d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Pass MNTK_NO_IOPF and MNTK_UNMAPPED_BUFS flags from the lower

Browse Source 
filesystem to the nullfs mount.

MNTK_NO_IOPF must be present on the nullfs struct mount so that struct
file fo_read and fo_write fops operate in the mode requested by the
lower mount.

MNTK_UNMAPPED_BUFS allows VOP_GETPAGES() to use unmapped buffers.  It
does not matter for VOP_GETPAGES() calls from vm_fault() since handle
of the vm_object always points to the lower vnode.  But it may be
useful for other situations where VOP_GETPAGES() is used.

Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
This commit is contained in:
Konstantin Belousov 2016-03-04 17:24:28 +00:00
parent 6cb64f8497
commit f36aa2b792
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sys/fs/nullfs/null_vfsops.c
View File

@ -199,7 +199,7 @@ nullfs_mount(struct mount *mp)
}
mp->mnt_kern_flag |= MNTK_LOOKUP_EXCL_DOTDOT;
mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag &
MNTK_USES_BCACHE;
(MNTK_USES_BCACHE | MNTK_NO_IOPF | MNTK_UNMAPPED_BUFS);
MNT_IUNLOCK(mp);
mp->mnt_data = xmp;
vfs_getnewfsid(mp);