fs/ocfs2/localalloc.c

20 #include "alloc.h"
35 static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc);
38 					     struct ocfs2_dinode *alloc,
42 static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc);
46 				    struct ocfs2_dinode *alloc,
64  * the local alloc.
66  * Generally, we'd like to pick as large a local alloc as
72  * Some things work against us when trying to choose a large local alloc:
87  * alloc maximums at various cluster sizes (4k blocksize)
142 		 * local alloc size down to 256 however, would give us
237  * Tell us whether a given allocation should use the local alloc
240  * This function does semi-dirty reads of local alloc size and state!
256 	 * allocations go through the local alloc, so allow an
272 	struct ocfs2_dinode *alloc = NULL;
282 		mlog(ML_NOTICE, "Requested local alloc window %d is larger "
290 	/* read the alloc off disk */
306 	alloc = (struct ocfs2_dinode *) alloc_bh->b_data;
307 	la = OCFS2_LOCAL_ALLOC(alloc);
309 	if (!(le32_to_cpu(alloc->i_flags) &
311 		mlog(ML_ERROR, "Invalid local alloc inode, %llu\n",
319 		mlog(ML_ERROR, "Local alloc size is invalid (la_size = %u)\n",
326 	num_used = ocfs2_local_alloc_count_bits(alloc);
328 	/* hopefully the local alloc has always been recovered before
331 	    || alloc->id1.bitmap1.i_used
332 	    || alloc->id1.bitmap1.i_total
335 		     " unrecovered local alloc, please run fsck.ocfs2!\n"
337 		     num_used, le32_to_cpu(alloc->id1.bitmap1.i_used),
338 		     le32_to_cpu(alloc->id1.bitmap1.i_total),
339 		     le32_to_cpu(OCFS2_LOCAL_ALLOC(alloc)->la_bm_off));
376 	struct ocfs2_dinode *alloc = NULL;
425 	alloc = (struct ocfs2_dinode *) bh->b_data;
427 	alloc_copy = kmemdup(alloc, bh->b_size, GFP_NOFS);
440 	ocfs2_clear_local_alloc(alloc);
473  * alloc before giving up the recovered nodes journal. To solve this,
474  * we kmalloc a copy of the local alloc before it's change for the
484 	struct ocfs2_dinode *alloc;
515 	alloc = (struct ocfs2_dinode *) alloc_bh->b_data;
516 	ocfs2_clear_local_alloc(alloc);
518 	ocfs2_compute_meta_ecc(osb->sb, alloc_bh->b_data, &alloc->i_check);
543  * a clean local alloc on disk and dropped the node out of the
548 					struct ocfs2_dinode *alloc)
583 	status = ocfs2_sync_local_to_main(osb, handle, alloc,
610  * local alloc. You lose them when you drop i_rwsem.
620 	struct ocfs2_dinode *alloc;
651 	alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
654 	if (le32_to_cpu(alloc->id1.bitmap1.i_used) !=
655 	    ocfs2_local_alloc_count_bits(alloc)) {
656 		status = ocfs2_error(osb->sb, "local alloc inode %llu says it has %u used bits, but a count shows %u\n",
657 				(unsigned long long)le64_to_cpu(alloc->i_blkno),
658 				le32_to_cpu(alloc->id1.bitmap1.i_used),
659 				ocfs2_local_alloc_count_bits(alloc));
664 	free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) -
665 		le32_to_cpu(alloc->id1.bitmap1.i_used);
679 		 * disabled the local alloc entirely. Re-check
686 		free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) -
687 			le32_to_cpu(alloc->id1.bitmap1.i_used);
724 	struct ocfs2_dinode *alloc;
730 	alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
731 	la = OCFS2_LOCAL_ALLOC(alloc);
733 	start = ocfs2_local_alloc_find_clear_bits(osb, alloc, &bits_wanted,
761 	le32_add_cpu(&alloc->id1.bitmap1.i_used, *num_bits);
780 	struct ocfs2_dinode *alloc;
786 	alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
787 	la = OCFS2_LOCAL_ALLOC(alloc);
805 	le32_add_cpu(&alloc->id1.bitmap1.i_used, -num_bits);
812 static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc)
815 	struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
824 				     struct ocfs2_dinode *alloc,
834 	if (!alloc->id1.bitmap1.i_total) {
863 	bitmap = OCFS2_LOCAL_ALLOC(alloc)->la_bitmap;
866 	left = le32_to_cpu(alloc->id1.bitmap1.i_total);
899 		le32_to_cpu(alloc->id1.bitmap1.i_total),
905 static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc)
907 	struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
910 	alloc->id1.bitmap1.i_total = 0;
911 	alloc->id1.bitmap1.i_used = 0;
937  * sync the local alloc to main bitmap.
944 				    struct ocfs2_dinode *alloc,
953 	struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
956 	     le32_to_cpu(alloc->id1.bitmap1.i_total),
957 	     le32_to_cpu(alloc->id1.bitmap1.i_used));
959 	if (!alloc->id1.bitmap1.i_total) {
963 	if (le32_to_cpu(alloc->id1.bitmap1.i_used) ==
964 	    le32_to_cpu(alloc->id1.bitmap1.i_total)) {
972 	left = le32_to_cpu(alloc->id1.bitmap1.i_total);
1026  * Given an event, calculate the size of our next local alloc window.
1028  * This should always be called under i_rwsem of the local alloc inode
1029  * so that local alloc disabling doesn't race with processes trying to
1032  * Returns the state which the local alloc was left in. This value can
1055 		 * by local alloc until we have to disable it.
1061 			 * the number of local alloc bits used down
1077 	 * Don't increase the size of the local alloc window until we
1148 	struct ocfs2_dinode *alloc = NULL;
1151 	alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
1152 	la = OCFS2_LOCAL_ALLOC(alloc);
1155 		le32_to_cpu(alloc->id1.bitmap1.i_total),
1206 	alloc->id1.bitmap1.i_total = cpu_to_le32(cluster_count);
1211 	alloc->id1.bitmap1.i_used = 0;
1212 	memset(OCFS2_LOCAL_ALLOC(alloc)->la_bitmap, 0,
1216 			     OCFS2_LOCAL_ALLOC(alloc)->la_bitmap);
1219 		le32_to_cpu(OCFS2_LOCAL_ALLOC(alloc)->la_bm_off),
1220 		le32_to_cpu(alloc->id1.bitmap1.i_total));
1228 /* Note that we do *NOT* lock the local alloc inode here as
1237 	struct ocfs2_dinode *alloc;
1262 	alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
1264 	/* We want to clear the local alloc before doing anything
1266 	 * local alloc shutdown won't try to double free main bitmap
1269 	alloc_copy = kmemdup(alloc, osb->local_alloc_bh->b_size, GFP_NOFS);
1285 	ocfs2_clear_local_alloc(alloc);