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ceph: simplify ceph_buffer interface

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We never allocate the ceph_buffer and buffer separtely, so use a single
constructor.

Disallow put on NULL buffer; make the caller check.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2009-12-07 12:17:17 -08:00
parent dd26d857a7
commit b6c1d5b81e
5 changed files with 35 additions and 29 deletions
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23
fs/ceph/buffer.c
View file

@ -2,23 +2,38 @@
#include "ceph_debug.h"
#include "buffer.h"
struct ceph_buffer *ceph_buffer_new(gfp_t gfp)
struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp)
{
struct ceph_buffer *b;
b = kmalloc(sizeof(*b), gfp);
if (!b)
return NULL;
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);
if (!b->vec.iov_base) {
kfree(b);
return NULL;
}
b->is_vmalloc = true;
}
kref_init(&b->kref);
b->vec.iov_base = NULL;
b->vec.iov_len = 0;
b->alloc_len = 0;
b->alloc_len = len;
b->vec.iov_len = len;
dout("buffer_new %p\n", b);
return b;
}
void ceph_buffer_release(struct kref *kref)
{
struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
dout("buffer_release %p\n", b);
if (b->vec.iov_base) {
if (b->is_vmalloc)
vfree(b->vec.iov_base);