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path: root/fs/cifs/smb2pdu.c
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Diffstat (limited to 'fs/cifs/smb2pdu.c')
-rw-r--r--fs/cifs/smb2pdu.c145
1 files changed, 74 insertions, 71 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 821f21d4ada7..a5009a1c9bce 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -2052,43 +2052,27 @@ err_free_path:
}
int
-SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
- __u8 *oplock, struct smb2_file_all_info *buf,
- struct kvec *err_iov, int *buftype)
+SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock,
+ struct cifs_open_parms *oparms, __le16 *path)
{
- struct smb_rqst rqst;
+ struct TCP_Server_Info *server = tcon->ses->server;
struct smb2_create_req *req;
- struct smb2_create_rsp *rsp;
- struct TCP_Server_Info *server;
- struct cifs_tcon *tcon = oparms->tcon;
- struct cifs_ses *ses = tcon->ses;
- struct kvec iov[5]; /* make sure at least one for each open context */
- struct kvec rsp_iov = {NULL, 0};
- int resp_buftype;
- int uni_path_len;
- __le16 *copy_path = NULL;
- int copy_size;
- int rc = 0;
unsigned int n_iov = 2;
__u32 file_attributes = 0;
- char *dhc_buf = NULL, *lc_buf = NULL, *pc_buf = NULL;
- int flags = 0;
+ int copy_size;
+ int uni_path_len;
unsigned int total_len;
-
- cifs_dbg(FYI, "create/open\n");
-
- if (ses && (ses->server))
- server = ses->server;
- else
- return -EIO;
+ struct kvec *iov = rqst->rq_iov;
+ __le16 *copy_path;
+ int rc;
rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len);
-
if (rc)
return rc;
- if (smb3_encryption_required(tcon))
- flags |= CIFS_TRANSFORM_REQ;
+ iov[0].iov_base = (char *)req;
+ /* -1 since last byte is buf[0] which is sent below (path) */
+ iov[0].iov_len = total_len - 1;
if (oparms->create_options & CREATE_OPTION_READONLY)
file_attributes |= ATTR_READONLY;
@@ -2102,11 +2086,6 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
req->ShareAccess = FILE_SHARE_ALL_LE;
req->CreateDisposition = cpu_to_le32(oparms->disposition);
req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
-
- iov[0].iov_base = (char *)req;
- /* -1 since last byte is buf[0] which is sent below (path) */
- iov[0].iov_len = total_len - 1;
-
req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
/* [MS-SMB2] 2.2.13 NameOffset:
@@ -2124,10 +2103,8 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
&name_len,
tcon->treeName, path);
- if (rc) {
- cifs_small_buf_release(req);
+ if (rc)
return rc;
- }
req->NameLength = cpu_to_le16(name_len * 2);
uni_path_len = copy_size;
path = copy_path;
@@ -2135,18 +2112,16 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
/* MUST set path len (NameLength) to 0 opening root of share */
req->NameLength = cpu_to_le16(uni_path_len - 2);
- if (uni_path_len % 8 != 0) {
- copy_size = roundup(uni_path_len, 8);
- copy_path = kzalloc(copy_size, GFP_KERNEL);
- if (!copy_path) {
- cifs_small_buf_release(req);
- return -ENOMEM;
- }
- memcpy((char *)copy_path, (const char *)path,
- uni_path_len);
- uni_path_len = copy_size;
- path = copy_path;
- }
+ copy_size = uni_path_len;
+ if (copy_size % 8 != 0)
+ copy_size = roundup(copy_size, 8);
+ copy_path = kzalloc(copy_size, GFP_KERNEL);
+ if (!copy_path)
+ return -ENOMEM;
+ memcpy((char *)copy_path, (const char *)path,
+ uni_path_len);
+ uni_path_len = copy_size;
+ path = copy_path;
}
iov[1].iov_len = uni_path_len;
@@ -2161,12 +2136,8 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
else {
rc = add_lease_context(server, iov, &n_iov,
oparms->fid->lease_key, oplock);
- if (rc) {
- cifs_small_buf_release(req);
- kfree(copy_path);
+ if (rc)
return rc;
- }
- lc_buf = iov[n_iov-1].iov_base;
}
if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
@@ -2180,13 +2151,8 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
rc = add_durable_context(iov, &n_iov, oparms,
tcon->use_persistent);
- if (rc) {
- cifs_small_buf_release(req);
- kfree(copy_path);
- kfree(lc_buf);
+ if (rc)
return rc;
- }
- dhc_buf = iov[n_iov-1].iov_base;
}
if (tcon->posix_extensions) {
@@ -2198,23 +2164,63 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
}
rc = add_posix_context(iov, &n_iov, oparms->mode);
- if (rc) {
- cifs_small_buf_release(req);
- kfree(copy_path);
- kfree(lc_buf);
- kfree(dhc_buf);
+ if (rc)
return rc;
- }
- pc_buf = iov[n_iov-1].iov_base;
}
+ rqst->rq_nvec = n_iov;
+ return 0;
+}
+
+/* rq_iov[0] is the request and is released by cifs_small_buf_release().
+ * All other vectors are freed by kfree().
+ */
+void
+SMB2_open_free(struct smb_rqst *rqst)
+{
+ int i;
+
+ cifs_small_buf_release(rqst->rq_iov[0].iov_base);
+ for (i = 1; i < rqst->rq_nvec; i++)
+ kfree(rqst->rq_iov[i].iov_base);
+}
+
+int
+SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
+ __u8 *oplock, struct smb2_file_all_info *buf,
+ struct kvec *err_iov, int *buftype)
+{
+ struct smb_rqst rqst;
+ struct smb2_create_rsp *rsp = NULL;
+ struct TCP_Server_Info *server;
+ struct cifs_tcon *tcon = oparms->tcon;
+ struct cifs_ses *ses = tcon->ses;
+ struct kvec iov[5]; /* make sure at least one for each open context */
+ struct kvec rsp_iov = {NULL, 0};
+ int resp_buftype;
+ int rc = 0;
+ int flags = 0;
+
+ cifs_dbg(FYI, "create/open\n");
+ if (ses && (ses->server))
+ server = ses->server;
+ else
+ return -EIO;
+
+ if (smb3_encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
memset(&rqst, 0, sizeof(struct smb_rqst));
+ memset(&iov, 0, sizeof(iov));
rqst.rq_iov = iov;
- rqst.rq_nvec = n_iov;
+ rqst.rq_nvec = 5;
+
+ rc = SMB2_open_init(tcon, &rqst, oplock, oparms, path);
+ if (rc)
+ goto creat_exit;
rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
&rsp_iov);
- cifs_small_buf_release(req);
rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
if (rc != 0) {
@@ -2251,10 +2257,7 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
else
*oplock = rsp->OplockLevel;
creat_exit:
- kfree(copy_path);
- kfree(lc_buf);
- kfree(dhc_buf);
- kfree(pc_buf);
+ SMB2_open_free(&rqst);
free_rsp_buf(resp_buftype, rsp);
return rc;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 12:06:43 +0000