@@ -484,8 +484,8 @@ xfs_alloc_fixup_trees(
struct xfs_btree_block *bnoblock;
struct xfs_btree_block *cntblock;
- bnoblock = XFS_BUF_TO_BLOCK(bno_cur->bc_bufs[0]);
- cntblock = XFS_BUF_TO_BLOCK(cnt_cur->bc_bufs[0]);
+ bnoblock = XFS_BUF_TO_BLOCK(bno_cur->bc_levels[0].bp);
+ cntblock = XFS_BUF_TO_BLOCK(cnt_cur->bc_levels[0].bp);
if (XFS_IS_CORRUPT(mp,
bnoblock->bb_numrecs !=
@@ -1508,7 +1508,7 @@ xfs_alloc_ag_vextent_lastblock(
* than minlen.
*/
if (*len || args->alignment > 1) {
- acur->cnt->bc_ptrs[0] = 1;
+ acur->cnt->bc_levels[0].ptr = 1;
do {
error = xfs_alloc_get_rec(acur->cnt, bno, len, &i);
if (error)
@@ -233,10 +233,10 @@ xfs_bmap_get_bp(
return NULL;
for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) {
- if (!cur->bc_bufs[i])
+ if (!cur->bc_levels[i].bp)
break;
- if (xfs_buf_daddr(cur->bc_bufs[i]) == bno)
- return cur->bc_bufs[i];
+ if (xfs_buf_daddr(cur->bc_levels[i].bp) == bno)
+ return cur->bc_levels[i].bp;
}
/* Chase down all the log items to see if the bp is there */
@@ -622,8 +622,8 @@ xfs_bmap_btree_to_extents(
ip->i_nblocks--;
xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
xfs_trans_binval(tp, cbp);
- if (cur->bc_bufs[0] == cbp)
- cur->bc_bufs[0] = NULL;
+ if (cur->bc_levels[0].bp == cbp)
+ cur->bc_levels[0].bp = NULL;
xfs_iroot_realloc(ip, -1, whichfork);
ASSERT(ifp->if_broot == NULL);
ifp->if_format = XFS_DINODE_FMT_EXTENTS;
@@ -364,8 +364,8 @@ xfs_btree_del_cursor(
* way we won't have initialized all the entries down to 0.
*/
for (i = 0; i < cur->bc_nlevels; i++) {
- if (cur->bc_bufs[i])
- xfs_trans_brelse(cur->bc_tp, cur->bc_bufs[i]);
+ if (cur->bc_levels[i].bp)
+ xfs_trans_brelse(cur->bc_tp, cur->bc_levels[i].bp);
else if (!error)
break;
}
@@ -412,9 +412,9 @@ xfs_btree_dup_cursor(
* For each level current, re-get the buffer and copy the ptr value.
*/
for (i = 0; i < new->bc_nlevels; i++) {
- new->bc_ptrs[i] = cur->bc_ptrs[i];
- new->bc_ra[i] = cur->bc_ra[i];
- bp = cur->bc_bufs[i];
+ new->bc_levels[i].ptr = cur->bc_levels[i].ptr;
+ new->bc_levels[i].ra = cur->bc_levels[i].ra;
+ bp = cur->bc_levels[i].bp;
if (bp) {
error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
xfs_buf_daddr(bp), mp->m_bsize,
@@ -426,7 +426,7 @@ xfs_btree_dup_cursor(
return error;
}
}
- new->bc_bufs[i] = bp;
+ new->bc_levels[i].bp = bp;
}
*ncur = new;
return 0;
@@ -678,7 +678,7 @@ xfs_btree_get_block(
return xfs_btree_get_iroot(cur);
}
- *bpp = cur->bc_bufs[level];
+ *bpp = cur->bc_levels[level].bp;
return XFS_BUF_TO_BLOCK(*bpp);
}
@@ -708,7 +708,7 @@ xfs_btree_firstrec(
/*
* Set the ptr value to 1, that's the first record/key.
*/
- cur->bc_ptrs[level] = 1;
+ cur->bc_levels[level].ptr = 1;
return 1;
}
@@ -738,7 +738,7 @@ xfs_btree_lastrec(
/*
* Set the ptr value to numrecs, that's the last record/key.
*/
- cur->bc_ptrs[level] = be16_to_cpu(block->bb_numrecs);
+ cur->bc_levels[level].ptr = be16_to_cpu(block->bb_numrecs);
return 1;
}
@@ -919,11 +919,11 @@ xfs_btree_readahead(
(lev == cur->bc_nlevels - 1))
return 0;
- if ((cur->bc_ra[lev] | lr) == cur->bc_ra[lev])
+ if ((cur->bc_levels[lev].ra | lr) == cur->bc_levels[lev].ra)
return 0;
- cur->bc_ra[lev] |= lr;
- block = XFS_BUF_TO_BLOCK(cur->bc_bufs[lev]);
+ cur->bc_levels[lev].ra |= lr;
+ block = XFS_BUF_TO_BLOCK(cur->bc_levels[lev].bp);
if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
return xfs_btree_readahead_lblock(cur, lr, block);
@@ -988,22 +988,22 @@ xfs_btree_setbuf(
{
struct xfs_btree_block *b; /* btree block */
- if (cur->bc_bufs[lev])
- xfs_trans_brelse(cur->bc_tp, cur->bc_bufs[lev]);
- cur->bc_bufs[lev] = bp;
- cur->bc_ra[lev] = 0;
+ if (cur->bc_levels[lev].bp)
+ xfs_trans_brelse(cur->bc_tp, cur->bc_levels[lev].bp);
+ cur->bc_levels[lev].bp = bp;
+ cur->bc_levels[lev].ra = 0;
b = XFS_BUF_TO_BLOCK(bp);
if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {
if (b->bb_u.l.bb_leftsib == cpu_to_be64(NULLFSBLOCK))
- cur->bc_ra[lev] |= XFS_BTCUR_LEFTRA;
+ cur->bc_levels[lev].ra |= XFS_BTCUR_LEFTRA;
if (b->bb_u.l.bb_rightsib == cpu_to_be64(NULLFSBLOCK))
- cur->bc_ra[lev] |= XFS_BTCUR_RIGHTRA;
+ cur->bc_levels[lev].ra |= XFS_BTCUR_RIGHTRA;
} else {
if (b->bb_u.s.bb_leftsib == cpu_to_be32(NULLAGBLOCK))
- cur->bc_ra[lev] |= XFS_BTCUR_LEFTRA;
+ cur->bc_levels[lev].ra |= XFS_BTCUR_LEFTRA;
if (b->bb_u.s.bb_rightsib == cpu_to_be32(NULLAGBLOCK))
- cur->bc_ra[lev] |= XFS_BTCUR_RIGHTRA;
+ cur->bc_levels[lev].ra |= XFS_BTCUR_RIGHTRA;
}
}
@@ -1545,7 +1545,7 @@ xfs_btree_increment(
#endif
/* We're done if we remain in the block after the increment. */
- if (++cur->bc_ptrs[level] <= xfs_btree_get_numrecs(block))
+ if (++cur->bc_levels[level].ptr <= xfs_btree_get_numrecs(block))
goto out1;
/* Fail if we just went off the right edge of the tree. */
@@ -1568,7 +1568,7 @@ xfs_btree_increment(
goto error0;
#endif
- if (++cur->bc_ptrs[lev] <= xfs_btree_get_numrecs(block))
+ if (++cur->bc_levels[lev].ptr <= xfs_btree_get_numrecs(block))
break;
/* Read-ahead the right block for the next loop. */
@@ -1595,14 +1595,14 @@ xfs_btree_increment(
for (block = xfs_btree_get_block(cur, lev, &bp); lev > level; ) {
union xfs_btree_ptr *ptrp;
- ptrp = xfs_btree_ptr_addr(cur, cur->bc_ptrs[lev], block);
+ ptrp = xfs_btree_ptr_addr(cur, cur->bc_levels[lev].ptr, block);
--lev;
error = xfs_btree_read_buf_block(cur, ptrp, 0, &block, &bp);
if (error)
goto error0;
xfs_btree_setbuf(cur, lev, bp);
- cur->bc_ptrs[lev] = 1;
+ cur->bc_levels[lev].ptr = 1;
}
out1:
*stat = 1;
@@ -1638,7 +1638,7 @@ xfs_btree_decrement(
xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA);
/* We're done if we remain in the block after the decrement. */
- if (--cur->bc_ptrs[level] > 0)
+ if (--cur->bc_levels[level].ptr > 0)
goto out1;
/* Get a pointer to the btree block. */
@@ -1662,7 +1662,7 @@ xfs_btree_decrement(
* Stop when we don't go off the left edge of a block.
*/
for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
- if (--cur->bc_ptrs[lev] > 0)
+ if (--cur->bc_levels[lev].ptr > 0)
break;
/* Read-ahead the left block for the next loop. */
xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA);
@@ -1688,13 +1688,13 @@ xfs_btree_decrement(
for (block = xfs_btree_get_block(cur, lev, &bp); lev > level; ) {
union xfs_btree_ptr *ptrp;
- ptrp = xfs_btree_ptr_addr(cur, cur->bc_ptrs[lev], block);
+ ptrp = xfs_btree_ptr_addr(cur, cur->bc_levels[lev].ptr, block);
--lev;
error = xfs_btree_read_buf_block(cur, ptrp, 0, &block, &bp);
if (error)
goto error0;
xfs_btree_setbuf(cur, lev, bp);
- cur->bc_ptrs[lev] = xfs_btree_get_numrecs(block);
+ cur->bc_levels[lev].ptr = xfs_btree_get_numrecs(block);
}
out1:
*stat = 1;
@@ -1732,7 +1732,7 @@ xfs_btree_lookup_get_block(
*
* Otherwise throw it away and get a new one.
*/
- bp = cur->bc_bufs[level];
+ bp = cur->bc_levels[level].bp;
error = xfs_btree_ptr_to_daddr(cur, pp, &daddr);
if (error)
return error;
@@ -1861,7 +1861,7 @@ xfs_btree_lookup(
return -EFSCORRUPTED;
}
- cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE;
+ cur->bc_levels[0].ptr = dir != XFS_LOOKUP_LE;
*stat = 0;
return 0;
}
@@ -1913,7 +1913,7 @@ xfs_btree_lookup(
if (error)
goto error0;
- cur->bc_ptrs[level] = keyno;
+ cur->bc_levels[level].ptr = keyno;
}
}
@@ -1930,7 +1930,7 @@ xfs_btree_lookup(
!xfs_btree_ptr_is_null(cur, &ptr)) {
int i;
- cur->bc_ptrs[0] = keyno;
+ cur->bc_levels[0].ptr = keyno;
error = xfs_btree_increment(cur, 0, &i);
if (error)
goto error0;
@@ -1941,7 +1941,7 @@ xfs_btree_lookup(
}
} else if (dir == XFS_LOOKUP_LE && diff > 0)
keyno--;
- cur->bc_ptrs[0] = keyno;
+ cur->bc_levels[0].ptr = keyno;
/* Return if we succeeded or not. */
if (keyno == 0 || keyno > xfs_btree_get_numrecs(block))
@@ -2101,7 +2101,7 @@ __xfs_btree_updkeys(
if (error)
return error;
#endif
- ptr = cur->bc_ptrs[level];
+ ptr = cur->bc_levels[level].ptr;
nlkey = xfs_btree_key_addr(cur, ptr, block);
nhkey = xfs_btree_high_key_addr(cur, ptr, block);
if (!force_all &&
@@ -2168,7 +2168,7 @@ xfs_btree_update_keys(
if (error)
return error;
#endif
- ptr = cur->bc_ptrs[level];
+ ptr = cur->bc_levels[level].ptr;
kp = xfs_btree_key_addr(cur, ptr, block);
xfs_btree_copy_keys(cur, kp, &key, 1);
xfs_btree_log_keys(cur, bp, ptr, ptr);
@@ -2202,7 +2202,7 @@ xfs_btree_update(
goto error0;
#endif
/* Get the address of the rec to be updated. */
- ptr = cur->bc_ptrs[0];
+ ptr = cur->bc_levels[0].ptr;
rp = xfs_btree_rec_addr(cur, ptr, block);
/* Fill in the new contents and log them. */
@@ -2277,7 +2277,7 @@ xfs_btree_lshift(
* If the cursor entry is the one that would be moved, don't
* do it... it's too complicated.
*/
- if (cur->bc_ptrs[level] <= 1)
+ if (cur->bc_levels[level].ptr <= 1)
goto out0;
/* Set up the left neighbor as "left". */
@@ -2411,7 +2411,7 @@ xfs_btree_lshift(
goto error0;
/* Slide the cursor value left one. */
- cur->bc_ptrs[level]--;
+ cur->bc_levels[level].ptr--;
*stat = 1;
return 0;
@@ -2473,7 +2473,7 @@ xfs_btree_rshift(
* do it... it's too complicated.
*/
lrecs = xfs_btree_get_numrecs(left);
- if (cur->bc_ptrs[level] >= lrecs)
+ if (cur->bc_levels[level].ptr >= lrecs)
goto out0;
/* Set up the right neighbor as "right". */
@@ -2661,7 +2661,7 @@ __xfs_btree_split(
*/
lrecs = xfs_btree_get_numrecs(left);
rrecs = lrecs / 2;
- if ((lrecs & 1) && cur->bc_ptrs[level] <= rrecs + 1)
+ if ((lrecs & 1) && cur->bc_levels[level].ptr <= rrecs + 1)
rrecs++;
src_index = (lrecs - rrecs + 1);
@@ -2757,9 +2757,9 @@ __xfs_btree_split(
* If it's just pointing past the last entry in left, then we'll
* insert there, so don't change anything in that case.
*/
- if (cur->bc_ptrs[level] > lrecs + 1) {
+ if (cur->bc_levels[level].ptr > lrecs + 1) {
xfs_btree_setbuf(cur, level, rbp);
- cur->bc_ptrs[level] -= lrecs;
+ cur->bc_levels[level].ptr -= lrecs;
}
/*
* If there are more levels, we'll need another cursor which refers
@@ -2769,7 +2769,7 @@ __xfs_btree_split(
error = xfs_btree_dup_cursor(cur, curp);
if (error)
goto error0;
- (*curp)->bc_ptrs[level + 1]++;
+ (*curp)->bc_levels[level + 1].ptr++;
}
*ptrp = rptr;
*stat = 1;
@@ -2935,7 +2935,7 @@ xfs_btree_new_iroot(
xfs_btree_set_numrecs(block, 1);
cur->bc_nlevels++;
ASSERT(cur->bc_nlevels <= XFS_BTREE_MAXLEVELS);
- cur->bc_ptrs[level + 1] = 1;
+ cur->bc_levels[level + 1].ptr = 1;
kp = xfs_btree_key_addr(cur, 1, block);
ckp = xfs_btree_key_addr(cur, 1, cblock);
@@ -3096,7 +3096,7 @@ xfs_btree_new_root(
/* Fix up the cursor. */
xfs_btree_setbuf(cur, cur->bc_nlevels, nbp);
- cur->bc_ptrs[cur->bc_nlevels] = nptr;
+ cur->bc_levels[cur->bc_nlevels].ptr = nptr;
cur->bc_nlevels++;
ASSERT(cur->bc_nlevels <= XFS_BTREE_MAXLEVELS);
*stat = 1;
@@ -3155,7 +3155,7 @@ xfs_btree_make_block_unfull(
return error;
if (*stat) {
- *oindex = *index = cur->bc_ptrs[level];
+ *oindex = *index = cur->bc_levels[level].ptr;
return 0;
}
@@ -3170,7 +3170,7 @@ xfs_btree_make_block_unfull(
return error;
- *index = cur->bc_ptrs[level];
+ *index = cur->bc_levels[level].ptr;
return 0;
}
@@ -3217,7 +3217,7 @@ xfs_btree_insrec(
}
/* If we're off the left edge, return failure. */
- ptr = cur->bc_ptrs[level];
+ ptr = cur->bc_levels[level].ptr;
if (ptr == 0) {
*stat = 0;
return 0;
@@ -3560,7 +3560,7 @@ xfs_btree_kill_iroot(
if (error)
return error;
- cur->bc_bufs[level - 1] = NULL;
+ cur->bc_levels[level - 1].bp = NULL;
be16_add_cpu(&block->bb_level, -1);
xfs_trans_log_inode(cur->bc_tp, ip,
XFS_ILOG_CORE | xfs_ilog_fbroot(cur->bc_ino.whichfork));
@@ -3593,8 +3593,8 @@ xfs_btree_kill_root(
if (error)
return error;
- cur->bc_bufs[level] = NULL;
- cur->bc_ra[level] = 0;
+ cur->bc_levels[level].bp = NULL;
+ cur->bc_levels[level].ra = 0;
cur->bc_nlevels--;
return 0;
@@ -3653,7 +3653,7 @@ xfs_btree_delrec(
tcur = NULL;
/* Get the index of the entry being deleted, check for nothing there. */
- ptr = cur->bc_ptrs[level];
+ ptr = cur->bc_levels[level].ptr;
if (ptr == 0) {
*stat = 0;
return 0;
@@ -3963,7 +3963,7 @@ xfs_btree_delrec(
xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
tcur = NULL;
if (level == 0)
- cur->bc_ptrs[0]++;
+ cur->bc_levels[0].ptr++;
*stat = 1;
return 0;
@@ -4100,9 +4100,9 @@ xfs_btree_delrec(
* cursor to the left block, and fix up the index.
*/
if (bp != lbp) {
- cur->bc_bufs[level] = lbp;
- cur->bc_ptrs[level] += lrecs;
- cur->bc_ra[level] = 0;
+ cur->bc_levels[level].bp = lbp;
+ cur->bc_levels[level].ptr += lrecs;
+ cur->bc_levels[level].ra = 0;
}
/*
* If we joined with the right neighbor and there's a level above
@@ -4122,16 +4122,16 @@ xfs_btree_delrec(
* We can't use decrement because it would change the next level up.
*/
if (level > 0)
- cur->bc_ptrs[level]--;
+ cur->bc_levels[level].ptr--;
/*
* We combined blocks, so we have to update the parent keys if the
- * btree supports overlapped intervals. However, bc_ptrs[level + 1]
- * points to the old block so that the caller knows which record to
- * delete. Therefore, the caller must be savvy enough to call updkeys
- * for us if we return stat == 2. The other exit points from this
- * function don't require deletions further up the tree, so they can
- * call updkeys directly.
+ * btree supports overlapped intervals. However,
+ * bc_levels[level + 1].ptr points to the old block so that the caller
+ * knows which record to delete. Therefore, the caller must be savvy
+ * enough to call updkeys for us if we return stat == 2. The other
+ * exit points from this function don't require deletions further up
+ * the tree, so they can call updkeys directly.
*/
/* Return value means the next level up has something to do. */
@@ -4185,7 +4185,7 @@ xfs_btree_delete(
if (i == 0) {
for (level = 1; level < cur->bc_nlevels; level++) {
- if (cur->bc_ptrs[level] == 0) {
+ if (cur->bc_levels[level].ptr == 0) {
error = xfs_btree_decrement(cur, level, &i);
if (error)
goto error0;
@@ -4216,7 +4216,7 @@ xfs_btree_get_rec(
int error; /* error return value */
#endif
- ptr = cur->bc_ptrs[0];
+ ptr = cur->bc_levels[0].ptr;
block = xfs_btree_get_block(cur, 0, &bp);
#ifdef DEBUG
@@ -4664,23 +4664,25 @@ xfs_btree_overlapped_query_range(
if (error)
goto out;
#endif
- cur->bc_ptrs[level] = 1;
+ cur->bc_levels[level].ptr = 1;
while (level < cur->bc_nlevels) {
block = xfs_btree_get_block(cur, level, &bp);
/* End of node, pop back towards the root. */
- if (cur->bc_ptrs[level] > be16_to_cpu(block->bb_numrecs)) {
+ if (cur->bc_levels[level].ptr >
+ be16_to_cpu(block->bb_numrecs)) {
pop_up:
if (level < cur->bc_nlevels - 1)
- cur->bc_ptrs[level + 1]++;
+ cur->bc_levels[level + 1].ptr++;
level++;
continue;
}
if (level == 0) {
/* Handle a leaf node. */
- recp = xfs_btree_rec_addr(cur, cur->bc_ptrs[0], block);
+ recp = xfs_btree_rec_addr(cur, cur->bc_levels[0].ptr,
+ block);
cur->bc_ops->init_high_key_from_rec(&rec_hkey, recp);
ldiff = cur->bc_ops->diff_two_keys(cur, &rec_hkey,
@@ -4703,14 +4705,15 @@ xfs_btree_overlapped_query_range(
/* Record is larger than high key; pop. */
goto pop_up;
}
- cur->bc_ptrs[level]++;
+ cur->bc_levels[level].ptr++;
continue;
}
/* Handle an internal node. */
- lkp = xfs_btree_key_addr(cur, cur->bc_ptrs[level], block);
- hkp = xfs_btree_high_key_addr(cur, cur->bc_ptrs[level], block);
- pp = xfs_btree_ptr_addr(cur, cur->bc_ptrs[level], block);
+ lkp = xfs_btree_key_addr(cur, cur->bc_levels[level].ptr, block);
+ hkp = xfs_btree_high_key_addr(cur, cur->bc_levels[level].ptr,
+ block);
+ pp = xfs_btree_ptr_addr(cur, cur->bc_levels[level].ptr, block);
ldiff = cur->bc_ops->diff_two_keys(cur, hkp, low_key);
hdiff = cur->bc_ops->diff_two_keys(cur, high_key, lkp);
@@ -4733,13 +4736,13 @@ xfs_btree_overlapped_query_range(
if (error)
goto out;
#endif
- cur->bc_ptrs[level] = 1;
+ cur->bc_levels[level].ptr = 1;
continue;
} else if (hdiff < 0) {
/* The low key is larger than the upper range; pop. */
goto pop_up;
}
- cur->bc_ptrs[level]++;
+ cur->bc_levels[level].ptr++;
}
out:
@@ -4750,13 +4753,14 @@ xfs_btree_overlapped_query_range(
* with a zero-results range query, so release the buffers if we
* failed to return any results.
*/
- if (cur->bc_bufs[0] == NULL) {
+ if (cur->bc_levels[0].bp == NULL) {
for (i = 0; i < cur->bc_nlevels; i++) {
- if (cur->bc_bufs[i]) {
- xfs_trans_brelse(cur->bc_tp, cur->bc_bufs[i]);
- cur->bc_bufs[i] = NULL;
- cur->bc_ptrs[i] = 0;
- cur->bc_ra[i] = 0;
+ if (cur->bc_levels[i].bp) {
+ xfs_trans_brelse(cur->bc_tp,
+ cur->bc_levels[i].bp);
+ cur->bc_levels[i].bp = NULL;
+ cur->bc_levels[i].ptr = 0;
+ cur->bc_levels[i].ra = 0;
}
}
}
@@ -4918,7 +4922,7 @@ xfs_btree_has_more_records(
block = xfs_btree_get_block(cur, 0, &bp);
/* There are still records in this block. */
- if (cur->bc_ptrs[0] < xfs_btree_get_numrecs(block))
+ if (cur->bc_levels[0].ptr < xfs_btree_get_numrecs(block))
return true;
/* There are more record blocks. */
@@ -212,6 +212,19 @@ struct xfs_btree_cur_ino {
#define XFS_BTCUR_BMBT_INVALID_OWNER (1 << 1)
};
+struct xfs_btree_level {
+ /* buffer pointer */
+ struct xfs_buf *bp;
+
+ /* key/record number */
+ uint16_t ptr;
+
+ /* readahead info */
+#define XFS_BTCUR_LEFTRA (1 << 0) /* left sibling has been read-ahead */
+#define XFS_BTCUR_RIGHTRA (1 << 1) /* right sibling has been read-ahead */
+ uint16_t ra;
+};
+
/*
* Btree cursor structure.
* This collects all information needed by the btree code in one place.
@@ -223,11 +236,6 @@ struct xfs_btree_cur
const struct xfs_btree_ops *bc_ops;
uint bc_flags; /* btree features - below */
union xfs_btree_irec bc_rec; /* current insert/search record value */
- struct xfs_buf *bc_bufs[XFS_BTREE_MAXLEVELS]; /* buf ptr per level */
- int bc_ptrs[XFS_BTREE_MAXLEVELS]; /* key/record # */
- uint8_t bc_ra[XFS_BTREE_MAXLEVELS]; /* readahead bits */
-#define XFS_BTCUR_LEFTRA 1 /* left sibling has been read-ahead */
-#define XFS_BTCUR_RIGHTRA 2 /* right sibling has been read-ahead */
uint8_t bc_nlevels; /* number of levels in the tree */
xfs_btnum_t bc_btnum; /* identifies which btree type */
int bc_statoff; /* offset of btre stats array */
@@ -242,8 +250,22 @@ struct xfs_btree_cur
struct xfs_btree_cur_ag bc_ag;
struct xfs_btree_cur_ino bc_ino;
};
+
+ /* Must be at the end of the struct! */
+ struct xfs_btree_level bc_levels[];
};
+/*
+ * Compute the size of a btree cursor that can handle a btree of a given
+ * height. The bc_levels array handles node and leaf blocks, so its size
+ * is exactly nlevels.
+ */
+static inline size_t
+xfs_btree_cur_sizeof(unsigned int nlevels)
+{
+ return struct_size((struct xfs_btree_cur *)NULL, bc_levels, nlevels);
+}
+
/* cursor flags */
#define XFS_BTREE_LONG_PTRS (1<<0) /* pointers are 64bits long */
#define XFS_BTREE_ROOT_IN_INODE (1<<1) /* root may be variable size */
@@ -257,7 +279,6 @@ struct xfs_btree_cur
*/
#define XFS_BTREE_STAGING (1<<5)
-
#define XFS_BTREE_NOERROR 0
#define XFS_BTREE_ERROR 1