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include/linux/fuse.h
11.8 KB
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/* FUSE: Filesystem in Userspace |
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Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu> |
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This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ |
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/* * This file defines the kernel interface of FUSE * * Protocol changelog: * * 7.9: * - new fuse_getattr_in input argument of GETATTR |
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* - add lk_flags in fuse_lk_in |
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* - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in |
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* - add blksize field to fuse_attr |
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* - add file flags field to fuse_read_in and fuse_write_in |
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* * 7.10 * - add nonseekable open flag |
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* * 7.11 * - add IOCTL message * - add unsolicited notification support * - add POLL message and NOTIFY_POLL notification |
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* * 7.12 * - add umask flag to input argument of open, mknod and mkdir |
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* - add notification messages for invalidation of inodes and * directory entries |
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* * 7.13 * - make max number of background requests and congestion threshold * tunables |
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* * 7.14 * - add splice support to fuse device |
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* * 7.15 * - add store notify |
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* - add retrieve notify |
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* * 7.16 * - add BATCH_FORGET request |
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* - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct * fuse_ioctl_iovec' instead of ambiguous 'struct iovec' * - add FUSE_IOCTL_32BIT flag |
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* * 7.17 * - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK |
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* * 7.18 * - add FUSE_IOCTL_DIR flag |
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* - add FUSE_NOTIFY_DELETE |
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*/ |
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#ifndef _LINUX_FUSE_H #define _LINUX_FUSE_H |
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#include <linux/types.h> |
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/* * Version negotiation: * * Both the kernel and userspace send the version they support in the * INIT request and reply respectively. * * If the major versions match then both shall use the smallest * of the two minor versions for communication. * * If the kernel supports a larger major version, then userspace shall * reply with the major version it supports, ignore the rest of the * INIT message and expect a new INIT message from the kernel with a * matching major version. * * If the library supports a larger major version, then it shall fall * back to the major protocol version sent by the kernel for * communication and reply with that major version (and an arbitrary * supported minor version). */ |
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/** Version number of this interface */ |
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#define FUSE_KERNEL_VERSION 7 |
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/** Minor version number of this interface */ |
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#define FUSE_KERNEL_MINOR_VERSION 18 |
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/** The node ID of the root inode */ #define FUSE_ROOT_ID 1 |
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/* Make sure all structures are padded to 64bit boundary, so 32bit userspace works under 64bit kernels */ |
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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; |
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__u32 blksize; __u32 padding; |
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}; |
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struct fuse_kstatfs { __u64 blocks; __u64 bfree; __u64 bavail; __u64 files; __u64 ffree; __u32 bsize; __u32 namelen; |
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__u32 frsize; __u32 padding; __u32 spare[6]; |
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}; |
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struct fuse_file_lock { __u64 start; __u64 end; __u32 type; __u32 pid; /* tgid */ }; |
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/** * Bitmasks for fuse_setattr_in.valid */ |
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#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) |
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#define FATTR_FH (1 << 6) |
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#define FATTR_ATIME_NOW (1 << 7) #define FATTR_MTIME_NOW (1 << 8) |
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#define FATTR_LOCKOWNER (1 << 9) |
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/** * 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 |
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* FOPEN_NONSEEKABLE: the file is not seekable |
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*/ #define FOPEN_DIRECT_IO (1 << 0) #define FOPEN_KEEP_CACHE (1 << 1) |
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#define FOPEN_NONSEEKABLE (1 << 2) |
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/** * INIT request/reply flags |
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* |
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* FUSE_POSIX_LOCKS: remote locking for POSIX file locks |
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* FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".." |
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* FUSE_DONT_MASK: don't apply umask to file mode on create operations |
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* FUSE_FLOCK_LOCKS: remote locking for BSD style file locks |
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*/ #define FUSE_ASYNC_READ (1 << 0) |
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#define FUSE_POSIX_LOCKS (1 << 1) |
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#define FUSE_FILE_OPS (1 << 2) |
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#define FUSE_ATOMIC_O_TRUNC (1 << 3) |
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#define FUSE_EXPORT_SUPPORT (1 << 4) |
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#define FUSE_BIG_WRITES (1 << 5) |
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#define FUSE_DONT_MASK (1 << 6) |
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#define FUSE_FLOCK_LOCKS (1 << 10) |
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/** |
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* CUSE INIT request/reply flags * * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl */ #define CUSE_UNRESTRICTED_IOCTL (1 << 0) /** |
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* Release flags */ #define FUSE_RELEASE_FLUSH (1 << 0) |
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#define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) |
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/** * Getattr flags */ #define FUSE_GETATTR_FH (1 << 0) |
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/** * Lock flags */ #define FUSE_LK_FLOCK (1 << 0) |
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/** * WRITE flags * * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed |
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* FUSE_WRITE_LOCKOWNER: lock_owner field is valid |
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*/ #define FUSE_WRITE_CACHE (1 << 0) |
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#define FUSE_WRITE_LOCKOWNER (1 << 1) /** * Read flags */ #define FUSE_READ_LOCKOWNER (1 << 1) |
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/** * Ioctl flags * * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed * FUSE_IOCTL_RETRY: retry with new iovecs |
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* FUSE_IOCTL_32BIT: 32bit ioctl |
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* FUSE_IOCTL_DIR: is a directory |
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* * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs */ #define FUSE_IOCTL_COMPAT (1 << 0) #define FUSE_IOCTL_UNRESTRICTED (1 << 1) #define FUSE_IOCTL_RETRY (1 << 2) |
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#define FUSE_IOCTL_32BIT (1 << 3) |
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#define FUSE_IOCTL_DIR (1 << 4) |
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#define FUSE_IOCTL_MAX_IOV 256 |
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/** * Poll flags * * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify */ #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) |
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enum fuse_opcode { |
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FUSE_LOOKUP = 1, FUSE_FORGET = 2, /* no reply */ FUSE_GETATTR = 3, |
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FUSE_SETATTR = 4, |
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FUSE_READLINK = 5, |
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FUSE_SYMLINK = 6, |
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FUSE_MKNOD = 8, FUSE_MKDIR = 9, FUSE_UNLINK = 10, FUSE_RMDIR = 11, FUSE_RENAME = 12, FUSE_LINK = 13, |
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FUSE_OPEN = 14, FUSE_READ = 15, FUSE_WRITE = 16, |
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FUSE_STATFS = 17, |
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FUSE_RELEASE = 18, FUSE_FSYNC = 20, |
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FUSE_SETXATTR = 21, FUSE_GETXATTR = 22, FUSE_LISTXATTR = 23, FUSE_REMOVEXATTR = 24, |
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FUSE_FLUSH = 25, |
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FUSE_INIT = 26, FUSE_OPENDIR = 27, FUSE_READDIR = 28, |
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FUSE_RELEASEDIR = 29, |
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FUSE_FSYNCDIR = 30, |
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FUSE_GETLK = 31, FUSE_SETLK = 32, FUSE_SETLKW = 33, |
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FUSE_ACCESS = 34, |
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FUSE_CREATE = 35, FUSE_INTERRUPT = 36, |
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FUSE_BMAP = 37, |
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FUSE_DESTROY = 38, |
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FUSE_IOCTL = 39, |
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FUSE_POLL = 40, |
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FUSE_NOTIFY_REPLY = 41, |
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FUSE_BATCH_FORGET = 42, |
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/* CUSE specific operations */ CUSE_INIT = 4096, |
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}; |
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enum fuse_notify_code { |
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FUSE_NOTIFY_POLL = 1, |
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FUSE_NOTIFY_INVAL_INODE = 2, FUSE_NOTIFY_INVAL_ENTRY = 3, |
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FUSE_NOTIFY_STORE = 4, |
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FUSE_NOTIFY_RETRIEVE = 5, |
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FUSE_NOTIFY_DELETE = 6, |
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FUSE_NOTIFY_CODE_MAX, }; |
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/* The read buffer is required to be at least 8k, but may be much larger */ #define FUSE_MIN_READ_BUFFER 8192 |
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#define FUSE_COMPAT_ENTRY_OUT_SIZE 120 |
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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 { |
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__u64 nlookup; |
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}; |
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struct fuse_forget_one { __u64 nodeid; __u64 nlookup; }; struct fuse_batch_forget_in { __u32 count; __u32 dummy; }; |
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struct fuse_getattr_in { __u32 getattr_flags; __u32 dummy; __u64 fh; }; |
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#define FUSE_COMPAT_ATTR_OUT_SIZE 96 |
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struct fuse_attr_out { __u64 attr_valid; /* Cache timeout for the attributes */ __u32 attr_valid_nsec; __u32 dummy; struct fuse_attr attr; }; |
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#define FUSE_COMPAT_MKNOD_IN_SIZE 8 |
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struct fuse_mknod_in { __u32 mode; __u32 rdev; |
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__u32 umask; __u32 padding; |
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}; struct fuse_mkdir_in { __u32 mode; |
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__u32 umask; |
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}; struct fuse_rename_in { __u64 newdir; }; struct fuse_link_in { __u64 oldnodeid; }; struct fuse_setattr_in { __u32 valid; |
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__u32 padding; |
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__u64 fh; __u64 size; |
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__u64 lock_owner; |
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__u64 atime; __u64 mtime; __u64 unused2; __u32 atimensec; __u32 mtimensec; __u32 unused3; __u32 mode; __u32 unused4; __u32 uid; __u32 gid; __u32 unused5; |
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}; |
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struct fuse_open_in { __u32 flags; |
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__u32 unused; }; struct fuse_create_in { __u32 flags; |
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__u32 mode; |
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__u32 umask; __u32 padding; |
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}; struct fuse_open_out { __u64 fh; __u32 open_flags; |
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__u32 padding; |
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}; struct fuse_release_in { __u64 fh; __u32 flags; |
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__u32 release_flags; __u64 lock_owner; |
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}; struct fuse_flush_in { __u64 fh; |
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__u32 unused; |
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__u32 padding; |
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__u64 lock_owner; |
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}; struct fuse_read_in { __u64 fh; __u64 offset; __u32 size; |
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__u32 read_flags; __u64 lock_owner; |
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__u32 flags; __u32 padding; |
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}; |
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#define FUSE_COMPAT_WRITE_IN_SIZE 24 |
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struct fuse_write_in { __u64 fh; __u64 offset; __u32 size; __u32 write_flags; |
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__u64 lock_owner; |
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__u32 flags; __u32 padding; |
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}; struct fuse_write_out { __u32 size; |
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__u32 padding; |
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}; |
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#define FUSE_COMPAT_STATFS_SIZE 48 |
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struct fuse_statfs_out { struct fuse_kstatfs st; }; |
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struct fuse_fsync_in { __u64 fh; __u32 fsync_flags; |
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__u32 padding; |
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}; |
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struct fuse_setxattr_in { __u32 size; __u32 flags; }; struct fuse_getxattr_in { __u32 size; |
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__u32 padding; |
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}; struct fuse_getxattr_out { __u32 size; |
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__u32 padding; |
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}; |
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struct fuse_lk_in { __u64 fh; __u64 owner; struct fuse_file_lock lk; |
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__u32 lk_flags; __u32 padding; |
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}; struct fuse_lk_out { struct fuse_file_lock lk; }; |
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struct fuse_access_in { __u32 mask; __u32 padding; }; |
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struct fuse_init_in { |
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__u32 major; __u32 minor; |
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__u32 max_readahead; __u32 flags; |
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}; |
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struct fuse_init_out { __u32 major; __u32 minor; |
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__u32 max_readahead; __u32 flags; |
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__u16 max_background; __u16 congestion_threshold; |
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__u32 max_write; }; |
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#define CUSE_INIT_INFO_MAX 4096 struct cuse_init_in { __u32 major; __u32 minor; __u32 unused; __u32 flags; }; struct cuse_init_out { __u32 major; __u32 minor; __u32 unused; __u32 flags; __u32 max_read; __u32 max_write; __u32 dev_major; /* chardev major */ __u32 dev_minor; /* chardev minor */ __u32 spare[10]; }; |
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struct fuse_interrupt_in { __u64 unique; }; |
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struct fuse_bmap_in { __u64 block; __u32 blocksize; __u32 padding; }; struct fuse_bmap_out { __u64 block; }; |
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struct fuse_ioctl_in { __u64 fh; __u32 flags; __u32 cmd; __u64 arg; __u32 in_size; __u32 out_size; }; |
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struct fuse_ioctl_iovec { __u64 base; __u64 len; }; |
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struct fuse_ioctl_out { __s32 result; __u32 flags; __u32 in_iovs; __u32 out_iovs; }; |
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struct fuse_poll_in { __u64 fh; __u64 kh; __u32 flags; __u32 padding; }; struct fuse_poll_out { __u32 revents; __u32 padding; }; struct fuse_notify_poll_wakeup_out { __u64 kh; }; |
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struct fuse_in_header { __u32 len; __u32 opcode; __u64 unique; __u64 nodeid; __u32 uid; __u32 gid; __u32 pid; |
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__u32 padding; |
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}; struct fuse_out_header { __u32 len; __s32 error; __u64 unique; }; |
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struct fuse_dirent { __u64 ino; __u64 off; __u32 namelen; __u32 type; char name[0]; }; |
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#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) |
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#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) |
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struct fuse_notify_inval_inode_out { __u64 ino; __s64 off; __s64 len; }; struct fuse_notify_inval_entry_out { __u64 parent; __u32 namelen; __u32 padding; }; |
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struct fuse_notify_delete_out { __u64 parent; __u64 child; __u32 namelen; __u32 padding; }; |
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struct fuse_notify_store_out { __u64 nodeid; __u64 offset; __u32 size; __u32 padding; }; |
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struct fuse_notify_retrieve_out { __u64 notify_unique; __u64 nodeid; __u64 offset; __u32 size; __u32 padding; }; /* Matches the size of fuse_write_in */ struct fuse_notify_retrieve_in { __u64 dummy1; __u64 offset; __u32 size; __u32 dummy2; __u64 dummy3; __u64 dummy4; }; |
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#endif /* _LINUX_FUSE_H */ |