Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=93d44cb275f3eba720617a8c5b00d51a8e0e9049
Commit: 93d44cb275f3eba720617a8c5b00d51a8e0e9049
Parent: e57aa839cea13852e07ecb495692b602b11136c9
Author: Miklos Szeredi <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 16 23:26:26 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed Oct 17 08:42:48 2007 -0700
ext2: show all mount options
Using mtab is problematic for various reasons, one of them is that
unprivileged mounts won't turn up in there. So we want to get rid of it,
and
use /proc/mounts instead.
But most filesystems are lazy, and are not showing all mount options. Which
means, that without mtab, the user won't be able to see some or all of the
options.
It would be nice if the generic code could remember the mount options, and
show them without the need to add extra code to filesystems. But this is
not
easy, because different filesystems handle mount options given options, and
not tough the rest. This is not taken into account by mount(8) either, so
/etc/mtab will be broken in this case.
This series fixes up ->show_options() in ext[234].
Signed-off-by: Miklos Szeredi <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
fs/ext2/super.c | 61 ++++++++++++++++++++++++++++++++++++++++++-
include/linux/ext2_fs_sb.h | 1 +
2 files changed, 60 insertions(+), 2 deletions(-)
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 04bc96c..3e78af2 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -203,10 +203,66 @@ static void ext2_clear_inode(struct inode *inode)
static int ext2_show_options(struct seq_file *seq, struct vfsmount *vfs)
{
- struct ext2_sb_info *sbi = EXT2_SB(vfs->mnt_sb);
+ struct super_block *sb = vfs->mnt_sb;
+ struct ext2_sb_info *sbi = EXT2_SB(sb);
+ struct ext2_super_block *es = sbi->s_es;
+ unsigned long def_mount_opts;
+
+ def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
- if (sbi->s_mount_opt & EXT2_MOUNT_GRPID)
+ if (sbi->s_sb_block != 1)
+ seq_printf(seq, ",sb=%lu", sbi->s_sb_block);
+ if (test_opt(sb, MINIX_DF))
+ seq_puts(seq, ",minixdf");
+ if (test_opt(sb, GRPID))
seq_puts(seq, ",grpid");
+ if (!test_opt(sb, GRPID) && (def_mount_opts & EXT2_DEFM_BSDGROUPS))
+ seq_puts(seq, ",nogrpid");
+ if (sbi->s_resuid != EXT2_DEF_RESUID ||
+ le16_to_cpu(es->s_def_resuid) != EXT2_DEF_RESUID) {
+ seq_printf(seq, ",resuid=%u", sbi->s_resuid);
+ }
+ if (sbi->s_resgid != EXT2_DEF_RESGID ||
+ le16_to_cpu(es->s_def_resgid) != EXT2_DEF_RESGID) {
+ seq_printf(seq, ",resgid=%u", sbi->s_resgid);
+ }
+ if (test_opt(sb, ERRORS_CONT)) {
+ int def_errors = le16_to_cpu(es->s_errors);
+
+ if (def_errors == EXT2_ERRORS_PANIC ||
+ def_errors == EXT2_ERRORS_RO) {
+ seq_puts(seq, ",errors=continue");
+ }
+ }
+ if (test_opt(sb, ERRORS_RO))
+ seq_puts(seq, ",errors=remount-ro");
+ if (test_opt(sb, ERRORS_PANIC))
+ seq_puts(seq, ",errors=panic");
+ if (test_opt(sb, NO_UID32))
+ seq_puts(seq, ",nouid32");
+ if (test_opt(sb, DEBUG))
+ seq_puts(seq, ",debug");
+ if (test_opt(sb, OLDALLOC))
+ seq_puts(seq, ",oldalloc");
+
+#ifdef CONFIG_EXT2_FS_XATTR
+ if (test_opt(sb, XATTR_USER))
+ seq_puts(seq, ",user_xattr");
+ if (!test_opt(sb, XATTR_USER) &&
+ (def_mount_opts & EXT2_DEFM_XATTR_USER)) {
+ seq_puts(seq, ",nouser_xattr");
+ }
+#endif
+
+#ifdef CONFIG_EXT2_FS_POSIX_ACL
+ if (test_opt(sb, POSIX_ACL))
+ seq_puts(seq, ",acl");
+ if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT2_DEFM_ACL))
+ seq_puts(seq, ",noacl");
+#endif
+
+ if (test_opt(sb, NOBH))
+ seq_puts(seq, ",nobh");
#if defined(CONFIG_QUOTA)
if (sbi->s_mount_opt & EXT2_MOUNT_USRQUOTA)
@@ -659,6 +715,7 @@ static int ext2_fill_super(struct super_block *sb, void
*data, int silent)
if (!sbi)
return -ENOMEM;
sb->s_fs_info = sbi;
+ sbi->s_sb_block = sb_block;
/*
* See what the current blocksize for the device is, and
diff --git a/include/linux/ext2_fs_sb.h b/include/linux/ext2_fs_sb.h
index d149f29..199ef37 100644
--- a/include/linux/ext2_fs_sb.h
+++ b/include/linux/ext2_fs_sb.h
@@ -39,6 +39,7 @@ struct ext2_sb_info {
struct ext2_super_block * s_es; /* Pointer to the super block in the
buffer */
struct buffer_head ** s_group_desc;
unsigned long s_mount_opt;
+ unsigned long s_sb_block;
uid_t s_resuid;
gid_t s_resgid;
unsigned short s_mount_state;
-
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