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-rw-r--r--fs/cifs/smb1ops.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index f0ce27c3c6e4..c711f1f39bf2 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -1027,6 +1027,131 @@ cifs_can_echo(struct TCP_Server_Info *server)
return false;
}
+static int
+cifs_make_node(unsigned int xid, struct inode *inode,
+ struct dentry *dentry, struct cifs_tcon *tcon,
+ char *full_path, umode_t mode, dev_t dev)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct inode *newinode = NULL;
+ int rc = -EPERM;
+ int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
+ FILE_ALL_INFO *buf = NULL;
+ struct cifs_io_parms io_parms;
+ __u32 oplock = 0;
+ struct cifs_fid fid;
+ struct cifs_open_parms oparms;
+ unsigned int bytes_written;
+ struct win_dev *pdev;
+ struct kvec iov[2];
+
+ if (tcon->unix_ext) {
+ /*
+ * SMB1 Unix Extensions: requires server support but
+ * works with all special files
+ */
+ struct cifs_unix_set_info_args args = {
+ .mode = mode & ~current_umask(),
+ .ctime = NO_CHANGE_64,
+ .atime = NO_CHANGE_64,
+ .mtime = NO_CHANGE_64,
+ .device = dev,
+ };
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
+ args.uid = current_fsuid();
+ args.gid = current_fsgid();
+ } else {
+ args.uid = INVALID_UID; /* no change */
+ args.gid = INVALID_GID; /* no change */
+ }
+ rc = CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
+ cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ if (rc)
+ goto out;
+
+ rc = cifs_get_inode_info_unix(&newinode, full_path,
+ inode->i_sb, xid);
+
+ if (rc == 0)
+ d_instantiate(dentry, newinode);
+ goto out;
+ }
+
+ /*
+ * SMB1 SFU emulation: should work with all servers, but only
+ * support block and char device (no socket & fifo)
+ */
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
+ goto out;
+
+ if (!S_ISCHR(mode) && !S_ISBLK(mode))
+ goto out;
+
+ cifs_dbg(FYI, "sfu compat create special file\n");
+
+ buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
+ if (buf == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ if (backup_cred(cifs_sb))
+ create_options |= CREATE_OPEN_BACKUP_INTENT;
+
+ oparms.tcon = tcon;
+ oparms.cifs_sb = cifs_sb;
+ oparms.desired_access = GENERIC_WRITE;
+ oparms.create_options = create_options;
+ oparms.disposition = FILE_CREATE;
+ oparms.path = full_path;
+ oparms.fid = &fid;
+ oparms.reconnect = false;
+
+ if (tcon->ses->server->oplocks)
+ oplock = REQ_OPLOCK;
+ else
+ oplock = 0;
+ rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
+ if (rc)
+ goto out;
+
+ /*
+ * BB Do not bother to decode buf since no local inode yet to put
+ * timestamps in, but we can reuse it safely.
+ */
+
+ pdev = (struct win_dev *)buf;
+ io_parms.pid = current->tgid;
+ io_parms.tcon = tcon;
+ io_parms.offset = 0;
+ io_parms.length = sizeof(struct win_dev);
+ iov[1].iov_base = buf;
+ iov[1].iov_len = sizeof(struct win_dev);
+ if (S_ISCHR(mode)) {
+ memcpy(pdev->type, "IntxCHR", 8);
+ pdev->major = cpu_to_le64(MAJOR(dev));
+ pdev->minor = cpu_to_le64(MINOR(dev));
+ rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+ &bytes_written, iov, 1);
+ } else if (S_ISBLK(mode)) {
+ memcpy(pdev->type, "IntxBLK", 8);
+ pdev->major = cpu_to_le64(MAJOR(dev));
+ pdev->minor = cpu_to_le64(MINOR(dev));
+ rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+ &bytes_written, iov, 1);
+ }
+ tcon->ses->server->ops->close(xid, tcon, &fid);
+ d_drop(dentry);
+
+ /* FIXME: add code here to set EAs */
+out:
+ kfree(buf);
+ return rc;
+}
+
+
+
struct smb_version_operations smb1_operations = {
.send_cancel = send_nt_cancel,
.compare_fids = cifs_compare_fids,
@@ -1110,6 +1235,7 @@ struct smb_version_operations smb1_operations = {
.get_acl_by_fid = get_cifs_acl_by_fid,
.set_acl = set_cifs_acl,
#endif /* CIFS_ACL */
+ .make_node = cifs_make_node,
};
struct smb_version_values smb1_values = {