Btrfs: fix the new inspection ioctls for 32 bit compat
The new ioctls to follow backrefs are not clean for 32/64 bit
compat. This reworks them for u64s everywhere. They are brand new, so
there are no problems with changing the interface now.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 2351df0..8855aad 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -676,14 +676,14 @@
bytes_left = ipath->fspath->bytes_left > s_ptr ?
ipath->fspath->bytes_left - s_ptr : 0;
- fspath_min = (char *)ipath->fspath->str + (i + 1) * s_ptr;
+ fspath_min = (char *)ipath->fspath->val + (i + 1) * s_ptr;
fspath = iref_to_path(ipath->fs_root, ipath->btrfs_path, iref, eb,
inum, fspath_min, bytes_left);
if (IS_ERR(fspath))
return PTR_ERR(fspath);
if (fspath > fspath_min) {
- ipath->fspath->str[i] = fspath;
+ ipath->fspath->val[i] = (u64)fspath;
++ipath->fspath->elem_cnt;
ipath->fspath->bytes_left = fspath - fspath_min;
} else {
@@ -698,9 +698,9 @@
/*
* this dumps all file system paths to the inode into the ipath struct, provided
* is has been created large enough. each path is zero-terminated and accessed
- * from ipath->fspath->str[i].
+ * from ipath->fspath->val[i].
* when it returns, there are ipath->fspath->elem_cnt number of paths available
- * in ipath->fspath->str[]. when the allocated space wasn't sufficient, the
+ * in ipath->fspath->val[]. when the allocated space wasn't sufficient, the
* number of missed paths in recored in ipath->fspath->elem_missed, otherwise,
* it's zero. ipath->fspath->bytes_missing holds the number of bytes that would
* have been needed to return all paths.
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index cc98939..4a34c47 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2895,7 +2895,7 @@
{
int ret = 0;
int i;
- unsigned long rel_ptr;
+ u64 rel_ptr;
int size;
struct btrfs_ioctl_ino_path_args *ipa = NULL;
struct inode_fs_paths *ipath = NULL;
@@ -2930,11 +2930,11 @@
goto out;
for (i = 0; i < ipath->fspath->elem_cnt; ++i) {
- rel_ptr = ipath->fspath->str[i] - (char *)ipath->fspath->str;
- ipath->fspath->str[i] = (void *)rel_ptr;
+ rel_ptr = ipath->fspath->val[i] - (u64)ipath->fspath->val;
+ ipath->fspath->val[i] = rel_ptr;
}
- ret = copy_to_user(ipa->fspath, ipath->fspath, size);
+ ret = copy_to_user((void *)ipa->fspath, (void *)ipath->fspath, size);
if (ret) {
ret = -EFAULT;
goto out;
@@ -3017,7 +3017,7 @@
if (ret < 0)
goto out;
- ret = copy_to_user(loi->inodes, inodes, size);
+ ret = copy_to_user((void *)loi->inodes, (void *)inodes, size);
if (ret)
ret = -EFAULT;
diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index 2da30d4..252ae99 100644
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -198,24 +198,23 @@
__u32 bytes_missing; /* out -- additional bytes needed for result */
__u32 elem_cnt; /* out */
__u32 elem_missed; /* out */
- union {
- char *str[0]; /* out */
- __u64 val[0]; /* out */
- };
+ __u64 val[0]; /* out */
};
struct btrfs_ioctl_ino_path_args {
__u64 inum; /* in */
__u32 size; /* in */
__u64 reserved[4];
- struct btrfs_data_container *fspath; /* out */
+ /* struct btrfs_data_container *fspath; out */
+ __u64 fspath; /* out */
};
struct btrfs_ioctl_logical_ino_args {
__u64 logical; /* in */
__u32 size; /* in */
__u64 reserved[4];
- struct btrfs_data_container *inodes; /* out */
+ /* struct btrfs_data_container *inodes; out */
+ __u64 inodes;
};
#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 94cd3a1..562dad1 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -272,7 +272,7 @@
swarn->logical, swarn->dev->name,
(unsigned long long)swarn->sector, root, inum, offset,
min(isize - offset, (u64)PAGE_SIZE), nlink,
- ipath->fspath->str[i]);
+ (char *)ipath->fspath->val[i]);
free_ipath(ipath);
return 0;