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btrfs-progs: add helper to wait for subvolume cleaning 

Signed-off-by: David Sterba <dsterba@suse.cz>
master
David Sterba 2015-04-08 18:15:57 +02:00
parent c9f885ec89
commit 76a9be2e72
1 changed files with 61 additions and 49 deletions
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110
cmds-subvolume.c
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@ -36,6 +36,66 @@
#include "btrfs-list.h"
#include "utils.h"
static int is_subvolume_cleaned(int fd, u64 subvolid)
{
int ret;
struct btrfs_ioctl_search_args args;
struct btrfs_ioctl_search_key *sk = &args.key;
sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
sk->min_objectid = subvolid;
sk->max_objectid = subvolid;
sk->min_type = BTRFS_ROOT_ITEM_KEY;
sk->max_type = BTRFS_ROOT_ITEM_KEY;
sk->min_offset = 0;
sk->max_offset = (u64)-1;
sk->min_transid = 0;
sk->max_transid = (u64)-1;
sk->nr_items = 1;
ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
if (ret < 0)
return -errno;
if (sk->nr_items == 0)
return 1;
return 0;
}
static int wait_for_subvolume_cleaning(int fd, int count, u64 *ids,
int sleep_interval)
{
int ret = 0;
int remaining;
int i;
remaining = count;
while (1) {
for (i = 0; i < count; i++) {
if (!ids[i])
continue;
ret = is_subvolume_cleaned(fd, ids[i]);
if (ret < 0) {
fprintf(stderr,
"ERROR: can't perform the search - %s\n",
strerror(-ret));
goto out;
}
if (ret) {
printf("Subvolume id %llu is gone\n", ids[i]);
ids[i] = 0;
remaining--;
}
}
if (!remaining)
break;
sleep(sleep_interval);
}
out:
return ret;
}
static const char * const subvolume_cmd_group_usage[] = {
"btrfs subvolume <command> <args>",
NULL
@ -1036,33 +1096,6 @@ static const char * const cmd_subvol_sync_usage[] = {
NULL
};
static int is_subvolume_cleaned(int fd, u64 subvolid)
{
int ret;
struct btrfs_ioctl_search_args args;
struct btrfs_ioctl_search_key *sk = &args.key;
sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
sk->min_objectid = subvolid;
sk->max_objectid = subvolid;
sk->min_type = BTRFS_ROOT_ITEM_KEY;
sk->max_type = BTRFS_ROOT_ITEM_KEY;
sk->min_offset = 0;
sk->max_offset = (u64)-1;
sk->min_transid = 0;
sk->max_transid = (u64)-1;
sk->nr_items = 1;
ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
if (ret < 0)
return -errno;
if (sk->nr_items == 0)
return 1;
return 0;
}
#if 0
/*
* If we're looking for any dead subvolume, take a shortcut and look
@ -1212,7 +1245,6 @@ static int cmd_subvol_sync(int argc, char **argv)
DIR *dirstream = NULL;
u64 *ids = NULL;
int id_count;
int remaining;
int sleep_interval = 1;
optind = 1;
@ -1303,27 +1335,7 @@ static int cmd_subvol_sync(int argc, char **argv)
}
}
remaining = id_count;
while (1) {
for (i = 0; i < id_count; i++) {
if (!ids[i])
continue;
ret = is_subvolume_cleaned(fd, ids[i]);
if (ret < 0) {
fprintf(stderr, "ERROR: can't perform the search - %s\n",
strerror(-ret));
goto out;
}
if (ret) {
printf("Subvolume id %llu is gone\n", ids[i]);
ids[i] = 0;
remaining--;
}
}
if (!remaining)
break;
sleep(sleep_interval);
}
ret = wait_for_subvolume_cleaning(fd, id_count, ids, sleep_interval);
out:
free(ids);