On Dec 4 22:42, Adam Dinwoodie wrote: > On Thu, Dec 04, 2014 at 04:27:51PM -0500, Dave Lindbergh wrote: > > You are more than welcome to read the strace output if that'll give > > you a clue (it doesn't give me one). All 1.7 MBytes of it are at > > http://nerdfever.com/files/strace.txt > > > > (That comes from "strace git clone > > https://github.com/nerdfever/pic32mx-bmf >strace.txt") > > > > I'm still stumped. > > Okay, I'm looking through this trace in the hope of finding something. > The below looks suspicious, but I'm not sufficiently familiar with > either Git or Cygwin internals to know (a) whether this is a problem at > all or (b) if it is a problem, whether it's a symptom of an earlier > problem I haven't spotted on my brief skim. > > 616 12330609 [main] git 2348 unlink_nt: Trying to delete > \??\Z:\pic32mx-bmf\.git\objects\30, isdir = 1 > 3190 12333799 [main] git 2348 unlink_nt: Setting delete disposition on > \??\Z:\pic32mx-bmf\.git\objects\30 failed, status = 0xC0000101 > 6362 12340161 [main] git 2348 unlink_nt: Try-to-bin > \??\Z:\pic32mx-bmf\.git\objects\30 > 24341 12364502 [main] git 2348 try_to_bin: > \??\Z:\pic32mx-bmf\.git\objects\30, return bin_status 3 > 645 12365147 [main] git 2348 unlink_nt: Try > \??\Z:\pic32mx-bmf\.git\objects\30 again > 12250 12377397 [main] git 2348 unlink_nt: Setting delete disposition on > \??\Z:\pic32mx-bmf\.git\objects\30 failed, status = 0xC0000101 > 22680 12400077 [main] git 2348 unlink_nt: Try > \??\Z:\pic32mx-bmf\.git\objects\30 again > 8487 12408564 [main] git 2348 unlink_nt: Setting delete disposition on > \??\Z:\pic32mx-bmf\.git\objects\30 failed, status = 0xC0000101 > 1903 12410467 [main] git 2348 unlink_nt: Try > \??\Z:\pic32mx-bmf\.git\objects\30 again > <above two lines repeated several more times>
First a sharing violation (not visible in the above snippet), then
directory not empty.
This seems to be the result of an earlier problem. What I found in
the strace is this:
- Create file Z:\pic32mx-bmf\.git\objects\30\tmp_obj_YljwNZ
- open file, write something, close file.
- link (Z:\pic32mx-bmf\.git\objects\30\tmp_obj_YljwNZ,
Z:\pic32mx-bmf\.git\objects\30\0bdeb2fd209d24afb865584da10b78aa8fefc4)
succeeds.
- unlink (Z:\pic32mx-bmf\.git\objects\30\tmp_obj_YljwNZ) succeeds
- Trying to open
Z:\pic32mx-bmf\.git\objects\30\0bdeb2fd209d24afb865584da10b78aa8fefc4
but the file doesn't exist and NtCreateFile fails with status
0xC0000034, STATUS_OBJECT_NAME_NOT_FOUND --> ENOENT.
- Subsequent unlink (Z:\pic32mx-bmf\.git\objects\30) fails with a
STATUS_DIRECTORY_NOT_EMPTY --> ENOTEMPTY.
- git seems to be prepared for such a case, the parent process calls
opendir/readdir on the directory. Enumerating the files in
Z:\pic32mx-bmf\.git\objects\30 shows the entries ".", ".." and
"0bdeb2fd209d24afb865584da10b78aa8fefc4".
- Then git calls lstat on the file, which results in NtOpenFile
returning status STATUS_OBJECT_NAME_NOT_FOUND again.
- From a POSIX POV this means "somebody else" deleted the file,
so the dir is empty now. Git tries to delete the directory again,
which again results in STATUS_DIRECTORY_NOT_EMPTY --> ENOTEMPTY
and, internally, a sharing violation which disallows to move the
directory out of the way.
This looks suspiciously like a bug in the remote filesystem. Link
succeeded, so there are two links to the same file in the directory.
Unlinking link 1 succeeds, so there's still one link to the file in the
directory, but link 2 is inaccessible as if the file has been deleted
completely. Thus, a full POSIX git on this drive is broken.
Can you please run
/usr/lib/csih/getVolInfo /cygdrive/z
and paste the output here? Maybe I can workaround this in the next
Cygwin version.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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