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-rw-r--r--lib/ext2fs/gen_bitmap64.c981
1 files changed, 981 insertions, 0 deletions
diff --git a/lib/ext2fs/gen_bitmap64.c b/lib/ext2fs/gen_bitmap64.c
new file mode 100644
index 0000000..4289e81
--- /dev/null
+++ b/lib/ext2fs/gen_bitmap64.c
@@ -0,0 +1,981 @@
+/*
+ * gen_bitmap64.c --- routines to read, write, and manipulate the new qinode and
+ * block bitmaps.
+ *
+ * Copyright (C) 2007, 2008 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <time.h>
+#include <errno.h>
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fsP.h"
+#include "bmap64.h"
+
+/*
+ * Design of 64-bit bitmaps
+ *
+ * In order maintain ABI compatibility with programs that don't
+ * understand about 64-bit blocks/inodes,
+ * ext2fs_allocate_inode_bitmap() and ext2fs_allocate_block_bitmap()
+ * will create old-style bitmaps unless the application passes the
+ * flag EXT2_FLAG_64BITS to ext2fs_open(). If this flag is
+ * passed, then we know the application has been recompiled, so we can
+ * use the new-style bitmaps. If it is not passed, we have to return
+ * an error if trying to open a filesystem which needs 64-bit bitmaps.
+ *
+ * The new bitmaps use a new set of structure magic numbers, so that
+ * both the old-style and new-style interfaces can identify which
+ * version of the data structure was used. Both the old-style and
+ * new-style interfaces will support either type of bitmap, although
+ * of course 64-bit operation will only be possible when both the
+ * new-style interface and the new-style bitmap are used.
+ *
+ * For example, the new bitmap interfaces will check the structure
+ * magic numbers and so will be able to detect old-stype bitmap. If
+ * they see an old-style bitmap, they will pass it to the gen_bitmap.c
+ * functions for handling. The same will be true for the old
+ * interfaces as well.
+ *
+ * The new-style interfaces will have several different back-end
+ * implementations, so we can support different encodings that are
+ * appropriate for different applications. In general the default
+ * should be whatever makes sense, and what the application/library
+ * will use. However, e2fsck may need specialized implementations for
+ * its own uses. For example, when doing parent directory pointer
+ * loop detections in pass 3, the bitmap will *always* be sparse, so
+ * e2fsck can request an encoding which is optimized for that.
+ */
+
+static void warn_bitmap(ext2fs_generic_bitmap_64 bitmap,
+ int code, __u64 arg)
+{
+#ifndef OMIT_COM_ERR
+ if (bitmap->description)
+ com_err(0, bitmap->base_error_code+code,
+ "#%llu for %s", (unsigned long long) arg,
+ bitmap->description);
+ else
+ com_err(0, bitmap->base_error_code + code, "#%llu",
+ (unsigned long long) arg);
+#endif
+}
+
+#ifdef ENABLE_BMAP_STATS_OPS
+#define INC_STAT(map, name) map->stats.name
+#else
+#define INC_STAT(map, name) ;;
+#endif
+
+
+errcode_t ext2fs_alloc_generic_bmap(ext2_filsys fs, errcode_t magic,
+ int type, __u64 start, __u64 end,
+ __u64 real_end,
+ const char *descr,
+ ext2fs_generic_bitmap *ret)
+{
+ ext2fs_generic_bitmap_64 bitmap;
+ struct ext2_bitmap_ops *ops;
+ ext2_ino_t num_dirs;
+ errcode_t retval;
+
+ if (!type)
+ type = EXT2FS_BMAP64_BITARRAY;
+
+ switch (type) {
+ case EXT2FS_BMAP64_BITARRAY:
+ ops = &ext2fs_blkmap64_bitarray;
+ break;
+ case EXT2FS_BMAP64_RBTREE:
+ ops = &ext2fs_blkmap64_rbtree;
+ break;
+ case EXT2FS_BMAP64_AUTODIR:
+ retval = ext2fs_get_num_dirs(fs, &num_dirs);
+ if (retval || num_dirs > (fs->super->s_inodes_count / 320))
+ ops = &ext2fs_blkmap64_bitarray;
+ else
+ ops = &ext2fs_blkmap64_rbtree;
+ break;
+ default:
+ return EINVAL;
+ }
+
+ retval = ext2fs_get_memzero(sizeof(struct ext2fs_struct_generic_bitmap_64),
+ &bitmap);
+ if (retval)
+ return retval;
+
+#ifdef ENABLE_BMAP_STATS
+ if (gettimeofday(&bitmap->stats.created,
+ (struct timezone *) NULL) == -1) {
+ perror("gettimeofday");
+ ext2fs_free_mem(&bitmap);
+ return 1;
+ }
+ bitmap->stats.type = type;
+#endif
+
+ /* XXX factor out, repeated in copy_bmap */
+ bitmap->magic = magic;
+ bitmap->fs = fs;
+ bitmap->start = start;
+ bitmap->end = end;
+ bitmap->real_end = real_end;
+ bitmap->bitmap_ops = ops;
+ bitmap->cluster_bits = 0;
+ switch (magic) {
+ case EXT2_ET_MAGIC_INODE_BITMAP64:
+ bitmap->base_error_code = EXT2_ET_BAD_INODE_MARK;
+ break;
+ case EXT2_ET_MAGIC_BLOCK_BITMAP64:
+ bitmap->base_error_code = EXT2_ET_BAD_BLOCK_MARK;
+ bitmap->cluster_bits = fs->cluster_ratio_bits;
+ break;
+ default:
+ bitmap->base_error_code = EXT2_ET_BAD_GENERIC_MARK;
+ }
+ if (descr) {
+ retval = ext2fs_get_mem(strlen(descr)+1, &bitmap->description);
+ if (retval) {
+ ext2fs_free_mem(&bitmap);
+ return retval;
+ }
+ strcpy(bitmap->description, descr);
+ } else
+ bitmap->description = 0;
+
+ retval = bitmap->bitmap_ops->new_bmap(fs, bitmap);
+ if (retval) {
+ ext2fs_free_mem(&bitmap->description);
+ ext2fs_free_mem(&bitmap);
+ return retval;
+ }
+
+ *ret = (ext2fs_generic_bitmap) bitmap;
+ return 0;
+}
+
+#ifdef ENABLE_BMAP_STATS
+static void ext2fs_print_bmap_statistics(ext2fs_generic_bitmap_64 bitmap)
+{
+ struct ext2_bmap_statistics *stats = &bitmap->stats;
+#ifdef ENABLE_BMAP_STATS_OPS
+ float mark_seq_perc = 0.0, test_seq_perc = 0.0;
+ float mark_back_perc = 0.0, test_back_perc = 0.0;
+ struct timeval now;
+ double inuse;
+
+ if (stats->test_count) {
+ test_seq_perc = ((float)stats->test_seq /
+ stats->test_count) * 100;
+ test_back_perc = ((float)stats->test_back /
+ stats->test_count) * 100;
+ }
+
+ if (stats->mark_count) {
+ mark_seq_perc = ((float)stats->mark_seq /
+ stats->mark_count) * 100;
+ mark_back_perc = ((float)stats->mark_back /
+ stats->mark_count) * 100;
+ }
+
+ if (gettimeofday(&now, (struct timezone *) NULL) == -1) {
+ perror("gettimeofday");
+ return;
+ }
+
+ inuse = (double) now.tv_sec + \
+ (((double) now.tv_usec) * 0.000001);
+ inuse -= (double) stats->created.tv_sec + \
+ (((double) stats->created.tv_usec) * 0.000001);
+#endif /* ENABLE_BMAP_STATS_OPS */
+
+ fprintf(stderr, "\n[+] %s bitmap (type %d)\n", bitmap->description,
+ stats->type);
+ fprintf(stderr, "=================================================\n");
+#ifdef ENABLE_BMAP_STATS_OPS
+ fprintf(stderr, "%16llu bits long\n",
+ bitmap->real_end - bitmap->start);
+ fprintf(stderr, "%16lu copy_bmap\n%16lu resize_bmap\n",
+ stats->copy_count, stats->resize_count);
+ fprintf(stderr, "%16lu mark bmap\n%16lu unmark_bmap\n",
+ stats->mark_count, stats->unmark_count);
+ fprintf(stderr, "%16lu test_bmap\n%16lu mark_bmap_extent\n",
+ stats->test_count, stats->mark_ext_count);
+ fprintf(stderr, "%16lu unmark_bmap_extent\n"
+ "%16lu test_clear_bmap_extent\n",
+ stats->unmark_ext_count, stats->test_ext_count);
+ fprintf(stderr, "%16lu set_bmap_range\n%16lu set_bmap_range\n",
+ stats->set_range_count, stats->get_range_count);
+ fprintf(stderr, "%16lu clear_bmap\n%16lu contiguous bit test (%.2f%%)\n",
+ stats->clear_count, stats->test_seq, test_seq_perc);
+ fprintf(stderr, "%16lu contiguous bit mark (%.2f%%)\n"
+ "%16llu bits tested backwards (%.2f%%)\n",
+ stats->mark_seq, mark_seq_perc,
+ stats->test_back, test_back_perc);
+ fprintf(stderr, "%16llu bits marked backwards (%.2f%%)\n"
+ "%16.2f seconds in use\n",
+ stats->mark_back, mark_back_perc, inuse);
+#endif /* ENABLE_BMAP_STATS_OPS */
+}
+#endif
+
+void ext2fs_free_generic_bmap(ext2fs_generic_bitmap gen_bmap)
+{
+ ext2fs_generic_bitmap_64 bmap = (ext2fs_generic_bitmap_64) gen_bmap;
+
+ if (!bmap)
+ return;
+
+ if (EXT2FS_IS_32_BITMAP(bmap)) {
+ ext2fs_free_generic_bitmap(gen_bmap);
+ return;
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bmap))
+ return;
+
+#ifdef ENABLE_BMAP_STATS
+ if (getenv("E2FSPROGS_BITMAP_STATS")) {
+ ext2fs_print_bmap_statistics(bmap);
+ bmap->bitmap_ops->print_stats(bmap);
+ }
+#endif
+
+ bmap->bitmap_ops->free_bmap(bmap);
+
+ if (bmap->description) {
+ ext2fs_free_mem(&bmap->description);
+ bmap->description = 0;
+ }
+ bmap->magic = 0;
+ ext2fs_free_mem(&bmap);
+}
+
+errcode_t ext2fs_copy_generic_bmap(ext2fs_generic_bitmap gen_src,
+ ext2fs_generic_bitmap *dest)
+{
+ ext2fs_generic_bitmap_64 src = (ext2fs_generic_bitmap_64) gen_src;
+ char *descr, *new_descr;
+ ext2fs_generic_bitmap_64 new_bmap;
+ errcode_t retval;
+
+ if (!src)
+ return EINVAL;
+
+ if (EXT2FS_IS_32_BITMAP(src))
+ return ext2fs_copy_generic_bitmap(gen_src, dest);
+
+ if (!EXT2FS_IS_64_BITMAP(src))
+ return EINVAL;
+
+ /* Allocate a new bitmap struct */
+ retval = ext2fs_get_memzero(sizeof(struct ext2fs_struct_generic_bitmap_64),
+ &new_bmap);
+ if (retval)
+ return retval;
+
+
+#ifdef ENABLE_BMAP_STATS_OPS
+ src->stats.copy_count++;
+#endif
+#ifdef ENABLE_BMAP_STATS
+ if (gettimeofday(&new_bmap->stats.created,
+ (struct timezone *) NULL) == -1) {
+ perror("gettimeofday");
+ ext2fs_free_mem(&new_bmap);
+ return 1;
+ }
+ new_bmap->stats.type = src->stats.type;
+#endif
+
+ /* Copy all the high-level parts over */
+ new_bmap->magic = src->magic;
+ new_bmap->fs = src->fs;
+ new_bmap->start = src->start;
+ new_bmap->end = src->end;
+ new_bmap->real_end = src->real_end;
+ new_bmap->bitmap_ops = src->bitmap_ops;
+ new_bmap->base_error_code = src->base_error_code;
+ new_bmap->cluster_bits = src->cluster_bits;
+
+ descr = src->description;
+ if (descr) {
+ retval = ext2fs_get_mem(strlen(descr)+10, &new_descr);
+ if (retval) {
+ ext2fs_free_mem(&new_bmap);
+ return retval;
+ }
+ strcpy(new_descr, "copy of ");
+ strcat(new_descr, descr);
+ new_bmap->description = new_descr;
+ }
+
+ retval = src->bitmap_ops->copy_bmap(src, new_bmap);
+ if (retval) {
+ ext2fs_free_mem(&new_bmap->description);
+ ext2fs_free_mem(&new_bmap);
+ return retval;
+ }
+
+ *dest = (ext2fs_generic_bitmap) new_bmap;
+
+ return 0;
+}
+
+errcode_t ext2fs_resize_generic_bmap(ext2fs_generic_bitmap gen_bmap,
+ __u64 new_end,
+ __u64 new_real_end)
+{
+ ext2fs_generic_bitmap_64 bmap = (ext2fs_generic_bitmap_64) gen_bmap;
+
+ if (!bmap)
+ return EINVAL;
+
+ if (EXT2FS_IS_32_BITMAP(bmap))
+ return ext2fs_resize_generic_bitmap(gen_bmap->magic, new_end,
+ new_real_end, gen_bmap);
+
+ if (!EXT2FS_IS_64_BITMAP(bmap))
+ return EINVAL;
+
+ INC_STAT(bmap, resize_count);
+
+ return bmap->bitmap_ops->resize_bmap(bmap, new_end, new_real_end);
+}
+
+errcode_t ext2fs_fudge_generic_bmap_end(ext2fs_generic_bitmap gen_bitmap,
+ errcode_t neq,
+ __u64 end, __u64 *oend)
+{
+ ext2fs_generic_bitmap_64 bitmap = (ext2fs_generic_bitmap_64) gen_bitmap;
+
+ if (!bitmap)
+ return EINVAL;
+
+ if (EXT2FS_IS_32_BITMAP(bitmap)) {
+ ext2_ino_t tmp_oend;
+ int retval;
+
+ retval = ext2fs_fudge_generic_bitmap_end(gen_bitmap,
+ bitmap->magic,
+ neq, end, &tmp_oend);
+ if (oend)
+ *oend = tmp_oend;
+ return retval;
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bitmap))
+ return EINVAL;
+
+ if (end > bitmap->real_end)
+ return neq;
+ if (oend)
+ *oend = bitmap->end;
+ bitmap->end = end;
+ return 0;
+}
+
+__u64 ext2fs_get_generic_bmap_start(ext2fs_generic_bitmap gen_bitmap)
+{
+ ext2fs_generic_bitmap_64 bitmap = (ext2fs_generic_bitmap_64) gen_bitmap;
+
+ if (!bitmap)
+ return EINVAL;
+
+ if (EXT2FS_IS_32_BITMAP(bitmap))
+ return ext2fs_get_generic_bitmap_start(gen_bitmap);
+
+ if (!EXT2FS_IS_64_BITMAP(bitmap))
+ return EINVAL;
+
+ return bitmap->start;
+}
+
+__u64 ext2fs_get_generic_bmap_end(ext2fs_generic_bitmap gen_bitmap)
+{
+ ext2fs_generic_bitmap_64 bitmap = (ext2fs_generic_bitmap_64) gen_bitmap;
+
+ if (!bitmap)
+ return EINVAL;
+
+ if (EXT2FS_IS_32_BITMAP(bitmap))
+ return ext2fs_get_generic_bitmap_end(gen_bitmap);
+
+ if (!EXT2FS_IS_64_BITMAP(bitmap))
+ return EINVAL;
+
+ return bitmap->end;
+}
+
+void ext2fs_clear_generic_bmap(ext2fs_generic_bitmap gen_bitmap)
+{
+ ext2fs_generic_bitmap_64 bitmap = (ext2fs_generic_bitmap_64) gen_bitmap;
+
+ if (EXT2FS_IS_32_BITMAP(bitmap))
+ ext2fs_clear_generic_bitmap(gen_bitmap);
+ else
+ bitmap->bitmap_ops->clear_bmap(bitmap);
+}
+
+int ext2fs_mark_generic_bmap(ext2fs_generic_bitmap gen_bitmap,
+ __u64 arg)
+{
+ ext2fs_generic_bitmap_64 bitmap = (ext2fs_generic_bitmap_64) gen_bitmap;
+
+ if (!bitmap)
+ return 0;
+
+ if (EXT2FS_IS_32_BITMAP(bitmap)) {
+ if (arg & ~0xffffffffULL) {
+ ext2fs_warn_bitmap2(gen_bitmap,
+ EXT2FS_MARK_ERROR, 0xffffffff);
+ return 0;
+ }
+ return ext2fs_mark_generic_bitmap(gen_bitmap, arg);
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bitmap))
+ return 0;
+
+ arg >>= bitmap->cluster_bits;
+
+#ifdef ENABLE_BMAP_STATS_OPS
+ if (arg == bitmap->stats.last_marked + 1)
+ bitmap->stats.mark_seq++;
+ if (arg < bitmap->stats.last_marked)
+ bitmap->stats.mark_back++;
+ bitmap->stats.last_marked = arg;
+ bitmap->stats.mark_count++;
+#endif
+
+ if ((arg < bitmap->start) || (arg > bitmap->end)) {
+ warn_bitmap(bitmap, EXT2FS_MARK_ERROR, arg);
+ return 0;
+ }
+
+ return bitmap->bitmap_ops->mark_bmap(bitmap, arg);
+}
+
+int ext2fs_unmark_generic_bmap(ext2fs_generic_bitmap gen_bitmap,
+ __u64 arg)
+{
+ ext2fs_generic_bitmap_64 bitmap = (ext2fs_generic_bitmap_64) gen_bitmap;
+
+ if (!bitmap)
+ return 0;
+
+ if (EXT2FS_IS_32_BITMAP(bitmap)) {
+ if (arg & ~0xffffffffULL) {
+ ext2fs_warn_bitmap2(gen_bitmap, EXT2FS_UNMARK_ERROR,
+ 0xffffffff);
+ return 0;
+ }
+ return ext2fs_unmark_generic_bitmap(gen_bitmap, arg);
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bitmap))
+ return 0;
+
+ arg >>= bitmap->cluster_bits;
+
+ INC_STAT(bitmap, unmark_count);
+
+ if ((arg < bitmap->start) || (arg > bitmap->end)) {
+ warn_bitmap(bitmap, EXT2FS_UNMARK_ERROR, arg);
+ return 0;
+ }
+
+ return bitmap->bitmap_ops->unmark_bmap(bitmap, arg);
+}
+
+int ext2fs_test_generic_bmap(ext2fs_generic_bitmap gen_bitmap,
+ __u64 arg)
+{
+ ext2fs_generic_bitmap_64 bitmap = (ext2fs_generic_bitmap_64) gen_bitmap;
+ if (!bitmap)
+ return 0;
+
+ if (EXT2FS_IS_32_BITMAP(bitmap)) {
+ if (arg & ~0xffffffffULL) {
+ ext2fs_warn_bitmap2(gen_bitmap, EXT2FS_TEST_ERROR,
+ 0xffffffff);
+ return 0;
+ }
+ return ext2fs_test_generic_bitmap(gen_bitmap, arg);
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bitmap))
+ return 0;
+
+ arg >>= bitmap->cluster_bits;
+
+#ifdef ENABLE_BMAP_STATS_OPS
+ bitmap->stats.test_count++;
+ if (arg == bitmap->stats.last_tested + 1)
+ bitmap->stats.test_seq++;
+ if (arg < bitmap->stats.last_tested)
+ bitmap->stats.test_back++;
+ bitmap->stats.last_tested = arg;
+#endif
+
+ if ((arg < bitmap->start) || (arg > bitmap->end)) {
+ warn_bitmap(bitmap, EXT2FS_TEST_ERROR, arg);
+ return 0;
+ }
+
+ return bitmap->bitmap_ops->test_bmap(bitmap, arg);
+}
+
+errcode_t ext2fs_set_generic_bmap_range(ext2fs_generic_bitmap gen_bmap,
+ __u64 start, unsigned int num,
+ void *in)
+{
+ ext2fs_generic_bitmap_64 bmap = (ext2fs_generic_bitmap_64) gen_bmap;
+
+ if (!bmap)
+ return EINVAL;
+
+ if (EXT2FS_IS_32_BITMAP(bmap)) {
+ if ((start+num-1) & ~0xffffffffULL) {
+ ext2fs_warn_bitmap2(gen_bmap, EXT2FS_UNMARK_ERROR,
+ 0xffffffff);
+ return EINVAL;
+ }
+ return ext2fs_set_generic_bitmap_range(gen_bmap, bmap->magic,
+ start, num, in);
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bmap))
+ return EINVAL;
+
+ INC_STAT(bmap, set_range_count);
+
+ return bmap->bitmap_ops->set_bmap_range(bmap, start, num, in);
+}
+
+errcode_t ext2fs_get_generic_bmap_range(ext2fs_generic_bitmap gen_bmap,
+ __u64 start, unsigned int num,
+ void *out)
+{
+ ext2fs_generic_bitmap_64 bmap = (ext2fs_generic_bitmap_64) gen_bmap;
+
+ if (!bmap)
+ return EINVAL;
+
+ if (EXT2FS_IS_32_BITMAP(bmap)) {
+ if ((start+num-1) & ~0xffffffffULL) {
+ ext2fs_warn_bitmap2(gen_bmap,
+ EXT2FS_UNMARK_ERROR, 0xffffffff);
+ return EINVAL;
+ }
+ return ext2fs_get_generic_bitmap_range(gen_bmap, bmap->magic,
+ start, num, out);
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bmap))
+ return EINVAL;
+
+ INC_STAT(bmap, get_range_count);
+
+ return bmap->bitmap_ops->get_bmap_range(bmap, start, num, out);
+}
+
+errcode_t ext2fs_compare_generic_bmap(errcode_t neq,
+ ext2fs_generic_bitmap gen_bm1,
+ ext2fs_generic_bitmap gen_bm2)
+{
+ ext2fs_generic_bitmap_64 bm1 = (ext2fs_generic_bitmap_64) gen_bm1;
+ ext2fs_generic_bitmap_64 bm2 = (ext2fs_generic_bitmap_64) gen_bm2;
+ blk64_t i;
+
+ if (!bm1 || !bm2)
+ return EINVAL;
+ if (bm1->magic != bm2->magic)
+ return EINVAL;
+
+ /* Now we know both bitmaps have the same magic */
+ if (EXT2FS_IS_32_BITMAP(bm1))
+ return ext2fs_compare_generic_bitmap(bm1->magic, neq,
+ gen_bm1, gen_bm2);
+
+ if (!EXT2FS_IS_64_BITMAP(bm1))
+ return EINVAL;
+
+ if ((bm1->start != bm2->start) ||
+ (bm1->end != bm2->end))
+ return neq;
+
+ for (i = bm1->start; i < bm1->end; i++) {
+ int ret1, ret2;
+ ret1 = !!ext2fs_test_generic_bmap(gen_bm1, i);
+ ret2 = !!ext2fs_test_generic_bmap(gen_bm2, i);
+ if (ret1 != ret2) {
+ return neq;
+ }
+ }
+
+ return 0;
+}
+
+void ext2fs_set_generic_bmap_padding(ext2fs_generic_bitmap gen_bmap)
+{
+ ext2fs_generic_bitmap_64 bmap = (ext2fs_generic_bitmap_64) gen_bmap;
+ __u64 start, num;
+
+ if (EXT2FS_IS_32_BITMAP(bmap)) {
+ ext2fs_set_generic_bitmap_padding(gen_bmap);
+ return;
+ }
+
+ start = bmap->end + 1;
+ num = bmap->real_end - bmap->end;
+ bmap->bitmap_ops->mark_bmap_extent(bmap, start, num);
+ /* XXX ought to warn on error */
+}
+
+int ext2fs_test_block_bitmap_range2(ext2fs_block_bitmap gen_bmap,
+ blk64_t block, unsigned int num)
+{
+ ext2fs_generic_bitmap_64 bmap = (ext2fs_generic_bitmap_64) gen_bmap;
+ __u64 end = block + num;
+
+ if (!bmap)
+ return EINVAL;
+
+ if (num == 1)
+ return !ext2fs_test_generic_bmap((ext2fs_generic_bitmap)
+ bmap, block);
+
+ if (EXT2FS_IS_32_BITMAP(bmap)) {
+ if ((block & ~0xffffffffULL) ||
+ ((block+num-1) & ~0xffffffffULL)) {
+ ext2fs_warn_bitmap2((ext2fs_generic_bitmap) bmap,
+ EXT2FS_UNMARK_ERROR, 0xffffffff);
+ return EINVAL;
+ }
+ return ext2fs_test_block_bitmap_range(
+ (ext2fs_generic_bitmap) bmap, block, num);
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bmap))
+ return EINVAL;
+
+ INC_STAT(bmap, test_ext_count);
+
+ /* convert to clusters if necessary */
+ block >>= bmap->cluster_bits;
+ end += (1ULL << bmap->cluster_bits) - 1;
+ end >>= bmap->cluster_bits;
+ num = end - block;
+
+ if ((block < bmap->start) || (block > bmap->end) ||
+ (block+num-1 > bmap->end)) {
+ ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST, block,
+ bmap->description);
+ return EINVAL;
+ }
+
+ return bmap->bitmap_ops->test_clear_bmap_extent(bmap, block, num);
+}
+
+void ext2fs_mark_block_bitmap_range2(ext2fs_block_bitmap gen_bmap,
+ blk64_t block, unsigned int num)
+{
+ ext2fs_generic_bitmap_64 bmap = (ext2fs_generic_bitmap_64) gen_bmap;
+ __u64 end = block + num;
+
+ if (!bmap)
+ return;
+
+ if (EXT2FS_IS_32_BITMAP(bmap)) {
+ if ((block & ~0xffffffffULL) ||
+ ((block+num-1) & ~0xffffffffULL)) {
+ ext2fs_warn_bitmap2((ext2fs_generic_bitmap) bmap,
+ EXT2FS_UNMARK_ERROR, 0xffffffff);
+ return;
+ }
+ ext2fs_mark_block_bitmap_range((ext2fs_generic_bitmap) bmap,
+ block, num);
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bmap))
+ return;
+
+ INC_STAT(bmap, mark_ext_count);
+
+ /* convert to clusters if necessary */
+ block >>= bmap->cluster_bits;
+ end += (1ULL << bmap->cluster_bits) - 1;
+ end >>= bmap->cluster_bits;
+ num = end - block;
+
+ if ((block < bmap->start) || (block > bmap->end) ||
+ (block+num-1 > bmap->end)) {
+ ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block,
+ bmap->description);
+ return;
+ }
+
+ bmap->bitmap_ops->mark_bmap_extent(bmap, block, num);
+}
+
+void ext2fs_unmark_block_bitmap_range2(ext2fs_block_bitmap gen_bmap,
+ blk64_t block, unsigned int num)
+{
+ ext2fs_generic_bitmap_64 bmap = (ext2fs_generic_bitmap_64) gen_bmap;
+ __u64 end = block + num;
+
+ if (!bmap)
+ return;
+
+ if (EXT2FS_IS_32_BITMAP(bmap)) {
+ if ((block & ~0xffffffffULL) ||
+ ((block+num-1) & ~0xffffffffULL)) {
+ ext2fs_warn_bitmap2((ext2fs_generic_bitmap) bmap,
+ EXT2FS_UNMARK_ERROR, 0xffffffff);
+ return;
+ }
+ ext2fs_unmark_block_bitmap_range((ext2fs_generic_bitmap) bmap,
+ block, num);
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bmap))
+ return;
+
+ INC_STAT(bmap, unmark_ext_count);
+
+ /* convert to clusters if necessary */
+ block >>= bmap->cluster_bits;
+ end += (1ULL << bmap->cluster_bits) - 1;
+ end >>= bmap->cluster_bits;
+ num = end - block;
+
+ if ((block < bmap->start) || (block > bmap->end) ||
+ (block+num-1 > bmap->end)) {
+ ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block,
+ bmap->description);
+ return;
+ }
+
+ bmap->bitmap_ops->unmark_bmap_extent(bmap, block, num);
+}
+
+void ext2fs_warn_bitmap32(ext2fs_generic_bitmap gen_bitmap, const char *func)
+{
+ ext2fs_generic_bitmap_64 bitmap = (ext2fs_generic_bitmap_64) gen_bitmap;
+
+#ifndef OMIT_COM_ERR
+ if (bitmap && bitmap->description)
+ com_err(0, EXT2_ET_MAGIC_GENERIC_BITMAP,
+ "called %s with 64-bit bitmap for %s", func,
+ bitmap->description);
+ else
+ com_err(0, EXT2_ET_MAGIC_GENERIC_BITMAP,
+ "called %s with 64-bit bitmap", func);
+#endif
+}
+
+errcode_t ext2fs_convert_subcluster_bitmap(ext2_filsys fs,
+ ext2fs_block_bitmap *bitmap)
+{
+ ext2fs_generic_bitmap_64 bmap, cmap;
+ ext2fs_block_bitmap gen_bmap = *bitmap, gen_cmap;
+ errcode_t retval;
+ blk64_t i, next, b_end, c_end;
+
+ bmap = (ext2fs_generic_bitmap_64) gen_bmap;
+ if (fs->cluster_ratio_bits == ext2fs_get_bitmap_granularity(gen_bmap))
+ return 0; /* Nothing to do */
+
+ retval = ext2fs_allocate_block_bitmap(fs, "converted cluster bitmap",
+ &gen_cmap);
+ if (retval)
+ return retval;
+
+ cmap = (ext2fs_generic_bitmap_64) gen_cmap;
+ i = bmap->start;
+ b_end = bmap->end;
+ bmap->end = bmap->real_end;
+ c_end = cmap->end;
+ cmap->end = cmap->real_end;
+ while (i < bmap->real_end) {
+ retval = ext2fs_find_first_set_block_bitmap2(gen_bmap,
+ i, bmap->real_end, &next);
+ if (retval)
+ break;
+ ext2fs_mark_block_bitmap2(gen_cmap, next);
+ i = EXT2FS_C2B(fs, EXT2FS_B2C(fs, next) + 1);
+ }
+ bmap->end = b_end;
+ cmap->end = c_end;
+ ext2fs_free_block_bitmap(gen_bmap);
+ *bitmap = (ext2fs_block_bitmap) cmap;
+ return 0;
+}
+
+errcode_t ext2fs_find_first_zero_generic_bmap(ext2fs_generic_bitmap bitmap,
+ __u64 start, __u64 end, __u64 *out)
+{
+ ext2fs_generic_bitmap_64 bmap64 = (ext2fs_generic_bitmap_64) bitmap;
+ __u64 cstart, cend, cout;
+ errcode_t retval;
+
+ if (!bitmap)
+ return EINVAL;
+
+ if (EXT2FS_IS_32_BITMAP(bitmap)) {
+ blk_t blk = 0;
+
+ if (((start) & ~0xffffffffULL) ||
+ ((end) & ~0xffffffffULL)) {
+ ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, start);
+ return EINVAL;
+ }
+
+ retval = ext2fs_find_first_zero_generic_bitmap(bitmap, start,
+ end, &blk);
+ if (retval == 0)
+ *out = blk;
+ return retval;
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bitmap))
+ return EINVAL;
+
+ cstart = start >> bmap64->cluster_bits;
+ cend = end >> bmap64->cluster_bits;
+
+ if (cstart < bmap64->start || cend > bmap64->end || start > end) {
+ warn_bitmap(bmap64, EXT2FS_TEST_ERROR, start);
+ return EINVAL;
+ }
+
+ if (bmap64->bitmap_ops->find_first_zero) {
+ retval = bmap64->bitmap_ops->find_first_zero(bmap64, cstart,
+ cend, &cout);
+ if (retval)
+ return retval;
+ found:
+ cout <<= bmap64->cluster_bits;
+ *out = (cout >= start) ? cout : start;
+ return 0;
+ }
+
+ for (cout = cstart; cout <= cend; cout++)
+ if (!bmap64->bitmap_ops->test_bmap(bmap64, cout))
+ goto found;
+
+ return ENOENT;
+}
+
+errcode_t ext2fs_find_first_set_generic_bmap(ext2fs_generic_bitmap bitmap,
+ __u64 start, __u64 end, __u64 *out)
+{
+ ext2fs_generic_bitmap_64 bmap64 = (ext2fs_generic_bitmap_64) bitmap;
+ __u64 cstart, cend, cout;
+ errcode_t retval;
+
+ if (!bitmap)
+ return EINVAL;
+
+ if (EXT2FS_IS_32_BITMAP(bitmap)) {
+ blk_t blk = 0;
+
+ if (((start) & ~0xffffffffULL) ||
+ ((end) & ~0xffffffffULL)) {
+ ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, start);
+ return EINVAL;
+ }
+
+ retval = ext2fs_find_first_set_generic_bitmap(bitmap, start,
+ end, &blk);
+ if (retval == 0)
+ *out = blk;
+ return retval;
+ }
+
+ if (!EXT2FS_IS_64_BITMAP(bitmap))
+ return EINVAL;
+
+ cstart = start >> bmap64->cluster_bits;
+ cend = end >> bmap64->cluster_bits;
+
+ if (cstart < bmap64->start || cend > bmap64->end || start > end) {
+ warn_bitmap(bmap64, EXT2FS_TEST_ERROR, start);
+ return EINVAL;
+ }
+
+ if (bmap64->bitmap_ops->find_first_set) {
+ retval = bmap64->bitmap_ops->find_first_set(bmap64, cstart,
+ cend, &cout);
+ if (retval)
+ return retval;
+ found:
+ cout <<= bmap64->cluster_bits;
+ *out = (cout >= start) ? cout : start;
+ return 0;
+ }
+
+ for (cout = cstart; cout <= cend; cout++)
+ if (bmap64->bitmap_ops->test_bmap(bmap64, cout))
+ goto found;
+
+ return ENOENT;
+}
+
+errcode_t ext2fs_count_used_clusters(ext2_filsys fs, blk64_t start,
+ blk64_t end, blk64_t *out)
+{
+ blk64_t next;
+ blk64_t tot_set = 0;
+ errcode_t retval = 0;
+
+ while (start < end) {
+ retval = ext2fs_find_first_set_block_bitmap2(fs->block_map,
+ start, end, &next);
+ if (retval) {
+ if (retval == ENOENT)
+ retval = 0;
+ break;
+ }
+ start = next;
+
+ retval = ext2fs_find_first_zero_block_bitmap2(fs->block_map,
+ start, end, &next);
+ if (retval == 0) {
+ tot_set += next - start;
+ start = next + 1;
+ } else if (retval == ENOENT) {
+ retval = 0;
+ tot_set += end - start + 1;
+ break;
+ } else
+ break;
+ }
+
+ if (!retval)
+ *out = EXT2FS_NUM_B2C(fs, tot_set);
+ return retval;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 17:00:20 +0000