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event/app: add spdk_app_usage

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This allows applications to trigger printing of the
default SPDK command line option usage messages if
needed.  This could be useful in cases where the
app expects the user to specify a parameter and
finds the parameter was not specified after
spdk_app_parse_args() is finished.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I6f2ebdfe1488091a539830f9e78e342a6c601382

Reviewed-on: https://review.gerrithub.io/414472
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Jim Harris 2018-06-07 07:16:43 -07:00
parent d39e7f22b1
commit a2b5c37ac9
2 changed files with 39 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
include/spdk/event.h
View File

@ -236,6 +236,13 @@ spdk_app_parse_args_rvals_t spdk_app_parse_args(int argc, char **argv,
struct spdk_app_opts *opts, const char *getopt_str,
void (*parse)(int ch, char *arg), void (*usage)(void));
/**
* Print usage strings for common SPDK command line options.
*
* May only be called after spdk_app_parse_args().
*/
void spdk_app_usage(void);
/**
* Allocate an event to be passed to spdk_event_call().
*

48
lib/event/app.c
View File

@ -63,6 +63,8 @@ static struct spdk_event *g_shutdown_event = NULL;
static int g_init_lcore;
static bool g_delay_subsystem_init = false;
static bool g_shutdown_sig_received = false;
static char *g_executable_name;
static struct spdk_app_opts g_default_opts;
int
spdk_app_get_shm_id(void)
@ -614,11 +616,11 @@ spdk_app_stop(int rc)
}
static void
usage(char *executable_name, struct spdk_app_opts *default_opts, void (*app_usage)(void))
usage(void (*app_usage)(void))
{
printf("%s [options]\n", executable_name);
printf("%s [options]\n", g_executable_name);
printf("options:\n");
printf(" -c config config file (default %s)\n", default_opts->config_file);
printf(" -c config config file (default %s)\n", g_default_opts.config_file);
printf(" -d disable coredump file enabling\n");
printf(" -e mask tracepoint group mask for spdk trace buffers (default 0x0)\n");
printf(" -g force creating just one hugetlbfs file\n");
@ -630,8 +632,8 @@ usage(char *executable_name, struct spdk_app_opts *default_opts, void (*app_usag
printf(" -q disable notice level logging to stderr\n");
printf(" -r RPC listen address (default %s)\n", SPDK_DEFAULT_RPC_ADDR);
printf(" -s size memory size in MB for DPDK (default: ");
if (default_opts->mem_size > 0) {
printf("%dMB)\n", default_opts->mem_size);
if (g_default_opts.mem_size > 0) {
printf("%dMB)\n", g_default_opts.mem_size);
} else {
printf("all hugepage memory)\n");
}
@ -640,7 +642,9 @@ usage(char *executable_name, struct spdk_app_opts *default_opts, void (*app_usag
printf(" -B addr pci addr to blacklist\n");
printf(" -W addr pci addr to whitelist (-B and -W cannot be used at the same time)\n");
spdk_tracelog_usage(stdout, "-t");
app_usage();
if (app_usage) {
app_usage();
}
}
spdk_app_parse_args_rvals_t
@ -649,11 +653,10 @@ spdk_app_parse_args(int argc, char **argv, struct spdk_app_opts *opts,
void (*app_usage)(void))
{
int ch, rc;
struct spdk_app_opts default_opts;
char *getopt_str;
spdk_app_parse_args_rvals_t rval = SPDK_APP_PARSE_ARGS_SUCCESS;
memcpy(&default_opts, opts, sizeof(default_opts));
memcpy(&g_default_opts, opts, sizeof(g_default_opts));
if (opts->config_file && access(opts->config_file, F_OK) != 0) {
opts->config_file = NULL;
@ -666,6 +669,8 @@ spdk_app_parse_args(int argc, char **argv, struct spdk_app_opts *opts,
goto parse_early_fail;
}
g_executable_name = argv[0];
while ((ch = getopt(argc, argv, getopt_str)) != -1) {
switch (ch) {
case 'c':
@ -681,7 +686,7 @@ spdk_app_parse_args(int argc, char **argv, struct spdk_app_opts *opts,
opts->hugepage_single_segments = true;
break;
case 'h':
usage(argv[0], &default_opts, app_usage);
usage(app_usage);
rval = SPDK_APP_PARSE_ARGS_HELP;
goto parse_done;
case 'i':
@ -721,7 +726,7 @@ spdk_app_parse_args(int argc, char **argv, struct spdk_app_opts *opts,
rc = spdk_parse_capacity(optarg, &mem_size_mb, &mem_size_has_prefix);
if (rc != 0) {
fprintf(stderr, "invalid memory pool size `-s %s`\n", optarg);
usage(argv[0], &default_opts, app_usage);
usage(app_usage);
rval = SPDK_APP_PARSE_ARGS_FAIL;
goto parse_done;
}
@ -735,7 +740,7 @@ spdk_app_parse_args(int argc, char **argv, struct spdk_app_opts *opts,
if (mem_size_mb > INT_MAX) {
fprintf(stderr, "invalid memory pool size `-s %s`\n", optarg);
usage(argv[0], &default_opts, app_usage);
usage(app_usage);
rval = SPDK_APP_PARSE_ARGS_FAIL;
goto parse_done;
}
@ -747,7 +752,7 @@ spdk_app_parse_args(int argc, char **argv, struct spdk_app_opts *opts,
rc = spdk_log_set_trace_flag(optarg);
if (rc < 0) {
fprintf(stderr, "unknown flag\n");
usage(argv[0], &default_opts, app_usage);
usage(app_usage);
rval = SPDK_APP_PARSE_ARGS_FAIL;
goto parse_done;
}
@ -755,7 +760,7 @@ spdk_app_parse_args(int argc, char **argv, struct spdk_app_opts *opts,
#ifndef DEBUG
fprintf(stderr, "%s must be built with CONFIG_DEBUG=y for -t flag\n",
argv[0]);
usage(argv[0], &default_opts, app_usage);
usage(app_usage);
rval = SPDK_APP_PARSE_ARGS_FAIL;
goto parse_done;
#else
@ -771,7 +776,7 @@ spdk_app_parse_args(int argc, char **argv, struct spdk_app_opts *opts,
if (opts->pci_whitelist) {
free(opts->pci_whitelist);
fprintf(stderr, "-B and -W cannot be used at the same time\n");
usage(argv[0], &default_opts, app_usage);
usage(app_usage);
rval = SPDK_APP_PARSE_ARGS_FAIL;
goto parse_done;
}
@ -787,7 +792,7 @@ spdk_app_parse_args(int argc, char **argv, struct spdk_app_opts *opts,
if (opts->pci_blacklist) {
free(opts->pci_blacklist);
fprintf(stderr, "-B and -W cannot be used at the same time\n");
usage(argv[0], &default_opts, app_usage);
usage(app_usage);
rval = SPDK_APP_PARSE_ARGS_FAIL;
goto parse_done;
}
@ -805,7 +810,7 @@ spdk_app_parse_args(int argc, char **argv, struct spdk_app_opts *opts,
* in argv that is NOT in the getopt_str,
* getopt() will return a '?' indicating failure.
*/
usage(argv[0], &default_opts, app_usage);
usage(app_usage);
rval = SPDK_APP_PARSE_ARGS_FAIL;
goto parse_done;
default:
@ -827,6 +832,17 @@ parse_early_fail:
return rval;
}
void
spdk_app_usage(void)
{
if (g_executable_name == NULL) {
fprintf(stderr, "%s not valid before calling spdk_app_parse_args()\n", __func__);
return;
}
usage(NULL);
}
static void
spdk_rpc_start_subsystem_init_cpl(void *arg1, void *arg2)
{