| Sat Sep 7 07:36:03 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * initialize.c: Override the kernel's idea of default |
| checkinterval from 0 (never) to 180 days. |
| |
| Wed Aug 28 03:20:03 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * namei.c (ext2fs_namei_follow): New function which follows |
| symbolic link (if any) at the target. |
| |
| Tue Aug 27 01:48:43 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * inode.c (ext2fs_read_inode, ext2fs_write_inode): Add support |
| for shortcut function fs->read_inode() and fs->write_inode(). |
| Added inode_cache to reduce CPU time spent in doing |
| byte swapping. |
| |
| * swapfs.c (ext2fs_swap_super): Swap the new fields in a V2 |
| superblock. |
| |
| * namei.c (ext2fs_follow_link): New function. |
| (ext2fs_namei): Extended to have support for chasing |
| symbolic links. ext2fs_namei() still returns an inode |
| which is a symbolic link. Symbolic links are only chased |
| while resolving the containing directory. To chase |
| symbolic links of the final result, use |
| ext2fs_follow_link(). |
| |
| Mon Aug 26 23:46:07 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * ext2_err.et.in: Added new error code EXT2_ET_SYMLINK_LOOP. |
| |
| * bitops.h (ext2fs_set_bit, ext2fs_celar_bit): Use asm inlines |
| provided by Pete A. Zaitcev (zaitcev@lab.sun.mcst.ru). |
| |
| Thu Aug 22 00:40:18 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * initialize.c (ext2fs_initialize): On systems where the byte |
| order is not i386 compatible, set the swap_byte flag. |
| |
| * inode.c (inocpy_with_swap): Check to see if inode contains a |
| fast symlink before swapping the inode block fields. This |
| required adding a new argument to inocpy_with_swap to |
| determine whether the mode field is in host order or not. |
| |
| Wed Aug 21 00:45:42 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * bitops.h (ext2fs_set_bit, ext2fs_clear_bit, ext2fs_test_bit): On |
| the sparc, if EXT2_STD_BITOPS set, use the standard |
| i386-compatible bitmask operations, instead on the |
| non-standard native bitmask operators. |
| |
| Fri Aug 9 11:11:35 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * block.c (ext2fs_block_iterate): Cause block iterator to return |
| the HURD translator block (along with everything else). |
| If the flag BLOCK_FLAG_DATA_ONLY is passed to the block |
| iterator, then don't return any meta data blocks |
| (including the HURD translator). |
| |
| Wed Jul 17 17:13:34 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * gen_uuid.c: New file, which generates DCE-compatible UUIDs. |
| |
| * uuid.c: New file, containing UUID utility functions. |
| |
| Tue Jul 16 10:19:16 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * ext2fs.h: Add a definition of the "real" ext2 superblock. |
| |
| Fri May 24 14:54:55 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * ext2fs.h: Fix erroneous ino_t type used in block_bitmap type. |
| |
| Sun May 19 15:39:03 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * openfs.c (ext2fs_open): If the blocksize in the superblock is |
| zero, return the error EXT2_ET_CORRUPT_SUPERBLOCK, since |
| that's a basic value that must be correct for the rest of |
| the library to work. |
| |
| * ext2_err.et.in (EXT2_ET_CORRUPT_SUPERBLOCK): Added new error |
| code. |
| |
| Thu May 16 11:12:30 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> |
| |
| * Release of E2fsprogs version 1.04 |
| |
| Wed Mar 27 00:33:40 1996 <tytso@rsts-11.mit.edu> |
| |
| * Release of E2fsprogs version 1.03 |
| |
| Tue Mar 26 12:06:32 1996 <tytso@rsts-11.mit.edu> |
| |
| * bitops.h (ext2fs_set_bit, ext2fs_clear_bit, ext2fs_test_bit): |
| Change the m68k bit numbering for bitmasks to match with |
| the bit numbering used by all other ext2 implementations. |
| |
| Thu Mar 7 03:37:00 1996 <tytso@rsts-11.mit.edu> |
| |
| * inode.c (ext2fs_get_next_inode, ext2fs_close_inode_scan, |
| ext2fs_open_inode_scan): Support dynamically-sized inodes. |
| |
| Wed Mar 6 12:26:29 1996 <tytso@rsts-11.mit.edu> |
| |
| * inode.c (ext2fs_read_inode, ext2fs_write_inode): Support |
| dynamically-sized inodes. |
| |
| * openfs.c (ext2fs_open): Allow dynamic revision filesystem to be |
| loaded. |
| |
| Tue Mar 5 03:49:37 1996 <tytso@rsts-11.mit.edu> |
| |
| * initialize.c (ext2fs_initialize): Catch an error condition where |
| the passed in size is *really* too small. |
| |
| * alloc.c (ext2fs_new_inode): |
| * ext2fs.h (EXT2_FIRST_INODE): Add support for dynamic revision to |
| get first inode. |
| |
| Wed Feb 21 15:56:17 1996 <tytso@rsts-11.mit.edu> |
| |
| * getsize.c (ext2fs_get_device_size): Open the device read-only |
| when trying to determine its size. |
| |
| Wed Jan 31 11:06:08 1996 <tytso@rsts-11.mit.edu> |
| |
| * Release of E2fsprogs version 1.02 |
| |
| Sat Dec 9 09:57:50 1995 <tytso@rsts-11.mit.edu> |
| |
| * rw_bitops.c (ext2fs_write_block_bitmap): |
| * bitops.c (ext2fs_test_bit, ext2fs_clear_bit, ext2fs_set_bit): |
| * bitops.h (ext2fs_test_bit, ext2fs_clear_bit, ext2fs_set_bit): |
| Rename {test,set,clear}_bit to ext2fs_{test,set,clear}_bit, |
| to avoid conflicts with with kernel include files. Also |
| rename ADDR and CONST_ADDR to EXT2FS_ADDR and |
| EXT2FS_CONST_ADDR. |
| |
| Thu Oct 26 12:09:16 1995 <tytso@rsts-11.mit.edu> |
| |
| * ext2_err.et: Updated message in EXT2_ET_BASE to say version 0.5c |
| |
| * swapfs.c (ext2fs_swap_super): Put an #ifdef check around |
| s_def_resuid and s_def_resgid for backwards compatibility. |
| |
| Fri Oct 20 23:33:31 1995 <tytso@rsts-11.mit.edu> |
| |
| * bitops.h: Added #ifdef's for Sparc. |
| |
| Wed Sep 6 22:14:46 1995 <tytso@rsts-11.mit.edu> |
| |
| * getsize.c: #include <sys/ioctl.h> under Linux to pick up ioctl() |
| declaration |
| |
| * closefs.c: #include <string.h> to pick up memset() declaration |
| |
| Mon Sep 4 21:45:29 1995 Remy Card <card@bbj> |
| |
| * Makefile.in: Added support for BSD shared libraries. |
| |
| * initialize.c (ext2fs_initialize): Correctly set the s_creator_os |
| flag. |
| |
| Mon Sep 4 09:55:30 1995 <tytso@rsts-11.mit.edu> |
| |
| * unix_io.c (unix_open): Add a double check; if the passed in name |
| is NULL, return EXT2_ET_BAD_DEVICE_NAME. |
| |
| * ext2_err.et (EXT2_ET_BAD_DEVICE_NAME): Added new error code |
| |
| Wed Aug 16 15:44:10 1995 <tytso@rsts-11.mit.edu> |
| |
| * inode.c (ext2fs_check_directory): Use LINUX_S_ISDIR instead of |
| S_ISDIR. |
| |
| Tue Aug 15 13:08:36 1995 <tytso@rsts-11.mit.edu> |
| |
| * getsize.c (ext2fs_get_device_size): Add support for reading the |
| partition size from a BSD disk label. |
| |
| Thu Aug 10 09:33:26 1995 Theodore Y. Ts'o <tytso@lurch.mit.edu> |
| |
| * getsize.c (ext2fs_get_device_size): New function that determins |
| the size of a device. Used by mke2fs and e2fsck. |
| |
| Sat Aug 12 03:09:54 1995 Remy Card <card@bbj> |
| |
| * Makefile.in (install): Install static libraries in $(ulibdir) |
| (/usr/lib on Linux) instead of $(libdir) (/lib on Linux). |
| |
| Wed Aug 9 17:04:23 1995 Theodore Y. Ts'o <tytso@dcl> |
| |
| * bitmaps.c (ext2fs_free_inode_bitmap, ext2fs_free_block_bitmap): |
| Move these functions to freefs.c. |
| |
| * closefs.c (ext2fs_flush): If swapping blocks, clear the group |
| descriptors shadow memory to keep purify quiet. (This |
| also has the nice benefit that the unused portion of the |
| shadow descriptors are zeroed out.) |
| |
| * dirblock.c (ext2fs_write_dir_block): We need to use |
| dirent->rec_len *before* it's byteswapped to find the |
| location of the next directory structure! |
| |
| * alloc.c (ext2fs_new_inode): Fix bug which could potentially |
| cause ext2fs_new_inode to loop infinitely if we're trying |
| to allocate an inode in group #0 and there are no free |
| inodes at all in the system. |
| |
| * closefs.c: #include <errno.h> if it exists. |
| |
| Sun Aug 6 13:27:50 1995 Theodore Y. Ts'o <tytso@lurch.mit.edu> |
| |
| * ext2fs.h (BLOCK_FLAG_HOLE): Added new definition for |
| BLOCK_FLAG_APPEND. Added documentation for the block |
| interator flags. |
| |
| Sat Aug 5 11:44:05 1995 Theodore Y. Ts'o <tytso@lurch.mit.edu> |
| |
| * Makefile.in (DLL_INSTALL_DIR, ELF_INSTALL_DIR): Set the |
| installation directories correctly. |
| |
| Tue Jul 18 09:27:38 1995 <tytso@rsx-11.mit.edu> |
| |
| * namei.c (process_dir_block): |
| * mkdir.c (ext2fs_mkdir): |
| * expanddir.c (expand_dir_proc): Use ext2fs_{read,write}_dir_block |
| to read/write the directory block. |
| |
| * dirblock.c (ext2fs_read_dir_block), ext2fs_write_dir_block): New |
| file containing functions for reading and writing |
| directory blocks (byte swapping if necesssary) |
| |
| * block.c (block_iterate_ind, block_iterate_dind, |
| block_iterate_tind): Byte swap the block addresses if |
| EXT2_SWAP_BYTES is set (and swap them back before writing |
| them out.) |
| |
| * inode.c (inocpy_with_swap): New function. |
| (ext2fs_get_next_inode, ext2fs_read_inode, ext2fs_write_inode): |
| Call inocpy_with_swap if EXT2_SWAP_BYTES if set. |
| |
| * closefs.c (ext2fs_flush): If EXT2_SWAP_BYTES is set, then swap |
| the superblock and group descriptors before writing it out. |
| |
| * openfs.c (ext2fs_open): If the magic number is byte-swapped, |
| then set the EXT2_SWAP_BYTES and byte-swap the superblock |
| and group descriptors. |
| |
| * swapfs.c (ext2fs_swap_super, ext2fs_swap_group_desc): New functions |
| to desp ext2 filesystem structures. |
| |
| * bitops.c (set_bit, clear_bit, test_bit): Use modifications |
| supplied by Pete A. Zaitcev so that the C language |
| versions of these functions are more portable. They will |
| now work on both little and big endian systems, and the |
| assumption that 32-bit integers are used is gone. |
| |
| * bitops.h (ext2_swab16, ext2_swab32): Added new functions for |
| doing byte swapping. |
| |
| * ext2fs.h (EXT2_SWAP_BYTES): Add new flag which indicates that |
| byte swapping should take place. |
| |
| Sun Jul 16 06:21:43 1995 <tytso@rsx-11.mit.edu> |
| |
| * Makefile.in, cmp_bitmaps.c (ext2fs_compare_block_bitmap_end, |
| ext2fs_compare_inode_bitmap_end): Added new file |
| containing routines to compare bitmaps. |
| |
| * ext2_err.et (EXT2_ET_NEQ_BLOCK_BITMAP, EXT2_ET_NEQ_INODE_BITMAP): |
| Added new error codes. |
| |
| Sat Jul 15 04:23:37 1995 <tytso@rsx-11.mit.edu> |
| |
| * inode.c (ext2fs_get_next_inode): Don't check scan->inode_buffer; |
| if the magic number is correct, it will be allocated. |
| |
| Fri Jul 14 19:02:59 1995 <tytso@rsx-11.mit.edu> |
| |
| * block.c (block_iterate_ind, block_iterate_dind, |
| block_iterate_tind): Don't recompute block_nr each loop; |
| just increment it! Factor check of BLOCK_FLAG_APPEND out |
| of the loop. Factor mask of BLOCK_CHANGED into changed |
| variable out of the loop. (block_iterate_ind, in |
| particular, gets called a lot, so every little |
| optimization helps.) |
| |
| Thu Jul 13 08:02:45 1995 <tytso@rsx-11.mit.edu> |
| |
| * block.c (block_iterate_ind, block_iterate_dind, |
| block_iterate_tind): Precompute limit of loop to speed up |
| block_iterate_ind and company. |
| |
| * bitops.h (ext2fs_fast_mark_block_bitmap, |
| ext2fs_fast_unmark_block_bitmap, ext2fs_fast_test_block_bitmap, |
| ext2fs_fast_mark_inode_bitmap, ext2fs_fast_unmark_inode_bitmap, |
| ext2fs_fast_test_inode_bitmap): Add fast version of these |
| functions, which don't do range checking. |
| |
| * bitops.h (ext2fs_get_block_bitmap_start, |
| ext2fs_get_inode_bitmap_start, ext2fs_get_block_bitmap_end, |
| ext2fs_get_inode_bitmap_end): Add new accessor functions |
| which return the start and end points of the bitmaps. |
| |
| Tue Jul 11 18:59:41 1995 <tytso@rsx-11.mit.edu> |
| |
| * llseek.c (ext2_llseek): If the offset is small enough, use lseek |
| instead of llseek. The errno if the offset is too large |
| and lseek is not supported should be EINVAL, not -EINVAL. |
| |
| Thu Jun 15 23:43:02 1995 Remy Card <card@bbj> |
| |
| * Makefile.in: Added support for ELF shared libraries. |
| Fixed typos in the compilation rules. |
| (distclean): Added Makefile. |
| |
| * llseek.c (llseek): New function, if llseek() does not exist in the |
| C library. |
| (ext2_llseek): Changed to call llseek(). |
| |
| Mon Jun 12 08:29:07 1995 Theodore Y. Ts'o <tytso@lurch.mit.edu> |
| |
| * ext2fs.h: Use __u32 to define blk_t, instead of unsigned long. |
| |
| Sun Jun 11 15:02:54 1995 Theodore Y. Ts'o <tytso@lurch.mit.edu> |
| |
| * mkdir.c (ext2fs_mkdir): Use LINUX_S_IFDIR instead of S_IFDIR. |
| |
| * ext2fs.h (LINUX_S_IFDIR): Define a linux specific versions of |
| the S_*, which are normally defined in <sys/stat.h>. This |
| allows us to compile e2fsprogs on a non-Linux system, |
| which may have a different value for S_IFDIR. |
| |
| Sat Jun 10 23:47:05 1995 Theodore Y. Ts'o <tytso@lurch.mit.edu> |
| |
| * bitops.c (clear_bit, set_bit): Remove calls to cli() and sti(); |
| this is a user-mode application! |
| |
| Thu Jun 8 13:13:22 1995 Miles Bader <miles@churchy.gnu.ai.mit.edu> |
| |
| * llseek.c: Put the include of <linux/unistd.h> inside the #ifdef |
| __linux__ so that non-linux systems won't see it. |
| |
| * alloc.c: Include <errno.h> if possible. |
| * badblocks.c: Ditto. |
| * bb_inode.c: Ditto. |
| * bitmaps.c: Ditto. |
| * block.c: Ditto. |
| * expanddir.c: Ditto. |
| * get_pathname.c: Ditto. |
| * initialize.c: Ditto. |
| * inode.c: Ditto. |
| * llseek.c: Ditto. |
| * mkdir.c: Ditto. |
| * namei.c: Ditto. |
| * newdir.c: Ditto. |
| * openfs.c: Ditto. |
| * rw_bitmaps.c: Ditto. |
| * unix_io.c: Ditto. |
| |
| * Makefile.in: Rewritten to conform to GNU coding standards and |
| support separate compilation directories. |
| |
| Thu May 11 04:13:12 1995 <tytso@rsx-11.mit.edu> |
| |
| * initialize.c (ext2fs_initialize): Don't allow more than one |
| bitmaps's worth of inodes in a group. |
| |
| Sat Mar 11 14:07:11 1995 Theodore Y. Ts'o <tytso@localhost> |
| |
| * llseek.c (ext2_llseek): Added error checking to the llseek() |
| compat code to protect against overflow. This only |
| applies to 1.0 and early 1.1 kernels, which don't support |
| the llseek() system call. |
| |
| Thu Nov 24 16:29:00 1994 Theodore Y. Ts'o (tytso@rt-11) |
| |
| * unix_io.c (unix_open): Initialize the read_error and write_error |
| io_channel pointers to be null. |
| |
| * bb_inode.c (clear_bad_block_proc): If an illegal block number is |
| found, clear it but don't try to update the filesystem |
| accounting information, since that's hopeless anyway. |
| |
| * block.c (bloblock_iterate_ind, bloblock_iterate_dind, |
| bloblock_iterate_tind): Check to see if the indirect blocks are |
| valid before trying to read them. |
| |
| * ext2_err.et (EXT2_ET_BAD_IND_BLOCK, EX2_ET_BAD_DIND_BLOCK, |
| EXT2_ET_BAD_TIND_BLOCK): Add new error codes. |
| |
| * bitops.h (ext2fs_mark_block_bitmap, ext2fs_unmark_block_bitmap, |
| ext2fs_test_block_bitmap, ext2fs_mark_inode_bitmap, |
| ext2fs_unmark_inode_bitmap, ext2fs_test_inode_bitmap): If an |
| illegal block or inode number is passed in, return instead |
| of trying to test, set, or clear the bit. |
| |
| Mon Nov 7 21:32:33 1994 Remy Card <card@bbj> |
| |
| * Makefile: Added a dummy install target in case shared libraries |
| are not built. |
| |
| Mon Oct 24 14:11:44 1994 (tytso@rsx-11) |
| |
| * bitmaps.c (ext2fs_allocate_block_bitmap): Fix calculation of how |
| the real last block of the bitmap should be calculated. |
| |
| Wed Sep 7 10:05:36 1994 (tytso@rsx-11) |
| |
| * bitmaps.c (ext2fs_fudge_inode_bitmap_end, |
| ext2fs_fudge_block_bitmap_end, ext2fs_clear_inode_bitmap, |
| ext2fs_clear_block_bitmap, ext2fs_free_inode_bitmap, |
| ext2fs_free_block_bitmap): Add magic number checking for |
| the inode and block bitmaps. |
| |
| * bitmaps.c (ext2fs_allocate_block_bitmap): Fix to set the correct |
| magic number for a block bitmap instead of an inode bitmap. |
| |
| * inode.c (ext2fs_close_inode_scan, ext2fs_get_next_inode): Add |
| magic number checking for the inode_scan structure. |
| |
| * badblocks.c (badblocks_list_free, badblocks_list_add, |
| badblocks_list_test, badblocks_list_iterate_begin, |
| badblocks_list_iterate, badblocks_list_iterate_end): Add |
| magic number checking for the badblocks_list and |
| badblocks_iterate structures. |
| |
| * ext2_err.et (EXT2_ET_MAGIC_UNIX_IO_CHANNEL): |
| * unix_io.c (unix_open, unix_close, unix_set_blksize, unix_read_blk, |
| unix_write_blk, unix_flush): Add magic number checking |
| both for io_channel structure and unix_private_data |
| structure. |
| |
| * openfs.c (ext2fs_open): Add check for io_manager structure's |
| magic number. |
| |
| * rw_bitmaps.c (ext2fs_write_inode_bitmap, ext2fs_write_block_bitmap, |
| ext2fs_read_inode_bitmap, ext2fs_read_block_bitmap, |
| ext2fs_read_bitmaps, ext2fs_write_bitmaps): |
| * read_bb.c (ext2fs_read_bb_inode): |
| * read_bb_file.c (ext2fs_read_bb_FILE): |
| * newdir.c (ext2fs_new_dir_block): |
| * namei.c (ext2fs_dir_iterate, ext2fs_lookup, ext2fs_namei): |
| * link.c (ext2fs_link, ext2fs_unlink): |
| * inode.c (ext2fs_open_inode_scan, ext2fs_read_inode, |
| ext2fs_write_inode, ext2fs_get_blocks, |
| ext2fs_check_directory): |
| * get_pathname.c (ext2fs_get_pathname): |
| * expanddir.c (ext2fs_expand_dir): |
| * block.c (ext2fs_block_iterate): |
| * bitmaps.c (ext2fs_allocate_inode_bitmap, |
| ext2fs_allocate_block_bitmap): |
| * bb_inode.c (ext2fs_update_bb_inode): |
| * alloc.c (ext2fs_new_inode,ext2fs_new_block,ext2fs_get_free_blocks): |
| * check_desc.c (ext2fs_check_desc): |
| * closefs.c (ext2fs_close, ext2fs_flush): |
| * freefs.c (ext2fs_free): Add check for ext2_filsys magic number. |
| |
| * Makefile: |
| * ext2fs.h: |
| * openfs.c: |
| * check_desc.c (ext2fs_check_desc): Move ext2fs_check_desc from |
| openfs.c into its own file. |
| |
| * ext2fs.h (EXT2_CHECK_MAGIC): Added macro for checking for |
| structure magic numbers. |
| |
| * closefs.c (ext2fs_flush): Folded in Remy Card's changes to clear |
| the EXT2_VALID_FS flag in the backup superblock blocks, so that if |
| someone uses the -b option to specify the use of the backup |
| superblock --- this usually means that the main superblock is |
| toast. :-) |
| |
| * ext2fs.h: |
| * ext2_err.et (EXT2_ET_REV_TOO_HIGH): |
| * openfs.c (ext2fs_open): Folded in Remy Card's changes to add a |
| revision level to the superblock. |
| |
| Sun Aug 21 00:50:08 1994 Theodore Y. Ts'o (tytso@rt-11) |
| |
| * ext2fs.h: |
| * bitmaps.c: |
| * bitops.c |
| * bitops.h: |
| * openfs.c: |
| * initialize.c: Completely revamped the inode and block bitmap |
| structures, so that they can be better chance of being extensible |
| in a shared library. They are now their own type, instead of |
| being a char *. Also, the function signatures of |
| ext2fs_test_block_bitmap, ext2fs_mark_block_bitmap, |
| ext2fs_unmark_block_bitmap, ext2fs_test_inode_bitmap, |
| ext2fs_mark_inode_bitmap, and ext2fs_unmark_inode_bitmap were |
| changed to eliminate the ext2_filsys argument, since it is no |
| longer necessary. |
| |
| Wed Aug 17 21:46:44 1994 Remy Card (card@bbj) |
| |
| * unix_io.c (unix_read_blk and unix_write_blk): use the llseek |
| system call if available. |
| |
| * llseek.c: new file. This is the stub calling the llseek system |
| call which allows supports for 2GB+ file systems. |
| |
| * initialize.c (ext2fs_initialize): Ext2fs_initialize now stores |
| the creator operating system. |
| |
| Wed Aug 17 10:03:24 1994 Theodore Y. Ts'o (tytso@rt-11) |
| |
| * initialize.c (ext2fs_initialize): Ext2fs_initialize now sets up |
| the group descriptor statistics in addition to everything else. |
| This relieves mke2fs of the responsibility of doing it. |
| |
| * bitops.c, bitops.h: Add assembly inline functions for the 68000. |
| Added a new #define, _EXT2_HAVE_ASM_BITOPS_ to control whether or |
| not the generic C function equivalents should be included or not. |
| |
| * openfs.c (ext2fs_open): If a superblock is specified, then use |
| the backup group descriptors that go along with this superblock, |
| instead of using the primary group descriptors. This allows |
| e2fsck to recover filesystems where the primary group descriptors |
| have been trashed. |
| |
| |