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btrfs-progs: Add human readable incompat flags output for btrfs-show-super

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Add human readable incompat flags output for btrfs-show-super,
now no longer needs to calculate the hex flags by hand.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Qu Wenruo 2014-09-24 13:31:39 +08:00 committed by David Sterba
parent 685b206e30
commit afc850dd13
1 changed files with 53 additions and 0 deletions
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53
btrfs-show-super.c
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@ -285,6 +285,58 @@ static void print_backup_roots(struct btrfs_super_block *sb)
}
}
struct readable_flag_entry {
u64 bit;
char *output;
};
#define DEF_INCOMPAT_FLAG_ENTRY(bit_name) \
{BTRFS_FEATURE_INCOMPAT_##bit_name, #bit_name}
struct readable_flag_entry incompat_flags_array[] = {
DEF_INCOMPAT_FLAG_ENTRY(MIXED_BACKREF),
DEF_INCOMPAT_FLAG_ENTRY(DEFAULT_SUBVOL),
DEF_INCOMPAT_FLAG_ENTRY(MIXED_GROUPS),
DEF_INCOMPAT_FLAG_ENTRY(COMPRESS_LZO),
DEF_INCOMPAT_FLAG_ENTRY(COMPRESS_LZOv2),
DEF_INCOMPAT_FLAG_ENTRY(BIG_METADATA),
DEF_INCOMPAT_FLAG_ENTRY(EXTENDED_IREF),
DEF_INCOMPAT_FLAG_ENTRY(RAID56),
DEF_INCOMPAT_FLAG_ENTRY(SKINNY_METADATA),
DEF_INCOMPAT_FLAG_ENTRY(NO_HOLES)
};
static const int incompat_flags_num = sizeof(incompat_flags_array) /
sizeof(struct readable_flag_entry);
static void print_readable_incompat_flag(u64 flag)
{
int i;
int first = 1;
struct readable_flag_entry *entry;
if (!flag)
return;
printf("\t\t\t( ");
for (i = 0; i < incompat_flags_num; i++) {
entry = incompat_flags_array + i;
if (flag & entry->bit) {
if (first)
printf("%s ", entry->output);
else
printf("|\n\t\t\t %s ", entry->output);
}
first = 0;
}
flag &= ~BTRFS_FEATURE_INCOMPAT_SUPP;
if (flag) {
if (first)
printf("unknown flag: 0x%llx ", flag);
else
printf("|\n\t\t\t unknown flag: 0x%llx ", flag);
}
printf(")\n");
}
static void dump_superblock(struct btrfs_super_block *sb, int full)
{
int i;
@ -364,6 +416,7 @@ static void dump_superblock(struct btrfs_super_block *sb, int full)
(unsigned long long)btrfs_super_compat_ro_flags(sb));
printf("incompat_flags\t\t0x%llx\n",
(unsigned long long)btrfs_super_incompat_flags(sb));
print_readable_incompat_flag(btrfs_super_incompat_flags(sb));
printf("csum_type\t\t%llu\n",
(unsigned long long)btrfs_super_csum_type(sb));
printf("csum_size\t\t%llu\n",