/*
* First stage of freeze - no writers will make progress now we are here,
* so we flush delwri and delalloc buffers here, then wait for all I/O to
* complete. Data is frozen at that point. Metadata is not frozen,
* transactions can still occur here so don't bother flushing the buftarg
* because it'll just get dirty again.
*/
int
xfs_quiesce_data(
struct xfs_mount *mp)
{
int error, error2 = 0;
/* push non-blocking */
xfs_sync_data(mp, 0);
xfs_qm_sync(mp, SYNC_TRYLOCK);
/* push and block till complete */
xfs_sync_data(mp, SYNC_WAIT);
xfs_qm_sync(mp, SYNC_WAIT);
/* write superblock and hoover up shutdown errors */
error = xfs_sync_fsdata(mp);
/* make sure all delwri buffers are written out */
xfs_flush_buftarg(mp->m_ddev_targp, 1);
/* mark the log as covered if needed */
if (xfs_log_need_covered(mp))
error2 = xfs_fs_log_dummy(mp);
/* flush data-only devices */
if (mp->m_rtdev_targp)
XFS_bflush(mp->m_rtdev_targp);
return error ? error : error2;
}
/*
* First stage of freeze - no writers will make progress now we are here,
* so we flush delwri and delalloc buffers here, then wait for all I/O to
* complete. Data is frozen at that point. Metadata is not frozen,
* transactions can still occur here so don't bother flushing the buftarg
* because it'll just get dirty again.
*/
int
xfs_quiesce_data(
struct xfs_mount *mp)
{
int error, error2 = 0;
xfs_qm_sync(mp, SYNC_TRYLOCK);
xfs_qm_sync(mp, SYNC_WAIT);
/* force out the newly dirtied log buffers */
xfs_log_force(mp, XFS_LOG_SYNC);
/* write superblock and hoover up shutdown errors */
error = xfs_sync_fsdata(mp);
/* make sure all delwri buffers are written out */
xfs_flush_buftarg(mp->m_ddev_targp, 1);
/* mark the log as covered if needed */
if (xfs_log_need_covered(mp))
error2 = xfs_fs_log_dummy(mp);
/* flush data-only devices */
if (mp->m_rtdev_targp)
XFS_bflush(mp->m_rtdev_targp);
return error ? error : error2;
}
/*
* First stage of freeze - no writers will make progress now we are here,
* so we flush delwri and delalloc buffers here, then wait for all I/O to
* complete. Data is frozen at that point. Metadata is not frozen,
* transactions can still occur here so don't bother flushing the buftarg
* because it'll just get dirty again.
*/
int
xfs_quiesce_data(
struct xfs_mount *mp)
{
int error, error2 = 0;
/* push non-blocking */
xfs_sync_data(mp, 0);
xfs_qm_sync(mp, SYNC_TRYLOCK);
/* push and block till complete */
xfs_sync_data(mp, SYNC_WAIT);
/*
* Log all pending size and timestamp updates. The vfs writeback
* code is supposed to do this, but due to its overagressive
* livelock detection it will skip inodes where appending writes
* were written out in the first non-blocking sync phase if their
* completion took long enough that it happened after taking the
* timestamp for the cut-off in the blocking phase.
*/
xfs_inode_ag_iterator(mp, xfs_log_dirty_inode, 0);
xfs_qm_sync(mp, SYNC_WAIT);
/* write superblock and hoover up shutdown errors */
error = xfs_sync_fsdata(mp);
/* make sure all delwri buffers are written out */
xfs_flush_buftarg(mp->m_ddev_targp, 1);
/* mark the log as covered if needed */
if (xfs_log_need_covered(mp))
error2 = xfs_fs_log_dummy(mp);
/* flush data-only devices */
if (mp->m_rtdev_targp)
XFS_bflush(mp->m_rtdev_targp);
return error ? error : error2;
}
/* PRIVATE, debugging */
int
xfs_qm_internalqcheck(
xfs_mount_t *mp)
{
xfs_ino_t lastino;
int done, count;
int i;
xfs_dqtest_t *d, *e;
xfs_dqhash_t *h1;
int error;
lastino = 0;
qmtest_hashmask = 32;
count = 5;
done = 0;
qmtest_nfails = 0;
if (! XFS_IS_QUOTA_ON(mp))
return XFS_ERROR(ESRCH);
xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
XFS_bflush(mp->m_ddev_targp);
xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
XFS_bflush(mp->m_ddev_targp);
mutex_lock(&qcheck_lock);
/* There should be absolutely no quota activity while this
is going on. */
qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
sizeof(xfs_dqhash_t), KM_SLEEP);
qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
sizeof(xfs_dqhash_t), KM_SLEEP);
do {
/*
* Iterate thru all the inodes in the file system,
* adjusting the corresponding dquot counters
*/
if ((error = xfs_bulkstat(mp, &lastino, &count,
xfs_qm_internalqcheck_adjust, NULL,
0, NULL, BULKSTAT_FG_IGET, &done))) {
break;
}
} while (! done);
if (error) {
cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
}
cmn_err(CE_DEBUG, "Checking results against system dquots");
for (i = 0; i < qmtest_hashmask; i++) {
h1 = &qmtest_udqtab[i];
for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
xfs_dqtest_cmp(d);
e = (xfs_dqtest_t *) d->HL_NEXT;
kmem_free(d, sizeof(xfs_dqtest_t));
d = e;
}
h1 = &qmtest_gdqtab[i];
for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
xfs_dqtest_cmp(d);
e = (xfs_dqtest_t *) d->HL_NEXT;
kmem_free(d, sizeof(xfs_dqtest_t));
d = e;
}
}
if (qmtest_nfails) {
cmn_err(CE_DEBUG, "******** quotacheck failed ********");
cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
} else {
cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
}
kmem_free(qmtest_udqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
kmem_free(qmtest_gdqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
mutex_unlock(&qcheck_lock);
return (qmtest_nfails);
}
STATIC int
xfs_unmount(
bhv_desc_t *bdp,
int flags,
cred_t *credp)
{
struct vfs *vfsp = bhvtovfs(bdp);
xfs_mount_t *mp = XFS_BHVTOM(bdp);
xfs_inode_t *rip;
vnode_t *rvp;
int unmount_event_wanted = 0;
int unmount_event_flags = 0;
int xfs_unmountfs_needed = 0;
int error;
rip = mp->m_rootip;
rvp = XFS_ITOV(rip);
if (vfsp->vfs_flag & VFS_DMI) {
error = XFS_SEND_PREUNMOUNT(mp, vfsp,
rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
NULL, NULL, 0, 0,
(mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
0:DM_FLAGS_UNWANTED);
if (error)
return XFS_ERROR(error);
unmount_event_wanted = 1;
unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
0 : DM_FLAGS_UNWANTED;
}
/*
* First blow any referenced inode from this file system
* out of the reference cache, and delete the timer.
*/
xfs_refcache_purge_mp(mp);
XFS_bflush(mp->m_ddev_targp);
error = xfs_unmount_flush(mp, 0);
if (error)
goto out;
ASSERT(vn_count(rvp) == 1);
/*
* Drop the reference count
*/
VN_RELE(rvp);
/*
* If we're forcing a shutdown, typically because of a media error,
* we want to make sure we invalidate dirty pages that belong to
* referenced vnodes as well.
*/
if (XFS_FORCED_SHUTDOWN(mp)) {
error = xfs_sync(&mp->m_bhv,
(SYNC_WAIT | SYNC_CLOSE), credp);
ASSERT(error != EFSCORRUPTED);
}
xfs_unmountfs_needed = 1;
out:
/* Send DMAPI event, if required.
* Then do xfs_unmountfs() if needed.
* Then return error (or zero).
*/
if (unmount_event_wanted) {
/* Note: mp structure must still exist for
* XFS_SEND_UNMOUNT() call.
*/
XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
DM_RIGHT_NULL, 0, error, unmount_event_flags);
}
if (xfs_unmountfs_needed) {
/*
* Call common unmount function to flush to disk
* and free the super block buffer & mount structures.
*/
xfs_unmountfs(mp, credp);
}
return XFS_ERROR(error);
}
