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![Zheng Yongjun](/assets/img/avatar_default.png)
Fix some spelling mistakes in comments: withoug ==> without numer ==> number aswell ==> as well referes ==> refers childs ==> children unnecesarry ==> unnecessary Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com> Reviewed-by: Alexander Dahl <ada@thorsis.com> Signed-off-by: Richard Weinberger <richard@nod.at>
1873 lines
52 KiB
C
1873 lines
52 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* This file is part of UBIFS.
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*
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* Copyright (C) 2006-2008 Nokia Corporation.
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*
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* Authors: Artem Bityutskiy (Битюцкий Артём)
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* Adrian Hunter
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*/
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/*
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* This file implements UBIFS journal.
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*
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* The journal consists of 2 parts - the log and bud LEBs. The log has fixed
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* length and position, while a bud logical eraseblock is any LEB in the main
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* area. Buds contain file system data - data nodes, inode nodes, etc. The log
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* contains only references to buds and some other stuff like commit
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* start node. The idea is that when we commit the journal, we do
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* not copy the data, the buds just become indexed. Since after the commit the
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* nodes in bud eraseblocks become leaf nodes of the file system index tree, we
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* use term "bud". Analogy is obvious, bud eraseblocks contain nodes which will
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* become leafs in the future.
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*
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* The journal is multi-headed because we want to write data to the journal as
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* optimally as possible. It is nice to have nodes belonging to the same inode
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* in one LEB, so we may write data owned by different inodes to different
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* journal heads, although at present only one data head is used.
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*
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* For recovery reasons, the base head contains all inode nodes, all directory
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* entry nodes and all truncate nodes. This means that the other heads contain
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* only data nodes.
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*
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* Bud LEBs may be half-indexed. For example, if the bud was not full at the
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* time of commit, the bud is retained to continue to be used in the journal,
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* even though the "front" of the LEB is now indexed. In that case, the log
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* reference contains the offset where the bud starts for the purposes of the
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* journal.
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*
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* The journal size has to be limited, because the larger is the journal, the
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* longer it takes to mount UBIFS (scanning the journal) and the more memory it
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* takes (indexing in the TNC).
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*
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* All the journal write operations like 'ubifs_jnl_update()' here, which write
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* multiple UBIFS nodes to the journal at one go, are atomic with respect to
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* unclean reboots. Should the unclean reboot happen, the recovery code drops
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* all the nodes.
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*/
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#include "ubifs.h"
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/**
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* zero_ino_node_unused - zero out unused fields of an on-flash inode node.
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* @ino: the inode to zero out
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*/
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static inline void zero_ino_node_unused(struct ubifs_ino_node *ino)
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{
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memset(ino->padding1, 0, 4);
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memset(ino->padding2, 0, 26);
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}
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/**
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* zero_dent_node_unused - zero out unused fields of an on-flash directory
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* entry node.
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* @dent: the directory entry to zero out
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*/
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static inline void zero_dent_node_unused(struct ubifs_dent_node *dent)
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{
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dent->padding1 = 0;
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}
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/**
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* zero_trun_node_unused - zero out unused fields of an on-flash truncation
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* node.
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* @trun: the truncation node to zero out
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*/
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static inline void zero_trun_node_unused(struct ubifs_trun_node *trun)
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{
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memset(trun->padding, 0, 12);
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}
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static void ubifs_add_auth_dirt(struct ubifs_info *c, int lnum)
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{
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if (ubifs_authenticated(c))
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ubifs_add_dirt(c, lnum, ubifs_auth_node_sz(c));
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}
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/**
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* reserve_space - reserve space in the journal.
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* @c: UBIFS file-system description object
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* @jhead: journal head number
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* @len: node length
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*
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* This function reserves space in journal head @head. If the reservation
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* succeeded, the journal head stays locked and later has to be unlocked using
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* 'release_head()'. Returns zero in case of success, %-EAGAIN if commit has to
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* be done, and other negative error codes in case of other failures.
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*/
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static int reserve_space(struct ubifs_info *c, int jhead, int len)
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{
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int err = 0, err1, retries = 0, avail, lnum, offs, squeeze;
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struct ubifs_wbuf *wbuf = &c->jheads[jhead].wbuf;
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/*
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* Typically, the base head has smaller nodes written to it, so it is
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* better to try to allocate space at the ends of eraseblocks. This is
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* what the squeeze parameter does.
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*/
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ubifs_assert(c, !c->ro_media && !c->ro_mount);
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squeeze = (jhead == BASEHD);
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again:
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mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
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if (c->ro_error) {
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err = -EROFS;
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goto out_unlock;
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}
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avail = c->leb_size - wbuf->offs - wbuf->used;
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if (wbuf->lnum != -1 && avail >= len)
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return 0;
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/*
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* Write buffer wasn't seek'ed or there is no enough space - look for an
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* LEB with some empty space.
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*/
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lnum = ubifs_find_free_space(c, len, &offs, squeeze);
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if (lnum >= 0)
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goto out;
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err = lnum;
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if (err != -ENOSPC)
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goto out_unlock;
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/*
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* No free space, we have to run garbage collector to make
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* some. But the write-buffer mutex has to be unlocked because
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* GC also takes it.
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*/
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dbg_jnl("no free space in jhead %s, run GC", dbg_jhead(jhead));
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mutex_unlock(&wbuf->io_mutex);
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lnum = ubifs_garbage_collect(c, 0);
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if (lnum < 0) {
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err = lnum;
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if (err != -ENOSPC)
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return err;
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/*
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* GC could not make a free LEB. But someone else may
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* have allocated new bud for this journal head,
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* because we dropped @wbuf->io_mutex, so try once
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* again.
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*/
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dbg_jnl("GC couldn't make a free LEB for jhead %s",
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dbg_jhead(jhead));
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if (retries++ < 2) {
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dbg_jnl("retry (%d)", retries);
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goto again;
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}
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dbg_jnl("return -ENOSPC");
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return err;
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}
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mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
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dbg_jnl("got LEB %d for jhead %s", lnum, dbg_jhead(jhead));
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avail = c->leb_size - wbuf->offs - wbuf->used;
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if (wbuf->lnum != -1 && avail >= len) {
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/*
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* Someone else has switched the journal head and we have
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* enough space now. This happens when more than one process is
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* trying to write to the same journal head at the same time.
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*/
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dbg_jnl("return LEB %d back, already have LEB %d:%d",
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lnum, wbuf->lnum, wbuf->offs + wbuf->used);
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err = ubifs_return_leb(c, lnum);
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if (err)
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goto out_unlock;
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return 0;
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}
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offs = 0;
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out:
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/*
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* Make sure we synchronize the write-buffer before we add the new bud
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* to the log. Otherwise we may have a power cut after the log
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* reference node for the last bud (@lnum) is written but before the
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* write-buffer data are written to the next-to-last bud
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* (@wbuf->lnum). And the effect would be that the recovery would see
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* that there is corruption in the next-to-last bud.
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*/
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err = ubifs_wbuf_sync_nolock(wbuf);
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if (err)
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goto out_return;
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err = ubifs_add_bud_to_log(c, jhead, lnum, offs);
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if (err)
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goto out_return;
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err = ubifs_wbuf_seek_nolock(wbuf, lnum, offs);
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if (err)
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goto out_unlock;
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return 0;
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out_unlock:
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mutex_unlock(&wbuf->io_mutex);
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return err;
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out_return:
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/* An error occurred and the LEB has to be returned to lprops */
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ubifs_assert(c, err < 0);
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err1 = ubifs_return_leb(c, lnum);
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if (err1 && err == -EAGAIN)
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/*
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* Return original error code only if it is not %-EAGAIN,
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* which is not really an error. Otherwise, return the error
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* code of 'ubifs_return_leb()'.
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*/
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err = err1;
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mutex_unlock(&wbuf->io_mutex);
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return err;
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}
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static int ubifs_hash_nodes(struct ubifs_info *c, void *node,
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int len, struct shash_desc *hash)
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{
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int auth_node_size = ubifs_auth_node_sz(c);
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int err;
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while (1) {
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const struct ubifs_ch *ch = node;
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int nodelen = le32_to_cpu(ch->len);
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ubifs_assert(c, len >= auth_node_size);
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if (len == auth_node_size)
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break;
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ubifs_assert(c, len > nodelen);
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ubifs_assert(c, ch->magic == cpu_to_le32(UBIFS_NODE_MAGIC));
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err = ubifs_shash_update(c, hash, (void *)node, nodelen);
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if (err)
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return err;
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node += ALIGN(nodelen, 8);
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len -= ALIGN(nodelen, 8);
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}
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return ubifs_prepare_auth_node(c, node, hash);
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}
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/**
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* write_head - write data to a journal head.
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* @c: UBIFS file-system description object
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* @jhead: journal head
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* @buf: buffer to write
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* @len: length to write
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* @lnum: LEB number written is returned here
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* @offs: offset written is returned here
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* @sync: non-zero if the write-buffer has to by synchronized
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*
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* This function writes data to the reserved space of journal head @jhead.
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* Returns zero in case of success and a negative error code in case of
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* failure.
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*/
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static int write_head(struct ubifs_info *c, int jhead, void *buf, int len,
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int *lnum, int *offs, int sync)
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{
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int err;
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struct ubifs_wbuf *wbuf = &c->jheads[jhead].wbuf;
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ubifs_assert(c, jhead != GCHD);
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*lnum = c->jheads[jhead].wbuf.lnum;
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*offs = c->jheads[jhead].wbuf.offs + c->jheads[jhead].wbuf.used;
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dbg_jnl("jhead %s, LEB %d:%d, len %d",
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dbg_jhead(jhead), *lnum, *offs, len);
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if (ubifs_authenticated(c)) {
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err = ubifs_hash_nodes(c, buf, len, c->jheads[jhead].log_hash);
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if (err)
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return err;
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}
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err = ubifs_wbuf_write_nolock(wbuf, buf, len);
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if (err)
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return err;
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if (sync)
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err = ubifs_wbuf_sync_nolock(wbuf);
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return err;
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}
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/**
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* make_reservation - reserve journal space.
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* @c: UBIFS file-system description object
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* @jhead: journal head
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* @len: how many bytes to reserve
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*
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* This function makes space reservation in journal head @jhead. The function
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* takes the commit lock and locks the journal head, and the caller has to
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* unlock the head and finish the reservation with 'finish_reservation()'.
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* Returns zero in case of success and a negative error code in case of
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* failure.
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*
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* Note, the journal head may be unlocked as soon as the data is written, while
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* the commit lock has to be released after the data has been added to the
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* TNC.
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*/
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static int make_reservation(struct ubifs_info *c, int jhead, int len)
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{
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int err, cmt_retries = 0, nospc_retries = 0;
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again:
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down_read(&c->commit_sem);
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err = reserve_space(c, jhead, len);
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if (!err)
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/* c->commit_sem will get released via finish_reservation(). */
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return 0;
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up_read(&c->commit_sem);
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if (err == -ENOSPC) {
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/*
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* GC could not make any progress. We should try to commit
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* once because it could make some dirty space and GC would
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* make progress, so make the error -EAGAIN so that the below
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* will commit and re-try.
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*/
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if (nospc_retries++ < 2) {
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dbg_jnl("no space, retry");
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err = -EAGAIN;
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}
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/*
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* This means that the budgeting is incorrect. We always have
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* to be able to write to the media, because all operations are
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* budgeted. Deletions are not budgeted, though, but we reserve
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* an extra LEB for them.
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*/
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}
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if (err != -EAGAIN)
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goto out;
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/*
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* -EAGAIN means that the journal is full or too large, or the above
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* code wants to do one commit. Do this and re-try.
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*/
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if (cmt_retries > 128) {
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/*
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* This should not happen unless the journal size limitations
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* are too tough.
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*/
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ubifs_err(c, "stuck in space allocation");
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err = -ENOSPC;
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goto out;
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} else if (cmt_retries > 32)
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ubifs_warn(c, "too many space allocation re-tries (%d)",
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cmt_retries);
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dbg_jnl("-EAGAIN, commit and retry (retried %d times)",
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cmt_retries);
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cmt_retries += 1;
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err = ubifs_run_commit(c);
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if (err)
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return err;
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goto again;
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out:
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ubifs_err(c, "cannot reserve %d bytes in jhead %d, error %d",
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len, jhead, err);
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if (err == -ENOSPC) {
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/* This are some budgeting problems, print useful information */
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down_write(&c->commit_sem);
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dump_stack();
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ubifs_dump_budg(c, &c->bi);
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ubifs_dump_lprops(c);
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cmt_retries = dbg_check_lprops(c);
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up_write(&c->commit_sem);
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}
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return err;
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}
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/**
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* release_head - release a journal head.
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* @c: UBIFS file-system description object
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* @jhead: journal head
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*
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* This function releases journal head @jhead which was locked by
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* the 'make_reservation()' function. It has to be called after each successful
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* 'make_reservation()' invocation.
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*/
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static inline void release_head(struct ubifs_info *c, int jhead)
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{
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mutex_unlock(&c->jheads[jhead].wbuf.io_mutex);
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}
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/**
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* finish_reservation - finish a reservation.
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* @c: UBIFS file-system description object
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*
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* This function finishes journal space reservation. It must be called after
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* 'make_reservation()'.
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*/
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static void finish_reservation(struct ubifs_info *c)
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{
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up_read(&c->commit_sem);
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}
|
|
|
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/**
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* get_dent_type - translate VFS inode mode to UBIFS directory entry type.
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* @mode: inode mode
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*/
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static int get_dent_type(int mode)
|
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{
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switch (mode & S_IFMT) {
|
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case S_IFREG:
|
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return UBIFS_ITYPE_REG;
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|
case S_IFDIR:
|
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return UBIFS_ITYPE_DIR;
|
|
case S_IFLNK:
|
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return UBIFS_ITYPE_LNK;
|
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case S_IFBLK:
|
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return UBIFS_ITYPE_BLK;
|
|
case S_IFCHR:
|
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return UBIFS_ITYPE_CHR;
|
|
case S_IFIFO:
|
|
return UBIFS_ITYPE_FIFO;
|
|
case S_IFSOCK:
|
|
return UBIFS_ITYPE_SOCK;
|
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default:
|
|
BUG();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pack_inode - pack an inode node.
|
|
* @c: UBIFS file-system description object
|
|
* @ino: buffer in which to pack inode node
|
|
* @inode: inode to pack
|
|
* @last: indicates the last node of the group
|
|
*/
|
|
static void pack_inode(struct ubifs_info *c, struct ubifs_ino_node *ino,
|
|
const struct inode *inode, int last)
|
|
{
|
|
int data_len = 0, last_reference = !inode->i_nlink;
|
|
struct ubifs_inode *ui = ubifs_inode(inode);
|
|
|
|
ino->ch.node_type = UBIFS_INO_NODE;
|
|
ino_key_init_flash(c, &ino->key, inode->i_ino);
|
|
ino->creat_sqnum = cpu_to_le64(ui->creat_sqnum);
|
|
ino->atime_sec = cpu_to_le64(inode->i_atime.tv_sec);
|
|
ino->atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
|
|
ino->ctime_sec = cpu_to_le64(inode->i_ctime.tv_sec);
|
|
ino->ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
|
|
ino->mtime_sec = cpu_to_le64(inode->i_mtime.tv_sec);
|
|
ino->mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
|
|
ino->uid = cpu_to_le32(i_uid_read(inode));
|
|
ino->gid = cpu_to_le32(i_gid_read(inode));
|
|
ino->mode = cpu_to_le32(inode->i_mode);
|
|
ino->flags = cpu_to_le32(ui->flags);
|
|
ino->size = cpu_to_le64(ui->ui_size);
|
|
ino->nlink = cpu_to_le32(inode->i_nlink);
|
|
ino->compr_type = cpu_to_le16(ui->compr_type);
|
|
ino->data_len = cpu_to_le32(ui->data_len);
|
|
ino->xattr_cnt = cpu_to_le32(ui->xattr_cnt);
|
|
ino->xattr_size = cpu_to_le32(ui->xattr_size);
|
|
ino->xattr_names = cpu_to_le32(ui->xattr_names);
|
|
zero_ino_node_unused(ino);
|
|
|
|
/*
|
|
* Drop the attached data if this is a deletion inode, the data is not
|
|
* needed anymore.
|
|
*/
|
|
if (!last_reference) {
|
|
memcpy(ino->data, ui->data, ui->data_len);
|
|
data_len = ui->data_len;
|
|
}
|
|
|
|
ubifs_prep_grp_node(c, ino, UBIFS_INO_NODE_SZ + data_len, last);
|
|
}
|
|
|
|
/**
|
|
* mark_inode_clean - mark UBIFS inode as clean.
|
|
* @c: UBIFS file-system description object
|
|
* @ui: UBIFS inode to mark as clean
|
|
*
|
|
* This helper function marks UBIFS inode @ui as clean by cleaning the
|
|
* @ui->dirty flag and releasing its budget. Note, VFS may still treat the
|
|
* inode as dirty and try to write it back, but 'ubifs_write_inode()' would
|
|
* just do nothing.
|
|
*/
|
|
static void mark_inode_clean(struct ubifs_info *c, struct ubifs_inode *ui)
|
|
{
|
|
if (ui->dirty)
|
|
ubifs_release_dirty_inode_budget(c, ui);
|
|
ui->dirty = 0;
|
|
}
|
|
|
|
static void set_dent_cookie(struct ubifs_info *c, struct ubifs_dent_node *dent)
|
|
{
|
|
if (c->double_hash)
|
|
dent->cookie = (__force __le32) prandom_u32();
|
|
else
|
|
dent->cookie = 0;
|
|
}
|
|
|
|
/**
|
|
* ubifs_jnl_update - update inode.
|
|
* @c: UBIFS file-system description object
|
|
* @dir: parent inode or host inode in case of extended attributes
|
|
* @nm: directory entry name
|
|
* @inode: inode to update
|
|
* @deletion: indicates a directory entry deletion i.e unlink or rmdir
|
|
* @xent: non-zero if the directory entry is an extended attribute entry
|
|
*
|
|
* This function updates an inode by writing a directory entry (or extended
|
|
* attribute entry), the inode itself, and the parent directory inode (or the
|
|
* host inode) to the journal.
|
|
*
|
|
* The function writes the host inode @dir last, which is important in case of
|
|
* extended attributes. Indeed, then we guarantee that if the host inode gets
|
|
* synchronized (with 'fsync()'), and the write-buffer it sits in gets flushed,
|
|
* the extended attribute inode gets flushed too. And this is exactly what the
|
|
* user expects - synchronizing the host inode synchronizes its extended
|
|
* attributes. Similarly, this guarantees that if @dir is synchronized, its
|
|
* directory entry corresponding to @nm gets synchronized too.
|
|
*
|
|
* If the inode (@inode) or the parent directory (@dir) are synchronous, this
|
|
* function synchronizes the write-buffer.
|
|
*
|
|
* This function marks the @dir and @inode inodes as clean and returns zero on
|
|
* success. In case of failure, a negative error code is returned.
|
|
*/
|
|
int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir,
|
|
const struct fscrypt_name *nm, const struct inode *inode,
|
|
int deletion, int xent)
|
|
{
|
|
int err, dlen, ilen, len, lnum, ino_offs, dent_offs, orphan_added = 0;
|
|
int aligned_dlen, aligned_ilen, sync = IS_DIRSYNC(dir);
|
|
int last_reference = !!(deletion && inode->i_nlink == 0);
|
|
struct ubifs_inode *ui = ubifs_inode(inode);
|
|
struct ubifs_inode *host_ui = ubifs_inode(dir);
|
|
struct ubifs_dent_node *dent;
|
|
struct ubifs_ino_node *ino;
|
|
union ubifs_key dent_key, ino_key;
|
|
u8 hash_dent[UBIFS_HASH_ARR_SZ];
|
|
u8 hash_ino[UBIFS_HASH_ARR_SZ];
|
|
u8 hash_ino_host[UBIFS_HASH_ARR_SZ];
|
|
|
|
ubifs_assert(c, mutex_is_locked(&host_ui->ui_mutex));
|
|
|
|
dlen = UBIFS_DENT_NODE_SZ + fname_len(nm) + 1;
|
|
ilen = UBIFS_INO_NODE_SZ;
|
|
|
|
/*
|
|
* If the last reference to the inode is being deleted, then there is
|
|
* no need to attach and write inode data, it is being deleted anyway.
|
|
* And if the inode is being deleted, no need to synchronize
|
|
* write-buffer even if the inode is synchronous.
|
|
*/
|
|
if (!last_reference) {
|
|
ilen += ui->data_len;
|
|
sync |= IS_SYNC(inode);
|
|
}
|
|
|
|
aligned_dlen = ALIGN(dlen, 8);
|
|
aligned_ilen = ALIGN(ilen, 8);
|
|
|
|
len = aligned_dlen + aligned_ilen + UBIFS_INO_NODE_SZ;
|
|
/* Make sure to also account for extended attributes */
|
|
if (ubifs_authenticated(c))
|
|
len += ALIGN(host_ui->data_len, 8) + ubifs_auth_node_sz(c);
|
|
else
|
|
len += host_ui->data_len;
|
|
|
|
dent = kzalloc(len, GFP_NOFS);
|
|
if (!dent)
|
|
return -ENOMEM;
|
|
|
|
/* Make reservation before allocating sequence numbers */
|
|
err = make_reservation(c, BASEHD, len);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
if (!xent) {
|
|
dent->ch.node_type = UBIFS_DENT_NODE;
|
|
if (fname_name(nm) == NULL)
|
|
dent_key_init_hash(c, &dent_key, dir->i_ino, nm->hash);
|
|
else
|
|
dent_key_init(c, &dent_key, dir->i_ino, nm);
|
|
} else {
|
|
dent->ch.node_type = UBIFS_XENT_NODE;
|
|
xent_key_init(c, &dent_key, dir->i_ino, nm);
|
|
}
|
|
|
|
key_write(c, &dent_key, dent->key);
|
|
dent->inum = deletion ? 0 : cpu_to_le64(inode->i_ino);
|
|
dent->type = get_dent_type(inode->i_mode);
|
|
dent->nlen = cpu_to_le16(fname_len(nm));
|
|
memcpy(dent->name, fname_name(nm), fname_len(nm));
|
|
dent->name[fname_len(nm)] = '\0';
|
|
set_dent_cookie(c, dent);
|
|
|
|
zero_dent_node_unused(dent);
|
|
ubifs_prep_grp_node(c, dent, dlen, 0);
|
|
err = ubifs_node_calc_hash(c, dent, hash_dent);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
ino = (void *)dent + aligned_dlen;
|
|
pack_inode(c, ino, inode, 0);
|
|
err = ubifs_node_calc_hash(c, ino, hash_ino);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
ino = (void *)ino + aligned_ilen;
|
|
pack_inode(c, ino, dir, 1);
|
|
err = ubifs_node_calc_hash(c, ino, hash_ino_host);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
if (last_reference) {
|
|
err = ubifs_add_orphan(c, inode->i_ino);
|
|
if (err) {
|
|
release_head(c, BASEHD);
|
|
goto out_finish;
|
|
}
|
|
ui->del_cmtno = c->cmt_no;
|
|
orphan_added = 1;
|
|
}
|
|
|
|
err = write_head(c, BASEHD, dent, len, &lnum, &dent_offs, sync);
|
|
if (err)
|
|
goto out_release;
|
|
if (!sync) {
|
|
struct ubifs_wbuf *wbuf = &c->jheads[BASEHD].wbuf;
|
|
|
|
ubifs_wbuf_add_ino_nolock(wbuf, inode->i_ino);
|
|
ubifs_wbuf_add_ino_nolock(wbuf, dir->i_ino);
|
|
}
|
|
release_head(c, BASEHD);
|
|
kfree(dent);
|
|
ubifs_add_auth_dirt(c, lnum);
|
|
|
|
if (deletion) {
|
|
if (fname_name(nm) == NULL)
|
|
err = ubifs_tnc_remove_dh(c, &dent_key, nm->minor_hash);
|
|
else
|
|
err = ubifs_tnc_remove_nm(c, &dent_key, nm);
|
|
if (err)
|
|
goto out_ro;
|
|
err = ubifs_add_dirt(c, lnum, dlen);
|
|
} else
|
|
err = ubifs_tnc_add_nm(c, &dent_key, lnum, dent_offs, dlen,
|
|
hash_dent, nm);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
/*
|
|
* Note, we do not remove the inode from TNC even if the last reference
|
|
* to it has just been deleted, because the inode may still be opened.
|
|
* Instead, the inode has been added to orphan lists and the orphan
|
|
* subsystem will take further care about it.
|
|
*/
|
|
ino_key_init(c, &ino_key, inode->i_ino);
|
|
ino_offs = dent_offs + aligned_dlen;
|
|
err = ubifs_tnc_add(c, &ino_key, lnum, ino_offs, ilen, hash_ino);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
ino_key_init(c, &ino_key, dir->i_ino);
|
|
ino_offs += aligned_ilen;
|
|
err = ubifs_tnc_add(c, &ino_key, lnum, ino_offs,
|
|
UBIFS_INO_NODE_SZ + host_ui->data_len, hash_ino_host);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
finish_reservation(c);
|
|
spin_lock(&ui->ui_lock);
|
|
ui->synced_i_size = ui->ui_size;
|
|
spin_unlock(&ui->ui_lock);
|
|
if (xent) {
|
|
spin_lock(&host_ui->ui_lock);
|
|
host_ui->synced_i_size = host_ui->ui_size;
|
|
spin_unlock(&host_ui->ui_lock);
|
|
}
|
|
mark_inode_clean(c, ui);
|
|
mark_inode_clean(c, host_ui);
|
|
return 0;
|
|
|
|
out_finish:
|
|
finish_reservation(c);
|
|
out_free:
|
|
kfree(dent);
|
|
return err;
|
|
|
|
out_release:
|
|
release_head(c, BASEHD);
|
|
kfree(dent);
|
|
out_ro:
|
|
ubifs_ro_mode(c, err);
|
|
if (orphan_added)
|
|
ubifs_delete_orphan(c, inode->i_ino);
|
|
finish_reservation(c);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubifs_jnl_write_data - write a data node to the journal.
|
|
* @c: UBIFS file-system description object
|
|
* @inode: inode the data node belongs to
|
|
* @key: node key
|
|
* @buf: buffer to write
|
|
* @len: data length (must not exceed %UBIFS_BLOCK_SIZE)
|
|
*
|
|
* This function writes a data node to the journal. Returns %0 if the data node
|
|
* was successfully written, and a negative error code in case of failure.
|
|
*/
|
|
int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
|
|
const union ubifs_key *key, const void *buf, int len)
|
|
{
|
|
struct ubifs_data_node *data;
|
|
int err, lnum, offs, compr_type, out_len, compr_len, auth_len;
|
|
int dlen = COMPRESSED_DATA_NODE_BUF_SZ, allocated = 1;
|
|
int write_len;
|
|
struct ubifs_inode *ui = ubifs_inode(inode);
|
|
bool encrypted = IS_ENCRYPTED(inode);
|
|
u8 hash[UBIFS_HASH_ARR_SZ];
|
|
|
|
dbg_jnlk(key, "ino %lu, blk %u, len %d, key ",
|
|
(unsigned long)key_inum(c, key), key_block(c, key), len);
|
|
ubifs_assert(c, len <= UBIFS_BLOCK_SIZE);
|
|
|
|
if (encrypted)
|
|
dlen += UBIFS_CIPHER_BLOCK_SIZE;
|
|
|
|
auth_len = ubifs_auth_node_sz(c);
|
|
|
|
data = kmalloc(dlen + auth_len, GFP_NOFS | __GFP_NOWARN);
|
|
if (!data) {
|
|
/*
|
|
* Fall-back to the write reserve buffer. Note, we might be
|
|
* currently on the memory reclaim path, when the kernel is
|
|
* trying to free some memory by writing out dirty pages. The
|
|
* write reserve buffer helps us to guarantee that we are
|
|
* always able to write the data.
|
|
*/
|
|
allocated = 0;
|
|
mutex_lock(&c->write_reserve_mutex);
|
|
data = c->write_reserve_buf;
|
|
}
|
|
|
|
data->ch.node_type = UBIFS_DATA_NODE;
|
|
key_write(c, key, &data->key);
|
|
data->size = cpu_to_le32(len);
|
|
|
|
if (!(ui->flags & UBIFS_COMPR_FL))
|
|
/* Compression is disabled for this inode */
|
|
compr_type = UBIFS_COMPR_NONE;
|
|
else
|
|
compr_type = ui->compr_type;
|
|
|
|
out_len = compr_len = dlen - UBIFS_DATA_NODE_SZ;
|
|
ubifs_compress(c, buf, len, &data->data, &compr_len, &compr_type);
|
|
ubifs_assert(c, compr_len <= UBIFS_BLOCK_SIZE);
|
|
|
|
if (encrypted) {
|
|
err = ubifs_encrypt(inode, data, compr_len, &out_len, key_block(c, key));
|
|
if (err)
|
|
goto out_free;
|
|
|
|
} else {
|
|
data->compr_size = 0;
|
|
out_len = compr_len;
|
|
}
|
|
|
|
dlen = UBIFS_DATA_NODE_SZ + out_len;
|
|
if (ubifs_authenticated(c))
|
|
write_len = ALIGN(dlen, 8) + auth_len;
|
|
else
|
|
write_len = dlen;
|
|
|
|
data->compr_type = cpu_to_le16(compr_type);
|
|
|
|
/* Make reservation before allocating sequence numbers */
|
|
err = make_reservation(c, DATAHD, write_len);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
ubifs_prepare_node(c, data, dlen, 0);
|
|
err = write_head(c, DATAHD, data, write_len, &lnum, &offs, 0);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
err = ubifs_node_calc_hash(c, data, hash);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
ubifs_wbuf_add_ino_nolock(&c->jheads[DATAHD].wbuf, key_inum(c, key));
|
|
release_head(c, DATAHD);
|
|
|
|
ubifs_add_auth_dirt(c, lnum);
|
|
|
|
err = ubifs_tnc_add(c, key, lnum, offs, dlen, hash);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
finish_reservation(c);
|
|
if (!allocated)
|
|
mutex_unlock(&c->write_reserve_mutex);
|
|
else
|
|
kfree(data);
|
|
return 0;
|
|
|
|
out_release:
|
|
release_head(c, DATAHD);
|
|
out_ro:
|
|
ubifs_ro_mode(c, err);
|
|
finish_reservation(c);
|
|
out_free:
|
|
if (!allocated)
|
|
mutex_unlock(&c->write_reserve_mutex);
|
|
else
|
|
kfree(data);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubifs_jnl_write_inode - flush inode to the journal.
|
|
* @c: UBIFS file-system description object
|
|
* @inode: inode to flush
|
|
*
|
|
* This function writes inode @inode to the journal. If the inode is
|
|
* synchronous, it also synchronizes the write-buffer. Returns zero in case of
|
|
* success and a negative error code in case of failure.
|
|
*/
|
|
int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode)
|
|
{
|
|
int err, lnum, offs;
|
|
struct ubifs_ino_node *ino, *ino_start;
|
|
struct ubifs_inode *ui = ubifs_inode(inode);
|
|
int sync = 0, write_len = 0, ilen = UBIFS_INO_NODE_SZ;
|
|
int last_reference = !inode->i_nlink;
|
|
int kill_xattrs = ui->xattr_cnt && last_reference;
|
|
u8 hash[UBIFS_HASH_ARR_SZ];
|
|
|
|
dbg_jnl("ino %lu, nlink %u", inode->i_ino, inode->i_nlink);
|
|
|
|
/*
|
|
* If the inode is being deleted, do not write the attached data. No
|
|
* need to synchronize the write-buffer either.
|
|
*/
|
|
if (!last_reference) {
|
|
ilen += ui->data_len;
|
|
sync = IS_SYNC(inode);
|
|
} else if (kill_xattrs) {
|
|
write_len += UBIFS_INO_NODE_SZ * ui->xattr_cnt;
|
|
}
|
|
|
|
if (ubifs_authenticated(c))
|
|
write_len += ALIGN(ilen, 8) + ubifs_auth_node_sz(c);
|
|
else
|
|
write_len += ilen;
|
|
|
|
ino_start = ino = kmalloc(write_len, GFP_NOFS);
|
|
if (!ino)
|
|
return -ENOMEM;
|
|
|
|
/* Make reservation before allocating sequence numbers */
|
|
err = make_reservation(c, BASEHD, write_len);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
if (kill_xattrs) {
|
|
union ubifs_key key;
|
|
struct fscrypt_name nm = {0};
|
|
struct inode *xino;
|
|
struct ubifs_dent_node *xent, *pxent = NULL;
|
|
|
|
if (ui->xattr_cnt > ubifs_xattr_max_cnt(c)) {
|
|
err = -EPERM;
|
|
ubifs_err(c, "Cannot delete inode, it has too much xattrs!");
|
|
goto out_release;
|
|
}
|
|
|
|
lowest_xent_key(c, &key, inode->i_ino);
|
|
while (1) {
|
|
xent = ubifs_tnc_next_ent(c, &key, &nm);
|
|
if (IS_ERR(xent)) {
|
|
err = PTR_ERR(xent);
|
|
if (err == -ENOENT)
|
|
break;
|
|
|
|
kfree(pxent);
|
|
goto out_release;
|
|
}
|
|
|
|
fname_name(&nm) = xent->name;
|
|
fname_len(&nm) = le16_to_cpu(xent->nlen);
|
|
|
|
xino = ubifs_iget(c->vfs_sb, le64_to_cpu(xent->inum));
|
|
if (IS_ERR(xino)) {
|
|
err = PTR_ERR(xino);
|
|
ubifs_err(c, "dead directory entry '%s', error %d",
|
|
xent->name, err);
|
|
ubifs_ro_mode(c, err);
|
|
kfree(pxent);
|
|
kfree(xent);
|
|
goto out_release;
|
|
}
|
|
ubifs_assert(c, ubifs_inode(xino)->xattr);
|
|
|
|
clear_nlink(xino);
|
|
pack_inode(c, ino, xino, 0);
|
|
ino = (void *)ino + UBIFS_INO_NODE_SZ;
|
|
iput(xino);
|
|
|
|
kfree(pxent);
|
|
pxent = xent;
|
|
key_read(c, &xent->key, &key);
|
|
}
|
|
kfree(pxent);
|
|
}
|
|
|
|
pack_inode(c, ino, inode, 1);
|
|
err = ubifs_node_calc_hash(c, ino, hash);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
err = write_head(c, BASEHD, ino_start, write_len, &lnum, &offs, sync);
|
|
if (err)
|
|
goto out_release;
|
|
if (!sync)
|
|
ubifs_wbuf_add_ino_nolock(&c->jheads[BASEHD].wbuf,
|
|
inode->i_ino);
|
|
release_head(c, BASEHD);
|
|
|
|
if (last_reference) {
|
|
err = ubifs_tnc_remove_ino(c, inode->i_ino);
|
|
if (err)
|
|
goto out_ro;
|
|
ubifs_delete_orphan(c, inode->i_ino);
|
|
err = ubifs_add_dirt(c, lnum, write_len);
|
|
} else {
|
|
union ubifs_key key;
|
|
|
|
ubifs_add_auth_dirt(c, lnum);
|
|
|
|
ino_key_init(c, &key, inode->i_ino);
|
|
err = ubifs_tnc_add(c, &key, lnum, offs, ilen, hash);
|
|
}
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
finish_reservation(c);
|
|
spin_lock(&ui->ui_lock);
|
|
ui->synced_i_size = ui->ui_size;
|
|
spin_unlock(&ui->ui_lock);
|
|
kfree(ino_start);
|
|
return 0;
|
|
|
|
out_release:
|
|
release_head(c, BASEHD);
|
|
out_ro:
|
|
ubifs_ro_mode(c, err);
|
|
finish_reservation(c);
|
|
out_free:
|
|
kfree(ino_start);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubifs_jnl_delete_inode - delete an inode.
|
|
* @c: UBIFS file-system description object
|
|
* @inode: inode to delete
|
|
*
|
|
* This function deletes inode @inode which includes removing it from orphans,
|
|
* deleting it from TNC and, in some cases, writing a deletion inode to the
|
|
* journal.
|
|
*
|
|
* When regular file inodes are unlinked or a directory inode is removed, the
|
|
* 'ubifs_jnl_update()' function writes a corresponding deletion inode and
|
|
* direntry to the media, and adds the inode to orphans. After this, when the
|
|
* last reference to this inode has been dropped, this function is called. In
|
|
* general, it has to write one more deletion inode to the media, because if
|
|
* a commit happened between 'ubifs_jnl_update()' and
|
|
* 'ubifs_jnl_delete_inode()', the deletion inode is not in the journal
|
|
* anymore, and in fact it might not be on the flash anymore, because it might
|
|
* have been garbage-collected already. And for optimization reasons UBIFS does
|
|
* not read the orphan area if it has been unmounted cleanly, so it would have
|
|
* no indication in the journal that there is a deleted inode which has to be
|
|
* removed from TNC.
|
|
*
|
|
* However, if there was no commit between 'ubifs_jnl_update()' and
|
|
* 'ubifs_jnl_delete_inode()', then there is no need to write the deletion
|
|
* inode to the media for the second time. And this is quite a typical case.
|
|
*
|
|
* This function returns zero in case of success and a negative error code in
|
|
* case of failure.
|
|
*/
|
|
int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode)
|
|
{
|
|
int err;
|
|
struct ubifs_inode *ui = ubifs_inode(inode);
|
|
|
|
ubifs_assert(c, inode->i_nlink == 0);
|
|
|
|
if (ui->xattr_cnt || ui->del_cmtno != c->cmt_no)
|
|
/* A commit happened for sure or inode hosts xattrs */
|
|
return ubifs_jnl_write_inode(c, inode);
|
|
|
|
down_read(&c->commit_sem);
|
|
/*
|
|
* Check commit number again, because the first test has been done
|
|
* without @c->commit_sem, so a commit might have happened.
|
|
*/
|
|
if (ui->del_cmtno != c->cmt_no) {
|
|
up_read(&c->commit_sem);
|
|
return ubifs_jnl_write_inode(c, inode);
|
|
}
|
|
|
|
err = ubifs_tnc_remove_ino(c, inode->i_ino);
|
|
if (err)
|
|
ubifs_ro_mode(c, err);
|
|
else
|
|
ubifs_delete_orphan(c, inode->i_ino);
|
|
up_read(&c->commit_sem);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubifs_jnl_xrename - cross rename two directory entries.
|
|
* @c: UBIFS file-system description object
|
|
* @fst_dir: parent inode of 1st directory entry to exchange
|
|
* @fst_inode: 1st inode to exchange
|
|
* @fst_nm: name of 1st inode to exchange
|
|
* @snd_dir: parent inode of 2nd directory entry to exchange
|
|
* @snd_inode: 2nd inode to exchange
|
|
* @snd_nm: name of 2nd inode to exchange
|
|
* @sync: non-zero if the write-buffer has to be synchronized
|
|
*
|
|
* This function implements the cross rename operation which may involve
|
|
* writing 2 inodes and 2 directory entries. It marks the written inodes as clean
|
|
* and returns zero on success. In case of failure, a negative error code is
|
|
* returned.
|
|
*/
|
|
int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir,
|
|
const struct inode *fst_inode,
|
|
const struct fscrypt_name *fst_nm,
|
|
const struct inode *snd_dir,
|
|
const struct inode *snd_inode,
|
|
const struct fscrypt_name *snd_nm, int sync)
|
|
{
|
|
union ubifs_key key;
|
|
struct ubifs_dent_node *dent1, *dent2;
|
|
int err, dlen1, dlen2, lnum, offs, len, plen = UBIFS_INO_NODE_SZ;
|
|
int aligned_dlen1, aligned_dlen2;
|
|
int twoparents = (fst_dir != snd_dir);
|
|
void *p;
|
|
u8 hash_dent1[UBIFS_HASH_ARR_SZ];
|
|
u8 hash_dent2[UBIFS_HASH_ARR_SZ];
|
|
u8 hash_p1[UBIFS_HASH_ARR_SZ];
|
|
u8 hash_p2[UBIFS_HASH_ARR_SZ];
|
|
|
|
ubifs_assert(c, ubifs_inode(fst_dir)->data_len == 0);
|
|
ubifs_assert(c, ubifs_inode(snd_dir)->data_len == 0);
|
|
ubifs_assert(c, mutex_is_locked(&ubifs_inode(fst_dir)->ui_mutex));
|
|
ubifs_assert(c, mutex_is_locked(&ubifs_inode(snd_dir)->ui_mutex));
|
|
|
|
dlen1 = UBIFS_DENT_NODE_SZ + fname_len(snd_nm) + 1;
|
|
dlen2 = UBIFS_DENT_NODE_SZ + fname_len(fst_nm) + 1;
|
|
aligned_dlen1 = ALIGN(dlen1, 8);
|
|
aligned_dlen2 = ALIGN(dlen2, 8);
|
|
|
|
len = aligned_dlen1 + aligned_dlen2 + ALIGN(plen, 8);
|
|
if (twoparents)
|
|
len += plen;
|
|
|
|
len += ubifs_auth_node_sz(c);
|
|
|
|
dent1 = kzalloc(len, GFP_NOFS);
|
|
if (!dent1)
|
|
return -ENOMEM;
|
|
|
|
/* Make reservation before allocating sequence numbers */
|
|
err = make_reservation(c, BASEHD, len);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
/* Make new dent for 1st entry */
|
|
dent1->ch.node_type = UBIFS_DENT_NODE;
|
|
dent_key_init_flash(c, &dent1->key, snd_dir->i_ino, snd_nm);
|
|
dent1->inum = cpu_to_le64(fst_inode->i_ino);
|
|
dent1->type = get_dent_type(fst_inode->i_mode);
|
|
dent1->nlen = cpu_to_le16(fname_len(snd_nm));
|
|
memcpy(dent1->name, fname_name(snd_nm), fname_len(snd_nm));
|
|
dent1->name[fname_len(snd_nm)] = '\0';
|
|
set_dent_cookie(c, dent1);
|
|
zero_dent_node_unused(dent1);
|
|
ubifs_prep_grp_node(c, dent1, dlen1, 0);
|
|
err = ubifs_node_calc_hash(c, dent1, hash_dent1);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
/* Make new dent for 2nd entry */
|
|
dent2 = (void *)dent1 + aligned_dlen1;
|
|
dent2->ch.node_type = UBIFS_DENT_NODE;
|
|
dent_key_init_flash(c, &dent2->key, fst_dir->i_ino, fst_nm);
|
|
dent2->inum = cpu_to_le64(snd_inode->i_ino);
|
|
dent2->type = get_dent_type(snd_inode->i_mode);
|
|
dent2->nlen = cpu_to_le16(fname_len(fst_nm));
|
|
memcpy(dent2->name, fname_name(fst_nm), fname_len(fst_nm));
|
|
dent2->name[fname_len(fst_nm)] = '\0';
|
|
set_dent_cookie(c, dent2);
|
|
zero_dent_node_unused(dent2);
|
|
ubifs_prep_grp_node(c, dent2, dlen2, 0);
|
|
err = ubifs_node_calc_hash(c, dent2, hash_dent2);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
p = (void *)dent2 + aligned_dlen2;
|
|
if (!twoparents) {
|
|
pack_inode(c, p, fst_dir, 1);
|
|
err = ubifs_node_calc_hash(c, p, hash_p1);
|
|
if (err)
|
|
goto out_release;
|
|
} else {
|
|
pack_inode(c, p, fst_dir, 0);
|
|
err = ubifs_node_calc_hash(c, p, hash_p1);
|
|
if (err)
|
|
goto out_release;
|
|
p += ALIGN(plen, 8);
|
|
pack_inode(c, p, snd_dir, 1);
|
|
err = ubifs_node_calc_hash(c, p, hash_p2);
|
|
if (err)
|
|
goto out_release;
|
|
}
|
|
|
|
err = write_head(c, BASEHD, dent1, len, &lnum, &offs, sync);
|
|
if (err)
|
|
goto out_release;
|
|
if (!sync) {
|
|
struct ubifs_wbuf *wbuf = &c->jheads[BASEHD].wbuf;
|
|
|
|
ubifs_wbuf_add_ino_nolock(wbuf, fst_dir->i_ino);
|
|
ubifs_wbuf_add_ino_nolock(wbuf, snd_dir->i_ino);
|
|
}
|
|
release_head(c, BASEHD);
|
|
|
|
ubifs_add_auth_dirt(c, lnum);
|
|
|
|
dent_key_init(c, &key, snd_dir->i_ino, snd_nm);
|
|
err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen1, hash_dent1, snd_nm);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
offs += aligned_dlen1;
|
|
dent_key_init(c, &key, fst_dir->i_ino, fst_nm);
|
|
err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen2, hash_dent2, fst_nm);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
offs += aligned_dlen2;
|
|
|
|
ino_key_init(c, &key, fst_dir->i_ino);
|
|
err = ubifs_tnc_add(c, &key, lnum, offs, plen, hash_p1);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
if (twoparents) {
|
|
offs += ALIGN(plen, 8);
|
|
ino_key_init(c, &key, snd_dir->i_ino);
|
|
err = ubifs_tnc_add(c, &key, lnum, offs, plen, hash_p2);
|
|
if (err)
|
|
goto out_ro;
|
|
}
|
|
|
|
finish_reservation(c);
|
|
|
|
mark_inode_clean(c, ubifs_inode(fst_dir));
|
|
if (twoparents)
|
|
mark_inode_clean(c, ubifs_inode(snd_dir));
|
|
kfree(dent1);
|
|
return 0;
|
|
|
|
out_release:
|
|
release_head(c, BASEHD);
|
|
out_ro:
|
|
ubifs_ro_mode(c, err);
|
|
finish_reservation(c);
|
|
out_free:
|
|
kfree(dent1);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubifs_jnl_rename - rename a directory entry.
|
|
* @c: UBIFS file-system description object
|
|
* @old_dir: parent inode of directory entry to rename
|
|
* @old_dentry: directory entry to rename
|
|
* @new_dir: parent inode of directory entry to rename
|
|
* @new_dentry: new directory entry (or directory entry to replace)
|
|
* @sync: non-zero if the write-buffer has to be synchronized
|
|
*
|
|
* This function implements the re-name operation which may involve writing up
|
|
* to 4 inodes and 2 directory entries. It marks the written inodes as clean
|
|
* and returns zero on success. In case of failure, a negative error code is
|
|
* returned.
|
|
*/
|
|
int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
|
|
const struct inode *old_inode,
|
|
const struct fscrypt_name *old_nm,
|
|
const struct inode *new_dir,
|
|
const struct inode *new_inode,
|
|
const struct fscrypt_name *new_nm,
|
|
const struct inode *whiteout, int sync)
|
|
{
|
|
void *p;
|
|
union ubifs_key key;
|
|
struct ubifs_dent_node *dent, *dent2;
|
|
int err, dlen1, dlen2, ilen, lnum, offs, len, orphan_added = 0;
|
|
int aligned_dlen1, aligned_dlen2, plen = UBIFS_INO_NODE_SZ;
|
|
int last_reference = !!(new_inode && new_inode->i_nlink == 0);
|
|
int move = (old_dir != new_dir);
|
|
struct ubifs_inode *new_ui;
|
|
u8 hash_old_dir[UBIFS_HASH_ARR_SZ];
|
|
u8 hash_new_dir[UBIFS_HASH_ARR_SZ];
|
|
u8 hash_new_inode[UBIFS_HASH_ARR_SZ];
|
|
u8 hash_dent1[UBIFS_HASH_ARR_SZ];
|
|
u8 hash_dent2[UBIFS_HASH_ARR_SZ];
|
|
|
|
ubifs_assert(c, ubifs_inode(old_dir)->data_len == 0);
|
|
ubifs_assert(c, ubifs_inode(new_dir)->data_len == 0);
|
|
ubifs_assert(c, mutex_is_locked(&ubifs_inode(old_dir)->ui_mutex));
|
|
ubifs_assert(c, mutex_is_locked(&ubifs_inode(new_dir)->ui_mutex));
|
|
|
|
dlen1 = UBIFS_DENT_NODE_SZ + fname_len(new_nm) + 1;
|
|
dlen2 = UBIFS_DENT_NODE_SZ + fname_len(old_nm) + 1;
|
|
if (new_inode) {
|
|
new_ui = ubifs_inode(new_inode);
|
|
ubifs_assert(c, mutex_is_locked(&new_ui->ui_mutex));
|
|
ilen = UBIFS_INO_NODE_SZ;
|
|
if (!last_reference)
|
|
ilen += new_ui->data_len;
|
|
} else
|
|
ilen = 0;
|
|
|
|
aligned_dlen1 = ALIGN(dlen1, 8);
|
|
aligned_dlen2 = ALIGN(dlen2, 8);
|
|
len = aligned_dlen1 + aligned_dlen2 + ALIGN(ilen, 8) + ALIGN(plen, 8);
|
|
if (move)
|
|
len += plen;
|
|
|
|
len += ubifs_auth_node_sz(c);
|
|
|
|
dent = kzalloc(len, GFP_NOFS);
|
|
if (!dent)
|
|
return -ENOMEM;
|
|
|
|
/* Make reservation before allocating sequence numbers */
|
|
err = make_reservation(c, BASEHD, len);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
/* Make new dent */
|
|
dent->ch.node_type = UBIFS_DENT_NODE;
|
|
dent_key_init_flash(c, &dent->key, new_dir->i_ino, new_nm);
|
|
dent->inum = cpu_to_le64(old_inode->i_ino);
|
|
dent->type = get_dent_type(old_inode->i_mode);
|
|
dent->nlen = cpu_to_le16(fname_len(new_nm));
|
|
memcpy(dent->name, fname_name(new_nm), fname_len(new_nm));
|
|
dent->name[fname_len(new_nm)] = '\0';
|
|
set_dent_cookie(c, dent);
|
|
zero_dent_node_unused(dent);
|
|
ubifs_prep_grp_node(c, dent, dlen1, 0);
|
|
err = ubifs_node_calc_hash(c, dent, hash_dent1);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
dent2 = (void *)dent + aligned_dlen1;
|
|
dent2->ch.node_type = UBIFS_DENT_NODE;
|
|
dent_key_init_flash(c, &dent2->key, old_dir->i_ino, old_nm);
|
|
|
|
if (whiteout) {
|
|
dent2->inum = cpu_to_le64(whiteout->i_ino);
|
|
dent2->type = get_dent_type(whiteout->i_mode);
|
|
} else {
|
|
/* Make deletion dent */
|
|
dent2->inum = 0;
|
|
dent2->type = DT_UNKNOWN;
|
|
}
|
|
dent2->nlen = cpu_to_le16(fname_len(old_nm));
|
|
memcpy(dent2->name, fname_name(old_nm), fname_len(old_nm));
|
|
dent2->name[fname_len(old_nm)] = '\0';
|
|
set_dent_cookie(c, dent2);
|
|
zero_dent_node_unused(dent2);
|
|
ubifs_prep_grp_node(c, dent2, dlen2, 0);
|
|
err = ubifs_node_calc_hash(c, dent2, hash_dent2);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
p = (void *)dent2 + aligned_dlen2;
|
|
if (new_inode) {
|
|
pack_inode(c, p, new_inode, 0);
|
|
err = ubifs_node_calc_hash(c, p, hash_new_inode);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
p += ALIGN(ilen, 8);
|
|
}
|
|
|
|
if (!move) {
|
|
pack_inode(c, p, old_dir, 1);
|
|
err = ubifs_node_calc_hash(c, p, hash_old_dir);
|
|
if (err)
|
|
goto out_release;
|
|
} else {
|
|
pack_inode(c, p, old_dir, 0);
|
|
err = ubifs_node_calc_hash(c, p, hash_old_dir);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
p += ALIGN(plen, 8);
|
|
pack_inode(c, p, new_dir, 1);
|
|
err = ubifs_node_calc_hash(c, p, hash_new_dir);
|
|
if (err)
|
|
goto out_release;
|
|
}
|
|
|
|
if (last_reference) {
|
|
err = ubifs_add_orphan(c, new_inode->i_ino);
|
|
if (err) {
|
|
release_head(c, BASEHD);
|
|
goto out_finish;
|
|
}
|
|
new_ui->del_cmtno = c->cmt_no;
|
|
orphan_added = 1;
|
|
}
|
|
|
|
err = write_head(c, BASEHD, dent, len, &lnum, &offs, sync);
|
|
if (err)
|
|
goto out_release;
|
|
if (!sync) {
|
|
struct ubifs_wbuf *wbuf = &c->jheads[BASEHD].wbuf;
|
|
|
|
ubifs_wbuf_add_ino_nolock(wbuf, new_dir->i_ino);
|
|
ubifs_wbuf_add_ino_nolock(wbuf, old_dir->i_ino);
|
|
if (new_inode)
|
|
ubifs_wbuf_add_ino_nolock(&c->jheads[BASEHD].wbuf,
|
|
new_inode->i_ino);
|
|
}
|
|
release_head(c, BASEHD);
|
|
|
|
ubifs_add_auth_dirt(c, lnum);
|
|
|
|
dent_key_init(c, &key, new_dir->i_ino, new_nm);
|
|
err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen1, hash_dent1, new_nm);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
offs += aligned_dlen1;
|
|
if (whiteout) {
|
|
dent_key_init(c, &key, old_dir->i_ino, old_nm);
|
|
err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen2, hash_dent2, old_nm);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
ubifs_delete_orphan(c, whiteout->i_ino);
|
|
} else {
|
|
err = ubifs_add_dirt(c, lnum, dlen2);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
dent_key_init(c, &key, old_dir->i_ino, old_nm);
|
|
err = ubifs_tnc_remove_nm(c, &key, old_nm);
|
|
if (err)
|
|
goto out_ro;
|
|
}
|
|
|
|
offs += aligned_dlen2;
|
|
if (new_inode) {
|
|
ino_key_init(c, &key, new_inode->i_ino);
|
|
err = ubifs_tnc_add(c, &key, lnum, offs, ilen, hash_new_inode);
|
|
if (err)
|
|
goto out_ro;
|
|
offs += ALIGN(ilen, 8);
|
|
}
|
|
|
|
ino_key_init(c, &key, old_dir->i_ino);
|
|
err = ubifs_tnc_add(c, &key, lnum, offs, plen, hash_old_dir);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
if (move) {
|
|
offs += ALIGN(plen, 8);
|
|
ino_key_init(c, &key, new_dir->i_ino);
|
|
err = ubifs_tnc_add(c, &key, lnum, offs, plen, hash_new_dir);
|
|
if (err)
|
|
goto out_ro;
|
|
}
|
|
|
|
finish_reservation(c);
|
|
if (new_inode) {
|
|
mark_inode_clean(c, new_ui);
|
|
spin_lock(&new_ui->ui_lock);
|
|
new_ui->synced_i_size = new_ui->ui_size;
|
|
spin_unlock(&new_ui->ui_lock);
|
|
}
|
|
mark_inode_clean(c, ubifs_inode(old_dir));
|
|
if (move)
|
|
mark_inode_clean(c, ubifs_inode(new_dir));
|
|
kfree(dent);
|
|
return 0;
|
|
|
|
out_release:
|
|
release_head(c, BASEHD);
|
|
out_ro:
|
|
ubifs_ro_mode(c, err);
|
|
if (orphan_added)
|
|
ubifs_delete_orphan(c, new_inode->i_ino);
|
|
out_finish:
|
|
finish_reservation(c);
|
|
out_free:
|
|
kfree(dent);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* truncate_data_node - re-compress/encrypt a truncated data node.
|
|
* @c: UBIFS file-system description object
|
|
* @inode: inode which refers to the data node
|
|
* @block: data block number
|
|
* @dn: data node to re-compress
|
|
* @new_len: new length
|
|
*
|
|
* This function is used when an inode is truncated and the last data node of
|
|
* the inode has to be re-compressed/encrypted and re-written.
|
|
*/
|
|
static int truncate_data_node(const struct ubifs_info *c, const struct inode *inode,
|
|
unsigned int block, struct ubifs_data_node *dn,
|
|
int *new_len)
|
|
{
|
|
void *buf;
|
|
int err, dlen, compr_type, out_len, old_dlen;
|
|
|
|
out_len = le32_to_cpu(dn->size);
|
|
buf = kmalloc_array(out_len, WORST_COMPR_FACTOR, GFP_NOFS);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
dlen = old_dlen = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ;
|
|
compr_type = le16_to_cpu(dn->compr_type);
|
|
|
|
if (IS_ENCRYPTED(inode)) {
|
|
err = ubifs_decrypt(inode, dn, &dlen, block);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
if (compr_type == UBIFS_COMPR_NONE) {
|
|
out_len = *new_len;
|
|
} else {
|
|
err = ubifs_decompress(c, &dn->data, dlen, buf, &out_len, compr_type);
|
|
if (err)
|
|
goto out;
|
|
|
|
ubifs_compress(c, buf, *new_len, &dn->data, &out_len, &compr_type);
|
|
}
|
|
|
|
if (IS_ENCRYPTED(inode)) {
|
|
err = ubifs_encrypt(inode, dn, out_len, &old_dlen, block);
|
|
if (err)
|
|
goto out;
|
|
|
|
out_len = old_dlen;
|
|
} else {
|
|
dn->compr_size = 0;
|
|
}
|
|
|
|
ubifs_assert(c, out_len <= UBIFS_BLOCK_SIZE);
|
|
dn->compr_type = cpu_to_le16(compr_type);
|
|
dn->size = cpu_to_le32(*new_len);
|
|
*new_len = UBIFS_DATA_NODE_SZ + out_len;
|
|
err = 0;
|
|
out:
|
|
kfree(buf);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubifs_jnl_truncate - update the journal for a truncation.
|
|
* @c: UBIFS file-system description object
|
|
* @inode: inode to truncate
|
|
* @old_size: old size
|
|
* @new_size: new size
|
|
*
|
|
* When the size of a file decreases due to truncation, a truncation node is
|
|
* written, the journal tree is updated, and the last data block is re-written
|
|
* if it has been affected. The inode is also updated in order to synchronize
|
|
* the new inode size.
|
|
*
|
|
* This function marks the inode as clean and returns zero on success. In case
|
|
* of failure, a negative error code is returned.
|
|
*/
|
|
int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode,
|
|
loff_t old_size, loff_t new_size)
|
|
{
|
|
union ubifs_key key, to_key;
|
|
struct ubifs_ino_node *ino;
|
|
struct ubifs_trun_node *trun;
|
|
struct ubifs_data_node *dn;
|
|
int err, dlen, len, lnum, offs, bit, sz, sync = IS_SYNC(inode);
|
|
struct ubifs_inode *ui = ubifs_inode(inode);
|
|
ino_t inum = inode->i_ino;
|
|
unsigned int blk;
|
|
u8 hash_ino[UBIFS_HASH_ARR_SZ];
|
|
u8 hash_dn[UBIFS_HASH_ARR_SZ];
|
|
|
|
dbg_jnl("ino %lu, size %lld -> %lld",
|
|
(unsigned long)inum, old_size, new_size);
|
|
ubifs_assert(c, !ui->data_len);
|
|
ubifs_assert(c, S_ISREG(inode->i_mode));
|
|
ubifs_assert(c, mutex_is_locked(&ui->ui_mutex));
|
|
|
|
sz = UBIFS_TRUN_NODE_SZ + UBIFS_INO_NODE_SZ +
|
|
UBIFS_MAX_DATA_NODE_SZ * WORST_COMPR_FACTOR;
|
|
|
|
sz += ubifs_auth_node_sz(c);
|
|
|
|
ino = kmalloc(sz, GFP_NOFS);
|
|
if (!ino)
|
|
return -ENOMEM;
|
|
|
|
trun = (void *)ino + UBIFS_INO_NODE_SZ;
|
|
trun->ch.node_type = UBIFS_TRUN_NODE;
|
|
trun->inum = cpu_to_le32(inum);
|
|
trun->old_size = cpu_to_le64(old_size);
|
|
trun->new_size = cpu_to_le64(new_size);
|
|
zero_trun_node_unused(trun);
|
|
|
|
dlen = new_size & (UBIFS_BLOCK_SIZE - 1);
|
|
if (dlen) {
|
|
/* Get last data block so it can be truncated */
|
|
dn = (void *)trun + UBIFS_TRUN_NODE_SZ;
|
|
blk = new_size >> UBIFS_BLOCK_SHIFT;
|
|
data_key_init(c, &key, inum, blk);
|
|
dbg_jnlk(&key, "last block key ");
|
|
err = ubifs_tnc_lookup(c, &key, dn);
|
|
if (err == -ENOENT)
|
|
dlen = 0; /* Not found (so it is a hole) */
|
|
else if (err)
|
|
goto out_free;
|
|
else {
|
|
int dn_len = le32_to_cpu(dn->size);
|
|
|
|
if (dn_len <= 0 || dn_len > UBIFS_BLOCK_SIZE) {
|
|
ubifs_err(c, "bad data node (block %u, inode %lu)",
|
|
blk, inode->i_ino);
|
|
ubifs_dump_node(c, dn, sz - UBIFS_INO_NODE_SZ -
|
|
UBIFS_TRUN_NODE_SZ);
|
|
goto out_free;
|
|
}
|
|
|
|
if (dn_len <= dlen)
|
|
dlen = 0; /* Nothing to do */
|
|
else {
|
|
err = truncate_data_node(c, inode, blk, dn, &dlen);
|
|
if (err)
|
|
goto out_free;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Must make reservation before allocating sequence numbers */
|
|
len = UBIFS_TRUN_NODE_SZ + UBIFS_INO_NODE_SZ;
|
|
|
|
if (ubifs_authenticated(c))
|
|
len += ALIGN(dlen, 8) + ubifs_auth_node_sz(c);
|
|
else
|
|
len += dlen;
|
|
|
|
err = make_reservation(c, BASEHD, len);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
pack_inode(c, ino, inode, 0);
|
|
err = ubifs_node_calc_hash(c, ino, hash_ino);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
ubifs_prep_grp_node(c, trun, UBIFS_TRUN_NODE_SZ, dlen ? 0 : 1);
|
|
if (dlen) {
|
|
ubifs_prep_grp_node(c, dn, dlen, 1);
|
|
err = ubifs_node_calc_hash(c, dn, hash_dn);
|
|
if (err)
|
|
goto out_release;
|
|
}
|
|
|
|
err = write_head(c, BASEHD, ino, len, &lnum, &offs, sync);
|
|
if (err)
|
|
goto out_release;
|
|
if (!sync)
|
|
ubifs_wbuf_add_ino_nolock(&c->jheads[BASEHD].wbuf, inum);
|
|
release_head(c, BASEHD);
|
|
|
|
ubifs_add_auth_dirt(c, lnum);
|
|
|
|
if (dlen) {
|
|
sz = offs + UBIFS_INO_NODE_SZ + UBIFS_TRUN_NODE_SZ;
|
|
err = ubifs_tnc_add(c, &key, lnum, sz, dlen, hash_dn);
|
|
if (err)
|
|
goto out_ro;
|
|
}
|
|
|
|
ino_key_init(c, &key, inum);
|
|
err = ubifs_tnc_add(c, &key, lnum, offs, UBIFS_INO_NODE_SZ, hash_ino);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
err = ubifs_add_dirt(c, lnum, UBIFS_TRUN_NODE_SZ);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
bit = new_size & (UBIFS_BLOCK_SIZE - 1);
|
|
blk = (new_size >> UBIFS_BLOCK_SHIFT) + (bit ? 1 : 0);
|
|
data_key_init(c, &key, inum, blk);
|
|
|
|
bit = old_size & (UBIFS_BLOCK_SIZE - 1);
|
|
blk = (old_size >> UBIFS_BLOCK_SHIFT) - (bit ? 0 : 1);
|
|
data_key_init(c, &to_key, inum, blk);
|
|
|
|
err = ubifs_tnc_remove_range(c, &key, &to_key);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
finish_reservation(c);
|
|
spin_lock(&ui->ui_lock);
|
|
ui->synced_i_size = ui->ui_size;
|
|
spin_unlock(&ui->ui_lock);
|
|
mark_inode_clean(c, ui);
|
|
kfree(ino);
|
|
return 0;
|
|
|
|
out_release:
|
|
release_head(c, BASEHD);
|
|
out_ro:
|
|
ubifs_ro_mode(c, err);
|
|
finish_reservation(c);
|
|
out_free:
|
|
kfree(ino);
|
|
return err;
|
|
}
|
|
|
|
|
|
/**
|
|
* ubifs_jnl_delete_xattr - delete an extended attribute.
|
|
* @c: UBIFS file-system description object
|
|
* @host: host inode
|
|
* @inode: extended attribute inode
|
|
* @nm: extended attribute entry name
|
|
*
|
|
* This function delete an extended attribute which is very similar to
|
|
* un-linking regular files - it writes a deletion xentry, a deletion inode and
|
|
* updates the target inode. Returns zero in case of success and a negative
|
|
* error code in case of failure.
|
|
*/
|
|
int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host,
|
|
const struct inode *inode,
|
|
const struct fscrypt_name *nm)
|
|
{
|
|
int err, xlen, hlen, len, lnum, xent_offs, aligned_xlen, write_len;
|
|
struct ubifs_dent_node *xent;
|
|
struct ubifs_ino_node *ino;
|
|
union ubifs_key xent_key, key1, key2;
|
|
int sync = IS_DIRSYNC(host);
|
|
struct ubifs_inode *host_ui = ubifs_inode(host);
|
|
u8 hash[UBIFS_HASH_ARR_SZ];
|
|
|
|
ubifs_assert(c, inode->i_nlink == 0);
|
|
ubifs_assert(c, mutex_is_locked(&host_ui->ui_mutex));
|
|
|
|
/*
|
|
* Since we are deleting the inode, we do not bother to attach any data
|
|
* to it and assume its length is %UBIFS_INO_NODE_SZ.
|
|
*/
|
|
xlen = UBIFS_DENT_NODE_SZ + fname_len(nm) + 1;
|
|
aligned_xlen = ALIGN(xlen, 8);
|
|
hlen = host_ui->data_len + UBIFS_INO_NODE_SZ;
|
|
len = aligned_xlen + UBIFS_INO_NODE_SZ + ALIGN(hlen, 8);
|
|
|
|
write_len = len + ubifs_auth_node_sz(c);
|
|
|
|
xent = kzalloc(write_len, GFP_NOFS);
|
|
if (!xent)
|
|
return -ENOMEM;
|
|
|
|
/* Make reservation before allocating sequence numbers */
|
|
err = make_reservation(c, BASEHD, write_len);
|
|
if (err) {
|
|
kfree(xent);
|
|
return err;
|
|
}
|
|
|
|
xent->ch.node_type = UBIFS_XENT_NODE;
|
|
xent_key_init(c, &xent_key, host->i_ino, nm);
|
|
key_write(c, &xent_key, xent->key);
|
|
xent->inum = 0;
|
|
xent->type = get_dent_type(inode->i_mode);
|
|
xent->nlen = cpu_to_le16(fname_len(nm));
|
|
memcpy(xent->name, fname_name(nm), fname_len(nm));
|
|
xent->name[fname_len(nm)] = '\0';
|
|
zero_dent_node_unused(xent);
|
|
ubifs_prep_grp_node(c, xent, xlen, 0);
|
|
|
|
ino = (void *)xent + aligned_xlen;
|
|
pack_inode(c, ino, inode, 0);
|
|
ino = (void *)ino + UBIFS_INO_NODE_SZ;
|
|
pack_inode(c, ino, host, 1);
|
|
err = ubifs_node_calc_hash(c, ino, hash);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
err = write_head(c, BASEHD, xent, write_len, &lnum, &xent_offs, sync);
|
|
if (!sync && !err)
|
|
ubifs_wbuf_add_ino_nolock(&c->jheads[BASEHD].wbuf, host->i_ino);
|
|
release_head(c, BASEHD);
|
|
|
|
ubifs_add_auth_dirt(c, lnum);
|
|
kfree(xent);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
/* Remove the extended attribute entry from TNC */
|
|
err = ubifs_tnc_remove_nm(c, &xent_key, nm);
|
|
if (err)
|
|
goto out_ro;
|
|
err = ubifs_add_dirt(c, lnum, xlen);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
/*
|
|
* Remove all nodes belonging to the extended attribute inode from TNC.
|
|
* Well, there actually must be only one node - the inode itself.
|
|
*/
|
|
lowest_ino_key(c, &key1, inode->i_ino);
|
|
highest_ino_key(c, &key2, inode->i_ino);
|
|
err = ubifs_tnc_remove_range(c, &key1, &key2);
|
|
if (err)
|
|
goto out_ro;
|
|
err = ubifs_add_dirt(c, lnum, UBIFS_INO_NODE_SZ);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
/* And update TNC with the new host inode position */
|
|
ino_key_init(c, &key1, host->i_ino);
|
|
err = ubifs_tnc_add(c, &key1, lnum, xent_offs + len - hlen, hlen, hash);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
finish_reservation(c);
|
|
spin_lock(&host_ui->ui_lock);
|
|
host_ui->synced_i_size = host_ui->ui_size;
|
|
spin_unlock(&host_ui->ui_lock);
|
|
mark_inode_clean(c, host_ui);
|
|
return 0;
|
|
|
|
out_release:
|
|
kfree(xent);
|
|
release_head(c, BASEHD);
|
|
out_ro:
|
|
ubifs_ro_mode(c, err);
|
|
finish_reservation(c);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ubifs_jnl_change_xattr - change an extended attribute.
|
|
* @c: UBIFS file-system description object
|
|
* @inode: extended attribute inode
|
|
* @host: host inode
|
|
*
|
|
* This function writes the updated version of an extended attribute inode and
|
|
* the host inode to the journal (to the base head). The host inode is written
|
|
* after the extended attribute inode in order to guarantee that the extended
|
|
* attribute will be flushed when the inode is synchronized by 'fsync()' and
|
|
* consequently, the write-buffer is synchronized. This function returns zero
|
|
* in case of success and a negative error code in case of failure.
|
|
*/
|
|
int ubifs_jnl_change_xattr(struct ubifs_info *c, const struct inode *inode,
|
|
const struct inode *host)
|
|
{
|
|
int err, len1, len2, aligned_len, aligned_len1, lnum, offs;
|
|
struct ubifs_inode *host_ui = ubifs_inode(host);
|
|
struct ubifs_ino_node *ino;
|
|
union ubifs_key key;
|
|
int sync = IS_DIRSYNC(host);
|
|
u8 hash_host[UBIFS_HASH_ARR_SZ];
|
|
u8 hash[UBIFS_HASH_ARR_SZ];
|
|
|
|
dbg_jnl("ino %lu, ino %lu", host->i_ino, inode->i_ino);
|
|
ubifs_assert(c, inode->i_nlink > 0);
|
|
ubifs_assert(c, mutex_is_locked(&host_ui->ui_mutex));
|
|
|
|
len1 = UBIFS_INO_NODE_SZ + host_ui->data_len;
|
|
len2 = UBIFS_INO_NODE_SZ + ubifs_inode(inode)->data_len;
|
|
aligned_len1 = ALIGN(len1, 8);
|
|
aligned_len = aligned_len1 + ALIGN(len2, 8);
|
|
|
|
aligned_len += ubifs_auth_node_sz(c);
|
|
|
|
ino = kzalloc(aligned_len, GFP_NOFS);
|
|
if (!ino)
|
|
return -ENOMEM;
|
|
|
|
/* Make reservation before allocating sequence numbers */
|
|
err = make_reservation(c, BASEHD, aligned_len);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
pack_inode(c, ino, host, 0);
|
|
err = ubifs_node_calc_hash(c, ino, hash_host);
|
|
if (err)
|
|
goto out_release;
|
|
pack_inode(c, (void *)ino + aligned_len1, inode, 1);
|
|
err = ubifs_node_calc_hash(c, (void *)ino + aligned_len1, hash);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
err = write_head(c, BASEHD, ino, aligned_len, &lnum, &offs, 0);
|
|
if (!sync && !err) {
|
|
struct ubifs_wbuf *wbuf = &c->jheads[BASEHD].wbuf;
|
|
|
|
ubifs_wbuf_add_ino_nolock(wbuf, host->i_ino);
|
|
ubifs_wbuf_add_ino_nolock(wbuf, inode->i_ino);
|
|
}
|
|
release_head(c, BASEHD);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
ubifs_add_auth_dirt(c, lnum);
|
|
|
|
ino_key_init(c, &key, host->i_ino);
|
|
err = ubifs_tnc_add(c, &key, lnum, offs, len1, hash_host);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
ino_key_init(c, &key, inode->i_ino);
|
|
err = ubifs_tnc_add(c, &key, lnum, offs + aligned_len1, len2, hash);
|
|
if (err)
|
|
goto out_ro;
|
|
|
|
finish_reservation(c);
|
|
spin_lock(&host_ui->ui_lock);
|
|
host_ui->synced_i_size = host_ui->ui_size;
|
|
spin_unlock(&host_ui->ui_lock);
|
|
mark_inode_clean(c, host_ui);
|
|
kfree(ino);
|
|
return 0;
|
|
|
|
out_release:
|
|
release_head(c, BASEHD);
|
|
out_ro:
|
|
ubifs_ro_mode(c, err);
|
|
finish_reservation(c);
|
|
out_free:
|
|
kfree(ino);
|
|
return err;
|
|
}
|
|
|