![Miklos Szeredi](/assets/img/avatar_default.png)
Add a new access call, which will only be called if ->permission is invoked from sys_access(). In all other cases permission checking is delayed until the actual filesystem operation. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
265 lines
4.5 KiB
C
265 lines
4.5 KiB
C
/*
|
|
FUSE: Filesystem in Userspace
|
|
Copyright (C) 2001-2005 Miklos Szeredi <miklos@szeredi.hu>
|
|
|
|
This program can be distributed under the terms of the GNU GPL.
|
|
See the file COPYING.
|
|
*/
|
|
|
|
/* This file defines the kernel interface of FUSE */
|
|
|
|
#include <asm/types.h>
|
|
|
|
/** Version number of this interface */
|
|
#define FUSE_KERNEL_VERSION 7
|
|
|
|
/** Minor version number of this interface */
|
|
#define FUSE_KERNEL_MINOR_VERSION 3
|
|
|
|
/** The node ID of the root inode */
|
|
#define FUSE_ROOT_ID 1
|
|
|
|
/** The major number of the fuse character device */
|
|
#define FUSE_MAJOR 10
|
|
|
|
/** The minor number of the fuse character device */
|
|
#define FUSE_MINOR 229
|
|
|
|
/* Make sure all structures are padded to 64bit boundary, so 32bit
|
|
userspace works under 64bit kernels */
|
|
|
|
struct fuse_attr {
|
|
__u64 ino;
|
|
__u64 size;
|
|
__u64 blocks;
|
|
__u64 atime;
|
|
__u64 mtime;
|
|
__u64 ctime;
|
|
__u32 atimensec;
|
|
__u32 mtimensec;
|
|
__u32 ctimensec;
|
|
__u32 mode;
|
|
__u32 nlink;
|
|
__u32 uid;
|
|
__u32 gid;
|
|
__u32 rdev;
|
|
};
|
|
|
|
struct fuse_kstatfs {
|
|
__u64 blocks;
|
|
__u64 bfree;
|
|
__u64 bavail;
|
|
__u64 files;
|
|
__u64 ffree;
|
|
__u32 bsize;
|
|
__u32 namelen;
|
|
};
|
|
|
|
#define FATTR_MODE (1 << 0)
|
|
#define FATTR_UID (1 << 1)
|
|
#define FATTR_GID (1 << 2)
|
|
#define FATTR_SIZE (1 << 3)
|
|
#define FATTR_ATIME (1 << 4)
|
|
#define FATTR_MTIME (1 << 5)
|
|
|
|
/**
|
|
* Flags returned by the OPEN request
|
|
*
|
|
* FOPEN_DIRECT_IO: bypass page cache for this open file
|
|
* FOPEN_KEEP_CACHE: don't invalidate the data cache on open
|
|
*/
|
|
#define FOPEN_DIRECT_IO (1 << 0)
|
|
#define FOPEN_KEEP_CACHE (1 << 1)
|
|
|
|
enum fuse_opcode {
|
|
FUSE_LOOKUP = 1,
|
|
FUSE_FORGET = 2, /* no reply */
|
|
FUSE_GETATTR = 3,
|
|
FUSE_SETATTR = 4,
|
|
FUSE_READLINK = 5,
|
|
FUSE_SYMLINK = 6,
|
|
FUSE_MKNOD = 8,
|
|
FUSE_MKDIR = 9,
|
|
FUSE_UNLINK = 10,
|
|
FUSE_RMDIR = 11,
|
|
FUSE_RENAME = 12,
|
|
FUSE_LINK = 13,
|
|
FUSE_OPEN = 14,
|
|
FUSE_READ = 15,
|
|
FUSE_WRITE = 16,
|
|
FUSE_STATFS = 17,
|
|
FUSE_RELEASE = 18,
|
|
FUSE_FSYNC = 20,
|
|
FUSE_SETXATTR = 21,
|
|
FUSE_GETXATTR = 22,
|
|
FUSE_LISTXATTR = 23,
|
|
FUSE_REMOVEXATTR = 24,
|
|
FUSE_FLUSH = 25,
|
|
FUSE_INIT = 26,
|
|
FUSE_OPENDIR = 27,
|
|
FUSE_READDIR = 28,
|
|
FUSE_RELEASEDIR = 29,
|
|
FUSE_FSYNCDIR = 30,
|
|
FUSE_ACCESS = 34
|
|
};
|
|
|
|
/* Conservative buffer size for the client */
|
|
#define FUSE_MAX_IN 8192
|
|
|
|
#define FUSE_NAME_MAX 1024
|
|
#define FUSE_SYMLINK_MAX 4096
|
|
#define FUSE_XATTR_SIZE_MAX 4096
|
|
|
|
struct fuse_entry_out {
|
|
__u64 nodeid; /* Inode ID */
|
|
__u64 generation; /* Inode generation: nodeid:gen must
|
|
be unique for the fs's lifetime */
|
|
__u64 entry_valid; /* Cache timeout for the name */
|
|
__u64 attr_valid; /* Cache timeout for the attributes */
|
|
__u32 entry_valid_nsec;
|
|
__u32 attr_valid_nsec;
|
|
struct fuse_attr attr;
|
|
};
|
|
|
|
struct fuse_forget_in {
|
|
__u64 nlookup;
|
|
};
|
|
|
|
struct fuse_attr_out {
|
|
__u64 attr_valid; /* Cache timeout for the attributes */
|
|
__u32 attr_valid_nsec;
|
|
__u32 dummy;
|
|
struct fuse_attr attr;
|
|
};
|
|
|
|
struct fuse_mknod_in {
|
|
__u32 mode;
|
|
__u32 rdev;
|
|
};
|
|
|
|
struct fuse_mkdir_in {
|
|
__u32 mode;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_rename_in {
|
|
__u64 newdir;
|
|
};
|
|
|
|
struct fuse_link_in {
|
|
__u64 oldnodeid;
|
|
};
|
|
|
|
struct fuse_setattr_in {
|
|
__u32 valid;
|
|
__u32 padding;
|
|
struct fuse_attr attr;
|
|
};
|
|
|
|
struct fuse_open_in {
|
|
__u32 flags;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_open_out {
|
|
__u64 fh;
|
|
__u32 open_flags;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_release_in {
|
|
__u64 fh;
|
|
__u32 flags;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_flush_in {
|
|
__u64 fh;
|
|
__u32 flush_flags;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_read_in {
|
|
__u64 fh;
|
|
__u64 offset;
|
|
__u32 size;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_write_in {
|
|
__u64 fh;
|
|
__u64 offset;
|
|
__u32 size;
|
|
__u32 write_flags;
|
|
};
|
|
|
|
struct fuse_write_out {
|
|
__u32 size;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_statfs_out {
|
|
struct fuse_kstatfs st;
|
|
};
|
|
|
|
struct fuse_fsync_in {
|
|
__u64 fh;
|
|
__u32 fsync_flags;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_setxattr_in {
|
|
__u32 size;
|
|
__u32 flags;
|
|
};
|
|
|
|
struct fuse_getxattr_in {
|
|
__u32 size;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_getxattr_out {
|
|
__u32 size;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_access_in {
|
|
__u32 mask;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_init_in_out {
|
|
__u32 major;
|
|
__u32 minor;
|
|
};
|
|
|
|
struct fuse_in_header {
|
|
__u32 len;
|
|
__u32 opcode;
|
|
__u64 unique;
|
|
__u64 nodeid;
|
|
__u32 uid;
|
|
__u32 gid;
|
|
__u32 pid;
|
|
__u32 padding;
|
|
};
|
|
|
|
struct fuse_out_header {
|
|
__u32 len;
|
|
__s32 error;
|
|
__u64 unique;
|
|
};
|
|
|
|
struct fuse_dirent {
|
|
__u64 ino;
|
|
__u64 off;
|
|
__u32 namelen;
|
|
__u32 type;
|
|
char name[0];
|
|
};
|
|
|
|
#define FUSE_NAME_OFFSET ((unsigned) ((struct fuse_dirent *) 0)->name)
|
|
#define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
|
|
#define FUSE_DIRENT_SIZE(d) \
|
|
FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
|