psshfs.h revision 1.9
1 /* $NetBSD: psshfs.h,v 1.9 2007/04/12 20:42:46 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2006 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 * 3. The name of the company nor the name of the author may be used to 15 * endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 19 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #ifndef PSSHFS_H_ 32 #define PSSHFS_H_ 33 34 #include <sys/queue.h> 35 36 #include <puffs.h> 37 38 /* 39 * Later protocol versions would have some advantages (such as link count 40 * supported directly as a part of stat), but since proto version 3 seems 41 * to be the only widely available version, let's not try to jump through 42 * too many hoops to be compatible with all versions. 43 */ 44 #define SFTP_PROTOVERSION 3 45 46 /* 47 * Refresh directories every n seconds as indicated by the following macro. 48 * Note that local changes will still be visible immediately. 49 */ 50 #define PSSHFS_REFRESHIVAL 30 51 52 /* warm getattr cache in readdir */ 53 #define SUPERREADDIR 54 55 PUFFSOP_PROTOS(psshfs); 56 57 #define NEXTREQ(pctx) ((pctx->nextreq)++) 58 #define PSSHFSAUTOVAR(pcc) \ 59 struct puffs_usermount *pu = puffs_cc_getusermount(pcc); \ 60 struct psshfs_ctx *pctx = puffs_getspecific(pu); \ 61 uint32_t reqid = NEXTREQ(pctx); \ 62 struct psbuf *pb = psbuf_make(PSB_OUT); \ 63 int rv = 0 64 65 #define PSSHFSRETURN(rv) \ 66 psbuf_destroy(pb); \ 67 return (rv) 68 69 struct psshfs_dir { 70 int valid; 71 struct puffs_node *entry; 72 73 char *entryname; 74 struct vattr va; 75 time_t attrread; 76 }; 77 78 struct psshfs_fid { 79 time_t mounttime; 80 struct puffs_node *node; 81 }; 82 83 struct psshfs_node { 84 struct puffs_node *parent; 85 86 struct psshfs_dir *dir; /* only valid if we're of type VDIR */ 87 size_t denttot; 88 size_t dentnext; 89 time_t dentread; 90 int childcount; 91 int reclaimed; 92 int hasfh; 93 94 time_t attrread; 95 }; 96 97 struct psshfs_ctx; 98 /* 99 * XXX: urgh 100 * 101 * This is slightly messy / abusatory structure. It is used for multiple 102 * things. Typical life cycle: create output buffer, append to output 103 * queue (pcc included) . Once the buffer has been sent, the buffer is 104 * freed and the structure is appended to reqqueue as psreq. It is kept 105 * there until matching network data is read. Once this happens, the 106 * data from the received buffer is copied to buffer stored on the queue. 107 * This should be rewritten, clearly. 108 */ 109 #define PSDEFALLOC 0x2000 110 #define PSBUFMAX 0x40000 111 #define PSB_OUT 0 112 #define PSB_IN 1 113 struct psbuf { 114 struct psreq { 115 uint32_t reqid; 116 117 /* either ... */ 118 struct puffs_cc *pcc; 119 120 /* ... or */ 121 void (*func)(struct psshfs_ctx *, struct psbuf *, void *); 122 void *arg; 123 /* no union, we'd need a "which" flag */ 124 125 TAILQ_ENTRY(psbuf) entries; 126 } psr; 127 128 /* in / out */ 129 uint32_t len; 130 uint32_t remain; 131 uint32_t offset; 132 uint8_t *buf; 133 134 int state; 135 136 /* helpers for in */ 137 uint8_t type; /* buf[0] */ 138 uint32_t reqid; /* buf[1-4] */ 139 }; 140 #define PSBUF_PUT 0 141 #define PSBUF_PUTDONE 1 142 #define PSBUF_GETLEN 2 143 #define PSBUF_GETDATA 3 144 #define PSBUF_GETREADY 4 145 146 struct psshfs_ctx { 147 int sshfd; 148 pid_t sshpid; 149 const char *mountpath; 150 151 int protover; 152 uint32_t nextreq; 153 154 struct psbuf *curpb; 155 156 struct psshfs_node psn_root; 157 ino_t nextino; 158 159 int canexport; 160 time_t mounttime; 161 162 TAILQ_HEAD(, psbuf) outbufq; 163 TAILQ_HEAD(, psbuf) req_queue; 164 }; 165 166 int psshfs_domount(struct puffs_usermount *); 167 168 struct psbuf *psbuf_make(int); 169 void psbuf_destroy(struct psbuf *); 170 void psbuf_recycle(struct psbuf *, int); 171 172 int psbuf_read(struct psshfs_ctx *, struct psbuf *); 173 int psbuf_write(struct psshfs_ctx *, struct psbuf *); 174 175 void pssh_outbuf_enqueue(struct psshfs_ctx *, struct psbuf *, 176 struct puffs_cc *, uint32_t); 177 void pssh_outbuf_enqueue_nocc(struct psshfs_ctx *, struct psbuf *, 178 void (*f)(struct psshfs_ctx *, 179 struct psbuf *, void *), 180 void *, uint32_t); 181 struct psbuf *psshreq_get(struct psshfs_ctx *, uint32_t); 182 183 184 int psbuf_put_1(struct psbuf *, uint8_t); 185 int psbuf_put_2(struct psbuf *, uint16_t); 186 int psbuf_put_4(struct psbuf *, uint32_t); 187 int psbuf_put_8(struct psbuf *, uint64_t); 188 int psbuf_put_str(struct psbuf *, const char *); 189 int psbuf_put_data(struct psbuf *, const void *, uint32_t); 190 int psbuf_put_vattr(struct psbuf *, const struct vattr *); 191 192 int psbuf_get_1(struct psbuf *, uint8_t *); 193 int psbuf_get_2(struct psbuf *, uint16_t *); 194 int psbuf_get_4(struct psbuf *, uint32_t *); 195 int psbuf_get_8(struct psbuf *, uint64_t *); 196 int psbuf_get_str(struct psbuf *, char **, uint32_t *); 197 int psbuf_get_vattr(struct psbuf *, struct vattr *); 198 199 int psbuf_expect_status(struct psbuf *); 200 int psbuf_expect_handle(struct psbuf *, char **, uint32_t *); 201 int psbuf_expect_name(struct psbuf *, uint32_t *); 202 int psbuf_expect_attrs(struct psbuf *, struct vattr *); 203 204 int psbuf_do_data(struct psbuf *, uint8_t *, uint32_t *); 205 206 int psbuf_req_data(struct psbuf *, int, uint32_t, const void *, uint32_t); 207 int psbuf_req_str(struct psbuf *, int, uint32_t, const char *); 208 209 210 int sftp_readdir(struct puffs_cc *, struct psshfs_ctx *, 211 struct puffs_node *); 212 213 struct psshfs_dir *lookup(struct psshfs_dir *, size_t, const char *); 214 struct puffs_node *makenode(struct puffs_usermount *, struct puffs_node *, 215 struct psshfs_dir *, const struct vattr *); 216 struct puffs_node *allocnode(struct puffs_usermount *, struct puffs_node *, 217 const char *, const struct vattr *); 218 struct psshfs_dir *direnter(struct puffs_node *, const char *); 219 void nukenode(struct puffs_node *, const char *, int); 220 void doreclaim(struct puffs_node *); 221 int getpathattr(struct puffs_cc *, const char *, struct vattr *); 222 int getnodeattr(struct puffs_cc *, struct puffs_node *); 223 224 #endif /* PSSHFS_H_ */ 225
Indexes created Mon Sep 29 18:09:42 GMT 2025