Differential D14365 Diff 39304 head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c

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head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c

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#include <sys/dsl_dataset.h>		#include <sys/dsl_dataset.h>
#include <sys/dsl_destroy.h>		#include <sys/dsl_destroy.h>
#include <sys/dsl_deleg.h>		#include <sys/dsl_deleg.h>
#include <sys/mount.h>		#include <sys/mount.h>
#include <sys/zap.h>		#include <sys/zap.h>

#include "zfs_namecheck.h"		#include "zfs_namecheck.h"

		/* Common access mode for all virtual directories under the ctldir */
		const u_short zfsctl_ctldir_mode = S_IRUSR \| S_IXUSR \| S_IRGRP \| S_IXGRP \|
		S_IROTH \| S_IXOTH;

/*		/*
* "Synthetic" filesystem implementation.		* "Synthetic" filesystem implementation.
*/		*/

/*		/*
* Assert that A implies B.		* Assert that A implies B.
*/		*/
#define KASSERT_IMPLY(A, B, msg) KASSERT(!(A) \|\| (B), (msg));		#define KASSERT_IMPLY(A, B, msg) KASSERT(!(A) \|\| (B), (msg));
▲ Show 20 Lines • Show All 400 Lines • ▼ Show 20 Lines	zfsctl_common_getattr(vnode_t vp, vattr_t vap)
/*		/*
* We are a purely virtual object, so we have no		* We are a purely virtual object, so we have no
* blocksize or allocated blocks.		* blocksize or allocated blocks.
*/		*/
vap->va_blksize = 0;		vap->va_blksize = 0;
vap->va_nblocks = 0;		vap->va_nblocks = 0;
vap->va_seq = 0;		vap->va_seq = 0;
vn_fsid(vp, vap);		vn_fsid(vp, vap);
vap->va_mode = S_IRUSR \| S_IXUSR \| S_IRGRP \| S_IXGRP \|		vap->va_mode = zfsctl_ctldir_mode;
S_IROTH \| S_IXOTH;
vap->va_type = VDIR;		vap->va_type = VDIR;
/*		/*
* We live in the now (for atime).		* We live in the now (for atime).
*/		*/
gethrestime(&now);		gethrestime(&now);
vap->va_atime = now;		vap->va_atime = now;
/* FreeBSD: Reset chflags(2) flags. */		/* FreeBSD: Reset chflags(2) flags. */
vap->va_flags = 0;		vap->va_flags = 0;
▲ Show 20 Lines • Show All 210 Lines • ▼ Show 20 Lines	zfsctl_root_vptocnp(struct vop_vptocnp_args *ap)

VOP_UNLOCK(dvp, 0);		VOP_UNLOCK(dvp, 0);
*ap->a_vpp = dvp;		*ap->a_vpp = dvp;
*ap->a_buflen -= sizeof (dotzfs_name);		*ap->a_buflen -= sizeof (dotzfs_name);
bcopy(dotzfs_name, ap->a_buf + *ap->a_buflen, sizeof (dotzfs_name));		bcopy(dotzfs_name, ap->a_buf + *ap->a_buflen, sizeof (dotzfs_name));
return (0);		return (0);
}		}

		static int
		zfsctl_common_pathconf(ap)
		struct vop_pathconf_args /* {
		struct vnode *a_vp;
		int a_name;
		int *a_retval;
		} / ap;
		{
		/*
		* We care about ACL variables so that user land utilities like ls
		* can display them correctly. Since the ctldir's st_dev is set to be
		* the same as the parent dataset, we must support all variables that
		* it supports.
		*/
		switch (ap->a_name) {
		case _PC_LINK_MAX:
		*ap->a_retval = INT_MAX;
		return (0);

		case _PC_FILESIZEBITS:
		*ap->a_retval = 64;
		return (0);

		case _PC_MIN_HOLE_SIZE:
		*ap->a_retval = (int)SPA_MINBLOCKSIZE;
		return (0);

		case _PC_ACL_EXTENDED:
		*ap->a_retval = 0;
		return (0);

		case _PC_ACL_NFS4:
		*ap->a_retval = 1;
		return (0);

		case _PC_ACL_PATH_MAX:
		*ap->a_retval = ACL_MAX_ENTRIES;
		return (0);

		default:
		return (EINVAL);
		}
		}

		/**
		* Returns a trivial ACL
		*/
		int
		zfsctl_common_getacl(ap)
		struct vop_getacl_args /* {
		struct vnode *vp;
		acl_type_t a_type;
		struct acl *a_aclp;
		struct ucred *cred;
		struct thread *td;
		} / ap;
		{
		int i;

		if (ap->a_type != ACL_TYPE_NFS4)
		return (EINVAL);

		acl_nfs4_sync_acl_from_mode(ap->a_aclp, zfsctl_ctldir_mode, 0);
		/*
		* acl_nfs4_sync_acl_from_mode assumes that the owner can always modify
		* attributes. That is not the case for the ctldir, so we must clear
		* those bits. We also must clear ACL_READ_NAMED_ATTRS, because xattrs
		* aren't supported by the ctldir.
		*/
		for (i = 0; i < ap->a_aclp->acl_cnt; i++) {
		struct acl_entry *entry;
		entry = &(ap->a_aclp->acl_entry[i]);
		uint32_t old_perm = entry->ae_perm;
		entry->ae_perm &= ~(ACL_WRITE_ACL \| ACL_WRITE_OWNER \|
		ACL_WRITE_ATTRIBUTES \| ACL_WRITE_NAMED_ATTRS \|
		ACL_READ_NAMED_ATTRS );
		}

		return (0);
		}

static struct vop_vector zfsctl_ops_root = {		static struct vop_vector zfsctl_ops_root = {
.vop_default = &default_vnodeops,		.vop_default = &default_vnodeops,
.vop_open = zfsctl_common_open,		.vop_open = zfsctl_common_open,
.vop_close = zfsctl_common_close,		.vop_close = zfsctl_common_close,
.vop_ioctl = VOP_EINVAL,		.vop_ioctl = VOP_EINVAL,
.vop_getattr = zfsctl_root_getattr,		.vop_getattr = zfsctl_root_getattr,
.vop_access = zfsctl_common_access,		.vop_access = zfsctl_common_access,
.vop_readdir = zfsctl_root_readdir,		.vop_readdir = zfsctl_root_readdir,
.vop_lookup = zfsctl_root_lookup,		.vop_lookup = zfsctl_root_lookup,
.vop_inactive = VOP_NULL,		.vop_inactive = VOP_NULL,
.vop_reclaim = zfsctl_common_reclaim,		.vop_reclaim = zfsctl_common_reclaim,
.vop_fid = zfsctl_common_fid,		.vop_fid = zfsctl_common_fid,
.vop_print = zfsctl_common_print,		.vop_print = zfsctl_common_print,
.vop_vptocnp = zfsctl_root_vptocnp,		.vop_vptocnp = zfsctl_root_vptocnp,
		.vop_pathconf = zfsctl_common_pathconf,
		.vop_getacl = zfsctl_common_getacl,
};		};

static int		static int
zfsctl_snapshot_zname(vnode_t vp, const char name, int len, char *zname)		zfsctl_snapshot_zname(vnode_t vp, const char name, int len, char *zname)
{		{
objset_t os = ((zfsvfs_t )((vp)->v_vfsp->vfs_data))->z_os;		objset_t os = ((zfsvfs_t )((vp)->v_vfsp->vfs_data))->z_os;

dmu_objset_name(os, zname);		dmu_objset_name(os, zname);
▲ Show 20 Lines • Show All 312 Lines • ▼ Show 20 Lines	static struct vop_vector zfsctl_ops_snapdir = {
.vop_close = zfsctl_common_close,		.vop_close = zfsctl_common_close,
.vop_getattr = zfsctl_snapdir_getattr,		.vop_getattr = zfsctl_snapdir_getattr,
.vop_access = zfsctl_common_access,		.vop_access = zfsctl_common_access,
.vop_readdir = zfsctl_snapdir_readdir,		.vop_readdir = zfsctl_snapdir_readdir,
.vop_lookup = zfsctl_snapdir_lookup,		.vop_lookup = zfsctl_snapdir_lookup,
.vop_reclaim = zfsctl_common_reclaim,		.vop_reclaim = zfsctl_common_reclaim,
.vop_fid = zfsctl_common_fid,		.vop_fid = zfsctl_common_fid,
.vop_print = zfsctl_common_print,		.vop_print = zfsctl_common_print,
		.vop_pathconf = zfsctl_common_pathconf,
		.vop_getacl = zfsctl_common_getacl,
};		};

static int		static int
zfsctl_snapshot_inactive(ap)		zfsctl_snapshot_inactive(ap)
struct vop_inactive_args /* {		struct vop_inactive_args /* {
struct vnode *a_vp;		struct vnode *a_vp;
struct thread *a_td;		struct thread *a_td;
} / ap;		} / ap;
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