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Commit 932f2c32 authored by Nathan Scott's avatar Nathan Scott
Browse files

[XFS] statvfs component of directory/project quota support, code 


originally by Glen.

SGI-PV: 932952
SGI-Modid: xfs-linux-melb:xfs-kern:26105a

Signed-off-by: default avatarNathan Scott <nathans@sgi.com>
parent b6574520

fs/xfs/quota/xfs_qm_bhv.c

+57 −1
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2000-2005 Silicon Graphics, Inc.

 * Copyright (c) 2000-2006 Silicon Graphics, Inc.

 * All Rights Reserved.

 *

 * This program is free software; you can redistribute it and/or
@@ -185,6 +185,61 @@ xfs_qm_mount( 
	return error;

}



/*

 * Directory tree accounting is implemented using project quotas, where

 * the project identifier is inherited from parent directories.

 * A statvfs (df, etc.) of a directory that is using project quota should

 * return a statvfs of the project, not the entire filesystem.

 * This makes such trees appear as if they are filesystems in themselves.

 */

STATIC int

xfs_qm_statvfs(

	struct bhv_desc		*bhv,

	xfs_statfs_t		*statp,

	struct vnode		*vnode)

{

	xfs_mount_t		*mp;

	xfs_inode_t		*ip;

	xfs_dquot_t		*dqp;

	xfs_disk_dquot_t	*dp;

	__uint64_t		limit;

	int			error;



	error = PVFS_STATVFS(BHV_NEXT(bhv), statp, vnode);

	if (error || !vnode)

		return error;



	mp = XFS_BHVTOM(bhv);

	ip = xfs_vtoi(vnode);



	if (!(ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))

		return 0;

	if (!(mp->m_qflags & XFS_PQUOTA_ACCT))

		return 0;

	if (!(mp->m_qflags & XFS_OQUOTA_ENFD))

		return 0;



	if (xfs_qm_dqget(mp, NULL, ip->i_d.di_projid, XFS_DQ_PROJ, 0, &dqp))

		return 0;

	dp = &dqp->q_core;



	limit = dp->d_blk_softlimit ? dp->d_blk_softlimit : dp->d_blk_hardlimit;

	if (limit && statp->f_blocks > limit) {

		statp->f_blocks = limit;

		statp->f_bfree = (statp->f_blocks > dp->d_bcount) ?

					(statp->f_blocks - dp->d_bcount) : 0;

	}

	limit = dp->d_ino_softlimit ? dp->d_ino_softlimit : dp->d_ino_hardlimit;

	if (limit && statp->f_files > limit) {

		statp->f_files = limit;

		statp->f_ffree = (statp->f_files > dp->d_icount) ?

					(statp->f_ffree - dp->d_icount) : 0;

	}



	xfs_qm_dqput(dqp);

	return 0;

}



STATIC int

xfs_qm_syncall(

	struct bhv_desc		*bhv,
@@ -351,6 +406,7 @@ struct bhv_vfsops xfs_qmops = { { 
	.vfs_parseargs		= xfs_qm_parseargs,

	.vfs_showargs		= xfs_qm_showargs,

	.vfs_mount		= xfs_qm_mount,

	.vfs_statvfs		= xfs_qm_statvfs,

	.vfs_sync		= xfs_qm_syncall,

	.vfs_quotactl		= xfs_qm_quotactl, },

};