1 #include "defs.h"
2
3 #define MS_RDONLY 1 /* Mount read-only */
4 #define MS_NOSUID 2 /* Ignore suid and sgid bits */
5 #define MS_NODEV 4 /* Disallow access to device special files */
6 #define MS_NOEXEC 8 /* Disallow program execution */
7 #define MS_SYNCHRONOUS 16 /* Writes are synced at once */
8 #define MS_REMOUNT 32 /* Alter flags of a mounted FS */
9 #define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
10 #define MS_DIRSYNC 128 /* Directory modifications are synchronous */
11 #define MS_NOATIME 1024 /* Do not update access times. */
12 #define MS_NODIRATIME 2048 /* Do not update directory access times */
13 #define MS_BIND 4096
14 #define MS_MOVE 8192
15 #define MS_REC 16384
16 #define MS_SILENT 32768
17 #define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
18 #define MS_UNBINDABLE (1<<17) /* change to unbindable */
19 #define MS_PRIVATE (1<<18) /* change to private */
20 #define MS_SLAVE (1<<19) /* change to slave */
21 #define MS_SHARED (1<<20) /* change to shared */
22 #define MS_RELATIME (1<<21)
23 #define MS_KERNMOUNT (1<<22)
24 #define MS_I_VERSION (1<<23)
25 #define MS_STRICTATIME (1<<24)
26 #define MS_NOSEC (1<<28)
27 #define MS_BORN (1<<29)
28 #define MS_ACTIVE (1<<30)
29 #define MS_NOUSER (1<<31)
30 #define MS_MGC_VAL 0xc0ed0000 /* Magic flag number */
31 #define MS_MGC_MSK 0xffff0000 /* Magic flag mask */
32
33 #include "xlat/mount_flags.h"
34
SYS_FUNC(mount)35 SYS_FUNC(mount)
36 {
37 if (entering(tcp)) {
38 int ignore_type = 0, ignore_data = 0;
39 unsigned long flags = tcp->u_arg[3];
40
41 /* Discard magic */
42 if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
43 flags &= ~MS_MGC_MSK;
44
45 if (flags & MS_REMOUNT)
46 ignore_type = 1;
47 else if (flags & (MS_BIND | MS_MOVE))
48 ignore_type = ignore_data = 1;
49
50 printpath(tcp, tcp->u_arg[0]);
51 tprints(", ");
52
53 printpath(tcp, tcp->u_arg[1]);
54 tprints(", ");
55
56 if (ignore_type && tcp->u_arg[2])
57 tprintf("%#lx", tcp->u_arg[2]);
58 else
59 printstr(tcp, tcp->u_arg[2], -1);
60 tprints(", ");
61
62 printflags(mount_flags, tcp->u_arg[3], "MS_???");
63 tprints(", ");
64
65 if (ignore_data && tcp->u_arg[4])
66 tprintf("%#lx", tcp->u_arg[4]);
67 else
68 printstr(tcp, tcp->u_arg[4], -1);
69 }
70 return 0;
71 }
72