net/9p/fcprint.c

   1 /*
   2  *  net/9p/fcprint.c
   3  *
   4  *  Print 9P call.
   5  *
   6  *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2
  10  *  as published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to:
  19  *  Free Software Foundation
  20  *  51 Franklin Street, Fifth Floor
  21  *  Boston, MA  02111-1301  USA
  22  *
  23  */
  24 #include <linux/module.h>
  25 #include <linux/errno.h>
  26 #include <linux/fs.h>
  27 #include <linux/idr.h>
  28 #include <net/9p/9p.h>
  29
  30 #ifdef CONFIG_NET_9P_DEBUG
  31
  32 static int
  33 p9_printqid(char *buf, int buflen, struct p9_qid *q)
  34 {
  35         int n;
  36         char b[10];
  37
  38         n = 0;
  39         if (q->type & P9_QTDIR)
  40                 b[n++] = 'd';
  41         if (q->type & P9_QTAPPEND)
  42                 b[n++] = 'a';
  43         if (q->type & P9_QTAUTH)
  44                 b[n++] = 'A';
  45         if (q->type & P9_QTEXCL)
  46                 b[n++] = 'l';
  47         if (q->type & P9_QTTMP)
  48                 b[n++] = 't';
  49         if (q->type & P9_QTSYMLINK)
  50                 b[n++] = 'L';
  51         b[n] = '\0';
  52
  53         return scnprintf(buf, buflen, "(%.16llx %x %s)",
  54                                         (long long int) q->path, q->version, b);
  55 }
  56
  57 static int
  58 p9_printperm(char *buf, int buflen, int perm)
  59 {
  60         int n;
  61         char b[15];
  62
  63         n = 0;
  64         if (perm & P9_DMDIR)
  65                 b[n++] = 'd';
  66         if (perm & P9_DMAPPEND)
  67                 b[n++] = 'a';
  68         if (perm & P9_DMAUTH)
  69                 b[n++] = 'A';
  70         if (perm & P9_DMEXCL)
  71                 b[n++] = 'l';
  72         if (perm & P9_DMTMP)
  73                 b[n++] = 't';
  74         if (perm & P9_DMDEVICE)
  75                 b[n++] = 'D';
  76         if (perm & P9_DMSOCKET)
  77                 b[n++] = 'S';
  78         if (perm & P9_DMNAMEDPIPE)
  79                 b[n++] = 'P';
  80         if (perm & P9_DMSYMLINK)
  81                 b[n++] = 'L';
  82         b[n] = '\0';
  83
  84         return scnprintf(buf, buflen, "%s%03o", b, perm&077);
  85 }
  86
  87 static int
  88 p9_printstat(char *buf, int buflen, struct p9_stat *st, int extended)
  89 {
  90         int n;
  91
  92         n = scnprintf(buf, buflen, "'%.*s' '%.*s'", st->name.len,
  93                 st->name.str, st->uid.len, st->uid.str);
  94         if (extended)
  95                 n += scnprintf(buf+n, buflen-n, "(%d)", st->n_uid);
  96
  97         n += scnprintf(buf+n, buflen-n, " '%.*s'", st->gid.len, st->gid.str);
  98         if (extended)
  99                 n += scnprintf(buf+n, buflen-n, "(%d)", st->n_gid);
 100
 101         n += scnprintf(buf+n, buflen-n, " '%.*s'", st->muid.len, st->muid.str);
 102         if (extended)
 103                 n += scnprintf(buf+n, buflen-n, "(%d)", st->n_muid);
 104
 105         n += scnprintf(buf+n, buflen-n, " q ");
 106         n += p9_printqid(buf+n, buflen-n, &st->qid);
 107         n += scnprintf(buf+n, buflen-n, " m ");
 108         n += p9_printperm(buf+n, buflen-n, st->mode);
 109         n += scnprintf(buf+n, buflen-n, " at %d mt %d l %lld",
 110                 st->atime, st->mtime, (long long int) st->length);
 111
 112         if (extended)
 113                 n += scnprintf(buf+n, buflen-n, " ext '%.*s'",
 114                         st->extension.len, st->extension.str);
 115
 116         return n;
 117 }
 118
 119 static int
 120 p9_dumpdata(char *buf, int buflen, u8 *data, int datalen)
 121 {
 122         int i, n;
 123
 124         i = n = 0;
 125         while (i < datalen) {
 126                 n += scnprintf(buf + n, buflen - n, "%02x", data[i]);
 127                 if (i%4 == 3)
 128                         n += scnprintf(buf + n, buflen - n, " ");
 129                 if (i%32 == 31)
 130                         n += scnprintf(buf + n, buflen - n, "\n");
 131
 132                 i++;
 133         }
 134         n += scnprintf(buf + n, buflen - n, "\n");
 135
 136         return n;
 137 }
 138
 139 static int
 140 p9_printdata(char *buf, int buflen, u8 *data, int datalen)
 141 {
 142         return p9_dumpdata(buf, buflen, data, datalen < 16?datalen:16);
 143 }
 144
 145 /**
 146  * p9_printfcall - decode and print a protocol structure into a buffer
 147  * @buf: buffer to deposit decoded structure into
 148  * @buflen: available space in buffer
 149  * @fc: protocol rpc structure of type &p9_fcall
 150  * @extended: whether or not session is operating with extended protocol
 151  */
 152
 153 int
 154 p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int extended)
 155 {
 156         int i, ret, type, tag;
 157
 158         if (!fc)
 159                 return scnprintf(buf, buflen, "<NULL>");
 160
 161         type = fc->id;
 162         tag = fc->tag;
 163
 164         ret = 0;
 165         switch (type) {
 166         case P9_TVERSION:
 167                 ret += scnprintf(buf+ret, buflen-ret,
 168                                 "Tversion tag %u msize %u version '%.*s'", tag,
 169                                 fc->params.tversion.msize,
 170                                 fc->params.tversion.version.len,
 171                                 fc->params.tversion.version.str);
 172                 break;
 173
 174         case P9_RVERSION:
 175                 ret += scnprintf(buf+ret, buflen-ret,
 176                                 "Rversion tag %u msize %u version '%.*s'", tag,
 177                                 fc->params.rversion.msize,
 178                                 fc->params.rversion.version.len,
 179                                 fc->params.rversion.version.str);
 180                 break;
 181
 182         case P9_TAUTH:
 183                 ret += scnprintf(buf+ret, buflen-ret,
 184                         "Tauth tag %u afid %d uname '%.*s' aname '%.*s'", tag,
 185                         fc->params.tauth.afid, fc->params.tauth.uname.len,
 186                         fc->params.tauth.uname.str, fc->params.tauth.aname.len,
 187                         fc->params.tauth.aname.str);
 188                 break;
 189
 190         case P9_RAUTH:
 191                 ret += scnprintf(buf+ret, buflen-ret, "Rauth tag %u qid ", tag);
 192                 p9_printqid(buf+ret, buflen-ret, &fc->params.rauth.qid);
 193                 break;
 194
 195         case P9_TATTACH:
 196                 ret += scnprintf(buf+ret, buflen-ret,
 197                  "Tattach tag %u fid %d afid %d uname '%.*s' aname '%.*s'", tag,
 198                  fc->params.tattach.fid, fc->params.tattach.afid,
 199                  fc->params.tattach.uname.len, fc->params.tattach.uname.str,
 200                  fc->params.tattach.aname.len, fc->params.tattach.aname.str);
 201                 break;
 202
 203         case P9_RATTACH:
 204                 ret += scnprintf(buf+ret, buflen-ret, "Rattach tag %u qid ",
 205                                                                         tag);
 206                 p9_printqid(buf+ret, buflen-ret, &fc->params.rattach.qid);
 207                 break;
 208
 209         case P9_RERROR:
 210                 ret += scnprintf(buf+ret, buflen-ret,
 211                                 "Rerror tag %u ename '%.*s'", tag,
 212                                 fc->params.rerror.error.len,
 213                                 fc->params.rerror.error.str);
 214                 if (extended)
 215                         ret += scnprintf(buf+ret, buflen-ret, " ecode %d\n",
 216                                 fc->params.rerror.errno);
 217                 break;
 218
 219         case P9_TFLUSH:
 220                 ret += scnprintf(buf+ret, buflen-ret, "Tflush tag %u oldtag %u",
 221                         tag, fc->params.tflush.oldtag);
 222                 break;
 223
 224         case P9_RFLUSH:
 225                 ret += scnprintf(buf+ret, buflen-ret, "Rflush tag %u", tag);
 226                 break;
 227
 228         case P9_TWALK:
 229                 ret += scnprintf(buf+ret, buflen-ret,
 230                         "Twalk tag %u fid %d newfid %d nwname %d", tag,
 231                         fc->params.twalk.fid, fc->params.twalk.newfid,
 232                         fc->params.twalk.nwname);
 233                 for (i = 0; i < fc->params.twalk.nwname; i++)
 234                         ret += scnprintf(buf+ret, buflen-ret, " '%.*s'",
 235                                 fc->params.twalk.wnames[i].len,
 236                                 fc->params.twalk.wnames[i].str);
 237                 break;
 238
 239         case P9_RWALK:
 240                 ret += scnprintf(buf+ret, buflen-ret, "Rwalk tag %u nwqid %d",
 241                         tag, fc->params.rwalk.nwqid);
 242                 for (i = 0; i < fc->params.rwalk.nwqid; i++)
 243                         ret += p9_printqid(buf+ret, buflen-ret,
 244                                 &fc->params.rwalk.wqids[i]);
 245                 break;
 246
 247         case P9_TOPEN:
 248                 ret += scnprintf(buf+ret, buflen-ret,
 249                         "Topen tag %u fid %d mode %d", tag,
 250                         fc->params.topen.fid, fc->params.topen.mode);
 251                 break;
 252
 253         case P9_ROPEN:
 254                 ret += scnprintf(buf+ret, buflen-ret, "Ropen tag %u", tag);
 255                 ret += p9_printqid(buf+ret, buflen-ret, &fc->params.ropen.qid);
 256                 ret += scnprintf(buf+ret, buflen-ret, " iounit %d",
 257                         fc->params.ropen.iounit);
 258                 break;
 259
 260         case P9_TCREATE:
 261                 ret += scnprintf(buf+ret, buflen-ret,
 262                         "Tcreate tag %u fid %d name '%.*s' perm ", tag,
 263                         fc->params.tcreate.fid, fc->params.tcreate.name.len,
 264                         fc->params.tcreate.name.str);
 265
 266                 ret += p9_printperm(buf+ret, buflen-ret,
 267                                                 fc->params.tcreate.perm);
 268                 ret += scnprintf(buf+ret, buflen-ret, " mode %d",
 269                         fc->params.tcreate.mode);
 270                 break;
 271
 272         case P9_RCREATE:
 273                 ret += scnprintf(buf+ret, buflen-ret, "Rcreate tag %u", tag);
 274                 ret += p9_printqid(buf+ret, buflen-ret,
 275                                                 &fc->params.rcreate.qid);
 276                 ret += scnprintf(buf+ret, buflen-ret, " iounit %d",
 277                         fc->params.rcreate.iounit);
 278                 break;
 279
 280         case P9_TREAD:
 281                 ret += scnprintf(buf+ret, buflen-ret,
 282                         "Tread tag %u fid %d offset %lld count %u", tag,
 283                         fc->params.tread.fid,
 284                         (long long int) fc->params.tread.offset,
 285                         fc->params.tread.count);
 286                 break;
 287
 288         case P9_RREAD:
 289                 ret += scnprintf(buf+ret, buflen-ret,
 290                         "Rread tag %u count %u data ", tag,
 291                         fc->params.rread.count);
 292                 ret += p9_printdata(buf+ret, buflen-ret, fc->params.rread.data,
 293                         fc->params.rread.count);
 294                 break;
 295
 296         case P9_TWRITE:
 297                 ret += scnprintf(buf+ret, buflen-ret,
 298                         "Twrite tag %u fid %d offset %lld count %u data ",
 299                         tag, fc->params.twrite.fid,
 300                         (long long int) fc->params.twrite.offset,
 301                         fc->params.twrite.count);
 302                 ret += p9_printdata(buf+ret, buflen-ret, fc->params.twrite.data,
 303                         fc->params.twrite.count);
 304                 break;
 305
 306         case P9_RWRITE:
 307                 ret += scnprintf(buf+ret, buflen-ret, "Rwrite tag %u count %u",
 308                         tag, fc->params.rwrite.count);
 309                 break;
 310
 311         case P9_TCLUNK:
 312                 ret += scnprintf(buf+ret, buflen-ret, "Tclunk tag %u fid %d",
 313                         tag, fc->params.tclunk.fid);
 314                 break;
 315
 316         case P9_RCLUNK:
 317                 ret += scnprintf(buf+ret, buflen-ret, "Rclunk tag %u", tag);
 318                 break;
 319
 320         case P9_TREMOVE:
 321                 ret += scnprintf(buf+ret, buflen-ret, "Tremove tag %u fid %d",
 322                         tag, fc->params.tremove.fid);
 323                 break;
 324
 325         case P9_RREMOVE:
 326                 ret += scnprintf(buf+ret, buflen-ret, "Rremove tag %u", tag);
 327                 break;
 328
 329         case P9_TSTAT:
 330                 ret += scnprintf(buf+ret, buflen-ret, "Tstat tag %u fid %d",
 331                         tag, fc->params.tstat.fid);
 332                 break;
 333
 334         case P9_RSTAT:
 335                 ret += scnprintf(buf+ret, buflen-ret, "Rstat tag %u ", tag);
 336                 ret += p9_printstat(buf+ret, buflen-ret, &fc->params.rstat.stat,
 337                         extended);
 338                 break;
 339
 340         case P9_TWSTAT:
 341                 ret += scnprintf(buf+ret, buflen-ret, "Twstat tag %u fid %d ",
 342                         tag, fc->params.twstat.fid);
 343                 ret += p9_printstat(buf+ret, buflen-ret,
 344                                         &fc->params.twstat.stat, extended);
 345                 break;
 346
 347         case P9_RWSTAT:
 348                 ret += scnprintf(buf+ret, buflen-ret, "Rwstat tag %u", tag);
 349                 break;
 350
 351         default:
 352                 ret += scnprintf(buf+ret, buflen-ret, "unknown type %d", type);
 353                 break;
 354         }
 355
 356         return ret;
 357 }
 358 #else
 359 int
 360 p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int extended)
 361 {
 362         return 0;
 363 }
 364 #endif /* CONFIG_NET_9P_DEBUG */
 365 EXPORT_SYMBOL(p9_printfcall);
 366