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Date: Wed, 10 Sep 2014 22:02:32 +0200
From: Jan Kara <jack@...e.cz>
To: Li Xi <pkuelelixi@...il.com>
Cc: "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
Ext4 Developers List <linux-ext4@...r.kernel.org>,
Theodore Ts'o <tytso@....edu>,
Andreas Dilger <adilger@...ger.ca>,
"viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
"hch@...radead.org" <hch@...radead.org>, Jan Kara <jack@...e.cz>,
Dmitry Monakhov <dmonakhov@...nvz.org>
Subject: Re: [PATCH v3 3/4] quota: add project quota support
On Wed 10-09-14 11:54:31, Li Xi wrote:
> Adds project quota support for ext4
>
> 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 <at> ddn.com>
> Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org>
> ---
> Index: linux.git/fs/ext4/ext4.h
> ===================================================================
> --- linux.git.orig/fs/ext4/ext4.h
> +++ linux.git/fs/ext4/ext4.h
> @@ -217,6 +217,7 @@ 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 */
>
> /* First non-reserved inode for old ext4 filesystems */
> #define EXT4_GOOD_OLD_FIRST_INO 11
> @@ -993,6 +994,7 @@ 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 0x4000000 /* Project quota support */
Why didn't you take the first available 0x2000000?
> #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 */
> @@ -1168,7 +1170,8 @@ struct ext4_super_block {
> __le32 s_grp_quota_inum; /* inode for tracking group quota */
> __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */
> __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */
> - __le32 s_reserved[106]; /* Padding to the end of the block */
> + __le32 s_prj_quota_inum; /* inode for tracking project quota */
> + __le32 s_reserved[105]; /* Padding to the end of the block */
> __le32 s_checksum; /* crc32c(superblock) */
> };
>
> @@ -1372,6 +1375,7 @@ static inline int ext4_valid_inum(struct
> 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));
> }
> Index: linux.git/fs/ext4/super.c
> ===================================================================
> --- linux.git.orig/fs/ext4/super.c
> +++ linux.git/fs/ext4/super.c
> @@ -1048,8 +1048,8 @@ static int bdev_try_to_free_page(struct
> }
>
> #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);
> @@ -1162,10 +1162,11 @@ 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,
> + Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version,
> Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit,
> Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity,
> Opt_inode_readahead_blks, Opt_journal_ioprio,
> @@ -1216,6 +1217,8 @@ static const match_table_t tokens = {
> {Opt_usrjquota, "usrjquota=%s"},
> {Opt_offgrpjquota, "grpjquota="},
> {Opt_grpjquota, "grpjquota=%s"},
> + {Opt_offprjjquota, "prjjquota="},
> + {Opt_prjjquota, "prjjquota=%s"},
> {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
> {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
> {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
> @@ -1223,6 +1226,7 @@ static const match_table_t tokens = {
> {Opt_noquota, "noquota"},
> {Opt_quota, "quota"},
> {Opt_usrquota, "usrquota"},
> + {Opt_prjquota, "prjquota"},
> {Opt_barrier, "barrier=%u"},
> {Opt_barrier, "barrier"},
> {Opt_nobarrier, "nobarrier"},
> @@ -1435,6 +1439,12 @@ static const struct mount_opts {
> MOPT_SET | MOPT_Q},
> {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA,
> MOPT_SET | MOPT_Q},
> +#ifdef CONFIG_QUOTA_PROJECT
> + {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA,
> + MOPT_SET | MOPT_Q},
> +#else
> + {Opt_prjquota, 0, MOPT_NOSUPPORT},
> +#endif
> {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA |
> EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q},
> {Opt_usrjquota, 0, MOPT_Q},
> @@ -1463,10 +1473,14 @@ static int handle_mount_opt(struct super
> 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, &args[0]);
> 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:
> @@ -1692,19 +1706,28 @@ static int parse_options(char *options,
> }
> #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;
> @@ -1765,6 +1788,9 @@ static inline void ext4_show_quota_optio
>
> 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
> }
>
> @@ -2793,6 +2819,15 @@ static int ext4_feature_set_ok(struct su
> return 0;
> }
> #endif /* CONFIG_QUOTA */
> +#ifndef CONFIG_QUOTA_PROJECT
> + if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_PROJECT) &&
> + !readonly) {
> + ext4_msg(sb, KERN_ERR,
> + "Filesystem with quota feature cannot be mounted RDWR "
> + "without CONFIG_QUOTA_PROJECT");
> + return 0;
> + }
> +#endif
> return 1;
> }
>
> @@ -5011,6 +5046,48 @@ restore_opts:
> return err;
> }
>
> +#ifdef CONFIG_QUOTA_PROJECT
> +static int ext4_statfs_project(struct super_block *sb,
> + kprojid_t projid, struct kstatfs *buf)
> +{
I'd say statfs() implementation logically belongs to the previous patch.
But I don't have a strong opinion here.
Honza
--
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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