File: [Development] / linux-2.6-xfs / fs / xfs / xfs_itable.c (download)
Revision 1.71, Sun Jan 30 09:59:06 2000 UTC (17 years, 8 months ago) by kenmcd
Branch: MAIN
Changes since 1.70: +12 -17
lines
Encumbrance review done.
Add copyright and license words consistent with GPL.
Refer to http://fsg.melbourne.sgi.com/reviews/ for details.
There is a slight change in the license terms and conditions words
to go with the copyrights, so most of the files are not getting
new GPL's, just updated versions ... but there are 20-30 more files
here as well.
|
/*
* Copyright (C) 1999 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; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will 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., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*/
#ident "$Revision: 1.70 $"
#if defined(__linux__)
#include <xfs_linux.h>
#include <sys/sysmacros.h>
#endif
#include <sys/param.h>
#include "xfs_buf.h"
#include <sys/errno.h>
#include <sys/vnode.h>
#include <sys/systm.h>
#include <sys/sema.h>
#include <sys/immu.h>
#include <sys/kmem.h>
#include <sys/time.h>
#include <sys/debug.h>
#include <ksys/vfile.h>
#include <ksys/fdt.h>
#include <sys/vfs.h>
#if defined(__sgi__)
#include <sys/syssgi.h>
#endif
#include <sys/capability.h>
#include <sys/kthread.h>
#include <sys/uuid.h>
#if defined(__sgi__)
#include <sys/hwgraph.h>
#endif
#include "xfs_macros.h"
#include "xfs_types.h"
#include "xfs_inum.h"
#include "xfs_log.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_dir.h"
#include "xfs_dir2.h"
#include "xfs_mount.h"
#include "xfs_ag.h"
#include "xfs_alloc_btree.h"
#include "xfs_bmap_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_btree.h"
#include "xfs_attr_sf.h"
#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_ialloc.h"
#include "xfs_itable.h"
#include "xfs_error.h"
#ifdef CELL_CAPABLE
#include "xfs_cxfs.h"
#endif
/*
* Return stat information for one inode.
* Return 0 if ok, else errno.
*/
STATIC int /* error status */
xfs_bulkstat_one(
xfs_mount_t *mp, /* mount point for filesystem */
xfs_trans_t *tp, /* transaction pointer */
xfs_ino_t ino, /* inode number to get data for */
void *buffer, /* buffer to place output in */
daddr_t bno, /* starting bno of inode cluster */
void *dibuff, /* on-disk inode buffer */
int *stat) /* BULKSTAT_RV_... */
{
xfs_bstat_t *buf; /* return buffer */
int error; /* error value */
xfs_dinode_t *dip; /* dinode inode pointer */
xfs_dinode_core_t *dic; /* dinode core info pointer */
xfs_inode_t *ip = NULL; /* incore inode pointer */
buf = (xfs_bstat_t *)buffer;
dip = (xfs_dinode_t *)dibuff;
if (! buf || 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_pquotino))) {
*stat = BULKSTAT_RV_NOTHING;
return XFS_ERROR(EINVAL);
}
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_iget(mp, tp, ino, XFS_ILOCK_SHARED, &ip, bno);
if (error) {
*stat = BULKSTAT_RV_NOTHING;
return error;
}
ASSERT(ip != NULL);
ASSERT(ip->i_blkno != (daddr_t)0);
if (ip->i_d.di_mode == 0) {
xfs_iput(ip, XFS_ILOCK_SHARED);
*stat = BULKSTAT_RV_NOTHING;
return XFS_ERROR(ENOENT);
}
dic = &ip->i_d;
ASSERT(dic != NULL);
/* xfs_iget returns the following without needing
* further change.
*/
buf->bs_nlink = dic->di_nlink;
buf->bs_projid = dic->di_projid;
} else {
dic = &dip->di_core;
ASSERT(dic != NULL);
/*
* 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 (dic->di_version == XFS_DINODE_VERSION_1) {
buf->bs_nlink = dic->di_onlink;
buf->bs_projid = 0;
}
else {
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;
buf->bs_atime.tv_sec = dic->di_atime.t_sec;
buf->bs_atime.tv_nsec = dic->di_atime.t_nsec;
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;
/*
* convert di_flags to bs_xflags.
*/
buf->bs_xflags =
((dic->di_flags & XFS_DIFLAG_REALTIME) ?
XFS_XFLAG_REALTIME : 0) |
((dic->di_flags & XFS_DIFLAG_PREALLOC) ?
XFS_XFLAG_PREALLOC : 0) |
(XFS_CFORK_Q(dic) ?
XFS_XFLAG_HASATTR : 0);
buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
buf->bs_extents = dic->di_nextents;
buf->bs_gen = dic->di_gen;
bzero(buf->bs_pad, 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:
if ( ip ) {
buf->bs_rdev = ip->i_df.if_u2.if_rdev;
} else {
buf->bs_rdev = dip->di_u.di_dev;
}
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;
if ( ip ) {
buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
} else {
buf->bs_blocks = dic->di_nblocks;
}
break;
}
if (ip) {
xfs_iput(ip, XFS_ILOCK_SHARED);
}
*stat = BULKSTAT_RV_DIDONE;
return 0;
}
/*
* Return stat information in bulk (by-inode) for the filesystem.
*/
int /* error status */
xfs_bulkstat(
xfs_mount_t *mp, /* mount point for filesystem */
xfs_trans_t *tp, /* transaction pointer */
ino64_t *lastinop, /* last inode returned */
int *ubcountp, /* size of buffer/count returned */
bulkstat_one_pf formatter, /* func that'd fill a single buf */
size_t statstruct_size, /* sizeof struct filling */
caddr_t ubuffer, /* buffer with inode stats */
int flags, /* defined in xfs_itable.h */
int *done) /* 1 if there're more stats to get */
{
xfs_agblock_t agbno; /* 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 */
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; /* 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; /* spaces left in user's buffer */
caddr_t ubufp; /* current pointer into user's buffer */
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 */
vfs_t *vfsp;
int vfs_unbusy_needed = 0;
/*
* Check that the device is valid/mounted and mark it busy
* for the duration of this call.
*/
vfsp = XFS_MTOVFS(mp);
if (!(flags & BULKSTAT_FG_VFSLOCKED)) {
if (error = vfs_busy(vfsp))
return error;
vfs_unbusy_needed = 1;
}
/*
* 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;
if (vfs_unbusy_needed) {
vfs_unbusy(vfsp);
}
return 0;
}
ubcount = ubleft = *ubcountp;
*ubcountp = 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 defined(HAVE_USERACC)
if (ubuffer &&
(error = useracc(ubuffer, ubcount * statstruct_size,
(B_READ|B_PHYS), NULL))) {
if (vfs_unbusy_needed) {
vfs_unbusy(vfsp);
}
return error;
}
#endif
/*
* 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 > 0 && agno < mp->m_sb.sb_agcount) {
bp = NULL;
mrlock(&mp->m_peraglock, MR_ACCESS, PINOD);
error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
mrunlock(&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, tp, 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 = gino;
irbp->ir_freecount = gcnt;
irbp->ir_free = 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) >=
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 = gino;
irbp->ir_freecount = gcnt;
irbp->ir_free = 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_trans_brelse(tp, agbp);
/*
* Now format all the good inodes into the user's buffer.
*/
irbufend = irbp;
for (irbp = irbuf; irbp < irbufend && ubleft > 0; 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,
irbp[1].ir_startino),
chunkidx = 0;
chunkidx < XFS_INODES_PER_CHUNK;
chunkidx += nicluster,
agbno += nbcluster) {
if (XFS_INOBT_MASKN(chunkidx,
nicluster) &
~(irbp[1].ir_free))
xfs_btree_reada_bufs(mp, agno,
agbno, nbcluster);
}
}
/*
* Now process this chunk of inodes.
*/
for (agino = irbp->ir_startino, chunkidx = 0, clustidx = 0;
ubleft > 0 &&
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,
irbp->ir_startino) +
((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_dev = mp->m_dev;
ip->i_mount = mp;
if (bp)
xfs_trans_brelse(tp, bp);
error = xfs_itobp(mp, tp, ip,
&dip, &bp, bno);
kmem_zone_free(xfs_inode_zone, ip);
if (XFS_TEST_ERROR(error != 0,
mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK,
XFS_RANDOM_BULKSTAT_READ_CHUNK)) {
break;
}
clustidx = ((caddr_t)dip -
XFS_BUF_PTR(bp))/
mp->m_sb.sb_inodesize;
}
}
/*
* Skip if this inode is free.
*/
if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free)
continue;
/*
* Count used inodes as free so we can tell
* when the chunk is used up.
*/
irbp->ir_freecount++;
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_PTR(bp) +
(clustidx << mp->m_sb.sb_inodelog));
if (dip->di_core.di_magic
!= XFS_DINODE_MAGIC
|| !XFS_DINODE_GOOD_VERSION(
dip->di_core.di_version))
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 & dm_bulkstat_one.
* This is also used to count inodes/blks, etc
* in xfs_qm_quotacheck.
*/
error = formatter(mp, tp, ino, ubufp, bno, dip,
&fmterror);
if (fmterror == BULKSTAT_RV_NOTHING)
continue;
if (fmterror == BULKSTAT_RV_GIVEUP) {
ubleft = 0;
ASSERT(error);
rval = error;
break;
}
if (ubufp)
ubufp += statstruct_size;
ubleft--;
lastino = ino;
}
}
if (bp)
xfs_trans_brelse(tp, 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)
#if defined(HAVE_USERACC)
unuseracc(ubuffer, ubcount * statstruct_size, (B_READ|B_PHYS));
#endif
*ubcountp = ubcount - ubleft;
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 = (ino64_t)XFS_AGINO_TO_INO(mp, agno, 0);
*done = 1;
} else
*lastinop = (ino64_t)lastino;
if (vfs_unbusy_needed) {
vfs_unbusy(vfsp);
}
return rval;
}
/*
* Return stat information in bulk (by-inode) for the filesystem.
* Special case for non-sequential one inode bulkstat.
*/
STATIC int /* error status */
xfs_bulkstat_single(
xfs_mount_t *mp, /* mount point for filesystem */
ino64_t *lastinop, /* inode to return */
caddr_t buffer, /* buffer with inode stats */
int *done) /* 1 if there're more stats to get */
{
xfs_bstat_t bstat; /* one bulkstat result structure */
int count; /* count value for bulkstat call */
int error; /* return value */
xfs_ino_t ino; /* filesystem inode number */
int res; /* result from bs1 */
ino = (xfs_ino_t)*lastinop;
error = xfs_bulkstat_one(mp, NULL, ino, &bstat, 0, 0, &res);
if (error) {
/*
* Special case way failed, do it the "long" way
* to see if that works.
*/
(*lastinop)--;
count = 1;
if (xfs_bulkstat(mp, NULL, lastinop, &count, xfs_bulkstat_one,
sizeof(bstat), 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;
if (copyout(&bstat, buffer, sizeof(bstat)))
return XFS_ERROR(EFAULT);
return 0;
}
/*
* Return inode number table for the filesystem.
*/
STATIC int /* error status */
xfs_inumbers(
xfs_mount_t *mp, /* mount point for filesystem */
xfs_trans_t *tp, /* transaction pointer */
ino64_t *lastino, /* last inode returned */
int *count, /* size of buffer/count returned */
caddr_t 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, 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) {
mrlock(&mp->m_peraglock, MR_ACCESS, PINOD);
error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
mrunlock(&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, tp, 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_trans_brelse(tp, 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_trans_brelse(tp, 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 (copyout((caddr_t)buffer, ubuffer,
bufidx * sizeof(*buffer))) {
error = XFS_ERROR(EFAULT);
break;
}
ubuffer += bufidx * sizeof(*buffer);
*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_trans_brelse(tp, 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 (copyout((caddr_t)buffer, ubuffer,
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_trans_brelse(tp, agbp);
return error;
}
/*
* Convert file descriptor of a file in the filesystem to
* a mount structure pointer.
*/
int /* error status */
xfs_fd_to_mp(
int fd, /* file descriptor to convert */
int wperm, /* need write perm on device */
xfs_mount_t **mpp, /* return mount pointer */
int rperm) /* set if root per on file fd */
{
dev_t dev;
int error;
vfile_t *fp;
vfs_t *vfsp;
vnode_t *vp;
bhv_desc_t *bdp;
extern int xfs_fstype;
if (error = getf(fd, &fp))
return XFS_ERROR(error);
if (!VF_IS_VNODE(fp))
return XFS_ERROR(EINVAL);
vp = VF_TO_VNODE(fp);
if (vp->v_type == VBLK || vp->v_type == VCHR) {
if (wperm && !(fp->vf_flag & FWRITE))
return XFS_ERROR(EPERM);
if (vp->v_type == VCHR && dev_is_vertex(vp->v_rdev))
dev = chartoblock(vp->v_rdev);
else
dev = vp->v_rdev;
vfsp = vfs_devsearch(dev, xfs_fstype);
if (vfsp == NULL)
vfsp = vp->v_vfsp;
} else {
if (rperm && !_CAP_ABLE(CAP_DEVICE_MGT))
return XFS_ERROR(EPERM);
vfsp = vp->v_vfsp;
}
bdp = bhv_lookup_unlocked(VFS_BHVHEAD(vfsp), &xfs_vfsops);
if (!bdp) {
#if CELL_CAPABLE
if (cell_enabled && (rperm == 0)) {
#pragma mips_frequency_hint NEVER
*mpp = get_cxfs_mountp(vfsp);
if (*mpp)
return 0;
}
#endif
return XFS_ERROR(EINVAL);
}
*mpp = XFS_BHVTOM(bdp);
return 0;
}
#if defined(__sgi__)
/*
* Syssgi interface for bulkstat and inode-table.
*/
int /* error status */
xfs_itable(
int opc, /* op code */
int fd, /* file descriptor of file in fs. */
void *lastip, /* last inode number pointer */
int icount, /* count of entries in buffer */
void *ubuffer, /* buffer with inode descriptions */
void *ocount) /* output count */
{
int count; /* count of records returned */
int error; /* error return value */
ino64_t inlast; /* last inode number */
xfs_mount_t *mp; /* mount point for filesystem */
int done; /* = 1 if there are more stats to get
and if bulkstat should be called
again. This is unused in syssgi
but used in dmi */
if (error = xfs_fd_to_mp(fd, 0, &mp, 1))
return error;
if (XFS_FORCED_SHUTDOWN(mp))
return XFS_ERROR(EIO);
if (copyin((void *)lastip, &inlast, sizeof(inlast)))
return XFS_ERROR(EFAULT);
if ((count = icount) <= 0)
return XFS_ERROR(EINVAL);
switch (opc) {
case SGI_FS_INUMBERS:
error = xfs_inumbers(mp, NULL, &inlast, &count, ubuffer);
break;
case SGI_FS_BULKSTAT:
if (count == 1 && inlast != 0) {
inlast++;
error = xfs_bulkstat_single(mp, &inlast, ubuffer,
&done);
} else {
error = xfs_bulkstat(mp, NULL, &inlast, &count,
(bulkstat_one_pf)xfs_bulkstat_one,
sizeof(xfs_bstat_t), ubuffer,
BULKSTAT_FG_QUICK, &done);
}
break;
case SGI_FS_BULKSTAT_SINGLE:
error = xfs_bulkstat_single(mp, &inlast, ubuffer, &done);
break;
default:
error = XFS_ERROR(EINVAL);
break;
}
if (error)
return error;
if (ocount != NULL) {
if (copyout(&inlast, lastip, sizeof(inlast)) ||
copyout(&count, ocount, sizeof(count)))
return XFS_ERROR(EFAULT);
}
return 0;
}
#endif /* sgi */
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