From patchwork Tue May 17 18:35:36 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sasha Levin X-Patchwork-Id: 792142 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p4HIaJ9c004117 for ; Tue, 17 May 2011 18:36:27 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756378Ab1EQSgM (ORCPT ); Tue, 17 May 2011 14:36:12 -0400 Received: from mail-fx0-f46.google.com ([209.85.161.46]:39009 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756065Ab1EQSgK (ORCPT ); Tue, 17 May 2011 14:36:10 -0400 Received: by fxm17 with SMTP id 17so663161fxm.19 for ; Tue, 17 May 2011 11:36:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:from:to:cc:subject:date:message-id:x-mailer; bh=J8Y5jLT/XXNgW5pZWflyT28sa1uliej2nP7cIO49Lzw=; b=LEIWbyT8+VpSE8qXUa0bzJOGD9T7Wapo2o4iMlaLiOjcSyPEiwagqLq/gPbeEnPHgr R/6qvfvcVGvOWJBFwYjz/SkF2nTFRAyj7uSDmGakNBk5NoGeQoG6D+tuzEqNHSr2Il9q VeXR7SvEsGgBE2LAK/mIIZjK6zTQJSdKP3wps= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer; b=SO4QCDeeaT9seEiEqKBpJIhu0rw/w/i3jzo8WlcphPso0U4MkwrCKMdwe8KzOAA9rs Jya2ZN7x1vUI/UPY0+5fQTgny/wTWQO+JWf6BgpoxvwE4FJt4D4zTOEdGl0AxajfPOcy icU07GMmfsrM3/nEXhqf19PmwNCVNrAYjTrYI= Received: by 10.223.6.11 with SMTP id 11mr1190816fax.100.1305657368929; Tue, 17 May 2011 11:36:08 -0700 (PDT) Received: from localhost.localdomain ([188.120.132.169]) by mx.google.com with ESMTPS id c24sm325814fak.7.2011.05.17.11.36.06 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 17 May 2011 11:36:08 -0700 (PDT) From: Sasha Levin To: penberg@kernel.org Cc: mingo@elte.hu, asias.hejun@gmail.com, prasadjoshi124@gmail.com, gorcunov@gmail.com, kvm@vger.kernel.org, Sasha Levin Subject: [PATCH 1/2] kvm tools: Copy net/9p/9p.h Date: Tue, 17 May 2011 21:35:36 +0300 Message-Id: <1305657337-2584-1-git-send-email-levinsasha928@gmail.com> X-Mailer: git-send-email 1.7.5.rc3 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Tue, 17 May 2011 18:36:27 +0000 (UTC) Header could not be included directly because among some minor issues, the original header declared the same function twice: int p9_errstr2errno(char *errstr, int len); int p9_errstr2errno(char *, int); A patch has been sent to 9P maintainers, this header should be removed once the patch is in. Until then, use a modified copy of the header. Signed-off-by: Sasha Levin --- tools/kvm/include/net/9p/9p.h | 735 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 735 insertions(+), 0 deletions(-) create mode 100644 tools/kvm/include/net/9p/9p.h diff --git a/tools/kvm/include/net/9p/9p.h b/tools/kvm/include/net/9p/9p.h new file mode 100644 index 0000000..cc11592 --- /dev/null +++ b/tools/kvm/include/net/9p/9p.h @@ -0,0 +1,735 @@ +/* + * include/net/9p/9p.h + * + * 9P protocol definitions. + * + * Copyright (C) 2005 by Latchesar Ionkov + * Copyright (C) 2004 by Eric Van Hensbergen + * Copyright (C) 2002 by Ron Minnich + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#ifndef NET_9P_H +#define NET_9P_H + +#pragma pack(1) + +/** + * enum p9_debug_flags - bits for mount time debug parameter + * @P9_DEBUG_ERROR: more verbose error messages including original error string + * @P9_DEBUG_9P: 9P protocol tracing + * @P9_DEBUG_VFS: VFS API tracing + * @P9_DEBUG_CONV: protocol conversion tracing + * @P9_DEBUG_MUX: trace management of concurrent transactions + * @P9_DEBUG_TRANS: transport tracing + * @P9_DEBUG_SLABS: memory management tracing + * @P9_DEBUG_FCALL: verbose dump of protocol messages + * @P9_DEBUG_FID: fid allocation/deallocation tracking + * @P9_DEBUG_PKT: packet marshalling/unmarshalling + * @P9_DEBUG_FSC: FS-cache tracing + * + * These flags are passed at mount time to turn on various levels of + * verbosity and tracing which will be output to the system logs. + */ + +enum p9_debug_flags { + P9_DEBUG_ERROR = (1<<0), + P9_DEBUG_9P = (1<<2), + P9_DEBUG_VFS = (1<<3), + P9_DEBUG_CONV = (1<<4), + P9_DEBUG_MUX = (1<<5), + P9_DEBUG_TRANS = (1<<6), + P9_DEBUG_SLABS = (1<<7), + P9_DEBUG_FCALL = (1<<8), + P9_DEBUG_FID = (1<<9), + P9_DEBUG_PKT = (1<<10), + P9_DEBUG_FSC = (1<<11), +}; + +#ifdef CONFIG_NET_9P_DEBUG +extern unsigned int p9_debug_level; + +#define P9_DPRINTK(level, format, arg...) \ +do { \ + if ((p9_debug_level & level) == level) {\ + if (level == P9_DEBUG_9P) \ + printk(KERN_NOTICE "(%8.8d) " \ + format , task_pid_nr(current) , ## arg); \ + else \ + printk(KERN_NOTICE "-- %s (%d): " \ + format , __func__, task_pid_nr(current) , ## arg); \ + } \ +} while (0) + +#else +#define P9_DPRINTK(level, format, arg...) do { } while (0) +#endif + +#define P9_EPRINTK(level, format, arg...) \ +do { \ + printk(level "9p: %s (%d): " \ + format , __func__, task_pid_nr(current), ## arg); \ +} while (0) + +/** + * enum p9_msg_t - 9P message types + * @P9_TLERROR: not used + * @P9_RLERROR: response for any failed request for 9P2000.L + * @P9_TSTATFS: file system status request + * @P9_RSTATFS: file system status response + * @P9_TSYMLINK: make symlink request + * @P9_RSYMLINK: make symlink response + * @P9_TMKNOD: create a special file object request + * @P9_RMKNOD: create a special file object response + * @P9_TLCREATE: prepare a handle for I/O on an new file for 9P2000.L + * @P9_RLCREATE: response with file access information for 9P2000.L + * @P9_TRENAME: rename request + * @P9_RRENAME: rename response + * @P9_TMKDIR: create a directory request + * @P9_RMKDIR: create a directory response + * @P9_TVERSION: version handshake request + * @P9_RVERSION: version handshake response + * @P9_TAUTH: request to establish authentication channel + * @P9_RAUTH: response with authentication information + * @P9_TATTACH: establish user access to file service + * @P9_RATTACH: response with top level handle to file hierarchy + * @P9_TERROR: not used + * @P9_RERROR: response for any failed request + * @P9_TFLUSH: request to abort a previous request + * @P9_RFLUSH: response when previous request has been cancelled + * @P9_TWALK: descend a directory hierarchy + * @P9_RWALK: response with new handle for position within hierarchy + * @P9_TOPEN: prepare a handle for I/O on an existing file + * @P9_ROPEN: response with file access information + * @P9_TCREATE: prepare a handle for I/O on a new file + * @P9_RCREATE: response with file access information + * @P9_TREAD: request to transfer data from a file or directory + * @P9_RREAD: response with data requested + * @P9_TWRITE: reuqest to transfer data to a file + * @P9_RWRITE: response with out much data was transferred to file + * @P9_TCLUNK: forget about a handle to an entity within the file system + * @P9_RCLUNK: response when server has forgotten about the handle + * @P9_TREMOVE: request to remove an entity from the hierarchy + * @P9_RREMOVE: response when server has removed the entity + * @P9_TSTAT: request file entity attributes + * @P9_RSTAT: response with file entity attributes + * @P9_TWSTAT: request to update file entity attributes + * @P9_RWSTAT: response when file entity attributes are updated + * + * There are 14 basic operations in 9P2000, paired as + * requests and responses. The one special case is ERROR + * as there is no @P9_TERROR request for clients to transmit to + * the server, but the server may respond to any other request + * with an @P9_RERROR. + * + * See Also: http://plan9.bell-labs.com/sys/man/5/INDEX.html + */ + +enum p9_msg_t { + P9_TLERROR = 6, + P9_RLERROR, + P9_TSTATFS = 8, + P9_RSTATFS, + P9_TLOPEN = 12, + P9_RLOPEN, + P9_TLCREATE = 14, + P9_RLCREATE, + P9_TSYMLINK = 16, + P9_RSYMLINK, + P9_TMKNOD = 18, + P9_RMKNOD, + P9_TRENAME = 20, + P9_RRENAME, + P9_TREADLINK = 22, + P9_RREADLINK, + P9_TGETATTR = 24, + P9_RGETATTR, + P9_TSETATTR = 26, + P9_RSETATTR, + P9_TXATTRWALK = 30, + P9_RXATTRWALK, + P9_TXATTRCREATE = 32, + P9_RXATTRCREATE, + P9_TREADDIR = 40, + P9_RREADDIR, + P9_TFSYNC = 50, + P9_RFSYNC, + P9_TLOCK = 52, + P9_RLOCK, + P9_TGETLOCK = 54, + P9_RGETLOCK, + P9_TLINK = 70, + P9_RLINK, + P9_TMKDIR = 72, + P9_RMKDIR, + P9_TVERSION = 100, + P9_RVERSION, + P9_TAUTH = 102, + P9_RAUTH, + P9_TATTACH = 104, + P9_RATTACH, + P9_TERROR = 106, + P9_RERROR, + P9_TFLUSH = 108, + P9_RFLUSH, + P9_TWALK = 110, + P9_RWALK, + P9_TOPEN = 112, + P9_ROPEN, + P9_TCREATE = 114, + P9_RCREATE, + P9_TREAD = 116, + P9_RREAD, + P9_TWRITE = 118, + P9_RWRITE, + P9_TCLUNK = 120, + P9_RCLUNK, + P9_TREMOVE = 122, + P9_RREMOVE, + P9_TSTAT = 124, + P9_RSTAT, + P9_TWSTAT = 126, + P9_RWSTAT, +}; + +/** + * enum p9_open_mode_t - 9P open modes + * @P9_OREAD: open file for reading only + * @P9_OWRITE: open file for writing only + * @P9_ORDWR: open file for reading or writing + * @P9_OEXEC: open file for execution + * @P9_OTRUNC: truncate file to zero-length before opening it + * @P9_OREXEC: close the file when an exec(2) system call is made + * @P9_ORCLOSE: remove the file when the file is closed + * @P9_OAPPEND: open the file and seek to the end + * @P9_OEXCL: only create a file, do not open it + * + * 9P open modes differ slightly from Posix standard modes. + * In particular, there are extra modes which specify different + * semantic behaviors than may be available on standard Posix + * systems. For example, @P9_OREXEC and @P9_ORCLOSE are modes that + * most likely will not be issued from the Linux VFS client, but may + * be supported by servers. + * + * See Also: http://plan9.bell-labs.com/magic/man2html/2/open + */ + +enum p9_open_mode_t { + P9_OREAD = 0x00, + P9_OWRITE = 0x01, + P9_ORDWR = 0x02, + P9_OEXEC = 0x03, + P9_OTRUNC = 0x10, + P9_OREXEC = 0x20, + P9_ORCLOSE = 0x40, + P9_OAPPEND = 0x80, + P9_OEXCL = 0x1000, +}; + +/** + * enum p9_perm_t - 9P permissions + * @P9_DMDIR: mode bite for directories + * @P9_DMAPPEND: mode bit for is append-only + * @P9_DMEXCL: mode bit for excluse use (only one open handle allowed) + * @P9_DMMOUNT: mode bite for mount points + * @P9_DMAUTH: mode bit for authentication file + * @P9_DMTMP: mode bit for non-backed-up files + * @P9_DMSYMLINK: mode bit for symbolic links (9P2000.u) + * @P9_DMLINK: mode bit for hard-link (9P2000.u) + * @P9_DMDEVICE: mode bit for device files (9P2000.u) + * @P9_DMNAMEDPIPE: mode bit for named pipe (9P2000.u) + * @P9_DMSOCKET: mode bit for socket (9P2000.u) + * @P9_DMSETUID: mode bit for setuid (9P2000.u) + * @P9_DMSETGID: mode bit for setgid (9P2000.u) + * @P9_DMSETVTX: mode bit for sticky bit (9P2000.u) + * + * 9P permissions differ slightly from Posix standard modes. + * + * See Also: http://plan9.bell-labs.com/magic/man2html/2/stat + */ +enum p9_perm_t { + P9_DMDIR = 0x80000000, + P9_DMAPPEND = 0x40000000, + P9_DMEXCL = 0x20000000, + P9_DMMOUNT = 0x10000000, + P9_DMAUTH = 0x08000000, + P9_DMTMP = 0x04000000, +/* 9P2000.u extensions */ + P9_DMSYMLINK = 0x02000000, + P9_DMLINK = 0x01000000, + P9_DMDEVICE = 0x00800000, + P9_DMNAMEDPIPE = 0x00200000, + P9_DMSOCKET = 0x00100000, + P9_DMSETUID = 0x00080000, + P9_DMSETGID = 0x00040000, + P9_DMSETVTX = 0x00010000, +}; + +/** + * enum p9_qid_t - QID types + * @P9_QTDIR: directory + * @P9_QTAPPEND: append-only + * @P9_QTEXCL: excluse use (only one open handle allowed) + * @P9_QTMOUNT: mount points + * @P9_QTAUTH: authentication file + * @P9_QTTMP: non-backed-up files + * @P9_QTSYMLINK: symbolic links (9P2000.u) + * @P9_QTLINK: hard-link (9P2000.u) + * @P9_QTFILE: normal files + * + * QID types are a subset of permissions - they are primarily + * used to differentiate semantics for a file system entity via + * a jump-table. Their value is also the most significant 16 bits + * of the permission_t + * + * See Also: http://plan9.bell-labs.com/magic/man2html/2/stat + */ +enum p9_qid_t { + P9_QTDIR = 0x80, + P9_QTAPPEND = 0x40, + P9_QTEXCL = 0x20, + P9_QTMOUNT = 0x10, + P9_QTAUTH = 0x08, + P9_QTTMP = 0x04, + P9_QTSYMLINK = 0x02, + P9_QTLINK = 0x01, + P9_QTFILE = 0x00, +}; + +/* 9P Magic Numbers */ +#define P9_NOTAG (u16)(~0) +#define P9_NOFID (u32)(~0) +#define P9_MAXWELEM 16 + +/* ample room for Twrite/Rread header */ +#define P9_IOHDRSZ 24 + +/* Room for readdir header */ +#define P9_READDIRHDRSZ 24 + +/** + * struct p9_str - length prefixed string type + * @len: length of the string + * @str: the string + * + * The protocol uses length prefixed strings for all + * string data, so we replicate that for our internal + * string members. + */ + +struct p9_str { + u16 len; + char *str; +}; + +/** + * struct p9_qid - file system entity information + * @type: 8-bit type &p9_qid_t + * @version: 16-bit monotonically incrementing version number + * @path: 64-bit per-server-unique ID for a file system element + * + * qids are identifiers used by 9P servers to track file system + * entities. The type is used to differentiate semantics for operations + * on the entity (ie. read means something different on a directory than + * on a file). The path provides a server unique index for an entity + * (roughly analogous to an inode number), while the version is updated + * every time a file is modified and can be used to maintain cache + * coherency between clients and serves. + * Servers will often differentiate purely synthetic entities by setting + * their version to 0, signaling that they should never be cached and + * should be accessed synchronously. + * + * See Also://plan9.bell-labs.com/magic/man2html/2/stat + */ + +struct p9_qid { + u8 type; + u32 version; + u64 path; +}; + +/** + * struct p9_stat - file system metadata information + * @size: length prefix for this stat structure instance + * @type: the type of the server (equivalent to a major number) + * @dev: the sub-type of the server (equivalent to a minor number) + * @qid: unique id from the server of type &p9_qid + * @mode: Plan 9 format permissions of type &p9_perm_t + * @atime: Last access/read time + * @mtime: Last modify/write time + * @length: file length + * @name: last element of path (aka filename) in type &p9_str + * @uid: owner name in type &p9_str + * @gid: group owner in type &p9_str + * @muid: last modifier in type &p9_str + * @extension: area used to encode extended UNIX support in type &p9_str + * @n_uid: numeric user id of owner (part of 9p2000.u extension) + * @n_gid: numeric group id (part of 9p2000.u extension) + * @n_muid: numeric user id of laster modifier (part of 9p2000.u extension) + * + * See Also: http://plan9.bell-labs.com/magic/man2html/2/stat + */ + +struct p9_wstat { + u16 size; + u16 type; + u32 dev; + struct p9_qid qid; + u32 mode; + u32 atime; + u32 mtime; + u64 length; + char *name; + char *uid; + char *gid; + char *muid; + char *extension; /* 9p2000.u extensions */ + u32 n_uid; /* 9p2000.u extensions */ + u32 n_gid; /* 9p2000.u extensions */ + u32 n_muid; /* 9p2000.u extensions */ +}; + +struct p9_stat_dotl { + u64 st_result_mask; + struct p9_qid qid; + u32 st_mode; + u32 st_uid; + u32 st_gid; + u64 st_nlink; + u64 st_rdev; + u64 st_size; + u64 st_blksize; + u64 st_blocks; + u64 st_atime_sec; + u64 st_atime_nsec; + u64 st_mtime_sec; + u64 st_mtime_nsec; + u64 st_ctime_sec; + u64 st_ctime_nsec; + u64 st_btime_sec; + u64 st_btime_nsec; + u64 st_gen; + u64 st_data_version; +}; + +#define P9_STATS_MODE 0x00000001ULL +#define P9_STATS_NLINK 0x00000002ULL +#define P9_STATS_UID 0x00000004ULL +#define P9_STATS_GID 0x00000008ULL +#define P9_STATS_RDEV 0x00000010ULL +#define P9_STATS_ATIME 0x00000020ULL +#define P9_STATS_MTIME 0x00000040ULL +#define P9_STATS_CTIME 0x00000080ULL +#define P9_STATS_INO 0x00000100ULL +#define P9_STATS_SIZE 0x00000200ULL +#define P9_STATS_BLOCKS 0x00000400ULL + +#define P9_STATS_BTIME 0x00000800ULL +#define P9_STATS_GEN 0x00001000ULL +#define P9_STATS_DATA_VERSION 0x00002000ULL + +#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ +#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ + +/** + * struct p9_iattr_dotl - P9 inode attribute for setattr + * @valid: bitfield specifying which fields are valid + * same as in struct iattr + * @mode: File permission bits + * @uid: user id of owner + * @gid: group id + * @size: File size + * @atime_sec: Last access time, seconds + * @atime_nsec: Last access time, nanoseconds + * @mtime_sec: Last modification time, seconds + * @mtime_nsec: Last modification time, nanoseconds + */ + +struct p9_iattr_dotl { + u32 valid; + u32 mode; + u32 uid; + u32 gid; + u64 size; + u64 atime_sec; + u64 atime_nsec; + u64 mtime_sec; + u64 mtime_nsec; +}; + +#define P9_LOCK_SUCCESS 0 +#define P9_LOCK_BLOCKED 1 +#define P9_LOCK_ERROR 2 +#define P9_LOCK_GRACE 3 + +#define P9_LOCK_FLAGS_BLOCK 1 +#define P9_LOCK_FLAGS_RECLAIM 2 + +/* struct p9_flock: POSIX lock structure + * @type - type of lock + * @flags - lock flags + * @start - starting offset of the lock + * @length - number of bytes + * @proc_id - process id which wants to take lock + * @client_id - client id + */ + +struct p9_flock { + u8 type; + u32 flags; + u64 start; + u64 length; + u32 proc_id; + char *client_id; +}; + +/* struct p9_getlock: getlock structure + * @type - type of lock + * @start - starting offset of the lock + * @length - number of bytes + * @proc_id - process id which wants to take lock + * @client_id - client id + */ + +struct p9_getlock { + u8 type; + u64 start; + u64 length; + u32 proc_id; + char *client_id; +}; + +/* Structures for Protocol Operations */ +struct p9_tstatfs { + u32 fid; +}; + +struct p9_rstatfs { + u32 type; + u32 bsize; + u64 blocks; + u64 bfree; + u64 bavail; + u64 files; + u64 ffree; + u64 fsid; + u32 namelen; +}; + +struct p9_trename { + u32 fid; + u32 newdirfid; + struct p9_str name; +}; + +struct p9_rrename { +}; + +struct p9_tversion { + u32 msize; + struct p9_str version; +}; + +struct p9_rversion { + u32 msize; + struct p9_str version; +}; + +struct p9_tauth { + u32 afid; + struct p9_str uname; + struct p9_str aname; + u32 n_uname; /* 9P2000.u extensions */ +}; + +struct p9_rauth { + struct p9_qid qid; +}; + +struct p9_rerror { + struct p9_str error; + u32 _errno; /* 9p2000.u extension */ +}; + +struct p9_tflush { + u16 oldtag; +}; + +struct p9_rflush { +}; + +struct p9_tattach { + u32 fid; + u32 afid; + struct p9_str uname; + struct p9_str aname; + u32 n_uname; /* 9P2000.u extensions */ +}; + +struct p9_rattach { + struct p9_qid qid; +}; + +struct p9_twalk { + u32 fid; + u32 newfid; + u16 nwname; + struct p9_str wnames[16]; +}; + +struct p9_rwalk { + u16 nwqid; + struct p9_qid wqids[16]; +}; + +struct p9_topen { + u32 fid; + u8 mode; +}; + +struct p9_ropen { + struct p9_qid qid; + u32 iounit; +}; + +struct p9_tcreate { + u32 fid; + struct p9_str name; + u32 perm; + u8 mode; + struct p9_str extension; +}; + +struct p9_rcreate { + struct p9_qid qid; + u32 iounit; +}; + +struct p9_tread { + u32 fid; + u64 offset; + u32 count; +}; + +struct p9_rread { + u32 count; + u8 *data; +}; + +struct p9_twrite { + u32 fid; + u64 offset; + u32 count; + u8 *data; +}; + +struct p9_rwrite { + u32 count; +}; + +struct p9_treaddir { + u32 fid; + u64 offset; + u32 count; +}; + +struct p9_rreaddir { + u32 count; + u8 *data; +}; + + +struct p9_tclunk { + u32 fid; +}; + +struct p9_rclunk { +}; + +struct p9_tremove { + u32 fid; +}; + +struct p9_rremove { +}; + +struct p9_tstat { + u32 fid; +}; + +struct p9_rstat { + struct p9_wstat stat; +}; + +struct p9_twstat { + u32 fid; + struct p9_wstat stat; +}; + +struct p9_rwstat { +}; + +/** + * struct p9_fcall - primary packet structure + * @size: prefixed length of the structure + * @id: protocol operating identifier of type &p9_msg_t + * @tag: transaction id of the request + * @offset: used by marshalling routines to track currentposition in buffer + * @capacity: used by marshalling routines to track total malloc'd capacity + * @pubuf: Payload user buffer given by the caller + * @pubuf: Payload kernel buffer given by the caller + * @pbuf_size: pubuf/pkbuf(only one will be !NULL) size to be read/write. + * @private: For transport layer's use. + * @sdata: payload + * + * &p9_fcall represents the structure for all 9P RPC + * transactions. Requests are packaged into fcalls, and reponses + * must be extracted from them. + * + * See Also: http://plan9.bell-labs.com/magic/man2html/2/fcall + */ + +struct p9_fcall { + u32 size; + u8 id; + u16 tag; + + size_t offset; + size_t capacity; + char __user *pubuf; + char *pkbuf; + size_t pbuf_size; + void *private; + + u8 *sdata; +}; + +struct p9_idpool; + +int p9_errstr2errno(char *errstr, int len); + +struct p9_idpool *p9_idpool_create(void); +void p9_idpool_destroy(struct p9_idpool *); +int p9_idpool_get(struct p9_idpool *p); +void p9_idpool_put(int id, struct p9_idpool *p); +int p9_idpool_check(int id, struct p9_idpool *p); + +int p9_error_init(void); +int p9_trans_fd_init(void); +void p9_trans_fd_exit(void); +#endif /* NET_9P_H */