Esempi in C++ (Cpp) per jffs2_read_inode_range

Esempio n. 1

File: file.c Progetto: Antonio-Zhou/Linux-2.6.11

int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg)
{
	struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
	struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
	unsigned char *pg_buf;
	int ret;

	D2(printk(KERN_DEBUG "jffs2_do_readpage_nolock(): ino #%lu, page at offset 0x%lx\n", inode->i_ino, pg->index << PAGE_CACHE_SHIFT));

	if (!PageLocked(pg))
                PAGE_BUG(pg);

	pg_buf = kmap(pg);
	/* FIXME: Can kmap fail? */

	ret = jffs2_read_inode_range(c, f, pg_buf, pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);

	if (ret) {
		ClearPageUptodate(pg);
		SetPageError(pg);
	} else {
		SetPageUptodate(pg);
		ClearPageError(pg);
	}

	flush_dcache_page(pg);
	kunmap(pg);

	D2(printk(KERN_DEBUG "readpage finished\n"));
	return 0;
}

Esempio n. 2

File: file.c Progetto: AshishNamdev/linux

static int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg)
{
	struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
	struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
	unsigned char *pg_buf;
	int ret;

	jffs2_dbg(2, "%s(): ino #%lu, page at offset 0x%lx\n",
		  __func__, inode->i_ino, pg->index << PAGE_SHIFT);

	BUG_ON(!PageLocked(pg));

	pg_buf = kmap(pg);
	/* FIXME: Can kmap fail? */

	ret = jffs2_read_inode_range(c, f, pg_buf, pg->index << PAGE_SHIFT,
				     PAGE_SIZE);

	if (ret) {
		ClearPageUptodate(pg);
		SetPageError(pg);
	} else {
		SetPageUptodate(pg);
		ClearPageError(pg);
	}

	flush_dcache_page(pg);
	kunmap(pg);

	jffs2_dbg(2, "readpage finished\n");
	return ret;
}

Esempio n. 3

File: file.c Progetto: rrowicki/Chrono_Kernel-1

static int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg)
{
	struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
	struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
	unsigned char *pg_buf;
	int ret;

;

	BUG_ON(!PageLocked(pg));

	pg_buf = kmap(pg);
	/* FIXME: Can kmap fail? */

	ret = jffs2_read_inode_range(c, f, pg_buf, pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);

	if (ret) {
		ClearPageUptodate(pg);
		SetPageError(pg);
	} else {
		SetPageUptodate(pg);
		ClearPageError(pg);
	}

	flush_dcache_page(pg);
	kunmap(pg);

;
	return ret;
}

Esempio n. 4

File: fs-rtems.c Progetto: coredmp95/rtems-raspberry

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;
	}
}