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NFSv4.2 fix handling of sr_eof in SEEK's reply

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[ Upstream commit 73f5c88f521a630ea1628beb9c2d48a2e777a419 ]

Currently the client ignores the value of the sr_eof of the SEEK
operation. According to the spec, if the server didn't find the
requested extent and reached the end of the file, the server
would return sr_eof=true. In case the request for DATA and no
data was found (ie in the middle of the hole), then the lseek
expects that ENXIO would be returned.

Fixes: 1c6dcbe5ce ("NFS: Implement SEEK")
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Olga Kornievskaia 2021-03-31 15:30:25 -04:00 committed by Greg Kroah-Hartman
parent 1fbea60ea6
commit bfeb4e607d
1 changed files with 4 additions and 1 deletions
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5
fs/nfs/nfs42proc.c
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@ -665,7 +665,10 @@ static loff_t _nfs42_proc_llseek(struct file *filep,
if (status)
return status;
return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
if (whence == SEEK_DATA && res.sr_eof)
return -NFS4ERR_NXIO;
else
return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
}
loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)