X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fcommands%2Fenable_channels.c;h=039750bcb99dc8c7e95d902e5d26656eb3b8c3ea;hp=19b6b260bd7065e0b6490d8e247036483ecb14c6;hb=70d0b120691e90d81de7b38af8b845e261b5b40c;hpb=ca1c3607d2f5654163875cda874f43971df0f696 diff --git a/src/bin/lttng/commands/enable_channels.c b/src/bin/lttng/commands/enable_channels.c index 19b6b260b..039750bcb 100644 --- a/src/bin/lttng/commands/enable_channels.c +++ b/src/bin/lttng/commands/enable_channels.c @@ -1,19 +1,18 @@ /* * Copyright (C) 2011 - David Goulet * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; only version 2 - * of the License. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2 only, + * as published by the Free Software Foundation. * * This program is distributed in the hope that 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #define _GNU_SOURCE @@ -28,16 +27,18 @@ #include "../command.h" +#include +#include + static char *opt_channels; static int opt_kernel; static char *opt_session_name; static int opt_userspace; static struct lttng_channel chan; -#if 0 -/* Not implemented yet */ -static char *opt_cmd_name; -static pid_t opt_pid; -#endif +static char *opt_output; +static int opt_buffer_uid; +static int opt_buffer_pid; +static int opt_buffer_global; enum { OPT_HELP = 1, @@ -49,29 +50,34 @@ enum { OPT_READ_TIMER, OPT_USERSPACE, OPT_LIST_OPTIONS, + OPT_TRACEFILE_SIZE, + OPT_TRACEFILE_COUNT, }; static struct lttng_handle *handle; +const char *output_mmap = "mmap"; +const char *output_splice = "splice"; + static struct poptOption long_options[] = { /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, -#if 0 - /* Not implemented yet */ - {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, - {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, -#else {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, -#endif {"discard", 0, POPT_ARG_NONE, 0, OPT_DISCARD, 0, 0}, {"overwrite", 0, POPT_ARG_NONE, 0, OPT_OVERWRITE, 0, 0}, - {"subbuf-size", 0, POPT_ARG_DOUBLE, 0, OPT_SUBBUF_SIZE, 0, 0}, + {"subbuf-size", 0, POPT_ARG_STRING, 0, OPT_SUBBUF_SIZE, 0, 0}, {"num-subbuf", 0, POPT_ARG_INT, 0, OPT_NUM_SUBBUF, 0, 0}, {"switch-timer", 0, POPT_ARG_INT, 0, OPT_SWITCH_TIMER, 0, 0}, {"read-timer", 0, POPT_ARG_INT, 0, OPT_READ_TIMER, 0, 0}, {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, + {"output", 0, POPT_ARG_STRING, &opt_output, 0, 0, 0}, + {"buffers-uid", 0, POPT_ARG_VAL, &opt_buffer_uid, 1, 0, 0}, + {"buffers-pid", 0, POPT_ARG_VAL, &opt_buffer_pid, 1, 0, 0}, + {"buffers-global", 0, POPT_ARG_VAL, &opt_buffer_global, 1, 0, 0}, + {"tracefile-size", 'C', POPT_ARG_INT, 0, OPT_TRACEFILE_SIZE, 0, 0}, + {"tracefile-count", 'W', POPT_ARG_INT, 0, OPT_TRACEFILE_COUNT, 0, 0}, {0, 0, 0, 0, 0, 0, 0} }; @@ -80,38 +86,45 @@ static struct poptOption long_options[] = { */ static void usage(FILE *ofp) { - fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] [options] [channel_options]\n"); + fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] [-u|-k] [OPTIONS]\n"); fprintf(ofp, "\n"); + fprintf(ofp, "Options:\n"); fprintf(ofp, " -h, --help Show this help\n"); fprintf(ofp, " --list-options Simple listing of options\n"); - fprintf(ofp, " -s, --session Apply on session name\n"); - fprintf(ofp, " -k, --kernel Apply on the kernel tracer\n"); -#if 0 - fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n"); - fprintf(ofp, " If no CMD, the domain used is UST global\n"); - fprintf(ofp, " or else the domain is UST EXEC_NAME\n"); - fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n"); -#else - fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n"); -#endif + fprintf(ofp, " -s, --session NAME Apply to session name\n"); + fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n"); + fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n"); fprintf(ofp, "\n"); fprintf(ofp, "Channel options:\n"); fprintf(ofp, " --discard Discard event when buffers are full%s\n", DEFAULT_CHANNEL_OVERWRITE ? "" : " (default)"); fprintf(ofp, " --overwrite Flight recorder mode%s\n", DEFAULT_CHANNEL_OVERWRITE ? " (default)" : ""); - fprintf(ofp, " --subbuf-size Subbuffer size in bytes\n"); - fprintf(ofp, " (default: %u, kernel default: %u)\n", - DEFAULT_CHANNEL_SUBBUF_SIZE, - DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE); - fprintf(ofp, " --num-subbuf Number of subbufers\n"); - fprintf(ofp, " (default: %u, kernel default: %u)\n", - DEFAULT_CHANNEL_SUBBUF_NUM, - DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM); - fprintf(ofp, " --switch-timer Switch timer interval in usec (default: %u)\n", + fprintf(ofp, " --subbuf-size SIZE Subbuffer size in bytes {+k,+M,+G}\n"); + fprintf(ofp, " (default: %zu, kernel default: %zu)\n", + default_get_channel_subbuf_size(), + default_get_kernel_channel_subbuf_size()); + fprintf(ofp, " Needs to be a power of 2 for\n"); + fprintf(ofp, " kernel and ust tracers\n"); + fprintf(ofp, " --num-subbuf NUM Number of subbufers\n"); + fprintf(ofp, " (default: %u)\n", + DEFAULT_CHANNEL_SUBBUF_NUM); + fprintf(ofp, " Needs to be a power of 2 for\n"); + fprintf(ofp, " kernel and ust tracers\n"); + fprintf(ofp, " --switch-timer USEC Switch timer interval in usec (default: %u)\n", DEFAULT_CHANNEL_SWITCH_TIMER); - fprintf(ofp, " --read-timer Read timer interval in usec (default: %u)\n", - DEFAULT_CHANNEL_READ_TIMER); + fprintf(ofp, " --read-timer USEC Read timer interval in usec (UST default: %u, kernel default: %u)\n", + DEFAULT_UST_CHANNEL_READ_TIMER, DEFAULT_KERNEL_CHANNEL_READ_TIMER); + fprintf(ofp, " --output TYPE Channel output type (Values: %s, %s)\n", + output_mmap, output_splice); + fprintf(ofp, " --buffers-uid Use per UID buffer (-u only)\n"); + fprintf(ofp, " --buffers-pid Use per PID buffer (-u only)\n"); + fprintf(ofp, " --buffers-global Use shared buffer for the whole system (-k only)\n"); + fprintf(ofp, " -C, --tracefile-size SIZE\n"); + fprintf(ofp, " Maximum size of each tracefile within a stream (in bytes).\n"); + fprintf(ofp, " -W, --tracefile-count COUNT\n"); + fprintf(ofp, " Used in conjunction with -C option, this will limit the number\n"); + fprintf(ofp, " of files created to the specified count.\n"); fprintf(ofp, "\n"); } @@ -144,6 +157,12 @@ static void set_default_attr(struct lttng_domain *dom) if (chan.attr.output == -1) { chan.attr.output = default_attr.output; } + if (chan.attr.tracefile_count == -1) { + chan.attr.tracefile_count = default_attr.tracefile_count; + } + if (chan.attr.tracefile_size == -1) { + chan.attr.tracefile_size = default_attr.tracefile_size; + } } /* @@ -151,15 +170,33 @@ static void set_default_attr(struct lttng_domain *dom) */ static int enable_channel(char *session_name) { - int ret = CMD_SUCCESS; + int ret = CMD_SUCCESS, warn = 0; char *channel_name; struct lttng_domain dom; + memset(&dom, 0, sizeof(dom)); + /* Create lttng domain */ if (opt_kernel) { dom.type = LTTNG_DOMAIN_KERNEL; + dom.buf_type = LTTNG_BUFFER_GLOBAL; + if (opt_buffer_uid || opt_buffer_pid) { + ERR("Buffer type not supported for domain -k"); + ret = CMD_ERROR; + goto error; + } } else if (opt_userspace) { dom.type = LTTNG_DOMAIN_UST; + if (opt_buffer_uid) { + dom.buf_type = LTTNG_BUFFER_PER_UID; + } else { + if (opt_buffer_global) { + ERR("Buffer type not supported for domain -u"); + ret = CMD_ERROR; + goto error; + } + dom.buf_type = LTTNG_BUFFER_PER_PID; + } } else { ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); ret = CMD_ERROR; @@ -168,6 +205,30 @@ static int enable_channel(char *session_name) set_default_attr(&dom); + if ((chan.attr.tracefile_size > 0) && + (chan.attr.tracefile_size < chan.attr.subbuf_size)) { + ERR("Tracefile_size must be greater than or equal to subbuf_size " + "(%" PRIu64 " < %" PRIu64 ")", + chan.attr.tracefile_size, chan.attr.subbuf_size); + ret = CMD_ERROR; + goto error; + } + + /* Setting channel output */ + if (opt_output) { + if (!strncmp(output_mmap, opt_output, strlen(output_mmap))) { + chan.attr.output = LTTNG_EVENT_MMAP; + } else if (!strncmp(output_splice, opt_output, strlen(output_splice))) { + chan.attr.output = LTTNG_EVENT_SPLICE; + } else { + ERR("Unknown output type %s. Possible values are: %s, %s\n", + opt_output, output_mmap, output_splice); + usage(stderr); + ret = CMD_ERROR; + goto error; + } + } + handle = lttng_create_handle(session_name, &dom); if (handle == NULL) { ret = -1; @@ -185,7 +246,18 @@ static int enable_channel(char *session_name) ret = lttng_enable_channel(handle, &chan); if (ret < 0) { - goto error; + switch (-ret) { + case LTTNG_ERR_KERN_CHAN_EXIST: + case LTTNG_ERR_UST_CHAN_EXIST: + WARN("Channel %s: %s (session %s)", channel_name, + lttng_strerror(ret), session_name); + goto error; + default: + ERR("Channel %s: %s (session %s)", channel_name, + lttng_strerror(ret), session_name); + break; + } + warn = 1; } else { MSG("%s channel %s enabled for session %s", opt_kernel ? "Kernel" : "UST", channel_name, @@ -196,7 +268,13 @@ static int enable_channel(char *session_name) channel_name = strtok(NULL, ","); } + ret = CMD_SUCCESS; + error: + if (warn) { + ret = CMD_WARNING; + } + lttng_destroy_handle(handle); return ret; @@ -222,6 +300,7 @@ int cmd_enable_channels(int argc, const char **argv) int opt, ret = CMD_SUCCESS; static poptContext pc; char *session_name = NULL; + char *opt_arg = NULL; init_channel_config(); @@ -242,8 +321,22 @@ int cmd_enable_channels(int argc, const char **argv) DBG("Channel set to overwrite"); break; case OPT_SUBBUF_SIZE: - /* TODO Replace atol with strtol and check for errors */ - chan.attr.subbuf_size = atol(poptGetOptArg(pc)); + /* Parse the size */ + opt_arg = poptGetOptArg(pc); + if (utils_parse_size_suffix(opt_arg, &chan.attr.subbuf_size) < 0) { + ERR("Wrong value the --subbuf-size parameter: %s", opt_arg); + ret = CMD_ERROR; + goto end; + } + + /* Check if power of 2 */ + if ((chan.attr.subbuf_size - 1) & chan.attr.subbuf_size) { + ERR("The subbuf size is not a power of 2: %" PRIu64 " (%s)", + chan.attr.subbuf_size, opt_arg); + ret = CMD_ERROR; + goto end; + } + DBG("Channel subbuf size set to %" PRIu64, chan.attr.subbuf_size); break; case OPT_NUM_SUBBUF: @@ -264,6 +357,16 @@ int cmd_enable_channels(int argc, const char **argv) case OPT_USERSPACE: opt_userspace = 1; break; + case OPT_TRACEFILE_SIZE: + chan.attr.tracefile_size = atoll(poptGetOptArg(pc)); + DBG("Maximum tracefile size set to %" PRIu64, + chan.attr.tracefile_size); + break; + case OPT_TRACEFILE_COUNT: + chan.attr.tracefile_count = atoll(poptGetOptArg(pc)); + DBG("Maximum tracefile count set to %" PRIu64, + chan.attr.tracefile_count); + break; case OPT_LIST_OPTIONS: list_cmd_options(stdout, long_options); goto end; @@ -295,6 +398,9 @@ int cmd_enable_channels(int argc, const char **argv) ret = enable_channel(session_name); end: + if (!opt_session_name && session_name) { + free(session_name); + } poptFreeContext(pc); return ret; }