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btrfs: add helper for device path or missing 

This patch creates a helper function to get either the rcu device path
or missing.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
[ rename to btrfs_dev_name, switch to if/else ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2017-11-28 10:43:10 +08:00 committed by David Sterba
parent 38b5f68e98
commit 3c958bd23b
1 changed files with 14 additions and 11 deletions
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25
fs/btrfs/dev-replace.c
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@ -304,6 +304,14 @@ void btrfs_after_dev_replace_commit(struct btrfs_fs_info *fs_info)
dev_replace->cursor_left_last_write_of_item;
}
static char* btrfs_dev_name(struct btrfs_device *device)
{
if (device->missing)
return "<missing disk>";
else
return rcu_str_deref(device->name);
}
int btrfs_dev_replace_start(struct btrfs_fs_info *fs_info,
const char *tgtdev_name, u64 srcdevid, const char *srcdev_name,
int read_src)
@ -363,8 +371,7 @@ int btrfs_dev_replace_start(struct btrfs_fs_info *fs_info,
btrfs_info_in_rcu(fs_info,
"dev_replace from %s (devid %llu) to %s started",
src_device->missing ? "<missing disk>" :
rcu_str_deref(src_device->name),
btrfs_dev_name(src_device),
src_device->devid,
rcu_str_deref(tgt_device->name));
@ -538,8 +545,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
} else {
btrfs_err_in_rcu(fs_info,
"btrfs_scrub_dev(%s, %llu, %s) failed %d",
src_device->missing ? "<missing disk>" :
rcu_str_deref(src_device->name),
btrfs_dev_name(src_device),
src_device->devid,
rcu_str_deref(tgt_device->name), scrub_ret);
btrfs_dev_replace_unlock(dev_replace, 1);
@ -557,8 +563,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
btrfs_info_in_rcu(fs_info,
"dev_replace from %s (devid %llu) to %s finished",
src_device->missing ? "<missing disk>" :
rcu_str_deref(src_device->name),
btrfs_dev_name(src_device),
src_device->devid,
rcu_str_deref(tgt_device->name));
tgt_device->is_tgtdev_for_dev_replace = 0;
@ -814,12 +819,10 @@ static int btrfs_dev_replace_kthread(void *data)
progress = btrfs_dev_replace_progress(fs_info);
progress = div_u64(progress, 10);
btrfs_info_in_rcu(fs_info,
"continuing dev_replace from %s (devid %llu) to %s @%u%%",
dev_replace->srcdev->missing ? "<missing disk>"
: rcu_str_deref(dev_replace->srcdev->name),
"continuing dev_replace from %s (devid %llu) to target %s @%u%%",
btrfs_dev_name(dev_replace->srcdev),
dev_replace->srcdev->devid,
dev_replace->tgtdev ? rcu_str_deref(dev_replace->tgtdev->name)
: "<missing target disk>",
btrfs_dev_name(dev_replace->tgtdev),
(unsigned int)progress);
btrfs_dev_replace_continue_on_mount(fs_info);