mirror of https://gitee.com/openkylin/linux.git
[XFS] kill xfs_syncsub
Now that the only caller is xfs_sync(), merge the two together as it makes no sense to keep them separate. SGI-PV: 988140 SGI-Modid: xfs-linux-melb:xfs-kern:32306a Signed-off-by: David Chinner <david@fromorbit.com> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org>
This commit is contained in:
David Chinner
Lachlan McIlroy
parent
2030b5aba8
commit
dfd837a9eb
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@ -47,79 +47,6 @@
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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/*
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* xfs_sync flushes any pending I/O to file system vfsp.
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*
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* This routine is called by vfs_sync() to make sure that things make it
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* out to disk eventually, on sync() system calls to flush out everything,
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* and when the file system is unmounted. For the vfs_sync() case, all
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* we really need to do is sync out the log to make all of our meta-data
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* updates permanent (except for timestamps). For calls from pflushd(),
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* dirty pages are kept moving by calling pdflush() on the inodes
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* containing them. We also flush the inodes that we can lock without
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* sleeping and the superblock if we can lock it without sleeping from
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* vfs_sync() so that items at the tail of the log are always moving out.
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*
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* Flags:
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* SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
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* to sleep if we can help it. All we really need
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* to do is ensure that the log is synced at least
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* periodically. We also push the inodes and
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* superblock if we can lock them without sleeping
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* and they are not pinned.
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* SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
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* set, then we really want to lock each inode and flush
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* it.
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* SYNC_WAIT - All the flushes that take place in this call should
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* be synchronous.
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* SYNC_DELWRI - This tells us to push dirty pages associated with
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* inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
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* determine if they should be flushed sync, async, or
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* delwri.
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* SYNC_CLOSE - This flag is passed when the system is being
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* unmounted. We should sync and invalidate everything.
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* SYNC_FSDATA - This indicates that the caller would like to make
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* sure the superblock is safe on disk. We can ensure
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* this by simply making sure the log gets flushed
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* if SYNC_BDFLUSH is set, and by actually writing it
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* out otherwise.
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* SYNC_IOWAIT - The caller wants us to wait for all data I/O to complete
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* before we return (including direct I/O). Forms the drain
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* side of the write barrier needed to safely quiesce the
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* filesystem.
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*
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*/
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int
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xfs_sync(
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xfs_mount_t *mp,
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int flags)
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{
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int error;
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/*
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* Get the Quota Manager to flush the dquots.
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*
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* If XFS quota support is not enabled or this filesystem
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* instance does not use quotas XFS_QM_DQSYNC will always
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* return zero.
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*/
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error = XFS_QM_DQSYNC(mp, flags);
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if (error) {
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/*
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* If we got an IO error, we will be shutting down.
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* So, there's nothing more for us to do here.
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*/
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ASSERT(error != EIO || XFS_FORCED_SHUTDOWN(mp));
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if (XFS_FORCED_SHUTDOWN(mp))
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return XFS_ERROR(error);
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}
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if (flags & SYNC_IOWAIT)
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xfs_filestream_flush(mp);
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return xfs_syncsub(mp, flags);
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}
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/*
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* Sync all the inodes in the given AG according to the
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* direction given by the flags.
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@ -396,21 +323,77 @@ xfs_sync_fsdata(
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}
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/*
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* xfs sync routine for internal use
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* xfs_sync flushes any pending I/O to file system vfsp.
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*
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* This routine supports all of the flags defined for the generic vfs_sync
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* interface as explained above under xfs_sync.
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* This routine is called by vfs_sync() to make sure that things make it
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* out to disk eventually, on sync() system calls to flush out everything,
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* and when the file system is unmounted. For the vfs_sync() case, all
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* we really need to do is sync out the log to make all of our meta-data
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* updates permanent (except for timestamps). For calls from pflushd(),
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* dirty pages are kept moving by calling pdflush() on the inodes
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* containing them. We also flush the inodes that we can lock without
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* sleeping and the superblock if we can lock it without sleeping from
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* vfs_sync() so that items at the tail of the log are always moving out.
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*
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* Flags:
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* SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
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* to sleep if we can help it. All we really need
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* to do is ensure that the log is synced at least
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* periodically. We also push the inodes and
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* superblock if we can lock them without sleeping
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* and they are not pinned.
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* SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
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* set, then we really want to lock each inode and flush
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* it.
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* SYNC_WAIT - All the flushes that take place in this call should
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* be synchronous.
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* SYNC_DELWRI - This tells us to push dirty pages associated with
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* inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
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* determine if they should be flushed sync, async, or
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* delwri.
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* SYNC_CLOSE - This flag is passed when the system is being
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* unmounted. We should sync and invalidate everything.
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* SYNC_FSDATA - This indicates that the caller would like to make
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* sure the superblock is safe on disk. We can ensure
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* this by simply making sure the log gets flushed
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* if SYNC_BDFLUSH is set, and by actually writing it
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* out otherwise.
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* SYNC_IOWAIT - The caller wants us to wait for all data I/O to complete
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* before we return (including direct I/O). Forms the drain
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* side of the write barrier needed to safely quiesce the
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* filesystem.
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*
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*/
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STATIC int
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xfs_syncsub(
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int
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xfs_sync(
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xfs_mount_t *mp,
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int flags)
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{
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int error = 0;
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int error;
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int last_error = 0;
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uint log_flags = XFS_LOG_FORCE;
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/*
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* Get the Quota Manager to flush the dquots.
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*
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* If XFS quota support is not enabled or this filesystem
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* instance does not use quotas XFS_QM_DQSYNC will always
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* return zero.
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*/
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error = XFS_QM_DQSYNC(mp, flags);
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if (error) {
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/*
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* If we got an IO error, we will be shutting down.
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* So, there's nothing more for us to do here.
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*/
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ASSERT(error != EIO || XFS_FORCED_SHUTDOWN(mp));
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if (XFS_FORCED_SHUTDOWN(mp))
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return XFS_ERROR(error);
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}
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if (flags & SYNC_IOWAIT)
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xfs_filestream_flush(mp);
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/*
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* Sync out the log. This ensures that the log is periodically
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* flushed even if there is not enough activity to fill it up.
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