Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 1 | /* |
| 2 | FUSE: Filesystem in Userspace |
| 3 | Copyright (C) 2001 Miklos Szeredi (mszeredi@inf.bme.hu) |
| 4 | |
| 5 | This program can be distributed under the terms of the GNU GPL. |
| 6 | See the file COPYING. |
| 7 | */ |
| 8 | |
| 9 | #include "fuse_i.h" |
| 10 | #include <linux/fuse.h> |
| 11 | |
| 12 | #include <string.h> |
| 13 | #include <unistd.h> |
| 14 | #include <errno.h> |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 15 | #include <assert.h> |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 16 | |
| 17 | |
| 18 | static guint name_hash(const struct node *node) |
| 19 | { |
| 20 | return g_str_hash(node->name) ^ node->parent; |
| 21 | } |
| 22 | |
| 23 | static gint name_compare(const struct node *node1, const struct node *node2) |
| 24 | { |
| 25 | return |
| 26 | node1->parent == node2->parent && |
| 27 | strcmp(node1->name, node2->name) == 0; |
| 28 | } |
| 29 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 30 | static struct node *new_node(fino_t parent, const char *name, int mode) |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 31 | { |
| 32 | struct node *node = g_new0(struct node, 1); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 33 | node->name = g_strdup(name); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 34 | node->parent = parent; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 35 | node->mode = mode; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 36 | return node; |
| 37 | } |
| 38 | |
| 39 | static int free_node(struct node *node) |
| 40 | { |
| 41 | g_free(node->name); |
| 42 | g_free(node); |
| 43 | return 1; |
| 44 | } |
| 45 | |
| 46 | static inline struct node *get_node(fino_t ino) |
| 47 | { |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 48 | return (struct node *) ((ino << 3) + 0x8000000); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 49 | } |
| 50 | |
| 51 | static inline fino_t get_ino(struct node *node) |
| 52 | { |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 53 | return (((fino_t) node) - 0x8000000) >> 3; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 54 | } |
| 55 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 56 | static struct node *lookup_node(struct fuse *f, fino_t parent, |
| 57 | const char *name) |
| 58 | { |
| 59 | struct node tmp; |
| 60 | |
| 61 | tmp.name = (char *) name; |
| 62 | tmp.parent = parent; |
| 63 | |
| 64 | return g_hash_table_lookup(f->nametab, &tmp); |
| 65 | } |
| 66 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 67 | static void unhash_node(struct fuse *f, struct node *node) |
| 68 | { |
| 69 | g_hash_table_remove(f->nametab, node); |
| 70 | g_free(node->name); |
| 71 | node->parent = 0; |
| 72 | node->name = NULL; |
| 73 | } |
| 74 | |
| 75 | static fino_t find_node(struct fuse *f, fino_t parent, char *name, int mode) |
| 76 | { |
| 77 | struct node *node; |
| 78 | mode &= S_IFMT; |
| 79 | |
| 80 | node = lookup_node(f, parent, name); |
| 81 | if(node != NULL) { |
| 82 | if(node->mode == mode) |
| 83 | return get_ino(node); |
| 84 | |
| 85 | unhash_node(f, node); |
| 86 | } |
| 87 | |
| 88 | node = new_node(parent, name, mode); |
| 89 | g_hash_table_insert(f->nametab, node, node); |
| 90 | return get_ino(node); |
| 91 | } |
| 92 | |
| 93 | static fino_t find_node_dir(struct fuse *f, fino_t parent, char *name) |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 94 | { |
| 95 | struct node *node; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 96 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 97 | node = lookup_node(f, parent, name); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 98 | if(node != NULL) |
| 99 | return get_ino(node); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 100 | else |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 101 | return (fino_t) -1; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | static char *get_path(fino_t ino) |
| 105 | { |
| 106 | GString *s; |
| 107 | char *ss; |
| 108 | |
| 109 | s = g_string_new(""); |
| 110 | if(ino == FUSE_ROOT_INO) |
| 111 | g_string_prepend_c(s, '/'); |
| 112 | else { |
| 113 | struct node *node; |
| 114 | for(; ino != FUSE_ROOT_INO; ino = node->parent) { |
| 115 | node = get_node(ino); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 116 | if(node->name == NULL) { |
| 117 | g_string_free(s, TRUE); |
| 118 | return NULL; |
| 119 | } |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 120 | g_string_prepend(s, node->name); |
| 121 | g_string_prepend_c(s, '/'); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | ss = s->str; |
| 126 | g_string_free(s, FALSE); |
| 127 | |
| 128 | return ss; |
| 129 | } |
| 130 | |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 131 | static char *get_path_name(fino_t ino, const char *name) |
| 132 | { |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 133 | char *path; |
| 134 | char *path2; |
| 135 | |
| 136 | path = get_path(ino); |
| 137 | if(path == NULL) |
| 138 | return NULL; |
| 139 | |
| 140 | path2 = g_strconcat(path, "/", name, NULL); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 141 | g_free(path); |
| 142 | return path2; |
| 143 | } |
| 144 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 145 | static void destroy_node(struct fuse *f, fino_t ino) |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 146 | { |
| 147 | struct node *node = get_node(ino); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 148 | unhash_node(f, node); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 149 | free_node(node); |
| 150 | } |
| 151 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 152 | static void remove_node(struct fuse *f, fino_t dir, const char *name) |
| 153 | { |
| 154 | struct node *node = lookup_node(f, dir, name); |
| 155 | assert(node != NULL); |
| 156 | unhash_node(f, node); |
| 157 | } |
| 158 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 159 | static void rename_node(struct fuse *f, fino_t olddir, const char *oldname, |
| 160 | fino_t newdir, const char *newname) |
| 161 | { |
| 162 | struct node *node = lookup_node(f, olddir, oldname); |
| 163 | struct node *newnode = lookup_node(f, newdir, newname); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 164 | assert(node != NULL); |
| 165 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 166 | if(newnode != NULL) |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 167 | unhash_node(f, newnode); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 168 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 169 | g_hash_table_remove(f->nametab, node); |
| 170 | g_free(node->name); |
| 171 | node->name = g_strdup(newname); |
| 172 | node->parent = newdir; |
| 173 | g_hash_table_insert(f->nametab, node, node); |
| 174 | } |
| 175 | |
| 176 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 177 | static void convert_stat(struct stat *stbuf, struct fuse_attr *attr) |
| 178 | { |
| 179 | attr->mode = stbuf->st_mode; |
| 180 | attr->nlink = stbuf->st_nlink; |
| 181 | attr->uid = stbuf->st_uid; |
| 182 | attr->gid = stbuf->st_gid; |
| 183 | attr->rdev = stbuf->st_rdev; |
| 184 | attr->size = stbuf->st_size; |
| 185 | attr->blksize = stbuf->st_blksize; |
| 186 | attr->blocks = stbuf->st_blocks; |
| 187 | attr->atime = stbuf->st_atime; |
| 188 | attr->mtime = stbuf->st_mtime; |
| 189 | attr->ctime = stbuf->st_ctime; |
| 190 | } |
| 191 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 192 | static int fill_dir(struct fuse_dh *dh, char *name, int type) |
| 193 | { |
| 194 | struct fuse_dirent dirent; |
| 195 | size_t reclen; |
| 196 | size_t res; |
| 197 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 198 | dirent.ino = find_node_dir(dh->fuse, dh->dir, name); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 199 | dirent.namelen = strlen(name); |
| 200 | strncpy(dirent.name, name, sizeof(dirent.name)); |
| 201 | dirent.type = type; |
| 202 | reclen = FUSE_DIRENT_SIZE(&dirent); |
| 203 | res = fwrite(&dirent, reclen, 1, dh->fp); |
| 204 | if(res == 0) { |
| 205 | perror("writing directory file"); |
| 206 | return -EIO; |
| 207 | } |
| 208 | return 0; |
| 209 | } |
| 210 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 211 | static void send_reply(struct fuse *f, struct fuse_in_header *in, int error, |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 212 | void *arg, size_t argsize) |
| 213 | { |
| 214 | int res; |
| 215 | char *outbuf; |
| 216 | size_t outsize; |
| 217 | struct fuse_out_header *out; |
| 218 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 219 | if(error > 0) { |
| 220 | fprintf(stderr, "positive error code: %i\n", error); |
| 221 | error = -ERANGE; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 222 | } |
| 223 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 224 | if(error) |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 225 | argsize = 0; |
| 226 | |
| 227 | outsize = sizeof(struct fuse_out_header) + argsize; |
| 228 | outbuf = (char *) g_malloc(outsize); |
| 229 | out = (struct fuse_out_header *) outbuf; |
| 230 | out->unique = in->unique; |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 231 | out->error = error; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 232 | if(argsize != 0) |
| 233 | memcpy(outbuf + sizeof(struct fuse_out_header), arg, argsize); |
| 234 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 235 | printf(" unique: %i, error: %i (%s), outsize: %i\n", out->unique, |
| 236 | out->error, strerror(-out->error), outsize); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 237 | |
| 238 | res = write(f->fd, outbuf, outsize); |
| 239 | if(res == -1) |
| 240 | perror("writing fuse device"); |
| 241 | |
| 242 | g_free(outbuf); |
| 243 | } |
| 244 | |
| 245 | static void do_lookup(struct fuse *f, struct fuse_in_header *in, char *name) |
| 246 | { |
| 247 | int res; |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 248 | char *path; |
| 249 | struct stat buf; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 250 | struct fuse_lookup_out arg; |
| 251 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 252 | res = -ENOENT; |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 253 | path = get_path_name(in->ino, name); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 254 | if(path != NULL) { |
| 255 | res = -ENOSYS; |
| 256 | if(f->op.getattr) |
| 257 | res = f->op.getattr(path, &buf); |
| 258 | g_free(path); |
| 259 | } |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 260 | if(res == 0) { |
| 261 | convert_stat(&buf, &arg.attr); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 262 | arg.ino = find_node(f, in->ino, name, arg.attr.mode); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 263 | } |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 264 | send_reply(f, in, res, &arg, sizeof(arg)); |
| 265 | } |
| 266 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 267 | static void do_forget(struct fuse *f, unsigned long *inos, size_t num) |
| 268 | { |
| 269 | size_t i; |
| 270 | |
| 271 | for(i = 0; i < num; i++) |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 272 | destroy_node(f, inos[i]); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | static void do_getattr(struct fuse *f, struct fuse_in_header *in) |
| 276 | { |
| 277 | int res; |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 278 | char *path; |
| 279 | struct stat buf; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 280 | struct fuse_getattr_out arg; |
| 281 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 282 | res = -ENOENT; |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 283 | path = get_path(in->ino); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 284 | if(path != NULL) { |
| 285 | res = -ENOSYS; |
| 286 | if(f->op.getattr) |
| 287 | res = f->op.getattr(path, &buf); |
| 288 | g_free(path); |
| 289 | } |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 290 | if(res == 0) |
| 291 | convert_stat(&buf, &arg.attr); |
| 292 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 293 | send_reply(f, in, res, &arg, sizeof(arg)); |
| 294 | } |
| 295 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 296 | static void do_setattr(struct fuse *f, struct fuse_in_header *in, |
| 297 | struct fuse_setattr_in *arg) |
| 298 | { |
| 299 | int res; |
| 300 | char *path; |
| 301 | int valid = arg->valid; |
| 302 | struct fuse_attr *attr = &arg->attr; |
| 303 | |
| 304 | res = -ENOENT; |
| 305 | path = get_path(in->ino); |
| 306 | if(path != NULL) { |
| 307 | res = 0; |
| 308 | if(!res && (valid & FATTR_MODE)) { |
| 309 | res = -ENOSYS; |
| 310 | if(f->op.chmod) |
| 311 | res = f->op.chmod(path, attr->mode); |
| 312 | } |
| 313 | if(!res && (valid & (FATTR_UID | FATTR_GID))) { |
| 314 | uid_t uid = (valid & FATTR_UID) ? attr->uid : (uid_t) -1; |
| 315 | gid_t gid = (valid & FATTR_GID) ? attr->gid : (gid_t) -1; |
| 316 | |
| 317 | res = -ENOSYS; |
| 318 | if(f->op.chown) |
| 319 | res = f->op.chown(path, uid, gid); |
| 320 | } |
| 321 | if(!res && (valid & FATTR_SIZE)) { |
| 322 | res = -ENOSYS; |
| 323 | if(f->op.truncate) |
| 324 | res = f->op.truncate(path, attr->size); |
| 325 | } |
| 326 | if(!res && (valid & FATTR_UTIME)) { |
| 327 | struct utimbuf buf; |
| 328 | buf.actime = attr->atime; |
| 329 | buf.modtime = attr->mtime; |
| 330 | res = -ENOSYS; |
| 331 | if(f->op.utime) |
| 332 | res = f->op.utime(path, &buf); |
| 333 | } |
| 334 | g_free(path); |
| 335 | } |
| 336 | send_reply(f, in, res, NULL, 0); |
| 337 | } |
| 338 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 339 | static void do_readlink(struct fuse *f, struct fuse_in_header *in) |
| 340 | { |
| 341 | int res; |
| 342 | char link[PATH_MAX + 1]; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 343 | char *path; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 344 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 345 | res = -ENOENT; |
| 346 | path = get_path(in->ino); |
| 347 | if(path != NULL) { |
| 348 | res = -ENOSYS; |
| 349 | if(f->op.readlink) |
| 350 | res = f->op.readlink(path, link, sizeof(link)); |
| 351 | g_free(path); |
| 352 | } |
| 353 | send_reply(f, in, res, link, !res ? strlen(link) : 0); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | static void do_getdir(struct fuse *f, struct fuse_in_header *in) |
| 357 | { |
| 358 | int res; |
| 359 | struct fuse_getdir_out arg; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 360 | struct fuse_dh dh; |
| 361 | char *path; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 362 | |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 363 | dh.fuse = f; |
| 364 | dh.fp = tmpfile(); |
| 365 | dh.dir = in->ino; |
| 366 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 367 | res = -ENOENT; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 368 | path = get_path(in->ino); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 369 | if(path != NULL) { |
| 370 | res = -ENOSYS; |
| 371 | if(f->op.getdir) |
| 372 | res = f->op.getdir(path, &dh, (dirfiller_t) fill_dir); |
| 373 | g_free(path); |
| 374 | } |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 375 | fflush(dh.fp); |
| 376 | arg.fd = fileno(dh.fp); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 377 | send_reply(f, in, res, &arg, sizeof(arg)); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 378 | fclose(dh.fp); |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 379 | } |
| 380 | |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 381 | static void do_mknod(struct fuse *f, struct fuse_in_header *in, |
| 382 | struct fuse_mknod_in *inarg) |
| 383 | { |
| 384 | int res; |
| 385 | char *path; |
| 386 | struct fuse_mknod_out outarg; |
| 387 | struct stat buf; |
| 388 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 389 | res = -ENOENT; |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 390 | path = get_path_name(in->ino, inarg->name); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 391 | if(path != NULL) { |
| 392 | res = -ENOSYS; |
| 393 | if(f->op.mknod && f->op.getattr) { |
| 394 | res = f->op.mknod(path, inarg->mode, inarg->rdev); |
| 395 | if(res == 0) |
| 396 | res = f->op.getattr(path, &buf); |
| 397 | } |
| 398 | g_free(path); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 399 | } |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 400 | if(res == 0) { |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 401 | convert_stat(&buf, &outarg.attr); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 402 | outarg.ino = find_node(f, in->ino, inarg->name, outarg.attr.mode); |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 403 | } |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 404 | |
| 405 | send_reply(f, in, res, &outarg, sizeof(outarg)); |
| 406 | } |
| 407 | |
| 408 | static void do_mkdir(struct fuse *f, struct fuse_in_header *in, |
| 409 | struct fuse_mkdir_in *inarg) |
| 410 | { |
| 411 | int res; |
| 412 | char *path; |
| 413 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 414 | res = -ENOENT; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 415 | path = get_path_name(in->ino, inarg->name); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 416 | if(path != NULL) { |
| 417 | res = -ENOSYS; |
| 418 | if(f->op.mkdir) |
| 419 | res = f->op.mkdir(path, inarg->mode); |
| 420 | g_free(path); |
| 421 | } |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 422 | send_reply(f, in, res, NULL, 0); |
| 423 | } |
| 424 | |
| 425 | static void do_remove(struct fuse *f, struct fuse_in_header *in, char *name) |
| 426 | { |
| 427 | int res; |
| 428 | char *path; |
| 429 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 430 | res = -ENOENT; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 431 | path = get_path_name(in->ino, name); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 432 | if(path != NULL) { |
| 433 | res = -ENOSYS; |
| 434 | if(in->opcode == FUSE_UNLINK) { |
| 435 | if(f->op.unlink) |
| 436 | res = f->op.unlink(path); |
| 437 | } |
| 438 | else { |
| 439 | if(f->op.rmdir) |
| 440 | res = f->op.rmdir(path); |
| 441 | } |
| 442 | g_free(path); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 443 | } |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 444 | if(res == 0) |
| 445 | remove_node(f, in->ino, name); |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 446 | send_reply(f, in, res, NULL, 0); |
| 447 | } |
| 448 | |
| 449 | static void do_symlink(struct fuse *f, struct fuse_in_header *in, char *name, |
| 450 | char *link) |
| 451 | { |
| 452 | int res; |
| 453 | char *path; |
| 454 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 455 | res = -ENOENT; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 456 | path = get_path_name(in->ino, name); |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 457 | if(path != NULL) { |
| 458 | res = -ENOSYS; |
| 459 | if(f->op.symlink) |
| 460 | res = f->op.symlink(link, path); |
| 461 | g_free(path); |
| 462 | } |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 463 | send_reply(f, in, res, NULL, 0); |
| 464 | } |
| 465 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 466 | static void do_rename(struct fuse *f, struct fuse_in_header *in, |
| 467 | struct fuse_rename_in *inarg) |
| 468 | { |
| 469 | int res; |
| 470 | fino_t olddir = in->ino; |
| 471 | fino_t newdir = inarg->newdir; |
| 472 | char *oldname = inarg->names; |
| 473 | char *newname = inarg->names + strlen(oldname) + 1; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 474 | char *oldpath; |
| 475 | char *newpath; |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 476 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 477 | res = -ENOENT; |
| 478 | oldpath = get_path_name(olddir, oldname); |
| 479 | if(oldpath != NULL) { |
| 480 | newpath = get_path_name(newdir, newname); |
| 481 | if(newpath != NULL) { |
| 482 | res = -ENOSYS; |
| 483 | if(f->op.rename) |
| 484 | res = f->op.rename(oldpath, newpath); |
| 485 | if(res == 0) |
| 486 | rename_node(f, olddir, oldname, newdir, newname); |
| 487 | g_free(newpath); |
| 488 | } |
| 489 | g_free(oldpath); |
| 490 | } |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 491 | send_reply(f, in, res, NULL, 0); |
| 492 | } |
| 493 | |
| 494 | static void do_link(struct fuse *f, struct fuse_in_header *in, |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 495 | struct fuse_link_in *arg) |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 496 | { |
| 497 | int res; |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 498 | char *oldpath; |
| 499 | char *newpath; |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 500 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 501 | res = -ENOENT; |
| 502 | oldpath = get_path(in->ino); |
| 503 | if(oldpath != NULL) { |
| 504 | newpath = get_path_name(arg->newdir, arg->name); |
| 505 | if(newpath != NULL) { |
| 506 | res = -ENOSYS; |
| 507 | if(f->op.link) |
| 508 | res = f->op.link(oldpath, newpath); |
| 509 | g_free(newpath); |
| 510 | } |
| 511 | g_free(oldpath); |
| 512 | } |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 513 | send_reply(f, in, res, NULL, 0); |
| 514 | } |
| 515 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 516 | static void do_open(struct fuse *f, struct fuse_in_header *in, |
| 517 | struct fuse_open_in *arg) |
| 518 | { |
| 519 | int res; |
| 520 | char *path; |
| 521 | |
| 522 | res = -ENOENT; |
| 523 | path = get_path(in->ino); |
| 524 | if(path != NULL) { |
| 525 | res = -ENOSYS; |
| 526 | if(f->op.open) |
| 527 | res = f->op.open(path, arg->flags); |
| 528 | g_free(path); |
| 529 | } |
| 530 | send_reply(f, in, res, NULL, 0); |
| 531 | } |
| 532 | |
| 533 | static void do_read(struct fuse *f, struct fuse_in_header *in, |
| 534 | struct fuse_read_in *arg) |
| 535 | { |
| 536 | int res; |
| 537 | char *path; |
| 538 | char *buf = g_malloc(arg->size); |
| 539 | size_t size; |
| 540 | |
| 541 | path = get_path(in->ino); |
| 542 | if(path != NULL) { |
| 543 | res = -ENOSYS; |
| 544 | if(f->op.pread) |
| 545 | res = f->op.pread(path, buf, arg->size, arg->offset); |
| 546 | g_free(path); |
| 547 | } |
| 548 | |
| 549 | size = 0; |
| 550 | if(res > 0) { |
| 551 | size = res; |
| 552 | res = 0; |
| 553 | } |
| 554 | |
| 555 | send_reply(f, in, res, buf, size); |
| 556 | g_free(buf); |
| 557 | } |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 558 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 559 | void fuse_loop(struct fuse *f) |
| 560 | { |
| 561 | int res; |
| 562 | char inbuf[FUSE_MAX_IN]; |
| 563 | struct fuse_in_header *in = (struct fuse_in_header *) inbuf; |
| 564 | void *inarg = inbuf + sizeof(struct fuse_in_header); |
| 565 | size_t insize; |
| 566 | size_t argsize; |
| 567 | |
| 568 | while(1) { |
| 569 | res = read(f->fd, inbuf, sizeof(inbuf)); |
| 570 | if(res == -1) { |
| 571 | perror("reading fuse device"); |
| 572 | continue; |
| 573 | } |
| 574 | insize = res; |
| 575 | |
| 576 | if(insize < sizeof(struct fuse_in_header)) { |
| 577 | fprintf(stderr, "short read on fuse device\n"); |
| 578 | continue; |
| 579 | } |
| 580 | printf("unique: %i, opcode: %i, ino: %li, insize: %i (%i)\n", |
| 581 | in->unique, in->opcode, in->ino, insize, |
| 582 | g_hash_table_size(f->nametab)); |
| 583 | |
| 584 | argsize = insize - sizeof(struct fuse_in_header); |
| 585 | |
| 586 | switch(in->opcode) { |
| 587 | case FUSE_LOOKUP: |
| 588 | do_lookup(f, in, (char *) inarg); |
| 589 | break; |
| 590 | |
| 591 | case FUSE_FORGET: |
| 592 | do_forget(f, (unsigned long *) inarg, |
| 593 | argsize / sizeof(unsigned long)); |
| 594 | break; |
| 595 | |
| 596 | case FUSE_GETATTR: |
| 597 | do_getattr(f, in); |
| 598 | break; |
| 599 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 600 | case FUSE_SETATTR: |
| 601 | do_setattr(f, in, (struct fuse_setattr_in *) inarg); |
| 602 | break; |
| 603 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 604 | case FUSE_READLINK: |
| 605 | do_readlink(f, in); |
| 606 | break; |
| 607 | |
| 608 | case FUSE_GETDIR: |
| 609 | do_getdir(f, in); |
| 610 | break; |
| 611 | |
| 612 | case FUSE_MKNOD: |
| 613 | do_mknod(f, in, (struct fuse_mknod_in *) inarg); |
| 614 | break; |
Miklos Szeredi | b483c93 | 2001-10-29 14:57:57 +0000 | [diff] [blame] | 615 | |
| 616 | case FUSE_MKDIR: |
| 617 | do_mkdir(f, in, (struct fuse_mkdir_in *) inarg); |
| 618 | break; |
| 619 | |
| 620 | case FUSE_UNLINK: |
| 621 | case FUSE_RMDIR: |
| 622 | do_remove(f, in, (char *) inarg); |
| 623 | break; |
| 624 | |
| 625 | case FUSE_SYMLINK: |
| 626 | do_symlink(f, in, (char *) inarg, |
| 627 | ((char *) inarg) + strlen((char *) inarg) + 1); |
| 628 | break; |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 629 | |
Miklos Szeredi | 19dff1b | 2001-10-30 15:06:52 +0000 | [diff] [blame] | 630 | case FUSE_RENAME: |
| 631 | do_rename(f, in, (struct fuse_rename_in *) inarg); |
| 632 | break; |
| 633 | |
| 634 | case FUSE_LINK: |
| 635 | do_link(f, in, (struct fuse_link_in *) inarg); |
| 636 | break; |
| 637 | |
Miklos Szeredi | 5e18348 | 2001-10-31 14:52:35 +0000 | [diff] [blame^] | 638 | case FUSE_OPEN: |
| 639 | do_open(f, in, (struct fuse_open_in *) inarg); |
| 640 | break; |
| 641 | |
| 642 | case FUSE_READ: |
| 643 | do_read(f, in, (struct fuse_read_in *) inarg); |
| 644 | break; |
| 645 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 646 | default: |
| 647 | fprintf(stderr, "Operation %i not implemented\n", in->opcode); |
| 648 | /* No need to send reply to async requests */ |
| 649 | if(in->unique != 0) |
| 650 | send_reply(f, in, -ENOSYS, NULL, 0); |
| 651 | } |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | struct fuse *fuse_new() |
| 656 | { |
| 657 | struct fuse *f = g_new0(struct fuse, 1); |
| 658 | |
| 659 | f->fd = -1; |
| 660 | f->dir = NULL; |
| 661 | f->nametab = g_hash_table_new((GHashFunc) name_hash, |
| 662 | (GCompareFunc) name_compare); |
| 663 | |
| 664 | return f; |
| 665 | } |
| 666 | |
Miklos Szeredi | 85c74fc | 2001-10-28 19:44:14 +0000 | [diff] [blame] | 667 | void fuse_set_operations(struct fuse *f, const struct fuse_operations *op) |
| 668 | { |
| 669 | f->op = *op; |
| 670 | } |
| 671 | |
| 672 | void fuse_destroy(struct fuse *f) |
| 673 | { |
| 674 | fuse_unmount(f); |
| 675 | g_hash_table_foreach_remove(f->nametab, (GHRFunc) free_node, NULL); |
| 676 | g_hash_table_destroy(f->nametab); |
| 677 | g_free(f); |
| 678 | } |