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[99.254.144.39]) by smtp.gmail.com with ESMTPSA id s17-20020ae9f711000000b0076f16e98851sm931879qkg.102.2023.10.17.13.26.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Oct 2023 13:26:38 -0700 (PDT) From: Peter Xu To: qemu-devel@nongnu.org Cc: Fabiano Rosas , peterx@redhat.com, =?utf-8?q?Philippe_M?= =?utf-8?q?athieu-Daud=C3=A9?= , Juan Quintela Subject: [PATCH v4 4/5] migration: Change ram_dirty_bitmap_reload() retval to bool Date: Tue, 17 Oct 2023 16:26:32 -0400 Message-ID: <20231017202633.296756-5-peterx@redhat.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231017202633.296756-1-peterx@redhat.com> References: <20231017202633.296756-1-peterx@redhat.com> MIME-Version: 1.0 Received-SPF: pass client-ip=170.10.129.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Now we have a Error** passed into the return path thread stack, which is even clearer than an int retval. Change ram_dirty_bitmap_reload() and the callers to use a bool instead to replace errnos. Suggested-by: Philippe Mathieu-Daudé Signed-off-by: Peter Xu Reviewed-by: Fabiano Rosas Reviewed-by: Juan Quintela --- migration/ram.h | 2 +- migration/migration.c | 18 +++++++++--------- migration/ram.c | 24 ++++++++++++------------ 3 files changed, 22 insertions(+), 22 deletions(-) diff --git a/migration/ram.h b/migration/ram.h index 14ed666d58..af0290f8ab 100644 --- a/migration/ram.h +++ b/migration/ram.h @@ -72,7 +72,7 @@ void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr); void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr); int64_t ramblock_recv_bitmap_send(QEMUFile *file, const char *block_name); -int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb, Error **errp); +bool ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb, Error **errp); bool ramblock_page_is_discarded(RAMBlock *rb, ram_addr_t start); void postcopy_preempt_shutdown_file(MigrationState *s); void *postcopy_preempt_thread(void *opaque); diff --git a/migration/migration.c b/migration/migration.c index 0661dad953..dfb8b48dcb 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -1843,29 +1843,29 @@ migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname, ram_save_queue_pages(rbname, start, len, errp); } -static int migrate_handle_rp_recv_bitmap(MigrationState *s, char *block_name, - Error **errp) +static bool migrate_handle_rp_recv_bitmap(MigrationState *s, char *block_name, + Error **errp) { RAMBlock *block = qemu_ram_block_by_name(block_name); if (!block) { error_setg(errp, "MIG_RP_MSG_RECV_BITMAP has invalid block name '%s'", block_name); - return -EINVAL; + return false; } /* Fetch the received bitmap and refresh the dirty bitmap */ return ram_dirty_bitmap_reload(s, block, errp); } -static int migrate_handle_rp_resume_ack(MigrationState *s, - uint32_t value, Error **errp) +static bool migrate_handle_rp_resume_ack(MigrationState *s, + uint32_t value, Error **errp) { trace_source_return_path_thread_resume_ack(value); if (value != MIGRATION_RESUME_ACK_VALUE) { error_setg(errp, "illegal resume_ack value %"PRIu32, value); - return -1; + return false; } /* Now both sides are active. */ @@ -1875,7 +1875,7 @@ static int migrate_handle_rp_resume_ack(MigrationState *s, /* Notify send thread that time to continue send pages */ migration_rp_kick(s); - return 0; + return true; } /* @@ -2026,14 +2026,14 @@ static void *source_return_path_thread(void *opaque) } /* Format: len (1B) + idstr (<255B). This ends the idstr. */ buf[buf[0] + 1] = '\0'; - if (migrate_handle_rp_recv_bitmap(ms, (char *)(buf + 1), &err)) { + if (!migrate_handle_rp_recv_bitmap(ms, (char *)(buf + 1), &err)) { goto out; } break; case MIG_RP_MSG_RESUME_ACK: tmp32 = ldl_be_p(buf); - if (migrate_handle_rp_resume_ack(ms, tmp32, &err)) { + if (!migrate_handle_rp_resume_ack(ms, tmp32, &err)) { goto out; } break; diff --git a/migration/ram.c b/migration/ram.c index 973e872284..ca77444e18 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -4189,10 +4189,11 @@ static int ram_dirty_bitmap_sync_all(MigrationState *s, RAMState *rs) * Read the received bitmap, revert it as the initial dirty bitmap. * This is only used when the postcopy migration is paused but wants * to resume from a middle point. + * + * Returns true if succeeded, false for errors. */ -int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *block, Error **errp) +bool ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *block, Error **errp) { - int ret = -EINVAL; /* from_dst_file is always valid because we're within rp_thread */ QEMUFile *file = s->rp_state.from_dst_file; g_autofree unsigned long *le_bitmap = NULL; @@ -4206,7 +4207,7 @@ int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *block, Error **errp) if (s->state != MIGRATION_STATUS_POSTCOPY_RECOVER) { error_setg(errp, "Reload bitmap in incorrect state %s", MigrationStatus_str(s->state)); - return -EINVAL; + return false; } /* @@ -4224,24 +4225,23 @@ int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *block, Error **errp) if (size != local_size) { error_setg(errp, "ramblock '%s' bitmap size mismatch (0x%"PRIx64 " != 0x%"PRIx64")", block->idstr, size, local_size); - return -EINVAL; + return false; } size = qemu_get_buffer(file, (uint8_t *)le_bitmap, local_size); end_mark = qemu_get_be64(file); - ret = qemu_file_get_error(file); - if (ret || size != local_size) { - error_setg(errp, "read bitmap failed for ramblock '%s': %d" - " (size 0x%"PRIx64", got: 0x%"PRIx64")", - block->idstr, ret, local_size, size); - return -EIO; + if (qemu_file_get_error(file) || size != local_size) { + error_setg(errp, "read bitmap failed for ramblock '%s': " + "(size 0x%"PRIx64", got: 0x%"PRIx64")", + block->idstr, local_size, size); + return false; } if (end_mark != RAMBLOCK_RECV_BITMAP_ENDING) { error_setg(errp, "ramblock '%s' end mark incorrect: 0x%"PRIx64, block->idstr, end_mark); - return -EINVAL; + return false; } /* @@ -4273,7 +4273,7 @@ int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *block, Error **errp) */ migration_rp_kick(s); - return 0; + return true; } static int ram_resume_prepare(MigrationState *s, void *opaque)