2 #include <linux/types.h>
17 #include <sys/ioctl.h>
18 #include <sys/types.h>
23 #include <linux/auto_fs4.h>
25 #include "include/log.h"
26 #include "include/sys.h"
27 #include "include/timer.h"
28 #include "include/mount.h"
29 #include "include/signal.h"
30 #include "include/ucix.h"
32 int fdin
= 0; /* data coming out of the kernel */
33 int fdout
= 0;/* data going into the kernel */
39 void umount_autofs(void)
41 system_printf("umount %s 2> /dev/null", "/tmp/run/mountd/");
44 static int mount_autofs(void)
48 log_printf("trying to mount %s as the autofs root\n", "/tmp/run/mountd/");
49 if(is_mounted(0, "/tmp/run/mountd/"))
51 log_printf("%s is already mounted\n", "/tmp/run/mountd/");
55 mkdir("/tmp/run/mountd/", 0555);
58 log_printf("failed to get kernel pipe\n");
61 if(system_printf("/bin/mount -t autofs -o fd=%d,pgrp=%u,minproto=5,maxproto=5 \"mountd(pid%u)\" %s",
62 pipefd
[1], (unsigned) getpgrp(), getpid(), "/tmp/run/mountd/") != 0)
64 log_printf("unable to mount autofs on %s\n", "/tmp/run/mountd/");
73 fdin
= open("/tmp/run/mountd/", O_RDONLY
);
79 stat("/tmp/run/mountd/", &st
);
83 static void send_ready(unsigned int wait_queue_token
)
85 if(ioctl(fdin
, AUTOFS_IOC_READY
, wait_queue_token
) < 0)
86 log_printf("failed to report ready to kernel\n");
89 static void send_fail(unsigned int wait_queue_token
)
91 if(ioctl(fdin
, AUTOFS_IOC_FAIL
, wait_queue_token
) < 0)
92 log_printf("failed to report fail to kernel\n");
95 static int autofs_process_request(const struct autofs_v5_packet
*pkt
)
98 log_printf("kernel is requesting a mount -> %s\n", pkt
->name
);
99 chdir("/tmp/run/mountd/");
100 if (lstat(pkt
->name
, &st
) == -1 || (S_ISDIR(st
.st_mode
) && st
.st_dev
== dev
)) {
101 if(!mount_new("/tmp/run/mountd/", (char*)pkt
->name
))
103 send_ready(pkt
->wait_queue_token
);
105 send_fail(pkt
->wait_queue_token
);
106 log_printf("failed to mount %s\n", pkt
->name
);
109 send_ready(pkt
->wait_queue_token
);
116 void expire_proc(void)
118 struct autofs_packet_expire pkt
;
119 while(ioctl(fdin
, AUTOFS_IOC_EXPIRE
, &pkt
) == 0)
120 mount_remove("/tmp/run/mountd/", pkt
.name
);
123 static int fullread(void *ptr
, size_t len
)
125 char *buf
= (char *) ptr
;
128 ssize_t r
= read(fdout
, buf
, len
);
141 static int autofs_in(union autofs_v5_packet_union
*pkt
)
143 struct pollfd fds
[1];
146 fds
[0].events
= POLLIN
;
150 if(poll(fds
, 2, 1000) == -1)
154 log_printf("failed while trying to read packet from kernel\n");
157 if(fds
[0].revents
& POLLIN
)
158 return fullread(pkt
, sizeof(*pkt
));
162 pid_t
autofs_safe_fork(void)
173 void autofs_cleanup_handler(void)
180 void autofs_init(void)
184 struct uci_context
*ctx
;
185 signal_init(autofs_cleanup_handler
);
186 ctx
= ucix_init("mountd");
187 uci_timeout
= ucix_get_option_int(ctx
, "mountd", "mountd", "timeout", 60);
188 p
= ucix_get_option(ctx
, "mountd", "mountd", "path");
191 snprintf(uci_path
, 31, p
);
193 snprintf(uci_path
, 31, "/tmp/mounts/");
195 mkdir("/tmp/run/", 0555);
196 mkdir("/tmp/mounts", 0555);
197 system_printf("rm -rf %s*", uci_path
);
202 if(mount_autofs() < 0)
207 ioctl(fdin
, AUTOFS_IOC_PROTOVER
, &kproto_version
);
208 if(kproto_version
!= 5)
210 log_printf("only kernel protocol version 5 is tested. You have %d.\n",
215 ioctl(fdin
, AUTOFS_IOC_SETTIMEOUT
, &uci_timeout
);
216 timer_add(expire_proc
, 15);
219 int autofs_loop(void)
225 union autofs_v5_packet_union pkt
;
230 log_printf("Got a autofs packet\n");
231 if(pkt
.hdr
.type
== autofs_ptype_missing_indirect
)
232 autofs_process_request(&pkt
.missing_indirect
);
234 log_printf("unknown packet type %d\n", pkt
.hdr
.type
);
238 log_printf("... quitting\n");