Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6

[safe/jmp/linux-2.6] / fs / cifs / inode.c

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index b35cb03..5b042fc 100644 (file)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -715,6 +715,16 @@ cifs_find_inode(struct inode *inode, void *opaque)
        if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
                return 0;
 
+       /*
+        * uh oh -- it's a directory. We can't use it since hardlinked dirs are
+        * verboten. Disable serverino and return it as if it were found, the
+        * caller can discard it, generate a uniqueid and retry the find
+        */
+       if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry)) {
+               fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
+               cifs_autodisable_serverino(CIFS_SB(inode->i_sb));
+       }
+
        return 1;
 }
 
@@ -734,15 +744,22 @@ cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
        unsigned long hash;
        struct inode *inode;
 
+retry_iget5_locked:
        cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid);
 
        /* hash down to 32-bits on 32-bit arch */
        hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
 
        inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
-
-       /* we have fattrs in hand, update the inode */
        if (inode) {
+               /* was there a problematic inode number collision? */
+               if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
+                       iput(inode);
+                       fattr->cf_uniqueid = iunique(sb, ROOT_I);
+                       fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
+                       goto retry_iget5_locked;
+               }
+
                cifs_fattr_to_inode(inode, fattr);
                if (sb->s_flags & MS_NOATIME)
                        inode->i_flags |= S_NOATIME | S_NOCMTIME;