From 8f3bc053c610826a657714649ea596f07875db2e Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Wed, 14 Oct 2009 17:36:07 -0700 Subject: [PATCH] ceph: warn on allocation from msgpool with larger front_len Pass the front_len we need when pulling a message off a msgpool, and WARN if it is greater than the pool's size. Then try to allocate a new message (to continue without failing). Signed-off-by: Sage Weil --- fs/ceph/mon_client.c | 7 ++++--- fs/ceph/msgpool.c | 20 +++++++++++++++++--- fs/ceph/msgpool.h | 3 ++- fs/ceph/osd_client.c | 5 +++-- 4 files changed, 26 insertions(+), 9 deletions(-) diff --git a/fs/ceph/mon_client.c b/fs/ceph/mon_client.c index d52e52968d01..e6e954cac6b9 100644 --- a/fs/ceph/mon_client.c +++ b/fs/ceph/mon_client.c @@ -639,14 +639,15 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, { struct ceph_mon_client *monc = con->private; int type = le16_to_cpu(hdr->type); + int front = le32_to_cpu(hdr->front_len); switch (type) { case CEPH_MSG_CLIENT_MOUNT_ACK: - return ceph_msgpool_get(&monc->msgpool_mount_ack); + return ceph_msgpool_get(&monc->msgpool_mount_ack, front); case CEPH_MSG_MON_SUBSCRIBE_ACK: - return ceph_msgpool_get(&monc->msgpool_subscribe_ack); + return ceph_msgpool_get(&monc->msgpool_subscribe_ack, front); case CEPH_MSG_STATFS_REPLY: - return ceph_msgpool_get(&monc->msgpool_statfs_reply); + return ceph_msgpool_get(&monc->msgpool_statfs_reply, front); } return ceph_alloc_msg(con, hdr); } diff --git a/fs/ceph/msgpool.c b/fs/ceph/msgpool.c index 39d4d7ed82ce..7599b3382076 100644 --- a/fs/ceph/msgpool.c +++ b/fs/ceph/msgpool.c @@ -101,14 +101,28 @@ int ceph_msgpool_resv(struct ceph_msgpool *pool, int delta) return ret; } -struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool) +struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, int front_len) { wait_queue_t wait; struct ceph_msg *msg; + if (front_len && front_len > pool->front_len) { + pr_err("msgpool_get pool %p need front %d, pool size is %d\n", + pool, front_len, pool->front_len); + WARN_ON(1); + + /* try to alloc a fresh message */ + msg = ceph_msg_new(0, front_len, 0, 0, NULL); + if (!IS_ERR(msg)) + return msg; + } + + if (!front_len) + front_len = pool->front_len; + if (pool->blocking) { /* mempool_t behavior; first try to alloc */ - msg = ceph_msg_new(0, pool->front_len, 0, 0, NULL); + msg = ceph_msg_new(0, front_len, 0, 0, NULL); if (!IS_ERR(msg)) return msg; } @@ -133,7 +147,7 @@ struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool) WARN_ON(1); /* maybe we can allocate it now? */ - msg = ceph_msg_new(0, pool->front_len, 0, 0, NULL); + msg = ceph_msg_new(0, front_len, 0, 0, NULL); if (!IS_ERR(msg)) return msg; diff --git a/fs/ceph/msgpool.h b/fs/ceph/msgpool.h index 07a2decaa6d8..bc834bfcd720 100644 --- a/fs/ceph/msgpool.h +++ b/fs/ceph/msgpool.h @@ -20,7 +20,8 @@ extern int ceph_msgpool_init(struct ceph_msgpool *pool, int front_len, int size, bool blocking); extern void ceph_msgpool_destroy(struct ceph_msgpool *pool); extern int ceph_msgpool_resv(struct ceph_msgpool *, int delta); -extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *); +extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *, + int front_len); extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *); #endif diff --git a/fs/ceph/osd_client.c b/fs/ceph/osd_client.c index bbd9a5d23712..0a254054a82a 100644 --- a/fs/ceph/osd_client.c +++ b/fs/ceph/osd_client.c @@ -161,7 +161,7 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, if (snapc) msg_size += sizeof(u64) * snapc->num_snaps; if (use_mempool) - msg = ceph_msgpool_get(&osdc->msgpool_op); + msg = ceph_msgpool_get(&osdc->msgpool_op, 0); else msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, 0, 0, NULL); if (IS_ERR(msg)) { @@ -1271,10 +1271,11 @@ static struct ceph_msg *alloc_msg(struct ceph_connection *con, struct ceph_osd *osd = con->private; struct ceph_osd_client *osdc = osd->o_osdc; int type = le16_to_cpu(hdr->type); + int front = le32_to_cpu(hdr->front_len); switch (type) { case CEPH_MSG_OSD_OPREPLY: - return ceph_msgpool_get(&osdc->msgpool_op_reply); + return ceph_msgpool_get(&osdc->msgpool_op_reply, front); } return ceph_alloc_msg(con, hdr); } -- 2.30.2