1 /* 2 * Copyright (c) 2007-2009 Google Inc. and Amit Singh 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * Copyright (C) 2005 Csaba Henk. 32 * All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 43 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 46 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 53 * SUCH DAMAGE. 54 * 55 * $FreeBSD$ 56 */ 57 58 #ifndef _FUSE_INTERNAL_H_ 59 #define _FUSE_INTERNAL_H_ 60 61 #include <sys/types.h> 62 #include <sys/uio.h> 63 #include <sys/stat.h> 64 #include <sys/vnode.h> 65 66 #include "fuse_ipc.h" 67 #include "fuse_node.h" 68 69 static __inline int 70 vfs_isrdonly(struct mount *mp) 71 { 72 return ((mp->mnt_flag & MNT_RDONLY) != 0 ? 1 : 0); 73 } 74 75 static __inline struct mount * 76 vnode_mount(struct vnode *vp) 77 { 78 return (vp->v_mount); 79 } 80 81 static __inline int 82 vnode_mountedhere(struct vnode *vp) 83 { 84 return (vp->v_mountedhere != NULL ? 1 : 0); 85 } 86 87 static __inline enum vtype 88 vnode_vtype(struct vnode *vp) 89 { 90 return (vp->v_type); 91 } 92 93 static __inline int 94 vnode_isvroot(struct vnode *vp) 95 { 96 return ((vp->v_vflag & VV_ROOT) != 0 ? 1 : 0); 97 } 98 99 static __inline int 100 vnode_isreg(struct vnode *vp) 101 { 102 return (vp->v_type == VREG ? 1 : 0); 103 } 104 105 static __inline int 106 vnode_isdir(struct vnode *vp) 107 { 108 return (vp->v_type == VDIR ? 1 : 0); 109 } 110 111 static __inline int 112 vnode_islnk(struct vnode *vp) 113 { 114 return (vp->v_type == VLNK ? 1 : 0); 115 } 116 117 static __inline ssize_t 118 uio_resid(struct uio *uio) 119 { 120 return (uio->uio_resid); 121 } 122 123 static __inline off_t 124 uio_offset(struct uio *uio) 125 { 126 return (uio->uio_offset); 127 } 128 129 static __inline void 130 uio_setoffset(struct uio *uio, off_t offset) 131 { 132 uio->uio_offset = offset; 133 } 134 135 static __inline void 136 uio_setresid(struct uio *uio, ssize_t resid) 137 { 138 uio->uio_resid = resid; 139 } 140 141 /* miscellaneous */ 142 143 static __inline__ 144 int 145 fuse_isdeadfs(struct vnode *vp) 146 { 147 struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp)); 148 149 return (data->dataflags & FSESS_DEAD); 150 } 151 152 static __inline__ 153 int 154 fuse_iosize(struct vnode *vp) 155 { 156 return vp->v_mount->mnt_stat.f_iosize; 157 } 158 159 /* access */ 160 161 #define FVP_ACCESS_NOOP 0x01 162 163 #define FACCESS_VA_VALID 0x01 164 #define FACCESS_DO_ACCESS 0x02 165 #define FACCESS_STICKY 0x04 166 #define FACCESS_CHOWN 0x08 167 #define FACCESS_NOCHECKSPY 0x10 168 #define FACCESS_SETGID 0x12 169 170 #define FACCESS_XQUERIES FACCESS_STICKY | FACCESS_CHOWN | FACCESS_SETGID 171 172 struct fuse_access_param { 173 uid_t xuid; 174 gid_t xgid; 175 uint32_t facc_flags; 176 }; 177 178 static __inline int 179 fuse_match_cred(struct ucred *basecred, struct ucred *usercred) 180 { 181 if (basecred->cr_uid == usercred->cr_uid && 182 basecred->cr_uid == usercred->cr_ruid && 183 basecred->cr_uid == usercred->cr_svuid && 184 basecred->cr_groups[0] == usercred->cr_groups[0] && 185 basecred->cr_groups[0] == usercred->cr_rgid && 186 basecred->cr_groups[0] == usercred->cr_svgid) 187 return 0; 188 189 return EPERM; 190 } 191 192 int 193 fuse_internal_access(struct vnode *vp, 194 mode_t mode, 195 struct fuse_access_param *facp, 196 struct thread *td, 197 struct ucred *cred); 198 199 /* attributes */ 200 201 static __inline 202 void 203 fuse_internal_attr_fat2vat(struct mount *mp, 204 struct fuse_attr *fat, 205 struct vattr *vap) 206 { 207 DEBUGX(FUSE_DEBUG_INTERNAL, 208 "node #%ju, mode 0%o\n", (uintmax_t)fat->ino, fat->mode); 209 210 vattr_null(vap); 211 212 vap->va_fsid = mp->mnt_stat.f_fsid.val[0]; 213 vap->va_fileid = fat->ino; /* XXX cast from 64 bits to 32 */ 214 vap->va_mode = fat->mode & ~S_IFMT; 215 vap->va_nlink = fat->nlink; 216 vap->va_uid = fat->uid; 217 vap->va_gid = fat->gid; 218 vap->va_rdev = fat->rdev; 219 vap->va_size = fat->size; 220 vap->va_atime.tv_sec = fat->atime; /* XXX on some platforms cast from 64 bits to 32 */ 221 vap->va_atime.tv_nsec = fat->atimensec; 222 vap->va_mtime.tv_sec = fat->mtime; 223 vap->va_mtime.tv_nsec = fat->mtimensec; 224 vap->va_ctime.tv_sec = fat->ctime; 225 vap->va_ctime.tv_nsec = fat->ctimensec; 226 vap->va_blocksize = PAGE_SIZE; 227 vap->va_type = IFTOVT(fat->mode); 228 229 #if (S_BLKSIZE == 512) 230 /* Optimize this case */ 231 vap->va_bytes = fat->blocks << 9; 232 #else 233 vap->va_bytes = fat->blocks * S_BLKSIZE; 234 #endif 235 236 vap->va_flags = 0; 237 } 238 239 240 #define cache_attrs(vp, fuse_out) \ 241 fuse_internal_attr_fat2vat(vnode_mount(vp), &(fuse_out)->attr, \ 242 VTOVA(vp)); 243 244 /* fsync */ 245 246 int 247 fuse_internal_fsync(struct vnode *vp, 248 struct thread *td, 249 struct ucred *cred, 250 struct fuse_filehandle *fufh); 251 252 int 253 fuse_internal_fsync_callback(struct fuse_ticket *tick, struct uio *uio); 254 255 /* readdir */ 256 257 struct pseudo_dirent { 258 uint32_t d_namlen; 259 }; 260 261 int 262 fuse_internal_readdir(struct vnode *vp, 263 struct uio *uio, 264 struct fuse_filehandle *fufh, 265 struct fuse_iov *cookediov); 266 267 int 268 fuse_internal_readdir_processdata(struct uio *uio, 269 size_t reqsize, 270 void *buf, 271 size_t bufsize, 272 void *param); 273 274 /* remove */ 275 276 int 277 fuse_internal_remove(struct vnode *dvp, 278 struct vnode *vp, 279 struct componentname *cnp, 280 enum fuse_opcode op); 281 282 /* rename */ 283 284 int 285 fuse_internal_rename(struct vnode *fdvp, 286 struct componentname *fcnp, 287 struct vnode *tdvp, 288 struct componentname *tcnp); 289 /* revoke */ 290 291 void 292 fuse_internal_vnode_disappear(struct vnode *vp); 293 294 /* strategy */ 295 296 /* entity creation */ 297 298 static __inline 299 int 300 fuse_internal_checkentry(struct fuse_entry_out *feo, enum vtype vtyp) 301 { 302 DEBUGX(FUSE_DEBUG_INTERNAL, 303 "feo=%p, vtype=%d\n", feo, vtyp); 304 305 if (vtyp != IFTOVT(feo->attr.mode)) { 306 DEBUGX(FUSE_DEBUG_INTERNAL, 307 "EINVAL -- %x != %x\n", vtyp, IFTOVT(feo->attr.mode)); 308 return EINVAL; 309 } 310 311 if (feo->nodeid == FUSE_NULL_ID) { 312 DEBUGX(FUSE_DEBUG_INTERNAL, 313 "EINVAL -- feo->nodeid is NULL\n"); 314 return EINVAL; 315 } 316 317 if (feo->nodeid == FUSE_ROOT_ID) { 318 DEBUGX(FUSE_DEBUG_INTERNAL, 319 "EINVAL -- feo->nodeid is FUSE_ROOT_ID\n"); 320 return EINVAL; 321 } 322 323 return 0; 324 } 325 326 int 327 fuse_internal_newentry(struct vnode *dvp, 328 struct vnode **vpp, 329 struct componentname *cnp, 330 enum fuse_opcode op, 331 void *buf, 332 size_t bufsize, 333 enum vtype vtyp); 334 335 void 336 fuse_internal_newentry_makerequest(struct mount *mp, 337 uint64_t dnid, 338 struct componentname *cnp, 339 enum fuse_opcode op, 340 void *buf, 341 size_t bufsize, 342 struct fuse_dispatcher *fdip); 343 344 int 345 fuse_internal_newentry_core(struct vnode *dvp, 346 struct vnode **vpp, 347 struct componentname *cnp, 348 enum vtype vtyp, 349 struct fuse_dispatcher *fdip); 350 351 /* entity destruction */ 352 353 int 354 fuse_internal_forget_callback(struct fuse_ticket *tick, struct uio *uio); 355 356 void 357 fuse_internal_forget_send(struct mount *mp, 358 struct thread *td, 359 struct ucred *cred, 360 uint64_t nodeid, 361 uint64_t nlookup); 362 363 /* fuse start/stop */ 364 365 int fuse_internal_init_callback(struct fuse_ticket *tick, struct uio *uio); 366 void fuse_internal_send_init(struct fuse_data *data, struct thread *td); 367 368 #endif /* _FUSE_INTERNAL_H_ */ 369