tree 319e1044e271aeb31ad14847f369776ac5db74db
parent ae4d537211ff250a8c23c4f1227c4276cd2508ab
author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> 1221325578 -0400
committer Theodore Ts'o <tytso@mit.edu> 1221325578 -0400

ext4: Properly update i_disksize.

With delayed allocation we use i_data_sem to update i_disksize.  We need
to update i_disksize only if the new size specified is greater than the
current value and we need to make sure we don't race with other
i_disksize update.  With delayed allocation we will switch to the
write_begin function for non-delayed allocation if we are low on free
blocks.  This means the write_begin function for non-delayed allocation
also needs to use the same locking.

We also need to check and update i_disksize even if the new size is less
that inode.i_size because of delayed allocation.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>