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authorAnand Jain <Anand.Jain@oracle.com>2016-03-14 16:31:49 +0800
committerDavid Sterba <dsterba@suse.com>2016-03-14 14:11:33 +0100
commit2490de5da527969a9178418155120bf50f2a8421 (patch)
tree4ae37e53ae99a6eaf7aa1d82a0508103ed4fda35 /ioctl.h
parent5f17513313ddd39d4348b382cf2224dbf4d35e7b (diff)
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btrfs-progs: Introduce device delete by devid
This patch introduces new option <devid> for the command btrfs device delete <device_path|devid>[..] <mnt> In a user reported issue on a 3-disk-RAID1, one disk failed with its SB unreadable. Now with this patch user will have a choice to delete the device using devid. The other method we could do, is to match the input device_path to the available device_paths with in the kernel. But that won't work in all the cases, like what if user provided mapper path when the path within the kernel is a non-mapper path. This patch depends on the below kernel patch for the new feature to work, however it will fail-back to the old interface for the kernel without the patch Btrfs: Introduce device delete by devid Signed-off-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'ioctl.h')
-rw-r--r--ioctl.h15
1 files changed, 14 insertions, 1 deletions
diff --git a/ioctl.h b/ioctl.h
index 771da23..cab9ec2 100644
--- a/ioctl.h
+++ b/ioctl.h
@@ -45,6 +45,14 @@ struct btrfs_ioctl_vol_args {
#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
#define BTRFS_SUBVOL_RDONLY (1ULL << 1)
#define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)
+#define BTRFS_DEVICE_SPEC_BY_ID (1ULL << 3)
+
+#define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED \
+ (BTRFS_SUBVOL_CREATE_ASYNC | \
+ BTRFS_SUBVOL_RDONLY | \
+ BTRFS_SUBVOL_QGROUP_INHERIT | \
+ BTRFS_DEVICE_SPEC_BY_ID)
+
#define BTRFS_FSID_SIZE 16
#define BTRFS_UUID_SIZE 16
@@ -84,7 +92,10 @@ struct btrfs_ioctl_vol_args_v2 {
};
__u64 unused[4];
};
- char name[BTRFS_SUBVOL_NAME_MAX + 1];
+ union {
+ char name[BTRFS_SUBVOL_NAME_MAX + 1];
+ u64 devid;
+ };
};
/*
@@ -709,6 +720,8 @@ static inline char *btrfs_err_str(enum btrfs_err_code err_code)
struct btrfs_ioctl_feature_flags[2])
#define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
struct btrfs_ioctl_feature_flags[3])
+#define BTRFS_IOC_RM_DEV_V2 _IOW(BTRFS_IOCTL_MAGIC, 58, \
+ struct btrfs_ioctl_vol_args_v2)
#ifdef __cplusplus
}
#endif