systemctl: fix corrupted output of units

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

diff --git a/src/readahead-collect.c b/src/readahead-collect.c
index 5c09f7a9e1df140b29f61585506476cacf7bbc19..eac11e7e5c160477f6c8ba61fd4d2394a67b6b97 100644 (file)
--- a/src/readahead-collect.c
+++ b/src/readahead-collect.c
@@ -49,6 +49,7 @@
 #include "sd-daemon.h"
 #include "ioprio.h"
 #include "readahead-common.h"
+#include "virt.h"
 
 /* fixme:
  *
@@ -92,6 +93,13 @@ static int pack_file(FILE *pack, const char *fn, bool on_btrfs) {
         assert(fn);
 
         if ((fd = open(fn, O_RDONLY|O_CLOEXEC|O_NOATIME|O_NOCTTY|O_NOFOLLOW)) < 0) {
+
+                if (errno == ENOENT)
+                        return 0;
+
+                if (errno == EPERM || errno == EACCES)
+                        return 0;
+
                 log_warning("open(%s) failed: %m", fn);
                 r = -errno;
                 goto finish;
@@ -112,9 +120,10 @@ static int pack_file(FILE *pack, const char *fn, bool on_btrfs) {
                 goto finish;
         }
 
-        pages = l / PAGE_SIZE;
+        pages = l / page_size();
 
         vec = alloca(pages);
+        memset(vec, 0, pages);
         if (mincore(start, l, vec) < 0) {
                 log_warning("mincore(%s) failed: %m", fn);
                 r = -errno;
@@ -282,13 +291,13 @@ static int collect(const char *root) {
 
         log_debug("Collecting...");
 
-        if (access("/dev/.systemd/readahead/cancel", F_OK) >= 0) {
+        if (access("/run/systemd/readahead/cancel", F_OK) >= 0) {
                 log_debug("Collection canceled");
                 r = -ECANCELED;
                 goto finish;
         }
 
-        if (access("/dev/.systemd/readahead/done", F_OK) >= 0) {
+        if (access("/run/systemd/readahead/done", F_OK) >= 0) {
                 log_debug("Got termination request");
                 goto done;
         }
@@ -375,6 +384,16 @@ static int collect(const char *root) {
                         if (errno == EINTR || errno == EAGAIN)
                                 continue;
 
+                        /* fanotify sometimes returns EACCES on read()
+                         * where it shouldn't. For now let's just
+                         * ignore it here (which is safe), but
+                         * eventually this should be
+                         * dropped when the kernel is fixed.
+                         *
+                         * https://bugzilla.redhat.com/show_bug.cgi?id=707577 */
+                        if (errno == EACCES)
+                                continue;
+
                         log_error("Failed to read event: %m");
                         r = -errno;
                         goto finish;
@@ -398,8 +417,8 @@ static int collect(const char *root) {
                         char_array_0(fn);
 
                         if ((k = readlink_malloc(fn, &p)) >= 0) {
-
                                 if (startswith(p, "/tmp") ||
+                                    endswith(p, " (deleted)") ||
                                     hashmap_get(files, p))
                                         /* Not interesting, or
                                          * already read */
@@ -435,7 +454,7 @@ done:
         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;
+        on_btrfs = statfs(root, &sfs) >= 0 && (long) sfs.f_type == (long) BTRFS_SUPER_MAGIC;
         log_debug("On btrfs: %s", yes_no(on_btrfs));
 
         asprintf(&pack_fn, "%s/.readahead", root);
@@ -632,26 +651,41 @@ 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();
         log_open();
 
+        umask(0022);
+
         if ((r = parse_argv(argc, argv)) <= 0)
                 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 
+        root = optind < argc ? argv[optind] : "/";
+
+        if (fs_on_read_only(root) > 0) {
+                log_info("Disabling readahead collector due to read-only media.");
+                return 0;
+        }
+
         if (!enough_ram()) {
                 log_info("Disabling readahead collector due to low memory.");
                 return 0;
         }
 
+        if (detect_virtualization(NULL) > 0) {
+                log_info("Disabling readahead collector due to execution in virtualized environment.");
+                return 0;
+        }
+
         if (!(shared = shared_get()))
                 return 1;
 
         shared->collect = getpid();
         __sync_synchronize();
 
-        if (collect(optind < argc ? argv[optind] : "/") < 0)
+        if (collect(root) < 0)
                 return 1;
 
         return 0;