int f2fs_create(struct f2fs_sb_info *sbi, struct dentry *de)
{
struct f2fs_node *parent, *child;
struct node_info ni;
struct f2fs_summary sum;
block_t blkaddr = NULL_ADDR;
int ret;
/* Find if there is a */
get_node_info(sbi, de->pino, &ni);
if (ni.blk_addr == NULL_ADDR) {
MSG(0, "No parent directory pino=%x\n", de->pino);
return -1;
}
parent = calloc(BLOCK_SZ, 1);
ASSERT(parent);
ret = dev_read_block(parent, ni.blk_addr);
ASSERT(ret >= 0);
/* Must convert inline dentry before the following opertions */
ret = convert_inline_dentry(sbi, parent, ni.blk_addr);
if (ret) {
MSG(0, "Convert inline dentry for pino=%x failed.\n", de->pino);
return -1;
}
ret = f2fs_find_entry(sbi, parent, de);
if (ret) {
MSG(0, "Skip the existing \"%s\" pino=%x ERR=%d\n",
de->name, de->pino, ret);
if (de->file_type == F2FS_FT_REG_FILE)
de->ino = 0;
goto free_parent_dir;
}
child = calloc(BLOCK_SZ, 1);
ASSERT(child);
f2fs_alloc_nid(sbi, &de->ino, 1);
init_inode_block(sbi, child, de);
ret = f2fs_add_link(sbi, parent, child->i.i_name,
le32_to_cpu(child->i.i_namelen),
le32_to_cpu(child->footer.ino),
map_de_type(le16_to_cpu(child->i.i_mode)),
ni.blk_addr, 1);
if (ret) {
MSG(0, "Skip the existing \"%s\" pino=%x ERR=%d\n",
de->name, de->pino, ret);
goto free_child_dir;
}
/* write child */
set_summary(&sum, de->ino, 0, ni.version);
reserve_new_block(sbi, &blkaddr, &sum, CURSEG_HOT_NODE);
/* update nat info */
update_nat_blkaddr(sbi, de->ino, de->ino, blkaddr);
ret = dev_write_block(child, blkaddr);
ASSERT(ret >= 0);
update_free_segments(sbi);
MSG(1, "Info: Create %s -> %s\n"
" -- ino=%x, type=%x, mode=%x, uid=%x, "
"gid=%x, cap=%"PRIx64", size=%lu, pino=%x\n",
de->full_path, de->path,
de->ino, de->file_type, de->mode,
de->uid, de->gid, de->capabilities, de->size, de->pino);
free_child_dir:
free(child);
free_parent_dir:
free(parent);
return 0;
}
void get_dnode_of_data(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
pgoff_t index, int mode)
{
int offset[4];
unsigned int noffset[4];
struct f2fs_node *parent = NULL;
nid_t nids[4];
block_t nblk[4];
struct node_info ni;
int level, i;
int ret;
level = get_node_path(index, offset, noffset);
nids[0] = dn->nid;
parent = dn->inode_blk;
if (level != 0)
nids[1] = get_nid(parent, offset[0], 1);
else
dn->node_blk = dn->inode_blk;
get_node_info(sbi, nids[0], &ni);
nblk[0] = ni.blk_addr;
for (i = 1; i <= level; i++) {
if (!nids[i] && mode == ALLOC_NODE) {
f2fs_alloc_nid(sbi, &nids[i], 0);
dn->nid = nids[i];
/* Function new_node_blk get a new f2fs_node blk and update*/
/* We should make sure that dn->node_blk == NULL*/
nblk[i] = new_node_block(sbi, dn, noffset[i]);
ASSERT(nblk[i]);
set_nid(parent, offset[i - 1], nids[i], i == 1);
} else {
/* If Sparse file no read API, */
struct node_info ni;
get_node_info(sbi, nids[i], &ni);
dn->node_blk = calloc(BLOCK_SZ, 1);
ASSERT(dn->node_blk);
ret = dev_read_block(dn->node_blk, ni.blk_addr);
ASSERT(ret >= 0);
nblk[i] = ni.blk_addr;
}
if (mode == ALLOC_NODE){
/* Parent node may have changed */
ret = dev_write_block(parent, nblk[i - 1]);
ASSERT(ret >= 0);
}
if (i != 1)
free(parent);
if (i < level) {
parent = dn->node_blk;
nids[i + 1] = get_nid(parent, offset[i], 0);
}
}
dn->nid = nids[level];
dn->ofs_in_node = offset[level];
dn->data_blkaddr = datablock_addr(dn->node_blk, dn->ofs_in_node);
dn->node_blkaddr = nblk[level];
}
