1005 lines
28 KiB
C
1005 lines
28 KiB
C
/*
|
|
* Implementation of operations over global quota file
|
|
*/
|
|
#include <linux/spinlock.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/quota.h>
|
|
#include <linux/quotaops.h>
|
|
#include <linux/dqblk_qtree.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/writeback.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#define MLOG_MASK_PREFIX ML_QUOTA
|
|
#include <cluster/masklog.h>
|
|
|
|
#include "ocfs2_fs.h"
|
|
#include "ocfs2.h"
|
|
#include "alloc.h"
|
|
#include "inode.h"
|
|
#include "journal.h"
|
|
#include "file.h"
|
|
#include "sysfile.h"
|
|
#include "dlmglue.h"
|
|
#include "uptodate.h"
|
|
#include "quota.h"
|
|
|
|
static struct workqueue_struct *ocfs2_quota_wq = NULL;
|
|
|
|
static void qsync_work_fn(struct work_struct *work);
|
|
|
|
static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp)
|
|
{
|
|
struct ocfs2_global_disk_dqblk *d = dp;
|
|
struct mem_dqblk *m = &dquot->dq_dqb;
|
|
|
|
/* Update from disk only entries not set by the admin */
|
|
if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) {
|
|
m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
|
|
m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
|
|
}
|
|
if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
|
|
m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
|
|
if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) {
|
|
m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit);
|
|
m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit);
|
|
}
|
|
if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
|
|
m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
|
|
if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags))
|
|
m->dqb_btime = le64_to_cpu(d->dqb_btime);
|
|
if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags))
|
|
m->dqb_itime = le64_to_cpu(d->dqb_itime);
|
|
OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count);
|
|
}
|
|
|
|
static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot)
|
|
{
|
|
struct ocfs2_global_disk_dqblk *d = dp;
|
|
struct mem_dqblk *m = &dquot->dq_dqb;
|
|
|
|
d->dqb_id = cpu_to_le32(dquot->dq_id);
|
|
d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count);
|
|
d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
|
|
d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
|
|
d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
|
|
d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit);
|
|
d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit);
|
|
d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
|
|
d->dqb_btime = cpu_to_le64(m->dqb_btime);
|
|
d->dqb_itime = cpu_to_le64(m->dqb_itime);
|
|
}
|
|
|
|
static int ocfs2_global_is_id(void *dp, struct dquot *dquot)
|
|
{
|
|
struct ocfs2_global_disk_dqblk *d = dp;
|
|
struct ocfs2_mem_dqinfo *oinfo =
|
|
sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
|
|
|
|
if (qtree_entry_unused(&oinfo->dqi_gi, dp))
|
|
return 0;
|
|
return le32_to_cpu(d->dqb_id) == dquot->dq_id;
|
|
}
|
|
|
|
struct qtree_fmt_operations ocfs2_global_ops = {
|
|
.mem2disk_dqblk = ocfs2_global_mem2diskdqb,
|
|
.disk2mem_dqblk = ocfs2_global_disk2memdqb,
|
|
.is_id = ocfs2_global_is_id,
|
|
};
|
|
|
|
int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
|
|
struct buffer_head **bh)
|
|
{
|
|
int rc = 0;
|
|
struct buffer_head *tmp = *bh;
|
|
|
|
rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0, NULL);
|
|
if (rc)
|
|
mlog_errno(rc);
|
|
|
|
/* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
|
|
if (!rc && !*bh)
|
|
*bh = tmp;
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int ocfs2_get_quota_block(struct inode *inode, int block,
|
|
struct buffer_head **bh)
|
|
{
|
|
u64 pblock, pcount;
|
|
int err;
|
|
|
|
down_read(&OCFS2_I(inode)->ip_alloc_sem);
|
|
err = ocfs2_extent_map_get_blocks(inode, block, &pblock, &pcount, NULL);
|
|
up_read(&OCFS2_I(inode)->ip_alloc_sem);
|
|
if (err) {
|
|
mlog_errno(err);
|
|
return err;
|
|
}
|
|
*bh = sb_getblk(inode->i_sb, pblock);
|
|
if (!*bh) {
|
|
err = -EIO;
|
|
mlog_errno(err);
|
|
}
|
|
return err;;
|
|
}
|
|
|
|
/* Read data from global quotafile - avoid pagecache and such because we cannot
|
|
* afford acquiring the locks... We use quota cluster lock to serialize
|
|
* operations. Caller is responsible for acquiring it. */
|
|
ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
|
|
size_t len, loff_t off)
|
|
{
|
|
struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
|
|
struct inode *gqinode = oinfo->dqi_gqinode;
|
|
loff_t i_size = i_size_read(gqinode);
|
|
int offset = off & (sb->s_blocksize - 1);
|
|
sector_t blk = off >> sb->s_blocksize_bits;
|
|
int err = 0;
|
|
struct buffer_head *bh;
|
|
size_t toread, tocopy;
|
|
|
|
if (off > i_size)
|
|
return 0;
|
|
if (off + len > i_size)
|
|
len = i_size - off;
|
|
toread = len;
|
|
while (toread > 0) {
|
|
tocopy = min((size_t)(sb->s_blocksize - offset), toread);
|
|
bh = NULL;
|
|
err = ocfs2_read_quota_block(gqinode, blk, &bh);
|
|
if (err) {
|
|
mlog_errno(err);
|
|
return err;
|
|
}
|
|
memcpy(data, bh->b_data + offset, tocopy);
|
|
brelse(bh);
|
|
offset = 0;
|
|
toread -= tocopy;
|
|
data += tocopy;
|
|
blk++;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/* Write to quotafile (we know the transaction is already started and has
|
|
* enough credits) */
|
|
ssize_t ocfs2_quota_write(struct super_block *sb, int type,
|
|
const char *data, size_t len, loff_t off)
|
|
{
|
|
struct mem_dqinfo *info = sb_dqinfo(sb, type);
|
|
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
|
|
struct inode *gqinode = oinfo->dqi_gqinode;
|
|
int offset = off & (sb->s_blocksize - 1);
|
|
sector_t blk = off >> sb->s_blocksize_bits;
|
|
int err = 0, new = 0, ja_type;
|
|
struct buffer_head *bh = NULL;
|
|
handle_t *handle = journal_current_handle();
|
|
|
|
if (!handle) {
|
|
mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
|
|
"because transaction was not started.\n",
|
|
(unsigned long long)off, (unsigned long long)len);
|
|
return -EIO;
|
|
}
|
|
if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
|
|
WARN_ON(1);
|
|
len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
|
|
}
|
|
|
|
mutex_lock_nested(&gqinode->i_mutex, I_MUTEX_QUOTA);
|
|
if (gqinode->i_size < off + len) {
|
|
down_write(&OCFS2_I(gqinode)->ip_alloc_sem);
|
|
err = ocfs2_extend_no_holes(gqinode, off + len, off);
|
|
up_write(&OCFS2_I(gqinode)->ip_alloc_sem);
|
|
if (err < 0)
|
|
goto out;
|
|
err = ocfs2_simple_size_update(gqinode,
|
|
oinfo->dqi_gqi_bh,
|
|
off + len);
|
|
if (err < 0)
|
|
goto out;
|
|
new = 1;
|
|
}
|
|
/* Not rewriting whole block? */
|
|
if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
|
|
!new) {
|
|
err = ocfs2_read_quota_block(gqinode, blk, &bh);
|
|
ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
|
|
} else {
|
|
err = ocfs2_get_quota_block(gqinode, blk, &bh);
|
|
ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
|
|
}
|
|
if (err) {
|
|
mlog_errno(err);
|
|
return err;
|
|
}
|
|
lock_buffer(bh);
|
|
if (new)
|
|
memset(bh->b_data, 0, sb->s_blocksize);
|
|
memcpy(bh->b_data + offset, data, len);
|
|
flush_dcache_page(bh->b_page);
|
|
set_buffer_uptodate(bh);
|
|
unlock_buffer(bh);
|
|
ocfs2_set_buffer_uptodate(gqinode, bh);
|
|
err = ocfs2_journal_access(handle, gqinode, bh, ja_type);
|
|
if (err < 0) {
|
|
brelse(bh);
|
|
goto out;
|
|
}
|
|
err = ocfs2_journal_dirty(handle, bh);
|
|
brelse(bh);
|
|
if (err < 0)
|
|
goto out;
|
|
out:
|
|
if (err) {
|
|
mutex_unlock(&gqinode->i_mutex);
|
|
mlog_errno(err);
|
|
return err;
|
|
}
|
|
gqinode->i_version++;
|
|
ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
|
|
mutex_unlock(&gqinode->i_mutex);
|
|
return len;
|
|
}
|
|
|
|
int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
|
|
{
|
|
int status;
|
|
struct buffer_head *bh = NULL;
|
|
|
|
status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
|
|
if (status < 0)
|
|
return status;
|
|
spin_lock(&dq_data_lock);
|
|
if (!oinfo->dqi_gqi_count++)
|
|
oinfo->dqi_gqi_bh = bh;
|
|
else
|
|
WARN_ON(bh != oinfo->dqi_gqi_bh);
|
|
spin_unlock(&dq_data_lock);
|
|
return 0;
|
|
}
|
|
|
|
void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
|
|
{
|
|
ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
|
|
brelse(oinfo->dqi_gqi_bh);
|
|
spin_lock(&dq_data_lock);
|
|
if (!--oinfo->dqi_gqi_count)
|
|
oinfo->dqi_gqi_bh = NULL;
|
|
spin_unlock(&dq_data_lock);
|
|
}
|
|
|
|
/* Read information header from global quota file */
|
|
int ocfs2_global_read_info(struct super_block *sb, int type)
|
|
{
|
|
struct inode *gqinode = NULL;
|
|
unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
|
|
GROUP_QUOTA_SYSTEM_INODE };
|
|
struct ocfs2_global_disk_dqinfo dinfo;
|
|
struct mem_dqinfo *info = sb_dqinfo(sb, type);
|
|
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
|
|
int status;
|
|
|
|
mlog_entry_void();
|
|
|
|
/* Read global header */
|
|
gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
|
|
OCFS2_INVALID_SLOT);
|
|
if (!gqinode) {
|
|
mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n",
|
|
type);
|
|
status = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
oinfo->dqi_gi.dqi_sb = sb;
|
|
oinfo->dqi_gi.dqi_type = type;
|
|
ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
|
|
oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
|
|
oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
|
|
oinfo->dqi_gqi_bh = NULL;
|
|
oinfo->dqi_gqi_count = 0;
|
|
oinfo->dqi_gqinode = gqinode;
|
|
status = ocfs2_lock_global_qf(oinfo, 0);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto out_err;
|
|
}
|
|
status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
|
|
sizeof(struct ocfs2_global_disk_dqinfo),
|
|
OCFS2_GLOBAL_INFO_OFF);
|
|
ocfs2_unlock_global_qf(oinfo, 0);
|
|
if (status != sizeof(struct ocfs2_global_disk_dqinfo)) {
|
|
mlog(ML_ERROR, "Cannot read global quota info (%d).\n",
|
|
status);
|
|
if (status >= 0)
|
|
status = -EIO;
|
|
mlog_errno(status);
|
|
goto out_err;
|
|
}
|
|
info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
|
|
info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
|
|
oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms);
|
|
oinfo->dqi_syncjiff = msecs_to_jiffies(oinfo->dqi_syncms);
|
|
oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
|
|
oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
|
|
oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
|
|
oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits;
|
|
oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize -
|
|
OCFS2_QBLK_RESERVED_SPACE;
|
|
oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
|
|
INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn);
|
|
queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work,
|
|
oinfo->dqi_syncjiff);
|
|
|
|
out_err:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/* Write information to global quota file. Expects exlusive lock on quota
|
|
* file inode and quota info */
|
|
static int __ocfs2_global_write_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_global_disk_dqinfo dinfo;
|
|
ssize_t size;
|
|
|
|
spin_lock(&dq_data_lock);
|
|
info->dqi_flags &= ~DQF_INFO_DIRTY;
|
|
dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
|
|
dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
|
|
spin_unlock(&dq_data_lock);
|
|
dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms);
|
|
dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks);
|
|
dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk);
|
|
dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry);
|
|
size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
|
|
sizeof(struct ocfs2_global_disk_dqinfo),
|
|
OCFS2_GLOBAL_INFO_OFF);
|
|
if (size != sizeof(struct ocfs2_global_disk_dqinfo)) {
|
|
mlog(ML_ERROR, "Cannot write global quota info structure\n");
|
|
if (size >= 0)
|
|
size = -EIO;
|
|
return size;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ocfs2_global_write_info(struct super_block *sb, int type)
|
|
{
|
|
int err;
|
|
struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
|
|
|
|
err = ocfs2_qinfo_lock(info, 1);
|
|
if (err < 0)
|
|
return err;
|
|
err = __ocfs2_global_write_info(sb, type);
|
|
ocfs2_qinfo_unlock(info, 1);
|
|
return err;
|
|
}
|
|
|
|
/* Read in information from global quota file and acquire a reference to it.
|
|
* dquot_acquire() has already started the transaction and locked quota file */
|
|
int ocfs2_global_read_dquot(struct dquot *dquot)
|
|
{
|
|
int err, err2, ex = 0;
|
|
struct ocfs2_mem_dqinfo *info =
|
|
sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
|
|
|
|
err = ocfs2_qinfo_lock(info, 0);
|
|
if (err < 0)
|
|
goto out;
|
|
err = qtree_read_dquot(&info->dqi_gi, dquot);
|
|
if (err < 0)
|
|
goto out_qlock;
|
|
OCFS2_DQUOT(dquot)->dq_use_count++;
|
|
OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
|
|
OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
|
|
if (!dquot->dq_off) { /* No real quota entry? */
|
|
/* Upgrade to exclusive lock for allocation */
|
|
err = ocfs2_qinfo_lock(info, 1);
|
|
if (err < 0)
|
|
goto out_qlock;
|
|
ex = 1;
|
|
}
|
|
err = qtree_write_dquot(&info->dqi_gi, dquot);
|
|
if (ex && info_dirty(sb_dqinfo(dquot->dq_sb, dquot->dq_type))) {
|
|
err2 = __ocfs2_global_write_info(dquot->dq_sb, dquot->dq_type);
|
|
if (!err)
|
|
err = err2;
|
|
}
|
|
out_qlock:
|
|
if (ex)
|
|
ocfs2_qinfo_unlock(info, 1);
|
|
ocfs2_qinfo_unlock(info, 0);
|
|
out:
|
|
if (err < 0)
|
|
mlog_errno(err);
|
|
return err;
|
|
}
|
|
|
|
/* Sync local information about quota modifications with global quota file.
|
|
* Caller must have started the transaction and obtained exclusive lock for
|
|
* global quota file inode */
|
|
int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
|
|
{
|
|
int err, err2;
|
|
struct super_block *sb = dquot->dq_sb;
|
|
int type = dquot->dq_type;
|
|
struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
|
|
struct ocfs2_global_disk_dqblk dqblk;
|
|
s64 spacechange, inodechange;
|
|
time_t olditime, oldbtime;
|
|
|
|
err = sb->s_op->quota_read(sb, type, (char *)&dqblk,
|
|
sizeof(struct ocfs2_global_disk_dqblk),
|
|
dquot->dq_off);
|
|
if (err != sizeof(struct ocfs2_global_disk_dqblk)) {
|
|
if (err >= 0) {
|
|
mlog(ML_ERROR, "Short read from global quota file "
|
|
"(%u read)\n", err);
|
|
err = -EIO;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
/* Update space and inode usage. Get also other information from
|
|
* global quota file so that we don't overwrite any changes there.
|
|
* We are */
|
|
spin_lock(&dq_data_lock);
|
|
spacechange = dquot->dq_dqb.dqb_curspace -
|
|
OCFS2_DQUOT(dquot)->dq_origspace;
|
|
inodechange = dquot->dq_dqb.dqb_curinodes -
|
|
OCFS2_DQUOT(dquot)->dq_originodes;
|
|
olditime = dquot->dq_dqb.dqb_itime;
|
|
oldbtime = dquot->dq_dqb.dqb_btime;
|
|
ocfs2_global_disk2memdqb(dquot, &dqblk);
|
|
mlog(0, "Syncing global dquot %u space %lld+%lld, inodes %lld+%lld\n",
|
|
dquot->dq_id, dquot->dq_dqb.dqb_curspace, (long long)spacechange,
|
|
dquot->dq_dqb.dqb_curinodes, (long long)inodechange);
|
|
if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
|
|
dquot->dq_dqb.dqb_curspace += spacechange;
|
|
if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
|
|
dquot->dq_dqb.dqb_curinodes += inodechange;
|
|
/* Set properly space grace time... */
|
|
if (dquot->dq_dqb.dqb_bsoftlimit &&
|
|
dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) {
|
|
if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) &&
|
|
oldbtime > 0) {
|
|
if (dquot->dq_dqb.dqb_btime > 0)
|
|
dquot->dq_dqb.dqb_btime =
|
|
min(dquot->dq_dqb.dqb_btime, oldbtime);
|
|
else
|
|
dquot->dq_dqb.dqb_btime = oldbtime;
|
|
}
|
|
} else {
|
|
dquot->dq_dqb.dqb_btime = 0;
|
|
clear_bit(DQ_BLKS_B, &dquot->dq_flags);
|
|
}
|
|
/* Set properly inode grace time... */
|
|
if (dquot->dq_dqb.dqb_isoftlimit &&
|
|
dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) {
|
|
if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) &&
|
|
olditime > 0) {
|
|
if (dquot->dq_dqb.dqb_itime > 0)
|
|
dquot->dq_dqb.dqb_itime =
|
|
min(dquot->dq_dqb.dqb_itime, olditime);
|
|
else
|
|
dquot->dq_dqb.dqb_itime = olditime;
|
|
}
|
|
} else {
|
|
dquot->dq_dqb.dqb_itime = 0;
|
|
clear_bit(DQ_INODES_B, &dquot->dq_flags);
|
|
}
|
|
/* All information is properly updated, clear the flags */
|
|
__clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
|
|
__clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
|
|
__clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
|
|
__clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
|
|
__clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
|
|
__clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
|
|
OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
|
|
OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
|
|
spin_unlock(&dq_data_lock);
|
|
err = ocfs2_qinfo_lock(info, freeing);
|
|
if (err < 0) {
|
|
mlog(ML_ERROR, "Failed to lock quota info, loosing quota write"
|
|
" (type=%d, id=%u)\n", dquot->dq_type,
|
|
(unsigned)dquot->dq_id);
|
|
goto out;
|
|
}
|
|
if (freeing)
|
|
OCFS2_DQUOT(dquot)->dq_use_count--;
|
|
err = qtree_write_dquot(&info->dqi_gi, dquot);
|
|
if (err < 0)
|
|
goto out_qlock;
|
|
if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) {
|
|
err = qtree_release_dquot(&info->dqi_gi, dquot);
|
|
if (info_dirty(sb_dqinfo(sb, type))) {
|
|
err2 = __ocfs2_global_write_info(sb, type);
|
|
if (!err)
|
|
err = err2;
|
|
}
|
|
}
|
|
out_qlock:
|
|
ocfs2_qinfo_unlock(info, freeing);
|
|
out:
|
|
if (err < 0)
|
|
mlog_errno(err);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Functions for periodic syncing of dquots with global file
|
|
*/
|
|
static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
|
|
{
|
|
handle_t *handle;
|
|
struct super_block *sb = dquot->dq_sb;
|
|
struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
|
|
struct ocfs2_super *osb = OCFS2_SB(sb);
|
|
int status = 0;
|
|
|
|
mlog_entry("id=%u qtype=%u type=%lu device=%s\n", dquot->dq_id,
|
|
dquot->dq_type, type, sb->s_id);
|
|
if (type != dquot->dq_type)
|
|
goto out;
|
|
status = ocfs2_lock_global_qf(oinfo, 1);
|
|
if (status < 0)
|
|
goto out;
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto out_ilock;
|
|
}
|
|
mutex_lock(&sb_dqopt(sb)->dqio_mutex);
|
|
status = ocfs2_sync_dquot(dquot);
|
|
mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
/* We have to write local structure as well... */
|
|
dquot_mark_dquot_dirty(dquot);
|
|
status = dquot_commit(dquot);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
ocfs2_commit_trans(osb, handle);
|
|
out_ilock:
|
|
ocfs2_unlock_global_qf(oinfo, 1);
|
|
out:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
static void qsync_work_fn(struct work_struct *work)
|
|
{
|
|
struct ocfs2_mem_dqinfo *oinfo = container_of(work,
|
|
struct ocfs2_mem_dqinfo,
|
|
dqi_sync_work.work);
|
|
struct super_block *sb = oinfo->dqi_gqinode->i_sb;
|
|
|
|
dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type);
|
|
queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work,
|
|
oinfo->dqi_syncjiff);
|
|
}
|
|
|
|
/*
|
|
* Wrappers for generic quota functions
|
|
*/
|
|
|
|
static int ocfs2_write_dquot(struct dquot *dquot)
|
|
{
|
|
handle_t *handle;
|
|
struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
|
|
int status = 0;
|
|
|
|
mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto out;
|
|
}
|
|
status = dquot_commit(dquot);
|
|
ocfs2_commit_trans(osb, handle);
|
|
out:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
|
|
{
|
|
struct ocfs2_mem_dqinfo *oinfo;
|
|
int features[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
|
|
OCFS2_FEATURE_RO_COMPAT_GRPQUOTA };
|
|
|
|
if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, features[type]))
|
|
return 0;
|
|
|
|
oinfo = sb_dqinfo(sb, type)->dqi_priv;
|
|
/* We modify tree, leaf block, global info, local chunk header,
|
|
* global and local inode */
|
|
return oinfo->dqi_gi.dqi_qtree_depth + 2 + 1 +
|
|
2 * OCFS2_INODE_UPDATE_CREDITS;
|
|
}
|
|
|
|
static int ocfs2_release_dquot(struct dquot *dquot)
|
|
{
|
|
handle_t *handle;
|
|
struct ocfs2_mem_dqinfo *oinfo =
|
|
sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
|
|
struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
|
|
int status = 0;
|
|
|
|
mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
|
|
|
|
status = ocfs2_lock_global_qf(oinfo, 1);
|
|
if (status < 0)
|
|
goto out;
|
|
handle = ocfs2_start_trans(osb,
|
|
ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type));
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto out_ilock;
|
|
}
|
|
status = dquot_release(dquot);
|
|
ocfs2_commit_trans(osb, handle);
|
|
out_ilock:
|
|
ocfs2_unlock_global_qf(oinfo, 1);
|
|
out:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_calc_qinit_credits(struct super_block *sb, int type)
|
|
{
|
|
struct ocfs2_mem_dqinfo *oinfo;
|
|
int features[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
|
|
OCFS2_FEATURE_RO_COMPAT_GRPQUOTA };
|
|
struct ocfs2_dinode *lfe, *gfe;
|
|
|
|
if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, features[type]))
|
|
return 0;
|
|
|
|
oinfo = sb_dqinfo(sb, type)->dqi_priv;
|
|
gfe = (struct ocfs2_dinode *)oinfo->dqi_gqi_bh->b_data;
|
|
lfe = (struct ocfs2_dinode *)oinfo->dqi_lqi_bh->b_data;
|
|
/* We can extend local file + global file. In local file we
|
|
* can modify info, chunk header block and dquot block. In
|
|
* global file we can modify info, tree and leaf block */
|
|
return ocfs2_calc_extend_credits(sb, &lfe->id2.i_list, 0) +
|
|
ocfs2_calc_extend_credits(sb, &gfe->id2.i_list, 0) +
|
|
3 + oinfo->dqi_gi.dqi_qtree_depth + 2;
|
|
}
|
|
|
|
static int ocfs2_acquire_dquot(struct dquot *dquot)
|
|
{
|
|
handle_t *handle;
|
|
struct ocfs2_mem_dqinfo *oinfo =
|
|
sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
|
|
struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
|
|
int status = 0;
|
|
|
|
mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
|
|
/* We need an exclusive lock, because we're going to update use count
|
|
* and instantiate possibly new dquot structure */
|
|
status = ocfs2_lock_global_qf(oinfo, 1);
|
|
if (status < 0)
|
|
goto out;
|
|
handle = ocfs2_start_trans(osb,
|
|
ocfs2_calc_qinit_credits(dquot->dq_sb, dquot->dq_type));
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto out_ilock;
|
|
}
|
|
status = dquot_acquire(dquot);
|
|
ocfs2_commit_trans(osb, handle);
|
|
out_ilock:
|
|
ocfs2_unlock_global_qf(oinfo, 1);
|
|
out:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
|
|
{
|
|
unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) |
|
|
(1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) |
|
|
(1 << (DQ_LASTSET_B + QIF_INODES_B)) |
|
|
(1 << (DQ_LASTSET_B + QIF_SPACE_B)) |
|
|
(1 << (DQ_LASTSET_B + QIF_BTIME_B)) |
|
|
(1 << (DQ_LASTSET_B + QIF_ITIME_B));
|
|
int sync = 0;
|
|
int status;
|
|
struct super_block *sb = dquot->dq_sb;
|
|
int type = dquot->dq_type;
|
|
struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
|
|
handle_t *handle;
|
|
struct ocfs2_super *osb = OCFS2_SB(sb);
|
|
|
|
mlog_entry("id=%u, type=%d", dquot->dq_id, type);
|
|
dquot_mark_dquot_dirty(dquot);
|
|
|
|
/* In case user set some limits, sync dquot immediately to global
|
|
* quota file so that information propagates quicker */
|
|
spin_lock(&dq_data_lock);
|
|
if (dquot->dq_flags & mask)
|
|
sync = 1;
|
|
spin_unlock(&dq_data_lock);
|
|
if (!sync) {
|
|
status = ocfs2_write_dquot(dquot);
|
|
goto out;
|
|
}
|
|
status = ocfs2_lock_global_qf(oinfo, 1);
|
|
if (status < 0)
|
|
goto out;
|
|
handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto out_ilock;
|
|
}
|
|
status = ocfs2_sync_dquot(dquot);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto out_trans;
|
|
}
|
|
/* Now write updated local dquot structure */
|
|
status = dquot_commit(dquot);
|
|
out_trans:
|
|
ocfs2_commit_trans(osb, handle);
|
|
out_ilock:
|
|
ocfs2_unlock_global_qf(oinfo, 1);
|
|
out:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/* This should happen only after set_dqinfo(). */
|
|
static int ocfs2_write_info(struct super_block *sb, int type)
|
|
{
|
|
handle_t *handle;
|
|
int status = 0;
|
|
struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
|
|
|
|
mlog_entry_void();
|
|
|
|
status = ocfs2_lock_global_qf(oinfo, 1);
|
|
if (status < 0)
|
|
goto out;
|
|
handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto out_ilock;
|
|
}
|
|
status = dquot_commit_info(sb, type);
|
|
ocfs2_commit_trans(OCFS2_SB(sb), handle);
|
|
out_ilock:
|
|
ocfs2_unlock_global_qf(oinfo, 1);
|
|
out:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/* This is difficult. We have to lock quota inode and start transaction
|
|
* in this function but we don't want to take the penalty of exlusive
|
|
* quota file lock when we are just going to use cached structures. So
|
|
* we just take read lock check whether we have dquot cached and if so,
|
|
* we don't have to take the write lock... */
|
|
static int ocfs2_dquot_initialize(struct inode *inode, int type)
|
|
{
|
|
handle_t *handle = NULL;
|
|
int status = 0;
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ocfs2_mem_dqinfo *oinfo;
|
|
int exclusive = 0;
|
|
int cnt;
|
|
qid_t id;
|
|
|
|
mlog_entry_void();
|
|
|
|
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
|
|
if (type != -1 && cnt != type)
|
|
continue;
|
|
if (!sb_has_quota_active(sb, cnt))
|
|
continue;
|
|
oinfo = sb_dqinfo(sb, cnt)->dqi_priv;
|
|
status = ocfs2_lock_global_qf(oinfo, 0);
|
|
if (status < 0)
|
|
goto out;
|
|
/* This is just a performance optimization not a reliable test.
|
|
* Since we hold an inode lock, noone can actually release
|
|
* the structure until we are finished with initialization. */
|
|
if (inode->i_dquot[cnt] != NODQUOT) {
|
|
ocfs2_unlock_global_qf(oinfo, 0);
|
|
continue;
|
|
}
|
|
/* When we have inode lock, we know that no dquot_release() can
|
|
* run and thus we can safely check whether we need to
|
|
* read+modify global file to get quota information or whether
|
|
* our node already has it. */
|
|
if (cnt == USRQUOTA)
|
|
id = inode->i_uid;
|
|
else if (cnt == GRPQUOTA)
|
|
id = inode->i_gid;
|
|
else
|
|
BUG();
|
|
/* Obtain exclusion from quota off... */
|
|
down_write(&sb_dqopt(sb)->dqptr_sem);
|
|
exclusive = !dquot_is_cached(sb, id, cnt);
|
|
up_write(&sb_dqopt(sb)->dqptr_sem);
|
|
if (exclusive) {
|
|
status = ocfs2_lock_global_qf(oinfo, 1);
|
|
if (status < 0) {
|
|
exclusive = 0;
|
|
mlog_errno(status);
|
|
goto out_ilock;
|
|
}
|
|
handle = ocfs2_start_trans(OCFS2_SB(sb),
|
|
ocfs2_calc_qinit_credits(sb, cnt));
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto out_ilock;
|
|
}
|
|
}
|
|
dquot_initialize(inode, cnt);
|
|
if (exclusive) {
|
|
ocfs2_commit_trans(OCFS2_SB(sb), handle);
|
|
ocfs2_unlock_global_qf(oinfo, 1);
|
|
}
|
|
ocfs2_unlock_global_qf(oinfo, 0);
|
|
}
|
|
mlog_exit(0);
|
|
return 0;
|
|
out_ilock:
|
|
if (exclusive)
|
|
ocfs2_unlock_global_qf(oinfo, 1);
|
|
ocfs2_unlock_global_qf(oinfo, 0);
|
|
out:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_dquot_drop_slow(struct inode *inode)
|
|
{
|
|
int status = 0;
|
|
int cnt;
|
|
int got_lock[MAXQUOTAS] = {0, 0};
|
|
handle_t *handle;
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ocfs2_mem_dqinfo *oinfo;
|
|
|
|
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
|
|
if (!sb_has_quota_active(sb, cnt))
|
|
continue;
|
|
oinfo = sb_dqinfo(sb, cnt)->dqi_priv;
|
|
status = ocfs2_lock_global_qf(oinfo, 1);
|
|
if (status < 0)
|
|
goto out;
|
|
got_lock[cnt] = 1;
|
|
}
|
|
handle = ocfs2_start_trans(OCFS2_SB(sb),
|
|
ocfs2_calc_qinit_credits(sb, USRQUOTA) +
|
|
ocfs2_calc_qinit_credits(sb, GRPQUOTA));
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto out;
|
|
}
|
|
dquot_drop(inode);
|
|
ocfs2_commit_trans(OCFS2_SB(sb), handle);
|
|
out:
|
|
for (cnt = 0; cnt < MAXQUOTAS; cnt++)
|
|
if (got_lock[cnt]) {
|
|
oinfo = sb_dqinfo(sb, cnt)->dqi_priv;
|
|
ocfs2_unlock_global_qf(oinfo, 1);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
/* See the comment before ocfs2_dquot_initialize. */
|
|
static int ocfs2_dquot_drop(struct inode *inode)
|
|
{
|
|
int status = 0;
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ocfs2_mem_dqinfo *oinfo;
|
|
int exclusive = 0;
|
|
int cnt;
|
|
int got_lock[MAXQUOTAS] = {0, 0};
|
|
|
|
mlog_entry_void();
|
|
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
|
|
if (!sb_has_quota_active(sb, cnt))
|
|
continue;
|
|
oinfo = sb_dqinfo(sb, cnt)->dqi_priv;
|
|
status = ocfs2_lock_global_qf(oinfo, 0);
|
|
if (status < 0)
|
|
goto out;
|
|
got_lock[cnt] = 1;
|
|
}
|
|
/* Lock against anyone releasing references so that when when we check
|
|
* we know we are not going to be last ones to release dquot */
|
|
down_write(&sb_dqopt(sb)->dqptr_sem);
|
|
/* Urgh, this is a terrible hack :( */
|
|
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
|
|
if (inode->i_dquot[cnt] != NODQUOT &&
|
|
atomic_read(&inode->i_dquot[cnt]->dq_count) > 1) {
|
|
exclusive = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!exclusive)
|
|
dquot_drop_locked(inode);
|
|
up_write(&sb_dqopt(sb)->dqptr_sem);
|
|
out:
|
|
for (cnt = 0; cnt < MAXQUOTAS; cnt++)
|
|
if (got_lock[cnt]) {
|
|
oinfo = sb_dqinfo(sb, cnt)->dqi_priv;
|
|
ocfs2_unlock_global_qf(oinfo, 0);
|
|
}
|
|
/* In case we bailed out because we had to do expensive locking
|
|
* do it now... */
|
|
if (exclusive)
|
|
status = ocfs2_dquot_drop_slow(inode);
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type)
|
|
{
|
|
struct ocfs2_dquot *dquot =
|
|
kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS);
|
|
|
|
if (!dquot)
|
|
return NULL;
|
|
return &dquot->dq_dquot;
|
|
}
|
|
|
|
static void ocfs2_destroy_dquot(struct dquot *dquot)
|
|
{
|
|
kmem_cache_free(ocfs2_dquot_cachep, dquot);
|
|
}
|
|
|
|
struct dquot_operations ocfs2_quota_operations = {
|
|
.initialize = ocfs2_dquot_initialize,
|
|
.drop = ocfs2_dquot_drop,
|
|
.alloc_space = dquot_alloc_space,
|
|
.alloc_inode = dquot_alloc_inode,
|
|
.free_space = dquot_free_space,
|
|
.free_inode = dquot_free_inode,
|
|
.transfer = dquot_transfer,
|
|
.write_dquot = ocfs2_write_dquot,
|
|
.acquire_dquot = ocfs2_acquire_dquot,
|
|
.release_dquot = ocfs2_release_dquot,
|
|
.mark_dirty = ocfs2_mark_dquot_dirty,
|
|
.write_info = ocfs2_write_info,
|
|
.alloc_dquot = ocfs2_alloc_dquot,
|
|
.destroy_dquot = ocfs2_destroy_dquot,
|
|
};
|
|
|
|
int ocfs2_quota_setup(void)
|
|
{
|
|
ocfs2_quota_wq = create_workqueue("o2quot");
|
|
if (!ocfs2_quota_wq)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void ocfs2_quota_shutdown(void)
|
|
{
|
|
if (ocfs2_quota_wq) {
|
|
flush_workqueue(ocfs2_quota_wq);
|
|
destroy_workqueue(ocfs2_quota_wq);
|
|
ocfs2_quota_wq = NULL;
|
|
}
|
|
}
|