udev: tag virtio serial ports with systemd by default

[elogind.git] / src / readahead-replay.c

diff --git a/src/readahead-replay.c b/src/readahead-replay.c
index f0710e5ddf7ef1cb7d1cac95b5dcef88179c4940..0b84528b0ee3d27dbae8cc8ccaa75511e6322200 100644 (file)
--- a/src/readahead-replay.c
+++ b/src/readahead-replay.c
@@ -44,6 +44,8 @@
 
 static off_t arg_file_size_max = READAHEAD_FILE_SIZE_MAX;
 
+static ReadaheadShared *shared = NULL;
+
 static int unpack_file(FILE *pack) {
         char fn[PATH_MAX];
         int r = 0, fd = -1;
@@ -58,9 +60,12 @@ static int unpack_file(FILE *pack) {
         char_array_0(fn);
         truncate_nl(fn);
 
-        if ((fd = open(fn, O_RDONLY|O_CLOEXEC|O_NOATIME|O_NOCTTY|O_NOFOLLOW)) < 0)
-                log_warning("open(%s) failed: %m", fn);
-        else if (file_verify(fd, fn, arg_file_size_max, &st) <= 0) {
+        if ((fd = open(fn, O_RDONLY|O_CLOEXEC|O_NOATIME|O_NOCTTY|O_NOFOLLOW)) < 0) {
+
+                if (errno != ENOENT && errno != EPERM && errno != EACCES)
+                        log_warning("open(%s) failed: %m", fn);
+
+        } else if (file_verify(fd, fn, arg_file_size_max, &st) <= 0) {
                 close_nointr_nofail(fd);
                 fd = -1;
         }
@@ -89,7 +94,7 @@ static int unpack_file(FILE *pack) {
                 any = true;
 
                 if (fd >= 0)
-                        if (posix_fadvise(fd, b * PAGE_SIZE, (c - b) * PAGE_SIZE, POSIX_FADV_WILLNEED) < 0) {
+                        if (posix_fadvise(fd, b * page_size(), (c - b) * page_size(), POSIX_FADV_WILLNEED) < 0) {
                                 log_warning("posix_fadvise() failed: %m");
                                 goto finish;
                         }
@@ -117,7 +122,8 @@ static int replay(const char *root) {
         FILE *pack = NULL;
         char line[LINE_MAX];
         int r = 0;
-        char *pack_fn = NULL, c;
+        char *pack_fn = NULL;
+        int c;
         bool on_ssd, ready = false;
         int prio;
         int inotify_fd = -1;
@@ -125,6 +131,7 @@ static int replay(const char *root) {
         assert(root);
 
         write_one_line_file("/proc/self/oom_score_adj", "1000");
+        bump_request_nr(root);
 
         if (asprintf(&pack_fn, "%s/.readahead", root) < 0) {
                 log_error("Out of memory");
@@ -133,7 +140,7 @@ static int replay(const char *root) {
         }
 
         if ((!(pack = fopen(pack_fn, "re")))) {
-                if (errno == -ENOENT)
+                if (errno == ENOENT)
                         log_debug("No pack file found.");
                 else {
                         log_error("Failed to open pack file: %m");
@@ -143,6 +150,8 @@ static int replay(const char *root) {
                 goto finish;
         }
 
+        posix_fadvise(fileno(pack), 0, 0, POSIX_FADV_WILLNEED);
+
         if ((inotify_fd = open_inotify()) < 0) {
                 r = inotify_fd;
                 goto finish;
@@ -184,7 +193,7 @@ static int replay(const char *root) {
 
         log_debug("Replaying...");
 
-        if (access("/dev/.systemd/readahead/noreplay", F_OK) >= 0) {
+        if (access("/run/systemd/readahead/noreplay", F_OK) >= 0) {
                 log_debug("Got termination request");
                 goto done;
         }
@@ -325,6 +334,7 @@ static int parse_argv(int argc, char *argv[]) {
 
 int main(int argc, char*argv[]) {
         int r;
+        const char *root;
 
         log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
         log_parse_environment();
@@ -333,12 +343,25 @@ int main(int argc, char*argv[]) {
         if ((r = parse_argv(argc, argv)) <= 0)
                 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 
+        root = optind < argc ? argv[optind] : "/";
+
         if (!enough_ram()) {
                 log_info("Disabling readahead replay due to low memory.");
                 return 0;
         }
 
-        if (replay(optind < argc ? argv[optind] : "/") < 0)
+        if (detect_virtualization(NULL) > 0) {
+                log_info("Disabling readahead replay due to execution in virtualized environment.");
+                return 0;
+        }
+
+        if (!(shared = shared_get()))
+                return 1;
+
+        shared->replay = getpid();
+        __sync_synchronize();
+
+        if (replay(root) < 0)
                 return 1;
 
         return 0;