xfs_trans_binval(tp, cbp);
if (cur->bc_levels[0].bp == cbp)
cur->bc_levels[0].bp = NULL;
- xfs_iroot_realloc(ip, -1, whichfork);
+ xfs_iroot_realloc(ip, whichfork, 0);
ASSERT(ifp->if_broot == NULL);
ifp->if_format = XFS_DINODE_FMT_EXTENTS;
*logflagsp |= XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
* Make space in the inode incore. This needs to be undone if we fail
* to expand the root.
*/
- xfs_iroot_realloc(ip, 1, whichfork);
+ block = xfs_iroot_realloc(ip, whichfork, 1);
/*
* Fill in the root.
*/
- block = ifp->if_broot;
xfs_bmbt_init_block(ip, block, NULL, 1, 1);
/*
* Need a cursor. Can't allocate until bb_level is filled in.
out_unreserve_dquot:
xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
out_root_realloc:
- xfs_iroot_realloc(ip, -1, whichfork);
+ xfs_iroot_realloc(ip, whichfork, 0);
ifp->if_format = XFS_DINODE_FMT_EXTENTS;
ASSERT(ifp->if_broot == NULL);
xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
xfs_btree_copy_ptrs(cur, pp, &nptr, 1);
- xfs_iroot_realloc(cur->bc_ino.ip,
- 1 - xfs_btree_get_numrecs(cblock),
- cur->bc_ino.whichfork);
+ xfs_iroot_realloc(cur->bc_ino.ip, cur->bc_ino.whichfork, 1);
xfs_btree_setbuf(cur, level, cbp);
if (numrecs < cur->bc_ops->get_dmaxrecs(cur, level)) {
/* A root block that can be made bigger. */
- xfs_iroot_realloc(ip, 1, cur->bc_ino.whichfork);
+ xfs_iroot_realloc(ip, cur->bc_ino.whichfork,
+ numrecs + 1);
*stat = 1;
} else {
/* A root block that needs replacing */
xfs_btree_kill_iroot(
struct xfs_btree_cur *cur)
{
- int whichfork = cur->bc_ino.whichfork;
struct xfs_inode *ip = cur->bc_ino.ip;
- struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
struct xfs_btree_block *block;
struct xfs_btree_block *cblock;
union xfs_btree_key *kp;
union xfs_btree_ptr *cpp;
struct xfs_buf *cbp;
int level;
- int index;
int numrecs;
int error;
#ifdef DEBUG
ASSERT(xfs_btree_ptr_is_null(cur, &ptr));
#endif
- index = numrecs - cur->bc_ops->get_maxrecs(cur, level);
- if (index) {
- xfs_iroot_realloc(cur->bc_ino.ip, index,
- cur->bc_ino.whichfork);
- block = ifp->if_broot;
- }
+ block = xfs_iroot_realloc(cur->bc_ino.ip, cur->bc_ino.whichfork,
+ numrecs);
- be16_add_cpu(&block->bb_numrecs, index);
+ block->bb_numrecs = be16_to_cpu(numrecs);
ASSERT(block->bb_numrecs == cblock->bb_numrecs);
kp = xfs_btree_key_addr(cur, 1, block);
/*
* We're at the root level. First, shrink the root block in-memory.
* Try to get rid of the next level down. If we can't then there's
- * nothing left to do.
+ * nothing left to do. numrecs was decremented above.
*/
if (xfs_btree_at_iroot(cur, level)) {
- xfs_iroot_realloc(cur->bc_ino.ip, -1, cur->bc_ino.whichfork);
+ xfs_iroot_realloc(cur->bc_ino.ip, cur->bc_ino.whichfork,
+ numrecs);
error = xfs_btree_kill_iroot(cur);
if (error)
}
/*
- * Reallocate the space for if_broot based on the number of records
- * being added or deleted as indicated in rec_diff. Move the records
- * and pointers in if_broot to fit the new size. When shrinking this
- * will eliminate holes between the records and pointers created by
- * the caller. When growing this will create holes to be filled in
- * by the caller.
+ * Reallocate the space for if_broot based on the number of records. Move the
+ * records and pointers in if_broot to fit the new size. When shrinking this
+ * will eliminate holes between the records and pointers created by the caller.
+ * When growing this will create holes to be filled in by the caller.
*
* The caller must not request to add more records than would fit in
* the on-disk inode root. If the if_broot is currently NULL, then
* it can go to zero.
*
* ip -- the inode whose if_broot area is changing
- * ext_diff -- the change in the number of records, positive or negative,
- * requested for the if_broot array.
+ * whichfork -- which inode fork to change
+ * new_numrecs -- the new number of records requested for the if_broot array
+ *
+ * Returns the incore btree root block.
*/
-void
+struct xfs_btree_block *
xfs_iroot_realloc(
struct xfs_inode *ip,
- int rec_diff,
- int whichfork)
+ int whichfork,
+ unsigned int new_numrecs)
{
struct xfs_mount *mp = ip->i_mount;
struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
char *np;
char *op;
- size_t new_size;
- short old_size = ifp->if_broot_bytes;
- int cur_max;
- int new_max;
+ unsigned int new_size;
+ unsigned int old_size = ifp->if_broot_bytes;
/*
- * Handle the degenerate case quietly.
+ * Block mapping btrees do not support storing zero records; if this
+ * happens, the fork is being changed to FMT_EXTENTS. Free the broot
+ * and get out.
*/
- if (rec_diff == 0)
- return;
+ if (new_numrecs == 0)
+ return xfs_broot_realloc(ifp, 0);
+
+ new_size = xfs_bmap_broot_space_calc(mp, new_numrecs);
+
+ /* Handle the nop case quietly. */
+ if (new_size == old_size)
+ return ifp->if_broot;
+
+ if (new_size > old_size) {
+ unsigned int old_numrecs;
- if (rec_diff > 0) {
/*
* If there wasn't any memory allocated before, just
* allocate it now and get out.
*/
- if (old_size == 0) {
- new_size = xfs_bmap_broot_space_calc(mp, rec_diff);
- xfs_broot_realloc(ifp, new_size);
- return;
- }
+ if (old_size == 0)
+ return xfs_broot_realloc(ifp, new_size);
/*
* If there is already an existing if_broot, then we need
* location. The records don't change location because
* they are kept butted up against the btree block header.
*/
- cur_max = xfs_bmbt_maxrecs(mp, old_size, false);
- new_max = cur_max + rec_diff;
- new_size = xfs_bmap_broot_space_calc(mp, new_max);
-
+ old_numrecs = xfs_bmbt_maxrecs(mp, old_size, false);
xfs_broot_realloc(ifp, new_size);
op = (char *)xfs_bmap_broot_ptr_addr(mp, ifp->if_broot, 1,
old_size);
(int)new_size);
ASSERT(xfs_bmap_bmdr_space(ifp->if_broot) <=
xfs_inode_fork_size(ip, whichfork));
- memmove(np, op, cur_max * (uint)sizeof(xfs_fsblock_t));
- return;
+ memmove(np, op, old_numrecs * (uint)sizeof(xfs_fsblock_t));
+ return ifp->if_broot;
}
/*
- * rec_diff is less than 0. In this case, we are shrinking the
- * if_broot buffer. It must already exist. If we go to zero
- * records, just get rid of the root and clear the status bit.
+ * We're reducing, but not totally eliminating, numrecs. In this case,
+ * we are shrinking the if_broot buffer, so it must already exist.
*/
- ASSERT(ifp->if_broot != NULL && old_size > 0);
- cur_max = xfs_bmbt_maxrecs(mp, old_size, false);
- new_max = cur_max + rec_diff;
- ASSERT(new_max >= 0);
- if (new_max > 0)
- new_size = xfs_bmap_broot_space_calc(mp, new_max);
- else
- new_size = 0;
- if (new_size == 0) {
- xfs_broot_realloc(ifp, 0);
- return;
- }
+ ASSERT(ifp->if_broot != NULL && old_size > 0 && new_size > 0);
/*
* Shrink the btree root by moving the bmbt pointers, since they are
op = (char *)xfs_bmap_broot_ptr_addr(mp, ifp->if_broot, 1, old_size);
np = (char *)xfs_bmap_broot_ptr_addr(mp, ifp->if_broot, 1,
(int)new_size);
- memmove(np, op, new_max * (uint)sizeof(xfs_fsblock_t));
+ memmove(np, op, new_numrecs * (uint)sizeof(xfs_fsblock_t));
xfs_broot_realloc(ifp, new_size);
ASSERT(xfs_bmap_bmdr_space(ifp->if_broot) <=
xfs_inode_fork_size(ip, whichfork));
+ return ifp->if_broot;
}
projects / thirdparty / kernel / linux.git / commitdiff
