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fat: truncate inode timestamp updates in setattr

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setattr_copy can't truncate timestamps correctly for
msdos/vfat, so truncate and copy them ourselves.

Link: http://lkml.kernel.org/r/a2b4701b1125573fafaeaae6802050ca86d6f8cc.1538363961.git.sorenson@redhat.com
Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Frank Sorenson 2018-10-30 15:07:01 -07:00 committed by Linus Torvalds
parent cd83f6b194
commit 22ea4eba63
1 changed files with 12 additions and 0 deletions
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12
fs/fat/file.c
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@ -542,6 +542,18 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr)
up_write(&MSDOS_I(inode)->truncate_lock);
}
/*
* setattr_copy can't truncate these appropriately, so we'll
* copy them ourselves
*/
if (attr->ia_valid & ATTR_ATIME)
fat_truncate_time(inode, &attr->ia_atime, S_ATIME);
if (attr->ia_valid & ATTR_CTIME)
fat_truncate_time(inode, &attr->ia_ctime, S_CTIME);
if (attr->ia_valid & ATTR_MTIME)
fat_truncate_time(inode, &attr->ia_mtime, S_MTIME);
attr->ia_valid &= ~(ATTR_ATIME|ATTR_CTIME|ATTR_MTIME);
setattr_copy(inode, attr);
mark_inode_dirty(inode);
out: