static int rtems_jffs2_fstat(
const rtems_filesystem_location_info_t *loc,
struct stat *buf
)
{
struct _inode *inode = rtems_jffs2_get_inode_by_location(loc);
struct super_block *sb = inode->i_sb;
rtems_jffs2_flash_control *fc = sb->s_flash_control;
rtems_jffs2_do_lock(sb);
buf->st_dev = fc->device_identifier;
buf->st_blksize = PAGE_SIZE;
buf->st_mode = inode->i_mode;
buf->st_ino = inode->i_ino;
buf->st_nlink = inode->i_nlink;
buf->st_uid = inode->i_uid;
buf->st_gid = inode->i_gid;
buf->st_size = inode->i_size;
buf->st_atime = inode->i_atime;
buf->st_mtime = inode->i_mtime;
buf->st_ctime = inode->i_ctime;
rtems_jffs2_do_unlock(sb);
return 0;
}
static void rtems_jffs2_lock(const rtems_filesystem_mount_table_entry_t *mt_entry)
{
const rtems_jffs2_fs_info *fs_info = mt_entry->fs_info;
const struct super_block *sb = &fs_info->sb;
rtems_jffs2_do_lock(sb);
}
static ssize_t rtems_jffs2_dir_read(rtems_libio_t *iop, void *buf, size_t len)
{
struct _inode *inode = rtems_jffs2_get_inode_by_iop(iop);
struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
struct dirent *de = buf;
off_t fd_off = 2;
int eno = 0;
struct jffs2_full_dirent *fd;
off_t begin;
off_t end;
off_t off;
rtems_jffs2_do_lock(inode->i_sb);
fd = f->dents;
begin = iop->offset;
end = begin + len / sizeof(*de);
off = begin;
if (off == 0 && off < end) {
eno = rtems_jffs2_fill_dirent(de, off, inode->i_ino, ".");
assert(eno == 0);
++off;
++de;
}
if (off == 1 && off < end) {
eno = rtems_jffs2_fill_dirent(de, off, inode->i_parent->i_ino, "..");
assert(eno == 0);
++off;
++de;
}
while (eno == 0 && off < end && fd != NULL) {
if (fd->ino != 0) {
if (off == fd_off) {
eno = rtems_jffs2_fill_dirent(de, off, fd->ino, fd->name);
++off;
++de;
}
++fd_off;
}
fd = fd->next;
}
rtems_jffs2_do_unlock(inode->i_sb);
if (eno == 0) {
iop->offset = off;
return (off - begin) * sizeof(*de);
} else {
return rtems_jffs2_eno_to_rv_and_errno(eno);
}
}
static int rtems_jffs2_file_ftruncate(rtems_libio_t *iop, off_t length)
{
struct _inode *inode = rtems_jffs2_get_inode_by_iop(iop);
struct iattr iattr;
int eno;
iattr.ia_valid = ATTR_SIZE | ATTR_MTIME | ATTR_CTIME;
iattr.ia_size = length;
iattr.ia_mtime = get_seconds();
iattr.ia_ctime = iattr.ia_mtime;
rtems_jffs2_do_lock(inode->i_sb);
eno = -jffs2_do_setattr(inode, &iattr);
rtems_jffs2_do_unlock(inode->i_sb);
return rtems_jffs2_eno_to_rv_and_errno(eno);
}
static ssize_t rtems_jffs2_file_read(rtems_libio_t *iop, void *buf, size_t len)
{
struct _inode *inode = rtems_jffs2_get_inode_by_iop(iop);
struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
int err = 0;
off_t pos;
rtems_jffs2_do_lock(inode->i_sb);
pos = iop->offset;
if (pos >= inode->i_size) {
len = 0;
} else {
uint32_t pos_32 = (uint32_t) pos;
uint32_t max_available = inode->i_size - pos_32;
if (len > max_available) {
len = max_available;
}
err = jffs2_read_inode_range(c, f, buf, pos_32, len);
}
if (err == 0) {
iop->offset += len;
}
rtems_jffs2_do_unlock(inode->i_sb);
if (err == 0) {
return (ssize_t) len;
} else {
errno = -err;
return -1;
}
}
static int rtems_jffs2_fstat(
const rtems_filesystem_location_info_t *loc,
struct stat *buf
)
{
struct _inode *inode = rtems_jffs2_get_inode_by_location(loc);
rtems_jffs2_do_lock(inode->i_sb);
buf->st_blksize = PAGE_SIZE;
buf->st_mode = inode->i_mode;
buf->st_ino = inode->i_ino;
buf->st_nlink = inode->i_nlink;
buf->st_uid = inode->i_uid;
buf->st_gid = inode->i_gid;
buf->st_size = inode->i_size;
buf->st_atime = inode->i_atime;
buf->st_mtime = inode->i_mtime;
buf->st_ctime = inode->i_ctime;
rtems_jffs2_do_unlock(inode->i_sb);
return 0;
}
static ssize_t rtems_jffs2_file_write(rtems_libio_t *iop, const void *buf, size_t len)
{
struct _inode *inode = rtems_jffs2_get_inode_by_iop(iop);
struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
struct jffs2_raw_inode ri;
uint32_t writtenlen;
off_t pos;
int eno = 0;
memset(&ri, 0, sizeof(ri));
ri.ino = cpu_to_je32(f->inocache->ino);
ri.mode = cpu_to_jemode(inode->i_mode);
ri.uid = cpu_to_je16(inode->i_uid);
ri.gid = cpu_to_je16(inode->i_gid);
ri.atime = ri.ctime = ri.mtime = cpu_to_je32(get_seconds());
rtems_jffs2_do_lock(inode->i_sb);
if ((iop->flags & LIBIO_FLAGS_APPEND) == 0) {
pos = iop->offset;
} else {
pos = inode->i_size;
}
if (pos > inode->i_size) {
ri.version = cpu_to_je32(++f->highest_version);
eno = -jffs2_extend_file(inode, &ri, pos);
}
if (eno == 0) {
ri.isize = cpu_to_je32(inode->i_size);
eno = -jffs2_write_inode_range(c, f, &ri, (void *) buf, pos, len, &writtenlen);
}
if (eno == 0) {
pos += writtenlen;
inode->i_mtime = inode->i_ctime = je32_to_cpu(ri.mtime);
if (pos > inode->i_size) {
inode->i_size = pos;
}
iop->offset = pos;
if (writtenlen != len) {
eno = ENOSPC;
}
}
rtems_jffs2_do_unlock(inode->i_sb);
if (eno == 0) {
return writtenlen;
} else {
errno = eno;
return -1;
}
}