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Rev 2787 | Rev 2925 | ||
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Line 140... | Line 140... | ||
140 | unsigned next = IPC_GET_ARG1(*request); |
140 | unsigned next = IPC_GET_ARG1(*request); |
141 | unsigned last = IPC_GET_ARG2(*request); |
141 | unsigned last = IPC_GET_ARG2(*request); |
142 | dev_handle_t dev_handle = IPC_GET_ARG3(*request); |
142 | dev_handle_t dev_handle = IPC_GET_ARG3(*request); |
143 | int lflag = IPC_GET_ARG4(*request); |
143 | int lflag = IPC_GET_ARG4(*request); |
144 | fs_index_t index = IPC_GET_ARG5(*request); /* when L_LINK specified */ |
144 | fs_index_t index = IPC_GET_ARG5(*request); /* when L_LINK specified */ |
- | 145 | char component[NAME_MAX + 1]; |
|
- | 146 | int len; |
|
145 | 147 | ||
146 | if (last < next) |
148 | if (last < next) |
147 | last += PLB_SIZE; |
149 | last += PLB_SIZE; |
148 | 150 | ||
149 | void *par = NULL; |
151 | void *par = NULL; |
150 | void *cur = ops->root_get(); |
152 | void *cur = ops->root_get(dev_handle); |
151 | void *tmp = ops->child_get(cur); |
153 | void *tmp = NULL; |
152 | 154 | ||
153 | if (ops->plb_get_char(next) == '/') |
155 | if (ops->plb_get_char(next) == '/') |
154 | next++; /* eat slash */ |
156 | next++; /* eat slash */ |
155 | 157 | ||
156 | char component[NAME_MAX + 1]; |
- | |
157 | int len = 0; |
- | |
158 | while (tmp && next <= last) { |
158 | while (ops->has_children(cur) && next <= last) { |
159 | - | ||
160 | /* collect the component */ |
159 | /* collect the component */ |
- | 160 | len = 0; |
|
161 | if (ops->plb_get_char(next) != '/') { |
161 | while ((ops->plb_get_char(next) != '/') && (next <= last)) { |
162 | if (len + 1 == NAME_MAX) { |
162 | if (len + 1 == NAME_MAX) { |
163 | /* comopnent length overflow */ |
163 | /* comopnent length overflow */ |
164 | ipc_answer_0(rid, ENAMETOOLONG); |
164 | ipc_answer_0(rid, ENAMETOOLONG); |
165 | return; |
165 | goto out; |
166 | } |
166 | } |
167 | component[len++] = ops->plb_get_char(next); |
167 | component[len++] = ops->plb_get_char(next); |
168 | next++; /* process next character */ |
168 | next++; /* process next character */ |
169 | if (next <= last) |
- | |
170 | continue; |
- | |
171 | } |
169 | } |
172 | 170 | ||
173 | assert(len); |
171 | assert(len); |
174 | component[len] = '\0'; |
172 | component[len] = '\0'; |
175 | next++; /* eat slash */ |
173 | next++; /* eat slash */ |
176 | len = 0; |
- | |
177 | 174 | ||
178 | /* match the component */ |
175 | /* match the component */ |
179 | while (tmp && !ops->match(cur, tmp, component)) |
176 | tmp = ops->match(cur, component); |
180 | tmp = ops->sibling_get(tmp); |
- | |
181 | 177 | ||
182 | /* handle miss: match amongst siblings */ |
178 | /* handle miss: match amongst siblings */ |
183 | if (!tmp) { |
179 | if (!tmp) { |
184 | if (next <= last) { |
180 | if (next <= last) { |
185 | /* there are unprocessed components */ |
181 | /* there are unprocessed components */ |
186 | ipc_answer_0(rid, ENOENT); |
182 | ipc_answer_0(rid, ENOENT); |
187 | return; |
183 | goto out; |
188 | } |
184 | } |
189 | /* miss in the last component */ |
185 | /* miss in the last component */ |
190 | if (lflag & (L_CREATE | L_LINK)) { |
186 | if (lflag & (L_CREATE | L_LINK)) { |
191 | /* request to create a new link */ |
187 | /* request to create a new link */ |
192 | if (!ops->is_directory(cur)) { |
188 | if (!ops->is_directory(cur)) { |
193 | ipc_answer_0(rid, ENOTDIR); |
189 | ipc_answer_0(rid, ENOTDIR); |
194 | return; |
190 | goto out; |
195 | } |
191 | } |
196 | void *nodep; |
192 | void *nodep; |
197 | if (lflag & L_CREATE) |
193 | if (lflag & L_CREATE) |
198 | nodep = ops->create(lflag); |
194 | nodep = ops->create(lflag); |
199 | else |
195 | else |
200 | nodep = ops->node_get(fs_handle, |
196 | nodep = ops->node_get(dev_handle, |
201 | dev_handle, index); |
197 | index); |
202 | if (nodep) { |
198 | if (nodep) { |
203 | if (!ops->link(cur, nodep, component)) { |
199 | if (!ops->link(cur, nodep, component)) { |
204 | if (lflag & L_CREATE) |
200 | if (lflag & L_CREATE) |
205 | ops->destroy(nodep); |
201 | (void)ops->destroy(nodep); |
206 | ipc_answer_0(rid, ENOSPC); |
202 | ipc_answer_0(rid, ENOSPC); |
207 | } else { |
203 | } else { |
208 | ipc_answer_5(rid, EOK, |
204 | ipc_answer_5(rid, EOK, |
209 | fs_handle, dev_handle, |
205 | fs_handle, dev_handle, |
210 | ops->index_get(nodep), |
206 | ops->index_get(nodep), |
211 | ops->size_get(nodep), |
207 | ops->size_get(nodep), |
212 | ops->lnkcnt_get(nodep)); |
208 | ops->lnkcnt_get(nodep)); |
- | 209 | ops->node_put(nodep); |
|
213 | } |
210 | } |
214 | } else { |
211 | } else { |
215 | ipc_answer_0(rid, ENOSPC); |
212 | ipc_answer_0(rid, ENOSPC); |
216 | } |
213 | } |
217 | return; |
214 | goto out; |
218 | } else if (lflag & L_PARENT) { |
215 | } else if (lflag & L_PARENT) { |
219 | /* return parent */ |
216 | /* return parent */ |
220 | ipc_answer_5(rid, EOK, fs_handle, dev_handle, |
217 | ipc_answer_5(rid, EOK, fs_handle, dev_handle, |
221 | ops->index_get(cur), ops->size_get(cur), |
218 | ops->index_get(cur), ops->size_get(cur), |
222 | ops->lnkcnt_get(cur)); |
219 | ops->lnkcnt_get(cur)); |
223 | } |
220 | } |
224 | ipc_answer_0(rid, ENOENT); |
221 | ipc_answer_0(rid, ENOENT); |
225 | return; |
222 | goto out; |
226 | } |
223 | } |
227 | 224 | ||
- | 225 | if (par) |
|
- | 226 | ops->node_put(par); |
|
- | 227 | ||
228 | /* descend one level */ |
228 | /* descend one level */ |
229 | par = cur; |
229 | par = cur; |
230 | cur = tmp; |
230 | cur = tmp; |
231 | tmp = ops->child_get(tmp); |
231 | tmp = NULL; |
232 | } |
232 | } |
233 | 233 | ||
234 | /* handle miss: excessive components */ |
234 | /* handle miss: excessive components */ |
235 | if (!tmp && next <= last) { |
235 | if (!ops->has_children(cur) && next <= last) { |
236 | if (lflag & (L_CREATE | L_LINK)) { |
236 | if (lflag & (L_CREATE | L_LINK)) { |
237 | if (!ops->is_directory(cur)) { |
237 | if (!ops->is_directory(cur)) { |
238 | ipc_answer_0(rid, ENOTDIR); |
238 | ipc_answer_0(rid, ENOTDIR); |
239 | return; |
239 | goto out; |
240 | } |
240 | } |
241 | 241 | ||
242 | /* collect next component */ |
242 | /* collect next component */ |
- | 243 | len = 0; |
|
243 | while (next <= last) { |
244 | while (next <= last) { |
244 | if (ops->plb_get_char(next) == '/') { |
245 | if (ops->plb_get_char(next) == '/') { |
245 | /* more than one component */ |
246 | /* more than one component */ |
246 | ipc_answer_0(rid, ENOENT); |
247 | ipc_answer_0(rid, ENOENT); |
247 | return; |
248 | goto out; |
248 | } |
249 | } |
249 | if (len + 1 == NAME_MAX) { |
250 | if (len + 1 == NAME_MAX) { |
250 | /* component length overflow */ |
251 | /* component length overflow */ |
251 | ipc_answer_0(rid, ENAMETOOLONG); |
252 | ipc_answer_0(rid, ENAMETOOLONG); |
252 | return; |
253 | goto out; |
253 | } |
254 | } |
254 | component[len++] = ops->plb_get_char(next); |
255 | component[len++] = ops->plb_get_char(next); |
255 | next++; /* process next character */ |
256 | next++; /* process next character */ |
256 | } |
257 | } |
257 | assert(len); |
258 | assert(len); |
258 | component[len] = '\0'; |
259 | component[len] = '\0'; |
259 | len = 0; |
- | |
260 | 260 | ||
261 | void *nodep; |
261 | void *nodep; |
262 | if (lflag & L_CREATE) |
262 | if (lflag & L_CREATE) |
263 | nodep = ops->create(lflag); |
263 | nodep = ops->create(lflag); |
264 | else |
264 | else |
265 | nodep = ops->node_get(fs_handle, dev_handle, |
265 | nodep = ops->node_get(dev_handle, index); |
266 | index); |
- | |
267 | if (nodep) { |
266 | if (nodep) { |
268 | if (!ops->link(cur, nodep, component)) { |
267 | if (!ops->link(cur, nodep, component)) { |
269 | if (lflag & L_CREATE) |
268 | if (lflag & L_CREATE) |
270 | ops->destroy(nodep); |
269 | (void)ops->destroy(nodep); |
271 | ipc_answer_0(rid, ENOSPC); |
270 | ipc_answer_0(rid, ENOSPC); |
272 | } else { |
271 | } else { |
273 | ipc_answer_5(rid, EOK, |
272 | ipc_answer_5(rid, EOK, |
274 | fs_handle, dev_handle, |
273 | fs_handle, dev_handle, |
275 | ops->index_get(nodep), |
274 | ops->index_get(nodep), |
276 | ops->size_get(nodep), |
275 | ops->size_get(nodep), |
277 | ops->lnkcnt_get(nodep)); |
276 | ops->lnkcnt_get(nodep)); |
- | 277 | ops->node_put(nodep); |
|
278 | } |
278 | } |
279 | } else { |
279 | } else { |
280 | ipc_answer_0(rid, ENOSPC); |
280 | ipc_answer_0(rid, ENOSPC); |
281 | } |
281 | } |
282 | return; |
282 | goto out; |
283 | } |
283 | } |
284 | ipc_answer_0(rid, ENOENT); |
284 | ipc_answer_0(rid, ENOENT); |
285 | return; |
285 | goto out; |
286 | } |
286 | } |
287 | 287 | ||
288 | /* handle hit */ |
288 | /* handle hit */ |
289 | if (lflag & L_PARENT) { |
289 | if (lflag & L_PARENT) { |
- | 290 | ops->node_put(cur); |
|
290 | cur = par; |
291 | cur = par; |
- | 292 | par = NULL; |
|
291 | if (!cur) { |
293 | if (!cur) { |
292 | ipc_answer_0(rid, ENOENT); |
294 | ipc_answer_0(rid, ENOENT); |
293 | return; |
295 | goto out; |
294 | } |
296 | } |
295 | } |
297 | } |
296 | if (lflag & L_UNLINK) { |
298 | if (lflag & L_UNLINK) { |
297 | unsigned old_lnkcnt = ops->lnkcnt_get(cur); |
299 | unsigned old_lnkcnt = ops->lnkcnt_get(cur); |
298 | int res = ops->unlink(par, cur); |
300 | int res = ops->unlink(par, cur); |
299 | ipc_answer_5(rid, (ipcarg_t)res, fs_handle, dev_handle, |
301 | ipc_answer_5(rid, (ipcarg_t)res, fs_handle, dev_handle, |
300 | ops->index_get(cur), ops->size_get(cur), old_lnkcnt); |
302 | ops->index_get(cur), ops->size_get(cur), old_lnkcnt); |
301 | return; |
303 | goto out; |
302 | } |
304 | } |
303 | if (((lflag & (L_CREATE | L_EXCLUSIVE)) == (L_CREATE | L_EXCLUSIVE)) || |
305 | if (((lflag & (L_CREATE | L_EXCLUSIVE)) == (L_CREATE | L_EXCLUSIVE)) || |
304 | (lflag & L_LINK)) { |
306 | (lflag & L_LINK)) { |
305 | ipc_answer_0(rid, EEXIST); |
307 | ipc_answer_0(rid, EEXIST); |
306 | return; |
308 | goto out; |
307 | } |
309 | } |
308 | if ((lflag & L_FILE) && (ops->is_directory(cur))) { |
310 | if ((lflag & L_FILE) && (ops->is_directory(cur))) { |
309 | ipc_answer_0(rid, EISDIR); |
311 | ipc_answer_0(rid, EISDIR); |
310 | return; |
312 | goto out; |
311 | } |
313 | } |
312 | if ((lflag & L_DIRECTORY) && (ops->is_file(cur))) { |
314 | if ((lflag & L_DIRECTORY) && (ops->is_file(cur))) { |
313 | ipc_answer_0(rid, ENOTDIR); |
315 | ipc_answer_0(rid, ENOTDIR); |
314 | return; |
316 | goto out; |
315 | } |
317 | } |
316 | 318 | ||
317 | ipc_answer_5(rid, EOK, fs_handle, dev_handle, ops->index_get(cur), |
319 | ipc_answer_5(rid, EOK, fs_handle, dev_handle, ops->index_get(cur), |
318 | ops->size_get(cur), ops->lnkcnt_get(cur)); |
320 | ops->size_get(cur), ops->lnkcnt_get(cur)); |
- | 321 | ||
- | 322 | out: |
|
- | 323 | if (par) |
|
- | 324 | ops->node_put(par); |
|
- | 325 | if (cur) |
|
- | 326 | ops->node_put(cur); |
|
- | 327 | if (tmp) |
|
- | 328 | ops->node_put(tmp); |
|
319 | } |
329 | } |
320 | 330 | ||
321 | /** @} |
331 | /** @} |
322 | */ |
332 | */ |