Merge branch 'for-linus' of git://git.kernel.org/pub/scm/fs/xfs/xfs
[safe/jmp/linux-2.6] / fs / xfs / xfs_attr_leaf.c
index 23ef5d7..afdc891 100644 (file)
@@ -155,7 +155,8 @@ xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes)
                 * minimum offset only needs to be the space required for 
                 * the btree root.
                 */ 
-               if (!dp->i_d.di_forkoff && dp->i_df.if_bytes > mp->m_attroffset)
+               if (!dp->i_d.di_forkoff && dp->i_df.if_bytes >
+                   xfs_default_attroffset(dp))
                        dsize = XFS_BMDR_SPACE_CALC(MINDBTPTRS);
                break;
                
@@ -298,6 +299,26 @@ xfs_attr_shortform_add(xfs_da_args_t *args, int forkoff)
 }
 
 /*
+ * After the last attribute is removed revert to original inode format,
+ * making all literal area available to the data fork once more.
+ */
+STATIC void
+xfs_attr_fork_reset(
+       struct xfs_inode        *ip,
+       struct xfs_trans        *tp)
+{
+       xfs_idestroy_fork(ip, XFS_ATTR_FORK);
+       ip->i_d.di_forkoff = 0;
+       ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
+
+       ASSERT(ip->i_d.di_anextents == 0);
+       ASSERT(ip->i_afp == NULL);
+
+       ip->i_df.if_ext_max = XFS_IFORK_DSIZE(ip) / sizeof(xfs_bmbt_rec_t);
+       xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+}
+
+/*
  * Remove an attribute from the shortform attribute list structure.
  */
 int
@@ -344,22 +365,10 @@ xfs_attr_shortform_remove(xfs_da_args_t *args)
         */
        totsize -= size;
        if (totsize == sizeof(xfs_attr_sf_hdr_t) &&
-                               !(args->op_flags & XFS_DA_OP_ADDNAME) &&
-                               (mp->m_flags & XFS_MOUNT_ATTR2) &&
-                               (dp->i_d.di_format != XFS_DINODE_FMT_BTREE)) {
-               /*
-                * Last attribute now removed, revert to original
-                * inode format making all literal area available
-                * to the data fork once more.
-                */
-               xfs_idestroy_fork(dp, XFS_ATTR_FORK);
-               dp->i_d.di_forkoff = 0;
-               dp->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
-               ASSERT(dp->i_d.di_anextents == 0);
-               ASSERT(dp->i_afp == NULL);
-               dp->i_df.if_ext_max =
-                       XFS_IFORK_DSIZE(dp) / (uint)sizeof(xfs_bmbt_rec_t);
-               xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
+           (mp->m_flags & XFS_MOUNT_ATTR2) &&
+           (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) &&
+           !(args->op_flags & XFS_DA_OP_ADDNAME)) {
+               xfs_attr_fork_reset(dp, args->trans);
        } else {
                xfs_idata_realloc(dp, -size, XFS_ATTR_FORK);
                dp->i_d.di_forkoff = xfs_attr_shortform_bytesfit(dp, totsize);
@@ -736,7 +745,7 @@ xfs_attr_shortform_allfit(xfs_dabuf_t *bp, xfs_inode_t *dp)
                        continue;               /* don't copy partial entries */
                if (!(entry->flags & XFS_ATTR_LOCAL))
                        return(0);
-               name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, i);
+               name_loc = xfs_attr_leaf_name_local(leaf, i);
                if (name_loc->namelen >= XFS_ATTR_SF_ENTSIZE_MAX)
                        return(0);
                if (be16_to_cpu(name_loc->valuelen) >= XFS_ATTR_SF_ENTSIZE_MAX)
@@ -786,20 +795,7 @@ xfs_attr_leaf_to_shortform(xfs_dabuf_t *bp, xfs_da_args_t *args, int forkoff)
        if (forkoff == -1) {
                ASSERT(dp->i_mount->m_flags & XFS_MOUNT_ATTR2);
                ASSERT(dp->i_d.di_format != XFS_DINODE_FMT_BTREE);
-
-               /*
-                * Last attribute was removed, revert to original
-                * inode format making all literal area available
-                * to the data fork once more.
-                */
-               xfs_idestroy_fork(dp, XFS_ATTR_FORK);
-               dp->i_d.di_forkoff = 0;
-               dp->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
-               ASSERT(dp->i_d.di_anextents == 0);
-               ASSERT(dp->i_afp == NULL);
-               dp->i_df.if_ext_max =
-                       XFS_IFORK_DSIZE(dp) / (uint)sizeof(xfs_bmbt_rec_t);
-               xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
+               xfs_attr_fork_reset(dp, args->trans);
                goto out;
        }
 
@@ -823,7 +819,7 @@ xfs_attr_leaf_to_shortform(xfs_dabuf_t *bp, xfs_da_args_t *args, int forkoff)
                if (!entry->nameidx)
                        continue;
                ASSERT(entry->flags & XFS_ATTR_LOCAL);
-               name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, i);
+               name_loc = xfs_attr_leaf_name_local(leaf, i);
                nargs.name = (char *)name_loc->nameval;
                nargs.namelen = name_loc->namelen;
                nargs.value = (char *)&name_loc->nameval[nargs.namelen];
@@ -1141,14 +1137,14 @@ xfs_attr_leaf_add_work(xfs_dabuf_t *bp, xfs_da_args_t *args, int mapindex)
         * as part of this transaction (a split operation for example).
         */
        if (entry->flags & XFS_ATTR_LOCAL) {
-               name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, args->index);
+               name_loc = xfs_attr_leaf_name_local(leaf, args->index);
                name_loc->namelen = args->namelen;
                name_loc->valuelen = cpu_to_be16(args->valuelen);
                memcpy((char *)name_loc->nameval, args->name, args->namelen);
                memcpy((char *)&name_loc->nameval[args->namelen], args->value,
                                   be16_to_cpu(name_loc->valuelen));
        } else {
-               name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index);
+               name_rmt = xfs_attr_leaf_name_remote(leaf, args->index);
                name_rmt->namelen = args->namelen;
                memcpy((char *)name_rmt->name, args->name, args->namelen);
                entry->flags |= XFS_ATTR_INCOMPLETE;
@@ -1159,7 +1155,7 @@ xfs_attr_leaf_add_work(xfs_dabuf_t *bp, xfs_da_args_t *args, int mapindex)
                args->rmtblkcnt = XFS_B_TO_FSB(mp, args->valuelen);
        }
        xfs_da_log_buf(args->trans, bp,
-            XFS_DA_LOGRANGE(leaf, XFS_ATTR_LEAF_NAME(leaf, args->index),
+            XFS_DA_LOGRANGE(leaf, xfs_attr_leaf_name(leaf, args->index),
                                   xfs_attr_leaf_entsize(leaf, args->index)));
 
        /*
@@ -1749,10 +1745,10 @@ xfs_attr_leaf_remove(xfs_dabuf_t *bp, xfs_da_args_t *args)
        /*
         * Compress the remaining entries and zero out the removed stuff.
         */
-       memset(XFS_ATTR_LEAF_NAME(leaf, args->index), 0, entsize);
+       memset(xfs_attr_leaf_name(leaf, args->index), 0, entsize);
        be16_add_cpu(&hdr->usedbytes, -entsize);
        xfs_da_log_buf(args->trans, bp,
-            XFS_DA_LOGRANGE(leaf, XFS_ATTR_LEAF_NAME(leaf, args->index),
+            XFS_DA_LOGRANGE(leaf, xfs_attr_leaf_name(leaf, args->index),
                                   entsize));
 
        tmp = (be16_to_cpu(hdr->count) - args->index)
@@ -1985,7 +1981,7 @@ xfs_attr_leaf_lookup_int(xfs_dabuf_t *bp, xfs_da_args_t *args)
                        continue;
                }
                if (entry->flags & XFS_ATTR_LOCAL) {
-                       name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, probe);
+                       name_loc = xfs_attr_leaf_name_local(leaf, probe);
                        if (name_loc->namelen != args->namelen)
                                continue;
                        if (memcmp(args->name, (char *)name_loc->nameval, args->namelen) != 0)
@@ -1995,7 +1991,7 @@ xfs_attr_leaf_lookup_int(xfs_dabuf_t *bp, xfs_da_args_t *args)
                        args->index = probe;
                        return(XFS_ERROR(EEXIST));
                } else {
-                       name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, probe);
+                       name_rmt = xfs_attr_leaf_name_remote(leaf, probe);
                        if (name_rmt->namelen != args->namelen)
                                continue;
                        if (memcmp(args->name, (char *)name_rmt->name,
@@ -2035,7 +2031,7 @@ xfs_attr_leaf_getvalue(xfs_dabuf_t *bp, xfs_da_args_t *args)
 
        entry = &leaf->entries[args->index];
        if (entry->flags & XFS_ATTR_LOCAL) {
-               name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, args->index);
+               name_loc = xfs_attr_leaf_name_local(leaf, args->index);
                ASSERT(name_loc->namelen == args->namelen);
                ASSERT(memcmp(args->name, name_loc->nameval, args->namelen) == 0);
                valuelen = be16_to_cpu(name_loc->valuelen);
@@ -2050,7 +2046,7 @@ xfs_attr_leaf_getvalue(xfs_dabuf_t *bp, xfs_da_args_t *args)
                args->valuelen = valuelen;
                memcpy(args->value, &name_loc->nameval[args->namelen], valuelen);
        } else {
-               name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index);
+               name_rmt = xfs_attr_leaf_name_remote(leaf, args->index);
                ASSERT(name_rmt->namelen == args->namelen);
                ASSERT(memcmp(args->name, name_rmt->name, args->namelen) == 0);
                valuelen = be32_to_cpu(name_rmt->valuelen);
@@ -2143,7 +2139,7 @@ xfs_attr_leaf_moveents(xfs_attr_leafblock_t *leaf_s, int start_s,
                 * off for 6.2, should be revisited later.
                 */
                if (entry_s->flags & XFS_ATTR_INCOMPLETE) { /* skip partials? */
-                       memset(XFS_ATTR_LEAF_NAME(leaf_s, start_s + i), 0, tmp);
+                       memset(xfs_attr_leaf_name(leaf_s, start_s + i), 0, tmp);
                        be16_add_cpu(&hdr_s->usedbytes, -tmp);
                        be16_add_cpu(&hdr_s->count, -1);
                        entry_d--;      /* to compensate for ++ in loop hdr */
@@ -2160,11 +2156,11 @@ xfs_attr_leaf_moveents(xfs_attr_leafblock_t *leaf_s, int start_s,
                        entry_d->flags = entry_s->flags;
                        ASSERT(be16_to_cpu(entry_d->nameidx) + tmp
                                                        <= XFS_LBSIZE(mp));
-                       memmove(XFS_ATTR_LEAF_NAME(leaf_d, desti),
-                               XFS_ATTR_LEAF_NAME(leaf_s, start_s + i), tmp);
+                       memmove(xfs_attr_leaf_name(leaf_d, desti),
+                               xfs_attr_leaf_name(leaf_s, start_s + i), tmp);
                        ASSERT(be16_to_cpu(entry_s->nameidx) + tmp
                                                        <= XFS_LBSIZE(mp));
-                       memset(XFS_ATTR_LEAF_NAME(leaf_s, start_s + i), 0, tmp);
+                       memset(xfs_attr_leaf_name(leaf_s, start_s + i), 0, tmp);
                        be16_add_cpu(&hdr_s->usedbytes, -tmp);
                        be16_add_cpu(&hdr_d->usedbytes, tmp);
                        be16_add_cpu(&hdr_s->count, -1);
@@ -2276,12 +2272,12 @@ xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index)
 
        ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC);
        if (leaf->entries[index].flags & XFS_ATTR_LOCAL) {
-               name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, index);
-               size = XFS_ATTR_LEAF_ENTSIZE_LOCAL(name_loc->namelen,
+               name_loc = xfs_attr_leaf_name_local(leaf, index);
+               size = xfs_attr_leaf_entsize_local(name_loc->namelen,
                                                   be16_to_cpu(name_loc->valuelen));
        } else {
-               name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, index);
-               size = XFS_ATTR_LEAF_ENTSIZE_REMOTE(name_rmt->namelen);
+               name_rmt = xfs_attr_leaf_name_remote(leaf, index);
+               size = xfs_attr_leaf_entsize_remote(name_rmt->namelen);
        }
        return(size);
 }
@@ -2297,13 +2293,13 @@ xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize, int *local)
 {
        int size;
 
-       size = XFS_ATTR_LEAF_ENTSIZE_LOCAL(namelen, valuelen);
-       if (size < XFS_ATTR_LEAF_ENTSIZE_LOCAL_MAX(blocksize)) {
+       size = xfs_attr_leaf_entsize_local(namelen, valuelen);
+       if (size < xfs_attr_leaf_entsize_local_max(blocksize)) {
                if (local) {
                        *local = 1;
                }
        } else {
-               size = XFS_ATTR_LEAF_ENTSIZE_REMOTE(namelen);
+               size = xfs_attr_leaf_entsize_remote(namelen);
                if (local) {
                        *local = 0;
                }
@@ -2372,7 +2368,7 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
 
                if (entry->flags & XFS_ATTR_LOCAL) {
                        xfs_attr_leaf_name_local_t *name_loc =
-                               XFS_ATTR_LEAF_NAME_LOCAL(leaf, i);
+                               xfs_attr_leaf_name_local(leaf, i);
 
                        retval = context->put_listent(context,
                                                entry->flags,
@@ -2384,7 +2380,7 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
                                return retval;
                } else {
                        xfs_attr_leaf_name_remote_t *name_rmt =
-                               XFS_ATTR_LEAF_NAME_REMOTE(leaf, i);
+                               xfs_attr_leaf_name_remote(leaf, i);
 
                        int valuelen = be32_to_cpu(name_rmt->valuelen);
 
@@ -2468,11 +2464,11 @@ xfs_attr_leaf_clearflag(xfs_da_args_t *args)
 
 #ifdef DEBUG
        if (entry->flags & XFS_ATTR_LOCAL) {
-               name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, args->index);
+               name_loc = xfs_attr_leaf_name_local(leaf, args->index);
                namelen = name_loc->namelen;
                name = (char *)name_loc->nameval;
        } else {
-               name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index);
+               name_rmt = xfs_attr_leaf_name_remote(leaf, args->index);
                namelen = name_rmt->namelen;
                name = (char *)name_rmt->name;
        }
@@ -2487,7 +2483,7 @@ xfs_attr_leaf_clearflag(xfs_da_args_t *args)
 
        if (args->rmtblkno) {
                ASSERT((entry->flags & XFS_ATTR_LOCAL) == 0);
-               name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index);
+               name_rmt = xfs_attr_leaf_name_remote(leaf, args->index);
                name_rmt->valueblk = cpu_to_be32(args->rmtblkno);
                name_rmt->valuelen = cpu_to_be32(args->valuelen);
                xfs_da_log_buf(args->trans, bp,
@@ -2498,9 +2494,7 @@ xfs_attr_leaf_clearflag(xfs_da_args_t *args)
        /*
         * Commit the flag value change and start the next trans in series.
         */
-       error = xfs_attr_rolltrans(&args->trans, args->dp);
-
-       return(error);
+       return xfs_trans_roll(&args->trans, args->dp);
 }
 
 /*
@@ -2536,7 +2530,7 @@ xfs_attr_leaf_setflag(xfs_da_args_t *args)
        xfs_da_log_buf(args->trans, bp,
                        XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry)));
        if ((entry->flags & XFS_ATTR_LOCAL) == 0) {
-               name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index);
+               name_rmt = xfs_attr_leaf_name_remote(leaf, args->index);
                name_rmt->valueblk = 0;
                name_rmt->valuelen = 0;
                xfs_da_log_buf(args->trans, bp,
@@ -2547,9 +2541,7 @@ xfs_attr_leaf_setflag(xfs_da_args_t *args)
        /*
         * Commit the flag value change and start the next trans in series.
         */
-       error = xfs_attr_rolltrans(&args->trans, args->dp);
-
-       return(error);
+       return xfs_trans_roll(&args->trans, args->dp);
 }
 
 /*
@@ -2611,20 +2603,20 @@ xfs_attr_leaf_flipflags(xfs_da_args_t *args)
 
 #ifdef DEBUG
        if (entry1->flags & XFS_ATTR_LOCAL) {
-               name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf1, args->index);
+               name_loc = xfs_attr_leaf_name_local(leaf1, args->index);
                namelen1 = name_loc->namelen;
                name1 = (char *)name_loc->nameval;
        } else {
-               name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf1, args->index);
+               name_rmt = xfs_attr_leaf_name_remote(leaf1, args->index);
                namelen1 = name_rmt->namelen;
                name1 = (char *)name_rmt->name;
        }
        if (entry2->flags & XFS_ATTR_LOCAL) {
-               name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf2, args->index2);
+               name_loc = xfs_attr_leaf_name_local(leaf2, args->index2);
                namelen2 = name_loc->namelen;
                name2 = (char *)name_loc->nameval;
        } else {
-               name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf2, args->index2);
+               name_rmt = xfs_attr_leaf_name_remote(leaf2, args->index2);
                namelen2 = name_rmt->namelen;
                name2 = (char *)name_rmt->name;
        }
@@ -2641,7 +2633,7 @@ xfs_attr_leaf_flipflags(xfs_da_args_t *args)
                          XFS_DA_LOGRANGE(leaf1, entry1, sizeof(*entry1)));
        if (args->rmtblkno) {
                ASSERT((entry1->flags & XFS_ATTR_LOCAL) == 0);
-               name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf1, args->index);
+               name_rmt = xfs_attr_leaf_name_remote(leaf1, args->index);
                name_rmt->valueblk = cpu_to_be32(args->rmtblkno);
                name_rmt->valuelen = cpu_to_be32(args->valuelen);
                xfs_da_log_buf(args->trans, bp1,
@@ -2652,7 +2644,7 @@ xfs_attr_leaf_flipflags(xfs_da_args_t *args)
        xfs_da_log_buf(args->trans, bp2,
                          XFS_DA_LOGRANGE(leaf2, entry2, sizeof(*entry2)));
        if ((entry2->flags & XFS_ATTR_LOCAL) == 0) {
-               name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf2, args->index2);
+               name_rmt = xfs_attr_leaf_name_remote(leaf2, args->index2);
                name_rmt->valueblk = 0;
                name_rmt->valuelen = 0;
                xfs_da_log_buf(args->trans, bp2,
@@ -2665,7 +2657,7 @@ xfs_attr_leaf_flipflags(xfs_da_args_t *args)
        /*
         * Commit the flag value change and start the next trans in series.
         */
-       error = xfs_attr_rolltrans(&args->trans, args->dp);
+       error = xfs_trans_roll(&args->trans, args->dp);
 
        return(error);
 }
@@ -2723,7 +2715,7 @@ xfs_attr_root_inactive(xfs_trans_t **trans, xfs_inode_t *dp)
        /*
         * Commit the invalidate and start the next transaction.
         */
-       error = xfs_attr_rolltrans(trans, dp);
+       error = xfs_trans_roll(trans, dp);
 
        return (error);
 }
@@ -2825,7 +2817,8 @@ xfs_attr_node_inactive(xfs_trans_t **trans, xfs_inode_t *dp, xfs_dabuf_t *bp,
                /*
                 * Atomically commit the whole invalidate stuff.
                 */
-               if ((error = xfs_attr_rolltrans(trans, dp)))
+               error = xfs_trans_roll(trans, dp);
+               if (error)
                        return (error);
        }
 
@@ -2858,7 +2851,7 @@ xfs_attr_leaf_inactive(xfs_trans_t **trans, xfs_inode_t *dp, xfs_dabuf_t *bp)
        for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) {
                if (be16_to_cpu(entry->nameidx) &&
                    ((entry->flags & XFS_ATTR_LOCAL) == 0)) {
-                       name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, i);
+                       name_rmt = xfs_attr_leaf_name_remote(leaf, i);
                        if (name_rmt->valueblk)
                                count++;
                }
@@ -2886,7 +2879,7 @@ xfs_attr_leaf_inactive(xfs_trans_t **trans, xfs_inode_t *dp, xfs_dabuf_t *bp)
        for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) {
                if (be16_to_cpu(entry->nameidx) &&
                    ((entry->flags & XFS_ATTR_LOCAL) == 0)) {
-                       name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, i);
+                       name_rmt = xfs_attr_leaf_name_remote(leaf, i);
                        if (name_rmt->valueblk) {
                                lp->valueblk = be32_to_cpu(name_rmt->valueblk);
                                lp->valuelen = XFS_B_TO_FSB(dp->i_mount,
@@ -2964,7 +2957,8 @@ xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp,
                        /*
                         * Roll to next transaction.
                         */
-                       if ((error = xfs_attr_rolltrans(trans, dp)))
+                       error = xfs_trans_roll(trans, dp);
+                       if (error)
                                return (error);
                }
 
@@ -2974,60 +2968,3 @@ xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp,
 
        return(0);
 }
-
-
-/*
- * Roll from one trans in the sequence of PERMANENT transactions to the next.
- */
-int
-xfs_attr_rolltrans(xfs_trans_t **transp, xfs_inode_t *dp)
-{
-       xfs_trans_t *trans;
-       unsigned int logres, count;
-       int     error;
-
-       /*
-        * Ensure that the inode is always logged.
-        */
-       trans = *transp;
-       xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
-
-       /*
-        * Copy the critical parameters from one trans to the next.
-        */
-       logres = trans->t_log_res;
-       count = trans->t_log_count;
-       *transp = xfs_trans_dup(trans);
-
-       /*
-        * Commit the current transaction.
-        * If this commit failed, then it'd just unlock those items that
-        * are not marked ihold. That also means that a filesystem shutdown
-        * is in progress. The caller takes the responsibility to cancel
-        * the duplicate transaction that gets returned.
-        */
-       if ((error = xfs_trans_commit(trans, 0)))
-               return (error);
-
-       trans = *transp;
-
-       /*
-        * Reserve space in the log for th next transaction.
-        * This also pushes items in the "AIL", the list of logged items,
-        * out to disk if they are taking up space at the tail of the log
-        * that we want to use.  This requires that either nothing be locked
-        * across this call, or that anything that is locked be logged in
-        * the prior and the next transactions.
-        */
-       error = xfs_trans_reserve(trans, 0, logres, 0,
-                                 XFS_TRANS_PERM_LOG_RES, count);
-       /*
-        *  Ensure that the inode is in the new transaction and locked.
-        */
-       if (!error) {
-               xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL);
-               xfs_trans_ihold(trans, dp);
-       }
-       return (error);
-
-}