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cifs: create SMB2_open_init()/SMB2_open_free() helpers.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Paulo Alcantara <palcantara@suse.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
This commit is contained in:
Ronnie Sahlberg
Steve French
parent
296ecbae7f
commit
1eb9fb5204
2 changed files with 78 additions and 71 deletions
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@ -2052,43 +2052,27 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
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}
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int
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SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
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__u8 *oplock, struct smb2_file_all_info *buf,
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struct kvec *err_iov, int *buftype)
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SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock,
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struct cifs_open_parms *oparms, __le16 *path)
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{
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struct smb_rqst rqst;
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struct TCP_Server_Info *server = tcon->ses->server;
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struct smb2_create_req *req;
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struct smb2_create_rsp *rsp;
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struct TCP_Server_Info *server;
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struct cifs_tcon *tcon = oparms->tcon;
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struct cifs_ses *ses = tcon->ses;
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struct kvec iov[5]; /* make sure at least one for each open context */
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struct kvec rsp_iov = {NULL, 0};
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int resp_buftype;
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int uni_path_len;
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__le16 *copy_path = NULL;
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int copy_size;
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int rc = 0;
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unsigned int n_iov = 2;
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__u32 file_attributes = 0;
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char *dhc_buf = NULL, *lc_buf = NULL, *pc_buf = NULL;
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int flags = 0;
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int copy_size;
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int uni_path_len;
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unsigned int total_len;
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cifs_dbg(FYI, "create/open\n");
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if (ses && (ses->server))
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server = ses->server;
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else
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return -EIO;
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struct kvec *iov = rqst->rq_iov;
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__le16 *copy_path;
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int rc;
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rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
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if (rc)
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return rc;
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if (smb3_encryption_required(tcon))
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flags |= CIFS_TRANSFORM_REQ;
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iov[0].iov_base = (char *)req;
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/* -1 since last byte is buf[0] which is sent below (path) */
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iov[0].iov_len = total_len - 1;
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if (oparms->create_options & CREATE_OPTION_READONLY)
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file_attributes |= ATTR_READONLY;
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@ -2102,11 +2086,6 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
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req->ShareAccess = FILE_SHARE_ALL_LE;
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req->CreateDisposition = cpu_to_le32(oparms->disposition);
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req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
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iov[0].iov_base = (char *)req;
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/* -1 since last byte is buf[0] which is sent below (path) */
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iov[0].iov_len = total_len - 1;
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req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
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/* [MS-SMB2] 2.2.13 NameOffset:
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@ -2124,10 +2103,8 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
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rc = alloc_path_with_tree_prefix(©_path, ©_size,
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&name_len,
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tcon->treeName, path);
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if (rc) {
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cifs_small_buf_release(req);
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if (rc)
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return rc;
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}
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req->NameLength = cpu_to_le16(name_len * 2);
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uni_path_len = copy_size;
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path = copy_path;
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@ -2135,18 +2112,16 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
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uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
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/* MUST set path len (NameLength) to 0 opening root of share */
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req->NameLength = cpu_to_le16(uni_path_len - 2);
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if (uni_path_len % 8 != 0) {
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copy_size = roundup(uni_path_len, 8);
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copy_path = kzalloc(copy_size, GFP_KERNEL);
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if (!copy_path) {
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cifs_small_buf_release(req);
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return -ENOMEM;
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}
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memcpy((char *)copy_path, (const char *)path,
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uni_path_len);
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uni_path_len = copy_size;
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path = copy_path;
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}
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copy_size = uni_path_len;
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if (copy_size % 8 != 0)
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copy_size = roundup(copy_size, 8);
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copy_path = kzalloc(copy_size, GFP_KERNEL);
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if (!copy_path)
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return -ENOMEM;
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memcpy((char *)copy_path, (const char *)path,
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uni_path_len);
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uni_path_len = copy_size;
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path = copy_path;
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}
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iov[1].iov_len = uni_path_len;
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@ -2161,12 +2136,8 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
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else {
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rc = add_lease_context(server, iov, &n_iov,
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oparms->fid->lease_key, oplock);
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if (rc) {
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cifs_small_buf_release(req);
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kfree(copy_path);
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if (rc)
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return rc;
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}
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lc_buf = iov[n_iov-1].iov_base;
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}
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if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
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@ -2180,13 +2151,8 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
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rc = add_durable_context(iov, &n_iov, oparms,
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tcon->use_persistent);
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if (rc) {
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cifs_small_buf_release(req);
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kfree(copy_path);
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kfree(lc_buf);
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if (rc)
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return rc;
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}
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dhc_buf = iov[n_iov-1].iov_base;
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}
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if (tcon->posix_extensions) {
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@ -2198,23 +2164,63 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
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}
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rc = add_posix_context(iov, &n_iov, oparms->mode);
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if (rc) {
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cifs_small_buf_release(req);
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kfree(copy_path);
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kfree(lc_buf);
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kfree(dhc_buf);
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if (rc)
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return rc;
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}
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pc_buf = iov[n_iov-1].iov_base;
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}
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rqst->rq_nvec = n_iov;
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return 0;
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}
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/* rq_iov[0] is the request and is released by cifs_small_buf_release().
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* All other vectors are freed by kfree().
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*/
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void
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SMB2_open_free(struct smb_rqst *rqst)
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{
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int i;
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cifs_small_buf_release(rqst->rq_iov[0].iov_base);
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for (i = 1; i < rqst->rq_nvec; i++)
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kfree(rqst->rq_iov[i].iov_base);
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}
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int
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SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
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__u8 *oplock, struct smb2_file_all_info *buf,
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struct kvec *err_iov, int *buftype)
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{
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struct smb_rqst rqst;
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struct smb2_create_rsp *rsp = NULL;
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struct TCP_Server_Info *server;
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struct cifs_tcon *tcon = oparms->tcon;
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struct cifs_ses *ses = tcon->ses;
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struct kvec iov[5]; /* make sure at least one for each open context */
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struct kvec rsp_iov = {NULL, 0};
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int resp_buftype;
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int rc = 0;
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int flags = 0;
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cifs_dbg(FYI, "create/open\n");
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if (ses && (ses->server))
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server = ses->server;
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else
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return -EIO;
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if (smb3_encryption_required(tcon))
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flags |= CIFS_TRANSFORM_REQ;
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memset(&rqst, 0, sizeof(struct smb_rqst));
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memset(&iov, 0, sizeof(iov));
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rqst.rq_iov = iov;
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rqst.rq_nvec = n_iov;
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rqst.rq_nvec = 5;
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rc = SMB2_open_init(tcon, &rqst, oplock, oparms, path);
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if (rc)
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goto creat_exit;
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rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
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&rsp_iov);
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cifs_small_buf_release(req);
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rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
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if (rc != 0) {
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@ -2251,10 +2257,7 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
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else
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*oplock = rsp->OplockLevel;
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creat_exit:
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kfree(copy_path);
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kfree(lc_buf);
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kfree(dhc_buf);
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kfree(pc_buf);
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SMB2_open_free(&rqst);
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free_rsp_buf(resp_buftype, rsp);
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return rc;
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}
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@ -133,6 +133,10 @@ extern int SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms,
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__le16 *path, __u8 *oplock,
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struct smb2_file_all_info *buf,
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struct kvec *err_iov, int *resp_buftype);
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extern int SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
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__u8 *oplock, struct cifs_open_parms *oparms,
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__le16 *path);
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extern void SMB2_open_free(struct smb_rqst *rqst);
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extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
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u64 persistent_fid, u64 volatile_fid, u32 opcode,
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bool is_fsctl, char *in_data, u32 indatalen,
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