Bug 213927
| Summary: | CIFS: can't create file or directory when mount with modefromsid | ||
|---|---|---|---|
| Product: | File System | Reporter: | Xiaoli Feng (fengxiaoli0714) |
| Component: | CIFS | Assignee: | fs_cifs (fs_cifs) |
| Status: | NEW --- | ||
| Severity: | high | CC: | nspmangalore, smfrench |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 5.14.0-rc2 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: |
network trace
dmesg log |
||
Created attachment 298127 [details]
dmesg log
samba server also has this issue. # mount //localhost/cifs cifs -o modefromsid,user=root,password=redhat # touch cifs/file touch: setting times of 'cifs/file': No such file or directory # mkdir cifs/dir mkdir: cannot create directory ‘cifs/dir’: Invalid argument # cat /etc/samba/smb.conf [cifs] path=/mnt/cifs writeable=yes Can you try using idsfromsid in combination with modefromsid? (This should probably be set implicitly. I'll submit that change soon) sprasad@lindev-local:/mnt/windows$ mount -t cifs //192.168.10.1/Shared on /mnt/windows type cifs (rw,relatime,vers=3.1.1,cache=strict,username=sprasad,uid=1000,noforceuid,gid=1000,noforcegid,addr=192.168.10.1,file_mode=0777,dir_mode=0777,soft,nounix,idsfromsid,serverino,mapposix,modefromsid,rsize=4194304,wsize=4194304,bsize=1048576,echo_interval=60,actimeo=1) sprasad@lindev-local:/mnt/windows$ mkdir cifstest sprasad@lindev-local:/mnt/windows$ This is not related to the mount API change (the regression also happens in 5.10 kernel e.g.) and is due instead to the server not accepting using the "default" user and group (when the user and group SID is not specified) on create with SecurityDescriptor - this change to allow the mode to be specified on create was made earlier than 5.10 kernel. It works in 5.9 but fails in 5.10. The main difference I see is the length of the security descriptor context is smaller in 5.10 and later (180 bytes SD context blob length worked vs. 76 bytes in SD fails with invalid parameter) |
Created attachment 298125 [details] network trace Mount windows server 2012 file server on linux 5.14.0 with modefromsid. I can't create file or directory in this mountpoint. Can do these operations without modefromsid. This is a regression issue after switch to new mount API. # mount //$WIN_SERVER/cifs cifs -o modefromsid,user=administrator,password=$WINPASSWD # touch cifs/file touch: setting times of 'cifs/file': No such file or directory # mkdir cifs/dira mkdir: cannot create directory ‘cifs/dira’: Invalid argument # uname -r 5.14.0-rc2+