Merge remote-tracking branch 'remotes/kvaneesh/tags/for-upstream-signed' into staging

VirtFS update:

Cleanups mostly isolating virtio related details into separate files. This
is done to enable easy addition of Xen transport for VirtFS.

The changes include:

1. Rename a bunch of files and functions to make clear they are generic.
2. disentangle virtio transport code and generic 9pfs code.
3. Some function name clean-up.

# gpg: Signature made Tue 12 Jan 2016 06:04:35 GMT using RSA key ID 04C4E23A
# gpg: Good signature from "Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 4846 9DE7 1860 360F A6E9  968C DE41 A4FE 04C4 E23A

* remotes/kvaneesh/tags/for-upstream-signed: (25 commits)
  9pfs: introduce V9fsVirtioState
  9pfs: factor out v9fs_device_{,un}realize_common
  9pfs: rename virtio-9p.c to 9p.c
  9pfs: rename virtio_9p_set_fd_limit to use v9fs_ prefix
  9pfs: move handle_9p_output and make it static function
  9pfs: export pdu_{submit,alloc,free}
  9pfs: factor out virtio_9p_push_and_notify
  9pfs: break out 9p.h from virtio-9p.h
  9pfs: break out virtio_init_iov_from_pdu
  9pfs: factor out pdu_push_and_notify
  9pfs: factor out virtio_pdu_{,un}marshal
  9pfs: make pdu_{,un}marshal proper functions
  9pfs: PDU processing functions should start pdu_ prefix
  9pfs: PDU processing functions don't need to take V9fsState as argument
  fsdev: rename virtio-9p-marshal.{c,h} to 9p-iov-marshal.{c,h}
  fsdev: break out 9p-marshal.{c,h} from virtio-9p-marshal.{c,h}
  9pfs: remove dead code
  9pfs: merge hw/virtio/virtio-9p.h into hw/9pfs/virtio-9p.h
  9pfs: rename virtio-9p-xattr{,-user}.{c,h} to 9p-xattr{,-user}.{c,h}
  9pfs: rename virtio-9p-synth.{c,h} to 9p-synth.{c,h}
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 99 insertions, 0 deletions

diff --git a/hw/9pfs/coth.h b/hw/9pfs/coth.h
new file mode 100644
index 0000000000..209fc6a9af
--- /dev/null
+++ b/hw/9pfs/coth.h
@@ -0,0 +1,99 @@
+/*
+ * 9p backend
+ *
+ * Copyright IBM, Corp. 2010
+ *
+ * Authors:
+ *  Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
+ *  Venkateswararao Jujjuri(JV) <jvrao@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef _QEMU_9P_COTH_H
+#define _QEMU_9P_COTH_H
+
+#include "qemu/thread.h"
+#include "qemu/coroutine.h"
+#include "virtio-9p.h"
+
+/*
+ * we want to use bottom half because we want to make sure the below
+ * sequence of events.
+ *
+ *   1. Yield the coroutine in the QEMU thread.
+ *   2. Submit the coroutine to a worker thread.
+ *   3. Enter the coroutine in the worker thread.
+ * we cannot swap step 1 and 2, because that would imply worker thread
+ * can enter coroutine while step1 is still running
+ */
+#define v9fs_co_run_in_worker(code_block)                               \
+    do {                                                                \
+        QEMUBH *co_bh;                                                  \
+        co_bh = qemu_bh_new(co_run_in_worker_bh,                        \
+                            qemu_coroutine_self());                     \
+        qemu_bh_schedule(co_bh);                                        \
+        /*                                                              \
+         * yield in qemu thread and re-enter back                       \
+         * in worker thread                                             \
+         */                                                             \
+        qemu_coroutine_yield();                                         \
+        qemu_bh_delete(co_bh);                                          \
+        code_block;                                                     \
+        /* re-enter back to qemu thread */                              \
+        qemu_coroutine_yield();                                         \
+    } while (0)
+
+extern void co_run_in_worker_bh(void *);
+extern int v9fs_init_worker_threads(void);
+extern int v9fs_co_readlink(V9fsPDU *, V9fsPath *, V9fsString *);
+extern int v9fs_co_readdir_r(V9fsPDU *, V9fsFidState *,
+                           struct dirent *, struct dirent **result);
+extern off_t v9fs_co_telldir(V9fsPDU *, V9fsFidState *);
+extern void v9fs_co_seekdir(V9fsPDU *, V9fsFidState *, off_t);
+extern void v9fs_co_rewinddir(V9fsPDU *, V9fsFidState *);
+extern int v9fs_co_statfs(V9fsPDU *, V9fsPath *, struct statfs *);
+extern int v9fs_co_lstat(V9fsPDU *, V9fsPath *, struct stat *);
+extern int v9fs_co_chmod(V9fsPDU *, V9fsPath *, mode_t);
+extern int v9fs_co_utimensat(V9fsPDU *, V9fsPath *, struct timespec [2]);
+extern int v9fs_co_chown(V9fsPDU *, V9fsPath *, uid_t, gid_t);
+extern int v9fs_co_truncate(V9fsPDU *, V9fsPath *, off_t);
+extern int v9fs_co_llistxattr(V9fsPDU *, V9fsPath *, void *, size_t);
+extern int v9fs_co_lgetxattr(V9fsPDU *, V9fsPath *,
+                             V9fsString *, void *, size_t);
+extern int v9fs_co_mknod(V9fsPDU *, V9fsFidState *, V9fsString *, uid_t,
+                         gid_t, dev_t, mode_t, struct stat *);
+extern int v9fs_co_mkdir(V9fsPDU *, V9fsFidState *, V9fsString *,
+                         mode_t, uid_t, gid_t, struct stat *);
+extern int v9fs_co_remove(V9fsPDU *, V9fsPath *);
+extern int v9fs_co_rename(V9fsPDU *, V9fsPath *, V9fsPath *);
+extern int v9fs_co_unlinkat(V9fsPDU *, V9fsPath *, V9fsString *, int flags);
+extern int v9fs_co_renameat(V9fsPDU *, V9fsPath *, V9fsString *,
+                            V9fsPath *, V9fsString *);
+extern int v9fs_co_fstat(V9fsPDU *, V9fsFidState *, struct stat *);
+extern int v9fs_co_opendir(V9fsPDU *, V9fsFidState *);
+extern int v9fs_co_open(V9fsPDU *, V9fsFidState *, int);
+extern int v9fs_co_open2(V9fsPDU *, V9fsFidState *, V9fsString *,
+                         gid_t, int, int, struct stat *);
+extern int v9fs_co_lsetxattr(V9fsPDU *, V9fsPath *, V9fsString *,
+                             void *, size_t, int);
+extern int v9fs_co_lremovexattr(V9fsPDU *, V9fsPath *, V9fsString *);
+extern int v9fs_co_closedir(V9fsPDU *, V9fsFidOpenState *);
+extern int v9fs_co_close(V9fsPDU *, V9fsFidOpenState *);
+extern int v9fs_co_fsync(V9fsPDU *, V9fsFidState *, int);
+extern int v9fs_co_symlink(V9fsPDU *, V9fsFidState *, V9fsString *,
+                           const char *, gid_t, struct stat *);
+extern int v9fs_co_link(V9fsPDU *, V9fsFidState *,
+                        V9fsFidState *, V9fsString *);
+extern int v9fs_co_pwritev(V9fsPDU *, V9fsFidState *,
+                           struct iovec *, int, int64_t);
+extern int v9fs_co_preadv(V9fsPDU *, V9fsFidState *,
+                          struct iovec *, int, int64_t);
+extern int v9fs_co_name_to_path(V9fsPDU *, V9fsPath *,
+                                const char *, V9fsPath *);
+extern int v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t,
+                          V9fsStatDotl *v9stat);
+
+#endif