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authorJeff Layton <jlayton@redhat.com>2009-11-06 14:18:29 -0500
committerSteve French <sfrench@us.ibm.com>2009-11-06 22:04:37 +0000
commitec06aedd44541129840ed52e6165afa3796a27bf (patch)
tree3099a49ef7aac9ea14a921559ba067b230e33948 /fs/cifs
parent7c9abfb884b8737f0afdc8a88bcea77526f0da87 (diff)
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cifs: clean up handling when server doesn't consistently support inode numbers
It's possible that a server will return a valid FileID when we query the FILE_INTERNAL_INFO for the root inode, but then zeroed out inode numbers when we do a FindFile with an infolevel of SMB_FIND_FILE_ID_FULL_DIR_INFO. In this situation turn off querying for server inode numbers, generate a warning for the user and just generate an inode number using iunique. Once we generate any inode number with iunique we can no longer use any server inode numbers or we risk collisions, so ensure that we don't do that in cifs_get_inode_info either. Cc: Stable <stable@kernel.org> Reported-by: Timothy Normand Miller <theosib@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifsproto.h1
-rw-r--r--fs/cifs/inode.c7
-rw-r--r--fs/cifs/misc.c14
-rw-r--r--fs/cifs/readdir.c7
4 files changed, 21 insertions, 8 deletions
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 6928c24..5646727 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -388,4 +388,5 @@ extern int CIFSSMBSetPosixACL(const int xid, struct cifsTconInfo *tcon,
const struct nls_table *nls_codepage, int remap_special_chars);
extern int CIFSGetExtAttr(const int xid, struct cifsTconInfo *tcon,
const int netfid, __u64 *pExtAttrBits, __u64 *pMask);
+extern void cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb);
#endif /* _CIFSPROTO_H */
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 5e24925..cababd8 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -512,13 +512,10 @@ int cifs_get_inode_info(struct inode **pinode,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
- if (rc1) {
+ if (rc1 || !fattr.cf_uniqueid) {
cFYI(1, ("GetSrvInodeNum rc %d", rc1));
fattr.cf_uniqueid = iunique(sb, ROOT_I);
- /* disable serverino if call not supported */
- if (rc1 == -EINVAL)
- cifs_sb->mnt_cifs_flags &=
- ~CIFS_MOUNT_SERVER_INUM;
+ cifs_autodisable_serverino(cifs_sb);
}
} else {
fattr.cf_uniqueid = iunique(sb, ROOT_I);
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 0241b25..1e25efc 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -715,3 +715,17 @@ cifsConvertToUCS(__le16 *target, const char *source, int maxlen,
ctoUCS_out:
return i;
}
+
+void
+cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb)
+{
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
+ cifs_sb->mnt_cifs_flags &= CIFS_MOUNT_SERVER_INUM;
+ cERROR(1, ("Autodisabling the use of server inode numbers on "
+ "%s. This server doesn't seem to support them "
+ "properly. Hardlinks will not be recognized on this "
+ "mount. Consider mounting with the \"noserverino\" "
+ "option to silence this message.",
+ cifs_sb->tcon->treeName));
+ }
+}
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 1f098ca..f84062f 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -727,11 +727,12 @@ static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir,
cifs_dir_info_to_fattr(&fattr, (FILE_DIRECTORY_INFO *)
pfindEntry, cifs_sb);
- /* FIXME: make _to_fattr functions fill this out */
- if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_ID_FULL_DIR_INFO)
+ if (inum && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
fattr.cf_uniqueid = inum;
- else
+ } else {
fattr.cf_uniqueid = iunique(sb, ROOT_I);
+ cifs_autodisable_serverino(cifs_sb);
+ }
ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
tmp_dentry = cifs_readdir_lookup(file->f_dentry, &qstring, &fattr);