Mercurial > hg > nginx-quic
view src/http/ngx_http_script.h @ 7374:de50fa05fbeb
Cache: fixed minimum cache keys zone size limit.
Size of a shared memory zones must be at least two pages - one page
for slab allocator internal data, and another page for actual allocations.
Using 8192 instead is wrong, as there are systems with page sizes other
than 4096.
Note well that two pages is usually too low as well. In particular, cache
is likely to use two allocations of different sizes for global structures,
and at least four pages will be needed to properly allocate cache nodes.
Except in a few very special cases, with keys zone of just two pages nginx
won't be able to start. Other uses of shared memory impose a limit
of 8 pages, which provides some room for global allocations. This patch
doesn't try to address this though.
Inspired by ticket #1665.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 31 Oct 2018 16:49:39 +0300 |
parents | e4590dfd97ff |
children | 5efc23d83bc2 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_HTTP_SCRIPT_H_INCLUDED_ #define _NGX_HTTP_SCRIPT_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> typedef struct { u_char *ip; u_char *pos; ngx_http_variable_value_t *sp; ngx_str_t buf; ngx_str_t line; /* the start of the rewritten arguments */ u_char *args; unsigned flushed:1; unsigned skip:1; unsigned quote:1; unsigned is_args:1; unsigned log:1; ngx_int_t status; ngx_http_request_t *request; } ngx_http_script_engine_t; typedef struct { ngx_conf_t *cf; ngx_str_t *source; ngx_array_t **flushes; ngx_array_t **lengths; ngx_array_t **values; ngx_uint_t variables; ngx_uint_t ncaptures; ngx_uint_t captures_mask; ngx_uint_t size; void *main; unsigned compile_args:1; unsigned complete_lengths:1; unsigned complete_values:1; unsigned zero:1; unsigned conf_prefix:1; unsigned root_prefix:1; unsigned dup_capture:1; unsigned args:1; } ngx_http_script_compile_t; typedef struct { ngx_str_t value; ngx_uint_t *flushes; void *lengths; void *values; } ngx_http_complex_value_t; typedef struct { ngx_conf_t *cf; ngx_str_t *value; ngx_http_complex_value_t *complex_value; unsigned zero:1; unsigned conf_prefix:1; unsigned root_prefix:1; } ngx_http_compile_complex_value_t; typedef void (*ngx_http_script_code_pt) (ngx_http_script_engine_t *e); typedef size_t (*ngx_http_script_len_code_pt) (ngx_http_script_engine_t *e); typedef struct { ngx_http_script_code_pt code; uintptr_t len; } ngx_http_script_copy_code_t; typedef struct { ngx_http_script_code_pt code; uintptr_t index; } ngx_http_script_var_code_t; typedef struct { ngx_http_script_code_pt code; ngx_http_set_variable_pt handler; uintptr_t data; } ngx_http_script_var_handler_code_t; typedef struct { ngx_http_script_code_pt code; uintptr_t n; } ngx_http_script_copy_capture_code_t; #if (NGX_PCRE) typedef struct { ngx_http_script_code_pt code; ngx_http_regex_t *regex; ngx_array_t *lengths; uintptr_t size; uintptr_t status; uintptr_t next; unsigned test:1; unsigned negative_test:1; unsigned uri:1; unsigned args:1; /* add the r->args to the new arguments */ unsigned add_args:1; unsigned redirect:1; unsigned break_cycle:1; ngx_str_t name; } ngx_http_script_regex_code_t; typedef struct { ngx_http_script_code_pt code; unsigned uri:1; unsigned args:1; /* add the r->args to the new arguments */ unsigned add_args:1; unsigned redirect:1; } ngx_http_script_regex_end_code_t; #endif typedef struct { ngx_http_script_code_pt code; uintptr_t conf_prefix; } ngx_http_script_full_name_code_t; typedef struct { ngx_http_script_code_pt code; uintptr_t status; ngx_http_complex_value_t text; } ngx_http_script_return_code_t; typedef enum { ngx_http_script_file_plain = 0, ngx_http_script_file_not_plain, ngx_http_script_file_dir, ngx_http_script_file_not_dir, ngx_http_script_file_exists, ngx_http_script_file_not_exists, ngx_http_script_file_exec, ngx_http_script_file_not_exec } ngx_http_script_file_op_e; typedef struct { ngx_http_script_code_pt code; uintptr_t op; } ngx_http_script_file_code_t; typedef struct { ngx_http_script_code_pt code; uintptr_t next; void **loc_conf; } ngx_http_script_if_code_t; typedef struct { ngx_http_script_code_pt code; ngx_array_t *lengths; } ngx_http_script_complex_value_code_t; typedef struct { ngx_http_script_code_pt code; uintptr_t value; uintptr_t text_len; uintptr_t text_data; } ngx_http_script_value_code_t; void ngx_http_script_flush_complex_value(ngx_http_request_t *r, ngx_http_complex_value_t *val); ngx_int_t ngx_http_complex_value(ngx_http_request_t *r, ngx_http_complex_value_t *val, ngx_str_t *value); ngx_int_t ngx_http_compile_complex_value(ngx_http_compile_complex_value_t *ccv); char *ngx_http_set_complex_value_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); ngx_int_t ngx_http_test_predicates(ngx_http_request_t *r, ngx_array_t *predicates); char *ngx_http_set_predicate_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); ngx_uint_t ngx_http_script_variables_count(ngx_str_t *value); ngx_int_t ngx_http_script_compile(ngx_http_script_compile_t *sc); u_char *ngx_http_script_run(ngx_http_request_t *r, ngx_str_t *value, void *code_lengths, size_t reserved, void *code_values); void ngx_http_script_flush_no_cacheable_variables(ngx_http_request_t *r, ngx_array_t *indices); void *ngx_http_script_start_code(ngx_pool_t *pool, ngx_array_t **codes, size_t size); void *ngx_http_script_add_code(ngx_array_t *codes, size_t size, void *code); size_t ngx_http_script_copy_len_code(ngx_http_script_engine_t *e); void ngx_http_script_copy_code(ngx_http_script_engine_t *e); size_t ngx_http_script_copy_var_len_code(ngx_http_script_engine_t *e); void ngx_http_script_copy_var_code(ngx_http_script_engine_t *e); size_t ngx_http_script_copy_capture_len_code(ngx_http_script_engine_t *e); void ngx_http_script_copy_capture_code(ngx_http_script_engine_t *e); size_t ngx_http_script_mark_args_code(ngx_http_script_engine_t *e); void ngx_http_script_start_args_code(ngx_http_script_engine_t *e); #if (NGX_PCRE) void ngx_http_script_regex_start_code(ngx_http_script_engine_t *e); void ngx_http_script_regex_end_code(ngx_http_script_engine_t *e); #endif void ngx_http_script_return_code(ngx_http_script_engine_t *e); void ngx_http_script_break_code(ngx_http_script_engine_t *e); void ngx_http_script_if_code(ngx_http_script_engine_t *e); void ngx_http_script_equal_code(ngx_http_script_engine_t *e); void ngx_http_script_not_equal_code(ngx_http_script_engine_t *e); void ngx_http_script_file_code(ngx_http_script_engine_t *e); void ngx_http_script_complex_value_code(ngx_http_script_engine_t *e); void ngx_http_script_value_code(ngx_http_script_engine_t *e); void ngx_http_script_set_var_code(ngx_http_script_engine_t *e); void ngx_http_script_var_set_handler_code(ngx_http_script_engine_t *e); void ngx_http_script_var_code(ngx_http_script_engine_t *e); void ngx_http_script_nop_code(ngx_http_script_engine_t *e); #endif /* _NGX_HTTP_SCRIPT_H_INCLUDED_ */