forked from Hakase/nginx-build
Initial commit
This commit is contained in:
Hakase
@@ -0,0 +1,1253 @@
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/*
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* Copyright (C) Igor Sysoev
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* Copyright (C) Nginx, Inc.
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_event.h>
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/*
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* open file cache caches
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* open file handles with stat() info;
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* directories stat() info;
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* files and directories errors: not found, access denied, etc.
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*/
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#define NGX_MIN_READ_AHEAD (128 * 1024)
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static void ngx_open_file_cache_cleanup(void *data);
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#if (NGX_HAVE_OPENAT)
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static ngx_fd_t ngx_openat_file_owner(ngx_fd_t at_fd, const u_char *name,
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ngx_int_t mode, ngx_int_t create, ngx_int_t access, ngx_log_t *log);
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#if (NGX_HAVE_O_PATH)
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static ngx_int_t ngx_file_o_path_info(ngx_fd_t fd, ngx_file_info_t *fi,
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ngx_log_t *log);
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#endif
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#endif
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static ngx_fd_t ngx_open_file_wrapper(ngx_str_t *name,
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ngx_open_file_info_t *of, ngx_int_t mode, ngx_int_t create,
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ngx_int_t access, ngx_log_t *log);
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static ngx_int_t ngx_file_info_wrapper(ngx_str_t *name,
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ngx_open_file_info_t *of, ngx_file_info_t *fi, ngx_log_t *log);
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static ngx_int_t ngx_open_and_stat_file(ngx_str_t *name,
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ngx_open_file_info_t *of, ngx_log_t *log);
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static void ngx_open_file_add_event(ngx_open_file_cache_t *cache,
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ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log);
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static void ngx_open_file_cleanup(void *data);
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static void ngx_close_cached_file(ngx_open_file_cache_t *cache,
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ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log);
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static void ngx_open_file_del_event(ngx_cached_open_file_t *file);
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static void ngx_expire_old_cached_files(ngx_open_file_cache_t *cache,
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ngx_uint_t n, ngx_log_t *log);
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static void ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp,
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ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
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static ngx_cached_open_file_t *
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ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name,
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uint32_t hash);
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static void ngx_open_file_cache_remove(ngx_event_t *ev);
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ngx_open_file_cache_t *
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ngx_open_file_cache_init(ngx_pool_t *pool, ngx_uint_t max, time_t inactive)
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{
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ngx_pool_cleanup_t *cln;
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ngx_open_file_cache_t *cache;
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cache = ngx_palloc(pool, sizeof(ngx_open_file_cache_t));
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if (cache == NULL) {
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return NULL;
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}
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ngx_rbtree_init(&cache->rbtree, &cache->sentinel,
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ngx_open_file_cache_rbtree_insert_value);
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ngx_queue_init(&cache->expire_queue);
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cache->current = 0;
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cache->max = max;
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cache->inactive = inactive;
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cln = ngx_pool_cleanup_add(pool, 0);
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if (cln == NULL) {
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return NULL;
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}
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cln->handler = ngx_open_file_cache_cleanup;
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cln->data = cache;
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return cache;
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}
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static void
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ngx_open_file_cache_cleanup(void *data)
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{
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ngx_open_file_cache_t *cache = data;
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ngx_queue_t *q;
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ngx_cached_open_file_t *file;
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ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
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"open file cache cleanup");
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for ( ;; ) {
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if (ngx_queue_empty(&cache->expire_queue)) {
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break;
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}
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q = ngx_queue_last(&cache->expire_queue);
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file = ngx_queue_data(q, ngx_cached_open_file_t, queue);
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ngx_queue_remove(q);
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ngx_rbtree_delete(&cache->rbtree, &file->node);
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cache->current--;
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ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
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"delete cached open file: %s", file->name);
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if (!file->err && !file->is_dir) {
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file->close = 1;
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file->count = 0;
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ngx_close_cached_file(cache, file, 0, ngx_cycle->log);
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} else {
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ngx_free(file->name);
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ngx_free(file);
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}
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}
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if (cache->current) {
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ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
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"%ui items still left in open file cache",
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cache->current);
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}
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if (cache->rbtree.root != cache->rbtree.sentinel) {
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ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
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"rbtree still is not empty in open file cache");
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}
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}
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ngx_int_t
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ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name,
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ngx_open_file_info_t *of, ngx_pool_t *pool)
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{
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time_t now;
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uint32_t hash;
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ngx_int_t rc;
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ngx_file_info_t fi;
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ngx_pool_cleanup_t *cln;
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ngx_cached_open_file_t *file;
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ngx_pool_cleanup_file_t *clnf;
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ngx_open_file_cache_cleanup_t *ofcln;
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of->fd = NGX_INVALID_FILE;
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of->err = 0;
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if (cache == NULL) {
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if (of->test_only) {
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if (ngx_file_info_wrapper(name, of, &fi, pool->log)
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== NGX_FILE_ERROR)
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{
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return NGX_ERROR;
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}
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of->uniq = ngx_file_uniq(&fi);
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of->mtime = ngx_file_mtime(&fi);
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of->size = ngx_file_size(&fi);
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of->fs_size = ngx_file_fs_size(&fi);
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of->is_dir = ngx_is_dir(&fi);
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of->is_file = ngx_is_file(&fi);
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of->is_link = ngx_is_link(&fi);
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of->is_exec = ngx_is_exec(&fi);
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return NGX_OK;
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}
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cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t));
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if (cln == NULL) {
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return NGX_ERROR;
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}
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rc = ngx_open_and_stat_file(name, of, pool->log);
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if (rc == NGX_OK && !of->is_dir) {
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cln->handler = ngx_pool_cleanup_file;
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clnf = cln->data;
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clnf->fd = of->fd;
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clnf->name = name->data;
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clnf->log = pool->log;
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}
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return rc;
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}
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cln = ngx_pool_cleanup_add(pool, sizeof(ngx_open_file_cache_cleanup_t));
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if (cln == NULL) {
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return NGX_ERROR;
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}
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now = ngx_time();
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hash = ngx_crc32_long(name->data, name->len);
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file = ngx_open_file_lookup(cache, name, hash);
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if (file) {
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file->uses++;
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ngx_queue_remove(&file->queue);
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if (file->fd == NGX_INVALID_FILE && file->err == 0 && !file->is_dir) {
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/* file was not used often enough to keep open */
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rc = ngx_open_and_stat_file(name, of, pool->log);
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if (rc != NGX_OK && (of->err == 0 || !of->errors)) {
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goto failed;
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}
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goto add_event;
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}
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if (file->use_event
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|| (file->event == NULL
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&& (of->uniq == 0 || of->uniq == file->uniq)
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&& now - file->created < of->valid
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#if (NGX_HAVE_OPENAT)
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&& of->disable_symlinks == file->disable_symlinks
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&& of->disable_symlinks_from == file->disable_symlinks_from
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#endif
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))
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{
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if (file->err == 0) {
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of->fd = file->fd;
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of->uniq = file->uniq;
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of->mtime = file->mtime;
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of->size = file->size;
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of->is_dir = file->is_dir;
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of->is_file = file->is_file;
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of->is_link = file->is_link;
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of->is_exec = file->is_exec;
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of->is_directio = file->is_directio;
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if (!file->is_dir) {
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file->count++;
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ngx_open_file_add_event(cache, file, of, pool->log);
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}
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} else {
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of->err = file->err;
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#if (NGX_HAVE_OPENAT)
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of->failed = file->disable_symlinks ? ngx_openat_file_n
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: ngx_open_file_n;
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#else
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of->failed = ngx_open_file_n;
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#endif
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}
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goto found;
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}
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ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0,
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"retest open file: %s, fd:%d, c:%d, e:%d",
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file->name, file->fd, file->count, file->err);
|
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|
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if (file->is_dir) {
|
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|
||||
/*
|
||||
* chances that directory became file are very small
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* so test_dir flag allows to use a single syscall
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* in ngx_file_info() instead of three syscalls
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*/
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of->test_dir = 1;
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}
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|
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of->fd = file->fd;
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of->uniq = file->uniq;
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|
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rc = ngx_open_and_stat_file(name, of, pool->log);
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if (rc != NGX_OK && (of->err == 0 || !of->errors)) {
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goto failed;
|
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}
|
||||
|
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if (of->is_dir) {
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|
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if (file->is_dir || file->err) {
|
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goto update;
|
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}
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|
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/* file became directory */
|
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|
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} else if (of->err == 0) { /* file */
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|
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if (file->is_dir || file->err) {
|
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goto add_event;
|
||||
}
|
||||
|
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if (of->uniq == file->uniq) {
|
||||
|
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if (file->event) {
|
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file->use_event = 1;
|
||||
}
|
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|
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of->is_directio = file->is_directio;
|
||||
|
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goto update;
|
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}
|
||||
|
||||
/* file was changed */
|
||||
|
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} else { /* error to cache */
|
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|
||||
if (file->err || file->is_dir) {
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goto update;
|
||||
}
|
||||
|
||||
/* file was removed, etc. */
|
||||
}
|
||||
|
||||
if (file->count == 0) {
|
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|
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ngx_open_file_del_event(file);
|
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|
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if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
|
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ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno,
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ngx_close_file_n " \"%V\" failed", name);
|
||||
}
|
||||
|
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goto add_event;
|
||||
}
|
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|
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ngx_rbtree_delete(&cache->rbtree, &file->node);
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|
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cache->current--;
|
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|
||||
file->close = 1;
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||||
|
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goto create;
|
||||
}
|
||||
|
||||
/* not found */
|
||||
|
||||
rc = ngx_open_and_stat_file(name, of, pool->log);
|
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|
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if (rc != NGX_OK && (of->err == 0 || !of->errors)) {
|
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goto failed;
|
||||
}
|
||||
|
||||
create:
|
||||
|
||||
if (cache->current >= cache->max) {
|
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ngx_expire_old_cached_files(cache, 0, pool->log);
|
||||
}
|
||||
|
||||
file = ngx_alloc(sizeof(ngx_cached_open_file_t), pool->log);
|
||||
|
||||
if (file == NULL) {
|
||||
goto failed;
|
||||
}
|
||||
|
||||
file->name = ngx_alloc(name->len + 1, pool->log);
|
||||
|
||||
if (file->name == NULL) {
|
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ngx_free(file);
|
||||
file = NULL;
|
||||
goto failed;
|
||||
}
|
||||
|
||||
ngx_cpystrn(file->name, name->data, name->len + 1);
|
||||
|
||||
file->node.key = hash;
|
||||
|
||||
ngx_rbtree_insert(&cache->rbtree, &file->node);
|
||||
|
||||
cache->current++;
|
||||
|
||||
file->uses = 1;
|
||||
file->count = 0;
|
||||
file->use_event = 0;
|
||||
file->event = NULL;
|
||||
|
||||
add_event:
|
||||
|
||||
ngx_open_file_add_event(cache, file, of, pool->log);
|
||||
|
||||
update:
|
||||
|
||||
file->fd = of->fd;
|
||||
file->err = of->err;
|
||||
#if (NGX_HAVE_OPENAT)
|
||||
file->disable_symlinks = of->disable_symlinks;
|
||||
file->disable_symlinks_from = of->disable_symlinks_from;
|
||||
#endif
|
||||
|
||||
if (of->err == 0) {
|
||||
file->uniq = of->uniq;
|
||||
file->mtime = of->mtime;
|
||||
file->size = of->size;
|
||||
|
||||
file->close = 0;
|
||||
|
||||
file->is_dir = of->is_dir;
|
||||
file->is_file = of->is_file;
|
||||
file->is_link = of->is_link;
|
||||
file->is_exec = of->is_exec;
|
||||
file->is_directio = of->is_directio;
|
||||
|
||||
if (!of->is_dir) {
|
||||
file->count++;
|
||||
}
|
||||
}
|
||||
|
||||
file->created = now;
|
||||
|
||||
found:
|
||||
|
||||
file->accessed = now;
|
||||
|
||||
ngx_queue_insert_head(&cache->expire_queue, &file->queue);
|
||||
|
||||
ngx_log_debug5(NGX_LOG_DEBUG_CORE, pool->log, 0,
|
||||
"cached open file: %s, fd:%d, c:%d, e:%d, u:%d",
|
||||
file->name, file->fd, file->count, file->err, file->uses);
|
||||
|
||||
if (of->err == 0) {
|
||||
|
||||
if (!of->is_dir) {
|
||||
cln->handler = ngx_open_file_cleanup;
|
||||
ofcln = cln->data;
|
||||
|
||||
ofcln->cache = cache;
|
||||
ofcln->file = file;
|
||||
ofcln->min_uses = of->min_uses;
|
||||
ofcln->log = pool->log;
|
||||
}
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
return NGX_ERROR;
|
||||
|
||||
failed:
|
||||
|
||||
if (file) {
|
||||
ngx_rbtree_delete(&cache->rbtree, &file->node);
|
||||
|
||||
cache->current--;
|
||||
|
||||
if (file->count == 0) {
|
||||
|
||||
if (file->fd != NGX_INVALID_FILE) {
|
||||
if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno,
|
||||
ngx_close_file_n " \"%s\" failed",
|
||||
file->name);
|
||||
}
|
||||
}
|
||||
|
||||
ngx_free(file->name);
|
||||
ngx_free(file);
|
||||
|
||||
} else {
|
||||
file->close = 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (of->fd != NGX_INVALID_FILE) {
|
||||
if (ngx_close_file(of->fd) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno,
|
||||
ngx_close_file_n " \"%V\" failed", name);
|
||||
}
|
||||
}
|
||||
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
|
||||
#if (NGX_HAVE_OPENAT)
|
||||
|
||||
static ngx_fd_t
|
||||
ngx_openat_file_owner(ngx_fd_t at_fd, const u_char *name,
|
||||
ngx_int_t mode, ngx_int_t create, ngx_int_t access, ngx_log_t *log)
|
||||
{
|
||||
ngx_fd_t fd;
|
||||
ngx_err_t err;
|
||||
ngx_file_info_t fi, atfi;
|
||||
|
||||
/*
|
||||
* To allow symlinks with the same owner, use openat() (followed
|
||||
* by fstat()) and fstatat(AT_SYMLINK_NOFOLLOW), and then compare
|
||||
* uids between fstat() and fstatat().
|
||||
*
|
||||
* As there is a race between openat() and fstatat() we don't
|
||||
* know if openat() in fact opened symlink or not. Therefore,
|
||||
* we have to compare uids even if fstatat() reports the opened
|
||||
* component isn't a symlink (as we don't know whether it was
|
||||
* symlink during openat() or not).
|
||||
*/
|
||||
|
||||
fd = ngx_openat_file(at_fd, name, mode, create, access);
|
||||
|
||||
if (fd == NGX_INVALID_FILE) {
|
||||
return NGX_INVALID_FILE;
|
||||
}
|
||||
|
||||
if (ngx_file_at_info(at_fd, name, &atfi, AT_SYMLINK_NOFOLLOW)
|
||||
== NGX_FILE_ERROR)
|
||||
{
|
||||
err = ngx_errno;
|
||||
goto failed;
|
||||
}
|
||||
|
||||
#if (NGX_HAVE_O_PATH)
|
||||
if (ngx_file_o_path_info(fd, &fi, log) == NGX_ERROR) {
|
||||
err = ngx_errno;
|
||||
goto failed;
|
||||
}
|
||||
#else
|
||||
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
|
||||
err = ngx_errno;
|
||||
goto failed;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (fi.st_uid != atfi.st_uid) {
|
||||
err = NGX_ELOOP;
|
||||
goto failed;
|
||||
}
|
||||
|
||||
return fd;
|
||||
|
||||
failed:
|
||||
|
||||
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
||||
ngx_close_file_n " \"%s\" failed", name);
|
||||
}
|
||||
|
||||
ngx_set_errno(err);
|
||||
|
||||
return NGX_INVALID_FILE;
|
||||
}
|
||||
|
||||
|
||||
#if (NGX_HAVE_O_PATH)
|
||||
|
||||
static ngx_int_t
|
||||
ngx_file_o_path_info(ngx_fd_t fd, ngx_file_info_t *fi, ngx_log_t *log)
|
||||
{
|
||||
static ngx_uint_t use_fstat = 1;
|
||||
|
||||
/*
|
||||
* In Linux 2.6.39 the O_PATH flag was introduced that allows to obtain
|
||||
* a descriptor without actually opening file or directory. It requires
|
||||
* less permissions for path components, but till Linux 3.6 fstat() returns
|
||||
* EBADF on such descriptors, and fstatat() with the AT_EMPTY_PATH flag
|
||||
* should be used instead.
|
||||
*
|
||||
* Three scenarios are handled in this function:
|
||||
*
|
||||
* 1) The kernel is newer than 3.6 or fstat() with O_PATH support was
|
||||
* backported by vendor. Then fstat() is used.
|
||||
*
|
||||
* 2) The kernel is newer than 2.6.39 but older than 3.6. In this case
|
||||
* the first call of fstat() returns EBADF and we fallback to fstatat()
|
||||
* with AT_EMPTY_PATH which was introduced at the same time as O_PATH.
|
||||
*
|
||||
* 3) The kernel is older than 2.6.39 but nginx was build with O_PATH
|
||||
* support. Since descriptors are opened with O_PATH|O_RDONLY flags
|
||||
* and O_PATH is ignored by the kernel then the O_RDONLY flag is
|
||||
* actually used. In this case fstat() just works.
|
||||
*/
|
||||
|
||||
if (use_fstat) {
|
||||
if (ngx_fd_info(fd, fi) != NGX_FILE_ERROR) {
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
if (ngx_errno != NGX_EBADF) {
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
ngx_log_error(NGX_LOG_NOTICE, log, 0,
|
||||
"fstat(O_PATH) failed with EBADF, "
|
||||
"switching to fstatat(AT_EMPTY_PATH)");
|
||||
|
||||
use_fstat = 0;
|
||||
}
|
||||
|
||||
if (ngx_file_at_info(fd, "", fi, AT_EMPTY_PATH) != NGX_FILE_ERROR) {
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
#endif /* NGX_HAVE_OPENAT */
|
||||
|
||||
|
||||
static ngx_fd_t
|
||||
ngx_open_file_wrapper(ngx_str_t *name, ngx_open_file_info_t *of,
|
||||
ngx_int_t mode, ngx_int_t create, ngx_int_t access, ngx_log_t *log)
|
||||
{
|
||||
ngx_fd_t fd;
|
||||
|
||||
#if !(NGX_HAVE_OPENAT)
|
||||
|
||||
fd = ngx_open_file(name->data, mode, create, access);
|
||||
|
||||
if (fd == NGX_INVALID_FILE) {
|
||||
of->err = ngx_errno;
|
||||
of->failed = ngx_open_file_n;
|
||||
return NGX_INVALID_FILE;
|
||||
}
|
||||
|
||||
return fd;
|
||||
|
||||
#else
|
||||
|
||||
u_char *p, *cp, *end;
|
||||
ngx_fd_t at_fd;
|
||||
ngx_str_t at_name;
|
||||
|
||||
if (of->disable_symlinks == NGX_DISABLE_SYMLINKS_OFF) {
|
||||
fd = ngx_open_file(name->data, mode, create, access);
|
||||
|
||||
if (fd == NGX_INVALID_FILE) {
|
||||
of->err = ngx_errno;
|
||||
of->failed = ngx_open_file_n;
|
||||
return NGX_INVALID_FILE;
|
||||
}
|
||||
|
||||
return fd;
|
||||
}
|
||||
|
||||
p = name->data;
|
||||
end = p + name->len;
|
||||
|
||||
at_name = *name;
|
||||
|
||||
if (of->disable_symlinks_from) {
|
||||
|
||||
cp = p + of->disable_symlinks_from;
|
||||
|
||||
*cp = '\0';
|
||||
|
||||
at_fd = ngx_open_file(p, NGX_FILE_SEARCH|NGX_FILE_NONBLOCK,
|
||||
NGX_FILE_OPEN, 0);
|
||||
|
||||
*cp = '/';
|
||||
|
||||
if (at_fd == NGX_INVALID_FILE) {
|
||||
of->err = ngx_errno;
|
||||
of->failed = ngx_open_file_n;
|
||||
return NGX_INVALID_FILE;
|
||||
}
|
||||
|
||||
at_name.len = of->disable_symlinks_from;
|
||||
p = cp + 1;
|
||||
|
||||
} else if (*p == '/') {
|
||||
|
||||
at_fd = ngx_open_file("/",
|
||||
NGX_FILE_SEARCH|NGX_FILE_NONBLOCK,
|
||||
NGX_FILE_OPEN, 0);
|
||||
|
||||
if (at_fd == NGX_INVALID_FILE) {
|
||||
of->err = ngx_errno;
|
||||
of->failed = ngx_openat_file_n;
|
||||
return NGX_INVALID_FILE;
|
||||
}
|
||||
|
||||
at_name.len = 1;
|
||||
p++;
|
||||
|
||||
} else {
|
||||
at_fd = NGX_AT_FDCWD;
|
||||
}
|
||||
|
||||
for ( ;; ) {
|
||||
cp = ngx_strlchr(p, end, '/');
|
||||
if (cp == NULL) {
|
||||
break;
|
||||
}
|
||||
|
||||
if (cp == p) {
|
||||
p++;
|
||||
continue;
|
||||
}
|
||||
|
||||
*cp = '\0';
|
||||
|
||||
if (of->disable_symlinks == NGX_DISABLE_SYMLINKS_NOTOWNER) {
|
||||
fd = ngx_openat_file_owner(at_fd, p,
|
||||
NGX_FILE_SEARCH|NGX_FILE_NONBLOCK,
|
||||
NGX_FILE_OPEN, 0, log);
|
||||
|
||||
} else {
|
||||
fd = ngx_openat_file(at_fd, p,
|
||||
NGX_FILE_SEARCH|NGX_FILE_NONBLOCK|NGX_FILE_NOFOLLOW,
|
||||
NGX_FILE_OPEN, 0);
|
||||
}
|
||||
|
||||
*cp = '/';
|
||||
|
||||
if (fd == NGX_INVALID_FILE) {
|
||||
of->err = ngx_errno;
|
||||
of->failed = ngx_openat_file_n;
|
||||
goto failed;
|
||||
}
|
||||
|
||||
if (at_fd != NGX_AT_FDCWD && ngx_close_file(at_fd) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
||||
ngx_close_file_n " \"%V\" failed", &at_name);
|
||||
}
|
||||
|
||||
p = cp + 1;
|
||||
at_fd = fd;
|
||||
at_name.len = cp - at_name.data;
|
||||
}
|
||||
|
||||
if (p == end) {
|
||||
|
||||
/*
|
||||
* If pathname ends with a trailing slash, assume the last path
|
||||
* component is a directory and reopen it with requested flags;
|
||||
* if not, fail with ENOTDIR as per POSIX.
|
||||
*
|
||||
* We cannot rely on O_DIRECTORY in the loop above to check
|
||||
* that the last path component is a directory because
|
||||
* O_DIRECTORY doesn't work on FreeBSD 8. Fortunately, by
|
||||
* reopening a directory, we don't depend on it at all.
|
||||
*/
|
||||
|
||||
fd = ngx_openat_file(at_fd, ".", mode, create, access);
|
||||
goto done;
|
||||
}
|
||||
|
||||
if (of->disable_symlinks == NGX_DISABLE_SYMLINKS_NOTOWNER
|
||||
&& !(create & (NGX_FILE_CREATE_OR_OPEN|NGX_FILE_TRUNCATE)))
|
||||
{
|
||||
fd = ngx_openat_file_owner(at_fd, p, mode, create, access, log);
|
||||
|
||||
} else {
|
||||
fd = ngx_openat_file(at_fd, p, mode|NGX_FILE_NOFOLLOW, create, access);
|
||||
}
|
||||
|
||||
done:
|
||||
|
||||
if (fd == NGX_INVALID_FILE) {
|
||||
of->err = ngx_errno;
|
||||
of->failed = ngx_openat_file_n;
|
||||
}
|
||||
|
||||
failed:
|
||||
|
||||
if (at_fd != NGX_AT_FDCWD && ngx_close_file(at_fd) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
||||
ngx_close_file_n " \"%V\" failed", &at_name);
|
||||
}
|
||||
|
||||
return fd;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
static ngx_int_t
|
||||
ngx_file_info_wrapper(ngx_str_t *name, ngx_open_file_info_t *of,
|
||||
ngx_file_info_t *fi, ngx_log_t *log)
|
||||
{
|
||||
ngx_int_t rc;
|
||||
|
||||
#if !(NGX_HAVE_OPENAT)
|
||||
|
||||
rc = ngx_file_info(name->data, fi);
|
||||
|
||||
if (rc == NGX_FILE_ERROR) {
|
||||
of->err = ngx_errno;
|
||||
of->failed = ngx_file_info_n;
|
||||
return NGX_FILE_ERROR;
|
||||
}
|
||||
|
||||
return rc;
|
||||
|
||||
#else
|
||||
|
||||
ngx_fd_t fd;
|
||||
|
||||
if (of->disable_symlinks == NGX_DISABLE_SYMLINKS_OFF) {
|
||||
|
||||
rc = ngx_file_info(name->data, fi);
|
||||
|
||||
if (rc == NGX_FILE_ERROR) {
|
||||
of->err = ngx_errno;
|
||||
of->failed = ngx_file_info_n;
|
||||
return NGX_FILE_ERROR;
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
fd = ngx_open_file_wrapper(name, of, NGX_FILE_RDONLY|NGX_FILE_NONBLOCK,
|
||||
NGX_FILE_OPEN, 0, log);
|
||||
|
||||
if (fd == NGX_INVALID_FILE) {
|
||||
return NGX_FILE_ERROR;
|
||||
}
|
||||
|
||||
rc = ngx_fd_info(fd, fi);
|
||||
|
||||
if (rc == NGX_FILE_ERROR) {
|
||||
of->err = ngx_errno;
|
||||
of->failed = ngx_fd_info_n;
|
||||
}
|
||||
|
||||
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
||||
ngx_close_file_n " \"%V\" failed", name);
|
||||
}
|
||||
|
||||
return rc;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
static ngx_int_t
|
||||
ngx_open_and_stat_file(ngx_str_t *name, ngx_open_file_info_t *of,
|
||||
ngx_log_t *log)
|
||||
{
|
||||
ngx_fd_t fd;
|
||||
ngx_file_info_t fi;
|
||||
|
||||
if (of->fd != NGX_INVALID_FILE) {
|
||||
|
||||
if (ngx_file_info_wrapper(name, of, &fi, log) == NGX_FILE_ERROR) {
|
||||
of->fd = NGX_INVALID_FILE;
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
if (of->uniq == ngx_file_uniq(&fi)) {
|
||||
goto done;
|
||||
}
|
||||
|
||||
} else if (of->test_dir) {
|
||||
|
||||
if (ngx_file_info_wrapper(name, of, &fi, log) == NGX_FILE_ERROR) {
|
||||
of->fd = NGX_INVALID_FILE;
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
if (ngx_is_dir(&fi)) {
|
||||
goto done;
|
||||
}
|
||||
}
|
||||
|
||||
if (!of->log) {
|
||||
|
||||
/*
|
||||
* Use non-blocking open() not to hang on FIFO files, etc.
|
||||
* This flag has no effect on a regular files.
|
||||
*/
|
||||
|
||||
fd = ngx_open_file_wrapper(name, of, NGX_FILE_RDONLY|NGX_FILE_NONBLOCK,
|
||||
NGX_FILE_OPEN, 0, log);
|
||||
|
||||
} else {
|
||||
fd = ngx_open_file_wrapper(name, of, NGX_FILE_APPEND,
|
||||
NGX_FILE_CREATE_OR_OPEN,
|
||||
NGX_FILE_DEFAULT_ACCESS, log);
|
||||
}
|
||||
|
||||
if (fd == NGX_INVALID_FILE) {
|
||||
of->fd = NGX_INVALID_FILE;
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
|
||||
ngx_fd_info_n " \"%V\" failed", name);
|
||||
|
||||
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
||||
ngx_close_file_n " \"%V\" failed", name);
|
||||
}
|
||||
|
||||
of->fd = NGX_INVALID_FILE;
|
||||
|
||||
return NGX_ERROR;
|
||||
}
|
||||
|
||||
if (ngx_is_dir(&fi)) {
|
||||
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
||||
ngx_close_file_n " \"%V\" failed", name);
|
||||
}
|
||||
|
||||
of->fd = NGX_INVALID_FILE;
|
||||
|
||||
} else {
|
||||
of->fd = fd;
|
||||
|
||||
if (of->read_ahead && ngx_file_size(&fi) > NGX_MIN_READ_AHEAD) {
|
||||
if (ngx_read_ahead(fd, of->read_ahead) == NGX_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
||||
ngx_read_ahead_n " \"%V\" failed", name);
|
||||
}
|
||||
}
|
||||
|
||||
if (of->directio <= ngx_file_size(&fi)) {
|
||||
if (ngx_directio_on(fd) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
||||
ngx_directio_on_n " \"%V\" failed", name);
|
||||
|
||||
} else {
|
||||
of->is_directio = 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
done:
|
||||
|
||||
of->uniq = ngx_file_uniq(&fi);
|
||||
of->mtime = ngx_file_mtime(&fi);
|
||||
of->size = ngx_file_size(&fi);
|
||||
of->fs_size = ngx_file_fs_size(&fi);
|
||||
of->is_dir = ngx_is_dir(&fi);
|
||||
of->is_file = ngx_is_file(&fi);
|
||||
of->is_link = ngx_is_link(&fi);
|
||||
of->is_exec = ngx_is_exec(&fi);
|
||||
|
||||
return NGX_OK;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* we ignore any possible event setting error and
|
||||
* fallback to usual periodic file retests
|
||||
*/
|
||||
|
||||
static void
|
||||
ngx_open_file_add_event(ngx_open_file_cache_t *cache,
|
||||
ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log)
|
||||
{
|
||||
ngx_open_file_cache_event_t *fev;
|
||||
|
||||
if (!(ngx_event_flags & NGX_USE_VNODE_EVENT)
|
||||
|| !of->events
|
||||
|| file->event
|
||||
|| of->fd == NGX_INVALID_FILE
|
||||
|| file->uses < of->min_uses)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
file->use_event = 0;
|
||||
|
||||
file->event = ngx_calloc(sizeof(ngx_event_t), log);
|
||||
if (file->event== NULL) {
|
||||
return;
|
||||
}
|
||||
|
||||
fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), log);
|
||||
if (fev == NULL) {
|
||||
ngx_free(file->event);
|
||||
file->event = NULL;
|
||||
return;
|
||||
}
|
||||
|
||||
fev->fd = of->fd;
|
||||
fev->file = file;
|
||||
fev->cache = cache;
|
||||
|
||||
file->event->handler = ngx_open_file_cache_remove;
|
||||
file->event->data = fev;
|
||||
|
||||
/*
|
||||
* although vnode event may be called while ngx_cycle->poll
|
||||
* destruction, however, cleanup procedures are run before any
|
||||
* memory freeing and events will be canceled.
|
||||
*/
|
||||
|
||||
file->event->log = ngx_cycle->log;
|
||||
|
||||
if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT)
|
||||
!= NGX_OK)
|
||||
{
|
||||
ngx_free(file->event->data);
|
||||
ngx_free(file->event);
|
||||
file->event = NULL;
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* we do not set file->use_event here because there may be a race
|
||||
* condition: a file may be deleted between opening the file and
|
||||
* adding event, so we rely upon event notification only after
|
||||
* one file revalidation on next file access
|
||||
*/
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
ngx_open_file_cleanup(void *data)
|
||||
{
|
||||
ngx_open_file_cache_cleanup_t *c = data;
|
||||
|
||||
c->file->count--;
|
||||
|
||||
ngx_close_cached_file(c->cache, c->file, c->min_uses, c->log);
|
||||
|
||||
/* drop one or two expired open files */
|
||||
ngx_expire_old_cached_files(c->cache, 1, c->log);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
ngx_close_cached_file(ngx_open_file_cache_t *cache,
|
||||
ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log)
|
||||
{
|
||||
ngx_log_debug5(NGX_LOG_DEBUG_CORE, log, 0,
|
||||
"close cached open file: %s, fd:%d, c:%d, u:%d, %d",
|
||||
file->name, file->fd, file->count, file->uses, file->close);
|
||||
|
||||
if (!file->close) {
|
||||
|
||||
file->accessed = ngx_time();
|
||||
|
||||
ngx_queue_remove(&file->queue);
|
||||
|
||||
ngx_queue_insert_head(&cache->expire_queue, &file->queue);
|
||||
|
||||
if (file->uses >= min_uses || file->count) {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
ngx_open_file_del_event(file);
|
||||
|
||||
if (file->count) {
|
||||
return;
|
||||
}
|
||||
|
||||
if (file->fd != NGX_INVALID_FILE) {
|
||||
|
||||
if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
|
||||
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
||||
ngx_close_file_n " \"%s\" failed", file->name);
|
||||
}
|
||||
|
||||
file->fd = NGX_INVALID_FILE;
|
||||
}
|
||||
|
||||
if (!file->close) {
|
||||
return;
|
||||
}
|
||||
|
||||
ngx_free(file->name);
|
||||
ngx_free(file);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
ngx_open_file_del_event(ngx_cached_open_file_t *file)
|
||||
{
|
||||
if (file->event == NULL) {
|
||||
return;
|
||||
}
|
||||
|
||||
(void) ngx_del_event(file->event, NGX_VNODE_EVENT,
|
||||
file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT);
|
||||
|
||||
ngx_free(file->event->data);
|
||||
ngx_free(file->event);
|
||||
file->event = NULL;
|
||||
file->use_event = 0;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n,
|
||||
ngx_log_t *log)
|
||||
{
|
||||
time_t now;
|
||||
ngx_queue_t *q;
|
||||
ngx_cached_open_file_t *file;
|
||||
|
||||
now = ngx_time();
|
||||
|
||||
/*
|
||||
* n == 1 deletes one or two inactive files
|
||||
* n == 0 deletes least recently used file by force
|
||||
* and one or two inactive files
|
||||
*/
|
||||
|
||||
while (n < 3) {
|
||||
|
||||
if (ngx_queue_empty(&cache->expire_queue)) {
|
||||
return;
|
||||
}
|
||||
|
||||
q = ngx_queue_last(&cache->expire_queue);
|
||||
|
||||
file = ngx_queue_data(q, ngx_cached_open_file_t, queue);
|
||||
|
||||
if (n++ != 0 && now - file->accessed <= cache->inactive) {
|
||||
return;
|
||||
}
|
||||
|
||||
ngx_queue_remove(q);
|
||||
|
||||
ngx_rbtree_delete(&cache->rbtree, &file->node);
|
||||
|
||||
cache->current--;
|
||||
|
||||
ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0,
|
||||
"expire cached open file: %s", file->name);
|
||||
|
||||
if (!file->err && !file->is_dir) {
|
||||
file->close = 1;
|
||||
ngx_close_cached_file(cache, file, 0, log);
|
||||
|
||||
} else {
|
||||
ngx_free(file->name);
|
||||
ngx_free(file);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp,
|
||||
ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
|
||||
{
|
||||
ngx_rbtree_node_t **p;
|
||||
ngx_cached_open_file_t *file, *file_temp;
|
||||
|
||||
for ( ;; ) {
|
||||
|
||||
if (node->key < temp->key) {
|
||||
|
||||
p = &temp->left;
|
||||
|
||||
} else if (node->key > temp->key) {
|
||||
|
||||
p = &temp->right;
|
||||
|
||||
} else { /* node->key == temp->key */
|
||||
|
||||
file = (ngx_cached_open_file_t *) node;
|
||||
file_temp = (ngx_cached_open_file_t *) temp;
|
||||
|
||||
p = (ngx_strcmp(file->name, file_temp->name) < 0)
|
||||
? &temp->left : &temp->right;
|
||||
}
|
||||
|
||||
if (*p == sentinel) {
|
||||
break;
|
||||
}
|
||||
|
||||
temp = *p;
|
||||
}
|
||||
|
||||
*p = node;
|
||||
node->parent = temp;
|
||||
node->left = sentinel;
|
||||
node->right = sentinel;
|
||||
ngx_rbt_red(node);
|
||||
}
|
||||
|
||||
|
||||
static ngx_cached_open_file_t *
|
||||
ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name,
|
||||
uint32_t hash)
|
||||
{
|
||||
ngx_int_t rc;
|
||||
ngx_rbtree_node_t *node, *sentinel;
|
||||
ngx_cached_open_file_t *file;
|
||||
|
||||
node = cache->rbtree.root;
|
||||
sentinel = cache->rbtree.sentinel;
|
||||
|
||||
while (node != sentinel) {
|
||||
|
||||
if (hash < node->key) {
|
||||
node = node->left;
|
||||
continue;
|
||||
}
|
||||
|
||||
if (hash > node->key) {
|
||||
node = node->right;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* hash == node->key */
|
||||
|
||||
file = (ngx_cached_open_file_t *) node;
|
||||
|
||||
rc = ngx_strcmp(name->data, file->name);
|
||||
|
||||
if (rc == 0) {
|
||||
return file;
|
||||
}
|
||||
|
||||
node = (rc < 0) ? node->left : node->right;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
ngx_open_file_cache_remove(ngx_event_t *ev)
|
||||
{
|
||||
ngx_cached_open_file_t *file;
|
||||
ngx_open_file_cache_event_t *fev;
|
||||
|
||||
fev = ev->data;
|
||||
file = fev->file;
|
||||
|
||||
ngx_queue_remove(&file->queue);
|
||||
|
||||
ngx_rbtree_delete(&fev->cache->rbtree, &file->node);
|
||||
|
||||
fev->cache->current--;
|
||||
|
||||
/* NGX_ONESHOT_EVENT was already deleted */
|
||||
file->event = NULL;
|
||||
file->use_event = 0;
|
||||
|
||||
file->close = 1;
|
||||
|
||||
ngx_close_cached_file(fev->cache, file, 0, ev->log);
|
||||
|
||||
/* free memory only when fev->cache and fev->file are already not needed */
|
||||
|
||||
ngx_free(ev->data);
|
||||
ngx_free(ev);
|
||||
}
|
||||
Reference in New Issue
Block a user