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filemon: various fixes / improvements to file monitor for USB MTP

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Ensure watch IDs unique within a monitor and avoid integer wraparound
 issues when many watches are set & unset over time.
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Merge remote-tracking branch 'remotes/berrange/tags/filemon-next-pull-request' into staging

filemon: various fixes / improvements to file monitor for USB MTP

Ensure watch IDs unique within a monitor and avoid integer wraparound
issues when many watches are set & unset over time.

# gpg: Signature made Tue 02 Apr 2019 13:53:40 BST
# gpg:                using RSA key BE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>" [full]
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>" [full]
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E  8E3F BE86 EBB4 1510 4FDF

* remotes/berrange/tags/filemon-next-pull-request:
  filemon: fix watch IDs to avoid potential wraparound issues
  filemon: ensure watch IDs are unique to QFileMonitor scope
  tests: refactor file monitor test to make it more understandable

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2019-04-02 14:52:17 +01:00
parent 9a363f0bcc b4682a63f8
commit 436960c959
8 changed files with 359 additions and 363 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
authz/listfile.c
View file

@ -93,7 +93,7 @@ qauthz_list_file_load(QAuthZListFile *fauthz, Error **errp)
static void
qauthz_list_file_event(int wd G_GNUC_UNUSED,
qauthz_list_file_event(int64_t wd G_GNUC_UNUSED,
QFileMonitorEvent ev G_GNUC_UNUSED,
const char *name G_GNUC_UNUSED,
void *opaque)

10
hw/usb/dev-mtp.c
View file

@ -170,7 +170,7 @@ struct MTPObject {
char *path;
struct stat stat;
/* file monitor watch id */
int watchid;
int64_t watchid;
MTPObject *parent;
uint32_t nchildren;
QLIST_HEAD(, MTPObject) children;
@ -498,7 +498,7 @@ static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent,
return NULL;
}
static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int id)
static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int64_t id)
{
MTPObject *iter;
@ -511,7 +511,7 @@ static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int id)
return NULL;
}
static void file_monitor_event(int id,
static void file_monitor_event(int64_t id,
QFileMonitorEvent ev,
const char *name,
void *opaque)
@ -625,8 +625,8 @@ static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
}
if (s->file_monitor) {
int id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL,
file_monitor_event, s, &err);
int64_t id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL,
file_monitor_event, s, &err);
if (id == -1) {
error_report("usb-mtp: failed to add watch for %s: %s", o->path,
error_get_pretty(err));

2
include/authz/listfile.h
View file

@ -92,7 +92,7 @@ struct QAuthZListFile {
char *filename;
bool refresh;
QFileMonitor *file_monitor;
int file_watch;
int64_t file_watch;
};

16
include/qemu/filemonitor.h
View file

@ -52,7 +52,7 @@ typedef enum {
* empty.
*
*/
typedef void (*QFileMonitorHandler)(int id,
typedef void (*QFileMonitorHandler)(int64_t id,
QFileMonitorEvent event,
const char *filename,
void *opaque);
@ -103,12 +103,12 @@ void qemu_file_monitor_free(QFileMonitor *mon);
*
* Returns: a positive integer watch ID, or -1 on error
*/
int qemu_file_monitor_add_watch(QFileMonitor *mon,
const char *dirpath,
const char *filename,
QFileMonitorHandler cb,
void *opaque,
Error **errp);
int64_t qemu_file_monitor_add_watch(QFileMonitor *mon,
const char *dirpath,
const char *filename,
QFileMonitorHandler cb,
void *opaque,
Error **errp);
/**
* qemu_file_monitor_remove_watch:
@ -123,6 +123,6 @@ int qemu_file_monitor_add_watch(QFileMonitor *mon,
*/
void qemu_file_monitor_remove_watch(QFileMonitor *mon,
const char *dirpath,
int id);
int64_t id);
#endif /* QEMU_FILE_MONITOR_H */

656
tests/test-util-filemonitor.c
View file

@ -26,34 +26,29 @@
#include <utime.h>
enum {
QFILE_MONITOR_TEST_OP_ADD_WATCH,
QFILE_MONITOR_TEST_OP_DEL_WATCH,
QFILE_MONITOR_TEST_OP_EVENT,
QFILE_MONITOR_TEST_OP_CREATE,
QFILE_MONITOR_TEST_OP_APPEND,
QFILE_MONITOR_TEST_OP_TRUNC,
QFILE_MONITOR_TEST_OP_RENAME,
QFILE_MONITOR_TEST_OP_TOUCH,
QFILE_MONITOR_TEST_OP_UNLINK,
QFILE_MONITOR_TEST_OP_MKDIR,
QFILE_MONITOR_TEST_OP_RMDIR,
};
typedef struct {
int type;
const char *filesrc;
const char *filedst;
int64_t *watchid;
int eventid;
} QFileMonitorTestOp;
typedef struct {
const char *file;
} QFileMonitorTestWatch;
typedef struct {
gsize nwatches;
const QFileMonitorTestWatch *watches;
gsize nops;
const QFileMonitorTestOp *ops;
} QFileMonitorTestPlan;
typedef struct {
int id;
int64_t id;
QFileMonitorEvent event;
char *filename;
} QFileMonitorTestRecord;
@ -67,6 +62,7 @@ typedef struct {
static QemuMutex evlock;
static bool evstopping;
static bool evrunning;
static bool debug;
/*
* Main function for a background thread that is
@ -94,7 +90,7 @@ qemu_file_monitor_test_event_loop(void *opaque G_GNUC_UNUSED)
* an ordered list of all events that it receives
*/
static void
qemu_file_monitor_test_handler(int id,
qemu_file_monitor_test_handler(int64_t id,
QFileMonitorEvent event,
const char *filename,
void *opaque)
@ -160,7 +156,7 @@ qemu_file_monitor_test_next_record(QFileMonitorTestData *data)
*/
static bool
qemu_file_monitor_test_expect(QFileMonitorTestData *data,
int id,
int64_t id,
QFileMonitorEvent event,
const char *filename)
{
@ -170,13 +166,14 @@ qemu_file_monitor_test_expect(QFileMonitorTestData *data,
rec = qemu_file_monitor_test_next_record(data);
if (!rec) {
g_printerr("Missing event watch id %d event %d file %s\n",
g_printerr("Missing event watch id %" PRIx64 " event %d file %s\n",
id, event, filename);
return false;
}
if (id != rec->id) {
g_printerr("Expected watch id %d but got %d\n", id, rec->id);
g_printerr("Expected watch id %" PRIx64 " but got %" PRIx64 "\n",
id, rec->id);
goto cleanup;
}
@ -200,9 +197,179 @@ qemu_file_monitor_test_expect(QFileMonitorTestData *data,
static void
test_file_monitor_events(const void *opaque)
test_file_monitor_events(void)
{
const QFileMonitorTestPlan *plan = opaque;
int64_t watch0 = 0;
int64_t watch1 = 0;
int64_t watch2 = 0;
int64_t watch3 = 0;
int64_t watch4 = 0;
int64_t watch5 = 0;
QFileMonitorTestOp ops[] = {
{ .type = QFILE_MONITOR_TEST_OP_ADD_WATCH,
.filesrc = NULL, .watchid = &watch0 },
{ .type = QFILE_MONITOR_TEST_OP_ADD_WATCH,
.filesrc = "one.txt", .watchid = &watch1 },
{ .type = QFILE_MONITOR_TEST_OP_ADD_WATCH,
.filesrc = "two.txt", .watchid = &watch2 },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "one.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "one.txt", .watchid = &watch1,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "two.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch2,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "three.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "three.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_UNLINK,
.filesrc = "three.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "three.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_DELETED },
{ .type = QFILE_MONITOR_TEST_OP_RENAME,
.filesrc = "one.txt", .filedst = "two.txt" },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "one.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_DELETED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "one.txt", .watchid = &watch1,
.eventid = QFILE_MONITOR_EVENT_DELETED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch2,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_APPEND,
.filesrc = "two.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_MODIFIED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch2,
.eventid = QFILE_MONITOR_EVENT_MODIFIED },
{ .type = QFILE_MONITOR_TEST_OP_TOUCH,
.filesrc = "two.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_ATTRIBUTES },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch2,
.eventid = QFILE_MONITOR_EVENT_ATTRIBUTES },
{ .type = QFILE_MONITOR_TEST_OP_DEL_WATCH,
.filesrc = "one.txt", .watchid = &watch1 },
{ .type = QFILE_MONITOR_TEST_OP_ADD_WATCH,
.filesrc = "one.txt", .watchid = &watch3 },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "one.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "one.txt", .watchid = &watch3,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_DEL_WATCH,
.filesrc = "one.txt", .watchid = &watch3 },
{ .type = QFILE_MONITOR_TEST_OP_UNLINK,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "one.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_DELETED },
{ .type = QFILE_MONITOR_TEST_OP_MKDIR,
.filesrc = "fish", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "fish", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_ADD_WATCH,
.filesrc = "fish/", .watchid = &watch4 },
{ .type = QFILE_MONITOR_TEST_OP_ADD_WATCH,
.filesrc = "fish/one.txt", .watchid = &watch5 },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "fish/one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "one.txt", .watchid = &watch4,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "one.txt", .watchid = &watch5,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_DEL_WATCH,
.filesrc = "fish/one.txt", .watchid = &watch5 },
{ .type = QFILE_MONITOR_TEST_OP_RENAME,
.filesrc = "fish/one.txt", .filedst = "two.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "one.txt", .watchid = &watch4,
.eventid = QFILE_MONITOR_EVENT_DELETED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch2,
.eventid = QFILE_MONITOR_EVENT_CREATED },
{ .type = QFILE_MONITOR_TEST_OP_RMDIR,
.filesrc = "fish", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "", .watchid = &watch4,
.eventid = QFILE_MONITOR_EVENT_IGNORED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "fish", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_DELETED },
{ .type = QFILE_MONITOR_TEST_OP_DEL_WATCH,
.filesrc = "fish", .watchid = &watch4 },
{ .type = QFILE_MONITOR_TEST_OP_UNLINK,
.filesrc = "two.txt", },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch0,
.eventid = QFILE_MONITOR_EVENT_DELETED },
{ .type = QFILE_MONITOR_TEST_OP_EVENT,
.filesrc = "two.txt", .watchid = &watch2,
.eventid = QFILE_MONITOR_EVENT_DELETED },
{ .type = QFILE_MONITOR_TEST_OP_DEL_WATCH,
.filesrc = "two.txt", .watchid = &watch2 },
{ .type = QFILE_MONITOR_TEST_OP_DEL_WATCH,
.filesrc = NULL, .watchid = &watch0 },
};
Error *local_err = NULL;
GError *gerr = NULL;
QFileMonitor *mon = qemu_file_monitor_new(&local_err);
@ -210,10 +377,11 @@ test_file_monitor_events(const void *opaque)
GTimer *timer;
gchar *dir = NULL;
int err = -1;
gsize i, j;
gsize i;
char *pathsrc = NULL;
char *pathdst = NULL;
QFileMonitorTestData data;
GHashTable *ids = g_hash_table_new(g_int64_hash, g_int64_equal);
qemu_mutex_init(&data.lock);
data.records = NULL;
@ -248,34 +416,15 @@ test_file_monitor_events(const void *opaque)
}
/*
* First register all the directory / file watches
* we're interested in seeing events against
* Run through the operation sequence validating events
* as we go
*/
for (i = 0; i < plan->nwatches; i++) {
int watchid;
watchid = qemu_file_monitor_add_watch(mon,
dir,
plan->watches[i].file,
qemu_file_monitor_test_handler,
&data,
&local_err);
if (watchid < 0) {
g_printerr("Unable to add watch %s",
error_get_pretty(local_err));
goto cleanup;
}
}
/*
* Now invoke all the file operations (create,
* delete, rename, chmod, etc). These operations
* will trigger the various file monitor events
*/
for (i = 0; i < plan->nops; i++) {
const QFileMonitorTestOp *op = &(plan->ops[i]);
for (i = 0; i < G_N_ELEMENTS(ops); i++) {
const QFileMonitorTestOp *op = &(ops[i]);
int fd;
struct utimbuf ubuf;
char *watchdir;
const char *watchfile;
pathsrc = g_strdup_printf("%s/%s", dir, op->filesrc);
if (op->filedst) {
@ -283,7 +432,75 @@ test_file_monitor_events(const void *opaque)
}
switch (op->type) {
case QFILE_MONITOR_TEST_OP_ADD_WATCH:
if (debug) {
g_printerr("Add watch %s %s\n",
dir, op->filesrc);
}
if (op->filesrc && strchr(op->filesrc, '/')) {
watchdir = g_strdup_printf("%s/%s", dir, op->filesrc);
watchfile = strrchr(watchdir, '/');
*(char *)watchfile = '\0';
watchfile++;
if (*watchfile == '\0') {
watchfile = NULL;
}
} else {
watchdir = g_strdup(dir);
watchfile = op->filesrc;
}
*op->watchid =
qemu_file_monitor_add_watch(mon,
watchdir,
watchfile,
qemu_file_monitor_test_handler,
&data,
&local_err);
g_free(watchdir);
if (*op->watchid < 0) {
g_printerr("Unable to add watch %s",
error_get_pretty(local_err));
goto cleanup;
}
if (debug) {
g_printerr("Watch ID %" PRIx64 "\n", *op->watchid);
}
if (g_hash_table_contains(ids, op->watchid)) {
g_printerr("Watch ID %" PRIx64 "already exists", *op->watchid);
goto cleanup;
}
g_hash_table_add(ids, op->watchid);
break;
case QFILE_MONITOR_TEST_OP_DEL_WATCH:
if (debug) {
g_printerr("Del watch %s %" PRIx64 "\n", dir, *op->watchid);
}
if (op->filesrc && strchr(op->filesrc, '/')) {
watchdir = g_strdup_printf("%s/%s", dir, op->filesrc);
watchfile = strrchr(watchdir, '/');
*(char *)watchfile = '\0';
} else {
watchdir = g_strdup(dir);
}
g_hash_table_remove(ids, op->watchid);
qemu_file_monitor_remove_watch(mon,
watchdir,
*op->watchid);
g_free(watchdir);
break;
case QFILE_MONITOR_TEST_OP_EVENT:
if (debug) {
g_printerr("Event id=%" PRIx64 " event=%d file=%s\n",
*op->watchid, op->eventid, op->filesrc);
}
if (!qemu_file_monitor_test_expect(
&data, *op->watchid, op->eventid, op->filesrc))
goto cleanup;
break;
case QFILE_MONITOR_TEST_OP_CREATE:
if (debug) {
g_printerr("Create %s\n", pathsrc);
}
fd = open(pathsrc, O_WRONLY | O_CREAT, 0700);
if (fd < 0) {
g_printerr("Unable to create %s: %s",
@ -294,6 +511,9 @@ test_file_monitor_events(const void *opaque)
break;
case QFILE_MONITOR_TEST_OP_APPEND:
if (debug) {
g_printerr("Append %s\n", pathsrc);
}
fd = open(pathsrc, O_WRONLY | O_APPEND, 0700);
if (fd < 0) {
g_printerr("Unable to open %s: %s",
@ -311,6 +531,9 @@ test_file_monitor_events(const void *opaque)
break;
case QFILE_MONITOR_TEST_OP_TRUNC:
if (debug) {
g_printerr("Truncate %s\n", pathsrc);
}
if (truncate(pathsrc, 4) < 0) {
g_printerr("Unable to truncate %s: %s",
pathsrc, strerror(errno));
@ -319,6 +542,9 @@ test_file_monitor_events(const void *opaque)
break;
case QFILE_MONITOR_TEST_OP_RENAME:
if (debug) {
g_printerr("Rename %s -> %s\n", pathsrc, pathdst);
}
if (rename(pathsrc, pathdst) < 0) {
g_printerr("Unable to rename %s to %s: %s",
pathsrc, pathdst, strerror(errno));
@ -327,6 +553,9 @@ test_file_monitor_events(const void *opaque)
break;
case QFILE_MONITOR_TEST_OP_UNLINK:
if (debug) {
g_printerr("Unlink %s\n", pathsrc);
}
if (unlink(pathsrc) < 0) {
g_printerr("Unable to unlink %s: %s",
pathsrc, strerror(errno));
@ -335,6 +564,9 @@ test_file_monitor_events(const void *opaque)
break;
case QFILE_MONITOR_TEST_OP_TOUCH:
if (debug) {
g_printerr("Touch %s\n", pathsrc);
}
ubuf.actime = 1024;
ubuf.modtime = 1025;
if (utime(pathsrc, &ubuf) < 0) {
@ -344,6 +576,28 @@ test_file_monitor_events(const void *opaque)
}
break;
case QFILE_MONITOR_TEST_OP_MKDIR:
if (debug) {
g_printerr("Mkdir %s\n", pathsrc);
}
if (mkdir(pathsrc, 0700) < 0) {
g_printerr("Unable to mkdir %s: %s",
pathsrc, strerror(errno));
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_RMDIR:
if (debug) {
g_printerr("Rmdir %s\n", pathsrc);
}
if (rmdir(pathsrc) < 0) {
g_printerr("Unable to rmdir %s: %s",
pathsrc, strerror(errno));
goto cleanup;
}
break;
default:
g_assert_not_reached();
}
@ -353,91 +607,7 @@ test_file_monitor_events(const void *opaque)
pathsrc = pathdst = NULL;
}
/*
* Finally validate that we have received all the events
* we expect to see for the combination of watches and
* file operations
*/
for (i = 0; i < plan->nops; i++) {
const QFileMonitorTestOp *op = &(plan->ops[i]);
switch (op->type) {
case QFILE_MONITOR_TEST_OP_CREATE:
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filesrc))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_CREATED, op->filesrc))
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_APPEND:
case QFILE_MONITOR_TEST_OP_TRUNC:
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filesrc))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_MODIFIED, op->filesrc))
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_RENAME:
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filesrc))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_DELETED, op->filesrc))
goto cleanup;
}
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filedst))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_CREATED, op->filedst))
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_TOUCH:
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filesrc))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_ATTRIBUTES, op->filesrc))
goto cleanup;
}
break;
case QFILE_MONITOR_TEST_OP_UNLINK:
for (j = 0; j < plan->nwatches; j++) {
if (plan->watches[j].file &&
!g_str_equal(plan->watches[j].file, op->filesrc))
continue;
if (!qemu_file_monitor_test_expect(
&data, j, QFILE_MONITOR_EVENT_DELETED, op->filesrc))
goto cleanup;
}
break;
default:
g_assert_not_reached();
}
}
g_assert_cmpint(g_hash_table_size(ids), ==, 0);
err = 0;
@ -460,171 +630,42 @@ test_file_monitor_events(const void *opaque)
}
g_timer_destroy(timer);
for (i = 0; i < plan->nops; i++) {
const QFileMonitorTestOp *op = &(plan->ops[i]);
pathsrc = g_strdup_printf("%s/%s", dir, op->filesrc);
unlink(pathsrc);
g_free(pathsrc);
if (op->filedst) {
pathdst = g_strdup_printf("%s/%s", dir, op->filedst);
unlink(pathdst);
g_free(pathdst);
}
}
qemu_file_monitor_free(mon);
g_list_foreach(data.records,
(GFunc)qemu_file_monitor_test_record_free, NULL);
g_list_free(data.records);
qemu_mutex_destroy(&data.lock);
if (dir) {
rmdir(dir);
for (i = 0; i < G_N_ELEMENTS(ops); i++) {
const QFileMonitorTestOp *op = &(ops[i]);
char *path = g_strdup_printf("%s/%s",
dir, op->filesrc);
if (op->type == QFILE_MONITOR_TEST_OP_MKDIR) {
rmdir(path);
g_free(path);
} else {
unlink(path);
g_free(path);
if (op->filedst) {
path = g_strdup_printf("%s/%s",
dir, op->filedst);
unlink(path);
g_free(path);
}
}
}
if (rmdir(dir) < 0) {
g_printerr("Failed to remove %s: %s\n",
dir, strerror(errno));
abort();
}
}
g_hash_table_unref(ids);
g_free(dir);
g_assert(err == 0);
}
/*
* Set of structs which define which file name patterns
* we're trying to watch against. NULL, means all files
* in the directory
*/
static const QFileMonitorTestWatch watches_any[] = {
{ NULL },
};
static const QFileMonitorTestWatch watches_one[] = {
{ "one.txt" },
};
static const QFileMonitorTestWatch watches_two[] = {
{ "two.txt" },
};
static const QFileMonitorTestWatch watches_many[] = {
{ NULL },
{ "one.txt" },
{ "two.txt" },
};
/*
* Various sets of file operations we're going to
* trigger and validate events for
*/
static const QFileMonitorTestOp ops_create_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", }
};
static const QFileMonitorTestOp ops_delete_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_UNLINK,
.filesrc = "one.txt", }
};
static const QFileMonitorTestOp ops_create_many[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "two.txt", },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "three.txt", }
};
static const QFileMonitorTestOp ops_rename_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_RENAME,
.filesrc = "one.txt", .filedst = "two.txt" }
};
static const QFileMonitorTestOp ops_rename_many[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "two.txt", },
{ .type = QFILE_MONITOR_TEST_OP_RENAME,
.filesrc = "one.txt", .filedst = "two.txt" }
};
static const QFileMonitorTestOp ops_append_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_APPEND,
.filesrc = "one.txt", },
};
static const QFileMonitorTestOp ops_trunc_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_TRUNC,
.filesrc = "one.txt", },
};
static const QFileMonitorTestOp ops_touch_one[] = {
{ .type = QFILE_MONITOR_TEST_OP_CREATE,
.filesrc = "one.txt", },
{ .type = QFILE_MONITOR_TEST_OP_TOUCH,
.filesrc = "one.txt", },
};
/*
* No we define data sets for the combinatorial
* expansion of file watches and operation sets
*/
#define PLAN_DATA(o, w) \
static const QFileMonitorTestPlan plan_ ## o ## _ ## w = { \
.nops = G_N_ELEMENTS(ops_ ##o), \
.ops = ops_ ##o, \
.nwatches = G_N_ELEMENTS(watches_ ##w), \
.watches = watches_ ## w, \
}
PLAN_DATA(create_one, any);
PLAN_DATA(create_one, one);
PLAN_DATA(create_one, two);
PLAN_DATA(create_one, many);
PLAN_DATA(delete_one, any);
PLAN_DATA(delete_one, one);
PLAN_DATA(delete_one, two);
PLAN_DATA(delete_one, many);
PLAN_DATA(create_many, any);
PLAN_DATA(create_many, one);
PLAN_DATA(create_many, two);
PLAN_DATA(create_many, many);
PLAN_DATA(rename_one, any);
PLAN_DATA(rename_one, one);
PLAN_DATA(rename_one, two);
PLAN_DATA(rename_one, many);
PLAN_DATA(rename_many, any);
PLAN_DATA(rename_many, one);
PLAN_DATA(rename_many, two);
PLAN_DATA(rename_many, many);
PLAN_DATA(append_one, any);
PLAN_DATA(append_one, one);
PLAN_DATA(append_one, two);
PLAN_DATA(append_one, many);
PLAN_DATA(trunc_one, any);
PLAN_DATA(trunc_one, one);
PLAN_DATA(trunc_one, two);
PLAN_DATA(trunc_one, many);
PLAN_DATA(touch_one, any);
PLAN_DATA(touch_one, one);
PLAN_DATA(touch_one, two);
PLAN_DATA(touch_one, many);
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
@ -633,53 +674,8 @@ int main(int argc, char **argv)
qemu_mutex_init(&evlock);
/*
* Register test cases for the combinatorial
* expansion of file watches and operation sets
*/
#define PLAN_REGISTER(o, w) \
g_test_add_data_func("/util/filemonitor/" # o "/" # w, \
&plan_ ## o ## _ ## w, test_file_monitor_events)
PLAN_REGISTER(create_one, any);
PLAN_REGISTER(create_one, one);
PLAN_REGISTER(create_one, two);
PLAN_REGISTER(create_one, many);
PLAN_REGISTER(delete_one, any);
PLAN_REGISTER(delete_one, one);
PLAN_REGISTER(delete_one, two);
PLAN_REGISTER(delete_one, many);
PLAN_REGISTER(create_many, any);
PLAN_REGISTER(create_many, one);
PLAN_REGISTER(create_many, two);
PLAN_REGISTER(create_many, many);
PLAN_REGISTER(rename_one, any);
PLAN_REGISTER(rename_one, one);
PLAN_REGISTER(rename_one, two);
PLAN_REGISTER(rename_one, many);
PLAN_REGISTER(rename_many, any);
PLAN_REGISTER(rename_many, one);
PLAN_REGISTER(rename_many, two);
PLAN_REGISTER(rename_many, many);
PLAN_REGISTER(append_one, any);
PLAN_REGISTER(append_one, one);
PLAN_REGISTER(append_one, two);
PLAN_REGISTER(append_one, many);
PLAN_REGISTER(trunc_one, any);
PLAN_REGISTER(trunc_one, one);
PLAN_REGISTER(trunc_one, two);
PLAN_REGISTER(trunc_one, many);
PLAN_REGISTER(touch_one, any);
PLAN_REGISTER(touch_one, one);
PLAN_REGISTER(touch_one, two);
PLAN_REGISTER(touch_one, many);
debug = getenv("FILEMONITOR_DEBUG") != NULL;
g_test_add_func("/util/filemonitor", test_file_monitor_events);
return g_test_run();
}

26
util/filemonitor-inotify.c
View file

@ -29,7 +29,6 @@
struct QFileMonitor {
int fd;
QemuMutex lock; /* protects dirs & idmap */
GHashTable *dirs; /* dirname => QFileMonitorDir */
GHashTable *idmap; /* inotify ID => dirname */
@ -37,7 +36,7 @@ struct QFileMonitor {
typedef struct {
int id; /* watch ID */
int64_t id; /* watch ID */
char *filename; /* optional filter */
QFileMonitorHandler cb;
void *opaque;
@ -46,8 +45,8 @@ typedef struct {
typedef struct {
char *path;
int id; /* inotify ID */
int nextid; /* watch ID counter */
int inotify_id; /* inotify ID */
int next_file_id; /* file ID counter */
GArray *watches; /* QFileMonitorWatch elements */
} QFileMonitorDir;
@ -127,7 +126,8 @@ static void qemu_file_monitor_watch(void *arg)
g_assert_not_reached();
}
trace_qemu_file_monitor_event(mon, dir->path, name, ev->mask, dir->id);
trace_qemu_file_monitor_event(mon, dir->path, name, ev->mask,
dir->inotify_id);
for (i = 0; i < dir->watches->len; i++) {
QFileMonitorWatch *watch = &g_array_index(dir->watches,
QFileMonitorWatch,
@ -238,7 +238,7 @@ qemu_file_monitor_free(QFileMonitor *mon)
g_idle_add((GSourceFunc)qemu_file_monitor_free_idle, mon);
}
int
int64_t
qemu_file_monitor_add_watch(QFileMonitor *mon,
const char *dirpath,
const char *filename,
@ -248,7 +248,7 @@ qemu_file_monitor_add_watch(QFileMonitor *mon,
{
QFileMonitorDir *dir;
QFileMonitorWatch watch;
int ret = -1;
int64_t ret = -1;
qemu_mutex_lock(&mon->lock);
dir = g_hash_table_lookup(mon->dirs, dirpath);
@ -266,7 +266,7 @@ qemu_file_monitor_add_watch(QFileMonitor *mon,
dir = g_new0(QFileMonitorDir, 1);
dir->path = g_strdup(dirpath);
dir->id = rv;
dir->inotify_id = rv;
dir->watches = g_array_new(FALSE, TRUE, sizeof(QFileMonitorWatch));
g_hash_table_insert(mon->dirs, dir->path, dir);
@ -277,7 +277,7 @@ qemu_file_monitor_add_watch(QFileMonitor *mon,
}
}
watch.id = dir->nextid++;
watch.id = (((int64_t)dir->inotify_id) << 32) | dir->next_file_id++;
watch.filename = g_strdup(filename);
watch.cb = cb;
watch.opaque = opaque;
@ -298,7 +298,7 @@ qemu_file_monitor_add_watch(QFileMonitor *mon,
void qemu_file_monitor_remove_watch(QFileMonitor *mon,
const char *dirpath,
int id)
int64_t id)
{
QFileMonitorDir *dir;
gsize i;
@ -323,10 +323,10 @@ void qemu_file_monitor_remove_watch(QFileMonitor *mon,
}
if (dir->watches->len == 0) {
inotify_rm_watch(mon->fd, dir->id);
trace_qemu_file_monitor_disable_watch(mon, dir->path, dir->id);
inotify_rm_watch(mon->fd, dir->inotify_id);
trace_qemu_file_monitor_disable_watch(mon, dir->path, dir->inotify_id);
g_hash_table_remove(mon->idmap, GINT_TO_POINTER(dir->id));
g_hash_table_remove(mon->idmap, GINT_TO_POINTER(dir->inotify_id));
g_hash_table_remove(mon->dirs, dir->path);
if (g_hash_table_size(mon->dirs) == 0) {

4
util/filemonitor-stub.c
View file

@ -38,7 +38,7 @@ qemu_file_monitor_free(QFileMonitor *mon G_GNUC_UNUSED)
}
int
int64_t
qemu_file_monitor_add_watch(QFileMonitor *mon G_GNUC_UNUSED,
const char *dirpath G_GNUC_UNUSED,
const char *filename G_GNUC_UNUSED,
@ -54,6 +54,6 @@ qemu_file_monitor_add_watch(QFileMonitor *mon G_GNUC_UNUSED,
void
qemu_file_monitor_remove_watch(QFileMonitor *mon G_GNUC_UNUSED,
const char *dirpath G_GNUC_UNUSED,
int id G_GNUC_UNUSED)
int64_t id G_GNUC_UNUSED)
{
}

6
util/trace-events
View file

@ -22,13 +22,13 @@ buffer_move(const char *buf, size_t len, const char *from) "%s: %zd bytes from %
buffer_free(const char *buf, size_t len) "%s: capacity %zd"
# filemonitor-inotify.c
qemu_file_monitor_add_watch(void *mon, const char *dirpath, const char *filename, void *cb, void *opaque, int id) "File monitor %p add watch dir='%s' file='%s' cb=%p opaque=%p id=%u"
qemu_file_monitor_remove_watch(void *mon, const char *dirpath, int id) "File monitor %p remove watch dir='%s' id=%u"
qemu_file_monitor_add_watch(void *mon, const char *dirpath, const char *filename, void *cb, void *opaque, int64_t id) "File monitor %p add watch dir='%s' file='%s' cb=%p opaque=%p id=%" PRId64
qemu_file_monitor_remove_watch(void *mon, const char *dirpath, int64_t id) "File monitor %p remove watch dir='%s' id=%" PRId64
qemu_file_monitor_new(void *mon, int fd) "File monitor %p created fd=%d"
qemu_file_monitor_enable_watch(void *mon, const char *dirpath, int id) "File monitor %p enable watch dir='%s' id=%u"
qemu_file_monitor_disable_watch(void *mon, const char *dirpath, int id) "Fle monitor %p disable watch dir='%s' id=%u"
qemu_file_monitor_event(void *mon, const char *dirpath, const char *filename, int mask, unsigned int id) "File monitor %p event dir='%s' file='%s' mask=0x%x id=%u"
qemu_file_monitor_dispatch(void *mon, const char *dirpath, const char *filename, int ev, void *cb, void *opaque, unsigned int id) "File monitor %p dispatch dir='%s' file='%s' ev=%d cb=%p opaque=%p id=%u"
qemu_file_monitor_dispatch(void *mon, const char *dirpath, const char *filename, int ev, void *cb, void *opaque, int64_t id) "File monitor %p dispatch dir='%s' file='%s' ev=%d cb=%p opaque=%p id=%" PRId64
# qemu-coroutine.c
qemu_aio_coroutine_enter(void *ctx, void *from, void *to, void *opaque) "ctx %p from %p to %p opaque %p"