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-rw-r--r--ANDROID_3.4.5/fs/reiserfs/objectid.c202
1 files changed, 0 insertions, 202 deletions
diff --git a/ANDROID_3.4.5/fs/reiserfs/objectid.c b/ANDROID_3.4.5/fs/reiserfs/objectid.c
deleted file mode 100644
index f732d6a5..00000000
--- a/ANDROID_3.4.5/fs/reiserfs/objectid.c
+++ /dev/null
@@ -1,202 +0,0 @@
-/*
- * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
- */
-
-#include <linux/string.h>
-#include <linux/random.h>
-#include <linux/time.h>
-#include "reiserfs.h"
-
-// find where objectid map starts
-#define objectid_map(s,rs) (old_format_only (s) ? \
- (__le32 *)((struct reiserfs_super_block_v1 *)(rs) + 1) :\
- (__le32 *)((rs) + 1))
-
-#ifdef CONFIG_REISERFS_CHECK
-
-static void check_objectid_map(struct super_block *s, __le32 * map)
-{
- if (le32_to_cpu(map[0]) != 1)
- reiserfs_panic(s, "vs-15010", "map corrupted: %lx",
- (long unsigned int)le32_to_cpu(map[0]));
-
- // FIXME: add something else here
-}
-
-#else
-static void check_objectid_map(struct super_block *s, __le32 * map)
-{;
-}
-#endif
-
-/* When we allocate objectids we allocate the first unused objectid.
- Each sequence of objectids in use (the odd sequences) is followed
- by a sequence of objectids not in use (the even sequences). We
- only need to record the last objectid in each of these sequences
- (both the odd and even sequences) in order to fully define the
- boundaries of the sequences. A consequence of allocating the first
- objectid not in use is that under most conditions this scheme is
- extremely compact. The exception is immediately after a sequence
- of operations which deletes a large number of objects of
- non-sequential objectids, and even then it will become compact
- again as soon as more objects are created. Note that many
- interesting optimizations of layout could result from complicating
- objectid assignment, but we have deferred making them for now. */
-
-/* get unique object identifier */
-__u32 reiserfs_get_unused_objectid(struct reiserfs_transaction_handle *th)
-{
- struct super_block *s = th->t_super;
- struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
- __le32 *map = objectid_map(s, rs);
- __u32 unused_objectid;
-
- BUG_ON(!th->t_trans_id);
-
- check_objectid_map(s, map);
-
- reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
- /* comment needed -Hans */
- unused_objectid = le32_to_cpu(map[1]);
- if (unused_objectid == U32_MAX) {
- reiserfs_warning(s, "reiserfs-15100", "no more object ids");
- reiserfs_restore_prepared_buffer(s, SB_BUFFER_WITH_SB(s));
- return 0;
- }
-
- /* This incrementation allocates the first unused objectid. That
- is to say, the first entry on the objectid map is the first
- unused objectid, and by incrementing it we use it. See below
- where we check to see if we eliminated a sequence of unused
- objectids.... */
- map[1] = cpu_to_le32(unused_objectid + 1);
-
- /* Now we check to see if we eliminated the last remaining member of
- the first even sequence (and can eliminate the sequence by
- eliminating its last objectid from oids), and can collapse the
- first two odd sequences into one sequence. If so, then the net
- result is to eliminate a pair of objectids from oids. We do this
- by shifting the entire map to the left. */
- if (sb_oid_cursize(rs) > 2 && map[1] == map[2]) {
- memmove(map + 1, map + 3,
- (sb_oid_cursize(rs) - 3) * sizeof(__u32));
- set_sb_oid_cursize(rs, sb_oid_cursize(rs) - 2);
- }
-
- journal_mark_dirty(th, s, SB_BUFFER_WITH_SB(s));
- return unused_objectid;
-}
-
-/* makes object identifier unused */
-void reiserfs_release_objectid(struct reiserfs_transaction_handle *th,
- __u32 objectid_to_release)
-{
- struct super_block *s = th->t_super;
- struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
- __le32 *map = objectid_map(s, rs);
- int i = 0;
-
- BUG_ON(!th->t_trans_id);
- //return;
- check_objectid_map(s, map);
-
- reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
- journal_mark_dirty(th, s, SB_BUFFER_WITH_SB(s));
-
- /* start at the beginning of the objectid map (i = 0) and go to
- the end of it (i = disk_sb->s_oid_cursize). Linear search is
- what we use, though it is possible that binary search would be
- more efficient after performing lots of deletions (which is
- when oids is large.) We only check even i's. */
- while (i < sb_oid_cursize(rs)) {
- if (objectid_to_release == le32_to_cpu(map[i])) {
- /* This incrementation unallocates the objectid. */
- //map[i]++;
- le32_add_cpu(&map[i], 1);
-
- /* Did we unallocate the last member of an odd sequence, and can shrink oids? */
- if (map[i] == map[i + 1]) {
- /* shrink objectid map */
- memmove(map + i, map + i + 2,
- (sb_oid_cursize(rs) - i -
- 2) * sizeof(__u32));
- //disk_sb->s_oid_cursize -= 2;
- set_sb_oid_cursize(rs, sb_oid_cursize(rs) - 2);
-
- RFALSE(sb_oid_cursize(rs) < 2 ||
- sb_oid_cursize(rs) > sb_oid_maxsize(rs),
- "vs-15005: objectid map corrupted cur_size == %d (max == %d)",
- sb_oid_cursize(rs), sb_oid_maxsize(rs));
- }
- return;
- }
-
- if (objectid_to_release > le32_to_cpu(map[i]) &&
- objectid_to_release < le32_to_cpu(map[i + 1])) {
- /* size of objectid map is not changed */
- if (objectid_to_release + 1 == le32_to_cpu(map[i + 1])) {
- //objectid_map[i+1]--;
- le32_add_cpu(&map[i + 1], -1);
- return;
- }
-
- /* JDM comparing two little-endian values for equality -- safe */
- if (sb_oid_cursize(rs) == sb_oid_maxsize(rs)) {
- /* objectid map must be expanded, but there is no space */
- PROC_INFO_INC(s, leaked_oid);
- return;
- }
-
- /* expand the objectid map */
- memmove(map + i + 3, map + i + 1,
- (sb_oid_cursize(rs) - i - 1) * sizeof(__u32));
- map[i + 1] = cpu_to_le32(objectid_to_release);
- map[i + 2] = cpu_to_le32(objectid_to_release + 1);
- set_sb_oid_cursize(rs, sb_oid_cursize(rs) + 2);
- return;
- }
- i += 2;
- }
-
- reiserfs_error(s, "vs-15011", "tried to free free object id (%lu)",
- (long unsigned)objectid_to_release);
-}
-
-int reiserfs_convert_objectid_map_v1(struct super_block *s)
-{
- struct reiserfs_super_block *disk_sb = SB_DISK_SUPER_BLOCK(s);
- int cur_size = sb_oid_cursize(disk_sb);
- int new_size = (s->s_blocksize - SB_SIZE) / sizeof(__u32) / 2 * 2;
- int old_max = sb_oid_maxsize(disk_sb);
- struct reiserfs_super_block_v1 *disk_sb_v1;
- __le32 *objectid_map, *new_objectid_map;
- int i;
-
- disk_sb_v1 =
- (struct reiserfs_super_block_v1 *)(SB_BUFFER_WITH_SB(s)->b_data);
- objectid_map = (__le32 *) (disk_sb_v1 + 1);
- new_objectid_map = (__le32 *) (disk_sb + 1);
-
- if (cur_size > new_size) {
- /* mark everyone used that was listed as free at the end of the objectid
- ** map
- */
- objectid_map[new_size - 1] = objectid_map[cur_size - 1];
- set_sb_oid_cursize(disk_sb, new_size);
- }
- /* move the smaller objectid map past the end of the new super */
- for (i = new_size - 1; i >= 0; i--) {
- objectid_map[i + (old_max - new_size)] = objectid_map[i];
- }
-
- /* set the max size so we don't overflow later */
- set_sb_oid_maxsize(disk_sb, new_size);
-
- /* Zero out label and generate random UUID */
- memset(disk_sb->s_label, 0, sizeof(disk_sb->s_label));
- generate_random_uuid(disk_sb->s_uuid);
-
- /* finally, zero out the unused chunk of the new super */
- memset(disk_sb->s_unused, 0, sizeof(disk_sb->s_unused));
- return 0;
-}