static int
sfs_dirent_link_nolock(struct sfs_fs *sfs, struct sfs_inode *sin, int slot, struct sfs_inode *lnksin, const char *name) {
int ret;
if ((ret = sfs_dirent_write_nolock(sfs, sin, slot, lnksin->ino, name)) != 0) {
return ret;
}
sin->dirty = 1;
sin->din->dirinfo.slots ++;
lnksin->dirty = 1;
lnksin->din->nlinks ++;
return 0;
}
static int
sfs_dirent_unlink_nolock(struct sfs_fs *sfs, struct sfs_inode *sin, int slot, struct sfs_inode *lnksin) {
int ret;
if ((ret = sfs_dirent_write_nolock(sfs, sin, slot, 0, NULL)) != 0) {
return ret;
}
assert(sin->din->dirinfo.slots != 0 && lnksin->din->nlinks != 0);
sin->dirty = 1;
sin->din->dirinfo.slots --;
lnksin->dirty = 1;
lnksin->din->nlinks --;
return 0;
}
static int
sfs_rename1_nolock(struct sfs_fs *sfs, struct sfs_inode *sin, const char *name, const char *new_name) {
if (strcmp(name, new_name) == 0) {
return 0;
}
int ret, slot;
uint32_t ino;
if ((ret = sfs_dirent_search_nolock(sfs, sin, name, &ino, &slot, NULL)) != 0) {
return ret;
}
if ((ret = sfs_dirent_search_nolock(sfs, sin, new_name, NULL, NULL, NULL)) != -E_NOENT) {
return (ret != 0) ? ret : -E_EXISTS;
}
return sfs_dirent_write_nolock(sfs, sin, slot, ino, new_name);
}
static int
sfs_create(struct inode *node, const char *name, bool excl, struct inode **node_store) {
// kprintf("ready to create a file\n");
if (strlen(name) > SFS_MAX_FNAME_LEN) {
return -1;
}
// sfs_create_inode(struct sfs_fs *sfs, struct sfs_disk_inode *din, uint32_t ino, struct inode **node_store)
struct sfs_fs *sfs = fsop_info(vop_fs(node), sfs);
struct sfs_inode *sin = vop_info(node, sfs_inode);
int ret;
// sfs_create_inode(struct sfs_fs *sfs, struct sfs_disk_inode *din, uint32_t ino, struct inode **node_store)
struct inode *node_tmp = NULL;
int empty_slot = -1;
lock_sfs_fs(sfs);
// sfs_block_alloc(struct sfs_fs *sfs, uint32_t *ino_store)
sfs_dirent_search_nolock(sfs, sin, name, node_tmp, NULL, &empty_slot);
// kprintf("%s\n", __func__);
if (node_tmp) {
node_store = node_tmp;
} else {
if (empty_slot < 0) {
kprintf("no slot\n");
return -1;
}
struct sfs_disk_inode *din = alloc_disk_inode(SFS_TYPE_FILE);
int ino;
sfs_block_alloc(sfs, &ino);
// kprintf("%s\n", __func__);
// if (sfs_block_inuse(sfs, ino)) {
// kprintf("be sure use\n");
// } else {
// kprintf("not used\n");
// }
sfs_create_inode(sfs, din, ino, &node_tmp);
++ (din->__nlinks__);
sfs_set_links(sfs, vop_info(node_tmp, sfs_inode));
// kprintf("0x%08x\n", node_tmp);
// sfs_namefile(struct inode *node, struct iobuf *iob)
// sfs_dirent_write_nolock(struct sfs_fs *sfs, struct sfs_inode *sin, int slot, uint32_t ino, const char *name)
sfs_dirent_write_nolock(sfs, sin, empty_slot, ino, name);
// ++ sin->din->blocks;
int secno = ram2block(ino);
swapper_block_changed(secno);
swapper_block_late_sync(secno);
// kprintf("sin->ino is %d\n", sin->ino);
sin->dirty = 1;
lock_sin(sin);
{
if (sin->dirty) {
sin->dirty = 0;
if ((ret = sfs_wbuf(sfs, sin->din, sizeof(struct sfs_disk_inode), sin->ino, 0)) != 0) {
sin->dirty = 1;
}
}
}
unlock_sin(sin);
secno = ram2block(sin->ino);
swapper_block_changed(secno);
swapper_block_late_sync(secno);
vop_info(node_tmp, sfs_inode)->dirty = 1;
sfs->super_dirty = 1;
// if ((ret = sfs_bmap_load_nolock(sfs, sin, slot, &ino)) != 0) {
// return ret;
// }
// assert(sfs_block_inuse(sfs, ino));
// kprintf("ino is %d\n", ino);
// kprintf("empty slot is %d\n", empty_slot);
// kprintf("father ino is %d\n", sin->ino);
*node_store = node_tmp;
}
unlock_sfs_fs(sfs);
// sfs_create_inode(sfs, struct sfs_disk_inode *din, uint32_t ino, struct inode **node_store)
return 0;
}
