From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43744) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZuP0k-0006lh-4f for qemu-devel@nongnu.org; Thu, 05 Nov 2015 13:11:47 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZuP0i-0003bK-V3 for qemu-devel@nongnu.org; Thu, 05 Nov 2015 13:11:46 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36442) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZuP0i-0003bE-Nj for qemu-devel@nongnu.org; Thu, 05 Nov 2015 13:11:44 -0500 From: "Dr. David Alan Gilbert (git)" Date: Thu, 5 Nov 2015 18:10:33 +0000 Message-Id: <1446747083-18205-7-git-send-email-dgilbert@redhat.com> In-Reply-To: <1446747083-18205-1-git-send-email-dgilbert@redhat.com> References: <1446747083-18205-1-git-send-email-dgilbert@redhat.com> Subject: [Qemu-devel] [PATCH v9 06/56] qemu_ram_block_by_name List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: aarcange@redhat.com, yamahata@private.email.ne.jp, quintela@redhat.com, liang.z.li@intel.com, luis@cs.umu.se, bharata@linux.vnet.ibm.com, amit.shah@redhat.com, pbonzini@redhat.com, david@gibson.dropbear.id.au From: "Dr. David Alan Gilbert" Add a function to find a RAMBlock by name; use it in two of the places that already open code that loop; we've got another use later in postcopy. Signed-off-by: Dr. David Alan Gilbert --- exec.c | 20 ++++++++++++++++++++ include/exec/cpu-common.h | 1 + migration/ram.c | 35 +++++++++++++++-------------------- 3 files changed, 36 insertions(+), 20 deletions(-) diff --git a/exec.c b/exec.c index 2b1e13a..f8aad39 100644 --- a/exec.c +++ b/exec.c @@ -1944,6 +1944,26 @@ found: return block; } +/* + * Finds the named RAMBlock + * + * name: The name of RAMBlock to find + * + * Returns: RAMBlock (or NULL if not found) + */ +RAMBlock *qemu_ram_block_by_name(const char *name) +{ + RAMBlock *block; + + QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + if (!strcmp(name, block->idstr)) { + return block; + } + } + + return NULL; +} + /* Some of the softmmu routines need to translate from a host pointer (typically a TLB entry) back to a ram offset. */ MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 94d1f8a..85aa403 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -64,6 +64,7 @@ typedef uint32_t CPUReadMemoryFunc(void *opaque, hwaddr addr); void qemu_ram_remap(ram_addr_t addr, ram_addr_t length); /* This should not be used by devices. */ MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr); +RAMBlock *qemu_ram_block_by_name(const char *name); RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, ram_addr_t *ram_addr, ram_addr_t *offset); void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev); diff --git a/migration/ram.c b/migration/ram.c index df3df9e..d654a73 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -1420,14 +1420,12 @@ static inline void *host_from_stream_offset(QEMUFile *f, qemu_get_buffer(f, (uint8_t *)id, len); id[len] = 0; - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - if (!strncmp(id, block->idstr, sizeof(id)) && - block->max_length > offset) { - return block->host + offset; - } + block = qemu_ram_block_by_name(id); + if (block && block->max_length > offset) { + return block->host + offset; } - error_report("Can't find block %s!", id); + error_report("Can't find block %s", id); return NULL; } @@ -1576,23 +1574,20 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id) id[len] = 0; length = qemu_get_be64(f); - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - if (!strncmp(id, block->idstr, sizeof(id))) { - if (length != block->used_length) { - Error *local_err = NULL; + block = qemu_ram_block_by_name(id); + if (block) { + if (length != block->used_length) { + Error *local_err = NULL; - ret = qemu_ram_resize(block->offset, length, &local_err); - if (local_err) { - error_report_err(local_err); - } + ret = qemu_ram_resize(block->offset, length, + &local_err); + if (local_err) { + error_report_err(local_err); } - ram_control_load_hook(f, RAM_CONTROL_BLOCK_REG, - block->idstr); - break; } - } - - if (!block) { + ram_control_load_hook(f, RAM_CONTROL_BLOCK_REG, + block->idstr); + } else { error_report("Unknown ramblock \"%s\", cannot " "accept migration", id); ret = -EINVAL; -- 2.5.0