Merge remote-tracking branches 'asoc/topic/ad1836', 'asoc/topic/ad193x', 'asoc/topic...

[~andy/linux] / fs / xfs / xfs_bmap.c

diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 3ef11b22e7505c380feb6597113d5b150f7b1afb..3b2c14b6f0fb13efd7a3aa89abc05d0a8334a5ff 100644 (file)
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -1635,7 +1635,7 @@ xfs_bmap_last_extent(
  * blocks at the end of the file which do not start at the previous data block,
  * we will try to align the new blocks at stripe unit boundaries.
  *
- * Returns 0 in bma->aeof if the file (fork) is empty as any new write will be
+ * Returns 1 in bma->aeof if the file (fork) is empty as any new write will be
  * at, or past the EOF.
  */
 STATIC int
@@ -1650,9 +1650,14 @@ xfs_bmap_isaeof(
        bma->aeof = 0;
        error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec,
                                     &is_empty);
-       if (error || is_empty)
+       if (error)
                return error;
 
+       if (is_empty) {
+               bma->aeof = 1;
+               return 0;
+       }
+
        /*
         * Check if we are allocation or past the last extent, or at least into
         * the last delayed allocated extent.
@@ -3643,10 +3648,19 @@ xfs_bmap_btalloc(
        int             isaligned;
        int             tryagain;
        int             error;
+       int             stripe_align;
 
        ASSERT(ap->length);
 
        mp = ap->ip->i_mount;
+
+       /* stripe alignment for allocation is determined by mount parameters */
+       stripe_align = 0;
+       if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC))
+               stripe_align = mp->m_swidth;
+       else if (mp->m_dalign)
+               stripe_align = mp->m_dalign;
+
        align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0;
        if (unlikely(align)) {
                error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
@@ -3655,6 +3669,8 @@ xfs_bmap_btalloc(
                ASSERT(!error);
                ASSERT(ap->length);
        }
+
+
        nullfb = *ap->firstblock == NULLFSBLOCK;
        fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock);
        if (nullfb) {
@@ -3730,7 +3746,7 @@ xfs_bmap_btalloc(
         */
        if (!ap->flist->xbf_low && ap->aeof) {
                if (!ap->offset) {
-                       args.alignment = mp->m_dalign;
+                       args.alignment = stripe_align;
                        atype = args.type;
                        isaligned = 1;
                        /*
@@ -3755,13 +3771,13 @@ xfs_bmap_btalloc(
                         * of minlen+alignment+slop doesn't go up
                         * between the calls.
                         */
-                       if (blen > mp->m_dalign && blen <= args.maxlen)
-                               nextminlen = blen - mp->m_dalign;
+                       if (blen > stripe_align && blen <= args.maxlen)
+                               nextminlen = blen - stripe_align;
                        else
                                nextminlen = args.minlen;
-                       if (nextminlen + mp->m_dalign > args.minlen + 1)
+                       if (nextminlen + stripe_align > args.minlen + 1)
                                args.minalignslop =
-                                       nextminlen + mp->m_dalign -
+                                       nextminlen + stripe_align -
                                        args.minlen - 1;
                        else
                                args.minalignslop = 0;
@@ -3783,7 +3799,7 @@ xfs_bmap_btalloc(
                 */
                args.type = atype;
                args.fsbno = ap->blkno;
-               args.alignment = mp->m_dalign;
+               args.alignment = stripe_align;
                args.minlen = nextminlen;
                args.minalignslop = 0;
                isaligned = 1;