nvme: Monitor uevent for device insert and remove
Change-Id: Ib47226d11a77eaa17a4e8a5e3e2c1a02c890f6ae Signed-off-by: Cunyin Chang <cunyin.chang@intel.com>
This commit is contained in:
Cunyin Chang
Ben Walker
parent
0e807fae27
commit
06c6d16cf8
@ -35,7 +35,7 @@ SPDK_ROOT_DIR := $(abspath $(CURDIR)/../..)
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include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
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CFLAGS += $(ENV_CFLAGS)
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C_SRCS = nvme_ctrlr_cmd.c nvme_ctrlr.c nvme_ns_cmd.c nvme_ns.c nvme_pcie.c nvme_qpair.c nvme.c nvme_quirks.c nvme_transport.c
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C_SRCS = nvme_ctrlr_cmd.c nvme_ctrlr.c nvme_ns_cmd.c nvme_ns.c nvme_pcie.c nvme_qpair.c nvme.c nvme_quirks.c nvme_transport.c nvme_uevent.c
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C_SRCS-$(CONFIG_RDMA) += nvme_rdma.c
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LIBNAME = nvme
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193
lib/nvme/nvme_uevent.c
Normal file
193
lib/nvme/nvme_uevent.c
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@ -0,0 +1,193 @@
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/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "spdk/log.h"
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#include "spdk/event.h"
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#include "nvme_uevent.h"
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#ifdef __linux__
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#include <stdlib.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <linux/netlink.h>
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#define SPDK_UEVENT_MSG_LEN 4096
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int
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spdk_uevent_connect(void)
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{
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struct sockaddr_nl addr;
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int ret;
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int netlink_fd;
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int size = 64 * 1024;
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int nonblock = 1;
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memset(&addr, 0, sizeof(addr));
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addr.nl_family = AF_NETLINK;
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addr.nl_pid = getpid();
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addr.nl_groups = 0xffffffff;
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netlink_fd = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
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if (netlink_fd < 0)
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return -1;
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setsockopt(netlink_fd, SOL_SOCKET, SO_RCVBUFFORCE, &size, sizeof(size));
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ret = ioctl(netlink_fd, FIONBIO, &nonblock);
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if (ret != 0) {
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SPDK_ERRLOG("ioctl(FIONBIO) failed\n");
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close(netlink_fd);
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return -1;
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}
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if (bind(netlink_fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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close(netlink_fd);
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return -1;
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}
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return netlink_fd;
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}
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/* Note: We only parse the event from uio subsystem and will ignore
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* all the event from other subsystem. the event from uio subsystem
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* as below:
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* action: "add" or "remove"
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* subsystem: "uio"
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* dev_path: "/devices/pci0000:80/0000:80:01.0/0000:81:00.0/uio/uio0"
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*/
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static int
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parse_event(const char *buf, struct spdk_uevent *event)
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{
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int ret;
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char action[SPDK_UEVENT_MSG_LEN];
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char subsystem[SPDK_UEVENT_MSG_LEN];
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char dev_path[SPDK_UEVENT_MSG_LEN];
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memset(action, 0, SPDK_UEVENT_MSG_LEN);
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memset(subsystem, 0, SPDK_UEVENT_MSG_LEN);
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memset(dev_path, 0, SPDK_UEVENT_MSG_LEN);
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while (*buf) {
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if (!strncmp(buf, "ACTION=", 7)) {
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buf += 7;
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strcpy(action, buf);
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} else if (!strncmp(buf, "DEVPATH=", 8)) {
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buf += 8;
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strcpy(dev_path, buf);
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} else if (!strncmp(buf, "SUBSYSTEM=", 10)) {
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buf += 10;
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strcpy(subsystem, buf);
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}
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while (*buf++)
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;
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}
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if (!strncmp(subsystem, "uio", 3)) {
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char *pci_address, *tmp;
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unsigned int domain, bus, dev, func;
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event->subsystem = SPDK_NVME_UEVENT_SUBSYSTEM_UIO;
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if (!strncmp(action, "add", 3)) {
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event->action = SPDK_NVME_UEVENT_ADD;
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}
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if (!strncmp(action, "remove", 6)) {
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event->action = SPDK_NVME_UEVENT_REMOVE;
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}
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tmp = strstr(dev_path, "/uio/");
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memset(tmp, 0, SPDK_UEVENT_MSG_LEN - (tmp - dev_path));
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pci_address = strrchr(dev_path, '/');
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pci_address++;
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ret = sscanf(pci_address, "%x:%x:%x.%x", &domain, &bus, &dev, &func);
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if (ret != 4) {
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SPDK_ERRLOG("Invalid format for NVMe BDF: %s\n", pci_address);
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}
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event->pci_addr.domain = domain;
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event->pci_addr.bus = bus;
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event->pci_addr.dev = dev;
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event->pci_addr.func = func;
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return 1;
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}
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return -1;
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}
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int
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spdk_get_uevent(int fd, struct spdk_uevent *uevent)
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{
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int ret;
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char buf[SPDK_UEVENT_MSG_LEN];
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memset(uevent, 0, sizeof(struct spdk_uevent));
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memset(buf, 0, SPDK_UEVENT_MSG_LEN);
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ret = recv(fd, buf, SPDK_UEVENT_MSG_LEN - 1, MSG_DONTWAIT);
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if (ret > 0) {
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return parse_event(buf, uevent);
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}
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if (ret < 0) {
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if (errno == EAGAIN || errno == EWOULDBLOCK) {
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return 0;
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} else {
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SPDK_ERRLOG("Socket read error(%d): %s\n", errno, strerror(errno));
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return -1;
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}
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}
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/* connection closed */
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if (ret == 0) {
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return -1;
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}
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return 0;
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}
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#else /* Not Linux */
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int
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spdk_uevent_connect(void)
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{
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return -1;
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}
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int
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spdk_get_uevent(int fd, struct spdk_uevent *uevent)
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{
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return -1;
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}
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#endif
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59
lib/nvme/nvme_uevent.h
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59
lib/nvme/nvme_uevent.h
Normal file
@ -0,0 +1,59 @@
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/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \file
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* SPDK uevent
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*/
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#include "spdk/env.h"
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#ifndef SPDK_UEVENT_H_
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#define SPDK_UEVENT_H_
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#define SPDK_NVME_UEVENT_SUBSYSTEM_UIO 1
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enum spdk_nvme_uevent_action {
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SPDK_NVME_UEVENT_ADD = 0,
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SPDK_NVME_UEVENT_REMOVE = 1,
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};
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struct spdk_uevent {
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enum spdk_nvme_uevent_action action;
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int subsystem;
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struct spdk_pci_addr pci_addr;
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};
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int spdk_uevent_connect(void);
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int spdk_get_uevent(int fd, struct spdk_uevent *uevent);
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#endif /* SPDK_UEVENT_H_ */
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