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| author | Christoph Hellwig <hch@infradead.org> | 2010-02-16 03:44:51 -0500 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2010-03-05 00:20:24 +0100 |
| commit | 8c4e4acd660a09e571a71583b5bbe1eee700c9ad (patch) | |
| tree | 05d1208e70d96dfa6857dbb84de7f3554a721992 /fs/quota/quota.c | |
| parent | c988afb5fa3fc450207c3dfc0ce535f4bfdae4d1 (diff) | |
| download | linux-8c4e4acd660a09e571a71583b5bbe1eee700c9ad.tar.bz2 | |
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 <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
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; } |