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authorAlex Elder <elder@inktank.com>2012-07-13 20:35:11 -0500
committerSage Weil <sage@inktank.com>2012-07-30 18:15:47 -0700
commitaa711ee3402ad10ffd5b70ce0417fadc9a95cccf (patch)
tree2400f84b9bc87fbd989844c4e2462809f69e9a96 /fs/ceph
parentbd919d45aa61c19d9ed82548d6deb06bcae31153 (diff)
ceph: define snap counts as u32 everywhere
There are two structures in which a count of snapshots are maintained: struct ceph_snap_context { ... u32 num_snaps; ... } and struct ceph_snap_realm { ... u32 num_prior_parent_snaps; /* had prior to parent_since */ ... u32 num_snaps; ... } These fields never take on negative values (e.g., to hold special meaning), and so are really inherently unsigned. Furthermore they take their value from over-the-wire or on-disk formatted 32-bit values. So change their definition to have type u32, and change some spots elsewhere in the code to account for this change. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/snap.c18
-rw-r--r--fs/ceph/super.h4
2 files changed, 12 insertions, 10 deletions
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c
index e5206fc7656..cbb2f54a301 100644
--- a/fs/ceph/snap.c
+++ b/fs/ceph/snap.c
@@ -296,8 +296,7 @@ static int build_snap_context(struct ceph_snap_realm *realm)
struct ceph_snap_realm *parent = realm->parent;
struct ceph_snap_context *snapc;
int err = 0;
- int i;
- int num = realm->num_prior_parent_snaps + realm->num_snaps;
+ u32 num = realm->num_prior_parent_snaps + realm->num_snaps;
/*
* build parent context, if it hasn't been built.
@@ -321,11 +320,11 @@ static int build_snap_context(struct ceph_snap_realm *realm)
realm->cached_context->seq == realm->seq &&
(!parent ||
realm->cached_context->seq >= parent->cached_context->seq)) {
- dout("build_snap_context %llx %p: %p seq %lld (%d snaps)"
+ dout("build_snap_context %llx %p: %p seq %lld (%u snaps)"
" (unchanged)\n",
realm->ino, realm, realm->cached_context,
realm->cached_context->seq,
- realm->cached_context->num_snaps);
+ (unsigned int) realm->cached_context->num_snaps);
return 0;
}
@@ -342,6 +341,8 @@ static int build_snap_context(struct ceph_snap_realm *realm)
num = 0;
snapc->seq = realm->seq;
if (parent) {
+ u32 i;
+
/* include any of parent's snaps occurring _after_ my
parent became my parent */
for (i = 0; i < parent->cached_context->num_snaps; i++)
@@ -361,8 +362,9 @@ static int build_snap_context(struct ceph_snap_realm *realm)
sort(snapc->snaps, num, sizeof(u64), cmpu64_rev, NULL);
snapc->num_snaps = num;
- dout("build_snap_context %llx %p: %p seq %lld (%d snaps)\n",
- realm->ino, realm, snapc, snapc->seq, snapc->num_snaps);
+ dout("build_snap_context %llx %p: %p seq %lld (%u snaps)\n",
+ realm->ino, realm, snapc, snapc->seq,
+ (unsigned int) snapc->num_snaps);
if (realm->cached_context)
ceph_put_snap_context(realm->cached_context);
@@ -402,9 +404,9 @@ static void rebuild_snap_realms(struct ceph_snap_realm *realm)
* helper to allocate and decode an array of snapids. free prior
* instance, if any.
*/
-static int dup_array(u64 **dst, __le64 *src, int num)
+static int dup_array(u64 **dst, __le64 *src, u32 num)
{
- int i;
+ u32 i;
kfree(*dst);
if (num) {
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index fc35036d258..3ea48b7b98b 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -612,9 +612,9 @@ struct ceph_snap_realm {
u64 parent_since; /* snapid when our current parent became so */
u64 *prior_parent_snaps; /* snaps inherited from any parents we */
- int num_prior_parent_snaps; /* had prior to parent_since */
+ u32 num_prior_parent_snaps; /* had prior to parent_since */
u64 *snaps; /* snaps specific to this realm */
- int num_snaps;
+ u32 num_snaps;
struct ceph_snap_realm *parent;
struct list_head children; /* list of child realms */