diff options
| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | 2014-09-24 13:31:39 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.cz> | 2014-10-01 16:34:22 +0200 |
| commit | afc850dd13e672db63f6ba1faab9d4da6182f5b8 (patch) | |
| tree | b5bd875d458f6c687abbf88d82b019045d4e71b7 | |
| parent | 685b206e30eb65926b25430369f593afa24e035f (diff) | |
btrfs-progs: Add human readable incompat flags output for btrfs-show-super
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>
| -rw-r--r-- | btrfs-show-super.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/btrfs-show-super.c b/btrfs-show-super.c index 38c5d262..456dbd86 100644 --- a/btrfs-show-super.c +++ b/btrfs-show-super.c @@ -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", |