cifs: implement CIFSCreateMFSymLink() (8713d01d) · Commits · 戴 / test

fs/cifs/link.c

+45 −0

Original line number	Diff line number	Diff line
		@@ -133,6 +133,51 @@ CIFSFormatMFSymlink(u8 buf, unsigned int buf_len, const char link_str)
		return 0;
		}

		static int
		CIFSCreateMFSymLink(const int xid, struct cifsTconInfo *tcon,
		const char fromName, const char toName,
		const struct nls_table *nls_codepage, int remap)
		{
		int rc;
		int oplock = 0;
		__u16 netfid = 0;
		u8 *buf;
		unsigned int bytes_written = 0;

		buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL);
		if (!buf)
		return -ENOMEM;

		rc = CIFSFormatMFSymlink(buf, CIFS_MF_SYMLINK_FILE_SIZE, toName);
		if (rc != 0) {
		kfree(buf);
		return rc;
		}

		rc = CIFSSMBOpen(xid, tcon, fromName, FILE_CREATE, GENERIC_WRITE,
		CREATE_NOT_DIR, &netfid, &oplock, NULL,
		nls_codepage, remap);
		if (rc != 0) {
		kfree(buf);
		return rc;
		}

		rc = CIFSSMBWrite(xid, tcon, netfid,
		CIFS_MF_SYMLINK_FILE_SIZE /* length */,
		0 /* offset */,
		&bytes_written, buf, NULL, 0);
		CIFSSMBClose(xid, tcon, netfid);
		kfree(buf);
		if (rc != 0)
		return rc;

		if (bytes_written != CIFS_MF_SYMLINK_FILE_SIZE)
		return -EIO;

		return 0;
		}

		static int
		CIFSQueryMFSymLink(const int xid, struct cifsTconInfo *tcon,
		const unsigned char searchName, char *symlinkinfo,
		const struct nls_table *nls_codepage, int remap)