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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2013-04-23 19:05:43 -0400
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2013-04-24 00:25:04 -0400
commit90ae6c0b822bbfd433c801d7945cadcabd1bc1c3 (patch)
tree6dbb5dd0008818dac95afedb346d7ae94517c468 /src
parentef42202ac8ed27e7ff1fc90ef8bc2590046dff25 (diff)
readahead: be more verbose about creation failures
systemd-readahead reports "Failed to create shared memory segment: No such file or directory", but it's unclear how it can happen. Be more verbose about failures.
Diffstat (limited to 'src')
-rw-r--r--src/readahead/readahead-common.c35
1 files changed, 19 insertions, 16 deletions
diff --git a/src/readahead/readahead-common.c b/src/readahead/readahead-common.c
index ed81c14d89..a234a89954 100644
--- a/src/readahead/readahead-common.c
+++ b/src/readahead/readahead-common.c
@@ -216,16 +216,23 @@ bool enough_ram(void) {
return si.totalram > 127 * 1024*1024 / si.mem_unit;
}
+static void mkdirs(void) {
+ if (mkdir("/run/systemd", 0755) && errno != EEXIST)
+ log_warning("Failed to create /run/systemd: %m");
+ if (mkdir("/run/systemd/readahead", 0755) && errno != EEXIST)
+ log_warning("Failed to create /run/systemd: %m");
+}
+
int open_inotify(void) {
int fd;
- if ((fd = inotify_init1(IN_CLOEXEC|IN_NONBLOCK)) < 0) {
+ fd = inotify_init1(IN_CLOEXEC|IN_NONBLOCK);
+ if (fd < 0) {
log_error("Failed to create inotify handle: %m");
return -errno;
}
- mkdir("/run/systemd", 0755);
- mkdir("/run/systemd/readahead", 0755);
+ mkdirs();
if (inotify_add_watch(fd, "/run/systemd/readahead", IN_CREATE) < 0) {
log_error("Failed to watch /run/systemd/readahead: %m");
@@ -237,32 +244,28 @@ int open_inotify(void) {
}
ReadaheadShared *shared_get(void) {
- int fd;
+ int _cleanup_close_ fd = -1;
ReadaheadShared *m = NULL;
- mkdir("/run/systemd", 0755);
- mkdir("/run/systemd/readahead", 0755);
+ mkdirs();
- if ((fd = open("/run/systemd/readahead/shared", O_CREAT|O_RDWR|O_CLOEXEC, 0644)) < 0) {
+ fd = open("/run/systemd/readahead/shared", O_CREAT|O_RDWR|O_CLOEXEC, 0644);
+ if (fd < 0) {
log_error("Failed to create shared memory segment: %m");
- goto finish;
+ return NULL;
}
if (ftruncate(fd, sizeof(ReadaheadShared)) < 0) {
log_error("Failed to truncate shared memory segment: %m");
- goto finish;
+ return NULL;
}
- if ((m = mmap(NULL, sizeof(ReadaheadShared), PROT_WRITE|PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) {
+ m = mmap(NULL, sizeof(ReadaheadShared), PROT_WRITE|PROT_READ, MAP_SHARED, fd, 0);
+ if (m == MAP_FAILED) {
log_error("Failed to mmap shared memory segment: %m");
- m = NULL;
- goto finish;
+ return NULL;
}
-finish:
- if (fd >= 0)
- close_nointr_nofail(fd);
-
return m;
}