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authorJiro SEKIBA <jir@unicus.jp>2009-06-24 20:06:34 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-09-14 18:27:13 +0900
commitb58a285ba40866e22e5876969a8f796a74311d9e (patch)
tree9a667fdb99c0429c1871da626cb7589dec54adb7 /fs/nilfs2
parent143511046765504d2d1be633efd710f8d84e0407 (diff)
downloadop-kernel-dev-b58a285ba40866e22e5876969a8f796a74311d9e.zip
op-kernel-dev-b58a285ba40866e22e5876969a8f796a74311d9e.tar.gz
nilfs2: implement nilfs_show_options to display mount options in /proc/mounts
This is a patch to display mount options in procfs. Mount options will show up in the /proc/mounts as other fs does. ... /dev/sda6 /mnt nilfs2 ro,relatime,barrier=off,cp=3,order=strict 0 0 ... Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2')
-rw-r--r--fs/nilfs2/super.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 151964f..ebbefb9 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -50,6 +50,8 @@
#include <linux/writeback.h>
#include <linux/kobject.h>
#include <linux/exportfs.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
#include "nilfs.h"
#include "mdt.h"
#include "alloc.h"
@@ -529,6 +531,26 @@ static int nilfs_statfs(struct dentry *dentry, struct kstatfs *buf)
return 0;
}
+static int nilfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
+{
+ struct super_block *sb = vfs->mnt_sb;
+ struct nilfs_sb_info *sbi = NILFS_SB(sb);
+
+ if (!nilfs_test_opt(sbi, BARRIER))
+ seq_printf(seq, ",barrier=off");
+ if (nilfs_test_opt(sbi, SNAPSHOT))
+ seq_printf(seq, ",cp=%llu",
+ (unsigned long long int)sbi->s_snapshot_cno);
+ if (nilfs_test_opt(sbi, ERRORS_RO))
+ seq_printf(seq, ",errors=remount-ro");
+ if (nilfs_test_opt(sbi, ERRORS_PANIC))
+ seq_printf(seq, ",errors=panic");
+ if (nilfs_test_opt(sbi, STRICT_ORDER))
+ seq_printf(seq, ",order=strict");
+
+ return 0;
+}
+
static struct super_operations nilfs_sops = {
.alloc_inode = nilfs_alloc_inode,
.destroy_inode = nilfs_destroy_inode,
@@ -546,7 +568,7 @@ static struct super_operations nilfs_sops = {
.remount_fs = nilfs_remount,
.clear_inode = nilfs_clear_inode,
/* .umount_begin */
- /* .show_options */
+ .show_options = nilfs_show_options
};
static struct inode *
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