ext4: Add multi block allocator for ext4
Signed-off-by: Alex Tomas <alex@clusterfs.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 64fc7f1..3a51ffc4 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -503,6 +503,7 @@
struct ext4_super_block *es = sbi->s_es;
int i;
+ ext4_mb_release(sb);
ext4_ext_release(sb);
ext4_xattr_put_super(sb);
jbd2_journal_destroy(sbi->s_journal);
@@ -569,6 +570,8 @@
ei->i_block_alloc_info = NULL;
ei->vfs_inode.i_version = 1;
memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache));
+ INIT_LIST_HEAD(&ei->i_prealloc_list);
+ spin_lock_init(&ei->i_prealloc_lock);
return &ei->vfs_inode;
}
@@ -881,6 +884,7 @@
Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version,
+ Opt_mballoc, Opt_nomballoc, Opt_stripe,
};
static match_table_t tokens = {
@@ -935,6 +939,9 @@
{Opt_extents, "extents"},
{Opt_noextents, "noextents"},
{Opt_i_version, "i_version"},
+ {Opt_mballoc, "mballoc"},
+ {Opt_nomballoc, "nomballoc"},
+ {Opt_stripe, "stripe=%u"},
{Opt_err, NULL},
{Opt_resize, "resize"},
};
@@ -1284,6 +1291,19 @@
set_opt(sbi->s_mount_opt, I_VERSION);
sb->s_flags |= MS_I_VERSION;
break;
+ case Opt_mballoc:
+ set_opt(sbi->s_mount_opt, MBALLOC);
+ break;
+ case Opt_nomballoc:
+ clear_opt(sbi->s_mount_opt, MBALLOC);
+ break;
+ case Opt_stripe:
+ if (match_int(&args[0], &option))
+ return 0;
+ if (option < 0)
+ return 0;
+ sbi->s_stripe = option;
+ break;
default:
printk (KERN_ERR
"EXT4-fs: Unrecognized mount option \"%s\" "
@@ -1742,6 +1762,34 @@
return (has_super + ext4_group_first_block_no(sb, bg));
}
+/**
+ * ext4_get_stripe_size: Get the stripe size.
+ * @sbi: In memory super block info
+ *
+ * If we have specified it via mount option, then
+ * use the mount option value. If the value specified at mount time is
+ * greater than the blocks per group use the super block value.
+ * If the super block value is greater than blocks per group return 0.
+ * Allocator needs it be less than blocks per group.
+ *
+ */
+static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi)
+{
+ unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride);
+ unsigned long stripe_width =
+ le32_to_cpu(sbi->s_es->s_raid_stripe_width);
+
+ if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group)
+ return sbi->s_stripe;
+
+ if (stripe_width <= sbi->s_blocks_per_group)
+ return stripe_width;
+
+ if (stride <= sbi->s_blocks_per_group)
+ return stride;
+
+ return 0;
+}
static int ext4_fill_super (struct super_block *sb, void *data, int silent)
__releases(kernel_sem)
@@ -2091,6 +2139,8 @@
sbi->s_rsv_window_head.rsv_goal_size = 0;
ext4_rsv_window_add(sb, &sbi->s_rsv_window_head);
+ sbi->s_stripe = ext4_get_stripe_size(sbi);
+
/*
* set up enough so that it can read an inode
*/
@@ -2250,6 +2300,7 @@
"writeback");
ext4_ext_init(sb);
+ ext4_mb_init(sb, needs_recovery);
lock_kernel();
return 0;
@@ -3232,9 +3283,15 @@
static int __init init_ext4_fs(void)
{
- int err = init_ext4_xattr();
+ int err;
+
+ err = init_ext4_mballoc();
if (err)
return err;
+
+ err = init_ext4_xattr();
+ if (err)
+ goto out2;
err = init_inodecache();
if (err)
goto out1;
@@ -3246,6 +3303,8 @@
destroy_inodecache();
out1:
exit_ext4_xattr();
+out2:
+ exit_ext4_mballoc();
return err;
}
@@ -3254,6 +3313,7 @@
unregister_filesystem(&ext4dev_fs_type);
destroy_inodecache();
exit_ext4_xattr();
+ exit_ext4_mballoc();
}
MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");