#include <trace/events/erofs.h>
-/*
- * if inode is successfully read, return its inode page (or sometimes
- * the inode payload page if it's an extended inode) in order to fill
- * inline data if possible.
- */
static void *erofs_read_inode(struct erofs_buf *buf,
struct inode *inode, unsigned int *ofs)
{
extern const struct address_space_operations erofs_raw_access_aops;
extern const struct address_space_operations z_erofs_aops;
-/*
- * Logical to physical block mapping
- *
- * Different with other file systems, it is used for 2 access modes:
- *
- * 1) RAW access mode:
- *
- * Users pass a valid (m_lblk, m_lofs -- usually 0) pair,
- * and get the valid m_pblk, m_pofs and the longest m_len(in bytes).
- *
- * Note that m_lblk in the RAW access mode refers to the number of
- * the compressed ondisk block rather than the uncompressed
- * in-memory block for the compressed file.
- *
- * m_pofs equals to m_lofs except for the inline data page.
- *
- * 2) Normal access mode:
- *
- * If the inode is not compressed, it has no difference with
- * the RAW access mode. However, if the inode is compressed,
- * users should pass a valid (m_lblk, m_lofs) pair, and get
- * the needed m_pblk, m_pofs, m_len to get the compressed data
- * and the updated m_lblk, m_lofs which indicates the start
- * of the corresponding uncompressed data in the file.
- */
enum {
BH_Encoded = BH_PrivateStart,
BH_FullMapped,