From f1fa7f264250f2cb60119aca3fd114c3f47070c2 Mon Sep 17 00:00:00 2001 From: Anand Jain Date: Sat, 13 Feb 2016 10:01:33 +0800 Subject: [PATCH] btrfs: create helper function __check_raid_min_devices() move a section of btrfs_rm_device() code to check for min number of the devices into the function __check_raid_min_devices() Signed-off-by: Anand Jain Signed-off-by: David Sterba --- fs/btrfs/volumes.c | 51 ++++++++++++++++++++++++++++++++------------------- 1 file changed, 32 insertions(+), 19 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 5006683..db781d0 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1705,23 +1705,20 @@ out: return ret; } -int btrfs_rm_device(struct btrfs_root *root, char *device_path) +static int __check_raid_min_devices(struct btrfs_root *root) { - struct btrfs_device *device; - struct btrfs_device *next_device; - struct block_device *bdev; - struct buffer_head *bh = NULL; - struct btrfs_super_block *disk_super; - struct btrfs_fs_devices *cur_devices; u64 all_avail; - u64 devid; u64 num_devices; - u8 *dev_uuid; unsigned seq; int ret = 0; - bool clear_super = false; - mutex_lock(&uuid_mutex); + num_devices = root->fs_info->fs_devices->num_devices; + btrfs_dev_replace_lock(&root->fs_info->dev_replace, 0); + if (btrfs_dev_replace_is_ongoing(&root->fs_info->dev_replace)) { + WARN_ON(num_devices < 1); + num_devices--; + } + btrfs_dev_replace_unlock(&root->fs_info->dev_replace, 0); do { seq = read_seqbegin(&root->fs_info->profiles_lock); @@ -1731,14 +1728,6 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) root->fs_info->avail_metadata_alloc_bits; } while (read_seqretry(&root->fs_info->profiles_lock, seq)); - num_devices = root->fs_info->fs_devices->num_devices; - btrfs_dev_replace_lock(&root->fs_info->dev_replace, 0); - if (btrfs_dev_replace_is_ongoing(&root->fs_info->dev_replace)) { - WARN_ON(num_devices < 1); - num_devices--; - } - btrfs_dev_replace_unlock(&root->fs_info->dev_replace, 0); - if ((all_avail & BTRFS_BLOCK_GROUP_RAID10) && num_devices <= 4) { ret = BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET; goto out; @@ -1760,6 +1749,30 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) goto out; } +out: + return ret; +} + +int btrfs_rm_device(struct btrfs_root *root, char *device_path) +{ + struct btrfs_device *device; + struct btrfs_device *next_device; + struct block_device *bdev; + struct buffer_head *bh = NULL; + struct btrfs_super_block *disk_super; + struct btrfs_fs_devices *cur_devices; + u64 devid; + u64 num_devices; + u8 *dev_uuid; + int ret = 0; + bool clear_super = false; + + mutex_lock(&uuid_mutex); + + ret = __check_raid_min_devices(root); + if (ret) + goto out; + if (strcmp(device_path, "missing") == 0) { struct list_head *devices; struct btrfs_device *tmp; -- 2.7.4