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Date: Mon, 9 Apr 2007 14:14:41 -0400
From: Jeff Dike <jdike@...toit.com>
To: Andrew Morton <akpm@...l.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 3/4] UML - Tidy libc code
This patch lays some groundwork for the next one, which converts calls
to os_{read,write}_file into {read,write}, by doing some tidying in
the affected areas.
do_not_aio gets restructured to make the final result a bit cleaner.
There are also whitespace and other formatting fixes, fixes in error
messages, and a typo fix.
Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
--
arch/um/os-Linux/aio.c | 20 ++++++--------------
arch/um/os-Linux/drivers/ethertap_user.c | 10 +++++++---
arch/um/os-Linux/helper.c | 9 ++++++---
arch/um/os-Linux/process.c | 29 +++++++++++++++--------------
arch/um/os-Linux/sigio.c | 7 ++++---
arch/um/os-Linux/skas/process.c | 2 +-
arch/um/os-Linux/tty_log.c | 16 ++++++++--------
7 files changed, 47 insertions(+), 46 deletions(-)
Index: linux-2.6.21-mm/arch/um/os-Linux/aio.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/aio.c 2007-04-09 13:32:23.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/aio.c 2007-04-09 13:35:21.000000000 -0400
@@ -146,28 +146,21 @@ static int aio_thread(void *arg)
static int do_not_aio(struct aio_thread_req *req)
{
char c;
+ unsigned long long actual;
int err;
+ actual = lseek64(req->io_fd, req->offset, SEEK_SET);
+ if(actual != req->offset)
+ return -errno;
+
switch(req->type){
case AIO_READ:
- err = os_seek_file(req->io_fd, req->offset);
- if(err)
- goto out;
-
err = os_read_file(req->io_fd, req->buf, req->len);
break;
case AIO_WRITE:
- err = os_seek_file(req->io_fd, req->offset);
- if(err)
- goto out;
-
err = os_write_file(req->io_fd, req->buf, req->len);
break;
case AIO_MMAP:
- err = os_seek_file(req->io_fd, req->offset);
- if(err)
- goto out;
-
err = os_read_file(req->io_fd, &c, sizeof(c));
break;
default:
@@ -176,7 +169,6 @@ static int do_not_aio(struct aio_thread_
break;
}
-out:
return err;
}
@@ -207,7 +199,7 @@ static int not_aio_thread(void *arg)
}
err = do_not_aio(&req);
reply = ((struct aio_thread_reply) { .data = req.aio,
- .err = err });
+ .err = err });
err = os_write_file(req.aio->reply_fd, &reply, sizeof(reply));
if(err != sizeof(reply))
printk("not_aio_thread - write failed, fd = %d, "
Index: linux-2.6.21-mm/arch/um/os-Linux/drivers/ethertap_user.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/drivers/ethertap_user.c 2007-04-09 13:32:23.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/drivers/ethertap_user.c 2007-04-09 13:32:48.000000000 -0400
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2001 Lennert Buytenhek (buytenh@....org) and
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@....org) and
* James Leu (jleu@...dspring.net).
* Copyright (C) 2001 by various other people who didn't put their name here.
* Licensed under the GPL.
@@ -49,8 +49,11 @@ static void etap_change(int op, unsigned
memcpy(change.addr, addr, sizeof(change.addr));
memcpy(change.netmask, netmask, sizeof(change.netmask));
n = os_write_file(fd, &change, sizeof(change));
- if(n != sizeof(change))
+ if(n != sizeof(change)){
printk("etap_change - request failed, err = %d\n", -n);
+ return;
+ }
+
output = um_kmalloc(UM_KERN_PAGE_SIZE);
if(output == NULL)
printk("etap_change : Failed to allocate output buffer\n");
@@ -116,7 +119,8 @@ static int etap_tramp(char *dev, char *g
pe_data.data_me = data_me;
pid = run_helper(etap_pre_exec, &pe_data, args, NULL);
- if(pid < 0) err = pid;
+ if(pid < 0)
+ err = pid;
os_close_file(data_remote);
os_close_file(control_remote);
n = os_read_file(control_me, &c, sizeof(c));
Index: linux-2.6.21-mm/arch/um/os-Linux/helper.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/helper.c 2007-04-09 13:32:23.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/helper.c 2007-04-09 13:32:48.000000000 -0400
@@ -34,7 +34,8 @@ static int helper_child(void *arg)
if (data->pre_exec != NULL)
(*data->pre_exec)(data->pre_data);
errval = execvp_noalloc(data->buf, argv[0], argv);
- printk("helper_child - execvp of '%s' failed - errno = %d\n", argv[0], -errval);
+ printk("helper_child - execvp of '%s' failed - errno = %d\n", argv[0],
+ -errval);
os_write_file(data->fd, &errval, sizeof(errval));
kill(os_getpid(), SIGKILL);
return 0;
@@ -87,8 +88,10 @@ int run_helper(void (*pre_exec)(void *),
close(fds[1]);
fds[1] = -1;
- /* Read the errno value from the child, if the exec failed, or get 0 if
- * the exec succeeded because the pipe fd was set as close-on-exec. */
+ /*
+ * Read the errno value from the child, if the exec failed, or get 0 if
+ * the exec succeeded because the pipe fd was set as close-on-exec.
+ */
n = os_read_file(fds[0], &ret, sizeof(ret));
if (n == 0) {
ret = pid;
Index: linux-2.6.21-mm/arch/um/os-Linux/process.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/process.c 2007-04-09 13:32:23.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/process.c 2007-04-09 13:32:48.000000000 -0400
@@ -40,14 +40,14 @@ unsigned long os_process_pc(int pid)
if(fd < 0){
printk("os_process_pc - couldn't open '%s', err = %d\n",
proc_stat, -fd);
- return(ARBITRARY_ADDR);
+ return ARBITRARY_ADDR;
}
err = os_read_file(fd, buf, sizeof(buf));
if(err < 0){
printk("os_process_pc - couldn't read '%s', err = %d\n",
proc_stat, -err);
os_close_file(fd);
- return(ARBITRARY_ADDR);
+ return ARBITRARY_ADDR;
}
os_close_file(fd);
pc = ARBITRARY_ADDR;
@@ -56,7 +56,7 @@ unsigned long os_process_pc(int pid)
"%*d %*d %*d %*d %*d %lu", &pc) != 1){
printk("os_process_pc - couldn't find pc in '%s'\n", buf);
}
- return(pc);
+ return pc;
}
int os_process_parent(int pid)
@@ -65,13 +65,14 @@ int os_process_parent(int pid)
char data[256];
int parent, n, fd;
- if(pid == -1) return(-1);
+ if(pid == -1)
+ return -1;
snprintf(stat, sizeof(stat), "/proc/%d/stat", pid);
fd = os_open_file(stat, of_read(OPENFLAGS()), 0);
if(fd < 0){
printk("Couldn't open '%s', err = %d\n", stat, -fd);
- return(FAILURE_PID);
+ return FAILURE_PID;
}
n = os_read_file(fd, data, sizeof(data));
@@ -79,7 +80,7 @@ int os_process_parent(int pid)
if(n < 0){
printk("Couldn't read '%s', err = %d\n", stat, -n);
- return(FAILURE_PID);
+ return FAILURE_PID;
}
parent = FAILURE_PID;
@@ -87,7 +88,7 @@ int os_process_parent(int pid)
if(n != 1)
printk("Failed to scan '%s'\n", data);
- return(parent);
+ return parent;
}
void os_stop_process(int pid)
@@ -145,7 +146,7 @@ void os_usr1_process(int pid)
int os_getpid(void)
{
- return(syscall(__NR_getpid));
+ return syscall(__NR_getpid);
}
int os_getpgrp(void)
@@ -165,8 +166,8 @@ int os_map_memory(void *virt, int fd, un
loc = mmap64((void *) virt, len, prot, MAP_SHARED | MAP_FIXED,
fd, off);
if(loc == MAP_FAILED)
- return(-errno);
- return(0);
+ return -errno;
+ return 0;
}
int os_protect_memory(void *addr, unsigned long len, int r, int w, int x)
@@ -175,8 +176,8 @@ int os_protect_memory(void *addr, unsign
(x ? PROT_EXEC : 0));
if(mprotect(addr, len, prot) < 0)
- return(-errno);
- return(0);
+ return -errno;
+ return 0;
}
int os_unmap_memory(void *addr, int len)
@@ -185,8 +186,8 @@ int os_unmap_memory(void *addr, int len)
err = munmap(addr, len);
if(err < 0)
- return(-errno);
- return(0);
+ return -errno;
+ return 0;
}
#ifndef MADV_REMOVE
Index: linux-2.6.21-mm/arch/um/os-Linux/sigio.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/sigio.c 2007-04-09 13:32:23.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/sigio.c 2007-04-09 13:32:48.000000000 -0400
@@ -461,15 +461,16 @@ static void tty_output(int master, int s
while(os_write_file(master, buf, sizeof(buf)) > 0) ;
if(errno != EAGAIN)
- panic("check_sigio : write failed, errno = %d\n", errno);
+ panic("tty_output : write failed, errno = %d\n", errno);
while(((n = os_read_file(slave, buf, sizeof(buf))) > 0) && !got_sigio) ;
if(got_sigio){
printk("Yes\n");
pty_output_sigio = 1;
}
- else if(n == -EAGAIN) printk("No, enabling workaround\n");
- else panic("check_sigio : read failed, err = %d\n", n);
+ else if(n == -EAGAIN)
+ printk("No, enabling workaround\n");
+ else panic("tty_output : read failed, err = %d\n", n);
}
static void tty_close(int master, int slave)
Index: linux-2.6.21-mm/arch/um/os-Linux/skas/process.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/skas/process.c 2007-04-09 13:32:23.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/skas/process.c 2007-04-09 13:32:48.000000000 -0400
@@ -409,7 +409,7 @@ int copy_context_skas0(unsigned long new
/*
* This is used only, if stub pages are needed, while proc_mm is
- * availabl. Opening /proc/mm creates a new mm_context, which lacks
+ * available. Opening /proc/mm creates a new mm_context, which lacks
* the stub-pages. Thus, we map them using /proc/mm-fd
*/
void map_stub_pages(int fd, unsigned long code,
Index: linux-2.6.21-mm/arch/um/os-Linux/tty_log.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/tty_log.c 2007-04-09 13:32:23.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/tty_log.c 2007-04-09 13:32:48.000000000 -0400
@@ -55,7 +55,7 @@ int open_tty_log(void *tty, void *curren
.usec = tv.tv_usec } );
os_write_file(tty_log_fd, &data, sizeof(data));
os_write_file(tty_log_fd, ¤t_tty, data.len);
- return(tty_log_fd);
+ return tty_log_fd;
}
sprintf(buf, "%s/%0u-%0u", tty_log_dir, (unsigned int) tv.tv_sec,
@@ -67,7 +67,7 @@ int open_tty_log(void *tty, void *curren
printk("open_tty_log : couldn't open '%s', errno = %d\n",
buf, -fd);
}
- return(fd);
+ return fd;
}
void close_tty_log(int fd, void *tty)
@@ -101,18 +101,18 @@ static int log_chunk(int fd, const char
n = os_write_file(fd, chunk, try);
if(n != try) {
if(n < 0)
- return(n);
- return(-EIO);
+ return n;
+ return -EIO;
}
if(missed != 0)
- return(-EFAULT);
+ return -EFAULT;
len -= try;
total += try;
buf += try;
}
- return(total);
+ return total;
}
int write_tty_log(int fd, const char *buf, int len, void *tty, int is_read)
@@ -133,7 +133,7 @@ int write_tty_log(int fd, const char *bu
os_write_file(tty_log_fd, &data, sizeof(data));
}
- return(log_chunk(fd, buf, len));
+ return log_chunk(fd, buf, len);
}
void log_exec(char **argv, void *tty)
@@ -179,7 +179,7 @@ extern void register_tty_logger(int (*op
static int register_logger(void)
{
register_tty_logger(open_tty_log, write_tty_log, close_tty_log);
- return(0);
+ return 0;
}
__uml_initcall(register_logger);
-
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