diff options
Diffstat (limited to 'src/lib-old-stats')
| -rw-r--r-- | src/lib-old-stats/Makefile.am | 18 | ||||
| -rw-r--r-- | src/lib-old-stats/Makefile.in | 820 | ||||
| -rw-r--r-- | src/lib-old-stats/stats-connection.c | 119 | ||||
| -rw-r--r-- | src/lib-old-stats/stats-connection.h | 11 | ||||
| -rw-r--r-- | src/lib-old-stats/stats-parser.c | 178 | ||||
| -rw-r--r-- | src/lib-old-stats/stats-parser.h | 29 | ||||
| -rw-r--r-- | src/lib-old-stats/stats.c | 229 | ||||
| -rw-r--r-- | src/lib-old-stats/stats.h | 71 |
8 files changed, 1475 insertions, 0 deletions
diff --git a/src/lib-old-stats/Makefile.am b/src/lib-old-stats/Makefile.am new file mode 100644 index 0000000..f97cf62 --- /dev/null +++ b/src/lib-old-stats/Makefile.am @@ -0,0 +1,18 @@ +noinst_LTLIBRARIES = libold_stats.la + +AM_CPPFLAGS = \ + -I$(top_srcdir)/src/lib \ + -I$(top_srcdir)/src/lib-master + +libold_stats_la_SOURCES = \ + stats.c \ + stats-connection.c \ + stats-parser.c + +headers = \ + stats.h \ + stats-connection.h \ + stats-parser.h + +pkginc_libdir = $(pkgincludedir) +pkginc_lib_HEADERS = $(headers) diff --git a/src/lib-old-stats/Makefile.in b/src/lib-old-stats/Makefile.in new file mode 100644 index 0000000..3f949bc --- /dev/null +++ b/src/lib-old-stats/Makefile.in @@ -0,0 +1,820 @@ +# Makefile.in generated by automake 1.16.3 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2020 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; 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install-exec install-exec-am install-html install-html-am \ + install-info install-info-am install-man install-pdf \ + install-pdf-am install-pkginc_libHEADERS install-ps \ + install-ps-am install-strip installcheck installcheck-am \ + installdirs maintainer-clean maintainer-clean-generic \ + mostlyclean mostlyclean-compile mostlyclean-generic \ + mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \ + uninstall-am uninstall-pkginc_libHEADERS + +.PRECIOUS: Makefile + + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/src/lib-old-stats/stats-connection.c b/src/lib-old-stats/stats-connection.c new file mode 100644 index 0000000..24b5e73 --- /dev/null +++ b/src/lib-old-stats/stats-connection.c @@ -0,0 +1,119 @@ +/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */ + +#include "lib.h" +#include "ioloop.h" +#include "str.h" +#include "master-service.h" +#include "stats-connection.h" + +#include <unistd.h> +#include <fcntl.h> + +#define STATS_EAGAIN_WARN_INTERVAL_SECS 30 + +struct stats_connection { + int refcount; + + int fd; + char *path; + + bool open_failed; + time_t next_warning_timestamp; +}; + +static bool stats_connection_open(struct stats_connection *conn) +{ + if (conn->open_failed) + return FALSE; + + conn->fd = open(conn->path, O_WRONLY | O_NONBLOCK); + if (conn->fd == -1) { + i_error("stats: open(%s) failed: %m", conn->path); + conn->open_failed = TRUE; + return FALSE; + } + return TRUE; +} + +struct stats_connection * +stats_connection_create(const char *path) +{ + struct stats_connection *conn; + + conn = i_new(struct stats_connection, 1); + conn->refcount = 1; + conn->path = i_strdup(path); + (void)stats_connection_open(conn); + return conn; +} + +void stats_connection_ref(struct stats_connection *conn) +{ + conn->refcount++; +} + +void stats_connection_unref(struct stats_connection **_conn) +{ + struct stats_connection *conn = *_conn; + + i_assert(conn->refcount > 0); + if (--conn->refcount > 0) + return; + + *_conn = NULL; + i_close_fd_path(&conn->fd, conn->path); + i_free(conn->path); + i_free(conn); +} + +int stats_connection_send(struct stats_connection *conn, const string_t *str) +{ + static bool pipe_warned = FALSE; + ssize_t ret; + + /* if master process has been stopped (and restarted), don't even try + to notify the stats process anymore. even if one exists, it doesn't + know about us. */ + if (master_service_is_master_stopped(master_service)) + return -1; + + if (conn->fd == -1) { + if (!stats_connection_open(conn)) + return -1; + i_assert(conn->fd != -1); + } + + if (str_len(str) > PIPE_BUF && !pipe_warned) { + i_warning("stats update sent more bytes that PIPE_BUF " + "(%zu > %u), this may break statistics", + str_len(str), (unsigned int)PIPE_BUF); + pipe_warned = TRUE; + } + + ret = write(conn->fd, str_data(str), str_len(str)); + if (ret == (ssize_t)str_len(str)) { + /* success */ + return 0; + } else if (ret < 0 && errno == EAGAIN) { + /* stats process is busy */ + if (ioloop_time > conn->next_warning_timestamp) { + i_warning("write(%s) failed: %m (stats process is busy)", conn->path); + conn->next_warning_timestamp = ioloop_time + + STATS_EAGAIN_WARN_INTERVAL_SECS; + } + return -1; + } else { + /* error - reconnect */ + if (ret < 0) { + /* don't log EPIPE errors. they can happen when + Dovecot is stopped. */ + if (errno != EPIPE) + i_error("write(%s) failed: %m", conn->path); + } else if ((size_t)ret != str_len(str)) + i_error("write(%s) wrote partial update", conn->path); + if (close(conn->fd) < 0) + i_error("close(%s) failed: %m", conn->path); + conn->fd = -1; + return -1; + } +} diff --git a/src/lib-old-stats/stats-connection.h b/src/lib-old-stats/stats-connection.h new file mode 100644 index 0000000..2295e09 --- /dev/null +++ b/src/lib-old-stats/stats-connection.h @@ -0,0 +1,11 @@ +#ifndef STATS_CONNECTION_H +#define STATS_CONNECTION_H + +struct stats_connection *stats_connection_create(const char *path); +void stats_connection_ref(struct stats_connection *conn); +void stats_connection_unref(struct stats_connection **conn); + +/* Returns 0 on success, -1 on failure. */ +int stats_connection_send(struct stats_connection *conn, const string_t *str); + +#endif diff --git a/src/lib-old-stats/stats-parser.c b/src/lib-old-stats/stats-parser.c new file mode 100644 index 0000000..da009e9 --- /dev/null +++ b/src/lib-old-stats/stats-parser.c @@ -0,0 +1,178 @@ +/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */ + +#include "lib.h" +#include "str.h" +#include "time-util.h" +#include "stats-parser.h" + +#define USECS_PER_SEC 1000000 + +static bool stats_diff_timeval(struct timeval *dest, + const struct timeval *src1, + const struct timeval *src2) +{ + long long diff_usecs; + + diff_usecs = timeval_diff_usecs(src2, src1); + if (diff_usecs < 0) + return FALSE; + dest->tv_sec = diff_usecs / USECS_PER_SEC; + dest->tv_usec = diff_usecs % USECS_PER_SEC; + return TRUE; +} + +static bool +stats_diff_uint32(uint32_t *dest, const uint32_t *src1, const uint32_t *src2) +{ + if (*src1 > *src2) + return FALSE; + *dest = *src2 - *src1; + return TRUE; +} + +static bool +stats_diff_uint64(uint64_t *dest, const uint64_t *src1, const uint64_t *src2) +{ + if (*src1 > *src2) + return FALSE; + *dest = *src2 - *src1; + return TRUE; +} + +bool stats_parser_diff(const struct stats_parser_field *fields, + unsigned int fields_count, + const struct stats *stats1, const struct stats *stats2, + struct stats *diff_stats_r, const char **error_r) +{ + unsigned int i; + + for (i = 0; i < fields_count; i++) { + unsigned int offset = fields[i].offset; + void *dest = PTR_OFFSET(diff_stats_r, offset); + const void *src1 = CONST_PTR_OFFSET(stats1, offset); + const void *src2 = CONST_PTR_OFFSET(stats2, offset); + + switch (fields[i].type) { + case STATS_PARSER_TYPE_UINT: + switch (fields[i].size) { + case sizeof(uint32_t): + if (!stats_diff_uint32(dest, src1, src2)) { + *error_r = t_strdup_printf("%s %u < %u", + fields[i].name, + *(const uint32_t *)src2, + *(const uint32_t *)src1); + return FALSE; + } + break; + case sizeof(uint64_t): + if (!stats_diff_uint64(dest, src1, src2)) { + const uint64_t *n1 = src1, *n2 = src2; + + *error_r = t_strdup_printf("%s %"PRIu64" < %"PRIu64, + fields[i].name, *n2, *n1); + return FALSE; + } + break; + default: + i_unreached(); + } + break; + case STATS_PARSER_TYPE_TIMEVAL: + if (!stats_diff_timeval(dest, src1, src2)) { + const struct timeval *tv1 = src1, *tv2 = src2; + + *error_r = t_strdup_printf("%s %ld.%d < %ld.%d", + fields[i].name, + (long)tv2->tv_sec, (int)tv2->tv_usec, + (long)tv1->tv_sec, (int)tv1->tv_usec); + return FALSE; + } + break; + } + } + return TRUE; +} + +static void stats_timeval_add(struct timeval *dest, const struct timeval *src) +{ + dest->tv_sec += src->tv_sec; + dest->tv_usec += src->tv_usec; + if (dest->tv_usec > USECS_PER_SEC) { + dest->tv_usec -= USECS_PER_SEC; + dest->tv_sec++; + } +} + +void stats_parser_add(const struct stats_parser_field *fields, + unsigned int fields_count, + struct stats *dest, const struct stats *src) +{ + unsigned int i; + + for (i = 0; i < fields_count; i++) { + unsigned int offset = fields[i].offset; + void *f_dest = PTR_OFFSET(dest, offset); + const void *f_src = CONST_PTR_OFFSET(src, offset); + + switch (fields[i].type) { + case STATS_PARSER_TYPE_UINT: + switch (fields[i].size) { + case sizeof(uint32_t): { + uint32_t *n_dest = f_dest; + const uint32_t *n_src = f_src; + + *n_dest += *n_src; + break; + } + case sizeof(uint64_t): { + uint64_t *n_dest = f_dest; + const uint64_t *n_src = f_src; + + *n_dest += *n_src; + break; + } + default: + i_unreached(); + } + break; + case STATS_PARSER_TYPE_TIMEVAL: + stats_timeval_add(f_dest, f_src); + break; + } + } +} + +void stats_parser_value(string_t *str, + const struct stats_parser_field *field, + const void *data) +{ + const void *ptr = CONST_PTR_OFFSET(data, field->offset); + + switch (field->type) { + case STATS_PARSER_TYPE_UINT: + switch (field->size) { + case sizeof(uint32_t): { + const uint32_t *n = ptr; + + str_printfa(str, "%u", *n); + break; + } + case sizeof(uint64_t): { + const uint64_t *n = ptr; + + str_printfa(str, "%"PRIu64, *n); + break; + } + default: + i_unreached(); + } + break; + case STATS_PARSER_TYPE_TIMEVAL: { + const struct timeval *tv = ptr; + + str_printfa(str, "%"PRIdTIME_T".%u", + tv->tv_sec, (unsigned int)tv->tv_usec); + break; + } + } +} diff --git a/src/lib-old-stats/stats-parser.h b/src/lib-old-stats/stats-parser.h new file mode 100644 index 0000000..ad701bf --- /dev/null +++ b/src/lib-old-stats/stats-parser.h @@ -0,0 +1,29 @@ +#ifndef STATS_PARSER_H +#define STATS_PARSER_H + +struct stats; + +enum stats_parser_type { + STATS_PARSER_TYPE_UINT, + STATS_PARSER_TYPE_TIMEVAL +}; + +struct stats_parser_field { + const char *name; + unsigned int offset; + unsigned int size; + enum stats_parser_type type; +}; + +bool stats_parser_diff(const struct stats_parser_field *fields, + unsigned int fields_count, + const struct stats *stats1, const struct stats *stats2, + struct stats *diff_stats_r, const char **error_r); +void stats_parser_add(const struct stats_parser_field *fields, + unsigned int fields_count, + struct stats *dest, const struct stats *src); +void stats_parser_value(string_t *str, + const struct stats_parser_field *field, + const void *data); + +#endif diff --git a/src/lib-old-stats/stats.c b/src/lib-old-stats/stats.c new file mode 100644 index 0000000..284de26 --- /dev/null +++ b/src/lib-old-stats/stats.c @@ -0,0 +1,229 @@ +/* Copyright (c) 2015-2018 Dovecot authors, see the included COPYING file */ + +#include "lib.h" +#include "array.h" +#include "stats.h" + +struct stats_item { + struct stats_vfuncs v; + size_t pos; +}; + +static ARRAY(struct stats_item *) stats_items = ARRAY_INIT; +static unsigned int stats_total_size = 0; +static bool stats_allocated = FALSE; + +struct stats_item *stats_register(const struct stats_vfuncs *vfuncs) +{ + struct stats_item *item; + + if (stats_allocated) + i_panic("stats_register() called after stats_alloc_size() was already called - this will break existing allocations"); + + if (!array_is_created(&stats_items)) + i_array_init(&stats_items, 8); + + item = i_new(struct stats_item, 1); + item->v = *vfuncs; + item->pos = stats_total_size; + array_push_back(&stats_items, &item); + + stats_total_size += vfuncs->alloc_size(); + return item; +} + +static bool stats_item_find(struct stats_item *item, unsigned int *idx_r) +{ + struct stats_item *const *itemp; + + array_foreach(&stats_items, itemp) { + if (*itemp == item) { + *idx_r = array_foreach_idx(&stats_items, itemp); + return TRUE; + } + } + return FALSE; +} + +static struct stats_item *stats_item_find_by_name(const char *name) +{ + struct stats_item *item; + + array_foreach_elem(&stats_items, item) { + if (strcmp(item->v.short_name, name) == 0) + return item; + } + return NULL; +} + +void stats_unregister(struct stats_item **_item) +{ + struct stats_item *item = *_item; + unsigned int idx; + + *_item = NULL; + + if (!stats_item_find(item, &idx)) + i_unreached(); + array_delete(&stats_items, idx, 1); + + i_free(item); + if (array_count(&stats_items) == 0) { + array_free(&stats_items); + /* all stats should have been freed by now. allow + re-registering and using stats. */ + stats_allocated = FALSE; + } +} + +struct stats *stats_alloc(pool_t pool) +{ + return p_malloc(pool, stats_alloc_size()); +} + +size_t stats_alloc_size(void) +{ + stats_allocated = TRUE; + return stats_total_size; +} + +void stats_copy(struct stats *dest, const struct stats *src) +{ + memcpy(dest, src, stats_total_size); +} + +unsigned int stats_field_count(void) +{ + struct stats_item *item; + unsigned int count = 0; + + array_foreach_elem(&stats_items, item) + count += item->v.field_count(); + return count; +} + +const char *stats_field_name(unsigned int n) +{ + struct stats_item *item; + unsigned int i = 0, count; + + array_foreach_elem(&stats_items, item) { + count = item->v.field_count(); + if (i + count > n) + return item->v.field_name(n - i); + i += count; + } + i_unreached(); +} + +void stats_field_value(string_t *str, const struct stats *stats, + unsigned int n) +{ + struct stats_item *item; + unsigned int i = 0, count; + + array_foreach_elem(&stats_items, item) { + count = item->v.field_count(); + if (i + count > n) { + const void *item_stats = + CONST_PTR_OFFSET(stats, item->pos); + item->v.field_value(str, item_stats, n - i); + return; + } + i += count; + } + i_unreached(); +} + +bool stats_diff(const struct stats *stats1, const struct stats *stats2, + struct stats *diff_stats_r, const char **error_r) +{ + struct stats_item *item; + bool ret = TRUE; + + array_foreach_elem(&stats_items, item) { + if (!item->v.diff(CONST_PTR_OFFSET(stats1, item->pos), + CONST_PTR_OFFSET(stats2, item->pos), + PTR_OFFSET(diff_stats_r, item->pos), + error_r)) + ret = FALSE; + } + return ret; +} + +void stats_add(struct stats *dest, const struct stats *src) +{ + struct stats_item *item; + + array_foreach_elem(&stats_items, item) { + item->v.add(PTR_OFFSET(dest, item->pos), + CONST_PTR_OFFSET(src, item->pos)); + } +} + +bool stats_have_changed(const struct stats *prev, const struct stats *cur) +{ + struct stats_item *item; + + array_foreach_elem(&stats_items, item) { + if (item->v.have_changed(CONST_PTR_OFFSET(prev, item->pos), + CONST_PTR_OFFSET(cur, item->pos))) + return TRUE; + } + return FALSE; +} + +void stats_export(buffer_t *buf, const struct stats *stats) +{ + struct stats_item *item; + + array_foreach_elem(&stats_items, item) { + buffer_append(buf, item->v.short_name, + strlen(item->v.short_name)+1); + item->v.export(buf, CONST_PTR_OFFSET(stats, item->pos)); + } +} + +bool stats_import(const unsigned char *data, size_t size, + const struct stats *old_stats, struct stats *stats, + const char **error_r) +{ + struct stats_item *item; + const unsigned char *p; + size_t pos; + + memcpy(stats, old_stats, stats_total_size); + while (size > 0) { + const char *next_name = (const void *)data; + + p = memchr(data, '\0', size); + if (p == NULL) { + *error_r = "Expected name, but NUL is missing"; + return FALSE; + } + item = stats_item_find_by_name(next_name); + if (item == NULL) { + *error_r = t_strdup_printf("Unknown stats name: '%s'", next_name); + return FALSE; + } + size -= (p+1) - data; + data = p+1; + if (!item->v.import(data, size, &pos, + PTR_OFFSET(stats, item->pos), error_r)) + return FALSE; + i_assert(pos <= size); + data += pos; + size -= pos; + } + return TRUE; +} + +void *stats_fill_ptr(struct stats *stats, struct stats_item *item) +{ + return PTR_OFFSET(stats, item->pos); +} + +void stats_reset(struct stats *stats) +{ + memset(stats, 0, stats_total_size); +} diff --git a/src/lib-old-stats/stats.h b/src/lib-old-stats/stats.h new file mode 100644 index 0000000..0cd0dc3 --- /dev/null +++ b/src/lib-old-stats/stats.h @@ -0,0 +1,71 @@ +#ifndef STATS_H +#define STATS_H + +struct stats; +struct stats_item; + +struct stats_vfuncs { + const char *short_name; + + size_t (*alloc_size)(void); + unsigned int (*field_count)(void); + const char *(*field_name)(unsigned int n); + void (*field_value)(string_t *str, const struct stats *stats, + unsigned int n); + + bool (*diff)(const struct stats *stats1, const struct stats *stats2, + struct stats *diff_stats_r, const char **error_r); + void (*add)(struct stats *dest, const struct stats *src); + bool (*have_changed)(const struct stats *prev, const struct stats *cur); + + void (*export)(buffer_t *buf, const struct stats *stats); + bool (*import)(const unsigned char *data, size_t size, size_t *pos_r, + struct stats *stats, const char **error_r); +}; + +struct stats_item *stats_register(const struct stats_vfuncs *vfuncs); +void stats_unregister(struct stats_item **item); + +/* Allocate struct stats from a given pool. */ +struct stats *stats_alloc(pool_t pool); +/* Returns the number of bytes allocated to stats. */ +size_t stats_alloc_size(void); +/* Copy all stats from src to dest. */ +void stats_copy(struct stats *dest, const struct stats *src); + +/* Returns the number of stats fields. */ +unsigned int stats_field_count(void); +/* Returns the name of a stats field (exported to doveadm). */ +const char *stats_field_name(unsigned int n); +/* Returns the value of a stats field as a string (exported to doveadm). */ +void stats_field_value(string_t *str, const struct stats *stats, + unsigned int n); + +/* Return diff_stats_r->field = stats2->field - stats1->field. + diff1 is supposed to have smaller values than diff2. Returns TRUE if this + is so, FALSE if not */ +bool stats_diff(const struct stats *stats1, const struct stats *stats2, + struct stats *diff_stats_r, const char **error_r); +/* dest->field += src->field */ +void stats_add(struct stats *dest, const struct stats *src); +/* Returns TRUE if any fields have changed in cur since prev in a way that + a plugin should send the updated statistics to the stats process. Not all + fields necessarily require sending an update. */ +bool stats_have_changed(const struct stats *prev, const struct stats *cur); + +/* Export stats into a buffer in binary format. */ +void stats_export(buffer_t *buf, const struct stats *stats); +/* Import stats from a buffer. The buffer doesn't need to contain an update to + all the stats items - old_stats are used for that item in such case. + Currently it's not allowed to have unknown items in the buffer. */ +bool stats_import(const unsigned char *data, size_t size, + const struct stats *old_stats, struct stats *stats, + const char **error_r); +/* Return a pointer to stats where the specified item starts. The returned + pointer can be used to fill up the item-specific stats (up to its + alloc_size() number of bytes). */ +void *stats_fill_ptr(struct stats *stats, struct stats_item *item); + +void stats_reset(struct stats *stats); + +#endif |