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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/spdk/lib/notify/notify.c | |
parent | Initial commit. (diff) | |
download | ceph-6d07fdb6bb33b1af39833b850bb6cf8af79fe293.tar.xz ceph-6d07fdb6bb33b1af39833b850bb6cf8af79fe293.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/spdk/lib/notify/notify.c')
-rw-r--r-- | src/spdk/lib/notify/notify.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/spdk/lib/notify/notify.c b/src/spdk/lib/notify/notify.c new file mode 100644 index 000000000..88c5d633b --- /dev/null +++ b/src/spdk/lib/notify/notify.c @@ -0,0 +1,150 @@ +/*- + * 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 <sys/queue.h> + +#include "spdk/stdinc.h" +#include "spdk/util.h" +#include "spdk/queue.h" +#include "spdk/string.h" +#include "spdk/log.h" + +#include "spdk/notify.h" + +#define SPDK_NOTIFY_MAX_EVENTS 1024 + +struct spdk_notify_type { + char name[SPDK_NOTIFY_MAX_NAME_SIZE]; + TAILQ_ENTRY(spdk_notify_type) tailq; +}; + +pthread_mutex_t g_events_lock = PTHREAD_MUTEX_INITIALIZER; +static struct spdk_notify_event g_events[SPDK_NOTIFY_MAX_EVENTS]; +static uint64_t g_events_head; + +static TAILQ_HEAD(, spdk_notify_type) g_notify_types = TAILQ_HEAD_INITIALIZER(g_notify_types); + +struct spdk_notify_type * +spdk_notify_type_register(const char *type) +{ + struct spdk_notify_type *it = NULL; + + if (!type) { + SPDK_ERRLOG("Invalid notification type %p\n", type); + return NULL; + } else if (!type[0] || strlen(type) >= SPDK_NOTIFY_MAX_NAME_SIZE) { + SPDK_ERRLOG("Notification type '%s' too short or too long\n", type); + return NULL; + } + + pthread_mutex_lock(&g_events_lock); + TAILQ_FOREACH(it, &g_notify_types, tailq) { + if (strcmp(type, it->name) == 0) { + SPDK_NOTICELOG("Notification type '%s' already registered.\n", type); + goto out; + } + } + + it = calloc(1, sizeof(*it)); + if (it == NULL) { + goto out; + } + + snprintf(it->name, sizeof(it->name), "%s", type); + TAILQ_INSERT_TAIL(&g_notify_types, it, tailq); + +out: + pthread_mutex_unlock(&g_events_lock); + return it; +} + +const char * +spdk_notify_type_get_name(const struct spdk_notify_type *type) +{ + return type->name; +} + + +void +spdk_notify_foreach_type(spdk_notify_foreach_type_cb cb, void *ctx) +{ + struct spdk_notify_type *it; + + pthread_mutex_lock(&g_events_lock); + TAILQ_FOREACH(it, &g_notify_types, tailq) { + if (cb(it, ctx)) { + break; + } + } + pthread_mutex_unlock(&g_events_lock); +} + +uint64_t +spdk_notify_send(const char *type, const char *ctx) +{ + uint64_t head; + struct spdk_notify_event *ev; + + pthread_mutex_lock(&g_events_lock); + head = g_events_head; + g_events_head++; + + ev = &g_events[head % SPDK_NOTIFY_MAX_EVENTS]; + spdk_strcpy_pad(ev->type, type, sizeof(ev->type), '\0'); + spdk_strcpy_pad(ev->ctx, ctx, sizeof(ev->ctx), '\0'); + pthread_mutex_unlock(&g_events_lock); + + return head; +} + +uint64_t +spdk_notify_foreach_event(uint64_t start_idx, uint64_t max, + spdk_notify_foreach_event_cb cb_fn, void *ctx) +{ + uint64_t i; + + pthread_mutex_lock(&g_events_lock); + + if (g_events_head > SPDK_NOTIFY_MAX_EVENTS && start_idx < g_events_head - SPDK_NOTIFY_MAX_EVENTS) { + start_idx = g_events_head - SPDK_NOTIFY_MAX_EVENTS; + } + + for (i = 0; start_idx < g_events_head && i < max; start_idx++, i++) { + if (cb_fn(start_idx, &g_events[start_idx % SPDK_NOTIFY_MAX_EVENTS], ctx)) { + break; + } + } + pthread_mutex_unlock(&g_events_lock); + + return i; +} |