summaryrefslogtreecommitdiffstats
path: root/src/spdk/lib/scsi/dev.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/spdk/lib/scsi/dev.c415
1 files changed, 415 insertions, 0 deletions
diff --git a/src/spdk/lib/scsi/dev.c b/src/spdk/lib/scsi/dev.c
new file mode 100644
index 00000000..335ffacb
--- /dev/null
+++ b/src/spdk/lib/scsi/dev.c
@@ -0,0 +1,415 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
+ * 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 "scsi_internal.h"
+
+static struct spdk_scsi_dev g_devs[SPDK_SCSI_MAX_DEVS];
+
+struct spdk_scsi_dev *
+spdk_scsi_dev_get_list(void)
+{
+ return g_devs;
+}
+
+static struct spdk_scsi_dev *
+allocate_dev(void)
+{
+ struct spdk_scsi_dev *dev;
+ int i;
+
+ for (i = 0; i < SPDK_SCSI_MAX_DEVS; i++) {
+ dev = &g_devs[i];
+ if (!dev->is_allocated) {
+ memset(dev, 0, sizeof(*dev));
+ dev->id = i;
+ dev->is_allocated = 1;
+ return dev;
+ }
+ }
+
+ return NULL;
+}
+
+static void
+free_dev(struct spdk_scsi_dev *dev)
+{
+ assert(dev->is_allocated == 1);
+ assert(dev->removed == true);
+
+ dev->is_allocated = 0;
+}
+
+void
+spdk_scsi_dev_destruct(struct spdk_scsi_dev *dev)
+{
+ int lun_cnt;
+ int i;
+
+ if (dev == NULL || dev->removed) {
+ return;
+ }
+
+ dev->removed = true;
+ lun_cnt = 0;
+
+ for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
+ if (dev->lun[i] == NULL) {
+ continue;
+ }
+
+ /*
+ * LUN will remove itself from this dev when all outstanding IO
+ * is done. When no more LUNs, dev will be deleted.
+ */
+ spdk_scsi_lun_destruct(dev->lun[i]);
+ lun_cnt++;
+ }
+
+ if (lun_cnt == 0) {
+ free_dev(dev);
+ return;
+ }
+}
+
+static int
+spdk_scsi_dev_find_lowest_free_lun_id(struct spdk_scsi_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
+ if (dev->lun[i] == NULL) {
+ return i;
+ }
+ }
+
+ return -1;
+}
+
+int
+spdk_scsi_dev_add_lun(struct spdk_scsi_dev *dev, const char *bdev_name, int lun_id,
+ void (*hotremove_cb)(const struct spdk_scsi_lun *, void *),
+ void *hotremove_ctx)
+{
+ struct spdk_bdev *bdev;
+ struct spdk_scsi_lun *lun;
+
+ bdev = spdk_bdev_get_by_name(bdev_name);
+ if (bdev == NULL) {
+ SPDK_ERRLOG("device %s: cannot find bdev '%s' (target %d)\n",
+ dev->name, bdev_name, lun_id);
+ return -1;
+ }
+
+ /* Search the lowest free LUN ID if LUN ID is default */
+ if (lun_id == -1) {
+ lun_id = spdk_scsi_dev_find_lowest_free_lun_id(dev);
+ if (lun_id == -1) {
+ SPDK_ERRLOG("Free LUN ID is not found\n");
+ return -1;
+ }
+ }
+
+ lun = spdk_scsi_lun_construct(bdev, hotremove_cb, hotremove_ctx);
+ if (lun == NULL) {
+ return -1;
+ }
+
+ lun->id = lun_id;
+ lun->dev = dev;
+ dev->lun[lun_id] = lun;
+ return 0;
+}
+
+void
+spdk_scsi_dev_delete_lun(struct spdk_scsi_dev *dev,
+ struct spdk_scsi_lun *lun)
+{
+ int lun_cnt = 0;
+ int i;
+
+ for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
+ if (dev->lun[i] == lun) {
+ dev->lun[i] = NULL;
+ }
+
+ if (dev->lun[i]) {
+ lun_cnt++;
+ }
+ }
+
+ if (dev->removed == true && lun_cnt == 0) {
+ free_dev(dev);
+ }
+}
+
+/* This typedef exists to work around an astyle 2.05 bug.
+ * Remove it when astyle is fixed.
+ */
+typedef struct spdk_scsi_dev _spdk_scsi_dev;
+
+_spdk_scsi_dev *
+spdk_scsi_dev_construct(const char *name, const char *bdev_name_list[],
+ int *lun_id_list, int num_luns, uint8_t protocol_id,
+ void (*hotremove_cb)(const struct spdk_scsi_lun *, void *),
+ void *hotremove_ctx)
+{
+ struct spdk_scsi_dev *dev;
+ size_t name_len;
+ bool found_lun_0;
+ int i, rc;
+
+ name_len = strlen(name);
+ if (name_len > sizeof(dev->name) - 1) {
+ SPDK_ERRLOG("device %s: name longer than maximum allowed length %zu\n",
+ name, sizeof(dev->name) - 1);
+ return NULL;
+ }
+
+ if (num_luns == 0) {
+ SPDK_ERRLOG("device %s: no LUNs specified\n", name);
+ return NULL;
+ }
+
+ found_lun_0 = false;
+ for (i = 0; i < num_luns; i++) {
+ if (lun_id_list[i] == 0) {
+ found_lun_0 = true;
+ break;
+ }
+ }
+
+ if (!found_lun_0) {
+ SPDK_ERRLOG("device %s: no LUN 0 specified\n", name);
+ return NULL;
+ }
+
+ for (i = 0; i < num_luns; i++) {
+ if (bdev_name_list[i] == NULL) {
+ SPDK_ERRLOG("NULL spdk_scsi_lun for LUN %d\n",
+ lun_id_list[i]);
+ return NULL;
+ }
+ }
+
+ dev = allocate_dev();
+ if (dev == NULL) {
+ return NULL;
+ }
+
+ memcpy(dev->name, name, name_len + 1);
+
+ dev->num_ports = 0;
+ dev->protocol_id = protocol_id;
+
+ for (i = 0; i < num_luns; i++) {
+ rc = spdk_scsi_dev_add_lun(dev, bdev_name_list[i], lun_id_list[i],
+ hotremove_cb, hotremove_ctx);
+ if (rc < 0) {
+ spdk_scsi_dev_destruct(dev);
+ return NULL;
+ }
+ }
+
+ return dev;
+}
+
+void
+spdk_scsi_dev_queue_mgmt_task(struct spdk_scsi_dev *dev,
+ struct spdk_scsi_task *task,
+ enum spdk_scsi_task_func func)
+{
+ assert(task != NULL);
+
+ task->function = func;
+ spdk_scsi_lun_task_mgmt_execute(task, func);
+}
+
+void
+spdk_scsi_dev_queue_task(struct spdk_scsi_dev *dev,
+ struct spdk_scsi_task *task)
+{
+ assert(task != NULL);
+
+ spdk_scsi_lun_execute_task(task->lun, task);
+}
+
+static struct spdk_scsi_port *
+spdk_scsi_dev_find_free_port(struct spdk_scsi_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < SPDK_SCSI_DEV_MAX_PORTS; i++) {
+ if (!dev->port[i].is_used) {
+ return &dev->port[i];
+ }
+ }
+
+ return NULL;
+}
+
+int
+spdk_scsi_dev_add_port(struct spdk_scsi_dev *dev, uint64_t id, const char *name)
+{
+ struct spdk_scsi_port *port;
+ int rc;
+
+ if (dev->num_ports == SPDK_SCSI_DEV_MAX_PORTS) {
+ SPDK_ERRLOG("device already has %d ports\n", SPDK_SCSI_DEV_MAX_PORTS);
+ return -1;
+ }
+
+ port = spdk_scsi_dev_find_port_by_id(dev, id);
+ if (port != NULL) {
+ SPDK_ERRLOG("device already has port(%" PRIu64 ")\n", id);
+ return -1;
+ }
+
+ port = spdk_scsi_dev_find_free_port(dev);
+ if (port == NULL) {
+ assert(false);
+ return -1;
+ }
+
+ rc = spdk_scsi_port_construct(port, id, dev->num_ports, name);
+ if (rc != 0) {
+ return rc;
+ }
+
+ dev->num_ports++;
+ return 0;
+}
+
+int
+spdk_scsi_dev_delete_port(struct spdk_scsi_dev *dev, uint64_t id)
+{
+ struct spdk_scsi_port *port;
+
+ port = spdk_scsi_dev_find_port_by_id(dev, id);
+ if (port == NULL) {
+ SPDK_ERRLOG("device does not have specified port(%" PRIu64 ")\n", id);
+ return -1;
+ }
+
+ spdk_scsi_port_destruct(port);
+
+ dev->num_ports--;
+
+ return 0;
+}
+
+struct spdk_scsi_port *
+spdk_scsi_dev_find_port_by_id(struct spdk_scsi_dev *dev, uint64_t id)
+{
+ int i;
+
+ for (i = 0; i < SPDK_SCSI_DEV_MAX_PORTS; i++) {
+ if (!dev->port[i].is_used) {
+ continue;
+ }
+ if (dev->port[i].id == id) {
+ return &dev->port[i];
+ }
+ }
+
+ /* No matching port found. */
+ return NULL;
+}
+
+void
+spdk_scsi_dev_free_io_channels(struct spdk_scsi_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
+ if (dev->lun[i] == NULL) {
+ continue;
+ }
+ _spdk_scsi_lun_free_io_channel(dev->lun[i]);
+ }
+}
+
+int
+spdk_scsi_dev_allocate_io_channels(struct spdk_scsi_dev *dev)
+{
+ int i, rc;
+
+ for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
+ if (dev->lun[i] == NULL) {
+ continue;
+ }
+ rc = _spdk_scsi_lun_allocate_io_channel(dev->lun[i]);
+ if (rc < 0) {
+ spdk_scsi_dev_free_io_channels(dev);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+const char *
+spdk_scsi_dev_get_name(const struct spdk_scsi_dev *dev)
+{
+ return dev->name;
+}
+
+int
+spdk_scsi_dev_get_id(const struct spdk_scsi_dev *dev)
+{
+ return dev->id;
+}
+
+struct spdk_scsi_lun *
+spdk_scsi_dev_get_lun(struct spdk_scsi_dev *dev, int lun_id)
+{
+ if (lun_id < 0 || lun_id >= SPDK_SCSI_DEV_MAX_LUN) {
+ return NULL;
+ }
+
+ return dev->lun[lun_id];
+}
+
+bool
+spdk_scsi_dev_has_pending_tasks(const struct spdk_scsi_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; ++i) {
+ if (dev->lun[i] && spdk_scsi_lun_has_pending_tasks(dev->lun[i])) {
+ return true;
+ }
+ }
+
+ return false;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 00:08:38 +0000