Esempio n. 1
0
/*
 * By the time this is called, we already have created
 * the directory cache entry for the new file, but it
 * is so far negative - it has no inode.
 *
 * If the create succeeds, we fill in the inode information
 * with d_instantiate(). 
 *
 * ext3301: modified to force regular files to start as immediate files.
 */
static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode, bool excl)
{
	struct inode *inode;

	dquot_initialize(dir);

	dbg_im(KERN_DEBUG "Creating file, mode %x\n", mode);
	if (MODE_TYPE(mode) == DT_REG) {
		mode = MODE_SET_IM(mode);
		dbg_im(KERN_DEBUG "- Mode changed (Reg->Im): %x\n", mode);
	}

	inode = ext2_new_inode(dir, mode, &dentry->d_name);
	if (IS_ERR(inode))
		return PTR_ERR(inode);

	inode->i_op = &ext2_file_inode_operations;
	if (ext2_use_xip(inode->i_sb)) {
		inode->i_mapping->a_ops = &ext2_aops_xip;
		inode->i_fop = &ext2_xip_file_operations;
	} else if (test_opt(inode->i_sb, NOBH)) {
		inode->i_mapping->a_ops = &ext2_nobh_aops;
		inode->i_fop = &ext2_file_operations;
	} else {
		inode->i_mapping->a_ops = &ext2_aops;
		inode->i_fop = &ext2_file_operations;
	}
	mark_inode_dirty(inode);
	return ext2_add_nondir(dentry, inode);
}
Esempio n. 2
0
/*
 * Allocate an inode in the file system.
 *
 * we leave the actual allocation strategy to the (modified)
 * ext2_new_inode(), to make sure we get the policies right
 */
int
ext2_valloc(struct vnode *pvp, int mode, struct ucred *cred, struct vnode **vpp)
{
	struct inode *pip;
	struct ext2_sb_info *fs;
	struct inode *ip;
	ino_t ino;
	int i, error;

	*vpp = NULL;
	pip = VTOI(pvp);
	fs = pip->i_e2fs;
	if (fs->s_es->s_free_inodes_count == 0)
		goto noinodes;

	/* call the Linux routine - it returns the inode number only */
	ino = ext2_new_inode(pip, mode);

	if (ino == 0)
		goto noinodes;
	error = VFS_VGET(pvp->v_mount, NULL, ino, vpp);
	if (error) {
		EXT2_VFREE(pvp, ino, mode);
		return (error);
	}
	ip = VTOI(*vpp);

	/*
	  the question is whether using VGET was such good idea at all -
	  Linux doesn't read the old inode in when it's allocating a
	  new one. I will set at least i_size & i_blocks the zero.
	*/
	ip->i_mode = 0;
	ip->i_size = 0;
	ip->i_blocks = 0;
	ip->i_flags = 0;
        /* now we want to make sure that the block pointers are zeroed out */
        for (i = 0; i < NDADDR; i++)
                ip->i_db[i] = 0;
        for (i = 0; i < NIADDR; i++)
                ip->i_ib[i] = 0;

	/*
	 * Set up a new generation number for this inode.
	 * XXX check if this makes sense in ext2
	 */
	if (ip->i_gen == 0 || ++ip->i_gen == 0)
		ip->i_gen = krandom() / 2 + 1;
/*
kprintf("ext2_valloc: allocated inode %d\n", ino);
*/
	return (0);
noinodes:
	ext2_fserr(fs, cred->cr_uid, "out of inodes");
	uprintf("\n%s: create/symlink failed, no inodes free\n", fs->fs_fsmnt);
	return (ENOSPC);
}
Esempio n. 3
0
/*
 * By the time this is called, we already have created
 * the directory cache entry for the new file, but it
 * is so far negative - it has no inode.
 *
 * If the create succeeds, we fill in the inode information
 * with d_instantiate(). 
 */
static int ext2_create (struct inode * dir, struct dentry * dentry, int mode, struct nameidata *nd)
{
	struct inode * inode = ext2_new_inode (dir, mode);
	int err = PTR_ERR(inode);
	if (!IS_ERR(inode)) {
		inode->i_op = &ext2_file_inode_operations;
		inode->i_fop = &ext2_file_operations;
		if (test_opt(inode->i_sb, NOBH))
			inode->i_mapping->a_ops = &ext2_nobh_aops;
		else
			inode->i_mapping->a_ops = &ext2_aops;
		mark_inode_dirty(inode);
		err = ext2_add_nondir(dentry, inode);
	}
	return err;
}
Esempio n. 4
0
static int ext2_symlink (struct inode * dir, struct dentry * dentry,
                         const char * symname)
{
    struct super_block * sb = dir->i_sb;
    int err = -ENAMETOOLONG;
    unsigned l = strlen(symname)+1;
    struct inode * inode;

    if (l > sb->s_blocksize)
        goto out;

    dquot_initialize(dir);

    inode = ext2_new_inode (dir, S_IFLNK | S_IRWXUGO, &dentry->d_name);
    err = PTR_ERR(inode);
    if (IS_ERR(inode))
        goto out;

    if (l > sizeof (EXT2_I(inode)->i_data)) {
        /* slow symlink */
        inode->i_op = &ext2_symlink_inode_operations;
        if (test_opt(inode->i_sb, NOBH))
            inode->i_mapping->a_ops = &ext2_nobh_aops;
        else
            inode->i_mapping->a_ops = &ext2_aops;
        err = page_symlink(inode, symname, l);
        if (err)
            goto out_fail;
    } else {
        /* fast symlink */
        inode->i_op = &ext2_fast_symlink_inode_operations;
        memcpy((char*)(EXT2_I(inode)->i_data),symname,l);
        inode->i_size = l-1;
    }
    mark_inode_dirty(inode);

    err = ext2_add_nondir(dentry, inode);
out:
    return err;

out_fail:
    inode_dec_link_count(inode);
    unlock_new_inode(inode);
    iput (inode);
    goto out;
}
Esempio n. 5
0
static int ext2_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
{
    struct inode * inode;
    int err;

    dquot_initialize(dir);

    inode_inc_link_count(dir);

    inode = ext2_new_inode(dir, S_IFDIR | mode, &dentry->d_name);
    err = PTR_ERR(inode);
    if (IS_ERR(inode))
        goto out_dir;

    inode->i_op = &ext2_dir_inode_operations;
    inode->i_fop = &ext2_dir_operations;
    if (test_opt(inode->i_sb, NOBH))
        inode->i_mapping->a_ops = &ext2_nobh_aops;
    else
        inode->i_mapping->a_ops = &ext2_aops;

    inode_inc_link_count(inode);

    err = ext2_make_empty(inode, dir);
    if (err)
        goto out_fail;

    err = ext2_add_link(dentry, inode);
    if (err)
        goto out_fail;

    unlock_new_inode(inode);
    d_instantiate(dentry, inode);
out:
    return err;

out_fail:
    inode_dec_link_count(inode);
    inode_dec_link_count(inode);
    unlock_new_inode(inode);
    iput(inode);
out_dir:
    inode_dec_link_count(dir);
    goto out;
}
Esempio n. 6
0
static int ext2_mkdir(struct inode * dir, struct dentry * dentry, int mode)
{
	struct inode * inode;
	int err = -EMLINK;

	if (dir->i_nlink >= EXT2_LINK_MAX)
		goto out;

	ext2_inc_count(dir);

	inode = ext2_new_inode (dir, S_IFDIR | mode);
	err = PTR_ERR(inode);
	if (IS_ERR(inode))
		goto out_dir;

	inode->i_op = &ext2_dir_inode_operations;
	inode->i_fop = &ext2_dir_operations;
	if (test_opt(inode->i_sb, NOBH))
		inode->i_mapping->a_ops = &ext2_nobh_aops;
	else
		inode->i_mapping->a_ops = &ext2_aops;

	ext2_inc_count(inode);

	err = ext2_make_empty(inode, dir);
	if (err)
		goto out_fail;

	err = ext2_add_link(dentry, inode);
	if (err)
		goto out_fail;

	d_instantiate(dentry, inode);
out:
	return err;

out_fail:
	ext2_dec_count(inode);
	ext2_dec_count(inode);
	iput(inode);
out_dir:
	ext2_dec_count(dir);
	goto out;
}
Esempio n. 7
0
static int ext2_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
{
    struct inode *inode = ext2_new_inode(dir, mode, NULL);
    if (IS_ERR(inode))
        return PTR_ERR(inode);

    inode->i_op = &ext2_file_inode_operations;
    if (test_opt(inode->i_sb, NOBH)) {
        inode->i_mapping->a_ops = &ext2_nobh_aops;
        inode->i_fop = &ext2_file_operations;
    } else {
        inode->i_mapping->a_ops = &ext2_aops;
        inode->i_fop = &ext2_file_operations;
    }
    mark_inode_dirty(inode);
    d_tmpfile(dentry, inode);
    unlock_new_inode(inode);
    return 0;
}
Esempio n. 8
0
File: open.c Progetto: Jimx-/lyos
/**
 * <Ring 1> Create a file.
 * @param p Ptr to the message.
 * @return  Zero on success.
 */
PUBLIC int ext2_create(MESSAGE * p)
{
    mode_t mode = (mode_t)(p->CRMODE);
    uid_t uid = (uid_t)(p->CRUID);
    gid_t gid = (gid_t)(p->CRGID);
    int src = p->source;

    dev_t dev = p->CRDEV;
    ino_t num = (ino_t)(p->CRINO);

    char pathname[EXT2_NAME_LEN + 1];
    int len = p->CRNAMELEN;

    /* error: name too long */
    if (len > EXT2_NAME_LEN + 1) {
        return ENAMETOOLONG;
    }

    data_copy(getpid(), D, pathname, src, D, p->CRPATHNAME, len);
    //phys_copy(va2pa(getpid(), &pathname), va2pa(src, p->CRPATHNAME), len);
    pathname[len] = '\0';

    ext2_inode_t * pin_dir = get_ext2_inode(dev, num);
    if (pin_dir == NULL) return ENOENT;

    ext2_inode_t * pin = ext2_new_inode(pin_dir, pathname, mode, 0, uid, gid);
    int retval = err_code;

    if (retval) {
        put_ext2_inode(pin);
        put_ext2_inode(pin_dir);
        return retval;
    } 

    p->CRINO = pin->i_num;
    p->CRMODE = pin->i_mode;
    p->CRFILESIZE = pin->i_size;
    p->CRUID = pin->i_uid;
    p->CRGID = pin->i_gid;

    put_ext2_inode(pin_dir);
    return 0;
}
Esempio n. 9
0
static int ext2_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_t rdev)
{
	struct inode * inode;
	int err;

	if (!new_valid_dev(rdev))
		return -EINVAL;

	inode = ext2_new_inode (dir, mode);
	err = PTR_ERR(inode);
	if (!IS_ERR(inode)) {
		init_special_inode(inode, inode->i_mode, rdev);
#ifdef CONFIG_EXT2_FS_XATTR
		inode->i_op = &ext2_special_inode_operations;
#endif
		mark_inode_dirty(inode);
		err = ext2_add_nondir(dentry, inode);
	}
	return err;
}
Esempio n. 10
0
/*
 * By the time this is called, we already have created
 * the directory cache entry for the new file, but it
 * is so far negative - it has no inode.
 *
 * If the create succeeds, we fill in the inode information
 * with d_instantiate().
 */
static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode, bool excl)
{
    struct inode *inode;

    dquot_initialize(dir);

    inode = ext2_new_inode(dir, mode, &dentry->d_name);
    if (IS_ERR(inode))
        return PTR_ERR(inode);

    inode->i_op = &ext2_file_inode_operations;
    if (test_opt(inode->i_sb, NOBH)) {
        inode->i_mapping->a_ops = &ext2_nobh_aops;
        inode->i_fop = &ext2_file_operations;
    } else {
        inode->i_mapping->a_ops = &ext2_aops;
        inode->i_fop = &ext2_file_operations;
    }
    mark_inode_dirty(inode);
    return ext2_add_nondir(dentry, inode);
}
Esempio n. 11
0
/*
 * By the time this is called, we already have created
 * the directory cache entry for the new file, but it
 * is so far negative - it has no inode.
 *
 * If the create succeeds, we fill in the inode information
 * with d_instantiate().
 */
static int ext2_create (struct inode * dir, struct dentry * dentry, int mode, struct nameidata *nd)
{
    ext2bp_debug("\nCreating inode for %s\n", dentry->d_name.name);
    struct inode * inode = ext2_new_inode (dir, mode);
    int err = PTR_ERR(inode);
    if (!IS_ERR(inode)) {
        inode->i_op = &ext2_file_inode_operations;
        if (ext2_use_xip(inode->i_sb)) {
            inode->i_mapping->a_ops = &ext2_aops_xip;
            inode->i_fop = &ext2_xip_file_operations;
        } else if (test_opt(inode->i_sb, NOBH)) {
            inode->i_mapping->a_ops = &ext2_nobh_aops;
            inode->i_fop = &ext2_file_operations;
        } else {
            inode->i_mapping->a_ops = &ext2_aops;
            inode->i_fop = &ext2_file_operations;
        }
        mark_inode_dirty(inode);
        err = ext2_add_nondir(dentry, inode);
    }
    return err;
}
Esempio n. 12
0
struct dentry *ext2_get_parent(struct dentry *child)
{
	struct qstr dotdot = {.name = "..", .len = 2};
	unsigned long ino = ext2_inode_by_name(child->d_inode, &dotdot);
	if (!ino)
		return ERR_PTR(-ENOENT);
	return d_obtain_alias(ext2_iget(child->d_inode->i_sb, ino));
} 

/*
 * By the time this is called, we already have created
 * the directory cache entry for the new file, but it
 * is so far negative - it has no inode.
 *
 * If the create succeeds, we fill in the inode information
 * with d_instantiate(). 
 */
static int ext2_create (struct inode * dir, struct dentry * dentry, int mode, struct nameidata *nd)
{
	struct inode *inode;

	dquot_initialize(dir);

	inode = ext2_new_inode(dir, mode);
	if (IS_ERR(inode))
		return PTR_ERR(inode);

	inode->i_op = &ext2_file_inode_operations;
	if (ext2_use_xip(inode->i_sb)) {
		inode->i_mapping->a_ops = &ext2_aops_xip;
		inode->i_fop = &ext2_xip_file_operations;
	} else if (test_opt(inode->i_sb, NOBH)) {
		inode->i_mapping->a_ops = &ext2_nobh_aops;
		inode->i_fop = &ext2_file_operations;
	} else {
		inode->i_mapping->a_ops = &ext2_aops;
		inode->i_fop = &ext2_file_operations;
	}
	mark_inode_dirty(inode);
	return ext2_add_nondir(dentry, inode);
}

static int ext2_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_t rdev)
{
	struct inode * inode;
	int err;

	if (!new_valid_dev(rdev))
		return -EINVAL;

	dquot_initialize(dir);

	inode = ext2_new_inode (dir, mode);
	err = PTR_ERR(inode);
	if (!IS_ERR(inode)) {
		init_special_inode(inode, inode->i_mode, rdev);
#ifdef CONFIG_EXT2_FS_XATTR
		inode->i_op = &ext2_special_inode_operations;
#endif
		mark_inode_dirty(inode);
		err = ext2_add_nondir(dentry, inode);
	}
	return err;
}

static int ext2_symlink (struct inode * dir, struct dentry * dentry,
	const char * symname)
{
	struct super_block * sb = dir->i_sb;
	int err = -ENAMETOOLONG;
	unsigned l = strlen(symname)+1;
	struct inode * inode;

	if (l > sb->s_blocksize)
		goto out;

	dquot_initialize(dir);

	inode = ext2_new_inode (dir, S_IFLNK | S_IRWXUGO);
	err = PTR_ERR(inode);
	if (IS_ERR(inode))
		goto out;

	if (l > sizeof (EXT2_I(inode)->i_data)) {
		/* slow symlink */
		inode->i_op = &ext2_symlink_inode_operations;
		if (test_opt(inode->i_sb, NOBH))
			inode->i_mapping->a_ops = &ext2_nobh_aops;
		else
			inode->i_mapping->a_ops = &ext2_aops;
		err = page_symlink(inode, symname, l);
		if (err)
			goto out_fail;
	} else {
		/* fast symlink */
		inode->i_op = &ext2_fast_symlink_inode_operations;
		memcpy((char*)(EXT2_I(inode)->i_data),symname,l);
		inode->i_size = l-1;
	}
	mark_inode_dirty(inode);

	err = ext2_add_nondir(dentry, inode);
out:
	return err;

out_fail:
	inode_dec_link_count(inode);
	unlock_new_inode(inode);
	iput (inode);
	goto out;
}

static int ext2_link (struct dentry * old_dentry, struct inode * dir,
	struct dentry *dentry)
{
	struct inode *inode = old_dentry->d_inode;
	int err;

	if (inode->i_nlink >= EXT2_LINK_MAX)
		return -EMLINK;

	dquot_initialize(dir);

	inode->i_ctime = CURRENT_TIME_SEC;
	inode_inc_link_count(inode);
	ihold(inode);

	err = ext2_add_link(dentry, inode);
	if (!err) {
		d_instantiate(dentry, inode);
		return 0;
	}
	inode_dec_link_count(inode);
	iput(inode);
	return err;
}

static int ext2_mkdir(struct inode * dir, struct dentry * dentry, int mode)
{
	struct inode * inode;
	int err = -EMLINK;

	if (dir->i_nlink >= EXT2_LINK_MAX)
		goto out;

	dquot_initialize(dir);

	inode_inc_link_count(dir);

	inode = ext2_new_inode (dir, S_IFDIR | mode);
	err = PTR_ERR(inode);
	if (IS_ERR(inode))
		goto out_dir;

	inode->i_op = &ext2_dir_inode_operations;
	inode->i_fop = &ext2_dir_operations;
	if (test_opt(inode->i_sb, NOBH))
		inode->i_mapping->a_ops = &ext2_nobh_aops;
	else
		inode->i_mapping->a_ops = &ext2_aops;

	inode_inc_link_count(inode);

	err = ext2_make_empty(inode, dir);
	if (err)
		goto out_fail;

	err = ext2_add_link(dentry, inode);
	if (err)
		goto out_fail;

	d_instantiate(dentry, inode);
	unlock_new_inode(inode);
out:
	return err;

out_fail:
	inode_dec_link_count(inode);
	inode_dec_link_count(inode);
	unlock_new_inode(inode);
	iput(inode);
out_dir:
	inode_dec_link_count(dir);
	goto out;
}

static int ext2_unlink(struct inode * dir, struct dentry *dentry)
{
	struct inode * inode = dentry->d_inode;
	struct ext2_dir_entry_2 * de;
	struct page * page;
	int err = -ENOENT;

	dquot_initialize(dir);

	de = ext2_find_entry (dir, &dentry->d_name, &page);
	if (!de)
		goto out;

	err = ext2_delete_entry (de, page);
	if (err)
		goto out;

	inode->i_ctime = dir->i_ctime;
	inode_dec_link_count(inode);
	err = 0;
out:
	return err;
}

static int ext2_rmdir (struct inode * dir, struct dentry *dentry)
{
	struct inode * inode = dentry->d_inode;
	int err = -ENOTEMPTY;

	if (ext2_empty_dir(inode)) {
		err = ext2_unlink(dir, dentry);
		if (!err) {
			inode->i_size = 0;
			inode_dec_link_count(inode);
			inode_dec_link_count(dir);
		}
	}
	return err;
}

static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry,
	struct inode * new_dir,	struct dentry * new_dentry )
{
	struct inode * old_inode = old_dentry->d_inode;
	struct inode * new_inode = new_dentry->d_inode;
	struct page * dir_page = NULL;
	struct ext2_dir_entry_2 * dir_de = NULL;
	struct page * old_page;
	struct ext2_dir_entry_2 * old_de;
	int err = -ENOENT;

	dquot_initialize(old_dir);
	dquot_initialize(new_dir);

	old_de = ext2_find_entry (old_dir, &old_dentry->d_name, &old_page);
	if (!old_de)
		goto out;

	if (S_ISDIR(old_inode->i_mode)) {
		err = -EIO;
		dir_de = ext2_dotdot(old_inode, &dir_page);
		if (!dir_de)
			goto out_old;
	}

	if (new_inode) {
		struct page *new_page;
		struct ext2_dir_entry_2 *new_de;

		err = -ENOTEMPTY;
		if (dir_de && !ext2_empty_dir (new_inode))
			goto out_dir;

		err = -ENOENT;
		new_de = ext2_find_entry (new_dir, &new_dentry->d_name, &new_page);
		if (!new_de)
			goto out_dir;
		ext2_set_link(new_dir, new_de, new_page, old_inode, 1);
		new_inode->i_ctime = CURRENT_TIME_SEC;
		if (dir_de)
			drop_nlink(new_inode);
		inode_dec_link_count(new_inode);
	} else {
		if (dir_de) {
			err = -EMLINK;
			if (new_dir->i_nlink >= EXT2_LINK_MAX)
				goto out_dir;
		}
		err = ext2_add_link(new_dentry, old_inode);
		if (err)
			goto out_dir;
		if (dir_de)
			inode_inc_link_count(new_dir);
	}

	/*
	 * Like most other Unix systems, set the ctime for inodes on a
 	 * rename.
	 */
	old_inode->i_ctime = CURRENT_TIME_SEC;
	mark_inode_dirty(old_inode);

	ext2_delete_entry (old_de, old_page);

	if (dir_de) {
		if (old_dir != new_dir)
			ext2_set_link(old_inode, dir_de, dir_page, new_dir, 0);
		else {
			kunmap(dir_page);
			page_cache_release(dir_page);
		}
		inode_dec_link_count(old_dir);
	}
	return 0;


out_dir:
	if (dir_de) {
		kunmap(dir_page);
		page_cache_release(dir_page);
	}
out_old:
	kunmap(old_page);
	page_cache_release(old_page);
out:
	return err;
}

const struct inode_operations ext2_dir_inode_operations = {
	.create		= ext2_create,
	.lookup		= ext2_lookup,
	.link		= ext2_link,
	.unlink		= ext2_unlink,
	.symlink	= ext2_symlink,
	.mkdir		= ext2_mkdir,
	.rmdir		= ext2_rmdir,
	.mknod		= ext2_mknod,
	.rename		= ext2_rename,
#ifdef CONFIG_EXT2_FS_XATTR
	.setxattr	= generic_setxattr,
	.getxattr	= generic_getxattr,
	.listxattr	= ext2_listxattr,
	.removexattr	= generic_removexattr,
#endif
	.setattr	= ext2_setattr,
	.check_acl	= ext2_check_acl,
};

const struct inode_operations ext2_special_inode_operations = {
#ifdef CONFIG_EXT2_FS_XATTR
	.setxattr	= generic_setxattr,
	.getxattr	= generic_getxattr,
	.listxattr	= ext2_listxattr,
	.removexattr	= generic_removexattr,
#endif
	.setattr	= ext2_setattr,
	.check_acl	= ext2_check_acl,
};