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| author | David Sterba <dsterba@suse.com> | 2019-02-12 16:51:18 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-02-25 14:13:38 +0100 |
| commit | c8352942745e260d68dfdfdfbecd276c2aac3277 (patch) | |
| tree | d733d79c6447923c9ddb1ec48f372aa164b19fdd /fs/btrfs/scrub.c | |
| parent | ff09c4ca5992b839b4e8b411f55aecd75735fc16 (diff) | |
| download | lwn-c8352942745e260d68dfdfdfbecd276c2aac3277.tar.gz lwn-c8352942745e260d68dfdfdfbecd276c2aac3277.zip | |
btrfs: scrub: add assertions for worker pointers
The scrub worker pointers are not NULL iff the scrub is running, so
reset them back once the last reference is dropped. Add assertions to
the initial phase of scrub to verify that.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/scrub.c')
| -rw-r--r-- | fs/btrfs/scrub.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index d20150d68a90..669bedfec4a9 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -3744,17 +3744,20 @@ static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info, lockdep_assert_held(&fs_info->scrub_lock); if (refcount_read(&fs_info->scrub_workers_refcnt) == 0) { + ASSERT(fs_info->scrub_workers == NULL); fs_info->scrub_workers = btrfs_alloc_workqueue(fs_info, "scrub", flags, is_dev_replace ? 1 : max_active, 4); if (!fs_info->scrub_workers) goto fail_scrub_workers; + ASSERT(fs_info->scrub_wr_completion_workers == NULL); fs_info->scrub_wr_completion_workers = btrfs_alloc_workqueue(fs_info, "scrubwrc", flags, max_active, 2); if (!fs_info->scrub_wr_completion_workers) goto fail_scrub_wr_completion_workers; + ASSERT(fs_info->scrub_parity_workers == NULL); fs_info->scrub_parity_workers = btrfs_alloc_workqueue(fs_info, "scrubparity", flags, max_active, 2); @@ -3934,6 +3937,10 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, scrub_workers = fs_info->scrub_workers; scrub_wr_comp = fs_info->scrub_wr_completion_workers; scrub_parity = fs_info->scrub_parity_workers; + + fs_info->scrub_workers = NULL; + fs_info->scrub_wr_completion_workers = NULL; + fs_info->scrub_parity_workers = NULL; } mutex_unlock(&fs_info->scrub_lock); |