| /* |
| * include/net/9p/9p.h |
| * |
| * 9P protocol definitions. |
| * |
| * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net> |
| * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> |
| * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> |
| * |
| * 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 |
| |
| /** |
| * 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 |
| * @P9_DEBUG_VPKT: Verbose packet debugging (full packet dump) |
| * |
| * 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), |
| P9_DEBUG_VPKT = (1<<12), |
| }; |
| |
| #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) |
| |
| #define P9_DUMP_PKT(way, pdu) p9pdu_dump(way, pdu) |
| |
| #else |
| #define P9_DPRINTK(level, format, arg...) do { } while (0) |
| #define P9_DUMP_PKT(way, pdu) 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_TRENAMEAT = 74, |
| P9_RRENAMEAT, |
| P9_TUNLINKAT = 76, |
| P9_RUNLINKAT, |
| 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 bit 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 bit 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_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_wstat - 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) |
| * @uid: owner name |
| * @gid: group owner |
| * @muid: last modifier |
| * @extension: area used to encode extended UNIX support |
| * @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; |
| }; |
| |
| struct p9_rstatfs { |
| u32 type; |
| u32 bsize; |
| u64 blocks; |
| u64 bfree; |
| u64 bavail; |
| u64 files; |
| u64 ffree; |
| u64 fsid; |
| u32 namelen; |
| }; |
| |
| /** |
| * 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 current position in buffer |
| * @capacity: used by marshalling routines to track total malloc'd capacity |
| * @pubuf: Payload user buffer given by the caller |
| * @pkbuf: 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 */ |