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authorJeff Dike <jdike@addtoit.com>2005-06-13 18:52:18 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-13 23:58:43 -0400
commita3c77c67a443e631febf708bb0c376caede31657 (patch)
tree75672c8dec41054de7b635df59a9f014f6a5ad14 /arch/um/drivers/slirp_user.c
parent98fdffccea6cc3fe9dba32c0fcc310bcb5d71529 (diff)
[PATCH] uml: slirp and slip driver cleanups and fixes
This patch merges a lot of duplicated code in the slip and slirp drivers, abstracts out the slip protocol, and makes the slip driver work in 2.6. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/drivers/slirp_user.c')
-rw-r--r--arch/um/drivers/slirp_user.c104
1 files changed, 21 insertions, 83 deletions
diff --git a/arch/um/drivers/slirp_user.c b/arch/um/drivers/slirp_user.c
index c322515c71cc..8d91f663d82c 100644
--- a/arch/um/drivers/slirp_user.c
+++ b/arch/um/drivers/slirp_user.c
@@ -12,7 +12,7 @@
12#include "user.h" 12#include "user.h"
13#include "net_user.h" 13#include "net_user.h"
14#include "slirp.h" 14#include "slirp.h"
15#include "slip_proto.h" 15#include "slip_common.h"
16#include "helper.h" 16#include "helper.h"
17#include "os.h" 17#include "os.h"
18 18
@@ -48,47 +48,32 @@ static int slirp_tramp(char **argv, int fd)
48 return(pid); 48 return(pid);
49} 49}
50 50
51/* XXX This is just a trivial wrapper around os_pipe */
52static int slirp_datachan(int *mfd, int *sfd)
53{
54 int fds[2], err;
55
56 err = os_pipe(fds, 1, 1);
57 if(err < 0){
58 printk("slirp_datachan: Failed to open pipe, err = %d\n", -err);
59 return(err);
60 }
61
62 *mfd = fds[0];
63 *sfd = fds[1];
64 return(0);
65}
66
67static int slirp_open(void *data) 51static int slirp_open(void *data)
68{ 52{
69 struct slirp_data *pri = data; 53 struct slirp_data *pri = data;
70 int sfd, mfd, pid, err; 54 int fds[2], pid, err;
71 55
72 err = slirp_datachan(&mfd, &sfd); 56 err = os_pipe(fds, 1, 1);
73 if(err) 57 if(err)
74 return(err); 58 return(err);
75 59
76 pid = slirp_tramp(pri->argw.argv, sfd); 60 err = slirp_tramp(pri->argw.argv, fds[1]);
77 61 if(err < 0){
78 if(pid < 0){ 62 printk("slirp_tramp failed - errno = %d\n", -err);
79 printk("slirp_tramp failed - errno = %d\n", -pid); 63 goto out;
80 os_close_file(sfd);
81 os_close_file(mfd);
82 return(pid);
83 } 64 }
84 65 pid = err;
85 pri->slave = sfd; 66
86 pri->pos = 0; 67 pri->slave = fds[1];
87 pri->esc = 0; 68 pri->slip.pos = 0;
88 69 pri->slip.esc = 0;
89 pri->pid = pid; 70 pri->pid = err;
90 71
91 return(mfd); 72 return(fds[0]);
73out:
74 os_close_file(fds[0]);
75 os_close_file(fds[1]);
76 return err;
92} 77}
93 78
94static void slirp_close(int fd, void *data) 79static void slirp_close(int fd, void *data)
@@ -129,48 +114,12 @@ static void slirp_close(int fd, void *data)
129 114
130int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri) 115int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri)
131{ 116{
132 int i, n, size, start; 117 return slip_proto_read(fd, buf, len, &pri->slip);
133
134 if(pri->more>0) {
135 i = 0;
136 while(i < pri->more) {
137 size = slip_unesc(pri->ibuf[i++],
138 pri->ibuf,&pri->pos,&pri->esc);
139 if(size){
140 memcpy(buf, pri->ibuf, size);
141 memmove(pri->ibuf, &pri->ibuf[i], pri->more-i);
142 pri->more=pri->more-i;
143 return(size);
144 }
145 }
146 pri->more=0;
147 }
148
149 n = net_read(fd, &pri->ibuf[pri->pos], sizeof(pri->ibuf) - pri->pos);
150 if(n <= 0) return(n);
151
152 start = pri->pos;
153 for(i = 0; i < n; i++){
154 size = slip_unesc(pri->ibuf[start + i],
155 pri->ibuf,&pri->pos,&pri->esc);
156 if(size){
157 memcpy(buf, pri->ibuf, size);
158 memmove(pri->ibuf, &pri->ibuf[start+i+1], n-(i+1));
159 pri->more=n-(i+1);
160 return(size);
161 }
162 }
163 return(0);
164} 118}
165 119
166int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri) 120int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri)
167{ 121{
168 int actual, n; 122 return slip_proto_write(fd, buf, len, &pri->slip);
169
170 actual = slip_esc(buf, pri->obuf, len);
171 n = net_write(fd, pri->obuf, actual);
172 if(n < 0) return(n);
173 else return(len);
174} 123}
175 124
176static int slirp_set_mtu(int mtu, void *data) 125static int slirp_set_mtu(int mtu, void *data)
@@ -188,14 +137,3 @@ struct net_user_info slirp_user_info = {
188 .delete_address = NULL, 137 .delete_address = NULL,
189 .max_packet = BUF_SIZE 138 .max_packet = BUF_SIZE
190}; 139};
191
192/*
193 * Overrides for Emacs so that we follow Linus's tabbing style.
194 * Emacs will notice this stuff at the end of the file and automatically
195 * adjust the settings for this buffer only. This must remain at the end
196 * of the file.
197 * ---------------------------------------------------------------------------
198 * Local variables:
199 * c-file-style: "linux"
200 * End:
201 */