fs.c revision 1.2
1 /* $NetBSD: fs.c,v 1.2 2007/05/05 15:49:51 pooka 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: fs.c,v 1.2 2007/05/05 15:49:51 pooka Exp $"); 31 #endif /* !lint */ 32 33 #include <err.h> 34 #include <errno.h> 35 #include <puffs.h> 36 #include <signal.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <unistd.h> 40 41 #include "ninepuffs.h" 42 #include "nineproto.h" 43 44 #define DO_IO(fname, a1, a2, a3, a4, rv) \ 45 puffs_framebuf_seekset(a2, 0); \ 46 *(a4) = 0; \ 47 rv = fname(a1, a2, a3, a4); \ 48 if (rv || a4 == 0) errx(1, "p9p_handshake_ io failed %d, %d", rv, *a4) 49 50 struct puffs_node * 51 p9p_handshake(struct puffs_usermount *pu, const char *username) 52 { 53 struct puffs9p *p9p = puffs_getspecific(pu); 54 struct puffs_framebuf *pb; 55 struct puffs_node *pn; 56 struct vattr rootva; 57 uint32_t maxreq; 58 uint16_t dummy; 59 p9ptag_t tagid, rtagid; 60 uint8_t type; 61 int rv, done, x = 1; 62 63 /* send initial handshake */ 64 pb = p9pbuf_makeout(); 65 p9pbuf_put_1(pb, P9PROTO_T_VERSION); 66 p9pbuf_put_2(pb, P9PROTO_NOTAG); 67 p9pbuf_put_4(pb, p9p->maxreq); 68 p9pbuf_put_str(pb, P9PROTO_VERSION); 69 DO_IO(p9pbuf_write, pu, pb, p9p->servsock, &done, rv); 70 71 puffs_framebuf_recycle(pb); 72 DO_IO(p9pbuf_read, pu, pb, p9p->servsock, &done, rv); 73 74 if ((type = p9pbuf_get_type(pb)) != P9PROTO_R_VERSION) 75 errx(1, "server invalid response to Tversion: %d", type); 76 if ((rtagid = p9pbuf_get_tag(pb)) != P9PROTO_NOTAG) { 77 errx(1, "server invalid tag: %d vs. %d\n", 78 P9PROTO_NOTAG, tagid); 79 return NULL; 80 } 81 if (p9pbuf_get_4(pb, &maxreq)) 82 errx(1, "server invalid response: no request length"); 83 if (maxreq < P9P_MINREQLEN) 84 errx(1, "server request length below minimum accepted: " 85 "%d vs. %d", P9P_MINREQLEN, maxreq); 86 p9p->maxreq = maxreq; 87 88 /* tell the server we don't support authentication */ 89 p9pbuf_recycleout(pb); 90 tagid = NEXTTAG(p9p); 91 p9pbuf_put_1(pb, P9PROTO_T_AUTH); 92 p9pbuf_put_2(pb, tagid); 93 p9pbuf_put_4(pb, P9PROTO_NOFID); 94 p9pbuf_put_str(pb, username); 95 p9pbuf_put_str(pb, ""); 96 DO_IO(p9pbuf_write, pu, pb, p9p->servsock, &done, rv); 97 98 puffs_framebuf_recycle(pb); 99 DO_IO(p9pbuf_read, pu, pb, p9p->servsock, &done, rv); 100 101 /* assume all Rerror is "no auth" */ 102 if (p9pbuf_get_type(pb) != P9PROTO_R_ERROR) 103 errx(1, "mount_9p supports only NO auth"); 104 if ((rtagid = p9pbuf_get_tag(pb)) != tagid) 105 errx(1, "server invalid tag: %d vs. %d\n", tagid, rtagid); 106 107 /* build attach message */ 108 p9pbuf_recycleout(pb); 109 tagid = NEXTTAG(p9p); 110 p9pbuf_put_1(pb, P9PROTO_T_ATTACH); 111 p9pbuf_put_2(pb, tagid); 112 p9pbuf_put_4(pb, P9P_ROOTFID); 113 p9pbuf_put_4(pb, P9PROTO_NOFID); 114 p9pbuf_put_str(pb, username); 115 p9pbuf_put_str(pb, ""); 116 DO_IO(p9pbuf_write, pu, pb, p9p->servsock, &done, rv); 117 118 puffs_framebuf_recycle(pb); 119 DO_IO(p9pbuf_read, pu, pb, p9p->servsock, &done, rv); 120 121 if ((type = p9pbuf_get_type(pb)) != P9PROTO_R_ATTACH) 122 errx(1, "Rattach not received, got %d", type); 123 if ((rtagid = p9pbuf_get_tag(pb)) != tagid) 124 errx(1, "server invalid tag: %d vs. %d\n", tagid, rtagid); 125 126 /* finally, stat the rootnode */ 127 p9pbuf_recycleout(pb); 128 tagid = NEXTTAG(p9p); 129 p9pbuf_put_1(pb, P9PROTO_T_STAT); 130 p9pbuf_put_2(pb, tagid); 131 p9pbuf_put_4(pb, P9P_ROOTFID); 132 DO_IO(p9pbuf_write, pu, pb, p9p->servsock, &done, rv); 133 134 puffs_framebuf_recycle(pb); 135 DO_IO(p9pbuf_read, pu, pb, p9p->servsock, &done, rv); 136 137 if ((type = p9pbuf_get_type(pb)) != P9PROTO_R_STAT) 138 errx(1, "Rstat not received, got %d", type); 139 if ((rtagid = p9pbuf_get_tag(pb)) != tagid) 140 errx(1, "server invalid tag: %d vs. %d\n", tagid, rtagid); 141 if (p9pbuf_get_2(pb, &dummy)) 142 errx(1, "couldn't get stat len parameter"); 143 if (proto_getstat(pb, &rootva, NULL, NULL)) 144 errx(1, "could not parse root attributes"); 145 puffs_framebuf_destroy(pb); 146 147 rootva.va_nlink = 0156; /* guess, will be fixed with first readdir */ 148 pn = newp9pnode_va(pu, &rootva, P9P_ROOTFID); 149 150 if (ioctl(p9p->servsock, FIONBIO, &x) == -1) 151 err(1, "cannot set socket in nonblocking mode"); 152 153 return pn; 154 } 155 156 int 157 puffs9p_fs_unmount(struct puffs_cc *pcc, int flags, pid_t pid) 158 { 159 struct puffs_usermount *pu = puffs_cc_getusermount(pcc); 160 struct puffs9p *p9p = puffs_getspecific(pu); 161 162 close(p9p->servsock); 163 return 0; 164 } 165
Indexes created Mon Sep 29 21:09:56 GMT 2025