node.h

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#ifndef _NODE_H_
#define _NODE_H_
 
#include "fsck.h"
 
static inline bool IS_INODE(struct f2fs_node *node)
{
    return F2FS_NODE_FOOTER(node)->nid == F2FS_NODE_FOOTER(node)->ino;
}
 
static inline unsigned int ADDRS_PER_PAGE(struct f2fs_sb_info *sbi,
        struct f2fs_node *node_blk, struct f2fs_node *inode_blk)
{
    nid_t ino = le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino);
    unsigned int nblocks;
 
    if (IS_INODE(node_blk))
        return ADDRS_PER_INODE(&node_blk->i);
 
    if (!inode_blk) {
        struct node_info ni;
 
        inode_blk = calloc(F2FS_BLKSIZE, 2);
        ASSERT(inode_blk);
 
        get_node_info(sbi, ino, &ni);
        ASSERT(dev_read_block(inode_blk, ni.blk_addr) >= 0);
        nblocks = ADDRS_PER_BLOCK(&inode_blk->i);
        free(inode_blk);
    } else {
        nblocks = ADDRS_PER_BLOCK(&inode_blk->i);
    }
    return nblocks;
}
 
static inline __le32 *blkaddr_in_inode(struct f2fs_node *node)
{
    return node->i.i_addr + get_extra_isize(node);
}
 
static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
{
    return IS_INODE(node) ? blkaddr_in_inode(node) : node->dn.addr;
}
 
static inline block_t datablock_addr(struct f2fs_node *node_page,
                    unsigned int offset)
{
    __le32 *addr_array;
 
    ASSERT(node_page);
    addr_array = blkaddr_in_node(node_page);
    return le32_to_cpu(addr_array[offset]);
}
 
static inline void set_nid(struct f2fs_node * rn, int off, nid_t nid, int i)
{
    if (i)
        F2FS_INODE_I_NID(&rn->i, off - NODE_DIR1_BLOCK) = cpu_to_le32(nid);
    else
        rn->in.nid[off] = cpu_to_le32(nid);
}
 
static inline nid_t get_nid(struct f2fs_node * rn, int off, int i)
{
    if (i)
        return le32_to_cpu(F2FS_INODE_I_NID(&rn->i, off - NODE_DIR1_BLOCK));
    else
        return le32_to_cpu(rn->in.nid[off]);
}
 
enum {
    ALLOC_NODE, /* allocate a new node page if needed */
    LOOKUP_NODE,    /* lookup up a node without readahead */
    LOOKUP_NODE_RA,
};
 
static inline void set_new_dnode(struct dnode_of_data *dn,
        struct f2fs_node *iblk, struct f2fs_node *nblk, nid_t nid)
{
    memset(dn, 0, sizeof(*dn));
    dn->inode_blk = iblk;
    dn->node_blk = nblk;
    dn->nid = nid;
    dn->idirty = 0;
    dn->ndirty = 0;
    dn->alloced = 0;
}
 
static inline void inc_inode_blocks(struct dnode_of_data *dn)
{
    u64 blocks = le64_to_cpu(dn->inode_blk->i.i_blocks);
 
    dn->inode_blk->i.i_blocks = cpu_to_le64(blocks + 1);
    dn->idirty = 1;
}
 
static inline int IS_DNODE(struct f2fs_node *node_page)
{
    unsigned int ofs = ofs_of_node(node_page);
 
    if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK ||
            ofs == 5 + 2 * NIDS_PER_BLOCK)
        return 0;
 
    if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
        ofs -= 6 + 2 * NIDS_PER_BLOCK;
        if (!((long int)ofs % (NIDS_PER_BLOCK + 1)))
            return 0;
    }
    return 1;
}
 
static inline nid_t ino_of_node(struct f2fs_node *node_blk)
{
    return le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino);
}
 
static inline __u64 cpver_of_node(struct f2fs_node *node_blk)
{
    return le64_to_cpu(F2FS_NODE_FOOTER(node_blk)->cp_ver);
}
 
static inline bool is_recoverable_dnode(struct f2fs_sb_info *sbi,
                        struct f2fs_node *node_blk)
{
    struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
    __u64 cp_ver = cur_cp_version(ckpt);
 
    /* Don't care crc part, if fsck.f2fs sets it. */
    if (is_set_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG))
        return (cp_ver << 32) == (cpver_of_node(node_blk) << 32);
 
    if (is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
        cp_ver |= (cur_cp_crc(ckpt) << 32);
 
    return cp_ver == cpver_of_node(node_blk);
}
 
static inline block_t next_blkaddr_of_node(struct f2fs_node *node_blk)
{
    return le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->next_blkaddr);
}
 
static inline int is_node(struct f2fs_node *node_blk, int type)
{
    return le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->flag) & (1 << type);
}
 
static inline void set_cold_node(struct f2fs_node *rn, bool is_dir)
{
    unsigned int flag = le32_to_cpu(F2FS_NODE_FOOTER(rn)->flag);
 
    if (is_dir)
        flag &= ~(0x1 << COLD_BIT_SHIFT);
    else
        flag |= (0x1 << COLD_BIT_SHIFT);
    F2FS_NODE_FOOTER(rn)->flag = cpu_to_le32(flag);
}
 
#define is_fsync_dnode(node_blk)    is_node(node_blk, FSYNC_BIT_SHIFT)
#define is_dent_dnode(node_blk)     is_node(node_blk, DENT_BIT_SHIFT)
 
#endif