Commit 847aac64 authored by Li Xi's avatar Li Xi Committed by Jan Kara
Browse files

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: default avatarLi Xi <lixi@ddn.com>
Signed-off-by: default avatarDmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 5ce1aca8

fs/quota/dquot.c

+17 −3
Original line number Diff line number Diff line
@@ -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;

	}

fs/quota/quotaio_v2.h

+4 −2
Original line number Diff line number Diff line
@@ -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 */

include/linux/quota.h

+2 −0
Original line number Diff line number Diff line
@@ -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 */
@@ -319,6 +320,7 @@ 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;

include/uapi/linux/quota.h

+4 −2
Original line number Diff line number Diff line
@@ -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", \

};