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ceph: convert encode/decode macros to inlines

Browse source 
This avoids the fugly pass by reference and makes the code a bit easier
to read.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2009-10-14 09:59:09 -07:00
parent 535bbb5307
commit c89136ea42
6 changed files with 137 additions and 132 deletions
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129
fs/ceph/decode.h
View 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.
*/
@ -18,48 +50,20 @@
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) \
@ -71,41 +75,42 @@
/*
* 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

20
fs/ceph/mds_client.c
View 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? */

38
fs/ceph/mdsmap.c
View 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);

4
fs/ceph/mon_client.c
View 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)

8
fs/ceph/osd_client.c
View 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",

70
fs/ceph/osdmap.c
View 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;