Merge branch 'xfs-misc-fixes-for-3.19-1' into for-next

7 files changed, 52 insertions, 48 deletions

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 24b4ebea0d4d..d083889535a2 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -44,8 +44,6 @@
 
 static kmem_zone_t *xfs_buf_zone;
 
-static struct workqueue_struct *xfslogd_workqueue;
-
 #ifdef XFS_BUF_LOCK_TRACKING
 # define XB_SET_OWNER(bp)       ((bp)->b_last_holder = current->pid)
 # define XB_CLEAR_OWNER(bp)     ((bp)->b_last_holder = -1)
@@ -463,7 +461,7 @@ _xfs_buf_find(
          * have to check that the buffer falls within the filesystem bounds.
          */
         eofs = XFS_FSB_TO_BB(btp->bt_mount, btp->bt_mount->m_sb.sb_dblocks);
-        if (blkno >= eofs) {
+        if (blkno < 0 || blkno >= eofs) {
                 /*
                  * XXX (dgc): we should really be returning -EFSCORRUPTED here,
                  * but none of the higher level infrastructure supports
@@ -1053,7 +1051,7 @@ xfs_buf_ioend_async(
         struct xfs_buf  *bp)
 {
         INIT_WORK(&bp->b_iodone_work, xfs_buf_ioend_work);
-        queue_work(xfslogd_workqueue, &bp->b_iodone_work);
+        queue_work(bp->b_target->bt_mount->m_buf_workqueue, &bp->b_iodone_work);
 }
 
 void
@@ -1882,15 +1880,8 @@ xfs_buf_init(void)
         if (!xfs_buf_zone)
                 goto out;
 
-        xfslogd_workqueue = alloc_workqueue("xfslogd",
-                                WQ_MEM_RECLAIM | WQ_HIGHPRI | WQ_FREEZABLE, 1);
-        if (!xfslogd_workqueue)
-                goto out_free_buf_zone;
-
         return 0;
 
- out_free_buf_zone:
-        kmem_zone_destroy(xfs_buf_zone);
  out:
         return -ENOMEM;
 }
@@ -1898,6 +1889,5 @@ xfs_buf_init(void)
 void
 xfs_buf_terminate(void)
 {
-        destroy_workqueue(xfslogd_workqueue);
         kmem_zone_destroy(xfs_buf_zone);
 }
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 8ed049d1e332..2ffb80267e37 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1082,7 +1082,7 @@ xfs_create(
         struct xfs_dquot        *udqp = NULL;
         struct xfs_dquot        *gdqp = NULL;
         struct xfs_dquot        *pdqp = NULL;
-        struct xfs_trans_res    tres;
+        struct xfs_trans_res    *tres;
         uint                    resblks;
 
         trace_xfs_create(dp, name);
@@ -1105,13 +1105,11 @@ xfs_create(
         if (is_dir) {
                 rdev = 0;
                 resblks = XFS_MKDIR_SPACE_RES(mp, name->len);
-                tres.tr_logres = M_RES(mp)->tr_mkdir.tr_logres;
-                tres.tr_logcount = XFS_MKDIR_LOG_COUNT;
+                tres = &M_RES(mp)->tr_mkdir;
                 tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR);
         } else {
                 resblks = XFS_CREATE_SPACE_RES(mp, name->len);
-                tres.tr_logres = M_RES(mp)->tr_create.tr_logres;
-                tres.tr_logcount = XFS_CREATE_LOG_COUNT;
+                tres = &M_RES(mp)->tr_create;
                 tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE);
         }
 
@@ -1123,17 +1121,16 @@ xfs_create(
          * the case we'll drop the one we have and get a more
          * appropriate transaction later.
          */
-        tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
-        error = xfs_trans_reserve(tp, &tres, resblks, 0);
+        error = xfs_trans_reserve(tp, tres, resblks, 0);
         if (error == -ENOSPC) {
                 /* flush outstanding delalloc blocks and retry */
                 xfs_flush_inodes(mp);
-                error = xfs_trans_reserve(tp, &tres, resblks, 0);
+                error = xfs_trans_reserve(tp, tres, resblks, 0);
         }
         if (error == -ENOSPC) {
                 /* No space at all so try a "no-allocation" reservation */
                 resblks = 0;
-                error = xfs_trans_reserve(tp, &tres, 0, 0);
+                error = xfs_trans_reserve(tp, tres, 0, 0);
         }
         if (error) {
                 cancel_flags = 0;
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index fe88ef67f93a..e810e9df91b7 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1031,7 +1031,7 @@ xfs_log_need_covered(xfs_mount_t *mp)
         struct xlog     *log = mp->m_log;
         int             needed = 0;
 
-        if (!xfs_fs_writable(mp))
+        if (!xfs_fs_writable(mp, SB_FREEZE_WRITE))
                 return 0;
 
         if (!xlog_cil_empty(log))
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 51435dbce9c4..13d117089101 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -1074,11 +1074,23 @@ xfs_unmountfs(
         xfs_sysfs_del(&mp->m_kobj);
 }
 
-int
-xfs_fs_writable(xfs_mount_t *mp)
+/*
+ * Determine whether modifications can proceed. The caller specifies the minimum
+ * freeze level for which modifications should not be allowed. This allows
+ * certain operations to proceed while the freeze sequence is in progress, if
+ * necessary.
+ */
+bool
+xfs_fs_writable(
+        struct xfs_mount        *mp,
+        int                     level)
 {
-        return !(mp->m_super->s_writers.frozen || XFS_FORCED_SHUTDOWN(mp) ||
-                (mp->m_flags & XFS_MOUNT_RDONLY));
+        ASSERT(level > SB_UNFROZEN);
+        if ((mp->m_super->s_writers.frozen >= level) ||
+            XFS_FORCED_SHUTDOWN(mp) || (mp->m_flags & XFS_MOUNT_RDONLY))
+                return false;
+
+        return true;
 }
 
 /*
@@ -1086,9 +1098,9 @@ xfs_fs_writable(xfs_mount_t *mp)
  *
  * Sync the superblock counters to disk.
  *
- * Note this code can be called during the process of freezing, so
- * we may need to use the transaction allocator which does not
- * block when the transaction subsystem is in its frozen state.
+ * Note this code can be called during the process of freezing, so we use the
+ * transaction allocator that does not block when the transaction subsystem is
+ * in its frozen state.
  */
 int
 xfs_log_sbcount(xfs_mount_t *mp)
@@ -1096,7 +1108,8 @@ xfs_log_sbcount(xfs_mount_t *mp)
         xfs_trans_t     *tp;
         int             error;
 
-        if (!xfs_fs_writable(mp))
+        /* allow this to proceed during the freeze sequence... */
+        if (!xfs_fs_writable(mp, SB_FREEZE_COMPLETE))
                 return 0;
 
         xfs_icsb_sync_counters(mp, 0);
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index b0447c86e7e2..01fb28f5ae1c 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -168,6 +168,7 @@ typedef struct xfs_mount {
                                                 /* low free space thresholds */
         struct xfs_kobj         m_kobj;
 
+        struct workqueue_struct *m_buf_workqueue;
         struct workqueue_struct *m_data_workqueue;
         struct workqueue_struct *m_unwritten_workqueue;
         struct workqueue_struct *m_cil_workqueue;
@@ -384,7 +385,7 @@ extern int	xfs_mount_log_sb(xfs_mount_t *, __int64_t);
 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
 extern int      xfs_readsb(xfs_mount_t *, int);
 extern void     xfs_freesb(xfs_mount_t *);
-extern int      xfs_fs_writable(xfs_mount_t *);
+extern bool     xfs_fs_writable(struct xfs_mount *mp, int level);
 extern int      xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
 
 extern int      xfs_dev_is_read_only(struct xfs_mount *, char *);
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index 80f2d77d929a..d1e0ab7a5d12 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -784,19 +784,21 @@ xfs_qm_log_quotaoff(
 {
         xfs_trans_t            *tp;
         int                     error;
-        xfs_qoff_logitem_t     *qoffi=NULL;
-        uint                    oldsbqflag=0;
+        xfs_qoff_logitem_t     *qoffi;
+
+        *qoffstartp = NULL;
 
         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
         error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_quotaoff, 0, 0);
-        if (error)
-                goto error0;
+        if (error) {
+                xfs_trans_cancel(tp, 0);
+                goto out;
+        }
 
         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
         xfs_trans_log_quotaoff_item(tp, qoffi);
 
         spin_lock(&mp->m_sb_lock);
-        oldsbqflag = mp->m_sb.sb_qflags;
         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
         spin_unlock(&mp->m_sb_lock);
 
@@ -809,19 +811,11 @@ xfs_qm_log_quotaoff(
          */
         xfs_trans_set_sync(tp);
         error = xfs_trans_commit(tp, 0);
+        if (error)
+                goto out;
 
-error0:
-        if (error) {
-                xfs_trans_cancel(tp, 0);
-                /*
-                 * No one else is modifying sb_qflags, so this is OK.
-                 * We still hold the quotaofflock.
-                 */
-                spin_lock(&mp->m_sb_lock);
-                mp->m_sb.sb_qflags = oldsbqflag;
-                spin_unlock(&mp->m_sb_lock);
-        }
         *qoffstartp = qoffi;
+out:
         return error;
 }
 
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 9f622feda6a4..03e3cc242902 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -842,10 +842,16 @@ STATIC int
 xfs_init_mount_workqueues(
         struct xfs_mount        *mp)
 {
+        mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
+                        WQ_MEM_RECLAIM|WQ_HIGHPRI|WQ_FREEZABLE, 1,
+                        mp->m_fsname);
+        if (!mp->m_buf_workqueue)
+                goto out;
+
         mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
                         WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
         if (!mp->m_data_workqueue)
-                goto out;
+                goto out_destroy_buf;
 
         mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
                         WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
@@ -884,6 +890,8 @@ out_destroy_unwritten:
         destroy_workqueue(mp->m_unwritten_workqueue);
 out_destroy_data_iodone_queue:
         destroy_workqueue(mp->m_data_workqueue);
+out_destroy_buf:
+        destroy_workqueue(mp->m_buf_workqueue);
 out:
         return -ENOMEM;
 }
@@ -898,6 +906,7 @@ xfs_destroy_mount_workqueues(
         destroy_workqueue(mp->m_cil_workqueue);
         destroy_workqueue(mp->m_data_workqueue);
         destroy_workqueue(mp->m_unwritten_workqueue);
+        destroy_workqueue(mp->m_buf_workqueue);
 }
 
 /*