| #include <linux/ceph/ceph_debug.h> |
| |
| #include <linux/err.h> |
| #include <linux/sched.h> |
| #include <linux/types.h> |
| #include <linux/vmalloc.h> |
| |
| #include <linux/ceph/msgpool.h> |
| |
| 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 */ |
| } |