fs/xfs/xfs_itable.c

   1 /*
   2  * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #include "xfs.h"
  34 #include "xfs_macros.h"
  35 #include "xfs_types.h"
  36 #include "xfs_inum.h"
  37 #include "xfs_log.h"
  38 #include "xfs_trans.h"
  39 #include "xfs_sb.h"
  40 #include "xfs_dir.h"
  41 #include "xfs_dir2.h"
  42 #include "xfs_dmapi.h"
  43 #include "xfs_mount.h"
  44 #include "xfs_ag.h"
  45 #include "xfs_alloc_btree.h"
  46 #include "xfs_bmap_btree.h"
  47 #include "xfs_ialloc_btree.h"
  48 #include "xfs_btree.h"
  49 #include "xfs_attr_sf.h"
  50 #include "xfs_dir_sf.h"
  51 #include "xfs_dir2_sf.h"
  52 #include "xfs_dinode.h"
  53 #include "xfs_inode.h"
  54 #include "xfs_ialloc.h"
  55 #include "xfs_itable.h"
  56 #include "xfs_error.h"
  57
  58 #ifndef HAVE_USERACC
  59 #define useracc(ubuffer, size, flags, foo) (0)
  60 #define unuseracc(ubuffer, size, flags)
  61 #endif
  62
  63 /*
  64  * Return stat information for one inode.
  65  * Return 0 if ok, else errno.
  66  */
  67 int                             /* error status */
  68 xfs_bulkstat_one(
  69         xfs_mount_t     *mp,            /* mount point for filesystem */
  70         xfs_ino_t       ino,            /* inode number to get data for */
  71         void            __user *buffer, /* buffer to place output in */
  72         int             ubsize,         /* size of buffer */
  73         void            *private_data,  /* my private data */
  74         xfs_daddr_t     bno,            /* starting bno of inode cluster */
  75         int             *ubused,        /* bytes used by me */
  76         void            *dibuff,        /* on-disk inode buffer */
  77         int             *stat)          /* BULKSTAT_RV_... */
  78 {
  79         xfs_bstat_t     *buf;           /* return buffer */
  80         int             error;          /* error value */
  81         xfs_dinode_t    *dip;           /* dinode inode pointer */
  82         xfs_dinode_core_t *dic;         /* dinode core info pointer */
  83         xfs_inode_t     *ip = NULL;     /* incore inode pointer */
  84         xfs_arch_t      arch;           /* these are set according to      */
  85
  86         dip = (xfs_dinode_t *)dibuff;
  87
  88         if (!buffer || ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
  89             (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
  90              (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino))) {
  91                 *stat = BULKSTAT_RV_NOTHING;
  92                 return XFS_ERROR(EINVAL);
  93         }
  94         if (ubsize < sizeof(*buf)) {
  95                 *stat = BULKSTAT_RV_NOTHING;
  96                 return XFS_ERROR(ENOMEM);
  97         }
  98
  99         buf = kmem_alloc(sizeof(*buf), KM_SLEEP);
 100
 101         if (dip == NULL) {
 102                 /* We're not being passed a pointer to a dinode.  This happens
 103                  * if BULKSTAT_FG_IGET is selected.  Do the iget.
 104                  */
 105                 error = xfs_iget(mp, NULL, ino, XFS_ILOCK_SHARED, &ip, bno);
 106                 if (error) {
 107                         *stat = BULKSTAT_RV_NOTHING;
 108                         return error;
 109                 }
 110                 ASSERT(ip != NULL);
 111                 ASSERT(ip->i_blkno != (xfs_daddr_t)0);
 112                 if (ip->i_d.di_mode == 0) {
 113                         xfs_iput_new(ip, XFS_ILOCK_SHARED);
 114                         *stat = BULKSTAT_RV_NOTHING;
 115                         kmem_free(buf, sizeof(*buf));
 116                         return XFS_ERROR(ENOENT);
 117                 }
 118                 dic = &ip->i_d;
 119                 arch = ARCH_NOCONVERT;          /* in-core! */
 120                 ASSERT(dic != NULL);
 121
 122                 /* xfs_iget returns the following without needing
 123                  * further change.
 124                  */
 125                 buf->bs_nlink = dic->di_nlink;
 126                 buf->bs_projid = dic->di_projid;
 127
 128         } else {
 129                 dic = &dip->di_core;
 130                 ASSERT(dic != NULL);
 131
 132                 /* buffer dinode_core is in on-disk arch */
 133                 arch = ARCH_CONVERT;
 134
 135                 /*
 136                  * The inode format changed when we moved the link count and
 137                  * made it 32 bits long.  If this is an old format inode,
 138                  * convert it in memory to look like a new one.  If it gets
 139                  * flushed to disk we will convert back before flushing or
 140                  * logging it.  We zero out the new projid field and the old link
 141                  * count field.  We'll handle clearing the pad field (the remains
 142                  * of the old uuid field) when we actually convert the inode to
 143                  * the new format. We don't change the version number so that we
 144                  * can distinguish this from a real new format inode.
 145                  */
 146                 if (INT_GET(dic->di_version, arch) == XFS_DINODE_VERSION_1) {
 147                         buf->bs_nlink = INT_GET(dic->di_onlink, arch);
 148                         buf->bs_projid = 0;
 149                 }
 150                 else {
 151                         buf->bs_nlink = INT_GET(dic->di_nlink, arch);
 152                         buf->bs_projid = INT_GET(dic->di_projid, arch);
 153                 }
 154
 155         }
 156
 157         buf->bs_ino = ino;
 158         buf->bs_mode = INT_GET(dic->di_mode, arch);
 159         buf->bs_uid = INT_GET(dic->di_uid, arch);
 160         buf->bs_gid = INT_GET(dic->di_gid, arch);
 161         buf->bs_size = INT_GET(dic->di_size, arch);
 162         buf->bs_atime.tv_sec = INT_GET(dic->di_atime.t_sec, arch);
 163         buf->bs_atime.tv_nsec = INT_GET(dic->di_atime.t_nsec, arch);
 164         buf->bs_mtime.tv_sec = INT_GET(dic->di_mtime.t_sec, arch);
 165         buf->bs_mtime.tv_nsec = INT_GET(dic->di_mtime.t_nsec, arch);
 166         buf->bs_ctime.tv_sec = INT_GET(dic->di_ctime.t_sec, arch);
 167         buf->bs_ctime.tv_nsec = INT_GET(dic->di_ctime.t_nsec, arch);
 168         buf->bs_xflags = xfs_dic2xflags(dic, arch);
 169         buf->bs_extsize = INT_GET(dic->di_extsize, arch) << mp->m_sb.sb_blocklog;
 170         buf->bs_extents = INT_GET(dic->di_nextents, arch);
 171         buf->bs_gen = INT_GET(dic->di_gen, arch);
 172         memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
 173         buf->bs_dmevmask = INT_GET(dic->di_dmevmask, arch);
 174         buf->bs_dmstate = INT_GET(dic->di_dmstate, arch);
 175         buf->bs_aextents = INT_GET(dic->di_anextents, arch);
 176
 177         switch (INT_GET(dic->di_format, arch)) {
 178         case XFS_DINODE_FMT_DEV:
 179                 if ( ip ) {
 180                         buf->bs_rdev = ip->i_df.if_u2.if_rdev;
 181                 } else {
 182                         buf->bs_rdev = INT_GET(dip->di_u.di_dev, arch);
 183                 }
 184
 185                 buf->bs_blksize = BLKDEV_IOSIZE;
 186                 buf->bs_blocks = 0;
 187                 break;
 188         case XFS_DINODE_FMT_LOCAL:
 189         case XFS_DINODE_FMT_UUID:
 190                 buf->bs_rdev = 0;
 191                 buf->bs_blksize = mp->m_sb.sb_blocksize;
 192                 buf->bs_blocks = 0;
 193                 break;
 194         case XFS_DINODE_FMT_EXTENTS:
 195         case XFS_DINODE_FMT_BTREE:
 196                 buf->bs_rdev = 0;
 197                 buf->bs_blksize = mp->m_sb.sb_blocksize;
 198                 if ( ip ) {
 199                         buf->bs_blocks = INT_GET(dic->di_nblocks, arch) + ip->i_delayed_blks;
 200                 } else {
 201                         buf->bs_blocks = INT_GET(dic->di_nblocks, arch);
 202                 }
 203                 break;
 204         }
 205
 206         if (ip) {
 207                 xfs_iput(ip, XFS_ILOCK_SHARED);
 208         }
 209
 210         if (copy_to_user(buffer, buf, sizeof(*buf)))  {
 211                 kmem_free(buf, sizeof(*buf));
 212                 *stat = BULKSTAT_RV_NOTHING;
 213                 return EFAULT;
 214         }
 215
 216         kmem_free(buf, sizeof(*buf));
 217         *stat = BULKSTAT_RV_DIDONE;
 218         if (ubused)
 219                 *ubused = sizeof(*buf);
 220         return 0;
 221 }
 222
 223 /*
 224  * Return stat information in bulk (by-inode) for the filesystem.
 225  */
 226 int                                     /* error status */
 227 xfs_bulkstat(
 228         xfs_mount_t             *mp,    /* mount point for filesystem */
 229         xfs_ino_t               *lastinop, /* last inode returned */
 230         int                     *ubcountp, /* size of buffer/count returned */
 231         bulkstat_one_pf         formatter, /* func that'd fill a single buf */
 232         void                    *private_data,/* private data for formatter */
 233         size_t                  statstruct_size, /* sizeof struct filling */
 234         char                    __user *ubuffer, /* buffer with inode stats */
 235         int                     flags,  /* defined in xfs_itable.h */
 236         int                     *done)  /* 1 if there're more stats to get */
 237 {
 238         xfs_agblock_t           agbno=0;/* allocation group block number */
 239         xfs_buf_t               *agbp;  /* agi header buffer */
 240         xfs_agi_t               *agi;   /* agi header data */
 241         xfs_agino_t             agino;  /* inode # in allocation group */
 242         xfs_agnumber_t          agno;   /* allocation group number */
 243         xfs_daddr_t             bno;    /* inode cluster start daddr */
 244         int                     chunkidx; /* current index into inode chunk */
 245         int                     clustidx; /* current index into inode cluster */
 246         xfs_btree_cur_t         *cur;   /* btree cursor for ialloc btree */
 247         int                     end_of_ag; /* set if we've seen the ag end */
 248         int                     error;  /* error code */
 249         int                     fmterror;/* bulkstat formatter result */
 250         __int32_t               gcnt;   /* current btree rec's count */
 251         xfs_inofree_t           gfree;  /* current btree rec's free mask */
 252         xfs_agino_t             gino;   /* current btree rec's start inode */
 253         int                     i;      /* loop index */
 254         int                     icount; /* count of inodes good in irbuf */
 255         xfs_ino_t               ino;    /* inode number (filesystem) */
 256         xfs_inobt_rec_t         *irbp;  /* current irec buffer pointer */
 257         xfs_inobt_rec_t         *irbuf; /* start of irec buffer */
 258         xfs_inobt_rec_t         *irbufend; /* end of good irec buffer entries */
 259         xfs_ino_t               lastino=0; /* last inode number returned */
 260         int                     nbcluster; /* # of blocks in a cluster */
 261         int                     nicluster; /* # of inodes in a cluster */
 262         int                     nimask; /* mask for inode clusters */
 263         int                     nirbuf; /* size of irbuf */
 264         int                     rval;   /* return value error code */
 265         int                     tmp;    /* result value from btree calls */
 266         int                     ubcount; /* size of user's buffer */
 267         int                     ubleft; /* bytes left in user's buffer */
 268         char                    __user *ubufp;  /* pointer into user's buffer */
 269         int                     ubelem; /* spaces used in user's buffer */
 270         int                     ubused; /* bytes used by formatter */
 271         xfs_buf_t               *bp;    /* ptr to on-disk inode cluster buf */
 272         xfs_dinode_t            *dip;   /* ptr into bp for specific inode */
 273         xfs_inode_t             *ip;    /* ptr to in-core inode struct */
 274
 275         /*
 276          * Get the last inode value, see if there's nothing to do.
 277          */
 278         ino = (xfs_ino_t)*lastinop;
 279         dip = NULL;
 280         agno = XFS_INO_TO_AGNO(mp, ino);
 281         agino = XFS_INO_TO_AGINO(mp, ino);
 282         if (agno >= mp->m_sb.sb_agcount ||
 283             ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
 284                 *done = 1;
 285                 *ubcountp = 0;
 286                 return 0;
 287         }
 288         ubcount = *ubcountp; /* statstruct's */
 289         ubleft = ubcount * statstruct_size; /* bytes */
 290         *ubcountp = ubelem = 0;
 291         *done = 0;
 292         fmterror = 0;
 293         ubufp = ubuffer;
 294         nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ?
 295                 mp->m_sb.sb_inopblock :
 296                 (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
 297         nimask = ~(nicluster - 1);
 298         nbcluster = nicluster >> mp->m_sb.sb_inopblog;
 299         /*
 300          * Lock down the user's buffer. If a buffer was not sent, as in the case
 301          * disk quota code calls here, we skip this.
 302          */
 303         if (ubuffer &&
 304             (error = useracc(ubuffer, ubcount * statstruct_size,
 305                         (B_READ|B_PHYS), NULL))) {
 306                 return error;
 307         }
 308         /*
 309          * Allocate a page-sized buffer for inode btree records.
 310          * We could try allocating something smaller, but for normal
 311          * calls we'll always (potentially) need the whole page.
 312          */
 313         irbuf = kmem_alloc(NBPC, KM_SLEEP);
 314         nirbuf = NBPC / sizeof(*irbuf);
 315         /*
 316          * Loop over the allocation groups, starting from the last
 317          * inode returned; 0 means start of the allocation group.
 318          */
 319         rval = 0;
 320         while (ubleft >= statstruct_size && agno < mp->m_sb.sb_agcount) {
 321                 bp = NULL;
 322                 down_read(&mp->m_peraglock);
 323                 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
 324                 up_read(&mp->m_peraglock);
 325                 if (error) {
 326                         /*
 327                          * Skip this allocation group and go to the next one.
 328                          */
 329                         agno++;
 330                         agino = 0;
 331                         continue;
 332                 }
 333                 agi = XFS_BUF_TO_AGI(agbp);
 334                 /*
 335                  * Allocate and initialize a btree cursor for ialloc btree.
 336                  */
 337                 cur = xfs_btree_init_cursor(mp, NULL, agbp, agno, XFS_BTNUM_INO,
 338                         (xfs_inode_t *)0, 0);
 339                 irbp = irbuf;
 340                 irbufend = irbuf + nirbuf;
 341                 end_of_ag = 0;
 342                 /*
 343                  * If we're returning in the middle of an allocation group,
 344                  * we need to get the remainder of the chunk we're in.
 345                  */
 346                 if (agino > 0) {
 347                         /*
 348                          * Lookup the inode chunk that this inode lives in.
 349                          */
 350                         error = xfs_inobt_lookup_le(cur, agino, 0, 0, &tmp);
 351                         if (!error &&   /* no I/O error */
 352                             tmp &&      /* lookup succeeded */
 353                                         /* got the record, should always work */
 354                             !(error = xfs_inobt_get_rec(cur, &gino, &gcnt,
 355                                     &gfree, &i, ARCH_NOCONVERT)) &&
 356                             i == 1 &&
 357                                         /* this is the right chunk */
 358                             agino < gino + XFS_INODES_PER_CHUNK &&
 359                                         /* lastino was not last in chunk */
 360                             (chunkidx = agino - gino + 1) <
 361                                     XFS_INODES_PER_CHUNK &&
 362                                         /* there are some left allocated */
 363                             XFS_INOBT_MASKN(chunkidx,
 364                                     XFS_INODES_PER_CHUNK - chunkidx) & ~gfree) {
 365                                 /*
 366                                  * Grab the chunk record.  Mark all the
 367                                  * uninteresting inodes (because they're
 368                                  * before our start point) free.
 369                                  */
 370                                 for (i = 0; i < chunkidx; i++) {
 371                                         if (XFS_INOBT_MASK(i) & ~gfree)
 372                                                 gcnt++;
 373                                 }
 374                                 gfree |= XFS_INOBT_MASKN(0, chunkidx);
 375                                 INT_SET(irbp->ir_startino, ARCH_CONVERT, gino);
 376                                 INT_SET(irbp->ir_freecount, ARCH_CONVERT, gcnt);
 377                                 INT_SET(irbp->ir_free, ARCH_CONVERT, gfree);
 378                                 irbp++;
 379                                 agino = gino + XFS_INODES_PER_CHUNK;
 380                                 icount = XFS_INODES_PER_CHUNK - gcnt;
 381                         } else {
 382                                 /*
 383                                  * If any of those tests failed, bump the
 384                                  * inode number (just in case).
 385                                  */
 386                                 agino++;
 387                                 icount = 0;
 388                         }
 389                         /*
 390                          * In any case, increment to the next record.
 391                          */
 392                         if (!error)
 393                                 error = xfs_inobt_increment(cur, 0, &tmp);
 394                 } else {
 395                         /*
 396                          * Start of ag.  Lookup the first inode chunk.
 397                          */
 398                         error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &tmp);
 399                         icount = 0;
 400                 }
 401                 /*
 402                  * Loop through inode btree records in this ag,
 403                  * until we run out of inodes or space in the buffer.
 404                  */
 405                 while (irbp < irbufend && icount < ubcount) {
 406                         /*
 407                          * Loop as long as we're unable to read the
 408                          * inode btree.
 409                          */
 410                         while (error) {
 411                                 agino += XFS_INODES_PER_CHUNK;
 412                                 if (XFS_AGINO_TO_AGBNO(mp, agino) >=
 413                                                 INT_GET(agi->agi_length, ARCH_CONVERT))
 414                                         break;
 415                                 error = xfs_inobt_lookup_ge(cur, agino, 0, 0,
 416                                                             &tmp);
 417                         }
 418                         /*
 419                          * If ran off the end of the ag either with an error,
 420                          * or the normal way, set end and stop collecting.
 421                          */
 422                         if (error ||
 423                             (error = xfs_inobt_get_rec(cur, &gino, &gcnt,
 424                                     &gfree, &i, ARCH_NOCONVERT)) ||
 425                             i == 0) {
 426                                 end_of_ag = 1;
 427                                 break;
 428                         }
 429                         /*
 430                          * If this chunk has any allocated inodes, save it.
 431                          */
 432                         if (gcnt < XFS_INODES_PER_CHUNK) {
 433                                 INT_SET(irbp->ir_startino, ARCH_CONVERT, gino);
 434                                 INT_SET(irbp->ir_freecount, ARCH_CONVERT, gcnt);
 435                                 INT_SET(irbp->ir_free, ARCH_CONVERT, gfree);
 436                                 irbp++;
 437                                 icount += XFS_INODES_PER_CHUNK - gcnt;
 438                         }
 439                         /*
 440                          * Set agino to after this chunk and bump the cursor.
 441                          */
 442                         agino = gino + XFS_INODES_PER_CHUNK;
 443                         error = xfs_inobt_increment(cur, 0, &tmp);
 444                 }
 445                 /*
 446                  * Drop the btree buffers and the agi buffer.
 447                  * We can't hold any of the locks these represent
 448                  * when calling iget.
 449                  */
 450                 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
 451                 xfs_buf_relse(agbp);
 452                 /*
 453                  * Now format all the good inodes into the user's buffer.
 454                  */
 455                 irbufend = irbp;
 456                 for (irbp = irbuf;
 457                      irbp < irbufend && ubleft >= statstruct_size; irbp++) {
 458                         /*
 459                          * Read-ahead the next chunk's worth of inodes.
 460                          */
 461                         if (&irbp[1] < irbufend) {
 462                                 /*
 463                                  * Loop over all clusters in the next chunk.
 464                                  * Do a readahead if there are any allocated
 465                                  * inodes in that cluster.
 466                                  */
 467                                 for (agbno = XFS_AGINO_TO_AGBNO(mp,
 468                                                         INT_GET(irbp[1].ir_startino, ARCH_CONVERT)),
 469                                      chunkidx = 0;
 470                                      chunkidx < XFS_INODES_PER_CHUNK;
 471                                      chunkidx += nicluster,
 472                                      agbno += nbcluster) {
 473                                         if (XFS_INOBT_MASKN(chunkidx,
 474                                                             nicluster) &
 475                                             ~(INT_GET(irbp[1].ir_free, ARCH_CONVERT)))
 476                                                 xfs_btree_reada_bufs(mp, agno,
 477                                                         agbno, nbcluster);
 478                                 }
 479                         }
 480                         /*
 481                          * Now process this chunk of inodes.
 482                          */
 483                         for (agino = INT_GET(irbp->ir_startino, ARCH_CONVERT), chunkidx = 0, clustidx = 0;
 484                              ubleft > 0 &&
 485                                 INT_GET(irbp->ir_freecount, ARCH_CONVERT) < XFS_INODES_PER_CHUNK;
 486                              chunkidx++, clustidx++, agino++) {
 487                                 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
 488                                 /*
 489                                  * Recompute agbno if this is the
 490                                  * first inode of the cluster.
 491                                  *
 492                                  * Careful with clustidx.   There can be
 493                                  * multple clusters per chunk, a single
 494                                  * cluster per chunk or a cluster that has
 495                                  * inodes represented from several different
 496                                  * chunks (if blocksize is large).
 497                                  *
 498                                  * Because of this, the starting clustidx is
 499                                  * initialized to zero in this loop but must
 500                                  * later be reset after reading in the cluster
 501                                  * buffer.
 502                                  */
 503                                 if ((chunkidx & (nicluster - 1)) == 0) {
 504                                         agbno = XFS_AGINO_TO_AGBNO(mp,
 505                                                         INT_GET(irbp->ir_startino, ARCH_CONVERT)) +
 506                                                 ((chunkidx & nimask) >>
 507                                                  mp->m_sb.sb_inopblog);
 508
 509                                         if (flags & BULKSTAT_FG_QUICK) {
 510                                                 ino = XFS_AGINO_TO_INO(mp, agno,
 511                                                                        agino);
 512                                                 bno = XFS_AGB_TO_DADDR(mp, agno,
 513                                                                        agbno);
 514
 515                                                 /*
 516                                                  * Get the inode cluster buffer
 517                                                  */
 518                                                 ASSERT(xfs_inode_zone != NULL);
 519                                                 ip = kmem_zone_zalloc(xfs_inode_zone,
 520                                                                       KM_SLEEP);
 521                                                 ip->i_ino = ino;
 522                                                 ip->i_mount = mp;
 523                                                 if (bp)
 524                                                         xfs_buf_relse(bp);
 525                                                 error = xfs_itobp(mp, NULL, ip,
 526                                                                   &dip, &bp, bno);
 527                                                 if (!error)
 528                                                         clustidx = ip->i_boffset / mp->m_sb.sb_inodesize;
 529                                                 kmem_zone_free(xfs_inode_zone, ip);
 530                                                 if (XFS_TEST_ERROR(error != 0,
 531                                                                    mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK,
 532                                                                    XFS_RANDOM_BULKSTAT_READ_CHUNK)) {
 533                                                         bp = NULL;
 534                                                         break;
 535                                                 }
 536                                         }
 537                                 }
 538                                 /*
 539                                  * Skip if this inode is free.
 540                                  */
 541                                 if (XFS_INOBT_MASK(chunkidx) & INT_GET(irbp->ir_free, ARCH_CONVERT))
 542                                         continue;
 543                                 /*
 544                                  * Count used inodes as free so we can tell
 545                                  * when the chunk is used up.
 546                                  */
 547                                 INT_MOD(irbp->ir_freecount, ARCH_CONVERT, +1);
 548                                 ino = XFS_AGINO_TO_INO(mp, agno, agino);
 549                                 bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
 550                                 if (flags & BULKSTAT_FG_QUICK) {
 551                                         dip = (xfs_dinode_t *)xfs_buf_offset(bp,
 552                                               (clustidx << mp->m_sb.sb_inodelog));
 553
 554                                         if (INT_GET(dip->di_core.di_magic, ARCH_CONVERT)
 555                                                     != XFS_DINODE_MAGIC
 556                                             || !XFS_DINODE_GOOD_VERSION(
 557                                                     INT_GET(dip->di_core.di_version, ARCH_CONVERT)))
 558                                                 continue;
 559                                 }
 560
 561                                 /*
 562                                  * Get the inode and fill in a single buffer.
 563                                  * BULKSTAT_FG_QUICK uses dip to fill it in.
 564                                  * BULKSTAT_FG_IGET uses igets.
 565                                  * See: xfs_bulkstat_one & xfs_dm_bulkstat_one.
 566                                  * This is also used to count inodes/blks, etc
 567                                  * in xfs_qm_quotacheck.
 568                                  */
 569                                 ubused = statstruct_size;
 570                                 error = formatter(mp, ino, ubufp,
 571                                                 ubleft, private_data,
 572                                                 bno, &ubused, dip, &fmterror);
 573                                 if (fmterror == BULKSTAT_RV_NOTHING) {
 574                                         if (error == ENOMEM)
 575                                                 ubleft = 0;
 576                                         continue;
 577                                 }
 578                                 if (fmterror == BULKSTAT_RV_GIVEUP) {
 579                                         ubleft = 0;
 580                                         ASSERT(error);
 581                                         rval = error;
 582                                         break;
 583                                 }
 584                                 if (ubufp)
 585                                         ubufp += ubused;
 586                                 ubleft -= ubused;
 587                                 ubelem++;
 588                                 lastino = ino;
 589                         }
 590                 }
 591
 592                 if (bp)
 593                         xfs_buf_relse(bp);
 594
 595                 /*
 596                  * Set up for the next loop iteration.
 597                  */
 598                 if (ubleft > 0) {
 599                         if (end_of_ag) {
 600                                 agno++;
 601                                 agino = 0;
 602                         } else
 603                                 agino = XFS_INO_TO_AGINO(mp, lastino);
 604                 } else
 605                         break;
 606         }
 607         /*
 608          * Done, we're either out of filesystem or space to put the data.
 609          */
 610         kmem_free(irbuf, NBPC);
 611         if (ubuffer)
 612                 unuseracc(ubuffer, ubcount * statstruct_size, (B_READ|B_PHYS));
 613         *ubcountp = ubelem;
 614         if (agno >= mp->m_sb.sb_agcount) {
 615                 /*
 616                  * If we ran out of filesystem, mark lastino as off
 617                  * the end of the filesystem, so the next call
 618                  * will return immediately.
 619                  */
 620                 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
 621                 *done = 1;
 622         } else
 623                 *lastinop = (xfs_ino_t)lastino;
 624
 625         return rval;
 626 }
 627
 628 /*
 629  * Return stat information in bulk (by-inode) for the filesystem.
 630  * Special case for non-sequential one inode bulkstat.
 631  */
 632 int                                     /* error status */
 633 xfs_bulkstat_single(
 634         xfs_mount_t             *mp,    /* mount point for filesystem */
 635         xfs_ino_t               *lastinop, /* inode to return */
 636         char                    __user *buffer, /* buffer with inode stats */
 637         int                     *done)  /* 1 if there're more stats to get */
 638 {
 639         int                     count;  /* count value for bulkstat call */
 640         int                     error;  /* return value */
 641         xfs_ino_t               ino;    /* filesystem inode number */
 642         int                     res;    /* result from bs1 */
 643
 644         /*
 645          * note that requesting valid inode numbers which are not allocated
 646          * to inodes will most likely cause xfs_itobp to generate warning
 647          * messages about bad magic numbers. This is ok. The fact that
 648          * the inode isn't actually an inode is handled by the
 649          * error check below. Done this way to make the usual case faster
 650          * at the expense of the error case.
 651          */
 652
 653         ino = (xfs_ino_t)*lastinop;
 654         error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t),
 655                                  NULL, 0, NULL, NULL, &res);
 656         if (error) {
 657                 /*
 658                  * Special case way failed, do it the "long" way
 659                  * to see if that works.
 660                  */
 661                 (*lastinop)--;
 662                 count = 1;
 663                 if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
 664                                 NULL, sizeof(xfs_bstat_t), buffer,
 665                                 BULKSTAT_FG_IGET, done))
 666                         return error;
 667                 if (count == 0 || (xfs_ino_t)*lastinop != ino)
 668                         return error == EFSCORRUPTED ?
 669                                 XFS_ERROR(EINVAL) : error;
 670                 else
 671                         return 0;
 672         }
 673         *done = 0;
 674         return 0;
 675 }
 676
 677 /*
 678  * Return inode number table for the filesystem.
 679  */
 680 int                                     /* error status */
 681 xfs_inumbers(
 682         xfs_mount_t     *mp,            /* mount point for filesystem */
 683         xfs_ino_t       *lastino,       /* last inode returned */
 684         int             *count,         /* size of buffer/count returned */
 685         xfs_inogrp_t    __user *ubuffer)/* buffer with inode descriptions */
 686 {
 687         xfs_buf_t       *agbp;
 688         xfs_agino_t     agino;
 689         xfs_agnumber_t  agno;
 690         int             bcount;
 691         xfs_inogrp_t    *buffer;
 692         int             bufidx;
 693         xfs_btree_cur_t *cur;
 694         int             error;
 695         __int32_t       gcnt;
 696         xfs_inofree_t   gfree;
 697         xfs_agino_t     gino;
 698         int             i;
 699         xfs_ino_t       ino;
 700         int             left;
 701         int             tmp;
 702
 703         ino = (xfs_ino_t)*lastino;
 704         agno = XFS_INO_TO_AGNO(mp, ino);
 705         agino = XFS_INO_TO_AGINO(mp, ino);
 706         left = *count;
 707         *count = 0;
 708         bcount = MIN(left, (int)(NBPP / sizeof(*buffer)));
 709         buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
 710         error = bufidx = 0;
 711         cur = NULL;
 712         agbp = NULL;
 713         while (left > 0 && agno < mp->m_sb.sb_agcount) {
 714                 if (agbp == NULL) {
 715                         down_read(&mp->m_peraglock);
 716                         error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
 717                         up_read(&mp->m_peraglock);
 718                         if (error) {
 719                                 /*
 720                                  * If we can't read the AGI of this ag,
 721                                  * then just skip to the next one.
 722                                  */
 723                                 ASSERT(cur == NULL);
 724                                 agbp = NULL;
 725                                 agno++;
 726                                 agino = 0;
 727                                 continue;
 728                         }
 729                         cur = xfs_btree_init_cursor(mp, NULL, agbp, agno,
 730                                 XFS_BTNUM_INO, (xfs_inode_t *)0, 0);
 731                         error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp);
 732                         if (error) {
 733                                 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
 734                                 cur = NULL;
 735                                 xfs_buf_relse(agbp);
 736                                 agbp = NULL;
 737                                 /*
 738                                  * Move up the the last inode in the current
 739                                  * chunk.  The lookup_ge will always get
 740                                  * us the first inode in the next chunk.
 741                                  */
 742                                 agino += XFS_INODES_PER_CHUNK - 1;
 743                                 continue;
 744                         }
 745                 }
 746                 if ((error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree,
 747                         &i, ARCH_NOCONVERT)) ||
 748                     i == 0) {
 749                         xfs_buf_relse(agbp);
 750                         agbp = NULL;
 751                         xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
 752                         cur = NULL;
 753                         agno++;
 754                         agino = 0;
 755                         continue;
 756                 }
 757                 agino = gino + XFS_INODES_PER_CHUNK - 1;
 758                 buffer[bufidx].xi_startino = XFS_AGINO_TO_INO(mp, agno, gino);
 759                 buffer[bufidx].xi_alloccount = XFS_INODES_PER_CHUNK - gcnt;
 760                 buffer[bufidx].xi_allocmask = ~gfree;
 761                 bufidx++;
 762                 left--;
 763                 if (bufidx == bcount) {
 764                         if (copy_to_user(ubuffer, buffer,
 765                                         bufidx * sizeof(*buffer))) {
 766                                 error = XFS_ERROR(EFAULT);
 767                                 break;
 768                         }
 769                         ubuffer += bufidx;
 770                         *count += bufidx;
 771                         bufidx = 0;
 772                 }
 773                 if (left) {
 774                         error = xfs_inobt_increment(cur, 0, &tmp);
 775                         if (error) {
 776                                 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
 777                                 cur = NULL;
 778                                 xfs_buf_relse(agbp);
 779                                 agbp = NULL;
 780                                 /*
 781                                  * The agino value has already been bumped.
 782                                  * Just try to skip up to it.
 783                                  */
 784                                 agino += XFS_INODES_PER_CHUNK;
 785                                 continue;
 786                         }
 787                 }
 788         }
 789         if (!error) {
 790                 if (bufidx) {
 791                         if (copy_to_user(ubuffer, buffer,
 792                                         bufidx * sizeof(*buffer)))
 793                                 error = XFS_ERROR(EFAULT);
 794                         else
 795                                 *count += bufidx;
 796                 }
 797                 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
 798         }
 799         kmem_free(buffer, bcount * sizeof(*buffer));
 800         if (cur)
 801                 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
 802                                            XFS_BTREE_NOERROR));
 803         if (agbp)
 804                 xfs_buf_relse(agbp);
 805         return error;
 806 }