ if (response_data->UserBlocksAvail == cpu_to_le64(-1)) {
+ FSData->f_bavail = FSData->f_bfree;
+ } else {
+ FSData->f_bavail =
+ le64_to_cpu(response_data->UserBlocksAvail);
+ }
+ if (response_data->TotalFileNodes != cpu_to_le64(-1))
+ FSData->f_files =
+ le64_to_cpu(response_data->TotalFileNodes);
+ if (response_data->FreeFileNodes != cpu_to_le64(-1))
+ FSData->f_ffree =
+ le64_to_cpu(response_data->FreeFileNodes);
+ }
+ }
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto QFSPosixRetry;
+
+ return rc;
+}
+
+
+/*
+ * We can not use write of zero bytes trick to set file size due to need for
+ * large file support. Also note that this SetPathInfo is preferred to
+ * SetFileInfo based method in next routine which is only needed to work around
+ * a sharing violation bugin Samba which this routine can run into.
+ */
+int
+CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *file_name, __u64 size, struct cifs_sb_info *cifs_sb,
+ bool set_allocation)
+{
+ struct smb_com_transaction2_spi_req *pSMB = NULL;
+ struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
+ struct file_end_of_file_info *parm_data;
+ int name_len;
+ int rc = 0;
+ int bytes_returned = 0;
+ int remap = cifs_remap(cifs_sb);
+
+ __u16 params, byte_count, data_count, param_offset, offset;
+
+ cifs_dbg(FYI, "In SetEOF\n");
+SetEOFRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, file_name,
+ PATH_MAX, cifs_sb->local_nls, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(file_name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, file_name, name_len);
+ }
+ params = 6 + name_len;
+ data_count = sizeof(struct file_end_of_file_info);
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ pSMB->MaxDataCount = cpu_to_le16(4100);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_spi_req,
+ InformationLevel) - 4;
+ offset = param_offset + params;
+ if (set_allocation) {
+ if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+ pSMB->InformationLevel =
+ cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2);
+ else
+ pSMB->InformationLevel =
+ cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO);
+ } else /* Set File Size */ {
+ if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+ pSMB->InformationLevel =
+ cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO2);
+ else
+ pSMB->InformationLevel =
+ cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO);
+ }
+
+ parm_data =
+ (struct file_end_of_file_info *) (((char *) &pSMB->hdr.Protocol) +
+ offset);
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+ byte_count = 3 /* pad */ + params + data_count;
+ pSMB->DataCount = cpu_to_le16(data_count);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ parm_data->FileSize = cpu_to_le64(size);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc)
+ cifs_dbg(FYI, "SetPathInfo (file size) returned %d\n", rc);
+
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto SetEOFRetry;
+
+ return rc;
+}
+
+int
+CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifsFileInfo *cfile, __u64 size, bool set_allocation)
+{
+ struct smb_com_transaction2_sfi_req *pSMB = NULL;
+ struct file_end_of_file_info *parm_data;
+ int rc = 0;
+ __u16 params, param_offset, offset, byte_count, count;
+
+ cifs_dbg(FYI, "SetFileSize (via SetFileInfo) %lld\n",
+ (long long)size);
+ rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+ if (rc)
+ return rc;
+
+ pSMB->hdr.Pid = cpu_to_le16((__u16)cfile->pid);
+ pSMB->hdr.PidHigh = cpu_to_le16((__u16)(cfile->pid >> 16));
+
+ params = 6;
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+ offset = param_offset + params;
+
+ count = sizeof(struct file_end_of_file_info);
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+ byte_count = 3 /* pad */ + params + count;
+ pSMB->DataCount = cpu_to_le16(count);
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ parm_data =
+ (struct file_end_of_file_info *) (((char *) &pSMB->hdr.Protocol)
+ + offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ parm_data->FileSize = cpu_to_le64(size);
+ pSMB->Fid = cfile->fid.netfid;
+ if (set_allocation) {
+ if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+ pSMB->InformationLevel =
+ cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2);
+ else
+ pSMB->InformationLevel =
+ cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO);
+ } else /* Set File Size */ {
+ if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+ pSMB->InformationLevel =
+ cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO2);
+ else
+ pSMB->InformationLevel =
+ cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO);
+ }
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in SetFileInfo (SetFileSize) = %d\n",
+ rc);
+ }
+
+ /* Note: On -EAGAIN error only caller can retry on handle based calls
+ since file handle passed in no longer valid */
+
+ return rc;
+}
+
+/* Some legacy servers such as NT4 require that the file times be set on
+ an open handle, rather than by pathname - this is awkward due to
+ potential access conflicts on the open, but it is unavoidable for these
+ old servers since the only other choice is to go from 100 nanosecond DCE
+ time and resort to the original setpathinfo level which takes the ancient
+ DOS time format with 2 second granularity */
+int
+CIFSSMBSetFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ const FILE_BASIC_INFO *data, __u16 fid, __u32 pid_of_opener)
+{
+ struct smb_com_transaction2_sfi_req *pSMB = NULL;
+ char *data_offset;
+ int rc = 0;
+ __u16 params, param_offset, offset, byte_count, count;
+
+ cifs_dbg(FYI, "Set Times (via SetFileInfo)\n");
+ rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+ if (rc)
+ return rc;
+
+ pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener);
+ pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16));
+
+ params = 6;
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+ offset = param_offset + params;
+
+ data_offset = (char *)pSMB +
+ offsetof(struct smb_hdr, Protocol) + offset;
+
+ count = sizeof(FILE_BASIC_INFO);
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find max SMB PDU from sess */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+ byte_count = 3 /* pad */ + params + count;
+ pSMB->DataCount = cpu_to_le16(count);
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->Fid = fid;
+ if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO2);
+ else
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ memcpy(data_offset, data, sizeof(FILE_BASIC_INFO));
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
+ if (rc)
+ cifs_dbg(FYI, "Send error in Set Time (SetFileInfo) = %d\n",
+ rc);
+
+ /* Note: On -EAGAIN error only caller can retry on handle based calls
+ since file handle passed in no longer valid */
+
+ return rc;
+}
+
+int
+CIFSSMBSetFileDisposition(const unsigned int xid, struct cifs_tcon *tcon,
+ bool delete_file, __u16 fid, __u32 pid_of_opener)
+{
+ struct smb_com_transaction2_sfi_req *pSMB = NULL;
+ char *data_offset;
+ int rc = 0;
+ __u16 params, param_offset, offset, byte_count, count;
+
+ cifs_dbg(FYI, "Set File Disposition (via SetFileInfo)\n");
+ rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+ if (rc)
+ return rc;
+
+ pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener);
+ pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16));
+
+ params = 6;
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+ offset = param_offset + params;
+
+ data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
+
+ count = 1;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find max SMB PDU from sess */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+ byte_count = 3 /* pad */ + params + count;
+ pSMB->DataCount = cpu_to_le16(count);
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->Fid = fid;
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_DISPOSITION_INFO);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ *data_offset = delete_file ? 1 : 0;
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
+ if (rc)
+ cifs_dbg(FYI, "Send error in SetFileDisposition = %d\n", rc);
+
+ return rc;
+}
+
+int
+CIFSSMBSetPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *fileName, const FILE_BASIC_INFO *data,
+ const struct nls_table *nls_codepage, int remap)
+{
+ TRANSACTION2_SPI_REQ *pSMB = NULL;
+ TRANSACTION2_SPI_RSP *pSMBr = NULL;
+ int name_len;
+ int rc = 0;
+ int bytes_returned = 0;
+ char *data_offset;
+ __u16 params, param_offset, offset, byte_count, count;
+
+ cifs_dbg(FYI, "In SetTimes\n");
+
+SetTimesRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName,
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(fileName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, fileName, name_len);
+ }
+
+ params = 6 + name_len;
+ count = sizeof(FILE_BASIC_INFO);
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_spi_req,
+ InformationLevel) - 4;
+ offset = param_offset + params;
+ data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+ byte_count = 3 /* pad */ + params + count;
+
+ pSMB->DataCount = cpu_to_le16(count);
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO2);
+ else
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ memcpy(data_offset, data, sizeof(FILE_BASIC_INFO));
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc)
+ cifs_dbg(FYI, "SetPathInfo (times) returned %d\n", rc);
+
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto SetTimesRetry;
+
+ return rc;
+}
+
+/* Can not be used to set time stamps yet (due to old DOS time format) */
+/* Can be used to set attributes */
+#if 0 /* Possibly not needed - since it turns out that strangely NT4 has a bug
+ handling it anyway and NT4 was what we thought it would be needed for
+ Do not delete it until we prove whether needed for Win9x though */
+int
+CIFSSMBSetAttrLegacy(unsigned int xid, struct cifs_tcon *tcon, char *fileName,
+ __u16 dos_attrs, const struct nls_table *nls_codepage)
+{
+ SETATTR_REQ *pSMB = NULL;
+ SETATTR_RSP *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned;
+ int name_len;
+
+ cifs_dbg(FYI, "In SetAttrLegacy\n");
+
+SetAttrLgcyRetry:
+ rc = smb_init(SMB_COM_SETATTR, 8, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ ConvertToUTF16((__le16 *) pSMB->fileName, fileName,
+ PATH_MAX, nls_codepage);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(fileName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->fileName, fileName, name_len);
+ }
+ pSMB->attr = cpu_to_le16(dos_attrs);
+ pSMB->BufferFormat = 0x04;
+ inc_rfc1001_len(pSMB, name_len + 1);
+ pSMB->ByteCount = cpu_to_le16(name_len + 1);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc)
+ cifs_dbg(FYI, "Error in LegacySetAttr = %d\n", rc);
+
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto SetAttrLgcyRetry;
+
+ return rc;
+}
+#endif /* temporarily unneeded SetAttr legacy function */
+
+static void
+cifs_fill_unix_set_info(FILE_UNIX_BASIC_INFO *data_offset,
+ const struct cifs_unix_set_info_args *args)
+{
+ u64 uid = NO_CHANGE_64, gid = NO_CHANGE_64;
+ u64 mode = args->mode;
+
+ if (uid_valid(args->uid))
+ uid = from_kuid(&init_user_ns, args->uid);
+ if (gid_valid(args->gid))
+ gid = from_kgid(&init_user_ns, args->gid);
+
+ /*
+ * Samba server ignores set of file size to zero due to bugs in some
+ * older clients, but we should be precise - we use SetFileSize to
+ * set file size and do not want to truncate file size to zero
+ * accidentally as happened on one Samba server beta by putting
+ * zero instead of -1 here
+ */
+ data_offset->EndOfFile = cpu_to_le64(NO_CHANGE_64);
+ data_offset->NumOfBytes = cpu_to_le64(NO_CHANGE_64);
+ data_offset->LastStatusChange = cpu_to_le64(args->ctime);
+ data_offset->LastAccessTime = cpu_to_le64(args->atime);
+ data_offset->LastModificationTime = cpu_to_le64(args->mtime);
+ data_offset->Uid = cpu_to_le64(uid);
+ data_offset->Gid = cpu_to_le64(gid);
+ /* better to leave device as zero when it is */
+ data_offset->DevMajor = cpu_to_le64(MAJOR(args->device));
+ data_offset->DevMinor = cpu_to_le64(MINOR(args->device));
+ data_offset->Permissions = cpu_to_le64(mode);
+
+ if (S_ISREG(mode))
+ data_offset->Type = cpu_to_le32(UNIX_FILE);
+ else if (S_ISDIR(mode))
+ data_offset->Type = cpu_to_le32(UNIX_DIR);
+ else if (S_ISLNK(mode))
+ data_offset->Type = cpu_to_le32(UNIX_SYMLINK);
+ else if (S_ISCHR(mode))
+ data_offset->Type = cpu_to_le32(UNIX_CHARDEV);
+ else if (S_ISBLK(mode))
+ data_offset->Type = cpu_to_le32(UNIX_BLOCKDEV);
+ else if (S_ISFIFO(mode))
+ data_offset->Type = cpu_to_le32(UNIX_FIFO);
+ else if (S_ISSOCK(mode))
+ data_offset->Type = cpu_to_le32(UNIX_SOCKET);
+}
+
+int
+CIFSSMBUnixSetFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ const struct cifs_unix_set_info_args *args,
+ u16 fid, u32 pid_of_opener)
+{
+ struct smb_com_transaction2_sfi_req *pSMB = NULL;
+ char *data_offset;
+ int rc = 0;
+ u16 params, param_offset, offset, byte_count, count;
+
+ cifs_dbg(FYI, "Set Unix Info (via SetFileInfo)\n");
+ rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+ if (rc)
+ return rc;
+
+ pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener);
+ pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16));
+
+ params = 6;
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+ offset = param_offset + params;
+
+ data_offset = (char *)pSMB +
+ offsetof(struct smb_hdr, Protocol) + offset;
+
+ count = sizeof(FILE_UNIX_BASIC_INFO);
+
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find max SMB PDU from sess */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+ byte_count = 3 /* pad */ + params + count;
+ pSMB->DataCount = cpu_to_le16(count);
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->Fid = fid;
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_BASIC);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ cifs_fill_unix_set_info((FILE_UNIX_BASIC_INFO *)data_offset, args);
+
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+ cifs_small_buf_release(pSMB);
+ if (rc)
+ cifs_dbg(FYI, "Send error in Set Time (SetFileInfo) = %d\n",
+ rc);
+
+ /* Note: On -EAGAIN error only caller can retry on handle based calls
+ since file handle passed in no longer valid */
+
+ return rc;
+}
+
+int
+CIFSSMBUnixSetPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *file_name,
+ const struct cifs_unix_set_info_args *args,
+ const struct nls_table *nls_codepage, int remap)
+{
+ TRANSACTION2_SPI_REQ *pSMB = NULL;
+ TRANSACTION2_SPI_RSP *pSMBr = NULL;
+ int name_len;
+ int rc = 0;
+ int bytes_returned = 0;
+ FILE_UNIX_BASIC_INFO *data_offset;
+ __u16 params, param_offset, offset, count, byte_count;
+
+ cifs_dbg(FYI, "In SetUID/GID/Mode\n");
+setPermsRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, file_name,
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(file_name, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, file_name, name_len);
+ }
+
+ params = 6 + name_len;
+ count = sizeof(FILE_UNIX_BASIC_INFO);
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_spi_req,
+ InformationLevel) - 4;
+ offset = param_offset + params;
+ data_offset =
+ (FILE_UNIX_BASIC_INFO *) ((char *) &pSMB->hdr.Protocol +
+ offset);
+ memset(data_offset, 0, count);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+ byte_count = 3 /* pad */ + params + count;
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->DataCount = cpu_to_le16(count);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_BASIC);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+
+ cifs_fill_unix_set_info(data_offset, args);
+
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc)
+ cifs_dbg(FYI, "SetPathInfo (perms) returned %d\n", rc);
+
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto setPermsRetry;
+ return rc;
+}
+
+#ifdef CONFIG_CIFS_XATTR
+/*
+ * Do a path-based QUERY_ALL_EAS call and parse the result. This is a common
+ * function used by listxattr and getxattr type calls. When ea_name is set,
+ * it looks for that attribute name and stuffs that value into the EAData
+ * buffer. When ea_name is NULL, it stuffs a list of attribute names into the
+ * buffer. In both cases, the return value is either the length of the
+ * resulting data or a negative error code. If EAData is a NULL pointer then
+ * the data isn't copied to it, but the length is returned.
+ */
+ssize_t
+CIFSSMBQAllEAs(const unsigned int xid, struct cifs_tcon *tcon,
+ const unsigned char *searchName, const unsigned char *ea_name,
+ char *EAData, size_t buf_size,
+ struct cifs_sb_info *cifs_sb)
+{
+ /* BB assumes one setup word */
+ TRANSACTION2_QPI_REQ *pSMB = NULL;
+ TRANSACTION2_QPI_RSP *pSMBr = NULL;
+ int remap = cifs_remap(cifs_sb);
+ struct nls_table *nls_codepage = cifs_sb->local_nls;
+ int rc = 0;
+ int bytes_returned;
+ int list_len;
+ struct fealist *ea_response_data;
+ struct fea *temp_fea;
+ char *temp_ptr;
+ char *end_of_smb;
+ __u16 params, byte_count, data_offset;
+ unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
+
+ cifs_dbg(FYI, "In Query All EAs path %s\n", searchName);
+QAllEAsRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ list_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName,
+ PATH_MAX, nls_codepage, remap);
+ list_len++; /* trailing null */
+ list_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ list_len = strnlen(searchName, PATH_MAX);
+ list_len++; /* trailing null */
+ strncpy(pSMB->FileName, searchName, list_len);
+ }
+
+ params = 2 /* level */ + 4 /* reserved */ + list_len /* includes NUL */;
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->InformationLevel = cpu_to_le16(SMB_INFO_QUERY_ALL_EAS);
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cifs_dbg(FYI, "Send error in QueryAllEAs = %d\n", rc);
+ goto QAllEAsOut;
+ }
+
+
+ /* BB also check enough total bytes returned */
+ /* BB we need to improve the validity checking
+ of these trans2 responses */
+
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+ if (rc || get_bcc(&pSMBr->hdr) < 4) {
+ rc = -EIO; /* bad smb */
+ goto QAllEAsOut;
+ }
+
+ /* check that length of list is not more than bcc */
+ /* check that each entry does not go beyond length
+ of list */
+ /* check that each element of each entry does not
+ go beyond end of list */
+ /* validate_trans2_offsets() */
+ /* BB check if start of smb + data_offset > &bcc+ bcc */
+
+ data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ ea_response_data = (struct fealist *)
+ (((char *) &pSMBr->hdr.Protocol) + data_offset);
+
+ list_len = le32_to_cpu(ea_response_data->list_len);
+ cifs_dbg(FYI, "ea length %d\n", list_len);
+ if (list_len <= 8) {
+ cifs_dbg(FYI, "empty EA list returned from server\n");
+ /* didn't find the named attribute */
+ if (ea_name)
+ rc = -ENODATA;
+ goto QAllEAsOut;
+ }
+
+ /* make sure list_len doesn't go past end of SMB */
+ end_of_smb = (char *)pByteArea(&pSMBr->hdr) + get_bcc(&pSMBr->hdr);
+ if ((char *)ea_response_data + list_len > end_of_smb) {
+ cifs_dbg(FYI, "EA list appears to go beyond SMB\n");
+ rc = -EIO;
+ goto QAllEAsOut;
+ }
+
+ /* account for ea list len */
+ list_len -= 4;
+ temp_fea = ea_response_data->list;
+ temp_ptr = (char *)temp_fea;
+ while (list_len > 0) {
+ unsigned int name_len;
+ __u16 value_len;
+
+ list_len -= 4;
+ temp_ptr += 4;
+ /* make sure we can read name_len and value_len */
+ if (list_len < 0) {
+ cifs_dbg(FYI, "EA entry goes beyond length of list\n");
+ rc = -EIO;
+ goto QAllEAsOut;
+ }
+
+ name_len = temp_fea->name_len;
+ value_len = le16_to_cpu(temp_fea->value_len);
+ list_len -= name_len + 1 + value_len;
+ if (list_len < 0) {
+ cifs_dbg(FYI, "EA entry goes beyond length of list\n");
+ rc = -EIO;
+ goto QAllEAsOut;
+ }
+
+ if (ea_name) {
+ if (ea_name_len == name_len &&
+ memcmp(ea_name, temp_ptr, name_len) == 0) {
+ temp_ptr += name_len + 1;
+ rc = value_len;
+ if (buf_size == 0)
+ goto QAllEAsOut;
+ if ((size_t)value_len > buf_size) {
+ rc = -ERANGE;
+ goto QAllEAsOut;
+ }
+ memcpy(EAData, temp_ptr, value_len);
+ goto QAllEAsOut;
+ }
+ } else {
+ /* account for prefix user. and trailing null */
+ rc += (5 + 1 + name_len);
+ if (rc < (int) buf_size) {
+ memcpy(EAData, "user.", 5);
+ EAData += 5;
+ memcpy(EAData, temp_ptr, name_len);
+ EAData += name_len;
+ /* null terminate name */
+ *EAData = 0;
+ ++EAData;
+ } else if (buf_size == 0) {
+ /* skip copy - calc size only */
+ } else {
+ /* stop before overrun buffer */
+ rc = -ERANGE;
+ break;
+ }
+ }
+ temp_ptr += name_len + 1 + value_len;
+ temp_fea = (struct fea *)temp_ptr;
+ }
+
+ /* didn't find the named attribute */
+ if (ea_name)
+ rc = -ENODATA;
+
+QAllEAsOut:
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto QAllEAsRetry;
+
+ return (ssize_t)rc;
+}
+
+int
+CIFSSMBSetEA(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *fileName, const char *ea_name, const void *ea_value,
+ const __u16 ea_value_len, const struct nls_table *nls_codepage,
+ struct cifs_sb_info *cifs_sb)
+{
+ struct smb_com_transaction2_spi_req *pSMB = NULL;
+ struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
+ struct fealist *parm_data;
+ int name_len;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, param_offset, byte_count, offset, count;
+ int remap = cifs_remap(cifs_sb);
+
+ cifs_dbg(FYI, "In SetEA\n");
+SetEARetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName,
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve the check for buffer overruns BB */
+ name_len = strnlen(fileName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, fileName, name_len);
+ }
+
+ params = 6 + name_len;
+
+ /* done calculating parms using name_len of file name,
+ now use name_len to calculate length of ea name
+ we are going to create in the inode xattrs */
+ if (ea_name == NULL)
+ name_len = 0;
+ else
+ name_len = strnlen(ea_name, 255);
+
+ count = sizeof(*parm_data) + ea_value_len + name_len;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ /* BB find max SMB PDU from sess */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_spi_req,
+ InformationLevel) - 4;
+ offset = param_offset + params;
+ pSMB->InformationLevel =
+ cpu_to_le16(SMB_SET_FILE_EA);
+
+ parm_data = (void *)pSMB + offsetof(struct smb_hdr, Protocol) + offset;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+ byte_count = 3 /* pad */ + params + count;
+ pSMB->DataCount = cpu_to_le16(count);
+ parm_data->list_len = cpu_to_le32(count);
+ parm_data->list[0].EA_flags = 0;
+ /* we checked above that name len is less than 255 */
+ parm_data->list[0].name_len = (__u8)name_len;
+ /* EA names are always ASCII */
+ if (ea_name)
+ strncpy(parm_data->list[0].name, ea_name, name_len);
+ parm_data->list[0].name[name_len] = 0;
+ parm_data->list[0].value_len = cpu_to_le16(ea_value_len);
+ /* caller ensures that ea_value_len is less than 64K but
+ we need to ensure that it fits within the smb */
+
+ /*BB add length check to see if it would fit in
+ negotiated SMB buffer size BB */
+ /* if (ea_value_len > buffer_size - 512 (enough for header)) */
+ if (ea_value_len)
+ memcpy(parm_data->list[0].name+name_len+1,
+ ea_value, ea_value_len);
+
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->Reserved4 = 0;
+ inc_rfc1001_len(pSMB, byte_count);
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc)
+ cifs_dbg(FYI, "SetPathInfo (EA) returned %d\n", rc);
+
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto SetEARetry;
+
+ return rc;
+}
+#endif
+
+#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* BB unused temporarily */
+/*
+ * Years ago the kernel added a "dnotify" function for Samba server,
+ * to allow network clients (such as Windows) to display updated
+ * lists of files in directory listings automatically when
+ * files are added by one user when another user has the
+ * same directory open on their desktop. The Linux cifs kernel
+ * client hooked into the kernel side of this interface for
+ * the same reason, but ironically when the VFS moved from
+ * "dnotify" to "inotify" it became harder to plug in Linux
+ * network file system clients (the most obvious use case
+ * for notify interfaces is when multiple users can update
+ * the contents of the same directory - exactly what network
+ * file systems can do) although the server (Samba) could
+ * still use it. For the short term we leave the worker
+ * function ifdeffed out (below) until inotify is fixed
+ * in the VFS to make it easier to plug in network file
+ * system clients. If inotify turns out to be permanently
+ * incompatible for network fs clients, we could instead simply
+ * expose this config flag by adding a future cifs (and smb2) notify ioctl.
+ */
+int CIFSSMBNotify(const unsigned int xid, struct cifs_tcon *tcon,
+ const int notify_subdirs, const __u16 netfid,
+ __u32 filter, struct file *pfile, int multishot,
+ const struct nls_table *nls_codepage)
+{
+ int rc = 0;
+ struct smb_com_transaction_change_notify_req *pSMB = NULL;
+ struct smb_com_ntransaction_change_notify_rsp *pSMBr = NULL;
+ struct dir_notify_req *dnotify_req;
+ int bytes_returned;
+
+ cifs_dbg(FYI, "In CIFSSMBNotify for file handle %d\n", (int)netfid);
+ rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->TotalParameterCount = 0 ;
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le32(2);
+ pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00);
+ pSMB->MaxSetupCount = 4;
+ pSMB->Reserved = 0;
+ pSMB->ParameterOffset = 0;
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 4; /* single byte does not need le conversion */
+ pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_NOTIFY_CHANGE);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ if (notify_subdirs)
+ pSMB->WatchTree = 1; /* one byte - no le conversion needed */
+ pSMB->Reserved2 = 0;
+ pSMB->CompletionFilter = cpu_to_le32(filter);
+ pSMB->Fid = netfid; /* file handle always le */
+ pSMB->ByteCount = 0;
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *)pSMBr, &bytes_returned,
+ CIFS_ASYNC_OP);
+ if (rc) {
+ cifs_dbg(FYI, "Error in Notify = %d\n", rc);
+ } else {
+ /* Add file to outstanding requests */
+ /* BB change to kmem cache alloc */
+ dnotify_req = kmalloc(
+ sizeof(struct dir_notify_req),
+ GFP_KERNEL);
+ if (dnotify_req) {
+ dnotify_req->Pid = pSMB->hdr.Pid;
+ dnotify_req->PidHigh = pSMB->hdr.PidHigh;
+ dnotify_req->Mid = pSMB->hdr.Mid;
+ dnotify_req->Tid = pSMB->hdr.Tid;
+ dnotify_req->Uid = pSMB->hdr.Uid;
+ dnotify_req->netfid = netfid;
+ dnotify_req->pfile = pfile;
+ dnotify_req->filter = filter;
+ dnotify_req->multishot = multishot;
+ spin_lock(&GlobalMid_Lock);
+ list_add_tail(&dnotify_req->lhead,
+ &GlobalDnotifyReqList);
+ spin_unlock(&GlobalMid_Lock);
+ } else
+ rc = -ENOMEM;
+ }
+ cifs_buf_release(pSMB);
+ return rc;
+}
+#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */