adds ioctls necessary to start and cancel scrubs, to get current
progress and to get info about devices to be scrubbed.
Note that the scrub is done per-device and that the ioctl only
returns after the scrub for this devices is finished or has been
canceled.
Signed-off-by: Jan Schmidt <list.btrfs@xxxxxxxxxxxxx>
---
fs/btrfs/ioctl.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/btrfs/ioctl.h | 7 ++++
2 files changed, 92 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index be2d4f6..f988ab6 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1715,6 +1715,31 @@ static long btrfs_ioctl_rm_dev(struct btrfs_root *root, void __user *arg)
return ret;
}
+static long btrfs_ioctl_dev_info(struct btrfs_root *root, void __user *arg)
+{
+ struct btrfs_ioctl_dev_info_args di_args;
+ struct btrfs_device *device, *next;
+ struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ di_args.num_devices = fs_devices->num_devices;
+ di_args.max_id = 0;
+
+ mutex_lock(&fs_devices->device_list_mutex);
+ list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) {
+ if (device->devid > di_args.max_id)
+ di_args.max_id = device->devid;
+ }
+ mutex_unlock(&fs_devices->device_list_mutex);
+
+ if (copy_to_user(arg, &di_args, sizeof(di_args)))
+ return -EFAULT;
+
+ return 0;
+}
+
static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
u64 off, u64 olen, u64 destoff)
{
@@ -2372,6 +2397,58 @@ static noinline long btrfs_ioctl_wait_sync(struct file *file, void __user *argp)
return btrfs_wait_for_commit(root, transid);
}
+static long btrfs_ioctl_scrub(struct btrfs_root *root, void __user *arg)
+{
+ int ret;
+ struct btrfs_ioctl_scrub_args *sa;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ sa = memdup_user(arg, sizeof(*sa));
+ if (IS_ERR(sa))
+ return PTR_ERR(sa);
+
+ ret = btrfs_scrub_dev(root, sa->devid, sa->start, sa->end,
+ &sa->progress);
+
+ if (copy_to_user(arg, sa, sizeof(*sa)))
+ ret = -EFAULT;
+
+ kfree(sa);
+ return ret;
+}
+
+static long btrfs_ioctl_scrub_cancel(struct btrfs_root *root, void __user *arg)
+{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ return btrfs_scrub_cancel(root);
+}
+
+static long btrfs_ioctl_scrub_progress(struct btrfs_root *root,
+ void __user *arg)
+{
+ struct btrfs_ioctl_scrub_args *sa;
+ int ret;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ sa = memdup_user(arg, sizeof(*sa));
+ if (IS_ERR(sa))
+ return PTR_ERR(sa);
+
+ ret = btrfs_scrub_progress(root, sa->devid, &sa->progress);
+
+ if (copy_to_user(arg, sa, sizeof(*sa)))
+ ret = -EFAULT;
+
+ kfree(sa);
+ return ret;
+}
+
long btrfs_ioctl(struct file *file, unsigned int
cmd, unsigned long arg)
{
@@ -2409,6 +2486,8 @@ long btrfs_ioctl(struct file *file, unsigned int
return btrfs_ioctl_add_dev(root, argp);
case BTRFS_IOC_RM_DEV:
return btrfs_ioctl_rm_dev(root, argp);
+ case BTRFS_IOC_DEV_INFO:
+ return btrfs_ioctl_dev_info(root, argp);
case BTRFS_IOC_BALANCE:
return btrfs_balance(root->fs_info->dev_root);
case BTRFS_IOC_CLONE:
@@ -2432,6 +2511,12 @@ long btrfs_ioctl(struct file *file, unsigned int
return btrfs_ioctl_start_sync(file, argp);
case BTRFS_IOC_WAIT_SYNC:
return btrfs_ioctl_wait_sync(file, argp);
+ case BTRFS_IOC_SCRUB:
+ return btrfs_ioctl_scrub(root, argp);
+ case BTRFS_IOC_SCRUB_CANCEL:
+ return btrfs_ioctl_scrub_cancel(root, argp);
+ case BTRFS_IOC_SCRUB_PROGRESS:
+ return btrfs_ioctl_scrub_progress(root, argp);
}
return -ENOTTY;
diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index f7bf177..9aa3603 100644
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -232,4 +232,11 @@ struct btrfs_ioctl_space_args {
struct btrfs_ioctl_vol_args_v2)
#define BTRFS_IOC_SUBVOL_GETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 25, __u64)
#define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
+#define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
+ struct btrfs_ioctl_scrub_args)
+#define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
+#define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
+ struct btrfs_ioctl_scrub_args)
+#define BTRFS_IOC_DEV_INFO _IOR(BTRFS_IOCTL_MAGIC, 30, \
+ struct btrfs_ioctl_dev_info_args)
#endif
--
1.7.3.4
--
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