Add qemu 2.4.0

[kvmfornfv.git] / qemu / hw / 9pfs / codir.c

diff --git a/qemu/hw/9pfs/codir.c b/qemu/hw/9pfs/codir.c
new file mode 100644 (file)
index 0000000..65ad329
--- /dev/null
+++ b/qemu/hw/9pfs/codir.c
@@ -0,0 +1,168 @@
+
+/*
+ * Virtio 9p backend
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Aneesh Kumar K.V <aneesh.kumar@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.
+ *
+ */
+
+#include "fsdev/qemu-fsdev.h"
+#include "qemu/thread.h"
+#include "block/coroutine.h"
+#include "virtio-9p-coth.h"
+
+int v9fs_co_readdir_r(V9fsPDU *pdu, V9fsFidState *fidp, struct dirent *dent,
+                      struct dirent **result)
+{
+    int err;
+    V9fsState *s = pdu->s;
+
+    if (v9fs_request_cancelled(pdu)) {
+        return -EINTR;
+    }
+    v9fs_co_run_in_worker(
+        {
+            errno = 0;
+            err = s->ops->readdir_r(&s->ctx, &fidp->fs, dent, result);
+            if (!*result && errno) {
+                err = -errno;
+            } else {
+                err = 0;
+            }
+        });
+    return err;
+}
+
+off_t v9fs_co_telldir(V9fsPDU *pdu, V9fsFidState *fidp)
+{
+    off_t err;
+    V9fsState *s = pdu->s;
+
+    if (v9fs_request_cancelled(pdu)) {
+        return -EINTR;
+    }
+    v9fs_co_run_in_worker(
+        {
+            err = s->ops->telldir(&s->ctx, &fidp->fs);
+            if (err < 0) {
+                err = -errno;
+            }
+        });
+    return err;
+}
+
+void v9fs_co_seekdir(V9fsPDU *pdu, V9fsFidState *fidp, off_t offset)
+{
+    V9fsState *s = pdu->s;
+    if (v9fs_request_cancelled(pdu)) {
+        return;
+    }
+    v9fs_co_run_in_worker(
+        {
+            s->ops->seekdir(&s->ctx, &fidp->fs, offset);
+        });
+}
+
+void v9fs_co_rewinddir(V9fsPDU *pdu, V9fsFidState *fidp)
+{
+    V9fsState *s = pdu->s;
+    if (v9fs_request_cancelled(pdu)) {
+        return;
+    }
+    v9fs_co_run_in_worker(
+        {
+            s->ops->rewinddir(&s->ctx, &fidp->fs);
+        });
+}
+
+int v9fs_co_mkdir(V9fsPDU *pdu, V9fsFidState *fidp, V9fsString *name,
+                  mode_t mode, uid_t uid, gid_t gid, struct stat *stbuf)
+{
+    int err;
+    FsCred cred;
+    V9fsPath path;
+    V9fsState *s = pdu->s;
+
+    if (v9fs_request_cancelled(pdu)) {
+        return -EINTR;
+    }
+    cred_init(&cred);
+    cred.fc_mode = mode;
+    cred.fc_uid = uid;
+    cred.fc_gid = gid;
+    v9fs_path_read_lock(s);
+    v9fs_co_run_in_worker(
+        {
+            err = s->ops->mkdir(&s->ctx, &fidp->path, name->data,  &cred);
+            if (err < 0) {
+                err = -errno;
+            } else {
+                v9fs_path_init(&path);
+                err = v9fs_name_to_path(s, &fidp->path, name->data, &path);
+                if (!err) {
+                    err = s->ops->lstat(&s->ctx, &path, stbuf);
+                    if (err < 0) {
+                        err = -errno;
+                    }
+                }
+                v9fs_path_free(&path);
+            }
+        });
+    v9fs_path_unlock(s);
+    return err;
+}
+
+int v9fs_co_opendir(V9fsPDU *pdu, V9fsFidState *fidp)
+{
+    int err;
+    V9fsState *s = pdu->s;
+
+    if (v9fs_request_cancelled(pdu)) {
+        return -EINTR;
+    }
+    v9fs_path_read_lock(s);
+    v9fs_co_run_in_worker(
+        {
+            err = s->ops->opendir(&s->ctx, &fidp->path, &fidp->fs);
+            if (err < 0) {
+                err = -errno;
+            } else {
+                err = 0;
+            }
+        });
+    v9fs_path_unlock(s);
+    if (!err) {
+        total_open_fd++;
+        if (total_open_fd > open_fd_hw) {
+            v9fs_reclaim_fd(pdu);
+        }
+    }
+    return err;
+}
+
+int v9fs_co_closedir(V9fsPDU *pdu, V9fsFidOpenState *fs)
+{
+    int err;
+    V9fsState *s = pdu->s;
+
+    if (v9fs_request_cancelled(pdu)) {
+        return -EINTR;
+    }
+    v9fs_co_run_in_worker(
+        {
+            err = s->ops->closedir(&s->ctx, fs);
+            if (err < 0) {
+                err = -errno;
+            }
+        });
+    if (!err) {
+        total_open_fd--;
+    }
+    return err;
+}