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Subject[PATCH 37/49] ext4: Fix ext4_show_options to show the correct mount options.
Date
From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

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@linux.vnet.ibm.com>
---
fs/ext4/super.c | 26 +++++++++++++++-----------
1 files changed, 15 insertions(+), 11 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index aa22acd..64fc7f1 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -665,18 +665,20 @@ 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");
@@ -689,25 +691,24 @@ 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_EXT4DEV_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)) {
@@ -715,7 +716,7 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
}
#endif
#ifdef CONFIG_EXT4DEV_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");
@@ -735,6 +736,10 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
if (test_opt(sb, I_VERSION))
seq_puts(seq, ",i_version");

+ /*
+ * 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)
@@ -743,7 +748,6 @@ 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;
}

--
1.5.4.rc3.31.g1271-dirty


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