int op_read (const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi)
{
__u64 pos;
errcode_t rc;
unsigned int bytes;
ext2_file_t efile = EXT2FS_FILE(fi->fh);
ext2_filsys e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s", path);
efile = do_open(e2fs, path, O_RDONLY);
rc = ext2fs_file_llseek(efile, offset, SEEK_SET, &pos);
if (rc) {
do_release(efile);
return -EINVAL;
}
rc = ext2fs_file_read(efile, buf, size, &bytes);
if (rc) {
do_release(efile);
return -EIO;
}
do_release(efile);
debugf("leave");
return bytes;
}
int op_create (const char *path, mode_t mode, struct fuse_file_info *fi)
{
int rt;
struct ext2_vnode * vnode;
ext2_filsys e2fs;
FUSE_EXT2_LOCK;
e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s, mode: 0%o", path, mode);
fi->fh = (unsigned long) (vnode = do_open(e2fs, path, fi->flags));
if (vnode != NULL) {
debugf("leave");
FUSE_EXT2_UNLOCK;
return 0;
}
rt = do_create(e2fs, path, mode, 0, NULL);
if (rt != 0) {
FUSE_EXT2_UNLOCK;
return rt;
}
fi->fh = (unsigned long) (vnode = do_open(e2fs, path, fi->flags));
if (vnode == NULL) {
debugf("op_open(path, fi); failed");
FUSE_EXT2_UNLOCK;
return -EIO;
}
debugf("leave");
FUSE_EXT2_UNLOCK;
return 0;
}
int op_create (const char *path, mode_t mode, struct fuse_file_info *fi)
{
int rt;
ext2_filsys e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s, mode: 0%o", path, mode);
if (op_open(path, fi) == 0) {
debugf("leave");
return 0;
}
rt = do_create(e2fs, path, mode, 0, NULL);
if (rt != 0) {
return rt;
}
if (op_open(path, fi)) {
debugf("op_open(path, fi); failed");
return -EIO;
}
debugf("leave");
return 0;
}
int op_mknod (const char *path, mode_t mode, dev_t dev)
{
int rt;
ext2_filsys e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s 0%o", path, mode);
rt = do_create(e2fs, path, mode, dev, NULL);
debugf("leave");
return rt;
}
int op_access (const char *path, int mask)
{
ext2_filsys e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s, mask = 0%o", path, mask);
if ((mask & W_OK) && !(e2fs->flags & EXT2_FLAG_RW)) {
return -1;
}
debugf("leave");
return 0;
}
int op_statfs (const char *path, struct statvfs *buf)
{
unsigned long long i;
unsigned long long s_gdb_count = 0;
unsigned long long s_groups_count = 0;
unsigned long long s_itb_per_group = 0;
unsigned long long s_overhead_last = 0;
unsigned long long s_inodes_per_block = 0;
ext2_filsys e2fs;
FUSE_EXT2_LOCK;
e2fs = current_ext2fs();
debugf("enter");
memset(buf, 0, sizeof(struct statvfs));
if (e2fs->super->s_default_mount_opts & EXT2_MOUNT_MINIX_DF) {
s_overhead_last = 0;
} else {
s_overhead_last = e2fs->super->s_first_data_block;
s_groups_count = ((EXT2_BLOCKS_COUNT(e2fs->super) - e2fs->super->s_first_data_block - 1) / e2fs->super->s_blocks_per_group) + 1;
s_gdb_count = (s_groups_count + EXT2_DESC_PER_BLOCK(e2fs->super) - 1) / EXT2_DESC_PER_BLOCK(e2fs->super);
for (i = 0; i < s_groups_count; i++) {
s_overhead_last += ext2_bg_has_super(e2fs, i) + ((ext2_bg_num_gdb(e2fs, i) == 0) ? 0 : s_gdb_count);
}
s_inodes_per_block = EXT2_BLOCK_SIZE(e2fs->super) / EXT2_INODE_SIZE(e2fs->super);
s_itb_per_group = e2fs->super->s_inodes_per_group / s_inodes_per_block;
s_overhead_last += (s_groups_count * (2 + s_itb_per_group));
}
buf->f_bsize = EXT2_BLOCK_SIZE(e2fs->super);
buf->f_frsize = /*EXT2_FRAG_SIZE(e2fs->super);*/ buf->f_bsize;
buf->f_blocks = EXT2_BLOCKS_COUNT(e2fs->super) - s_overhead_last;
buf->f_bfree = EXT2_FBLOCKS_COUNT(e2fs->super);
if (EXT2_FBLOCKS_COUNT(e2fs->super) < EXT2_RBLOCKS_COUNT(e2fs->super)) {
buf->f_bavail = 0;
} else {
buf->f_bavail = EXT2_FBLOCKS_COUNT(e2fs->super) - EXT2_RBLOCKS_COUNT(e2fs->super);
}
buf->f_files = e2fs->super->s_inodes_count;
buf->f_ffree = e2fs->super->s_free_inodes_count;
buf->f_favail = e2fs->super->s_free_inodes_count;
buf->f_namemax = EXT2_NAME_LEN;
debugf("leave");
FUSE_EXT2_UNLOCK;
return 0;
}
int op_fsync (const char *path, int datasync, struct fuse_file_info *fi)
{
errcode_t rc;
ext2_filsys e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s (%p)", path, fi);
rc = ext2fs_flush(e2fs);
if (rc) {
return -EIO;
}
debugf("leave");
return 0;
}
int op_write (const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi)
{
size_t rt;
ext2_file_t efile = EXT2FS_FILE(fi->fh);
ext2_filsys e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s", path);
efile = do_open(e2fs, path, O_WRONLY);
rt = do_write(efile, buf, size, offset);
do_release(efile);
debugf("leave");
return rt;
}
int op_chown (const char *path, uid_t uid, gid_t gid)
{
int rt;
errcode_t rc;
ext2_ino_t ino;
struct ext2_vnode *vnode;
struct ext2_inode *inode;
ext2_filsys e2fs;
FUSE_EXT2_LOCK;
e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s", path);
rt = do_readvnode(e2fs, path, &ino, &vnode, DONT_OPEN_FILE);
if (rt) {
debugf("do_readvnode(%s, &ino, &vnode); failed", path);
goto err;
}
inode = vnode2inode(vnode);
if (uid != -1)
inode->i_gid = gid;
if (gid != -1)
inode->i_uid = uid;
rc=vnode_put(vnode,1);
if (rc) {
debugf("vnode_put(vnode,1); failed");
rt = -EIO;
goto err;
}
rt = 0;
err:
debugf("leave");
FUSE_EXT2_UNLOCK;
return rt;
}
int op_chmod (const char *path, mode_t mode)
{
int rt;
int mask;
time_t tm;
ext2_ino_t ino;
struct ext2_inode inode;
ext2_filsys e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s 0%o", path, mode);
rt = do_check(path);
if (rt != 0) {
debugf("do_check(%s); failed", path);
return rt;
}
rt = do_readinode(e2fs, path, &ino, &inode);
if (rt) {
debugf("do_readinode(%s, &ino, &vnode); failed", path);
return rt;
}
tm = e2fs->now ? e2fs->now : time(NULL);
mask = S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX;
inode.i_mode = (inode.i_mode & ~mask) | (mode & mask);
inode.i_ctime = tm;
rt = do_writeinode(e2fs, ino, &inode);
if (rt) {
debugf("do_writeinode(e2fs, ino, &inode); failed");
return -EIO;
}
debugf("leave");
return 0;
}
int op_chown (const char *path, uid_t uid, gid_t gid)
{
int rt;
ext2_ino_t ino;
struct ext2_inode inode;
ext2_filsys e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s", path);
rt = do_check(path);
if (rt != 0) {
debugf("do_check(%s); failed", path);
return rt;
}
rt = do_readinode(e2fs, path, &ino, &inode);
if (rt) {
debugf("do_readinode(%s, &ino, &vnode); failed", path);
return rt;
}
if (uid != -1) {
ext2_write_uid(&inode, uid);
}
if (gid != -1) {
ext2_write_gid(&inode, gid);
}
rt = do_writeinode(e2fs, ino, &inode);
if (rt) {
debugf("do_writeinode(e2fs, ino, &inode); failed");
return -EIO;
}
debugf("leave");
return 0;
}
int op_truncate(const char *path, off_t length)
{
int rt;
ext2_file_t efile;
ext2_filsys e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s", path);
rt = do_check(path);
if (rt != 0) {
debugf("do_check(%s); failed", path);
return rt;
}
efile = do_open(e2fs, path, O_WRONLY);
if (efile == NULL) {
debugf("do_open(%s); failed", path);
return -ENOENT;
}
rt = ext2fs_file_set_size(efile, length);
if (rt) {
do_release(efile);
debugf("ext2fs_file_set_size(efile, %d); failed", length);
return rt;
}
rt = do_release(efile);
if (rt != 0) {
debugf("do_release(efile); failed");
return rt;
}
debugf("leave");
return 0;
}
int op_utimens (const char *path, const struct timespec tv[2])
{
int rt;
errcode_t rc;
ext2_ino_t ino;
struct ext2_vnode *vnode;
struct ext2_inode *inode;
ext2_filsys e2fs;
FUSE_EXT2_LOCK;
e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s", path);
rt = do_readvnode(e2fs, path, &ino, &vnode, DONT_OPEN_FILE);
if (rt) {
debugf("do_readvnode(%s, &ino, &vnode); failed", path);
FUSE_EXT2_UNLOCK;
return rt;
}
inode = vnode2inode(vnode);
inode->i_atime = tv[0].tv_sec;
inode->i_mtime = tv[0].tv_sec;
rc=vnode_put(vnode,1);
if (rc) {
debugf("vnode_put(vnode,1); failed");
FUSE_EXT2_UNLOCK;
return -EIO;
}
debugf("leave");
FUSE_EXT2_UNLOCK;
return 0;
}
int op_unlink (const char *path)
{
int rt;
errcode_t rc;
char *p_path;
char *r_path;
ext2_ino_t p_ino;
struct ext2_inode p_inode;
ext2_ino_t r_ino;
struct ext2_vnode *r_vnode;
struct ext2_inode *r_inode;
ext2_filsys e2fs;
FUSE_EXT2_LOCK;
e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s", path);
rt=do_check_split(path, &p_path, &r_path);
if (rt != 0) {
debugf("do_check_split: failed");
goto err;
}
debugf("parent: %s, child: %s", p_path, r_path);
rt = do_readinode(e2fs, p_path, &p_ino, &p_inode);
if (rt) {
debugf("do_readinode(%s, &p_ino, &p_inode); failed", p_path);
goto err_free_split;
}
rt = do_readvnode(e2fs, path, &r_ino, &r_vnode, DONT_OPEN_FILE);
if (rt) {
debugf("do_readvnode(%s, &r_ino, &r_vnode); failed", path);
goto err_free_split;
}
r_inode = vnode2inode(r_vnode);
if(LINUX_S_ISDIR(r_inode->i_mode)) {
debugf("%s is a directory", path);
vnode_put(r_vnode,0);
rt = -EISDIR;
goto err_free_split;
}
rc = ext2fs_unlink(e2fs, p_ino, r_path, r_ino, 0);
if (rc) {
debugf("ext2fs_unlink(e2fs, %d, %s, %d, 0); failed", p_ino, r_path, r_ino);
vnode_put(r_vnode,0);
rt = -EIO;
goto err_free_split;
}
if (r_inode->i_links_count > 0) {
r_inode->i_links_count -= 1;
}
p_inode.i_ctime = p_inode.i_mtime = e2fs->now ? e2fs->now : time(NULL);
rc = ext2fs_write_inode(e2fs, p_ino, &p_inode);
if (rc) {
debugf("ext2fs_write_inode(e2fs, p_ino, &p_inode); failed");
vnode_put(r_vnode,1);
rt = -EIO;
goto err_free_split;
}
r_inode->i_ctime = e2fs->now ? e2fs->now : time(NULL);
rc = vnode_put(r_vnode,1);
if (rc) {
debugf("vnode_put(r_vnode,1); failed");
rt = -EIO;
goto err_free_split;
}
free_split(p_path, r_path);
debugf("leave");
FUSE_EXT2_UNLOCK;
return 0;
err_free_split:
free_split(p_path, r_path);
err:
FUSE_EXT2_UNLOCK;
return rt;
}
int op_link (const char *source, const char *dest)
{
int rc;
char *p_path;
char *r_path;
ext2_ino_t ino;
ext2_ino_t d_ino;
struct ext2_vnode *vnode;
struct ext2_inode *inode;
struct ext2_inode d_inode;
ext2_filsys e2fs = current_ext2fs();
debugf("source: %s, dest: %s", source, dest);
rc = do_check(source);
if (rc != 0) {
debugf("do_check(%s); failed", source);
return rc;
}
rc = do_check_split(dest, &p_path, &r_path);
if (rc != 0) {
debugf("do_check(%s); failed", dest);
return rc;
}
debugf("parent: %s, child: %s", p_path, r_path);
rc = do_readinode(e2fs, p_path, &d_ino, &d_inode);
if (rc) {
debugf("do_readinode(%s, &ino, &inode); failed", p_path);
free_split(p_path, r_path);
return rc;
}
rc = do_readvnode(e2fs, source, &ino, &vnode);
if (rc) {
debugf("do_readvnode(%s, &ino, &vnode); failed", source);
free_split(p_path, r_path);
return rc;
}
inode = vnode2inode(vnode);
do {
debugf("calling ext2fs_link(e2fs, %d, %s, %d, %d);", d_ino, r_path, ino, do_modetoext2lag(inode->i_mode));
rc = ext2fs_link(e2fs, d_ino, r_path, ino, do_modetoext2lag(inode->i_mode));
if (rc == EXT2_ET_DIR_NO_SPACE) {
debugf("calling ext2fs_expand_dir(e2fs, &d)", d_ino);
if (ext2fs_expand_dir(e2fs, d_ino)) {
debugf("error while expanding directory %s (%d)", p_path, d_ino);
vnode_put(vnode, 0);
free_split(p_path, r_path);
return -ENOSPC;
}
}
} while (rc == EXT2_ET_DIR_NO_SPACE);
if (rc) {
debugf("ext2fs_link(e2fs, %d, %s, %d, %d); failed", d_ino, r_path, ino, do_modetoext2lag(inode->i_mode));
vnode_put(vnode, 0);
free_split(p_path, r_path);
return -EIO;
}
d_inode.i_mtime = d_inode.i_ctime = inode->i_ctime = e2fs->now ? e2fs->now : time(NULL);
inode->i_links_count += 1;
rc=vnode_put(vnode,1);
if (rc) {
debugf("vnode_put(vnode,1); failed");
free_split(p_path, r_path);
return -EIO;
}
rc = ext2fs_write_inode(e2fs, d_ino, &d_inode);
if (rc) {
debugf("ext2fs_write_inode(e2fs, d_ino, &d_inode); failed");
free_split(p_path, r_path);
return -EIO;
}
debugf("done");
return 0;
}
int op_readlink (const char *path, char *buf, size_t size)
{
int rt;
size_t s;
errcode_t rc;
ext2_ino_t ino;
char *b = NULL;
char *pathname;
struct ext2_inode inode;
ext2_filsys e2fs;
FUSE_EXT2_LOCK;
e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s", path);
rt = do_readinode(e2fs, path, &ino, &inode);
if (rt) {
debugf("do_readinode(%s, &ino, &inode); failed", path);
goto err;
}
if (!LINUX_S_ISLNK(inode.i_mode)) {
debugf("%s is not a link", path);
rt = -EINVAL;
goto err;
}
if (ext2fs_inode_data_blocks(e2fs, &inode)) {
rc = ext2fs_get_mem(EXT2_BLOCK_SIZE(e2fs->super), &b);
if (rc) {
debugf("ext2fs_get_mem(EXT2_BLOCK_SIZE(e2fs->super), &b); failed");
rt = -ENOMEM;
goto err;
}
rc = io_channel_read_blk(e2fs->io, inode.i_block[0], 1, b);
if (rc) {
ext2fs_free_mem(&b);
debugf("io_channel_read_blk(e2fs->io, inode.i_block[0], 1, b); failed");
rt = -EIO;
goto err;
}
pathname = b;
} else {
pathname = (char *) &(inode.i_block[0]);
}
debugf("pathname: %s", pathname);
s = (size < strlen(pathname) + 1) ? size : strlen(pathname) + 1;
snprintf(buf, s, "%s", pathname);
if (b) {
ext2fs_free_mem(&b);
}
debugf("leave");
FUSE_EXT2_UNLOCK;
return 0;
err:
FUSE_EXT2_UNLOCK;
return rt;
}
