Unverified Commit c4a16820 authored Jan 28, 2025 by Christian Brauner

fs: add open_tree_attr()

Add open_tree_attr() which allow to atomically create a detached mount
tree and set mount options on it. If OPEN_TREE_CLONE is used this will
allow the creation of a detached mount with a new set of mount options
without it ever being exposed to userspace without that set of mount
options applied.

Link: https://lore.kernel.org/r/20250128-work-mnt_idmap-update-v2-v1-3-c25feb0d2eb3@kernel.org

Reviewed-by: "Seth Forshee (DigitalOcean)" <sforshee@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

parent 474f7825

arch/alpha/kernel/syscalls/syscall.tbl

+1 −0

Original line number	Diff line number	Diff line
		@@ -506,3 +506,4 @@
		574 common getxattrat sys_getxattrat
		575 common listxattrat sys_listxattrat
		576 common removexattrat sys_removexattrat
		577 common open_tree_attr sys_open_tree_attr

arch/arm/tools/syscall.tbl

+1 −0

Original line number	Diff line number	Diff line
		@@ -481,3 +481,4 @@
		464 common getxattrat sys_getxattrat
		465 common listxattrat sys_listxattrat
		466 common removexattrat sys_removexattrat
		467 common open_tree_attr sys_open_tree_attr

arch/arm64/tools/syscall_32.tbl

+1 −0

Original line number	Diff line number	Diff line
		@@ -478,3 +478,4 @@
		464 common getxattrat sys_getxattrat
		465 common listxattrat sys_listxattrat
		466 common removexattrat sys_removexattrat
		467 common open_tree_attr sys_open_tree_attr

arch/m68k/kernel/syscalls/syscall.tbl

+1 −0

Original line number	Diff line number	Diff line
		@@ -466,3 +466,4 @@
		464 common getxattrat sys_getxattrat
		465 common listxattrat sys_listxattrat
		466 common removexattrat sys_removexattrat
		467 common open_tree_attr sys_open_tree_attr

arch/microblaze/kernel/syscalls/syscall.tbl

+1 −0

Original line number	Diff line number	Diff line
		@@ -472,3 +472,4 @@
		464 common getxattrat sys_getxattrat
		465 common listxattrat sys_listxattrat
		466 common removexattrat sys_removexattrat
		467 common open_tree_attr sys_open_tree_attr