X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fswap.c;h=397969eff0ce0ea7a4eb48762bdef9d0e019bbd6;hb=3b473acc5d4d27e5cf5101a4b8cc8a21c2bb7262;hp=8ddf1e340785f9d9c51d14c085ce5985b3cce0c0;hpb=1f57476bee2e0311d39f30fa50c3da4d74f654ba;p=collectd.git diff --git a/src/swap.c b/src/swap.c index 8ddf1e34..397969ef 100644 --- a/src/swap.c +++ b/src/swap.c @@ -1,8 +1,9 @@ /** * collectd - src/swap.c - * Copyright (C) 2005-2009 Florian octo Forster + * Copyright (C) 2005-2010 Florian octo Forster * Copyright (C) 2009 Stefan Völkel * Copyright (C) 2009 Manuel Sanmartin + * Copyright (C) 2010 Aurélien Reynaud * * 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 @@ -18,8 +19,9 @@ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * Authors: - * Florian octo Forster + * Florian octo Forster * Manuel Sanmartin + * Aurélien Reynaud **/ #if HAVE_CONFIG_H @@ -68,17 +70,14 @@ #define MAX(x,y) ((x) > (y) ? (x) : (y)) #if KERNEL_LINUX +# define SWAP_HAVE_CONFIG 1 /* No global variables */ /* #endif KERNEL_LINUX */ -#elif HAVE_LIBKSTAT -static derive_t pagesize; -static kstat_t *ksp; -/* #endif HAVE_LIBKSTAT */ - #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS +# define SWAP_HAVE_CONFIG 1 static derive_t pagesize; -/* #endif HAVE_SWAPCTL */ +/* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */ #elif defined(VM_SWAPUSAGE) /* No global variables */ @@ -102,19 +101,39 @@ static perfstat_memory_total_t pmemory; # error "No applicable input method." #endif /* HAVE_LIBSTATGRAB */ -static int swap_init (void) +#if SWAP_HAVE_CONFIG +static const char *config_keys[] = +{ + "ReportByDevice" +}; +static int config_keys_num = STATIC_ARRAY_SIZE (config_keys); + +static _Bool report_by_device = 0; + +static int swap_config (const char *key, const char *value) /* {{{ */ +{ + if (strcasecmp ("ReportByDevice", key) == 0) + { + if (IS_TRUE (value)) + report_by_device = 1; + else + report_by_device = 0; + } + else + { + return (-1); + } + + return (0); +} /* }}} int swap_config */ +#endif /* SWAP_HAVE_CONFIG */ + +static int swap_init (void) /* {{{ */ { #if KERNEL_LINUX /* No init stuff */ /* #endif KERNEL_LINUX */ -#elif HAVE_LIBKSTAT - /* getpagesize(3C) tells me this does not fail.. */ - pagesize = (derive_t) getpagesize (); - if (get_kstat (&ksp, "unix", 0, "system_pages")) - ksp = NULL; -/* #endif HAVE_LIBKSTAT */ - #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS /* getpagesize(3C) tells me this does not fail.. */ pagesize = (derive_t) getpagesize (); @@ -154,100 +173,188 @@ static int swap_init (void) #endif /* HAVE_PERFSTAT */ return (0); -} +} /* }}} int swap_init */ -static void swap_submit (const char *type_instance, derive_t value, unsigned type) +static void swap_submit (const char *plugin_instance, /* {{{ */ + const char *type, const char *type_instance, + value_t value) { - value_t values[1]; value_list_t vl = VALUE_LIST_INIT; - switch (type) - { - case DS_TYPE_GAUGE: - values[0].gauge = (gauge_t) value; - sstrncpy (vl.type, "swap", sizeof (vl.type)); - break; - case DS_TYPE_DERIVE: - values[0].derive = value; - sstrncpy (vl.type, "swap_io", sizeof (vl.type)); - break; - default: - ERROR ("swap plugin: swap_submit called with wrong" - " type"); - } + assert (type != NULL); - vl.values = values; + vl.values = &value; vl.values_len = 1; sstrncpy (vl.host, hostname_g, sizeof (vl.host)); sstrncpy (vl.plugin, "swap", sizeof (vl.plugin)); - sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance)); + if (plugin_instance != NULL) + sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance)); + sstrncpy (vl.type, type, sizeof (vl.type)); + if (type_instance != NULL) + sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance)); plugin_dispatch_values (&vl); -} /* void swap_submit */ +} /* }}} void swap_submit_inst */ -static int swap_read (void) +static void swap_submit_gauge (const char *plugin_instance, /* {{{ */ + const char *type_instance, gauge_t value) { -#if KERNEL_LINUX - FILE *fh; - char buffer[1024]; + value_t v; + + v.gauge = value; + swap_submit (plugin_instance, "swap", type_instance, v); +} /* }}} void swap_submit_gauge */ - char *fields[8]; - int numfields; +#if KERNEL_LINUX +static void swap_submit_derive (const char *plugin_instance, /* {{{ */ + const char *type_instance, derive_t value) +{ + value_t v; - _Bool old_kernel=0; + v.derive = value; + swap_submit (plugin_instance, "swap_io", type_instance, v); +} /* }}} void swap_submit_derive */ - derive_t swap_used = 0; - derive_t swap_cached = 0; - derive_t swap_free = 0; - derive_t swap_total = 0; - derive_t swap_in = 0; - derive_t swap_out = 0; +static int swap_read_separate (void) /* {{{ */ +{ + FILE *fh; + char buffer[1024]; - if ((fh = fopen ("/proc/meminfo", "r")) == NULL) + fh = fopen ("/proc/swaps", "r"); + if (fh == NULL) { char errbuf[1024]; - WARNING ("memory: fopen: %s", + WARNING ("swap plugin: fopen (/proc/swaps) failed: %s", sstrerror (errno, errbuf, sizeof (errbuf))); return (-1); } - while (fgets (buffer, 1024, fh) != NULL) + while (fgets (buffer, sizeof (buffer), fh) != NULL) { - derive_t *val = NULL; - - if (strncasecmp (buffer, "SwapTotal:", 10) == 0) - val = &swap_total; - else if (strncasecmp (buffer, "SwapFree:", 9) == 0) - val = &swap_free; - else if (strncasecmp (buffer, "SwapCached:", 11) == 0) - val = &swap_cached; - else + char *fields[8]; + int numfields; + char *endptr; + + char path[PATH_MAX]; + gauge_t size; + gauge_t used; + gauge_t free; + + numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields)); + if (numfields != 5) continue; - numfields = strsplit (buffer, fields, 8); + sstrncpy (path, fields[0], sizeof (path)); + escape_slashes (path, sizeof (path)); - if (numfields < 2) + errno = 0; + endptr = NULL; + size = strtod (fields[2], &endptr); + if ((endptr == fields[2]) || (errno != 0)) continue; - *val = (derive_t) atoll (fields[1]) * 1024LL; + errno = 0; + endptr = NULL; + used = strtod (fields[3], &endptr); + if ((endptr == fields[3]) || (errno != 0)) + continue; + + if (size < used) + continue; + + free = size - used; + + swap_submit_gauge (path, "used", used); + swap_submit_gauge (path, "free", free); } - if (fclose (fh)) + fclose (fh); + + return (0); +} /* }}} int swap_read_separate */ + +static int swap_read_combined (void) /* {{{ */ +{ + FILE *fh; + char buffer[1024]; + + uint8_t have_data = 0; + gauge_t swap_used = 0.0; + gauge_t swap_cached = 0.0; + gauge_t swap_free = 0.0; + gauge_t swap_total = 0.0; + + fh = fopen ("/proc/meminfo", "r"); + if (fh == NULL) { char errbuf[1024]; - WARNING ("memory: fclose: %s", + WARNING ("swap plugin: fopen (/proc/meminfo) failed: %s", sstrerror (errno, errbuf, sizeof (errbuf))); + return (-1); } - if ((swap_total == 0LL) || ((swap_free + swap_cached) > swap_total)) - return (-1); + while (fgets (buffer, sizeof (buffer), fh) != NULL) + { + char *fields[8]; + int numfields; + + numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields)); + if (numfields < 2) + continue; + + if (strcasecmp (fields[0], "SwapTotal:") == 0) + { + swap_total = strtod (fields[1], /* endptr = */ NULL); + have_data |= 0x01; + } + else if (strcasecmp (fields[0], "SwapFree:") == 0) + { + swap_free = strtod (fields[1], /* endptr = */ NULL); + have_data |= 0x02; + } + else if (strcasecmp (fields[0], "SwapCached:") == 0) + { + swap_cached = strtod (fields[1], /* endptr = */ NULL); + have_data |= 0x04; + } + } + + fclose (fh); + + if (have_data != 0x07) + return (ENOENT); + + if (isnan (swap_total) + || (swap_total <= 0.0) + || ((swap_free + swap_cached) > swap_total)) + return (EINVAL); swap_used = swap_total - (swap_free + swap_cached); - if ((fh = fopen ("/proc/vmstat", "r")) == NULL) + swap_submit_gauge (NULL, "used", 1024.0 * swap_used); + swap_submit_gauge (NULL, "free", 1024.0 * swap_free); + swap_submit_gauge (NULL, "cached", 1024.0 * swap_cached); + + return (0); +} /* }}} int swap_read_combined */ + +static int swap_read_io (void) /* {{{ */ +{ + FILE *fh; + char buffer[1024]; + + _Bool old_kernel = 0; + + uint8_t have_data = 0; + derive_t swap_in = 0; + derive_t swap_out = 0; + + fh = fopen ("/proc/vmstat", "r"); + if (fh == NULL) { - // /proc/vmstat does not exist in kernels <2.6 - if ((fh = fopen ("/proc/stat", "r")) == NULL ) + /* /proc/vmstat does not exist in kernels <2.6 */ + fh = fopen ("/proc/stat", "r"); + if (fh == NULL) { char errbuf[1024]; WARNING ("swap: fopen: %s", @@ -258,8 +365,11 @@ static int swap_read (void) old_kernel = 1; } - while (fgets (buffer, 1024, fh) != NULL) + while (fgets (buffer, sizeof (buffer), fh) != NULL) { + char *fields[8]; + int numfields; + numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields)); if (!old_kernel) @@ -267,10 +377,16 @@ static int swap_read (void) if (numfields != 2) continue; - if (strcasecmp ("pswpin", fields[0]) != 0) + if (strcasecmp ("pswpin", fields[0]) == 0) + { strtoderive (fields[1], &swap_in); + have_data |= 0x01; + } else if (strcasecmp ("pswpout", fields[0]) == 0) + { strtoderive (fields[1], &swap_out); + have_data |= 0x02; + } } else /* if (old_kernel) */ { @@ -285,21 +401,43 @@ static int swap_read (void) } } /* while (fgets) */ - if (fclose (fh)) - { - char errbuf[1024]; - WARNING ("swap: fclose: %s", - sstrerror (errno, errbuf, sizeof (errbuf))); - } + fclose (fh); + + if (have_data != 0x03) + return (ENOENT); - swap_submit ("used", swap_used, DS_TYPE_GAUGE); - swap_submit ("free", swap_free, DS_TYPE_GAUGE); - swap_submit ("cached", swap_cached, DS_TYPE_GAUGE); - swap_submit ("in", swap_in, DS_TYPE_DERIVE); - swap_submit ("out", swap_out, DS_TYPE_DERIVE); + swap_submit_derive (NULL, "in", swap_in); + swap_submit_derive (NULL, "out", swap_out); + + return (0); +} /* }}} int swap_read_io */ + +static int swap_read (void) /* {{{ */ +{ + if (report_by_device) + swap_read_separate (); + else + swap_read_combined (); + + swap_read_io (); + + return (0); +} /* }}} int swap_read */ /* #endif KERNEL_LINUX */ -#elif HAVE_LIBKSTAT +/* + * Under Solaris, two mechanisms can be used to read swap statistics, swapctl + * and kstat. The former reads physical space used on a device, the latter + * reports the view from the virtual memory system. It was decided that the + * kstat-based information should be moved to the "vmem" plugin, but nobody + * with enough Solaris experience was available at that time to do this. The + * code below is still there for your reference but it won't be activated in + * *this* plugin again. --octo + */ +#elif 0 && HAVE_LIBKSTAT +/* kstat-based read function */ +static int swap_read_kstat (void) /* {{{ */ +{ derive_t swap_alloc; derive_t swap_resv; derive_t swap_avail; @@ -340,15 +478,20 @@ static int swap_read (void) * pagesize); swap_avail = (derive_t) ((ai.ani_max - ai.ani_resv) * pagesize); - swap_submit ("used", swap_alloc, DS_TYPE_GAUGE); - swap_submit ("free", swap_avail, DS_TYPE_GAUGE); - swap_submit ("reserved", swap_resv, DS_TYPE_GAUGE); -/* #endif HAVE_LIBKSTAT */ + swap_submit_gauge (NULL, "used", swap_alloc); + swap_submit_gauge (NULL, "free", swap_avail); + swap_submit_gauge (NULL, "reserved", swap_resv); -#elif HAVE_SWAPCTL - #if HAVE_SWAPCTL_TWO_ARGS + return (0); +} /* }}} int swap_read_kstat */ +/* #endif 0 && HAVE_LIBKSTAT */ + +#elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS +/* swapctl-based read function */ +static int swap_read (void) /* {{{ */ +{ swaptbl_t *s; - char strtab[255]; + char *s_paths; int swap_num; int status; int i; @@ -366,53 +509,108 @@ static int swap_read (void) else if (swap_num == 0) return (0); + /* Allocate and initialize the swaptbl_t structure */ s = (swaptbl_t *) smalloc (swap_num * sizeof (swapent_t) + sizeof (struct swaptable)); if (s == NULL) { ERROR ("swap plugin: smalloc failed."); return (-1); } - /* Initialize string pointers. We have them share the same buffer as we don't care - * about the device's name, only its size. This saves memory and alloc/free ops */ - for (i = 0; i < (swap_num + 1); i++) { - s->swt_ent[i].ste_path = strtab; - } - s->swt_n = swap_num + 1; + + /* Memory to store the path names. We only use these paths when the + * separate option has been configured, but it's easier to just + * allocate enough memory in any case. */ + s_paths = calloc (swap_num, PATH_MAX); + if (s_paths == NULL) + { + ERROR ("swap plugin: malloc failed."); + sfree (s); + return (-1); + } + for (i = 0; i < swap_num; i++) + s->swt_ent[i].ste_path = s_paths + (i * PATH_MAX); + s->swt_n = swap_num; + status = swapctl (SC_LIST, s); - if (status != swap_num) + if (status < 0) { - ERROR ("swap plugin: swapctl (SC_LIST) failed with status %i.", - status); + char errbuf[1024]; + ERROR ("swap plugin: swapctl (SC_LIST) failed: %s", + sstrerror (errno, errbuf, sizeof (errbuf))); + sfree (s_paths); sfree (s); return (-1); } + else if (swap_num < status) + { + /* more elements returned than requested */ + ERROR ("swap plugin: I allocated memory for %i structure%s, " + "but swapctl(2) claims to have returned %i. " + "I'm confused and will give up.", + swap_num, (swap_num == 1) ? "" : "s", + status); + sfree (s_paths); + sfree (s); + return (-1); + } + else if (swap_num > status) + /* less elements returned than requested */ + swap_num = status; for (i = 0; i < swap_num; i++) { + char path[PATH_MAX]; + derive_t this_total; + derive_t this_avail; + if ((s->swt_ent[i].ste_flags & ST_INDEL) != 0) continue; - avail += ((derive_t) s->swt_ent[i].ste_free) - * pagesize; - total += ((derive_t) s->swt_ent[i].ste_pages) - * pagesize; - } + this_total = ((derive_t) s->swt_ent[i].ste_pages) * pagesize; + this_avail = ((derive_t) s->swt_ent[i].ste_free) * pagesize; + + /* Shortcut for the "combined" setting (default) */ + if (!report_by_device) + { + avail += this_avail; + total += this_total; + continue; + } + + sstrncpy (path, s->swt_ent[i].ste_path, sizeof (path)); + escape_slashes (path, sizeof (path)); + + swap_submit_gauge (path, "used", (gauge_t) (this_total - this_avail)); + swap_submit_gauge (path, "free", (gauge_t) this_avail); + } /* for (swap_num) */ if (total < avail) { - ERROR ("swap plugin: Total swap space (%"PRIu64") " - "is less than free swap space (%"PRIu64").", + ERROR ("swap plugin: Total swap space (%"PRIi64") " + "is less than free swap space (%"PRIi64").", total, avail); + sfree (s_paths); + sfree (s); return (-1); } - swap_submit ("used", total - avail, DS_TYPE_GAUGE); - swap_submit ("free", avail, DS_TYPE_GAUGE); + /* If the "separate" option was specified (report_by_device == 2), all + * values have already been dispatched from within the loop. */ + if (!report_by_device) + { + swap_submit_gauge (NULL, "used", (gauge_t) (total - avail)); + swap_submit_gauge (NULL, "free", (gauge_t) avail); + } + sfree (s_paths); sfree (s); - /* #endif HAVE_SWAPCTL_TWO_ARGS */ - #elif HAVE_SWAPCTL_THREE_ARGS + return (0); +} /* }}} int swap_read */ +/* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */ +#elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS +static int swap_read (void) /* {{{ */ +{ struct swapent *swap_entries; int swap_num; int status; @@ -472,14 +670,18 @@ static int swap_read (void) return (-1); } - swap_submit ("used", used, DS_TYPE_GAUGE); - swap_submit ("free", total - used, DS_TYPE_GAUGE); + swap_submit_gauge (NULL, "used", (gauge_t) used); + swap_submit_gauge (NULL, "free", (gauge_t) (total - used)); sfree (swap_entries); - #endif /* HAVE_SWAPCTL_THREE_ARGS */ -/* #endif HAVE_SWAPCTL */ + + return (0); +} /* }}} int swap_read */ +/* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */ #elif defined(VM_SWAPUSAGE) +static int swap_read (void) /* {{{ */ +{ int mib[3]; size_t mib_len; struct xsw_usage sw_usage; @@ -495,11 +697,16 @@ static int swap_read (void) return (-1); /* The returned values are bytes. */ - swap_submit ("used", (derive_t) sw_usage.xsu_used, DS_TYPE_GAUGE); - swap_submit ("free", (derive_t) sw_usage.xsu_avail, DS_TYPE_GAUGE); + swap_submit_gauge (NULL, "used", (gauge_t) sw_usage.xsu_used); + swap_submit_gauge (NULL, "free", (gauge_t) sw_usage.xsu_avail); + + return (0); +} /* }}} int swap_read */ /* #endif VM_SWAPUSAGE */ #elif HAVE_LIBKVM_GETSWAPINFO +static int swap_read (void) /* {{{ */ +{ struct kvm_swap data_s; int status; @@ -523,11 +730,16 @@ static int swap_read (void) free = total - used; - swap_submit ("used", used, DS_TYPE_GAUGE); - swap_submit ("free", free, DS_TYPE_GAUGE); + swap_submit_gauge (NULL, "used", (gauge_t) used); + swap_submit_gauge (NULL, "free", (gauge_t) free); + + return (0); +} /* }}} int swap_read */ /* #endif HAVE_LIBKVM_GETSWAPINFO */ #elif HAVE_LIBSTATGRAB +static int swap_read (void) /* {{{ */ +{ sg_swap_stats *swap; swap = sg_get_swap_stats (); @@ -535,11 +747,16 @@ static int swap_read (void) if (swap == NULL) return (-1); - swap_submit ("used", (derive_t) swap->used, DS_TYPE_GAUGE); - swap_submit ("free", (derive_t) swap->free, DS_TYPE_GAUGE); + swap_submit_gauge (NULL, "used", (gauge_t) swap->used); + swap_submit_gauge (NULL, "free", (gauge_t) swap->free); + + return (0); +} /* }}} int swap_read */ /* #endif HAVE_LIBSTATGRAB */ #elif HAVE_PERFSTAT +static int swap_read (void) /* {{{ */ +{ if(perfstat_memory_total(NULL, &pmemory, sizeof(perfstat_memory_total_t), 1) < 0) { char errbuf[1024]; @@ -547,15 +764,20 @@ static int swap_read (void) sstrerror (errno, errbuf, sizeof (errbuf))); return (-1); } - swap_submit ("used", (derive_t) (pmemory.pgsp_total - pmemory.pgsp_free) * pagesize, DS_TYPE_GAUGE); - swap_submit ("free", (derive_t) pmemory.pgsp_free * pagesize , DS_TYPE_GAUGE); -#endif /* HAVE_PERFSTAT */ + swap_submit_gauge (NULL, "used", (gauge_t) (pmemory.pgsp_total - pmemory.pgsp_free) * pagesize); + swap_submit_gauge (NULL, "free", (gauge_t) pmemory.pgsp_free * pagesize ); return (0); -} /* int swap_read */ +} /* }}} int swap_read */ +#endif /* HAVE_PERFSTAT */ void module_register (void) { +#if SWAP_HAVE_CONFIG + plugin_register_config ("swap", swap_config, config_keys, config_keys_num); +#endif plugin_register_init ("swap", swap_init); plugin_register_read ("swap", swap_read); } /* void module_register */ + +/* vim: set fdm=marker : */