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authorIan Kent <raven@themaw.net>2008-07-23 21:30:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 10:47:31 -0700
commit5f6f4f28b6ba543beef8bad91aa6f69c7ffeee51 (patch)
tree72f3aac56d49c7bea7940f8d8b6e8ca559e3ae1c /fs/autofs4/autofs_i.h
parent391b52f98cf2e9bff227dad8bf9ea206fec43fa4 (diff)
downloadlinux-linaro-5f6f4f28b6ba543beef8bad91aa6f69c7ffeee51.tar.gz
autofs4: don't make expiring dentry negative
Correct the error of making a positive dentry negative after it has been instantiated. The code that makes this error attempts to re-use the dentry from a concurrent expire and mount to resolve a race and the dentry used for the lookup must be negative for mounts to trigger in the required cases. The fact is that the dentry doesn't need to be re-used because all that is needed is to preserve the flag that indicates an expire is still incomplete at the time of the mount request. This change uses the the dentry to check the flag and wait for the expire to complete then discards it instead of attempting to re-use it. Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/autofs4/autofs_i.h')
-rw-r--r--fs/autofs4/autofs_i.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index c3d352d7fa9..69b1497b002 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -52,7 +52,7 @@ struct autofs_info {
int flags;
- struct list_head rehash;
+ struct list_head expiring;
struct autofs_sb_info *sbi;
unsigned long last_used;
@@ -112,8 +112,8 @@ struct autofs_sb_info {
struct mutex wq_mutex;
spinlock_t fs_lock;
struct autofs_wait_queue *queues; /* Wait queue pointer */
- spinlock_t rehash_lock;
- struct list_head rehash_list;
+ spinlock_t lookup_lock;
+ struct list_head expiring_list;
};
static inline struct autofs_sb_info *autofs4_sbi(struct super_block *sb)