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Changed the VM hooks a bit to better match the corresponding driver hooks.

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Added file cache hook function that gets the extents of a file.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8842 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2004-09-04 17:13:45 +00:00
parent 9edfb372ab
commit 7af4ca8acf
1 changed files with 14 additions and 5 deletions
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19
headers/os/drivers/fs_interface.h
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@ -1,15 +1,16 @@
/* File System Interface Layer Definition
**
** Distributed under the terms of the OpenBeOS License.
** Distributed under the terms of the Haiku License.
*/
#ifndef _FS_INTERFACE_H
#define _FS_INTERFACE_H
#include <OS.h>
#include <module.h>
#include <vfs_types.h>
struct dirent;
struct stat;
struct fs_info;
@ -36,6 +37,11 @@ enum write_stat_mask {
/* passed to write_fs_info() */
#define FS_WRITE_FSINFO_NAME 0x0001
struct file_io_vec {
off_t offset;
off_t length;
};
#define B_CURRENT_FS_API_VERSION "/v1"
#ifdef __cplusplus
@ -62,9 +68,12 @@ typedef struct file_system_info {
status_t (*remove_vnode)(fs_volume fs, fs_vnode vnode, bool reenter);
/* VM file access */
status_t (*can_page)(fs_volume fs, fs_vnode v);
ssize_t (*read_pages)(fs_volume fs, fs_vnode v, iovecs *vecs, off_t pos);
ssize_t (*write_pages)(fs_volume fs, fs_vnode v, iovecs *vecs, off_t pos);
bool (*can_page)(fs_volume fs, fs_vnode vnode);
status_t (*read_pages)(fs_volume fs, fs_vnode vnode, off_t pos, const iovec *vecs, size_t count, size_t *_numBytes);
status_t (*write_pages)(fs_volume fs, fs_vnode vnode, off_t pos, const iovec *vecs, size_t count, size_t *_numBytes);
/* cache file access */
status_t (*get_file_map)(fs_volume fs, fs_vnode vnode, struct file_io_vec *vecs, size_t *_count);
/* common operations */
status_t (*ioctl)(fs_volume fs, fs_vnode v, fs_cookie cookie, ulong op, void *buffer, size_t length);