diff options
Diffstat (limited to 'libdiskfs/node-times.c')
| -rw-r--r-- | libdiskfs/node-times.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/libdiskfs/node-times.c b/libdiskfs/node-times.c index 9a6c8dd9..05f558be 100644 --- a/libdiskfs/node-times.c +++ b/libdiskfs/node-times.c @@ -24,12 +24,45 @@ #include "priv.h" #include <maptime.h> +/* If the disk is not readonly and noatime is not set, then check relatime + conditions: if either `np->dn_stat.st_mtim.tv_sec' or + `np->dn_stat.st_ctim.tv_sec' is greater than `np->dn_stat.st_atim.tv_sec', + or if the atime is greater than 24 hours old, return true. + */ +int +atime_should_update (struct node *np) +{ + struct timeval t; + + if (_diskfs_noatime) + return 0; + + if (_diskfs_relatime) + { + /* Update atime if mtime is younger than atime. */ + if (np->dn_stat.st_mtim.tv_sec > np->dn_stat.st_atim.tv_sec) + return 1; + /* Update atime if ctime is younger than atime. */ + if (np->dn_stat.st_ctim.tv_sec > np->dn_stat.st_atim.tv_sec) + return 1; + /* Update atime if current atime is more than 24 hours old. */ + maptime_read (diskfs_mtime, &t); + if ((long)(t.tv_sec - np->dn_stat.st_atim.tv_sec) >= 24 * 60 * 60) + return 1; + return 0; + } + + return 1; /* strictatime */ +} + /* If disk is not readonly and the noatime option is not enabled, set - NP->dn_set_atime. */ + NP->dn_set_atime. If relatime is enabled, only set NP->dn_set_atime + if the atime has not been updated today, or if ctime or mtime are + more recent than atime */ void diskfs_set_node_atime (struct node *np) { - if (!_diskfs_noatime && !diskfs_check_readonly ()) + if (!diskfs_check_readonly () && atime_should_update (np)) np->dn_set_atime = 1; } |