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kernel-fxtec-pro1x/fs/xfs/xfs_bmap_btree.c
Yingping Lu d210a28cd8 [XFS] In actual allocation of file system blocks and freeing extents, the 
transaction within each such operation may involve multiple locking of AGF
buffer. While the freeing extent function has sorted the extents based on
AGF number before entering into transaction, however, when the file system
space is very limited, the allocation of space would try every AGF to get
space allocated, this could potentially cause out-of-order locking, thus
deadlock could happen. This fix mitigates the scarce space for allocation
by setting aside a few blocks without reservation, and avoid deadlock by
maintaining ascending order of AGF locking.

SGI-PV: 947395
SGI-Modid: xfs-linux-melb:xfs-kern:210801a

Signed-off-by: Yingping Lu <yingping@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 14:55:18 +10:00

2779 lines
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/*
* Copyright (c) 2000-2003,2005 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_dir.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_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_attr_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_inode_item.h"
#include "xfs_alloc.h"
#include "xfs_btree.h"
#include "xfs_ialloc.h"
#include "xfs_itable.h"
#include "xfs_bmap.h"
#include "xfs_error.h"
#include "xfs_quota.h"
#if defined(XFS_BMBT_TRACE)
ktrace_t *xfs_bmbt_trace_buf;
#endif
/*
* Prototypes for internal btree functions.
*/
STATIC int xfs_bmbt_killroot(xfs_btree_cur_t *);
STATIC void xfs_bmbt_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int);
STATIC void xfs_bmbt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int);
STATIC int xfs_bmbt_lshift(xfs_btree_cur_t *, int, int *);
STATIC int xfs_bmbt_rshift(xfs_btree_cur_t *, int, int *);
STATIC int xfs_bmbt_split(xfs_btree_cur_t *, int, xfs_fsblock_t *,
xfs_bmbt_key_t *, xfs_btree_cur_t **, int *);
STATIC int xfs_bmbt_updkey(xfs_btree_cur_t *, xfs_bmbt_key_t *, int);
#if defined(XFS_BMBT_TRACE)
static char ARGS[] = "args";
static char ENTRY[] = "entry";
static char ERROR[] = "error";
#undef EXIT
static char EXIT[] = "exit";
/*
* Add a trace buffer entry for the arguments given to the routine,
* generic form.
*/
STATIC void
xfs_bmbt_trace_enter(
char *func,
xfs_btree_cur_t *cur,
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)
{
xfs_inode_t *ip;
int whichfork;
ip = cur->bc_private.b.ip;
whichfork = cur->bc_private.b.whichfork;
ktrace_enter(xfs_bmbt_trace_buf,
(void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
(void *)func, (void *)s, (void *)ip, (void *)cur,
(void *)a0, (void *)a1, (void *)a2, (void *)a3,
(void *)a4, (void *)a5, (void *)a6, (void *)a7,
(void *)a8, (void *)a9, (void *)a10);
ASSERT(ip->i_btrace);
ktrace_enter(ip->i_btrace,
(void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
(void *)func, (void *)s, (void *)ip, (void *)cur,
(void *)a0, (void *)a1, (void *)a2, (void *)a3,
(void *)a4, (void *)a5, (void *)a6, (void *)a7,
(void *)a8, (void *)a9, (void *)a10);
}
/*
* Add a trace buffer entry for arguments, for a buffer & 1 integer arg.
*/
STATIC void
xfs_bmbt_trace_argbi(
char *func,
xfs_btree_cur_t *cur,
xfs_buf_t *b,
int i,
int line)
{
xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGBI, line,
(__psunsigned_t)b, i, 0, 0,
0, 0, 0, 0,
0, 0, 0);
}
/*
* Add a trace buffer entry for arguments, for a buffer & 2 integer args.
*/
STATIC void
xfs_bmbt_trace_argbii(
char *func,
xfs_btree_cur_t *cur,
xfs_buf_t *b,
int i0,
int i1,
int line)
{
xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGBII, line,
(__psunsigned_t)b, i0, i1, 0,
0, 0, 0, 0,
0, 0, 0);
}
/*
* Add a trace buffer entry for arguments, for 3 block-length args
* and an integer arg.
*/
STATIC void
xfs_bmbt_trace_argfffi(
char *func,
xfs_btree_cur_t *cur,
xfs_dfiloff_t o,
xfs_dfsbno_t b,
xfs_dfilblks_t i,
int j,
int line)
{
xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGFFFI, line,
o >> 32, (int)o, b >> 32, (int)b,
i >> 32, (int)i, (int)j, 0,
0, 0, 0);
}
/*
* Add a trace buffer entry for arguments, for one integer arg.
*/
STATIC void
xfs_bmbt_trace_argi(
char *func,
xfs_btree_cur_t *cur,
int i,
int line)
{
xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGI, line,
i, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0);
}
/*
* Add a trace buffer entry for arguments, for int, fsblock, key.
*/
STATIC void
xfs_bmbt_trace_argifk(
char *func,
xfs_btree_cur_t *cur,
int i,
xfs_fsblock_t f,
xfs_bmbt_key_t *k,
int line)
{
xfs_dfsbno_t d;
xfs_dfiloff_t o;
d = (xfs_dfsbno_t)f;
o = INT_GET(k->br_startoff, ARCH_CONVERT);
xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFK, line,
i, d >> 32, (int)d, o >> 32,
(int)o, 0, 0, 0,
0, 0, 0);
}
/*
* Add a trace buffer entry for arguments, for int, fsblock, rec.
*/
STATIC void
xfs_bmbt_trace_argifr(
char *func,
xfs_btree_cur_t *cur,
int i,
xfs_fsblock_t f,
xfs_bmbt_rec_t *r,
int line)
{
xfs_dfsbno_t b;
xfs_dfilblks_t c;
xfs_dfsbno_t d;
xfs_dfiloff_t o;
xfs_bmbt_irec_t s;
d = (xfs_dfsbno_t)f;
xfs_bmbt_disk_get_all(r, &s);
o = (xfs_dfiloff_t)s.br_startoff;
b = (xfs_dfsbno_t)s.br_startblock;
c = s.br_blockcount;
xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFR, line,
i, d >> 32, (int)d, o >> 32,
(int)o, b >> 32, (int)b, c >> 32,
(int)c, 0, 0);
}
/*
* Add a trace buffer entry for arguments, for int, key.
*/
STATIC void
xfs_bmbt_trace_argik(
char *func,
xfs_btree_cur_t *cur,
int i,
xfs_bmbt_key_t *k,
int line)
{
xfs_dfiloff_t o;
o = INT_GET(k->br_startoff, ARCH_CONVERT);
xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFK, line,
i, o >> 32, (int)o, 0,
0, 0, 0, 0,
0, 0, 0);
}
/*
* Add a trace buffer entry for the cursor/operation.
*/
STATIC void
xfs_bmbt_trace_cursor(
char *func,
xfs_btree_cur_t *cur,
char *s,
int line)
{
xfs_bmbt_rec_t r;
xfs_bmbt_set_all(&r, &cur->bc_rec.b);
xfs_bmbt_trace_enter(func, cur, s, XFS_BMBT_KTRACE_CUR, line,
(cur->bc_nlevels << 24) | (cur->bc_private.b.flags << 16) |
cur->bc_private.b.allocated,
INT_GET(r.l0, ARCH_CONVERT) >> 32, (int)INT_GET(r.l0, ARCH_CONVERT), INT_GET(r.l1, ARCH_CONVERT) >> 32, (int)INT_GET(r.l1, ARCH_CONVERT),
(unsigned long)cur->bc_bufs[0], (unsigned long)cur->bc_bufs[1],
(unsigned long)cur->bc_bufs[2], (unsigned long)cur->bc_bufs[3],
(cur->bc_ptrs[0] << 16) | cur->bc_ptrs[1],
(cur->bc_ptrs[2] << 16) | cur->bc_ptrs[3]);
}
#define XFS_BMBT_TRACE_ARGBI(c,b,i) \
xfs_bmbt_trace_argbi(fname, c, b, i, __LINE__)
#define XFS_BMBT_TRACE_ARGBII(c,b,i,j) \
xfs_bmbt_trace_argbii(fname, c, b, i, j, __LINE__)
#define XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j) \
xfs_bmbt_trace_argfffi(fname, c, o, b, i, j, __LINE__)
#define XFS_BMBT_TRACE_ARGI(c,i) \
xfs_bmbt_trace_argi(fname, c, i, __LINE__)
#define XFS_BMBT_TRACE_ARGIFK(c,i,f,k) \
xfs_bmbt_trace_argifk(fname, c, i, f, k, __LINE__)
#define XFS_BMBT_TRACE_ARGIFR(c,i,f,r) \
xfs_bmbt_trace_argifr(fname, c, i, f, r, __LINE__)
#define XFS_BMBT_TRACE_ARGIK(c,i,k) \
xfs_bmbt_trace_argik(fname, c, i, k, __LINE__)
#define XFS_BMBT_TRACE_CURSOR(c,s) \
xfs_bmbt_trace_cursor(fname, c, s, __LINE__)
#else
#define XFS_BMBT_TRACE_ARGBI(c,b,i)
#define XFS_BMBT_TRACE_ARGBII(c,b,i,j)
#define XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j)
#define XFS_BMBT_TRACE_ARGI(c,i)
#define XFS_BMBT_TRACE_ARGIFK(c,i,f,k)
#define XFS_BMBT_TRACE_ARGIFR(c,i,f,r)
#define XFS_BMBT_TRACE_ARGIK(c,i,k)
#define XFS_BMBT_TRACE_CURSOR(c,s)
#endif /* XFS_BMBT_TRACE */
/*
* Internal functions.
*/
/*
* Delete record pointed to by cur/level.
*/
STATIC int /* error */
xfs_bmbt_delrec(
xfs_btree_cur_t *cur,
int level,
int *stat) /* success/failure */
{
xfs_bmbt_block_t *block; /* bmap btree block */
xfs_fsblock_t bno; /* fs-relative block number */
xfs_buf_t *bp; /* buffer for block */
int error; /* error return value */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_delrec";
#endif
int i; /* loop counter */
int j; /* temp state */
xfs_bmbt_key_t key; /* bmap btree key */
xfs_bmbt_key_t *kp=NULL; /* pointer to bmap btree key */
xfs_fsblock_t lbno; /* left sibling block number */
xfs_buf_t *lbp; /* left buffer pointer */
xfs_bmbt_block_t *left; /* left btree block */
xfs_bmbt_key_t *lkp; /* left btree key */
xfs_bmbt_ptr_t *lpp; /* left address pointer */
int lrecs=0; /* left record count */
xfs_bmbt_rec_t *lrp; /* left record pointer */
xfs_mount_t *mp; /* file system mount point */
xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */
int ptr; /* key/record index */
xfs_fsblock_t rbno; /* right sibling block number */
xfs_buf_t *rbp; /* right buffer pointer */
xfs_bmbt_block_t *right; /* right btree block */
xfs_bmbt_key_t *rkp; /* right btree key */
xfs_bmbt_rec_t *rp; /* pointer to bmap btree rec */
xfs_bmbt_ptr_t *rpp; /* right address pointer */
xfs_bmbt_block_t *rrblock; /* right-right btree block */
xfs_buf_t *rrbp; /* right-right buffer pointer */
int rrecs=0; /* right record count */
xfs_bmbt_rec_t *rrp; /* right record pointer */
xfs_btree_cur_t *tcur; /* temporary btree cursor */
int numrecs; /* temporary numrec count */
int numlrecs, numrrecs;
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGI(cur, level);
ptr = cur->bc_ptrs[level];
tcur = (xfs_btree_cur_t *)0;
if (ptr == 0) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
block = xfs_bmbt_get_block(cur, level, &bp);
numrecs = be16_to_cpu(block->bb_numrecs);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
#endif
if (ptr > numrecs) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
XFS_STATS_INC(xs_bmbt_delrec);
if (level > 0) {
kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
#ifdef DEBUG
for (i = ptr; i < numrecs; i++) {
if ((error = xfs_btree_check_lptr(cur, INT_GET(pp[i], ARCH_CONVERT), level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
}
#endif
if (ptr < numrecs) {
memmove(&kp[ptr - 1], &kp[ptr],
(numrecs - ptr) * sizeof(*kp));
memmove(&pp[ptr - 1], &pp[ptr], /* INT_: direct copy */
(numrecs - ptr) * sizeof(*pp));
xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs - 1);
xfs_bmbt_log_keys(cur, bp, ptr, numrecs - 1);
}
} else {
rp = XFS_BMAP_REC_IADDR(block, 1, cur);
if (ptr < numrecs) {
memmove(&rp[ptr - 1], &rp[ptr],
(numrecs - ptr) * sizeof(*rp));
xfs_bmbt_log_recs(cur, bp, ptr, numrecs - 1);
}
if (ptr == 1) {
INT_SET(key.br_startoff, ARCH_CONVERT, xfs_bmbt_disk_get_startoff(rp));
kp = &key;
}
}
numrecs--;
block->bb_numrecs = cpu_to_be16(numrecs);
xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
/*
* We're at the root level.
* First, shrink the root block in-memory.
* Try to get rid of the next level down.
* If we can't then there's nothing left to do.
*/
if (level == cur->bc_nlevels - 1) {
xfs_iroot_realloc(cur->bc_private.b.ip, -1,
cur->bc_private.b.whichfork);
if ((error = xfs_bmbt_killroot(cur))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
if (ptr == 1 && (error = xfs_bmbt_updkey(cur, kp, level + 1))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
if (numrecs >= XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
rbno = be64_to_cpu(block->bb_rightsib);
lbno = be64_to_cpu(block->bb_leftsib);
/*
* One child of root, need to get a chance to copy its contents
* into the root and delete it. Can't go up to next level,
* there's nothing to delete there.
*/
if (lbno == NULLFSBLOCK && rbno == NULLFSBLOCK &&
level == cur->bc_nlevels - 2) {
if ((error = xfs_bmbt_killroot(cur))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
ASSERT(rbno != NULLFSBLOCK || lbno != NULLFSBLOCK);
if ((error = xfs_btree_dup_cursor(cur, &tcur))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
bno = NULLFSBLOCK;
if (rbno != NULLFSBLOCK) {
i = xfs_btree_lastrec(tcur, level);
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
if ((error = xfs_bmbt_increment(tcur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
i = xfs_btree_lastrec(tcur, level);
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
rbp = tcur->bc_bufs[level];
right = XFS_BUF_TO_BMBT_BLOCK(rbp);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
#endif
bno = be64_to_cpu(right->bb_leftsib);
if (be16_to_cpu(right->bb_numrecs) - 1 >=
XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
if ((error = xfs_bmbt_lshift(tcur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
if (i) {
ASSERT(be16_to_cpu(block->bb_numrecs) >=
XFS_BMAP_BLOCK_IMINRECS(level, tcur));
xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
tcur = NULL;
if (level > 0) {
if ((error = xfs_bmbt_decrement(cur,
level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur,
ERROR);
goto error0;
}
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
}
rrecs = be16_to_cpu(right->bb_numrecs);
if (lbno != NULLFSBLOCK) {
i = xfs_btree_firstrec(tcur, level);
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
if ((error = xfs_bmbt_decrement(tcur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
}
}
if (lbno != NULLFSBLOCK) {
i = xfs_btree_firstrec(tcur, level);
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
/*
* decrement to last in block
*/
if ((error = xfs_bmbt_decrement(tcur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
i = xfs_btree_firstrec(tcur, level);
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
lbp = tcur->bc_bufs[level];
left = XFS_BUF_TO_BMBT_BLOCK(lbp);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
#endif
bno = be64_to_cpu(left->bb_rightsib);
if (be16_to_cpu(left->bb_numrecs) - 1 >=
XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
if ((error = xfs_bmbt_rshift(tcur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
if (i) {
ASSERT(be16_to_cpu(block->bb_numrecs) >=
XFS_BMAP_BLOCK_IMINRECS(level, tcur));
xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
tcur = NULL;
if (level == 0)
cur->bc_ptrs[0]++;
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
}
lrecs = be16_to_cpu(left->bb_numrecs);
}
xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
tcur = NULL;
mp = cur->bc_mp;
ASSERT(bno != NULLFSBLOCK);
if (lbno != NULLFSBLOCK &&
lrecs + be16_to_cpu(block->bb_numrecs) <= XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
rbno = bno;
right = block;
rbp = bp;
if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, lbno, 0, &lbp,
XFS_BMAP_BTREE_REF))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
left = XFS_BUF_TO_BMBT_BLOCK(lbp);
if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
} else if (rbno != NULLFSBLOCK &&
rrecs + be16_to_cpu(block->bb_numrecs) <=
XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
lbno = bno;
left = block;
lbp = bp;
if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, rbno, 0, &rbp,
XFS_BMAP_BTREE_REF))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
right = XFS_BUF_TO_BMBT_BLOCK(rbp);
if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
lrecs = be16_to_cpu(left->bb_numrecs);
} else {
if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
numlrecs = be16_to_cpu(left->bb_numrecs);
numrrecs = be16_to_cpu(right->bb_numrecs);
if (level > 0) {
lkp = XFS_BMAP_KEY_IADDR(left, numlrecs + 1, cur);
lpp = XFS_BMAP_PTR_IADDR(left, numlrecs + 1, cur);
rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
#ifdef DEBUG
for (i = 0; i < numrrecs; i++) {
if ((error = xfs_btree_check_lptr(cur, INT_GET(rpp[i], ARCH_CONVERT), level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
}
#endif
memcpy(lkp, rkp, numrrecs * sizeof(*lkp));
memcpy(lpp, rpp, numrrecs * sizeof(*lpp));
xfs_bmbt_log_keys(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
xfs_bmbt_log_ptrs(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
} else {
lrp = XFS_BMAP_REC_IADDR(left, numlrecs + 1, cur);
rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
memcpy(lrp, rrp, numrrecs * sizeof(*lrp));
xfs_bmbt_log_recs(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
}
be16_add(&left->bb_numrecs, numrrecs);
left->bb_rightsib = right->bb_rightsib;
xfs_bmbt_log_block(cur, lbp, XFS_BB_RIGHTSIB | XFS_BB_NUMRECS);
if (be64_to_cpu(left->bb_rightsib) != NULLDFSBNO) {
if ((error = xfs_btree_read_bufl(mp, cur->bc_tp,
be64_to_cpu(left->bb_rightsib),
0, &rrbp, XFS_BMAP_BTREE_REF))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
rrblock->bb_leftsib = cpu_to_be64(lbno);
xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
}
xfs_bmap_add_free(XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(rbp)), 1,
cur->bc_private.b.flist, mp);
cur->bc_private.b.ip->i_d.di_nblocks--;
xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
XFS_TRANS_MOD_DQUOT_BYINO(mp, cur->bc_tp, cur->bc_private.b.ip,
XFS_TRANS_DQ_BCOUNT, -1L);
xfs_trans_binval(cur->bc_tp, rbp);
if (bp != lbp) {
cur->bc_bufs[level] = lbp;
cur->bc_ptrs[level] += lrecs;
cur->bc_ra[level] = 0;
} else if ((error = xfs_bmbt_increment(cur, level + 1, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
goto error0;
}
if (level > 0)
cur->bc_ptrs[level]--;
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 2;
return 0;
error0:
if (tcur)
xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
return error;
}
#ifdef DEBUG
/*
* Get the data from the pointed-to record.
*/
int
xfs_bmbt_get_rec(
xfs_btree_cur_t *cur,
xfs_fileoff_t *off,
xfs_fsblock_t *bno,
xfs_filblks_t *len,
xfs_exntst_t *state,
int *stat)
{
xfs_bmbt_block_t *block;
xfs_buf_t *bp;
#ifdef DEBUG
int error;
#endif
int ptr;
xfs_bmbt_rec_t *rp;
block = xfs_bmbt_get_block(cur, 0, &bp);
ptr = cur->bc_ptrs[0];
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, block, 0, bp)))
return error;
#endif
if (ptr > be16_to_cpu(block->bb_numrecs) || ptr <= 0) {
*stat = 0;
return 0;
}
rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
*off = xfs_bmbt_disk_get_startoff(rp);
*bno = xfs_bmbt_disk_get_startblock(rp);
*len = xfs_bmbt_disk_get_blockcount(rp);
*state = xfs_bmbt_disk_get_state(rp);
*stat = 1;
return 0;
}
#endif
/*
* Insert one record/level. Return information to the caller
* allowing the next level up to proceed if necessary.
*/
STATIC int /* error */
xfs_bmbt_insrec(
xfs_btree_cur_t *cur,
int level,
xfs_fsblock_t *bnop,
xfs_bmbt_rec_t *recp,
xfs_btree_cur_t **curp,
int *stat) /* no-go/done/continue */
{
xfs_bmbt_block_t *block; /* bmap btree block */
xfs_buf_t *bp; /* buffer for block */
int error; /* error return value */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_insrec";
#endif
int i; /* loop index */
xfs_bmbt_key_t key; /* bmap btree key */
xfs_bmbt_key_t *kp=NULL; /* pointer to bmap btree key */
int logflags; /* inode logging flags */
xfs_fsblock_t nbno; /* new block number */
struct xfs_btree_cur *ncur; /* new btree cursor */
xfs_bmbt_key_t nkey; /* new btree key value */
xfs_bmbt_rec_t nrec; /* new record count */
int optr; /* old key/record index */
xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */
int ptr; /* key/record index */
xfs_bmbt_rec_t *rp=NULL; /* pointer to bmap btree rec */
int numrecs;
ASSERT(level < cur->bc_nlevels);
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGIFR(cur, level, *bnop, recp);
ncur = (xfs_btree_cur_t *)0;
INT_SET(key.br_startoff, ARCH_CONVERT,
xfs_bmbt_disk_get_startoff(recp));
optr = ptr = cur->bc_ptrs[level];
if (ptr == 0) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
XFS_STATS_INC(xs_bmbt_insrec);
block = xfs_bmbt_get_block(cur, level, &bp);
numrecs = be16_to_cpu(block->bb_numrecs);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
if (ptr <= numrecs) {
if (level == 0) {
rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
xfs_btree_check_rec(XFS_BTNUM_BMAP, recp, rp);
} else {
kp = XFS_BMAP_KEY_IADDR(block, ptr, cur);
xfs_btree_check_key(XFS_BTNUM_BMAP, &key, kp);
}
}
#endif
nbno = NULLFSBLOCK;
if (numrecs == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
if (numrecs < XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
/*
* A root block, that can be made bigger.
*/
xfs_iroot_realloc(cur->bc_private.b.ip, 1,
cur->bc_private.b.whichfork);
block = xfs_bmbt_get_block(cur, level, &bp);
} else if (level == cur->bc_nlevels - 1) {
if ((error = xfs_bmbt_newroot(cur, &logflags, stat)) ||
*stat == 0) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip,
logflags);
block = xfs_bmbt_get_block(cur, level, &bp);
} else {
if ((error = xfs_bmbt_rshift(cur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
if (i) {
/* nothing */
} else {
if ((error = xfs_bmbt_lshift(cur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
if (i) {
optr = ptr = cur->bc_ptrs[level];
} else {
if ((error = xfs_bmbt_split(cur, level,
&nbno, &nkey, &ncur,
&i))) {
XFS_BMBT_TRACE_CURSOR(cur,
ERROR);
return error;
}
if (i) {
block = xfs_bmbt_get_block(
cur, level, &bp);
#ifdef DEBUG
if ((error =
xfs_btree_check_lblock(cur,
block, level, bp))) {
XFS_BMBT_TRACE_CURSOR(
cur, ERROR);
return error;
}
#endif
ptr = cur->bc_ptrs[level];
xfs_bmbt_disk_set_allf(&nrec,
nkey.br_startoff, 0, 0,
XFS_EXT_NORM);
} else {
XFS_BMBT_TRACE_CURSOR(cur,
EXIT);
*stat = 0;
return 0;
}
}
}
}
}
numrecs = be16_to_cpu(block->bb_numrecs);
if (level > 0) {
kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
#ifdef DEBUG
for (i = numrecs; i >= ptr; i--) {
if ((error = xfs_btree_check_lptr(cur, INT_GET(pp[i - 1], ARCH_CONVERT),
level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
}
#endif
memmove(&kp[ptr], &kp[ptr - 1],
(numrecs - ptr + 1) * sizeof(*kp));
memmove(&pp[ptr], &pp[ptr - 1], /* INT_: direct copy */
(numrecs - ptr + 1) * sizeof(*pp));
#ifdef DEBUG
if ((error = xfs_btree_check_lptr(cur, (xfs_bmbt_ptr_t)*bnop,
level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
kp[ptr - 1] = key;
INT_SET(pp[ptr - 1], ARCH_CONVERT, *bnop);
numrecs++;
block->bb_numrecs = cpu_to_be16(numrecs);
xfs_bmbt_log_keys(cur, bp, ptr, numrecs);
xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs);
} else {
rp = XFS_BMAP_REC_IADDR(block, 1, cur);
memmove(&rp[ptr], &rp[ptr - 1],
(numrecs - ptr + 1) * sizeof(*rp));
rp[ptr - 1] = *recp;
numrecs++;
block->bb_numrecs = cpu_to_be16(numrecs);
xfs_bmbt_log_recs(cur, bp, ptr, numrecs);
}
xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
#ifdef DEBUG
if (ptr < numrecs) {
if (level == 0)
xfs_btree_check_rec(XFS_BTNUM_BMAP, rp + ptr - 1,
rp + ptr);
else
xfs_btree_check_key(XFS_BTNUM_BMAP, kp + ptr - 1,
kp + ptr);
}
#endif
if (optr == 1 && (error = xfs_bmbt_updkey(cur, &key, level + 1))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
*bnop = nbno;
if (nbno != NULLFSBLOCK) {
*recp = nrec;
*curp = ncur;
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
STATIC int
xfs_bmbt_killroot(
xfs_btree_cur_t *cur)
{
xfs_bmbt_block_t *block;
xfs_bmbt_block_t *cblock;
xfs_buf_t *cbp;
xfs_bmbt_key_t *ckp;
xfs_bmbt_ptr_t *cpp;
#ifdef DEBUG
int error;
#endif
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_killroot";
#endif
int i;
xfs_bmbt_key_t *kp;
xfs_inode_t *ip;
xfs_ifork_t *ifp;
int level;
xfs_bmbt_ptr_t *pp;
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
level = cur->bc_nlevels - 1;
ASSERT(level >= 1);
/*
* Don't deal with the root block needs to be a leaf case.
* We're just going to turn the thing back into extents anyway.
*/
if (level == 1) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
return 0;
}
block = xfs_bmbt_get_block(cur, level, &cbp);
/*
* Give up if the root has multiple children.
*/
if (be16_to_cpu(block->bb_numrecs) != 1) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
return 0;
}
/*
* Only do this if the next level will fit.
* Then the data must be copied up to the inode,
* instead of freeing the root you free the next level.
*/
cbp = cur->bc_bufs[level - 1];
cblock = XFS_BUF_TO_BMBT_BLOCK(cbp);
if (be16_to_cpu(cblock->bb_numrecs) > XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
return 0;
}
ASSERT(be64_to_cpu(cblock->bb_leftsib) == NULLDFSBNO);
ASSERT(be64_to_cpu(cblock->bb_rightsib) == NULLDFSBNO);
ip = cur->bc_private.b.ip;
ifp = XFS_IFORK_PTR(ip, cur->bc_private.b.whichfork);
ASSERT(XFS_BMAP_BLOCK_IMAXRECS(level, cur) ==
XFS_BMAP_BROOT_MAXRECS(ifp->if_broot_bytes));
i = (int)(be16_to_cpu(cblock->bb_numrecs) - XFS_BMAP_BLOCK_IMAXRECS(level, cur));
if (i) {
xfs_iroot_realloc(ip, i, cur->bc_private.b.whichfork);
block = ifp->if_broot;
}
be16_add(&block->bb_numrecs, i);
ASSERT(block->bb_numrecs == cblock->bb_numrecs);
kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
ckp = XFS_BMAP_KEY_IADDR(cblock, 1, cur);
memcpy(kp, ckp, be16_to_cpu(block->bb_numrecs) * sizeof(*kp));
pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
#ifdef DEBUG
for (i = 0; i < be16_to_cpu(cblock->bb_numrecs); i++) {
if ((error = xfs_btree_check_lptr(cur, INT_GET(cpp[i], ARCH_CONVERT), level - 1))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
}
#endif
memcpy(pp, cpp, be16_to_cpu(block->bb_numrecs) * sizeof(*pp));
xfs_bmap_add_free(XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(cbp)), 1,
cur->bc_private.b.flist, cur->bc_mp);
ip->i_d.di_nblocks--;
XFS_TRANS_MOD_DQUOT_BYINO(cur->bc_mp, cur->bc_tp, ip,
XFS_TRANS_DQ_BCOUNT, -1L);
xfs_trans_binval(cur->bc_tp, cbp);
cur->bc_bufs[level - 1] = NULL;
be16_add(&block->bb_level, -1);
xfs_trans_log_inode(cur->bc_tp, ip,
XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
cur->bc_nlevels--;
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
return 0;
}
/*
* Log key values from the btree block.
*/
STATIC void
xfs_bmbt_log_keys(
xfs_btree_cur_t *cur,
xfs_buf_t *bp,
int kfirst,
int klast)
{
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_log_keys";
#endif
xfs_trans_t *tp;
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGBII(cur, bp, kfirst, klast);
tp = cur->bc_tp;
if (bp) {
xfs_bmbt_block_t *block;
int first;
xfs_bmbt_key_t *kp;
int last;
block = XFS_BUF_TO_BMBT_BLOCK(bp);
kp = XFS_BMAP_KEY_DADDR(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(tp, bp, first, last);
} else {
xfs_inode_t *ip;
ip = cur->bc_private.b.ip;
xfs_trans_log_inode(tp, ip,
XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
}
/*
* Log pointer values from the btree block.
*/
STATIC void
xfs_bmbt_log_ptrs(
xfs_btree_cur_t *cur,
xfs_buf_t *bp,
int pfirst,
int plast)
{
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_log_ptrs";
#endif
xfs_trans_t *tp;
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGBII(cur, bp, pfirst, plast);
tp = cur->bc_tp;
if (bp) {
xfs_bmbt_block_t *block;
int first;
int last;
xfs_bmbt_ptr_t *pp;
block = XFS_BUF_TO_BMBT_BLOCK(bp);
pp = XFS_BMAP_PTR_DADDR(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(tp, bp, first, last);
} else {
xfs_inode_t *ip;
ip = cur->bc_private.b.ip;
xfs_trans_log_inode(tp, ip,
XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
}
/*
* Lookup the record. The cursor is made to point to it, based on dir.
*/
STATIC int /* error */
xfs_bmbt_lookup(
xfs_btree_cur_t *cur,
xfs_lookup_t dir,
int *stat) /* success/failure */
{
xfs_bmbt_block_t *block=NULL;
xfs_buf_t *bp;
xfs_daddr_t d;
xfs_sfiloff_t diff;
int error; /* error return value */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_lookup";
#endif
xfs_fsblock_t fsbno=0;
int high;
int i;
int keyno=0;
xfs_bmbt_key_t *kkbase=NULL;
xfs_bmbt_key_t *kkp;
xfs_bmbt_rec_t *krbase=NULL;
xfs_bmbt_rec_t *krp;
int level;
int low;
xfs_mount_t *mp;
xfs_bmbt_ptr_t *pp;
xfs_bmbt_irec_t *rp;
xfs_fileoff_t startoff;
xfs_trans_t *tp;
XFS_STATS_INC(xs_bmbt_lookup);
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGI(cur, (int)dir);
tp = cur->bc_tp;
mp = cur->bc_mp;
rp = &cur->bc_rec.b;
for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) {
if (level < cur->bc_nlevels - 1) {
d = XFS_FSB_TO_DADDR(mp, fsbno);
bp = cur->bc_bufs[level];
if (bp && XFS_BUF_ADDR(bp) != d)
bp = (xfs_buf_t *)0;
if (!bp) {
if ((error = xfs_btree_read_bufl(mp, tp, fsbno,
0, &bp, XFS_BMAP_BTREE_REF))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
xfs_btree_setbuf(cur, level, bp);
block = XFS_BUF_TO_BMBT_BLOCK(bp);
if ((error = xfs_btree_check_lblock(cur, block,
level, bp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
} else
block = XFS_BUF_TO_BMBT_BLOCK(bp);
} else
block = xfs_bmbt_get_block(cur, level, &bp);
if (diff == 0)
keyno = 1;
else {
if (level > 0)
kkbase = XFS_BMAP_KEY_IADDR(block, 1, cur);
else
krbase = XFS_BMAP_REC_IADDR(block, 1, cur);
low = 1;
if (!(high = be16_to_cpu(block->bb_numrecs))) {
ASSERT(level == 0);
cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE;
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
while (low <= high) {
XFS_STATS_INC(xs_bmbt_compare);
keyno = (low + high) >> 1;
if (level > 0) {
kkp = kkbase + keyno - 1;
startoff = INT_GET(kkp->br_startoff, ARCH_CONVERT);
} else {
krp = krbase + keyno - 1;
startoff = xfs_bmbt_disk_get_startoff(krp);
}
diff = (xfs_sfiloff_t)
(startoff - rp->br_startoff);
if (diff < 0)
low = keyno + 1;
else if (diff > 0)
high = keyno - 1;
else
break;
}
}
if (level > 0) {
if (diff > 0 && --keyno < 1)
keyno = 1;
pp = XFS_BMAP_PTR_IADDR(block, keyno, cur);
#ifdef DEBUG
if ((error = xfs_btree_check_lptr(cur, INT_GET(*pp, ARCH_CONVERT), level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
fsbno = INT_GET(*pp, ARCH_CONVERT);
cur->bc_ptrs[level] = keyno;
}
}
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) &&
be64_to_cpu(block->bb_rightsib) != NULLDFSBNO) {
cur->bc_ptrs[0] = keyno;
if ((error = xfs_bmbt_increment(cur, 0, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
XFS_WANT_CORRUPTED_RETURN(i == 1);
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
}
else if (dir == XFS_LOOKUP_LE && diff > 0)
keyno--;
cur->bc_ptrs[0] = keyno;
if (keyno == 0 || keyno > be16_to_cpu(block->bb_numrecs)) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
} else {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*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.
*/
STATIC int /* error */
xfs_bmbt_lshift(
xfs_btree_cur_t *cur,
int level,
int *stat) /* success/failure */
{
int error; /* error return value */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_lshift";
#endif
#ifdef DEBUG
int i; /* loop counter */
#endif
xfs_bmbt_key_t key; /* bmap btree key */
xfs_buf_t *lbp; /* left buffer pointer */
xfs_bmbt_block_t *left; /* left btree block */
xfs_bmbt_key_t *lkp=NULL; /* left btree key */
xfs_bmbt_ptr_t *lpp; /* left address pointer */
int lrecs; /* left record count */
xfs_bmbt_rec_t *lrp=NULL; /* left record pointer */
xfs_mount_t *mp; /* file system mount point */
xfs_buf_t *rbp; /* right buffer pointer */
xfs_bmbt_block_t *right; /* right btree block */
xfs_bmbt_key_t *rkp=NULL; /* right btree key */
xfs_bmbt_ptr_t *rpp=NULL; /* right address pointer */
xfs_bmbt_rec_t *rrp=NULL; /* right record pointer */
int rrecs; /* right record count */
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGI(cur, level);
if (level == cur->bc_nlevels - 1) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
rbp = cur->bc_bufs[level];
right = XFS_BUF_TO_BMBT_BLOCK(rbp);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
if (be64_to_cpu(right->bb_leftsib) == NULLDFSBNO) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
if (cur->bc_ptrs[level] <= 1) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
mp = cur->bc_mp;
if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, be64_to_cpu(right->bb_leftsib), 0,
&lbp, XFS_BMAP_BTREE_REF))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
left = XFS_BUF_TO_BMBT_BLOCK(lbp);
if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
if (be16_to_cpu(left->bb_numrecs) == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
lrecs = be16_to_cpu(left->bb_numrecs) + 1;
if (level > 0) {
lkp = XFS_BMAP_KEY_IADDR(left, lrecs, cur);
rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
*lkp = *rkp;
xfs_bmbt_log_keys(cur, lbp, lrecs, lrecs);
lpp = XFS_BMAP_PTR_IADDR(left, lrecs, cur);
rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
#ifdef DEBUG
if ((error = xfs_btree_check_lptr(cur, INT_GET(*rpp, ARCH_CONVERT), level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
*lpp = *rpp; /* INT_: direct copy */
xfs_bmbt_log_ptrs(cur, lbp, lrecs, lrecs);
} else {
lrp = XFS_BMAP_REC_IADDR(left, lrecs, cur);
rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
*lrp = *rrp;
xfs_bmbt_log_recs(cur, lbp, lrecs, lrecs);
}
left->bb_numrecs = cpu_to_be16(lrecs);
xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
#ifdef DEBUG
if (level > 0)
xfs_btree_check_key(XFS_BTNUM_BMAP, lkp - 1, lkp);
else
xfs_btree_check_rec(XFS_BTNUM_BMAP, lrp - 1, lrp);
#endif
rrecs = be16_to_cpu(right->bb_numrecs) - 1;
right->bb_numrecs = cpu_to_be16(rrecs);
xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
if (level > 0) {
#ifdef DEBUG
for (i = 0; i < rrecs; i++) {
if ((error = xfs_btree_check_lptr(cur, INT_GET(rpp[i + 1], ARCH_CONVERT),
level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
}
#endif
memmove(rkp, rkp + 1, rrecs * sizeof(*rkp));
memmove(rpp, rpp + 1, rrecs * sizeof(*rpp));
xfs_bmbt_log_keys(cur, rbp, 1, rrecs);
xfs_bmbt_log_ptrs(cur, rbp, 1, rrecs);
} else {
memmove(rrp, rrp + 1, rrecs * sizeof(*rrp));
xfs_bmbt_log_recs(cur, rbp, 1, rrecs);
INT_SET(key.br_startoff, ARCH_CONVERT,
xfs_bmbt_disk_get_startoff(rrp));
rkp = &key;
}
if ((error = xfs_bmbt_updkey(cur, rkp, level + 1))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
cur->bc_ptrs[level]--;
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
/*
* Move 1 record right from cur/level if possible.
* Update cur to reflect the new path.
*/
STATIC int /* error */
xfs_bmbt_rshift(
xfs_btree_cur_t *cur,
int level,
int *stat) /* success/failure */
{
int error; /* error return value */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_rshift";
#endif
int i; /* loop counter */
xfs_bmbt_key_t key; /* bmap btree key */
xfs_buf_t *lbp; /* left buffer pointer */
xfs_bmbt_block_t *left; /* left btree block */
xfs_bmbt_key_t *lkp; /* left btree key */
xfs_bmbt_ptr_t *lpp; /* left address pointer */
xfs_bmbt_rec_t *lrp; /* left record pointer */
xfs_mount_t *mp; /* file system mount point */
xfs_buf_t *rbp; /* right buffer pointer */
xfs_bmbt_block_t *right; /* right btree block */
xfs_bmbt_key_t *rkp; /* right btree key */
xfs_bmbt_ptr_t *rpp; /* right address pointer */
xfs_bmbt_rec_t *rrp=NULL; /* right record pointer */
struct xfs_btree_cur *tcur; /* temporary btree cursor */
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGI(cur, level);
if (level == cur->bc_nlevels - 1) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
lbp = cur->bc_bufs[level];
left = XFS_BUF_TO_BMBT_BLOCK(lbp);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
if (be64_to_cpu(left->bb_rightsib) == NULLDFSBNO) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
if (cur->bc_ptrs[level] >= be16_to_cpu(left->bb_numrecs)) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
mp = cur->bc_mp;
if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, be64_to_cpu(left->bb_rightsib), 0,
&rbp, XFS_BMAP_BTREE_REF))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
right = XFS_BUF_TO_BMBT_BLOCK(rbp);
if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
if (be16_to_cpu(right->bb_numrecs) == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
if (level > 0) {
lkp = XFS_BMAP_KEY_IADDR(left, be16_to_cpu(left->bb_numrecs), cur);
lpp = XFS_BMAP_PTR_IADDR(left, be16_to_cpu(left->bb_numrecs), cur);
rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
#ifdef DEBUG
for (i = be16_to_cpu(right->bb_numrecs) - 1; i >= 0; i--) {
if ((error = xfs_btree_check_lptr(cur, INT_GET(rpp[i], ARCH_CONVERT), level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
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_lptr(cur, INT_GET(*lpp, ARCH_CONVERT), level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
*rkp = *lkp;
*rpp = *lpp; /* INT_: direct copy */
xfs_bmbt_log_keys(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
xfs_bmbt_log_ptrs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
} else {
lrp = XFS_BMAP_REC_IADDR(left, be16_to_cpu(left->bb_numrecs), cur);
rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
memmove(rrp + 1, rrp, be16_to_cpu(right->bb_numrecs) * sizeof(*rrp));
*rrp = *lrp;
xfs_bmbt_log_recs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
INT_SET(key.br_startoff, ARCH_CONVERT,
xfs_bmbt_disk_get_startoff(rrp));
rkp = &key;
}
be16_add(&left->bb_numrecs, -1);
xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
be16_add(&right->bb_numrecs, 1);
#ifdef DEBUG
if (level > 0)
xfs_btree_check_key(XFS_BTNUM_BMAP, rkp, rkp + 1);
else
xfs_btree_check_rec(XFS_BTNUM_BMAP, rrp, rrp + 1);
#endif
xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
if ((error = xfs_btree_dup_cursor(cur, &tcur))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
i = xfs_btree_lastrec(tcur, level);
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
if ((error = xfs_bmbt_increment(tcur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
goto error1;
}
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
if ((error = xfs_bmbt_updkey(tcur, rkp, level + 1))) {
XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
goto error1;
}
xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
error0:
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
error1:
xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
return error;
}
/*
* Determine the extent state.
*/
/* ARGSUSED */
STATIC xfs_exntst_t
xfs_extent_state(
xfs_filblks_t blks,
int extent_flag)
{
if (extent_flag) {
ASSERT(blks != 0); /* saved for DMIG */
return XFS_EXT_UNWRITTEN;
}
return XFS_EXT_NORM;
}
/*
* Split cur/level block in half.
* Return new block number and its first record (to be inserted into parent).
*/
STATIC int /* error */
xfs_bmbt_split(
xfs_btree_cur_t *cur,
int level,
xfs_fsblock_t *bnop,
xfs_bmbt_key_t *keyp,
xfs_btree_cur_t **curp,
int *stat) /* success/failure */
{
xfs_alloc_arg_t args; /* block allocation args */
int error; /* error return value */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_split";
#endif
int i; /* loop counter */
xfs_fsblock_t lbno; /* left sibling block number */
xfs_buf_t *lbp; /* left buffer pointer */
xfs_bmbt_block_t *left; /* left btree block */
xfs_bmbt_key_t *lkp; /* left btree key */
xfs_bmbt_ptr_t *lpp; /* left address pointer */
xfs_bmbt_rec_t *lrp; /* left record pointer */
xfs_buf_t *rbp; /* right buffer pointer */
xfs_bmbt_block_t *right; /* right btree block */
xfs_bmbt_key_t *rkp; /* right btree key */
xfs_bmbt_ptr_t *rpp; /* right address pointer */
xfs_bmbt_block_t *rrblock; /* right-right btree block */
xfs_buf_t *rrbp; /* right-right buffer pointer */
xfs_bmbt_rec_t *rrp; /* right record pointer */
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGIFK(cur, level, *bnop, keyp);
args.tp = cur->bc_tp;
args.mp = cur->bc_mp;
lbp = cur->bc_bufs[level];
lbno = XFS_DADDR_TO_FSB(args.mp, XFS_BUF_ADDR(lbp));
left = XFS_BUF_TO_BMBT_BLOCK(lbp);
args.fsbno = cur->bc_private.b.firstblock;
args.firstblock = args.fsbno;
if (args.fsbno == NULLFSBLOCK) {
args.fsbno = lbno;
args.type = XFS_ALLOCTYPE_START_BNO;
} else
args.type = XFS_ALLOCTYPE_NEAR_BNO;
args.mod = args.minleft = args.alignment = args.total = args.isfl =
args.userdata = args.minalignslop = 0;
args.minlen = args.maxlen = args.prod = 1;
args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return XFS_ERROR(ENOSPC);
}
if ((error = xfs_alloc_vextent(&args))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
if (args.fsbno == NULLFSBLOCK) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
ASSERT(args.len == 1);
cur->bc_private.b.firstblock = args.fsbno;
cur->bc_private.b.allocated++;
cur->bc_private.b.ip->i_d.di_nblocks++;
xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
XFS_TRANS_DQ_BCOUNT, 1L);
rbp = xfs_btree_get_bufl(args.mp, args.tp, args.fsbno, 0);
right = XFS_BUF_TO_BMBT_BLOCK(rbp);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, left, level, rbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
right->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
right->bb_level = left->bb_level;
right->bb_numrecs = cpu_to_be16(be16_to_cpu(left->bb_numrecs) / 2);
if ((be16_to_cpu(left->bb_numrecs) & 1) &&
cur->bc_ptrs[level] <= be16_to_cpu(right->bb_numrecs) + 1)
be16_add(&right->bb_numrecs, 1);
i = be16_to_cpu(left->bb_numrecs) - be16_to_cpu(right->bb_numrecs) + 1;
if (level > 0) {
lkp = XFS_BMAP_KEY_IADDR(left, i, cur);
lpp = XFS_BMAP_PTR_IADDR(left, i, cur);
rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
#ifdef DEBUG
for (i = 0; i < be16_to_cpu(right->bb_numrecs); i++) {
if ((error = xfs_btree_check_lptr(cur, INT_GET(lpp[i], ARCH_CONVERT), level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
}
#endif
memcpy(rkp, lkp, be16_to_cpu(right->bb_numrecs) * sizeof(*rkp));
memcpy(rpp, lpp, be16_to_cpu(right->bb_numrecs) * sizeof(*rpp));
xfs_bmbt_log_keys(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
xfs_bmbt_log_ptrs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
keyp->br_startoff = INT_GET(rkp->br_startoff, ARCH_CONVERT);
} else {
lrp = XFS_BMAP_REC_IADDR(left, i, cur);
rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
memcpy(rrp, lrp, be16_to_cpu(right->bb_numrecs) * sizeof(*rrp));
xfs_bmbt_log_recs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
keyp->br_startoff = xfs_bmbt_disk_get_startoff(rrp);
}
be16_add(&left->bb_numrecs, -(be16_to_cpu(right->bb_numrecs)));
right->bb_rightsib = left->bb_rightsib;
left->bb_rightsib = cpu_to_be64(args.fsbno);
right->bb_leftsib = cpu_to_be64(lbno);
xfs_bmbt_log_block(cur, rbp, XFS_BB_ALL_BITS);
xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
if (be64_to_cpu(right->bb_rightsib) != NULLDFSBNO) {
if ((error = xfs_btree_read_bufl(args.mp, args.tp,
be64_to_cpu(right->bb_rightsib), 0, &rrbp,
XFS_BMAP_BTREE_REF))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
rrblock->bb_leftsib = cpu_to_be64(args.fsbno);
xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
}
if (cur->bc_ptrs[level] > be16_to_cpu(left->bb_numrecs) + 1) {
xfs_btree_setbuf(cur, level, rbp);
cur->bc_ptrs[level] -= be16_to_cpu(left->bb_numrecs);
}
if (level + 1 < cur->bc_nlevels) {
if ((error = xfs_btree_dup_cursor(cur, curp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
(*curp)->bc_ptrs[level + 1]++;
}
*bnop = args.fsbno;
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
/*
* Update keys for the record.
*/
STATIC int
xfs_bmbt_updkey(
xfs_btree_cur_t *cur,
xfs_bmbt_key_t *keyp, /* on-disk format */
int level)
{
xfs_bmbt_block_t *block;
xfs_buf_t *bp;
#ifdef DEBUG
int error;
#endif
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_updkey";
#endif
xfs_bmbt_key_t *kp;
int ptr;
ASSERT(level >= 1);
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGIK(cur, level, keyp);
for (ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
block = xfs_bmbt_get_block(cur, level, &bp);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
ptr = cur->bc_ptrs[level];
kp = XFS_BMAP_KEY_IADDR(block, ptr, cur);
*kp = *keyp;
xfs_bmbt_log_keys(cur, bp, ptr, ptr);
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
return 0;
}
/*
* Convert on-disk form of btree root to in-memory form.
*/
void
xfs_bmdr_to_bmbt(
xfs_bmdr_block_t *dblock,
int dblocklen,
xfs_bmbt_block_t *rblock,
int rblocklen)
{
int dmxr;
xfs_bmbt_key_t *fkp;
xfs_bmbt_ptr_t *fpp;
xfs_bmbt_key_t *tkp;
xfs_bmbt_ptr_t *tpp;
rblock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
rblock->bb_level = dblock->bb_level;
ASSERT(be16_to_cpu(rblock->bb_level) > 0);
rblock->bb_numrecs = dblock->bb_numrecs;
rblock->bb_leftsib = cpu_to_be64(NULLDFSBNO);
rblock->bb_rightsib = cpu_to_be64(NULLDFSBNO);
dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0);
fkp = XFS_BTREE_KEY_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
tkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen);
fpp = XFS_BTREE_PTR_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
tpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen);
dmxr = be16_to_cpu(dblock->bb_numrecs);
memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
memcpy(tpp, fpp, sizeof(*fpp) * dmxr); /* INT_: direct copy */
}
/*
* Decrement cursor by one record at the level.
* For nonzero levels the leaf-ward information is untouched.
*/
int /* error */
xfs_bmbt_decrement(
xfs_btree_cur_t *cur,
int level,
int *stat) /* success/failure */
{
xfs_bmbt_block_t *block;
xfs_buf_t *bp;
int error; /* error return value */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_decrement";
#endif
xfs_fsblock_t fsbno;
int lev;
xfs_mount_t *mp;
xfs_trans_t *tp;
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGI(cur, level);
ASSERT(level < cur->bc_nlevels);
if (level < cur->bc_nlevels - 1)
xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA);
if (--cur->bc_ptrs[level] > 0) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
block = xfs_bmbt_get_block(cur, level, &bp);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
if (be64_to_cpu(block->bb_leftsib) == NULLDFSBNO) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
if (--cur->bc_ptrs[lev] > 0)
break;
if (lev < cur->bc_nlevels - 1)
xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA);
}
if (lev == cur->bc_nlevels) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
tp = cur->bc_tp;
mp = cur->bc_mp;
for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
fsbno = INT_GET(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur), ARCH_CONVERT);
if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
XFS_BMAP_BTREE_REF))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
lev--;
xfs_btree_setbuf(cur, lev, bp);
block = XFS_BUF_TO_BMBT_BLOCK(bp);
if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
cur->bc_ptrs[lev] = be16_to_cpu(block->bb_numrecs);
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
/*
* Delete the record pointed to by cur.
*/
int /* error */
xfs_bmbt_delete(
xfs_btree_cur_t *cur,
int *stat) /* success/failure */
{
int error; /* error return value */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_delete";
#endif
int i;
int level;
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
for (level = 0, i = 2; i == 2; level++) {
if ((error = xfs_bmbt_delrec(cur, level, &i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
}
if (i == 0) {
for (level = 1; level < cur->bc_nlevels; level++) {
if (cur->bc_ptrs[level] == 0) {
if ((error = xfs_bmbt_decrement(cur, level,
&i))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
break;
}
}
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = i;
return 0;
}
/*
* Convert a compressed bmap extent record to an uncompressed form.
* This code must be in sync with the routines xfs_bmbt_get_startoff,
* xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state.
*/
STATIC __inline__ void
__xfs_bmbt_get_all(
__uint64_t l0,
__uint64_t l1,
xfs_bmbt_irec_t *s)
{
int ext_flag;
xfs_exntst_t st;
ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN));
s->br_startoff = ((xfs_fileoff_t)l0 &
XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
#if XFS_BIG_BLKNOS
s->br_startblock = (((xfs_fsblock_t)l0 & XFS_MASK64LO(9)) << 43) |
(((xfs_fsblock_t)l1) >> 21);
#else
#ifdef DEBUG
{
xfs_dfsbno_t b;
b = (((xfs_dfsbno_t)l0 & XFS_MASK64LO(9)) << 43) |
(((xfs_dfsbno_t)l1) >> 21);
ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
s->br_startblock = (xfs_fsblock_t)b;
}
#else /* !DEBUG */
s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21);
#endif /* DEBUG */
#endif /* XFS_BIG_BLKNOS */
s->br_blockcount = (xfs_filblks_t)(l1 & XFS_MASK64LO(21));
/* This is xfs_extent_state() in-line */
if (ext_flag) {
ASSERT(s->br_blockcount != 0); /* saved for DMIG */
st = XFS_EXT_UNWRITTEN;
} else
st = XFS_EXT_NORM;
s->br_state = st;
}
void
xfs_bmbt_get_all(
xfs_bmbt_rec_t *r,
xfs_bmbt_irec_t *s)
{
__xfs_bmbt_get_all(r->l0, r->l1, s);
}
/*
* Get the block pointer for the given level of the cursor.
* Fill in the buffer pointer, if applicable.
*/
xfs_bmbt_block_t *
xfs_bmbt_get_block(
xfs_btree_cur_t *cur,
int level,
xfs_buf_t **bpp)
{
xfs_ifork_t *ifp;
xfs_bmbt_block_t *rval;
if (level < cur->bc_nlevels - 1) {
*bpp = cur->bc_bufs[level];
rval = XFS_BUF_TO_BMBT_BLOCK(*bpp);
} else {
*bpp = NULL;
ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
cur->bc_private.b.whichfork);
rval = ifp->if_broot;
}
return rval;
}
/*
* Extract the blockcount field from an in memory bmap extent record.
*/
xfs_filblks_t
xfs_bmbt_get_blockcount(
xfs_bmbt_rec_t *r)
{
return (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21));
}
/*
* Extract the startblock field from an in memory bmap extent record.
*/
xfs_fsblock_t
xfs_bmbt_get_startblock(
xfs_bmbt_rec_t *r)
{
#if XFS_BIG_BLKNOS
return (((xfs_fsblock_t)r->l0 & XFS_MASK64LO(9)) << 43) |
(((xfs_fsblock_t)r->l1) >> 21);
#else
#ifdef DEBUG
xfs_dfsbno_t b;
b = (((xfs_dfsbno_t)r->l0 & XFS_MASK64LO(9)) << 43) |
(((xfs_dfsbno_t)r->l1) >> 21);
ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
return (xfs_fsblock_t)b;
#else /* !DEBUG */
return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21);
#endif /* DEBUG */
#endif /* XFS_BIG_BLKNOS */
}
/*
* Extract the startoff field from an in memory bmap extent record.
*/
xfs_fileoff_t
xfs_bmbt_get_startoff(
xfs_bmbt_rec_t *r)
{
return ((xfs_fileoff_t)r->l0 &
XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
}
xfs_exntst_t
xfs_bmbt_get_state(
xfs_bmbt_rec_t *r)
{
int ext_flag;
ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN));
return xfs_extent_state(xfs_bmbt_get_blockcount(r),
ext_flag);
}
#ifndef XFS_NATIVE_HOST
/* Endian flipping versions of the bmbt extraction functions */
void
xfs_bmbt_disk_get_all(
xfs_bmbt_rec_t *r,
xfs_bmbt_irec_t *s)
{
__uint64_t l0, l1;
l0 = INT_GET(r->l0, ARCH_CONVERT);
l1 = INT_GET(r->l1, ARCH_CONVERT);
__xfs_bmbt_get_all(l0, l1, s);
}
/*
* Extract the blockcount field from an on disk bmap extent record.
*/
xfs_filblks_t
xfs_bmbt_disk_get_blockcount(
xfs_bmbt_rec_t *r)
{
return (xfs_filblks_t)(INT_GET(r->l1, ARCH_CONVERT) & XFS_MASK64LO(21));
}
/*
* Extract the startblock field from an on disk bmap extent record.
*/
xfs_fsblock_t
xfs_bmbt_disk_get_startblock(
xfs_bmbt_rec_t *r)
{
#if XFS_BIG_BLKNOS
return (((xfs_fsblock_t)INT_GET(r->l0, ARCH_CONVERT) & XFS_MASK64LO(9)) << 43) |
(((xfs_fsblock_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
#else
#ifdef DEBUG
xfs_dfsbno_t b;
b = (((xfs_dfsbno_t)INT_GET(r->l0, ARCH_CONVERT) & XFS_MASK64LO(9)) << 43) |
(((xfs_dfsbno_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
return (xfs_fsblock_t)b;
#else /* !DEBUG */
return (xfs_fsblock_t)(((xfs_dfsbno_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
#endif /* DEBUG */
#endif /* XFS_BIG_BLKNOS */
}
/*
* Extract the startoff field from a disk format bmap extent record.
*/
xfs_fileoff_t
xfs_bmbt_disk_get_startoff(
xfs_bmbt_rec_t *r)
{
return ((xfs_fileoff_t)INT_GET(r->l0, ARCH_CONVERT) &
XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
}
xfs_exntst_t
xfs_bmbt_disk_get_state(
xfs_bmbt_rec_t *r)
{
int ext_flag;
ext_flag = (int)((INT_GET(r->l0, ARCH_CONVERT)) >> (64 - BMBT_EXNTFLAG_BITLEN));
return xfs_extent_state(xfs_bmbt_disk_get_blockcount(r),
ext_flag);
}
#endif /* XFS_NATIVE_HOST */
/*
* Increment cursor by one record at the level.
* For nonzero levels the leaf-ward information is untouched.
*/
int /* error */
xfs_bmbt_increment(
xfs_btree_cur_t *cur,
int level,
int *stat) /* success/failure */
{
xfs_bmbt_block_t *block;
xfs_buf_t *bp;
int error; /* error return value */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_increment";
#endif
xfs_fsblock_t fsbno;
int lev;
xfs_mount_t *mp;
xfs_trans_t *tp;
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGI(cur, level);
ASSERT(level < cur->bc_nlevels);
if (level < cur->bc_nlevels - 1)
xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA);
block = xfs_bmbt_get_block(cur, level, &bp);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
if (++cur->bc_ptrs[level] <= be16_to_cpu(block->bb_numrecs)) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
if (be64_to_cpu(block->bb_rightsib) == NULLDFSBNO) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
block = xfs_bmbt_get_block(cur, lev, &bp);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
if (++cur->bc_ptrs[lev] <= be16_to_cpu(block->bb_numrecs))
break;
if (lev < cur->bc_nlevels - 1)
xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA);
}
if (lev == cur->bc_nlevels) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
tp = cur->bc_tp;
mp = cur->bc_mp;
for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
fsbno = INT_GET(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur), ARCH_CONVERT);
if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
XFS_BMAP_BTREE_REF))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
lev--;
xfs_btree_setbuf(cur, lev, bp);
block = XFS_BUF_TO_BMBT_BLOCK(bp);
if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
cur->bc_ptrs[lev] = 1;
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 1;
return 0;
}
/*
* Insert the current record at the point referenced by cur.
*/
int /* error */
xfs_bmbt_insert(
xfs_btree_cur_t *cur,
int *stat) /* success/failure */
{
int error; /* error return value */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_insert";
#endif
int i;
int level;
xfs_fsblock_t nbno;
xfs_btree_cur_t *ncur;
xfs_bmbt_rec_t nrec;
xfs_btree_cur_t *pcur;
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
level = 0;
nbno = NULLFSBLOCK;
xfs_bmbt_disk_set_all(&nrec, &cur->bc_rec.b);
ncur = (xfs_btree_cur_t *)0;
pcur = cur;
do {
if ((error = xfs_bmbt_insrec(pcur, level++, &nbno, &nrec, &ncur,
&i))) {
if (pcur != cur)
xfs_btree_del_cursor(pcur, XFS_BTREE_ERROR);
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
if (pcur != cur && (ncur || nbno == NULLFSBLOCK)) {
cur->bc_nlevels = pcur->bc_nlevels;
cur->bc_private.b.allocated +=
pcur->bc_private.b.allocated;
pcur->bc_private.b.allocated = 0;
ASSERT((cur->bc_private.b.firstblock != NULLFSBLOCK) ||
(cur->bc_private.b.ip->i_d.di_flags &
XFS_DIFLAG_REALTIME));
cur->bc_private.b.firstblock =
pcur->bc_private.b.firstblock;
ASSERT(cur->bc_private.b.flist ==
pcur->bc_private.b.flist);
xfs_btree_del_cursor(pcur, XFS_BTREE_NOERROR);
}
if (ncur) {
pcur = ncur;
ncur = (xfs_btree_cur_t *)0;
}
} while (nbno != NULLFSBLOCK);
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = i;
return 0;
error0:
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
/*
* Log fields from the btree block header.
*/
void
xfs_bmbt_log_block(
xfs_btree_cur_t *cur,
xfs_buf_t *bp,
int fields)
{
int first;
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_log_block";
#endif
int last;
xfs_trans_t *tp;
static const short offsets[] = {
offsetof(xfs_bmbt_block_t, bb_magic),
offsetof(xfs_bmbt_block_t, bb_level),
offsetof(xfs_bmbt_block_t, bb_numrecs),
offsetof(xfs_bmbt_block_t, bb_leftsib),
offsetof(xfs_bmbt_block_t, bb_rightsib),
sizeof(xfs_bmbt_block_t)
};
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGBI(cur, bp, fields);
tp = cur->bc_tp;
if (bp) {
xfs_btree_offsets(fields, offsets, XFS_BB_NUM_BITS, &first,
&last);
xfs_trans_log_buf(tp, bp, first, last);
} else
xfs_trans_log_inode(tp, cur->bc_private.b.ip,
XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
}
/*
* Log record values from the btree block.
*/
void
xfs_bmbt_log_recs(
xfs_btree_cur_t *cur,
xfs_buf_t *bp,
int rfirst,
int rlast)
{
xfs_bmbt_block_t *block;
int first;
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_log_recs";
#endif
int last;
xfs_bmbt_rec_t *rp;
xfs_trans_t *tp;
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGBII(cur, bp, rfirst, rlast);
ASSERT(bp);
tp = cur->bc_tp;
block = XFS_BUF_TO_BMBT_BLOCK(bp);
rp = XFS_BMAP_REC_DADDR(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(tp, bp, first, last);
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
}
int /* error */
xfs_bmbt_lookup_eq(
xfs_btree_cur_t *cur,
xfs_fileoff_t off,
xfs_fsblock_t bno,
xfs_filblks_t len,
int *stat) /* success/failure */
{
cur->bc_rec.b.br_startoff = off;
cur->bc_rec.b.br_startblock = bno;
cur->bc_rec.b.br_blockcount = len;
return xfs_bmbt_lookup(cur, XFS_LOOKUP_EQ, stat);
}
int /* error */
xfs_bmbt_lookup_ge(
xfs_btree_cur_t *cur,
xfs_fileoff_t off,
xfs_fsblock_t bno,
xfs_filblks_t len,
int *stat) /* success/failure */
{
cur->bc_rec.b.br_startoff = off;
cur->bc_rec.b.br_startblock = bno;
cur->bc_rec.b.br_blockcount = len;
return xfs_bmbt_lookup(cur, XFS_LOOKUP_GE, stat);
}
/*
* Give the bmap btree a new root block. Copy the old broot contents
* down into a real block and make the broot point to it.
*/
int /* error */
xfs_bmbt_newroot(
xfs_btree_cur_t *cur, /* btree cursor */
int *logflags, /* logging flags for inode */
int *stat) /* return status - 0 fail */
{
xfs_alloc_arg_t args; /* allocation arguments */
xfs_bmbt_block_t *block; /* bmap btree block */
xfs_buf_t *bp; /* buffer for block */
xfs_bmbt_block_t *cblock; /* child btree block */
xfs_bmbt_key_t *ckp; /* child key pointer */
xfs_bmbt_ptr_t *cpp; /* child ptr pointer */
int error; /* error return code */
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_newroot";
#endif
#ifdef DEBUG
int i; /* loop counter */
#endif
xfs_bmbt_key_t *kp; /* pointer to bmap btree key */
int level; /* btree level */
xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
level = cur->bc_nlevels - 1;
block = xfs_bmbt_get_block(cur, level, &bp);
/*
* Copy the root into a real block.
*/
args.mp = cur->bc_mp;
pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
args.tp = cur->bc_tp;
args.fsbno = cur->bc_private.b.firstblock;
args.mod = args.minleft = args.alignment = args.total = args.isfl =
args.userdata = args.minalignslop = 0;
args.minlen = args.maxlen = args.prod = 1;
args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
args.firstblock = args.fsbno;
if (args.fsbno == NULLFSBLOCK) {
#ifdef DEBUG
if ((error = xfs_btree_check_lptr(cur, INT_GET(*pp, ARCH_CONVERT), level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
args.fsbno = INT_GET(*pp, ARCH_CONVERT);
args.type = XFS_ALLOCTYPE_START_BNO;
} else
args.type = XFS_ALLOCTYPE_NEAR_BNO;
if ((error = xfs_alloc_vextent(&args))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
if (args.fsbno == NULLFSBLOCK) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;
return 0;
}
ASSERT(args.len == 1);
cur->bc_private.b.firstblock = args.fsbno;
cur->bc_private.b.allocated++;
cur->bc_private.b.ip->i_d.di_nblocks++;
XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
XFS_TRANS_DQ_BCOUNT, 1L);
bp = xfs_btree_get_bufl(args.mp, cur->bc_tp, args.fsbno, 0);
cblock = XFS_BUF_TO_BMBT_BLOCK(bp);
*cblock = *block;
be16_add(&block->bb_level, 1);
block->bb_numrecs = cpu_to_be16(1);
cur->bc_nlevels++;
cur->bc_ptrs[level + 1] = 1;
kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
ckp = XFS_BMAP_KEY_IADDR(cblock, 1, cur);
memcpy(ckp, kp, be16_to_cpu(cblock->bb_numrecs) * sizeof(*kp));
cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
#ifdef DEBUG
for (i = 0; i < be16_to_cpu(cblock->bb_numrecs); i++) {
if ((error = xfs_btree_check_lptr(cur, INT_GET(pp[i], ARCH_CONVERT), level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
}
#endif
memcpy(cpp, pp, be16_to_cpu(cblock->bb_numrecs) * sizeof(*pp));
#ifdef DEBUG
if ((error = xfs_btree_check_lptr(cur, (xfs_bmbt_ptr_t)args.fsbno,
level))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
INT_SET(*pp, ARCH_CONVERT, args.fsbno);
xfs_iroot_realloc(cur->bc_private.b.ip, 1 - be16_to_cpu(cblock->bb_numrecs),
cur->bc_private.b.whichfork);
xfs_btree_setbuf(cur, level, bp);
/*
* Do all this logging at the end so that
* the root is at the right level.
*/
xfs_bmbt_log_block(cur, bp, XFS_BB_ALL_BITS);
xfs_bmbt_log_keys(cur, bp, 1, be16_to_cpu(cblock->bb_numrecs));
xfs_bmbt_log_ptrs(cur, bp, 1, be16_to_cpu(cblock->bb_numrecs));
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*logflags |=
XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork);
*stat = 1;
return 0;
}
/*
* Set all the fields in a bmap extent record from the uncompressed form.
*/
void
xfs_bmbt_set_all(
xfs_bmbt_rec_t *r,
xfs_bmbt_irec_t *s)
{
int extent_flag;
ASSERT((s->br_state == XFS_EXT_NORM) ||
(s->br_state == XFS_EXT_UNWRITTEN));
extent_flag = (s->br_state == XFS_EXT_NORM) ? 0 : 1;
ASSERT((s->br_startoff & XFS_MASK64HI(9)) == 0);
ASSERT((s->br_blockcount & XFS_MASK64HI(43)) == 0);
#if XFS_BIG_BLKNOS
ASSERT((s->br_startblock & XFS_MASK64HI(12)) == 0);
r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
((xfs_bmbt_rec_base_t)s->br_startblock >> 43);
r->l1 = ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
((xfs_bmbt_rec_base_t)s->br_blockcount &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
#else /* !XFS_BIG_BLKNOS */
if (ISNULLSTARTBLOCK(s->br_startblock)) {
r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
(xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
r->l1 = XFS_MASK64HI(11) |
((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
((xfs_bmbt_rec_base_t)s->br_blockcount &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
} else {
r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)s->br_startoff << 9);
r->l1 = ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
((xfs_bmbt_rec_base_t)s->br_blockcount &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
}
#endif /* XFS_BIG_BLKNOS */
}
/*
* Set all the fields in a bmap extent record from the arguments.
*/
void
xfs_bmbt_set_allf(
xfs_bmbt_rec_t *r,
xfs_fileoff_t o,
xfs_fsblock_t b,
xfs_filblks_t c,
xfs_exntst_t v)
{
int extent_flag;
ASSERT((v == XFS_EXT_NORM) || (v == XFS_EXT_UNWRITTEN));
extent_flag = (v == XFS_EXT_NORM) ? 0 : 1;
ASSERT((o & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
ASSERT((c & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
#if XFS_BIG_BLKNOS
ASSERT((b & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)o << 9) |
((xfs_bmbt_rec_base_t)b >> 43);
r->l1 = ((xfs_bmbt_rec_base_t)b << 21) |
((xfs_bmbt_rec_base_t)c &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
#else /* !XFS_BIG_BLKNOS */
if (ISNULLSTARTBLOCK(b)) {
r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)o << 9) |
(xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
r->l1 = XFS_MASK64HI(11) |
((xfs_bmbt_rec_base_t)b << 21) |
((xfs_bmbt_rec_base_t)c &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
} else {
r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)o << 9);
r->l1 = ((xfs_bmbt_rec_base_t)b << 21) |
((xfs_bmbt_rec_base_t)c &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
}
#endif /* XFS_BIG_BLKNOS */
}
#ifndef XFS_NATIVE_HOST
/*
* Set all the fields in a bmap extent record from the uncompressed form.
*/
void
xfs_bmbt_disk_set_all(
xfs_bmbt_rec_t *r,
xfs_bmbt_irec_t *s)
{
int extent_flag;
ASSERT((s->br_state == XFS_EXT_NORM) ||
(s->br_state == XFS_EXT_UNWRITTEN));
extent_flag = (s->br_state == XFS_EXT_NORM) ? 0 : 1;
ASSERT((s->br_startoff & XFS_MASK64HI(9)) == 0);
ASSERT((s->br_blockcount & XFS_MASK64HI(43)) == 0);
#if XFS_BIG_BLKNOS
ASSERT((s->br_startblock & XFS_MASK64HI(12)) == 0);
INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
((xfs_bmbt_rec_base_t)s->br_startblock >> 43));
INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
((xfs_bmbt_rec_base_t)s->br_blockcount &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
#else /* !XFS_BIG_BLKNOS */
if (ISNULLSTARTBLOCK(s->br_startblock)) {
INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
(xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
INT_SET(r->l1, ARCH_CONVERT, XFS_MASK64HI(11) |
((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
((xfs_bmbt_rec_base_t)s->br_blockcount &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
} else {
INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)s->br_startoff << 9));
INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
((xfs_bmbt_rec_base_t)s->br_blockcount &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
}
#endif /* XFS_BIG_BLKNOS */
}
/*
* Set all the fields in a disk format bmap extent record from the arguments.
*/
void
xfs_bmbt_disk_set_allf(
xfs_bmbt_rec_t *r,
xfs_fileoff_t o,
xfs_fsblock_t b,
xfs_filblks_t c,
xfs_exntst_t v)
{
int extent_flag;
ASSERT((v == XFS_EXT_NORM) || (v == XFS_EXT_UNWRITTEN));
extent_flag = (v == XFS_EXT_NORM) ? 0 : 1;
ASSERT((o & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
ASSERT((c & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
#if XFS_BIG_BLKNOS
ASSERT((b & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)o << 9) |
((xfs_bmbt_rec_base_t)b >> 43));
INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)b << 21) |
((xfs_bmbt_rec_base_t)c &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
#else /* !XFS_BIG_BLKNOS */
if (ISNULLSTARTBLOCK(b)) {
INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)o << 9) |
(xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
INT_SET(r->l1, ARCH_CONVERT, XFS_MASK64HI(11) |
((xfs_bmbt_rec_base_t)b << 21) |
((xfs_bmbt_rec_base_t)c &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
} else {
INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
((xfs_bmbt_rec_base_t)o << 9));
INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)b << 21) |
((xfs_bmbt_rec_base_t)c &
(xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
}
#endif /* XFS_BIG_BLKNOS */
}
#endif /* XFS_NATIVE_HOST */
/*
* Set the blockcount field in a bmap extent record.
*/
void
xfs_bmbt_set_blockcount(
xfs_bmbt_rec_t *r,
xfs_filblks_t v)
{
ASSERT((v & XFS_MASK64HI(43)) == 0);
r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) |
(xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21));
}
/*
* Set the startblock field in a bmap extent record.
*/
void
xfs_bmbt_set_startblock(
xfs_bmbt_rec_t *r,
xfs_fsblock_t v)
{
#if XFS_BIG_BLKNOS
ASSERT((v & XFS_MASK64HI(12)) == 0);
r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(55)) |
(xfs_bmbt_rec_base_t)(v >> 43);
r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)) |
(xfs_bmbt_rec_base_t)(v << 21);
#else /* !XFS_BIG_BLKNOS */
if (ISNULLSTARTBLOCK(v)) {
r->l0 |= (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
r->l1 = (xfs_bmbt_rec_base_t)XFS_MASK64HI(11) |
((xfs_bmbt_rec_base_t)v << 21) |
(r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
} else {
r->l0 &= ~(xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
r->l1 = ((xfs_bmbt_rec_base_t)v << 21) |
(r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
}
#endif /* XFS_BIG_BLKNOS */
}
/*
* Set the startoff field in a bmap extent record.
*/
void
xfs_bmbt_set_startoff(
xfs_bmbt_rec_t *r,
xfs_fileoff_t v)
{
ASSERT((v & XFS_MASK64HI(9)) == 0);
r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) XFS_MASK64HI(1)) |
((xfs_bmbt_rec_base_t)v << 9) |
(r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
}
/*
* Set the extent state field in a bmap extent record.
*/
void
xfs_bmbt_set_state(
xfs_bmbt_rec_t *r,
xfs_exntst_t v)
{
ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN);
if (v == XFS_EXT_NORM)
r->l0 &= XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN);
else
r->l0 |= XFS_MASK64HI(BMBT_EXNTFLAG_BITLEN);
}
/*
* Convert in-memory form of btree root to on-disk form.
*/
void
xfs_bmbt_to_bmdr(
xfs_bmbt_block_t *rblock,
int rblocklen,
xfs_bmdr_block_t *dblock,
int dblocklen)
{
int dmxr;
xfs_bmbt_key_t *fkp;
xfs_bmbt_ptr_t *fpp;
xfs_bmbt_key_t *tkp;
xfs_bmbt_ptr_t *tpp;
ASSERT(be32_to_cpu(rblock->bb_magic) == XFS_BMAP_MAGIC);
ASSERT(be64_to_cpu(rblock->bb_leftsib) == NULLDFSBNO);
ASSERT(be64_to_cpu(rblock->bb_rightsib) == NULLDFSBNO);
ASSERT(be16_to_cpu(rblock->bb_level) > 0);
dblock->bb_level = rblock->bb_level;
dblock->bb_numrecs = rblock->bb_numrecs;
dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0);
fkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen);
tkp = XFS_BTREE_KEY_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
fpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen);
tpp = XFS_BTREE_PTR_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
dmxr = be16_to_cpu(dblock->bb_numrecs);
memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
memcpy(tpp, fpp, sizeof(*fpp) * dmxr); /* INT_: direct copy */
}
/*
* Update the record to the passed values.
*/
int
xfs_bmbt_update(
xfs_btree_cur_t *cur,
xfs_fileoff_t off,
xfs_fsblock_t bno,
xfs_filblks_t len,
xfs_exntst_t state)
{
xfs_bmbt_block_t *block;
xfs_buf_t *bp;
int error;
#ifdef XFS_BMBT_TRACE
static char fname[] = "xfs_bmbt_update";
#endif
xfs_bmbt_key_t key;
int ptr;
xfs_bmbt_rec_t *rp;
XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
XFS_BMBT_TRACE_ARGFFFI(cur, (xfs_dfiloff_t)off, (xfs_dfsbno_t)bno,
(xfs_dfilblks_t)len, (int)state);
block = xfs_bmbt_get_block(cur, 0, &bp);
#ifdef DEBUG
if ((error = xfs_btree_check_lblock(cur, block, 0, bp))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
#endif
ptr = cur->bc_ptrs[0];
rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
xfs_bmbt_disk_set_allf(rp, off, bno, len, state);
xfs_bmbt_log_recs(cur, bp, ptr, ptr);
if (ptr > 1) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
return 0;
}
INT_SET(key.br_startoff, ARCH_CONVERT, off);
if ((error = xfs_bmbt_updkey(cur, &key, 1))) {
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
return 0;
}
/*
* Check extent records, which have just been read, for
* any bit in the extent flag field. ASSERT on debug
* kernels, as this condition should not occur.
* Return an error condition (1) if any flags found,
* otherwise return 0.
*/
int
xfs_check_nostate_extents(
xfs_ifork_t *ifp,
xfs_extnum_t idx,
xfs_extnum_t num)
{
xfs_bmbt_rec_t *ep;
for (; num > 0; num--, idx++) {
ep = xfs_iext_get_ext(ifp, idx);
if ((ep->l0 >>
(64 - BMBT_EXNTFLAG_BITLEN)) != 0) {
ASSERT(0);
return 1;
}
}
return 0;
}
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