ceph: kill __ceph_removexattr()

when removing a xattr, generic_removexattr() calls __ceph_setxattr()
with NULL value and XATTR_REPLACE flag. __ceph_removexattr() is not
used any more.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 8966e9d96bdbd8dd19c5ec76b22d11f5ffb646d2..0d66722c6a52b4162253baed1db9dd9cb1bb23e3 100644 (file)
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -498,19 +498,6 @@ static int __remove_xattr(struct ceph_inode_info *ci,
        return 0;
 }
 
-static int __remove_xattr_by_name(struct ceph_inode_info *ci,
-                          const char *name)
-{
-       struct rb_node **p;
-       struct ceph_inode_xattr *xattr;
-       int err;
-
-       p = &ci->i_xattrs.index.rb_node;
-       xattr = __get_xattr(ci, name);
-       err = __remove_xattr(ci, xattr);
-       return err;
-}
-
 static char *__copy_xattr_names(struct ceph_inode_info *ci,
                                char *dest)
 {
@@ -1054,119 +1041,6 @@ out:
        return err;
 }
 
-static int ceph_send_removexattr(struct inode *inode, const char *name)
-{
-       struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
-       struct ceph_mds_client *mdsc = fsc->mdsc;
-       struct ceph_mds_request *req;
-       int err;
-
-       req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR,
-                                      USE_AUTH_MDS);
-       if (IS_ERR(req))
-               return PTR_ERR(req);
-       req->r_path2 = kstrdup(name, GFP_NOFS);
-       if (!req->r_path2)
-               return -ENOMEM;
-
-       req->r_inode = inode;
-       ihold(inode);
-       req->r_num_caps = 1;
-       req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
-       err = ceph_mdsc_do_request(mdsc, NULL, req);
-       ceph_mdsc_put_request(req);
-       return err;
-}
-
-static int __ceph_removexattr(struct inode *inode, const char *name)
-{
-       struct ceph_vxattr *vxattr;
-       struct ceph_inode_info *ci = ceph_inode(inode);
-       struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
-       struct ceph_cap_flush *prealloc_cf = NULL;
-       int issued;
-       int err;
-       int required_blob_size;
-       int dirty;
-       bool lock_snap_rwsem = false;
-
-       if (ceph_snap(inode) != CEPH_NOSNAP)
-               return -EROFS;
-
-       vxattr = ceph_match_vxattr(inode, name);
-       if (vxattr && vxattr->readonly)
-               return -EOPNOTSUPP;
-
-       /* pass any unhandled ceph.* xattrs through to the MDS */
-       if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN))
-               goto do_sync_unlocked;
-
-       prealloc_cf = ceph_alloc_cap_flush();
-       if (!prealloc_cf)
-               return -ENOMEM;
-
-       err = -ENOMEM;
-       spin_lock(&ci->i_ceph_lock);
-retry:
-       issued = __ceph_caps_issued(ci, NULL);
-       if (ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL))
-               goto do_sync;
-
-       if (!lock_snap_rwsem && !ci->i_head_snapc) {
-               lock_snap_rwsem = true;
-               if (!down_read_trylock(&mdsc->snap_rwsem)) {
-                       spin_unlock(&ci->i_ceph_lock);
-                       down_read(&mdsc->snap_rwsem);
-                       spin_lock(&ci->i_ceph_lock);
-                       goto retry;
-               }
-       }
-
-       dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued));
-
-       __build_xattrs(inode);
-
-       required_blob_size = __get_required_blob_size(ci, 0, 0);
-
-       if (!ci->i_xattrs.prealloc_blob ||
-           required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
-               struct ceph_buffer *blob;
-
-               spin_unlock(&ci->i_ceph_lock);
-               dout(" preaallocating new blob size=%d\n", required_blob_size);
-               blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
-               if (!blob)
-                       goto do_sync_unlocked;
-               spin_lock(&ci->i_ceph_lock);
-               if (ci->i_xattrs.prealloc_blob)
-                       ceph_buffer_put(ci->i_xattrs.prealloc_blob);
-               ci->i_xattrs.prealloc_blob = blob;
-               goto retry;
-       }
-
-       err = __remove_xattr_by_name(ceph_inode(inode), name);
-
-       dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL,
-                                      &prealloc_cf);
-       ci->i_xattrs.dirty = true;
-       inode->i_ctime = current_fs_time(inode->i_sb);
-       spin_unlock(&ci->i_ceph_lock);
-       if (lock_snap_rwsem)
-               up_read(&mdsc->snap_rwsem);
-       if (dirty)
-               __mark_inode_dirty(inode, dirty);
-       ceph_free_cap_flush(prealloc_cf);
-       return err;
-do_sync:
-       spin_unlock(&ci->i_ceph_lock);
-do_sync_unlocked:
-       if (lock_snap_rwsem)
-               up_read(&mdsc->snap_rwsem);
-       ceph_free_cap_flush(prealloc_cf);
-       err = ceph_send_removexattr(inode, name);
-       return err;
-}
-
 static int ceph_get_xattr_handler(const struct xattr_handler *handler,
                                  struct dentry *dentry, struct inode *inode,
                                  const char *name, void *value, size_t size)