linux-ext4 - [RFC PATCH v2 32/51] e2fsck: split and merge quota context

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Date:   Fri, 19 Jun 2020 00:27:35 +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 32/51] e2fsck: split and merge quota context

From: Wang Shilong <wshilong@....com>

Every threads calculate its own quota accounting,
merge them after threads finish.

Signed-off-by: Wang Shilong <wshilong@....com>
---
 e2fsck/pass1.c        | 23 +++++++++++++++++++++++
 lib/support/mkquota.c | 19 +++++++++++++++++++
 lib/support/quotaio.h |  2 ++
 3 files changed, 44 insertions(+)

diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index 182e1cd8..645666cc 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -56,6 +56,7 @@
 #include <e2p/e2p.h>
 
 #include "problem.h"
+#include "support/dict.h"
 
 #ifdef NO_INLINE_FUNCS
 #define _INLINE_
@@ -2429,6 +2430,11 @@ static errcode_t e2fsck_pass1_thread_prepare(e2fsck_t global_ctx,
 		log_out(thread_context, _("Scan group range [%d, %d)\n"),
 			tinfo->et_group_start, tinfo->et_group_end);
 	thread_context->fs = thread_fs;
+	retval = quota_init_context(&thread_context->qctx, thread_fs, 0);
+	if (retval) {
+		com_err(global_ctx->program_name, retval, "while init quota context");
+		goto out_fs;
+	}
 	*thread_ctx = thread_context;
 	return 0;
 out_fs:
@@ -2515,6 +2521,20 @@ static int e2fsck_pass1_merge_dirs_to_hash(e2fsck_t global_ctx, e2fsck_t thread_
 	return retval;
 }
 
+static void e2fsck_pass1_merge_quota_ctx(e2fsck_t global_ctx, e2fsck_t thread_ctx)
+{
+	dict_t *dict;
+	enum quota_type	qtype;
+
+	for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+		dict = thread_ctx->qctx->quota_dict[qtype];
+		if (dict)
+			quota_merge_and_update_usage(
+				global_ctx->qctx->quota_dict[qtype], dict);
+	}
+	quota_release_context(&thread_ctx->qctx);
+}
+
 static int e2fsck_pass1_thread_join_one(e2fsck_t global_ctx, e2fsck_t thread_ctx)
 {
 	errcode_t	 retval;
@@ -2557,6 +2577,7 @@ static int e2fsck_pass1_thread_join_one(e2fsck_t global_ctx, e2fsck_t thread_ctx
 	int dx_dir_info_size = global_ctx->dx_dir_info_size;
 	int dx_dir_info_count = global_ctx->dx_dir_info_count;
 	ext2_u32_list dirs_to_hash = global_ctx->dirs_to_hash;
+	quota_ctx_t qctx = global_ctx->qctx;
 
 #ifdef HAVE_SETJMP_H
 	jmp_buf		 old_jmp;
@@ -2628,6 +2649,8 @@ static int e2fsck_pass1_thread_join_one(e2fsck_t global_ctx, e2fsck_t thread_ctx
 		com_err(global_ctx->program_name, 0, _("while merging dirs to hash\n"));
 		return retval;
 	}
+	global_ctx->qctx = qctx;
+	e2fsck_pass1_merge_quota_ctx(global_ctx, thread_ctx);
 
 	/*
 	 * PASS1_COPY_CTX_BITMAP might return directly from this function,
diff --git a/lib/support/mkquota.c b/lib/support/mkquota.c
index 6f7ae6d6..745106b0 100644
--- a/lib/support/mkquota.c
+++ b/lib/support/mkquota.c
@@ -639,6 +639,25 @@ out:
 	return err;
 }
 
+errcode_t quota_merge_and_update_usage(dict_t *dest, dict_t *src)
+{
+	dnode_t *n;
+	struct dquot *src_dq, *dest_dq;
+
+	for (n = dict_first(src); n; n = dict_next(src, n)) {
+		src_dq = dnode_get(n);
+		if (!src_dq)
+			continue;
+		dest_dq = get_dq(dest, src_dq->dq_id);
+		if (dest_dq == NULL)
+			return -ENOMEM;
+		dest_dq->dq_dqb.dqb_curspace += src_dq->dq_dqb.dqb_curspace;
+		dest_dq->dq_dqb.dqb_curinodes += src_dq->dq_dqb.dqb_curinodes;
+	}
+
+	return 0;
+}
+
 /*
  * Compares the measured quota in qctx->quota_dict with that in the quota inode
  * on disk and updates the limits in qctx->quota_dict. 'usage_inconsistent' is
diff --git a/lib/support/quotaio.h b/lib/support/quotaio.h
index 60689700..6077268a 100644
--- a/lib/support/quotaio.h
+++ b/lib/support/quotaio.h
@@ -40,6 +40,7 @@
 #include "ext2fs/ext2_fs.h"
 #include "ext2fs/ext2fs.h"
 #include "dqblk_v2.h"
+#include "support/dict.h"
 
 typedef int64_t qsize_t;	/* Type in which we store size limitations */
 
@@ -233,6 +234,7 @@ int quota_file_exists(ext2_filsys fs, enum quota_type qtype);
 void quota_set_sb_inum(ext2_filsys fs, ext2_ino_t ino, enum quota_type qtype);
 errcode_t quota_compare_and_update(quota_ctx_t qctx, enum quota_type qtype,
 				   int *usage_inconsistent);
+errcode_t quota_merge_and_update_usage(dict_t *dest, dict_t *src);
 int parse_quota_opts(const char *opts, int (*func)(char *));
 
 /* parse_qtype.c */
-- 
2.25.4