From patchwork Wed May 31 08:15:10 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tahsin Erdogan X-Patchwork-Id: 9756217 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4637A60360 for ; Wed, 31 May 2017 08:25:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 30DA51FF8F for ; Wed, 31 May 2017 08:25:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 232AA283BD; Wed, 31 May 2017 08:25:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,RCVD_IN_DNSWL_HI,RCVD_IN_SORBS_SPAM autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 73FC21FF8F for ; Wed, 31 May 2017 08:25:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751406AbdEaIY6 (ORCPT ); Wed, 31 May 2017 04:24:58 -0400 Received: from mail-pg0-f52.google.com ([74.125.83.52]:33587 "EHLO mail-pg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751405AbdEaIRT (ORCPT ); Wed, 31 May 2017 04:17:19 -0400 Received: by mail-pg0-f52.google.com with SMTP id u187so4575669pgb.0 for ; Wed, 31 May 2017 01:17:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=+PEY/hJVdnvTrL8BALehCA8cRfBrvaLYT++Zk9XQVDw=; b=esG9ETzh99/okFdualYxqKMVIXn9fXI34gi4okJn91XmxBoyjRxNgwUUu/AGFIKkH6 R4tYmRTErllZFY/x5t8h/qw5BIi3bkgmC69kLvA1P8eTpKcQzyd9Fhaw+4Glj1XY02/2 U7CzgibOgN4r4dWwA8Q3JonZl040EOe9dklid/ikDYnKjpJ/LiP65ltgnh0KHGm4uRKN 4tTlrZYyC7pm2ozo7e2Yu/FfWpmvZ3Z0PptVA4rCtp2aDpXIyCmq31EbxAtR4I0Snnaf mKeJppadwKoi51xP7PkpOUOS2ofGbgs2ER13X0I67SlzDmc+eWiCcSk7KIzdx3bxq5ZE /1rw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=+PEY/hJVdnvTrL8BALehCA8cRfBrvaLYT++Zk9XQVDw=; b=kHy2qxQ8sDm30pt4VeN9rWzM4RpKkcxTvVUMEgPJmXC5kAc4Hvz8rp8mTJITZTThwi duRRRLqOlqLh9XsvmF9Qo56rHwfzVXALUHn9DVBNEH8gPe+VKYwnPpMUlgqClD4e7ybJ Mp3uNxwNV47LSL0yx/5/3b60ss/jFABudBkv9vwPQljnC0jlZPGmYyuhFmk3qxIDPsvc cAQcSjIiRwItkHh16rQQrzfSgFz7s7RPBxA51/g2GewVz1Qi+VZ1aRWbFYNjzGJmMDdp CX3dMu76DFMWtH3A590QwMW5koOtRbC97ZsLrdrsQEETbE5O17rsddaCsi9w4wHDTn0H i4Ng== X-Gm-Message-State: AODbwcDwvZmmC698XKw452NUOxo+Hqm8ZQU682NngsVpCo/UtGxb+hdy r9qo+/MosX4nCz2+ X-Received: by 10.101.90.199 with SMTP id d7mr3690608pgt.227.1496218638404; Wed, 31 May 2017 01:17:18 -0700 (PDT) Received: from tahsin1.svl.corp.google.com ([100.123.230.167]) by smtp.gmail.com with ESMTPSA id g75sm25469724pfd.83.2017.05.31.01.17.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 31 May 2017 01:17:17 -0700 (PDT) From: Tahsin Erdogan To: Jan Kara , Theodore Ts'o , Andreas Dilger , Dave Kleikamp , Alexander Viro , Mark Fasheh , Joel Becker , Jens Axboe , Deepa Dinamani , Mike Christie , Fabian Frederick , linux-ext4@vger.kernel.org Cc: linux-kernel@vger.kernel.org, jfs-discussion@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, ocfs2-devel@oss.oracle.com, reiserfs-devel@vger.kernel.org, Tahsin Erdogan Subject: [PATCH 21/28] ext4: modify ext4_xattr_ino_array to hold struct inode * Date: Wed, 31 May 2017 01:15:10 -0700 Message-Id: <20170531081517.11438-21-tahsin@google.com> X-Mailer: git-send-email 2.13.0.219.gdb65acc882-goog In-Reply-To: <20170531081517.11438-1-tahsin@google.com> References: <20170531081517.11438-1-tahsin@google.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Tracking struct inode * rather than the inode number eliminates the repeated ext4_xattr_inode_iget() call later. The second call cannot fail in practice but still requires explanation when it wants to ignore the return value. Avoid the trouble and make things simple. Signed-off-by: Tahsin Erdogan --- fs/ext4/ext4.h | 6 ++-- fs/ext4/inode.c | 8 ++--- fs/ext4/xattr.c | 93 ++++++++++++++++++++++++++++----------------------------- fs/ext4/xattr.h | 5 ++-- 4 files changed, 53 insertions(+), 59 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 2cdd6070e348..603edb5ff304 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2232,9 +2232,9 @@ struct mmpd_data { # define ATTRIB_NORET __attribute__((noreturn)) # define NORET_AND noreturn, -struct ext4_xattr_ino_array { - unsigned int xia_count; /* # of used item in the array */ - unsigned int xia_inodes[0]; +struct ext4_xattr_inode_array { + unsigned int count; /* # of used items in the array */ + struct inode *inodes[0]; }; /* bitmap.c */ extern unsigned int ext4_count_free(char *bitmap, unsigned numchars); diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index d095bf7ad390..8ee20b586567 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -188,7 +188,7 @@ void ext4_evict_inode(struct inode *inode) handle_t *handle; int err; int extra_credits = 3; - struct ext4_xattr_ino_array *lea_ino_array = NULL; + struct ext4_xattr_inode_array *ea_inode_array = NULL; trace_ext4_evict_inode(inode); @@ -257,7 +257,7 @@ void ext4_evict_inode(struct inode *inode) /* * Delete xattr inode before deleting the main inode. */ - err = ext4_xattr_delete_inode(handle, inode, &lea_ino_array); + err = ext4_xattr_delete_inode(handle, inode, &ea_inode_array); if (err) { ext4_warning(inode->i_sb, "couldn't delete inode's xattr (err %d)", err); @@ -345,9 +345,7 @@ void ext4_evict_inode(struct inode *inode) ext4_journal_stop(handle); sb_end_intwrite(inode->i_sb); - - if (lea_ino_array != NULL) - ext4_xattr_inode_array_free(inode, lea_ino_array); + ext4_xattr_inode_array_free(ea_inode_array); return; no_delete: ext4_clear_inode(inode); /* We must guarantee clearing of inode... */ diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 5bce73b43b2a..886d06e409b6 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -1942,44 +1942,44 @@ int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize, #define EIA_INCR 16 /* must be 2^n */ #define EIA_MASK (EIA_INCR - 1) -/* Add the large xattr @ino into @lea_ino_array for later deletion. - * If @lea_ino_array is new or full it will be grown and the old +/* Add the large xattr @inode into @ea_inode_array for later deletion. + * If @ea_inode_array is new or full it will be grown and the old * contents copied over. */ static int -ext4_expand_ino_array(struct ext4_xattr_ino_array **lea_ino_array, __u32 ino) +ext4_expand_inode_array(struct ext4_xattr_inode_array **ea_inode_array, + struct inode *inode) { - if (*lea_ino_array == NULL) { + if (*ea_inode_array == NULL) { /* * Start with 15 inodes, so it fits into a power-of-two size. - * If *lea_ino_array is NULL, this is essentially offsetof() + * If *ea_inode_array is NULL, this is essentially offsetof() */ - (*lea_ino_array) = - kmalloc(offsetof(struct ext4_xattr_ino_array, - xia_inodes[EIA_MASK]), + (*ea_inode_array) = + kmalloc(offsetof(struct ext4_xattr_inode_array, + inodes[EIA_MASK]), GFP_NOFS); - if (*lea_ino_array == NULL) + if (*ea_inode_array == NULL) return -ENOMEM; - (*lea_ino_array)->xia_count = 0; - } else if (((*lea_ino_array)->xia_count & EIA_MASK) == EIA_MASK) { + (*ea_inode_array)->count = 0; + } else if (((*ea_inode_array)->count & EIA_MASK) == EIA_MASK) { /* expand the array once all 15 + n * 16 slots are full */ - struct ext4_xattr_ino_array *new_array = NULL; - int count = (*lea_ino_array)->xia_count; + struct ext4_xattr_inode_array *new_array = NULL; + int count = (*ea_inode_array)->count; /* if new_array is NULL, this is essentially offsetof() */ new_array = kmalloc( - offsetof(struct ext4_xattr_ino_array, - xia_inodes[count + EIA_INCR]), + offsetof(struct ext4_xattr_inode_array, + inodes[count + EIA_INCR]), GFP_NOFS); if (new_array == NULL) return -ENOMEM; - memcpy(new_array, *lea_ino_array, - offsetof(struct ext4_xattr_ino_array, - xia_inodes[count])); - kfree(*lea_ino_array); - *lea_ino_array = new_array; + memcpy(new_array, *ea_inode_array, + offsetof(struct ext4_xattr_inode_array, inodes[count])); + kfree(*ea_inode_array); + *ea_inode_array = new_array; } - (*lea_ino_array)->xia_inodes[(*lea_ino_array)->xia_count++] = ino; + (*ea_inode_array)->inodes[(*ea_inode_array)->count++] = inode; return 0; } @@ -1987,16 +1987,16 @@ ext4_expand_ino_array(struct ext4_xattr_ino_array **lea_ino_array, __u32 ino) * Add xattr inode to orphan list */ static int -ext4_xattr_inode_orphan_add(handle_t *handle, struct inode *inode, - int credits, struct ext4_xattr_ino_array *lea_ino_array) +ext4_xattr_inode_orphan_add(handle_t *handle, struct inode *inode, int credits, + struct ext4_xattr_inode_array *ea_inode_array) { - struct inode *ea_inode; int idx = 0, error = 0; + struct inode *ea_inode; - if (lea_ino_array == NULL) + if (ea_inode_array == NULL) return 0; - for (; idx < lea_ino_array->xia_count; ++idx) { + for (; idx < ea_inode_array->count; ++idx) { if (!ext4_handle_has_enough_credits(handle, credits)) { error = ext4_journal_extend(handle, credits); if (error > 0) @@ -2009,10 +2009,7 @@ ext4_xattr_inode_orphan_add(handle_t *handle, struct inode *inode, return error; } } - error = ext4_xattr_inode_iget(inode, - lea_ino_array->xia_inodes[idx], &ea_inode); - if (error) - continue; + ea_inode = ea_inode_array->inodes[idx]; inode_lock(ea_inode); ext4_orphan_add(handle, ea_inode); inode_unlock(ea_inode); @@ -2034,13 +2031,14 @@ ext4_xattr_inode_orphan_add(handle_t *handle, struct inode *inode, */ int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, - struct ext4_xattr_ino_array **lea_ino_array) + struct ext4_xattr_inode_array **ea_inode_array) { struct buffer_head *bh = NULL; struct ext4_xattr_ibody_header *header; struct ext4_inode *raw_inode; struct ext4_iloc iloc; struct ext4_xattr_entry *entry; + struct inode *ea_inode; unsigned int ea_ino; int credits = 3, error = 0; @@ -2057,8 +2055,12 @@ ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, if (!entry->e_value_inum) continue; ea_ino = le32_to_cpu(entry->e_value_inum); - error = ext4_expand_ino_array(lea_ino_array, ea_ino); + error = ext4_xattr_inode_iget(inode, ea_ino, &ea_inode); + if (error) + continue; + error = ext4_expand_inode_array(ea_inode_array, ea_inode); if (error) { + iput(ea_inode); brelse(iloc.bh); goto cleanup; } @@ -2070,7 +2072,7 @@ ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, if (!EXT4_I(inode)->i_file_acl) { /* add xattr inode to orphan list */ error = ext4_xattr_inode_orphan_add(handle, inode, credits, - *lea_ino_array); + *ea_inode_array); goto cleanup; } bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl); @@ -2093,7 +2095,10 @@ ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, if (!entry->e_value_inum) continue; ea_ino = le32_to_cpu(entry->e_value_inum); - error = ext4_expand_ino_array(lea_ino_array, ea_ino); + error = ext4_xattr_inode_iget(inode, ea_ino, &ea_inode); + if (error) + continue; + error = ext4_expand_inode_array(ea_inode_array, ea_inode); if (error) goto cleanup; entry->e_value_inum = 0; @@ -2101,7 +2106,7 @@ ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, /* add xattr inode to orphan list */ error = ext4_xattr_inode_orphan_add(handle, inode, credits, - *lea_ino_array); + *ea_inode_array); if (error) goto cleanup; @@ -2128,28 +2133,20 @@ ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, return error; } -void -ext4_xattr_inode_array_free(struct inode *inode, - struct ext4_xattr_ino_array *lea_ino_array) +void ext4_xattr_inode_array_free(struct ext4_xattr_inode_array *ea_inode_array) { struct inode *ea_inode; int idx = 0; - int err; - if (lea_ino_array == NULL) + if (ea_inode_array == NULL) return; - for (; idx < lea_ino_array->xia_count; ++idx) { - err = ext4_xattr_inode_iget(inode, - lea_ino_array->xia_inodes[idx], &ea_inode); - if (err) - continue; - /* for inode's i_count get from ext4_xattr_delete_inode */ - iput(ea_inode); + for (; idx < ea_inode_array->count; ++idx) { + ea_inode = ea_inode_array->inodes[idx]; clear_nlink(ea_inode); iput(ea_inode); } - kfree(lea_ino_array); + kfree(ea_inode_array); } /* diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index e82c5fe36a26..323eba54f72f 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -164,9 +164,8 @@ extern int ext4_xattr_set_credits(struct inode *inode, size_t value_len); extern int ext4_xattr_inode_unlink(struct inode *inode, unsigned long ea_ino); extern int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, - struct ext4_xattr_ino_array **array); -extern void ext4_xattr_inode_array_free(struct inode *inode, - struct ext4_xattr_ino_array *array); + struct ext4_xattr_inode_array **array); +extern void ext4_xattr_inode_array_free(struct ext4_xattr_inode_array *array); extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize, struct ext4_inode *raw_inode, handle_t *handle);