Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 119 insertions, 231 deletions

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index f9ed0751cc12..fa8c21d913bc 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -50,42 +50,48 @@ build_path_from_dentry(struct dentry *direntry)
 {
         struct dentry *temp;
         int namelen;
-        int pplen;
         int dfsplen;
         char *full_path;
         char dirsep;
-        struct cifs_sb_info *cifs_sb;
+        struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+        struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+        unsigned seq;
 
         if (direntry == NULL)
                 return NULL;  /* not much we can do if dentry is freed and
                 we need to reopen the file after it was closed implicitly
                 when the server crashed */
 
-        cifs_sb = CIFS_SB(direntry->d_sb);
         dirsep = CIFS_DIR_SEP(cifs_sb);
-        pplen = cifs_sb->prepathlen;
-        if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS))
-                dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1);
+        if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
+                dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
         else
                 dfsplen = 0;
 cifs_bp_rename_retry:
-        namelen = pplen + dfsplen;
+        namelen = dfsplen;
+        seq = read_seqbegin(&rename_lock);
+        rcu_read_lock();
         for (temp = direntry; !IS_ROOT(temp);) {
                 namelen += (1 + temp->d_name.len);
                 temp = temp->d_parent;
                 if (temp == NULL) {
                         cERROR(1, "corrupt dentry");
+                        rcu_read_unlock();
                         return NULL;
                 }
         }
+        rcu_read_unlock();
 
         full_path = kmalloc(namelen+1, GFP_KERNEL);
         if (full_path == NULL)
                 return full_path;
         full_path[namelen] = 0; /* trailing null */
+        rcu_read_lock();
         for (temp = direntry; !IS_ROOT(temp);) {
+                spin_lock(&temp->d_lock);
                 namelen -= 1 + temp->d_name.len;
                 if (namelen < 0) {
+                        spin_unlock(&temp->d_lock);
                         break;
                 } else {
                         full_path[namelen] = dirsep;
@@ -93,14 +99,17 @@ cifs_bp_rename_retry:
                                 temp->d_name.len);
                         cFYI(0, "name: %s", full_path + namelen);
                 }
+                spin_unlock(&temp->d_lock);
                 temp = temp->d_parent;
                 if (temp == NULL) {
                         cERROR(1, "corrupt dentry");
+                        rcu_read_unlock();
                         kfree(full_path);
                         return NULL;
                 }
         }
-        if (namelen != pplen + dfsplen) {
+        rcu_read_unlock();
+        if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) {
                 cERROR(1, "did not end path lookup where expected namelen is %d",
                         namelen);
                 /* presumably this is only possible if racing with a rename
@@ -117,7 +126,7 @@ cifs_bp_rename_retry:
         /* BB test paths to Windows with '/' in the midst of prepath */
 
         if (dfsplen) {
-                strncpy(full_path, cifs_sb->tcon->treeName, dfsplen);
+                strncpy(full_path, tcon->treeName, dfsplen);
                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
                         int i;
                         for (i = 0; i < dfsplen; i++) {
@@ -126,150 +135,9 @@ cifs_bp_rename_retry:
                         }
                 }
         }
-        strncpy(full_path + dfsplen, CIFS_SB(direntry->d_sb)->prepath, pplen);
         return full_path;
 }
 
-struct cifsFileInfo *
-cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle,
-                  struct file *file, struct vfsmount *mnt, unsigned int oflags)
-{
-        int oplock = 0;
-        struct cifsFileInfo *pCifsFile;
-        struct cifsInodeInfo *pCifsInode;
-        struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb);
-
-        pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
-        if (pCifsFile == NULL)
-                return pCifsFile;
-
-        if (oplockEnabled)
-                oplock = REQ_OPLOCK;
-
-        pCifsFile->netfid = fileHandle;
-        pCifsFile->pid = current->tgid;
-        pCifsFile->pInode = igrab(newinode);
-        pCifsFile->mnt = mnt;
-        pCifsFile->pfile = file;
-        pCifsFile->invalidHandle = false;
-        pCifsFile->closePend = false;
-        mutex_init(&pCifsFile->fh_mutex);
-        mutex_init(&pCifsFile->lock_mutex);
-        INIT_LIST_HEAD(&pCifsFile->llist);
-        atomic_set(&pCifsFile->count, 1);
-        INIT_WORK(&pCifsFile->oplock_break, cifs_oplock_break);
-
-        write_lock(&GlobalSMBSeslock);
-        list_add(&pCifsFile->tlist, &cifs_sb->tcon->openFileList);
-        pCifsInode = CIFS_I(newinode);
-        if (pCifsInode) {
-                /* if readable file instance put first in list*/
-                if (oflags & FMODE_READ)
-                        list_add(&pCifsFile->flist, &pCifsInode->openFileList);
-                else
-                        list_add_tail(&pCifsFile->flist,
-                                      &pCifsInode->openFileList);
-
-                if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
-                        pCifsInode->clientCanCacheAll = true;
-                        pCifsInode->clientCanCacheRead = true;
-                        cFYI(1, "Exclusive Oplock inode %p", newinode);
-                } else if ((oplock & 0xF) == OPLOCK_READ)
-                                pCifsInode->clientCanCacheRead = true;
-        }
-        write_unlock(&GlobalSMBSeslock);
-
-        file->private_data = pCifsFile;
-
-        return pCifsFile;
-}
-
-int cifs_posix_open(char *full_path, struct inode **pinode,
-                        struct super_block *sb, int mode, int oflags,
-                        __u32 *poplock, __u16 *pnetfid, int xid)
-{
-        int rc;
-        FILE_UNIX_BASIC_INFO *presp_data;
-        __u32 posix_flags = 0;
-        struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
-        struct cifs_fattr fattr;
-
-        cFYI(1, "posix open %s", full_path);
-
-        presp_data = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
-        if (presp_data == NULL)
-                return -ENOMEM;
-
-/* So far cifs posix extensions can only map the following flags.
-   There are other valid fmode oflags such as FMODE_LSEEK, FMODE_PREAD, but
-   so far we do not seem to need them, and we can treat them as local only */
-        if ((oflags & (FMODE_READ | FMODE_WRITE)) ==
-                (FMODE_READ | FMODE_WRITE))
-                posix_flags = SMB_O_RDWR;
-        else if (oflags & FMODE_READ)
-                posix_flags = SMB_O_RDONLY;
-        else if (oflags & FMODE_WRITE)
-                posix_flags = SMB_O_WRONLY;
-        if (oflags & O_CREAT)
-                posix_flags |= SMB_O_CREAT;
-        if (oflags & O_EXCL)
-                posix_flags |= SMB_O_EXCL;
-        if (oflags & O_TRUNC)
-                posix_flags |= SMB_O_TRUNC;
-        /* be safe and imply O_SYNC for O_DSYNC */
-        if (oflags & O_DSYNC)
-                posix_flags |= SMB_O_SYNC;
-        if (oflags & O_DIRECTORY)
-                posix_flags |= SMB_O_DIRECTORY;
-        if (oflags & O_NOFOLLOW)
-                posix_flags |= SMB_O_NOFOLLOW;
-        if (oflags & O_DIRECT)
-                posix_flags |= SMB_O_DIRECT;
-
-        mode &= ~current_umask();
-        rc = CIFSPOSIXCreate(xid, cifs_sb->tcon, posix_flags, mode,
-                        pnetfid, presp_data, poplock, full_path,
-                        cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
-                                        CIFS_MOUNT_MAP_SPECIAL_CHR);
-        if (rc)
-                goto posix_open_ret;
-
-        if (presp_data->Type == cpu_to_le32(-1))
-                goto posix_open_ret; /* open ok, caller does qpathinfo */
-
-        if (!pinode)
-                goto posix_open_ret; /* caller does not need info */
-
-        cifs_unix_basic_to_fattr(&fattr, presp_data, cifs_sb);
-
-        /* get new inode and set it up */
-        if (*pinode == NULL) {
-                cifs_fill_uniqueid(sb, &fattr);
-                *pinode = cifs_iget(sb, &fattr);
-                if (!*pinode) {
-                        rc = -ENOMEM;
-                        goto posix_open_ret;
-                }
-        } else {
-                cifs_fattr_to_inode(*pinode, &fattr);
-        }
-
-posix_open_ret:
-        kfree(presp_data);
-        return rc;
-}
-
-static void setup_cifs_dentry(struct cifsTconInfo *tcon,
-                              struct dentry *direntry,
-                              struct inode *newinode)
-{
-        if (tcon->nocase)
-                direntry->d_op = &cifs_ci_dentry_ops;
-        else
-                direntry->d_op = &cifs_dentry_ops;
-        d_instantiate(direntry, newinode);
-}
-
 /* Inode operations in similar order to how they appear in Linux file fs.h */
 
 int
@@ -291,7 +159,8 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
         int desiredAccess = GENERIC_READ | GENERIC_WRITE;
         __u16 fileHandle;
         struct cifs_sb_info *cifs_sb;
-        struct cifsTconInfo *tcon;
+        struct tcon_link *tlink;
+        struct cifs_tcon *tcon;
         char *full_path = NULL;
         FILE_ALL_INFO *buf = NULL;
         struct inode *newinode = NULL;
@@ -300,21 +169,26 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
         xid = GetXid();
 
         cifs_sb = CIFS_SB(inode->i_sb);
-        tcon = cifs_sb->tcon;
-
-        full_path = build_path_from_dentry(direntry);
-        if (full_path == NULL) {
-                rc = -ENOMEM;
-                goto cifs_create_out;
+        tlink = cifs_sb_tlink(cifs_sb);
+        if (IS_ERR(tlink)) {
+                FreeXid(xid);
+                return PTR_ERR(tlink);
         }
+        tcon = tlink_tcon(tlink);
 
         if (oplockEnabled)
                 oplock = REQ_OPLOCK;
 
         if (nd && (nd->flags & LOOKUP_OPEN))
-                oflags = nd->intent.open.flags;
+                oflags = nd->intent.open.file->f_flags;
         else
-                oflags = FMODE_READ | SMB_O_CREAT;
+                oflags = O_RDONLY | O_CREAT;
+
+        full_path = build_path_from_dentry(direntry);
+        if (full_path == NULL) {
+                rc = -ENOMEM;
+                goto cifs_create_out;
+        }
 
         if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) &&
             (CIFS_UNIX_POSIX_PATH_OPS_CAP &
@@ -323,7 +197,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                         inode->i_sb, mode, oflags, &oplock, &fileHandle, xid);
                 /* EIO could indicate that (posix open) operation is not
                    supported, despite what server claimed in capability
-                   negotation.  EREMOTE indicates DFS junction, which is not
+                   negotiation.  EREMOTE indicates DFS junction, which is not
                    handled in posix open */
 
                 if (rc == 0) {
@@ -344,9 +218,9 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                 /* if the file is going to stay open, then we
                    need to set the desired access properly */
                 desiredAccess = 0;
-                if (oflags & FMODE_READ)
+                if (OPEN_FMODE(oflags) & FMODE_READ)
                         desiredAccess |= GENERIC_READ; /* is this too little? */
-                if (oflags & FMODE_WRITE)
+                if (OPEN_FMODE(oflags) & FMODE_WRITE)
                         desiredAccess |= GENERIC_WRITE;
 
                 if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
@@ -375,7 +249,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
         if (!tcon->unix_ext && (mode & S_IWUGO) == 0)
                 create_options |= CREATE_OPTION_READONLY;
 
-        if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS)
+        if (tcon->ses->capabilities & CAP_NT_SMBS)
                 rc = CIFSSMBOpen(xid, tcon, full_path, disposition,
                          desiredAccess, create_options,
                          &fileHandle, &oplock, buf, cifs_sb->local_nls,
@@ -416,10 +290,8 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                         args.uid = NO_CHANGE_64;
                         args.gid = NO_CHANGE_64;
                 }
-                CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
-                                        cifs_sb->local_nls,
-                                        cifs_sb->mnt_cifs_flags &
-                                                CIFS_MOUNT_MAP_SPECIAL_CHR);
+                CIFSSMBUnixSetFileInfo(xid, tcon, &args, fileHandle,
+                                        current->tgid);
         } else {
                 /* BB implement mode setting via Windows security
                    descriptors e.g. */
@@ -452,7 +324,7 @@ cifs_create_get_file_info:
 
 cifs_create_set_dentry:
         if (rc == 0)
-                setup_cifs_dentry(tcon, direntry, newinode);
+                d_instantiate(direntry, newinode);
         else
                 cFYI(1, "Create worked, get_inode_info failed rc = %d", rc);
 
@@ -467,8 +339,7 @@ cifs_create_set_dentry:
                         goto cifs_create_out;
                 }
 
-                pfile_info = cifs_new_fileinfo(newinode, fileHandle, filp,
-                                               nd->path.mnt, oflags);
+                pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock);
                 if (pfile_info == NULL) {
                         fput(filp);
                         CIFSSMBClose(xid, tcon, fileHandle);
@@ -481,6 +352,7 @@ cifs_create_set_dentry:
 cifs_create_out:
         kfree(buf);
         kfree(full_path);
+        cifs_put_tlink(tlink);
         FreeXid(xid);
         return rc;
 }
@@ -491,7 +363,9 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
         int rc = -EPERM;
         int xid;
         struct cifs_sb_info *cifs_sb;
-        struct cifsTconInfo *pTcon;
+        struct tcon_link *tlink;
+        struct cifs_tcon *pTcon;
+        struct cifs_io_parms io_parms;
         char *full_path = NULL;
         struct inode *newinode = NULL;
         int oplock = 0;
@@ -503,10 +377,14 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
         if (!old_valid_dev(device_number))
                 return -EINVAL;
 
-        xid = GetXid();
-
         cifs_sb = CIFS_SB(inode->i_sb);
-        pTcon = cifs_sb->tcon;
+        tlink = cifs_sb_tlink(cifs_sb);
+        if (IS_ERR(tlink))
+                return PTR_ERR(tlink);
+
+        pTcon = tlink_tcon(tlink);
+
+        xid = GetXid();
 
         full_path = build_path_from_dentry(direntry);
         if (full_path == NULL) {
@@ -538,10 +416,6 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
 
                 rc = cifs_get_inode_info_unix(&newinode, full_path,
                                                 inode->i_sb, xid);
-                if (pTcon->nocase)
-                        direntry->d_op = &cifs_ci_dentry_ops;
-                else
-                        direntry->d_op = &cifs_dentry_ops;
 
                 if (rc == 0)
                         d_instantiate(direntry, newinode);
@@ -574,16 +448,19 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
          * timestamps in, but we can reuse it safely */
 
         pdev = (struct win_dev *)buf;
+        io_parms.netfid = fileHandle;
+        io_parms.pid = current->tgid;
+        io_parms.tcon = pTcon;
+        io_parms.offset = 0;
+        io_parms.length = sizeof(struct win_dev);
         if (S_ISCHR(mode)) {
                 memcpy(pdev->type, "IntxCHR", 8);
                 pdev->major =
                       cpu_to_le64(MAJOR(device_number));
                 pdev->minor =
                       cpu_to_le64(MINOR(device_number));
-                rc = CIFSSMBWrite(xid, pTcon,
-                        fileHandle,
-                        sizeof(struct win_dev),
-                        0, &bytes_written, (char *)pdev,
+                rc = CIFSSMBWrite(xid, &io_parms,
+                        &bytes_written, (char *)pdev,
                         NULL, 0);
         } else if (S_ISBLK(mode)) {
                 memcpy(pdev->type, "IntxBLK", 8);
@@ -591,10 +468,8 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
                       cpu_to_le64(MAJOR(device_number));
                 pdev->minor =
                       cpu_to_le64(MINOR(device_number));
-                rc = CIFSSMBWrite(xid, pTcon,
-                        fileHandle,
-                        sizeof(struct win_dev),
-                        0, &bytes_written, (char *)pdev,
+                rc = CIFSSMBWrite(xid, &io_parms,
+                        &bytes_written, (char *)pdev,
                         NULL, 0);
         } /* else if (S_ISFIFO) */
         CIFSSMBClose(xid, pTcon, fileHandle);
@@ -606,6 +481,7 @@ mknod_out:
         kfree(full_path);
         kfree(buf);
         FreeXid(xid);
+        cifs_put_tlink(tlink);
         return rc;
 }
 
@@ -619,7 +495,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
         __u16 fileHandle = 0;
         bool posix_open = false;
         struct cifs_sb_info *cifs_sb;
-        struct cifsTconInfo *pTcon;
+        struct tcon_link *tlink;
+        struct cifs_tcon *pTcon;
         struct cifsFileInfo *cfile;
         struct inode *newInode = NULL;
         char *full_path = NULL;
@@ -633,7 +510,12 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
         /* check whether path exists */
 
         cifs_sb = CIFS_SB(parent_dir_inode->i_sb);
-        pTcon = cifs_sb->tcon;
+        tlink = cifs_sb_tlink(cifs_sb);
+        if (IS_ERR(tlink)) {
+                FreeXid(xid);
+                return (struct dentry *)tlink;
+        }
+        pTcon = tlink_tcon(tlink);
 
         /*
          * Don't allow the separator character in a path component.
@@ -644,8 +526,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
                 for (i = 0; i < direntry->d_name.len; i++)
                         if (direntry->d_name.name[i] == '\\') {
                                 cFYI(1, "Invalid file name");
-                                FreeXid(xid);
-                                return ERR_PTR(-EINVAL);
+                                rc = -EINVAL;
+                                goto lookup_out;
                         }
         }
 
@@ -655,7 +537,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
          */
         if (nd && (nd->flags & LOOKUP_EXCL)) {
                 d_instantiate(direntry, NULL);
-                return NULL;
+                rc = 0;
+                goto lookup_out;
         }
 
         /* can not grab the rename sem here since it would
@@ -663,8 +546,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
         in which we already have the sb rename sem */
         full_path = build_path_from_dentry(direntry);
         if (full_path == NULL) {
-                FreeXid(xid);
-                return ERR_PTR(-ENOMEM);
+                rc = -ENOMEM;
+                goto lookup_out;
         }
 
         if (direntry->d_inode != NULL) {
@@ -687,11 +570,11 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
         if (pTcon->unix_ext) {
                 if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) &&
                      (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open &&
-                     (nd->intent.open.flags & O_CREAT)) {
+                     (nd->intent.open.file->f_flags & O_CREAT)) {
                         rc = cifs_posix_open(full_path, &newInode,
                                         parent_dir_inode->i_sb,
                                         nd->intent.open.create_mode,
-                                        nd->intent.open.flags, &oplock,
+                                        nd->intent.open.file->f_flags, &oplock,
                                         &fileHandle, xid);
                         /*
                          * The check below works around a bug in POSIX
@@ -713,10 +596,6 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
                                 parent_dir_inode->i_sb, xid, NULL);
 
         if ((rc == 0) && (newInode != NULL)) {
-                if (pTcon->nocase)
-                        direntry->d_op = &cifs_ci_dentry_ops;
-                else
-                        direntry->d_op = &cifs_dentry_ops;
                 d_add(direntry, newInode);
                 if (posix_open) {
                         filp = lookup_instantiate_filp(nd, direntry,
@@ -727,9 +606,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
                                 goto lookup_out;
                         }
 
-                        cfile = cifs_new_fileinfo(newInode, fileHandle, filp,
-                                                  nd->path.mnt,
-                                                  nd->intent.open.flags);
+                        cfile = cifs_new_fileinfo(fileHandle, filp, tlink,
+                                                  oplock);
                         if (cfile == NULL) {
                                 fput(filp);
                                 CIFSSMBClose(xid, pTcon, fileHandle);
@@ -744,10 +622,6 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
         } else if (rc == -ENOENT) {
                 rc = 0;
                 direntry->d_time = jiffies;
-                if (pTcon->nocase)
-                        direntry->d_op = &cifs_ci_dentry_ops;
-                else
-                        direntry->d_op = &cifs_dentry_ops;
                 d_add(direntry, NULL);
         /*      if it was once a directory (but how can we tell?) we could do
                 shrink_dcache_parent(direntry); */
@@ -759,6 +633,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
 
 lookup_out:
         kfree(full_path);
+        cifs_put_tlink(tlink);
         FreeXid(xid);
         return ERR_PTR(rc);
 }
@@ -766,22 +641,37 @@ lookup_out:
 static int
 cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
 {
-        int isValid = 1;
+        if (nd->flags & LOOKUP_RCU)
+                return -ECHILD;
 
         if (direntry->d_inode) {
                 if (cifs_revalidate_dentry(direntry))
                         return 0;
-        } else {
-                cFYI(1, "neg dentry 0x%p name = %s",
-                         direntry, direntry->d_name.name);
-                if (time_after(jiffies, direntry->d_time + HZ) ||
-                        !lookupCacheEnabled) {
-                        d_drop(direntry);
-                        isValid = 0;
-                }
+                else
+                        return 1;
         }
 
-        return isValid;
+        /*
+         * This may be nfsd (or something), anyway, we can't see the
+         * intent of this. So, since this can be for creation, drop it.
+         */
+        if (!nd)
+                return 0;
+
+        /*
+         * Drop the negative dentry, in order to make sure to use the
+         * case sensitive name which is specified by user if this is
+         * for creation.
+         */
+        if (!(nd->flags & (LOOKUP_CONTINUE | LOOKUP_PARENT))) {
+                if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+                        return 0;
+        }
+
+        if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled)
+                return 0;
+
+        return 1;
 }
 
 /* static int cifs_d_delete(struct dentry *direntry)
@@ -795,12 +685,14 @@ cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
 
 const struct dentry_operations cifs_dentry_ops = {
         .d_revalidate = cifs_d_revalidate,
+        .d_automount = cifs_dfs_d_automount,
 /* d_delete:       cifs_d_delete,      */ /* not needed except for debugging */
 };
 
-static int cifs_ci_hash(struct dentry *dentry, struct qstr *q)
+static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode,
+                struct qstr *q)
 {
-        struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
+        struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
         unsigned long hash;
         int i;
 
@@ -813,21 +705,16 @@ static int cifs_ci_hash(struct dentry *dentry, struct qstr *q)
         return 0;
 }
 
-static int cifs_ci_compare(struct dentry *dentry, struct qstr *a,
-                           struct qstr *b)
+static int cifs_ci_compare(const struct dentry *parent,
+                const struct inode *pinode,
+                const struct dentry *dentry, const struct inode *inode,
+                unsigned int len, const char *str, const struct qstr *name)
 {
-        struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
-
-        if ((a->len == b->len) &&
-            (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) {
-                /*
-                 * To preserve case, don't let an existing negative dentry's
-                 * case take precedence.  If a is not a negative dentry, this
-                 * should have no side effects
-                 */
-                memcpy((void *)a->name, b->name, a->len);
+        struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls;
+
+        if ((name->len == len) &&
+            (nls_strnicmp(codepage, name->name, str, len) == 0))
                 return 0;
-        }
         return 1;
 }
 
@@ -835,4 +722,5 @@ const struct dentry_operations cifs_ci_dentry_ops = {
         .d_revalidate = cifs_d_revalidate,
         .d_hash = cifs_ci_hash,
         .d_compare = cifs_ci_compare,
+        .d_automount = cifs_dfs_d_automount,
 };