path: root/fs/ext4/migrate.c
diff options
authorAndreas Dilger <adilger@sun.com>2009-06-13 11:45:35 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-06-13 11:45:35 -0400
commit11013911daea4820147ae6d7094dd7c6894e8651 (patch)
treef8e9f9d2058e0dfc826d4df3d88a7eb18a56b3f3 /fs/ext4/migrate.c
parentf157a4aa98a18bd3817a72bea90d48494e2586e7 (diff)
ext4: teach the inode allocator to use a goal inode number
Enhance the inode allocator to take a goal inode number as a paremeter; if it is specified, it takes precedence over Orlov or parent directory inode allocation algorithms. The extents migration function uses the goal inode number so that the extent trees allocated the migration function use the correct flex_bg. In the future, the goal inode functionality will also be used to allocate an adjacent inode for the extended attributes. Also, for testing purposes the goal inode number can be specified via /sys/fs/{dev}/inode_goal. This can be useful for testing inode allocation beyond 2^32 blocks on very large filesystems. Signed-off-by: Andreas Dilger <adilger@sun.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/migrate.c')
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index 80d075b8aea..313a50b3974 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -458,6 +458,7 @@ int ext4_ext_migrate(struct inode *inode)
struct inode *tmp_inode = NULL;
struct list_blocks_struct lb;
unsigned long max_entries;
+ __u32 goal;
* If the filesystem does not support extents, or the inode
@@ -483,8 +484,10 @@ int ext4_ext_migrate(struct inode *inode)
retval = PTR_ERR(handle);
return retval;
+ goal = (((inode->i_ino - 1) / EXT4_INODES_PER_GROUP(inode->i_sb)) *
+ EXT4_INODES_PER_GROUP(inode->i_sb)) + 1;
tmp_inode = ext4_new_inode(handle, inode->i_sb->s_root->d_inode,
- S_IFREG, 0);
+ S_IFREG, 0, goal);
if (IS_ERR(tmp_inode)) {
retval = -ENOMEM;