cifs: Fix missing set of remote_i_size
Occasionally, the generic/001 xfstest will fail indicating corruption in
one of the copy chains when run on cifs against a server that supports
FSCTL_DUPLICATE_EXTENTS_TO_FILE (eg. Samba with a share on btrfs). The
problem is that the remote_i_size value isn't updated by cifs_setsize()
when called by smb2_duplicate_extents(), but i_size *is*.
This may cause cifs_remap_file_range() to then skip the bit after calling
->duplicate_extents() that sets sizes.
Fix this by calling netfs_resize_file() in smb2_duplicate_extents() before
calling cifs_setsize() to set i_size.
This means we don't then need to call netfs_resize_file() upon return from
->duplicate_extents(), but we also fix the test to compare against the pre-dup
inode size.
[Note that this goes back before the addition of remote_i_size with the
netfs_inode struct. It should probably have been setting cifsi->server_eof
previously.]
Fixes: cfc63fc812
("smb3: fix cached file size problems in duplicate extents (reflink)")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steve French <sfrench@samba.org>
cc: Paulo Alcantara <pc@manguebit.com>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
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@ -1226,7 +1226,7 @@ static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
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struct cifsFileInfo *smb_file_src = src_file->private_data;
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struct cifsFileInfo *smb_file_target = dst_file->private_data;
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struct cifs_tcon *target_tcon, *src_tcon;
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unsigned long long destend, fstart, fend, new_size;
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unsigned long long destend, fstart, fend, old_size, new_size;
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unsigned int xid;
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int rc;
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@ -1293,6 +1293,7 @@ static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
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goto unlock;
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if (fend > target_cifsi->netfs.zero_point)
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target_cifsi->netfs.zero_point = fend + 1;
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old_size = target_cifsi->netfs.remote_i_size;
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/* Discard all the folios that overlap the destination region. */
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cifs_dbg(FYI, "about to discard pages %llx-%llx\n", fstart, fend);
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@ -1305,9 +1306,8 @@ static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
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if (target_tcon->ses->server->ops->duplicate_extents) {
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rc = target_tcon->ses->server->ops->duplicate_extents(xid,
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smb_file_src, smb_file_target, off, len, destoff);
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if (rc == 0 && new_size > i_size_read(target_inode)) {
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if (rc == 0 && new_size > old_size) {
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truncate_setsize(target_inode, new_size);
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netfs_resize_file(&target_cifsi->netfs, new_size, true);
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fscache_resize_cookie(cifs_inode_cookie(target_inode),
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new_size);
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}
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@ -2028,6 +2028,7 @@ smb2_duplicate_extents(const unsigned int xid,
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* size will be queried on next revalidate, but it is important
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* to make sure that file's cached size is updated immediately
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*/
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netfs_resize_file(netfs_inode(inode), dest_off + len, true);
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cifs_setsize(inode, dest_off + len);
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}
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rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
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