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

Browse Source 
originally by Glen.

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

Signed-off-by: Nathan Scott <nathans@sgi.com>
This commit is contained in:
Nathan Scott 2006-06-09 15:29:58 +10:00
parent b65745205f
commit 932f2c3231
1 changed files with 57 additions and 1 deletions
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58
fs/xfs/quota/xfs_qm_bhv.c
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@ -1,5 +1,5 @@
/*
* 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, },
};