int do_mount(char *spec, char *dir, int mflag, char *opt)
{
// VERIFY(mflag == 0);
vfs_t *vfs = kmem_zalloc(sizeof(vfs_t), KM_SLEEP);
if(vfs == NULL)
return ENOMEM;
VFS_INIT(vfs, zfs_vfsops, 0);
VFS_HOLD(vfs);
struct mounta uap = {
.spec = spec,
.dir = dir,
.flags = mflag | MS_SYSSPACE,
.fstype = "zfs-fuse",
.dataptr = "",
.datalen = 0,
.optptr = opt,
.optlen = strlen(opt)
};
int ret;
if ((ret = VFS_MOUNT(vfs, rootdir, &uap, kcred)) != 0) {
kmem_free(vfs, sizeof(vfs_t));
return ret;
}
/* Actually, optptr is totally ignored by VFS_MOUNT.
* So we are going to pass this with fuse_mount_options if possible */
if (fuse_mount_options == NULL)
fuse_mount_options = "";
char real_opts[1024];
*real_opts = 0;
if (*fuse_mount_options)
strcat(real_opts,fuse_mount_options); // comes with a starting ,
if (*opt)
sprintf(&real_opts[strlen(real_opts)],",%s",opt);
#ifdef DEBUG
atomic_inc_32(&mounted);;
fprintf(stderr, "mounting %s\n", dir);
#endif
char *fuse_opts = NULL;
int has_default_perm = 0;
if (fuse_version() <= 27) {
if(asprintf(&fuse_opts, FUSE_OPTIONS, spec, real_opts) == -1) {
VERIFY(do_umount(vfs, B_FALSE) == 0);
return ENOMEM;
}
} else {
if(asprintf(&fuse_opts, FUSE_OPTIONS ",big_writes", spec, real_opts) == -1) {
VERIFY(do_umount(vfs, B_FALSE) == 0);
return ENOMEM;
}
}
struct fuse_args args = FUSE_ARGS_INIT(0, NULL);
if(fuse_opt_add_arg(&args, "") == -1 ||
fuse_opt_add_arg(&args, "-o") == -1 ||
fuse_opt_add_arg(&args, fuse_opts) == -1) {
fuse_opt_free_args(&args);
free(fuse_opts);
VERIFY(do_umount(vfs, B_FALSE) == 0);
return ENOMEM;
}
has_default_perm = detect_fuseoption(fuse_opts,"default_permissions");
free(fuse_opts);
struct fuse_chan *ch = fuse_mount(dir, &args);
if(ch == NULL) {
VERIFY(do_umount(vfs, B_FALSE) == 0);
return EIO;
}
if (has_default_perm)
vfs->fuse_attribute = FUSE_VFS_HAS_DEFAULT_PERM;
struct fuse_session *se = fuse_lowlevel_new(&args, &zfs_operations, sizeof(zfs_operations), vfs);
fuse_opt_free_args(&args);
if(se == NULL) {
VERIFY(do_umount(vfs, B_FALSE) == 0); /* ZFSFUSE: FIXME?? */
fuse_unmount(dir,ch);
return EIO;
}
fuse_session_add_chan(se, ch);
if(zfsfuse_newfs(dir, ch) != 0) {
fuse_session_destroy(se);
fuse_unmount(dir,ch);
return EIO;
}
return 0;
}
/*
* Configure root file system.
*/
int
rootconf(void)
{
int error;
struct vfssw *vsw;
extern void pm_init(void);
BMDPRINTF(("rootconf: fstype %s\n", rootfs.bo_fstype));
BMDPRINTF(("rootconf: name %s\n", rootfs.bo_name));
BMDPRINTF(("rootconf: flags 0x%x\n", rootfs.bo_flags));
BMDPRINTF(("rootconf: obp_bootpath %s\n", obp_bootpath));
/*
* Install cluster modules that were only loaded during
* loadrootmodules().
*/
if (error = clboot_rootconf())
return (error);
if (root_is_svm) {
(void) strncpy(rootfs.bo_name, obp_bootpath, BO_MAXOBJNAME);
BMDPRINTF(("rootconf: svm: rootfs name %s\n", rootfs.bo_name));
BMDPRINTF(("rootconf: svm: svm name %s\n", svm_bootpath));
}
/*
* Run _init on the root filesystem (we already loaded it
* but we've been waiting until now to _init it) which will
* have the side-effect of running vsw_init() on this vfs.
* Because all the nfs filesystems are lumped into one
* module we need to special case it.
*/
if (strncmp(rootfs.bo_fstype, "nfs", 3) == 0) {
if (modload("fs", "nfs") == -1) {
cmn_err(CE_CONT, "Cannot initialize %s filesystem\n",
rootfs.bo_fstype);
return (ENXIO);
}
} else {
if (modload("fs", rootfs.bo_fstype) == -1) {
cmn_err(CE_CONT, "Cannot initialize %s filesystem\n",
rootfs.bo_fstype);
return (ENXIO);
}
}
RLOCK_VFSSW();
vsw = vfs_getvfsswbyname(rootfs.bo_fstype);
RUNLOCK_VFSSW();
VFS_INIT(rootvfs, &vsw->vsw_vfsops, (caddr_t)0);
VFS_HOLD(rootvfs);
if (root_is_svm) {
rootvfs->vfs_flag |= VFS_RDONLY;
}
/*
* This pm-releated call has to occur before root is mounted since we
* need to power up all devices. It is placed after VFS_INIT() such
* that opening a device via ddi_lyr_ interface just before root has
* been mounted would work.
*/
pm_init();
if (netboot) {
if ((error = strplumb()) != 0) {
cmn_err(CE_CONT, "Cannot plumb network device\n");
return (error);
}
}
/*
* ufs_mountroot() ends up calling getrootdev()
* (below) which actually triggers the _init, identify,
* probe and attach of the drivers that make up root device
* bush; these are also quietly waiting in memory.
*/
BMDPRINTF(("rootconf: calling VFS_MOUNTROOT %s\n", rootfs.bo_fstype));
error = VFS_MOUNTROOT(rootvfs, ROOT_INIT);
vfs_unrefvfssw(vsw);
rootdev = rootvfs->vfs_dev;
if (error)
cmn_err(CE_CONT, "Cannot mount root on %s fstype %s\n",
rootfs.bo_name, rootfs.bo_fstype);
else
cmn_err(CE_CONT, "?root on %s fstype %s\n",
rootfs.bo_name, rootfs.bo_fstype);
return (error);
}
/*
* Get/Make vfs structure for given real vfs
*/
static struct vfs *
makelfsnode(struct vfs *vfsp, struct loinfo *li)
{
struct lfsnode *lfs;
struct lfsnode *tlfs;
/*
* Don't grab any locks for the fast (common) case.
*/
if (vfsp == li->li_realvfs)
return (li->li_mountvfs);
ASSERT(li->li_refct > 0);
mutex_enter(&li->li_lfslock);
if ((lfs = lfsfind(vfsp, li)) == NULL) {
mutex_exit(&li->li_lfslock);
lfs = kmem_zalloc(sizeof (*lfs), KM_SLEEP);
mutex_enter(&li->li_lfslock);
if ((tlfs = lfsfind(vfsp, li)) != NULL) {
kmem_free(lfs, sizeof (*lfs));
lfs = tlfs;
goto found_lfs;
}
lfs->lfs_realvfs = vfsp;
/*
* Even though the lfsnode is strictly speaking a private
* implementation detail of lofs, it should behave as a regular
* vfs_t for the benefit of the rest of the kernel.
*/
VFS_INIT(&lfs->lfs_vfs, lo_vfsops, (caddr_t)li);
lfs->lfs_vfs.vfs_fstype = li->li_mountvfs->vfs_fstype;
lfs->lfs_vfs.vfs_flag =
((vfsp->vfs_flag | li->li_mflag) & ~li->li_dflag) &
INHERIT_VFS_FLAG;
lfs->lfs_vfs.vfs_bsize = vfsp->vfs_bsize;
lfs->lfs_vfs.vfs_dev = vfsp->vfs_dev;
lfs->lfs_vfs.vfs_fsid = vfsp->vfs_fsid;
if (vfsp->vfs_mntpt != NULL) {
lfs->lfs_vfs.vfs_mntpt = vfs_getmntpoint(vfsp);
/* Leave a reference to the mountpoint */
}
(void) VFS_ROOT(vfsp, &lfs->lfs_realrootvp);
/*
* We use 1 instead of 0 as the value to associate with
* an idle lfs_vfs. This is to prevent VFS_RELE()
* trying to kmem_free() our lfs_t (which is the wrong
* size).
*/
VFS_HOLD(&lfs->lfs_vfs);
lfs->lfs_next = li->li_lfs;
li->li_lfs = lfs;
vfs_propagate_features(vfsp, &lfs->lfs_vfs);
}
found_lfs:
VFS_HOLD(&lfs->lfs_vfs);
mutex_exit(&li->li_lfslock);
return (&lfs->lfs_vfs);
}
