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| author | David Howells <dhowells@redhat.com> | 2018-11-02 02:36:23 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2019-03-21 01:49:06 +0300 |
| commit | cf3cba4a429be43e5527a3f78859b1bfd9ebc5fb (patch) | |
| tree | 41f4c4a999e7e22644b0f3a220208519dc1f4ccd /arch/x86/entry/syscalls/syscall_64.tbl | |
| parent | 93766fbd2696c2c4453dd8e1070977e9cd4e6b6d (diff) | |
| download | linux-cf3cba4a429be43e5527a3f78859b1bfd9ebc5fb.tar.xz | |
vfs: syscall: Add fspick() to select a superblock for reconfiguration
Provide an fspick() system call that can be used to pick an existing
mountpoint into an fs_context which can thereafter be used to reconfigure a
superblock (equivalent of the superblock side of -o remount).
This looks like:
int fd = fspick(AT_FDCWD, "/mnt",
FSPICK_CLOEXEC | FSPICK_NO_AUTOMOUNT);
fsconfig(fd, FSCONFIG_SET_FLAG, "intr", NULL, 0);
fsconfig(fd, FSCONFIG_SET_FLAG, "noac", NULL, 0);
fsconfig(fd, FSCONFIG_CMD_RECONFIGURE, NULL, NULL, 0);
At the point of fspick being called, the file descriptor referring to the
filesystem context is in exactly the same state as the one that was created
by fsopen() after fsmount() has been successfully called.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-api@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/x86/entry/syscalls/syscall_64.tbl')
| -rw-r--r-- | arch/x86/entry/syscalls/syscall_64.tbl | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index 984ad594bb2b..64ca0d06259a 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -348,6 +348,7 @@ 337 common fsopen __x64_sys_fsopen 338 common fsconfig __x64_sys_fsconfig 339 common fsmount __x64_sys_fsmount +340 common fspick __x64_sys_fspick # don't use numbers 387 through 423, add new calls after the last # 'common' entry 424 common pidfd_send_signal __x64_sys_pidfd_send_signal |