[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_inode.c b/fs/xfs/xfs_inode.c
index a2c723b..34bdf59 100644 (file)
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1202,26 +1202,32 @@ xfs_ialloc(
        case S_IFREG:
        case S_IFDIR:
                if (unlikely(pip->i_d.di_flags & XFS_DIFLAG_ANY)) {
-                       if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) {
-                               if ((mode & S_IFMT) == S_IFDIR) {
-                                       ip->i_d.di_flags |= XFS_DIFLAG_RTINHERIT;
-                               } else {
-                                       ip->i_d.di_flags |= XFS_DIFLAG_REALTIME;
+                       uint    di_flags = 0;
+
+                       if ((mode & S_IFMT) == S_IFDIR) {
+                               if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT)
+                                       di_flags |= XFS_DIFLAG_RTINHERIT;
+                       } else {
+                               if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) {
+                                       di_flags |= XFS_DIFLAG_REALTIME;
                                        ip->i_iocore.io_flags |= XFS_IOCORE_RT;
                                }
                        }
                        if ((pip->i_d.di_flags & XFS_DIFLAG_NOATIME) &&
                            xfs_inherit_noatime)
-                               ip->i_d.di_flags |= XFS_DIFLAG_NOATIME;
+                               di_flags |= XFS_DIFLAG_NOATIME;
                        if ((pip->i_d.di_flags & XFS_DIFLAG_NODUMP) &&
                            xfs_inherit_nodump)
-                               ip->i_d.di_flags |= XFS_DIFLAG_NODUMP;
+                               di_flags |= XFS_DIFLAG_NODUMP;
                        if ((pip->i_d.di_flags & XFS_DIFLAG_SYNC) &&
                            xfs_inherit_sync)
-                               ip->i_d.di_flags |= XFS_DIFLAG_SYNC;
+                               di_flags |= XFS_DIFLAG_SYNC;
                        if ((pip->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) &&
                            xfs_inherit_nosymlinks)
-                               ip->i_d.di_flags |= XFS_DIFLAG_NOSYMLINKS;
+                               di_flags |= XFS_DIFLAG_NOSYMLINKS;
+                       if (pip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
+                               di_flags |= XFS_DIFLAG_PROJINHERIT;
+                       ip->i_d.di_flags |= di_flags;
                }
                /* FALLTHROUGH */
        case S_IFLNK:

diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 695978b..96dc18b 100644 (file)
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -507,8 +507,6 @@ xfs_setattr(
                 * 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 @@ xfs_setattr(
                                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 @@ xfs_create(
        /* 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 @@ xfs_link(
        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 @@ xfs_link(
                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 @@ xfs_mkdir(
 
        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 @@ xfs_symlink(
        /* 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;