Bug 479670
| Summary: | fix the failure of file creation from hpux client | ||||||
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| Product: | Red Hat Enterprise Linux 5 | Reporter: | Wengang Wang <wen.gang.wang> | ||||
| Component: | kernel | Assignee: | Red Hat Kernel Manager <kernel-mgr> | ||||
| Status: | CLOSED DUPLICATE | QA Contact: | Red Hat Kernel QE team <kernel-qe> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | low | ||||||
| Version: | 5.2 | CC: | bfields, fleite, greg.marsden, jlayton, rwheeler, sprabhu | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| URL: | https://bug.oraclecorp.com/pls/bug/webbug_print.show?c_rptno=7579314 | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2010-10-04 17:40:53 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Created attachment 364209 [details]
the patch fixes the problem(back porting from mainline 4ac35c2f794503d3acda20d98e89cf63f6e94332)
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sometimes HPUX nfs client sends a create request to linux nfs server(v2/v3). the dump of the request is like: obj_attributes mode: value follows set_it: value follows (1) mode: 00 uid: no value set_it: no value (0) gid: value follows set_it: value follows (1) gid: 8030 size: value follows set_it: value follows (1) size: 0 atime: don't change set_it: don't change (0) mtime: don't change set_it: don't change (0) note that mode is 00(havs no rwx privilege even for the owner) and it requires to set size to 0. as current nfsd(v2/v3) implementation, the server does mainly 2 steps: 1) creates the file in mode specified by calling vfs_create(). 2) sets attributes for the file by calling nfsd_setattr(). at step 2), it finally calls file system specific setattr() function which may fails when checking permission because changing size needs WRITE privilege but it has no since mode is 000. for this case, a new file created, we may simply ignore the request of setting size to 0. so that the WRITE privilege is not needed and finally succeed. attached is the patch for this problem. please have it included in next release if it's suitable.