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📄 Make.tags.inc(2.13 KB)
📄 Makefile(302 B)
📄 bus_if.m(26.31 KB)
📄 capabilities.conf(13.67 KB)
📄 clock_if.m(1.7 KB)
📄 cpufreq_if.m(2.27 KB)
📄 device_if.m(10.41 KB)
📄 firmw.S(2.15 KB)
📄 genassym.sh(1.11 KB)
📄 genoffset.c(1.68 KB)
📄 genoffset.sh(3.58 KB)
📄 imgact_aout.c(9.45 KB)
📄 imgact_binmisc.c(18.64 KB)
📄 imgact_elf.c(76.32 KB)
📄 imgact_elf32.c(1.47 KB)
📄 imgact_elf64.c(1.47 KB)
📄 imgact_shell.c(8.41 KB)
📄 init_main.c(24.31 KB)
📄 init_sysent.c(95.3 KB)
📄 kern_acct.c(19.03 KB)
📄 kern_alq.c(24.97 KB)
📄 kern_clock.c(21.12 KB)
📄 kern_clocksource.c(23.34 KB)
📄 kern_condvar.c(11.28 KB)
📄 kern_conf.c(36.14 KB)
📄 kern_cons.c(15.75 KB)
📄 kern_context.c(3.59 KB)
📄 kern_cpu.c(30.77 KB)
📄 kern_cpuset.c(59.78 KB)
📄 kern_ctf.c(8.73 KB)
📄 kern_descrip.c(112.87 KB)
📄 kern_dtrace.c(2.94 KB)
📄 kern_dump.c(8.51 KB)
📄 kern_environment.c(22.75 KB)
📄 kern_et.c(7.1 KB)
📄 kern_event.c(62.49 KB)
📄 kern_exec.c(46.67 KB)
📄 kern_exit.c(34.61 KB)
📄 kern_fail.c(29.32 KB)
📄 kern_ffclock.c(12.66 KB)
📄 kern_fork.c(28.29 KB)
📄 kern_hhook.c(13.58 KB)
📄 kern_idle.c(2.74 KB)
📄 kern_intr.c(40.44 KB)
📄 kern_jail.c(112.67 KB)
📄 kern_kcov.c(15.32 KB)
📄 kern_khelp.c(9.45 KB)
📄 kern_kthread.c(11.8 KB)
📄 kern_ktr.c(11.93 KB)
📄 kern_ktrace.c(31.41 KB)
📄 kern_linker.c(54.3 KB)
📄 kern_lock.c(46.99 KB)
📄 kern_lockf.c(64.46 KB)
📄 kern_lockstat.c(3.8 KB)
📄 kern_loginclass.c(6.69 KB)
📄 kern_malloc.c(37.09 KB)
📄 kern_mbuf.c(43.16 KB)
📄 kern_mib.c(24.26 KB)
📄 kern_module.c(11.05 KB)
📄 kern_mtxpool.c(5.82 KB)
📄 kern_mutex.c(33.62 KB)
📄 kern_ntptime.c(32.49 KB)
📄 kern_osd.c(12.37 KB)
📄 kern_physio.c(5.74 KB)
📄 kern_pmc.c(8.89 KB)
📄 kern_poll.c(15.86 KB)
📄 kern_priv.c(9.14 KB)
📄 kern_proc.c(80.01 KB)
📄 kern_procctl.c(19.48 KB)
📄 kern_prot.c(57.94 KB)
📄 kern_racct.c(34.01 KB)
📄 kern_rangelock.c(8.67 KB)
📄 kern_rctl.c(53.87 KB)
📄 kern_resource.c(36.66 KB)
📄 kern_rmlock.c(28.27 KB)
📄 kern_rwlock.c(40.72 KB)
📄 kern_sdt.c(2.05 KB)
📄 kern_sema.c(4.85 KB)
📄 kern_sendfile.c(33.97 KB)
📄 kern_sharedpage.c(10.37 KB)
📄 kern_shutdown.c(43.34 KB)
📄 kern_sig.c(101.89 KB)
📄 kern_switch.c(13.85 KB)
📄 kern_sx.c(40.27 KB)
📄 kern_synch.c(18.17 KB)
📄 kern_syscalls.c(6.74 KB)
📄 kern_sysctl.c(67.24 KB)
📄 kern_tc.c(55.73 KB)
📄 kern_thr.c(14.14 KB)
📄 kern_thread.c(41.75 KB)
📄 kern_time.c(40.89 KB)
📄 kern_timeout.c(43.08 KB)
📄 kern_tslog.c(3.44 KB)
📄 kern_ubsan.c(50.74 KB)
📄 kern_umtx.c(107.14 KB)
📄 kern_uuid.c(11.68 KB)
📄 kern_xxx.c(10.44 KB)
📄 ksched.c(6.56 KB)
📄 link_elf.c(47.99 KB)
📄 link_elf_obj.c(44.41 KB)
📄 linker_if.m(3.96 KB)
📄 makesyscalls.sh(23.57 KB)
📄 md4c.c(7.89 KB)
📄 md5c.c(9.56 KB)
📄 msi_if.m(2.48 KB)
📄 p1003_1b.c(8.84 KB)
📄 pic_if.m(3.9 KB)
📄 posix4_mib.c(5.59 KB)
📄 sched_4bsd.c(45.03 KB)
📄 sched_ule.c(82.65 KB)
📄 serdev_if.m(3.49 KB)
📄 stack_protector.c(613 B)
📄 subr_acl_nfs4.c(37.42 KB)
📄 subr_acl_posix1e.c(17.71 KB)
📄 subr_atomic64.c(3.97 KB)
📄 subr_autoconf.c(7.7 KB)
📄 subr_blist.c(31.88 KB)
📄 subr_boot.c(5.8 KB)
📄 subr_bufring.c(2.21 KB)
📄 subr_bus.c(145.4 KB)
📄 subr_bus_dma.c(19.67 KB)
📄 subr_busdma_bufalloc.c(5.24 KB)
📄 subr_capability.c(11.93 KB)
📄 subr_clock.c(10.61 KB)
📄 subr_compressor.c(13.11 KB)
📄 subr_counter.c(4.44 KB)
📄 subr_coverage.c(6.17 KB)
📄 subr_csan.c(25.39 KB)
📄 subr_devmap.c(9.8 KB)
📄 subr_devstat.c(16.21 KB)
📄 subr_disk.c(8.54 KB)
📄 subr_dummy_vdso_tc.c(1.7 KB)
📄 subr_early.c(2.26 KB)
📄 subr_epoch.c(25.02 KB)
📄 subr_eventhandler.c(9.17 KB)
📄 subr_fattime.c(9.98 KB)
📄 subr_filter.c(12.2 KB)
📄 subr_firmware.c(13.88 KB)
📄 subr_gtaskqueue.c(20.19 KB)
📄 subr_hash.c(4.8 KB)
📄 subr_hints.c(12.87 KB)
📄 subr_intr.c(40.61 KB)
📄 subr_kdb.c(16.13 KB)
📄 subr_kobj.c(7.1 KB)
📄 subr_lock.c(18.81 KB)
📄 subr_log.c(7.64 KB)
📄 subr_mchain.c(11.06 KB)
📄 subr_module.c(12.98 KB)
📄 subr_msgbuf.c(10.6 KB)
📄 subr_param.c(10.93 KB)
📄 subr_pcpu.c(10.18 KB)
📄 subr_pctrie.c(20.99 KB)
📄 subr_physmem.c(11.52 KB)
📄 subr_pidctrl.c(5.43 KB)
📄 subr_power.c(3.13 KB)
📄 subr_prf.c(27.42 KB)
📄 subr_prng.c(3.36 KB)
📄 subr_prof.c(15.43 KB)
📄 subr_rangeset.c(8.5 KB)
📄 subr_rman.c(27.61 KB)
📄 subr_rtc.c(11.42 KB)
📄 subr_sbuf.c(20.53 KB)
📄 subr_scanf.c(15.59 KB)
📄 subr_sfbuf.c(6.17 KB)
📄 subr_sglist.c(22.83 KB)
📄 subr_sleepqueue.c(39.43 KB)
📄 subr_smp.c(31.62 KB)
📄 subr_smr.c(20.17 KB)
📄 subr_stack.c(6.47 KB)
📄 subr_stats.c(103.01 KB)
📄 subr_syscall.c(7.98 KB)
📄 subr_taskqueue.c(21.1 KB)
📄 subr_terminal.c(15.52 KB)
📄 subr_trap.c(10.87 KB)
📄 subr_turnstile.c(35.58 KB)
📄 subr_uio.c(11.38 KB)
📄 subr_unit.c(22.97 KB)
📄 subr_vmem.c(43.25 KB)
📄 subr_witness.c(84.59 KB)
📄 sys_capability.c(15.06 KB)
📄 sys_eventfd.c(8.42 KB)
📄 sys_generic.c(44.22 KB)
📄 sys_getrandom.c(4.21 KB)
📄 sys_pipe.c(45.14 KB)
📄 sys_procdesc.c(14.57 KB)
📄 sys_process.c(30.73 KB)
📄 sys_socket.c(20.11 KB)
📄 syscalls.c(22.73 KB)
📄 syscalls.master(60.26 KB)
📄 systrace_args.c(178.49 KB)
📄 sysv_ipc.c(6.53 KB)
📄 sysv_msg.c(48.65 KB)
📄 sysv_sem.c(49.85 KB)
📄 sysv_shm.c(43.93 KB)
📄 tty.c(55.14 KB)
📄 tty_compat.c(11.46 KB)
📄 tty_info.c(9.93 KB)
📄 tty_inq.c(12.22 KB)
📄 tty_outq.c(8.74 KB)
📄 tty_pts.c(19.74 KB)
📄 tty_tty.c(2.83 KB)
📄 tty_ttydisc.c(28.6 KB)
📄 uipc_accf.c(8.07 KB)
📄 uipc_debug.c(12.42 KB)
📄 uipc_domain.c(13.13 KB)
📄 uipc_ktls.c(55.7 KB)
📄 uipc_mbuf.c(52.45 KB)
📄 uipc_mbuf2.c(12.64 KB)
📄 uipc_mbufhash.c(4.9 KB)
📄 uipc_mqueue.c(64.64 KB)
📄 uipc_sem.c(25.18 KB)
📄 uipc_shm.c(50.47 KB)
📄 uipc_sockbuf.c(42.9 KB)
📄 uipc_socket.c(110.61 KB)
📄 uipc_syscalls.c(35.94 KB)
📄 uipc_usrreq.c(75.11 KB)
📄 vfs_acl.c(14.5 KB)
📄 vfs_aio.c(76.32 KB)
📄 vfs_bio.c(145.39 KB)
📄 vfs_cache.c(143.09 KB)
📄 vfs_cluster.c(28.36 KB)
📄 vfs_default.c(33.16 KB)
📄 vfs_export.c(14.55 KB)
📄 vfs_extattr.c(17.91 KB)
📄 vfs_hash.c(6 KB)
📄 vfs_init.c(15.86 KB)
📄 vfs_lookup.c(45.48 KB)
📄 vfs_mount.c(62.58 KB)
📄 vfs_mountroot.c(26.23 KB)
📄 vfs_subr.c(167.52 KB)
📄 vfs_syscalls.c(106.86 KB)
📄 vfs_vnops.c(86.28 KB)
📄 vnode_if.src(13.66 KB)

Editing: vfs_extattr.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 1999-2001 Robert N. M. Watson
 * All rights reserved.
 *
 * This software was developed by Robert Watson for the TrustedBSD Project.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/capsicum.h>
#include <sys/lock.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/sysproto.h>
#include <sys/fcntl.h>
#include <sys/namei.h>
#include <sys/filedesc.h>
#include <sys/limits.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <sys/extattr.h>

#include <security/audit/audit.h>
#include <security/mac/mac_framework.h>

static int	kern_extattr_set_path(struct thread *td, const char *path,
		    int attrnamespace, const char *attrname, void *data,
		    size_t nbytes, int follow);
static int	kern_extattr_get_path(struct thread *td, const char *path,
		    int attrnamespace, const char *attrname, void *data,
		    size_t nbytes, int follow);
static int	kern_extattr_delete_path(struct thread *td, const char *path,
		    int attrnamespace, const char *attrname, int follow);
static int	kern_extattr_list_path(struct thread *td, const char *path,
		    int attrnamespace, void *data, size_t nbytes, int follow);

/*
 * Syscall to push extended attribute configuration information into the VFS.
 * Accepts a path, which it converts to a mountpoint, as well as a command
 * (int cmd), and attribute name and misc data.
 *
 * Currently this is used only by UFS1 extended attributes.
 */
#ifndef _SYS_SYSPROTO_H_
struct extattrctl_args {
	const char *path;
	int cmd;
	const char *filename;
	int attrnamespace;
	const char *attrname;
};
#endif
int
sys_extattrctl(struct thread *td, struct extattrctl_args *uap)
{
	struct vnode *filename_vp;
	struct nameidata nd;
	struct mount *mp, *mp_writable;
	char attrname[EXTATTR_MAXNAMELEN + 1];
	int error;

AUDIT_ARG_CMD(uap->cmd);
	AUDIT_ARG_VALUE(uap->attrnamespace);
	/*
	 * uap->attrname is not always defined.  We check again later when we
	 * invoke the VFS call so as to pass in NULL there if needed.
	 */
	if (uap->attrname != NULL) {
		error = copyinstr(uap->attrname, attrname, sizeof(attrname),
		    NULL);
		if (error)
			return (error);
	}
	AUDIT_ARG_TEXT(attrname);

mp = NULL;
	filename_vp = NULL;
	if (uap->filename != NULL) {
		NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE2,
		    UIO_USERSPACE, uap->filename, td);
		error = namei(&nd);
		if (error)
			return (error);
		filename_vp = nd.ni_vp;
		NDFREE(&nd, NDF_NO_VP_RELE);
	}

/* uap->path is always defined. */
	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNODE1,
	    UIO_USERSPACE, uap->path, td);
	error = namei(&nd);
	if (error)
		goto out;
	mp = nd.ni_vp->v_mount;
	error = vfs_busy(mp, 0);
	if (error) {
		NDFREE(&nd, 0);
		mp = NULL;
		goto out;
	}
	VOP_UNLOCK(nd.ni_vp);
	error = vn_start_write(nd.ni_vp, &mp_writable, V_WAIT | PCATCH);
	NDFREE(&nd, NDF_NO_VP_UNLOCK);
	if (error)
		goto out;
	if (filename_vp != NULL) {
		/*
		 * uap->filename is not always defined.  If it is,
		 * grab a vnode lock, which VFS_EXTATTRCTL() will
		 * later release.
		 */
		error = vn_lock(filename_vp, LK_EXCLUSIVE);
		if (error) {
			vn_finished_write(mp_writable);
			goto out;
		}
	}

error = VFS_EXTATTRCTL(mp, uap->cmd, filename_vp, uap->attrnamespace,
	    uap->attrname != NULL ? attrname : NULL);

vn_finished_write(mp_writable);
out:
	if (mp != NULL)
		vfs_unbusy(mp);

/*
	 * VFS_EXTATTRCTL will have unlocked, but not de-ref'd, filename_vp,
	 * so vrele it if it is defined.
	 */
	if (filename_vp != NULL)
		vrele(filename_vp);
	return (error);
}

/*-
 * Set a named extended attribute on a file or directory
 *
 * Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
 *            kernelspace string pointer "attrname", userspace buffer
 *            pointer "data", buffer length "nbytes", thread "td".
 * Returns: 0 on success, an error number otherwise
 * Locks: none
 * References: vp must be a valid reference for the duration of the call
 */
static int
extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname,
    void *data, size_t nbytes, struct thread *td)
{
	struct mount *mp;
	struct uio auio;
	struct iovec aiov;
	ssize_t cnt;
	int error;

if (nbytes > IOSIZE_MAX)
		return (EINVAL);

error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
	if (error)
		return (error);
	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);

aiov.iov_base = data;
	aiov.iov_len = nbytes;
	auio.uio_iov = &aiov;
	auio.uio_iovcnt = 1;
	auio.uio_offset = 0;
	auio.uio_resid = nbytes;
	auio.uio_rw = UIO_WRITE;
	auio.uio_segflg = UIO_USERSPACE;
	auio.uio_td = td;
	cnt = nbytes;

#ifdef MAC
	error = mac_vnode_check_setextattr(td->td_ucred, vp, attrnamespace,
	    attrname);
	if (error)
		goto done;
#endif

error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio,
	    td->td_ucred, td);
	cnt -= auio.uio_resid;
	td->td_retval[0] = cnt;

#ifdef MAC
done:
#endif
	VOP_UNLOCK(vp);
	vn_finished_write(mp);
	return (error);
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_set_fd_args {
	int fd;
	int attrnamespace;
	const char *attrname;
	void *data;
	size_t nbytes;
};
#endif
int
sys_extattr_set_fd(struct thread *td, struct extattr_set_fd_args *uap)
{
	struct file *fp;
	char attrname[EXTATTR_MAXNAMELEN + 1];
	cap_rights_t rights;
	int error;

AUDIT_ARG_FD(uap->fd);
	AUDIT_ARG_VALUE(uap->attrnamespace);
	error = copyinstr(uap->attrname, attrname, sizeof(attrname), NULL);
	if (error)
		return (error);
	AUDIT_ARG_TEXT(attrname);

error = getvnode(td, uap->fd,
	    cap_rights_init_one(&rights, CAP_EXTATTR_SET), &fp);
	if (error)
		return (error);

error = extattr_set_vp(fp->f_vnode, uap->attrnamespace,
	    attrname, uap->data, uap->nbytes, td);
	fdrop(fp, td);

return (error);
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_set_file_args {
	const char *path;
	int attrnamespace;
	const char *attrname;
	void *data;
	size_t nbytes;
};
#endif
int
sys_extattr_set_file(struct thread *td, struct extattr_set_file_args *uap)
{

return (kern_extattr_set_path(td, uap->path, uap->attrnamespace,
	    uap->attrname, uap->data, uap->nbytes, FOLLOW));
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_set_link_args {
	const char *path;
	int attrnamespace;
	const char *attrname;
	void *data;
	size_t nbytes;
};
#endif
int
sys_extattr_set_link(struct thread *td, struct extattr_set_link_args *uap)
{

return (kern_extattr_set_path(td, uap->path, uap->attrnamespace,
	    uap->attrname, uap->data, uap->nbytes, NOFOLLOW));
}

static int
kern_extattr_set_path(struct thread *td, const char *path, int attrnamespace,
    const char *uattrname, void *data, size_t nbytes, int follow)
{
	struct nameidata nd;
	char attrname[EXTATTR_MAXNAMELEN + 1];
	int error;

AUDIT_ARG_VALUE(attrnamespace);
	error = copyinstr(uattrname, attrname, sizeof(attrname), NULL);
	if (error)
		return (error);
	AUDIT_ARG_TEXT(attrname);

NDINIT(&nd, LOOKUP, follow | AUDITVNODE1, UIO_USERSPACE, path, td);
	error = namei(&nd);
	if (error)
		return (error);
	NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_set_vp(nd.ni_vp, attrnamespace, attrname, data,
	    nbytes, td);

vrele(nd.ni_vp);
	return (error);
}

/*-
 * Get a named extended attribute on a file or directory
 *
 * Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
 *            kernelspace string pointer "attrname", userspace buffer
 *            pointer "data", buffer length "nbytes", thread "td".
 * Returns: 0 on success, an error number otherwise
 * Locks: none
 * References: vp must be a valid reference for the duration of the call
 */
static int
extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname,
    void *data, size_t nbytes, struct thread *td)
{
	struct uio auio, *auiop;
	struct iovec aiov;
	ssize_t cnt;
	size_t size, *sizep;
	int error;

if (nbytes > IOSIZE_MAX)
		return (EINVAL);

vn_lock(vp, LK_SHARED | LK_RETRY);

/*
	 * Slightly unusual semantics: if the user provides a NULL data
	 * pointer, they don't want to receive the data, just the maximum
	 * read length.
	 */
	auiop = NULL;
	sizep = NULL;
	cnt = 0;
	if (data != NULL) {
		aiov.iov_base = data;
		aiov.iov_len = nbytes;
		auio.uio_iov = &aiov;
		auio.uio_iovcnt = 1;
		auio.uio_offset = 0;
		auio.uio_resid = nbytes;
		auio.uio_rw = UIO_READ;
		auio.uio_segflg = UIO_USERSPACE;
		auio.uio_td = td;
		auiop = &auio;
		cnt = nbytes;
	} else
		sizep = &size;

#ifdef MAC
	error = mac_vnode_check_getextattr(td->td_ucred, vp, attrnamespace,
	    attrname);
	if (error)
		goto done;
#endif

error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep,
	    td->td_ucred, td);

if (auiop != NULL) {
		cnt -= auio.uio_resid;
		td->td_retval[0] = cnt;
	} else
		td->td_retval[0] = size;
#ifdef MAC
done:
#endif
	VOP_UNLOCK(vp);
	return (error);
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_get_fd_args {
	int fd;
	int attrnamespace;
	const char *attrname;
	void *data;
	size_t nbytes;
};
#endif
int
sys_extattr_get_fd(struct thread *td, struct extattr_get_fd_args *uap)
{
	struct file *fp;
	char attrname[EXTATTR_MAXNAMELEN + 1];
	cap_rights_t rights;
	int error;

AUDIT_ARG_FD(uap->fd);
	AUDIT_ARG_VALUE(uap->attrnamespace);
	error = copyinstr(uap->attrname, attrname, sizeof(attrname), NULL);
	if (error)
		return (error);
	AUDIT_ARG_TEXT(attrname);

error = getvnode(td, uap->fd,
	    cap_rights_init_one(&rights, CAP_EXTATTR_GET), &fp);
	if (error)
		return (error);

error = extattr_get_vp(fp->f_vnode, uap->attrnamespace,
	    attrname, uap->data, uap->nbytes, td);

fdrop(fp, td);
	return (error);
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_get_file_args {
	const char *path;
	int attrnamespace;
	const char *attrname;
	void *data;
	size_t nbytes;
};
#endif
int
sys_extattr_get_file(struct thread *td, struct extattr_get_file_args *uap)
{
	return (kern_extattr_get_path(td, uap->path, uap->attrnamespace,
	    uap->attrname, uap->data, uap->nbytes, FOLLOW));
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_get_link_args {
	const char *path;
	int attrnamespace;
	const char *attrname;
	void *data;
	size_t nbytes;
};
#endif
int
sys_extattr_get_link(struct thread *td, struct extattr_get_link_args *uap)
{
	return (kern_extattr_get_path(td, uap->path, uap->attrnamespace,
	    uap->attrname, uap->data, uap->nbytes, NOFOLLOW));
}

static int
kern_extattr_get_path(struct thread *td, const char *path, int attrnamespace,
    const char *uattrname, void *data, size_t nbytes, int follow)
{
	struct nameidata nd;
	char attrname[EXTATTR_MAXNAMELEN + 1];
	int error;

AUDIT_ARG_VALUE(attrnamespace);
	error = copyinstr(uattrname, attrname, sizeof(attrname), NULL);
	if (error)
		return (error);
	AUDIT_ARG_TEXT(attrname);

NDINIT(&nd, LOOKUP, follow | AUDITVNODE1, UIO_USERSPACE, path, td);
	error = namei(&nd);
	if (error)
		return (error);
	NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_get_vp(nd.ni_vp, attrnamespace, attrname, data,
	    nbytes, td);

vrele(nd.ni_vp);
	return (error);
}

/*
 * extattr_delete_vp(): Delete a named extended attribute on a file or
 *                      directory
 *
 * Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",
 *            kernelspace string pointer "attrname", proc "p"
 * Returns: 0 on success, an error number otherwise
 * Locks: none
 * References: vp must be a valid reference for the duration of the call
 */
static int
extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname,
    struct thread *td)
{
	struct mount *mp;
	int error;

error = vn_start_write(vp, &mp, V_WAIT | PCATCH);
	if (error)
		return (error);
	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);

#ifdef MAC
	error = mac_vnode_check_deleteextattr(td->td_ucred, vp, attrnamespace,
	    attrname);
	if (error)
		goto done;
#endif

error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, td->td_ucred,
	    td);
	if (error == EOPNOTSUPP)
		error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL,
		    td->td_ucred, td);
#ifdef MAC
done:
#endif
	VOP_UNLOCK(vp);
	vn_finished_write(mp);
	return (error);
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_delete_fd_args {
	int fd;
	int attrnamespace;
	const char *attrname;
};
#endif
int
sys_extattr_delete_fd(struct thread *td, struct extattr_delete_fd_args *uap)
{
	struct file *fp;
	char attrname[EXTATTR_MAXNAMELEN + 1];
	cap_rights_t rights;
	int error;

AUDIT_ARG_FD(uap->fd);
	AUDIT_ARG_VALUE(uap->attrnamespace);
	error = copyinstr(uap->attrname, attrname, sizeof(attrname), NULL);
	if (error)
		return (error);
	AUDIT_ARG_TEXT(attrname);

error = getvnode(td, uap->fd,
	    cap_rights_init_one(&rights, CAP_EXTATTR_DELETE), &fp);
	if (error)
		return (error);

error = extattr_delete_vp(fp->f_vnode, uap->attrnamespace,
	    attrname, td);
	fdrop(fp, td);
	return (error);
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_delete_file_args {
	const char *path;
	int attrnamespace;
	const char *attrname;
};
#endif
int
sys_extattr_delete_file(struct thread *td, struct extattr_delete_file_args *uap)
{

return (kern_extattr_delete_path(td, uap->path, uap->attrnamespace,
	    uap->attrname, FOLLOW));
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_delete_link_args {
	const char *path;
	int attrnamespace;
	const char *attrname;
};
#endif
int
sys_extattr_delete_link(struct thread *td, struct extattr_delete_link_args *uap)
{

return (kern_extattr_delete_path(td, uap->path, uap->attrnamespace,
	    uap->attrname, NOFOLLOW));
}

static int
kern_extattr_delete_path(struct thread *td, const char *path, int attrnamespace,
    const char *uattrname, int follow)
{
	struct nameidata nd;
	char attrname[EXTATTR_MAXNAMELEN + 1];
	int error;

AUDIT_ARG_VALUE(attrnamespace);
	error = copyinstr(uattrname, attrname, sizeof(attrname), NULL);
	if (error)
		return(error);
	AUDIT_ARG_TEXT(attrname);

NDINIT(&nd, LOOKUP, follow | AUDITVNODE1, UIO_USERSPACE, path, td);
	error = namei(&nd);
	if (error)
		return(error);
	NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_delete_vp(nd.ni_vp, attrnamespace, attrname, td);
	vrele(nd.ni_vp);
	return(error);
}

/*-
 * Retrieve a list of extended attributes on a file or directory.
 *
 * Arguments: unlocked vnode "vp", attribute namespace 'attrnamespace",
 *            userspace buffer pointer "data", buffer length "nbytes",
 *            thread "td".
 * Returns: 0 on success, an error number otherwise
 * Locks: none
 * References: vp must be a valid reference for the duration of the call
 */
static int
extattr_list_vp(struct vnode *vp, int attrnamespace, void *data,
    size_t nbytes, struct thread *td)
{
	struct uio auio, *auiop;
	size_t size, *sizep;
	struct iovec aiov;
	ssize_t cnt;
	int error;

if (nbytes > IOSIZE_MAX)
		return (EINVAL);

auiop = NULL;
	sizep = NULL;
	cnt = 0;
	if (data != NULL) {
		aiov.iov_base = data;
		aiov.iov_len = nbytes;
		auio.uio_iov = &aiov;
		auio.uio_iovcnt = 1;
		auio.uio_offset = 0;
		auio.uio_resid = nbytes;
		auio.uio_rw = UIO_READ;
		auio.uio_segflg = UIO_USERSPACE;
		auio.uio_td = td;
		auiop = &auio;
		cnt = nbytes;
	} else
		sizep = &size;

vn_lock(vp, LK_SHARED | LK_RETRY);

#ifdef MAC
	error = mac_vnode_check_listextattr(td->td_ucred, vp, attrnamespace);
	if (error) {
		VOP_UNLOCK(vp);
		return (error);
	}
#endif

error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep,
	    td->td_ucred, td);
	VOP_UNLOCK(vp);

if (auiop != NULL) {
		cnt -= auio.uio_resid;
		td->td_retval[0] = cnt;
	} else
		td->td_retval[0] = size;
	return (error);
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_list_fd_args {
	int fd;
	int attrnamespace;
	void *data;
	size_t nbytes;
};
#endif
int
sys_extattr_list_fd(struct thread *td, struct extattr_list_fd_args *uap)
{
	struct file *fp;
	cap_rights_t rights;
	int error;

AUDIT_ARG_FD(uap->fd);
	AUDIT_ARG_VALUE(uap->attrnamespace);
	error = getvnode(td, uap->fd,
	    cap_rights_init_one(&rights, CAP_EXTATTR_LIST), &fp);
	if (error)
		return (error);

error = extattr_list_vp(fp->f_vnode, uap->attrnamespace, uap->data,
	    uap->nbytes, td);

fdrop(fp, td);
	return (error);
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_list_file_args {
	const char *path;
	int attrnamespace;
	void *data;
	size_t nbytes;
}
#endif
int
sys_extattr_list_file(struct thread *td, struct extattr_list_file_args *uap)
{

return (kern_extattr_list_path(td, uap->path, uap->attrnamespace,
	    uap->data, uap->nbytes, FOLLOW));
}

#ifndef _SYS_SYSPROTO_H_
struct extattr_list_link_args {
	const char *path;
	int attrnamespace;
	void *data;
	size_t nbytes;
};
#endif
int
sys_extattr_list_link(struct thread *td, struct extattr_list_link_args *uap)
{

return (kern_extattr_list_path(td, uap->path, uap->attrnamespace,
	    uap->data, uap->nbytes, NOFOLLOW));
}

static int
kern_extattr_list_path(struct thread *td, const char *path, int attrnamespace,
    void *data, size_t nbytes, int follow)
{
	struct nameidata nd;
	int error;

AUDIT_ARG_VALUE(attrnamespace);
	NDINIT(&nd, LOOKUP, follow | AUDITVNODE1, UIO_USERSPACE, path, td);
	error = namei(&nd);
	if (error)
		return (error);
	NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_list_vp(nd.ni_vp, attrnamespace, data, nbytes, td);

vrele(nd.ni_vp);
	return (error);
}

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