446 lines
10 KiB
C
446 lines
10 KiB
C
/*
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* feature.c --- convert between features and strings
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*
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* Copyright (C) 1999 Theodore Ts'o <tytso@mit.edu>
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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* %End-Header%
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include "e2p.h"
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#include <ext2fs/ext2fs.h>
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#include <ext2fs/kernel-jbd.h>
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struct feature {
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int compat;
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unsigned int mask;
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const char *string;
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};
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static struct feature feature_list[] = {
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{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_PREALLOC,
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"dir_prealloc" },
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{ E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL,
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"has_journal" },
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{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_IMAGIC_INODES,
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"imagic_inodes" },
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{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_EXT_ATTR,
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"ext_attr" },
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{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX,
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"dir_index" },
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{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_RESIZE_INODE,
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"resize_inode" },
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{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_LAZY_BG,
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"lazy_bg" },
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{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP,
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"snapshot_bitmap" },
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{ E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_SPARSE_SUPER2,
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"sparse_super2" },
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{ E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_FAST_COMMIT,
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"fast_commit" },
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{ E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_STABLE_INODES,
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"stable_inodes" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER,
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"sparse_super" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_LARGE_FILE,
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"large_file" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_HUGE_FILE,
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"huge_file" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_GDT_CSUM,
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"uninit_bg" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_GDT_CSUM,
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"uninit_groups" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_DIR_NLINK,
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"dir_nlink" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE,
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"extra_isize" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_QUOTA,
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"quota" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_BIGALLOC,
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"bigalloc"},
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM,
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"metadata_csum"},
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_REPLICA,
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"replica" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_READONLY,
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"read-only" },
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_PROJECT,
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"project"},
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS,
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"shared_blocks"},
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{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_VERITY,
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"verity"},
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{ E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_COMPRESSION,
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"compression" },
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{ E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_FILETYPE,
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"filetype" },
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{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_RECOVER,
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"needs_recovery" },
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{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_JOURNAL_DEV,
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"journal_dev" },
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{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
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"extent" },
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{ E2P_FEATURE_INCOMPAT, EXT3_FEATURE_INCOMPAT_EXTENTS,
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"extents" },
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{ E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_META_BG,
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"meta_bg" },
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_64BIT,
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"64bit" },
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP,
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"mmp" },
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG,
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"flex_bg"},
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_EA_INODE,
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"ea_inode"},
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_DIRDATA,
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"dirdata"},
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CSUM_SEED,
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"metadata_csum_seed"},
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_LARGEDIR,
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"large_dir"},
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_INLINE_DATA,
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"inline_data"},
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT,
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"encrypt"},
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD,
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"casefold"},
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{ E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD,
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"fname_encoding"},
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{ 0, 0, 0 },
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};
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static struct feature jrnl_feature_list[] = {
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{ E2P_FEATURE_COMPAT, JBD2_FEATURE_COMPAT_CHECKSUM,
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"journal_checksum" },
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{ E2P_FEATURE_INCOMPAT, JBD2_FEATURE_INCOMPAT_REVOKE,
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"journal_incompat_revoke" },
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{ E2P_FEATURE_INCOMPAT, JBD2_FEATURE_INCOMPAT_64BIT,
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"journal_64bit" },
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{ E2P_FEATURE_INCOMPAT, JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT,
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"journal_async_commit" },
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{ E2P_FEATURE_INCOMPAT, JBD2_FEATURE_INCOMPAT_CSUM_V2,
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"journal_checksum_v2" },
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{ E2P_FEATURE_INCOMPAT, JBD2_FEATURE_INCOMPAT_CSUM_V3,
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"journal_checksum_v3" },
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{ 0, 0, 0 },
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};
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void e2p_feature_to_string(int compat, unsigned int mask, char *buf,
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size_t buf_len)
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{
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struct feature *f;
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char fchar;
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int fnum;
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for (f = feature_list; f->string; f++) {
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if ((compat == f->compat) &&
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(mask == f->mask)) {
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strncpy(buf, f->string, buf_len);
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buf[buf_len - 1] = 0;
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return;
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}
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}
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switch (compat) {
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case E2P_FEATURE_COMPAT:
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fchar = 'C';
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break;
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case E2P_FEATURE_INCOMPAT:
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fchar = 'I';
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break;
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case E2P_FEATURE_RO_INCOMPAT:
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fchar = 'R';
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break;
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default:
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fchar = '?';
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break;
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}
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for (fnum = 0; mask >>= 1; fnum++);
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sprintf(buf, "FEATURE_%c%d", fchar, fnum);
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}
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const char *e2p_feature2string(int compat, unsigned int mask)
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{
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static char buf[20];
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e2p_feature_to_string(compat, mask, buf, sizeof(buf) / sizeof(buf[0]));
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return buf;
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}
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int e2p_string2feature(char *string, int *compat_type, unsigned int *mask)
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{
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struct feature *f;
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char *eptr;
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int num;
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for (f = feature_list; f->string; f++) {
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if (!strcasecmp(string, f->string)) {
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*compat_type = f->compat;
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*mask = f->mask;
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return 0;
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}
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}
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if (strncasecmp(string, "FEATURE_", 8))
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return 1;
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switch (string[8]) {
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case 'c':
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case 'C':
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*compat_type = E2P_FEATURE_COMPAT;
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break;
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case 'i':
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case 'I':
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*compat_type = E2P_FEATURE_INCOMPAT;
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break;
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case 'r':
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case 'R':
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*compat_type = E2P_FEATURE_RO_INCOMPAT;
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break;
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default:
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return 1;
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}
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if (string[9] == 0)
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return 1;
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num = strtol(string+9, &eptr, 10);
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if (num > 31 || num < 0)
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return 1;
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if (*eptr)
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return 1;
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*mask = 1 << num;
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return 0;
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}
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const char *e2p_jrnl_feature2string(int compat, unsigned int mask)
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{
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struct feature *f;
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static char buf[20];
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char fchar;
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int fnum;
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for (f = jrnl_feature_list; f->string; f++) {
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if ((compat == f->compat) &&
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(mask == f->mask))
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return f->string;
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}
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switch (compat) {
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case E2P_FEATURE_COMPAT:
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fchar = 'C';
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break;
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case E2P_FEATURE_INCOMPAT:
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fchar = 'I';
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break;
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case E2P_FEATURE_RO_INCOMPAT:
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fchar = 'R';
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break;
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default:
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fchar = '?';
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break;
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}
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for (fnum = 0; mask >>= 1; fnum++);
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sprintf(buf, "FEATURE_%c%d", fchar, fnum);
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return buf;
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}
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int e2p_jrnl_string2feature(char *string, int *compat_type, unsigned int *mask)
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{
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struct feature *f;
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char *eptr;
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int num;
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for (f = jrnl_feature_list; f->string; f++) {
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if (!strcasecmp(string, f->string)) {
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*compat_type = f->compat;
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*mask = f->mask;
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return 0;
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}
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}
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if (strncasecmp(string, "FEATURE_", 8))
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return 1;
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switch (string[8]) {
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case 'c':
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case 'C':
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*compat_type = E2P_FEATURE_COMPAT;
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break;
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case 'i':
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case 'I':
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*compat_type = E2P_FEATURE_INCOMPAT;
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break;
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case 'r':
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case 'R':
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*compat_type = E2P_FEATURE_RO_INCOMPAT;
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break;
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default:
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return 1;
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}
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if (string[9] == 0)
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return 1;
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num = strtol(string+9, &eptr, 10);
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if (num > 31 || num < 0)
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return 1;
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if (*eptr)
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return 1;
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*mask = 1 << num;
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return 0;
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}
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static char *skip_over_blanks(char *cp)
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{
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while (*cp && isspace(*cp))
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cp++;
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return cp;
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}
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static char *skip_over_word(char *cp)
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{
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while (*cp && !isspace(*cp) && *cp != ',')
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cp++;
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return cp;
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}
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/*
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* Edit a feature set array as requested by the user. The ok_array,
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* if set, allows the application to limit what features the user is
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* allowed to set or clear using this function. If clear_ok_array is set,
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* then use it tell whether or not it is OK to clear a filesystem feature.
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*/
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int e2p_edit_feature2(const char *str, __u32 *compat_array, __u32 *ok_array,
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__u32 *clear_ok_array, int *type_err,
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unsigned int *mask_err)
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{
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char *cp, *buf, *next;
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int neg;
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unsigned int mask;
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int compat_type;
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int rc = 0;
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if (!clear_ok_array)
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clear_ok_array = ok_array;
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if (type_err)
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*type_err = 0;
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if (mask_err)
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*mask_err = 0;
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buf = malloc(strlen(str)+1);
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if (!buf)
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return 1;
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strcpy(buf, str);
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for (cp = buf; cp && *cp; cp = next ? next+1 : 0) {
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neg = 0;
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cp = skip_over_blanks(cp);
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next = skip_over_word(cp);
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if (*next == 0)
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next = 0;
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else
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*next = 0;
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if ((strcasecmp(cp, "none") == 0) ||
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(strcasecmp(cp, "clear") == 0)) {
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compat_array[0] = 0;
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compat_array[1] = 0;
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compat_array[2] = 0;
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continue;
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}
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switch (*cp) {
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case '-':
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case '^':
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neg++;
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/* fallthrough */
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case '+':
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cp++;
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break;
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}
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if (e2p_string2feature(cp, &compat_type, &mask)) {
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rc = 1;
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break;
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}
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if (neg) {
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if (clear_ok_array &&
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!(clear_ok_array[compat_type] & mask)) {
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rc = 1;
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if (type_err)
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*type_err = (compat_type |
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E2P_FEATURE_NEGATE_FLAG);
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if (mask_err)
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*mask_err = mask;
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break;
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}
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compat_array[compat_type] &= ~mask;
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} else {
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if (ok_array && !(ok_array[compat_type] & mask)) {
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rc = 1;
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if (type_err)
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*type_err = compat_type;
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if (mask_err)
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*mask_err = mask;
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break;
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}
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compat_array[compat_type] |= mask;
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}
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}
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free(buf);
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return rc;
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}
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int e2p_edit_feature(const char *str, __u32 *compat_array, __u32 *ok_array)
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{
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return e2p_edit_feature2(str, compat_array, ok_array, 0, 0, 0);
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}
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#ifdef TEST_PROGRAM
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int main(int argc, char **argv)
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{
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int compat, compat2, i;
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unsigned int mask, mask2;
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const char *str;
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struct feature *f;
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for (i = 0; i < 2; i++) {
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if (i == 0) {
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f = feature_list;
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printf("Feature list:\n");
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} else {
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printf("\nJournal feature list:\n");
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f = jrnl_feature_list;
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}
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for (; f->string; f++) {
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if (i == 0) {
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e2p_string2feature((char *)f->string, &compat,
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&mask);
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str = e2p_feature2string(compat, mask);
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} else {
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e2p_jrnl_string2feature((char *)f->string,
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&compat, &mask);
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str = e2p_jrnl_feature2string(compat, mask);
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}
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printf("\tCompat = %d, Mask = %u, %s\n",
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compat, mask, f->string);
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if (strcmp(f->string, str)) {
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if (e2p_string2feature((char *) str, &compat2,
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&mask2) ||
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(compat2 != compat) ||
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(mask2 != mask)) {
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fprintf(stderr, "Failure!\n");
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exit(1);
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}
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}
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}
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}
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exit(0);
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}
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#endif
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