diff options
Diffstat (limited to 'fs/cifs/smb1ops.c')
| -rw-r--r-- | fs/cifs/smb1ops.c | 126 |
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 = { |