forked from Minki/linux
24dcb3d90a
Provide an fsopen() system call that starts the process of preparing to
create a superblock that will then be mountable, using an fd as a context
handle. fsopen() is given the name of the filesystem that will be used:
int mfd = fsopen(const char *fsname, unsigned int flags);
where flags can be 0 or FSOPEN_CLOEXEC.
For example:
sfd = fsopen("ext4", FSOPEN_CLOEXEC);
fsconfig(sfd, FSCONFIG_SET_PATH, "source", "/dev/sda1", AT_FDCWD);
fsconfig(sfd, FSCONFIG_SET_FLAG, "noatime", NULL, 0);
fsconfig(sfd, FSCONFIG_SET_FLAG, "acl", NULL, 0);
fsconfig(sfd, FSCONFIG_SET_FLAG, "user_xattr", NULL, 0);
fsconfig(sfd, FSCONFIG_SET_STRING, "sb", "1", 0);
fsconfig(sfd, FSCONFIG_CMD_CREATE, NULL, NULL, 0);
fsinfo(sfd, NULL, ...); // query new superblock attributes
mfd = fsmount(sfd, FSMOUNT_CLOEXEC, MS_RELATIME);
move_mount(mfd, "", sfd, AT_FDCWD, "/mnt", MOVE_MOUNT_F_EMPTY_PATH);
sfd = fsopen("afs", -1);
fsconfig(fd, FSCONFIG_SET_STRING, "source",
"#grand.central.org:root.cell", 0);
fsconfig(fd, FSCONFIG_CMD_CREATE, NULL, NULL, 0);
mfd = fsmount(sfd, 0, MS_NODEV);
move_mount(mfd, "", sfd, AT_FDCWD, "/mnt", MOVE_MOUNT_F_EMPTY_PATH);
If an error is reported at any step, an error message may be available to be
read() back (ENODATA will be reported if there isn't an error available) in
the form:
"e <subsys>:<problem>"
"e SELinux:Mount on mountpoint not permitted"
Once fsmount() has been called, further fsconfig() calls will incur EBUSY,
even if the fsmount() fails. read() is still possible to retrieve error
information.
The fsopen() syscall creates a mount context and hangs it of the fd that it
returns.
Netlink is not used because it is optional and would make the core VFS
dependent on the networking layer and also potentially add network
namespace issues.
Note that, for the moment, the caller must have SYS_CAP_ADMIN to use
fsopen().
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-api@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
132 lines
4.3 KiB
Makefile
132 lines
4.3 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# Makefile for the Linux filesystems.
|
|
#
|
|
# 14 Sep 2000, Christoph Hellwig <hch@infradead.org>
|
|
# Rewritten to use lists instead of if-statements.
|
|
#
|
|
|
|
obj-y := open.o read_write.o file_table.o super.o \
|
|
char_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
|
|
ioctl.o readdir.o select.o dcache.o inode.o \
|
|
attr.o bad_inode.o file.o filesystems.o namespace.o \
|
|
seq_file.o xattr.o libfs.o fs-writeback.o \
|
|
pnode.o splice.o sync.o utimes.o d_path.o \
|
|
stack.o fs_struct.o statfs.o fs_pin.o nsfs.o \
|
|
fs_types.o fs_context.o fs_parser.o fsopen.o
|
|
|
|
ifeq ($(CONFIG_BLOCK),y)
|
|
obj-y += buffer.o block_dev.o direct-io.o mpage.o
|
|
else
|
|
obj-y += no-block.o
|
|
endif
|
|
|
|
obj-$(CONFIG_PROC_FS) += proc_namespace.o
|
|
|
|
obj-y += notify/
|
|
obj-$(CONFIG_EPOLL) += eventpoll.o
|
|
obj-y += anon_inodes.o
|
|
obj-$(CONFIG_SIGNALFD) += signalfd.o
|
|
obj-$(CONFIG_TIMERFD) += timerfd.o
|
|
obj-$(CONFIG_EVENTFD) += eventfd.o
|
|
obj-$(CONFIG_USERFAULTFD) += userfaultfd.o
|
|
obj-$(CONFIG_AIO) += aio.o
|
|
obj-$(CONFIG_IO_URING) += io_uring.o
|
|
obj-$(CONFIG_FS_DAX) += dax.o
|
|
obj-$(CONFIG_FS_ENCRYPTION) += crypto/
|
|
obj-$(CONFIG_FILE_LOCKING) += locks.o
|
|
obj-$(CONFIG_COMPAT) += compat.o compat_ioctl.o
|
|
obj-$(CONFIG_BINFMT_AOUT) += binfmt_aout.o
|
|
obj-$(CONFIG_BINFMT_EM86) += binfmt_em86.o
|
|
obj-$(CONFIG_BINFMT_MISC) += binfmt_misc.o
|
|
obj-$(CONFIG_BINFMT_SCRIPT) += binfmt_script.o
|
|
obj-$(CONFIG_BINFMT_ELF) += binfmt_elf.o
|
|
obj-$(CONFIG_COMPAT_BINFMT_ELF) += compat_binfmt_elf.o
|
|
obj-$(CONFIG_BINFMT_ELF_FDPIC) += binfmt_elf_fdpic.o
|
|
obj-$(CONFIG_BINFMT_FLAT) += binfmt_flat.o
|
|
|
|
obj-$(CONFIG_FS_MBCACHE) += mbcache.o
|
|
obj-$(CONFIG_FS_POSIX_ACL) += posix_acl.o
|
|
obj-$(CONFIG_NFS_COMMON) += nfs_common/
|
|
obj-$(CONFIG_COREDUMP) += coredump.o
|
|
obj-$(CONFIG_SYSCTL) += drop_caches.o
|
|
|
|
obj-$(CONFIG_FHANDLE) += fhandle.o
|
|
obj-$(CONFIG_FS_IOMAP) += iomap.o
|
|
|
|
obj-y += quota/
|
|
|
|
obj-$(CONFIG_PROC_FS) += proc/
|
|
obj-$(CONFIG_KERNFS) += kernfs/
|
|
obj-$(CONFIG_SYSFS) += sysfs/
|
|
obj-$(CONFIG_CONFIGFS_FS) += configfs/
|
|
obj-y += devpts/
|
|
|
|
obj-$(CONFIG_PROFILING) += dcookies.o
|
|
obj-$(CONFIG_DLM) += dlm/
|
|
|
|
# Do not add any filesystems before this line
|
|
obj-$(CONFIG_FSCACHE) += fscache/
|
|
obj-$(CONFIG_REISERFS_FS) += reiserfs/
|
|
obj-$(CONFIG_EXT4_FS) += ext4/
|
|
# We place ext4 before ext2 so that clean ext3 root fs's do NOT mount using the
|
|
# ext2 driver, which doesn't know about journalling! Explicitly request ext2
|
|
# by giving the rootfstype= parameter.
|
|
obj-$(CONFIG_EXT2_FS) += ext2/
|
|
obj-$(CONFIG_JBD2) += jbd2/
|
|
obj-$(CONFIG_CRAMFS) += cramfs/
|
|
obj-$(CONFIG_SQUASHFS) += squashfs/
|
|
obj-y += ramfs/
|
|
obj-$(CONFIG_HUGETLBFS) += hugetlbfs/
|
|
obj-$(CONFIG_CODA_FS) += coda/
|
|
obj-$(CONFIG_MINIX_FS) += minix/
|
|
obj-$(CONFIG_FAT_FS) += fat/
|
|
obj-$(CONFIG_BFS_FS) += bfs/
|
|
obj-$(CONFIG_ISO9660_FS) += isofs/
|
|
obj-$(CONFIG_HFSPLUS_FS) += hfsplus/ # Before hfs to find wrapped HFS+
|
|
obj-$(CONFIG_HFS_FS) += hfs/
|
|
obj-$(CONFIG_ECRYPT_FS) += ecryptfs/
|
|
obj-$(CONFIG_VXFS_FS) += freevxfs/
|
|
obj-$(CONFIG_NFS_FS) += nfs/
|
|
obj-$(CONFIG_EXPORTFS) += exportfs/
|
|
obj-$(CONFIG_NFSD) += nfsd/
|
|
obj-$(CONFIG_LOCKD) += lockd/
|
|
obj-$(CONFIG_NLS) += nls/
|
|
obj-$(CONFIG_SYSV_FS) += sysv/
|
|
obj-$(CONFIG_CIFS) += cifs/
|
|
obj-$(CONFIG_HPFS_FS) += hpfs/
|
|
obj-$(CONFIG_NTFS_FS) += ntfs/
|
|
obj-$(CONFIG_UFS_FS) += ufs/
|
|
obj-$(CONFIG_EFS_FS) += efs/
|
|
obj-$(CONFIG_JFFS2_FS) += jffs2/
|
|
obj-$(CONFIG_UBIFS_FS) += ubifs/
|
|
obj-$(CONFIG_AFFS_FS) += affs/
|
|
obj-$(CONFIG_ROMFS_FS) += romfs/
|
|
obj-$(CONFIG_QNX4FS_FS) += qnx4/
|
|
obj-$(CONFIG_QNX6FS_FS) += qnx6/
|
|
obj-$(CONFIG_AUTOFS_FS) += autofs/
|
|
obj-$(CONFIG_ADFS_FS) += adfs/
|
|
obj-$(CONFIG_FUSE_FS) += fuse/
|
|
obj-$(CONFIG_OVERLAY_FS) += overlayfs/
|
|
obj-$(CONFIG_ORANGEFS_FS) += orangefs/
|
|
obj-$(CONFIG_UDF_FS) += udf/
|
|
obj-$(CONFIG_SUN_OPENPROMFS) += openpromfs/
|
|
obj-$(CONFIG_OMFS_FS) += omfs/
|
|
obj-$(CONFIG_JFS_FS) += jfs/
|
|
obj-$(CONFIG_XFS_FS) += xfs/
|
|
obj-$(CONFIG_9P_FS) += 9p/
|
|
obj-$(CONFIG_AFS_FS) += afs/
|
|
obj-$(CONFIG_NILFS2_FS) += nilfs2/
|
|
obj-$(CONFIG_BEFS_FS) += befs/
|
|
obj-$(CONFIG_HOSTFS) += hostfs/
|
|
obj-$(CONFIG_CACHEFILES) += cachefiles/
|
|
obj-$(CONFIG_DEBUG_FS) += debugfs/
|
|
obj-$(CONFIG_TRACING) += tracefs/
|
|
obj-$(CONFIG_OCFS2_FS) += ocfs2/
|
|
obj-$(CONFIG_BTRFS_FS) += btrfs/
|
|
obj-$(CONFIG_GFS2_FS) += gfs2/
|
|
obj-$(CONFIG_F2FS_FS) += f2fs/
|
|
obj-$(CONFIG_CEPH_FS) += ceph/
|
|
obj-$(CONFIG_PSTORE) += pstore/
|
|
obj-$(CONFIG_EFIVAR_FS) += efivarfs/
|