fs/xfs/xfs_bmap_btree.c

   1 /*
   2  * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #include "xfs.h"
  19 #include "xfs_fs.h"
  20 #include "xfs_types.h"
  21 #include "xfs_bit.h"
  22 #include "xfs_log.h"
  23 #include "xfs_inum.h"
  24 #include "xfs_trans.h"
  25 #include "xfs_sb.h"
  26 #include "xfs_ag.h"
  27 #include "xfs_dir2.h"
  28 #include "xfs_dmapi.h"
  29 #include "xfs_mount.h"
  30 #include "xfs_bmap_btree.h"
  31 #include "xfs_alloc_btree.h"
  32 #include "xfs_ialloc_btree.h"
  33 #include "xfs_dir2_sf.h"
  34 #include "xfs_attr_sf.h"
  35 #include "xfs_dinode.h"
  36 #include "xfs_inode.h"
  37 #include "xfs_inode_item.h"
  38 #include "xfs_alloc.h"
  39 #include "xfs_btree.h"
  40 #include "xfs_ialloc.h"
  41 #include "xfs_itable.h"
  42 #include "xfs_bmap.h"
  43 #include "xfs_error.h"
  44 #include "xfs_quota.h"
  45
  46 #if defined(XFS_BMBT_TRACE)
  47 ktrace_t        *xfs_bmbt_trace_buf;
  48 #endif
  49
  50 /*
  51  * Prototypes for internal btree functions.
  52  */
  53
  54
  55 STATIC int xfs_bmbt_killroot(xfs_btree_cur_t *);
  56 STATIC void xfs_bmbt_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int);
  57 STATIC void xfs_bmbt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int);
  58 STATIC int xfs_bmbt_lshift(xfs_btree_cur_t *, int, int *);
  59 STATIC int xfs_bmbt_rshift(xfs_btree_cur_t *, int, int *);
  60 STATIC int xfs_bmbt_split(xfs_btree_cur_t *, int, xfs_fsblock_t *,
  61                 __uint64_t *, xfs_btree_cur_t **, int *);
  62 STATIC int xfs_bmbt_updkey(xfs_btree_cur_t *, xfs_bmbt_key_t *, int);
  63
  64
  65 #if defined(XFS_BMBT_TRACE)
  66
  67 static char     ARGS[] = "args";
  68 static char     ENTRY[] = "entry";
  69 static char     ERROR[] = "error";
  70 #undef EXIT
  71 static char     EXIT[] = "exit";
  72
  73 /*
  74  * Add a trace buffer entry for the arguments given to the routine,
  75  * generic form.
  76  */
  77 STATIC void
  78 xfs_bmbt_trace_enter(
  79         char            *func,
  80         xfs_btree_cur_t *cur,
  81         char            *s,
  82         int             type,
  83         int             line,
  84         __psunsigned_t  a0,
  85         __psunsigned_t  a1,
  86         __psunsigned_t  a2,
  87         __psunsigned_t  a3,
  88         __psunsigned_t  a4,
  89         __psunsigned_t  a5,
  90         __psunsigned_t  a6,
  91         __psunsigned_t  a7,
  92         __psunsigned_t  a8,
  93         __psunsigned_t  a9,
  94         __psunsigned_t  a10)
  95 {
  96         xfs_inode_t     *ip;
  97         int             whichfork;
  98
  99         ip = cur->bc_private.b.ip;
 100         whichfork = cur->bc_private.b.whichfork;
 101         ktrace_enter(xfs_bmbt_trace_buf,
 102                 (void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
 103                 (void *)func, (void *)s, (void *)ip, (void *)cur,
 104                 (void *)a0, (void *)a1, (void *)a2, (void *)a3,
 105                 (void *)a4, (void *)a5, (void *)a6, (void *)a7,
 106                 (void *)a8, (void *)a9, (void *)a10);
 107         ASSERT(ip->i_btrace);
 108         ktrace_enter(ip->i_btrace,
 109                 (void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
 110                 (void *)func, (void *)s, (void *)ip, (void *)cur,
 111                 (void *)a0, (void *)a1, (void *)a2, (void *)a3,
 112                 (void *)a4, (void *)a5, (void *)a6, (void *)a7,
 113                 (void *)a8, (void *)a9, (void *)a10);
 114 }
 115 /*
 116  * Add a trace buffer entry for arguments, for a buffer & 1 integer arg.
 117  */
 118 STATIC void
 119 xfs_bmbt_trace_argbi(
 120         char            *func,
 121         xfs_btree_cur_t *cur,
 122         xfs_buf_t       *b,
 123         int             i,
 124         int             line)
 125 {
 126         xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGBI, line,
 127                 (__psunsigned_t)b, i, 0, 0,
 128                 0, 0, 0, 0,
 129                 0, 0, 0);
 130 }
 131
 132 /*
 133  * Add a trace buffer entry for arguments, for a buffer & 2 integer args.
 134  */
 135 STATIC void
 136 xfs_bmbt_trace_argbii(
 137         char            *func,
 138         xfs_btree_cur_t *cur,
 139         xfs_buf_t       *b,
 140         int             i0,
 141         int             i1,
 142         int             line)
 143 {
 144         xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGBII, line,
 145                 (__psunsigned_t)b, i0, i1, 0,
 146                 0, 0, 0, 0,
 147                 0, 0, 0);
 148 }
 149
 150 /*
 151  * Add a trace buffer entry for arguments, for 3 block-length args
 152  * and an integer arg.
 153  */
 154 STATIC void
 155 xfs_bmbt_trace_argfffi(
 156         char                    *func,
 157         xfs_btree_cur_t         *cur,
 158         xfs_dfiloff_t           o,
 159         xfs_dfsbno_t            b,
 160         xfs_dfilblks_t          i,
 161         int                     j,
 162         int                     line)
 163 {
 164         xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGFFFI, line,
 165                 o >> 32, (int)o, b >> 32, (int)b,
 166                 i >> 32, (int)i, (int)j, 0,
 167                 0, 0, 0);
 168 }
 169
 170 /*
 171  * Add a trace buffer entry for arguments, for one integer arg.
 172  */
 173 STATIC void
 174 xfs_bmbt_trace_argi(
 175         char            *func,
 176         xfs_btree_cur_t *cur,
 177         int             i,
 178         int             line)
 179 {
 180         xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGI, line,
 181                 i, 0, 0, 0,
 182                 0, 0, 0, 0,
 183                 0, 0, 0);
 184 }
 185
 186 /*
 187  * Add a trace buffer entry for arguments, for int, fsblock, key.
 188  */
 189 STATIC void
 190 xfs_bmbt_trace_argifk(
 191         char                    *func,
 192         xfs_btree_cur_t         *cur,
 193         int                     i,
 194         xfs_fsblock_t           f,
 195         xfs_dfiloff_t           o,
 196         int                     line)
 197 {
 198         xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFK, line,
 199                 i, (xfs_dfsbno_t)f >> 32, (int)f, o >> 32,
 200                 (int)o, 0, 0, 0,
 201                 0, 0, 0);
 202 }
 203
 204 /*
 205  * Add a trace buffer entry for arguments, for int, fsblock, rec.
 206  */
 207 STATIC void
 208 xfs_bmbt_trace_argifr(
 209         char                    *func,
 210         xfs_btree_cur_t         *cur,
 211         int                     i,
 212         xfs_fsblock_t           f,
 213         xfs_bmbt_rec_t          *r,
 214         int                     line)
 215 {
 216         xfs_dfsbno_t            b;
 217         xfs_dfilblks_t          c;
 218         xfs_dfsbno_t            d;
 219         xfs_dfiloff_t           o;
 220         xfs_bmbt_irec_t         s;
 221
 222         d = (xfs_dfsbno_t)f;
 223         xfs_bmbt_disk_get_all(r, &s);
 224         o = (xfs_dfiloff_t)s.br_startoff;
 225         b = (xfs_dfsbno_t)s.br_startblock;
 226         c = s.br_blockcount;
 227         xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFR, line,
 228                 i, d >> 32, (int)d, o >> 32,
 229                 (int)o, b >> 32, (int)b, c >> 32,
 230                 (int)c, 0, 0);
 231 }
 232
 233 /*
 234  * Add a trace buffer entry for arguments, for int, key.
 235  */
 236 STATIC void
 237 xfs_bmbt_trace_argik(
 238         char                    *func,
 239         xfs_btree_cur_t         *cur,
 240         int                     i,
 241         xfs_bmbt_key_t          *k,
 242         int                     line)
 243 {
 244         xfs_dfiloff_t           o;
 245
 246         o = be64_to_cpu(k->br_startoff);
 247         xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFK, line,
 248                 i, o >> 32, (int)o, 0,
 249                 0, 0, 0, 0,
 250                 0, 0, 0);
 251 }
 252
 253 /*
 254  * Add a trace buffer entry for the cursor/operation.
 255  */
 256 STATIC void
 257 xfs_bmbt_trace_cursor(
 258         char            *func,
 259         xfs_btree_cur_t *cur,
 260         char            *s,
 261         int             line)
 262 {
 263         xfs_bmbt_rec_t  r;
 264
 265         xfs_bmbt_set_all(&r, &cur->bc_rec.b);
 266         xfs_bmbt_trace_enter(func, cur, s, XFS_BMBT_KTRACE_CUR, line,
 267                 (cur->bc_nlevels << 24) | (cur->bc_private.b.flags << 16) |
 268                 cur->bc_private.b.allocated,
 269                 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),
 270                 (unsigned long)cur->bc_bufs[0], (unsigned long)cur->bc_bufs[1],
 271                 (unsigned long)cur->bc_bufs[2], (unsigned long)cur->bc_bufs[3],
 272                 (cur->bc_ptrs[0] << 16) | cur->bc_ptrs[1],
 273                 (cur->bc_ptrs[2] << 16) | cur->bc_ptrs[3]);
 274 }
 275
 276 #define XFS_BMBT_TRACE_ARGBI(c,b,i)     \
 277         xfs_bmbt_trace_argbi(fname, c, b, i, __LINE__)
 278 #define XFS_BMBT_TRACE_ARGBII(c,b,i,j)  \
 279         xfs_bmbt_trace_argbii(fname, c, b, i, j, __LINE__)
 280 #define XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j)       \
 281         xfs_bmbt_trace_argfffi(fname, c, o, b, i, j, __LINE__)
 282 #define XFS_BMBT_TRACE_ARGI(c,i)        \
 283         xfs_bmbt_trace_argi(fname, c, i, __LINE__)
 284 #define XFS_BMBT_TRACE_ARGIFK(c,i,f,s)  \
 285         xfs_bmbt_trace_argifk(fname, c, i, f, s, __LINE__)
 286 #define XFS_BMBT_TRACE_ARGIFR(c,i,f,r)  \
 287         xfs_bmbt_trace_argifr(fname, c, i, f, r, __LINE__)
 288 #define XFS_BMBT_TRACE_ARGIK(c,i,k)     \
 289         xfs_bmbt_trace_argik(fname, c, i, k, __LINE__)
 290 #define XFS_BMBT_TRACE_CURSOR(c,s)      \
 291         xfs_bmbt_trace_cursor(fname, c, s, __LINE__)
 292 #else
 293 #define XFS_BMBT_TRACE_ARGBI(c,b,i)
 294 #define XFS_BMBT_TRACE_ARGBII(c,b,i,j)
 295 #define XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j)
 296 #define XFS_BMBT_TRACE_ARGI(c,i)
 297 #define XFS_BMBT_TRACE_ARGIFK(c,i,f,s)
 298 #define XFS_BMBT_TRACE_ARGIFR(c,i,f,r)
 299 #define XFS_BMBT_TRACE_ARGIK(c,i,k)
 300 #define XFS_BMBT_TRACE_CURSOR(c,s)
 301 #endif  /* XFS_BMBT_TRACE */
 302
 303
 304 /*
 305  * Internal functions.
 306  */
 307
 308 /*
 309  * Delete record pointed to by cur/level.
 310  */
 311 STATIC int                                      /* error */
 312 xfs_bmbt_delrec(
 313         xfs_btree_cur_t         *cur,
 314         int                     level,
 315         int                     *stat)          /* success/failure */
 316 {
 317         xfs_bmbt_block_t        *block;         /* bmap btree block */
 318         xfs_fsblock_t           bno;            /* fs-relative block number */
 319         xfs_buf_t               *bp;            /* buffer for block */
 320         int                     error;          /* error return value */
 321 #ifdef XFS_BMBT_TRACE
 322         static char             fname[] = "xfs_bmbt_delrec";
 323 #endif
 324         int                     i;              /* loop counter */
 325         int                     j;              /* temp state */
 326         xfs_bmbt_key_t          key;            /* bmap btree key */
 327         xfs_bmbt_key_t          *kp=NULL;       /* pointer to bmap btree key */
 328         xfs_fsblock_t           lbno;           /* left sibling block number */
 329         xfs_buf_t               *lbp;           /* left buffer pointer */
 330         xfs_bmbt_block_t        *left;          /* left btree block */
 331         xfs_bmbt_key_t          *lkp;           /* left btree key */
 332         xfs_bmbt_ptr_t          *lpp;           /* left address pointer */
 333         int                     lrecs=0;        /* left record count */
 334         xfs_bmbt_rec_t          *lrp;           /* left record pointer */
 335         xfs_mount_t             *mp;            /* file system mount point */
 336         xfs_bmbt_ptr_t          *pp;            /* pointer to bmap block addr */
 337         int                     ptr;            /* key/record index */
 338         xfs_fsblock_t           rbno;           /* right sibling block number */
 339         xfs_buf_t               *rbp;           /* right buffer pointer */
 340         xfs_bmbt_block_t        *right;         /* right btree block */
 341         xfs_bmbt_key_t          *rkp;           /* right btree key */
 342         xfs_bmbt_rec_t          *rp;            /* pointer to bmap btree rec */
 343         xfs_bmbt_ptr_t          *rpp;           /* right address pointer */
 344         xfs_bmbt_block_t        *rrblock;       /* right-right btree block */
 345         xfs_buf_t               *rrbp;          /* right-right buffer pointer */
 346         int                     rrecs=0;        /* right record count */
 347         xfs_bmbt_rec_t          *rrp;           /* right record pointer */
 348         xfs_btree_cur_t         *tcur;          /* temporary btree cursor */
 349         int                     numrecs;        /* temporary numrec count */
 350         int                     numlrecs, numrrecs;
 351
 352         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
 353         XFS_BMBT_TRACE_ARGI(cur, level);
 354         ptr = cur->bc_ptrs[level];
 355         tcur = NULL;
 356         if (ptr == 0) {
 357                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 358                 *stat = 0;
 359                 return 0;
 360         }
 361         block = xfs_bmbt_get_block(cur, level, &bp);
 362         numrecs = be16_to_cpu(block->bb_numrecs);
 363 #ifdef DEBUG
 364         if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
 365                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 366                 goto error0;
 367         }
 368 #endif
 369         if (ptr > numrecs) {
 370                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 371                 *stat = 0;
 372                 return 0;
 373         }
 374         XFS_STATS_INC(xs_bmbt_delrec);
 375         if (level > 0) {
 376                 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
 377                 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
 378 #ifdef DEBUG
 379                 for (i = ptr; i < numrecs; i++) {
 380                         if ((error = xfs_btree_check_lptr_disk(cur, pp[i], level))) {
 381                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 382                                 goto error0;
 383                         }
 384                 }
 385 #endif
 386                 if (ptr < numrecs) {
 387                         memmove(&kp[ptr - 1], &kp[ptr],
 388                                 (numrecs - ptr) * sizeof(*kp));
 389                         memmove(&pp[ptr - 1], &pp[ptr], /* INT_: direct copy */
 390                                 (numrecs - ptr) * sizeof(*pp));
 391                         xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs - 1);
 392                         xfs_bmbt_log_keys(cur, bp, ptr, numrecs - 1);
 393                 }
 394         } else {
 395                 rp = XFS_BMAP_REC_IADDR(block, 1, cur);
 396                 if (ptr < numrecs) {
 397                         memmove(&rp[ptr - 1], &rp[ptr],
 398                                 (numrecs - ptr) * sizeof(*rp));
 399                         xfs_bmbt_log_recs(cur, bp, ptr, numrecs - 1);
 400                 }
 401                 if (ptr == 1) {
 402                         key.br_startoff =
 403                                 cpu_to_be64(xfs_bmbt_disk_get_startoff(rp));
 404                         kp = &key;
 405                 }
 406         }
 407         numrecs--;
 408         block->bb_numrecs = cpu_to_be16(numrecs);
 409         xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
 410         /*
 411          * We're at the root level.
 412          * First, shrink the root block in-memory.
 413          * Try to get rid of the next level down.
 414          * If we can't then there's nothing left to do.
 415          */
 416         if (level == cur->bc_nlevels - 1) {
 417                 xfs_iroot_realloc(cur->bc_private.b.ip, -1,
 418                         cur->bc_private.b.whichfork);
 419                 if ((error = xfs_bmbt_killroot(cur))) {
 420                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 421                         goto error0;
 422                 }
 423                 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) {
 424                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 425                         goto error0;
 426                 }
 427                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 428                 *stat = 1;
 429                 return 0;
 430         }
 431         if (ptr == 1 && (error = xfs_bmbt_updkey(cur, kp, level + 1))) {
 432                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 433                 goto error0;
 434         }
 435         if (numrecs >= XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
 436                 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) {
 437                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 438                         goto error0;
 439                 }
 440                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 441                 *stat = 1;
 442                 return 0;
 443         }
 444         rbno = be64_to_cpu(block->bb_rightsib);
 445         lbno = be64_to_cpu(block->bb_leftsib);
 446         /*
 447          * One child of root, need to get a chance to copy its contents
 448          * into the root and delete it. Can't go up to next level,
 449          * there's nothing to delete there.
 450          */
 451         if (lbno == NULLFSBLOCK && rbno == NULLFSBLOCK &&
 452             level == cur->bc_nlevels - 2) {
 453                 if ((error = xfs_bmbt_killroot(cur))) {
 454                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 455                         goto error0;
 456                 }
 457                 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) {
 458                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 459                         goto error0;
 460                 }
 461                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 462                 *stat = 1;
 463                 return 0;
 464         }
 465         ASSERT(rbno != NULLFSBLOCK || lbno != NULLFSBLOCK);
 466         if ((error = xfs_btree_dup_cursor(cur, &tcur))) {
 467                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 468                 goto error0;
 469         }
 470         bno = NULLFSBLOCK;
 471         if (rbno != NULLFSBLOCK) {
 472                 i = xfs_btree_lastrec(tcur, level);
 473                 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
 474                 if ((error = xfs_bmbt_increment(tcur, level, &i))) {
 475                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 476                         goto error0;
 477                 }
 478                 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
 479                 i = xfs_btree_lastrec(tcur, level);
 480                 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
 481                 rbp = tcur->bc_bufs[level];
 482                 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
 483 #ifdef DEBUG
 484                 if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
 485                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 486                         goto error0;
 487                 }
 488 #endif
 489                 bno = be64_to_cpu(right->bb_leftsib);
 490                 if (be16_to_cpu(right->bb_numrecs) - 1 >=
 491                     XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
 492                         if ((error = xfs_bmbt_lshift(tcur, level, &i))) {
 493                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 494                                 goto error0;
 495                         }
 496                         if (i) {
 497                                 ASSERT(be16_to_cpu(block->bb_numrecs) >=
 498                                        XFS_BMAP_BLOCK_IMINRECS(level, tcur));
 499                                 xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
 500                                 tcur = NULL;
 501                                 if (level > 0) {
 502                                         if ((error = xfs_bmbt_decrement(cur,
 503                                                         level, &i))) {
 504                                                 XFS_BMBT_TRACE_CURSOR(cur,
 505                                                         ERROR);
 506                                                 goto error0;
 507                                         }
 508                                 }
 509                                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 510                                 *stat = 1;
 511                                 return 0;
 512                         }
 513                 }
 514                 rrecs = be16_to_cpu(right->bb_numrecs);
 515                 if (lbno != NULLFSBLOCK) {
 516                         i = xfs_btree_firstrec(tcur, level);
 517                         XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
 518                         if ((error = xfs_bmbt_decrement(tcur, level, &i))) {
 519                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 520                                 goto error0;
 521                         }
 522                         XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
 523                 }
 524         }
 525         if (lbno != NULLFSBLOCK) {
 526                 i = xfs_btree_firstrec(tcur, level);
 527                 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
 528                 /*
 529                  * decrement to last in block
 530                  */
 531                 if ((error = xfs_bmbt_decrement(tcur, level, &i))) {
 532                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 533                         goto error0;
 534                 }
 535                 i = xfs_btree_firstrec(tcur, level);
 536                 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
 537                 lbp = tcur->bc_bufs[level];
 538                 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
 539 #ifdef DEBUG
 540                 if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
 541                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 542                         goto error0;
 543                 }
 544 #endif
 545                 bno = be64_to_cpu(left->bb_rightsib);
 546                 if (be16_to_cpu(left->bb_numrecs) - 1 >=
 547                     XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
 548                         if ((error = xfs_bmbt_rshift(tcur, level, &i))) {
 549                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 550                                 goto error0;
 551                         }
 552                         if (i) {
 553                                 ASSERT(be16_to_cpu(block->bb_numrecs) >=
 554                                        XFS_BMAP_BLOCK_IMINRECS(level, tcur));
 555                                 xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
 556                                 tcur = NULL;
 557                                 if (level == 0)
 558                                         cur->bc_ptrs[0]++;
 559                                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 560                                 *stat = 1;
 561                                 return 0;
 562                         }
 563                 }
 564                 lrecs = be16_to_cpu(left->bb_numrecs);
 565         }
 566         xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
 567         tcur = NULL;
 568         mp = cur->bc_mp;
 569         ASSERT(bno != NULLFSBLOCK);
 570         if (lbno != NULLFSBLOCK &&
 571             lrecs + be16_to_cpu(block->bb_numrecs) <= XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
 572                 rbno = bno;
 573                 right = block;
 574                 rbp = bp;
 575                 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, lbno, 0, &lbp,
 576                                 XFS_BMAP_BTREE_REF))) {
 577                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 578                         goto error0;
 579                 }
 580                 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
 581                 if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
 582                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 583                         goto error0;
 584                 }
 585         } else if (rbno != NULLFSBLOCK &&
 586                    rrecs + be16_to_cpu(block->bb_numrecs) <=
 587                    XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
 588                 lbno = bno;
 589                 left = block;
 590                 lbp = bp;
 591                 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, rbno, 0, &rbp,
 592                                 XFS_BMAP_BTREE_REF))) {
 593                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 594                         goto error0;
 595                 }
 596                 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
 597                 if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
 598                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 599                         goto error0;
 600                 }
 601                 lrecs = be16_to_cpu(left->bb_numrecs);
 602         } else {
 603                 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) {
 604                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 605                         goto error0;
 606                 }
 607                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 608                 *stat = 1;
 609                 return 0;
 610         }
 611         numlrecs = be16_to_cpu(left->bb_numrecs);
 612         numrrecs = be16_to_cpu(right->bb_numrecs);
 613         if (level > 0) {
 614                 lkp = XFS_BMAP_KEY_IADDR(left, numlrecs + 1, cur);
 615                 lpp = XFS_BMAP_PTR_IADDR(left, numlrecs + 1, cur);
 616                 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
 617                 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
 618 #ifdef DEBUG
 619                 for (i = 0; i < numrrecs; i++) {
 620                         if ((error = xfs_btree_check_lptr_disk(cur, rpp[i], level))) {
 621                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 622                                 goto error0;
 623                         }
 624                 }
 625 #endif
 626                 memcpy(lkp, rkp, numrrecs * sizeof(*lkp));
 627                 memcpy(lpp, rpp, numrrecs * sizeof(*lpp));
 628                 xfs_bmbt_log_keys(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
 629                 xfs_bmbt_log_ptrs(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
 630         } else {
 631                 lrp = XFS_BMAP_REC_IADDR(left, numlrecs + 1, cur);
 632                 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
 633                 memcpy(lrp, rrp, numrrecs * sizeof(*lrp));
 634                 xfs_bmbt_log_recs(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
 635         }
 636         be16_add(&left->bb_numrecs, numrrecs);
 637         left->bb_rightsib = right->bb_rightsib;
 638         xfs_bmbt_log_block(cur, lbp, XFS_BB_RIGHTSIB | XFS_BB_NUMRECS);
 639         if (be64_to_cpu(left->bb_rightsib) != NULLDFSBNO) {
 640                 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp,
 641                                 be64_to_cpu(left->bb_rightsib),
 642                                 0, &rrbp, XFS_BMAP_BTREE_REF))) {
 643                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 644                         goto error0;
 645                 }
 646                 rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
 647                 if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) {
 648                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 649                         goto error0;
 650                 }
 651                 rrblock->bb_leftsib = cpu_to_be64(lbno);
 652                 xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
 653         }
 654         xfs_bmap_add_free(XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(rbp)), 1,
 655                 cur->bc_private.b.flist, mp);
 656         cur->bc_private.b.ip->i_d.di_nblocks--;
 657         xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
 658         XFS_TRANS_MOD_DQUOT_BYINO(mp, cur->bc_tp, cur->bc_private.b.ip,
 659                         XFS_TRANS_DQ_BCOUNT, -1L);
 660         xfs_trans_binval(cur->bc_tp, rbp);
 661         if (bp != lbp) {
 662                 cur->bc_bufs[level] = lbp;
 663                 cur->bc_ptrs[level] += lrecs;
 664                 cur->bc_ra[level] = 0;
 665         } else if ((error = xfs_bmbt_increment(cur, level + 1, &i))) {
 666                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 667                 goto error0;
 668         }
 669         if (level > 0)
 670                 cur->bc_ptrs[level]--;
 671         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 672         *stat = 2;
 673         return 0;
 674
 675 error0:
 676         if (tcur)
 677                 xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
 678         return error;
 679 }
 680
 681 #ifdef DEBUG
 682 /*
 683  * Get the data from the pointed-to record.
 684  */
 685 int
 686 xfs_bmbt_get_rec(
 687         xfs_btree_cur_t         *cur,
 688         xfs_fileoff_t           *off,
 689         xfs_fsblock_t           *bno,
 690         xfs_filblks_t           *len,
 691         xfs_exntst_t            *state,
 692         int                     *stat)
 693 {
 694         xfs_bmbt_block_t        *block;
 695         xfs_buf_t               *bp;
 696 #ifdef DEBUG
 697         int                     error;
 698 #endif
 699         int                     ptr;
 700         xfs_bmbt_rec_t          *rp;
 701
 702         block = xfs_bmbt_get_block(cur, 0, &bp);
 703         ptr = cur->bc_ptrs[0];
 704 #ifdef DEBUG
 705         if ((error = xfs_btree_check_lblock(cur, block, 0, bp)))
 706                 return error;
 707 #endif
 708         if (ptr > be16_to_cpu(block->bb_numrecs) || ptr <= 0) {
 709                 *stat = 0;
 710                 return 0;
 711         }
 712         rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
 713         *off = xfs_bmbt_disk_get_startoff(rp);
 714         *bno = xfs_bmbt_disk_get_startblock(rp);
 715         *len = xfs_bmbt_disk_get_blockcount(rp);
 716         *state = xfs_bmbt_disk_get_state(rp);
 717         *stat = 1;
 718         return 0;
 719 }
 720 #endif
 721
 722 /*
 723  * Insert one record/level.  Return information to the caller
 724  * allowing the next level up to proceed if necessary.
 725  */
 726 STATIC int                                      /* error */
 727 xfs_bmbt_insrec(
 728         xfs_btree_cur_t         *cur,
 729         int                     level,
 730         xfs_fsblock_t           *bnop,
 731         xfs_bmbt_rec_t          *recp,
 732         xfs_btree_cur_t         **curp,
 733         int                     *stat)          /* no-go/done/continue */
 734 {
 735         xfs_bmbt_block_t        *block;         /* bmap btree block */
 736         xfs_buf_t               *bp;            /* buffer for block */
 737         int                     error;          /* error return value */
 738 #ifdef XFS_BMBT_TRACE
 739         static char             fname[] = "xfs_bmbt_insrec";
 740 #endif
 741         int                     i;              /* loop index */
 742         xfs_bmbt_key_t          key;            /* bmap btree key */
 743         xfs_bmbt_key_t          *kp=NULL;       /* pointer to bmap btree key */
 744         int                     logflags;       /* inode logging flags */
 745         xfs_fsblock_t           nbno;           /* new block number */
 746         struct xfs_btree_cur    *ncur;          /* new btree cursor */
 747         __uint64_t              startoff;       /* new btree key value */
 748         xfs_bmbt_rec_t          nrec;           /* new record count */
 749         int                     optr;           /* old key/record index */
 750         xfs_bmbt_ptr_t          *pp;            /* pointer to bmap block addr */
 751         int                     ptr;            /* key/record index */
 752         xfs_bmbt_rec_t          *rp=NULL;       /* pointer to bmap btree rec */
 753         int                     numrecs;
 754
 755         ASSERT(level < cur->bc_nlevels);
 756         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
 757         XFS_BMBT_TRACE_ARGIFR(cur, level, *bnop, recp);
 758         ncur = NULL;
 759         key.br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(recp));
 760         optr = ptr = cur->bc_ptrs[level];
 761         if (ptr == 0) {
 762                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 763                 *stat = 0;
 764                 return 0;
 765         }
 766         XFS_STATS_INC(xs_bmbt_insrec);
 767         block = xfs_bmbt_get_block(cur, level, &bp);
 768         numrecs = be16_to_cpu(block->bb_numrecs);
 769 #ifdef DEBUG
 770         if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
 771                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 772                 return error;
 773         }
 774         if (ptr <= numrecs) {
 775                 if (level == 0) {
 776                         rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
 777                         xfs_btree_check_rec(XFS_BTNUM_BMAP, recp, rp);
 778                 } else {
 779                         kp = XFS_BMAP_KEY_IADDR(block, ptr, cur);
 780                         xfs_btree_check_key(XFS_BTNUM_BMAP, &key, kp);
 781                 }
 782         }
 783 #endif
 784         nbno = NULLFSBLOCK;
 785         if (numrecs == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
 786                 if (numrecs < XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
 787                         /*
 788                          * A root block, that can be made bigger.
 789                          */
 790                         xfs_iroot_realloc(cur->bc_private.b.ip, 1,
 791                                 cur->bc_private.b.whichfork);
 792                         block = xfs_bmbt_get_block(cur, level, &bp);
 793                 } else if (level == cur->bc_nlevels - 1) {
 794                         if ((error = xfs_bmbt_newroot(cur, &logflags, stat)) ||
 795                             *stat == 0) {
 796                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 797                                 return error;
 798                         }
 799                         xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip,
 800                                 logflags);
 801                         block = xfs_bmbt_get_block(cur, level, &bp);
 802                 } else {
 803                         if ((error = xfs_bmbt_rshift(cur, level, &i))) {
 804                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 805                                 return error;
 806                         }
 807                         if (i) {
 808                                 /* nothing */
 809                         } else {
 810                                 if ((error = xfs_bmbt_lshift(cur, level, &i))) {
 811                                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 812                                         return error;
 813                                 }
 814                                 if (i) {
 815                                         optr = ptr = cur->bc_ptrs[level];
 816                                 } else {
 817                                         if ((error = xfs_bmbt_split(cur, level,
 818                                                         &nbno, &startoff, &ncur,
 819                                                         &i))) {
 820                                                 XFS_BMBT_TRACE_CURSOR(cur,
 821                                                         ERROR);
 822                                                 return error;
 823                                         }
 824                                         if (i) {
 825                                                 block = xfs_bmbt_get_block(
 826                                                             cur, level, &bp);
 827 #ifdef DEBUG
 828                                                 if ((error =
 829                                                     xfs_btree_check_lblock(cur,
 830                                                             block, level, bp))) {
 831                                                         XFS_BMBT_TRACE_CURSOR(
 832                                                                 cur, ERROR);
 833                                                         return error;
 834                                                 }
 835 #endif
 836                                                 ptr = cur->bc_ptrs[level];
 837                                                 xfs_bmbt_disk_set_allf(&nrec,
 838                                                         startoff, 0, 0,
 839                                                         XFS_EXT_NORM);
 840                                         } else {
 841                                                 XFS_BMBT_TRACE_CURSOR(cur,
 842                                                         EXIT);
 843                                                 *stat = 0;
 844                                                 return 0;
 845                                         }
 846                                 }
 847                         }
 848                 }
 849         }
 850         numrecs = be16_to_cpu(block->bb_numrecs);
 851         if (level > 0) {
 852                 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
 853                 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
 854 #ifdef DEBUG
 855                 for (i = numrecs; i >= ptr; i--) {
 856                         if ((error = xfs_btree_check_lptr_disk(cur, pp[i - 1],
 857                                         level))) {
 858                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 859                                 return error;
 860                         }
 861                 }
 862 #endif
 863                 memmove(&kp[ptr], &kp[ptr - 1],
 864                         (numrecs - ptr + 1) * sizeof(*kp));
 865                 memmove(&pp[ptr], &pp[ptr - 1], /* INT_: direct copy */
 866                         (numrecs - ptr + 1) * sizeof(*pp));
 867 #ifdef DEBUG
 868                 if ((error = xfs_btree_check_lptr(cur, *bnop, level))) {
 869                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 870                         return error;
 871                 }
 872 #endif
 873                 kp[ptr - 1] = key;
 874                 pp[ptr - 1] = cpu_to_be64(*bnop);
 875                 numrecs++;
 876                 block->bb_numrecs = cpu_to_be16(numrecs);
 877                 xfs_bmbt_log_keys(cur, bp, ptr, numrecs);
 878                 xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs);
 879         } else {
 880                 rp = XFS_BMAP_REC_IADDR(block, 1, cur);
 881                 memmove(&rp[ptr], &rp[ptr - 1],
 882                         (numrecs - ptr + 1) * sizeof(*rp));
 883                 rp[ptr - 1] = *recp;
 884                 numrecs++;
 885                 block->bb_numrecs = cpu_to_be16(numrecs);
 886                 xfs_bmbt_log_recs(cur, bp, ptr, numrecs);
 887         }
 888         xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
 889 #ifdef DEBUG
 890         if (ptr < numrecs) {
 891                 if (level == 0)
 892                         xfs_btree_check_rec(XFS_BTNUM_BMAP, rp + ptr - 1,
 893                                 rp + ptr);
 894                 else
 895                         xfs_btree_check_key(XFS_BTNUM_BMAP, kp + ptr - 1,
 896                                 kp + ptr);
 897         }
 898 #endif
 899         if (optr == 1 && (error = xfs_bmbt_updkey(cur, &key, level + 1))) {
 900                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 901                 return error;
 902         }
 903         *bnop = nbno;
 904         if (nbno != NULLFSBLOCK) {
 905                 *recp = nrec;
 906                 *curp = ncur;
 907         }
 908         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 909         *stat = 1;
 910         return 0;
 911 }
 912
 913 STATIC int
 914 xfs_bmbt_killroot(
 915         xfs_btree_cur_t         *cur)
 916 {
 917         xfs_bmbt_block_t        *block;
 918         xfs_bmbt_block_t        *cblock;
 919         xfs_buf_t               *cbp;
 920         xfs_bmbt_key_t          *ckp;
 921         xfs_bmbt_ptr_t          *cpp;
 922 #ifdef DEBUG
 923         int                     error;
 924 #endif
 925 #ifdef XFS_BMBT_TRACE
 926         static char             fname[] = "xfs_bmbt_killroot";
 927 #endif
 928         int                     i;
 929         xfs_bmbt_key_t          *kp;
 930         xfs_inode_t             *ip;
 931         xfs_ifork_t             *ifp;
 932         int                     level;
 933         xfs_bmbt_ptr_t          *pp;
 934
 935         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
 936         level = cur->bc_nlevels - 1;
 937         ASSERT(level >= 1);
 938         /*
 939          * Don't deal with the root block needs to be a leaf case.
 940          * We're just going to turn the thing back into extents anyway.
 941          */
 942         if (level == 1) {
 943                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 944                 return 0;
 945         }
 946         block = xfs_bmbt_get_block(cur, level, &cbp);
 947         /*
 948          * Give up if the root has multiple children.
 949          */
 950         if (be16_to_cpu(block->bb_numrecs) != 1) {
 951                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 952                 return 0;
 953         }
 954         /*
 955          * Only do this if the next level will fit.
 956          * Then the data must be copied up to the inode,
 957          * instead of freeing the root you free the next level.
 958          */
 959         cbp = cur->bc_bufs[level - 1];
 960         cblock = XFS_BUF_TO_BMBT_BLOCK(cbp);
 961         if (be16_to_cpu(cblock->bb_numrecs) > XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
 962                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
 963                 return 0;
 964         }
 965         ASSERT(be64_to_cpu(cblock->bb_leftsib) == NULLDFSBNO);
 966         ASSERT(be64_to_cpu(cblock->bb_rightsib) == NULLDFSBNO);
 967         ip = cur->bc_private.b.ip;
 968         ifp = XFS_IFORK_PTR(ip, cur->bc_private.b.whichfork);
 969         ASSERT(XFS_BMAP_BLOCK_IMAXRECS(level, cur) ==
 970                XFS_BMAP_BROOT_MAXRECS(ifp->if_broot_bytes));
 971         i = (int)(be16_to_cpu(cblock->bb_numrecs) - XFS_BMAP_BLOCK_IMAXRECS(level, cur));
 972         if (i) {
 973                 xfs_iroot_realloc(ip, i, cur->bc_private.b.whichfork);
 974                 block = ifp->if_broot;
 975         }
 976         be16_add(&block->bb_numrecs, i);
 977         ASSERT(block->bb_numrecs == cblock->bb_numrecs);
 978         kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
 979         ckp = XFS_BMAP_KEY_IADDR(cblock, 1, cur);
 980         memcpy(kp, ckp, be16_to_cpu(block->bb_numrecs) * sizeof(*kp));
 981         pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
 982         cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
 983 #ifdef DEBUG
 984         for (i = 0; i < be16_to_cpu(cblock->bb_numrecs); i++) {
 985                 if ((error = xfs_btree_check_lptr_disk(cur, cpp[i], level - 1))) {
 986                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
 987                         return error;
 988                 }
 989         }
 990 #endif
 991         memcpy(pp, cpp, be16_to_cpu(block->bb_numrecs) * sizeof(*pp));
 992         xfs_bmap_add_free(XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(cbp)), 1,
 993                         cur->bc_private.b.flist, cur->bc_mp);
 994         ip->i_d.di_nblocks--;
 995         XFS_TRANS_MOD_DQUOT_BYINO(cur->bc_mp, cur->bc_tp, ip,
 996                         XFS_TRANS_DQ_BCOUNT, -1L);
 997         xfs_trans_binval(cur->bc_tp, cbp);
 998         cur->bc_bufs[level - 1] = NULL;
 999         be16_add(&block->bb_level, -1);
1000         xfs_trans_log_inode(cur->bc_tp, ip,
1001                 XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
1002         cur->bc_nlevels--;
1003         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1004         return 0;
1005 }
1006
1007 /*
1008  * Log key values from the btree block.
1009  */
1010 STATIC void
1011 xfs_bmbt_log_keys(
1012         xfs_btree_cur_t *cur,
1013         xfs_buf_t       *bp,
1014         int             kfirst,
1015         int             klast)
1016 {
1017 #ifdef XFS_BMBT_TRACE
1018         static char     fname[] = "xfs_bmbt_log_keys";
1019 #endif
1020         xfs_trans_t     *tp;
1021
1022         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1023         XFS_BMBT_TRACE_ARGBII(cur, bp, kfirst, klast);
1024         tp = cur->bc_tp;
1025         if (bp) {
1026                 xfs_bmbt_block_t        *block;
1027                 int                     first;
1028                 xfs_bmbt_key_t          *kp;
1029                 int                     last;
1030
1031                 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1032                 kp = XFS_BMAP_KEY_DADDR(block, 1, cur);
1033                 first = (int)((xfs_caddr_t)&kp[kfirst - 1] - (xfs_caddr_t)block);
1034                 last = (int)(((xfs_caddr_t)&kp[klast] - 1) - (xfs_caddr_t)block);
1035                 xfs_trans_log_buf(tp, bp, first, last);
1036         } else {
1037                 xfs_inode_t              *ip;
1038
1039                 ip = cur->bc_private.b.ip;
1040                 xfs_trans_log_inode(tp, ip,
1041                         XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
1042         }
1043         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1044 }
1045
1046 /*
1047  * Log pointer values from the btree block.
1048  */
1049 STATIC void
1050 xfs_bmbt_log_ptrs(
1051         xfs_btree_cur_t *cur,
1052         xfs_buf_t       *bp,
1053         int             pfirst,
1054         int             plast)
1055 {
1056 #ifdef XFS_BMBT_TRACE
1057         static char     fname[] = "xfs_bmbt_log_ptrs";
1058 #endif
1059         xfs_trans_t     *tp;
1060
1061         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1062         XFS_BMBT_TRACE_ARGBII(cur, bp, pfirst, plast);
1063         tp = cur->bc_tp;
1064         if (bp) {
1065                 xfs_bmbt_block_t        *block;
1066                 int                     first;
1067                 int                     last;
1068                 xfs_bmbt_ptr_t          *pp;
1069
1070                 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1071                 pp = XFS_BMAP_PTR_DADDR(block, 1, cur);
1072                 first = (int)((xfs_caddr_t)&pp[pfirst - 1] - (xfs_caddr_t)block);
1073                 last = (int)(((xfs_caddr_t)&pp[plast] - 1) - (xfs_caddr_t)block);
1074                 xfs_trans_log_buf(tp, bp, first, last);
1075         } else {
1076                 xfs_inode_t             *ip;
1077
1078                 ip = cur->bc_private.b.ip;
1079                 xfs_trans_log_inode(tp, ip,
1080                         XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
1081         }
1082         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1083 }
1084
1085 /*
1086  * Lookup the record.  The cursor is made to point to it, based on dir.
1087  */
1088 STATIC int                              /* error */
1089 xfs_bmbt_lookup(
1090         xfs_btree_cur_t         *cur,
1091         xfs_lookup_t            dir,
1092         int                     *stat)          /* success/failure */
1093 {
1094         xfs_bmbt_block_t        *block=NULL;
1095         xfs_buf_t               *bp;
1096         xfs_daddr_t             d;
1097         xfs_sfiloff_t           diff;
1098         int                     error;          /* error return value */
1099 #ifdef XFS_BMBT_TRACE
1100         static char     fname[] = "xfs_bmbt_lookup";
1101 #endif
1102         xfs_fsblock_t           fsbno=0;
1103         int                     high;
1104         int                     i;
1105         int                     keyno=0;
1106         xfs_bmbt_key_t          *kkbase=NULL;
1107         xfs_bmbt_key_t          *kkp;
1108         xfs_bmbt_rec_t          *krbase=NULL;
1109         xfs_bmbt_rec_t          *krp;
1110         int                     level;
1111         int                     low;
1112         xfs_mount_t             *mp;
1113         xfs_bmbt_ptr_t          *pp;
1114         xfs_bmbt_irec_t         *rp;
1115         xfs_fileoff_t           startoff;
1116         xfs_trans_t             *tp;
1117
1118         XFS_STATS_INC(xs_bmbt_lookup);
1119         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1120         XFS_BMBT_TRACE_ARGI(cur, (int)dir);
1121         tp = cur->bc_tp;
1122         mp = cur->bc_mp;
1123         rp = &cur->bc_rec.b;
1124         for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) {
1125                 if (level < cur->bc_nlevels - 1) {
1126                         d = XFS_FSB_TO_DADDR(mp, fsbno);
1127                         bp = cur->bc_bufs[level];
1128                         if (bp && XFS_BUF_ADDR(bp) != d)
1129                                 bp = NULL;
1130                         if (!bp) {
1131                                 if ((error = xfs_btree_read_bufl(mp, tp, fsbno,
1132                                                 0, &bp, XFS_BMAP_BTREE_REF))) {
1133                                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1134                                         return error;
1135                                 }
1136                                 xfs_btree_setbuf(cur, level, bp);
1137                                 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1138                                 if ((error = xfs_btree_check_lblock(cur, block,
1139                                                 level, bp))) {
1140                                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1141                                         return error;
1142                                 }
1143                         } else
1144                                 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1145                 } else
1146                         block = xfs_bmbt_get_block(cur, level, &bp);
1147                 if (diff == 0)
1148                         keyno = 1;
1149                 else {
1150                         if (level > 0)
1151                                 kkbase = XFS_BMAP_KEY_IADDR(block, 1, cur);
1152                         else
1153                                 krbase = XFS_BMAP_REC_IADDR(block, 1, cur);
1154                         low = 1;
1155                         if (!(high = be16_to_cpu(block->bb_numrecs))) {
1156                                 ASSERT(level == 0);
1157                                 cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE;
1158                                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1159                                 *stat = 0;
1160                                 return 0;
1161                         }
1162                         while (low <= high) {
1163                                 XFS_STATS_INC(xs_bmbt_compare);
1164                                 keyno = (low + high) >> 1;
1165                                 if (level > 0) {
1166                                         kkp = kkbase + keyno - 1;
1167                                         startoff = be64_to_cpu(kkp->br_startoff);
1168                                 } else {
1169                                         krp = krbase + keyno - 1;
1170                                         startoff = xfs_bmbt_disk_get_startoff(krp);
1171                                 }
1172                                 diff = (xfs_sfiloff_t)
1173                                                 (startoff - rp->br_startoff);
1174                                 if (diff < 0)
1175                                         low = keyno + 1;
1176                                 else if (diff > 0)
1177                                         high = keyno - 1;
1178                                 else
1179                                         break;
1180                         }
1181                 }
1182                 if (level > 0) {
1183                         if (diff > 0 && --keyno < 1)
1184                                 keyno = 1;
1185                         pp = XFS_BMAP_PTR_IADDR(block, keyno, cur);
1186                         fsbno = be64_to_cpu(*pp);
1187 #ifdef DEBUG
1188                         if ((error = xfs_btree_check_lptr(cur, fsbno, level))) {
1189                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1190                                 return error;
1191                         }
1192 #endif
1193                         cur->bc_ptrs[level] = keyno;
1194                 }
1195         }
1196         if (dir != XFS_LOOKUP_LE && diff < 0) {
1197                 keyno++;
1198                 /*
1199                  * If ge search and we went off the end of the block, but it's
1200                  * not the last block, we're in the wrong block.
1201                  */
1202                 if (dir == XFS_LOOKUP_GE && keyno > be16_to_cpu(block->bb_numrecs) &&
1203                     be64_to_cpu(block->bb_rightsib) != NULLDFSBNO) {
1204                         cur->bc_ptrs[0] = keyno;
1205                         if ((error = xfs_bmbt_increment(cur, 0, &i))) {
1206                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1207                                 return error;
1208                         }
1209                         XFS_WANT_CORRUPTED_RETURN(i == 1);
1210                         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1211                         *stat = 1;
1212                         return 0;
1213                 }
1214         }
1215         else if (dir == XFS_LOOKUP_LE && diff > 0)
1216                 keyno--;
1217         cur->bc_ptrs[0] = keyno;
1218         if (keyno == 0 || keyno > be16_to_cpu(block->bb_numrecs)) {
1219                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1220                 *stat = 0;
1221         } else {
1222                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1223                 *stat = ((dir != XFS_LOOKUP_EQ) || (diff == 0));
1224         }
1225         return 0;
1226 }
1227
1228 /*
1229  * Move 1 record left from cur/level if possible.
1230  * Update cur to reflect the new path.
1231  */
1232 STATIC int                                      /* error */
1233 xfs_bmbt_lshift(
1234         xfs_btree_cur_t         *cur,
1235         int                     level,
1236         int                     *stat)          /* success/failure */
1237 {
1238         int                     error;          /* error return value */
1239 #ifdef XFS_BMBT_TRACE
1240         static char             fname[] = "xfs_bmbt_lshift";
1241 #endif
1242 #ifdef DEBUG
1243         int                     i;              /* loop counter */
1244 #endif
1245         xfs_bmbt_key_t          key;            /* bmap btree key */
1246         xfs_buf_t               *lbp;           /* left buffer pointer */
1247         xfs_bmbt_block_t        *left;          /* left btree block */
1248         xfs_bmbt_key_t          *lkp=NULL;      /* left btree key */
1249         xfs_bmbt_ptr_t          *lpp;           /* left address pointer */
1250         int                     lrecs;          /* left record count */
1251         xfs_bmbt_rec_t          *lrp=NULL;      /* left record pointer */
1252         xfs_mount_t             *mp;            /* file system mount point */
1253         xfs_buf_t               *rbp;           /* right buffer pointer */
1254         xfs_bmbt_block_t        *right;         /* right btree block */
1255         xfs_bmbt_key_t          *rkp=NULL;      /* right btree key */
1256         xfs_bmbt_ptr_t          *rpp=NULL;      /* right address pointer */
1257         xfs_bmbt_rec_t          *rrp=NULL;      /* right record pointer */
1258         int                     rrecs;          /* right record count */
1259
1260         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1261         XFS_BMBT_TRACE_ARGI(cur, level);
1262         if (level == cur->bc_nlevels - 1) {
1263                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1264                 *stat = 0;
1265                 return 0;
1266         }
1267         rbp = cur->bc_bufs[level];
1268         right = XFS_BUF_TO_BMBT_BLOCK(rbp);
1269 #ifdef DEBUG
1270         if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
1271                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1272                 return error;
1273         }
1274 #endif
1275         if (be64_to_cpu(right->bb_leftsib) == NULLDFSBNO) {
1276                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1277                 *stat = 0;
1278                 return 0;
1279         }
1280         if (cur->bc_ptrs[level] <= 1) {
1281                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1282                 *stat = 0;
1283                 return 0;
1284         }
1285         mp = cur->bc_mp;
1286         if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, be64_to_cpu(right->bb_leftsib), 0,
1287                         &lbp, XFS_BMAP_BTREE_REF))) {
1288                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1289                 return error;
1290         }
1291         left = XFS_BUF_TO_BMBT_BLOCK(lbp);
1292         if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
1293                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1294                 return error;
1295         }
1296         if (be16_to_cpu(left->bb_numrecs) == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
1297                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1298                 *stat = 0;
1299                 return 0;
1300         }
1301         lrecs = be16_to_cpu(left->bb_numrecs) + 1;
1302         if (level > 0) {
1303                 lkp = XFS_BMAP_KEY_IADDR(left, lrecs, cur);
1304                 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
1305                 *lkp = *rkp;
1306                 xfs_bmbt_log_keys(cur, lbp, lrecs, lrecs);
1307                 lpp = XFS_BMAP_PTR_IADDR(left, lrecs, cur);
1308                 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
1309 #ifdef DEBUG
1310                 if ((error = xfs_btree_check_lptr_disk(cur, *rpp, level))) {
1311                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1312                         return error;
1313                 }
1314 #endif
1315                 *lpp = *rpp; /* INT_: direct copy */
1316                 xfs_bmbt_log_ptrs(cur, lbp, lrecs, lrecs);
1317         } else {
1318                 lrp = XFS_BMAP_REC_IADDR(left, lrecs, cur);
1319                 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
1320                 *lrp = *rrp;
1321                 xfs_bmbt_log_recs(cur, lbp, lrecs, lrecs);
1322         }
1323         left->bb_numrecs = cpu_to_be16(lrecs);
1324         xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
1325 #ifdef DEBUG
1326         if (level > 0)
1327                 xfs_btree_check_key(XFS_BTNUM_BMAP, lkp - 1, lkp);
1328         else
1329                 xfs_btree_check_rec(XFS_BTNUM_BMAP, lrp - 1, lrp);
1330 #endif
1331         rrecs = be16_to_cpu(right->bb_numrecs) - 1;
1332         right->bb_numrecs = cpu_to_be16(rrecs);
1333         xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
1334         if (level > 0) {
1335 #ifdef DEBUG
1336                 for (i = 0; i < rrecs; i++) {
1337                         if ((error = xfs_btree_check_lptr_disk(cur, rpp[i + 1],
1338                                         level))) {
1339                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1340                                 return error;
1341                         }
1342                 }
1343 #endif
1344                 memmove(rkp, rkp + 1, rrecs * sizeof(*rkp));
1345                 memmove(rpp, rpp + 1, rrecs * sizeof(*rpp));
1346                 xfs_bmbt_log_keys(cur, rbp, 1, rrecs);
1347                 xfs_bmbt_log_ptrs(cur, rbp, 1, rrecs);
1348         } else {
1349                 memmove(rrp, rrp + 1, rrecs * sizeof(*rrp));
1350                 xfs_bmbt_log_recs(cur, rbp, 1, rrecs);
1351                 key.br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(rrp));
1352                 rkp = &key;
1353         }
1354         if ((error = xfs_bmbt_updkey(cur, rkp, level + 1))) {
1355                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1356                 return error;
1357         }
1358         cur->bc_ptrs[level]--;
1359         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1360         *stat = 1;
1361         return 0;
1362 }
1363
1364 /*
1365  * Move 1 record right from cur/level if possible.
1366  * Update cur to reflect the new path.
1367  */
1368 STATIC int                                      /* error */
1369 xfs_bmbt_rshift(
1370         xfs_btree_cur_t         *cur,
1371         int                     level,
1372         int                     *stat)          /* success/failure */
1373 {
1374         int                     error;          /* error return value */
1375 #ifdef XFS_BMBT_TRACE
1376         static char             fname[] = "xfs_bmbt_rshift";
1377 #endif
1378         int                     i;              /* loop counter */
1379         xfs_bmbt_key_t          key;            /* bmap btree key */
1380         xfs_buf_t               *lbp;           /* left buffer pointer */
1381         xfs_bmbt_block_t        *left;          /* left btree block */
1382         xfs_bmbt_key_t          *lkp;           /* left btree key */
1383         xfs_bmbt_ptr_t          *lpp;           /* left address pointer */
1384         xfs_bmbt_rec_t          *lrp;           /* left record pointer */
1385         xfs_mount_t             *mp;            /* file system mount point */
1386         xfs_buf_t               *rbp;           /* right buffer pointer */
1387         xfs_bmbt_block_t        *right;         /* right btree block */
1388         xfs_bmbt_key_t          *rkp;           /* right btree key */
1389         xfs_bmbt_ptr_t          *rpp;           /* right address pointer */
1390         xfs_bmbt_rec_t          *rrp=NULL;      /* right record pointer */
1391         struct xfs_btree_cur    *tcur;          /* temporary btree cursor */
1392
1393         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1394         XFS_BMBT_TRACE_ARGI(cur, level);
1395         if (level == cur->bc_nlevels - 1) {
1396                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1397                 *stat = 0;
1398                 return 0;
1399         }
1400         lbp = cur->bc_bufs[level];
1401         left = XFS_BUF_TO_BMBT_BLOCK(lbp);
1402 #ifdef DEBUG
1403         if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
1404                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1405                 return error;
1406         }
1407 #endif
1408         if (be64_to_cpu(left->bb_rightsib) == NULLDFSBNO) {
1409                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1410                 *stat = 0;
1411                 return 0;
1412         }
1413         if (cur->bc_ptrs[level] >= be16_to_cpu(left->bb_numrecs)) {
1414                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1415                 *stat = 0;
1416                 return 0;
1417         }
1418         mp = cur->bc_mp;
1419         if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, be64_to_cpu(left->bb_rightsib), 0,
1420                         &rbp, XFS_BMAP_BTREE_REF))) {
1421                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1422                 return error;
1423         }
1424         right = XFS_BUF_TO_BMBT_BLOCK(rbp);
1425         if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
1426                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1427                 return error;
1428         }
1429         if (be16_to_cpu(right->bb_numrecs) == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
1430                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1431                 *stat = 0;
1432                 return 0;
1433         }
1434         if (level > 0) {
1435                 lkp = XFS_BMAP_KEY_IADDR(left, be16_to_cpu(left->bb_numrecs), cur);
1436                 lpp = XFS_BMAP_PTR_IADDR(left, be16_to_cpu(left->bb_numrecs), cur);
1437                 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
1438                 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
1439 #ifdef DEBUG
1440                 for (i = be16_to_cpu(right->bb_numrecs) - 1; i >= 0; i--) {
1441                         if ((error = xfs_btree_check_lptr_disk(cur, rpp[i], level))) {
1442                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1443                                 return error;
1444                         }
1445                 }
1446 #endif
1447                 memmove(rkp + 1, rkp, be16_to_cpu(right->bb_numrecs) * sizeof(*rkp));
1448                 memmove(rpp + 1, rpp, be16_to_cpu(right->bb_numrecs) * sizeof(*rpp));
1449 #ifdef DEBUG
1450                 if ((error = xfs_btree_check_lptr_disk(cur, *lpp, level))) {
1451                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1452                         return error;
1453                 }
1454 #endif
1455                 *rkp = *lkp;
1456                 *rpp = *lpp; /* INT_: direct copy */
1457                 xfs_bmbt_log_keys(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
1458                 xfs_bmbt_log_ptrs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
1459         } else {
1460                 lrp = XFS_BMAP_REC_IADDR(left, be16_to_cpu(left->bb_numrecs), cur);
1461                 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
1462                 memmove(rrp + 1, rrp, be16_to_cpu(right->bb_numrecs) * sizeof(*rrp));
1463                 *rrp = *lrp;
1464                 xfs_bmbt_log_recs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
1465                 key.br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(rrp));
1466                 rkp = &key;
1467         }
1468         be16_add(&left->bb_numrecs, -1);
1469         xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
1470         be16_add(&right->bb_numrecs, 1);
1471 #ifdef DEBUG
1472         if (level > 0)
1473                 xfs_btree_check_key(XFS_BTNUM_BMAP, rkp, rkp + 1);
1474         else
1475                 xfs_btree_check_rec(XFS_BTNUM_BMAP, rrp, rrp + 1);
1476 #endif
1477         xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
1478         if ((error = xfs_btree_dup_cursor(cur, &tcur))) {
1479                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1480                 return error;
1481         }
1482         i = xfs_btree_lastrec(tcur, level);
1483         XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
1484         if ((error = xfs_bmbt_increment(tcur, level, &i))) {
1485                 XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
1486                 goto error1;
1487         }
1488         XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
1489         if ((error = xfs_bmbt_updkey(tcur, rkp, level + 1))) {
1490                 XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
1491                 goto error1;
1492         }
1493         xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
1494         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1495         *stat = 1;
1496         return 0;
1497 error0:
1498         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1499 error1:
1500         xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
1501         return error;
1502 }
1503
1504 /*
1505  * Determine the extent state.
1506  */
1507 /* ARGSUSED */
1508 STATIC xfs_exntst_t
1509 xfs_extent_state(
1510         xfs_filblks_t           blks,
1511         int                     extent_flag)
1512 {
1513         if (extent_flag) {
1514                 ASSERT(blks != 0);      /* saved for DMIG */
1515                 return XFS_EXT_UNWRITTEN;
1516         }
1517         return XFS_EXT_NORM;
1518 }
1519
1520
1521 /*
1522  * Split cur/level block in half.
1523  * Return new block number and its first record (to be inserted into parent).
1524  */
1525 STATIC int                                      /* error */
1526 xfs_bmbt_split(
1527         xfs_btree_cur_t         *cur,
1528         int                     level,
1529         xfs_fsblock_t           *bnop,
1530         __uint64_t              *startoff,
1531         xfs_btree_cur_t         **curp,
1532         int                     *stat)          /* success/failure */
1533 {
1534         xfs_alloc_arg_t         args;           /* block allocation args */
1535         int                     error;          /* error return value */
1536 #ifdef XFS_BMBT_TRACE
1537         static char             fname[] = "xfs_bmbt_split";
1538 #endif
1539         int                     i;              /* loop counter */
1540         xfs_fsblock_t           lbno;           /* left sibling block number */
1541         xfs_buf_t               *lbp;           /* left buffer pointer */
1542         xfs_bmbt_block_t        *left;          /* left btree block */
1543         xfs_bmbt_key_t          *lkp;           /* left btree key */
1544         xfs_bmbt_ptr_t          *lpp;           /* left address pointer */
1545         xfs_bmbt_rec_t          *lrp;           /* left record pointer */
1546         xfs_buf_t               *rbp;           /* right buffer pointer */
1547         xfs_bmbt_block_t        *right;         /* right btree block */
1548         xfs_bmbt_key_t          *rkp;           /* right btree key */
1549         xfs_bmbt_ptr_t          *rpp;           /* right address pointer */
1550         xfs_bmbt_block_t        *rrblock;       /* right-right btree block */
1551         xfs_buf_t               *rrbp;          /* right-right buffer pointer */
1552         xfs_bmbt_rec_t          *rrp;           /* right record pointer */
1553
1554         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1555         XFS_BMBT_TRACE_ARGIFK(cur, level, *bnop, *startoff);
1556         args.tp = cur->bc_tp;
1557         args.mp = cur->bc_mp;
1558         lbp = cur->bc_bufs[level];
1559         lbno = XFS_DADDR_TO_FSB(args.mp, XFS_BUF_ADDR(lbp));
1560         left = XFS_BUF_TO_BMBT_BLOCK(lbp);
1561         args.fsbno = cur->bc_private.b.firstblock;
1562         args.firstblock = args.fsbno;
1563         if (args.fsbno == NULLFSBLOCK) {
1564                 args.fsbno = lbno;
1565                 args.type = XFS_ALLOCTYPE_START_BNO;
1566         } else
1567                 args.type = XFS_ALLOCTYPE_NEAR_BNO;
1568         args.mod = args.minleft = args.alignment = args.total = args.isfl =
1569                 args.userdata = args.minalignslop = 0;
1570         args.minlen = args.maxlen = args.prod = 1;
1571         args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
1572         if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) {
1573                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1574                 return XFS_ERROR(ENOSPC);
1575         }
1576         if ((error = xfs_alloc_vextent(&args))) {
1577                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1578                 return error;
1579         }
1580         if (args.fsbno == NULLFSBLOCK) {
1581                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1582                 *stat = 0;
1583                 return 0;
1584         }
1585         ASSERT(args.len == 1);
1586         cur->bc_private.b.firstblock = args.fsbno;
1587         cur->bc_private.b.allocated++;
1588         cur->bc_private.b.ip->i_d.di_nblocks++;
1589         xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
1590         XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
1591                         XFS_TRANS_DQ_BCOUNT, 1L);
1592         rbp = xfs_btree_get_bufl(args.mp, args.tp, args.fsbno, 0);
1593         right = XFS_BUF_TO_BMBT_BLOCK(rbp);
1594 #ifdef DEBUG
1595         if ((error = xfs_btree_check_lblock(cur, left, level, rbp))) {
1596                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1597                 return error;
1598         }
1599 #endif
1600         right->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
1601         right->bb_level = left->bb_level;
1602         right->bb_numrecs = cpu_to_be16(be16_to_cpu(left->bb_numrecs) / 2);
1603         if ((be16_to_cpu(left->bb_numrecs) & 1) &&
1604             cur->bc_ptrs[level] <= be16_to_cpu(right->bb_numrecs) + 1)
1605                 be16_add(&right->bb_numrecs, 1);
1606         i = be16_to_cpu(left->bb_numrecs) - be16_to_cpu(right->bb_numrecs) + 1;
1607         if (level > 0) {
1608                 lkp = XFS_BMAP_KEY_IADDR(left, i, cur);
1609                 lpp = XFS_BMAP_PTR_IADDR(left, i, cur);
1610                 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
1611                 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
1612 #ifdef DEBUG
1613                 for (i = 0; i < be16_to_cpu(right->bb_numrecs); i++) {
1614                         if ((error = xfs_btree_check_lptr_disk(cur, lpp[i], level))) {
1615                                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1616                                 return error;
1617                         }
1618                 }
1619 #endif
1620                 memcpy(rkp, lkp, be16_to_cpu(right->bb_numrecs) * sizeof(*rkp));
1621                 memcpy(rpp, lpp, be16_to_cpu(right->bb_numrecs) * sizeof(*rpp));
1622                 xfs_bmbt_log_keys(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
1623                 xfs_bmbt_log_ptrs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
1624                 *startoff = be64_to_cpu(rkp->br_startoff);
1625         } else {
1626                 lrp = XFS_BMAP_REC_IADDR(left, i, cur);
1627                 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
1628                 memcpy(rrp, lrp, be16_to_cpu(right->bb_numrecs) * sizeof(*rrp));
1629                 xfs_bmbt_log_recs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
1630                 *startoff = xfs_bmbt_disk_get_startoff(rrp);
1631         }
1632         be16_add(&left->bb_numrecs, -(be16_to_cpu(right->bb_numrecs)));
1633         right->bb_rightsib = left->bb_rightsib;
1634         left->bb_rightsib = cpu_to_be64(args.fsbno);
1635         right->bb_leftsib = cpu_to_be64(lbno);
1636         xfs_bmbt_log_block(cur, rbp, XFS_BB_ALL_BITS);
1637         xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
1638         if (be64_to_cpu(right->bb_rightsib) != NULLDFSBNO) {
1639                 if ((error = xfs_btree_read_bufl(args.mp, args.tp,
1640                                 be64_to_cpu(right->bb_rightsib), 0, &rrbp,
1641                                 XFS_BMAP_BTREE_REF))) {
1642                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1643                         return error;
1644                 }
1645                 rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
1646                 if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) {
1647                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1648                         return error;
1649                 }
1650                 rrblock->bb_leftsib = cpu_to_be64(args.fsbno);
1651                 xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
1652         }
1653         if (cur->bc_ptrs[level] > be16_to_cpu(left->bb_numrecs) + 1) {
1654                 xfs_btree_setbuf(cur, level, rbp);
1655                 cur->bc_ptrs[level] -= be16_to_cpu(left->bb_numrecs);
1656         }
1657         if (level + 1 < cur->bc_nlevels) {
1658                 if ((error = xfs_btree_dup_cursor(cur, curp))) {
1659                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1660                         return error;
1661                 }
1662                 (*curp)->bc_ptrs[level + 1]++;
1663         }
1664         *bnop = args.fsbno;
1665         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1666         *stat = 1;
1667         return 0;
1668 }
1669
1670
1671 /*
1672  * Update keys for the record.
1673  */
1674 STATIC int
1675 xfs_bmbt_updkey(
1676         xfs_btree_cur_t         *cur,
1677         xfs_bmbt_key_t          *keyp,  /* on-disk format */
1678         int                     level)
1679 {
1680         xfs_bmbt_block_t        *block;
1681         xfs_buf_t               *bp;
1682 #ifdef DEBUG
1683         int                     error;
1684 #endif
1685 #ifdef XFS_BMBT_TRACE
1686         static char             fname[] = "xfs_bmbt_updkey";
1687 #endif
1688         xfs_bmbt_key_t          *kp;
1689         int                     ptr;
1690
1691         ASSERT(level >= 1);
1692         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1693         XFS_BMBT_TRACE_ARGIK(cur, level, keyp);
1694         for (ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
1695                 block = xfs_bmbt_get_block(cur, level, &bp);
1696 #ifdef DEBUG
1697                 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
1698                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1699                         return error;
1700                 }
1701 #endif
1702                 ptr = cur->bc_ptrs[level];
1703                 kp = XFS_BMAP_KEY_IADDR(block, ptr, cur);
1704                 *kp = *keyp;
1705                 xfs_bmbt_log_keys(cur, bp, ptr, ptr);
1706         }
1707         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1708         return 0;
1709 }
1710
1711 /*
1712  * Convert on-disk form of btree root to in-memory form.
1713  */
1714 void
1715 xfs_bmdr_to_bmbt(
1716         xfs_bmdr_block_t        *dblock,
1717         int                     dblocklen,
1718         xfs_bmbt_block_t        *rblock,
1719         int                     rblocklen)
1720 {
1721         int                     dmxr;
1722         xfs_bmbt_key_t          *fkp;
1723         __be64                  *fpp;
1724         xfs_bmbt_key_t          *tkp;
1725         __be64                  *tpp;
1726
1727         rblock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
1728         rblock->bb_level = dblock->bb_level;
1729         ASSERT(be16_to_cpu(rblock->bb_level) > 0);
1730         rblock->bb_numrecs = dblock->bb_numrecs;
1731         rblock->bb_leftsib = cpu_to_be64(NULLDFSBNO);
1732         rblock->bb_rightsib = cpu_to_be64(NULLDFSBNO);
1733         dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0);
1734         fkp = XFS_BTREE_KEY_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
1735         tkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen);
1736         fpp = XFS_BTREE_PTR_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
1737         tpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen);
1738         dmxr = be16_to_cpu(dblock->bb_numrecs);
1739         memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
1740         memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
1741 }
1742
1743 /*
1744  * Decrement cursor by one record at the level.
1745  * For nonzero levels the leaf-ward information is untouched.
1746  */
1747 int                                             /* error */
1748 xfs_bmbt_decrement(
1749         xfs_btree_cur_t         *cur,
1750         int                     level,
1751         int                     *stat)          /* success/failure */
1752 {
1753         xfs_bmbt_block_t        *block;
1754         xfs_buf_t               *bp;
1755         int                     error;          /* error return value */
1756 #ifdef XFS_BMBT_TRACE
1757         static char             fname[] = "xfs_bmbt_decrement";
1758 #endif
1759         xfs_fsblock_t           fsbno;
1760         int                     lev;
1761         xfs_mount_t             *mp;
1762         xfs_trans_t             *tp;
1763
1764         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1765         XFS_BMBT_TRACE_ARGI(cur, level);
1766         ASSERT(level < cur->bc_nlevels);
1767         if (level < cur->bc_nlevels - 1)
1768                 xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA);
1769         if (--cur->bc_ptrs[level] > 0) {
1770                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1771                 *stat = 1;
1772                 return 0;
1773         }
1774         block = xfs_bmbt_get_block(cur, level, &bp);
1775 #ifdef DEBUG
1776         if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
1777                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1778                 return error;
1779         }
1780 #endif
1781         if (be64_to_cpu(block->bb_leftsib) == NULLDFSBNO) {
1782                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1783                 *stat = 0;
1784                 return 0;
1785         }
1786         for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
1787                 if (--cur->bc_ptrs[lev] > 0)
1788                         break;
1789                 if (lev < cur->bc_nlevels - 1)
1790                         xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA);
1791         }
1792         if (lev == cur->bc_nlevels) {
1793                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1794                 *stat = 0;
1795                 return 0;
1796         }
1797         tp = cur->bc_tp;
1798         mp = cur->bc_mp;
1799         for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
1800                 fsbno = be64_to_cpu(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur));
1801                 if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
1802                                 XFS_BMAP_BTREE_REF))) {
1803                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1804                         return error;
1805                 }
1806                 lev--;
1807                 xfs_btree_setbuf(cur, lev, bp);
1808                 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1809                 if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
1810                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1811                         return error;
1812                 }
1813                 cur->bc_ptrs[lev] = be16_to_cpu(block->bb_numrecs);
1814         }
1815         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1816         *stat = 1;
1817         return 0;
1818 }
1819
1820 /*
1821  * Delete the record pointed to by cur.
1822  */
1823 int                                     /* error */
1824 xfs_bmbt_delete(
1825         xfs_btree_cur_t *cur,
1826         int             *stat)          /* success/failure */
1827 {
1828         int             error;          /* error return value */
1829 #ifdef XFS_BMBT_TRACE
1830         static char     fname[] = "xfs_bmbt_delete";
1831 #endif
1832         int             i;
1833         int             level;
1834
1835         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1836         for (level = 0, i = 2; i == 2; level++) {
1837                 if ((error = xfs_bmbt_delrec(cur, level, &i))) {
1838                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1839                         return error;
1840                 }
1841         }
1842         if (i == 0) {
1843                 for (level = 1; level < cur->bc_nlevels; level++) {
1844                         if (cur->bc_ptrs[level] == 0) {
1845                                 if ((error = xfs_bmbt_decrement(cur, level,
1846                                                 &i))) {
1847                                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1848                                         return error;
1849                                 }
1850                                 break;
1851                         }
1852                 }
1853         }
1854         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1855         *stat = i;
1856         return 0;
1857 }
1858
1859 /*
1860  * Convert a compressed bmap extent record to an uncompressed form.
1861  * This code must be in sync with the routines xfs_bmbt_get_startoff,
1862  * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state.
1863  */
1864
1865 STATIC __inline__ void
1866 __xfs_bmbt_get_all(
1867                 __uint64_t l0,
1868                 __uint64_t l1,
1869                 xfs_bmbt_irec_t *s)
1870 {
1871         int     ext_flag;
1872         xfs_exntst_t st;
1873
1874         ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN));
1875         s->br_startoff = ((xfs_fileoff_t)l0 &
1876                            XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
1877 #if XFS_BIG_BLKNOS
1878         s->br_startblock = (((xfs_fsblock_t)l0 & XFS_MASK64LO(9)) << 43) |
1879                            (((xfs_fsblock_t)l1) >> 21);
1880 #else
1881 #ifdef DEBUG
1882         {
1883                 xfs_dfsbno_t    b;
1884
1885                 b = (((xfs_dfsbno_t)l0 & XFS_MASK64LO(9)) << 43) |
1886                     (((xfs_dfsbno_t)l1) >> 21);
1887                 ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
1888                 s->br_startblock = (xfs_fsblock_t)b;
1889         }
1890 #else   /* !DEBUG */
1891         s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21);
1892 #endif  /* DEBUG */
1893 #endif  /* XFS_BIG_BLKNOS */
1894         s->br_blockcount = (xfs_filblks_t)(l1 & XFS_MASK64LO(21));
1895         /* This is xfs_extent_state() in-line */
1896         if (ext_flag) {
1897                 ASSERT(s->br_blockcount != 0);  /* saved for DMIG */
1898                 st = XFS_EXT_UNWRITTEN;
1899         } else
1900                 st = XFS_EXT_NORM;
1901         s->br_state = st;
1902 }
1903
1904 void
1905 xfs_bmbt_get_all(
1906         xfs_bmbt_rec_t  *r,
1907         xfs_bmbt_irec_t *s)
1908 {
1909         __xfs_bmbt_get_all(r->l0, r->l1, s);
1910 }
1911
1912 /*
1913  * Get the block pointer for the given level of the cursor.
1914  * Fill in the buffer pointer, if applicable.
1915  */
1916 xfs_bmbt_block_t *
1917 xfs_bmbt_get_block(
1918         xfs_btree_cur_t         *cur,
1919         int                     level,
1920         xfs_buf_t               **bpp)
1921 {
1922         xfs_ifork_t             *ifp;
1923         xfs_bmbt_block_t        *rval;
1924
1925         if (level < cur->bc_nlevels - 1) {
1926                 *bpp = cur->bc_bufs[level];
1927                 rval = XFS_BUF_TO_BMBT_BLOCK(*bpp);
1928         } else {
1929                 *bpp = NULL;
1930                 ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
1931                         cur->bc_private.b.whichfork);
1932                 rval = ifp->if_broot;
1933         }
1934         return rval;
1935 }
1936
1937 /*
1938  * Extract the blockcount field from an in memory bmap extent record.
1939  */
1940 xfs_filblks_t
1941 xfs_bmbt_get_blockcount(
1942         xfs_bmbt_rec_t  *r)
1943 {
1944         return (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21));
1945 }
1946
1947 /*
1948  * Extract the startblock field from an in memory bmap extent record.
1949  */
1950 xfs_fsblock_t
1951 xfs_bmbt_get_startblock(
1952         xfs_bmbt_rec_t  *r)
1953 {
1954 #if XFS_BIG_BLKNOS
1955         return (((xfs_fsblock_t)r->l0 & XFS_MASK64LO(9)) << 43) |
1956                (((xfs_fsblock_t)r->l1) >> 21);
1957 #else
1958 #ifdef DEBUG
1959         xfs_dfsbno_t    b;
1960
1961         b = (((xfs_dfsbno_t)r->l0 & XFS_MASK64LO(9)) << 43) |
1962             (((xfs_dfsbno_t)r->l1) >> 21);
1963         ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
1964         return (xfs_fsblock_t)b;
1965 #else   /* !DEBUG */
1966         return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21);
1967 #endif  /* DEBUG */
1968 #endif  /* XFS_BIG_BLKNOS */
1969 }
1970
1971 /*
1972  * Extract the startoff field from an in memory bmap extent record.
1973  */
1974 xfs_fileoff_t
1975 xfs_bmbt_get_startoff(
1976         xfs_bmbt_rec_t  *r)
1977 {
1978         return ((xfs_fileoff_t)r->l0 &
1979                  XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
1980 }
1981
1982 xfs_exntst_t
1983 xfs_bmbt_get_state(
1984         xfs_bmbt_rec_t  *r)
1985 {
1986         int     ext_flag;
1987
1988         ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN));
1989         return xfs_extent_state(xfs_bmbt_get_blockcount(r),
1990                                 ext_flag);
1991 }
1992
1993 #ifndef XFS_NATIVE_HOST
1994 /* Endian flipping versions of the bmbt extraction functions */
1995 void
1996 xfs_bmbt_disk_get_all(
1997         xfs_bmbt_rec_t  *r,
1998         xfs_bmbt_irec_t *s)
1999 {
2000         __uint64_t      l0, l1;
2001
2002         l0 = INT_GET(r->l0, ARCH_CONVERT);
2003         l1 = INT_GET(r->l1, ARCH_CONVERT);
2004
2005         __xfs_bmbt_get_all(l0, l1, s);
2006 }
2007
2008 /*
2009  * Extract the blockcount field from an on disk bmap extent record.
2010  */
2011 xfs_filblks_t
2012 xfs_bmbt_disk_get_blockcount(
2013         xfs_bmbt_rec_t  *r)
2014 {
2015         return (xfs_filblks_t)(INT_GET(r->l1, ARCH_CONVERT) & XFS_MASK64LO(21));
2016 }
2017
2018 /*
2019  * Extract the startblock field from an on disk bmap extent record.
2020  */
2021 xfs_fsblock_t
2022 xfs_bmbt_disk_get_startblock(
2023         xfs_bmbt_rec_t  *r)
2024 {
2025 #if XFS_BIG_BLKNOS
2026         return (((xfs_fsblock_t)INT_GET(r->l0, ARCH_CONVERT) & XFS_MASK64LO(9)) << 43) |
2027                (((xfs_fsblock_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
2028 #else
2029 #ifdef DEBUG
2030         xfs_dfsbno_t    b;
2031
2032         b = (((xfs_dfsbno_t)INT_GET(r->l0, ARCH_CONVERT) & XFS_MASK64LO(9)) << 43) |
2033             (((xfs_dfsbno_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
2034         ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
2035         return (xfs_fsblock_t)b;
2036 #else   /* !DEBUG */
2037         return (xfs_fsblock_t)(((xfs_dfsbno_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
2038 #endif  /* DEBUG */
2039 #endif  /* XFS_BIG_BLKNOS */
2040 }
2041
2042 /*
2043  * Extract the startoff field from a disk format bmap extent record.
2044  */
2045 xfs_fileoff_t
2046 xfs_bmbt_disk_get_startoff(
2047         xfs_bmbt_rec_t  *r)
2048 {
2049         return ((xfs_fileoff_t)INT_GET(r->l0, ARCH_CONVERT) &
2050                  XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
2051 }
2052
2053 xfs_exntst_t
2054 xfs_bmbt_disk_get_state(
2055         xfs_bmbt_rec_t  *r)
2056 {
2057         int     ext_flag;
2058
2059         ext_flag = (int)((INT_GET(r->l0, ARCH_CONVERT)) >> (64 - BMBT_EXNTFLAG_BITLEN));
2060         return xfs_extent_state(xfs_bmbt_disk_get_blockcount(r),
2061                                 ext_flag);
2062 }
2063 #endif /* XFS_NATIVE_HOST */
2064
2065
2066 /*
2067  * Increment cursor by one record at the level.
2068  * For nonzero levels the leaf-ward information is untouched.
2069  */
2070 int                                             /* error */
2071 xfs_bmbt_increment(
2072         xfs_btree_cur_t         *cur,
2073         int                     level,
2074         int                     *stat)          /* success/failure */
2075 {
2076         xfs_bmbt_block_t        *block;
2077         xfs_buf_t               *bp;
2078         int                     error;          /* error return value */
2079 #ifdef XFS_BMBT_TRACE
2080         static char             fname[] = "xfs_bmbt_increment";
2081 #endif
2082         xfs_fsblock_t           fsbno;
2083         int                     lev;
2084         xfs_mount_t             *mp;
2085         xfs_trans_t             *tp;
2086
2087         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2088         XFS_BMBT_TRACE_ARGI(cur, level);
2089         ASSERT(level < cur->bc_nlevels);
2090         if (level < cur->bc_nlevels - 1)
2091                 xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA);
2092         block = xfs_bmbt_get_block(cur, level, &bp);
2093 #ifdef DEBUG
2094         if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
2095                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2096                 return error;
2097         }
2098 #endif
2099         if (++cur->bc_ptrs[level] <= be16_to_cpu(block->bb_numrecs)) {
2100                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2101                 *stat = 1;
2102                 return 0;
2103         }
2104         if (be64_to_cpu(block->bb_rightsib) == NULLDFSBNO) {
2105                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2106                 *stat = 0;
2107                 return 0;
2108         }
2109         for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
2110                 block = xfs_bmbt_get_block(cur, lev, &bp);
2111 #ifdef DEBUG
2112                 if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
2113                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2114                         return error;
2115                 }
2116 #endif
2117                 if (++cur->bc_ptrs[lev] <= be16_to_cpu(block->bb_numrecs))
2118                         break;
2119                 if (lev < cur->bc_nlevels - 1)
2120                         xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA);
2121         }
2122         if (lev == cur->bc_nlevels) {
2123                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2124                 *stat = 0;
2125                 return 0;
2126         }
2127         tp = cur->bc_tp;
2128         mp = cur->bc_mp;
2129         for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
2130                 fsbno = be64_to_cpu(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur));
2131                 if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
2132                                 XFS_BMAP_BTREE_REF))) {
2133                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2134                         return error;
2135                 }
2136                 lev--;
2137                 xfs_btree_setbuf(cur, lev, bp);
2138                 block = XFS_BUF_TO_BMBT_BLOCK(bp);
2139                 if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
2140                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2141                         return error;
2142                 }
2143                 cur->bc_ptrs[lev] = 1;
2144         }
2145         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2146         *stat = 1;
2147         return 0;
2148 }
2149
2150 /*
2151  * Insert the current record at the point referenced by cur.
2152  */
2153 int                                     /* error */
2154 xfs_bmbt_insert(
2155         xfs_btree_cur_t *cur,
2156         int             *stat)          /* success/failure */
2157 {
2158         int             error;          /* error return value */
2159 #ifdef XFS_BMBT_TRACE
2160         static char     fname[] = "xfs_bmbt_insert";
2161 #endif
2162         int             i;
2163         int             level;
2164         xfs_fsblock_t   nbno;
2165         xfs_btree_cur_t *ncur;
2166         xfs_bmbt_rec_t  nrec;
2167         xfs_btree_cur_t *pcur;
2168
2169         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2170         level = 0;
2171         nbno = NULLFSBLOCK;
2172         xfs_bmbt_disk_set_all(&nrec, &cur->bc_rec.b);
2173         ncur = NULL;
2174         pcur = cur;
2175         do {
2176                 if ((error = xfs_bmbt_insrec(pcur, level++, &nbno, &nrec, &ncur,
2177                                 &i))) {
2178                         if (pcur != cur)
2179                                 xfs_btree_del_cursor(pcur, XFS_BTREE_ERROR);
2180                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2181                         return error;
2182                 }
2183                 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
2184                 if (pcur != cur && (ncur || nbno == NULLFSBLOCK)) {
2185                         cur->bc_nlevels = pcur->bc_nlevels;
2186                         cur->bc_private.b.allocated +=
2187                                 pcur->bc_private.b.allocated;
2188                         pcur->bc_private.b.allocated = 0;
2189                         ASSERT((cur->bc_private.b.firstblock != NULLFSBLOCK) ||
2190                                (cur->bc_private.b.ip->i_d.di_flags &
2191                                 XFS_DIFLAG_REALTIME));
2192                         cur->bc_private.b.firstblock =
2193                                 pcur->bc_private.b.firstblock;
2194                         ASSERT(cur->bc_private.b.flist ==
2195                                pcur->bc_private.b.flist);
2196                         xfs_btree_del_cursor(pcur, XFS_BTREE_NOERROR);
2197                 }
2198                 if (ncur) {
2199                         pcur = ncur;
2200                         ncur = NULL;
2201                 }
2202         } while (nbno != NULLFSBLOCK);
2203         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2204         *stat = i;
2205         return 0;
2206 error0:
2207         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2208         return error;
2209 }
2210
2211 /*
2212  * Log fields from the btree block header.
2213  */
2214 void
2215 xfs_bmbt_log_block(
2216         xfs_btree_cur_t         *cur,
2217         xfs_buf_t               *bp,
2218         int                     fields)
2219 {
2220         int                     first;
2221 #ifdef XFS_BMBT_TRACE
2222         static char             fname[] = "xfs_bmbt_log_block";
2223 #endif
2224         int                     last;
2225         xfs_trans_t             *tp;
2226         static const short      offsets[] = {
2227                 offsetof(xfs_bmbt_block_t, bb_magic),
2228                 offsetof(xfs_bmbt_block_t, bb_level),
2229                 offsetof(xfs_bmbt_block_t, bb_numrecs),
2230                 offsetof(xfs_bmbt_block_t, bb_leftsib),
2231                 offsetof(xfs_bmbt_block_t, bb_rightsib),
2232                 sizeof(xfs_bmbt_block_t)
2233         };
2234
2235         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2236         XFS_BMBT_TRACE_ARGBI(cur, bp, fields);
2237         tp = cur->bc_tp;
2238         if (bp) {
2239                 xfs_btree_offsets(fields, offsets, XFS_BB_NUM_BITS, &first,
2240                                   &last);
2241                 xfs_trans_log_buf(tp, bp, first, last);
2242         } else
2243                 xfs_trans_log_inode(tp, cur->bc_private.b.ip,
2244                         XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
2245         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2246 }
2247
2248 /*
2249  * Log record values from the btree block.
2250  */
2251 void
2252 xfs_bmbt_log_recs(
2253         xfs_btree_cur_t         *cur,
2254         xfs_buf_t               *bp,
2255         int                     rfirst,
2256         int                     rlast)
2257 {
2258         xfs_bmbt_block_t        *block;
2259         int                     first;
2260 #ifdef XFS_BMBT_TRACE
2261         static char             fname[] = "xfs_bmbt_log_recs";
2262 #endif
2263         int                     last;
2264         xfs_bmbt_rec_t          *rp;
2265         xfs_trans_t             *tp;
2266
2267         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2268         XFS_BMBT_TRACE_ARGBII(cur, bp, rfirst, rlast);
2269         ASSERT(bp);
2270         tp = cur->bc_tp;
2271         block = XFS_BUF_TO_BMBT_BLOCK(bp);
2272         rp = XFS_BMAP_REC_DADDR(block, 1, cur);
2273         first = (int)((xfs_caddr_t)&rp[rfirst - 1] - (xfs_caddr_t)block);
2274         last = (int)(((xfs_caddr_t)&rp[rlast] - 1) - (xfs_caddr_t)block);
2275         xfs_trans_log_buf(tp, bp, first, last);
2276         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2277 }
2278
2279 int                                     /* error */
2280 xfs_bmbt_lookup_eq(
2281         xfs_btree_cur_t *cur,
2282         xfs_fileoff_t   off,
2283         xfs_fsblock_t   bno,
2284         xfs_filblks_t   len,
2285         int             *stat)          /* success/failure */
2286 {
2287         cur->bc_rec.b.br_startoff = off;
2288         cur->bc_rec.b.br_startblock = bno;
2289         cur->bc_rec.b.br_blockcount = len;
2290         return xfs_bmbt_lookup(cur, XFS_LOOKUP_EQ, stat);
2291 }
2292
2293 int                                     /* error */
2294 xfs_bmbt_lookup_ge(
2295         xfs_btree_cur_t *cur,
2296         xfs_fileoff_t   off,
2297         xfs_fsblock_t   bno,
2298         xfs_filblks_t   len,
2299         int             *stat)          /* success/failure */
2300 {
2301         cur->bc_rec.b.br_startoff = off;
2302         cur->bc_rec.b.br_startblock = bno;
2303         cur->bc_rec.b.br_blockcount = len;
2304         return xfs_bmbt_lookup(cur, XFS_LOOKUP_GE, stat);
2305 }
2306
2307 /*
2308  * Give the bmap btree a new root block.  Copy the old broot contents
2309  * down into a real block and make the broot point to it.
2310  */
2311 int                                             /* error */
2312 xfs_bmbt_newroot(
2313         xfs_btree_cur_t         *cur,           /* btree cursor */
2314         int                     *logflags,      /* logging flags for inode */
2315         int                     *stat)          /* return status - 0 fail */
2316 {
2317         xfs_alloc_arg_t         args;           /* allocation arguments */
2318         xfs_bmbt_block_t        *block;         /* bmap btree block */
2319         xfs_buf_t               *bp;            /* buffer for block */
2320         xfs_bmbt_block_t        *cblock;        /* child btree block */
2321         xfs_bmbt_key_t          *ckp;           /* child key pointer */
2322         xfs_bmbt_ptr_t          *cpp;           /* child ptr pointer */
2323         int                     error;          /* error return code */
2324 #ifdef XFS_BMBT_TRACE
2325         static char             fname[] = "xfs_bmbt_newroot";
2326 #endif
2327 #ifdef DEBUG
2328         int                     i;              /* loop counter */
2329 #endif
2330         xfs_bmbt_key_t          *kp;            /* pointer to bmap btree key */
2331         int                     level;          /* btree level */
2332         xfs_bmbt_ptr_t          *pp;            /* pointer to bmap block addr */
2333
2334         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2335         level = cur->bc_nlevels - 1;
2336         block = xfs_bmbt_get_block(cur, level, &bp);
2337         /*
2338          * Copy the root into a real block.
2339          */
2340         args.mp = cur->bc_mp;
2341         pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
2342         args.tp = cur->bc_tp;
2343         args.fsbno = cur->bc_private.b.firstblock;
2344         args.mod = args.minleft = args.alignment = args.total = args.isfl =
2345                 args.userdata = args.minalignslop = 0;
2346         args.minlen = args.maxlen = args.prod = 1;
2347         args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
2348         args.firstblock = args.fsbno;
2349         if (args.fsbno == NULLFSBLOCK) {
2350 #ifdef DEBUG
2351                 if ((error = xfs_btree_check_lptr_disk(cur, *pp, level))) {
2352                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2353                         return error;
2354                 }
2355 #endif
2356                 args.fsbno = be64_to_cpu(*pp);
2357                 args.type = XFS_ALLOCTYPE_START_BNO;
2358         } else
2359                 args.type = XFS_ALLOCTYPE_NEAR_BNO;
2360         if ((error = xfs_alloc_vextent(&args))) {
2361                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2362                 return error;
2363         }
2364         if (args.fsbno == NULLFSBLOCK) {
2365                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2366                 *stat = 0;
2367                 return 0;
2368         }
2369         ASSERT(args.len == 1);
2370         cur->bc_private.b.firstblock = args.fsbno;
2371         cur->bc_private.b.allocated++;
2372         cur->bc_private.b.ip->i_d.di_nblocks++;
2373         XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
2374                           XFS_TRANS_DQ_BCOUNT, 1L);
2375         bp = xfs_btree_get_bufl(args.mp, cur->bc_tp, args.fsbno, 0);
2376         cblock = XFS_BUF_TO_BMBT_BLOCK(bp);
2377         *cblock = *block;
2378         be16_add(&block->bb_level, 1);
2379         block->bb_numrecs = cpu_to_be16(1);
2380         cur->bc_nlevels++;
2381         cur->bc_ptrs[level + 1] = 1;
2382         kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
2383         ckp = XFS_BMAP_KEY_IADDR(cblock, 1, cur);
2384         memcpy(ckp, kp, be16_to_cpu(cblock->bb_numrecs) * sizeof(*kp));
2385         cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
2386 #ifdef DEBUG
2387         for (i = 0; i < be16_to_cpu(cblock->bb_numrecs); i++) {
2388                 if ((error = xfs_btree_check_lptr_disk(cur, pp[i], level))) {
2389                         XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2390                         return error;
2391                 }
2392         }
2393 #endif
2394         memcpy(cpp, pp, be16_to_cpu(cblock->bb_numrecs) * sizeof(*pp));
2395 #ifdef DEBUG
2396         if ((error = xfs_btree_check_lptr(cur, args.fsbno, level))) {
2397                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2398                 return error;
2399         }
2400 #endif
2401         *pp = cpu_to_be64(args.fsbno);
2402         xfs_iroot_realloc(cur->bc_private.b.ip, 1 - be16_to_cpu(cblock->bb_numrecs),
2403                 cur->bc_private.b.whichfork);
2404         xfs_btree_setbuf(cur, level, bp);
2405         /*
2406          * Do all this logging at the end so that
2407          * the root is at the right level.
2408          */
2409         xfs_bmbt_log_block(cur, bp, XFS_BB_ALL_BITS);
2410         xfs_bmbt_log_keys(cur, bp, 1, be16_to_cpu(cblock->bb_numrecs));
2411         xfs_bmbt_log_ptrs(cur, bp, 1, be16_to_cpu(cblock->bb_numrecs));
2412         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2413         *logflags |=
2414                 XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork);
2415         *stat = 1;
2416         return 0;
2417 }
2418
2419 /*
2420  * Set all the fields in a bmap extent record from the uncompressed form.
2421  */
2422 void
2423 xfs_bmbt_set_all(
2424         xfs_bmbt_rec_t  *r,
2425         xfs_bmbt_irec_t *s)
2426 {
2427         int     extent_flag;
2428
2429         ASSERT((s->br_state == XFS_EXT_NORM) ||
2430                 (s->br_state == XFS_EXT_UNWRITTEN));
2431         extent_flag = (s->br_state == XFS_EXT_NORM) ? 0 : 1;
2432         ASSERT((s->br_startoff & XFS_MASK64HI(9)) == 0);
2433         ASSERT((s->br_blockcount & XFS_MASK64HI(43)) == 0);
2434 #if XFS_BIG_BLKNOS
2435         ASSERT((s->br_startblock & XFS_MASK64HI(12)) == 0);
2436         r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2437                  ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
2438                  ((xfs_bmbt_rec_base_t)s->br_startblock >> 43);
2439         r->l1 = ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2440                  ((xfs_bmbt_rec_base_t)s->br_blockcount &
2441                  (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2442 #else   /* !XFS_BIG_BLKNOS */
2443         if (ISNULLSTARTBLOCK(s->br_startblock)) {
2444                 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2445                         ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
2446                           (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2447                 r->l1 = XFS_MASK64HI(11) |
2448                           ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2449                           ((xfs_bmbt_rec_base_t)s->br_blockcount &
2450                            (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2451         } else {
2452                 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2453                         ((xfs_bmbt_rec_base_t)s->br_startoff << 9);
2454                 r->l1 = ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2455                           ((xfs_bmbt_rec_base_t)s->br_blockcount &
2456                            (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2457         }
2458 #endif  /* XFS_BIG_BLKNOS */
2459 }
2460
2461 /*
2462  * Set all the fields in a bmap extent record from the arguments.
2463  */
2464 void
2465 xfs_bmbt_set_allf(
2466         xfs_bmbt_rec_t  *r,
2467         xfs_fileoff_t   o,
2468         xfs_fsblock_t   b,
2469         xfs_filblks_t   c,
2470         xfs_exntst_t    v)
2471 {
2472         int     extent_flag;
2473
2474         ASSERT((v == XFS_EXT_NORM) || (v == XFS_EXT_UNWRITTEN));
2475         extent_flag = (v == XFS_EXT_NORM) ? 0 : 1;
2476         ASSERT((o & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
2477         ASSERT((c & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
2478 #if XFS_BIG_BLKNOS
2479         ASSERT((b & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
2480         r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2481                 ((xfs_bmbt_rec_base_t)o << 9) |
2482                 ((xfs_bmbt_rec_base_t)b >> 43);
2483         r->l1 = ((xfs_bmbt_rec_base_t)b << 21) |
2484                 ((xfs_bmbt_rec_base_t)c &
2485                 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2486 #else   /* !XFS_BIG_BLKNOS */
2487         if (ISNULLSTARTBLOCK(b)) {
2488                 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2489                         ((xfs_bmbt_rec_base_t)o << 9) |
2490                          (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2491                 r->l1 = XFS_MASK64HI(11) |
2492                           ((xfs_bmbt_rec_base_t)b << 21) |
2493                           ((xfs_bmbt_rec_base_t)c &
2494                            (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2495         } else {
2496                 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2497                         ((xfs_bmbt_rec_base_t)o << 9);
2498                 r->l1 = ((xfs_bmbt_rec_base_t)b << 21) |
2499                          ((xfs_bmbt_rec_base_t)c &
2500                          (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2501         }
2502 #endif  /* XFS_BIG_BLKNOS */
2503 }
2504
2505 #ifndef XFS_NATIVE_HOST
2506 /*
2507  * Set all the fields in a bmap extent record from the uncompressed form.
2508  */
2509 void
2510 xfs_bmbt_disk_set_all(
2511         xfs_bmbt_rec_t  *r,
2512         xfs_bmbt_irec_t *s)
2513 {
2514         int     extent_flag;
2515
2516         ASSERT((s->br_state == XFS_EXT_NORM) ||
2517                 (s->br_state == XFS_EXT_UNWRITTEN));
2518         extent_flag = (s->br_state == XFS_EXT_NORM) ? 0 : 1;
2519         ASSERT((s->br_startoff & XFS_MASK64HI(9)) == 0);
2520         ASSERT((s->br_blockcount & XFS_MASK64HI(43)) == 0);
2521 #if XFS_BIG_BLKNOS
2522         ASSERT((s->br_startblock & XFS_MASK64HI(12)) == 0);
2523         INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2524                   ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
2525                   ((xfs_bmbt_rec_base_t)s->br_startblock >> 43));
2526         INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2527                   ((xfs_bmbt_rec_base_t)s->br_blockcount &
2528                    (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2529 #else   /* !XFS_BIG_BLKNOS */
2530         if (ISNULLSTARTBLOCK(s->br_startblock)) {
2531                 INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2532                         ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
2533                           (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
2534                 INT_SET(r->l1, ARCH_CONVERT, XFS_MASK64HI(11) |
2535                           ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2536                           ((xfs_bmbt_rec_base_t)s->br_blockcount &
2537                            (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2538         } else {
2539                 INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2540                         ((xfs_bmbt_rec_base_t)s->br_startoff << 9));
2541                 INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2542                           ((xfs_bmbt_rec_base_t)s->br_blockcount &
2543                            (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2544         }
2545 #endif  /* XFS_BIG_BLKNOS */
2546 }
2547
2548 /*
2549  * Set all the fields in a disk format bmap extent record from the arguments.
2550  */
2551 void
2552 xfs_bmbt_disk_set_allf(
2553         xfs_bmbt_rec_t  *r,
2554         xfs_fileoff_t   o,
2555         xfs_fsblock_t   b,
2556         xfs_filblks_t   c,
2557         xfs_exntst_t    v)
2558 {
2559         int     extent_flag;
2560
2561         ASSERT((v == XFS_EXT_NORM) || (v == XFS_EXT_UNWRITTEN));
2562         extent_flag = (v == XFS_EXT_NORM) ? 0 : 1;
2563         ASSERT((o & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
2564         ASSERT((c & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
2565 #if XFS_BIG_BLKNOS
2566         ASSERT((b & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
2567         INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2568                 ((xfs_bmbt_rec_base_t)o << 9) |
2569                 ((xfs_bmbt_rec_base_t)b >> 43));
2570         INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)b << 21) |
2571                   ((xfs_bmbt_rec_base_t)c &
2572                    (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2573 #else   /* !XFS_BIG_BLKNOS */
2574         if (ISNULLSTARTBLOCK(b)) {
2575                 INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2576                         ((xfs_bmbt_rec_base_t)o << 9) |
2577                          (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
2578                 INT_SET(r->l1, ARCH_CONVERT, XFS_MASK64HI(11) |
2579                           ((xfs_bmbt_rec_base_t)b << 21) |
2580                           ((xfs_bmbt_rec_base_t)c &
2581                            (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2582         } else {
2583                 INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2584                         ((xfs_bmbt_rec_base_t)o << 9));
2585                 INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)b << 21) |
2586                           ((xfs_bmbt_rec_base_t)c &
2587                            (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2588         }
2589 #endif  /* XFS_BIG_BLKNOS */
2590 }
2591 #endif /* XFS_NATIVE_HOST */
2592
2593 /*
2594  * Set the blockcount field in a bmap extent record.
2595  */
2596 void
2597 xfs_bmbt_set_blockcount(
2598         xfs_bmbt_rec_t  *r,
2599         xfs_filblks_t   v)
2600 {
2601         ASSERT((v & XFS_MASK64HI(43)) == 0);
2602         r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) |
2603                   (xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21));
2604 }
2605
2606 /*
2607  * Set the startblock field in a bmap extent record.
2608  */
2609 void
2610 xfs_bmbt_set_startblock(
2611         xfs_bmbt_rec_t  *r,
2612         xfs_fsblock_t   v)
2613 {
2614 #if XFS_BIG_BLKNOS
2615         ASSERT((v & XFS_MASK64HI(12)) == 0);
2616         r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(55)) |
2617                   (xfs_bmbt_rec_base_t)(v >> 43);
2618         r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)) |
2619                   (xfs_bmbt_rec_base_t)(v << 21);
2620 #else   /* !XFS_BIG_BLKNOS */
2621         if (ISNULLSTARTBLOCK(v)) {
2622                 r->l0 |= (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2623                 r->l1 = (xfs_bmbt_rec_base_t)XFS_MASK64HI(11) |
2624                           ((xfs_bmbt_rec_base_t)v << 21) |
2625                           (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2626         } else {
2627                 r->l0 &= ~(xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2628                 r->l1 = ((xfs_bmbt_rec_base_t)v << 21) |
2629                           (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2630         }
2631 #endif  /* XFS_BIG_BLKNOS */
2632 }
2633
2634 /*
2635  * Set the startoff field in a bmap extent record.
2636  */
2637 void
2638 xfs_bmbt_set_startoff(
2639         xfs_bmbt_rec_t  *r,
2640         xfs_fileoff_t   v)
2641 {
2642         ASSERT((v & XFS_MASK64HI(9)) == 0);
2643         r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) XFS_MASK64HI(1)) |
2644                 ((xfs_bmbt_rec_base_t)v << 9) |
2645                   (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
2646 }
2647
2648 /*
2649  * Set the extent state field in a bmap extent record.
2650  */
2651 void
2652 xfs_bmbt_set_state(
2653         xfs_bmbt_rec_t  *r,
2654         xfs_exntst_t    v)
2655 {
2656         ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN);
2657         if (v == XFS_EXT_NORM)
2658                 r->l0 &= XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN);
2659         else
2660                 r->l0 |= XFS_MASK64HI(BMBT_EXNTFLAG_BITLEN);
2661 }
2662
2663 /*
2664  * Convert in-memory form of btree root to on-disk form.
2665  */
2666 void
2667 xfs_bmbt_to_bmdr(
2668         xfs_bmbt_block_t        *rblock,
2669         int                     rblocklen,
2670         xfs_bmdr_block_t        *dblock,
2671         int                     dblocklen)
2672 {
2673         int                     dmxr;
2674         xfs_bmbt_key_t          *fkp;
2675         __be64                  *fpp;
2676         xfs_bmbt_key_t          *tkp;
2677         __be64                  *tpp;
2678
2679         ASSERT(be32_to_cpu(rblock->bb_magic) == XFS_BMAP_MAGIC);
2680         ASSERT(be64_to_cpu(rblock->bb_leftsib) == NULLDFSBNO);
2681         ASSERT(be64_to_cpu(rblock->bb_rightsib) == NULLDFSBNO);
2682         ASSERT(be16_to_cpu(rblock->bb_level) > 0);
2683         dblock->bb_level = rblock->bb_level;
2684         dblock->bb_numrecs = rblock->bb_numrecs;
2685         dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0);
2686         fkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen);
2687         tkp = XFS_BTREE_KEY_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
2688         fpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen);
2689         tpp = XFS_BTREE_PTR_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
2690         dmxr = be16_to_cpu(dblock->bb_numrecs);
2691         memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
2692         memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
2693 }
2694
2695 /*
2696  * Update the record to the passed values.
2697  */
2698 int
2699 xfs_bmbt_update(
2700         xfs_btree_cur_t         *cur,
2701         xfs_fileoff_t           off,
2702         xfs_fsblock_t           bno,
2703         xfs_filblks_t           len,
2704         xfs_exntst_t            state)
2705 {
2706         xfs_bmbt_block_t        *block;
2707         xfs_buf_t               *bp;
2708         int                     error;
2709 #ifdef XFS_BMBT_TRACE
2710         static char             fname[] = "xfs_bmbt_update";
2711 #endif
2712         xfs_bmbt_key_t          key;
2713         int                     ptr;
2714         xfs_bmbt_rec_t          *rp;
2715
2716         XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2717         XFS_BMBT_TRACE_ARGFFFI(cur, (xfs_dfiloff_t)off, (xfs_dfsbno_t)bno,
2718                 (xfs_dfilblks_t)len, (int)state);
2719         block = xfs_bmbt_get_block(cur, 0, &bp);
2720 #ifdef DEBUG
2721         if ((error = xfs_btree_check_lblock(cur, block, 0, bp))) {
2722                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2723                 return error;
2724         }
2725 #endif
2726         ptr = cur->bc_ptrs[0];
2727         rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
2728         xfs_bmbt_disk_set_allf(rp, off, bno, len, state);
2729         xfs_bmbt_log_recs(cur, bp, ptr, ptr);
2730         if (ptr > 1) {
2731                 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2732                 return 0;
2733         }
2734         key.br_startoff = cpu_to_be64(off);
2735         if ((error = xfs_bmbt_updkey(cur, &key, 1))) {
2736                 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2737                 return error;
2738         }
2739         XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2740         return 0;
2741 }
2742
2743 /*
2744  * Check extent records, which have just been read, for
2745  * any bit in the extent flag field. ASSERT on debug
2746  * kernels, as this condition should not occur.
2747  * Return an error condition (1) if any flags found,
2748  * otherwise return 0.
2749  */
2750
2751 int
2752 xfs_check_nostate_extents(
2753         xfs_ifork_t             *ifp,
2754         xfs_extnum_t            idx,
2755         xfs_extnum_t            num)
2756 {
2757         xfs_bmbt_rec_t          *ep;
2758
2759         for (; num > 0; num--, idx++) {
2760                 ep = xfs_iext_get_ext(ifp, idx);
2761                 if ((ep->l0 >>
2762                      (64 - BMBT_EXNTFLAG_BITLEN)) != 0) {
2763                         ASSERT(0);
2764                         return 1;
2765                 }
2766         }
2767         return 0;
2768 }