From 8c4e4acd660a09e571a71583b5bbe1eee700c9ad Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 16 Feb 2010 03:44:51 -0500 Subject: quota: clean up Q_XQUOTASYNC Currently Q_XQUOTASYNC calls into the quota_sync method, but XFS does something entirely different in it than the rest of the filesystems. xfs_quota which calls Q_XQUOTASYNC expects an asynchronous data writeout to flush delayed allocations, while the "VFS" quota support wants to flush changes to the quota file. So make Q_XQUOTASYNC call into the writeback code directly and make the quota_sync method optional as XFS doesn't need in the sense expected by the rest of the quota code. GFS2 was using limited XFS-style quota and has a quota_sync method fitting neither the style used by vfs_quota_sync nor xfs_fs_quota_sync. I left it in for now as per discussion with Steve it expects to be called from the sync path this way. Signed-off-by: Christoph Hellwig Signed-off-by: Jan Kara --- fs/quota/quota.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'fs/quota/quota.c') diff --git a/fs/quota/quota.c b/fs/quota/quota.c index d0efe302b1c..3d31228082e 100644 --- a/fs/quota/quota.c +++ b/fs/quota/quota.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include @@ -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; } -- cgit v1.2.3-70-g09d2