int main(int argc, char** argv)
{
printf("KEY META TESTS\n");
printf("==================\n\n");
init (argc, argv);
test_basic();
test_iterate();
test_size();
test_uid();
test_dup();
test_comment();
test_owner();
test_mode();
test_type();
test_examples();
test_copy();
test_ro();
test_new();
test_copyall();
printf("\ntest_ks RESULTS: %d test(s) done. %d error(s).\n", nbTest, nbError);
return nbError;
}
/* common functions to regular file and dir */
struct file *hidden_open(struct dentry *dentry, aufs_bindex_t bindex, int flags)
{
struct dentry *hidden_dentry;
struct inode *hidden_inode;
struct super_block *sb;
struct vfsmount *hidden_mnt;
struct file *hidden_file;
struct aufs_branch *br;
loff_t old_size;
int udba;
LKTRTrace("%.*s, b%d, flags 0%o\n", DLNPair(dentry), bindex, flags);
DEBUG_ON(!dentry);
hidden_dentry = au_h_dptr_i(dentry, bindex);
DEBUG_ON(!hidden_dentry);
hidden_inode = hidden_dentry->d_inode;
DEBUG_ON(!hidden_inode);
sb = dentry->d_sb;
udba = au_flag_test(sb, AuFlag_UDBA_INOTIFY);
if (unlikely(udba)) {
// test here?
}
br = stobr(sb, bindex);
br_get(br);
/* drop flags for writing */
if (test_ro(sb, bindex, dentry->d_inode))
flags = au_file_roflags(flags);
flags &= ~O_CREAT;
spin_lock(&hidden_inode->i_lock);
old_size = i_size_read(hidden_inode);
spin_unlock(&hidden_inode->i_lock);
//DbgSleep(3);
dget(hidden_dentry);
hidden_mnt = mntget(br->br_mnt);
hidden_file = dentry_open(hidden_dentry, hidden_mnt, flags);
//if (LktrCond) {fput(hidden_file); hidden_file = ERR_PTR(-1);}
if (!IS_ERR(hidden_file)) {
#if 0 // remove this
if (/* old_size && */ (flags & O_TRUNC)) {
au_direval_dec(dentry);
if (!IS_ROOT(dentry))
au_direval_dec(dentry->d_parent);
}
#endif
return hidden_file;
}
br_put(br);
TraceErrPtr(hidden_file);
return hidden_file;
}
/* returns,
* 0: wh is unnecessary
* plus: wh is necessary
* minus: error
*/
int wr_dir_need_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup,
struct dentry *locked)
{
int need_wh, err;
aufs_bindex_t bstart;
struct dentry *hidden_dentry;
struct super_block *sb;
LKTRTrace("%.*s, isdir %d, *bcpup %d, locked %p\n",
DLNPair(dentry), isdir, *bcpup, locked);
sb = dentry->d_sb;
bstart = dbstart(dentry);
LKTRTrace("bcpup %d, bstart %d\n", *bcpup, bstart);
hidden_dentry = au_h_dptr(dentry);
if (*bcpup < 0) {
*bcpup = bstart;
if (test_ro(sb, bstart, dentry->d_inode)) {
*bcpup = err = find_rw_parent_br(dentry, bstart);
//*bcpup = err = find_rw_br(sb, bstart);
//err = -1;
if (unlikely(err < 0))
goto out;
}
} else
DEBUG_ON(bstart < *bcpup
|| test_ro(sb, *bcpup, dentry->d_inode));
LKTRTrace("bcpup %d, bstart %d\n", *bcpup, bstart);
if (*bcpup != bstart) {
err = cpup_dirs(dentry, *bcpup, locked);
//err = -1;
if (unlikely(err))
goto out;
need_wh = 1;
} else {
//struct nameidata nd;
aufs_bindex_t old_bend, new_bend, bdiropq = -1;
old_bend = dbend(dentry);
if (isdir) {
bdiropq = dbdiropq(dentry);
set_dbdiropq(dentry, -1);
}
err = need_wh = lkup_dentry(dentry, bstart + 1, /*type*/0);
//err = -1;
if (isdir)
set_dbdiropq(dentry, bdiropq);
if (unlikely(err < 0))
goto out;
new_bend = dbend(dentry);
if (!need_wh && old_bend != new_bend) {
set_h_dptr(dentry, new_bend, NULL);
set_dbend(dentry, old_bend);
#if 0
} else if (!au_h_dptr_i(dentry, new_bend)->d_inode) {
LKTRTrace("negative\n");
set_h_dptr(dentry, new_bend, NULL);
set_dbend(dentry, old_bend);
need_wh = 0;
#endif
}
}
LKTRTrace("need_wh %d\n", need_wh);
err = need_wh;
out:
TraceErr(err);
return err;
}
/*
* prepare the @file for writing.
*/
int au_ready_to_write(struct file *file, loff_t len)
{
int err;
struct dentry *dentry, *parent, *hidden_dentry, *hidden_parent;
struct inode *hidden_inode, *hidden_dir, *inode, *dir;
struct super_block *sb;
aufs_bindex_t bstart, bcpup;
dentry = file->f_dentry;
LKTRTrace("%.*s, len %Ld\n", DLNPair(dentry), len);
FiMustWriteLock(file);
sb = dentry->d_sb;
bstart = fbstart(file);
DEBUG_ON(ftobr(file, bstart) != stobr(sb, bstart));
inode = dentry->d_inode;
ii_read_lock_child(inode);
LKTRTrace("rdonly %d, bstart %d\n", test_ro(sb, bstart, inode), bstart);
err = test_ro(sb, bstart, inode);
ii_read_unlock(inode);
if (!err && (au_h_fptr(file)->f_mode & FMODE_WRITE))
return 0;
/* need to cpup */
parent = dentry->d_parent; // dget_parent()
di_write_lock_child(dentry);
di_write_lock_parent(parent);
bcpup = err = find_rw_parent_br(dentry, bstart);
//bcpup = err = find_rw_br(sb, bstart);
if (unlikely(err < 0))
goto out_unlock;
err = 0;
hidden_parent = au_h_dptr_i(parent, bcpup);
if (!hidden_parent) {
err = cpup_dirs(dentry, bcpup, NULL);
//if (LktrCond) err = -1;
if (unlikely(err))
goto out_unlock;
hidden_parent = au_h_dptr_i(parent, bcpup);
}
hidden_dir = hidden_parent->d_inode;
hidden_dentry = au_h_fptr(file)->f_dentry;
hidden_inode = hidden_dentry->d_inode;
dir = parent->d_inode;
hdir_lock(hidden_dir, dir, bcpup);
hi_lock_child(hidden_inode);
if (d_unhashed(dentry) || d_unhashed(hidden_dentry)
/* || !hidden_inode->i_nlink */) {
if (!au_test_perm(hidden_dir, MAY_EXEC | MAY_WRITE,
need_dlgt(sb)))
err = cpup_wh_file(file, bcpup, len);
else {
struct cpup_wh_file_args args = {
.errp = &err,
.file = file,
.bdst = bcpup,
.len = len
};
au_wkq_wait(call_cpup_wh_file, &args, /*dlgt*/0);
}
//if (LktrCond) err = -1;
TraceErr(err);
} else {
if (!au_h_dptr_i(dentry, bcpup))
int au_do_open(struct inode *inode, struct file *file,
int (*open)(struct file *file, int flags))
{
int err, coo;
struct dentry *dentry;
struct super_block *sb;
aufs_bindex_t bstart;
struct inode *h_dir, *dir;
dentry = file->f_dentry;
LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(dentry));
sb = dentry->d_sb;
si_read_lock(sb);
coo = 0;
#if 0
switch (au_flag_test_coo(sb)) {
case AuFlag_COO_LEAF:
coo = !S_ISDIR(inode->i_mode);
break;
case AuFlag_COO_ALL:
coo = 1;
break;
}
#endif
err = au_init_finfo(file);
//if (LktrCond) {fi_write_unlock(file); fin_finfo(file); err = -1;}
if (unlikely(err))
goto out;
if (!coo) {
di_read_lock_child(dentry, AUFS_I_RLOCK);
bstart = dbstart(dentry);
} else {
di_write_lock_child(dentry);
bstart = dbstart(dentry);
if (test_ro(sb, bstart, dentry->d_inode)) {
err = do_coo(dentry, bstart);
if (err) {
di_write_unlock(dentry);
goto out_finfo;
}
bstart = dbstart(dentry);
}
di_downgrade_lock(dentry, AUFS_I_RLOCK);
}
// todo: remove this extra locks
dir = dentry->d_parent->d_inode;
if (!IS_ROOT(dentry))
ii_read_lock_parent(dir);
h_dir = au_h_iptr_i(dir, bstart);
hdir_lock(h_dir, dir, bstart);
err = open(file, file->f_flags);
//if (LktrCond) err = -1;
hdir_unlock(h_dir, dir, bstart);
if (!IS_ROOT(dentry))
ii_read_unlock(dir);
di_read_unlock(dentry, AUFS_I_RLOCK);
out_finfo:
fi_write_unlock(file);
if (unlikely(err))
au_fin_finfo(file);
//DbgFile(file);
out:
si_read_unlock(sb);
TraceErr(err);
return err;
}
