diff options
Diffstat (limited to 'fs/quota/dquot.c')
| -rw-r--r-- | fs/quota/dquot.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 1bfac28b7e7d..047afb966420 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -2107,6 +2107,10 @@ int dquot_disable(struct super_block *sb, int type, unsigned int flags) struct quota_info *dqopt = sb_dqopt(sb); struct inode *toputinode[MAXQUOTAS]; + /* s_umount should be held in exclusive mode */ + if (WARN_ON_ONCE(down_read_trylock(&sb->s_umount))) + up_read(&sb->s_umount); + /* Cannot turn off usage accounting without turning off limits, or * suspend quotas and simultaneously turn quotas off. */ if ((flags & DQUOT_USAGE_ENABLED && !(flags & DQUOT_LIMITS_ENABLED)) @@ -2371,6 +2375,10 @@ int dquot_resume(struct super_block *sb, int type) int ret = 0, cnt; unsigned int flags; + /* s_umount should be held in exclusive mode */ + if (WARN_ON_ONCE(down_read_trylock(&sb->s_umount))) + up_read(&sb->s_umount); + for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (type != -1 && cnt != type) continue; @@ -2430,6 +2438,9 @@ int dquot_enable(struct inode *inode, int type, int format_id, /* Just unsuspend quotas? */ BUG_ON(flags & DQUOT_SUSPENDED); + /* s_umount should be held in exclusive mode */ + if (WARN_ON_ONCE(down_read_trylock(&sb->s_umount))) + up_read(&sb->s_umount); if (!flags) return 0; |