#include <linux/uuid.h>
#include <linux/btrfs.h>
#include <linux/uaccess.h>
-#include "compat.h"
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
int btrfs_is_empty_uuid(u8 *uuid)
{
- static char empty_uuid[BTRFS_UUID_SIZE] = {0};
-
- return !memcmp(uuid, empty_uuid, BTRFS_UUID_SIZE);
+ BUILD_BUG_ON(BTRFS_UUID_SIZE > PAGE_SIZE);
+ return !memcmp(uuid, empty_zero_page, BTRFS_UUID_SIZE);
}
static noinline int create_subvol(struct inode *dir,
btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV);
btrfs_set_header_owner(leaf, objectid);
- write_extent_buffer(leaf, root->fs_info->fsid, btrfs_header_fsid(leaf),
+ write_extent_buffer(leaf, root->fs_info->fsid, btrfs_header_fsid(),
BTRFS_FSID_SIZE);
write_extent_buffer(leaf, root->fs_info->chunk_tree_uuid,
btrfs_header_chunk_tree_uuid(leaf),
if (ret)
return ret;
- btrfs_wait_ordered_extents(root, 0);
+ btrfs_wait_ordered_extents(root);
pending_snapshot = kzalloc(sizeof(*pending_snapshot), GFP_NOFS);
if (!pending_snapshot)
{
struct btrfs_path *path;
struct btrfs_key min_key;
- struct btrfs_key max_key;
struct extent_buffer *leaf;
struct btrfs_file_extent_item *extent;
int type;
min_key.type = BTRFS_EXTENT_DATA_KEY;
min_key.offset = *off;
- max_key.objectid = ino;
- max_key.type = (u8)-1;
- max_key.offset = (u64)-1;
-
path->keep_locks = 1;
while(1) {
- ret = btrfs_search_forward(root, &min_key, &max_key,
- path, newer_than);
+ ret = btrfs_search_forward(root, &min_key, path, newer_than);
if (ret != 0)
goto none;
if (min_key.objectid != ino)
ra = &file->f_ra;
}
- pages = kmalloc(sizeof(struct page *) * max_cluster,
+ pages = kmalloc_array(max_cluster, sizeof(struct page *),
GFP_NOFS);
if (!pages) {
ret = -ENOMEM;
{
struct btrfs_root *root;
struct btrfs_key key;
- struct btrfs_key max_key;
struct btrfs_path *path;
struct btrfs_ioctl_search_key *sk = &args->key;
struct btrfs_fs_info *info = BTRFS_I(inode)->root->fs_info;
key.type = sk->min_type;
key.offset = sk->min_offset;
- max_key.objectid = sk->max_objectid;
- max_key.type = sk->max_type;
- max_key.offset = sk->max_offset;
-
path->keep_locks = 1;
while(1) {
- ret = btrfs_search_forward(root, &key, &max_key, path,
- sk->min_transid);
+ ret = btrfs_search_forward(root, &key, path, sk->min_transid);
if (ret != 0) {
if (ret > 0)
ret = 0;
static long btrfs_ioctl_file_extent_same(struct file *file,
void __user *argp)
{
- struct btrfs_ioctl_same_args *args = argp;
- struct btrfs_ioctl_same_args same;
- struct btrfs_ioctl_same_extent_info info;
+ struct btrfs_ioctl_same_args tmp;
+ struct btrfs_ioctl_same_args *same;
+ struct btrfs_ioctl_same_extent_info *info;
struct inode *src = file->f_dentry->d_inode;
struct file *dst_file = NULL;
struct inode *dst;
u64 len;
int i;
int ret;
+ unsigned long size;
u64 bs = BTRFS_I(src)->root->fs_info->sb->s_blocksize;
bool is_admin = capable(CAP_SYS_ADMIN);
if (ret)
return ret;
- if (copy_from_user(&same,
+ if (copy_from_user(&tmp,
(struct btrfs_ioctl_same_args __user *)argp,
- sizeof(same))) {
+ sizeof(tmp))) {
ret = -EFAULT;
goto out;
}
- off = same.logical_offset;
- len = same.length;
+ size = sizeof(tmp) +
+ tmp.dest_count * sizeof(struct btrfs_ioctl_same_extent_info);
+
+ same = memdup_user((struct btrfs_ioctl_same_args __user *)argp, size);
+
+ if (IS_ERR(same)) {
+ ret = PTR_ERR(same);
+ goto out;
+ }
+
+ off = same->logical_offset;
+ len = same->length;
/*
* Limit the total length we will dedupe for each operation.
if (!S_ISREG(src->i_mode))
goto out;
- ret = 0;
- for (i = 0; i < same.dest_count; i++) {
- if (copy_from_user(&info, &args->info[i], sizeof(info))) {
- ret = -EFAULT;
- goto out;
- }
+ /* pre-format output fields to sane values */
+ for (i = 0; i < same->dest_count; i++) {
+ same->info[i].bytes_deduped = 0ULL;
+ same->info[i].status = 0;
+ }
- info.bytes_deduped = 0;
+ ret = 0;
+ for (i = 0; i < same->dest_count; i++) {
+ info = &same->info[i];
- dst_file = fget(info.fd);
+ dst_file = fget(info->fd);
if (!dst_file) {
- info.status = -EBADF;
+ info->status = -EBADF;
goto next;
}
if (!(is_admin || (dst_file->f_mode & FMODE_WRITE))) {
- info.status = -EINVAL;
+ info->status = -EINVAL;
goto next;
}
- info.status = -EXDEV;
+ info->status = -EXDEV;
if (file->f_path.mnt != dst_file->f_path.mnt)
goto next;
goto next;
if (S_ISDIR(dst->i_mode)) {
- info.status = -EISDIR;
+ info->status = -EISDIR;
goto next;
}
if (!S_ISREG(dst->i_mode)) {
- info.status = -EACCES;
+ info->status = -EACCES;
goto next;
}
- info.status = btrfs_extent_same(src, off, len, dst,
- info.logical_offset);
- if (info.status == 0)
- info.bytes_deduped += len;
+ info->status = btrfs_extent_same(src, off, len, dst,
+ info->logical_offset);
+ if (info->status == 0)
+ info->bytes_deduped += len;
next:
if (dst_file)
fput(dst_file);
-
- if (__put_user_unaligned(info.status, &args->info[i].status) ||
- __put_user_unaligned(info.bytes_deduped,
- &args->info[i].bytes_deduped)) {
- ret = -EFAULT;
- goto out;
- }
}
+ ret = copy_to_user(argp, same, size);
+ if (ret)
+ ret = -EFAULT;
+
out:
mnt_drop_write_file(file);
return ret;
}
if (!objectid)
- objectid = root->root_key.objectid;
+ objectid = BTRFS_FS_TREE_OBJECTID;
location.objectid = objectid;
location.type = BTRFS_ROOT_ITEM_KEY;
switch (p->cmd) {
case BTRFS_IOCTL_DEV_REPLACE_CMD_START:
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
-
+ if (root->fs_info->sb->s_flags & MS_RDONLY) {
+ ret = -EROFS;
+ goto out;
+ }
if (atomic_xchg(
&root->fs_info->mutually_exclusive_operation_running,
1)) {
if (copy_to_user(arg, p, sizeof(*p)))
ret = -EFAULT;
-
+out:
kfree(p);
return ret;
}
return btrfs_ioctl_logical_to_ino(root, argp);
case BTRFS_IOC_SPACE_INFO:
return btrfs_ioctl_space_info(root, argp);
- case BTRFS_IOC_SYNC:
- btrfs_sync_fs(file->f_dentry->d_sb, 1);
- return 0;
+ case BTRFS_IOC_SYNC: {
+ int ret;
+
+ ret = btrfs_start_all_delalloc_inodes(root->fs_info, 0);
+ if (ret)
+ return ret;
+ ret = btrfs_sync_fs(file->f_dentry->d_sb, 1);
+ return ret;
+ }
case BTRFS_IOC_START_SYNC:
return btrfs_ioctl_start_sync(root, argp);
case BTRFS_IOC_WAIT_SYNC:
projects / firefly-linux-kernel-4.4.55.git / blobdiff