--- /dev/null
- (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT ?
- (__u64)inode->osd2.linux2.l_i_blocks_hi << 32 : 0)) -
+/*
+ * blknum.c --- Functions to handle blk64_t and high/low 64-bit block
+ * number.
+ *
+ * Copyright IBM Corporation, 2007
+ * Author Jose R. Santos <jrs@us.ibm.com>
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include "ext2fs.h"
+
+/*
+ * Return the group # of a block
+ */
+dgrp_t ext2fs_group_of_blk2(ext2_filsys fs, blk64_t blk)
+{
+ return (blk - fs->super->s_first_data_block) /
+ fs->super->s_blocks_per_group;
+}
+
+/*
+ * Return the first block (inclusive) in a group
+ */
+blk64_t ext2fs_group_first_block2(ext2_filsys fs, dgrp_t group)
+{
+ return fs->super->s_first_data_block +
+ ((blk64_t)group * fs->super->s_blocks_per_group);
+}
+
+/*
+ * Return the last block (inclusive) in a group
+ */
+blk64_t ext2fs_group_last_block2(ext2_filsys fs, dgrp_t group)
+{
+ return (group == fs->group_desc_count - 1 ?
+ ext2fs_blocks_count(fs->super) - 1 :
+ ext2fs_group_first_block2(fs, group) +
+ (fs->super->s_blocks_per_group - 1));
+}
+
+/*
+ * Return the inode data block count
+ */
+blk64_t ext2fs_inode_data_blocks2(ext2_filsys fs,
+ struct ext2_inode *inode)
+{
+ return (inode->i_blocks |
- (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT ?
++ ((fs->super->s_feature_incompat &
++ EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ?
++ (__u64) inode->osd2.linux2.l_i_blocks_hi << 32 : 0)) -
+ (inode->i_file_acl ? fs->blocksize >> 9 : 0);
+}
+
+/*
+ * Return the inode i_blocks count
+ */
+blk64_t ext2fs_inode_i_blocks(ext2_filsys fs,
+ struct ext2_inode *inode)
+{
+ return (inode->i_blocks |
++ ((fs->super->s_feature_incompat &
++ EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ?
+ (__u64)inode->osd2.linux2.l_i_blocks_hi << 32 : 0));
+}
+
+/*
+ * Return the fs block count
+ */
+blk64_t ext2fs_blocks_count(struct ext2_super_block *super)
+{
+ return super->s_blocks_count |
+ (super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT ?
+ (__u64) super->s_blocks_count_hi << 32 : 0);
+}
+
+/*
+ * Set the fs block count
+ */
+void ext2fs_blocks_count_set(struct ext2_super_block *super, blk64_t blk)
+{
+ super->s_blocks_count = blk;
+ if (super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ super->s_blocks_count_hi = (__u64) blk >> 32;
+}
+
+/*
+ * Add to the current fs block count
+ */
+void ext2fs_blocks_count_add(struct ext2_super_block *super, blk64_t blk)
+{
+ blk64_t tmp;
+ tmp = ext2fs_blocks_count(super) + blk;
+ ext2fs_blocks_count_set(super, tmp);
+}
+
+/*
+ * Return the fs reserved block count
+ */
+blk64_t ext2fs_r_blocks_count(struct ext2_super_block *super)
+{
+ return super->s_r_blocks_count |
+ (super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT ?
+ (__u64) super->s_r_blocks_count_hi << 32 : 0);
+}
+
+/*
+ * Set the fs reserved block count
+ */
+void ext2fs_r_blocks_count_set(struct ext2_super_block *super, blk64_t blk)
+{
+ super->s_r_blocks_count = blk;
+ if (super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ super->s_r_blocks_count_hi = (__u64) blk >> 32;
+}
+
+/*
+ * Add to the current reserved fs block count
+ */
+void ext2fs_r_blocks_count_add(struct ext2_super_block *super, blk64_t blk)
+{
+ blk64_t tmp;
+ tmp = ext2fs_r_blocks_count(super) + blk;
+ ext2fs_r_blocks_count_set(super, tmp);
+}
+
+/*
+ * Return the fs free block count
+ */
+blk64_t ext2fs_free_blocks_count(struct ext2_super_block *super)
+{
+ return super->s_free_blocks_count |
+ (super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT ?
+ (__u64) super->s_free_blocks_hi << 32 : 0);
+}
+
+/*
+ * Set the fs free block count
+ */
+void ext2fs_free_blocks_count_set(struct ext2_super_block *super, blk64_t blk)
+{
+ super->s_free_blocks_count = blk;
+ if (super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ super->s_free_blocks_hi = (__u64) blk >> 32;
+}
+
+/*
+ * Add to the current free fs block count
+ */
+void ext2fs_free_blocks_count_add(struct ext2_super_block *super, blk64_t blk)
+{
+ blk64_t tmp;
+ tmp = ext2fs_free_blocks_count(super) + blk;
+ ext2fs_free_blocks_count_set(super, tmp);
+}
+
+/*
+ * Get a pointer to a block group descriptor. We need the explicit
+ * pointer to the group desc for code that swaps block group
+ * descriptors before writing them out, as it wants to make a copy and
+ * do the swap there.
+ */
+struct ext2_group_desc *ext2fs_group_desc(ext2_filsys fs,
+ struct ext2_group_desc *gdp,
+ dgrp_t group)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT)
+ return (struct ext2_group_desc *)
+ ((struct ext4_group_desc *) gdp + group);
+ else
+ return (struct ext2_group_desc *) gdp + group;
+}
+
+/*
+ * Return the block bitmap block of a group
+ */
+blk64_t ext2fs_block_bitmap_loc(ext2_filsys fs, dgrp_t group)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ return gdp->bg_block_bitmap |
+ (fs->super->s_feature_incompat
+ & EXT4_FEATURE_INCOMPAT_64BIT ?
+ (__u64) gdp->bg_block_bitmap_hi << 32 : 0);
+ }
+
+ return fs->group_desc[group].bg_block_bitmap;
+}
+
+/*
+ * Set the block bitmap block of a group
+ */
+void ext2fs_block_bitmap_loc_set(ext2_filsys fs, dgrp_t group, blk64_t blk)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+ gdp->bg_block_bitmap = blk;
+ if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ gdp->bg_block_bitmap_hi = (__u64) blk >> 32;
+ } else
+ fs->group_desc[group].bg_block_bitmap = blk;
+}
+
+/*
+ * Return the inode bitmap block of a group
+ */
+blk64_t ext2fs_inode_bitmap_loc(ext2_filsys fs, dgrp_t group)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ return gdp->bg_inode_bitmap |
+ (fs->super->s_feature_incompat
+ & EXT4_FEATURE_INCOMPAT_64BIT ?
+ (__u64) gdp->bg_inode_bitmap_hi << 32 : 0);
+ }
+
+ return fs->group_desc[group].bg_inode_bitmap;
+}
+
+/*
+ * Set the inode bitmap block of a group
+ */
+void ext2fs_inode_bitmap_loc_set(ext2_filsys fs, dgrp_t group, blk64_t blk)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+ gdp->bg_inode_bitmap = blk;
+ if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ gdp->bg_inode_bitmap_hi = (__u64) blk >> 32;
+ } else
+ fs->group_desc[group].bg_inode_bitmap = blk;
+}
+
+/*
+ * Return the inode table block of a group
+ */
+blk64_t ext2fs_inode_table_loc(ext2_filsys fs, dgrp_t group)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ return gdp->bg_inode_table |
+ (fs->super->s_feature_incompat
+ & EXT4_FEATURE_INCOMPAT_64BIT ?
+ (__u64) gdp->bg_inode_table_hi << 32 : 0);
+ }
+
+ return fs->group_desc[group].bg_inode_table;
+}
+
+/*
+ * Set the inode table block of a group
+ */
+void ext2fs_inode_table_loc_set(ext2_filsys fs, dgrp_t group, blk64_t blk)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+ gdp->bg_inode_table = blk;
+ if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ gdp->bg_inode_table_hi = (__u64) blk >> 32;
+ } else
+ fs->group_desc[group].bg_inode_table = blk;
+}
+
+/*
+ * Return the free blocks count of a group
+ */
+__u32 ext2fs_bg_free_blocks_count(ext2_filsys fs, dgrp_t group)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ return gdp->bg_free_blocks_count |
+ (fs->super->s_feature_incompat
+ & EXT4_FEATURE_INCOMPAT_64BIT ?
+ (__u32) gdp->bg_free_blocks_count_hi << 16 : 0);
+ }
+
+ return fs->group_desc[group].bg_free_blocks_count;
+}
+
+/*
+ * Set the free blocks count of a group
+ */
+void ext2fs_bg_free_blocks_count_set(ext2_filsys fs, dgrp_t group, __u32 n)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+ gdp->bg_free_blocks_count = n;
+ if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ gdp->bg_free_blocks_count_hi = (__u32) n >> 16;
+ } else
+ fs->group_desc[group].bg_free_blocks_count = n;
+}
+
+/*
+ * Return the free inodes count of a group
+ */
+__u32 ext2fs_bg_free_inodes_count(ext2_filsys fs, dgrp_t group)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ return gdp->bg_free_inodes_count |
+ (fs->super->s_feature_incompat
+ & EXT4_FEATURE_INCOMPAT_64BIT ?
+ (__u32) gdp->bg_free_inodes_count_hi << 16 : 0);
+ }
+
+ return fs->group_desc[group].bg_free_inodes_count;
+}
+
+/*
+ * Set the free inodes count of a group
+ */
+void ext2fs_bg_free_inodes_count_set(ext2_filsys fs, dgrp_t group, __u32 n)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+ gdp->bg_free_inodes_count = n;
+ if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ gdp->bg_free_inodes_count_hi = (__u32) n >> 16;
+ } else
+ fs->group_desc[group].bg_free_inodes_count = n;
+}
+
+/*
+ * Return the used dirs count of a group
+ */
+__u32 ext2fs_bg_used_dirs_count(ext2_filsys fs, dgrp_t group)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ return gdp->bg_used_dirs_count |
+ (fs->super->s_feature_incompat
+ & EXT4_FEATURE_INCOMPAT_64BIT ?
+ (__u32) gdp->bg_used_dirs_count_hi << 16 : 0);
+ }
+
+ return fs->group_desc[group].bg_used_dirs_count;
+}
+
+/*
+ * Set the used dirs count of a group
+ */
+void ext2fs_bg_used_dirs_count_set(ext2_filsys fs, dgrp_t group, __u32 n)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+ gdp->bg_used_dirs_count = n;
+ if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ gdp->bg_used_dirs_count_hi = (__u32) n >> 16;
+ } else
+ fs->group_desc[group].bg_used_dirs_count = n;
+}
+
+/*
+ * Return the unused inodes count of a group
+ */
+__u32 ext2fs_bg_itable_unused(ext2_filsys fs, dgrp_t group)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ return gdp->bg_itable_unused |
+ (fs->super->s_feature_incompat
+ & EXT4_FEATURE_INCOMPAT_64BIT ?
+ (__u32) gdp->bg_itable_unused_hi << 16 : 0);
+ }
+
+ return fs->group_desc[group].bg_itable_unused;
+}
+
+/*
+ * Set the unused inodes count of a group
+ */
+void ext2fs_bg_itable_unused_set(ext2_filsys fs, dgrp_t group, __u32 n)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+ gdp->bg_itable_unused = n;
+ if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ gdp->bg_itable_unused_hi = (__u32) n >> 16;
+ } else
+ fs->group_desc[group].bg_itable_unused = n;
+}
+
+/*
+ * Get the flags for this block group
+ */
+__u16 ext2fs_bg_flags(ext2_filsys fs, dgrp_t group)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ return gdp->bg_flags;
+ }
+
+ return fs->group_desc[group].bg_flags;
+}
+
+/*
+ * Set the flags for this block group
+ */
+void ext2fs_bg_flags_set(ext2_filsys fs, dgrp_t group, __u16 bg_flags)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ gdp->bg_flags = bg_flags;
+ return;
+ }
+
+ fs->group_desc[group].bg_flags = bg_flags;
+}
+
+/*
+ * Clear the flags for this block group
+ */
+void ext2fs_bg_flags_clear(ext2_filsys fs, dgrp_t group, __u16 bg_flags)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ gdp->bg_flags = 0;
+ return;
+ }
+
+ fs->group_desc[group].bg_flags = 0;
+}
+
+/*
+ * Get the value of a particular flag for this block group
+ */
+int ext2fs_bg_flag_test(ext2_filsys fs, dgrp_t group, __u16 bg_flag)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ return gdp->bg_flags & bg_flag;
+ }
+
+ return fs->group_desc[group].bg_flags & bg_flag;
+}
+
+/*
+ * Set a particular flag for this block group
+ */
+void ext2fs_bg_flag_set(ext2_filsys fs, dgrp_t group, __u16 bg_flag)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ gdp->bg_flags |= bg_flag;
+ return;
+ }
+
+ fs->group_desc[group].bg_flags |= bg_flag;
+}
+
+/*
+ * Clear a particular flag for this block group
+ */
+void ext2fs_bg_flag_clear(ext2_filsys fs, dgrp_t group, __u16 bg_flag)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ gdp->bg_flags &= ~bg_flag;
+ return;
+ }
+
+ fs->group_desc[group].bg_flags &= ~bg_flag;
+}
+
+/*
+ * Get the checksum for this block group
+ */
+__u16 ext2fs_bg_checksum(ext2_filsys fs, dgrp_t group)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ return gdp->bg_checksum;
+ }
+
+ return fs->group_desc[group].bg_checksum;
+}
+
+/*
+ * Set the checksum for this block group to a previously calculated value
+ */
+void ext2fs_bg_checksum_set(ext2_filsys fs, dgrp_t group, __u16 checksum)
+{
+ if (fs->super->s_desc_size >= EXT2_MIN_DESC_SIZE_64BIT) {
+ struct ext4_group_desc *gdp;
+ gdp = (struct ext4_group_desc *) (fs->group_desc) + group;
+
+ gdp->bg_checksum = checksum;
+ return;
+ }
+
+ fs->group_desc[group].bg_checksum = checksum;
+}
+
+/*
+ * Get the acl block of a file
+ *
+ * XXX Ignoring 64-bit file system flag - most places where this is
+ * called don't have access to the fs struct, and the high bits should
+ * be 0 in the non-64-bit case anyway.
+ */
+blk64_t ext2fs_file_acl_block(const struct ext2_inode *inode)
+{
+ return (inode->i_file_acl |
+ (__u64) inode->osd2.linux2.l_i_file_acl_high << 32);
+}
+
+/*
+ * Set the acl block of a file
+ */
+void ext2fs_file_acl_block_set(struct ext2_inode *inode, blk64_t blk)
+{
+ inode->i_file_acl = blk;
+ inode->osd2.linux2.l_i_file_acl_high = (__u64) blk >> 32;
+}
+
git://git.whamcloud.com / tools / e2fsprogs.git / commitdiff