1 |
|
|
/*************************************************************************** |
2 |
|
|
* Copyright (c) 2024 Microsoft Corporation |
3 |
|
|
* |
4 |
|
|
* This program and the accompanying materials are made available under the |
5 |
|
|
* terms of the MIT License which is available at |
6 |
|
|
* https://opensource.org/licenses/MIT. |
7 |
|
|
* |
8 |
|
|
* SPDX-License-Identifier: MIT |
9 |
|
|
**************************************************************************/ |
10 |
|
|
|
11 |
|
|
|
12 |
|
|
/**************************************************************************/ |
13 |
|
|
/**************************************************************************/ |
14 |
|
|
/** */ |
15 |
|
|
/** FileX Component */ |
16 |
|
|
/** */ |
17 |
|
|
/** File */ |
18 |
|
|
/** */ |
19 |
|
|
/**************************************************************************/ |
20 |
|
|
/**************************************************************************/ |
21 |
|
|
|
22 |
|
|
#define FX_SOURCE_CODE |
23 |
|
|
|
24 |
|
|
|
25 |
|
|
/* Include necessary system files. */ |
26 |
|
|
|
27 |
|
|
#include "fx_api.h" |
28 |
|
|
#include "fx_system.h" |
29 |
|
|
#include "fx_file.h" |
30 |
|
|
#include "fx_utility.h" |
31 |
|
|
#include "fx_directory.h" |
32 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
33 |
|
|
#include "fx_fault_tolerant.h" |
34 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
35 |
|
|
|
36 |
|
|
|
37 |
|
|
/**************************************************************************/ |
38 |
|
|
/* */ |
39 |
|
|
/* FUNCTION RELEASE */ |
40 |
|
|
/* */ |
41 |
|
|
/* _fx_file_extended_allocate PORTABLE C */ |
42 |
|
|
/* 6.1 */ |
43 |
|
|
/* AUTHOR */ |
44 |
|
|
/* */ |
45 |
|
|
/* William E. Lamie, Microsoft Corporation */ |
46 |
|
|
/* */ |
47 |
|
|
/* DESCRIPTION */ |
48 |
|
|
/* */ |
49 |
|
|
/* This function attempts to allocate the number of consecutive */ |
50 |
|
|
/* clusters required to satisfy the user's request. If there are */ |
51 |
|
|
/* enough clusters, the clusters are allocated and linked to the file. */ |
52 |
|
|
/* Otherwise, if there are not enough consecutive clusters, an error */ |
53 |
|
|
/* code is returned to the caller. */ |
54 |
|
|
/* */ |
55 |
|
|
/* INPUT */ |
56 |
|
|
/* */ |
57 |
|
|
/* file_ptr File control block pointer */ |
58 |
|
|
/* size Number of bytes to allocate */ |
59 |
|
|
/* */ |
60 |
|
|
/* OUTPUT */ |
61 |
|
|
/* */ |
62 |
|
|
/* return status */ |
63 |
|
|
/* */ |
64 |
|
|
/* CALLS */ |
65 |
|
|
/* */ |
66 |
|
|
/* _fx_directory_entry_write Update directory entry */ |
67 |
|
|
/* _fx_utility_FAT_entry_read Read a FAT entry */ |
68 |
|
|
/* _fx_utility_FAT_entry_write Write a FAT entry */ |
69 |
|
|
/* _fx_utility_FAT_flush Flush written FAT entries */ |
70 |
|
|
/* _fx_utility_logical_sector_flush Flush the written log sector */ |
71 |
|
|
/* _fx_fault_tolerant_transaction_start Start fault tolerant */ |
72 |
|
|
/* transaction */ |
73 |
|
|
/* _fx_fault_tolerant_transaction_end End fault tolerant transaction*/ |
74 |
|
|
/* _fx_fault_tolerant_recover Recover FAT chain */ |
75 |
|
|
/* _fx_fault_tolerant_reset_log_file Reset the log file */ |
76 |
|
|
/* _fx_fault_tolerant_set_FAT_chain Set data of FAT chain */ |
77 |
|
|
/* */ |
78 |
|
|
/* CALLED BY */ |
79 |
|
|
/* */ |
80 |
|
|
/* Application Code */ |
81 |
|
|
/* */ |
82 |
|
|
/* RELEASE HISTORY */ |
83 |
|
|
/* */ |
84 |
|
|
/* DATE NAME DESCRIPTION */ |
85 |
|
|
/* */ |
86 |
|
|
/* 05-19-2020 William E. Lamie Initial Version 6.0 */ |
87 |
|
|
/* 09-30-2020 William E. Lamie Modified comment(s), */ |
88 |
|
|
/* resulting in version 6.1 */ |
89 |
|
|
/* */ |
90 |
|
|
/**************************************************************************/ |
91 |
|
27 |
UINT _fx_file_extended_allocate(FX_FILE *file_ptr, ULONG64 size) |
92 |
|
|
{ |
93 |
|
|
|
94 |
|
|
UINT status; |
95 |
|
|
ULONG i; |
96 |
|
|
UINT found; |
97 |
|
|
ULONG bytes_per_cluster; |
98 |
|
|
ULONG FAT_index; |
99 |
|
|
ULONG FAT_value; |
100 |
|
|
ULONG clusters; |
101 |
|
|
FX_MEDIA *media_ptr; |
102 |
|
|
|
103 |
|
|
#ifdef TX_ENABLE_EVENT_TRACE |
104 |
|
|
TX_TRACE_BUFFER_ENTRY *trace_event; |
105 |
|
|
ULONG trace_timestamp; |
106 |
|
|
#endif |
107 |
|
|
|
108 |
|
|
|
109 |
|
|
/* First, determine if the file is still open. */ |
110 |
✓✓ |
27 |
if (file_ptr -> fx_file_id != FX_FILE_ID) |
111 |
|
|
{ |
112 |
|
|
|
113 |
|
|
/* Return the file not open error status. */ |
114 |
|
1 |
return(FX_NOT_OPEN); |
115 |
|
|
} |
116 |
|
|
|
117 |
|
|
/* Setup pointer to media structure. */ |
118 |
|
26 |
media_ptr = file_ptr -> fx_file_media_ptr; |
119 |
|
|
|
120 |
|
|
#ifndef FX_MEDIA_STATISTICS_DISABLE |
121 |
|
|
|
122 |
|
|
/* Increment the number of times this service has been called. */ |
123 |
|
26 |
media_ptr -> fx_media_file_allocates++; |
124 |
|
|
#endif |
125 |
|
|
|
126 |
|
|
/* Make sure this file is open for writing. */ |
127 |
✓✓ |
26 |
if (file_ptr -> fx_file_open_mode != FX_OPEN_FOR_WRITE) |
128 |
|
|
{ |
129 |
|
|
|
130 |
|
|
/* Return the access error exception - a write was attempted from |
131 |
|
|
a file opened for reading! */ |
132 |
|
1 |
return(FX_ACCESS_ERROR); |
133 |
|
|
} |
134 |
|
|
|
135 |
|
|
/* Determine if the requested allocation is for zero bytes. */ |
136 |
✓✓ |
25 |
if (size == 0) |
137 |
|
|
{ |
138 |
|
|
|
139 |
|
|
/* Return a successful completion - nothing needs to be done. */ |
140 |
|
1 |
return(FX_SUCCESS); |
141 |
|
|
} |
142 |
|
|
|
143 |
|
|
/* Setup pointer to associated media control block. */ |
144 |
|
24 |
media_ptr = file_ptr -> fx_file_media_ptr; |
145 |
|
|
|
146 |
|
|
/* If trace is enabled, insert this event into the trace buffer. */ |
147 |
|
|
FX_TRACE_IN_LINE_INSERT(FX_TRACE_FILE_ALLOCATE, file_ptr, size, file_ptr -> fx_file_current_available_size, 0, FX_TRACE_FILE_EVENTS, &trace_event, &trace_timestamp) |
148 |
|
|
|
149 |
|
|
/* Protect against other threads accessing the media. */ |
150 |
|
24 |
FX_PROTECT |
151 |
|
|
|
152 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
153 |
|
|
/* Start transaction. */ |
154 |
|
|
_fx_fault_tolerant_transaction_start(media_ptr); |
155 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
156 |
|
|
|
157 |
|
|
/* Check for write protect at the media level (set by driver). */ |
158 |
✓✓ |
24 |
if (media_ptr -> fx_media_driver_write_protect) |
159 |
|
|
{ |
160 |
|
|
|
161 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
162 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
163 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
164 |
|
|
|
165 |
|
|
/* Release media protection. */ |
166 |
|
1 |
FX_UNPROTECT |
167 |
|
|
|
168 |
|
|
/* Return write protect error. */ |
169 |
|
1 |
return(FX_WRITE_PROTECT); |
170 |
|
|
} |
171 |
|
|
|
172 |
|
|
/* Calculate the number of bytes per cluster. */ |
173 |
|
23 |
bytes_per_cluster = ((ULONG)media_ptr -> fx_media_bytes_per_sector) * |
174 |
|
23 |
((ULONG)media_ptr -> fx_media_sectors_per_cluster); |
175 |
|
|
|
176 |
|
|
/* Check for invalid value. */ |
177 |
✓✓ |
23 |
if (bytes_per_cluster == 0) |
178 |
|
|
{ |
179 |
|
|
|
180 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
181 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
182 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
183 |
|
|
|
184 |
|
|
/* Release media protection. */ |
185 |
|
1 |
FX_UNPROTECT |
186 |
|
|
|
187 |
|
|
/* Invalid media, return error. */ |
188 |
|
1 |
return(FX_MEDIA_INVALID); |
189 |
|
|
} |
190 |
|
|
|
191 |
|
|
/* Calculate the number of consecutive clusters needed to satisfy this |
192 |
|
|
request. */ |
193 |
|
22 |
clusters = (ULONG)(((size + bytes_per_cluster - 1) / bytes_per_cluster)); |
194 |
|
|
|
195 |
|
|
/* Determine if cluster count is 0. */ |
196 |
✓✓ |
22 |
if (clusters == 0) |
197 |
|
|
{ |
198 |
|
|
|
199 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
200 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
201 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
202 |
|
|
|
203 |
|
|
/* Release media protection. */ |
204 |
|
1 |
FX_UNPROTECT |
205 |
|
|
|
206 |
|
|
/* Size overflow when rounding to the next cluster, return an error status. */ |
207 |
|
1 |
return(FX_NO_MORE_SPACE); |
208 |
|
|
} |
209 |
|
|
|
210 |
|
|
/* Determine if there are enough available clusters on the media. */ |
211 |
✓✓ |
21 |
if (clusters > media_ptr -> fx_media_available_clusters) |
212 |
|
|
{ |
213 |
|
|
|
214 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
215 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
216 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
217 |
|
|
|
218 |
|
|
/* Release media protection. */ |
219 |
|
1 |
FX_UNPROTECT |
220 |
|
|
|
221 |
|
|
/* Not enough clusters, return an error status. */ |
222 |
|
1 |
return(FX_NO_MORE_SPACE); |
223 |
|
|
} |
224 |
|
|
|
225 |
|
|
/* Determine if the requested file allocation would exceed the physical limit of the file. */ |
226 |
✓✓ |
20 |
if (((file_ptr -> fx_file_current_available_size + (((ULONG64) clusters) * ((ULONG64) bytes_per_cluster))) < file_ptr -> fx_file_current_available_size) || |
227 |
✓✓ |
19 |
((file_ptr -> fx_file_current_available_size + (((ULONG64) clusters) * ((ULONG64) bytes_per_cluster))) > 0xFFFFFFFFULL)) |
228 |
|
|
{ |
229 |
|
|
|
230 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
231 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
232 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
233 |
|
|
|
234 |
|
|
/* Release media protection. */ |
235 |
|
2 |
FX_UNPROTECT |
236 |
|
|
|
237 |
|
|
/* Return the no more space error, since the new file size would be larger than |
238 |
|
|
the 32-bit field to represent it in the file's directory entry. */ |
239 |
|
2 |
return(FX_NO_MORE_SPACE); |
240 |
|
|
} |
241 |
|
|
|
242 |
|
|
/* Now we need to find the consecutive clusters. */ |
243 |
|
18 |
FAT_index = FX_FAT_ENTRY_START; |
244 |
|
18 |
found = FX_FALSE; |
245 |
|
|
|
246 |
|
|
|
247 |
✓✓ |
6957 |
while (FAT_index <= (media_ptr -> fx_media_total_clusters - clusters + FX_FAT_ENTRY_START)) |
248 |
|
|
{ |
249 |
|
|
|
250 |
|
|
/* Determine if enough consecutive FAT entries are available. */ |
251 |
|
6956 |
i = 0; |
252 |
|
|
|
253 |
|
|
|
254 |
|
|
do |
255 |
|
|
{ |
256 |
|
|
|
257 |
|
|
/* Read a FAT entry. */ |
258 |
|
7224 |
status = _fx_utility_FAT_entry_read(media_ptr, (FAT_index + i), &FAT_value); |
259 |
|
|
|
260 |
|
|
/* Check for a successful status. */ |
261 |
✓✓ |
7224 |
if (status != FX_SUCCESS) |
262 |
|
|
{ |
263 |
|
|
|
264 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
265 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
266 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
267 |
|
|
|
268 |
|
|
/* Release media protection. */ |
269 |
|
1 |
FX_UNPROTECT |
270 |
|
|
|
271 |
|
|
/* Return the error status. */ |
272 |
|
1 |
return(status); |
273 |
|
|
} |
274 |
|
|
|
275 |
|
|
/* Determine if the entry is free. */ |
276 |
✓✓ |
7223 |
if (FAT_value != FX_FREE_CLUSTER) |
277 |
|
|
{ |
278 |
|
6939 |
break; |
279 |
|
|
} |
280 |
|
|
|
281 |
|
|
/* Otherwise, increment the consecutive FAT indices. */ |
282 |
|
284 |
i++; |
283 |
✓✓ |
284 |
} while (i < clusters); |
284 |
|
|
|
285 |
|
|
/* Determine if we found enough FAT entries. */ |
286 |
✓✓ |
6955 |
if (i >= clusters) |
287 |
|
|
{ |
288 |
|
|
|
289 |
|
|
/* Yes, we have found enough FAT entries - set the found |
290 |
|
|
flag and get out of this loop. */ |
291 |
|
16 |
found = FX_TRUE; |
292 |
|
16 |
break; |
293 |
|
|
} |
294 |
|
|
else |
295 |
|
|
{ |
296 |
|
|
/* Position to the next possibly free FAT entry. */ |
297 |
|
6939 |
FAT_index = FAT_index + i + 1; |
298 |
|
|
} |
299 |
|
|
} |
300 |
|
|
|
301 |
|
|
/* Determine if we found enough consecutive clusters to satisfy the |
302 |
|
|
request. */ |
303 |
✓✓ |
17 |
if (found) |
304 |
|
|
{ |
305 |
|
|
|
306 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
307 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
308 |
|
|
{ |
309 |
|
|
|
310 |
|
|
/* Record the action that is about to take place. This information |
311 |
|
|
would aid the undo process should fault condition happens. */ |
312 |
|
|
media_ptr -> fx_media_fault_tolerant_state |= FX_FAULT_TOLERANT_STATE_SET_FAT_CHAIN; |
313 |
|
|
_fx_fault_tolerant_set_FAT_chain(media_ptr, FX_FALSE, file_ptr -> fx_file_last_physical_cluster, |
314 |
|
|
FAT_index, media_ptr -> fx_media_fat_last, media_ptr -> fx_media_fat_last); |
315 |
|
|
} |
316 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
317 |
|
|
|
318 |
|
|
|
319 |
|
|
/* Update the link pointers in the new clusters. */ |
320 |
✓✓ |
280 |
for (i = 0; i < (clusters - 1); i++) |
321 |
|
|
{ |
322 |
|
|
|
323 |
|
|
/* Update the cluster links. Since the allocation is |
324 |
|
|
sequential, we just have to link each FAT entry to the |
325 |
|
|
next one. */ |
326 |
|
265 |
status = _fx_utility_FAT_entry_write(media_ptr, FAT_index + i, FAT_index + i + 1); |
327 |
|
|
|
328 |
|
|
/* Check for a bad status. */ |
329 |
✓✓ |
265 |
if (status != FX_SUCCESS) |
330 |
|
|
{ |
331 |
|
|
|
332 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
333 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
334 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
335 |
|
|
|
336 |
|
|
/* Release media protection. */ |
337 |
|
1 |
FX_UNPROTECT |
338 |
|
|
|
339 |
|
|
/* Return the error status. */ |
340 |
|
1 |
return(status); |
341 |
|
|
} |
342 |
|
|
} |
343 |
|
|
|
344 |
|
|
/* Now place an EOF in the last cluster entry. */ |
345 |
|
15 |
status = _fx_utility_FAT_entry_write(media_ptr, FAT_index + clusters - 1, media_ptr -> fx_media_fat_last); |
346 |
|
|
|
347 |
|
|
/* Check for a bad status. */ |
348 |
✓✓ |
15 |
if (status != FX_SUCCESS) |
349 |
|
|
{ |
350 |
|
|
|
351 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
352 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
353 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
354 |
|
|
|
355 |
|
|
/* Release media protection. */ |
356 |
|
1 |
FX_UNPROTECT |
357 |
|
|
|
358 |
|
|
/* Return the error status. */ |
359 |
|
1 |
return(status); |
360 |
|
|
} |
361 |
|
|
|
362 |
|
|
#ifdef FX_FAULT_TOLERANT |
363 |
|
|
|
364 |
|
|
/* Flush the cached individual FAT entries */ |
365 |
|
|
_fx_utility_FAT_flush(media_ptr); |
366 |
|
|
|
367 |
|
|
#endif |
368 |
|
|
|
369 |
|
|
/* Actually link up the new clusters to the file. */ |
370 |
|
|
|
371 |
|
|
/* Determine if there are already clusters allocated for this file. */ |
372 |
✓✓ |
14 |
if (file_ptr -> fx_file_total_clusters) |
373 |
|
|
{ |
374 |
|
|
|
375 |
|
|
/* Linkup the last cluster. */ |
376 |
|
7 |
status = _fx_utility_FAT_entry_write(media_ptr, |
377 |
|
|
file_ptr -> fx_file_last_physical_cluster, FAT_index); |
378 |
|
|
|
379 |
|
|
/* Check for a bad status. */ |
380 |
✓✓ |
7 |
if (status != FX_SUCCESS) |
381 |
|
|
{ |
382 |
|
|
|
383 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
384 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
385 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
386 |
|
|
|
387 |
|
|
/* Release media protection. */ |
388 |
|
1 |
FX_UNPROTECT |
389 |
|
|
|
390 |
|
|
/* Return the error status. */ |
391 |
|
1 |
return(status); |
392 |
|
|
} |
393 |
|
|
|
394 |
|
|
/* Determine if we are adding a sector after a write filled the previously |
395 |
|
|
allocated cluster exactly. */ |
396 |
|
6 |
if ((file_ptr -> fx_file_current_relative_sector >= |
397 |
✓✓ |
6 |
(media_ptr -> fx_media_sectors_per_cluster - 1)) && |
398 |
|
5 |
(file_ptr -> fx_file_current_logical_offset >= |
399 |
✓✓ |
5 |
media_ptr -> fx_media_bytes_per_sector)) |
400 |
|
|
{ |
401 |
|
|
|
402 |
|
|
/* Yes, we need to adjust all of the pertinent file parameters for |
403 |
|
|
access into this newly allocated cluster. */ |
404 |
|
3 |
file_ptr -> fx_file_current_physical_cluster = FAT_index; |
405 |
|
3 |
file_ptr -> fx_file_current_relative_cluster++; |
406 |
|
3 |
file_ptr -> fx_file_current_relative_sector = 0; |
407 |
|
3 |
file_ptr -> fx_file_current_logical_sector = ((ULONG)media_ptr -> fx_media_data_sector_start) + |
408 |
|
3 |
(((ULONG64)(FAT_index - FX_FAT_ENTRY_START)) * |
409 |
|
3 |
((ULONG)media_ptr -> fx_media_sectors_per_cluster)); |
410 |
|
3 |
file_ptr -> fx_file_current_logical_offset = 0; |
411 |
|
|
} |
412 |
|
|
} |
413 |
|
|
else |
414 |
|
|
{ |
415 |
|
|
|
416 |
|
|
/* These new clusters are also the first! Setup the initial |
417 |
|
|
file parameters. */ |
418 |
|
7 |
file_ptr -> fx_file_first_physical_cluster = FAT_index; |
419 |
|
7 |
file_ptr -> fx_file_current_physical_cluster = file_ptr -> fx_file_first_physical_cluster; |
420 |
|
7 |
file_ptr -> fx_file_current_relative_cluster = 0; |
421 |
|
7 |
file_ptr -> fx_file_current_logical_sector = ((ULONG)media_ptr -> fx_media_data_sector_start) + |
422 |
|
7 |
(((ULONG64)(file_ptr -> fx_file_first_physical_cluster - FX_FAT_ENTRY_START)) * |
423 |
|
7 |
((ULONG)media_ptr -> fx_media_sectors_per_cluster)); |
424 |
|
7 |
file_ptr -> fx_file_current_logical_offset = 0; |
425 |
|
7 |
file_ptr -> fx_file_current_file_offset = 0; |
426 |
|
|
|
427 |
|
|
/* Update the first cluster in the directory entry. */ |
428 |
|
7 |
file_ptr -> fx_file_dir_entry.fx_dir_entry_cluster = FAT_index; |
429 |
|
|
} |
430 |
|
|
|
431 |
|
|
/* Remember the last physical cluster. */ |
432 |
|
13 |
file_ptr -> fx_file_last_physical_cluster = FAT_index + clusters - 1; |
433 |
|
|
|
434 |
|
|
|
435 |
|
|
/* Check for wrap-around when updating the available size. */ |
436 |
|
|
/* Update the available size. */ |
437 |
|
13 |
file_ptr -> fx_file_current_available_size = |
438 |
|
13 |
file_ptr -> fx_file_current_available_size + (bytes_per_cluster * clusters); |
439 |
|
|
|
440 |
|
|
|
441 |
|
|
/* Increment the total clusters for this file. */ |
442 |
|
13 |
file_ptr -> fx_file_total_clusters = |
443 |
|
13 |
file_ptr -> fx_file_total_clusters + clusters; |
444 |
|
|
|
445 |
|
|
/* Decrease the available clusters on the media. */ |
446 |
|
13 |
media_ptr -> fx_media_available_clusters = |
447 |
|
13 |
media_ptr -> fx_media_available_clusters - clusters; |
448 |
|
|
|
449 |
|
|
#if defined(FX_UPDATE_FILE_SIZE_ON_ALLOCATE) || defined(FX_ENABLE_FAULT_TOLERANT) |
450 |
|
|
|
451 |
|
|
/* Set the file size the current size plus what what was added. */ |
452 |
|
|
file_ptr -> fx_file_current_file_size += size; |
453 |
|
|
|
454 |
|
|
/* Copy the new file size into the directory entry. */ |
455 |
|
|
file_ptr -> fx_file_dir_entry.fx_dir_entry_file_size = file_ptr -> fx_file_current_file_size; |
456 |
|
|
#endif |
457 |
|
|
|
458 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
459 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
460 |
|
|
{ |
461 |
|
|
|
462 |
|
|
/* Clear undo phase. */ |
463 |
|
|
media_ptr -> fx_media_fault_tolerant_state &= (UCHAR)(~FX_FAULT_TOLERANT_STATE_SET_FAT_CHAIN & 0xff); |
464 |
|
|
} |
465 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
466 |
|
|
|
467 |
|
|
/* Update the trace event with the new size. */ |
468 |
|
|
FX_TRACE_EVENT_UPDATE(trace_event, trace_timestamp, FX_TRACE_FILE_ALLOCATE, 0, 0, 0, file_ptr -> fx_file_current_file_size); |
469 |
|
|
|
470 |
|
|
/* Write the directory entry to the media. */ |
471 |
|
13 |
status = _fx_directory_entry_write(media_ptr, &(file_ptr -> fx_file_dir_entry)); |
472 |
|
|
|
473 |
|
|
/* Check for a good status. */ |
474 |
✓✓ |
13 |
if (status != FX_SUCCESS) |
475 |
|
|
{ |
476 |
|
|
|
477 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
478 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
479 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
480 |
|
|
|
481 |
|
|
/* Release media protection. */ |
482 |
|
1 |
FX_UNPROTECT |
483 |
|
|
|
484 |
|
|
/* Return the error status. */ |
485 |
|
1 |
return(status); |
486 |
|
|
} |
487 |
|
|
} |
488 |
|
|
else |
489 |
|
|
{ |
490 |
|
|
|
491 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
492 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
493 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
494 |
|
|
|
495 |
|
|
/* Release media protection. */ |
496 |
|
1 |
FX_UNPROTECT |
497 |
|
|
|
498 |
|
|
/* Not enough contiguous space on the media. Return error status. */ |
499 |
|
1 |
return(FX_NO_MORE_SPACE); |
500 |
|
|
} |
501 |
|
|
|
502 |
|
|
#ifdef FX_FAULT_TOLERANT |
503 |
|
|
|
504 |
|
|
/* Flush the cached individual FAT entries */ |
505 |
|
|
_fx_utility_FAT_flush(media_ptr); |
506 |
|
|
#endif |
507 |
|
|
|
508 |
|
|
/* Flush the internal logical sector cache. */ |
509 |
|
12 |
status = _fx_utility_logical_sector_flush(media_ptr, ((ULONG64) 1), (ULONG64)(media_ptr -> fx_media_sectors_per_FAT), FX_FALSE); |
510 |
|
|
|
511 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
512 |
|
|
/* Check for a bad status. */ |
513 |
|
|
if (status != FX_SUCCESS) |
514 |
|
|
{ |
515 |
|
|
|
516 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
517 |
|
|
|
518 |
|
|
/* Release media protection. */ |
519 |
|
|
FX_UNPROTECT |
520 |
|
|
|
521 |
|
|
/* Return the bad status. */ |
522 |
|
|
return(status); |
523 |
|
|
} |
524 |
|
|
|
525 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
526 |
|
|
{ |
527 |
|
|
|
528 |
|
|
/* Copy the new file size into the directory entry. */ |
529 |
|
|
file_ptr -> fx_file_dir_entry.fx_dir_entry_file_size = file_ptr -> fx_file_current_file_size; |
530 |
|
|
} |
531 |
|
|
|
532 |
|
|
/* End transaction. */ |
533 |
|
|
status = _fx_fault_tolerant_transaction_end(media_ptr); |
534 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
535 |
|
|
|
536 |
|
|
/* Release media protection. */ |
537 |
|
12 |
FX_UNPROTECT |
538 |
|
|
|
539 |
|
|
/* Return status to the caller. */ |
540 |
|
12 |
return(status); |
541 |
|
|
} |
542 |
|
|
|