[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/cifs/cifsfs.c b/ap/os/linux/linux-3.4.x/fs/cifs/cifsfs.c
new file mode 100644
index 0000000..c0f65e8
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/cifs/cifsfs.c
@@ -0,0 +1,1240 @@
+/*
+ * fs/cifs/cifsfs.c
+ *
+ * Copyright (C) International Business Machines Corp., 2002,2008
+ * Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ * Common Internet FileSystem (CIFS) client
+ *
+ * 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
+ */
+
+/* Note that BB means BUGBUG (ie something to fix eventually) */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/mount.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/seq_file.h>
+#include <linux/vfs.h>
+#include <linux/mempool.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/namei.h>
+#include <net/ipv6.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#define DECLARE_GLOBALS_HERE
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include <linux/mm.h>
+#include <linux/key-type.h>
+#include "cifs_spnego.h"
+#include "fscache.h"
+#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
+
+int cifsFYI = 0;
+int cifsERROR = 1;
+int traceSMB = 0;
+bool enable_oplocks = true;
+unsigned int linuxExtEnabled = 1;
+unsigned int lookupCacheEnabled = 1;
+unsigned int multiuser_mount = 0;
+unsigned int global_secflags = CIFSSEC_DEF;
+/* unsigned int ntlmv2_support = 0; */
+unsigned int sign_CIFS_PDUs = 1;
+static const struct super_operations cifs_super_ops;
+unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
+module_param(CIFSMaxBufSize, int, 0);
+MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
+ "Default: 16384 Range: 8192 to 130048");
+unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
+module_param(cifs_min_rcv, int, 0);
+MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
+ "1 to 64");
+unsigned int cifs_min_small = 30;
+module_param(cifs_min_small, int, 0);
+MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
+ "Range: 2 to 256");
+unsigned int cifs_max_pending = CIFS_MAX_REQ;
+module_param(cifs_max_pending, int, 0444);
+MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
+ "Default: 32767 Range: 2 to 32767.");
+module_param(enable_oplocks, bool, 0644);
+MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
+ "y/Y/1");
+
+extern mempool_t *cifs_sm_req_poolp;
+extern mempool_t *cifs_req_poolp;
+extern mempool_t *cifs_mid_poolp;
+
+struct workqueue_struct *cifsiod_wq;
+
+/*
+ * Bumps refcount for cifs super block.
+ * Note that it should be only called if a referece to VFS super block is
+ * already held, e.g. in open-type syscalls context. Otherwise it can race with
+ * atomic_dec_and_test in deactivate_locked_super.
+ */
+void
+cifs_sb_active(struct super_block *sb)
+{
+ struct cifs_sb_info *server = CIFS_SB(sb);
+
+ if (atomic_inc_return(&server->active) == 1)
+ atomic_inc(&sb->s_active);
+}
+
+void
+cifs_sb_deactive(struct super_block *sb)
+{
+ struct cifs_sb_info *server = CIFS_SB(sb);
+
+ if (atomic_dec_and_test(&server->active))
+ deactivate_super(sb);
+}
+
+static int
+cifs_read_super(struct super_block *sb)
+{
+ struct inode *inode;
+ struct cifs_sb_info *cifs_sb;
+ int rc = 0;
+
+ cifs_sb = CIFS_SB(sb);
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
+ sb->s_flags |= MS_POSIXACL;
+
+ if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+ else
+ sb->s_maxbytes = MAX_NON_LFS;
+
+ /* BB FIXME fix time_gran to be larger for LANMAN sessions */
+ sb->s_time_gran = 100;
+
+ sb->s_magic = CIFS_MAGIC_NUMBER;
+ sb->s_op = &cifs_super_ops;
+ sb->s_bdi = &cifs_sb->bdi;
+ sb->s_blocksize = CIFS_MAX_MSGSIZE;
+ sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
+ inode = cifs_root_iget(sb);
+
+ if (IS_ERR(inode)) {
+ rc = PTR_ERR(inode);
+ goto out_no_root;
+ }
+
+ sb->s_root = d_make_root(inode);
+ if (!sb->s_root) {
+ rc = -ENOMEM;
+ goto out_no_root;
+ }
+
+ /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
+ if (cifs_sb_master_tcon(cifs_sb)->nocase)
+ sb->s_d_op = &cifs_ci_dentry_ops;
+ else
+ sb->s_d_op = &cifs_dentry_ops;
+
+#ifdef CONFIG_CIFS_NFSD_EXPORT
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
+ cFYI(1, "export ops supported");
+ sb->s_export_op = &cifs_export_ops;
+ }
+#endif /* CONFIG_CIFS_NFSD_EXPORT */
+
+ return 0;
+
+out_no_root:
+ cERROR(1, "cifs_read_super: get root inode failed");
+ return rc;
+}
+
+static void cifs_kill_sb(struct super_block *sb)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ kill_anon_super(sb);
+ cifs_umount(cifs_sb);
+}
+
+static int
+cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct super_block *sb = dentry->d_sb;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+ int rc = -EOPNOTSUPP;
+ int xid;
+
+ xid = GetXid();
+
+ buf->f_type = CIFS_MAGIC_NUMBER;
+
+ /*
+ * PATH_MAX may be too long - it would presumably be total path,
+ * but note that some servers (includinng Samba 3) have a shorter
+ * maximum path.
+ *
+ * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
+ */
+ buf->f_namelen = PATH_MAX;
+ buf->f_files = 0; /* undefined */
+ buf->f_ffree = 0; /* unlimited */
+
+ /*
+ * We could add a second check for a QFS Unix capability bit
+ */
+ if ((tcon->ses->capabilities & CAP_UNIX) &&
+ (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
+ rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
+
+ /*
+ * Only need to call the old QFSInfo if failed on newer one,
+ * e.g. by OS/2.
+ **/
+ if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
+ rc = CIFSSMBQFSInfo(xid, tcon, buf);
+
+ /*
+ * Some old Windows servers also do not support level 103, retry with
+ * older level one if old server failed the previous call or we
+ * bypassed it because we detected that this was an older LANMAN sess
+ */
+ if (rc)
+ rc = SMBOldQFSInfo(xid, tcon, buf);
+
+ FreeXid(xid);
+ return 0;
+}
+
+static int cifs_permission(struct inode *inode, int mask)
+{
+ struct cifs_sb_info *cifs_sb;
+
+ cifs_sb = CIFS_SB(inode->i_sb);
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
+ if ((mask & MAY_EXEC) && !execute_ok(inode))
+ return -EACCES;
+ else
+ return 0;
+ } else /* file mode might have been restricted at mount time
+ on the client (above and beyond ACL on servers) for
+ servers which do not support setting and viewing mode bits,
+ so allowing client to check permissions is useful */
+ return generic_permission(inode, mask);
+}
+
+static struct kmem_cache *cifs_inode_cachep;
+static struct kmem_cache *cifs_req_cachep;
+static struct kmem_cache *cifs_mid_cachep;
+static struct kmem_cache *cifs_sm_req_cachep;
+mempool_t *cifs_sm_req_poolp;
+mempool_t *cifs_req_poolp;
+mempool_t *cifs_mid_poolp;
+
+static struct inode *
+cifs_alloc_inode(struct super_block *sb)
+{
+ struct cifsInodeInfo *cifs_inode;
+ cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
+ if (!cifs_inode)
+ return NULL;
+ cifs_inode->cifsAttrs = 0x20; /* default */
+ cifs_inode->time = 0;
+ /* Until the file is open and we have gotten oplock
+ info back from the server, can not assume caching of
+ file data or metadata */
+ cifs_set_oplock_level(cifs_inode, 0);
+ cifs_inode->delete_pending = false;
+ cifs_inode->invalid_mapping = false;
+ cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
+ cifs_inode->server_eof = 0;
+ cifs_inode->uniqueid = 0;
+ cifs_inode->createtime = 0;
+
+ /* Can not set i_flags here - they get immediately overwritten
+ to zero by the VFS */
+/* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
+ INIT_LIST_HEAD(&cifs_inode->openFileList);
+ return &cifs_inode->vfs_inode;
+}
+
+static void cifs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ INIT_LIST_HEAD(&inode->i_dentry);
+ kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
+}
+
+static void
+cifs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, cifs_i_callback);
+}
+
+static void
+cifs_evict_inode(struct inode *inode)
+{
+ truncate_inode_pages(&inode->i_data, 0);
+ end_writeback(inode);
+ cifs_fscache_release_inode_cookie(inode);
+}
+
+static void
+cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
+{
+ struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
+ struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
+
+ seq_printf(s, ",addr=");
+
+ switch (server->dstaddr.ss_family) {
+ case AF_INET:
+ seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
+ break;
+ case AF_INET6:
+ seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
+ if (sa6->sin6_scope_id)
+ seq_printf(s, "%%%u", sa6->sin6_scope_id);
+ break;
+ default:
+ seq_printf(s, "(unknown)");
+ }
+}
+
+static void
+cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
+{
+ seq_printf(s, ",sec=");
+
+ switch (server->secType) {
+ case LANMAN:
+ seq_printf(s, "lanman");
+ break;
+ case NTLMv2:
+ seq_printf(s, "ntlmv2");
+ break;
+ case NTLM:
+ seq_printf(s, "ntlm");
+ break;
+ case Kerberos:
+ seq_printf(s, "krb5");
+ break;
+ case RawNTLMSSP:
+ seq_printf(s, "ntlmssp");
+ break;
+ default:
+ /* shouldn't ever happen */
+ seq_printf(s, "unknown");
+ break;
+ }
+
+ if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
+ seq_printf(s, "i");
+}
+
+/*
+ * cifs_show_options() is for displaying mount options in /proc/mounts.
+ * Not all settable options are displayed but most of the important
+ * ones are.
+ */
+static int
+cifs_show_options(struct seq_file *s, struct dentry *root)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
+ struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+ struct sockaddr *srcaddr;
+ srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
+
+ cifs_show_security(s, tcon->ses->server);
+
+ seq_printf(s, ",unc=%s", tcon->treeName);
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
+ seq_printf(s, ",multiuser");
+ else if (tcon->ses->user_name)
+ seq_printf(s, ",username=%s", tcon->ses->user_name);
+
+ if (tcon->ses->domainName)
+ seq_printf(s, ",domain=%s", tcon->ses->domainName);
+
+ if (srcaddr->sa_family != AF_UNSPEC) {
+ struct sockaddr_in *saddr4;
+ struct sockaddr_in6 *saddr6;
+ saddr4 = (struct sockaddr_in *)srcaddr;
+ saddr6 = (struct sockaddr_in6 *)srcaddr;
+ if (srcaddr->sa_family == AF_INET6)
+ seq_printf(s, ",srcaddr=%pI6c",
+ &saddr6->sin6_addr);
+ else if (srcaddr->sa_family == AF_INET)
+ seq_printf(s, ",srcaddr=%pI4",
+ &saddr4->sin_addr.s_addr);
+ else
+ seq_printf(s, ",srcaddr=BAD-AF:%i",
+ (int)(srcaddr->sa_family));
+ }
+
+ seq_printf(s, ",uid=%u", cifs_sb->mnt_uid);
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
+ seq_printf(s, ",forceuid");
+ else
+ seq_printf(s, ",noforceuid");
+
+ seq_printf(s, ",gid=%u", cifs_sb->mnt_gid);
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
+ seq_printf(s, ",forcegid");
+ else
+ seq_printf(s, ",noforcegid");
+
+ cifs_show_address(s, tcon->ses->server);
+
+ if (!tcon->unix_ext)
+ seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
+ cifs_sb->mnt_file_mode,
+ cifs_sb->mnt_dir_mode);
+ if (tcon->seal)
+ seq_printf(s, ",seal");
+ if (tcon->nocase)
+ seq_printf(s, ",nocase");
+ if (tcon->retry)
+ seq_printf(s, ",hard");
+ if (tcon->unix_ext)
+ seq_printf(s, ",unix");
+ else
+ seq_printf(s, ",nounix");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
+ seq_printf(s, ",posixpaths");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
+ seq_printf(s, ",setuids");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
+ seq_printf(s, ",serverino");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
+ seq_printf(s, ",rwpidforward");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
+ seq_printf(s, ",forcemand");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
+ seq_printf(s, ",directio");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+ seq_printf(s, ",nouser_xattr");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
+ seq_printf(s, ",mapchars");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
+ seq_printf(s, ",sfu");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ seq_printf(s, ",nobrl");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
+ seq_printf(s, ",cifsacl");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
+ seq_printf(s, ",dynperm");
+ if (root->d_sb->s_flags & MS_POSIXACL)
+ seq_printf(s, ",acl");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
+ seq_printf(s, ",mfsymlinks");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
+ seq_printf(s, ",fsc");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
+ seq_printf(s, ",nostrictsync");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
+ seq_printf(s, ",noperm");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
+ seq_printf(s, ",strictcache");
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
+ seq_printf(s, ",backupuid=%u", cifs_sb->mnt_backupuid);
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
+ seq_printf(s, ",backupgid=%u", cifs_sb->mnt_backupgid);
+
+ seq_printf(s, ",rsize=%u", cifs_sb->rsize);
+ seq_printf(s, ",wsize=%u", cifs_sb->wsize);
+ /* convert actimeo and display it in seconds */
+ seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
+
+ return 0;
+}
+
+static void cifs_umount_begin(struct super_block *sb)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ struct cifs_tcon *tcon;
+
+ if (cifs_sb == NULL)
+ return;
+
+ tcon = cifs_sb_master_tcon(cifs_sb);
+
+ spin_lock(&cifs_tcp_ses_lock);
+ if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
+ /* we have other mounts to same share or we have
+ already tried to force umount this and woken up
+ all waiting network requests, nothing to do */
+ spin_unlock(&cifs_tcp_ses_lock);
+ return;
+ } else if (tcon->tc_count == 1)
+ tcon->tidStatus = CifsExiting;
+ spin_unlock(&cifs_tcp_ses_lock);
+
+ /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
+ /* cancel_notify_requests(tcon); */
+ if (tcon->ses && tcon->ses->server) {
+ cFYI(1, "wake up tasks now - umount begin not complete");
+ wake_up_all(&tcon->ses->server->request_q);
+ wake_up_all(&tcon->ses->server->response_q);
+ msleep(1); /* yield */
+ /* we have to kick the requests once more */
+ wake_up_all(&tcon->ses->server->response_q);
+ msleep(1);
+ }
+
+ return;
+}
+
+#ifdef CONFIG_CIFS_STATS2
+static int cifs_show_stats(struct seq_file *s, struct dentry *root)
+{
+ /* BB FIXME */
+ return 0;
+}
+#endif
+
+static int cifs_remount(struct super_block *sb, int *flags, char *data)
+{
+ *flags |= MS_NODIRATIME;
+ return 0;
+}
+
+static int cifs_drop_inode(struct inode *inode)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+
+ /* no serverino => unconditional eviction */
+ return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
+ generic_drop_inode(inode);
+}
+
+static const struct super_operations cifs_super_ops = {
+ .statfs = cifs_statfs,
+ .alloc_inode = cifs_alloc_inode,
+ .destroy_inode = cifs_destroy_inode,
+ .drop_inode = cifs_drop_inode,
+ .evict_inode = cifs_evict_inode,
+/* .delete_inode = cifs_delete_inode, */ /* Do not need above
+ function unless later we add lazy close of inodes or unless the
+ kernel forgets to call us with the same number of releases (closes)
+ as opens */
+ .show_options = cifs_show_options,
+ .umount_begin = cifs_umount_begin,
+ .remount_fs = cifs_remount,
+#ifdef CONFIG_CIFS_STATS2
+ .show_stats = cifs_show_stats,
+#endif
+};
+
+/*
+ * Get root dentry from superblock according to prefix path mount option.
+ * Return dentry with refcount + 1 on success and NULL otherwise.
+ */
+static struct dentry *
+cifs_get_root(struct smb_vol *vol, struct super_block *sb)
+{
+ struct dentry *dentry;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ char *full_path = NULL;
+ char *s, *p;
+ char sep;
+
+ full_path = cifs_build_path_to_root(vol, cifs_sb,
+ cifs_sb_master_tcon(cifs_sb));
+ if (full_path == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ cFYI(1, "Get root dentry for %s", full_path);
+
+ sep = CIFS_DIR_SEP(cifs_sb);
+ dentry = dget(sb->s_root);
+ p = s = full_path;
+
+ do {
+ struct inode *dir = dentry->d_inode;
+ struct dentry *child;
+
+ if (!dir) {
+ dput(dentry);
+ dentry = ERR_PTR(-ENOENT);
+ break;
+ }
+ if (!S_ISDIR(dir->i_mode)) {
+ dput(dentry);
+ dentry = ERR_PTR(-ENOTDIR);
+ break;
+ }
+
+ /* skip separators */
+ while (*s == sep)
+ s++;
+ if (!*s)
+ break;
+ p = s++;
+ /* next separator */
+ while (*s && *s != sep)
+ s++;
+
+ mutex_lock(&dir->i_mutex);
+ child = lookup_one_len(p, dentry, s - p);
+ mutex_unlock(&dir->i_mutex);
+ dput(dentry);
+ dentry = child;
+ } while (!IS_ERR(dentry));
+ kfree(full_path);
+ return dentry;
+}
+
+static int cifs_set_super(struct super_block *sb, void *data)
+{
+ struct cifs_mnt_data *mnt_data = data;
+ sb->s_fs_info = mnt_data->cifs_sb;
+ return set_anon_super(sb, NULL);
+}
+
+static struct dentry *
+cifs_do_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
+{
+ int rc;
+ struct super_block *sb;
+ struct cifs_sb_info *cifs_sb;
+ struct smb_vol *volume_info;
+ struct cifs_mnt_data mnt_data;
+ struct dentry *root;
+
+ cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
+
+ volume_info = cifs_get_volume_info((char *)data, dev_name);
+ if (IS_ERR(volume_info))
+ return ERR_CAST(volume_info);
+
+ cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
+ if (cifs_sb == NULL) {
+ root = ERR_PTR(-ENOMEM);
+ goto out_nls;
+ }
+
+ cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
+ if (cifs_sb->mountdata == NULL) {
+ root = ERR_PTR(-ENOMEM);
+ goto out_cifs_sb;
+ }
+
+ cifs_setup_cifs_sb(volume_info, cifs_sb);
+
+ rc = cifs_mount(cifs_sb, volume_info);
+ if (rc) {
+ if (!(flags & MS_SILENT))
+ cERROR(1, "cifs_mount failed w/return code = %d", rc);
+ root = ERR_PTR(rc);
+ goto out_mountdata;
+ }
+
+ mnt_data.vol = volume_info;
+ mnt_data.cifs_sb = cifs_sb;
+ mnt_data.flags = flags;
+
+ sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
+ if (IS_ERR(sb)) {
+ root = ERR_CAST(sb);
+ cifs_umount(cifs_sb);
+ goto out;
+ }
+
+ if (sb->s_root) {
+ cFYI(1, "Use existing superblock");
+ cifs_umount(cifs_sb);
+ } else {
+ sb->s_flags = flags;
+ /* BB should we make this contingent on mount parm? */
+ sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
+
+ rc = cifs_read_super(sb);
+ if (rc) {
+ root = ERR_PTR(rc);
+ goto out_super;
+ }
+
+ sb->s_flags |= MS_ACTIVE;
+ }
+
+ root = cifs_get_root(volume_info, sb);
+ if (IS_ERR(root))
+ goto out_super;
+
+ cFYI(1, "dentry root is: %p", root);
+ goto out;
+
+out_super:
+ deactivate_locked_super(sb);
+out:
+ cifs_cleanup_volume_info(volume_info);
+ return root;
+
+out_mountdata:
+ kfree(cifs_sb->mountdata);
+out_cifs_sb:
+ kfree(cifs_sb);
+out_nls:
+ unload_nls(volume_info->local_nls);
+ goto out;
+}
+
+static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
+{
+ struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
+ ssize_t written;
+ int rc;
+
+ written = generic_file_aio_write(iocb, iov, nr_segs, pos);
+
+ if (CIFS_I(inode)->clientCanCacheAll)
+ return written;
+
+ rc = filemap_fdatawrite(inode->i_mapping);
+ if (rc)
+ cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
+
+ return written;
+}
+
+static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
+{
+ /*
+ * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
+ * the cached file length
+ */
+ if (origin != SEEK_SET && origin != SEEK_CUR) {
+ int rc;
+ struct inode *inode = file->f_path.dentry->d_inode;
+
+ /*
+ * We need to be sure that all dirty pages are written and the
+ * server has the newest file length.
+ */
+ if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
+ inode->i_mapping->nrpages != 0) {
+ rc = filemap_fdatawait(inode->i_mapping);
+ if (rc) {
+ mapping_set_error(inode->i_mapping, rc);
+ return rc;
+ }
+ }
+ /*
+ * Some applications poll for the file length in this strange
+ * way so we must seek to end on non-oplocked files by
+ * setting the revalidate time to zero.
+ */
+ CIFS_I(inode)->time = 0;
+
+ rc = cifs_revalidate_file_attr(file);
+ if (rc < 0)
+ return (loff_t)rc;
+ }
+ return generic_file_llseek(file, offset, origin);
+}
+
+static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
+{
+ /* note that this is called by vfs setlease with lock_flocks held
+ to protect *lease from going away */
+ struct inode *inode = file->f_path.dentry->d_inode;
+ struct cifsFileInfo *cfile = file->private_data;
+
+ if (!(S_ISREG(inode->i_mode)))
+ return -EINVAL;
+
+ /* check if file is oplocked */
+ if (((arg == F_RDLCK) &&
+ (CIFS_I(inode)->clientCanCacheRead)) ||
+ ((arg == F_WRLCK) &&
+ (CIFS_I(inode)->clientCanCacheAll)))
+ return generic_setlease(file, arg, lease);
+ else if (tlink_tcon(cfile->tlink)->local_lease &&
+ !CIFS_I(inode)->clientCanCacheRead)
+ /* If the server claims to support oplock on this
+ file, then we still need to check oplock even
+ if the local_lease mount option is set, but there
+ are servers which do not support oplock for which
+ this mount option may be useful if the user
+ knows that the file won't be changed on the server
+ by anyone else */
+ return generic_setlease(file, arg, lease);
+ else
+ return -EAGAIN;
+}
+
+struct file_system_type cifs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "cifs",
+ .mount = cifs_do_mount,
+ .kill_sb = cifs_kill_sb,
+ /* .fs_flags */
+};
+const struct inode_operations cifs_dir_inode_ops = {
+ .create = cifs_create,
+ .lookup = cifs_lookup,
+ .getattr = cifs_getattr,
+ .unlink = cifs_unlink,
+ .link = cifs_hardlink,
+ .mkdir = cifs_mkdir,
+ .rmdir = cifs_rmdir,
+ .rename = cifs_rename,
+ .permission = cifs_permission,
+/* revalidate:cifs_revalidate, */
+ .setattr = cifs_setattr,
+ .symlink = cifs_symlink,
+ .mknod = cifs_mknod,
+#ifdef CONFIG_CIFS_XATTR
+ .setxattr = cifs_setxattr,
+ .getxattr = cifs_getxattr,
+ .listxattr = cifs_listxattr,
+ .removexattr = cifs_removexattr,
+#endif
+};
+
+const struct inode_operations cifs_file_inode_ops = {
+/* revalidate:cifs_revalidate, */
+ .setattr = cifs_setattr,
+ .getattr = cifs_getattr, /* do we need this anymore? */
+ .rename = cifs_rename,
+ .permission = cifs_permission,
+#ifdef CONFIG_CIFS_XATTR
+ .setxattr = cifs_setxattr,
+ .getxattr = cifs_getxattr,
+ .listxattr = cifs_listxattr,
+ .removexattr = cifs_removexattr,
+#endif
+};
+
+const struct inode_operations cifs_symlink_inode_ops = {
+ .readlink = generic_readlink,
+ .follow_link = cifs_follow_link,
+ .put_link = cifs_put_link,
+ .permission = cifs_permission,
+ /* BB add the following two eventually */
+ /* revalidate: cifs_revalidate,
+ setattr: cifs_notify_change, *//* BB do we need notify change */
+#ifdef CONFIG_CIFS_XATTR
+ .setxattr = cifs_setxattr,
+ .getxattr = cifs_getxattr,
+ .listxattr = cifs_listxattr,
+ .removexattr = cifs_removexattr,
+#endif
+};
+
+const struct file_operations cifs_file_ops = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = cifs_file_aio_write,
+ .open = cifs_open,
+ .release = cifs_close,
+ .lock = cifs_lock,
+ .fsync = cifs_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_mmap,
+ .splice_read = generic_file_splice_read,
+ .llseek = cifs_llseek,
+#ifdef CONFIG_CIFS_POSIX
+ .unlocked_ioctl = cifs_ioctl,
+#endif /* CONFIG_CIFS_POSIX */
+ .setlease = cifs_setlease,
+};
+
+const struct file_operations cifs_file_strict_ops = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = cifs_strict_readv,
+ .aio_write = cifs_strict_writev,
+ .open = cifs_open,
+ .release = cifs_close,
+ .lock = cifs_lock,
+ .fsync = cifs_strict_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_strict_mmap,
+ .splice_read = generic_file_splice_read,
+ .llseek = cifs_llseek,
+#ifdef CONFIG_CIFS_POSIX
+ .unlocked_ioctl = cifs_ioctl,
+#endif /* CONFIG_CIFS_POSIX */
+ .setlease = cifs_setlease,
+};
+
+const struct file_operations cifs_file_direct_ops = {
+ /* BB reevaluate whether they can be done with directio, no cache */
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = cifs_user_readv,
+ .aio_write = cifs_user_writev,
+ .open = cifs_open,
+ .release = cifs_close,
+ .lock = cifs_lock,
+ .fsync = cifs_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_mmap,
+ .splice_read = generic_file_splice_read,
+#ifdef CONFIG_CIFS_POSIX
+ .unlocked_ioctl = cifs_ioctl,
+#endif /* CONFIG_CIFS_POSIX */
+ .llseek = cifs_llseek,
+ .setlease = cifs_setlease,
+};
+
+const struct file_operations cifs_file_nobrl_ops = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = cifs_file_aio_write,
+ .open = cifs_open,
+ .release = cifs_close,
+ .fsync = cifs_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_mmap,
+ .splice_read = generic_file_splice_read,
+ .llseek = cifs_llseek,
+#ifdef CONFIG_CIFS_POSIX
+ .unlocked_ioctl = cifs_ioctl,
+#endif /* CONFIG_CIFS_POSIX */
+ .setlease = cifs_setlease,
+};
+
+const struct file_operations cifs_file_strict_nobrl_ops = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = cifs_strict_readv,
+ .aio_write = cifs_strict_writev,
+ .open = cifs_open,
+ .release = cifs_close,
+ .fsync = cifs_strict_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_strict_mmap,
+ .splice_read = generic_file_splice_read,
+ .llseek = cifs_llseek,
+#ifdef CONFIG_CIFS_POSIX
+ .unlocked_ioctl = cifs_ioctl,
+#endif /* CONFIG_CIFS_POSIX */
+ .setlease = cifs_setlease,
+};
+
+const struct file_operations cifs_file_direct_nobrl_ops = {
+ /* BB reevaluate whether they can be done with directio, no cache */
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = cifs_user_readv,
+ .aio_write = cifs_user_writev,
+ .open = cifs_open,
+ .release = cifs_close,
+ .fsync = cifs_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_mmap,
+ .splice_read = generic_file_splice_read,
+#ifdef CONFIG_CIFS_POSIX
+ .unlocked_ioctl = cifs_ioctl,
+#endif /* CONFIG_CIFS_POSIX */
+ .llseek = cifs_llseek,
+ .setlease = cifs_setlease,
+};
+
+const struct file_operations cifs_dir_ops = {
+ .readdir = cifs_readdir,
+ .release = cifs_closedir,
+ .read = generic_read_dir,
+ .unlocked_ioctl = cifs_ioctl,
+ .llseek = generic_file_llseek,
+};
+
+static void
+cifs_init_once(void *inode)
+{
+ struct cifsInodeInfo *cifsi = inode;
+
+ inode_init_once(&cifsi->vfs_inode);
+ INIT_LIST_HEAD(&cifsi->llist);
+ mutex_init(&cifsi->lock_mutex);
+}
+
+static int
+cifs_init_inodecache(void)
+{
+ cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
+ sizeof(struct cifsInodeInfo),
+ 0, (SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD),
+ cifs_init_once);
+ if (cifs_inode_cachep == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void
+cifs_destroy_inodecache(void)
+{
+ kmem_cache_destroy(cifs_inode_cachep);
+}
+
+static int
+cifs_init_request_bufs(void)
+{
+ if (CIFSMaxBufSize < 8192) {
+ /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
+ Unicode path name has to fit in any SMB/CIFS path based frames */
+ CIFSMaxBufSize = 8192;
+ } else if (CIFSMaxBufSize > 1024*127) {
+ CIFSMaxBufSize = 1024 * 127;
+ } else {
+ CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
+ }
+/* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
+ cifs_req_cachep = kmem_cache_create("cifs_request",
+ CIFSMaxBufSize +
+ MAX_CIFS_HDR_SIZE, 0,
+ SLAB_HWCACHE_ALIGN, NULL);
+ if (cifs_req_cachep == NULL)
+ return -ENOMEM;
+
+ if (cifs_min_rcv < 1)
+ cifs_min_rcv = 1;
+ else if (cifs_min_rcv > 64) {
+ cifs_min_rcv = 64;
+ cERROR(1, "cifs_min_rcv set to maximum (64)");
+ }
+
+ cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
+ cifs_req_cachep);
+
+ if (cifs_req_poolp == NULL) {
+ kmem_cache_destroy(cifs_req_cachep);
+ return -ENOMEM;
+ }
+ /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
+ almost all handle based requests (but not write response, nor is it
+ sufficient for path based requests). A smaller size would have
+ been more efficient (compacting multiple slab items on one 4k page)
+ for the case in which debug was on, but this larger size allows
+ more SMBs to use small buffer alloc and is still much more
+ efficient to alloc 1 per page off the slab compared to 17K (5page)
+ alloc of large cifs buffers even when page debugging is on */
+ cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
+ MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
+ NULL);
+ if (cifs_sm_req_cachep == NULL) {
+ mempool_destroy(cifs_req_poolp);
+ kmem_cache_destroy(cifs_req_cachep);
+ return -ENOMEM;
+ }
+
+ if (cifs_min_small < 2)
+ cifs_min_small = 2;
+ else if (cifs_min_small > 256) {
+ cifs_min_small = 256;
+ cFYI(1, "cifs_min_small set to maximum (256)");
+ }
+
+ cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
+ cifs_sm_req_cachep);
+
+ if (cifs_sm_req_poolp == NULL) {
+ mempool_destroy(cifs_req_poolp);
+ kmem_cache_destroy(cifs_req_cachep);
+ kmem_cache_destroy(cifs_sm_req_cachep);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void
+cifs_destroy_request_bufs(void)
+{
+ mempool_destroy(cifs_req_poolp);
+ kmem_cache_destroy(cifs_req_cachep);
+ mempool_destroy(cifs_sm_req_poolp);
+ kmem_cache_destroy(cifs_sm_req_cachep);
+}
+
+static int
+cifs_init_mids(void)
+{
+ cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
+ sizeof(struct mid_q_entry), 0,
+ SLAB_HWCACHE_ALIGN, NULL);
+ if (cifs_mid_cachep == NULL)
+ return -ENOMEM;
+
+ /* 3 is a reasonable minimum number of simultaneous operations */
+ cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
+ if (cifs_mid_poolp == NULL) {
+ kmem_cache_destroy(cifs_mid_cachep);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void
+cifs_destroy_mids(void)
+{
+ mempool_destroy(cifs_mid_poolp);
+ kmem_cache_destroy(cifs_mid_cachep);
+}
+
+static int __init
+init_cifs(void)
+{
+ int rc = 0;
+ cifs_proc_init();
+ INIT_LIST_HEAD(&cifs_tcp_ses_list);
+#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
+ INIT_LIST_HEAD(&GlobalDnotifyReqList);
+ INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
+#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
+/*
+ * Initialize Global counters
+ */
+ atomic_set(&sesInfoAllocCount, 0);
+ atomic_set(&tconInfoAllocCount, 0);
+ atomic_set(&tcpSesAllocCount, 0);
+ atomic_set(&tcpSesReconnectCount, 0);
+ atomic_set(&tconInfoReconnectCount, 0);
+
+ atomic_set(&bufAllocCount, 0);
+ atomic_set(&smBufAllocCount, 0);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_set(&totBufAllocCount, 0);
+ atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
+
+ atomic_set(&midCount, 0);
+ GlobalCurrentXid = 0;
+ GlobalTotalActiveXid = 0;
+ GlobalMaxActiveXid = 0;
+ spin_lock_init(&cifs_tcp_ses_lock);
+ spin_lock_init(&cifs_file_list_lock);
+ spin_lock_init(&GlobalMid_Lock);
+
+ if (cifs_max_pending < 2) {
+ cifs_max_pending = 2;
+ cFYI(1, "cifs_max_pending set to min of 2");
+ } else if (cifs_max_pending > CIFS_MAX_REQ) {
+ cifs_max_pending = CIFS_MAX_REQ;
+ cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ);
+ }
+
+ cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
+ if (!cifsiod_wq) {
+ rc = -ENOMEM;
+ goto out_clean_proc;
+ }
+
+ rc = cifs_fscache_register();
+ if (rc)
+ goto out_destroy_wq;
+
+ rc = cifs_init_inodecache();
+ if (rc)
+ goto out_unreg_fscache;
+
+ rc = cifs_init_mids();
+ if (rc)
+ goto out_destroy_inodecache;
+
+ rc = cifs_init_request_bufs();
+ if (rc)
+ goto out_destroy_mids;
+
+#ifdef CONFIG_CIFS_UPCALL
+ rc = register_key_type(&cifs_spnego_key_type);
+ if (rc)
+ goto out_destroy_request_bufs;
+#endif /* CONFIG_CIFS_UPCALL */
+
+#ifdef CONFIG_CIFS_ACL
+ rc = init_cifs_idmap();
+ if (rc)
+ goto out_register_key_type;
+#endif /* CONFIG_CIFS_ACL */
+
+ rc = register_filesystem(&cifs_fs_type);
+ if (rc)
+ goto out_init_cifs_idmap;
+
+ return 0;
+
+out_init_cifs_idmap:
+#ifdef CONFIG_CIFS_ACL
+ exit_cifs_idmap();
+out_register_key_type:
+#endif
+#ifdef CONFIG_CIFS_UPCALL
+ unregister_key_type(&cifs_spnego_key_type);
+out_destroy_request_bufs:
+#endif
+ cifs_destroy_request_bufs();
+out_destroy_mids:
+ cifs_destroy_mids();
+out_destroy_inodecache:
+ cifs_destroy_inodecache();
+out_unreg_fscache:
+ cifs_fscache_unregister();
+out_destroy_wq:
+ destroy_workqueue(cifsiod_wq);
+out_clean_proc:
+ cifs_proc_clean();
+ return rc;
+}
+
+static void __exit
+exit_cifs(void)
+{
+ cFYI(DBG2, "exit_cifs");
+ unregister_filesystem(&cifs_fs_type);
+ cifs_dfs_release_automount_timer();
+#ifdef CONFIG_CIFS_ACL
+ cifs_destroy_idmaptrees();
+ exit_cifs_idmap();
+#endif
+#ifdef CONFIG_CIFS_UPCALL
+ unregister_key_type(&cifs_spnego_key_type);
+#endif
+ cifs_destroy_request_bufs();
+ cifs_destroy_mids();
+ cifs_destroy_inodecache();
+ cifs_fscache_unregister();
+ destroy_workqueue(cifsiod_wq);
+ cifs_proc_clean();
+}
+
+MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
+MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
+MODULE_DESCRIPTION
+ ("VFS to access servers complying with the SNIA CIFS Specification "
+ "e.g. Samba and Windows");
+MODULE_VERSION(CIFS_VERSION);
+module_init(init_cifs)
+module_exit(exit_cifs)