nineproto.c revision 1.10
1 /* $NetBSD: nineproto.c,v 1.10 2019/05/17 08:48:04 ozaki-r Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #ifndef lint 30 __RCSID("$NetBSD: nineproto.c,v 1.10 2019/05/17 08:48:04 ozaki-r Exp $"); 31 #endif /* !lint */ 32 33 #include <sys/types.h> 34 35 #include <errno.h> 36 #include <grp.h> 37 #include <pwd.h> 38 #include <puffs.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 42 #include "ninepuffs.h" 43 #include "nineproto.h" 44 45 int 46 proto_getqid(struct puffs_framebuf *pb, struct qid9p *qid) 47 { 48 49 if (puffs_framebuf_remaining(pb) < 1+4+8) 50 return ENOBUFS; 51 52 p9pbuf_get_1(pb, &qid->qidtype); 53 p9pbuf_get_4(pb, &qid->qidvers); 54 p9pbuf_get_8(pb, &qid->qidpath); 55 56 return 0; 57 } 58 59 static uid_t 60 ustr2uid(char *uid) 61 { 62 struct passwd *pw; 63 64 pw = getpwnam(uid); 65 if (pw == NULL) 66 return 0; /* XXXXX */ 67 68 return pw->pw_uid; 69 } 70 71 static gid_t 72 gstr2gid(char *gid) 73 { 74 struct group *grr; 75 76 grr = getgrnam(gid); 77 if (grr == NULL) 78 return 0; /* more XXXX */ 79 80 return grr->gr_gid; 81 } 82 83 static const char * 84 uid2ustr(uid_t uid) 85 { 86 struct passwd *pw; 87 88 pw = getpwuid(uid); 89 if (pw == NULL) 90 return "root"; /* XXXXX */ 91 92 return pw->pw_name; 93 } 94 95 static const char * 96 gid2gstr(gid_t gid) 97 { 98 struct group *grr; 99 100 grr = getgrgid(gid); 101 if (grr == NULL) 102 return "wheel"; /* XXXXXX */ 103 104 return grr->gr_name; 105 } 106 107 #define GETFIELD(a,b,unitsize) \ 108 do { \ 109 if (size < unitsize) return EPROTO; \ 110 if ((rv = (a(pb, b)))) return rv; \ 111 size -= unitsize; \ 112 } while (/*CONSTCOND*/0) 113 #define GETSTR(val,strsize) \ 114 do { \ 115 if ((rv = p9pbuf_get_str(pb, val, strsize))) return rv; \ 116 if (*strsize > size) return EPROTO; \ 117 size -= *strsize; \ 118 } while (/*CONSTCOND*/0) 119 int 120 proto_getstat(struct puffs_usermount *pu, struct puffs_framebuf *pb, struct vattr *vap, 121 char **name, uint16_t *rs) 122 { 123 struct puffs9p *p9p = puffs_getspecific(pu); 124 char *uid, *gid; 125 struct qid9p qid; 126 uint64_t flen; 127 uint32_t rdev, mode, atime, mtime; 128 uint16_t size, v16; 129 int rv; 130 131 /* check size */ 132 if ((rv = p9pbuf_get_2(pb, &size))) 133 return rv; 134 if (puffs_framebuf_remaining(pb) < size) 135 return ENOBUFS; 136 137 if (rs) 138 *rs = size+2; /* compensate for size field itself */ 139 140 GETFIELD(p9pbuf_get_2, &v16, 2); 141 if (v16) 142 printf("%d\n", v16); 143 GETFIELD(p9pbuf_get_4, &rdev, 4); 144 GETFIELD(proto_getqid, &qid, 13); 145 GETFIELD(p9pbuf_get_4, &mode, 4); 146 GETFIELD(p9pbuf_get_4, &atime, 4); 147 GETFIELD(p9pbuf_get_4, &mtime, 4); 148 GETFIELD(p9pbuf_get_8, &flen, 8); 149 GETSTR(name, &v16); 150 GETSTR(&uid, &v16); 151 GETSTR(&gid, &v16); 152 153 if (rdev) 154 printf("%d\n", rdev); 155 vap->va_rdev = rdev; 156 vap->va_mode = mode & 0777; /* may contain other uninteresting bits */ 157 vap->va_atime.tv_sec = atime; 158 vap->va_mtime.tv_sec = mtime; 159 vap->va_ctime.tv_sec = mtime; 160 vap->va_atime.tv_nsec=vap->va_mtime.tv_nsec=vap->va_ctime.tv_nsec = 0; 161 vap->va_birthtime.tv_sec = vap->va_birthtime.tv_nsec = 0; 162 vap->va_size = vap->va_bytes = flen; 163 vap->va_uid = ustr2uid(uid); 164 vap->va_gid = gstr2gid(gid); 165 free(uid); 166 free(gid); 167 qid2vattr(vap, &qid); 168 169 /* some defaults */ 170 if (vap->va_type == VDIR) 171 vap->va_nlink = 1906; 172 else 173 vap->va_nlink = 1; 174 vap->va_blocksize = 512; 175 vap->va_flags = vap->va_vaflags = 0; 176 vap->va_filerev = PUFFS_VNOVAL; 177 178 /* muid, not used */ 179 GETSTR(NULL, &v16); 180 if (p9p->protover == P9PROTO_VERSION_U) { 181 uint32_t dummy; 182 GETSTR(NULL, &v16); /* extention[s], not used */ 183 GETFIELD(p9pbuf_get_4, &dummy, 4); /* n_uid[4], not used */ 184 GETFIELD(p9pbuf_get_4, &dummy, 4); /* n_gid[4], not used */ 185 GETFIELD(p9pbuf_get_4, &dummy, 4); /* n_muid[4], not used */ 186 } 187 188 return 0; 189 } 190 191 int 192 proto_cc_dupfid(struct puffs_usermount *pu, p9pfid_t oldfid, p9pfid_t newfid) 193 { 194 struct puffs_cc *pcc = puffs_cc_getcc(pu); 195 struct puffs9p *p9p = puffs_getspecific(pu); 196 struct puffs_framebuf *pb; 197 p9ptag_t tag = NEXTTAG(p9p); 198 uint16_t qids; 199 int rv = 0; 200 201 pb = p9pbuf_makeout(); 202 p9pbuf_put_1(pb, P9PROTO_T_WALK); 203 p9pbuf_put_2(pb, tag); 204 p9pbuf_put_4(pb, oldfid); 205 p9pbuf_put_4(pb, newfid); 206 p9pbuf_put_2(pb, 0); 207 GETRESPONSE(pb); 208 209 rv = proto_expect_walk_nqids(pb, &qids); 210 if (rv == 0 && qids != 0) 211 rv = EPROTO; 212 213 out: 214 puffs_framebuf_destroy(pb); 215 return rv; 216 } 217 218 int 219 proto_cc_clunkfid(struct puffs_usermount *pu, p9pfid_t fid, int waitforit) 220 { 221 struct puffs_cc *pcc = puffs_cc_getcc(pu); 222 struct puffs9p *p9p = puffs_getspecific(pu); 223 struct puffs_framebuf *pb; 224 p9ptag_t tag = NEXTTAG(p9p); 225 int rv = 0; 226 227 pb = p9pbuf_makeout(); 228 p9pbuf_put_1(pb, P9PROTO_T_CLUNK); 229 p9pbuf_put_2(pb, tag); 230 p9pbuf_put_4(pb, fid); 231 232 if (waitforit) { 233 if (puffs_framev_enqueue_cc(pcc, p9p->servsock, pb, 0) == 0) { 234 if (p9pbuf_get_type(pb) != P9PROTO_R_CLUNK) 235 rv = EPROTO; 236 } else { 237 rv = errno; 238 } 239 puffs_framebuf_destroy(pb); 240 } else { 241 JUSTSEND(pb); 242 } 243 244 out: 245 return rv; 246 } 247 248 /* 249 * walk a new fid, then open it 250 */ 251 int 252 proto_cc_open(struct puffs_usermount *pu, p9pfid_t fid, 253 p9pfid_t newfid, int mode) 254 { 255 struct puffs_cc *pcc = puffs_cc_getcc(pu); 256 struct puffs9p *p9p = puffs_getspecific(pu); 257 struct puffs_framebuf *pb; 258 p9ptag_t tag = NEXTTAG(p9p); 259 int rv; 260 261 rv = proto_cc_dupfid(pu, fid, newfid); 262 if (rv) 263 return rv; 264 265 pb = p9pbuf_makeout(); 266 p9pbuf_put_1(pb, P9PROTO_T_OPEN); 267 p9pbuf_put_2(pb, tag); 268 p9pbuf_put_4(pb, newfid); 269 p9pbuf_put_1(pb, mode); 270 GETRESPONSE(pb); 271 if (p9pbuf_get_type(pb) != P9PROTO_R_OPEN) 272 rv = EPROTO; 273 274 out: 275 puffs_framebuf_destroy(pb); 276 return rv; 277 } 278 279 void 280 proto_make_stat(struct puffs_usermount *pu, struct puffs_framebuf *pb, 281 const struct vattr *vap, const char *filename, enum vtype vt) 282 { 283 struct puffs9p *p9p = puffs_getspecific(pu); 284 struct vattr fakeva; 285 uint32_t mode, atime, mtime; 286 uint64_t flen; 287 const char *owner, *group; 288 int startoff, curoff; 289 290 if (vap == NULL) { 291 puffs_vattr_null(&fakeva); 292 vap = &fakeva; 293 } 294 295 startoff = puffs_framebuf_telloff(pb); 296 puffs_framebuf_seekset(pb, startoff + 2+2); /* stat[n] incl. stat[2] */ 297 298 if (vap->va_mode != (mode_t)PUFFS_VNOVAL) 299 mode = vap->va_mode | (vt == VDIR ? P9PROTO_CPERM_DIR : 0); 300 else 301 mode = P9PROTO_STAT_NOVAL4; 302 if (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) 303 atime = vap->va_atime.tv_sec; 304 else 305 atime = P9PROTO_STAT_NOVAL4; 306 if (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) 307 mtime = vap->va_mtime.tv_sec; 308 else 309 mtime = P9PROTO_STAT_NOVAL4; 310 if (vap->va_size != (u_quad_t)PUFFS_VNOVAL) 311 flen = vap->va_size; 312 else 313 flen = P9PROTO_STAT_NOVAL8; 314 if (vap->va_uid != (uid_t)PUFFS_VNOVAL) 315 owner = uid2ustr(vap->va_uid); 316 else 317 owner = ""; 318 if (vap->va_gid != (gid_t)PUFFS_VNOVAL) 319 group = gid2gstr(vap->va_gid); 320 else 321 group = ""; 322 323 p9pbuf_put_2(pb, P9PROTO_STAT_NOVAL2); /* kernel type */ 324 p9pbuf_put_4(pb, P9PROTO_STAT_NOVAL4); /* dev */ 325 p9pbuf_put_1(pb, P9PROTO_STAT_NOVAL1); /* type */ 326 p9pbuf_put_4(pb, P9PROTO_STAT_NOVAL4); /* version */ 327 p9pbuf_put_8(pb, P9PROTO_STAT_NOVAL8); /* path */ 328 p9pbuf_put_4(pb, mode); 329 p9pbuf_put_4(pb, atime); 330 p9pbuf_put_4(pb, mtime); 331 p9pbuf_put_8(pb, flen); 332 p9pbuf_put_str(pb, filename ? filename : ""); 333 p9pbuf_put_str(pb, owner); 334 p9pbuf_put_str(pb, group); 335 p9pbuf_put_str(pb, ""); /* muid */ 336 if (p9p->protover == P9PROTO_VERSION_U) { 337 p9pbuf_put_str(pb, P9PROTO_STAT_NOSTR); /* extentions[s] */ 338 p9pbuf_put_4(pb, P9PROTO_STAT_NOVAL4); /* n_uid[4] */ 339 p9pbuf_put_4(pb, P9PROTO_STAT_NOVAL4); /* n_gid[4] */ 340 p9pbuf_put_4(pb, P9PROTO_STAT_NOVAL4); /* n_muid[4] */ 341 } 342 343 curoff = puffs_framebuf_telloff(pb); 344 puffs_framebuf_seekset(pb, startoff); 345 p9pbuf_put_2(pb, curoff-(startoff+2)); /* stat[n] size */ 346 p9pbuf_put_2(pb, curoff-(startoff+4)); /* size[2] stat */ 347 348 puffs_framebuf_seekset(pb, curoff); 349 } 350 351 int 352 proto_expect_walk_nqids(struct puffs_framebuf *pb, uint16_t *nqids) 353 { 354 355 if (p9pbuf_get_type(pb) != P9PROTO_R_WALK) 356 return EPROTO; 357 return p9pbuf_get_2(pb, nqids); 358 } 359 360 int 361 proto_expect_qid(struct puffs_framebuf *pb, uint8_t op, struct qid9p *qid) 362 { 363 364 if (p9pbuf_get_type(pb) != op) 365 return EPROTO; 366 return proto_getqid(pb, qid); 367 } 368 369 int 370 proto_expect_stat(struct puffs_usermount *pu, struct puffs_framebuf *pb, 371 struct vattr *va) 372 { 373 uint16_t dummy; 374 int rv; 375 376 if (p9pbuf_get_type(pb) != P9PROTO_R_STAT) 377 return EPROTO; 378 if ((rv = p9pbuf_get_2(pb, &dummy))) 379 return rv; 380 return proto_getstat(pu, pb, va, NULL, NULL); 381 } 382
Indexes created Mon Sep 29 21:09:56 GMT 2025