From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f196.google.com ([209.85.216.196]:34741 "EHLO mail-qt0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756097AbeEHWSM (ORCPT ); Tue, 8 May 2018 18:18:12 -0400 From: Kent Overstreet To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-bcache@vger.kernel.org Cc: Kent Overstreet , Dave Chinner , "Darrick J . Wong" , hare@suse.com Subject: [PATCH 2/2] bcachefs: Ioctl interface Date: Tue, 8 May 2018 18:18:00 -0400 Message-Id: <20180508221800.2642-3-kent.overstreet@gmail.com> In-Reply-To: <20180508221800.2642-1-kent.overstreet@gmail.com> References: <20180508221800.2642-1-kent.overstreet@gmail.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Signed-off-by: Kent Overstreet --- fs/bcachefs/bcachefs_ioctl.h | 182 +++++++++++++++++++++++++++++++++++ 1 file changed, 182 insertions(+) create mode 100644 fs/bcachefs/bcachefs_ioctl.h diff --git a/fs/bcachefs/bcachefs_ioctl.h b/fs/bcachefs/bcachefs_ioctl.h new file mode 100644 index 0000000000..4442a02b5c --- /dev/null +++ b/fs/bcachefs/bcachefs_ioctl.h @@ -0,0 +1,182 @@ +#ifndef _BCACHEFS_IOCTL_H +#define _BCACHEFS_IOCTL_H + +#include +#include +#include "bcachefs_format.h" + +/* + * Flags common to multiple ioctls: + */ +#define BCH_FORCE_IF_DATA_LOST (1 << 0) +#define BCH_FORCE_IF_METADATA_LOST (1 << 1) +#define BCH_FORCE_IF_DATA_DEGRADED (1 << 2) +#define BCH_FORCE_IF_METADATA_DEGRADED (1 << 3) + +#define BCH_FORCE_IF_DEGRADED \ + (BCH_FORCE_IF_DATA_DEGRADED| \ + BCH_FORCE_IF_METADATA_DEGRADED) + +/* + * If cleared, ioctl that refer to a device pass it as a pointer to a pathname + * (e.g. /dev/sda1); if set, the dev field is the device's index within the + * filesystem: + */ +#define BCH_BY_INDEX (1 << 4) + +/* + * For BCH_IOCTL_READ_SUPER: get superblock of a specific device, not filesystem + * wide superblock: + */ +#define BCH_READ_DEV (1 << 5) + +/* global control dev: */ + +/* These are currently broken, and probably unnecessary: */ +#if 0 +#define BCH_IOCTL_ASSEMBLE _IOW(0xbc, 1, struct bch_ioctl_assemble) +#define BCH_IOCTL_INCREMENTAL _IOW(0xbc, 2, struct bch_ioctl_incremental) + +struct bch_ioctl_assemble { + __u32 flags; + __u32 nr_devs; + __u64 pad; + __u64 devs[]; +}; + +struct bch_ioctl_incremental { + __u32 flags; + __u64 pad; + __u64 dev; +}; +#endif + +/* filesystem ioctls: */ + +#define BCH_IOCTL_QUERY_UUID _IOR(0xbc, 1, struct bch_ioctl_query_uuid) +#define BCH_IOCTL_START _IOW(0xbc, 2, struct bch_ioctl_start) +#define BCH_IOCTL_STOP _IO(0xbc, 3) +#define BCH_IOCTL_DISK_ADD _IOW(0xbc, 4, struct bch_ioctl_disk) +#define BCH_IOCTL_DISK_REMOVE _IOW(0xbc, 5, struct bch_ioctl_disk) +#define BCH_IOCTL_DISK_ONLINE _IOW(0xbc, 6, struct bch_ioctl_disk) +#define BCH_IOCTL_DISK_OFFLINE _IOW(0xbc, 7, struct bch_ioctl_disk) +#define BCH_IOCTL_DISK_SET_STATE _IOW(0xbc, 8, struct bch_ioctl_disk_set_state) +#define BCH_IOCTL_DATA _IOW(0xbc, 10, struct bch_ioctl_data) +#define BCH_IOCTL_USAGE _IOWR(0xbc, 11, struct bch_ioctl_usage) +#define BCH_IOCTL_READ_SUPER _IOW(0xbc, 12, struct bch_ioctl_read_super) +#define BCH_IOCTL_DISK_GET_IDX _IOW(0xbc, 13, struct bch_ioctl_disk_get_idx) +#define BCH_IOCTL_DISK_RESIZE _IOW(0xbc, 13, struct bch_ioctl_disk_resize) + +struct bch_ioctl_query_uuid { + uuid_le uuid; +}; + +struct bch_ioctl_start { + __u32 flags; + __u32 pad; +}; + +struct bch_ioctl_disk { + __u32 flags; + __u32 pad; + __u64 dev; +}; + +struct bch_ioctl_disk_set_state { + __u32 flags; + __u8 new_state; + __u8 pad[3]; + __u64 dev; +}; + +/* + * BCH_IOCTL_DATA: operations that walk and manipulate filesystem data (e.g. + * scrub, rereplicate, migrate). + * + * This ioctl kicks off a job in the background, and returns a file descriptor. + * Reading from the file descriptor returns a struct bch_ioctl_data_progress, + * indicating current progress, and closing the file descriptor will stop the + * job. The file descriptor is O_CLOEXEC. + */ + +enum bch_data_ops { + BCH_DATA_OP_SCRUB = 0, + BCH_DATA_OP_REREPLICATE = 1, + BCH_DATA_OP_MIGRATE = 2, + BCH_DATA_OP_NR = 3, +}; + +struct bch_ioctl_data { + __u32 op; + __u32 flags; + + struct bpos start; + struct bpos end; + + union { + struct { + __u32 dev; + __u32 pad; + } migrate; + }; +} __attribute__((packed, aligned(8))); + +struct bch_ioctl_data_progress { + __u8 data_type; + __u8 btree_id; + __u8 pad[2]; + struct bpos pos; + + __u64 sectors_done; + __u64 sectors_total; +} __attribute__((packed, aligned(8))); + +struct bch_ioctl_dev_usage { + __u8 state; + __u8 alive; + __u8 pad[6]; + __u32 dev; + + __u32 bucket_size; + __u64 nr_buckets; + + __u64 buckets[BCH_DATA_NR]; + __u64 sectors[BCH_DATA_NR]; +}; + +struct bch_ioctl_fs_usage { + __u64 capacity; + __u64 used; + __u64 online_reserved; + __u64 persistent_reserved[BCH_REPLICAS_MAX]; + __u64 sectors[BCH_DATA_NR][BCH_REPLICAS_MAX]; +}; + +struct bch_ioctl_usage { + __u16 nr_devices; + __u16 pad[3]; + + struct bch_ioctl_fs_usage fs; + struct bch_ioctl_dev_usage devs[0]; +}; + +struct bch_ioctl_read_super { + __u32 flags; + __u32 pad; + __u64 dev; + __u64 size; + __u64 sb; +}; + +struct bch_ioctl_disk_get_idx { + __u64 dev; +}; + +struct bch_ioctl_disk_resize { + __u32 flags; + __u32 pad; + __u64 dev; + __u64 nbuckets; +}; + +#endif /* _BCACHEFS_IOCTL_H */ -- 2.17.0