linux-kernel - Re: [PATCH] fs: fix sysctls.c built

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Message-ID: <20230413-kufen-infekt-02c7eb2a9adc@brauner>
Date:   Thu, 13 Apr 2023 10:35:18 +0200
From:   Christian Brauner <brauner@...nel.org>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>
Cc:     Luis Chamberlain <mcgrof@...nel.org>,
        linux-fsdevel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org,
        Alexander Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH] fs: fix sysctls.c built

On Thu, Apr 13, 2023 at 09:34:54AM +0800, Kefeng Wang wrote:
> 
> 
> On 2023/4/12 17:19, Christian Brauner wrote:
> > On Tue, Apr 11, 2023 at 12:14:44PM +0800, Kefeng Wang wrote:
> > > /proc/sys/fs/overflowuid and overflowgid  will be lost without
> > > building this file, kindly ping, any comments, thanks.
> > > 
> > > 
> > > On 2023/3/31 16:45, Kefeng Wang wrote:
> > > > 'obj-$(CONFIG_SYSCTL) += sysctls.o' must be moved after "obj-y :=",
> > > > or it won't be built as it is overwrited.
> 
> ...
> 
> > Given the description in
> > ab171b952c6e ("fs: move namespace sysctls and declare fs base directory")
> > you probably want to move this earlier.
> 
> Oh, missing that part, but the /proc/sys/fs/overflowuid and overflowgid are
> lost after it, is it expected? Luis, could you take a look? thanks.

No, /proc/sys/fs/overflow{g,u}id need to be there of course. What I mean
is something like the following (similar to how net/core/ does it):

UNTESTED
---
 fs/Makefile | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/fs/Makefile b/fs/Makefile
index 05f89b5c962f..dfaea8a28d92 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -6,17 +6,19 @@
 # Rewritten to use lists instead of if-statements.
 #

-obj-$(CONFIG_SYSCTL)           += sysctls.o
-
-obj-y :=       open.o read_write.o file_table.o super.o \
-               char_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
-               ioctl.o readdir.o select.o dcache.o inode.o \
-               attr.o bad_inode.o file.o filesystems.o namespace.o \
-               seq_file.o xattr.o libfs.o fs-writeback.o \
-               pnode.o splice.o sync.o utimes.o d_path.o \
-               stack.o fs_struct.o statfs.o fs_pin.o nsfs.o \
-               fs_types.o fs_context.o fs_parser.o fsopen.o init.o \
-               kernel_read_file.o mnt_idmapping.o remap_range.o
+obj-y                  := fs_types.o
+obj-$(CONFIG_SYSCTL)   += sysctls.o
+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 init.o kernel_read_file.o \
+                          mnt_idmapping.o remap_range.o

 ifeq ($(CONFIG_BLOCK),y)
 obj-y +=       buffer.o mpage.o
--
2.34.1