Commit 3972f260 authored by Eric Sandeen's avatar Eric Sandeen Committed by Josef Bacik

btrfs: update timestamps on truncate()

truncate() vs. ftruncate() differ in the VFS; truncate()
doesn't set (ATTR_CTIME | ATTR_MTIME), and it's up to the
fs to do the timestamp updates if the size changes.
Signed-off-by: default avatarEric Sandeen <sandeen@redhat.com>
Signed-off-by: default avatarJosef Bacik <josef@toxicpanda.com>
parent f2767956
......@@ -88,7 +88,7 @@ static unsigned char btrfs_type_by_mode[S_IFMT >> S_SHIFT] = {
[S_IFLNK >> S_SHIFT] = BTRFS_FT_SYMLINK,
};
static int btrfs_setsize(struct inode *inode, loff_t newsize);
static int btrfs_setsize(struct inode *inode, struct iattr *attr);
static int btrfs_truncate(struct inode *inode);
static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent);
static noinline int cow_file_range(struct inode *inode,
......@@ -3761,16 +3761,27 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
return err;
}
static int btrfs_setsize(struct inode *inode, loff_t newsize)
static int btrfs_setsize(struct inode *inode, struct iattr *attr)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
loff_t oldsize = i_size_read(inode);
loff_t newsize = attr->ia_size;
int mask = attr->ia_valid;
int ret;
if (newsize == oldsize)
return 0;
/*
* The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
* special case where we need to update the times despite not having
* these flags set. For all other operations the VFS set these flags
* explicitly if it wants a timestamp update.
*/
if (newsize != oldsize && (!(mask & (ATTR_CTIME | ATTR_MTIME))))
inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
if (newsize > oldsize) {
truncate_pagecache(inode, oldsize, newsize);
ret = btrfs_cont_expand(inode, oldsize, newsize);
......@@ -3843,7 +3854,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
return err;
if (S_ISREG(inode->i_mode) && (attr->ia_valid & ATTR_SIZE)) {
err = btrfs_setsize(inode, attr->ia_size);
err = btrfs_setsize(inode, attr);
if (err)
return err;
}
......
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