mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 14:41:39 +00:00
22502ac23a
When disk space accounting was changed to be tracked by replicas entry, the ioctl interface was never update: this patch finally does that. Aditionally, the BCH_IOCTL_USAGE ioctl is now broken out into separate ioctls for filesystem and device usage. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
329 lines
8.7 KiB
C
329 lines
8.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _BCACHEFS_IOCTL_H
|
|
#define _BCACHEFS_IOCTL_H
|
|
|
|
#include <linux/uuid.h>
|
|
#include <asm/ioctl.h>
|
|
#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)
|
|
|
|
/* These only make sense when we also have incremental assembly */
|
|
#if 0
|
|
#define BCH_IOCTL_START _IOW(0xbc, 2, struct bch_ioctl_start)
|
|
#define BCH_IOCTL_STOP _IO(0xbc, 3)
|
|
#endif
|
|
|
|
#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_FS_USAGE _IOWR(0xbc, 11, struct bch_ioctl_fs_usage)
|
|
#define BCH_IOCTL_DEV_USAGE _IOWR(0xbc, 11, struct bch_ioctl_dev_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, 14, struct bch_ioctl_disk_resize)
|
|
|
|
/* ioctl below act on a particular file, not the filesystem as a whole: */
|
|
|
|
#define BCHFS_IOC_REINHERIT_ATTRS _IOR(0xbc, 64, const char __user *)
|
|
|
|
/*
|
|
* BCH_IOCTL_QUERY_UUID: get filesystem UUID
|
|
*
|
|
* Returns user visible UUID, not internal UUID (which may not ever be changed);
|
|
* the filesystem's sysfs directory may be found under /sys/fs/bcachefs with
|
|
* this UUID.
|
|
*/
|
|
struct bch_ioctl_query_uuid {
|
|
__uuid_t uuid;
|
|
};
|
|
|
|
#if 0
|
|
struct bch_ioctl_start {
|
|
__u32 flags;
|
|
__u32 pad;
|
|
};
|
|
#endif
|
|
|
|
/*
|
|
* BCH_IOCTL_DISK_ADD: add a new device to an existing filesystem
|
|
*
|
|
* The specified device must not be open or in use. On success, the new device
|
|
* will be an online member of the filesystem just like any other member.
|
|
*
|
|
* The device must first be prepared by userspace by formatting with a bcachefs
|
|
* superblock, which is only used for passing in superblock options/parameters
|
|
* for that device (in struct bch_member). The new device's superblock should
|
|
* not claim to be a member of any existing filesystem - UUIDs on it will be
|
|
* ignored.
|
|
*/
|
|
|
|
/*
|
|
* BCH_IOCTL_DISK_REMOVE: permanently remove a member device from a filesystem
|
|
*
|
|
* Any data present on @dev will be permanently deleted, and @dev will be
|
|
* removed from its slot in the filesystem's list of member devices. The device
|
|
* may be either offline or offline.
|
|
*
|
|
* Will fail removing @dev would leave us with insufficient read write devices
|
|
* or degraded/unavailable data, unless the approprate BCH_FORCE_IF_* flags are
|
|
* set.
|
|
*/
|
|
|
|
/*
|
|
* BCH_IOCTL_DISK_ONLINE: given a disk that is already a member of a filesystem
|
|
* but is not open (e.g. because we started in degraded mode), bring it online
|
|
*
|
|
* all existing data on @dev will be available once the device is online,
|
|
* exactly as if @dev was present when the filesystem was first mounted
|
|
*/
|
|
|
|
/*
|
|
* BCH_IOCTL_DISK_OFFLINE: offline a disk, causing the kernel to close that
|
|
* block device, without removing it from the filesystem (so it can be brought
|
|
* back online later)
|
|
*
|
|
* Data present on @dev will be unavailable while @dev is offline (unless
|
|
* replicated), but will still be intact and untouched if @dev is brought back
|
|
* online
|
|
*
|
|
* Will fail (similarly to BCH_IOCTL_DISK_SET_STATE) if offlining @dev would
|
|
* leave us with insufficient read write devices or degraded/unavailable data,
|
|
* unless the approprate BCH_FORCE_IF_* flags are set.
|
|
*/
|
|
|
|
struct bch_ioctl_disk {
|
|
__u32 flags;
|
|
__u32 pad;
|
|
__u64 dev;
|
|
};
|
|
|
|
/*
|
|
* BCH_IOCTL_DISK_SET_STATE: modify state of a member device of a filesystem
|
|
*
|
|
* @new_state - one of the bch_member_state states (rw, ro, failed,
|
|
* spare)
|
|
*
|
|
* Will refuse to change member state if we would then have insufficient devices
|
|
* to write to, or if it would result in degraded data (when @new_state is
|
|
* failed or spare) unless the appropriate BCH_FORCE_IF_* flags are set.
|
|
*/
|
|
struct bch_ioctl_disk_set_state {
|
|
__u32 flags;
|
|
__u8 new_state;
|
|
__u8 pad[3];
|
|
__u64 dev;
|
|
};
|
|
|
|
enum bch_data_ops {
|
|
BCH_DATA_OP_SCRUB = 0,
|
|
BCH_DATA_OP_REREPLICATE = 1,
|
|
BCH_DATA_OP_MIGRATE = 2,
|
|
BCH_DATA_OP_NR = 3,
|
|
};
|
|
|
|
/*
|
|
* 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_event,
|
|
* indicating current progress, and closing the file descriptor will stop the
|
|
* job. The file descriptor is O_CLOEXEC.
|
|
*/
|
|
struct bch_ioctl_data {
|
|
__u32 op;
|
|
__u32 flags;
|
|
|
|
struct bpos start;
|
|
struct bpos end;
|
|
|
|
union {
|
|
struct {
|
|
__u32 dev;
|
|
__u32 pad;
|
|
} migrate;
|
|
struct {
|
|
__u64 pad[8];
|
|
};
|
|
};
|
|
} __attribute__((packed, aligned(8)));
|
|
|
|
enum bch_data_event {
|
|
BCH_DATA_EVENT_PROGRESS = 0,
|
|
/* XXX: add an event for reporting errors */
|
|
BCH_DATA_EVENT_NR = 1,
|
|
};
|
|
|
|
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_data_event {
|
|
__u8 type;
|
|
__u8 pad[7];
|
|
union {
|
|
struct bch_ioctl_data_progress p;
|
|
__u64 pad2[15];
|
|
};
|
|
} __attribute__((packed, aligned(8)));
|
|
|
|
struct bch_replicas_usage {
|
|
__u64 sectors;
|
|
struct bch_replicas_entry r;
|
|
} __attribute__((packed));
|
|
|
|
static inline struct bch_replicas_usage *
|
|
replicas_usage_next(struct bch_replicas_usage *u)
|
|
{
|
|
return (void *) u + replicas_entry_bytes(&u->r) + 8;
|
|
}
|
|
|
|
/*
|
|
* BCH_IOCTL_FS_USAGE: query filesystem disk space usage
|
|
*
|
|
* Returns disk space usage broken out by data type, number of replicas, and
|
|
* by component device
|
|
*
|
|
* @replica_entries_bytes - size, in bytes, allocated for replica usage entries
|
|
*
|
|
* On success, @replica_entries_bytes will be changed to indicate the number of
|
|
* bytes actually used.
|
|
*
|
|
* Returns -ERANGE if @replica_entries_bytes was too small
|
|
*/
|
|
struct bch_ioctl_fs_usage {
|
|
__u64 capacity;
|
|
__u64 used;
|
|
__u64 online_reserved;
|
|
__u64 persistent_reserved[BCH_REPLICAS_MAX];
|
|
|
|
__u32 replica_entries_bytes;
|
|
__u32 pad;
|
|
|
|
struct bch_replicas_usage replicas[0];
|
|
};
|
|
|
|
/*
|
|
* BCH_IOCTL_DEV_USAGE: query device disk space usage
|
|
*
|
|
* Returns disk space usage broken out by data type - both by buckets and
|
|
* sectors.
|
|
*/
|
|
struct bch_ioctl_dev_usage {
|
|
__u64 dev;
|
|
__u32 flags;
|
|
__u8 state;
|
|
__u8 pad[7];
|
|
|
|
__u32 bucket_size;
|
|
__u64 nr_buckets;
|
|
|
|
__u64 buckets[BCH_DATA_NR];
|
|
__u64 sectors[BCH_DATA_NR];
|
|
};
|
|
|
|
/*
|
|
* BCH_IOCTL_READ_SUPER: read filesystem superblock
|
|
*
|
|
* Equivalent to reading the superblock directly from the block device, except
|
|
* avoids racing with the kernel writing the superblock or having to figure out
|
|
* which block device to read
|
|
*
|
|
* @sb - buffer to read into
|
|
* @size - size of userspace allocated buffer
|
|
* @dev - device to read superblock for, if BCH_READ_DEV flag is
|
|
* specified
|
|
*
|
|
* Returns -ERANGE if buffer provided is too small
|
|
*/
|
|
struct bch_ioctl_read_super {
|
|
__u32 flags;
|
|
__u32 pad;
|
|
__u64 dev;
|
|
__u64 size;
|
|
__u64 sb;
|
|
};
|
|
|
|
/*
|
|
* BCH_IOCTL_DISK_GET_IDX: give a path to a block device, query filesystem to
|
|
* determine if disk is a (online) member - if so, returns device's index
|
|
*
|
|
* Returns -ENOENT if not found
|
|
*/
|
|
struct bch_ioctl_disk_get_idx {
|
|
__u64 dev;
|
|
};
|
|
|
|
/*
|
|
* BCH_IOCTL_DISK_RESIZE: resize filesystem on a device
|
|
*
|
|
* @dev - member to resize
|
|
* @nbuckets - new number of buckets
|
|
*/
|
|
struct bch_ioctl_disk_resize {
|
|
__u32 flags;
|
|
__u32 pad;
|
|
__u64 dev;
|
|
__u64 nbuckets;
|
|
};
|
|
|
|
#endif /* _BCACHEFS_IOCTL_H */
|