diff options
Diffstat (limited to 'fs/bcachefs/quota.c')
| -rw-r--r-- | fs/bcachefs/quota.c | 979 |
1 files changed, 979 insertions, 0 deletions
diff --git a/fs/bcachefs/quota.c b/fs/bcachefs/quota.c new file mode 100644 index 0000000000..a54647c36b --- /dev/null +++ b/fs/bcachefs/quota.c @@ -0,0 +1,979 @@ +// 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, + 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 bkey_invalid_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_str(out, "i_fieldmask"); + prt_tab(out); + prt_printf(out, "%x", i->i_fieldmask); + prt_newline(out); + + prt_str(out, "i_flags"); + prt_tab(out); + prt_printf(out, "%u", i->i_flags); + prt_newline(out); + + prt_str(out, "i_spc_timelimit"); + prt_tab(out); + prt_printf(out, "%u", i->i_spc_timelimit); + prt_newline(out); + + prt_str(out, "i_ino_timelimit"); + prt_tab(out); + prt_printf(out, "%u", i->i_ino_timelimit); + prt_newline(out); + + prt_str(out, "i_rt_spc_timelimit"); + prt_tab(out); + prt_printf(out, "%u", i->i_rt_spc_timelimit); + prt_newline(out); + + prt_str(out, "i_spc_warnlimit"); + prt_tab(out); + prt_printf(out, "%u", i->i_spc_warnlimit); + prt_newline(out); + + prt_str(out, "i_ino_warnlimit"); + prt_tab(out); + prt_printf(out, "%u", i->i_ino_warnlimit); + prt_newline(out); + + prt_str(out, "i_rt_spc_warnlimit"); + prt_tab(out); + prt_printf(out, "%u", i->i_rt_spc_warnlimit); + prt_newline(out); +} + +static void qc_dqblk_to_text(struct printbuf *out, struct qc_dqblk *q) +{ + printbuf_tabstops_reset(out); + printbuf_tabstop_push(out, 20); + + prt_str(out, "d_fieldmask"); + prt_tab(out); + prt_printf(out, "%x", q->d_fieldmask); + prt_newline(out); + + prt_str(out, "d_spc_hardlimit"); + prt_tab(out); + prt_printf(out, "%llu", q->d_spc_hardlimit); + prt_newline(out); + + prt_str(out, "d_spc_softlimit"); + prt_tab(out); + prt_printf(out, "%llu", q->d_spc_softlimit); + prt_newline(out); + + prt_str(out, "d_ino_hardlimit"); + prt_tab(out); + prt_printf(out, "%llu", q->d_ino_hardlimit); + prt_newline(out); + + prt_str(out, "d_ino_softlimit"); + prt_tab(out); + prt_printf(out, "%llu", q->d_ino_softlimit); + prt_newline(out); + + prt_str(out, "d_space"); + prt_tab(out); + prt_printf(out, "%llu", q->d_space); + prt_newline(out); + + prt_str(out, "d_ino_count"); + prt_tab(out); + prt_printf(out, "%llu", q->d_ino_count); + prt_newline(out); + + prt_str(out, "d_ino_timer"); + prt_tab(out); + prt_printf(out, "%llu", q->d_ino_timer); + prt_newline(out); + + prt_str(out, "d_spc_timer"); + prt_tab(out); + prt_printf(out, "%llu", q->d_spc_timer); + prt_newline(out); + + prt_str(out, "d_ino_warns"); + prt_tab(out); + prt_printf(out, "%i", q->d_ino_warns); + prt_newline(out); + + prt_str(out, "d_spc_warns"); + prt_tab(out); + prt_printf(out, "%i", q->d_spc_warns); + prt_newline(out); +} + +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; + int ret; + + ret = bch2_snapshot_tree_lookup(trans, + bch2_snapshot_tree(c, k.k->p.snapshot), &s_t); + bch2_fs_inconsistent_on(bch2_err_matches(ret, ENOENT), c, + "%s: snapshot tree %u not found", __func__, + snapshot_t(c, k.k->p.snapshot)->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) +{ + struct bch_sb_field_quota *sb_quota; + struct btree_trans *trans; + struct btree_iter iter; + struct bkey_s_c k; + int ret; + + mutex_lock(&c->sb_lock); + 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); + + trans = bch2_trans_get(c); + + ret = for_each_btree_key2(trans, iter, BTREE_ID_quotas, + POS_MIN, BTREE_ITER_PREFETCH, k, + __bch2_quota_set(c, k, NULL)) ?: + for_each_btree_key2(trans, iter, BTREE_ID_inodes, + POS_MIN, BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS, k, + bch2_fs_quota_read_inode(trans, &iter, k)); + + bch2_trans_put(trans); + + if (ret) + 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 */ |