diff options
Diffstat (limited to 'include/net/9p')
| -rw-r--r-- | include/net/9p/9p.h | 496 | ||||
| -rw-r--r-- | include/net/9p/client.h | 213 | ||||
| -rw-r--r-- | include/net/9p/transport.h | 68 |
3 files changed, 442 insertions, 335 deletions
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h index b3d3e27c629..27dfe85772b 100644 --- a/include/net/9p/9p.h +++ b/include/net/9p/9p.h @@ -27,8 +27,6 @@ #ifndef NET_9P_H #define NET_9P_H -#ifdef CONFIG_NET_9P_DEBUG - /** * enum p9_debug_flags - bits for mount time debug parameter * @P9_DEBUG_ERROR: more verbose error messages including original error string @@ -39,6 +37,10 @@ * @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. @@ -53,34 +55,40 @@ enum p9_debug_flags { 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) \ - printk(KERN_NOTICE "-- %s (%d): " \ - format , __FUNCTION__, task_pid_nr(current) , ## arg); \ -} while (0) - -#define PRINT_FCALL_ERROR(s, fcall) P9_DPRINTK(P9_DEBUG_ERROR, \ - "%s: %.*s\n", s, fcall?fcall->params.rerror.error.len:0, \ - fcall?fcall->params.rerror.error.str:""); - +__printf(3, 4) +void _p9_debug(enum p9_debug_flags level, const char *func, + const char *fmt, ...); +#define p9_debug(level, fmt, ...) \ + _p9_debug(level, __func__, fmt, ##__VA_ARGS__) #else -#define P9_DPRINTK(level, format, arg...) do { } while (0) -#define PRINT_FCALL_ERROR(s, fcall) do { } while (0) +#define p9_debug(level, fmt, ...) \ + no_printk(fmt, ##__VA_ARGS__) #endif -#define P9_EPRINTK(level, format, arg...) \ -do { \ - printk(level "9p: %s (%d): " \ - format , __FUNCTION__, 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 @@ -100,7 +108,7 @@ do { \ * @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 transfered to 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 @@ -120,6 +128,46 @@ do { \ */ 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, @@ -186,10 +234,10 @@ enum p9_open_mode_t { /** * enum p9_perm_t - 9P permissions - * @P9_DMDIR: mode bite for directories + * @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 bite for mount points + * @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) @@ -223,6 +271,35 @@ enum p9_perm_t { P9_DMSETVTX = 0x00010000, }; +/* 9p2000.L open flags */ +#define P9_DOTL_RDONLY 00000000 +#define P9_DOTL_WRONLY 00000001 +#define P9_DOTL_RDWR 00000002 +#define P9_DOTL_NOACCESS 00000003 +#define P9_DOTL_CREATE 00000100 +#define P9_DOTL_EXCL 00000200 +#define P9_DOTL_NOCTTY 00000400 +#define P9_DOTL_TRUNC 00001000 +#define P9_DOTL_APPEND 00002000 +#define P9_DOTL_NONBLOCK 00004000 +#define P9_DOTL_DSYNC 00010000 +#define P9_DOTL_FASYNC 00020000 +#define P9_DOTL_DIRECT 00040000 +#define P9_DOTL_LARGEFILE 00100000 +#define P9_DOTL_DIRECTORY 00200000 +#define P9_DOTL_NOFOLLOW 00400000 +#define P9_DOTL_NOATIME 01000000 +#define P9_DOTL_CLOEXEC 02000000 +#define P9_DOTL_SYNC 04000000 + +/* 9p2000.L at flags */ +#define P9_DOTL_AT_REMOVEDIR 0x200 + +/* 9p2000.L lock type */ +#define P9_LOCK_TYPE_RDLCK 0 +#define P9_LOCK_TYPE_WRLCK 1 +#define P9_LOCK_TYPE_UNLCK 2 + /** * enum p9_qid_t - QID types * @P9_QTDIR: directory @@ -237,7 +314,7 @@ enum p9_perm_t { * * 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 signifigant 16 bits + * 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 @@ -262,20 +339,11 @@ enum p9_qid_t { /* ample room for Twrite/Rread header */ #define P9_IOHDRSZ 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. - */ +/* Room for readdir header */ +#define P9_READDIRHDRSZ 24 -struct p9_str { - u16 len; - char *str; -}; +/* size of header for zero copy read/write */ +#define P9_ZC_HDR_SZ 4096 /** * struct p9_qid - file system entity information @@ -304,20 +372,20 @@ struct p9_qid { }; /** - * struct p9_stat - file system metadata information + * struct p9_wstat - file system metadata information * @size: length prefix for this stat structure instance - * @type: the type of the server (equivilent to a major number) - * @dev: the sub-type of the server (equivilent to a minor number) + * @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 + * @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) @@ -325,33 +393,6 @@ struct p9_qid { * See Also: http://plan9.bell-labs.com/magic/man2html/2/stat */ -struct p9_stat { - u16 size; - u16 type; - u32 dev; - struct p9_qid qid; - u32 mode; - u32 atime; - u32 mtime; - u64 length; - struct p9_str name; - struct p9_str uid; - struct p9_str gid; - struct p9_str muid; - struct p9_str extension; /* 9p2000.u extensions */ - u32 n_uid; /* 9p2000.u extensions */ - u32 n_gid; /* 9p2000.u extensions */ - u32 n_muid; /* 9p2000.u extensions */ -}; - -/* - * file metadata (stat) structure used to create Twstat message - * The is identical to &p9_stat, but the strings don't point to - * the same memory block and should be freed separately - * - * See Also: http://plan9.bell-labs.com/magic/man2html/2/stat - */ - struct p9_wstat { u16 size; u16 type; @@ -366,142 +407,131 @@ struct p9_wstat { 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 */ -}; - -/* Structures for Protocol Operations */ -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 */ + kuid_t n_uid; /* 9p2000.u extensions */ + kgid_t n_gid; /* 9p2000.u extensions */ + kuid_t n_muid; /* 9p2000.u extensions */ }; -struct p9_rauth { +struct p9_stat_dotl { + u64 st_result_mask; struct p9_qid qid; -}; - -struct p9_rerror { - struct p9_str error; - u32 errno; /* 9p2000.u extension */ -}; - -struct p9_tflush { - u16 oldtag; -}; + u32 st_mode; + kuid_t st_uid; + kgid_t 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_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_tclunk { - u32 fid; -}; - -struct p9_rclunk { -}; - -struct p9_tremove { - u32 fid; -}; +/** + * 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_rremove { -}; +struct p9_iattr_dotl { + u32 valid; + u32 mode; + kuid_t uid; + kgid_t 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_tstat { - u32 fid; +struct p9_flock { + u8 type; + u32 flags; + u64 start; + u64 length; + u32 proc_id; + char *client_id; }; -struct p9_rstat { - struct p9_stat stat; -}; +/* 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_twstat { - u32 fid; - struct p9_stat stat; +struct p9_getlock { + u8 type; + u64 start; + u64 length; + u32 proc_id; + char *client_id; }; -struct p9_rwstat { +struct p9_rstatfs { + u32 type; + u32 bsize; + u64 blocks; + u64 bfree; + u64 bavail; + u64 files; + u64 ffree; + u64 fsid; + u32 namelen; }; /** @@ -509,8 +539,9 @@ struct p9_rwstat { * @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 * @sdata: payload - * @params: per-operation parameters * * &p9_fcall represents the structure for all 9P RPC * transactions. Requests are packaged into fcalls, and reponses @@ -523,68 +554,15 @@ struct p9_fcall { u32 size; u8 id; u16 tag; - void *sdata; - - union { - struct p9_tversion tversion; - struct p9_rversion rversion; - struct p9_tauth tauth; - struct p9_rauth rauth; - struct p9_rerror rerror; - struct p9_tflush tflush; - struct p9_rflush rflush; - struct p9_tattach tattach; - struct p9_rattach rattach; - struct p9_twalk twalk; - struct p9_rwalk rwalk; - struct p9_topen topen; - struct p9_ropen ropen; - struct p9_tcreate tcreate; - struct p9_rcreate rcreate; - struct p9_tread tread; - struct p9_rread rread; - struct p9_twrite twrite; - struct p9_rwrite rwrite; - struct p9_tclunk tclunk; - struct p9_rclunk rclunk; - struct p9_tremove tremove; - struct p9_rremove rremove; - struct p9_tstat tstat; - struct p9_rstat rstat; - struct p9_twstat twstat; - struct p9_rwstat rwstat; - } params; + + size_t offset; + size_t capacity; + + u8 *sdata; }; struct p9_idpool; -int p9_deserialize_stat(void *buf, u32 buflen, struct p9_stat *stat, - int dotu); -int p9_deserialize_fcall(void *buf, u32 buflen, struct p9_fcall *fc, int dotu); -void p9_set_tag(struct p9_fcall *fc, u16 tag); -struct p9_fcall *p9_create_tversion(u32 msize, char *version); -struct p9_fcall *p9_create_tattach(u32 fid, u32 afid, char *uname, - char *aname, u32 n_uname, int dotu); -struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname, - u32 n_uname, int dotu); -struct p9_fcall *p9_create_tflush(u16 oldtag); -struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname, - char **wnames); -struct p9_fcall *p9_create_topen(u32 fid, u8 mode); -struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode, - char *extension, int dotu); -struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count); -struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count, - const char *data); -struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count, - const char __user *data); -struct p9_fcall *p9_create_tclunk(u32 fid); -struct p9_fcall *p9_create_tremove(u32 fid); -struct p9_fcall *p9_create_tstat(u32 fid); -struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat, - int dotu); - -int p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int dotu); int p9_errstr2errno(char *errstr, int len); struct p9_idpool *p9_idpool_create(void); @@ -594,6 +572,6 @@ 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_errstr2errno(char *, int); int p9_trans_fd_init(void); +void p9_trans_fd_exit(void); #endif /* NET_9P_H */ diff --git a/include/net/9p/client.h b/include/net/9p/client.h index c936dd14de4..6fab66c5c5a 100644 --- a/include/net/9p/client.h +++ b/include/net/9p/client.h @@ -26,33 +26,145 @@ #ifndef NET_9P_CLIENT_H #define NET_9P_CLIENT_H +#include <linux/utsname.h> + +/* Number of requests per row */ +#define P9_ROW_MAXTAG 255 + +/** enum p9_proto_versions - 9P protocol versions + * @p9_proto_legacy: 9P Legacy mode, pre-9P2000.u + * @p9_proto_2000u: 9P2000.u extension + * @p9_proto_2000L: 9P2000.L extension + */ + +enum p9_proto_versions{ + p9_proto_legacy, + p9_proto_2000u, + p9_proto_2000L, +}; + + +/** + * enum p9_trans_status - different states of underlying transports + * @Connected: transport is connected and healthy + * @Disconnected: transport has been disconnected + * @Hung: transport is connected by wedged + * + * This enumeration details the various states a transport + * instatiation can be in. + */ + +enum p9_trans_status { + Connected, + BeginDisconnect, + Disconnected, + Hung, +}; + +/** + * enum p9_req_status_t - status of a request + * @REQ_STATUS_IDLE: request slot unused + * @REQ_STATUS_ALLOC: request has been allocated but not sent + * @REQ_STATUS_UNSENT: request waiting to be sent + * @REQ_STATUS_SENT: request sent to server + * @REQ_STATUS_RCVD: response received from server + * @REQ_STATUS_FLSHD: request has been flushed + * @REQ_STATUS_ERROR: request encountered an error on the client side + * + * The @REQ_STATUS_IDLE state is used to mark a request slot as unused + * but use is actually tracked by the idpool structure which handles tag + * id allocation. + * + */ + +enum p9_req_status_t { + REQ_STATUS_IDLE, + REQ_STATUS_ALLOC, + REQ_STATUS_UNSENT, + REQ_STATUS_SENT, + REQ_STATUS_RCVD, + REQ_STATUS_FLSHD, + REQ_STATUS_ERROR, +}; + +/** + * struct p9_req_t - request slots + * @status: status of this request slot + * @t_err: transport error + * @flush_tag: tag of request being flushed (for flush requests) + * @wq: wait_queue for the client to block on for this request + * @tc: the request fcall structure + * @rc: the response fcall structure + * @aux: transport specific data (provided for trans_fd migration) + * @req_list: link for higher level objects to chain requests + * + * Transport use an array to track outstanding requests + * instead of a list. While this may incurr overhead during initial + * allocation or expansion, it makes request lookup much easier as the + * tag id is a index into an array. (We use tag+1 so that we can accommodate + * the -1 tag for the T_VERSION request). + * This also has the nice effect of only having to allocate wait_queues + * once, instead of constantly allocating and freeing them. Its possible + * other resources could benefit from this scheme as well. + * + */ + +struct p9_req_t { + int status; + int t_err; + wait_queue_head_t *wq; + struct p9_fcall *tc; + struct p9_fcall *rc; + void *aux; + + struct list_head req_list; +}; + /** * struct p9_client - per client instance state * @lock: protect @fidlist * @msize: maximum data size negotiated by protocol * @dotu: extension flags negotiated by protocol + * @proto_version: 9P protocol version to use * @trans_mod: module API instantiated with this client * @trans: tranport instance state and API - * @conn: connection state information used by trans_fd * @fidpool: fid handle accounting for session * @fidlist: List of active fid handles + * @tagpool - transaction id accounting for session + * @reqs - 2D array of requests + * @max_tag - current maximum tag id allocated + * @name - node name used as client id * * The client structure is used to keep track of various per-client * state that has been instantiated. + * In order to minimize per-transaction overhead we use a + * simple array to lookup requests instead of a hash table + * or linked list. In order to support larger number of + * transactions, we make this a 2D array, allocating new rows + * when we need to grow the total number of the transactions. + * + * Each row is 256 requests and we'll support up to 256 rows for + * a total of 64k concurrent requests per session. * * Bugs: duplicated data and potentially unnecessary elements. */ struct p9_client { spinlock_t lock; /* protect client structure */ - int msize; - unsigned char dotu; + unsigned int msize; + unsigned char proto_version; struct p9_trans_module *trans_mod; - struct p9_trans *trans; - struct p9_conn *conn; + enum p9_trans_status status; + void *trans; struct p9_idpool *fidpool; struct list_head fidlist; + + struct p9_idpool *tagpool; + struct p9_req_t *reqs[P9_ROW_MAXTAG]; + int max_tag; + + char name[__NEW_UTS_LEN + 1]; }; /** @@ -63,10 +175,7 @@ struct p9_client { * @qid: the &p9_qid server identifier this handle points to * @iounit: the server reported maximum transaction size for this file * @uid: the numeric uid of the local user who owns this handle - * @aux: transport specific information (unused?) - * @rdir_fpos: tracks offset of file position when reading directory contents - * @rdir_pos: (unused?) - * @rdir_fcall: holds response of last directory read request + * @rdir: readdir accounting structure (allocated on demand) * @flist: per-client-instance fid tracking * @dlist: per-dentry fid tracking * @@ -79,39 +188,85 @@ struct p9_fid { int mode; struct p9_qid qid; u32 iounit; - uid_t uid; - void *aux; + kuid_t uid; + + void *rdir; - int rdir_fpos; - int rdir_pos; - struct p9_fcall *rdir_fcall; struct list_head flist; - struct list_head dlist; /* list of all fids attached to a dentry */ + struct hlist_node dlist; /* list of all fids attached to a dentry */ }; +/** + * struct p9_dirent - directory entry structure + * @qid: The p9 server qid for this dirent + * @d_off: offset to the next dirent + * @d_type: type of file + * @d_name: file name + */ + +struct p9_dirent { + struct p9_qid qid; + u64 d_off; + unsigned char d_type; + char d_name[256]; +}; + +int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb); +int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, + const char *name); +int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name, + struct p9_fid *newdirfid, const char *new_name); struct p9_client *p9_client_create(const char *dev_name, char *options); void p9_client_destroy(struct p9_client *clnt); void p9_client_disconnect(struct p9_client *clnt); +void p9_client_begin_disconnect(struct p9_client *clnt); struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, - char *uname, u32 n_uname, char *aname); -struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname, - u32 n_uname, char *aname); -struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, - int clone); + char *uname, kuid_t n_uname, char *aname); +struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, + char **wnames, int clone); int p9_client_open(struct p9_fid *fid, int mode); int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, char *extension); +int p9_client_link(struct p9_fid *fid, struct p9_fid *oldfid, char *newname); +int p9_client_symlink(struct p9_fid *fid, char *name, char *symname, kgid_t gid, + struct p9_qid *qid); +int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, + kgid_t gid, struct p9_qid *qid); int p9_client_clunk(struct p9_fid *fid); +int p9_client_fsync(struct p9_fid *fid, int datasync); int p9_client_remove(struct p9_fid *fid); -int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count); -int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count); -int p9_client_write(struct p9_fid *fid, char *data, u64 offset, u32 count); -int p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset, - u32 count); -int p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset, - u32 count); -struct p9_stat *p9_client_stat(struct p9_fid *fid); +int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags); +int p9_client_read(struct p9_fid *fid, char *data, char __user *udata, + u64 offset, u32 count); +int p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, + u64 offset, u32 count); +int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset); +int p9dirent_read(struct p9_client *clnt, char *buf, int len, + struct p9_dirent *dirent); +struct p9_wstat *p9_client_stat(struct p9_fid *fid); int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst); -struct p9_stat *p9_client_dirread(struct p9_fid *fid, u64 offset); +int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *attr); + +struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, + u64 request_mask); + +int p9_client_mknod_dotl(struct p9_fid *oldfid, char *name, int mode, + dev_t rdev, kgid_t gid, struct p9_qid *); +int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, + kgid_t gid, struct p9_qid *); +int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status); +int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *fl); +struct p9_req_t *p9_tag_lookup(struct p9_client *, u16); +void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status); + +int p9_parse_header(struct p9_fcall *, int32_t *, int8_t *, int16_t *, int); +int p9stat_read(struct p9_client *, char *, int, struct p9_wstat *); +void p9stat_free(struct p9_wstat *); + +int p9_is_proto_dotu(struct p9_client *clnt); +int p9_is_proto_dotl(struct p9_client *clnt); +struct p9_fid *p9_client_xattrwalk(struct p9_fid *, const char *, u64 *); +int p9_client_xattrcreate(struct p9_fid *, const char *, u64, int); +int p9_client_readlink(struct p9_fid *fid, char **target); #endif /* NET_9P_CLIENT_H */ diff --git a/include/net/9p/transport.h b/include/net/9p/transport.h index 0db3a4038dc..d9fa68f26c4 100644 --- a/include/net/9p/transport.h +++ b/include/net/9p/transport.h @@ -26,63 +26,28 @@ #ifndef NET_9P_TRANSPORT_H #define NET_9P_TRANSPORT_H -/** - * enum p9_trans_status - different states of underlying transports - * @Connected: transport is connected and healthy - * @Disconnected: transport has been disconnected - * @Hung: transport is connected by wedged - * - * This enumeration details the various states a transport - * instatiation can be in. - */ - -enum p9_trans_status { - Connected, - Disconnected, - Hung, -}; - -/** - * struct p9_trans - per-transport state and API - * @status: transport &p9_trans_status - * @msize: negotiated maximum packet size (duplicate from client) - * @extended: negotiated protocol extensions (duplicate from client) - * @priv: transport private data - * @close: member function to disconnect and close the transport - * @rpc: member function to issue a request to the transport - * - * This is the basic API for a transport instance. It is used as - * a handle by the client to issue requests. This interface is currently - * in flux during reorganization. - * - * Bugs: there is lots of duplicated data here and its not clear that - * the member functions need to be per-instance versus per transport - * module. - */ - -struct p9_trans { - enum p9_trans_status status; - int msize; - unsigned char extended; - void *priv; - void (*close) (struct p9_trans *); - int (*rpc) (struct p9_trans *t, struct p9_fcall *tc, - struct p9_fcall **rc); -}; +#define P9_DEF_MIN_RESVPORT (665U) +#define P9_DEF_MAX_RESVPORT (1023U) /** * struct p9_trans_module - transport module interface * @list: used to maintain a list of currently available transports * @name: the human-readable name of the transport * @maxsize: transport provided maximum packet size + * @pref: Preferences of this transport * @def: set if this transport should be considered the default * @create: member function to create a new connection on this transport + * @close: member function to discard a connection on this transport + * @request: member function to issue a request to the transport + * @cancel: member function to cancel a request (if it hasn't been sent) + * @cancelled: member function to notify that a cancelled request will not + * not receive a reply * * This is the basic API for a transport module which is registered by the * transport module with the 9P core network module and used by the client * to instantiate a new connection on a transport. * - * Bugs: the transport module list isn't protected. + * The transport module list is protected by v9fs_trans_lock. */ struct p9_trans_module { @@ -90,10 +55,19 @@ struct p9_trans_module { char *name; /* name of transport */ int maxsize; /* max message size of transport */ int def; /* this transport should be default */ - struct p9_trans * (*create)(const char *, char *, int, unsigned char); + struct module *owner; + int (*create)(struct p9_client *, const char *, char *); + void (*close) (struct p9_client *); + int (*request) (struct p9_client *, struct p9_req_t *req); + int (*cancel) (struct p9_client *, struct p9_req_t *req); + int (*cancelled)(struct p9_client *, struct p9_req_t *req); + int (*zc_request)(struct p9_client *, struct p9_req_t *, + char *, char *, int , int, int, int); }; void v9fs_register_trans(struct p9_trans_module *m); -struct p9_trans_module *v9fs_match_trans(const substring_t *name); -struct p9_trans_module *v9fs_default_trans(void); +void v9fs_unregister_trans(struct p9_trans_module *m); +struct p9_trans_module *v9fs_get_trans_by_name(char *s); +struct p9_trans_module *v9fs_get_default_trans(void); +void v9fs_put_trans(struct p9_trans_module *m); #endif /* NET_9P_TRANSPORT_H */ |