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nvmf_tgt: update the discovery generation count

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This allows hosts to determine when the discovery log page has changed
when reading it across multiple Get Log Page calls.

Change-Id: I3c3459959c6246a88938e4f82e3e0046419e7d00
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This commit is contained in:
Daniel Verkamp 2016-12-13 12:37:08 -07:00
parent ec591eaf41
commit 86fc646fac
2 changed files with 6 additions and 5 deletions
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5
lib/nvmf/request.c
View File

@ -100,11 +100,6 @@ nvmf_process_discovery_cmd(struct spdk_nvmf_request *req)
case SPDK_NVME_OPC_GET_LOG_PAGE:
if ((cmd->cdw10 & 0xFF) == SPDK_NVME_LOG_DISCOVERY) {
log = (struct spdk_nvmf_discovery_log_page *)req->data;
/*
* Does not support change discovery
* information at runtime now.
*/
log->genctr = 0;
log->numrec = 0;
spdk_format_discovery_log(log, req->length);
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;

6
lib/nvmf/subsystem.c
View File

@ -46,6 +46,7 @@
#include "spdk_internal/log.h"
static TAILQ_HEAD(, spdk_nvmf_subsystem) g_subsystems = TAILQ_HEAD_INITIALIZER(g_subsystems);
static uint64_t g_discovery_genctr = 0;
bool
spdk_nvmf_subsystem_exists(const char *subnqn)
@ -184,6 +185,7 @@ spdk_nvmf_create_subsystem(const char *nqn,
}
TAILQ_INSERT_TAIL(&g_subsystems, subsystem, entries);
g_discovery_genctr++;
return subsystem;
}
@ -226,6 +228,7 @@ spdk_nvmf_delete_subsystem(struct spdk_nvmf_subsystem *subsystem)
}
TAILQ_REMOVE(&g_subsystems, subsystem, entries);
g_discovery_genctr++;
free(subsystem);
}
@ -271,6 +274,7 @@ spdk_nvmf_subsystem_add_listener(struct spdk_nvmf_subsystem *subsystem,
TAILQ_INSERT_HEAD(&subsystem->listen_addrs, listen_addr, link);
subsystem->num_listen_addrs++;
g_discovery_genctr++;
rc = transport->listen_addr_add(listen_addr);
if (rc < 0) {
@ -298,6 +302,7 @@ spdk_nvmf_subsystem_add_host(struct spdk_nvmf_subsystem *subsystem, char *host_n
TAILQ_INSERT_HEAD(&subsystem->hosts, host, link);
subsystem->num_hosts++;
g_discovery_genctr++;
return 0;
}
@ -355,6 +360,7 @@ spdk_format_discovery_log(struct spdk_nvmf_discovery_log_page *disc_log, uint32_
}
disc_log->numrec = numrec;
disc_log->genctr = g_discovery_genctr;
}
int