ff44e2dbb4
Add ext4_jbd2.c to the build and provide the necessary stubs. To avoid build warnings while we build out the required interfacing, start a new stub.c file containing empty functions. Changes to ext4_jbd2.c: - Remove trace/events/ext4.h include (not needed) - Stub out ext4_check_bdev_write_error() since U-Boot lacks async I/O error tracking - Add return after BUG() to silence non-void function warning Changes to ext4_jbd2.h: - Include ext4_uboot.h instead of linux/fs.h Changes to ext4_uboot.h: - Add sb_writers struct and SB_FREEZE constants - Add _RET_IP_ macro - Add mapping_large_folio_support() stub - Add WARN_ON_ONCE/WARN_ON as proper stubs - Add BUG(), might_sleep(), sb_rdonly() stubs - Add trace function stubs - Add buffer operation stubs (wait_on_buffer, mark_buffer_dirty, etc.) - Add inode_needs_sync stub - Include linux/sched.h for current task Changes to include/linux/buffer_head.h: - Add inline bh_*_bit functions for buffer state management - Use bh_ prefixed functions in BUFFER_FNS/TAS_BUFFER_FNS macros Changes to include/linux/fs.h: - Add bd_disk to block_device struct Changes to include/linux/workqueue.h: - Fix flush_work macro to avoid unused value warning Add stub functions to interface.c for jbd2 journal functions: - jbd2__journal_start, jbd2_journal_stop - jbd2_journal_free_reserved, jbd2_journal_start_reserved - jbd2_journal_extend, jbd2_journal_get_write_access - jbd2_journal_set_triggers, jbd2_journal_forget - jbd2_journal_revoke, jbd2_journal_get_create_access - jbd2_journal_dirty_metadata - __ext4_error, __ext4_std_error, ext4_decode_error Keep full Linux jbd2.h with compatibility header includes. Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com>
100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/ext4/bitmap.c
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*/
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#include "ext4_uboot.h"
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#include "ext4.h"
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unsigned int ext4_count_free(char *bitmap, unsigned int numchars)
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{
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return numchars * BITS_PER_BYTE - memweight(bitmap, numchars);
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}
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int ext4_inode_bitmap_csum_verify(struct super_block *sb,
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struct ext4_group_desc *gdp,
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struct buffer_head *bh)
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{
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__u32 hi;
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__u32 provided, calculated;
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struct ext4_sb_info *sbi = EXT4_SB(sb);
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int sz;
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if (!ext4_has_feature_metadata_csum(sb))
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return 1;
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sz = EXT4_INODES_PER_GROUP(sb) >> 3;
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provided = le16_to_cpu(gdp->bg_inode_bitmap_csum_lo);
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calculated = ext4_chksum(sbi->s_csum_seed, (__u8 *)bh->b_data, sz);
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if (sbi->s_desc_size >= EXT4_BG_INODE_BITMAP_CSUM_HI_END) {
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hi = le16_to_cpu(gdp->bg_inode_bitmap_csum_hi);
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provided |= (hi << 16);
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} else
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calculated &= 0xFFFF;
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return provided == calculated;
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}
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void ext4_inode_bitmap_csum_set(struct super_block *sb,
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struct ext4_group_desc *gdp,
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struct buffer_head *bh)
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{
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__u32 csum;
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struct ext4_sb_info *sbi = EXT4_SB(sb);
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int sz;
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if (!ext4_has_feature_metadata_csum(sb))
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return;
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sz = EXT4_INODES_PER_GROUP(sb) >> 3;
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csum = ext4_chksum(sbi->s_csum_seed, (__u8 *)bh->b_data, sz);
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gdp->bg_inode_bitmap_csum_lo = cpu_to_le16(csum & 0xFFFF);
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if (sbi->s_desc_size >= EXT4_BG_INODE_BITMAP_CSUM_HI_END)
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gdp->bg_inode_bitmap_csum_hi = cpu_to_le16(csum >> 16);
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}
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int ext4_block_bitmap_csum_verify(struct super_block *sb,
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struct ext4_group_desc *gdp,
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struct buffer_head *bh)
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{
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__u32 hi;
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__u32 provided, calculated;
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struct ext4_sb_info *sbi = EXT4_SB(sb);
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int sz = EXT4_CLUSTERS_PER_GROUP(sb) / 8;
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if (!ext4_has_feature_metadata_csum(sb))
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return 1;
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provided = le16_to_cpu(gdp->bg_block_bitmap_csum_lo);
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calculated = ext4_chksum(sbi->s_csum_seed, (__u8 *)bh->b_data, sz);
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if (sbi->s_desc_size >= EXT4_BG_BLOCK_BITMAP_CSUM_HI_END) {
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hi = le16_to_cpu(gdp->bg_block_bitmap_csum_hi);
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provided |= (hi << 16);
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} else
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calculated &= 0xFFFF;
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return provided == calculated;
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}
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void ext4_block_bitmap_csum_set(struct super_block *sb,
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struct ext4_group_desc *gdp,
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struct buffer_head *bh)
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{
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int sz = EXT4_CLUSTERS_PER_GROUP(sb) / 8;
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__u32 csum;
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struct ext4_sb_info *sbi = EXT4_SB(sb);
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if (!ext4_has_feature_metadata_csum(sb))
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return;
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csum = ext4_chksum(sbi->s_csum_seed, (__u8 *)bh->b_data, sz);
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gdp->bg_block_bitmap_csum_lo = cpu_to_le16(csum & 0xFFFF);
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if (sbi->s_desc_size >= EXT4_BG_BLOCK_BITMAP_CSUM_HI_END)
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gdp->bg_block_bitmap_csum_hi = cpu_to_le16(csum >> 16);
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}
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