425 lines
17 KiB
C
425 lines
17 KiB
C
/*
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* Copyright 2004-2016, 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, uint32_t 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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fssh_status_t (*preallocate)(fssh_fs_volume* volume, fssh_fs_vnode* vnode,
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fssh_off_t pos, fssh_off_t length);
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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);
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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_status_t (*uninitialize)(int fd, fssh_partition_id partition,
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fssh_off_t partitionSize, uint32_t blockSize,
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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_acquire_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_status_t fssh_mark_vnode_busy(fssh_fs_volume* volume,
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fssh_vnode_id vnodeID, bool busy);
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extern fssh_status_t fssh_change_vnode_id(fssh_fs_volume* volume,
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fssh_vnode_id vnodeID, fssh_vnode_id newID);
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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_check_access_permissions(int accessMode,
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fssh_mode_t mode, fssh_gid_t nodeGroupID,
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fssh_uid_t nodeUserID);
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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 dir, 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 dir, fssh_vnode_id node, const char *attribute,
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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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extern fssh_status_t fssh_notify_query_attr_changed(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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