/* * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "xfs.h" #include "xfs_fs.h" #include "xfs_types.h" #include "xfs_bit.h" #include "xfs_log.h" #include "xfs_inum.h" #include "xfs_trans.h" #include "xfs_sb.h" #include "xfs_ag.h" #include "xfs_dir2.h" #include "xfs_dmapi.h" #include "xfs_mount.h" #include "xfs_bmap_btree.h" #include "xfs_alloc_btree.h" #include "xfs_ialloc_btree.h" #include "xfs_dir2_sf.h" #include "xfs_attr_sf.h" #include "xfs_dinode.h" #include "xfs_inode.h" #include "xfs_ialloc.h" #include "xfs_itable.h" #include "xfs_error.h" #include "xfs_btree.h" STATIC int xfs_bulkstat_one_iget( xfs_mount_t *mp, /* mount point for filesystem */ xfs_ino_t ino, /* inode number to get data for */ xfs_daddr_t bno, /* starting bno of inode cluster */ xfs_bstat_t *buf, /* return buffer */ int *stat) /* BULKSTAT_RV_... */ { xfs_dinode_core_t *dic; /* dinode core info pointer */ xfs_inode_t *ip; /* incore inode pointer */ bhv_vnode_t *vp; int error; error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, bno); if (error) { *stat = BULKSTAT_RV_NOTHING; return error; } ASSERT(ip != NULL); ASSERT(ip->i_blkno != (xfs_daddr_t)0); if (ip->i_d.di_mode == 0) { *stat = BULKSTAT_RV_NOTHING; error = XFS_ERROR(ENOENT); goto out_iput; } vp = XFS_ITOV(ip); dic = &ip->i_d; /* xfs_iget returns the following without needing * further change. */ buf->bs_nlink = dic->di_nlink; buf->bs_projid = dic->di_projid; buf->bs_ino = ino; buf->bs_mode = dic->di_mode; buf->bs_uid = dic->di_uid; buf->bs_gid = dic->di_gid; buf->bs_size = dic->di_size; vn_atime_to_bstime(vp, &buf->bs_atime); buf->bs_mtime.tv_sec = dic->di_mtime.t_sec; buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec; buf->bs_ctime.tv_sec = dic->di_ctime.t_sec; buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec; buf->bs_xflags = xfs_ip2xflags(ip); buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog; buf->bs_extents = dic->di_nextents; buf->bs_gen = dic->di_gen; memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); buf->bs_dmevmask = dic->di_dmevmask; buf->bs_dmstate = dic->di_dmstate; buf->bs_aextents = dic->di_anextents; switch (dic->di_format) { case XFS_DINODE_FMT_DEV: buf->bs_rdev = ip->i_df.if_u2.if_rdev; buf->bs_blksize = BLKDEV_IOSIZE; buf->bs_blocks = 0; break; case XFS_DINODE_FMT_LOCAL: case XFS_DINODE_FMT_UUID: buf->bs_rdev = 0; buf->bs_blksize = mp->m_sb.sb_blocksize; buf->bs_blocks = 0; break; case XFS_DINODE_FMT_EXTENTS: case XFS_DINODE_FMT_BTREE: buf->bs_rdev = 0; buf->bs_blksize = mp->m_sb.sb_blocksize; buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks; break; } out_iput: xfs_iput(ip, XFS_ILOCK_SHARED); return error; } STATIC int xfs_bulkstat_one_dinode( xfs_mount_t *mp, /* mount point for filesystem */ xfs_ino_t ino, /* inode number to get data for */ xfs_dinode_t *dip, /* dinode inode pointer */ xfs_bstat_t *buf) /* return buffer */ { xfs_dinode_core_t *dic; /* dinode core info pointer */ dic = &dip->di_core; /* * The inode format changed when we moved the link count and * made it 32 bits long. If this is an old format inode, * convert it in memory to look like a new one. If it gets * flushed to disk we will convert back before flushing or * logging it. We zero out the new projid field and the old link * count field. We'll handle clearing the pad field (the remains * of the old uuid field) when we actually convert the inode to * the new format. We don't change the version number so that we * can distinguish this from a real new format inode. */ if (INT_GET(dic->di_version, ARCH_CONVERT) == XFS_DINODE_VERSION_1) { buf->bs_nlink = INT_GET(dic->di_onlink, ARCH_CONVERT); buf->bs_projid = 0; } else { buf->bs_nlink = INT_GET(dic->di_nlink, ARCH_CONVERT); buf->bs_projid = INT_GET(dic->di_projid, ARCH_CONVERT); } buf->bs_ino = ino; buf->bs_mode = INT_GET(dic->di_mode, ARCH_CONVERT); buf->bs_uid = INT_GET(dic->di_uid, ARCH_CONVERT); buf->bs_gid = INT_GET(dic->di_gid, ARCH_CONVERT); buf->bs_size = INT_GET(dic->di_size, ARCH_CONVERT); buf->bs_atime.tv_sec = INT_GET(dic->di_atime.t_sec, ARCH_CONVERT); buf->bs_atime.tv_nsec = INT_GET(dic->di_atime.t_nsec, ARCH_CONVERT); buf->bs_mtime.tv_sec = INT_GET(dic->di_mtime.t_sec, ARCH_CONVERT); buf->bs_mtime.tv_nsec = INT_GET(dic->di_mtime.t_nsec, ARCH_CONVERT); buf->bs_ctime.tv_sec = INT_GET(dic->di_ctime.t_sec, ARCH_CONVERT); buf->bs_ctime.tv_nsec = INT_GET(dic->di_ctime.t_nsec, ARCH_CONVERT); buf->bs_xflags = xfs_dic2xflags(dic); buf->bs_extsize = INT_GET(dic->di_extsize, ARCH_CONVERT) << mp->m_sb.sb_blocklog; buf->bs_extents = INT_GET(dic->di_nextents, ARCH_CONVERT); buf->bs_gen = INT_GET(dic->di_gen, ARCH_CONVERT); memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); buf->bs_dmevmask = INT_GET(dic->di_dmevmask, ARCH_CONVERT); buf->bs_dmstate = INT_GET(dic->di_dmstate, ARCH_CONVERT); buf->bs_aextents = INT_GET(dic->di_anextents, ARCH_CONVERT); switch (INT_GET(dic->di_format, ARCH_CONVERT)) { case XFS_DINODE_FMT_DEV: buf->bs_rdev = INT_GET(dip->di_u.di_dev, ARCH_CONVERT); buf->bs_blksize = BLKDEV_IOSIZE; buf->bs_blocks = 0; break; case XFS_DINODE_FMT_LOCAL: case XFS_DINODE_FMT_UUID: buf->bs_rdev = 0; buf->bs_blksize = mp->m_sb.sb_blocksize; buf->bs_blocks = 0; break; case XFS_DINODE_FMT_EXTENTS: case XFS_DINODE_FMT_BTREE: buf->bs_rdev = 0; buf->bs_blksize = mp->m_sb.sb_blocksize; buf->bs_blocks = INT_GET(dic->di_nblocks, ARCH_CONVERT); break; } return 0; } /* * Return stat information for one inode. * Return 0 if ok, else errno. */ int /* error status */ xfs_bulkstat_one( xfs_mount_t *mp, /* mount point for filesystem */ xfs_ino_t ino, /* inode number to get data for */ void __user *buffer, /* buffer to place output in */ int ubsize, /* size of buffer */ void *private_data, /* my private data */ xfs_daddr_t bno, /* starting bno of inode cluster */ int *ubused, /* bytes used by me */ void *dibuff, /* on-disk inode buffer */ int *stat) /* BULKSTAT_RV_... */ { xfs_bstat_t *buf; /* return buffer */ int error = 0; /* error value */ xfs_dinode_t *dip; /* dinode inode pointer */ dip = (xfs_dinode_t *)dibuff; if (!buffer || ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino || (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) && (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino))) { *stat = BULKSTAT_RV_NOTHING; return XFS_ERROR(EINVAL); } if (ubsize < sizeof(*buf)) { *stat = BULKSTAT_RV_NOTHING; return XFS_ERROR(ENOMEM); } buf = kmem_alloc(sizeof(*buf), KM_SLEEP); if (dip == NULL) { /* We're not being passed a pointer to a dinode. This happens * if BULKSTAT_FG_IGET is selected. Do the iget. */ error = xfs_bulkstat_one_iget(mp, ino, bno, buf, stat); if (error) goto out_free; } else { xfs_bulkstat_one_dinode(mp, ino, dip, buf); } if (copy_to_user(buffer, buf, sizeof(*buf))) { *stat = BULKSTAT_RV_NOTHING; error = EFAULT; goto out_free; } *stat = BULKSTAT_RV_DIDONE; if (ubused) *ubused = sizeof(*buf); out_free: kmem_free(buf, sizeof(*buf)); return error; } /* * Test to see whether we can use the ondisk inode directly, based * on the given bulkstat flags, filling in dipp accordingly. * Returns zero if the inode is dodgey. */ STATIC int xfs_bulkstat_use_dinode( xfs_mount_t *mp, int flags, xfs_buf_t *bp, int clustidx, xfs_dinode_t **dipp) { xfs_dinode_t *dip; unsigned int aformat; *dipp = NULL; if (!bp || (flags & BULKSTAT_FG_IGET)) return 1; dip = (xfs_dinode_t *) xfs_buf_offset(bp, clustidx << mp->m_sb.sb_inodelog); if (INT_GET(dip->di_core.di_magic, ARCH_CONVERT) != XFS_DINODE_MAGIC || !XFS_DINODE_GOOD_VERSION( INT_GET(dip->di_core.di_version, ARCH_CONVERT))) return 0; if (flags & BULKSTAT_FG_QUICK) { *dipp = dip; return 1; } /* BULKSTAT_FG_INLINE: if attr fork is local, or not there, use it */ aformat = INT_GET(dip->di_core.di_aformat, ARCH_CONVERT); if ((XFS_CFORK_Q(&dip->di_core) == 0) || (aformat == XFS_DINODE_FMT_LOCAL) || (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_core.di_anextents)) { *dipp = dip; return 1; } return 1; } /* * Return stat information in bulk (by-inode) for the filesystem. */ int /* error status */ xfs_bulkstat( xfs_mount_t *mp, /* mount point for filesystem */ xfs_ino_t *lastinop, /* last inode returned */ int *ubcountp, /* size of buffer/count returned */ bulkstat_one_pf formatter, /* func that'd fill a single buf */ void *private_data,/* private data for formatter */ size_t statstruct_size, /* sizeof struct filling */ char __user *ubuffer, /* buffer with inode stats */ int flags, /* defined in xfs_itable.h */ int *done) /* 1 if there are more stats to get */ { xfs_agblock_t agbno=0;/* allocation group block number */ xfs_buf_t *agbp; /* agi header buffer */ xfs_agi_t *agi; /* agi header data */ xfs_agino_t agino; /* inode # in allocation group */ xfs_agnumber_t agno; /* allocation group number */ xfs_daddr_t bno; /* inode cluster start daddr */ int chunkidx; /* current index into inode chunk */ int clustidx; /* current index into inode cluster */ xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */ int end_of_ag; /* set if we've seen the ag end */ int error; /* error code */ int fmterror;/* bulkstat formatter result */ __int32_t gcnt; /* current btree rec's count */ xfs_inofree_t gfree; /* current btree rec's free mask */ xfs_agino_t gino; /* current btree rec's start inode */ int i; /* loop index */ int icount; /* count of inodes good in irbuf */ xfs_ino_t ino; /* inode number (filesystem) */ xfs_inobt_rec_t *irbp; /* current irec buffer pointer */ xfs_inobt_rec_t *irbuf; /* start of irec buffer */ xfs_inobt_rec_t *irbufend; /* end of good irec buffer entries */ xfs_ino_t lastino=0; /* last inode number returned */ int nbcluster; /* # of blocks in a cluster */ int nicluster; /* # of inodes in a cluster */ int nimask; /* mask for inode clusters */ int nirbuf; /* size of irbuf */ int rval; /* return value error code */ int tmp; /* result value from btree calls */ int ubcount; /* size of user's buffer */ int ubleft; /* bytes left in user's buffer */ char __user *ubufp; /* pointer into user's buffer */ int ubelem; /* spaces used in user's buffer */ int ubused; /* bytes used by formatter */ xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */ xfs_dinode_t *dip; /* ptr into bp for specific inode */ xfs_inode_t *ip; /* ptr to in-core inode struct */ /* * Get the last inode value, see if there's nothing to do. */ ino = (xfs_ino_t)*lastinop; dip = NULL; agno = XFS_INO_TO_AGNO(mp, ino); agino = XFS_INO_TO_AGINO(mp, ino); if (agno >= mp->m_sb.sb_agcount || ino != XFS_AGINO_TO_INO(mp, agno, agino)) { *done = 1; *ubcountp = 0; return 0; } ubcount = *ubcountp; /* statstruct's */ ubleft = ubcount * statstruct_size; /* bytes */ *ubcountp = ubelem = 0; *done = 0; fmterror = 0; ubufp = ubuffer; nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ? mp->m_sb.sb_inopblock : (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog); nimask = ~(nicluster - 1); nbcluster = nicluster >> mp->m_sb.sb_inopblog; /* * Allocate a page-sized buffer for inode btree records. * We could try allocating something smaller, but for normal * calls we'll always (potentially) need the whole page. */ irbuf = kmem_alloc(NBPC, KM_SLEEP); nirbuf = NBPC / sizeof(*irbuf); /* * Loop over the allocation groups, starting from the last * inode returned; 0 means start of the allocation group. */ rval = 0; while (ubleft >= statstruct_size && agno < mp->m_sb.sb_agcount) { bp = NULL; down_read(&mp->m_peraglock); error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); up_read(&mp->m_peraglock); if (error) { /* * Skip this allocation group and go to the next one. */ agno++; agino = 0; continue; } agi = XFS_BUF_TO_AGI(agbp); /* * Allocate and initialize a btree cursor for ialloc btree. */ cur = xfs_btree_init_cursor(mp, NULL, agbp, agno, XFS_BTNUM_INO, (xfs_inode_t *)0, 0); irbp = irbuf; irbufend = irbuf + nirbuf; end_of_ag = 0; /* * If we're returning in the middle of an allocation group, * we need to get the remainder of the chunk we're in. */ if (agino > 0) { /* * Lookup the inode chunk that this inode lives in. */ error = xfs_inobt_lookup_le(cur, agino, 0, 0, &tmp); if (!error && /* no I/O error */ tmp && /* lookup succeeded */ /* got the record, should always work */ !(error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree, &i)) && i == 1 && /* this is the right chunk */ agino < gino + XFS_INODES_PER_CHUNK && /* lastino was not last in chunk */ (chunkidx = agino - gino + 1) < XFS_INODES_PER_CHUNK && /* there are some left allocated */ XFS_INOBT_MASKN(chunkidx, XFS_INODES_PER_CHUNK - chunkidx) & ~gfree) { /* * Grab the chunk record. Mark all the * uninteresting inodes (because they're * before our start point) free. */ for (i = 0; i < chunkidx; i++) { if (XFS_INOBT_MASK(i) & ~gfree) gcnt++; } gfree |= XFS_INOBT_MASKN(0, chunkidx); irbp->ir_startino = cpu_to_be32(gino); irbp->ir_freecount = cpu_to_be32(gcnt); irbp->ir_free = cpu_to_be64(gfree); irbp++; agino = gino + XFS_INODES_PER_CHUNK; icount = XFS_INODES_PER_CHUNK - gcnt; } else { /* * If any of those tests failed, bump the * inode number (just in case). */ agino++; icount = 0; } /* * In any case, increment to the next record. */ if (!error) error = xfs_inobt_increment(cur, 0, &tmp); } else { /* * Start of ag. Lookup the first inode chunk. */ error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &tmp); icount = 0; } /* * Loop through inode btree records in this ag, * until we run out of inodes or space in the buffer. */ while (irbp < irbufend && icount < ubcount) { /* * Loop as long as we're unable to read the * inode btree. */ while (error) { agino += XFS_INODES_PER_CHUNK; if (XFS_AGINO_TO_AGBNO(mp, agino) >= be32_to_cpu(agi->agi_length)) break; error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp); } /* * If ran off the end of the ag either with an error, * or the normal way, set end and stop collecting. */ if (error || (error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree, &i)) || i == 0) { end_of_ag = 1; break; } /* * If this chunk has any allocated inodes, save it. */ if (gcnt < XFS_INODES_PER_CHUNK) { irbp->ir_startino = cpu_to_be32(gino); irbp->ir_freecount = cpu_to_be32(gcnt); irbp->ir_free = cpu_to_be64(gfree); irbp++; icount += XFS_INODES_PER_CHUNK - gcnt; } /* * Set agino to after this chunk and bump the cursor. */ agino = gino + XFS_INODES_PER_CHUNK; error = xfs_inobt_increment(cur, 0, &tmp); } /* * Drop the btree buffers and the agi buffer. * We can't hold any of the locks these represent * when calling iget. */ xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); xfs_buf_relse(agbp); /* * Now format all the good inodes into the user's buffer. */ irbufend = irbp; for (irbp = irbuf; irbp < irbufend && ubleft >= statstruct_size; irbp++) { /* * Read-ahead the next chunk's worth of inodes. */ if (&irbp[1] < irbufend) { /* * Loop over all clusters in the next chunk. * Do a readahead if there are any allocated * inodes in that cluster. */ for (agbno = XFS_AGINO_TO_AGBNO(mp, be32_to_cpu(irbp[1].ir_startino)), chunkidx = 0; chunkidx < XFS_INODES_PER_CHUNK; chunkidx += nicluster, agbno += nbcluster) { if (XFS_INOBT_MASKN(chunkidx, nicluster) & ~(be64_to_cpu(irbp[1].ir_free))) xfs_btree_reada_bufs(mp, agno, agbno, nbcluster); } } /* * Now process this chunk of inodes. */ for (agino = be32_to_cpu(irbp->ir_startino), chunkidx = 0, clustidx = 0; ubleft > 0 && be32_to_cpu(irbp->ir_freecount) < XFS_INODES_PER_CHUNK; chunkidx++, clustidx++, agino++) { ASSERT(chunkidx < XFS_INODES_PER_CHUNK); /* * Recompute agbno if this is the * first inode of the cluster. * * Careful with clustidx. There can be * multple clusters per chunk, a single * cluster per chunk or a cluster that has * inodes represented from several different * chunks (if blocksize is large). * * Because of this, the starting clustidx is * initialized to zero in this loop but must * later be reset after reading in the cluster * buffer. */ if ((chunkidx & (nicluster - 1)) == 0) { agbno = XFS_AGINO_TO_AGBNO(mp, be32_to_cpu(irbp->ir_startino)) + ((chunkidx & nimask) >> mp->m_sb.sb_inopblog); if (flags & (BULKSTAT_FG_QUICK | BULKSTAT_FG_INLINE)) { ino = XFS_AGINO_TO_INO(mp, agno, agino); bno = XFS_AGB_TO_DADDR(mp, agno, agbno); /* * Get the inode cluster buffer */ ASSERT(xfs_inode_zone != NULL); ip = kmem_zone_zalloc(xfs_inode_zone, KM_SLEEP); ip->i_ino = ino; ip->i_mount = mp; if (bp) xfs_buf_relse(bp); error = xfs_itobp(mp, NULL, ip, &dip, &bp, bno, XFS_IMAP_BULKSTAT); if (!error) clustidx = ip->i_boffset / mp->m_sb.sb_inodesize; kmem_zone_free(xfs_inode_zone, ip); if (XFS_TEST_ERROR(error != 0, mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK, XFS_RANDOM_BULKSTAT_READ_CHUNK)) { bp = NULL; ubleft = 0; rval = error; break; } } } /* * Skip if this inode is free. */ if (XFS_INOBT_MASK(chunkidx) & be64_to_cpu(irbp->ir_free)) continue; /* * Count used inodes as free so we can tell * when the chunk is used up. */ be32_add(&irbp->ir_freecount, 1); ino = XFS_AGINO_TO_INO(mp, agno, agino); bno = XFS_AGB_TO_DADDR(mp, agno, agbno); if (!xfs_bulkstat_use_dinode(mp, flags, bp, clustidx, &dip)) continue; /* * If we need to do an iget, cannot hold bp. * Drop it, until starting the next cluster. */ if ((flags & BULKSTAT_FG_INLINE) && !dip) { if (bp) xfs_buf_relse(bp); bp = NULL; } /* * Get the inode and fill in a single buffer. * BULKSTAT_FG_QUICK uses dip to fill it in. * BULKSTAT_FG_IGET uses igets. * BULKSTAT_FG_INLINE uses dip if we have an * inline attr fork, else igets. * See: xfs_bulkstat_one & xfs_dm_bulkstat_one. * This is also used to count inodes/blks, etc * in xfs_qm_quotacheck. */ ubused = statstruct_size; error = formatter(mp, ino, ubufp, ubleft, private_data, bno, &ubused, dip, &fmterror); if (fmterror == BULKSTAT_RV_NOTHING) { if (error == ENOMEM) ubleft = 0; continue; } if (fmterror == BULKSTAT_RV_GIVEUP) { ubleft = 0; ASSERT(error); rval = error; break; } if (ubufp) ubufp += ubused; ubleft -= ubused; ubelem++; lastino = ino; } } if (bp) xfs_buf_relse(bp); /* * Set up for the next loop iteration. */ if (ubleft > 0) { if (end_of_ag) { agno++; agino = 0; } else agino = XFS_INO_TO_AGINO(mp, lastino); } else break; } /* * Done, we're either out of filesystem or space to put the data. */ kmem_free(irbuf, NBPC); *ubcountp = ubelem; if (agno >= mp->m_sb.sb_agcount) { /* * If we ran out of filesystem, mark lastino as off * the end of the filesystem, so the next call * will return immediately. */ *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0); *done = 1; } else *lastinop = (xfs_ino_t)lastino; return rval; } /* * Return stat information in bulk (by-inode) for the filesystem. * Special case for non-sequential one inode bulkstat. */ int /* error status */ xfs_bulkstat_single( xfs_mount_t *mp, /* mount point for filesystem */ xfs_ino_t *lastinop, /* inode to return */ char __user *buffer, /* buffer with inode stats */ int *done) /* 1 if there are more stats to get */ { int count; /* count value for bulkstat call */ int error; /* return value */ xfs_ino_t ino; /* filesystem inode number */ int res; /* result from bs1 */ /* * note that requesting valid inode numbers which are not allocated * to inodes will most likely cause xfs_itobp to generate warning * messages about bad magic numbers. This is ok. The fact that * the inode isn't actually an inode is handled by the * error check below. Done this way to make the usual case faster * at the expense of the error case. */ ino = (xfs_ino_t)*lastinop; error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t), NULL, 0, NULL, NULL, &res); if (error) { /* * Special case way failed, do it the "long" way * to see if that works. */ (*lastinop)--; count = 1; if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one, NULL, sizeof(xfs_bstat_t), buffer, BULKSTAT_FG_IGET, done)) return error; if (count == 0 || (xfs_ino_t)*lastinop != ino) return error == EFSCORRUPTED ? XFS_ERROR(EINVAL) : error; else return 0; } *done = 0; return 0; } /* * Return inode number table for the filesystem. */ int /* error status */ xfs_inumbers( xfs_mount_t *mp, /* mount point for filesystem */ xfs_ino_t *lastino, /* last inode returned */ int *count, /* size of buffer/count returned */ xfs_inogrp_t __user *ubuffer)/* buffer with inode descriptions */ { xfs_buf_t *agbp; xfs_agino_t agino; xfs_agnumber_t agno; int bcount; xfs_inogrp_t *buffer; int bufidx; xfs_btree_cur_t *cur; int error; __int32_t gcnt; xfs_inofree_t gfree; xfs_agino_t gino; int i; xfs_ino_t ino; int left; int tmp; ino = (xfs_ino_t)*lastino; agno = XFS_INO_TO_AGNO(mp, ino); agino = XFS_INO_TO_AGINO(mp, ino); left = *count; *count = 0; bcount = MIN(left, (int)(NBPP / sizeof(*buffer))); buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP); error = bufidx = 0; cur = NULL; agbp = NULL; while (left > 0 && agno < mp->m_sb.sb_agcount) { if (agbp == NULL) { down_read(&mp->m_peraglock); error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); up_read(&mp->m_peraglock); if (error) { /* * If we can't read the AGI of this ag, * then just skip to the next one. */ ASSERT(cur == NULL); agbp = NULL; agno++; agino = 0; continue; } cur = xfs_btree_init_cursor(mp, NULL, agbp, agno, XFS_BTNUM_INO, (xfs_inode_t *)0, 0); error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp); if (error) { xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); cur = NULL; xfs_buf_relse(agbp); agbp = NULL; /* * Move up the the last inode in the current * chunk. The lookup_ge will always get * us the first inode in the next chunk. */ agino += XFS_INODES_PER_CHUNK - 1; continue; } } if ((error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree, &i)) || i == 0) { xfs_buf_relse(agbp); agbp = NULL; xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); cur = NULL; agno++; agino = 0; continue; } agino = gino + XFS_INODES_PER_CHUNK - 1; buffer[bufidx].xi_startino = XFS_AGINO_TO_INO(mp, agno, gino); buffer[bufidx].xi_alloccount = XFS_INODES_PER_CHUNK - gcnt; buffer[bufidx].xi_allocmask = ~gfree; bufidx++; left--; if (bufidx == bcount) { if (copy_to_user(ubuffer, buffer, bufidx * sizeof(*buffer))) { error = XFS_ERROR(EFAULT); break; } ubuffer += bufidx; *count += bufidx; bufidx = 0; } if (left) { error = xfs_inobt_increment(cur, 0, &tmp); if (error) { xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); cur = NULL; xfs_buf_relse(agbp); agbp = NULL; /* * The agino value has already been bumped. * Just try to skip up to it. */ agino += XFS_INODES_PER_CHUNK; continue; } } } if (!error) { if (bufidx) { if (copy_to_user(ubuffer, buffer, bufidx * sizeof(*buffer))) error = XFS_ERROR(EFAULT); else *count += bufidx; } *lastino = XFS_AGINO_TO_INO(mp, agno, agino); } kmem_free(buffer, bcount * sizeof(*buffer)); if (cur) xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR)); if (agbp) xfs_buf_relse(agbp); return error; }