server/file.h

   1 /*
   2  * Server-side file definitions
   3  *
   4  * Copyright (C) 2003 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #ifndef __WINE_SERVER_FILE_H
  22 #define __WINE_SERVER_FILE_H
  23
  24 #include <sys/types.h>
  25
  26 #include "object.h"
  27
  28 struct fd;
  29 struct mapping;
  30 struct async_queue;
  31 struct completion;
  32
  33 /* server-side representation of I/O status block */
  34 struct iosb
  35 {
  36     struct object obj;          /* object header */
  37     unsigned int  status;       /* resulting status (or STATUS_PENDING) */
  38     data_size_t   result;       /* size of result (input or output depending on the type) */
  39     data_size_t   in_size;      /* size of input data */
  40     void         *in_data;      /* input data */
  41     data_size_t   out_size;     /* size of output data */
  42     void         *out_data;     /* output data */
  43 };
  44
  45 struct async_queue
  46 {
  47     struct list queue;          /* queue of async objects */
  48 };
  49
  50 /* operations valid on file descriptor objects */
  51 struct fd_ops
  52 {
  53     /* get the events we want to poll() for on this object */
  54     int  (*get_poll_events)(struct fd *);
  55     /* a poll() event occurred */
  56     void (*poll_event)(struct fd *,int event);
  57     /* get file information */
  58     enum server_fd_type (*get_fd_type)(struct fd *fd);
  59     /* perform a read on the file */
  60     int (*read)(struct fd *, struct async *, file_pos_t );
  61     /* perform a write on the file */
  62     int (*write)(struct fd *, struct async *, file_pos_t );
  63     /* flush the object buffers */
  64     int (*flush)(struct fd *, struct async *);
  65     /* query file info */
  66     void (*get_file_info)( struct fd *, obj_handle_t, unsigned int );
  67     /* query volume info */
  68     void (*get_volume_info)( struct fd *, unsigned int );
  69     /* perform an ioctl on the file */
  70     int (*ioctl)(struct fd *fd, ioctl_code_t code, struct async *async );
  71     /* queue an async operation */
  72     void (*queue_async)(struct fd *, struct async *async, int type, int count);
  73     /* selected events for async i/o need an update */
  74     void (*reselect_async)( struct fd *, struct async_queue *queue );
  75 };
  76
  77 /* file descriptor functions */
  78
  79 extern struct fd *alloc_pseudo_fd( const struct fd_ops *fd_user_ops, struct object *user,
  80                                    unsigned int options );
  81 extern struct fd *open_fd( struct fd *root, const char *name, int flags, mode_t *mode,
  82                            unsigned int access, unsigned int sharing, unsigned int options );
  83 extern struct fd *create_anonymous_fd( const struct fd_ops *fd_user_ops,
  84                                        int unix_fd, struct object *user, unsigned int options );
  85 extern struct fd *dup_fd_object( struct fd *orig, unsigned int access, unsigned int sharing,
  86                                  unsigned int options );
  87 extern struct fd *get_fd_object_for_mapping( struct fd *fd, unsigned int access, unsigned int sharing );
  88 extern void *get_fd_user( struct fd *fd );
  89 extern void set_fd_user( struct fd *fd, const struct fd_ops *ops, struct object *user );
  90 extern unsigned int get_fd_options( struct fd *fd );
  91 extern int is_fd_overlapped( struct fd *fd );
  92 extern int get_unix_fd( struct fd *fd );
  93 extern int is_same_file_fd( struct fd *fd1, struct fd *fd2 );
  94 extern int is_fd_removable( struct fd *fd );
  95 extern int fd_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
  96 extern int check_fd_events( struct fd *fd, int events );
  97 extern void set_fd_events( struct fd *fd, int events );
  98 extern obj_handle_t lock_fd( struct fd *fd, file_pos_t offset, file_pos_t count, int shared, int wait );
  99 extern void unlock_fd( struct fd *fd, file_pos_t offset, file_pos_t count );
 100 extern void allow_fd_caching( struct fd *fd );
 101 extern void set_fd_signaled( struct fd *fd, int signaled );
 102 extern int is_fd_signaled( struct fd *fd );
 103 extern char *dup_fd_name( struct fd *root, const char *name );
 104
 105 extern int default_fd_signaled( struct object *obj, struct wait_queue_entry *entry );
 106 extern unsigned int default_fd_map_access( struct object *obj, unsigned int access );
 107 extern int default_fd_get_poll_events( struct fd *fd );
 108 extern void default_poll_event( struct fd *fd, int event );
 109 extern void fd_queue_async( struct fd *fd, struct async *async, int type );
 110 extern void fd_async_wake_up( struct fd *fd, int type, unsigned int status );
 111 extern void fd_reselect_async( struct fd *fd, struct async_queue *queue );
 112 extern int no_fd_read( struct fd *fd, struct async *async, file_pos_t pos );
 113 extern int no_fd_write( struct fd *fd, struct async *async, file_pos_t pos );
 114 extern int no_fd_flush( struct fd *fd, struct async *async );
 115 extern void no_fd_get_file_info( struct fd *fd, obj_handle_t handle, unsigned int info_class );
 116 extern void default_fd_get_file_info( struct fd *fd, obj_handle_t handle, unsigned int info_class );
 117 extern void no_fd_get_volume_info( struct fd *fd, unsigned int info_class );
 118 extern int no_fd_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
 119 extern int default_fd_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
 120 extern void no_fd_queue_async( struct fd *fd, struct async *async, int type, int count );
 121 extern void default_fd_queue_async( struct fd *fd, struct async *async, int type, int count );
 122 extern void default_fd_reselect_async( struct fd *fd, struct async_queue *queue );
 123 extern void main_loop(void);
 124 extern void remove_process_locks( struct process *process );
 125
 126 static inline struct fd *get_obj_fd( struct object *obj ) { return obj->ops->get_fd( obj ); }
 127
 128 /* timeout functions */
 129
 130 struct timeout_user;
 131 extern timeout_t current_time;
 132 extern timeout_t monotonic_time;
 133
 134 #define TICKS_PER_SEC 10000000
 135
 136 typedef void (*timeout_callback)( void *private );
 137
 138 static inline abstime_t timeout_to_abstime( timeout_t timeout )
 139 {
 140     return timeout > 0 ? timeout : timeout - monotonic_time;
 141 }
 142
 143 static inline timeout_t abstime_to_timeout( abstime_t abstime )
 144 {
 145     if (abstime > 0) return abstime;
 146     return -abstime < monotonic_time ? 0 : abstime + monotonic_time;
 147 }
 148
 149 extern void set_current_time( void );
 150 extern struct timeout_user *add_timeout_user( timeout_t when, timeout_callback func, void *private );
 151 extern void remove_timeout_user( struct timeout_user *user );
 152 extern const char *get_timeout_str( timeout_t timeout );
 153
 154 /* file functions */
 155
 156 extern struct file *get_file_obj( struct process *process, obj_handle_t handle,
 157                                   unsigned int access );
 158 extern int get_file_unix_fd( struct file *file );
 159 extern struct file *create_file_for_fd( int fd, unsigned int access, unsigned int sharing );
 160 extern struct file *create_file_for_fd_obj( struct fd *fd, unsigned int access, unsigned int sharing );
 161 extern void file_set_error(void);
 162 extern struct object_type *file_get_type( struct object *obj );
 163 extern struct security_descriptor *mode_to_sd( mode_t mode, const SID *user, const SID *group );
 164 extern mode_t sd_to_mode( const struct security_descriptor *sd, const SID *owner );
 165 extern int is_file_executable( const char *name );
 166
 167 /* file mapping functions */
 168
 169 extern struct mapping *get_mapping_obj( struct process *process, obj_handle_t handle,
 170                                         unsigned int access );
 171 extern struct file *get_mapping_file( struct process *process, client_ptr_t base,
 172                                       unsigned int access, unsigned int sharing );
 173 extern void free_mapped_views( struct process *process );
 174 extern int get_page_size(void);
 175
 176 /* device functions */
 177
 178 extern struct object *create_named_pipe_device( struct object *root, const struct unicode_str *name );
 179 extern struct object *create_mailslot_device( struct object *root, const struct unicode_str *name );
 180 extern struct object *create_unix_device( struct object *root, const struct unicode_str *name,
 181                                           const char *unix_path );
 182
 183 /* change notification functions */
 184
 185 extern void do_change_notify( int unix_fd );
 186 extern void sigio_callback(void);
 187 extern struct object *create_dir_obj( struct fd *fd, unsigned int access, mode_t mode );
 188 extern struct dir *get_dir_obj( struct process *process, obj_handle_t handle, unsigned int access );
 189
 190 /* completion */
 191
 192 extern struct completion *get_completion_obj( struct process *process, obj_handle_t handle, unsigned int access );
 193 extern void add_completion( struct completion *completion, apc_param_t ckey, apc_param_t cvalue,
 194                             unsigned int status, apc_param_t information );
 195
 196 /* serial port functions */
 197
 198 extern int is_serial_fd( struct fd *fd );
 199 extern struct object *create_serial( struct fd *fd );
 200
 201 /* async I/O functions */
 202 extern void free_async_queue( struct async_queue *queue );
 203 extern struct async *create_async( struct fd *fd, struct thread *thread, const async_data_t *data, struct iosb *iosb );
 204 extern struct async *create_request_async( struct fd *fd, unsigned int comp_flags, const async_data_t *data );
 205 extern obj_handle_t async_handoff( struct async *async, int success, data_size_t *result, int force_blocking );
 206 extern void queue_async( struct async_queue *queue, struct async *async );
 207 extern void async_set_timeout( struct async *async, timeout_t timeout, unsigned int status );
 208 extern void async_set_result( struct object *obj, unsigned int status, apc_param_t total );
 209 extern void set_async_pending( struct async *async, int signal );
 210 extern int async_waiting( struct async_queue *queue );
 211 extern void async_terminate( struct async *async, unsigned int status );
 212 extern void async_wake_up( struct async_queue *queue, unsigned int status );
 213 extern struct completion *fd_get_completion( struct fd *fd, apc_param_t *p_key );
 214 extern void fd_copy_completion( struct fd *src, struct fd *dst );
 215 extern struct iosb *create_iosb( const void *in_data, data_size_t in_size, data_size_t out_size );
 216 extern struct iosb *async_get_iosb( struct async *async );
 217 extern int async_is_blocking( struct async *async );
 218 extern struct async *find_pending_async( struct async_queue *queue );
 219 extern void cancel_process_asyncs( struct process *process );
 220
 221 static inline void init_async_queue( struct async_queue *queue )
 222 {
 223     list_init( &queue->queue );
 224 }
 225
 226 static inline int async_queued( struct async_queue *queue )
 227 {
 228     return !list_empty( &queue->queue );
 229 }
 230
 231
 232 /* access rights that require Unix read permission */
 233 #define FILE_UNIX_READ_ACCESS (FILE_READ_DATA|FILE_READ_ATTRIBUTES|FILE_READ_EA)
 234
 235 /* access rights that require Unix write permission */
 236 #define FILE_UNIX_WRITE_ACCESS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_ATTRIBUTES|FILE_WRITE_EA)
 237
 238 /* magic file access rights for mappings */
 239 #define FILE_MAPPING_IMAGE  0x80000000  /* set for SEC_IMAGE mappings */
 240 #define FILE_MAPPING_WRITE  0x40000000  /* set for writable shared mappings */
 241 #define FILE_MAPPING_ACCESS 0x20000000  /* set for all mappings */
 242
 243 #endif  /* __WINE_SERVER_FILE_H */