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Diffstat (limited to 'fs/btrfs/ioctl.c')
-rw-r--r--fs/btrfs/ioctl.c156
1 files changed, 102 insertions, 54 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 6c7a49f..fd172a9 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -86,6 +86,19 @@ struct btrfs_ioctl_received_subvol_args_32 {
struct btrfs_ioctl_received_subvol_args_32)
#endif
+#if defined(CONFIG_64BIT) && defined(CONFIG_COMPAT)
+struct btrfs_ioctl_send_args_32 {
+ __s64 send_fd; /* in */
+ __u64 clone_sources_count; /* in */
+ compat_uptr_t clone_sources; /* in */
+ __u64 parent_root; /* in */
+ __u64 flags; /* in */
+ __u64 reserved[4]; /* in */
+} __attribute__ ((__packed__));
+
+#define BTRFS_IOC_SEND_32 _IOW(BTRFS_IOCTL_MAGIC, 38, \
+ struct btrfs_ioctl_send_args_32)
+#endif
static int btrfs_clone(struct inode *src, struct inode *inode,
u64 off, u64 olen, u64 olen_aligned, u64 destoff,
@@ -609,23 +622,6 @@ fail_free:
return ret;
}
-static void btrfs_wait_for_no_snapshotting_writes(struct btrfs_root *root)
-{
- s64 writers;
- DEFINE_WAIT(wait);
-
- do {
- prepare_to_wait(&root->subv_writers->wait, &wait,
- TASK_UNINTERRUPTIBLE);
-
- writers = percpu_counter_sum(&root->subv_writers->counter);
- if (writers)
- schedule();
-
- finish_wait(&root->subv_writers->wait, &wait);
- } while (writers);
-}
-
static int create_snapshot(struct btrfs_root *root, struct inode *dir,
struct dentry *dentry,
u64 *async_transid, bool readonly,
@@ -654,7 +650,9 @@ static int create_snapshot(struct btrfs_root *root, struct inode *dir,
atomic_inc(&root->will_be_snapshotted);
smp_mb__after_atomic();
- btrfs_wait_for_no_snapshotting_writes(root);
+ /* wait for no snapshot writes */
+ wait_event(root->subv_writers->wait,
+ percpu_counter_sum(&root->subv_writers->counter) == 0);
ret = btrfs_start_delalloc_inodes(root, 0);
if (ret)
@@ -1219,6 +1217,7 @@ again:
unlock_page(pages[i]);
put_page(pages[i]);
}
+ btrfs_delalloc_release_extents(BTRFS_I(inode), page_cnt << PAGE_SHIFT);
extent_changeset_free(data_reserved);
return i_done;
out:
@@ -1229,6 +1228,7 @@ out:
btrfs_delalloc_release_space(inode, data_reserved,
start_index << PAGE_SHIFT,
page_cnt << PAGE_SHIFT);
+ btrfs_delalloc_release_extents(BTRFS_I(inode), page_cnt << PAGE_SHIFT);
extent_changeset_free(data_reserved);
return ret;
@@ -1420,21 +1420,6 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
filemap_flush(inode->i_mapping);
}
- if (do_compress) {
- /* the filemap_flush will queue IO into the worker threads, but
- * we have to make sure the IO is actually started and that
- * ordered extents get created before we return
- */
- atomic_inc(&fs_info->async_submit_draining);
- while (atomic_read(&fs_info->nr_async_submits) ||
- atomic_read(&fs_info->async_delalloc_pages)) {
- wait_event(fs_info->async_submit_wait,
- (atomic_read(&fs_info->nr_async_submits) == 0 &&
- atomic_read(&fs_info->async_delalloc_pages) == 0));
- }
- atomic_dec(&fs_info->async_submit_draining);
- }
-
if (range->compress_type == BTRFS_COMPRESS_LZO) {
btrfs_set_fs_incompat(fs_info, COMPRESS_LZO);
} else if (range->compress_type == BTRFS_COMPRESS_ZSTD) {
@@ -1842,8 +1827,13 @@ static noinline int btrfs_ioctl_subvol_setflags(struct file *file,
ret = btrfs_update_root(trans, fs_info->tree_root,
&root->root_key, &root->root_item);
+ if (ret < 0) {
+ btrfs_end_transaction(trans);
+ goto out_reset;
+ }
+
+ ret = btrfs_commit_transaction(trans);
- btrfs_commit_transaction(trans);
out_reset:
if (ret)
btrfs_set_root_flags(&root->root_item, root_flags);
@@ -2179,7 +2169,7 @@ static noinline int btrfs_ioctl_tree_search_v2(struct file *file,
inode = file_inode(file);
ret = search_ioctl(inode, &args.key, &buf_size,
- (char *)(&uarg->buf[0]));
+ (char __user *)(&uarg->buf[0]));
if (ret == 0 && copy_to_user(&uarg->key, &args.key, sizeof(args.key)))
ret = -EFAULT;
else if (ret == -EOVERFLOW &&
@@ -3706,7 +3696,7 @@ process_slot:
if (disko) {
inode_add_bytes(inode, datal);
ret = btrfs_inc_extent_ref(trans,
- fs_info,
+ root,
disko, diskl, 0,
root->root_key.objectid,
btrfs_ino(BTRFS_I(inode)),
@@ -4129,10 +4119,12 @@ static long btrfs_ioctl_space_info(struct btrfs_fs_info *fs_info,
struct btrfs_ioctl_space_info *dest_orig;
struct btrfs_ioctl_space_info __user *user_dest;
struct btrfs_space_info *info;
- u64 types[] = {BTRFS_BLOCK_GROUP_DATA,
- BTRFS_BLOCK_GROUP_SYSTEM,
- BTRFS_BLOCK_GROUP_METADATA,
- BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA};
+ static const u64 types[] = {
+ BTRFS_BLOCK_GROUP_DATA,
+ BTRFS_BLOCK_GROUP_SYSTEM,
+ BTRFS_BLOCK_GROUP_METADATA,
+ BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA
+ };
int num_types = 4;
int alloc_size;
int ret = 0;
@@ -4504,8 +4496,8 @@ static long btrfs_ioctl_ino_to_path(struct btrfs_root *root, void __user *arg)
ipath->fspath->val[i] = rel_ptr;
}
- ret = copy_to_user((void *)(unsigned long)ipa->fspath,
- (void *)(unsigned long)ipath->fspath, size);
+ ret = copy_to_user((void __user *)(unsigned long)ipa->fspath,
+ ipath->fspath, size);
if (ret) {
ret = -EFAULT;
goto out;
@@ -4540,13 +4532,14 @@ static int build_ino_list(u64 inum, u64 offset, u64 root, void *ctx)
}
static long btrfs_ioctl_logical_to_ino(struct btrfs_fs_info *fs_info,
- void __user *arg)
+ void __user *arg, int version)
{
int ret = 0;
int size;
struct btrfs_ioctl_logical_ino_args *loi;
struct btrfs_data_container *inodes = NULL;
struct btrfs_path *path = NULL;
+ bool ignore_offset;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -4555,13 +4548,30 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_fs_info *fs_info,
if (IS_ERR(loi))
return PTR_ERR(loi);
+ if (version == 1) {
+ ignore_offset = false;
+ size = min_t(u32, loi->size, SZ_64K);
+ } else {
+ /* All reserved bits must be 0 for now */
+ if (memchr_inv(loi->reserved, 0, sizeof(loi->reserved))) {
+ ret = -EINVAL;
+ goto out_loi;
+ }
+ /* Only accept flags we have defined so far */
+ if (loi->flags & ~(BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET)) {
+ ret = -EINVAL;
+ goto out_loi;
+ }
+ ignore_offset = loi->flags & BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET;
+ size = min_t(u32, loi->size, SZ_16M);
+ }
+
path = btrfs_alloc_path();
if (!path) {
ret = -ENOMEM;
goto out;
}
- size = min_t(u32, loi->size, SZ_64K);
inodes = init_data_container(size);
if (IS_ERR(inodes)) {
ret = PTR_ERR(inodes);
@@ -4570,20 +4580,21 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_fs_info *fs_info,
}
ret = iterate_inodes_from_logical(loi->logical, fs_info, path,
- build_ino_list, inodes);
+ build_ino_list, inodes, ignore_offset);
if (ret == -EINVAL)
ret = -ENOENT;
if (ret < 0)
goto out;
- ret = copy_to_user((void *)(unsigned long)loi->inodes,
- (void *)(unsigned long)inodes, size);
+ ret = copy_to_user((void __user *)(unsigned long)loi->inodes, inodes,
+ size);
if (ret)
ret = -EFAULT;
out:
btrfs_free_path(path);
kvfree(inodes);
+out_loi:
kfree(loi);
return ret;
@@ -5160,15 +5171,11 @@ static long _btrfs_ioctl_set_received_subvol(struct file *file,
root->root_key.objectid);
if (ret < 0 && ret != -EEXIST) {
btrfs_abort_transaction(trans, ret);
+ btrfs_end_transaction(trans);
goto out;
}
}
ret = btrfs_commit_transaction(trans);
- if (ret < 0) {
- btrfs_abort_transaction(trans, ret);
- goto out;
- }
-
out:
up_write(&fs_info->subvol_sem);
mnt_drop_write_file(file);
@@ -5490,6 +5497,41 @@ out_drop_write:
return ret;
}
+static int _btrfs_ioctl_send(struct file *file, void __user *argp, bool compat)
+{
+ struct btrfs_ioctl_send_args *arg;
+ int ret;
+
+ if (compat) {
+#if defined(CONFIG_64BIT) && defined(CONFIG_COMPAT)
+ struct btrfs_ioctl_send_args_32 args32;
+
+ ret = copy_from_user(&args32, argp, sizeof(args32));
+ if (ret)
+ return -EFAULT;
+ arg = kzalloc(sizeof(*arg), GFP_KERNEL);
+ if (!arg)
+ return -ENOMEM;
+ arg->send_fd = args32.send_fd;
+ arg->clone_sources_count = args32.clone_sources_count;
+ arg->clone_sources = compat_ptr(args32.clone_sources);
+ arg->parent_root = args32.parent_root;
+ arg->flags = args32.flags;
+ memcpy(arg->reserved, args32.reserved,
+ sizeof(args32.reserved));
+#else
+ return -ENOTTY;
+#endif
+ } else {
+ arg = memdup_user(argp, sizeof(*arg));
+ if (IS_ERR(arg))
+ return PTR_ERR(arg);
+ }
+ ret = btrfs_ioctl_send(file, arg);
+ kfree(arg);
+ return ret;
+}
+
long btrfs_ioctl(struct file *file, unsigned int
cmd, unsigned long arg)
{
@@ -5554,7 +5596,9 @@ long btrfs_ioctl(struct file *file, unsigned int
case BTRFS_IOC_INO_PATHS:
return btrfs_ioctl_ino_to_path(root, argp);
case BTRFS_IOC_LOGICAL_INO:
- return btrfs_ioctl_logical_to_ino(fs_info, argp);
+ return btrfs_ioctl_logical_to_ino(fs_info, argp, 1);
+ case BTRFS_IOC_LOGICAL_INO_V2:
+ return btrfs_ioctl_logical_to_ino(fs_info, argp, 2);
case BTRFS_IOC_SPACE_INFO:
return btrfs_ioctl_space_info(fs_info, argp);
case BTRFS_IOC_SYNC: {
@@ -5595,7 +5639,11 @@ long btrfs_ioctl(struct file *file, unsigned int
return btrfs_ioctl_set_received_subvol_32(file, argp);
#endif
case BTRFS_IOC_SEND:
- return btrfs_ioctl_send(file, argp);
+ return _btrfs_ioctl_send(file, argp, false);
+#if defined(CONFIG_64BIT) && defined(CONFIG_COMPAT)
+ case BTRFS_IOC_SEND_32:
+ return _btrfs_ioctl_send(file, argp, true);
+#endif
case BTRFS_IOC_GET_DEV_STATS:
return btrfs_ioctl_get_dev_stats(fs_info, argp);
case BTRFS_IOC_QUOTA_CTL:
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