int
fuse_vncache_lookup(vnode_t dvp, vnode_t *vpp, struct componentname *cnp)
{
#if M_OSXFUSE_ENABLE_BIG_LOCK
/*
* Make sure that biglock is actually held by the thread calling us before
* trying to unlock it. fuse_vncache_lookup is called by notification
* handlers that do not hold biglock. Trying to unlock it in this case would
* result in a kernel panic.
*/
struct fuse_data *data = fuse_get_mpdata(vnode_mount(dvp));
bool biglock_locked = fuse_biglock_have_lock(data->biglock);
if (biglock_locked) {
fuse_biglock_unlock(data->biglock);
}
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
int ret = cache_lookup(dvp, vpp, cnp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
if (biglock_locked) {
fuse_biglock_lock(data->biglock);
}
#endif
#if FUSE_TRACE_VNCACHE
IOLog("osxfuse: cache lookup ret=%d, dvp=%p, *vpp=%p, %s\n",
ret, dvp, *vpp, cnp->cn_nameptr);
#endif
return ret;
}
static int
fuse_sync_callback(vnode_t vp, void *cargs)
{
int type;
struct fuse_sync_cargs *args;
struct fuse_vnode_data *fvdat;
struct fuse_filehandle *fufh;
struct fuse_data *data;
mount_t mp;
if (!vnode_hasdirtyblks(vp)) {
return VNODE_RETURNED;
}
mp = vnode_mount(vp);
if (fuse_isdeadfs_mp(mp)) {
return VNODE_RETURNED_DONE;
}
data = fuse_get_mpdata(mp);
if (!fuse_implemented(data, (vnode_isdir(vp)) ?
FSESS_NOIMPLBIT(FSYNCDIR) : FSESS_NOIMPLBIT(FSYNC))) {
return VNODE_RETURNED;
}
args = (struct fuse_sync_cargs *)cargs;
fvdat = VTOFUD(vp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(data->biglock);
#endif
cluster_push(vp, 0);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(data->biglock);
#endif
for (type = 0; type < FUFH_MAXTYPE; type++) {
fufh = &(fvdat->fufh[type]);
if (FUFH_IS_VALID(fufh)) {
(void)fuse_internal_fsync_fh(vp, args->context, fufh,
FUSE_OP_FOREGROUNDED);
}
}
/*
* In general:
*
* - can use vnode_isinuse() if the need be
* - vnode and UBC are in lock-step
* - note that umount will call ubc_sync_range()
*/
return VNODE_RETURNED;
}
static errno_t
fuse_vfsop_sync(mount_t mp, int waitfor, vfs_context_t context)
{
uint64_t mntflags;
struct fuse_sync_cargs args;
int allerror = 0;
fuse_trace_printf_vfsop();
mntflags = vfs_flags(mp);
if (fuse_isdeadfs_mp(mp)) {
return 0;
}
if (vfs_isupdate(mp)) {
return 0;
}
if (vfs_isrdonly(mp)) {
return EROFS; // should panic!?
}
/*
* Write back each (modified) fuse node.
*/
args.context = context;
args.waitfor = waitfor;
args.error = 0;
#if M_FUSE4X_ENABLE_BIGLOCK
struct fuse_data *data = fuse_get_mpdata(mp);
fuse_biglock_unlock(data->biglock);
#endif
vnode_iterate(mp, 0, fuse_sync_callback, (void *)&args);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_lock(data->biglock);
#endif
if (args.error) {
allerror = args.error;
}
/*
* For other types of stale file system information, such as:
*
* - fs control info
* - quota information
* - modified superblock
*/
return allerror;
}
__inline__
int
fuse_vncache_lookup(vnode_t dvp, vnode_t *vpp, struct componentname *cnp)
{
#if M_OSXFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_OSXFUSE_ENABLE_HUGE_LOCK
struct fuse_data *data = fuse_get_mpdata(vnode_mount(dvp));
fuse_biglock_unlock(data->biglock);
#endif
int ret = cache_lookup(dvp, vpp, cnp);
#if M_OSXFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_OSXFUSE_ENABLE_HUGE_LOCK
fuse_biglock_lock(data->biglock);
#endif
#if FUSE_TRACE_VNCACHE
IOLog("OSXFUSE: cache lookup ret=%d, dvp=%p, *vpp=%p, %s\n",
ret, dvp, *vpp, cnp->cn_nameptr);
#endif
return ret;
}
void
fuse_vncache_purge(vnode_t vp)
{
#if FUSE_TRACE_VNCACHE
IOLog("osxfuse: cache purge vp=%p\n", vp);
#endif
#if M_OSXFUSE_ENABLE_BIG_LOCK
struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
bool biglock_locked = fuse_biglock_have_lock(data->biglock);
if (biglock_locked) {
fuse_biglock_unlock(data->biglock);
}
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
cache_purge(vp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
if (biglock_locked) {
fuse_biglock_lock(data->biglock);
}
#endif
}
void
fuse_vncache_enter(vnode_t dvp, vnode_t vp, struct componentname *cnp)
{
#if FUSE_TRACE_VNCACHE
IOLog("osxfuse: cache enter dvp=%p, vp=%p, %s\n", dvp, vp, cnp->cn_nameptr);
#endif
#if M_OSXFUSE_ENABLE_BIG_LOCK
struct fuse_data *data = fuse_get_mpdata(vnode_mount(dvp));
bool biglock_locked = fuse_biglock_have_lock(data->biglock);
if (biglock_locked) {
fuse_biglock_unlock(data->biglock);
}
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
cache_enter(dvp, vp, cnp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
if (biglock_locked) {
fuse_biglock_lock(data->biglock);
}
#endif
}
static errno_t
fuse_vfsop_unmount(mount_t mp, int mntflags, vfs_context_t context)
{
int err = 0;
int flags = 0;
fuse_device_t fdev;
struct fuse_data *data;
struct fuse_dispatcher fdi;
vnode_t fuse_rootvp = NULLVP;
fuse_trace_printf_vfsop();
if (mntflags & MNT_FORCE) {
flags |= FORCECLOSE;
}
data = fuse_get_mpdata(mp);
if (!data) {
panic("fuse4x: no mount private data in vfs_unmount");
}
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_lock(data->biglock);
#endif
fdev = data->fdev;
if (fdata_dead_get(data)) {
/*
* If the file system daemon is dead, it's pointless to try to do
* any unmount-time operations that go out to user space. Therefore,
* we pretend that this is a force unmount. However, this isn't of much
* use. That's because if any non-root vnode is in use, the vflush()
* that the kernel does before calling our VFS_UNMOUNT will fail
* if the original unmount wasn't forcible already. That earlier
* vflush is called with SKIPROOT though, so it wouldn't bail out
* on the root vnode being in use.
*
* If we want, we could set FORCECLOSE here so that a non-forced
* unmount will be "upgraded" to a forced unmount if the root vnode
* is busy (you are cd'd to the mount point, for example). It's not
* quite pure to do that though.
*
* flags |= FORCECLOSE;
* log("fuse4x: forcing unmount on a dead file system\n");
*/
} else if (!(data->dataflags & FSESS_INITED)) {
flags |= FORCECLOSE;
log("fuse4x: forcing unmount on not-yet-alive file system\n");
fdata_set_dead(data);
}
fuse_rootvp = data->rootvp;
fuse_trace_printf("%s: Calling vflush(mp, fuse_rootvp, flags=0x%X);\n", __FUNCTION__, flags);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
err = vflush(mp, fuse_rootvp, flags);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_lock(data->biglock);
#endif
fuse_trace_printf("%s: Done.\n", __FUNCTION__);
if (err) {
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
return err;
}
if (vnode_isinuse(fuse_rootvp, 1) && !(flags & FORCECLOSE)) {
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
return EBUSY;
}
if (fdata_dead_get(data)) {
goto alreadydead;
}
fdisp_init(&fdi, 0 /* no data to send along */);
fdisp_make(&fdi, FUSE_DESTROY, mp, FUSE_ROOT_ID, context);
fuse_trace_printf("%s: Waiting for reply from FUSE_DESTROY.\n", __FUNCTION__);
err = fdisp_wait_answ(&fdi);
fuse_trace_printf("%s: Reply received.\n", __FUNCTION__);
if (!err) {
fuse_ticket_drop(fdi.tick);
}
/*
* Note that dounmount() signals a VQ_UNMOUNT VFS event.
*/
fdata_set_dead(data);
alreadydead:
fuse_trace_printf("%s: Calling vnode_rele(fuse_rootp);\n", __FUNCTION__);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
vnode_rele(fuse_rootvp); /* We got this reference in fuse_vfsop_mount(). */
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_lock(data->biglock);
#endif
fuse_trace_printf("%s: Done.\n", __FUNCTION__);
data->rootvp = NULLVP;
fuse_trace_printf("%s: Calling vflush(mp, NULLVP, FORCECLOSE);\n", __FUNCTION__);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
(void)vflush(mp, NULLVP, FORCECLOSE);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_lock(data->biglock);
#endif
fuse_trace_printf("%s: Done.\n", __FUNCTION__);
fuse_lck_mtx_lock(fdev->mtx);
vfs_setfsprivate(mp, NULL);
data->dataflags &= ~FSESS_MOUNTED;
OSAddAtomic(-1, (SInt32 *)&fuse_mount_count);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
if (!(data->dataflags & FSESS_OPENED)) {
/* fdev->data was left for us to clean up */
fuse_device_close_final(fdev);
/* fdev->data is gone now */
}
fuse_lck_mtx_unlock(fdev->mtx);
return 0;
}
static errno_t
fuse_vfsop_mount(mount_t mp, __unused vnode_t devvp, user_addr_t udata,
vfs_context_t context)
{
int err = 0;
int mntopts = 0;
bool mounted = false;
uint32_t max_read = ~0;
size_t len;
fuse_device_t fdev = NULL;
struct fuse_data *data = NULL;
fuse_mount_args fusefs_args;
struct vfsstatfs *vfsstatfsp = vfs_statfs(mp);
#if M_FUSE4X_ENABLE_BIGLOCK
lck_mtx_t *biglock;
#endif
fuse_trace_printf_vfsop();
if (vfs_isupdate(mp)) {
return ENOTSUP;
}
err = copyin(udata, &fusefs_args, sizeof(fusefs_args));
if (err) {
return EINVAL;
}
/*
* Interesting flags that we can receive from mount or may want to
* otherwise forcibly set include:
*
* MNT_ASYNC
* MNT_AUTOMOUNTED
* MNT_DEFWRITE
* MNT_DONTBROWSE
* MNT_IGNORE_OWNERSHIP
* MNT_JOURNALED
* MNT_NODEV
* MNT_NOEXEC
* MNT_NOSUID
* MNT_NOUSERXATTR
* MNT_RDONLY
* MNT_SYNCHRONOUS
* MNT_UNION
*/
err = ENOTSUP;
#if M_FUSE4X_ENABLE_UNSUPPORTED
vfs_setlocklocal(mp);
#endif /* M_FUSE4X_ENABLE_UNSUPPORTED */
/** Option Processing. **/
if (*fusefs_args.fstypename) {
size_t typenamelen = strlen(fusefs_args.fstypename);
if (typenamelen > FUSE_FSTYPENAME_MAXLEN) {
return EINVAL;
}
snprintf(vfsstatfsp->f_fstypename, MFSTYPENAMELEN, "%s%s",
FUSE_FSTYPENAME_PREFIX, fusefs_args.fstypename);
}
if (!*fusefs_args.fsname)
return EINVAL;
if ((fusefs_args.daemon_timeout > FUSE_MAX_DAEMON_TIMEOUT) ||
(fusefs_args.daemon_timeout < FUSE_MIN_DAEMON_TIMEOUT)) {
return EINVAL;
}
if ((fusefs_args.init_timeout > FUSE_MAX_INIT_TIMEOUT) ||
(fusefs_args.init_timeout < FUSE_MIN_INIT_TIMEOUT)) {
return EINVAL;
}
if (fusefs_args.altflags & FUSE_MOPT_SPARSE) {
mntopts |= FSESS_SPARSE;
}
if (fusefs_args.altflags & FUSE_MOPT_AUTO_CACHE) {
mntopts |= FSESS_AUTO_CACHE;
}
if (fusefs_args.altflags & FUSE_MOPT_AUTO_XATTR) {
if (fusefs_args.altflags & FUSE_MOPT_NATIVE_XATTR) {
return EINVAL;
}
mntopts |= FSESS_AUTO_XATTR;
} else if (fusefs_args.altflags & FUSE_MOPT_NATIVE_XATTR) {
mntopts |= FSESS_NATIVE_XATTR;
}
if (fusefs_args.altflags & FUSE_MOPT_JAIL_SYMLINKS) {
mntopts |= FSESS_JAIL_SYMLINKS;
}
/*
* Note that unlike Linux, which keeps allow_root in user-space and
* passes allow_other in that case to the kernel, we let allow_root
* reach the kernel. The 'if' ordering is important here.
*/
if (fusefs_args.altflags & FUSE_MOPT_ALLOW_ROOT) {
int is_member = 0;
if ((kauth_cred_ismember_gid(kauth_cred_get(), fuse_admin_group, &is_member) != 0) || !is_member) {
log("fuse4x: caller is not a member of fuse4x admin group. "
"Either add user (id=%d) to group (id=%d), "
"or set correct '" SYSCTL_FUSE4X_TUNABLES_ADMIN "' sysctl value.\n",
kauth_cred_getuid(kauth_cred_get()), fuse_admin_group);
return EPERM;
}
mntopts |= FSESS_ALLOW_ROOT;
} else if (fusefs_args.altflags & FUSE_MOPT_ALLOW_OTHER) {
if (!fuse_allow_other && !fuse_vfs_context_issuser(context)) {
int is_member = 0;
if ((kauth_cred_ismember_gid(kauth_cred_get(), fuse_admin_group, &is_member) != 0) || !is_member) {
log("fuse4x: caller is not a member of fuse4x admin group. "
"Either add user (id=%d) to group (id=%d), "
"or set correct '" SYSCTL_FUSE4X_TUNABLES_ADMIN "' sysctl value.\n",
kauth_cred_getuid(kauth_cred_get()), fuse_admin_group);
return EPERM;
}
}
mntopts |= FSESS_ALLOW_OTHER;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_APPLEDOUBLE) {
mntopts |= FSESS_NO_APPLEDOUBLE;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_APPLEXATTR) {
mntopts |= FSESS_NO_APPLEXATTR;
}
if ((fusefs_args.altflags & FUSE_MOPT_FSID) && (fusefs_args.fsid != 0)) {
fsid_t fsid;
mount_t other_mp;
uint32_t target_dev;
target_dev = FUSE_MAKEDEV(FUSE_CUSTOM_FSID_DEVICE_MAJOR,
fusefs_args.fsid);
fsid.val[0] = target_dev;
fsid.val[1] = FUSE_CUSTOM_FSID_VAL1;
other_mp = vfs_getvfs(&fsid);
if (other_mp != NULL) {
return EPERM;
}
vfsstatfsp->f_fsid.val[0] = target_dev;
vfsstatfsp->f_fsid.val[1] = FUSE_CUSTOM_FSID_VAL1;
} else {
vfs_getnewfsid(mp);
}
if (fusefs_args.altflags & FUSE_MOPT_NO_ATTRCACHE) {
mntopts |= FSESS_NO_ATTRCACHE;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_READAHEAD) {
mntopts |= FSESS_NO_READAHEAD;
}
if (fusefs_args.altflags & (FUSE_MOPT_NO_UBC | FUSE_MOPT_DIRECT_IO)) {
mntopts |= FSESS_NO_UBC;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_VNCACHE) {
mntopts |= FSESS_NO_VNCACHE;
}
if (fusefs_args.altflags & FUSE_MOPT_NEGATIVE_VNCACHE) {
if (mntopts & FSESS_NO_VNCACHE) {
return EINVAL;
}
mntopts |= FSESS_NEGATIVE_VNCACHE;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_SYNCWRITES) {
/* Cannot mix 'nosyncwrites' with 'noubc' or 'noreadahead'. */
if (mntopts & (FSESS_NO_READAHEAD | FSESS_NO_UBC)) {
log("fuse4x: cannot mix 'nosyncwrites' with 'noubc' or 'noreadahead'\n");
return EINVAL;
}
mntopts |= FSESS_NO_SYNCWRITES;
vfs_clearflags(mp, MNT_SYNCHRONOUS);
vfs_setflags(mp, MNT_ASYNC);
/* We check for this only if we have nosyncwrites in the first place. */
if (fusefs_args.altflags & FUSE_MOPT_NO_SYNCONCLOSE) {
mntopts |= FSESS_NO_SYNCONCLOSE;
}
} else {
vfs_clearflags(mp, MNT_ASYNC);
vfs_setflags(mp, MNT_SYNCHRONOUS);
}
if (mntopts & FSESS_NO_UBC) {
/* If no buffer cache, disallow exec from file system. */
vfs_setflags(mp, MNT_NOEXEC);
}
vfs_setauthopaque(mp);
vfs_setauthopaqueaccess(mp);
if ((fusefs_args.altflags & FUSE_MOPT_DEFAULT_PERMISSIONS) &&
(fusefs_args.altflags & FUSE_MOPT_DEFER_PERMISSIONS)) {
return EINVAL;
}
if (fusefs_args.altflags & FUSE_MOPT_DEFAULT_PERMISSIONS) {
mntopts |= FSESS_DEFAULT_PERMISSIONS;
vfs_clearauthopaque(mp);
}
if (fusefs_args.altflags & FUSE_MOPT_DEFER_PERMISSIONS) {
mntopts |= FSESS_DEFER_PERMISSIONS;
}
if (fusefs_args.altflags & FUSE_MOPT_EXTENDED_SECURITY) {
mntopts |= FSESS_EXTENDED_SECURITY;
vfs_setextendedsecurity(mp);
}
if (fusefs_args.altflags & FUSE_MOPT_LOCALVOL) {
vfs_setflags(mp, MNT_LOCAL);
}
/* done checking incoming option bits */
err = 0;
vfs_setfsprivate(mp, NULL);
fdev = fuse_device_get(fusefs_args.rdev);
if (!fdev) {
log("fuse4x: invalid device file (number=%d)\n", fusefs_args.rdev);
return EINVAL;
}
fuse_lck_mtx_lock(fdev->mtx);
data = fdev->data;
if (!data) {
fuse_lck_mtx_unlock(fdev->mtx);
return ENXIO;
}
#if M_FUSE4X_ENABLE_BIGLOCK
biglock = data->biglock;
fuse_biglock_lock(biglock);
#endif
if (data->dataflags & FSESS_MOUNTED) {
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(biglock);
#endif
fuse_lck_mtx_unlock(fdev->mtx);
return EALREADY;
}
if (!(data->dataflags & FSESS_OPENED)) {
fuse_lck_mtx_unlock(fdev->mtx);
err = ENXIO;
goto out;
}
data->dataflags |= FSESS_MOUNTED;
OSAddAtomic(1, (SInt32 *)&fuse_mount_count);
mounted = true;
if (fdata_dead_get(data)) {
fuse_lck_mtx_unlock(fdev->mtx);
err = ENOTCONN;
goto out;
}
if (!data->daemoncred) {
panic("fuse4x: daemon found but identity unknown");
}
if (fuse_vfs_context_issuser(context) &&
kauth_cred_getuid(vfs_context_ucred(context)) != kauth_cred_getuid(data->daemoncred)) {
fuse_lck_mtx_unlock(fdev->mtx);
err = EPERM;
log("fuse4x: fuse daemon running by user_id=%d does not have privileges to mount on directory %s owned by user_id=%d\n",
kauth_cred_getuid(data->daemoncred), vfsstatfsp->f_mntonname, kauth_cred_getuid(vfs_context_ucred(context)));
goto out;
}
data->mp = mp;
data->fdev = fdev;
data->dataflags |= mntopts;
data->daemon_timeout.tv_sec = fusefs_args.daemon_timeout;
data->daemon_timeout.tv_nsec = 0;
if (data->daemon_timeout.tv_sec) {
data->daemon_timeout_p = &(data->daemon_timeout);
} else {
data->daemon_timeout_p = NULL;
}
data->init_timeout.tv_sec = fusefs_args.init_timeout;
data->init_timeout.tv_nsec = 0;
data->max_read = max_read;
data->fssubtype = fusefs_args.fssubtype;
data->mountaltflags = fusefs_args.altflags;
data->noimplflags = (uint64_t)0;
data->blocksize = fuse_round_size(fusefs_args.blocksize,
FUSE_MIN_BLOCKSIZE, FUSE_MAX_BLOCKSIZE);
data->iosize = fuse_round_size(fusefs_args.iosize,
FUSE_MIN_IOSIZE, FUSE_MAX_IOSIZE);
if (data->iosize < data->blocksize) {
data->iosize = data->blocksize;
}
data->userkernel_bufsize = FUSE_DEFAULT_USERKERNEL_BUFSIZE;
copystr(fusefs_args.fsname, vfsstatfsp->f_mntfromname,
MNAMELEN - 1, &len);
bzero(vfsstatfsp->f_mntfromname + len, MNAMELEN - len);
copystr(fusefs_args.volname, data->volname, MAXPATHLEN - 1, &len);
bzero(data->volname + len, MAXPATHLEN - len);
/* previous location of vfs_setioattr() */
vfs_setfsprivate(mp, data);
fuse_lck_mtx_unlock(fdev->mtx);
/* Send a handshake message to the daemon. */
fuse_send_init(data, context);
struct vfs_attr vfs_attr;
VFSATTR_INIT(&vfs_attr);
// Our vfs_getattr() doesn't look at most *_IS_ACTIVE()'s
err = fuse_vfsop_getattr(mp, &vfs_attr, context);
if (!err) {
vfsstatfsp->f_bsize = vfs_attr.f_bsize;
vfsstatfsp->f_iosize = vfs_attr.f_iosize;
vfsstatfsp->f_blocks = vfs_attr.f_blocks;
vfsstatfsp->f_bfree = vfs_attr.f_bfree;
vfsstatfsp->f_bavail = vfs_attr.f_bavail;
vfsstatfsp->f_bused = vfs_attr.f_bused;
vfsstatfsp->f_files = vfs_attr.f_files;
vfsstatfsp->f_ffree = vfs_attr.f_ffree;
// vfsstatfsp->f_fsid already handled above
vfsstatfsp->f_owner = kauth_cred_getuid(data->daemoncred);
vfsstatfsp->f_flags = vfs_flags(mp);
// vfsstatfsp->f_fstypename already handled above
// vfsstatfsp->f_mntonname handled elsewhere
// vfsstatfsp->f_mnfromname already handled above
vfsstatfsp->f_fssubtype = data->fssubtype;
}
if (fusefs_args.altflags & FUSE_MOPT_BLOCKSIZE) {
vfsstatfsp->f_bsize = data->blocksize;
} else {
//data->blocksize = vfsstatfsp->f_bsize;
}
if (fusefs_args.altflags & FUSE_MOPT_IOSIZE) {
vfsstatfsp->f_iosize = data->iosize;
} else {
//data->iosize = (uint32_t)vfsstatfsp->f_iosize;
vfsstatfsp->f_iosize = data->iosize;
}
out:
if (err) {
vfs_setfsprivate(mp, NULL);
fuse_lck_mtx_lock(fdev->mtx);
data = fdev->data; /* again */
if (mounted) {
OSAddAtomic(-1, (SInt32 *)&fuse_mount_count);
}
if (data) {
data->dataflags &= ~FSESS_MOUNTED;
if (!(data->dataflags & FSESS_OPENED)) {
#if M_FUSE4X_ENABLE_BIGLOCK
assert(biglock == data->biglock);
fuse_biglock_unlock(biglock);
#endif
fuse_device_close_final(fdev);
/* data is gone now */
}
}
fuse_lck_mtx_unlock(fdev->mtx);
} else {
vnode_t fuse_rootvp = NULLVP;
err = fuse_vfsop_root(mp, &fuse_rootvp, context);
if (err) {
goto out; /* go back and follow error path */
}
err = vnode_ref(fuse_rootvp);
(void)vnode_put(fuse_rootvp);
if (err) {
goto out; /* go back and follow error path */
} else {
struct vfsioattr ioattr;
vfs_ioattr(mp, &ioattr);
ioattr.io_devblocksize = data->blocksize;
vfs_setioattr(mp, &ioattr);
}
}
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_lck_mtx_lock(fdev->mtx);
data = fdev->data; /* ...and again */
if(data) {
assert(data->biglock == biglock);
fuse_biglock_unlock(biglock);
}
fuse_lck_mtx_unlock(fdev->mtx);
#endif
return err;
}
errno_t
FSNodeGetOrCreateFileVNodeByID(vnode_t *vnPtr,
uint32_t flags,
struct fuse_abi_data *feo,
mount_t mp,
vnode_t dvp,
vfs_context_t context,
uint32_t *oflags)
{
int err;
vnode_t vn = NULLVP;
HNodeRef hn = NULL;
struct fuse_vnode_data *fvdat = NULL;
struct fuse_data *mntdata = NULL;
fuse_device_t dummy_device;
struct fuse_abi_data fa;
enum vtype vtyp;
fuse_abi_data_init(&fa, feo->fad_version, fuse_entry_out_get_attr(feo));
vtyp = IFTOVT(fuse_attr_get_mode(&fa));
if ((vtyp >= VBAD) || (vtyp == VNON)) {
return EINVAL;
}
int markroot = (flags & FN_IS_ROOT) ? 1 : 0;
uint64_t size = (flags & FN_IS_ROOT) ? 0 : fuse_attr_get_size(&fa);
uint32_t rdev = (flags & FN_IS_ROOT) ? 0 : fuse_attr_get_rdev(&fa);
uint64_t generation = fuse_entry_out_get_generation(feo);
mntdata = fuse_get_mpdata(mp);
dummy_device = mntdata->fdev;
err = HNodeLookupCreatingIfNecessary(dummy_device, fuse_entry_out_get_nodeid(feo),
0 /* fork index */, &hn, &vn);
if ((err == 0) && (vn == NULL)) {
struct vnode_fsparam params;
fvdat = (struct fuse_vnode_data *)FSNodeGenericFromHNode(hn);
if (!fvdat->fInitialised) {
fvdat->fInitialised = true;
/* self */
fvdat->vp = NULLVP; /* hold on */
fvdat->nodeid = fuse_entry_out_get_nodeid(feo);
fvdat->generation = generation;
/* parent */
fvdat->parentvp = dvp;
if (dvp) {
fvdat->parent_nodeid = VTOI(dvp);
} else {
fvdat->parent_nodeid = 0;
}
/* I/O */
{
int k;
for (k = 0; k < FUFH_MAXTYPE; k++) {
FUFH_USE_RESET(&(fvdat->fufh[k]));
}
}
/* flags */
fvdat->flag = flags;
fvdat->c_flag = 0;
/* meta */
/* XXX: truncation */
fvdat->entry_valid.tv_sec = (time_t)fuse_entry_out_get_entry_valid(feo);
fvdat->entry_valid.tv_nsec = fuse_entry_out_get_entry_valid_nsec(feo);
/* XXX: truncation */
fvdat->attr_valid.tv_sec = 0;
fvdat->attr_valid.tv_nsec = 0;
/* XXX: truncation */
fvdat->modify_time.tv_sec = (time_t)fuse_attr_get_mtime(&fa);
fvdat->modify_time.tv_nsec = fuse_attr_get_mtimensec(&fa);
fvdat->filesize = size;
fvdat->nlookup = 0;
fvdat->vtype = vtyp;
/* locking */
fvdat->createlock = lck_mtx_alloc_init(fuse_lock_group,
fuse_lock_attr);
fvdat->creator = current_thread();
#if M_OSXFUSE_ENABLE_TSLOCKING
fvdat->nodelock = lck_rw_alloc_init(fuse_lock_group,
fuse_lock_attr);
fvdat->nodelockowner = NULL;
fvdat->truncatelock = lck_rw_alloc_init(fuse_lock_group,
fuse_lock_attr);
#endif
}
if (err == 0) {
params.vnfs_mp = mp;
params.vnfs_vtype = vtyp;
params.vnfs_str = NULL;
params.vnfs_dvp = dvp; /* NULLVP for the root vnode */
params.vnfs_fsnode = hn;
#if M_OSXFUSE_ENABLE_SPECFS
if ((vtyp == VBLK) || (vtyp == VCHR)) {
params.vnfs_vops = fuse_spec_operations;
params.vnfs_rdev = (dev_t)rdev;
#else
if (0) {
#endif
#if M_OSXFUSE_ENABLE_FIFOFS
} else if (vtyp == VFIFO) {
params.vnfs_vops = fuse_fifo_operations;
params.vnfs_rdev = 0;
(void)rdev;
#else
} else if (0) {
#endif
} else {
params.vnfs_vops = fuse_vnode_operations;
params.vnfs_rdev = 0;
(void)rdev;
}
params.vnfs_marksystem = 0;
params.vnfs_cnp = NULL;
params.vnfs_flags = VNFS_NOCACHE | VNFS_CANTCACHE;
params.vnfs_filesize = size;
params.vnfs_markroot = markroot;
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(mntdata->biglock);
#endif
err = vnode_create(VNCREATE_FLAVOR, (uint32_t)sizeof(params),
¶ms, &vn);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(mntdata->biglock);
#endif
}
if (err == 0) {
if (markroot) {
fvdat->parentvp = vn;
} else {
fvdat->parentvp = dvp;
}
if (oflags) {
*oflags |= MAKEENTRY;
}
/* Need VT_OSXFUSE from xnu */
vnode_settag(vn, VT_OTHER);
cache_attrs(vn, fuse_entry_out, feo);
HNodeAttachVNodeSucceeded(hn, 0 /* forkIndex */, vn);
FUSE_OSAddAtomic(1, (SInt32 *)&fuse_vnodes_current);
} else {
if (HNodeAttachVNodeFailed(hn, 0 /* forkIndex */)) {
FSNodeScrub(fvdat);
HNodeScrubDone(hn);
}
}
}
if (err == 0) {
if (vnode_vtype(vn) != vtyp) {
IOLog("osxfuse: vnode changed type behind us (old=%d, new=%d)\n",
vnode_vtype(vn), vtyp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(mntdata->biglock);
#endif
fuse_internal_vnode_disappear(vn, context, REVOKE_SOFT);
vnode_put(vn);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(mntdata->biglock);
#endif
err = EIO;
} else if (VTOFUD(vn)->generation != generation) {
IOLog("osxfuse: vnode changed generation\n");
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(mntdata->biglock);
#endif
fuse_internal_vnode_disappear(vn, context, REVOKE_SOFT);
vnode_put(vn);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(mntdata->biglock);
#endif
err = ESTALE;
}
}
if (err == 0) {
*vnPtr = vn;
}
/* assert((err == 0) == (*vnPtr != NULL); */
return err;
}
int
fuse_vget_i(vnode_t *vpp,
uint32_t flags,
struct fuse_abi_data *feo,
struct componentname *cnp,
vnode_t dvp,
mount_t mp,
vfs_context_t context)
{
int err = 0;
if (!feo) {
return EINVAL;
}
err = FSNodeGetOrCreateFileVNodeByID(vpp, flags, feo, mp, dvp,
context, NULL);
if (err) {
return err;
}
if (!fuse_isnovncache_mp(mp) && (cnp->cn_flags & MAKEENTRY)) {
fuse_vncache_enter(dvp, *vpp, cnp);
}
/* found: */
VTOFUD(*vpp)->nlookup++;
return 0;
}
/*
* Because of the vagaries of how a filehandle can be used, we try not to
* be too smart in here (we try to be smart elsewhere). It is required that
* you come in here only if you really do not have the said filehandle--else
* we panic.
*/
int
fuse_filehandle_get(vnode_t vp,
vfs_context_t context,
fufh_type_t fufh_type,
int mode)
{
struct fuse_dispatcher fdi;
struct fuse_abi_data foi;
struct fuse_abi_data foo;
struct fuse_filehandle *fufh;
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
int err = 0;
int oflags = 0;
int op = FUSE_OPEN;
fuse_trace_printf("fuse_filehandle_get(vp=%p, fufh_type=%d, mode=%x)\n",
vp, fufh_type, mode);
fufh = &(fvdat->fufh[fufh_type]);
if (FUFH_IS_VALID(fufh)) {
panic("osxfuse: filehandle_get called despite valid fufh (type=%d)",
fufh_type);
/* NOTREACHED */
}
/*
* Note that this means we are effectively FILTERING OUT open() flags.
*/
(void)mode;
oflags = fuse_filehandle_xlate_to_oflags(fufh_type);
if (vnode_isdir(vp)) {
op = FUSE_OPENDIR;
if (fufh_type != FUFH_RDONLY) {
IOLog("osxfuse: non-rdonly fufh requested for directory\n");
fufh_type = FUFH_RDONLY;
}
}
if (vnode_islnk(vp) && (mode & O_SYMLINK)) {
oflags |= O_SYMLINK;
}
if ((mode & O_TRUNC) && (data->dataflags & FSESS_ATOMIC_O_TRUNC)) {
oflags |= O_TRUNC;
}
fdisp_init_abi(&fdi, fuse_open_in, data);
fdisp_make_vp(&fdi, op, vp, context);
fuse_abi_data_init(&foi, DATOI(data), fdi.indata);
fuse_open_in_set_flags(&foi, oflags);
FUSE_OSAddAtomic(1, (SInt32 *)&fuse_fh_upcall_count);
err = fdisp_wait_answ(&fdi);
if (err) {
#if M_OSXFUSE_ENABLE_UNSUPPORTED
const char *vname = vnode_getname(vp);
#endif /* M_OSXFUSE_ENABLE_UNSUPPORTED */
if (err == ENOENT) {
/*
* See comment in fuse_vnop_reclaim().
*/
cache_purge(vp);
}
#if M_OSXFUSE_ENABLE_UNSUPPORTED
IOLog("osxfuse: filehandle_get: failed for %s "
"(type=%d, err=%d, caller=%p)\n",
(vname) ? vname : "?", fufh_type, err,
__builtin_return_address(0));
if (vname) {
vnode_putname(vname);
}
#endif /* M_OSXFUSE_ENABLE_UNSUPPORTED */
if (err == ENOENT) {
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(data->biglock);
#endif
fuse_internal_vnode_disappear(vp, context, REVOKE_SOFT);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(data->biglock);
#endif
}
return err;
}
FUSE_OSAddAtomic(1, (SInt32 *)&fuse_fh_current);
fuse_abi_data_init(&foo, DATOI(data), fdi.answ);
fufh->fh_id = fuse_open_out_get_fh(&foo);
fufh->open_count = 1;
fufh->open_flags = oflags;
fufh->fuse_open_flags = fuse_open_out_get_open_flags(&foo);
fufh->aux_count = 0;
fuse_ticket_release(fdi.tick);
return 0;
}
__private_extern__
int
fuse_internal_remove(vnode_t dvp,
vnode_t vp,
struct componentname *cnp,
enum fuse_opcode op,
vfs_context_t context)
{
struct fuse_dispatcher fdi;
struct vnode_attr *vap = VTOVA(vp);
int need_invalidate = 0;
uint64_t target_nlink = 0;
mount_t mp = vnode_mount(vp);
int err = 0;
fdisp_init(&fdi, cnp->cn_namelen + 1);
fdisp_make_vp(&fdi, op, dvp, context);
memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
((char *)fdi.indata)[cnp->cn_namelen] = '\0';
if ((vap->va_nlink > 1) && vnode_isreg(vp)) {
need_invalidate = 1;
target_nlink = vap->va_nlink;
}
if (!(err = fdisp_wait_answ(&fdi))) {
fuse_ticket_drop(fdi.tick);
}
fuse_invalidate_attr(dvp);
fuse_invalidate_attr(vp);
/*
* XXX: M_MACFUSE_INVALIDATE_CACHED_VATTRS_UPON_UNLINK
*
* Consider the case where vap->va_nlink > 1 for the entity being
* removed. In our world, other in-memory vnodes that share a link
* count each with this one may not know right way that this one just
* got deleted. We should let them know, say, through a vnode_iterate()
* here and a callback that does fuse_invalidate_attr(vp) on each
* relevant vnode.
*/
if (need_invalidate && !err) {
if (!vfs_busy(mp, LK_NOWAIT)) {
#if M_MACFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_MACFUSE_ENABLE_HUGE_LOCK
struct fuse_data *data = fuse_get_mpdata(mp);
fuse_biglock_unlock(data->biglock);
#endif
vnode_iterate(mp, 0, fuse_internal_remove_callback,
(void *)&target_nlink);
#if M_MACFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_MACFUSE_ENABLE_HUGE_LOCK
fuse_biglock_lock(data->biglock);
#endif
vfs_unbusy(mp);
} else {
IOLog("MacFUSE: skipping link count fixup upon remove\n");
}
}
return err;
}
__private_extern__
int
fuse_internal_access(vnode_t vp,
int action,
vfs_context_t context,
struct fuse_access_param *facp)
{
int err = 0;
int default_error = 0;
uint32_t mask = 0;
int dataflags;
mount_t mp;
struct fuse_dispatcher fdi;
struct fuse_access_in *fai;
struct fuse_data *data;
fuse_trace_printf_func();
mp = vnode_mount(vp);
data = fuse_get_mpdata(mp);
dataflags = data->dataflags;
/* Allow for now; let checks be handled inline later. */
if (fuse_isdeferpermissions_mp(mp)) {
return 0;
}
if (facp->facc_flags & FACCESS_FROM_VNOP) {
default_error = ENOTSUP;
}
/*
* (action & KAUTH_VNODE_GENERIC_WRITE_BITS) on a read-only file system
* would have been handled by higher layers.
*/
if (!fuse_implemented(data, FSESS_NOIMPLBIT(ACCESS))) {
return default_error;
}
/* Unless explicitly permitted, deny everyone except the fs owner. */
if (!vnode_isvroot(vp) && !(facp->facc_flags & FACCESS_NOCHECKSPY)) {
if (!(dataflags & FSESS_ALLOW_OTHER)) {
int denied = fuse_match_cred(data->daemoncred,
vfs_context_ucred(context));
if (denied) {
return EPERM;
}
}
facp->facc_flags |= FACCESS_NOCHECKSPY;
}
if (!(facp->facc_flags & FACCESS_DO_ACCESS)) {
return default_error;
}
if (vnode_isdir(vp)) {
if (action & (KAUTH_VNODE_LIST_DIRECTORY |
KAUTH_VNODE_READ_EXTATTRIBUTES)) {
mask |= R_OK;
}
if (action & (KAUTH_VNODE_ADD_FILE |
KAUTH_VNODE_ADD_SUBDIRECTORY |
KAUTH_VNODE_DELETE_CHILD)) {
mask |= W_OK;
}
if (action & KAUTH_VNODE_SEARCH) {
mask |= X_OK;
}
} else {
if (action & (KAUTH_VNODE_READ_DATA | KAUTH_VNODE_READ_EXTATTRIBUTES)) {
mask |= R_OK;
}
if (action & (KAUTH_VNODE_WRITE_DATA | KAUTH_VNODE_APPEND_DATA)) {
mask |= W_OK;
}
if (action & KAUTH_VNODE_EXECUTE) {
mask |= X_OK;
}
}
if (action & (KAUTH_VNODE_WRITE_ATTRIBUTES |
KAUTH_VNODE_WRITE_EXTATTRIBUTES |
KAUTH_VNODE_WRITE_SECURITY)) {
mask |= W_OK;
}
bzero(&fdi, sizeof(fdi));
fdisp_init(&fdi, sizeof(*fai));
fdisp_make_vp(&fdi, FUSE_ACCESS, vp, context);
fai = fdi.indata;
fai->mask = F_OK;
fai->mask |= mask;
if (!(err = fdisp_wait_answ(&fdi))) {
fuse_ticket_drop(fdi.tick);
}
if (err == ENOSYS) {
/*
* Make sure we don't come in here again.
*/
vfs_clearauthopaque(mp);
fuse_clear_implemented(data, FSESS_NOIMPLBIT(ACCESS));
err = default_error;
}
if (err == ENOENT) {
const char *vname = NULL;
#if M_MACFUSE_ENABLE_UNSUPPORTED
vname = vnode_getname(vp);
#endif /* M_MACFUSE_ENABLE_UNSUPPORTED */
IOLog("MacFUSE: disappearing vnode %p (name=%s type=%d action=%x)\n",
vp, (vname) ? vname : "?", vnode_vtype(vp), action);
#if M_MACFUSE_ENABLE_UNSUPPORTED
if (vname) {
vnode_putname(vname);
}
#endif /* M_MACFUSE_ENABLE_UNSUPPORTED */
/*
* On 10.4, I think I can get Finder to lock because of /.Trashes/<uid>
* unless I use REVOKE_NONE here.
*/
#if M_MACFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_MACFUSE_ENABLE_HUGE_LOCK
fuse_biglock_unlock(data->biglock);
#endif
fuse_internal_vnode_disappear(vp, context, REVOKE_SOFT);
#if M_MACFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_MACFUSE_ENABLE_HUGE_LOCK
fuse_biglock_lock(data->biglock);
#endif
}
return err;
}
static errno_t
fuse_vfsop_mount(mount_t mp, __unused vnode_t devvp, user_addr_t udata,
vfs_context_t context)
{
int err = 0;
int mntopts = 0;
bool mounted = false;
uint32_t drandom = 0;
uint32_t max_read = ~0;
size_t len;
fuse_device_t fdev = NULL;
struct fuse_data *data = NULL;
fuse_mount_args fusefs_args;
struct vfsstatfs *vfsstatfsp = vfs_statfs(mp);
kern_return_t kr;
thread_t init_thread;
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_t *biglock;
#endif
fuse_trace_printf_vfsop();
if (vfs_isupdate(mp)) {
return ENOTSUP;
}
err = copyin(udata, &fusefs_args, sizeof(fusefs_args));
if (err) {
return EINVAL;
}
/*
* Interesting flags that we can receive from mount or may want to
* otherwise forcibly set include:
*
* MNT_ASYNC
* MNT_AUTOMOUNTED
* MNT_DEFWRITE
* MNT_DONTBROWSE
* MNT_IGNORE_OWNERSHIP
* MNT_JOURNALED
* MNT_NODEV
* MNT_NOEXEC
* MNT_NOSUID
* MNT_NOUSERXATTR
* MNT_RDONLY
* MNT_SYNCHRONOUS
* MNT_UNION
*/
#if M_OSXFUSE_ENABLE_UNSUPPORTED
vfs_setlocklocal(mp);
#endif /* M_OSXFUSE_ENABLE_UNSUPPORTED */
/** Option Processing. **/
if (fusefs_args.altflags & FUSE_MOPT_FSTYPENAME) {
size_t typenamelen = strlen(fusefs_args.fstypename);
if ((typenamelen <= 0) || (typenamelen > FUSE_FSTYPENAME_MAXLEN)) {
return EINVAL;
}
snprintf(vfsstatfsp->f_fstypename, MFSTYPENAMELEN, "%s%s",
OSXFUSE_FSTYPENAME_PREFIX, fusefs_args.fstypename);
}
if ((fusefs_args.daemon_timeout > FUSE_MAX_DAEMON_TIMEOUT) ||
(fusefs_args.daemon_timeout < FUSE_MIN_DAEMON_TIMEOUT)) {
return EINVAL;
}
if (fusefs_args.altflags & FUSE_MOPT_SPARSE) {
mntopts |= FSESS_SPARSE;
}
if (fusefs_args.altflags & FUSE_MOPT_SLOW_STATFS) {
mntopts |= FSESS_SLOW_STATFS;
}
if (fusefs_args.altflags & FUSE_MOPT_AUTO_CACHE) {
mntopts |= FSESS_AUTO_CACHE;
}
if (fusefs_args.altflags & FUSE_MOPT_AUTO_XATTR) {
if (fusefs_args.altflags & FUSE_MOPT_NATIVE_XATTR) {
return EINVAL;
}
mntopts |= FSESS_AUTO_XATTR;
} else if (fusefs_args.altflags & FUSE_MOPT_NATIVE_XATTR) {
mntopts |= FSESS_NATIVE_XATTR;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_BROWSE) {
vfs_setflags(mp, MNT_DONTBROWSE);
}
if (fusefs_args.altflags & FUSE_MOPT_JAIL_SYMLINKS) {
mntopts |= FSESS_JAIL_SYMLINKS;
}
/*
* Note that unlike Linux, which keeps allow_root in user-space and
* passes allow_other in that case to the kernel, we let allow_root
* reach the kernel. The 'if' ordering is important here.
*/
if (fusefs_args.altflags & FUSE_MOPT_ALLOW_ROOT) {
int is_member = 0;
if ((kauth_cred_ismember_gid(kauth_cred_get(), fuse_admin_group,
&is_member) == 0) && is_member) {
mntopts |= FSESS_ALLOW_ROOT;
} else {
IOLog("OSXFUSE: caller not a member of OSXFUSE admin group (%d)\n",
fuse_admin_group);
return EPERM;
}
} else if (fusefs_args.altflags & FUSE_MOPT_ALLOW_OTHER) {
if (!fuse_allow_other && !fuse_vfs_context_issuser(context)) {
int is_member = 0;
if ((kauth_cred_ismember_gid(kauth_cred_get(), fuse_admin_group,
&is_member) != 0) || !is_member) {
return EPERM;
}
}
mntopts |= FSESS_ALLOW_OTHER;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_APPLEDOUBLE) {
mntopts |= FSESS_NO_APPLEDOUBLE;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_APPLEXATTR) {
mntopts |= FSESS_NO_APPLEXATTR;
}
if ((fusefs_args.altflags & FUSE_MOPT_FSID) && (fusefs_args.fsid != 0)) {
fsid_t fsid;
mount_t other_mp;
uint32_t target_dev;
target_dev = FUSE_MAKEDEV(FUSE_CUSTOM_FSID_DEVICE_MAJOR,
fusefs_args.fsid);
fsid.val[0] = target_dev;
fsid.val[1] = FUSE_CUSTOM_FSID_VAL1;
other_mp = vfs_getvfs(&fsid);
if (other_mp != NULL) {
return EPERM;
}
vfsstatfsp->f_fsid.val[0] = target_dev;
vfsstatfsp->f_fsid.val[1] = FUSE_CUSTOM_FSID_VAL1;
} else {
vfs_getnewfsid(mp);
}
if (fusefs_args.altflags & FUSE_MOPT_NO_LOCALCACHES) {
mntopts |= FSESS_NO_ATTRCACHE;
mntopts |= FSESS_NO_READAHEAD;
mntopts |= FSESS_NO_UBC;
mntopts |= FSESS_NO_VNCACHE;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_ATTRCACHE) {
mntopts |= FSESS_NO_ATTRCACHE;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_READAHEAD) {
mntopts |= FSESS_NO_READAHEAD;
}
if (fusefs_args.altflags & (FUSE_MOPT_NO_UBC | FUSE_MOPT_DIRECT_IO)) {
mntopts |= FSESS_NO_UBC;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_VNCACHE) {
mntopts |= FSESS_NO_VNCACHE;
}
if (fusefs_args.altflags & FUSE_MOPT_NEGATIVE_VNCACHE) {
if (mntopts & FSESS_NO_VNCACHE) {
return EINVAL;
}
mntopts |= FSESS_NEGATIVE_VNCACHE;
}
if (fusefs_args.altflags & FUSE_MOPT_NO_SYNCWRITES) {
/* Cannot mix 'nosyncwrites' with 'noubc' or 'noreadahead'. */
if (mntopts & (FSESS_NO_READAHEAD | FSESS_NO_UBC)) {
return EINVAL;
}
mntopts |= FSESS_NO_SYNCWRITES;
vfs_clearflags(mp, MNT_SYNCHRONOUS);
vfs_setflags(mp, MNT_ASYNC);
/* We check for this only if we have nosyncwrites in the first place. */
if (fusefs_args.altflags & FUSE_MOPT_NO_SYNCONCLOSE) {
mntopts |= FSESS_NO_SYNCONCLOSE;
}
} else {
vfs_clearflags(mp, MNT_ASYNC);
vfs_setflags(mp, MNT_SYNCHRONOUS);
}
if (mntopts & FSESS_NO_UBC) {
/* If no buffer cache, disallow exec from file system. */
vfs_setflags(mp, MNT_NOEXEC);
}
vfs_setauthopaque(mp);
vfs_setauthopaqueaccess(mp);
if ((fusefs_args.altflags & FUSE_MOPT_DEFAULT_PERMISSIONS) &&
(fusefs_args.altflags & FUSE_MOPT_DEFER_PERMISSIONS)) {
return EINVAL;
}
if (fusefs_args.altflags & FUSE_MOPT_DEFAULT_PERMISSIONS) {
mntopts |= FSESS_DEFAULT_PERMISSIONS;
vfs_clearauthopaque(mp);
}
if (fusefs_args.altflags & FUSE_MOPT_DEFER_PERMISSIONS) {
mntopts |= FSESS_DEFER_PERMISSIONS;
}
if (fusefs_args.altflags & FUSE_MOPT_EXTENDED_SECURITY) {
mntopts |= FSESS_EXTENDED_SECURITY;
vfs_setextendedsecurity(mp);
}
if (fusefs_args.altflags & FUSE_MOPT_LOCALVOL) {
mntopts |= FSESS_LOCALVOL;
vfs_setflags(mp, MNT_LOCAL);
}
/* done checking incoming option bits */
err = 0;
vfs_setfsprivate(mp, NULL);
fdev = fuse_device_get(fusefs_args.rdev);
if (!fdev) {
return EINVAL;
}
fuse_device_lock(fdev);
drandom = fuse_device_get_random(fdev);
if (fusefs_args.random != drandom) {
fuse_device_unlock(fdev);
IOLog("OSXFUSE: failing mount because of mismatched random\n");
return EINVAL;
}
data = fuse_device_get_mpdata(fdev);
if (!data) {
fuse_device_unlock(fdev);
return ENXIO;
}
#if M_OSXFUSE_ENABLE_BIG_LOCK
biglock = data->biglock;
fuse_biglock_lock(biglock);
#endif
if (data->mount_state != FM_NOTMOUNTED) {
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(biglock);
#endif
fuse_device_unlock(fdev);
return EALREADY;
}
if (!(data->dataflags & FSESS_OPENED)) {
fuse_device_unlock(fdev);
err = ENXIO;
goto out;
}
data->mount_state = FM_MOUNTED;
OSAddAtomic(1, (SInt32 *)&fuse_mount_count);
mounted = true;
if (fdata_dead_get(data)) {
fuse_device_unlock(fdev);
err = ENOTCONN;
goto out;
}
if (!data->daemoncred) {
panic("OSXFUSE: daemon found but identity unknown");
}
if (fuse_vfs_context_issuser(context) &&
kauth_cred_getuid(vfs_context_ucred(context)) != kauth_cred_getuid(data->daemoncred)) {
fuse_device_unlock(fdev);
err = EPERM;
goto out;
}
data->mp = mp;
data->fdev = fdev;
data->dataflags |= mntopts;
data->daemon_timeout.tv_sec = fusefs_args.daemon_timeout;
data->daemon_timeout.tv_nsec = 0;
if (data->daemon_timeout.tv_sec) {
data->daemon_timeout_p = &(data->daemon_timeout);
} else {
data->daemon_timeout_p = (struct timespec *)0;
}
data->max_read = max_read;
data->fssubtype = fusefs_args.fssubtype;
data->mountaltflags = fusefs_args.altflags;
data->noimplflags = (uint64_t)0;
data->blocksize = fuse_round_size(fusefs_args.blocksize,
FUSE_MIN_BLOCKSIZE, FUSE_MAX_BLOCKSIZE);
data->iosize = fuse_round_size(fusefs_args.iosize,
FUSE_MIN_IOSIZE, FUSE_MAX_IOSIZE);
if (data->iosize < data->blocksize) {
data->iosize = data->blocksize;
}
data->userkernel_bufsize = FUSE_DEFAULT_USERKERNEL_BUFSIZE;
copystr(fusefs_args.fsname, vfsstatfsp->f_mntfromname,
MNAMELEN - 1, &len);
bzero(vfsstatfsp->f_mntfromname + len, MNAMELEN - len);
copystr(fusefs_args.volname, data->volname, MAXPATHLEN - 1, &len);
bzero(data->volname + len, MAXPATHLEN - len);
/* previous location of vfs_setioattr() */
vfs_setfsprivate(mp, data);
fuse_device_unlock(fdev);
/* Send a handshake message to the daemon. */
kr = kernel_thread_start(fuse_internal_init, data, &init_thread);
if (kr != KERN_SUCCESS) {
IOLog("OSXFUSE: could not start init thread\n");
err = ENOTCONN;
} else {
thread_deallocate(init_thread);
}
out:
if (err) {
vfs_setfsprivate(mp, NULL);
fuse_device_lock(fdev);
data = fuse_device_get_mpdata(fdev); /* again */
if (mounted) {
OSAddAtomic(-1, (SInt32 *)&fuse_mount_count);
}
if (data) {
data->mount_state = FM_NOTMOUNTED;
if (!(data->dataflags & FSESS_OPENED)) {
#if M_OSXFUSE_ENABLE_BIG_LOCK
assert(biglock == data->biglock);
fuse_biglock_unlock(biglock);
#endif
fuse_device_close_final(fdev);
/* data is gone now */
}
}
fuse_device_unlock(fdev);
} else {
vnode_t fuse_rootvp = NULLVP;
err = fuse_vfsop_root(mp, &fuse_rootvp, context);
if (err) {
goto out; /* go back and follow error path */
}
err = vnode_ref(fuse_rootvp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
/*
* Even though fuse_rootvp will not be reclaimed when calling vnode_put
* because we incremented its usecount by calling vnode_ref release
* biglock just to be safe.
*/
fuse_biglock_unlock(biglock);
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
(void)vnode_put(fuse_rootvp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(biglock);
#endif
if (err) {
goto out; /* go back and follow error path */
} else {
struct vfsioattr ioattr;
vfs_ioattr(mp, &ioattr);
ioattr.io_maxreadcnt = ioattr.io_maxwritecnt = data->iosize;
ioattr.io_segreadcnt = ioattr.io_segwritecnt = data->iosize / PAGE_SIZE;
ioattr.io_maxsegreadsize = ioattr.io_maxsegwritesize = data->iosize;
ioattr.io_devblocksize = data->blocksize;
vfs_setioattr(mp, &ioattr);
}
}
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_device_lock(fdev);
data = fuse_device_get_mpdata(fdev); /* ...and again */
if(data) {
assert(data->biglock == biglock);
fuse_biglock_unlock(biglock);
}
fuse_device_unlock(fdev);
#endif
return err;
}
static errno_t
fuse_vfsop_setattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t context)
{
int error = 0;
fuse_trace_printf_vfsop();
kauth_cred_t cred = vfs_context_ucred(context);
if (!fuse_vfs_context_issuser(context) &&
(kauth_cred_getuid(cred) != vfs_statfs(mp)->f_owner)) {
return EACCES;
}
struct fuse_data *data = fuse_get_mpdata(mp);
if (VFSATTR_IS_ACTIVE(fsap, f_vol_name)) {
if (!fuse_implemented(data, FSESS_NOIMPLBIT(SETVOLNAME))) {
error = ENOTSUP;
goto out;
}
if (fsap->f_vol_name[0] == 0) {
error = EINVAL;
goto out;
}
size_t namelen = strlen(fsap->f_vol_name);
if (namelen >= MAXPATHLEN) {
error = ENAMETOOLONG;
goto out;
}
vnode_t root_vp;
error = fuse_vfsop_root(mp, &root_vp, context);
if (error) {
goto out;
}
struct fuse_dispatcher fdi;
fdisp_init(&fdi, namelen + 1);
fdisp_make_vp(&fdi, FUSE_SETVOLNAME, root_vp, context);
memcpy((char *)fdi.indata, fsap->f_vol_name, namelen);
((char *)fdi.indata)[namelen] = '\0';
error = fdisp_wait_answ(&fdi);
if (!error) {
fuse_ticket_release(fdi.tick);
}
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(data->biglock);
#endif
(void)vnode_put(root_vp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(data->biglock);
#endif
if (error) {
if (error == ENOSYS) {
error = ENOTSUP;
fuse_clear_implemented(data, FSESS_NOIMPLBIT(SETVOLNAME));
}
goto out;
}
copystr(fsap->f_vol_name, data->volname, MAXPATHLEN - 1, &namelen);
bzero(data->volname + namelen, MAXPATHLEN - namelen);
VFSATTR_SET_SUPPORTED(fsap, f_vol_name);
}
out:
return error;
}