[Qemu-devel] [PATCH -v2 21/22] virtio-9p: Remove unnecessary definition of fid

["Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>]

We already have fid as a part of V9fsFidState so use that instead
of defining another variable

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
---
 hw/virtio-9p.c |   62 ++++++++++++++++++++++++++-----------------------------
 1 files changed, 29 insertions(+), 33 deletions(-)

diff --git a/hw/virtio-9p.c b/hw/virtio-9p.c
index 3ce26ca..c8ab6b6 100644
--- a/hw/virtio-9p.c
+++ b/hw/virtio-9p.c
@@ -770,7 +770,6 @@ out:
 typedef struct V9fsStatState {
     V9fsPDU *pdu;
     size_t offset;
-    int32_t fid;
     V9fsStat v9stat;
     V9fsFidState *fidp;
     struct stat stbuf;
@@ -798,6 +797,7 @@ out:
 
 static void v9fs_stat(V9fsState *s, V9fsPDU *pdu)
 {
+    int32_t fid;
     V9fsStatState *vs;
     ssize_t err = 0;
 
@@ -807,9 +807,9 @@ static void v9fs_stat(V9fsState *s, V9fsPDU *pdu)
 
     memset(&vs->v9stat, 0, sizeof(vs->v9stat));
 
-    pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
+    pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
 
-    vs->fidp = lookup_fid(s, vs->fid);
+    vs->fidp = lookup_fid(s, fid);
     if (vs->fidp == NULL) {
 	    err = -ENOENT;
         goto out;
@@ -828,8 +828,6 @@ out:
 typedef struct V9fsWalkState {
     V9fsPDU *pdu;
     size_t offset;
-    int32_t fid;
-    int32_t newfid;
     int16_t nwnames;
     int name_idx;
     V9fsQID *qids;
@@ -867,7 +865,7 @@ static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs,
                                                                 int err)
 {
     if (err == -1) {
-        free_fid(s, vs->newfid);
+        free_fid(s, vs->newfidp->fid);
         v9fs_string_free(&vs->path);
         err = -ENOENT;
         goto out;
@@ -924,6 +922,7 @@ out:
 
 static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
 {
+    int32_t fid, newfid;
     V9fsWalkState *vs;
     int err = 0;
     int i;
@@ -934,8 +933,8 @@ static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
     vs->qids = NULL;
     vs->offset = 7;
 
-    vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &vs->fid,
-                                            &vs->newfid, &vs->nwnames);
+    vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
+                                            &newfid, &vs->nwnames);
 
     if(vs->nwnames) {
         vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames);
@@ -948,14 +947,14 @@ static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
         }
     }
 
-    vs->fidp = lookup_fid(s, vs->fid);
+    vs->fidp = lookup_fid(s, fid);
     if (vs->fidp == NULL) {
         err = -ENOENT;
         goto out;
     }
 
     /* FIXME: is this really valid? */
-    if (vs->fid == vs->newfid) {
+    if (fid == newfid) {
         v9fs_string_init(&vs->path);
         vs->name_idx = 0;
 
@@ -969,7 +968,7 @@ static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
             return;
         }
     } else {
-        vs->newfidp = alloc_fid(s, vs->newfid);
+        vs->newfidp = alloc_fid(s, newfid);
         if (vs->newfidp == NULL) {
             err = -EINVAL;
             goto out;
@@ -1000,7 +999,6 @@ out:
 typedef struct V9fsOpenState {
     V9fsPDU *pdu;
     size_t offset;
-    int32_t fid;
     int8_t mode;
     V9fsFidState *fidp;
     V9fsQID qid;
@@ -1105,7 +1103,7 @@ out:
 
 static void v9fs_open(V9fsState *s, V9fsPDU *pdu)
 {
-
+    int32_t fid;
     V9fsOpenState *vs;
     ssize_t err = 0;
 
@@ -1114,9 +1112,9 @@ static void v9fs_open(V9fsState *s, V9fsPDU *pdu)
     vs->pdu = pdu;
     vs->offset = 7;
 
-    pdu_unmarshal(vs->pdu, vs->offset, "db", &vs->fid, &vs->mode);
+    pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
 
-    vs->fidp = lookup_fid(s, vs->fid);
+    vs->fidp = lookup_fid(s, fid);
     if (vs->fidp == NULL) {
         err = -ENOENT;
         goto out;
@@ -1183,7 +1181,6 @@ static void print_sg(struct iovec *sg, int cnt)
 typedef struct V9fsReadState {
     V9fsPDU *pdu;
     size_t offset;
-    int32_t fid;
     int32_t count;
     int32_t total;
     int64_t off;
@@ -1346,6 +1343,7 @@ out:
 
 static void v9fs_read(V9fsState *s, V9fsPDU *pdu)
 {
+    int32_t fid;
     V9fsReadState *vs;
     ssize_t err = 0;
 
@@ -1356,9 +1354,9 @@ static void v9fs_read(V9fsState *s, V9fsPDU *pdu)
     vs->len = 0;
     vs->count = 0;
 
-    pdu_unmarshal(vs->pdu, vs->offset, "dqd", &vs->fid, &vs->off, &vs->count);
+    pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
 
-    vs->fidp = lookup_fid(s, vs->fid);
+    vs->fidp = lookup_fid(s, fid);
     if (vs->fidp == NULL) {
         err = -EINVAL;
         goto out;
@@ -1407,7 +1405,6 @@ out:
 typedef struct V9fsWriteState {
     V9fsPDU *pdu;
     size_t offset;
-    int32_t fid;
     int32_t len;
     int32_t count;
     int32_t total;
@@ -1476,6 +1473,7 @@ out:
 
 static void v9fs_write(V9fsState *s, V9fsPDU *pdu)
 {
+    int32_t fid;
     V9fsWriteState *vs;
     ssize_t err;
 
@@ -1487,10 +1485,10 @@ static void v9fs_write(V9fsState *s, V9fsPDU *pdu)
     vs->total = 0;
     vs->len = 0;
 
-    pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &vs->fid, &vs->off, &vs->count,
+    pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
                     vs->sg, &vs->cnt);
 
-    vs->fidp = lookup_fid(s, vs->fid);
+    vs->fidp = lookup_fid(s, fid);
     if (vs->fidp == NULL) {
         err = -EINVAL;
         goto out;
@@ -1514,7 +1512,6 @@ out:
 typedef struct V9fsCreateState {
     V9fsPDU *pdu;
     size_t offset;
-    int32_t fid;
     V9fsFidState *fidp;
     V9fsQID qid;
     int32_t perm;
@@ -1652,12 +1649,10 @@ static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
     } else if (vs->perm & P9_STAT_MODE_LINK) {
         int32_t nfid = atoi(vs->extension.data);
         V9fsFidState *nfidp = lookup_fid(s, nfid);
-
         if (nfidp == NULL) {
             err = -errno;
             v9fs_post_create(s, vs, err);
         }
-
         err = posix_link(s, &nfidp->path, &vs->fullname);
         v9fs_create_post_perms(s, vs, err);
     } else if (vs->perm & P9_STAT_MODE_DEVICE) {
@@ -1707,6 +1702,7 @@ out:
 
 static void v9fs_create(V9fsState *s, V9fsPDU *pdu)
 {
+    int32_t fid;
     V9fsCreateState *vs;
     int err = 0;
 
@@ -1716,10 +1712,10 @@ static void v9fs_create(V9fsState *s, V9fsPDU *pdu)
 
     v9fs_string_init(&vs->fullname);
 
-    pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &vs->fid, &vs->name,
+    pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
                                 &vs->perm, &vs->mode, &vs->extension);
 
-    vs->fidp = lookup_fid(s, vs->fid);
+    vs->fidp = lookup_fid(s, fid);
     if (vs->fidp == NULL) {
         err = -EINVAL;
         goto out;
@@ -1749,7 +1745,6 @@ static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
 typedef struct V9fsRemoveState {
     V9fsPDU *pdu;
     size_t offset;
-    int32_t fid;
     V9fsFidState *fidp;
 } V9fsRemoveState;
 
@@ -1761,7 +1756,7 @@ static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs,
         goto out;
     }
 
-    err = free_fid(s, vs->fid);
+    err = free_fid(s, vs->fidp->fid);
     if (err < 0)
         goto out;
 
@@ -1773,6 +1768,7 @@ out:
 
 static void v9fs_remove(V9fsState *s, V9fsPDU *pdu)
 {
+    int32_t fid;
     V9fsRemoveState *vs;
     int err = 0;
 
@@ -1780,9 +1776,9 @@ static void v9fs_remove(V9fsState *s, V9fsPDU *pdu)
     vs->pdu = pdu;
     vs->offset = 7;
 
-    pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
+    pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
 
-    vs->fidp = lookup_fid(s, vs->fid);
+    vs->fidp = lookup_fid(s, fid);
     if (vs->fidp == NULL) {
         err = -EINVAL;
         goto out;
@@ -1837,7 +1833,6 @@ typedef struct V9fsWstatState
 {
     V9fsPDU *pdu;
     size_t offset;
-    int32_t fid;
     int16_t unused;
     V9fsStat v9stat;
     V9fsFidState *fidp;
@@ -2002,6 +1997,7 @@ static int donttouch_stat(V9fsStat *stat)
 
 static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu)
 {
+    int32_t fid;
     V9fsWstatState *vs;
     int err = 0;
 
@@ -2009,9 +2005,9 @@ static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu)
     vs->pdu = pdu;
     vs->offset = 7;
 
-    pdu_unmarshal(pdu, vs->offset, "dwS", &vs->fid, &vs->unused, &vs->v9stat);
+    pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
 
-    vs->fidp = lookup_fid(s, vs->fid);
+    vs->fidp = lookup_fid(s, fid);
     if (vs->fidp == NULL) {
         err = -EINVAL;
         goto out;
-- 
1.7.0.2.273.gc2413