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ext4: remove the I_VERSION mount flag and use the super_block flag instead

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There's no point to have two bits that are set in parallel; so use the
MS_I_VERSION flag that is needed by the VFS anyway, and that way we
free up a bit in sbi->s_mount_opts.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2012-03-02 12:23:11 -05:00
parent ee4a3fcd1d
commit c64db50e76
3 changed files with 2 additions and 4 deletions
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1
fs/ext4/ext4.h
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@ -942,7 +942,6 @@ struct ext4_inode_info {
#define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */
#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */
#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */
#define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */
#define EXT4_MOUNT_MBLK_IO_SUBMIT 0x4000000 /* multi-block io submits */
#define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */
#define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */

2
fs/ext4/inode.c
View file

@ -4322,7 +4322,7 @@ int ext4_mark_iloc_dirty(handle_t *handle,
{
int err = 0;
if (test_opt(inode->i_sb, I_VERSION))
if (IS_I_VERSION(inode))
inode_inc_iversion(inode);
/* the do_update_inode consumes one bh->b_count */

3
fs/ext4/super.c
View file

@ -1125,7 +1125,7 @@ static int ext4_show_options(struct seq_file *seq, struct dentry *root)
seq_puts(seq, ",journal_async_commit");
else if (test_opt(sb, JOURNAL_CHECKSUM))
seq_puts(seq, ",journal_checksum");
if (test_opt(sb, I_VERSION))
if (sb->s_flags & MS_I_VERSION)
seq_puts(seq, ",i_version");
if (!test_opt(sb, DELALLOC) &&
!(def_mount_opts & EXT4_DEFM_NODELALLOC))
@ -1793,7 +1793,6 @@ static int parse_options(char *options, struct super_block *sb,
"Ignoring deprecated bh option");
break;
case Opt_i_version:
set_opt(sb, I_VERSION);
sb->s_flags |= MS_I_VERSION;
break;
case Opt_nodelalloc: