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fcrls.c
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fcrls.c
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/*
* Copyright(c) 2009 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
* Maintained at www.Open-FCoE.org
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <dirent.h>
#include <stdarg.h>
#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <linux/types.h>
typedef __u8 u8;
typedef __u16 u16;
typedef __u32 u32;
typedef __u64 u64;
#include <linux/bsg.h>
#include <scsi/sg.h>
#include "fc_els.h"
#include "scsi_bsg_fc.h"
#define ntoh24(n) (u32) ((n)[0] << 16 | (n)[1] << 8 | (n)[2])
#define hton24(h) { (h) >> 16 & 0xff, (h) >> 8 & 0xff, (h) & 0xff }
#define SYSFS_FC_RPORTS "/sys/class/fc_remote_ports"
struct rport_info {
int host_no;
int channel;
u32 number;
u32 port_id;
bool found;
bool online;
};
struct fcoe_fc_els_lesb {
__be32 lesb_link_fail; /* link failure count */
__be32 lesb_vlink_fail; /* virtual link failure count */
__be32 lesb_miss_fka; /* missing FIP keep-alive count */
__be32 lesb_symb_err; /* symbol error during carrier count */
__be32 lesb_err_block; /* errored block count */
__be32 lesb_fcs_error; /* frame check sequence error count */
} __attribute__((__packed__));
union rls_acc {
struct fc_els_lesb fs3;
struct fcoe_fc_els_lesb bb5;
} __attribute__((__packed__));
struct rls_rjt {
u8 er_resv;
u8 er_reason;
u8 er_explan;
u8 er_vendor;
} __attribute__((__packed__));
struct rls_rsp {
u8 rls_cmd;
u8 rls_resv[3];
union rls_acc acc;
struct rls_rjt rjt;
} __attribute__((__packed__));
static char *rjt_reason[] = {
[1] = "Invalid command code",
[2] = "Invalid version level",
[3] = "Logical error",
[4] = "Invalid CT_IU size",
[5] = "Logical busy",
[7] = "Protocol error",
[9] = "Unable to perform command request",
[0xB] = "Command not supported",
[0xD] = "Server not available",
[0xE] = "Session could not be established",
[0xFF] = "Vendor specific",
[0x100] = "N/A",
};
static char *rjt_explan[] = {
[0] = "No additional explanation",
[1] = "Port Identifier not registered",
[2] = "Port Name not registered",
[3] = "Node Name not registered",
[4] = "Class of Service not registered",
[6] = "Initial Process Associator not registered",
[7] = "FC-4 Types not registered",
[8] = "Symbolic Port Name not registered",
[9] = "Symbolic Node Name not registered",
[0xA] = "Port Type not registered",
[0xC] = "Fabric Port Name not registered",
[0xD] = "Hard Address not registered",
[0xF] = "FC-4 Features not registered",
[0x10] = "Access denied",
[0x11] = "Unacceptable Port Identifier",
[0x12] = "Data base empty",
[0x13] = "No object registered in the specified scope",
[0x14] = "Domain ID not present",
[0x15] = "Port number not present",
[0x16] = "No device attached",
[0x17] = "invalid OX_ID-RX_ID combination",
[0x19] = "Request already in progress",
[0x1e] = "N_Port login required",
[0x29] = "insufficient resources",
[0x2a] = "unable to supply requested data",
[0x2c] = "Request not supported",
[0x2d] = "Invalid payload length",
[0x44] = "Invalid Port/Node_Name",
[0x46] = "Login Extension not supported",
[0x48] = "Authentication required",
[0x50] = "Periodic Scan Value not allowed",
[0x51] = "Periodic Scanning not supported",
[0x60] = "MAC addressing mode not supported",
[0x61] = "Proposed MAC address incorrectly formed",
[0xf0] = "Authorization Exception",
[0xf1] = "Authentication Exception",
[0xf2] = "Data base full",
[0xf3] = "Data base empty",
[0xf4] = "Processing request",
[0xf5] = "Unable to verify connection",
[0xf6] = "Devices not in a common zone",
[0x100] = "N/A",
};
enum commands {
NONE = 0,
RLS_PORT,
RLS_FCID,
RLS_QUIET,
RLS_HELP,
};
/* RLS_QUIET */
static bool quiet;
/* : - has arg
* :: - has optional arg
* ; - arg is long opt
*/
static const struct option lopt[] = {
{ "port", required_argument, NULL, RLS_PORT },
{ "fcid", required_argument, NULL, RLS_FCID },
{ "quiet", no_argument, NULL, RLS_QUIET },
{ "help", no_argument, NULL, RLS_HELP },
{ NULL, 0, NULL, 0 },
};
static const char *lopt_usage[] = {
"rport bsg name, e.g., rport-7:0-1.",
"rport port FC_ID, e.g., 0xce000d.",
"disable verbose output.",
"print useage information.",
NULL,
};
#define bsg_error(format...) \
({ \
fprintf(stderr, "ERROR: " format); \
})
#define bsg_debug(format...) \
({ \
if (!quiet) \
printf("DEBUG: " format); \
})
static char *els_rjt2str(int type, int code)
{
char **str;
str = (type == 0) ? rjt_reason : rjt_explan;
if (code > 0xff)
code = 0x100;
if (!str[code])
code = 0x100;
return str[code];
}
static int els_print_lesb(struct fcoe_fc_els_lesb *lesb)
{
printf("RLS request accepted (LS_ACC), dumping status counters:\n"
"\tLink Failure Count = %u\n"
"\tVirtual Link Failure Count = %u\n"
"\tMissed Discovery Advertisement Count = %u\n"
"\tSymbol Error During Carrier Count = %u\n"
"\tErrored Block Count = %u\n"
"\tFrame Check Sequence Error Count = %u\n",
ntohl(lesb->lesb_link_fail),
ntohl(lesb->lesb_vlink_fail),
ntohl(lesb->lesb_miss_fka),
ntohl(lesb->lesb_symb_err),
ntohl(lesb->lesb_err_block),
ntohl(lesb->lesb_fcs_error));
return 0;
}
static int els_print_rjt(struct rls_rjt *rjt)
{
printf("RLS request rejected (LS_RJT), check reason code below:\n"
"\tReason Code = 0x%02x, %s.\n"
"\tExplain Code = 0x%02x, %s.\n",
rjt->er_reason, els_rjt2str(0, rjt->er_reason),
rjt->er_explan, els_rjt2str(1, rjt->er_explan));
if (rjt->er_reason == ELS_RJT_VENDOR)
printf("\tVendor Code = 0x%02x (check with your vendor).\n",
rjt->er_vendor);
return 0;
}
static int bsg_rport_els(int bsg, u8 els_code, void *req, int req_len,
void *rsp, int rsp_len)
{
int rc;
char sense[96];
struct fc_bsg_reply *reply = (struct fc_bsg_reply *)sense;
struct fc_bsg_request cdb = {
.msgcode = FC_BSG_RPT_ELS,
.rqst_data.r_els = {
.els_code = els_code,
}
};
struct sg_io_v4 sgio = {
.guard = 'Q',
.protocol = BSG_PROTOCOL_SCSI,
.subprotocol = BSG_SUB_PROTOCOL_SCSI_TRANSPORT,
.request_len = sizeof(cdb),
.request = (uintptr_t)&cdb,
.dout_xfer_len = req_len,
.dout_xferp = (uintptr_t)req,
.din_xfer_len = rsp_len,
.din_xferp = (uintptr_t)rsp,
.max_response_len = sizeof(sense),
.response = (uintptr_t)&sense,
.timeout = 1000,
};
memset(sense, 0, sizeof(sense));
rc = ioctl(bsg, SG_IO, &sgio);
bsg_debug("ioctl returned %d: bsg_reply result=%d\n",
rc, reply->result);
return rc;
}
static int bsg_rport_els_rls(int bsg, struct rport_info *rpi)
{
int rc = EOPNOTSUPP;
struct fc_els_rls rls = {
.rls_cmd = ELS_RLS,
.rls_port_id = hton24(rpi->port_id),
};
struct rls_rsp rsp;
memset(&rsp, 0, sizeof(rsp));
rc = bsg_rport_els(bsg, ELS_RLS, &rls, sizeof(rls), &rsp, sizeof(rsp));
if (rc) {
bsg_error("bsg_rport_els(ELS_RLS) failed\n");
return rc;
}
if (rsp.rls_cmd == ELS_LS_ACC)
return els_print_lesb(&rsp.acc.bb5);
if (rsp.rls_cmd == ELS_LS_RJT)
return els_print_rjt(&rsp.rjt);
bsg_error("Unknow response!\n");
return EIO;
}
static int rport_getid(struct rport_info *rpi)
{
FILE *f;
char rp_sysfs[256];
if (rpi->found)
return 0;
snprintf(rp_sysfs, sizeof(rp_sysfs), "%s/rport-%d:%d-%d/port_id",
SYSFS_FC_RPORTS, rpi->host_no, rpi->channel, rpi->number);
f = fopen(rp_sysfs, "ro");
if (!f) {
bsg_error("failed to fopen(%s)!\n", rp_sysfs);
return ENODEV;
}
if (1 != fscanf(f, "0x%6x", &rpi->port_id)) {
bsg_error("failed to fscanf(%s)\n", rp_sysfs);
fclose(f);
return ENODEV;
}
if (rpi->port_id & 0xff000000) {
bsg_error("rport %s:invalid fcid 0x%x\n", rp_sysfs,
rpi->port_id);
rpi->port_id = 0;
fclose(f);
return ENODEV;
}
fclose(f);
return 0;
}
/*
* parse a string in format of rport-%d:%d-%d, and get the
* corresponding rport info.
* rport-%d:%d-%d
*/
static int rport_parse(const char *s, struct rport_info *rpi)
{
if (!s)
return EINVAL;
memset(rpi, 0, sizeof(*rpi));
if (3 != sscanf(s, "rport-%d:%d-%d", &rpi->host_no, &rpi->channel,
&rpi->number))
return ENODEV;
if (rport_getid(rpi))
return ENODEV;
return 0;
}
#define RPORT_ONLINE "Online"
static int rport_check_state(struct rport_info *rpi)
{
FILE *f;
char rp_sysfs[256];
char rp_state[256];
rpi->online = false;
if (!rpi->found)
return EINVAL;
snprintf(rp_sysfs, sizeof(rp_sysfs), "%s/rport-%d:%d-%d/port_state",
SYSFS_FC_RPORTS, rpi->host_no, rpi->channel, rpi->number);
f = fopen(rp_sysfs, "ro");
if (!f) {
bsg_error("failed to fopen(%s)!\n", rp_sysfs);
return ENODEV;
}
if (!fgets(rp_state, sizeof(rp_state), f)) {
bsg_error("failed to fgets(%s)!\n", rp_sysfs);
fclose(f);
return ENODEV;
}
if (strncmp(rp_state, RPORT_ONLINE, strlen(RPORT_ONLINE))) {
bsg_error("rport 0x%x %s:must be %s\n", rpi->port_id,
rp_state, RPORT_ONLINE);
fclose(f);
return ENODEV;
}
rpi->online = true;
fclose(f);
return 0;
}
/* locate rport by fcid */
static int rport_find(struct rport_info *rpi)
{
int n;
struct dirent **namelist;
struct rport_info rpii;
if (rpi->found)
return 0;
if (!rpi->port_id)
return ENODEV;
n = scandir(SYSFS_FC_RPORTS, &namelist, 0, alphasort);
if (n < 0) {
bsg_error("failed to scandir %s\n", SYSFS_FC_RPORTS);
return ENODEV;
}
while (n--) {
if ((namelist[n]->d_type != DT_DIR) &&
(namelist[n]->d_type != DT_LNK))
goto free_name;
if (rport_parse(namelist[n]->d_name, &rpii))
goto free_name;
if (rpi->port_id != rpii.port_id)
goto free_name;
rpii.found = true;
memcpy(rpi, &rpii, sizeof(rpii));
bsg_debug("found rport 0x%06x as rport-%d:%d-%d\n",
rpi->port_id, rpi->host_no, rpi->channel,
rpi->number);
free_name:
free(namelist[n]);
}
free(namelist);
return 0;
}
static void bsg_usage(int status)
{
int i, n;
if (status)
bsg_error("Failed! %s (Errno %d)!\n", strerror(status), status);
n = sizeof(lopt)/sizeof(struct option) - 1;
printf("Usage: fcrls\n");
for (i = 0; i < n; i++)
printf("\t--%s: %s\n", lopt[i].name, lopt_usage[i]);
exit(status);
}
int main(int argc, char *argv[])
{
int rc = ENODEV;
int opt;
int bsg_dev;
char *endptr;
char *bsg_name = NULL;
struct rport_info rpi;
rpi.found = false;
while ((opt = getopt_long(argc, argv, "", lopt, NULL)) != -1) {
switch (opt) {
case RLS_PORT:
if (rport_parse(optarg, &rpi)) {
bsg_error("%s format incorrect, must be:"
"rport-host:channel-number\n",
optarg);
bsg_usage(EINVAL);
}
rpi.found = true;
goto out_rls;
case RLS_FCID:
rpi.found = false;
rpi.port_id = strtoull(optarg, &endptr, 16);
if (*endptr != '\0') {
bsg_error("%s has no valid FCID\n", optarg);
bsg_usage(EINVAL);
}
if (rport_find(&rpi)) {
bsg_error("%s is not a rport\n", optarg);
bsg_usage(ENODEV);
}
goto out_rls;
case RLS_QUIET:
quiet = true;
break;
case RLS_HELP:
bsg_usage(0);
break;
}
}
out_rls:
/* bsg device name */
if (!rpi.found)
bsg_usage(ENODEV);
if (asprintf(&bsg_name, "/dev/bsg/rport-%d:%d-%d",
rpi.host_no, rpi.channel, rpi.number) < 0) {
rc = ENOMEM;
bsg_error("not enough memory!\n");
goto out_error;
}
/* open bsg device */
bsg_dev = open(bsg_name, O_RDWR);
if (bsg_dev < 0) {
bsg_error("failed to open %s!\n", bsg_name);
goto out_free;
}
/* check port state */
if (rport_check_state(&rpi) || (!rpi.online)) {
bsg_error("rport 0x%x is not online!\n", rpi.port_id);
goto out_close;
}
/* send rls */
rc = bsg_rport_els_rls(bsg_dev, &rpi);
if (rc) {
bsg_error("Faild to bsg_rport_els_rls\n");
goto out_close;
}
rc = 0;
out_close:
close(bsg_dev);
out_free:
free(bsg_name);
out_error:
return rc;
}