From 2b36f412ab6f2e5b64af9832b20eb7ef67d025b4 Mon Sep 17 00:00:00 2001 From: Marc Eshel Date: Tue, 28 Nov 2006 16:26:47 -0500 Subject: 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 Signed-off-by: J. Bruce Fields --- include/linux/lockd/lockd.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include/linux/lockd') diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h index ac25b5649c5..d4c4de753bc 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 */ }; /* -- cgit v1.2.3 From 85f3f1b3f7a6197b51a2ab98d927517df730214c Mon Sep 17 00:00:00 2001 From: Marc Eshel Date: Tue, 28 Nov 2006 16:27:06 -0500 Subject: lockd: pass cookie in nlmsvc_testlock Change NLM internal interface to pass more information for test lock; we need this to make sure the cookie information is pushed down to the place where we do request deferral, which is handled for testlock by the following patch. Signed-off-by: Marc Eshel Signed-off-by: J. Bruce Fields --- include/linux/lockd/lockd.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux/lockd') diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h index d4c4de753bc..424c3de333d 100644 --- a/include/linux/lockd/lockd.h +++ b/include/linux/lockd/lockd.h @@ -195,8 +195,8 @@ typedef int (*nlm_host_match_fn_t)(struct nlm_host *cur, struct nlm_host *ref) __be32 nlmsvc_lock(struct svc_rqst *, struct nlm_file *, struct nlm_lock *, int, struct nlm_cookie *); __be32 nlmsvc_unlock(struct nlm_file *, struct nlm_lock *); -__be32 nlmsvc_testlock(struct nlm_file *, struct nlm_lock *, - struct nlm_lock *); +__be32 nlmsvc_testlock(struct svc_rqst *, struct nlm_file *, + struct nlm_lock *, struct nlm_lock *, struct nlm_cookie *); __be32 nlmsvc_cancel_blocked(struct nlm_file *, struct nlm_lock *); unsigned long nlmsvc_retry_blocked(void); void nlmsvc_traverse_blocks(struct nlm_host *, struct nlm_file *, -- cgit v1.2.3