diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2025-04-02 15:12:49 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2025-05-21 20:14:15 -0400 |
| commit | c02e5b57283ad6fd8dec8d834bd340bf2627fcee (patch) | |
| tree | 8ade6f27a1447fcead8be2ad0da70b416e11b524 /fs/bcachefs/super-io.c | |
| parent | 58c36e6710d3b3cc050c35c42954cb03c3e01c59 (diff) | |
bcachefs: Single device mode
Single device filesystems are now identified by the block device name,
not the UUID - and single device filesystems with the same UUID can be
mounted simultaneously, without any special options.
This allocates a new bit in the superblock, BCH_SB_MULTI_DEVICE, which
indicates whether a filesystem has ever been multi device.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/super-io.c')
| -rw-r--r-- | fs/bcachefs/super-io.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/bcachefs/super-io.c b/fs/bcachefs/super-io.c index adfcd8a92b93..2435e114cad9 100644 --- a/fs/bcachefs/super-io.c +++ b/fs/bcachefs/super-io.c @@ -468,6 +468,9 @@ int bch2_sb_validate(struct bch_sb *sb, u64 read_offset, SET_BCH_SB_VERSION_INCOMPAT_ALLOWED(sb, BCH_SB_VERSION_INCOMPAT(sb)); } + if (sb->nr_devices > 1) + SET_BCH_SB_MULTI_DEVICE(sb, true); + if (!flags) { /* * Been seeing a bug where these are getting inexplicably @@ -612,6 +615,7 @@ static void bch2_sb_update(struct bch_fs *c) c->sb.features = le64_to_cpu(src->features[0]); c->sb.compat = le64_to_cpu(src->compat[0]); + c->sb.multi_device = BCH_SB_MULTI_DEVICE(src); memset(c->sb.errors_silent, 0, sizeof(c->sb.errors_silent)); |