With current hardware clusters faced with the trouble of creating enough inodes on partitions. Lustre has 0-size files to store some information about files. Current MDS disk sizes allow to store large amount of such files, but EXT4 limits this number to ~4 billions. Lustre FS has features like DNE to distribute metadata over many targets (disks), but disks are used not effectively. It would be great to have ability to store more then ~4 billions inodes on one EXT4 file system. This patches add 1) dirdata feature, that allow to store additional data in direntry 2) code that uses dirdata to store high bits of 64bit inode number. This is second version of the patch set. Changes since v1: * code style fixes * changed feature name to INCOMPAT_INODE64 * inode counters correct swab * metadata checksum code gets high inode part * mount-time check to prevent mounting a filesystem with 64-bit inodes on a 32-bit kernel Andreas Dilger (1): ext4: dirdata feature Artem Blagodarenko (1): ext4: Add 64-bit inode number support fs/ext2/super.c | 6 +- fs/ext4/dir.c | 21 ++++--- fs/ext4/ext4.h | 167 ++++++++++++++++++++++++++++++++++++++++++++++------- fs/ext4/ialloc.c | 19 ++++--- fs/ext4/inline.c | 18 +++--- fs/ext4/namei.c | 171 ++++++++++++++++++++++++++++++++++++++++++++----------- fs/ext4/resize.c | 8 +-- fs/ext4/super.c | 17 ++++-- 8 files changed, 341 insertions(+), 86 deletions(-) -- 2.13.5 (Apple Git-94)
