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debugfs: continue to ignore unknown mount options

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Wolfram reported that debugfs remained empty on some of his boards
triggering the message "debugfs: Unknown parameter 'auto'".

The root of the issue is that we ignored unknown mount options in the
old mount api but we started rejecting unknown mount options in the new
mount api. Continue to ignore unknown mount options to not regress
userspace.

Fixes: a20971c18752 ("vfs: Convert debugfs to use the new mount API")
Link: https://lore.kernel.org/r/20240527100618.np2wqiw5mz7as3vk@ninjato
Reported-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2024-05-27 14:15:22 +02:00
parent 2bfcfd584f
commit 0c07c273a5
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 9 additions and 1 deletions
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10
fs/debugfs/inode.c
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@ -107,8 +107,16 @@ static int debugfs_parse_param(struct fs_context *fc, struct fs_parameter *param
int opt; int opt;
opt = fs_parse(fc, debugfs_param_specs, param, &result); opt = fs_parse(fc, debugfs_param_specs, param, &result);
if (opt < 0) if (opt < 0) {
/*
* We might like to report bad mount options here; but
* traditionally debugfs has ignored all mount options
*/
if (opt == -ENOPARAM)
return 0;
return opt; return opt;
}
switch (opt) { switch (opt) {
case Opt_uid: case Opt_uid: