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debugfs show actual source in /proc/mounts

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After its conversion to the new mount API, debugfs displays "none" in
/proc/mounts instead of the actual source.  Fix this by recognising its
"source" mount option.

Signed-off-by: Marc Aurèle La France <tsi@tuyoix.net>
Link: https://lore.kernel.org/r/e439fae2-01da-234b-75b9-2a7951671e27@tuyoix.net
Fixes: a20971c187 ("vfs: Convert debugfs to use the new mount API")
Cc: stable@vger.kernel.org # 6.10.x: 49abee5991: debugfs: Convert to new uid/gid option parsing helpers
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Marc Aurèle La France 2024-08-10 13:25:27 -06:00 committed by Christian Brauner
parent 1c48d44146
commit 3a987b88a4
1 changed files with 8 additions and 0 deletions
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8
fs/debugfs/inode.c
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@ -89,12 +89,14 @@ enum {
Opt_uid, Opt_uid,
Opt_gid, Opt_gid,
Opt_mode, Opt_mode,
Opt_source,
}; };
static const struct fs_parameter_spec debugfs_param_specs[] = { static const struct fs_parameter_spec debugfs_param_specs[] = {
fsparam_gid ("gid", Opt_gid), fsparam_gid ("gid", Opt_gid),
fsparam_u32oct ("mode", Opt_mode), fsparam_u32oct ("mode", Opt_mode),
fsparam_uid ("uid", Opt_uid), fsparam_uid ("uid", Opt_uid),
fsparam_string ("source", Opt_source),
{} {}
}; };
@ -126,6 +128,12 @@ static int debugfs_parse_param(struct fs_context *fc, struct fs_parameter *param
case Opt_mode: case Opt_mode:
opts->mode = result.uint_32 & S_IALLUGO; opts->mode = result.uint_32 & S_IALLUGO;
break; break;
case Opt_source:
if (fc->source)
return invalfc(fc, "Multiple sources specified");
fc->source = param->string;
param->string = NULL;
break;
/* /*
* We might like to report bad mount options here; * We might like to report bad mount options here;
* but traditionally debugfs has ignored all mount options * but traditionally debugfs has ignored all mount options