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Commit d9c9bef1 authored by Miklos Szeredi's avatar Miklos Szeredi Committed by Linus Torvalds
Browse files

ext4: show all mount options 



Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 571beed8

fs/ext4/super.c

+72 −0
Original line number Diff line number Diff line
@@ -596,9 +596,80 @@ static inline void ext4_show_quota_options(struct seq_file *seq, struct super_bl 
#endif

}



/*

 * Show an option if

 *  - it's set to a non-default value OR

 *  - if the per-sb default is different from the global default

 */

static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)

{

	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);



	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))

		seq_puts(seq, ",grpid");

	if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS))

		seq_puts(seq, ",nogrpid");

	if (sbi->s_resuid != EXT4_DEF_RESUID ||

	    le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) {

		seq_printf(seq, ",resuid=%u", sbi->s_resuid);

	}

	if (sbi->s_resgid != EXT4_DEF_RESGID ||

	    le16_to_cpu(es->s_def_resgid) != EXT4_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 == EXT4_ERRORS_PANIC ||

		    def_errors == EXT4_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_EXT4_FS_XATTR

	if (test_opt(sb, XATTR_USER))

		seq_puts(seq, ",user_xattr");

	if (!test_opt(sb, XATTR_USER) &&

	    (def_mount_opts & EXT4_DEFM_XATTR_USER)) {

		seq_puts(seq, ",nouser_xattr");

	}

#endif

#ifdef CONFIG_EXT4_FS_POSIX_ACL

	if (test_opt(sb, POSIX_ACL))

		seq_puts(seq, ",acl");

	if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL))

		seq_puts(seq, ",noacl");

#endif

	if (!test_opt(sb, RESERVATION))

		seq_puts(seq, ",noreservation");

	if (sbi->s_commit_interval) {

		seq_printf(seq, ",commit=%u",

			   (unsigned) (sbi->s_commit_interval / HZ));

	}

	if (test_opt(sb, BARRIER))

		seq_puts(seq, ",barrier=1");

	if (test_opt(sb, NOBH))

		seq_puts(seq, ",nobh");

	if (!test_opt(sb, EXTENTS))

		seq_puts(seq, ",noextents");



	if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)

		seq_puts(seq, ",data=journal");
@@ -1486,6 +1557,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) 
	sbi->s_mount_opt = 0;

	sbi->s_resuid = EXT4_DEF_RESUID;

	sbi->s_resgid = EXT4_DEF_RESGID;

	sbi->s_sb_block = sb_block;



	unlock_kernel();

include/linux/ext4_fs_sb.h

+1 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ struct ext4_sb_info { 
	struct ext4_super_block * s_es;	/* Pointer to the super block in the buffer */

	struct buffer_head ** s_group_desc;

	unsigned long  s_mount_opt;

	ext4_fsblk_t s_sb_block;

	uid_t s_resuid;

	gid_t s_resgid;

	unsigned short s_mount_state;