From: Jan Kara <jack@suse.cz>
Date: Wed, 21 Feb 2018 16:27:44 +0000 (+0100)
Subject: udf: Ignore [ug]id=ignore mount options
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=70260e44750356fecb40ff5fcb0f91bcc911ab5f;p=openwrt%2Fstaging%2Fblogic.git

udf: Ignore [ug]id=ignore mount options

Currently uid=ignore and gid=ignore make no sense without uid=<number>
and gid=<number> respectively as they result in all files having invalid
uid / gid which then doesn't allow even root to modify files and thus
causes confusion. And since commit ca76d2d8031f "UDF: fix UID and GID
mount option ignorance" (from over 10 years ago) uid=<number> overrides
all uids on disk as uid=ignore does. So just silently ignore uid=ignore
mount option.

Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
---

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index c23744d5ae5c..9021c15cec17 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1402,13 +1402,11 @@ reread:
 	read_lock(&sbi->s_cred_lock);
 	i_uid_write(inode, le32_to_cpu(fe->uid));
 	if (!uid_valid(inode->i_uid) ||
-	    UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
 	    UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
 		inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
 
 	i_gid_write(inode, le32_to_cpu(fe->gid));
 	if (!gid_valid(inode->i_gid) ||
-	    UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
 	    UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
 		inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
 
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 28ee2ac2503d..4d671be50059 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -348,12 +348,8 @@ static int udf_show_options(struct seq_file *seq, struct dentry *root)
 		seq_puts(seq, ",shortad");
 	if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
 		seq_puts(seq, ",uid=forget");
-	if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
-		seq_puts(seq, ",uid=ignore");
 	if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
 		seq_puts(seq, ",gid=forget");
-	if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
-		seq_puts(seq, ",gid=ignore");
 	if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
 		seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
 	if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
@@ -609,14 +605,12 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
 			uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
 			break;
 #endif
-		case Opt_uignore:
-			uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
-			break;
 		case Opt_uforget:
 			uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
 			break;
+		case Opt_uignore:
 		case Opt_gignore:
-			uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
+			/* These options are superseeded by uid=<number> */
 			break;
 		case Opt_gforget:
 			uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index 68c9f1d618f5..9dcb475fc74e 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -23,14 +23,12 @@
 #define UDF_FLAG_NLS_MAP		9
 #define UDF_FLAG_UTF8			10
 #define UDF_FLAG_UID_FORGET     11    /* save -1 for uid to disk */
-#define UDF_FLAG_UID_IGNORE     12    /* use sb uid instead of on disk uid */
-#define UDF_FLAG_GID_FORGET     13
-#define UDF_FLAG_GID_IGNORE     14
-#define UDF_FLAG_UID_SET	15
-#define UDF_FLAG_GID_SET	16
-#define UDF_FLAG_SESSION_SET	17
-#define UDF_FLAG_LASTBLOCK_SET	18
-#define UDF_FLAG_BLOCKSIZE_SET	19
+#define UDF_FLAG_GID_FORGET     12
+#define UDF_FLAG_UID_SET	13
+#define UDF_FLAG_GID_SET	14
+#define UDF_FLAG_SESSION_SET	15
+#define UDF_FLAG_LASTBLOCK_SET	16
+#define UDF_FLAG_BLOCKSIZE_SET	17
 
 #define UDF_PART_FLAG_UNALLOC_BITMAP	0x0001
 #define UDF_PART_FLAG_UNALLOC_TABLE	0x0002