diff options
Diffstat (limited to 'sys/kern/vfs_default.c')
| -rw-r--r-- | sys/kern/vfs_default.c | 49 |
1 files changed, 44 insertions, 5 deletions
diff --git a/sys/kern/vfs_default.c b/sys/kern/vfs_default.c index cf49ef2..dab13c2 100644 --- a/sys/kern/vfs_default.c +++ b/sys/kern/vfs_default.c @@ -109,6 +109,11 @@ static struct vnodeopv_desc default_vnodeop_opv_desc = VNODEOP_SET(default_vnodeop_opv_desc); +/* + * Series of placeholder functions for various error returns for + * VOPs. + */ + int vop_eopnotsupp(struct vop_generic_args *ap) { @@ -147,6 +152,9 @@ vop_null(struct vop_generic_args *ap) return (0); } +/* + * Used to make a defined VOP fall back to the default VOP. + */ int vop_defaultop(struct vop_generic_args *ap) { @@ -154,6 +162,9 @@ vop_defaultop(struct vop_generic_args *ap) return (VOCALL(default_vnodeop_p, ap->a_desc->vdesc_offset, ap)); } +/* + * Helper function to panic on some bad VOPs in some filesystems. + */ int vop_panic(struct vop_generic_args *ap) { @@ -161,6 +172,18 @@ vop_panic(struct vop_generic_args *ap) panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name); } +/* + * vop_std<something> and vop_no<something> are default functions for use by + * filesystems that need the "default reasonable" implementation for a + * particular operation. + * + * The documentation for the operations they implement exists (if it exists) + * in the VOP_<SOMETHING>(9) manpage (all uppercase). + */ + +/* + * Default vop for filesystems that do not support name lookup + */ static int vop_nolookup(ap) struct vop_lookup_args /* { @@ -198,6 +221,14 @@ vop_nostrategy (struct vop_strategy_args *ap) return (EOPNOTSUPP); } +/* + * vop_stdpathconf: + * + * Standard implementation of POSIX pathconf, to get information about limits + * for a filesystem. + * Override per filesystem for the case where the filesystem has smaller + * limits. + */ int vop_stdpathconf(ap) struct vop_pathconf_args /* { @@ -256,6 +287,7 @@ vop_stdlock(ap) #endif } +/* See above. */ int vop_stdunlock(ap) struct vop_unlock_args /* { @@ -270,6 +302,7 @@ vop_stdunlock(ap) ap->a_td)); } +/* See above. */ int vop_stdislocked(ap) struct vop_islocked_args /* { @@ -281,6 +314,7 @@ vop_stdislocked(ap) return (lockstatus(&ap->a_vp->v_lock, ap->a_td)); } +/* Mark the vnode inactive */ int vop_stdinactive(ap) struct vop_inactive_args /* { @@ -512,6 +546,7 @@ vop_stdgetwritemount(ap) return (0); } +/* Create the VM system backing object for this vnode */ int vop_stdcreatevobject(ap) struct vop_createvobject_args /* { @@ -570,6 +605,7 @@ retn: return (error); } +/* Destroy the VM system object associated with this vnode */ int vop_stddestroyvobject(ap) struct vop_destroyvobject_args /* { @@ -627,6 +663,7 @@ vop_stdgetvobject(ap) return (vp->v_object ? 0 : EINVAL); } +/* XXX Needs good comment and VOP_BMAP(9) manpage */ int vop_stdbmap(ap) struct vop_bmap_args /* { @@ -650,6 +687,7 @@ vop_stdbmap(ap) return (0); } +/* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */ int vop_stdgetpages(ap) struct vop_getpages_args /* { @@ -665,6 +703,7 @@ vop_stdgetpages(ap) ap->a_count, ap->a_reqpage); } +/* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */ int vop_stdputpages(ap) struct vop_putpages_args /* { @@ -685,7 +724,7 @@ vop_stdputpages(ap) /* * vfs default ops - * used to fill the vfs fucntion table to get reasonable default return values. + * used to fill the vfs function table to get reasonable default return values. */ int vfs_stdmount (mp, path, data, ndp, td) @@ -698,7 +737,7 @@ vfs_stdmount (mp, path, data, ndp, td) return (0); } -int +int vfs_stdunmount (mp, mntflags, td) struct mount *mp; int mntflags; @@ -707,7 +746,7 @@ vfs_stdunmount (mp, mntflags, td) return (0); } -int +int vfs_stdroot (mp, vpp) struct mount *mp; struct vnode **vpp; @@ -715,7 +754,7 @@ vfs_stdroot (mp, vpp) return (EOPNOTSUPP); } -int +int vfs_stdstatfs (mp, sbp, td) struct mount *mp; struct statfs *sbp; @@ -732,7 +771,7 @@ vfs_stdvptofh (vp, fhp) return (EOPNOTSUPP); } -int +int vfs_stdstart (mp, flags, td) struct mount *mp; int flags; |
