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btrfs: plumb fs_info into btrfs_work

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In order to provide an fsid for trace events, we'll need a btrfs_fs_info
pointer.  The most lightweight way to do that for btrfs_work structures
is to associate it with the __btrfs_workqueue structure.  Each queued
btrfs_work structure has a workqueue associated with it, so that's
a natural fit.  It's a privately defined structures, so we add accessors
to retrieve the fs_info pointer.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Jeff Mahoney 2016-06-09 16:22:11 -04:00 • committed by David Sterba
parent 9f8d49095b
commit cb001095ca
4 changed files with 63 additions and 31 deletions
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6
fs/btrfs/async-thread.h
View file

@ -21,6 +21,7 @@
#define __BTRFS_ASYNC_THREAD_
#include <linux/workqueue.h>
struct btrfs_fs_info;
struct btrfs_workqueue;
/* Internal use only */
struct __btrfs_workqueue;
@ -67,7 +68,8 @@ BTRFS_WORK_HELPER_PROTO(scrubnc_helper);
BTRFS_WORK_HELPER_PROTO(scrubparity_helper);
struct btrfs_workqueue *btrfs_alloc_workqueue(const char *name,
struct btrfs_workqueue *btrfs_alloc_workqueue(struct btrfs_fs_info *fs_info,
const char *name,
unsigned int flags,
int limit_active,
int thresh);
@ -80,4 +82,6 @@ void btrfs_queue_work(struct btrfs_workqueue *wq,
void btrfs_destroy_workqueue(struct btrfs_workqueue *wq);
void btrfs_workqueue_set_max(struct btrfs_workqueue *wq, int max);
void btrfs_set_work_high_priority(struct btrfs_work *work);
struct btrfs_fs_info *btrfs_work_owner(struct btrfs_work *work);
struct btrfs_fs_info *btrfs_workqueue_owner(struct __btrfs_workqueue *wq);
#endif