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xfs: consolidate superblock logging functions

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We now have several superblock loggin functions that are identical
except for the transaction reservation and whether it shoul dbe a
synchronous transaction or not. Consolidate these all into a single
function, a single reserveration and a sync flag and call it
xfs_sync_sb().

Also, xfs_mod_sb() is not really a modification function - it's the
operation of logging the superblock buffer. hence change the name of
it to reflect this.

Note that we have to change the mp->m_update_flags that are passed
around at mount time to a boolean simply to indicate a superblock
update is needed.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Dave Chinner 2015-01-22 09:10:31 +11:00 • committed by Dave Chinner
parent 4d11a40239
commit 61e63ecb57
15 changed files with 101 additions and 181 deletions
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13
fs/xfs/xfs_super.c
View file

@ -1257,13 +1257,13 @@ xfs_fs_remount(
* If this is the first remount to writeable state we
* might have some superblock changes to update.
*/
if (mp->m_update_flags) {
error = xfs_mount_log_sb(mp);
if (mp->m_update_sb) {
error = xfs_sync_sb(mp, false);
if (error) {
xfs_warn(mp, "failed to write sb changes");
return error;
}
mp->m_update_flags = 0;
mp->m_update_sb = false;
}
/*
@ -1293,8 +1293,9 @@ xfs_fs_remount(
/*
* Second stage of a freeze. The data is already frozen so we only
* need to take care of the metadata. Once that's done write a dummy
* record to dirty the log in case of a crash while frozen.
* need to take care of the metadata. Once that's done sync the superblock
* to the log to dirty it in case of a crash while frozen. This ensures that we
* will recover the unlinked inode lists on the next mount.
*/
STATIC int
xfs_fs_freeze(
@ -1304,7 +1305,7 @@ xfs_fs_freeze(
xfs_save_resvblks(mp);
xfs_quiesce_attr(mp);
return xfs_fs_log_dummy(mp);
return xfs_sync_sb(mp, true);
}
STATIC int