From: Trond Myklebust <trondmy@gmail.com>
To: linux-nfs@vger.kernel.org
Subject: [PATCH 1/5] NFS: Don't refresh attributes with mounted-on-file information
Date: Tue, 13 Aug 2019 10:28:02 -0400 [thread overview]
Message-ID: <20190813142806.123268-1-trond.myklebust@hammerspace.com> (raw)
If we've been given the attributes of the mounted-on-file, then do not
use those to check or update the attributes on the application-visible
inode.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
fs/nfs/inode.c | 33 +++++++++++++++++++--------------
1 file changed, 19 insertions(+), 14 deletions(-)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 8a1758200b57..c764cfe456e5 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1403,12 +1403,21 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
return 0;
+ /* No fileid? Just exit */
+ if (!(fattr->valid & NFS_ATTR_FATTR_FILEID))
+ return 0;
/* Has the inode gone and changed behind our back? */
- if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
+ if (nfsi->fileid != fattr->fileid) {
+ /* Is this perhaps the mounted-on fileid? */
+ if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
+ nfsi->fileid == fattr->mounted_on_fileid)
+ return 0;
return -ESTALE;
+ }
if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
return -ESTALE;
+
if (!nfs_file_has_buffered_writers(nfsi)) {
/* Verify a few of the more important attributes */
if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
@@ -1768,18 +1777,6 @@ int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fa
EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
-static inline bool nfs_fileid_valid(struct nfs_inode *nfsi,
- struct nfs_fattr *fattr)
-{
- bool ret1 = true, ret2 = true;
-
- if (fattr->valid & NFS_ATTR_FATTR_FILEID)
- ret1 = (nfsi->fileid == fattr->fileid);
- if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
- ret2 = (nfsi->fileid == fattr->mounted_on_fileid);
- return ret1 || ret2;
-}
-
/*
* Many nfs protocol calls return the new file attributes after
* an operation. Here we update the inode to reflect the state
@@ -1810,7 +1807,15 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
nfs_display_fhandle_hash(NFS_FH(inode)),
atomic_read(&inode->i_count), fattr->valid);
- if (!nfs_fileid_valid(nfsi, fattr)) {
+ /* No fileid? Just exit */
+ if (!(fattr->valid & NFS_ATTR_FATTR_FILEID))
+ return 0;
+ /* Has the inode gone and changed behind our back? */
+ if (nfsi->fileid != fattr->fileid) {
+ /* Is this perhaps the mounted-on fileid? */
+ if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
+ nfsi->fileid == fattr->mounted_on_fileid)
+ return 0;
printk(KERN_ERR "NFS: server %s error: fileid changed\n"
"fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
NFS_SERVER(inode)->nfs_client->cl_hostname,
--
2.21.0
next reply other threads:[~2019-08-13 14:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-13 14:28 Trond Myklebust [this message]
2019-08-13 14:28 ` [PATCH 2/5] NFSv4: Fix return values for nfs4_file_open() Trond Myklebust
2019-08-13 14:28 ` [PATCH 3/5] NFSv4: Fix return value in nfs_finish_open() Trond Myklebust
2019-08-13 14:28 ` [PATCH 4/5] NFSv4/pnfs: Fix a page lock leak in nfs_pageio_resend() Trond Myklebust
2019-08-13 14:28 ` [PATCH 5/5] NFS: Ensure O_DIRECT reports an error if the bytes read/written is 0 Trond Myklebust
2019-08-13 17:55 ` [PATCH 4/5] NFSv4/pnfs: Fix a page lock leak in nfs_pageio_resend() Sasha Levin
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