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-rw-r--r--fs/compat.c138
-rw-r--r--fs/statfs.c140
2 files changed, 140 insertions, 138 deletions
diff --git a/fs/compat.c b/fs/compat.c
index 07cccc0fdd26..4f22a56c6fca 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -137,144 +137,6 @@ COMPAT_SYSCALL_DEFINE2(newfstat, unsigned int, fd,
return error;
}
-static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
-{
-
- if (sizeof ubuf->f_blocks == 4) {
- if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
- kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
- return -EOVERFLOW;
- /* f_files and f_ffree may be -1; it's okay
- * to stuff that into 32 bits */
- if (kbuf->f_files != 0xffffffffffffffffULL
- && (kbuf->f_files & 0xffffffff00000000ULL))
- return -EOVERFLOW;
- if (kbuf->f_ffree != 0xffffffffffffffffULL
- && (kbuf->f_ffree & 0xffffffff00000000ULL))
- return -EOVERFLOW;
- }
- if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
- __put_user(kbuf->f_type, &ubuf->f_type) ||
- __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
- __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
- __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
- __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
- __put_user(kbuf->f_files, &ubuf->f_files) ||
- __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
- __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
- __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
- __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
- __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
- __put_user(kbuf->f_flags, &ubuf->f_flags) ||
- __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
- return -EFAULT;
- return 0;
-}
-
-/*
- * The following statfs calls are copies of code from fs/statfs.c and
- * should be checked against those from time to time
- */
-COMPAT_SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct compat_statfs __user *, buf)
-{
- struct kstatfs tmp;
- int error = user_statfs(pathname, &tmp);
- if (!error)
- error = put_compat_statfs(buf, &tmp);
- return error;
-}
-
-COMPAT_SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct compat_statfs __user *, buf)
-{
- struct kstatfs tmp;
- int error = fd_statfs(fd, &tmp);
- if (!error)
- error = put_compat_statfs(buf, &tmp);
- return error;
-}
-
-static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
-{
- if (sizeof(ubuf->f_bsize) == 4) {
- if ((kbuf->f_type | kbuf->f_bsize | kbuf->f_namelen |
- kbuf->f_frsize | kbuf->f_flags) & 0xffffffff00000000ULL)
- return -EOVERFLOW;
- /* f_files and f_ffree may be -1; it's okay
- * to stuff that into 32 bits */
- if (kbuf->f_files != 0xffffffffffffffffULL
- && (kbuf->f_files & 0xffffffff00000000ULL))
- return -EOVERFLOW;
- if (kbuf->f_ffree != 0xffffffffffffffffULL
- && (kbuf->f_ffree & 0xffffffff00000000ULL))
- return -EOVERFLOW;
- }
- if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
- __put_user(kbuf->f_type, &ubuf->f_type) ||
- __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
- __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
- __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
- __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
- __put_user(kbuf->f_files, &ubuf->f_files) ||
- __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
- __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
- __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
- __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
- __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
- __put_user(kbuf->f_flags, &ubuf->f_flags) ||
- __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
- return -EFAULT;
- return 0;
-}
-
-COMPAT_SYSCALL_DEFINE3(statfs64, const char __user *, pathname, compat_size_t, sz, struct compat_statfs64 __user *, buf)
-{
- struct kstatfs tmp;
- int error;
-
- if (sz != sizeof(*buf))
- return -EINVAL;
-
- error = user_statfs(pathname, &tmp);
- if (!error)
- error = put_compat_statfs64(buf, &tmp);
- return error;
-}
-
-COMPAT_SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, compat_size_t, sz, struct compat_statfs64 __user *, buf)
-{
- struct kstatfs tmp;
- int error;
-
- if (sz != sizeof(*buf))
- return -EINVAL;
-
- error = fd_statfs(fd, &tmp);
- if (!error)
- error = put_compat_statfs64(buf, &tmp);
- return error;
-}
-
-/*
- * This is a copy of sys_ustat, just dealing with a structure layout.
- * Given how simple this syscall is that apporach is more maintainable
- * than the various conversion hacks.
- */
-COMPAT_SYSCALL_DEFINE2(ustat, unsigned, dev, struct compat_ustat __user *, u)
-{
- struct compat_ustat tmp;
- struct kstatfs sbuf;
- int err = vfs_ustat(new_decode_dev(dev), &sbuf);
- if (err)
- return err;
-
- memset(&tmp, 0, sizeof(struct compat_ustat));
- tmp.f_tfree = sbuf.f_bfree;
- tmp.f_tinode = sbuf.f_ffree;
- if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
- return -EFAULT;
- return 0;
-}
-
static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
{
if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
diff --git a/fs/statfs.c b/fs/statfs.c
index 13ae259d4879..4e4623c7a126 100644
--- a/fs/statfs.c
+++ b/fs/statfs.c
@@ -7,6 +7,7 @@
#include <linux/statfs.h>
#include <linux/security.h>
#include <linux/uaccess.h>
+#include <linux/compat.h>
#include "internal.h"
static int flags_by_mnt(int mnt_flags)
@@ -239,3 +240,142 @@ SYSCALL_DEFINE2(ustat, unsigned, dev, struct ustat __user *, ubuf)
return copy_to_user(ubuf, &tmp, sizeof(struct ustat)) ? -EFAULT : 0;
}
+
+#ifdef CONFIG_COMPAT
+static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
+{
+ if (sizeof ubuf->f_blocks == 4) {
+ if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
+ kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
+ return -EOVERFLOW;
+ /* f_files and f_ffree may be -1; it's okay
+ * to stuff that into 32 bits */
+ if (kbuf->f_files != 0xffffffffffffffffULL
+ && (kbuf->f_files & 0xffffffff00000000ULL))
+ return -EOVERFLOW;
+ if (kbuf->f_ffree != 0xffffffffffffffffULL
+ && (kbuf->f_ffree & 0xffffffff00000000ULL))
+ return -EOVERFLOW;
+ }
+ if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
+ __put_user(kbuf->f_type, &ubuf->f_type) ||
+ __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
+ __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
+ __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
+ __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
+ __put_user(kbuf->f_files, &ubuf->f_files) ||
+ __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
+ __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
+ __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
+ __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
+ __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
+ __put_user(kbuf->f_flags, &ubuf->f_flags) ||
+ __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
+ return -EFAULT;
+ return 0;
+}
+
+/*
+ * The following statfs calls are copies of code from fs/statfs.c and
+ * should be checked against those from time to time
+ */
+COMPAT_SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct compat_statfs __user *, buf)
+{
+ struct kstatfs tmp;
+ int error = user_statfs(pathname, &tmp);
+ if (!error)
+ error = put_compat_statfs(buf, &tmp);
+ return error;
+}
+
+COMPAT_SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct compat_statfs __user *, buf)
+{
+ struct kstatfs tmp;
+ int error = fd_statfs(fd, &tmp);
+ if (!error)
+ error = put_compat_statfs(buf, &tmp);
+ return error;
+}
+
+static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
+{
+ if (sizeof(ubuf->f_bsize) == 4) {
+ if ((kbuf->f_type | kbuf->f_bsize | kbuf->f_namelen |
+ kbuf->f_frsize | kbuf->f_flags) & 0xffffffff00000000ULL)
+ return -EOVERFLOW;
+ /* f_files and f_ffree may be -1; it's okay
+ * to stuff that into 32 bits */
+ if (kbuf->f_files != 0xffffffffffffffffULL
+ && (kbuf->f_files & 0xffffffff00000000ULL))
+ return -EOVERFLOW;
+ if (kbuf->f_ffree != 0xffffffffffffffffULL
+ && (kbuf->f_ffree & 0xffffffff00000000ULL))
+ return -EOVERFLOW;
+ }
+ if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
+ __put_user(kbuf->f_type, &ubuf->f_type) ||
+ __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
+ __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
+ __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
+ __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
+ __put_user(kbuf->f_files, &ubuf->f_files) ||
+ __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
+ __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
+ __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
+ __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
+ __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
+ __put_user(kbuf->f_flags, &ubuf->f_flags) ||
+ __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
+ return -EFAULT;
+ return 0;
+}
+
+COMPAT_SYSCALL_DEFINE3(statfs64, const char __user *, pathname, compat_size_t, sz, struct compat_statfs64 __user *, buf)
+{
+ struct kstatfs tmp;
+ int error;
+
+ if (sz != sizeof(*buf))
+ return -EINVAL;
+
+ error = user_statfs(pathname, &tmp);
+ if (!error)
+ error = put_compat_statfs64(buf, &tmp);
+ return error;
+}
+
+COMPAT_SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, compat_size_t, sz, struct compat_statfs64 __user *, buf)
+{
+ struct kstatfs tmp;
+ int error;
+
+ if (sz != sizeof(*buf))
+ return -EINVAL;
+
+ error = fd_statfs(fd, &tmp);
+ if (!error)
+ error = put_compat_statfs64(buf, &tmp);
+ return error;
+}
+
+/*
+ * This is a copy of sys_ustat, just dealing with a structure layout.
+ * Given how simple this syscall is that apporach is more maintainable
+ * than the various conversion hacks.
+ */
+COMPAT_SYSCALL_DEFINE2(ustat, unsigned, dev, struct compat_ustat __user *, u)
+{
+ struct compat_ustat tmp;
+ struct kstatfs sbuf;
+ int err = vfs_ustat(new_decode_dev(dev), &sbuf);
+ if (err)
+ return err;
+
+ memset(&tmp, 0, sizeof(struct compat_ustat));
+ tmp.f_tfree = sbuf.f_bfree;
+ tmp.f_tinode = sbuf.f_ffree;
+ if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
+ return -EFAULT;
+ return 0;
+}
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 09:48:58 +0000