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linux-stable/fs/ocfs2/quota_local.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

1343 lines
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/*
* Implementation of operations over local quota file
*/
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/quota.h>
#include <linux/quotaops.h>
#include <linux/module.h>
#define MLOG_MASK_PREFIX ML_QUOTA
#include <cluster/masklog.h>
#include "ocfs2_fs.h"
#include "ocfs2.h"
#include "inode.h"
#include "alloc.h"
#include "file.h"
#include "buffer_head_io.h"
#include "journal.h"
#include "sysfile.h"
#include "dlmglue.h"
#include "quota.h"
#include "uptodate.h"
/* Number of local quota structures per block */
static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
{
return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
sizeof(struct ocfs2_local_disk_dqblk));
}
/* Number of blocks with entries in one chunk */
static inline unsigned int ol_chunk_blocks(struct super_block *sb)
{
return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
OCFS2_QBLK_RESERVED_SPACE) << 3) /
ol_quota_entries_per_block(sb);
}
/* Number of entries in a chunk bitmap */
static unsigned int ol_chunk_entries(struct super_block *sb)
{
return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
}
/* Offset of the chunk in quota file */
static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
{
/* 1 block for local quota file info, 1 block per chunk for chunk info */
return 1 + (ol_chunk_blocks(sb) + 1) * c;
}
static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
{
int epb = ol_quota_entries_per_block(sb);
return ol_quota_chunk_block(sb, c) + 1 + off / epb;
}
static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
{
int epb = ol_quota_entries_per_block(sb);
return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
}
/* Offset of the dquot structure in the quota file */
static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
{
return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
ol_dqblk_block_off(sb, c, off);
}
/* Compute block number from given offset */
static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
{
return off >> sb->s_blocksize_bits;
}
static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
{
return off & ((1 << sb->s_blocksize_bits) - 1);
}
/* Compute offset in the chunk of a structure with the given offset */
static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
{
int epb = ol_quota_entries_per_block(sb);
return ((off >> sb->s_blocksize_bits) -
ol_quota_chunk_block(sb, c) - 1) * epb
+ ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
sizeof(struct ocfs2_local_disk_dqblk);
}
/* Write bufferhead into the fs */
static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
void (*modify)(struct buffer_head *, void *), void *private)
{
struct super_block *sb = inode->i_sb;
handle_t *handle;
int status;
handle = ocfs2_start_trans(OCFS2_SB(sb),
OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
return status;
}
status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
ocfs2_commit_trans(OCFS2_SB(sb), handle);
return status;
}
lock_buffer(bh);
modify(bh, private);
unlock_buffer(bh);
status = ocfs2_journal_dirty(handle, bh);
if (status < 0) {
mlog_errno(status);
ocfs2_commit_trans(OCFS2_SB(sb), handle);
return status;
}
status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
if (status < 0) {
mlog_errno(status);
return status;
}
return 0;
}
/* Check whether we understand format of quota files */
static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
{
unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
GROUP_QUOTA_SYSTEM_INODE };
struct buffer_head *bh = NULL;
struct inode *linode = sb_dqopt(sb)->files[type];
struct inode *ginode = NULL;
struct ocfs2_disk_dqheader *dqhead;
int status, ret = 0;
/* First check whether we understand local quota file */
status = ocfs2_read_quota_block(linode, 0, &bh);
if (status) {
mlog_errno(status);
mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
type);
goto out_err;
}
dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
" type=%d\n", le32_to_cpu(dqhead->dqh_magic),
lmagics[type], type);
goto out_err;
}
if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
mlog(ML_ERROR, "quota file version does not match (%u != %u),"
" type=%d\n", le32_to_cpu(dqhead->dqh_version),
lversions[type], type);
goto out_err;
}
brelse(bh);
bh = NULL;
/* Next check whether we understand global quota file */
ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
OCFS2_INVALID_SLOT);
if (!ginode) {
mlog(ML_ERROR, "cannot get global quota file inode "
"(type=%d)\n", type);
goto out_err;
}
/* Since the header is read only, we don't care about locking */
status = ocfs2_read_quota_block(ginode, 0, &bh);
if (status) {
mlog_errno(status);
mlog(ML_ERROR, "failed to read global quota file header "
"(type=%d)\n", type);
goto out_err;
}
dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
mlog(ML_ERROR, "global quota file magic does not match "
"(%u != %u), type=%d\n",
le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
goto out_err;
}
if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
mlog(ML_ERROR, "global quota file version does not match "
"(%u != %u), type=%d\n",
le32_to_cpu(dqhead->dqh_version), gversions[type],
type);
goto out_err;
}
ret = 1;
out_err:
brelse(bh);
iput(ginode);
return ret;
}
/* Release given list of quota file chunks */
static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
{
struct ocfs2_quota_chunk *pos, *next;
list_for_each_entry_safe(pos, next, head, qc_chunk) {
list_del(&pos->qc_chunk);
brelse(pos->qc_headerbh);
kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
}
}
/* Load quota bitmaps into memory */
static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
struct ocfs2_local_disk_dqinfo *ldinfo,
struct list_head *head)
{
struct ocfs2_quota_chunk *newchunk;
int i, status;
INIT_LIST_HEAD(head);
for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
if (!newchunk) {
ocfs2_release_local_quota_bitmaps(head);
return -ENOMEM;
}
newchunk->qc_num = i;
newchunk->qc_headerbh = NULL;
status = ocfs2_read_quota_block(inode,
ol_quota_chunk_block(inode->i_sb, i),
&newchunk->qc_headerbh);
if (status) {
mlog_errno(status);
kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
ocfs2_release_local_quota_bitmaps(head);
return status;
}
list_add_tail(&newchunk->qc_chunk, head);
}
return 0;
}
static void olq_update_info(struct buffer_head *bh, void *private)
{
struct mem_dqinfo *info = private;
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
struct ocfs2_local_disk_dqinfo *ldinfo;
ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
OCFS2_LOCAL_INFO_OFF);
spin_lock(&dq_data_lock);
ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
spin_unlock(&dq_data_lock);
}
static int ocfs2_add_recovery_chunk(struct super_block *sb,
struct ocfs2_local_disk_chunk *dchunk,
int chunk,
struct list_head *head)
{
struct ocfs2_recovery_chunk *rc;
rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
if (!rc)
return -ENOMEM;
rc->rc_chunk = chunk;
rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
if (!rc->rc_bitmap) {
kfree(rc);
return -ENOMEM;
}
memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
(ol_chunk_entries(sb) + 7) >> 3);
list_add_tail(&rc->rc_list, head);
return 0;
}
static void free_recovery_list(struct list_head *head)
{
struct ocfs2_recovery_chunk *next;
struct ocfs2_recovery_chunk *rchunk;
list_for_each_entry_safe(rchunk, next, head, rc_list) {
list_del(&rchunk->rc_list);
kfree(rchunk->rc_bitmap);
kfree(rchunk);
}
}
void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
{
int type;
for (type = 0; type < MAXQUOTAS; type++)
free_recovery_list(&(rec->r_list[type]));
kfree(rec);
}
/* Load entries in our quota file we have to recover*/
static int ocfs2_recovery_load_quota(struct inode *lqinode,
struct ocfs2_local_disk_dqinfo *ldinfo,
int type,
struct list_head *head)
{
struct super_block *sb = lqinode->i_sb;
struct buffer_head *hbh;
struct ocfs2_local_disk_chunk *dchunk;
int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
int status = 0;
for (i = 0; i < chunks; i++) {
hbh = NULL;
status = ocfs2_read_quota_block(lqinode,
ol_quota_chunk_block(sb, i),
&hbh);
if (status) {
mlog_errno(status);
break;
}
dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
brelse(hbh);
if (status < 0)
break;
}
if (status < 0)
free_recovery_list(head);
return status;
}
static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
{
int type;
struct ocfs2_quota_recovery *rec;
rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
if (!rec)
return NULL;
for (type = 0; type < MAXQUOTAS; type++)
INIT_LIST_HEAD(&(rec->r_list[type]));
return rec;
}
/* Load information we need for quota recovery into memory */
struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
struct ocfs2_super *osb,
int slot_num)
{
unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
LOCAL_GROUP_QUOTA_SYSTEM_INODE };
struct super_block *sb = osb->sb;
struct ocfs2_local_disk_dqinfo *ldinfo;
struct inode *lqinode;
struct buffer_head *bh;
int type;
int status = 0;
struct ocfs2_quota_recovery *rec;
mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num);
rec = ocfs2_alloc_quota_recovery();
if (!rec)
return ERR_PTR(-ENOMEM);
/* First init... */
for (type = 0; type < MAXQUOTAS; type++) {
if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
continue;
/* At this point, journal of the slot is already replayed so
* we can trust metadata and data of the quota file */
lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
if (!lqinode) {
status = -ENOENT;
goto out;
}
status = ocfs2_inode_lock_full(lqinode, NULL, 1,
OCFS2_META_LOCK_RECOVERY);
if (status < 0) {
mlog_errno(status);
goto out_put;
}
/* Now read local header */
bh = NULL;
status = ocfs2_read_quota_block(lqinode, 0, &bh);
if (status) {
mlog_errno(status);
mlog(ML_ERROR, "failed to read quota file info header "
"(slot=%d type=%d)\n", slot_num, type);
goto out_lock;
}
ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
OCFS2_LOCAL_INFO_OFF);
status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
&rec->r_list[type]);
brelse(bh);
out_lock:
ocfs2_inode_unlock(lqinode, 1);
out_put:
iput(lqinode);
if (status < 0)
break;
}
out:
if (status < 0) {
ocfs2_free_quota_recovery(rec);
rec = ERR_PTR(status);
}
return rec;
}
/* Sync changes in local quota file into global quota file and
* reinitialize local quota file.
* The function expects local quota file to be already locked and
* dqonoff_mutex locked. */
static int ocfs2_recover_local_quota_file(struct inode *lqinode,
int type,
struct ocfs2_quota_recovery *rec)
{
struct super_block *sb = lqinode->i_sb;
struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
struct ocfs2_local_disk_chunk *dchunk;
struct ocfs2_local_disk_dqblk *dqblk;
struct dquot *dquot;
handle_t *handle;
struct buffer_head *hbh = NULL, *qbh = NULL;
int status = 0;
int bit, chunk;
struct ocfs2_recovery_chunk *rchunk, *next;
qsize_t spacechange, inodechange;
mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type);
list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
chunk = rchunk->rc_chunk;
hbh = NULL;
status = ocfs2_read_quota_block(lqinode,
ol_quota_chunk_block(sb, chunk),
&hbh);
if (status) {
mlog_errno(status);
break;
}
dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
qbh = NULL;
status = ocfs2_read_quota_block(lqinode,
ol_dqblk_block(sb, chunk, bit),
&qbh);
if (status) {
mlog_errno(status);
break;
}
dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
ol_dqblk_block_off(sb, chunk, bit));
dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
if (!dquot) {
status = -EIO;
mlog(ML_ERROR, "Failed to get quota structure "
"for id %u, type %d. Cannot finish quota "
"file recovery.\n",
(unsigned)le64_to_cpu(dqblk->dqb_id),
type);
goto out_put_bh;
}
status = ocfs2_lock_global_qf(oinfo, 1);
if (status < 0) {
mlog_errno(status);
goto out_put_dquot;
}
handle = ocfs2_start_trans(OCFS2_SB(sb),
OCFS2_QSYNC_CREDITS);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto out_drop_lock;
}
mutex_lock(&sb_dqopt(sb)->dqio_mutex);
spin_lock(&dq_data_lock);
/* Add usage from quota entry into quota changes
* of our node. Auxiliary variables are important
* due to signedness */
spacechange = le64_to_cpu(dqblk->dqb_spacemod);
inodechange = le64_to_cpu(dqblk->dqb_inodemod);
dquot->dq_dqb.dqb_curspace += spacechange;
dquot->dq_dqb.dqb_curinodes += inodechange;
spin_unlock(&dq_data_lock);
/* We want to drop reference held by the crashed
* node. Since we have our own reference we know
* global structure actually won't be freed. */
status = ocfs2_global_release_dquot(dquot);
if (status < 0) {
mlog_errno(status);
goto out_commit;
}
/* Release local quota file entry */
status = ocfs2_journal_access_dq(handle,
INODE_CACHE(lqinode),
qbh, OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto out_commit;
}
lock_buffer(qbh);
WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap));
ocfs2_clear_bit(bit, dchunk->dqc_bitmap);
le32_add_cpu(&dchunk->dqc_free, 1);
unlock_buffer(qbh);
status = ocfs2_journal_dirty(handle, qbh);
if (status < 0)
mlog_errno(status);
out_commit:
mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
ocfs2_commit_trans(OCFS2_SB(sb), handle);
out_drop_lock:
ocfs2_unlock_global_qf(oinfo, 1);
out_put_dquot:
dqput(dquot);
out_put_bh:
brelse(qbh);
if (status < 0)
break;
}
brelse(hbh);
list_del(&rchunk->rc_list);
kfree(rchunk->rc_bitmap);
kfree(rchunk);
if (status < 0)
break;
}
if (status < 0)
free_recovery_list(&(rec->r_list[type]));
mlog_exit(status);
return status;
}
/* Recover local quota files for given node different from us */
int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
struct ocfs2_quota_recovery *rec,
int slot_num)
{
unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
LOCAL_GROUP_QUOTA_SYSTEM_INODE };
struct super_block *sb = osb->sb;
struct ocfs2_local_disk_dqinfo *ldinfo;
struct buffer_head *bh;
handle_t *handle;
int type;
int status = 0;
struct inode *lqinode;
unsigned int flags;
mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num);
mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
for (type = 0; type < MAXQUOTAS; type++) {
if (list_empty(&(rec->r_list[type])))
continue;
mlog(0, "Recovering quota in slot %d\n", slot_num);
lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
if (!lqinode) {
status = -ENOENT;
goto out;
}
status = ocfs2_inode_lock_full(lqinode, NULL, 1,
OCFS2_META_LOCK_NOQUEUE);
/* Someone else is holding the lock? Then he must be
* doing the recovery. Just skip the file... */
if (status == -EAGAIN) {
mlog(ML_NOTICE, "skipping quota recovery for slot %d "
"because quota file is locked.\n", slot_num);
status = 0;
goto out_put;
} else if (status < 0) {
mlog_errno(status);
goto out_put;
}
/* Now read local header */
bh = NULL;
status = ocfs2_read_quota_block(lqinode, 0, &bh);
if (status) {
mlog_errno(status);
mlog(ML_ERROR, "failed to read quota file info header "
"(slot=%d type=%d)\n", slot_num, type);
goto out_lock;
}
ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
OCFS2_LOCAL_INFO_OFF);
/* Is recovery still needed? */
flags = le32_to_cpu(ldinfo->dqi_flags);
if (!(flags & OLQF_CLEAN))
status = ocfs2_recover_local_quota_file(lqinode,
type,
rec);
/* We don't want to mark file as clean when it is actually
* active */
if (slot_num == osb->slot_num)
goto out_bh;
/* Mark quota file as clean if we are recovering quota file of
* some other node. */
handle = ocfs2_start_trans(osb,
OCFS2_LOCAL_QINFO_WRITE_CREDITS);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto out_bh;
}
status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
lock_buffer(bh);
ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
unlock_buffer(bh);
status = ocfs2_journal_dirty(handle, bh);
if (status < 0)
mlog_errno(status);
out_trans:
ocfs2_commit_trans(osb, handle);
out_bh:
brelse(bh);
out_lock:
ocfs2_inode_unlock(lqinode, 1);
out_put:
iput(lqinode);
if (status < 0)
break;
}
out:
mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
kfree(rec);
return status;
}
/* Read information header from quota file */
static int ocfs2_local_read_info(struct super_block *sb, int type)
{
struct ocfs2_local_disk_dqinfo *ldinfo;
struct mem_dqinfo *info = sb_dqinfo(sb, type);
struct ocfs2_mem_dqinfo *oinfo;
struct inode *lqinode = sb_dqopt(sb)->files[type];
int status;
struct buffer_head *bh = NULL;
struct ocfs2_quota_recovery *rec;
int locked = 0;
/* We don't need the lock and we have to acquire quota file locks
* which will later depend on this lock */
mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
info->dqi_maxblimit = 0x7fffffffffffffffLL;
info->dqi_maxilimit = 0x7fffffffffffffffLL;
oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
if (!oinfo) {
mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
" info.");
goto out_err;
}
info->dqi_priv = oinfo;
oinfo->dqi_type = type;
INIT_LIST_HEAD(&oinfo->dqi_chunk);
oinfo->dqi_rec = NULL;
oinfo->dqi_lqi_bh = NULL;
oinfo->dqi_ibh = NULL;
status = ocfs2_global_read_info(sb, type);
if (status < 0)
goto out_err;
status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
if (status < 0) {
mlog_errno(status);
goto out_err;
}
locked = 1;
/* Now read local header */
status = ocfs2_read_quota_block(lqinode, 0, &bh);
if (status) {
mlog_errno(status);
mlog(ML_ERROR, "failed to read quota file info header "
"(type=%d)\n", type);
goto out_err;
}
ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
OCFS2_LOCAL_INFO_OFF);
info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
oinfo->dqi_ibh = bh;
/* We crashed when using local quota file? */
if (!(info->dqi_flags & OLQF_CLEAN)) {
rec = OCFS2_SB(sb)->quota_rec;
if (!rec) {
rec = ocfs2_alloc_quota_recovery();
if (!rec) {
status = -ENOMEM;
mlog_errno(status);
goto out_err;
}
OCFS2_SB(sb)->quota_rec = rec;
}
status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
&rec->r_list[type]);
if (status < 0) {
mlog_errno(status);
goto out_err;
}
}
status = ocfs2_load_local_quota_bitmaps(lqinode,
ldinfo,
&oinfo->dqi_chunk);
if (status < 0) {
mlog_errno(status);
goto out_err;
}
/* Now mark quota file as used */
info->dqi_flags &= ~OLQF_CLEAN;
status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
if (status < 0) {
mlog_errno(status);
goto out_err;
}
mutex_lock(&sb_dqopt(sb)->dqio_mutex);
return 0;
out_err:
if (oinfo) {
iput(oinfo->dqi_gqinode);
ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
ocfs2_lock_res_free(&oinfo->dqi_gqlock);
brelse(oinfo->dqi_lqi_bh);
if (locked)
ocfs2_inode_unlock(lqinode, 1);
ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
kfree(oinfo);
}
brelse(bh);
mutex_lock(&sb_dqopt(sb)->dqio_mutex);
return -1;
}
/* Write local info to quota file */
static int ocfs2_local_write_info(struct super_block *sb, int type)
{
struct mem_dqinfo *info = sb_dqinfo(sb, type);
struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
->dqi_ibh;
int status;
status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
info);
if (status < 0) {
mlog_errno(status);
return -1;
}
return 0;
}
/* Release info from memory */
static int ocfs2_local_free_info(struct super_block *sb, int type)
{
struct mem_dqinfo *info = sb_dqinfo(sb, type);
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
struct ocfs2_quota_chunk *chunk;
struct ocfs2_local_disk_chunk *dchunk;
int mark_clean = 1, len;
int status;
/* At this point we know there are no more dquots and thus
* even if there's some sync in the pdflush queue, it won't
* find any dquots and return without doing anything */
cancel_delayed_work_sync(&oinfo->dqi_sync_work);
iput(oinfo->dqi_gqinode);
ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
ocfs2_lock_res_free(&oinfo->dqi_gqlock);
list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
dchunk = (struct ocfs2_local_disk_chunk *)
(chunk->qc_headerbh->b_data);
if (chunk->qc_num < oinfo->dqi_chunks - 1) {
len = ol_chunk_entries(sb);
} else {
len = (oinfo->dqi_blocks -
ol_quota_chunk_block(sb, chunk->qc_num) - 1)
* ol_quota_entries_per_block(sb);
}
/* Not all entries free? Bug! */
if (le32_to_cpu(dchunk->dqc_free) != len) {
mlog(ML_ERROR, "releasing quota file with used "
"entries (type=%d)\n", type);
mark_clean = 0;
}
}
ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
/* dqonoff_mutex protects us against racing with recovery thread... */
if (oinfo->dqi_rec) {
ocfs2_free_quota_recovery(oinfo->dqi_rec);
mark_clean = 0;
}
if (!mark_clean)
goto out;
/* Mark local file as clean */
info->dqi_flags |= OLQF_CLEAN;
status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
oinfo->dqi_ibh,
olq_update_info,
info);
if (status < 0) {
mlog_errno(status);
goto out;
}
out:
ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
brelse(oinfo->dqi_ibh);
brelse(oinfo->dqi_lqi_bh);
kfree(oinfo);
return 0;
}
static void olq_set_dquot(struct buffer_head *bh, void *private)
{
struct ocfs2_dquot *od = private;
struct ocfs2_local_disk_dqblk *dqblk;
struct super_block *sb = od->dq_dquot.dq_sb;
dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
+ ol_dqblk_block_offset(sb, od->dq_local_off));
dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
spin_lock(&dq_data_lock);
dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
od->dq_origspace);
dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
od->dq_originodes);
spin_unlock(&dq_data_lock);
mlog(0, "Writing local dquot %u space %lld inodes %lld\n",
od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod),
(long long)le64_to_cpu(dqblk->dqb_inodemod));
}
/* Write dquot to local quota file */
static int ocfs2_local_write_dquot(struct dquot *dquot)
{
struct super_block *sb = dquot->dq_sb;
struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
struct buffer_head *bh = NULL;
int status;
status = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type],
ol_dqblk_file_block(sb, od->dq_local_off),
&bh);
if (status) {
mlog_errno(status);
goto out;
}
status = ocfs2_modify_bh(sb_dqopt(sb)->files[dquot->dq_type], bh,
olq_set_dquot, od);
if (status < 0) {
mlog_errno(status);
goto out;
}
out:
brelse(bh);
return status;
}
/* Find free entry in local quota file */
static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
int type,
int *offset)
{
struct mem_dqinfo *info = sb_dqinfo(sb, type);
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
struct ocfs2_quota_chunk *chunk;
struct ocfs2_local_disk_chunk *dchunk;
int found = 0, len;
list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
dchunk = (struct ocfs2_local_disk_chunk *)
chunk->qc_headerbh->b_data;
if (le32_to_cpu(dchunk->dqc_free) > 0) {
found = 1;
break;
}
}
if (!found)
return NULL;
if (chunk->qc_num < oinfo->dqi_chunks - 1) {
len = ol_chunk_entries(sb);
} else {
len = (oinfo->dqi_blocks -
ol_quota_chunk_block(sb, chunk->qc_num) - 1)
* ol_quota_entries_per_block(sb);
}
found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
/* We failed? */
if (found == len) {
mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
" entries free (type=%d)\n", chunk->qc_num,
le32_to_cpu(dchunk->dqc_free), type);
return ERR_PTR(-EIO);
}
*offset = found;
return chunk;
}
/* Add new chunk to the local quota file */
static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
struct super_block *sb,
int type,
int *offset)
{
struct mem_dqinfo *info = sb_dqinfo(sb, type);
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
struct inode *lqinode = sb_dqopt(sb)->files[type];
struct ocfs2_quota_chunk *chunk = NULL;
struct ocfs2_local_disk_chunk *dchunk;
int status;
handle_t *handle;
struct buffer_head *bh = NULL, *dbh = NULL;
u64 p_blkno;
/* We are protected by dqio_sem so no locking needed */
status = ocfs2_extend_no_holes(lqinode,
lqinode->i_size + 2 * sb->s_blocksize,
lqinode->i_size);
if (status < 0) {
mlog_errno(status);
goto out;
}
status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
lqinode->i_size + 2 * sb->s_blocksize);
if (status < 0) {
mlog_errno(status);
goto out;
}
chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
if (!chunk) {
status = -ENOMEM;
mlog_errno(status);
goto out;
}
/* Local quota info and two new blocks we initialize */
handle = ocfs2_start_trans(OCFS2_SB(sb),
OCFS2_LOCAL_QINFO_WRITE_CREDITS +
2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto out;
}
/* Initialize chunk header */
down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
&p_blkno, NULL, NULL);
up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
bh = sb_getblk(sb, p_blkno);
if (!bh) {
status = -ENOMEM;
mlog_errno(status);
goto out_trans;
}
dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
OCFS2_JOURNAL_ACCESS_CREATE);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
lock_buffer(bh);
dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
memset(dchunk->dqc_bitmap, 0,
sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
OCFS2_QBLK_RESERVED_SPACE);
unlock_buffer(bh);
status = ocfs2_journal_dirty(handle, bh);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
/* Initialize new block with structures */
down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
&p_blkno, NULL, NULL);
up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
dbh = sb_getblk(sb, p_blkno);
if (!dbh) {
status = -ENOMEM;
mlog_errno(status);
goto out_trans;
}
ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
OCFS2_JOURNAL_ACCESS_CREATE);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
lock_buffer(dbh);
memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
unlock_buffer(dbh);
status = ocfs2_journal_dirty(handle, dbh);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
/* Update local quotafile info */
oinfo->dqi_blocks += 2;
oinfo->dqi_chunks++;
status = ocfs2_local_write_info(sb, type);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
if (status < 0) {
mlog_errno(status);
goto out;
}
list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
chunk->qc_num = list_entry(chunk->qc_chunk.prev,
struct ocfs2_quota_chunk,
qc_chunk)->qc_num + 1;
chunk->qc_headerbh = bh;
*offset = 0;
return chunk;
out_trans:
ocfs2_commit_trans(OCFS2_SB(sb), handle);
out:
brelse(bh);
brelse(dbh);
kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
return ERR_PTR(status);
}
/* Find free entry in local quota file */
static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
struct super_block *sb,
int type,
int *offset)
{
struct mem_dqinfo *info = sb_dqinfo(sb, type);
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
struct ocfs2_quota_chunk *chunk;
struct inode *lqinode = sb_dqopt(sb)->files[type];
struct ocfs2_local_disk_chunk *dchunk;
int epb = ol_quota_entries_per_block(sb);
unsigned int chunk_blocks;
struct buffer_head *bh;
u64 p_blkno;
int status;
handle_t *handle;
if (list_empty(&oinfo->dqi_chunk))
return ocfs2_local_quota_add_chunk(sb, type, offset);
/* Is the last chunk full? */
chunk = list_entry(oinfo->dqi_chunk.prev,
struct ocfs2_quota_chunk, qc_chunk);
chunk_blocks = oinfo->dqi_blocks -
ol_quota_chunk_block(sb, chunk->qc_num) - 1;
if (ol_chunk_blocks(sb) == chunk_blocks)
return ocfs2_local_quota_add_chunk(sb, type, offset);
/* We are protected by dqio_sem so no locking needed */
status = ocfs2_extend_no_holes(lqinode,
lqinode->i_size + sb->s_blocksize,
lqinode->i_size);
if (status < 0) {
mlog_errno(status);
goto out;
}
status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
lqinode->i_size + sb->s_blocksize);
if (status < 0) {
mlog_errno(status);
goto out;
}
/* Get buffer from the just added block */
down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
&p_blkno, NULL, NULL);
up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
if (status < 0) {
mlog_errno(status);
goto out;
}
bh = sb_getblk(sb, p_blkno);
if (!bh) {
status = -ENOMEM;
mlog_errno(status);
goto out;
}
ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
/* Local quota info, chunk header and the new block we initialize */
handle = ocfs2_start_trans(OCFS2_SB(sb),
OCFS2_LOCAL_QINFO_WRITE_CREDITS +
2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto out;
}
/* Zero created block */
status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
OCFS2_JOURNAL_ACCESS_CREATE);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
lock_buffer(bh);
memset(bh->b_data, 0, sb->s_blocksize);
unlock_buffer(bh);
status = ocfs2_journal_dirty(handle, bh);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
/* Update chunk header */
status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
chunk->qc_headerbh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
lock_buffer(chunk->qc_headerbh);
le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
unlock_buffer(chunk->qc_headerbh);
status = ocfs2_journal_dirty(handle, chunk->qc_headerbh);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
/* Update file header */
oinfo->dqi_blocks++;
status = ocfs2_local_write_info(sb, type);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
if (status < 0) {
mlog_errno(status);
goto out;
}
*offset = chunk_blocks * epb;
return chunk;
out_trans:
ocfs2_commit_trans(OCFS2_SB(sb), handle);
out:
return ERR_PTR(status);
}
static void olq_alloc_dquot(struct buffer_head *bh, void *private)
{
int *offset = private;
struct ocfs2_local_disk_chunk *dchunk;
dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
le32_add_cpu(&dchunk->dqc_free, -1);
}
/* Create dquot in the local file for given id */
static int ocfs2_create_local_dquot(struct dquot *dquot)
{
struct super_block *sb = dquot->dq_sb;
int type = dquot->dq_type;
struct inode *lqinode = sb_dqopt(sb)->files[type];
struct ocfs2_quota_chunk *chunk;
struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
int offset;
int status;
chunk = ocfs2_find_free_entry(sb, type, &offset);
if (!chunk) {
chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
if (IS_ERR(chunk))
return PTR_ERR(chunk);
} else if (IS_ERR(chunk)) {
return PTR_ERR(chunk);
}
od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
od->dq_chunk = chunk;
/* Initialize dquot structure on disk */
status = ocfs2_local_write_dquot(dquot);
if (status < 0) {
mlog_errno(status);
goto out;
}
/* Mark structure as allocated */
status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
&offset);
if (status < 0) {
mlog_errno(status);
goto out;
}
out:
return status;
}
/* Create entry in local file for dquot, load data from the global file */
static int ocfs2_local_read_dquot(struct dquot *dquot)
{
int status;
mlog_entry("id=%u, type=%d\n", dquot->dq_id, dquot->dq_type);
status = ocfs2_global_read_dquot(dquot);
if (status < 0) {
mlog_errno(status);
goto out_err;
}
/* Now create entry in the local quota file */
status = ocfs2_create_local_dquot(dquot);
if (status < 0) {
mlog_errno(status);
goto out_err;
}
mlog_exit(0);
return 0;
out_err:
mlog_exit(status);
return status;
}
/* Release dquot structure from local quota file. ocfs2_release_dquot() has
* already started a transaction and obtained exclusive lock for global
* quota file. */
static int ocfs2_local_release_dquot(struct dquot *dquot)
{
int status;
int type = dquot->dq_type;
struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
struct super_block *sb = dquot->dq_sb;
struct ocfs2_local_disk_chunk *dchunk;
int offset;
handle_t *handle = journal_current_handle();
BUG_ON(!handle);
/* First write all local changes to global file */
status = ocfs2_global_release_dquot(dquot);
if (status < 0) {
mlog_errno(status);
goto out;
}
status = ocfs2_journal_access_dq(handle,
INODE_CACHE(sb_dqopt(sb)->files[type]),
od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto out;
}
offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
od->dq_local_off);
dchunk = (struct ocfs2_local_disk_chunk *)
(od->dq_chunk->qc_headerbh->b_data);
/* Mark structure as freed */
lock_buffer(od->dq_chunk->qc_headerbh);
ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
le32_add_cpu(&dchunk->dqc_free, 1);
unlock_buffer(od->dq_chunk->qc_headerbh);
status = ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
if (status < 0) {
mlog_errno(status);
goto out;
}
status = 0;
out:
/* Clear the read bit so that next time someone uses this
* dquot he reads fresh info from disk and allocates local
* dquot structure */
clear_bit(DQ_READ_B, &dquot->dq_flags);
return status;
}
static const struct quota_format_ops ocfs2_format_ops = {
.check_quota_file = ocfs2_local_check_quota_file,
.read_file_info = ocfs2_local_read_info,
.write_file_info = ocfs2_global_write_info,
.free_file_info = ocfs2_local_free_info,
.read_dqblk = ocfs2_local_read_dquot,
.commit_dqblk = ocfs2_local_write_dquot,
.release_dqblk = ocfs2_local_release_dquot,
};
struct quota_format_type ocfs2_quota_format = {
.qf_fmt_id = QFMT_OCFS2,
.qf_ops = &ocfs2_format_ops,
.qf_owner = THIS_MODULE
};
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