#include <sys/ioctl.h>
#include <sys/vfs.h>
#include <getopt.h>
+#include <sys/inotify.h>
#include "missing.h"
#include "util.h"
*
* - detect ssd on btrfs/lvm...
* - read ahead directories
- * - sd_readahead_cancel
* - gzip?
* - remount rw?
+ * - handle files where nothing is in mincore
* - does ioprio_set work with fadvise()?
*/
static int collect(const char *root) {
enum {
- FD_FANOTIFY,
+ FD_FANOTIFY, /* Get the actual fs events */
FD_SIGNAL,
+ FD_INOTIFY, /* We get notifications to quit early via this fd */
_FD_MAX
};
struct pollfd pollfd[_FD_MAX];
- int fanotify_fd = -1, signal_fd = -1, r = 0;
+ int fanotify_fd = -1, signal_fd = -1, inotify_fd = -1, r = 0;
pid_t my_pid;
Hashmap *files = NULL;
Iterator i;
goto finish;
}
+ if ((inotify_fd = open_inotify()) < 0) {
+ r = inotify_fd;
+ goto finish;
+ }
+
not_after = now(CLOCK_MONOTONIC) + arg_timeout;
my_pid = getpid();
pollfd[FD_FANOTIFY].events = POLLIN;
pollfd[FD_SIGNAL].fd = signal_fd;
pollfd[FD_SIGNAL].events = POLLIN;
+ pollfd[FD_INOTIFY].fd = inotify_fd;
+ pollfd[FD_INOTIFY].events = POLLIN;
sd_notify(0,
"READY=1\n"
log_debug("Collecting...");
+ if (access("/dev/.systemd/readahead/cancel", F_OK) >= 0) {
+ log_debug("Collection canceled");
+ r = -ECANCELED;
+ goto finish;
+ }
+
+ if (access("/dev/.systemd/readahead/done", F_OK) >= 0) {
+ log_debug("Got termination request");
+ goto done;
+ }
+
for (;;) {
union {
struct fanotify_event_metadata metadata;
goto finish;
}
- if (pollfd[FD_SIGNAL].revents != 0)
- break;
-
if (h == 0) {
log_debug("Reached maximum collection time, ending collection.");
break;
}
+ if (pollfd[FD_SIGNAL].revents) {
+ log_debug("Got signal.");
+ break;
+ }
+
+ if (pollfd[FD_INOTIFY].revents) {
+ uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX];
+ struct inotify_event *e;
+
+ if ((n = read(inotify_fd, &inotify_buffer, sizeof(inotify_buffer))) < 0) {
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+
+ log_error("Failed to read inotify event: %m");
+ r = -errno;
+ goto finish;
+ }
+
+ e = (struct inotify_event*) inotify_buffer;
+ while (n > 0) {
+ size_t step;
+
+ if ((e->mask & IN_CREATE) && streq(e->name, "cancel")) {
+ log_debug("Collection canceled");
+ r = -ECANCELED;
+ goto finish;
+ }
+
+ if ((e->mask & IN_CREATE) && streq(e->name, "done")) {
+ log_debug("Got termination request");
+ goto done;
+ }
+
+ step = sizeof(struct inotify_event) + e->len;
+ assert(step <= (size_t) n);
+
+ e = (struct inotify_event*) ((uint8_t*) e + step);
+ n -= step;
+ }
+ }
+
if ((n = read(fanotify_fd, &data, sizeof(data))) < 0) {
if (errno == EINTR || errno == EAGAIN)
}
}
+done:
if (fanotify_fd >= 0) {
close_nointr_nofail(fanotify_fd);
fanotify_fd = -1;
log_debug("Writing Pack File...");
- on_ssd = fs_on_ssd(root);
+ on_ssd = fs_on_ssd(root) == 0;
log_debug("On SSD: %s", yes_no(on_ssd));
on_btrfs = statfs(root, &sfs) >= 0 && sfs.f_type == BTRFS_SUPER_MAGIC;
if (signal_fd >= 0)
close_nointr_nofail(signal_fd);
+ if (inotify_fd >= 0)
+ close_nointr_nofail(inotify_fd);
+
if (pack) {
fclose(pack);
unlink(pack_fn_new);
free(pack_fn);
while ((p = hashmap_steal_first_key(files)))
- free(q);
+ free(p);
hashmap_free(files);