diff options
| -rw-r--r-- | fs/bcachefs/fs.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c index bfbd4f004edc..73a3cebd734f 100644 --- a/fs/bcachefs/fs.c +++ b/fs/bcachefs/fs.c @@ -1716,6 +1716,35 @@ static void bch2_put_super(struct super_block *sb) __bch2_fs_stop(c); } +/* + * bcachefs doesn't currently integrate intwrite freeze protection but the + * internal write references serve the same purpose. Therefore reuse the + * read-only transition code to perform the quiesce. The caveat is that we don't + * currently have the ability to block tasks that want a write reference while + * the superblock is frozen. This is fine for now, but we should either add + * blocking support or find a way to integrate sb_start_intwrite() and friends. + */ +static int bch2_freeze(struct super_block *sb) +{ + struct bch_fs *c = sb->s_fs_info; + + down_write(&c->state_lock); + bch2_fs_read_only(c); + up_write(&c->state_lock); + return 0; +} + +static int bch2_unfreeze(struct super_block *sb) +{ + struct bch_fs *c = sb->s_fs_info; + int ret; + + down_write(&c->state_lock); + ret = bch2_fs_read_write(c); + up_write(&c->state_lock); + return ret; +} + static const struct super_operations bch_super_operations = { .alloc_inode = bch2_alloc_inode, .destroy_inode = bch2_destroy_inode, @@ -1727,10 +1756,8 @@ static const struct super_operations bch_super_operations = { .show_options = bch2_show_options, .remount_fs = bch2_remount, .put_super = bch2_put_super, -#if 0 .freeze_fs = bch2_freeze, .unfreeze_fs = bch2_unfreeze, -#endif }; static int bch2_set_super(struct super_block *s, void *data) |