*
*/
-#include <urcu.h>
-#include <urcu/list.h>
-#include <urcu/rculfhash.h>
-
-#include <fcntl.h>
-#include <inttypes.h>
-#include <pthread.h>
-#include <stdbool.h>
-#include <sys/stat.h>
-#include <sys/types.h>
+#include "fd-tracker.hpp"
+#include "inode.hpp"
#include <common/defaults.hpp>
#include <common/error.hpp>
#include <common/macros.hpp>
#include <common/optional.hpp>
-#include "fd-tracker.hpp"
-#include "inode.hpp"
+#include <fcntl.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <stdbool.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <urcu.h>
+#include <urcu/list.h>
+#include <urcu/rculfhash.h>
/* Tracker lock must be taken by the user. */
-#define TRACKED_COUNT(tracker) \
- (tracker->count.suspendable.active + \
- tracker->count.suspendable.suspended + \
- tracker->count.unsuspendable)
+#define TRACKED_COUNT(tracker) \
+ (tracker->count.suspendable.active + tracker->count.suspendable.suspended + \
+ tracker->count.unsuspendable)
/* Tracker lock must be taken by the user. */
-#define ACTIVE_COUNT(tracker) \
- (tracker->count.suspendable.active + tracker->count.unsuspendable)
+#define ACTIVE_COUNT(tracker) (tracker->count.suspendable.active + tracker->count.unsuspendable)
/* Tracker lock must be taken by the user. */
#define SUSPENDED_COUNT(tracker) (tracker->count.suspendable.suspended)
/* Tracker lock must be taken by the user. */
-#define SUSPENDABLE_COUNT(tracker) \
- (tracker->count.suspendable.active + \
- tracker->count.suspendable.suspended)
+#define SUSPENDABLE_COUNT(tracker) \
+ (tracker->count.suspendable.active + tracker->count.suspendable.suspended)
/* Tracker lock must be taken by the user. */
#define UNSUSPENDABLE_COUNT(tracker) (tracker->count.unsuspendable)
static int match_fd(struct cds_lfht_node *node, const void *key);
static void unsuspendable_fd_destroy(struct unsuspendable_fd *entry);
-static struct unsuspendable_fd *unsuspendable_fd_create(
- const char *name, int fd);
+static struct unsuspendable_fd *unsuspendable_fd_create(const char *name, int fd);
static int open_from_properties(const struct lttng_directory_handle *dir_handle,
- const char *path, struct open_properties *properties);
+ const char *path,
+ struct open_properties *properties);
static void fs_handle_tracked_log(struct fs_handle_tracked *handle);
static int fs_handle_tracked_suspend(struct fs_handle_tracked *handle);
static int fs_handle_tracked_unlink(struct fs_handle *_handle);
static int fs_handle_tracked_close(struct fs_handle *_handle);
-static void fd_tracker_track(
- struct fd_tracker *tracker, struct fs_handle_tracked *handle);
-static void fd_tracker_untrack(
- struct fd_tracker *tracker, struct fs_handle_tracked *handle);
-static int fd_tracker_suspend_handles(
- struct fd_tracker *tracker, unsigned int count);
-static int fd_tracker_restore_handle(
- struct fd_tracker *tracker, struct fs_handle_tracked *handle);
+static void fd_tracker_track(struct fd_tracker *tracker, struct fs_handle_tracked *handle);
+static void fd_tracker_untrack(struct fd_tracker *tracker, struct fs_handle_tracked *handle);
+static int fd_tracker_suspend_handles(struct fd_tracker *tracker, unsigned int count);
+static int fd_tracker_restore_handle(struct fd_tracker *tracker, struct fs_handle_tracked *handle);
/* Match function of the tracker's unsuspendable_fds hash table. */
static int match_fd(struct cds_lfht_node *node, const void *key)
{
- struct unsuspendable_fd *entry = lttng::utils::container_of(
- node, &unsuspendable_fd::tracker_node);
+ struct unsuspendable_fd *entry =
+ lttng::utils::container_of(node, &unsuspendable_fd::tracker_node);
- return hash_match_key_ulong(
- (void *) (unsigned long) entry->fd, (void *) key);
+ return hash_match_key_ulong((void *) (unsigned long) entry->fd, (void *) key);
}
static void delete_unsuspendable_fd(struct rcu_head *head)
{
- struct unsuspendable_fd *fd = caa_container_of(
- head, struct unsuspendable_fd, rcu_head);
+ struct unsuspendable_fd *fd = caa_container_of(head, struct unsuspendable_fd, rcu_head);
free(fd->name);
free(fd);
call_rcu(&entry->rcu_head, delete_unsuspendable_fd);
}
-static struct unsuspendable_fd *unsuspendable_fd_create(
- const char *name, int fd)
+static struct unsuspendable_fd *unsuspendable_fd_create(const char *name, int fd)
{
struct unsuspendable_fd *entry = zmalloc<unsuspendable_fd>();
lttng_inode_borrow_location(handle->inode, NULL, &path);
if (handle->fd >= 0) {
- DBG_NO_LOC(" %s [active, fd %d%s]", path, handle->fd,
- handle->in_use ? ", in use" : "");
+ DBG_NO_LOC(" %s [active, fd %d%s]",
+ path,
+ handle->fd,
+ handle->in_use ? ", in use" : "");
} else {
DBG_NO_LOC(" %s [suspended]", path);
}
const struct lttng_directory_handle *node_directory_handle;
pthread_mutex_lock(&handle->lock);
- lttng_inode_borrow_location(
- handle->inode, &node_directory_handle, &path);
+ lttng_inode_borrow_location(handle->inode, &node_directory_handle, &path);
LTTNG_ASSERT(handle->fd >= 0);
if (handle->in_use) {
/* This handle can't be suspended as it is currently in use. */
goto end;
}
- ret = lttng_directory_handle_stat(
- node_directory_handle, path, &fs_stat);
+ ret = lttng_directory_handle_stat(node_directory_handle, path, &fs_stat);
if (ret) {
- PERROR("Filesystem handle to %s cannot be suspended as stat() failed",
- path);
+ PERROR("Filesystem handle to %s cannot be suspended as stat() failed", path);
ret = -errno;
goto end;
}
if (fs_stat.st_ino != handle->ino) {
/* Don't suspend as the handle would not be restorable. */
- WARN("Filesystem handle to %s cannot be suspended as its inode changed",
- path);
+ WARN("Filesystem handle to %s cannot be suspended as its inode changed", path);
ret = -ENOENT;
goto end;
}
handle->offset = lseek(handle->fd, 0, SEEK_CUR);
if (handle->offset == -1) {
WARN("Filesystem handle to %s cannot be suspended as lseek() failed to sample its current position",
- path);
+ path);
ret = -errno;
goto end;
}
ret = close(handle->fd);
if (ret) {
- PERROR("Filesystem handle to %s cannot be suspended as close() failed",
- path);
+ PERROR("Filesystem handle to %s cannot be suspended as close() failed", path);
ret = -errno;
goto end;
}
DBG("Suspended filesystem handle to %s (fd %i) at position %" PRId64,
- path, handle->fd, handle->offset);
+ path,
+ handle->fd,
+ handle->offset);
handle->fd = -1;
end:
if (ret) {
const char *path;
const struct lttng_directory_handle *node_directory_handle;
- lttng_inode_borrow_location(
- handle->inode, &node_directory_handle, &path);
+ lttng_inode_borrow_location(handle->inode, &node_directory_handle, &path);
LTTNG_ASSERT(handle->fd == -1);
LTTNG_ASSERT(path);
- ret = open_from_properties(
- node_directory_handle, path, &handle->properties);
+ ret = open_from_properties(node_directory_handle, path, &handle->properties);
if (ret < 0) {
- PERROR("Failed to restore filesystem handle to %s, open() failed",
- path);
+ PERROR("Failed to restore filesystem handle to %s, open() failed", path);
ret = -errno;
goto end;
}
ret = lseek(fd, handle->offset, SEEK_SET);
if (ret < 0) {
- PERROR("Failed to restore filesystem handle to %s, lseek() failed",
- path);
+ PERROR("Failed to restore filesystem handle to %s, lseek() failed", path);
ret = -errno;
goto end;
}
DBG("Restored filesystem handle to %s (fd %i) at position %" PRId64,
- path, fd, handle->offset);
+ path,
+ fd,
+ handle->offset);
ret = 0;
handle->fd = fd;
fd = -1;
}
static int open_from_properties(const struct lttng_directory_handle *dir_handle,
- const char *path, struct open_properties *properties)
+ const char *path,
+ struct open_properties *properties)
{
int ret;
* thus it is ignored here.
*/
if ((properties->flags & O_CREAT) && properties->mode.is_set) {
- ret = lttng_directory_handle_open_file(dir_handle, path,
- properties->flags, properties->mode.value);
+ ret = lttng_directory_handle_open_file(
+ dir_handle, path, properties->flags, properties->mode.value);
} else {
- ret = lttng_directory_handle_open_file(dir_handle, path,
- properties->flags, 0);
+ ret = lttng_directory_handle_open_file(dir_handle, path, properties->flags, 0);
}
/*
* Some flags should not be used beyond the initial open() of a
return ret;
}
-struct fd_tracker *fd_tracker_create(const char *unlinked_file_path,
- unsigned int capacity)
+struct fd_tracker *fd_tracker_create(const char *unlinked_file_path, unsigned int capacity)
{
struct fd_tracker *tracker = zmalloc<fd_tracker>();
CDS_INIT_LIST_HEAD(&tracker->active_handles);
CDS_INIT_LIST_HEAD(&tracker->suspended_handles);
tracker->capacity = capacity;
- tracker->unsuspendable_fds = cds_lfht_new(DEFAULT_HT_SIZE, 1, 0,
- CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL);
+ tracker->unsuspendable_fds = cds_lfht_new(
+ DEFAULT_HT_SIZE, 1, 0, CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL);
if (!tracker->unsuspendable_fds) {
ERR("Failed to create fd-tracker's unsuspendable_fds hash table");
goto error;
goto error;
}
- tracker->unlinked_file_pool =
- lttng_unlinked_file_pool_create(unlinked_file_path);
+ tracker->unlinked_file_pool = lttng_unlinked_file_pool_create(unlinked_file_path);
if (!tracker->unlinked_file_pool) {
goto error;
}
DBG("File descriptor tracker created with a limit of %u simultaneously-opened FDs",
- capacity);
+ capacity);
end:
return tracker;
error:
DBG_NO_LOC(" capacity: %u", tracker->capacity);
DBG_NO_LOC(" Tracked suspendable file descriptors");
- cds_list_for_each_entry(
- handle, &tracker->active_handles, handles_list_node) {
+ cds_list_for_each_entry (handle, &tracker->active_handles, handles_list_node) {
fs_handle_tracked_log(handle);
}
- cds_list_for_each_entry(handle, &tracker->suspended_handles,
- handles_list_node) {
+ cds_list_for_each_entry (handle, &tracker->suspended_handles, handles_list_node) {
fs_handle_tracked_log(handle);
}
if (!SUSPENDABLE_COUNT(tracker)) {
DBG_NO_LOC(" Tracked unsuspendable file descriptors");
rcu_read_lock();
- cds_lfht_for_each_entry(tracker->unsuspendable_fds, &iter,
- unsuspendable_fd, tracker_node) {
+ cds_lfht_for_each_entry (
+ tracker->unsuspendable_fds, &iter, unsuspendable_fd, tracker_node) {
DBG_NO_LOC(" %s [active, fd %d]",
- unsuspendable_fd->name ?: "Unnamed",
- unsuspendable_fd->fd);
+ unsuspendable_fd->name ?: "Unnamed",
+ unsuspendable_fd->fd);
}
rcu_read_unlock();
if (!UNSUSPENDABLE_COUNT(tracker)) {
pthread_mutex_lock(&tracker->lock);
if (TRACKED_COUNT(tracker)) {
ERR("A file descriptor leak has been detected: %u tracked file descriptors are still being tracked",
- TRACKED_COUNT(tracker));
+ TRACKED_COUNT(tracker));
pthread_mutex_unlock(&tracker->lock);
fd_tracker_log(tracker);
ret = -1;
}
struct fs_handle *fd_tracker_open_fs_handle(struct fd_tracker *tracker,
- struct lttng_directory_handle *directory,
- const char *path,
- int flags,
- mode_t *mode)
+ struct lttng_directory_handle *directory,
+ const char *path,
+ int flags,
+ mode_t *mode)
{
int ret;
struct fs_handle_tracked *handle = NULL;
struct stat fd_stat;
- struct open_properties properties = {
- .flags = flags,
- .mode = {
- .is_set = !!mode,
- .value = static_cast<mode_t>(mode ? *mode : 0),
- }
- };
+ struct open_properties properties = { .flags = flags,
+ .mode = {
+ .is_set = !!mode,
+ .value =
+ static_cast<mode_t>(mode ? *mode : 0),
+ } };
pthread_mutex_lock(&tracker->lock);
if (ACTIVE_COUNT(tracker) == tracker->capacity) {
* the tracker's capacity.
*/
WARN("Cannot open file system handle, too many unsuspendable file descriptors are opened (%u)",
- tracker->count.unsuspendable);
+ tracker->count.unsuspendable);
goto end;
}
}
if (!handle) {
goto end;
}
- handle->parent = (typeof(handle->parent)) {
+ handle->parent = (typeof(handle->parent)){
.get_fd = fs_handle_tracked_get_fd,
.put_fd = fs_handle_tracked_put_fd,
.unlink = fs_handle_tracked_unlink,
handle->properties = properties;
- handle->inode = lttng_inode_registry_get_inode(tracker->inode_registry,
- directory, path, handle->fd,
- tracker->unlinked_file_pool);
+ handle->inode = lttng_inode_registry_get_inode(
+ tracker->inode_registry, directory, path, handle->fd, tracker->unlinked_file_pool);
if (!handle->inode) {
ERR("Failed to get lttng_inode corresponding to file %s", path);
goto error;
}
/* Caller must hold the tracker's lock. */
-static int fd_tracker_suspend_handles(
- struct fd_tracker *tracker, unsigned int count)
+static int fd_tracker_suspend_handles(struct fd_tracker *tracker, unsigned int count)
{
unsigned int left_to_close = count;
unsigned int attempts_left = tracker->count.suspendable.active;
struct fs_handle_tracked *handle, *tmp;
- cds_list_for_each_entry_safe(handle, tmp, &tracker->active_handles,
- handles_list_node) {
+ cds_list_for_each_entry_safe (handle, tmp, &tracker->active_handles, handles_list_node) {
int ret;
fd_tracker_untrack(tracker, handle);
}
int fd_tracker_open_unsuspendable_fd(struct fd_tracker *tracker,
- int *out_fds,
- const char **names,
- unsigned int fd_count,
- fd_open_cb open,
- void *user_data)
+ int *out_fds,
+ const char **names,
+ unsigned int fd_count,
+ fd_open_cb open,
+ void *user_data)
{
int ret, user_ret, i, fds_to_suspend;
unsigned int active_fds;
pthread_mutex_lock(&tracker->lock);
active_fds = ACTIVE_COUNT(tracker);
- fds_to_suspend = (int) active_fds + (int) fd_count -
- (int) tracker->capacity;
+ fds_to_suspend = (int) active_fds + (int) fd_count - (int) tracker->capacity;
if (fds_to_suspend > 0) {
if (fds_to_suspend <= tracker->count.suspendable.active) {
- ret = fd_tracker_suspend_handles(
- tracker, fds_to_suspend);
+ ret = fd_tracker_suspend_handles(tracker, fds_to_suspend);
if (ret) {
goto end_unlock;
}
* tracker's capacity.
*/
WARN("Cannot open unsuspendable fd, too many unsuspendable file descriptors are opened (%u)",
- tracker->count.unsuspendable);
+ tracker->count.unsuspendable);
ret = -EMFILE;
goto end_unlock;
}
* of unsuspendable fds.
*/
for (i = 0; i < fd_count; i++) {
- struct unsuspendable_fd *entry = unsuspendable_fd_create(
- names ? names[i] : NULL, out_fds[i]);
+ struct unsuspendable_fd *entry =
+ unsuspendable_fd_create(names ? names[i] : NULL, out_fds[i]);
if (!entry) {
ret = -1;
struct unsuspendable_fd *entry = entries[i];
node = cds_lfht_add_unique(tracker->unsuspendable_fds,
- hash_key_ulong((void *) (unsigned long)
- out_fds[i],
- seed.value),
- match_fd, (void *) (unsigned long) out_fds[i],
- &entry->tracker_node);
+ hash_key_ulong((void *) (unsigned long) out_fds[i],
+ seed.value),
+ match_fd,
+ (void *) (unsigned long) out_fds[i],
+ &entry->tracker_node);
if (node != &entry->tracker_node) {
ret = -EEXIST;
}
int fd_tracker_close_unsuspendable_fd(struct fd_tracker *tracker,
- int *fds_in,
- unsigned int fd_count,
- fd_close_cb close,
- void *user_data)
+ int *fds_in,
+ unsigned int fd_count,
+ fd_close_cb close,
+ void *user_data)
{
int i, ret, user_ret;
int *fds = NULL;
struct unsuspendable_fd *entry;
cds_lfht_lookup(tracker->unsuspendable_fds,
- hash_key_ulong((void *) (unsigned long) fds[i],
- seed.value),
- match_fd, (void *) (unsigned long) fds[i],
+ hash_key_ulong((void *) (unsigned long) fds[i], seed.value),
+ match_fd,
+ (void *) (unsigned long) fds[i],
&iter);
node = cds_lfht_iter_get_node(&iter);
if (!node) {
/* Unknown file descriptor. */
WARN("Untracked file descriptor %d passed to fd_tracker_close_unsuspendable_fd()",
- fds[i]);
+ fds[i]);
ret = -EINVAL;
goto end_unlock;
}
- entry = lttng::utils::container_of(
- node, &unsuspendable_fd::tracker_node);
+ entry = lttng::utils::container_of(node, &unsuspendable_fd::tracker_node);
cds_lfht_del(tracker->unsuspendable_fds, node);
unsuspendable_fd_destroy(entry);
}
/* Caller must have taken the tracker's and handle's locks. */
-static void fd_tracker_track(
- struct fd_tracker *tracker, struct fs_handle_tracked *handle)
+static void fd_tracker_track(struct fd_tracker *tracker, struct fs_handle_tracked *handle)
{
if (handle->fd >= 0) {
tracker->count.suspendable.active++;
- cds_list_add_tail(&handle->handles_list_node,
- &tracker->active_handles);
+ cds_list_add_tail(&handle->handles_list_node, &tracker->active_handles);
} else {
tracker->count.suspendable.suspended++;
- cds_list_add_tail(&handle->handles_list_node,
- &tracker->suspended_handles);
+ cds_list_add_tail(&handle->handles_list_node, &tracker->suspended_handles);
}
}
/* Caller must have taken the tracker's and handle's locks. */
-static void fd_tracker_untrack(
- struct fd_tracker *tracker, struct fs_handle_tracked *handle)
+static void fd_tracker_untrack(struct fd_tracker *tracker, struct fs_handle_tracked *handle)
{
if (handle->fd >= 0) {
tracker->count.suspendable.active--;
}
/* Caller must have taken the tracker's and handle's locks. */
-static int fd_tracker_restore_handle(
- struct fd_tracker *tracker, struct fs_handle_tracked *handle)
+static int fd_tracker_restore_handle(struct fd_tracker *tracker, struct fs_handle_tracked *handle)
{
int ret;
{
int ret;
struct fs_handle_tracked *handle =
- lttng::utils::container_of(_handle, &fs_handle_tracked::parent);
+ lttng::utils::container_of(_handle, &fs_handle_tracked::parent);
/*
* TODO This should be optimized as it is a fairly hot path.
static void fs_handle_tracked_put_fd(struct fs_handle *_handle)
{
struct fs_handle_tracked *handle =
- lttng::utils::container_of(_handle, &fs_handle_tracked::parent);
+ lttng::utils::container_of(_handle, &fs_handle_tracked::parent);
pthread_mutex_lock(&handle->lock);
handle->in_use = false;
{
int ret;
struct fs_handle_tracked *handle =
- lttng::utils::container_of(_handle, &fs_handle_tracked::parent);
+ lttng::utils::container_of(_handle, &fs_handle_tracked::parent);
pthread_mutex_lock(&handle->tracker->lock);
pthread_mutex_lock(&handle->lock);
int ret = 0;
const char *path = NULL;
struct fs_handle_tracked *handle =
- lttng::utils::container_of(_handle, &fs_handle_tracked::parent);
+ lttng::utils::container_of(_handle, &fs_handle_tracked::parent);
struct lttng_directory_handle *inode_directory_handle = NULL;
if (!handle) {
* enough to not attempt to recursively acquire the tracker's
* lock twice.
*/
- inode_directory_handle =
- lttng_inode_get_location_directory_handle(
- handle->inode);
+ inode_directory_handle = lttng_inode_get_location_directory_handle(handle->inode);
}
fd_tracker_untrack(handle->tracker, handle);
if (handle->fd >= 0) {
*/
if (close(handle->fd)) {
PERROR("Failed to close the file descriptor (%d) of fs handle to %s, close() returned",
- handle->fd, path ? path : "Unknown");
+ handle->fd,
+ path ? path : "Unknown");
}
handle->fd = -1;
}
projects / lttng-tools.git / blobdiff