2009-10-06 20:31:07 +02:00
|
|
|
|
|
|
|
#include "ceph_debug.h"
|
|
|
|
#include "buffer.h"
|
|
|
|
|
|
|
|
struct ceph_buffer *ceph_buffer_new(gfp_t gfp)
|
|
|
|
{
|
|
|
|
struct ceph_buffer *b;
|
|
|
|
|
|
|
|
b = kmalloc(sizeof(*b), gfp);
|
|
|
|
if (!b)
|
|
|
|
return NULL;
|
2009-12-05 19:13:33 +01:00
|
|
|
kref_init(&b->kref);
|
2009-10-06 20:31:07 +02:00
|
|
|
b->vec.iov_base = NULL;
|
|
|
|
b->vec.iov_len = 0;
|
|
|
|
b->alloc_len = 0;
|
|
|
|
return b;
|
|
|
|
}
|
|
|
|
|
2009-12-05 19:13:33 +01:00
|
|
|
void ceph_buffer_release(struct kref *kref)
|
|
|
|
{
|
|
|
|
struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
|
|
|
|
if (b->vec.iov_base) {
|
|
|
|
if (b->is_vmalloc)
|
|
|
|
vfree(b->vec.iov_base);
|
|
|
|
else
|
|
|
|
kfree(b->vec.iov_base);
|
|
|
|
}
|
|
|
|
kfree(b);
|
|
|
|
}
|
|
|
|
|
2009-10-06 20:31:07 +02:00
|
|
|
int ceph_buffer_alloc(struct ceph_buffer *b, int len, gfp_t gfp)
|
|
|
|
{
|
|
|
|
b->vec.iov_base = kmalloc(len, gfp | __GFP_NOWARN);
|
|
|
|
if (b->vec.iov_base) {
|
|
|
|
b->is_vmalloc = false;
|
|
|
|
} else {
|
|
|
|
b->vec.iov_base = __vmalloc(len, gfp, PAGE_KERNEL);
|
|
|
|
b->is_vmalloc = true;
|
|
|
|
}
|
|
|
|
if (!b->vec.iov_base)
|
|
|
|
return -ENOMEM;
|
|
|
|
b->alloc_len = len;
|
|
|
|
b->vec.iov_len = len;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|