2005-04-17 00:20:36 +02:00
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/*
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2005-11-02 04:58:39 +01:00
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* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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2005-04-17 00:20:36 +02:00
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*
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2005-11-02 04:58:39 +01:00
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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2005-04-17 00:20:36 +02:00
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* published by the Free Software Foundation.
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*
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2005-11-02 04:58:39 +01:00
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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2005-04-17 00:20:36 +02:00
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*
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2005-11-02 04:58:39 +01:00
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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2005-04-17 00:20:36 +02:00
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*/
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#include "xfs.h"
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2005-11-02 04:38:42 +01:00
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#include "xfs_fs.h"
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2005-04-17 00:20:36 +02:00
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#include "xfs_types.h"
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2005-11-02 04:38:42 +01:00
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#include "xfs_bit.h"
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2005-04-17 00:20:36 +02:00
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#include "xfs_log.h"
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2005-11-02 04:38:42 +01:00
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#include "xfs_inum.h"
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2005-04-17 00:20:36 +02:00
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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2005-11-02 04:38:42 +01:00
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#include "xfs_dir2.h"
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2005-04-17 00:20:36 +02:00
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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2005-11-02 04:38:42 +01:00
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#include "xfs_alloc_btree.h"
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2005-04-17 00:20:36 +02:00
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#include "xfs_ialloc_btree.h"
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2005-11-02 04:38:42 +01:00
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#include "xfs_dir2_sf.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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2005-04-17 00:20:36 +02:00
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#include "xfs_btree.h"
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2008-10-30 06:57:03 +01:00
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#include "xfs_btree_trace.h"
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2005-04-17 00:20:36 +02:00
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#include "xfs_ialloc.h"
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#include "xfs_alloc.h"
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#include "xfs_error.h"
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STATIC void xfs_inobt_log_block(xfs_trans_t *, xfs_buf_t *, int);
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STATIC void xfs_inobt_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int);
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STATIC void xfs_inobt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int);
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STATIC void xfs_inobt_log_recs(xfs_btree_cur_t *, xfs_buf_t *, int, int);
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/*
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* Single level of the xfs_inobt_delete record deletion routine.
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* Delete record pointed to by cur/level.
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* Remove the record from its block then rebalance the tree.
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* Return 0 for error, 1 for done, 2 to go on to the next level.
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*/
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STATIC int /* error */
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xfs_inobt_delrec(
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xfs_btree_cur_t *cur, /* btree cursor */
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int level, /* level removing record from */
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int *stat) /* fail/done/go-on */
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{
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xfs_buf_t *agbp; /* buffer for a.g. inode header */
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xfs_mount_t *mp; /* mount structure */
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xfs_agi_t *agi; /* allocation group inode header */
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xfs_inobt_block_t *block; /* btree block record/key lives in */
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xfs_agblock_t bno; /* btree block number */
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xfs_buf_t *bp; /* buffer for block */
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int error; /* error return value */
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int i; /* loop index */
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xfs_inobt_key_t key; /* kp points here if block is level 0 */
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xfs_inobt_key_t *kp = NULL; /* pointer to btree keys */
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xfs_agblock_t lbno; /* left block's block number */
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xfs_buf_t *lbp; /* left block's buffer pointer */
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xfs_inobt_block_t *left; /* left btree block */
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xfs_inobt_key_t *lkp; /* left block key pointer */
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xfs_inobt_ptr_t *lpp; /* left block address pointer */
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int lrecs = 0; /* number of records in left block */
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xfs_inobt_rec_t *lrp; /* left block record pointer */
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xfs_inobt_ptr_t *pp = NULL; /* pointer to btree addresses */
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int ptr; /* index in btree block for this rec */
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xfs_agblock_t rbno; /* right block's block number */
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xfs_buf_t *rbp; /* right block's buffer pointer */
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xfs_inobt_block_t *right; /* right btree block */
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xfs_inobt_key_t *rkp; /* right block key pointer */
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xfs_inobt_rec_t *rp; /* pointer to btree records */
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xfs_inobt_ptr_t *rpp; /* right block address pointer */
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int rrecs = 0; /* number of records in right block */
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int numrecs;
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xfs_inobt_rec_t *rrp; /* right block record pointer */
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xfs_btree_cur_t *tcur; /* temporary btree cursor */
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mp = cur->bc_mp;
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/*
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* Get the index of the entry being deleted, check for nothing there.
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*/
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ptr = cur->bc_ptrs[level];
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if (ptr == 0) {
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*stat = 0;
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return 0;
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}
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/*
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* Get the buffer & block containing the record or key/ptr.
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*/
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bp = cur->bc_bufs[level];
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block = XFS_BUF_TO_INOBT_BLOCK(bp);
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#ifdef DEBUG
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if ((error = xfs_btree_check_sblock(cur, block, level, bp)))
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return error;
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#endif
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/*
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* Fail if we're off the end of the block.
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*/
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2005-11-02 05:11:25 +01:00
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numrecs = be16_to_cpu(block->bb_numrecs);
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2005-04-17 00:20:36 +02:00
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if (ptr > numrecs) {
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*stat = 0;
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return 0;
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}
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/*
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* It's a nonleaf. Excise the key and ptr being deleted, by
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* sliding the entries past them down one.
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* Log the changed areas of the block.
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*/
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if (level > 0) {
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kp = XFS_INOBT_KEY_ADDR(block, 1, cur);
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pp = XFS_INOBT_PTR_ADDR(block, 1, cur);
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#ifdef DEBUG
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for (i = ptr; i < numrecs; i++) {
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2005-11-02 05:11:25 +01:00
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if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(pp[i]), level)))
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2005-04-17 00:20:36 +02:00
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return error;
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}
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#endif
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if (ptr < numrecs) {
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memmove(&kp[ptr - 1], &kp[ptr],
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(numrecs - ptr) * sizeof(*kp));
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memmove(&pp[ptr - 1], &pp[ptr],
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(numrecs - ptr) * sizeof(*kp));
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xfs_inobt_log_keys(cur, bp, ptr, numrecs - 1);
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xfs_inobt_log_ptrs(cur, bp, ptr, numrecs - 1);
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}
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}
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/*
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* It's a leaf. Excise the record being deleted, by sliding the
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* entries past it down one. Log the changed areas of the block.
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*/
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else {
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rp = XFS_INOBT_REC_ADDR(block, 1, cur);
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if (ptr < numrecs) {
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memmove(&rp[ptr - 1], &rp[ptr],
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(numrecs - ptr) * sizeof(*rp));
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xfs_inobt_log_recs(cur, bp, ptr, numrecs - 1);
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}
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/*
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* If it's the first record in the block, we'll need a key
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* structure to pass up to the next level (updkey).
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*/
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if (ptr == 1) {
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key.ir_startino = rp->ir_startino;
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kp = &key;
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}
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}
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/*
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* Decrement and log the number of entries in the block.
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*/
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numrecs--;
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2005-11-02 05:11:25 +01:00
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block->bb_numrecs = cpu_to_be16(numrecs);
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2005-04-17 00:20:36 +02:00
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xfs_inobt_log_block(cur->bc_tp, bp, XFS_BB_NUMRECS);
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/*
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* Is this the root level? If so, we're almost done.
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*/
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if (level == cur->bc_nlevels - 1) {
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/*
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* If this is the root level,
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* and there's only one entry left,
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* and it's NOT the leaf level,
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* then we can get rid of this level.
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*/
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if (numrecs == 1 && level > 0) {
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2008-08-13 08:25:27 +02:00
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agbp = cur->bc_private.a.agbp;
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2005-04-17 00:20:36 +02:00
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agi = XFS_BUF_TO_AGI(agbp);
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/*
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* pp is still set to the first pointer in the block.
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* Make it the new root of the btree.
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*/
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2005-11-02 05:11:25 +01:00
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bno = be32_to_cpu(agi->agi_root);
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2005-04-17 00:20:36 +02:00
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agi->agi_root = *pp;
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2008-02-14 00:03:29 +01:00
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be32_add_cpu(&agi->agi_level, -1);
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2005-04-17 00:20:36 +02:00
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/*
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* Free the block.
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*/
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if ((error = xfs_free_extent(cur->bc_tp,
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2008-08-13 08:25:27 +02:00
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XFS_AGB_TO_FSB(mp, cur->bc_private.a.agno, bno), 1)))
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2005-04-17 00:20:36 +02:00
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return error;
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xfs_trans_binval(cur->bc_tp, bp);
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xfs_ialloc_log_agi(cur->bc_tp, agbp,
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XFS_AGI_ROOT | XFS_AGI_LEVEL);
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/*
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* Update the cursor so there's one fewer level.
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*/
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cur->bc_bufs[level] = NULL;
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cur->bc_nlevels--;
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} else if (level > 0 &&
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2008-10-30 06:55:58 +01:00
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(error = xfs_btree_decrement(cur, level, &i)))
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2005-04-17 00:20:36 +02:00
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return error;
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*stat = 1;
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return 0;
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}
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/*
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* If we deleted the leftmost entry in the block, update the
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* key values above us in the tree.
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*/
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2008-10-30 06:56:22 +01:00
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if (ptr == 1 && (error = xfs_btree_updkey(cur, (union xfs_btree_key *)kp, level + 1)))
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2005-04-17 00:20:36 +02:00
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return error;
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/*
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* If the number of records remaining in the block is at least
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* the minimum, we're done.
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*/
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if (numrecs >= XFS_INOBT_BLOCK_MINRECS(level, cur)) {
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if (level > 0 &&
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2008-10-30 06:55:58 +01:00
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(error = xfs_btree_decrement(cur, level, &i)))
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2005-04-17 00:20:36 +02:00
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return error;
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*stat = 1;
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return 0;
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}
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/*
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* Otherwise, we have to move some records around to keep the
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* tree balanced. Look at the left and right sibling blocks to
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* see if we can re-balance by moving only one record.
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*/
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2005-11-02 05:11:25 +01:00
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rbno = be32_to_cpu(block->bb_rightsib);
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lbno = be32_to_cpu(block->bb_leftsib);
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2005-04-17 00:20:36 +02:00
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bno = NULLAGBLOCK;
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ASSERT(rbno != NULLAGBLOCK || lbno != NULLAGBLOCK);
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/*
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* Duplicate the cursor so our btree manipulations here won't
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* disrupt the next level up.
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*/
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if ((error = xfs_btree_dup_cursor(cur, &tcur)))
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return error;
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/*
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* If there's a right sibling, see if it's ok to shift an entry
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* out of it.
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*/
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if (rbno != NULLAGBLOCK) {
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/*
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* Move the temp cursor to the last entry in the next block.
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* Actually any entry but the first would suffice.
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*/
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i = xfs_btree_lastrec(tcur, level);
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XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
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2008-10-30 06:55:45 +01:00
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if ((error = xfs_btree_increment(tcur, level, &i)))
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2005-04-17 00:20:36 +02:00
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goto error0;
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XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
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i = xfs_btree_lastrec(tcur, level);
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XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
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/*
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* Grab a pointer to the block.
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*/
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rbp = tcur->bc_bufs[level];
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right = XFS_BUF_TO_INOBT_BLOCK(rbp);
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#ifdef DEBUG
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if ((error = xfs_btree_check_sblock(cur, right, level, rbp)))
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goto error0;
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#endif
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/*
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* Grab the current block number, for future use.
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*/
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2005-11-02 05:11:25 +01:00
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bno = be32_to_cpu(right->bb_leftsib);
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2005-04-17 00:20:36 +02:00
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/*
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* If right block is full enough so that removing one entry
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* won't make it too empty, and left-shifting an entry out
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* of right to us works, we're done.
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*/
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2005-11-02 05:11:25 +01:00
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if (be16_to_cpu(right->bb_numrecs) - 1 >=
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2005-04-17 00:20:36 +02:00
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XFS_INOBT_BLOCK_MINRECS(level, cur)) {
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2008-10-30 06:56:53 +01:00
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if ((error = xfs_btree_lshift(tcur, level, &i)))
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2005-04-17 00:20:36 +02:00
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goto error0;
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if (i) {
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2005-11-02 05:11:25 +01:00
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ASSERT(be16_to_cpu(block->bb_numrecs) >=
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2005-04-17 00:20:36 +02:00
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XFS_INOBT_BLOCK_MINRECS(level, cur));
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xfs_btree_del_cursor(tcur,
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XFS_BTREE_NOERROR);
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if (level > 0 &&
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2008-10-30 06:55:58 +01:00
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(error = xfs_btree_decrement(cur, level,
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2005-04-17 00:20:36 +02:00
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&i)))
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return error;
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*stat = 1;
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return 0;
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}
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}
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/*
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* Otherwise, grab the number of records in right for
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* future reference, and fix up the temp cursor to point
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* to our block again (last record).
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*/
|
2005-11-02 05:11:25 +01:00
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rrecs = be16_to_cpu(right->bb_numrecs);
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2005-04-17 00:20:36 +02:00
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if (lbno != NULLAGBLOCK) {
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xfs_btree_firstrec(tcur, level);
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2008-10-30 06:55:58 +01:00
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if ((error = xfs_btree_decrement(tcur, level, &i)))
|
2005-04-17 00:20:36 +02:00
|
|
|
goto error0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* If there's a left sibling, see if it's ok to shift an entry
|
|
|
|
* out of it.
|
|
|
|
*/
|
|
|
|
if (lbno != NULLAGBLOCK) {
|
|
|
|
/*
|
|
|
|
* Move the temp cursor to the first entry in the
|
|
|
|
* previous block.
|
|
|
|
*/
|
|
|
|
xfs_btree_firstrec(tcur, level);
|
2008-10-30 06:55:58 +01:00
|
|
|
if ((error = xfs_btree_decrement(tcur, level, &i)))
|
2005-04-17 00:20:36 +02:00
|
|
|
goto error0;
|
|
|
|
xfs_btree_firstrec(tcur, level);
|
|
|
|
/*
|
|
|
|
* Grab a pointer to the block.
|
|
|
|
*/
|
|
|
|
lbp = tcur->bc_bufs[level];
|
|
|
|
left = XFS_BUF_TO_INOBT_BLOCK(lbp);
|
|
|
|
#ifdef DEBUG
|
|
|
|
if ((error = xfs_btree_check_sblock(cur, left, level, lbp)))
|
|
|
|
goto error0;
|
|
|
|
#endif
|
|
|
|
/*
|
|
|
|
* Grab the current block number, for future use.
|
|
|
|
*/
|
2005-11-02 05:11:25 +01:00
|
|
|
bno = be32_to_cpu(left->bb_rightsib);
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* If left block is full enough so that removing one entry
|
|
|
|
* won't make it too empty, and right-shifting an entry out
|
|
|
|
* of left to us works, we're done.
|
|
|
|
*/
|
2005-11-02 05:11:25 +01:00
|
|
|
if (be16_to_cpu(left->bb_numrecs) - 1 >=
|
2005-04-17 00:20:36 +02:00
|
|
|
XFS_INOBT_BLOCK_MINRECS(level, cur)) {
|
2008-10-30 06:56:43 +01:00
|
|
|
if ((error = xfs_btree_rshift(tcur, level, &i)))
|
2005-04-17 00:20:36 +02:00
|
|
|
goto error0;
|
|
|
|
if (i) {
|
2005-11-02 05:11:25 +01:00
|
|
|
ASSERT(be16_to_cpu(block->bb_numrecs) >=
|
2005-04-17 00:20:36 +02:00
|
|
|
XFS_INOBT_BLOCK_MINRECS(level, cur));
|
|
|
|
xfs_btree_del_cursor(tcur,
|
|
|
|
XFS_BTREE_NOERROR);
|
|
|
|
if (level == 0)
|
|
|
|
cur->bc_ptrs[0]++;
|
|
|
|
*stat = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Otherwise, grab the number of records in right for
|
|
|
|
* future reference.
|
|
|
|
*/
|
2005-11-02 05:11:25 +01:00
|
|
|
lrecs = be16_to_cpu(left->bb_numrecs);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Delete the temp cursor, we're done with it.
|
|
|
|
*/
|
|
|
|
xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
|
|
|
|
/*
|
|
|
|
* If here, we need to do a join to keep the tree balanced.
|
|
|
|
*/
|
|
|
|
ASSERT(bno != NULLAGBLOCK);
|
|
|
|
/*
|
|
|
|
* See if we can join with the left neighbor block.
|
|
|
|
*/
|
|
|
|
if (lbno != NULLAGBLOCK &&
|
|
|
|
lrecs + numrecs <= XFS_INOBT_BLOCK_MAXRECS(level, cur)) {
|
|
|
|
/*
|
|
|
|
* Set "right" to be the starting block,
|
|
|
|
* "left" to be the left neighbor.
|
|
|
|
*/
|
|
|
|
rbno = bno;
|
|
|
|
right = block;
|
2005-11-02 05:11:25 +01:00
|
|
|
rrecs = be16_to_cpu(right->bb_numrecs);
|
2005-04-17 00:20:36 +02:00
|
|
|
rbp = bp;
|
|
|
|
if ((error = xfs_btree_read_bufs(mp, cur->bc_tp,
|
2008-08-13 08:25:27 +02:00
|
|
|
cur->bc_private.a.agno, lbno, 0, &lbp,
|
2005-04-17 00:20:36 +02:00
|
|
|
XFS_INO_BTREE_REF)))
|
|
|
|
return error;
|
|
|
|
left = XFS_BUF_TO_INOBT_BLOCK(lbp);
|
2005-11-02 05:11:25 +01:00
|
|
|
lrecs = be16_to_cpu(left->bb_numrecs);
|
2005-04-17 00:20:36 +02:00
|
|
|
if ((error = xfs_btree_check_sblock(cur, left, level, lbp)))
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* If that won't work, see if we can join with the right neighbor block.
|
|
|
|
*/
|
|
|
|
else if (rbno != NULLAGBLOCK &&
|
|
|
|
rrecs + numrecs <= XFS_INOBT_BLOCK_MAXRECS(level, cur)) {
|
|
|
|
/*
|
|
|
|
* Set "left" to be the starting block,
|
|
|
|
* "right" to be the right neighbor.
|
|
|
|
*/
|
|
|
|
lbno = bno;
|
|
|
|
left = block;
|
2005-11-02 05:11:25 +01:00
|
|
|
lrecs = be16_to_cpu(left->bb_numrecs);
|
2005-04-17 00:20:36 +02:00
|
|
|
lbp = bp;
|
|
|
|
if ((error = xfs_btree_read_bufs(mp, cur->bc_tp,
|
2008-08-13 08:25:27 +02:00
|
|
|
cur->bc_private.a.agno, rbno, 0, &rbp,
|
2005-04-17 00:20:36 +02:00
|
|
|
XFS_INO_BTREE_REF)))
|
|
|
|
return error;
|
|
|
|
right = XFS_BUF_TO_INOBT_BLOCK(rbp);
|
2005-11-02 05:11:25 +01:00
|
|
|
rrecs = be16_to_cpu(right->bb_numrecs);
|
2005-04-17 00:20:36 +02:00
|
|
|
if ((error = xfs_btree_check_sblock(cur, right, level, rbp)))
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Otherwise, we can't fix the imbalance.
|
|
|
|
* Just return. This is probably a logic error, but it's not fatal.
|
|
|
|
*/
|
|
|
|
else {
|
2008-10-30 06:55:58 +01:00
|
|
|
if (level > 0 && (error = xfs_btree_decrement(cur, level, &i)))
|
2005-04-17 00:20:36 +02:00
|
|
|
return error;
|
|
|
|
*stat = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* We're now going to join "left" and "right" by moving all the stuff
|
|
|
|
* in "right" to "left" and deleting "right".
|
|
|
|
*/
|
|
|
|
if (level > 0) {
|
|
|
|
/*
|
|
|
|
* It's a non-leaf. Move keys and pointers.
|
|
|
|
*/
|
|
|
|
lkp = XFS_INOBT_KEY_ADDR(left, lrecs + 1, cur);
|
|
|
|
lpp = XFS_INOBT_PTR_ADDR(left, lrecs + 1, cur);
|
|
|
|
rkp = XFS_INOBT_KEY_ADDR(right, 1, cur);
|
|
|
|
rpp = XFS_INOBT_PTR_ADDR(right, 1, cur);
|
|
|
|
#ifdef DEBUG
|
|
|
|
for (i = 0; i < rrecs; i++) {
|
2005-11-02 05:11:25 +01:00
|
|
|
if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(rpp[i]), level)))
|
2005-04-17 00:20:36 +02:00
|
|
|
return error;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
memcpy(lkp, rkp, rrecs * sizeof(*lkp));
|
|
|
|
memcpy(lpp, rpp, rrecs * sizeof(*lpp));
|
|
|
|
xfs_inobt_log_keys(cur, lbp, lrecs + 1, lrecs + rrecs);
|
|
|
|
xfs_inobt_log_ptrs(cur, lbp, lrecs + 1, lrecs + rrecs);
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* It's a leaf. Move records.
|
|
|
|
*/
|
|
|
|
lrp = XFS_INOBT_REC_ADDR(left, lrecs + 1, cur);
|
|
|
|
rrp = XFS_INOBT_REC_ADDR(right, 1, cur);
|
|
|
|
memcpy(lrp, rrp, rrecs * sizeof(*lrp));
|
|
|
|
xfs_inobt_log_recs(cur, lbp, lrecs + 1, lrecs + rrecs);
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* If we joined with the left neighbor, set the buffer in the
|
|
|
|
* cursor to the left block, and fix up the index.
|
|
|
|
*/
|
|
|
|
if (bp != lbp) {
|
|
|
|
xfs_btree_setbuf(cur, level, lbp);
|
|
|
|
cur->bc_ptrs[level] += lrecs;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* If we joined with the right neighbor and there's a level above
|
|
|
|
* us, increment the cursor at that level.
|
|
|
|
*/
|
|
|
|
else if (level + 1 < cur->bc_nlevels &&
|
2008-10-30 06:55:45 +01:00
|
|
|
(error = xfs_btree_increment(cur, level + 1, &i)))
|
2005-04-17 00:20:36 +02:00
|
|
|
return error;
|
|
|
|
/*
|
|
|
|
* Fix up the number of records in the surviving block.
|
|
|
|
*/
|
|
|
|
lrecs += rrecs;
|
2005-11-02 05:11:25 +01:00
|
|
|
left->bb_numrecs = cpu_to_be16(lrecs);
|
2005-04-17 00:20:36 +02:00
|
|
|
/*
|
|
|
|
* Fix up the right block pointer in the surviving block, and log it.
|
|
|
|
*/
|
|
|
|
left->bb_rightsib = right->bb_rightsib;
|
|
|
|
xfs_inobt_log_block(cur->bc_tp, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
|
|
|
|
/*
|
|
|
|
* If there is a right sibling now, make it point to the
|
|
|
|
* remaining block.
|
|
|
|
*/
|
2005-11-02 05:11:25 +01:00
|
|
|
if (be32_to_cpu(left->bb_rightsib) != NULLAGBLOCK) {
|
2005-04-17 00:20:36 +02:00
|
|
|
xfs_inobt_block_t *rrblock;
|
|
|
|
xfs_buf_t *rrbp;
|
|
|
|
|
|
|
|
if ((error = xfs_btree_read_bufs(mp, cur->bc_tp,
|
2008-08-13 08:25:27 +02:00
|
|
|
cur->bc_private.a.agno, be32_to_cpu(left->bb_rightsib), 0,
|
2005-04-17 00:20:36 +02:00
|
|
|
&rrbp, XFS_INO_BTREE_REF)))
|
|
|
|
return error;
|
|
|
|
rrblock = XFS_BUF_TO_INOBT_BLOCK(rrbp);
|
|
|
|
if ((error = xfs_btree_check_sblock(cur, rrblock, level, rrbp)))
|
|
|
|
return error;
|
2005-11-02 05:11:25 +01:00
|
|
|
rrblock->bb_leftsib = cpu_to_be32(lbno);
|
2005-04-17 00:20:36 +02:00
|
|
|
xfs_inobt_log_block(cur->bc_tp, rrbp, XFS_BB_LEFTSIB);
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Free the deleting block.
|
|
|
|
*/
|
|
|
|
if ((error = xfs_free_extent(cur->bc_tp, XFS_AGB_TO_FSB(mp,
|
2008-08-13 08:25:27 +02:00
|
|
|
cur->bc_private.a.agno, rbno), 1)))
|
2005-04-17 00:20:36 +02:00
|
|
|
return error;
|
|
|
|
xfs_trans_binval(cur->bc_tp, rbp);
|
|
|
|
/*
|
|
|
|
* Readjust the ptr at this level if it's not a leaf, since it's
|
|
|
|
* still pointing at the deletion point, which makes the cursor
|
|
|
|
* inconsistent. If this makes the ptr 0, the caller fixes it up.
|
|
|
|
* We can't use decrement because it would change the next level up.
|
|
|
|
*/
|
|
|
|
if (level > 0)
|
|
|
|
cur->bc_ptrs[level]--;
|
|
|
|
/*
|
|
|
|
* Return value means the next level up has something to do.
|
|
|
|
*/
|
|
|
|
*stat = 2;
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error0:
|
|
|
|
xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Log header fields from a btree block.
|
|
|
|
*/
|
|
|
|
STATIC void
|
|
|
|
xfs_inobt_log_block(
|
|
|
|
xfs_trans_t *tp, /* transaction pointer */
|
|
|
|
xfs_buf_t *bp, /* buffer containing btree block */
|
|
|
|
int fields) /* mask of fields: XFS_BB_... */
|
|
|
|
{
|
|
|
|
int first; /* first byte offset logged */
|
|
|
|
int last; /* last byte offset logged */
|
|
|
|
static const short offsets[] = { /* table of offsets */
|
|
|
|
offsetof(xfs_inobt_block_t, bb_magic),
|
|
|
|
offsetof(xfs_inobt_block_t, bb_level),
|
|
|
|
offsetof(xfs_inobt_block_t, bb_numrecs),
|
|
|
|
offsetof(xfs_inobt_block_t, bb_leftsib),
|
|
|
|
offsetof(xfs_inobt_block_t, bb_rightsib),
|
|
|
|
sizeof(xfs_inobt_block_t)
|
|
|
|
};
|
|
|
|
|
|
|
|
xfs_btree_offsets(fields, offsets, XFS_BB_NUM_BITS, &first, &last);
|
|
|
|
xfs_trans_log_buf(tp, bp, first, last);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Log keys from a btree block (nonleaf).
|
|
|
|
*/
|
|
|
|
STATIC void
|
|
|
|
xfs_inobt_log_keys(
|
|
|
|
xfs_btree_cur_t *cur, /* btree cursor */
|
|
|
|
xfs_buf_t *bp, /* buffer containing btree block */
|
|
|
|
int kfirst, /* index of first key to log */
|
|
|
|
int klast) /* index of last key to log */
|
|
|
|
{
|
|
|
|
xfs_inobt_block_t *block; /* btree block to log from */
|
|
|
|
int first; /* first byte offset logged */
|
|
|
|
xfs_inobt_key_t *kp; /* key pointer in btree block */
|
|
|
|
int last; /* last byte offset logged */
|
|
|
|
|
|
|
|
block = XFS_BUF_TO_INOBT_BLOCK(bp);
|
|
|
|
kp = XFS_INOBT_KEY_ADDR(block, 1, cur);
|
|
|
|
first = (int)((xfs_caddr_t)&kp[kfirst - 1] - (xfs_caddr_t)block);
|
|
|
|
last = (int)(((xfs_caddr_t)&kp[klast] - 1) - (xfs_caddr_t)block);
|
|
|
|
xfs_trans_log_buf(cur->bc_tp, bp, first, last);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Log block pointer fields from a btree block (nonleaf).
|
|
|
|
*/
|
|
|
|
STATIC void
|
|
|
|
xfs_inobt_log_ptrs(
|
|
|
|
xfs_btree_cur_t *cur, /* btree cursor */
|
|
|
|
xfs_buf_t *bp, /* buffer containing btree block */
|
|
|
|
int pfirst, /* index of first pointer to log */
|
|
|
|
int plast) /* index of last pointer to log */
|
|
|
|
{
|
|
|
|
xfs_inobt_block_t *block; /* btree block to log from */
|
|
|
|
int first; /* first byte offset logged */
|
|
|
|
int last; /* last byte offset logged */
|
|
|
|
xfs_inobt_ptr_t *pp; /* block-pointer pointer in btree blk */
|
|
|
|
|
|
|
|
block = XFS_BUF_TO_INOBT_BLOCK(bp);
|
|
|
|
pp = XFS_INOBT_PTR_ADDR(block, 1, cur);
|
|
|
|
first = (int)((xfs_caddr_t)&pp[pfirst - 1] - (xfs_caddr_t)block);
|
|
|
|
last = (int)(((xfs_caddr_t)&pp[plast] - 1) - (xfs_caddr_t)block);
|
|
|
|
xfs_trans_log_buf(cur->bc_tp, bp, first, last);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Log records from a btree block (leaf).
|
|
|
|
*/
|
|
|
|
STATIC void
|
|
|
|
xfs_inobt_log_recs(
|
|
|
|
xfs_btree_cur_t *cur, /* btree cursor */
|
|
|
|
xfs_buf_t *bp, /* buffer containing btree block */
|
|
|
|
int rfirst, /* index of first record to log */
|
|
|
|
int rlast) /* index of last record to log */
|
|
|
|
{
|
|
|
|
xfs_inobt_block_t *block; /* btree block to log from */
|
|
|
|
int first; /* first byte offset logged */
|
|
|
|
int last; /* last byte offset logged */
|
|
|
|
xfs_inobt_rec_t *rp; /* record pointer for btree block */
|
|
|
|
|
|
|
|
block = XFS_BUF_TO_INOBT_BLOCK(bp);
|
|
|
|
rp = XFS_INOBT_REC_ADDR(block, 1, cur);
|
|
|
|
first = (int)((xfs_caddr_t)&rp[rfirst - 1] - (xfs_caddr_t)block);
|
|
|
|
last = (int)(((xfs_caddr_t)&rp[rlast] - 1) - (xfs_caddr_t)block);
|
|
|
|
xfs_trans_log_buf(cur->bc_tp, bp, first, last);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Externally visible routines.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Delete the record pointed to by cur.
|
|
|
|
* The cursor refers to the place where the record was (could be inserted)
|
|
|
|
* when the operation returns.
|
|
|
|
*/
|
|
|
|
int /* error */
|
|
|
|
xfs_inobt_delete(
|
|
|
|
xfs_btree_cur_t *cur, /* btree cursor */
|
|
|
|
int *stat) /* success/failure */
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
int i; /* result code */
|
|
|
|
int level; /* btree level */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Go up the tree, starting at leaf level.
|
|
|
|
* If 2 is returned then a join was done; go to the next level.
|
|
|
|
* Otherwise we are done.
|
|
|
|
*/
|
|
|
|
for (level = 0, i = 2; i == 2; level++) {
|
|
|
|
if ((error = xfs_inobt_delrec(cur, level, &i)))
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
if (i == 0) {
|
|
|
|
for (level = 1; level < cur->bc_nlevels; level++) {
|
|
|
|
if (cur->bc_ptrs[level] == 0) {
|
2008-10-30 06:55:58 +01:00
|
|
|
if ((error = xfs_btree_decrement(cur, level, &i)))
|
2005-04-17 00:20:36 +02:00
|
|
|
return error;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
*stat = i;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get the data from the pointed-to record.
|
|
|
|
*/
|
|
|
|
int /* error */
|
|
|
|
xfs_inobt_get_rec(
|
|
|
|
xfs_btree_cur_t *cur, /* btree cursor */
|
|
|
|
xfs_agino_t *ino, /* output: starting inode of chunk */
|
|
|
|
__int32_t *fcnt, /* output: number of free inodes */
|
|
|
|
xfs_inofree_t *free, /* output: free inode mask */
|
|
|
|
int *stat) /* output: success/failure */
|
|
|
|
{
|
|
|
|
xfs_inobt_block_t *block; /* btree block */
|
|
|
|
xfs_buf_t *bp; /* buffer containing btree block */
|
|
|
|
#ifdef DEBUG
|
|
|
|
int error; /* error return value */
|
|
|
|
#endif
|
|
|
|
int ptr; /* record number */
|
|
|
|
xfs_inobt_rec_t *rec; /* record data */
|
|
|
|
|
|
|
|
bp = cur->bc_bufs[0];
|
|
|
|
ptr = cur->bc_ptrs[0];
|
|
|
|
block = XFS_BUF_TO_INOBT_BLOCK(bp);
|
|
|
|
#ifdef DEBUG
|
|
|
|
if ((error = xfs_btree_check_sblock(cur, block, 0, bp)))
|
|
|
|
return error;
|
|
|
|
#endif
|
|
|
|
/*
|
|
|
|
* Off the right end or left end, return failure.
|
|
|
|
*/
|
2005-11-02 05:11:25 +01:00
|
|
|
if (ptr > be16_to_cpu(block->bb_numrecs) || ptr <= 0) {
|
2005-04-17 00:20:36 +02:00
|
|
|
*stat = 0;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Point to the record and extract its data.
|
|
|
|
*/
|
|
|
|
rec = XFS_INOBT_REC_ADDR(block, ptr, cur);
|
2006-09-28 02:57:04 +02:00
|
|
|
*ino = be32_to_cpu(rec->ir_startino);
|
|
|
|
*fcnt = be32_to_cpu(rec->ir_freecount);
|
|
|
|
*free = be64_to_cpu(rec->ir_free);
|
2005-04-17 00:20:36 +02:00
|
|
|
*stat = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-10-30 06:53:59 +01:00
|
|
|
STATIC struct xfs_btree_cur *
|
|
|
|
xfs_inobt_dup_cursor(
|
|
|
|
struct xfs_btree_cur *cur)
|
|
|
|
{
|
|
|
|
return xfs_inobt_init_cursor(cur->bc_mp, cur->bc_tp,
|
|
|
|
cur->bc_private.a.agbp, cur->bc_private.a.agno);
|
|
|
|
}
|
|
|
|
|
2008-10-30 06:57:16 +01:00
|
|
|
STATIC void
|
|
|
|
xfs_inobt_set_root(
|
|
|
|
struct xfs_btree_cur *cur,
|
|
|
|
union xfs_btree_ptr *nptr,
|
|
|
|
int inc) /* level change */
|
|
|
|
{
|
|
|
|
struct xfs_buf *agbp = cur->bc_private.a.agbp;
|
|
|
|
struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp);
|
|
|
|
|
|
|
|
agi->agi_root = nptr->s;
|
|
|
|
be32_add_cpu(&agi->agi_level, inc);
|
|
|
|
xfs_ialloc_log_agi(cur->bc_tp, agbp, XFS_AGI_ROOT | XFS_AGI_LEVEL);
|
|
|
|
}
|
|
|
|
|
2008-10-30 06:57:03 +01:00
|
|
|
STATIC int
|
|
|
|
xfs_inobt_alloc_block(
|
|
|
|
struct xfs_btree_cur *cur,
|
|
|
|
union xfs_btree_ptr *start,
|
|
|
|
union xfs_btree_ptr *new,
|
|
|
|
int length,
|
|
|
|
int *stat)
|
|
|
|
{
|
|
|
|
xfs_alloc_arg_t args; /* block allocation args */
|
|
|
|
int error; /* error return value */
|
|
|
|
xfs_agblock_t sbno = be32_to_cpu(start->s);
|
|
|
|
|
|
|
|
XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY);
|
|
|
|
|
|
|
|
memset(&args, 0, sizeof(args));
|
|
|
|
args.tp = cur->bc_tp;
|
|
|
|
args.mp = cur->bc_mp;
|
|
|
|
args.fsbno = XFS_AGB_TO_FSB(args.mp, cur->bc_private.a.agno, sbno);
|
|
|
|
args.minlen = 1;
|
|
|
|
args.maxlen = 1;
|
|
|
|
args.prod = 1;
|
|
|
|
args.type = XFS_ALLOCTYPE_NEAR_BNO;
|
|
|
|
|
|
|
|
error = xfs_alloc_vextent(&args);
|
|
|
|
if (error) {
|
|
|
|
XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
if (args.fsbno == NULLFSBLOCK) {
|
|
|
|
XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
|
|
|
|
*stat = 0;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
ASSERT(args.len == 1);
|
|
|
|
XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
|
|
|
|
|
|
|
|
new->s = cpu_to_be32(XFS_FSB_TO_AGBNO(args.mp, args.fsbno));
|
|
|
|
*stat = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-10-30 06:57:51 +01:00
|
|
|
STATIC int
|
|
|
|
xfs_inobt_free_block(
|
|
|
|
struct xfs_btree_cur *cur,
|
|
|
|
struct xfs_buf *bp)
|
|
|
|
{
|
|
|
|
xfs_fsblock_t fsbno;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
fsbno = XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(bp));
|
|
|
|
error = xfs_free_extent(cur->bc_tp, fsbno, 1);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
xfs_trans_binval(cur->bc_tp, bp);
|
|
|
|
return error;
|
|
|
|
}
|
2008-10-30 06:57:03 +01:00
|
|
|
|
2008-10-30 06:55:23 +01:00
|
|
|
STATIC int
|
|
|
|
xfs_inobt_get_maxrecs(
|
|
|
|
struct xfs_btree_cur *cur,
|
|
|
|
int level)
|
|
|
|
{
|
|
|
|
return cur->bc_mp->m_inobt_mxr[level != 0];
|
|
|
|
}
|
|
|
|
|
2008-10-30 06:56:09 +01:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2008-10-30 06:57:40 +01:00
|
|
|
STATIC void
|
|
|
|
xfs_inobt_init_rec_from_key(
|
|
|
|
union xfs_btree_key *key,
|
|
|
|
union xfs_btree_rec *rec)
|
|
|
|
{
|
|
|
|
rec->inobt.ir_startino = key->inobt.ir_startino;
|
|
|
|
}
|
|
|
|
|
|
|
|
STATIC void
|
|
|
|
xfs_inobt_init_rec_from_cur(
|
|
|
|
struct xfs_btree_cur *cur,
|
|
|
|
union xfs_btree_rec *rec)
|
|
|
|
{
|
|
|
|
rec->inobt.ir_startino = cpu_to_be32(cur->bc_rec.i.ir_startino);
|
|
|
|
rec->inobt.ir_freecount = cpu_to_be32(cur->bc_rec.i.ir_freecount);
|
|
|
|
rec->inobt.ir_free = cpu_to_be64(cur->bc_rec.i.ir_free);
|
|
|
|
}
|
|
|
|
|
2008-10-30 06:56:09 +01:00
|
|
|
/*
|
|
|
|
* intial value of ptr for lookup
|
|
|
|
*/
|
|
|
|
STATIC void
|
|
|
|
xfs_inobt_init_ptr_from_cur(
|
|
|
|
struct xfs_btree_cur *cur,
|
|
|
|
union xfs_btree_ptr *ptr)
|
|
|
|
{
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2008-10-30 06:55:13 +01:00
|
|
|
#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 */
|
|
|
|
|
2008-10-30 06:53:59 +01:00
|
|
|
static const struct xfs_btree_ops xfs_inobt_ops = {
|
2008-10-30 06:55:34 +01:00
|
|
|
.rec_len = sizeof(xfs_inobt_rec_t),
|
|
|
|
.key_len = sizeof(xfs_inobt_key_t),
|
|
|
|
|
2008-10-30 06:53:59 +01:00
|
|
|
.dup_cursor = xfs_inobt_dup_cursor,
|
2008-10-30 06:57:16 +01:00
|
|
|
.set_root = xfs_inobt_set_root,
|
2008-10-30 06:57:03 +01:00
|
|
|
.alloc_block = xfs_inobt_alloc_block,
|
2008-10-30 06:57:51 +01:00
|
|
|
.free_block = xfs_inobt_free_block,
|
2008-10-30 06:55:23 +01:00
|
|
|
.get_maxrecs = xfs_inobt_get_maxrecs,
|
2008-10-30 06:56:09 +01:00
|
|
|
.init_key_from_rec = xfs_inobt_init_key_from_rec,
|
2008-10-30 06:57:40 +01:00
|
|
|
.init_rec_from_key = xfs_inobt_init_rec_from_key,
|
|
|
|
.init_rec_from_cur = xfs_inobt_init_rec_from_cur,
|
2008-10-30 06:56:09 +01:00
|
|
|
.init_ptr_from_cur = xfs_inobt_init_ptr_from_cur,
|
|
|
|
.key_diff = xfs_inobt_key_diff,
|
2008-10-30 06:55:13 +01:00
|
|
|
|
|
|
|
#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
|
2008-10-30 06:53:59 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocate a new inode btree cursor.
|
|
|
|
*/
|
|
|
|
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 */
|
|
|
|
{
|
|
|
|
struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp);
|
|
|
|
struct xfs_btree_cur *cur;
|
|
|
|
|
|
|
|
cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|