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btrfs-progs: mkfs: extend mkfs features with compat, safe and default versions 

Enhance the mkfs_features list with the minimum kernel versions that
will allow for turning on compatible and/or safe options.

Signed-off-by: David Sterba <dsterba@suse.com>
master
David Sterba 2016-02-09 19:36:42 +01:00
parent 279609aedf
commit 9ab0db84ec
1 changed files with 32 additions and 5 deletions
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37
utils.c
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@ -1450,20 +1450,43 @@ out:
return ret;
}
/*
* Feature stability status and versions: compat <= safe <= default
*/
static const struct btrfs_fs_feature {
const char *name;
u64 flag;
/*
* Compatibility with kernel of given version. Filesystem can be
* mounted.
*/
const char *compat_ver;
/*
* Considered safe for use, but is not on by default, even if the
* kernel supports the feature.
*/
const char *safe_ver;
/*
* Considered safe for use and will be turned on by default if
* supported by the running kernel.
*/
const char *default_ver;
const char *desc;
} mkfs_features[] = {
{ "mixed-bg", BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS,
"2.6.37", "2.6.37", NULL,
"mixed data and metadata block groups" },
{ "extref", BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF,
"3.7", "3.12", "3.12",
"increased hardlink limit per file to 65536" },
{ "raid56", BTRFS_FEATURE_INCOMPAT_RAID56,
"3.9", NULL, NULL,
"raid56 extended format" },
{ "skinny-metadata", BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA,
"3.10", "3.18", "3.18",
"reduced-size metadata extent refs" },
{ "no-holes", BTRFS_FEATURE_INCOMPAT_NO_HOLES,
"3.14", "4.0", NULL,
"no explicit hole extents for files" },
/* Keep this one last */
{ "list-all", BTRFS_FEATURE_LIST_ALL, NULL }
@ -1523,14 +1546,18 @@ void btrfs_list_all_fs_features(u64 mask_disallowed)
fprintf(stderr, "Filesystem features available:\n");
for (i = 0; i < ARRAY_SIZE(mkfs_features) - 1; i++) {
const struct btrfs_fs_feature *feat = &mkfs_features[i];
char *is_default = "";
if (feat->flag & mask_disallowed)
continue;
if (feat->flag & BTRFS_MKFS_DEFAULT_FEATURES)
is_default = ", default";
fprintf(stderr, "%-20s- %s (0x%llx%s)\n", feat->name,
feat->desc, feat->flag, is_default);
fprintf(stderr, "%-20s- %s (0x%llx", feat->name, feat->desc,
feat->flag);
if (feat->compat_ver)
fprintf(stderr, ", compat=%s", feat->compat_ver);
if (feat->safe_ver)
fprintf(stderr, ", safe=%s", feat->safe_ver);
if (feat->default_ver)
fprintf(stderr, ", default=%s", feat->default_ver);
fprintf(stderr, ")\n");
}
}