qemu/hw/9pfs/coxattr.c
Christian Schoenebeck 6f56908427 9pfs: add link to 9p developer docs
To lower the entry level for new developers, add a link to the 9p
developer docs (i.e. qemu wiki) to MAINTAINERS and to the beginning of
9p source files, that is to: https://wiki.qemu.org/Documentation/9p

Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Acked-by: Greg Kurz <groug@kaod.org>
Message-Id: <E1leeDf-0008GZ-9q@lizzy.crudebyte.com>
2021-07-05 13:03:16 +02:00

115 lines
2.8 KiB
C

/*
* 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.
*
*/
/*
* Not so fast! You might want to read the 9p developer docs first:
* https://wiki.qemu.org/Documentation/9p
*/
#include "qemu/osdep.h"
#include "fsdev/qemu-fsdev.h"
#include "qemu/thread.h"
#include "qemu/coroutine.h"
#include "qemu/main-loop.h"
#include "coth.h"
int coroutine_fn v9fs_co_llistxattr(V9fsPDU *pdu, V9fsPath *path, void *value,
size_t size)
{
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->llistxattr(&s->ctx, path, value, size);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int coroutine_fn v9fs_co_lgetxattr(V9fsPDU *pdu, V9fsPath *path,
V9fsString *xattr_name, void *value,
size_t size)
{
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->lgetxattr(&s->ctx, path,
xattr_name->data,
value, size);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int coroutine_fn v9fs_co_lsetxattr(V9fsPDU *pdu, V9fsPath *path,
V9fsString *xattr_name, void *value,
size_t size, int flags)
{
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->lsetxattr(&s->ctx, path,
xattr_name->data, value,
size, flags);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int coroutine_fn v9fs_co_lremovexattr(V9fsPDU *pdu, V9fsPath *path,
V9fsString *xattr_name)
{
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->lremovexattr(&s->ctx, path, xattr_name->data);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}