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NFSD: Write verifier might go backwards
authorChuck Lever <chuck.lever@oracle.com>
Thu, 30 Dec 2021 15:26:18 +0000 (10:26 -0500)
committerChuck Lever <chuck.lever@oracle.com>
Sat, 8 Jan 2022 19:42:02 +0000 (14:42 -0500)
commitcdc556600c0133575487cc69fb3128440b3c3e92
tree92edd125eee8a4d0e952ad936080a0b3b78fbcc2tree
parenta2f4c3fa4db94ba44d32a72201927cfd132a8e82commit | diff
NFSD: Write verifier might go backwards

When vfs_iter_write() starts to fail because a file system is full,
a bunch of writes can fail at once with ENOSPC. These writes
repeatedly invoke nfsd_reset_boot_verifier() in quick succession.

Ensure that the time it grabs doesn't go backwards due to an ntp
adjustment going on at the same time.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
fs/nfsd/nfssvc.c diff | blob | history
XArray, radix tree and IDR