libceph: decode into cpu-native ceph_pg type

Always decode data into our cpu-native ceph_pg type that has the correct
field widths.  Limit any remaining uses of ceph_pg_v1 to dealing with the
legacy protocol.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>

1 files changed, 43 insertions, 35 deletions

diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index 8c89ac25081a..81118db5bd11 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -350,14 +350,15 @@ bad:
  * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
  * to a set of osds)
  */
-static int pgid_cmp(struct ceph_pg_v1 l, struct ceph_pg_v1 r)
+static int pgid_cmp(struct ceph_pg l, struct ceph_pg r)
 {
-        u64 a = *(u64 *)&l;
-        u64 b = *(u64 *)&r;
-
-        if (a < b)
+        if (l.pool < r.pool)
+                return -1;
+        if (l.pool > r.pool)
+                return 1;
+        if (l.seed < r.seed)
                 return -1;
-        if (a > b)
+        if (l.seed > r.seed)
                 return 1;
         return 0;
 }
@@ -389,7 +390,7 @@ static int __insert_pg_mapping(struct ceph_pg_mapping *new,
 }
 
 static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,
-                                                   struct ceph_pg_v1 pgid)
+                                                   struct ceph_pg pgid)
 {
         struct rb_node *n = root->rb_node;
         struct ceph_pg_mapping *pg;
@@ -403,25 +404,26 @@ static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,
                 } else if (c > 0) {
                         n = n->rb_right;
                 } else {
-                        dout("__lookup_pg_mapping %llx got %p\n",
-                             *(u64 *)&pgid, pg);
+                        dout("__lookup_pg_mapping %lld.%x got %p\n",
+                             pgid.pool, pgid.seed, pg);
                         return pg;
                 }
         }
         return NULL;
 }
 
-static int __remove_pg_mapping(struct rb_root *root, struct ceph_pg_v1 pgid)
+static int __remove_pg_mapping(struct rb_root *root, struct ceph_pg pgid)
 {
         struct ceph_pg_mapping *pg = __lookup_pg_mapping(root, pgid);
 
         if (pg) {
-                dout("__remove_pg_mapping %llx %p\n", *(u64 *)&pgid, pg);
+                dout("__remove_pg_mapping %lld.%x %p\n", pgid.pool, pgid.seed,
+                     pg);
                 rb_erase(&pg->node, root);
                 kfree(pg);
                 return 0;
         }
-        dout("__remove_pg_mapping %llx dne\n", *(u64 *)&pgid);
+        dout("__remove_pg_mapping %lld.%x dne\n", pgid.pool, pgid.seed);
         return -ENOENT;
 }
 
@@ -721,11 +723,14 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
         ceph_decode_32_safe(p, end, len, bad);
         for (i = 0; i < len; i++) {
                 int n, j;
-                struct ceph_pg_v1 pgid;
+                struct ceph_pg pgid;
+                struct ceph_pg_v1 pgid_v1;
                 struct ceph_pg_mapping *pg;
 
                 ceph_decode_need(p, end, sizeof(u32) + sizeof(u64), bad);
-                ceph_decode_copy(p, &pgid, sizeof(pgid));
+                ceph_decode_copy(p, &pgid_v1, sizeof(pgid_v1));
+                pgid.pool = le32_to_cpu(pgid_v1.pool);
+                pgid.seed = le16_to_cpu(pgid_v1.ps);
                 n = ceph_decode_32(p);
                 err = -EINVAL;
                 if (n > (UINT_MAX - sizeof(*pg)) / sizeof(u32))
@@ -743,7 +748,8 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
                 err = __insert_pg_mapping(pg, &map->pg_temp);
                 if (err)
                         goto bad;
-                dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid, len);
+                dout(" added pg_temp %lld.%x len %d\n", pgid.pool, pgid.seed,
+                     len);
         }
 
         /* crush */
@@ -944,10 +950,13 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
         while (len--) {
                 struct ceph_pg_mapping *pg;
                 int j;
-                struct ceph_pg_v1 pgid;
+                struct ceph_pg_v1 pgid_v1;
+                struct ceph_pg pgid;
                 u32 pglen;
                 ceph_decode_need(p, end, sizeof(u64) + sizeof(u32), bad);
-                ceph_decode_copy(p, &pgid, sizeof(pgid));
+                ceph_decode_copy(p, &pgid_v1, sizeof(pgid_v1));
+                pgid.pool = le32_to_cpu(pgid_v1.pool);
+                pgid.seed = le16_to_cpu(pgid_v1.ps);
                 pglen = ceph_decode_32(p);
 
                 if (pglen) {
@@ -973,8 +982,8 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
                                 kfree(pg);
                                 goto bad;
                         }
-                        dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid,
-                             pglen);
+                        dout(" added pg_temp %lld.%x len %d\n", pgid.pool,
+                             pgid.seed, pglen);
                 } else {
                         /* remove */
                         __remove_pg_mapping(&map->pg_temp, pgid);
@@ -1079,26 +1088,25 @@ int ceph_calc_object_layout(struct ceph_object_layout *ol,
                             struct ceph_osdmap *osdmap)
 {
         unsigned int num, num_mask;
-        struct ceph_pg_v1 pgid;
-        int poolid = le32_to_cpu(fl->fl_pg_pool);
+        struct ceph_pg pgid;
         struct ceph_pg_pool_info *pool;
-        unsigned int ps;
 
         BUG_ON(!osdmap);
 
-        pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
+        pgid.pool = le32_to_cpu(fl->fl_pg_pool);
+        pool = __lookup_pg_pool(&osdmap->pg_pools, pgid.pool);
         if (!pool)
                 return -EIO;
-        ps = ceph_str_hash(pool->v.object_hash, oid, strlen(oid));
+        pgid.seed = ceph_str_hash(pool->v.object_hash, oid, strlen(oid));
         num = le32_to_cpu(pool->v.pg_num);
         num_mask = pool->pg_num_mask;
 
-        pgid.ps = cpu_to_le16(ps);
-        pgid.preferred = cpu_to_le16(-1);
-        pgid.pool = fl->fl_pg_pool;
-        dout("calc_object_layout '%s' pgid %d.%x\n", oid, poolid, ps);
+        dout("calc_object_layout '%s' pgid %lld.%x\n", oid, pgid.pool,
+             pgid.seed);
 
-        ol->ol_pgid = pgid;
+        ol->ol_pgid.ps = cpu_to_le16(pgid.seed);
+        ol->ol_pgid.pool = fl->fl_pg_pool;
+        ol->ol_pgid.preferred = cpu_to_le16(-1);
         ol->ol_stripe_unit = fl->fl_object_stripe_unit;
         return 0;
 }
@@ -1108,7 +1116,7 @@ EXPORT_SYMBOL(ceph_calc_object_layout);
  * Calculate raw osd vector for the given pgid.  Return pointer to osd
  * array, or NULL on failure.
  */
-static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg_v1 pgid,
+static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
                         int *osds, int *num)
 {
         struct ceph_pg_mapping *pg;
@@ -1116,8 +1124,8 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg_v1 pgid,
         int ruleno;
         unsigned int poolid, ps, pps, t, r;
 
-        poolid = le32_to_cpu(pgid.pool);
-        ps = le16_to_cpu(pgid.ps);
+        poolid = pgid.pool;
+        ps = pgid.seed;
 
         pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
         if (!pool)
@@ -1126,7 +1134,7 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg_v1 pgid,
         /* pg_temp? */
         t = ceph_stable_mod(ps, le32_to_cpu(pool->v.pg_num),
                             pool->pgp_num_mask);
-        pgid.ps = cpu_to_le16(t);
+        pgid.seed = t;
         pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
         if (pg) {
                 *num = pg->len;
@@ -1163,7 +1171,7 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg_v1 pgid,
 /*
  * Return acting set for given pgid.
  */
-int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg_v1 pgid,
+int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
                         int *acting)
 {
         int rawosds[CEPH_PG_MAX_SIZE], *osds;
@@ -1184,7 +1192,7 @@ int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg_v1 pgid,
 /*
  * Return primary osd for given pgid, or -1 if none.
  */
-int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg_v1 pgid)
+int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid)
 {
         int rawosds[CEPH_PG_MAX_SIZE], *osds;
         int i, num = CEPH_PG_MAX_SIZE;