STATIC void xfs_inobt_log_recs(xfs_btree_cur_t *, xfs_buf_t *, int, int);
STATIC int xfs_inobt_lshift(xfs_btree_cur_t *, int, int *);
STATIC int xfs_inobt_newroot(xfs_btree_cur_t *, int *);
-STATIC int xfs_inobt_rshift(xfs_btree_cur_t *, int, int *);
STATIC int xfs_inobt_split(xfs_btree_cur_t *, int, xfs_agblock_t *,
xfs_inobt_key_t *, xfs_btree_cur_t **, int *);
-STATIC int xfs_inobt_updkey(xfs_btree_cur_t *, xfs_inobt_key_t *, int);
/*
* Single level of the xfs_inobt_delete record deletion routine.
cur->bc_bufs[level] = NULL;
cur->bc_nlevels--;
} else if (level > 0 &&
- (error = xfs_inobt_decrement(cur, level, &i)))
+ (error = xfs_btree_decrement(cur, level, &i)))
return error;
*stat = 1;
return 0;
* If we deleted the leftmost entry in the block, update the
* key values above us in the tree.
*/
- if (ptr == 1 && (error = xfs_inobt_updkey(cur, kp, level + 1)))
+ if (ptr == 1 && (error = xfs_btree_updkey(cur, (union xfs_btree_key *)kp, level + 1)))
return error;
/*
* If the number of records remaining in the block is at least
*/
if (numrecs >= XFS_INOBT_BLOCK_MINRECS(level, cur)) {
if (level > 0 &&
- (error = xfs_inobt_decrement(cur, level, &i)))
+ (error = xfs_btree_decrement(cur, level, &i)))
return error;
*stat = 1;
return 0;
*/
i = xfs_btree_lastrec(tcur, level);
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
- if ((error = xfs_inobt_increment(tcur, level, &i)))
+ if ((error = xfs_btree_increment(tcur, level, &i)))
goto error0;
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
i = xfs_btree_lastrec(tcur, level);
xfs_btree_del_cursor(tcur,
XFS_BTREE_NOERROR);
if (level > 0 &&
- (error = xfs_inobt_decrement(cur, level,
+ (error = xfs_btree_decrement(cur, level,
&i)))
return error;
*stat = 1;
rrecs = be16_to_cpu(right->bb_numrecs);
if (lbno != NULLAGBLOCK) {
xfs_btree_firstrec(tcur, level);
- if ((error = xfs_inobt_decrement(tcur, level, &i)))
+ if ((error = xfs_btree_decrement(tcur, level, &i)))
goto error0;
}
}
* previous block.
*/
xfs_btree_firstrec(tcur, level);
- if ((error = xfs_inobt_decrement(tcur, level, &i)))
+ if ((error = xfs_btree_decrement(tcur, level, &i)))
goto error0;
xfs_btree_firstrec(tcur, level);
/*
*/
if (be16_to_cpu(left->bb_numrecs) - 1 >=
XFS_INOBT_BLOCK_MINRECS(level, cur)) {
- if ((error = xfs_inobt_rshift(tcur, level, &i)))
+ if ((error = xfs_btree_rshift(tcur, level, &i)))
goto error0;
if (i) {
ASSERT(be16_to_cpu(block->bb_numrecs) >=
* Just return. This is probably a logic error, but it's not fatal.
*/
else {
- if (level > 0 && (error = xfs_inobt_decrement(cur, level, &i)))
+ if (level > 0 && (error = xfs_btree_decrement(cur, level, &i)))
return error;
*stat = 1;
return 0;
* us, increment the cursor at that level.
*/
else if (level + 1 < cur->bc_nlevels &&
- (error = xfs_alloc_increment(cur, level + 1, &i)))
+ (error = xfs_btree_increment(cur, level + 1, &i)))
return error;
/*
* Fix up the number of records in the surviving block.
/*
* First, try shifting an entry to the right neighbor.
*/
- if ((error = xfs_inobt_rshift(cur, level, &i)))
+ if ((error = xfs_btree_rshift(cur, level, &i)))
return error;
if (i) {
/* nothing */
/*
* If we inserted at the start of a block, update the parents' keys.
*/
- if (optr == 1 && (error = xfs_inobt_updkey(cur, &key, level + 1)))
+ if (optr == 1 && (error = xfs_btree_updkey(cur, (union xfs_btree_key *)&key, level + 1)))
return error;
/*
* Return the new block number, if any.
xfs_trans_log_buf(cur->bc_tp, bp, first, last);
}
-/*
- * Lookup the record. The cursor is made to point to it, based on dir.
- * Return 0 if can't find any such record, 1 for success.
- */
-STATIC int /* error */
-xfs_inobt_lookup(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_lookup_t dir, /* <=, ==, or >= */
- int *stat) /* success/failure */
-{
- xfs_agblock_t agbno; /* a.g. relative btree block number */
- xfs_agnumber_t agno; /* allocation group number */
- xfs_inobt_block_t *block=NULL; /* current btree block */
- __int64_t diff; /* difference for the current key */
- int error; /* error return value */
- int keyno=0; /* current key number */
- int level; /* level in the btree */
- xfs_mount_t *mp; /* file system mount point */
-
- /*
- * Get the allocation group header, and the root block number.
- */
- mp = cur->bc_mp;
- {
- xfs_agi_t *agi; /* a.g. inode header */
-
- agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp);
- agno = be32_to_cpu(agi->agi_seqno);
- agbno = be32_to_cpu(agi->agi_root);
- }
- /*
- * Iterate over each level in the btree, starting at the root.
- * For each level above the leaves, find the key we need, based
- * on the lookup record, then follow the corresponding block
- * pointer down to the next level.
- */
- for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) {
- xfs_buf_t *bp; /* buffer pointer for btree block */
- xfs_daddr_t d; /* disk address of btree block */
-
- /*
- * Get the disk address we're looking for.
- */
- d = XFS_AGB_TO_DADDR(mp, agno, agbno);
- /*
- * If the old buffer at this level is for a different block,
- * throw it away, otherwise just use it.
- */
- bp = cur->bc_bufs[level];
- if (bp && XFS_BUF_ADDR(bp) != d)
- bp = NULL;
- if (!bp) {
- /*
- * Need to get a new buffer. Read it, then
- * set it in the cursor, releasing the old one.
- */
- if ((error = xfs_btree_read_bufs(mp, cur->bc_tp,
- agno, agbno, 0, &bp, XFS_INO_BTREE_REF)))
- return error;
- xfs_btree_setbuf(cur, level, bp);
- /*
- * Point to the btree block, now that we have the buffer
- */
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- if ((error = xfs_btree_check_sblock(cur, block, level,
- bp)))
- return error;
- } else
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- /*
- * If we already had a key match at a higher level, we know
- * we need to use the first entry in this block.
- */
- if (diff == 0)
- keyno = 1;
- /*
- * Otherwise we need to search this block. Do a binary search.
- */
- else {
- int high; /* high entry number */
- xfs_inobt_key_t *kkbase=NULL;/* base of keys in block */
- xfs_inobt_rec_t *krbase=NULL;/* base of records in block */
- int low; /* low entry number */
-
- /*
- * Get a pointer to keys or records.
- */
- if (level > 0)
- kkbase = XFS_INOBT_KEY_ADDR(block, 1, cur);
- else
- krbase = XFS_INOBT_REC_ADDR(block, 1, cur);
- /*
- * Set low and high entry numbers, 1-based.
- */
- low = 1;
- if (!(high = be16_to_cpu(block->bb_numrecs))) {
- /*
- * If the block is empty, the tree must
- * be an empty leaf.
- */
- ASSERT(level == 0 && cur->bc_nlevels == 1);
- cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE;
- *stat = 0;
- return 0;
- }
- /*
- * Binary search the block.
- */
- while (low <= high) {
- xfs_agino_t startino; /* key value */
-
- /*
- * keyno is average of low and high.
- */
- keyno = (low + high) >> 1;
- /*
- * Get startino.
- */
- if (level > 0) {
- xfs_inobt_key_t *kkp;
-
- kkp = kkbase + keyno - 1;
- startino = be32_to_cpu(kkp->ir_startino);
- } else {
- xfs_inobt_rec_t *krp;
-
- krp = krbase + keyno - 1;
- startino = be32_to_cpu(krp->ir_startino);
- }
- /*
- * Compute difference to get next direction.
- */
- diff = (__int64_t)
- startino - cur->bc_rec.i.ir_startino;
- /*
- * Less than, move right.
- */
- if (diff < 0)
- low = keyno + 1;
- /*
- * Greater than, move left.
- */
- else if (diff > 0)
- high = keyno - 1;
- /*
- * Equal, we're done.
- */
- else
- break;
- }
- }
- /*
- * If there are more levels, set up for the next level
- * by getting the block number and filling in the cursor.
- */
- if (level > 0) {
- /*
- * If we moved left, need the previous key number,
- * unless there isn't one.
- */
- if (diff > 0 && --keyno < 1)
- keyno = 1;
- agbno = be32_to_cpu(*XFS_INOBT_PTR_ADDR(block, keyno, cur));
-#ifdef DEBUG
- if ((error = xfs_btree_check_sptr(cur, agbno, level)))
- return error;
-#endif
- cur->bc_ptrs[level] = keyno;
- }
- }
- /*
- * Done with the search.
- * See if we need to adjust the results.
- */
- if (dir != XFS_LOOKUP_LE && diff < 0) {
- keyno++;
- /*
- * If ge search and we went off the end of the block, but it's
- * not the last block, we're in the wrong block.
- */
- if (dir == XFS_LOOKUP_GE &&
- keyno > be16_to_cpu(block->bb_numrecs) &&
- be32_to_cpu(block->bb_rightsib) != NULLAGBLOCK) {
- int i;
-
- cur->bc_ptrs[0] = keyno;
- if ((error = xfs_inobt_increment(cur, 0, &i)))
- return error;
- ASSERT(i == 1);
- *stat = 1;
- return 0;
- }
- }
- else if (dir == XFS_LOOKUP_LE && diff > 0)
- keyno--;
- cur->bc_ptrs[0] = keyno;
- /*
- * Return if we succeeded or not.
- */
- if (keyno == 0 || keyno > be16_to_cpu(block->bb_numrecs))
- *stat = 0;
- else
- *stat = ((dir != XFS_LOOKUP_EQ) || (diff == 0));
- return 0;
-}
-
/*
* Move 1 record left from cur/level if possible.
* Update cur to reflect the new path.
/*
* Update the parent key values of right.
*/
- if ((error = xfs_inobt_updkey(cur, rkp, level + 1)))
+ if ((error = xfs_btree_updkey(cur, (union xfs_btree_key *)rkp, level + 1)))
return error;
/*
* Slide the cursor value left one.
return 0;
}
-/*
- * Move 1 record right from cur/level if possible.
- * Update cur to reflect the new path.
- */
-STATIC int /* error */
-xfs_inobt_rshift(
- xfs_btree_cur_t *cur, /* btree cursor */
- int level, /* level to shift record on */
- int *stat) /* success/failure */
-{
- int error; /* error return value */
- int i; /* loop index */
- xfs_inobt_key_t key; /* key value for leaf level upward */
- xfs_buf_t *lbp; /* buffer for left (current) block */
- xfs_inobt_block_t *left; /* left (current) btree block */
- xfs_inobt_key_t *lkp; /* key pointer for left block */
- xfs_inobt_ptr_t *lpp; /* address pointer for left block */
- xfs_inobt_rec_t *lrp; /* record pointer for left block */
- xfs_buf_t *rbp; /* buffer for right neighbor block */
- xfs_inobt_block_t *right; /* right neighbor btree block */
- xfs_inobt_key_t *rkp; /* key pointer for right block */
- xfs_inobt_ptr_t *rpp; /* address pointer for right block */
- xfs_inobt_rec_t *rrp=NULL; /* record pointer for right block */
- xfs_btree_cur_t *tcur; /* temporary cursor */
-
- /*
- * Set up variables for this block as "left".
- */
- lbp = cur->bc_bufs[level];
- left = XFS_BUF_TO_INOBT_BLOCK(lbp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, left, level, lbp)))
- return error;
-#endif
- /*
- * If we've got no right sibling then we can't shift an entry right.
- */
- if (be32_to_cpu(left->bb_rightsib) == NULLAGBLOCK) {
- *stat = 0;
- return 0;
- }
- /*
- * If the cursor entry is the one that would be moved, don't
- * do it... it's too complicated.
- */
- if (cur->bc_ptrs[level] >= be16_to_cpu(left->bb_numrecs)) {
- *stat = 0;
- return 0;
- }
- /*
- * Set up the right neighbor as "right".
- */
- if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp,
- cur->bc_private.a.agno, be32_to_cpu(left->bb_rightsib),
- 0, &rbp, XFS_INO_BTREE_REF)))
- return error;
- right = XFS_BUF_TO_INOBT_BLOCK(rbp);
- if ((error = xfs_btree_check_sblock(cur, right, level, rbp)))
- return error;
- /*
- * If it's full, it can't take another entry.
- */
- if (be16_to_cpu(right->bb_numrecs) == XFS_INOBT_BLOCK_MAXRECS(level, cur)) {
- *stat = 0;
- return 0;
- }
- /*
- * Make a hole at the start of the right neighbor block, then
- * copy the last left block entry to the hole.
- */
- if (level > 0) {
- lkp = XFS_INOBT_KEY_ADDR(left, be16_to_cpu(left->bb_numrecs), cur);
- lpp = XFS_INOBT_PTR_ADDR(left, be16_to_cpu(left->bb_numrecs), cur);
- rkp = XFS_INOBT_KEY_ADDR(right, 1, cur);
- rpp = XFS_INOBT_PTR_ADDR(right, 1, cur);
-#ifdef DEBUG
- for (i = be16_to_cpu(right->bb_numrecs) - 1; i >= 0; i--) {
- if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(rpp[i]), level)))
- return error;
- }
-#endif
- memmove(rkp + 1, rkp, be16_to_cpu(right->bb_numrecs) * sizeof(*rkp));
- memmove(rpp + 1, rpp, be16_to_cpu(right->bb_numrecs) * sizeof(*rpp));
-#ifdef DEBUG
- if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(*lpp), level)))
- return error;
-#endif
- *rkp = *lkp;
- *rpp = *lpp;
- xfs_inobt_log_keys(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
- xfs_inobt_log_ptrs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
- } else {
- lrp = XFS_INOBT_REC_ADDR(left, be16_to_cpu(left->bb_numrecs), cur);
- rrp = XFS_INOBT_REC_ADDR(right, 1, cur);
- memmove(rrp + 1, rrp, be16_to_cpu(right->bb_numrecs) * sizeof(*rrp));
- *rrp = *lrp;
- xfs_inobt_log_recs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
- key.ir_startino = rrp->ir_startino;
- rkp = &key;
- }
- /*
- * Decrement and log left's numrecs, bump and log right's numrecs.
- */
- be16_add_cpu(&left->bb_numrecs, -1);
- xfs_inobt_log_block(cur->bc_tp, lbp, XFS_BB_NUMRECS);
- be16_add_cpu(&right->bb_numrecs, 1);
-#ifdef DEBUG
- if (level > 0)
- xfs_btree_check_key(cur->bc_btnum, rkp, rkp + 1);
- else
- xfs_btree_check_rec(cur->bc_btnum, rrp, rrp + 1);
-#endif
- xfs_inobt_log_block(cur->bc_tp, rbp, XFS_BB_NUMRECS);
- /*
- * Using a temporary cursor, update the parent key values of the
- * block on the right.
- */
- if ((error = xfs_btree_dup_cursor(cur, &tcur)))
- return error;
- xfs_btree_lastrec(tcur, level);
- if ((error = xfs_inobt_increment(tcur, level, &i)) ||
- (error = xfs_inobt_updkey(tcur, rkp, level + 1))) {
- xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
- return error;
- }
- xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
- *stat = 1;
- return 0;
-}
-
/*
* Split cur/level block in half.
* Return new block number and its first record (to be inserted into parent).
return 0;
}
-/*
- * Update keys at all levels from here to the root along the cursor's path.
- */
-STATIC int /* error */
-xfs_inobt_updkey(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_inobt_key_t *keyp, /* new key value to update to */
- int level) /* starting level for update */
-{
- int ptr; /* index of key in block */
-
- /*
- * Go up the tree from this level toward the root.
- * At each level, update the key value to the value input.
- * Stop when we reach a level where the cursor isn't pointing
- * at the first entry in the block.
- */
- for (ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
- xfs_buf_t *bp; /* buffer for block */
- xfs_inobt_block_t *block; /* btree block */
-#ifdef DEBUG
- int error; /* error return value */
-#endif
- xfs_inobt_key_t *kp; /* ptr to btree block keys */
-
- bp = cur->bc_bufs[level];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, level, bp)))
- return error;
-#endif
- ptr = cur->bc_ptrs[level];
- kp = XFS_INOBT_KEY_ADDR(block, ptr, cur);
- *kp = *keyp;
- xfs_inobt_log_keys(cur, bp, ptr, ptr);
- }
- return 0;
-}
-
/*
* Externally visible routines.
*/
-/*
- * Decrement cursor by one record at the level.
- * For nonzero levels the leaf-ward information is untouched.
- */
-int /* error */
-xfs_inobt_decrement(
- xfs_btree_cur_t *cur, /* btree cursor */
- int level, /* level in btree, 0 is leaf */
- int *stat) /* success/failure */
-{
- xfs_inobt_block_t *block; /* btree block */
- int error;
- int lev; /* btree level */
-
- ASSERT(level < cur->bc_nlevels);
- /*
- * Read-ahead to the left at this level.
- */
- xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA);
- /*
- * Decrement the ptr at this level. If we're still in the block
- * then we're done.
- */
- if (--cur->bc_ptrs[level] > 0) {
- *stat = 1;
- return 0;
- }
- /*
- * Get a pointer to the btree block.
- */
- block = XFS_BUF_TO_INOBT_BLOCK(cur->bc_bufs[level]);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, level,
- cur->bc_bufs[level])))
- return error;
-#endif
- /*
- * If we just went off the left edge of the tree, return failure.
- */
- if (be32_to_cpu(block->bb_leftsib) == NULLAGBLOCK) {
- *stat = 0;
- return 0;
- }
- /*
- * March up the tree decrementing pointers.
- * 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)
- break;
- /*
- * Read-ahead the left block, we're going to read it
- * in the next loop.
- */
- xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA);
- }
- /*
- * If we went off the root then we are seriously confused.
- */
- ASSERT(lev < cur->bc_nlevels);
- /*
- * Now walk back down the tree, fixing up the cursor's buffer
- * pointers and key numbers.
- */
- for (block = XFS_BUF_TO_INOBT_BLOCK(cur->bc_bufs[lev]); lev > level; ) {
- xfs_agblock_t agbno; /* block number of btree block */
- xfs_buf_t *bp; /* buffer containing btree block */
-
- agbno = be32_to_cpu(*XFS_INOBT_PTR_ADDR(block, cur->bc_ptrs[lev], cur));
- if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp,
- cur->bc_private.a.agno, agbno, 0, &bp,
- XFS_INO_BTREE_REF)))
- return error;
- lev--;
- xfs_btree_setbuf(cur, lev, bp);
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- if ((error = xfs_btree_check_sblock(cur, block, lev, bp)))
- return error;
- cur->bc_ptrs[lev] = be16_to_cpu(block->bb_numrecs);
- }
- *stat = 1;
- return 0;
-}
-
/*
* Delete the record pointed to by cur.
* The cursor refers to the place where the record was (could be inserted)
if (i == 0) {
for (level = 1; level < cur->bc_nlevels; level++) {
if (cur->bc_ptrs[level] == 0) {
- if ((error = xfs_inobt_decrement(cur, level, &i)))
+ if ((error = xfs_btree_decrement(cur, level, &i)))
return error;
break;
}
return 0;
}
-/*
- * Increment cursor by one record at the level.
- * For nonzero levels the leaf-ward information is untouched.
- */
-int /* error */
-xfs_inobt_increment(
- xfs_btree_cur_t *cur, /* btree cursor */
- int level, /* level in btree, 0 is leaf */
- int *stat) /* success/failure */
-{
- xfs_inobt_block_t *block; /* btree block */
- xfs_buf_t *bp; /* buffer containing btree block */
- int error; /* error return value */
- int lev; /* btree level */
-
- ASSERT(level < cur->bc_nlevels);
- /*
- * Read-ahead to the right at this level.
- */
- xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA);
- /*
- * Get a pointer to the btree block.
- */
- bp = cur->bc_bufs[level];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, level, bp)))
- return error;
-#endif
- /*
- * Increment the ptr at this level. If we're still in the block
- * then we're done.
- */
- if (++cur->bc_ptrs[level] <= be16_to_cpu(block->bb_numrecs)) {
- *stat = 1;
- return 0;
- }
- /*
- * If we just went off the right edge of the tree, return failure.
- */
- if (be32_to_cpu(block->bb_rightsib) == NULLAGBLOCK) {
- *stat = 0;
- return 0;
- }
- /*
- * March up the tree incrementing pointers.
- * Stop when we don't go off the right edge of a block.
- */
- for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
- bp = cur->bc_bufs[lev];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, lev, bp)))
- return error;
-#endif
- if (++cur->bc_ptrs[lev] <= be16_to_cpu(block->bb_numrecs))
- break;
- /*
- * Read-ahead the right block, we're going to read it
- * in the next loop.
- */
- xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA);
- }
- /*
- * If we went off the root then we are seriously confused.
- */
- ASSERT(lev < cur->bc_nlevels);
- /*
- * Now walk back down the tree, fixing up the cursor's buffer
- * pointers and key numbers.
- */
- for (bp = cur->bc_bufs[lev], block = XFS_BUF_TO_INOBT_BLOCK(bp);
- lev > level; ) {
- xfs_agblock_t agbno; /* block number of btree block */
-
- agbno = be32_to_cpu(*XFS_INOBT_PTR_ADDR(block, cur->bc_ptrs[lev], cur));
- if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp,
- cur->bc_private.a.agno, agbno, 0, &bp,
- XFS_INO_BTREE_REF)))
- return error;
- lev--;
- xfs_btree_setbuf(cur, lev, bp);
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- if ((error = xfs_btree_check_sblock(cur, block, lev, bp)))
- return error;
- cur->bc_ptrs[lev] = 1;
- }
- *stat = 1;
- return 0;
-}
-
/*
* Insert the current record at the point referenced by cur.
* The cursor may be inconsistent on return if splits have been done.
return 0;
}
-/*
- * Lookup the record equal to ino in the btree given by cur.
- */
-int /* error */
-xfs_inobt_lookup_eq(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_agino_t ino, /* starting inode of chunk */
- __int32_t fcnt, /* free inode count */
- xfs_inofree_t free, /* free inode mask */
- int *stat) /* success/failure */
+STATIC struct xfs_btree_cur *
+xfs_inobt_dup_cursor(
+ struct xfs_btree_cur *cur)
{
- cur->bc_rec.i.ir_startino = ino;
- cur->bc_rec.i.ir_freecount = fcnt;
- cur->bc_rec.i.ir_free = free;
- return xfs_inobt_lookup(cur, XFS_LOOKUP_EQ, stat);
+ return xfs_inobt_init_cursor(cur->bc_mp, cur->bc_tp,
+ cur->bc_private.a.agbp, cur->bc_private.a.agno);
}
-/*
- * Lookup the first record greater than or equal to ino
- * in the btree given by cur.
- */
-int /* error */
-xfs_inobt_lookup_ge(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_agino_t ino, /* starting inode of chunk */
- __int32_t fcnt, /* free inode count */
- xfs_inofree_t free, /* free inode mask */
- int *stat) /* success/failure */
+STATIC int
+xfs_inobt_get_maxrecs(
+ struct xfs_btree_cur *cur,
+ int level)
{
- cur->bc_rec.i.ir_startino = ino;
- cur->bc_rec.i.ir_freecount = fcnt;
- cur->bc_rec.i.ir_free = free;
- return xfs_inobt_lookup(cur, XFS_LOOKUP_GE, stat);
+ return cur->bc_mp->m_inobt_mxr[level != 0];
+}
+
+STATIC void
+xfs_inobt_init_key_from_rec(
+ union xfs_btree_key *key,
+ union xfs_btree_rec *rec)
+{
+ key->inobt.ir_startino = rec->inobt.ir_startino;
}
/*
- * Lookup the first record less than or equal to ino
- * in the btree given by cur.
+ * intial value of ptr for lookup
*/
-int /* error */
-xfs_inobt_lookup_le(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_agino_t ino, /* starting inode of chunk */
- __int32_t fcnt, /* free inode count */
- xfs_inofree_t free, /* free inode mask */
- int *stat) /* success/failure */
+STATIC void
+xfs_inobt_init_ptr_from_cur(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_ptr *ptr)
{
- cur->bc_rec.i.ir_startino = ino;
- cur->bc_rec.i.ir_freecount = fcnt;
- cur->bc_rec.i.ir_free = free;
- return xfs_inobt_lookup(cur, XFS_LOOKUP_LE, stat);
+ struct xfs_agi *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp);
+
+ ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno));
+
+ ptr->s = agi->agi_root;
}
+STATIC __int64_t
+xfs_inobt_key_diff(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_key *key)
+{
+ return (__int64_t)be32_to_cpu(key->inobt.ir_startino) -
+ cur->bc_rec.i.ir_startino;
+}
+
+#ifdef XFS_BTREE_TRACE
+ktrace_t *xfs_inobt_trace_buf;
+
+STATIC void
+xfs_inobt_trace_enter(
+ struct xfs_btree_cur *cur,
+ const char *func,
+ char *s,
+ int type,
+ int line,
+ __psunsigned_t a0,
+ __psunsigned_t a1,
+ __psunsigned_t a2,
+ __psunsigned_t a3,
+ __psunsigned_t a4,
+ __psunsigned_t a5,
+ __psunsigned_t a6,
+ __psunsigned_t a7,
+ __psunsigned_t a8,
+ __psunsigned_t a9,
+ __psunsigned_t a10)
+{
+ ktrace_enter(xfs_inobt_trace_buf, (void *)(__psint_t)type,
+ (void *)func, (void *)s, NULL, (void *)cur,
+ (void *)a0, (void *)a1, (void *)a2, (void *)a3,
+ (void *)a4, (void *)a5, (void *)a6, (void *)a7,
+ (void *)a8, (void *)a9, (void *)a10);
+}
+
+STATIC void
+xfs_inobt_trace_cursor(
+ struct xfs_btree_cur *cur,
+ __uint32_t *s0,
+ __uint64_t *l0,
+ __uint64_t *l1)
+{
+ *s0 = cur->bc_private.a.agno;
+ *l0 = cur->bc_rec.i.ir_startino;
+ *l1 = cur->bc_rec.i.ir_free;
+}
+
+STATIC void
+xfs_inobt_trace_key(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_key *key,
+ __uint64_t *l0,
+ __uint64_t *l1)
+{
+ *l0 = be32_to_cpu(key->inobt.ir_startino);
+ *l1 = 0;
+}
+
+STATIC void
+xfs_inobt_trace_record(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_rec *rec,
+ __uint64_t *l0,
+ __uint64_t *l1,
+ __uint64_t *l2)
+{
+ *l0 = be32_to_cpu(rec->inobt.ir_startino);
+ *l1 = be32_to_cpu(rec->inobt.ir_freecount);
+ *l2 = be64_to_cpu(rec->inobt.ir_free);
+}
+#endif /* XFS_BTREE_TRACE */
+
+static const struct xfs_btree_ops xfs_inobt_ops = {
+ .rec_len = sizeof(xfs_inobt_rec_t),
+ .key_len = sizeof(xfs_inobt_key_t),
+
+ .dup_cursor = xfs_inobt_dup_cursor,
+ .get_maxrecs = xfs_inobt_get_maxrecs,
+ .init_key_from_rec = xfs_inobt_init_key_from_rec,
+ .init_ptr_from_cur = xfs_inobt_init_ptr_from_cur,
+ .key_diff = xfs_inobt_key_diff,
+
+#ifdef XFS_BTREE_TRACE
+ .trace_enter = xfs_inobt_trace_enter,
+ .trace_cursor = xfs_inobt_trace_cursor,
+ .trace_key = xfs_inobt_trace_key,
+ .trace_record = xfs_inobt_trace_record,
+#endif
+};
+
/*
- * Update the record referred to by cur, to the value given
- * by [ino, fcnt, free].
- * This either works (return 0) or gets an EFSCORRUPTED error.
+ * Allocate a new inode btree cursor.
*/
-int /* error */
-xfs_inobt_update(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_agino_t ino, /* starting inode of chunk */
- __int32_t fcnt, /* free inode count */
- xfs_inofree_t free) /* free inode mask */
+struct xfs_btree_cur * /* new inode btree cursor */
+xfs_inobt_init_cursor(
+ struct xfs_mount *mp, /* file system mount point */
+ struct xfs_trans *tp, /* transaction pointer */
+ struct xfs_buf *agbp, /* buffer for agi structure */
+ xfs_agnumber_t agno) /* allocation group number */
{
- xfs_inobt_block_t *block; /* btree block to update */
- xfs_buf_t *bp; /* buffer containing btree block */
- int error; /* error return value */
- int ptr; /* current record number (updating) */
- xfs_inobt_rec_t *rp; /* pointer to updated record */
+ struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp);
+ struct xfs_btree_cur *cur;
- /*
- * Pick up the current block.
- */
- bp = cur->bc_bufs[0];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, 0, bp)))
- return error;
-#endif
- /*
- * Get the address of the rec to be updated.
- */
- ptr = cur->bc_ptrs[0];
- rp = XFS_INOBT_REC_ADDR(block, ptr, cur);
- /*
- * Fill in the new contents and log them.
- */
- rp->ir_startino = cpu_to_be32(ino);
- rp->ir_freecount = cpu_to_be32(fcnt);
- rp->ir_free = cpu_to_be64(free);
- xfs_inobt_log_recs(cur, bp, ptr, ptr);
- /*
- * Updating first record in leaf. Pass new key value up to our parent.
- */
- if (ptr == 1) {
- xfs_inobt_key_t key; /* key containing [ino] */
+ cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
- key.ir_startino = cpu_to_be32(ino);
- if ((error = xfs_inobt_updkey(cur, &key, 1)))
- return error;
- }
- return 0;
+ cur->bc_tp = tp;
+ cur->bc_mp = mp;
+ cur->bc_nlevels = be32_to_cpu(agi->agi_level);
+ cur->bc_btnum = XFS_BTNUM_INO;
+ cur->bc_blocklog = mp->m_sb.sb_blocklog;
+
+ cur->bc_ops = &xfs_inobt_ops;
+
+ cur->bc_private.a.agbp = agbp;
+ cur->bc_private.a.agno = agno;
+
+ return cur;
}
projects / linux-2.6-omap-h63xx.git / blobdiff