xfs: move btree cursor into bmalloca

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>

diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 6a7832d..a54326b 100644 (file)
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -4608,7 +4608,6 @@ STATIC int
 xfs_bmapi_allocate(
        struct xfs_bmalloca     *bma,
        xfs_extnum_t            *lastx,
-       struct xfs_btree_cur    **cur,
        int                     flags,
        int                     *nallocs,
        int                     *logflags)
@@ -4668,14 +4667,14 @@ xfs_bmapi_allocate(
 
        if (bma->flist->xbf_low)
                bma->minleft = 0;
-       if (*cur)
-               (*cur)->bc_private.b.firstblock = *bma->firstblock;
+       if (bma->cur)
+               bma->cur->bc_private.b.firstblock = *bma->firstblock;
        if (bma->blkno == NULLFSBLOCK)
                return 0;
-       if ((ifp->if_flags & XFS_IFBROOT) && !*cur) {
-               (*cur) = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork);
-               (*cur)->bc_private.b.firstblock = *bma->firstblock;
-               (*cur)->bc_private.b.flist = bma->flist;
+       if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) {
+               bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork);
+               bma->cur->bc_private.b.firstblock = *bma->firstblock;
+               bma->cur->bc_private.b.flist = bma->flist;
        }
        /*
         * Bump the number of extents we've allocated
@@ -4683,8 +4682,8 @@ xfs_bmapi_allocate(
         */
        (*nallocs)++;
 
-       if (*cur)
-               (*cur)->bc_private.b.flags =
+       if (bma->cur)
+               bma->cur->bc_private.b.flags =
                        bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
 
        bma->got.br_startoff = bma->offset;
@@ -4702,12 +4701,12 @@ xfs_bmapi_allocate(
 
        if (bma->wasdel) {
                error = xfs_bmap_add_extent_delay_real(bma->tp, bma->ip, lastx,
-                               cur, &bma->got, bma->firstblock, bma->flist,
-                               logflags);
+                               &bma->cur, &bma->got, bma->firstblock,
+                               bma->flist, logflags);
        } else {
                error = xfs_bmap_add_extent_hole_real(bma->tp, bma->ip, lastx,
-                               cur, &bma->got, bma->firstblock, bma->flist,
-                               logflags, whichfork);
+                               &bma->cur, &bma->got, bma->firstblock,
+                               bma->flist, logflags, whichfork);
        }
 
        if (error)
@@ -4734,7 +4733,6 @@ xfs_bmapi_convert_unwritten(
        struct xfs_bmbt_irec    *mval,
        xfs_filblks_t           len,
        xfs_extnum_t            *lastx,
-       struct xfs_btree_cur    **cur,
        int                     flags,
        int                     *logflags)
 {
@@ -4760,17 +4758,17 @@ xfs_bmapi_convert_unwritten(
         * Modify (by adding) the state flag, if writing.
         */
        ASSERT(mval->br_blockcount <= len);
-       if ((ifp->if_flags & XFS_IFBROOT) && !*cur) {
-               *cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp,
+       if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) {
+               bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp,
                                        bma->ip, whichfork);
-               (*cur)->bc_private.b.firstblock = *bma->firstblock;
-               (*cur)->bc_private.b.flist = bma->flist;
+               bma->cur->bc_private.b.firstblock = *bma->firstblock;
+               bma->cur->bc_private.b.flist = bma->flist;
        }
        mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN)
                                ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
 
        error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, lastx,
-                       cur, mval, bma->firstblock, bma->flist, logflags);
+                       &bma->cur, mval, bma->firstblock, bma->flist, logflags);
        if (error)
                return error;
 
@@ -4819,7 +4817,6 @@ xfs_bmapi_write(
        struct xfs_mount        *mp = ip->i_mount;
        struct xfs_ifork        *ifp;
        struct xfs_bmalloca     bma = { 0 };    /* args for xfs_bmap_alloc */
-       struct xfs_btree_cur    *cur;           /* bmap btree cursor */
        xfs_fileoff_t           end;            /* end of mapped file region */
        int                     eof;            /* after the end of extents */
        int                     error;          /* error return */
@@ -4875,7 +4872,6 @@ xfs_bmapi_write(
 
        logflags = 0;
        nallocs = 0;
-       cur = NULL;
 
        if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
                error = xfs_bmap_local_to_extents(tp, ip, firstblock, total,
@@ -4927,7 +4923,7 @@ xfs_bmapi_write(
                        bma.length = len;
                        bma.offset = bno;
 
-                       error = xfs_bmapi_allocate(&bma, &lastx, &cur, flags,
+                       error = xfs_bmapi_allocate(&bma, &lastx, flags,
                                        &nallocs, &tmp_logflags);
                        logflags |= tmp_logflags;
                        if (error)
@@ -4942,7 +4938,7 @@ xfs_bmapi_write(
 
                /* Execute unwritten extent conversion if necessary */
                error = xfs_bmapi_convert_unwritten(&bma, mval, len, &lastx,
-                                                   &cur, flags, &tmp_logflags);
+                                                   flags, &tmp_logflags);
                logflags |= tmp_logflags;
                if (error == EAGAIN)
                        continue;
@@ -4974,8 +4970,8 @@ xfs_bmapi_write(
         */
        if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
            XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) {
-               ASSERT(cur);
-               error = xfs_bmap_btree_to_extents(tp, ip, cur,
+               ASSERT(bma.cur);
+               error = xfs_bmap_btree_to_extents(tp, ip, bma.cur,
                        &tmp_logflags, whichfork);
                logflags |= tmp_logflags;
                if (error)
@@ -5005,19 +5001,19 @@ error0:
        if (logflags)
                xfs_trans_log_inode(tp, ip, logflags);
 
-       if (cur) {
+       if (bma.cur) {
                if (!error) {
                        ASSERT(*firstblock == NULLFSBLOCK ||
                               XFS_FSB_TO_AGNO(mp, *firstblock) ==
                               XFS_FSB_TO_AGNO(mp,
-                                      cur->bc_private.b.firstblock) ||
+                                      bma.cur->bc_private.b.firstblock) ||
                               (flist->xbf_low &&
                                XFS_FSB_TO_AGNO(mp, *firstblock) <
                                XFS_FSB_TO_AGNO(mp,
-                                       cur->bc_private.b.firstblock)));
-                       *firstblock = cur->bc_private.b.firstblock;
+                                       bma.cur->bc_private.b.firstblock)));
+                       *firstblock = bma.cur->bc_private.b.firstblock;
                }
-               xfs_btree_del_cursor(cur,
+               xfs_btree_del_cursor(bma.cur,
                        error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
        }
        if (!error)

diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h
index 5f398b1..858d9d5 100644 (file)
--- a/fs/xfs/xfs_bmap.h
+++ b/fs/xfs/xfs_bmap.h
@@ -120,6 +120,8 @@ typedef struct xfs_bmalloca {
        xfs_extlen_t            length; /* i/o length asked/allocated */
        xfs_fsblock_t           blkno;  /* starting block of new extent */
 
+       struct xfs_btree_cur    *cur;   /* btree cursor */
+
        xfs_extlen_t            total;  /* total blocks needed for xaction */
        xfs_extlen_t            minlen; /* minimum allocation size (blocks) */
        xfs_extlen_t            minleft; /* amount must be left after alloc */