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| author | Chuck Lever <chuck.lever@oracle.com> | 2015-05-07 00:26:58 +0200 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-05-13 20:56:03 +0200 |
| commit | 6b19687563fa6f385ac314afa30b7579e8c3174c (patch) | |
| tree | a7cd752f3ec84a8a10545071d409d92c080cb77e /fs/nfs | |
| parent | Linux 4.1-rc3 (diff) | |
| download | linux-6b19687563fa6f385ac314afa30b7579e8c3174c.tar.xz linux-6b19687563fa6f385ac314afa30b7579e8c3174c.zip | |
nfs: stat(2) fails during cthon04 basic test5 on NFSv4.0
When running the Connectathon basic tests against a Solaris NFS
server over NFSv4.0, test5 reports that stat(2) returns a file size
of zero instead of 1MB.
On success, nfs_commit_inode() can return a positive result; see
other call sites such as nfs_file_fsync_commit() and
nfs_commit_unstable_pages().
The call site recently added in nfs_wb_all() does not prevent that
positive return value from leaking to its callers. If it leaks
through nfs_sync_inode() back to nfs_getattr(), that causes stat(2)
to return a positive return value to user space while also not
filling in the passed-in struct stat.
Additional clean up: the new logic in nfs_wb_all() is rewritten in
bfields-normal form.
Fixes: 5bb89b4702e2 ("NFSv4.1/pnfs: Separate out metadata . . .")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/write.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c index d12a4be613a5..dfc19f1575a1 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1845,12 +1845,15 @@ int nfs_wb_all(struct inode *inode) trace_nfs_writeback_inode_enter(inode); ret = filemap_write_and_wait(inode->i_mapping); - if (!ret) { - ret = nfs_commit_inode(inode, FLUSH_SYNC); - if (!ret) - pnfs_sync_inode(inode, true); - } + if (ret) + goto out; + ret = nfs_commit_inode(inode, FLUSH_SYNC); + if (ret < 0) + goto out; + pnfs_sync_inode(inode, true); + ret = 0; +out: trace_nfs_writeback_inode_exit(inode, ret); return ret; } |