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locks: keep a count of locks on the flctx lists

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This makes things a bit more efficient in the cifs and ceph lock
pushing code.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Acked-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Jeff Layton 2015-01-16 15:05:57 -05:00 • committed by Jeff Layton
parent 7448cc37b1
commit 9bd0f45b70
4 changed files with 38 additions and 35 deletions
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11
fs/ceph/locks.c
View file

@ -242,12 +242,9 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl)
/*
* Fills in the passed counter variables, so you can prepare pagelist metadata
* before calling ceph_encode_locks.
*
* FIXME: add counters to struct file_lock_context so we don't need to do this?
*/
void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count)
{
struct file_lock *lock;
struct file_lock_context *ctx;
*fcntl_count = 0;
@ -255,12 +252,8 @@ void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count)
ctx = inode->i_flctx;
if (ctx) {
spin_lock(&ctx->flc_lock);
list_for_each_entry(lock, &ctx->flc_posix, fl_list)
++(*fcntl_count);
list_for_each_entry(lock, &ctx->flc_flock, fl_list)
++(*flock_count);
spin_unlock(&ctx->flc_lock);
*fcntl_count = ctx->flc_posix_cnt;
*flock_count = ctx->flc_flock_cnt;
}
dout("counted %d flock locks and %d fcntl locks",
*flock_count, *fcntl_count);