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bcachefs: Fix bch2_fs_get_tree() error path

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When a filesystem is mounted read-only, subsequent attempts to mount it
as read-write fail with EBUSY. Previously, the error path in
bch2_fs_get_tree() would unconditionally call __bch2_fs_stop(),
improperly freeing resources for a filesystem that was still actively
mounted. This change modifies the error path to only call
__bch2_fs_stop() if the superblock has no valid root dentry, ensuring
resources are not cleaned up prematurely when the filesystem is in use.

Signed-off-by: Florian Albrechtskirchinger <falbrechtskirchinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Florian Albrechtskirchinger 2025-03-27 14:31:08 +01:00 committed by Kent Overstreet
parent 6b1e0b9e18
commit 7c4cb50e1a
1 changed files with 2 additions and 1 deletions
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3
fs/bcachefs/fs.c
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@ -2290,7 +2290,8 @@ static int bch2_fs_get_tree(struct fs_context *fc)
goto err;
err_put_super:
__bch2_fs_stop(c);
if (!sb->s_root)
__bch2_fs_stop(c);
deactivate_locked_super(sb);
goto err;
}