hw/9pfs: Update v9fs_lcreate to use coroutines

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 2011-08-08 23:54:08 +05:30 committed by Aneesh Kumar K.V
parent e4de423214
commit 36f8981f01
2 changed files with 38 additions and 102 deletions

View File

@ -149,19 +149,6 @@ static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf)
return s->ops->fstat(&s->ctx, fd, stbuf);
}
static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid,
int flags, int mode)
{
FsCred cred;
cred_init(&cred);
cred.fc_uid = uid;
cred.fc_gid = gid;
cred.fc_mode = mode & 07777;
return s->ops->open2(&s->ctx, fullname, flags, &cred);
}
static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp,
const char *oldpath, const char *newpath, gid_t gid)
{
@ -1607,96 +1594,57 @@ out:
complete_pdu(s, pdu, err);
}
static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err)
{
if (err == 0) {
v9fs_string_copy(&vs->fidp->path, &vs->fullname);
stat_to_qid(&vs->stbuf, &vs->qid);
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid,
vs->iounit);
err = vs->offset;
} else {
vs->fidp->fid_type = P9_FID_NONE;
err = -errno;
if (vs->fidp->fs.fd > 0) {
close(vs->fidp->fs.fd);
}
}
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->name);
v9fs_string_free(&vs->fullname);
g_free(vs);
}
static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs,
int err)
{
if (err) {
err = -errno;
goto out;
}
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
out:
v9fs_post_lcreate(s, vs, err);
}
static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs,
int err)
{
if (vs->fidp->fs.fd == -1) {
err = -errno;
goto out;
}
vs->fidp->fid_type = P9_FID_FILE;
vs->iounit = get_iounit(s, &vs->fullname);
v9fs_lcreate_post_get_iounit(s, vs, err);
return;
out:
v9fs_post_lcreate(s, vs, err);
}
static void v9fs_lcreate(void *opaque)
{
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
int32_t dfid, flags, mode;
gid_t gid;
V9fsLcreateState *vs;
ssize_t err = 0;
ssize_t offset = 7;
V9fsString fullname;
V9fsString name;
V9fsFidState *fidp;
struct stat stbuf;
V9fsQID qid;
int32_t iounit;
V9fsPDU *pdu = opaque;
vs = g_malloc(sizeof(*vs));
vs->pdu = pdu;
vs->offset = 7;
v9fs_string_init(&fullname);
pdu_unmarshal(pdu, offset, "dsddd", &dfid, &name, &flags,
&mode, &gid);
v9fs_string_init(&vs->fullname);
pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags,
&mode, &gid);
vs->fidp = lookup_fid(s, dfid);
if (vs->fidp == NULL) {
fidp = lookup_fid(pdu->s, dfid);
if (fidp == NULL) {
err = -ENOENT;
goto out;
}
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
vs->name.data);
v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
/* Ignore direct disk access hint until the server supports it. */
flags &= ~O_DIRECT;
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
gid, flags, mode);
v9fs_lcreate_post_do_open2(s, vs, err);
return;
err = v9fs_co_open2(pdu->s, fidp, fullname.data, gid, flags, mode);
if (err < 0) {
goto out;
}
fidp->fid_type = P9_FID_FILE;
iounit = get_iounit(pdu->s, &fullname);
err = v9fs_co_lstat(pdu->s, &fullname, &stbuf);
if (err < 0) {
fidp->fid_type = P9_FID_NONE;
if (fidp->fs.fd > 0) {
close(fidp->fs.fd);
}
goto out;
}
v9fs_string_copy(&fidp->path, &fullname);
stat_to_qid(&stbuf, &qid);
offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit);
err = offset;
out:
complete_pdu(s, vs->pdu, err);
v9fs_string_free(&vs->name);
g_free(vs);
complete_pdu(pdu->s, pdu, err);
v9fs_string_free(&name);
v9fs_string_free(&fullname);
}
static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err)
@ -2273,8 +2221,7 @@ static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err)
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err)
{
if (vs->fidp->fs.fd == -1) {
err = -errno;
if (err < 0) {
goto out;
}
vs->fidp->fid_type = P9_FID_FILE;
@ -2349,8 +2296,8 @@ static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
0, vs->fidp->uid, -1);
v9fs_post_create(s, vs, err);
} else {
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
-1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
err = v9fs_co_open2(s, vs->fidp, vs->fullname.data, -1,
omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
v9fs_create_post_open2(s, vs, err);
}

View File

@ -236,17 +236,6 @@ typedef struct V9fsCreateState {
int iounit;
} V9fsCreateState;
typedef struct V9fsLcreateState {
V9fsPDU *pdu;
size_t offset;
V9fsFidState *fidp;
V9fsQID qid;
int32_t iounit;
struct stat stbuf;
V9fsString name;
V9fsString fullname;
} V9fsLcreateState;
typedef struct V9fsStatState {
V9fsPDU *pdu;
size_t offset;