diff options
Diffstat (limited to 'fs/ubifs/misc.h')
-rw-r--r-- | fs/ubifs/misc.h | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/fs/ubifs/misc.h b/fs/ubifs/misc.h index 87ced4c74a61..4c12a9215d7f 100644 --- a/fs/ubifs/misc.h +++ b/fs/ubifs/misc.h | |||
@@ -284,38 +284,6 @@ static inline void *ubifs_idx_key(const struct ubifs_info *c, | |||
284 | } | 284 | } |
285 | 285 | ||
286 | /** | 286 | /** |
287 | * ubifs_reported_space - calculate reported free space. | ||
288 | * @c: the UBIFS file-system description object | ||
289 | * @free: amount of free space | ||
290 | * | ||
291 | * This function calculates amount of free space which will be reported to | ||
292 | * user-space. User-space application tend to expect that if the file-system | ||
293 | * (e.g., via the 'statfs()' call) reports that it has N bytes available, they | ||
294 | * are able to write a file of size N. UBIFS attaches node headers to each data | ||
295 | * node and it has to write indexind nodes as well. This introduces additional | ||
296 | * overhead, and UBIFS it has to report sligtly less free space to meet the | ||
297 | * above expectetion. | ||
298 | * | ||
299 | * This function assumes free space is made up of uncompressed data nodes and | ||
300 | * full index nodes (one per data node, doubled because we always allow enough | ||
301 | * space to write the index twice). | ||
302 | * | ||
303 | * Note, the calculation is pessimistic, which means that most of the time | ||
304 | * UBIFS reports less space than it actually has. | ||
305 | */ | ||
306 | static inline long long ubifs_reported_space(const struct ubifs_info *c, | ||
307 | uint64_t free) | ||
308 | { | ||
309 | int divisor, factor; | ||
310 | |||
311 | divisor = UBIFS_MAX_DATA_NODE_SZ + (c->max_idx_node_sz * 3); | ||
312 | factor = UBIFS_MAX_DATA_NODE_SZ - UBIFS_DATA_NODE_SZ; | ||
313 | do_div(free, divisor); | ||
314 | |||
315 | return free * factor; | ||
316 | } | ||
317 | |||
318 | /** | ||
319 | * ubifs_current_time - round current time to time granularity. | 287 | * ubifs_current_time - round current time to time granularity. |
320 | * @inode: inode | 288 | * @inode: inode |
321 | */ | 289 | */ |