static int filldir(struct ubifs_info *c, const char *name, int namlen,
u64 ino, unsigned int d_type)
{
struct inode *inode;
char filetime[32];
switch (d_type) {
case UBIFS_ITYPE_REG:
printf("\t");
break;
case UBIFS_ITYPE_DIR:
printf("<DIR>\t");
break;
case UBIFS_ITYPE_LNK:
printf("<LNK>\t");
break;
default:
printf("other\t");
break;
}
inode = ubifs_iget(c->vfs_sb, ino);
if (IS_ERR(inode)) {
printf("%s: Error in ubifs_iget(), ino=%lld ret=%p!\n",
__func__, ino, inode);
return -1;
}
ctime_r((time_t *)&inode->i_mtime, filetime);
printf("%9lld %24.24s ", inode->i_size, filetime);
ubifs_iput(inode);
printf("%s\n", name);
return 0;
}
static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
unsigned int flags)
{
int err;
union ubifs_key key;
struct inode *inode = NULL;
struct ubifs_dent_node *dent;
struct ubifs_info *c = dir->i_sb->s_fs_info;
dbg_gen("'%pd' in dir ino %lu", dentry, dir->i_ino);
if (dentry->d_name.len > UBIFS_MAX_NLEN)
return ERR_PTR(-ENAMETOOLONG);
dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
if (!dent)
return ERR_PTR(-ENOMEM);
dent_key_init(c, &key, dir->i_ino, &dentry->d_name);
err = ubifs_tnc_lookup_nm(c, &key, dent, &dentry->d_name);
if (err) {
if (err == -ENOENT) {
dbg_gen("not found");
goto done;
}
goto out;
}
if (dbg_check_name(c, dent, &dentry->d_name)) {
err = -EINVAL;
goto out;
}
inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
if (IS_ERR(inode)) {
/*
* This should not happen. Probably the file-system needs
* checking.
*/
err = PTR_ERR(inode);
ubifs_err(c, "dead directory entry '%pd', error %d",
dentry, err);
ubifs_ro_mode(c, err);
goto out;
}
done:
kfree(dent);
/*
* Note, d_splice_alias() would be required instead if we supported
* NFS.
*/
d_add(dentry, inode);
return NULL;
out:
kfree(dent);
return ERR_PTR(err);
}
int ubifs_size(const char *filename, loff_t *size)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum;
struct inode *inode;
int err = 0;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
inum = ubifs_findfile(ubifs_sb, (char *)filename);
if (!inum) {
err = -1;
goto out;
}
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
*size = inode->i_size;
ubifs_iput(inode);
out:
ubi_close_volume(c->ubi);
return err;
}
int ubifs_filesize(char *filename, u32* size)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum=0;
struct inode *inode=NULL;
int err = 0;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
if (IS_ERR(c->ubi)) {
err = PTR_ERR(c->ubi);
goto out_no_close;
}
inum = ubifs_findfile(ubifs_sb, filename);
if (!inum) {
err = -1;
goto out;
}
/*
* Read file inode
*/
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize
*/
//if ((size == 0) || (size > inode->i_size))
*size = inode->i_size;
printf("ubifs_filesize %08x \n", *size);
//return 0;
out:
ubi_close_volume(c->ubi);
out_no_close:
return err;
}
int ubifs_load(char *filename, u32 addr, u32 size)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum;
struct inode *inode;
struct page page;
int err = 0;
int i;
int count;
int last_block_size = 0;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
/* ubifs_findfile will resolve symlinks, so we know that we get
* the real file here */
inum = ubifs_findfile(ubifs_sb, filename);
if (!inum) {
err = -1;
goto out;
}
/*
* Read file inode
*/
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize
*/
if ((size == 0) || (size > inode->i_size))
size = inode->i_size;
count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
printf("Loading file '%s' to addr 0x%08x with size %d (0x%08x)...\n",
filename, addr, size, size);
page.addr = (void *)addr;
page.index = 0;
page.inode = inode;
for (i = 0; i < count; i++) {
/*
* Make sure to not read beyond the requested size
*/
if ((i + 1) == count)
last_block_size = size - (i * PAGE_SIZE);
err = do_readpage(c, inode, &page, last_block_size);
if (err)
break;
page.addr += PAGE_SIZE;
page.index++;
}
if (err)
printf("Error reading file '%s'\n", filename);
else
printf("Done\n");
ubifs_iput(inode);
out:
ubi_close_volume(c->ubi);
return err;
}
static unsigned long ubifs_findfile(struct super_block *sb, char *filename)
{
int ret;
char *next;
char fpath[128];
char symlinkpath[128];
char *name = fpath;
unsigned long root_inum = 1;
unsigned long inum;
int symlink_count = 0; /* Don't allow symlink recursion */
char link_name[64];
strcpy(fpath, filename);
/* Remove all leading slashes */
while (*name == '/')
name++;
/*
* Handle root-direcoty ('/')
*/
inum = root_inum;
if (!name || *name == '\0')
return inum;
for (;;) {
struct inode *inode;
struct ubifs_inode *ui;
/* Extract the actual part from the pathname. */
next = strchr(name, '/');
if (next) {
/* Remove all leading slashes. */
while (*next == '/')
*(next++) = '\0';
}
ret = ubifs_finddir(sb, name, root_inum, &inum);
if (!ret)
return 0;
inode = ubifs_iget(sb, inum);
if (!inode)
return 0;
ui = ubifs_inode(inode);
if ((inode->i_mode & S_IFMT) == S_IFLNK) {
char buf[128];
/* We have some sort of symlink recursion, bail out */
if (symlink_count++ > 8) {
printf("Symlink recursion, aborting\n");
return 0;
}
memcpy(link_name, ui->data, ui->data_len);
link_name[ui->data_len] = '\0';
if (link_name[0] == '/') {
/* Absolute path, redo everything without
* the leading slash */
next = name = link_name + 1;
root_inum = 1;
continue;
}
/* Relative to cur dir */
sprintf(buf, "%s/%s",
link_name, next == NULL ? "" : next);
memcpy(symlinkpath, buf, sizeof(buf));
next = name = symlinkpath;
continue;
}
/*
* Check if directory with this name exists
*/
/* Found the node! */
if (!next || *next == '\0')
return inum;
root_inum = inum;
name = next;
}
return 0;
}
int ubifs_load(char *filename, u32 addr, u32 size)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum;
struct inode *inode;
struct page page;
int err = 0;
int i;
int count;
char link_name[64];
struct ubifs_inode *ui;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
inum = ubifs_findfile(ubifs_sb, filename);
if (!inum) {
err = -1;
goto out;
}
/*
* Read file inode
*/
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
/*
* Check for symbolic link
*/
ui = ubifs_inode(inode);
if (((inode->i_mode & S_IFMT) == S_IFLNK) && ui->data_len) {
memcpy(link_name, ui->data, ui->data_len);
printf("%s is linked to %s!\n", filename, link_name);
ubifs_iput(inode);
/*
* Now we have the "real" filename, call ubifs_load()
* again (recursive call) to load this file instead
*/
return ubifs_load(link_name, addr, size);
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize
*/
if ((size == 0) || (size > inode->i_size))
size = inode->i_size;
count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
printf("Loading file '%s' to addr 0x%08x with size %d (0x%08x)...\n",
filename, addr, size, size);
page.addr = (void *)addr;
page.index = 0;
page.inode = inode;
for (i = 0; i < count; i++) {
err = do_readpage(c, inode, &page);
if (err)
break;
page.addr += PAGE_SIZE;
page.index++;
}
if (err)
printf("Error reading file '%s'\n", filename);
else
printf("Done\n");
ubifs_iput(inode);
out:
ubi_close_volume(c->ubi);
return err;
}
static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
{
struct ubi_volume_desc *ubi = sb->s_fs_info;
struct ubifs_info *c;
struct inode *root;
int err;
c = kzalloc(sizeof(struct ubifs_info), GFP_KERNEL);
if (!c)
return -ENOMEM;
spin_lock_init(&c->cnt_lock);
spin_lock_init(&c->cs_lock);
spin_lock_init(&c->buds_lock);
spin_lock_init(&c->space_lock);
spin_lock_init(&c->orphan_lock);
init_rwsem(&c->commit_sem);
mutex_init(&c->lp_mutex);
mutex_init(&c->tnc_mutex);
mutex_init(&c->log_mutex);
mutex_init(&c->mst_mutex);
mutex_init(&c->umount_mutex);
init_waitqueue_head(&c->cmt_wq);
c->buds = RB_ROOT;
c->old_idx = RB_ROOT;
c->size_tree = RB_ROOT;
c->orph_tree = RB_ROOT;
INIT_LIST_HEAD(&c->infos_list);
INIT_LIST_HEAD(&c->idx_gc);
INIT_LIST_HEAD(&c->replay_list);
INIT_LIST_HEAD(&c->replay_buds);
INIT_LIST_HEAD(&c->uncat_list);
INIT_LIST_HEAD(&c->empty_list);
INIT_LIST_HEAD(&c->freeable_list);
INIT_LIST_HEAD(&c->frdi_idx_list);
INIT_LIST_HEAD(&c->unclean_leb_list);
INIT_LIST_HEAD(&c->old_buds);
INIT_LIST_HEAD(&c->orph_list);
INIT_LIST_HEAD(&c->orph_new);
c->highest_inum = UBIFS_FIRST_INO;
c->lhead_lnum = c->ltail_lnum = UBIFS_LOG_LNUM;
ubi_get_volume_info(ubi, &c->vi);
ubi_get_device_info(c->vi.ubi_num, &c->di);
/* Re-open the UBI device in read-write mode */
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
if (IS_ERR(c->ubi)) {
err = PTR_ERR(c->ubi);
goto out_free;
}
c->vfs_sb = sb;
sb->s_fs_info = c;
sb->s_magic = UBIFS_SUPER_MAGIC;
sb->s_blocksize = UBIFS_BLOCK_SIZE;
sb->s_blocksize_bits = UBIFS_BLOCK_SHIFT;
sb->s_dev = c->vi.cdev;
sb->s_maxbytes = c->max_inode_sz = key_max_inode_size(c);
if (c->max_inode_sz > MAX_LFS_FILESIZE)
sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE;
if (c->rw_incompat) {
ubifs_err("the file-system is not R/W-compatible");
ubifs_msg("on-flash format version is w%d/r%d, but software "
"only supports up to version w%d/r%d", c->fmt_version,
c->ro_compat_version, UBIFS_FORMAT_VERSION,
UBIFS_RO_COMPAT_VERSION);
return -EROFS;
}
mutex_lock(&c->umount_mutex);
err = mount_ubifs(c);
if (err) {
ubifs_assert(err < 0);
goto out_unlock;
}
/* Read the root inode */
root = ubifs_iget(sb, UBIFS_ROOT_INO);
if (IS_ERR(root)) {
err = PTR_ERR(root);
goto out_umount;
}
sb->s_root = NULL;
mutex_unlock(&c->umount_mutex);
return 0;
out_umount:
ubifs_umount(c);
out_unlock:
mutex_unlock(&c->umount_mutex);
ubi_close_volume(c->ubi);
out_free:
kfree(c);
return err;
}
static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
unsigned int flags)
{
int err;
union ubifs_key key;
struct inode *inode = NULL;
struct ubifs_dent_node *dent;
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct fscrypt_name nm;
dbg_gen("'%pd' in dir ino %lu", dentry, dir->i_ino);
if (ubifs_crypt_is_encrypted(dir)) {
err = fscrypt_get_encryption_info(dir);
/*
* DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is
* created while the directory was encrypted and we
* have access to the key.
*/
if (fscrypt_has_encryption_key(dir))
fscrypt_set_encrypted_dentry(dentry);
fscrypt_set_d_op(dentry);
if (err && err != -ENOKEY)
return ERR_PTR(err);
}
err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
if (err)
return ERR_PTR(err);
if (fname_len(&nm) > UBIFS_MAX_NLEN) {
err = -ENAMETOOLONG;
goto out_fname;
}
dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
if (!dent) {
err = -ENOMEM;
goto out_fname;
}
if (nm.hash) {
ubifs_assert(fname_len(&nm) == 0);
ubifs_assert(fname_name(&nm) == NULL);
dent_key_init_hash(c, &key, dir->i_ino, nm.hash);
err = ubifs_tnc_lookup_dh(c, &key, dent, nm.minor_hash);
} else {
dent_key_init(c, &key, dir->i_ino, &nm);
err = ubifs_tnc_lookup_nm(c, &key, dent, &nm);
}
if (err) {
if (err == -ENOENT) {
dbg_gen("not found");
goto done;
}
goto out_dent;
}
if (dbg_check_name(c, dent, &nm)) {
err = -EINVAL;
goto out_dent;
}
inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
if (IS_ERR(inode)) {
/*
* This should not happen. Probably the file-system needs
* checking.
*/
err = PTR_ERR(inode);
ubifs_err(c, "dead directory entry '%pd', error %d",
dentry, err);
ubifs_ro_mode(c, err);
goto out_dent;
}
if (ubifs_crypt_is_encrypted(dir) &&
(S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
!fscrypt_has_permitted_context(dir, inode)) {
ubifs_warn(c, "Inconsistent encryption contexts: %lu/%lu",
dir->i_ino, inode->i_ino);
err = -EPERM;
goto out_inode;
}
done:
kfree(dent);
fscrypt_free_filename(&nm);
/*
* Note, d_splice_alias() would be required instead if we supported
* NFS.
*/
d_add(dentry, inode);
return NULL;
out_inode:
iput(inode);
out_dent:
kfree(dent);
out_fname:
fscrypt_free_filename(&nm);
return ERR_PTR(err);
}
int ubifs_read(const char *filename, void *buf, loff_t offset,
loff_t size, loff_t *actread)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum;
struct inode *inode;
struct page page;
int err = 0;
int i;
int count;
int last_block_size = 0;
*actread = 0;
if (offset & (PAGE_SIZE - 1)) {
printf("ubifs: Error offset must be a multple of %d\n",
PAGE_SIZE);
return -1;
}
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
/* ubifs_findfile will resolve symlinks, so we know that we get
* the real file here */
inum = ubifs_findfile(ubifs_sb, (char *)filename);
if (!inum) {
err = -1;
goto out;
}
/*
* Read file inode
*/
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
if (offset > inode->i_size) {
printf("ubifs: Error offset (%lld) > file-size (%lld)\n",
offset, size);
err = -1;
goto put_inode;
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize
*/
if ((size == 0) || (size > (inode->i_size - offset)))
size = inode->i_size - offset;
count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
page.addr = buf;
page.index = offset / PAGE_SIZE;
page.inode = inode;
for (i = 0; i < count; i++) {
/*
* Make sure to not read beyond the requested size
*/
if (((i + 1) == count) && (size < inode->i_size))
last_block_size = size - (i * PAGE_SIZE);
err = do_readpage(c, inode, &page, last_block_size);
if (err)
break;
page.addr += PAGE_SIZE;
page.index++;
}
if (err) {
printf("Error reading file '%s'\n", filename);
*actread = i * PAGE_SIZE;
} else {
*actread = size;
}
put_inode:
ubifs_iput(inode);
out:
ubi_close_volume(c->ubi);
return err;
}
int ubifs_part_load(char *filename, u32 addr, u32 offset, u32 size)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum=0;
struct inode *inode=NULL;
struct page page;
int err = 0;
int i=0;
int count=0;
int last_block_size = 0;
char link_name[64];
struct ubifs_inode *ui=NULL;
if(offset % PAGE_SIZE != 0)
{
printf("%s: offset(0x%x) should align to page size(0x%x), at %d\n", __func__, offset, PAGE_SIZE, __LINE__);
return 1;
}
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
if (IS_ERR(c->ubi)) {
err = PTR_ERR(c->ubi);
goto out_no_close;
}
inum = ubifs_findfile(ubifs_sb, filename);
if (!inum) {
err = -1;
goto out;
}
/*
* Read file inode
*/
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
/*
* Check for symbolic link
*/
ui = ubifs_inode(inode);
if (((inode->i_mode & S_IFMT) == S_IFLNK) && ui->data_len) {
memcpy(link_name, ui->data, ui->data_len);
link_name[ui->data_len] = '\0';
printf("%s is linked to %s!\n", filename, link_name);
ubifs_iput(inode);
/*
* Now we have the "real" filename, call ubifs_load()
* again (recursive call) to load this file instead
*/
return ubifs_part_load(link_name, addr, offset, size);
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize
*/
if ((size == 0) || (size > inode->i_size))
size = inode->i_size;
count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
printf("Loading file '%s' to addr 0x%08x with size %d (0x%08x)...\n",
filename, addr, size, size);
page.addr = (void *)addr;
page.index = (offset / PAGE_SIZE);
page.inode = inode;
//offset
for (i = 0; i < count; i++) {
/*
* Make sure to not read beyond the requested size
*/
if (((i + 1) == count) && (size < inode->i_size))
last_block_size = size - (i * PAGE_SIZE);
err = do_readpage(c, inode, &page, last_block_size);
if (err)
break;
page.addr += PAGE_SIZE;
page.index++;
}
if (err)
printf("Error reading file '%s'\n", filename);
else
printf("Done\n");
ubifs_iput(inode);
out:
ubi_close_volume(c->ubi);
out_no_close:
return err;
}