Cross Reference: /src/sys/fs/msdosfs/msdosfs

Lines Matching refs:cluster
89 int fc_lfcempty;		/* # of time last file cluster cache entry
95 				 * cluster mapped entry was. */
164  * Map the logical cluster number of a file into a physical disk sector
168  * findcn - file relative cluster whose filesystem relative cluster number
172  * cnp	  - address of where to place the file system relative cluster number.
176  * This function has one side effect.  If the requested file relative cluster
183     u_long findcn,	/* file relative cluster to get */
185     u_long *cnp,	/* returned cluster number */
210 	DPRINTF(("%s(start cluster=%lu)\n", __func__, cn));
214 	 * clusters.  If the cluster number is beyond the end of the root
246 	 * All other files do I/O in cluster sized blocks
279 		 * Also stop when cluster is not in the filesystem
340 	/* update last file cluster entry in the FAT cache */
347  * Find the closest entry in the FAT cache to the cluster we are looking
373  * relative cluster frcn and beyond.
415 			 * The cluster indicated in FSInfo isn't free
494  * cluster number into the appropriate bytes in the FAT.
504  *	cluster n  	   cluster n+1
526 msdosfs_clusterfree(struct msdosfsmount *pmp, u_long cluster, u_long *oldcnp)
531 	usemap_free(pmp, cluster);
532 	error = msdosfs_fatentry(FAT_GET_AND_SET, pmp, cluster, &oldcn,
535 		usemap_alloc(pmp, cluster);
539 	 * If the cluster was successfully marked free, then update
541 	 * bit in the "in use" cluster bit map.
549  * Get or Set or 'Get and Set' the cluster'th entry in the FAT.
554  * cn		- which cluster is of interest
556  *		  cluster'th entry if this is a get function
557  * newcontents	- the new value to be written into the cluster'th element of
560  * This function can also be used to free a cluster by setting the FAT entry
561  * for a cluster to 0.
564  * fatentry() marks a cluster as free it does not update the inusemap in
590 	 * If they asked us to return a cluster number but didn't tell us
601 	 * Be sure the requested cluster is in the filesystem.
660  * Update a contiguous cluster chain
663  * start    - first cluster of chain
665  * fillwith - what to write into FAT entry of last cluster
730  * Check the length of a free cluster chain starting at start.
771  * start      - start of cluster chain.
774  *		last allocated cluster.
775  * retcluster - put the first allocated cluster's number here.
789 	DPRINTF(("%s(): allocated cluster chain at %lu (%lu clusters)\n",
802  * start      - preferred start of cluster chain.
805  *		last allocated cluster.
806  * retcluster - put the first allocated cluster's number here.
835 	 * Start at a (pseudo) random place to maximize cluster runs
890  *		  containing the cluster chain to be freed.
891  * startcluster - number of the 1st cluster in the chain of clusters to be
895 msdosfs_freeclusterchain(struct msdosfsmount *pmp, u_long cluster)
903 	while (cluster >= CLUST_FIRST && cluster <= pmp->pm_maxcluster) {
904 		byteoffset = FATOFS(pmp, cluster);
916 		usemap_free(pmp, cluster);
921 			if (cluster & 1) {
922 				cluster = readcn >> 4;
926 				cluster = readcn;
933 			cluster = getushort((char *)bp->b_data + bo);
937 			cluster = getulong((char *)bp->b_data + bo);
939 				 (MSDOSFSFREE & FAT32_MASK) | (cluster & ~FAT32_MASK));
942 		cluster &= pmp->pm_fatmask;
950  * Read in FAT blocks looking for free clusters. For every free cluster
1005  * Allocate a new cluster and chain it onto the end of the file.
1011  * ncp	 - where to put cluster number of the first newly allocated cluster
1012  *	   If this pointer is 0, do not return the cluster number.
1039 	 * If the "file's last cluster" cache entry is empty, and the file
1057 		 * Allocate a new cluster chain and cat onto the end of the
1077 		 * Give them the filesystem relative cluster number if they want
1100 		 * Update the "last cluster of the file" entry in the
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