File: [Development] / xfs-linux-nodel / xfs_bmap_btree.c (download)
Revision 1.65, Thu May 18 21:27:02 1995 UTC (22 years, 5 months ago) by doucette
Branch: MAIN
Changes since 1.64: +96 -71
lines
Split new root code out from xfs_bmbt_insrec to xfs_bmbt_newroot,
so xfs_bmap_add_attrfork can call it too.
|
#ident "$Revision: 1.63 $"
#ifdef SIM
#define _KERNEL 1
#endif
#include <sys/param.h>
#ifdef SIM
#undef _KERNEL
#endif
#include <sys/vnode.h>
#include <sys/debug.h>
#include <sys/kmem.h>
#include <sys/errno.h>
#include <stddef.h>
#ifdef SIM
#include <bstring.h>
#else
#include <sys/systm.h>
#endif
#include "xfs_types.h"
#include "xfs_inum.h"
#ifdef SIM
#define _KERNEL 1
#endif
#include <sys/buf.h>
#include <sys/grio.h>
#include <sys/ktrace.h>
#include <sys/sysinfo.h>
#include <sys/ksa.h>
#ifdef SIM
#undef _KERNEL
#endif
#include "xfs_log.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_mount.h"
#include "xfs_alloc_btree.h"
#include "xfs_bmap_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_btree.h"
#include "xfs_ialloc.h"
#include "xfs_itable.h"
#include "xfs_attr_sf.h"
#include "xfs_dir_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode_item.h"
#include "xfs_inode.h"
#include "xfs_alloc.h"
#include "xfs_bit.h"
#include "xfs_bmap.h"
#ifdef SIM
#include "sim.h"
#endif
#if !defined(SIM) || !defined(XFSDEBUG)
#define kmem_check() /* dummy for memory-allocation checking */
#endif
ktrace_t *xfs_bmbt_trace_buf;
/*
* Prototypes for internal btree functions.
*/
#ifdef XFSDEBUG
STATIC void
xfs_bmbt_kcheck_body(
xfs_btree_cur_t *cur,
xfs_bmbt_block_t *block,
int level,
xfs_bmbt_key_t *keyp);
STATIC void
xfs_bmbt_kcheck_btree(
xfs_btree_cur_t *cur,
xfs_fsblock_t bno,
int level,
xfs_bmbt_key_t *kp);
STATIC xfs_fsblock_t
xfs_bmbt_rcheck_body(
xfs_btree_cur_t *cur,
xfs_bmbt_block_t *block,
xfs_fsblock_t *fbno,
void *rec,
int level);
STATIC xfs_fsblock_t
xfs_bmbt_rcheck_btree(
xfs_btree_cur_t *cur,
xfs_fsblock_t bno,
xfs_fsblock_t *fbno,
void *rec,
int level);
#endif /* XFSDEBUG */
/*
* Delete record pointed to by cur/level.
*/
STATIC int
xfs_bmbt_delrec(
xfs_btree_cur_t *cur,
int level,
int *stat);
#if 0
/*
* Get the data from the pointed-to record.
*/
STATIC int
xfs_bmbt_get_rec(
xfs_btree_cur_t *cur,
xfs_fileoff_t *off,
xfs_fsblock_t *bno,
xfs_filblks_t *len);
#endif
/*
* Insert one record/level. Return information to the caller
* allowing the next level up to proceed if necessary.
*/
STATIC int
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);
STATIC int
xfs_bmbt_killroot(
xfs_btree_cur_t *cur);
/*
* Log key values from the btree block.
*/
STATIC void
xfs_bmbt_log_keys(
xfs_btree_cur_t *cur,
buf_t *bp,
int kfirst,
int klast);
/*
* Log pointer values from the btree block.
*/
STATIC void
xfs_bmbt_log_ptrs(
xfs_btree_cur_t *cur,
buf_t *bp,
int pfirst,
int plast);
/*
* Lookup the record. The cursor is made to point to it, based on dir.
*/
STATIC int
xfs_bmbt_lookup(
xfs_btree_cur_t *cur,
xfs_lookup_t dir,
int *stat);
/*
* Move 1 record left from cur/level if possible.
* Update cur to reflect the new path.
*/
STATIC int
xfs_bmbt_lshift(
xfs_btree_cur_t *cur,
int level,
int *stat);
/*
* Move 1 record right from cur/level if possible.
* Update cur to reflect the new path.
*/
STATIC int
xfs_bmbt_rshift(
xfs_btree_cur_t *cur,
int level,
int *stat);
/*
* Split cur/level block in half.
* Return new block number and its first record (to be inserted into parent).
*/
STATIC int
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);
#if defined(DEBUG) && !defined(SIM)
/*
* Add a trace buffer entry for arguments, for a buffer & 1 integer arg.
*/
STATIC void
xfs_bmbt_trace_argbi(
char *name,
xfs_btree_cur_t *cur,
buf_t *b,
int i);
/*
* Add a trace buffer entry for arguments, for a buffer & 2 integer args.
*/
STATIC void
xfs_bmbt_trace_argbii(
char *name,
xfs_btree_cur_t *cur,
buf_t *b,
int i0,
int i1);
/*
* Add a trace buffer entry for arguments, for 3 block-length args.
*/
STATIC void
xfs_bmbt_trace_argfff(
char *name,
xfs_btree_cur_t *cur,
xfs_dfiloff_t o,
xfs_dfsbno_t b,
xfs_dfilblks_t i);
/*
* Add a trace buffer entry for arguments, for one integer arg.
*/
STATIC void
xfs_bmbt_trace_argi(
char *name,
xfs_btree_cur_t *cur,
int i);
/*
* Add a trace buffer entry for arguments, for int, fsblock, key.
*/
STATIC void
xfs_bmbt_trace_argifk(
char *name,
xfs_btree_cur_t *cur,
int i,
xfs_fsblock_t f,
xfs_bmbt_key_t *k);
/*
* Add a trace buffer entry for arguments, for int, fsblock, rec.
*/
STATIC void
xfs_bmbt_trace_argifr(
char *name,
xfs_btree_cur_t *cur,
int i,
xfs_fsblock_t f,
xfs_bmbt_rec_t *r);
/*
* Add a trace buffer entry for arguments, for int, key.
*/
STATIC void
xfs_bmbt_trace_argik(
char *name,
xfs_btree_cur_t *cur,
int i,
xfs_bmbt_key_t *k);
/*
* Add a trace buffer entry for the cursor/operation.
*/
STATIC void
xfs_bmbt_trace_cursor(
char *name,
xfs_btree_cur_t *cur);
/*
* Add a trace buffer entry for the arguments given to the routine,
* generic form.
*/
STATIC void
xfs_bmbt_trace_enter(
char *name,
xfs_btree_cur_t *cur,
int type,
__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,
__psunsigned_t a11);
#else
#define xfs_bmbt_trace_argbi(n,c,b,i)
#define xfs_bmbt_trace_argbii(n,c,b,i,j)
#define xfs_bmbt_trace_argfff(n,c,o,b,i)
#define xfs_bmbt_trace_argi(n,c,i)
#define xfs_bmbt_trace_argifk(n,c,i,f,k)
#define xfs_bmbt_trace_argifr(n,c,i,f,r)
#define xfs_bmbt_trace_argik(n,c,i,k)
#define xfs_bmbt_trace_cursor(n,c)
#endif /* DEBUG && !SIM */
/*
* Update keys for the record.
*/
STATIC void
xfs_bmbt_updkey(
xfs_btree_cur_t *cur,
xfs_bmbt_key_t *keyp,
int level);
/*
* 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 */
buf_t *bp; /* buffer for block */
int error;
int i; /* loop counter */
int j; /* temp state */
xfs_bmbt_key_t key; /* bmap btree key */
xfs_bmbt_key_t *kp; /* pointer to bmap btree key */
xfs_fsblock_t lbno; /* left sibling block number */
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; /* 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 */
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 */
buf_t *rrbp; /* right-right buffer pointer */
int rrecs; /* right record count */
xfs_bmbt_rec_t *rrp; /* right record pointer */
xfs_btree_cur_t *tcur; /* temporary btree cursor */
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_delrec entry", cur);
xfs_bmbt_trace_argi("xfs_bmbt_delrec args", cur, level);
ptr = cur->bc_ptrs[level];
if (ptr == 0) {
xfs_bmbt_trace_cursor("xfs_bmbt_delrec exit0", cur);
*stat = 0;
return 0;
}
block = xfs_bmbt_get_block(cur, level, &bp);
xfs_btree_check_lblock(cur, block, level);
if (ptr > block->bb_numrecs) {
xfs_bmbt_trace_cursor("xfs_bmbt_delrec exit1", cur);
*stat = 0;
return 0;
}
XFSSTATS.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 < block->bb_numrecs; i++)
xfs_btree_check_lptr(cur, pp[i], level);
#endif
if (ptr < block->bb_numrecs) {
ovbcopy(&kp[ptr], &kp[ptr - 1],
(block->bb_numrecs - ptr) * sizeof(*kp));
ovbcopy(&pp[ptr], &pp[ptr - 1],
(block->bb_numrecs - ptr) * sizeof(*pp));
xfs_bmbt_log_ptrs(cur, bp, ptr, block->bb_numrecs - 1);
xfs_bmbt_log_keys(cur, bp, ptr, block->bb_numrecs - 1);
}
} else {
rp = XFS_BMAP_REC_IADDR(block, 1, cur);
if (ptr < block->bb_numrecs) {
ovbcopy(&rp[ptr], &rp[ptr - 1],
(block->bb_numrecs - ptr) * sizeof(*rp));
xfs_bmbt_log_recs(cur, bp, ptr, block->bb_numrecs - 1);
}
if (ptr == 1) {
key.br_startoff = xfs_bmbt_get_startoff(rp);
kp = &key;
}
}
block->bb_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);
i = xfs_bmbt_killroot(cur);
if (level > 0) {
error = xfs_bmbt_decrement(cur, level, &j);
if (error) {
return error;
}
}
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_delrec exit2", cur);
*stat = i;
return 0;
}
if (ptr == 1)
xfs_bmbt_updkey(cur, kp, level + 1);
if (block->bb_numrecs >= XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
if (level > 0) {
error = xfs_bmbt_decrement(cur, level, &j);
if (error) {
return error;
}
}
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_delrec exit3", cur);
*stat = 1;
return 0;
}
rbno = block->bb_rightsib;
lbno = 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) {
i = xfs_bmbt_killroot(cur);
if (level > 0) {
error = xfs_bmbt_decrement(cur, level, &j);
if (error) {
return error;
}
}
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_delrec exit4", cur);
*stat = i;
return 0;
}
ASSERT(rbno != NULLFSBLOCK || lbno != NULLFSBLOCK);
tcur = xfs_btree_dup_cursor(cur);
bno = NULLFSBLOCK;
if (rbno != NULLFSBLOCK) {
xfs_btree_lastrec(tcur, level);
error = xfs_bmbt_increment(tcur, level, &i);
if (error) {
goto error0;
}
xfs_btree_lastrec(tcur, level);
rbp = tcur->bc_bufs[level];
right = XFS_BUF_TO_BMBT_BLOCK(rbp);
xfs_btree_check_lblock(cur, right, level);
bno = right->bb_leftsib;
if (right->bb_numrecs - 1 >=
XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
error = xfs_bmbt_lshift(tcur, level, &i);
if (error) {
goto error0;
}
if (i) {
ASSERT(block->bb_numrecs >=
XFS_BMAP_BLOCK_IMINRECS(level, tcur));
xfs_btree_del_cursor(tcur);
if (level > 0) {
error = xfs_bmbt_decrement(cur,
level, &i);
if (error) {
return error;
}
}
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_delrec exit5",
cur);
*stat = 1;
return 0;
}
}
rrecs = right->bb_numrecs;
if (lbno != NULLFSBLOCK) {
xfs_btree_firstrec(tcur, level);
error = xfs_bmbt_decrement(tcur, level, &i);
if (error) {
goto error0;
}
}
}
if (lbno != NULLFSBLOCK) {
xfs_btree_firstrec(tcur, level);
error = xfs_bmbt_decrement(tcur, level, &i); /* to last */
if (error) {
goto error0;
}
xfs_btree_firstrec(tcur, level);
lbp = tcur->bc_bufs[level];
left = XFS_BUF_TO_BMBT_BLOCK(lbp);
xfs_btree_check_lblock(cur, left, level);
bno = left->bb_rightsib;
if (left->bb_numrecs - 1 >=
XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
error = xfs_bmbt_rshift(tcur, level, &i);
if (error) {
goto error0;
}
if (i) {
ASSERT(block->bb_numrecs >=
XFS_BMAP_BLOCK_IMINRECS(level, tcur));
xfs_btree_del_cursor(tcur);
if (level == 0)
cur->bc_ptrs[0]++;
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_delrec exit6",
cur);
*stat = 1;
return 0;
}
}
lrecs = left->bb_numrecs;
}
xfs_btree_del_cursor(tcur);
mp = cur->bc_mp;
ASSERT(bno != NULLFSBLOCK);
if (lbno != NULLFSBLOCK &&
lrecs + block->bb_numrecs <= XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
rbno = bno;
right = block;
rbp = bp;
error = xfs_btree_read_bufl(mp, cur->bc_tp, lbno, 0, &lbp);
if (error) {
return error;
}
left = XFS_BUF_TO_BMBT_BLOCK(lbp);
xfs_btree_check_lblock(cur, left, level);
} else if (rbno != NULLFSBLOCK &&
rrecs + block->bb_numrecs <=
XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
lbno = bno;
left = block;
lbp = bp;
error = xfs_btree_read_bufl(mp, cur->bc_tp, rbno, 0, &rbp);
if (error) {
return error;
}
right = XFS_BUF_TO_BMBT_BLOCK(rbp);
lrecs = left->bb_numrecs;
xfs_btree_check_lblock(cur, right, level);
} else {
if (level > 0) {
error = xfs_bmbt_decrement(cur, level, &i);
if (error) {
return error;
}
}
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_delrec exit7", cur);
*stat = 1;
return 0;
}
if (level > 0) {
lkp = XFS_BMAP_KEY_IADDR(left, left->bb_numrecs + 1, cur);
lpp = XFS_BMAP_PTR_IADDR(left, left->bb_numrecs + 1, cur);
rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
#ifdef DEBUG
for (i = 0; i < right->bb_numrecs; i++)
xfs_btree_check_lptr(cur, rpp[i], level);
#endif
bcopy(rkp, lkp, right->bb_numrecs * sizeof(*lkp));
bcopy(rpp, lpp, right->bb_numrecs * sizeof(*lpp));
xfs_bmbt_log_keys(cur, lbp, left->bb_numrecs + 1,
left->bb_numrecs + right->bb_numrecs);
xfs_bmbt_log_ptrs(cur, lbp, left->bb_numrecs + 1,
left->bb_numrecs + right->bb_numrecs);
} else {
lrp = XFS_BMAP_REC_IADDR(left, left->bb_numrecs + 1, cur);
rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
bcopy(rrp, lrp, right->bb_numrecs * sizeof(*lrp));
xfs_bmbt_log_recs(cur, lbp, left->bb_numrecs + 1,
left->bb_numrecs + right->bb_numrecs);
}
left->bb_numrecs += right->bb_numrecs;
left->bb_rightsib = right->bb_rightsib;
xfs_bmbt_log_block(cur, lbp, XFS_BB_RIGHTSIB | XFS_BB_NUMRECS);
if (left->bb_rightsib != NULLDFSBNO) {
error = xfs_btree_read_bufl(mp, cur->bc_tp, left->bb_rightsib,
0, &rrbp);
if (error) {
return error;
}
rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
xfs_btree_check_lblock(cur, rrblock, level);
rrblock->bb_leftsib = lbno;
xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
}
xfs_bmap_add_free(XFS_DADDR_TO_FSB(mp, rbp->b_blkno), 1,
cur->bc_private.b.flist, mp);
xfs_trans_set_sync(cur->bc_tp);
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_binval(cur->bc_tp, rbp);
if (bp != lbp) {
cur->bc_bufs[level] = lbp;
cur->bc_ptrs[level] += lrecs;
} else {
error = xfs_bmbt_increment(cur, level + 1, &i);
if (error) {
return error;
}
}
if (level > 0)
cur->bc_ptrs[level]--;
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_delrec exit8", cur);
*stat = 2;
return 0;
error0:
xfs_btree_del_cursor(tcur);
return error;
}
#if 0
/*
* Get the data from the pointed-to record.
*/
STATIC int
xfs_bmbt_get_rec(
xfs_btree_cur_t *cur,
xfs_fileoff_t *off,
xfs_fsblock_t *bno,
xfs_filblks_t *len)
{
xfs_bmbt_block_t *block;
buf_t *bp;
int ptr;
xfs_bmbt_rec_t *rp;
block = xfs_bmbt_get_block(cur, 0, &bp);
ptr = cur->bc_ptrs[0];
xfs_btree_check_lblock(cur, block, 0);
if (ptr > block->bb_numrecs || ptr <= 0)
return 0;
rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
*off = xfs_bmbt_get_startoff(rp);
*bno = xfs_bmbt_get_startblock(rp);
*len = xfs_bmbt_get_blockcount(rp);
return 1;
}
#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 */
buf_t *bp; /* buffer for block */
int error;
int i; /* loop index */
xfs_bmbt_key_t key; /* bmap btree key */
xfs_bmbt_key_t *kp; /* 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; /* pointer to bmap btree rec */
ASSERT(level < cur->bc_nlevels);
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_insrec entry", cur);
xfs_bmbt_trace_argifr("xfs_bmbt_insrec args", cur, level, *bnop, recp);
ncur = (xfs_btree_cur_t *)0;
key.br_startoff = xfs_bmbt_get_startoff(recp);
optr = ptr = cur->bc_ptrs[level];
if (ptr == 0) {
xfs_bmbt_trace_cursor("xfs_bmbt_insrec exit0", cur);
*stat = 0;
return 0;
}
XFSSTATS.xs_bmbt_insrec++;
block = xfs_bmbt_get_block(cur, level, &bp);
xfs_btree_check_lblock(cur, block, level);
#ifdef DEBUG
if (ptr <= block->bb_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 (block->bb_numrecs == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
if (block->bb_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, stat, &logflags)) ||
*stat == 0)
return error;
xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip,
logflags);
block = xfs_bmbt_get_block(cur, level, &bp);
} else {
error = xfs_bmbt_rshift(cur, level, &i);
if (error) {
return error;
}
if (i) {
/* nothing */
} else {
error = xfs_bmbt_lshift(cur, level, &i);
if (error) {
return error;
}
if (i) {
optr = ptr = cur->bc_ptrs[level];
} else {
error = xfs_bmbt_split(cur, level,
&nbno, &nkey, &ncur, &i);
if (error) {
return error;
}
if (i) {
block = xfs_bmbt_get_block(
cur, level, &bp);
xfs_btree_check_lblock(cur,
block, level);
ptr = cur->bc_ptrs[level];
xfs_bmbt_set_startoff(&nrec,
nkey.br_startoff);
xfs_bmbt_set_startblock(
&nrec, 0);
xfs_bmbt_set_blockcount(
&nrec, 0);
} else {
xfs_bmbt_trace_cursor(
"xfs_bmbt_insrec exit2",
cur);
*stat = 0;
return 0;
}
}
}
}
}
if (level > 0) {
kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
#ifdef DEBUG
for (i = block->bb_numrecs; i >= ptr; i--)
xfs_btree_check_lptr(cur, pp[i - 1], level);
#endif
ovbcopy(&kp[ptr - 1], &kp[ptr],
(block->bb_numrecs - ptr + 1) * sizeof(*kp));
ovbcopy(&pp[ptr - 1], &pp[ptr],
(block->bb_numrecs - ptr + 1) * sizeof(*pp));
xfs_btree_check_lptr(cur, (xfs_bmbt_ptr_t)*bnop, level);
kp[ptr - 1] = key;
pp[ptr - 1] = *bnop;
block->bb_numrecs++;
xfs_bmbt_log_keys(cur, bp, ptr, block->bb_numrecs);
xfs_bmbt_log_ptrs(cur, bp, ptr, block->bb_numrecs);
} else {
rp = XFS_BMAP_REC_IADDR(block, 1, cur);
ovbcopy(&rp[ptr - 1], &rp[ptr],
(block->bb_numrecs - ptr + 1) * sizeof(*rp));
rp[ptr - 1] = *recp;
block->bb_numrecs++;
xfs_bmbt_log_recs(cur, bp, ptr, block->bb_numrecs);
}
xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
#ifdef DEBUG
if (ptr < block->bb_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)
xfs_bmbt_updkey(cur, &key, level + 1);
*bnop = nbno;
xfs_bmbt_rcheck(cur);
if (nbno != NULLFSBLOCK) {
*recp = nrec;
*curp = ncur;
} else
xfs_bmbt_kcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_insrec exit3", cur);
*stat = 1;
return 0;
}
#ifdef XFSDEBUG
STATIC void
xfs_bmbt_kcheck_body(
xfs_btree_cur_t *cur,
xfs_bmbt_block_t *block,
int level,
xfs_bmbt_key_t *keyp)
{
int i;
xfs_bmbt_key_t key;
xfs_bmbt_key_t *kp;
xfs_bmbt_ptr_t *pp;
xfs_bmbt_rec_t *rp;
xfs_btree_check_lblock(cur, block, level);
if (level > 0) {
kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
if (keyp)
key = *kp;
} else {
rp = XFS_BMAP_REC_IADDR(block, 1, cur);
if (keyp)
key.br_startoff = xfs_bmbt_get_startoff(rp);
}
if (keyp)
ASSERT(bcmp(keyp, &key, sizeof(key)) == 0);
if (level > 0) {
pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
if (*pp != NULLFSBLOCK) {
for (i = 1; i <= block->bb_numrecs; i++, pp++, kp++)
xfs_bmbt_kcheck_btree(cur, *pp, level - 1, kp);
}
}
}
STATIC void
xfs_bmbt_kcheck_btree(
xfs_btree_cur_t *cur,
xfs_fsblock_t bno,
int level,
xfs_bmbt_key_t *kp)
{
xfs_bmbt_block_t *block;
buf_t *bp;
xfs_trans_t *tp;
ASSERT(bno != NULLFSBLOCK);
tp = cur->bc_tp;
bp = xfs_btree_read_bufl(cur->bc_mp, tp, bno, 0);
block = XFS_BUF_TO_BMBT_BLOCK(bp);
xfs_bmbt_kcheck_body(cur, block, level, kp);
xfs_trans_brelse(tp, bp);
}
#endif
STATIC int
xfs_bmbt_killroot(
xfs_btree_cur_t *cur)
{
xfs_bmbt_block_t *block;
xfs_bmbt_block_t *cblock;
buf_t *cbp;
xfs_bmbt_key_t *ckp;
xfs_bmbt_ptr_t *cpp;
int i;
xfs_bmbt_key_t *kp;
xfs_inode_t *ip;
int level;
xfs_bmbt_ptr_t *pp;
xfs_bmbt_trace_cursor("xfs_bmbt_killroot entry", cur);
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("xfs_bmbt_killroot exit0", cur);
return 1;
}
block = xfs_bmbt_get_block(cur, level, &cbp);
/*
* Give up if the root has multiple children.
*/
if (block->bb_numrecs != 1) {
xfs_bmbt_trace_cursor("xfs_bmbt_killroot exit1", cur);
return 1;
}
/*
* 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 (cblock->bb_numrecs > XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
xfs_bmbt_trace_cursor("xfs_bmbt_killroot exit2", cur);
return 1;
}
ASSERT(cblock->bb_leftsib == NULLDFSBNO);
ASSERT(cblock->bb_rightsib == NULLDFSBNO);
ip = cur->bc_private.b.ip;
ASSERT(XFS_BMAP_BLOCK_IMAXRECS(level, cur) ==
XFS_BMAP_BROOT_MAXRECS(ip->i_df.if_broot_bytes));
i = (int)(cblock->bb_numrecs - XFS_BMAP_BLOCK_IMAXRECS(level, cur));
if (i) {
xfs_iroot_realloc(ip, i, cur->bc_private.b.whichfork);
block = ip->i_df.if_broot;
}
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);
bcopy(ckp, kp, 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 < cblock->bb_numrecs; i++)
xfs_btree_check_lptr(cur, cpp[i], level - 1);
#endif
bcopy(cpp, pp, block->bb_numrecs * sizeof(*pp));
xfs_bmap_add_free(XFS_DADDR_TO_FSB(cur->bc_mp, cbp->b_blkno), 1,
cur->bc_private.b.flist, cur->bc_mp);
xfs_trans_set_sync(cur->bc_tp);
ip->i_d.di_nblocks--;
xfs_trans_binval(cur->bc_tp, cbp);
cur->bc_bufs[level - 1] = NULL;
block->bb_level--;
xfs_trans_log_inode(cur->bc_tp, ip,
XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
cur->bc_nlevels--;
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_killroot exit3", cur);
return 1;
}
/*
* Log key values from the btree block.
*/
STATIC void
xfs_bmbt_log_keys(
xfs_btree_cur_t *cur,
buf_t *bp,
int kfirst,
int klast)
{
xfs_trans_t *tp;
xfs_bmbt_trace_cursor("xfs_bmbt_log_keys entry", cur);
xfs_bmbt_trace_argbii("xfs_bmbt_log_keys args", cur, bp, kfirst, klast);
tp = cur->bc_tp;
if (bp) {
xfs_bmbt_block_t *block;
int first;
int last;
xfs_bmbt_key_t *kp;
block = XFS_BUF_TO_BMBT_BLOCK(bp);
kp = XFS_BMAP_KEY_DADDR(block, 1, cur);
first = (caddr_t)&kp[kfirst - 1] - (caddr_t)block;
last = ((caddr_t)&kp[klast] - 1) - (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("xfs_bmbt_log_keys exit", cur);
}
/*
* Log pointer values from the btree block.
*/
STATIC void
xfs_bmbt_log_ptrs(
xfs_btree_cur_t *cur,
buf_t *bp,
int pfirst,
int plast)
{
xfs_trans_t *tp;
xfs_bmbt_trace_cursor("xfs_bmbt_log_ptrs entry", cur);
xfs_bmbt_trace_argbii("xfs_bmbt_log_ptrs args", 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 = (caddr_t)&pp[pfirst - 1] - (caddr_t)block;
last = ((caddr_t)&pp[plast] - 1) - (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("xfs_bmbt_log_ptrs exit", cur);
}
/*
* 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;
buf_t *bp;
daddr_t d;
int diff;
int error;
xfs_fsblock_t fsbno;
int high;
int i;
int keyno;
xfs_bmbt_key_t *kkbase;
xfs_bmbt_key_t *kkp;
xfs_bmbt_rec_t *krbase;
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;
XFSSTATS.xs_bmbt_lookup++;
xfs_bmbt_rcheck(cur);
xfs_bmbt_kcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_lookup entry", cur);
xfs_bmbt_trace_argi("xfs_bmbt_lookup args", 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 && bp->b_blkno != d)
bp = (buf_t *)0;
if (!bp) {
error = xfs_trans_read_buf(tp, mp->m_dev, d,
mp->m_bsize, 0, &bp);
if (error) {
return error;
}
ASSERT(bp);
ASSERT(!geterror(bp));
/*
* Validate the magic number in the block.
*/
block = XFS_BUF_TO_BMBT_BLOCK(bp);
if (block->bb_magic !=
xfs_magics[cur->bc_btnum]) {
bp->b_flags |= B_ERROR;
xfs_trans_brelse(tp, bp);
return EIO;
}
xfs_btree_setbuf(cur, level, bp);
bp->b_ref = XFS_BMAP_BTREE_REF;
}
ASSERT(cur->bc_bufs[level]);
}
block = xfs_bmbt_get_block(cur, level, &bp);
xfs_btree_check_lblock(cur, block, level);
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 = block->bb_numrecs)) {
ASSERT(level == 0);
cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE;
xfs_bmbt_trace_cursor("xfs_bmbt_lookup exit0",
cur);
*stat = 0;
return 0;
}
while (low <= high) {
XFSSTATS.xs_bmbt_compare++;
keyno = (low + high) >> 1;
if (level > 0) {
kkp = kkbase + keyno - 1;
startoff = kkp->br_startoff;
} else {
krp = krbase + keyno - 1;
startoff = xfs_bmbt_get_startoff(krp);
}
diff = (int)(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);
xfs_btree_check_lptr(cur, *pp, level);
fsbno = *pp;
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 > block->bb_numrecs &&
block->bb_rightsib != NULLDFSBNO) {
cur->bc_ptrs[0] = keyno;
error = xfs_bmbt_increment(cur, 0, &i);
if (error) {
return error;
}
ASSERT(i == 1);
xfs_bmbt_trace_cursor("xfs_bmbt_lookup exit1", cur);
*stat = 1;
return 0;
}
}
else if (dir == XFS_LOOKUP_LE && diff > 0)
keyno--;
cur->bc_ptrs[0] = keyno;
if (keyno == 0 || keyno > block->bb_numrecs) {
xfs_bmbt_trace_cursor("xfs_bmbt_lookup exit2", cur);
*stat = 0;
} else {
xfs_bmbt_trace_cursor("xfs_bmbt_lookup exit3", cur);
*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;
#ifdef DEBUG
int i; /* loop counter */
#endif
xfs_bmbt_key_t key; /* bmap btree key */
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; /* left record count */
xfs_bmbt_rec_t *lrp; /* left record pointer */
xfs_mount_t *mp; /* file system mount point */
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; /* right record pointer */
xfs_bmbt_trace_cursor("xfs_bmbt_lshift entry", cur);
xfs_bmbt_trace_argi("xfs_bmbt_lshift args", cur, level);
if (level == cur->bc_nlevels - 1) {
xfs_bmbt_trace_cursor("xfs_bmbt_lshift exit0", cur);
*stat = 0;
return 0;
}
xfs_bmbt_rcheck(cur);
rbp = cur->bc_bufs[level];
right = XFS_BUF_TO_BMBT_BLOCK(rbp);
xfs_btree_check_lblock(cur, right, level);
if (right->bb_leftsib == NULLDFSBNO) {
xfs_bmbt_trace_cursor("xfs_bmbt_lshift exit1", cur);
*stat = 0;
return 0;
}
if (cur->bc_ptrs[level] <= 1) {
xfs_bmbt_trace_cursor("xfs_bmbt_lshift exit2", cur);
*stat = 0;
return 0;
}
mp = cur->bc_mp;
error = xfs_btree_read_bufl(mp, cur->bc_tp, right->bb_leftsib,
0, &lbp);
if (error) {
return error;
}
left = XFS_BUF_TO_BMBT_BLOCK(lbp);
xfs_btree_check_lblock(cur, left, level);
if (left->bb_numrecs == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
xfs_bmbt_trace_cursor("xfs_bmbt_lshift exit3", cur);
*stat = 0;
return 0;
}
lrecs = left->bb_numrecs + 1;
if (level > 0) {
lkp = XFS_BMAP_KEY_IADDR(left, left->bb_numrecs + 1, 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, left->bb_numrecs + 1, cur);
rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
xfs_btree_check_lptr(cur, *rpp, level);
*lpp = *rpp;
xfs_bmbt_log_ptrs(cur, lbp, lrecs, lrecs);
} else {
lrp = XFS_BMAP_REC_IADDR(left, left->bb_numrecs + 1, cur);
rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
*lrp = *rrp;
xfs_bmbt_log_recs(cur, lbp, lrecs, lrecs);
}
left->bb_numrecs++;
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
right->bb_numrecs--;
xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
if (level > 0) {
#ifdef DEBUG
for (i = 0; i < right->bb_numrecs; i++)
xfs_btree_check_lptr(cur, rpp[i + 1], level);
#endif
ovbcopy(rkp + 1, rkp, right->bb_numrecs * sizeof(*rkp));
ovbcopy(rpp + 1, rpp, right->bb_numrecs * sizeof(*rpp));
xfs_bmbt_log_keys(cur, rbp, 1, right->bb_numrecs);
xfs_bmbt_log_ptrs(cur, rbp, 1, right->bb_numrecs);
} else {
ovbcopy(rrp + 1, rrp, right->bb_numrecs * sizeof(*rrp));
xfs_bmbt_log_recs(cur, rbp, 1, right->bb_numrecs);
key.br_startoff = xfs_bmbt_get_startoff(rrp);
rkp = &key;
}
xfs_bmbt_updkey(cur, rkp, level + 1);
cur->bc_ptrs[level]--;
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_lshift exit4", cur);
*stat = 1;
return 0;
}
#ifdef XFSDEBUG
STATIC xfs_fsblock_t
xfs_bmbt_rcheck_body(
xfs_btree_cur_t *cur,
xfs_bmbt_block_t *block,
xfs_fsblock_t *fbno,
void *rec,
int level)
{
int i;
xfs_bmbt_key_t *keyp;
xfs_bmbt_key_t *kp;
xfs_bmbt_ptr_t *pp;
xfs_fsblock_t rbno;
xfs_bmbt_rec_t *recp;
xfs_bmbt_rec_t *rp;
xfs_btree_check_lblock(cur, block, level);
if (fbno && block->bb_numrecs) {
if (level > 0) {
pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
xfs_btree_check_lptr(cur, *pp, level);
*fbno = *pp;
} else
*fbno = NULLFSBLOCK;
}
rbno = block->bb_rightsib;
if (level > 0)
keyp = (xfs_bmbt_key_t *)rec;
else
recp = (xfs_bmbt_rec_t *)rec;
for (i = 1; i <= block->bb_numrecs; i++) {
if (level > 0) {
kp = XFS_BMAP_KEY_IADDR(block, i, cur);
if (i == 1 && !fbno)
xfs_btree_check_key(XFS_BTNUM_BMAP, (void *)keyp, (void *)kp);
else if (i > 1) {
xfs_btree_check_key(XFS_BTNUM_BMAP, (void *)(kp - 1), (void *)kp);
if (i == block->bb_numrecs)
*keyp = *kp;
}
pp = XFS_BMAP_PTR_IADDR(block, i, cur);
xfs_btree_check_lptr(cur, *pp, level);
} else {
rp = XFS_BMAP_REC_IADDR(block, i, cur);
if (i == 1 && !fbno)
xfs_btree_check_rec(XFS_BTNUM_BMAP, (void *)recp, (void *)rp);
else if (i > 1) {
xfs_btree_check_rec(XFS_BTNUM_BMAP, (void *)(rp - 1), (void *)rp);
if (i == block->bb_numrecs)
*recp = *rp;
}
}
}
return rbno;
}
STATIC xfs_fsblock_t
xfs_bmbt_rcheck_btree(
xfs_btree_cur_t *cur,
xfs_fsblock_t bno,
xfs_fsblock_t *fbno,
void *rec,
int level)
{
xfs_bmbt_block_t *block;
buf_t *bp;
xfs_fsblock_t rval;
xfs_trans_t *tp;
tp = cur->bc_tp;
bp = xfs_btree_read_bufl(cur->bc_mp, tp, bno, 0);
block = XFS_BUF_TO_BMBT_BLOCK(bp);
rval = xfs_bmbt_rcheck_body(cur, block, fbno, rec, level);
xfs_trans_brelse(tp, bp);
return rval;
}
#endif
/*
* Read in the allocation group header (free/alloc section)
*/
int /* error */
xfs_bmbt_read_agf(
xfs_mount_t *mp,
xfs_trans_t *tp,
xfs_agnumber_t agno,
buf_t **bpp)
{
buf_t *bp; /* return value */
daddr_t d; /* disk block address */
int error;
xfs_agf_t *agf;
ASSERT(agno != NULLAGNUMBER);
d = XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR);
error = xfs_trans_read_buf(tp, mp->m_dev, d, 1, 0, &bp);
if (error) {
return error;
}
ASSERT(bp);
ASSERT(!geterror(bp));
/*
* Validate the magic number of the agf block.
*/
agf = XFS_BUF_TO_AGF(bp);
if ((agf->agf_magicnum != XFS_AGF_MAGIC) ||
(agf->agf_versionnum != XFS_AGF_VERSION)) {
bp->b_flags |= B_ERROR;
xfs_trans_brelse(tp, bp);
return EIO;
}
bp->b_ref = XFS_AGF_REF;
*bpp = bp;
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;
int i; /* loop counter */
xfs_bmbt_key_t key; /* bmap btree key */
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 */
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; /* right record pointer */
struct xfs_btree_cur *tcur; /* temporary btree cursor */
xfs_bmbt_trace_cursor("xfs_bmbt_rshift entry", cur);
xfs_bmbt_trace_argi("xfs_bmbt_rshift args", cur, level);
if (level == cur->bc_nlevels - 1) {
xfs_bmbt_trace_cursor("xfs_bmbt_rshift exit0", cur);
*stat = 0;
return 0;
}
xfs_bmbt_rcheck(cur);
lbp = cur->bc_bufs[level];
left = XFS_BUF_TO_BMBT_BLOCK(lbp);
xfs_btree_check_lblock(cur, left, level);
if (left->bb_rightsib == NULLDFSBNO) {
xfs_bmbt_trace_cursor("xfs_bmbt_rshift exit1", cur);
*stat = 0;
return 0;
}
if (cur->bc_ptrs[level] >= left->bb_numrecs) {
xfs_bmbt_trace_cursor("xfs_bmbt_rshift exit2", cur);
*stat = 0;
return 0;
}
mp = cur->bc_mp;
error = xfs_btree_read_bufl(mp, cur->bc_tp, left->bb_rightsib, 0, &rbp);
if (error) {
return error;
}
right = XFS_BUF_TO_BMBT_BLOCK(rbp);
xfs_btree_check_lblock(cur, right, level);
if (right->bb_numrecs == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
xfs_bmbt_trace_cursor("xfs_bmbt_rshift exit3", cur);
*stat = 0;
return 0;
}
if (level > 0) {
lkp = XFS_BMAP_KEY_IADDR(left, left->bb_numrecs, cur);
lpp = XFS_BMAP_PTR_IADDR(left, left->bb_numrecs, cur);
rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
#ifdef DEBUG
for (i = right->bb_numrecs - 1; i >= 0; i--)
xfs_btree_check_lptr(cur, rpp[i], level);
#endif
ovbcopy(rkp, rkp + 1, right->bb_numrecs * sizeof(*rkp));
ovbcopy(rpp, rpp + 1, right->bb_numrecs * sizeof(*rpp));
xfs_btree_check_lptr(cur, *lpp, level);
*rkp = *lkp;
*rpp = *lpp;
xfs_bmbt_log_keys(cur, rbp, 1, right->bb_numrecs + 1);
xfs_bmbt_log_ptrs(cur, rbp, 1, right->bb_numrecs + 1);
} else {
lrp = XFS_BMAP_REC_IADDR(left, left->bb_numrecs, cur);
rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
ovbcopy(rrp, rrp + 1, right->bb_numrecs * sizeof(*rrp));
*rrp = *lrp;
xfs_bmbt_log_recs(cur, rbp, 1, right->bb_numrecs + 1);
key.br_startoff = xfs_bmbt_get_startoff(rrp);
rkp = &key;
}
left->bb_numrecs--;
xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
right->bb_numrecs++;
#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);
tcur = xfs_btree_dup_cursor(cur);
xfs_btree_lastrec(tcur, level);
error = xfs_bmbt_increment(tcur, level, &i);
if (error) {
xfs_btree_del_cursor(tcur);
return error;
}
xfs_bmbt_updkey(tcur, rkp, level + 1);
xfs_btree_del_cursor(tcur);
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_rshift exit4", cur);
*stat = 1;
return 0;
}
/*
* 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;
int i; /* loop counter */
xfs_fsblock_t lbno; /* left sibling block number */
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 */
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 */
buf_t *rrbp; /* right-right buffer pointer */
xfs_bmbt_rec_t *rrp; /* right record pointer */
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_split entry", cur);
xfs_bmbt_trace_argifk("xfs_bmbt_split args", 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, lbp->b_blkno);
left = XFS_BUF_TO_BMBT_BLOCK(lbp);
args.fsbno = cur->bc_private.b.firstblock;
if (args.fsbno == NULLFSBLOCK) {
args.fsbno = lbno;
args.type = XFS_ALLOCTYPE_START_BNO;
} else if (cur->bc_private.b.flags & XFS_BTCUR_BPRV_LOWSPC)
args.type = XFS_ALLOCTYPE_FIRST_AG;
else
args.type = XFS_ALLOCTYPE_NEAR_BNO;
args.mod = args.minleft = args.total = args.isfl = args.userdata = 0;
args.minlen = args.maxlen = args.prod = 1;
args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
error = xfs_alloc_vextent(&args);
if (error) {
return error;
}
if (args.fsbno == NULLFSBLOCK) {
xfs_bmbt_trace_cursor("xfs_bmbt_split exit0", cur);
*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);
rbp = xfs_btree_get_bufl(args.mp, args.tp, args.fsbno, 0);
right = XFS_BUF_TO_BMBT_BLOCK(rbp);
xfs_btree_check_lblock(cur, left, level);
right->bb_magic = XFS_BMAP_MAGIC;
right->bb_level = left->bb_level;
right->bb_numrecs = (__uint16_t)(left->bb_numrecs / 2);
if ((left->bb_numrecs & 1) && cur->bc_ptrs[level] <= right->bb_numrecs + 1)
right->bb_numrecs++;
i = left->bb_numrecs - 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 < right->bb_numrecs; i++)
xfs_btree_check_lptr(cur, lpp[i], level);
#endif
bcopy(lkp, rkp, right->bb_numrecs * sizeof(*rkp));
bcopy(lpp, rpp, right->bb_numrecs * sizeof(*rpp));
xfs_bmbt_log_keys(cur, rbp, 1, right->bb_numrecs);
xfs_bmbt_log_ptrs(cur, rbp, 1, right->bb_numrecs);
*keyp = *rkp;
} else {
lrp = XFS_BMAP_REC_IADDR(left, i, cur);
rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
bcopy(lrp, rrp, right->bb_numrecs * sizeof(*rrp));
xfs_bmbt_log_recs(cur, rbp, 1, right->bb_numrecs);
keyp->br_startoff = xfs_bmbt_get_startoff(rrp);
}
left->bb_numrecs -= right->bb_numrecs;
right->bb_rightsib = left->bb_rightsib;
left->bb_rightsib = args.fsbno;
right->bb_leftsib = lbno;
xfs_bmbt_log_block(cur, rbp, XFS_BB_ALL_BITS);
xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
if (right->bb_rightsib != NULLDFSBNO) {
error = xfs_btree_read_bufl(args.mp, args.tp,
right->bb_rightsib, 0, &rrbp);
if (error) {
return error;
}
rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
xfs_btree_check_lblock(cur, rrblock, level);
rrblock->bb_leftsib = args.fsbno;
xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
}
if (cur->bc_ptrs[level] > left->bb_numrecs + 1) {
xfs_btree_setbuf(cur, level, rbp);
cur->bc_ptrs[level] -= left->bb_numrecs;
}
if (level + 1 < cur->bc_nlevels) {
*curp = xfs_btree_dup_cursor(cur);
(*curp)->bc_ptrs[level + 1]++;
}
*bnop = args.fsbno;
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_split exit1", cur);
*stat = 1;
return 0;
}
#if defined(DEBUG) && !defined(SIM)
/*
* Add a trace buffer entry for arguments, for a buffer & 1 integer arg.
*/
STATIC void
xfs_bmbt_trace_argbi(
char *name,
xfs_btree_cur_t *cur,
buf_t *b,
int i)
{
xfs_bmbt_trace_enter(name, cur, XFS_BMBT_KTRACE_ARGBI,
(__psunsigned_t)b, i, 0, 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 *name,
xfs_btree_cur_t *cur,
buf_t *b,
int i0,
int i1)
{
xfs_bmbt_trace_enter(name, cur, XFS_BMBT_KTRACE_ARGBII,
(__psunsigned_t)b, i0, i1, 0,
0, 0, 0, 0,
0, 0, 0, 0);
}
/*
* Add a trace buffer entry for arguments, for 3 block-length args.
*/
STATIC void
xfs_bmbt_trace_argfff(
char *name,
xfs_btree_cur_t *cur,
xfs_dfiloff_t o,
xfs_dfsbno_t b,
xfs_dfilblks_t i)
{
xfs_bmbt_trace_enter(name, cur, XFS_BMBT_KTRACE_ARGFFF,
o >> 32, (int)o, b >> 32, (int)b,
i >> 32, (int)i, 0, 0,
0, 0, 0, 0);
}
/*
* Add a trace buffer entry for arguments, for one integer arg.
*/
STATIC void
xfs_bmbt_trace_argi(
char *name,
xfs_btree_cur_t *cur,
int i)
{
xfs_bmbt_trace_enter(name, cur, XFS_BMBT_KTRACE_ARGI,
i, 0, 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 *name,
xfs_btree_cur_t *cur,
int i,
xfs_fsblock_t f,
xfs_bmbt_key_t *k)
{
xfs_dfsbno_t d;
xfs_dfiloff_t o;
d = (xfs_dfsbno_t)f;
o = k->br_startoff;
xfs_bmbt_trace_enter(name, cur, XFS_BMBT_KTRACE_ARGIFK,
i, d >> 32, (int)d, o >> 32,
(int)o, 0, 0, 0,
0, 0, 0, 0);
}
/*
* Add a trace buffer entry for arguments, for int, fsblock, rec.
*/
STATIC void
xfs_bmbt_trace_argifr(
char *name,
xfs_btree_cur_t *cur,
int i,
xfs_fsblock_t f,
xfs_bmbt_rec_t *r)
{
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_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(name, cur, XFS_BMBT_KTRACE_ARGIFR,
i, d >> 32, (int)d, o >> 32,
(int)o, b >> 32, (int)b, c >> 32,
(int)c, 0, 0, 0);
}
/*
* Add a trace buffer entry for arguments, for int, key.
*/
STATIC void
xfs_bmbt_trace_argik(
char *name,
xfs_btree_cur_t *cur,
int i,
xfs_bmbt_key_t *k)
{
xfs_dfiloff_t o;
o = k->br_startoff;
xfs_bmbt_trace_enter(name, cur, XFS_BMBT_KTRACE_ARGIFK,
i, o >> 32, (int)o, 0,
0, 0, 0, 0,
0, 0, 0, 0);
}
/*
* Add a trace buffer entry for the cursor/operation.
*/
STATIC void
xfs_bmbt_trace_cursor(
char *name,
xfs_btree_cur_t *cur)
{
xfs_bmbt_rec_t r;
xfs_bmbt_set_all(&r, &cur->bc_rec.b);
xfs_bmbt_trace_enter(name, cur, XFS_BMBT_KTRACE_CUR,
(cur->bc_nlevels << 16) | cur->bc_private.b.flags,
cur->bc_private.b.allocated,
#if BMBT_USE_64
r.l0 >> 32, (int)r.l0, r.l1 >> 32, (int)r.l1,
#else
r.l0, r.l1, r.l2, r.l3,
#endif
(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]);
}
/*
* Add a trace buffer entry for the arguments given to the routine,
* generic form.
*/
STATIC void
xfs_bmbt_trace_enter(
char *name,
xfs_btree_cur_t *cur,
int type,
__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,
__psunsigned_t a11)
{
xfs_inode_t *ip;
ip = cur->bc_private.b.ip;
ktrace_enter(xfs_bmbt_trace_buf,
(void *)((__psunsigned_t)type),
(void *)name, (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, (void *)a11);
ASSERT(ip->i_btrace);
ktrace_enter(ip->i_btrace,
(void *)((__psunsigned_t)type),
(void *)name, (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, (void *)a11);
}
#endif /* DEBUG && !SIM */
/*
* Update keys for the record.
*/
STATIC void
xfs_bmbt_updkey(
xfs_btree_cur_t *cur,
xfs_bmbt_key_t *keyp,
int level)
{
xfs_bmbt_block_t *block;
buf_t *bp;
xfs_bmbt_key_t *kp;
int ptr;
ASSERT(level >= 1);
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_updkey entry", cur);
xfs_bmbt_trace_argik("xfs_bmbt_updkey args", cur, level, keyp);
for (ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
block = xfs_bmbt_get_block(cur, level, &bp);
xfs_btree_check_lblock(cur, block, level);
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_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_updkey exit", cur);
}
/*
* 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 = XFS_BMAP_MAGIC;
rblock->bb_level = dblock->bb_level;
ASSERT(rblock->bb_level > 0);
rblock->bb_numrecs = dblock->bb_numrecs;
rblock->bb_leftsib = rblock->bb_rightsib = NULLDFSBNO;
dmxr = 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);
bcopy(fkp, tkp, sizeof(*fkp) * dblock->bb_numrecs);
bcopy(fpp, tpp, sizeof(*fpp) * dblock->bb_numrecs);
}
/*
* 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;
buf_t *bp;
int error;
xfs_fsblock_t fsbno;
int lev;
xfs_mount_t *mp;
xfs_bmbt_ptr_t *pp;
xfs_trans_t *tp;
xfs_bmbt_trace_cursor("xfs_bmbt_decrement entry", cur);
xfs_bmbt_trace_argi("xfs_bmbt_decrement entry", cur, level);
if (--cur->bc_ptrs[level] > 0) {
xfs_bmbt_trace_cursor("xfs_bmbt_decrement exit0", cur);
*stat = 1;
return 0;
}
block = xfs_bmbt_get_block(cur, level, &bp);
xfs_btree_check_lblock(cur, block, level);
if (block->bb_leftsib == NULLDFSBNO) {
xfs_bmbt_trace_cursor("xfs_bmbt_decrement exit1", cur);
*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) {
xfs_bmbt_trace_cursor("xfs_bmbt_decrement exit2", cur);
*stat = 0;
return 0;
}
tp = cur->bc_tp;
mp = cur->bc_mp;
for (; lev > level; lev--) {
block = xfs_bmbt_get_block(cur, lev, &bp);
xfs_btree_check_lblock(cur, block, lev);
pp = XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur);
xfs_btree_check_lptr(cur, *pp, lev);
fsbno = *pp;
error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp);
if (error) {
return error;
}
xfs_btree_setbuf(cur, lev - 1, bp);
block = XFS_BUF_TO_BMBT_BLOCK(bp);
xfs_btree_check_lblock(cur, block, lev - 1);
cur->bc_ptrs[lev - 1] = block->bb_numrecs;
}
xfs_bmbt_trace_cursor("xfs_bmbt_decrement exit3", cur);
*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;
int i;
int level;
xfs_bmbt_trace_cursor("xfs_bmbt_delete entry", cur);
for (level = 0, i = 2; i == 2; level++) {
error = xfs_bmbt_delrec(cur, level, &i);
if (error) {
return error;
}
}
if (i == 0) {
for (level = 1; level < cur->bc_nlevels; level++) {
if (cur->bc_ptrs[level] == 0) {
error = xfs_bmbt_decrement(cur, level, &i);
if (error) {
return error;
}
break;
}
}
}
xfs_bmbt_kcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_delete exit", cur);
*stat = i;
return 0;
}
/*
* Convert a compressed bmap extent record to an uncompressed form.
* This code must be in sync with the three routines xfs_bmbt_get_startoff,
* xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount.
*/
void
xfs_bmbt_get_all(
xfs_bmbt_rec_t *r,
xfs_bmbt_irec_t *s)
{
#if BMBT_USE_64
#if XFS_BIG_FILES
s->br_startoff = ((xfs_fileoff_t)r->l0) >> 9;
#else /* !XFS_BIG_FILES */
{
xfs_dfiloff_t o;
o = ((xfs_dfiloff_t)r->l0) >> 9;
ASSERT((o >> 32) == 0);
s->br_startoff = (xfs_fileoff_t)o;
}
#endif /* XFS_BIG_FILES */
#if XFS_BIG_FILESYSTEMS
s->br_startblock = (((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));
s->br_startblock = (xfs_fsblock_t)b;
}
#else /* !DEBUG */
s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21);
#endif /* DEBUG */
#endif /* XFS_BIG_FILESYSTEMS */
s->br_blockcount = (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21));
#else /* !BMBT_USE_64 */
#if XFS_BIG_FILES
s->br_startoff = (((xfs_fileoff_t)r->l0) << 23) |
(((xfs_fileoff_t)r->l1) >> 9);
#else /* !XFS_BIG_FILES */
#ifdef DEBUG
{
xfs_dfiloff_t o;
o = (((xfs_dfiloff_t)r->l0) << 23) |
(((xfs_dfiloff_t)r->l1) >> 9);
ASSERT((o >> 32) == 0);
s->br_startoff = (xfs_fileoff_t)o;
}
#else /* !DEBUG */
s->br_startoff = (((xfs_fileoff_t)r->l0) << 23) |
(((xfs_fileoff_t)r->l1) >> 9);
#endif /* DEBUG */
#endif /* XFS_BIG_FILES */
#if XFS_BIG_FILESYSTEMS
s->br_startblock =
(((xfs_fsblock_t)(r->l1 & XFS_MASK32LO(9))) << 43) |
(((xfs_fsblock_t)r->l2) << 11) |
(((xfs_fsblock_t)r->l3) >> 21);
#else
#ifdef DEBUG
{
xfs_dfsbno_t b;
b = (((xfs_dfsbno_t)(r->l1 & XFS_MASK32LO(9))) << 43) |
(((xfs_dfsbno_t)r->l2) << 11) |
(((xfs_dfsbno_t)r->l3) >> 21);
ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
s->br_startblock = (xfs_fsblock_t)b;
}
#else /* !DEBUG */
s->br_startblock = (((xfs_fsblock_t)r->l2) << 11) |
(((xfs_fsblock_t)r->l3) >> 21);
#endif /* DEBUG */
#endif /* XFS_BIG_FILESYSTEMS */
s->br_blockcount = (xfs_filblks_t)(r->l3 & XFS_MASK32LO(21));
#endif /* BMBT_USE_64 */
}
/*
* 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,
buf_t **bpp)
{
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 = 0;
rval = cur->bc_private.b.ip->i_df.if_broot;
}
return rval;
}
/*
* Extract the blockcount field from a bmap extent record.
*/
xfs_filblks_t
xfs_bmbt_get_blockcount(
xfs_bmbt_rec_t *r)
{
#if BMBT_USE_64
return (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21));
#else /* !BMBT_USE_64 */
return (xfs_filblks_t)(r->l3 & XFS_MASK32LO(21));
#endif /* BMBT_USE_64 */
}
/*
* Extract the startblock field from a bmap extent record.
*/
xfs_fsblock_t
xfs_bmbt_get_startblock(
xfs_bmbt_rec_t *r)
{
#if BMBT_USE_64
#if XFS_BIG_FILESYSTEMS
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_FILESYSTEMS */
#else /* !BMBT_USE_64 */
#if XFS_BIG_FILESYSTEMS
return (((xfs_fsblock_t)(r->l1 & XFS_MASK32LO(9))) << 43) |
(((xfs_fsblock_t)r->l2) << 11) |
(((xfs_fsblock_t)r->l3) >> 21);
#else
#ifdef DEBUG
xfs_dfsbno_t b;
b = (((xfs_dfsbno_t)(r->l1 & XFS_MASK32LO(9))) << 43) |
(((xfs_dfsbno_t)r->l2) << 11) |
(((xfs_dfsbno_t)r->l3) >> 21);
ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
return (xfs_fsblock_t)b;
#else /* !DEBUG */
return (((xfs_fsblock_t)r->l2) << 11) |
(((xfs_fsblock_t)r->l3) >> 21);
#endif /* DEBUG */
#endif /* XFS_BIG_FILESYSTEMS */
#endif /* BMBT_USE_64 */
}
/*
* Extract the startoff field from a bmap extent record.
*/
xfs_fileoff_t
xfs_bmbt_get_startoff(
xfs_bmbt_rec_t *r)
{
#if BMBT_USE_64
#if XFS_BIG_FILES
return ((xfs_fileoff_t)r->l0) >> 9;
#else /* !XFS_BIG_FILES */
xfs_dfiloff_t o;
o = ((xfs_dfiloff_t)r->l0) >> 9;
ASSERT((o >> 32) == 0);
return (xfs_fileoff_t)o;
#endif /* XFS_BIG_FILES */
#else /* !BMBT_USE_64 */
#if XFS_BIG_FILES
return (((xfs_fileoff_t)r->l0) << 23) |
(((xfs_fileoff_t)r->l1) >> 9);
#else /* !XFS_BIG_FILES */
#ifdef DEBUG
xfs_dfiloff_t o;
o = (((xfs_dfiloff_t)r->l0) << 23) | (((xfs_dfiloff_t)r->l1) >> 9);
ASSERT((o >> 32) == 0);
return (xfs_fileoff_t)o;
#else /* !DEBUG */
return (((xfs_fileoff_t)r->l0) << 23) |
(((xfs_fileoff_t)r->l1) >> 9);
#endif /* DEBUG */
#endif /* XFS_BIG_FILES */
#endif /* BMBT_USE_64 */
}
/*
* 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;
buf_t *bp;
int error;
xfs_fsblock_t fsbno;
int lev;
xfs_mount_t *mp;
xfs_bmbt_ptr_t *pp;
xfs_trans_t *tp;
xfs_bmbt_trace_cursor("xfs_bmbt_increment entry", cur);
xfs_bmbt_trace_argi("xfs_bmbt_increment args", cur, level);
block = xfs_bmbt_get_block(cur, level, &bp);
xfs_btree_check_lblock(cur, block, level);
if (++cur->bc_ptrs[level] <= block->bb_numrecs) {
xfs_bmbt_trace_cursor("xfs_bmbt_increment exit0", cur);
*stat = 1;
return 0;
}
if (block->bb_rightsib == NULLDFSBNO) {
xfs_bmbt_trace_cursor("xfs_bmbt_increment exit1", cur);
*stat = 0;
return 0;
}
for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
block = xfs_bmbt_get_block(cur, lev, &bp);
xfs_btree_check_lblock(cur, block, lev);
if (++cur->bc_ptrs[lev] <= block->bb_numrecs)
break;
}
if (lev == cur->bc_nlevels) {
xfs_bmbt_trace_cursor("xfs_bmbt_increment exit2", cur);
*stat = 0;
return 0;
}
tp = cur->bc_tp;
mp = cur->bc_mp;
for (; lev > level; lev--) {
block = xfs_bmbt_get_block(cur, lev, &bp);
xfs_btree_check_lblock(cur, block, lev);
pp = XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur);
xfs_btree_check_lptr(cur, *pp, lev);
fsbno = *pp;
error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp);
if (error) {
return error;
}
xfs_btree_setbuf(cur, lev - 1, bp);
cur->bc_ptrs[lev - 1] = 1;
}
xfs_bmbt_trace_cursor("xfs_bmbt_increment exit3", cur);
*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;
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("xfs_bmbt_insert entry", cur);
level = 0;
nbno = NULLFSBLOCK;
xfs_bmbt_set_all(&nrec, &cur->bc_rec.b);
ncur = (xfs_btree_cur_t *)0;
pcur = cur;
do {
error = xfs_bmbt_insrec(pcur, level++, &nbno, &nrec, &ncur, &i);
if (error) {
if (pcur != cur) {
xfs_btree_del_cursor(pcur);
}
return error;
}
ASSERT(i == 1);
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);
}
if (ncur) {
pcur = ncur;
ncur = (xfs_btree_cur_t *)0;
}
} while (nbno != NULLFSBLOCK);
xfs_bmbt_trace_cursor("xfs_bmbt_insert exit", cur);
*stat = i;
return 0;
}
#ifdef XFSDEBUG
/*
* Debug routine to check key consistency.
*/
void
xfs_bmbt_kcheck(
xfs_btree_cur_t *cur)
{
xfs_bmbt_block_t *block;
xfs_dinode_core_t *dip;
xfs_inode_t *ip;
int level;
int levels;
ip = cur->bc_private.b.ip;
dip = &ip->i_d;
ASSERT(dip->di_format == XFS_DINODE_FMT_BTREE);
block = ip->i_df.if_broot;
level = block->bb_level;
levels = level + 1;
ASSERT(levels == cur->bc_nlevels);
xfs_bmbt_kcheck_body(cur, block, level, (xfs_bmbt_key_t *)0);
}
#endif /* XFSDEBUG */
/*
* Log fields from the btree block header.
*/
void
xfs_bmbt_log_block(
xfs_btree_cur_t *cur,
buf_t *bp,
int fields)
{
int first;
int last;
xfs_trans_t *tp;
static const int 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("xfs_bmbt_log_block entry", cur);
xfs_bmbt_trace_argbi("xfs_bmbt_log_block args", 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("xfs_bmbt_log_block exit", cur);
}
/*
* Log record values from the btree block.
*/
void
xfs_bmbt_log_recs(
xfs_btree_cur_t *cur,
buf_t *bp,
int rfirst,
int rlast)
{
xfs_bmbt_block_t *block;
int first;
int last;
xfs_bmbt_rec_t *rp;
xfs_trans_t *tp;
xfs_bmbt_trace_cursor("xfs_bmbt_log_recs entry", cur);
xfs_bmbt_trace_argbii("xfs_bmbt_log_recs args", 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 = (caddr_t)&rp[rfirst - 1] - (caddr_t)block;
last = ((caddr_t)&rp[rlast] - 1) - (caddr_t)block;
xfs_trans_log_buf(tp, bp, first, last);
xfs_bmbt_trace_cursor("xfs_bmbt_log_recs exit", cur);
}
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);
}
int /* error */
xfs_bmbt_lookup_le(
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_LE, 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 */
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 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 */
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.total = args.isfl = args.userdata = 0;
args.minlen = args.maxlen = args.prod = 1;
args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
if (args.fsbno == NULLFSBLOCK) {
xfs_btree_check_lptr(cur, *pp, level);
args.fsbno = *pp;
args.type = XFS_ALLOCTYPE_START_BNO;
} else if (args.wasdel)
args.type = XFS_ALLOCTYPE_FIRST_AG;
else
args.type = XFS_ALLOCTYPE_NEAR_BNO;
error = xfs_alloc_vextent(&args);
if (error) {
return error;
}
if (args.fsbno == NULLFSBLOCK) {
xfs_bmbt_trace_cursor("xfs_bmbt_newroot exit1", cur);
*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++;
bp = xfs_btree_get_bufl(args.mp, cur->bc_tp, args.fsbno, 0);
cblock = XFS_BUF_TO_BMBT_BLOCK(bp);
*cblock = *block;
block->bb_level++;
block->bb_numrecs = 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);
bcopy(kp, ckp, cblock->bb_numrecs * sizeof(*kp));
cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
#ifdef DEBUG
for (i = 0; i < cblock->bb_numrecs; i++)
xfs_btree_check_lptr(cur, pp[i], level);
#endif
bcopy(pp, cpp, cblock->bb_numrecs * sizeof(*pp));
xfs_btree_check_lptr(cur, (xfs_bmbt_ptr_t)args.fsbno, level);
*pp = args.fsbno;
xfs_iroot_realloc(cur->bc_private.b.ip, 1 - 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, cblock->bb_numrecs);
xfs_bmbt_log_ptrs(cur, bp, 1, cblock->bb_numrecs);
*logflags |=
XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork);
*stat = 1;
return 0;
}
#ifdef XFSDEBUG
void
xfs_bmbt_rcheck(
xfs_btree_cur_t *cur)
{
xfs_bmbt_block_t *block;
xfs_fsblock_t bno;
xfs_dinode_core_t *dip;
xfs_fsblock_t fbno;
xfs_inode_t *ip;
xfs_bmbt_key_t key;
int level;
xfs_mount_t *mp;
xfs_bmbt_rec_t rec;
void *rp;
mp = cur->bc_mp;
ip = cur->bc_private.b.ip;
dip = &ip->i_d;
ASSERT(dip->di_format == XFS_DINODE_FMT_BTREE);
block = ip->i_df.if_broot;
level = cur->bc_nlevels - 1;
rp = level ? (void *)&key : (void *)&rec;
xfs_bmbt_rcheck_body(cur, block, &bno, rp, level);
for (level = block->bb_level - 1; level >= 0; level--, bno = fbno) {
rp = level ? (void *)&key : (void *)&rec;
bno = xfs_bmbt_rcheck_btree(cur, bno, &fbno, rp, level);
while (bno != NULLFSBLOCK) {
ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
bno = xfs_bmbt_rcheck_btree(cur, bno, (xfs_bmbt_ptr_t *)0, rp, level);
}
}
}
#endif /* XFSDEBUG */
/*
* 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)
{
#if XFS_BIG_FILES
ASSERT((s->br_startoff & XFS_MASK64HI(9)) == 0);
ASSERT((s->br_blockcount & XFS_MASK64HI(43)) == 0);
#else /* !XFS_BIG_FILES */
ASSERT((s->br_blockcount & XFS_MASK32HI(11)) == 0);
#endif /* XFS_BIG_FILES */
#if XFS_BIG_FILESYSTEMS
ASSERT((s->br_startblock & XFS_MASK64HI(12)) == 0);
#endif /* XFS_BIG_FILESYSTEMS */
#if BMBT_USE_64
#if XFS_BIG_FILESYSTEMS
r->l0 = ((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_FILESYSTEMS */
if (ISNULLSTARTBLOCK(s->br_startblock)) {
r->l0 = ((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)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_FILESYSTEMS */
#else /* !BMBT_USE_64 */
r->l0 = (xfs_bmbt_rec_base_t)(s->br_startoff >> 23);
r->l3 = (((xfs_bmbt_rec_base_t)s->br_startblock) << 21) |
((xfs_bmbt_rec_base_t)(s->br_blockcount & XFS_MASK32LO(21)));
#if XFS_BIG_FILESYSTEMS
r->l1 = (((xfs_bmbt_rec_base_t)s->br_startoff) << 9) |
((xfs_bmbt_rec_base_t)(s->br_startblock >> 43));
r->l2 = (xfs_bmbt_rec_base_t)(s->br_startblock >> 11);
#else /* !XFS_BIG_FILESYSTEMS */
if (ISNULLSTARTBLOCK(s->br_startblock)) {
r->l1 = (xfs_bmbt_rec_base_t)(s->br_startoff << 9) |
(xfs_bmbt_rec_base_t)XFS_MASK32LO(9);
r->l2 = (xfs_bmbt_rec_base_t)XFS_MASK32HI(11) |
(xfs_bmbt_rec_base_t)(s->br_startblock >> 11);
} else {
r->l1 = (xfs_bmbt_rec_base_t)(s->br_startoff << 9);
r->l2 = (xfs_bmbt_rec_base_t)(s->br_startblock >> 11);
}
#endif /* XFS_BIG_FILESYSTEMS */
#endif /* BMBT_USE_64 */
}
/*
* Set the blockcount field in a bmap extent record.
*/
void
xfs_bmbt_set_blockcount(
xfs_bmbt_rec_t *r,
xfs_filblks_t v)
{
#if XFS_BIG_FILES
ASSERT((v & XFS_MASK64HI(43)) == 0);
#else /* !XFS_BIG_FILES */
ASSERT((v & XFS_MASK32HI(11)) == 0);
#endif
#if BMBT_USE_64
r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) |
(xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21));
#else /* !BMBT_USE_64 */
r->l3 = (r->l3 & (xfs_bmbt_rec_base_t)XFS_MASK32HI(11)) |
((xfs_bmbt_rec_base_t)v & XFS_MASK32LO(21));
#endif /* BMBT_USE_64 */
}
/*
* 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_FILESYSTEMS
ASSERT((v & XFS_MASK64HI(12)) == 0);
#endif /* XFS_BIG_FILESYSTEMS */
#if BMBT_USE_64
#if XFS_BIG_FILESYSTEMS
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_FILESYSTEMS */
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_FILESYSTEMS */
#else /* !BMBT_USE_64 */
#if XFS_BIG_FILESYSTEMS
r->l1 = (r->l1 & XFS_MASK32HI(23)) | (xfs_bmbt_rec_base_t)(v >> 43);
r->l2 = (xfs_bmbt_rec_base_t)(v >> 11);
#else /* !XFS_BIG_FILESYSTEMS */
if (ISNULLSTARTBLOCK(v)) {
r->l1 |= XFS_MASK32LO(9);
r->l2 = XFS_MASK32HI(11) | (xfs_bmbt_rec_base_t)(v >> 11);
} else {
r->l1 &= ~XFS_MASK32LO(9);
r->l2 = (xfs_bmbt_rec_base_t)(v >> 11);
}
#endif /* XFS_BIG_FILESYSTEMS */
r->l3 = (r->l3 & XFS_MASK32LO(21)) |
(((xfs_bmbt_rec_base_t)v) << 21);
#endif /* BMBT_USE_64 */
}
/*
* Set the startoff field in a bmap extent record.
*/
void
xfs_bmbt_set_startoff(
xfs_bmbt_rec_t *r,
xfs_fileoff_t v)
{
#if XFS_BIG_FILES
ASSERT((v & XFS_MASK64HI(9)) == 0);
#endif /* XFS_BIG_FILES */
#if BMBT_USE_64
r->l0 = ((xfs_bmbt_rec_base_t)v << 9) |
(r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
#else /* !BMBT_USE_64 */
r->l0 = (xfs_bmbt_rec_base_t)(v >> 23);
r->l1 = ((xfs_bmbt_rec_base_t)v << 9) |
(r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK32LO(9));
#endif /* BMBT_USE_64 */
}
/*
* 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(rblock->bb_magic == XFS_BMAP_MAGIC);
ASSERT(rblock->bb_leftsib == NULLDFSBNO);
ASSERT(rblock->bb_rightsib == NULLDFSBNO);
ASSERT(rblock->bb_level > 0);
dblock->bb_level = rblock->bb_level;
dblock->bb_numrecs = rblock->bb_numrecs;
dmxr = 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);
bcopy(fkp, tkp, sizeof(*fkp) * dblock->bb_numrecs);
bcopy(fpp, tpp, sizeof(*fpp) * dblock->bb_numrecs);
}
/*
* 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_bmbt_block_t *block;
buf_t *bp;
xfs_bmbt_key_t key;
int ptr;
xfs_bmbt_rec_t *rp;
xfs_bmbt_rcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_update entry", cur);
xfs_bmbt_trace_argfff("xfs_bmbt_update args", cur,
(xfs_dfiloff_t)off, (xfs_dfsbno_t)bno, (xfs_dfilblks_t)len);
block = xfs_bmbt_get_block(cur, 0, &bp);
xfs_btree_check_lblock(cur, block, 0);
ptr = cur->bc_ptrs[0];
rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
xfs_bmbt_set_startoff(rp, off);
xfs_bmbt_set_startblock(rp, bno);
xfs_bmbt_set_blockcount(rp, len);
xfs_bmbt_log_recs(cur, bp, ptr, ptr);
if (ptr > 1) {
xfs_bmbt_trace_cursor("xfs_bmbt_update exit0", cur);
return 1;
}
key.br_startoff = off;
xfs_bmbt_updkey(cur, &key, 1);
xfs_bmbt_rcheck(cur);
xfs_bmbt_kcheck(cur);
xfs_bmbt_trace_cursor("xfs_bmbt_update exit1", cur);
return 1;
}
![[BACK]](/icons/back.gif){kind=icon}
Return to xfs_bmap_btree.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [Development] / xfs-linux-nodel