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ext4: remove #ifdef CONFIG_EXT4_INDEX
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CONFIG_EXT4_INDEX is not an exposed config option in the kernel, and it is
unconditionally defined in ext4_fs.h.  tune2fs is already able to turn off
dir indexing, so at this point it's just cluttering up the code.  Remove
it.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Eric Sandeen authored and Theodore Ts'o committed Oct 17, 2007
1 parent f077d0d commit 4074fe3
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Showing 3 changed files with 2 additions and 39 deletions.
7 changes: 0 additions & 7 deletions fs/ext4/dir.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -47,9 +47,7 @@ const struct file_operations ext4_dir_operations = {
.compat_ioctl = ext4_compat_ioctl,
#endif
.fsync = ext4_sync_file, /* BKL held */
#ifdef CONFIG_EXT4_INDEX
.release = ext4_release_dir,
#endif
};


Expand Down Expand Up @@ -107,7 +105,6 @@ static int ext4_readdir(struct file * filp,

sb = inode->i_sb;

#ifdef CONFIG_EXT4_INDEX
if (EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_COMPAT_DIR_INDEX) &&
((EXT4_I(inode)->i_flags & EXT4_INDEX_FL) ||
Expand All @@ -123,7 +120,6 @@ static int ext4_readdir(struct file * filp,
*/
EXT4_I(filp->f_path.dentry->d_inode)->i_flags &= ~EXT4_INDEX_FL;
}
#endif
stored = 0;
offset = filp->f_pos & (sb->s_blocksize - 1);

Expand Down Expand Up @@ -232,7 +228,6 @@ static int ext4_readdir(struct file * filp,
return ret;
}

#ifdef CONFIG_EXT4_INDEX
/*
* These functions convert from the major/minor hash to an f_pos
* value.
Expand Down Expand Up @@ -518,5 +513,3 @@ static int ext4_release_dir (struct inode * inode, struct file * filp)

return 0;
}

#endif
20 changes: 0 additions & 20 deletions fs/ext4/namei.c
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Original file line number Diff line number Diff line change
Expand Up @@ -144,7 +144,6 @@ struct dx_map_entry
u16 size;
};

#ifdef CONFIG_EXT4_INDEX
static inline unsigned dx_get_block (struct dx_entry *entry);
static void dx_set_block (struct dx_entry *entry, unsigned value);
static inline unsigned dx_get_hash (struct dx_entry *entry);
Expand Down Expand Up @@ -766,8 +765,6 @@ static void dx_insert_block(struct dx_frame *frame, u32 hash, u32 block)
dx_set_block(new, block);
dx_set_count(entries, count + 1);
}
#endif


static void ext4_update_dx_flag(struct inode *inode)
{
Expand Down Expand Up @@ -869,7 +866,6 @@ static struct buffer_head * ext4_find_entry (struct dentry *dentry,
name = dentry->d_name.name;
if (namelen > EXT4_NAME_LEN)
return NULL;
#ifdef CONFIG_EXT4_INDEX
if (is_dx(dir)) {
bh = ext4_dx_find_entry(dentry, res_dir, &err);
/*
Expand All @@ -881,7 +877,6 @@ static struct buffer_head * ext4_find_entry (struct dentry *dentry,
return bh;
dxtrace(printk("ext4_find_entry: dx failed, falling back\n"));
}
#endif
nblocks = dir->i_size >> EXT4_BLOCK_SIZE_BITS(sb);
start = EXT4_I(dir)->i_dir_start_lookup;
if (start >= nblocks)
Expand Down Expand Up @@ -957,7 +952,6 @@ static struct buffer_head * ext4_find_entry (struct dentry *dentry,
return ret;
}

#ifdef CONFIG_EXT4_INDEX
static struct buffer_head * ext4_dx_find_entry(struct dentry *dentry,
struct ext4_dir_entry_2 **res_dir, int *err)
{
Expand Down Expand Up @@ -1025,7 +1019,6 @@ static struct buffer_head * ext4_dx_find_entry(struct dentry *dentry,
dx_release (frames);
return NULL;
}
#endif

static struct dentry *ext4_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
{
Expand Down Expand Up @@ -1121,7 +1114,6 @@ static inline void ext4_set_de_type(struct super_block *sb,
de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
}

#ifdef CONFIG_EXT4_INDEX
/*
* Move count entries from end of map between two memory locations.
* Returns pointer to last entry moved.
Expand Down Expand Up @@ -1266,8 +1258,6 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
*error = err;
return NULL;
}
#endif


/*
* Add a new entry into a directory (leaf) block. If de is non-NULL,
Expand Down Expand Up @@ -1364,7 +1354,6 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
return 0;
}

#ifdef CONFIG_EXT4_INDEX
/*
* This converts a one block unindexed directory to a 3 block indexed
* directory, and adds the dentry to the indexed directory.
Expand Down Expand Up @@ -1443,7 +1432,6 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,

return add_dirent_to_buf(handle, dentry, inode, de, bh);
}
#endif

/*
* ext4_add_entry()
Expand All @@ -1464,17 +1452,14 @@ static int ext4_add_entry (handle_t *handle, struct dentry *dentry,
struct ext4_dir_entry_2 *de;
struct super_block * sb;
int retval;
#ifdef CONFIG_EXT4_INDEX
int dx_fallback=0;
#endif
unsigned blocksize;
u32 block, blocks;

sb = dir->i_sb;
blocksize = sb->s_blocksize;
if (!dentry->d_name.len)
return -EINVAL;
#ifdef CONFIG_EXT4_INDEX
if (is_dx(dir)) {
retval = ext4_dx_add_entry(handle, dentry, inode);
if (!retval || (retval != ERR_BAD_DX_DIR))
Expand All @@ -1483,7 +1468,6 @@ static int ext4_add_entry (handle_t *handle, struct dentry *dentry,
dx_fallback++;
ext4_mark_inode_dirty(handle, dir);
}
#endif
blocks = dir->i_size >> sb->s_blocksize_bits;
for (block = 0, offset = 0; block < blocks; block++) {
bh = ext4_bread(handle, dir, block, 0, &retval);
Expand All @@ -1493,11 +1477,9 @@ static int ext4_add_entry (handle_t *handle, struct dentry *dentry,
if (retval != -ENOSPC)
return retval;

#ifdef CONFIG_EXT4_INDEX
if (blocks == 1 && !dx_fallback &&
EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX))
return make_indexed_dir(handle, dentry, inode, bh);
#endif
brelse(bh);
}
bh = ext4_append(handle, dir, &block, &retval);
Expand All @@ -1509,7 +1491,6 @@ static int ext4_add_entry (handle_t *handle, struct dentry *dentry,
return add_dirent_to_buf(handle, dentry, inode, de, bh);
}

#ifdef CONFIG_EXT4_INDEX
/*
* Returns 0 for success, or a negative error value
*/
Expand Down Expand Up @@ -1644,7 +1625,6 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
dx_release(frames);
return err;
}
#endif

/*
* ext4_delete_entry deletes a directory entry by merging it with the
Expand Down
14 changes: 2 additions & 12 deletions include/linux/ext4_fs.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -36,10 +36,6 @@
/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
#define EXT4_MAX_RESERVE_BLOCKS 1027
#define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0
/*
* Always enable hashed directories
*/
#define CONFIG_EXT4_INDEX

/*
* Debug code
Expand Down Expand Up @@ -766,17 +762,11 @@ struct ext4_dir_entry_2 {
* (c) Daniel Phillips, 2001
*/

#ifdef CONFIG_EXT4_INDEX
#define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \
EXT4_FEATURE_COMPAT_DIR_INDEX) && \
#define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \
EXT4_FEATURE_COMPAT_DIR_INDEX) && \
(EXT4_I(dir)->i_flags & EXT4_INDEX_FL))
#define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
#else
#define is_dx(dir) 0
#define EXT4_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT4_LINK_MAX)
#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2)
#endif

/* Legal values for the dx_root hash_version field: */

Expand Down

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