update source to Ceph Pacific 16.2.2

[ceph.git] / ceph / src / spdk / module / bdev / ocf / utils.c

diff --git a/ceph/src/spdk/module/bdev/ocf/utils.c b/ceph/src/spdk/module/bdev/ocf/utils.c
new file mode 100644 (file)
index 0000000..3a1df3c
--- /dev/null
+++ b/ceph/src/spdk/module/bdev/ocf/utils.c
@@ -0,0 +1,136 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "spdk/stdinc.h"
+
+#include "utils.h"
+#include "vbdev_ocf.h"
+
+static char *cache_modes[ocf_cache_mode_max] = {
+       [ocf_cache_mode_wt] = "wt",
+       [ocf_cache_mode_wb] = "wb",
+       [ocf_cache_mode_wa] = "wa",
+       [ocf_cache_mode_pt] = "pt",
+       [ocf_cache_mode_wi] = "wi",
+       [ocf_cache_mode_wo] = "wo",
+};
+
+ocf_cache_mode_t
+ocf_get_cache_mode(const char *cache_mode)
+{
+       int i;
+
+       for (i = 0; i < ocf_cache_mode_max; i++) {
+               if (strcmp(cache_mode, cache_modes[i]) == 0) {
+                       return i;
+               }
+       }
+
+       return ocf_cache_mode_none;
+}
+
+const char *
+ocf_get_cache_modename(ocf_cache_mode_t mode)
+{
+       if (mode > ocf_cache_mode_none && mode < ocf_cache_mode_max) {
+               return cache_modes[mode];
+       } else {
+               return NULL;
+       }
+}
+
+int
+vbdev_ocf_mngt_start(struct vbdev_ocf *vbdev, vbdev_ocf_mngt_fn *path,
+                    vbdev_ocf_mngt_callback cb, void *cb_arg)
+{
+       if (vbdev->mngt_ctx.current_step) {
+               return -EBUSY;
+       }
+
+       memset(&vbdev->mngt_ctx, 0, sizeof(vbdev->mngt_ctx));
+
+       vbdev->mngt_ctx.current_step = path;
+       vbdev->mngt_ctx.cb = cb;
+       vbdev->mngt_ctx.cb_arg = cb_arg;
+
+       (*vbdev->mngt_ctx.current_step)(vbdev);
+
+       return 0;
+}
+
+void
+vbdev_ocf_mngt_stop(struct vbdev_ocf *vbdev, vbdev_ocf_mngt_fn *rollback_path, int status)
+{
+       if (status) {
+               vbdev->mngt_ctx.status = status;
+       }
+
+       if (vbdev->mngt_ctx.status && rollback_path) {
+               vbdev->mngt_ctx.poller_fn = NULL;
+               vbdev->mngt_ctx.current_step = rollback_path;
+               (*vbdev->mngt_ctx.current_step)(vbdev);
+               return;
+       }
+
+       if (vbdev->mngt_ctx.cb) {
+               vbdev->mngt_ctx.cb(vbdev->mngt_ctx.status, vbdev, vbdev->mngt_ctx.cb_arg);
+       }
+
+       memset(&vbdev->mngt_ctx, 0, sizeof(vbdev->mngt_ctx));
+}
+
+void
+vbdev_ocf_mngt_continue(struct vbdev_ocf *vbdev, int status)
+{
+       if (vbdev->mngt_ctx.current_step == NULL) {
+               return;
+       }
+
+       assert((*vbdev->mngt_ctx.current_step) != NULL);
+
+       vbdev->mngt_ctx.status = status;
+
+       vbdev->mngt_ctx.current_step++;
+       if (*vbdev->mngt_ctx.current_step) {
+               (*vbdev->mngt_ctx.current_step)(vbdev);
+               return;
+       }
+
+       vbdev_ocf_mngt_stop(vbdev, NULL, 0);
+}
+
+int
+vbdev_ocf_mngt_get_status(struct vbdev_ocf *vbdev)
+{
+       return vbdev->mngt_ctx.status;
+}