Commit 66a2823c authored by Goldwyn Rodrigues's avatar Goldwyn Rodrigues Committed by David Sterba

btrfs: sysfs: export currently running exclusive operation

/sys/fs/<fsid>/exclusive_operation contains the currently executing
exclusive operation. Add a sysfs_notify() when operation end, so
userspace can be notified of exclusive operation is finished.
Reviewed-by: default avatarNikolay Borisov <nborisov@suse.com>
Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarGoldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent c3e1f96c
...@@ -387,6 +387,7 @@ bool btrfs_exclop_start(struct btrfs_fs_info *fs_info, ...@@ -387,6 +387,7 @@ bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
void btrfs_exclop_finish(struct btrfs_fs_info *fs_info) void btrfs_exclop_finish(struct btrfs_fs_info *fs_info)
{ {
WRITE_ONCE(fs_info->exclusive_operation, BTRFS_EXCLOP_NONE); WRITE_ONCE(fs_info->exclusive_operation, BTRFS_EXCLOP_NONE);
sysfs_notify(&fs_info->fs_devices->fsid_kobj, NULL, "exclusive_operation");
} }
/* /*
......
...@@ -809,6 +809,42 @@ static ssize_t btrfs_checksum_show(struct kobject *kobj, ...@@ -809,6 +809,42 @@ static ssize_t btrfs_checksum_show(struct kobject *kobj,
BTRFS_ATTR(, checksum, btrfs_checksum_show); BTRFS_ATTR(, checksum, btrfs_checksum_show);
static ssize_t btrfs_exclusive_operation_show(struct kobject *kobj,
struct kobj_attribute *a, char *buf)
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
const char *str;
switch (READ_ONCE(fs_info->exclusive_operation)) {
case BTRFS_EXCLOP_NONE:
str = "none\n";
break;
case BTRFS_EXCLOP_BALANCE:
str = "balance\n";
break;
case BTRFS_EXCLOP_DEV_ADD:
str = "device add\n";
break;
case BTRFS_EXCLOP_DEV_REMOVE:
str = "device remove\n";
break;
case BTRFS_EXCLOP_DEV_REPLACE:
str = "device replace\n";
break;
case BTRFS_EXCLOP_RESIZE:
str = "resize\n";
break;
case BTRFS_EXCLOP_SWAP_ACTIVATE:
str = "swap activate\n";
break;
default:
str = "UNKNOWN\n";
break;
}
return scnprintf(buf, PAGE_SIZE, "%s", str);
}
BTRFS_ATTR(, exclusive_operation, btrfs_exclusive_operation_show);
static const struct attribute *btrfs_attrs[] = { static const struct attribute *btrfs_attrs[] = {
BTRFS_ATTR_PTR(, label), BTRFS_ATTR_PTR(, label),
BTRFS_ATTR_PTR(, nodesize), BTRFS_ATTR_PTR(, nodesize),
...@@ -817,6 +853,7 @@ static const struct attribute *btrfs_attrs[] = { ...@@ -817,6 +853,7 @@ static const struct attribute *btrfs_attrs[] = {
BTRFS_ATTR_PTR(, quota_override), BTRFS_ATTR_PTR(, quota_override),
BTRFS_ATTR_PTR(, metadata_uuid), BTRFS_ATTR_PTR(, metadata_uuid),
BTRFS_ATTR_PTR(, checksum), BTRFS_ATTR_PTR(, checksum),
BTRFS_ATTR_PTR(, exclusive_operation),
NULL, NULL,
}; };
......
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