systemd/0014-journald-with-journaling-FS.patch

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---
src/journal/journald-server.c | 29 +++++++++++++++++++++++++++--
1 file changed, 27 insertions(+), 2 deletions(-)
Index: systemd-218/src/journal/journald-server.c
===================================================================
--- systemd-218.orig/src/journal/journald-server.c
+++ systemd-218/src/journal/journald-server.c
@@ -21,6 +21,7 @@
#include <sys/signalfd.h>
#include <sys/ioctl.h>
+#include <linux/fs.h>
#include <linux/sockios.h>
#include <sys/statvfs.h>
#include <sys/mman.h>
@@ -921,7 +922,7 @@ finish:
static int system_journal_open(Server *s, bool flush_requested) {
- int r;
+ int r, fd;
char *fn;
sd_id128_t machine;
char ids[33];
@@ -947,7 +948,31 @@ static int system_journal_open(Server *s
(void) mkdir("/var/log/journal/", 0755);
fn = strappenda("/var/log/journal/", ids);
- (void) mkdir(fn, 0755);
+ (void)mkdir(fn, 0755);
+
+ /*
+ * On journaling and/or compressing file systems avoid doubling the
+ * efforts for the system, that is set NOCOW and NOCOMP inode flags.
+ * Check for every single flag as otherwise some of the file systems
+ * may return EOPNOTSUPP on one unkown flag (like BtrFS does).
+ */
+ if ((fd = open(fn, O_DIRECTORY)) >= 0) {
+ long flags;
+ if (ioctl(fd, FS_IOC_GETFLAGS, &flags) == 0) {
+ int old = flags;
+ if (!(flags&FS_NOATIME_FL) && ioctl(fd, FS_IOC_SETFLAGS, flags|FS_NOATIME_FL) == 0)
+ flags |= FS_NOATIME_FL;
+ if (!(flags&FS_NOCOW_FL) && ioctl(fd, FS_IOC_SETFLAGS, flags|FS_NOCOW_FL) == 0)
+ flags |= FS_NOCOW_FL;
+ if (!(flags&FS_NOCOMP_FL) && s->compress) {
+ flags &= ~FS_COMPR_FL;
+ flags |= FS_NOCOMP_FL;
+ }
+ if (old != flags)
+ ioctl(fd, FS_IOC_SETFLAGS, flags);
+ }
+ close(fd);
+ }
fn = strappenda(fn, "/system.journal");
r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &s->system_journal);