File: [Development] / xfs-linux-nodel / Attic / xfs_dquot.c (download)
Revision 1.13.1.4, Fri Aug 2 20:39:48 1996 UTC (21 years, 2 months ago) by sup
CVS Tags: DELETE-1
Changes since 1.13.1.3: +30 -13
lines
406540 quotaoff can lead to a crash
Don't purge the dquot if nrefs != 0.
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#ident "$Revision: 1.13.1.4 $"
#include <sys/param.h>
#include <sys/sysinfo.h>
#include <sys/buf.h>
#include <sys/ksa.h>
#include <sys/vnode.h>
#include <sys/uuid.h>
#include <sys/atomic_ops.h>
#include <sys/kmem.h>
#include <sys/debug.h>
#include <sys/proc.h>
#include <sys/cmn_err.h>
#include <sys/atomic_ops.h>
#include <sys/idbg.h>
#include <sys/idbgentry.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <sys/ktrace.h>
#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_ag.h"
#include "xfs_mount.h"
#include "xfs_alloc_btree.h"
#include "xfs_bmap_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_alloc.h"
#include "xfs_bmap.h"
#include "xfs_btree.h"
#include "xfs_bmap.h"
#include "xfs_attr_sf.h"
#include "xfs_dir_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode_item.h"
#include "xfs_inode.h"
#include "xfs_error.h"
#include "xfs_trans_priv.h"
#include "xfs_buf_item.h"
#include "xfs_itable.h"
#include "xfs_bit.h"
#include "xfs_quota.h"
#include "xfs_dqblk.h"
#include "xfs_dquot.h"
#include "xfs_qm.h"
#include "xfs_quota_priv.h"
/*
LOCK ORDER
inode lock (ilock)
dquot hash-chain lock (hashlock)
xqm dquot freelist lock (freelistlock
mount's dquot list lock (mplistlock)
user dquot lock - lock ordering among dquots is based on the uid or prid
proj dquot lock - similar to udquots. Between the two dquots, the udquot
has to be locked first.
pin lock - the dquot lock must be held to take this lock.
flush lock - ditto.
*/
STATIC int xfs_qm_dqlookup(xfs_mount_t *, xfs_dqid_t,
xfs_dqhash_t *, xfs_dquot_t **);
STATIC int xfs_qm_idtodq(xfs_mount_t *, xfs_dqid_t,
uint, uint, xfs_dquot_t **);
STATIC void xfs_qm_dqflush_done(buf_t *, xfs_dq_logitem_t *);
STATIC int xfs_qm_dqtobp(xfs_trans_t *, xfs_dquot_t *,
xfs_disk_dquot_t **, buf_t **, uint);
STATIC void xfs_qm_init_dquot_blk(xfs_trans_t *, xfs_mount_t *,
xfs_dqid_t, uint, buf_t *);
STATIC void xfs_qm_dqinit_core(xfs_dqid_t, uint, xfs_dqblk_t *);
STATIC int xfs_qm_dqalloc(xfs_trans_t*, xfs_mount_t *,
xfs_dquot_t*, xfs_inode_t *,
xfs_fileoff_t, buf_t **);
STATIC int xfs_qm_dqread(xfs_trans_t*, xfs_dqid_t, xfs_dquot_t *,
uint);
#ifdef DEBUG
int xfs_do_dqerror = 0;
int xfs_dqreq_num = 0;
int xfs_dqerror_mod = 33;
dev_t xfs_dqerror_dev = 0;
#endif
/*
* Allocate and initialize a dquot. We don't always allocate fresh memory;
* we try to reclaim a free dquot if the number of incore dquots are above
* a threshold.
* The only field inside the core that gets initialized at this point
* is the d_id field. The idea is to fill in the entire q_core
* when we read in the on disk dquot.
*/
xfs_dquot_t *
xfs_qm_dqinit(
xfs_mount_t *mp,
xfs_dqid_t id,
uint type)
{
xfs_dquot_t *dqp;
boolean_t brandnewdquot;
brandnewdquot = xfs_qm_dqalloc_incore(&dqp);
dqp->dq_flags = type;
dqp->q_core.d_id = id;
dqp->q_mount = mp;
dqp->q_dev = mp->m_dev;
/*
* No need to re-initialize these if this is a reclaimed dquot.
*/
if (brandnewdquot) {
dqp->dq_flnext = dqp->dq_flprev = dqp;
mutex_init(&dqp->q_qlock, MUTEX_DEFAULT, "xdq");
initnsema(&dqp->q_flock, 1, "fdq");
sv_init(&dqp->q_pinwait, SV_DEFAULT, "pdq");
#ifdef DQUOT_TRACING
dqp->q_trace = ktrace_alloc(DQUOT_TRACE_SIZE, 0);
xfs_dqtrace_entry(dqp, "DQINIT");
#endif
} else {
/*
* Only the q_core portion was bzeroed in dqreclaim_one().
* So, we need to reset others.
*/
dqp->q_nrefs = 0;
dqp->q_blkno = 0;
dqp->MPL_NEXT = dqp->HL_NEXT = NULL;
dqp->HL_PREVP = dqp->MPL_PREVP = NULL;
dqp->q_bufoffset = 0;
dqp->q_fileoffset = 0;
dqp->q_transp = NULL;
dqp->q_pdquot = NULL;
dqp->q_res_bcount = 0;
dqp->q_res_icount = 0;
dqp->q_res_rtbcount = 0;
dqp->q_pincount = 0;
dqp->q_hash = 0;
ASSERT(dqp->dq_flnext == dqp->dq_flprev);
#ifdef DQUOT_TRACING
ASSERT(dqp->q_trace);
xfs_dqtrace_entry(dqp, "DQRECLAIMED_INIT");
#endif
}
/*
* log item gets initialized later
*/
return (dqp);
}
/*
* This is called to free all the memory associated with a dquot
*/
void
xfs_qm_dqdestroy(
xfs_dquot_t *dqp)
{
ASSERT(! XFS_DQ_IS_ON_FREELIST(dqp));
mutex_destroy(&dqp->q_qlock);
freesema(&dqp->q_flock);
sv_destroy(&dqp->q_pinwait);
#ifdef DQUOT_TRACING
if (dqp->q_trace)
ktrace_free(dqp->q_trace);
dqp->q_trace = NULL;
#endif
kmem_zone_free(G_xqm->qm_dqzone, dqp);
atomicAddUint(&G_xqm->qm_totaldquots, -1);
}
/*
* This is what a 'fresh' dquot inside a dquot chunk looks like on disk.
*/
STATIC void
xfs_qm_dqinit_core(
xfs_dqid_t id,
uint type,
xfs_dqblk_t *d)
{
/*
* Caller has bzero'd the entire dquot 'chunk' already.
*/
d->dd_diskdq.d_magic = XFS_DQUOT_MAGIC;
d->dd_diskdq.d_version = XFS_DQUOT_VERSION;
d->dd_diskdq.d_id = id;
d->dd_diskdq.d_flags = type;
}
#ifdef DQUOT_TRACING
/*
* Dquot tracing for debugging.
*/
/* ARGSUSED */
void
xfs_dqtrace_entry__(
xfs_dquot_t *dqp,
char *func,
void *retaddr,
xfs_inode_t *ip)
{
xfs_dquot_t *udqp = NULL;
int ino;
ASSERT(dqp->q_trace);
if (ip) {
ino = ip->i_ino;
udqp = ip->i_udquot;
}
ktrace_enter(dqp->q_trace,
(void *)(__psint_t)DQUOT_KTRACE_ENTRY,
(void *)func,
(void *)(__psint_t)dqp->q_nrefs,
(void *)(__psint_t)dqp->dq_flags,
(void *)(__psint_t)dqp->q_res_bcount,
(void *)(__psint_t)dqp->q_core.d_bcount,
(void *)(__psint_t)dqp->q_core.d_icount,
(void *)(__psint_t)dqp->q_core.d_blk_hardlimit,
(void *)(__psint_t)dqp->q_core.d_blk_softlimit,
(void *)(__psint_t)dqp->q_core.d_ino_hardlimit,
(void *)(__psint_t)dqp->q_core.d_ino_softlimit,
(void *)(__psint_t)dqp->q_core.d_id, /* 11 */
(void *)(__psint_t)curprocp->p_pid,
(void *)(__psint_t)ino,
(void *)(__psint_t)retaddr,
(void *)(__psint_t)udqp);
return;
}
#endif
/*
* Check the limits and timers of a dquot and start or reset timers
* if necessary.
* This gets called even when quota enforcement is OFF, which makes our
* life a little less complicated. (We just don't reject any quota
* reservations in that case, when enforcement is off).
* We also return 0 as the values of the timers in Q_GETQUOTA calls, when
* enforcement's off.
* In contrast, warnings are a little different in that they don't
* 'automatically' get started when limits get exceeded.
*/
void
xfs_qm_adjust_dqtimers(
xfs_mount_t *mp,
xfs_disk_dquot_t *d)
{
/*
* The dquot had better be locked. We are modifying it here.
*/
/*
* root's limits are not real limits.
*/
if (d->d_id == 0)
return;
#ifdef QUOTADEBUG
if (d->d_blk_hardlimit)
ASSERT(d->d_blk_softlimit <= d->d_blk_hardlimit);
if (d->d_ino_hardlimit)
ASSERT(d->d_ino_softlimit <= d->d_ino_hardlimit);
#endif
if (d->d_btimer == 0) {
if ((d->d_blk_softlimit &&
(d->d_bcount >= d->d_blk_softlimit)) ||
(d->d_blk_hardlimit &&
(d->d_bcount >= d->d_blk_hardlimit))) {
d->d_btimer = time + mp->QI_BTIMELIMIT;
}
} else {
if ((d->d_blk_softlimit == 0 ||
(d->d_bcount < d->d_blk_softlimit)) &&
(d->d_blk_hardlimit == 0 ||
(d->d_bcount < d->d_blk_hardlimit))) {
d->d_btimer = 0;
}
}
if (d->d_itimer == 0) {
if ((d->d_ino_softlimit &&
(d->d_icount >= d->d_ino_softlimit)) ||
(d->d_ino_hardlimit &&
(d->d_icount >= d->d_ino_hardlimit))) {
d->d_itimer = time + mp->QI_ITIMELIMIT;
}
} else {
if ((d->d_ino_softlimit == 0 ||
(d->d_icount < d->d_ino_softlimit)) &&
(d->d_ino_hardlimit == 0 ||
(d->d_icount < d->d_ino_hardlimit))) {
d->d_itimer = 0;
}
}
}
/*
* Increment or reset warnings of a given dquot.
*/
int
xfs_qm_dqwarn(
xfs_disk_dquot_t *d,
uint flags)
{
int warned;
/*
* root's limits are not real limits.
*/
if (d->d_id == 0)
return (0);
warned = 0;
if (d->d_blk_softlimit &&
(d->d_bcount >= d->d_blk_softlimit)) {
if (flags & XFS_QMOPT_DOWARN) {
d->d_bwarns++;
warned++;
}
} else {
if (d->d_blk_softlimit == 0 ||
(d->d_bcount < d->d_blk_softlimit)) {
d->d_bwarns = 0;
}
}
if (d->d_ino_softlimit > 0 &&
(d->d_icount >= d->d_ino_softlimit)) {
if (flags & XFS_QMOPT_DOWARN) {
d->d_iwarns++;
warned++;
}
} else {
if ((d->d_ino_softlimit == 0) ||
(d->d_icount < d->d_ino_softlimit)) {
d->d_iwarns = 0;
}
}
#ifdef QUOTADEBUG
if (d->d_iwarns)
printf("--------@@Inode warnings running : %llu >= %llu\n",
d->d_icount, d->d_ino_softlimit);
if (d->d_bwarns)
printf("--------@@Blks warnings running : %llu >= %llu\n",
d->d_bcount, d->d_blk_softlimit);
#endif
return (warned);
}
/*
* initialize a buffer full of dquots and log the whole thing
*/
STATIC void
xfs_qm_init_dquot_blk(
xfs_trans_t *tp,
xfs_mount_t *mp,
xfs_dqid_t id,
uint type,
buf_t *bp)
{
xfs_dqblk_t *d;
int curid, i;
ASSERT(tp);
ASSERT(bp->b_flags & B_BUSY);
ASSERT(valusema(&bp->b_lock) <= 0);
d = (xfs_dqblk_t *)bp->b_un.b_addr;
/*
* ID of the first dquot in the block - id's are zero based.
*/
curid = id - (id % XFS_QM_DQPERBLK(mp));
ASSERT(curid >= 0);
bzero(d, BBTOB(mp->QI_DQCHUNKLEN));
for (i = 0; i < XFS_QM_DQPERBLK(mp); i++, d++, curid++)
xfs_qm_dqinit_core(curid, type, d);
xfs_trans_dquot_buf(tp, bp,
type & XFS_DQ_USER ?
XFS_BLI_UDQUOT_BUF :
XFS_BLI_PDQUOT_BUF);
xfs_trans_log_buf(tp, bp, 0, BBTOB(mp->QI_DQCHUNKLEN) - 1);
}
/*
* Allocate a block and fill it with dquots.
* This is called when the bmapi finds a hole.
*/
STATIC int
xfs_qm_dqalloc(
xfs_trans_t *tp,
xfs_mount_t *mp,
xfs_dquot_t *dqp,
xfs_inode_t *quotip,
xfs_fileoff_t offset_fsb,
buf_t **O_bpp)
{
xfs_fsblock_t firstblock;
xfs_bmap_free_t flist;
xfs_bmbt_irec_t map;
int nmaps, error, committed;
buf_t *bp;
ASSERT(tp != NULL);
xfs_dqtrace_entry(dqp, "DQALLOC");
/*
* Initialize the bmap freelist prior to calling bmapi code.
*/
XFS_BMAP_INIT(&flist, &firstblock);
xfs_ilock(quotip, XFS_ILOCK_EXCL);
/*
* Return if this type of quotas is turned off while we didn't
* have an inode lock
*/
if (XFS_IS_THIS_QUOTA_OFF(dqp)) {
xfs_iunlock(quotip, XFS_ILOCK_EXCL);
return (ESRCH);
}
/*
* xfs_trans_commit normally decrements the vnode ref count
* when it unlocks the inode. Since we want to keep the quota
* inode around, we bump the vnode ref count now.
*/
VN_HOLD(XFS_ITOV(quotip));
xfs_trans_ijoin(tp, quotip, XFS_ILOCK_EXCL);
nmaps = 1;
if (error = xfs_bmapi(tp, quotip,
offset_fsb, XFS_DQUOT_CLUSTER_SIZE_FSB,
XFS_BMAPI_METADATA | XFS_BMAPI_WRITE,
&firstblock,
1, /* only one block */
&map, &nmaps, &flist)) {
goto error0;
}
ASSERT(map.br_blockcount == XFS_DQUOT_CLUSTER_SIZE_FSB);
ASSERT(nmaps == 1);
ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
(map.br_startblock != HOLESTARTBLOCK));
/*
* Keep track of the blkno to save a lookup later
*/
dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock);
/* now we can just get the buffer (there's nothing to read yet) */
bp = xfs_trans_get_buf(tp, mp->m_dev,
dqp->q_blkno,
mp->QI_DQCHUNKLEN,
0);
if (!bp || (error = geterror(bp)))
goto error1;
/*
* Make a chunk of dquots out of this buffer and log
* the entire thing.
*/
xfs_qm_init_dquot_blk(tp, mp, dqp->q_core.d_id,
dqp->dq_flags & (XFS_DQ_USER|XFS_DQ_PROJ),
bp);
if (error = xfs_bmap_finish(&tp, &flist, firstblock, &committed)) {
goto error1;
}
*O_bpp = bp;
return 0;
error1:
xfs_bmap_cancel(&flist);
error0:
xfs_iunlock(quotip, XFS_ILOCK_EXCL);
return (error);
}
/*
* Maps a dquot to the buffer containing its on-disk version.
* This returns a ptr to the buffer containing the on-disk dquot
* in the bpp param, and a ptr to the on-disk dquot within that buffer
*/
STATIC int
xfs_qm_dqtobp(
xfs_trans_t *tp,
xfs_dquot_t *dqp,
xfs_disk_dquot_t **O_ddpp,
buf_t **O_bpp,
uint flags)
{
xfs_fsblock_t firstblock;
xfs_bmbt_irec_t map;
int nmaps, error;
buf_t *bp;
xfs_inode_t *quotip;
xfs_mount_t *mp;
xfs_disk_dquot_t *ddq;
xfs_dqid_t id;
boolean_t newdquot;
firstblock = NULLFSBLOCK;
mp = dqp->q_mount;
id = dqp->q_core.d_id;
nmaps = 1;
newdquot = B_FALSE;
/*
* If we don't know where the dquot lives, find out.
*/
if (dqp->q_blkno == (daddr_t) 0) {
/* We use the id as an index */
dqp->q_fileoffset = (xfs_fileoff_t) ((uint)id /
XFS_QM_DQPERBLK(mp));
nmaps = 1;
quotip = XFS_DQ_TO_QIP(dqp);
xfs_ilock(quotip, XFS_ILOCK_SHARED);
/*
* Return if this type of quotas is turned off while we didn't
* have an inode lock
*/
if (XFS_IS_THIS_QUOTA_OFF(dqp)) {
xfs_iunlock(quotip, XFS_ILOCK_SHARED);
return (ESRCH);
}
/*
* Find the block map; no allocations yet
*/
error = xfs_bmapi(NULL, quotip, dqp->q_fileoffset,
XFS_DQUOT_CLUSTER_SIZE_FSB,
XFS_BMAPI_METADATA,
&firstblock,
0,
&map, &nmaps, NULL);
xfs_iunlock(quotip, XFS_ILOCK_SHARED);
if (error)
return (error);
ASSERT(nmaps == 1);
ASSERT(map.br_blockcount == 1);
/*
* offset of dquot in the (fixed sized) dquot chunk.
*/
dqp->q_bufoffset = (id % XFS_QM_DQPERBLK(mp)) *
sizeof(xfs_dqblk_t);
if (map.br_startblock == HOLESTARTBLOCK) {
/*
* We don't allocate unless we're asked to
*/
if (!(flags & XFS_QMOPT_DQALLOC))
return (ENOENT);
ASSERT(tp);
if (error = xfs_qm_dqalloc(tp, mp, dqp, quotip,
dqp->q_fileoffset, &bp))
return (error);
newdquot = B_TRUE;
} else {
/*
* store the blkno etc so that we don't have to do the
* mapping all the time
*/
dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock);
}
}
ASSERT(dqp->q_blkno != DELAYSTARTBLOCK);
ASSERT(dqp->q_blkno != HOLESTARTBLOCK);
/*
* Read in the buffer, unless we've just done the allocation
* (in which case we already have the buf).
*/
if (! newdquot) {
xfs_dqtrace_entry(dqp, "DQTOBP READBUF");
if (error = xfs_trans_read_buf(tp, mp->m_dev,
dqp->q_blkno,
mp->QI_DQCHUNKLEN,
0, &bp)) {
return (error);
}
if (error || !bp)
return XFS_ERROR(error);
}
ASSERT(bp->b_flags & B_BUSY);
ASSERT(valusema(&bp->b_lock) <= 0);
/*
* calculate the location of the dquot inside the buffer.
*/
ddq = (xfs_disk_dquot_t *)((char *)bp->b_un.b_addr + dqp->q_bufoffset);
/*
* A simple sanity check in case we got a corrupted dquot...
*/
if (xfs_qm_dqcheck(ddq, id,
dqp->dq_flags & (XFS_DQ_USER|XFS_DQ_PROJ),
flags & (XFS_QMOPT_DQREPAIR|XFS_QMOPT_DOWARN),
"dqtobp")) {
if (!(flags & XFS_QMOPT_DQREPAIR)) {
xfs_trans_brelse(tp, bp);
return XFS_ERROR(EIO);
}
bp->b_flags |= B_DONE; /* We dirtied this */
}
*O_bpp = bp;
*O_ddpp = ddq;
return (0);
}
/*
* Read in the ondisk dquot using dqtobp() then copy it to an incore version,
* and release the buffer immediately.
*
*/
/* ARGSUSED */
STATIC int
xfs_qm_dqread(
xfs_trans_t *tp,
xfs_dqid_t id,
xfs_dquot_t *dqp, /* dquot to get filled in */
uint flags)
{
xfs_disk_dquot_t *ddqp;
buf_t *bp;
int error;
/*
* get a pointer to the on-disk dquot and the buffer containing it
* dqp already knows its own type (PROJ/USER).
*/
xfs_dqtrace_entry(dqp, "DQREAD");
if (error = xfs_qm_dqtobp(tp, dqp, &ddqp, &bp, flags)) {
return (error);
}
/* copy everything from disk dquot to the incore dquot */
bcopy(ddqp, &dqp->q_core, sizeof(xfs_disk_dquot_t));
ASSERT(dqp->q_core.d_id == id);
xfs_qm_dquot_logitem_init(dqp);
/*
* Reservation counters are defined as reservation plus current usage
* to avoid having to add everytime.
*/
dqp->q_res_bcount = ddqp->d_bcount;
dqp->q_res_icount = ddqp->d_icount;
dqp->q_res_rtbcount = ddqp->d_rtbcount;
/* Mark the buf so that this will stay incore a little longer */
bp->b_ref = XFS_DQUOT_REF;
/*
* We got the buffer with a xfs_trans_read_buf() (in dqtobp())
* So we need to release with xfs_trans_brelse().
* The strategy here is identical to that of inodes; we lock
* the dquot in xfs_qm_dqget() before making it accessible to
* others. This is because dquots, like inodes, need a good level of
* concurrency, and we don't want to take locks on the entire buffers
* for dquot accesses.
* Note also that the dquot buffer may even be dirty at this point, if
* this particular dquot was repaired. We still aren't afraid to
* brelse it because we have the changes incore.
*/
ASSERT(bp->b_flags & B_BUSY);
ASSERT(valusema(&bp->b_lock) <= 0);
xfs_trans_brelse(tp, bp);
return (error);
}
/*
* allocate an incore dquot from the kernel heap,
* and fill its core with quota information kept on disk.
* If XFS_QMOPT_DQALLOC is set, it'll allocate a dquot on disk
* if it wasn't already allocated.
*/
STATIC int
xfs_qm_idtodq(
xfs_mount_t *mp,
xfs_dqid_t id, /* prid or uid, depending on type */
uint type, /* UDQUOT or PDQUOT */
uint flags, /* DQALLOC, DQREPAIR */
xfs_dquot_t **O_dqpp)/* OUT : incore dquot, not locked */
{
xfs_dquot_t *dqp;
int error;
xfs_trans_t *tp;
int cancelflags;
dqp = xfs_qm_dqinit(mp, id, type);
tp = NULL;
if (flags & XFS_QMOPT_DQALLOC) {
tp = xfs_trans_alloc(mp, XFS_TRANS_QM_DQALLOC);
if (error = xfs_trans_reserve(tp,
mp->m_bm_maxlevels[XFS_DATA_FORK] +
XFS_DQUOT_CLUSTER_SIZE_FSB,
XFS_WRITE_LOG_RES(mp) +
BBTOB(mp->QI_DQCHUNKLEN) - 1 +
128,
0,
XFS_TRANS_PERM_LOG_RES,
XFS_WRITE_LOG_COUNT)) {
cancelflags = 0;
goto error_return;
}
cancelflags = XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT;
}
/*
* Read it from disk; xfs_dqread() takes care of
* all the necessary initialization of dquot's fields (locks, etc)
*/
if (error = xfs_qm_dqread(tp, id, dqp, flags)) {
/*
* This can happen if quotas got turned off (ESRCH),
* or if the dquot didn't exist on disk and we ask to
* allocate (ENOENT).
*/
xfs_dqtrace_entry(dqp, "DQREAD FAIL");
goto error_return;
}
if (tp) {
if (error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES)) {
xfs_qm_dqdestroy(dqp);
*O_dqpp = NULL;
return (error);
}
}
*O_dqpp = dqp;
ASSERT(! XFS_DQ_IS_LOCKED(dqp));
return (0);
error_return:
ASSERT(error);
if (tp)
xfs_trans_cancel(tp, cancelflags);
xfs_qm_dqdestroy(dqp);
*O_dqpp = NULL;
return (error);
}
/*
* Lookup a dquot in the incore dquot hashtable. We keep two separate
* hashtables for user and project dquots; and, these are global tables
* inside the XQM, not per-filesystem tables.
* The hash chain must be locked by caller, and it is left locked
* on return. Returning dquot is locked.
*/
STATIC int
xfs_qm_dqlookup(
xfs_mount_t *mp,
xfs_dqid_t id,
xfs_dqhash_t *qh,
xfs_dquot_t **O_dqpp)
{
xfs_dquot_t *dqp;
uint flist_locked;
xfs_dquot_t *d;
ASSERT(XFS_DQ_IS_HASH_LOCKED(qh));
flist_locked = B_FALSE;
/*
* Traverse the hashchain looking for a match
*/
for (dqp = qh->qh_next; dqp != NULL; dqp = dqp->HL_NEXT) {
/*
* We already have the hashlock. We don't need the
* dqlock to look at the id field of the dquot, since the
* id can't be modified without the hashlock anyway.
*/
if (dqp->q_core.d_id == id && dqp->q_mount == mp) {
xfs_dqtrace_entry(dqp, "DQFOUND BY LOOKUP");
/*
* All in core dquots must be on the dqlist of mp
*/
ASSERT(dqp->MPL_PREVP != NULL);
xfs_dqlock(dqp);
if (dqp->q_nrefs == 0) {
ASSERT (XFS_DQ_IS_ON_FREELIST(dqp));
if (! xfs_qm_freelist_lock_nowait(G_xqm)) {
xfs_dqtrace_entry(dqp, "DQLOOKUP: WANT");
/*
* We may have raced with dqreclaim_one()
* (and lost). So, flag that we don't
* want the dquot to be reclaimed.
*/
dqp->dq_flags |= XFS_DQ_WANT;
xfs_dqunlock(dqp);
xfs_qm_freelist_lock(G_xqm);
xfs_dqlock(dqp);
dqp->dq_flags &= ~(XFS_DQ_WANT);
}
flist_locked = B_TRUE;
}
/*
* id couldn't have changed; we had the hashlock all
* along
*/
ASSERT(dqp->q_core.d_id == id);
if (flist_locked) {
if (dqp->q_nrefs != 0) {
xfs_qm_freelist_unlock(G_xqm);
flist_locked = B_FALSE;
} else {
/*
* take it off the freelist
*/
xfs_dqtrace_entry(dqp,
"DQLOOKUP: TAKEOFF FL");
XQM_FREELIST_REMOVE(dqp);
/* xfs_qm_freelist_print(&(G_xqm->
qm_dqfreelist),
"after removal"); */
}
}
/*
* grab a reference
*/
XFS_DQHOLD(dqp);
if (flist_locked)
xfs_qm_freelist_unlock(G_xqm);
/*
* move the dquot to the front of the hashchain
*/
ASSERT(XFS_DQ_IS_HASH_LOCKED(qh));
if (dqp->HL_PREVP != &qh->qh_next) {
xfs_dqtrace_entry(dqp,
"DQLOOKUP: HASH MOVETOFRONT");
if (d = dqp->HL_NEXT)
d->HL_PREVP = dqp->HL_PREVP;
*(dqp->HL_PREVP) = d;
d = qh->qh_next;
d->HL_PREVP = &dqp->HL_NEXT;
dqp->HL_NEXT = d;
dqp->HL_PREVP = &qh->qh_next;
qh->qh_next = dqp;
}
xfs_dqtrace_entry(dqp, "LOOKUP END");
*O_dqpp = dqp;
ASSERT(XFS_DQ_IS_HASH_LOCKED(qh));
return (0);
}
}
*O_dqpp = NULL;
ASSERT(XFS_DQ_IS_HASH_LOCKED(qh));
return (1);
}
/*
* Given the file system, inode OR id, and type (UDQUOT/PDQUOT), return a
* a locked dquot, doing an allocation (if requested) as needed.
* When both an inode and an id are given, the inode's id takes precedence.
* That is, if the id changes while we dont hold the ilock inside this
* function, the new dquot is returned, not necessarily the one requested
* in the id argument.
*/
int
xfs_qm_dqget(
xfs_mount_t *mp,
xfs_inode_t *ip, /* locked inode (optional) */
xfs_dqid_t id, /* prid or uid, depending on type */
uint type, /* UDQUOT or PDQUOT */
uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */
xfs_dquot_t **O_dqpp) /* OUT : locked incore dquot */
{
xfs_dquot_t *dqp;
xfs_dqhash_t *h;
uint version;
int error;
ASSERT(XFS_IS_QUOTA_RUNNING(mp));
if ((! XFS_IS_UQUOTA_ON(mp) && type == XFS_DQ_USER) ||
(! XFS_IS_PQUOTA_ON(mp) && type == XFS_DQ_PROJ)) {
return (ESRCH);
}
h = XFS_DQ_HASH(mp, id, type);
#ifdef DEBUG
if (xfs_do_dqerror) {
if (xfs_dqerror_dev == mp->m_dev &&
(xfs_dqreq_num++ % xfs_dqerror_mod) == 0) {
printf("Returning error in dqget\n");
return (EIO);
}
}
#endif
again:
#ifdef DEBUG
ASSERT(type == XFS_DQ_USER || type == XFS_DQ_PROJ);
if (ip) {
ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
if (type == XFS_DQ_USER)
ASSERT(ip->i_udquot == NULL);
else
ASSERT(ip->i_pdquot == NULL);
}
#endif
XFS_DQ_HASH_LOCK(h);
/*
* Look in the cache (hashtable).
* The chain is kept locked during lookup.
*/
if (xfs_qm_dqlookup(mp, id, h, O_dqpp) == 0) {
#ifndef _IRIX62_XFS_ONLY
XFSSTATS.xs_qm_dqcachehits++;
#endif
/*
* The dquot was found, moved to the front of the chain,
* taken off the freelist if it was on it, and locked
* at this point. Just unlock the hashchain and return.
*/
ASSERT(*O_dqpp);
ASSERT(XFS_DQ_IS_LOCKED(*O_dqpp));
XFS_DQ_HASH_UNLOCK(h);
xfs_dqtrace_entry(*O_dqpp, "DQGET DONE (FROM CACHE)");
return (0); /* success */
}
#ifndef _IRIX62_XFS_ONLY
XFSSTATS.xs_qm_dqcachemisses++;
#endif
/*
* Dquot cache miss. We don't want to keep the inode lock across
* a (potential) disk read. Also we don't want to deal with the lock
* ordering between quotainode and this inode. OTOH, dropping the inode
* lock here means dealing with a chown that can happen before
* we re-acquire the lock.
*/
if (ip)
xfs_iunlock(ip, XFS_ILOCK_EXCL);
/*
* Save the hashchain version stamp, and unlock the chain, so that
* we don't keep the lock across a disk read
*/
version = h->qh_version;
XFS_DQ_HASH_UNLOCK(h);
/*
* Allocate the dquot on the kernel heap, and read the ondisk
* portion off the disk. Also, do all the necessary initialization
* This can return ENOENT if dquot didn't exist on disk and we didn't
* ask it to allocate; ESRCH if quotas got turned off suddenly.
*/
if (error = xfs_qm_idtodq(mp, id, type,
flags & (XFS_QMOPT_DQALLOC|XFS_QMOPT_DQREPAIR|
XFS_QMOPT_DOWARN),
&dqp)) {
if (ip)
xfs_ilock(ip, XFS_ILOCK_EXCL);
return (error);
}
/*
* See if this is mount code calling to look at the overall quota limits
* which are stored in the id == 0 user or project's dquot.
* Since we may not have done a quotacheck by this point, just return
* the dquot without attaching it to any hashtables, lists, etc, or even
* taking a reference.
* The caller must dqdestroy this once done.
*/
if (flags & XFS_QMOPT_DQSUSER) {
ASSERT(id == 0);
ASSERT(! ip);
goto dqret;
}
/*
* Dquot lock comes after hashlock in the lock ordering
*/
ASSERT(! XFS_DQ_IS_LOCKED(dqp));
if (ip) {
xfs_ilock(ip, XFS_ILOCK_EXCL);
if (! XFS_IS_DQTYPE_ON(mp, type)) {
/* inode stays locked on return */
xfs_qm_dqdestroy(dqp);
return (ESRCH);
}
/*
* A dquot could be attached to this inode by now, since
* we had dropped the ilock.
*/
if (type == XFS_DQ_USER) {
if (ip->i_udquot) {
xfs_qm_dqdestroy(dqp);
dqp = ip->i_udquot;
xfs_dqlock(dqp);
goto dqret;
}
} else {
if (ip->i_pdquot) {
xfs_qm_dqdestroy(dqp);
dqp = ip->i_pdquot;
xfs_dqlock(dqp);
goto dqret;
}
}
}
/*
* Hashlock comes after ilock in lock order
*/
XFS_DQ_HASH_LOCK(h);
if (version != h->qh_version) {
xfs_dquot_t *tmpdqp;
/*
* Now, see if somebody else put the dquot in the
* hashtable before us. This can happen because we didn't
* keep the hashchain lock. We don't have to worry about
* lock order between the two dquots here since dqp isn't
* on any findable lists yet.
*/
if (xfs_qm_dqlookup(mp, id, h, &tmpdqp) == 0) {
/*
* Duplicate found. Just throw away the new dquot
* and start over.
*/
xfs_qm_dqput(tmpdqp);
XFS_DQ_HASH_UNLOCK(h);
xfs_qm_dqdestroy(dqp);
#ifndef _IRIX62_XFS_ONLY
XFSSTATS.xs_qm_dquot_dups++;
#endif
goto again;
}
}
/*
* Put the dquot at the beginning of the hash-chain and mp's list
* LOCK ORDER: hashlock, freelistlock, mplistlock, udqlock, pdqlock ..
*/
ASSERT(XFS_DQ_IS_HASH_LOCKED(h));
dqp->q_hash = h;
XQM_HASHLIST_INSERT(h, dqp);
/*
* Attach this dquot to this filesystem's list of all dquots,
* kept inside the mount structure in m_quotainfo field
*/
xfs_qm_mplist_lock(mp);
/*
* We return a locked dquot to the caller, with a reference taken
*/
xfs_dqlock(dqp);
dqp->q_nrefs = 1;
XQM_MPLIST_INSERT(&(mp->QI_MPL_LIST), dqp);
xfs_qm_mplist_unlock(mp);
XFS_DQ_HASH_UNLOCK(h);
dqret:
ASSERT((ip == NULL) || XFS_ISLOCKED_INODE_EXCL(ip));
xfs_dqtrace_entry(dqp, "DQGET DONE");
*O_dqpp = dqp;
return (0);
}
/*
* Release a reference to the dquot (decrement ref-count)
* and unlock it. If there is a project quota attached to this
* dquot, carefully release that too without tripping over
* deadlocks'n'stuff.
*/
void
xfs_qm_dqput(
xfs_dquot_t *dqp)
{
xfs_dquot_t *pdqp;
ASSERT(dqp->q_nrefs > 0);
ASSERT(XFS_DQ_IS_LOCKED(dqp));
xfs_dqtrace_entry(dqp, "DQPUT");
if (dqp->q_nrefs != 1) {
dqp->q_nrefs--;
xfs_dqunlock(dqp);
return;
}
/*
* drop the dqlock and acquire the freelist and dqlock
* in the right order; but try to get it out-of-order first
*/
if (! xfs_qm_freelist_lock_nowait(G_xqm)) {
xfs_dqtrace_entry(dqp, "DQPUT: FLLOCK-WAIT");
xfs_dqunlock(dqp);
xfs_qm_freelist_lock(G_xqm);
xfs_dqlock(dqp);
}
while (1) {
pdqp = NULL;
/* We can't depend on nrefs being == 1 here */
if (--dqp->q_nrefs == 0) {
xfs_dqtrace_entry(dqp, "DQPUT: ON FREELIST");
/*
* insert at end of the freelist.
*/
XQM_FREELIST_INSERT(&(G_xqm->qm_dqfreelist), dqp);
/*
* If we just added a udquot to the freelist, then
* we want to release the pdquot reference that
* it (probably) has. Otherwise it'll keep the
* pdquot from getting reclaimed.
*/
if (pdqp = dqp->q_pdquot) {
/*
* Avoid a recursive dqput call
*/
xfs_dqlock(pdqp);
dqp->q_pdquot = NULL;
}
/* xfs_qm_freelist_print(&(G_xqm->qm_dqfreelist),
"@@@@@++ Free list (after append) @@@@@+");
*/
}
xfs_dqunlock(dqp);
/*
* If we had a proj quota inside the user quota as a hint,
* release it now.
*/
if (! pdqp)
break;
dqp = pdqp;
}
xfs_qm_freelist_unlock(G_xqm);
}
/*
* Release a dquot. Flush it if dirty, then dqput() it.
* dquot must not be locked.
*/
void
xfs_qm_dqrele(
xfs_dquot_t *dqp)
{
ASSERT(dqp);
xfs_dqtrace_entry(dqp, "DQRELE");
xfs_dqlock(dqp);
/*
* We don't care to flush it if the dquot is dirty here.
* That will create stutters that we want to avoid.
* Instead we do a delayed write when we try to reclaim
* a dirty dquot. Also xfs_sync will take part of the burden...
*/
xfs_qm_dqput(dqp);
}
/*
* write a modified dquot to disk.
* The dquot must be locked and the flush lock too taken by caller.
* The flush lock will not be unlocked until the dquot reaches the disk,
* but the dquot is free to be unlocked and modified by the caller
* in the interim. Dquot is still locked on return. This behavior is
* identical to that of inodes.
*/
int
xfs_qm_dqflush(
xfs_dquot_t *dqp,
uint flags)
{
xfs_mount_t *mp;
buf_t *bp;
xfs_disk_dquot_t *ddqp;
int error;
#ifdef _BANYAN_XFS
int s;
#else
SPLDECL(s);
#endif
ASSERT(XFS_DQ_IS_LOCKED(dqp));
ASSERT(XFS_DQ_IS_FLUSH_LOCKED(dqp));
xfs_dqtrace_entry(dqp, "DQFLUSH");
/*
* If not dirty, nada.
*/
if (!XFS_DQ_IS_DIRTY(dqp)) {
xfs_dqfunlock(dqp);
return (0);
}
/*
* Cant flush a pinned dquot. Wait for it.
*/
xfs_qm_dqunpin_wait(dqp);
/*
* Get the buffer containing the on-disk dquot
* We don't need a transaction envelope because we know that the
* the ondisk-dquot has already been allocated for.
*/
if (error = xfs_qm_dqtobp(NULL, dqp, &ddqp, &bp, XFS_QMOPT_DOWARN)) {
xfs_dqtrace_entry(dqp, "DQTOBP FAIL");
ASSERT(error != ENOENT);
/*
* Quotas could have gotten turned off (ESRCH)
*/
xfs_dqfunlock(dqp);
return (error);
}
if (xfs_qm_dqcheck(&dqp->q_core, ddqp->d_id, 0, XFS_QMOPT_DOWARN,
"dqflush (incore copy)")) {
cmn_err(CE_PANIC, "XFS: Can't flush invalid dquot");
/* NOTREACHED */
}
/* This is the only portion of data that needs to persist */
bcopy(&(dqp->q_core), ddqp, sizeof(xfs_disk_dquot_t));
/*
* Clear the dirty field and remember the flush lsn for later use.
*/
dqp->dq_flags &= ~(XFS_DQ_DIRTY);
mp = dqp->q_mount;
/* lsn is 64 bits */
#ifdef _BANYAN_XFS
s = AIL_LOCK(mp);
#else
AIL_LOCK(mp, s);
#endif
dqp->q_logitem.qli_flush_lsn = dqp->q_logitem.qli_item.li_lsn;
AIL_UNLOCK(mp, s);
/*
* Attach an iodone routine so that we can remove this dquot from the
* AIL and release the flush lock once the dquot is synced to disk.
*/
xfs_buf_attach_iodone(bp, (void(*)(buf_t*,xfs_log_item_t*))
xfs_qm_dqflush_done, &(dqp->q_logitem.qli_item));
/*
* If the buffer is pinned then push on the log so we won't
* get stuck waiting in the write for too long.
*/
if (bp->b_pincount > 0) {
xfs_dqtrace_entry(dqp, "DQFLUSH LOG FORCE");
xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
}
if (flags & XFS_QMOPT_DELWRI) {
bdwrite(bp);
} else if (flags & XFS_QMOPT_ASYNC) {
bawrite(bp);
} else {
error = bwrite(bp);
}
xfs_dqtrace_entry(dqp, "DQFLUSH END");
/*
* dqp is still locked, but caller is free to unlock it now.
*/
return (0);
}
/*
* This is the dquot flushing I/O completion routine. It is called
* from interrupt level when the buffer containing the dquot is
* flushed to disk. It is responsible for removing the dquot logitem
* from the AIL if it has not been re-logged, and unlocking the dquot's
* flush lock. This behavior is very similar to that of inodes..
*/
/*ARGSUSED*/
STATIC void
xfs_qm_dqflush_done(
buf_t *bp,
xfs_dq_logitem_t *qip)
{
xfs_dquot_t *dqp;
#ifdef _BANYAN_XFS
int s;
#else
SPLDECL(s);
#endif
dqp = qip->qli_dquot;
/*
* We only want to pull the item from the AIL if its
* location in the log has not changed since we started the flush.
* Thus, we only bother if the dquot's lsn has
* not changed. First we check the lsn outside the lock
* since it's cheaper, and then we recheck while
* holding the lock before removing the dquot from the AIL.
*/
if ((qip->qli_item.li_flags & XFS_LI_IN_AIL) &&
qip->qli_item.li_lsn == qip->qli_flush_lsn) {
#ifdef _BANYAN_XFS
s = AIL_LOCK(dqp->q_mount);
#else
AIL_LOCK(dqp->q_mount, s);
#endif
/*
* xfs_trans_delete_ail() drops the AIL lock.
*/
if (qip->qli_item.li_lsn == qip->qli_flush_lsn)
xfs_trans_delete_ail(dqp->q_mount,
(xfs_log_item_t*)qip, s);
else
AIL_UNLOCK(dqp->q_mount, s);
}
/*
* Release the dq's flush lock since we're done with it.
*/
xfs_dqfunlock(dqp);
}
int
xfs_qm_dqflock_nowait(
xfs_dquot_t *dqp)
{
int locked;
locked = cpsema(&((dqp)->q_flock));
/* XXX ifdef these out */
if (locked)
(dqp)->dq_flags |= XFS_DQ_FLOCKED;
return (locked);
}
int
xfs_qm_dqlock_nowait(
xfs_dquot_t *dqp)
{
return (mutex_trylock(&((dqp)->q_qlock)));
}
void
xfs_dqlock(
xfs_dquot_t *dqp)
{
mutex_lock(&(dqp->q_qlock), PINOD);
}
void
xfs_dqunlock(
xfs_dquot_t *dqp)
{
mutex_unlock(&(dqp->q_qlock));
if (dqp->q_logitem.qli_dquot == dqp) {
xfs_trans_unlocked_item(dqp->q_mount,
(xfs_log_item_t*)&(dqp->q_logitem));
}
}
void
xfs_dqunlock_nonotify(
xfs_dquot_t *dqp)
{
mutex_unlock(&(dqp->q_qlock));
}
void
xfs_dqlock2(
xfs_dquot_t *d1,
xfs_dquot_t *d2)
{
if (d1 && d2) {
ASSERT(d1 != d2);
if (d1->q_core.d_id > d2->q_core.d_id) {
xfs_dqlock(d2);
xfs_dqlock(d1);
} else {
xfs_dqlock(d1);
xfs_dqlock(d2);
}
} else {
if (d1) {
xfs_dqlock(d1);
} else if (d2) {
xfs_dqlock(d2);
}
}
}
/*
* A rarely used accessor. This exists because we don't really want
* to expose the internals of a dquot to the outside world.
*/
xfs_dqid_t
xfs_qm_dqid(
xfs_dquot_t *dqp)
{
return (dqp->q_core.d_id);
}
/*
* Take a dquot out of the mount's dqlist as well as the hashlist.
* This is called via unmount as well as quotaoff, and the purge
* will always succeed.
*/
/* ARGSUSED */
int
xfs_qm_dqpurge(
xfs_dquot_t *dqp,
uint flags)
{
xfs_dqhash_t *thishash;
xfs_mount_t *mp;
mp = dqp->q_mount;
ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp));
ASSERT(XFS_DQ_IS_HASH_LOCKED(dqp->q_hash));
xfs_dqlock(dqp);
/*
* We really can't afford to purge a dquot that is
* referenced, because these are hard refs.
* It shouldn't happen in general because we went thru _all_ inodes in
* dqrele_all_inodes before calling this and didn't let the mountlock go.
* However it is possible that we have dquots with temporary
* references that are not attached to an inode. e.g. see xfs_setattr().
*/
if (dqp->q_nrefs != 0) {
xfs_dqunlock(dqp);
XFS_DQ_HASH_UNLOCK(dqp->q_hash);
return (1);
}
ASSERT(XFS_DQ_IS_ON_FREELIST(dqp));
/*
* If we're turning off quotas, we have to make sure that, for
* example, we don't delete quota disk blocks while dquots are
* in the process of getting written to those disk blocks.
* This dquot might well be on AIL, and we can't leave it there
* if we're turning off quotas. Basically, we need this flush
* lock, and are willing to block on it.
*/
if (! xfs_qm_dqflock_nowait(dqp)) {
/*
* Block on the flush lock after nudging dquot buffer,
* if it is incore.
*/
xfs_qm_dqflock_pushbuf_wait(dqp);
}
/*
* XXXIf we're turning this type of quotas off, we don't care
* about the dirty metadata sitting in this dquot. OTOH, if
* we're unmounting, we do care, so we flush it and wait.
*/
if (XFS_DQ_IS_DIRTY(dqp)) {
xfs_dqtrace_entry(dqp, "DQPURGE ->DQFLUSH: DQDIRTY");
/* dqflush unlocks dqflock */
/*
* Given that dqpurge is a very rare occurence, it is OK
* that we're holding the hashlist and mplist locks
* across the disk write. But, ... XXXsup
*/
(void) xfs_qm_dqflush(dqp, XFS_QMOPT_SYNC);
xfs_dqflock(dqp);
}
ASSERT(dqp->q_pincount == 0);
ASSERT(! (dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
thishash = dqp->q_hash;
XQM_HASHLIST_REMOVE(thishash, dqp);
XQM_MPLIST_REMOVE(&(mp->QI_MPL_LIST), dqp);
/*
* XXX Move this to the front of the freelist, if we can get the
* freelist lock.
*/
ASSERT(XFS_DQ_IS_ON_FREELIST(dqp));
dqp->q_mount = NULL;;
dqp->q_hash = NULL;
dqp->dq_flags = XFS_DQ_INACTIVE;
bzero(&dqp->q_core, sizeof(dqp->q_core));
xfs_dqfunlock(dqp);
xfs_dqunlock(dqp);
XFS_DQ_HASH_UNLOCK(thishash);
return (0);
}
/*
* Do some primitive error checking on ondisk dquot
* data structures. Not just for debugging, actually;
* this can be useful for detecting data corruption mainly due to
* disk failures.
*/
/* ARGSUSED */
int
xfs_qm_dqcheck(
xfs_disk_dquot_t *ddq,
xfs_dqid_t id,
uint type, /* used only when IO_dorepair is true */
uint flags,
char *str)
{
int errs;
errs = 0;
/* ASSERT(flags & (XFS_QMOPT_DQREPAIR|XFS_QMOPT_DOWARN)); */
/*
* We can encounter an uninitialized dquot buffer for 2 reasons:
* 1. If we crash while deleting the quotainode(s), and those blks get used
* for some user data. This is because we take the path of regular
* file deletion; however, the size field of quotainodes is never
* updated, so all the tricks that we play in itruncate_finish
* don't quite matter.
*
* 2. We don't play the quota buffers when there's a quotaoff logitem.
* But the allocation will be replayed so we'll end up with an
* uninitialized quota block.
*
* This is all fine; things are still consistent, and we haven't lost
* any quota information. Just don't complain about bad dquot blks.
*/
if (ddq->d_magic != XFS_DQUOT_MAGIC) {
if (flags & XFS_QMOPT_DOWARN)
cmn_err(CE_ALERT,
"%s : XFS dquot ID 0x%x, magic 0x%x != 0x%x",
str, id, ddq->d_magic, XFS_DQUOT_MAGIC);
errs++;
}
if (ddq->d_version != XFS_DQUOT_VERSION) {
if (flags & XFS_QMOPT_DOWARN)
cmn_err(CE_ALERT,
"%s : XFS dquot ID 0x%x, version 0x%x != 0x%x",
str, id, ddq->d_magic, XFS_DQUOT_VERSION);
errs++;
}
if (ddq->d_flags != XFS_DQ_USER && ddq->d_flags != XFS_DQ_PROJ) {
if (flags & XFS_QMOPT_DOWARN)
cmn_err(CE_ALERT,
"%s : XFS dquot ID 0x%x, unknown flags 0x%x",
str, id, ddq->d_flags);
errs++;
}
if (id != -1 && id != ddq->d_id) {
if (flags & XFS_QMOPT_DOWARN)
cmn_err(CE_ALERT,
"%s : ondisk-dquot 0x%x, ID mismatch: "
"0x%x expected, found id 0x%x",
str, ddq, id, ddq->d_id);
errs++;
}
if (! errs) {
if (ddq->d_blk_softlimit &&
ddq->d_bcount >= ddq->d_blk_softlimit) {
if (ddq->d_btimer == 0 && ddq->d_id != 0) {
if (flags & XFS_QMOPT_DOWARN)
cmn_err(CE_ALERT,
"%s : Dquot ID 0x%x (0x%x) "
"BLK TIMER NOT STARTED",
str, (int) ddq->d_id, ddq);
errs++;
}
}
if (ddq->d_ino_softlimit &&
ddq->d_icount >= ddq->d_ino_softlimit) {
if (ddq->d_itimer == 0 && ddq->d_id != 0) {
if (flags & XFS_QMOPT_DOWARN)
cmn_err(CE_ALERT,
"%s : Dquot ID 0x%x (0x%x) "
"INODE TIMER NOT STARTED",
str, (int) ddq->d_id, ddq);
errs++;
}
}
}
if (!errs || !(flags & XFS_QMOPT_DQREPAIR))
return (errs);
if (flags & XFS_QMOPT_DOWARN)
cmn_err(CE_NOTE, "Re-initializing dquot ID 0x%x", id);
/*
* Typically, a repair is only requested by quotacheck.
*/
ASSERT(id != -1);
ASSERT(flags & XFS_QMOPT_DQREPAIR);
bzero(ddq, sizeof(xfs_dqblk_t));
xfs_qm_dqinit_core(id, type, (xfs_dqblk_t *)ddq);
return (errs);
}
#ifdef QUOTADEBUG
void
xfs_qm_dqprint(xfs_dquot_t *dqp)
{
printf( "-----------KERNEL DQUOT----------------\n");
printf( "---- dquot ID = %d\n", (int) dqp->q_core.d_id);
printf( "---- type = %s\n", XFS_QM_ISUDQ(dqp) ? "USR" :
"PRJ");
printf( "---- fs = 0x%x\n", dqp->q_mount);
printf( "---- blkno = 0x%x\n", (int) dqp->q_blkno);
printf( "---- boffset = 0x%x\n", (int) dqp->q_bufoffset);
printf( "---- blkhlimit = %llu (0x%x)\n",
dqp->q_core.d_blk_hardlimit,
(int) dqp->q_core.d_blk_hardlimit);
printf( "---- blkslimit = %llu (0x%x)\n",
dqp->q_core.d_blk_softlimit,
(int)dqp->q_core.d_blk_softlimit);
printf( "---- inohlimit = %llu (0x%x)\n",
dqp->q_core.d_ino_hardlimit,
(int)dqp->q_core.d_ino_hardlimit);
printf( "---- inoslimit = %llu (0x%x)\n",
dqp->q_core.d_ino_softlimit,
(int)dqp->q_core.d_ino_softlimit);
printf( "---- bcount = %llu (0x%x)\n",
dqp->q_core.d_bcount,
(int)dqp->q_core.d_bcount);
printf( "---- icount = %llu (0x%x)\n",
dqp->q_core.d_icount,
(int)dqp->q_core.d_icount);
printf( "---- btimer = %d\n", (int)dqp->q_core.d_btimer);
printf( "---- itimer = %d\n", (int)dqp->q_core.d_itimer);
printf( "---------------------------\n");
}
#endif
/*
* Give the buffer a little push if it is incore and
* wait on the flush lock.
*/
void
xfs_qm_dqflock_pushbuf_wait(
xfs_dquot_t *dqp)
{
buf_t *bp;
/*
* Check to see if the dquot has been flushed delayed
* write. If so, grab its buffer and send it
* out immediately. We'll be able to acquire
* the flush lock when the I/O completes.
*/
bp = incore(dqp->q_dev, dqp->q_blkno,
dqp->q_mount->QI_DQCHUNKLEN,
INCORE_TRYLOCK);
if (bp != NULL) {
if (bp->b_flags & B_DELWRI) {
if (bp->b_pincount > 0) {
xfs_log_force(dqp->q_mount,
(xfs_lsn_t)0,
XFS_LOG_FORCE);
}
bawrite(bp);
} else {
brelse(bp);
}
}
xfs_dqflock(dqp);
}
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