afs: Implement YFS ACL setting
Implement the setting of YFS ACLs in AFS through the interface of setting
the afs.yfs.acl extended attribute on the file.
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/fs/afs/xattr.c b/fs/afs/xattr.c
index a5c82b0..c81f850 100644
--- a/fs/afs/xattr.c
+++ b/fs/afs/xattr.c
@@ -226,9 +226,58 @@ static int afs_xattr_get_yfs(const struct xattr_handler *handler,
return ret;
}
+/*
+ * Set a file's YFS ACL.
+ */
+static int afs_xattr_set_yfs(const struct xattr_handler *handler,
+ struct dentry *dentry,
+ struct inode *inode, const char *name,
+ const void *buffer, size_t size, int flags)
+{
+ struct afs_fs_cursor fc;
+ struct afs_vnode *vnode = AFS_FS_I(inode);
+ struct afs_acl *acl = NULL;
+ struct key *key;
+ int ret;
+
+ if (flags == XATTR_CREATE ||
+ strcmp(name, "acl") != 0)
+ return -EINVAL;
+
+ key = afs_request_key(vnode->volume->cell);
+ if (IS_ERR(key))
+ return PTR_ERR(key);
+
+ acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL);
+ if (!acl) {
+ key_put(key);
+ return -ENOMEM;
+ }
+
+ acl->size = size;
+ memcpy(acl->data, buffer, size);
+
+ ret = -ERESTARTSYS;
+ if (afs_begin_vnode_operation(&fc, vnode, key)) {
+ while (afs_select_fileserver(&fc)) {
+ fc.cb_break = afs_calc_vnode_cb_break(vnode);
+ yfs_fs_store_opaque_acl2(&fc, acl);
+ }
+
+ afs_check_for_remote_deletion(&fc, fc.vnode);
+ afs_vnode_commit_status(&fc, vnode, fc.cb_break);
+ ret = afs_end_vnode_operation(&fc);
+ }
+
+ kfree(acl);
+ key_put(key);
+ return ret;
+}
+
static const struct xattr_handler afs_xattr_yfs_handler = {
.prefix = "afs.yfs.",
.get = afs_xattr_get_yfs,
+ .set = afs_xattr_set_yfs,
};
/*