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| author | Trond Myklebust <trondmy@gmail.com> | 2020-01-06 13:40:33 -0500 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2020-01-22 16:25:41 -0500 |
| commit | 1b28d756b2eaee03e838390465754e431389e483 (patch) | |
| tree | 4363f1d9b488d526342a7b4a8418aff4926c030c | |
| parent | b66ae6dd0c30c750cbc5c633dea08712203abc03 (diff) | |
| download | linux-1b28d756b2eaee03e838390465754e431389e483.tar.bz2 | |
nfsd: Ensure exclusion between CLONE and WRITE errors
Ensure that we can distinguish between synchronous CLONE and
WRITE errors, and that we can assign them correctly.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/vfs.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 7950f2ea1d95..126149b06463 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -536,22 +536,33 @@ __be32 nfsd4_clone_file_range(struct nfsd_file *nf_src, u64 src_pos, struct file *src = nf_src->nf_file; struct file *dst = nf_dst->nf_file; loff_t cloned; + __be32 ret = 0; + down_write(&nf_dst->nf_rwsem); cloned = vfs_clone_file_range(src, src_pos, dst, dst_pos, count, 0); - if (cloned < 0) - return nfserrno(cloned); - if (count && cloned != count) - return nfserrno(-EINVAL); + if (cloned < 0) { + ret = nfserrno(cloned); + goto out_err; + } + if (count && cloned != count) { + ret = nfserrno(-EINVAL); + goto out_err; + } if (sync) { loff_t dst_end = count ? dst_pos + count - 1 : LLONG_MAX; int status = vfs_fsync_range(dst, dst_pos, dst_end, 0); if (!status) status = commit_inode_metadata(file_inode(src)); - if (status < 0) - return nfserrno(status); + if (status < 0) { + nfsd_reset_boot_verifier(net_generic(nf_dst->nf_net, + nfsd_net_id)); + ret = nfserrno(status); + } } - return 0; +out_err: + up_write(&nf_dst->nf_rwsem); + return ret; } ssize_t nfsd_copy_file_range(struct file *src, u64 src_pos, struct file *dst, |