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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Jakub Jermar |
2 | * Copyright (c) 2009 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
Line 120... | Line 120... | ||
120 | async_set_client_connection(conn); |
120 | async_set_client_connection(conn); |
121 | 121 | ||
122 | return IPC_GET_RETVAL(answer); |
122 | return IPC_GET_RETVAL(answer); |
123 | } |
123 | } |
124 | 124 | ||
- | 125 | void fs_node_initialize(fs_node_t *fn) |
|
- | 126 | { |
|
- | 127 | memset(fn, 0, sizeof(fs_node_t)); |
|
- | 128 | } |
|
- | 129 | ||
- | 130 | void libfs_mount(libfs_ops_t *ops, ipc_callid_t rid, ipc_call_t *request) |
|
- | 131 | { |
|
- | 132 | dev_handle_t mp_dev_handle = (dev_handle_t) IPC_GET_ARG1(*request); |
|
- | 133 | fs_index_t mp_fs_index = (fs_index_t) IPC_GET_ARG2(*request); |
|
- | 134 | fs_handle_t mr_fs_handle = (fs_handle_t) IPC_GET_ARG3(*request); |
|
- | 135 | dev_handle_t mr_dev_handle = (dev_handle_t) IPC_GET_ARG4(*request); |
|
- | 136 | int res; |
|
- | 137 | ipcarg_t rc; |
|
- | 138 | ||
- | 139 | ipc_call_t call; |
|
- | 140 | ipc_callid_t callid; |
|
- | 141 | ||
- | 142 | /* accept the phone */ |
|
- | 143 | callid = async_get_call(&call); |
|
- | 144 | int mountee_phone = (int)IPC_GET_ARG1(call); |
|
- | 145 | if ((IPC_GET_METHOD(call) != IPC_M_CONNECTION_CLONE) || |
|
- | 146 | mountee_phone < 0) { |
|
- | 147 | ipc_answer_0(callid, EINVAL); |
|
- | 148 | ipc_answer_0(rid, EINVAL); |
|
- | 149 | return; |
|
- | 150 | } |
|
- | 151 | ipc_answer_0(callid, EOK); /* acknowledge the mountee_phone */ |
|
- | 152 | ||
- | 153 | res = ipc_data_write_receive(&callid, NULL); |
|
- | 154 | if (!res) { |
|
- | 155 | ipc_hangup(mountee_phone); |
|
- | 156 | ipc_answer_0(callid, EINVAL); |
|
- | 157 | ipc_answer_0(rid, EINVAL); |
|
- | 158 | return; |
|
- | 159 | } |
|
- | 160 | ||
- | 161 | fs_node_t *fn = ops->node_get(mp_dev_handle, mp_fs_index); |
|
- | 162 | if (!fn) { |
|
- | 163 | ipc_hangup(mountee_phone); |
|
- | 164 | ipc_answer_0(callid, ENOENT); |
|
- | 165 | ipc_answer_0(rid, ENOENT); |
|
- | 166 | return; |
|
- | 167 | } |
|
- | 168 | ||
- | 169 | if (fn->mp_data.mp_active) { |
|
- | 170 | ipc_hangup(mountee_phone); |
|
- | 171 | ops->node_put(fn); |
|
- | 172 | ipc_answer_0(callid, EBUSY); |
|
- | 173 | ipc_answer_0(rid, EBUSY); |
|
- | 174 | return; |
|
- | 175 | } |
|
- | 176 | ||
- | 177 | rc = async_req_0_0(mountee_phone, IPC_M_CONNECT_ME); |
|
- | 178 | if (rc != 0) { |
|
- | 179 | ipc_hangup(mountee_phone); |
|
- | 180 | ops->node_put(fn); |
|
- | 181 | ipc_answer_0(callid, rc); |
|
- | 182 | ipc_answer_0(rid, rc); |
|
- | 183 | return; |
|
- | 184 | } |
|
- | 185 | ||
- | 186 | ipc_call_t answer; |
|
- | 187 | aid_t msg = async_send_1(mountee_phone, VFS_MOUNTED, mr_dev_handle, |
|
- | 188 | &answer); |
|
- | 189 | ipc_forward_fast(callid, mountee_phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME); |
|
- | 190 | async_wait_for(msg, &rc); |
|
- | 191 | ||
- | 192 | if (rc == EOK) { |
|
- | 193 | fn->mp_data.mp_active = true; |
|
- | 194 | fn->mp_data.fs_handle = mr_fs_handle; |
|
- | 195 | fn->mp_data.dev_handle = mr_dev_handle; |
|
- | 196 | fn->mp_data.phone = mountee_phone; |
|
- | 197 | } |
|
- | 198 | /* |
|
- | 199 | * Do not release the FS node so that it stays in memory. |
|
- | 200 | */ |
|
- | 201 | ipc_answer_0(rid, rc); |
|
- | 202 | } |
|
- | 203 | ||
125 | /** Lookup VFS triplet by name in the file system name space. |
204 | /** Lookup VFS triplet by name in the file system name space. |
126 | * |
205 | * |
127 | * The path passed in the PLB must be in the canonical file system path format |
206 | * The path passed in the PLB must be in the canonical file system path format |
128 | * as returned by the canonify() function. |
207 | * as returned by the canonify() function. |
129 | * |
208 | * |
Line 135... | Line 214... | ||
135 | * @param request VFS_LOOKUP request data itself. |
214 | * @param request VFS_LOOKUP request data itself. |
136 | */ |
215 | */ |
137 | void libfs_lookup(libfs_ops_t *ops, fs_handle_t fs_handle, ipc_callid_t rid, |
216 | void libfs_lookup(libfs_ops_t *ops, fs_handle_t fs_handle, ipc_callid_t rid, |
138 | ipc_call_t *request) |
217 | ipc_call_t *request) |
139 | { |
218 | { |
140 | unsigned next = IPC_GET_ARG1(*request); |
219 | unsigned first = IPC_GET_ARG1(*request); |
141 | unsigned last = IPC_GET_ARG2(*request); |
220 | unsigned last = IPC_GET_ARG2(*request); |
- | 221 | unsigned next = first; |
|
142 | dev_handle_t dev_handle = IPC_GET_ARG3(*request); |
222 | dev_handle_t dev_handle = IPC_GET_ARG3(*request); |
143 | int lflag = IPC_GET_ARG4(*request); |
223 | int lflag = IPC_GET_ARG4(*request); |
144 | fs_index_t index = IPC_GET_ARG5(*request); /* when L_LINK specified */ |
224 | fs_index_t index = IPC_GET_ARG5(*request); /* when L_LINK specified */ |
145 | char component[NAME_MAX + 1]; |
225 | char component[NAME_MAX + 1]; |
146 | int len; |
226 | int len; |
147 | 227 | ||
148 | if (last < next) |
228 | if (last < next) |
149 | last += PLB_SIZE; |
229 | last += PLB_SIZE; |
150 | 230 | ||
151 | void *par = NULL; |
231 | fs_node_t *par = NULL; |
152 | void *cur = ops->root_get(dev_handle); |
232 | fs_node_t *cur = ops->root_get(dev_handle); |
153 | void *tmp = NULL; |
233 | fs_node_t *tmp = NULL; |
- | 234 | ||
- | 235 | if (cur->mp_data.mp_active) { |
|
- | 236 | ipc_forward_slow(rid, cur->mp_data.phone, VFS_LOOKUP, |
|
- | 237 | next, last, cur->mp_data.dev_handle, lflag, index, |
|
- | 238 | IPC_FF_ROUTE_FROM_ME); |
|
- | 239 | ops->node_put(cur); |
|
- | 240 | return; |
|
- | 241 | } |
|
154 | 242 | ||
155 | if (ops->plb_get_char(next) == '/') |
243 | if (ops->plb_get_char(next) == '/') |
156 | next++; /* eat slash */ |
244 | next++; /* eat slash */ |
157 | 245 | ||
158 | while (next <= last && ops->has_children(cur)) { |
246 | while (next <= last && ops->has_children(cur)) { |
Line 172... | Line 260... | ||
172 | component[len] = '\0'; |
260 | component[len] = '\0'; |
173 | next++; /* eat slash */ |
261 | next++; /* eat slash */ |
174 | 262 | ||
175 | /* match the component */ |
263 | /* match the component */ |
176 | tmp = ops->match(cur, component); |
264 | tmp = ops->match(cur, component); |
- | 265 | if (tmp && tmp->mp_data.mp_active) { |
|
- | 266 | if (next > last) |
|
- | 267 | next = last = first; |
|
- | 268 | else |
|
- | 269 | next--; |
|
- | 270 | ||
- | 271 | ipc_forward_slow(rid, tmp->mp_data.phone, VFS_LOOKUP, |
|
- | 272 | next, last, tmp->mp_data.dev_handle, lflag, index, |
|
- | 273 | IPC_FF_ROUTE_FROM_ME); |
|
- | 274 | ops->node_put(cur); |
|
- | 275 | ops->node_put(tmp); |
|
- | 276 | if (par) |
|
- | 277 | ops->node_put(par); |
|
- | 278 | return; |
|
- | 279 | } |
|
177 | 280 | ||
178 | /* handle miss: match amongst siblings */ |
281 | /* handle miss: match amongst siblings */ |
179 | if (!tmp) { |
282 | if (!tmp) { |
180 | if (next <= last) { |
283 | if (next <= last) { |
181 | /* there are unprocessed components */ |
284 | /* there are unprocessed components */ |
Line 187... | Line 290... | ||
187 | /* request to create a new link */ |
290 | /* request to create a new link */ |
188 | if (!ops->is_directory(cur)) { |
291 | if (!ops->is_directory(cur)) { |
189 | ipc_answer_0(rid, ENOTDIR); |
292 | ipc_answer_0(rid, ENOTDIR); |
190 | goto out; |
293 | goto out; |
191 | } |
294 | } |
192 | void *nodep; |
295 | fs_node_t *fn; |
193 | if (lflag & L_CREATE) |
296 | if (lflag & L_CREATE) |
194 | nodep = ops->create(dev_handle, lflag); |
297 | fn = ops->create(dev_handle, lflag); |
195 | else |
298 | else |
196 | nodep = ops->node_get(dev_handle, |
299 | fn = ops->node_get(dev_handle, |
197 | index); |
300 | index); |
198 | if (nodep) { |
301 | if (fn) { |
199 | int rc; |
302 | int rc; |
200 | 303 | ||
201 | rc = ops->link(cur, nodep, component); |
304 | rc = ops->link(cur, fn, component); |
202 | if (rc != EOK) { |
305 | if (rc != EOK) { |
203 | if (lflag & L_CREATE) { |
306 | if (lflag & L_CREATE) { |
204 | (void)ops->destroy( |
307 | (void)ops->destroy(fn); |
205 | nodep); |
- | |
206 | } |
308 | } |
207 | ipc_answer_0(rid, rc); |
309 | ipc_answer_0(rid, rc); |
208 | } else { |
310 | } else { |
209 | ipc_answer_5(rid, EOK, |
311 | ipc_answer_5(rid, EOK, |
210 | fs_handle, dev_handle, |
312 | fs_handle, dev_handle, |
211 | ops->index_get(nodep), |
313 | ops->index_get(fn), |
212 | ops->size_get(nodep), |
314 | ops->size_get(fn), |
213 | ops->lnkcnt_get(nodep)); |
315 | ops->lnkcnt_get(fn)); |
214 | ops->node_put(nodep); |
316 | ops->node_put(fn); |
215 | } |
317 | } |
216 | } else { |
318 | } else { |
217 | ipc_answer_0(rid, ENOSPC); |
319 | ipc_answer_0(rid, ENOSPC); |
218 | } |
320 | } |
219 | goto out; |
321 | goto out; |
220 | } else if (lflag & L_PARENT) { |
- | |
221 | /* return parent */ |
- | |
222 | ipc_answer_5(rid, EOK, fs_handle, dev_handle, |
- | |
223 | ops->index_get(cur), ops->size_get(cur), |
- | |
224 | ops->lnkcnt_get(cur)); |
- | |
225 | } |
322 | } |
226 | ipc_answer_0(rid, ENOENT); |
323 | ipc_answer_0(rid, ENOENT); |
227 | goto out; |
324 | goto out; |
228 | } |
325 | } |
229 | 326 | ||
Line 261... | Line 358... | ||
261 | next++; /* process next character */ |
358 | next++; /* process next character */ |
262 | } |
359 | } |
263 | assert(len); |
360 | assert(len); |
264 | component[len] = '\0'; |
361 | component[len] = '\0'; |
265 | 362 | ||
266 | void *nodep; |
363 | fs_node_t *fn; |
267 | if (lflag & L_CREATE) |
364 | if (lflag & L_CREATE) |
268 | nodep = ops->create(dev_handle, lflag); |
365 | fn = ops->create(dev_handle, lflag); |
269 | else |
366 | else |
270 | nodep = ops->node_get(dev_handle, index); |
367 | fn = ops->node_get(dev_handle, index); |
271 | if (nodep) { |
368 | if (fn) { |
272 | int rc; |
369 | int rc; |
273 | 370 | ||
274 | rc = ops->link(cur, nodep, component); |
371 | rc = ops->link(cur, fn, component); |
275 | if (rc != EOK) { |
372 | if (rc != EOK) { |
276 | if (lflag & L_CREATE) |
373 | if (lflag & L_CREATE) |
277 | (void)ops->destroy(nodep); |
374 | (void)ops->destroy(fn); |
278 | ipc_answer_0(rid, rc); |
375 | ipc_answer_0(rid, rc); |
279 | } else { |
376 | } else { |
280 | ipc_answer_5(rid, EOK, |
377 | ipc_answer_5(rid, EOK, |
281 | fs_handle, dev_handle, |
378 | fs_handle, dev_handle, |
282 | ops->index_get(nodep), |
379 | ops->index_get(fn), |
283 | ops->size_get(nodep), |
380 | ops->size_get(fn), |
284 | ops->lnkcnt_get(nodep)); |
381 | ops->lnkcnt_get(fn)); |
285 | ops->node_put(nodep); |
382 | ops->node_put(fn); |
286 | } |
383 | } |
287 | } else { |
384 | } else { |
288 | ipc_answer_0(rid, ENOSPC); |
385 | ipc_answer_0(rid, ENOSPC); |
289 | } |
386 | } |
290 | goto out; |
387 | goto out; |
Line 292... | Line 389... | ||
292 | ipc_answer_0(rid, ENOENT); |
389 | ipc_answer_0(rid, ENOENT); |
293 | goto out; |
390 | goto out; |
294 | } |
391 | } |
295 | 392 | ||
296 | /* handle hit */ |
393 | /* handle hit */ |
297 | if (lflag & L_PARENT) { |
- | |
298 | ops->node_put(cur); |
- | |
299 | cur = par; |
- | |
300 | par = NULL; |
- | |
301 | if (!cur) { |
- | |
302 | ipc_answer_0(rid, ENOENT); |
- | |
303 | goto out; |
- | |
304 | } |
- | |
305 | } |
- | |
306 | if (lflag & L_UNLINK) { |
394 | if (lflag & L_UNLINK) { |
307 | unsigned old_lnkcnt = ops->lnkcnt_get(cur); |
395 | unsigned old_lnkcnt = ops->lnkcnt_get(cur); |
308 | int res = ops->unlink(par, cur); |
396 | int res = ops->unlink(par, cur, component); |
309 | ipc_answer_5(rid, (ipcarg_t)res, fs_handle, dev_handle, |
397 | ipc_answer_5(rid, (ipcarg_t)res, fs_handle, dev_handle, |
310 | ops->index_get(cur), ops->size_get(cur), old_lnkcnt); |
398 | ops->index_get(cur), ops->size_get(cur), old_lnkcnt); |
311 | goto out; |
399 | goto out; |
312 | } |
400 | } |
313 | if (((lflag & (L_CREATE | L_EXCLUSIVE)) == (L_CREATE | L_EXCLUSIVE)) || |
401 | if (((lflag & (L_CREATE | L_EXCLUSIVE)) == (L_CREATE | L_EXCLUSIVE)) || |