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authorMarc Eshel <eshel@almaden.ibm.com>2006-11-28 16:26:47 -0500
committerJ. Bruce Fields <bfields@citi.umich.edu>2007-05-06 20:38:50 -0400
commit2b36f412ab6f2e5b64af9832b20eb7ef67d025b4 (patch)
treeb4a561cc944d25d96798f97d06bd78760db7afba /include/linux/lockd
parent2beb6614f5e36c6165b704c167d82ef3e4ceaa0c (diff)
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/linux/lockd')
-rw-r--r--include/linux/lockd/lockd.h10
1 files changed, 10 insertions, 0 deletions
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 */
};
/*