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hw/9pfs: Update v9fs_symlink to use coroutines

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Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Venkateswararao Jujjuri 2011-08-09 00:00:01 +05:30 committed by Aneesh Kumar K.V
parent 02ac7a34ff
commit 3fa2a8d1cd
2 changed files with 28 additions and 76 deletions
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92
hw/9pfs/virtio-9p.c
View File

@ -117,18 +117,6 @@ static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode)
return s->ops->chmod(&s->ctx, path->data, &cred);
}
static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp,
const char *oldpath, const char *newpath, gid_t gid)
{
FsCred cred;
cred_init(&cred);
cred.fc_uid = fidp->uid;
cred.fc_gid = gid;
cred.fc_mode = 0777;
return s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
}
static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
{
return s->ops->link(&s->ctx, oldpath->data, newpath->data);
@ -2029,10 +2017,9 @@ static void v9fs_create(void *opaque)
}
fidp->fid_type = P9_FID_DIR;
} else if (perm & P9_STAT_MODE_SYMLINK) {
err = v9fs_do_symlink(pdu->s, fidp, extension.data,
err = v9fs_co_symlink(pdu->s, fidp, extension.data,
fullname.data, -1);
if (err < 0) {
err = -errno;
goto out;
}
} else if (perm & P9_STAT_MODE_LINK) {
@ -2115,69 +2102,46 @@ out:
v9fs_string_free(&fullname);
}
static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err)
{
if (err == 0) {
stat_to_qid(&vs->stbuf, &vs->qid);
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
err = vs->offset;
} else {
err = -errno;
}
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->name);
v9fs_string_free(&vs->symname);
v9fs_string_free(&vs->fullname);
g_free(vs);
}
static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs,
int err)
{
if (err) {
goto out;
}
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
out:
v9fs_post_symlink(s, vs, err);
}
static void v9fs_symlink(void *opaque)
{
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
V9fsString name;
V9fsString symname;
V9fsString fullname;
V9fsFidState *dfidp;
V9fsQID qid;
struct stat stbuf;
int32_t dfid;
V9fsSymlinkState *vs;
int err = 0;
gid_t gid;
size_t offset = 7;
vs = g_malloc(sizeof(*vs));
vs->pdu = pdu;
vs->offset = 7;
v9fs_string_init(&fullname);
pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid);
v9fs_string_init(&vs->fullname);
pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name,
&vs->symname, &gid);
vs->dfidp = lookup_fid(s, dfid);
if (vs->dfidp == NULL) {
dfidp = lookup_fid(pdu->s, dfid);
if (dfidp == NULL) {
err = -EINVAL;
goto out;
}
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data,
vs->name.data);
err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data,
vs->fullname.data, gid);
v9fs_symlink_post_do_symlink(s, vs, err);
return;
v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
err = v9fs_co_symlink(pdu->s, dfidp, symname.data, fullname.data, gid);
if (err < 0) {
goto out;
}
err = v9fs_co_lstat(pdu->s, &fullname, &stbuf);
if (err < 0) {
goto out;
}
stat_to_qid(&stbuf, &qid);
offset += pdu_marshal(pdu, offset, "Q", &qid);
err = offset;
out:
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->name);
v9fs_string_free(&vs->symname);
g_free(vs);
complete_pdu(pdu->s, pdu, err);
v9fs_string_free(&name);
v9fs_string_free(&symname);
v9fs_string_free(&fullname);
}
static void v9fs_flush(void *opaque)

12
hw/9pfs/virtio-9p.h
View File

@ -305,18 +305,6 @@ typedef struct V9fsWstatState
struct stat stbuf;
} V9fsWstatState;
typedef struct V9fsSymlinkState
{
V9fsPDU *pdu;
size_t offset;
V9fsString name;
V9fsString symname;
V9fsString fullname;
V9fsFidState *dfidp;
V9fsQID qid;
struct stat stbuf;
} V9fsSymlinkState;
typedef struct V9fsIattr
{
int32_t valid;