Merge branch 'topic/core-cleanup' into for-linus
[safe/jmp/linux-2.6] / fs / cifs / cifsfs.c
index 5df93fd..ad235d6 100644 (file)
@@ -35,6 +35,7 @@
 #include <linux/delay.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
+#include <linux/smp_lock.h>
 #include "cifsfs.h"
 #include "cifspdu.h"
 #define DECLARE_GLOBALS_HERE
@@ -49,7 +50,7 @@
 #define CIFS_MAGIC_NUMBER 0xFF534D42   /* the first four bytes of SMB PDUs */
 
 #ifdef CONFIG_CIFS_QUOTA
-static struct quotactl_ops cifs_quotactl_ops;
+static const struct quotactl_ops cifs_quotactl_ops;
 #endif /* QUOTA */
 
 int cifsFYI = 0;
@@ -63,10 +64,6 @@ unsigned int multiuser_mount = 0;
 unsigned int extended_security = CIFSSEC_DEF;
 /* unsigned int ntlmv2_support = 0; */
 unsigned int sign_CIFS_PDUs = 1;
-extern struct task_struct *oplockThread; /* remove sparse warning */
-struct task_struct *oplockThread = NULL;
-/* extern struct task_struct * dnotifyThread; remove sparse warning */
-static struct task_struct *dnotifyThread = NULL;
 static const struct super_operations cifs_super_ops;
 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
 module_param(CIFSMaxBufSize, int, 0);
@@ -97,9 +94,6 @@ cifs_read_super(struct super_block *sb, void *data,
 {
        struct inode *inode;
        struct cifs_sb_info *cifs_sb;
-#ifdef CONFIG_CIFS_DFS_UPCALL
-       int len;
-#endif
        int rc = 0;
 
        /* BB should we make this contingent on mount parm? */
@@ -109,6 +103,12 @@ cifs_read_super(struct super_block *sb, void *data,
        if (cifs_sb == NULL)
                return -ENOMEM;
 
+       rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
+       if (rc) {
+               kfree(cifs_sb);
+               return rc;
+       }
+
 #ifdef CONFIG_CIFS_DFS_UPCALL
        /* copy mount params to sb for use in submounts */
        /* BB: should we move this after the mount so we
@@ -117,15 +117,18 @@ cifs_read_super(struct super_block *sb, void *data,
         * complex operation (mount), and in case of fail
         * just exit instead of doing mount and attempting
         * undo it if this copy fails?*/
-       len = strlen(data);
-       cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
-       if (cifs_sb->mountdata == NULL) {
-               kfree(sb->s_fs_info);
-               sb->s_fs_info = NULL;
-               return -ENOMEM;
+       if (data) {
+               int len = strlen(data);
+               cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
+               if (cifs_sb->mountdata == NULL) {
+                       bdi_destroy(&cifs_sb->bdi);
+                       kfree(sb->s_fs_info);
+                       sb->s_fs_info = NULL;
+                       return -ENOMEM;
+               }
+               strncpy(cifs_sb->mountdata, data, len + 1);
+               cifs_sb->mountdata[len] = '\0';
        }
-       strncpy(cifs_sb->mountdata, data, len + 1);
-       cifs_sb->mountdata[len] = '\0';
 #endif
 
        rc = cifs_mount(sb, cifs_sb, data, devname);
@@ -139,6 +142,7 @@ cifs_read_super(struct super_block *sb, void *data,
 
        sb->s_magic = CIFS_MAGIC_NUMBER;
        sb->s_op = &cifs_super_ops;
+       sb->s_bdi = &cifs_sb->bdi;
 /*     if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
            sb->s_blocksize =
                cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
@@ -147,7 +151,7 @@ cifs_read_super(struct super_block *sb, void *data,
 #endif
        sb->s_blocksize = CIFS_MAX_MSGSIZE;
        sb->s_blocksize_bits = 14;      /* default 2**14 = CIFS_MAX_MSGSIZE */
-       inode = cifs_iget(sb, ROOT_I);
+       inode = cifs_root_iget(sb, ROOT_I);
 
        if (IS_ERR(inode)) {
                rc = PTR_ERR(inode);
@@ -176,6 +180,8 @@ out_no_root:
        if (inode)
                iput(inode);
 
+       cifs_umount(sb, cifs_sb);
+
 out_mount_failed:
        if (cifs_sb) {
 #ifdef CONFIG_CIFS_DFS_UPCALL
@@ -184,8 +190,8 @@ out_mount_failed:
                        cifs_sb->mountdata = NULL;
                }
 #endif
-               if (cifs_sb->local_nls)
-                       unload_nls(cifs_sb->local_nls);
+               unload_nls(cifs_sb->local_nls);
+               bdi_destroy(&cifs_sb->bdi);
                kfree(cifs_sb);
        }
        return rc;
@@ -203,6 +209,9 @@ cifs_put_super(struct super_block *sb)
                cFYI(1, ("Empty cifs superblock info passed to unmount"));
                return;
        }
+
+       lock_kernel();
+
        rc = cifs_umount(sb, cifs_sb);
        if (rc)
                cERROR(1, ("cifs_umount failed with return code %d", rc));
@@ -214,8 +223,10 @@ cifs_put_super(struct super_block *sb)
 #endif
 
        unload_nls(cifs_sb->local_nls);
+       bdi_destroy(&cifs_sb->bdi);
        kfree(cifs_sb);
-       return;
+
+       unlock_kernel();
 }
 
 static int
@@ -268,15 +279,18 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
        return 0;
 }
 
-static int cifs_permission(struct inode *inode, int mask, struct nameidata *nd)
+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)
-               return 0;
-       else /* file mode might have been restricted at mount time
+       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 */
@@ -300,7 +314,6 @@ cifs_alloc_inode(struct super_block *sb)
        if (!cifs_inode)
                return NULL;
        cifs_inode->cifsAttrs = 0x20;   /* default */
-       atomic_set(&cifs_inode->inUse, 0);
        cifs_inode->time = 0;
        cifs_inode->write_behind_rc = 0;
        /* Until the file is open and we have gotten oplock
@@ -308,7 +321,10 @@ cifs_alloc_inode(struct super_block *sb)
        file data or metadata */
        cifs_inode->clientCanCacheRead = false;
        cifs_inode->clientCanCacheAll = false;
+       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;
 
        /* Can not set i_flags here - they get immediately overwritten
           to zero by the VFS */
@@ -323,6 +339,27 @@ cifs_destroy_inode(struct inode *inode)
        kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
 }
 
+static void
+cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
+{
+       seq_printf(s, ",addr=");
+
+       switch (server->addr.sockAddr.sin_family) {
+       case AF_INET:
+               seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr);
+               break;
+       case AF_INET6:
+               seq_printf(s, "%pI6",
+                          &server->addr.sockAddr6.sin6_addr.s6_addr);
+               if (server->addr.sockAddr6.sin6_scope_id)
+                       seq_printf(s, "%%%u",
+                                  server->addr.sockAddr6.sin6_scope_id);
+               break;
+       default:
+               seq_printf(s, "(unknown)");
+       }
+}
+
 /*
  * cifs_show_options() is for displaying mount options in /proc/mounts.
  * Not all settable options are displayed but most of the important
@@ -331,66 +368,67 @@ cifs_destroy_inode(struct inode *inode)
 static int
 cifs_show_options(struct seq_file *s, struct vfsmount *m)
 {
-       struct cifs_sb_info *cifs_sb;
+       struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
+       struct cifsTconInfo *tcon = cifs_sb->tcon;
 
-       cifs_sb = CIFS_SB(m->mnt_sb);
+       seq_printf(s, ",unc=%s", tcon->treeName);
+       if (tcon->ses->userName)
+               seq_printf(s, ",username=%s", tcon->ses->userName);
+       if (tcon->ses->domainName)
+               seq_printf(s, ",domain=%s", tcon->ses->domainName);
 
-       if (cifs_sb) {
-               if (cifs_sb->tcon) {
-/* BB add prepath to mount options displayed */
-                       seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName);
-                       if (cifs_sb->tcon->ses) {
-                               if (cifs_sb->tcon->ses->userName)
-                                       seq_printf(s, ",username=%s",
-                                          cifs_sb->tcon->ses->userName);
-                               if (cifs_sb->tcon->ses->domainName)
-                                       seq_printf(s, ",domain=%s",
-                                          cifs_sb->tcon->ses->domainName);
-                       }
-                       if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) ||
-                          !(cifs_sb->tcon->unix_ext))
-                               seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
-                       if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) ||
-                          !(cifs_sb->tcon->unix_ext))
-                               seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
-                       if (!cifs_sb->tcon->unix_ext) {
-                               seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
+       seq_printf(s, ",uid=%d", 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=%d", 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%o,dir_mode=0%o",
                                           cifs_sb->mnt_file_mode,
                                           cifs_sb->mnt_dir_mode);
-                       }
-                       if (cifs_sb->tcon->seal)
-                               seq_printf(s, ",seal");
-                       if (cifs_sb->tcon->nocase)
-                               seq_printf(s, ",nocase");
-                       if (cifs_sb->tcon->retry)
-                               seq_printf(s, ",hard");
-               }
-               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_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 (m->mnt_sb->s_flags & MS_POSIXACL)
-                       seq_printf(s, ",acl");
-
-               seq_printf(s, ",rsize=%d", cifs_sb->rsize);
-               seq_printf(s, ",wsize=%d", cifs_sb->wsize);
-       }
+       if (tcon->seal)
+               seq_printf(s, ",seal");
+       if (tcon->nocase)
+               seq_printf(s, ",nocase");
+       if (tcon->retry)
+               seq_printf(s, ",hard");
+       if (cifs_sb->prepath)
+               seq_printf(s, ",prepath=%s", cifs_sb->prepath);
+       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_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 (m->mnt_sb->s_flags & MS_POSIXACL)
+               seq_printf(s, ",acl");
+
+       seq_printf(s, ",rsize=%d", cifs_sb->rsize);
+       seq_printf(s, ",wsize=%d", cifs_sb->wsize);
+
        return 0;
 }
 
@@ -412,9 +450,8 @@ int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid,
        xid = GetXid();
        if (pTcon) {
                cFYI(1, ("set type: 0x%x id: %d", quota_type, qid));
-       } else {
+       } else
                rc = -EIO;
-       }
 
        FreeXid(xid);
        return rc;
@@ -436,9 +473,8 @@ int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid,
        xid = GetXid();
        if (pTcon) {
                cFYI(1, ("set type: 0x%x id: %d", quota_type, qid));
-       } else {
+       } else
                rc = -EIO;
-       }
 
        FreeXid(xid);
        return rc;
@@ -459,9 +495,8 @@ int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation)
        xid = GetXid();
        if (pTcon) {
                cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation));
-       } else {
+       } else
                rc = -EIO;
-       }
 
        FreeXid(xid);
        return rc;
@@ -474,23 +509,22 @@ int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats)
        struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
        struct cifsTconInfo *pTcon;
 
-       if (cifs_sb) {
+       if (cifs_sb)
                pTcon = cifs_sb->tcon;
-       } else {
+       else
                return -EIO;
-       }
+
        xid = GetXid();
        if (pTcon) {
                cFYI(1, ("pqstats %p", qstats));
-       } else {
+       } else
                rc = -EIO;
-       }
 
        FreeXid(xid);
        return rc;
 }
 
-static struct quotactl_ops cifs_quotactl_ops = {
+static const struct quotactl_ops cifs_quotactl_ops = {
        .set_xquota     = cifs_xquota_set,
        .get_xquota     = cifs_xquota_get,
        .set_xstate     = cifs_xstate_set,
@@ -509,10 +543,17 @@ static void cifs_umount_begin(struct super_block *sb)
        tcon = cifs_sb->tcon;
        if (tcon == NULL)
                return;
-       down(&tcon->tconSem);
-       if (atomic_read(&tcon->useCount) == 1)
+
+       read_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 */
+               read_unlock(&cifs_tcp_ses_lock);
+               return;
+       } else if (tcon->tc_count == 1)
                tcon->tidStatus = CifsExiting;
-       up(&tcon->tconSem);
+       read_unlock(&cifs_tcp_ses_lock);
 
        /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
        /* cancel_notify_requests(tcon); */
@@ -525,7 +566,6 @@ static void cifs_umount_begin(struct super_block *sb)
                wake_up_all(&tcon->ses->server->response_q);
                msleep(1);
        }
-/* BB FIXME - finish add checks for tidStatus BB */
 
        return;
 }
@@ -578,12 +618,12 @@ cifs_get_sb(struct file_system_type *fs_type,
 
        rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
        if (rc) {
-               up_write(&sb->s_umount);
-               deactivate_super(sb);
+               deactivate_locked_super(sb);
                return rc;
        }
        sb->s_flags |= MS_ACTIVE;
-       return simple_set_mnt(mnt, sb);
+       simple_set_mnt(mnt, sb);
+       return 0;
 }
 
 static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
@@ -609,13 +649,44 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
                   setting the revalidate time to zero */
                CIFS_I(file->f_path.dentry->d_inode)->time = 0;
 
-               retval = cifs_revalidate(file->f_path.dentry);
+               retval = cifs_revalidate_file(file);
                if (retval < 0)
                        return (loff_t)retval;
        }
-       return remote_llseek(file, offset, origin);
+       return generic_file_llseek_unlocked(file, offset, origin);
 }
 
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
+{
+       /* note that this is called by vfs setlease with the BKL held
+          although I doubt that BKL is needed here in cifs */
+       struct inode *inode = file->f_path.dentry->d_inode;
+
+       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 (CIFS_SB(inode->i_sb)->tcon->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;
+}
+#endif
+
 struct file_system_type cifs_fs_type = {
        .owner = THIS_MODULE,
        .name = "cifs",
@@ -693,12 +764,12 @@ const struct file_operations cifs_file_ops = {
 #endif /* CONFIG_CIFS_POSIX */
 
 #ifdef CONFIG_CIFS_EXPERIMENTAL
-       .dir_notify = cifs_dir_notify,
+       .setlease = cifs_setlease,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
 const struct file_operations cifs_file_direct_ops = {
-       /* no mmap, no aio, no readv -
+       /* no aio, no readv -
           BB reevaluate whether they can be done with directio, no cache */
        .read = cifs_user_read,
        .write = cifs_user_write,
@@ -707,13 +778,14 @@ const struct file_operations cifs_file_direct_ops = {
        .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,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
-       .dir_notify = cifs_dir_notify,
+       .setlease = cifs_setlease,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 const struct file_operations cifs_file_nobrl_ops = {
@@ -733,7 +805,7 @@ const struct file_operations cifs_file_nobrl_ops = {
 #endif /* CONFIG_CIFS_POSIX */
 
 #ifdef CONFIG_CIFS_EXPERIMENTAL
-       .dir_notify = cifs_dir_notify,
+       .setlease = cifs_setlease,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
@@ -746,13 +818,14 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
        .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,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
-       .dir_notify = cifs_dir_notify,
+       .setlease = cifs_setlease,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
@@ -760,14 +833,12 @@ const struct file_operations cifs_dir_ops = {
        .readdir = cifs_readdir,
        .release = cifs_closedir,
        .read    = generic_read_dir,
-#ifdef CONFIG_CIFS_EXPERIMENTAL
-       .dir_notify = cifs_dir_notify,
-#endif /* CONFIG_CIFS_EXPERIMENTAL */
        .unlocked_ioctl  = cifs_ioctl,
+       .llseek = generic_file_llseek,
 };
 
 static void
-cifs_init_once(struct kmem_cache *cachep, void *inode)
+cifs_init_once(void *inode)
 {
        struct cifsInodeInfo *cifsi = inode;
 
@@ -911,116 +982,12 @@ cifs_destroy_mids(void)
        kmem_cache_destroy(cifs_oplock_cachep);
 }
 
-static int cifs_oplock_thread(void *dummyarg)
-{
-       struct oplock_q_entry *oplock_item;
-       struct cifsTconInfo *pTcon;
-       struct inode *inode;
-       __u16  netfid;
-       int rc, waitrc = 0;
-
-       set_freezable();
-       do {
-               if (try_to_freeze())
-                       continue;
-
-               spin_lock(&GlobalMid_Lock);
-               if (list_empty(&GlobalOplock_Q)) {
-                       spin_unlock(&GlobalMid_Lock);
-                       set_current_state(TASK_INTERRUPTIBLE);
-                       schedule_timeout(39*HZ);
-               } else {
-                       oplock_item = list_entry(GlobalOplock_Q.next,
-                               struct oplock_q_entry, qhead);
-                       if (oplock_item) {
-                               cFYI(1, ("found oplock item to write out"));
-                               pTcon = oplock_item->tcon;
-                               inode = oplock_item->pinode;
-                               netfid = oplock_item->netfid;
-                               spin_unlock(&GlobalMid_Lock);
-                               DeleteOplockQEntry(oplock_item);
-                               /* can not grab inode sem here since it would
-                               deadlock when oplock received on delete
-                               since vfs_unlink holds the i_mutex across
-                               the call */
-                               /* mutex_lock(&inode->i_mutex);*/
-                               if (S_ISREG(inode->i_mode)) {
-                                       rc =
-                                          filemap_fdatawrite(inode->i_mapping);
-                                       if (CIFS_I(inode)->clientCanCacheRead
-                                                                        == 0) {
-                                               waitrc = filemap_fdatawait(inode->i_mapping);
-                                               invalidate_remote_inode(inode);
-                                       }
-                                       if (rc == 0)
-                                               rc = waitrc;
-                               } else
-                                       rc = 0;
-                               /* mutex_unlock(&inode->i_mutex);*/
-                               if (rc)
-                                       CIFS_I(inode)->write_behind_rc = rc;
-                               cFYI(1, ("Oplock flush inode %p rc %d",
-                                       inode, rc));
-
-                               /* releasing stale oplock after recent reconnect
-                               of smb session using a now incorrect file
-                               handle is not a data integrity issue but do
-                               not bother sending an oplock release if session
-                               to server still is disconnected since oplock
-                               already released by the server in that case */
-                               if (pTcon->tidStatus != CifsNeedReconnect) {
-                                   rc = CIFSSMBLock(0, pTcon, netfid,
-                                           0 /* len */ , 0 /* offset */, 0,
-                                           0, LOCKING_ANDX_OPLOCK_RELEASE,
-                                           false /* wait flag */);
-                                       cFYI(1, ("Oplock release rc = %d", rc));
-                               }
-                       } else
-                               spin_unlock(&GlobalMid_Lock);
-                       set_current_state(TASK_INTERRUPTIBLE);
-                       schedule_timeout(1);  /* yield in case q were corrupt */
-               }
-       } while (!kthread_should_stop());
-
-       return 0;
-}
-
-static int cifs_dnotify_thread(void *dummyarg)
-{
-       struct list_head *tmp;
-       struct cifsSesInfo *ses;
-
-       do {
-               if (try_to_freeze())
-                       continue;
-               set_current_state(TASK_INTERRUPTIBLE);
-               schedule_timeout(15*HZ);
-               read_lock(&GlobalSMBSeslock);
-               /* check if any stuck requests that need
-                  to be woken up and wakeq so the
-                  thread can wake up and error out */
-               list_for_each(tmp, &GlobalSMBSessionList) {
-                       ses = list_entry(tmp, struct cifsSesInfo,
-                               cifsSessionList);
-                       if (ses && ses->server &&
-                            atomic_read(&ses->server->inFlight))
-                               wake_up_all(&ses->server->response_q);
-               }
-               read_unlock(&GlobalSMBSeslock);
-       } while (!kthread_should_stop());
-
-       return 0;
-}
-
 static int __init
 init_cifs(void)
 {
        int rc = 0;
        cifs_proc_init();
-/*     INIT_LIST_HEAD(&GlobalServerList);*/    /* BB not implemented yet */
-       INIT_LIST_HEAD(&GlobalSMBSessionList);
-       INIT_LIST_HEAD(&GlobalTreeConnectionList);
-       INIT_LIST_HEAD(&GlobalOplock_Q);
+       INIT_LIST_HEAD(&cifs_tcp_ses_list);
 #ifdef CONFIG_CIFS_EXPERIMENTAL
        INIT_LIST_HEAD(&GlobalDnotifyReqList);
        INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
@@ -1047,6 +1014,7 @@ init_cifs(void)
        GlobalMaxActiveXid = 0;
        memset(Local_System_Name, 0, 15);
        rwlock_init(&GlobalSMBSeslock);
+       rwlock_init(&cifs_tcp_ses_lock);
        spin_lock_init(&GlobalMid_Lock);
 
        if (cifs_max_pending < 2) {
@@ -1082,25 +1050,13 @@ init_cifs(void)
        if (rc)
                goto out_unregister_key_type;
 #endif
-       oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd");
-       if (IS_ERR(oplockThread)) {
-               rc = PTR_ERR(oplockThread);
-               cERROR(1, ("error %d create oplock thread", rc));
-               goto out_unregister_dfs_key_type;
-       }
-
-       dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd");
-       if (IS_ERR(dnotifyThread)) {
-               rc = PTR_ERR(dnotifyThread);
-               cERROR(1, ("error %d create dnotify thread", rc));
-               goto out_stop_oplock_thread;
-       }
+       rc = slow_work_register_user(THIS_MODULE);
+       if (rc)
+               goto out_unregister_resolver_key;
 
        return 0;
 
- out_stop_oplock_thread:
-       kthread_stop(oplockThread);
- out_unregister_dfs_key_type:
+ out_unregister_resolver_key:
 #ifdef CONFIG_CIFS_DFS_UPCALL
        unregister_key_type(&key_type_dns_resolver);
  out_unregister_key_type:
@@ -1137,8 +1093,6 @@ exit_cifs(void)
        cifs_destroy_inodecache();
        cifs_destroy_mids();
        cifs_destroy_request_bufs();
-       kthread_stop(oplockThread);
-       kthread_stop(dnotifyThread);
 }
 
 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");