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author | Ian Kent <raven@themaw.net> | 2009-12-15 16:45:51 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-16 07:19:58 -0800 |
commit | 213614d583748d00967a91cacd656f417efb36ce (patch) | |
tree | f24b85cb8192af7f6723f3886fba3da55ccfbe0d /fs/autofs4/autofs_i.h | |
parent | cb4b492ac7595aad10756fe0b04691f0965e0cfc (diff) | |
download | kernel_samsung_espresso10-213614d583748d00967a91cacd656f417efb36ce.zip kernel_samsung_espresso10-213614d583748d00967a91cacd656f417efb36ce.tar.gz kernel_samsung_espresso10-213614d583748d00967a91cacd656f417efb36ce.tar.bz2 |
autofs4: always use lookup for lookup
We need to be able to cope with the directory mutex being held during
->d_revalidate() in some cases, but not all cases, and not necessarily by
us. Because we need to release the mutex when we call back to the daemon
to do perform a mount we must be sure that it is us who holds the mutex so
we must redirect mount requests to ->lookup() if the mutex is held.
Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Sage Weil <sage@newdream.net>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Andreas Dilger <adilger@sun.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Yehuda Saheh <yehuda@newdream.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.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index 3d283ab..0118d67 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -60,6 +60,11 @@ do { \ current->pid, __func__, ##args); \ } while (0) +struct rehash_entry { + struct task_struct *task; + struct list_head list; +}; + /* Unified info structure. This is pointed to by both the dentry and inode structures. Each file in the filesystem has an instance of this structure. It holds a reference to the dentry, so dentries are never @@ -76,6 +81,7 @@ struct autofs_info { struct list_head active; int active_count; + struct list_head rehash_list; struct list_head expiring; @@ -98,6 +104,7 @@ struct autofs_info { #define AUTOFS_INF_EXPIRING (1<<0) /* dentry is in the process of expiring */ #define AUTOFS_INF_MOUNTPOINT (1<<1) /* mountpoint status for direct expire */ #define AUTOFS_INF_PENDING (1<<2) /* dentry pending mount */ +#define AUTOFS_INF_REHASH (1<<3) /* dentry in transit to ->lookup() */ struct autofs_wait_queue { wait_queue_head_t queue; |