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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495// SPDX-License-Identifier: GPL-2.0#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/messenger.h>#include <linux/ceph/msgpool.h>
static void *msgpool_alloc(gfp_t gfp_mask, void *arg){ struct ceph_msgpool *pool = arg; struct ceph_msg *msg;
msg = ceph_msg_new2(pool->type, pool->front_len, pool->max_data_items, gfp_mask, true); if (!msg) { dout("msgpool_alloc %s failed\n", pool->name); } else { dout("msgpool_alloc %s %p\n", pool->name, msg); msg->pool = pool; } return msg;}
static void msgpool_free(void *element, void *arg){ struct ceph_msgpool *pool = arg; struct ceph_msg *msg = element;
dout("msgpool_release %s %p\n", pool->name, msg); msg->pool = NULL; ceph_msg_put(msg);}
int ceph_msgpool_init(struct ceph_msgpool *pool, int type, int front_len, int max_data_items, int size, const char *name){ dout("msgpool %s init\n", name); pool->type = type; pool->front_len = front_len; pool->max_data_items = max_data_items; pool->pool = mempool_create(size, msgpool_alloc, msgpool_free, pool); if (!pool->pool) return -ENOMEM; pool->name = name; return 0;}
void ceph_msgpool_destroy(struct ceph_msgpool *pool){ dout("msgpool %s destroy\n", pool->name); mempool_destroy(pool->pool);}
struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, int front_len, int max_data_items){ struct ceph_msg *msg;
if (front_len > pool->front_len || max_data_items > pool->max_data_items) { pr_warn_ratelimited("%s need %d/%d, pool %s has %d/%d\n", __func__, front_len, max_data_items, pool->name, pool->front_len, pool->max_data_items); WARN_ON_ONCE(1);
/* try to alloc a fresh message */ return ceph_msg_new2(pool->type, front_len, max_data_items, GFP_NOFS, false); }
msg = mempool_alloc(pool->pool, GFP_NOFS); dout("msgpool_get %s %p\n", pool->name, msg); return msg;}
void ceph_msgpool_put(struct ceph_msgpool *pool, struct ceph_msg *msg){ dout("msgpool_put %s %p\n", pool->name, 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);
msg->data_length = 0; msg->num_data_items = 0;
kref_init(&msg->kref); /* retake single ref */ mempool_free(msg, pool->pool);}