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-rw-r--r--qemu/hw/9pfs/codir.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/qemu/hw/9pfs/codir.c b/qemu/hw/9pfs/codir.c
new file mode 100644
index 000000000..65ad3298b
--- /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;
+}