linux-ext4 - [PATCH] ext4: Fix ext4_show_options to show the correct mount options.

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Date:	Wed, 24 Oct 2007 22:17:21 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	linux-ext4@...r.kernel.org
Cc:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: [PATCH] ext4: Fix ext4_show_options to show the correct mount options.

We need to look at the default value and make sure
the mount options are not set via default value
before showing them via ext4_show_options

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
---
 fs/ext4/super.c |   28 ++++++++++++++++------------
 1 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f1f70ce..5300c17 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -668,18 +668,20 @@ static inline void ext4_show_quota_options(struct seq_file *seq, struct super_bl
  */
 static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
 {
+	int def_errors;
+	unsigned long def_mount_opts;
 	struct super_block *sb = vfs->mnt_sb;
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	struct ext4_super_block *es = sbi->s_es;
-	unsigned long def_mount_opts;
 
 	def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
+	def_errors     = le16_to_cpu(es->s_errors);
 
 	if (sbi->s_sb_block != 1)
 		seq_printf(seq, ",sb=%llu", sbi->s_sb_block);
 	if (test_opt(sb, MINIX_DF))
 		seq_puts(seq, ",minixdf");
-	if (test_opt(sb, GRPID))
+	if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS))
 		seq_puts(seq, ",grpid");
 	if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS))
 		seq_puts(seq, ",nogrpid");
@@ -692,25 +694,24 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
 		seq_printf(seq, ",resgid=%u", sbi->s_resgid);
 	}
 	if (test_opt(sb, ERRORS_RO)) {
-		int def_errors = le16_to_cpu(es->s_errors);
-
 		if (def_errors == EXT4_ERRORS_PANIC ||
 		    def_errors == EXT4_ERRORS_CONTINUE) {
 			seq_puts(seq, ",errors=remount-ro");
 		}
 	}
-	if (test_opt(sb, ERRORS_CONT))
+	if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE)
 		seq_puts(seq, ",errors=continue");
-	if (test_opt(sb, ERRORS_PANIC))
+	if (test_opt(sb, ERRORS_PANIC)&& def_errors != EXT4_ERRORS_PANIC)
 		seq_puts(seq, ",errors=panic");
-	if (test_opt(sb, NO_UID32))
+	if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16))
 		seq_puts(seq, ",nouid32");
-	if (test_opt(sb, DEBUG))
+	if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG))
 		seq_puts(seq, ",debug");
 	if (test_opt(sb, OLDALLOC))
 		seq_puts(seq, ",oldalloc");
 #ifdef CONFIG_EXT4_FS_XATTR
-	if (test_opt(sb, XATTR_USER))
+	if (test_opt(sb, XATTR_USER) &&
+	    !(def_mount_opts & EXT4_DEFM_XATTR_USER)) {
 		seq_puts(seq, ",user_xattr");
 	if (!test_opt(sb, XATTR_USER) &&
 	    (def_mount_opts & EXT4_DEFM_XATTR_USER)) {
@@ -718,7 +719,7 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
 	}
 #endif
 #ifdef CONFIG_EXT4_FS_POSIX_ACL
-	if (test_opt(sb, POSIX_ACL))
+	if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL))
 		seq_puts(seq, ",acl");
 	if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL))
 		seq_puts(seq, ",noacl");
@@ -742,6 +743,10 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
 	if (!test_opt(sb, DELALLOC))
 		seq_puts(seq, ",nodelalloc");
 
+	/*
+	 * journal mode get enabled in different ways
+	 * So just print the value even if we didn't specify it
+	 */
 	if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
 		seq_puts(seq, ",data=journal");
 	else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
@@ -750,7 +755,6 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
 		seq_puts(seq, ",data=writeback");
 
 	ext4_show_quota_options(seq, sb);
-
 	return 0;
 }
 
@@ -1145,7 +1149,7 @@ static int parse_options (char *options, struct super_block *sb,
 					return 0;
 				}
 			} else {
-				sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS;
+				clear_opt(sbi->s_mount_opt, DATA_FLAGS);
 				sbi->s_mount_opt |= data_opt;
 			}
 			break;
-- 
1.5.3.4.319.gdd817-dirty

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