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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960// SPDX-License-Identifier: GPL-2.0
#include <linux/ceph/ceph_debug.h>
#include <linux/module.h>#include <linux/slab.h>
#include <linux/ceph/buffer.h>#include <linux/ceph/decode.h>#include <linux/ceph/libceph.h> /* for kvmalloc */
struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp){ struct ceph_buffer *b;
b = kmalloc_obj(*b, gfp); if (!b) return NULL;
b->vec.iov_base = kvmalloc(len, gfp); if (!b->vec.iov_base) { kfree(b); return NULL; }
kref_init(&b->kref); b->alloc_len = len; b->vec.iov_len = len; dout("buffer_new %p\n", b); return b;}EXPORT_SYMBOL(ceph_buffer_new);
void ceph_buffer_release(struct kref *kref){ struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
dout("buffer_release %p\n", b); kvfree(b->vec.iov_base); kfree(b);}EXPORT_SYMBOL(ceph_buffer_release);
int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end){ size_t len;
ceph_decode_need(p, end, sizeof(u32), bad); len = ceph_decode_32(p); dout("decode_buffer len %d\n", (int)len); ceph_decode_need(p, end, len, bad); *b = ceph_buffer_new(len, GFP_NOFS); if (!*b) return -ENOMEM; ceph_decode_copy(p, (*b)->vec.iov_base, len); return 0;bad: return -EINVAL;}