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-rw-r--r--fs/xfs/quota/xfs_qm.c2462
1 files changed, 0 insertions, 2462 deletions
diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c
deleted file mode 100644
index e70c7fc..0000000
--- a/fs/xfs/quota/xfs_qm.c
+++ /dev/null
@@ -1,2462 +0,0 @@
-/*
- * Copyright (c) 2000-2005 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_bit.h"
-#include "xfs_log.h"
-#include "xfs_inum.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_ag.h"
-#include "xfs_alloc.h"
-#include "xfs_quota.h"
-#include "xfs_mount.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_ialloc_btree.h"
-#include "xfs_dinode.h"
-#include "xfs_inode.h"
-#include "xfs_ialloc.h"
-#include "xfs_itable.h"
-#include "xfs_rtalloc.h"
-#include "xfs_error.h"
-#include "xfs_bmap.h"
-#include "xfs_attr.h"
-#include "xfs_buf_item.h"
-#include "xfs_trans_space.h"
-#include "xfs_utils.h"
-#include "xfs_qm.h"
-#include "xfs_trace.h"
-
-/*
- * The global quota manager. There is only one of these for the entire
- * system, _not_ one per file system. XQM keeps track of the overall
- * quota functionality, including maintaining the freelist and hash
- * tables of dquots.
- */
-struct mutex xfs_Gqm_lock;
-struct xfs_qm *xfs_Gqm;
-uint ndquot;
-
-kmem_zone_t *qm_dqzone;
-kmem_zone_t *qm_dqtrxzone;
-
-STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int);
-STATIC void xfs_qm_list_destroy(xfs_dqlist_t *);
-
-STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
-STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
-STATIC int xfs_qm_shake(struct shrinker *, struct shrink_control *);
-
-static struct shrinker xfs_qm_shaker = {
- .shrink = xfs_qm_shake,
- .seeks = DEFAULT_SEEKS,
-};
-
-#ifdef DEBUG
-extern struct mutex qcheck_lock;
-#endif
-
-#ifdef QUOTADEBUG
-static void
-xfs_qm_dquot_list_print(
- struct xfs_mount *mp)
-{
- xfs_dquot_t *dqp;
- int i = 0;
-
- list_for_each_entry(dqp, &mp->m_quotainfo->qi_dqlist_lock, qi_mplist) {
- xfs_debug(mp, " %d. \"%d (%s)\" "
- "bcnt = %lld, icnt = %lld, refs = %d",
- i++, be32_to_cpu(dqp->q_core.d_id),
- DQFLAGTO_TYPESTR(dqp),
- (long long)be64_to_cpu(dqp->q_core.d_bcount),
- (long long)be64_to_cpu(dqp->q_core.d_icount),
- dqp->q_nrefs);
- }
-}
-#else
-static void xfs_qm_dquot_list_print(struct xfs_mount *mp) { }
-#endif
-
-/*
- * Initialize the XQM structure.
- * Note that there is not one quota manager per file system.
- */
-STATIC struct xfs_qm *
-xfs_Gqm_init(void)
-{
- xfs_dqhash_t *udqhash, *gdqhash;
- xfs_qm_t *xqm;
- size_t hsize;
- uint i;
-
- /*
- * Initialize the dquot hash tables.
- */
- udqhash = kmem_zalloc_greedy(&hsize,
- XFS_QM_HASHSIZE_LOW * sizeof(xfs_dqhash_t),
- XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t));
- if (!udqhash)
- goto out;
-
- gdqhash = kmem_zalloc_large(hsize);
- if (!gdqhash)
- goto out_free_udqhash;
-
- hsize /= sizeof(xfs_dqhash_t);
- ndquot = hsize << 8;
-
- xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP);
- xqm->qm_dqhashmask = hsize - 1;
- xqm->qm_usr_dqhtable = udqhash;
- xqm->qm_grp_dqhtable = gdqhash;
- ASSERT(xqm->qm_usr_dqhtable != NULL);
- ASSERT(xqm->qm_grp_dqhtable != NULL);
-
- for (i = 0; i < hsize; i++) {
- xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i);
- xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i);
- }
-
- /*
- * Freelist of all dquots of all file systems
- */
- INIT_LIST_HEAD(&xqm->qm_dqfrlist);
- xqm->qm_dqfrlist_cnt = 0;
- mutex_init(&xqm->qm_dqfrlist_lock);
-
- /*
- * dquot zone. we register our own low-memory callback.
- */
- if (!qm_dqzone) {
- xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t),
- "xfs_dquots");
- qm_dqzone = xqm->qm_dqzone;
- } else
- xqm->qm_dqzone = qm_dqzone;
-
- register_shrinker(&xfs_qm_shaker);
-
- /*
- * The t_dqinfo portion of transactions.
- */
- if (!qm_dqtrxzone) {
- xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t),
- "xfs_dqtrx");
- qm_dqtrxzone = xqm->qm_dqtrxzone;
- } else
- xqm->qm_dqtrxzone = qm_dqtrxzone;
-
- atomic_set(&xqm->qm_totaldquots, 0);
- xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO;
- xqm->qm_nrefs = 0;
-#ifdef DEBUG
- mutex_init(&qcheck_lock);
-#endif
- return xqm;
-
- out_free_udqhash:
- kmem_free_large(udqhash);
- out:
- return NULL;
-}
-
-/*
- * Destroy the global quota manager when its reference count goes to zero.
- */
-STATIC void
-xfs_qm_destroy(
- struct xfs_qm *xqm)
-{
- struct xfs_dquot *dqp, *n;
- int hsize, i;
-
- ASSERT(xqm != NULL);
- ASSERT(xqm->qm_nrefs == 0);
- unregister_shrinker(&xfs_qm_shaker);
- hsize = xqm->qm_dqhashmask + 1;
- for (i = 0; i < hsize; i++) {
- xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
- xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i]));
- }
- kmem_free_large(xqm->qm_usr_dqhtable);
- kmem_free_large(xqm->qm_grp_dqhtable);
- xqm->qm_usr_dqhtable = NULL;
- xqm->qm_grp_dqhtable = NULL;
- xqm->qm_dqhashmask = 0;
-
- /* frlist cleanup */
- mutex_lock(&xqm->qm_dqfrlist_lock);
- list_for_each_entry_safe(dqp, n, &xqm->qm_dqfrlist, q_freelist) {
- xfs_dqlock(dqp);
-#ifdef QUOTADEBUG
- xfs_debug(dqp->q_mount, "FREELIST destroy 0x%p", dqp);
-#endif
- list_del_init(&dqp->q_freelist);
- xfs_Gqm->qm_dqfrlist_cnt--;
- xfs_dqunlock(dqp);
- xfs_qm_dqdestroy(dqp);
- }
- mutex_unlock(&xqm->qm_dqfrlist_lock);
- mutex_destroy(&xqm->qm_dqfrlist_lock);
-#ifdef DEBUG
- mutex_destroy(&qcheck_lock);
-#endif
- kmem_free(xqm);
-}
-
-/*
- * Called at mount time to let XQM know that another file system is
- * starting quotas. This isn't crucial information as the individual mount
- * structures are pretty independent, but it helps the XQM keep a
- * global view of what's going on.
- */
-/* ARGSUSED */
-STATIC int
-xfs_qm_hold_quotafs_ref(
- struct xfs_mount *mp)
-{
- /*
- * Need to lock the xfs_Gqm structure for things like this. For example,
- * the structure could disappear between the entry to this routine and
- * a HOLD operation if not locked.
- */
- mutex_lock(&xfs_Gqm_lock);
-
- if (!xfs_Gqm) {
- xfs_Gqm = xfs_Gqm_init();
- if (!xfs_Gqm) {
- mutex_unlock(&xfs_Gqm_lock);
- return ENOMEM;
- }
- }
-
- /*
- * We can keep a list of all filesystems with quotas mounted for
- * debugging and statistical purposes, but ...
- * Just take a reference and get out.
- */
- xfs_Gqm->qm_nrefs++;
- mutex_unlock(&xfs_Gqm_lock);
-
- return 0;
-}
-
-
-/*
- * Release the reference that a filesystem took at mount time,
- * so that we know when we need to destroy the entire quota manager.
- */
-/* ARGSUSED */
-STATIC void
-xfs_qm_rele_quotafs_ref(
- struct xfs_mount *mp)
-{
- xfs_dquot_t *dqp, *n;
-
- ASSERT(xfs_Gqm);
- ASSERT(xfs_Gqm->qm_nrefs > 0);
-
- /*
- * Go thru the freelist and destroy all inactive dquots.
- */
- mutex_lock(&xfs_Gqm->qm_dqfrlist_lock);
-
- list_for_each_entry_safe(dqp, n, &xfs_Gqm->qm_dqfrlist, q_freelist) {
- xfs_dqlock(dqp);
- if (dqp->dq_flags & XFS_DQ_INACTIVE) {
- ASSERT(dqp->q_mount == NULL);
- ASSERT(! XFS_DQ_IS_DIRTY(dqp));
- ASSERT(list_empty(&dqp->q_hashlist));
- ASSERT(list_empty(&dqp->q_mplist));
- list_del_init(&dqp->q_freelist);
- xfs_Gqm->qm_dqfrlist_cnt--;
- xfs_dqunlock(dqp);
- xfs_qm_dqdestroy(dqp);
- } else {
- xfs_dqunlock(dqp);
- }
- }
- mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
-
- /*
- * Destroy the entire XQM. If somebody mounts with quotaon, this'll
- * be restarted.
- */
- mutex_lock(&xfs_Gqm_lock);
- if (--xfs_Gqm->qm_nrefs == 0) {
- xfs_qm_destroy(xfs_Gqm);
- xfs_Gqm = NULL;
- }
- mutex_unlock(&xfs_Gqm_lock);
-}
-
-/*
- * Just destroy the quotainfo structure.
- */
-void
-xfs_qm_unmount(
- struct xfs_mount *mp)
-{
- if (mp->m_quotainfo) {
- xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
- xfs_qm_destroy_quotainfo(mp);
- }
-}
-
-
-/*
- * This is called from xfs_mountfs to start quotas and initialize all
- * necessary data structures like quotainfo. This is also responsible for
- * running a quotacheck as necessary. We are guaranteed that the superblock
- * is consistently read in at this point.
- *
- * If we fail here, the mount will continue with quota turned off. We don't
- * need to inidicate success or failure at all.
- */
-void
-xfs_qm_mount_quotas(
- xfs_mount_t *mp)
-{
- int error = 0;
- uint sbf;
-
- /*
- * If quotas on realtime volumes is not supported, we disable
- * quotas immediately.
- */
- if (mp->m_sb.sb_rextents) {
- xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
- mp->m_qflags = 0;
- goto write_changes;
- }
-
- ASSERT(XFS_IS_QUOTA_RUNNING(mp));
-
- /*
- * Allocate the quotainfo structure inside the mount struct, and
- * create quotainode(s), and change/rev superblock if necessary.
- */
- error = xfs_qm_init_quotainfo(mp);
- if (error) {
- /*
- * We must turn off quotas.
- */
- ASSERT(mp->m_quotainfo == NULL);
- mp->m_qflags = 0;
- goto write_changes;
- }
- /*
- * If any of the quotas are not consistent, do a quotacheck.
- */
- if (XFS_QM_NEED_QUOTACHECK(mp)) {
- error = xfs_qm_quotacheck(mp);
- if (error) {
- /* Quotacheck failed and disabled quotas. */
- return;
- }
- }
- /*
- * If one type of quotas is off, then it will lose its
- * quotachecked status, since we won't be doing accounting for
- * that type anymore.
- */
- if (!XFS_IS_UQUOTA_ON(mp))
- mp->m_qflags &= ~XFS_UQUOTA_CHKD;
- if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
- mp->m_qflags &= ~XFS_OQUOTA_CHKD;
-
- write_changes:
- /*
- * We actually don't have to acquire the m_sb_lock at all.
- * This can only be called from mount, and that's single threaded. XXX
- */
- spin_lock(&mp->m_sb_lock);
- sbf = mp->m_sb.sb_qflags;
- mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
- spin_unlock(&mp->m_sb_lock);
-
- if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
- if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
- /*
- * We could only have been turning quotas off.
- * We aren't in very good shape actually because
- * the incore structures are convinced that quotas are
- * off, but the on disk superblock doesn't know that !
- */
- ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
- xfs_alert(mp, "%s: Superblock update failed!",
- __func__);
- }
- }
-
- if (error) {
- xfs_warn(mp, "Failed to initialize disk quotas.");
- return;
- }
-
-#ifdef QUOTADEBUG
- if (XFS_IS_QUOTA_ON(mp))
- xfs_qm_internalqcheck(mp);
-#endif
-}
-
-/*
- * Called from the vfsops layer.
- */
-void
-xfs_qm_unmount_quotas(
- xfs_mount_t *mp)
-{
- /*
- * Release the dquots that root inode, et al might be holding,
- * before we flush quotas and blow away the quotainfo structure.
- */
- ASSERT(mp->m_rootip);
- xfs_qm_dqdetach(mp->m_rootip);
- if (mp->m_rbmip)
- xfs_qm_dqdetach(mp->m_rbmip);
- if (mp->m_rsumip)
- xfs_qm_dqdetach(mp->m_rsumip);
-
- /*
- * Release the quota inodes.
- */
- if (mp->m_quotainfo) {
- if (mp->m_quotainfo->qi_uquotaip) {
- IRELE(mp->m_quotainfo->qi_uquotaip);
- mp->m_quotainfo->qi_uquotaip = NULL;
- }
- if (mp->m_quotainfo->qi_gquotaip) {
- IRELE(mp->m_quotainfo->qi_gquotaip);
- mp->m_quotainfo->qi_gquotaip = NULL;
- }
- }
-}
-
-/*
- * Flush all dquots of the given file system to disk. The dquots are
- * _not_ purged from memory here, just their data written to disk.
- */
-STATIC int
-xfs_qm_dqflush_all(
- struct xfs_mount *mp,
- int sync_mode)
-{
- struct xfs_quotainfo *q = mp->m_quotainfo;
- int recl;
- struct xfs_dquot *dqp;
- int error;
-
- if (!q)
- return 0;
-again:
- mutex_lock(&q->qi_dqlist_lock);
- list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
- xfs_dqlock(dqp);
- if (! XFS_DQ_IS_DIRTY(dqp)) {
- xfs_dqunlock(dqp);
- continue;
- }
-
- /* XXX a sentinel would be better */
- recl = q->qi_dqreclaims;
- if (!xfs_dqflock_nowait(dqp)) {
- /*
- * If we can't grab the flush lock then 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.
- */
- xfs_qm_dqflock_pushbuf_wait(dqp);
- }
- /*
- * Let go of the mplist lock. We don't want to hold it
- * across a disk write.
- */
- mutex_unlock(&q->qi_dqlist_lock);
- error = xfs_qm_dqflush(dqp, sync_mode);
- xfs_dqunlock(dqp);
- if (error)
- return error;
-
- mutex_lock(&q->qi_dqlist_lock);
- if (recl != q->qi_dqreclaims) {
- mutex_unlock(&q->qi_dqlist_lock);
- /* XXX restart limit */
- goto again;
- }
- }
-
- mutex_unlock(&q->qi_dqlist_lock);
- /* return ! busy */
- return 0;
-}
-/*
- * Release the group dquot pointers the user dquots may be
- * carrying around as a hint. mplist is locked on entry and exit.
- */
-STATIC void
-xfs_qm_detach_gdquots(
- struct xfs_mount *mp)
-{
- struct xfs_quotainfo *q = mp->m_quotainfo;
- struct xfs_dquot *dqp, *gdqp;
- int nrecl;
-
- again:
- ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
- list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
- xfs_dqlock(dqp);
- if ((gdqp = dqp->q_gdquot)) {
- xfs_dqlock(gdqp);
- dqp->q_gdquot = NULL;
- }
- xfs_dqunlock(dqp);
-
- if (gdqp) {
- /*
- * Can't hold the mplist lock across a dqput.
- * XXXmust convert to marker based iterations here.
- */
- nrecl = q->qi_dqreclaims;
- mutex_unlock(&q->qi_dqlist_lock);
- xfs_qm_dqput(gdqp);
-
- mutex_lock(&q->qi_dqlist_lock);
- if (nrecl != q->qi_dqreclaims)
- goto again;
- }
- }
-}
-
-/*
- * Go through all the incore dquots of this file system and take them
- * off the mplist and hashlist, if the dquot type matches the dqtype
- * parameter. This is used when turning off quota accounting for
- * users and/or groups, as well as when the filesystem is unmounting.
- */
-STATIC int
-xfs_qm_dqpurge_int(
- struct xfs_mount *mp,
- uint flags)
-{
- struct xfs_quotainfo *q = mp->m_quotainfo;
- struct xfs_dquot *dqp, *n;
- uint dqtype;
- int nrecl;
- int nmisses;
-
- if (!q)
- return 0;
-
- dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0;
- dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0;
- dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0;
-
- mutex_lock(&q->qi_dqlist_lock);
-
- /*
- * In the first pass through all incore dquots of this filesystem,
- * we release the group dquot pointers the user dquots may be
- * carrying around as a hint. We need to do this irrespective of
- * what's being turned off.
- */
- xfs_qm_detach_gdquots(mp);
-
- again:
- nmisses = 0;
- ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
- /*
- * Try to get rid of all of the unwanted dquots. The idea is to
- * get them off mplist and hashlist, but leave them on freelist.
- */
- list_for_each_entry_safe(dqp, n, &q->qi_dqlist, q_mplist) {
- /*
- * It's OK to look at the type without taking dqlock here.
- * We're holding the mplist lock here, and that's needed for
- * a dqreclaim.
- */
- if ((dqp->dq_flags & dqtype) == 0)
- continue;
-
- if (!mutex_trylock(&dqp->q_hash->qh_lock)) {
- nrecl = q->qi_dqreclaims;
- mutex_unlock(&q->qi_dqlist_lock);
- mutex_lock(&dqp->q_hash->qh_lock);
- mutex_lock(&q->qi_dqlist_lock);
-
- /*
- * XXXTheoretically, we can get into a very long
- * ping pong game here.
- * No one can be adding dquots to the mplist at
- * this point, but somebody might be taking things off.
- */
- if (nrecl != q->qi_dqreclaims) {
- mutex_unlock(&dqp->q_hash->qh_lock);
- goto again;
- }
- }
-
- /*
- * Take the dquot off the mplist and hashlist. It may remain on
- * freelist in INACTIVE state.
- */
- nmisses += xfs_qm_dqpurge(dqp);
- }
- mutex_unlock(&q->qi_dqlist_lock);
- return nmisses;
-}
-
-int
-xfs_qm_dqpurge_all(
- xfs_mount_t *mp,
- uint flags)
-{
- int ndquots;
-
- /*
- * Purge the dquot cache.
- * None of the dquots should really be busy at this point.
- */
- if (mp->m_quotainfo) {
- while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) {
- delay(ndquots * 10);
- }
- }
- return 0;
-}
-
-STATIC int
-xfs_qm_dqattach_one(
- xfs_inode_t *ip,
- xfs_dqid_t id,
- uint type,
- uint doalloc,
- xfs_dquot_t *udqhint, /* hint */
- xfs_dquot_t **IO_idqpp)
-{
- xfs_dquot_t *dqp;
- int error;
-
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
- error = 0;
-
- /*
- * See if we already have it in the inode itself. IO_idqpp is
- * &i_udquot or &i_gdquot. This made the code look weird, but
- * made the logic a lot simpler.
- */
- dqp = *IO_idqpp;
- if (dqp) {
- trace_xfs_dqattach_found(dqp);
- return 0;
- }
-
- /*
- * udqhint is the i_udquot field in inode, and is non-NULL only
- * when the type arg is group/project. Its purpose is to save a
- * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
- * the user dquot.
- */
- if (udqhint) {
- ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
- xfs_dqlock(udqhint);
-
- /*
- * No need to take dqlock to look at the id.
- *
- * The ID can't change until it gets reclaimed, and it won't
- * be reclaimed as long as we have a ref from inode and we
- * hold the ilock.
- */
- dqp = udqhint->q_gdquot;
- if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
- xfs_dqlock(dqp);
- XFS_DQHOLD(dqp);
- ASSERT(*IO_idqpp == NULL);
- *IO_idqpp = dqp;
-
- xfs_dqunlock(dqp);
- xfs_dqunlock(udqhint);
- return 0;
- }
-
- /*
- * We can't hold a dquot lock when we call the dqget code.
- * We'll deadlock in no time, because of (not conforming to)
- * lock ordering - the inodelock comes before any dquot lock,
- * and we may drop and reacquire the ilock in xfs_qm_dqget().
- */
- xfs_dqunlock(udqhint);
- }
-
- /*
- * Find the dquot from somewhere. This bumps the
- * reference count of dquot and returns it locked.
- * 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.
- */
- error = xfs_qm_dqget(ip->i_mount, ip, id, type,
- doalloc | XFS_QMOPT_DOWARN, &dqp);
- if (error)
- return error;
-
- trace_xfs_dqattach_get(dqp);
-
- /*
- * dqget may have dropped and re-acquired the ilock, but it guarantees
- * that the dquot returned is the one that should go in the inode.
- */
- *IO_idqpp = dqp;
- xfs_dqunlock(dqp);
- return 0;
-}
-
-
-/*
- * Given a udquot and gdquot, attach a ptr to the group dquot in the
- * udquot as a hint for future lookups. The idea sounds simple, but the
- * execution isn't, because the udquot might have a group dquot attached
- * already and getting rid of that gets us into lock ordering constraints.
- * The process is complicated more by the fact that the dquots may or may not
- * be locked on entry.
- */
-STATIC void
-xfs_qm_dqattach_grouphint(
- xfs_dquot_t *udq,
- xfs_dquot_t *gdq)
-{
- xfs_dquot_t *tmp;
-
- xfs_dqlock(udq);
-
- if ((tmp = udq->q_gdquot)) {
- if (tmp == gdq) {
- xfs_dqunlock(udq);
- return;
- }
-
- udq->q_gdquot = NULL;
- /*
- * We can't keep any dqlocks when calling dqrele,
- * because the freelist lock comes before dqlocks.
- */
- xfs_dqunlock(udq);
- /*
- * we took a hard reference once upon a time in dqget,
- * so give it back when the udquot no longer points at it
- * dqput() does the unlocking of the dquot.
- */
- xfs_qm_dqrele(tmp);
-
- xfs_dqlock(udq);
- xfs_dqlock(gdq);
-
- } else {
- ASSERT(XFS_DQ_IS_LOCKED(udq));
- xfs_dqlock(gdq);
- }
-
- ASSERT(XFS_DQ_IS_LOCKED(udq));
- ASSERT(XFS_DQ_IS_LOCKED(gdq));
- /*
- * Somebody could have attached a gdquot here,
- * when we dropped the uqlock. If so, just do nothing.
- */
- if (udq->q_gdquot == NULL) {
- XFS_DQHOLD(gdq);
- udq->q_gdquot = gdq;
- }
-
- xfs_dqunlock(gdq);
- xfs_dqunlock(udq);
-}
-
-
-/*
- * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
- * into account.
- * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
- * Inode may get unlocked and relocked in here, and the caller must deal with
- * the consequences.
- */
-int
-xfs_qm_dqattach_locked(
- xfs_inode_t *ip,
- uint flags)
-{
- xfs_mount_t *mp = ip->i_mount;
- uint nquotas = 0;
- int error = 0;
-
- if (!XFS_IS_QUOTA_RUNNING(mp) ||
- !XFS_IS_QUOTA_ON(mp) ||
- !XFS_NOT_DQATTACHED(mp, ip) ||
- ip->i_ino == mp->m_sb.sb_uquotino ||
- ip->i_ino == mp->m_sb.sb_gquotino)
- return 0;
-
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
-
- if (XFS_IS_UQUOTA_ON(mp)) {
- error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
- flags & XFS_QMOPT_DQALLOC,
- NULL, &ip->i_udquot);
- if (error)
- goto done;
- nquotas++;
- }
-
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
- if (XFS_IS_OQUOTA_ON(mp)) {
- error = XFS_IS_GQUOTA_ON(mp) ?
- xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
- flags & XFS_QMOPT_DQALLOC,
- ip->i_udquot, &ip->i_gdquot) :
- xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
- flags & XFS_QMOPT_DQALLOC,
- ip->i_udquot, &ip->i_gdquot);
- /*
- * Don't worry about the udquot that we may have
- * attached above. It'll get detached, if not already.
- */
- if (error)
- goto done;
- nquotas++;
- }
-
- /*
- * Attach this group quota to the user quota as a hint.
- * This WON'T, in general, result in a thrash.
- */
- if (nquotas == 2) {
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
- ASSERT(ip->i_udquot);
- ASSERT(ip->i_gdquot);
-
- /*
- * We may or may not have the i_udquot locked at this point,
- * but this check is OK since we don't depend on the i_gdquot to
- * be accurate 100% all the time. It is just a hint, and this
- * will succeed in general.
- */
- if (ip->i_udquot->q_gdquot == ip->i_gdquot)
- goto done;
- /*
- * Attach i_gdquot to the gdquot hint inside the i_udquot.
- */
- xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot);
- }
-
- done:
-#ifdef QUOTADEBUG
- if (! error) {
- if (XFS_IS_UQUOTA_ON(mp))
- ASSERT(ip->i_udquot);
- if (XFS_IS_OQUOTA_ON(mp))
- ASSERT(ip->i_gdquot);
- }
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
-#endif
- return error;
-}
-
-int
-xfs_qm_dqattach(
- struct xfs_inode *ip,
- uint flags)
-{
- int error;
-
- xfs_ilock(ip, XFS_ILOCK_EXCL);
- error = xfs_qm_dqattach_locked(ip, flags);
- xfs_iunlock(ip, XFS_ILOCK_EXCL);
-
- return error;
-}
-
-/*
- * Release dquots (and their references) if any.
- * The inode should be locked EXCL except when this's called by
- * xfs_ireclaim.
- */
-void
-xfs_qm_dqdetach(
- xfs_inode_t *ip)
-{
- if (!(ip->i_udquot || ip->i_gdquot))
- return;
-
- trace_xfs_dquot_dqdetach(ip);
-
- ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
- ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
- if (ip->i_udquot) {
- xfs_qm_dqrele(ip->i_udquot);
- ip->i_udquot = NULL;
- }
- if (ip->i_gdquot) {
- xfs_qm_dqrele(ip->i_gdquot);
- ip->i_gdquot = NULL;
- }
-}
-
-int
-xfs_qm_sync(
- struct xfs_mount *mp,
- int flags)
-{
- struct xfs_quotainfo *q = mp->m_quotainfo;
- int recl, restarts;
- struct xfs_dquot *dqp;
- int error;
-
- if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
- return 0;
-
- restarts = 0;
-
- again:
- mutex_lock(&q->qi_dqlist_lock);
- /*
- * dqpurge_all() also takes the mplist lock and iterate thru all dquots
- * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared
- * when we have the mplist lock, we know that dquots will be consistent
- * as long as we have it locked.
- */
- if (!XFS_IS_QUOTA_ON(mp)) {
- mutex_unlock(&q->qi_dqlist_lock);
- return 0;
- }
- ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
- list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
- /*
- * If this is vfs_sync calling, then skip the dquots that
- * don't 'seem' to be dirty. ie. don't acquire dqlock.
- * This is very similar to what xfs_sync does with inodes.
- */
- if (flags & SYNC_TRYLOCK) {
- if (!XFS_DQ_IS_DIRTY(dqp))
- continue;
- if (!xfs_qm_dqlock_nowait(dqp))
- continue;
- } else {
- xfs_dqlock(dqp);
- }
-
- /*
- * Now, find out for sure if this dquot is dirty or not.
- */
- if (! XFS_DQ_IS_DIRTY(dqp)) {
- xfs_dqunlock(dqp);
- continue;
- }
-
- /* XXX a sentinel would be better */
- recl = q->qi_dqreclaims;
- if (!xfs_dqflock_nowait(dqp)) {
- if (flags & SYNC_TRYLOCK) {
- xfs_dqunlock(dqp);
- continue;
- }
- /*
- * If we can't grab the flush lock then if the caller
- * really wanted us to give this our best shot, so
- * see if we can give a push to the buffer before we wait
- * on the flush lock. At this point, we know that
- * even though the dquot is being flushed,
- * it has (new) dirty data.
- */
- xfs_qm_dqflock_pushbuf_wait(dqp);
- }
- /*
- * Let go of the mplist lock. We don't want to hold it
- * across a disk write
- */
- mutex_unlock(&q->qi_dqlist_lock);
- error = xfs_qm_dqflush(dqp, flags);
- xfs_dqunlock(dqp);
- if (error && XFS_FORCED_SHUTDOWN(mp))
- return 0; /* Need to prevent umount failure */
- else if (error)
- return error;
-
- mutex_lock(&q->qi_dqlist_lock);
- if (recl != q->qi_dqreclaims) {
- if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS)
- break;
-
- mutex_unlock(&q->qi_dqlist_lock);
- goto again;
- }
- }
-
- mutex_unlock(&q->qi_dqlist_lock);
- return 0;
-}
-
-/*
- * The hash chains and the mplist use the same xfs_dqhash structure as
- * their list head, but we can take the mplist qh_lock and one of the
- * hash qh_locks at the same time without any problem as they aren't
- * related.
- */
-static struct lock_class_key xfs_quota_mplist_class;
-
-/*
- * This initializes all the quota information that's kept in the
- * mount structure
- */
-STATIC int
-xfs_qm_init_quotainfo(
- xfs_mount_t *mp)
-{
- xfs_quotainfo_t *qinf;
- int error;
- xfs_dquot_t *dqp;
-
- ASSERT(XFS_IS_QUOTA_RUNNING(mp));
-
- /*
- * Tell XQM that we exist as soon as possible.
- */
- if ((error = xfs_qm_hold_quotafs_ref(mp))) {
- return error;
- }
-
- qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
-
- /*
- * See if quotainodes are setup, and if not, allocate them,
- * and change the superblock accordingly.
- */
- if ((error = xfs_qm_init_quotainos(mp))) {
- kmem_free(qinf);
- mp->m_quotainfo = NULL;
- return error;
- }
-
- INIT_LIST_HEAD(&qinf->qi_dqlist);
- mutex_init(&qinf->qi_dqlist_lock);
- lockdep_set_class(&qinf->qi_dqlist_lock, &xfs_quota_mplist_class);
-
- qinf->qi_dqreclaims = 0;
-
- /* mutex used to serialize quotaoffs */
- mutex_init(&qinf->qi_quotaofflock);
-
- /* Precalc some constants */
- qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
- ASSERT(qinf->qi_dqchunklen);
- qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen);
- do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t));
-
- mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
-
- /*
- * We try to get the limits from the superuser's limits fields.
- * This is quite hacky, but it is standard quota practice.
- * We look at the USR dquot with id == 0 first, but if user quotas
- * are not enabled we goto the GRP dquot with id == 0.
- * We don't really care to keep separate default limits for user
- * and group quotas, at least not at this point.
- */
- error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0,
- XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
- (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
- XFS_DQ_PROJ),
- XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN,
- &dqp);
- if (! error) {
- xfs_disk_dquot_t *ddqp = &dqp->q_core;
-
- /*
- * The warnings and timers set the grace period given to
- * a user or group before he or she can not perform any
- * more writing. If it is zero, a default is used.
- */
- qinf->qi_btimelimit = ddqp->d_btimer ?
- be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
- qinf->qi_itimelimit = ddqp->d_itimer ?
- be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
- qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
- be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
- qinf->qi_bwarnlimit = ddqp->d_bwarns ?
- be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
- qinf->qi_iwarnlimit = ddqp->d_iwarns ?
- be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
- qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
- be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
- qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
- qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
- qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
- qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
- qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
- qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
-
- /*
- * We sent the XFS_QMOPT_DQSUSER flag to dqget because
- * we don't want this dquot cached. We haven't done a
- * quotacheck yet, and quotacheck doesn't like incore dquots.
- */
- xfs_qm_dqdestroy(dqp);
- } else {
- qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
- qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
- qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
- qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
- qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
- qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
- }
-
- return 0;
-}
-
-
-/*
- * Gets called when unmounting a filesystem or when all quotas get
- * turned off.
- * This purges the quota inodes, destroys locks and frees itself.
- */
-void
-xfs_qm_destroy_quotainfo(
- xfs_mount_t *mp)
-{
- xfs_quotainfo_t *qi;
-
- qi = mp->m_quotainfo;
- ASSERT(qi != NULL);
- ASSERT(xfs_Gqm != NULL);
-
- /*
- * Release the reference that XQM kept, so that we know
- * when the XQM structure should be freed. We cannot assume
- * that xfs_Gqm is non-null after this point.
- */
- xfs_qm_rele_quotafs_ref(mp);
-
- ASSERT(list_empty(&qi->qi_dqlist));
- mutex_destroy(&qi->qi_dqlist_lock);
-
- if (qi->qi_uquotaip) {
- IRELE(qi->qi_uquotaip);
- qi->qi_uquotaip = NULL; /* paranoia */
- }
- if (qi->qi_gquotaip) {
- IRELE(qi->qi_gquotaip);
- qi->qi_gquotaip = NULL;
- }
- mutex_destroy(&qi->qi_quotaofflock);
- kmem_free(qi);
- mp->m_quotainfo = NULL;
-}
-
-
-
-/* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */
-
-/* ARGSUSED */
-STATIC void
-xfs_qm_list_init(
- xfs_dqlist_t *list,
- char *str,
- int n)
-{
- mutex_init(&list->qh_lock);
- INIT_LIST_HEAD(&list->qh_list);
- list->qh_version = 0;
- list->qh_nelems = 0;
-}
-
-STATIC void
-xfs_qm_list_destroy(
- xfs_dqlist_t *list)
-{
- mutex_destroy(&(list->qh_lock));
-}
-
-/*
- * Create an inode and return with a reference already taken, but unlocked
- * This is how we create quota inodes
- */
-STATIC int
-xfs_qm_qino_alloc(
- xfs_mount_t *mp,
- xfs_inode_t **ip,
- __int64_t sbfields,
- uint flags)
-{
- xfs_trans_t *tp;
- int error;
- int committed;
-
- tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
- if ((error = xfs_trans_reserve(tp,
- XFS_QM_QINOCREATE_SPACE_RES(mp),
- XFS_CREATE_LOG_RES(mp), 0,
- XFS_TRANS_PERM_LOG_RES,
- XFS_CREATE_LOG_COUNT))) {
- xfs_trans_cancel(tp, 0);
- return error;
- }
-
- error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip, &committed);
- if (error) {
- xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
- XFS_TRANS_ABORT);
- return error;
- }
-
- /*
- * Make the changes in the superblock, and log those too.
- * sbfields arg may contain fields other than *QUOTINO;
- * VERSIONNUM for example.
- */
- spin_lock(&mp->m_sb_lock);
- if (flags & XFS_QMOPT_SBVERSION) {
- ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
- ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
- XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
- (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
- XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
-
- xfs_sb_version_addquota(&mp->m_sb);
- mp->m_sb.sb_uquotino = NULLFSINO;
- mp->m_sb.sb_gquotino = NULLFSINO;
-
- /* qflags will get updated _after_ quotacheck */
- mp->m_sb.sb_qflags = 0;
- }
- if (flags & XFS_QMOPT_UQUOTA)
- mp->m_sb.sb_uquotino = (*ip)->i_ino;
- else
- mp->m_sb.sb_gquotino = (*ip)->i_ino;
- spin_unlock(&mp->m_sb_lock);
- xfs_mod_sb(tp, sbfields);
-
- if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
- xfs_alert(mp, "%s failed (error %d)!", __func__, error);
- return error;
- }
- return 0;
-}
-
-
-STATIC void
-xfs_qm_reset_dqcounts(
- xfs_mount_t *mp,
- xfs_buf_t *bp,
- xfs_dqid_t id,
- uint type)
-{
- xfs_disk_dquot_t *ddq;
- int j;
-
- trace_xfs_reset_dqcounts(bp, _RET_IP_);
-
- /*
- * Reset all counters and timers. They'll be
- * started afresh by xfs_qm_quotacheck.
- */
-#ifdef DEBUG
- j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
- do_div(j, sizeof(xfs_dqblk_t));
- ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
-#endif
- ddq = (xfs_disk_dquot_t *)XFS_BUF_PTR(bp);
- for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
- /*
- * Do a sanity check, and if needed, repair the dqblk. Don't
- * output any warnings because it's perfectly possible to
- * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
- */
- (void) xfs_qm_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
- "xfs_quotacheck");
- ddq->d_bcount = 0;
- ddq->d_icount = 0;
- ddq->d_rtbcount = 0;
- ddq->d_btimer = 0;
- ddq->d_itimer = 0;
- ddq->d_rtbtimer = 0;
- ddq->d_bwarns = 0;
- ddq->d_iwarns = 0;
- ddq->d_rtbwarns = 0;
- ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
- }
-}
-
-STATIC int
-xfs_qm_dqiter_bufs(
- xfs_mount_t *mp,
- xfs_dqid_t firstid,
- xfs_fsblock_t bno,
- xfs_filblks_t blkcnt,
- uint flags)
-{
- xfs_buf_t *bp;
- int error;
- int type;
-
- ASSERT(blkcnt > 0);
- type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
- (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
- error = 0;
-
- /*
- * Blkcnt arg can be a very big number, and might even be
- * larger than the log itself. So, we have to break it up into
- * manageable-sized transactions.
- * Note that we don't start a permanent transaction here; we might
- * not be able to get a log reservation for the whole thing up front,
- * and we don't really care to either, because we just discard
- * everything if we were to crash in the middle of this loop.
- */
- while (blkcnt--) {
- error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
- XFS_FSB_TO_DADDR(mp, bno),
- mp->m_quotainfo->qi_dqchunklen, 0, &bp);
- if (error)
- break;
-
- xfs_qm_reset_dqcounts(mp, bp, firstid, type);
- xfs_bdwrite(mp, bp);
- /*
- * goto the next block.
- */
- bno++;
- firstid += mp->m_quotainfo->qi_dqperchunk;
- }
- return error;
-}
-
-/*
- * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
- * caller supplied function for every chunk of dquots that we find.
- */
-STATIC int
-xfs_qm_dqiterate(
- xfs_mount_t *mp,
- xfs_inode_t *qip,
- uint flags)
-{
- xfs_bmbt_irec_t *map;
- int i, nmaps; /* number of map entries */
- int error; /* return value */
- xfs_fileoff_t lblkno;
- xfs_filblks_t maxlblkcnt;
- xfs_dqid_t firstid;
- xfs_fsblock_t rablkno;
- xfs_filblks_t rablkcnt;
-
- error = 0;
- /*
- * This looks racy, but we can't keep an inode lock across a
- * trans_reserve. But, this gets called during quotacheck, and that
- * happens only at mount time which is single threaded.
- */
- if (qip->i_d.di_nblocks == 0)
- return 0;
-
- map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
-
- lblkno = 0;
- maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
- do {
- nmaps = XFS_DQITER_MAP_SIZE;
- /*
- * We aren't changing the inode itself. Just changing
- * some of its data. No new blocks are added here, and
- * the inode is never added to the transaction.
- */
- xfs_ilock(qip, XFS_ILOCK_SHARED);
- error = xfs_bmapi(NULL, qip, lblkno,
- maxlblkcnt - lblkno,
- XFS_BMAPI_METADATA,
- NULL,
- 0, map, &nmaps, NULL);
- xfs_iunlock(qip, XFS_ILOCK_SHARED);
- if (error)
- break;
-
- ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
- for (i = 0; i < nmaps; i++) {
- ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
- ASSERT(map[i].br_blockcount);
-
-
- lblkno += map[i].br_blockcount;
-
- if (map[i].br_startblock == HOLESTARTBLOCK)
- continue;
-
- firstid = (xfs_dqid_t) map[i].br_startoff *
- mp->m_quotainfo->qi_dqperchunk;
- /*
- * Do a read-ahead on the next extent.
- */
- if ((i+1 < nmaps) &&
- (map[i+1].br_startblock != HOLESTARTBLOCK)) {
- rablkcnt = map[i+1].br_blockcount;
- rablkno = map[i+1].br_startblock;
- while (rablkcnt--) {
- xfs_buf_readahead(mp->m_ddev_targp,
- XFS_FSB_TO_DADDR(mp, rablkno),
- mp->m_quotainfo->qi_dqchunklen);
- rablkno++;
- }
- }
- /*
- * Iterate thru all the blks in the extent and
- * reset the counters of all the dquots inside them.
- */
- if ((error = xfs_qm_dqiter_bufs(mp,
- firstid,
- map[i].br_startblock,
- map[i].br_blockcount,
- flags))) {
- break;
- }
- }
-
- if (error)
- break;
- } while (nmaps > 0);
-
- kmem_free(map);
-
- return error;
-}
-
-/*
- * Called by dqusage_adjust in doing a quotacheck.
- *
- * Given the inode, and a dquot id this updates both the incore dqout as well
- * as the buffer copy. This is so that once the quotacheck is done, we can
- * just log all the buffers, as opposed to logging numerous updates to
- * individual dquots.
- */
-STATIC int
-xfs_qm_quotacheck_dqadjust(
- struct xfs_inode *ip,
- xfs_dqid_t id,
- uint type,
- xfs_qcnt_t nblks,
- xfs_qcnt_t rtblks)
-{
- struct xfs_mount *mp = ip->i_mount;
- struct xfs_dquot *dqp;
- int error;
-
- error = xfs_qm_dqget(mp, ip, id, type,
- XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
- if (error) {
- /*
- * Shouldn't be able to turn off quotas here.
- */
- ASSERT(error != ESRCH);
- ASSERT(error != ENOENT);
- return error;
- }
-
- trace_xfs_dqadjust(dqp);
-
- /*
- * Adjust the inode count and the block count to reflect this inode's
- * resource usage.
- */
- be64_add_cpu(&dqp->q_core.d_icount, 1);
- dqp->q_res_icount++;
- if (nblks) {
- be64_add_cpu(&dqp->q_core.d_bcount, nblks);
- dqp->q_res_bcount += nblks;
- }
- if (rtblks) {
- be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
- dqp->q_res_rtbcount += rtblks;
- }
-
- /*
- * Set default limits, adjust timers (since we changed usages)
- *
- * There are no timers for the default values set in the root dquot.
- */
- if (dqp->q_core.d_id) {
- xfs_qm_adjust_dqlimits(mp, &dqp->q_core);
- xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
- }
-
- dqp->dq_flags |= XFS_DQ_DIRTY;
- xfs_qm_dqput(dqp);
- return 0;
-}
-
-STATIC int
-xfs_qm_get_rtblks(
- xfs_inode_t *ip,
- xfs_qcnt_t *O_rtblks)
-{
- xfs_filblks_t rtblks; /* total rt blks */
- xfs_extnum_t idx; /* extent record index */
- xfs_ifork_t *ifp; /* inode fork pointer */
- xfs_extnum_t nextents; /* number of extent entries */
- int error;
-
- ASSERT(XFS_IS_REALTIME_INODE(ip));
- ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
- if (!(ifp->if_flags & XFS_IFEXTENTS)) {
- if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
- return error;
- }
- rtblks = 0;
- nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
- for (idx = 0; idx < nextents; idx++)
- rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
- *O_rtblks = (xfs_qcnt_t)rtblks;
- return 0;
-}
-
-/*
- * callback routine supplied to bulkstat(). Given an inumber, find its
- * dquots and update them to account for resources taken by that inode.
- */
-/* ARGSUSED */
-STATIC int
-xfs_qm_dqusage_adjust(
- xfs_mount_t *mp, /* mount point for filesystem */
- xfs_ino_t ino, /* inode number to get data for */
- void __user *buffer, /* not used */
- int ubsize, /* not used */
- int *ubused, /* not used */
- int *res) /* result code value */
-{
- xfs_inode_t *ip;
- xfs_qcnt_t nblks, rtblks = 0;
- int error;
-
- ASSERT(XFS_IS_QUOTA_RUNNING(mp));
-
- /*
- * rootino must have its resources accounted for, not so with the quota
- * inodes.
- */
- if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
- *res = BULKSTAT_RV_NOTHING;
- return XFS_ERROR(EINVAL);
- }
-
- /*
- * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
- * interface expects the inode to be exclusively locked because that's
- * the case in all other instances. It's OK that we do this because
- * quotacheck is done only at mount time.
- */
- error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
- if (error) {
- *res = BULKSTAT_RV_NOTHING;
- return error;
- }
-
- ASSERT(ip->i_delayed_blks == 0);
-
- if (XFS_IS_REALTIME_INODE(ip)) {
- /*
- * Walk thru the extent list and count the realtime blocks.
- */
- error = xfs_qm_get_rtblks(ip, &rtblks);
- if (error)
- goto error0;
- }
-
- nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
-
- /*
- * Add the (disk blocks and inode) resources occupied by this
- * inode to its dquots. We do this adjustment in the incore dquot,
- * and also copy the changes to its buffer.
- * We don't care about putting these changes in a transaction
- * envelope because if we crash in the middle of a 'quotacheck'
- * we have to start from the beginning anyway.
- * Once we're done, we'll log all the dquot bufs.
- *
- * The *QUOTA_ON checks below may look pretty racy, but quotachecks
- * and quotaoffs don't race. (Quotachecks happen at mount time only).
- */
- if (XFS_IS_UQUOTA_ON(mp)) {
- error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
- XFS_DQ_USER, nblks, rtblks);
- if (error)
- goto error0;
- }
-
- if (XFS_IS_GQUOTA_ON(mp)) {
- error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
- XFS_DQ_GROUP, nblks, rtblks);
- if (error)
- goto error0;
- }
-
- if (XFS_IS_PQUOTA_ON(mp)) {
- error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
- XFS_DQ_PROJ, nblks, rtblks);
- if (error)
- goto error0;
- }
-
- xfs_iunlock(ip, XFS_ILOCK_EXCL);
- IRELE(ip);
- *res = BULKSTAT_RV_DIDONE;
- return 0;
-
-error0:
- xfs_iunlock(ip, XFS_ILOCK_EXCL);
- IRELE(ip);
- *res = BULKSTAT_RV_GIVEUP;
- return error;
-}
-
-/*
- * Walk thru all the filesystem inodes and construct a consistent view
- * of the disk quota world. If the quotacheck fails, disable quotas.
- */
-int
-xfs_qm_quotacheck(
- xfs_mount_t *mp)
-{
- int done, count, error;
- xfs_ino_t lastino;
- size_t structsz;
- xfs_inode_t *uip, *gip;
- uint flags;
-
- count = INT_MAX;
- structsz = 1;
- lastino = 0;
- flags = 0;
-
- ASSERT(mp->m_quotainfo->qi_uquotaip || mp->m_quotainfo->qi_gquotaip);
- ASSERT(XFS_IS_QUOTA_RUNNING(mp));
-
- /*
- * There should be no cached dquots. The (simplistic) quotacheck
- * algorithm doesn't like that.
- */
- ASSERT(list_empty(&mp->m_quotainfo->qi_dqlist));
-
- xfs_notice(mp, "Quotacheck needed: Please wait.");
-
- /*
- * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
- * their counters to zero. We need a clean slate.
- * We don't log our changes till later.
- */
- uip = mp->m_quotainfo->qi_uquotaip;
- if (uip) {
- error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA);
- if (error)
- goto error_return;
- flags |= XFS_UQUOTA_CHKD;
- }
-
- gip = mp->m_quotainfo->qi_gquotaip;
- if (gip) {
- error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
- XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
- if (error)
- goto error_return;
- flags |= XFS_OQUOTA_CHKD;
- }
-
- do {
- /*
- * Iterate thru all the inodes in the file system,
- * adjusting the corresponding dquot counters in core.
- */
- error = xfs_bulkstat(mp, &lastino, &count,
- xfs_qm_dqusage_adjust,
- structsz, NULL, &done);
- if (error)
- break;
-
- } while (!done);
-
- /*
- * We've made all the changes that we need to make incore.
- * Flush them down to disk buffers if everything was updated
- * successfully.
- */
- if (!error)
- error = xfs_qm_dqflush_all(mp, 0);
-
- /*
- * We can get this error if we couldn't do a dquot allocation inside
- * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
- * dirty dquots that might be cached, we just want to get rid of them
- * and turn quotaoff. The dquots won't be attached to any of the inodes
- * at this point (because we intentionally didn't in dqget_noattach).
- */
- if (error) {
- xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
- goto error_return;
- }
-
- /*
- * We didn't log anything, because if we crashed, we'll have to
- * start the quotacheck from scratch anyway. However, we must make
- * sure that our dquot changes are secure before we put the
- * quotacheck'd stamp on the superblock. So, here we do a synchronous
- * flush.
- */
- XFS_bflush(mp->m_ddev_targp);
-
- /*
- * If one type of quotas is off, then it will lose its
- * quotachecked status, since we won't be doing accounting for
- * that type anymore.
- */
- mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD);
- mp->m_qflags |= flags;
-
- xfs_qm_dquot_list_print(mp);
-
- error_return:
- if (error) {
- xfs_warn(mp,
- "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
- error);
- /*
- * We must turn off quotas.
- */
- ASSERT(mp->m_quotainfo != NULL);
- ASSERT(xfs_Gqm != NULL);
- xfs_qm_destroy_quotainfo(mp);
- if (xfs_mount_reset_sbqflags(mp)) {
- xfs_warn(mp,
- "Quotacheck: Failed to reset quota flags.");
- }
- } else
- xfs_notice(mp, "Quotacheck: Done.");
- return (error);
-}
-
-/*
- * This is called after the superblock has been read in and we're ready to
- * iget the quota inodes.
- */
-STATIC int
-xfs_qm_init_quotainos(
- xfs_mount_t *mp)
-{
- xfs_inode_t *uip, *gip;
- int error;
- __int64_t sbflags;
- uint flags;
-
- ASSERT(mp->m_quotainfo);
- uip = gip = NULL;
- sbflags = 0;
- flags = 0;
-
- /*
- * Get the uquota and gquota inodes
- */
- if (xfs_sb_version_hasquota(&mp->m_sb)) {
- if (XFS_IS_UQUOTA_ON(mp) &&
- mp->m_sb.sb_uquotino != NULLFSINO) {
- ASSERT(mp->m_sb.sb_uquotino > 0);
- if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
- 0, 0, &uip)))
- return XFS_ERROR(error);
- }
- if (XFS_IS_OQUOTA_ON(mp) &&
- mp->m_sb.sb_gquotino != NULLFSINO) {
- ASSERT(mp->m_sb.sb_gquotino > 0);
- if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
- 0, 0, &gip))) {
- if (uip)
- IRELE(uip);
- return XFS_ERROR(error);
- }
- }
- } else {
- flags |= XFS_QMOPT_SBVERSION;
- sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
- XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
- }
-
- /*
- * Create the two inodes, if they don't exist already. The changes
- * made above will get added to a transaction and logged in one of
- * the qino_alloc calls below. If the device is readonly,
- * temporarily switch to read-write to do this.
- */
- if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
- if ((error = xfs_qm_qino_alloc(mp, &uip,
- sbflags | XFS_SB_UQUOTINO,
- flags | XFS_QMOPT_UQUOTA)))
- return XFS_ERROR(error);
-
- flags &= ~XFS_QMOPT_SBVERSION;
- }
- if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
- flags |= (XFS_IS_GQUOTA_ON(mp) ?
- XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
- error = xfs_qm_qino_alloc(mp, &gip,
- sbflags | XFS_SB_GQUOTINO, flags);
- if (error) {
- if (uip)
- IRELE(uip);
-
- return XFS_ERROR(error);
- }
- }
-
- mp->m_quotainfo->qi_uquotaip = uip;
- mp->m_quotainfo->qi_gquotaip = gip;
-
- return 0;
-}
-
-
-
-/*
- * Just pop the least recently used dquot off the freelist and
- * recycle it. The returned dquot is locked.
- */
-STATIC xfs_dquot_t *
-xfs_qm_dqreclaim_one(void)
-{
- xfs_dquot_t *dqpout;
- xfs_dquot_t *dqp;
- int restarts;
- int startagain;
-
- restarts = 0;
- dqpout = NULL;
-
- /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */
-again:
- startagain = 0;
- mutex_lock(&xfs_Gqm->qm_dqfrlist_lock);
-
- list_for_each_entry(dqp, &xfs_Gqm->qm_dqfrlist, q_freelist) {
- struct xfs_mount *mp = dqp->q_mount;
- xfs_dqlock(dqp);
-
- /*
- * We are racing with dqlookup here. Naturally we don't
- * want to reclaim a dquot that lookup wants. We release the
- * freelist lock and start over, so that lookup will grab
- * both the dquot and the freelistlock.
- */
- if (dqp->dq_flags & XFS_DQ_WANT) {
- ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE));
-
- trace_xfs_dqreclaim_want(dqp);
- XQM_STATS_INC(xqmstats.xs_qm_dqwants);
- restarts++;
- startagain = 1;
- goto dqunlock;
- }
-
- /*
- * If the dquot is inactive, we are assured that it is
- * not on the mplist or the hashlist, and that makes our
- * life easier.
- */
- if (dqp->dq_flags & XFS_DQ_INACTIVE) {
- ASSERT(mp == NULL);
- ASSERT(! XFS_DQ_IS_DIRTY(dqp));
- ASSERT(list_empty(&dqp->q_hashlist));
- ASSERT(list_empty(&dqp->q_mplist));
- list_del_init(&dqp->q_freelist);
- xfs_Gqm->qm_dqfrlist_cnt--;
- dqpout = dqp;
- XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
- goto dqunlock;
- }
-
- ASSERT(dqp->q_hash);
- ASSERT(!list_empty(&dqp->q_mplist));
-
- /*
- * Try to grab the flush lock. If this dquot is in the process
- * of getting flushed to disk, we don't want to reclaim it.
- */
- if (!xfs_dqflock_nowait(dqp))
- goto dqunlock;
-
- /*
- * We have the flush lock so we know that this is not in the
- * process of being flushed. So, if this is dirty, flush it
- * DELWRI so that we don't get a freelist infested with
- * dirty dquots.
- */
- if (XFS_DQ_IS_DIRTY(dqp)) {
- int error;
-
- trace_xfs_dqreclaim_dirty(dqp);
-
- /*
- * We flush it delayed write, so don't bother
- * releasing the freelist lock.
- */
- error = xfs_qm_dqflush(dqp, 0);
- if (error) {
- xfs_warn(mp, "%s: dquot %p flush failed",
- __func__, dqp);
- }
- goto dqunlock;
- }
-
- /*
- * We're trying to get the hashlock out of order. This races
- * with dqlookup; so, we giveup and goto the next dquot if
- * we couldn't get the hashlock. This way, we won't starve
- * a dqlookup process that holds the hashlock that is
- * waiting for the freelist lock.
- */
- if (!mutex_trylock(&dqp->q_hash->qh_lock)) {
- restarts++;
- goto dqfunlock;
- }
-
- /*
- * This races with dquot allocation code as well as dqflush_all
- * and reclaim code. So, if we failed to grab the mplist lock,
- * giveup everything and start over.
- */
- if (!mutex_trylock(&mp->m_quotainfo->qi_dqlist_lock)) {
- restarts++;
- startagain = 1;
- goto qhunlock;
- }
-
- ASSERT(dqp->q_nrefs == 0);
- list_del_init(&dqp->q_mplist);
- mp->m_quotainfo->qi_dquots--;
- mp->m_quotainfo->qi_dqreclaims++;
- list_del_init(&dqp->q_hashlist);
- dqp->q_hash->qh_version++;
- list_del_init(&dqp->q_freelist);
- xfs_Gqm->qm_dqfrlist_cnt--;
- dqpout = dqp;
- mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
-qhunlock:
- mutex_unlock(&dqp->q_hash->qh_lock);
-dqfunlock:
- xfs_dqfunlock(dqp);
-dqunlock:
- xfs_dqunlock(dqp);
- if (dqpout)
- break;
- if (restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
- break;
- if (startagain) {
- mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
- goto again;
- }
- }
- mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
- return dqpout;
-}
-
-/*
- * Traverse the freelist of dquots and attempt to reclaim a maximum of
- * 'howmany' dquots. This operation races with dqlookup(), and attempts to
- * favor the lookup function ...
- */
-STATIC int
-xfs_qm_shake_freelist(
- int howmany)
-{
- int nreclaimed = 0;
- xfs_dquot_t *dqp;
-
- if (howmany <= 0)
- return 0;
-
- while (nreclaimed < howmany) {
- dqp = xfs_qm_dqreclaim_one();
- if (!dqp)
- return nreclaimed;
- xfs_qm_dqdestroy(dqp);
- nreclaimed++;
- }
- return nreclaimed;
-}
-
-/*
- * The kmem_shake interface is invoked when memory is running low.
- */
-/* ARGSUSED */
-STATIC int
-xfs_qm_shake(
- struct shrinker *shrink,
- struct shrink_control *sc)
-{
- int ndqused, nfree, n;
- gfp_t gfp_mask = sc->gfp_mask;
-
- if (!kmem_shake_allow(gfp_mask))
- return 0;
- if (!xfs_Gqm)
- return 0;
-
- nfree = xfs_Gqm->qm_dqfrlist_cnt; /* free dquots */
- /* incore dquots in all f/s's */
- ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree;
-
- ASSERT(ndqused >= 0);
-
- if (nfree <= ndqused && nfree < ndquot)
- return 0;
-
- ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */
- n = nfree - ndqused - ndquot; /* # over target */
-
- return xfs_qm_shake_freelist(MAX(nfree, n));
-}
-
-
-/*------------------------------------------------------------------*/
-
-/*
- * Return a new incore dquot. Depending on the number of
- * dquots in the system, we either allocate a new one on the kernel heap,
- * or reclaim a free one.
- * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed
- * to reclaim an existing one from the freelist.
- */
-boolean_t
-xfs_qm_dqalloc_incore(
- xfs_dquot_t **O_dqpp)
-{
- xfs_dquot_t *dqp;
-
- /*
- * Check against high water mark to see if we want to pop
- * a nincompoop dquot off the freelist.
- */
- if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) {
- /*
- * Try to recycle a dquot from the freelist.
- */
- if ((dqp = xfs_qm_dqreclaim_one())) {
- XQM_STATS_INC(xqmstats.xs_qm_dqreclaims);
- /*
- * Just zero the core here. The rest will get
- * reinitialized by caller. XXX we shouldn't even
- * do this zero ...
- */
- memset(&dqp->q_core, 0, sizeof(dqp->q_core));
- *O_dqpp = dqp;
- return B_FALSE;
- }
- XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses);
- }
-
- /*
- * Allocate a brand new dquot on the kernel heap and return it
- * to the caller to initialize.
- */
- ASSERT(xfs_Gqm->qm_dqzone != NULL);
- *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP);
- atomic_inc(&xfs_Gqm->qm_totaldquots);
-
- return B_TRUE;
-}
-
-
-/*
- * Start a transaction and write the incore superblock changes to
- * disk. flags parameter indicates which fields have changed.
- */
-int
-xfs_qm_write_sb_changes(
- xfs_mount_t *mp,
- __int64_t flags)
-{
- xfs_trans_t *tp;
- int error;
-
-#ifdef QUOTADEBUG
- xfs_notice(mp, "Writing superblock quota changes");
-#endif
- tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
- if ((error = xfs_trans_reserve(tp, 0,
- mp->m_sb.sb_sectsize + 128, 0,
- 0,
- XFS_DEFAULT_LOG_COUNT))) {
- xfs_trans_cancel(tp, 0);
- return error;
- }
-
- xfs_mod_sb(tp, flags);
- error = xfs_trans_commit(tp, 0);
-
- return error;
-}
-
-
-/* --------------- utility functions for vnodeops ---------------- */
-
-
-/*
- * Given an inode, a uid, gid and prid make sure that we have
- * allocated relevant dquot(s) on disk, and that we won't exceed inode
- * quotas by creating this file.
- * This also attaches dquot(s) to the given inode after locking it,
- * and returns the dquots corresponding to the uid and/or gid.
- *
- * in : inode (unlocked)
- * out : udquot, gdquot with references taken and unlocked
- */
-int
-xfs_qm_vop_dqalloc(
- struct xfs_inode *ip,
- uid_t uid,
- gid_t gid,
- prid_t prid,
- uint flags,
- struct xfs_dquot **O_udqpp,
- struct xfs_dquot **O_gdqpp)
-{
- struct xfs_mount *mp = ip->i_mount;
- struct xfs_dquot *uq, *gq;
- int error;
- uint lockflags;
-
- if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
- return 0;
-
- lockflags = XFS_ILOCK_EXCL;
- xfs_ilock(ip, lockflags);
-
- if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
- gid = ip->i_d.di_gid;
-
- /*
- * Attach the dquot(s) to this inode, doing a dquot allocation
- * if necessary. The dquot(s) will not be locked.
- */
- if (XFS_NOT_DQATTACHED(mp, ip)) {
- error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
- if (error) {
- xfs_iunlock(ip, lockflags);
- return error;
- }
- }
-
- uq = gq = NULL;
- if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
- if (ip->i_d.di_uid != uid) {
- /*
- * What we need is the dquot that has this uid, and
- * if we send the inode to dqget, the uid of the inode
- * takes priority over what's sent in the uid argument.
- * We must unlock inode here before calling dqget if
- * we're not sending the inode, because otherwise
- * we'll deadlock by doing trans_reserve while
- * holding ilock.
- */
- xfs_iunlock(ip, lockflags);
- if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
- XFS_DQ_USER,
- XFS_QMOPT_DQALLOC |
- XFS_QMOPT_DOWARN,
- &uq))) {
- ASSERT(error != ENOENT);
- return error;
- }
- /*
- * Get the ilock in the right order.
- */
- xfs_dqunlock(uq);
- lockflags = XFS_ILOCK_SHARED;
- xfs_ilock(ip, lockflags);
- } else {
- /*
- * Take an extra reference, because we'll return
- * this to caller
- */
- ASSERT(ip->i_udquot);
- uq = ip->i_udquot;
- xfs_dqlock(uq);
- XFS_DQHOLD(uq);
- xfs_dqunlock(uq);
- }
- }
- if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
- if (ip->i_d.di_gid != gid) {
- xfs_iunlock(ip, lockflags);
- if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
- XFS_DQ_GROUP,
- XFS_QMOPT_DQALLOC |
- XFS_QMOPT_DOWARN,
- &gq))) {
- if (uq)
- xfs_qm_dqrele(uq);
- ASSERT(error != ENOENT);
- return error;
- }
- xfs_dqunlock(gq);
- lockflags = XFS_ILOCK_SHARED;
- xfs_ilock(ip, lockflags);
- } else {
- ASSERT(ip->i_gdquot);
- gq = ip->i_gdquot;
- xfs_dqlock(gq);
- XFS_DQHOLD(gq);
- xfs_dqunlock(gq);
- }
- } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
- if (xfs_get_projid(ip) != prid) {
- xfs_iunlock(ip, lockflags);
- if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
- XFS_DQ_PROJ,
- XFS_QMOPT_DQALLOC |
- XFS_QMOPT_DOWARN,
- &gq))) {
- if (uq)
- xfs_qm_dqrele(uq);
- ASSERT(error != ENOENT);
- return (error);
- }
- xfs_dqunlock(gq);
- lockflags = XFS_ILOCK_SHARED;
- xfs_ilock(ip, lockflags);
- } else {
- ASSERT(ip->i_gdquot);
- gq = ip->i_gdquot;
- xfs_dqlock(gq);
- XFS_DQHOLD(gq);
- xfs_dqunlock(gq);
- }
- }
- if (uq)
- trace_xfs_dquot_dqalloc(ip);
-
- xfs_iunlock(ip, lockflags);
- if (O_udqpp)
- *O_udqpp = uq;
- else if (uq)
- xfs_qm_dqrele(uq);
- if (O_gdqpp)
- *O_gdqpp = gq;
- else if (gq)
- xfs_qm_dqrele(gq);
- return 0;
-}
-
-/*
- * Actually transfer ownership, and do dquot modifications.
- * These were already reserved.
- */
-xfs_dquot_t *
-xfs_qm_vop_chown(
- xfs_trans_t *tp,
- xfs_inode_t *ip,
- xfs_dquot_t **IO_olddq,
- xfs_dquot_t *newdq)
-{
- xfs_dquot_t *prevdq;
- uint bfield = XFS_IS_REALTIME_INODE(ip) ?
- XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
-
-
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
- ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
-
- /* old dquot */
- prevdq = *IO_olddq;
- ASSERT(prevdq);
- ASSERT(prevdq != newdq);
-
- xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
- xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
-
- /* the sparkling new dquot */
- xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
- xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
-
- /*
- * Take an extra reference, because the inode
- * is going to keep this dquot pointer even
- * after the trans_commit.
- */
- xfs_dqlock(newdq);
- XFS_DQHOLD(newdq);
- xfs_dqunlock(newdq);
- *IO_olddq = newdq;
-
- return prevdq;
-}
-
-/*
- * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
- */
-int
-xfs_qm_vop_chown_reserve(
- xfs_trans_t *tp,
- xfs_inode_t *ip,
- xfs_dquot_t *udqp,
- xfs_dquot_t *gdqp,
- uint flags)
-{
- xfs_mount_t *mp = ip->i_mount;
- uint delblks, blkflags, prjflags = 0;
- xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
- int error;
-
-
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
- ASSERT(XFS_IS_QUOTA_RUNNING(mp));
-
- delblks = ip->i_delayed_blks;
- delblksudq = delblksgdq = unresudq = unresgdq = NULL;
- blkflags = XFS_IS_REALTIME_INODE(ip) ?
- XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
-
- if (XFS_IS_UQUOTA_ON(mp) && udqp &&
- ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
- delblksudq = udqp;
- /*
- * If there are delayed allocation blocks, then we have to
- * unreserve those from the old dquot, and add them to the
- * new dquot.
- */
- if (delblks) {
- ASSERT(ip->i_udquot);
- unresudq = ip->i_udquot;
- }
- }
- if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
- if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
- xfs_get_projid(ip) != be32_to_cpu(gdqp->q_core.d_id))
- prjflags = XFS_QMOPT_ENOSPC;
-
- if (prjflags ||
- (XFS_IS_GQUOTA_ON(ip->i_mount) &&
- ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
- delblksgdq = gdqp;
- if (delblks) {
- ASSERT(ip->i_gdquot);
- unresgdq = ip->i_gdquot;
- }
- }
- }
-
- if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
- delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
- flags | blkflags | prjflags)))
- return (error);
-
- /*
- * Do the delayed blks reservations/unreservations now. Since, these
- * are done without the help of a transaction, if a reservation fails
- * its previous reservations won't be automatically undone by trans
- * code. So, we have to do it manually here.
- */
- if (delblks) {
- /*
- * Do the reservations first. Unreservation can't fail.
- */
- ASSERT(delblksudq || delblksgdq);
- ASSERT(unresudq || unresgdq);
- if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
- delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
- flags | blkflags | prjflags)))
- return (error);
- xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
- unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
- blkflags);
- }
-
- return (0);
-}
-
-int
-xfs_qm_vop_rename_dqattach(
- struct xfs_inode **i_tab)
-{
- struct xfs_mount *mp = i_tab[0]->i_mount;
- int i;
-
- if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
- return 0;
-
- for (i = 0; (i < 4 && i_tab[i]); i++) {
- struct xfs_inode *ip = i_tab[i];
- int error;
-
- /*
- * Watch out for duplicate entries in the table.
- */
- if (i == 0 || ip != i_tab[i-1]) {
- if (XFS_NOT_DQATTACHED(mp, ip)) {
- error = xfs_qm_dqattach(ip, 0);
- if (error)
- return error;
- }
- }
- }
- return 0;
-}
-
-void
-xfs_qm_vop_create_dqattach(
- struct xfs_trans *tp,
- struct xfs_inode *ip,
- struct xfs_dquot *udqp,
- struct xfs_dquot *gdqp)
-{
- struct xfs_mount *mp = tp->t_mountp;
-
- if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
- return;
-
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
- ASSERT(XFS_IS_QUOTA_RUNNING(mp));
-
- if (udqp) {
- xfs_dqlock(udqp);
- XFS_DQHOLD(udqp);
- xfs_dqunlock(udqp);
- ASSERT(ip->i_udquot == NULL);
- ip->i_udquot = udqp;
- ASSERT(XFS_IS_UQUOTA_ON(mp));
- ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
- xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
- }
- if (gdqp) {
- xfs_dqlock(gdqp);
- XFS_DQHOLD(gdqp);
- xfs_dqunlock(gdqp);
- ASSERT(ip->i_gdquot == NULL);
- ip->i_gdquot = gdqp;
- ASSERT(XFS_IS_OQUOTA_ON(mp));
- ASSERT((XFS_IS_GQUOTA_ON(mp) ?
- ip->i_d.di_gid : xfs_get_projid(ip)) ==
- be32_to_cpu(gdqp->q_core.d_id));
- xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
- }
-}
-