mirror of
https://review.haiku-os.org/haiku
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7f12cc54a7
partially (e.g. due to hitting the end of file). The respective
classes have grown new methods and attributes to deal with that. The
"finished" callbacks have got additional parameters to indicate
whether the transfer was only partial and how much has been
transferred. Other callbacks and functions have a size_t* in/out
parameter instead of a simple size_t, now.
* vfs_{read,write}_pages() do now use the I/O request framework instead
of the underlying FS's {read,write}_pages() hooks (those should be
unused now). Furthermore they've got an additional "flags" parameter,
which is passed to IORequest::Init(), i.e. it allows to specify that
the given vecs refer to physical addresses.
* The file cache's read_into_cache() reads directly into physical
pages, now.
* Fixed bug in DoIO::IO(): The offset was not adjusted, so that all
pages were incorrectly transferred from/to the same location.
* Fixed broken subrequest scheduling loop head in
do_iterative_fd_io_iterate().
* Adjusted the test driver and implemented its io() hook. Using this
driver I/O requests are passed all the way from the VFS/VM to the
driver and through the I/O scheduler. It even seems to work. :-)
* Added missing const to the iovec* parameter of the IORequest::Init()
methods.
* Disabled some debug output by default. Added new optional debug
output.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26692 a95241bf-73f2-0310-859d-f6bbb57e9c96
407 lines
16 KiB
C
407 lines
16 KiB
C
/*
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* Copyright 2004-2008, Haiku Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _FSSH_FS_INTERFACE_H
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#define _FSSH_FS_INTERFACE_H
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/*! File System Interface Layer Definition */
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#include "fssh_disk_device_defs.h"
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#include "fssh_module.h"
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#include "fssh_os.h"
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struct fssh_dirent;
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struct fssh_fs_info;
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struct fssh_iovec;
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struct fssh_partition_data;
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struct fssh_selectsync;
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struct fssh_stat;
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typedef fssh_dev_t fssh_mount_id;
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typedef fssh_ino_t fssh_vnode_id;
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/* the file system's private data structures */
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typedef void *fssh_fs_cookie;
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typedef struct FSSHIORequest fssh_io_request;
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/* additional flags passed to write_stat() */
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#define FSSH_B_STAT_SIZE_INSECURE 0x2000
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/* passed to write_fs_info() */
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#define FSSH_FS_WRITE_FSINFO_NAME 0x0001
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struct fssh_file_io_vec {
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fssh_off_t offset;
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fssh_off_t length;
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};
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#define FSSH_B_CURRENT_FS_API_VERSION "/v1"
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// flags for publish_vnode() and fs_volume_ops::get_vnode()
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#define FSSH_B_VNODE_PUBLISH_REMOVED 0x01
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#define FSSH_B_VNODE_DONT_CREATE_SPECIAL_SUB_NODE 0x02
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct fssh_fs_volume fssh_fs_volume;
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typedef struct fssh_fs_volume_ops fssh_fs_volume_ops;
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typedef struct fssh_fs_vnode fssh_fs_vnode;
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typedef struct fssh_fs_vnode_ops fssh_fs_vnode_ops;
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struct fssh_fs_volume {
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fssh_dev_t id;
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int32_t layer;
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void* private_volume;
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fssh_fs_volume_ops* ops;
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fssh_fs_volume* sub_volume;
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fssh_fs_volume* super_volume;
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};
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struct fssh_fs_vnode {
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void* private_node;
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fssh_fs_vnode_ops* ops;
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};
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struct fssh_fs_volume_ops {
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fssh_status_t (*unmount)(fssh_fs_volume *volume);
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fssh_status_t (*read_fs_info)(fssh_fs_volume *volume,
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struct fssh_fs_info *info);
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fssh_status_t (*write_fs_info)(fssh_fs_volume *volume,
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const struct fssh_fs_info *info, uint32_t mask);
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fssh_status_t (*sync)(fssh_fs_volume *volume);
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fssh_status_t (*get_vnode)(fssh_fs_volume *volume, fssh_vnode_id id,
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fssh_fs_vnode *_vnode, int *_type, uint32_t *_flags,
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bool reenter);
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/* index directory & index operations */
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fssh_status_t (*open_index_dir)(fssh_fs_volume *volume,
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fssh_fs_cookie *cookie);
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fssh_status_t (*close_index_dir)(fssh_fs_volume *volume,
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fssh_fs_cookie cookie);
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fssh_status_t (*free_index_dir_cookie)(fssh_fs_volume *volume,
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fssh_fs_cookie cookie);
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fssh_status_t (*read_index_dir)(fssh_fs_volume *volume,
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fssh_fs_cookie cookie, struct fssh_dirent *buffer,
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fssh_size_t bufferSize, uint32_t *_num);
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fssh_status_t (*rewind_index_dir)(fssh_fs_volume *volume,
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fssh_fs_cookie cookie);
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fssh_status_t (*create_index)(fssh_fs_volume *volume, const char *name,
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uint32_t type, uint32_t flags);
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fssh_status_t (*remove_index)(fssh_fs_volume *volume, const char *name);
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fssh_status_t (*read_index_stat)(fssh_fs_volume *volume, const char *name,
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struct fssh_stat *stat);
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/* query operations */
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fssh_status_t (*open_query)(fssh_fs_volume *volume, const char *query,
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uint32_t flags, fssh_port_id port, uint32_t token,
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fssh_fs_cookie *_cookie);
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fssh_status_t (*close_query)(fssh_fs_volume *volume, fssh_fs_cookie cookie);
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fssh_status_t (*free_query_cookie)(fssh_fs_volume *volume,
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fssh_fs_cookie cookie);
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fssh_status_t (*read_query)(fssh_fs_volume *volume, fssh_fs_cookie cookie,
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struct fssh_dirent *buffer, fssh_size_t bufferSize,
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uint32_t *_num);
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fssh_status_t (*rewind_query)(fssh_fs_volume *volume,
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fssh_fs_cookie cookie);
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/* support for FS layers */
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fssh_status_t (*create_sub_vnode)(fssh_fs_volume *volume, fssh_ino_t id,
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fssh_fs_vnode *vnode);
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fssh_status_t (*delete_sub_vnode)(fssh_fs_volume *volume,
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fssh_fs_vnode *vnode);
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};
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struct fssh_fs_vnode_ops {
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/* vnode operations */
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fssh_status_t (*lookup)(fssh_fs_volume *volume, fssh_fs_vnode *dir,
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const char *name, fssh_vnode_id *_id);
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fssh_status_t (*get_vnode_name)(fssh_fs_volume *volume,
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fssh_fs_vnode *vnode, char *buffer, fssh_size_t bufferSize);
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fssh_status_t (*put_vnode)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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bool reenter);
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fssh_status_t (*remove_vnode)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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bool reenter);
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/* VM file access */
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bool (*can_page)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie);
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fssh_status_t (*read_pages)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, fssh_off_t pos, const fssh_iovec *vecs,
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fssh_size_t count, fssh_size_t *_numBytes);
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fssh_status_t (*write_pages)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, fssh_off_t pos, const fssh_iovec *vecs,
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fssh_size_t count, fssh_size_t *_numBytes);
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/* asynchronous I/O */
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fssh_status_t (*io)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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void *cookie, fssh_io_request *request);
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fssh_status_t (*cancel_io)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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void *cookie, fssh_io_request *request);
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/* cache file access */
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fssh_status_t (*get_file_map)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_off_t offset, fssh_size_t size,
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struct fssh_file_io_vec *vecs, fssh_size_t *_count);
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/* common operations */
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fssh_status_t (*ioctl)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, fssh_ulong op, void *buffer,
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fssh_size_t length);
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fssh_status_t (*set_flags)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, int flags);
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fssh_status_t (*select)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, uint8_t event, fssh_selectsync *sync);
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fssh_status_t (*deselect)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, uint8_t event, fssh_selectsync *sync);
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fssh_status_t (*fsync)(fssh_fs_volume *volume, fssh_fs_vnode *vnode);
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fssh_status_t (*read_symlink)(fssh_fs_volume *volume, fssh_fs_vnode *link,
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char *buffer, fssh_size_t *_bufferSize);
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fssh_status_t (*create_symlink)(fssh_fs_volume *volume, fssh_fs_vnode *dir,
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const char *name, const char *path, int mode);
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fssh_status_t (*link)(fssh_fs_volume *volume, fssh_fs_vnode *dir,
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const char *name, fssh_fs_vnode *vnode);
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fssh_status_t (*unlink)(fssh_fs_volume *volume, fssh_fs_vnode *dir,
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const char *name);
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fssh_status_t (*rename)(fssh_fs_volume *volume, fssh_fs_vnode *fromDir,
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const char *fromName, fssh_fs_vnode *toDir, const char *toName);
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fssh_status_t (*access)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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int mode);
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fssh_status_t (*read_stat)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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struct fssh_stat *stat);
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fssh_status_t (*write_stat)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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const struct fssh_stat *stat, uint32_t statMask);
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/* file operations */
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fssh_status_t (*create)(fssh_fs_volume *volume, fssh_fs_vnode *dir,
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const char *name, int openMode, int perms,
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fssh_fs_cookie *_cookie, fssh_vnode_id *_newVnodeID);
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fssh_status_t (*open)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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int openMode, fssh_fs_cookie *_cookie);
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fssh_status_t (*close)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie);
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fssh_status_t (*free_cookie)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie);
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fssh_status_t (*read)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, fssh_off_t pos, void *buffer,
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fssh_size_t *length);
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fssh_status_t (*write)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, fssh_off_t pos, const void *buffer,
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fssh_size_t *length);
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/* directory operations */
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fssh_status_t (*create_dir)(fssh_fs_volume *volume, fssh_fs_vnode *parent,
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const char *name, int perms, fssh_vnode_id *_newVnodeID);
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fssh_status_t (*remove_dir)(fssh_fs_volume *volume, fssh_fs_vnode *parent,
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const char *name);
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fssh_status_t (*open_dir)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie *_cookie);
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fssh_status_t (*close_dir)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie);
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fssh_status_t (*free_dir_cookie)(fssh_fs_volume *volume,
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fssh_fs_vnode *vnode, fssh_fs_cookie cookie);
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fssh_status_t (*read_dir)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, struct fssh_dirent *buffer,
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fssh_size_t bufferSize, uint32_t *_num);
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fssh_status_t (*rewind_dir)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie);
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/* attribute directory operations */
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fssh_status_t (*open_attr_dir)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie *_cookie);
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fssh_status_t (*close_attr_dir)(fssh_fs_volume *volume,
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fssh_fs_vnode *vnode, fssh_fs_cookie cookie);
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fssh_status_t (*free_attr_dir_cookie)(fssh_fs_volume *volume,
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fssh_fs_vnode *vnode, fssh_fs_cookie cookie);
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fssh_status_t (*read_attr_dir)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, struct fssh_dirent *buffer,
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fssh_size_t bufferSize, uint32_t *_num);
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fssh_status_t (*rewind_attr_dir)(fssh_fs_volume *volume,
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fssh_fs_vnode *vnode, fssh_fs_cookie cookie);
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/* attribute operations */
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fssh_status_t (*create_attr)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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const char *name, uint32_t type, int openMode,
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fssh_fs_cookie *_cookie);
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fssh_status_t (*open_attr)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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const char *name, int openMode, fssh_fs_cookie *_cookie);
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fssh_status_t (*close_attr)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie);
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fssh_status_t (*free_attr_cookie)(fssh_fs_volume *volume,
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fssh_fs_vnode *vnode, fssh_fs_cookie cookie);
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fssh_status_t (*read_attr)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, fssh_off_t pos, void *buffer,
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fssh_size_t *length);
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fssh_status_t (*write_attr)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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fssh_fs_cookie cookie, fssh_off_t pos, const void *buffer,
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fssh_size_t *length);
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fssh_status_t (*read_attr_stat)(fssh_fs_volume *volume,
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fssh_fs_vnode *vnode, fssh_fs_cookie cookie,
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struct fssh_stat *stat);
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fssh_status_t (*write_attr_stat)(fssh_fs_volume *volume,
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fssh_fs_vnode *vnode, fssh_fs_cookie cookie,
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const struct fssh_stat *stat, int statMask);
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fssh_status_t (*rename_attr)(fssh_fs_volume *volume,
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fssh_fs_vnode *fromVnode, const char *fromName,
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fssh_fs_vnode *toVnode, const char *toName);
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fssh_status_t (*remove_attr)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
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const char *name);
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/* support for vnode and FS layers */
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fssh_status_t (*create_special_node)(fssh_fs_volume *volume,
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fssh_fs_vnode *dir, const char *name, fssh_fs_vnode *subVnode,
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fssh_mode_t mode, uint32_t flags, fssh_fs_vnode *_superVnode,
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fssh_ino_t *_nodeID);
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fssh_status_t (*get_super_vnode)(fssh_fs_volume *volume,
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fssh_fs_vnode *vnode, fssh_fs_volume *superVolume,
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fssh_fs_vnode *superVnode);
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};
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typedef struct fssh_file_system_module_info {
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struct fssh_module_info info;
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const char* short_name;
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const char* pretty_name;
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uint32_t flags; // DDM flags
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/* scanning (the device is write locked) */
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float (*identify_partition)(int fd, fssh_partition_data *partition,
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void **cookie);
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fssh_status_t (*scan_partition)(int fd, fssh_partition_data *partition,
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void *cookie);
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void (*free_identify_partition_cookie)(fssh_partition_data *partition,
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void *cookie);
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void (*free_partition_content_cookie)(fssh_partition_data *partition);
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/* general operations */
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fssh_status_t (*mount)(fssh_fs_volume *volume, const char *device,
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uint32_t flags, const char *args, fssh_vnode_id *_rootVnodeID);
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/* capability querying (the device is read locked) */
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uint32_t (*get_supported_operations)(fssh_partition_data* partition,
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uint32_t mask);
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bool (*validate_resize)(fssh_partition_data *partition, fssh_off_t *size);
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bool (*validate_move)(fssh_partition_data *partition, fssh_off_t *start);
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bool (*validate_set_content_name)(fssh_partition_data *partition,
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char *name);
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bool (*validate_set_content_parameters)(fssh_partition_data *partition,
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const char *parameters);
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bool (*validate_initialize)(fssh_partition_data *partition, char *name,
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const char *parameters);
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/* shadow partition modification (device is write locked) */
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fssh_status_t (*shadow_changed)(fssh_partition_data *partition,
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fssh_partition_data *child, uint32_t operation);
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/* writing (the device is NOT locked) */
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fssh_status_t (*defragment)(int fd, fssh_partition_id partition,
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fssh_disk_job_id job);
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fssh_status_t (*repair)(int fd, fssh_partition_id partition, bool checkOnly,
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fssh_disk_job_id job);
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fssh_status_t (*resize)(int fd, fssh_partition_id partition,
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fssh_off_t size, fssh_disk_job_id job);
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fssh_status_t (*move)(int fd, fssh_partition_id partition,
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fssh_off_t offset, fssh_disk_job_id job);
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fssh_status_t (*set_content_name)(int fd, fssh_partition_id partition,
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const char *name, fssh_disk_job_id job);
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fssh_status_t (*set_content_parameters)(int fd, fssh_partition_id partition,
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const char *parameters, fssh_disk_job_id job);
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fssh_status_t (*initialize)(int fd, fssh_partition_id partition,
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const char *name, const char *parameters,
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fssh_off_t partitionSize, fssh_disk_job_id job);
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} fssh_file_system_module_info;
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/* file system add-ons only prototypes */
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// callbacks for do_iterative_fd_io()
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typedef fssh_status_t (*fssh_iterative_io_get_vecs)(void *cookie,
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fssh_io_request* request, fssh_off_t offset, fssh_size_t size,
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struct fssh_file_io_vec *vecs, fssh_size_t *_count);
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typedef fssh_status_t (*fssh_iterative_io_finished)(void* cookie,
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fssh_io_request* request, fssh_status_t status,
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bool partialTransfer, fssh_size_t bytesTransferred);
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extern fssh_status_t fssh_new_vnode(fssh_fs_volume *volume,
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fssh_vnode_id vnodeID, void *privateNode,
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fssh_fs_vnode_ops *ops);
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extern fssh_status_t fssh_publish_vnode(fssh_fs_volume *volume,
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fssh_vnode_id vnodeID, void *privateNode,
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fssh_fs_vnode_ops *ops, int type, uint32_t flags);
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extern fssh_status_t fssh_get_vnode(fssh_fs_volume *volume,
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fssh_vnode_id vnodeID, void **_privateNode);
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extern fssh_status_t fssh_put_vnode(fssh_fs_volume *volume,
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fssh_vnode_id vnodeID);
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extern fssh_status_t fssh_remove_vnode(fssh_fs_volume *volume,
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fssh_vnode_id vnodeID);
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extern fssh_status_t fssh_unremove_vnode(fssh_fs_volume *volume,
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fssh_vnode_id vnodeID);
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extern fssh_status_t fssh_get_vnode_removed(fssh_fs_volume *volume,
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fssh_vnode_id vnodeID, bool* removed);
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extern fssh_fs_volume* fssh_volume_for_vnode(fssh_fs_vnode *vnode);
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extern fssh_status_t fssh_read_pages(int fd, fssh_off_t pos,
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const struct fssh_iovec *vecs, fssh_size_t count,
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fssh_size_t *_numBytes);
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extern fssh_status_t fssh_write_pages(int fd, fssh_off_t pos,
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const struct fssh_iovec *vecs, fssh_size_t count,
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fssh_size_t *_numBytes);
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extern fssh_status_t fssh_read_file_io_vec_pages(int fd,
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const struct fssh_file_io_vec *fileVecs,
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fssh_size_t fileVecCount, const struct fssh_iovec *vecs,
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fssh_size_t vecCount, uint32_t *_vecIndex,
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fssh_size_t *_vecOffset, fssh_size_t *_bytes);
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extern fssh_status_t fssh_write_file_io_vec_pages(int fd,
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const struct fssh_file_io_vec *fileVecs,
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fssh_size_t fileVecCount, const struct fssh_iovec *vecs,
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fssh_size_t vecCount, uint32_t *_vecIndex,
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fssh_size_t *_vecOffset, fssh_size_t *_bytes);
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extern fssh_status_t fssh_do_fd_io(int fd, fssh_io_request *request);
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extern fssh_status_t fssh_do_iterative_fd_io(int fd, fssh_io_request *request,
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fssh_iterative_io_get_vecs getVecs,
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fssh_iterative_io_finished finished, void *cookie);
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extern fssh_status_t fssh_notify_entry_created(fssh_mount_id device,
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fssh_vnode_id directory, const char *name, fssh_vnode_id node);
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extern fssh_status_t fssh_notify_entry_removed(fssh_mount_id device,
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fssh_vnode_id directory, const char *name, fssh_vnode_id node);
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extern fssh_status_t fssh_notify_entry_moved(fssh_mount_id device,
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fssh_vnode_id fromDirectory, const char *fromName,
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fssh_vnode_id toDirectory, const char *toName,
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fssh_vnode_id node);
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extern fssh_status_t fssh_notify_stat_changed(fssh_mount_id device,
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fssh_vnode_id node, uint32_t statFields);
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extern fssh_status_t fssh_notify_attribute_changed(fssh_mount_id device,
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fssh_vnode_id node, const char *attribute, int32_t cause);
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extern fssh_status_t fssh_notify_query_entry_created(fssh_port_id port,
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int32_t token, fssh_mount_id device,
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fssh_vnode_id directory, const char *name,
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fssh_vnode_id node);
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extern fssh_status_t fssh_notify_query_entry_removed(fssh_port_id port,
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int32_t token, fssh_mount_id device,
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fssh_vnode_id directory, const char *name,
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fssh_vnode_id node);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FSSH_FS_INTERFACE_H */
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