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_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 do_create (ext2_filsys e2fs, const char *path, mode_t mode, dev_t dev, const char *fastsymlink)
{
int rt;
time_t tm;
errcode_t rc;
char *p_path;
char *r_path;
ext2_ino_t ino;
struct ext2_inode inode;
ext2_ino_t n_ino;
struct fuse_context *ctx;
debugf("enter");
debugf("path = %s, mode: 0%o", path, mode);
rt=do_check_split(path, &p_path, &r_path);
debugf("parent: %s, child: %s", p_path, r_path);
rt = do_readinode(e2fs, p_path, &ino, &inode);
if (rt) {
debugf("do_readinode(%s, &ino, &inode); failed", p_path);
free_split(p_path, r_path);
return rt;
}
rc = ext2fs_new_inode(e2fs, ino, mode, 0, &n_ino);
if (rc) {
debugf("ext2fs_new_inode(ep.fs, ino, mode, 0, &n_ino); failed");
return -ENOMEM;
}
do {
debugf("calling ext2fs_link(e2fs, %d, %s, %d, %d);", ino, r_path, n_ino, do_modetoext2lag(mode));
rc = ext2fs_link(e2fs, ino, r_path, n_ino, do_modetoext2lag(mode));
if (rc == EXT2_ET_DIR_NO_SPACE) {
debugf("calling ext2fs_expand_dir(e2fs, &d)", ino);
if (ext2fs_expand_dir(e2fs, ino)) {
debugf("error while expanding directory %s (%d)", p_path, ino);
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", ino, r_path, n_ino, do_modetoext2lag(mode));
free_split(p_path, r_path);
return -EIO;
}
if (ext2fs_test_inode_bitmap(e2fs->inode_map, n_ino)) {
debugf("inode already set");
}
ext2fs_inode_alloc_stats2(e2fs, n_ino, +1, 0);
memset(&inode, 0, sizeof(inode));
tm = e2fs->now ? e2fs->now : time(NULL);
inode.i_mode = mode;
inode.i_atime = inode.i_ctime = inode.i_mtime = tm;
inode.i_links_count = 1;
inode.i_size = 0;
ctx = fuse_get_context();
if (ctx) {
inode.i_uid = ctx->uid;
inode.i_gid = ctx->gid;
}
if (S_ISCHR(mode) || S_ISBLK(mode)) {
if (old_valid_dev(dev))
inode.i_block[0]= ext2fs_cpu_to_le32(old_encode_dev(dev));
else
inode.i_block[1]= ext2fs_cpu_to_le32(new_encode_dev(dev));
}
if (S_ISLNK(mode) && fastsymlink != NULL) {
inode.i_size = strlen(fastsymlink);
strncpy((char *)&(inode.i_block[0]),fastsymlink,
(EXT2_N_BLOCKS * sizeof(inode.i_block[0])));
}
rc = ext2fs_write_new_inode(e2fs, n_ino, &inode);
if (rc) {
debugf("ext2fs_write_new_inode(e2fs, n_ino, &inode);");
free_split(p_path, r_path);
return -EIO;
}
/* update parent dir */
rt = do_readinode(e2fs, p_path, &ino, &inode);
if (rt) {
debugf("do_readinode(%s, &ino, &inode); dailed", p_path);
free_split(p_path, r_path);
return -EIO;
}
inode.i_ctime = inode.i_mtime = tm;
rc = ext2fs_write_inode(e2fs, ino, &inode);
if (rc) {
debugf("ext2fs_write_inode(e2fs, ino, &inode); failed");
free_split(p_path, r_path);
return -EIO;
}
free_split(p_path, r_path);
debugf("leave");
return 0;
}
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;
}
