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ngx_file.h
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1 
2 /*
3  * Copyright (C) Igor Sysoev
4  * Copyright (C) Nginx, Inc.
5  */
6 
7 
8 #ifndef _NGX_FILE_H_INCLUDED_
9 #define _NGX_FILE_H_INCLUDED_
10 
11 
12 #include <ngx_config.h>
13 #include <ngx_core.h>
14 
15 
16 struct ngx_file_s {
17  ngx_fd_t fd;
18  ngx_str_t name;
19  ngx_file_info_t info;
20 
21  off_t offset;
22  off_t sys_offset;
23 
24  ngx_log_t *log;
25 
26 #if (NGX_HAVE_FILE_AIO)
27  ngx_event_aio_t *aio;
28 #endif
29 
30  unsigned valid_info:1;
31  unsigned directio:1;
32 };
33 
34 
35 #define NGX_MAX_PATH_LEVEL 3
36 
37 
38 typedef time_t (*ngx_path_manager_pt) (void *data);
39 typedef void (*ngx_path_loader_pt) (void *data);
40 
41 
42 typedef struct {
43  ngx_str_t name;
44  size_t len;
45  size_t level[3];
46 
47  ngx_path_manager_pt manager;
48  ngx_path_loader_pt loader;
49  void *data;
50 
51  u_char *conf_file;
52  ngx_uint_t line;
53 } ngx_path_t;
54 
55 
56 typedef struct {
57  ngx_str_t name;
58  size_t level[3];
59 } ngx_path_init_t;
60 
61 
62 typedef struct {
63  ngx_file_t file;
64  off_t offset;
65  ngx_path_t *path;
66  ngx_pool_t *pool;
67  char *warn;
68 
69  ngx_uint_t access;
70 
71  unsigned log_level:8;
72  unsigned persistent:1;
73  unsigned clean:1;
74 } ngx_temp_file_t;
75 
76 
77 typedef struct {
78  ngx_uint_t access;
79  ngx_uint_t path_access;
80  time_t time;
81  ngx_fd_t fd;
82 
83  unsigned create_path:1;
84  unsigned delete_file:1;
85 
86  ngx_log_t *log;
87 } ngx_ext_rename_file_t;
88 
89 
90 typedef struct {
91  off_t size;
92  size_t buf_size;
93 
94  ngx_uint_t access;
95  time_t time;
96 
97  ngx_log_t *log;
98 } ngx_copy_file_t;
99 
100 
101 typedef struct ngx_tree_ctx_s ngx_tree_ctx_t;
102 
103 typedef ngx_int_t (*ngx_tree_init_handler_pt) (void *ctx, void *prev);
104 typedef ngx_int_t (*ngx_tree_handler_pt) (ngx_tree_ctx_t *ctx, ngx_str_t *name);
105 
106 struct ngx_tree_ctx_s {
107  off_t size;
108  off_t fs_size;
109  ngx_uint_t access;
110  time_t mtime;
111 
112  ngx_tree_init_handler_pt init_handler;
113  ngx_tree_handler_pt file_handler;
114  ngx_tree_handler_pt pre_tree_handler;
115  ngx_tree_handler_pt post_tree_handler;
116  ngx_tree_handler_pt spec_handler;
117 
118  void *data;
119  size_t alloc;
120 
121  ngx_log_t *log;
122 };
123 
124 
125 ssize_t ngx_write_chain_to_temp_file(ngx_temp_file_t *tf, ngx_chain_t *chain);
126 ngx_int_t ngx_create_temp_file(ngx_file_t *file, ngx_path_t *path,
127  ngx_pool_t *pool, ngx_uint_t persistent, ngx_uint_t clean,
128  ngx_uint_t access);
129 void ngx_create_hashed_filename(ngx_path_t *path, u_char *file, size_t len);
130 ngx_int_t ngx_create_path(ngx_file_t *file, ngx_path_t *path);
131 ngx_err_t ngx_create_full_path(u_char *dir, ngx_uint_t access);
132 ngx_int_t ngx_add_path(ngx_conf_t *cf, ngx_path_t **slot);
133 ngx_int_t ngx_create_paths(ngx_cycle_t *cycle, ngx_uid_t user);
134 ngx_int_t ngx_ext_rename_file(ngx_str_t *src, ngx_str_t *to,
135  ngx_ext_rename_file_t *ext);
136 ngx_int_t ngx_copy_file(u_char *from, u_char *to, ngx_copy_file_t *cf);
137 ngx_int_t ngx_walk_tree(ngx_tree_ctx_t *ctx, ngx_str_t *tree);
138 
139 ngx_atomic_uint_t ngx_next_temp_number(ngx_uint_t collision);
140 
141 char *ngx_conf_set_path_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
142 char *ngx_conf_merge_path_value(ngx_conf_t *cf, ngx_path_t **path,
143  ngx_path_t *prev, ngx_path_init_t *init);
144 char *ngx_conf_set_access_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
145 
146 
147 extern ngx_atomic_t *ngx_temp_number;
148 extern ngx_atomic_int_t ngx_random_number;
149 
150 
151 #endif /* _NGX_FILE_H_INCLUDED_ */
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