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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2011-05-07 19:41:55 +0530
committerAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2011-08-22 09:23:22 +0530
commit3cc19c0c607ca780c79dbf42b4781d110a64e342 (patch)
treefb04b1e01bb9e4d67ec4da5346bd536781315232 /hw/9pfs
parentd8e0c29e407284f90c6cfb25fb03733347618eec (diff)
hw/9pfs: Update v9fs_walk to use coroutines
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Diffstat (limited to 'hw/9pfs')
-rw-r--r--hw/9pfs/virtio-9p.c206
-rw-r--r--hw/9pfs/virtio-9p.h13
2 files changed, 68 insertions, 151 deletions
diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index 911d019e36..766821be44 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -1327,171 +1327,101 @@ out:
complete_pdu(s, pdu, err);
}
-static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err)
-{
- complete_pdu(s, vs->pdu, err);
-
- if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) {
- for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) {
- v9fs_string_free(&vs->wnames[vs->name_idx]);
- }
-
- g_free(vs->wnames);
- g_free(vs->qids);
- }
-}
-
-static void v9fs_walk_marshal(V9fsWalkState *vs)
+static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids)
{
int i;
- vs->offset = 7;
- vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
-
- for (i = 0; i < vs->nwnames; i++) {
- vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
- }
-}
-
-static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs,
- int err)
-{
- if (err == -1) {
- free_fid(s, vs->newfidp->fid);
- v9fs_string_free(&vs->path);
- err = -ENOENT;
- goto out;
- }
-
- stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
-
- vs->name_idx++;
- if (vs->name_idx < vs->nwnames) {
- v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
- vs->wnames[vs->name_idx].data);
- v9fs_string_copy(&vs->newfidp->path, &vs->path);
-
- err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
- v9fs_walk_post_newfid_lstat(s, vs, err);
- return;
- }
-
- v9fs_string_free(&vs->path);
- v9fs_walk_marshal(vs);
- err = vs->offset;
-out:
- v9fs_walk_complete(s, vs, err);
-}
-
-static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs,
- int err)
-{
- if (err == -1) {
- v9fs_string_free(&vs->path);
- err = -ENOENT;
- goto out;
- }
-
- stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
- vs->name_idx++;
- if (vs->name_idx < vs->nwnames) {
-
- v9fs_string_sprintf(&vs->path, "%s/%s",
- vs->fidp->path.data, vs->wnames[vs->name_idx].data);
- v9fs_string_copy(&vs->fidp->path, &vs->path);
-
- err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
- v9fs_walk_post_oldfid_lstat(s, vs, err);
- return;
+ size_t offset = 7;
+ offset += pdu_marshal(pdu, offset, "w", nwnames);
+ for (i = 0; i < nwnames; i++) {
+ offset += pdu_marshal(pdu, offset, "Q", &qids[i]);
}
-
- v9fs_string_free(&vs->path);
- v9fs_walk_marshal(vs);
- err = vs->offset;
-out:
- v9fs_walk_complete(s, vs, err);
+ return offset;
}
static void v9fs_walk(void *opaque)
{
+ int name_idx;
+ V9fsQID *qids = NULL;
+ int i, err = 0;
+ V9fsString path;
+ uint16_t nwnames;
+ struct stat stbuf;
+ size_t offset = 7;
+ int32_t fid, newfid;
+ V9fsString *wnames = NULL;
+ V9fsFidState *fidp;
+ V9fsFidState *newfidp;
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
- int32_t fid, newfid;
- V9fsWalkState *vs;
- int err = 0;
- int i;
- vs = g_malloc(sizeof(*vs));
- vs->pdu = pdu;
- vs->wnames = NULL;
- vs->qids = NULL;
- vs->offset = 7;
-
- vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
- &newfid, &vs->nwnames);
-
- if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) {
- vs->wnames = g_malloc0(sizeof(vs->wnames[0]) * vs->nwnames);
+ offset += pdu_unmarshal(pdu, offset, "ddw", &fid,
+ &newfid, &nwnames);
- vs->qids = g_malloc0(sizeof(vs->qids[0]) * vs->nwnames);
-
- for (i = 0; i < vs->nwnames; i++) {
- vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
- &vs->wnames[i]);
+ if (nwnames && nwnames <= P9_MAXWELEM) {
+ wnames = g_malloc0(sizeof(wnames[0]) * nwnames);
+ qids = g_malloc0(sizeof(qids[0]) * nwnames);
+ for (i = 0; i < nwnames; i++) {
+ offset += pdu_unmarshal(pdu, offset, "s", &wnames[i]);
}
- } else if (vs->nwnames > P9_MAXWELEM) {
+
+ } else if (nwnames > P9_MAXWELEM) {
err = -EINVAL;
goto out;
}
-
- vs->fidp = lookup_fid(s, fid);
- if (vs->fidp == NULL) {
+ fidp = lookup_fid(s, fid);
+ if (fidp == NULL) {
err = -ENOENT;
goto out;
}
-
- /* FIXME: is this really valid? */
if (fid == newfid) {
-
- BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
- v9fs_string_init(&vs->path);
- vs->name_idx = 0;
-
- if (vs->name_idx < vs->nwnames) {
- v9fs_string_sprintf(&vs->path, "%s/%s",
- vs->fidp->path.data, vs->wnames[vs->name_idx].data);
- v9fs_string_copy(&vs->fidp->path, &vs->path);
-
- err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
- v9fs_walk_post_oldfid_lstat(s, vs, err);
- return;
+ BUG_ON(fidp->fid_type != P9_FID_NONE);
+ v9fs_string_init(&path);
+ for (name_idx = 0; name_idx < nwnames; name_idx++) {
+ v9fs_string_sprintf(&path, "%s/%s",
+ fidp->path.data, wnames[name_idx].data);
+ v9fs_string_copy(&fidp->path, &path);
+
+ err = v9fs_co_lstat(s, &fidp->path, &stbuf);
+ if (err < 0) {
+ v9fs_string_free(&path);
+ goto out;
+ }
+ stat_to_qid(&stbuf, &qids[name_idx]);
}
+ v9fs_string_free(&path);
} else {
- vs->newfidp = alloc_fid(s, newfid);
- if (vs->newfidp == NULL) {
+ newfidp = alloc_fid(s, newfid);
+ if (newfidp == NULL) {
err = -EINVAL;
goto out;
}
-
- vs->newfidp->uid = vs->fidp->uid;
- v9fs_string_init(&vs->path);
- vs->name_idx = 0;
- v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path);
-
- if (vs->name_idx < vs->nwnames) {
- v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
- vs->wnames[vs->name_idx].data);
- v9fs_string_copy(&vs->newfidp->path, &vs->path);
-
- err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
- v9fs_walk_post_newfid_lstat(s, vs, err);
- return;
+ newfidp->uid = fidp->uid;
+ v9fs_string_init(&path);
+ v9fs_string_copy(&newfidp->path, &fidp->path);
+ for (name_idx = 0; name_idx < nwnames; name_idx++) {
+ v9fs_string_sprintf(&path, "%s/%s", newfidp->path.data,
+ wnames[name_idx].data);
+ v9fs_string_copy(&newfidp->path, &path);
+ err = v9fs_co_lstat(s, &newfidp->path, &stbuf);
+ if (err < 0) {
+ free_fid(s, newfidp->fid);
+ v9fs_string_free(&path);
+ goto out;
+ }
+ stat_to_qid(&stbuf, &qids[name_idx]);
}
+ v9fs_string_free(&path);
}
-
- v9fs_walk_marshal(vs);
- err = vs->offset;
+ err = v9fs_walk_marshal(pdu, nwnames, qids);
out:
- v9fs_walk_complete(s, vs, err);
+ complete_pdu(s, pdu, err);
+ if (nwnames && nwnames <= P9_MAXWELEM) {
+ for (name_idx = 0; name_idx < nwnames; name_idx++) {
+ v9fs_string_free(&wnames[name_idx]);
+ }
+ g_free(wnames);
+ g_free(qids);
+ }
}
static int32_t get_iounit(V9fsState *s, V9fsString *name)
diff --git a/hw/9pfs/virtio-9p.h b/hw/9pfs/virtio-9p.h
index 97ceb7228a..3b585f0984 100644
--- a/hw/9pfs/virtio-9p.h
+++ b/hw/9pfs/virtio-9p.h
@@ -267,19 +267,6 @@ typedef struct V9fsStatDotl {
uint64_t st_data_version;
} V9fsStatDotl;
-typedef struct V9fsWalkState {
- V9fsPDU *pdu;
- size_t offset;
- uint16_t nwnames;
- int name_idx;
- V9fsQID *qids;
- V9fsFidState *fidp;
- V9fsFidState *newfidp;
- V9fsString path;
- V9fsString *wnames;
- struct stat stbuf;
-} V9fsWalkState;
-
typedef struct V9fsOpenState {
V9fsPDU *pdu;
size_t offset;