#include "xfs_buf_item.h"
#include "xfs_inode_item.h"
#include "xfs_rw.h"
+#include "xfs_quota.h"
#include <linux/kthread.h>
#include <linux/freezer.h>
{
xfs_perag_t *pag = &mp->m_perag[ag];
int nr_found;
- int first_index = 0;
+ uint32_t first_index = 0;
int error = 0;
int last_error = 0;
- int fflag = XFS_B_ASYNC;
- int lock_flags = XFS_ILOCK_SHARED;
-
- if (flags & SYNC_DELWRI)
- fflag = XFS_B_DELWRI;
- if (flags & SYNC_WAIT)
- fflag = 0; /* synchronous overrides all */
-
- if (flags & SYNC_DELWRI) {
- /*
- * We need the I/O lock if we're going to call any of
- * the flush/inval routines.
- */
- lock_flags |= XFS_IOLOCK_SHARED;
- }
do {
struct inode *inode;
- boolean_t inode_refed;
xfs_inode_t *ip = NULL;
+ int lock_flags = XFS_ILOCK_SHARED;
/*
* use a gang lookup to find the next inode in the tree
break;
}
- /* update the index for the next lookup */
- first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1);
-
/*
- * skip inodes in reclaim. Let xfs_syncsub do that for
- * us so we don't need to worry.
+ * Update the index for the next lookup. Catch overflows
+ * into the next AG range which can occur if we have inodes
+ * in the last block of the AG and we are currently
+ * pointing to the last inode.
*/
- if (xfs_iflags_test(ip, (XFS_IRECLAIM|XFS_IRECLAIMABLE))) {
- read_unlock(&pag->pag_ici_lock);
- continue;
- }
-
- /* bad inodes are dealt with elsewhere */
- inode = VFS_I(ip);
- if (is_bad_inode(inode)) {
+ first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1);
+ if (first_index < XFS_INO_TO_AGINO(mp, ip->i_ino)) {
read_unlock(&pag->pag_ici_lock);
- continue;
+ break;
}
/* nothing to sync during shutdown */
}
/*
- * If we can't get a reference on the VFS_I, the inode must be
- * in reclaim. If we can get the inode lock without blocking,
- * it is safe to flush the inode because we hold the tree lock
- * and xfs_iextract will block right now. Hence if we lock the
- * inode while holding the tree lock, xfs_ireclaim() is
- * guaranteed to block on the inode lock we now hold and hence
- * it is safe to reference the inode until we drop the inode
- * locks completely.
+ * If we can't get a reference on the inode, it must be
+ * in reclaim. Leave it for the reclaim code to flush.
*/
- inode_refed = B_FALSE;
- if (igrab(inode)) {
- read_unlock(&pag->pag_ici_lock);
- xfs_ilock(ip, lock_flags);
- inode_refed = B_TRUE;
- } else {
- if (!xfs_ilock_nowait(ip, lock_flags)) {
- /* leave it to reclaim */
- read_unlock(&pag->pag_ici_lock);
- continue;
- }
+ inode = VFS_I(ip);
+ if (!igrab(inode)) {
read_unlock(&pag->pag_ici_lock);
+ continue;
+ }
+ read_unlock(&pag->pag_ici_lock);
+
+ /* avoid new or bad inodes */
+ if (is_bad_inode(inode) ||
+ xfs_iflags_test(ip, XFS_INEW)) {
+ IRELE(ip);
+ continue;
}
/*
* If we have to flush data or wait for I/O completion
- * we need to drop the ilock that we currently hold.
- * If we need to drop the lock, insert a marker if we
- * have not already done so.
+ * we need to hold the iolock.
*/
- if ((flags & SYNC_DELWRI) && VN_DIRTY(inode)) {
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
- error = xfs_flush_pages(ip, 0, -1, fflag, FI_NONE);
- if (flags & SYNC_IOWAIT)
- vn_iowait(ip);
- xfs_ilock(ip, XFS_ILOCK_SHARED);
+ if (flags & SYNC_DELWRI) {
+ if (VN_DIRTY(inode)) {
+ if (flags & SYNC_TRYLOCK) {
+ if (xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED))
+ lock_flags |= XFS_IOLOCK_SHARED;
+ } else {
+ xfs_ilock(ip, XFS_IOLOCK_SHARED);
+ lock_flags |= XFS_IOLOCK_SHARED;
+ }
+ if (lock_flags & XFS_IOLOCK_SHARED) {
+ error = xfs_flush_pages(ip, 0, -1,
+ (flags & SYNC_WAIT) ? 0
+ : XFS_B_ASYNC,
+ FI_NONE);
+ }
+ }
+ if (VN_CACHED(inode) && (flags & SYNC_IOWAIT))
+ xfs_ioend_wait(ip);
}
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
if ((flags & SYNC_ATTR) && !xfs_inode_clean(ip)) {
if (flags & SYNC_WAIT) {
xfs_ifunlock(ip);
}
}
-
- if (lock_flags)
- xfs_iunlock(ip, lock_flags);
-
- if (inode_refed) {
- IRELE(ip);
- }
+ xfs_iput(ip, lock_flags);
if (error)
last_error = error;
/* push non-blocking */
xfs_sync_inodes(mp, SYNC_DELWRI|SYNC_BDFLUSH);
- XFS_QM_DQSYNC(mp, SYNC_BDFLUSH);
+ xfs_qm_sync(mp, SYNC_BDFLUSH);
xfs_filestream_flush(mp);
/* push and block */
xfs_sync_inodes(mp, SYNC_DELWRI|SYNC_WAIT|SYNC_IOWAIT);
- XFS_QM_DQSYNC(mp, SYNC_WAIT);
+ xfs_qm_sync(mp, SYNC_WAIT);
/* write superblock and hoover up shutdown errors */
error = xfs_sync_fsdata(mp, 0);
/* flush inodes and push all remaining buffers out to disk */
xfs_quiesce_fs(mp);
- ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0);
+ /*
+ * Just warn here till VFS can correctly support
+ * read-only remount without racing.
+ */
+ WARN_ON(atomic_read(&mp->m_active_trans) != 0);
/* Push the superblock and write an unmount record */
error = xfs_log_sbcount(mp, 1);
xfs_syncd_queue_work(
struct xfs_mount *mp,
void *data,
- void (*syncer)(struct xfs_mount *, void *))
+ void (*syncer)(struct xfs_mount *, void *),
+ struct completion *completion)
{
- struct bhv_vfs_sync_work *work;
+ struct xfs_sync_work *work;
- work = kmem_alloc(sizeof(struct bhv_vfs_sync_work), KM_SLEEP);
+ work = kmem_alloc(sizeof(struct xfs_sync_work), KM_SLEEP);
INIT_LIST_HEAD(&work->w_list);
work->w_syncer = syncer;
work->w_data = data;
work->w_mount = mp;
+ work->w_completion = completion;
spin_lock(&mp->m_sync_lock);
list_add_tail(&work->w_list, &mp->m_sync_list);
spin_unlock(&mp->m_sync_lock);
* heads, looking about for more room...
*/
STATIC void
-xfs_flush_inode_work(
+xfs_flush_inodes_work(
struct xfs_mount *mp,
void *arg)
{
struct inode *inode = arg;
- filemap_flush(inode->i_mapping);
+ xfs_sync_inodes(mp, SYNC_DELWRI | SYNC_TRYLOCK);
+ xfs_sync_inodes(mp, SYNC_DELWRI | SYNC_TRYLOCK | SYNC_IOWAIT);
iput(inode);
}
void
-xfs_flush_inode(
+xfs_flush_inodes(
xfs_inode_t *ip)
{
struct inode *inode = VFS_I(ip);
+ DECLARE_COMPLETION_ONSTACK(completion);
igrab(inode);
- xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inode_work);
- delay(msecs_to_jiffies(500));
-}
-
-/*
- * This is the "bigger hammer" version of xfs_flush_inode_work...
- * (IOW, "If at first you don't succeed, use a Bigger Hammer").
- */
-STATIC void
-xfs_flush_device_work(
- struct xfs_mount *mp,
- void *arg)
-{
- struct inode *inode = arg;
- sync_blockdev(mp->m_super->s_bdev);
- iput(inode);
-}
-
-void
-xfs_flush_device(
- xfs_inode_t *ip)
-{
- struct inode *inode = VFS_I(ip);
-
- igrab(inode);
- xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_device_work);
- delay(msecs_to_jiffies(500));
+ xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inodes_work, &completion);
+ wait_for_completion(&completion);
xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
}
xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
xfs_reclaim_inodes(mp, 0, XFS_IFLUSH_DELWRI_ELSE_ASYNC);
/* dgc: errors ignored here */
- error = XFS_QM_DQSYNC(mp, SYNC_BDFLUSH);
+ error = xfs_qm_sync(mp, SYNC_BDFLUSH);
error = xfs_sync_fsdata(mp, SYNC_BDFLUSH);
if (xfs_log_need_covered(mp))
error = xfs_commit_dummy_trans(mp, XFS_LOG_FORCE);
{
struct xfs_mount *mp = arg;
long timeleft;
- bhv_vfs_sync_work_t *work, *n;
+ xfs_sync_work_t *work, *n;
LIST_HEAD (tmp);
set_freezable();
list_del(&work->w_list);
if (work == &mp->m_sync_work)
continue;
+ if (work->w_completion)
+ complete(work->w_completion);
kmem_free(work);
}
}
{
mp->m_sync_work.w_syncer = xfs_sync_worker;
mp->m_sync_work.w_mount = mp;
+ mp->m_sync_work.w_completion = NULL;
mp->m_sync_task = kthread_run(xfssyncd, mp, "xfssyncd");
if (IS_ERR(mp->m_sync_task))
return -PTR_ERR(mp->m_sync_task);
return 0;
}
-int
-xfs_reclaim_inodes(
+/*
+ * We set the inode flag atomically with the radix tree tag.
+ * Once we get tag lookups on the radix tree, this inode flag
+ * can go away.
+ */
+void
+xfs_inode_set_reclaim_tag(
+ xfs_inode_t *ip)
+{
+ xfs_mount_t *mp = ip->i_mount;
+ xfs_perag_t *pag = xfs_get_perag(mp, ip->i_ino);
+
+ read_lock(&pag->pag_ici_lock);
+ spin_lock(&ip->i_flags_lock);
+ radix_tree_tag_set(&pag->pag_ici_root,
+ XFS_INO_TO_AGINO(mp, ip->i_ino), XFS_ICI_RECLAIM_TAG);
+ __xfs_iflags_set(ip, XFS_IRECLAIMABLE);
+ spin_unlock(&ip->i_flags_lock);
+ read_unlock(&pag->pag_ici_lock);
+ xfs_put_perag(mp, pag);
+}
+
+void
+__xfs_inode_clear_reclaim_tag(
xfs_mount_t *mp,
- int noblock,
+ xfs_perag_t *pag,
+ xfs_inode_t *ip)
+{
+ radix_tree_tag_clear(&pag->pag_ici_root,
+ XFS_INO_TO_AGINO(mp, ip->i_ino), XFS_ICI_RECLAIM_TAG);
+}
+
+void
+xfs_inode_clear_reclaim_tag(
+ xfs_inode_t *ip)
+{
+ xfs_mount_t *mp = ip->i_mount;
+ xfs_perag_t *pag = xfs_get_perag(mp, ip->i_ino);
+
+ read_lock(&pag->pag_ici_lock);
+ spin_lock(&ip->i_flags_lock);
+ __xfs_inode_clear_reclaim_tag(mp, pag, ip);
+ spin_unlock(&ip->i_flags_lock);
+ read_unlock(&pag->pag_ici_lock);
+ xfs_put_perag(mp, pag);
+}
+
+
+STATIC void
+xfs_reclaim_inodes_ag(
+ xfs_mount_t *mp,
+ int ag,
+ int noblock,
int mode)
{
- xfs_inode_t *ip, *n;
+ xfs_inode_t *ip = NULL;
+ xfs_perag_t *pag = &mp->m_perag[ag];
+ int nr_found;
+ uint32_t first_index;
+ int skipped;
restart:
- XFS_MOUNT_ILOCK(mp);
- list_for_each_entry_safe(ip, n, &mp->m_del_inodes, i_reclaim) {
+ first_index = 0;
+ skipped = 0;
+ do {
+ /*
+ * use a gang lookup to find the next inode in the tree
+ * as the tree is sparse and a gang lookup walks to find
+ * the number of objects requested.
+ */
+ read_lock(&pag->pag_ici_lock);
+ nr_found = radix_tree_gang_lookup_tag(&pag->pag_ici_root,
+ (void**)&ip, first_index, 1,
+ XFS_ICI_RECLAIM_TAG);
+
+ if (!nr_found) {
+ read_unlock(&pag->pag_ici_lock);
+ break;
+ }
+
+ /*
+ * Update the index for the next lookup. Catch overflows
+ * into the next AG range which can occur if we have inodes
+ * in the last block of the AG and we are currently
+ * pointing to the last inode.
+ */
+ first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1);
+ if (first_index < XFS_INO_TO_AGINO(mp, ip->i_ino)) {
+ read_unlock(&pag->pag_ici_lock);
+ break;
+ }
+
+ /* ignore if already under reclaim */
+ if (xfs_iflags_test(ip, XFS_IRECLAIM)) {
+ read_unlock(&pag->pag_ici_lock);
+ continue;
+ }
+
if (noblock) {
- if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0)
+ if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
+ read_unlock(&pag->pag_ici_lock);
continue;
+ }
if (xfs_ipincount(ip) ||
!xfs_iflock_nowait(ip)) {
xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ read_unlock(&pag->pag_ici_lock);
continue;
}
}
- XFS_MOUNT_IUNLOCK(mp);
+ read_unlock(&pag->pag_ici_lock);
+
+ /*
+ * hmmm - this is an inode already in reclaim. Do
+ * we even bother catching it here?
+ */
if (xfs_reclaim_inode(ip, noblock, mode))
- delay(1);
+ skipped++;
+ } while (nr_found);
+
+ if (skipped) {
+ delay(1);
goto restart;
}
- XFS_MOUNT_IUNLOCK(mp);
+ return;
+
+}
+
+int
+xfs_reclaim_inodes(
+ xfs_mount_t *mp,
+ int noblock,
+ int mode)
+{
+ int i;
+
+ for (i = 0; i < mp->m_sb.sb_agcount; i++) {
+ if (!mp->m_perag[i].pag_ici_init)
+ continue;
+ xfs_reclaim_inodes_ag(mp, i, noblock, mode);
+ }
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff