CREATE with EXCLUSIVE mode on RHEL NFSv3 client(RHEL6 or RHEL7) creates unexpected uid, gid ownership file even though the original file is root:root (0:0) with HP-UX NFS server.
Issue
- CREATE with EXCLUSIVE mode on RHEL NFS client(RHEL6 or RHEL7) creates unexpected uid, gid ownership file even though the original file is root:root (0:0).
-
For example, cp command in RHEL6 or later uses O_EXCL flag when the command creates or opens a file. Trying to copy a file belongs to root:root to a NFS share sometimes causes unexpected uid or/and gid.
-
NFS client's CREATE call.
3160 Network File System, CREATE Call DH: 0xdaf6f3a0/test.log1 Mode: EXCLUSIVE 3161 [Program Version: 3] 3162 [V3 Procedure: CREATE (8)] 3163 where 3164 dir 3165 length: 32 3166 [hash (CRC-32): 0xdaf6f3a0] 3167 filehandle: 40000003ffffffff000a000000000dde59a31b72000a0000... 3168 Name: test.log1 3169 length: 9 3170 contents: test.log1 3171 fill bytes: opaque data 3172 Create Mode: EXCLUSIVE (2) 3173 Verifier: Opaque Data -
NFS server's CREATE reply
3280 Network File System, CREATE Reply 3281 [Program Version: 3] 3282 [V3 Procedure: CREATE (8)] 3283 Status: NFS3_OK (0) 3284 obj 3285 handle_follow: value follows (1) 3286 handle 3287 length: 32 3288 [hash (CRC-32): 0xe9e31a36] 3289 [Name: test.log1] 3290 filehandle: 40000003ffffffff000a0000000012366793d09c000a0000... 3291 obj_attributes Regular File mode: 0000 uid: 0 gid: 912711000 3292 attributes_follow: value follows (1) 3293 attributes Regular File mode: 0000 uid: 0 gid: 912711000 3294 Type: Regular File (1) 3295 Mode: 0 3296 .... .... .... .... .... 0... .... .... = S_ISUID: No 3297 .... .... .... .... .... .0.. .... .... = S_ISGID: No 3298 .... .... .... .... .... ..0. .... .... = S_ISVTX: No 3299 .... .... .... .... .... ...0 .... .... = S_IRUSR: No 3300 .... .... .... .... .... .... 0... .... = S_IWUSR: No 3301 .... .... .... .... .... .... .0.. .... = S_IXUSR: No 3302 .... .... .... .... .... .... ..0. .... = S_IRGRP: No 3303 .... .... .... .... .... .... ...0 .... = S_IWGRP: No 3304 .... .... .... .... .... .... .... 0... = S_IXGRP: No 3305 .... .... .... .... .... .... .... .0.. = S_IROTH: No 3306 .... .... .... .... .... .... .... ..0. = S_IWOTH: No 3307 .... .... .... .... .... .... .... ...0 = S_IXOTH: No 3308 nlink: 1 3309 uid: 0 3310 gid: 912711000 <---- HERE
-
Environment
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- NFS v3
- NFS server is HP-UX 11v3
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.
