[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/fs/cifs/smb2misc.c b/src/kernel/linux/v4.19/fs/cifs/smb2misc.c
new file mode 100644
index 0000000..766974f
--- /dev/null
+++ b/src/kernel/linux/v4.19/fs/cifs/smb2misc.c
@@ -0,0 +1,869 @@
+/*
+ * fs/cifs/smb2misc.c
+ *
+ * Copyright (C) International Business Machines Corp., 2002,2011
+ * Etersoft, 2012
+ * Author(s): Steve French (sfrench@us.ibm.com)
+ * Pavel Shilovsky (pshilovsky@samba.org) 2012
+ *
+ * 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
+ */
+#include <linux/ctype.h>
+#include "smb2pdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "smb2proto.h"
+#include "cifs_debug.h"
+#include "cifs_unicode.h"
+#include "smb2status.h"
+#include "smb2glob.h"
+
+static int
+check_smb2_hdr(struct smb2_sync_hdr *shdr, __u64 mid)
+{
+ __u64 wire_mid = le64_to_cpu(shdr->MessageId);
+
+ /*
+ * Make sure that this really is an SMB, that it is a response,
+ * and that the message ids match.
+ */
+ if ((shdr->ProtocolId == SMB2_PROTO_NUMBER) &&
+ (mid == wire_mid)) {
+ if (shdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
+ return 0;
+ else {
+ /* only one valid case where server sends us request */
+ if (shdr->Command == SMB2_OPLOCK_BREAK)
+ return 0;
+ else
+ cifs_dbg(VFS, "Received Request not response\n");
+ }
+ } else { /* bad signature or mid */
+ if (shdr->ProtocolId != SMB2_PROTO_NUMBER)
+ cifs_dbg(VFS, "Bad protocol string signature header %x\n",
+ le32_to_cpu(shdr->ProtocolId));
+ if (mid != wire_mid)
+ cifs_dbg(VFS, "Mids do not match: %llu and %llu\n",
+ mid, wire_mid);
+ }
+ cifs_dbg(VFS, "Bad SMB detected. The Mid=%llu\n", wire_mid);
+ return 1;
+}
+
+/*
+ * The following table defines the expected "StructureSize" of SMB2 responses
+ * in order by SMB2 command. This is similar to "wct" in SMB/CIFS responses.
+ *
+ * Note that commands are defined in smb2pdu.h in le16 but the array below is
+ * indexed by command in host byte order
+ */
+static const __le16 smb2_rsp_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
+ /* SMB2_NEGOTIATE */ cpu_to_le16(65),
+ /* SMB2_SESSION_SETUP */ cpu_to_le16(9),
+ /* SMB2_LOGOFF */ cpu_to_le16(4),
+ /* SMB2_TREE_CONNECT */ cpu_to_le16(16),
+ /* SMB2_TREE_DISCONNECT */ cpu_to_le16(4),
+ /* SMB2_CREATE */ cpu_to_le16(89),
+ /* SMB2_CLOSE */ cpu_to_le16(60),
+ /* SMB2_FLUSH */ cpu_to_le16(4),
+ /* SMB2_READ */ cpu_to_le16(17),
+ /* SMB2_WRITE */ cpu_to_le16(17),
+ /* SMB2_LOCK */ cpu_to_le16(4),
+ /* SMB2_IOCTL */ cpu_to_le16(49),
+ /* BB CHECK this ... not listed in documentation */
+ /* SMB2_CANCEL */ cpu_to_le16(0),
+ /* SMB2_ECHO */ cpu_to_le16(4),
+ /* SMB2_QUERY_DIRECTORY */ cpu_to_le16(9),
+ /* SMB2_CHANGE_NOTIFY */ cpu_to_le16(9),
+ /* SMB2_QUERY_INFO */ cpu_to_le16(9),
+ /* SMB2_SET_INFO */ cpu_to_le16(2),
+ /* BB FIXME can also be 44 for lease break */
+ /* SMB2_OPLOCK_BREAK */ cpu_to_le16(24)
+};
+
+static __u32 get_neg_ctxt_len(struct smb2_sync_hdr *hdr, __u32 len,
+ __u32 non_ctxlen)
+{
+ __u16 neg_count;
+ __u32 nc_offset, size_of_pad_before_neg_ctxts;
+ struct smb2_negotiate_rsp *pneg_rsp = (struct smb2_negotiate_rsp *)hdr;
+
+ /* Negotiate contexts are only valid for latest dialect SMB3.11 */
+ neg_count = le16_to_cpu(pneg_rsp->NegotiateContextCount);
+ if ((neg_count == 0) ||
+ (pneg_rsp->DialectRevision != cpu_to_le16(SMB311_PROT_ID)))
+ return 0;
+
+ /* Make sure that negotiate contexts start after gss security blob */
+ nc_offset = le32_to_cpu(pneg_rsp->NegotiateContextOffset);
+ if (nc_offset < non_ctxlen) {
+ printk_once(KERN_WARNING "invalid negotiate context offset\n");
+ return 0;
+ }
+ size_of_pad_before_neg_ctxts = nc_offset - non_ctxlen;
+
+ /* Verify that at least minimal negotiate contexts fit within frame */
+ if (len < nc_offset + (neg_count * sizeof(struct smb2_neg_context))) {
+ printk_once(KERN_WARNING "negotiate context goes beyond end\n");
+ return 0;
+ }
+
+ cifs_dbg(FYI, "length of negcontexts %d pad %d\n",
+ len - nc_offset, size_of_pad_before_neg_ctxts);
+
+ /* length of negcontexts including pad from end of sec blob to them */
+ return (len - nc_offset) + size_of_pad_before_neg_ctxts;
+}
+
+int
+smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr)
+{
+ struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
+ struct smb2_sync_pdu *pdu = (struct smb2_sync_pdu *)shdr;
+ __u64 mid;
+ __u32 clc_len; /* calculated length */
+ int command;
+ int pdu_size = sizeof(struct smb2_sync_pdu);
+ int hdr_size = sizeof(struct smb2_sync_hdr);
+
+ /*
+ * Add function to do table lookup of StructureSize by command
+ * ie Validate the wct via smb2_struct_sizes table above
+ */
+ if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
+ struct smb2_transform_hdr *thdr =
+ (struct smb2_transform_hdr *)buf;
+ struct cifs_ses *ses = NULL;
+ struct list_head *tmp;
+
+ /* decrypt frame now that it is completely read in */
+ spin_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp, &srvr->smb_ses_list) {
+ ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
+ if (ses->Suid == thdr->SessionId)
+ break;
+
+ ses = NULL;
+ }
+ spin_unlock(&cifs_tcp_ses_lock);
+ if (ses == NULL) {
+ cifs_dbg(VFS, "no decryption - session id not found\n");
+ return 1;
+ }
+ }
+
+ mid = le64_to_cpu(shdr->MessageId);
+ if (len < pdu_size) {
+ if ((len >= hdr_size)
+ && (shdr->Status != 0)) {
+ pdu->StructureSize2 = 0;
+ /*
+ * As with SMB/CIFS, on some error cases servers may
+ * not return wct properly
+ */
+ return 0;
+ } else {
+ cifs_dbg(VFS, "Length less than SMB header size\n");
+ }
+ return 1;
+ }
+ if (len > CIFSMaxBufSize + MAX_SMB2_HDR_SIZE) {
+ cifs_dbg(VFS, "SMB length greater than maximum, mid=%llu\n",
+ mid);
+ return 1;
+ }
+
+ if (check_smb2_hdr(shdr, mid))
+ return 1;
+
+ if (shdr->StructureSize != SMB2_HEADER_STRUCTURE_SIZE) {
+ cifs_dbg(VFS, "Illegal structure size %u\n",
+ le16_to_cpu(shdr->StructureSize));
+ return 1;
+ }
+
+ command = le16_to_cpu(shdr->Command);
+ if (command >= NUMBER_OF_SMB2_COMMANDS) {
+ cifs_dbg(VFS, "Illegal SMB2 command %d\n", command);
+ return 1;
+ }
+
+ if (smb2_rsp_struct_sizes[command] != pdu->StructureSize2) {
+ if (command != SMB2_OPLOCK_BREAK_HE && (shdr->Status == 0 ||
+ pdu->StructureSize2 != SMB2_ERROR_STRUCTURE_SIZE2)) {
+ /* error packets have 9 byte structure size */
+ cifs_dbg(VFS, "Illegal response size %u for command %d\n",
+ le16_to_cpu(pdu->StructureSize2), command);
+ return 1;
+ } else if (command == SMB2_OPLOCK_BREAK_HE
+ && (shdr->Status == 0)
+ && (le16_to_cpu(pdu->StructureSize2) != 44)
+ && (le16_to_cpu(pdu->StructureSize2) != 36)) {
+ /* special case for SMB2.1 lease break message */
+ cifs_dbg(VFS, "Illegal response size %d for oplock break\n",
+ le16_to_cpu(pdu->StructureSize2));
+ return 1;
+ }
+ }
+
+ clc_len = smb2_calc_size(buf, srvr);
+
+ if (shdr->Command == SMB2_NEGOTIATE)
+ clc_len += get_neg_ctxt_len(shdr, len, clc_len);
+
+ if (len != clc_len) {
+ cifs_dbg(FYI, "Calculated size %u length %u mismatch mid %llu\n",
+ clc_len, len, mid);
+ /* create failed on symlink */
+ if (command == SMB2_CREATE_HE &&
+ shdr->Status == STATUS_STOPPED_ON_SYMLINK)
+ return 0;
+ /* Windows 7 server returns 24 bytes more */
+ if (clc_len + 24 == len && command == SMB2_OPLOCK_BREAK_HE)
+ return 0;
+ /* server can return one byte more due to implied bcc[0] */
+ if (clc_len == len + 1)
+ return 0;
+
+ /*
+ * Some windows servers (win2016) will pad also the final
+ * PDU in a compound to 8 bytes.
+ */
+ if (((clc_len + 7) & ~7) == len)
+ return 0;
+
+ /*
+ * MacOS server pads after SMB2.1 write response with 3 bytes
+ * of junk. Other servers match RFC1001 len to actual
+ * SMB2/SMB3 frame length (header + smb2 response specific data)
+ * Some windows servers also pad up to 8 bytes when compounding.
+ * If pad is longer than eight bytes, log the server behavior
+ * (once), since may indicate a problem but allow it and continue
+ * since the frame is parseable.
+ */
+ if (clc_len < len) {
+ pr_warn_once(
+ "srv rsp padded more than expected. Length %d not %d for cmd:%d mid:%llu\n",
+ len, clc_len, command, mid);
+ return 0;
+ }
+ pr_warn_once(
+ "srv rsp too short, len %d not %d. cmd:%d mid:%llu\n",
+ len, clc_len, command, mid);
+
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * The size of the variable area depends on the offset and length fields
+ * located in different fields for various SMB2 responses. SMB2 responses
+ * with no variable length info, show an offset of zero for the offset field.
+ */
+static const bool has_smb2_data_area[NUMBER_OF_SMB2_COMMANDS] = {
+ /* SMB2_NEGOTIATE */ true,
+ /* SMB2_SESSION_SETUP */ true,
+ /* SMB2_LOGOFF */ false,
+ /* SMB2_TREE_CONNECT */ false,
+ /* SMB2_TREE_DISCONNECT */ false,
+ /* SMB2_CREATE */ true,
+ /* SMB2_CLOSE */ false,
+ /* SMB2_FLUSH */ false,
+ /* SMB2_READ */ true,
+ /* SMB2_WRITE */ false,
+ /* SMB2_LOCK */ false,
+ /* SMB2_IOCTL */ true,
+ /* SMB2_CANCEL */ false, /* BB CHECK this not listed in documentation */
+ /* SMB2_ECHO */ false,
+ /* SMB2_QUERY_DIRECTORY */ true,
+ /* SMB2_CHANGE_NOTIFY */ true,
+ /* SMB2_QUERY_INFO */ true,
+ /* SMB2_SET_INFO */ false,
+ /* SMB2_OPLOCK_BREAK */ false
+};
+
+/*
+ * Returns the pointer to the beginning of the data area. Length of the data
+ * area and the offset to it (from the beginning of the smb are also returned.
+ */
+char *
+smb2_get_data_area_len(int *off, int *len, struct smb2_sync_hdr *shdr)
+{
+ *off = 0;
+ *len = 0;
+
+ /* error responses do not have data area */
+ if (shdr->Status && shdr->Status != STATUS_MORE_PROCESSING_REQUIRED &&
+ (((struct smb2_err_rsp *)shdr)->StructureSize) ==
+ SMB2_ERROR_STRUCTURE_SIZE2)
+ return NULL;
+
+ /*
+ * Following commands have data areas so we have to get the location
+ * of the data buffer offset and data buffer length for the particular
+ * command.
+ */
+ switch (shdr->Command) {
+ case SMB2_NEGOTIATE:
+ *off = le16_to_cpu(
+ ((struct smb2_negotiate_rsp *)shdr)->SecurityBufferOffset);
+ *len = le16_to_cpu(
+ ((struct smb2_negotiate_rsp *)shdr)->SecurityBufferLength);
+ break;
+ case SMB2_SESSION_SETUP:
+ *off = le16_to_cpu(
+ ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferOffset);
+ *len = le16_to_cpu(
+ ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferLength);
+ break;
+ case SMB2_CREATE:
+ *off = le32_to_cpu(
+ ((struct smb2_create_rsp *)shdr)->CreateContextsOffset);
+ *len = le32_to_cpu(
+ ((struct smb2_create_rsp *)shdr)->CreateContextsLength);
+ break;
+ case SMB2_QUERY_INFO:
+ *off = le16_to_cpu(
+ ((struct smb2_query_info_rsp *)shdr)->OutputBufferOffset);
+ *len = le32_to_cpu(
+ ((struct smb2_query_info_rsp *)shdr)->OutputBufferLength);
+ break;
+ case SMB2_READ:
+ /* TODO: is this a bug ? */
+ *off = ((struct smb2_read_rsp *)shdr)->DataOffset;
+ *len = le32_to_cpu(((struct smb2_read_rsp *)shdr)->DataLength);
+ break;
+ case SMB2_QUERY_DIRECTORY:
+ *off = le16_to_cpu(
+ ((struct smb2_query_directory_rsp *)shdr)->OutputBufferOffset);
+ *len = le32_to_cpu(
+ ((struct smb2_query_directory_rsp *)shdr)->OutputBufferLength);
+ break;
+ case SMB2_IOCTL:
+ *off = le32_to_cpu(
+ ((struct smb2_ioctl_rsp *)shdr)->OutputOffset);
+ *len = le32_to_cpu(
+ ((struct smb2_ioctl_rsp *)shdr)->OutputCount);
+ break;
+ case SMB2_CHANGE_NOTIFY:
+ default:
+ /* BB FIXME for unimplemented cases above */
+ cifs_dbg(VFS, "no length check for command\n");
+ break;
+ }
+
+ /*
+ * Invalid length or offset probably means data area is invalid, but
+ * we have little choice but to ignore the data area in this case.
+ */
+ if (*off > 4096) {
+ cifs_dbg(VFS, "offset %d too large, data area ignored\n", *off);
+ *len = 0;
+ *off = 0;
+ } else if (*off < 0) {
+ cifs_dbg(VFS, "negative offset %d to data invalid ignore data area\n",
+ *off);
+ *off = 0;
+ *len = 0;
+ } else if (*len < 0) {
+ cifs_dbg(VFS, "negative data length %d invalid, data area ignored\n",
+ *len);
+ *len = 0;
+ } else if (*len > 128 * 1024) {
+ cifs_dbg(VFS, "data area larger than 128K: %d\n", *len);
+ *len = 0;
+ }
+
+ /* return pointer to beginning of data area, ie offset from SMB start */
+ if ((*off != 0) && (*len != 0))
+ return (char *)shdr + *off;
+ else
+ return NULL;
+}
+
+/*
+ * Calculate the size of the SMB message based on the fixed header
+ * portion, the number of word parameters and the data portion of the message.
+ */
+unsigned int
+smb2_calc_size(void *buf, struct TCP_Server_Info *srvr)
+{
+ struct smb2_sync_pdu *pdu = (struct smb2_sync_pdu *)buf;
+ struct smb2_sync_hdr *shdr = &pdu->sync_hdr;
+ int offset; /* the offset from the beginning of SMB to data area */
+ int data_length; /* the length of the variable length data area */
+ /* Structure Size has already been checked to make sure it is 64 */
+ int len = le16_to_cpu(shdr->StructureSize);
+
+ /*
+ * StructureSize2, ie length of fixed parameter area has already
+ * been checked to make sure it is the correct length.
+ */
+ len += le16_to_cpu(pdu->StructureSize2);
+
+ if (has_smb2_data_area[le16_to_cpu(shdr->Command)] == false)
+ goto calc_size_exit;
+
+ smb2_get_data_area_len(&offset, &data_length, shdr);
+ cifs_dbg(FYI, "SMB2 data length %d offset %d\n", data_length, offset);
+
+ if (data_length > 0) {
+ /*
+ * Check to make sure that data area begins after fixed area,
+ * Note that last byte of the fixed area is part of data area
+ * for some commands, typically those with odd StructureSize,
+ * so we must add one to the calculation.
+ */
+ if (offset + 1 < len) {
+ cifs_dbg(VFS, "data area offset %d overlaps SMB2 header %d\n",
+ offset + 1, len);
+ data_length = 0;
+ } else {
+ len = offset + data_length;
+ }
+ }
+calc_size_exit:
+ cifs_dbg(FYI, "SMB2 len %d\n", len);
+ return len;
+}
+
+/* Note: caller must free return buffer */
+__le16 *
+cifs_convert_path_to_utf16(const char *from, struct cifs_sb_info *cifs_sb)
+{
+ int len;
+ const char *start_of_path;
+ __le16 *to;
+ int map_type;
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
+ map_type = SFM_MAP_UNI_RSVD;
+ else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
+ map_type = SFU_MAP_UNI_RSVD;
+ else
+ map_type = NO_MAP_UNI_RSVD;
+
+ /* Windows doesn't allow paths beginning with \ */
+ if (from[0] == '\\')
+ start_of_path = from + 1;
+
+ /* SMB311 POSIX extensions paths do not include leading slash */
+ else if (cifs_sb_master_tlink(cifs_sb) &&
+ cifs_sb_master_tcon(cifs_sb)->posix_extensions &&
+ (from[0] == '/')) {
+ start_of_path = from + 1;
+ } else
+ start_of_path = from;
+
+ to = cifs_strndup_to_utf16(start_of_path, PATH_MAX, &len,
+ cifs_sb->local_nls, map_type);
+ return to;
+}
+
+__le32
+smb2_get_lease_state(struct cifsInodeInfo *cinode)
+{
+ __le32 lease = 0;
+
+ if (CIFS_CACHE_WRITE(cinode))
+ lease |= SMB2_LEASE_WRITE_CACHING;
+ if (CIFS_CACHE_HANDLE(cinode))
+ lease |= SMB2_LEASE_HANDLE_CACHING;
+ if (CIFS_CACHE_READ(cinode))
+ lease |= SMB2_LEASE_READ_CACHING;
+ return lease;
+}
+
+struct smb2_lease_break_work {
+ struct work_struct lease_break;
+ struct tcon_link *tlink;
+ __u8 lease_key[16];
+ __le32 lease_state;
+};
+
+static void
+cifs_ses_oplock_break(struct work_struct *work)
+{
+ struct smb2_lease_break_work *lw = container_of(work,
+ struct smb2_lease_break_work, lease_break);
+ int rc = 0;
+
+ rc = SMB2_lease_break(0, tlink_tcon(lw->tlink), lw->lease_key,
+ lw->lease_state);
+
+ cifs_dbg(FYI, "Lease release rc %d\n", rc);
+ cifs_put_tlink(lw->tlink);
+ kfree(lw);
+}
+
+static bool
+smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp,
+ struct smb2_lease_break_work *lw)
+{
+ bool found;
+ __u8 lease_state;
+ struct list_head *tmp;
+ struct cifsFileInfo *cfile;
+ struct cifs_pending_open *open;
+ struct cifsInodeInfo *cinode;
+ int ack_req = le32_to_cpu(rsp->Flags &
+ SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED);
+
+ lease_state = le32_to_cpu(rsp->NewLeaseState);
+
+ list_for_each(tmp, &tcon->openFileList) {
+ cfile = list_entry(tmp, struct cifsFileInfo, tlist);
+ cinode = CIFS_I(d_inode(cfile->dentry));
+
+ if (memcmp(cinode->lease_key, rsp->LeaseKey,
+ SMB2_LEASE_KEY_SIZE))
+ continue;
+
+ cifs_dbg(FYI, "found in the open list\n");
+ cifs_dbg(FYI, "lease key match, lease break 0x%x\n",
+ le32_to_cpu(rsp->NewLeaseState));
+
+ if (ack_req)
+ cfile->oplock_break_cancelled = false;
+ else
+ cfile->oplock_break_cancelled = true;
+
+ set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags);
+
+ /*
+ * Set or clear flags depending on the lease state being READ.
+ * HANDLE caching flag should be added when the client starts
+ * to defer closing remote file handles with HANDLE leases.
+ */
+ if (lease_state & SMB2_LEASE_READ_CACHING_HE)
+ set_bit(CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2,
+ &cinode->flags);
+ else
+ clear_bit(CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2,
+ &cinode->flags);
+
+ cifs_queue_oplock_break(cfile);
+ kfree(lw);
+ return true;
+ }
+
+ found = false;
+ list_for_each_entry(open, &tcon->pending_opens, olist) {
+ if (memcmp(open->lease_key, rsp->LeaseKey,
+ SMB2_LEASE_KEY_SIZE))
+ continue;
+
+ if (!found && ack_req) {
+ found = true;
+ memcpy(lw->lease_key, open->lease_key,
+ SMB2_LEASE_KEY_SIZE);
+ lw->tlink = cifs_get_tlink(open->tlink);
+ queue_work(cifsiod_wq, &lw->lease_break);
+ }
+
+ cifs_dbg(FYI, "found in the pending open list\n");
+ cifs_dbg(FYI, "lease key match, lease break 0x%x\n",
+ le32_to_cpu(rsp->NewLeaseState));
+
+ open->oplock = lease_state;
+ }
+
+ return found;
+}
+
+static bool
+smb2_is_valid_lease_break(char *buffer)
+{
+ struct smb2_lease_break *rsp = (struct smb2_lease_break *)buffer;
+ struct list_head *tmp, *tmp1, *tmp2;
+ struct TCP_Server_Info *server;
+ struct cifs_ses *ses;
+ struct cifs_tcon *tcon;
+ struct smb2_lease_break_work *lw;
+
+ lw = kmalloc(sizeof(struct smb2_lease_break_work), GFP_KERNEL);
+ if (!lw)
+ return false;
+
+ INIT_WORK(&lw->lease_break, cifs_ses_oplock_break);
+ lw->lease_state = rsp->NewLeaseState;
+
+ cifs_dbg(FYI, "Checking for lease break\n");
+
+ /* look up tcon based on tid & uid */
+ spin_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp, &cifs_tcp_ses_list) {
+ server = list_entry(tmp, struct TCP_Server_Info, tcp_ses_list);
+
+ list_for_each(tmp1, &server->smb_ses_list) {
+ ses = list_entry(tmp1, struct cifs_ses, smb_ses_list);
+
+ list_for_each(tmp2, &ses->tcon_list) {
+ tcon = list_entry(tmp2, struct cifs_tcon,
+ tcon_list);
+ spin_lock(&tcon->open_file_lock);
+ cifs_stats_inc(
+ &tcon->stats.cifs_stats.num_oplock_brks);
+ if (smb2_tcon_has_lease(tcon, rsp, lw)) {
+ spin_unlock(&tcon->open_file_lock);
+ spin_unlock(&cifs_tcp_ses_lock);
+ return true;
+ }
+ spin_unlock(&tcon->open_file_lock);
+
+ if (tcon->crfid.is_valid &&
+ !memcmp(rsp->LeaseKey,
+ tcon->crfid.fid->lease_key,
+ SMB2_LEASE_KEY_SIZE)) {
+ INIT_WORK(&tcon->crfid.lease_break,
+ smb2_cached_lease_break);
+ queue_work(cifsiod_wq,
+ &tcon->crfid.lease_break);
+ spin_unlock(&cifs_tcp_ses_lock);
+ return true;
+ }
+ }
+ }
+ }
+ spin_unlock(&cifs_tcp_ses_lock);
+ kfree(lw);
+ cifs_dbg(FYI, "Can not process lease break - no lease matched\n");
+ return false;
+}
+
+bool
+smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
+{
+ struct smb2_oplock_break *rsp = (struct smb2_oplock_break *)buffer;
+ struct list_head *tmp, *tmp1, *tmp2;
+ struct cifs_ses *ses;
+ struct cifs_tcon *tcon;
+ struct cifsInodeInfo *cinode;
+ struct cifsFileInfo *cfile;
+
+ cifs_dbg(FYI, "Checking for oplock break\n");
+
+ if (rsp->sync_hdr.Command != SMB2_OPLOCK_BREAK)
+ return false;
+
+ if (rsp->StructureSize !=
+ smb2_rsp_struct_sizes[SMB2_OPLOCK_BREAK_HE]) {
+ if (le16_to_cpu(rsp->StructureSize) == 44)
+ return smb2_is_valid_lease_break(buffer);
+ else
+ return false;
+ }
+
+ cifs_dbg(FYI, "oplock level 0x%x\n", rsp->OplockLevel);
+
+ /* look up tcon based on tid & uid */
+ spin_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp, &server->smb_ses_list) {
+ ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
+
+ list_for_each(tmp1, &ses->tcon_list) {
+ tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
+
+ spin_lock(&tcon->open_file_lock);
+ list_for_each(tmp2, &tcon->openFileList) {
+ cfile = list_entry(tmp2, struct cifsFileInfo,
+ tlist);
+ if (rsp->PersistentFid !=
+ cfile->fid.persistent_fid ||
+ rsp->VolatileFid !=
+ cfile->fid.volatile_fid)
+ continue;
+
+ cifs_dbg(FYI, "file id match, oplock break\n");
+ cifs_stats_inc(
+ &tcon->stats.cifs_stats.num_oplock_brks);
+ cinode = CIFS_I(d_inode(cfile->dentry));
+ spin_lock(&cfile->file_info_lock);
+ if (!CIFS_CACHE_WRITE(cinode) &&
+ rsp->OplockLevel == SMB2_OPLOCK_LEVEL_NONE)
+ cfile->oplock_break_cancelled = true;
+ else
+ cfile->oplock_break_cancelled = false;
+
+ set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK,
+ &cinode->flags);
+
+ /*
+ * Set flag if the server downgrades the oplock
+ * to L2 else clear.
+ */
+ if (rsp->OplockLevel)
+ set_bit(
+ CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2,
+ &cinode->flags);
+ else
+ clear_bit(
+ CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2,
+ &cinode->flags);
+ spin_unlock(&cfile->file_info_lock);
+
+ cifs_queue_oplock_break(cfile);
+
+ spin_unlock(&tcon->open_file_lock);
+ spin_unlock(&cifs_tcp_ses_lock);
+ return true;
+ }
+ spin_unlock(&tcon->open_file_lock);
+ }
+ }
+ spin_unlock(&cifs_tcp_ses_lock);
+ cifs_dbg(FYI, "Can not process oplock break for non-existent connection\n");
+ return false;
+}
+
+void
+smb2_cancelled_close_fid(struct work_struct *work)
+{
+ struct close_cancelled_open *cancelled = container_of(work,
+ struct close_cancelled_open, work);
+
+ cifs_dbg(VFS, "Close unmatched open\n");
+
+ SMB2_close(0, cancelled->tcon, cancelled->fid.persistent_fid,
+ cancelled->fid.volatile_fid);
+ cifs_put_tcon(cancelled->tcon);
+ kfree(cancelled);
+}
+
+/* Caller should already has an extra reference to @tcon */
+static int
+__smb2_handle_cancelled_close(struct cifs_tcon *tcon, __u64 persistent_fid,
+ __u64 volatile_fid)
+{
+ struct close_cancelled_open *cancelled;
+
+ cancelled = kzalloc(sizeof(*cancelled), GFP_KERNEL);
+ if (!cancelled)
+ return -ENOMEM;
+
+ cancelled->fid.persistent_fid = persistent_fid;
+ cancelled->fid.volatile_fid = volatile_fid;
+ cancelled->tcon = tcon;
+ INIT_WORK(&cancelled->work, smb2_cancelled_close_fid);
+ WARN_ON(queue_work(cifsiod_wq, &cancelled->work) == false);
+
+ return 0;
+}
+
+int
+smb2_handle_cancelled_close(struct cifs_tcon *tcon, __u64 persistent_fid,
+ __u64 volatile_fid)
+{
+ int rc;
+
+ cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
+ spin_lock(&cifs_tcp_ses_lock);
+ tcon->tc_count++;
+ spin_unlock(&cifs_tcp_ses_lock);
+
+ rc = __smb2_handle_cancelled_close(tcon, persistent_fid, volatile_fid);
+ if (rc)
+ cifs_put_tcon(tcon);
+
+ return rc;
+}
+
+int
+smb2_handle_cancelled_mid(char *buffer, struct TCP_Server_Info *server)
+{
+ struct smb2_sync_hdr *sync_hdr = (struct smb2_sync_hdr *)buffer;
+ struct smb2_create_rsp *rsp = (struct smb2_create_rsp *)buffer;
+ struct cifs_tcon *tcon;
+ int rc;
+
+ if (sync_hdr->Command != SMB2_CREATE ||
+ sync_hdr->Status != STATUS_SUCCESS)
+ return 0;
+
+ tcon = smb2_find_smb_tcon(server, sync_hdr->SessionId,
+ sync_hdr->TreeId);
+ if (!tcon)
+ return -ENOENT;
+
+ rc = __smb2_handle_cancelled_close(tcon, rsp->PersistentFileId,
+ rsp->VolatileFileId);
+ if (rc)
+ cifs_put_tcon(tcon);
+
+ return rc;
+}
+
+/**
+ * smb311_update_preauth_hash - update @ses hash with the packet data in @iov
+ *
+ * Assumes @iov does not contain the rfc1002 length and iov[0] has the
+ * SMB2 header.
+ */
+int
+smb311_update_preauth_hash(struct cifs_ses *ses, struct kvec *iov, int nvec)
+{
+ int i, rc;
+ struct sdesc *d;
+ struct smb2_sync_hdr *hdr;
+
+ if (ses->server->tcpStatus == CifsGood) {
+ /* skip non smb311 connections */
+ if (ses->server->dialect != SMB311_PROT_ID)
+ return 0;
+
+ /* skip last sess setup response */
+ hdr = (struct smb2_sync_hdr *)iov[0].iov_base;
+ if (hdr->Flags & SMB2_FLAGS_SIGNED)
+ return 0;
+ }
+
+ rc = smb311_crypto_shash_allocate(ses->server);
+ if (rc)
+ return rc;
+
+ d = ses->server->secmech.sdescsha512;
+ rc = crypto_shash_init(&d->shash);
+ if (rc) {
+ cifs_dbg(VFS, "%s: could not init sha512 shash\n", __func__);
+ return rc;
+ }
+
+ rc = crypto_shash_update(&d->shash, ses->preauth_sha_hash,
+ SMB2_PREAUTH_HASH_SIZE);
+ if (rc) {
+ cifs_dbg(VFS, "%s: could not update sha512 shash\n", __func__);
+ return rc;
+ }
+
+ for (i = 0; i < nvec; i++) {
+ rc = crypto_shash_update(&d->shash,
+ iov[i].iov_base, iov[i].iov_len);
+ if (rc) {
+ cifs_dbg(VFS, "%s: could not update sha512 shash\n",
+ __func__);
+ return rc;
+ }
+ }
+
+ rc = crypto_shash_final(&d->shash, ses->preauth_sha_hash);
+ if (rc) {
+ cifs_dbg(VFS, "%s: could not finalize sha512 shash\n",
+ __func__);
+ return rc;
+ }
+
+ return 0;
+}