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/*
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 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.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* 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.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#include <xfs.h>
/*
* File system operations
*/
int
xfs_fs_geometry(
xfs_mount_t *mp,
xfs_fsop_geom_t *geo,
int new_version)
{
geo->blocksize = mp->m_sb.sb_blocksize;
geo->rtextsize = mp->m_sb.sb_rextsize;
geo->agblocks = mp->m_sb.sb_agblocks;
geo->agcount = mp->m_sb.sb_agcount;
geo->logblocks = mp->m_sb.sb_logblocks;
geo->sectsize = mp->m_sb.sb_sectsize;
geo->inodesize = mp->m_sb.sb_inodesize;
geo->imaxpct = mp->m_sb.sb_imax_pct;
geo->datablocks = mp->m_sb.sb_dblocks;
geo->rtblocks = mp->m_sb.sb_rblocks;
geo->rtextents = mp->m_sb.sb_rextents;
geo->logstart = mp->m_sb.sb_logstart;
ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid));
memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid));
if (new_version >= 2) {
geo->sunit = mp->m_sb.sb_unit;
geo->swidth = mp->m_sb.sb_width;
}
if (new_version >= 3) {
geo->version = XFS_FSOP_GEOM_VERSION;
geo->flags =
(XFS_SB_VERSION_HASATTR(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_ATTR : 0) |
(XFS_SB_VERSION_HASNLINK(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_NLINK : 0) |
(XFS_SB_VERSION_HASQUOTA(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_QUOTA : 0) |
(XFS_SB_VERSION_HASALIGN(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_IALIGN : 0) |
(XFS_SB_VERSION_HASDALIGN(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_DALIGN : 0) |
(XFS_SB_VERSION_HASSHARED(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_SHARED : 0) |
(XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) |
(XFS_SB_VERSION_HASDIRV2(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_DIRV2 : 0);
geo->logsectsize = mp->m_sb.sb_sectsize; /* XXX */
geo->rtsectsize = mp->m_sb.sb_sectsize; /* XXX */
geo->dirblocksize = mp->m_dirblksize;
}
return 0;
}
static int
xfs_growfs_data_private(
xfs_mount_t *mp, /* mount point for filesystem */
xfs_growfs_data_t *in) /* growfs data input struct */
{
xfs_agf_t *agf;
xfs_agi_t *agi;
xfs_agnumber_t agno;
xfs_extlen_t agsize;
xfs_extlen_t tmpsize;
xfs_alloc_rec_t *arec;
xfs_btree_sblock_t *block;
xfs_buf_t *bp;
int bsize;
int bucket;
xfs_daddr_t disk_addr;
int dpct;
int error;
xfs_agnumber_t nagcount;
xfs_rfsblock_t nb, nb_mod;
xfs_rfsblock_t new;
xfs_rfsblock_t nfree;
xfs_agnumber_t oagcount;
int pct;
xfs_sb_t *sbp;
int sectbb;
xfs_trans_t *tp;
nb = in->newblocks;
pct = in->imaxpct;
if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
return XFS_ERROR(EINVAL);
dpct = pct - mp->m_sb.sb_imax_pct;
error = xfs_read_buf(mp, mp->m_ddev_targp, XFS_FSB_TO_BB(mp, nb) - 1, 1,
0, &bp);
if (error)
return error;
ASSERT(bp);
xfs_buf_relse(bp);
new = nb; /* use new as a temporary here */
nb_mod = do_div(new, mp->m_sb.sb_agblocks);
nagcount = new + (nb_mod != 0);
if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) {
nagcount--;
nb = nagcount * mp->m_sb.sb_agblocks;
if (nb < mp->m_sb.sb_dblocks)
return XFS_ERROR(EINVAL);
}
new = in->newblocks - mp->m_sb.sb_dblocks;
oagcount = mp->m_sb.sb_agcount;
if (nagcount > oagcount) {
mrlock(&mp->m_peraglock, MR_UPDATE, PINOD);
mp->m_perag = kmem_realloc(mp->m_perag,
sizeof(xfs_perag_t) * nagcount,
sizeof(xfs_perag_t) * oagcount,
KM_SLEEP);
bzero(&mp->m_perag[oagcount],
(nagcount - oagcount) * sizeof(xfs_perag_t));
mp->m_flags |= XFS_MOUNT_32BITINODES;
xfs_initialize_perag(mp, nagcount);
mrunlock(&mp->m_peraglock);
}
tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp),
XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) {
xfs_trans_cancel(tp, 0);
return error;
}
/* new ag's */
sectbb = BTOBB(mp->m_sb.sb_sectsize);
bsize = mp->m_sb.sb_blocksize;
nfree = 0;
for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
/*
* AG freelist header block
*/
disk_addr = XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR);
bp = xfs_buf_get(mp->m_ddev_targp,
disk_addr,
sectbb, 0);
agf = XFS_BUF_TO_AGF(bp);
bzero(agf, mp->m_sb.sb_sectsize);
INT_SET(agf->agf_magicnum, ARCH_CONVERT, XFS_AGF_MAGIC);
INT_SET(agf->agf_versionnum, ARCH_CONVERT, XFS_AGF_VERSION);
INT_SET(agf->agf_seqno, ARCH_CONVERT, agno);
if (agno == nagcount - 1)
agsize =
nb -
(agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
else
agsize = mp->m_sb.sb_agblocks;
INT_SET(agf->agf_length, ARCH_CONVERT, agsize);
INT_SET(agf->agf_roots[XFS_BTNUM_BNOi], ARCH_CONVERT, XFS_BNO_BLOCK(mp));
INT_SET(agf->agf_roots[XFS_BTNUM_CNTi], ARCH_CONVERT, XFS_CNT_BLOCK(mp));
INT_SET(agf->agf_levels[XFS_BTNUM_BNOi], ARCH_CONVERT, 1);
INT_SET(agf->agf_levels[XFS_BTNUM_CNTi], ARCH_CONVERT, 1);
INT_SET(agf->agf_flfirst, ARCH_CONVERT, 0);
INT_SET(agf->agf_fllast, ARCH_CONVERT, XFS_AGFL_SIZE - 1);
INT_SET(agf->agf_flcount, ARCH_CONVERT, 0);
tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
INT_SET(agf->agf_freeblks, ARCH_CONVERT, tmpsize);
INT_SET(agf->agf_longest, ARCH_CONVERT, tmpsize);
error = xfs_bwrite(mp, bp);
if (error) {
goto error0;
}
/*
* AG inode header block
*/
disk_addr = XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR);
bp = xfs_buf_get(mp->m_ddev_targp,
disk_addr,
sectbb, 0);
agi = XFS_BUF_TO_AGI(bp);
bzero(agi, mp->m_sb.sb_sectsize);
INT_SET(agi->agi_magicnum, ARCH_CONVERT, XFS_AGI_MAGIC);
INT_SET(agi->agi_versionnum, ARCH_CONVERT, XFS_AGI_VERSION);
INT_SET(agi->agi_seqno, ARCH_CONVERT, agno);
INT_SET(agi->agi_length, ARCH_CONVERT, agsize);
INT_SET(agi->agi_count, ARCH_CONVERT, 0);
INT_SET(agi->agi_root, ARCH_CONVERT, XFS_IBT_BLOCK(mp));
INT_SET(agi->agi_level, ARCH_CONVERT, 1);
INT_SET(agi->agi_freecount, ARCH_CONVERT, 0);
INT_SET(agi->agi_newino, ARCH_CONVERT, NULLAGINO);
INT_SET(agi->agi_dirino, ARCH_CONVERT, NULLAGINO);
for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
INT_SET(agi->agi_unlinked[bucket], ARCH_CONVERT, NULLAGINO);
error = xfs_bwrite(mp, bp);
if (error) {
goto error0;
}
/*
* BNO btree root block
*/
disk_addr = XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp));
bp = xfs_buf_get(mp->m_ddev_targp,
disk_addr,
BTOBB(bsize), 0);
block = XFS_BUF_TO_SBLOCK(bp);
bzero(block, bsize);
INT_SET(block->bb_magic, ARCH_CONVERT, XFS_ABTB_MAGIC);
INT_SET(block->bb_level, ARCH_CONVERT, 0);
INT_SET(block->bb_numrecs, ARCH_CONVERT, 1);
INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK);
INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK);
arec = XFS_BTREE_REC_ADDR(bsize, xfs_alloc, block, 1,
mp->m_alloc_mxr[0]);
INT_SET(arec->ar_startblock, ARCH_CONVERT, XFS_PREALLOC_BLOCKS(mp));
INT_SET(arec->ar_blockcount, ARCH_CONVERT, agsize - INT_GET(arec->ar_startblock, ARCH_CONVERT));
error = xfs_bwrite(mp, bp);
if (error) {
goto error0;
}
/*
* CNT btree root block
*/
disk_addr = XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp));
bp = xfs_buf_get(mp->m_ddev_targp,
disk_addr,
BTOBB(bsize), 0);
block = XFS_BUF_TO_SBLOCK(bp);
bzero(block, bsize);
INT_SET(block->bb_magic, ARCH_CONVERT, XFS_ABTC_MAGIC);
INT_SET(block->bb_level, ARCH_CONVERT, 0);
INT_SET(block->bb_numrecs, ARCH_CONVERT, 1);
INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK);
INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK);
arec = XFS_BTREE_REC_ADDR(bsize, xfs_alloc, block, 1,
mp->m_alloc_mxr[0]);
INT_SET(arec->ar_startblock, ARCH_CONVERT, XFS_PREALLOC_BLOCKS(mp));
INT_SET(arec->ar_blockcount, ARCH_CONVERT, agsize - INT_GET(arec->ar_startblock, ARCH_CONVERT));
nfree += INT_GET(arec->ar_blockcount, ARCH_CONVERT);
error = xfs_bwrite(mp, bp);
if (error) {
goto error0;
}
/*
* INO btree root block
*/
disk_addr = XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp));
bp = xfs_buf_get(mp->m_ddev_targp,
disk_addr,
BTOBB(bsize), 0);
block = XFS_BUF_TO_SBLOCK(bp);
bzero(block, bsize);
INT_SET(block->bb_magic, ARCH_CONVERT, XFS_IBT_MAGIC);
INT_SET(block->bb_level, ARCH_CONVERT, 0);
INT_SET(block->bb_numrecs, ARCH_CONVERT, 0);
INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK);
INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK);
error = xfs_bwrite(mp, bp);
if (error) {
goto error0;
}
}
xfs_trans_agblocks_delta(tp, nfree);
/*
* There are new blocks in the old last a.g.
*/
if (new) {
/*
* Change the agi length.
*/
error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
if (error) {
goto error0;
}
ASSERT(bp);
agi = XFS_BUF_TO_AGI(bp);
INT_MOD(agi->agi_length, ARCH_CONVERT, new);
ASSERT(nagcount == oagcount
|| INT_GET(agi->agi_length, ARCH_CONVERT) == mp->m_sb.sb_agblocks);
xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
/*
* Change agf length.
*/
error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp);
if (error) {
goto error0;
}
ASSERT(bp);
agf = XFS_BUF_TO_AGF(bp);
INT_MOD(agf->agf_length, ARCH_CONVERT, new);
ASSERT(INT_GET(agf->agf_length, ARCH_CONVERT) ==
INT_GET(agi->agi_length, ARCH_CONVERT));
/*
* Free the new space.
*/
error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
INT_GET(agf->agf_length, ARCH_CONVERT) - new), new);
if (error) {
goto error0;
}
}
if (nagcount > oagcount)
xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
if (nb > mp->m_sb.sb_dblocks)
xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
nb - mp->m_sb.sb_dblocks);
if (nfree)
xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
if (dpct)
xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
error = xfs_trans_commit(tp, 0, NULL);
if (error) {
return error;
}
if (mp->m_sb.sb_imax_pct) {
__uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
do_div(icount, 100);
mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
} else
mp->m_maxicount = 0;
for (agno = 1; agno < nagcount; agno++) {
error = xfs_read_buf(mp, mp->m_ddev_targp,
XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
sectbb, 0, &bp);
if (error) {
xfs_fs_cmn_err(CE_WARN, mp,
"error %d reading secondary superblock for ag %d\n",
error, agno);
break;
}
sbp = XFS_BUF_TO_SBP(bp);
xfs_xlatesb(sbp, &mp->m_sb, -1, ARCH_CONVERT, XFS_SB_ALL_BITS);
/*
* If we get an error writing out the alternate superblocks,
* just issue a warning and continue. The real work is
* already done and committed.
*/
if (!(error = xfs_bwrite(mp, bp))) {
continue;
} else {
xfs_fs_cmn_err(CE_WARN, mp,
"write error %d updating secondary superblock for ag %d\n",
error, agno);
break; /* no point in continuing */
}
}
return 0;
error0:
xfs_trans_cancel(tp, XFS_TRANS_ABORT);
return error;
}
static int
xfs_growfs_log_private(
xfs_mount_t *mp, /* mount point for filesystem */
xfs_growfs_log_t *in) /* growfs log input struct */
{
xfs_extlen_t nb;
nb = in->newblocks;
if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
return XFS_ERROR(EINVAL);
if (nb == mp->m_sb.sb_logblocks &&
in->isint == (mp->m_sb.sb_logstart != 0))
return XFS_ERROR(EINVAL);
/*
* Moving the log is hard, need new interfaces to sync
* the log first, hold off all activity while moving it.
* Can have shorter or longer log in the same space,
* or transform internal to external log or vice versa.
*/
return XFS_ERROR(ENOSYS);
}
/*
* protected versions of growfs function acquire and release locks on the mount
* point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
* XFS_IOC_FSGROWFSRT
*/
int
xfs_growfs_data(
xfs_mount_t *mp,
xfs_growfs_data_t *in)
{
int error;
if (!cpsema(&mp->m_growlock))
return XFS_ERROR(EWOULDBLOCK);
error = xfs_growfs_data_private(mp, in);
vsema(&mp->m_growlock);
return error;
}
int
xfs_growfs_log(
xfs_mount_t *mp,
xfs_growfs_log_t *in)
{
int error;
if (!cpsema(&mp->m_growlock))
return XFS_ERROR(EWOULDBLOCK);
error = xfs_growfs_log_private(mp, in);
vsema(&mp->m_growlock);
return error;
}
/*
* exported through ioctl XFS_IOC_FSCOUNTS
*/
int
xfs_fs_counts(
xfs_mount_t *mp,
xfs_fsop_counts_t *cnt)
{
int s;
s = XFS_SB_LOCK(mp);
cnt->freedata = mp->m_sb.sb_fdblocks;
cnt->freertx = mp->m_sb.sb_frextents;
cnt->freeino = mp->m_sb.sb_ifree;
cnt->allocino = mp->m_sb.sb_icount;
XFS_SB_UNLOCK(mp, s);
return 0;
}
/*
* exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
*
* xfs_reserve_blocks is called to set m_resblks
* in the in-core mount table. The number of unused reserved blocks
* is kept in m_resbls_avail.
*
* Reserve the requested number of blocks if available. Otherwise return
* as many as possible to satisfy the request. The actual number
* reserved are returned in outval
*
* A null inval pointer indicates that only the current reserved blocks
* available should be returned no settings are changed.
*/
int
xfs_reserve_blocks(
xfs_mount_t *mp,
__uint64_t *inval,
xfs_fsop_resblks_t *outval)
{
__uint64_t lcounter, delta;
__uint64_t request;
int s;
/* If inval is null, report current values and return */
if (inval == (__uint64_t *)NULL) {
outval->resblks = mp->m_resblks;
outval->resblks_avail = mp->m_resblks_avail;
return(0);
}
request = *inval;
s = XFS_SB_LOCK(mp);
/*
* If our previous reservation was larger than the current value,
* then move any unused blocks back to the free pool.
*/
if (mp->m_resblks > request) {
lcounter = mp->m_resblks_avail - request;
if (lcounter > 0) { /* release unused blocks */
mp->m_sb.sb_fdblocks += lcounter;
mp->m_resblks_avail -= lcounter;
}
mp->m_resblks = request;
} else {
delta = request - mp->m_resblks;
lcounter = mp->m_sb.sb_fdblocks;
lcounter -= delta;
if (lcounter < 0) {
/* We can't satisfy the request, just get what we can */
mp->m_resblks += mp->m_sb.sb_fdblocks;
mp->m_resblks_avail += mp->m_sb.sb_fdblocks;
mp->m_sb.sb_fdblocks = 0;
} else {
mp->m_sb.sb_fdblocks = lcounter;
mp->m_resblks = request;
mp->m_resblks_avail += delta;
}
}
outval->resblks = mp->m_resblks;
outval->resblks_avail = mp->m_resblks_avail;
XFS_SB_UNLOCK(mp, s);
return(0);
}
void
xfs_fs_log_dummy(xfs_mount_t *mp)
{
xfs_trans_t *tp;
xfs_inode_t *ip;
tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
atomic_inc(&mp->m_active_trans);
if (xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0)) {
xfs_trans_cancel(tp, 0);
return;
}
ip = mp->m_rootip;
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
xfs_trans_ihold(tp, ip);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
xfs_trans_commit(tp, XFS_TRANS_SYNC, NULL);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
}
int
xfs_fs_freeze(
xfs_mount_t *mp)
{
vfs_t *vfsp;
/*REFERENCED*/
int error;
vfsp = XFS_MTOVFS(mp);
/* Stop new writers */
xfs_start_freeze(mp, XFS_FREEZE_WRITE);
/* Flush the refcache */
xfs_refcache_purge_mp(mp);
/* Flush delalloc and delwri data */
VFS_SYNC(vfsp, SYNC_DELWRI|SYNC_WAIT, sys_cred, error);
/* Pause transaction subsystem */
xfs_start_freeze(mp, XFS_FREEZE_TRANS);
/* Flush any remaining inodes into buffers */
VFS_SYNC(vfsp, SYNC_ATTR|SYNC_WAIT, sys_cred, error);
/* Push all buffers out to disk */
xfs_binval(mp->m_ddev_targ);
if (mp->m_rtdev != NODEV) {
xfs_binval(mp->m_rtdev_targ);
}
/* Push the superblock and write an unmount record */
xfs_log_unmount_write(mp);
xfs_unmountfs_writesb(mp);
return 0;
}
int
xfs_fs_thaw(
xfs_mount_t *mp)
{
xfs_unmountfs_writesb(mp);
xfs_finish_freeze(mp);
return 0;
}
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