static int au_rdu_do(struct file *h_file, struct au_rdu_arg *arg)
{
int err;
loff_t offset;
struct au_rdu_cookie *cookie = &arg->rdu->cookie;
offset = vfsub_llseek(h_file, cookie->h_pos, SEEK_SET);
err = offset;
if (unlikely(offset != cookie->h_pos))
goto out;
err = 0;
do {
arg->err = 0;
au_fclr_rdu(cookie->flags, CALLED);
/* smp_mb(); */
err = vfsub_readdir(h_file, au_rdu_fill, arg);
if (err >= 0)
err = arg->err;
} while (!err
&& au_ftest_rdu(cookie->flags, CALLED)
&& !au_ftest_rdu(cookie->flags, FULL));
cookie->h_pos = h_file->f_pos;
out:
AuTraceErr(err);
return err;
}
static struct dentry *au_lkup_by_ino(struct path *path, ino_t ino,
struct au_nfsd_si_lock *nsi_lock)
{
struct dentry *dentry, *parent;
struct file *file;
struct inode *dir;
struct find_name_by_ino arg;
int err;
parent = path->dentry;
if (nsi_lock)
si_read_unlock(parent->d_sb);
file = vfsub_dentry_open(path, au_dir_roflags);
dentry = (void *)file;
if (IS_ERR(file))
goto out;
dentry = ERR_PTR(-ENOMEM);
arg.name = __getname_gfp(GFP_NOFS);
if (unlikely(!arg.name))
goto out_file;
arg.ino = ino;
arg.found = 0;
do {
arg.called = 0;
/* smp_mb(); */
err = vfsub_readdir(file, find_name_by_ino, &arg);
} while (!err && !arg.found && arg.called);
dentry = ERR_PTR(err);
if (unlikely(err))
goto out_name;
dentry = ERR_PTR(-ENOENT);
if (!arg.found)
goto out_name;
/* do not call au_lkup_one() */
dir = parent->d_inode;
mutex_lock(&dir->i_mutex);
dentry = vfsub_lookup_one_len(arg.name, parent, arg.namelen);
mutex_unlock(&dir->i_mutex);
AuTraceErrPtr(dentry);
if (IS_ERR(dentry))
goto out_name;
AuDebugOn(au_test_anon(dentry));
if (unlikely(!dentry->d_inode)) {
dput(dentry);
dentry = ERR_PTR(-ENOENT);
}
out_name:
__putname(arg.name);
out_file:
fput(file);
out:
if (unlikely(nsi_lock
&& si_nfsd_read_lock(parent->d_sb, nsi_lock) < 0))
if (!IS_ERR(dentry)) {
dput(dentry);
dentry = ERR_PTR(-ESTALE);
}
AuTraceErrPtr(dentry);
return dentry;
}
static struct dentry *au_lkup_by_ino(struct path *path, ino_t ino,
struct au_nfsd_si_lock *nsi_lock)
{
struct dentry *dentry, *parent;
struct file *file;
struct inode *dir;
struct find_name_by_ino arg;
int err;
parent = path->dentry;
LKTRTrace("%.*s, i%lu\n", AuDLNPair(parent), (unsigned long)ino);
if (nsi_lock)
si_read_unlock(parent->d_sb);
path_get(path);
file = dentry_open(parent, path->mnt, au_dir_roflags);
dentry = (void *)file;
if (IS_ERR(file))
goto out;
dentry = ERR_PTR(-ENOMEM);
arg.name = __getname();
if (unlikely(!arg.name))
goto out_file;
arg.ino = ino;
arg.found = 0;
do {
arg.called = 0;
/* smp_mb(); */
err = vfsub_readdir(file, find_name_by_ino, &arg, /*dlgt*/0);
} while (!err && !arg.found && arg.called);
dentry = ERR_PTR(err);
if (unlikely(err))
goto out_name;
dentry = ERR_PTR(-ENOENT);
if (!arg.found)
goto out_name;
/* do not call au_lkup_one(), nor dlgt */
dir = parent->d_inode;
vfsub_i_lock(dir);
dentry = vfsub_lookup_one_len(arg.name, parent, arg.namelen);
vfsub_i_unlock(dir);
AuTraceErrPtr(dentry);
if (IS_ERR(dentry))
goto out_name;
AuDebugOn(au_test_anon(dentry));
if (unlikely(!dentry->d_inode)) {
dput(dentry);
dentry = ERR_PTR(-ENOENT);
}
out_name:
__putname(arg.name);
out_file:
fput(file);
out:
if (unlikely(nsi_lock
&& si_nfsd_read_lock(parent->d_sb, nsi_lock) < 0))
if (!IS_ERR(dentry)) {
dput(dentry);
dentry = ERR_PTR(-ESTALE);
}
AuTraceErrPtr(dentry);
return dentry;
}
