From 3d14c5d2b6e15c21d8e5467dc62d33127c23a644 Mon Sep 17 00:00:00 2001 From: Yehuda Sadeh Date: Tue, 6 Apr 2010 15:14:15 -0700 Subject: ceph: factor out libceph from Ceph file system This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil --- net/ceph/msgpool.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 net/ceph/msgpool.c (limited to 'net/ceph/msgpool.c') diff --git a/net/ceph/msgpool.c b/net/ceph/msgpool.c new file mode 100644 index 0000000..d5f2d97 --- /dev/null +++ b/net/ceph/msgpool.c @@ -0,0 +1,64 @@ +#include + +#include +#include +#include +#include + +#include + +static void *alloc_fn(gfp_t gfp_mask, void *arg) +{ + struct ceph_msgpool *pool = arg; + void *p; + + p = ceph_msg_new(0, pool->front_len, gfp_mask); + if (!p) + pr_err("msgpool %s alloc failed\n", pool->name); + return p; +} + +static void free_fn(void *element, void *arg) +{ + ceph_msg_put(element); +} + +int ceph_msgpool_init(struct ceph_msgpool *pool, + int front_len, int size, bool blocking, const char *name) +{ + pool->front_len = front_len; + pool->pool = mempool_create(size, alloc_fn, free_fn, pool); + if (!pool->pool) + return -ENOMEM; + pool->name = name; + return 0; +} + +void ceph_msgpool_destroy(struct ceph_msgpool *pool) +{ + mempool_destroy(pool->pool); +} + +struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, + int front_len) +{ + if (front_len > pool->front_len) { + pr_err("msgpool_get pool %s need front %d, pool size is %d\n", + pool->name, front_len, pool->front_len); + WARN_ON(1); + + /* try to alloc a fresh message */ + return ceph_msg_new(0, front_len, GFP_NOFS); + } + + return mempool_alloc(pool->pool, GFP_NOFS); +} + +void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg) +{ + /* reset msg front_len; user may have changed it */ + msg->front.iov_len = pool->front_len; + msg->hdr.front_len = cpu_to_le32(pool->front_len); + + kref_init(&msg->kref); /* retake single ref */ +} -- cgit v1.1