diff options
Diffstat (limited to 'sys/gnu/fs/xfs/xfs_itable.c')
| -rw-r--r-- | sys/gnu/fs/xfs/xfs_itable.c | 848 |
1 files changed, 0 insertions, 848 deletions
diff --git a/sys/gnu/fs/xfs/xfs_itable.c b/sys/gnu/fs/xfs/xfs_itable.c deleted file mode 100644 index b8f9f6f..0000000 --- a/sys/gnu/fs/xfs/xfs_itable.c +++ /dev/null @@ -1,848 +0,0 @@ -/* - * 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_dir.h" -#include "xfs_dir2.h" -#include "xfs_dmapi.h" -#include "xfs_mount.h" -#include "xfs_bmap_btree.h" -#include "xfs_alloc_btree.h" -#include "xfs_ialloc_btree.h" -#include "xfs_dir_sf.h" -#include "xfs_dir2_sf.h" -#include "xfs_attr_sf.h" -#include "xfs_dinode.h" -#include "xfs_inode.h" -#include "xfs_ialloc.h" -#include "xfs_itable.h" -#include "xfs_error.h" -#include "xfs_btree.h" - -#ifndef HAVE_USERACC -#define useracc(ubuffer, size, flags, foo) (0) -#define unuseracc(ubuffer, size, flags) -#endif - -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 */ - xfs_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; -} - -/* - * 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; - /* - * Lock down the user's buffer. If a buffer was not sent, as in the case - * disk quota code calls here, we skip this. - */ - if (ubuffer && - (error = useracc(ubuffer, ubcount * statstruct_size, - (B_READ|B_PHYS), NULL))) { - return error; - } - /* - * 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); - INT_SET(irbp->ir_startino, ARCH_CONVERT, gino); - INT_SET(irbp->ir_freecount, ARCH_CONVERT, gcnt); - INT_SET(irbp->ir_free, ARCH_CONVERT, 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) { - INT_SET(irbp->ir_startino, ARCH_CONVERT, gino); - INT_SET(irbp->ir_freecount, ARCH_CONVERT, gcnt); - INT_SET(irbp->ir_free, ARCH_CONVERT, 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, - INT_GET(irbp[1].ir_startino, ARCH_CONVERT)), - chunkidx = 0; - chunkidx < XFS_INODES_PER_CHUNK; - chunkidx += nicluster, - agbno += nbcluster) { - if (XFS_INOBT_MASKN(chunkidx, - nicluster) & - ~(INT_GET(irbp[1].ir_free, ARCH_CONVERT))) - xfs_btree_reada_bufs(mp, agno, - agbno, nbcluster); - } - } - /* - * Now process this chunk of inodes. - */ - for (agino = INT_GET(irbp->ir_startino, ARCH_CONVERT), chunkidx = 0, clustidx = 0; - ubleft > 0 && - INT_GET(irbp->ir_freecount, ARCH_CONVERT) < 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, - INT_GET(irbp->ir_startino, ARCH_CONVERT)) + - ((chunkidx & nimask) >> - mp->m_sb.sb_inopblog); - - if (flags & BULKSTAT_FG_QUICK) { - 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) & INT_GET(irbp->ir_free, ARCH_CONVERT)) - continue; - /* - * Count used inodes as free so we can tell - * when the chunk is used up. - */ - INT_MOD(irbp->ir_freecount, ARCH_CONVERT, +1); - ino = XFS_AGINO_TO_INO(mp, agno, agino); - bno = XFS_AGB_TO_DADDR(mp, agno, agbno); - if (flags & BULKSTAT_FG_QUICK) { - 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))) - continue; - } - - /* - * Get the inode and fill in a single buffer. - * BULKSTAT_FG_QUICK uses dip to fill it in. - * BULKSTAT_FG_IGET uses 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); - if (ubuffer) - unuseracc(ubuffer, ubcount * statstruct_size, (B_READ|B_PHYS)); - *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 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; -} |
