From 847aac644e92e5624f2c153bab409bf713d5ff9a Mon Sep 17 00:00:00 2001 From: Li Xi Date: Thu, 19 Mar 2015 04:04:53 +0900 Subject: vfs: Add general support to enforce project quota limits 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 Signed-off-by: Dmitry Monakhov Reviewed-by: Jan Kara Signed-off-by: Jan Kara --- fs/quota/dquot.c | 20 +++++++++++++++++--- fs/quota/quotaio_v2.h | 6 ++++-- 2 files changed, 21 insertions(+), 5 deletions(-) (limited to 'fs/quota') diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 327a58448592..ecc25cf0ee6e 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -1163,8 +1163,8 @@ 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; } @@ -1405,6 +1405,9 @@ 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; @@ -1415,6 +1418,10 @@ static void __dquot_initialize(struct inode *inode, int type) */ if (dquots[cnt]) continue; + + if (!sb_has_quota_active(sb, cnt)) + continue; + init_needed = 1; switch (cnt) { @@ -1424,6 +1431,12 @@ 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); } @@ -2176,7 +2189,8 @@ 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; } 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 */ -- cgit v1.2.3