linux-kernel - [PATCH v3 9/9] fs/ntfs3: Show uid/gid always in show

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Date:   Sun, 29 Aug 2021 12:56:14 +0300
From:   Kari Argillander <kari.argillander@...il.com>
To:     Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
        ntfs3@...ts.linux.dev
Cc:     Kari Argillander <kari.argillander@...il.com>,
        Christoph Hellwig <hch@....de>, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org,
        Pali Rohár <pali@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Christian Brauner <christian.brauner@...ntu.com>
Subject: [PATCH v3 9/9] fs/ntfs3: Show uid/gid always in show_options()

Show options should show option according documentation when some value
is not default or when ever coder wants. Uid/gid are problematic because
it is hard to know which are defaults. In file system there is many
different implementation for this problem.

Some file systems show uid/gid when they are different than root, some
when user has set them and some show them always. There is also problem
that what if root uid/gid change. This code just choose to show them
always. This way we do not need to think this any more.

Signed-off-by: Kari Argillander <kari.argillander@...il.com>
---
 fs/ntfs3/ntfs_fs.h | 23 ++++++++++-------------
 fs/ntfs3/super.c   | 12 ++++--------
 2 files changed, 14 insertions(+), 21 deletions(-)

diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
index 5df55bc733bd..a3a7d10de7cb 100644
--- a/fs/ntfs3/ntfs_fs.h
+++ b/fs/ntfs3/ntfs_fs.h
@@ -60,19 +60,16 @@ struct ntfs_mount_options {
 	u16 fs_fmask_inv;
 	u16 fs_dmask_inv;
 
-	unsigned uid : 1, /* uid was set */
-		gid : 1, /* gid was set */
-		fmask : 1, /* fmask was set */
-		dmask : 1, /*dmask was set*/
-		sys_immutable : 1, /* immutable system files */
-		discard : 1, /* issue discard requests on deletions */
-		sparse : 1, /*create sparse files*/
-		showmeta : 1, /*show meta files*/
-		nohidden : 1, /*do not show hidden files*/
-		force : 1, /*rw mount dirty volume*/
-		noacs_rules : 1, /*exclude acs rules*/
-		prealloc : 1 /*preallocate space when file is growing*/
-		;
+	unsigned fmask : 1; /* fmask was set */
+	unsigned dmask : 1; /*dmask was set*/
+	unsigned sys_immutable : 1; /* immutable system files */
+	unsigned discard : 1; /* issue discard requests on deletions */
+	unsigned sparse : 1; /*create sparse files*/
+	unsigned showmeta : 1; /*show meta files*/
+	unsigned nohidden : 1; /*do not show hidden files*/
+	unsigned force : 1; /*rw mount dirty volume*/
+	unsigned noacs_rules : 1; /*exclude acs rules*/
+	unsigned prealloc : 1; /*preallocate space when file is growing*/
 };
 
 /* special value to unpack and deallocate*/
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index d7408b4f6813..d28fab6c2297 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -287,13 +287,11 @@ static int ntfs_fs_parse_param(struct fs_context *fc,
 		opts->fs_uid = make_kuid(current_user_ns(), result.uint_32);
 		if (!uid_valid(opts->fs_uid))
 			return invalf(fc, "ntfs3: Invalid value for uid.");
-		opts->uid = 1;
 		break;
 	case Opt_gid:
 		opts->fs_gid = make_kgid(current_user_ns(), result.uint_32);
 		if (!gid_valid(opts->fs_gid))
 			return invalf(fc, "ntfs3: Invalid value for gid.");
-		opts->gid = 1;
 		break;
 	case Opt_umask:
 		if (result.uint_32 & ~07777)
@@ -512,12 +510,10 @@ static int ntfs_show_options(struct seq_file *m, struct dentry *root)
 	struct ntfs_mount_options *opts = sbi->options;
 	struct user_namespace *user_ns = seq_user_ns(m);
 
-	if (opts->uid)
-		seq_printf(m, ",uid=%u",
-			   from_kuid_munged(user_ns, opts->fs_uid));
-	if (opts->gid)
-		seq_printf(m, ",gid=%u",
-			   from_kgid_munged(user_ns, opts->fs_gid));
+	seq_printf(m, ",uid=%u",
+		  from_kuid_munged(user_ns, opts->fs_uid));
+	seq_printf(m, ",gid=%u",
+		  from_kgid_munged(user_ns, opts->fs_gid));
 	if (opts->fmask)
 		seq_printf(m, ",fmask=%04o", ~opts->fs_fmask_inv);
 	if (opts->dmask)
-- 
2.25.1