int
smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const unsigned char *path,
char *pbuf, unsigned int *pbytes_written)
{
int rc;
struct cifs_fid fid;
struct cifs_open_parms oparms;
struct cifs_io_parms io_parms;
int create_options = CREATE_NOT_DIR;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_EXCLUSIVE;
struct kvec iov[2];
if (backup_cred(cifs_sb))
create_options |= CREATE_OPEN_BACKUP_INTENT;
cifs_dbg(FYI, "%s: path: %s\n", __func__, path);
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
oparms.tcon = tcon;
oparms.cifs_sb = cifs_sb;
oparms.desired_access = GENERIC_WRITE;
oparms.create_options = create_options;
oparms.disposition = FILE_CREATE;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
if (rc) {
kfree(utf16_path);
return rc;
}
io_parms.netfid = fid.netfid;
io_parms.pid = current->tgid;
io_parms.tcon = tcon;
io_parms.offset = 0;
io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
io_parms.persistent_fid = fid.persistent_fid;
io_parms.volatile_fid = fid.volatile_fid;
/* iov[0] is reserved for smb header */
iov[1].iov_base = pbuf;
iov[1].iov_len = CIFS_MF_SYMLINK_FILE_SIZE;
rc = SMB2_write(xid, &io_parms, pbytes_written, iov, 1);
/* Make sure we wrote all of the symlink data */
if ((rc == 0) && (*pbytes_written != CIFS_MF_SYMLINK_FILE_SIZE))
rc = -EIO;
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
kfree(utf16_path);
return rc;
}
static int
smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path,
__u32 desired_access, __u32 create_disposition,
__u32 file_attributes, __u32 create_options,
void *data, int command)
{
int rc, tmprc = 0;
u64 persistent_fid, volatile_fid;
__le16 *utf16_path;
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
desired_access, create_disposition, file_attributes,
create_options);
if (rc) {
kfree(utf16_path);
return rc;
}
switch (command) {
case SMB2_OP_DELETE:
break;
case SMB2_OP_QUERY_INFO:
tmprc = SMB2_query_info(xid, tcon, persistent_fid,
volatile_fid,
(struct smb2_file_all_info *)data);
break;
case SMB2_OP_MKDIR:
/*
* Directories are created through parameters in the
* SMB2_open() call.
*/
break;
default:
cERROR(1, "Invalid command");
break;
}
rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
if (tmprc)
rc = tmprc;
kfree(utf16_path);
return rc;
}
static int
smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path,
__u32 desired_access, __u32 create_disposition,
__u32 create_options, void *data, int command)
{
int rc, tmprc = 0;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
oparms.tcon = tcon;
oparms.desired_access = desired_access;
oparms.share_access = FILE_SHARE_ALL;
oparms.disposition = create_disposition;
oparms.create_options = create_options;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
if (rc) {
kfree(utf16_path);
return rc;
}
switch (command) {
case SMB2_OP_DELETE:
break;
case SMB2_OP_QUERY_INFO:
tmprc = SMB2_query_info(xid, tcon, fid.persistent_fid,
fid.volatile_fid,
(struct smb2_file_all_info *)data);
break;
case SMB2_OP_MKDIR:
/*
* Directories are created through parameters in the
* SMB2_open() call.
*/
break;
case SMB2_OP_RENAME:
tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
fid.volatile_fid, (__le16 *)data);
break;
case SMB2_OP_HARDLINK:
tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
fid.volatile_fid, (__le16 *)data);
break;
case SMB2_OP_SET_EOF:
tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
fid.volatile_fid, current->tgid,
(__le64 *)data, false);
break;
case SMB2_OP_SET_INFO:
tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
fid.volatile_fid,
(FILE_BASIC_INFO *)data);
break;
default:
cifs_dbg(VFS, "Invalid command\n");
break;
}
rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
if (tmprc)
rc = tmprc;
kfree(utf16_path);
return rc;
}
int
smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const unsigned char *path,
char *pbuf, unsigned int *pbytes_read)
{
int rc;
struct cifs_fid fid;
struct cifs_open_parms oparms;
struct cifs_io_parms io_parms;
int buf_type = CIFS_NO_BUFFER;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_II;
struct smb2_file_all_info *pfile_info = NULL;
oparms.tcon = tcon;
oparms.cifs_sb = cifs_sb;
oparms.desired_access = GENERIC_READ;
oparms.create_options = CREATE_NOT_DIR;
if (backup_cred(cifs_sb))
oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
oparms.disposition = FILE_OPEN;
oparms.fid = &fid;
oparms.reconnect = false;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (utf16_path == NULL)
return -ENOMEM;
pfile_info = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
GFP_KERNEL);
if (pfile_info == NULL) {
kfree(utf16_path);
return -ENOMEM;
}
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, pfile_info, NULL);
if (rc)
goto qmf_out_open_fail;
if (pfile_info->EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
/* it's not a symlink */
rc = -ENOENT; /* Is there a better rc to return? */
goto qmf_out;
}
io_parms.netfid = fid.netfid;
io_parms.pid = current->tgid;
io_parms.tcon = tcon;
io_parms.offset = 0;
io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
io_parms.persistent_fid = fid.persistent_fid;
io_parms.volatile_fid = fid.volatile_fid;
rc = SMB2_read(xid, &io_parms, pbytes_read, &pbuf, &buf_type);
qmf_out:
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
qmf_out_open_fail:
kfree(utf16_path);
kfree(pfile_info);
return rc;
}
