fs/msdosfs/msdosfs_fat.c

60 #include <fs/msdosfs/fat.h>
185 	 * Rummage around in the fat cache, maybe we can avoid tromping
186 	 * thru every fat entry for the file. And, keep track of how far
253 	/* update last file cluster entry in the fat cache */
259  * Find the closest entry in the fat cache to the cluster we are looking
289  * Purge the fat cache in denode dep of all entries relating to file
310  * Update the fat.
311  * If mirroring the fat, update all copies, with the first copy as last.
312  * Else update only the current fat (ignoring the others).
315  * bp	 - addr of modified fat block
316  * fatbn - block number relative to begin of filesystem of the modified fat block.
333 		 * Now copy the block(s) of the modified fat to the other copies of
334 		 * the fat and write them out.  This is faster than reading in the
336 		 * the fat for quite a while. Preventing others from accessing it.
337 		 * To prevent us from going after the fat quite so much we use
367 	 * Write out the first (or current) fat last.
452  * Get or Set or 'Get and Set' the cluster'th entry in the fat.
454  * function	- whether to get or set a fat entry
456  *		  whose fat is to be manipulated.
461  *		  the fat if this is a set function.
463  * This function can also be used to free a cluster by setting the fat entry
466  * All copies of the fat are updated if this is a set function. NOTE: If
533 		/* map reserved fat entries to same values for all fats */
557 			 * high order bits of the fat entry.
580  * fillwith - what to write into fat entry of last cluster
700  * fillwith   - put this value into the fat entry for the
745  * fillwith   - put this value into the fat entry for the
899  * Read in fat blocks looking for free clusters. For every free cluster
914 	 * Mark all clusters in use, we mark the free ones in the fat scan
922 	 * through the fat counting the number of entries whose content is
965  * flags - see fat.h
1057 		 * Update the "last cluster of the file" entry in the denode's fat