This patch adds infrastructure for project quotas in generic vfs quota. User can query current usage and limits for all projects mapped into current user-namespace. Changing limits requires CAP_SYS_ADMIN in init user-namespace.
Signed-off-by: Konstantin Khlebnikov <[email protected]> --- fs/quota/dquot.c | 33 +++++++++++++++++++++++++++++++-- fs/quota/quota.c | 8 ++++++-- fs/quota/quotaio_v2.h | 6 ++++-- include/linux/quota.h | 1 + include/linux/quotaops.h | 1 + include/uapi/linux/quota.h | 6 ++++-- 6 files changed, 47 insertions(+), 8 deletions(-) diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 0ccd4ba3a246..04c27cdeca05 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; } @@ -1418,6 +1418,13 @@ static void __dquot_initialize(struct inode *inode, int type) case GRPQUOTA: qid = make_kqid_gid(inode->i_gid); break; + case PRJQUOTA: + if (sb->s_op->get_project) + qid = make_kqid_projid(sb->s_op-> + get_project(inode)); + else + qid = make_kqid_invalid(PRJQUOTA); + break; } got[cnt] = dqget(sb, qid); } @@ -1951,6 +1958,24 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr) EXPORT_SYMBOL(dquot_transfer); /* + * Helper function for transferring inode into another project. + */ +int dquot_transfer_project(struct inode *inode, kprojid_t projid) +{ + struct dquot *transfer_to[MAXQUOTAS] = {}; + struct super_block *sb = inode->i_sb; + int ret; + + if (!sb_has_quota_active(sb, PRJQUOTA)) + return 0; + transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(projid)); + ret = __dquot_transfer(inode, transfer_to); + dqput_all(transfer_to); + return ret; +} +EXPORT_SYMBOL(dquot_transfer_project); + +/* * Write info of quota file to disk */ int dquot_commit_info(struct super_block *sb, int type) @@ -2165,6 +2190,10 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id, error = -EINVAL; goto out_fmt; } + if (type == PRJQUOTA && !sb->s_op->get_project) { + error = -EINVAL; + goto out_fmt; + } /* Usage always has to be set... */ if (!(flags & DQUOT_USAGE_ENABLED)) { error = -EINVAL; diff --git a/fs/quota/quota.c b/fs/quota/quota.c index d14a799c7785..0acd1bb4bafd 100644 --- a/fs/quota/quota.c +++ b/fs/quota/quota.c @@ -30,11 +30,15 @@ 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 user/group dquots we "own". + * Allow querying project quota present in our user-namespace. + */ case Q_GETQUOTA: case Q_XGETQUOTA: if ((type == USRQUOTA && uid_eq(current_euid(), make_kuid(current_user_ns(), id))) || - (type == GRPQUOTA && in_egroup_p(make_kgid(current_user_ns(), id)))) + (type == GRPQUOTA && in_egroup_p(make_kgid(current_user_ns(), id))) || + (type == PRJQUOTA && projid_valid(make_kprojid(current_user_ns(), id)))) break; /*FALLTHROUGH*/ default: diff --git a/fs/quota/quotaio_v2.h b/fs/quota/quotaio_v2.h index f1966b42c2fd..4e95430093d9 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 d534e8ed308a..8bad159a268b 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 */ diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h index df73258cca47..ba54745fe408 100644 --- a/include/linux/quotaops.h +++ b/include/linux/quotaops.h @@ -104,6 +104,7 @@ int dquot_set_dqblk(struct super_block *sb, struct kqid id, int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); int dquot_transfer(struct inode *inode, struct iattr *iattr); +int dquot_transfer_project(struct inode *inode, kprojid_t projid); static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) { diff --git a/include/uapi/linux/quota.h b/include/uapi/linux/quota.h index 1f49b8341c99..9c95b2c1c88a 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", \ }; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
