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X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 2vJCeacK/DUlrgSjB6onqBSeEfizxk+7ACj7kemljhjCt5wY5MqNFlXT5CooXFMqi+XkHt9pAwGIs1KIJeAD3w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR10MB5771 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2024-12-10_07,2024-12-10_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 adultscore=0 phishscore=0 malwarescore=0 suspectscore=0 spamscore=0 mlxscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2411120000 definitions=main-2412100105 X-Proofpoint-GUID: LkOVYB8z-RK_ZhckcWYeXk0TMVBpjnkQ X-Proofpoint-ORIG-GUID: LkOVYB8z-RK_ZhckcWYeXk0TMVBpjnkQ On 12/10/24 7:13 AM, Cedric Blancher wrote: > On Sun, 8 Dec 2024 at 23:12, NeilBrown wrote: >>> + >>> + /* >>> + * |pnu.uctx->path| is in UTF-8, but we need the data >>> + * in the current local locale's encoding, as mount(2) >>> + * does not have something like a |MS_UTF8_SPEC| flag >>> + * to indicate that the input path is in UTF-8, >>> + * independently of the current locale >>> + */ >> >> I don't understand this comment at all. >> mount(2) doesn't care about locale (as far as I know). The "source" is >> simply a string of bytes that it is up to the filesystem to interpret. >> NFS will always interpret it as utf8. So no conversion is needed. > > Not all versions of NFS use UTF-8. For example if you have NFSv3 and > the server runs ISO8859-16 (French), then the filenames are encoded > using ISO8859-16, and the NFS client is assumed to use ISO8859-16 too. I'm still trying to understand the usefulness of supporting NFSv3 as well. I understand that your usage requirement is only NFSv4. However, does your comment mean that there might be some cases where a client administrator might want to mount with NFSv3 using non-ASCII characters (of any flavor) in the export path? I'm also wondering about non-ASCII characters in the server hostname. That does not depend on which NFS version is in play. > mount(2) has options to do filename encoding conversion > NFSv4 is an improvement compared to NFSv3 because it uses UTF-8 on the > wire, but if you use the (ANSSI/Clip-OS) nls=/iocharset= mount option > you can enable filename encoding conversion there. > > Traditionally it is assumed that the admin runs its shell in the > locale (implies filesystem encoding) used to do the mount(2), hence > the iconv() to make sure there is no encoding mismatch. > > Finally: Not everyone and everything will use English (we frog eaters > are proud of our language!) or UTF8, and it will remain that way for > the foreseeable future. I'll repeat: none of us are denigrating languages or usages here. We're attempting to clarify the problem statement and refine the use cases. -- Chuck Lever