diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-02-03 15:24:19 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-02-03 15:24:19 -0500 |
| commit | 174fc78e24a34bbd8a3943b847fe6cf74089373e (patch) | |
| tree | 833ef2b75f4114f03332c8c62666310f4e7545ac | |
| parent | bbcbdb895e053b92dbf3b6342081d6553cf1cfbc (diff) | |
fs: super_block->s_uuid_len
Some weird old filesytems have UUID-like things that we wish to expose
as UUIDs, but are smaller; add a length field so that the new
FS_IOC_(GET|SET)UUID ioctls can handle them in generic code.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
| -rw-r--r-- | fs/super.c | 1 | ||||
| -rw-r--r-- | include/linux/fs.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/fs/super.c b/fs/super.c index d35e85295489..ed688d2a58a7 100644 --- a/fs/super.c +++ b/fs/super.c @@ -375,6 +375,7 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags, s->s_time_gran = 1000000000; s->s_time_min = TIME64_MIN; s->s_time_max = TIME64_MAX; + s->s_uuid_len = sizeof(s->s_uuid); s->s_shrink = shrinker_alloc(SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE, "sb-%s", type->name); diff --git a/include/linux/fs.h b/include/linux/fs.h index ed5966a70495..ff41ea6c3a9c 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1257,6 +1257,7 @@ struct super_block { char s_id[32]; /* Informational name */ uuid_t s_uuid; /* UUID */ + u8 s_uuid_len; /* Default 16, possibly smaller for weird filesystems */ unsigned int s_max_links; |