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| author | Marc Eshel <eshel@almaden.ibm.com> | 2006-11-28 16:26:47 -0500 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2007-05-06 20:38:50 -0400 |
| commit | 2b36f412ab6f2e5b64af9832b20eb7ef67d025b4 (patch) | |
| tree | b4a561cc944d25d96798f97d06bd78760db7afba /include | |
| parent | 2beb6614f5e36c6165b704c167d82ef3e4ceaa0c (diff) | |
| download | linux-2b36f412ab6f2e5b64af9832b20eb7ef67d025b4.tar.gz linux-2b36f412ab6f2e5b64af9832b20eb7ef67d025b4.tar.bz2 linux-2b36f412ab6f2e5b64af9832b20eb7ef67d025b4.zip | |
lockd: save lock state on deferral
We need to keep some state for a pending asynchronous lock request, so this
patch adds that state to struct nlm_block.
This also adds a function which defers the request, by calling
rqstp->rq_chandle.defer and storing the resulting deferred request in a
nlm_block structure which we insert into lockd's global block list. That
new function isn't called yet, so it's dead code until a later patch.
Signed-off-by: Marc Eshel <eshel@almaden.ibm.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/lockd/lockd.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h index ac25b5649c59..d4c4de753bca 100644 --- a/include/linux/lockd/lockd.h +++ b/include/linux/lockd/lockd.h @@ -119,6 +119,9 @@ struct nlm_file { * couldn't be granted because of a conflicting lock). */ #define NLM_NEVER (~(unsigned long) 0) +/* timeout on non-blocking call: */ +#define NLM_TIMEOUT (7 * HZ) + struct nlm_block { struct kref b_count; /* Reference count */ struct list_head b_list; /* linked list of all blocks */ @@ -130,6 +133,13 @@ struct nlm_block { unsigned int b_id; /* block id */ unsigned char b_granted; /* VFS granted lock */ struct nlm_file * b_file; /* file in question */ + struct cache_req * b_cache_req; /* deferred request handling */ + struct file_lock * b_fl; /* set for GETLK */ + struct cache_deferred_req * b_deferred_req; + unsigned int b_flags; /* block flags */ +#define B_QUEUED 1 /* lock queued */ +#define B_GOT_CALLBACK 2 /* got lock or conflicting lock */ +#define B_TIMED_OUT 4 /* filesystem too slow to respond */ }; /* |