Wrong Container-Size

[warmup72]

I´m using gocryptfs v1.6.1 on osx 10.14.3

After setting up and mounting a new Container the "finder Information" Reports 55TB free disk Memory.
This seems to be wrong, because my SSD unforunally has only 256GB :-)

[rfjakob]

Hi! Thanks for the report. Looks like reverse mode has the same problem: #274

Can you post the output of df -k ? Are we wrong by a factor of 256 ?

[rfjakob]

Update: can you run statfs.darwin.tar.gz against a mounted gocryptfs, and against the underlying filesystem? For me, on Linux, it looks like this. "Blocks" and "Bsize" are identical for both, and df reports the right size:

$ ./statfs /tmp/gocryptfs.mnt
{
	"Type": 1702057286,
	"Bsize": 4096,
	"Blocks": 1002783,
	"Bfree": 1002751,
	"Bavail": 1002751,
	"Files": 1002783,
	"Ffree": 1002704,
	"Fsid": {
		"X__val": [
			0,
			0
		]
	},
	"Namelen": 255,
	"Frsize": 4096,
	"Flags": 4134,
	"Spare": [
		0,
		0,
		0,
		0
	]
}

$ ./statfs /tmp
{
	"Type": 16914836,
	"Bsize": 4096,
	"Blocks": 1002783,
	"Bfree": 1002751,
	"Bavail": 1002751,
	"Files": 1002783,
	"Ffree": 1002704,
	"Fsid": {
		"X__val": [
			0,
			0
		]
	},
	"Namelen": 255,
	"Frsize": 4096,
	"Flags": 38,
	"Spare": [
		0,
		0,
		0,
		0
	]
}

[warmup72]

Hi, thanks for Your answer. My output looks a little differenz:
Crypt-Path

{
	"Bsize": 4096,
	"Iosize": 1048576,
	"Blocks": 61228134,
	"Bfree": 11793725,
	"Bavail": 10836789,
	"Files": 9223372036854775807,
	"Ffree": 9223372036853495114,
	"Fsid": {
		"Val": [
			16777220,
			25
		]
	},
	"Owner": 0,
	"Type": 25,
	"Flags": 75550720,
	"Fssubtype": 1,
	"Fstypename": [
		97,
		112,
		102,
		115,
		0,
		0,
		0,
		0,
		0,
		0,
		0,
		0,
		0,
		0,
		0,
		0
	],

Mount-Path:

{
	"Bsize": 1048576,
	"Iosize": 1048576,
	"Blocks": 61228134,
	"Bfree": 11793720,
	"Bavail": 10836784,
	"Files": 9223372036854775807,
	"Ffree": 9223372036853495114,
	"Fsid": {
		"Val": [
			905969729,
			30
		]
	},
	"Owner": 501,
	"Type": 30,
	"Flags": 26,
	"Fssubtype": 0,
	"Fstypename": [
		111,
		115,
		120,
		102,
		117,
		115,
		101,
		0,
		0,
		0,
		0,
		0,
		0,
		0,
		0,
		0
	],

[rfjakob]

Perfect, thanks! I think I have that fixed, can you try
gocryptfs.statfs-darwin.tar.gz ?

[warmup72]

Yes that´s it!
Perfect! The viewed size is now correct!

[rfjakob]

Fixed via hanwen/go-fuse@161a164 , thanks!

[jollino]

Hi, apologies for resurrecting this old thread but I'm having a related issue on macOS 14.5 (Darwin 23.5.0).

I created a directory on my boot SSD, encrypted and mounted it. The "main" disk is shown as having 154 GB free in the Finder, while the encrypted volume claims to have 130 GB.

df shows the following (skipping lines about external, unrelated disks)

Filesystem                             Size    Used   Avail Capacity iused ifree %iused  Mounted on
/dev/disk3s1s1                        460Gi   9.6Gi   121Gi     8%    404k  1.3G    0%   /
devfs                                 247Ki   247Ki     0Bi   100%     855     0  100%   /dev
/dev/disk3s6                          460Gi   6.0Gi   121Gi     5%       6  1.3G    0%   /System/Volumes/VM
/dev/disk3s2                          460Gi   5.7Gi   121Gi     5%    1.1k  1.3G    0%   /System/Volumes/Preboot
/dev/disk3s4                          460Gi    18Mi   121Gi     1%      56  1.3G    0%   /System/Volumes/Update
/dev/disk1s2                          500Mi   6.0Mi   481Mi     2%       1  4.9M    0%   /System/Volumes/xarts
/dev/disk1s1                          500Mi   6.2Mi   481Mi     2%      32  4.9M    0%   /System/Volumes/iSCPreboot
/dev/disk1s3                          500Mi   1.6Mi   481Mi     1%      58  4.9M    0%   /System/Volumes/Hardware
/dev/disk3s5                          460Gi   317Gi   121Gi    73%    2.8M  1.3G    0%   /System/Volumes/Data
map auto_home                           0Bi     0Bi     0Bi   100%       0     0     -   /System/Volumes/Data/home
/tmp/_/orig                           460Gi   339Gi   121Gi    74%    2.8M  1.3G    0%   /private/tmp/_/crypt

I just recompiled gocryptfs from the current git repository to ensure that I was using the latest version of everything (gocryptfs v2.4.0-33-gf06f27e; go-fuse v2.5.0; 2024-07-08 go1.22.5 darwin/arm64).

These are the results of runnning statfs on both directories, both empty:
statfs_apfs.txt
statfs_fusefs.txt

I'm afraid I am not really familiar with fuse or proficient enough with Go to even consider figuring it out myself, but I'll be more than happy to run any other tests. :)

EDIT: I also tried creating one on my NAS, and it's even odder. The Finder reports 4.23 TB free on the network volume (via SMB), but the mounted filesystem reports 529.3.

Again the relevant df, slightly redacted:

Filesystem                             Size    Used   Avail Capacity iused ifree %iused  Mounted on
//username@host._smb._tcp.local/home   21Ti    18Ti   3.9Ti    83%     19G  4.1G   82%   /Volumes/home
/Volumes/home/username/directory      2.7Ti   2.2Ti   493Gi    83%     19G  4.1G   82%   /private/tmp/mount

And the statfs results:
statfs_nas_fusefs.txt
statfs_nas_smb.txt

Note that in this case the encrypted folder contains about 370 GB / 344 GiB of data.