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| author |   Jiro SEKIBA <jir@unicus.jp> | 2009-06-24 20:06:34 +0900 |
|---|---|---|
| committer |   Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2009-09-14 18:27:13 +0900 |
| commit | b58a285ba40866e22e5876969a8f796a74311d9e (patch) | |
| tree | 9a667fdb99c0429c1871da626cb7589dec54adb7 | |
| parent | nilfs2: always lookup disk block address before reading metadata block (diff) | |
| download | linux-dev-b58a285ba40866e22e5876969a8f796a74311d9e.tar.xz linux-dev-b58a285ba40866e22e5876969a8f796a74311d9e.zip | |
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>
| -rw-r--r-- | fs/nilfs2/super.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 151964f0de4c..ebbefb9d26c9 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 * |