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linux/fs/xfs/xfs_itable.c

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/*
* 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_internal_inum(
xfs_mount_t *mp,
xfs_ino_t ino)
{
return (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)));
}
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_icdinode_t *dic; /* dinode core info pointer */
xfs_inode_t *ip; /* incore inode pointer */
struct inode *inode;
int error;
error = xfs_iget(mp, NULL, ino,
XFS_IGET_BULKSTAT, XFS_ILOCK_SHARED, &ip, bno);
if (error) {
*stat = BULKSTAT_RV_NOTHING;
return error;
}
ASSERT(ip != NULL);
ASSERT(ip->i_imap.im_blkno != 0);
dic = &ip->i_d;
inode = VFS_I(ip);
/* 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;
/*
* We need to read the timestamps from the Linux inode because
* the VFS keeps writing directly into the inode structure instead
* of telling us about the updates.
*/
buf->bs_atime.tv_sec = inode->i_atime.tv_sec;
buf->bs_atime.tv_nsec = inode->i_atime.tv_nsec;
buf->bs_mtime.tv_sec = inode->i_mtime.tv_sec;
buf->bs_mtime.tv_nsec = inode->i_mtime.tv_nsec;
buf->bs_ctime.tv_sec = inode->i_ctime.tv_sec;
buf->bs_ctime.tv_nsec = inode->i_ctime.tv_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;
}
xfs_iput(ip, XFS_ILOCK_SHARED);
return error;
}
STATIC void
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 *dic, /* dinode inode pointer */
xfs_bstat_t *buf) /* return buffer */
{
/*
* 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 == 1) {
buf->bs_nlink = be16_to_cpu(dic->di_onlink);
buf->bs_projid = 0;
} else {
buf->bs_nlink = be32_to_cpu(dic->di_nlink);
buf->bs_projid = be16_to_cpu(dic->di_projid);
}
buf->bs_ino = ino;
buf->bs_mode = be16_to_cpu(dic->di_mode);
buf->bs_uid = be32_to_cpu(dic->di_uid);
buf->bs_gid = be32_to_cpu(dic->di_gid);
buf->bs_size = be64_to_cpu(dic->di_size);
buf->bs_atime.tv_sec = be32_to_cpu(dic->di_atime.t_sec);
buf->bs_atime.tv_nsec = be32_to_cpu(dic->di_atime.t_nsec);
buf->bs_mtime.tv_sec = be32_to_cpu(dic->di_mtime.t_sec);
buf->bs_mtime.tv_nsec = be32_to_cpu(dic->di_mtime.t_nsec);
buf->bs_ctime.tv_sec = be32_to_cpu(dic->di_ctime.t_sec);
buf->bs_ctime.tv_nsec = be32_to_cpu(dic->di_ctime.t_nsec);
buf->bs_xflags = xfs_dic2xflags(dic);
buf->bs_extsize = be32_to_cpu(dic->di_extsize) << mp->m_sb.sb_blocklog;
buf->bs_extents = be32_to_cpu(dic->di_nextents);
buf->bs_gen = be32_to_cpu(dic->di_gen);
memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
buf->bs_dmevmask = be32_to_cpu(dic->di_dmevmask);
buf->bs_dmstate = be16_to_cpu(dic->di_dmstate);
buf->bs_aextents = be16_to_cpu(dic->di_anextents);
switch (dic->di_format) {
case XFS_DINODE_FMT_DEV:
buf->bs_rdev = xfs_dinode_get_rdev(dic);
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 = be64_to_cpu(dic->di_nblocks);
break;
}
}
/* Return 0 on success or positive error */
STATIC int
xfs_bulkstat_one_fmt(
void __user *ubuffer,
int ubsize,
int *ubused,
const xfs_bstat_t *buffer)
{
if (ubsize < sizeof(*buffer))
return XFS_ERROR(ENOMEM);
if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
return XFS_ERROR(EFAULT);
if (ubused)
*ubused = sizeof(*buffer);
return 0;
}
/*
* Return stat information for one inode.
* Return 0 if ok, else errno.
*/
int /* error status */
xfs_bulkstat_one_int(
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 */
bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
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;
*stat = BULKSTAT_RV_NOTHING;
if (!buffer || xfs_internal_inum(mp, ino))
return XFS_ERROR(EINVAL);
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);
}
error = formatter(buffer, ubsize, ubused, buf);
if (error)
goto out_free;
*stat = BULKSTAT_RV_DIDONE;
out_free:
kmem_free(buf);
return error;
}
int
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_... */
{
return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
xfs_bulkstat_one_fmt, bno,
ubused, dibuff, stat);
}
/*
* 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);
/*
* Check the buffer containing the on-disk inode for di_mode == 0.
* This is to prevent xfs_bulkstat from picking up just reclaimed
* inodes that have their in-core state initialized but not flushed
* to disk yet. This is a temporary hack that would require a proper
* fix in the future.
*/
if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC ||
!XFS_DINODE_GOOD_VERSION(dip->di_version) ||
!dip->di_mode)
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 = dip->di_aformat;
if ((XFS_DFORK_Q(dip) == 0) ||
(aformat == XFS_DINODE_FMT_LOCAL) ||
(aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_anextents)) {
*dipp = dip;
return 1;
}
return 1;
}
#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
/*
* 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 */
int i; /* loop index */
int icount; /* count of inodes good in irbuf */
size_t irbsize; /* size of irec buffer in bytes */
xfs_ino_t ino; /* inode number (filesystem) */
xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
xfs_inobt_rec_incore_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; /* 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 */
/*
* Get the last inode value, see if there's nothing to do.
*/
ino = (xfs_ino_t)*lastinop;
lastino = ino;
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;
}
if (!ubcountp || *ubcountp <= 0) {
return EINVAL;
}
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;
irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
if (!irbuf)
return ENOMEM;
nirbuf = irbsize / sizeof(*irbuf);
/*
* Loop over the allocation groups, starting from the last
* inode returned; 0 means start of the allocation group.
*/
rval = 0;
while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
cond_resched();
bp = NULL;
error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
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_inobt_init_cursor(mp, NULL, agbp, agno);
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) {
xfs_inobt_rec_incore_t r;
/*
* Lookup the inode chunk that this inode lives in.
*/
error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE,
&tmp);
if (!error && /* no I/O error */
tmp && /* lookup succeeded */
/* got the record, should always work */
!(error = xfs_inobt_get_rec(cur, &r, &i)) &&
i == 1 &&
/* this is the right chunk */
agino < r.ir_startino + XFS_INODES_PER_CHUNK &&
/* lastino was not last in chunk */
(chunkidx = agino - r.ir_startino + 1) <
XFS_INODES_PER_CHUNK &&
/* there are some left allocated */
xfs_inobt_maskn(chunkidx,
XFS_INODES_PER_CHUNK - chunkidx) &
~r.ir_free) {
/*
* 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) & ~r.ir_free)
r.ir_freecount++;
}
r.ir_free |= xfs_inobt_maskn(0, chunkidx);
irbp->ir_startino = r.ir_startino;
irbp->ir_freecount = r.ir_freecount;
irbp->ir_free = r.ir_free;
irbp++;
agino = r.ir_startino + XFS_INODES_PER_CHUNK;
icount = XFS_INODES_PER_CHUNK - r.ir_freecount;
} 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_btree_increment(cur, 0, &tmp);
} else {
/*
* Start of ag. Lookup the first inode chunk.
*/
error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &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) {
xfs_inobt_rec_incore_t r;
/*
* 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(cur, agino,
XFS_LOOKUP_GE, &tmp);
cond_resched();
}
/*
* If ran off the end of the ag either with an error,
* or the normal way, set end and stop collecting.
*/
if (error) {
end_of_ag = 1;
break;
}
error = xfs_inobt_get_rec(cur, &r, &i);
if (error || i == 0) {
end_of_ag = 1;
break;
}
/*
* If this chunk has any allocated inodes, save it.
* Also start read-ahead now for this chunk.
*/
if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
/*
* Loop over all clusters in the next chunk.
* Do a readahead if there are any allocated
* inodes in that cluster.
*/
agbno = XFS_AGINO_TO_AGBNO(mp, r.ir_startino);
for (chunkidx = 0;
chunkidx < XFS_INODES_PER_CHUNK;
chunkidx += nicluster,
agbno += nbcluster) {
if (xfs_inobt_maskn(chunkidx, nicluster)
& ~r.ir_free)
xfs_btree_reada_bufs(mp, agno,
agbno, nbcluster);
}
irbp->ir_startino = r.ir_startino;
irbp->ir_freecount = r.ir_freecount;
irbp->ir_free = r.ir_free;
irbp++;
icount += XFS_INODES_PER_CHUNK - r.ir_freecount;
}
/*
* Set agino to after this chunk and bump the cursor.
*/
agino = r.ir_startino + XFS_INODES_PER_CHUNK;
error = xfs_btree_increment(cur, 0, &tmp);
cond_resched();
}
/*
* 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 && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
/*
* Now process this chunk of inodes.
*/
for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
XFS_BULKSTAT_UBLEFT(ubleft) &&
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
* multiple 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 |
BULKSTAT_FG_INLINE)) {
int offset;
ino = XFS_AGINO_TO_INO(mp, agno,
agino);
bno = XFS_AGB_TO_DADDR(mp, agno,
agbno);
/*
* Get the inode cluster buffer
*/
if (bp)
xfs_buf_relse(bp);
error = xfs_inotobp(mp, NULL, ino, &dip,
&bp, &offset,
XFS_IGET_BULKSTAT);
if (!error)
clustidx = offset / mp->m_sb.sb_inodesize;
if (XFS_TEST_ERROR(error != 0,
mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK,
XFS_RANDOM_BULKSTAT_READ_CHUNK)) {
bp = NULL;
ubleft = 0;
rval = error;
break;
}
}
}
ino = XFS_AGINO_TO_INO(mp, agno, agino);
bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
/*
* Skip if this inode is free.
*/
if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
lastino = ino;
continue;
}
/*
* Count used inodes as free so we can tell
* when the chunk is used up.
*/
irbp->ir_freecount++;
if (!xfs_bulkstat_use_dinode(mp, flags, bp,
clustidx, &dip)) {
lastino = ino;
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 && error != ENOENT &&
error != EINVAL) {
ubleft = 0;
rval = error;
break;
}
lastino = ino;
continue;
}
if (fmterror == BULKSTAT_RV_GIVEUP) {
ubleft = 0;
ASSERT(error);
rval = error;
break;
}
if (ubufp)
ubufp += ubused;
ubleft -= ubused;
ubelem++;
lastino = ino;
}
cond_resched();
}
if (bp)
xfs_buf_relse(bp);
/*
* Set up for the next loop iteration.
*/
if (XFS_BULKSTAT_UBLEFT(ubleft)) {
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_large(irbuf);
*ubcountp = ubelem;
/*
* Found some inodes, return them now and return the error next time.
*/
if (ubelem)
rval = 0;
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;
}
int
xfs_inumbers_fmt(
void __user *ubuffer, /* buffer to write to */
const xfs_inogrp_t *buffer, /* buffer to read from */
long count, /* # of elements to read */
long *written) /* # of bytes written */
{
if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
return -EFAULT;
*written = count * sizeof(*buffer);
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 */
void __user *ubuffer,/* buffer with inode descriptions */
inumbers_fmt_pf formatter)
{
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;
xfs_inobt_rec_incore_t r;
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)(PAGE_SIZE / 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) {
error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
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_inobt_init_cursor(mp, NULL, agbp, agno);
error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
&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;
}
}
error = xfs_inobt_get_rec(cur, &r, &i);
if (error || i == 0) {
xfs_buf_relse(agbp);
agbp = NULL;
xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
cur = NULL;
agno++;
agino = 0;
continue;
}
agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
buffer[bufidx].xi_startino =
XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
buffer[bufidx].xi_alloccount =
XFS_INODES_PER_CHUNK - r.ir_freecount;
buffer[bufidx].xi_allocmask = ~r.ir_free;
bufidx++;
left--;
if (bufidx == bcount) {
long written;
if (formatter(ubuffer, buffer, bufidx, &written)) {
error = XFS_ERROR(EFAULT);
break;
}
ubuffer += written;
*count += bufidx;
bufidx = 0;
}
if (left) {
error = xfs_btree_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) {
long written;
if (formatter(ubuffer, buffer, bufidx, &written))
error = XFS_ERROR(EFAULT);
else
*count += bufidx;
}
*lastino = XFS_AGINO_TO_INO(mp, agno, agino);
}
kmem_free(buffer);
if (cur)
xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
XFS_BTREE_NOERROR));
if (agbp)
xfs_buf_relse(agbp);
return error;
}
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