Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <linux/ceph/ceph_debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/ceph/buffer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/ceph/decode.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/ceph/libceph.h> /* for ceph_kvmalloc */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	struct ceph_buffer *b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	b = kmalloc(sizeof(*b), gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	if (!b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	b->vec.iov_base = ceph_kvmalloc(len, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	if (!b->vec.iov_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		kfree(b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	kref_init(&b->kref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	b->alloc_len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	b->vec.iov_len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	dout("buffer_new %p\n", b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	return b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) EXPORT_SYMBOL(ceph_buffer_new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) void ceph_buffer_release(struct kref *kref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	dout("buffer_release %p\n", b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	kvfree(b->vec.iov_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	kfree(b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) EXPORT_SYMBOL(ceph_buffer_release);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	ceph_decode_need(p, end, sizeof(u32), bad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	len = ceph_decode_32(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	dout("decode_buffer len %d\n", (int)len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	ceph_decode_need(p, end, len, bad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	*b = ceph_buffer_new(len, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	if (!*b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	ceph_decode_copy(p, (*b)->vec.iov_base, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) bad:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }