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tests/9p: merge *walk*() functions

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Introduce declarative function calls.

There are currently 4 different functions for sending a 9p 'Twalk'
request: v9fs_twalk(), do_walk(), do_walk_rqids() and
do_walk_expect_error(). They are all doing the same thing, just in a
slightly different way and with slightly different function arguments.

Merge those 4 functions into a single function by using a struct for
function call arguments and use designated initializers when calling
this function to turn usage into a declarative approach, which is
better readable and easier to maintain.

Also move private functions genfid(), split() and split_free() from
virtio-9p-test.c to virtio-9p-client.c.

Based-on: <E1odrya-0004Fv-97@lizzy.crudebyte.com>
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <607969dbfbc63c1be008df9131133711b046e979.1664917004.git.qemu_oss@crudebyte.com>
This commit is contained in:
Christian Schoenebeck 2022-10-04 22:53:23 +02:00
parent f5265c8f91
commit 569f3b63ad
3 changed files with 198 additions and 140 deletions
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114
tests/qtest/libqos/virtio-9p-client.c
View file

@ -23,6 +23,65 @@ void v9fs_set_allocator(QGuestAllocator *t_alloc)
alloc = t_alloc;
}
/*
* Used to auto generate new fids. Start with arbitrary high value to avoid
* collision with hard coded fids in basic test code.
*/
static uint32_t fid_generator = 1000;
static uint32_t genfid(void)
{
return fid_generator++;
}
/**
* Splits the @a in string by @a delim into individual (non empty) strings
* and outputs them to @a out. The output array @a out is NULL terminated.
*
* Output array @a out must be freed by calling split_free().
*
* @returns number of individual elements in output array @a out (without the
* final NULL terminating element)
*/
static int split(const char *in, const char *delim, char ***out)
{
int n = 0, i = 0;
char *tmp, *p;
tmp = g_strdup(in);
for (p = strtok(tmp, delim); p != NULL; p = strtok(NULL, delim)) {
if (strlen(p) > 0) {
++n;
}
}
g_free(tmp);
*out = g_new0(char *, n + 1); /* last element NULL delimiter */
tmp = g_strdup(in);
for (p = strtok(tmp, delim); p != NULL; p = strtok(NULL, delim)) {
if (strlen(p) > 0) {
(*out)[i++] = g_strdup(p);
}
}
g_free(tmp);
return n;
}
static void split_free(char ***out)
{
int i;
if (!*out) {
return;
}
for (i = 0; (*out)[i]; ++i) {
g_free((*out)[i]);
}
g_free(*out);
*out = NULL;
}
void v9fs_memwrite(P9Req *req, const void *addr, size_t len)
{
qtest_memwrite(req->qts, req->t_msg + req->t_off, addr, len);
@ -294,28 +353,61 @@ void v9fs_rattach(P9Req *req, v9fs_qid *qid)
}
/* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
P9Req *v9fs_twalk(QVirtio9P *v9p, uint32_t fid, uint32_t newfid,
uint16_t nwname, char *const wnames[], uint16_t tag)
TWalkRes v9fs_twalk(TWalkOpt opt)
{
P9Req *req;
int i;
uint32_t body_size = 4 + 4 + 2;
uint32_t err;
char **wnames = NULL;
for (i = 0; i < nwname; i++) {
uint16_t wname_size = v9fs_string_size(wnames[i]);
g_assert(opt.client);
/* expecting either high- or low-level path, both not both */
g_assert(!opt.path || !(opt.nwname || opt.wnames));
/* expecting either Rwalk or Rlerror, but obviously not both */
g_assert(!opt.expectErr || !(opt.rwalk.nwqid || opt.rwalk.wqid));
if (!opt.newfid) {
opt.newfid = genfid();
}
if (opt.path) {
opt.nwname = split(opt.path, "/", &wnames);
opt.wnames = wnames;
}
for (i = 0; i < opt.nwname; i++) {
uint16_t wname_size = v9fs_string_size(opt.wnames[i]);
g_assert_cmpint(body_size, <=, UINT32_MAX - wname_size);
body_size += wname_size;
}
req = v9fs_req_init(v9p, body_size, P9_TWALK, tag);
v9fs_uint32_write(req, fid);
v9fs_uint32_write(req, newfid);
v9fs_uint16_write(req, nwname);
for (i = 0; i < nwname; i++) {
v9fs_string_write(req, wnames[i]);
req = v9fs_req_init(opt.client, body_size, P9_TWALK, opt.tag);
v9fs_uint32_write(req, opt.fid);
v9fs_uint32_write(req, opt.newfid);
v9fs_uint16_write(req, opt.nwname);
for (i = 0; i < opt.nwname; i++) {
v9fs_string_write(req, opt.wnames[i]);
}
v9fs_req_send(req);
return req;
if (!opt.requestOnly) {
v9fs_req_wait_for_reply(req, NULL);
if (opt.expectErr) {
v9fs_rlerror(req, &err);
g_assert_cmpint(err, ==, opt.expectErr);
} else {
v9fs_rwalk(req, opt.rwalk.nwqid, opt.rwalk.wqid);
}
req = NULL; /* request was freed */
}
split_free(&wnames);
return (TWalkRes) {
.newfid = opt.newfid,
.req = req,
};
}
/* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */

37
tests/qtest/libqos/virtio-9p-client.h
View file

@ -72,6 +72,40 @@ struct V9fsDirent {
struct V9fsDirent *next;
};
/* options for 'Twalk' 9p request */
typedef struct TWalkOpt {
/* 9P client being used (mandatory) */
QVirtio9P *client;
/* user supplied tag number being returned with response (optional) */
uint16_t tag;
/* file ID of directory from where walk should start (optional) */
uint32_t fid;
/* file ID for target directory being walked to (optional) */
uint32_t newfid;
/* low level variant of path to walk to (optional) */
uint16_t nwname;
char **wnames;
/* high level variant of path to walk to (optional) */
const char *path;
/* data being received from 9p server as 'Rwalk' response (optional) */
struct {
uint16_t *nwqid;
v9fs_qid **wqid;
} rwalk;
/* only send Twalk request but not wait for a reply? (optional) */
bool requestOnly;
/* do we expect an Rlerror response, if yes which error code? (optional) */
uint32_t expectErr;
} TWalkOpt;
/* result of 'Twalk' 9p request */
typedef struct TWalkRes {
/* file ID of target directory been walked to */
uint32_t newfid;
/* if requestOnly was set: request object for further processing */
P9Req *req;
} TWalkRes;
void v9fs_set_allocator(QGuestAllocator *t_alloc);
void v9fs_memwrite(P9Req *req, const void *addr, size_t len);
void v9fs_memskip(P9Req *req, size_t len);
@ -99,8 +133,7 @@ void v9fs_rversion(P9Req *req, uint16_t *len, char **version);
P9Req *v9fs_tattach(QVirtio9P *v9p, uint32_t fid, uint32_t n_uname,
uint16_t tag);
void v9fs_rattach(P9Req *req, v9fs_qid *qid);
P9Req *v9fs_twalk(QVirtio9P *v9p, uint32_t fid, uint32_t newfid,
uint16_t nwname, char *const wnames[], uint16_t tag);
TWalkRes v9fs_twalk(TWalkOpt opt);
void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid);
P9Req *v9fs_tgetattr(QVirtio9P *v9p, uint32_t fid, uint64_t request_mask,
uint16_t tag);

187
tests/qtest/virtio-9p-test.c
View file

@ -16,61 +16,7 @@
#include "qemu/module.h"
#include "libqos/virtio-9p-client.h"
/*
* Used to auto generate new fids. Start with arbitrary high value to avoid
* collision with hard coded fids in basic test code.
*/
static uint32_t fid_generator = 1000;
static uint32_t genfid(void)
{
return fid_generator++;
}
/**
* Splits the @a in string by @a delim into individual (non empty) strings
* and outputs them to @a out. The output array @a out is NULL terminated.
*
* Output array @a out must be freed by calling split_free().
*
* @returns number of individual elements in output array @a out (without the
* final NULL terminating element)
*/
static int split(const char *in, const char *delim, char ***out)
{
int n = 0, i = 0;
char *tmp, *p;
tmp = g_strdup(in);
for (p = strtok(tmp, delim); p != NULL; p = strtok(NULL, delim)) {
if (strlen(p) > 0) {
++n;
}
}
g_free(tmp);
*out = g_new0(char *, n + 1); /* last element NULL delimiter */
tmp = g_strdup(in);
for (p = strtok(tmp, delim); p != NULL; p = strtok(NULL, delim)) {
if (strlen(p) > 0) {
(*out)[i++] = g_strdup(p);
}
}
g_free(tmp);
return n;
}
static void split_free(char ***out)
{
int i;
for (i = 0; (*out)[i]; ++i) {
g_free((*out)[i]);
}
g_free(*out);
*out = NULL;
}
#define twalk(...) v9fs_twalk((TWalkOpt) __VA_ARGS__)
static void pci_config(void *obj, void *data, QGuestAllocator *t_alloc)
{
@ -109,52 +55,6 @@ static void do_version(QVirtio9P *v9p)
g_assert_cmpmem(server_version, server_len, version, strlen(version));
}
/*
* utility function: walk to requested dir and return fid for that dir and
* the QIDs of server response
*/
static uint32_t do_walk_rqids(QVirtio9P *v9p, const char *path, uint16_t *nwqid,
v9fs_qid **wqid)
{
char **wnames;
P9Req *req;
const uint32_t fid = genfid();
int nwnames = split(path, "/", &wnames);
req = v9fs_twalk(v9p, 0, fid, nwnames, wnames, 0);
v9fs_req_wait_for_reply(req, NULL);
v9fs_rwalk(req, nwqid, wqid);
split_free(&wnames);
return fid;
}
/* utility function: walk to requested dir and return fid for that dir */
static uint32_t do_walk(QVirtio9P *v9p, const char *path)
{
return do_walk_rqids(v9p, path, NULL, NULL);
}
/* utility function: walk to requested dir and expect passed error response */
static void do_walk_expect_error(QVirtio9P *v9p, const char *path, uint32_t err)
{
char **wnames;
P9Req *req;
uint32_t _err;
const uint32_t fid = genfid();
int nwnames = split(path, "/", &wnames);
req = v9fs_twalk(v9p, 0, fid, nwnames, wnames, 0);
v9fs_req_wait_for_reply(req, NULL);
v9fs_rlerror(req, &_err);
g_assert_cmpint(_err, ==, err);
split_free(&wnames);
}
static void fs_version(void *obj, void *data, QGuestAllocator *t_alloc)
{
v9fs_set_allocator(t_alloc);
@ -197,7 +97,10 @@ static void fs_walk(void *obj, void *data, QGuestAllocator *t_alloc)
}
do_attach(v9p);
req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames, 0);
req = twalk({
.client = v9p, .fid = 0, .newfid = 1,
.nwname = P9_MAXWELEM, .wnames = wnames, .requestOnly = true
}).req;
v9fs_req_wait_for_reply(req, NULL);
v9fs_rwalk(req, &nwqid, &wqid);
@ -223,7 +126,7 @@ static void fs_readdir(void *obj, void *data, QGuestAllocator *t_alloc)
{
QVirtio9P *v9p = obj;
v9fs_set_allocator(t_alloc);
char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
char *wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
uint16_t nqid;
v9fs_qid qid;
uint32_t count, nentries;
@ -231,7 +134,10 @@ static void fs_readdir(void *obj, void *data, QGuestAllocator *t_alloc)
P9Req *req;
do_attach(v9p);
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
req = twalk({
.client = v9p, .fid = 0, .newfid = 1,
.nwname = 1, .wnames = wnames, .requestOnly = true
}).req;
v9fs_req_wait_for_reply(req, NULL);
v9fs_rwalk(req, &nqid, NULL);
g_assert_cmpint(nqid, ==, 1);
@ -275,7 +181,7 @@ static void fs_readdir(void *obj, void *data, QGuestAllocator *t_alloc)
/* readdir test where overall request is split over several messages */
static void do_readdir_split(QVirtio9P *v9p, uint32_t count)
{
char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
char *wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
uint16_t nqid;
v9fs_qid qid;
uint32_t nentries, npartialentries;
@ -292,7 +198,10 @@ static void do_readdir_split(QVirtio9P *v9p, uint32_t count)
nentries = 0;
tail = NULL;
req = v9fs_twalk(v9p, 0, fid, 1, wnames, 0);
req = twalk({
.client = v9p, .fid = 0, .newfid = fid,
.nwname = 1, .wnames = wnames, .requestOnly = true
}).req;
v9fs_req_wait_for_reply(req, NULL);
v9fs_rwalk(req, &nqid, NULL);
g_assert_cmpint(nqid, ==, 1);
@ -356,12 +265,15 @@ static void fs_walk_no_slash(void *obj, void *data, QGuestAllocator *t_alloc)
{
QVirtio9P *v9p = obj;
v9fs_set_allocator(t_alloc);
char *const wnames[] = { g_strdup(" /") };
char *wnames[] = { g_strdup(" /") };
P9Req *req;
uint32_t err;
do_attach(v9p);
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
req = twalk({
.client = v9p, .fid = 0, .newfid = 1, .nwname = 1, .wnames = wnames,
.requestOnly = true
}).req;
v9fs_req_wait_for_reply(req, NULL);
v9fs_rlerror(req, &err);
@ -380,7 +292,7 @@ static void fs_walk_nonexistent(void *obj, void *data, QGuestAllocator *t_alloc)
* The 9p2000 protocol spec says: "If the first element cannot be walked
* for any reason, Rerror is returned."
*/
do_walk_expect_error(v9p, "non-existent", ENOENT);
twalk({ .client = v9p, .path = "non-existent", .expectErr = ENOENT });
}
static void fs_walk_2nd_nonexistent(void *obj, void *data,
@ -398,7 +310,10 @@ static void fs_walk_2nd_nonexistent(void *obj, void *data,
);
do_attach_rqid(v9p, &root_qid);
fid = do_walk_rqids(v9p, path, &nwqid, &wqid);
fid = twalk({
.client = v9p, .path = path,
.rwalk.nwqid = &nwqid, .rwalk.wqid = &wqid
}).newfid;
/*
* The 9p2000 protocol spec says: "nwqid is therefore either nwname or the
* index of the first elementwise walk that failed."
@ -430,7 +345,10 @@ static void fs_walk_none(void *obj, void *data, QGuestAllocator *t_alloc)
v9fs_req_wait_for_reply(req, NULL);
v9fs_rattach(req, &root_qid);
req = v9fs_twalk(v9p, 0, 1, 0, NULL, 0);
req = twalk({
.client = v9p, .fid = 0, .newfid = 1, .nwname = 0, .wnames = NULL,
.requestOnly = true
}).req;
v9fs_req_wait_for_reply(req, NULL);
v9fs_rwalk(req, NULL, &wqid);
@ -448,7 +366,7 @@ static void fs_walk_dotdot(void *obj, void *data, QGuestAllocator *t_alloc)
{
QVirtio9P *v9p = obj;
v9fs_set_allocator(t_alloc);
char *const wnames[] = { g_strdup("..") };
char *wnames[] = { g_strdup("..") };
v9fs_qid root_qid;
g_autofree v9fs_qid *wqid = NULL;
P9Req *req;
@ -458,7 +376,10 @@ static void fs_walk_dotdot(void *obj, void *data, QGuestAllocator *t_alloc)
v9fs_req_wait_for_reply(req, NULL);
v9fs_rattach(req, &root_qid);
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
req = twalk({
.client = v9p, .fid = 0, .newfid = 1, .nwname = 1, .wnames = wnames,
.requestOnly = true
}).req;
v9fs_req_wait_for_reply(req, NULL);
v9fs_rwalk(req, NULL, &wqid); /* We now we'll get one qid */
@ -471,11 +392,14 @@ static void fs_lopen(void *obj, void *data, QGuestAllocator *t_alloc)
{
QVirtio9P *v9p = obj;
v9fs_set_allocator(t_alloc);
char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_LOPEN_FILE) };
char *wnames[] = { g_strdup(QTEST_V9FS_SYNTH_LOPEN_FILE) };
P9Req *req;
do_attach(v9p);
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
req = twalk({
.client = v9p, .fid = 0, .newfid = 1, .nwname = 1, .wnames = wnames,
.requestOnly = true
}).req;
v9fs_req_wait_for_reply(req, NULL);
v9fs_rwalk(req, NULL, NULL);
@ -491,13 +415,16 @@ static void fs_write(void *obj, void *data, QGuestAllocator *t_alloc)
QVirtio9P *v9p = obj;
v9fs_set_allocator(t_alloc);
static const uint32_t write_count = P9_MAX_SIZE / 2;
char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_WRITE_FILE) };
char *wnames[] = { g_strdup(QTEST_V9FS_SYNTH_WRITE_FILE) };
g_autofree char *buf = g_malloc0(write_count);
uint32_t count;
P9Req *req;
do_attach(v9p);
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
req = twalk({
.client = v9p, .fid = 0, .newfid = 1, .nwname = 1, .wnames = wnames,
.requestOnly = true
}).req;
v9fs_req_wait_for_reply(req, NULL);
v9fs_rwalk(req, NULL, NULL);
@ -517,13 +444,16 @@ static void fs_flush_success(void *obj, void *data, QGuestAllocator *t_alloc)
{
QVirtio9P *v9p = obj;
v9fs_set_allocator(t_alloc);
char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
char *wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
P9Req *req, *flush_req;
uint32_t reply_len;
uint8_t should_block;
do_attach(v9p);
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
req = twalk({
.client = v9p, .fid = 0, .newfid = 1, .nwname = 1, .wnames = wnames,
.requestOnly = true
}).req;
v9fs_req_wait_for_reply(req, NULL);
v9fs_rwalk(req, NULL, NULL);
@ -554,13 +484,16 @@ static void fs_flush_ignored(void *obj, void *data, QGuestAllocator *t_alloc)
{
QVirtio9P *v9p = obj;
v9fs_set_allocator(t_alloc);
char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
char *wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
P9Req *req, *flush_req;
uint32_t count;
uint8_t should_block;
do_attach(v9p);
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
req = twalk({
.client = v9p, .fid = 0, .newfid = 1, .nwname = 1, .wnames = wnames,
.requestOnly = true
}).req;
v9fs_req_wait_for_reply(req, NULL);
v9fs_rwalk(req, NULL, NULL);
@ -593,7 +526,7 @@ static void do_mkdir(QVirtio9P *v9p, const char *path, const char *cname)
uint32_t fid;
P9Req *req;
fid = do_walk(v9p, path);
fid = twalk({ .client = v9p, .path = path }).newfid;
req = v9fs_tmkdir(v9p, fid, name, 0750, 0, 0);
v9fs_req_wait_for_reply(req, NULL);
@ -608,7 +541,7 @@ static uint32_t do_lcreate(QVirtio9P *v9p, const char *path,
uint32_t fid;
P9Req *req;
fid = do_walk(v9p, path);
fid = twalk({ .client = v9p, .path = path }).newfid;
req = v9fs_tlcreate(v9p, fid, name, 0, 0750, 0, 0);
v9fs_req_wait_for_reply(req, NULL);
@ -626,7 +559,7 @@ static void do_symlink(QVirtio9P *v9p, const char *path, const char *clink,
uint32_t fid;
P9Req *req;
fid = do_walk(v9p, path);
fid = twalk({ .client = v9p, .path = path }).newfid;
req = v9fs_tsymlink(v9p, fid, name, dst, 0, 0);
v9fs_req_wait_for_reply(req, NULL);
@ -640,8 +573,8 @@ static void do_hardlink(QVirtio9P *v9p, const char *path, const char *clink,
uint32_t dfid, fid;
P9Req *req;
dfid = do_walk(v9p, path);
fid = do_walk(v9p, to);
dfid = twalk({ .client = v9p, .path = path }).newfid;
fid = twalk({ .client = v9p, .path = to }).newfid;
req = v9fs_tlink(v9p, dfid, fid, clink, 0);
v9fs_req_wait_for_reply(req, NULL);
@ -655,7 +588,7 @@ static void do_unlinkat(QVirtio9P *v9p, const char *atpath, const char *rpath,
uint32_t fid;
P9Req *req;
fid = do_walk(v9p, atpath);
fid = twalk({ .client = v9p, .path = atpath }).newfid;
req = v9fs_tunlinkat(v9p, fid, name, flags, 0);
v9fs_req_wait_for_reply(req, NULL);