*/
if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NOCOMPRESS) &&
(btrfs_test_opt(root, COMPRESS) ||
- (BTRFS_I(inode)->force_compress))) {
+ (BTRFS_I(inode)->force_compress) ||
+ (BTRFS_I(inode)->flags & BTRFS_INODE_COMPRESS))) {
WARN_ON(pages);
pages = kzalloc(sizeof(struct page *) * nr_pages, GFP_NOFS);
ret = run_delalloc_nocow(inode, locked_page, start, end,
page_started, 0, nr_written);
else if (!btrfs_test_opt(root, COMPRESS) &&
- !(BTRFS_I(inode)->force_compress))
+ !(BTRFS_I(inode)->force_compress) &&
+ !(BTRFS_I(inode)->flags & BTRFS_INODE_COMPRESS))
ret = cow_file_range(inode, locked_page, start, end,
page_started, nr_written, 1);
else
if ((mode & S_IFREG)) {
if (btrfs_test_opt(root, NODATASUM))
BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM;
- if (btrfs_test_opt(root, NODATACOW))
+ if (btrfs_test_opt(root, NODATACOW) ||
+ (BTRFS_I(dir)->flags & BTRFS_INODE_NODATACOW))
BTRFS_I(inode)->flags |= BTRFS_INODE_NODATACOW;
}
return 0;
}
+/*
+ * If a file is moved, it will inherit the cow and compression flags of the new
+ * directory.
+ */
+static void fixup_inode_flags(struct inode *dir, struct inode *inode)
+{
+ struct btrfs_inode *b_dir = BTRFS_I(dir);
+ struct btrfs_inode *b_inode = BTRFS_I(inode);
+
+ if (b_dir->flags & BTRFS_INODE_NODATACOW)
+ b_inode->flags |= BTRFS_INODE_NODATACOW;
+ else
+ b_inode->flags &= ~BTRFS_INODE_NODATACOW;
+
+ if (b_dir->flags & BTRFS_INODE_COMPRESS)
+ b_inode->flags |= BTRFS_INODE_COMPRESS;
+ else
+ b_inode->flags &= ~BTRFS_INODE_COMPRESS;
+}
+
static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
}
}
+ fixup_inode_flags(new_dir, old_inode);
+
ret = btrfs_add_link(trans, new_dir, old_inode,
new_dentry->d_name.name,
new_dentry->d_name.len, 0, index);
return 0;
}
+static int check_flags(unsigned int flags)
+{
+ if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
+ FS_NOATIME_FL | FS_NODUMP_FL | \
+ FS_SYNC_FL | FS_DIRSYNC_FL | \
+ FS_NOCOMP_FL | FS_COMPR_FL | \
+ FS_NOCOW_FL | FS_COW_FL))
+ return -EOPNOTSUPP;
+
+ if ((flags & FS_NOCOMP_FL) && (flags & FS_COMPR_FL))
+ return -EINVAL;
+
+ if ((flags & FS_NOCOW_FL) && (flags & FS_COW_FL))
+ return -EINVAL;
+
+ return 0;
+}
+
static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
{
struct inode *inode = file->f_path.dentry->d_inode;
if (copy_from_user(&flags, arg, sizeof(flags)))
return -EFAULT;
- if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
- FS_NOATIME_FL | FS_NODUMP_FL | \
- FS_SYNC_FL | FS_DIRSYNC_FL))
- return -EOPNOTSUPP;
+ ret = check_flags(flags);
+ if (ret)
+ return ret;
if (!is_owner_or_cap(inode))
return -EACCES;
else
ip->flags &= ~BTRFS_INODE_DIRSYNC;
+ /*
+ * The COMPRESS flag can only be changed by users, while the NOCOMPRESS
+ * flag may be changed automatically if compression code won't make
+ * things smaller.
+ */
+ if (flags & FS_NOCOMP_FL) {
+ ip->flags &= ~BTRFS_INODE_COMPRESS;
+ ip->flags |= BTRFS_INODE_NOCOMPRESS;
+ } else if (flags & FS_COMPR_FL) {
+ ip->flags |= BTRFS_INODE_COMPRESS;
+ ip->flags &= ~BTRFS_INODE_NOCOMPRESS;
+ }
+ if (flags & FS_NOCOW_FL)
+ ip->flags |= BTRFS_INODE_NODATACOW;
+ else if (flags & FS_COW_FL)
+ ip->flags &= ~BTRFS_INODE_NODATACOW;
trans = btrfs_join_transaction(root, 1);
BUG_ON(IS_ERR(trans));