From: Paulo Alcantara (SUSE) <paulo@xxxxxxxx>
commit 29fbeb7a908a60a5ae8c50fbe171cb8fdcef1980 upstream.
Fix mount options comparison when serverino option is turned off later
in cifs_autodisable_serverino() and thus avoiding mismatch of new cifs
mounts.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Paulo Alcantara (SUSE) <paulo@xxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Reviewed-by: Pavel Shilovsky <pshilove@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/cifs_fs_sb.h | 5 +++++
fs/cifs/connect.c | 8 ++++++--
fs/cifs/misc.c | 1 +
3 files changed, 12 insertions(+), 2 deletions(-)
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -83,5 +83,10 @@ struct cifs_sb_info {
* failover properly.
*/
char *origin_fullpath; /* \\HOST\SHARE\[OPTIONAL PATH] */
+ /*
+ * Indicate whether serverino option was turned off later
+ * (cifs_autodisable_serverino) in order to match new mounts.
+ */
+ bool mnt_cifs_serverino_autodisabled;
};
#endif /* _CIFS_FS_SB_H */
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3460,12 +3460,16 @@ compare_mount_options(struct super_block
{
struct cifs_sb_info *old = CIFS_SB(sb);
struct cifs_sb_info *new = mnt_data->cifs_sb;
+ unsigned int oldflags = old->mnt_cifs_flags & CIFS_MOUNT_MASK;
+ unsigned int newflags = new->mnt_cifs_flags & CIFS_MOUNT_MASK;
if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
return 0;
- if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
- (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
+ if (old->mnt_cifs_serverino_autodisabled)
+ newflags &= ~CIFS_MOUNT_SERVER_INUM;
+
+ if (oldflags != newflags)
return 0;
/*
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -539,6 +539,7 @@ cifs_autodisable_serverino(struct cifs_s
tcon = cifs_sb_master_tcon(cifs_sb);
cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
+ cifs_sb->mnt_cifs_serverino_autodisabled = true;
cifs_dbg(VFS, "Autodisabling the use of server inode numbers on %s.\n",
tcon ? tcon->treeName : "new server");
cifs_dbg(VFS, "The server doesn't seem to support them properly or the files might be on different servers (DFS).\n");
