// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *   Copyright (C) International Business Machines Corp., 2000-2004
 */

#include <linux/fs.h>
#include <linux/quotaops.h>
#include "jfs_incore.h"
#include "jfs_inode.h"
#include "jfs_filsys.h"
#include "jfs_imap.h"
#include "jfs_dinode.h"
#include "jfs_debug.h"


void jfs_set_inode_flags(struct inode *inode)
{
        unsigned int flags = JFS_IP(inode)->mode2;
        unsigned int new_fl = 0;

        if (flags & JFS_IMMUTABLE_FL)
                new_fl |= S_IMMUTABLE;
        if (flags & JFS_APPEND_FL)
                new_fl |= S_APPEND;
        if (flags & JFS_NOATIME_FL)
                new_fl |= S_NOATIME;
        if (flags & JFS_DIRSYNC_FL)
                new_fl |= S_DIRSYNC;
        if (flags & JFS_SYNC_FL)
                new_fl |= S_SYNC;
        inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND | S_NOATIME |
                        S_DIRSYNC | S_SYNC);
}

/*
 * NAME:        ialloc()
 *
 * FUNCTION:    Allocate a new inode
 *
 */
struct inode *ialloc(struct inode *parent, umode_t mode)
{
        struct super_block *sb = parent->i_sb;
        struct inode *inode;
        struct jfs_inode_info *jfs_inode;
        int rc;

        inode = new_inode(sb);
        if (!inode) {
                jfs_warn("ialloc: new_inode returned NULL!");
                return ERR_PTR(-ENOMEM);
        }

        jfs_inode = JFS_IP(inode);

        rc = diAlloc(parent, S_ISDIR(mode), inode);
        if (rc) {
                jfs_warn("ialloc: diAlloc returned %d!", rc);
                goto fail_put;
        }

        if (insert_inode_locked(inode) < 0) {
                rc = -EINVAL;
                goto fail_put;
        }

        inode_init_owner(&nop_mnt_idmap, inode, parent, mode);
        /*
         * New inodes need to save sane values on disk when
         * uid & gid mount options are used
         */
        jfs_inode->saved_uid = inode->i_uid;
        jfs_inode->saved_gid = inode->i_gid;

        /*
         * Allocate inode to quota.
         */
        rc = dquot_initialize(inode);
        if (rc)
                goto fail_drop;
        rc = dquot_alloc_inode(inode);
        if (rc)
                goto fail_drop;

        /* inherit flags from parent */
        jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;

        if (S_ISDIR(mode)) {
                jfs_inode->mode2 |= IDIRECTORY;
                jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
        }
        else {
                jfs_inode->mode2 |= INLINEEA | ISPARSE;
                if (S_ISLNK(mode))
                        jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
        }
        jfs_inode->mode2 |= inode->i_mode;

        inode->i_blocks = 0;
        simple_inode_init_ts(inode);
        jfs_inode->otime = inode_get_ctime_sec(inode);
        inode->i_generation = JFS_SBI(sb)->gengen++;

        jfs_inode->cflag = 0;

        /* Zero remaining fields */
        memset(&jfs_inode->acl, 0, sizeof(dxd_t));
        memset(&jfs_inode->ea, 0, sizeof(dxd_t));
        jfs_inode->next_index = 0;
        jfs_inode->acltype = 0;
        jfs_inode->btorder = 0;
        jfs_inode->btindex = 0;
        jfs_inode->bxflag = 0;
        jfs_inode->blid = 0;
        jfs_inode->atlhead = 0;
        jfs_inode->atltail = 0;
        jfs_inode->xtlid = 0;
        jfs_set_inode_flags(inode);

        jfs_info("ialloc returns inode = 0x%p", inode);

        return inode;

fail_drop:
        dquot_drop(inode);
        inode->i_flags |= S_NOQUOTA;
        clear_nlink(inode);
        discard_new_inode(inode);
        return ERR_PTR(rc);

fail_put:
        iput(inode);
        return ERR_PTR(rc);
}