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NFS: Trace lookup revalidation failure

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Enable tracing of lookup revalidation failures.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust
2022-02-19 20:38:19 -05:00
parent 1a93b82c59
commit 2eef8a3111
1 changed files with 5 additions and 12 deletions
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17
fs/nfs/dir.c
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@@ -1474,9 +1474,7 @@ nfs_lookup_revalidate_done(struct inode *dir, struct dentry *dentry,
{
switch (error) {
case 1:
dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is valid\n",
__func__, dentry);
return 1;
break;
case 0:
/*
* We can't d_drop the root of a disconnected tree:
@@ -1485,13 +1483,10 @@ nfs_lookup_revalidate_done(struct inode *dir, struct dentry *dentry,
* inodes on unmount and further oopses.
*/
if (inode && IS_ROOT(dentry))
return 1;
dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is invalid\n",
__func__, dentry);
return 0;
error = 1;
break;
}
dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) lookup returned error %d\n",
__func__, dentry, error);
trace_nfs_lookup_revalidate_exit(dir, dentry, 0, error);
return error;
}
@@ -1623,9 +1618,7 @@ nfs_do_lookup_revalidate(struct inode *dir, struct dentry *dentry,
goto out_bad;
trace_nfs_lookup_revalidate_enter(dir, dentry, flags);
error = nfs_lookup_revalidate_dentry(dir, dentry, inode);
trace_nfs_lookup_revalidate_exit(dir, dentry, flags, error);
return error;
return nfs_lookup_revalidate_dentry(dir, dentry, inode);
out_valid:
return nfs_lookup_revalidate_done(dir, dentry, inode, 1);
out_bad: