#ifndef NO_BCACHEFS_CHARDEV
#include "bcachefs.h"
+#include "alloc.h"
#include "bcachefs_ioctl.h"
#include "buckets.h"
#include "chardev.h"
+#include "move.h"
#include "super.h"
#include "super-io.h"
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/major.h>
+#include <linux/anon_inodes.h>
#include <linux/cdev.h>
#include <linux/device.h>
+#include <linux/file.h>
+#include <linux/fs.h>
#include <linux/ioctl.h>
-#include <linux/uaccess.h>
+#include <linux/kthread.h>
+#include <linux/major.h>
+#include <linux/sched/task.h>
#include <linux/slab.h>
+#include <linux/uaccess.h>
/* returns with ref on ca->ref */
static struct bch_dev *bch2_device_lookup(struct bch_fs *c, u64 dev,
if (!ca)
return ERR_PTR(-EINVAL);
} else {
- struct block_device *bdev;
char *path;
- unsigned i;
path = strndup_user((const char __user *)
(unsigned long) dev, PATH_MAX);
if (IS_ERR(path))
return ERR_CAST(path);
- bdev = lookup_bdev(path);
+ ca = bch2_dev_lookup(c, path);
kfree(path);
- if (IS_ERR(bdev))
- return ERR_CAST(bdev);
-
- for_each_member_device(ca, c, i)
- if (ca->disk_sb.bdev == bdev)
- goto found;
-
- ca = ERR_PTR(-ENOENT);
-found:
- bdput(bdev);
}
return ca;
}
+#if 0
static long bch2_ioctl_assemble(struct bch_ioctl_assemble __user *user_arg)
{
struct bch_ioctl_assemble arg;
- const char *err;
+ struct bch_fs *c;
u64 *user_devs = NULL;
char **devs = NULL;
unsigned i;
}
}
- err = bch2_fs_open(devs, arg.nr_devs, bch2_opts_empty(), NULL);
- if (err) {
- pr_err("Could not open filesystem: %s", err);
- ret = -EINVAL;
- goto err;
- }
-
- ret = 0;
+ c = bch2_fs_open(devs, arg.nr_devs, bch2_opts_empty());
+ ret = PTR_ERR_OR_ZERO(c);
+ if (!ret)
+ closure_put(&c->cl);
err:
if (devs)
for (i = 0; i < arg.nr_devs; i++)
return 0;
}
+#endif
static long bch2_global_ioctl(unsigned cmd, void __user *arg)
{
switch (cmd) {
+#if 0
case BCH_IOCTL_ASSEMBLE:
return bch2_ioctl_assemble(arg);
case BCH_IOCTL_INCREMENTAL:
return bch2_ioctl_incremental(arg);
+#endif
default:
return -ENOTTY;
}
sizeof(c->sb.user_uuid));
}
+#if 0
static long bch2_ioctl_start(struct bch_fs *c, struct bch_ioctl_start arg)
{
if (arg.flags || arg.pad)
bch2_fs_stop(c);
return 0;
}
+#endif
static long bch2_ioctl_disk_add(struct bch_fs *c, struct bch_ioctl_disk arg)
{
return ret;
}
-static long bch2_ioctl_disk_evacuate(struct bch_fs *c,
- struct bch_ioctl_disk arg)
+struct bch_data_ctx {
+ struct bch_fs *c;
+ struct bch_ioctl_data arg;
+ struct bch_move_stats stats;
+
+ int ret;
+
+ struct task_struct *thread;
+};
+
+static int bch2_data_thread(void *arg)
+{
+ struct bch_data_ctx *ctx = arg;
+
+ ctx->ret = bch2_data_job(ctx->c, &ctx->stats, ctx->arg);
+
+ ctx->stats.data_type = U8_MAX;
+ return 0;
+}
+
+static int bch2_data_job_release(struct inode *inode, struct file *file)
{
- struct bch_dev *ca;
- int ret;
+ struct bch_data_ctx *ctx = file->private_data;
- if ((arg.flags & ~BCH_BY_INDEX) ||
- arg.pad)
+ kthread_stop(ctx->thread);
+ put_task_struct(ctx->thread);
+ kfree(ctx);
+ return 0;
+}
+
+static ssize_t bch2_data_job_read(struct file *file, char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ struct bch_data_ctx *ctx = file->private_data;
+ struct bch_fs *c = ctx->c;
+ struct bch_ioctl_data_event e = {
+ .type = BCH_DATA_EVENT_PROGRESS,
+ .p.data_type = ctx->stats.data_type,
+ .p.btree_id = ctx->stats.iter.btree_id,
+ .p.pos = ctx->stats.iter.pos,
+ .p.sectors_done = atomic64_read(&ctx->stats.sectors_seen),
+ .p.sectors_total = bch2_fs_sectors_used(c, bch2_fs_usage_read(c)),
+ };
+
+ if (len < sizeof(e))
return -EINVAL;
- ca = bch2_device_lookup(c, arg.dev, arg.flags);
- if (IS_ERR(ca))
- return PTR_ERR(ca);
+ return copy_to_user(buf, &e, sizeof(e)) ?: sizeof(e);
+}
- ret = bch2_dev_evacuate(c, ca);
+static const struct file_operations bcachefs_data_ops = {
+ .release = bch2_data_job_release,
+ .read = bch2_data_job_read,
+ .llseek = no_llseek,
+};
- percpu_ref_put(&ca->ref);
+static long bch2_ioctl_data(struct bch_fs *c,
+ struct bch_ioctl_data arg)
+{
+ struct bch_data_ctx *ctx = NULL;
+ struct file *file = NULL;
+ unsigned flags = O_RDONLY|O_CLOEXEC|O_NONBLOCK;
+ int ret, fd = -1;
+
+ if (arg.op >= BCH_DATA_OP_NR || arg.flags)
+ return -EINVAL;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->c = c;
+ ctx->arg = arg;
+
+ ctx->thread = kthread_create(bch2_data_thread, ctx, "[bcachefs]");
+ if (IS_ERR(ctx->thread)) {
+ ret = PTR_ERR(ctx->thread);
+ goto err;
+ }
+
+ ret = get_unused_fd_flags(flags);
+ if (ret < 0)
+ goto err;
+ fd = ret;
+
+ file = anon_inode_getfile("[bcachefs]", &bcachefs_data_ops, ctx, flags);
+ if (IS_ERR(file)) {
+ ret = PTR_ERR(file);
+ goto err;
+ }
+
+ fd_install(fd, file);
+
+ get_task_struct(ctx->thread);
+ wake_up_process(ctx->thread);
+
+ return fd;
+err:
+ if (fd >= 0)
+ put_unused_fd(fd);
+ if (!IS_ERR_OR_NULL(ctx->thread))
+ kthread_stop(ctx->thread);
+ kfree(ctx);
return ret;
}
unsigned i, j;
int ret;
+ if (!test_bit(BCH_FS_STARTED, &c->flags))
+ return -EINVAL;
+
if (copy_from_user(&arg, user_arg, sizeof(arg)))
return -EFAULT;
if (ca->dev_idx >= arg.nr_devices) {
percpu_ref_put(&ca->ref);
- return -ENOSPC;
+ return -ERANGE;
}
if (percpu_ref_tryget(&ca->io_ref)) {
return 0;
}
+static long bch2_ioctl_read_super(struct bch_fs *c,
+ struct bch_ioctl_read_super arg)
+{
+ struct bch_dev *ca = NULL;
+ struct bch_sb *sb;
+ int ret = 0;
+
+ if ((arg.flags & ~(BCH_BY_INDEX|BCH_READ_DEV)) ||
+ arg.pad)
+ return -EINVAL;
+
+ mutex_lock(&c->sb_lock);
+
+ if (arg.flags & BCH_READ_DEV) {
+ ca = bch2_device_lookup(c, arg.dev, arg.flags);
+
+ if (IS_ERR(ca)) {
+ ret = PTR_ERR(ca);
+ goto err;
+ }
+
+ sb = ca->disk_sb.sb;
+ } else {
+ sb = c->disk_sb.sb;
+ }
+
+ if (vstruct_bytes(sb) > arg.size) {
+ ret = -ERANGE;
+ goto err;
+ }
+
+ ret = copy_to_user((void __user *)(unsigned long)arg.sb,
+ sb, vstruct_bytes(sb));
+err:
+ if (ca)
+ percpu_ref_put(&ca->ref);
+ mutex_unlock(&c->sb_lock);
+ return ret;
+}
+
+static long bch2_ioctl_disk_get_idx(struct bch_fs *c,
+ struct bch_ioctl_disk_get_idx arg)
+{
+ dev_t dev = huge_decode_dev(arg.dev);
+ struct bch_dev *ca;
+ unsigned i;
+
+ for_each_online_member(ca, c, i)
+ if (ca->disk_sb.bdev->bd_dev == dev) {
+ percpu_ref_put(&ca->io_ref);
+ return i;
+ }
+
+ return -ENOENT;
+}
+
+static long bch2_ioctl_disk_resize(struct bch_fs *c,
+ struct bch_ioctl_disk_resize arg)
+{
+ struct bch_dev *ca;
+ int ret;
+
+ if ((arg.flags & ~BCH_BY_INDEX) ||
+ arg.pad)
+ return -EINVAL;
+
+ ca = bch2_device_lookup(c, arg.dev, arg.flags);
+ if (IS_ERR(ca))
+ return PTR_ERR(ca);
+
+ ret = bch2_dev_resize(c, ca, arg.nbuckets);
+
+ percpu_ref_put(&ca->ref);
+ return ret;
+}
+
#define BCH_IOCTL(_name, _argtype) \
do { \
_argtype i; \
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- /* ioctls that do require admin cap: */
switch (cmd) {
+#if 0
case BCH_IOCTL_START:
BCH_IOCTL(start, struct bch_ioctl_start);
case BCH_IOCTL_STOP:
return bch2_ioctl_stop(c);
+#endif
+ case BCH_IOCTL_READ_SUPER:
+ BCH_IOCTL(read_super, struct bch_ioctl_read_super);
+ case BCH_IOCTL_DISK_GET_IDX:
+ BCH_IOCTL(disk_get_idx, struct bch_ioctl_disk_get_idx);
+ }
+ if (!test_bit(BCH_FS_STARTED, &c->flags))
+ return -EINVAL;
+
+ /* ioctls that do require admin cap: */
+ switch (cmd) {
case BCH_IOCTL_DISK_ADD:
BCH_IOCTL(disk_add, struct bch_ioctl_disk);
case BCH_IOCTL_DISK_REMOVE:
BCH_IOCTL(disk_offline, struct bch_ioctl_disk);
case BCH_IOCTL_DISK_SET_STATE:
BCH_IOCTL(disk_set_state, struct bch_ioctl_disk_set_state);
- case BCH_IOCTL_DISK_EVACUATE:
- BCH_IOCTL(disk_evacuate, struct bch_ioctl_disk);
+ case BCH_IOCTL_DATA:
+ BCH_IOCTL(data, struct bch_ioctl_data);
+ case BCH_IOCTL_DISK_RESIZE:
+ BCH_IOCTL(disk_resize, struct bch_ioctl_disk_resize);
default:
return -ENOTTY;
}
}
+static DEFINE_IDR(bch_chardev_minor);
+
static long bch2_chardev_ioctl(struct file *filp, unsigned cmd, unsigned long v)
{
- struct bch_fs *c = filp->private_data;
+ unsigned minor = iminor(file_inode(filp));
+ struct bch_fs *c = minor < U8_MAX ? idr_find(&bch_chardev_minor, minor) : NULL;
void __user *arg = (void __user *) v;
return c
static int bch_chardev_major;
static struct class *bch_chardev_class;
static struct device *bch_chardev;
-static DEFINE_IDR(bch_chardev_minor);
void bch2_fs_chardev_exit(struct bch_fs *c)
{
return c->minor;
c->chardev = device_create(bch_chardev_class, NULL,
- MKDEV(bch_chardev_major, c->minor), NULL,
+ MKDEV(bch_chardev_major, c->minor), c,
"bcachefs%u-ctl", c->minor);
if (IS_ERR(c->chardev))
return PTR_ERR(c->chardev);
{
if (!IS_ERR_OR_NULL(bch_chardev_class))
device_destroy(bch_chardev_class,
- MKDEV(bch_chardev_major, 255));
+ MKDEV(bch_chardev_major, U8_MAX));
if (!IS_ERR_OR_NULL(bch_chardev_class))
class_destroy(bch_chardev_class);
if (bch_chardev_major > 0)
return PTR_ERR(bch_chardev_class);
bch_chardev = device_create(bch_chardev_class, NULL,
- MKDEV(bch_chardev_major, 255),
+ MKDEV(bch_chardev_major, U8_MAX),
NULL, "bcachefs-ctl");
if (IS_ERR(bch_chardev))
return PTR_ERR(bch_chardev);
projects / bcachefs-tools-debian / blobdiff