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btrfs-progs: print-tree: Add leaf flags and backref revision output 

Btrfs header has a u64 member flags, whose lowest 56 bits are for header
flags like WRITTEN and RELOC.
And its highest 8 bits are for backref revision.

Manually checking btrfs_header_flags() will be a pain, so add such leaf
flags and backref revision output for print-tree.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
master
Qu Wenruo 2017-05-08 15:38:10 +08:00 committed by David Sterba
parent 1a96fa0e6b
commit f8c82394c4
1 changed files with 24 additions and 0 deletions
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24
print-tree.c
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@ -956,13 +956,35 @@ static void print_dev_stats(struct extent_buffer *eb,
}
}
/* Caller must ensure sizeof(*ret) >= 14 "WRITTEN|RELOC" */
static void header_flags_to_str(u64 flags, char *ret)
{
int empty = 1;
if (flags & BTRFS_HEADER_FLAG_WRITTEN) {
empty = 0;
strcpy(ret, "WRITTEN");
}
if (flags & BTRFS_HEADER_FLAG_RELOC) {
if (!empty)
strcat(ret, "|");
strcat(ret, "RELOC");
}
}
void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *eb)
{
struct btrfs_item *item;
struct btrfs_disk_key disk_key;
char flags_str[128];
u32 i;
u32 nr;
u64 flags;
u8 backref_rev;
flags = btrfs_header_flags(eb) & ~BTRFS_BACKREF_REV_MASK;
backref_rev = btrfs_header_flags(eb) >> BTRFS_BACKREF_REV_SHIFT;
header_flags_to_str(flags, flags_str);
nr = btrfs_header_nritems(eb);
printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
@ -970,6 +992,8 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *eb)
btrfs_leaf_free_space(root, eb),
(unsigned long long)btrfs_header_generation(eb),
(unsigned long long)btrfs_header_owner(eb));
printf("leaf %llu flags 0x%llx(%s) backref revision %d\n",
btrfs_header_bytenr(eb), flags, flags_str, backref_rev);
print_uuids(eb);
fflush(stdout);