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Message-ID: <20150421115624.GG24278@quack.suse.cz>
Date: Tue, 21 Apr 2015 13:56:24 +0200
From: Jan Kara <jack@...e.cz>
To: Li Xi <pkuelelixi@...il.com>
Cc: linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
linux-api@...r.kernel.org, tytso@....edu, adilger@...ger.ca,
jack@...e.cz, viro@...iv.linux.org.uk, hch@...radead.org,
dmonakhov@...nvz.org
Subject: Re: [v13 1/5] vfs: adds general codes to enforces project quota
limits
On Mon 20-04-15 10:39:44, Li Xi wrote:
> This patch adds support for a new quota type PRJQUOTA for project quota
> enforcement. Also a new method get_projid() is added into dquot_operations
> structure.
>
> Signed-off-by: Li Xi <lixi@....com>
> Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org>
> Reviewed-by: Jan Kara <jack@...e.cz>
This patch is now upstream as commit
847aac644e92e5624f2c153bab409bf713d5ff9a. So you don't have to send it
in the next posting if you rebase on top of latest Linus' tree.
Honza
> ---
> fs/quota/dquot.c | 35 ++++++++++++++++++++++++++++++-----
> fs/quota/quota.c | 5 ++++-
> fs/quota/quotaio_v2.h | 6 ++++--
> include/linux/quota.h | 2 ++
> include/uapi/linux/quota.h | 6 ++++--
> 5 files changed, 44 insertions(+), 10 deletions(-)
>
> diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
> index 8f0acef..a02bb68 100644
> --- a/fs/quota/dquot.c
> +++ b/fs/quota/dquot.c
> @@ -1159,8 +1159,8 @@ static int need_print_warning(struct dquot_warn *warn)
> return uid_eq(current_fsuid(), warn->w_dq_id.uid);
> case GRPQUOTA:
> return in_group_p(warn->w_dq_id.gid);
> - case PRJQUOTA: /* Never taken... Just make gcc happy */
> - return 0;
> + case PRJQUOTA:
> + return 1;
> }
> return 0;
> }
> @@ -1399,6 +1399,9 @@ static void __dquot_initialize(struct inode *inode, int type)
> /* First get references to structures we might need. */
> for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
> struct kqid qid;
> + kprojid_t projid;
> + int rc;
> +
> got[cnt] = NULL;
> if (type != -1 && cnt != type)
> continue;
> @@ -1409,6 +1412,10 @@ static void __dquot_initialize(struct inode *inode, int type)
> */
> if (i_dquot(inode)[cnt])
> continue;
> +
> + if (!sb_has_quota_active(sb, cnt))
> + continue;
> +
> init_needed = 1;
>
> switch (cnt) {
> @@ -1418,6 +1425,12 @@ static void __dquot_initialize(struct inode *inode, int type)
> case GRPQUOTA:
> qid = make_kqid_gid(inode->i_gid);
> break;
> + case PRJQUOTA:
> + rc = inode->i_sb->dq_op->get_projid(inode, &projid);
> + if (rc)
> + continue;
> + qid = make_kqid_projid(projid);
> + break;
> }
> got[cnt] = dqget(sb, qid);
> }
> @@ -2161,7 +2174,8 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id,
> error = -EROFS;
> goto out_fmt;
> }
> - if (!sb->s_op->quota_write || !sb->s_op->quota_read) {
> + if (!sb->s_op->quota_write || !sb->s_op->quota_read ||
> + (type == PRJQUOTA && sb->dq_op->get_projid == NULL)) {
> error = -EINVAL;
> goto out_fmt;
> }
> @@ -2402,8 +2416,19 @@ static void do_get_dqblk(struct dquot *dquot, struct fs_disk_quota *di)
>
> memset(di, 0, sizeof(*di));
> di->d_version = FS_DQUOT_VERSION;
> - di->d_flags = dquot->dq_id.type == USRQUOTA ?
> - FS_USER_QUOTA : FS_GROUP_QUOTA;
> + switch (dquot->dq_id.type) {
> + case USRQUOTA:
> + di->d_flags = FS_USER_QUOTA;
> + break;
> + case GRPQUOTA:
> + di->d_flags = FS_GROUP_QUOTA;
> + break;
> + case PRJQUOTA:
> + di->d_flags = FS_PROJ_QUOTA;
> + break;
> + default:
> + BUG();
> + }
> di->d_id = from_kqid_munged(current_user_ns(), dquot->dq_id);
>
> spin_lock(&dq_data_lock);
> diff --git a/fs/quota/quota.c b/fs/quota/quota.c
> index 2aa4151..33b30b1 100644
> --- a/fs/quota/quota.c
> +++ b/fs/quota/quota.c
> @@ -30,7 +30,10 @@ static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
> case Q_XGETQSTATV:
> case Q_XQUOTASYNC:
> break;
> - /* allow to query information for dquots we "own" */
> + /*
> + * allow to query information for dquots we "own"
> + * always allow querying project quota
> + */
> case Q_GETQUOTA:
> case Q_XGETQUOTA:
> if ((type == USRQUOTA && uid_eq(current_euid(), make_kuid(current_user_ns(), id))) ||
> diff --git a/fs/quota/quotaio_v2.h b/fs/quota/quotaio_v2.h
> index f1966b4..4e95430 100644
> --- a/fs/quota/quotaio_v2.h
> +++ b/fs/quota/quotaio_v2.h
> @@ -13,12 +13,14 @@
> */
> #define V2_INITQMAGICS {\
> 0xd9c01f11, /* USRQUOTA */\
> - 0xd9c01927 /* GRPQUOTA */\
> + 0xd9c01927, /* GRPQUOTA */\
> + 0xd9c03f14, /* PRJQUOTA */\
> }
>
> #define V2_INITQVERSIONS {\
> 1, /* USRQUOTA */\
> - 1 /* GRPQUOTA */\
> + 1, /* GRPQUOTA */\
> + 1, /* PRJQUOTA */\
> }
>
> /* First generic header */
> diff --git a/include/linux/quota.h b/include/linux/quota.h
> index 50978b7..ba51f7e 100644
> --- a/include/linux/quota.h
> +++ b/include/linux/quota.h
> @@ -50,6 +50,7 @@
>
> #undef USRQUOTA
> #undef GRPQUOTA
> +#undef PRJQUOTA
> enum quota_type {
> USRQUOTA = 0, /* element used for user quotas */
> GRPQUOTA = 1, /* element used for group quotas */
> @@ -317,6 +318,7 @@ struct dquot_operations {
> /* get reserved quota for delayed alloc, value returned is managed by
> * quota code only */
> qsize_t *(*get_reserved_space) (struct inode *);
> + int (*get_projid) (struct inode *, kprojid_t *);/* Get project ID */
> };
>
> struct path;
> diff --git a/include/uapi/linux/quota.h b/include/uapi/linux/quota.h
> index 3b6cfbe..b2d9486 100644
> --- a/include/uapi/linux/quota.h
> +++ b/include/uapi/linux/quota.h
> @@ -36,11 +36,12 @@
> #include <linux/errno.h>
> #include <linux/types.h>
>
> -#define __DQUOT_VERSION__ "dquot_6.5.2"
> +#define __DQUOT_VERSION__ "dquot_6.6.0"
>
> -#define MAXQUOTAS 2
> +#define MAXQUOTAS 3
> #define USRQUOTA 0 /* element used for user quotas */
> #define GRPQUOTA 1 /* element used for group quotas */
> +#define PRJQUOTA 2 /* element used for project quotas */
>
> /*
> * Definitions for the default names of the quotas files.
> @@ -48,6 +49,7 @@
> #define INITQFNAMES { \
> "user", /* USRQUOTA */ \
> "group", /* GRPQUOTA */ \
> + "project", /* PRJQUOTA */ \
> "undefined", \
> };
>
> --
> 1.7.1
>
--
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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