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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

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Pull Ceph fix from Sage Weil:
 "This fixes a bug in the new message decoding that just went in during
  the last window."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  libceph: fix decoding of pgids
This commit is contained in:
Linus Torvalds 2013-03-12 09:22:42 -07:00
commit 368edaadc0
1 changed files with 29 additions and 13 deletions
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42
net/ceph/osdmap.c
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@ -654,6 +654,24 @@ static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
return 0;
}
static int __decode_pgid(void **p, void *end, struct ceph_pg *pg)
{
u8 v;
ceph_decode_need(p, end, 1+8+4+4, bad);
v = ceph_decode_8(p);
if (v != 1)
goto bad;
pg->pool = ceph_decode_64(p);
pg->seed = ceph_decode_32(p);
*p += 4; /* skip preferred */
return 0;
bad:
dout("error decoding pgid\n");
return -EINVAL;
}
/*
* decode a full map.
*/
@ -745,13 +763,12 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
for (i = 0; i < len; i++) {
int n, j;
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_v1, sizeof(pgid_v1));
pgid.pool = le32_to_cpu(pgid_v1.pool);
pgid.seed = le16_to_cpu(pgid_v1.ps);
err = __decode_pgid(p, end, &pgid);
if (err)
goto bad;
ceph_decode_need(p, end, sizeof(u32), bad);
n = ceph_decode_32(p);
err = -EINVAL;
if (n > (UINT_MAX - sizeof(*pg)) / sizeof(u32))
@ -818,8 +835,8 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
u16 version;
ceph_decode_16_safe(p, end, version, bad);
if (version > 6) {
pr_warning("got unknown v %d > %d of inc osdmap\n", version, 6);
if (version != 6) {
pr_warning("got unknown v %d != 6 of inc osdmap\n", version);
goto bad;
}
@ -963,15 +980,14 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
while (len--) {
struct ceph_pg_mapping *pg;
int j;
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_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);
err = __decode_pgid(p, end, &pgid);
if (err)
goto bad;
ceph_decode_need(p, end, sizeof(u32), bad);
pglen = ceph_decode_32(p);
if (pglen) {
ceph_decode_need(p, end, pglen*sizeof(u32), bad);