ceph: convert encode/decode macros to inlines
Sage Weil [Wed, 14 Oct 2009 16:59:09 +0000 (09:59 -0700)]
This avoids the fugly pass by reference and makes the code a bit easier
to read.

Signed-off-by: Sage Weil <sage@newdream.net>

fs/ceph/decode.h
fs/ceph/mds_client.c
fs/ceph/mdsmap.c
fs/ceph/mon_client.c
fs/ceph/osd_client.c
fs/ceph/osdmap.c

index fc2769d..91179fb 100644 (file)
@@ -3,12 +3,44 @@
 
 #include <asm/unaligned.h>
 
+#include "types.h"
+
 /*
  * in all cases,
  *   void **p     pointer to position pointer
  *   void *end    pointer to end of buffer (last byte + 1)
  */
 
+static inline u64 ceph_decode_64(void **p)
+{
+       u64 v = get_unaligned_le64(*p);
+       *p += sizeof(u64);
+       return v;
+}
+static inline u32 ceph_decode_32(void **p)
+{
+       u32 v = get_unaligned_le32(*p);
+       *p += sizeof(u32);
+       return v;
+}
+static inline u16 ceph_decode_16(void **p)
+{
+       u16 v = get_unaligned_le16(*p);
+       *p += sizeof(u16);
+       return v;
+}
+static inline u8 ceph_decode_8(void **p)
+{
+       u8 v = *(u8 *)*p;
+       (*p)++;
+       return v;
+}
+static inline void ceph_decode_copy(void **p, void *pv, size_t n)
+{
+       memcpy(pv, *p, n);
+       *p += n;
+}
+
 /*
  * bounds check input.
  */
                        goto bad;                       \
        } while (0)
 
-#define ceph_decode_64(p, v)                                   \
-       do {                                                    \
-               v = get_unaligned_le64(*(p));                   \
-               *(p) += sizeof(u64);                            \
-       } while (0)
-#define ceph_decode_32(p, v)                                   \
-       do {                                                    \
-               v = get_unaligned_le32(*(p));                   \
-               *(p) += sizeof(u32);                            \
-       } while (0)
-#define ceph_decode_16(p, v)                                   \
-       do {                                                    \
-               v = get_unaligned_le16(*(p));                   \
-               *(p) += sizeof(u16);                            \
-       } while (0)
-#define ceph_decode_8(p, v)                            \
-       do {                                            \
-               v = *(u8 *)*(p);                        \
-               (*p)++;                                 \
-       } while (0)
-
-#define ceph_decode_copy(p, pv, n)                     \
-       do {                                            \
-               memcpy(pv, *(p), n);                    \
-               *(p) += n;                              \
-       } while (0)
-
-/* bounds check too */
 #define ceph_decode_64_safe(p, end, v, bad)                    \
        do {                                                    \
                ceph_decode_need(p, end, sizeof(u64), bad);     \
-               ceph_decode_64(p, v);                           \
+               v = ceph_decode_64(p);                          \
        } while (0)
 #define ceph_decode_32_safe(p, end, v, bad)                    \
        do {                                                    \
                ceph_decode_need(p, end, sizeof(u32), bad);     \
-               ceph_decode_32(p, v);                           \
+               v = ceph_decode_32(p);                          \
        } while (0)
 #define ceph_decode_16_safe(p, end, v, bad)                    \
        do {                                                    \
                ceph_decode_need(p, end, sizeof(u16), bad);     \
-               ceph_decode_16(p, v);                           \
+               v = ceph_decode_16(p);                          \
        } while (0)
 
 #define ceph_decode_copy_safe(p, end, pv, n, bad)              \
 /*
  * struct ceph_timespec <-> struct timespec
  */
-#define ceph_decode_timespec(ts, tv)                                   \
-       do {                                                            \
-               (ts)->tv_sec = le32_to_cpu((tv)->tv_sec);               \
-               (ts)->tv_nsec = le32_to_cpu((tv)->tv_nsec);             \
-       } while (0)
-#define ceph_encode_timespec(tv, ts)                           \
-       do {                                                    \
-               (tv)->tv_sec = cpu_to_le32((ts)->tv_sec);       \
-               (tv)->tv_nsec = cpu_to_le32((ts)->tv_nsec);     \
-       } while (0)
-
+static inline void ceph_decode_timespec(struct timespec *ts,
+                                       struct ceph_timespec *tv)
+{
+       ts->tv_sec = le32_to_cpu(tv->tv_sec);
+       ts->tv_nsec = le32_to_cpu(tv->tv_nsec);
+}
+static inline void ceph_encode_timespec(struct ceph_timespec *tv,
+                                       struct timespec *ts)
+{
+       tv->tv_sec = cpu_to_le32(ts->tv_sec);
+       tv->tv_nsec = cpu_to_le32(ts->tv_nsec);
+}
 
 /*
  * encoders
  */
-#define ceph_encode_64(p, v)                                           \
-       do {                                                            \
-               put_unaligned_le64(v, (__le64 *)*(p));                  \
-               *(p) += sizeof(u64);                                    \
-       } while (0)
-#define ceph_encode_32(p, v)                                   \
-       do {                                                    \
-               put_unaligned_le32(v, (__le32 *)*(p));          \
-               *(p) += sizeof(u32);                            \
-       } while (0)
-#define ceph_encode_16(p, v)                                   \
-       do {                                                    \
-               put_unaligned_le16(v), (__le16 *)*(p));         \
-       *(p) += sizeof(u16);                                    \
-       } while (0)
-#define ceph_encode_8(p, v)                      \
-       do {                                      \
-               *(u8 *)*(p) = v;                  \
-               (*(p))++;                         \
-       } while (0)
+static inline void ceph_encode_64(void **p, u64 v)
+{
+       put_unaligned_le64(v, (__le64 *)*p);
+       *p += sizeof(u64);
+}
+static inline void ceph_encode_32(void **p, u32 v)
+{
+       put_unaligned_le32(v, (__le32 *)*p);
+       *p += sizeof(u32);
+}
+static inline void ceph_encode_16(void **p, u16 v)
+{
+       put_unaligned_le16(v, (__le16 *)*p);
+       *p += sizeof(u16);
+}
+static inline void ceph_encode_8(void **p, u8 v)
+{
+       *(u8 *)*p = v;
+       (*p)++;
+}
 
 /*
  * filepath, string encoders
index de8ba4a..2b19da3 100644 (file)
@@ -136,9 +136,9 @@ static int parse_reply_info_dir(void **p, void *end,
                goto bad;
 
        ceph_decode_need(p, end, sizeof(num) + 2, bad);
-       ceph_decode_32(p, num);
-       ceph_decode_8(p, info->dir_end);
-       ceph_decode_8(p, info->dir_complete);
+       num = ceph_decode_32(p);
+       info->dir_end = ceph_decode_8(p);
+       info->dir_complete = ceph_decode_8(p);
        if (num == 0)
                goto done;
 
@@ -160,7 +160,7 @@ static int parse_reply_info_dir(void **p, void *end,
        while (num) {
                /* dentry */
                ceph_decode_need(p, end, sizeof(u32)*2, bad);
-               ceph_decode_32(p, info->dir_dname_len[i]);
+               info->dir_dname_len[i] = ceph_decode_32(p);
                ceph_decode_need(p, end, info->dir_dname_len[i], bad);
                info->dir_dname[i] = *p;
                *p += info->dir_dname_len[i];
@@ -1791,10 +1791,10 @@ static void handle_forward(struct ceph_mds_client *mdsc, struct ceph_msg *msg)
        from_mds = le64_to_cpu(msg->hdr.src.name.num);
 
        ceph_decode_need(&p, end, sizeof(u64)+2*sizeof(u32), bad);
-       ceph_decode_64(&p, tid);
-       ceph_decode_32(&p, next_mds);
-       ceph_decode_32(&p, fwd_seq);
-       ceph_decode_8(&p, must_resend);
+       tid = ceph_decode_64(&p);
+       next_mds = ceph_decode_32(&p);
+       fwd_seq = ceph_decode_32(&p);
+       must_resend = ceph_decode_8(&p);
 
        WARN_ON(must_resend);  /* shouldn't happen. */
 
@@ -2783,8 +2783,8 @@ void ceph_mdsc_handle_map(struct ceph_mds_client *mdsc, struct ceph_msg *msg)
                pr_err("got mdsmap with wrong fsid\n");
                return;
        }
-       ceph_decode_32(&p, epoch);
-       ceph_decode_32(&p, maplen);
+       epoch = ceph_decode_32(&p);
+       maplen = ceph_decode_32(&p);
        dout("handle_map epoch %u len %d\n", epoch, (int)maplen);
 
        /* do we need it? */
index 09180d8..80daea0 100644 (file)
@@ -60,21 +60,21 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
        ceph_decode_16_safe(p, end, version, bad);
 
        ceph_decode_need(p, end, 8*sizeof(u32) + sizeof(u64), bad);
-       ceph_decode_32(p, m->m_epoch);
-       ceph_decode_32(p, m->m_client_epoch);
-       ceph_decode_32(p, m->m_last_failure);
-       ceph_decode_32(p, m->m_root);
-       ceph_decode_32(p, m->m_session_timeout);
-       ceph_decode_32(p, m->m_session_autoclose);
-       ceph_decode_64(p, m->m_max_file_size);
-       ceph_decode_32(p, m->m_max_mds);
+       m->m_epoch = ceph_decode_32(p);
+       m->m_client_epoch = ceph_decode_32(p);
+       m->m_last_failure = ceph_decode_32(p);
+       m->m_root = ceph_decode_32(p);
+       m->m_session_timeout = ceph_decode_32(p);
+       m->m_session_autoclose = ceph_decode_32(p);
+       m->m_max_file_size = ceph_decode_64(p);
+       m->m_max_mds = ceph_decode_32(p);
 
        m->m_info = kcalloc(m->m_max_mds, sizeof(*m->m_info), GFP_NOFS);
        if (m->m_info == NULL)
                goto badmem;
 
        /* pick out active nodes from mds_info (state > 0) */
-       ceph_decode_32(p, n);
+       n = ceph_decode_32(p);
        for (i = 0; i < n; i++) {
                u32 namelen;
                s32 mds, inc, state;
@@ -86,18 +86,18 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
 
                ceph_decode_need(p, end, sizeof(addr) + 1 + sizeof(u32), bad);
                ceph_decode_copy(p, &addr, sizeof(addr));
-               ceph_decode_8(p, infoversion);
-               ceph_decode_32(p, namelen);  /* skip mds name */
+               infoversion = ceph_decode_8(p);
+               namelen = ceph_decode_32(p);  /* skip mds name */
                *p += namelen;
 
                ceph_decode_need(p, end,
                                 4*sizeof(u32) + sizeof(u64) +
                                 sizeof(addr) + sizeof(struct ceph_timespec),
                                 bad);
-               ceph_decode_32(p, mds);
-               ceph_decode_32(p, inc);
-               ceph_decode_32(p, state);
-               ceph_decode_64(p, state_seq);
+               mds = ceph_decode_32(p);
+               inc = ceph_decode_32(p);
+               state = ceph_decode_32(p);
+               state_seq = ceph_decode_64(p);
                *p += sizeof(addr);
                *p += sizeof(struct ceph_timespec);
                *p += sizeof(u32);
@@ -123,8 +123,8 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
                                        kcalloc(num_export_targets, sizeof(u32),
                                                GFP_NOFS);
                                for (j = 0; j < num_export_targets; j++)
-                                       ceph_decode_32(&pexport_targets,
-                                             m->m_info[mds].export_targets[j]);
+                                       m->m_info[mds].export_targets[j] =
+                                              ceph_decode_32(&pexport_targets);
                        } else {
                                m->m_info[mds].export_targets = NULL;
                        }
@@ -139,8 +139,8 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
                goto badmem;
        ceph_decode_need(p, end, sizeof(u32)*(n+1), bad);
        for (i = 0; i < n; i++)
-               ceph_decode_32(p, m->m_data_pg_pools[i]);
-       ceph_decode_32(p, m->m_cas_pg_pool);
+               m->m_data_pg_pools[i] = ceph_decode_32(p);
+       m->m_cas_pg_pool = ceph_decode_32(p);
 
        /* ok, we don't care about the rest. */
        dout("mdsmap_decode success epoch %u\n", m->m_epoch);
index d6c8e78..bea2be9 100644 (file)
@@ -45,9 +45,9 @@ struct ceph_monmap *ceph_monmap_decode(void *p, void *end)
 
        ceph_decode_need(&p, end, sizeof(fsid) + 2*sizeof(u32), bad);
        ceph_decode_copy(&p, &fsid, sizeof(fsid));
-       ceph_decode_32(&p, epoch);
+       epoch = ceph_decode_32(&p);
 
-       ceph_decode_32(&p, num_mon);
+       num_mon = ceph_decode_32(&p);
        ceph_decode_need(&p, end, num_mon*sizeof(m->mon_inst[0]), bad);
 
        if (num_mon >= CEPH_MAX_MON)
index 8e33928..bbd9a5d 100644 (file)
@@ -894,8 +894,8 @@ void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
        dout(" %d inc maps\n", nr_maps);
        while (nr_maps > 0) {
                ceph_decode_need(&p, end, 2*sizeof(u32), bad);
-               ceph_decode_32(&p, epoch);
-               ceph_decode_32(&p, maplen);
+               epoch = ceph_decode_32(&p);
+               maplen = ceph_decode_32(&p);
                ceph_decode_need(&p, end, maplen, bad);
                next = p + maplen;
                if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
@@ -927,8 +927,8 @@ void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
        dout(" %d full maps\n", nr_maps);
        while (nr_maps) {
                ceph_decode_need(&p, end, 2*sizeof(u32), bad);
-               ceph_decode_32(&p, epoch);
-               ceph_decode_32(&p, maplen);
+               epoch = ceph_decode_32(&p);
+               maplen = ceph_decode_32(&p);
                ceph_decode_need(&p, end, maplen, bad);
                if (nr_maps > 1) {
                        dout("skipping non-latest full map %u len %d\n",
index 342e5f8..6f0aeff 100644 (file)
@@ -67,7 +67,7 @@ static int crush_decode_uniform_bucket(void **p, void *end,
 {
        dout("crush_decode_uniform_bucket %p to %p\n", *p, end);
        ceph_decode_need(p, end, (1+b->h.size) * sizeof(u32), bad);
-       ceph_decode_32(p, b->item_weight);
+       b->item_weight = ceph_decode_32(p);
        return 0;
 bad:
        return -EINVAL;
@@ -86,8 +86,8 @@ static int crush_decode_list_bucket(void **p, void *end,
                return -ENOMEM;
        ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
        for (j = 0; j < b->h.size; j++) {
-               ceph_decode_32(p, b->item_weights[j]);
-               ceph_decode_32(p, b->sum_weights[j]);
+               b->item_weights[j] = ceph_decode_32(p);
+               b->sum_weights[j] = ceph_decode_32(p);
        }
        return 0;
 bad:
@@ -105,7 +105,7 @@ static int crush_decode_tree_bucket(void **p, void *end,
                return -ENOMEM;
        ceph_decode_need(p, end, b->num_nodes * sizeof(u32), bad);
        for (j = 0; j < b->num_nodes; j++)
-               ceph_decode_32(p, b->node_weights[j]);
+               b->node_weights[j] = ceph_decode_32(p);
        return 0;
 bad:
        return -EINVAL;
@@ -124,8 +124,8 @@ static int crush_decode_straw_bucket(void **p, void *end,
                return -ENOMEM;
        ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
        for (j = 0; j < b->h.size; j++) {
-               ceph_decode_32(p, b->item_weights[j]);
-               ceph_decode_32(p, b->straws[j]);
+               b->item_weights[j] = ceph_decode_32(p);
+               b->straws[j] = ceph_decode_32(p);
        }
        return 0;
 bad:
@@ -148,15 +148,15 @@ static struct crush_map *crush_decode(void *pbyval, void *end)
                return ERR_PTR(-ENOMEM);
 
        ceph_decode_need(p, end, 4*sizeof(u32), bad);
-       ceph_decode_32(p, magic);
+       magic = ceph_decode_32(p);
        if (magic != CRUSH_MAGIC) {
                pr_err("crush_decode magic %x != current %x\n",
                       (unsigned)magic, (unsigned)CRUSH_MAGIC);
                goto bad;
        }
-       ceph_decode_32(p, c->max_buckets);
-       ceph_decode_32(p, c->max_rules);
-       ceph_decode_32(p, c->max_devices);
+       c->max_buckets = ceph_decode_32(p);
+       c->max_rules = ceph_decode_32(p);
+       c->max_devices = ceph_decode_32(p);
 
        c->device_parents = kcalloc(c->max_devices, sizeof(u32), GFP_NOFS);
        if (c->device_parents == NULL)
@@ -208,11 +208,11 @@ static struct crush_map *crush_decode(void *pbyval, void *end)
                        goto badmem;
 
                ceph_decode_need(p, end, 4*sizeof(u32), bad);
-               ceph_decode_32(p, b->id);
-               ceph_decode_16(p, b->type);
-               ceph_decode_16(p, b->alg);
-               ceph_decode_32(p, b->weight);
-               ceph_decode_32(p, b->size);
+               b->id = ceph_decode_32(p);
+               b->type = ceph_decode_16(p);
+               b->alg = ceph_decode_16(p);
+               b->weight = ceph_decode_32(p);
+               b->size = ceph_decode_32(p);
 
                dout("crush_decode bucket size %d off %x %p to %p\n",
                     b->size, (int)(*p-start), *p, end);
@@ -227,7 +227,7 @@ static struct crush_map *crush_decode(void *pbyval, void *end)
 
                ceph_decode_need(p, end, b->size*sizeof(u32), bad);
                for (j = 0; j < b->size; j++)
-                       ceph_decode_32(p, b->items[j]);
+                       b->items[j] = ceph_decode_32(p);
 
                switch (b->alg) {
                case CRUSH_BUCKET_UNIFORM:
@@ -290,9 +290,9 @@ static struct crush_map *crush_decode(void *pbyval, void *end)
                ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
                ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
                for (j = 0; j < r->len; j++) {
-                       ceph_decode_32(p, r->steps[j].op);
-                       ceph_decode_32(p, r->steps[j].arg1);
-                       ceph_decode_32(p, r->steps[j].arg2);
+                       r->steps[j].op = ceph_decode_32(p);
+                       r->steps[j].arg1 = ceph_decode_32(p);
+                       r->steps[j].arg2 = ceph_decode_32(p);
                }
        }
 
@@ -411,11 +411,11 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
 
        ceph_decode_need(p, end, 2*sizeof(u64)+6*sizeof(u32), bad);
        ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
-       ceph_decode_32(p, map->epoch);
+       map->epoch = ceph_decode_32(p);
        ceph_decode_copy(p, &map->created, sizeof(map->created));
        ceph_decode_copy(p, &map->modified, sizeof(map->modified));
 
-       ceph_decode_32(p, map->num_pools);
+       map->num_pools = ceph_decode_32(p);
        map->pg_pool = kcalloc(map->num_pools, sizeof(*map->pg_pool),
                               GFP_NOFS);
        if (!map->pg_pool) {
@@ -425,7 +425,7 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
        ceph_decode_32_safe(p, end, max, bad);
        while (max--) {
                ceph_decode_need(p, end, 4+sizeof(map->pg_pool->v), bad);
-               ceph_decode_32(p, i);
+               i = ceph_decode_32(p);
                if (i >= map->num_pools)
                        goto bad;
                ceph_decode_copy(p, &map->pg_pool[i].v,
@@ -438,7 +438,7 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
 
        ceph_decode_32_safe(p, end, map->flags, bad);
 
-       ceph_decode_32(p, max);
+       max = ceph_decode_32(p);
 
        /* (re)alloc osd arrays */
        err = osdmap_set_max_osd(map, max);
@@ -456,7 +456,7 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
 
        *p += 4; /* skip length field (should match max) */
        for (i = 0; i < map->max_osd; i++)
-               ceph_decode_32(p, map->osd_weight[i]);
+               map->osd_weight[i] = ceph_decode_32(p);
 
        *p += 4; /* skip length field (should match max) */
        ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
@@ -469,8 +469,8 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
                struct ceph_pg_mapping *pg;
 
                ceph_decode_need(p, end, sizeof(u32) + sizeof(u64), bad);
-               ceph_decode_64(p, pgid);
-               ceph_decode_32(p, n);
+               pgid = ceph_decode_64(p);
+               n = ceph_decode_32(p);
                ceph_decode_need(p, end, n * sizeof(u32), bad);
                pg = kmalloc(sizeof(*pg) + n*sizeof(u32), GFP_NOFS);
                if (!pg) {
@@ -480,7 +480,7 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
                pg->pgid = pgid;
                pg->len = n;
                for (j = 0; j < n; j++)
-                       ceph_decode_32(p, pg->osds[j]);
+                       pg->osds[j] = ceph_decode_32(p);
 
                err = __insert_pg_mapping(pg, &map->pg_temp);
                if (err)
@@ -537,10 +537,10 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
        ceph_decode_need(p, end, sizeof(fsid)+sizeof(modified)+2*sizeof(u32),
                         bad);
        ceph_decode_copy(p, &fsid, sizeof(fsid));
-       ceph_decode_32(p, epoch);
+       epoch = ceph_decode_32(p);
        BUG_ON(epoch != map->epoch+1);
        ceph_decode_copy(p, &modified, sizeof(modified));
-       ceph_decode_32(p, new_flags);
+       new_flags = ceph_decode_32(p);
 
        /* full map? */
        ceph_decode_32_safe(p, end, len, bad);
@@ -568,7 +568,7 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
        ceph_decode_need(p, end, 5*sizeof(u32), bad);
 
        /* new max? */
-       ceph_decode_32(p, max);
+       max = ceph_decode_32(p);
        if (max >= 0) {
                err = osdmap_set_max_osd(map, max);
                if (err < 0)
@@ -641,8 +641,8 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
        while (len--) {
                u32 osd, off;
                ceph_decode_need(p, end, sizeof(u32)*2, bad);
-               ceph_decode_32(p, osd);
-               ceph_decode_32(p, off);
+               osd = ceph_decode_32(p);
+               off = ceph_decode_32(p);
                pr_info("osd%d weight 0x%x %s\n", osd, off,
                     off == CEPH_OSD_IN ? "(in)" :
                     (off == CEPH_OSD_OUT ? "(out)" : ""));
@@ -659,8 +659,8 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
                u64 pgid;
                u32 pglen;
                ceph_decode_need(p, end, sizeof(u64) + sizeof(u32), bad);
-               ceph_decode_64(p, pgid);
-               ceph_decode_32(p, pglen);
+               pgid = ceph_decode_64(p);
+               pglen = ceph_decode_32(p);
 
                /* remove any? */
                while (rbp && rb_entry(rbp, struct ceph_pg_mapping,
@@ -683,7 +683,7 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
                        pg->pgid = pgid;
                        pg->len = pglen;
                        for (j = 0; j < len; j++)
-                               ceph_decode_32(p, pg->osds[j]);
+                               pg->osds[j] = ceph_decode_32(p);
                        err = __insert_pg_mapping(pg, &map->pg_temp);
                        if (err)
                                goto bad;