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nullfs: add -o cache

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(cherry picked from commit 8921216dbe)
This commit is contained in:
Konstantin Belousov 2024-03-08 20:26:02 +02:00
parent a79bb016d9
commit adcb01c08e
1 changed files with 9 additions and 6 deletions
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15
sys/fs/nullfs/null_vfsops.c
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@ -209,12 +209,15 @@ nullfs_mount(struct mount *mp)
MNT_IUNLOCK(mp);
}
xmp->nullm_flags |= NULLM_CACHE;
if (!null_cache_vnodes ||
vfs_getopt(mp->mnt_optnew, "nocache", NULL, NULL) == 0 ||
(xmp->nullm_vfs->mnt_kern_flag & MNTK_NULL_NOCACHE) != 0)
xmp->nullm_flags &= ~NULLM_CACHE;
if (vfs_getopt(mp->mnt_optnew, "cache", NULL, NULL) == 0) {
xmp->nullm_flags |= NULLM_CACHE;
} else if (vfs_getopt(mp->mnt_optnew, "nocache", NULL, NULL) == 0) {
;
} else if (null_cache_vnodes &&
(xmp->nullm_vfs->mnt_kern_flag & MNTK_NULL_NOCACHE) == 0) {
xmp->nullm_flags |= NULLM_CACHE;
}
if ((xmp->nullm_flags & NULLM_CACHE) != 0) {
vfs_register_for_notification(xmp->nullm_vfs, mp,
&xmp->notify_node);