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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/um/drivers/slirp_user.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/um/drivers/slirp_user.c')
-rw-r--r-- | kernel/arch/um/drivers/slirp_user.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/kernel/arch/um/drivers/slirp_user.c b/kernel/arch/um/drivers/slirp_user.c new file mode 100644 index 000000000..c999d187a --- /dev/null +++ b/kernel/arch/um/drivers/slirp_user.c @@ -0,0 +1,125 @@ +/* + * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * Licensed under the GPL. + */ + +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <sys/wait.h> +#include <net_user.h> +#include <os.h> +#include "slirp.h" + +static int slirp_user_init(void *data, void *dev) +{ + struct slirp_data *pri = data; + + pri->dev = dev; + return 0; +} + +struct slirp_pre_exec_data { + int stdin; + int stdout; +}; + +static void slirp_pre_exec(void *arg) +{ + struct slirp_pre_exec_data *data = arg; + + if (data->stdin != -1) + dup2(data->stdin, 0); + if (data->stdout != -1) + dup2(data->stdout, 1); +} + +static int slirp_tramp(char **argv, int fd) +{ + struct slirp_pre_exec_data pe_data; + int pid; + + pe_data.stdin = fd; + pe_data.stdout = fd; + pid = run_helper(slirp_pre_exec, &pe_data, argv); + + return pid; +} + +static int slirp_open(void *data) +{ + struct slirp_data *pri = data; + int fds[2], pid, err; + + err = os_pipe(fds, 1, 1); + if (err) + return err; + + err = slirp_tramp(pri->argw.argv, fds[1]); + if (err < 0) { + printk(UM_KERN_ERR "slirp_tramp failed - errno = %d\n", -err); + goto out; + } + pid = err; + + pri->slave = fds[1]; + pri->slip.pos = 0; + pri->slip.esc = 0; + pri->pid = err; + + return fds[0]; +out: + close(fds[0]); + close(fds[1]); + return err; +} + +static void slirp_close(int fd, void *data) +{ + struct slirp_data *pri = data; + int err; + + close(fd); + close(pri->slave); + + pri->slave = -1; + + if (pri->pid<1) { + printk(UM_KERN_ERR "slirp_close: no child process to shut " + "down\n"); + return; + } + +#if 0 + if (kill(pri->pid, SIGHUP)<0) { + printk(UM_KERN_ERR "slirp_close: sending hangup to %d failed " + "(%d)\n", pri->pid, errno); + } +#endif + err = helper_wait(pri->pid); + if (err < 0) + return; + + pri->pid = -1; +} + +int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri) +{ + return slip_proto_read(fd, buf, len, &pri->slip); +} + +int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri) +{ + return slip_proto_write(fd, buf, len, &pri->slip); +} + +const struct net_user_info slirp_user_info = { + .init = slirp_user_init, + .open = slirp_open, + .close = slirp_close, + .remove = NULL, + .add_address = NULL, + .delete_address = NULL, + .mtu = BUF_SIZE, + .max_packet = BUF_SIZE, +}; |