nilfs2: add FITRIM ioctl support for nilfs2 (f9f32c44) · Commits · 戴 / test

fs/nilfs2/ioctl.c

+45 −0

Original line number	Diff line number	Diff line
		@@ -1071,6 +1071,48 @@ out:
		return ret;
		}

		/**
		* nilfs_ioctl_trim_fs() - trim ioctl handle function
		* @inode: inode object
		* @argp: pointer on argument from userspace
		*
		* Decription: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It
		* checks the arguments from userspace and calls nilfs_sufile_trim_fs, which
		* performs the actual trim operation.
		*
		* Return Value: On success, 0 is returned or negative error code, otherwise.
		*/
		static int nilfs_ioctl_trim_fs(struct inode inode, void __user argp)
		{
		struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
		struct request_queue *q = bdev_get_queue(nilfs->ns_bdev);
		struct fstrim_range range;
		int ret;

		if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

		if (!blk_queue_discard(q))
		return -EOPNOTSUPP;

		if (copy_from_user(&range, argp, sizeof(range)))
		return -EFAULT;

		range.minlen = max_t(u64, range.minlen, q->limits.discard_granularity);

		down_read(&nilfs->ns_segctor_sem);
		ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range);
		up_read(&nilfs->ns_segctor_sem);

		if (ret < 0)
		return ret;

		if (copy_to_user(argp, &range, sizeof(range)))
		return -EFAULT;

		return 0;
		}

		/**
		* nilfs_ioctl_set_alloc_range - limit range of segments to be allocated
		* @inode: inode object
		@@ -1296,6 +1338,8 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
		return nilfs_ioctl_resize(inode, filp, argp);
		case NILFS_IOCTL_SET_ALLOC_RANGE:
		return nilfs_ioctl_set_alloc_range(inode, argp);
		case FITRIM:
		return nilfs_ioctl_trim_fs(inode, argp);
		default:
		return -ENOTTY;
		}
		@@ -1327,6 +1371,7 @@ long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
		case NILFS_IOCTL_SYNC:
		case NILFS_IOCTL_RESIZE:
		case NILFS_IOCTL_SET_ALLOC_RANGE:
		case FITRIM:
		break;
		default:
		return -ENOIOCTLCMD;

Admin message