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authorRonnie Sahlberg <lsahlber@redhat.com>2018-04-13 09:03:19 +1000
committerSteve French <smfrench@gmail.com>2018-04-12 20:32:50 -0500
commit91cb74f5142c14dd921ab2d064b7b128054f9fae (patch)
tree2b919132f80918392ddd2d518dade730a2d6d981 /fs/cifs
parente19b2bc0790a1c25b226815ce132c06274b1ba87 (diff)
downloadlinux-91cb74f5142c14dd921ab2d064b7b128054f9fae.tar.bz2
cifs: Change SMB2_open to return an iov for the error parameter
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/smb2ops.c10
-rw-r--r--fs/cifs/smb2pdu.c10
-rw-r--r--fs/cifs/smb2proto.h2
3 files changed, 13 insertions, 9 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index def84fed3571..b4ae932ea134 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1451,6 +1451,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
+ struct kvec err_iov = {NULL, 0};
struct smb2_err_rsp *err_buf = NULL;
struct smb2_symlink_err_rsp *symlink;
unsigned int sub_len;
@@ -1473,15 +1474,16 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
oparms.fid = &fid;
oparms.reconnect = false;
- rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
+ rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov);
if (!rc || !err_buf) {
kfree(utf16_path);
return -ENOENT;
}
+ err_buf = err_iov.iov_base;
if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
- get_rfc1002_length(err_buf) + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE) {
+ err_iov.iov_len + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE) {
kfree(utf16_path);
return -ENOENT;
}
@@ -1494,13 +1496,13 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
print_len = le16_to_cpu(symlink->PrintNameLength);
print_offset = le16_to_cpu(symlink->PrintNameOffset);
- if (get_rfc1002_length(err_buf) + server->vals->header_preamble_size <
+ if (err_iov.iov_len + server->vals->header_preamble_size <
SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
kfree(utf16_path);
return -ENOENT;
}
- if (get_rfc1002_length(err_buf) + server->vals->header_preamble_size <
+ if (err_iov.iov_len + server->vals->header_preamble_size <
SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
kfree(utf16_path);
return -ENOENT;
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index be44c5c3e77e..8a6921ef2ce1 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1807,7 +1807,7 @@ alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
int
SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
__u8 *oplock, struct smb2_file_all_info *buf,
- struct smb2_err_rsp **err_buf)
+ struct kvec *err_iov)
{
struct smb2_create_req *req;
struct smb2_create_rsp *rsp;
@@ -1947,9 +1947,11 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
if (rc != 0) {
cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
- if (err_buf && rsp)
- *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
- GFP_KERNEL);
+ if (err_iov && rsp) {
+ *err_iov = rsp_iov;
+ resp_buftype = CIFS_NO_BUFFER;
+ rsp = NULL;
+ }
goto creat_exit;
}
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index cbcce3f7e86f..8ba24a95db71 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -122,7 +122,7 @@ extern int SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon);
extern int SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms,
__le16 *path, __u8 *oplock,
struct smb2_file_all_info *buf,
- struct smb2_err_rsp **err_buf);
+ struct kvec *err_iov);
extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid, u32 opcode,
bool is_fsctl, char *in_data, u32 indatalen,