On 3 Jan 2025, at 18:07, Takeshi Nishimura wrote: > On Thu, Jan 2, 2025 at 4:38 PM Benjamin Coddington <bcodding@xxxxxxxxxx> wrote: >> >> On 26 Dec 2024, at 19:45, Takeshi Nishimura wrote: >> >>> Dear list, >>> >>> Is there a document which explains the structure of the Linux >>> NFSv4.1/4.2 client source code? >> >> No, I don't believe there is any such document. >> >>> And where can I find the code which negotiates between NFSv4.1 and >>> NFSv4.2 versions, and a potential NFSv4.3? >> >> For the client, that code is in the nfs-utils tree in the mount.nfs binary, >> source in utils/mount/stropts.c - look for "nfs_autonegotiate()". If the >> mount command does not specify exactly the minor version, then a mount is >> tried with decreasing minor versions. > > So mount.nfs adds vers=4.2, if that fails it retries with vers=4.1, vers=4.0? > > Where in the kernel is the minor version from the parsed vers=4.2 option used? Start looking around in fs/nfs/fs_context.c for "minorversion".. Ben
