diff options
| -rw-r--r-- | fs/ext4/inode.c | 18 | ||||
| -rw-r--r-- | fs/ext4/super.c | 10 | ||||
| -rw-r--r-- | fs/inode.c | 17 | ||||
| -rw-r--r-- | include/linux/ext4_fs.h | 6 | ||||
| -rw-r--r-- | include/linux/fs.h | 16 |
5 files changed, 45 insertions, 22 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) 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; @@ -2963,8 +2970,14 @@ static int ext4_do_update_inode(handle_t *handle, } 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); @@ -3191,6 +3204,9 @@ int ext4_mark_iloc_dirty(handle_t *handle, { int err = 0; + if (test_opt(inode->i_sb, I_VERSION)) + inode_inc_iversion(inode); + /* the do_update_inode consumes one bh->b_count */ get_bh(iloc->bh); 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) seq_puts(seq, ",nobh"); if (!test_opt(sb, EXTENTS)) seq_puts(seq, ",noextents"); + if (test_opt(sb, I_VERSION)) + seq_puts(seq, ",i_version"); if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) seq_puts(seq, ",data=journal"); @@ -874,7 +876,7 @@ enum { Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, - Opt_grpquota, Opt_extents, Opt_noextents, + Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version, }; static match_table_t tokens = { @@ -928,6 +930,7 @@ static match_table_t tokens = { {Opt_barrier, "barrier=%u"}, {Opt_extents, "extents"}, {Opt_noextents, "noextents"}, + {Opt_i_version, "i_version"}, {Opt_err, NULL}, {Opt_resize, "resize"}, }; @@ -1273,6 +1276,10 @@ clear_qf_name: case Opt_noextents: clear_opt (sbi->s_mount_opt, EXTENTS); break; + case Opt_i_version: + set_opt(sbi->s_mount_opt, I_VERSION); + sb->s_flags |= MS_I_VERSION; + break; default: printk (KERN_ERR "EXT4-fs: Unrecognized mount option \"%s\" " @@ -3197,7 +3204,6 @@ out: i_size_write(inode, off+len-towrite); EXT4_I(inode)->i_disksize = inode->i_size; } - inode->i_version++; inode->i_mtime = inode->i_ctime = CURRENT_TIME; ext4_mark_inode_dirty(handle, inode); 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) EXPORT_SYMBOL(touch_atime); /** - * inode_inc_iversion - increments i_version - * @inode: inode that need to be updated - * - * Every time the inode is modified, the i_version field - * will be incremented. - * The filesystem has to be mounted with i_version flag - * - */ - -void inode_inc_iversion(struct inode *inode) -{ - spin_lock(&inode->i_lock); - inode->i_version++; - spin_unlock(&inode->i_lock); -} - -/** * file_update_time - update mtime and ctime time * @file: file accessed * diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h index cd406dba0e64..b6092940c8b8 100644 --- a/include/linux/ext4_fs.h +++ b/include/linux/ext4_fs.h @@ -292,7 +292,7 @@ struct ext4_inode { __le32 i_flags; /* File flags */ union { struct { - __u32 l_i_reserved1; + __le32 l_i_version; } linux1; struct { __u32 h_i_translator; @@ -334,6 +334,7 @@ struct ext4_inode { __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ __le32 i_crtime; /* File Creation time */ __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ + __le32 i_version_hi; /* high 32 bits for 64-bit version */ }; @@ -407,6 +408,8 @@ 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_file_acl_high osd2.linux2.l_i_file_acl_high @@ -469,6 +472,7 @@ do { \ #define EXT4_MOUNT_EXTENTS 0x400000 /* Extents support */ #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ +#define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */ /* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */ #ifndef _LINUX_EXT2_FS_H #define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt diff --git a/include/linux/fs.h b/include/linux/fs.h index 9608839552b3..a516b6716870 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1396,7 +1396,21 @@ static inline void inode_dec_link_count(struct inode *inode) mark_inode_dirty(inode); } -extern void inode_inc_iversion(struct inode *inode); +/** + * inode_inc_iversion - increments i_version + * @inode: inode that need to be updated + * + * Every time the inode is modified, the i_version field will be incremented. + * The filesystem has to be mounted with i_version flag + */ + +static inline void inode_inc_iversion(struct inode *inode) +{ + spin_lock(&inode->i_lock); + inode->i_version++; + spin_unlock(&inode->i_lock); +} + extern void touch_atime(struct vfsmount *mnt, struct dentry *dentry); static inline void file_accessed(struct file *file) { |