[PATCH] 05/13 e2fsprogs-inode_prealloc - allow PAGE_SIZE persistent preallocation

Allow regular files to be preallocated on-disk up to the next multiple
of the system PAGE_SIZE without complaining about extra blocks.

Index: e2fsprogs/e2fsck/pass1.c
===================================================================
--- e2fsprogs.orig/e2fsck/pass1.c	2006-07-05 12:11:09.000000000 -0600
+++ e2fsprogs/e2fsck/pass1.c	2006-07-05 14:23:49.000000000 -0600
@@ -1486,9 +1486,14 @@ static void check_blocks(e2fsck_t ctx, s
 				bad_size = 2;
 		}
 	} else {
+		e2_blkcnt_t blkpg = getpagesize() / fs->blocksize;
+
 		size = EXT2_I_SIZE(inode);
 		if ((pb.last_block >= 0) &&
-		    (size < (__u64) pb.last_block * fs->blocksize))
+		    /* allow allocated blocks to end of PAGE_SIZE */
+		    (size < (__u64)pb.last_block * fs->blocksize) &&
+		    (pb.last_block / blkpg * blkpg != pb.last_block ||
+		     size < (__u64)(pb.last_block & ~(blkpg-1)) *fs->blocksize))
 			bad_size = 3;
 		else if (size > ext2_max_sizes[fs->super->s_log_block_size])
 			bad_size = 4;

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.


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