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Message-ID: <CALYGNiN1bfStzKTNX+f6uUUNrhzE4qNFRgCWLF0rZxKXAtn9BQ@mail.gmail.com>
Date: Wed, 11 Mar 2015 10:40:08 +0300
From: Konstantin Khlebnikov <koct9i@...il.com>
To: Li Xi <pkuelelixi@...il.com>
Cc: linux-fsdevel <linux-fsdevel@...r.kernel.org>,
"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
Linux API <linux-api@...r.kernel.org>,
"Theodore Ts'o" <tytso@....edu>,
Andreas Dilger <adilger@...ger.ca>, Jan Kara <jack@...e.cz>,
Al Viro <viro@...iv.linux.org.uk>,
Christoph Hellwig <hch@...radead.org>,
Дмитрий Монахов
<dmonakhov@...nvz.org>
Subject: Re: [v9 3/5] ext4: adds project quota support
On Wed, Mar 11, 2015 at 6:03 AM, Li Xi <pkuelelixi@...il.com> wrote:
> This patch adds mount options for enabling/disabling project quota
> accounting and enforcement. A new specific inode is also used for
> project quota accounting.
>
> Signed-off-by: Li Xi <lixi@....com>
> Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org>
> Reviewed-by: Jan Kara <jack@...e.cz>
> ---
> fs/ext4/ext4.h | 8 +++-
> fs/ext4/super.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++-------
> 2 files changed, 93 insertions(+), 14 deletions(-)
>
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index 7acb2da..3443456 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -208,6 +208,7 @@ struct ext4_io_submit {
> #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */
> #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */
> #define EXT4_JOURNAL_INO 8 /* Journal inode */
> +#define EXT4_PRJ_QUOTA_INO 9 /* Project quota inode */
This special inode is reserved for: EXT2_EXCLUDE_INO 9 /* The
"exclude" inode, for snapshots */
I'm not sure if it's ok to use it for project quota.
>
> /* First non-reserved inode for old ext4 filesystems */
> #define EXT4_GOOD_OLD_FIRST_INO 11
> @@ -987,6 +988,7 @@ struct ext4_inode_info {
> #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */
> #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */
> #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */
> +#define EXT4_MOUNT_PRJQUOTA 0x2000000 /* Project quota support */
> #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */
> #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */
> #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */
> @@ -1169,7 +1171,8 @@ struct ext4_super_block {
> __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */
> __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */
> __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */
> - __le32 s_reserved[105]; /* Padding to the end of the block */
> + __le32 s_prj_quota_inum; /* inode for tracking project quota */
> + __le32 s_reserved[104]; /* Padding to the end of the block */
> __le32 s_checksum; /* crc32c(superblock) */
> };
>
> @@ -1184,7 +1187,7 @@ struct ext4_super_block {
> #define EXT4_MF_FS_ABORTED 0x0002 /* Fatal error detected */
>
> /* Number of quota types we support */
> -#define EXT4_MAXQUOTAS 2
> +#define EXT4_MAXQUOTAS 3
>
> /*
> * fourth extended-fs super-block data in memory
> @@ -1376,6 +1379,7 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
> ino == EXT4_BOOT_LOADER_INO ||
> ino == EXT4_JOURNAL_INO ||
> ino == EXT4_RESIZE_INO ||
> + ino == EXT4_PRJ_QUOTA_INO ||
> (ino >= EXT4_FIRST_INO(sb) &&
> ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
> }
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index 04c6cc3..e057daa 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -1036,8 +1036,8 @@ static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
> }
>
> #ifdef CONFIG_QUOTA
> -#define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group")
> -#define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
> +static char *quotatypes[] = INITQFNAMES;
> +#define QTYPE2NAME(t) (quotatypes[t])
>
> static int ext4_write_dquot(struct dquot *dquot);
> static int ext4_acquire_dquot(struct dquot *dquot);
> @@ -1135,7 +1135,8 @@ enum {
> Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit,
> Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
> Opt_data_err_abort, Opt_data_err_ignore,
> - Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
> + Opt_usrjquota, Opt_grpjquota, Opt_prjjquota,
> + Opt_offusrjquota, Opt_offgrpjquota, Opt_offprjjquota,
> Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,
> Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err,
> Opt_usrquota, Opt_grpquota, Opt_i_version,
> @@ -1190,6 +1191,8 @@ static const match_table_t tokens = {
> {Opt_usrjquota, "usrjquota=%s"},
> {Opt_offgrpjquota, "grpjquota="},
> {Opt_grpjquota, "grpjquota=%s"},
> + {Opt_prjjquota, "prjjquota"},
> + {Opt_offprjjquota, "offprjjquota"},
> {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
> {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
> {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
> @@ -1412,11 +1415,14 @@ static const struct mount_opts {
> {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA,
> MOPT_SET | MOPT_Q},
> {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA |
> - EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q},
> + EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA),
> + MOPT_CLEAR | MOPT_Q},
> {Opt_usrjquota, 0, MOPT_Q},
> {Opt_grpjquota, 0, MOPT_Q},
> + {Opt_prjjquota, 0, MOPT_Q},
> {Opt_offusrjquota, 0, MOPT_Q},
> {Opt_offgrpjquota, 0, MOPT_Q},
> + {Opt_offprjjquota, 0, MOPT_Q},
> {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT},
> {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT},
> {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT},
> @@ -1433,16 +1439,25 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
> kuid_t uid;
> kgid_t gid;
> int arg = 0;
> -
> #ifdef CONFIG_QUOTA
> + char *prj_qf_name = "aquota.project";
If you already have inode numer in super-block why do you need this name here?
Modern journalled quota is stored in special inodes and invisible from
user-space.
> + substring_t prj_qf_string = {
> + .from = prj_qf_name,
> + .to = &prj_qf_name[strlen(prj_qf_name)],
> + };
> +
> if (token == Opt_usrjquota)
> return set_qf_name(sb, USRQUOTA, &args[0]);
> else if (token == Opt_grpjquota)
> return set_qf_name(sb, GRPQUOTA, &args[0]);
> + else if (token == Opt_prjjquota)
> + return set_qf_name(sb, PRJQUOTA, &prj_qf_string);
> else if (token == Opt_offusrjquota)
> return clear_qf_name(sb, USRQUOTA);
> else if (token == Opt_offgrpjquota)
> return clear_qf_name(sb, GRPQUOTA);
> + else if (token == Opt_offprjjquota)
> + return clear_qf_name(sb, PRJQUOTA);
> #endif
> switch (token) {
> case Opt_noacl:
> @@ -1668,19 +1683,28 @@ static int parse_options(char *options, struct super_block *sb,
> }
> #ifdef CONFIG_QUOTA
> if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) &&
> - (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) {
> + (test_opt(sb, USRQUOTA) ||
> + test_opt(sb, GRPQUOTA) ||
> + test_opt(sb, PRJQUOTA))) {
> ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA "
> "feature is enabled");
> return 0;
> }
> - if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
> + if (sbi->s_qf_names[USRQUOTA] ||
> + sbi->s_qf_names[GRPQUOTA] ||
> + sbi->s_qf_names[PRJQUOTA]) {
> if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
> clear_opt(sb, USRQUOTA);
>
> if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA])
> clear_opt(sb, GRPQUOTA);
>
> - if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) {
> + if (test_opt(sb, PRJQUOTA) && sbi->s_qf_names[PRJQUOTA])
> + clear_opt(sb, PRJQUOTA);
> +
> + if (test_opt(sb, GRPQUOTA) ||
> + test_opt(sb, USRQUOTA) ||
> + test_opt(sb, PRJQUOTA)) {
> ext4_msg(sb, KERN_ERR, "old and new quota "
> "format mixing");
> return 0;
> @@ -1740,6 +1764,9 @@ static inline void ext4_show_quota_options(struct seq_file *seq,
>
> if (sbi->s_qf_names[GRPQUOTA])
> seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
> +
> + if (sbi->s_qf_names[PRJQUOTA])
> + seq_printf(seq, ",prjjquota=%s", sbi->s_qf_names[PRJQUOTA]);
> #endif
> }
>
> @@ -3944,7 +3971,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
> sb->s_qcop = &ext4_qctl_sysfile_operations;
> else
> sb->s_qcop = &ext4_qctl_operations;
> - sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
> + sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
> #endif
> memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid));
>
> @@ -5040,6 +5067,46 @@ restore_opts:
> return err;
> }
>
> +static int ext4_statfs_project(struct super_block *sb,
> + kprojid_t projid, struct kstatfs *buf)
> +{
> + struct kqid qid;
> + struct dquot *dquot;
> + u64 limit;
> + u64 curblock;
> +
> + qid = make_kqid_projid(projid);
> + dquot = dqget(sb, qid);
> + if (!dquot)
> + return -ESRCH;
> + spin_lock(&dq_data_lock);
> +
> + limit = dquot->dq_dqb.dqb_bsoftlimit ?
> + dquot->dq_dqb.dqb_bsoftlimit :
> + dquot->dq_dqb.dqb_bhardlimit;
> + if (limit && buf->f_blocks * buf->f_bsize > limit) {
> + curblock = dquot->dq_dqb.dqb_curspace / buf->f_bsize;
> + buf->f_blocks = limit / buf->f_bsize;
> + buf->f_bfree = buf->f_bavail =
> + (buf->f_blocks > curblock) ?
> + (buf->f_blocks - curblock) : 0;
> + }
> +
> + limit = dquot->dq_dqb.dqb_isoftlimit ?
> + dquot->dq_dqb.dqb_isoftlimit :
> + dquot->dq_dqb.dqb_ihardlimit;
> + if (limit && buf->f_files > limit) {
> + buf->f_files = limit;
> + buf->f_ffree =
> + (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
> + (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
> + }
> +
> + spin_unlock(&dq_data_lock);
> + dqput(dquot);
> + return 0;
> +}
> +
> static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
> {
> struct super_block *sb = dentry->d_sb;
> @@ -5048,6 +5115,7 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
> ext4_fsblk_t overhead = 0, resv_blocks;
> u64 fsid;
> s64 bfree;
> + struct inode *inode = dentry->d_inode;
> resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters));
>
> if (!test_opt(sb, MINIX_DF))
> @@ -5072,6 +5140,9 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
> buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
> buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
>
> + if (ext4_test_inode_flag(inode, EXT4_INODE_PROJINHERIT) &&
> + sb_has_quota_limits_enabled(sb, PRJQUOTA))
> + ext4_statfs_project(sb, EXT4_I(inode)->i_projid, buf);
> return 0;
> }
>
> @@ -5152,7 +5223,9 @@ static int ext4_mark_dquot_dirty(struct dquot *dquot)
>
> /* Are we journaling quotas? */
> if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) ||
> - sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
> + sbi->s_qf_names[USRQUOTA] ||
> + sbi->s_qf_names[GRPQUOTA] ||
> + sbi->s_qf_names[PRJQUOTA]) {
> dquot_mark_dquot_dirty(dquot);
> return ext4_write_dquot(dquot);
> } else {
> @@ -5236,7 +5309,8 @@ static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
> struct inode *qf_inode;
> unsigned long qf_inums[EXT4_MAXQUOTAS] = {
> le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),
> - le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum)
> + le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),
> + le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)
> };
>
> BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA));
> @@ -5264,7 +5338,8 @@ static int ext4_enable_quotas(struct super_block *sb)
> int type, err = 0;
> unsigned long qf_inums[EXT4_MAXQUOTAS] = {
> le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),
> - le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum)
> + le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),
> + le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)
> };
>
> sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
> --
> 1.7.1
>
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