/*
* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_types.h"
#include "xfs_bit.h"
#include "xfs_log.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_mount.h"
#include "xfs_bmap_btree.h"
#include "xfs_alloc_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_btree.h"
#include "xfs_ialloc.h"
#include "xfs_alloc.h"
#include "xfs_error.h"
#include "xfs_trace.h"
#include "xfs_cksum.h"
STATIC int
xfs_inobt_get_minrecs(
struct xfs_btree_cur *cur,
int level)
{
return cur->bc_mp->m_inobt_mnr[level != 0];
}
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);
}
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);
}
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;
}
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;
}
STATIC int
xfs_inobt_get_maxrecs(
struct xfs_btree_cur *cur,
int level)
{
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;
}
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);
}
/*
* initial 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;
}
static int
xfs_inobt_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
struct xfs_perag *pag = bp->b_pag;
unsigned int level;
/*
* During growfs operations, we can't verify the exact owner as the
* perag is not fully initialised and hence not attached to the buffer.
*
* Similarly, during log recovery we will have a perag structure
* attached, but the agi information will not yet have been initialised
* from the on disk AGI. We don't currently use any of this information,
* but beware of the landmine (i.e. need to check pag->pagi_init) if we
* ever do.
*/
switch (block->bb_magic) {
case cpu_to_be32(XFS_IBT_CRC_MAGIC):
if (!xfs_sb_version_hascrc(&mp->m_sb))
return false;
if (!uuid_equal(&block->bb_u.s.bb_uuid, &mp->m_sb.sb_uuid))
return false;
if (block->bb_u.s.bb_blkno != cpu_to_be64(bp->b_bn))
return false;
if (pag &&
be32_to_cpu(block->bb_u.s.bb_owner) != pag->pag_agno)
return false;
/* fall through */
case cpu_to_be32(XFS_IBT_MAGIC):
break;
default:
return 0;
}
/* numrecs and level verification */
level = be16_to_cpu(block->bb_level);
if (level >= mp->m_in_maxlevels)
return false;
if (be16_to_cpu(block->bb_numrecs) > mp->m_inobt_mxr[level != 0])
return false;
/* sibling pointer verification */
if (!block->bb_u.s.bb_leftsib ||
(be32_to_cpu(block->bb_u.s.bb_leftsib) >= mp->m_sb.sb_agblocks &&
block->bb_u.s.bb_leftsib != cpu_to_be32(NULLAGBLOCK)))
return false;
if (!block->bb_u.s.bb_rightsib ||
(be32_to_cpu(block->bb_u.s.bb_rightsib) >= mp->m_sb.sb_agblocks &&
block->bb_u.s.bb_rightsib != cpu_to_be32(NULLAGBLOCK)))
return false;
return true;
}
static void
xfs_inobt_read_verify(
struct xfs_buf *bp)
{
if (!(xfs_btree_sblock_verify_crc(bp) &&
xfs_inobt_verify(bp))) {
trace_xfs_btree_corrupt(bp, _RET_IP_);
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
bp->b_target->bt_mount, bp->b_addr);
xfs_buf_ioerror(bp, EFSCORRUPTED);
}
}
static void
xfs_inobt_write_verify(
struct xfs_buf *bp)
{
if (!xfs_inobt_verify(bp)) {
trace_xfs_btree_corrupt(bp, _RET_IP_);
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
bp->b_target->bt_mount, bp->b_addr);
xfs_buf_ioerror(bp, EFSCORRUPTED);
}
xfs_btree_sblock_calc_crc(bp);
}
const struct xfs_buf_ops xfs_inobt_buf_ops = {
.verify_read = xfs_inobt_read_verify,
.verify_write = xfs_inobt_write_verify,
};
#if defined(DEBUG) || defined(XFS_WARN)
STATIC int
xfs_inobt_keys_inorder(
struct xfs_btree_cur *cur,
union xfs_btree_key *k1,
union xfs_btree_key *k2)
{
return be32_to_cpu(k1->inobt.ir_startino) <
be32_to_cpu(k2->inobt.ir_startino);
}
STATIC int
xfs_inobt_recs_inorder(
struct xfs_btree_cur *cur,
union xfs_btree_rec *r1,
union xfs_btree_rec *r2)
{
return be32_to_cpu(r1->inobt.ir_startino) + XFS_INODES_PER_CHUNK <=
be32_to_cpu(r2->inobt.ir_startino);
}
#endif /* DEBUG */
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,
.set_root = xfs_inobt_set_root,
.alloc_block = xfs_inobt_alloc_block,
.free_block = xfs_inobt_free_block,
.get_minrecs = xfs_inobt_get_minrecs,
.get_maxrecs = xfs_inobt_get_maxrecs,
.init_key_from_rec = xfs_inobt_init_key_from_rec,
.init_rec_from_key = xfs_inobt_init_rec_from_key,
.init_rec_from_cur = xfs_inobt_init_rec_from_cur,
.init_ptr_from_cur = xfs_inobt_init_ptr_from_cur,
.key_diff = xfs_inobt_key_diff,
.buf_ops = &xfs_inobt_buf_ops,
#if defined(DEBUG) || defined(XFS_WARN)
.keys_inorder = xfs_inobt_keys_inorder,
.recs_inorder = xfs_inobt_recs_inorder,
#endif
};
/*
* 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;
if (xfs_sb_version_hascrc(&mp->m_sb))
cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
cur->bc_private.a.agbp = agbp;
cur->bc_private.a.agno = agno;
return cur;
}
/*
* Calculate number of records in an inobt btree block.
*/
int
xfs_inobt_maxrecs(
struct xfs_mount *mp,
int blocklen,
int leaf)
{
blocklen -= XFS_INOBT_BLOCK_LEN(mp);
if (leaf)
return blocklen / sizeof(xfs_inobt_rec_t);
return blocklen / (sizeof(xfs_inobt_key_t) + sizeof(xfs_inobt_ptr_t));
}
