![Miklos Szeredi](/assets/img/avatar_default.png)
Make the maximum size of write data configurable by the filesystem. The previous fixed 4096 limit only worked on architectures where the page size is less or equal to this. This change make writing work on other architectures too, and also lets the filesystem receive bigger write requests in direct_io mode. Normal writes which go through the page cache are still limited to a page sized chunk per request. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
288 lines
4.9 KiB
C
288 lines
4.9 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 5
|
|
|
|
/** 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;
|
|
__u32 frsize;
|
|
__u32 padding;
|
|
__u32 spare[6];
|
|
};
|
|
|
|
#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)
|
|
#define FATTR_FH (1 << 6)
|
|
|
|
/**
|
|
* 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,
|
|
FUSE_CREATE = 35
|
|
};
|
|
|
|
/* The read buffer is required to be at least 8k, but may be much larger */
|
|
#define FUSE_MIN_READ_BUFFER 8192
|
|
|
|
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;
|
|
__u64 fh;
|
|
__u64 size;
|
|
__u64 unused1;
|
|
__u64 atime;
|
|
__u64 mtime;
|
|
__u64 unused2;
|
|
__u32 atimensec;
|
|
__u32 mtimensec;
|
|
__u32 unused3;
|
|
__u32 mode;
|
|
__u32 unused4;
|
|
__u32 uid;
|
|
__u32 gid;
|
|
__u32 unused5;
|
|
};
|
|
|
|
struct fuse_open_in {
|
|
__u32 flags;
|
|
__u32 mode;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
#define FUSE_COMPAT_STATFS_SIZE 48
|
|
|
|
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 {
|
|
__u32 major;
|
|
__u32 minor;
|
|
};
|
|
|
|
struct fuse_init_out {
|
|
__u32 major;
|
|
__u32 minor;
|
|
__u32 unused[3];
|
|
__u32 max_write;
|
|
};
|
|
|
|
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)
|