47f39c93cb
VFS's interface, so that a file system only has to implement one interface. As a side effect, the automatic file system detection may now work (not yet tested, though). git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12786 a95241bf-73f2-0310-859d-f6bbb57e9c96
259 lines
12 KiB
C
259 lines
12 KiB
C
/* File System Interface Layer Definition
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*
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* Copyright 2004-2005, 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 _FS_INTERFACE_H
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#define _FS_INTERFACE_H
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#include <OS.h>
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#include <Select.h>
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#include <module.h>
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#include <disk_device_manager.h>
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#include <sys/uio.h>
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struct dirent;
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struct stat;
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struct fs_info;
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struct select_sync;
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typedef dev_t mount_id;
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typedef ino_t vnode_id;
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/* the file system's private data structures */
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typedef void *fs_volume;
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typedef void *fs_cookie;
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typedef void *fs_vnode;
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/* passed to write_stat() */
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enum write_stat_mask {
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FS_WRITE_STAT_MODE = 0x0001,
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FS_WRITE_STAT_UID = 0x0002,
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FS_WRITE_STAT_GID = 0x0004,
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FS_WRITE_STAT_SIZE = 0x0008,
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FS_WRITE_STAT_ATIME = 0x0010,
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FS_WRITE_STAT_MTIME = 0x0020,
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FS_WRITE_STAT_CRTIME = 0x0040
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// NOTE: Changing these constants will break
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// src/kits/storage/LibBeAdapter.cpp:_kern_write_stat().
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};
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/* passed to write_fs_info() */
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#define FS_WRITE_FSINFO_NAME 0x0001
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struct file_io_vec {
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off_t offset;
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off_t length;
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};
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#define B_CURRENT_FS_API_VERSION "/v1"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct file_system_module_info {
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struct module_info info;
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const char *pretty_name;
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/* scanning (the device is write locked) */
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float (*identify_partition)(int fd, partition_data *partition,
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void **cookie);
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status_t (*scan_partition)(int fd, partition_data *partition,
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void *cookie);
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void (*free_identify_partition_cookie)(partition_data *partition,
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void *cookie);
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void (*free_partition_content_cookie)(partition_data *partition);
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/* general operations */
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status_t (*mount)(mount_id id, const char *device, uint32 flags,
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const char *args, fs_volume *_fs, vnode_id *_rootVnodeID);
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status_t (*unmount)(fs_volume fs);
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status_t (*read_fs_info)(fs_volume fs, struct fs_info *info);
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status_t (*write_fs_info)(fs_volume fs, const struct fs_info *info, uint32 mask);
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status_t (*sync)(fs_volume fs);
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/* vnode operations */
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status_t (*lookup)(fs_volume fs, fs_vnode dir, const char *name, vnode_id *_id, int *_type);
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status_t (*get_vnode_name)(fs_volume fs, fs_vnode vnode, char *buffer, size_t bufferSize);
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status_t (*get_vnode)(fs_volume fs, vnode_id id, fs_vnode *_vnode, bool reenter);
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status_t (*put_vnode)(fs_volume fs, fs_vnode vnode, bool reenter);
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status_t (*remove_vnode)(fs_volume fs, fs_vnode vnode, bool reenter);
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/* VM file access */
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bool (*can_page)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
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status_t (*read_pages)(fs_volume fs, fs_vnode vnode, fs_cookie cookie, off_t pos, const iovec *vecs, size_t count, size_t *_numBytes);
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status_t (*write_pages)(fs_volume fs, fs_vnode vnode, fs_cookie cookie, off_t pos, const iovec *vecs, size_t count, size_t *_numBytes);
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/* cache file access */
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status_t (*get_file_map)(fs_volume fs, fs_vnode vnode, off_t offset, size_t size, struct file_io_vec *vecs, size_t *_count);
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/* common operations */
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status_t (*ioctl)(fs_volume fs, fs_vnode v, fs_cookie cookie, ulong op, void *buffer, size_t length);
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status_t (*set_flags)(fs_volume fs, fs_vnode v, fs_cookie cookie, int flags);
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status_t (*select)(fs_volume fs, fs_vnode v, fs_cookie cookie, uint8 event,
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uint32 ref, selectsync *sync);
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status_t (*deselect)(fs_volume fs, fs_vnode v, fs_cookie cookie,
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uint8 event, selectsync *sync);
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status_t (*fsync)(fs_volume fs, fs_vnode v);
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status_t (*read_link)(fs_volume fs, fs_vnode link, char *buffer, size_t *_bufferSize);
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status_t (*write_link)(fs_volume fs, fs_vnode link, char *toPath);
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status_t (*create_symlink)(fs_volume fs, fs_vnode dir, const char *name, const char *path, int mode);
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status_t (*link)(fs_volume fs, fs_vnode dir, const char *name, fs_vnode vnode);
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status_t (*unlink)(fs_volume fs, fs_vnode dir, const char *name);
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status_t (*rename)(fs_volume fs, fs_vnode fromDir, const char *fromName, fs_vnode toDir, const char *toName);
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status_t (*access)(fs_volume fs, fs_vnode vnode, int mode);
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status_t (*read_stat)(fs_volume fs, fs_vnode vnode, struct stat *stat);
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status_t (*write_stat)(fs_volume fs, fs_vnode vnode, const struct stat *stat, uint32 statMask);
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/* file operations */
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status_t (*create)(fs_volume fs, fs_vnode dir, const char *name, int openMode, int perms, fs_cookie *_cookie, vnode_id *_newVnodeID);
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status_t (*open)(fs_volume fs, fs_vnode v, int openMode, fs_cookie *_cookie);
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status_t (*close)(fs_volume fs, fs_vnode v, fs_cookie cookie);
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status_t (*free_cookie)(fs_volume fs, fs_vnode v, fs_cookie cookie);
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status_t (*read)(fs_volume fs, fs_vnode v, fs_cookie cookie, off_t pos, void *buffer, size_t *length);
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status_t (*write)(fs_volume fs, fs_vnode v, fs_cookie cookie, off_t pos, const void *buffer, size_t *length);
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/* directory operations */
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status_t (*create_dir)(fs_volume fs, fs_vnode parent, const char *name, int perms, vnode_id *_newVnodeID);
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status_t (*remove_dir)(fs_volume fs, fs_vnode parent, const char *name);
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status_t (*open_dir)(fs_volume fs, fs_vnode vnode, fs_cookie *_cookie);
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status_t (*close_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
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status_t (*free_dir_cookie)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
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status_t (*read_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie, struct dirent *buffer, size_t bufferSize, uint32 *_num);
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status_t (*rewind_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
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/* attribute directory operations */
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status_t (*open_attr_dir)(fs_volume fs, fs_vnode vnode, fs_cookie *_cookie);
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status_t (*close_attr_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
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status_t (*free_attr_dir_cookie)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
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status_t (*read_attr_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie, struct dirent *buffer, size_t bufferSize, uint32 *_num);
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status_t (*rewind_attr_dir)(fs_volume fs, fs_vnode vnode, fs_cookie cookie);
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/* attribute operations */
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status_t (*create_attr)(fs_volume fs, fs_vnode file, const char *name, uint32 type, int openMode, fs_cookie *_cookie);
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status_t (*open_attr)(fs_volume fs, fs_vnode file, const char *name, int openMode, fs_cookie *_cookie);
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status_t (*close_attr)(fs_volume fs, fs_vnode file, fs_cookie cookie);
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status_t (*free_attr_cookie)(fs_volume fs, fs_vnode file, fs_cookie cookie);
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status_t (*read_attr)(fs_volume fs, fs_vnode file, fs_cookie cookie, off_t pos, void *buffer, size_t *length);
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status_t (*write_attr)(fs_volume fs, fs_vnode file, fs_cookie cookie, off_t pos, const void *buffer, size_t *length);
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status_t (*read_attr_stat)(fs_volume fs, fs_vnode file, fs_cookie cookie, struct stat *stat);
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status_t (*write_attr_stat)(fs_volume fs, fs_vnode file, fs_cookie cookie, const struct stat *stat, int statMask);
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status_t (*rename_attr)(fs_volume fs, fs_vnode fromFile, const char *fromName, fs_vnode toFile, const char *toName);
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status_t (*remove_attr)(fs_volume fs, fs_vnode file, const char *name);
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/* index directory & index operations */
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status_t (*open_index_dir)(fs_volume fs, fs_cookie *cookie);
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status_t (*close_index_dir)(fs_volume fs, fs_cookie cookie);
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status_t (*free_index_dir_cookie)(fs_volume fs, fs_cookie cookie);
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status_t (*read_index_dir)(fs_volume fs, fs_cookie cookie, struct dirent *buffer, size_t bufferSize, uint32 *_num);
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status_t (*rewind_index_dir)(fs_volume fs, fs_cookie cookie);
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status_t (*create_index)(fs_volume fs, const char *name, uint32 type, uint32 flags);
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status_t (*remove_index)(fs_volume fs, const char *name);
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status_t (*read_index_stat)(fs_volume fs, const char *name, struct stat *stat);
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/* query operations */
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status_t (*open_query)(fs_volume fs, const char *query, uint32 flags, port_id port, uint32 token, fs_cookie *_cookie);
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status_t (*close_query)(fs_volume fs, fs_cookie cookie);
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status_t (*free_query_cookie)(fs_volume fs, fs_cookie cookie);
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status_t (*read_query)(fs_volume fs, fs_cookie cookie,
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struct dirent *buffer, size_t bufferSize, uint32 *_num);
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status_t (*rewind_query)(fs_volume fs, fs_cookie cookie);
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/* capability querying (the device is read locked) */
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// ToDo: this will probably be combined to a single call
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bool (*supports_defragmenting)(partition_data *partition,
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bool *whileMounted);
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bool (*supports_repairing)(partition_data *partition,
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bool checkOnly, bool *whileMounted);
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bool (*supports_resizing)(partition_data *partition,
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bool *whileMounted);
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bool (*supports_moving)(partition_data *partition, bool *isNoOp);
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bool (*supports_setting_content_name)(partition_data *partition,
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bool *whileMounted);
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bool (*supports_setting_content_parameters)(partition_data *partition,
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bool *whileMounted);
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bool (*supports_initializing)(partition_data *partition);
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bool (*validate_resize)(partition_data *partition, off_t *size);
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bool (*validate_move)(partition_data *partition, off_t *start);
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bool (*validate_set_content_name)(partition_data *partition,
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char *name);
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bool (*validate_set_content_parameters)(partition_data *partition,
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const char *parameters);
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bool (*validate_initialize)(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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status_t (*shadow_changed)(partition_data *partition,
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uint32 operation);
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/* writing (the device is NOT locked) */
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status_t (*defragment)(int fd, partition_id partition,
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disk_job_id job);
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status_t (*repair)(int fd, partition_id partition, bool checkOnly,
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disk_job_id job);
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status_t (*resize)(int fd, partition_id partition, off_t size,
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disk_job_id job);
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status_t (*move)(int fd, partition_id partition, off_t offset,
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disk_job_id job);
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status_t (*set_content_name)(int fd, partition_id partition,
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const char *name, disk_job_id job);
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status_t (*set_content_parameters)(int fd, partition_id partition,
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const char *parameters, disk_job_id job);
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status_t (*initialize)(const char *partition, const char *name,
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const char *parameters, disk_job_id job);
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// This is pretty close to how the hook in R5 looked. Save the job ID, of
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// course and that the parameters were given as (void*, size_t) pair.
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} file_system_module_info;
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/* file system add-ons only prototypes */
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extern status_t new_vnode(mount_id mountID, vnode_id vnodeID, fs_vnode privateNode);
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extern status_t publish_vnode(mount_id mountID, vnode_id vnodeID, fs_vnode privateNode);
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extern status_t get_vnode(mount_id mountID, vnode_id vnodeID, fs_vnode *_privateNode);
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extern status_t put_vnode(mount_id mountID, vnode_id vnodeID);
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extern status_t remove_vnode(mount_id mountID, vnode_id vnodeID);
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extern status_t unremove_vnode(mount_id mountID, vnode_id vnodeID);
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extern status_t notify_listener(int op, mount_id device, vnode_id parentNode,
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vnode_id toParentNode, vnode_id node, const char *name);
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extern status_t send_notification(port_id port, long token, ulong what, long op,
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mount_id device, mount_id toDevice, vnode_id parentNode,
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vnode_id toParentNode, vnode_id node, const char *name);
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extern status_t notify_entry_created(mount_id device, vnode_id directory,
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const char *name, vnode_id node);
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extern status_t notify_entry_removed(mount_id device, vnode_id directory,
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const char *name, vnode_id node);
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extern status_t notify_entry_moved(mount_id device, vnode_id fromDirectory,
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const char *fromName, vnode_id toDirectory,
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const char *toName, vnode_id node);
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extern status_t notify_stat_changed(mount_id device, vnode_id node,
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uint32 statFields);
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extern status_t notify_attribute_changed(mount_id device, vnode_id node,
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const char *attribute, int32 cause);
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extern status_t notify_query_entry_created(port_id port, int32 token,
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mount_id device, vnode_id directory, const char *name,
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vnode_id node);
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extern status_t notify_query_entry_removed(port_id port, int32 token,
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mount_id device, vnode_id directory, const char *name,
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vnode_id node);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FS_INTERFACE_H */
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