sphinx.addnodesdocument)}( rawsourcechildren]( translations LanguagesNode)}(hhh](h pending_xref)}(hhh]docutils.nodesTextChinese (Simplified)}parenthsba attributes}(ids]classes]names]dupnames]backrefs] refdomainstdreftypedoc reftarget0/translations/zh_CN/filesystems/ext4/group_descrmodnameN classnameN refexplicitutagnamehhh ubh)}(hhh]hChinese (Traditional)}hh2sbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget0/translations/zh_TW/filesystems/ext4/group_descrmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hItalian}hhFsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget0/translations/it_IT/filesystems/ext4/group_descrmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hJapanese}hhZsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget0/translations/ja_JP/filesystems/ext4/group_descrmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hKorean}hhnsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget0/translations/ko_KR/filesystems/ext4/group_descrmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hSpanish}hhsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget0/translations/sp_SP/filesystems/ext4/group_descrmodnameN classnameN refexplicituh1hhh ubeh}(h]h ]h"]h$]h&]current_languageEnglishuh1h hh _documenthsourceNlineNubhcomment)}(h SPDX-License-Identifier: GPL-2.0h]h SPDX-License-Identifier: GPL-2.0}hhsbah}(h]h ]h"]h$]h&] xml:spacepreserveuh1hhhhhhJ/var/lib/git/docbuild/linux/Documentation/filesystems/ext4/group_descr.rsthKubhsection)}(hhh](htitle)}(hBlock Group Descriptorsh]hBlock Group Descriptors}(hhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhhhhhKubh paragraph)}(hX_Each block group on the filesystem has one of these descriptors associated with it. As noted in the Layout section above, the group descriptors (if present) are the second item in the block group. The standard configuration is for each block group to contain a full copy of the block group descriptor table unless the sparse_super feature flag is set.h]hX_Each block group on the filesystem has one of these descriptors associated with it. As noted in the Layout section above, the group descriptors (if present) are the second item in the block group. The standard configuration is for each block group to contain a full copy of the block group descriptor table unless the sparse_super feature flag is set.}(hhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hXNotice how the group descriptor records the location of both bitmaps and the inode table (i.e. they can float). This means that within a block group, the only data structures with fixed locations are the superblock and the group descriptor table. The flex_bg mechanism uses this property to group several block groups into a flex group and lay out all of the groups' bitmaps and inode tables into one long run in the first group of the flex group.h]hXNotice how the group descriptor records the location of both bitmaps and the inode table (i.e. they can float). This means that within a block group, the only data structures with fixed locations are the superblock and the group descriptor table. The flex_bg mechanism uses this property to group several block groups into a flex group and lay out all of the groups’ bitmaps and inode tables into one long run in the first group of the flex group.}(hhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK hhhhubh)}(hXIf the meta_bg feature flag is set, then several block groups are grouped together into a meta group. Note that in the meta_bg case, however, the first and last two block groups within the larger meta group contain only group descriptors for the groups inside the meta group.h]hXIf the meta_bg feature flag is set, then several block groups are grouped together into a meta group. Note that in the meta_bg case, however, the first and last two block groups within the larger meta group contain only group descriptors for the groups inside the meta group.}(hhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hDflex_bg and meta_bg do not appear to be mutually exclusive features.h]hDflex_bg and meta_bg do not appear to be mutually exclusive features.}(hhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hX>In ext2, ext3, and ext4 (when the 64bit feature is not enabled), the block group descriptor was only 32 bytes long and therefore ends at bg_checksum. On an ext4 filesystem with the 64bit feature enabled, the block group descriptor expands to at least the 64 bytes described below; the size is stored in the superblock.h]hX>In ext2, ext3, and ext4 (when the 64bit feature is not enabled), the block group descriptor was only 32 bytes long and therefore ends at bg_checksum. On an ext4 filesystem with the 64bit feature enabled, the block group descriptor expands to at least the 64 bytes described below; the size is stored in the superblock.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hXIf gdt_csum is set and metadata_csum is not set, the block group checksum is the crc16 of the FS UUID, the group number, and the group descriptor structure. If metadata_csum is set, then the block group checksum is the lower 16 bits of the checksum of the FS UUID, the group number, and the group descriptor structure. Both block and inode bitmap checksums are calculated against the FS UUID, the group number, and the entire bitmap.h]hXIf gdt_csum is set and metadata_csum is not set, the block group checksum is the crc16 of the FS UUID, the group number, and the group descriptor structure. If metadata_csum is set, then the block group checksum is the lower 16 bits of the checksum of the FS UUID, the group number, and the group descriptor structure. Both block and inode bitmap checksums are calculated against the FS UUID, the group number, and the entire bitmap.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK#hhhhubh)}(hEThe block group descriptor is laid out in ``struct ext4_group_desc``.h](h*The block group descriptor is laid out in }(hjhhhNhNubhliteral)}(h``struct ext4_group_desc``h]hstruct ext4_group_desc}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1j'hjubh.}(hjhhhNhNubeh}(h]h ]h"]h$]h&]uh1hhhhK+hhhhubhtable)}(hhh]htgroup)}(hhh](hcolspec)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jKhjHubjL)}(hhh]h}(h]h ]h"]h$]h&]jVKuh1jKhjHubjL)}(hhh]h}(h]h ]h"]h$]h&]jVKuh1jKhjHubjL)}(hhh]h}(h]h ]h"]h$]h&]jVK(uh1jKhjHubhthead)}(hhh]hrow)}(hhh](hentry)}(hhh]h)}(hOffseth]hOffset}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK1hj~ubah}(h]h ]h"]h$]h&]uh1j|hjyubj})}(hhh]h)}(hSizeh]hSize}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK2hjubah}(h]h ]h"]h$]h&]uh1j|hjyubj})}(hhh]h)}(hNameh]hName}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK3hjubah}(h]h ]h"]h$]h&]uh1j|hjyubj})}(hhh]h)}(h Descriptionh]h Description}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK4hjubah}(h]h ]h"]h$]h&]uh1j|hjyubeh}(h]h ]h"]h$]h&]uh1jwhjtubah}(h]h ]h"]h$]h&]uh1jrhjHubhtbody)}(hhh](jx)}(hhh](j})}(hhh]h)}(h0x0h]h0x0}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK5hjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h__le32h]h__le32}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK6hjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hbg_block_bitmap_loh]hbg_block_bitmap_lo}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK7hjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h*Lower 32-bits of location of block bitmap.h]h*Lower 32-bits of location of block bitmap.}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK8hj3ubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x4h]h0x4}(hjVhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK9hjSubah}(h]h ]h"]h$]h&]uh1j|hjPubj})}(hhh]h)}(h__le32h]h__le32}(hjmhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK:hjjubah}(h]h ]h"]h$]h&]uh1j|hjPubj})}(hhh]h)}(hbg_inode_bitmap_loh]hbg_inode_bitmap_lo}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK;hjubah}(h]h ]h"]h$]h&]uh1j|hjPubj})}(hhh]h)}(h*Lower 32-bits of location of inode bitmap.h]h*Lower 32-bits of location of inode bitmap.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hbg_inode_table_loh]hbg_inode_table_lo}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK?hjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h)Lower 32-bits of location of inode table.h]h)Lower 32-bits of location of inode table.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK@hjubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0xCh]h0xC}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKAhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h__le16h]h__le16}(hj7hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKBhj4ubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hbg_free_blocks_count_loh]hbg_free_blocks_count_lo}(hjNhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKChjKubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h"Lower 16-bits of free block count.h]h"Lower 16-bits of free block count.}(hjehhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKDhjbubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0xEh]h0xE}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKEhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h__le16h]h__le16}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKFhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hbg_free_inodes_count_loh]hbg_free_inodes_count_lo}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKGhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h"Lower 16-bits of free inode count.h]h"Lower 16-bits of free inode count.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKHhjubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x10h]h0x10}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKIhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h__le16h]h__le16}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKJhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hbg_used_dirs_count_loh]hbg_used_dirs_count_lo}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKKhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h!Lower 16-bits of directory count.h]h!Lower 16-bits of directory count.}(hj/hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKLhj,ubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x12h]h0x12}(hjOhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKMhjLubah}(h]h ]h"]h$]h&]uh1j|hjIubj})}(hhh]h)}(h__le16h]h__le16}(hjfhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKNhjcubah}(h]h ]h"]h$]h&]uh1j|hjIubj})}(hhh]h)}(hbg_flagsh]hbg_flags}(hj}hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKOhjzubah}(h]h ]h"]h$]h&]uh1j|hjIubj})}(hhh]h)}(h0Block group flags. See the bgflags_ table below.h](hBlock group flags. See the }(hjhhhNhNubh reference)}(hbgflags_h]hbgflags}(hjhhhNhNubah}(h]h ]h"]h$]h&]namebgflagsrefidbgflagsuh1jhjresolvedKubh table below.}(hjhhhNhNubeh}(h]h ]h"]h$]h&]uh1hhhhKPhjubah}(h]h ]h"]h$]h&]uh1j|hjIubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x14h]h0x14}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKQhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h__le32h]h__le32}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKRhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hbg_exclude_bitmap_loh]hbg_exclude_bitmap_lo}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKShjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h7Lower 32-bits of location of snapshot exclusion bitmap.h]h7Lower 32-bits of location of snapshot exclusion bitmap.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKThjubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x18h]h0x18}(hj2hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKUhj/ubah}(h]h ]h"]h$]h&]uh1j|hj,ubj})}(hhh]h)}(h__le16h]h__le16}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKVhjFubah}(h]h ]h"]h$]h&]uh1j|hj,ubj})}(hhh]h)}(hbg_block_bitmap_csum_loh]hbg_block_bitmap_csum_lo}(hj`hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKWhj]ubah}(h]h ]h"]h$]h&]uh1j|hj,ubj})}(hhh]h)}(h+Lower 16-bits of the block bitmap checksum.h]h+Lower 16-bits of the block bitmap checksum.}(hjwhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKXhjtubah}(h]h ]h"]h$]h&]uh1j|hj,ubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x1Ah]h0x1A}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKYhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h__le16h]h__le16}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKZhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hbg_inode_bitmap_csum_loh]hbg_inode_bitmap_csum_lo}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK[hjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h+Lower 16-bits of the inode bitmap checksum.h]h+Lower 16-bits of the inode bitmap checksum.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK\hjubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x1Ch]h0x1C}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK]hjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h__le16h]h__le16}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK^hjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hbg_itable_unused_loh]hbg_itable_unused_lo}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK_hj'ubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hLower 16-bits of unused inode count. If set, we needn't scan past the ``(sb.s_inodes_per_group - gdt.bg_itable_unused)`` th entry in the inode table for this group.h](hHLower 16-bits of unused inode count. If set, we needn’t scan past the }(hjAhhhNhNubj()}(h2``(sb.s_inodes_per_group - gdt.bg_itable_unused)``h]h.(sb.s_inodes_per_group - gdt.bg_itable_unused)}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1j'hjAubh, th entry in the inode table for this group.}(hjAhhhNhNubeh}(h]h ]h"]h$]h&]uh1hhhhK`hj>ubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x1Eh]h0x1E}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKchjpubah}(h]h ]h"]h$]h&]uh1j|hjmubj})}(hhh]h)}(h__le16h]h__le16}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKdhjubah}(h]h ]h"]h$]h&]uh1j|hjmubj})}(hhh]h)}(h bg_checksumh]h bg_checksum}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKehjubah}(h]h ]h"]h$]h&]uh1j|hjmubj})}(hhh]h)}(hX<Group descriptor checksum; crc16(sb_uuid+group_num+bg_desc) if the RO_COMPAT_GDT_CSUM feature is set, or crc32c(sb_uuid+group_num+bg_desc) & 0xFFFF if the RO_COMPAT_METADATA_CSUM feature is set. The bg_checksum field in bg_desc is skipped when calculating crc16 checksum, and set to zero if crc32c checksum is used.h]hX<Group descriptor checksum; crc16(sb_uuid+group_num+bg_desc) if the RO_COMPAT_GDT_CSUM feature is set, or crc32c(sb_uuid+group_num+bg_desc) & 0xFFFF if the RO_COMPAT_METADATA_CSUM feature is set. The bg_checksum field in bg_desc is skipped when calculating crc16 checksum, and set to zero if crc32c checksum is used.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKfhjubah}(h]h ]h"]h$]h&]uh1j|hjmubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hMThese fields only exist if the 64bit feature is enabled and s_desc_size > 32.h]hMThese fields only exist if the 64bit feature is enabled and s_desc_size > 32.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKohjubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x20h]h0x20}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKqhjubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h__le32h]h__le32}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKrhj'ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(hbg_block_bitmap_hih]hbg_block_bitmap_hi}(hjAhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKshj>ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h*Upper 32-bits of location of block bitmap.h]h*Upper 32-bits of location of block bitmap.}(hjXhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKthjUubah}(h]h ]h"]h$]h&]uh1j|hj ubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x24h]h0x24}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKuhjuubah}(h]h ]h"]h$]h&]uh1j|hjrubj})}(hhh]h)}(h__le32h]h__le32}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKvhjubah}(h]h ]h"]h$]h&]uh1j|hjrubj})}(hhh]h)}(hbg_inode_bitmap_hih]hbg_inode_bitmap_hi}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKwhjubah}(h]h ]h"]h$]h&]uh1j|hjrubj})}(hhh]h)}(h+Upper 32-bits of location of inodes bitmap.h]h+Upper 32-bits of location of inodes bitmap.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKxhjubah}(h]h ]h"]h$]h&]uh1j|hjrubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x28h]h0x28}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKyhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h__le32h]h__le32}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKzhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hbg_inode_table_hih]hbg_inode_table_hi}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK{hjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h*Upper 32-bits of location of inodes table.h]h*Upper 32-bits of location of inodes table.}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK|hjubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x2Ch]h0x2C}(hjBhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK}hj?ubah}(h]h ]h"]h$]h&]uh1j|hj<ubj})}(hhh]h)}(h__le16h]h__le16}(hjYhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK~hjVubah}(h]h ]h"]h$]h&]uh1j|hj<ubj})}(hhh]h)}(hbg_free_blocks_count_hih]hbg_free_blocks_count_hi}(hjphhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjmubah}(h]h ]h"]h$]h&]uh1j|hj<ubj})}(hhh]h)}(h"Upper 16-bits of free block count.h]h"Upper 16-bits of free block count.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1j|hj<ubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x2Eh]h0x2E}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h__le16h]h__le16}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(hbg_free_inodes_count_hih]hbg_free_inodes_count_hi}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1j|hjubj})}(hhh]h)}(h"Upper 16-bits of free inode count.h]h"Upper 16-bits of free inode count.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1j|hjubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x30h]h0x30}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h__le16h]h__le16}(hj# hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(hbg_used_dirs_count_hih]hbg_used_dirs_count_hi}(hj: hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj7 ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h!Upper 16-bits of directory count.h]h!Upper 16-bits of directory count.}(hjQ hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjN ubah}(h]h ]h"]h$]h&]uh1j|hj ubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x32h]h0x32}(hjq hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjn ubah}(h]h ]h"]h$]h&]uh1j|hjk ubj})}(hhh]h)}(h__le16h]h__le16}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hjk ubj})}(hhh]h)}(hbg_itable_unused_hih]hbg_itable_unused_hi}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hjk ubj})}(hhh]h)}(h$Upper 16-bits of unused inode count.h]h$Upper 16-bits of unused inode count.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hjk ubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x34h]h0x34}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h__le32h]h__le32}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(hbg_exclude_bitmap_hih]hbg_exclude_bitmap_hi}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h7Upper 32-bits of location of snapshot exclusion bitmap.h]h7Upper 32-bits of location of snapshot exclusion bitmap.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x38h]h0x38}(hj; hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj8 ubah}(h]h ]h"]h$]h&]uh1j|hj5 ubj})}(hhh]h)}(h__le16h]h__le16}(hjR hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjO ubah}(h]h ]h"]h$]h&]uh1j|hj5 ubj})}(hhh]h)}(hbg_block_bitmap_csum_hih]hbg_block_bitmap_csum_hi}(hji hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjf ubah}(h]h ]h"]h$]h&]uh1j|hj5 ubj})}(hhh]h)}(h+Upper 16-bits of the block bitmap checksum.h]h+Upper 16-bits of the block bitmap checksum.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj} ubah}(h]h ]h"]h$]h&]uh1j|hj5 ubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x3Ah]h0x3A}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h__le16h]h__le16}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(hbg_inode_bitmap_csum_hih]hbg_inode_bitmap_csum_hi}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h+Upper 16-bits of the inode bitmap checksum.h]h+Upper 16-bits of the inode bitmap checksum.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubeh}(h]h ]h"]h$]h&]uh1jwhjubjx)}(hhh](j})}(hhh]h)}(h0x3Ch]h0x3C}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h__u32h]h__u32}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h bg_reservedh]h bg_reserved}(hj3 hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj0 ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(hPadding to 64 bytes.h]hPadding to 64 bytes.}(hjJ hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjG ubah}(h]h ]h"]h$]h&]uh1j|hj ubeh}(h]h ]h"]h$]h&]uh1jwhjubeh}(h]h ]h"]h$]h&]uh1jhjHubeh}(h]h ]h"]h$]h&]colsKuh1jFhjCubah}(h]h ]colwidths-givenah"]h$]h&]uh1jAhhhhhNhNubhtarget)}(h .. _bgflags:h]h}(h]h ]h"]h$]h&]jjuh1jx hKhhhhhh referencedKubh)}(h:Block group flags can be any combination of the following:h]h:Block group flags can be any combination of the following:}(hj hhhNhNubah}(h]jah ]h"]bgflagsah$]h&]uh1hhhhKhhhhexpect_referenced_by_name}j jz sexpect_referenced_by_id}jjz sj KubjB)}(hhh]jG)}(hhh](jL)}(hhh]h}(h]h ]h"]h$]h&]jVKuh1jKhj ubjL)}(hhh]h}(h]h ]h"]h$]h&]jVK@uh1jKhj ubjs)}(hhh]jx)}(hhh](j})}(hhh]h)}(hValueh]hValue}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(h Descriptionh]h Description}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubeh}(h]h ]h"]h$]h&]uh1jwhj ubah}(h]h ]h"]h$]h&]uh1jrhj ubj)}(hhh](jx)}(hhh](j})}(hhh]h)}(h0x1h]h0x1}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubj})}(hhh]h)}(hBinode table and bitmap are not initialized (EXT4_BG_INODE_UNINIT).h]hBinode table and bitmap are not initialized (EXT4_BG_INODE_UNINIT).}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1j|hj ubeh}(h]h ]h"]h$]h&]uh1jwhj ubjx)}(hhh](j})}(hhh]h)}(h0x2h]h0x2}(hj0 hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj- ubah}(h]h ]h"]h$]h&]uh1j|hj* ubj})}(hhh]h)}(h7block bitmap is not initialized (EXT4_BG_BLOCK_UNINIT).h]h7block bitmap is not initialized (EXT4_BG_BLOCK_UNINIT).}(hjG hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjD ubah}(h]h ]h"]h$]h&]uh1j|hj* ubeh}(h]h ]h"]h$]h&]uh1jwhj ubjx)}(hhh](j})}(hhh]h)}(h0x4h]h0x4}(hjg hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjd ubah}(h]h ]h"]h$]h&]uh1j|hja ubj})}(hhh]h)}(h-inode table is zeroed (EXT4_BG_INODE_ZEROED).h]h-inode table is zeroed (EXT4_BG_INODE_ZEROED).}(hj~ hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj{ ubah}(h]h ]h"]h$]h&]uh1j|hja ubeh}(h]h ]h"]h$]h&]uh1jwhj ubeh}(h]h ]h"]h$]h&]uh1jhj ubeh}(h]h ]h"]h$]h&]colsKuh1jFhj ubah}(h]h ]jt ah"]h$]h&]uh1jAhhhhhNhNubeh}(h]block-group-descriptorsah ]h"]block group descriptorsah$]h&]uh1hhhhhhhhKubeh}(h]h ]h"]h$]h&]sourcehuh1hcurrent_sourceN current_lineNsettingsdocutils.frontendValues)}(hN generatorN datestampN source_linkN source_urlN toc_backlinksj|footnote_backlinksK sectnum_xformKstrip_commentsNstrip_elements_with_classesN strip_classesN report_levelK halt_levelKexit_status_levelKdebugNwarning_streamN tracebackinput_encoding 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