smb3: Move the flush out of smb2_copychunk_range() into its callers

Move the flush out of smb2_copychunk_range() into its callers.  This will
allow the pagecache to be invalidated between the flush and the operation
in smb3_collapse_range() and smb3_insert_range().

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index f54d8bf..e9fb338 100644 (file)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -1219,6 +1219,8 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,
 
        cifs_dbg(FYI, "copychunk range\n");
 
+       filemap_write_and_wait(src_inode->i_mapping);
+
        if (!src_file->private_data || !dst_file->private_data) {
                rc = -EBADF;
                cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 4810bd6..674cf18 100644 (file)
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1600,17 +1600,8 @@ smb2_copychunk_range(const unsigned int xid,
        int chunks_copied = 0;
        bool chunk_sizes_updated = false;
        ssize_t bytes_written, total_bytes_written = 0;
-       struct inode *inode;
 
        pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
-
-       /*
-        * We need to flush all unwritten data before we can send the
-        * copychunk ioctl to the server.
-        */
-       inode = d_inode(trgtfile->dentry);
-       filemap_write_and_wait(inode->i_mapping);
-
        if (pcchunk == NULL)
                return -ENOMEM;
 
@@ -3694,6 +3685,8 @@ static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
                goto out;
        }
 
+       filemap_write_and_wait(inode->i_mapping);
+
        rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
                                  i_size_read(inode) - off - len, off);
        if (rc < 0)
@@ -3721,18 +3714,21 @@ static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
        int rc;
        unsigned int xid;
        struct cifsFileInfo *cfile = file->private_data;
+       struct inode *inode = file_inode(file);
        __le64 eof;
        __u64  count;
 
        xid = get_xid();
 
-       if (off >= i_size_read(file->f_inode)) {
+       if (off >= i_size_read(inode)) {
                rc = -EINVAL;
                goto out;
        }
 
-       count = i_size_read(file->f_inode) - off;
-       eof = cpu_to_le64(i_size_read(file->f_inode) + len);
+       count = i_size_read(inode) - off;
+       eof = cpu_to_le64(i_size_read(inode) + len);
+
+       filemap_write_and_wait(inode->i_mapping);
 
        rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
                          cfile->fid.volatile_fid, cfile->pid, &eof);