From patchwork Fri Aug 11 11:05:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kara X-Patchwork-Id: 13350663 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D9DFC001DB for ; Fri, 11 Aug 2023 11:06:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235757AbjHKLGJ (ORCPT ); Fri, 11 Aug 2023 07:06:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50562 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234696AbjHKLFh (ORCPT ); Fri, 11 Aug 2023 07:05:37 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED2251994; Fri, 11 Aug 2023 04:05:11 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 894371F8AB; Fri, 11 Aug 2023 11:05:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1691751906; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=GSj8Idmwlk2KTpMfIy/2c/+NuKyGl9tAHG1uQWexaS0=; b=oZ7xpOQwaLqjESOM8cLKrlakfDk0e+PTlBOe2m1SGCSVMudowHg5RDiIFH88vw3/3izwcM cDPq1T2WxAgVqNVcHKE1zcKEquyVR6jSN6r2qFd+ddrSDU7D3A3Q7NtVJ+WfmZQh+4KJx0 GcSYdt1e46vpT5wOOov8WEO9tBBc7Cs= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1691751906; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=GSj8Idmwlk2KTpMfIy/2c/+NuKyGl9tAHG1uQWexaS0=; b=LdMEyAIe9QsaTak9s4wGxF4dtdKZdbik5ezIVis8QzgxiZgp9LLKex08HcXrQdezlKl5On 5w9WVRPNK6vqcQAg== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 772C713A95; Fri, 11 Aug 2023 11:05:06 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id Fk0UHeIV1mR+RQAAMHmgww (envelope-from ); Fri, 11 Aug 2023 11:05:06 +0000 Received: by quack3.suse.cz (Postfix, from userid 1000) id 69F7BA0799; Fri, 11 Aug 2023 13:05:05 +0200 (CEST) From: Jan Kara To: Cc: , Christoph Hellwig , Jan Kara Subject: [PATCH 29/29] block: Remove blkdev_get_by_*() functions Date: Fri, 11 Aug 2023 13:05:00 +0200 Message-Id: <20230811110504.27514-29-jack@suse.cz> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230810171429.31759-1-jack@suse.cz> References: <20230810171429.31759-1-jack@suse.cz> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=6794; i=jack@suse.cz; h=from:subject; bh=UsnntMIeaScmW7hx81NWZq2VByEWemzUKPAltQFMX2c=; b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBk1hXceErAEFLAseDwPOeYTJ+kJipEdly6wTitnH0f gSlHNFOJATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCZNYV3AAKCRCcnaoHP2RA2ZxgB/ wI6vx4QVBHhISl3H1e6bJgqRFj55wW7/06pqBw6+U+y78jAMK5Qh1PagHtWGYN/q2qLlb0VyIbR13J sGwttxdnKAcbnBvyCta/RNKMEVN6olQpwQIXgWTMrI0S0w/1Y/FlOwzhVwwltppGX5Sor/IE4Ve75W DlTFUlHx9j65lkLB82x9wqYPR/q8mupWlFHtJTLchdUFmg9rz4sZAAdCVW933khl+oX4yBUuJ43/tx LuzI/2qzv/hA0YqAhYyIiBOrkDHoxJWzWx00s0sgfQukOu6qdvvFqYIhfDqNI12zv4dlNz77UNn/6K 6paXUyMKSI1/M5/jSiKPNvwgLBJDco X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org blkdev_get_by_*() and blkdev_put() functions are now unused. Remove them. Signed-off-by: Jan Kara --- block/bdev.c | 94 ++++++++++++++---------------------------- include/linux/blkdev.h | 5 --- 2 files changed, 30 insertions(+), 69 deletions(-) diff --git a/block/bdev.c b/block/bdev.c index 32c0ef5abad4..0e631c9a75aa 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -746,7 +746,7 @@ void blkdev_put_no_open(struct block_device *bdev) } /** - * blkdev_get_by_dev - open a block device by device number + * bdev_open_by_dev - open a block device by device number * @dev: device number of block device to open * @mode: open mode (BLK_OPEN_*) * @holder: exclusive holder identifier @@ -758,32 +758,40 @@ void blkdev_put_no_open(struct block_device *bdev) * * Use this interface ONLY if you really do not have anything better - i.e. when * you are behind a truly sucky interface and all you are given is a device - * number. Everything else should use blkdev_get_by_path(). + * number. Everything else should use bdev_open_by_path(). * * CONTEXT: * Might sleep. * * RETURNS: - * Reference to the block_device on success, ERR_PTR(-errno) on failure. + * Handle with a reference to the block_device on success, ERR_PTR(-errno) on + * failure. */ -struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder, - const struct blk_holder_ops *hops) +struct bdev_handle *bdev_open_by_dev(dev_t dev, blk_mode_t mode, void *holder, + const struct blk_holder_ops *hops) { - bool unblock_events = true; + struct bdev_handle *handle = kmalloc(sizeof(struct bdev_handle), + GFP_KERNEL); struct block_device *bdev; + bool unblock_events = true; struct gendisk *disk; int ret; + if (!handle) + return ERR_PTR(-ENOMEM); + ret = devcgroup_check_permission(DEVCG_DEV_BLOCK, MAJOR(dev), MINOR(dev), ((mode & BLK_OPEN_READ) ? DEVCG_ACC_READ : 0) | ((mode & BLK_OPEN_WRITE) ? DEVCG_ACC_WRITE : 0)); if (ret) - return ERR_PTR(ret); + goto free_handle; bdev = blkdev_get_no_open(dev); - if (!bdev) - return ERR_PTR(-ENXIO); + if (!bdev) { + ret = -ENXIO; + goto free_handle; + } disk = bdev->bd_disk; if (holder) { @@ -832,7 +840,10 @@ struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder, if (unblock_events) disk_unblock_events(disk); - return bdev; + handle->bdev = bdev; + handle->holder = holder; + handle->mode = mode; + return handle; put_module: module_put(disk->fops->owner); abort_claiming: @@ -842,34 +853,14 @@ struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder, disk_unblock_events(disk); put_blkdev: blkdev_put_no_open(bdev); +free_handle: + kfree(handle); return ERR_PTR(ret); } -EXPORT_SYMBOL(blkdev_get_by_dev); - -struct bdev_handle *bdev_open_by_dev(dev_t dev, blk_mode_t mode, void *holder, - const struct blk_holder_ops *hops) -{ - struct bdev_handle *handle = kmalloc(sizeof(*handle), GFP_KERNEL); - struct block_device *bdev; - - if (!handle) - return ERR_PTR(-ENOMEM); - bdev = blkdev_get_by_dev(dev, mode, holder, hops); - if (IS_ERR(bdev)) { - kfree(handle); - return ERR_CAST(bdev); - } - handle->bdev = bdev; - handle->holder = holder; - if (holder) - mode |= BLK_OPEN_EXCL; - handle->mode = mode; - return handle; -} EXPORT_SYMBOL(bdev_open_by_dev); /** - * blkdev_get_by_path - open a block device by name + * bdev_open_by_path - open a block device by name * @path: path to the block device to open * @mode: open mode (BLK_OPEN_*) * @holder: exclusive holder identifier @@ -883,29 +874,9 @@ EXPORT_SYMBOL(bdev_open_by_dev); * Might sleep. * * RETURNS: - * Reference to the block_device on success, ERR_PTR(-errno) on failure. + * Handle with a reference to the block_device on success, ERR_PTR(-errno) on + * failure. */ -struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode, - void *holder, const struct blk_holder_ops *hops) -{ - struct block_device *bdev; - dev_t dev; - int error; - - error = lookup_bdev(path, &dev); - if (error) - return ERR_PTR(error); - - bdev = blkdev_get_by_dev(dev, mode, holder, hops); - if (!IS_ERR(bdev) && (mode & BLK_OPEN_WRITE) && bdev_read_only(bdev)) { - blkdev_put(bdev, holder); - return ERR_PTR(-EACCES); - } - - return bdev; -} -EXPORT_SYMBOL(blkdev_get_by_path); - struct bdev_handle *bdev_open_by_path(const char *path, blk_mode_t mode, void *holder, const struct blk_holder_ops *hops) { @@ -928,8 +899,9 @@ struct bdev_handle *bdev_open_by_path(const char *path, blk_mode_t mode, } EXPORT_SYMBOL(bdev_open_by_path); -void blkdev_put(struct block_device *bdev, void *holder) +void bdev_release(struct bdev_handle *handle) { + struct block_device *bdev = handle->bdev; struct gendisk *disk = bdev->bd_disk; /* @@ -943,8 +915,8 @@ void blkdev_put(struct block_device *bdev, void *holder) sync_blockdev(bdev); mutex_lock(&disk->open_mutex); - if (holder) - bd_end_claim(bdev, holder); + if (handle->holder) + bd_end_claim(bdev, handle->holder); /* * Trigger event checking and tell drivers to flush MEDIA_CHANGE @@ -961,12 +933,6 @@ void blkdev_put(struct block_device *bdev, void *holder) module_put(disk->fops->owner); blkdev_put_no_open(bdev); -} -EXPORT_SYMBOL(blkdev_put); - -void bdev_release(struct bdev_handle *handle) -{ - blkdev_put(handle->bdev, handle->holder); kfree(handle); } EXPORT_SYMBOL(bdev_release); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 0e89ad5c645c..28f78bdecae7 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1479,10 +1479,6 @@ struct bdev_handle { blk_mode_t mode; }; -struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder, - const struct blk_holder_ops *hops); -struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode, - void *holder, const struct blk_holder_ops *hops); struct bdev_handle *bdev_open_by_dev(dev_t dev, blk_mode_t mode, void *holder, const struct blk_holder_ops *hops); struct bdev_handle *bdev_open_by_path(const char *path, blk_mode_t mode, @@ -1490,7 +1486,6 @@ struct bdev_handle *bdev_open_by_path(const char *path, blk_mode_t mode, int bd_prepare_to_claim(struct block_device *bdev, void *holder, const struct blk_holder_ops *hops); void bd_abort_claiming(struct block_device *bdev, void *holder); -void blkdev_put(struct block_device *bdev, void *holder); void bdev_release(struct bdev_handle *handle); /* just for blk-cgroup, don't use elsewhere */