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Line 48... | Line 48... | ||
48 | #include <assert.h> |
48 | #include <assert.h> |
49 | #include <sys/types.h> |
49 | #include <sys/types.h> |
50 | #include <libadt/hash_table.h> |
50 | #include <libadt/hash_table.h> |
51 | #include <as.h> |
51 | #include <as.h> |
52 | #include <libfs.h> |
52 | #include <libfs.h> |
53 | #include <ipc/services.h> |
- | |
54 | #include <ipc/devmap.h> |
- | |
55 | #include <sys/mman.h> |
- | |
56 | #include <byteorder.h> |
- | |
57 | 53 | ||
58 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
54 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
59 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
55 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
60 | 56 | ||
61 | #define DENTRIES_BUCKETS 256 |
57 | #define DENTRIES_BUCKETS 256 |
62 | 58 | ||
63 | #define NAMES_BUCKETS 4 |
59 | #define NAMES_BUCKETS 4 |
64 | 60 | ||
65 | #define BLOCK_SIZE 1024 // FIXME |
- | |
66 | #define RD_BASE 1024 // FIXME |
- | |
67 | #define RD_READ_BLOCK (RD_BASE + 1) |
- | |
68 | - | ||
69 | /* |
61 | /* |
70 | * For now, we don't distinguish between different dev_handles/instances. All |
62 | * For now, we don't distinguish between different dev_handles/instances. All |
71 | * requests resolve to the only instance, rooted in the following variable. |
63 | * requests resolve to the only instance, rooted in the following variable. |
72 | */ |
64 | */ |
73 | static tmpfs_dentry_t *root; |
65 | static tmpfs_dentry_t *root; |
Line 146... | Line 138... | ||
146 | }; |
138 | }; |
147 | 139 | ||
148 | /** Hash table of all directory entries. */ |
140 | /** Hash table of all directory entries. */ |
149 | hash_table_t dentries; |
141 | hash_table_t dentries; |
150 | 142 | ||
151 | struct rdentry { |
- | |
152 | uint8_t type; |
- | |
153 | uint32_t len; |
- | |
154 | } __attribute__((packed)); |
- | |
155 | - | ||
156 | /* Implementation of hash table interface for the dentries hash table. */ |
143 | /* Implementation of hash table interface for the dentries hash table. */ |
157 | static hash_index_t dentries_hash(unsigned long *key) |
144 | static hash_index_t dentries_hash(unsigned long *key) |
158 | { |
145 | { |
159 | return *key % DENTRIES_BUCKETS; |
146 | return *key % DENTRIES_BUCKETS; |
160 | } |
147 | } |
Line 248... | Line 235... | ||
248 | } |
235 | } |
249 | root->lnkcnt = 1; |
236 | root->lnkcnt = 1; |
250 | return true; |
237 | return true; |
251 | } |
238 | } |
252 | 239 | ||
253 | static bool tmpfs_blockread(int phone, void *buffer, size_t *bufpos, size_t *buflen, size_t *pos, void *dst, size_t size) |
- | |
254 | { |
- | |
255 | size_t offset = 0; |
- | |
256 | size_t left = size; |
- | |
257 | - | ||
258 | while (left > 0) { |
- | |
259 | size_t rd; |
- | |
260 | - | ||
261 | if (*bufpos + left < *buflen) |
- | |
262 | rd = left; |
- | |
263 | else |
- | |
264 | rd = *buflen - *bufpos; |
- | |
265 | - | ||
266 | if (rd > 0) { |
- | |
267 | memcpy(dst + offset, buffer + *bufpos, rd); |
- | |
268 | offset += rd; |
- | |
269 | *bufpos += rd; |
- | |
270 | *pos += rd; |
- | |
271 | left -= rd; |
- | |
272 | } |
- | |
273 | - | ||
274 | if (*bufpos == *buflen) { |
- | |
275 | ipcarg_t retval; |
- | |
276 | int rc = ipc_call_sync_2_1(phone, RD_READ_BLOCK, |
- | |
277 | *pos / BLOCK_SIZE, BLOCK_SIZE, |
- | |
278 | &retval); |
- | |
279 | if ((rc != EOK) || (retval != EOK)) |
- | |
280 | return false; |
- | |
281 | - | ||
282 | *bufpos = 0; |
- | |
283 | *buflen = BLOCK_SIZE; |
- | |
284 | } |
- | |
285 | } |
- | |
286 | - | ||
287 | return true; |
- | |
288 | } |
- | |
289 | - | ||
290 | static bool tmpfs_restore_recursion(int phone, void *block, size_t *bufpos, size_t *buflen, size_t *pos, tmpfs_dentry_t *parent) |
- | |
291 | { |
- | |
292 | struct rdentry entry; |
- | |
293 | - | ||
294 | do { |
- | |
295 | char *fname; |
- | |
296 | tmpfs_dentry_t *node; |
- | |
297 | uint32_t size; |
- | |
298 | - | ||
299 | if (!tmpfs_blockread(phone, block, bufpos, buflen, pos, &entry, sizeof(entry))) |
- | |
300 | return false; |
- | |
301 | - | ||
302 | entry.len = uint32_t_le2host(entry.len); |
- | |
303 | - | ||
304 | switch (entry.type) { |
- | |
305 | case 0: |
- | |
306 | break; |
- | |
307 | case 1: |
- | |
308 | fname = malloc(entry.len + 1); |
- | |
309 | if (fname == NULL) |
- | |
310 | return false; |
- | |
311 | - | ||
312 | node = (tmpfs_dentry_t *) tmpfs_create_node(L_FILE); |
- | |
313 | if (node == NULL) { |
- | |
314 | free(fname); |
- | |
315 | return false; |
- | |
316 | } |
- | |
317 | - | ||
318 | if (!tmpfs_blockread(phone, block, bufpos, buflen, pos, fname, entry.len)) { |
- | |
319 | tmpfs_destroy_node((void *) node); |
- | |
320 | free(fname); |
- | |
321 | return false; |
- | |
322 | } |
- | |
323 | fname[entry.len] = 0; |
- | |
324 | - | ||
325 | if (!tmpfs_link_node((void *) parent, (void *) node, fname)) { |
- | |
326 | tmpfs_destroy_node((void *) node); |
- | |
327 | free(fname); |
- | |
328 | return false; |
- | |
329 | } |
- | |
330 | free(fname); |
- | |
331 | - | ||
332 | if (!tmpfs_blockread(phone, block, bufpos, buflen, pos, &size, sizeof(size))) |
- | |
333 | return false; |
- | |
334 | - | ||
335 | size = uint32_t_le2host(size); |
- | |
336 | - | ||
337 | node->data = malloc(size); |
- | |
338 | if (node->data == NULL) |
- | |
339 | return false; |
- | |
340 | - | ||
341 | node->size = size; |
- | |
342 | if (!tmpfs_blockread(phone, block, bufpos, buflen, pos, node->data, size)) |
- | |
343 | return false; |
- | |
344 | - | ||
345 | break; |
- | |
346 | case 2: |
- | |
347 | fname = malloc(entry.len + 1); |
- | |
348 | if (fname == NULL) |
- | |
349 | return false; |
- | |
350 | - | ||
351 | node = (tmpfs_dentry_t *) tmpfs_create_node(L_DIRECTORY); |
- | |
352 | if (node == NULL) { |
- | |
353 | free(fname); |
- | |
354 | return false; |
- | |
355 | } |
- | |
356 | - | ||
357 | if (!tmpfs_blockread(phone, block, bufpos, buflen, pos, fname, entry.len)) { |
- | |
358 | tmpfs_destroy_node((void *) node); |
- | |
359 | free(fname); |
- | |
360 | return false; |
- | |
361 | } |
- | |
362 | fname[entry.len] = 0; |
- | |
363 | - | ||
364 | if (!tmpfs_link_node((void *) parent, (void *) node, fname)) { |
- | |
365 | tmpfs_destroy_node((void *) node); |
- | |
366 | free(fname); |
- | |
367 | return false; |
- | |
368 | } |
- | |
369 | free(fname); |
- | |
370 | - | ||
371 | if (!tmpfs_restore_recursion(phone, block, bufpos, buflen, pos, node)) |
- | |
372 | return false; |
- | |
373 | - | ||
374 | break; |
- | |
375 | default: |
- | |
376 | return false; |
- | |
377 | } |
- | |
378 | } while (entry.type != 0); |
- | |
379 | - | ||
380 | return true; |
- | |
381 | } |
- | |
382 | - | ||
383 | static bool tmpfs_restore(dev_handle_t dev) |
- | |
384 | { |
- | |
385 | void *block = mmap(NULL, BLOCK_SIZE, |
- | |
386 | PROTO_READ | PROTO_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); |
- | |
387 | - | ||
388 | if (block == NULL) |
- | |
389 | return false; |
- | |
390 | - | ||
391 | int phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CONNECT_TO_DEVICE, dev); |
- | |
392 | - | ||
393 | if (phone < 0) { |
- | |
394 | munmap(block, BLOCK_SIZE); |
- | |
395 | return false; |
- | |
396 | } |
- | |
397 | - | ||
398 | if (ipc_share_out_start(phone, block, AS_AREA_READ | AS_AREA_WRITE) != EOK) |
- | |
399 | goto error; |
- | |
400 | - | ||
401 | size_t bufpos = 0; |
- | |
402 | size_t buflen = 0; |
- | |
403 | size_t pos = 0; |
- | |
404 | - | ||
405 | char tag[6]; |
- | |
406 | if (!tmpfs_blockread(phone, block, &bufpos, &buflen, &pos, tag, 5)) |
- | |
407 | goto error; |
- | |
408 | - | ||
409 | tag[5] = 0; |
- | |
410 | if (strcmp(tag, "TMPFS") != 0) |
- | |
411 | goto error; |
- | |
412 | - | ||
413 | if (!tmpfs_restore_recursion(phone, block, &bufpos, &buflen, &pos, root)) |
- | |
414 | goto error; |
- | |
415 | - | ||
416 | ipc_hangup(phone); |
- | |
417 | munmap(block, BLOCK_SIZE); |
- | |
418 | return true; |
- | |
419 | - | ||
420 | error: |
- | |
421 | ipc_hangup(phone); |
- | |
422 | munmap(block, BLOCK_SIZE); |
- | |
423 | return false; |
- | |
424 | } |
- | |
425 | - | ||
426 | /** Compare one component of path to a directory entry. |
240 | /** Compare one component of path to a directory entry. |
427 | * |
241 | * |
428 | * @param parentp Pointer to node from which we descended. |
242 | * @param parentp Pointer to node from which we descended. |
429 | * @param childp Pointer to node to compare the path component with. |
243 | * @param childp Pointer to node to compare the path component with. |
430 | * @param component Array of characters holding component name. |
244 | * @param component Array of characters holding component name. |