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authorJean Noel Cordenner <jean-noel.cordenner@bull.net>2008-01-28 23:58:27 -0500
committerTheodore Ts'o <tytso@mit.edu>2008-01-28 23:58:27 -0500
commit25ec56b518257a56d2ff41a941d288e4b5ff9488 (patch)
tree77e84d38a5ad242f9d73a006f009649f223378f1 /fs
parent7a224228ed79d587ece2304869000aad1b8e97dd (diff)
ext4: Add inode version support in ext4
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. This field is incremented in case the ext4_inode is large enough. A i_version mount option has been added to enable the feature. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Kalpak Shah <kalpak@clusterfs.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@bull.net>
Diffstat (limited to 'fs')
-rw-r--r--fs/ext4/inode.c18
-rw-r--r--fs/ext4/super.c10
-rw-r--r--fs/inode.c17
3 files changed, 25 insertions, 20 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 89cd35386ff5..a06a3b7cfc34 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2781,6 +2781,13 @@ void ext4_read_inode(struct inode * inode)
2781 EXT4_INODE_GET_XTIME(i_atime, inode, raw_inode); 2781 EXT4_INODE_GET_XTIME(i_atime, inode, raw_inode);
2782 EXT4_EINODE_GET_XTIME(i_crtime, ei, raw_inode); 2782 EXT4_EINODE_GET_XTIME(i_crtime, ei, raw_inode);
2783 2783
2784 inode->i_version = le32_to_cpu(raw_inode->i_disk_version);
2785 if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
2786 if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
2787 inode->i_version |=
2788 (__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32;
2789 }
2790
2784 if (S_ISREG(inode->i_mode)) { 2791 if (S_ISREG(inode->i_mode)) {
2785 inode->i_op = &ext4_file_inode_operations; 2792 inode->i_op = &ext4_file_inode_operations;
2786 inode->i_fop = &ext4_file_operations; 2793 inode->i_fop = &ext4_file_operations;
@@ -2963,8 +2970,14 @@ static int ext4_do_update_inode(handle_t *handle,
2963 } else for (block = 0; block < EXT4_N_BLOCKS; block++) 2970 } else for (block = 0; block < EXT4_N_BLOCKS; block++)
2964 raw_inode->i_block[block] = ei->i_data[block]; 2971 raw_inode->i_block[block] = ei->i_data[block];
2965 2972
2966 if (ei->i_extra_isize) 2973 raw_inode->i_disk_version = cpu_to_le32(inode->i_version);
2974 if (ei->i_extra_isize) {
2975 if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
2976 raw_inode->i_version_hi =
2977 cpu_to_le32(inode->i_version >> 32);
2967 raw_inode->i_extra_isize = cpu_to_le16(ei->i_extra_isize); 2978 raw_inode->i_extra_isize = cpu_to_le16(ei->i_extra_isize);
2979 }
2980
2968 2981
2969 BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata"); 2982 BUFFER_TRACE(bh, "call ext4_journal_dirty_metadata");
2970 rc = ext4_journal_dirty_metadata(handle, bh); 2983 rc = ext4_journal_dirty_metadata(handle, bh);
@@ -3191,6 +3204,9 @@ int ext4_mark_iloc_dirty(handle_t *handle,
3191{ 3204{
3192 int err = 0; 3205 int err = 0;
3193 3206
3207 if (test_opt(inode->i_sb, I_VERSION))
3208 inode_inc_iversion(inode);
3209
3194 /* the do_update_inode consumes one bh->b_count */ 3210 /* the do_update_inode consumes one bh->b_count */
3195 get_bh(iloc->bh); 3211 get_bh(iloc->bh);
3196 3212
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f7479d30735e..aa22acd6eb06 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -732,6 +732,8 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
732 seq_puts(seq, ",nobh"); 732 seq_puts(seq, ",nobh");
733 if (!test_opt(sb, EXTENTS)) 733 if (!test_opt(sb, EXTENTS))
734 seq_puts(seq, ",noextents"); 734 seq_puts(seq, ",noextents");
735 if (test_opt(sb, I_VERSION))
736 seq_puts(seq, ",i_version");
735 737
736 if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 738 if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
737 seq_puts(seq, ",data=journal"); 739 seq_puts(seq, ",data=journal");
@@ -874,7 +876,7 @@ enum {
874 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 876 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
875 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 877 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
876 Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 878 Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
877 Opt_grpquota, Opt_extents, Opt_noextents, 879 Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version,
878}; 880};
879 881
880static match_table_t tokens = { 882static match_table_t tokens = {
@@ -928,6 +930,7 @@ static match_table_t tokens = {
928 {Opt_barrier, "barrier=%u"}, 930 {Opt_barrier, "barrier=%u"},
929 {Opt_extents, "extents"}, 931 {Opt_extents, "extents"},
930 {Opt_noextents, "noextents"}, 932 {Opt_noextents, "noextents"},
933 {Opt_i_version, "i_version"},
931 {Opt_err, NULL}, 934 {Opt_err, NULL},
932 {Opt_resize, "resize"}, 935 {Opt_resize, "resize"},
933}; 936};
@@ -1273,6 +1276,10 @@ clear_qf_name:
1273 case Opt_noextents: 1276 case Opt_noextents:
1274 clear_opt (sbi->s_mount_opt, EXTENTS); 1277 clear_opt (sbi->s_mount_opt, EXTENTS);
1275 break; 1278 break;
1279 case Opt_i_version:
1280 set_opt(sbi->s_mount_opt, I_VERSION);
1281 sb->s_flags |= MS_I_VERSION;
1282 break;
1276 default: 1283 default:
1277 printk (KERN_ERR 1284 printk (KERN_ERR
1278 "EXT4-fs: Unrecognized mount option \"%s\" " 1285 "EXT4-fs: Unrecognized mount option \"%s\" "
@@ -3197,7 +3204,6 @@ out:
3197 i_size_write(inode, off+len-towrite); 3204 i_size_write(inode, off+len-towrite);
3198 EXT4_I(inode)->i_disksize = inode->i_size; 3205 EXT4_I(inode)->i_disksize = inode->i_size;
3199 } 3206 }
3200 inode->i_version++;
3201 inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3207 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
3202 ext4_mark_inode_dirty(handle, inode); 3208 ext4_mark_inode_dirty(handle, inode);
3203 mutex_unlock(&inode->i_mutex); 3209 mutex_unlock(&inode->i_mutex);
diff --git a/fs/inode.c b/fs/inode.c
index b48324a94c2b..276ffd6b6fdd 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1243,23 +1243,6 @@ void touch_atime(struct vfsmount *mnt, struct dentry *dentry)
1243EXPORT_SYMBOL(touch_atime); 1243EXPORT_SYMBOL(touch_atime);
1244 1244
1245/** 1245/**
1246 * inode_inc_iversion - increments i_version
1247 * @inode: inode that need to be updated
1248 *
1249 * Every time the inode is modified, the i_version field
1250 * will be incremented.
1251 * The filesystem has to be mounted with i_version flag
1252 *
1253 */
1254
1255void inode_inc_iversion(struct inode *inode)
1256{
1257 spin_lock(&inode->i_lock);
1258 inode->i_version++;
1259 spin_unlock(&inode->i_lock);
1260}
1261
1262/**
1263 * file_update_time - update mtime and ctime time 1246 * file_update_time - update mtime and ctime time
1264 * @file: file accessed 1247 * @file: file accessed
1265 * 1248 *