From: Hugh Dickins Date: Thu, 7 Dec 2006 04:39:19 +0000 (-0800) Subject: [PATCH] ext4 balloc: fix off-by-one against grp_goal X-Git-Tag: v2.6.20-rc1~145^2^2~89 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e7dc95db2695dc92b223cdc49227ac57e63406d2;p=linux-2.6 [PATCH] ext4 balloc: fix off-by-one against grp_goal grp_goal 0 is a genuine goal (unlike -1), so ext4_try_to_allocate_with_rsv should treat it as such. Signed-off-by: Mingming Cao Signed-off-by: Hugh Dickins Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index af3acf3c37..2bcca5261e 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -1288,7 +1288,7 @@ ext4_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle, } /* * grp_goal is a group relative block number (if there is a goal) - * 0 < grp_goal < EXT4_BLOCKS_PER_GROUP(sb) + * 0 <= grp_goal < EXT4_BLOCKS_PER_GROUP(sb) * first block is a filesystem wide block number * first block is the block number of the first block in this group */ @@ -1324,7 +1324,7 @@ ext4_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle, if (!goal_in_my_reservation(&my_rsv->rsv_window, grp_goal, group, sb)) grp_goal = -1; - } else if (grp_goal > 0) { + } else if (grp_goal >= 0) { int curr = my_rsv->rsv_end - (grp_goal + group_first_block) + 1;