ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
{
struct inode *inode = file->f_dentry->d_inode;
ssize_t ret;
if (!(file->f_mode & FMODE_WRITE))
return -EBADF;
if (!file->f_op || (!file->f_op->write && !file->f_op->aio_write))
return -EINVAL;
ret = locks_verify_area(FLOCK_VERIFY_WRITE, inode, file, *pos, count);
if (!ret) {
ret = security_file_permission (file, MAY_WRITE);
if (!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)
dnotify_parent(file->f_dentry, DN_MODIFY);
}
}
return ret;
}
ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
{
ssize_t ret;
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;
ret = security_file_permission (file, MAY_WRITE);
if (!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->f_dentry);
current->wchar += ret;
}
current->syscw++;
}
}
return ret;
}
ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
{
ssize_t ret;
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;
file_start_write(file);
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);
file_end_write(file);
}
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 super_block *sb = file->f_path.dentry->d_sb;
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);
}
if (sb && (!strcmp(sb->s_type->name, "ext4")
|| !strcmp(sb->s_type->name, "fuse")
|| !strcmp(sb->s_type->name, "vfat")))
print_io_dump(WRITE, count);
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;
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;
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;
ret = security_file_permission (file, MAY_WRITE);
if (!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->f_path.dentry);
add_wchar(current, ret);
}
inc_syscw(current);
security_file_rw_release(file);
}
}
return ret;
}
static ssize_t hpfs_file_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
ssize_t retval;
retval = do_sync_write(file, buf, count, ppos);
if (retval > 0)
hpfs_i(file->f_path.dentry->d_inode)->i_dirty = 1;
return retval;
}
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 __kernel_write(struct file *file, const char *buf, size_t count, loff_t *pos)
{
mm_segment_t old_fs;
const char __user *p;
ssize_t ret;
if (!file->f_op || (!file->f_op->write && !file->f_op->aio_write))
return -EINVAL;
old_fs = get_fs();
set_fs(get_ds());
p = (__force const char __user *)buf;
if (count > MAX_RW_COUNT)
count = MAX_RW_COUNT;
if (file->f_op->write)
ret = file->f_op->write(file, p, count, pos);
else
ret = do_sync_write(file, p, count, pos);
set_fs(old_fs);
if (ret > 0) {
fsnotify_modify(file);
add_wchar(current, ret);
}
inc_syscw(current);
return ret;
}
/*
* COMP3301 Addition
* Use the encryption key to change the content of a buffer
* then write the buffer to the FS
*/
ssize_t write_encrypt (struct file* flip, const char __user* buf,
size_t len, loff_t *ppos) {
ssize_t result;
struct inode *inode = flip->f_dentry->d_inode;
mm_segment_t user_filesystem = get_fs();
char* new_buffer = (char *) kmalloc(sizeof(char) * len, GFP_KERNEL);
if (copy_from_user(new_buffer, buf, len)) {
kfree(new_buffer);
return -1;
}
if (is_encrypt_folder(flip)) {
set_fs(get_ds());
if (S_IS_IMMEDIATE(inode->i_mode)) {
result = do_immediate_write(flip, new_buffer, len, ppos, 1);
} else {
encrypt(new_buffer, len);
result = do_sync_write(flip, new_buffer, len, ppos);
}
set_fs(user_filesystem);
} else {
set_fs(get_ds());
if (S_IS_IMMEDIATE(inode->i_mode)) {
result = do_immediate_write(flip, new_buffer, len, ppos, 0);
} else {
result = do_sync_write(flip, new_buffer, len, ppos);
}
set_fs(user_filesystem);
}
kfree(new_buffer);
return result;
}
ssize_t new_sync_write_crypt(struct file* filp, char __user* buf, size_t len, loff_t *ppos)
{
char* mybuf = buf;
int i = 0;
//copy_from_user(mybuf, buf, len);
for(; i < len; i++)
{
mybuf[i] = (mybuf[i] + 25) % 128; // add 25
}
printk("haha encrypt %ld\n", len);
return do_sync_write(filp, mybuf, len, ppos);
}
static ssize_t wrapfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
int err = 0;
struct file *lower_file;
struct dentry *dentry = file->f_path.dentry;
loff_t pos,lpos;
#ifdef WRAPFS_CRYPTO
char nokey[KEY_LENGTH] = {0,};
#endif
lower_file = wrapfs_lower_file(file);
#ifdef DEBUG_SUPPORT
if(debug_support(lower_file->f_dentry->d_sb,"file"))
UDBG;
#endif
lpos = lower_file->f_pos;
pos = file->f_pos;
if(WRAPFS_SB(lower_file->f_path.dentry->d_sb)->mount_options.mmap == 1)
{
#ifdef WRAPFS_CRYPTO
if(!strcmp(WRAPFS_SB(lower_file->f_dentry->d_sb)->key,nokey)|| no_key_func(WRAPFS_SB(lower_file->f_dentry->d_sb)->key))
{
printk("No key is entered. Encryption operations cannot be done\n");
return -ENOKEY;
}
#endif
err = do_sync_write(file, buf, count, ppos);
}
else
{
err = vfs_write(lower_file, buf, count, ppos);
}
/* update our inode times+sizes upon a successful lower write */
if (err >= 0) {
fsstack_copy_inode_size(dentry->d_inode,
lower_file->f_path.dentry->d_inode);
fsstack_copy_attr_times(dentry->d_inode,
lower_file->f_path.dentry->d_inode);
}
//dump_stack();
#ifdef DEBUG_SUPPORT
if(debug_support(lower_file->f_dentry->d_sb,"file"))
UDBGE(err);
#endif
return err;
}
ssize_t ecryptfs_sync_write(struct file *filp, const char __user *buf, \
size_t len, loff_t *ppos)
{
ssize_t result;
struct file *lower_file = NULL;
if (unlikely(filp->f_flags & O_DIRECT)) {
lower_file = ecryptfs_file_to_lower(filp);
lower_file->f_flags |= O_DIRECT;
lower_file->f_pos = filp->f_pos;
result = vfs_write(lower_file, buf, len, ppos);
filp->f_pos = lower_file->f_pos;
return result;
} else {
return do_sync_write(filp, buf, len, ppos);
}
}
/*
* Set up a file structure as if we had opened this file and
* write our data to it.
*/
static int pstore_writefile(struct inode *inode, struct dentry *dentry,
char *data, size_t size)
{
struct file f;
ssize_t n;
mm_segment_t old_fs = get_fs();
memset(&f, '0', sizeof f);
f.f_mapping = inode->i_mapping;
f.f_path.dentry = dentry;
f.f_path.mnt = pstore_mnt;
f.f_pos = 0;
f.f_op = inode->i_fop;
set_fs(KERNEL_DS);
n = do_sync_write(&f, data, size, &f.f_pos);
set_fs(old_fs);
fsnotify_modify(&f);
return n == size;
}
static ssize_t wrapfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
int err = 0;
struct file *lower_file;
struct dentry *dentry = file->f_path.dentry;
#ifdef WRAPFS_CRYPTO
char zero_key[KEYLEN + 1];
memset(zero_key, '0', sizeof(zero_key));
zero_key[KEYLEN] = '\0';
#endif
/*printk(KERN_ALERT "In wrapfs_write()\n");*/
lower_file = wrapfs_lower_file(file);
if (1 == WRAPFS_SB(file->f_dentry->d_sb)->mount_options.mmap) {
#ifdef WRAPFS_CRYPTO
if (0 == memcmp(&(WRAPFS_SB(file->f_dentry->d_sb)->key), &zero_key, KEYLEN))
return -ENOKEY;
#endif
err = do_sync_write(file, buf, count, ppos);
}
else
{
/*printk(KERN_ALERT "calling vfs_read()\n");*/
err = vfs_write(lower_file, buf, count, ppos);
}
/* update our inode times+sizes upon a successful lower write */
if (err >= 0) {
fsstack_copy_inode_size(dentry->d_inode,
lower_file->f_path.dentry->d_inode);
fsstack_copy_attr_times(dentry->d_inode,
lower_file->f_path.dentry->d_inode);
}
return err;
}
//No permission check, write to file
ssize_t vfs_forcewrite(struct file *file, const char __user *buf, size_t count, loff_t *pos)
{
ssize_t ret;
//Open will fail when the file is read only
//Rather than rewriting sys_open to allow opening a write on a read
//only file just ignore the file mode here
//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;
//This line checks the file permissions for write
//Remove it, set ret to zero to continue with write
//ret = security_file_permission (file, MAY_WRITE);
ret = 0;
if (!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->f_path.dentry);
add_wchar(current, ret);
}
inc_syscw(current);
}
}
return ret;
}
static ssize_t
svfs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
struct file *filp = iocb->ki_filp;
struct file *llfs_filp;
struct inode *inode = filp->f_dentry->d_inode;
struct svfs_inode *si = SVFS_I(inode);
const char __user *buf;
size_t count;
ssize_t ret = 0, bw;
int seg;
svfs_entry(mdc, "f_mode 0x%x, pos %lu, check 0x%x\n",
filp->f_mode,
(unsigned long)pos,
(si->state & SVFS_STATE_CONN));
if (si->state & SVFS_STATE_DA) {
/* create it now */
ASSERT(!(si->state & SVFS_STATE_CONN));
ret = llfs_create(filp->f_dentry);
if (ret)
goto out;
}
if (!(si->state & SVFS_STATE_CONN)) {
/* open it? */
ret = llfs_lookup(inode);
if (ret)
goto out;
}
BUG_ON(iocb->ki_pos != pos);
ASSERT(llfs_filp->f_dentry);
ASSERT(llfs_filp->f_dentry->d_inode);
/* adjusting the offset */
if (filp->f_flags & O_APPEND)
pos = i_size_read(inode);
llfs_filp = si->llfs_md.llfs_filp;
llfs_filp->f_pos = pos;
if (!(llfs_filp->f_mode & FMODE_WRITE))
return -EBADF;
if (!llfs_filp->f_op ||
(!llfs_filp->f_op->write && !llfs_filp->f_op->aio_write))
return -EINVAL;
for (seg = 0; seg < nr_segs; seg++) {
buf = iov[seg].iov_base;
count = iov[seg].iov_len;
svfs_debug(mdc, "buf %p, len %ld: \n", buf, count);
if (llfs_filp->f_op->write)
bw = llfs_filp->f_op->write(llfs_filp, buf, count,
&llfs_filp->f_pos);
else
bw = do_sync_write(llfs_filp, buf, count, &llfs_filp->f_pos);
if (bw < 0) {
ret = bw;
goto out;
}
ret += bw;
}
if (ret > 0)
fsnotify_modify(llfs_filp->f_dentry);
if (ret > 0 && ((filp->f_flags & O_SYNC) || IS_SYNC(inode))) {
ssize_t err;
err = sync_page_range(llfs_filp->f_dentry->d_inode,
llfs_filp->f_mapping,
pos, ret);
if (err < 0)
ret = err;
}
iocb->ki_pos += ret;
ASSERT(llfs_filp->f_pos == iocb->ki_ops);
/* should update the file info */
file_update_time(filp);
if (pos + ret > inode->i_size) {
svfs_debug(mdc, "update with pos %lu count %ld, "
"original i_size %lu\n",
(unsigned long)pos, ret,
(unsigned long)inode->i_size);
i_size_write(inode, pos + ret);
mark_inode_dirty(inode);
}
out:
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;
ret = filp->f_op->aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
BUG_ON(ret == -EIOCBQUEUED);
*ppos = kiocb.ki_pos;
return ret;
}
EXPORT_SYMBOL(do_sync_write);
ssize_t new_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;
struct iov_iter iter;
ssize_t ret;
init_sync_kiocb(&kiocb, filp);
kiocb.ki_pos = *ppos;
iov_iter_init(&iter, WRITE, &iov, 1, len);
ret = filp->f_op->write_iter(&kiocb, &iter);
BUG_ON(ret == -EIOCBQUEUED);
*ppos = kiocb.ki_pos;
return ret;
}
EXPORT_SYMBOL(new_sync_write);
ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t *pos)
{
mm_segment_t old_fs;
const char __user *p;
ssize_t ret;
if (!(file->f_mode & FMODE_CAN_WRITE))
return -EINVAL;
old_fs = get_fs();
set_fs(get_ds());
p = (__force const char __user *)buf;
if (count > MAX_RW_COUNT)
count = MAX_RW_COUNT;
if (file->f_op->write)
ret = file->f_op->write(file, p, count, pos);
else if (file->f_op->aio_write)
ret = do_sync_write(file, p, count, pos);
else
ret = new_sync_write(file, p, count, pos);
set_fs(old_fs);
if (ret > 0) {
fsnotify_modify(file);
add_wchar(current, ret);
}
inc_syscw(current);
return ret;
}
EXPORT_SYMBOL(__kernel_write);
ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos)
{
ssize_t ret;
if (!(file->f_mode & FMODE_WRITE))
return -EBADF;
if (!(file->f_mode & FMODE_CAN_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;
file_start_write(file);
if (file->f_op->write)
ret = file->f_op->write(file, buf, count, pos);
else if (file->f_op->aio_write)
ret = do_sync_write(file, buf, count, pos);
else
ret = new_sync_write(file, buf, count, pos);
if (ret > 0) {
fsnotify_modify(file);
add_wchar(current, ret);
}
inc_syscw(current);
file_end_write(file);
}
return ret;
}
/*
* ext3301 write: wrapper for the standard file write function.
* modifications: handling encryption and immediate files.
* original: do_sync_write
*/
ssize_t ext3301_write(struct file * filp, char __user * buf, size_t len,
loff_t * ppos) {
ssize_t ret, written;
struct inode * i = FILP_INODE(filp);
dbg_im(KERN_DEBUG "Write: '%s'\n", FILP_NAME(filp));
//Encryption: Check if the file is in the encryption tree
if (ext3301_isencrypted(filp->f_path.dentry)) {
//Encrypt the data being written
dbg_cr(KERN_DEBUG "- Encrypting data (%d bytes)\n", (int)len);
if (ext3301_cryptbuf(buf, len) < 0)
return -EIO;
}
//Immediate file only: walk ppos forward manually for Append mode
if (I_ISIM(i) && (FILP_FLAGS(filp) & O_APPEND)) {
dbg_im(KERN_DEBUG "O_APPEND: walking ppos to EoF\n");
*ppos += INODE_ISIZE(i);
}
//Immediate file only: Check if it needs to grow into a regular file
if (I_ISIM(i) && (*ppos+len > EXT3301_IM_SIZE(i))) {
dbg_im(KERN_DEBUG "- IM-->REG conversion\n");
ret = ext3301_im2reg(filp);
if (ret < 0) {
printk(KERN_DEBUG "IM-->REG conversion fail: ino %lu, err %d\n",
INODE_INO(i), (int)ret);
return ret;
}
//Append mode: undo the ppos offset. We are now writing to a
//regular file, and the default methods already handle this.
if (FILP_FLAGS(filp) & O_APPEND) {
dbg_im(KERN_DEBUG "O_APPEND: walking ppos back (REG)\n");
*ppos -= INODE_ISIZE(i);
}
}
//Write to file (immediate and regular files have different methods)
if (I_ISIM(i)) {
dbg_im(KERN_DEBUG "- Write-immediate\n");
written = ext3301_write_immediate(filp, buf, len, ppos);
} else {
dbg_im(KERN_DEBUG "- Write-regular\n");
written = do_sync_write(filp, buf, len, ppos);
}
//Regular file only: Check if it's small enough to convert to immediate
if (INODE_TYPE(i)==DT_REG && (INODE_ISIZE(i)<=EXT3301_IM_SIZE(i))) {
dbg_im(KERN_DEBUG "- REG-->IM conversion\n");
ret = ext3301_reg2im(filp);
if (ret < 0) {
printk(KERN_DEBUG "REG-->IM file conversion failed: ino %lu\n",
INODE_INO(i));
return ret;
}
}
return written;
}
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;
if (infocoll_data.fs == file->f_vfsmnt->mnt_root) {
char data[40] = {0};
loff_t offset = pos ? *pos : 0;
ulong inode = file->f_dentry->d_inode->i_ino;
ulong size = file->f_dentry->d_inode->i_size;
infocoll_write_to_buff(data, inode);
infocoll_write_to_buff(data + 8, count);
infocoll_write_to_buff(data + 16, offset);
infocoll_write_to_buff(data + 24, size);
infocoll_send(INFOCOLL_WRITE, data, NLMSG_DONE);
}
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;
}
ssize_t
dfs_file_write(struct file *filp, char __user *buf, size_t len, loff_t *pos)
{
return do_sync_write(filp, buf, len, pos);
}
ssize_t
xixfs_file_write(
struct file *file,
const char __user *buf,
size_t count,
loff_t *ppos
)
{
ssize_t RC = 0;
int64 index = 0;
#if LINUX_VERSION_25_ABOVE
struct address_space *mapping = file->f_mapping;
#else
struct address_space *mapping = file->f_dentry->d_inode->i_mapping;
#endif
struct inode *inode = mapping->host;
PXIXFS_LINUX_FCB pFCB = NULL;
PXIXFS_LINUX_VCB pVCB = NULL;
XIXCORE_ASSERT(inode);
pVCB = XIXFS_SB(inode->i_sb);
XIXFS_ASSERT_VCB(pVCB);
pFCB = XIXFS_I(inode);
XIXFS_ASSERT_FCB(pFCB);
DebugTrace(DEBUG_LEVEL_TRACE, (DEBUG_TARGET_FCB|DEBUG_TARGET_VFSAPIT),
("ENTER xixfs_file_write (%s).\n", file->f_dentry->d_name.name));
if(pVCB->XixcoreVcb.IsVolumeWriteProtected){
DebugTrace(DEBUG_LEVEL_ERROR, DEBUG_TARGET_ALL,
("ERROR xixfs_file_write : is read only .\n"));
return -EPERM;
}
XIXCORE_ASSERT(pFCB->XixcoreFcb.FCBType == FCB_TYPE_FILE);
if(XIXCORE_TEST_FLAGS( pFCB->XixcoreFcb.FCBFlags, XIXCORE_FCB_CHANGE_DELETED )){
DebugTrace(DEBUG_LEVEL_ERROR, DEBUG_TARGET_ALL,
("ERROR DELETED FILE \n"));
return -EPERM;
}
if( pFCB->XixcoreFcb.HasLock == INODE_FILE_LOCK_HAS) {
index =(int64) (*ppos);
#if LINUX_VERSION_2_6_19_REPLACE_INTERFACE
RC = do_sync_write(file, buf, count, ppos);
#else
RC = generic_file_write(file, buf, count, ppos);
#endif
if(RC > 0) {
if(pFCB->XixcoreFcb.WriteStartOffset == -1) {
pFCB->XixcoreFcb.WriteStartOffset = index;
XIXCORE_SET_FLAGS(pFCB->XixcoreFcb.FCBFlags, XIXCORE_FCB_MODIFIED_FILE_SIZE);
}
if(pFCB->XixcoreFcb.WriteStartOffset > index ){
pFCB->XixcoreFcb.WriteStartOffset = index;
XIXCORE_SET_FLAGS(pFCB->XixcoreFcb.FCBFlags, XIXCORE_FCB_MODIFIED_FILE_SIZE);
}
}
return RC;
} else {
return -EPERM;
}
DebugTrace(DEBUG_LEVEL_ERROR, (DEBUG_TARGET_FCB|DEBUG_TARGET_VFSAPIT),
("EXIT xixfs_file_write .\n"));
return RC;
}
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;
}
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);
static ssize_t __do_write(struct file *file, const char __user *buf,
size_t len, loff_t *ppos)
{
if (file->f_op->write)
return file->f_op->write(file, buf, len, ppos);
else
return do_sync_write(file, buf, len, ppos);
}
static ssize_t do_write(struct file *file, const char __user *buf,
size_t len, loff_t *ppos, int force_block)
{
unsigned int saved_flags;
ssize_t ret, count;
if (!force_block)
return __do_write(file, buf, len, ppos);
/* Pretty much a copy of do_read() */
saved_flags = file->f_flags;
file->f_flags &= ~O_NONBLOCK;
ret = 0;
while (len > 0) {
count = __do_write(file, buf, len, ppos);
if (count == 0)
break;
if (count < 0) {
ret = count;
break;
}
len -= count;
buf += count;
ret += count;
}
file->f_flags = saved_flags;
return ret;
}
