Example #1
0
// FIXME: This seems like real cruft. Wouldn't it be better just to do the
// right thing?
static void icache_evict(struct _inode *root_i, struct _inode *i)
{
	struct _inode *this = root_i, *next;

 restart:
	D2(printf("icache_evict\n"));
	// If this is an absolute search path from the root,
	// remove all cached inodes with i_count of zero (these are only 
	// held where needed for dotdot filepaths)
	while (this) {
		next = this->i_cache_next;
		if (this != i && this->i_count == 0) {
			struct _inode *parent = this->i_parent;
			if (this->i_cache_next)
				this->i_cache_next->i_cache_prev = this->i_cache_prev;
			if (this->i_cache_prev)
				this->i_cache_prev->i_cache_next = this->i_cache_next;
			jffs2_clear_inode(this);
			memset(this, 0x5a, sizeof(*this));
			free(this);
			if (parent && parent != this) {
				parent->i_count--;
				this = root_i;
				goto restart;
			}
		}
		this = next;
	}
}
Example #2
0
static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode)
{
	struct jffs2_raw_inode *ri;
	struct jffs2_inode_info *f, *dir_f;
	struct jffs2_sb_info *c;
	struct inode *inode;
	int ret;

	ri = jffs2_alloc_raw_inode();
	if (!ri)
		return -ENOMEM;
	
	c = JFFS2_SB_INFO(dir_i->i_sb);

	D1(printk(KERN_DEBUG "jffs2_create()\n"));

	inode = jffs2_new_inode(dir_i, mode, ri);

	if (IS_ERR(inode)) {
		D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
		jffs2_free_raw_inode(ri);
		return PTR_ERR(inode);
	}

	inode->i_op = &jffs2_file_inode_operations;
	inode->i_fop = &jffs2_file_operations;
	inode->i_mapping->a_ops = &jffs2_file_address_operations;
	inode->i_mapping->nrpages = 0;

	f = JFFS2_INODE_INFO(inode);
	dir_f = JFFS2_INODE_INFO(dir_i);

	ret = jffs2_do_create(c, dir_f, f, ri, 
			      dentry->d_name.name, dentry->d_name.len);

	if (ret) {
		jffs2_clear_inode(inode);
		make_bad_inode(inode);
		iput(inode);
		jffs2_free_raw_inode(ri);
		return ret;
	}

	dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime));

	jffs2_free_raw_inode(ri);
	d_instantiate(dentry, inode);

	D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
		  inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
	return 0;
}
Example #3
0
int jffs2_create(struct inode *dir_i, struct qstr *d_name, int mode,
                 struct inode **new_i)
{
    struct jffs2_raw_inode *ri;
    struct jffs2_inode_info *f, *dir_f;
    struct jffs2_sb_info *c;
    struct inode *inode;
    int ret;

    ri = jffs2_alloc_raw_inode();
    if (!ri)
        return -ENOMEM;

    c = JFFS2_SB_INFO(dir_i->i_sb);

    D1(printk(KERN_DEBUG "jffs2_create()\n"));

    inode = jffs2_new_inode(dir_i, mode, ri);

    if (IS_ERR(inode)) {
        D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
        jffs2_free_raw_inode(ri);
        return PTR_ERR(inode);
    }

    f = JFFS2_INODE_INFO(inode);
    dir_f = JFFS2_INODE_INFO(dir_i);

    ret = jffs2_do_create(c, dir_f, f, ri,
                          d_name->name, d_name->len);

    if (ret) {
        jffs2_clear_inode(inode);
        make_bad_inode(inode);
        iput(inode);
        jffs2_free_raw_inode(ri);
        return ret;
    }

    jffs2_free_raw_inode(ri);

    D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d)\n",
              inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink));
    *new_i = inode;
    return 0;
}
Example #4
0
int jffs2_mkdir (struct inode *dir_i, struct qstr *d_name, int mode, struct inode **new_i)
{
    struct jffs2_inode_info *f, *dir_f;
    struct jffs2_sb_info *c;
    struct inode *inode;
    struct jffs2_raw_inode *ri;
    struct jffs2_raw_dirent *rd;
    struct jffs2_full_dnode *fn;
    struct jffs2_full_dirent *fd;
    int namelen;
    uint32_t alloclen, phys_ofs;
    uint32_t writtenlen;
    int ret;

    mode |= S_IFDIR;

    ri = jffs2_alloc_raw_inode();
    if (!ri)
        return -ENOMEM;

    c = JFFS2_SB_INFO(dir_i->i_sb);

    /* Try to reserve enough space for both node and dirent.
     * Just the node will do for now, though
     */
    namelen = d_name->len;
    ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL);

    if (ret) {
        jffs2_free_raw_inode(ri);
        return ret;
    }

    inode = jffs2_new_inode(dir_i, mode, ri);

    if (IS_ERR(inode)) {
        jffs2_free_raw_inode(ri);
        jffs2_complete_reservation(c);
        return PTR_ERR(inode);
    }

    f = JFFS2_INODE_INFO(inode);

    ri->data_crc = 0;
    ri->node_crc = crc32(0, ri, sizeof(*ri)-8);

    fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, &writtenlen);

    jffs2_free_raw_inode(ri);

    if (IS_ERR(fn)) {
        /* Eeek. Wave bye bye */
        up(&f->sem);
        jffs2_complete_reservation(c);
        jffs2_clear_inode(inode);
        return PTR_ERR(fn);
    }
    /* No data here. Only a metadata node, which will be
       obsoleted by the first data write
    */
    f->metadata = fn;
    up(&f->sem);

    /* Work out where to put the dirent node now. */
    writtenlen = PAD(writtenlen);
    phys_ofs += writtenlen;
    alloclen -= writtenlen;

    if (alloclen < sizeof(*rd)+namelen) {
        /* Not enough space left in this chunk. Get some more */
        jffs2_complete_reservation(c);
        ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
        if (ret) {
            /* Eep. */
            jffs2_clear_inode(inode);
            return ret;
        }
    }

    rd = jffs2_alloc_raw_dirent();
    if (!rd) {
        /* Argh. Now we treat it like a normal delete */
        jffs2_complete_reservation(c);
        jffs2_clear_inode(inode);
        return -ENOMEM;
    }

    dir_f = JFFS2_INODE_INFO(dir_i);
    down(&dir_f->sem);

    rd->magic = JFFS2_MAGIC_BITMASK;
    rd->nodetype = JFFS2_NODETYPE_DIRENT;
    rd->totlen = sizeof(*rd) + namelen;
    rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);

    rd->pino = dir_i->i_ino;
    rd->version = ++dir_f->highest_version;
    rd->ino = inode->i_ino;
    rd->mctime = CURRENT_TIME;
    rd->nsize = namelen;
    rd->type = DT_DIR;
    rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
    rd->name_crc = crc32(0, d_name->name, namelen);

    fd = jffs2_write_dirent(c, dir_f, rd, d_name->name, namelen, phys_ofs, &writtenlen);

    jffs2_complete_reservation(c);
    jffs2_free_raw_dirent(rd);

    if (IS_ERR(fd)) {
        /* dirent failed to write. Delete the inode normally
           as if it were the final unlink() */
        up(&dir_f->sem);
        jffs2_clear_inode(inode);
        return PTR_ERR(fd);
    }

    /* Link the fd into the inode's list, obsoleting an old
       one if necessary. */
    jffs2_add_fd_to_list(c, fd, &dir_f->dents);
    up(&dir_f->sem);

    *new_i = inode;
    return 0;
}
Example #5
0
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
{
	struct jffs2_inode_info *f, *dir_f;
	struct jffs2_sb_info *c;
	struct inode *inode;
	struct jffs2_raw_inode *ri;
	struct jffs2_raw_dirent *rd;
	struct jffs2_full_dnode *fn;
	struct jffs2_full_dirent *fd;
	int namelen;
	union jffs2_device_node dev;
	int devlen = 0;
	uint32_t alloclen;
	int ret;

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

	ri = jffs2_alloc_raw_inode();
	if (!ri)
		return -ENOMEM;

	c = JFFS2_SB_INFO(dir_i->i_sb);

	if (S_ISBLK(mode) || S_ISCHR(mode))
		devlen = jffs2_encode_dev(&dev, rdev);

	/* Try to reserve enough space for both node and dirent.
	 * Just the node will do for now, though
	 */
	namelen = dentry->d_name.len;
	ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen,
				  ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);

	if (ret) {
		jffs2_free_raw_inode(ri);
		return ret;
	}

	inode = jffs2_new_inode(dir_i, mode, ri);

	if (IS_ERR(inode)) {
		jffs2_free_raw_inode(ri);
		jffs2_complete_reservation(c);
		return PTR_ERR(inode);
	}
	inode->i_op = &jffs2_file_inode_operations;
	init_special_inode(inode, inode->i_mode, rdev);

	f = JFFS2_INODE_INFO(inode);

	ri->dsize = ri->csize = cpu_to_je32(devlen);
	ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
	ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));

	ri->compr = JFFS2_COMPR_NONE;
	ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
	ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));

	fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL);

	jffs2_free_raw_inode(ri);

	if (IS_ERR(fn)) {
		/* Eeek. Wave bye bye */
		mutex_unlock(&f->sem);
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return PTR_ERR(fn);
	}
	/* No data here. Only a metadata node, which will be
	   obsoleted by the first data write
	*/
	f->metadata = fn;
	mutex_unlock(&f->sem);

	jffs2_complete_reservation(c);

	ret = jffs2_init_security(inode, dir_i);
	if (ret) {
		jffs2_clear_inode(inode);
		return ret;
	}
	ret = jffs2_init_acl_post(inode);
	if (ret) {
		jffs2_clear_inode(inode);
		return ret;
	}

	ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
				  ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
	if (ret) {
		/* Eep. */
		jffs2_clear_inode(inode);
		return ret;
	}

	rd = jffs2_alloc_raw_dirent();
	if (!rd) {
		/* Argh. Now we treat it like a normal delete */
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return -ENOMEM;
	}

	dir_f = JFFS2_INODE_INFO(dir_i);
	mutex_lock(&dir_f->sem);

	rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
	rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
	rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
	rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));

	rd->pino = cpu_to_je32(dir_i->i_ino);
	rd->version = cpu_to_je32(++dir_f->highest_version);
	rd->ino = cpu_to_je32(inode->i_ino);
	rd->mctime = cpu_to_je32(get_seconds());
	rd->nsize = namelen;

	/* XXX: This is ugly. */
	rd->type = (mode & S_IFMT) >> 12;

	rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
	rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));

	fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);

	if (IS_ERR(fd)) {
		/* dirent failed to write. Delete the inode normally
		   as if it were the final unlink() */
		jffs2_complete_reservation(c);
		jffs2_free_raw_dirent(rd);
		mutex_unlock(&dir_f->sem);
		jffs2_clear_inode(inode);
		return PTR_ERR(fd);
	}

	dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));

	jffs2_free_raw_dirent(rd);

	/* Link the fd into the inode's list, obsoleting an old
	   one if necessary. */
	jffs2_add_fd_to_list(c, fd, &dir_f->dents);

	mutex_unlock(&dir_f->sem);
	jffs2_complete_reservation(c);

	d_instantiate(dentry, inode);

	return 0;
}
Example #6
0
static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
{
	struct jffs2_inode_info *f, *dir_f;
	struct jffs2_sb_info *c;
	struct inode *inode;
	struct jffs2_raw_inode *ri;
	struct jffs2_raw_dirent *rd;
	struct jffs2_full_dnode *fn;
	struct jffs2_full_dirent *fd;
	int namelen;
	uint32_t alloclen;
	int ret;

	mode |= S_IFDIR;

	ri = jffs2_alloc_raw_inode();
	if (!ri)
		return -ENOMEM;

	c = JFFS2_SB_INFO(dir_i->i_sb);

	/* Try to reserve enough space for both node and dirent.
	 * Just the node will do for now, though
	 */
	namelen = dentry->d_name.len;
	ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
				  JFFS2_SUMMARY_INODE_SIZE);

	if (ret) {
		jffs2_free_raw_inode(ri);
		return ret;
	}

	inode = jffs2_new_inode(dir_i, mode, ri);

	if (IS_ERR(inode)) {
		jffs2_free_raw_inode(ri);
		jffs2_complete_reservation(c);
		return PTR_ERR(inode);
	}

	inode->i_op = &jffs2_dir_inode_operations;
	inode->i_fop = &jffs2_dir_operations;

	f = JFFS2_INODE_INFO(inode);

	/* Directories get nlink 2 at start */
	inode->i_nlink = 2;
	/* but ic->pino_nlink is the parent ino# */
	f->inocache->pino_nlink = dir_i->i_ino;

	ri->data_crc = cpu_to_je32(0);
	ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));

	fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL);

	jffs2_free_raw_inode(ri);

	if (IS_ERR(fn)) {
		/* Eeek. Wave bye bye */
		mutex_unlock(&f->sem);
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return PTR_ERR(fn);
	}
	/* No data here. Only a metadata node, which will be
	   obsoleted by the first data write
	*/
	f->metadata = fn;
	mutex_unlock(&f->sem);

	jffs2_complete_reservation(c);

	ret = jffs2_init_security(inode, dir_i);
	if (ret) {
		jffs2_clear_inode(inode);
		return ret;
	}
	ret = jffs2_init_acl_post(inode);
	if (ret) {
		jffs2_clear_inode(inode);
		return ret;
	}

	ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
				  ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
	if (ret) {
		/* Eep. */
		jffs2_clear_inode(inode);
		return ret;
	}

	rd = jffs2_alloc_raw_dirent();
	if (!rd) {
		/* Argh. Now we treat it like a normal delete */
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return -ENOMEM;
	}

	dir_f = JFFS2_INODE_INFO(dir_i);
	mutex_lock(&dir_f->sem);

	rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
	rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
	rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
	rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));

	rd->pino = cpu_to_je32(dir_i->i_ino);
	rd->version = cpu_to_je32(++dir_f->highest_version);
	rd->ino = cpu_to_je32(inode->i_ino);
	rd->mctime = cpu_to_je32(get_seconds());
	rd->nsize = namelen;
	rd->type = DT_DIR;
	rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
	rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));

	fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);

	if (IS_ERR(fd)) {
		/* dirent failed to write. Delete the inode normally
		   as if it were the final unlink() */
		jffs2_complete_reservation(c);
		jffs2_free_raw_dirent(rd);
		mutex_unlock(&dir_f->sem);
		jffs2_clear_inode(inode);
		return PTR_ERR(fd);
	}

	dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
	inc_nlink(dir_i);

	jffs2_free_raw_dirent(rd);

	/* Link the fd into the inode's list, obsoleting an old
	   one if necessary. */
	jffs2_add_fd_to_list(c, fd, &dir_f->dents);

	mutex_unlock(&dir_f->sem);
	jffs2_complete_reservation(c);

	d_instantiate(dentry, inode);
	return 0;
}
Example #7
0
static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
{
	struct jffs2_inode_info *f, *dir_f;
	struct jffs2_sb_info *c;
	struct inode *inode;
	struct jffs2_raw_inode *ri;
	struct jffs2_raw_dirent *rd;
	struct jffs2_full_dnode *fn;
	struct jffs2_full_dirent *fd;
	int namelen;
	uint32_t alloclen;
	int ret, targetlen = strlen(target);

	/* FIXME: If you care. We'd need to use frags for the target
	   if it grows much more than this */
	if (targetlen > 254)
		return -ENAMETOOLONG;

	ri = jffs2_alloc_raw_inode();

	if (!ri)
		return -ENOMEM;

	c = JFFS2_SB_INFO(dir_i->i_sb);

	/* Try to reserve enough space for both node and dirent.
	 * Just the node will do for now, though
	 */
	namelen = dentry->d_name.len;
	ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen,
				  ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);

	if (ret) {
		jffs2_free_raw_inode(ri);
		return ret;
	}

	inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);

	if (IS_ERR(inode)) {
		jffs2_free_raw_inode(ri);
		jffs2_complete_reservation(c);
		return PTR_ERR(inode);
	}

	inode->i_op = &jffs2_symlink_inode_operations;

	f = JFFS2_INODE_INFO(inode);

	inode->i_size = targetlen;
	ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
	ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
	ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));

	ri->compr = JFFS2_COMPR_NONE;
	ri->data_crc = cpu_to_je32(crc32(0, target, targetlen));
	ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));

	fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL);

	jffs2_free_raw_inode(ri);

	if (IS_ERR(fn)) {
		/* Eeek. Wave bye bye */
		mutex_unlock(&f->sem);
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return PTR_ERR(fn);
	}

	/* We use f->target field to store the target path. */
	f->target = kmalloc(targetlen + 1, GFP_KERNEL);
	if (!f->target) {
		printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
		mutex_unlock(&f->sem);
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return -ENOMEM;
	}

	memcpy(f->target, target, targetlen + 1);
	D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));

	/* No data here. Only a metadata node, which will be
	   obsoleted by the first data write
	*/
	f->metadata = fn;
	mutex_unlock(&f->sem);

	jffs2_complete_reservation(c);

	ret = jffs2_init_security(inode, dir_i);
	if (ret) {
		jffs2_clear_inode(inode);
		return ret;
	}
	ret = jffs2_init_acl_post(inode);
	if (ret) {
		jffs2_clear_inode(inode);
		return ret;
	}

	ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
				  ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
	if (ret) {
		/* Eep. */
		jffs2_clear_inode(inode);
		return ret;
	}

	rd = jffs2_alloc_raw_dirent();
	if (!rd) {
		/* Argh. Now we treat it like a normal delete */
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return -ENOMEM;
	}

	dir_f = JFFS2_INODE_INFO(dir_i);
	mutex_lock(&dir_f->sem);

	rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
	rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
	rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
	rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));

	rd->pino = cpu_to_je32(dir_i->i_ino);
	rd->version = cpu_to_je32(++dir_f->highest_version);
	rd->ino = cpu_to_je32(inode->i_ino);
	rd->mctime = cpu_to_je32(get_seconds());
	rd->nsize = namelen;
	rd->type = DT_LNK;
	rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
	rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));

	fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);

	if (IS_ERR(fd)) {
		/* dirent failed to write. Delete the inode normally
		   as if it were the final unlink() */
		jffs2_complete_reservation(c);
		jffs2_free_raw_dirent(rd);
		mutex_unlock(&dir_f->sem);
		jffs2_clear_inode(inode);
		return PTR_ERR(fd);
	}

	dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));

	jffs2_free_raw_dirent(rd);

	/* Link the fd into the inode's list, obsoleting an old
	   one if necessary. */
	jffs2_add_fd_to_list(c, fd, &dir_f->dents);

	mutex_unlock(&dir_f->sem);
	jffs2_complete_reservation(c);

	d_instantiate(dentry, inode);
	return 0;
}
Example #8
0
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, int rdev)
{
	struct jffs2_inode_info *f, *dir_f;
	struct jffs2_sb_info *c;
	struct inode *inode;
	struct jffs2_raw_inode *ri;
	struct jffs2_raw_dirent *rd;
	struct jffs2_full_dnode *fn;
	struct jffs2_full_dirent *fd;
	int namelen;
	unsigned short dev;
	int devlen = 0;
	__u32 alloclen, phys_ofs;
	__u32 writtenlen;
	int ret;

	ri = jffs2_alloc_raw_inode();
	if (!ri)
		return -ENOMEM;
	
	c = JFFS2_SB_INFO(dir_i->i_sb);
	
	if (S_ISBLK(mode) || S_ISCHR(mode)) {
		dev = (MAJOR(to_kdev_t(rdev)) << 8) | MINOR(to_kdev_t(rdev));
		devlen = sizeof(dev);
	}
	
	/* Try to reserve enough space for both node and dirent. 
	 * Just the node will do for now, though 
	 */
	namelen = dentry->d_name.len;
	ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &phys_ofs, &alloclen, ALLOC_NORMAL);

	if (ret) {
		jffs2_free_raw_inode(ri);
		return ret;
	}

	inode = jffs2_new_inode(dir_i, mode, ri);

	if (IS_ERR(inode)) {
		jffs2_free_raw_inode(ri);
		jffs2_complete_reservation(c);
		return PTR_ERR(inode);
	}
	inode->i_op = &jffs2_file_inode_operations;
	init_special_inode(inode, inode->i_mode, rdev);

	f = JFFS2_INODE_INFO(inode);

	ri->dsize = ri->csize = devlen;
	ri->totlen = sizeof(*ri) + ri->csize;
	ri->hdr_crc = crc32(0, ri, sizeof(struct jffs2_unknown_node)-4);

	ri->compr = JFFS2_COMPR_NONE;
	ri->data_crc = crc32(0, &dev, devlen);
	ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
	
	fn = jffs2_write_dnode(inode, ri, (char *)&dev, devlen, phys_ofs, &writtenlen);

	jffs2_free_raw_inode(ri);

	if (IS_ERR(fn)) {
		/* Eeek. Wave bye bye */
		up(&f->sem);
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return PTR_ERR(fn);
	}
	/* No data here. Only a metadata node, which will be 
	   obsoleted by the first data write
	*/
	f->metadata = fn;
	up(&f->sem);

	/* Work out where to put the dirent node now. */
	writtenlen = (writtenlen+3)&~3;
	phys_ofs += writtenlen;
	alloclen -= writtenlen;

	if (alloclen < sizeof(*rd)+namelen) {
		/* Not enough space left in this chunk. Get some more */
		jffs2_complete_reservation(c);
		ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
		if (ret) {
			/* Eep. */
			jffs2_clear_inode(inode);
			return ret;
		}
	}

	rd = jffs2_alloc_raw_dirent();
	if (!rd) {
		/* Argh. Now we treat it like a normal delete */
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return -ENOMEM;
	}

	dir_f = JFFS2_INODE_INFO(dir_i);
	down(&dir_f->sem);

	rd->magic = JFFS2_MAGIC_BITMASK;
	rd->nodetype = JFFS2_NODETYPE_DIRENT;
	rd->totlen = sizeof(*rd) + namelen;
	rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);

	rd->pino = dir_i->i_ino;
	rd->version = ++dir_f->highest_version;
	rd->ino = inode->i_ino;
	rd->mctime = CURRENT_TIME;
	rd->nsize = namelen;

	/* XXX: This is ugly. */
	rd->type = (mode & S_IFMT) >> 12;

	rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
	rd->name_crc = crc32(0, dentry->d_name.name, namelen);

	fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen);
	
	jffs2_complete_reservation(c);
	
	if (IS_ERR(fd)) {
		/* dirent failed to write. Delete the inode normally 
		   as if it were the final unlink() */
		jffs2_free_raw_dirent(rd);
		up(&dir_f->sem);
		jffs2_clear_inode(inode);
		return PTR_ERR(fd);
	}

	dir_i->i_mtime = dir_i->i_ctime = rd->mctime;

	jffs2_free_raw_dirent(rd);

	/* Link the fd into the inode's list, obsoleting an old
	   one if necessary. */
	jffs2_add_fd_to_list(c, fd, &dir_f->dents);
	up(&dir_f->sem);

	d_instantiate(dentry, inode);

	return 0;
}
Example #9
0
static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
{
	struct jffs2_inode_info *f, *dir_f;
	struct jffs2_sb_info *c;
	struct inode *inode;
	struct jffs2_raw_inode *ri;
	struct jffs2_raw_dirent *rd;
	struct jffs2_full_dnode *fn;
	struct jffs2_full_dirent *fd;
	int namelen;
	__u32 alloclen, phys_ofs;
	__u32 writtenlen;
	int ret;

	/* FIXME: If you care. We'd need to use frags for the target
	   if it grows much more than this */
	if (strlen(target) > 254)
		return -EINVAL;

	ri = jffs2_alloc_raw_inode();

	if (!ri)
		return -ENOMEM;
	
	c = JFFS2_SB_INFO(dir_i->i_sb);
	
	/* Try to reserve enough space for both node and dirent. 
	 * Just the node will do for now, though 
	 */
	namelen = dentry->d_name.len;
	ret = jffs2_reserve_space(c, sizeof(*ri) + strlen(target), &phys_ofs, &alloclen, ALLOC_NORMAL);

	if (ret) {
		jffs2_free_raw_inode(ri);
		return ret;
	}

	inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);

	if (IS_ERR(inode)) {
		jffs2_free_raw_inode(ri);
		jffs2_complete_reservation(c);
		return PTR_ERR(inode);
	}

	inode->i_op = &jffs2_symlink_inode_operations;

	f = JFFS2_INODE_INFO(inode);

	inode->i_size = ri->isize = ri->dsize = ri->csize = strlen(target);
	ri->totlen = sizeof(*ri) + ri->dsize;
	ri->hdr_crc = crc32(0, ri, sizeof(struct jffs2_unknown_node)-4);

	ri->compr = JFFS2_COMPR_NONE;
	ri->data_crc = crc32(0, target, strlen(target));
	ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
	
	fn = jffs2_write_dnode(inode, ri, target, strlen(target), phys_ofs, &writtenlen);

	jffs2_free_raw_inode(ri);

	if (IS_ERR(fn)) {
		/* Eeek. Wave bye bye */
		up(&f->sem);
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return PTR_ERR(fn);
	}
	/* No data here. Only a metadata node, which will be 
	   obsoleted by the first data write
	*/
	f->metadata = fn;
	up(&f->sem);

	/* Work out where to put the dirent node now. */
	writtenlen = (writtenlen+3)&~3;
	phys_ofs += writtenlen;
	alloclen -= writtenlen;

	if (alloclen < sizeof(*rd)+namelen) {
		/* Not enough space left in this chunk. Get some more */
		jffs2_complete_reservation(c);
		ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
		if (ret) {
			/* Eep. */
			jffs2_clear_inode(inode);
			return ret;
		}
	}

	rd = jffs2_alloc_raw_dirent();
	if (!rd) {
		/* Argh. Now we treat it like a normal delete */
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return -ENOMEM;
	}

	dir_f = JFFS2_INODE_INFO(dir_i);
	down(&dir_f->sem);

	rd->magic = JFFS2_MAGIC_BITMASK;
	rd->nodetype = JFFS2_NODETYPE_DIRENT;
	rd->totlen = sizeof(*rd) + namelen;
	rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);

	rd->pino = dir_i->i_ino;
	rd->version = ++dir_f->highest_version;
	rd->ino = inode->i_ino;
	rd->mctime = CURRENT_TIME;
	rd->nsize = namelen;
	rd->type = DT_LNK;
	rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
	rd->name_crc = crc32(0, dentry->d_name.name, namelen);

	fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen);
	
	jffs2_complete_reservation(c);
	
	if (IS_ERR(fd)) {
		/* dirent failed to write. Delete the inode normally 
		   as if it were the final unlink() */
		jffs2_free_raw_dirent(rd);
		up(&dir_f->sem);
		jffs2_clear_inode(inode);
		return PTR_ERR(fd);
	}

	dir_i->i_mtime = dir_i->i_ctime = rd->mctime;

	jffs2_free_raw_dirent(rd);

	/* Link the fd into the inode's list, obsoleting an old
	   one if necessary. */
	jffs2_add_fd_to_list(c, fd, &dir_f->dents);
	up(&dir_f->sem);

	d_instantiate(dentry, inode);
	return 0;
}
Example #10
0
static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode)
{
	struct jffs2_inode_info *f, *dir_f;
	struct jffs2_sb_info *c;
	struct inode *inode;
	struct jffs2_raw_inode *ri;
	struct jffs2_raw_dirent *rd;
	struct jffs2_full_dnode *fn;
	struct jffs2_full_dirent *fd;
	int namelen;
	__u32 alloclen, phys_ofs;
	__u32 writtenlen;
	int ret;

	ri = jffs2_alloc_raw_inode();
	if (!ri)
		return -ENOMEM;
	
	c = JFFS2_SB_INFO(dir_i->i_sb);

	D1(printk(KERN_DEBUG "jffs2_create()\n"));

	/* Try to reserve enough space for both node and dirent. 
	 * Just the node will do for now, though 
	 */
	namelen = dentry->d_name.len;
	ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL);
	D1(printk(KERN_DEBUG "jffs2_create(): reserved 0x%x bytes\n", alloclen));
	if (ret) {
		jffs2_free_raw_inode(ri);
		return ret;
	}

	inode = jffs2_new_inode(dir_i, mode, ri);

	if (IS_ERR(inode)) {
		D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
		jffs2_free_raw_inode(ri);
		jffs2_complete_reservation(c);
		return PTR_ERR(inode);
	}

	inode->i_op = &jffs2_file_inode_operations;
	inode->i_fop = &jffs2_file_operations;
	inode->i_mapping->a_ops = &jffs2_file_address_operations;
	inode->i_mapping->nrpages = 0;

	f = JFFS2_INODE_INFO(inode);

	ri->data_crc = 0;
	ri->node_crc = crc32(0, ri, sizeof(*ri)-8);

	fn = jffs2_write_dnode(inode, ri, NULL, 0, phys_ofs, &writtenlen);
	D1(printk(KERN_DEBUG "jffs2_create created file with mode 0x%x\n", ri->mode));
	jffs2_free_raw_inode(ri);

	if (IS_ERR(fn)) {
		D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n"));
		/* Eeek. Wave bye bye */
		up(&f->sem);
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return PTR_ERR(fn);
	}
	/* No data here. Only a metadata node, which will be 
	   obsoleted by the first data write
	*/
	f->metadata = fn;

	/* Work out where to put the dirent node now. */
	writtenlen = PAD(writtenlen);
	phys_ofs += writtenlen;
	alloclen -= writtenlen;
	up(&f->sem);

	if (alloclen < sizeof(*rd)+namelen) {
		/* Not enough space left in this chunk. Get some more */
		jffs2_complete_reservation(c);
		ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
		
		if (ret) {
			/* Eep. */
			D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n"));
			jffs2_clear_inode(inode);
			return ret;
		}
	}

	rd = jffs2_alloc_raw_dirent();
	if (!rd) {
		/* Argh. Now we treat it like a normal delete */
		jffs2_complete_reservation(c);
		jffs2_clear_inode(inode);
		return -ENOMEM;
	}

	dir_f = JFFS2_INODE_INFO(dir_i);
	down(&dir_f->sem);

	rd->magic = JFFS2_MAGIC_BITMASK;
	rd->nodetype = JFFS2_NODETYPE_DIRENT;
	rd->totlen = sizeof(*rd) + namelen;
	rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);

	rd->pino = dir_i->i_ino;
	rd->version = ++dir_f->highest_version;
	rd->ino = inode->i_ino;
	rd->mctime = CURRENT_TIME;
	rd->nsize = namelen;
	rd->type = DT_REG;
	rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
	rd->name_crc = crc32(0, dentry->d_name.name, namelen);

	fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen);

	jffs2_complete_reservation(c);
	
	if (IS_ERR(fd)) {
		/* dirent failed to write. Delete the inode normally 
		   as if it were the final unlink() */
		jffs2_free_raw_dirent(rd);
		up(&dir_f->sem);
		jffs2_clear_inode(inode);
		return PTR_ERR(fd);
	}

	dir_i->i_mtime = dir_i->i_ctime = rd->mctime;

	jffs2_free_raw_dirent(rd);

	/* Link the fd into the inode's list, obsoleting an old
	   one if necessary. */
	jffs2_add_fd_to_list(c, fd, &dir_f->dents);
	up(&dir_f->sem);

	d_instantiate(dentry, inode);

	D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
		  inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
	return 0;
}