linux/fs/gfs2/quota.c

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/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License version 2.
*/
/*
* Quota change tags are associated with each transaction that allocates or
* deallocates space. Those changes are accumulated locally to each node (in a
* per-node file) and then are periodically synced to the quota file. This
* avoids the bottleneck of constantly touching the quota file, but introduces
* fuzziness in the current usage value of IDs that are being used on different
* nodes in the cluster simultaneously. So, it is possible for a user on
* multiple nodes to overrun their quota, but that overrun is controlable.
* Since quota tags are part of transactions, there is no need for a quota check
* program to be run on node crashes or anything like that.
*
* There are couple of knobs that let the administrator manage the quota
* fuzziness. "quota_quantum" sets the maximum time a quota change can be
* sitting on one node before being synced to the quota file. (The default is
* 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency
* of quota file syncs increases as the user moves closer to their limit. The
* more frequent the syncs, the more accurate the quota enforcement, but that
* means that there is more contention between the nodes for the quota file.
* The default value is one. This sets the maximum theoretical quota overrun
* (with infinite node with infinite bandwidth) to twice the user's limit. (In
* practice, the maximum overrun you see should be much less.) A "quota_scale"
* number greater than one makes quota syncs more frequent and reduces the
* maximum overrun. Numbers less than one (but greater than zero) make quota
* syncs less frequent.
*
* GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of
* the quota file, so it is not being constantly read.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/sort.h>
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
#include <linux/fs.h>
#include <linux/bio.h>
#include <linux/gfs2_ondisk.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/quota.h>
#include <linux/dqblk_xfs.h>
#include <linux/lockref.h>
#include <linux/list_lru.h>
#include <linux/rcupdate.h>
#include <linux/rculist_bl.h>
#include <linux/bit_spinlock.h>
#include <linux/jhash.h>
#include <linux/vmalloc.h>
#include "gfs2.h"
#include "incore.h"
#include "bmap.h"
#include "glock.h"
#include "glops.h"
#include "log.h"
#include "meta_io.h"
#include "quota.h"
#include "rgrp.h"
#include "super.h"
#include "trans.h"
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
#include "inode.h"
#include "util.h"
#define GFS2_QD_HASH_SHIFT 12
#define GFS2_QD_HASH_SIZE (1 << GFS2_QD_HASH_SHIFT)
#define GFS2_QD_HASH_MASK (GFS2_QD_HASH_SIZE - 1)
/* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */
/* -> sd_bitmap_lock */
static DEFINE_SPINLOCK(qd_lock);
struct list_lru gfs2_qd_lru;
static struct hlist_bl_head qd_hash_table[GFS2_QD_HASH_SIZE];
static unsigned int gfs2_qd_hash(const struct gfs2_sbd *sdp,
const struct kqid qid)
{
unsigned int h;
h = jhash(&sdp, sizeof(struct gfs2_sbd *), 0);
h = jhash(&qid, sizeof(struct kqid), h);
return h & GFS2_QD_HASH_MASK;
}
static inline void spin_lock_bucket(unsigned int hash)
{
hlist_bl_lock(&qd_hash_table[hash]);
}
static inline void spin_unlock_bucket(unsigned int hash)
{
hlist_bl_unlock(&qd_hash_table[hash]);
}
static void gfs2_qd_dealloc(struct rcu_head *rcu)
{
struct gfs2_quota_data *qd = container_of(rcu, struct gfs2_quota_data, qd_rcu);
kmem_cache_free(gfs2_quotad_cachep, qd);
}
static void gfs2_qd_dispose(struct list_head *list)
{
struct gfs2_quota_data *qd;
struct gfs2_sbd *sdp;
while (!list_empty(list)) {
qd = list_entry(list->next, struct gfs2_quota_data, qd_lru);
sdp = qd->qd_gl->gl_sbd;
list_del(&qd->qd_lru);
/* Free from the filesystem-specific list */
spin_lock(&qd_lock);
list_del(&qd->qd_list);
spin_unlock(&qd_lock);
spin_lock_bucket(qd->qd_hash);
hlist_bl_del_rcu(&qd->qd_hlist);
spin_unlock_bucket(qd->qd_hash);
gfs2_assert_warn(sdp, !qd->qd_change);
gfs2_assert_warn(sdp, !qd->qd_slot_count);
gfs2_assert_warn(sdp, !qd->qd_bh_count);
gfs2_glock_put(qd->qd_gl);
atomic_dec(&sdp->sd_quota_count);
/* Delete it from the common reclaim list */
call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
}
}
list_lru: add helpers to isolate items Currently, the isolate callback passed to the list_lru_walk family of functions is supposed to just delete an item from the list upon returning LRU_REMOVED or LRU_REMOVED_RETRY, while nr_items counter is fixed by __list_lru_walk_one after the callback returns. Since the callback is allowed to drop the lock after removing an item (it has to return LRU_REMOVED_RETRY then), the nr_items can be less than the actual number of elements on the list even if we check them under the lock. This makes it difficult to move items from one list_lru_one to another, which is required for per-memcg list_lru reparenting - we can't just splice the lists, we have to move entries one by one. This patch therefore introduces helpers that must be used by callback functions to isolate items instead of raw list_del/list_move. These are list_lru_isolate and list_lru_isolate_move. They not only remove the entry from the list, but also fix the nr_items counter, making sure nr_items always reflects the actual number of elements on the list if checked under the appropriate lock. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Dave Chinner <david@fromorbit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-12 22:59:35 +00:00
static enum lru_status gfs2_qd_isolate(struct list_head *item,
struct list_lru_one *lru, spinlock_t *lru_lock, void *arg)
{
struct list_head *dispose = arg;
struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru);
if (!spin_trylock(&qd->qd_lockref.lock))
return LRU_SKIP;
if (qd->qd_lockref.count == 0) {
lockref_mark_dead(&qd->qd_lockref);
list_lru: add helpers to isolate items Currently, the isolate callback passed to the list_lru_walk family of functions is supposed to just delete an item from the list upon returning LRU_REMOVED or LRU_REMOVED_RETRY, while nr_items counter is fixed by __list_lru_walk_one after the callback returns. Since the callback is allowed to drop the lock after removing an item (it has to return LRU_REMOVED_RETRY then), the nr_items can be less than the actual number of elements on the list even if we check them under the lock. This makes it difficult to move items from one list_lru_one to another, which is required for per-memcg list_lru reparenting - we can't just splice the lists, we have to move entries one by one. This patch therefore introduces helpers that must be used by callback functions to isolate items instead of raw list_del/list_move. These are list_lru_isolate and list_lru_isolate_move. They not only remove the entry from the list, but also fix the nr_items counter, making sure nr_items always reflects the actual number of elements on the list if checked under the appropriate lock. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Dave Chinner <david@fromorbit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-12 22:59:35 +00:00
list_lru_isolate_move(lru, &qd->qd_lru, dispose);
}
spin_unlock(&qd->qd_lockref.lock);
return LRU_REMOVED;
}
static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink,
struct shrink_control *sc)
{
LIST_HEAD(dispose);
unsigned long freed;
if (!(sc->gfp_mask & __GFP_FS))
return SHRINK_STOP;
list_lru: introduce list_lru_shrink_{count,walk} Kmem accounting of memcg is unusable now, because it lacks slab shrinker support. That means when we hit the limit we will get ENOMEM w/o any chance to recover. What we should do then is to call shrink_slab, which would reclaim old inode/dentry caches from this cgroup. This is what this patch set is intended to do. Basically, it does two things. First, it introduces the notion of per-memcg slab shrinker. A shrinker that wants to reclaim objects per cgroup should mark itself as SHRINKER_MEMCG_AWARE. Then it will be passed the memory cgroup to scan from in shrink_control->memcg. For such shrinkers shrink_slab iterates over the whole cgroup subtree under the target cgroup and calls the shrinker for each kmem-active memory cgroup. Secondly, this patch set makes the list_lru structure per-memcg. It's done transparently to list_lru users - everything they have to do is to tell list_lru_init that they want memcg-aware list_lru. Then the list_lru will automatically distribute objects among per-memcg lists basing on which cgroup the object is accounted to. This way to make FS shrinkers (icache, dcache) memcg-aware we only need to make them use memcg-aware list_lru, and this is what this patch set does. As before, this patch set only enables per-memcg kmem reclaim when the pressure goes from memory.limit, not from memory.kmem.limit. Handling memory.kmem.limit is going to be tricky due to GFP_NOFS allocations, and it is still unclear whether we will have this knob in the unified hierarchy. This patch (of 9): NUMA aware slab shrinkers use the list_lru structure to distribute objects coming from different NUMA nodes to different lists. Whenever such a shrinker needs to count or scan objects from a particular node, it issues commands like this: count = list_lru_count_node(lru, sc->nid); freed = list_lru_walk_node(lru, sc->nid, isolate_func, isolate_arg, &sc->nr_to_scan); where sc is an instance of the shrink_control structure passed to it from vmscan. To simplify this, let's add special list_lru functions to be used by shrinkers, list_lru_shrink_count() and list_lru_shrink_walk(), which consolidate the nid and nr_to_scan arguments in the shrink_control structure. This will also allow us to avoid patching shrinkers that use list_lru when we make shrink_slab() per-memcg - all we will have to do is extend the shrink_control structure to include the target memcg and make list_lru_shrink_{count,walk} handle this appropriately. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Suggested-by: Dave Chinner <david@fromorbit.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Greg Thelen <gthelen@google.com> Cc: Glauber Costa <glommer@gmail.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-12 22:58:47 +00:00
freed = list_lru_shrink_walk(&gfs2_qd_lru, sc,
gfs2_qd_isolate, &dispose);
gfs2_qd_dispose(&dispose);
fs: convert fs shrinkers to new scan/count API Convert the filesystem shrinkers to use the new API, and standardise some of the behaviours of the shrinkers at the same time. For example, nr_to_scan means the number of objects to scan, not the number of objects to free. I refactored the CIFS idmap shrinker a little - it really needs to be broken up into a shrinker per tree and keep an item count with the tree root so that we don't need to walk the tree every time the shrinker needs to count the number of objects in the tree (i.e. all the time under memory pressure). [glommer@openvz.org: fixes for ext4, ubifs, nfs, cifs and glock. Fixes are needed mainly due to new code merged in the tree] [assorted fixes folded in] Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Glauber Costa <glommer@openvz.org> Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Acked-by: Jan Kara <jack@suse.cz> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Carlos Maiolino <cmaiolino@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Rientjes <rientjes@google.com> Cc: Gleb Natapov <gleb@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: J. Bruce Fields <bfields@redhat.com> Cc: Jan Kara <jack@suse.cz> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Stultz <john.stultz@linaro.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Kent Overstreet <koverstreet@google.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Thomas Hellstrom <thellstrom@vmware.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-28 00:18:09 +00:00
return freed;
}
static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink,
struct shrink_control *sc)
fs: convert fs shrinkers to new scan/count API Convert the filesystem shrinkers to use the new API, and standardise some of the behaviours of the shrinkers at the same time. For example, nr_to_scan means the number of objects to scan, not the number of objects to free. I refactored the CIFS idmap shrinker a little - it really needs to be broken up into a shrinker per tree and keep an item count with the tree root so that we don't need to walk the tree every time the shrinker needs to count the number of objects in the tree (i.e. all the time under memory pressure). [glommer@openvz.org: fixes for ext4, ubifs, nfs, cifs and glock. Fixes are needed mainly due to new code merged in the tree] [assorted fixes folded in] Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Glauber Costa <glommer@openvz.org> Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Acked-by: Jan Kara <jack@suse.cz> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Carlos Maiolino <cmaiolino@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Rientjes <rientjes@google.com> Cc: Gleb Natapov <gleb@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: J. Bruce Fields <bfields@redhat.com> Cc: Jan Kara <jack@suse.cz> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Stultz <john.stultz@linaro.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Kent Overstreet <koverstreet@google.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Thomas Hellstrom <thellstrom@vmware.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-28 00:18:09 +00:00
{
list_lru: introduce list_lru_shrink_{count,walk} Kmem accounting of memcg is unusable now, because it lacks slab shrinker support. That means when we hit the limit we will get ENOMEM w/o any chance to recover. What we should do then is to call shrink_slab, which would reclaim old inode/dentry caches from this cgroup. This is what this patch set is intended to do. Basically, it does two things. First, it introduces the notion of per-memcg slab shrinker. A shrinker that wants to reclaim objects per cgroup should mark itself as SHRINKER_MEMCG_AWARE. Then it will be passed the memory cgroup to scan from in shrink_control->memcg. For such shrinkers shrink_slab iterates over the whole cgroup subtree under the target cgroup and calls the shrinker for each kmem-active memory cgroup. Secondly, this patch set makes the list_lru structure per-memcg. It's done transparently to list_lru users - everything they have to do is to tell list_lru_init that they want memcg-aware list_lru. Then the list_lru will automatically distribute objects among per-memcg lists basing on which cgroup the object is accounted to. This way to make FS shrinkers (icache, dcache) memcg-aware we only need to make them use memcg-aware list_lru, and this is what this patch set does. As before, this patch set only enables per-memcg kmem reclaim when the pressure goes from memory.limit, not from memory.kmem.limit. Handling memory.kmem.limit is going to be tricky due to GFP_NOFS allocations, and it is still unclear whether we will have this knob in the unified hierarchy. This patch (of 9): NUMA aware slab shrinkers use the list_lru structure to distribute objects coming from different NUMA nodes to different lists. Whenever such a shrinker needs to count or scan objects from a particular node, it issues commands like this: count = list_lru_count_node(lru, sc->nid); freed = list_lru_walk_node(lru, sc->nid, isolate_func, isolate_arg, &sc->nr_to_scan); where sc is an instance of the shrink_control structure passed to it from vmscan. To simplify this, let's add special list_lru functions to be used by shrinkers, list_lru_shrink_count() and list_lru_shrink_walk(), which consolidate the nid and nr_to_scan arguments in the shrink_control structure. This will also allow us to avoid patching shrinkers that use list_lru when we make shrink_slab() per-memcg - all we will have to do is extend the shrink_control structure to include the target memcg and make list_lru_shrink_{count,walk} handle this appropriately. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Suggested-by: Dave Chinner <david@fromorbit.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Greg Thelen <gthelen@google.com> Cc: Glauber Costa <glommer@gmail.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-12 22:58:47 +00:00
return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc));
}
struct shrinker gfs2_qd_shrinker = {
.count_objects = gfs2_qd_shrink_count,
.scan_objects = gfs2_qd_shrink_scan,
.seeks = DEFAULT_SEEKS,
.flags = SHRINKER_NUMA_AWARE,
};
static u64 qd2index(struct gfs2_quota_data *qd)
{
struct kqid qid = qd->qd_id;
return (2 * (u64)from_kqid(&init_user_ns, qid)) +
((qid.type == USRQUOTA) ? 0 : 1);
}
static u64 qd2offset(struct gfs2_quota_data *qd)
{
u64 offset;
offset = qd2index(qd);
offset *= sizeof(struct gfs2_quota);
return offset;
}
static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid)
{
struct gfs2_quota_data *qd;
int error;
qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
if (!qd)
return NULL;
qd->qd_sbd = sdp;
qd->qd_lockref.count = 1;
spin_lock_init(&qd->qd_lockref.lock);
qd->qd_id = qid;
qd->qd_slot = -1;
INIT_LIST_HEAD(&qd->qd_lru);
qd->qd_hash = hash;
error = gfs2_glock_get(sdp, qd2index(qd),
&gfs2_quota_glops, CREATE, &qd->qd_gl);
if (error)
goto fail;
return qd;
fail:
kmem_cache_free(gfs2_quotad_cachep, qd);
return NULL;
}
static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash,
const struct gfs2_sbd *sdp,
struct kqid qid)
{
struct gfs2_quota_data *qd;
struct hlist_bl_node *h;
hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) {
if (!qid_eq(qd->qd_id, qid))
continue;
if (qd->qd_sbd != sdp)
continue;
if (lockref_get_not_dead(&qd->qd_lockref)) {
list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
return qd;
}
}
return NULL;
}
static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
struct gfs2_quota_data **qdp)
{
struct gfs2_quota_data *qd, *new_qd;
unsigned int hash = gfs2_qd_hash(sdp, qid);
rcu_read_lock();
*qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
rcu_read_unlock();
if (qd)
return 0;
new_qd = qd_alloc(hash, sdp, qid);
if (!new_qd)
return -ENOMEM;
spin_lock(&qd_lock);
spin_lock_bucket(hash);
*qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
if (qd == NULL) {
*qdp = new_qd;
list_add(&new_qd->qd_list, &sdp->sd_quota_list);
hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]);
atomic_inc(&sdp->sd_quota_count);
}
spin_unlock_bucket(hash);
spin_unlock(&qd_lock);
if (qd) {
gfs2_glock_put(new_qd->qd_gl);
kmem_cache_free(gfs2_quotad_cachep, new_qd);
}
return 0;
}
static void qd_hold(struct gfs2_quota_data *qd)
{
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref));
lockref_get(&qd->qd_lockref);
}
static void qd_put(struct gfs2_quota_data *qd)
{
if (lockref_put_or_lock(&qd->qd_lockref))
return;
qd->qd_lockref.count = 0;
list_lru_add(&gfs2_qd_lru, &qd->qd_lru);
spin_unlock(&qd->qd_lockref.lock);
}
static int slot_get(struct gfs2_quota_data *qd)
{
struct gfs2_sbd *sdp = qd->qd_sbd;
unsigned int bit;
int error = 0;
spin_lock(&sdp->sd_bitmap_lock);
if (qd->qd_slot_count != 0)
goto out;
error = -ENOSPC;
bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots);
if (bit < sdp->sd_quota_slots) {
set_bit(bit, sdp->sd_quota_bitmap);
qd->qd_slot = bit;
error = 0;
out:
qd->qd_slot_count++;
}
spin_unlock(&sdp->sd_bitmap_lock);
return error;
}
static void slot_hold(struct gfs2_quota_data *qd)
{
struct gfs2_sbd *sdp = qd->qd_sbd;
spin_lock(&sdp->sd_bitmap_lock);
gfs2_assert(sdp, qd->qd_slot_count);
qd->qd_slot_count++;
spin_unlock(&sdp->sd_bitmap_lock);
}
static void slot_put(struct gfs2_quota_data *qd)
{
struct gfs2_sbd *sdp = qd->qd_sbd;
spin_lock(&sdp->sd_bitmap_lock);
gfs2_assert(sdp, qd->qd_slot_count);
if (!--qd->qd_slot_count) {
BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap));
qd->qd_slot = -1;
}
spin_unlock(&sdp->sd_bitmap_lock);
}
static int bh_get(struct gfs2_quota_data *qd)
{
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
unsigned int block, offset;
struct buffer_head *bh;
int error;
struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
mutex_lock(&sdp->sd_quota_mutex);
if (qd->qd_bh_count++) {
mutex_unlock(&sdp->sd_quota_mutex);
return 0;
}
block = qd->qd_slot / sdp->sd_qc_per_block;
offset = qd->qd_slot % sdp->sd_qc_per_block;
bh_map.b_size = 1 << ip->i_inode.i_blkbits;
error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0);
if (error)
goto fail;
error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh);
if (error)
goto fail;
error = -EIO;
if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
goto fail_brelse;
qd->qd_bh = bh;
qd->qd_bh_qc = (struct gfs2_quota_change *)
(bh->b_data + sizeof(struct gfs2_meta_header) +
offset * sizeof(struct gfs2_quota_change));
mutex_unlock(&sdp->sd_quota_mutex);
return 0;
fail_brelse:
brelse(bh);
fail:
qd->qd_bh_count--;
mutex_unlock(&sdp->sd_quota_mutex);
return error;
}
static void bh_put(struct gfs2_quota_data *qd)
{
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
mutex_lock(&sdp->sd_quota_mutex);
gfs2_assert(sdp, qd->qd_bh_count);
if (!--qd->qd_bh_count) {
brelse(qd->qd_bh);
qd->qd_bh = NULL;
qd->qd_bh_qc = NULL;
}
mutex_unlock(&sdp->sd_quota_mutex);
}
static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
u64 *sync_gen)
{
if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
!test_bit(QDF_CHANGE, &qd->qd_flags) ||
(sync_gen && (qd->qd_sync_gen >= *sync_gen)))
return 0;
if (!lockref_get_not_dead(&qd->qd_lockref))
return 0;
list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
set_bit(QDF_LOCKED, &qd->qd_flags);
qd->qd_change_sync = qd->qd_change;
slot_hold(qd);
return 1;
}
static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
{
struct gfs2_quota_data *qd = NULL;
int error;
int found = 0;
*qdp = NULL;
if (sdp->sd_vfs->s_flags & MS_RDONLY)
return 0;
spin_lock(&qd_lock);
list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen);
if (found)
break;
}
if (!found)
qd = NULL;
spin_unlock(&qd_lock);
if (qd) {
gfs2_assert_warn(sdp, qd->qd_change_sync);
error = bh_get(qd);
if (error) {
clear_bit(QDF_LOCKED, &qd->qd_flags);
slot_put(qd);
qd_put(qd);
return error;
}
}
*qdp = qd;
return 0;
}
static void qd_unlock(struct gfs2_quota_data *qd)
{
gfs2_assert_warn(qd->qd_gl->gl_sbd,
test_bit(QDF_LOCKED, &qd->qd_flags));
clear_bit(QDF_LOCKED, &qd->qd_flags);
bh_put(qd);
slot_put(qd);
qd_put(qd);
}
static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
struct gfs2_quota_data **qdp)
{
int error;
error = qd_get(sdp, qid, qdp);
if (error)
return error;
error = slot_get(*qdp);
if (error)
goto fail;
error = bh_get(*qdp);
if (error)
goto fail_slot;
return 0;
fail_slot:
slot_put(*qdp);
fail:
qd_put(*qdp);
return error;
}
static void qdsb_put(struct gfs2_quota_data *qd)
{
bh_put(qd);
slot_put(qd);
qd_put(qd);
}
int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_quota_data **qd;
int error;
if (ip->i_res == NULL) {
error = gfs2_rs_alloc(ip);
if (error)
return error;
}
qd = ip->i_res->rs_qa_qd;
if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) ||
gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
return -EIO;
if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
return 0;
error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
if (error)
goto out;
ip->i_res->rs_qa_qd_num++;
qd++;
error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
if (error)
goto out;
ip->i_res->rs_qa_qd_num++;
qd++;
if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
!uid_eq(uid, ip->i_inode.i_uid)) {
error = qdsb_get(sdp, make_kqid_uid(uid), qd);
if (error)
goto out;
ip->i_res->rs_qa_qd_num++;
qd++;
}
if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
!gid_eq(gid, ip->i_inode.i_gid)) {
error = qdsb_get(sdp, make_kqid_gid(gid), qd);
if (error)
goto out;
ip->i_res->rs_qa_qd_num++;
qd++;
}
out:
if (error)
gfs2_quota_unhold(ip);
return error;
}
void gfs2_quota_unhold(struct gfs2_inode *ip)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
unsigned int x;
if (ip->i_res == NULL)
return;
gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
qdsb_put(ip->i_res->rs_qa_qd[x]);
ip->i_res->rs_qa_qd[x] = NULL;
}
ip->i_res->rs_qa_qd_num = 0;
}
static int sort_qd(const void *a, const void *b)
{
const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
if (qid_lt(qd_a->qd_id, qd_b->qd_id))
return -1;
if (qid_lt(qd_b->qd_id, qd_a->qd_id))
return 1;
return 0;
}
static void do_qc(struct gfs2_quota_data *qd, s64 change)
{
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
struct gfs2_quota_change *qc = qd->qd_bh_qc;
s64 x;
mutex_lock(&sdp->sd_quota_mutex);
gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
qc->qc_change = 0;
qc->qc_flags = 0;
if (qd->qd_id.type == USRQUOTA)
qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
}
x = be64_to_cpu(qc->qc_change) + change;
qc->qc_change = cpu_to_be64(x);
spin_lock(&qd_lock);
qd->qd_change = x;
spin_unlock(&qd_lock);
if (!x) {
gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
clear_bit(QDF_CHANGE, &qd->qd_flags);
qc->qc_flags = 0;
qc->qc_id = 0;
slot_put(qd);
qd_put(qd);
} else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
qd_hold(qd);
slot_hold(qd);
}
mutex_unlock(&sdp->sd_quota_mutex);
}
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
/**
* gfs2_adjust_quota - adjust record of current block usage
* @ip: The quota inode
* @loc: Offset of the entry in the quota file
* @change: The amount of usage change to record
* @qd: The quota data
* @fdq: The updated limits to record
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
*
* This function was mostly borrowed from gfs2_block_truncate_page which was
* in turn mostly borrowed from ext3
*
* Returns: 0 or -ve on error
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
*/
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
s64 change, struct gfs2_quota_data *qd,
struct qc_dqblk *fdq)
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
{
struct inode *inode = &ip->i_inode;
struct gfs2_sbd *sdp = GFS2_SB(inode);
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
struct address_space *mapping = inode->i_mapping;
unsigned long index = loc >> PAGE_CACHE_SHIFT;
unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
unsigned blocksize, iblock, pos;
struct buffer_head *bh;
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
struct page *page;
void *kaddr, *ptr;
struct gfs2_quota q;
int err, nbytes;
u64 size;
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
if (gfs2_is_stuffed(ip)) {
err = gfs2_unstuff_dinode(ip, NULL);
if (err)
return err;
}
memset(&q, 0, sizeof(struct gfs2_quota));
err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
if (err < 0)
return err;
err = -EIO;
be64_add_cpu(&q.qu_value, change);
qd->qd_qb.qb_value = q.qu_value;
if (fdq) {
if (fdq->d_fieldmask & QC_SPC_SOFT) {
q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift);
qd->qd_qb.qb_warn = q.qu_warn;
}
if (fdq->d_fieldmask & QC_SPC_HARD) {
q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift);
qd->qd_qb.qb_limit = q.qu_limit;
}
if (fdq->d_fieldmask & QC_SPACE) {
q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift);
qd->qd_qb.qb_value = q.qu_value;
}
}
/* Write the quota into the quota file on disk */
ptr = &q;
nbytes = sizeof(struct gfs2_quota);
get_a_page:
page = find_or_create_page(mapping, index, GFP_NOFS);
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
if (!page)
return -ENOMEM;
blocksize = inode->i_sb->s_blocksize;
iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
if (!page_has_buffers(page))
create_empty_buffers(page, blocksize, 0);
bh = page_buffers(page);
pos = blocksize;
while (offset >= pos) {
bh = bh->b_this_page;
iblock++;
pos += blocksize;
}
if (!buffer_mapped(bh)) {
gfs2_block_map(inode, iblock, bh, 1);
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
if (!buffer_mapped(bh))
goto unlock_out;
/* If it's a newly allocated disk block for quota, zero it */
if (buffer_new(bh))
zero_user(page, pos - blocksize, bh->b_size);
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
}
if (PageUptodate(page))
set_buffer_uptodate(bh);
if (!buffer_uptodate(bh)) {
ll_rw_block(READ | REQ_META, 1, &bh);
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
wait_on_buffer(bh);
if (!buffer_uptodate(bh))
goto unlock_out;
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
}
gfs2_trans_add_data(ip->i_gl, bh);
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
kaddr = kmap_atomic(page);
if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE)
nbytes = PAGE_CACHE_SIZE - offset;
memcpy(kaddr + offset, ptr, nbytes);
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
flush_dcache_page(page);
kunmap_atomic(kaddr);
unlock_page(page);
page_cache_release(page);
/* If quota straddles page boundary, we need to update the rest of the
* quota at the beginning of the next page */
if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) {
ptr = ptr + nbytes;
nbytes = sizeof(struct gfs2_quota) - nbytes;
offset = 0;
index++;
goto get_a_page;
}
size = loc + sizeof(struct gfs2_quota);
if (size > inode->i_size)
i_size_write(inode, size);
inode->i_mtime = inode->i_atime = CURRENT_TIME;
mark_inode_dirty(inode);
set_bit(QDF_REFRESH, &qd->qd_flags);
return 0;
unlock_out:
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
unlock_page(page);
page_cache_release(page);
return err;
}
static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
{
struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd;
struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
struct gfs2_alloc_parms ap = { .aflags = 0, };
unsigned int data_blocks, ind_blocks;
struct gfs2_holder *ghs, i_gh;
unsigned int qx, x;
struct gfs2_quota_data *qd;
unsigned reserved;
loff_t offset;
unsigned int nalloc = 0, blocks;
int error;
error = gfs2_rs_alloc(ip);
if (error)
return error;
gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
&data_blocks, &ind_blocks);
ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
if (!ghs)
return -ENOMEM;
sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
mutex_lock(&ip->i_inode.i_mutex);
for (qx = 0; qx < num_qd; qx++) {
error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
GL_NOCACHE, &ghs[qx]);
if (error)
goto out;
}
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
if (error)
goto out;
for (x = 0; x < num_qd; x++) {
offset = qd2offset(qda[x]);
if (gfs2_write_alloc_required(ip, offset,
sizeof(struct gfs2_quota)))
nalloc++;
}
/*
* 1 blk for unstuffing inode if stuffed. We add this extra
* block to the reservation unconditionally. If the inode
* doesn't need unstuffing, the block will be released to the
* rgrp since it won't be allocated during the transaction
*/
/* +3 in the end for unstuffing block, inode size update block
* and another block in case quota straddles page boundary and
* two blocks need to be updated instead of 1 */
blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
reserved = 1 + (nalloc * (data_blocks + ind_blocks));
ap.target = reserved;
error = gfs2_inplace_reserve(ip, &ap);
if (error)
goto out_alloc;
if (nalloc)
blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
error = gfs2_trans_begin(sdp, blocks, 0);
if (error)
goto out_ipres;
for (x = 0; x < num_qd; x++) {
qd = qda[x];
offset = qd2offset(qd);
error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
[GFS2] Make journaled data files identical to normal files on disk This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-08 11:50:51 +00:00
if (error)
goto out_end_trans;
do_qc(qd, -qd->qd_change_sync);
set_bit(QDF_REFRESH, &qd->qd_flags);
}
error = 0;
out_end_trans:
gfs2_trans_end(sdp);
out_ipres:
gfs2_inplace_release(ip);
out_alloc:
gfs2_glock_dq_uninit(&i_gh);
out:
while (qx--)
gfs2_glock_dq_uninit(&ghs[qx]);
mutex_unlock(&ip->i_inode.i_mutex);
kfree(ghs);
GFS2: remove transaction glock GFS2 has a transaction glock, which must be grabbed for every transaction, whose purpose is to deal with freezing the filesystem. Aside from this involving a large amount of locking, it is very easy to make the current fsfreeze code hang on unfreezing. This patch rewrites how gfs2 handles freezing the filesystem. The transaction glock is removed. In it's place is a freeze glock, which is cached (but not held) in a shared state by every node in the cluster when the filesystem is mounted. This lock only needs to be grabbed on freezing, and actions which need to be safe from freezing, like recovery. When a node wants to freeze the filesystem, it grabs this glock exclusively. When the freeze glock state changes on the nodes (either from shared to unlocked, or shared to exclusive), the filesystem does a special log flush. gfs2_log_flush() does all the work for flushing out the and shutting down the incore log, and then it tries to grab the freeze glock in a shared state again. Since the filesystem is stuck in gfs2_log_flush, no new transaction can start, and nothing can be written to disk. Unfreezing the filesytem simply involes dropping the freeze glock, allowing gfs2_log_flush() to grab and then release the shared lock, so it is cached for next time. However, in order for the unfreezing ioctl to occur, gfs2 needs to get a shared lock on the filesystem root directory inode to check permissions. If that glock has already been grabbed exclusively, fsfreeze will be unable to get the shared lock and unfreeze the filesystem. In order to allow the unfreeze, this patch makes gfs2 grab a shared lock on the filesystem root directory during the freeze, and hold it until it unfreezes the filesystem. The functions which need to grab a shared lock in order to allow the unfreeze ioctl to be issued now use the lock grabbed by the freeze code instead. The freeze and unfreeze code take care to make sure that this shared lock will not be dropped while another process is using it. Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2014-05-02 03:26:55 +00:00
gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl, NORMAL_FLUSH);
return error;
}
static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
{
struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
struct gfs2_quota q;
struct gfs2_quota_lvb *qlvb;
loff_t pos;
int error;
memset(&q, 0, sizeof(struct gfs2_quota));
pos = qd2offset(qd);
error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
if (error < 0)
return error;
qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
qlvb->__pad = 0;
qlvb->qb_limit = q.qu_limit;
qlvb->qb_warn = q.qu_warn;
qlvb->qb_value = q.qu_value;
qd->qd_qb = *qlvb;
return 0;
}
static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
struct gfs2_holder *q_gh)
{
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
struct gfs2_holder i_gh;
int error;
restart:
error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
if (error)
return error;
qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
gfs2_glock_dq_uninit(q_gh);
error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
GL_NOCACHE, q_gh);
if (error)
return error;
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
if (error)
goto fail;
error = update_qd(sdp, qd);
if (error)
goto fail_gunlock;
gfs2_glock_dq_uninit(&i_gh);
gfs2_glock_dq_uninit(q_gh);
force_refresh = 0;
goto restart;
}
return 0;
fail_gunlock:
gfs2_glock_dq_uninit(&i_gh);
fail:
gfs2_glock_dq_uninit(q_gh);
return error;
}
int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_quota_data *qd;
unsigned int x;
int error = 0;
error = gfs2_quota_hold(ip, uid, gid);
if (error)
return error;
if (capable(CAP_SYS_RESOURCE) ||
sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
return 0;
sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num,
sizeof(struct gfs2_quota_data *), sort_qd, NULL);
for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
int force = NO_FORCE;
qd = ip->i_res->rs_qa_qd[x];
if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
force = FORCE;
error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]);
if (error)
break;
}
if (!error)
set_bit(GIF_QD_LOCKED, &ip->i_flags);
else {
while (x--)
gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
gfs2_quota_unhold(ip);
}
return error;
}
static int need_sync(struct gfs2_quota_data *qd)
{
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
struct gfs2_tune *gt = &sdp->sd_tune;
s64 value;
unsigned int num, den;
int do_sync = 1;
if (!qd->qd_qb.qb_limit)
return 0;
spin_lock(&qd_lock);
value = qd->qd_change;
spin_unlock(&qd_lock);
spin_lock(&gt->gt_spin);
num = gt->gt_quota_scale_num;
den = gt->gt_quota_scale_den;
spin_unlock(&gt->gt_spin);
if (value < 0)
do_sync = 0;
else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
(s64)be64_to_cpu(qd->qd_qb.qb_limit))
do_sync = 0;
else {
value *= gfs2_jindex_size(sdp) * num;
value = div_s64(value, den);
value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
do_sync = 0;
}
return do_sync;
}
void gfs2_quota_unlock(struct gfs2_inode *ip)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_quota_data *qda[4];
unsigned int count = 0;
unsigned int x;
int found;
if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
goto out;
for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
struct gfs2_quota_data *qd;
int sync;
qd = ip->i_res->rs_qa_qd[x];
sync = need_sync(qd);
gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
if (!sync)
continue;
spin_lock(&qd_lock);
found = qd_check_sync(sdp, qd, NULL);
spin_unlock(&qd_lock);
if (!found)
continue;
gfs2_assert_warn(sdp, qd->qd_change_sync);
if (bh_get(qd)) {
clear_bit(QDF_LOCKED, &qd->qd_flags);
slot_put(qd);
qd_put(qd);
continue;
}
qda[count++] = qd;
}
if (count) {
do_sync(count, qda);
for (x = 0; x < count; x++)
qd_unlock(qda[x]);
}
out:
gfs2_quota_unhold(ip);
}
#define MAX_LINE 256
static int print_message(struct gfs2_quota_data *qd, char *type)
{
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
fs_info(sdp, "quota %s for %s %u\n",
type,
(qd->qd_id.type == USRQUOTA) ? "user" : "group",
from_kqid(&init_user_ns, qd->qd_id));
return 0;
}
int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_quota_data *qd;
s64 value;
unsigned int x;
int error = 0;
if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
return 0;
if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
return 0;
for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
qd = ip->i_res->rs_qa_qd[x];
if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
qid_eq(qd->qd_id, make_kqid_gid(gid))))
continue;
value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
spin_lock(&qd_lock);
value += qd->qd_change;
spin_unlock(&qd_lock);
if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) {
print_message(qd, "exceeded");
quota_send_warning(qd->qd_id,
sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN);
error = -EDQUOT;
break;
} else if (be64_to_cpu(qd->qd_qb.qb_warn) &&
(s64)be64_to_cpu(qd->qd_qb.qb_warn) < value &&
time_after_eq(jiffies, qd->qd_last_warn +
gfs2_tune_get(sdp,
gt_quota_warn_period) * HZ)) {
quota_send_warning(qd->qd_id,
sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
error = print_message(qd, "warning");
qd->qd_last_warn = jiffies;
}
}
return error;
}
void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
kuid_t uid, kgid_t gid)
{
struct gfs2_quota_data *qd;
unsigned int x;
if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change))
return;
if (ip->i_diskflags & GFS2_DIF_SYSTEM)
return;
for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
qd = ip->i_res->rs_qa_qd[x];
if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
qid_eq(qd->qd_id, make_kqid_gid(gid))) {
do_qc(qd, change);
}
}
}
int gfs2_quota_sync(struct super_block *sb, int type)
{
struct gfs2_sbd *sdp = sb->s_fs_info;
struct gfs2_quota_data **qda;
unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder);
unsigned int num_qd;
unsigned int x;
int error = 0;
qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
if (!qda)
return -ENOMEM;
mutex_lock(&sdp->sd_quota_sync_mutex);
sdp->sd_quota_sync_gen++;
do {
num_qd = 0;
for (;;) {
error = qd_fish(sdp, qda + num_qd);
if (error || !qda[num_qd])
break;
if (++num_qd == max_qd)
break;
}
if (num_qd) {
if (!error)
error = do_sync(num_qd, qda);
if (!error)
for (x = 0; x < num_qd; x++)
qda[x]->qd_sync_gen =
sdp->sd_quota_sync_gen;
for (x = 0; x < num_qd; x++)
qd_unlock(qda[x]);
}
} while (!error && num_qd == max_qd);
mutex_unlock(&sdp->sd_quota_sync_mutex);
kfree(qda);
return error;
}
int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
{
struct gfs2_quota_data *qd;
struct gfs2_holder q_gh;
int error;
error = qd_get(sdp, qid, &qd);
if (error)
return error;
error = do_glock(qd, FORCE, &q_gh);
if (!error)
gfs2_glock_dq_uninit(&q_gh);
qd_put(qd);
return error;
}
int gfs2_quota_init(struct gfs2_sbd *sdp)
{
struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
u64 size = i_size_read(sdp->sd_qc_inode);
unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
unsigned int x, slot = 0;
unsigned int found = 0;
unsigned int hash;
unsigned int bm_size;
u64 dblock;
u32 extlen = 0;
int error;
if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
return -EIO;
sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
bm_size *= sizeof(unsigned long);
error = -ENOMEM;
sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
if (sdp->sd_quota_bitmap == NULL)
sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
__GFP_ZERO, PAGE_KERNEL);
if (!sdp->sd_quota_bitmap)
return error;
for (x = 0; x < blocks; x++) {
struct buffer_head *bh;
const struct gfs2_quota_change *qc;
unsigned int y;
if (!extlen) {
int new = 0;
error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen);
if (error)
goto fail;
}
error = -EIO;
bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
if (!bh)
goto fail;
if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
brelse(bh);
goto fail;
}
qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
y++, slot++) {
struct gfs2_quota_data *qd;
s64 qc_change = be64_to_cpu(qc->qc_change);
u32 qc_flags = be32_to_cpu(qc->qc_flags);
enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
USRQUOTA : GRPQUOTA;
struct kqid qc_id = make_kqid(&init_user_ns, qtype,
be32_to_cpu(qc->qc_id));
qc++;
if (!qc_change)
continue;
hash = gfs2_qd_hash(sdp, qc_id);
qd = qd_alloc(hash, sdp, qc_id);
if (qd == NULL) {
brelse(bh);
goto fail;
}
set_bit(QDF_CHANGE, &qd->qd_flags);
qd->qd_change = qc_change;
qd->qd_slot = slot;
qd->qd_slot_count = 1;
spin_lock(&qd_lock);
BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
list_add(&qd->qd_list, &sdp->sd_quota_list);
atomic_inc(&sdp->sd_quota_count);
spin_unlock(&qd_lock);
spin_lock_bucket(hash);
hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
spin_unlock_bucket(hash);
found++;
}
brelse(bh);
dblock++;
extlen--;
}
if (found)
fs_info(sdp, "found %u quota changes\n", found);
return 0;
fail:
gfs2_quota_cleanup(sdp);
return error;
}
void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
{
struct list_head *head = &sdp->sd_quota_list;
struct gfs2_quota_data *qd;
spin_lock(&qd_lock);
while (!list_empty(head)) {
qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
list_del(&qd->qd_list);
/* Also remove if this qd exists in the reclaim list */
list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
atomic_dec(&sdp->sd_quota_count);
spin_unlock(&qd_lock);
spin_lock_bucket(qd->qd_hash);
hlist_bl_del_rcu(&qd->qd_hlist);
spin_unlock_bucket(qd->qd_hash);
gfs2_assert_warn(sdp, !qd->qd_change);
gfs2_assert_warn(sdp, !qd->qd_slot_count);
gfs2_assert_warn(sdp, !qd->qd_bh_count);
gfs2_glock_put(qd->qd_gl);
call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
spin_lock(&qd_lock);
}
spin_unlock(&qd_lock);
gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
kvfree(sdp->sd_quota_bitmap);
sdp->sd_quota_bitmap = NULL;
}
static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
{
if (error == 0 || error == -EROFS)
return;
if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
}
static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
int (*fxn)(struct super_block *sb, int type),
unsigned long t, unsigned long *timeo,
unsigned int *new_timeo)
{
if (t >= *timeo) {
int error = fxn(sdp->sd_vfs, 0);
quotad_error(sdp, msg, error);
*timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
} else {
*timeo -= t;
}
}
static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
{
struct gfs2_inode *ip;
while(1) {
ip = NULL;
spin_lock(&sdp->sd_trunc_lock);
if (!list_empty(&sdp->sd_trunc_list)) {
ip = list_entry(sdp->sd_trunc_list.next,
struct gfs2_inode, i_trunc_list);
list_del_init(&ip->i_trunc_list);
}
spin_unlock(&sdp->sd_trunc_lock);
if (ip == NULL)
return;
gfs2_glock_finish_truncate(ip);
}
}
void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
if (!sdp->sd_statfs_force_sync) {
sdp->sd_statfs_force_sync = 1;
wake_up(&sdp->sd_quota_wait);
}
}
/**
* gfs2_quotad - Write cached quota changes into the quota file
* @sdp: Pointer to GFS2 superblock
*
*/
int gfs2_quotad(void *data)
{
struct gfs2_sbd *sdp = data;
struct gfs2_tune *tune = &sdp->sd_tune;
unsigned long statfs_timeo = 0;
unsigned long quotad_timeo = 0;
unsigned long t = 0;
DEFINE_WAIT(wait);
int empty;
while (!kthread_should_stop()) {
/* Update the master statfs file */
if (sdp->sd_statfs_force_sync) {
int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
quotad_error(sdp, "statfs", error);
statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
}
else
quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
&statfs_timeo,
&tune->gt_statfs_quantum);
/* Update quota file */
quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
&quotad_timeo, &tune->gt_quota_quantum);
/* Check for & recover partially truncated inodes */
quotad_check_trunc_list(sdp);
try_to_freeze();
t = min(quotad_timeo, statfs_timeo);
prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
spin_lock(&sdp->sd_trunc_lock);
empty = list_empty(&sdp->sd_trunc_list);
spin_unlock(&sdp->sd_trunc_lock);
if (empty && !sdp->sd_statfs_force_sync)
t -= schedule_timeout(t);
else
t = 0;
finish_wait(&sdp->sd_quota_wait, &wait);
}
return 0;
}
static int gfs2_quota_get_xstate(struct super_block *sb,
struct fs_quota_stat *fqs)
{
struct gfs2_sbd *sdp = sb->s_fs_info;
memset(fqs, 0, sizeof(struct fs_quota_stat));
fqs->qs_version = FS_QSTAT_VERSION;
switch (sdp->sd_args.ar_quota) {
case GFS2_QUOTA_ON:
fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD);
/*FALLTHRU*/
case GFS2_QUOTA_ACCOUNT:
fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT);
break;
case GFS2_QUOTA_OFF:
break;
}
if (sdp->sd_quota_inode) {
fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr;
fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks;
}
fqs->qs_uquota.qfs_nextents = 1; /* unsupported */
fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */
fqs->qs_incoredqs = list_lru_count(&gfs2_qd_lru);
return 0;
}
static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
struct qc_dqblk *fdq)
{
struct gfs2_sbd *sdp = sb->s_fs_info;
struct gfs2_quota_lvb *qlvb;
struct gfs2_quota_data *qd;
struct gfs2_holder q_gh;
int error;
memset(fdq, 0, sizeof(*fdq));
if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
return -ESRCH; /* Crazy XFS error code */
if ((qid.type != USRQUOTA) &&
(qid.type != GRPQUOTA))
return -EINVAL;
error = qd_get(sdp, qid, &qd);
if (error)
return error;
error = do_glock(qd, FORCE, &q_gh);
if (error)
goto out;
qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift;
fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift;
fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift;
gfs2_glock_dq_uninit(&q_gh);
out:
qd_put(qd);
return error;
}
/* GFS2 only supports a subset of the XFS fields */
#define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE)
static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
struct qc_dqblk *fdq)
{
struct gfs2_sbd *sdp = sb->s_fs_info;
struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
struct gfs2_quota_data *qd;
struct gfs2_holder q_gh, i_gh;
unsigned int data_blocks, ind_blocks;
unsigned int blocks = 0;
int alloc_required;
loff_t offset;
int error;
if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
return -ESRCH; /* Crazy XFS error code */
if ((qid.type != USRQUOTA) &&
(qid.type != GRPQUOTA))
return -EINVAL;
if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
return -EINVAL;
error = qd_get(sdp, qid, &qd);
if (error)
return error;
error = gfs2_rs_alloc(ip);
if (error)
goto out_put;
mutex_lock(&ip->i_inode.i_mutex);
error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
if (error)
goto out_unlockput;
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
if (error)
goto out_q;
/* Check for existing entry, if none then alloc new blocks */
error = update_qd(sdp, qd);
if (error)
goto out_i;
/* If nothing has changed, this is a no-op */
if ((fdq->d_fieldmask & QC_SPC_SOFT) &&
((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
fdq->d_fieldmask ^= QC_SPC_SOFT;
if ((fdq->d_fieldmask & QC_SPC_HARD) &&
((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
fdq->d_fieldmask ^= QC_SPC_HARD;
if ((fdq->d_fieldmask & QC_SPACE) &&
((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
fdq->d_fieldmask ^= QC_SPACE;
if (fdq->d_fieldmask == 0)
goto out_i;
offset = qd2offset(qd);
alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
if (gfs2_is_stuffed(ip))
alloc_required = 1;
if (alloc_required) {
struct gfs2_alloc_parms ap = { .aflags = 0, };
gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
&data_blocks, &ind_blocks);
blocks = 1 + data_blocks + ind_blocks;
ap.target = blocks;
error = gfs2_inplace_reserve(ip, &ap);
if (error)
goto out_i;
blocks += gfs2_rg_blocks(ip, blocks);
}
/* Some quotas span block boundaries and can update two blocks,
adding an extra block to the transaction to handle such quotas */
error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
if (error)
goto out_release;
/* Apply changes */
error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
gfs2_trans_end(sdp);
out_release:
if (alloc_required)
gfs2_inplace_release(ip);
out_i:
gfs2_glock_dq_uninit(&i_gh);
out_q:
gfs2_glock_dq_uninit(&q_gh);
out_unlockput:
mutex_unlock(&ip->i_inode.i_mutex);
out_put:
qd_put(qd);
return error;
}
const struct quotactl_ops gfs2_quotactl_ops = {
.quota_sync = gfs2_quota_sync,
.get_xstate = gfs2_quota_get_xstate,
.get_dqblk = gfs2_get_dqblk,
.set_dqblk = gfs2_set_dqblk,
};
void __init gfs2_quota_hash_init(void)
{
unsigned i;
for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
INIT_HLIST_BL_HEAD(&qd_hash_table[i]);
}