linux/fs/bcachefs/quota.c

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// SPDX-License-Identifier: GPL-2.0
#include "bcachefs.h"
#include "btree_update.h"
#include "errcode.h"
#include "error.h"
#include "inode.h"
#include "quota.h"
#include "snapshot.h"
#include "super-io.h"
static const char * const bch2_quota_types[] = {
"user",
"group",
"project",
};
static const char * const bch2_quota_counters[] = {
"space",
"inodes",
};
static int bch2_sb_quota_validate(struct bch_sb *sb, struct bch_sb_field *f,
enum bch_validate_flags flags, struct printbuf *err)
{
struct bch_sb_field_quota *q = field_to_type(f, quota);
if (vstruct_bytes(&q->field) < sizeof(*q)) {
prt_printf(err, "wrong size (got %zu should be %zu)",
vstruct_bytes(&q->field), sizeof(*q));
return -BCH_ERR_invalid_sb_quota;
}
return 0;
}
static void bch2_sb_quota_to_text(struct printbuf *out, struct bch_sb *sb,
struct bch_sb_field *f)
{
struct bch_sb_field_quota *q = field_to_type(f, quota);
unsigned qtyp, counter;
for (qtyp = 0; qtyp < ARRAY_SIZE(q->q); qtyp++) {
prt_printf(out, "%s: flags %llx",
bch2_quota_types[qtyp],
le64_to_cpu(q->q[qtyp].flags));
for (counter = 0; counter < Q_COUNTERS; counter++)
prt_printf(out, " %s timelimit %u warnlimit %u",
bch2_quota_counters[counter],
le32_to_cpu(q->q[qtyp].c[counter].timelimit),
le32_to_cpu(q->q[qtyp].c[counter].warnlimit));
prt_newline(out);
}
}
const struct bch_sb_field_ops bch_sb_field_ops_quota = {
.validate = bch2_sb_quota_validate,
.to_text = bch2_sb_quota_to_text,
};
int bch2_quota_invalid(struct bch_fs *c, struct bkey_s_c k,
enum bch_validate_flags flags, struct printbuf *err)
{
int ret = 0;
bkey_fsck_err_on(k.k->p.inode >= QTYP_NR, c, err,
quota_type_invalid,
"invalid quota type (%llu >= %u)",
k.k->p.inode, QTYP_NR);
fsck_err:
return ret;
}
void bch2_quota_to_text(struct printbuf *out, struct bch_fs *c,
struct bkey_s_c k)
{
struct bkey_s_c_quota dq = bkey_s_c_to_quota(k);
unsigned i;
for (i = 0; i < Q_COUNTERS; i++)
prt_printf(out, "%s hardlimit %llu softlimit %llu",
bch2_quota_counters[i],
le64_to_cpu(dq.v->c[i].hardlimit),
le64_to_cpu(dq.v->c[i].softlimit));
}
#ifdef CONFIG_BCACHEFS_QUOTA
#include <linux/cred.h>
#include <linux/fs.h>
#include <linux/quota.h>
static void qc_info_to_text(struct printbuf *out, struct qc_info *i)
{
printbuf_tabstops_reset(out);
printbuf_tabstop_push(out, 20);
prt_printf(out, "i_fieldmask\t%x\n", i->i_fieldmask);
prt_printf(out, "i_flags\t%u\n", i->i_flags);
prt_printf(out, "i_spc_timelimit\t%u\n", i->i_spc_timelimit);
prt_printf(out, "i_ino_timelimit\t%u\n", i->i_ino_timelimit);
prt_printf(out, "i_rt_spc_timelimit\t%u\n", i->i_rt_spc_timelimit);
prt_printf(out, "i_spc_warnlimit\t%u\n", i->i_spc_warnlimit);
prt_printf(out, "i_ino_warnlimit\t%u\n", i->i_ino_warnlimit);
prt_printf(out, "i_rt_spc_warnlimit\t%u\n", i->i_rt_spc_warnlimit);
}
static void qc_dqblk_to_text(struct printbuf *out, struct qc_dqblk *q)
{
printbuf_tabstops_reset(out);
printbuf_tabstop_push(out, 20);
prt_printf(out, "d_fieldmask\t%x\n", q->d_fieldmask);
prt_printf(out, "d_spc_hardlimit\t%llu\n", q->d_spc_hardlimit);
prt_printf(out, "d_spc_softlimit\t%llu\n", q->d_spc_softlimit);
prt_printf(out, "d_ino_hardlimit\%llu\n", q->d_ino_hardlimit);
prt_printf(out, "d_ino_softlimit\t%llu\n", q->d_ino_softlimit);
prt_printf(out, "d_space\t%llu\n", q->d_space);
prt_printf(out, "d_ino_count\t%llu\n", q->d_ino_count);
prt_printf(out, "d_ino_timer\t%llu\n", q->d_ino_timer);
prt_printf(out, "d_spc_timer\t%llu\n", q->d_spc_timer);
prt_printf(out, "d_ino_warns\t%i\n", q->d_ino_warns);
prt_printf(out, "d_spc_warns\t%i\n", q->d_spc_warns);
}
static inline unsigned __next_qtype(unsigned i, unsigned qtypes)
{
qtypes >>= i;
return qtypes ? i + __ffs(qtypes) : QTYP_NR;
}
#define for_each_set_qtype(_c, _i, _q, _qtypes) \
for (_i = 0; \
(_i = __next_qtype(_i, _qtypes), \
_q = &(_c)->quotas[_i], \
_i < QTYP_NR); \
_i++)
static bool ignore_hardlimit(struct bch_memquota_type *q)
{
if (capable(CAP_SYS_RESOURCE))
return true;
#if 0
struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
return capable(CAP_SYS_RESOURCE) &&
(info->dqi_format->qf_fmt_id != QFMT_VFS_OLD ||
!(info->dqi_flags & DQF_ROOT_SQUASH));
#endif
return false;
}
enum quota_msg {
SOFTWARN, /* Softlimit reached */
SOFTLONGWARN, /* Grace time expired */
HARDWARN, /* Hardlimit reached */
HARDBELOW, /* Usage got below inode hardlimit */
SOFTBELOW, /* Usage got below inode softlimit */
};
static int quota_nl[][Q_COUNTERS] = {
[HARDWARN][Q_SPC] = QUOTA_NL_BHARDWARN,
[SOFTLONGWARN][Q_SPC] = QUOTA_NL_BSOFTLONGWARN,
[SOFTWARN][Q_SPC] = QUOTA_NL_BSOFTWARN,
[HARDBELOW][Q_SPC] = QUOTA_NL_BHARDBELOW,
[SOFTBELOW][Q_SPC] = QUOTA_NL_BSOFTBELOW,
[HARDWARN][Q_INO] = QUOTA_NL_IHARDWARN,
[SOFTLONGWARN][Q_INO] = QUOTA_NL_ISOFTLONGWARN,
[SOFTWARN][Q_INO] = QUOTA_NL_ISOFTWARN,
[HARDBELOW][Q_INO] = QUOTA_NL_IHARDBELOW,
[SOFTBELOW][Q_INO] = QUOTA_NL_ISOFTBELOW,
};
struct quota_msgs {
u8 nr;
struct {
u8 qtype;
u8 msg;
} m[QTYP_NR * Q_COUNTERS];
};
static void prepare_msg(unsigned qtype,
enum quota_counters counter,
struct quota_msgs *msgs,
enum quota_msg msg_type)
{
BUG_ON(msgs->nr >= ARRAY_SIZE(msgs->m));
msgs->m[msgs->nr].qtype = qtype;
msgs->m[msgs->nr].msg = quota_nl[msg_type][counter];
msgs->nr++;
}
static void prepare_warning(struct memquota_counter *qc,
unsigned qtype,
enum quota_counters counter,
struct quota_msgs *msgs,
enum quota_msg msg_type)
{
if (qc->warning_issued & (1 << msg_type))
return;
prepare_msg(qtype, counter, msgs, msg_type);
}
static void flush_warnings(struct bch_qid qid,
struct super_block *sb,
struct quota_msgs *msgs)
{
unsigned i;
for (i = 0; i < msgs->nr; i++)
quota_send_warning(make_kqid(&init_user_ns, msgs->m[i].qtype, qid.q[i]),
sb->s_dev, msgs->m[i].msg);
}
static int bch2_quota_check_limit(struct bch_fs *c,
unsigned qtype,
struct bch_memquota *mq,
struct quota_msgs *msgs,
enum quota_counters counter,
s64 v,
enum quota_acct_mode mode)
{
struct bch_memquota_type *q = &c->quotas[qtype];
struct memquota_counter *qc = &mq->c[counter];
u64 n = qc->v + v;
BUG_ON((s64) n < 0);
if (mode == KEY_TYPE_QUOTA_NOCHECK)
return 0;
if (v <= 0) {
if (n < qc->hardlimit &&
(qc->warning_issued & (1 << HARDWARN))) {
qc->warning_issued &= ~(1 << HARDWARN);
prepare_msg(qtype, counter, msgs, HARDBELOW);
}
if (n < qc->softlimit &&
(qc->warning_issued & (1 << SOFTWARN))) {
qc->warning_issued &= ~(1 << SOFTWARN);
prepare_msg(qtype, counter, msgs, SOFTBELOW);
}
qc->warning_issued = 0;
return 0;
}
if (qc->hardlimit &&
qc->hardlimit < n &&
!ignore_hardlimit(q)) {
prepare_warning(qc, qtype, counter, msgs, HARDWARN);
return -EDQUOT;
}
if (qc->softlimit &&
qc->softlimit < n) {
if (qc->timer == 0) {
qc->timer = ktime_get_real_seconds() + q->limits[counter].timelimit;
prepare_warning(qc, qtype, counter, msgs, SOFTWARN);
} else if (ktime_get_real_seconds() >= qc->timer &&
!ignore_hardlimit(q)) {
prepare_warning(qc, qtype, counter, msgs, SOFTLONGWARN);
return -EDQUOT;
}
}
return 0;
}
int bch2_quota_acct(struct bch_fs *c, struct bch_qid qid,
enum quota_counters counter, s64 v,
enum quota_acct_mode mode)
{
unsigned qtypes = enabled_qtypes(c);
struct bch_memquota_type *q;
struct bch_memquota *mq[QTYP_NR];
struct quota_msgs msgs;
unsigned i;
int ret = 0;
memset(&msgs, 0, sizeof(msgs));
for_each_set_qtype(c, i, q, qtypes) {
mq[i] = genradix_ptr_alloc(&q->table, qid.q[i], GFP_KERNEL);
if (!mq[i])
return -ENOMEM;
}
for_each_set_qtype(c, i, q, qtypes)
mutex_lock_nested(&q->lock, i);
for_each_set_qtype(c, i, q, qtypes) {
ret = bch2_quota_check_limit(c, i, mq[i], &msgs, counter, v, mode);
if (ret)
goto err;
}
for_each_set_qtype(c, i, q, qtypes)
mq[i]->c[counter].v += v;
err:
for_each_set_qtype(c, i, q, qtypes)
mutex_unlock(&q->lock);
flush_warnings(qid, c->vfs_sb, &msgs);
return ret;
}
static void __bch2_quota_transfer(struct bch_memquota *src_q,
struct bch_memquota *dst_q,
enum quota_counters counter, s64 v)
{
BUG_ON(v > src_q->c[counter].v);
BUG_ON(v + dst_q->c[counter].v < v);
src_q->c[counter].v -= v;
dst_q->c[counter].v += v;
}
int bch2_quota_transfer(struct bch_fs *c, unsigned qtypes,
struct bch_qid dst,
struct bch_qid src, u64 space,
enum quota_acct_mode mode)
{
struct bch_memquota_type *q;
struct bch_memquota *src_q[3], *dst_q[3];
struct quota_msgs msgs;
unsigned i;
int ret = 0;
qtypes &= enabled_qtypes(c);
memset(&msgs, 0, sizeof(msgs));
for_each_set_qtype(c, i, q, qtypes) {
src_q[i] = genradix_ptr_alloc(&q->table, src.q[i], GFP_KERNEL);
dst_q[i] = genradix_ptr_alloc(&q->table, dst.q[i], GFP_KERNEL);
if (!src_q[i] || !dst_q[i])
return -ENOMEM;
}
for_each_set_qtype(c, i, q, qtypes)
mutex_lock_nested(&q->lock, i);
for_each_set_qtype(c, i, q, qtypes) {
ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_SPC,
dst_q[i]->c[Q_SPC].v + space,
mode);
if (ret)
goto err;
ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_INO,
dst_q[i]->c[Q_INO].v + 1,
mode);
if (ret)
goto err;
}
for_each_set_qtype(c, i, q, qtypes) {
__bch2_quota_transfer(src_q[i], dst_q[i], Q_SPC, space);
__bch2_quota_transfer(src_q[i], dst_q[i], Q_INO, 1);
}
err:
for_each_set_qtype(c, i, q, qtypes)
mutex_unlock(&q->lock);
flush_warnings(dst, c->vfs_sb, &msgs);
return ret;
}
static int __bch2_quota_set(struct bch_fs *c, struct bkey_s_c k,
struct qc_dqblk *qdq)
{
struct bkey_s_c_quota dq;
struct bch_memquota_type *q;
struct bch_memquota *mq;
unsigned i;
BUG_ON(k.k->p.inode >= QTYP_NR);
if (!((1U << k.k->p.inode) & enabled_qtypes(c)))
return 0;
switch (k.k->type) {
case KEY_TYPE_quota:
dq = bkey_s_c_to_quota(k);
q = &c->quotas[k.k->p.inode];
mutex_lock(&q->lock);
mq = genradix_ptr_alloc(&q->table, k.k->p.offset, GFP_KERNEL);
if (!mq) {
mutex_unlock(&q->lock);
return -ENOMEM;
}
for (i = 0; i < Q_COUNTERS; i++) {
mq->c[i].hardlimit = le64_to_cpu(dq.v->c[i].hardlimit);
mq->c[i].softlimit = le64_to_cpu(dq.v->c[i].softlimit);
}
if (qdq && qdq->d_fieldmask & QC_SPC_TIMER)
mq->c[Q_SPC].timer = qdq->d_spc_timer;
if (qdq && qdq->d_fieldmask & QC_SPC_WARNS)
mq->c[Q_SPC].warns = qdq->d_spc_warns;
if (qdq && qdq->d_fieldmask & QC_INO_TIMER)
mq->c[Q_INO].timer = qdq->d_ino_timer;
if (qdq && qdq->d_fieldmask & QC_INO_WARNS)
mq->c[Q_INO].warns = qdq->d_ino_warns;
mutex_unlock(&q->lock);
}
return 0;
}
void bch2_fs_quota_exit(struct bch_fs *c)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
genradix_free(&c->quotas[i].table);
}
void bch2_fs_quota_init(struct bch_fs *c)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
mutex_init(&c->quotas[i].lock);
}
static struct bch_sb_field_quota *bch2_sb_get_or_create_quota(struct bch_sb_handle *sb)
{
struct bch_sb_field_quota *sb_quota = bch2_sb_field_get(sb->sb, quota);
if (sb_quota)
return sb_quota;
sb_quota = bch2_sb_field_resize(sb, quota, sizeof(*sb_quota) / sizeof(u64));
if (sb_quota) {
unsigned qtype, qc;
for (qtype = 0; qtype < QTYP_NR; qtype++)
for (qc = 0; qc < Q_COUNTERS; qc++)
sb_quota->q[qtype].c[qc].timelimit =
cpu_to_le32(7 * 24 * 60 * 60);
}
return sb_quota;
}
static void bch2_sb_quota_read(struct bch_fs *c)
{
struct bch_sb_field_quota *sb_quota;
unsigned i, j;
sb_quota = bch2_sb_field_get(c->disk_sb.sb, quota);
if (!sb_quota)
return;
for (i = 0; i < QTYP_NR; i++) {
struct bch_memquota_type *q = &c->quotas[i];
for (j = 0; j < Q_COUNTERS; j++) {
q->limits[j].timelimit =
le32_to_cpu(sb_quota->q[i].c[j].timelimit);
q->limits[j].warnlimit =
le32_to_cpu(sb_quota->q[i].c[j].warnlimit);
}
}
}
static int bch2_fs_quota_read_inode(struct btree_trans *trans,
struct btree_iter *iter,
struct bkey_s_c k)
{
struct bch_fs *c = trans->c;
struct bch_inode_unpacked u;
struct bch_snapshot_tree s_t;
u32 tree = bch2_snapshot_tree(c, k.k->p.snapshot);
int ret = bch2_snapshot_tree_lookup(trans, tree, &s_t);
bch2_fs_inconsistent_on(bch2_err_matches(ret, ENOENT), c,
"%s: snapshot tree %u not found", __func__, tree);
if (ret)
return ret;
if (!s_t.master_subvol)
goto advance;
ret = bch2_inode_find_by_inum_nowarn_trans(trans,
(subvol_inum) {
le32_to_cpu(s_t.master_subvol),
k.k->p.offset,
}, &u);
/*
* Inode might be deleted in this snapshot - the easiest way to handle
* that is to just skip it here:
*/
if (bch2_err_matches(ret, ENOENT))
goto advance;
if (ret)
return ret;
bch2_quota_acct(c, bch_qid(&u), Q_SPC, u.bi_sectors,
KEY_TYPE_QUOTA_NOCHECK);
bch2_quota_acct(c, bch_qid(&u), Q_INO, 1,
KEY_TYPE_QUOTA_NOCHECK);
advance:
bch2_btree_iter_set_pos(iter, bpos_nosnap_successor(iter->pos));
return 0;
}
int bch2_fs_quota_read(struct bch_fs *c)
{
mutex_lock(&c->sb_lock);
struct bch_sb_field_quota *sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
if (!sb_quota) {
mutex_unlock(&c->sb_lock);
return -BCH_ERR_ENOSPC_sb_quota;
}
bch2_sb_quota_read(c);
mutex_unlock(&c->sb_lock);
int ret = bch2_trans_run(c,
for_each_btree_key(trans, iter, BTREE_ID_quotas, POS_MIN,
BTREE_ITER_prefetch, k,
__bch2_quota_set(c, k, NULL)) ?:
for_each_btree_key(trans, iter, BTREE_ID_inodes, POS_MIN,
BTREE_ITER_prefetch|BTREE_ITER_all_snapshots, k,
bch2_fs_quota_read_inode(trans, &iter, k)));
bch_err_fn(c, ret);
return ret;
}
/* Enable/disable/delete quotas for an entire filesystem: */
static int bch2_quota_enable(struct super_block *sb, unsigned uflags)
{
struct bch_fs *c = sb->s_fs_info;
struct bch_sb_field_quota *sb_quota;
int ret = 0;
if (sb->s_flags & SB_RDONLY)
return -EROFS;
/* Accounting must be enabled at mount time: */
if (uflags & (FS_QUOTA_UDQ_ACCT|FS_QUOTA_GDQ_ACCT|FS_QUOTA_PDQ_ACCT))
return -EINVAL;
/* Can't enable enforcement without accounting: */
if ((uflags & FS_QUOTA_UDQ_ENFD) && !c->opts.usrquota)
return -EINVAL;
if ((uflags & FS_QUOTA_GDQ_ENFD) && !c->opts.grpquota)
return -EINVAL;
if (uflags & FS_QUOTA_PDQ_ENFD && !c->opts.prjquota)
return -EINVAL;
mutex_lock(&c->sb_lock);
sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
if (!sb_quota) {
ret = -BCH_ERR_ENOSPC_sb_quota;
goto unlock;
}
if (uflags & FS_QUOTA_UDQ_ENFD)
SET_BCH_SB_USRQUOTA(c->disk_sb.sb, true);
if (uflags & FS_QUOTA_GDQ_ENFD)
SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, true);
if (uflags & FS_QUOTA_PDQ_ENFD)
SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, true);
bch2_write_super(c);
unlock:
mutex_unlock(&c->sb_lock);
return bch2_err_class(ret);
}
static int bch2_quota_disable(struct super_block *sb, unsigned uflags)
{
struct bch_fs *c = sb->s_fs_info;
if (sb->s_flags & SB_RDONLY)
return -EROFS;
mutex_lock(&c->sb_lock);
if (uflags & FS_QUOTA_UDQ_ENFD)
SET_BCH_SB_USRQUOTA(c->disk_sb.sb, false);
if (uflags & FS_QUOTA_GDQ_ENFD)
SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, false);
if (uflags & FS_QUOTA_PDQ_ENFD)
SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, false);
bch2_write_super(c);
mutex_unlock(&c->sb_lock);
return 0;
}
static int bch2_quota_remove(struct super_block *sb, unsigned uflags)
{
struct bch_fs *c = sb->s_fs_info;
int ret;
if (sb->s_flags & SB_RDONLY)
return -EROFS;
if (uflags & FS_USER_QUOTA) {
if (c->opts.usrquota)
return -EINVAL;
ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
POS(QTYP_USR, 0),
POS(QTYP_USR, U64_MAX),
0, NULL);
if (ret)
return ret;
}
if (uflags & FS_GROUP_QUOTA) {
if (c->opts.grpquota)
return -EINVAL;
ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
POS(QTYP_GRP, 0),
POS(QTYP_GRP, U64_MAX),
0, NULL);
if (ret)
return ret;
}
if (uflags & FS_PROJ_QUOTA) {
if (c->opts.prjquota)
return -EINVAL;
ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
POS(QTYP_PRJ, 0),
POS(QTYP_PRJ, U64_MAX),
0, NULL);
if (ret)
return ret;
}
return 0;
}
/*
* Return quota status information, such as enforcements, quota file inode
* numbers etc.
*/
static int bch2_quota_get_state(struct super_block *sb, struct qc_state *state)
{
struct bch_fs *c = sb->s_fs_info;
unsigned qtypes = enabled_qtypes(c);
unsigned i;
memset(state, 0, sizeof(*state));
for (i = 0; i < QTYP_NR; i++) {
state->s_state[i].flags |= QCI_SYSFILE;
if (!(qtypes & (1 << i)))
continue;
state->s_state[i].flags |= QCI_ACCT_ENABLED;
state->s_state[i].spc_timelimit = c->quotas[i].limits[Q_SPC].timelimit;
state->s_state[i].spc_warnlimit = c->quotas[i].limits[Q_SPC].warnlimit;
state->s_state[i].ino_timelimit = c->quotas[i].limits[Q_INO].timelimit;
state->s_state[i].ino_warnlimit = c->quotas[i].limits[Q_INO].warnlimit;
}
return 0;
}
/*
* Adjust quota timers & warnings
*/
static int bch2_quota_set_info(struct super_block *sb, int type,
struct qc_info *info)
{
struct bch_fs *c = sb->s_fs_info;
struct bch_sb_field_quota *sb_quota;
int ret = 0;
if (0) {
struct printbuf buf = PRINTBUF;
qc_info_to_text(&buf, info);
pr_info("setting:\n%s", buf.buf);
printbuf_exit(&buf);
}
if (sb->s_flags & SB_RDONLY)
return -EROFS;
if (type >= QTYP_NR)
return -EINVAL;
if (!((1 << type) & enabled_qtypes(c)))
return -ESRCH;
if (info->i_fieldmask &
~(QC_SPC_TIMER|QC_INO_TIMER|QC_SPC_WARNS|QC_INO_WARNS))
return -EINVAL;
mutex_lock(&c->sb_lock);
sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
if (!sb_quota) {
ret = -BCH_ERR_ENOSPC_sb_quota;
goto unlock;
}
if (info->i_fieldmask & QC_SPC_TIMER)
sb_quota->q[type].c[Q_SPC].timelimit =
cpu_to_le32(info->i_spc_timelimit);
if (info->i_fieldmask & QC_SPC_WARNS)
sb_quota->q[type].c[Q_SPC].warnlimit =
cpu_to_le32(info->i_spc_warnlimit);
if (info->i_fieldmask & QC_INO_TIMER)
sb_quota->q[type].c[Q_INO].timelimit =
cpu_to_le32(info->i_ino_timelimit);
if (info->i_fieldmask & QC_INO_WARNS)
sb_quota->q[type].c[Q_INO].warnlimit =
cpu_to_le32(info->i_ino_warnlimit);
bch2_sb_quota_read(c);
bch2_write_super(c);
unlock:
mutex_unlock(&c->sb_lock);
return bch2_err_class(ret);
}
/* Get/set individual quotas: */
static void __bch2_quota_get(struct qc_dqblk *dst, struct bch_memquota *src)
{
dst->d_space = src->c[Q_SPC].v << 9;
dst->d_spc_hardlimit = src->c[Q_SPC].hardlimit << 9;
dst->d_spc_softlimit = src->c[Q_SPC].softlimit << 9;
dst->d_spc_timer = src->c[Q_SPC].timer;
dst->d_spc_warns = src->c[Q_SPC].warns;
dst->d_ino_count = src->c[Q_INO].v;
dst->d_ino_hardlimit = src->c[Q_INO].hardlimit;
dst->d_ino_softlimit = src->c[Q_INO].softlimit;
dst->d_ino_timer = src->c[Q_INO].timer;
dst->d_ino_warns = src->c[Q_INO].warns;
}
static int bch2_get_quota(struct super_block *sb, struct kqid kqid,
struct qc_dqblk *qdq)
{
struct bch_fs *c = sb->s_fs_info;
struct bch_memquota_type *q = &c->quotas[kqid.type];
qid_t qid = from_kqid(&init_user_ns, kqid);
struct bch_memquota *mq;
memset(qdq, 0, sizeof(*qdq));
mutex_lock(&q->lock);
mq = genradix_ptr(&q->table, qid);
if (mq)
__bch2_quota_get(qdq, mq);
mutex_unlock(&q->lock);
return 0;
}
static int bch2_get_next_quota(struct super_block *sb, struct kqid *kqid,
struct qc_dqblk *qdq)
{
struct bch_fs *c = sb->s_fs_info;
struct bch_memquota_type *q = &c->quotas[kqid->type];
qid_t qid = from_kqid(&init_user_ns, *kqid);
struct genradix_iter iter;
struct bch_memquota *mq;
int ret = 0;
mutex_lock(&q->lock);
genradix_for_each_from(&q->table, iter, mq, qid)
if (memcmp(mq, page_address(ZERO_PAGE(0)), sizeof(*mq))) {
__bch2_quota_get(qdq, mq);
*kqid = make_kqid(current_user_ns(), kqid->type, iter.pos);
goto found;
}
ret = -ENOENT;
found:
mutex_unlock(&q->lock);
return bch2_err_class(ret);
}
static int bch2_set_quota_trans(struct btree_trans *trans,
struct bkey_i_quota *new_quota,
struct qc_dqblk *qdq)
{
struct btree_iter iter;
struct bkey_s_c k;
int ret;
k = bch2_bkey_get_iter(trans, &iter, BTREE_ID_quotas, new_quota->k.p,
BTREE_ITER_slots|BTREE_ITER_intent);
ret = bkey_err(k);
if (unlikely(ret))
return ret;
if (k.k->type == KEY_TYPE_quota)
new_quota->v = *bkey_s_c_to_quota(k).v;
if (qdq->d_fieldmask & QC_SPC_SOFT)
new_quota->v.c[Q_SPC].softlimit = cpu_to_le64(qdq->d_spc_softlimit >> 9);
if (qdq->d_fieldmask & QC_SPC_HARD)
new_quota->v.c[Q_SPC].hardlimit = cpu_to_le64(qdq->d_spc_hardlimit >> 9);
if (qdq->d_fieldmask & QC_INO_SOFT)
new_quota->v.c[Q_INO].softlimit = cpu_to_le64(qdq->d_ino_softlimit);
if (qdq->d_fieldmask & QC_INO_HARD)
new_quota->v.c[Q_INO].hardlimit = cpu_to_le64(qdq->d_ino_hardlimit);
ret = bch2_trans_update(trans, &iter, &new_quota->k_i, 0);
bch2_trans_iter_exit(trans, &iter);
return ret;
}
static int bch2_set_quota(struct super_block *sb, struct kqid qid,
struct qc_dqblk *qdq)
{
struct bch_fs *c = sb->s_fs_info;
struct bkey_i_quota new_quota;
int ret;
if (0) {
struct printbuf buf = PRINTBUF;
qc_dqblk_to_text(&buf, qdq);
pr_info("setting:\n%s", buf.buf);
printbuf_exit(&buf);
}
if (sb->s_flags & SB_RDONLY)
return -EROFS;
bkey_quota_init(&new_quota.k_i);
new_quota.k.p = POS(qid.type, from_kqid(&init_user_ns, qid));
ret = bch2_trans_do(c, NULL, NULL, 0,
bch2_set_quota_trans(trans, &new_quota, qdq)) ?:
__bch2_quota_set(c, bkey_i_to_s_c(&new_quota.k_i), qdq);
return bch2_err_class(ret);
}
const struct quotactl_ops bch2_quotactl_operations = {
.quota_enable = bch2_quota_enable,
.quota_disable = bch2_quota_disable,
.rm_xquota = bch2_quota_remove,
.get_state = bch2_quota_get_state,
.set_info = bch2_quota_set_info,
.get_dqblk = bch2_get_quota,
.get_nextdqblk = bch2_get_next_quota,
.set_dqblk = bch2_set_quota,
};
#endif /* CONFIG_BCACHEFS_QUOTA */