diff options
author | Greg Kurz <groug@kaod.org> | 2018-02-01 21:21:28 +0100 |
---|---|---|
committer | Greg Kurz <groug@kaod.org> | 2018-02-02 11:11:55 +0100 |
commit | 357e2f7f4e4dc68f01d5b81f5cd669874314e14a (patch) | |
tree | 77a200e760142625271e2b69c79e510eb25f6f9f /hw | |
parent | be3a6781605803b2c48a48135002869ed2c73cf1 (diff) |
tests: virtio-9p: add FLUSH operation test
The idea is to send a victim request that will possibly block in the
server and to send a flush request to cancel the victim request.
This patch adds two test to verifiy that:
- the server does not reply to a victim request that was actually
cancelled
- the server replies to the flush request after replying to the
victim request if it could not cancel it
9p request cancellation reference:
http://man.cat-v.org/plan_9/5/flush
Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
(groug, change the test to only write a single byte to avoid
any alignment or endianess consideration)
Diffstat (limited to 'hw')
-rw-r--r-- | hw/9pfs/9p-synth.c | 20 | ||||
-rw-r--r-- | hw/9pfs/9p-synth.h | 7 | ||||
-rw-r--r-- | hw/9pfs/9p.c | 1 |
3 files changed, 28 insertions, 0 deletions
diff --git a/hw/9pfs/9p-synth.c b/hw/9pfs/9p-synth.c index ade3460706..18082dffe8 100644 --- a/hw/9pfs/9p-synth.c +++ b/hw/9pfs/9p-synth.c @@ -521,6 +521,20 @@ static ssize_t v9fs_synth_qtest_write(void *buf, int len, off_t offset, return 1; } +static ssize_t v9fs_synth_qtest_flush_write(void *buf, int len, off_t offset, + void *arg) +{ + bool should_block = !!*(uint8_t *)buf; + + if (should_block) { + /* This will cause the server to call us again until we're cancelled */ + errno = EINTR; + return -1; + } + + return 1; +} + static int synth_init(FsContext *ctx, Error **errp) { QLIST_INIT(&synth_root.child); @@ -557,6 +571,12 @@ static int synth_init(FsContext *ctx, Error **errp) ret = qemu_v9fs_synth_add_file(NULL, 0, QTEST_V9FS_SYNTH_WRITE_FILE, NULL, v9fs_synth_qtest_write, ctx); assert(!ret); + + /* File for FLUSH test */ + ret = qemu_v9fs_synth_add_file(NULL, 0, QTEST_V9FS_SYNTH_FLUSH_FILE, + NULL, v9fs_synth_qtest_flush_write, + ctx); + assert(!ret); } return 0; diff --git a/hw/9pfs/9p-synth.h b/hw/9pfs/9p-synth.h index a74032d7bd..af7a993a1e 100644 --- a/hw/9pfs/9p-synth.h +++ b/hw/9pfs/9p-synth.h @@ -55,4 +55,11 @@ int qemu_v9fs_synth_add_file(V9fsSynthNode *parent, int mode, #define QTEST_V9FS_SYNTH_LOPEN_FILE "LOPEN" #define QTEST_V9FS_SYNTH_WRITE_FILE "WRITE" +/* Any write to the "FLUSH" file is handled one byte at a time by the + * backend. If the byte is zero, the backend returns success (ie, 1), + * otherwise it forces the server to try again forever. Thus allowing + * the client to cancel the request. + */ +#define QTEST_V9FS_SYNTH_FLUSH_FILE "FLUSH" + #endif diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c index e88bb50f13..85a1ed8171 100644 --- a/hw/9pfs/9p.c +++ b/hw/9pfs/9p.c @@ -24,6 +24,7 @@ #include "coth.h" #include "trace.h" #include "migration/blocker.h" +#include "sysemu/qtest.h" int open_fd_hw; int total_open_fd; |