[RFC PATCH 08/11] lib: other kernel glue layer code

From: Hajime Tazaki
Date: Tue Mar 24 2015 - 09:22:04 EST

These files are used to provide the same function calls so that other
network stack code keeps untouched.

Signed-off-by: Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
Signed-off-by: Christoph Paasch <christoph.paasch@xxxxxxxxx>
---
arch/lib/cred.c | 16 +++
arch/lib/dcache.c | 93 +++++++++++++++
arch/lib/filemap.c | 27 +++++
arch/lib/fs.c | 287 ++++++++++++++++++++++++++++++++++++++++++++
arch/lib/glue.c | 336 ++++++++++++++++++++++++++++++++++++++++++++++++++++
arch/lib/inode.c | 146 +++++++++++++++++++++++
arch/lib/modules.c | 36 ++++++
arch/lib/pid.c | 29 +++++
arch/lib/print.c | 56 +++++++++
arch/lib/proc.c | 164 +++++++++++++++++++++++++
arch/lib/random.c | 53 +++++++++
arch/lib/security.c | 45 +++++++
arch/lib/seq.c | 122 +++++++++++++++++++
arch/lib/splice.c | 20 ++++
arch/lib/super.c | 210 ++++++++++++++++++++++++++++++++
arch/lib/sysfs.c | 83 +++++++++++++
arch/lib/vmscan.c | 26 ++++
17 files changed, 1749 insertions(+)
create mode 100644 arch/lib/cred.c
create mode 100644 arch/lib/dcache.c
create mode 100644 arch/lib/filemap.c
create mode 100644 arch/lib/fs.c
create mode 100644 arch/lib/glue.c
create mode 100644 arch/lib/inode.c
create mode 100644 arch/lib/modules.c
create mode 100644 arch/lib/pid.c
create mode 100644 arch/lib/print.c
create mode 100644 arch/lib/proc.c
create mode 100644 arch/lib/random.c
create mode 100644 arch/lib/security.c
create mode 100644 arch/lib/seq.c
create mode 100644 arch/lib/splice.c
create mode 100644 arch/lib/super.c
create mode 100644 arch/lib/sysfs.c
create mode 100644 arch/lib/vmscan.c

diff --git a/arch/lib/cred.c b/arch/lib/cred.c
new file mode 100644
index 0000000..50e37cc5
--- /dev/null
+++ b/arch/lib/cred.c
@@ -0,0 +1,16 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include <linux/cred.h>
+void __put_cred(struct cred *cred)
+{
+}
+struct cred *prepare_creds(void)
+{
+ return 0;
+}
diff --git a/arch/lib/dcache.c b/arch/lib/dcache.c
new file mode 100644
index 0000000..a007c20
--- /dev/null
+++ b/arch/lib/dcache.c
@@ -0,0 +1,93 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ * Frederic Urbani
+ */
+
+#include <linux/fs.h>
+#include <linux/dcache.h>
+#include <linux/slab.h>
+#include "sim-assert.h"
+
+static struct kmem_cache *dentry_cache __read_mostly;
+struct kmem_cache *names_cachep __read_mostly;
+
+/**
+ * __d_alloc - allocate a dcache entry
+ * @sb: filesystem it will belong to
+ * @name: qstr of the name
+ *
+ * Allocates a dentry. It returns %NULL if there is insufficient memory
+ * available. On a success the dentry is returned. The name passed in is
+ * copied and the copy passed in may be reused after this call.
+ */
+struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
+{
+ struct dentry *dentry;
+ unsigned char *dname;
+
+ dentry = kmalloc(sizeof(struct dentry), GFP_KERNEL);
+ if (!dentry)
+ return NULL;
+
+ if (name->len > DNAME_INLINE_LEN - 1) {
+ dname = kmalloc(name->len + 1, GFP_KERNEL);
+ if (!dname) {
+ kmem_cache_free(dentry_cache, dentry);
+ return NULL;
+ }
+ } else
+ dname = dentry->d_iname;
+ dentry->d_name.name = dname;
+
+ dentry->d_name.len = name->len;
+ dentry->d_name.hash = name->hash;
+ memcpy(dname, name->name, name->len);
+ dname[name->len] = 0;
+
+ dentry->d_lockref.count = 1;
+ dentry->d_flags = 0;
+ spin_lock_init(&dentry->d_lock);
+ seqcount_init(&dentry->d_seq);
+ dentry->d_inode = NULL;
+ dentry->d_parent = dentry;
+ dentry->d_sb = sb;
+ dentry->d_op = NULL;
+ dentry->d_fsdata = NULL;
+ INIT_HLIST_BL_NODE(&dentry->d_hash);
+ INIT_LIST_HEAD(&dentry->d_lru);
+ INIT_LIST_HEAD(&dentry->d_subdirs);
+ INIT_HLIST_NODE(&dentry->d_u.d_alias);
+ INIT_LIST_HEAD(&dentry->d_child);
+ d_set_d_op(dentry, dentry->d_sb->s_d_op);
+
+/* this_cpu_inc(nr_dentry); */
+
+ return dentry;
+}
+
+void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op)
+{
+ WARN_ON_ONCE(dentry->d_op);
+ WARN_ON_ONCE(dentry->d_flags & (DCACHE_OP_HASH |
+ DCACHE_OP_COMPARE |
+ DCACHE_OP_REVALIDATE |
+ DCACHE_OP_DELETE));
+ dentry->d_op = op;
+ if (!op)
+ return;
+ if (op->d_hash)
+ dentry->d_flags |= DCACHE_OP_HASH;
+ if (op->d_compare)
+ dentry->d_flags |= DCACHE_OP_COMPARE;
+ if (op->d_revalidate)
+ dentry->d_flags |= DCACHE_OP_REVALIDATE;
+ if (op->d_delete)
+ dentry->d_flags |= DCACHE_OP_DELETE;
+ if (op->d_prune)
+ dentry->d_flags |= DCACHE_OP_PRUNE;
+
+}
diff --git a/arch/lib/filemap.c b/arch/lib/filemap.c
new file mode 100644
index 0000000..9a9837c
--- /dev/null
+++ b/arch/lib/filemap.c
@@ -0,0 +1,27 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ * Frederic Urbani
+ */
+
+#include "sim.h"
+#include "sim-assert.h"
+#include <linux/fs.h>
+
+
+ssize_t generic_file_aio_read(struct kiocb *a, const struct iovec *b,
+ unsigned long c, loff_t d)
+{
+ lib_assert(false);
+
+ return 0;
+}
+
+int generic_file_readonly_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ return -ENOSYS;
+}
+
diff --git a/arch/lib/fs.c b/arch/lib/fs.c
new file mode 100644
index 0000000..766a9a8
--- /dev/null
+++ b/arch/lib/fs.c
@@ -0,0 +1,287 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ * Frederic Urbani
+ */
+
+#include <linux/fs.h>
+#include <linux/splice.h>
+#include <linux/mount.h>
+#include <linux/sysctl.h>
+#include <fs/mount.h>
+#include <linux/slab.h>
+#include <linux/backing-dev.h>
+#include <linux/pagemap.h>
+#include <linux/user_namespace.h>
+#include <linux/lglock.h>
+
+#include "sim-assert.h"
+
+__cacheline_aligned_in_smp DEFINE_SEQLOCK(mount_lock);
+struct super_block;
+
+struct user_namespace init_user_ns;
+
+int get_sb_pseudo(struct file_system_type *type, char *str,
+ const struct super_operations *ops, unsigned long z,
+ struct vfsmount *mnt)
+{
+ /* called from sockfs_get_sb by kern_mount_data */
+ mnt->mnt_sb->s_root = 0;
+ mnt->mnt_sb->s_op = ops;
+ return 0;
+}
+struct inode *new_inode(struct super_block *sb)
+{
+ /* call sock_alloc_inode through s_op */
+ struct inode *inode = sb->s_op->alloc_inode(sb);
+
+ inode->i_ino = 0;
+ inode->i_sb = sb;
+ atomic_set(&inode->i_count, 1);
+ inode->i_state = 0;
+ return inode;
+}
+void iput(struct inode *inode)
+{
+ if (atomic_dec_and_test(&inode->i_count))
+ /* call sock_destroy_inode */
+ inode->i_sb->s_op->destroy_inode(inode);
+}
+void inode_init_once(struct inode *inode)
+{
+ memset(inode, 0, sizeof(*inode));
+}
+
+/* Implementation taken from vfs_kern_mount from linux/namespace.c */
+struct vfsmount *kern_mount_data(struct file_system_type *type, void *data)
+{
+ static struct mount local_mnt;
+ struct mount *mnt = &local_mnt;
+ struct dentry *root = 0;
+
+ memset(mnt, 0, sizeof(struct mount));
+ if (!type)
+ return ERR_PTR(-ENODEV);
+ int flags = MS_KERNMOUNT;
+ char *name = (char *)type->name;
+
+ if (flags & MS_KERNMOUNT)
+ mnt->mnt.mnt_flags = MNT_INTERNAL;
+
+ root = type->mount(type, flags, name, data);
+ if (IS_ERR(root))
+ return ERR_CAST(root);
+
+ mnt->mnt.mnt_root = root;
+ mnt->mnt.mnt_sb = root->d_sb;
+ mnt->mnt_mountpoint = mnt->mnt.mnt_root;
+ mnt->mnt_parent = mnt;
+ /* DCE is monothreaded , so we do not care of lock here */
+ list_add_tail(&mnt->mnt_instance, &root->d_sb->s_mounts);
+
+ return &mnt->mnt;
+}
+
+int register_filesystem(struct file_system_type *fs)
+{
+ /* We don't need to register anything because we never
+ really implement. any kind of filesystem.
+ return 0 to signal success. */
+ return 0;
+}
+
+int alloc_fd(unsigned start, unsigned flags)
+{
+ lib_assert(false);
+ return 0;
+}
+void fd_install(unsigned int fd, struct file *file)
+{
+ lib_assert(false);
+}
+void put_unused_fd(unsigned int fd)
+{
+ lib_assert(false);
+}
+
+struct file *alloc_file(struct path *path, fmode_t mode,
+ const struct file_operations *fop)
+{
+ lib_assert(false);
+ return 0;
+}
+
+struct file *fget(unsigned int fd)
+{
+ lib_assert(false);
+ return 0;
+}
+struct file *fget_light(unsigned int fd, int *fput_needed)
+{
+ lib_assert(false);
+ return 0;
+}
+void fput(struct file *file)
+{
+}
+
+struct dentry *d_alloc(struct dentry *entry, const struct qstr *str)
+{
+ lib_assert(false);
+ return 0;
+}
+void d_instantiate(struct dentry *entry, struct inode *inode)
+{
+}
+char *dynamic_dname(struct dentry *dentry, char *buffer, int buflen,
+ const char *fmt, ...)
+{
+ lib_assert(false);
+ return 0;
+}
+
+struct dentry_stat_t dentry_stat;
+struct files_stat_struct files_stat;
+struct inodes_stat_t inodes_stat;
+
+pid_t f_getown(struct file *filp)
+{
+ lib_assert(false);
+ return 0;
+}
+
+void f_setown(struct file *filp, unsigned long arg, int force)
+{
+ lib_assert(false);
+}
+
+void kill_fasync(struct fasync_struct **fs, int a, int b)
+{
+ lib_assert(false);
+}
+int fasync_helper(int a, struct file *file, int b, struct fasync_struct **c)
+{
+ lib_assert(false);
+ return 0;
+}
+long sys_close(unsigned int fd)
+{
+ lib_assert(false);
+ return 0;
+}
+ssize_t splice_to_pipe(struct pipe_inode_info *info,
+ struct splice_pipe_desc *desc)
+{
+ lib_assert(false);
+ return 0;
+}
+int splice_grow_spd(const struct pipe_inode_info *info,
+ struct splice_pipe_desc *desc)
+{
+ lib_assert(false);
+ return 0;
+}
+void splice_shrink_spd(struct splice_pipe_desc *desc)
+{
+ lib_assert(false);
+}
+
+ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe,
+ struct file *out, loff_t *poff, size_t len,
+ unsigned int flags)
+{
+ lib_assert(false);
+ return 0;
+}
+void *generic_pipe_buf_map(struct pipe_inode_info *pipe,
+ struct pipe_buffer *buf, int atomic)
+{
+ lib_assert(false);
+ return 0;
+}
+
+void generic_pipe_buf_unmap(struct pipe_inode_info *pipe,
+ struct pipe_buffer *buf, void *address)
+{
+ lib_assert(false);
+}
+
+int generic_pipe_buf_confirm(struct pipe_inode_info *pipe,
+ struct pipe_buffer *buf)
+{
+ lib_assert(false);
+ return 0;
+}
+
+void generic_pipe_buf_release(struct pipe_inode_info *pipe,
+ struct pipe_buffer *buf)
+{
+ lib_assert(false);
+}
+
+static int generic_pipe_buf_nosteal(struct pipe_inode_info *pipe,
+ struct pipe_buffer *buf)
+{
+ return 1;
+}
+
+void generic_pipe_buf_get(struct pipe_inode_info *pipe, struct pipe_buffer *buf)
+{
+ lib_assert(false);
+}
+int proc_nr_inodes(struct ctl_table *table, int write, void __user *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ lib_assert(false);
+ return 0;
+}
+
+int proc_nr_dentry(struct ctl_table *table, int write, void __user *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ lib_assert(false);
+ return 0;
+}
+
+/*
+ * Handle writeback of dirty data for the device backed by this bdi. Also
+ * wakes up periodically and does kupdated style flushing.
+ */
+int bdi_writeback_thread(void *data)
+{
+ lib_assert(false);
+
+ return 0;
+}
+
+void get_filesystem(struct file_system_type *fs)
+{
+}
+/* #include <fs/proc/proc_sysctl.c> */
+unsigned int nr_free_buffer_pages(void)
+{
+ return 1024;
+}
+
+const struct pipe_buf_operations nosteal_pipe_buf_ops = {
+ .can_merge = 0,
+ .confirm = generic_pipe_buf_confirm,
+ .release = generic_pipe_buf_release,
+ .steal = generic_pipe_buf_nosteal,
+ .get = generic_pipe_buf_get,
+};
+
+ssize_t
+generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
+{
+ return 0;
+}
+
+unsigned long get_max_files(void)
+{
+ return NR_FILE;
+}
diff --git a/arch/lib/glue.c b/arch/lib/glue.c
new file mode 100644
index 0000000..9208739
--- /dev/null
+++ b/arch/lib/glue.c
@@ -0,0 +1,336 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ * Frederic Urbani
+ */
+
+#include <linux/types.h> /* loff_t */
+#include <linux/errno.h> /* ESPIPE */
+#include <linux/pagemap.h> /* PAGE_CACHE_SIZE */
+#include <linux/limits.h> /* NAME_MAX */
+#include <linux/statfs.h> /* struct kstatfs */
+#include <linux/bootmem.h> /* HASHDIST_DEFAULT */
+#include <linux/utsname.h>
+#include <linux/binfmts.h>
+#include <linux/init_task.h>
+#include <linux/sched/rt.h>
+#include <stdarg.h>
+#include "sim-assert.h"
+#include "sim.h"
+#include "lib.h"
+
+
+struct pipe_buffer;
+struct file;
+struct pipe_inode_info;
+struct wait_queue_t;
+struct kernel_param;
+struct super_block;
+struct tvec_base {};
+
+/* defined in fs/exec.c */
+char core_pattern[CORENAME_MAX_SIZE] = "core";
+/* defined in sched.c, used in net/sched/em_meta.c */
+unsigned long avenrun[3];
+/* defined in mm/page_alloc.c, used in net/xfrm/xfrm_hash.c */
+int hashdist = HASHDIST_DEFAULT;
+/* defined in mm/page_alloc.c */
+struct pglist_data __refdata contig_page_data;
+/* defined in linux/mmzone.h mm/memory.c */
+struct page *mem_map = 0;
+/* used during boot. */
+struct tvec_base boot_tvec_bases;
+/* used by sysinfo in kernel/timer.c */
+int nr_threads = 0;
+/* not very useful in mm/vmstat.c */
+atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS];
+
+/* XXX: used in network stack ! */
+unsigned long num_physpages = 0;
+unsigned long totalram_pages = 0;
+
+/* XXX figure out initial value */
+unsigned int interrupt_pending = 0;
+static unsigned long g_irqflags = 0;
+static unsigned long local_irqflags = 0;
+int overflowgid = 0;
+int overflowuid = 0;
+int fs_overflowgid = 0;
+int fs_overflowuid = 0;
+unsigned long sysctl_overcommit_kbytes __read_mostly;
+DEFINE_PER_CPU(struct task_struct *, ksoftirqd);
+
+/* from kobject_uevent.c */
+char uevent_helper[UEVENT_HELPER_PATH_LEN] = "dummy-uevent";
+/* from ksysfs.c */
+int rcu_expedited;
+/* from rt.c */
+int sched_rr_timeslice = RR_TIMESLICE;
+/* from main.c */
+bool initcall_debug;
+bool static_key_initialized __read_mostly = false;
+unsigned long __start_rodata, __end_rodata;
+
+unsigned long __raw_local_save_flags(void)
+{
+ return g_irqflags;
+}
+unsigned long arch_local_save_flags(void)
+{
+ return local_irqflags;
+}
+void arch_local_irq_restore(unsigned long flags)
+{
+ local_irqflags = flags;
+}
+
+int in_egroup_p(kgid_t grp)
+{
+ /* called from sysctl code. */
+ lib_assert(false);
+ return 0;
+}
+
+void __local_bh_enable_ip(unsigned long ip, unsigned int cnt)
+{
+}
+
+unsigned long long nr_context_switches(void)
+{
+ /* we just need to return >0 to avoid the warning
+ in kernel/rcupdate.c */
+ return 1;
+}
+
+
+long get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
+ unsigned long start, unsigned long nr_pages,
+ int write, int force, struct page **pages,
+ struct vm_area_struct **vmas)
+{
+ /* in practice, this function is never called. It's linked in because */
+ /* we link in get_user_pages_fast which is included only because it */
+ /* is located in mm/util.c */
+ lib_assert(false);
+ return 0;
+}
+
+
+unsigned long wrong_size_cmpxchg(volatile void *ptr)
+{
+ lib_assert(false);
+}
+
+void dump_stack(void)
+{
+ /* we assert to make sure that we catch whoever calls dump_stack */
+ lib_assert(false);
+}
+
+
+void lib_printf(const char *str, ...)
+{
+ va_list args;
+
+ va_start(args, str);
+ lib_vprintf(str, args);
+ va_end(args);
+}
+
+void atomic64_inc(atomic64_t *v)
+{
+ v->counter++;
+}
+
+#include <linux/vmalloc.h>
+#include <linux/kmemleak.h>
+
+static unsigned long __meminitdata nr_kernel_pages;
+static unsigned long __meminitdata nr_all_pages;
+/*
+ * allocate a large system hash table from bootmem
+ * - it is assumed that the hash table must contain an exact power-of-2
+ * quantity of entries
+ * - limit is the number of hash buckets, not the total allocation size
+ */
+void *__init alloc_large_system_hash(const char *tablename,
+ unsigned long bucketsize,
+ unsigned long numentries,
+ int scale,
+ int flags,
+ unsigned int *_hash_shift,
+ unsigned int *_hash_mask,
+ unsigned long low_limit,
+ unsigned long high_limit)
+{
+ unsigned long long max = high_limit;
+ unsigned long log2qty, size;
+ void *table = NULL;
+
+ /* allow the kernel cmdline to have a say */
+ if (!numentries) {
+ /* round applicable memory size up to nearest megabyte */
+ numentries = nr_kernel_pages;
+ numentries += (1UL << (20 - PAGE_SHIFT)) - 1;
+ numentries >>= 20 - PAGE_SHIFT;
+ numentries <<= 20 - PAGE_SHIFT;
+
+ /* limit to 1 bucket per 2^scale bytes of low memory */
+ if (scale > PAGE_SHIFT)
+ numentries >>= (scale - PAGE_SHIFT);
+ else
+ numentries <<= (PAGE_SHIFT - scale);
+
+ /* Make sure we've got at least a 0-order allocation.. */
+ if (unlikely(flags & HASH_SMALL)) {
+ /* Makes no sense without HASH_EARLY */
+ WARN_ON(!(flags & HASH_EARLY));
+ if (!(numentries >> *_hash_shift)) {
+ numentries = 1UL << *_hash_shift;
+ BUG_ON(!numentries);
+ }
+ } else if (unlikely((numentries * bucketsize) < PAGE_SIZE))
+ numentries = PAGE_SIZE / bucketsize;
+ }
+ numentries = roundup_pow_of_two(numentries);
+
+ /* limit allocation size to 1/16 total memory by default */
+ if (max == 0) {
+ max = ((unsigned long long)nr_all_pages << PAGE_SHIFT) >> 4;
+ do_div(max, bucketsize);
+ }
+
+ if (numentries > max)
+ numentries = max;
+
+ log2qty = ilog2(numentries);
+
+ do {
+ size = bucketsize << log2qty;
+ if (flags & HASH_EARLY)
+ table = alloc_bootmem_nopanic(size);
+ else if (hashdist)
+ table = __vmalloc(size, GFP_ATOMIC, PAGE_KERNEL);
+ else {
+ /*
+ * If bucketsize is not a power-of-two, we may free
+ * some pages at the end of hash table which
+ * alloc_pages_exact() automatically does
+ */
+ if (get_order(size) < MAX_ORDER) {
+ table = alloc_pages_exact(size, GFP_ATOMIC);
+ kmemleak_alloc(table, size, 1, GFP_ATOMIC);
+ }
+ }
+ } while (!table && size > PAGE_SIZE && --log2qty);
+
+ if (!table)
+ panic("Failed to allocate %s hash table\n", tablename);
+
+ pr_info("%s hash table entries: %d (order: %d, %lu bytes)\n",
+ tablename,
+ (1U << log2qty),
+ ilog2(size) - PAGE_SHIFT,
+ size);
+
+ if (_hash_shift)
+ *_hash_shift = log2qty;
+ if (_hash_mask)
+ *_hash_mask = (1 << log2qty) - 1;
+
+ return table;
+}
+
+int vm_insert_page(struct vm_area_struct *area, unsigned long addr,
+ struct page *page)
+{
+ /* this function is called from af_packet.c to support mmap on packet
+ sockets since we will never call mmap on them, this function
+ should never be called. */
+ lib_assert(false);
+ return 0; /* quiet compiler */
+}
+
+void si_meminfo(struct sysinfo *val)
+{
+ /* This function is called from the ip layer to get information about
+ the amount of memory in the system and make some educated guesses
+ about some default buffer sizes. We pick a value which ensures
+ small buffers. */
+ val->totalram = 0;
+}
+int slab_is_available(void)
+{
+ /* called from kernel/param.c. */
+ return 1;
+}
+
+/* used from kern_ptr_validate from mm/util.c which is never called */
+void *high_memory = 0;
+
+
+
+char *get_options(const char *str, int nints, int *ints)
+{
+ /* called from net/core/dev.c */
+ /* we return 0 to indicate no options. */
+ return 0;
+}
+void __xchg_called_with_bad_pointer(void)
+{
+ /* never called theoretically. */
+ lib_assert(false);
+}
+
+void async_synchronize_full(void)
+{
+ /* called from drivers/base/ *.c */
+ /* there is nothing to do, really. */
+}
+int send_sigurg(struct fown_struct *fown)
+{
+ lib_assert(false);
+ return 0;
+}
+int send_sig(int signal, struct task_struct *task, int x)
+{
+ struct SimTask *lib_task = container_of(task, struct SimTask,
+ kernel_task);
+
+ lib_signal_raised((struct SimTask *)lib_task, signal);
+ /* lib_assert (false); */
+ return 0;
+}
+unsigned long get_taint(void)
+{
+ /* never tainted. */
+ return 0;
+}
+void add_taint(unsigned flag, enum lockdep_ok lockdep_ok)
+{
+}
+struct pid *cad_pid = 0;
+
+void add_device_randomness(const void *buf, unsigned int size)
+{
+}
+
+int kobject_uevent(struct kobject *kobj, enum kobject_action action)
+{
+ return 0;
+}
+
+int sched_rr_handler(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos)
+{
+ return 0;
+}
+
+void on_each_cpu_mask(const struct cpumask *mask,
+ smp_call_func_t func, void *info, bool wait)
+{
+}
diff --git a/arch/lib/inode.c b/arch/lib/inode.c
new file mode 100644
index 0000000..ab3d2ec
--- /dev/null
+++ b/arch/lib/inode.c
@@ -0,0 +1,146 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ * Frederic Urbani
+ */
+
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/dcache.h>
+#include <linux/security.h>
+#include <linux/pagemap.h>
+#include <linux/backing-dev.h>
+
+
+static struct kmem_cache *inode_cachep __read_mostly;
+/*
+ * Empty aops. Can be used for the cases where the user does not
+ * define any of the address_space operations.
+ */
+const struct address_space_operations empty_aops = {
+};
+
+unsigned int get_next_ino(void)
+{
+ static unsigned int res = 0;
+
+ return ++res;
+}
+
+/**
+ * inode_init_always - perform inode structure intialisation
+ * @sb: superblock inode belongs to
+ * @inode: inode to initialise
+ *
+ * These are initializations that need to be done on every inode
+ * allocation as the fields are not initialised by slab allocation.
+ */
+int inode_init_always(struct super_block *sb, struct inode *inode)
+{
+ static const struct inode_operations empty_iops;
+ static const struct file_operations empty_fops;
+ struct address_space *const mapping = &inode->i_data;
+
+ inode->i_sb = sb;
+ inode->i_blkbits = sb->s_blocksize_bits;
+ inode->i_flags = 0;
+ atomic_set(&inode->i_count, 1);
+ inode->i_op = &empty_iops;
+ inode->__i_nlink = 1;
+ inode->i_opflags = 0;
+ i_uid_write(inode, 0);
+ i_gid_write(inode, 0);
+ atomic_set(&inode->i_writecount, 0);
+ inode->i_size = 0;
+ inode->i_blocks = 0;
+ inode->i_bytes = 0;
+ inode->i_generation = 0;
+ inode->i_pipe = NULL;
+ inode->i_bdev = NULL;
+ inode->i_cdev = NULL;
+ inode->i_rdev = 0;
+ inode->dirtied_when = 0;
+
+ if (security_inode_alloc(inode))
+ goto out;
+ spin_lock_init(&inode->i_lock);
+ lockdep_set_class(&inode->i_lock, &sb->s_type->i_lock_key);
+
+ mutex_init(&inode->i_mutex);
+ lockdep_set_class(&inode->i_mutex, &sb->s_type->i_mutex_key);
+
+ atomic_set(&inode->i_dio_count, 0);
+
+ mapping->a_ops = &empty_aops;
+ mapping->host = inode;
+ mapping->flags = 0;
+ atomic_set(&mapping->i_mmap_writable, 0);
+ mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
+ mapping->private_data = NULL;
+ mapping->writeback_index = 0;
+ inode->i_private = NULL;
+ inode->i_mapping = mapping;
+ INIT_HLIST_HEAD(&inode->i_dentry); /* buggered by rcu freeing */
+#ifdef CONFIG_FS_POSIX_ACL
+ inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
+#endif
+
+#ifdef CONFIG_FSNOTIFY
+ inode->i_fsnotify_mask = 0;
+#endif
+ /* this_cpu_inc(nr_inodes); */
+
+ return 0;
+out:
+ return -ENOMEM;
+}
+
+
+static struct inode *alloc_inode(struct super_block *sb)
+{
+ struct inode *inode;
+
+ if (sb->s_op->alloc_inode)
+ inode = sb->s_op->alloc_inode(sb);
+ else
+ inode = kmem_cache_alloc(inode_cachep, GFP_KERNEL);
+
+ if (!inode)
+ return NULL;
+
+ if (unlikely(inode_init_always(sb, inode))) {
+ if (inode->i_sb->s_op->destroy_inode)
+ inode->i_sb->s_op->destroy_inode(inode);
+ else
+ kmem_cache_free(inode_cachep, inode);
+ return NULL;
+ }
+
+ return inode;
+}
+
+/**
+ * new_inode_pseudo - obtain an inode
+ * @sb: superblock
+ *
+ * Allocates a new inode for given superblock.
+ * Inode wont be chained in superblock s_inodes list
+ * This means :
+ * - fs can't be unmount
+ * - quotas, fsnotify, writeback can't work
+ */
+struct inode *new_inode_pseudo(struct super_block *sb)
+{
+ struct inode *inode = alloc_inode(sb);
+
+ if (inode) {
+ spin_lock(&inode->i_lock);
+ inode->i_state = 0;
+ spin_unlock(&inode->i_lock);
+ INIT_LIST_HEAD(&inode->i_sb_list);
+ }
+ return inode;
+}
diff --git a/arch/lib/modules.c b/arch/lib/modules.c
new file mode 100644
index 0000000..ca43fdc
--- /dev/null
+++ b/arch/lib/modules.c
@@ -0,0 +1,36 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ * Frederic Urbani
+ */
+
+#include "sim-assert.h"
+#include <linux/moduleparam.h>
+#include <linux/kmod.h>
+#include <linux/module.h>
+
+int modules_disabled = 0;
+char modprobe_path[KMOD_PATH_LEN] = "/sbin/modprobe";
+
+static struct module_version_attribute g_empty_attr_buffer;
+/* we make the array empty by default because, really, we don't need */
+/* to look at the builtin params */
+const struct kernel_param __start___param[] = {{0}} ;
+const struct kernel_param __stop___param[] = {{0}} ;
+const struct module_version_attribute *__start___modver[] = {
+ &g_empty_attr_buffer};
+const struct module_version_attribute *__stop___modver[] = {
+ &g_empty_attr_buffer};
+
+struct module_attribute module_uevent;
+struct ctl_table usermodehelper_table[] = {};
+
+int __request_module(bool wait, const char *fmt, ...)
+{
+ /* we really should never be trying to load modules that way. */
+ /* lib_assert (false); */
+ return 0;
+}
diff --git a/arch/lib/pid.c b/arch/lib/pid.c
new file mode 100644
index 0000000..00cf7b6
--- /dev/null
+++ b/arch/lib/pid.c
@@ -0,0 +1,29 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include <linux/pid.h>
+#include "sim.h"
+#include "sim-assert.h"
+
+void put_pid(struct pid *pid)
+{
+}
+pid_t pid_vnr(struct pid *pid)
+{
+ return pid_nr(pid);
+}
+struct task_struct *find_task_by_vpid(pid_t nr)
+{
+ lib_assert(false);
+ return 0;
+}
+struct pid *find_get_pid(int nr)
+{
+ lib_assert(false);
+ return 0;
+}
diff --git a/arch/lib/print.c b/arch/lib/print.c
new file mode 100644
index 0000000..09b1bb5
--- /dev/null
+++ b/arch/lib/print.c
@@ -0,0 +1,56 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include <stdarg.h>
+#include <linux/string.h>
+#include <linux/printk.h>
+#include "sim.h"
+#include "sim-assert.h"
+
+int dmesg_restrict = 1;
+
+/* from lib/vsprintf.c */
+int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
+
+int printk(const char *fmt, ...)
+{
+ va_list args;
+ static char buf[256];
+ int value;
+
+ va_start(args, fmt);
+ value = vsnprintf(buf, 256, printk_skip_level(fmt), args);
+ lib_printf("<%c>%s", printk_get_level(fmt), buf);
+ va_end(args);
+ return value;
+}
+void panic(const char *fmt, ...)
+{
+ va_list args;
+
+ va_start(args, fmt);
+ lib_vprintf(fmt, args);
+ va_end(args);
+ lib_assert(false);
+}
+
+void warn_slowpath_fmt(const char *file, int line, const char *fmt, ...)
+{
+ va_list args;
+
+ printk("%s:%d -- ", file, line);
+ va_start(args, fmt);
+ lib_vprintf(fmt, args);
+ va_end(args);
+}
+
+void warn_slowpath_null(const char *file, int line)
+{
+ printk("%s:%d -- ", file, line);
+}
+
diff --git a/arch/lib/proc.c b/arch/lib/proc.c
new file mode 100644
index 0000000..0a65d7b
--- /dev/null
+++ b/arch/lib/proc.c
@@ -0,0 +1,164 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2014 Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include <linux/fs.h>
+#include <linux/net.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/string.h>
+#include <net/net_namespace.h>
+#include "sim-types.h"
+#include "sim-assert.h"
+#include "fs/proc/internal.h" /* XXX */
+
+struct proc_dir_entry;
+static char proc_root_data[sizeof(struct proc_dir_entry) + 4];
+
+static struct proc_dir_entry *proc_root_sim =
+ (struct proc_dir_entry *)proc_root_data;
+
+void lib_proc_net_initialize(void)
+{
+ proc_root_sim->parent = proc_root_sim;
+ strcpy(proc_root_sim->name, "net");
+ proc_root_sim->mode = S_IFDIR | S_IRUGO | S_IXUGO;
+ proc_root_sim->subdir = RB_ROOT;
+ init_net.proc_net = proc_root_sim;
+ init_net.proc_net_stat = proc_mkdir("stat", proc_root_sim);
+}
+struct proc_dir_entry *
+proc_net_fops_create(struct net *net,
+ const char *name,
+ umode_t mode, const struct file_operations *fops)
+{
+ return proc_create_data(name, mode, net->proc_net, fops, 0);
+}
+
+static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent,
+ const char *name,
+ umode_t mode,
+ nlink_t nlink)
+{
+ struct proc_dir_entry *ent = NULL;
+ const char *fn = name;
+ struct qstr qstr;
+
+ qstr.name = fn;
+ qstr.len = strlen(fn);
+ if (qstr.len == 0 || qstr.len >= 256) {
+ WARN(1, "name len %u\n", qstr.len);
+ return NULL;
+ }
+
+ ent = kzalloc(sizeof(struct proc_dir_entry) + qstr.len + 1, GFP_KERNEL);
+ if (!ent)
+ goto out;
+
+ memcpy(ent->name, fn, qstr.len + 1);
+ ent->namelen = qstr.len;
+ ent->mode = mode;
+ ent->nlink = nlink;
+ ent->subdir = RB_ROOT;
+ atomic_set(&ent->count, 1);
+ spin_lock_init(&ent->pde_unload_lock);
+ INIT_LIST_HEAD(&ent->pde_openers);
+out:
+ return ent;
+}
+struct proc_dir_entry *proc_create_data(const char *name, umode_t mode,
+ struct proc_dir_entry *parent,
+ const struct file_operations *proc_fops,
+ void *data)
+{
+ struct proc_dir_entry *de;
+
+ de = __proc_create(&parent, name, S_IFDIR | mode, 2);
+ de->proc_fops = proc_fops;
+ de->data = data;
+ return de;
+}
+static int proc_match(unsigned int len, const char *name,
+ struct proc_dir_entry *de)
+{
+ if (len < de->namelen)
+ return -1;
+ if (len > de->namelen)
+ return 1;
+
+ return memcmp(name, de->name, len);
+}
+static struct proc_dir_entry *pde_subdir_find(struct proc_dir_entry *dir,
+ const char *name,
+ unsigned int len)
+{
+ struct rb_node *node = dir->subdir.rb_node;
+
+ while (node) {
+ struct proc_dir_entry *de = container_of(node,
+ struct proc_dir_entry,
+ subdir_node);
+ int result = proc_match(len, name, de);
+
+ if (result < 0)
+ node = node->rb_left;
+ else if (result > 0)
+ node = node->rb_right;
+ else
+ return de;
+ }
+ return NULL;
+}
+
+void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
+{
+ struct proc_dir_entry *de, **prev;
+
+ de = pde_subdir_find(parent, name, strlen(name));
+ if (de) {
+ rb_erase(&de->subdir_node, &parent->subdir);
+ kfree(de->name);
+ kfree(de);
+ }
+}
+void proc_net_remove(struct net *net, const char *name)
+{
+ remove_proc_entry(name, net->proc_net);
+}
+void proc_remove(struct proc_dir_entry *de)
+{
+ /* XXX */
+}
+int proc_nr_files(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+struct proc_dir_entry *proc_mkdir(const char *name,
+ struct proc_dir_entry *parent)
+{
+ return __proc_create(&parent, name, S_IFDIR | S_IRUGO, 2);
+}
+
+struct proc_dir_entry *proc_mkdir_data(const char *name, umode_t mode,
+ struct proc_dir_entry *parent,
+ void *data)
+{
+ struct proc_dir_entry *de;
+
+ de = __proc_create(&parent, name,
+ S_IFDIR | S_IRUGO | S_IXUGO | mode, 2);
+ de->data = data;
+ return de;
+}
+
+int proc_alloc_inum(unsigned int *inum)
+{
+ *inum = 1;
+ return 0;
+}
diff --git a/arch/lib/random.c b/arch/lib/random.c
new file mode 100644
index 0000000..9fbb8bf
--- /dev/null
+++ b/arch/lib/random.c
@@ -0,0 +1,53 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include "sim.h"
+#include <linux/random.h>
+
+u32 random32(void)
+{
+ return lib_random();
+}
+
+void get_random_bytes(void *buf, int nbytes)
+{
+ char *p = (char *)buf;
+ int i;
+
+ for (i = 0; i < nbytes; i++)
+ p[i] = lib_random();
+}
+void srandom32(u32 entropy)
+{
+}
+
+u32 prandom_u32(void)
+{
+ return lib_random();
+}
+void prandom_seed(u32 entropy)
+{
+}
+
+void prandom_bytes(void *buf, size_t bytes)
+{
+ return get_random_bytes(buf, bytes);
+}
+
+#include <linux/sysctl.h>
+
+static int nothing;
+struct ctl_table random_table[] = {
+ {
+ .procname = "nothing",
+ .data = &nothing,
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ }
+};
diff --git a/arch/lib/security.c b/arch/lib/security.c
new file mode 100644
index 0000000..0367189
--- /dev/null
+++ b/arch/lib/security.c
@@ -0,0 +1,45 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include "linux/capability.h"
+
+struct sock;
+struct sk_buff;
+
+bool capable(int cap)
+{
+ switch (cap) {
+ case CAP_NET_RAW:
+ case CAP_NET_BIND_SERVICE:
+ case CAP_NET_ADMIN:
+ return 1;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+int cap_netlink_recv(struct sk_buff *skb, int cap)
+{
+ return 0;
+}
+
+int cap_netlink_send(struct sock *sk, struct sk_buff *skb)
+{
+ return 0;
+}
+bool ns_capable(struct user_namespace *ns, int cap)
+{
+ return true;
+}
+bool file_ns_capable(const struct file *file, struct user_namespace *ns,
+ int cap)
+{
+ return true;
+}
diff --git a/arch/lib/seq.c b/arch/lib/seq.c
new file mode 100644
index 0000000..72c2f5d
--- /dev/null
+++ b/arch/lib/seq.c
@@ -0,0 +1,122 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include <linux/seq_file.h>
+
+struct hlist_node *seq_hlist_next_rcu(void *v,
+ struct hlist_head *head,
+ loff_t *ppos)
+{
+ return 0;
+}
+struct hlist_node *seq_hlist_start_head_rcu(struct hlist_head *head,
+ loff_t pos)
+{
+ return 0;
+}
+struct list_head *seq_list_start(struct list_head *head,
+ loff_t pos)
+{
+ return 0;
+}
+struct list_head *seq_list_start_head(struct list_head *head,
+ loff_t pos)
+{
+ return 0;
+}
+
+struct list_head *seq_list_next(void *v, struct list_head *head,
+ loff_t *ppos)
+{
+ return 0;
+}
+
+void *__seq_open_private(struct file *file, const struct seq_operations *ops,
+ int psize)
+{
+ return 0;
+}
+
+int seq_open_private(struct file *file, const struct seq_operations *ops,
+ int psize)
+{
+ return 0;
+}
+
+int seq_release_private(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+loff_t seq_lseek(struct file *file, loff_t offset, int origin)
+{
+ return 0;
+}
+int seq_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+int seq_putc(struct seq_file *m, char c)
+{
+ return 0;
+}
+int seq_puts(struct seq_file *m, const char *s)
+{
+ return 0;
+}
+ssize_t seq_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
+{
+ return 0;
+}
+int seq_open(struct file *file, const struct seq_operations *ops)
+{
+ return 0;
+}
+int seq_printf(struct seq_file *seq, const char *fmt, ...)
+{
+ return 0;
+}
+
+int seq_write(struct seq_file *seq, const void *data, size_t len)
+{
+ return 0;
+}
+
+int seq_open_net(struct inode *inode, struct file *file,
+ const struct seq_operations *ops, int size)
+{
+ return 0;
+}
+
+int seq_release_net(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+
+int single_open(struct file *file, int (*cb)(struct seq_file *,
+ void *), void *data)
+{
+ return 0;
+}
+
+int single_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+int single_open_net(struct inode *inode, struct file *file,
+ int (*show)(struct seq_file *, void *))
+{
+ return 0;
+}
+
+int single_release_net(struct inode *inode, struct file *file)
+{
+ return 0;
+}
diff --git a/arch/lib/splice.c b/arch/lib/splice.c
new file mode 100644
index 0000000..9ecd9e5
--- /dev/null
+++ b/arch/lib/splice.c
@@ -0,0 +1,20 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include "sim.h"
+#include "sim-assert.h"
+#include <linux/fs.h>
+
+ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags)
+{
+ lib_assert(false);
+
+ return 0;
+}
diff --git a/arch/lib/super.c b/arch/lib/super.c
new file mode 100644
index 0000000..45a653f
--- /dev/null
+++ b/arch/lib/super.c
@@ -0,0 +1,210 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/acct.h>
+#include <linux/blkdev.h>
+#include <linux/mount.h>
+#include <linux/security.h>
+#include <linux/writeback.h> /* for the emergency remount stuff */
+#include <linux/idr.h>
+#include <linux/mutex.h>
+#include <linux/backing-dev.h>
+#include <linux/rculist_bl.h>
+#include <linux/cleancache.h>
+#include <linux/fsnotify.h>
+#include <linux/fs.h>
+#include <sim-assert.h>
+
+
+void put_super(struct super_block *sb)
+{
+}
+
+int grab_super(struct super_block *s)
+{
+ return 0;
+}
+void destroy_super(struct super_block *s)
+{
+}
+
+int set_anon_super(struct super_block *s, void *data)
+{
+ return 0;
+}
+
+struct super_block;
+LIST_HEAD(super_blocks);
+
+/**
+ * alloc_super - create new superblock
+ * @type: filesystem type superblock should belong to
+ *
+ * Allocates and initializes a new &struct super_block. alloc_super()
+ * returns a pointer new superblock or %NULL if allocation had failed.
+ */
+static struct super_block *alloc_super(struct file_system_type *type)
+{
+ struct super_block *s = kzalloc(sizeof(struct super_block), GFP_USER);
+ static const struct super_operations default_op;
+
+ if (s) {
+ if (security_sb_alloc(s)) {
+ kfree(s);
+ s = NULL;
+ goto fail;
+ }
+ INIT_HLIST_NODE(&s->s_instances);
+ INIT_HLIST_BL_HEAD(&s->s_anon);
+ INIT_LIST_HEAD(&s->s_inodes);
+ if (list_lru_init(&s->s_dentry_lru))
+ goto fail;
+ if (list_lru_init(&s->s_inode_lru))
+ goto fail;
+ INIT_LIST_HEAD(&s->s_mounts);
+ init_rwsem(&s->s_umount);
+ /*
+ * sget() can have s_umount recursion.
+ *
+ * When it cannot find a suitable sb, it allocates a new
+ * one (this one), and tries again to find a suitable old
+ * one.
+ *
+ * In case that succeeds, it will acquire the s_umount
+ * lock of the old one. Since these are clearly distrinct
+ * locks, and this object isn't exposed yet, there's no
+ * risk of deadlocks.
+ *
+ * Annotate this by putting this lock in a different
+ * subclass.
+ */
+ down_write_nested(&s->s_umount, SINGLE_DEPTH_NESTING);
+ s->s_count = 1;
+ atomic_set(&s->s_active, 1);
+ mutex_init(&s->s_vfs_rename_mutex);
+ lockdep_set_class(&s->s_vfs_rename_mutex,
+ &type->s_vfs_rename_key);
+ mutex_init(&s->s_dquot.dqio_mutex);
+ mutex_init(&s->s_dquot.dqonoff_mutex);
+ s->s_maxbytes = MAX_NON_LFS;
+ s->s_op = &default_op;
+ s->s_time_gran = 1000000000;
+ s->cleancache_poolid = -1;
+
+ s->s_shrink.seeks = DEFAULT_SEEKS;
+ s->s_shrink.batch = 1024;
+ return s;
+ }
+fail:
+ destroy_super(s);
+ return NULL;
+}
+
+/**
+ * deactivate_locked_super - drop an active reference to superblock
+ * @s: superblock to deactivate
+ *
+ * Drops an active reference to superblock, converting it into a temprory
+ * one if there is no other active references left. In that case we
+ * tell fs driver to shut it down and drop the temporary reference we
+ * had just acquired.
+ *
+ * Caller holds exclusive lock on superblock; that lock is released.
+ */
+void deactivate_locked_super(struct super_block *s)
+{
+ struct file_system_type *fs = s->s_type;
+
+ if (atomic_dec_and_test(&s->s_active)) {
+ cleancache_invalidate_fs(s);
+ fs->kill_sb(s);
+
+ /* caches are now gone, we can safely kill the shrinker now */
+ unregister_shrinker(&s->s_shrink);
+
+ /*
+ * We need to call rcu_barrier so all the delayed rcu free
+ * inodes are flushed before we release the fs module.
+ */
+ rcu_barrier();
+ put_filesystem(fs);
+ put_super(s);
+ } else
+ up_write(&s->s_umount);
+}
+
+/* from fs/super.c */
+DEFINE_SPINLOCK(sb_lock);
+/**
+ * sget - find or create a superblock
+ * @type: filesystem type superblock should belong to
+ * @test: comparison callback
+ * @set: setup callback
+ * @data: argument to each of them
+ */
+struct super_block *sget(struct file_system_type *type,
+ int (*test)(struct super_block *, void *),
+ int (*set)(struct super_block *, void *),
+ int flags, void *data)
+{
+ struct super_block *s = NULL;
+ struct super_block *old;
+ int err;
+
+retry:
+ spin_lock(&sb_lock);
+ if (test) {
+ hlist_for_each_entry(old, &type->fs_supers, s_instances) {
+ if (!test(old, data))
+ continue;
+ if (!grab_super(old))
+ goto retry;
+ if (s) {
+ up_write(&s->s_umount);
+ destroy_super(s);
+ s = NULL;
+ }
+ down_write(&old->s_umount);
+ if (unlikely(!(old->s_flags & MS_BORN))) {
+ deactivate_locked_super(old);
+ goto retry;
+ }
+ return old;
+ }
+ }
+ if (!s) {
+ spin_unlock(&sb_lock);
+ s = alloc_super(type);
+ if (!s)
+ return ERR_PTR(-ENOMEM);
+ goto retry;
+ }
+
+ err = set(s, data);
+ if (err) {
+ spin_unlock(&sb_lock);
+ up_write(&s->s_umount);
+ destroy_super(s);
+ return ERR_PTR(err);
+ }
+ s->s_type = type;
+ strlcpy(s->s_id, type->name, sizeof(s->s_id));
+ list_add_tail(&s->s_list, &super_blocks);
+ hlist_add_head(&s->s_instances, &type->fs_supers);
+ spin_unlock(&sb_lock);
+/* get_filesystem(type); */
+/* register_shrinker(&s->s_shrink); */
+ return s;
+}
+
+void kill_anon_super(struct super_block *sb)
+{
+
+}
diff --git a/arch/lib/sysfs.c b/arch/lib/sysfs.c
new file mode 100644
index 0000000..2def2ca
--- /dev/null
+++ b/arch/lib/sysfs.c
@@ -0,0 +1,83 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include <linux/sysfs.h>
+#include <linux/kobject.h>
+#include "sim.h"
+#include "sim-assert.h"
+
+int sysfs_create_bin_file(struct kobject *kobj,
+ const struct bin_attribute *attr)
+{
+ return 0;
+}
+void sysfs_remove_bin_file(struct kobject *kobj,
+ const struct bin_attribute *attr)
+{
+}
+int sysfs_create_dir(struct kobject *kobj)
+{
+ return 0;
+}
+int sysfs_create_link(struct kobject *kobj, struct kobject *target,
+ const char *name)
+{
+ return 0;
+}
+int sysfs_move_dir(struct kobject *kobj,
+ struct kobject *new_parent_kobj)
+{
+ return 0;
+}
+void sysfs_remove_dir(struct kobject *kobj)
+{
+}
+void sysfs_remove_group(struct kobject *kobj,
+ const struct attribute_group *grp)
+{
+}
+int sysfs_rename_dir(struct kobject *kobj, const char *new_name)
+{
+ return 0;
+}
+int __must_check sysfs_create_group(struct kobject *kobj,
+ const struct attribute_group *grp)
+{
+ return 0;
+}
+int sysfs_create_groups(struct kobject *kobj,
+ const struct attribute_group **groups)
+{
+ return 0;
+}
+int sysfs_schedule_callback(struct kobject *kobj,
+ void (*func)(
+ void *), void *data, struct module *owner)
+{
+ return 0;
+}
+void sysfs_delete_link(struct kobject *dir, struct kobject *targ,
+ const char *name)
+{
+}
+void sysfs_exit_ns(enum kobj_ns_type type, const void *tag)
+{
+}
+void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr)
+{
+}
+int sysfs_create_dir_ns(struct kobject *kobj, const void *ns)
+{
+ kobj->sd = lib_malloc(sizeof(struct kernfs_node));
+ return 0;
+}
+int sysfs_create_file_ns(struct kobject *kobj, const struct attribute *attr,
+ const void *ns)
+{
+ return 0;
+}
diff --git a/arch/lib/vmscan.c b/arch/lib/vmscan.c
new file mode 100644
index 0000000..3132f66
--- /dev/null
+++ b/arch/lib/vmscan.c
@@ -0,0 +1,26 @@
+/*
+ * glue code for library version of Linux kernel
+ * Copyright (c) 2015 INRIA, Hajime Tazaki
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@xxxxxxxxx>
+ * Hajime Tazaki <tazaki@xxxxxxxxxxxxxx>
+ */
+
+#include <linux/mm.h>
+#include <linux/shrinker.h>
+
+/*
+ * Add a shrinker callback to be called from the vm
+ */
+int register_shrinker(struct shrinker *shrinker)
+{
+ return 0;
+}
+
+/*
+ * Remove one
+ */
+void unregister_shrinker(struct shrinker *shrinker)
+{
+}
+
--
2.1.0

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