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authorIlya Dryomov <ilya.dryomov@inktank.com>2014-03-21 19:05:29 +0200
committerSage Weil <sage@inktank.com>2014-04-04 21:07:55 -0700
commitec7af97258396161e6effba7e788c3fc3cb55263 (patch)
treefc00b89d05b40fadd9dba80fe8c31fc316a605eb /net/ceph/osdmap.c
parent10db634e2083a202a26123d6d4c9ede98d6a1199 (diff)
downloadlinux-ec7af97258396161e6effba7e788c3fc3cb55263.tar.bz2
libceph: introduce get_osdmap_client_data_v()
Full and incremental osdmaps are structured identically and have identical headers. Add a helper to decode both "old" (16-bit version, v6) and "new" (8-bit struct_v+struct_compat+struct_len, v7) osdmap enconding headers and switch to it. Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com> Reviewed-by: Alex Elder <elder@linaro.org>
Diffstat (limited to 'net/ceph/osdmap.c')
-rw-r--r--net/ceph/osdmap.c81
1 files changed, 65 insertions, 16 deletions
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index 6497322d2e3c..be2a65fbd902 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -683,6 +683,63 @@ static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
return 0;
}
+#define OSDMAP_WRAPPER_COMPAT_VER 7
+#define OSDMAP_CLIENT_DATA_COMPAT_VER 1
+
+/*
+ * Return 0 or error. On success, *v is set to 0 for old (v6) osdmaps,
+ * to struct_v of the client_data section for new (v7 and above)
+ * osdmaps.
+ */
+static int get_osdmap_client_data_v(void **p, void *end,
+ const char *prefix, u8 *v)
+{
+ u8 struct_v;
+
+ ceph_decode_8_safe(p, end, struct_v, e_inval);
+ if (struct_v >= 7) {
+ u8 struct_compat;
+
+ ceph_decode_8_safe(p, end, struct_compat, e_inval);
+ if (struct_compat > OSDMAP_WRAPPER_COMPAT_VER) {
+ pr_warning("got v %d cv %d > %d of %s ceph_osdmap\n",
+ struct_v, struct_compat,
+ OSDMAP_WRAPPER_COMPAT_VER, prefix);
+ return -EINVAL;
+ }
+ *p += 4; /* ignore wrapper struct_len */
+
+ ceph_decode_8_safe(p, end, struct_v, e_inval);
+ ceph_decode_8_safe(p, end, struct_compat, e_inval);
+ if (struct_compat > OSDMAP_CLIENT_DATA_COMPAT_VER) {
+ pr_warning("got v %d cv %d > %d of %s ceph_osdmap client data\n",
+ struct_v, struct_compat,
+ OSDMAP_CLIENT_DATA_COMPAT_VER, prefix);
+ return -EINVAL;
+ }
+ *p += 4; /* ignore client data struct_len */
+ } else {
+ u16 version;
+
+ *p -= 1;
+ ceph_decode_16_safe(p, end, version, e_inval);
+ if (version < 6) {
+ pr_warning("got v %d < 6 of %s ceph_osdmap\n", version,
+ prefix);
+ return -EINVAL;
+ }
+
+ /* old osdmap enconding */
+ struct_v = 0;
+ }
+
+ *v = struct_v;
+ return 0;
+
+e_inval:
+ return -EINVAL;
+}
+
static int __decode_pools(void **p, void *end, struct ceph_osdmap *map,
bool incremental)
{
@@ -798,7 +855,7 @@ static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
*/
static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
{
- u16 version;
+ u8 struct_v;
u32 epoch = 0;
void *start = *p;
u32 max;
@@ -807,15 +864,9 @@ static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
- ceph_decode_16_safe(p, end, version, e_inval);
- if (version > 6) {
- pr_warning("got unknown v %d > 6 of osdmap\n", version);
- goto e_inval;
- }
- if (version < 6) {
- pr_warning("got old v %d < 6 of osdmap\n", version);
- goto e_inval;
- }
+ err = get_osdmap_client_data_v(p, end, "full", &struct_v);
+ if (err)
+ goto bad;
/* fsid, epoch, created, modified */
ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) +
@@ -943,15 +994,13 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
__s32 new_flags, max;
void *start = *p;
int err;
- u16 version;
+ u8 struct_v;
dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
- ceph_decode_16_safe(p, end, version, e_inval);
- if (version != 6) {
- pr_warning("got unknown v %d != 6 of inc osdmap\n", version);
- goto e_inval;
- }
+ err = get_osdmap_client_data_v(p, end, "inc", &struct_v);
+ if (err)
+ goto bad;
/* fsid, epoch, modified, new_pool_max, new_flags */
ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) +