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authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 10:25:24 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 10:25:24 -0800
commita1703154200c390ab03c10224c586e815d3e31e8 (patch)
treedf90865eed3cfdf7af8664b5453a90e09d17480a /net/ceph
parent67b5ad9a63caa2ce56ddd2b22b802dae00d72c13 (diff)
parent766fc43973b16f9becb6b7402b3e052dbb84adee (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: rbd: fix cleanup when trying to mount inexistent image net/ceph: make ceph_msgr_wq non-reentrant ceph: fsc->*_wq's aren't used in memory reclaim path ceph: Always free allocated memory in osdmap_decode() ceph: Makefile: Remove unnessary code ceph: associate requests with opening sessions ceph: drop redundant r_mds field ceph: implement DIRLAYOUTHASH feature to get dir layout from MDS ceph: add dir_layout to inode
Diffstat (limited to 'net/ceph')
-rw-r--r--net/ceph/ceph_hash.c3
-rw-r--r--net/ceph/messenger.c46
-rw-r--r--net/ceph/osdmap.c4
3 files changed, 8 insertions, 45 deletions
diff --git a/net/ceph/ceph_hash.c b/net/ceph/ceph_hash.c
index 815ef8826796..0a1b53bce76d 100644
--- a/net/ceph/ceph_hash.c
+++ b/net/ceph/ceph_hash.c
@@ -1,5 +1,6 @@
#include <linux/ceph/types.h>
+#include <linux/module.h>
/*
* Robert Jenkin's hash function.
@@ -104,6 +105,7 @@ unsigned ceph_str_hash(int type, const char *s, unsigned len)
return -1;
}
}
+EXPORT_SYMBOL(ceph_str_hash);
const char *ceph_str_hash_name(int type)
{
@@ -116,3 +118,4 @@ const char *ceph_str_hash_name(int type)
return "unknown";
}
}
+EXPORT_SYMBOL(ceph_str_hash_name);
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index b6ff4a1519ab..dff633d62e5b 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -96,7 +96,7 @@ struct workqueue_struct *ceph_msgr_wq;
int ceph_msgr_init(void)
{
- ceph_msgr_wq = create_workqueue("ceph-msgr");
+ ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_NON_REENTRANT, 0);
if (!ceph_msgr_wq) {
pr_err("msgr_init failed to create workqueue\n");
return -ENOMEM;
@@ -1920,20 +1920,6 @@ bad_tag:
/*
* Atomically queue work on a connection. Bump @con reference to
* avoid races with connection teardown.
- *
- * There is some trickery going on with QUEUED and BUSY because we
- * only want a _single_ thread operating on each connection at any
- * point in time, but we want to use all available CPUs.
- *
- * The worker thread only proceeds if it can atomically set BUSY. It
- * clears QUEUED and does it's thing. When it thinks it's done, it
- * clears BUSY, then rechecks QUEUED.. if it's set again, it loops
- * (tries again to set BUSY).
- *
- * To queue work, we first set QUEUED, _then_ if BUSY isn't set, we
- * try to queue work. If that fails (work is already queued, or BUSY)
- * we give up (work also already being done or is queued) but leave QUEUED
- * set so that the worker thread will loop if necessary.
*/
static void queue_con(struct ceph_connection *con)
{
@@ -1948,11 +1934,7 @@ static void queue_con(struct ceph_connection *con)
return;
}
- set_bit(QUEUED, &con->state);
- if (test_bit(BUSY, &con->state)) {
- dout("queue_con %p - already BUSY\n", con);
- con->ops->put(con);
- } else if (!queue_work(ceph_msgr_wq, &con->work.work)) {
+ if (!queue_delayed_work(ceph_msgr_wq, &con->work, 0)) {
dout("queue_con %p - already queued\n", con);
con->ops->put(con);
} else {
@@ -1967,15 +1949,6 @@ static void con_work(struct work_struct *work)
{
struct ceph_connection *con = container_of(work, struct ceph_connection,
work.work);
- int backoff = 0;
-
-more:
- if (test_and_set_bit(BUSY, &con->state) != 0) {
- dout("con_work %p BUSY already set\n", con);
- goto out;
- }
- dout("con_work %p start, clearing QUEUED\n", con);
- clear_bit(QUEUED, &con->state);
mutex_lock(&con->mutex);
@@ -1994,28 +1967,13 @@ more:
try_read(con) < 0 ||
try_write(con) < 0) {
mutex_unlock(&con->mutex);
- backoff = 1;
ceph_fault(con); /* error/fault path */
goto done_unlocked;
}
done:
mutex_unlock(&con->mutex);
-
done_unlocked:
- clear_bit(BUSY, &con->state);
- dout("con->state=%lu\n", con->state);
- if (test_bit(QUEUED, &con->state)) {
- if (!backoff || test_bit(OPENING, &con->state)) {
- dout("con_work %p QUEUED reset, looping\n", con);
- goto more;
- }
- dout("con_work %p QUEUED reset, but just faulted\n", con);
- clear_bit(QUEUED, &con->state);
- }
- dout("con_work %p done\n", con);
-
-out:
con->ops->put(con);
}
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index d73f3f6efa36..71603ac3dff5 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -605,8 +605,10 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
goto bad;
}
err = __decode_pool(p, end, pi);
- if (err < 0)
+ if (err < 0) {
+ kfree(pi);
goto bad;
+ }
__insert_pg_pool(&map->pg_pools, pi);
}

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