[PULL 1/5] tests/9pfs: use g_autofree where possible

[Christian Schoenebeck <qemu_oss@crudebyte.com>]

Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Message-Id: <E1mn1fA-0005qZ-TM@lizzy.crudebyte.com>
---
 tests/qtest/virtio-9p-test.c | 90 +++++++++++-------------------------
 1 file changed, 27 insertions(+), 63 deletions(-)

diff --git a/tests/qtest/virtio-9p-test.c b/tests/qtest/virtio-9p-test.c
index 41fed41de1..502e5ad0c7 100644
--- a/tests/qtest/virtio-9p-test.c
+++ b/tests/qtest/virtio-9p-test.c
@@ -84,7 +84,7 @@ static void pci_config(void *obj, void *data, QGuestAllocator *t_alloc)
     QVirtio9P *v9p = obj;
     alloc = t_alloc;
     size_t tag_len = qvirtio_config_readw(v9p->vdev, 0);
-    char *tag;
+    g_autofree char *tag = NULL;
     int i;
 
     g_assert_cmpint(tag_len, ==, strlen(MOUNT_TAG));
@@ -94,7 +94,6 @@ static void pci_config(void *obj, void *data, QGuestAllocator *t_alloc)
         tag[i] = qvirtio_config_readb(v9p->vdev, i + 2);
     }
     g_assert_cmpmem(tag, tag_len, MOUNT_TAG, tag_len);
-    g_free(tag);
 }
 
 #define P9_MAX_SIZE 4096 /* Max size of a T-message or R-message */
@@ -580,7 +579,7 @@ static void do_version(QVirtio9P *v9p)
 {
     const char *version = "9P2000.L";
     uint16_t server_len;
-    char *server_version;
+    g_autofree char *server_version = NULL;
     P9Req *req;
 
     req = v9fs_tversion(v9p, P9_MAX_SIZE, version, P9_NOTAG);
@@ -588,8 +587,6 @@ static void do_version(QVirtio9P *v9p)
     v9fs_rversion(req, &server_len, &server_version);
 
     g_assert_cmpmem(server_version, server_len, version, strlen(version));
-
-    g_free(server_version);
 }
 
 /* utility function: walk to requested dir and return fid for that dir */
@@ -637,7 +634,7 @@ static void fs_walk(void *obj, void *data, QGuestAllocator *t_alloc)
     alloc = t_alloc;
     char *wnames[P9_MAXWELEM];
     uint16_t nwqid;
-    v9fs_qid *wqid;
+    g_autofree v9fs_qid *wqid = NULL;
     int i;
     P9Req *req;
 
@@ -655,8 +652,6 @@ static void fs_walk(void *obj, void *data, QGuestAllocator *t_alloc)
     for (i = 0; i < P9_MAXWELEM; i++) {
         g_free(wnames[i]);
     }
-
-    g_free(wqid);
 }
 
 static bool fs_dirents_contain_name(struct V9fsDirent *e, const char* name)
@@ -872,9 +867,9 @@ static void fs_readdir(void *obj, void *data, QGuestAllocator *t_alloc)
     g_assert_cmpint(fs_dirents_contain_name(entries, "."), ==, true);
     g_assert_cmpint(fs_dirents_contain_name(entries, ".."), ==, true);
     for (int i = 0; i < QTEST_V9FS_SYNTH_READDIR_NFILES; ++i) {
-        char *name = g_strdup_printf(QTEST_V9FS_SYNTH_READDIR_FILE, i);
+        g_autofree char *name =
+            g_strdup_printf(QTEST_V9FS_SYNTH_READDIR_FILE, i);
         g_assert_cmpint(fs_dirents_contain_name(entries, name), ==, true);
-        g_free(name);
     }
 
     v9fs_free_dirents(entries);
@@ -984,7 +979,8 @@ static void fs_walk_dotdot(void *obj, void *data, QGuestAllocator *t_alloc)
     QVirtio9P *v9p = obj;
     alloc = t_alloc;
     char *const wnames[] = { g_strdup("..") };
-    v9fs_qid root_qid, *wqid;
+    v9fs_qid root_qid;
+    g_autofree v9fs_qid *wqid = NULL;
     P9Req *req;
 
     do_version(v9p);
@@ -998,7 +994,6 @@ static void fs_walk_dotdot(void *obj, void *data, QGuestAllocator *t_alloc)
 
     g_assert_cmpmem(&root_qid, 13, wqid[0], 13);
 
-    g_free(wqid);
     g_free(wnames[0]);
 }
 
@@ -1027,7 +1022,7 @@ static void fs_write(void *obj, void *data, QGuestAllocator *t_alloc)
     alloc = t_alloc;
     static const uint32_t write_count = P9_MAX_SIZE / 2;
     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_WRITE_FILE) };
-    char *buf = g_malloc0(write_count);
+    g_autofree char *buf = g_malloc0(write_count);
     uint32_t count;
     P9Req *req;
 
@@ -1045,7 +1040,6 @@ static void fs_write(void *obj, void *data, QGuestAllocator *t_alloc)
     v9fs_rwrite(req, &count);
     g_assert_cmpint(count, ==, write_count);
 
-    g_free(buf);
     g_free(wnames[0]);
 }
 
@@ -1125,7 +1119,7 @@ static void fs_flush_ignored(void *obj, void *data, QGuestAllocator *t_alloc)
 
 static void do_mkdir(QVirtio9P *v9p, const char *path, const char *cname)
 {
-    char *const name = g_strdup(cname);
+    g_autofree char *name = g_strdup(cname);
     uint32_t fid;
     P9Req *req;
 
@@ -1134,15 +1128,13 @@ static void do_mkdir(QVirtio9P *v9p, const char *path, const char *cname)
     req = v9fs_tmkdir(v9p, fid, name, 0750, 0, 0);
     v9fs_req_wait_for_reply(req, NULL);
     v9fs_rmkdir(req, NULL);
-
-    g_free(name);
 }
 
 /* create a regular file with Tlcreate and return file's fid */
 static uint32_t do_lcreate(QVirtio9P *v9p, const char *path,
                            const char *cname)
 {
-    char *const name = g_strdup(cname);
+    g_autofree char *name = g_strdup(cname);
     uint32_t fid;
     P9Req *req;
 
@@ -1152,7 +1144,6 @@ static uint32_t do_lcreate(QVirtio9P *v9p, const char *path,
     v9fs_req_wait_for_reply(req, NULL);
     v9fs_rlcreate(req, NULL, NULL);
 
-    g_free(name);
     return fid;
 }
 
@@ -1160,8 +1151,8 @@ static uint32_t do_lcreate(QVirtio9P *v9p, const char *path,
 static void do_symlink(QVirtio9P *v9p, const char *path, const char *clink,
                        const char *to)
 {
-    char *const name = g_strdup(clink);
-    char *const dst = g_strdup(to);
+    g_autofree char *name = g_strdup(clink);
+    g_autofree char *dst = g_strdup(to);
     uint32_t fid;
     P9Req *req;
 
@@ -1170,9 +1161,6 @@ static void do_symlink(QVirtio9P *v9p, const char *path, const char *clink,
     req = v9fs_tsymlink(v9p, fid, name, dst, 0, 0);
     v9fs_req_wait_for_reply(req, NULL);
     v9fs_rsymlink(req, NULL);
-
-    g_free(dst);
-    g_free(name);
 }
 
 /* create a hard link named @a clink in directory @a path pointing to @a to */
@@ -1193,7 +1181,7 @@ static void do_hardlink(QVirtio9P *v9p, const char *path, const char *clink,
 static void do_unlinkat(QVirtio9P *v9p, const char *atpath, const char *rpath,
                         uint32_t flags)
 {
-    char *const name = g_strdup(rpath);
+    g_autofree char *name = g_strdup(rpath);
     uint32_t fid;
     P9Req *req;
 
@@ -1202,8 +1190,6 @@ static void do_unlinkat(QVirtio9P *v9p, const char *atpath, const char *rpath,
     req = v9fs_tunlinkat(v9p, fid, name, flags, 0);
     v9fs_req_wait_for_reply(req, NULL);
     v9fs_runlinkat(req);
-
-    g_free(name);
 }
 
 static void fs_readdir_split_128(void *obj, void *data,
@@ -1235,8 +1221,8 @@ static void fs_create_dir(void *obj, void *data, QGuestAllocator *t_alloc)
     QVirtio9P *v9p = obj;
     alloc = t_alloc;
     struct stat st;
-    char *root_path = virtio_9p_test_path("");
-    char *new_dir = virtio_9p_test_path("01");
+    g_autofree char *root_path = virtio_9p_test_path("");
+    g_autofree char *new_dir = virtio_9p_test_path("01");
 
     g_assert(root_path != NULL);
 
@@ -1247,9 +1233,6 @@ static void fs_create_dir(void *obj, void *data, QGuestAllocator *t_alloc)
     g_assert(stat(new_dir, &st) == 0);
     /* ... and is actually a directory */
     g_assert((st.st_mode & S_IFMT) == S_IFDIR);
-
-    g_free(new_dir);
-    g_free(root_path);
 }
 
 static void fs_unlinkat_dir(void *obj, void *data, QGuestAllocator *t_alloc)
@@ -1257,8 +1240,8 @@ static void fs_unlinkat_dir(void *obj, void *data, QGuestAllocator *t_alloc)
     QVirtio9P *v9p = obj;
     alloc = t_alloc;
     struct stat st;
-    char *root_path = virtio_9p_test_path("");
-    char *new_dir = virtio_9p_test_path("02");
+    g_autofree char *root_path = virtio_9p_test_path("");
+    g_autofree char *new_dir = virtio_9p_test_path("02");
 
     g_assert(root_path != NULL);
 
@@ -1273,9 +1256,6 @@ static void fs_unlinkat_dir(void *obj, void *data, QGuestAllocator *t_alloc)
     do_unlinkat(v9p, "/", "02", AT_REMOVEDIR);
     /* directory should be gone now */
     g_assert(stat(new_dir, &st) != 0);
-
-    g_free(new_dir);
-    g_free(root_path);
 }
 
 static void fs_create_file(void *obj, void *data, QGuestAllocator *t_alloc)
@@ -1283,7 +1263,7 @@ static void fs_create_file(void *obj, void *data, QGuestAllocator *t_alloc)
     QVirtio9P *v9p = obj;
     alloc = t_alloc;
     struct stat st;
-    char *new_file = virtio_9p_test_path("03/1st_file");
+    g_autofree char *new_file = virtio_9p_test_path("03/1st_file");
 
     do_attach(v9p);
     do_mkdir(v9p, "/", "03");
@@ -1293,8 +1273,6 @@ static void fs_create_file(void *obj, void *data, QGuestAllocator *t_alloc)
     g_assert(stat(new_file, &st) == 0);
     /* ... and is a regular file */
     g_assert((st.st_mode & S_IFMT) == S_IFREG);
-
-    g_free(new_file);
 }
 
 static void fs_unlinkat_file(void *obj, void *data, QGuestAllocator *t_alloc)
@@ -1302,7 +1280,7 @@ static void fs_unlinkat_file(void *obj, void *data, QGuestAllocator *t_alloc)
     QVirtio9P *v9p = obj;
     alloc = t_alloc;
     struct stat st;
-    char *new_file = virtio_9p_test_path("04/doa_file");
+    g_autofree char *new_file = virtio_9p_test_path("04/doa_file");
 
     do_attach(v9p);
     do_mkdir(v9p, "/", "04");
@@ -1316,8 +1294,6 @@ static void fs_unlinkat_file(void *obj, void *data, QGuestAllocator *t_alloc)
     do_unlinkat(v9p, "04", "doa_file", 0);
     /* file should be gone now */
     g_assert(stat(new_file, &st) != 0);
-
-    g_free(new_file);
 }
 
 static void fs_symlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
@@ -1325,8 +1301,8 @@ static void fs_symlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
     QVirtio9P *v9p = obj;
     alloc = t_alloc;
     struct stat st;
-    char *real_file = virtio_9p_test_path("05/real_file");
-    char *symlink_file = virtio_9p_test_path("05/symlink_file");
+    g_autofree char *real_file = virtio_9p_test_path("05/real_file");
+    g_autofree char *symlink_file = virtio_9p_test_path("05/symlink_file");
 
     do_attach(v9p);
     do_mkdir(v9p, "/", "05");
@@ -1338,9 +1314,6 @@ static void fs_symlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
 
     /* check if created link exists now */
     g_assert(stat(symlink_file, &st) == 0);
-
-    g_free(symlink_file);
-    g_free(real_file);
 }
 
 static void fs_unlinkat_symlink(void *obj, void *data,
@@ -1349,8 +1322,8 @@ static void fs_unlinkat_symlink(void *obj, void *data,
     QVirtio9P *v9p = obj;
     alloc = t_alloc;
     struct stat st;
-    char *real_file = virtio_9p_test_path("06/real_file");
-    char *symlink_file = virtio_9p_test_path("06/symlink_file");
+    g_autofree char *real_file = virtio_9p_test_path("06/real_file");
+    g_autofree char *symlink_file = virtio_9p_test_path("06/symlink_file");
 
     do_attach(v9p);
     do_mkdir(v9p, "/", "06");
@@ -1364,9 +1337,6 @@ static void fs_unlinkat_symlink(void *obj, void *data,
     do_unlinkat(v9p, "06", "symlink_file", 0);
     /* symlink should be gone now */
     g_assert(stat(symlink_file, &st) != 0);
-
-    g_free(symlink_file);
-    g_free(real_file);
 }
 
 static void fs_hardlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
@@ -1374,8 +1344,8 @@ static void fs_hardlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
     QVirtio9P *v9p = obj;
     alloc = t_alloc;
     struct stat st_real, st_link;
-    char *real_file = virtio_9p_test_path("07/real_file");
-    char *hardlink_file = virtio_9p_test_path("07/hardlink_file");
+    g_autofree char *real_file = virtio_9p_test_path("07/real_file");
+    g_autofree char *hardlink_file = virtio_9p_test_path("07/hardlink_file");
 
     do_attach(v9p);
     do_mkdir(v9p, "/", "07");
@@ -1391,9 +1361,6 @@ static void fs_hardlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
     g_assert((st_link.st_mode & S_IFMT) == S_IFREG);
     g_assert(st_link.st_dev == st_real.st_dev);
     g_assert(st_link.st_ino == st_real.st_ino);
-
-    g_free(hardlink_file);
-    g_free(real_file);
 }
 
 static void fs_unlinkat_hardlink(void *obj, void *data,
@@ -1402,8 +1369,8 @@ static void fs_unlinkat_hardlink(void *obj, void *data,
     QVirtio9P *v9p = obj;
     alloc = t_alloc;
     struct stat st_real, st_link;
-    char *real_file = virtio_9p_test_path("08/real_file");
-    char *hardlink_file = virtio_9p_test_path("08/hardlink_file");
+    g_autofree char *real_file = virtio_9p_test_path("08/real_file");
+    g_autofree char *hardlink_file = virtio_9p_test_path("08/hardlink_file");
 
     do_attach(v9p);
     do_mkdir(v9p, "/", "08");
@@ -1419,9 +1386,6 @@ static void fs_unlinkat_hardlink(void *obj, void *data,
     g_assert(stat(hardlink_file, &st_link) != 0);
     /* and old file should still exist */
     g_assert(stat(real_file, &st_real) == 0);
-
-    g_free(hardlink_file);
-    g_free(real_file);
 }
 
 static void *assign_9p_local_driver(GString *cmd_line, void *arg)
-- 
2.20.1