ext4: Add support for 48 bit inode i_blocks.

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Use the __le16 l_i_reserved1 field of the linux2 struct of ext4_inode
to represet the higher 16 bits for i_blocks. With this change max_file
size becomes (2**48 -1 )* 512 bytes.

We add a RO_COMPAT feature to the super block to indicate that inode
have i_blocks represented as a split 48 bits. Super block with this
feature set cannot be mounted read write on a kernel with CONFIG_LSF
disabled.

Super block flag EXT4_FEATURE_RO_COMPAT_HUGE_FILE

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

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This commit is contained in:

Aneesh Kumar K.V 2008-01-28 23:58:26 -05:00 • committed by Theodore Ts'o

parent a48380f769

commit 0fc1b45147

3 changed files with 119 additions and 11 deletions

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58

fs/ext4/inode.c

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62

fs/ext4/super.c

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10

include/linux/ext4_fs.h

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