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cifs: Fix FALLOC_FL_ZERO_RANGE by setting i_size if EOF moved

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commit 83d5518b124dfd605f10a68128482c839a239f9d upstream.

Fix the cifs filesystem implementations of FALLOC_FL_ZERO_RANGE, in
smb3_zero_range(), to set i_size after extending the file on the server.

Fixes: 72c419d9b0 ("cifs: fix smb3_zero_range so it can expand the file-size when required")
Cc: stable@vger.kernel.org
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: 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: linux-mm@kvack.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Howells 2023-11-29 16:56:17 +00:00 • committed by Greg Kroah-Hartman
parent c6114c8459
commit 6406cce4b2
1 changed files with 8 additions and 2 deletions
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10
fs/smb/client/smb2ops.c
View file

@ -3424,6 +3424,7 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
struct inode *inode = file_inode(file);
struct cifsInodeInfo *cifsi = CIFS_I(inode);
struct cifsFileInfo *cfile = file->private_data;
unsigned long long new_size;
long rc;
unsigned int xid;
__le64 eof;
@ -3454,10 +3455,15 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
/*
* do we also need to change the size of the file?
*/
if (keep_size == false && i_size_read(inode) < offset + len) {
eof = cpu_to_le64(offset + len);
new_size = offset + len;
if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
eof = cpu_to_le64(new_size);
rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, cfile->pid, &eof);
if (rc >= 0) {
truncate_setsize(inode, new_size);
fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
}
}
zero_range_exit: