mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-10-14 23:13:30 +00:00
This series is mostly about 9p request cancellation. It fixes a
long standing bug (read "specification violation") where the server would send an invalid response when the client has cancelled an in-flight request. This was causing annoying spurious EINTR returns in linux. The fix comes with some related testing in QTEST. Other patches are code cleanup and improvements. -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEtIKLr5QxQM7yo0kQcdTV5YIvc9YFAlp0OmMACgkQcdTV5YIv c9bM2w/+ORsH7ifYVoPZDwPdhLAVg8t4aU7ak7kWSOeuTZhE8WA6GL8T4rjnhZZ4 PbFZTye0fOsZZaT30sHUIwI/CGewvdx0kMJuX339XfwaWvsrF/8tHFA8QdreclVf YlLJwD2yZRujWPCU8k5D3hUfH2YD/w68b9Hv7K2hgsPw1Zoq7pLi/B2/BK/62G1d 35nFG97xDmcScSybrIeLwaCIKW/wgjHsWgUgAVMpgaSwtu/JTtEG5JYCZLGO6HVa p67zdVQbCKQcdPLLllcrnGdWlA4CGxCBe+WMQyL3eJ2VDEH6XTBX8DiLstIVlXfj vXb7vjlsYxE6rdeiMXRZWDGK+jZIePmDsI6ILlpyL0rEphuBnjEMljCxyBnOp7gS dMTFmhfP4mApaYxeENlpQ5noDeQ/Jr1c9YeeBh9UnZ7r16/m3f2/sEIh+6QTL7YD iR7ZG5LF0eP5SJKoZNV0i4123A5I7v1ekn5N5q6Kf4PMcY11507lxZksPhckdPgp FPhsJJ1JQzWMcfE1mKeiZXq5Cys4EUhUK6UrOFp6tO38H/3YMuYMAz25D46Xk3Zx qGuptCaov9uPi+5uqKuG3aJ9nMIMW9ZJdMSWo2+kb4EX4hMiOewjOJtaKA11QeS+ YoEr3szKtVnPUKsiqm+lhHL6ec5B8NQB7f8Hl88pkoLBGQzMaWU= =9T0i -----END PGP SIGNATURE----- Merge remote-tracking branch 'remotes/gkurz/tags/for-upstream' into staging This series is mostly about 9p request cancellation. It fixes a long standing bug (read "specification violation") where the server would send an invalid response when the client has cancelled an in-flight request. This was causing annoying spurious EINTR returns in linux. The fix comes with some related testing in QTEST. Other patches are code cleanup and improvements. # gpg: Signature made Fri 02 Feb 2018 10:16:03 GMT # gpg: using RSA key 71D4D5E5822F73D6 # gpg: Good signature from "Greg Kurz <groug@kaod.org>" # gpg: aka "Gregory Kurz <gregory.kurz@free.fr>" # gpg: aka "[jpeg image of size 3330]" # Primary key fingerprint: B482 8BAF 9431 40CE F2A3 4910 71D4 D5E5 822F 73D6 * remotes/gkurz/tags/for-upstream: tests/virtio-9p: explicitly handle potential integer overflows tests: virtio-9p: add FLUSH operation test libqos/virtio: return length written into used descriptor tests: virtio-9p: add WRITE operation test tests: virtio-9p: add LOPEN operation test tests: virtio-9p: use the synth backend tests: virtio-9p: wait for completion in the test code tests: virtio-9p: move request tag to the test functions 9pfs: Correctly handle cancelled requests 9pfs: drop v9fs_register_transport() Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell
commit
f74425e267
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@ -19,6 +19,7 @@
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#include "qemu/rcu.h"
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#include "qemu/rcu_queue.h"
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#include "qemu/cutils.h"
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#include "sysemu/qtest.h"
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/* Root node for synth file system */
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static V9fsSynthNode synth_root = {
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@ -514,6 +515,26 @@ static int synth_unlinkat(FsContext *ctx, V9fsPath *dir,
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return -1;
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}
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static ssize_t v9fs_synth_qtest_write(void *buf, int len, off_t offset,
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void *arg)
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{
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return 1;
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}
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static ssize_t v9fs_synth_qtest_flush_write(void *buf, int len, off_t offset,
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void *arg)
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{
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bool should_block = !!*(uint8_t *)buf;
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if (should_block) {
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/* This will cause the server to call us again until we're cancelled */
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errno = EINTR;
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return -1;
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}
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return 1;
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}
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static int synth_init(FsContext *ctx, Error **errp)
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{
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QLIST_INIT(&synth_root.child);
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@ -527,6 +548,37 @@ static int synth_init(FsContext *ctx, Error **errp)
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/* Mark the subsystem is ready for use */
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synth_fs = 1;
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if (qtest_enabled()) {
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V9fsSynthNode *node = NULL;
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int i, ret;
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/* Directory hierarchy for WALK test */
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for (i = 0; i < P9_MAXWELEM; i++) {
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char *name = g_strdup_printf(QTEST_V9FS_SYNTH_WALK_FILE, i);
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ret = qemu_v9fs_synth_mkdir(node, 0700, name, &node);
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assert(!ret);
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g_free(name);
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}
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/* File for LOPEN test */
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ret = qemu_v9fs_synth_add_file(NULL, 0, QTEST_V9FS_SYNTH_LOPEN_FILE,
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NULL, NULL, ctx);
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assert(!ret);
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/* File for WRITE test */
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ret = qemu_v9fs_synth_add_file(NULL, 0, QTEST_V9FS_SYNTH_WRITE_FILE,
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NULL, v9fs_synth_qtest_write, ctx);
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assert(!ret);
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/* File for FLUSH test */
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ret = qemu_v9fs_synth_add_file(NULL, 0, QTEST_V9FS_SYNTH_FLUSH_FILE,
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NULL, v9fs_synth_qtest_flush_write,
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ctx);
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assert(!ret);
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}
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return 0;
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}
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@ -49,4 +49,17 @@ int qemu_v9fs_synth_add_file(V9fsSynthNode *parent, int mode,
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const char *name, v9fs_synth_read read,
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v9fs_synth_write write, void *arg);
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/* qtest stuff */
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#define QTEST_V9FS_SYNTH_WALK_FILE "WALK%d"
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#define QTEST_V9FS_SYNTH_LOPEN_FILE "LOPEN"
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#define QTEST_V9FS_SYNTH_WRITE_FILE "WRITE"
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/* Any write to the "FLUSH" file is handled one byte at a time by the
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* backend. If the byte is zero, the backend returns success (ie, 1),
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* otherwise it forces the server to try again forever. Thus allowing
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* the client to cancel the request.
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*/
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#define QTEST_V9FS_SYNTH_FLUSH_FILE "FLUSH"
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#endif
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25
hw/9pfs/9p.c
25
hw/9pfs/9p.c
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@ -24,6 +24,7 @@
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#include "coth.h"
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#include "trace.h"
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#include "migration/blocker.h"
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#include "sysemu/qtest.h"
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int open_fd_hw;
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int total_open_fd;
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@ -630,6 +631,24 @@ static void coroutine_fn pdu_complete(V9fsPDU *pdu, ssize_t len)
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V9fsState *s = pdu->s;
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int ret;
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/*
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* The 9p spec requires that successfully cancelled pdus receive no reply.
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* Sending a reply would confuse clients because they would
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* assume that any EINTR is the actual result of the operation,
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* rather than a consequence of the cancellation. However, if
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* the operation completed (succesfully or with an error other
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* than caused be cancellation), we do send out that reply, both
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* for efficiency and to avoid confusing the rest of the state machine
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* that assumes passing a non-error here will mean a successful
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* transmission of the reply.
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*/
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bool discard = pdu->cancelled && len == -EINTR;
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if (discard) {
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trace_v9fs_rcancel(pdu->tag, pdu->id);
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pdu->size = 0;
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goto out_notify;
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}
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if (len < 0) {
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int err = -len;
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len = 7;
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@ -3485,7 +3504,8 @@ void pdu_submit(V9fsPDU *pdu, P9MsgHeader *hdr)
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}
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/* Returns 0 on success, 1 on failure. */
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int v9fs_device_realize_common(V9fsState *s, Error **errp)
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int v9fs_device_realize_common(V9fsState *s, const V9fsTransport *t,
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Error **errp)
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{
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int i, len;
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struct stat stat;
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@ -3493,6 +3513,9 @@ int v9fs_device_realize_common(V9fsState *s, Error **errp)
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V9fsPath path;
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int rc = 1;
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assert(!s->transport);
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s->transport = t;
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/* initialize pdu allocator */
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QLIST_INIT(&s->free_list);
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QLIST_INIT(&s->active_list);
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10
hw/9pfs/9p.h
10
hw/9pfs/9p.h
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@ -346,7 +346,8 @@ void v9fs_path_sprintf(V9fsPath *path, const char *fmt, ...);
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void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs);
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int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath,
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const char *name, V9fsPath *path);
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int v9fs_device_realize_common(V9fsState *s, Error **errp);
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int v9fs_device_realize_common(V9fsState *s, const V9fsTransport *t,
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Error **errp);
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void v9fs_device_unrealize_common(V9fsState *s, Error **errp);
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V9fsPDU *pdu_alloc(V9fsState *s);
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@ -366,11 +367,4 @@ struct V9fsTransport {
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void (*push_and_notify)(V9fsPDU *pdu);
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};
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static inline int v9fs_register_transport(V9fsState *s, const V9fsTransport *t)
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{
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assert(!s->transport);
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s->transport = t;
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return 0;
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}
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#endif
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@ -1,6 +1,7 @@
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# See docs/devel/tracing.txt for syntax documentation.
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# hw/9pfs/virtio-9p.c
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v9fs_rcancel(uint16_t tag, uint8_t id) "tag %d id %d"
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v9fs_rerror(uint16_t tag, uint8_t id, int err) "tag %d id %d err %d"
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v9fs_version(uint16_t tag, uint8_t id, int32_t msize, char* version) "tag %d id %d msize %d version %s"
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v9fs_version_return(uint16_t tag, uint8_t id, int32_t msize, char* version) "tag %d id %d msize %d version %s"
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@ -198,17 +198,13 @@ static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
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V9fsVirtioState *v = VIRTIO_9P(dev);
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V9fsState *s = &v->state;
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if (v9fs_device_realize_common(s, errp)) {
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goto out;
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if (v9fs_device_realize_common(s, &virtio_9p_transport, errp)) {
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return;
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}
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v->config_size = sizeof(struct virtio_9p_config) + strlen(s->fsconf.tag);
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virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, v->config_size);
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v->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);
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v9fs_register_transport(s, &virtio_9p_transport);
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out:
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return;
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}
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static void virtio_9p_device_unrealize(DeviceState *dev, Error **errp)
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|
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@ -446,7 +446,6 @@ static int xen_9pfs_connect(struct XenDevice *xendev)
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xen_9pdev->id = s->fsconf.fsdev_id =
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g_strdup_printf("xen9p%d", xendev->dev);
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xen_9pdev->tag = s->fsconf.tag = xenstore_read_fe_str(xendev, "tag");
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v9fs_register_transport(s, &xen_9p_transport);
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fsdev = qemu_opts_create(qemu_find_opts("fsdev"),
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s->fsconf.tag,
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1, NULL);
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@ -455,7 +454,7 @@ static int xen_9pfs_connect(struct XenDevice *xendev)
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qemu_opt_set(fsdev, "security_model", xen_9pdev->security_model, NULL);
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qemu_opts_set_id(fsdev, s->fsconf.fsdev_id);
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qemu_fsdev_add(fsdev);
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v9fs_device_realize_common(s, NULL);
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v9fs_device_realize_common(s, &xen_9p_transport, NULL);
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return 0;
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|
|
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|
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@ -119,6 +119,8 @@ uint8_t qvirtio_wait_status_byte_no_isr(QVirtioDevice *d,
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/*
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* qvirtio_wait_used_elem:
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* @desc_idx: The next expected vq->desc[] index in the used ring
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* @len: A pointer that is filled with the length written into the buffer, may
|
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* be NULL
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* @timeout_us: How many microseconds to wait before failing
|
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*
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* This function waits for the next completed request on the used ring.
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|
|
@ -126,6 +128,7 @@ uint8_t qvirtio_wait_status_byte_no_isr(QVirtioDevice *d,
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void qvirtio_wait_used_elem(QVirtioDevice *d,
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QVirtQueue *vq,
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uint32_t desc_idx,
|
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uint32_t *len,
|
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gint64 timeout_us)
|
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{
|
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gint64 start_time = g_get_monotonic_time();
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|
|
@ -136,7 +139,7 @@ void qvirtio_wait_used_elem(QVirtioDevice *d,
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clock_step(100);
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|
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if (d->bus->get_queue_isr_status(d, vq) &&
|
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qvirtqueue_get_buf(vq, &got_desc_idx)) {
|
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qvirtqueue_get_buf(vq, &got_desc_idx, len)) {
|
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g_assert_cmpint(got_desc_idx, ==, desc_idx);
|
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return;
|
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}
|
||||
|
|
@ -304,30 +307,36 @@ void qvirtqueue_kick(QVirtioDevice *d, QVirtQueue *vq, uint32_t free_head)
|
|||
/*
|
||||
* qvirtqueue_get_buf:
|
||||
* @desc_idx: A pointer that is filled with the vq->desc[] index, may be NULL
|
||||
* @len: A pointer that is filled with the length written into the buffer, may
|
||||
* be NULL
|
||||
*
|
||||
* This function gets the next used element if there is one ready.
|
||||
*
|
||||
* Returns: true if an element was ready, false otherwise
|
||||
*/
|
||||
bool qvirtqueue_get_buf(QVirtQueue *vq, uint32_t *desc_idx)
|
||||
bool qvirtqueue_get_buf(QVirtQueue *vq, uint32_t *desc_idx, uint32_t *len)
|
||||
{
|
||||
uint16_t idx;
|
||||
uint64_t elem_addr;
|
||||
|
||||
idx = readw(vq->used + offsetof(struct vring_used, idx));
|
||||
if (idx == vq->last_used_idx) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if (desc_idx) {
|
||||
uint64_t elem_addr;
|
||||
elem_addr = vq->used +
|
||||
offsetof(struct vring_used, ring) +
|
||||
(vq->last_used_idx % vq->size) *
|
||||
sizeof(struct vring_used_elem);
|
||||
|
||||
elem_addr = vq->used +
|
||||
offsetof(struct vring_used, ring) +
|
||||
(vq->last_used_idx % vq->size) *
|
||||
sizeof(struct vring_used_elem);
|
||||
if (desc_idx) {
|
||||
*desc_idx = readl(elem_addr + offsetof(struct vring_used_elem, id));
|
||||
}
|
||||
|
||||
if (len) {
|
||||
*len = readw(elem_addr + offsetof(struct vring_used_elem, len));
|
||||
}
|
||||
|
||||
vq->last_used_idx++;
|
||||
return true;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -124,6 +124,7 @@ uint8_t qvirtio_wait_status_byte_no_isr(QVirtioDevice *d,
|
|||
void qvirtio_wait_used_elem(QVirtioDevice *d,
|
||||
QVirtQueue *vq,
|
||||
uint32_t desc_idx,
|
||||
uint32_t *len,
|
||||
gint64 timeout_us);
|
||||
void qvirtio_wait_config_isr(QVirtioDevice *d, gint64 timeout_us);
|
||||
QVirtQueue *qvirtqueue_setup(QVirtioDevice *d,
|
||||
|
|
@ -140,7 +141,7 @@ uint32_t qvirtqueue_add(QVirtQueue *vq, uint64_t data, uint32_t len, bool write,
|
|||
bool next);
|
||||
uint32_t qvirtqueue_add_indirect(QVirtQueue *vq, QVRingIndirectDesc *indirect);
|
||||
void qvirtqueue_kick(QVirtioDevice *d, QVirtQueue *vq, uint32_t free_head);
|
||||
bool qvirtqueue_get_buf(QVirtQueue *vq, uint32_t *desc_idx);
|
||||
bool qvirtqueue_get_buf(QVirtQueue *vq, uint32_t *desc_idx, uint32_t *len);
|
||||
|
||||
void qvirtqueue_set_used_event(QVirtQueue *vq, uint16_t idx);
|
||||
|
||||
|
|
|
|||
|
|
@ -17,6 +17,7 @@
|
|||
#include "standard-headers/linux/virtio_ids.h"
|
||||
#include "standard-headers/linux/virtio_pci.h"
|
||||
#include "hw/9pfs/9p.h"
|
||||
#include "hw/9pfs/9p-synth.h"
|
||||
|
||||
#define QVIRTIO_9P_TIMEOUT_US (10 * 1000 * 1000)
|
||||
|
||||
|
|
@ -26,24 +27,19 @@ typedef struct {
|
|||
QVirtioDevice *dev;
|
||||
QOSState *qs;
|
||||
QVirtQueue *vq;
|
||||
char *test_share;
|
||||
uint16_t p9_req_tag;
|
||||
} QVirtIO9P;
|
||||
|
||||
static QVirtIO9P *qvirtio_9p_start(const char *driver)
|
||||
{
|
||||
const char *arch = qtest_get_arch();
|
||||
const char *cmd = "-fsdev local,id=fsdev0,security_model=none,path=%s "
|
||||
const char *cmd = "-fsdev synth,id=fsdev0 "
|
||||
"-device %s,fsdev=fsdev0,mount_tag=%s";
|
||||
QVirtIO9P *v9p = g_new0(QVirtIO9P, 1);
|
||||
|
||||
v9p->test_share = g_strdup("/tmp/qtest.XXXXXX");
|
||||
g_assert_nonnull(mkdtemp(v9p->test_share));
|
||||
|
||||
if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
|
||||
v9p->qs = qtest_pc_boot(cmd, v9p->test_share, driver, mount_tag);
|
||||
v9p->qs = qtest_pc_boot(cmd, driver, mount_tag);
|
||||
} else if (strcmp(arch, "ppc64") == 0) {
|
||||
v9p->qs = qtest_spapr_boot(cmd, v9p->test_share, driver, mount_tag);
|
||||
v9p->qs = qtest_spapr_boot(cmd, driver, mount_tag);
|
||||
} else {
|
||||
g_printerr("virtio-9p tests are only available on x86 or ppc64\n");
|
||||
exit(EXIT_FAILURE);
|
||||
|
|
@ -55,8 +51,6 @@ static QVirtIO9P *qvirtio_9p_start(const char *driver)
|
|||
static void qvirtio_9p_stop(QVirtIO9P *v9p)
|
||||
{
|
||||
qtest_shutdown(v9p->qs);
|
||||
rmdir(v9p->test_share);
|
||||
g_free(v9p->test_share);
|
||||
g_free(v9p);
|
||||
}
|
||||
|
||||
|
|
@ -156,6 +150,13 @@ static void v9fs_uint32_write(P9Req *req, uint32_t val)
|
|||
v9fs_memwrite(req, &le_val, 4);
|
||||
}
|
||||
|
||||
static void v9fs_uint64_write(P9Req *req, uint64_t val)
|
||||
{
|
||||
uint64_t le_val = cpu_to_le64(val);
|
||||
|
||||
v9fs_memwrite(req, &le_val, 8);
|
||||
}
|
||||
|
||||
static void v9fs_uint32_read(P9Req *req, uint32_t *val)
|
||||
{
|
||||
v9fs_memread(req, val, 4);
|
||||
|
|
@ -167,7 +168,7 @@ static uint16_t v9fs_string_size(const char *string)
|
|||
{
|
||||
size_t len = strlen(string);
|
||||
|
||||
g_assert_cmpint(len, <=, UINT16_MAX);
|
||||
g_assert_cmpint(len, <=, UINT16_MAX - 2);
|
||||
|
||||
return 2 + len;
|
||||
}
|
||||
|
|
@ -208,17 +209,20 @@ static P9Req *v9fs_req_init(QVirtIO9P *v9p, uint32_t size, uint8_t id,
|
|||
uint16_t tag)
|
||||
{
|
||||
P9Req *req = g_new0(P9Req, 1);
|
||||
uint32_t t_size = 7 + size; /* 9P header has well-known size of 7 bytes */
|
||||
uint32_t total_size = 7; /* 9P header has well-known size of 7 bytes */
|
||||
P9Hdr hdr = {
|
||||
.size = cpu_to_le32(t_size),
|
||||
.id = id,
|
||||
.tag = cpu_to_le16(tag)
|
||||
};
|
||||
|
||||
g_assert_cmpint(t_size, <=, P9_MAX_SIZE);
|
||||
g_assert_cmpint(total_size, <=, UINT32_MAX - size);
|
||||
total_size += size;
|
||||
hdr.size = cpu_to_le32(total_size);
|
||||
|
||||
g_assert_cmpint(total_size, <=, P9_MAX_SIZE);
|
||||
|
||||
req->v9p = v9p;
|
||||
req->t_size = t_size;
|
||||
req->t_size = total_size;
|
||||
req->t_msg = guest_alloc(v9p->qs->alloc, req->t_size);
|
||||
v9fs_memwrite(req, &hdr, 7);
|
||||
req->tag = tag;
|
||||
|
|
@ -244,17 +248,24 @@ static const char *rmessage_name(uint8_t id)
|
|||
id == P9_RVERSION ? "RVERSION" :
|
||||
id == P9_RATTACH ? "RATTACH" :
|
||||
id == P9_RWALK ? "RWALK" :
|
||||
id == P9_RLOPEN ? "RLOPEN" :
|
||||
id == P9_RWRITE ? "RWRITE" :
|
||||
id == P9_RFLUSH ? "RFLUSH" :
|
||||
"<unknown>";
|
||||
}
|
||||
|
||||
static void v9fs_req_wait_for_reply(P9Req *req, uint32_t *len)
|
||||
{
|
||||
QVirtIO9P *v9p = req->v9p;
|
||||
|
||||
qvirtio_wait_used_elem(v9p->dev, v9p->vq, req->free_head, len,
|
||||
QVIRTIO_9P_TIMEOUT_US);
|
||||
}
|
||||
|
||||
static void v9fs_req_recv(P9Req *req, uint8_t id)
|
||||
{
|
||||
QVirtIO9P *v9p = req->v9p;
|
||||
P9Hdr hdr;
|
||||
|
||||
qvirtio_wait_used_elem(v9p->dev, v9p->vq, req->free_head,
|
||||
QVIRTIO_9P_TIMEOUT_US);
|
||||
|
||||
v9fs_memread(req, &hdr, 7);
|
||||
hdr.size = ldl_le_p(&hdr.size);
|
||||
hdr.tag = lduw_le_p(&hdr.tag);
|
||||
|
|
@ -294,10 +305,16 @@ static void v9fs_rlerror(P9Req *req, uint32_t *err)
|
|||
}
|
||||
|
||||
/* size[4] Tversion tag[2] msize[4] version[s] */
|
||||
static P9Req *v9fs_tversion(QVirtIO9P *v9p, uint32_t msize, const char *version)
|
||||
static P9Req *v9fs_tversion(QVirtIO9P *v9p, uint32_t msize, const char *version,
|
||||
uint16_t tag)
|
||||
{
|
||||
P9Req *req = v9fs_req_init(v9p, 4 + v9fs_string_size(version), P9_TVERSION,
|
||||
P9_NOTAG);
|
||||
P9Req *req;
|
||||
uint32_t body_size = 4;
|
||||
uint16_t string_size = v9fs_string_size(version);
|
||||
|
||||
g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
|
||||
body_size += string_size;
|
||||
req = v9fs_req_init(v9p, body_size, P9_TVERSION, tag);
|
||||
|
||||
v9fs_uint32_write(req, msize);
|
||||
v9fs_string_write(req, version);
|
||||
|
|
@ -323,12 +340,12 @@ static void v9fs_rversion(P9Req *req, uint16_t *len, char **version)
|
|||
}
|
||||
|
||||
/* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */
|
||||
static P9Req *v9fs_tattach(QVirtIO9P *v9p, uint32_t fid, uint32_t n_uname)
|
||||
static P9Req *v9fs_tattach(QVirtIO9P *v9p, uint32_t fid, uint32_t n_uname,
|
||||
uint16_t tag)
|
||||
{
|
||||
const char *uname = ""; /* ignored by QEMU */
|
||||
const char *aname = ""; /* ignored by QEMU */
|
||||
P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH,
|
||||
++(v9p->p9_req_tag));
|
||||
P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH, tag);
|
||||
|
||||
v9fs_uint32_write(req, fid);
|
||||
v9fs_uint32_write(req, P9_NOFID);
|
||||
|
|
@ -353,16 +370,19 @@ static void v9fs_rattach(P9Req *req, v9fs_qid *qid)
|
|||
|
||||
/* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
|
||||
static P9Req *v9fs_twalk(QVirtIO9P *v9p, uint32_t fid, uint32_t newfid,
|
||||
uint16_t nwname, char *const wnames[])
|
||||
uint16_t nwname, char *const wnames[], uint16_t tag)
|
||||
{
|
||||
P9Req *req;
|
||||
int i;
|
||||
uint32_t size = 4 + 4 + 2;
|
||||
uint32_t body_size = 4 + 4 + 2;
|
||||
|
||||
for (i = 0; i < nwname; i++) {
|
||||
size += v9fs_string_size(wnames[i]);
|
||||
uint16_t wname_size = v9fs_string_size(wnames[i]);
|
||||
|
||||
g_assert_cmpint(body_size, <=, UINT32_MAX - wname_size);
|
||||
body_size += wname_size;
|
||||
}
|
||||
req = v9fs_req_init(v9p, size, P9_TWALK, ++(v9p->p9_req_tag));
|
||||
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);
|
||||
|
|
@ -390,6 +410,80 @@ static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid)
|
|||
v9fs_req_free(req);
|
||||
}
|
||||
|
||||
/* size[4] Tlopen tag[2] fid[4] flags[4] */
|
||||
static P9Req *v9fs_tlopen(QVirtIO9P *v9p, uint32_t fid, uint32_t flags,
|
||||
uint16_t tag)
|
||||
{
|
||||
P9Req *req;
|
||||
|
||||
req = v9fs_req_init(v9p, 4 + 4, P9_TLOPEN, tag);
|
||||
v9fs_uint32_write(req, fid);
|
||||
v9fs_uint32_write(req, flags);
|
||||
v9fs_req_send(req);
|
||||
return req;
|
||||
}
|
||||
|
||||
/* size[4] Rlopen tag[2] qid[13] iounit[4] */
|
||||
static void v9fs_rlopen(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
|
||||
{
|
||||
v9fs_req_recv(req, P9_RLOPEN);
|
||||
if (qid) {
|
||||
v9fs_memread(req, qid, 13);
|
||||
} else {
|
||||
v9fs_memskip(req, 13);
|
||||
}
|
||||
if (iounit) {
|
||||
v9fs_uint32_read(req, iounit);
|
||||
}
|
||||
v9fs_req_free(req);
|
||||
}
|
||||
|
||||
/* size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count] */
|
||||
static P9Req *v9fs_twrite(QVirtIO9P *v9p, uint32_t fid, uint64_t offset,
|
||||
uint32_t count, const void *data, uint16_t tag)
|
||||
{
|
||||
P9Req *req;
|
||||
uint32_t body_size = 4 + 8 + 4;
|
||||
|
||||
g_assert_cmpint(body_size, <=, UINT32_MAX - count);
|
||||
body_size += count;
|
||||
req = v9fs_req_init(v9p, body_size, P9_TWRITE, tag);
|
||||
v9fs_uint32_write(req, fid);
|
||||
v9fs_uint64_write(req, offset);
|
||||
v9fs_uint32_write(req, count);
|
||||
v9fs_memwrite(req, data, count);
|
||||
v9fs_req_send(req);
|
||||
return req;
|
||||
}
|
||||
|
||||
/* size[4] Rwrite tag[2] count[4] */
|
||||
static void v9fs_rwrite(P9Req *req, uint32_t *count)
|
||||
{
|
||||
v9fs_req_recv(req, P9_RWRITE);
|
||||
if (count) {
|
||||
v9fs_uint32_read(req, count);
|
||||
}
|
||||
v9fs_req_free(req);
|
||||
}
|
||||
|
||||
/* size[4] Tflush tag[2] oldtag[2] */
|
||||
static P9Req *v9fs_tflush(QVirtIO9P *v9p, uint16_t oldtag, uint16_t tag)
|
||||
{
|
||||
P9Req *req;
|
||||
|
||||
req = v9fs_req_init(v9p, 2, P9_TFLUSH, tag);
|
||||
v9fs_uint32_write(req, oldtag);
|
||||
v9fs_req_send(req);
|
||||
return req;
|
||||
}
|
||||
|
||||
/* size[4] Rflush tag[2] */
|
||||
static void v9fs_rflush(P9Req *req)
|
||||
{
|
||||
v9fs_req_recv(req, P9_RFLUSH);
|
||||
v9fs_req_free(req);
|
||||
}
|
||||
|
||||
static void fs_version(QVirtIO9P *v9p)
|
||||
{
|
||||
const char *version = "9P2000.L";
|
||||
|
|
@ -397,7 +491,8 @@ static void fs_version(QVirtIO9P *v9p)
|
|||
char *server_version;
|
||||
P9Req *req;
|
||||
|
||||
req = v9fs_tversion(v9p, P9_MAX_SIZE, version);
|
||||
req = v9fs_tversion(v9p, P9_MAX_SIZE, version, P9_NOTAG);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rversion(req, &server_len, &server_version);
|
||||
|
||||
g_assert_cmpmem(server_version, server_len, version, strlen(version));
|
||||
|
|
@ -410,34 +505,31 @@ static void fs_attach(QVirtIO9P *v9p)
|
|||
P9Req *req;
|
||||
|
||||
fs_version(v9p);
|
||||
req = v9fs_tattach(v9p, 0, getuid());
|
||||
req = v9fs_tattach(v9p, 0, getuid(), 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rattach(req, NULL);
|
||||
}
|
||||
|
||||
static void fs_walk(QVirtIO9P *v9p)
|
||||
{
|
||||
char *wnames[P9_MAXWELEM], *paths[P9_MAXWELEM];
|
||||
char *last_path = v9p->test_share;
|
||||
char *wnames[P9_MAXWELEM];
|
||||
uint16_t nwqid;
|
||||
v9fs_qid *wqid;
|
||||
int i;
|
||||
P9Req *req;
|
||||
|
||||
for (i = 0; i < P9_MAXWELEM; i++) {
|
||||
wnames[i] = g_strdup_printf("%s%d", __func__, i);
|
||||
last_path = paths[i] = g_strdup_printf("%s/%s", last_path, wnames[i]);
|
||||
g_assert(!mkdir(paths[i], 0700));
|
||||
wnames[i] = g_strdup_printf(QTEST_V9FS_SYNTH_WALK_FILE, i);
|
||||
}
|
||||
|
||||
fs_attach(v9p);
|
||||
req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames);
|
||||
req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rwalk(req, &nwqid, &wqid);
|
||||
|
||||
g_assert_cmpint(nwqid, ==, P9_MAXWELEM);
|
||||
|
||||
for (i = 0; i < P9_MAXWELEM; i++) {
|
||||
rmdir(paths[P9_MAXWELEM - i - 1]);
|
||||
g_free(paths[P9_MAXWELEM - i - 1]);
|
||||
g_free(wnames[i]);
|
||||
}
|
||||
|
||||
|
|
@ -451,7 +543,8 @@ static void fs_walk_no_slash(QVirtIO9P *v9p)
|
|||
uint32_t err;
|
||||
|
||||
fs_attach(v9p);
|
||||
req = v9fs_twalk(v9p, 0, 1, 1, wnames);
|
||||
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rlerror(req, &err);
|
||||
|
||||
g_assert_cmpint(err, ==, ENOENT);
|
||||
|
|
@ -466,10 +559,12 @@ static void fs_walk_dotdot(QVirtIO9P *v9p)
|
|||
P9Req *req;
|
||||
|
||||
fs_version(v9p);
|
||||
req = v9fs_tattach(v9p, 0, getuid());
|
||||
req = v9fs_tattach(v9p, 0, getuid(), 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rattach(req, &root_qid);
|
||||
|
||||
req = v9fs_twalk(v9p, 0, 1, 1, wnames);
|
||||
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rwalk(req, NULL, &wqid); /* We now we'll get one qid */
|
||||
|
||||
g_assert_cmpmem(&root_qid, 13, wqid[0], 13);
|
||||
|
|
@ -478,6 +573,119 @@ static void fs_walk_dotdot(QVirtIO9P *v9p)
|
|||
g_free(wnames[0]);
|
||||
}
|
||||
|
||||
static void fs_lopen(QVirtIO9P *v9p)
|
||||
{
|
||||
char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_LOPEN_FILE) };
|
||||
P9Req *req;
|
||||
|
||||
fs_attach(v9p);
|
||||
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rwalk(req, NULL, NULL);
|
||||
|
||||
req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rlopen(req, NULL, NULL);
|
||||
|
||||
g_free(wnames[0]);
|
||||
}
|
||||
|
||||
static void fs_write(QVirtIO9P *v9p)
|
||||
{
|
||||
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);
|
||||
uint32_t count;
|
||||
P9Req *req;
|
||||
|
||||
fs_attach(v9p);
|
||||
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rwalk(req, NULL, NULL);
|
||||
|
||||
req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rlopen(req, NULL, NULL);
|
||||
|
||||
req = v9fs_twrite(v9p, 1, 0, write_count, buf, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rwrite(req, &count);
|
||||
g_assert_cmpint(count, ==, write_count);
|
||||
|
||||
g_free(buf);
|
||||
g_free(wnames[0]);
|
||||
}
|
||||
|
||||
static void fs_flush_success(QVirtIO9P *v9p)
|
||||
{
|
||||
char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
|
||||
P9Req *req, *flush_req;
|
||||
uint32_t reply_len;
|
||||
uint8_t should_block;
|
||||
|
||||
fs_attach(v9p);
|
||||
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rwalk(req, NULL, NULL);
|
||||
|
||||
req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rlopen(req, NULL, NULL);
|
||||
|
||||
/* This will cause the 9p server to try to write data to the backend,
|
||||
* until the write request gets cancelled.
|
||||
*/
|
||||
should_block = 1;
|
||||
req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
|
||||
|
||||
flush_req = v9fs_tflush(v9p, req->tag, 1);
|
||||
|
||||
/* The write request is supposed to be flushed: the server should just
|
||||
* mark the write request as used and reply to the flush request.
|
||||
*/
|
||||
v9fs_req_wait_for_reply(req, &reply_len);
|
||||
g_assert_cmpint(reply_len, ==, 0);
|
||||
v9fs_req_free(req);
|
||||
v9fs_rflush(flush_req);
|
||||
|
||||
g_free(wnames[0]);
|
||||
}
|
||||
|
||||
static void fs_flush_ignored(QVirtIO9P *v9p)
|
||||
{
|
||||
char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
|
||||
P9Req *req, *flush_req;
|
||||
uint32_t count;
|
||||
uint8_t should_block;
|
||||
|
||||
fs_attach(v9p);
|
||||
req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rwalk(req, NULL, NULL);
|
||||
|
||||
req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rlopen(req, NULL, NULL);
|
||||
|
||||
/* This will cause the write request to complete right away, before it
|
||||
* could be actually cancelled.
|
||||
*/
|
||||
should_block = 0;
|
||||
req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
|
||||
|
||||
flush_req = v9fs_tflush(v9p, req->tag, 1);
|
||||
|
||||
/* The write request is supposed to complete. The server should
|
||||
* reply to the write request and the flush request.
|
||||
*/
|
||||
v9fs_req_wait_for_reply(req, NULL);
|
||||
v9fs_rwrite(req, &count);
|
||||
g_assert_cmpint(count, ==, sizeof(should_block));
|
||||
v9fs_rflush(flush_req);
|
||||
|
||||
g_free(wnames[0]);
|
||||
}
|
||||
|
||||
typedef void (*v9fs_test_fn)(QVirtIO9P *v9p);
|
||||
|
||||
static void v9fs_run_pci_test(gconstpointer data)
|
||||
|
|
@ -507,6 +715,10 @@ int main(int argc, char **argv)
|
|||
v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/no_slash", fs_walk_no_slash);
|
||||
v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/dotdot_from_root",
|
||||
fs_walk_dotdot);
|
||||
v9fs_qtest_pci_add("/virtio/9p/pci/fs/lopen/basic", fs_lopen);
|
||||
v9fs_qtest_pci_add("/virtio/9p/pci/fs/write/basic", fs_write);
|
||||
v9fs_qtest_pci_add("/virtio/9p/pci/fs/flush/success", fs_flush_success);
|
||||
v9fs_qtest_pci_add("/virtio/9p/pci/fs/flush/ignored", fs_flush_ignored);
|
||||
|
||||
return g_test_run();
|
||||
}
|
||||
|
|
|
|||
|
|
@ -193,7 +193,7 @@ static void test_basic(QVirtioDevice *dev, QGuestAllocator *alloc,
|
|||
|
||||
qvirtqueue_kick(dev, vq, free_head);
|
||||
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, NULL, QVIRTIO_BLK_TIMEOUT_US);
|
||||
status = readb(req_addr + 528);
|
||||
g_assert_cmpint(status, ==, 0);
|
||||
|
||||
|
|
@ -215,7 +215,7 @@ static void test_basic(QVirtioDevice *dev, QGuestAllocator *alloc,
|
|||
|
||||
qvirtqueue_kick(dev, vq, free_head);
|
||||
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, NULL, QVIRTIO_BLK_TIMEOUT_US);
|
||||
status = readb(req_addr + 528);
|
||||
g_assert_cmpint(status, ==, 0);
|
||||
|
||||
|
|
@ -243,7 +243,8 @@ static void test_basic(QVirtioDevice *dev, QGuestAllocator *alloc,
|
|||
qvirtqueue_add(vq, req_addr + 528, 1, true, false);
|
||||
qvirtqueue_kick(dev, vq, free_head);
|
||||
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, NULL,
|
||||
QVIRTIO_BLK_TIMEOUT_US);
|
||||
status = readb(req_addr + 528);
|
||||
g_assert_cmpint(status, ==, 0);
|
||||
|
||||
|
|
@ -264,7 +265,8 @@ static void test_basic(QVirtioDevice *dev, QGuestAllocator *alloc,
|
|||
|
||||
qvirtqueue_kick(dev, vq, free_head);
|
||||
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_BLK_TIMEOUT_US);
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, NULL,
|
||||
QVIRTIO_BLK_TIMEOUT_US);
|
||||
status = readb(req_addr + 528);
|
||||
g_assert_cmpint(status, ==, 0);
|
||||
|
||||
|
|
@ -345,7 +347,7 @@ static void pci_indirect(void)
|
|||
free_head = qvirtqueue_add_indirect(&vqpci->vq, indirect);
|
||||
qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);
|
||||
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head, NULL,
|
||||
QVIRTIO_BLK_TIMEOUT_US);
|
||||
status = readb(req_addr + 528);
|
||||
g_assert_cmpint(status, ==, 0);
|
||||
|
|
@ -370,7 +372,7 @@ static void pci_indirect(void)
|
|||
free_head = qvirtqueue_add_indirect(&vqpci->vq, indirect);
|
||||
qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);
|
||||
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head, NULL,
|
||||
QVIRTIO_BLK_TIMEOUT_US);
|
||||
status = readb(req_addr + 528);
|
||||
g_assert_cmpint(status, ==, 0);
|
||||
|
|
@ -481,7 +483,7 @@ static void pci_msix(void)
|
|||
qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);
|
||||
qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);
|
||||
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head, NULL,
|
||||
QVIRTIO_BLK_TIMEOUT_US);
|
||||
|
||||
status = readb(req_addr + 528);
|
||||
|
|
@ -506,7 +508,7 @@ static void pci_msix(void)
|
|||
qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);
|
||||
|
||||
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head, NULL,
|
||||
QVIRTIO_BLK_TIMEOUT_US);
|
||||
|
||||
status = readb(req_addr + 528);
|
||||
|
|
@ -580,7 +582,7 @@ static void pci_idx(void)
|
|||
qvirtqueue_add(&vqpci->vq, req_addr + 528, 1, true, false);
|
||||
qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);
|
||||
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head,
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, free_head, NULL,
|
||||
QVIRTIO_BLK_TIMEOUT_US);
|
||||
|
||||
/* Write request */
|
||||
|
|
@ -627,9 +629,9 @@ static void pci_idx(void)
|
|||
qvirtqueue_kick(&dev->vdev, &vqpci->vq, free_head);
|
||||
|
||||
/* We get just one notification for both requests */
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, write_head,
|
||||
qvirtio_wait_used_elem(&dev->vdev, &vqpci->vq, write_head, NULL,
|
||||
QVIRTIO_BLK_TIMEOUT_US);
|
||||
g_assert(qvirtqueue_get_buf(&vqpci->vq, &desc_idx));
|
||||
g_assert(qvirtqueue_get_buf(&vqpci->vq, &desc_idx, NULL));
|
||||
g_assert_cmpint(desc_idx, ==, free_head);
|
||||
|
||||
status = readb(req_addr + 528);
|
||||
|
|
|
|||
|
|
@ -108,7 +108,7 @@ static void rx_test(QVirtioDevice *dev,
|
|||
ret = iov_send(socket, iov, 2, 0, sizeof(len) + sizeof(test));
|
||||
g_assert_cmpint(ret, ==, sizeof(test) + sizeof(len));
|
||||
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_NET_TIMEOUT_US);
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, NULL, QVIRTIO_NET_TIMEOUT_US);
|
||||
memread(req_addr + VNET_HDR_SIZE, buffer, sizeof(test));
|
||||
g_assert_cmpstr(buffer, ==, "TEST");
|
||||
|
||||
|
|
@ -131,7 +131,7 @@ static void tx_test(QVirtioDevice *dev,
|
|||
free_head = qvirtqueue_add(vq, req_addr, 64, false, false);
|
||||
qvirtqueue_kick(dev, vq, free_head);
|
||||
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_NET_TIMEOUT_US);
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, NULL, QVIRTIO_NET_TIMEOUT_US);
|
||||
guest_free(alloc, req_addr);
|
||||
|
||||
ret = qemu_recv(socket, &len, sizeof(len), 0);
|
||||
|
|
@ -182,7 +182,7 @@ static void rx_stop_cont_test(QVirtioDevice *dev,
|
|||
rsp = qmp("{ 'execute' : 'cont'}");
|
||||
QDECREF(rsp);
|
||||
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, QVIRTIO_NET_TIMEOUT_US);
|
||||
qvirtio_wait_used_elem(dev, vq, free_head, NULL, QVIRTIO_NET_TIMEOUT_US);
|
||||
memread(req_addr + VNET_HDR_SIZE, buffer, sizeof(test));
|
||||
g_assert_cmpstr(buffer, ==, "TEST");
|
||||
|
||||
|
|
|
|||
|
|
@ -121,7 +121,8 @@ static uint8_t virtio_scsi_do_command(QVirtIOSCSI *vs, const uint8_t *cdb,
|
|||
}
|
||||
|
||||
qvirtqueue_kick(vs->dev, vq, free_head);
|
||||
qvirtio_wait_used_elem(vs->dev, vq, free_head, QVIRTIO_SCSI_TIMEOUT_US);
|
||||
qvirtio_wait_used_elem(vs->dev, vq, free_head, NULL,
|
||||
QVIRTIO_SCSI_TIMEOUT_US);
|
||||
|
||||
response = readb(resp_addr +
|
||||
offsetof(struct virtio_scsi_cmd_resp, response));
|
||||
|
|
|
|||
Loading…
Reference in a new issue