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+/*
+ FUSE: Filesystem in Userspace
+ Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
+
+ This program can be distributed under the terms of the GNU LGPLv2.
+ See the file COPYING.LIB.
+*/
+
+#ifndef _FUSE_H_
+#define _FUSE_H_
+
+/** @file
+ *
+ * This file defines the library interface of FUSE
+ *
+ * IMPORTANT: you should define FUSE_USE_VERSION before including this
+ * header. To use the newest API define it to 26 (recommended for any
+ * new application), to use the old API define it to 21 (default) 22
+ * or 25, to use the even older 1.X API define it to 11.
+ */
+
+#ifndef FUSE_USE_VERSION
+#define FUSE_USE_VERSION 28
+#endif
+
+#include "fuse_common.h"
+
+#include <fcntl.h>
+#include <time.h>
+#include <utime.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/statvfs.h>
+#include <sys/uio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* ----------------------------------------------------------- *
+ * Basic FUSE API *
+ * ----------------------------------------------------------- */
+
+/** Handle for a FUSE filesystem */
+struct fuse;
+
+/** Structure containing a raw command */
+struct fuse_cmd;
+
+/** Function to add an entry in a readdir() operation
+ *
+ * @param buf the buffer passed to the readdir() operation
+ * @param name the file name of the directory entry
+ * @param stat file attributes, can be NULL
+ * @param off offset of the next entry or zero
+ * @return 1 if buffer is full, zero otherwise
+ */
+typedef int (*fuse_fill_dir_t) (void *buf, const char *name,
+ const struct stat *stbuf, off64_t off);
+
+/* Used by deprecated getdir() method */
+typedef struct fuse_dirhandle *fuse_dirh_t;
+typedef int (*fuse_dirfil_t) (fuse_dirh_t h, const char *name, int type,
+ ino_t ino);
+
+/**
+ * The file system operations:
+ *
+ * Most of these should work very similarly to the well known UNIX
+ * file system operations. A major exception is that instead of
+ * returning an error in 'errno', the operation should return the
+ * negated error value (-errno) directly.
+ *
+ * All methods are optional, but some are essential for a useful
+ * filesystem (e.g. getattr). Open, flush, release, fsync, opendir,
+ * releasedir, fsyncdir, access, create, ftruncate, fgetattr, lock,
+ * init and destroy are special purpose methods, without which a full
+ * featured filesystem can still be implemented.
+ *
+ * Almost all operations take a path which can be of any length.
+ *
+ * Changed in fuse 2.8.0 (regardless of API version)
+ * Previously, paths were limited to a length of PATH_MAX.
+ *
+ * See http://fuse.sourceforge.net/wiki/ for more information. There
+ * is also a snapshot of the relevant wiki pages in the doc/ folder.
+ */
+struct fuse_operations {
+ /** Get file attributes.
+ *
+ * Similar to stat(). The 'st_dev' and 'st_blksize' fields are
+ * ignored. The 'st_ino' field is ignored except if the 'use_ino'
+ * mount option is given.
+ */
+ int (*getattr) (const char *, struct stat *);
+
+ /** Read the target of a symbolic link
+ *
+ * The buffer should be filled with a null terminated string. The
+ * buffer size argument includes the space for the terminating
+ * null character. If the linkname is too long to fit in the
+ * buffer, it should be truncated. The return value should be 0
+ * for success.
+ */
+ int (*readlink) (const char *, char *, size_t);
+
+ /* Deprecated, use readdir() instead */
+ int (*getdir) (const char *, fuse_dirh_t, fuse_dirfil_t);
+
+ /** Create a file node
+ *
+ * This is called for creation of all non-directory, non-symlink
+ * nodes. If the filesystem defines a create() method, then for
+ * regular files that will be called instead.
+ */
+ int (*mknod) (const char *, mode_t, dev_t);
+
+ /** Create a directory
+ *
+ * Note that the mode argument may not have the type specification
+ * bits set, i.e. S_ISDIR(mode) can be false. To obtain the
+ * correct directory type bits use mode|S_IFDIR
+ * */
+ int (*mkdir) (const char *, mode_t);
+
+ /** Remove a file */
+ int (*unlink) (const char *);
+
+ /** Remove a directory */
+ int (*rmdir) (const char *);
+
+ /** Create a symbolic link */
+ int (*symlink) (const char *, const char *);
+
+ /** Rename a file */
+ int (*rename) (const char *, const char *);
+
+ /** Create a hard link to a file */
+ int (*link) (const char *, const char *);
+
+ /** Change the permission bits of a file */
+ int (*chmod) (const char *, mode_t);
+
+ /** Change the owner and group of a file */
+ int (*chown) (const char *, uid_t, gid_t);
+
+ /** Change the size of a file */
+ int (*truncate) (const char *, off64_t);
+
+ /** Change the access and/or modification times of a file
+ *
+ * Deprecated, use utimens() instead.
+ */
+ int (*utime) (const char *, struct utimbuf *);
+
+ /** File open operation
+ *
+ * No creation (O_CREAT, O_EXCL) and by default also no
+ * truncation (O_TRUNC) flags will be passed to open(). If an
+ * application specifies O_TRUNC, fuse first calls truncate()
+ * and then open(). Only if 'atomic_o_trunc' has been
+ * specified and kernel version is 2.6.24 or later, O_TRUNC is
+ * passed on to open.
+ *
+ * Unless the 'default_permissions' mount option is given,
+ * open should check if the operation is permitted for the
+ * given flags. Optionally open may also return an arbitrary
+ * filehandle in the fuse_file_info structure, which will be
+ * passed to all file operations.
+ *
+ * Changed in version 2.2
+ */
+ int (*open) (const char *, struct fuse_file_info *);
+
+ /** Read data from an open file
+ *
+ * Read should return exactly the number of bytes requested except
+ * on EOF or error, otherwise the rest of the data will be
+ * substituted with zeroes. An exception to this is when the
+ * 'direct_io' mount option is specified, in which case the return
+ * value of the read system call will reflect the return value of
+ * this operation.
+ *
+ * Changed in version 2.2
+ */
+ int (*read) (const char *, char *, size_t, off64_t,
+ struct fuse_file_info *);
+
+ /** Write data to an open file
+ *
+ * Write should return exactly the number of bytes requested
+ * except on error. An exception to this is when the 'direct_io'
+ * mount option is specified (see read operation).
+ *
+ * Changed in version 2.2
+ */
+ int (*write) (const char *, const char *, size_t, off64_t,
+ struct fuse_file_info *);
+
+ /** Get file system statistics
+ *
+ * The 'f_frsize', 'f_favail', 'f_fsid' and 'f_flag' fields are ignored
+ *
+ * Replaced 'struct statfs' parameter with 'struct statvfs' in
+ * version 2.5
+ */
+ int (*statfs) (const char *, struct statvfs *);
+
+ /** Possibly flush cached data
+ *
+ * BIG NOTE: This is not equivalent to fsync(). It's not a
+ * request to sync dirty data.
+ *
+ * Flush is called on each close() of a file descriptor. So if a
+ * filesystem wants to return write errors in close() and the file
+ * has cached dirty data, this is a good place to write back data
+ * and return any errors. Since many applications ignore close()
+ * errors this is not always useful.
+ *
+ * NOTE: The flush() method may be called more than once for each
+ * open(). This happens if more than one file descriptor refers
+ * to an opened file due to dup(), dup2() or fork() calls. It is
+ * not possible to determine if a flush is final, so each flush
+ * should be treated equally. Multiple write-flush sequences are
+ * relatively rare, so this shouldn't be a problem.
+ *
+ * Filesystems shouldn't assume that flush will always be called
+ * after some writes, or that if will be called at all.
+ *
+ * Changed in version 2.2
+ */
+ int (*flush) (const char *, struct fuse_file_info *);
+
+ /** Release an open file
+ *
+ * Release is called when there are no more references to an open
+ * file: all file descriptors are closed and all memory mappings
+ * are unmapped.
+ *
+ * For every open() call there will be exactly one release() call
+ * with the same flags and file descriptor. It is possible to
+ * have a file opened more than once, in which case only the last
+ * release will mean, that no more reads/writes will happen on the
+ * file. The return value of release is ignored.
+ *
+ * Changed in version 2.2
+ */
+ int (*release) (const char *, struct fuse_file_info *);
+
+ /** Synchronize file contents
+ *
+ * If the datasync parameter is non-zero, then only the user data
+ * should be flushed, not the meta data.
+ *
+ * Changed in version 2.2
+ */
+ int (*fsync) (const char *, int, struct fuse_file_info *);
+
+ /** Set extended attributes */
+ int (*setxattr) (const char *, const char *, const char *, size_t, int);
+
+ /** Get extended attributes */
+ int (*getxattr) (const char *, const char *, char *, size_t);
+
+ /** List extended attributes */
+ int (*listxattr) (const char *, char *, size_t);
+
+ /** Remove extended attributes */
+ int (*removexattr) (const char *, const char *);
+
+ /** Open directory
+ *
+ * Unless the 'default_permissions' mount option is given,
+ * this method should check if opendir is permitted for this
+ * directory. Optionally opendir may also return an arbitrary
+ * filehandle in the fuse_file_info structure, which will be
+ * passed to readdir, closedir and fsyncdir.
+ *
+ * Introduced in version 2.3
+ */
+ int (*opendir) (const char *, struct fuse_file_info *);
+
+ /** Read directory
+ *
+ * This supersedes the old getdir() interface. New applications
+ * should use this.
+ *
+ * The filesystem may choose between two modes of operation:
+ *
+ * 1) The readdir implementation ignores the offset parameter, and
+ * passes zero to the filler function's offset. The filler
+ * function will not return '1' (unless an error happens), so the
+ * whole directory is read in a single readdir operation. This
+ * works just like the old getdir() method.
+ *
+ * 2) The readdir implementation keeps track of the offsets of the
+ * directory entries. It uses the offset parameter and always
+ * passes non-zero offset to the filler function. When the buffer
+ * is full (or an error happens) the filler function will return
+ * '1'.
+ *
+ * Introduced in version 2.3
+ */
+ int (*readdir) (const char *, void *, fuse_fill_dir_t, off64_t,
+ struct fuse_file_info *);
+
+ /** Release directory
+ *
+ * Introduced in version 2.3
+ */
+ int (*releasedir) (const char *, struct fuse_file_info *);
+
+ /** Synchronize directory contents
+ *
+ * If the datasync parameter is non-zero, then only the user data
+ * should be flushed, not the meta data
+ *
+ * Introduced in version 2.3
+ */
+ int (*fsyncdir) (const char *, int, struct fuse_file_info *);
+
+ /**
+ * Initialize filesystem
+ *
+ * The return value will passed in the private_data field of
+ * fuse_context to all file operations and as a parameter to the
+ * destroy() method.
+ *
+ * Introduced in version 2.3
+ * Changed in version 2.6
+ */
+ void *(*init) (struct fuse_conn_info *conn);
+
+ /**
+ * Clean up filesystem
+ *
+ * Called on filesystem exit.
+ *
+ * Introduced in version 2.3
+ */
+ void (*destroy) (void *);
+
+ /**
+ * Check file access permissions
+ *
+ * This will be called for the access() system call. If the
+ * 'default_permissions' mount option is given, this method is not
+ * called.
+ *
+ * This method is not called under Linux kernel versions 2.4.x
+ *
+ * Introduced in version 2.5
+ */
+ int (*access) (const char *, int);
+
+ /**
+ * Create and open a file
+ *
+ * If the file does not exist, first create it with the specified
+ * mode, and then open it.
+ *
+ * If this method is not implemented or under Linux kernel
+ * versions earlier than 2.6.15, the mknod() and open() methods
+ * will be called instead.
+ *
+ * Introduced in version 2.5
+ */
+ int (*create) (const char *, mode_t, struct fuse_file_info *);
+
+ /**
+ * Change the size of an open file
+ *
+ * This method is called instead of the truncate() method if the
+ * truncation was invoked from an ftruncate() system call.
+ *
+ * If this method is not implemented or under Linux kernel
+ * versions earlier than 2.6.15, the truncate() method will be
+ * called instead.
+ *
+ * Introduced in version 2.5
+ */
+ int (*ftruncate) (const char *, off64_t, struct fuse_file_info *);
+
+ /**
+ * Get attributes from an open file
+ *
+ * This method is called instead of the getattr() method if the
+ * file information is available.
+ *
+ * Currently this is only called after the create() method if that
+ * is implemented (see above). Later it may be called for
+ * invocations of fstat() too.
+ *
+ * Introduced in version 2.5
+ */
+ int (*fgetattr) (const char *, struct stat *, struct fuse_file_info *);
+
+ /**
+ * Perform POSIX file locking operation
+ *
+ * The cmd argument will be either F_GETLK, F_SETLK or F_SETLKW.
+ *
+ * For the meaning of fields in 'struct flock' see the man page
+ * for fcntl(2). The l_whence field will always be set to
+ * SEEK_SET.
+ *
+ * For checking lock ownership, the 'fuse_file_info->owner'
+ * argument must be used.
+ *
+ * For F_GETLK operation, the library will first check currently
+ * held locks, and if a conflicting lock is found it will return
+ * information without calling this method. This ensures, that
+ * for local locks the l_pid field is correctly filled in. The
+ * results may not be accurate in case of race conditions and in
+ * the presence of hard links, but it's unlikly that an
+ * application would rely on accurate GETLK results in these
+ * cases. If a conflicting lock is not found, this method will be
+ * called, and the filesystem may fill out l_pid by a meaningful
+ * value, or it may leave this field zero.
+ *
+ * For F_SETLK and F_SETLKW the l_pid field will be set to the pid
+ * of the process performing the locking operation.
+ *
+ * Note: if this method is not implemented, the kernel will still
+ * allow file locking to work locally. Hence it is only
+ * interesting for network filesystems and similar.
+ *
+ * Introduced in version 2.6
+ */
+ int (*lock) (const char *, struct fuse_file_info *, int cmd,
+ struct flock *);
+
+ /**
+ * Change the access and modification times of a file with
+ * nanosecond resolution
+ *
+ * Introduced in version 2.6
+ */
+ int (*utimens) (const char *, const struct timespec tv[2]);
+
+ /**
+ * Map block index within file to block index within device
+ *
+ * Note: This makes sense only for block device backed filesystems
+ * mounted with the 'blkdev' option
+ *
+ * Introduced in version 2.6
+ */
+ int (*bmap) (const char *, size_t blocksize, uint64_t *idx);
+
+ /**
+ * Flag indicating, that the filesystem can accept a NULL path
+ * as the first argument for the following operations:
+ *
+ * read, write, flush, release, fsync, readdir, releasedir,
+ * fsyncdir, ftruncate, fgetattr and lock
+ */
+ unsigned int flag_nullpath_ok : 1;
+
+ /**
+ * Reserved flags, don't set
+ */
+ unsigned int flag_reserved : 31;
+
+ /**
+ * Ioctl
+ *
+ * flags will have FUSE_IOCTL_COMPAT set for 32bit ioctls in
+ * 64bit environment. The size and direction of data is
+ * determined by _IOC_*() decoding of cmd. For _IOC_NONE,
+ * data will be NULL, for _IOC_WRITE data is out area, for
+ * _IOC_READ in area and if both are set in/out area. In all
+ * non-NULL cases, the area is of _IOC_SIZE(cmd) bytes.
+ *
+ * Introduced in version 2.8
+ */
+ int (*ioctl) (const char *, int cmd, void *arg,
+ struct fuse_file_info *, unsigned int flags, void *data);
+
+ /**
+ * Poll for IO readiness events
+ *
+ * Note: If ph is non-NULL, the client should notify
+ * when IO readiness events occur by calling
+ * fuse_notify_poll() with the specified ph.
+ *
+ * Regardless of the number of times poll with a non-NULL ph
+ * is received, single notification is enough to clear all.
+ * Notifying more times incurs overhead but doesn't harm
+ * correctness.
+ *
+ * The callee is responsible for destroying ph with
+ * fuse_pollhandle_destroy() when no longer in use.
+ *
+ * Introduced in version 2.8
+ */
+ int (*poll) (const char *, struct fuse_file_info *,
+ struct fuse_pollhandle *ph, unsigned *reventsp);
+};
+
+/** Extra context that may be needed by some filesystems
+ *
+ * The uid, gid and pid fields are not filled in case of a writepage
+ * operation.
+ */
+struct fuse_context {
+ /** Pointer to the fuse object */
+ struct fuse *fuse;
+
+ /** User ID of the calling process */
+ uid_t uid;
+
+ /** Group ID of the calling process */
+ gid_t gid;
+
+ /** Thread ID of the calling process */
+ pid_t pid;
+
+ /** Private filesystem data */
+ void *private_data;
+
+ /** Umask of the calling process (introduced in version 2.8) */
+ mode_t umask;
+};
+
+/**
+ * Main function of FUSE.
+ *
+ * This is for the lazy. This is all that has to be called from the
+ * main() function.
+ *
+ * This function does the following:
+ * - parses command line options (-d -s and -h)
+ * - passes relevant mount options to the fuse_mount()
+ * - installs signal handlers for INT, HUP, TERM and PIPE
+ * - registers an exit handler to unmount the filesystem on program exit
+ * - creates a fuse handle
+ * - registers the operations
+ * - calls either the single-threaded or the multi-threaded event loop
+ *
+ * Note: this is currently implemented as a macro.
+ *
+ * @param argc the argument counter passed to the main() function
+ * @param argv the argument vector passed to the main() function
+ * @param op the file system operation
+ * @param user_data user data supplied in the context during the init() method
+ * @return 0 on success, nonzero on failure
+ */
+/*
+ int fuse_main(int argc, char *argv[], const struct fuse_operations *op,
+ void *user_data);
+*/
+#define fuse_main(argc, argv, op, user_data) \
+ fuse_main_real(argc, argv, op, sizeof(*(op)), user_data)
+
+/* ----------------------------------------------------------- *
+ * More detailed API *
+ * ----------------------------------------------------------- */
+
+/**
+ * Create a new FUSE filesystem.
+ *
+ * @param ch the communication channel
+ * @param args argument vector
+ * @param op the filesystem operations
+ * @param op_size the size of the fuse_operations structure
+ * @param user_data user data supplied in the context during the init() method
+ * @return the created FUSE handle
+ */
+struct fuse *fuse_new(struct fuse_chan *ch, struct fuse_args *args,
+ const struct fuse_operations *op, size_t op_size,
+ void *user_data);
+
+/**
+ * Destroy the FUSE handle.
+ *
+ * The communication channel attached to the handle is also destroyed.
+ *
+ * NOTE: This function does not unmount the filesystem. If this is
+ * needed, call fuse_unmount() before calling this function.
+ *
+ * @param f the FUSE handle
+ */
+void fuse_destroy(struct fuse *f);
+
+/**
+ * FUSE event loop.
+ *
+ * Requests from the kernel are processed, and the appropriate
+ * operations are called.
+ *
+ * @param f the FUSE handle
+ * @return 0 if no error occurred, -1 otherwise
+ */
+int fuse_loop(struct fuse *f);
+
+/**
+ * Exit from event loop
+ *
+ * @param f the FUSE handle
+ */
+void fuse_exit(struct fuse *f);
+
+/**
+ * FUSE event loop with multiple threads
+ *
+ * Requests from the kernel are processed, and the appropriate
+ * operations are called. Request are processed in parallel by
+ * distributing them between multiple threads.
+ *
+ * Calling this function requires the pthreads library to be linked to
+ * the application.
+ *
+ * @param f the FUSE handle
+ * @return 0 if no error occurred, -1 otherwise
+ */
+int fuse_loop_mt(struct fuse *f);
+
+/**
+ * Get the current context
+ *
+ * The context is only valid for the duration of a filesystem
+ * operation, and thus must not be stored and used later.
+ *
+ * @return the context
+ */
+struct fuse_context *fuse_get_context(void);
+
+/**
+ * Get the current supplementary group IDs for the current request
+ *
+ * Similar to the getgroups(2) system call, except the return value is
+ * always the total number of group IDs, even if it is larger than the
+ * specified size.
+ *
+ * The current fuse kernel module in linux (as of 2.6.30) doesn't pass
+ * the group list to userspace, hence this function needs to parse
+ * "/proc/$TID/task/$TID/status" to get the group IDs.
+ *
+ * This feature may not be supported on all operating systems. In
+ * such a case this function will return -ENOSYS.
+ *
+ * @param size size of given array
+ * @param list array of group IDs to be filled in
+ * @return the total number of supplementary group IDs or -errno on failure
+ */
+int fuse_getgroups(int size, gid_t list[]);
+
+/**
+ * Check if the current request has already been interrupted
+ *
+ * @return 1 if the request has been interrupted, 0 otherwise
+ */
+int fuse_interrupted(void);
+
+/**
+ * Obsolete, doesn't do anything
+ *
+ * @return -EINVAL
+ */
+int fuse_invalidate(struct fuse *f, const char *path);
+
+/* Deprecated, don't use */
+int fuse_is_lib_option(const char *opt);
+
+/**
+ * The real main function
+ *
+ * Do not call this directly, use fuse_main()
+ */
+int fuse_main_real(int argc, char *argv[], const struct fuse_operations *op,
+ size_t op_size, void *user_data);
+
+/*
+ * Stacking API
+ */
+
+/**
+ * Fuse filesystem object
+ *
+ * This is opaque object represents a filesystem layer
+ */
+struct fuse_fs;
+
+/*
+ * These functions call the relevant filesystem operation, and return
+ * the result.
+ *
+ * If the operation is not defined, they return -ENOSYS, with the
+ * exception of fuse_fs_open, fuse_fs_release, fuse_fs_opendir,
+ * fuse_fs_releasedir and fuse_fs_statfs, which return 0.
+ */
+
+int fuse_fs_getattr(struct fuse_fs *fs, const char *path, struct stat *buf);
+int fuse_fs_fgetattr(struct fuse_fs *fs, const char *path, struct stat *buf,
+ struct fuse_file_info *fi);
+int fuse_fs_rename(struct fuse_fs *fs, const char *oldpath,
+ const char *newpath);
+int fuse_fs_unlink(struct fuse_fs *fs, const char *path);
+int fuse_fs_rmdir(struct fuse_fs *fs, const char *path);
+int fuse_fs_symlink(struct fuse_fs *fs, const char *linkname,
+ const char *path);
+int fuse_fs_link(struct fuse_fs *fs, const char *oldpath, const char *newpath);
+int fuse_fs_release(struct fuse_fs *fs, const char *path,
+ struct fuse_file_info *fi);
+int fuse_fs_open(struct fuse_fs *fs, const char *path,
+ struct fuse_file_info *fi);
+int fuse_fs_read(struct fuse_fs *fs, const char *path, char *buf, size_t size,
+ off64_t off, struct fuse_file_info *fi);
+int fuse_fs_write(struct fuse_fs *fs, const char *path, const char *buf,
+ size_t size, off64_t off, struct fuse_file_info *fi);
+int fuse_fs_fsync(struct fuse_fs *fs, const char *path, int datasync,
+ struct fuse_file_info *fi);
+int fuse_fs_flush(struct fuse_fs *fs, const char *path,
+ struct fuse_file_info *fi);
+int fuse_fs_statfs(struct fuse_fs *fs, const char *path, struct statvfs *buf);
+int fuse_fs_opendir(struct fuse_fs *fs, const char *path,
+ struct fuse_file_info *fi);
+int fuse_fs_readdir(struct fuse_fs *fs, const char *path, void *buf,
+ fuse_fill_dir_t filler, off64_t off,
+ struct fuse_file_info *fi);
+int fuse_fs_fsyncdir(struct fuse_fs *fs, const char *path, int datasync,
+ struct fuse_file_info *fi);
+int fuse_fs_releasedir(struct fuse_fs *fs, const char *path,
+ struct fuse_file_info *fi);
+int fuse_fs_create(struct fuse_fs *fs, const char *path, mode_t mode,
+ struct fuse_file_info *fi);
+int fuse_fs_lock(struct fuse_fs *fs, const char *path,
+ struct fuse_file_info *fi, int cmd, struct flock *lock);
+int fuse_fs_chmod(struct fuse_fs *fs, const char *path, mode_t mode);
+int fuse_fs_chown(struct fuse_fs *fs, const char *path, uid_t uid, gid_t gid);
+int fuse_fs_truncate(struct fuse_fs *fs, const char *path, off64_t size);
+int fuse_fs_ftruncate(struct fuse_fs *fs, const char *path, off64_t size,
+ struct fuse_file_info *fi);
+int fuse_fs_utimens(struct fuse_fs *fs, const char *path,
+ const struct timespec tv[2]);
+int fuse_fs_access(struct fuse_fs *fs, const char *path, int mask);
+int fuse_fs_readlink(struct fuse_fs *fs, const char *path, char *buf,
+ size_t len);
+int fuse_fs_mknod(struct fuse_fs *fs, const char *path, mode_t mode,
+ dev_t rdev);
+int fuse_fs_mkdir(struct fuse_fs *fs, const char *path, mode_t mode);
+int fuse_fs_setxattr(struct fuse_fs *fs, const char *path, const char *name,
+ const char *value, size_t size, int flags);
+int fuse_fs_getxattr(struct fuse_fs *fs, const char *path, const char *name,
+ char *value, size_t size);
+int fuse_fs_listxattr(struct fuse_fs *fs, const char *path, char *list,
+ size_t size);
+int fuse_fs_removexattr(struct fuse_fs *fs, const char *path,
+ const char *name);
+int fuse_fs_bmap(struct fuse_fs *fs, const char *path, size_t blocksize,
+ uint64_t *idx);
+int fuse_fs_ioctl(struct fuse_fs *fs, const char *path, int cmd, void *arg,
+ struct fuse_file_info *fi, unsigned int flags, void *data);
+int fuse_fs_poll(struct fuse_fs *fs, const char *path,
+ struct fuse_file_info *fi, struct fuse_pollhandle *ph,
+ unsigned *reventsp);
+void fuse_fs_init(struct fuse_fs *fs, struct fuse_conn_info *conn);
+void fuse_fs_destroy(struct fuse_fs *fs);
+
+int fuse_notify_poll(struct fuse_pollhandle *ph);
+
+/**
+ * Create a new fuse filesystem object
+ *
+ * This is usually called from the factory of a fuse module to create
+ * a new instance of a filesystem.
+ *
+ * @param op the filesystem operations
+ * @param op_size the size of the fuse_operations structure
+ * @param user_data user data supplied in the context during the init() method
+ * @return a new filesystem object
+ */
+struct fuse_fs *fuse_fs_new(const struct fuse_operations *op, size_t op_size,
+ void *user_data);
+
+/**
+ * Filesystem module
+ *
+ * Filesystem modules are registered with the FUSE_REGISTER_MODULE()
+ * macro.
+ *
+ * If the "-omodules=modname:..." option is present, filesystem
+ * objects are created and pushed onto the stack with the 'factory'
+ * function.
+ */
+struct fuse_module {
+ /**
+ * Name of filesystem
+ */
+ const char *name;
+
+ /**
+ * Factory for creating filesystem objects
+ *
+ * The function may use and remove options from 'args' that belong
+ * to this module.
+ *
+ * For now the 'fs' vector always contains exactly one filesystem.
+ * This is the filesystem which will be below the newly created
+ * filesystem in the stack.
+ *
+ * @param args the command line arguments
+ * @param fs NULL terminated filesystem object vector
+ * @return the new filesystem object
+ */
+ struct fuse_fs *(*factory)(struct fuse_args *args,
+ struct fuse_fs *fs[]);
+
+ struct fuse_module *next;
+ struct fusemod_so *so;
+ int ctr;
+};
+
+/**
+ * Register a filesystem module
+ *
+ * This function is used by FUSE_REGISTER_MODULE and there's usually
+ * no need to call it directly
+ */
+void fuse_register_module(struct fuse_module *mod);
+
+/**
+ * Register filesystem module
+ *
+ * For the parameters, see description of the fields in 'struct
+ * fuse_module'
+ */
+#define FUSE_REGISTER_MODULE(name_, factory_) \
+ static __attribute__((constructor)) void name_ ## _register(void) \
+ { \
+ static struct fuse_module mod = \
+ { #name_, factory_, NULL, NULL, 0 }; \
+ fuse_register_module(&mod); \
+ }
+
+
+/* ----------------------------------------------------------- *
+ * Advanced API for event handling, don't worry about this... *
+ * ----------------------------------------------------------- */
+
+/* NOTE: the following functions are deprecated, and will be removed
+ from the 3.0 API. Use the lowlevel session functions instead */
+
+/** Function type used to process commands */
+typedef void (*fuse_processor_t)(struct fuse *, struct fuse_cmd *, void *);
+
+/** This is the part of fuse_main() before the event loop */
+struct fuse *fuse_setup(int argc, char *argv[],
+ const struct fuse_operations *op, size_t op_size,
+ char **mountpoint, int *multithreaded,
+ void *user_data);
+
+/** This is the part of fuse_main() after the event loop */
+void fuse_teardown(struct fuse *fuse, char *mountpoint);
+
+/** Read a single command. If none are read, return NULL */
+struct fuse_cmd *fuse_read_cmd(struct fuse *f);
+
+/** Process a single command */
+void fuse_process_cmd(struct fuse *f, struct fuse_cmd *cmd);
+
+/** Multi threaded event loop, which calls the custom command
+ processor function */
+int fuse_loop_mt_proc(struct fuse *f, fuse_processor_t proc, void *data);
+
+/** Return the exited flag, which indicates if fuse_exit() has been
+ called */
+int fuse_exited(struct fuse *f);
+
+/** This function is obsolete and implemented as a no-op */
+void fuse_set_getcontext_func(struct fuse_context *(*func)(void));
+
+/** Get session from fuse object */
+struct fuse_session *fuse_get_session(struct fuse *f);
+
+/* ----------------------------------------------------------- *
+ * Compatibility stuff *
+ * ----------------------------------------------------------- */
+
+#if FUSE_USE_VERSION < 26
+# include "fuse_compat.h"
+# undef fuse_main
+# if FUSE_USE_VERSION == 25
+# define fuse_main(argc, argv, op) \
+ fuse_main_real_compat25(argc, argv, op, sizeof(*(op)))
+# define fuse_new fuse_new_compat25
+# define fuse_setup fuse_setup_compat25
+# define fuse_teardown fuse_teardown_compat22
+# define fuse_operations fuse_operations_compat25
+# elif FUSE_USE_VERSION == 22
+# define fuse_main(argc, argv, op) \
+ fuse_main_real_compat22(argc, argv, op, sizeof(*(op)))
+# define fuse_new fuse_new_compat22
+# define fuse_setup fuse_setup_compat22
+# define fuse_teardown fuse_teardown_compat22
+# define fuse_operations fuse_operations_compat22
+# define fuse_file_info fuse_file_info_compat
+# elif FUSE_USE_VERSION == 24
+# error Compatibility with high-level API version 24 not supported
+# else
+# define fuse_dirfil_t fuse_dirfil_t_compat
+# define __fuse_read_cmd fuse_read_cmd
+# define __fuse_process_cmd fuse_process_cmd
+# define __fuse_loop_mt fuse_loop_mt_proc
+# if FUSE_USE_VERSION == 21
+# define fuse_operations fuse_operations_compat2
+# define fuse_main fuse_main_compat2
+# define fuse_new fuse_new_compat2
+# define __fuse_setup fuse_setup_compat2
+# define __fuse_teardown fuse_teardown_compat22
+# define __fuse_exited fuse_exited
+# define __fuse_set_getcontext_func fuse_set_getcontext_func
+# else
+# define fuse_statfs fuse_statfs_compat1
+# define fuse_operations fuse_operations_compat1
+# define fuse_main fuse_main_compat1
+# define fuse_new fuse_new_compat1
+# define FUSE_DEBUG FUSE_DEBUG_COMPAT1
+# endif
+# endif
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _FUSE_H_ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-20 06:54:24 +0100