mirror of
https://github.com/torvalds/linux.git
synced 2024-11-11 14:42:24 +00:00
9da096fd13
Signed-off-by: Malcolm Parsons <malcolm.parsons@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
384 lines
8.6 KiB
C
384 lines
8.6 KiB
C
/*
|
|
* 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_inum.h"
|
|
#include "xfs_trans.h"
|
|
#include "xfs_sb.h"
|
|
#include "xfs_ag.h"
|
|
#include "xfs_dir2.h"
|
|
#include "xfs_dmapi.h"
|
|
#include "xfs_mount.h"
|
|
#include "xfs_bmap_btree.h"
|
|
#include "xfs_alloc_btree.h"
|
|
#include "xfs_ialloc_btree.h"
|
|
#include "xfs_dir2_sf.h"
|
|
#include "xfs_attr_sf.h"
|
|
#include "xfs_dinode.h"
|
|
#include "xfs_inode.h"
|
|
#include "xfs_btree.h"
|
|
#include "xfs_btree_trace.h"
|
|
#include "xfs_ialloc.h"
|
|
#include "xfs_alloc.h"
|
|
#include "xfs_error.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_kill_root(
|
|
struct xfs_btree_cur *cur,
|
|
struct xfs_buf *bp,
|
|
int level,
|
|
union xfs_btree_ptr *newroot)
|
|
{
|
|
int error;
|
|
|
|
XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY);
|
|
XFS_BTREE_STATS_INC(cur, killroot);
|
|
|
|
/*
|
|
* Update the root pointer, decreasing the level by 1 and then
|
|
* free the old root.
|
|
*/
|
|
xfs_inobt_set_root(cur, newroot, -1);
|
|
error = xfs_inobt_free_block(cur, bp);
|
|
if (error) {
|
|
XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR);
|
|
return error;
|
|
}
|
|
|
|
XFS_BTREE_STATS_INC(cur, free);
|
|
|
|
cur->bc_bufs[level] = NULL;
|
|
cur->bc_nlevels--;
|
|
|
|
XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
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 */
|
|
|
|
#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,
|
|
.set_root = xfs_inobt_set_root,
|
|
.kill_root = xfs_inobt_kill_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,
|
|
|
|
#ifdef DEBUG
|
|
.keys_inorder = xfs_inobt_keys_inorder,
|
|
.recs_inorder = xfs_inobt_recs_inorder,
|
|
#endif
|
|
|
|
#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
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/*
|
|
* 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));
|
|
}
|