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authorNathan Scott <nathans@sgi.com>2006-06-09 15:29:58 +1000
committerNathan Scott <nathans@sgi.com>2006-06-09 15:29:58 +1000
commit932f2c323196c214e645d5a572a1d7b562c0f93f (patch)
tree3129798a4b60a90f55165030ec434ec106cd0373 /fs
parentb65745205fc00d8c7722ec74e9bd955f3861c7e2 (diff)
downloadlinux-932f2c323196c214e645d5a572a1d7b562c0f93f.tar.bz2
[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: Nathan Scott <nathans@sgi.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/quota/xfs_qm_bhv.c58
1 files changed, 57 insertions, 1 deletions
diff --git a/fs/xfs/quota/xfs_qm_bhv.c b/fs/xfs/quota/xfs_qm_bhv.c
index 6838b36d95a9..181dd90b29ce 100644
--- a/fs/xfs/quota/xfs_qm_bhv.c
+++ b/fs/xfs/quota/xfs_qm_bhv.c
@@ -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, },
};