Blame view
fs/compat.c
3.21 KB
d2912cb15 treewide: Replace... |
1 |
// SPDX-License-Identifier: GPL-2.0-only |
1da177e4c Linux-2.6.12-rc2 |
2 3 4 5 6 7 8 9 10 11 |
/* * linux/fs/compat.c * * Kernel compatibililty routines for e.g. 32 bit syscall support * on 64 bit kernels. * * Copyright (C) 2002 Stephen Rothwell, IBM Corporation * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs |
a2531293d update email address |
12 |
* Copyright (C) 2003 Pavel Machek (pavel@ucw.cz) |
1da177e4c Linux-2.6.12-rc2 |
13 |
*/ |
1da177e4c Linux-2.6.12-rc2 |
14 |
#include <linux/compat.h> |
9a9947bf7 [PATCH] Add 32-bi... |
15 |
#include <linux/nfs4_mount.h> |
1da177e4c Linux-2.6.12-rc2 |
16 |
#include <linux/syscalls.h> |
5a0e3ad6a include cleanup: ... |
17 |
#include <linux/slab.h> |
7c0f6ba68 Replace <asm/uacc... |
18 |
#include <linux/uaccess.h> |
07f3f05c1 [PATCH] BLOCK: Mo... |
19 |
#include "internal.h" |
9f72949f6 [PATCH] Add psele... |
20 |
|
9a9947bf7 [PATCH] Add 32-bi... |
21 22 |
struct compat_nfs_string { compat_uint_t len; |
5fc3e624a [PATCH] NFS4: Don... |
23 |
compat_uptr_t data; |
9a9947bf7 [PATCH] Add 32-bi... |
24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 |
}; static inline void compat_nfs_string(struct nfs_string *dst, struct compat_nfs_string *src) { dst->data = compat_ptr(src->data); dst->len = src->len; } struct compat_nfs4_mount_data_v1 { compat_int_t version; compat_int_t flags; compat_int_t rsize; compat_int_t wsize; compat_int_t timeo; compat_int_t retrans; compat_int_t acregmin; compat_int_t acregmax; compat_int_t acdirmin; compat_int_t acdirmax; struct compat_nfs_string client_addr; struct compat_nfs_string mnt_path; struct compat_nfs_string hostname; compat_uint_t host_addrlen; |
5fc3e624a [PATCH] NFS4: Don... |
48 |
compat_uptr_t host_addr; |
9a9947bf7 [PATCH] Add 32-bi... |
49 50 |
compat_int_t proto; compat_int_t auth_flavourlen; |
5fc3e624a [PATCH] NFS4: Don... |
51 |
compat_uptr_t auth_flavours; |
9a9947bf7 [PATCH] Add 32-bi... |
52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 |
}; static int do_nfs4_super_data_conv(void *raw_data) { int version = *(compat_uint_t *) raw_data; if (version == 1) { struct compat_nfs4_mount_data_v1 *raw = raw_data; struct nfs4_mount_data *real = raw_data; /* copy the fields backwards */ real->auth_flavours = compat_ptr(raw->auth_flavours); real->auth_flavourlen = raw->auth_flavourlen; real->proto = raw->proto; real->host_addr = compat_ptr(raw->host_addr); real->host_addrlen = raw->host_addrlen; compat_nfs_string(&real->hostname, &raw->hostname); compat_nfs_string(&real->mnt_path, &raw->mnt_path); compat_nfs_string(&real->client_addr, &raw->client_addr); real->acdirmax = raw->acdirmax; real->acdirmin = raw->acdirmin; real->acregmax = raw->acregmax; real->acregmin = raw->acregmin; real->retrans = raw->retrans; real->timeo = raw->timeo; real->wsize = raw->wsize; real->rsize = raw->rsize; real->flags = raw->flags; real->version = raw->version; } |
9a9947bf7 [PATCH] Add 32-bi... |
82 83 84 |
return 0; } |
9a9947bf7 [PATCH] Add 32-bi... |
85 |
#define NFS4_NAME "nfs4" |
1da177e4c Linux-2.6.12-rc2 |
86 |
|
932602e23 fs/compat: conver... |
87 88 89 90 |
COMPAT_SYSCALL_DEFINE5(mount, const char __user *, dev_name, const char __user *, dir_name, const char __user *, type, compat_ulong_t, flags, const void __user *, data) |
1da177e4c Linux-2.6.12-rc2 |
91 |
{ |
eca6f534e fs: fix overflow ... |
92 |
char *kernel_type; |
b40ef8696 saner calling con... |
93 |
void *options; |
eca6f534e fs: fix overflow ... |
94 |
char *kernel_dev; |
1da177e4c Linux-2.6.12-rc2 |
95 |
int retval; |
b8850d1fa fs: namespace: su... |
96 97 98 |
kernel_type = copy_mount_string(type); retval = PTR_ERR(kernel_type); if (IS_ERR(kernel_type)) |
1da177e4c Linux-2.6.12-rc2 |
99 |
goto out; |
b8850d1fa fs: namespace: su... |
100 101 102 |
kernel_dev = copy_mount_string(dev_name); retval = PTR_ERR(kernel_dev); if (IS_ERR(kernel_dev)) |
5e6123f34 vfs: move getname... |
103 |
goto out1; |
1da177e4c Linux-2.6.12-rc2 |
104 |
|
b40ef8696 saner calling con... |
105 106 107 |
options = copy_mount_options(data); retval = PTR_ERR(options); if (IS_ERR(options)) |
5e6123f34 vfs: move getname... |
108 |
goto out2; |
1da177e4c Linux-2.6.12-rc2 |
109 |
|
b40ef8696 saner calling con... |
110 |
if (kernel_type && options) { |
f0ac2abcc ncpfs: remove com... |
111 |
if (!strcmp(kernel_type, NFS4_NAME)) { |
b40ef8696 saner calling con... |
112 113 |
retval = -EINVAL; if (do_nfs4_super_data_conv(options)) |
5e6123f34 vfs: move getname... |
114 |
goto out3; |
1da177e4c Linux-2.6.12-rc2 |
115 116 |
} } |
b40ef8696 saner calling con... |
117 |
retval = do_mount(kernel_dev, dir_name, kernel_type, flags, options); |
1da177e4c Linux-2.6.12-rc2 |
118 |
|
1da177e4c Linux-2.6.12-rc2 |
119 |
out3: |
b40ef8696 saner calling con... |
120 |
kfree(options); |
1da177e4c Linux-2.6.12-rc2 |
121 |
out2: |
5e6123f34 vfs: move getname... |
122 |
kfree(kernel_dev); |
1da177e4c Linux-2.6.12-rc2 |
123 |
out1: |
eca6f534e fs: fix overflow ... |
124 |
kfree(kernel_type); |
1da177e4c Linux-2.6.12-rc2 |
125 126 127 |
out: return retval; } |