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nfsd: Fix error return values for nfsd4_clone_file_range() 

If the parameter 'count' is non-zero, nfsd4_clone_file_range() will
currently clobber all errors returned by vfs_clone_file_range() and
replace them with EINVAL.

Fixes: 42ec3d4c02 ("vfs: make remap_file_range functions take and...")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org # v4.20+
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2019-01-21 15:58:38 -05:00 committed by J. Bruce Fields
parent 8834f5600c
commit e3fdc89ca4
1 changed files with 4 additions and 2 deletions
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6
fs/nfsd/vfs.c
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@ -557,9 +557,11 @@ __be32 nfsd4_clone_file_range(struct file *src, u64 src_pos, struct file *dst,
loff_t cloned;
cloned = vfs_clone_file_range(src, src_pos, dst, dst_pos, count, 0);
if (cloned < 0)
return nfserrno(cloned);
if (count && cloned != count)
cloned = -EINVAL;
return nfserrno(cloned < 0 ? cloned : 0);
return nfserrno(-EINVAL);
return 0;
}
ssize_t nfsd_copy_file_range(struct file *src, u64 src_pos, struct file *dst,