fs: provide rcu-walk aware permission i_ops

[linux-2.6-microblaze.git] / fs / gfs2 / ops_inode.c

diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index f28f897..5c63a06 100644 (file)
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -166,7 +166,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
        if (error)
                goto out_child;
 
-       error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
+       error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC, 0);
        if (error)
                goto out_gunlock;
 
@@ -289,7 +289,7 @@ static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
        if (IS_APPEND(&dip->i_inode))
                return -EPERM;
 
-       error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
+       error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, 0);
        if (error)
                return error;
 
@@ -822,7 +822,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
                        }
                }
        } else {
-               error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
+               error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC, 0);
                if (error)
                        goto out_gunlock;
 
@@ -857,7 +857,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
        /* Check out the dir to be renamed */
 
        if (dir_rename) {
-               error = gfs2_permission(odentry->d_inode, MAY_WRITE);
+               error = gfs2_permission(odentry->d_inode, MAY_WRITE, 0);
                if (error)
                        goto out_gunlock;
        }
@@ -1041,13 +1041,17 @@ static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
  * Returns: errno
  */
 
-int gfs2_permission(struct inode *inode, int mask)
+int gfs2_permission(struct inode *inode, int mask, unsigned int flags)
 {
-       struct gfs2_inode *ip = GFS2_I(inode);
+       struct gfs2_inode *ip;
        struct gfs2_holder i_gh;
        int error;
        int unlock = 0;
 
+       if (flags & IPERM_FLAG_RCU)
+               return -ECHILD;
+
+       ip = GFS2_I(inode);
        if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
                error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
                if (error)
@@ -1058,7 +1062,7 @@ int gfs2_permission(struct inode *inode, int mask)
        if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
                error = -EACCES;
        else
-               error = generic_permission(inode, mask, gfs2_check_acl);
+               error = generic_permission(inode, mask, flags, gfs2_check_acl);
        if (unlock)
                gfs2_glock_dq_uninit(&i_gh);