[XFS] Add support for project quota inheritance, a merge of Glens changes.
SGI-PV: 932952
SGI-Modid: xfs-linux:xfs-kern:22806a
Signed-off-by: Nathan Scott <nathans@sgi.com>
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 695978b..96dc18b 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -507,8 +507,6 @@
* that the group ID supplied to the chown() function
* shall be equal to either the group ID or one of the
* supplementary group IDs of the calling process.
- *
- * XXX: How does restricted_chown affect projid?
*/
if (restricted_chown &&
(iuid != uid || (igid != gid &&
@@ -860,6 +858,8 @@
di_flags |= XFS_DIFLAG_NOATIME;
if (vap->va_xflags & XFS_XFLAG_NODUMP)
di_flags |= XFS_DIFLAG_NODUMP;
+ if (vap->va_xflags & XFS_XFLAG_PROJINHERIT)
+ di_flags |= XFS_DIFLAG_PROJINHERIT;
if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
if (vap->va_xflags & XFS_XFLAG_RTINHERIT)
di_flags |= XFS_DIFLAG_RTINHERIT;
@@ -1915,7 +1915,9 @@
/* Return through std_return after this point. */
udqp = gdqp = NULL;
- if (vap->va_mask & XFS_AT_PROJID)
+ if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
+ prid = dp->i_d.di_projid;
+ else if (vap->va_mask & XFS_AT_PROJID)
prid = (xfs_prid_t)vap->va_projid;
else
prid = (xfs_prid_t)dfltprid;
@@ -2621,17 +2623,7 @@
if (src_vp->v_type == VDIR)
return XFS_ERROR(EPERM);
- /*
- * For now, manually find the XFS behavior descriptor for
- * the source vnode. If it doesn't exist then something
- * is wrong and we should just return an error.
- * Eventually we need to figure out how link is going to
- * work in the face of stacked vnodes.
- */
src_bdp = vn_bhv_lookup_unlocked(VN_BHV_HEAD(src_vp), &xfs_vnodeops);
- if (src_bdp == NULL) {
- return XFS_ERROR(EXDEV);
- }
sip = XFS_BHVTOI(src_bdp);
tdp = XFS_BHVTOI(target_dir_bdp);
mp = tdp->i_mount;
@@ -2698,6 +2690,17 @@
goto error_return;
}
+ /*
+ * If we are using project inheritance, we only allow hard link
+ * creation in our tree when the project IDs are the same; else
+ * the tree quota mechanism could be circumvented.
+ */
+ if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
+ (tdp->i_d.di_projid != sip->i_d.di_projid))) {
+ error = XFS_ERROR(EPERM);
+ goto error_return;
+ }
+
if (resblks == 0 &&
(error = XFS_DIR_CANENTER(mp, tp, tdp, target_name,
target_namelen)))
@@ -2820,7 +2823,9 @@
mp = dp->i_mount;
udqp = gdqp = NULL;
- if (vap->va_mask & XFS_AT_PROJID)
+ if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
+ prid = dp->i_d.di_projid;
+ else if (vap->va_mask & XFS_AT_PROJID)
prid = (xfs_prid_t)vap->va_projid;
else
prid = (xfs_prid_t)dfltprid;
@@ -3374,7 +3379,9 @@
/* Return through std_return after this point. */
udqp = gdqp = NULL;
- if (vap->va_mask & XFS_AT_PROJID)
+ if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
+ prid = dp->i_d.di_projid;
+ else if (vap->va_mask & XFS_AT_PROJID)
prid = (xfs_prid_t)vap->va_projid;
else
prid = (xfs_prid_t)dfltprid;