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btrfs: pretty print leaked root name

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I'm a actual human being so am incapable of converting u64 to s64 in my
head, so add a helper to get the pretty name of a root objectid and use
that helper to spit out the name for any special roots for leaked roots,
so I don't have to scratch my head and figure out which root I messed up
the refs for.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2020-09-03 14:29:51 -04:00 committed by David Sterba
parent 66a2823c54
commit 457f1864b5
3 changed files with 46 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

6
fs/btrfs/disk-io.c
View file

@ -1503,10 +1503,12 @@ void btrfs_check_leaked_roots(struct btrfs_fs_info *fs_info)
struct btrfs_root *root;
while (!list_empty(&fs_info->allocated_roots)) {
char buf[BTRFS_ROOT_NAME_BUF_LEN];
root = list_first_entry(&fs_info->allocated_roots,
struct btrfs_root, leak_list);
btrfs_err(fs_info, "leaked root %llu-%llu refcount %d",
root->root_key.objectid, root->root_key.offset,
btrfs_err(fs_info, "leaked root %s refcount %d",
btrfs_root_name(root->root_key.objectid, buf),
refcount_read(&root->refs));
while (refcount_read(&root->refs) > 1)
btrfs_put_root(root);

38
fs/btrfs/print-tree.c
View file

@ -7,6 +7,44 @@
#include "disk-io.h"
#include "print-tree.h"
struct root_name_map {
u64 id;
char name[16];
};
static const struct root_name_map root_map[] = {
{ BTRFS_ROOT_TREE_OBJECTID, "ROOT_TREE" },
{ BTRFS_EXTENT_TREE_OBJECTID, "EXTENT_TREE" },
{ BTRFS_CHUNK_TREE_OBJECTID, "CHUNK_TREE" },
{ BTRFS_DEV_TREE_OBJECTID, "DEV_TREE" },
{ BTRFS_FS_TREE_OBJECTID, "FS_TREE" },
{ BTRFS_CSUM_TREE_OBJECTID, "CSUM_TREE" },
{ BTRFS_TREE_LOG_OBJECTID, "TREE_LOG" },
{ BTRFS_QUOTA_TREE_OBJECTID, "QUOTA_TREE" },
{ BTRFS_UUID_TREE_OBJECTID, "UUID_TREE" },
{ BTRFS_FREE_SPACE_TREE_OBJECTID, "FREE_SPACE_TREE" },
{ BTRFS_DATA_RELOC_TREE_OBJECTID, "DATA_RELOC_TREE" },
};
const char *btrfs_root_name(u64 objectid, char *buf)
{
int i;
if (objectid == BTRFS_TREE_RELOC_OBJECTID) {
snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN,
"TREE_RELOC offset=%llu", objectid);
return buf;
}
for (i = 0; i < ARRAY_SIZE(root_map); i++) {
if (root_map[i].id == objectid)
return root_map[i].name;
}
snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, "%llu", objectid);
return buf;
}
static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
{
int num_stripes = btrfs_chunk_num_stripes(eb, chunk);

4
fs/btrfs/print-tree.h
View file

@ -6,7 +6,11 @@
#ifndef BTRFS_PRINT_TREE_H
#define BTRFS_PRINT_TREE_H
/* Buffer size to contain tree name and possibly additional data (offset) */
#define BTRFS_ROOT_NAME_BUF_LEN 48
void btrfs_print_leaf(struct extent_buffer *l);
void btrfs_print_tree(struct extent_buffer *c, bool follow);
const char *btrfs_root_name(u64 objectid, char *buf);
#endif