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libext2fs: set the large_file feature flag when setting i_size > 2GB 

If someone tries to write a file that is larger than 2GB, we need to
set the large_file feature flag to affirm that i_size_hi can hold
meaningful contents.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
debian-1.42.9
Darrick J. Wong 2013-09-30 18:27:28 -07:00 committed by Theodore Ts'o
parent 7320cb7106
commit 92a7b0d2e3
1 changed files with 12 additions and 0 deletions
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12
lib/ext2fs/fileio.c
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@ -389,6 +389,18 @@ errcode_t ext2fs_file_set_size2(ext2_file_t file, ext2_off64_t size)
old_truncate = ((old_size + file->fs->blocksize - 1) >>
EXT2_BLOCK_SIZE_BITS(file->fs->super)) + 1;
/* If we're writing a large file, set the large_file flag */
if (LINUX_S_ISREG(file->inode.i_mode) &&
EXT2_I_SIZE(&file->inode) > 0x7FFFFFFULL &&
(!EXT2_HAS_RO_COMPAT_FEATURE(file->fs->super,
EXT2_FEATURE_RO_COMPAT_LARGE_FILE) ||
file->fs->super->s_rev_level == EXT2_GOOD_OLD_REV)) {
file->fs->super->s_feature_ro_compat |=
EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
ext2fs_update_dynamic_rev(file->fs);
ext2fs_mark_super_dirty(file->fs);
}
file->inode.i_size = size & 0xffffffff;
file->inode.i_size_high = (size >> 32);
if (file->ino) {