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| author | Liu Bo <bo.li.liu@oracle.com> | 2017-03-10 11:09:48 -0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-04-18 14:07:24 +0200 |
| commit | 09ed2f165cb3449237dec842b3564044e12d22cb (patch) | |
| tree | 1f87b647dea22a3056e41c7ed126f188da30bdda /fs | |
| parent | dec95574f4e6545c701420b950278dc6f55d0368 (diff) | |
| download | linux-09ed2f165cb3449237dec842b3564044e12d22cb.tar.bz2 | |
Btrfs: add file item tracepoints
While debugging truncate problems, I found that these tracepoints could
help us quickly know what went wrong.
Two sets of tracepoints are created to track regular/prealloc file item
and inline file item respectively, I put inline as a separate one since
what inline file items cares about are way less than the regular one.
This adds four tracepoints:
- btrfs_get_extent_show_fi_regular
- btrfs_get_extent_show_fi_inline
- btrfs_truncate_show_fi_regular
- btrfs_truncate_show_fi_inline
Cc: David Sterba <dsterba@suse.cz>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ formatting adjustments ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/inode.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 568b28114f09..da71119b5b7c 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4401,9 +4401,17 @@ search_again: if (extent_type != BTRFS_FILE_EXTENT_INLINE) { item_end += btrfs_file_extent_num_bytes(leaf, fi); + + trace_btrfs_truncate_show_fi_regular( + BTRFS_I(inode), leaf, fi, + found_key.offset); } else if (extent_type == BTRFS_FILE_EXTENT_INLINE) { item_end += btrfs_file_extent_inline_len(leaf, path->slots[0], fi); + + trace_btrfs_truncate_show_fi_inline( + BTRFS_I(inode), leaf, fi, path->slots[0], + found_key.offset); } item_end--; } @@ -6828,11 +6836,18 @@ again: found_type == BTRFS_FILE_EXTENT_PREALLOC) { extent_end = extent_start + btrfs_file_extent_num_bytes(leaf, item); + + trace_btrfs_get_extent_show_fi_regular(inode, leaf, item, + extent_start); } else if (found_type == BTRFS_FILE_EXTENT_INLINE) { size_t size; size = btrfs_file_extent_inline_len(leaf, path->slots[0], item); extent_end = ALIGN(extent_start + size, fs_info->sectorsize); + + trace_btrfs_get_extent_show_fi_inline(inode, leaf, item, + path->slots[0], + extent_start); } next: if (start >= extent_end) { |