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hw/9pfs: Update v9fs_xattrwalk to coroutines 

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Aneesh Kumar K.V 2011-05-18 16:05:48 -07:00
parent 1ceffa546a
commit 670185a641
1 changed files with 63 additions and 135 deletions
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198
hw/9pfs/virtio-9p.c
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@ -239,21 +239,6 @@ static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf)
return s->ops->statfs(&s->ctx, path->data, stbuf);
}
static ssize_t v9fs_do_lgetxattr(V9fsState *s, V9fsString *path,
V9fsString *xattr_name,
void *value, size_t size)
{
return s->ops->lgetxattr(&s->ctx, path->data,
xattr_name->data, value, size);
}
static ssize_t v9fs_do_llistxattr(V9fsState *s, V9fsString *path,
void *value, size_t size)
{
return s->ops->llistxattr(&s->ctx, path->data,
value, size);
}
static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path,
V9fsString *xattr_name,
void *value, size_t size, int flags)
@ -3271,149 +3256,92 @@ out:
qemu_free(vs);
}
static void v9fs_post_xattr_getvalue(V9fsState *s, V9fsXattrState *vs, int err)
{
if (err < 0) {
err = -errno;
free_fid(s, vs->xattr_fidp->fid);
goto out;
}
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
err = vs->offset;
out:
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->name);
qemu_free(vs);
return;
}
static void v9fs_post_xattr_check(V9fsState *s, V9fsXattrState *vs, ssize_t err)
{
if (err < 0) {
err = -errno;
free_fid(s, vs->xattr_fidp->fid);
goto out;
}
/*
* Read the xattr value
*/
vs->xattr_fidp->fs.xattr.len = vs->size;
vs->xattr_fidp->fid_type = P9_FID_XATTR;
vs->xattr_fidp->fs.xattr.copied_len = -1;
if (vs->size) {
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
err = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path,
&vs->name, vs->xattr_fidp->fs.xattr.value,
vs->xattr_fidp->fs.xattr.len);
}
v9fs_post_xattr_getvalue(s, vs, err);
return;
out:
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->name);
qemu_free(vs);
}
static void v9fs_post_lxattr_getvalue(V9fsState *s,
V9fsXattrState *vs, int err)
{
if (err < 0) {
err = -errno;
free_fid(s, vs->xattr_fidp->fid);
goto out;
}
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
err = vs->offset;
out:
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->name);
qemu_free(vs);
return;
}
static void v9fs_post_lxattr_check(V9fsState *s,
V9fsXattrState *vs, ssize_t err)
{
if (err < 0) {
err = -errno;
free_fid(s, vs->xattr_fidp->fid);
goto out;
}
/*
* Read the xattr value
*/
vs->xattr_fidp->fs.xattr.len = vs->size;
vs->xattr_fidp->fid_type = P9_FID_XATTR;
vs->xattr_fidp->fs.xattr.copied_len = -1;
if (vs->size) {
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
err = v9fs_do_llistxattr(s, &vs->xattr_fidp->path,
vs->xattr_fidp->fs.xattr.value,
vs->xattr_fidp->fs.xattr.len);
}
v9fs_post_lxattr_getvalue(s, vs, err);
return;
out:
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->name);
qemu_free(vs);
}
static void v9fs_xattrwalk(void *opaque)
{
int64_t size;
V9fsString name;
ssize_t err = 0;
size_t offset = 7;
int32_t fid, newfid;
V9fsFidState *file_fidp;
V9fsFidState *xattr_fidp;
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
ssize_t err = 0;
V9fsXattrState *vs;
int32_t fid, newfid;
vs = qemu_malloc(sizeof(*vs));
vs->pdu = pdu;
vs->offset = 7;
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &newfid, &vs->name);
vs->file_fidp = lookup_fid(s, fid);
if (vs->file_fidp == NULL) {
pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name);
file_fidp = lookup_fid(s, fid);
if (file_fidp == NULL) {
err = -ENOENT;
goto out;
}
vs->xattr_fidp = alloc_fid(s, newfid);
if (vs->xattr_fidp == NULL) {
xattr_fidp = alloc_fid(s, newfid);
if (xattr_fidp == NULL) {
err = -EINVAL;
goto out;
}
v9fs_string_copy(&vs->xattr_fidp->path, &vs->file_fidp->path);
if (vs->name.data[0] == 0) {
v9fs_string_copy(&xattr_fidp->path, &file_fidp->path);
if (name.data[0] == 0) {
/*
* listxattr request. Get the size first
*/
vs->size = v9fs_do_llistxattr(s, &vs->xattr_fidp->path,
NULL, 0);
if (vs->size < 0) {
err = vs->size;
size = v9fs_co_llistxattr(s, &xattr_fidp->path, NULL, 0);
if (size < 0) {
err = size;
free_fid(s, xattr_fidp->fid);
goto out;
}
v9fs_post_lxattr_check(s, vs, err);
return;
/*
* Read the xattr value
*/
xattr_fidp->fs.xattr.len = size;
xattr_fidp->fid_type = P9_FID_XATTR;
xattr_fidp->fs.xattr.copied_len = -1;
if (size) {
xattr_fidp->fs.xattr.value = qemu_malloc(size);
err = v9fs_co_llistxattr(s, &xattr_fidp->path,
xattr_fidp->fs.xattr.value,
xattr_fidp->fs.xattr.len);
if (err < 0) {
free_fid(s, xattr_fidp->fid);
goto out;
}
}
offset += pdu_marshal(pdu, offset, "q", size);
err = offset;
} else {
/*
* specific xattr fid. We check for xattr
* presence also collect the xattr size
*/
vs->size = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path,
&vs->name, NULL, 0);
if (vs->size < 0) {
err = vs->size;
size = v9fs_co_lgetxattr(s, &xattr_fidp->path,
&name, NULL, 0);
if (size < 0) {
err = size;
free_fid(s, xattr_fidp->fid);
goto out;
}
v9fs_post_xattr_check(s, vs, err);
return;
/*
* Read the xattr value
*/
xattr_fidp->fs.xattr.len = size;
xattr_fidp->fid_type = P9_FID_XATTR;
xattr_fidp->fs.xattr.copied_len = -1;
if (size) {
xattr_fidp->fs.xattr.value = qemu_malloc(size);
err = v9fs_co_lgetxattr(s, &xattr_fidp->path,
&name, xattr_fidp->fs.xattr.value,
xattr_fidp->fs.xattr.len);
if (err < 0) {
free_fid(s, xattr_fidp->fid);
goto out;
}
}
offset += pdu_marshal(pdu, offset, "q", size);
err = offset;
}
out:
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->name);
qemu_free(vs);
complete_pdu(s, pdu, err);
v9fs_string_free(&name);
}
static void v9fs_xattrcreate(void *opaque)