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namei.c: fold the check for DCACHE_OP_REVALIDATE into d_revalidate() 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
hifive-unleashed-5.1
Al Viro 2017-01-09 22:25:28 -05:00
parent 209a7fb210
commit a89f833737
1 changed files with 14 additions and 22 deletions
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36
fs/namei.c
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@ -751,7 +751,10 @@ drop_root_mnt:
static inline int d_revalidate(struct dentry *dentry, unsigned int flags)
{
return dentry->d_op->d_revalidate(dentry, flags);
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE))
return dentry->d_op->d_revalidate(dentry, flags);
else
return 1;
}
/**
@ -1454,19 +1457,14 @@ static struct dentry *lookup_dcache(const struct qstr *name,
struct dentry *dir,
unsigned int flags)
{
struct dentry *dentry;
int error;
dentry = d_lookup(dir, name);
struct dentry *dentry = d_lookup(dir, name);
if (dentry) {
if (dentry->d_flags & DCACHE_OP_REVALIDATE) {
error = d_revalidate(dentry, flags);
if (unlikely(error <= 0)) {
if (!error)
d_invalidate(dentry);
dput(dentry);
return ERR_PTR(error);
}
int error = d_revalidate(dentry, flags);
if (unlikely(error <= 0)) {
if (!error)
d_invalidate(dentry);
dput(dentry);
return ERR_PTR(error);
}
}
return dentry;
@ -1556,8 +1554,7 @@ static int lookup_fast(struct nameidata *nd,
return -ECHILD;
*seqp = seq;
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE))
status = d_revalidate(dentry, nd->flags);
status = d_revalidate(dentry, nd->flags);
if (likely(status > 0)) {
/*
* Note: do negative dentry check after revalidation in
@ -1579,8 +1576,7 @@ static int lookup_fast(struct nameidata *nd,
dentry = __d_lookup(parent, &nd->last);
if (unlikely(!dentry))
return 0;
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE))
status = d_revalidate(dentry, nd->flags);
status = d_revalidate(dentry, nd->flags);
}
if (unlikely(status <= 0)) {
if (!status)
@ -1619,8 +1615,7 @@ again:
if (IS_ERR(dentry))
goto out;
if (unlikely(!d_in_lookup(dentry))) {
if ((dentry->d_flags & DCACHE_OP_REVALIDATE) &&
!(flags & LOOKUP_NO_REVAL)) {
if (!(flags & LOOKUP_NO_REVAL)) {
int error = d_revalidate(dentry, flags);
if (unlikely(error <= 0)) {
if (!error) {
@ -3057,9 +3052,6 @@ static int lookup_open(struct nameidata *nd, struct path *path,
if (d_in_lookup(dentry))
break;
if (!(dentry->d_flags & DCACHE_OP_REVALIDATE))
break;
error = d_revalidate(dentry, nd->flags);
if (likely(error > 0))
break;