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| Rev 3503 | Rev 3505 | ||
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| Line 34... | Line 34... | ||
| 34 | * @file fat_ops.c |
34 | * @file fat_ops.c |
| 35 | * @brief Implementation of VFS operations for the FAT file system server. |
35 | * @brief Implementation of VFS operations for the FAT file system server. |
| 36 | */ |
36 | */ |
| 37 | 37 | ||
| 38 | #include "fat.h" |
38 | #include "fat.h" |
| - | 39 | #include "fat_dentry.h" |
|
| - | 40 | #include "fat_fat.h" |
|
| 39 | #include "../../vfs/vfs.h" |
41 | #include "../../vfs/vfs.h" |
| 40 | #include <libfs.h> |
42 | #include <libfs.h> |
| 41 | #include <ipc/ipc.h> |
43 | #include <ipc/ipc.h> |
| 42 | #include <ipc/services.h> |
44 | #include <ipc/services.h> |
| 43 | #include <ipc/devmap.h> |
45 | #include <ipc/devmap.h> |
| Line 59... | Line 61... | ||
| 59 | static futex_t ffn_futex = FUTEX_INITIALIZER; |
61 | static futex_t ffn_futex = FUTEX_INITIALIZER; |
| 60 | 62 | ||
| 61 | /** List of cached free FAT nodes. */ |
63 | /** List of cached free FAT nodes. */ |
| 62 | static LIST_INITIALIZE(ffn_head); |
64 | static LIST_INITIALIZE(ffn_head); |
| 63 | 65 | ||
| 64 | #define FAT_NAME_LEN 8 |
- | |
| 65 | #define FAT_EXT_LEN 3 |
- | |
| 66 | - | ||
| 67 | #define FAT_PAD ' ' |
- | |
| 68 | - | ||
| 69 | #define FAT_DENTRY_UNUSED 0x00 |
- | |
| 70 | #define FAT_DENTRY_E5_ESC 0x05 |
- | |
| 71 | #define FAT_DENTRY_DOT 0x2e |
- | |
| 72 | #define FAT_DENTRY_ERASED 0xe5 |
- | |
| 73 | - | ||
| 74 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
66 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
| 75 | 67 | ||
| 76 | static void dentry_name_canonify(fat_dentry_t *d, char *buf) |
- | |
| 77 | { |
- | |
| 78 | int i; |
- | |
| 79 | - | ||
| 80 | for (i = 0; i < FAT_NAME_LEN; i++) { |
- | |
| 81 | if (d->name[i] == FAT_PAD) |
- | |
| 82 | break; |
- | |
| 83 | if (d->name[i] == FAT_DENTRY_E5_ESC) |
- | |
| 84 | *buf++ = 0xe5; |
- | |
| 85 | else |
- | |
| 86 | *buf++ = d->name[i]; |
- | |
| 87 | } |
- | |
| 88 | if (d->ext[0] != FAT_PAD) |
- | |
| 89 | *buf++ = '.'; |
- | |
| 90 | for (i = 0; i < FAT_EXT_LEN; i++) { |
- | |
| 91 | if (d->ext[i] == FAT_PAD) { |
- | |
| 92 | *buf = '\0'; |
- | |
| 93 | return; |
- | |
| 94 | } |
- | |
| 95 | if (d->ext[i] == FAT_DENTRY_E5_ESC) |
- | |
| 96 | *buf++ = 0xe5; |
- | |
| 97 | else |
- | |
| 98 | *buf++ = d->ext[i]; |
- | |
| 99 | } |
- | |
| 100 | *buf = '\0'; |
- | |
| 101 | } |
- | |
| 102 | - | ||
| 103 | static int dev_phone = -1; /* FIXME */ |
68 | static int dev_phone = -1; /* FIXME */ |
| 104 | static void *dev_buffer = NULL; /* FIXME */ |
69 | static void *dev_buffer = NULL; /* FIXME */ |
| 105 | 70 | ||
| 106 | /* TODO move somewhere else */ |
71 | /* TODO move somewhere else */ |
| 107 | typedef struct { |
72 | typedef struct { |
| Line 297... | Line 262... | ||
| 297 | block_put(bb); |
262 | block_put(bb); |
| 298 | 263 | ||
| 299 | return bps; |
264 | return bps; |
| 300 | } |
265 | } |
| 301 | 266 | ||
| 302 | typedef enum { |
- | |
| 303 | FAT_DENTRY_SKIP, |
- | |
| 304 | FAT_DENTRY_LAST, |
- | |
| 305 | FAT_DENTRY_VALID |
- | |
| 306 | } fat_dentry_clsf_t; |
- | |
| 307 | - | ||
| 308 | static fat_dentry_clsf_t fat_classify_dentry(fat_dentry_t *d) |
- | |
| 309 | { |
- | |
| 310 | if (d->attr & FAT_ATTR_VOLLABEL) { |
- | |
| 311 | /* volume label entry */ |
- | |
| 312 | return FAT_DENTRY_SKIP; |
- | |
| 313 | } |
- | |
| 314 | if (d->name[0] == FAT_DENTRY_ERASED) { |
- | |
| 315 | /* not-currently-used entry */ |
- | |
| 316 | return FAT_DENTRY_SKIP; |
- | |
| 317 | } |
- | |
| 318 | if (d->name[0] == FAT_DENTRY_UNUSED) { |
- | |
| 319 | /* never used entry */ |
- | |
| 320 | return FAT_DENTRY_LAST; |
- | |
| 321 | } |
- | |
| 322 | if (d->name[0] == FAT_DENTRY_DOT) { |
- | |
| 323 | /* |
- | |
| 324 | * Most likely '.' or '..'. |
- | |
| 325 | * It cannot occur in a regular file name. |
- | |
| 326 | */ |
- | |
| 327 | return FAT_DENTRY_SKIP; |
- | |
| 328 | } |
- | |
| 329 | return FAT_DENTRY_VALID; |
- | |
| 330 | } |
- | |
| 331 | - | ||
| 332 | static void fat_node_sync(fat_node_t *node) |
267 | static void fat_node_sync(fat_node_t *node) |
| 333 | { |
268 | { |
| 334 | /* TODO */ |
269 | /* TODO */ |
| 335 | } |
270 | } |
| 336 | 271 | ||