subr.c revision 1.21
1 /* $NetBSD: subr.c,v 1.21 2007/11/30 19:02:29 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 * 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 #if !defined(lint) 30 __RCSID("$NetBSD: subr.c,v 1.21 2007/11/30 19:02:29 pooka Exp $"); 31 #endif /* !lint */ 32 33 #include <sys/types.h> 34 #include <sys/time.h> 35 #include <sys/vnode.h> 36 #include <sys/dirent.h> 37 38 #include <assert.h> 39 #include <errno.h> 40 #include <puffs.h> 41 #include <stdlib.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #include "puffs_priv.h" 47 48 int 49 puffs_gendotdent(struct dirent **dent, ino_t id, int dotdot, size_t *reslen) 50 { 51 const char *name; 52 53 assert(dotdot == 0 || dotdot == 1); 54 name = dotdot == 0 ? "." : ".."; 55 56 return puffs_nextdent(dent, name, id, DT_DIR, reslen); 57 } 58 59 int 60 puffs_nextdent(struct dirent **dent, const char *name, ino_t id, uint8_t dtype, 61 size_t *reslen) 62 { 63 struct dirent *d = *dent; 64 65 /* check if we have enough room for our dent-aligned dirent */ 66 if (_DIRENT_RECLEN(d, strlen(name)) > *reslen) 67 return 0; 68 69 d->d_fileno = id; 70 d->d_type = dtype; 71 d->d_namlen = (uint16_t)strlen(name); 72 (void)memcpy(&d->d_name, name, (size_t)d->d_namlen); 73 d->d_name[d->d_namlen] = '\0'; 74 d->d_reclen = (uint16_t)_DIRENT_SIZE(d); 75 76 *reslen -= d->d_reclen; 77 *dent = _DIRENT_NEXT(d); 78 79 return 1; 80 } 81 82 /*ARGSUSED*/ 83 int 84 puffs_fsnop_unmount(struct puffs_usermount *dontuse1, int dontuse2) 85 { 86 87 /* would you like to see puffs rule again, my friend? */ 88 return 0; 89 } 90 91 /*ARGSUSED*/ 92 int 93 puffs_fsnop_sync(struct puffs_usermount *dontuse1, int dontuse2, 94 const struct puffs_cred *dontuse3) 95 { 96 97 return 0; 98 } 99 100 /*ARGSUSED*/ 101 int 102 puffs_fsnop_statvfs(struct puffs_usermount *dontuse1, struct statvfs *sbp) 103 { 104 105 sbp->f_bsize = sbp->f_frsize = sbp->f_iosize = 512; 106 107 sbp->f_bfree=sbp->f_bavail=sbp->f_bresvd=sbp->f_blocks = (fsblkcnt_t)0; 108 sbp->f_ffree=sbp->f_favail=sbp->f_fresvd=sbp->f_files = (fsfilcnt_t)0; 109 110 return 0; 111 } 112 113 /* 114 * Just put the node, don't do anything else. Don't use this if 115 * your fs needs more cleanup. 116 */ 117 /*ARGSUSED2*/ 118 int 119 puffs_genfs_node_reclaim(struct puffs_usermount *pu, void *opc) 120 { 121 122 puffs_pn_put(PU_CMAP(pu, opc)); 123 124 return 0; 125 } 126 127 /* 128 * Just a wrapper to make calling the above nicer without having to pass 129 * NULLs from application code 130 */ 131 void 132 puffs_zerostatvfs(struct statvfs *sbp) 133 { 134 135 puffs_fsnop_statvfs(NULL, sbp); 136 } 137 138 /* 139 * Set vattr values for those applicable (i.e. not PUFFS_VNOVAL). 140 */ 141 void 142 puffs_setvattr(struct vattr *vap, const struct vattr *sva) 143 { 144 145 #define SETIFVAL(a, t) if (sva->a != (t)PUFFS_VNOVAL) vap->a = sva->a 146 if (sva->va_type != VNON) 147 vap->va_type = sva->va_type; 148 SETIFVAL(va_mode, mode_t); 149 SETIFVAL(va_nlink, nlink_t); 150 SETIFVAL(va_uid, uid_t); 151 SETIFVAL(va_gid, gid_t); 152 SETIFVAL(va_fsid, long); 153 SETIFVAL(va_size, u_quad_t); 154 SETIFVAL(va_fileid, ino_t); 155 SETIFVAL(va_blocksize, long); 156 SETIFVAL(va_atime.tv_sec, time_t); 157 SETIFVAL(va_ctime.tv_sec, time_t); 158 SETIFVAL(va_mtime.tv_sec, time_t); 159 SETIFVAL(va_birthtime.tv_sec, time_t); 160 SETIFVAL(va_atime.tv_nsec, long); 161 SETIFVAL(va_ctime.tv_nsec, long); 162 SETIFVAL(va_mtime.tv_nsec, long); 163 SETIFVAL(va_birthtime.tv_nsec, long); 164 SETIFVAL(va_gen, u_long); 165 SETIFVAL(va_flags, u_long); 166 SETIFVAL(va_rdev, dev_t); 167 SETIFVAL(va_bytes, u_quad_t); 168 #undef SETIFVAL 169 /* ignore va->va_vaflags */ 170 } 171 172 void 173 puffs_vattr_null(struct vattr *vap) 174 { 175 176 vap->va_type = VNON; 177 178 /* 179 * Assign individually so that it is safe even if size and 180 * sign of each member are varied. 181 */ 182 vap->va_mode = (mode_t)PUFFS_VNOVAL; 183 vap->va_nlink = (nlink_t)PUFFS_VNOVAL; 184 vap->va_uid = (uid_t)PUFFS_VNOVAL; 185 vap->va_gid = (gid_t)PUFFS_VNOVAL; 186 vap->va_fsid = PUFFS_VNOVAL; 187 vap->va_fileid = (ino_t)PUFFS_VNOVAL; 188 vap->va_size = (u_quad_t)PUFFS_VNOVAL; 189 vap->va_blocksize = sysconf(_SC_PAGESIZE); 190 vap->va_atime.tv_sec = 191 vap->va_mtime.tv_sec = 192 vap->va_ctime.tv_sec = 193 vap->va_birthtime.tv_sec = PUFFS_VNOVAL; 194 vap->va_atime.tv_nsec = 195 vap->va_mtime.tv_nsec = 196 vap->va_ctime.tv_nsec = 197 vap->va_birthtime.tv_nsec = PUFFS_VNOVAL; 198 vap->va_rdev = (dev_t)PUFFS_VNOVAL; 199 vap->va_bytes = (u_quad_t)PUFFS_VNOVAL; 200 201 vap->va_flags = 0; 202 vap->va_gen = 0; 203 vap->va_vaflags = 0; 204 } 205 206 static int vdmap[] = { 207 DT_UNKNOWN, /* VNON */ 208 DT_REG, /* VREG */ 209 DT_DIR, /* VDIR */ 210 DT_BLK, /* VBLK */ 211 DT_CHR, /* VCHR */ 212 DT_LNK, /* VLNK */ 213 DT_SOCK, /* VSUCK*/ 214 DT_FIFO, /* VFIFO*/ 215 DT_UNKNOWN /* VBAD */ 216 }; 217 /* XXX: DT_WHT ? */ 218 int 219 puffs_vtype2dt(enum vtype vt) 220 { 221 222 if ((int)vt >= VNON && vt < (sizeof(vdmap)/sizeof(vdmap[0]))) 223 return vdmap[vt]; 224 225 return DT_UNKNOWN; 226 } 227 228 enum vtype 229 puffs_mode2vt(mode_t mode) 230 { 231 232 switch (mode & S_IFMT) { 233 case S_IFIFO: 234 return VFIFO; 235 case S_IFCHR: 236 return VCHR; 237 case S_IFDIR: 238 return VDIR; 239 case S_IFBLK: 240 return VBLK; 241 case S_IFREG: 242 return VREG; 243 case S_IFLNK: 244 return VLNK; 245 case S_IFSOCK: 246 return VSOCK; 247 default: 248 return VBAD; /* XXX: not really true, but ... */ 249 } 250 } 251 252 void 253 puffs_stat2vattr(struct vattr *va, const struct stat *sb) 254 { 255 256 va->va_type = puffs_mode2vt(sb->st_mode); 257 va->va_mode = sb->st_mode; 258 va->va_nlink = sb->st_nlink; 259 va->va_uid = sb->st_uid; 260 va->va_gid = sb->st_gid; 261 va->va_fsid = sb->st_dev; 262 va->va_fileid = sb->st_ino; 263 va->va_size = sb->st_size; 264 va->va_blocksize = sb->st_blksize; 265 va->va_atime = sb->st_atimespec; 266 va->va_ctime = sb->st_ctimespec; 267 va->va_mtime = sb->st_mtimespec; 268 va->va_birthtime = sb->st_birthtimespec; 269 va->va_gen = sb->st_gen; 270 va->va_flags = sb->st_flags; 271 va->va_rdev = sb->st_rdev; 272 va->va_bytes = sb->st_blocks * sb->st_blksize; 273 va->va_filerev = 0; 274 va->va_vaflags = 0; 275 } 276 277 mode_t 278 puffs_addvtype2mode(mode_t mode, enum vtype type) 279 { 280 281 switch (type) { 282 case VCHR: 283 mode |= S_IFCHR; 284 break; 285 case VBLK: 286 mode |= S_IFBLK; 287 break; 288 default: 289 break; 290 } 291 292 return mode; 293 } 294
Indexes created Tue Oct 07 21:09:53 GMT 2025