Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / ceph / buffer.c

diff --git a/kernel/net/ceph/buffer.c b/kernel/net/ceph/buffer.c
new file mode 100644 (file)
index 0000000..add5f92
--- /dev/null
+++ b/kernel/net/ceph/buffer.c
@@ -0,0 +1,58 @@
+
+#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 ceph_kvmalloc */
+
+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 = ceph_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;
+}