From: Dmitry Monakhov Subject: [PATCH 2/2] ext4: Convert to generic reserved quota's space management. [V3] Date: Thu, 10 Dec 2009 15:25:52 +0300 Message-ID: <1260447952-6201-2-git-send-email-dmonakhov@openvz.org> References: <1260447952-6201-1-git-send-email-dmonakhov@openvz.org> Content-Transfer-Encoding: 7BIT Cc: aneesh.kumar@linux.vnet.ibm.com, jack@suse.cz, cmm@us.ibm.com, Dmitry Monakhov To: linux-ext4@vger.kernel.org Return-path: Received: from mail.2ka.mipt.ru ([194.85.80.4]:61277 "EHLO mail.2ka.mipt.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932929AbZLJMZl (ORCPT ); Thu, 10 Dec 2009 07:25:41 -0500 Received: from localhost.localdomain ([unknown] [10.55.93.124]) by mail.2ka.mipt.ru (Sun Java(tm) System Messaging Server 7u2-7.02 64bit (built Apr 16 2009)) with ESMTPA id <0KUF00AG7S2U2I00@mail.2ka.mipt.ru> for linux-ext4@vger.kernel.org; Thu, 10 Dec 2009 15:30:34 +0300 (MSK) In-reply-to: <1260447952-6201-1-git-send-email-dmonakhov@openvz.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: This patch fix write vs chown race condition. Changes from V2: -add missed i_reserved_quota iniatilization.diff Signed-off-by: Dmitry Monakhov --- fs/ext4/ext4.h | 6 +++++- fs/ext4/inode.c | 16 +++++++--------- fs/ext4/super.c | 3 +++ 3 files changed, 15 insertions(+), 10 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 26d3cf8..992cecd 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -705,6 +705,10 @@ struct ext4_inode_info { struct list_head i_aio_dio_complete_list; /* current io_end structure for async DIO write*/ ext4_io_end_t *cur_aio_dio; +#ifdef CONFIG_QUOTA + /* quota space reservation, managed internally by quota code */ + qsize_t i_reserved_quota; +#endif }; /* @@ -1427,7 +1431,7 @@ extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); extern int ext4_block_truncate_page(handle_t *handle, struct address_space *mapping, loff_t from); extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); -extern qsize_t ext4_get_reserved_space(struct inode *inode); +extern qsize_t* ext4_get_reserved_space(struct inode *inode); extern int flush_aio_dio_completed_IO(struct inode *inode); /* ioctl.c */ extern long ext4_ioctl(struct file *, unsigned int, unsigned long); diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index f693768..7fa6db6 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1048,17 +1048,12 @@ out: return err; } -qsize_t ext4_get_reserved_space(struct inode *inode) +#ifdef CONFIG_QUOTA +qsize_t* ext4_get_reserved_space(struct inode *inode) { - unsigned long long total; - - spin_lock(&EXT4_I(inode)->i_block_reservation_lock); - total = EXT4_I(inode)->i_reserved_data_blocks + - EXT4_I(inode)->i_reserved_meta_blocks; - spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); - - return (total << inode->i_blkbits); + return &EXT4_I(inode)->i_reserved_quota; } +#endif /* * Calculate the number of metadata blocks need to reserve * to allocate @blocks for non extent file based file @@ -5046,6 +5041,9 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino) ((__u64)le16_to_cpu(raw_inode->i_file_acl_high)) << 32; inode->i_size = ext4_isize(raw_inode); ei->i_disksize = inode->i_size; +#ifdef CONFIG_QUOTA + ei->i_reserved_quota = 0; +#endif inode->i_generation = le32_to_cpu(raw_inode->i_generation); ei->i_block_group = iloc.block_group; ei->i_last_alloc_group = ~0; diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 4c87d97..4697272 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -713,6 +713,9 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) spin_lock_init(&(ei->i_block_reservation_lock)); INIT_LIST_HEAD(&ei->i_aio_dio_complete_list); ei->cur_aio_dio = NULL; +#ifdef CONFIG_QUOTA + ei->i_reserved_quota = 0; +#endif return &ei->vfs_inode; } -- 1.6.0.4