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Make zfs mount according to relatime config in dataset 

Also enable lazytime in mount.zfs

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #4482
This commit is contained in:
Chunwei Chen 2016-04-01 13:12:06 -07:00 committed by Brian Behlendorf
parent 704cd0758a
commit 6760077194
3 changed files with 15 additions and 3 deletions
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5
cmd/mount_zfs/mount_zfs.c
View File

@ -78,7 +78,10 @@ static const option_map_t option_map[] = {
{ MNTOPT_RELATIME, MS_RELATIME, ZS_COMMENT },
#endif
#ifdef MS_STRICTATIME
{ MNTOPT_DFRATIME, MS_STRICTATIME, ZS_COMMENT },
{ MNTOPT_STRICTATIME, MS_STRICTATIME, ZS_COMMENT },
#endif
#ifdef MS_LAZYTIME
{ MNTOPT_LAZYTIME, MS_LAZYTIME, ZS_COMMENT },
#endif
{ MNTOPT_CONTEXT, MS_COMMENT, ZS_COMMENT },
{ MNTOPT_FSCONTEXT, MS_COMMENT, ZS_COMMENT },

5
include/sys/mntent.h
View File

@ -68,8 +68,9 @@
#define MNTOPT_NOFAIL "nofail" /* no failure */
#define MNTOPT_RELATIME "relatime" /* allow relative time updates */
#define MNTOPT_NORELATIME "norelatime" /* do not allow relative time updates */
#define MNTOPT_DFRATIME "strictatime" /* Deferred access time updates */
#define MNTOPT_NODFRATIME "nostrictatime" /* No Deferred access time updates */
#define MNTOPT_STRICTATIME "strictatime" /* strict access time updates */
#define MNTOPT_NOSTRICTATIME "nostrictatime" /* No strict access time updates */
#define MNTOPT_LAZYTIME "lazytime" /* Defer access time writing */
#define MNTOPT_SETUID "suid" /* Both setuid and devices allowed */
#define MNTOPT_NOSETUID "nosuid" /* Neither setuid nor devices allowed */
#define MNTOPT_OWNER "owner" /* allow owner mount */

8
lib/libzfs/libzfs_mount.c
View File

@ -365,6 +365,14 @@ zfs_add_options(zfs_handle_t *zhp, char *options, int len)
error = zfs_add_option(zhp, options, len,
ZFS_PROP_ATIME, MNTOPT_ATIME, MNTOPT_NOATIME);
/*
* don't add relatime/strictatime when atime=off, otherwise strictatime
* will force atime=on
*/
if (strstr(options, MNTOPT_NOATIME) == NULL) {
error = zfs_add_option(zhp, options, len,
ZFS_PROP_RELATIME, MNTOPT_RELATIME, MNTOPT_STRICTATIME);
}
error = error ? error : zfs_add_option(zhp, options, len,
ZFS_PROP_DEVICES, MNTOPT_DEVICES, MNTOPT_NODEVICES);
error = error ? error : zfs_add_option(zhp, options, len,