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Message-Id: <1592494074-28991-21-git-send-email-wangshilong1991@gmail.com>
Date: Fri, 19 Jun 2020 00:27:23 +0900
From: Wang Shilong <wangshilong1991@...il.com>
To: linux-ext4@...r.kernel.org
Cc: lixi@....com, adilger@...ger.ca, wangshilong1991@...il.com,
sihara@....com, Wang Shilong <wshilong@....com>
Subject: [RFC PATCH v2 20/51] e2fsck: merge dir_info after thread finishes
From: Li Xi <lixi@....com>
Signed-off-by: Li Xi <lixi@....com>
Signed-off-by: Wang Shilong <wshilong@....com>
---
e2fsck/dirinfo.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++
e2fsck/e2fsck.h | 2 ++
e2fsck/pass1.c | 20 +++++++++++++++
3 files changed, 88 insertions(+)
diff --git a/e2fsck/dirinfo.c b/e2fsck/dirinfo.c
index f299620f..ea2fc75b 100644
--- a/e2fsck/dirinfo.c
+++ b/e2fsck/dirinfo.c
@@ -168,6 +168,72 @@ e2fsck_dir_info_min_larger_equal(struct dir_info_db *dir_info,
return -ENOENT;
}
+/*
+ * Merge two sorted dir info to @dest
+ */
+void e2fsck_merge_dir_info(e2fsck_t ctx, struct dir_info_db *src,
+ struct dir_info_db *dest)
+{
+ int size_dir_info = sizeof(struct dir_info);
+ ext2_ino_t size = dest->size;
+ struct dir_info *src_array = src->array;
+ struct dir_info *dest_array = dest->array;
+ ext2_ino_t src_count = src->count;
+ ext2_ino_t dest_count = dest->count;
+ ext2_ino_t total_count = src_count + dest_count;
+ struct dir_info *array;
+ struct dir_info *array_ptr;
+ ext2_ino_t src_index = 0;
+ ext2_ino_t dest_index = 0;
+
+ if (src->count == 0)
+ return;
+
+ if (size < total_count)
+ size = total_count;
+
+ if (size < src->size)
+ size = src->size;
+
+ array = e2fsck_allocate_memory(ctx, size * size_dir_info,
+ "directory map");
+ array_ptr = array;
+ /*
+ * This can be improved by binary search and memcpy, but codes
+ * would be complexer. And if the groups distributed to each
+ * thread are stided, this implementation won't be too bad comparing
+ * to the optimiztion.
+ */
+ while (src_index < src_count || dest_index < dest_count) {
+ if (src_index >= src_count) {
+ memcpy(array_ptr, &dest_array[dest_index],
+ (dest_count - dest_index) * size_dir_info);
+ break;
+ }
+ if (dest_index >= dest_count) {
+ memcpy(array_ptr, &src_array[src_index],
+ (src_count - src_index) * size_dir_info);
+ break;
+ }
+ if (src_array[src_index].ino < dest_array[dest_index].ino) {
+ *array_ptr = src_array[src_index];
+ src_index++;
+ } else {
+ assert(src_array[src_index].ino >
+ dest_array[dest_index].ino);
+ *array_ptr = dest_array[dest_index];
+ dest_index++;
+ }
+ array_ptr++;
+ }
+
+ if (dest->array)
+ ext2fs_free_mem(&dest->array);
+ dest->array = array;
+ dest->size = size;
+ dest->count = total_count;
+}
+
/*
*
* Insert an inode into the sorted array. The array should have at least one
diff --git a/e2fsck/e2fsck.h b/e2fsck/e2fsck.h
index 121d1b9b..24f164a7 100644
--- a/e2fsck/e2fsck.h
+++ b/e2fsck/e2fsck.h
@@ -502,6 +502,8 @@ extern void read_bad_blocks_file(e2fsck_t ctx, const char *bad_blocks_file,
/* dirinfo.c */
extern void e2fsck_add_dir_info(e2fsck_t ctx, ext2_ino_t ino, ext2_ino_t parent);
+void e2fsck_merge_dir_info(e2fsck_t ctx, struct dir_info_db *src,
+ struct dir_info_db *dest);
extern void e2fsck_free_dir_info(e2fsck_t ctx);
extern int e2fsck_get_num_dirinfo(e2fsck_t ctx);
extern struct dir_info_iter *e2fsck_dir_info_iter_begin(e2fsck_t ctx);
diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index 85444421..7a839d4b 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -2413,6 +2413,22 @@ out_context:
return retval;
}
+static void e2fsck_pass1_merge_dir_info(e2fsck_t global_ctx, e2fsck_t thread_ctx)
+{
+ if (thread_ctx->dir_info == NULL)
+ return;
+
+ if (global_ctx->dir_info == NULL) {
+ /* TODO: tdb needs to be handled properly */
+ global_ctx->dir_info = thread_ctx->dir_info;
+ thread_ctx->dir_info = NULL;
+ return;
+ }
+
+ e2fsck_merge_dir_info(global_ctx, thread_ctx->dir_info,
+ global_ctx->dir_info);
+}
+
static int e2fsck_pass1_thread_join_one(e2fsck_t global_ctx, e2fsck_t thread_ctx)
{
errcode_t retval;
@@ -2421,6 +2437,7 @@ static int e2fsck_pass1_thread_join_one(e2fsck_t global_ctx, e2fsck_t thread_ctx
ext2_filsys global_fs = global_ctx->fs;
FILE *global_logf = global_ctx->logf;
FILE *global_problem_logf = global_ctx->problem_logf;
+ struct dir_info_db *dir_info = global_ctx->dir_info;
ext2fs_inode_bitmap inode_used_map = global_ctx->inode_used_map;
ext2fs_inode_bitmap inode_dir_map = global_ctx->inode_dir_map;
ext2fs_inode_bitmap inode_bb_map = global_ctx->inode_bb_map;
@@ -2452,6 +2469,8 @@ static int e2fsck_pass1_thread_join_one(e2fsck_t global_ctx, e2fsck_t thread_ctx
global_ctx->block_dup_map = block_dup_map;
global_ctx->block_ea_map = block_ea_map;
global_ctx->block_metadata_map = block_metadata_map;
+ global_ctx->dir_info = dir_info;
+ e2fsck_pass1_merge_dir_info(global_ctx, thread_ctx);
/* Keep the global singal flags*/
global_ctx->flags |= (flags & E2F_FLAG_SIGNAL_MASK) |
@@ -2508,6 +2527,7 @@ static int e2fsck_pass1_thread_join(e2fsck_t global_ctx, e2fsck_t thread_ctx)
PASS1_FREE_CTX_BITMAP(thread_ctx, block_dup_map);
PASS1_FREE_CTX_BITMAP(thread_ctx, block_ea_map);
PASS1_FREE_CTX_BITMAP(thread_ctx, block_metadata_map);
+ e2fsck_free_dir_info(thread_ctx);
ext2fs_free_mem(&thread_ctx);
return retval;
--
2.25.4
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