diff options
Diffstat (limited to 'fs/quota/quota.c')
| -rw-r--r-- | fs/quota/quota.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/quota/quota.c b/fs/quota/quota.c index d0efe302b1c1..3d31228082ea 100644 --- a/fs/quota/quota.c +++ b/fs/quota/quota.c @@ -18,6 +18,7 @@ #include <linux/capability.h> #include <linux/quotaops.h> #include <linux/types.h> +#include <linux/writeback.h> #include <net/netlink.h> #include <net/genetlink.h> @@ -52,7 +53,7 @@ void sync_quota_sb(struct super_block *sb, int type) { int cnt; - if (!sb->s_qcop->quota_sync) + if (!sb->s_qcop || !sb->s_qcop->quota_sync) return; sb->s_qcop->quota_sync(sb, type); @@ -318,9 +319,11 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, case Q_XGETQUOTA: return quota_getxquota(sb, type, id, addr); case Q_XQUOTASYNC: - if (!sb->s_qcop->quota_sync) - return -ENOSYS; - return sb->s_qcop->quota_sync(sb, type); + /* caller already holds s_umount */ + if (sb->s_flags & MS_RDONLY) + return -EROFS; + writeback_inodes_sb(sb); + return 0; default: return -EINVAL; } |