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| author | kib <kib@FreeBSD.org> | 2015-01-28 10:37:23 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2015-01-28 10:37:23 +0000 |
| commit | 19abfd469885b67c5047dba2d04b3dc3b921f0a3 (patch) | |
| tree | 8e9a74f326054d217c814329e5be52b441d536f0 /sys/fs/tmpfs/tmpfs_subr.c | |
| parent | 53810519b4c0da8a9f8bcdafa10465c8d423a70c (diff) | |
| download | FreeBSD-src-19abfd469885b67c5047dba2d04b3dc3b921f0a3.zip FreeBSD-src-19abfd469885b67c5047dba2d04b3dc3b921f0a3.tar.gz | |
Update mtime for tmpfs files modified through memory mapping. Similar
to UFS, perform updates during syncer scans, which in particular means
that tmpfs now performs scan on sync. Also, this means that a mtime
update may be delayed up to 30 seconds after the write.
The vm_object' OBJ_TMPFS_DIRTY flag for tmpfs swap object is similar
to the OBJ_MIGHTBEDIRTY flag for the vnode object, it indicates that
object could have been dirtied. Adapt fast page fault handler and
vm_object_set_writeable_dirty() to handle OBJ_TMPFS_NODE same as
OBJT_VNODE.
Reported by: Ronald Klop <ronald-lists@klop.ws>
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Diffstat (limited to 'sys/fs/tmpfs/tmpfs_subr.c')
| -rw-r--r-- | sys/fs/tmpfs/tmpfs_subr.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/sys/fs/tmpfs/tmpfs_subr.c b/sys/fs/tmpfs/tmpfs_subr.c index d0d9a15..c1930f1 100644 --- a/sys/fs/tmpfs/tmpfs_subr.c +++ b/sys/fs/tmpfs/tmpfs_subr.c @@ -1415,6 +1415,31 @@ retry: return (0); } +void +tmpfs_check_mtime(struct vnode *vp) +{ + struct tmpfs_node *node; + struct vm_object *obj; + + ASSERT_VOP_ELOCKED(vp, "check_mtime"); + if (vp->v_type != VREG) + return; + node = VP_TO_TMPFS_NODE(vp); + obj = vp->v_object; + KASSERT((obj->flags & (OBJ_TMPFS_NODE | OBJ_TMPFS)) == + (OBJ_TMPFS_NODE | OBJ_TMPFS), ("non-tmpfs obj")); + /* unlocked read */ + if ((obj->flags & OBJ_TMPFS_DIRTY) != 0) { + VM_OBJECT_WLOCK(obj); + if ((obj->flags & OBJ_TMPFS_DIRTY) != 0) { + obj->flags &= ~OBJ_TMPFS_DIRTY; + node = VP_TO_TMPFS_NODE(vp); + node->tn_status |= TMPFS_NODE_MODIFIED; + } + VM_OBJECT_WUNLOCK(obj); + } +} + /* * Change flags of the given vnode. * Caller should execute tmpfs_update on vp after a successful execution. |
