hw/9pfs: Add yield support for readdir related coroutines
This include readdir, telldir, seekdir, rewinddir. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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@ -305,7 +305,7 @@ hw-obj-$(CONFIG_SOUND) += $(sound-obj-y)
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9pfs-nested-$(CONFIG_VIRTFS) = virtio-9p.o virtio-9p-debug.o
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9pfs-nested-$(CONFIG_VIRTFS) = virtio-9p.o virtio-9p-debug.o
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9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-local.o virtio-9p-xattr.o
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9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-local.o virtio-9p-xattr.o
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9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-xattr-user.o virtio-9p-posix-acl.o
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9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-xattr-user.o virtio-9p-posix-acl.o
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9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-coth.o cofs.o
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9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-coth.o cofs.o codir.o
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hw-obj-$(CONFIG_REALLY_VIRTFS) += $(addprefix 9pfs/, $(9pfs-nested-y))
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hw-obj-$(CONFIG_REALLY_VIRTFS) += $(addprefix 9pfs/, $(9pfs-nested-y))
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$(addprefix 9pfs/, $(9pfs-nested-y)): QEMU_CFLAGS+=$(GLIB_CFLAGS)
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$(addprefix 9pfs/, $(9pfs-nested-y)): QEMU_CFLAGS+=$(GLIB_CFLAGS)
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@ -0,0 +1,66 @@
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/*
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* Virtio 9p backend
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "fsdev/qemu-fsdev.h"
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#include "qemu-thread.h"
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#include "qemu-coroutine.h"
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#include "virtio-9p-coth.h"
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int v9fs_co_readdir(V9fsState *s, V9fsFidState *fidp, struct dirent **dent)
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{
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int err;
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v9fs_co_run_in_worker(
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{
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errno = 0;
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/*FIXME!! need to switch to readdir_r */
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*dent = s->ops->readdir(&s->ctx, fidp->fs.dir);
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if (!*dent && errno) {
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err = -errno;
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} else {
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err = 0;
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}
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});
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return err;
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}
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off_t v9fs_co_telldir(V9fsState *s, V9fsFidState *fidp)
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{
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off_t err;
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v9fs_co_run_in_worker(
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{
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err = s->ops->telldir(&s->ctx, fidp->fs.dir);
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if (err < 0) {
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err = -errno;
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}
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});
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return err;
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}
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void v9fs_co_seekdir(V9fsState *s, V9fsFidState *fidp, off_t offset)
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{
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v9fs_co_run_in_worker(
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{
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s->ops->seekdir(&s->ctx, fidp->fs.dir, offset);
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});
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}
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void v9fs_co_rewinddir(V9fsState *s, V9fsFidState *fidp)
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{
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v9fs_co_run_in_worker(
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{
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s->ops->rewinddir(&s->ctx, fidp->fs.dir);
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});
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}
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@ -57,4 +57,9 @@ typedef struct V9fsThPool {
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extern void co_run_in_worker_bh(void *);
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extern void co_run_in_worker_bh(void *);
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extern int v9fs_init_worker_threads(void);
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extern int v9fs_init_worker_threads(void);
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extern int v9fs_co_readlink(V9fsState *, V9fsString *, V9fsString *);
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extern int v9fs_co_readlink(V9fsState *, V9fsString *, V9fsString *);
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extern int v9fs_co_readdir(V9fsState *, V9fsFidState *,
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struct dirent **);
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extern off_t v9fs_co_telldir(V9fsState *, V9fsFidState *);
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extern void v9fs_co_seekdir(V9fsState *, V9fsFidState *, off_t);
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extern void v9fs_co_rewinddir(V9fsState *, V9fsFidState *);
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#endif
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#endif
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