From: Mingming Cao Subject: [EXT4 set 4][PATCH 3/5] i_version:ext4 inode version read/store Date: Sun, 01 Jul 2007 03:37:36 -0400 Message-ID: <1183275456.4010.129.camel@localhost.localdomain> Reply-To: cmm@us.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, nfsv4@linux-nfs.org Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: nfsv4-bounces@linux-nfs.org Errors-To: nfsv4-bounces@linux-nfs.org List-Id: linux-ext4.vger.kernel.org This patch adds 64-bit inode version support to ext4. The lower 32 bits are stored in the osd1.linux1.l_i_version field while the high 32 bits are stored in the i_version_hi field newly created in the ext4_inode. Signed-off-by: Kalpak Shah Signed-off-by: Mingming Cao Index: linux-2.6.21/fs/ext4/inode.c =================================================================== --- linux-2.6.21.orig/fs/ext4/inode.c +++ linux-2.6.21/fs/ext4/inode.c @@ -2709,6 +2709,13 @@ void ext4_read_inode(struct inode * inod EXT4_INODE_GET_XTIME(i_atime, inode, raw_inode); EXT4_EINODE_GET_XTIME(i_crtime, ei, raw_inode); + inode->i_version = le32_to_cpu(raw_inode->i_disk_version); + if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) { + if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi)) + inode->i_version |= + (__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32; + } + if (S_ISREG(inode->i_mode)) { inode->i_op = &ext4_file_inode_operations; inode->i_fop = &ext4_file_operations; @@ -2852,8 +2859,14 @@ static int ext4_do_update_inode(handle_t } else for (block = 0; block < EXT4_N_BLOCKS; block++) raw_inode->i_block[block] = ei->i_data[block]; - if (ei->i_extra_isize) + raw_inode->i_disk_version = cpu_to_le32(inode->i_version); + if (ei->i_extra_isize) { + if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi)) { + raw_inode->i_version_hi = + cpu_to_le32(inode->i_version >> 32); + } raw_inode->i_extra_isize = cpu_to_le16(ei->i_extra_isize); + } BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata"); rc = ext4_journal_dirty_metadata(handle, bh); Index: linux-2.6.21/include/linux/ext4_fs.h =================================================================== --- linux-2.6.21.orig/include/linux/ext4_fs.h +++ linux-2.6.21/include/linux/ext4_fs.h @@ -297,7 +297,7 @@ struct ext4_inode { __le32 i_flags; /* File flags */ union { struct { - __u32 l_i_reserved1; + __u32 l_i_version; } linux1; struct { __u32 h_i_translator; @@ -406,6 +406,8 @@ do { \ raw_inode->xtime ## _extra); \ } while (0) +#define i_disk_version osd1.linux1.l_i_version + #if defined(__KERNEL__) || defined(__linux__) #define i_reserved1 osd1.linux1.l_i_reserved1 #define i_frag osd2.linux2.l_i_frag