ninepuffs.h revision 1.2
1 /* $NetBSD: ninepuffs.h,v 1.2 2007/04/22 18:10:48 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 #ifndef PUFFS9P_H_ 29 #define PUFFS9P_H_ 30 31 #include <sys/queue.h> 32 33 #include <puffs.h> 34 35 PUFFSOP_PROTOS(puffs9p); 36 37 /* Qid structure. optimized for in-mem. different order on-wire */ 38 struct qid9p { 39 uint64_t qidpath; 40 uint32_t qidvers; 41 uint8_t qidtype; 42 }; 43 44 typedef uint16_t p9ptag_t; 45 typedef uint32_t p9pfid_t; 46 47 /* 48 * refuse (no, not *that* refuse) to play if the server doesn't 49 * support requests of at least the following size. It would only 50 * make life difficult 51 */ 52 #define P9P_MINREQLEN 512 53 54 #define P9P_DEFREQLEN (16*1024) 55 #define P9P_INVALFID 0 56 #define P9P_ROOTFID 1 57 58 #define NEXTTAG(p9p) \ 59 ((++(p9p->nexttag)) == P9PROTO_NOTAG ? p9p->nexttag = 0 : p9p->nexttag) 60 61 #define NEXTFID(p9p) \ 62 ((++(p9p->nextfid)) == P9P_INVALFID ? p9p->nextfid = 2 : p9p->nextfid) 63 64 #define AUTOVAR(pcc) \ 65 struct puffs9p *p9p = puffs_cc_getspecific(pcc); \ 66 uint16_t tag = NEXTTAG(p9p); \ 67 struct p9pbuf *pb = p9pbuf_make(p9p->maxreq, P9PB_OUT); \ 68 int rv = 0 69 70 #define RETURN(rv) \ 71 p9pbuf_destroy(pb); \ 72 return (rv) 73 74 struct puffs9p; 75 /* 76 * XXX: urgh 77 * 78 * This is slightly messy / abusatory structure. It is used for multiple 79 * things. Typical life cycle: create output buffer, append to output 80 * queue (pcc included) . Once the buffer has been sent, the buffer is 81 * freed and the structure is appended to reqqueue as psreq. It is kept 82 * there until matching network data is read. Once this happens, the 83 * data from the received buffer is copied to buffer stored on the queue. 84 * This should be rewritten, clearly. 85 * 86 * Also, this should not be copypasted from psshfs. But that's 87 * another matter ;) 88 */ 89 #define P9PB_OUT 0 90 #define P9PB_IN 1 91 struct p9pbuf { 92 struct p9preq { 93 p9ptag_t tagid; 94 95 /* either ... */ 96 struct puffs_cc *pcc; 97 98 /* ... or */ 99 void (*func)(struct puffs9p *, struct p9pbuf *, void *); 100 void *arg; 101 /* no union, we'd need a "which" flag */ 102 103 TAILQ_ENTRY(p9pbuf) entries; 104 } p9pr; 105 106 /* in / out */ 107 uint32_t len; 108 uint32_t offset; 109 uint8_t *buf; 110 111 /* helpers for in */ 112 uint32_t remain; 113 uint8_t type; 114 p9ptag_t tagid; 115 116 int state; 117 }; 118 #define P9PBUF_PUT 0 119 #define P9PBUF_PUTDONE 1 120 #define P9PBUF_GETLEN 2 121 #define P9PBUF_GETDATA 3 122 #define P9PBUF_GETREADY 4 123 124 #define P9PB_CHECK(pb, space) if (pb->remain < (space)) return ENOMEM 125 126 struct puffs9p { 127 int servsock; 128 129 p9ptag_t nexttag; 130 p9pfid_t nextfid; 131 132 size_t maxreq; /* negotiated with server */ 133 struct p9pbuf *curpb; 134 135 TAILQ_HEAD(, p9pbuf) outbufq; 136 TAILQ_HEAD(, p9pbuf) req_queue; 137 }; 138 139 struct dirfid { 140 p9pfid_t fid; 141 off_t seekoff; 142 LIST_ENTRY(dirfid) entries; 143 }; 144 145 struct p9pnode { 146 p9pfid_t fid_base; 147 p9pfid_t fid_read; 148 p9pfid_t fid_write; 149 int opencount; 150 151 LIST_HEAD(,dirfid) dir_openlist; 152 }; 153 154 struct p9pbuf *p9pbuf_make(size_t, int); 155 void p9pbuf_destroy(struct p9pbuf *); 156 void p9pbuf_recycle(struct p9pbuf *, int); 157 158 int p9pbuf_read(struct puffs9p *, struct p9pbuf *); 159 int p9pbuf_write(struct puffs9p *, struct p9pbuf *); 160 161 void outbuf_enqueue(struct puffs9p *, struct p9pbuf *, 162 struct puffs_cc *, uint16_t); 163 void outbuf_enqueue_nocc(struct puffs9p *, struct p9pbuf *, 164 void (*f)(struct puffs9p *, 165 struct p9pbuf *, void *), 166 void *, uint16_t); 167 struct p9pbuf *req_get(struct puffs9p *, uint16_t); 168 169 170 int p9pbuf_put_1(struct p9pbuf *, uint8_t); 171 int p9pbuf_put_2(struct p9pbuf *, uint16_t); 172 int p9pbuf_put_4(struct p9pbuf *, uint32_t); 173 int p9pbuf_put_8(struct p9pbuf *, uint64_t); 174 int p9pbuf_put_str(struct p9pbuf *, const char *); 175 int p9pbuf_put_data(struct p9pbuf *, const void *, uint16_t); 176 int p9pbuf_write_data(struct p9pbuf *, uint8_t *, uint32_t); 177 178 int p9pbuf_get_1(struct p9pbuf *, uint8_t *); 179 int p9pbuf_get_2(struct p9pbuf *, uint16_t *); 180 int p9pbuf_get_4(struct p9pbuf *, uint32_t *); 181 int p9pbuf_get_8(struct p9pbuf *, uint64_t *); 182 int p9pbuf_get_str(struct p9pbuf *, char **, uint16_t *); 183 int p9pbuf_get_data(struct p9pbuf *, uint8_t **, uint16_t *); 184 int p9pbuf_read_data(struct p9pbuf *, uint8_t *, uint32_t); 185 186 int p9pbuf_remaining(struct p9pbuf *); 187 int p9pbuf_tell(struct p9pbuf *); 188 void p9pbuf_seekset(struct p9pbuf *, int); 189 190 int proto_getqid(struct p9pbuf *, struct qid9p *); 191 int proto_getstat(struct p9pbuf *, struct vattr *, char **, uint16_t *); 192 int proto_expect_walk_nqids(struct p9pbuf *, uint16_t *); 193 int proto_expect_stat(struct p9pbuf *, struct vattr *); 194 int proto_expect_qid(struct p9pbuf *, uint8_t, struct qid9p *); 195 196 int proto_cc_dupfid(struct puffs_cc *, p9pfid_t, p9pfid_t); 197 int proto_cc_clunkfid(struct puffs_cc *, p9pfid_t, int); 198 int proto_cc_open(struct puffs_cc *, p9pfid_t, p9pfid_t, int); 199 200 void proto_make_stat(struct p9pbuf *, const struct vattr *, const char *); 201 202 struct puffs_node *p9p_handshake(struct puffs_usermount *, const char *); 203 204 void qid2vattr(struct vattr *, const struct qid9p *); 205 struct puffs_node *newp9pnode_va(struct puffs_usermount *, 206 const struct vattr *, p9pfid_t); 207 struct puffs_node *newp9pnode_qid(struct puffs_usermount *, 208 const struct qid9p *, p9pfid_t); 209 210 int getdfwithoffset(struct puffs_cc *, struct p9pnode *, off_t, 211 struct dirfid **); 212 void storedf(struct p9pnode *, struct dirfid *); 213 void releasedf(struct puffs_cc *, struct dirfid *); 214 void nukealldf(struct puffs_cc *, struct p9pnode *); 215 216 #endif /* PUFFS9P_H_ */ 217
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