git: c849eb8f1925 - main - nullfs: Add the vfs.nullfs.cache_nodes sysctl to control nocache default
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Date: Thu, 07 Mar 2024 15:31:03 UTC
The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=c849eb8f1925f95ebfb8dbbe00672d902486a973 commit c849eb8f1925f95ebfb8dbbe00672d902486a973 Author: Seigo Tanimura <seigo.tanimura@gmail.com> AuthorDate: 2024-03-04 13:50:25 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2024-03-07 15:19:18 +0000 nullfs: Add the vfs.nullfs.cache_nodes sysctl to control nocache default Differential revision: https://reviews.freebsd.org/D44217 MFC after: 1 week --- sys/fs/nullfs/null_vfsops.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/sys/fs/nullfs/null_vfsops.c b/sys/fs/nullfs/null_vfsops.c index 2fa592ebbe9c..04a3817a828d 100644 --- a/sys/fs/nullfs/null_vfsops.c +++ b/sys/fs/nullfs/null_vfsops.c @@ -46,6 +46,7 @@ #include <sys/mount.h> #include <sys/namei.h> #include <sys/proc.h> +#include <sys/sysctl.h> #include <sys/vnode.h> #include <sys/jail.h> @@ -63,6 +64,13 @@ static vfs_unmount_t nullfs_unmount; static vfs_vget_t nullfs_vget; static vfs_extattrctl_t nullfs_extattrctl; +SYSCTL_NODE(_vfs, OID_AUTO, nullfs, CTLFLAG_RW, 0, "nullfs"); + +static bool null_cache_vnodes = true; +SYSCTL_BOOL(_vfs_nullfs, OID_AUTO, cache_vnodes, CTLFLAG_RWTUN, + &null_cache_vnodes, 0, + "cache free nullfs vnodes"); + /* * Mount null layer */ @@ -198,7 +206,8 @@ nullfs_mount(struct mount *mp) } xmp->nullm_flags |= NULLM_CACHE; - if (vfs_getopt(mp->mnt_optnew, "nocache", NULL, NULL) == 0 || + 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;