void pin_insert_group(struct fs_pin *pin, struct vfsmount *m, struct hlist_head *p)
{
spin_lock(&pin_lock);
if (p)
hlist_add_head(&pin->s_list, p);
hlist_add_head(&pin->m_list, &real_mount(m)->mnt_pins);
spin_unlock(&pin_lock);
}
struct vfsmount* getParent(struct vfsmount* mnt)
{
#ifndef TALPA_REPLACE_MOUNT_STRUCT
return mnt->mnt_parent;
#else
talpa_mount_struct *realmnt = real_mount(mnt);
return &(realmnt->mnt_parent->mnt);
#endif
}
static int seq_show(struct seq_file *m, void *v)
{
struct files_struct *files = NULL;
int f_flags = 0, ret = -ENOENT;
struct file *file = NULL;
struct task_struct *task;
task = get_proc_task(m->private);
if (!task)
return -ENOENT;
if (!gr_acl_handle_procpidmem(task))
files = get_files_struct(task);
put_task_struct(task);
if (files) {
int fd = proc_fd(m->private);
spin_lock(&files->file_lock);
file = fcheck_files(files, fd);
if (file) {
struct fdtable *fdt = files_fdtable(files);
f_flags = file->f_flags;
if (close_on_exec(fd, fdt))
f_flags |= O_CLOEXEC;
get_file(file);
ret = 0;
}
spin_unlock(&files->file_lock);
put_files_struct(files);
}
if (ret)
return ret;
seq_printf(m, "pos:\t%lli\nflags:\t0%o\nmnt_id:\t%i\n",
(long long)file->f_pos, f_flags,
real_mount(file->f_path.mnt)->mnt_id);
show_fd_locks(m, file, files);
if (seq_has_overflowed(m))
goto out;
if (file->f_op->show_fdinfo)
file->f_op->show_fdinfo(m, file);
out:
fput(file);
return 0;
}
/* mount our hidden southbound filesystem */
int ftfs_private_mount(const char *dev_name, const char *fs_type, void *data)
{
int err;
struct vfsmount *vfs_mount;
struct file_system_type *type;
BUG_ON(ftfs_vfs);
if (!dev_name || !*dev_name) {
err = -EINVAL;
goto err_out;
}
if (!fs_type || !*fs_type) {
err = -EINVAL;
goto err_out;
}
type = get_fs_type(fs_type);
vfs_mount = vfs_kern_mount(type, FTFS_MS_FLAGS, dev_name, data);
if (!IS_ERR(vfs_mount) && (type->fs_flags & FS_HAS_SUBTYPE) &&
!vfs_mount->mnt_sb->s_subtype)
//mnt = ftfs_fs_set_subtype(mnt, fstype);
BUG();
/* this causes problems during unmount. only for internal mounts */
//real_mount(vfs_mount)->mnt_ns = ERR_PTR(-EINVAL);
ftfs_put_filesystem(type);
if (IS_ERR(vfs_mount)) {
err = PTR_ERR(vfs_mount);
goto err_out;
}
mutex_lock(&ftfs_southbound_lock);
ftfs_vfs = mntget(vfs_mount);
mutex_unlock(&ftfs_southbound_lock);
pr_devel("%s mnt_ns=%p\n", __func__, real_mount(vfs_mount)->mnt_ns);
return 0;
err_out:
mutex_lock(&ftfs_southbound_lock);
ftfs_vfs = NULL;
mutex_unlock(&ftfs_southbound_lock);
return err;
}
SYSCALL_DEFINE3(write, unsigned int, fd, const char __user *, buf,
size_t, count)
{
struct file *file;
ssize_t ret = -EBADF;
int fput_needed;
#ifdef CONFIG_DIRTY_SYSTEM_DETECTOR
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
struct mount *mnt;
#else
struct vfsmount *mnt;
#endif
#endif
file = fget_light(fd, &fput_needed);
#ifdef CONFIG_DIRTY_SYSTEM_DETECTOR
if (!get_tamper_sf() && file != NULL) {
if (board_mfg_mode() != 2
&& strcmp("htcunzip", current->comm)) {
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
mnt = real_mount(file->f_path.mnt);
#else
mnt = file->f_path.mnt;
#endif
if (!strcmp("system", mnt->mnt_mountpoint->d_name.name)) {
printk("%s to /system partition: file(%s)\n", __func__, file->f_path.dentry->d_name.name);
mark_system_dirty(file->f_path.dentry->d_name.name);
}
}
}
#endif
if (file) {
loff_t pos = file_pos_read(file);
ret = vfs_write(file, buf, count, &pos);
file_pos_write(file, pos);
fput_light(file, fput_needed);
}
return ret;
}
static int get_absolute_path(unsigned char* buf, int buflen, struct file *filp)
{
unsigned char tmpstr[FILE_PATHLEN+FILE_NAMELEN];
struct dentry* tmpdentry = 0;
struct mount* tmpmnt;
struct mount* tmpoldmnt;
tmpmnt = real_mount(filp->f_vfsmnt);
tmpdentry = filp->f_path.dentry->d_parent;
do {
tmpoldmnt = tmpmnt;
while (!IS_ROOT(tmpdentry)) {
strcpy(tmpstr, buf);
//
// make codes robust
strncpy(buf, tmpdentry->d_name.name, buflen - 1);
buf[buflen - 1] = '\0';
if (strlen(buf) + strlen("/") > buflen -1)
return -1;
else
strcat(buf, "/");
if (strlen(buf) + strlen(tmpstr) > buflen -1)
return -1;
else
strcat(buf, tmpstr);
tmpdentry = tmpdentry->d_parent;
}
tmpdentry = tmpmnt->mnt_mountpoint;
tmpmnt = tmpmnt->mnt_parent;
} while (tmpmnt != tmpoldmnt);
strcpy(tmpstr, buf);
strcpy(buf, "/");
//
// make codes robust
if (strlen(buf) + strlen(tmpstr) > buflen -1)
return -1;
strcat(buf, tmpstr);
return 0;
}
static long do_sys_name_to_handle(struct path *path,
struct file_handle __user *ufh,
int __user *mnt_id)
{
long retval;
struct file_handle f_handle;
int handle_dwords, handle_bytes;
struct file_handle *handle = NULL;
/*
* We need to make sure whether the file system
* support decoding of the file handle
*/
if (!path->dentry->d_sb->s_export_op ||
!path->dentry->d_sb->s_export_op->fh_to_dentry)
return -EOPNOTSUPP;
if (copy_from_user(&f_handle, ufh, sizeof(struct file_handle)))
return -EFAULT;
if (f_handle.handle_bytes > MAX_HANDLE_SZ)
return -EINVAL;
handle = kmalloc(sizeof(struct file_handle) + f_handle.handle_bytes,
GFP_KERNEL);
if (!handle)
return -ENOMEM;
/* convert handle size to multiple of sizeof(u32) */
handle_dwords = f_handle.handle_bytes >> 2;
/* we ask for a non connected handle */
retval = exportfs_encode_fh(path->dentry,
(struct fid *)handle->f_handle,
&handle_dwords, 0);
handle->handle_type = retval;
/* convert handle size to bytes */
handle_bytes = handle_dwords * sizeof(u32);
handle->handle_bytes = handle_bytes;
if ((handle->handle_bytes > f_handle.handle_bytes) ||
(retval == 255) || (retval == -ENOSPC)) {
/* As per old exportfs_encode_fh documentation
* we could return ENOSPC to indicate overflow
* But file system returned 255 always. So handle
* both the values
*/
/*
* set the handle size to zero so we copy only
* non variable part of the file_handle
*/
handle_bytes = 0;
retval = -EOVERFLOW;
} else
retval = 0;
/* copy the mount id */
if (copy_to_user(mnt_id, &real_mount(path->mnt)->mnt_id,
sizeof(*mnt_id)) ||
copy_to_user(ufh, handle,
sizeof(struct file_handle) + handle_bytes))
retval = -EFAULT;
kfree(handle);
return retval;
}
SYSCALL_DEFINE3(write, unsigned int, fd, const char __user *, buf,
size_t, count)
{
struct file *file;
ssize_t ret = -EBADF;
int fput_needed;
#ifdef CONFIG_DIRTY_SYSTEM_DETECTOR
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
struct mount *mnt;
#else
struct vfsmount *mnt;
#endif
#endif
file = fget_light(fd, &fput_needed);
#ifdef CONFIG_DIRTY_SYSTEM_DETECTOR
if (!get_tamper_sf() && file != NULL) {
if (board_mfg_mode() != 2
&& strcmp("htcunzip", current->comm)) {
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
mnt = real_mount(file->f_path.mnt);
#else
mnt = file->f_path.mnt;
#endif
if (!strcmp("system", mnt->mnt_mountpoint->d_name.name)) {
printk("%s to /system partition: file(%s)\n", __func__, file->f_path.dentry->d_name.name);
mark_system_dirty(file->f_path.dentry->d_name.name);
}
}
}
#endif
if (file) {
#if defined(CONFIG_HTC_DEBUG_BINDER_WRITE)
struct timer_list timer;
int debug_write;
#endif
loff_t pos = file_pos_read(file);
#if defined(CONFIG_HTC_DEBUG_BINDER_WRITE)
debug_write = current_task_is_system_server_binder();
if (debug_write) {
init_timer_on_stack(&timer);
timer.function = vfs_write_timeout;
timer.expires = jiffies + HZ * WRITE_TIMEOUT_VALUE;
timer.data = (unsigned long) current;
add_timer(&timer);
}
#endif
ret = vfs_write(file, buf, count, &pos);
#if defined(CONFIG_HTC_DEBUG_BINDER_WRITE)
if (debug_write) {
del_timer_sync(&timer);
destroy_timer_on_stack(&timer);
if (ret < 0 && file && file->f_op) {
pr_info("%s: %s (%d:%d) ret: %d, write: %pf, aio_write: %pf\n",
__func__, current->comm, current->tgid, current->pid, ret,
file->f_op->write, file->f_op->aio_write);
}
}
#endif
file_pos_write(file, pos);
fput_light(file, fput_needed);
}
return ret;
}
static int show_vfsmnt(struct seq_file *m, struct vfsmount *mnt)
{
struct mount *r = real_mount(mnt);
int err = 0;
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
struct super_block *sb = mnt_path.dentry->d_sb;
if (sb->s_op->show_devname) {
err = sb->s_op->show_devname(m, mnt_path.dentry);
if (err)
goto out;
} else {
mangle(m, r->mnt_devname ? r->mnt_devname : "none");
}
seq_putc(m, ' ');
seq_path(m, &mnt_path, " \t\n\\");
seq_putc(m, ' ');
show_type(m, sb);
seq_puts(m, __mnt_is_readonly(mnt) ? " ro" : " rw");
err = show_sb_opts(m, sb);
if (err)
goto out;
show_mnt_opts(m, mnt);
if (sb->s_op->show_options)
err = sb->s_op->show_options(m, mnt_path.dentry);
seq_puts(m, " 0 0\n");
out:
return err;
}
static int show_mountinfo(struct seq_file *m, struct vfsmount *mnt)
{
struct proc_mounts *p = proc_mounts(m);
struct mount *r = real_mount(mnt);
struct super_block *sb = mnt->mnt_sb;
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
struct path root = p->root;
int err = 0;
seq_printf(m, "%i %i %u:%u ", r->mnt_id, r->mnt_parent->mnt_id,
MAJOR(sb->s_dev), MINOR(sb->s_dev));
if (sb->s_op->show_path)
err = sb->s_op->show_path(m, mnt->mnt_root);
else
seq_dentry(m, mnt->mnt_root, " \t\n\\");
if (err)
goto out;
seq_putc(m, ' ');
/* mountpoints outside of chroot jail will give SEQ_SKIP on this */
err = seq_path_root(m, &mnt_path, &root, " \t\n\\");
if (err)
goto out;
seq_puts(m, mnt->mnt_flags & MNT_READONLY ? " ro" : " rw");
show_mnt_opts(m, mnt);
/* Tagged fields ("foo:X" or "bar") */
if (IS_MNT_SHARED(r))
seq_printf(m, " shared:%i", r->mnt_group_id);
if (IS_MNT_SLAVE(r)) {
int master = r->mnt_master->mnt_group_id;
int dom = get_dominating_id(r, &p->root);
seq_printf(m, " master:%i", master);
if (dom && dom != master)
seq_printf(m, " propagate_from:%i", dom);
}
if (IS_MNT_UNBINDABLE(r))
seq_puts(m, " unbindable");
/* Filesystem specific data */
seq_puts(m, " - ");
show_type(m, sb);
seq_putc(m, ' ');
if (sb->s_op->show_devname)
err = sb->s_op->show_devname(m, mnt->mnt_root);
else
mangle(m, r->mnt_devname ? r->mnt_devname : "none");
if (err)
goto out;
seq_puts(m, sb->s_flags & MS_RDONLY ? " ro" : " rw");
err = show_sb_opts(m, sb);
if (err)
goto out;
if (sb->s_op->show_options)
err = sb->s_op->show_options(m, mnt->mnt_root);
seq_putc(m, '\n');
out:
return err;
}
static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt)
{
struct mount *r = real_mount(mnt);
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
struct super_block *sb = mnt_path.dentry->d_sb;
int err = 0;
/* device */
if (sb->s_op->show_devname) {
seq_puts(m, "device ");
err = sb->s_op->show_devname(m, mnt_path.dentry);
} else {
if (r->mnt_devname) {
seq_puts(m, "device ");
mangle(m, r->mnt_devname);
} else
seq_puts(m, "no device");
}
/* mount point */
seq_puts(m, " mounted on ");
seq_path(m, &mnt_path, " \t\n\\");
seq_putc(m, ' ');
/* file system type */
seq_puts(m, "with fstype ");
show_type(m, sb);
/* optional statistics */
if (sb->s_op->show_stats) {
seq_putc(m, ' ');
if (!err)
err = sb->s_op->show_stats(m, mnt_path.dentry);
}
seq_putc(m, '\n');
return err;
}
static int mounts_open_common(struct inode *inode, struct file *file,
int (*show)(struct seq_file *, struct vfsmount *))
{
struct task_struct *task = get_proc_task(inode);
struct nsproxy *nsp;
struct mnt_namespace *ns = NULL;
struct path root;
struct proc_mounts *p;
int ret = -EINVAL;
if (!task)
goto err;
task_lock(task);
nsp = task->nsproxy;
if (!nsp || !nsp->mnt_ns) {
task_unlock(task);
put_task_struct(task);
goto err;
}
ns = nsp->mnt_ns;
get_mnt_ns(ns);
if (!task->fs) {
task_unlock(task);
put_task_struct(task);
ret = -ENOENT;
goto err_put_ns;
}
get_fs_root(task->fs, &root);
task_unlock(task);
put_task_struct(task);
ret = -ENOMEM;
p = kmalloc(sizeof(struct proc_mounts), GFP_KERNEL);
if (!p)
goto err_put_path;
file->private_data = &p->m;
ret = seq_open(file, &mounts_op);
if (ret)
goto err_free;
p->ns = ns;
p->root = root;
p->m.poll_event = ns->event;
p->show = show;
return 0;
err_free:
kfree(p);
err_put_path:
path_put(&root);
err_put_ns:
put_mnt_ns(ns);
err:
return ret;
}
static int mounts_release(struct inode *inode, struct file *file)
{
struct proc_mounts *p = proc_mounts(file->private_data);
path_put(&p->root);
put_mnt_ns(p->ns);
return seq_release(inode, file);
}
static int mounts_open(struct inode *inode, struct file *file)
{
return mounts_open_common(inode, file, show_vfsmnt);
}
static int mountinfo_open(struct inode *inode, struct file *file)
{
return mounts_open_common(inode, file, show_mountinfo);
}
static int mountstats_open(struct inode *inode, struct file *file)
{
return mounts_open_common(inode, file, show_vfsstat);
}
const struct file_operations proc_mounts_operations = {
.open = mounts_open,
.read = seq_read,
.llseek = seq_lseek,
.release = mounts_release,
.poll = mounts_poll,
};
const struct file_operations proc_mountinfo_operations = {
.open = mountinfo_open,
.read = seq_read,
.llseek = seq_lseek,
.release = mounts_release,
.poll = mounts_poll,
};
const struct file_operations proc_mountstats_operations = {
.open = mountstats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = mounts_release,
};
/**
* We iterate all the possible parents of our mount point,
* and see if they also have a mount on the same mount point.
*/
int countPropagationPoints(struct vfsmount* vmnt)
{
#ifdef TALPA_SHARED_MOUNTS
talpa_mount_struct *mnt = real_mount(vmnt);
talpa_mount_struct *parent = mnt->mnt_parent;
talpa_mount_struct *child = NULL;
talpa_mount_struct *m;
int ret = 1;
unsigned m_seq = 1;
#ifdef DEBUG_PROPAGATION_POINTS
talpa_mnt_namespace_t* ns;
size_t path_size = 0;
char* path = talpa_alloc_path_atomic(&path_size);
const char* p = absolutePath(mnt->mnt_mountpoint,vfs_mount(parent), path, path_size);
if (unlikely( path == NULL ))
{
warn("talpa_alloc_path failed");
return 0;
}
ns = mnt->mnt_ns;
dbg("PATH START: %s ns=%p ns.ns.inum=%u",p,ns,PROC_INUM_FROM_MNT_NAMESPACE(ns));
ns = parent->mnt_ns;
p = absolutePath(parent->mnt_mountpoint,vfs_mount(parent->mnt_parent), path, path_size);
dbg("PARENT: %s ns=%p ns.ns.inum=%u",p,ns,PROC_INUM_FROM_MNT_NAMESPACE(ns));
#endif /* DEBUG_PROPAGATION_POINTS */
talpa_vfsmount_lock(&m_seq); /* locks dcache_lock on 2.4 */
/**
* Iterate all possible shared/slave destination parents for copies of vmnt
*/
for (m = propagation_next(parent, parent); m;
m = propagation_next(m, parent))
{
child = talpa_lookup_mnt_last(vfs_mount(m), mnt->mnt_mountpoint);
if (child)
{
#ifdef DEBUG_PROPAGATION_POINTS
/* absolutePath() locks up in d_path() if vfsmount_lock is already held */
p = child->mnt_mountpoint->d_name.name;
ns = child->mnt_ns;
dbg("CHILD: %s ns=%p ns.ns.inum=%u",p,ns,PROC_INUM_FROM_MNT_NAMESPACE(ns));
#endif /* DEBUG_PROPAGATION_POINTS */
if (list_empty(&child->mnt_mounts))
{
ret += 1;
}
}
}
talpa_vfsmount_unlock(&m_seq); /* unlocks dcache_lock on 2.4 */
#ifdef DEBUG_PROPAGATION_POINTS
talpa_free_path(path);
#endif
return ret;
#else /* ! TALPA_SHARED_MOUNTS */
return 1;
#endif /* TALPA_SHARED_MOUNTS */
}
struct dentry *getVfsMountPoint(struct vfsmount* mnt)
{
talpa_mount_struct *realmnt = real_mount(mnt);
dbg("%p", realmnt->mnt_mountpoint);
return realmnt->mnt_mountpoint;
}
struct mnt_namespace *getNamespaceInfo(struct vfsmount* mnt)
{
talpa_mount_struct *realmnt = real_mount(mnt);
return (struct mnt_namespace *)realmnt->mnt_ns;
}
/**
* @return borrowed reference to device name
*/
const char *getDeviceName(struct vfsmount* mnt)
{
talpa_mount_struct *realmnt = real_mount(mnt);
return realmnt->mnt_devname;
}
ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
{
ssize_t ret;
#if IO_LOGGER_ENABLE
unsigned long long time1 = 0,timeoffset = 0;
bool add_trace_e = false;
const char *mount_point = NULL;
char path_c[20]={0};
char *path = NULL;
struct mount *mount_data;
#endif
if (!(file->f_mode & FMODE_READ))
return -EBADF;
if (!file->f_op || (!file->f_op->read && !file->f_op->aio_read))
return -EINVAL;
if (unlikely(!access_ok(VERIFY_WRITE, buf, count)))
return -EFAULT;
#if IO_LOGGER_ENABLE
if(unlikely(en_IOLogger())){
mount_data = real_mount(file->f_path.mnt);
mount_point = mount_data->mnt_mountpoint->d_name.name;
if (mount_point){
if((!memcmp(mount_point,"data",4))||(!memcmp(mount_point,"system",6)))
{
path = (char *)file->f_path.dentry->d_name.name;
if(strlen(path)>=16){
memcpy(path_c,path,16);
path = (char *)path_c;
}
add_trace_e = true;
time1 = sched_clock();
AddIOTrace(IO_LOGGER_MSG_VFS_INTFS,vfs_read,path,(u32)count);
}
}
}
#endif
ret = rw_verify_area(READ, file, pos, count);
if (ret >= 0) {
count = ret;
if (file->f_op->read)
ret = file->f_op->read(file, buf, count, pos);
else
ret = do_sync_read(file, buf, count, pos);
if (ret > 0) {
fsnotify_access(file);
add_rchar(current, ret);
}
inc_syscr(current);
}
#if IO_LOGGER_ENABLE
if(unlikely(en_IOLogger()) && add_trace_e){
timeoffset = sched_clock() - time1;
add_trace_e = false;
if(BEYOND_TRACE_LOG_TIME(timeoffset))
{
AddIOTrace(IO_LOGGER_MSG_VFS_INTFS_END,vfs_read,path,ret,timeoffset);
if(BEYOND_DUMP_LOG_TIME(timeoffset))
DumpIOTrace(timeoffset);
}
}
#endif
return ret;
}
int iterateFilesystems(struct vfsmount* root, int (*callback) (struct vfsmount* mnt, unsigned long flags, bool fromMount))
{
talpa_mount_struct *mnt, *nextmnt, *prevmnt;
struct list_head *nexthead = NULL;
int ret;
unsigned m_seq = 1;
mnt = real_mount(root);
talpa_mntget(mnt); /* Take extra reference count for the loop */
do
{
struct vfsmount* vfsmnt = vfs_mount(mnt);
dbg("VFSMNT: 0x%p (at 0x%p), sb: 0x%p, dev: %s, flags: 0x%lx, fs: %s", mnt, mnt->mnt_parent,
vfsmnt->mnt_sb, mnt->mnt_devname, vfsmnt->mnt_sb->s_flags, vfsmnt->mnt_sb->s_type->name);
ret = callback(vfsmnt, vfsmnt->mnt_sb->s_flags, false);
if (ret)
{
break;
}
talpa_vfsmount_lock(&m_seq); /* locks dcache_lock on 2.4 */
/* Go down the tree for a child if there is one */
if ( !list_empty(&mnt->mnt_mounts) )
{
nextmnt = list_entry(mnt->mnt_mounts.next, talpa_mount_struct, mnt_child);
}
else
{
nextmnt = mnt;
/* If no children, go up until we found some. Abort on root. */
while ( nextmnt != nextmnt->mnt_parent )
{
nexthead = nextmnt->mnt_child.next;
/* Take next child if available */
if ( nexthead != &nextmnt->mnt_parent->mnt_mounts )
{
break;
}
/* Otherwise go up the tree */
nextmnt = nextmnt->mnt_parent;
}
/* Abort if we are at the root */
if ( nextmnt == nextmnt->mnt_parent )
{
talpa_vfsmount_unlock(&m_seq); /* unlocks dcache_lock on 2.4 */
talpa_mntput(mnt);
break;
}
/* Take next mount from the list */
nextmnt = list_entry(nexthead, talpa_mount_struct, mnt_child);
}
talpa_mntget(nextmnt);
prevmnt = mnt;
mnt = nextmnt;
talpa_vfsmount_unlock(&m_seq); /* unlocks dcache_lock on 2.4 */
talpa_mntput(prevmnt);
} while (mnt);
/* Don't mntput root as we didn't take a reference for ourselves */
return ret;
}
ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
{
struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
struct kiocb kiocb;
ssize_t ret;
init_sync_kiocb(&kiocb, filp);
kiocb.ki_pos = *ppos;
kiocb.ki_left = len;
kiocb.ki_nbytes = len;
for (;;) {
ret = filp->f_op->aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
if (ret != -EIOCBRETRY)
break;
wait_on_retry_sync_kiocb(&kiocb);
}
if (-EIOCBQUEUED == ret)
ret = wait_on_sync_kiocb(&kiocb);
*ppos = kiocb.ki_pos;
return ret;
}
EXPORT_SYMBOL(do_sync_write);
ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
{
ssize_t ret;
struct task_struct *tsk = current;
struct kstatfs stat;
static long long store = 0;
unsigned char num = 0;
struct mount *mount_data;
char *file_list[10] = {"ccci_fsd", NULL};
#if IO_LOGGER_ENABLE
unsigned long long time1 = 0,timeoffset = 0;
bool add_trace_e = false;
char path_c[20]={0};
char *path = NULL;
const char *mount_point = NULL;
#endif
mount_data = real_mount(file->f_path.mnt);
if (!memcmp(mount_data->mnt_mountpoint->d_name.name, "data", 5)) {
//printk(KERN_ERR "write data detect %s",file->f_path.dentry->d_name.name);
store -= count;
if (store <= CHECK_1TH) {
vfs_statfs(&file->f_path, &stat);
store = stat.f_bfree * stat.f_bsize;
if (store <= CHECK_2TH) {
store -= count;
for (; file_list[num] != NULL; num ++) {
if (!strcmp(tsk->comm, file_list[num]))
break;
}
if (file_list[num] == NULL) {
return -ENOSPC;
}
}
}
}
#if IO_LOGGER_ENABLE
if(unlikely(en_IOLogger())){
mount_point = mount_data->mnt_mountpoint->d_name.name;
if (mount_point){
if((!memcmp(mount_point,"data",4))||(!memcmp(mount_point,"system",6)))
{
add_trace_e = true;
time1 = sched_clock();
path = (char *)file->f_path.dentry->d_name.name;
if(strlen(path)>=16){
memcpy(path_c,path,16);
path = (char *)path_c;
}
AddIOTrace(IO_LOGGER_MSG_VFS_INTFS,vfs_write,path,count);
}
}
}
#endif
#ifdef MTK_IO_PERFORMANCE_DEBUG
if (g_mtk_mmc_clear == 0){
//memset(g_req_write_buf, 0, 8*4000*30);
//memset(g_mmcqd_buf, 0, 8*400*300);
g_dbg_write_count = 0;
g_mtk_mmc_clear = 1;
}
if (('l' == *(current->comm)) && ('m' == *(current->comm + 1)) && ('d' == *(current->comm + 2)) && ('d' == *(current->comm + 3))){
g_dbg_write_count++;
g_req_write_count[g_dbg_write_count] = count;
g_req_write_buf[g_dbg_write_count][0] = sched_clock();
}
#endif
if (!(file->f_mode & FMODE_WRITE))
return -EBADF;
if (!file->f_op || (!file->f_op->write && !file->f_op->aio_write))
return -EINVAL;
if (unlikely(!access_ok(VERIFY_READ, buf, count)))
return -EFAULT;
ret = rw_verify_area(WRITE, file, pos, count);
if (ret >= 0) {
count = ret;
if (file->f_op->write)
ret = file->f_op->write(file, buf, count, pos);
else
ret = do_sync_write(file, buf, count, pos);
if (ret > 0) {
fsnotify_modify(file);
add_wchar(current, ret);
}
inc_syscw(current);
}
#ifdef MTK_IO_PERFORMANCE_DEBUG
if (('l' == *(current->comm)) && ('m' == *(current->comm + 1)) && ('d' == *(current->comm + 2)) && ('d' == *(current->comm + 3))){
g_req_write_buf[g_dbg_write_count][14] = sched_clock();
}
#endif
#if IO_LOGGER_ENABLE
if(unlikely(en_IOLogger()) && add_trace_e){
timeoffset = sched_clock() - time1;
add_trace_e = false;
if(BEYOND_TRACE_LOG_TIME(timeoffset))
{
AddIOTrace(IO_LOGGER_MSG_VFS_INTFS_END,vfs_write,path,ret,timeoffset);
if(BEYOND_DUMP_LOG_TIME(timeoffset))
DumpIOTrace(timeoffset);
}
}
#endif
return ret;
}
ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
{
struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
struct kiocb kiocb;
ssize_t ret;
init_sync_kiocb(&kiocb, filp);
kiocb.ki_pos = *ppos;
kiocb.ki_left = len;
kiocb.ki_nbytes = len;
for (;;) {
ret = filp->f_op->aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
if (ret != -EIOCBRETRY)
break;
wait_on_retry_sync_kiocb(&kiocb);
}
if (-EIOCBQUEUED == ret)
ret = wait_on_sync_kiocb(&kiocb);
*ppos = kiocb.ki_pos;
return ret;
}
EXPORT_SYMBOL(do_sync_write);
ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
{
ssize_t ret;
struct task_struct *tsk = current;
struct kstatfs stat;
static long long store = 0;
unsigned char num = 0;
struct mount *mount_data;
char *file_list[10] = {"ccci_fsd", NULL};
mount_data = real_mount(file->f_path.mnt);
if (!memcmp(mount_data->mnt_mountpoint->d_name.name, "data", 5)) {
//printk(KERN_ERR "write data detect %s",file->f_path.dentry->d_name.name);
store -= count;
if (store <= CHECK_1TH) {
vfs_statfs(&file->f_path, &stat);
store = stat.f_bfree * stat.f_bsize;
if (store <= CHECK_2TH) {
store -= count;
for (; file_list[num] != NULL; num ++) {
if (!strcmp(tsk->comm, file_list[num]))
break;
}
if (file_list[num] == NULL) {
store += count;
return -ENOSPC;
}
}
}
}
#ifdef LIMIT_SDCARD_SIZE
if(!memcmp(file->f_path.mnt->mnt_sb->s_type->name, "fuse", 5)){
store -= count;
if(store <= (data_free_size_th + CHECK_1TH*2)){
vfs_statfs(&file->f_path, &stat);
store = stat.f_bfree * stat.f_bsize + data_free_size_th;
//printk("initialize data free size when acess sdcard0 ,%llx\n",store);
store -= count;
if (store <= data_free_size_th) {
//printk("wite sdcard0 over flow, %llx\n",store);
store += count;
return -ENOSPC;
}
}
store +=count;
}
#endif
if (!(file->f_mode & FMODE_WRITE))
return -EBADF;
if (!file->f_op || (!file->f_op->write && !file->f_op->aio_write))
return -EINVAL;
if (unlikely(!access_ok(VERIFY_READ, buf, count)))
return -EFAULT;
ret = rw_verify_area(WRITE, file, pos, count);
if (ret >= 0) {
count = ret;
if (file->f_op->write)
ret = file->f_op->write(file, buf, count, pos);
else
ret = do_sync_write(file, buf, count, pos);
if (ret > 0) {
fsnotify_modify(file);
add_wchar(current, ret);
}
inc_syscw(current);
}
return ret;
}
