Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...

[tomoyo/tomoyo-test1.git] / fs / ceph / xattr.c

diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 9e6734e..a76f697 100644 (file)
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -820,6 +820,7 @@ int ceph_removexattr(struct dentry *dentry, const char *name)
        struct ceph_vxattr_cb *vxattrs = ceph_inode_vxattrs(inode);
        int issued;
        int err;
+       int required_blob_size;
        int dirty;
 
        if (ceph_snap(inode) != CEPH_NOSNAP)
@@ -835,14 +836,34 @@ int ceph_removexattr(struct dentry *dentry, const char *name)
                        return -EOPNOTSUPP;
        }
 
+       err = -ENOMEM;
        spin_lock(&ci->i_ceph_lock);
        __build_xattrs(inode);
+retry:
        issued = __ceph_caps_issued(ci, NULL);
        dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued));
 
        if (!(issued & CEPH_CAP_XATTR_EXCL))
                goto do_sync;
 
+       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 out;
+               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);
        ci->i_xattrs.dirty = true;
@@ -855,6 +876,7 @@ int ceph_removexattr(struct dentry *dentry, const char *name)
 do_sync:
        spin_unlock(&ci->i_ceph_lock);
        err = ceph_send_removexattr(dentry, name);
+out:
        return err;
 }