#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/filedesc.h>
#include <sys/kernel.h>
#include <sys/file_internal.h>
#include <sys/stat.h>
#include <sys/vnode_internal.h>
#include <sys/mount_internal.h>
#include <sys/proc_internal.h>
#include <sys/kauth.h>
#include <sys/uio_internal.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/dirent.h>
#include <sys/attr.h>
#include <sys/sysctl.h>
#include <sys/ubc.h>
#include <sys/quota.h>
#include <sys/kdebug.h>
#include <sys/fsevents.h>
#include <sys/sysproto.h>
#include <sys/xattr.h>
#include <sys/fcntl.h>
#include <sys/fsctl.h>
#include <sys/ubc_internal.h>
#include <sys/disk.h>
#include <machine/cons.h>
#include <machine/limits.h>
#include <miscfs/specfs/specdev.h>
#include <miscfs/union/union.h>
#include <security/audit/audit.h>
#include <bsm/audit_kevents.h>
#include <mach/mach_types.h>
#include <kern/kern_types.h>
#include <kern/kalloc.h>
#include <vm/vm_pageout.h>
#include <libkern/OSAtomic.h>
#include <pexpert/pexpert.h>
#if CONFIG_MACF
#include <security/mac.h>
#include <security/mac_framework.h>
#endif
#if CONFIG_FSE
#define GET_PATH(x) \
(x) = get_pathbuff();
#define RELEASE_PATH(x) \
release_pathbuff(x);
#else
#define GET_PATH(x) \
MALLOC_ZONE((x), char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
#define RELEASE_PATH(x) \
FREE_ZONE((x), MAXPATHLEN, M_NAMEI);
#endif
struct cdirargs {
vnode_t olddp;
vnode_t newdp;
};
static int checkdirs_callback(proc_t p, void * arg);
static int change_dir(struct nameidata *ndp, vfs_context_t ctx);
static int checkdirs(vnode_t olddp, vfs_context_t ctx);
void enablequotas(struct mount *mp, vfs_context_t ctx);
static int getfsstat_callback(mount_t mp, void * arg);
static int getutimes(user_addr_t usrtvp, struct timespec *tsp);
static int setutimes(vfs_context_t ctx, vnode_t vp, const struct timespec *ts, int nullflag);
static int sync_callback(mount_t, void *);
static int munge_statfs(struct mount *mp, struct vfsstatfs *sfsp,
user_addr_t bufp, int *sizep, boolean_t is_64_bit,
boolean_t partial_copy);
static int statfs64_common(struct mount *mp, struct vfsstatfs *sfsp,
user_addr_t bufp);
static int fsync_common(proc_t p, struct fsync_args *uap, int flags);
#ifdef CONFIG_IMGSRC_ACCESS
static int prepare_coveredvp(vnode_t vp, vfs_context_t ctx, struct componentname *cnp, const char *fsname);
static int authorize_devpath_and_update_mntfromname(mount_t mp, user_addr_t devpath, vnode_t *devvpp, vfs_context_t ctx);
static int place_mount_and_checkdirs(mount_t mp, vnode_t vp, vfs_context_t ctx);
static void undo_place_on_covered_vp(mount_t mp, vnode_t vp);
static int mount_begin_update(mount_t mp, vfs_context_t ctx, int flags);
static void mount_end_update(mount_t mp);
static int relocate_imageboot_source(vnode_t vp, struct componentname *cnp, const char *fsname, vfs_context_t ctx, boolean_t is64bit, user_addr_t fsmountargs);
#endif
int (*union_dircheckp)(struct vnode **, struct fileproc *, vfs_context_t);
__private_extern__
int sync_internal(void);
__private_extern__
int open1(vfs_context_t, struct nameidata *, int, struct vnode_attr *, int32_t *);
__private_extern__
int unlink1(vfs_context_t, struct nameidata *, int);
#ifdef __APPLE_API_OBSOLETE
struct fstatv_args {
int fd;
struct vstat *vsb;
};
struct lstatv_args {
const char *path;
struct vstat *vsb;
};
struct mkcomplex_args {
const char *path;
mode_t mode;
u_int32_t type;
};
struct statv_args {
const char *path;
struct vstat *vsb;
};
int fstatv(proc_t p, struct fstatv_args *uap, int32_t *retval);
int lstatv(proc_t p, struct lstatv_args *uap, int32_t *retval);
int mkcomplex(proc_t p, struct mkcomplex_args *uap, int32_t *retval);
int statv(proc_t p, struct statv_args *uap, int32_t *retval);
#endif
uint32_t mount_generation = 0;
unsigned int vfs_nummntops=0;
extern struct fileops vnops;
extern errno_t rmdir_remove_orphaned_appleDouble(vnode_t, vfs_context_t, int *);
int
mount(proc_t p, struct mount_args *uap, __unused int32_t *retval)
{
struct __mac_mount_args muap;
muap.type = uap->type;
muap.path = uap->path;
muap.flags = uap->flags;
muap.data = uap->data;
muap.mac_p = USER_ADDR_NULL;
return (__mac_mount(p, &muap, retval));
}
int
__mac_mount(struct proc *p, register struct __mac_mount_args *uap, __unused int32_t *retval)
{
struct vnode *vp, *pvp;
struct vnode *devvp = NULLVP;
struct vnode *device_vnode = NULLVP;
#if CONFIG_MACF
struct vnode *rvp;
#endif
struct mount *mp;
struct vfstable *vfsp = (struct vfstable *)0;
int error, flag = 0;
struct vnode_attr va;
vfs_context_t ctx = vfs_context_current();
struct nameidata nd;
struct nameidata nd1;
char fstypename[MFSNAMELEN];
size_t dummy=0;
user_addr_t devpath = USER_ADDR_NULL;
user_addr_t fsmountargs = uap->data;
int ronly = 0;
int mntalloc = 0;
boolean_t vfsp_ref = FALSE;
mode_t accessmode;
boolean_t is_64bit;
boolean_t is_rwlock_locked = FALSE;
boolean_t did_rele = FALSE;
boolean_t have_usecount = FALSE;
AUDIT_ARG(fflags, uap->flags);
is_64bit = proc_is64bit(p);
NDINIT(&nd, LOOKUP, NOTRIGGER | FOLLOW | AUDITVNPATH1 | WANTPARENT,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
pvp = nd.ni_dvp;
if ((vp->v_flag & VROOT) &&
(vp->v_mount->mnt_flag & MNT_ROOTFS))
uap->flags |= MNT_UPDATE;
error = copyinstr(uap->type, fstypename, MFSNAMELEN, &dummy);
if (error)
goto out1;
#ifdef CONFIG_IMGSRC_ACCESS
if (uap->flags == MNT_IMGSRC) {
error = relocate_imageboot_source(vp, &nd.ni_cnd, fstypename, ctx, is_64bit, fsmountargs);
vnode_put(pvp);
vnode_put(vp);
return error;
}
#endif
if (uap->flags & MNT_UPDATE) {
if ((vp->v_flag & VROOT) == 0) {
error = EINVAL;
goto out1;
}
mp = vp->v_mount;
mount_lock_spin(mp);
if (mp->mnt_lflag & MNT_LUNMOUNT) {
mount_unlock(mp);
error = EBUSY;
goto out1;
}
mount_unlock(mp);
lck_rw_lock_exclusive(&mp->mnt_rwlock);
is_rwlock_locked = TRUE;
if ((uap->flags & MNT_RELOAD) &&
((mp->mnt_flag & MNT_RDONLY) == 0)) {
error = ENOTSUP;
goto out1;
}
#ifdef CONFIG_IMGSRC_ACCESS
if ((mp->mnt_kern_flag & MNTK_BACKS_ROOT) &&
(!vfs_isrdonly(mp)) && (uap->flags & MNT_RDONLY))
{
error = ENOTSUP;
goto out1;
}
#endif
if (mp->mnt_vfsstat.f_owner != kauth_cred_getuid(vfs_context_ucred(ctx)) &&
(error = suser(vfs_context_ucred(ctx), &p->p_acflag))) {
goto out1;
}
#if CONFIG_MACF
error = mac_mount_check_remount(ctx, mp);
if (error != 0) {
lck_rw_done(&mp->mnt_rwlock);
goto out1;
}
#endif
if (suser(vfs_context_ucred(ctx), NULL)) {
uap->flags |= MNT_NOSUID | MNT_NODEV;
if (mp->mnt_flag & MNT_NOEXEC)
uap->flags |= MNT_NOEXEC;
}
flag = mp->mnt_flag;
mp->mnt_flag |=
uap->flags & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);
vfsp = mp->mnt_vtable;
goto update;
}
VATTR_INIT(&va);
VATTR_WANTED(&va, va_uid);
if ((error = vnode_getattr(vp, &va, ctx)) ||
(va.va_uid != kauth_cred_getuid(vfs_context_ucred(ctx)) &&
(error = suser(vfs_context_ucred(ctx), &p->p_acflag)))) {
goto out1;
}
if (suser(vfs_context_ucred(ctx), NULL)) {
uap->flags |= MNT_NOSUID | MNT_NODEV;
if (vp->v_mount->mnt_flag & MNT_NOEXEC)
uap->flags |= MNT_NOEXEC;
}
if ( (error = VNOP_FSYNC(vp, MNT_WAIT, ctx)) )
goto out1;
if ( (error = buf_invalidateblks(vp, BUF_WRITE_DATA, 0, 0)) )
goto out1;
if (vp->v_type != VDIR) {
error = ENOTDIR;
goto out1;
}
AUDIT_ARG(text, fstypename);
mount_list_lock();
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
if (!strncmp(vfsp->vfc_name, fstypename, MFSNAMELEN)) {
vfsp->vfc_refcount++;
vfsp_ref = TRUE;
break;
}
mount_list_unlock();
if (vfsp == NULL) {
error = ENODEV;
goto out1;
}
#if CONFIG_MACF
error = mac_mount_check_mount(ctx, vp,
&nd.ni_cnd, vfsp->vfc_name);
if (error != 0)
goto out1;
#endif
if (ISSET(vp->v_flag, VMOUNT) && (vp->v_mountedhere != NULL)) {
error = EBUSY;
goto out1;
}
vnode_lock_spin(vp);
SET(vp->v_flag, VMOUNT);
vnode_unlock(vp);
MALLOC_ZONE(mp, struct mount *, (u_int32_t)sizeof(struct mount),
M_MOUNT, M_WAITOK);
bzero((char *)mp, (u_int32_t)sizeof(struct mount));
mntalloc = 1;
mp->mnt_maxreadcnt = mp->mnt_maxwritecnt = MAXPHYS;
mp->mnt_segreadcnt = mp->mnt_segwritecnt = 32;
mp->mnt_maxsegreadsize = mp->mnt_maxreadcnt;
mp->mnt_maxsegwritesize = mp->mnt_maxwritecnt;
mp->mnt_devblocksize = DEV_BSIZE;
mp->mnt_alignmentmask = PAGE_MASK;
mp->mnt_ioqueue_depth = MNT_DEFAULT_IOQUEUE_DEPTH;
mp->mnt_ioscale = 1;
mp->mnt_ioflags = 0;
mp->mnt_realrootvp = NULLVP;
mp->mnt_authcache_ttl = CACHED_LOOKUP_RIGHT_TTL;
TAILQ_INIT(&mp->mnt_vnodelist);
TAILQ_INIT(&mp->mnt_workerqueue);
TAILQ_INIT(&mp->mnt_newvnodes);
mount_lock_init(mp);
lck_rw_lock_exclusive(&mp->mnt_rwlock);
is_rwlock_locked = TRUE;
mp->mnt_op = vfsp->vfc_vfsops;
mp->mnt_vtable = vfsp;
mp->mnt_flag |= vfsp->vfc_flags & MNT_VISFLAGMASK;
strncpy(mp->mnt_vfsstat.f_fstypename, vfsp->vfc_name, MFSTYPENAMELEN);
strncpy(mp->mnt_vfsstat.f_mntonname, nd.ni_cnd.cn_pnbuf, MAXPATHLEN);
mp->mnt_vnodecovered = vp;
mp->mnt_vfsstat.f_owner = kauth_cred_getuid(vfs_context_ucred(ctx));
mp->mnt_devbsdunit = LOWPRI_MAX_NUM_DEV - 1;
vfs_setowner(mp, KAUTH_UID_NONE, KAUTH_GID_NONE);
update:
if (uap->flags & MNT_RDONLY)
mp->mnt_flag |= MNT_RDONLY;
else if (mp->mnt_flag & MNT_RDONLY)
mp->mnt_kern_flag |= MNTK_WANTRDWR;
mp->mnt_flag &= ~(MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC |
MNT_UNKNOWNPERMISSIONS | MNT_DONTBROWSE | MNT_AUTOMOUNTED |
MNT_DEFWRITE | MNT_NOATIME | MNT_QUARANTINE | MNT_CPROTECT );
mp->mnt_flag |= uap->flags & (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC |
MNT_UNKNOWNPERMISSIONS | MNT_DONTBROWSE | MNT_AUTOMOUNTED |
MNT_DEFWRITE | MNT_NOATIME | MNT_QUARANTINE | MNT_CPROTECT );
#if CONFIG_MACF
if (uap->flags & MNT_MULTILABEL) {
if (vfsp->vfc_vfsflags & VFC_VFSNOMACLABEL) {
error = EINVAL;
goto out1;
}
mp->mnt_flag |= MNT_MULTILABEL;
}
#endif
if (vfsp->vfc_vfsflags & VFC_VFSLOCALARGS) {
if (is_64bit) {
if ( (error = copyin(fsmountargs, (caddr_t)&devpath, sizeof(devpath))) )
goto out1;
fsmountargs += sizeof(devpath);
} else {
user32_addr_t tmp;
if ( (error = copyin(fsmountargs, (caddr_t)&tmp, sizeof(tmp))) )
goto out1;
devpath = CAST_USER_ADDR_T(tmp);
fsmountargs += sizeof(tmp);
}
if ((devpath)) {
NDINIT(&nd1, LOOKUP, FOLLOW, UIO_USERSPACE, devpath, ctx);
if ( (error = namei(&nd1)) )
goto out1;
strncpy(mp->mnt_vfsstat.f_mntfromname, nd1.ni_cnd.cn_pnbuf, MAXPATHLEN);
devvp = nd1.ni_vp;
nameidone(&nd1);
if (devvp->v_type != VBLK) {
error = ENOTBLK;
goto out2;
}
if (major(devvp->v_rdev) >= nblkdev) {
error = ENXIO;
goto out2;
}
if (suser(vfs_context_ucred(ctx), NULL) != 0) {
accessmode = KAUTH_VNODE_READ_DATA;
if ((mp->mnt_flag & MNT_RDONLY) == 0)
accessmode |= KAUTH_VNODE_WRITE_DATA;
if ((error = vnode_authorize(devvp, NULL, accessmode, ctx)) != 0)
goto out2;
}
}
if (devpath && ((uap->flags & MNT_UPDATE) == 0)) {
if ( (error = vnode_ref(devvp)) )
goto out2;
if ( (error = vfs_mountedon(devvp)) )
goto out3;
if (vcount(devvp) > 1 && !(vfs_flags(mp) & MNT_ROOTFS)) {
error = EBUSY;
goto out3;
}
if ( (error = VNOP_FSYNC(devvp, MNT_WAIT, ctx)) ) {
error = ENOTBLK;
goto out3;
}
if ( (error = buf_invalidateblks(devvp, BUF_WRITE_DATA, 0, 0)) )
goto out3;
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
#if CONFIG_MACF
error = mac_vnode_check_open(ctx,
devvp,
ronly ? FREAD : FREAD|FWRITE);
if (error)
goto out3;
#endif
if ( (error = VNOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, ctx)) )
goto out3;
mp->mnt_devvp = devvp;
device_vnode = devvp;
} else {
if ((mp->mnt_flag & MNT_RDONLY) && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
dev_t dev;
int maj;
device_vnode = mp->mnt_devvp;
if (device_vnode) {
vnode_getalways(device_vnode);
if (suser(vfs_context_ucred(ctx), NULL)) {
if ((error = vnode_authorize(device_vnode, NULL,
KAUTH_VNODE_READ_DATA | KAUTH_VNODE_WRITE_DATA, ctx)) != 0) {
vnode_put(device_vnode);
goto out2;
}
}
dev = (dev_t)device_vnode->v_rdev;
maj = major(dev);
if ((u_int)maj >= (u_int)nblkdev)
panic("Volume mounted on a device with invalid major number.\n");
error = bdevsw[maj].d_open(dev, FREAD | FWRITE, S_IFBLK, p);
vnode_put(device_vnode);
if (error != 0) {
goto out2;
}
}
}
device_vnode = NULLVP;
}
}
#if CONFIG_MACF
if ((uap->flags & MNT_UPDATE) == 0) {
mac_mount_label_init(mp);
mac_mount_label_associate(ctx, mp);
}
if (uap->mac_p != USER_ADDR_NULL) {
struct user_mac mac;
char *labelstr = NULL;
size_t ulen = 0;
if ((uap->flags & MNT_UPDATE) != 0) {
error = mac_mount_check_label_update(
ctx, mp);
if (error != 0)
goto out3;
}
if (is_64bit) {
error = copyin(uap->mac_p, &mac, sizeof(mac));
} else {
struct mac mac32;
error = copyin(uap->mac_p, &mac32, sizeof(mac32));
mac.m_buflen = mac32.m_buflen;
mac.m_string = CAST_USER_ADDR_T(mac32.m_string);
}
if (error != 0)
goto out3;
if ((mac.m_buflen > MAC_MAX_LABEL_BUF_LEN) ||
(mac.m_buflen < 2)) {
error = EINVAL;
goto out3;
}
MALLOC(labelstr, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
error = copyinstr(mac.m_string, labelstr, mac.m_buflen, &ulen);
if (error != 0) {
FREE(labelstr, M_MACTEMP);
goto out3;
}
AUDIT_ARG(mac_string, labelstr);
error = mac_mount_label_internalize(mp->mnt_mntlabel, labelstr);
FREE(labelstr, M_MACTEMP);
if (error != 0)
goto out3;
}
#endif
if (device_vnode != NULL) {
VNOP_IOCTL(device_vnode, DKIOCGETBSDUNIT, (caddr_t)&mp->mnt_devbsdunit, 0, NULL);
mp->mnt_devbsdunit %= LOWPRI_MAX_NUM_DEV;
}
error = VFS_MOUNT(mp, device_vnode, fsmountargs, ctx);
if (uap->flags & MNT_UPDATE) {
if (mp->mnt_kern_flag & MNTK_WANTRDWR)
mp->mnt_flag &= ~MNT_RDONLY;
mp->mnt_flag &=~
(MNT_UPDATE | MNT_RELOAD | MNT_FORCE);
mp->mnt_kern_flag &=~ MNTK_WANTRDWR;
if (error)
mp->mnt_flag = flag;
vfs_event_signal(NULL, VQ_UPDATE, (intptr_t)NULL);
lck_rw_done(&mp->mnt_rwlock);
is_rwlock_locked = FALSE;
if (!error)
enablequotas(mp, ctx);
goto out2;
}
if (error == 0) {
struct vfs_attr vfsattr;
#if CONFIG_MACF
if (vfs_flags(mp) & MNT_MULTILABEL) {
error = VFS_ROOT(mp, &rvp, ctx);
if (error) {
printf("%s() VFS_ROOT returned %d\n", __func__, error);
goto out3;
}
error = vnode_label(mp, NULL, rvp, NULL, 0, ctx);
vnode_put(rvp);
if (error)
goto out3;
}
#endif
vnode_lock_spin(vp);
CLR(vp->v_flag, VMOUNT);
vp->v_mountedhere = mp;
vnode_unlock(vp);
name_cache_lock();
mount_generation++;
name_cache_unlock();
error = vnode_ref(vp);
if (error != 0) {
goto out4;
}
have_usecount = TRUE;
error = checkdirs(vp, ctx);
if (error != 0) {
goto out4;
}
(void)VFS_START(mp, 0, ctx);
error = mount_list_add(mp);
if (error != 0) {
goto out4;
}
lck_rw_done(&mp->mnt_rwlock);
is_rwlock_locked = FALSE;
VFSATTR_INIT(&vfsattr);
VFSATTR_WANTED(&vfsattr, f_capabilities);
if (strncmp(mp->mnt_vfsstat.f_fstypename, "webdav", sizeof("webdav")) != 0 &&
vfs_getattr(mp, &vfsattr, ctx) == 0 &&
VFSATTR_IS_SUPPORTED(&vfsattr, f_capabilities)) {
if ((vfsattr.f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] & VOL_CAP_INT_EXTENDED_ATTR) &&
(vfsattr.f_capabilities.valid[VOL_CAPABILITIES_INTERFACES] & VOL_CAP_INT_EXTENDED_ATTR)) {
mp->mnt_kern_flag |= MNTK_EXTENDED_ATTRS;
}
#if NAMEDSTREAMS
if ((vfsattr.f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] & VOL_CAP_INT_NAMEDSTREAMS) &&
(vfsattr.f_capabilities.valid[VOL_CAPABILITIES_INTERFACES] & VOL_CAP_INT_NAMEDSTREAMS)) {
mp->mnt_kern_flag |= MNTK_NAMED_STREAMS;
}
#endif
if ((vfsattr.f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] & VOL_CAP_FMT_PATH_FROM_ID) &&
(vfsattr.f_capabilities.valid[VOL_CAPABILITIES_FORMAT] & VOL_CAP_FMT_PATH_FROM_ID)) {
mp->mnt_kern_flag |= MNTK_PATH_FROM_ID;
} else if (mp->mnt_flag & MNT_DOVOLFS) {
mp->mnt_kern_flag |= MNTK_PATH_FROM_ID;
}
}
if (mp->mnt_vtable->vfc_vfsflags & VFC_VFSNATIVEXATTR) {
mp->mnt_kern_flag |= MNTK_EXTENDED_ATTRS;
}
if (mp->mnt_vtable->vfc_vfsflags & VFC_VFSPREFLIGHT) {
mp->mnt_kern_flag |= MNTK_UNMOUNT_PREFLIGHT;
}
OSAddAtomic(1, &vfs_nummntops);
enablequotas(mp, ctx);
if (device_vnode) {
device_vnode->v_specflags |= SI_MOUNTEDON;
vfs_init_io_attributes(device_vnode, mp);
}
vfs_event_signal(NULL, VQ_MOUNT, (intptr_t)NULL);
} else {
vnode_lock_spin(vp);
CLR(vp->v_flag, VMOUNT);
vnode_unlock(vp);
mount_list_lock();
mp->mnt_vtable->vfc_refcount--;
mount_list_unlock();
if (device_vnode ) {
vnode_rele(device_vnode);
VNOP_CLOSE(device_vnode, ronly ? FREAD : FREAD|FWRITE, ctx);
}
lck_rw_done(&mp->mnt_rwlock);
is_rwlock_locked = FALSE;
mount_lock_destroy(mp);
#if CONFIG_MACF
mac_mount_label_destroy(mp);
#endif
FREE_ZONE((caddr_t)mp, sizeof (struct mount), M_MOUNT);
}
nameidone(&nd);
if (devpath && devvp)
vnode_put(devvp);
vnode_put(vp);
post_event_if_success(pvp, error, NOTE_WRITE);
vnode_put(pvp);
return(error);
out4:
(void)VFS_UNMOUNT(mp, MNT_FORCE, ctx);
if (device_vnode != NULLVP) {
vnode_rele(device_vnode);
VNOP_CLOSE(device_vnode, mp->mnt_flag & MNT_RDONLY ? FREAD : FREAD|FWRITE,
ctx);
did_rele = TRUE;
}
vnode_lock_spin(vp);
vp->v_mountedhere = (mount_t) 0;
vnode_unlock(vp);
if (have_usecount) {
vnode_rele(vp);
}
out3:
if (devpath && ((uap->flags & MNT_UPDATE) == 0) && (!did_rele))
vnode_rele(devvp);
out2:
if (devpath && devvp)
vnode_put(devvp);
out1:
if (is_rwlock_locked == TRUE) {
lck_rw_done(&mp->mnt_rwlock);
}
if (mntalloc) {
#if CONFIG_MACF
mac_mount_label_destroy(mp);
#endif
FREE_ZONE((caddr_t)mp, sizeof (struct mount), M_MOUNT);
}
if (vfsp_ref) {
mount_list_lock();
vfsp->vfc_refcount--;
mount_list_unlock();
}
vnode_put(vp);
vnode_put(pvp);
nameidone(&nd);
return(error);
}
#ifdef CONFIG_IMGSRC_ACCESS
static int
prepare_coveredvp(vnode_t vp, vfs_context_t ctx, struct componentname *cnp, const char *fsname)
{
struct vnode_attr va;
int error;
VATTR_INIT(&va);
VATTR_WANTED(&va, va_uid);
if ((error = vnode_getattr(vp, &va, ctx)) ||
(va.va_uid != kauth_cred_getuid(vfs_context_ucred(ctx)) &&
(!vfs_context_issuser(ctx)))) {
error = EPERM;
goto out;
}
if ( (error = VNOP_FSYNC(vp, MNT_WAIT, ctx)) )
goto out;
if ( (error = buf_invalidateblks(vp, BUF_WRITE_DATA, 0, 0)) )
goto out;
if (vp->v_type != VDIR) {
error = ENOTDIR;
goto out;
}
if (ISSET(vp->v_flag, VMOUNT) && (vp->v_mountedhere != NULL)) {
error = EBUSY;
goto out;
}
#if CONFIG_MACF
error = mac_mount_check_mount(ctx, vp,
cnp, fsname);
if (error != 0)
goto out;
#endif
vnode_lock_spin(vp);
SET(vp->v_flag, VMOUNT);
vnode_unlock(vp);
out:
return error;
}
static int
authorize_devpath_and_update_mntfromname(mount_t mp, user_addr_t devpath, vnode_t *devvpp, vfs_context_t ctx)
{
struct nameidata nd;
vnode_t vp;
mode_t accessmode;
int error;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, devpath, ctx);
if ( (error = namei(&nd)) )
return error;
strncpy(mp->mnt_vfsstat.f_mntfromname, nd.ni_cnd.cn_pnbuf, MAXPATHLEN);
vp = nd.ni_vp;
nameidone(&nd);
if (vp->v_type != VBLK) {
error = ENOTBLK;
goto out;
}
if (major(vp->v_rdev) >= nblkdev) {
error = ENXIO;
goto out;
}
if (!vfs_context_issuser(ctx)) {
accessmode = KAUTH_VNODE_READ_DATA;
if ((mp->mnt_flag & MNT_RDONLY) == 0)
accessmode |= KAUTH_VNODE_WRITE_DATA;
if ((error = vnode_authorize(vp, NULL, accessmode, ctx)) != 0)
goto out;
}
*devvpp = vp;
out:
if (error) {
vnode_put(vp);
}
return error;
}
static int
place_mount_and_checkdirs(mount_t mp, vnode_t vp, vfs_context_t ctx)
{
int error;
mp->mnt_vnodecovered = vp;
vnode_lock_spin(vp);
CLR(vp->v_flag, VMOUNT);
vp->v_mountedhere = mp;
vnode_unlock(vp);
name_cache_lock();
mount_generation++;
name_cache_unlock();
error = vnode_ref(vp);
if (error != 0) {
goto out;
}
error = checkdirs(vp, ctx);
if (error != 0) {
vnode_rele(vp);
goto out;
}
out:
if (error != 0) {
mp->mnt_vnodecovered = NULLVP;
}
return error;
}
static void
undo_place_on_covered_vp(mount_t mp, vnode_t vp)
{
vnode_rele(vp);
vnode_lock_spin(vp);
vp->v_mountedhere = (mount_t)NULL;
vnode_unlock(vp);
mp->mnt_vnodecovered = NULLVP;
}
static int
mount_begin_update(mount_t mp, vfs_context_t ctx, int flags)
{
int error;
mount_lock_spin(mp);
if (mp->mnt_lflag & MNT_LUNMOUNT) {
mount_unlock(mp);
return EBUSY;
}
mount_unlock(mp);
lck_rw_lock_exclusive(&mp->mnt_rwlock);
if ((flags & MNT_RELOAD) &&
((mp->mnt_flag & MNT_RDONLY) == 0)) {
error = ENOTSUP;
goto out;
}
if (mp->mnt_vfsstat.f_owner != kauth_cred_getuid(vfs_context_ucred(ctx)) &&
(!vfs_context_issuser(ctx))) {
error = EPERM;
goto out;
}
#if CONFIG_MACF
error = mac_mount_check_remount(ctx, mp);
if (error != 0) {
goto out;
}
#endif
out:
if (error) {
lck_rw_done(&mp->mnt_rwlock);
}
return error;
}
static void
mount_end_update(mount_t mp)
{
lck_rw_done(&mp->mnt_rwlock);
}
static int
relocate_imageboot_source(vnode_t vp, struct componentname *cnp,
const char *fsname, vfs_context_t ctx,
boolean_t is64bit, user_addr_t fsmountargs)
{
int error;
mount_t mp;
boolean_t placed = FALSE;
vnode_t devvp;
struct vfstable *vfsp;
user_addr_t devpath;
char *old_mntonname;
if (imgsrc_rootvnode == NULLVP) {
return EINVAL;
}
if (!vfs_context_issuser(ctx)) {
return EPERM;
}
error = vnode_get(imgsrc_rootvnode);
if (error != 0) {
return error;
}
MALLOC(old_mntonname, char*, MAXPATHLEN, M_TEMP, M_WAITOK);
mp = vnode_mount(imgsrc_rootvnode);
if ((mp->mnt_kern_flag & MNTK_HAS_MOVED) == MNTK_HAS_MOVED) {
error = EBUSY;
goto out0;
}
error = mount_begin_update(mp , ctx, 0);
if (error != 0) {
goto out0;
}
if ((mp->mnt_kern_flag & MNTK_HAS_MOVED) == MNTK_HAS_MOVED) {
goto out1;
}
error = prepare_coveredvp(vp, ctx, cnp, fsname);
if (error != 0) {
goto out1;
}
vfsp = mp->mnt_vtable;
if (strncmp(vfsp->vfc_name, fsname, MFSNAMELEN) != 0) {
error = EINVAL;
goto out2;
}
if (vfsp->vfc_vfsflags & VFC_VFSLOCALARGS) {
if (is64bit) {
if ( (error = copyin(fsmountargs, (caddr_t)&devpath, sizeof(devpath))) )
goto out2;
fsmountargs += sizeof(devpath);
} else {
user32_addr_t tmp;
if ( (error = copyin(fsmountargs, (caddr_t)&tmp, sizeof(tmp))) )
goto out2;
devpath = CAST_USER_ADDR_T(tmp);
fsmountargs += sizeof(tmp);
}
if (devpath != USER_ADDR_NULL) {
error = authorize_devpath_and_update_mntfromname(mp, devpath, &devvp, ctx);
if (error) {
goto out2;
}
vnode_put(devvp);
}
}
error = place_mount_and_checkdirs(mp, vp, ctx);
if (error != 0) {
goto out2;
}
placed = TRUE;
strncpy(old_mntonname, mp->mnt_vfsstat.f_mntonname, MAXPATHLEN);
strncpy(mp->mnt_vfsstat.f_mntonname, cnp->cn_pnbuf, MAXPATHLEN);
mount_lock(mp);
mp->mnt_kern_flag |= MNTK_HAS_MOVED;
mount_unlock(mp);
error = mount_list_add(mp);
if (error != 0) {
goto out3;
}
mount_end_update(mp);
vnode_put(imgsrc_rootvnode);
FREE(old_mntonname, M_TEMP);
return 0;
out3:
strncpy(mp->mnt_vfsstat.f_mntonname, old_mntonname, MAXPATHLEN);
mount_lock(mp);
mp->mnt_kern_flag &= ~(MNTK_HAS_MOVED);
mount_unlock(mp);
out2:
if (placed) {
undo_place_on_covered_vp(mp, vp);
} else {
vnode_lock_spin(vp);
CLR(vp->v_flag, VMOUNT);
vnode_unlock(vp);
}
out1:
mount_end_update(mp);
out0:
vnode_put(imgsrc_rootvnode);
FREE(old_mntonname, M_TEMP);
return error;
}
#endif
void
enablequotas(struct mount *mp, vfs_context_t ctx)
{
struct nameidata qnd;
int type;
char qfpath[MAXPATHLEN];
const char *qfname = QUOTAFILENAME;
const char *qfopsname = QUOTAOPSNAME;
const char *qfextension[] = INITQFNAMES;
if (strncmp(mp->mnt_vfsstat.f_fstypename, "hfs", sizeof("hfs")) != 0 ) {
return;
}
for (type=0; type < MAXQUOTAS; type++) {
snprintf(qfpath, sizeof(qfpath), "%s/%s.%s", mp->mnt_vfsstat.f_mntonname, qfopsname, qfextension[type]);
NDINIT(&qnd, LOOKUP, FOLLOW, UIO_SYSSPACE, CAST_USER_ADDR_T(qfpath), ctx);
if (namei(&qnd) != 0)
continue;
vnode_put(qnd.ni_vp);
nameidone(&qnd);
snprintf(qfpath, sizeof(qfpath), "%s/%s.%s", mp->mnt_vfsstat.f_mntonname, qfname, qfextension[type]);
(void) VFS_QUOTACTL(mp, QCMD(Q_QUOTAON, type), 0, qfpath, ctx);
}
return;
}
static int
checkdirs_callback(proc_t p, void * arg)
{
struct cdirargs * cdrp = (struct cdirargs * )arg;
vnode_t olddp = cdrp->olddp;
vnode_t newdp = cdrp->newdp;
struct filedesc *fdp;
vnode_t tvp;
vnode_t fdp_cvp;
vnode_t fdp_rvp;
int cdir_changed = 0;
int rdir_changed = 0;
proc_fdlock(p);
fdp = p->p_fd;
if (fdp == (struct filedesc *)0) {
proc_fdunlock(p);
return(PROC_RETURNED);
}
fdp_cvp = fdp->fd_cdir;
fdp_rvp = fdp->fd_rdir;
proc_fdunlock(p);
if (fdp_cvp == olddp) {
vnode_ref(newdp);
tvp = fdp->fd_cdir;
fdp_cvp = newdp;
cdir_changed = 1;
vnode_rele(tvp);
}
if (fdp_rvp == olddp) {
vnode_ref(newdp);
tvp = fdp->fd_rdir;
fdp_rvp = newdp;
rdir_changed = 1;
vnode_rele(tvp);
}
if (cdir_changed || rdir_changed) {
proc_fdlock(p);
fdp->fd_cdir = fdp_cvp;
fdp->fd_rdir = fdp_rvp;
proc_fdunlock(p);
}
return(PROC_RETURNED);
}
static int
checkdirs(vnode_t olddp, vfs_context_t ctx)
{
vnode_t newdp;
vnode_t tvp;
int err;
struct cdirargs cdr;
struct uthread * uth = get_bsdthread_info(current_thread());
if (olddp->v_usecount == 1)
return(0);
if (uth != (struct uthread *)0)
uth->uu_notrigger = 1;
err = VFS_ROOT(olddp->v_mountedhere, &newdp, ctx);
if (uth != (struct uthread *)0)
uth->uu_notrigger = 0;
if (err != 0) {
#if DIAGNOSTIC
panic("mount: lost mount: error %d", err);
#endif
return(err);
}
cdr.olddp = olddp;
cdr.newdp = newdp;
proc_iterate(PROC_ALLPROCLIST | PROC_NOWAITTRANS, checkdirs_callback, (void *)&cdr, NULL, NULL);
if (rootvnode == olddp) {
vnode_ref(newdp);
tvp = rootvnode;
rootvnode = newdp;
vnode_rele(tvp);
}
vnode_put(newdp);
return(0);
}
int
unmount(__unused proc_t p, struct unmount_args *uap, __unused int32_t *retval)
{
vnode_t vp;
struct mount *mp;
int error;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
NDINIT(&nd, LOOKUP, NOTRIGGER | FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
mp = vp->v_mount;
nameidone(&nd);
#if CONFIG_MACF
error = mac_mount_check_umount(ctx, mp);
if (error != 0) {
vnode_put(vp);
return (error);
}
#endif
if ((vp->v_flag & VROOT) == 0) {
vnode_put(vp);
return (EINVAL);
}
mount_ref(mp, 0);
vnode_put(vp);
return (safedounmount(mp, uap->flags, ctx));
}
int
vfs_unmountbyfsid(fsid_t * fsid, int flags, vfs_context_t ctx)
{
mount_t mp;
mp = mount_list_lookupby_fsid(fsid, 0, 1);
if (mp == (mount_t)0) {
return(ENOENT);
}
mount_ref(mp, 0);
mount_iterdrop(mp);
return(safedounmount(mp, flags, ctx));
}
int
safedounmount(struct mount *mp, int flags, vfs_context_t ctx)
{
int error;
proc_t p = vfs_context_proc(ctx);
if ((mp->mnt_vfsstat.f_owner != kauth_cred_getuid(kauth_cred_get())) &&
(error = suser(kauth_cred_get(), &p->p_acflag)))
goto out;
if (mp->mnt_flag & MNT_ROOTFS) {
error = EBUSY;
goto out;
}
#ifdef CONFIG_IMGSRC_ACCESS
if (mp->mnt_kern_flag & MNTK_BACKS_ROOT) {
error = EBUSY;
goto out;
}
#endif
return (dounmount(mp, flags, 1, ctx));
out:
mount_drop(mp, 0);
return(error);
}
int
dounmount(struct mount *mp, int flags, int withref, vfs_context_t ctx)
{
vnode_t coveredvp = (vnode_t)0;
int error;
int needwakeup = 0;
int forcedunmount = 0;
int lflags = 0;
struct vnode *devvp = NULLVP;
if (flags & MNT_FORCE)
forcedunmount = 1;
mount_lock(mp);
if ((flags & MNT_FORCE)) {
mp->mnt_kern_flag |= MNTK_FRCUNMOUNT;
mp->mnt_lflag |= MNT_LFORCE;
}
if (mp->mnt_lflag & MNT_LUNMOUNT) {
mp->mnt_lflag |= MNT_LWAIT;
if(withref != 0)
mount_drop(mp, 1);
msleep((caddr_t)mp, &mp->mnt_mlock, (PVFS | PDROP), "dounmount", NULL);
return (EBUSY);
}
mp->mnt_kern_flag |= MNTK_UNMOUNT;
mp->mnt_lflag |= MNT_LUNMOUNT;
mp->mnt_flag &=~ MNT_ASYNC;
mp->mnt_realrootvp = NULLVP;
mount_unlock(mp);
name_cache_lock();
mount_generation++;
name_cache_unlock();
lck_rw_lock_exclusive(&mp->mnt_rwlock);
if (withref != 0)
mount_drop(mp, 0);
#if CONFIG_FSE
fsevent_unmount(mp);
#endif
error = 0;
if (forcedunmount == 0) {
ubc_umount(mp);
if ((mp->mnt_flag & MNT_RDONLY) == 0) {
error = VFS_SYNC(mp, MNT_WAIT, ctx);
if (error) {
mount_lock(mp);
mp->mnt_kern_flag &= ~MNTK_UNMOUNT;
mp->mnt_lflag &= ~MNT_LUNMOUNT;
mp->mnt_lflag &= ~MNT_LFORCE;
goto out;
}
}
}
if (forcedunmount)
lflags |= FORCECLOSE;
error = vflush(mp, NULLVP, SKIPSWAP | SKIPSYSTEM | SKIPROOT | lflags);
if ((forcedunmount == 0) && error) {
mount_lock(mp);
mp->mnt_kern_flag &= ~MNTK_UNMOUNT;
mp->mnt_lflag &= ~MNT_LUNMOUNT;
mp->mnt_lflag &= ~MNT_LFORCE;
goto out;
}
mount_iterdrain(mp);
error = VFS_UNMOUNT(mp, flags, ctx);
if (error) {
mount_iterreset(mp);
mount_lock(mp);
mp->mnt_kern_flag &= ~MNTK_UNMOUNT;
mp->mnt_lflag &= ~MNT_LUNMOUNT;
mp->mnt_lflag &= ~MNT_LFORCE;
goto out;
}
if (!error)
OSAddAtomic(1, &vfs_nummntops);
if ( mp->mnt_devvp && mp->mnt_vtable->vfc_vfsflags & VFC_VFSLOCALARGS) {
devvp = mp->mnt_devvp;
vnode_getalways(devvp);
vnode_rele(devvp);
VNOP_CLOSE(devvp, mp->mnt_flag & MNT_RDONLY ? FREAD : FREAD|FWRITE,
ctx);
vnode_clearmountedon(devvp);
vnode_put(devvp);
}
lck_rw_done(&mp->mnt_rwlock);
mount_list_remove(mp);
lck_rw_lock_exclusive(&mp->mnt_rwlock);
if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {
vnode_getwithref(coveredvp);
vnode_lock_spin(coveredvp);
coveredvp->v_mountedhere = (struct mount *)0;
vnode_unlock(coveredvp);
vnode_put(coveredvp);
}
mount_list_lock();
mp->mnt_vtable->vfc_refcount--;
mount_list_unlock();
cache_purgevfs(mp);
vfs_event_signal(NULL, VQ_UNMOUNT, (intptr_t)NULL);
mount_lock(mp);
mp->mnt_lflag |= MNT_LDEAD;
if (mp->mnt_lflag & MNT_LWAIT) {
mp->mnt_lflag &= ~MNT_LWAIT;
wakeup((caddr_t)mp);
}
mount_refdrain(mp);
out:
if (mp->mnt_lflag & MNT_LWAIT) {
mp->mnt_lflag &= ~MNT_LWAIT;
needwakeup = 1;
}
mount_unlock(mp);
lck_rw_done(&mp->mnt_rwlock);
if (needwakeup)
wakeup((caddr_t)mp);
if (!error) {
if ((coveredvp != NULLVP)) {
vnode_t pvp;
vnode_getwithref(coveredvp);
pvp = vnode_getparent(coveredvp);
vnode_rele(coveredvp);
vnode_lock_spin(coveredvp);
if(mp->mnt_crossref == 0) {
vnode_unlock(coveredvp);
mount_lock_destroy(mp);
#if CONFIG_MACF
mac_mount_label_destroy(mp);
#endif
FREE_ZONE((caddr_t)mp, sizeof (struct mount), M_MOUNT);
} else {
coveredvp->v_lflag |= VL_MOUNTDEAD;
vnode_unlock(coveredvp);
}
vnode_put(coveredvp);
if (pvp) {
lock_vnode_and_post(pvp, NOTE_WRITE);
vnode_put(pvp);
}
} else if (mp->mnt_flag & MNT_ROOTFS) {
mount_lock_destroy(mp);
#if CONFIG_MACF
mac_mount_label_destroy(mp);
#endif
FREE_ZONE((caddr_t)mp, sizeof (struct mount), M_MOUNT);
} else
panic("dounmount: no coveredvp");
}
return (error);
}
void
mount_dropcrossref(mount_t mp, vnode_t dp, int need_put)
{
vnode_lock(dp);
mp->mnt_crossref--;
if (mp->mnt_crossref < 0)
panic("mount cross refs -ve");
if (((dp->v_lflag & VL_MOUNTDEAD) == VL_MOUNTDEAD) && (mp->mnt_crossref == 0)) {
dp->v_lflag &= ~VL_MOUNTDEAD;
if (need_put)
vnode_put_locked(dp);
vnode_unlock(dp);
mount_lock_destroy(mp);
#if CONFIG_MACF
mac_mount_label_destroy(mp);
#endif
FREE_ZONE((caddr_t)mp, sizeof (struct mount), M_MOUNT);
return;
}
if (need_put)
vnode_put_locked(dp);
vnode_unlock(dp);
}
#if DIAGNOSTIC
int syncprt = 0;
struct ctldebug debug0 = { "syncprt", &syncprt };
#endif
int print_vmpage_stat=0;
static int
sync_callback(mount_t mp, void * arg)
{
int asyncflag;
if ((mp->mnt_flag & MNT_RDONLY) == 0) {
asyncflag = mp->mnt_flag & MNT_ASYNC;
mp->mnt_flag &= ~MNT_ASYNC;
VFS_SYNC(mp, arg ? MNT_WAIT : MNT_NOWAIT, vfs_context_current());
if (asyncflag)
mp->mnt_flag |= MNT_ASYNC;
}
return(VFS_RETURNED);
}
#include <kern/clock.h>
clock_sec_t sync_wait_time = 0;
int
sync(__unused proc_t p, __unused struct sync_args *uap, __unused int32_t *retval)
{
clock_nsec_t nsecs;
vfs_iterate(LK_NOWAIT, sync_callback, (void *)0);
{
static fsid_t fsid = { { 0, 0 } };
clock_get_calendar_microtime(&sync_wait_time, &nsecs);
vfs_event_signal(&fsid, VQ_SYNCEVENT, (intptr_t)NULL);
wakeup((caddr_t)&sync_wait_time);
}
{
if(print_vmpage_stat) {
vm_countdirtypages();
}
}
#if DIAGNOSTIC
if (syncprt)
vfs_bufstats();
#endif
return (0);
}
#if QUOTA
static int quotactl_funneled(proc_t p, struct quotactl_args *uap, int32_t *retval);
int
quotactl(proc_t p, struct quotactl_args *uap, int32_t *retval)
{
boolean_t funnel_state;
int error;
funnel_state = thread_funnel_set(kernel_flock, TRUE);
error = quotactl_funneled(p, uap, retval);
thread_funnel_set(kernel_flock, funnel_state);
return(error);
}
static int
quotactl_funneled(proc_t p, struct quotactl_args *uap, __unused int32_t *retval)
{
struct mount *mp;
int error, quota_cmd, quota_status;
caddr_t datap;
size_t fnamelen;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
struct dqblk my_dqblk;
AUDIT_ARG(uid, uap->uid);
AUDIT_ARG(cmd, uap->cmd);
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
mp = nd.ni_vp->v_mount;
vnode_put(nd.ni_vp);
nameidone(&nd);
quota_cmd = uap->cmd >> SUBCMDSHIFT;
switch (quota_cmd) {
case Q_QUOTAON:
fnamelen = MAXPATHLEN;
datap = kalloc(MAXPATHLEN);
error = copyinstr(uap->arg, datap, MAXPATHLEN, &fnamelen);
break;
case Q_GETQUOTA:
datap = (caddr_t) &my_dqblk;
break;
case Q_SETQUOTA:
case Q_SETUSE:
datap = (caddr_t) &my_dqblk;
if (proc_is64bit(p)) {
struct user_dqblk my_dqblk64;
error = copyin(uap->arg, (caddr_t)&my_dqblk64, sizeof (my_dqblk64));
if (error == 0) {
munge_dqblk(&my_dqblk, &my_dqblk64, FALSE);
}
}
else {
error = copyin(uap->arg, (caddr_t)&my_dqblk, sizeof (my_dqblk));
}
break;
case Q_QUOTASTAT:
datap = (caddr_t) "a_status;
break;
default:
datap = NULL;
break;
}
if (error == 0) {
error = VFS_QUOTACTL(mp, uap->cmd, uap->uid, datap, ctx);
}
switch (quota_cmd) {
case Q_QUOTAON:
if (datap != NULL)
kfree(datap, MAXPATHLEN);
break;
case Q_GETQUOTA:
if (error == 0) {
if (proc_is64bit(p)) {
struct user_dqblk my_dqblk64;
munge_dqblk(&my_dqblk, &my_dqblk64, TRUE);
error = copyout((caddr_t)&my_dqblk64, uap->arg, sizeof (my_dqblk64));
}
else {
error = copyout(datap, uap->arg, sizeof (struct dqblk));
}
}
break;
case Q_QUOTASTAT:
if (error == 0) {
error = copyout(datap, uap->arg, sizeof(quota_status));
}
break;
default:
break;
}
return (error);
}
#else
int
quotactl(__unused proc_t p, __unused struct quotactl_args *uap, __unused int32_t *retval)
{
return (EOPNOTSUPP);
}
#endif
int
statfs(__unused proc_t p, struct statfs_args *uap, __unused int32_t *retval)
{
struct mount *mp;
struct vfsstatfs *sp;
int error;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
vnode_t vp;
NDINIT(&nd, LOOKUP, NOTRIGGER | FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
mp = vp->v_mount;
sp = &mp->mnt_vfsstat;
nameidone(&nd);
error = vfs_update_vfsstat(mp, ctx, VFS_USER_EVENT);
vnode_put(vp);
if (error != 0)
return (error);
error = munge_statfs(mp, sp, uap->buf, NULL, IS_64BIT_PROCESS(p), TRUE);
return (error);
}
int
fstatfs(__unused proc_t p, struct fstatfs_args *uap, __unused int32_t *retval)
{
vnode_t vp;
struct mount *mp;
struct vfsstatfs *sp;
int error;
AUDIT_ARG(fd, uap->fd);
if ( (error = file_vnode(uap->fd, &vp)) )
return (error);
error = vnode_getwithref(vp);
if (error) {
file_drop(uap->fd);
return (error);
}
AUDIT_ARG(vnpath_withref, vp, ARG_VNODE1);
mp = vp->v_mount;
if (!mp) {
error = EBADF;
goto out;
}
sp = &mp->mnt_vfsstat;
if ((error = vfs_update_vfsstat(mp,vfs_context_current(),VFS_USER_EVENT)) != 0) {
goto out;
}
error = munge_statfs(mp, sp, uap->buf, NULL, IS_64BIT_PROCESS(p), TRUE);
out:
file_drop(uap->fd);
vnode_put(vp);
return (error);
}
static int
statfs64_common(struct mount *mp, struct vfsstatfs *sfsp, user_addr_t bufp)
{
int error;
struct statfs64 sfs;
bzero(&sfs, sizeof(sfs));
sfs.f_bsize = sfsp->f_bsize;
sfs.f_iosize = (int32_t)sfsp->f_iosize;
sfs.f_blocks = sfsp->f_blocks;
sfs.f_bfree = sfsp->f_bfree;
sfs.f_bavail = sfsp->f_bavail;
sfs.f_files = sfsp->f_files;
sfs.f_ffree = sfsp->f_ffree;
sfs.f_fsid = sfsp->f_fsid;
sfs.f_owner = sfsp->f_owner;
sfs.f_type = mp->mnt_vtable->vfc_typenum;
sfs.f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
sfs.f_fssubtype = sfsp->f_fssubtype;
strlcpy(&sfs.f_fstypename[0], &sfsp->f_fstypename[0], MFSTYPENAMELEN);
strlcpy(&sfs.f_mntonname[0], &sfsp->f_mntonname[0], MAXPATHLEN);
strlcpy(&sfs.f_mntfromname[0], &sfsp->f_mntfromname[0], MAXPATHLEN);
error = copyout((caddr_t)&sfs, bufp, sizeof(sfs));
return(error);
}
int
statfs64(__unused struct proc *p, struct statfs64_args *uap, __unused int32_t *retval)
{
struct mount *mp;
struct vfsstatfs *sp;
int error;
struct nameidata nd;
vfs_context_t ctxp = vfs_context_current();
vnode_t vp;
NDINIT(&nd, LOOKUP, NOTRIGGER | FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctxp);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
mp = vp->v_mount;
sp = &mp->mnt_vfsstat;
nameidone(&nd);
error = vfs_update_vfsstat(mp, ctxp, VFS_USER_EVENT);
vnode_put(vp);
if (error != 0)
return (error);
error = statfs64_common(mp, sp, uap->buf);
return (error);
}
int
fstatfs64(__unused struct proc *p, struct fstatfs64_args *uap, __unused int32_t *retval)
{
struct vnode *vp;
struct mount *mp;
struct vfsstatfs *sp;
int error;
AUDIT_ARG(fd, uap->fd);
if ( (error = file_vnode(uap->fd, &vp)) )
return (error);
error = vnode_getwithref(vp);
if (error) {
file_drop(uap->fd);
return (error);
}
AUDIT_ARG(vnpath_withref, vp, ARG_VNODE1);
mp = vp->v_mount;
if (!mp) {
error = EBADF;
goto out;
}
sp = &mp->mnt_vfsstat;
if ((error = vfs_update_vfsstat(mp, vfs_context_current(), VFS_USER_EVENT)) != 0) {
goto out;
}
error = statfs64_common(mp, sp, uap->buf);
out:
file_drop(uap->fd);
vnode_put(vp);
return (error);
}
struct getfsstat_struct {
user_addr_t sfsp;
user_addr_t *mp;
int count;
int maxcount;
int flags;
int error;
};
static int
getfsstat_callback(mount_t mp, void * arg)
{
struct getfsstat_struct *fstp = (struct getfsstat_struct *)arg;
struct vfsstatfs *sp;
int error, my_size;
vfs_context_t ctx = vfs_context_current();
if (fstp->sfsp && fstp->count < fstp->maxcount) {
sp = &mp->mnt_vfsstat;
if (((fstp->flags & MNT_NOWAIT) == 0 || (fstp->flags & (MNT_WAIT | MNT_DWAIT))) &&
(error = vfs_update_vfsstat(mp, ctx,
VFS_USER_EVENT))) {
KAUTH_DEBUG("vfs_update_vfsstat returned %d", error);
return(VFS_RETURNED);
}
error = munge_statfs(mp, sp, fstp->sfsp, &my_size, IS_64BIT_PROCESS(vfs_context_proc(ctx)), FALSE);
if (error) {
fstp->error = error;
return(VFS_RETURNED_DONE);
}
fstp->sfsp += my_size;
if (fstp->mp) {
error = mac_mount_label_get(mp, *fstp->mp);
if (error) {
fstp->error = error;
return(VFS_RETURNED_DONE);
}
fstp->mp++;
}
}
fstp->count++;
return(VFS_RETURNED);
}
int
getfsstat(__unused proc_t p, struct getfsstat_args *uap, int *retval)
{
struct __mac_getfsstat_args muap;
muap.buf = uap->buf;
muap.bufsize = uap->bufsize;
muap.mac = USER_ADDR_NULL;
muap.macsize = 0;
muap.flags = uap->flags;
return (__mac_getfsstat(p, &muap, retval));
}
int
__mac_getfsstat(__unused proc_t p, struct __mac_getfsstat_args *uap, int *retval)
{
user_addr_t sfsp;
user_addr_t *mp;
size_t count, maxcount, bufsize, macsize;
struct getfsstat_struct fst;
bufsize = (size_t) uap->bufsize;
macsize = (size_t) uap->macsize;
if (IS_64BIT_PROCESS(p)) {
maxcount = bufsize / sizeof(struct user64_statfs);
}
else {
maxcount = bufsize / sizeof(struct user32_statfs);
}
sfsp = uap->buf;
count = 0;
mp = NULL;
#if CONFIG_MACF
if (uap->mac != USER_ADDR_NULL) {
u_int32_t *mp0;
int error;
unsigned int i;
count = (macsize / (IS_64BIT_PROCESS(p) ? 8 : 4));
if (count != maxcount)
return (EINVAL);
MALLOC(mp0, u_int32_t *, macsize, M_MACTEMP, M_WAITOK);
if (mp0 == NULL) {
return (ENOMEM);
}
error = copyin(uap->mac, mp0, macsize);
if (error) {
FREE(mp0, M_MACTEMP);
return (error);
}
MALLOC(mp, user_addr_t *, count * sizeof(user_addr_t), M_MACTEMP, M_WAITOK);
if (mp == NULL) {
FREE(mp0, M_MACTEMP);
return (ENOMEM);
}
for (i = 0; i < count; i++) {
if (IS_64BIT_PROCESS(p))
mp[i] = ((user_addr_t *)mp0)[i];
else
mp[i] = (user_addr_t)mp0[i];
}
FREE(mp0, M_MACTEMP);
}
#endif
fst.sfsp = sfsp;
fst.mp = mp;
fst.flags = uap->flags;
fst.count = 0;
fst.error = 0;
fst.maxcount = maxcount;
vfs_iterate(0, getfsstat_callback, &fst);
if (mp)
FREE(mp, M_MACTEMP);
if (fst.error ) {
KAUTH_DEBUG("ERROR - %s gets %d", p->p_comm, fst.error);
return(fst.error);
}
if (fst.sfsp && fst.count > fst.maxcount)
*retval = fst.maxcount;
else
*retval = fst.count;
return (0);
}
static int
getfsstat64_callback(mount_t mp, void * arg)
{
struct getfsstat_struct *fstp = (struct getfsstat_struct *)arg;
struct vfsstatfs *sp;
int error;
if (fstp->sfsp && fstp->count < fstp->maxcount) {
sp = &mp->mnt_vfsstat;
if (((fstp->flags & MNT_NOWAIT) == 0 ||
(fstp->flags & (MNT_WAIT | MNT_DWAIT))) &&
(error = vfs_update_vfsstat(mp, vfs_context_current(), VFS_USER_EVENT))) {
KAUTH_DEBUG("vfs_update_vfsstat returned %d", error);
return(VFS_RETURNED);
}
error = statfs64_common(mp, sp, fstp->sfsp);
if (error) {
fstp->error = error;
return(VFS_RETURNED_DONE);
}
fstp->sfsp += sizeof(struct statfs64);
}
fstp->count++;
return(VFS_RETURNED);
}
int
getfsstat64(__unused proc_t p, struct getfsstat64_args *uap, int *retval)
{
user_addr_t sfsp;
int count, maxcount;
struct getfsstat_struct fst;
maxcount = uap->bufsize / sizeof(struct statfs64);
sfsp = uap->buf;
count = 0;
fst.sfsp = sfsp;
fst.flags = uap->flags;
fst.count = 0;
fst.error = 0;
fst.maxcount = maxcount;
vfs_iterate(0, getfsstat64_callback, &fst);
if (fst.error ) {
KAUTH_DEBUG("ERROR - %s gets %d", p->p_comm, fst.error);
return(fst.error);
}
if (fst.sfsp && fst.count > fst.maxcount)
*retval = fst.maxcount;
else
*retval = fst.count;
return (0);
}
static int
common_fchdir(proc_t p, struct fchdir_args *uap, int per_thread)
{
struct filedesc *fdp = p->p_fd;
vnode_t vp;
vnode_t tdp;
vnode_t tvp;
struct mount *mp;
int error;
vfs_context_t ctx = vfs_context_current();
AUDIT_ARG(fd, uap->fd);
if (per_thread && uap->fd == -1) {
thread_t th = vfs_context_thread(ctx);
if (th) {
uthread_t uth = get_bsdthread_info(th);
tvp = uth->uu_cdir;
uth->uu_cdir = NULLVP;
if (tvp != NULLVP) {
vnode_rele(tvp);
return (0);
}
}
return (EBADF);
}
if ( (error = file_vnode(uap->fd, &vp)) )
return(error);
if ( (error = vnode_getwithref(vp)) ) {
file_drop(uap->fd);
return(error);
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
if (vp->v_type != VDIR) {
error = ENOTDIR;
goto out;
}
#if CONFIG_MACF
error = mac_vnode_check_chdir(ctx, vp);
if (error)
goto out;
#endif
error = vnode_authorize(vp, NULL, KAUTH_VNODE_SEARCH, ctx);
if (error)
goto out;
while (!error && (mp = vp->v_mountedhere) != NULL) {
if (vfs_busy(mp, LK_NOWAIT)) {
error = EACCES;
goto out;
}
error = VFS_ROOT(mp, &tdp, ctx);
vfs_unbusy(mp);
if (error)
break;
vnode_put(vp);
vp = tdp;
}
if (error)
goto out;
if ( (error = vnode_ref(vp)) )
goto out;
vnode_put(vp);
if (per_thread) {
thread_t th = vfs_context_thread(ctx);
if (th) {
uthread_t uth = get_bsdthread_info(th);
tvp = uth->uu_cdir;
uth->uu_cdir = vp;
OSBitOrAtomic(P_THCWD, &p->p_flag);
} else {
vnode_rele(vp);
return (ENOENT);
}
} else {
proc_fdlock(p);
tvp = fdp->fd_cdir;
fdp->fd_cdir = vp;
proc_fdunlock(p);
}
if (tvp)
vnode_rele(tvp);
file_drop(uap->fd);
return (0);
out:
vnode_put(vp);
file_drop(uap->fd);
return(error);
}
int
fchdir(proc_t p, struct fchdir_args *uap, __unused int32_t *retval)
{
return common_fchdir(p, uap, 0);
}
int
__pthread_fchdir(proc_t p, struct __pthread_fchdir_args *uap, __unused int32_t *retval)
{
return common_fchdir(p, (void *)uap, 1);
}
static int
common_chdir(proc_t p, struct chdir_args *uap, int per_thread)
{
struct filedesc *fdp = p->p_fd;
int error;
struct nameidata nd;
vnode_t tvp;
vfs_context_t ctx = vfs_context_current();
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = change_dir(&nd, ctx);
if (error)
return (error);
if ( (error = vnode_ref(nd.ni_vp)) ) {
vnode_put(nd.ni_vp);
return (error);
}
vnode_put(nd.ni_vp);
if (per_thread) {
thread_t th = vfs_context_thread(ctx);
if (th) {
uthread_t uth = get_bsdthread_info(th);
tvp = uth->uu_cdir;
uth->uu_cdir = nd.ni_vp;
OSBitOrAtomic(P_THCWD, &p->p_flag);
} else {
vnode_rele(nd.ni_vp);
return (ENOENT);
}
} else {
proc_fdlock(p);
tvp = fdp->fd_cdir;
fdp->fd_cdir = nd.ni_vp;
proc_fdunlock(p);
}
if (tvp)
vnode_rele(tvp);
return (0);
}
int
chdir(proc_t p, struct chdir_args *uap, __unused int32_t *retval)
{
return common_chdir(p, (void *)uap, 0);
}
int
__pthread_chdir(proc_t p, struct __pthread_chdir_args *uap, __unused int32_t *retval)
{
return common_chdir(p, (void *)uap, 1);
}
int
chroot(proc_t p, struct chroot_args *uap, __unused int32_t *retval)
{
struct filedesc *fdp = p->p_fd;
int error;
struct nameidata nd;
vnode_t tvp;
vfs_context_t ctx = vfs_context_current();
if ((error = suser(kauth_cred_get(), &p->p_acflag)))
return (error);
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = change_dir(&nd, ctx);
if (error)
return (error);
#if CONFIG_MACF
error = mac_vnode_check_chroot(ctx, nd.ni_vp,
&nd.ni_cnd);
if (error) {
vnode_put(nd.ni_vp);
return (error);
}
#endif
if ( (error = vnode_ref(nd.ni_vp)) ) {
vnode_put(nd.ni_vp);
return (error);
}
vnode_put(nd.ni_vp);
proc_fdlock(p);
tvp = fdp->fd_rdir;
fdp->fd_rdir = nd.ni_vp;
fdp->fd_flags |= FD_CHROOT;
proc_fdunlock(p);
if (tvp != NULL)
vnode_rele(tvp);
return (0);
}
static int
change_dir(struct nameidata *ndp, vfs_context_t ctx)
{
vnode_t vp;
int error;
if ((error = namei(ndp)))
return (error);
nameidone(ndp);
vp = ndp->ni_vp;
if (vp->v_type != VDIR) {
vnode_put(vp);
return (ENOTDIR);
}
#if CONFIG_MACF
error = mac_vnode_check_chdir(ctx, vp);
if (error) {
vnode_put(vp);
return (error);
}
#endif
error = vnode_authorize(vp, NULL, KAUTH_VNODE_SEARCH, ctx);
if (error) {
vnode_put(vp);
return (error);
}
return (error);
}
int
open1(vfs_context_t ctx, struct nameidata *ndp, int uflags, struct vnode_attr *vap, int32_t *retval)
{
proc_t p = vfs_context_proc(ctx);
uthread_t uu = get_bsdthread_info(vfs_context_thread(ctx));
struct filedesc *fdp = p->p_fd;
struct fileproc *fp;
vnode_t vp;
int flags, oflags;
struct fileproc *nfp;
int type, indx, error;
struct flock lf;
int no_controlling_tty = 0;
int deny_controlling_tty = 0;
struct session *sessp = SESSION_NULL;
struct vfs_context context = *vfs_context_current();
oflags = uflags;
if ((oflags & O_ACCMODE) == O_ACCMODE)
return(EINVAL);
flags = FFLAGS(uflags);
AUDIT_ARG(fflags, oflags);
AUDIT_ARG(mode, vap->va_mode);
if ( (error = falloc(p, &nfp, &indx, ctx)) ) {
return (error);
}
fp = nfp;
uu->uu_dupfd = -indx - 1;
if (!(p->p_flag & P_CONTROLT)) {
sessp = proc_session(p);
no_controlling_tty = 1;
if (SESS_LEADER(p, sessp) &&
sessp->s_ttyvp == NULL &&
(flags & O_NOCTTY)) {
session_lock(sessp);
sessp->s_flags |= S_NOCTTY;
session_unlock(sessp);
deny_controlling_tty = 1;
}
}
if ((error = vn_open_auth(ndp, &flags, vap))) {
if ((error == ENODEV || error == ENXIO) && (uu->uu_dupfd >= 0)){
if ((error = dupfdopen(fdp, indx, uu->uu_dupfd, flags, error)) == 0) {
fp_drop(p, indx, NULL, 0);
*retval = indx;
if (deny_controlling_tty) {
session_lock(sessp);
sessp->s_flags &= ~S_NOCTTY;
session_unlock(sessp);
}
if (sessp != SESSION_NULL)
session_rele(sessp);
return (0);
}
}
if (error == ERESTART)
error = EINTR;
fp_free(p, indx, fp);
if (deny_controlling_tty) {
session_lock(sessp);
sessp->s_flags &= ~S_NOCTTY;
session_unlock(sessp);
}
if (sessp != SESSION_NULL)
session_rele(sessp);
return (error);
}
uu->uu_dupfd = 0;
vp = ndp->ni_vp;
fp->f_fglob->fg_flag = flags & (FMASK | O_EVTONLY);
fp->f_fglob->fg_type = DTYPE_VNODE;
fp->f_fglob->fg_ops = &vnops;
fp->f_fglob->fg_data = (caddr_t)vp;
if (flags & (O_EXLOCK | O_SHLOCK)) {
lf.l_whence = SEEK_SET;
lf.l_start = 0;
lf.l_len = 0;
if (flags & O_EXLOCK)
lf.l_type = F_WRLCK;
else
lf.l_type = F_RDLCK;
type = F_FLOCK;
if ((flags & FNONBLOCK) == 0)
type |= F_WAIT;
#if CONFIG_MACF
error = mac_file_check_lock(vfs_context_ucred(ctx), fp->f_fglob,
F_SETLK, &lf);
if (error)
goto bad;
#endif
if ((error = VNOP_ADVLOCK(vp, (caddr_t)fp->f_fglob, F_SETLK, &lf, type, ctx)))
goto bad;
fp->f_fglob->fg_flag |= FHASLOCK;
}
if ((flags & O_TRUNC) && ((error = vnode_setsize(vp, (off_t)0, 0, ctx)) != 0))
goto bad;
if (deny_controlling_tty) {
session_lock(sessp);
sessp->s_flags &= ~S_NOCTTY;
session_unlock(sessp);
}
if (no_controlling_tty && (p->p_flag & P_CONTROLT)) {
vnode_t ttyvp;
vnode_ref(vp);
session_lock(sessp);
ttyvp = sessp->s_ttyvp;
sessp->s_ttyvp = vp;
sessp->s_ttyvid = vnode_vid(vp);
session_unlock(sessp);
if (ttyvp != NULLVP)
vnode_rele(ttyvp);
}
vnode_put(vp);
proc_fdlock(p);
procfdtbl_releasefd(p, indx, NULL);
fp_drop(p, indx, fp, 1);
proc_fdunlock(p);
*retval = indx;
if (sessp != SESSION_NULL)
session_rele(sessp);
return (0);
bad:
if (deny_controlling_tty) {
session_lock(sessp);
sessp->s_flags &= ~S_NOCTTY;
session_unlock(sessp);
}
if (sessp != SESSION_NULL)
session_rele(sessp);
context.vc_ucred = fp->f_fglob->fg_cred;
vn_close(vp, fp->f_fglob->fg_flag, &context);
vnode_put(vp);
fp_free(p, indx, fp);
return (error);
}
int
open_extended(proc_t p, struct open_extended_args *uap, int32_t *retval)
{
struct filedesc *fdp = p->p_fd;
int ciferror;
kauth_filesec_t xsecdst;
struct vnode_attr va;
struct nameidata nd;
int cmode;
AUDIT_ARG(owner, uap->uid, uap->gid);
xsecdst = NULL;
if ((uap->xsecurity != USER_ADDR_NULL) &&
((ciferror = kauth_copyinfilesec(uap->xsecurity, &xsecdst)) != 0))
return ciferror;
VATTR_INIT(&va);
cmode = ((uap->mode &~ fdp->fd_cmask) & ALLPERMS) & ~S_ISTXT;
VATTR_SET(&va, va_mode, cmode);
if (uap->uid != KAUTH_UID_NONE)
VATTR_SET(&va, va_uid, uap->uid);
if (uap->gid != KAUTH_GID_NONE)
VATTR_SET(&va, va_gid, uap->gid);
if (xsecdst != NULL)
VATTR_SET(&va, va_acl, &xsecdst->fsec_acl);
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1, UIO_USERSPACE, uap->path, vfs_context_current());
ciferror = open1(vfs_context_current(), &nd, uap->flags, &va, retval);
if (xsecdst != NULL)
kauth_filesec_free(xsecdst);
return ciferror;
}
int
open(proc_t p, struct open_args *uap, int32_t *retval)
{
__pthread_testcancel(1);
return(open_nocancel(p, (struct open_nocancel_args *)uap, retval));
}
int
open_nocancel(proc_t p, struct open_nocancel_args *uap, int32_t *retval)
{
struct filedesc *fdp = p->p_fd;
struct vnode_attr va;
struct nameidata nd;
int cmode;
VATTR_INIT(&va);
cmode = ((uap->mode &~ fdp->fd_cmask) & ALLPERMS) & ~S_ISTXT;
VATTR_SET(&va, va_mode, cmode & ACCESSPERMS);
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1, UIO_USERSPACE, uap->path, vfs_context_current());
return(open1(vfs_context_current(), &nd, uap->flags, &va, retval));
}
static int mkfifo1(vfs_context_t ctx, user_addr_t upath, struct vnode_attr *vap);
int
mknod(proc_t p, struct mknod_args *uap, __unused int32_t *retval)
{
struct vnode_attr va;
vfs_context_t ctx = vfs_context_current();
int error;
int whiteout = 0;
struct nameidata nd;
vnode_t vp, dvp;
VATTR_INIT(&va);
VATTR_SET(&va, va_mode, (uap->mode & ALLPERMS) & ~p->p_fd->fd_cmask);
VATTR_SET(&va, va_rdev, uap->dev);
if ((uap->mode & S_IFMT) == S_IFIFO)
return(mkfifo1(ctx, uap->path, &va));
AUDIT_ARG(mode, uap->mode);
AUDIT_ARG(value32, uap->dev);
if ((error = suser(vfs_context_ucred(ctx), &p->p_acflag)))
return (error);
NDINIT(&nd, CREATE, LOCKPARENT | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
dvp = nd.ni_dvp;
vp = nd.ni_vp;
if (vp != NULL) {
error = EEXIST;
goto out;
}
switch (uap->mode & S_IFMT) {
case S_IFMT:
VATTR_SET(&va, va_type, VBAD);
break;
case S_IFCHR:
VATTR_SET(&va, va_type, VCHR);
break;
case S_IFBLK:
VATTR_SET(&va, va_type, VBLK);
break;
case S_IFWHT:
whiteout = 1;
break;
default:
error = EINVAL;
goto out;
}
#if CONFIG_MACF
if (!whiteout) {
error = mac_vnode_check_create(ctx,
nd.ni_dvp, &nd.ni_cnd, &va);
if (error)
goto out;
}
#endif
if ((error = vnode_authorize(dvp, NULL, KAUTH_VNODE_ADD_FILE, ctx)) != 0)
goto out;
if (whiteout) {
error = VNOP_WHITEOUT(dvp, &nd.ni_cnd, CREATE, ctx);
} else {
error = vn_create(dvp, &vp, &nd.ni_cnd, &va, 0, ctx);
}
if (error)
goto out;
if (vp) {
int update_flags = 0;
if (vp->v_name == NULL)
update_flags |= VNODE_UPDATE_NAME;
if (vp->v_parent == NULLVP)
update_flags |= VNODE_UPDATE_PARENT;
if (update_flags)
vnode_update_identity(vp, dvp, nd.ni_cnd.cn_nameptr, nd.ni_cnd.cn_namelen, nd.ni_cnd.cn_hash, update_flags);
#if CONFIG_FSE
add_fsevent(FSE_CREATE_FILE, ctx,
FSE_ARG_VNODE, vp,
FSE_ARG_DONE);
#endif
}
out:
nameidone(&nd);
if (vp)
vnode_put(vp);
vnode_put(dvp);
return (error);
}
static int
mkfifo1(vfs_context_t ctx, user_addr_t upath, struct vnode_attr *vap)
{
vnode_t vp, dvp;
int error;
struct nameidata nd;
NDINIT(&nd, CREATE, LOCKPARENT | AUDITVNPATH1,
UIO_USERSPACE, upath, ctx);
error = namei(&nd);
if (error)
return (error);
dvp = nd.ni_dvp;
vp = nd.ni_vp;
if (vp != NULL) {
error = EEXIST;
goto out;
}
VATTR_SET(vap, va_type, VFIFO);
#if CONFIG_MACF
error = mac_vnode_check_create(ctx, nd.ni_dvp,
&nd.ni_cnd, vap);
if (error)
goto out;
#endif
if ((error = vnode_authorize(dvp, NULL, KAUTH_VNODE_ADD_FILE, ctx)) != 0)
goto out;
error = vn_create(dvp, &vp, &nd.ni_cnd, vap, 0, ctx);
out:
nameidone(&nd);
if (vp)
vnode_put(vp);
vnode_put(dvp);
return error;
}
int
mkfifo_extended(proc_t p, struct mkfifo_extended_args *uap, __unused int32_t *retval)
{
int ciferror;
kauth_filesec_t xsecdst;
struct vnode_attr va;
AUDIT_ARG(owner, uap->uid, uap->gid);
xsecdst = KAUTH_FILESEC_NONE;
if (uap->xsecurity != USER_ADDR_NULL) {
if ((ciferror = kauth_copyinfilesec(uap->xsecurity, &xsecdst)) != 0)
return ciferror;
}
VATTR_INIT(&va);
VATTR_SET(&va, va_mode, (uap->mode & ALLPERMS) & ~p->p_fd->fd_cmask);
if (uap->uid != KAUTH_UID_NONE)
VATTR_SET(&va, va_uid, uap->uid);
if (uap->gid != KAUTH_GID_NONE)
VATTR_SET(&va, va_gid, uap->gid);
if (xsecdst != KAUTH_FILESEC_NONE)
VATTR_SET(&va, va_acl, &xsecdst->fsec_acl);
ciferror = mkfifo1(vfs_context_current(), uap->path, &va);
if (xsecdst != KAUTH_FILESEC_NONE)
kauth_filesec_free(xsecdst);
return ciferror;
}
int
mkfifo(proc_t p, struct mkfifo_args *uap, __unused int32_t *retval)
{
struct vnode_attr va;
VATTR_INIT(&va);
VATTR_SET(&va, va_mode, (uap->mode & ALLPERMS) & ~p->p_fd->fd_cmask);
return(mkfifo1(vfs_context_current(), uap->path, &va));
}
static char *
my_strrchr(char *p, int ch)
{
char *save;
for (save = NULL;; ++p) {
if (*p == ch)
save = p;
if (!*p)
return(save);
}
}
extern int safe_getpath(struct vnode *dvp, char *leafname, char *path, int _len, int *truncated_path);
int
safe_getpath(struct vnode *dvp, char *leafname, char *path, int _len, int *truncated_path)
{
int ret, len = _len;
*truncated_path = 0;
ret = vn_getpath(dvp, path, &len);
if (ret == 0 && len < (MAXPATHLEN - 1)) {
if (leafname) {
path[len-1] = '/';
len += strlcpy(&path[len], leafname, MAXPATHLEN-len) + 1;
if (len > MAXPATHLEN) {
char *ptr;
*truncated_path = 1;
ptr = my_strrchr(path, '/');
if (ptr) {
*ptr = '\0'; }
len = strlen(path) + 1;
}
}
} else if (ret == 0) {
*truncated_path = 1;
} else if (ret != 0) {
struct vnode *mydvp=dvp;
if (ret != ENOSPC) {
printf("safe_getpath: failed to get the path for vp %p (%s) : err %d\n",
dvp, dvp->v_name ? dvp->v_name : "no-name", ret);
}
*truncated_path = 1;
do {
if (mydvp->v_parent != NULL) {
mydvp = mydvp->v_parent;
} else if (mydvp->v_mount) {
strlcpy(path, mydvp->v_mount->mnt_vfsstat.f_mntonname, _len);
break;
} else {
strlcpy(path, "/", _len);
len = 2;
mydvp = NULL;
}
if (mydvp == NULL) {
break;
}
len = _len;
ret = vn_getpath(mydvp, path, &len);
} while (ret == ENOSPC);
}
return len;
}
int
link(__unused proc_t p, struct link_args *uap, __unused int32_t *retval)
{
vnode_t vp, dvp, lvp;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
int error;
#if CONFIG_FSE
fse_info finfo;
#endif
int need_event, has_listeners;
char *target_path = NULL;
int truncated=0;
vp = dvp = lvp = NULLVP;
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
nameidone(&nd);
if (vp->v_type == VDIR) {
if (!(vp->v_mount->mnt_vtable->vfc_vfsflags & VFC_VFSDIRLINKS)) {
error = EPERM;
goto out;
}
if (!kauth_cred_issuser(vfs_context_ucred(ctx))) {
struct vnode_attr dva;
VATTR_INIT(&dva);
VATTR_WANTED(&dva, va_uid);
if (vnode_getattr(vp, &dva, ctx) != 0 ||
!VATTR_IS_SUPPORTED(&dva, va_uid) ||
(dva.va_uid != kauth_cred_getuid(vfs_context_ucred(ctx)))) {
error = EACCES;
goto out;
}
}
}
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT | AUDITVNPATH2 | CN_NBMOUNTLOOK;
nd.ni_dirp = uap->link;
error = namei(&nd);
if (error != 0)
goto out;
dvp = nd.ni_dvp;
lvp = nd.ni_vp;
#if CONFIG_MACF
if ((error = mac_vnode_check_link(ctx, dvp, vp, &nd.ni_cnd)) != 0)
goto out2;
#endif
if ((error = vnode_authorize(vp, NULL, KAUTH_VNODE_LINKTARGET, ctx)) != 0)
goto out2;
if (lvp != NULLVP) {
error = EEXIST;
goto out2;
}
if (vnode_mount(vp) != vnode_mount(dvp)) {
error = EXDEV;
goto out2;
}
if ((error = vnode_authorize(dvp, NULL, KAUTH_VNODE_ADD_FILE, ctx)) != 0)
goto out2;
error = VNOP_LINK(vp, dvp, &nd.ni_cnd, ctx);
if (error)
goto out2;
#if CONFIG_FSE
need_event = need_fsevent(FSE_CREATE_FILE, dvp);
#else
need_event = 0;
#endif
has_listeners = kauth_authorize_fileop_has_listeners();
if (need_event || has_listeners) {
char *link_to_path = NULL;
int len, link_name_len;
GET_PATH(target_path);
if (target_path == NULL) {
error = ENOMEM;
goto out2;
}
len = safe_getpath(dvp, nd.ni_cnd.cn_nameptr, target_path, MAXPATHLEN, &truncated);
if (has_listeners) {
GET_PATH(link_to_path);
if (link_to_path == NULL) {
error = ENOMEM;
goto out2;
}
link_name_len = MAXPATHLEN;
vn_getpath(vp, link_to_path, &link_name_len);
kauth_authorize_fileop(vfs_context_ucred(ctx), KAUTH_FILEOP_LINK,
(uintptr_t)link_to_path, (uintptr_t)target_path);
if (link_to_path != NULL) {
RELEASE_PATH(link_to_path);
}
}
#if CONFIG_FSE
if (need_event) {
if (get_fse_info(vp, &finfo, ctx) == 0) {
if (truncated) {
finfo.mode |= FSE_TRUNCATED_PATH;
}
add_fsevent(FSE_CREATE_FILE, ctx,
FSE_ARG_STRING, len, target_path,
FSE_ARG_FINFO, &finfo,
FSE_ARG_DONE);
}
if (vp->v_parent) {
add_fsevent(FSE_STAT_CHANGED, ctx,
FSE_ARG_VNODE, vp->v_parent,
FSE_ARG_DONE);
}
}
#endif
}
out2:
nameidone(&nd);
if (target_path != NULL) {
RELEASE_PATH(target_path);
}
out:
if (lvp)
vnode_put(lvp);
if (dvp)
vnode_put(dvp);
vnode_put(vp);
return (error);
}
int
symlink(proc_t p, struct symlink_args *uap, __unused int32_t *retval)
{
struct vnode_attr va;
char *path;
int error;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
vnode_t vp, dvp;
size_t dummy=0;
MALLOC_ZONE(path, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
error = copyinstr(uap->path, path, MAXPATHLEN, &dummy);
if (error)
goto out;
AUDIT_ARG(text, path);
NDINIT(&nd, CREATE, LOCKPARENT | AUDITVNPATH1,
UIO_USERSPACE, uap->link, ctx);
error = namei(&nd);
if (error)
goto out;
dvp = nd.ni_dvp;
vp = nd.ni_vp;
VATTR_INIT(&va);
VATTR_SET(&va, va_type, VLNK);
VATTR_SET(&va, va_mode, ACCESSPERMS & ~p->p_fd->fd_cmask);
#if CONFIG_MACF
error = mac_vnode_check_create(ctx,
dvp, &nd.ni_cnd, &va);
#endif
if (error != 0) {
goto skipit;
}
if (vp != NULL) {
error = EEXIST;
goto skipit;
}
if (error == 0)
error = vnode_authorize(dvp, NULL, KAUTH_VNODE_ADD_FILE, ctx);
if (error == 0)
error = vnode_authattr_new(dvp, &va, 0, ctx);
if (error == 0)
error = VNOP_SYMLINK(dvp, &vp, &nd.ni_cnd, &va, path, ctx);
if (error == 0)
error = vnode_setattr_fallback(vp, &va, ctx);
if (error == 0) {
int update_flags = 0;
if (vp == NULL) {
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags = 0;
error = namei(&nd);
vp = nd.ni_vp;
if (vp == NULL)
goto skipit;
}
#if 0
if (kauth_authorize_fileop_has_listeners() &&
namei(&nd) == 0) {
char *new_link_path = NULL;
int len;
new_link_path = get_pathbuff();
len = MAXPATHLEN;
vn_getpath(dvp, new_link_path, &len);
if ((len + 1 + nd.ni_cnd.cn_namelen + 1) < MAXPATHLEN) {
new_link_path[len - 1] = '/';
strlcpy(&new_link_path[len], nd.ni_cnd.cn_nameptr, MAXPATHLEN-len);
}
kauth_authorize_fileop(vfs_context_ucred(ctx), KAUTH_FILEOP_SYMLINK,
(uintptr_t)path, (uintptr_t)new_link_path);
if (new_link_path != NULL)
release_pathbuff(new_link_path);
}
#endif
if (vp->v_name == NULL)
update_flags |= VNODE_UPDATE_NAME;
if (vp->v_parent == NULLVP)
update_flags |= VNODE_UPDATE_PARENT;
if (update_flags)
vnode_update_identity(vp, dvp, nd.ni_cnd.cn_nameptr, nd.ni_cnd.cn_namelen, nd.ni_cnd.cn_hash, update_flags);
#if CONFIG_FSE
add_fsevent(FSE_CREATE_FILE, ctx,
FSE_ARG_VNODE, vp,
FSE_ARG_DONE);
#endif
}
skipit:
nameidone(&nd);
if (vp)
vnode_put(vp);
vnode_put(dvp);
out:
FREE_ZONE(path, MAXPATHLEN, M_NAMEI);
return (error);
}
int
undelete(__unused proc_t p, struct undelete_args *uap, __unused int32_t *retval)
{
int error;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
vnode_t vp, dvp;
NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT|AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
dvp = nd.ni_dvp;
vp = nd.ni_vp;
if (vp == NULLVP && (nd.ni_cnd.cn_flags & ISWHITEOUT)) {
error = VNOP_WHITEOUT(dvp, &nd.ni_cnd, DELETE, ctx);
} else
error = EEXIST;
nameidone(&nd);
if (vp)
vnode_put(vp);
vnode_put(dvp);
return (error);
}
int
unlink1(vfs_context_t ctx, struct nameidata *ndp, int nodelbusy)
{
vnode_t vp, dvp;
int error;
struct componentname *cnp;
char *path = NULL;
int len=0;
#if CONFIG_FSE
fse_info finfo;
#endif
int flags = 0;
int need_event = 0;
int has_listeners = 0;
int truncated_path=0;
#if NAMEDRSRCFORK
ndp->ni_cnd.cn_flags |= CN_ALLOWRSRCFORK;
#endif
ndp->ni_cnd.cn_flags |= LOCKPARENT;
cnp = &ndp->ni_cnd;
error = namei(ndp);
if (error)
return (error);
dvp = ndp->ni_dvp;
vp = ndp->ni_vp;
if (nodelbusy) {
flags |= VNODE_REMOVE_NODELETEBUSY;
}
if ((vp->v_type == VDIR) &&
!(vp->v_mount->mnt_vtable->vfc_vfsflags & VFC_VFSDIRLINKS)) {
error = EPERM;
}
if (vp->v_flag & VROOT) {
error = EBUSY;
}
if (error)
goto out;
#if CONFIG_MACF
if (!error)
error = mac_vnode_check_unlink(ctx,
dvp, vp, cnp);
#endif
if (!error)
error = vnode_authorize(vp, ndp->ni_dvp, KAUTH_VNODE_DELETE, ctx);
if (error)
goto out;
#if CONFIG_FSE
need_event = need_fsevent(FSE_DELETE, dvp);
if (need_event) {
if ((vp->v_flag & VISHARDLINK) == 0) {
get_fse_info(vp, &finfo, ctx);
}
}
#endif
has_listeners = kauth_authorize_fileop_has_listeners();
if (need_event || has_listeners) {
GET_PATH(path);
if (path == NULL) {
error = ENOMEM;
goto out;
}
len = safe_getpath(dvp, ndp->ni_cnd.cn_nameptr, path, MAXPATHLEN, &truncated_path);
}
#if NAMEDRSRCFORK
if (ndp->ni_cnd.cn_flags & CN_WANTSRSRCFORK)
error = vnode_removenamedstream(dvp, vp, XATTR_RESOURCEFORK_NAME, 0, ctx);
else
#endif
error = VNOP_REMOVE(dvp, vp, &ndp->ni_cnd, flags, ctx);
if (!error) {
if (has_listeners) {
kauth_authorize_fileop(vfs_context_ucred(ctx),
KAUTH_FILEOP_DELETE,
(uintptr_t)vp,
(uintptr_t)path);
}
if (vp->v_flag & VISHARDLINK) {
vnode_update_identity(vp, NULL, NULL, 0, 0, VNODE_UPDATE_PARENT);
}
#if CONFIG_FSE
if (need_event) {
if (vp->v_flag & VISHARDLINK) {
get_fse_info(vp, &finfo, ctx);
}
if (truncated_path) {
finfo.mode |= FSE_TRUNCATED_PATH;
}
add_fsevent(FSE_DELETE, ctx,
FSE_ARG_STRING, len, path,
FSE_ARG_FINFO, &finfo,
FSE_ARG_DONE);
}
#endif
}
if (path != NULL)
RELEASE_PATH(path);
out:
#if NAMEDRSRCFORK
if ((vnode_isnamedstream(ndp->ni_vp)) &&
(ndp->ni_vp->v_parent != NULLVP) &&
vnode_isshadow(ndp->ni_vp)) {
vnode_recycle(ndp->ni_vp);
}
#endif
nameidone(ndp);
vnode_put(dvp);
vnode_put(vp);
return (error);
}
int
unlink(__unused proc_t p, struct unlink_args *uap, __unused int32_t *retval)
{
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
NDINIT(&nd, DELETE, AUDITVNPATH1, UIO_USERSPACE, uap->path, ctx);
return unlink1(ctx, &nd, 0);
}
int
delete(__unused proc_t p, struct delete_args *uap, __unused int32_t *retval)
{
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
NDINIT(&nd, DELETE, AUDITVNPATH1, UIO_USERSPACE, uap->path, ctx);
return unlink1(ctx, &nd, 1);
}
int
lseek(proc_t p, struct lseek_args *uap, off_t *retval)
{
struct fileproc *fp;
vnode_t vp;
struct vfs_context *ctx;
off_t offset = uap->offset, file_size;
int error;
if ( (error = fp_getfvp(p,uap->fd, &fp, &vp)) ) {
if (error == ENOTSUP)
return (ESPIPE);
return (error);
}
if (vnode_isfifo(vp)) {
file_drop(uap->fd);
return(ESPIPE);
}
ctx = vfs_context_current();
#if CONFIG_MACF
if (uap->whence == L_INCR && uap->offset == 0)
error = mac_file_check_get_offset(vfs_context_ucred(ctx),
fp->f_fglob);
else
error = mac_file_check_change_offset(vfs_context_ucred(ctx),
fp->f_fglob);
if (error) {
file_drop(uap->fd);
return (error);
}
#endif
if ( (error = vnode_getwithref(vp)) ) {
file_drop(uap->fd);
return(error);
}
switch (uap->whence) {
case L_INCR:
offset += fp->f_fglob->fg_offset;
break;
case L_XTND:
if ((error = vnode_size(vp, &file_size, ctx)) != 0)
break;
offset += file_size;
break;
case L_SET:
break;
default:
error = EINVAL;
}
if (error == 0) {
if (uap->offset > 0 && offset < 0) {
error = EOVERFLOW;
} else {
if (offset < 0 && vp->v_type != VCHR) {
error = EINVAL;
} else {
fp->f_fglob->fg_offset = offset;
*retval = fp->f_fglob->fg_offset;
}
}
}
post_event_if_success(vp, error, NOTE_NONE);
(void)vnode_put(vp);
file_drop(uap->fd);
return (error);
}
static int
access1(vnode_t vp, vnode_t dvp, int uflags, vfs_context_t ctx)
{
kauth_action_t action;
int error;
if (!(uflags & _ACCESS_EXTENDED_MASK)) {
action = 0;
if (uflags & R_OK)
action |= KAUTH_VNODE_READ_DATA;
if (uflags & W_OK) {
if (vnode_isdir(vp)) {
action |= KAUTH_VNODE_ADD_FILE |
KAUTH_VNODE_ADD_SUBDIRECTORY;
} else {
action |= KAUTH_VNODE_WRITE_DATA;
}
}
if (uflags & X_OK) {
if (vnode_isdir(vp)) {
action |= KAUTH_VNODE_SEARCH;
} else {
action |= KAUTH_VNODE_EXECUTE;
}
}
} else {
action = uflags >> 8;
}
#if CONFIG_MACF
error = mac_vnode_check_access(ctx, vp, uflags);
if (error)
return (error);
#endif
if (action != 0) {
error = vnode_authorize(vp, dvp, action | KAUTH_VNODE_ACCESS, ctx);
} else {
error = 0;
}
return(error);
}
int
access_extended(__unused proc_t p, struct access_extended_args *uap, __unused int32_t *retval)
{
struct accessx_descriptor *input = NULL;
errno_t *result = NULL;
errno_t error = 0;
int wantdelete = 0;
unsigned int desc_max, desc_actual, i, j;
struct vfs_context context;
struct nameidata nd;
int niopts;
vnode_t vp = NULL;
vnode_t dvp = NULL;
#define ACCESSX_MAX_DESCR_ON_STACK 10
struct accessx_descriptor stack_input[ACCESSX_MAX_DESCR_ON_STACK];
context.vc_ucred = NULL;
if (uap->size > ACCESSX_MAX_TABLESIZE)
return(ENOMEM);
if (uap->size < (sizeof(struct accessx_descriptor) + 2))
return(EINVAL);
if (uap->size <= sizeof (stack_input)) {
input = stack_input;
} else {
MALLOC(input, struct accessx_descriptor *, uap->size, M_TEMP, M_WAITOK);
if (input == NULL) {
error = ENOMEM;
goto out;
}
}
error = copyin(uap->entries, input, uap->size);
if (error)
goto out;
AUDIT_ARG(opaque, input, uap->size);
((char *)input)[uap->size - 1] = 0;
context.vc_ucred = kauth_cred_copy_real(kauth_cred_get());
context.vc_thread = current_thread();
desc_max = (uap->size - 2) / sizeof(struct accessx_descriptor);
desc_actual = desc_max;
for (i = 0; i < desc_actual; i++) {
j = input[i].ad_name_offset / sizeof(struct accessx_descriptor);
if (j > desc_max || (j != 0 && j <= i)) {
error = EINVAL;
goto out;
}
if (j == 0) {
if (i == 0) {
error = EINVAL;
goto out;
}
continue;
}
if (j < desc_actual)
desc_actual = j;
}
if (desc_actual > ACCESSX_MAX_DESCRIPTORS) {
error = ENOMEM;
goto out;
}
MALLOC(result, errno_t *, desc_actual * sizeof(errno_t), M_TEMP, M_WAITOK);
if (result == NULL) {
error = ENOMEM;
goto out;
}
error = 0;
for (i = 0; i < desc_actual; i++) {
if (input[i].ad_name_offset != 0) {
if (vp) {
vnode_put(vp);
vp = NULL;
}
if (dvp) {
vnode_put(dvp);
dvp = NULL;
}
wantdelete = input[i].ad_flags & _DELETE_OK;
for (j = i + 1; (j < desc_actual) && (input[j].ad_name_offset == 0); j++)
if (input[j].ad_flags & _DELETE_OK)
wantdelete = 1;
niopts = FOLLOW | AUDITVNPATH1;
if (wantdelete)
niopts |= WANTPARENT;
NDINIT(&nd, LOOKUP, niopts, UIO_SYSSPACE, CAST_USER_ADDR_T(((const char *)input) + input[i].ad_name_offset), &context);
error = namei(&nd);
if (!error) {
vp = nd.ni_vp;
if (wantdelete)
dvp = nd.ni_dvp;
}
nameidone(&nd);
}
switch(error) {
case ENOENT:
case EACCES:
case EPERM:
case ENOTDIR:
result[i] = error;
break;
case 0:
result[i] = access1(vp, dvp, input[i].ad_flags, &context);
break;
default:
goto out;
}
}
AUDIT_ARG(data, result, sizeof(errno_t), desc_actual);
error = copyout(result, uap->results, desc_actual * sizeof(errno_t));
out:
if (input && input != stack_input)
FREE(input, M_TEMP);
if (result)
FREE(result, M_TEMP);
if (vp)
vnode_put(vp);
if (dvp)
vnode_put(dvp);
if (IS_VALID_CRED(context.vc_ucred))
kauth_cred_unref(&context.vc_ucred);
return(error);
}
int
access(__unused proc_t p, struct access_args *uap, __unused int32_t *retval)
{
int error;
struct nameidata nd;
int niopts;
struct vfs_context context;
#if NAMEDRSRCFORK
int is_namedstream = 0;
#endif
context.vc_ucred = kauth_cred_copy_real(kauth_cred_get());
context.vc_thread = current_thread();
niopts = FOLLOW | AUDITVNPATH1;
if (uap->flags & _DELETE_OK)
niopts |= WANTPARENT;
NDINIT(&nd, LOOKUP, niopts, UIO_USERSPACE, uap->path, &context);
#if NAMEDRSRCFORK
if (uap->flags == F_OK)
nd.ni_cnd.cn_flags |= CN_ALLOWRSRCFORK;
#endif
error = namei(&nd);
if (error)
goto out;
#if NAMEDRSRCFORK
if (vnode_isnamedstream(nd.ni_vp) &&
(nd.ni_vp->v_parent != NULLVP) &&
vnode_isshadow(nd.ni_vp)) {
is_namedstream = 1;
vnode_ref(nd.ni_vp);
}
#endif
error = access1(nd.ni_vp, nd.ni_dvp, uap->flags, &context);
#if NAMEDRSRCFORK
if (is_namedstream) {
vnode_rele(nd.ni_vp);
}
#endif
vnode_put(nd.ni_vp);
if (uap->flags & _DELETE_OK)
vnode_put(nd.ni_dvp);
nameidone(&nd);
out:
kauth_cred_unref(&context.vc_ucred);
return(error);
}
static int
stat2(vfs_context_t ctx, struct nameidata *ndp, user_addr_t ub, user_addr_t xsecurity, user_addr_t xsecurity_size, int isstat64)
{
union {
struct stat sb;
struct stat64 sb64;
} source;
union {
struct user64_stat user64_sb;
struct user32_stat user32_sb;
struct user64_stat64 user64_sb64;
struct user32_stat64 user32_sb64;
} dest;
caddr_t sbp;
int error, my_size;
kauth_filesec_t fsec;
size_t xsecurity_bufsize;
void * statptr;
#if NAMEDRSRCFORK
int is_namedstream = 0;
ndp->ni_cnd.cn_flags |= CN_ALLOWRSRCFORK;
#endif
error = namei(ndp);
if (error)
return (error);
fsec = KAUTH_FILESEC_NONE;
statptr = (void *)&source;
#if NAMEDRSRCFORK
if (vnode_isnamedstream(ndp->ni_vp) &&
(ndp->ni_vp->v_parent != NULLVP) &&
vnode_isshadow(ndp->ni_vp)) {
is_namedstream = 1;
vnode_ref(ndp->ni_vp);
}
#endif
error = vn_stat(ndp->ni_vp, statptr, (xsecurity != USER_ADDR_NULL ? &fsec : NULL), isstat64, ctx);
#if NAMEDRSRCFORK
if (is_namedstream) {
vnode_rele(ndp->ni_vp);
}
#endif
vnode_put(ndp->ni_vp);
nameidone(ndp);
if (error)
return (error);
if (isstat64 != 0) {
source.sb64.st_lspare = 0;
source.sb64.st_qspare[0] = 0LL;
source.sb64.st_qspare[1] = 0LL;
if (IS_64BIT_PROCESS(vfs_context_proc(ctx))) {
munge_user64_stat64(&source.sb64, &dest.user64_sb64);
my_size = sizeof(dest.user64_sb64);
sbp = (caddr_t)&dest.user64_sb64;
} else {
munge_user32_stat64(&source.sb64, &dest.user32_sb64);
my_size = sizeof(dest.user32_sb64);
sbp = (caddr_t)&dest.user32_sb64;
}
if ((source.sb64.st_nlink == 0) && S_ISREG(source.sb64.st_mode)) {
source.sb64.st_nlink = 1;
}
} else {
source.sb.st_lspare = 0;
source.sb.st_qspare[0] = 0LL;
source.sb.st_qspare[1] = 0LL;
if (IS_64BIT_PROCESS(vfs_context_proc(ctx))) {
munge_user64_stat(&source.sb, &dest.user64_sb);
my_size = sizeof(dest.user64_sb);
sbp = (caddr_t)&dest.user64_sb;
} else {
munge_user32_stat(&source.sb, &dest.user32_sb);
my_size = sizeof(dest.user32_sb);
sbp = (caddr_t)&dest.user32_sb;
}
if ((source.sb.st_nlink == 0) && S_ISREG(source.sb.st_mode)) {
source.sb.st_nlink = 1;
}
}
if ((error = copyout(sbp, ub, my_size)) != 0)
goto out;
if (xsecurity != USER_ADDR_NULL) {
if (fsec == KAUTH_FILESEC_NONE) {
if (susize(xsecurity_size, 0) != 0) {
error = EFAULT;
goto out;
}
} else {
xsecurity_bufsize = fusize(xsecurity_size);
if (susize(xsecurity_size, KAUTH_FILESEC_COPYSIZE(fsec)) != 0) {
error = EFAULT;
goto out;
}
if (xsecurity_bufsize >= KAUTH_FILESEC_COPYSIZE(fsec))
error = copyout(fsec, xsecurity, KAUTH_FILESEC_COPYSIZE(fsec));
}
}
out:
if (fsec != KAUTH_FILESEC_NONE)
kauth_filesec_free(fsec);
return (error);
}
static int
stat1(user_addr_t path, user_addr_t ub, user_addr_t xsecurity, user_addr_t xsecurity_size, int isstat64)
{
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
NDINIT(&nd, LOOKUP, NOTRIGGER | FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, path, ctx);
return(stat2(ctx, &nd, ub, xsecurity, xsecurity_size, isstat64));
}
int
stat_extended(__unused proc_t p, struct stat_extended_args *uap, __unused int32_t *retval)
{
return (stat1(uap->path, uap->ub, uap->xsecurity, uap->xsecurity_size, 0));
}
int
stat(__unused proc_t p, struct stat_args *uap, __unused int32_t *retval)
{
return(stat1(uap->path, uap->ub, 0, 0, 0));
}
int
stat64(__unused proc_t p, struct stat64_args *uap, __unused int32_t *retval)
{
return(stat1(uap->path, uap->ub, 0, 0, 1));
}
int
stat64_extended(__unused proc_t p, struct stat64_extended_args *uap, __unused int32_t *retval)
{
return (stat1(uap->path, uap->ub, uap->xsecurity, uap->xsecurity_size, 1));
}
static int
lstat1(user_addr_t path, user_addr_t ub, user_addr_t xsecurity, user_addr_t xsecurity_size, int isstat64)
{
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
NDINIT(&nd, LOOKUP, NOTRIGGER | NOFOLLOW | AUDITVNPATH1,
UIO_USERSPACE, path, ctx);
return(stat2(ctx, &nd, ub, xsecurity, xsecurity_size, isstat64));
}
int
lstat_extended(__unused proc_t p, struct lstat_extended_args *uap, __unused int32_t *retval)
{
return (lstat1(uap->path, uap->ub, uap->xsecurity, uap->xsecurity_size, 0));
}
int
lstat(__unused proc_t p, struct lstat_args *uap, __unused int32_t *retval)
{
return(lstat1(uap->path, uap->ub, 0, 0, 0));
}
int
lstat64(__unused proc_t p, struct lstat64_args *uap, __unused int32_t *retval)
{
return(lstat1(uap->path, uap->ub, 0, 0, 1));
}
int
lstat64_extended(__unused proc_t p, struct lstat64_extended_args *uap, __unused int32_t *retval)
{
return (lstat1(uap->path, uap->ub, uap->xsecurity, uap->xsecurity_size, 1));
}
int
pathconf(__unused proc_t p, struct pathconf_args *uap, int32_t *retval)
{
int error;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
error = vn_pathconf(nd.ni_vp, uap->name, retval, ctx);
vnode_put(nd.ni_vp);
nameidone(&nd);
return (error);
}
int
readlink(proc_t p, struct readlink_args *uap, int32_t *retval)
{
vnode_t vp;
uio_t auio;
int spacetype = proc_is64bit(p) ? UIO_USERSPACE64 : UIO_USERSPACE32;
int error;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
char uio_buf[ UIO_SIZEOF(1) ];
NDINIT(&nd, LOOKUP, NOFOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
nameidone(&nd);
auio = uio_createwithbuffer(1, 0, spacetype, UIO_READ,
&uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, uap->buf, uap->count);
if (vp->v_type != VLNK)
error = EINVAL;
else {
#if CONFIG_MACF
error = mac_vnode_check_readlink(ctx,
vp);
#endif
if (error == 0)
error = vnode_authorize(vp, NULL, KAUTH_VNODE_READ_DATA, ctx);
if (error == 0)
error = VNOP_READLINK(vp, auio, ctx);
}
vnode_put(vp);
*retval = uap->count - (int)uio_resid(auio);
return (error);
}
static int
chflags1(vnode_t vp, int flags, vfs_context_t ctx)
{
struct vnode_attr va;
kauth_action_t action;
int error;
VATTR_INIT(&va);
VATTR_SET(&va, va_flags, flags);
#if CONFIG_MACF
error = mac_vnode_check_setflags(ctx, vp, flags);
if (error)
goto out;
#endif
if ((error = vnode_authattr(vp, &va, &action, ctx)) != 0)
goto out;
if (action && ((error = vnode_authorize(vp, NULL, action | KAUTH_VNODE_NOIMMUTABLE, ctx)) != 0))
goto out;
error = vnode_setattr(vp, &va, ctx);
if ((error == 0) && !VATTR_IS_SUPPORTED(&va, va_flags)) {
error = ENOTSUP;
}
out:
vnode_put(vp);
return(error);
}
int
chflags(__unused proc_t p, struct chflags_args *uap, __unused int32_t *retval)
{
vnode_t vp;
vfs_context_t ctx = vfs_context_current();
int error;
struct nameidata nd;
AUDIT_ARG(fflags, uap->flags);
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
nameidone(&nd);
error = chflags1(vp, uap->flags, ctx);
return(error);
}
int
fchflags(__unused proc_t p, struct fchflags_args *uap, __unused int32_t *retval)
{
vnode_t vp;
int error;
AUDIT_ARG(fd, uap->fd);
AUDIT_ARG(fflags, uap->flags);
if ( (error = file_vnode(uap->fd, &vp)) )
return (error);
if ((error = vnode_getwithref(vp))) {
file_drop(uap->fd);
return(error);
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
error = chflags1(vp, uap->flags, vfs_context_current());
file_drop(uap->fd);
return (error);
}
static int
chmod2(vfs_context_t ctx, vnode_t vp, struct vnode_attr *vap)
{
kauth_action_t action;
int error;
AUDIT_ARG(mode, vap->va_mode);
#if NAMEDSTREAMS
if (vp->v_flag & VISNAMEDSTREAM) {
return (EPERM);
}
#endif
#if CONFIG_MACF
error = mac_vnode_check_setmode(ctx, vp, (mode_t)vap->va_mode);
if (error)
return (error);
#endif
if (((error = vnode_authattr(vp, vap, &action, ctx)) != 0) ||
((error = vnode_authorize(vp, NULL, action, ctx)) != 0)) {
if (error == EACCES)
error = EPERM;
return(error);
}
error = vnode_setattr(vp, vap, ctx);
return (error);
}
static int
chmod1(vfs_context_t ctx, user_addr_t path, struct vnode_attr *vap)
{
struct nameidata nd;
int error;
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, path, ctx);
if ((error = namei(&nd)))
return (error);
error = chmod2(ctx, nd.ni_vp, vap);
vnode_put(nd.ni_vp);
nameidone(&nd);
return(error);
}
int
chmod_extended(__unused proc_t p, struct chmod_extended_args *uap, __unused int32_t *retval)
{
int error;
struct vnode_attr va;
kauth_filesec_t xsecdst;
AUDIT_ARG(owner, uap->uid, uap->gid);
VATTR_INIT(&va);
if (uap->mode != -1)
VATTR_SET(&va, va_mode, uap->mode & ALLPERMS);
if (uap->uid != KAUTH_UID_NONE)
VATTR_SET(&va, va_uid, uap->uid);
if (uap->gid != KAUTH_GID_NONE)
VATTR_SET(&va, va_gid, uap->gid);
xsecdst = NULL;
switch(uap->xsecurity) {
case CAST_USER_ADDR_T((void *)1):
VATTR_SET(&va, va_acl, NULL);
break;
case USER_ADDR_NULL:
break;
default:
if ((error = kauth_copyinfilesec(uap->xsecurity, &xsecdst)) != 0)
return(error);
VATTR_SET(&va, va_acl, &xsecdst->fsec_acl);
KAUTH_DEBUG("CHMOD - setting ACL with %d entries", va.va_acl->acl_entrycount);
}
error = chmod1(vfs_context_current(), uap->path, &va);
if (xsecdst != NULL)
kauth_filesec_free(xsecdst);
return(error);
}
int
chmod(__unused proc_t p, struct chmod_args *uap, __unused int32_t *retval)
{
struct vnode_attr va;
VATTR_INIT(&va);
VATTR_SET(&va, va_mode, uap->mode & ALLPERMS);
return(chmod1(vfs_context_current(), uap->path, &va));
}
static int
fchmod1(__unused proc_t p, int fd, struct vnode_attr *vap)
{
vnode_t vp;
int error;
AUDIT_ARG(fd, fd);
if ((error = file_vnode(fd, &vp)) != 0)
return (error);
if ((error = vnode_getwithref(vp)) != 0) {
file_drop(fd);
return(error);
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
error = chmod2(vfs_context_current(), vp, vap);
(void)vnode_put(vp);
file_drop(fd);
return (error);
}
int
fchmod_extended(proc_t p, struct fchmod_extended_args *uap, __unused int32_t *retval)
{
int error;
struct vnode_attr va;
kauth_filesec_t xsecdst;
AUDIT_ARG(owner, uap->uid, uap->gid);
VATTR_INIT(&va);
if (uap->mode != -1)
VATTR_SET(&va, va_mode, uap->mode & ALLPERMS);
if (uap->uid != KAUTH_UID_NONE)
VATTR_SET(&va, va_uid, uap->uid);
if (uap->gid != KAUTH_GID_NONE)
VATTR_SET(&va, va_gid, uap->gid);
xsecdst = NULL;
switch(uap->xsecurity) {
case USER_ADDR_NULL:
VATTR_SET(&va, va_acl, NULL);
break;
case CAST_USER_ADDR_T(-1):
break;
default:
if ((error = kauth_copyinfilesec(uap->xsecurity, &xsecdst)) != 0)
return(error);
VATTR_SET(&va, va_acl, &xsecdst->fsec_acl);
}
error = fchmod1(p, uap->fd, &va);
switch(uap->xsecurity) {
case USER_ADDR_NULL:
case CAST_USER_ADDR_T(-1):
break;
default:
if (xsecdst != NULL)
kauth_filesec_free(xsecdst);
}
return(error);
}
int
fchmod(proc_t p, struct fchmod_args *uap, __unused int32_t *retval)
{
struct vnode_attr va;
VATTR_INIT(&va);
VATTR_SET(&va, va_mode, uap->mode & ALLPERMS);
return(fchmod1(p, uap->fd, &va));
}
static int
chown1(vfs_context_t ctx, struct chown_args *uap, __unused int32_t *retval, int follow)
{
vnode_t vp;
struct vnode_attr va;
int error;
struct nameidata nd;
kauth_action_t action;
AUDIT_ARG(owner, uap->uid, uap->gid);
NDINIT(&nd, LOOKUP, (follow ? FOLLOW : 0) | NOTRIGGER | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
nameidone(&nd);
VATTR_INIT(&va);
if (uap->uid != VNOVAL)
VATTR_SET(&va, va_uid, uap->uid);
if (uap->gid != VNOVAL)
VATTR_SET(&va, va_gid, uap->gid);
#if CONFIG_MACF
error = mac_vnode_check_setowner(ctx, vp, uap->uid, uap->gid);
if (error)
goto out;
#endif
if ((error = vnode_authattr(vp, &va, &action, ctx)) != 0)
goto out;
if (action && ((error = vnode_authorize(vp, NULL, action, ctx)) != 0))
goto out;
error = vnode_setattr(vp, &va, ctx);
out:
if (error == EACCES)
error = EPERM;
vnode_put(vp);
return (error);
}
int
chown(__unused proc_t p, struct chown_args *uap, int32_t *retval)
{
return chown1(vfs_context_current(), uap, retval, 1);
}
int
lchown(__unused proc_t p, struct lchown_args *uap, int32_t *retval)
{
return chown1(vfs_context_current(), (struct chown_args *)uap, retval, 0);
}
int
fchown(__unused proc_t p, struct fchown_args *uap, __unused int32_t *retval)
{
struct vnode_attr va;
vfs_context_t ctx = vfs_context_current();
vnode_t vp;
int error;
kauth_action_t action;
AUDIT_ARG(owner, uap->uid, uap->gid);
AUDIT_ARG(fd, uap->fd);
if ( (error = file_vnode(uap->fd, &vp)) )
return (error);
if ( (error = vnode_getwithref(vp)) ) {
file_drop(uap->fd);
return(error);
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
VATTR_INIT(&va);
if (uap->uid != VNOVAL)
VATTR_SET(&va, va_uid, uap->uid);
if (uap->gid != VNOVAL)
VATTR_SET(&va, va_gid, uap->gid);
#if NAMEDSTREAMS
if (vp->v_flag & VISNAMEDSTREAM) {
error = EPERM;
goto out;
}
#endif
#if CONFIG_MACF
error = mac_vnode_check_setowner(ctx, vp, uap->uid, uap->gid);
if (error)
goto out;
#endif
if ((error = vnode_authattr(vp, &va, &action, ctx)) != 0)
goto out;
if (action && ((error = vnode_authorize(vp, NULL, action, ctx)) != 0)) {
if (error == EACCES)
error = EPERM;
goto out;
}
error = vnode_setattr(vp, &va, ctx);
out:
(void)vnode_put(vp);
file_drop(uap->fd);
return (error);
}
static int
getutimes(user_addr_t usrtvp, struct timespec *tsp)
{
int error;
if (usrtvp == USER_ADDR_NULL) {
struct timeval old_tv;
microtime(&old_tv);
TIMEVAL_TO_TIMESPEC(&old_tv, &tsp[0]);
tsp[1] = tsp[0];
} else {
if (IS_64BIT_PROCESS(current_proc())) {
struct user64_timeval tv[2];
error = copyin(usrtvp, (void *)tv, sizeof(tv));
if (error)
return (error);
TIMEVAL_TO_TIMESPEC(&tv[0], &tsp[0]);
TIMEVAL_TO_TIMESPEC(&tv[1], &tsp[1]);
} else {
struct user32_timeval tv[2];
error = copyin(usrtvp, (void *)tv, sizeof(tv));
if (error)
return (error);
TIMEVAL_TO_TIMESPEC(&tv[0], &tsp[0]);
TIMEVAL_TO_TIMESPEC(&tv[1], &tsp[1]);
}
}
return 0;
}
static int
setutimes(vfs_context_t ctx, vnode_t vp, const struct timespec *ts,
int nullflag)
{
int error;
struct vnode_attr va;
kauth_action_t action;
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
VATTR_INIT(&va);
VATTR_SET(&va, va_access_time, ts[0]);
VATTR_SET(&va, va_modify_time, ts[1]);
if (nullflag)
va.va_vaflags |= VA_UTIMES_NULL;
#if NAMEDSTREAMS
if (vp->v_flag & VISNAMEDSTREAM) {
error = EPERM;
goto out;
}
#endif
#if CONFIG_MACF
error = mac_vnode_check_setutimes(ctx, vp, ts[0], ts[1]);
if (error)
goto out;
#endif
if ((error = vnode_authattr(vp, &va, &action, ctx)) != 0) {
if (!nullflag && error == EACCES)
error = EPERM;
goto out;
}
if ((action != 0) && ((error = vnode_authorize(vp, NULL, action, ctx)) != 0)) {
if (!nullflag && error == EACCES)
error = EPERM;
goto out;
}
error = vnode_setattr(vp, &va, ctx);
out:
return error;
}
int
utimes(__unused proc_t p, struct utimes_args *uap, __unused int32_t *retval)
{
struct timespec ts[2];
user_addr_t usrtvp;
int error;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
nameidone(&nd);
usrtvp = uap->tptr;
if ((error = getutimes(usrtvp, ts)) != 0)
goto out;
error = setutimes(ctx, nd.ni_vp, ts, usrtvp == USER_ADDR_NULL);
out:
vnode_put(nd.ni_vp);
return (error);
}
int
futimes(__unused proc_t p, struct futimes_args *uap, __unused int32_t *retval)
{
struct timespec ts[2];
vnode_t vp;
user_addr_t usrtvp;
int error;
AUDIT_ARG(fd, uap->fd);
usrtvp = uap->tptr;
if ((error = getutimes(usrtvp, ts)) != 0)
return (error);
if ((error = file_vnode(uap->fd, &vp)) != 0)
return (error);
if((error = vnode_getwithref(vp))) {
file_drop(uap->fd);
return(error);
}
error = setutimes(vfs_context_current(), vp, ts, usrtvp == 0);
vnode_put(vp);
file_drop(uap->fd);
return(error);
}
int
truncate(__unused proc_t p, struct truncate_args *uap, __unused int32_t *retval)
{
vnode_t vp;
struct vnode_attr va;
vfs_context_t ctx = vfs_context_current();
int error;
struct nameidata nd;
kauth_action_t action;
if (uap->length < 0)
return(EINVAL);
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
if ((error = namei(&nd)))
return (error);
vp = nd.ni_vp;
nameidone(&nd);
VATTR_INIT(&va);
VATTR_SET(&va, va_data_size, uap->length);
#if CONFIG_MACF
error = mac_vnode_check_truncate(ctx, NOCRED, vp);
if (error)
goto out;
#endif
if ((error = vnode_authattr(vp, &va, &action, ctx)) != 0)
goto out;
if ((action != 0) && ((error = vnode_authorize(vp, NULL, action, ctx)) != 0))
goto out;
error = vnode_setattr(vp, &va, ctx);
out:
vnode_put(vp);
return (error);
}
int
ftruncate(proc_t p, struct ftruncate_args *uap, int32_t *retval)
{
vfs_context_t ctx = vfs_context_current();
struct vnode_attr va;
vnode_t vp;
struct fileproc *fp;
int error ;
int fd = uap->fd;
AUDIT_ARG(fd, uap->fd);
if (uap->length < 0)
return(EINVAL);
if ( (error = fp_lookup(p,fd,&fp,0)) ) {
return(error);
}
if (fp->f_fglob->fg_type == DTYPE_PSXSHM) {
error = pshm_truncate(p, fp, uap->fd, uap->length, retval);
goto out;
}
if (fp->f_fglob->fg_type != DTYPE_VNODE) {
error = EINVAL;
goto out;
}
vp = (vnode_t)fp->f_fglob->fg_data;
if ((fp->f_fglob->fg_flag & FWRITE) == 0) {
AUDIT_ARG(vnpath_withref, vp, ARG_VNODE1);
error = EINVAL;
goto out;
}
if ((error = vnode_getwithref(vp)) != 0) {
goto out;
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
#if CONFIG_MACF
error = mac_vnode_check_truncate(ctx,
fp->f_fglob->fg_cred, vp);
if (error) {
(void)vnode_put(vp);
goto out;
}
#endif
VATTR_INIT(&va);
VATTR_SET(&va, va_data_size, uap->length);
error = vnode_setattr(vp, &va, ctx);
(void)vnode_put(vp);
out:
file_drop(fd);
return (error);
}
int
fsync(proc_t p, struct fsync_args *uap, __unused int32_t *retval)
{
__pthread_testcancel(1);
return(fsync_common(p, uap, MNT_WAIT));
}
int
fsync_nocancel(proc_t p, struct fsync_nocancel_args *uap, __unused int32_t *retval)
{
return(fsync_common(p, (struct fsync_args *)uap, MNT_WAIT));
}
int
fdatasync(proc_t p, struct fdatasync_args *uap, __unused int32_t *retval)
{
__pthread_testcancel(1);
return(fsync_common(p, (struct fsync_args *)uap, MNT_DWAIT));
}
static int
fsync_common(proc_t p, struct fsync_args *uap, int flags)
{
vnode_t vp;
struct fileproc *fp;
vfs_context_t ctx = vfs_context_current();
int error;
AUDIT_ARG(fd, uap->fd);
if ( (error = fp_getfvp(p, uap->fd, &fp, &vp)) )
return (error);
if ( (error = vnode_getwithref(vp)) ) {
file_drop(uap->fd);
return(error);
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
error = VNOP_FSYNC(vp, flags, ctx);
#if NAMEDRSRCFORK
if ((error == 0) &&
(vp->v_flag & VISNAMEDSTREAM) &&
(vp->v_parent != NULLVP) &&
vnode_isshadow(vp) &&
(fp->f_flags & FP_WRITTEN)) {
(void) vnode_flushnamedstream(vp->v_parent, vp, ctx);
}
#endif
(void)vnode_put(vp);
file_drop(uap->fd);
return (error);
}
int
copyfile(__unused proc_t p, struct copyfile_args *uap, __unused int32_t *retval)
{
vnode_t tvp, fvp, tdvp, sdvp;
struct nameidata fromnd, tond;
int error;
vfs_context_t ctx = vfs_context_current();
if (uap->flags & ~CPF_MASK) {
return(EINVAL);
}
NDINIT(&fromnd, LOOKUP, SAVESTART | AUDITVNPATH1,
UIO_USERSPACE, uap->from, ctx);
if ((error = namei(&fromnd)))
return (error);
fvp = fromnd.ni_vp;
NDINIT(&tond, CREATE, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | AUDITVNPATH2 | CN_NBMOUNTLOOK,
UIO_USERSPACE, uap->to, ctx);
if ((error = namei(&tond))) {
goto out1;
}
tdvp = tond.ni_dvp;
tvp = tond.ni_vp;
if (tvp != NULL) {
if (!(uap->flags & CPF_OVERWRITE)) {
error = EEXIST;
goto out;
}
}
if (fvp->v_type == VDIR || (tvp && tvp->v_type == VDIR)) {
error = EISDIR;
goto out;
}
if ((error = vnode_authorize(tdvp, NULL, KAUTH_VNODE_ADD_FILE, ctx)) != 0)
goto out;
if (fvp == tdvp)
error = EINVAL;
if (fvp == tvp)
error = -1;
if (!error)
error = VNOP_COPYFILE(fvp, tdvp, tvp, &tond.ni_cnd, uap->mode, uap->flags, ctx);
out:
sdvp = tond.ni_startdir;
nameidone(&tond);
if (tvp)
vnode_put(tvp);
vnode_put(tdvp);
vnode_put(sdvp);
out1:
vnode_put(fvp);
if (fromnd.ni_startdir)
vnode_put(fromnd.ni_startdir);
nameidone(&fromnd);
if (error == -1)
return (0);
return (error);
}
int
rename(__unused proc_t p, struct rename_args *uap, __unused int32_t *retval)
{
vnode_t tvp, tdvp;
vnode_t fvp, fdvp;
struct nameidata fromnd, tond;
vfs_context_t ctx = vfs_context_current();
int error;
int do_retry;
int mntrename;
int need_event;
const char *oname;
char *from_name = NULL, *to_name = NULL;
int from_len=0, to_len=0;
int holding_mntlock;
mount_t locked_mp = NULL;
vnode_t oparent;
#if CONFIG_FSE
fse_info from_finfo, to_finfo;
#endif
int from_truncated=0, to_truncated;
holding_mntlock = 0;
do_retry = 0;
retry:
fvp = tvp = NULL;
fdvp = tdvp = NULL;
mntrename = FALSE;
NDINIT(&fromnd, DELETE, WANTPARENT | AUDITVNPATH1, UIO_USERSPACE, uap->from, ctx);
if ( (error = namei(&fromnd)) )
goto out1;
fdvp = fromnd.ni_dvp;
fvp = fromnd.ni_vp;
#if CONFIG_MACF
error = mac_vnode_check_rename_from(ctx, fdvp, fvp, &fromnd.ni_cnd);
if (error)
goto out1;
#endif
NDINIT(&tond, RENAME, WANTPARENT | AUDITVNPATH2 | CN_NBMOUNTLOOK , UIO_USERSPACE, uap->to, ctx);
if (fvp->v_type == VDIR)
tond.ni_cnd.cn_flags |= WILLBEDIR;
if ( (error = namei(&tond)) ) {
if (error == EISDIR && fvp->v_type == VDIR)
error = EINVAL;
goto out1;
}
tdvp = tond.ni_dvp;
tvp = tond.ni_vp;
#if CONFIG_MACF
error = mac_vnode_check_rename_to(ctx,
tdvp, tvp, fdvp == tdvp, &tond.ni_cnd);
if (error)
goto out1;
#endif
if (tvp != NULL) {
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
error = ENOTDIR;
goto out1;
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
error = EISDIR;
goto out1;
}
}
if (fvp == tdvp) {
error = EINVAL;
goto out1;
}
if (fvp == tvp) {
int pathconf_val;
if (VNOP_PATHCONF(fvp, _PC_CASE_SENSITIVE, &pathconf_val, ctx) != 0 ||
pathconf_val != 0) {
goto out1;
}
}
{
int moving = 0;
error = 0;
if ((tvp != NULL) && vnode_isdir(tvp)) {
if (tvp != fdvp)
moving = 1;
} else if (tdvp != fdvp) {
moving = 1;
}
if (vnode_isdir(fvp)) {
if ((error = vnode_authorize(fvp, fdvp, KAUTH_VNODE_DELETE | KAUTH_VNODE_ADD_SUBDIRECTORY, ctx)) != 0)
goto auth_exit;
} else {
if ((error = vnode_authorize(fvp, fdvp, KAUTH_VNODE_DELETE, ctx)) != 0)
goto auth_exit;
}
if (moving) {
if ((error = vnode_authorize(((tvp != NULL) && vnode_isdir(tvp)) ? tvp : tdvp,
NULL,
vnode_isdir(fvp) ? KAUTH_VNODE_ADD_SUBDIRECTORY : KAUTH_VNODE_ADD_FILE,
ctx)) != 0) {
if (error == ENOENT) {
do_retry = 1;
}
goto auth_exit;
}
} else {
if ((error = vnode_authorize(fdvp, NULL,
vnode_isdir(fvp) ? KAUTH_VNODE_ADD_SUBDIRECTORY : KAUTH_VNODE_ADD_FILE, ctx)) != 0)
goto auth_exit;
}
if ((tvp != NULL) && !vnode_isdir(tvp) &&
((error = vnode_authorize(tvp, tdvp, KAUTH_VNODE_DELETE, ctx)) != 0)) {
if (error == ENOENT) {
do_retry = 1;
}
goto auth_exit;
}
auth_exit:
if (error != 0)
goto out1;
}
if ((fvp->v_flag & VROOT) &&
(fvp->v_type == VDIR) &&
(tvp == NULL) &&
(fvp->v_mountedhere == NULL) &&
(fdvp == tdvp) &&
((fvp->v_mount->mnt_flag & (MNT_UNION | MNT_ROOTFS)) == 0) &&
(fvp->v_mount->mnt_vnodecovered != NULLVP)) {
vnode_t coveredvp;
coveredvp = fvp->v_mount->mnt_vnodecovered;
if ( (vnode_getwithref(coveredvp)) ) {
error = ENOENT;
goto out1;
}
vnode_put(fvp);
fvp = coveredvp;
mntrename = TRUE;
}
if ((fvp->v_mount != tdvp->v_mount) ||
(tvp && (fvp->v_mount != tvp->v_mount))) {
error = EXDEV;
goto out1;
}
if (fvp->v_type == VDIR &&
((fdvp == fvp) ||
(fromnd.ni_cnd.cn_namelen == 1 && fromnd.ni_cnd.cn_nameptr[0] == '.') ||
((fromnd.ni_cnd.cn_flags | tond.ni_cnd.cn_flags) & ISDOTDOT)) ) {
error = EINVAL;
goto out1;
}
if (tdvp->v_parent == fvp) {
error = EINVAL;
goto out1;
}
if (fvp == tvp && fdvp == tdvp) {
if (fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
!bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,
fromnd.ni_cnd.cn_namelen)) {
goto out1;
}
}
if (holding_mntlock && fvp->v_mount != locked_mp) {
mount_unlock_renames(locked_mp);
mount_drop(locked_mp, 0);
holding_mntlock = 0;
}
if (tdvp != fdvp && fvp->v_type == VDIR) {
if (!holding_mntlock) {
locked_mp = fvp->v_mount;
mount_ref(locked_mp, 0);
nameidone(&tond);
if (tvp)
vnode_put(tvp);
vnode_put(tdvp);
nameidone(&fromnd);
vnode_put(fvp);
vnode_put(fdvp);
mount_lock_renames(locked_mp);
holding_mntlock = 1;
goto retry;
}
} else {
if (holding_mntlock) {
mount_unlock_renames(locked_mp);
mount_drop(locked_mp, 0);
holding_mntlock = 0;
}
}
oname = fvp->v_name;
oparent = fvp->v_parent;
#if CONFIG_FSE
need_event = need_fsevent(FSE_RENAME, fvp);
if (need_event) {
get_fse_info(fvp, &from_finfo, ctx);
if (tvp) {
get_fse_info(tvp, &to_finfo, ctx);
}
}
#else
need_event = 0;
#endif
if (need_event || kauth_authorize_fileop_has_listeners()) {
GET_PATH(from_name);
if (from_name == NULL) {
error = ENOMEM;
goto out1;
}
from_len = safe_getpath(fdvp, fromnd.ni_cnd.cn_nameptr, from_name, MAXPATHLEN, &from_truncated);
GET_PATH(to_name);
if (to_name == NULL) {
error = ENOMEM;
goto out1;
}
to_len = safe_getpath(tdvp, tond.ni_cnd.cn_nameptr, to_name, MAXPATHLEN, &to_truncated);
}
error = VNOP_RENAME(fdvp, fvp, &fromnd.ni_cnd,
tdvp, tvp, &tond.ni_cnd,
ctx);
if (holding_mntlock) {
mount_unlock_renames(locked_mp);
mount_drop(locked_mp, 0);
holding_mntlock = 0;
}
if (error) {
if (error == ERECYCLE) {
do_retry = 1;
}
goto out1;
}
kauth_authorize_fileop(vfs_context_ucred(ctx),
KAUTH_FILEOP_RENAME,
(uintptr_t)from_name, (uintptr_t)to_name);
#if CONFIG_FSE
if (from_name != NULL && to_name != NULL) {
if (from_truncated || to_truncated) {
from_finfo.mode |= FSE_TRUNCATED_PATH;
}
if (tvp) {
add_fsevent(FSE_RENAME, ctx,
FSE_ARG_STRING, from_len, from_name,
FSE_ARG_FINFO, &from_finfo,
FSE_ARG_STRING, to_len, to_name,
FSE_ARG_FINFO, &to_finfo,
FSE_ARG_DONE);
} else {
add_fsevent(FSE_RENAME, ctx,
FSE_ARG_STRING, from_len, from_name,
FSE_ARG_FINFO, &from_finfo,
FSE_ARG_STRING, to_len, to_name,
FSE_ARG_DONE);
}
}
#endif
if (mntrename) {
char *cp, *pathend, *mpname;
char * tobuf;
struct mount *mp;
int maxlen;
size_t len = 0;
mp = fvp->v_mountedhere;
if (vfs_busy(mp, LK_NOWAIT)) {
error = EBUSY;
goto out1;
}
MALLOC_ZONE(tobuf, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
error = copyinstr(uap->to, tobuf, MAXPATHLEN, &len);
if (!error) {
pathend = &mp->mnt_vfsstat.f_mntonname[0];
for (cp = pathend; *cp != '\0'; ++cp) {
if (*cp == '/')
pathend = cp + 1;
}
for (mpname = cp = tobuf; *cp != '\0'; ++cp) {
if (*cp == '/')
mpname = cp + 1;
}
maxlen = MAXPATHLEN - (pathend - mp->mnt_vfsstat.f_mntonname);
bzero(pathend, maxlen);
strlcpy(pathend, mpname, maxlen);
}
FREE_ZONE(tobuf, MAXPATHLEN, M_NAMEI);
vfs_unbusy(mp);
}
if (oname == fvp->v_name && oparent == fvp->v_parent) {
int update_flags;
update_flags = VNODE_UPDATE_NAME;
if (fdvp != tdvp)
update_flags |= VNODE_UPDATE_PARENT;
vnode_update_identity(fvp, tdvp, tond.ni_cnd.cn_nameptr, tond.ni_cnd.cn_namelen, tond.ni_cnd.cn_hash, update_flags);
}
out1:
if (to_name != NULL) {
RELEASE_PATH(to_name);
to_name = NULL;
}
if (from_name != NULL) {
RELEASE_PATH(from_name);
from_name = NULL;
}
if (holding_mntlock) {
mount_unlock_renames(locked_mp);
mount_drop(locked_mp, 0);
holding_mntlock = 0;
}
if (tdvp) {
nameidone(&tond);
if (tvp)
vnode_put(tvp);
vnode_put(tdvp);
}
if (fdvp) {
nameidone(&fromnd);
if (fvp)
vnode_put(fvp);
vnode_put(fdvp);
}
if(do_retry) {
do_retry = 0;
goto retry;
}
return (error);
}
static int
mkdir1(vfs_context_t ctx, user_addr_t path, struct vnode_attr *vap)
{
vnode_t vp, dvp;
int error;
int update_flags = 0;
struct nameidata nd;
AUDIT_ARG(mode, vap->va_mode);
NDINIT(&nd, CREATE, LOCKPARENT | AUDITVNPATH1,
UIO_USERSPACE, path, ctx);
nd.ni_cnd.cn_flags |= WILLBEDIR;
error = namei(&nd);
if (error)
return (error);
dvp = nd.ni_dvp;
vp = nd.ni_vp;
if (vp != NULL) {
error = EEXIST;
goto out;
}
VATTR_SET(vap, va_type, VDIR);
#if CONFIG_MACF
error = mac_vnode_check_create(ctx,
nd.ni_dvp, &nd.ni_cnd, vap);
if (error)
goto out;
#endif
if ((error = vnode_authorize(dvp, NULL, KAUTH_VNODE_ADD_SUBDIRECTORY, ctx)) != 0)
goto out;
if ((error = vn_create(dvp, &vp, &nd.ni_cnd, vap, 0, ctx)) != 0)
goto out;
if (vp->v_name == NULL)
update_flags |= VNODE_UPDATE_NAME;
if (vp->v_parent == NULLVP)
update_flags |= VNODE_UPDATE_PARENT;
if (update_flags)
vnode_update_identity(vp, dvp, nd.ni_cnd.cn_nameptr, nd.ni_cnd.cn_namelen, nd.ni_cnd.cn_hash, update_flags);
#if CONFIG_FSE
add_fsevent(FSE_CREATE_DIR, ctx, FSE_ARG_VNODE, vp, FSE_ARG_DONE);
#endif
out:
nameidone(&nd);
if (vp)
vnode_put(vp);
vnode_put(dvp);
return (error);
}
int
mkdir_extended(proc_t p, struct mkdir_extended_args *uap, __unused int32_t *retval)
{
int ciferror;
kauth_filesec_t xsecdst;
struct vnode_attr va;
AUDIT_ARG(owner, uap->uid, uap->gid);
xsecdst = NULL;
if ((uap->xsecurity != USER_ADDR_NULL) &&
((ciferror = kauth_copyinfilesec(uap->xsecurity, &xsecdst)) != 0))
return ciferror;
VATTR_INIT(&va);
VATTR_SET(&va, va_mode, (uap->mode & ACCESSPERMS) & ~p->p_fd->fd_cmask);
if (xsecdst != NULL)
VATTR_SET(&va, va_acl, &xsecdst->fsec_acl);
ciferror = mkdir1(vfs_context_current(), uap->path, &va);
if (xsecdst != NULL)
kauth_filesec_free(xsecdst);
return ciferror;
}
int
mkdir(proc_t p, struct mkdir_args *uap, __unused int32_t *retval)
{
struct vnode_attr va;
VATTR_INIT(&va);
VATTR_SET(&va, va_mode, (uap->mode & ACCESSPERMS) & ~p->p_fd->fd_cmask);
return(mkdir1(vfs_context_current(), uap->path, &va));
}
int
rmdir(__unused proc_t p, struct rmdir_args *uap, __unused int32_t *retval)
{
vnode_t vp, dvp;
int error;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
int restart_flag;
uint32_t oldvp_id = UINT32_MAX;
do {
restart_flag = 0;
NDINIT(&nd, DELETE, LOCKPARENT | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
dvp = nd.ni_dvp;
vp = nd.ni_vp;
if (oldvp_id != UINT32_MAX && oldvp_id != vp->v_id) {
error = ENOENT;
goto out;
}
if (vp->v_type != VDIR) {
error = ENOTDIR;
} else if (dvp == vp) {
error = EINVAL;
} else if (vp->v_flag & VROOT) {
error = EBUSY;
} else {
#if CONFIG_MACF
error = mac_vnode_check_unlink(ctx, dvp,
vp, &nd.ni_cnd);
if (!error)
#endif
error = vnode_authorize(vp, nd.ni_dvp, KAUTH_VNODE_DELETE, ctx);
}
if (!error) {
char *path = NULL;
int len=0;
int has_listeners = 0;
int need_event = 0;
int truncated = 0;
#if CONFIG_FSE
fse_info finfo;
need_event = need_fsevent(FSE_DELETE, dvp);
if (need_event) {
get_fse_info(vp, &finfo, ctx);
}
#endif
has_listeners = kauth_authorize_fileop_has_listeners();
if (need_event || has_listeners) {
GET_PATH(path);
if (path == NULL) {
error = ENOMEM;
goto out;
}
len = safe_getpath(vp, NULL, path, MAXPATHLEN, &truncated);
#if CONFIG_FSE
if (truncated) {
finfo.mode |= FSE_TRUNCATED_PATH;
}
#endif
}
error = VNOP_RMDIR(dvp, vp, &nd.ni_cnd, ctx);
if (error == ENOTEMPTY) {
error = rmdir_remove_orphaned_appleDouble(vp, ctx, &restart_flag);
if (error == EBUSY) {
oldvp_id = vp->v_id;
goto out;
}
if (!error)
error = VNOP_RMDIR(dvp, vp, &nd.ni_cnd, ctx);
}
if (!error) {
if (has_listeners) {
kauth_authorize_fileop(vfs_context_ucred(ctx),
KAUTH_FILEOP_DELETE,
(uintptr_t)vp,
(uintptr_t)path);
}
if (vp->v_flag & VISHARDLINK) {
vnode_update_identity(vp, NULL, NULL, 0, 0, VNODE_UPDATE_PARENT);
}
#if CONFIG_FSE
if (need_event) {
add_fsevent(FSE_DELETE, ctx,
FSE_ARG_STRING, len, path,
FSE_ARG_FINFO, &finfo,
FSE_ARG_DONE);
}
#endif
}
if (path != NULL)
RELEASE_PATH(path);
}
out:
nameidone(&nd);
vnode_put(dvp);
vnode_put(vp);
if (restart_flag == 0) {
wakeup_one((caddr_t)vp);
return (error);
}
tsleep(vp, PVFS, "rm AD", 1);
} while (restart_flag != 0);
return (error);
}
#define DIRENT64_LEN(namlen) \
((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 7) & ~7)
static errno_t
vnode_readdir64(struct vnode *vp, struct uio *uio, int flags, int *eofflag,
int *numdirent, vfs_context_t ctxp)
{
if (vp->v_mount->mnt_vtable->vfc_vfsflags & VFC_VFSREADDIR_EXTENDED) {
return VNOP_READDIR(vp, uio, flags, eofflag, numdirent, ctxp);
} else {
size_t bufsize;
void * bufptr;
uio_t auio;
struct direntry entry64;
struct dirent *dep;
int bytesread;
int error;
bufsize = 3 * MIN(uio_resid(uio), 87371) / 8;
MALLOC(bufptr, void *, bufsize, M_TEMP, M_WAITOK);
if (bufptr == NULL) {
return ENOMEM;
}
auio = uio_create(1, 0, UIO_SYSSPACE, UIO_READ);
uio_addiov(auio, (uintptr_t)bufptr, bufsize);
auio->uio_offset = uio->uio_offset;
error = VNOP_READDIR(vp, auio, 0, eofflag, numdirent, ctxp);
dep = (struct dirent *)bufptr;
bytesread = bufsize - uio_resid(auio);
while (error == 0 && (char *)dep < ((char *)bufptr + bytesread)) {
entry64.d_ino = dep->d_ino;
entry64.d_seekoff = 0;
entry64.d_reclen = DIRENT64_LEN(dep->d_namlen);
entry64.d_namlen = dep->d_namlen;
entry64.d_type = dep->d_type;
bcopy(dep->d_name, entry64.d_name, dep->d_namlen + 1);
dep = (struct dirent *)((char *)dep + dep->d_reclen);
error = uiomove((caddr_t)&entry64, entry64.d_reclen, uio);
}
if (error == 0) {
uio->uio_offset = auio->uio_offset;
}
uio_free(auio);
FREE(bufptr, M_TEMP);
return (error);
}
}
static int
getdirentries_common(int fd, user_addr_t bufp, user_size_t bufsize, ssize_t *bytesread,
off_t *offset, int flags)
{
vnode_t vp;
struct vfs_context context = *vfs_context_current();
struct fileproc *fp;
uio_t auio;
int spacetype = proc_is64bit(vfs_context_proc(&context)) ? UIO_USERSPACE64 : UIO_USERSPACE32;
off_t loff;
int error, eofflag, numdirent;
char uio_buf[ UIO_SIZEOF(1) ];
error = fp_getfvp(vfs_context_proc(&context), fd, &fp, &vp);
if (error) {
return (error);
}
if ((fp->f_fglob->fg_flag & FREAD) == 0) {
AUDIT_ARG(vnpath_withref, vp, ARG_VNODE1);
error = EBADF;
goto out;
}
#if CONFIG_MACF
error = mac_file_check_change_offset(vfs_context_ucred(&context), fp->f_fglob);
if (error)
goto out;
#endif
if ( (error = vnode_getwithref(vp)) ) {
goto out;
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
unionread:
if (vp->v_type != VDIR) {
(void)vnode_put(vp);
error = EINVAL;
goto out;
}
#if CONFIG_MACF
error = mac_vnode_check_readdir(&context, vp);
if (error != 0) {
(void)vnode_put(vp);
goto out;
}
#endif
loff = fp->f_fglob->fg_offset;
auio = uio_createwithbuffer(1, loff, spacetype, UIO_READ, &uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, bufp, bufsize);
if (flags & VNODE_READDIR_EXTENDED) {
error = vnode_readdir64(vp, auio, flags, &eofflag, &numdirent, &context);
fp->f_fglob->fg_offset = uio_offset(auio);
} else {
error = VNOP_READDIR(vp, auio, 0, &eofflag, &numdirent, &context);
fp->f_fglob->fg_offset = uio_offset(auio);
}
if (error) {
(void)vnode_put(vp);
goto out;
}
if ((user_ssize_t)bufsize == uio_resid(auio)){
if (union_dircheckp) {
error = union_dircheckp(&vp, fp, &context);
if (error == -1)
goto unionread;
if (error)
goto out;
}
if ((vp->v_flag & VROOT) && (vp->v_mount->mnt_flag & MNT_UNION)) {
struct vnode *tvp = vp;
vp = vp->v_mount->mnt_vnodecovered;
vnode_getwithref(vp);
vnode_ref(vp);
fp->f_fglob->fg_data = (caddr_t) vp;
fp->f_fglob->fg_offset = 0;
vnode_rele(tvp);
vnode_put(tvp);
goto unionread;
}
}
vnode_put(vp);
if (offset) {
*offset = loff;
}
*bytesread = bufsize - uio_resid(auio);
out:
file_drop(fd);
return (error);
}
int
getdirentries(__unused struct proc *p, struct getdirentries_args *uap, int32_t *retval)
{
off_t offset;
ssize_t bytesread;
int error;
AUDIT_ARG(fd, uap->fd);
error = getdirentries_common(uap->fd, uap->buf, uap->count, &bytesread, &offset, 0);
if (error == 0) {
if (proc_is64bit(p)) {
user64_long_t base = (user64_long_t)offset;
error = copyout((caddr_t)&base, uap->basep, sizeof(user64_long_t));
} else {
user32_long_t base = (user32_long_t)offset;
error = copyout((caddr_t)&base, uap->basep, sizeof(user32_long_t));
}
*retval = bytesread;
}
return (error);
}
int
getdirentries64(__unused struct proc *p, struct getdirentries64_args *uap, user_ssize_t *retval)
{
off_t offset;
ssize_t bytesread;
int error;
AUDIT_ARG(fd, uap->fd);
error = getdirentries_common(uap->fd, uap->buf, uap->bufsize, &bytesread, &offset, VNODE_READDIR_EXTENDED);
if (error == 0) {
*retval = bytesread;
error = copyout((caddr_t)&offset, uap->position, sizeof(off_t));
}
return (error);
}
#define UMASK_NOXSECURITY (void *)1
static int
umask1(proc_t p, int newmask, __unused kauth_filesec_t fsec, int32_t *retval)
{
struct filedesc *fdp;
AUDIT_ARG(mask, newmask);
proc_fdlock(p);
fdp = p->p_fd;
*retval = fdp->fd_cmask;
fdp->fd_cmask = newmask & ALLPERMS;
proc_fdunlock(p);
return (0);
}
int
umask_extended(proc_t p, struct umask_extended_args *uap, int32_t *retval)
{
int ciferror;
kauth_filesec_t xsecdst;
xsecdst = KAUTH_FILESEC_NONE;
if (uap->xsecurity != USER_ADDR_NULL) {
if ((ciferror = kauth_copyinfilesec(uap->xsecurity, &xsecdst)) != 0)
return ciferror;
} else {
xsecdst = KAUTH_FILESEC_NONE;
}
ciferror = umask1(p, uap->newmask, xsecdst, retval);
if (xsecdst != KAUTH_FILESEC_NONE)
kauth_filesec_free(xsecdst);
return ciferror;
}
int
umask(proc_t p, struct umask_args *uap, int32_t *retval)
{
return(umask1(p, uap->newmask, UMASK_NOXSECURITY, retval));
}
int
revoke(proc_t p, struct revoke_args *uap, __unused int32_t *retval)
{
vnode_t vp;
struct vnode_attr va;
vfs_context_t ctx = vfs_context_current();
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
nameidone(&nd);
if (!(vnode_ischr(vp) || vnode_isblk(vp))) {
error = ENOTSUP;
goto out;
}
if (vnode_isblk(vp) && vnode_ismountedon(vp)) {
error = EBUSY;
goto out;
}
#if CONFIG_MACF
error = mac_vnode_check_revoke(ctx, vp);
if (error)
goto out;
#endif
VATTR_INIT(&va);
VATTR_WANTED(&va, va_uid);
if ((error = vnode_getattr(vp, &va, ctx)))
goto out;
if (kauth_cred_getuid(vfs_context_ucred(ctx)) != va.va_uid &&
(error = suser(vfs_context_ucred(ctx), &p->p_acflag)))
goto out;
if (vp->v_usecount > 0 || (vnode_isaliased(vp)))
VNOP_REVOKE(vp, REVOKEALL, ctx);
out:
vnode_put(vp);
return (error);
}
#ifdef __APPLE_API_OBSOLETE
int
mkcomplex(__unused proc_t p, __unused struct mkcomplex_args *uap, __unused int32_t *retval)
{
return (ENOTSUP);
}
int
statv(__unused proc_t p,
__unused struct statv_args *uap,
__unused int32_t *retval)
{
return (ENOTSUP);
}
int
lstatv(__unused proc_t p,
__unused struct lstatv_args *uap,
__unused int32_t *retval)
{
return (ENOTSUP);
}
int
fstatv(__unused proc_t p,
__unused struct fstatv_args *uap,
__unused int32_t *retval)
{
return (ENOTSUP);
}
#endif
int
getdirentriesattr (proc_t p, struct getdirentriesattr_args *uap, int32_t *retval)
{
vnode_t vp;
struct fileproc *fp;
uio_t auio = NULL;
int spacetype = proc_is64bit(p) ? UIO_USERSPACE64 : UIO_USERSPACE32;
uint32_t count;
uint32_t newstate;
int error, eofflag;
uint32_t loff;
struct attrlist attributelist;
vfs_context_t ctx = vfs_context_current();
int fd = uap->fd;
char uio_buf[ UIO_SIZEOF(1) ];
kauth_action_t action;
AUDIT_ARG(fd, fd);
if ((error = copyin(uap->alist, (caddr_t)&attributelist, sizeof(attributelist)))) {
return(error);
}
if ((error = copyin(uap->count, (caddr_t)&count, sizeof(count)))) {
return(error);
}
if ( (error = fp_getfvp(p, fd, &fp, &vp)) ) {
return (error);
}
if ((fp->f_fglob->fg_flag & FREAD) == 0) {
AUDIT_ARG(vnpath_withref, vp, ARG_VNODE1);
error = EBADF;
goto out;
}
#if CONFIG_MACF
error = mac_file_check_change_offset(vfs_context_ucred(ctx),
fp->f_fglob);
if (error)
goto out;
#endif
if ( (error = vnode_getwithref(vp)) )
goto out;
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
if (vp->v_type != VDIR) {
(void)vnode_put(vp);
error = EINVAL;
goto out;
}
#if CONFIG_MACF
error = mac_vnode_check_readdir(ctx, vp);
if (error != 0) {
(void)vnode_put(vp);
goto out;
}
#endif
loff = fp->f_fglob->fg_offset;
auio = uio_createwithbuffer(1, loff, spacetype, UIO_READ,
&uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, uap->buffer, uap->buffersize);
action = KAUTH_VNODE_LIST_DIRECTORY;
if ((attributelist.commonattr & ~ATTR_CMN_NAME) ||
attributelist.fileattr || attributelist.dirattr)
action |= KAUTH_VNODE_SEARCH;
if ((error = vnode_authorize(vp, NULL, action, ctx)) == 0) {
error = VNOP_READDIRATTR(vp, &attributelist, auio,
count,
(u_long)(uint32_t)uap->options, &newstate, &eofflag,
&count, ctx);
}
(void)vnode_put(vp);
if (error)
goto out;
fp->f_fglob->fg_offset = uio_offset(auio);
if ((error = copyout((caddr_t) &count, uap->count, sizeof(count))))
goto out;
if ((error = copyout((caddr_t) &newstate, uap->newstate, sizeof(newstate))))
goto out;
if ((error = copyout((caddr_t) &loff, uap->basep, sizeof(loff))))
goto out;
*retval = eofflag;
error = 0;
out:
file_drop(fd);
return (error);
}
int
exchangedata (__unused proc_t p, struct exchangedata_args *uap, __unused int32_t *retval)
{
struct nameidata fnd, snd;
vfs_context_t ctx = vfs_context_current();
vnode_t fvp;
vnode_t svp;
int error;
u_int32_t nameiflags;
char *fpath = NULL;
char *spath = NULL;
int flen=0, slen=0;
int from_truncated=0, to_truncated=0;
#if CONFIG_FSE
fse_info f_finfo, s_finfo;
#endif
nameiflags = 0;
if ((uap->options & FSOPT_NOFOLLOW) == 0) nameiflags |= FOLLOW;
NDINIT(&fnd, LOOKUP, nameiflags | AUDITVNPATH1,
UIO_USERSPACE, uap->path1, ctx);
error = namei(&fnd);
if (error)
goto out2;
nameidone(&fnd);
fvp = fnd.ni_vp;
NDINIT(&snd, LOOKUP | CN_NBMOUNTLOOK, nameiflags | AUDITVNPATH2,
UIO_USERSPACE, uap->path2, ctx);
error = namei(&snd);
if (error) {
vnode_put(fvp);
goto out2;
}
nameidone(&snd);
svp = snd.ni_vp;
if (svp == fvp) {
error = EINVAL;
goto out;
}
if (svp->v_mount != fvp->v_mount) {
error = EXDEV;
goto out;
}
#if CONFIG_MACF
error = mac_vnode_check_exchangedata(ctx,
fvp, svp);
if (error)
goto out;
#endif
if (((error = vnode_authorize(fvp, NULL, KAUTH_VNODE_READ_DATA | KAUTH_VNODE_WRITE_DATA, ctx)) != 0) ||
((error = vnode_authorize(svp, NULL, KAUTH_VNODE_READ_DATA | KAUTH_VNODE_WRITE_DATA, ctx)) != 0))
goto out;
if (
#if CONFIG_FSE
need_fsevent(FSE_EXCHANGE, fvp) ||
#endif
kauth_authorize_fileop_has_listeners()) {
GET_PATH(fpath);
GET_PATH(spath);
if (fpath == NULL || spath == NULL) {
error = ENOMEM;
goto out;
}
flen = safe_getpath(fvp, NULL, fpath, MAXPATHLEN, &from_truncated);
slen = safe_getpath(svp, NULL, spath, MAXPATHLEN, &to_truncated);
#if CONFIG_FSE
get_fse_info(fvp, &f_finfo, ctx);
get_fse_info(svp, &s_finfo, ctx);
if (from_truncated || to_truncated) {
f_finfo.mode |= FSE_TRUNCATED_PATH;
}
#endif
}
error = VNOP_EXCHANGE(fvp, svp, 0, ctx);
if (error == 0) {
const char *tmpname;
if (fpath != NULL && spath != NULL) {
kauth_authorize_fileop(vfs_context_ucred(ctx), KAUTH_FILEOP_EXCHANGE,
(uintptr_t)fpath, (uintptr_t)spath);
}
name_cache_lock();
tmpname = fvp->v_name;
fvp->v_name = svp->v_name;
svp->v_name = tmpname;
if (fvp->v_parent != svp->v_parent) {
vnode_t tmp;
tmp = fvp->v_parent;
fvp->v_parent = svp->v_parent;
svp->v_parent = tmp;
}
name_cache_unlock();
#if CONFIG_FSE
if (fpath != NULL && spath != NULL) {
add_fsevent(FSE_EXCHANGE, ctx,
FSE_ARG_STRING, flen, fpath,
FSE_ARG_FINFO, &f_finfo,
FSE_ARG_STRING, slen, spath,
FSE_ARG_FINFO, &s_finfo,
FSE_ARG_DONE);
}
#endif
}
out:
if (fpath != NULL)
RELEASE_PATH(fpath);
if (spath != NULL)
RELEASE_PATH(spath);
vnode_put(svp);
vnode_put(fvp);
out2:
return (error);
}
int
searchfs(proc_t p, struct searchfs_args *uap, __unused int32_t *retval)
{
vnode_t vp;
int error=0;
int fserror = 0;
struct nameidata nd;
struct user64_fssearchblock searchblock;
struct searchstate *state;
struct attrlist *returnattrs;
struct timeval timelimit;
void *searchparams1,*searchparams2;
uio_t auio = NULL;
int spacetype = proc_is64bit(p) ? UIO_USERSPACE64 : UIO_USERSPACE32;
uint32_t nummatches;
int mallocsize;
uint32_t nameiflags;
vfs_context_t ctx = vfs_context_current();
char uio_buf[ UIO_SIZEOF(1) ];
if (IS_64BIT_PROCESS(p)) {
error = copyin(uap->searchblock, (caddr_t) &searchblock, sizeof(searchblock));
timelimit.tv_sec = searchblock.timelimit.tv_sec;
timelimit.tv_usec = searchblock.timelimit.tv_usec;
}
else {
struct user32_fssearchblock tmp_searchblock;
error = copyin(uap->searchblock, (caddr_t) &tmp_searchblock, sizeof(tmp_searchblock));
searchblock.returnattrs = CAST_USER_ADDR_T(tmp_searchblock.returnattrs);
searchblock.returnbuffer = CAST_USER_ADDR_T(tmp_searchblock.returnbuffer);
searchblock.returnbuffersize = tmp_searchblock.returnbuffersize;
searchblock.maxmatches = tmp_searchblock.maxmatches;
timelimit.tv_sec = (__darwin_time_t) tmp_searchblock.timelimit.tv_sec;
timelimit.tv_usec = (__darwin_useconds_t) tmp_searchblock.timelimit.tv_usec;
searchblock.searchparams1 = CAST_USER_ADDR_T(tmp_searchblock.searchparams1);
searchblock.sizeofsearchparams1 = tmp_searchblock.sizeofsearchparams1;
searchblock.searchparams2 = CAST_USER_ADDR_T(tmp_searchblock.searchparams2);
searchblock.sizeofsearchparams2 = tmp_searchblock.sizeofsearchparams2;
searchblock.searchattrs = tmp_searchblock.searchattrs;
}
if (error)
return(error);
if (searchblock.sizeofsearchparams1 > SEARCHFS_MAX_SEARCHPARMS ||
searchblock.sizeofsearchparams2 > SEARCHFS_MAX_SEARCHPARMS)
return(EINVAL);
mallocsize = searchblock.sizeofsearchparams1 + searchblock.sizeofsearchparams2 +
sizeof(struct attrlist) + sizeof(struct searchstate);
MALLOC(searchparams1, void *, mallocsize, M_TEMP, M_WAITOK);
searchparams2 = (void *) (((caddr_t) searchparams1) + searchblock.sizeofsearchparams1);
returnattrs = (struct attrlist *) (((caddr_t) searchparams2) + searchblock.sizeofsearchparams2);
state = (struct searchstate *) (((caddr_t) returnattrs) + sizeof (struct attrlist));
if ((error = copyin(searchblock.searchparams1, searchparams1, searchblock.sizeofsearchparams1)))
goto freeandexit;
if ((error = copyin(searchblock.searchparams2, searchparams2, searchblock.sizeofsearchparams2)))
goto freeandexit;
if ((error = copyin(searchblock.returnattrs, (caddr_t) returnattrs, sizeof(struct attrlist))))
goto freeandexit;
if ((error = copyin(uap->state, (caddr_t) state, sizeof(struct searchstate))))
goto freeandexit;
if (searchblock.searchattrs.commonattr & ATTR_CMN_NAME) {
attrreference_t* string_ref;
u_int32_t* start_length;
user64_size_t param_length;
param_length = searchblock.sizeofsearchparams1;
start_length= (u_int32_t*) searchparams1;
start_length= start_length+1;
string_ref= (attrreference_t*) start_length;
if (string_ref->attr_dataoffset < 0 ) {
error = EINVAL;
goto freeandexit;
}
if (string_ref->attr_length > MAXPATHLEN) {
error = EINVAL;
goto freeandexit;
}
if (((char*) string_ref + string_ref->attr_dataoffset) < (char*) string_ref) {
error = EINVAL;
goto freeandexit;
}
if (((char*) string_ref + string_ref->attr_dataoffset) > ((char*)searchparams1 + param_length)) {
error = EINVAL;
goto freeandexit;
}
if (((char*)string_ref + string_ref->attr_dataoffset + string_ref->attr_length) > ((char*)searchparams1 + param_length)) {
error = EINVAL;
goto freeandexit;
}
}
auio = uio_createwithbuffer(1, 0, spacetype, UIO_READ,
&uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, searchblock.returnbuffer, searchblock.returnbuffersize);
nameiflags = 0;
if ((uap->options & FSOPT_NOFOLLOW) == 0) nameiflags |= FOLLOW;
NDINIT(&nd, LOOKUP, nameiflags | AUDITVNPATH1,
UIO_USERSPACE, uap->path, ctx);
error = namei(&nd);
if (error)
goto freeandexit;
nameidone(&nd);
vp = nd.ni_vp;
if (searchblock.maxmatches == 0) {
nummatches = 0;
goto saveandexit;
}
fserror = VNOP_SEARCHFS(vp,
searchparams1,
searchparams2,
&searchblock.searchattrs,
(u_long)searchblock.maxmatches,
&timelimit,
returnattrs,
&nummatches,
(u_long)uap->scriptcode,
(u_long)uap->options,
auio,
state,
ctx);
saveandexit:
vnode_put(vp);
if ((error = copyout((caddr_t) state, uap->state, sizeof(struct searchstate))) != 0)
goto freeandexit;
if ((error = suulong(uap->nummatches, (uint64_t)nummatches)) != 0)
goto freeandexit;
error = fserror;
freeandexit:
FREE(searchparams1,M_TEMP);
return(error);
}
static int
fsctl_internal(proc_t p, vnode_t *arg_vp, u_long cmd, user_addr_t udata, u_long options, vfs_context_t ctx)
{
int error=0;
boolean_t is64bit;
u_int size;
#define STK_PARAMS 128
char stkbuf[STK_PARAMS];
caddr_t data, memp;
vnode_t vp = *arg_vp;
size = IOCPARM_LEN(cmd);
if (size > IOCPARM_MAX) return (EINVAL);
is64bit = proc_is64bit(p);
memp = NULL;
if (size > sizeof (stkbuf)) {
if ((memp = (caddr_t)kalloc(size)) == 0) return ENOMEM;
data = memp;
} else {
data = &stkbuf[0];
};
if (cmd & IOC_IN) {
if (size) {
error = copyin(udata, data, size);
if (error) goto FSCtl_Exit;
} else {
if (is64bit) {
*(user_addr_t *)data = udata;
}
else {
*(uint32_t *)data = (uint32_t)udata;
}
};
} else if ((cmd & IOC_OUT) && size) {
bzero(data, size);
} else if (cmd & IOC_VOID) {
if (is64bit) {
*(user_addr_t *)data = udata;
}
else {
*(uint32_t *)data = (uint32_t)udata;
}
}
if (IOCBASECMD(cmd) == FSCTL_SYNC_VOLUME) {
mount_t mp = vp->v_mount;
int arg = *(uint32_t*)data;
uint32_t vvid = vp->v_id;
error = mount_iterref (mp, 0);
if (error) {
goto FSCtl_Exit;
}
vnode_put(vp);
(void)sync_callback(mp, (arg & FSCTL_SYNC_WAIT) ? &arg : NULL);
mount_iterdrop(mp);
if (arg & FSCTL_SYNC_FULLSYNC) {
error = vnode_getwithvid (vp, vvid);
if (error == 0) {
error = VNOP_IOCTL(vp, F_FULLFSYNC, (caddr_t)NULL, 0, ctx);
vnode_put (vp);
}
}
*arg_vp = NULL;
} else if (IOCBASECMD(cmd) == FSCTL_SET_PACKAGE_EXTS) {
user_addr_t ext_strings;
uint32_t num_entries;
uint32_t max_width;
if ( (is64bit && size != sizeof(user64_package_ext_info))
|| (is64bit == 0 && size != sizeof(user32_package_ext_info))) {
error = EINVAL;
goto FSCtl_Exit;
}
if (is64bit) {
ext_strings = ((user64_package_ext_info *)data)->strings;
num_entries = ((user64_package_ext_info *)data)->num_entries;
max_width = ((user64_package_ext_info *)data)->max_width;
} else {
ext_strings = CAST_USER_ADDR_T(((user32_package_ext_info *)data)->strings);
num_entries = ((user32_package_ext_info *)data)->num_entries;
max_width = ((user32_package_ext_info *)data)->max_width;
}
error = set_package_extensions_table(ext_strings, num_entries, max_width);
} else if (IOCBASECMD(cmd) == FSCTL_WAIT_FOR_SYNC) {
error = tsleep((caddr_t)&sync_wait_time, PVFS|PCATCH, "sync-wait", 0);
if (error == 0) {
*(uint32_t *)data = (uint32_t)sync_wait_time;
error = 0;
} else {
error *= -1;
}
} else {
error = VNOP_IOCTL(vp, IOCBASECMD(cmd), data, options, ctx);
}
if (error == 0 && (cmd & IOC_OUT) && size)
error = copyout(data, udata, size);
FSCtl_Exit:
if (memp) kfree(memp, size);
return error;
}
int
fsctl (proc_t p, struct fsctl_args *uap, __unused int32_t *retval)
{
int error;
struct nameidata nd;
u_long nameiflags;
vnode_t vp = NULL;
vfs_context_t ctx = vfs_context_current();
AUDIT_ARG(cmd, uap->cmd);
AUDIT_ARG(value32, uap->options);
nameiflags = 0;
if ((uap->options & FSOPT_NOFOLLOW) == 0) nameiflags |= FOLLOW;
NDINIT(&nd, LOOKUP, nameiflags | AUDITVNPATH1, UIO_USERSPACE,
uap->path, ctx);
if ((error = namei(&nd))) goto done;
vp = nd.ni_vp;
nameidone(&nd);
#if CONFIG_MACF
error = mac_mount_check_fsctl(ctx, vnode_mount(vp), uap->cmd);
if (error) {
goto done;
}
#endif
error = fsctl_internal(p, &vp, uap->cmd, (user_addr_t)uap->data, uap->options, ctx);
done:
if (vp)
vnode_put(vp);
return error;
}
int
ffsctl (proc_t p, struct ffsctl_args *uap, __unused int32_t *retval)
{
int error;
vnode_t vp = NULL;
vfs_context_t ctx = vfs_context_current();
int fd = -1;
AUDIT_ARG(fd, uap->fd);
AUDIT_ARG(cmd, uap->cmd);
AUDIT_ARG(value32, uap->options);
if ((error = file_vnode(uap->fd, &vp)))
goto done;
fd = uap->fd;
if ((error = vnode_getwithref(vp))) {
goto done;
}
#if CONFIG_MACF
error = mac_mount_check_fsctl(ctx, vnode_mount(vp), uap->cmd);
if (error) {
goto done;
}
#endif
error = fsctl_internal(p, &vp, uap->cmd, (user_addr_t)uap->data, uap->options, ctx);
done:
if (fd != -1)
file_drop(fd);
if (vp)
vnode_put(vp);
return error;
}
__private_extern__ int
sync_internal(void)
{
int error;
struct sync_args data;
int retval[2];
error = sync(current_proc(), &data, &retval[0]);
return (error);
}
int
getxattr(proc_t p, struct getxattr_args *uap, user_ssize_t *retval)
{
vnode_t vp;
struct nameidata nd;
char attrname[XATTR_MAXNAMELEN+1];
vfs_context_t ctx = vfs_context_current();
uio_t auio = NULL;
int spacetype = IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32;
size_t attrsize = 0;
size_t namelen;
u_int32_t nameiflags;
int error;
char uio_buf[ UIO_SIZEOF(1) ];
if (uap->options & (XATTR_NOSECURITY | XATTR_NODEFAULT))
return (EINVAL);
nameiflags = (uap->options & XATTR_NOFOLLOW) ? 0 : FOLLOW;
NDINIT(&nd, LOOKUP, nameiflags, spacetype, uap->path, ctx);
if ((error = namei(&nd))) {
return (error);
}
vp = nd.ni_vp;
nameidone(&nd);
if ((error = copyinstr(uap->attrname, attrname, sizeof(attrname), &namelen) != 0)) {
goto out;
}
if (xattr_protected(attrname)) {
error = EPERM;
goto out;
}
if (uap->size == 0xffffffff || uap->size == (size_t)-1)
goto no_uio;
if (uap->size > (size_t)XATTR_MAXSIZE)
uap->size = XATTR_MAXSIZE;
if (uap->value) {
auio = uio_createwithbuffer(1, uap->position, spacetype, UIO_READ,
&uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, uap->value, uap->size);
}
no_uio:
error = vn_getxattr(vp, attrname, auio, &attrsize, uap->options, ctx);
out:
vnode_put(vp);
if (auio) {
*retval = uap->size - uio_resid(auio);
} else {
*retval = (user_ssize_t)attrsize;
}
return (error);
}
int
fgetxattr(proc_t p, struct fgetxattr_args *uap, user_ssize_t *retval)
{
vnode_t vp;
char attrname[XATTR_MAXNAMELEN+1];
uio_t auio = NULL;
int spacetype = IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32;
size_t attrsize = 0;
size_t namelen;
int error;
char uio_buf[ UIO_SIZEOF(1) ];
if (uap->options & (XATTR_NOFOLLOW | XATTR_NOSECURITY | XATTR_NODEFAULT))
return (EINVAL);
if ( (error = file_vnode(uap->fd, &vp)) ) {
return (error);
}
if ( (error = vnode_getwithref(vp)) ) {
file_drop(uap->fd);
return(error);
}
if ((error = copyinstr(uap->attrname, attrname, sizeof(attrname), &namelen) != 0)) {
goto out;
}
if (xattr_protected(attrname)) {
error = EPERM;
goto out;
}
if (uap->value && uap->size > 0) {
auio = uio_createwithbuffer(1, uap->position, spacetype, UIO_READ,
&uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, uap->value, uap->size);
}
error = vn_getxattr(vp, attrname, auio, &attrsize, uap->options, vfs_context_current());
out:
(void)vnode_put(vp);
file_drop(uap->fd);
if (auio) {
*retval = uap->size - uio_resid(auio);
} else {
*retval = (user_ssize_t)attrsize;
}
return (error);
}
int
setxattr(proc_t p, struct setxattr_args *uap, int *retval)
{
vnode_t vp;
struct nameidata nd;
char attrname[XATTR_MAXNAMELEN+1];
vfs_context_t ctx = vfs_context_current();
uio_t auio = NULL;
int spacetype = IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32;
size_t namelen;
u_int32_t nameiflags;
int error;
char uio_buf[ UIO_SIZEOF(1) ];
if (uap->options & (XATTR_NOSECURITY | XATTR_NODEFAULT))
return (EINVAL);
if ((error = copyinstr(uap->attrname, attrname, sizeof(attrname), &namelen) != 0)) {
return (error);
}
if (xattr_protected(attrname))
return(EPERM);
if (uap->size != 0 && uap->value == 0) {
return (EINVAL);
}
nameiflags = (uap->options & XATTR_NOFOLLOW) ? 0 : FOLLOW;
NDINIT(&nd, LOOKUP, nameiflags, spacetype, uap->path, ctx);
if ((error = namei(&nd))) {
return (error);
}
vp = nd.ni_vp;
nameidone(&nd);
auio = uio_createwithbuffer(1, uap->position, spacetype, UIO_WRITE,
&uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, uap->value, uap->size);
error = vn_setxattr(vp, attrname, auio, uap->options, ctx);
#if CONFIG_FSE
if (error == 0) {
add_fsevent(FSE_XATTR_MODIFIED, ctx,
FSE_ARG_VNODE, vp,
FSE_ARG_DONE);
}
#endif
vnode_put(vp);
*retval = 0;
return (error);
}
int
fsetxattr(proc_t p, struct fsetxattr_args *uap, int *retval)
{
vnode_t vp;
char attrname[XATTR_MAXNAMELEN+1];
uio_t auio = NULL;
int spacetype = IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32;
size_t namelen;
int error;
char uio_buf[ UIO_SIZEOF(1) ];
vfs_context_t ctx = vfs_context_current();
if (uap->options & (XATTR_NOFOLLOW | XATTR_NOSECURITY | XATTR_NODEFAULT))
return (EINVAL);
if ((error = copyinstr(uap->attrname, attrname, sizeof(attrname), &namelen) != 0)) {
return (error);
}
if (xattr_protected(attrname))
return(EPERM);
if (uap->size != 0 && uap->value == 0) {
return (EINVAL);
}
if ( (error = file_vnode(uap->fd, &vp)) ) {
return (error);
}
if ( (error = vnode_getwithref(vp)) ) {
file_drop(uap->fd);
return(error);
}
auio = uio_createwithbuffer(1, uap->position, spacetype, UIO_WRITE,
&uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, uap->value, uap->size);
error = vn_setxattr(vp, attrname, auio, uap->options, vfs_context_current());
#if CONFIG_FSE
if (error == 0) {
add_fsevent(FSE_XATTR_MODIFIED, ctx,
FSE_ARG_VNODE, vp,
FSE_ARG_DONE);
}
#endif
vnode_put(vp);
file_drop(uap->fd);
*retval = 0;
return (error);
}
int
removexattr(proc_t p, struct removexattr_args *uap, int *retval)
{
vnode_t vp;
struct nameidata nd;
char attrname[XATTR_MAXNAMELEN+1];
int spacetype = IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32;
vfs_context_t ctx = vfs_context_current();
size_t namelen;
u_int32_t nameiflags;
int error;
if (uap->options & (XATTR_NOSECURITY | XATTR_NODEFAULT))
return (EINVAL);
error = copyinstr(uap->attrname, attrname, sizeof(attrname), &namelen);
if (error != 0) {
return (error);
}
if (xattr_protected(attrname))
return(EPERM);
nameiflags = (uap->options & XATTR_NOFOLLOW) ? 0 : FOLLOW;
NDINIT(&nd, LOOKUP, nameiflags, spacetype, uap->path, ctx);
if ((error = namei(&nd))) {
return (error);
}
vp = nd.ni_vp;
nameidone(&nd);
error = vn_removexattr(vp, attrname, uap->options, ctx);
#if CONFIG_FSE
if (error == 0) {
add_fsevent(FSE_XATTR_REMOVED, ctx,
FSE_ARG_VNODE, vp,
FSE_ARG_DONE);
}
#endif
vnode_put(vp);
*retval = 0;
return (error);
}
int
fremovexattr(__unused proc_t p, struct fremovexattr_args *uap, int *retval)
{
vnode_t vp;
char attrname[XATTR_MAXNAMELEN+1];
size_t namelen;
int error;
vfs_context_t ctx = vfs_context_current();
if (uap->options & (XATTR_NOFOLLOW | XATTR_NOSECURITY | XATTR_NODEFAULT))
return (EINVAL);
error = copyinstr(uap->attrname, attrname, sizeof(attrname), &namelen);
if (error != 0) {
return (error);
}
if (xattr_protected(attrname))
return(EPERM);
if ( (error = file_vnode(uap->fd, &vp)) ) {
return (error);
}
if ( (error = vnode_getwithref(vp)) ) {
file_drop(uap->fd);
return(error);
}
error = vn_removexattr(vp, attrname, uap->options, vfs_context_current());
#if CONFIG_FSE
if (error == 0) {
add_fsevent(FSE_XATTR_REMOVED, ctx,
FSE_ARG_VNODE, vp,
FSE_ARG_DONE);
}
#endif
vnode_put(vp);
file_drop(uap->fd);
*retval = 0;
return (error);
}
int
listxattr(proc_t p, struct listxattr_args *uap, user_ssize_t *retval)
{
vnode_t vp;
struct nameidata nd;
vfs_context_t ctx = vfs_context_current();
uio_t auio = NULL;
int spacetype = IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32;
size_t attrsize = 0;
u_int32_t nameiflags;
int error;
char uio_buf[ UIO_SIZEOF(1) ];
if (uap->options & (XATTR_NOSECURITY | XATTR_NODEFAULT))
return (EINVAL);
nameiflags = ((uap->options & XATTR_NOFOLLOW) ? 0 : FOLLOW) | NOTRIGGER;
NDINIT(&nd, LOOKUP, nameiflags, spacetype, uap->path, ctx);
if ((error = namei(&nd))) {
return (error);
}
vp = nd.ni_vp;
nameidone(&nd);
if (uap->namebuf != 0 && uap->bufsize > 0) {
auio = uio_createwithbuffer(1, 0, spacetype,
UIO_READ, &uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, uap->namebuf, uap->bufsize);
}
error = vn_listxattr(vp, auio, &attrsize, uap->options, ctx);
vnode_put(vp);
if (auio) {
*retval = (user_ssize_t)uap->bufsize - uio_resid(auio);
} else {
*retval = (user_ssize_t)attrsize;
}
return (error);
}
int
flistxattr(proc_t p, struct flistxattr_args *uap, user_ssize_t *retval)
{
vnode_t vp;
uio_t auio = NULL;
int spacetype = proc_is64bit(p) ? UIO_USERSPACE64 : UIO_USERSPACE32;
size_t attrsize = 0;
int error;
char uio_buf[ UIO_SIZEOF(1) ];
if (uap->options & (XATTR_NOFOLLOW | XATTR_NOSECURITY | XATTR_NODEFAULT))
return (EINVAL);
if ( (error = file_vnode(uap->fd, &vp)) ) {
return (error);
}
if ( (error = vnode_getwithref(vp)) ) {
file_drop(uap->fd);
return(error);
}
if (uap->namebuf != 0 && uap->bufsize > 0) {
auio = uio_createwithbuffer(1, 0, spacetype,
UIO_READ, &uio_buf[0], sizeof(uio_buf));
uio_addiov(auio, uap->namebuf, uap->bufsize);
}
error = vn_listxattr(vp, auio, &attrsize, uap->options, vfs_context_current());
vnode_put(vp);
file_drop(uap->fd);
if (auio) {
*retval = (user_ssize_t)uap->bufsize - uio_resid(auio);
} else {
*retval = (user_ssize_t)attrsize;
}
return (error);
}
__private_extern__
int
fsgetpath(__unused proc_t p, struct fsgetpath_args *uap, user_ssize_t *retval)
{
vnode_t vp;
struct mount *mp = NULL;
vfs_context_t ctx = vfs_context_current();
fsid_t fsid;
char *realpath;
int bpflags;
int length;
int error;
if ((error = copyin(uap->fsid, (caddr_t)&fsid, sizeof(fsid)))) {
return (error);
}
AUDIT_ARG(value32, fsid.val[0]);
AUDIT_ARG(value64, uap->objid);
if (uap->bufsize > PAGE_SIZE) {
return (EINVAL);
}
MALLOC(realpath, char *, uap->bufsize, M_TEMP, M_WAITOK);
if (realpath == NULL) {
return (ENOMEM);
}
if ((mp = mount_lookupby_volfsid(fsid.val[0], 1)) == NULL) {
error = ENOTSUP;
goto out;
}
if (uap->objid == 2) {
error = VFS_ROOT(mp, &vp, ctx);
} else {
error = VFS_VGET(mp, (ino64_t)uap->objid, &vp, ctx);
}
vfs_unbusy(mp);
if (error) {
goto out;
}
bpflags = vfs_context_suser(ctx) ? BUILDPATH_CHECKACCESS : 0;
error = build_path(vp, realpath, uap->bufsize, &length, bpflags, ctx);
vnode_put(vp);
if (error) {
goto out;
}
AUDIT_ARG(text, realpath);
error = copyout((caddr_t)realpath, uap->buf, length);
*retval = (user_ssize_t)length;
out:
if (realpath) {
FREE(realpath, M_TEMP);
}
return (error);
}
static int
munge_statfs(struct mount *mp, struct vfsstatfs *sfsp,
user_addr_t bufp, int *sizep, boolean_t is_64_bit,
boolean_t partial_copy)
{
int error;
int my_size, copy_size;
if (is_64_bit) {
struct user64_statfs sfs;
my_size = copy_size = sizeof(sfs);
bzero(&sfs, my_size);
sfs.f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
sfs.f_type = mp->mnt_vtable->vfc_typenum;
sfs.f_reserved1 = (short)sfsp->f_fssubtype;
sfs.f_bsize = (user64_long_t)sfsp->f_bsize;
sfs.f_iosize = (user64_long_t)sfsp->f_iosize;
sfs.f_blocks = (user64_long_t)sfsp->f_blocks;
sfs.f_bfree = (user64_long_t)sfsp->f_bfree;
sfs.f_bavail = (user64_long_t)sfsp->f_bavail;
sfs.f_files = (user64_long_t)sfsp->f_files;
sfs.f_ffree = (user64_long_t)sfsp->f_ffree;
sfs.f_fsid = sfsp->f_fsid;
sfs.f_owner = sfsp->f_owner;
strlcpy(&sfs.f_fstypename[0], &sfsp->f_fstypename[0], MFSNAMELEN);
strlcpy(&sfs.f_mntonname[0], &sfsp->f_mntonname[0], MNAMELEN);
strlcpy(&sfs.f_mntfromname[0], &sfsp->f_mntfromname[0], MNAMELEN);
if (partial_copy) {
copy_size -= (sizeof(sfs.f_reserved3) + sizeof(sfs.f_reserved4));
}
error = copyout((caddr_t)&sfs, bufp, copy_size);
}
else {
struct user32_statfs sfs;
my_size = copy_size = sizeof(sfs);
bzero(&sfs, my_size);
sfs.f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
sfs.f_type = mp->mnt_vtable->vfc_typenum;
sfs.f_reserved1 = (short)sfsp->f_fssubtype;
if ((sfsp->f_blocks > INT_MAX)
&& (sfsp->f_blocks != 0xffffffffffffffffULL)
&& (sfsp->f_bfree != 0xffffffffffffffffULL)
&& (sfsp->f_bavail != 0xffffffffffffffffULL)) {
int shift;
for (shift = 0; shift < 32; shift++) {
if ((sfsp->f_blocks >> shift) <= INT_MAX)
break;
if ((sfsp->f_bsize << (shift + 1)) > INT_MAX)
break;
}
#define __SHIFT_OR_CLIP(x, s) ((((x) >> (s)) > INT_MAX) ? INT_MAX : ((x) >> (s)))
sfs.f_blocks = (user32_long_t)__SHIFT_OR_CLIP(sfsp->f_blocks, shift);
sfs.f_bfree = (user32_long_t)__SHIFT_OR_CLIP(sfsp->f_bfree, shift);
sfs.f_bavail = (user32_long_t)__SHIFT_OR_CLIP(sfsp->f_bavail, shift);
#undef __SHIFT_OR_CLIP
sfs.f_bsize = (user32_long_t)(sfsp->f_bsize << shift);
sfs.f_iosize = lmax(sfsp->f_iosize, sfsp->f_bsize);
} else {
sfs.f_bsize = (user32_long_t)sfsp->f_bsize;
sfs.f_iosize = (user32_long_t)sfsp->f_iosize;
sfs.f_blocks = (user32_long_t)sfsp->f_blocks;
sfs.f_bfree = (user32_long_t)sfsp->f_bfree;
sfs.f_bavail = (user32_long_t)sfsp->f_bavail;
}
sfs.f_files = (user32_long_t)sfsp->f_files;
sfs.f_ffree = (user32_long_t)sfsp->f_ffree;
sfs.f_fsid = sfsp->f_fsid;
sfs.f_owner = sfsp->f_owner;
strlcpy(&sfs.f_fstypename[0], &sfsp->f_fstypename[0], MFSNAMELEN);
strlcpy(&sfs.f_mntonname[0], &sfsp->f_mntonname[0], MNAMELEN);
strlcpy(&sfs.f_mntfromname[0], &sfsp->f_mntfromname[0], MNAMELEN);
if (partial_copy) {
copy_size -= (sizeof(sfs.f_reserved3) + sizeof(sfs.f_reserved4));
}
error = copyout((caddr_t)&sfs, bufp, copy_size);
}
if (sizep != NULL) {
*sizep = my_size;
}
return(error);
}
void munge_user64_stat(struct stat *sbp, struct user64_stat *usbp)
{
bzero(usbp, sizeof(*usbp));
usbp->st_dev = sbp->st_dev;
usbp->st_ino = sbp->st_ino;
usbp->st_mode = sbp->st_mode;
usbp->st_nlink = sbp->st_nlink;
usbp->st_uid = sbp->st_uid;
usbp->st_gid = sbp->st_gid;
usbp->st_rdev = sbp->st_rdev;
#ifndef _POSIX_C_SOURCE
usbp->st_atimespec.tv_sec = sbp->st_atimespec.tv_sec;
usbp->st_atimespec.tv_nsec = sbp->st_atimespec.tv_nsec;
usbp->st_mtimespec.tv_sec = sbp->st_mtimespec.tv_sec;
usbp->st_mtimespec.tv_nsec = sbp->st_mtimespec.tv_nsec;
usbp->st_ctimespec.tv_sec = sbp->st_ctimespec.tv_sec;
usbp->st_ctimespec.tv_nsec = sbp->st_ctimespec.tv_nsec;
#else
usbp->st_atime = sbp->st_atime;
usbp->st_atimensec = sbp->st_atimensec;
usbp->st_mtime = sbp->st_mtime;
usbp->st_mtimensec = sbp->st_mtimensec;
usbp->st_ctime = sbp->st_ctime;
usbp->st_ctimensec = sbp->st_ctimensec;
#endif
usbp->st_size = sbp->st_size;
usbp->st_blocks = sbp->st_blocks;
usbp->st_blksize = sbp->st_blksize;
usbp->st_flags = sbp->st_flags;
usbp->st_gen = sbp->st_gen;
usbp->st_lspare = sbp->st_lspare;
usbp->st_qspare[0] = sbp->st_qspare[0];
usbp->st_qspare[1] = sbp->st_qspare[1];
}
void munge_user32_stat(struct stat *sbp, struct user32_stat *usbp)
{
bzero(usbp, sizeof(*usbp));
usbp->st_dev = sbp->st_dev;
usbp->st_ino = sbp->st_ino;
usbp->st_mode = sbp->st_mode;
usbp->st_nlink = sbp->st_nlink;
usbp->st_uid = sbp->st_uid;
usbp->st_gid = sbp->st_gid;
usbp->st_rdev = sbp->st_rdev;
#ifndef _POSIX_C_SOURCE
usbp->st_atimespec.tv_sec = sbp->st_atimespec.tv_sec;
usbp->st_atimespec.tv_nsec = sbp->st_atimespec.tv_nsec;
usbp->st_mtimespec.tv_sec = sbp->st_mtimespec.tv_sec;
usbp->st_mtimespec.tv_nsec = sbp->st_mtimespec.tv_nsec;
usbp->st_ctimespec.tv_sec = sbp->st_ctimespec.tv_sec;
usbp->st_ctimespec.tv_nsec = sbp->st_ctimespec.tv_nsec;
#else
usbp->st_atime = sbp->st_atime;
usbp->st_atimensec = sbp->st_atimensec;
usbp->st_mtime = sbp->st_mtime;
usbp->st_mtimensec = sbp->st_mtimensec;
usbp->st_ctime = sbp->st_ctime;
usbp->st_ctimensec = sbp->st_ctimensec;
#endif
usbp->st_size = sbp->st_size;
usbp->st_blocks = sbp->st_blocks;
usbp->st_blksize = sbp->st_blksize;
usbp->st_flags = sbp->st_flags;
usbp->st_gen = sbp->st_gen;
usbp->st_lspare = sbp->st_lspare;
usbp->st_qspare[0] = sbp->st_qspare[0];
usbp->st_qspare[1] = sbp->st_qspare[1];
}
void munge_user64_stat64(struct stat64 *sbp, struct user64_stat64 *usbp)
{
bzero(usbp, sizeof(*usbp));
usbp->st_dev = sbp->st_dev;
usbp->st_ino = sbp->st_ino;
usbp->st_mode = sbp->st_mode;
usbp->st_nlink = sbp->st_nlink;
usbp->st_uid = sbp->st_uid;
usbp->st_gid = sbp->st_gid;
usbp->st_rdev = sbp->st_rdev;
#ifndef _POSIX_C_SOURCE
usbp->st_atimespec.tv_sec = sbp->st_atimespec.tv_sec;
usbp->st_atimespec.tv_nsec = sbp->st_atimespec.tv_nsec;
usbp->st_mtimespec.tv_sec = sbp->st_mtimespec.tv_sec;
usbp->st_mtimespec.tv_nsec = sbp->st_mtimespec.tv_nsec;
usbp->st_ctimespec.tv_sec = sbp->st_ctimespec.tv_sec;
usbp->st_ctimespec.tv_nsec = sbp->st_ctimespec.tv_nsec;
usbp->st_birthtimespec.tv_sec = sbp->st_birthtimespec.tv_sec;
usbp->st_birthtimespec.tv_nsec = sbp->st_birthtimespec.tv_nsec;
#else
usbp->st_atime = sbp->st_atime;
usbp->st_atimensec = sbp->st_atimensec;
usbp->st_mtime = sbp->st_mtime;
usbp->st_mtimensec = sbp->st_mtimensec;
usbp->st_ctime = sbp->st_ctime;
usbp->st_ctimensec = sbp->st_ctimensec;
usbp->st_birthtime = sbp->st_birthtime;
usbp->st_birthtimensec = sbp->st_birthtimensec;
#endif
usbp->st_size = sbp->st_size;
usbp->st_blocks = sbp->st_blocks;
usbp->st_blksize = sbp->st_blksize;
usbp->st_flags = sbp->st_flags;
usbp->st_gen = sbp->st_gen;
usbp->st_lspare = sbp->st_lspare;
usbp->st_qspare[0] = sbp->st_qspare[0];
usbp->st_qspare[1] = sbp->st_qspare[1];
}
void munge_user32_stat64(struct stat64 *sbp, struct user32_stat64 *usbp)
{
bzero(usbp, sizeof(*usbp));
usbp->st_dev = sbp->st_dev;
usbp->st_ino = sbp->st_ino;
usbp->st_mode = sbp->st_mode;
usbp->st_nlink = sbp->st_nlink;
usbp->st_uid = sbp->st_uid;
usbp->st_gid = sbp->st_gid;
usbp->st_rdev = sbp->st_rdev;
#ifndef _POSIX_C_SOURCE
usbp->st_atimespec.tv_sec = sbp->st_atimespec.tv_sec;
usbp->st_atimespec.tv_nsec = sbp->st_atimespec.tv_nsec;
usbp->st_mtimespec.tv_sec = sbp->st_mtimespec.tv_sec;
usbp->st_mtimespec.tv_nsec = sbp->st_mtimespec.tv_nsec;
usbp->st_ctimespec.tv_sec = sbp->st_ctimespec.tv_sec;
usbp->st_ctimespec.tv_nsec = sbp->st_ctimespec.tv_nsec;
usbp->st_birthtimespec.tv_sec = sbp->st_birthtimespec.tv_sec;
usbp->st_birthtimespec.tv_nsec = sbp->st_birthtimespec.tv_nsec;
#else
usbp->st_atime = sbp->st_atime;
usbp->st_atimensec = sbp->st_atimensec;
usbp->st_mtime = sbp->st_mtime;
usbp->st_mtimensec = sbp->st_mtimensec;
usbp->st_ctime = sbp->st_ctime;
usbp->st_ctimensec = sbp->st_ctimensec;
usbp->st_birthtime = sbp->st_birthtime;
usbp->st_birthtimensec = sbp->st_birthtimensec;
#endif
usbp->st_size = sbp->st_size;
usbp->st_blocks = sbp->st_blocks;
usbp->st_blksize = sbp->st_blksize;
usbp->st_flags = sbp->st_flags;
usbp->st_gen = sbp->st_gen;
usbp->st_lspare = sbp->st_lspare;
usbp->st_qspare[0] = sbp->st_qspare[0];
usbp->st_qspare[1] = sbp->st_qspare[1];
}