Release 4.11 fs/quota/quota_v2.c
/*
* vfsv0 quota IO operations on file
*/
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/dqblk_v2.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/quotaops.h>
#include <asm/byteorder.h>
#include "quota_tree.h"
#include "quotaio_v2.h"
MODULE_AUTHOR("Jan Kara");
MODULE_DESCRIPTION("Quota format v2 support");
MODULE_LICENSE("GPL");
#define __QUOTA_V2_PARANOIA
static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot);
static void v2r0_disk2memdqb(struct dquot *dquot, void *dp);
static int v2r0_is_id(void *dp, struct dquot *dquot);
static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot);
static void v2r1_disk2memdqb(struct dquot *dquot, void *dp);
static int v2r1_is_id(void *dp, struct dquot *dquot);
static const struct qtree_fmt_operations v2r0_qtree_ops = {
.mem2disk_dqblk = v2r0_mem2diskdqb,
.disk2mem_dqblk = v2r0_disk2memdqb,
.is_id = v2r0_is_id,
};
static const struct qtree_fmt_operations v2r1_qtree_ops = {
.mem2disk_dqblk = v2r1_mem2diskdqb,
.disk2mem_dqblk = v2r1_disk2memdqb,
.is_id = v2r1_is_id,
};
#define QUOTABLOCK_BITS 10
#define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS)
static inline qsize_t v2_stoqb(qsize_t space)
{
return (space + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
static inline qsize_t v2_qbtos(qsize_t blocks)
{
return blocks << QUOTABLOCK_BITS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static int v2_read_header(struct super_block *sb, int type,
struct v2_disk_dqheader *dqhead)
{
ssize_t size;
size = sb->s_op->quota_read(sb, type, (char *)dqhead,
sizeof(struct v2_disk_dqheader), 0);
if (size != sizeof(struct v2_disk_dqheader)) {
quota_error(sb, "Failed header read: expected=%zd got=%zd",
sizeof(struct v2_disk_dqheader), size);
return 0;
}
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 70 | 85.37% | 3 | 60.00% |
| Valdis Kletnieks | 8 | 9.76% | 1 | 20.00% |
| Jiaying Zhang | 4 | 4.88% | 1 | 20.00% |
| Total | 82 | 100.00% | 5 | 100.00% |
/* Check whether given file is really vfsv0 quotafile */
static int v2_check_quota_file(struct super_block *sb, int type)
{
struct v2_disk_dqheader dqhead;
static const uint quota_magics[] = V2_INITQMAGICS;
static const uint quota_versions[] = V2_INITQVERSIONS;
if (!v2_read_header(sb, type, &dqhead))
return 0;
if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type] ||
le32_to_cpu(dqhead.dqh_version) > quota_versions[type])
return 0;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 82 | 100.00% | 2 | 100.00% |
| Total | 82 | 100.00% | 2 | 100.00% |
/* Read information header from quota file */
static int v2_read_file_info(struct super_block *sb, int type)
{
struct v2_disk_dqinfo dinfo;
struct v2_disk_dqheader dqhead;
struct mem_dqinfo *info = sb_dqinfo(sb, type);
struct qtree_mem_dqinfo *qinfo;
ssize_t size;
unsigned int version;
if (!v2_read_header(sb, type, &dqhead))
return -1;
version = le32_to_cpu(dqhead.dqh_version);
if ((info->dqi_fmt_id == QFMT_VFS_V0 && version != 0) ||
(info->dqi_fmt_id == QFMT_VFS_V1 && version != 1))
return -1;
size = sb->s_op->quota_read(sb, type, (char *)&dinfo,
sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
if (size != sizeof(struct v2_disk_dqinfo)) {
quota_error(sb, "Can't read info structure");
return -1;
}
info->dqi_priv = kmalloc(sizeof(struct qtree_mem_dqinfo), GFP_NOFS);
if (!info->dqi_priv) {
printk(KERN_WARNING
"Not enough memory for quota information structure.\n");
return -ENOMEM;
}
qinfo = info->dqi_priv;
if (version == 0) {
/* limits are stored as unsigned 32-bit data */
info->dqi_max_spc_limit = 0xffffffffLL << QUOTABLOCK_BITS;
info->dqi_max_ino_limit = 0xffffffff;
} else {
/*
* Used space is stored as unsigned 64-bit value in bytes but
* quota core supports only signed 64-bit values so use that
* as a limit
*/
info->dqi_max_spc_limit = 0x7fffffffffffffffLL; /* 2^63-1 */
info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
}
info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
/* No flags currently supported */
info->dqi_flags = 0;
qinfo->dqi_sb = sb;
qinfo->dqi_type = type;
qinfo->dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
qinfo->dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
qinfo->dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
qinfo->dqi_blocksize_bits = V2_DQBLKSIZE_BITS;
qinfo->dqi_usable_bs = 1 << V2_DQBLKSIZE_BITS;
qinfo->dqi_qtree_depth = qtree_depth(qinfo);
if (version == 0) {
qinfo->dqi_entry_size = sizeof(struct v2r0_disk_dqblk);
qinfo->dqi_ops = &v2r0_qtree_ops;
} else {
qinfo->dqi_entry_size = sizeof(struct v2r1_disk_dqblk);
qinfo->dqi_ops = &v2r1_qtree_ops;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 364 | 96.30% | 9 | 75.00% |
| Andrew Perepechko | 10 | 2.65% | 1 | 8.33% |
| Jiaying Zhang | 3 | 0.79% | 1 | 8.33% |
| Davidlohr Bueso A | 1 | 0.26% | 1 | 8.33% |
| Total | 378 | 100.00% | 12 | 100.00% |
/* Write information header to quota file */
static int v2_write_file_info(struct super_block *sb, int type)
{
struct v2_disk_dqinfo dinfo;
struct mem_dqinfo *info = sb_dqinfo(sb, type);
struct qtree_mem_dqinfo *qinfo = info->dqi_priv;
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);
/* No flags currently supported */
dinfo.dqi_flags = cpu_to_le32(0);
spin_unlock(&dq_data_lock);
dinfo.dqi_blocks = cpu_to_le32(qinfo->dqi_blocks);
dinfo.dqi_free_blk = cpu_to_le32(qinfo->dqi_free_blk);
dinfo.dqi_free_entry = cpu_to_le32(qinfo->dqi_free_entry);
size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
if (size != sizeof(struct v2_disk_dqinfo)) {
quota_error(sb, "Can't write info structure");
return -1;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 165 | 91.67% | 5 | 71.43% |
| Andrew Morton | 12 | 6.67% | 1 | 14.29% |
| Jiaying Zhang | 3 | 1.67% | 1 | 14.29% |
| Total | 180 | 100.00% | 7 | 100.00% |
static void v2r0_disk2memdqb(struct dquot *dquot, void *dp)
{
struct v2r0_disk_dqblk *d = dp, empty;
struct mem_dqblk *m = &dquot->dq_dqb;
m->dqb_ihardlimit = le32_to_cpu(d->dqb_ihardlimit);
m->dqb_isoftlimit = le32_to_cpu(d->dqb_isoftlimit);
m->dqb_curinodes = le32_to_cpu(d->dqb_curinodes);
m->dqb_itime = le64_to_cpu(d->dqb_itime);
m->dqb_bhardlimit = v2_qbtos(le32_to_cpu(d->dqb_bhardlimit));
m->dqb_bsoftlimit = v2_qbtos(le32_to_cpu(d->dqb_bsoftlimit));
m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
m->dqb_btime = le64_to_cpu(d->dqb_btime);
/* We need to escape back all-zero structure */
memset(&empty, 0, sizeof(struct v2r0_disk_dqblk));
empty.dqb_itime = cpu_to_le64(1);
if (!memcmp(&empty, dp, sizeof(struct v2r0_disk_dqblk)))
m->dqb_itime = 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 175 | 100.00% | 4 | 100.00% |
| Total | 175 | 100.00% | 4 | 100.00% |
static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot)
{
struct v2r0_disk_dqblk *d = dp;
struct mem_dqblk *m = &dquot->dq_dqb;
struct qtree_mem_dqinfo *info =
sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
d->dqb_ihardlimit = cpu_to_le32(m->dqb_ihardlimit);
d->dqb_isoftlimit = cpu_to_le32(m->dqb_isoftlimit);
d->dqb_curinodes = cpu_to_le32(m->dqb_curinodes);
d->dqb_itime = cpu_to_le64(m->dqb_itime);
d->dqb_bhardlimit = cpu_to_le32(v2_stoqb(m->dqb_bhardlimit));
d->dqb_bsoftlimit = cpu_to_le32(v2_stoqb(m->dqb_bsoftlimit));
d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
d->dqb_btime = cpu_to_le64(m->dqb_btime);
d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id));
if (qtree_entry_unused(info, dp))
d->dqb_itime = cpu_to_le64(1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 172 | 95.03% | 6 | 85.71% |
| Eric W. Biedermann | 9 | 4.97% | 1 | 14.29% |
| Total | 181 | 100.00% | 7 | 100.00% |
static int v2r0_is_id(void *dp, struct dquot *dquot)
{
struct v2r0_disk_dqblk *d = dp;
struct qtree_mem_dqinfo *info =
sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
if (qtree_entry_unused(info, dp))
return 0;
return qid_eq(make_kqid(&init_user_ns, dquot->dq_id.type,
le32_to_cpu(d->dqb_id)),
dquot->dq_id);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 62 | 76.54% | 4 | 80.00% |
| Eric W. Biedermann | 19 | 23.46% | 1 | 20.00% |
| Total | 81 | 100.00% | 5 | 100.00% |
static void v2r1_disk2memdqb(struct dquot *dquot, void *dp)
{
struct v2r1_disk_dqblk *d = dp, empty;
struct mem_dqblk *m = &dquot->dq_dqb;
m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
m->dqb_itime = le64_to_cpu(d->dqb_itime);
m->dqb_bhardlimit = v2_qbtos(le64_to_cpu(d->dqb_bhardlimit));
m->dqb_bsoftlimit = v2_qbtos(le64_to_cpu(d->dqb_bsoftlimit));
m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
m->dqb_btime = le64_to_cpu(d->dqb_btime);
/* We need to escape back all-zero structure */
memset(&empty, 0, sizeof(struct v2r1_disk_dqblk));
empty.dqb_itime = cpu_to_le64(1);
if (!memcmp(&empty, dp, sizeof(struct v2r1_disk_dqblk)))
m->dqb_itime = 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 175 | 100.00% | 3 | 100.00% |
| Total | 175 | 100.00% | 3 | 100.00% |
static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot)
{
struct v2r1_disk_dqblk *d = dp;
struct mem_dqblk *m = &dquot->dq_dqb;
struct qtree_mem_dqinfo *info =
sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
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_itime = cpu_to_le64(m->dqb_itime);
d->dqb_bhardlimit = cpu_to_le64(v2_stoqb(m->dqb_bhardlimit));
d->dqb_bsoftlimit = cpu_to_le64(v2_stoqb(m->dqb_bsoftlimit));
d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
d->dqb_btime = cpu_to_le64(m->dqb_btime);
d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id));
if (qtree_entry_unused(info, dp))
d->dqb_itime = cpu_to_le64(1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 172 | 95.03% | 1 | 50.00% |
| Eric W. Biedermann | 9 | 4.97% | 1 | 50.00% |
| Total | 181 | 100.00% | 2 | 100.00% |
static int v2r1_is_id(void *dp, struct dquot *dquot)
{
struct v2r1_disk_dqblk *d = dp;
struct qtree_mem_dqinfo *info =
sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
if (qtree_entry_unused(info, dp))
return 0;
return qid_eq(make_kqid(&init_user_ns, dquot->dq_id.type,
le32_to_cpu(d->dqb_id)),
dquot->dq_id);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 62 | 76.54% | 1 | 50.00% |
| Eric W. Biedermann | 19 | 23.46% | 1 | 50.00% |
| Total | 81 | 100.00% | 2 | 100.00% |
static int v2_read_dquot(struct dquot *dquot)
{
return qtree_read_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv, dquot);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 29 | 90.62% | 4 | 80.00% |
| Eric W. Biedermann | 3 | 9.38% | 1 | 20.00% |
| Total | 32 | 100.00% | 5 | 100.00% |
static int v2_write_dquot(struct dquot *dquot)
{
return qtree_write_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv, dquot);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 29 | 90.62% | 4 | 80.00% |
| Eric W. Biedermann | 3 | 9.38% | 1 | 20.00% |
| Total | 32 | 100.00% | 5 | 100.00% |
static int v2_release_dquot(struct dquot *dquot)
{
return qtree_release_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv, dquot);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 24 | 75.00% | 3 | 60.00% |
| Andrew Morton | 5 | 15.62% | 1 | 20.00% |
| Eric W. Biedermann | 3 | 9.38% | 1 | 20.00% |
| Total | 32 | 100.00% | 5 | 100.00% |
static int v2_free_file_info(struct super_block *sb, int type)
{
kfree(sb_dqinfo(sb, type)->dqi_priv);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 29 | 100.00% | 1 | 100.00% |
| Total | 29 | 100.00% | 1 | 100.00% |
static int v2_get_next_id(struct super_block *sb, struct kqid *qid)
{
return qtree_get_next_id(sb_dqinfo(sb, qid->type)->dqi_priv, qid);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 33 | 100.00% | 1 | 100.00% |
| Total | 33 | 100.00% | 1 | 100.00% |
static const struct quota_format_ops v2_format_ops = {
.check_quota_file = v2_check_quota_file,
.read_file_info = v2_read_file_info,
.write_file_info = v2_write_file_info,
.free_file_info = v2_free_file_info,
.read_dqblk = v2_read_dquot,
.commit_dqblk = v2_write_dquot,
.release_dqblk = v2_release_dquot,
.get_next_id = v2_get_next_id,
};
static struct quota_format_type v2r0_quota_format = {
.qf_fmt_id = QFMT_VFS_V0,
.qf_ops = &v2_format_ops,
.qf_owner = THIS_MODULE
};
static struct quota_format_type v2r1_quota_format = {
.qf_fmt_id = QFMT_VFS_V1,
.qf_ops = &v2_format_ops,
.qf_owner = THIS_MODULE
};
static int __init init_v2_quota_format(void)
{
int ret;
ret = register_quota_format(&v2r0_quota_format);
if (ret)
return ret;
return register_quota_format(&v2r1_quota_format);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 34 | 100.00% | 2 | 100.00% |
| Total | 34 | 100.00% | 2 | 100.00% |
static void __exit exit_v2_quota_format(void)
{
unregister_quota_format(&v2r0_quota_format);
unregister_quota_format(&v2r1_quota_format);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 21 | 100.00% | 2 | 100.00% |
| Total | 21 | 100.00% | 2 | 100.00% |
module_init(init_v2_quota_format);
module_exit(exit_v2_quota_format);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 2004 | 93.43% | 14 | 58.33% |
| Eric W. Biedermann | 65 | 3.03% | 1 | 4.17% |
| Andrew Morton | 23 | 1.07% | 1 | 4.17% |
| Art Haas | 18 | 0.84% | 1 | 4.17% |
| Andrew Perepechko | 10 | 0.47% | 1 | 4.17% |
| Jiaying Zhang | 10 | 0.47% | 1 | 4.17% |
| Valdis Kletnieks | 8 | 0.37% | 1 | 4.17% |
| Arnaldo Carvalho de Melo | 3 | 0.14% | 1 | 4.17% |
| Julia Lawall | 2 | 0.09% | 1 | 4.17% |
| Alexey Dobriyan | 1 | 0.05% | 1 | 4.17% |
| Davidlohr Bueso A | 1 | 0.05% | 1 | 4.17% |
| Total | 2145 | 100.00% | 24 | 100.00% |
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