From: Trond Myklebust <[email protected]>
If the revalidation was forced, due to the presence of a LOOKUP_EXCL or
a LOOKUP_REVAL flag, then readdirplus won't help. It also can't help
when we're doing a path component lookup.
Signed-off-by: Trond Myklebust <[email protected]>
---
fs/nfs/dir.c | 26 ++++++++++++++++----------
1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 5892c4ee3a6d..1da741dd2135 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -692,10 +692,13 @@ void nfs_readdir_record_entry_cache_miss(struct inode *dir)
}
}
-static void nfs_lookup_advise_force_readdirplus(struct inode *dir)
+static void nfs_lookup_advise_force_readdirplus(struct inode *dir,
+ unsigned int flags)
{
if (nfs_server_capable(dir, NFS_CAP_CASE_INSENSITIVE))
return;
+ if (flags & (LOOKUP_EXCL | LOOKUP_PARENT | LOOKUP_REVAL))
+ return;
nfs_readdir_record_entry_cache_miss(dir);
}
@@ -1594,15 +1597,17 @@ nfs_lookup_revalidate_delegated(struct inode *dir, struct dentry *dentry,
return nfs_lookup_revalidate_done(dir, dentry, inode, 1);
}
-static int
-nfs_lookup_revalidate_dentry(struct inode *dir, struct dentry *dentry,
- struct inode *inode)
+static int nfs_lookup_revalidate_dentry(struct inode *dir,
+ struct dentry *dentry,
+ struct inode *inode, unsigned int flags)
{
struct nfs_fh *fhandle;
struct nfs_fattr *fattr;
unsigned long dir_verifier;
int ret;
+ trace_nfs_lookup_revalidate_enter(dir, dentry, flags);
+
ret = -ENOMEM;
fhandle = nfs_alloc_fhandle();
fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode));
@@ -1623,6 +1628,10 @@ nfs_lookup_revalidate_dentry(struct inode *dir, struct dentry *dentry,
}
goto out;
}
+
+ /* Request help from readdirplus */
+ nfs_lookup_advise_force_readdirplus(dir, flags);
+
ret = 0;
if (nfs_compare_fh(NFS_FH(inode), fhandle))
goto out;
@@ -1632,8 +1641,6 @@ nfs_lookup_revalidate_dentry(struct inode *dir, struct dentry *dentry,
nfs_setsecurity(inode, fattr);
nfs_set_verifier(dentry, dir_verifier);
- /* set a readdirplus hint that we had a cache miss */
- nfs_lookup_advise_force_readdirplus(dir);
ret = 1;
out:
nfs_free_fattr(fattr);
@@ -1699,8 +1706,7 @@ nfs_do_lookup_revalidate(struct inode *dir, struct dentry *dentry,
if (NFS_STALE(inode))
goto out_bad;
- trace_nfs_lookup_revalidate_enter(dir, dentry, flags);
- return nfs_lookup_revalidate_dentry(dir, dentry, inode);
+ return nfs_lookup_revalidate_dentry(dir, dentry, inode, flags);
out_valid:
return nfs_lookup_revalidate_done(dir, dentry, inode, 1);
out_bad:
@@ -1894,7 +1900,7 @@ struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned in
goto out;
/* Notify readdir to use READDIRPLUS */
- nfs_lookup_advise_force_readdirplus(dir);
+ nfs_lookup_advise_force_readdirplus(dir, flags);
no_entry:
res = d_splice_alias(inode, dentry);
@@ -2157,7 +2163,7 @@ nfs4_do_lookup_revalidate(struct inode *dir, struct dentry *dentry,
reval_dentry:
if (flags & LOOKUP_RCU)
return -ECHILD;
- return nfs_lookup_revalidate_dentry(dir, dentry, inode);
+ return nfs_lookup_revalidate_dentry(dir, dentry, inode, flags);
full_reval:
return nfs_do_lookup_revalidate(dir, dentry, flags);
--
2.35.1