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# HG changeset patch
# User Keir Fraser <keir.fraser@citrix.com>
# Date 1216141171 -3600
# Node ID 5f529c74a71250cdffd7cd97cb21f14691c00f69
# Parent b38bceff087af4573dfaf5bb6dad7ac1cfa36148
fs-backend: Fix freelist implementation

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>
---
tools/fs-back/fs-backend.c | 4 ++--
tools/fs-back/fs-backend.h | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)

diff -r b38bceff087a -r 5f529c74a712 tools/fs-back/fs-backend.c
--- a/tools/fs-back/fs-backend.c Tue Jul 15 17:58:39 2008 +0100
+++ b/tools/fs-back/fs-backend.c Tue Jul 15 17:59:31 2008 +0100
@@ -110,9 +110,9 @@ void allocate_request_array(struct mount
unsigned short *freelist;

requests = malloc(sizeof(struct fs_request) *nr_entries);
- freelist = malloc(sizeof(unsigned short) * nr_entries);
+ freelist = malloc(sizeof(unsigned short) * (nr_entries + 1));
memset(requests, 0, sizeof(struct fs_request) * nr_entries);
- memset(freelist, 0, sizeof(unsigned short) * nr_entries);
+ memset(freelist, 0, sizeof(unsigned short) * (nr_entries + 1));
for(i=0; i< nr_entries; i++)
{
requests[i].active = 0;
diff -r b38bceff087a -r 5f529c74a712 tools/fs-back/fs-backend.h
--- a/tools/fs-back/fs-backend.h Tue Jul 15 17:58:39 2008 +0100
+++ b/tools/fs-back/fs-backend.h Tue Jul 15 17:59:31 2008 +0100
@@ -72,14 +72,14 @@ extern struct fs_op *fsops[];

static inline void add_id_to_freelist(unsigned int id,unsigned short* freelist)
{
- freelist[id] = freelist[0];
+ freelist[id + 1] = freelist[0];
freelist[0] = id;
}

static inline unsigned short get_id_from_freelist(unsigned short* freelist)
{
unsigned int id = freelist[0];
- freelist[0] = freelist[id];
+ freelist[0] = freelist[id + 1];
return id;
}


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