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btrfs-progs: corrupt block: handle block mapping errors in debug_corrupt_block 

Signed-off-by: David Sterba <dsterba@suse.com>
master
David Sterba 2016-07-15 16:46:08 +02:00
parent e4a2d99dfe
commit e319aa1490
1 changed files with 10 additions and 2 deletions
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12
btrfs-corrupt-block.c
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@ -34,7 +34,7 @@
#define FIELD_BUF_LEN 80
static void debug_corrupt_block(struct extent_buffer *eb,
static int debug_corrupt_block(struct extent_buffer *eb,
struct btrfs_root *root, u64 bytenr, u32 blocksize, u64 copy)
{
int ret;
@ -49,7 +49,13 @@ static void debug_corrupt_block(struct extent_buffer *eb,
ret = btrfs_map_block(&root->fs_info->mapping_tree, READ,
eb->start, &length, &multi,
mirror_num, NULL);
BUG_ON(ret);
if (ret) {
error("cannot map block %llu length %llu mirror %d: %d",
(unsigned long long)eb->start,
(unsigned long long)length,
mirror_num, ret);
return ret;
}
device = multi->stripes[0].dev;
eb->fd = device->fd;
device->total_ios++;
@ -79,6 +85,8 @@ static void debug_corrupt_block(struct extent_buffer *eb,
if (mirror_num > num_copies)
break;
}
return 0;
}
static void print_usage(int ret)