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btrfs-progs: fix search tree v2 ioctl detection 

The result of the test applies per-filesystem, so we can't simply cache
it. The function hasn't been used yet.

Signed-off-by: David Sterba <dsterba@suse.com>
master
David Sterba 2016-11-07 13:02:00 +01:00
parent 92576929fb
commit 3934ba255d
1 changed files with 7 additions and 10 deletions
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17
utils.c
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@ -3825,6 +3825,10 @@ u64 get_partition_size(const char *dev)
return result;
}
/*
* Check if the BTRFS_IOC_TREE_SEARCH_V2 ioctl is supported on a given
* filesystem, opened at fd
*/
int btrfs_tree_search2_ioctl_supported(int fd)
{
struct btrfs_ioctl_search_args_v2 *args2;
@ -3832,10 +3836,6 @@ int btrfs_tree_search2_ioctl_supported(int fd)
int args2_size = 1024;
char args2_buf[args2_size];
int ret;
static int v2_supported = -1;
if (v2_supported != -1)
return v2_supported;
args2 = (struct btrfs_ioctl_search_args_v2 *)args2_buf;
sk = &(args2->key);
@ -3856,13 +3856,10 @@ int btrfs_tree_search2_ioctl_supported(int fd)
args2->buf_size = args2_size - sizeof(struct btrfs_ioctl_search_args_v2);
ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH_V2, args2);
if (ret == -EOPNOTSUPP)
v2_supported = 0;
return 0;
else if (ret == 0)
v2_supported = 1;
else
return ret;
return v2_supported;
return 1;
return ret;
}
int btrfs_check_nodesize(u32 nodesize, u32 sectorsize, u64 features)