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authorQu Wenruo <wqu@suse.com>2021-12-30 16:45:13 +0800
committerDavid Sterba <dsterba@suse.com>2022-01-07 14:18:27 +0100
commit856e47946c6da280816ed9b9c32083c102838ba0 (patch)
tree729ff993591569e721dce39d4647db885322eb30 /fs
parent2ae8ae3d3def4c3ba73a58cc2531c42f0916f14e (diff)
downloadlinux-856e47946c6da280816ed9b9c32083c102838ba0.tar.bz2
btrfs: selftests: dump extent io tree if extent-io-tree test failed
When code modifying extent-io-tree get modified and got that selftest failed, it can take some time to pin down the cause. To make it easier to expose the problem, dump the extent io tree if the selftest failed. This can save developers debug time, especially since the selftest we can not use the trace events, thus have to manually add debug trace points. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/tests/extent-io-tests.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/btrfs/tests/extent-io-tests.c b/fs/btrfs/tests/extent-io-tests.c
index c2e72e7a8ff0..a232b15b8021 100644
--- a/fs/btrfs/tests/extent-io-tests.c
+++ b/fs/btrfs/tests/extent-io-tests.c
@@ -56,6 +56,54 @@ static noinline int process_page_range(struct inode *inode, u64 start, u64 end,
return count;
}
+#define STATE_FLAG_STR_LEN 256
+
+#define PRINT_ONE_FLAG(state, dest, cur, name) \
+({ \
+ if (state->state & EXTENT_##name) \
+ cur += scnprintf(dest + cur, STATE_FLAG_STR_LEN - cur, \
+ "%s" #name, cur == 0 ? "" : "|"); \
+})
+
+static void extent_flag_to_str(const struct extent_state *state, char *dest)
+{
+ int cur = 0;
+
+ dest[0] = 0;
+ PRINT_ONE_FLAG(state, dest, cur, DIRTY);
+ PRINT_ONE_FLAG(state, dest, cur, UPTODATE);
+ PRINT_ONE_FLAG(state, dest, cur, LOCKED);
+ PRINT_ONE_FLAG(state, dest, cur, NEW);
+ PRINT_ONE_FLAG(state, dest, cur, DELALLOC);
+ PRINT_ONE_FLAG(state, dest, cur, DEFRAG);
+ PRINT_ONE_FLAG(state, dest, cur, BOUNDARY);
+ PRINT_ONE_FLAG(state, dest, cur, NODATASUM);
+ PRINT_ONE_FLAG(state, dest, cur, CLEAR_META_RESV);
+ PRINT_ONE_FLAG(state, dest, cur, NEED_WAIT);
+ PRINT_ONE_FLAG(state, dest, cur, DAMAGED);
+ PRINT_ONE_FLAG(state, dest, cur, NORESERVE);
+ PRINT_ONE_FLAG(state, dest, cur, QGROUP_RESERVED);
+ PRINT_ONE_FLAG(state, dest, cur, CLEAR_DATA_RESV);
+}
+
+static void dump_extent_io_tree(const struct extent_io_tree *tree)
+{
+ struct rb_node *node;
+ char flags_str[STATE_FLAG_STR_LEN];
+
+ node = rb_first(&tree->state);
+ test_msg("io tree content:");
+ while (node) {
+ struct extent_state *state;
+
+ state = rb_entry(node, struct extent_state, rb_node);
+ extent_flag_to_str(state, flags_str);
+ test_msg(" start=%llu len=%llu flags=%s", state->start,
+ state->end + 1 - state->start, flags_str);
+ node = rb_next(node);
+ }
+}
+
static int test_find_delalloc(u32 sectorsize)
{
struct inode *inode;
@@ -258,6 +306,8 @@ static int test_find_delalloc(u32 sectorsize)
}
ret = 0;
out_bits:
+ if (ret)
+ dump_extent_io_tree(tmp);
clear_extent_bits(tmp, 0, total_dirty - 1, (unsigned)-1);
out:
if (locked_page)
@@ -534,6 +584,8 @@ static int test_find_first_clear_extent_bit(void)
ret = 0;
out:
+ if (ret)
+ dump_extent_io_tree(&tree);
clear_extent_bits(&tree, 0, (u64)-1, CHUNK_TRIMMED | CHUNK_ALLOCATED);
return ret;