e2fsck: add start/end group for thread

When multi-threads are used for check, each thread needs to jump
to different group in pass1 check. This patch adds the group
jumping support. But still, only one thread is used to check.

E2fsprogs-commit: f64ff7f53c6fb22c7e4bebe86749b1be31439424

Change-Id: I904bedcbd02bca591665943cff5f2d7a6fa50fbe
Signed-off-by: Li Xi <lixi@ddn.com>
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/e2fsck/e2fsck.h b/e2fsck/e2fsck.h
index ff19d14..7613fc7 100644 (file)
--- a/e2fsck/e2fsck.h
+++ b/e2fsck/e2fsck.h
@@ -261,6 +261,22 @@ struct e2fsck_fc_replay_state {
        __u16 fc_super_state;
 };
 
+#ifdef HAVE_PTHREAD
+/*
+ * Fields that used for multi-thread
+ */
+struct e2fsck_thread {
+       /* Thread index */
+       int             et_thread_index;
+       /* The start group number for this thread */
+       dgrp_t          et_group_start;
+       /* The end (not included) group number for this thread*/
+       dgrp_t          et_group_end;
+       /* The next group number to check */
+       dgrp_t          et_group_next;
+};
+#endif
+
 struct e2fsck_struct {
        /* Global context to get the cancel flag */
        e2fsck_t                global_ctx;
@@ -345,8 +361,11 @@ struct e2fsck_struct {
         */
        ext2_ino_t              stashed_ino;
        struct ext2_inode       *stashed_inode;
-       /* Thread index, if global_ctx is null, this field is unused */
-       int                     thread_index;
+
+       /* if @global_ctx is null, this field is unused */
+#ifdef HAVE_PTHREAD
+       struct e2fsck_thread     thread_info;
+#endif
 
        /*
         * Location of the lost and found directory

diff --git a/e2fsck/logfile.c b/e2fsck/logfile.c
index 74781f8..cc811d5 100644 (file)
--- a/e2fsck/logfile.c
+++ b/e2fsck/logfile.c
@@ -315,7 +315,8 @@ static FILE *set_up_log_file(e2fsck_t ctx, const char *key, const char *fn)
        expand_logfn(ctx, log_fn, &s);
 #ifdef HAVE_PTHREAD
        if (ctx->global_ctx) {
-               sprintf(string_index, "%d", ctx->thread_index);
+               sprintf(string_index, "%d",
+                       ctx->thread_info.et_thread_index);
                append_string(&s, ".", 1);
                append_string(&s, string_index, 0);
        }

diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index 1a66b98..a610f18 100644 (file)
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -1389,6 +1389,23 @@ void e2fsck_pass1_run(e2fsck_t ctx)
        /* Set up ctx->lost_and_found if possible */
        (void) e2fsck_get_lost_and_found(ctx, 0);
 
+#ifdef HAVE_PTHREAD
+       if (ctx->global_ctx) {
+               if (ctx->options & E2F_OPT_DEBUG &&
+                   ctx->options & E2F_OPT_MULTITHREAD)
+                       fprintf(stderr, "thread %d jumping to group %d\n",
+                                       ctx->thread_info.et_thread_index,
+                                       ctx->thread_info.et_group_start);
+               pctx.errcode = ext2fs_inode_scan_goto_blockgroup(scan,
+                                       ctx->thread_info.et_group_start);
+               if (pctx.errcode) {
+                       fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
+                       ctx->flags |= E2F_FLAG_ABORT;
+                       goto endit;
+               }
+       }
+#endif
+
        while (1) {
                if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
                        if (e2fsck_mmp_update(fs))
@@ -1432,6 +1449,8 @@ void e2fsck_pass1_run(e2fsck_t ctx)
                        ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
                        continue;
                }
+               if (pctx.errcode == EXT2_ET_SCAN_FINISHED)
+                       break;
                if (pctx.errcode &&
                    pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
                    pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
@@ -2249,12 +2268,14 @@ static int e2fsck_pass1_merge_fs(ext2_filsys dest, ext2_filsys src)
        return retval;
 }
 
-static errcode_t e2fsck_pass1_thread_prepare(e2fsck_t global_ctx, e2fsck_t *thread_ctx)
+static errcode_t e2fsck_pass1_thread_prepare(e2fsck_t global_ctx, e2fsck_t *thread_ctx,
+                                            int thread_index)
 {
-       errcode_t       retval;
-       e2fsck_t        thread_context;
-       ext2_filsys     thread_fs;
-       ext2_filsys     global_fs = global_ctx->fs;
+       errcode_t               retval;
+       e2fsck_t                thread_context;
+       ext2_filsys             thread_fs;
+       ext2_filsys             global_fs = global_ctx->fs;
+       struct e2fsck_thread    *tinfo;
 
        assert(global_ctx->inode_used_map == NULL);
        assert(global_ctx->inode_dir_map == NULL);
@@ -2291,9 +2312,15 @@ static errcode_t e2fsck_pass1_thread_prepare(e2fsck_t global_ctx, e2fsck_t *thre
        }
        thread_fs->priv_data = thread_context;
 
-       thread_context->thread_index = 0;
+       thread_context->thread_info.et_thread_index = thread_index;
        set_up_logging(thread_context);
 
+       assert(thread_index == 0);
+       tinfo = &thread_context->thread_info;
+       tinfo->et_group_start = 0;
+       tinfo->et_group_next = 0;
+       tinfo->et_group_end = thread_fs->group_desc_count;
+
        thread_context->fs = thread_fs;
        *thread_ctx = thread_context;
        return 0;
@@ -2516,7 +2543,7 @@ static int e2fsck_pass1_threads_start(struct e2fsck_thread_info **pinfo,
        for (i = 0; i < num_threads; i++) {
                tmp_pinfo = &infos[i];
                tmp_pinfo->eti_thread_index = i;
-               retval = e2fsck_pass1_thread_prepare(global_ctx, &thread_ctx);
+               retval = e2fsck_pass1_thread_prepare(global_ctx, &thread_ctx, i);
                if (retval) {
                        com_err(global_ctx->program_name, retval,
                                _("while preparing pass1 thread\n"));
@@ -2601,6 +2628,7 @@ static errcode_t scan_callback(ext2_filsys fs,
 {
        struct scan_callback_struct *scan_struct;
        e2fsck_t ctx;
+       struct e2fsck_thread *tinfo;
 
        scan_struct = (struct scan_callback_struct *) priv_data;
        ctx = scan_struct->ctx;
@@ -2612,6 +2640,15 @@ static errcode_t scan_callback(ext2_filsys fs,
                                    ctx->fs->group_desc_count))
                        return EXT2_ET_CANCEL_REQUESTED;
 
+#ifdef HAVE_PTHREAD
+       if (ctx->global_ctx) {
+               tinfo = &ctx->thread_info;
+               tinfo->et_group_next++;
+               if (tinfo->et_group_next >= tinfo->et_group_end)
+                       return EXT2_ET_SCAN_FINISHED;
+       }
+#endif
+
        return 0;
 }
 

diff --git a/e2fsck/problem.c b/e2fsck/problem.c
index e2572f5..3c1b216 100644 (file)
--- a/e2fsck/problem.c
+++ b/e2fsck/problem.c
@@ -1279,6 +1279,10 @@ static struct e2fsck_problem problem_table[] = {
          N_("@h %i uses SipHash, but should not.  "),
          PROMPT_CLEAR_HTREE, PR_PREEN_OK, 0, 0, 0 },
 
+       /* Failed to goto block group */
+       { PR_1_SCAN_GOTO,
+         N_("failed to goto block group"),
+          PROMPT_NONE, PR_FATAL, 0, 0, 0 },
 
        /* Pass 1b errors */
 

diff --git a/e2fsck/problem.h b/e2fsck/problem.h
index e86bc88..b7a6929 100644 (file)
--- a/e2fsck/problem.h
+++ b/e2fsck/problem.h
@@ -716,6 +716,8 @@ struct problem_context {
 /* Htree directory uses SipHash but should not */
 #define PR_1_HTREE_CANNOT_SIPHASH              0x01008E
 
+/* Failed to goto block group */
+#define PR_1_SCAN_GOTO                         0x0100A0
 
 /*
  * Pass 1b errors

diff --git a/lib/ext2fs/ext2_err.et.in b/lib/ext2fs/ext2_err.et.in
index de14019..b8f45ae 100644 (file)
--- a/lib/ext2fs/ext2_err.et.in
+++ b/lib/ext2fs/ext2_err.et.in
@@ -557,4 +557,7 @@ ec  EXT2_ET_EXTENT_CYCLE,
 ec     EXT2_ET_EXTERNAL_JOURNAL_NOSUPP,
        "Operation not supported on an external journal"
 
+ec     EXT2_ET_SCAN_FINISHED,
+       "Scanning finished"
+
        end