hw/9pfs: Update v9fs_wstat to use coroutines

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Aneesh Kumar K.V 2011-05-08 13:06:04 +05:30
parent d7a9049119
commit b81d685e21
2 changed files with 65 additions and 213 deletions

View file

@ -103,40 +103,6 @@ static int v9fs_do_preadv(V9fsState *s, int fd, const struct iovec *iov,
return s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset);
}
static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode)
{
FsCred cred;
cred_init(&cred);
cred.fc_mode = mode;
return s->ops->chmod(&s->ctx, path->data, &cred);
}
static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size)
{
return s->ops->truncate(&s->ctx, path->data, size);
}
static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid)
{
FsCred cred;
cred_init(&cred);
cred.fc_uid = uid;
cred.fc_gid = gid;
return s->ops->chown(&s->ctx, path->data, &cred);
}
static int v9fs_do_utimensat(V9fsState *s, V9fsString *path,
const struct timespec times[2])
{
return s->ops->utimensat(&s->ctx, path->data, times);
}
static int v9fs_do_fsync(V9fsState *s, int fd, int datasync)
{
return s->ops->fsync(&s->ctx, fd, datasync);
}
static void v9fs_string_init(V9fsString *str)
{
str->data = NULL;
@ -2181,39 +2147,6 @@ out:
complete_pdu(pdu->s, pdu, err);
}
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err)
{
if (err < 0) {
goto out;
}
err = vs->offset;
out:
v9fs_stat_free(&vs->v9stat);
complete_pdu(s, vs->pdu, err);
g_free(vs);
}
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err)
{
if (err < 0) {
goto out;
}
if (vs->v9stat.length != -1) {
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) {
err = -errno;
}
}
v9fs_wstat_post_truncate(s, vs, err);
return;
out:
v9fs_stat_free(&vs->v9stat);
complete_pdu(s, vs->pdu, err);
g_free(vs);
}
static int v9fs_complete_rename(V9fsState *s, V9fsFidState *fidp,
int32_t newdirfid, V9fsString *name)
{
@ -2282,24 +2215,6 @@ out:
return err;
}
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err)
{
if (err < 0) {
goto out;
}
if (vs->v9stat.name.size != 0) {
err = v9fs_complete_rename(s, vs->fidp, -1, &vs->v9stat.name);
}
v9fs_wstat_post_rename(s, vs, err);
return;
out:
v9fs_stat_free(&vs->v9stat);
complete_pdu(s, vs->pdu, err);
g_free(vs);
}
static void v9fs_rename(void *opaque)
{
int32_t fid;
@ -2329,143 +2244,90 @@ out:
v9fs_string_free(&name);
}
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err)
static void v9fs_wstat(void *opaque)
{
if (err < 0) {
int32_t fid;
int err = 0;
int16_t unused;
V9fsStat v9stat;
size_t offset = 7;
struct stat stbuf;
V9fsFidState *fidp;
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat);
fidp = lookup_fid(s, fid);
if (fidp == NULL) {
err = -EINVAL;
goto out;
}
if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) {
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
vs->v9stat.n_gid)) {
err = -errno;
/* do we need to sync the file? */
if (donttouch_stat(&v9stat)) {
err = v9fs_co_fsync(s, fidp, 0);
goto out;
}
if (v9stat.mode != -1) {
uint32_t v9_mode;
err = v9fs_co_lstat(s, &fidp->path, &stbuf);
if (err < 0) {
goto out;
}
v9_mode = stat_to_v9mode(&stbuf);
if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
(v9_mode & P9_STAT_MODE_TYPE_BITS)) {
/* Attempting to change the type */
err = -EIO;
goto out;
}
err = v9fs_co_chmod(s, &fidp->path,
v9mode_to_mode(v9stat.mode,
&v9stat.extension));
if (err < 0) {
goto out;
}
}
v9fs_wstat_post_chown(s, vs, err);
return;
out:
v9fs_stat_free(&vs->v9stat);
complete_pdu(s, vs->pdu, err);
g_free(vs);
}
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err)
{
if (err < 0) {
goto out;
}
if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) {
if (v9stat.mtime != -1 || v9stat.atime != -1) {
struct timespec times[2];
if (vs->v9stat.atime != -1) {
times[0].tv_sec = vs->v9stat.atime;
if (v9stat.atime != -1) {
times[0].tv_sec = v9stat.atime;
times[0].tv_nsec = 0;
} else {
times[0].tv_nsec = UTIME_OMIT;
}
if (vs->v9stat.mtime != -1) {
times[1].tv_sec = vs->v9stat.mtime;
if (v9stat.mtime != -1) {
times[1].tv_sec = v9stat.mtime;
times[1].tv_nsec = 0;
} else {
times[1].tv_nsec = UTIME_OMIT;
}
if (v9fs_do_utimensat(s, &vs->fidp->path, times)) {
err = -errno;
err = v9fs_co_utimensat(s, &fidp->path, times);
if (err < 0) {
goto out;
}
}
v9fs_wstat_post_utime(s, vs, err);
return;
out:
v9fs_stat_free(&vs->v9stat);
complete_pdu(s, vs->pdu, err);
g_free(vs);
}
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err)
{
if (err == -1) {
err = -errno;
}
v9fs_stat_free(&vs->v9stat);
complete_pdu(s, vs->pdu, err);
g_free(vs);
}
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err)
{
uint32_t v9_mode;
if (err == -1) {
err = -errno;
goto out;
}
v9_mode = stat_to_v9mode(&vs->stbuf);
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
(v9_mode & P9_STAT_MODE_TYPE_BITS)) {
/* Attempting to change the type */
err = -EIO;
if (v9stat.n_gid != -1 || v9stat.n_uid != -1) {
err = v9fs_co_chown(s, &fidp->path, v9stat.n_uid, v9stat.n_gid);
if (err < 0) {
goto out;
}
}
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
&vs->v9stat.extension))) {
err = -errno;
}
v9fs_wstat_post_chmod(s, vs, err);
return;
if (v9stat.name.size != 0) {
err = v9fs_complete_rename(s, fidp, -1, &v9stat.name);
if (err < 0) {
goto out;
}
}
if (v9stat.length != -1) {
err = v9fs_co_truncate(s, &fidp->path, v9stat.length);
if (err < 0) {
goto out;
}
}
err = offset;
out:
v9fs_stat_free(&vs->v9stat);
complete_pdu(s, vs->pdu, err);
g_free(vs);
}
static void v9fs_wstat(void *opaque)
{
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
int32_t fid;
V9fsWstatState *vs;
int err = 0;
vs = g_malloc(sizeof(*vs));
vs->pdu = pdu;
vs->offset = 7;
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
vs->fidp = lookup_fid(s, fid);
if (vs->fidp == NULL) {
err = -EINVAL;
goto out;
}
/* do we need to sync the file? */
if (donttouch_stat(&vs->v9stat)) {
err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0);
v9fs_wstat_post_fsync(s, vs, err);
return;
}
if (vs->v9stat.mode != -1) {
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
v9fs_wstat_post_lstat(s, vs, err);
return;
}
v9fs_wstat_post_chmod(s, vs, err);
return;
out:
v9fs_stat_free(&vs->v9stat);
complete_pdu(s, vs->pdu, err);
g_free(vs);
v9fs_stat_free(&v9stat);
complete_pdu(s, pdu, err);
}
static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf)

View file

@ -295,16 +295,6 @@ typedef struct V9fsWriteState {
int cnt;
} V9fsWriteState;
typedef struct V9fsWstatState
{
V9fsPDU *pdu;
size_t offset;
int16_t unused;
V9fsStat v9stat;
V9fsFidState *fidp;
struct stat stbuf;
} V9fsWstatState;
typedef struct V9fsIattr
{
int32_t valid;