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 /* operations valid on file descriptor objects */
  34 struct fd_ops
  35 {
  36     /* get the events we want to poll() for on this object */
  37     int  (*get_poll_events)(struct fd *);
  38     /* a poll() event occurred */
  39     void (*poll_event)(struct fd *,int event);
  40     /* flush the object buffers */
  41     void (*flush)(struct fd *, struct event **);
  42     /* get file information */
  43     enum server_fd_type (*get_fd_type)(struct fd *fd);
  44     /* perform an ioctl on the file */
  45     obj_handle_t (*ioctl)(struct fd *fd, ioctl_code_t code, const async_data_t *async, int blocking,
  46                           const void *data, data_size_t size);
  47     /* queue an async operation */
  48     void (*queue_async)(struct fd *, const async_data_t *data, int type, int count);
  49     /* selected events for async i/o need an update */
  50     void (*reselect_async)( struct fd *, struct async_queue *queue );
  51     /* cancel an async operation */
  52     void (*cancel_async)(struct fd *, struct process *process, struct thread *thread, client_ptr_t iosb);
  53 };
  54
  55 /* file descriptor functions */
  56
  57 extern struct fd *alloc_pseudo_fd( const struct fd_ops *fd_user_ops, struct object *user,
  58                                    unsigned int options );
  59 extern void set_no_fd_status( struct fd *fd, unsigned int status );
  60 extern struct fd *open_fd( struct fd *root, const char *name, int flags, mode_t *mode,
  61                            unsigned int access, unsigned int sharing, unsigned int options );
  62 extern struct fd *create_anonymous_fd( const struct fd_ops *fd_user_ops,
  63                                        int unix_fd, struct object *user, unsigned int options );
  64 extern struct fd *dup_fd_object( struct fd *orig, unsigned int access, unsigned int sharing,
  65                                  unsigned int options );
  66 extern struct fd *get_fd_object_for_mapping( struct fd *fd, unsigned int access, unsigned int sharing );
  67 extern void *get_fd_user( struct fd *fd );
  68 extern void set_fd_user( struct fd *fd, const struct fd_ops *ops, struct object *user );
  69 extern unsigned int get_fd_options( struct fd *fd );
  70 extern int get_unix_fd( struct fd *fd );
  71 extern int is_same_file_fd( struct fd *fd1, struct fd *fd2 );
  72 extern int is_fd_removable( struct fd *fd );
  73 extern int fd_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
  74 extern int check_fd_events( struct fd *fd, int events );
  75 extern void set_fd_events( struct fd *fd, int events );
  76 extern obj_handle_t lock_fd( struct fd *fd, file_pos_t offset, file_pos_t count, int shared, int wait );
  77 extern void unlock_fd( struct fd *fd, file_pos_t offset, file_pos_t count );
  78 extern void allow_fd_caching( struct fd *fd );
  79 extern void set_fd_signaled( struct fd *fd, int signaled );
  80 extern int is_fd_signaled( struct fd *fd );
  81
  82 extern int default_fd_signaled( struct object *obj, struct wait_queue_entry *entry );
  83 extern unsigned int default_fd_map_access( struct object *obj, unsigned int access );
  84 extern int default_fd_get_poll_events( struct fd *fd );
  85 extern void default_poll_event( struct fd *fd, int event );
  86 extern struct async *fd_queue_async( struct fd *fd, const async_data_t *data, int type );
  87 extern void fd_async_wake_up( struct fd *fd, int type, unsigned int status );
  88 extern void fd_reselect_async( struct fd *fd, struct async_queue *queue );
  89 extern obj_handle_t no_fd_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async,
  90                                  int blocking, const void *data, data_size_t size );
  91 extern obj_handle_t default_fd_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async,
  92                                       int blocking, const void *data, data_size_t size );
  93 extern void no_fd_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
  94 extern void default_fd_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
  95 extern void default_fd_reselect_async( struct fd *fd, struct async_queue *queue );
  96 extern void default_fd_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb );
  97 extern void no_flush( struct fd *fd, struct event **event );
  98 extern void main_loop(void);
  99 extern void remove_process_locks( struct process *process );
 100
 101 static inline struct fd *get_obj_fd( struct object *obj ) { return obj->ops->get_fd( obj ); }
 102
 103 /* timeout functions */
 104
 105 struct timeout_user;
 106 extern timeout_t current_time;
 107
 108 #define TICKS_PER_SEC 10000000
 109
 110 typedef void (*timeout_callback)( void *private );
 111
 112 extern struct timeout_user *add_timeout_user( timeout_t when, timeout_callback func, void *private );
 113 extern void remove_timeout_user( struct timeout_user *user );
 114 extern const char *get_timeout_str( timeout_t timeout );
 115
 116 /* file functions */
 117
 118 extern struct file *get_file_obj( struct process *process, obj_handle_t handle,
 119                                   unsigned int access );
 120 extern int get_file_unix_fd( struct file *file );
 121 extern int is_same_file( struct file *file1, struct file *file2 );
 122 extern struct file *create_file_for_fd( int fd, unsigned int access, unsigned int sharing );
 123 extern struct file *create_file_for_fd_obj( struct fd *fd, unsigned int access, unsigned int sharing );
 124 extern void file_set_error(void);
 125 extern struct security_descriptor *mode_to_sd( mode_t mode, const SID *user, const SID *group );
 126 extern mode_t sd_to_mode( const struct security_descriptor *sd, const SID *owner );
 127
 128 /* file mapping functions */
 129
 130 extern struct mapping *get_mapping_obj( struct process *process, obj_handle_t handle,
 131                                         unsigned int access );
 132 extern obj_handle_t open_mapping_file( struct process *process, struct mapping *mapping,
 133                                        unsigned int access, unsigned int sharing );
 134 extern struct mapping *grab_mapping_unless_removable( struct mapping *mapping );
 135 extern int get_page_size(void);
 136
 137 /* change notification functions */
 138
 139 extern void do_change_notify( int unix_fd );
 140 extern void sigio_callback(void);
 141 extern struct object *create_dir_obj( struct fd *fd, unsigned int access, mode_t mode );
 142 extern struct dir *get_dir_obj( struct process *process, obj_handle_t handle, unsigned int access );
 143
 144 /* completion */
 145
 146 extern struct completion *get_completion_obj( struct process *process, obj_handle_t handle, unsigned int access );
 147 extern void add_completion( struct completion *completion, apc_param_t ckey, apc_param_t cvalue,
 148                             unsigned int status, apc_param_t information );
 149
 150 /* serial port functions */
 151
 152 extern int is_serial_fd( struct fd *fd );
 153 extern struct object *create_serial( struct fd *fd );
 154
 155 /* async I/O functions */
 156 extern struct async_queue *create_async_queue( struct fd *fd );
 157 extern void free_async_queue( struct async_queue *queue );
 158 extern struct async *create_async( struct thread *thread, struct async_queue *queue,
 159                                    const async_data_t *data );
 160 extern void async_set_timeout( struct async *async, timeout_t timeout, unsigned int status );
 161 extern void async_set_result( struct object *obj, unsigned int status,
 162                               apc_param_t total, client_ptr_t apc );
 163 extern int async_queued( struct async_queue *queue );
 164 extern int async_waiting( struct async_queue *queue );
 165 extern void async_terminate( struct async *async, unsigned int status );
 166 extern int async_wake_up_by( struct async_queue *queue, struct process *process,
 167                              struct thread *thread, client_ptr_t iosb, unsigned int status );
 168 extern void async_wake_up( struct async_queue *queue, unsigned int status );
 169 extern struct completion *fd_get_completion( struct fd *fd, apc_param_t *p_key );
 170 extern void fd_copy_completion( struct fd *src, struct fd *dst );
 171
 172 /* access rights that require Unix read permission */
 173 #define FILE_UNIX_READ_ACCESS (FILE_READ_DATA|FILE_READ_ATTRIBUTES|FILE_READ_EA)
 174
 175 /* access rights that require Unix write permission */
 176 #define FILE_UNIX_WRITE_ACCESS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_ATTRIBUTES|FILE_WRITE_EA)
 177
 178 /* magic file access rights for mappings */
 179 #define FILE_MAPPING_IMAGE  0x80000000  /* set for SEC_IMAGE mappings */
 180 #define FILE_MAPPING_WRITE  0x40000000  /* set for writable shared mappings */
 181 #define FILE_MAPPING_ACCESS 0x20000000  /* set for all mappings */
 182
 183 #endif  /* __WINE_SERVER_FILE_H */