you will need to merge your changes with the version from e2fsprogs
1.41.x.
- - Create a new filesystem using the ext4dev filesystem type:
+ - Create a new filesystem using the ext4 filesystem type:
- # mke2fs -t ext4dev /dev/hda1
+ # mke2fs -t ext4 /dev/hda1
Or configure an existing ext3 filesystem to support extents and set
the test_fs flag to indicate that it's ok for an in-development
# tune2fs -I 256 /dev/hda1
- (Note: we currently do not have tools to convert an ext4dev
+ (Note: we currently do not have tools to convert an ext4
filesystem back to ext3; so please do not do try this on production
filesystems.)
- Mounting:
- # mount -t ext4dev /dev/hda1 /wherever
+ # mount -t ext4 /dev/hda1 /wherever
- When comparing performance with other filesystems, remember that
ext3/4 by default offers higher data integrity guarantees than most.
If you are not using a security module that requires using
extended attributes for file security labels, say N.
-config EXT4DEV_FS
- tristate "Ext4dev/ext4 extended fs support development (EXPERIMENTAL)"
- depends on EXPERIMENTAL
+config EXT4_FS
+ tristate "The Extended 4 (ext4) filesystem"
select JBD2
select CRC16
help
- Ext4dev is a predecessor filesystem of the next generation
- extended fs ext4, based on ext3 filesystem code. It will be
- renamed ext4 fs later, once ext4dev is mature and stabilized.
+ This is the next generation of the ext3 filesystem.
Unlike the change from ext2 filesystem to ext3 filesystem,
- the on-disk format of ext4dev is not the same as ext3 any more:
- it is based on extent maps and it supports 48-bit physical block
- numbers. These combined on-disk format changes will allow
- ext4dev/ext4 to handle more than 16 TB filesystem volumes --
- a hard limit that ext3 cannot overcome without changing the
- on-disk format.
-
- Other than extent maps and 48-bit block numbers, ext4dev also is
- likely to have other new features such as persistent preallocation,
- high resolution time stamps, and larger file support etc. These
- features will be added to ext4dev gradually.
+ the on-disk format of ext4 is not forwards compatible with
+ ext3; it is based on extent maps and it supports 48-bit
+ physical block numbers. The ext4 filesystem also supports delayed
+ allocation, persistent preallocation, high resolution time stamps,
+ and a number of other features to improve performance and speed
+ up fsck time. For more information, please see the web pages at
+ http://ext4.wiki.kernel.org.
+
+ The ext4 filesystem will support mounting an ext3
+ filesystem; while there will be some performance gains from
+ the delayed allocation and inode table readahead, the best
+ performance gains will require enabling ext4 features in the
+ filesystem, or formating a new filesystem as an ext4
+ filesystem initially.
To compile this file system support as a module, choose M here. The
module will be called ext4dev.
If unsure, say N.
-config EXT4DEV_FS_XATTR
- bool "Ext4dev extended attributes"
- depends on EXT4DEV_FS
+config EXT4DEV_COMPAT
+ bool "Enable ext4dev compatibility"
+ depends on EXT4_FS
+ help
+ Starting with 2.6.28, the name of the ext4 filesystem was
+ renamed from ext4dev to ext4. Unfortunately there are some
+ lagecy userspace programs (such as klibc's fstype) have
+ "ext4dev" hardcoded.
+
+ To enable backwards compatibility so that systems that are
+ still expecting to mount ext4 filesystems using ext4dev,
+ chose Y here. This feature will go away by 2.6.31, so
+ please arrange to get your userspace programs fixed!
+
+config EXT4_FS_XATTR
+ bool "Ext4 extended attributes"
+ depends on EXT4_FS
default y
help
Extended attributes are name:value pairs associated with inodes by
If unsure, say N.
- You need this for POSIX ACL support on ext4dev/ext4.
+ You need this for POSIX ACL support on ext4.
-config EXT4DEV_FS_POSIX_ACL
- bool "Ext4dev POSIX Access Control Lists"
- depends on EXT4DEV_FS_XATTR
+config EXT4_FS_POSIX_ACL
+ bool "Ext4 POSIX Access Control Lists"
+ depends on EXT4_FS_XATTR
select FS_POSIX_ACL
help
POSIX Access Control Lists (ACLs) support permissions for users and
If you don't know what Access Control Lists are, say N
-config EXT4DEV_FS_SECURITY
- bool "Ext4dev Security Labels"
- depends on EXT4DEV_FS_XATTR
+config EXT4_FS_SECURITY
+ bool "Ext4 Security Labels"
+ depends on EXT4_FS_XATTR
help
Security labels support alternative access control models
implemented by security modules like SELinux. This option
enables an extended attribute handler for file security
- labels in the ext4dev/ext4 filesystem.
+ labels in the ext4 filesystem.
If you are not using a security module that requires using
extended attributes for file security labels, say N.
help
This is a generic journaling layer for block devices that support
both 32-bit and 64-bit block numbers. It is currently used by
- the ext4dev/ext4 filesystem, but it could also be used to add
+ the ext4 filesystem, but it could also be used to add
journal support to other file systems or block devices such
as RAID or LVM.
- If you are using ext4dev/ext4, you need to say Y here. If you are not
- using ext4dev/ext4 then you will probably want to say N.
+ If you are using ext4, you need to say Y here. If you are not
+ using ext4 then you will probably want to say N.
To compile this device as a module, choose M here. The module will be
- called jbd2. If you are compiling ext4dev/ext4 into the kernel,
+ called jbd2. If you are compiling ext4 into the kernel,
you cannot compile this code as a module.
config JBD2_DEBUG
- bool "JBD2 (ext4dev/ext4) debugging support"
+ bool "JBD2 (ext4) debugging support"
depends on JBD2 && DEBUG_FS
help
- If you are using the ext4dev/ext4 journaled file system (or
+ If you are using the ext4 journaled file system (or
potentially any other filesystem/device using JBD2), this option
allows you to enable debugging output while the system is running,
in order to help track down any problems you are having.
config FS_MBCACHE
# Meta block cache for Extended Attributes (ext2/ext3/ext4)
tristate
- depends on EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4DEV_FS_XATTR
- default y if EXT2_FS=y || EXT3_FS=y || EXT4DEV_FS=y
- default m if EXT2_FS=m || EXT3_FS=m || EXT4DEV_FS=m
+ depends on EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4_FS_XATTR
+ default y if EXT2_FS=y || EXT3_FS=y || EXT4_FS=y
+ default m if EXT2_FS=m || EXT3_FS=m || EXT4_FS=m
config REISERFS_FS
tristate "Reiserfs support"
# Do not add any filesystems before this line
obj-$(CONFIG_REISERFS_FS) += reiserfs/
obj-$(CONFIG_EXT3_FS) += ext3/ # Before ext2 so root fs can be ext3
-obj-$(CONFIG_EXT4DEV_FS) += ext4/ # Before ext2 so root fs can be ext4dev
+obj-$(CONFIG_EXT4_FS) += ext4/ # Before ext2 so root fs can be ext4dev
obj-$(CONFIG_JBD) += jbd/
obj-$(CONFIG_JBD2) += jbd2/
obj-$(CONFIG_EXT2_FS) += ext2/
# Makefile for the linux ext4-filesystem routines.
#
-obj-$(CONFIG_EXT4DEV_FS) += ext4dev.o
+obj-$(CONFIG_EXT4_FS) += ext4.o
-ext4dev-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \
+ext4-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \
ioctl.o namei.o super.o symlink.o hash.o resize.o extents.o \
ext4_jbd2.o migrate.o mballoc.o
-ext4dev-$(CONFIG_EXT4DEV_FS_XATTR) += xattr.o xattr_user.o xattr_trusted.o
-ext4dev-$(CONFIG_EXT4DEV_FS_POSIX_ACL) += acl.o
-ext4dev-$(CONFIG_EXT4DEV_FS_SECURITY) += xattr_security.o
+ext4-$(CONFIG_EXT4_FS_XATTR) += xattr.o xattr_user.o xattr_trusted.o
+ext4-$(CONFIG_EXT4_FS_POSIX_ACL) += acl.o
+ext4-$(CONFIG_EXT4_FS_SECURITY) += xattr_security.o
}
}
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
/* Value for inode->u.ext4_i.i_acl and inode->u.ext4_i.i_default_acl
if the ACL has not been cached */
extern int ext4_acl_chmod(struct inode *);
extern int ext4_init_acl(handle_t *, struct inode *, struct inode *);
-#else /* CONFIG_EXT4DEV_FS_POSIX_ACL */
+#else /* CONFIG_EXT4_FS_POSIX_ACL */
#include <linux/sched.h>
#define ext4_permission NULL
{
return 0;
}
-#endif /* CONFIG_EXT4DEV_FS_POSIX_ACL */
+#endif /* CONFIG_EXT4_FS_POSIX_ACL */
__u32 i_state; /* Dynamic state flags for ext4 */
ext4_lblk_t i_dir_start_lookup;
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
/*
* Extended attributes can be read independently of the main file
* data. Taking i_mutex even when reading would cause contention
*/
struct rw_semaphore xattr_sem;
#endif
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
struct posix_acl *i_acl;
struct posix_acl *i_default_acl;
#endif
.truncate = ext4_truncate,
.setattr = ext4_setattr,
.getattr = ext4_getattr,
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
return inode;
ei = EXT4_I(inode);
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
ei->i_acl = EXT4_ACL_NOT_CACHED;
ei->i_default_acl = EXT4_ACL_NOT_CACHED;
#endif
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
init_special_inode(inode, inode->i_mode, rdev);
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
inode->i_op = &ext4_special_inode_operations;
#endif
err = ext4_add_nondir(handle, dentry, inode);
.mknod = ext4_mknod,
.rename = ext4_rename,
.setattr = ext4_setattr,
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
const struct inode_operations ext4_special_inode_operations = {
.setattr = ext4_setattr,
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS);
if (!ei)
return NULL;
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
ei->i_acl = EXT4_ACL_NOT_CACHED;
ei->i_default_acl = EXT4_ACL_NOT_CACHED;
#endif
struct ext4_inode_info *ei = (struct ext4_inode_info *) foo;
INIT_LIST_HEAD(&ei->i_orphan);
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
init_rwsem(&ei->xattr_sem);
#endif
init_rwsem(&ei->i_data_sem);
static void ext4_clear_inode(struct inode *inode)
{
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
if (EXT4_I(inode)->i_acl &&
EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) {
posix_acl_release(EXT4_I(inode)->i_acl);
seq_puts(seq, ",debug");
if (test_opt(sb, OLDALLOC))
seq_puts(seq, ",oldalloc");
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
if (test_opt(sb, XATTR_USER) &&
!(def_mount_opts & EXT4_DEFM_XATTR_USER))
seq_puts(seq, ",user_xattr");
seq_puts(seq, ",nouser_xattr");
}
#endif
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL))
seq_puts(seq, ",acl");
if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL))
case Opt_orlov:
clear_opt(sbi->s_mount_opt, OLDALLOC);
break;
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
case Opt_user_xattr:
set_opt(sbi->s_mount_opt, XATTR_USER);
break;
"not supported\n");
break;
#endif
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
case Opt_acl:
set_opt(sbi->s_mount_opt, POSIX_ACL);
break;
set_opt(sbi->s_mount_opt, GRPID);
if (def_mount_opts & EXT4_DEFM_UID16)
set_opt(sbi->s_mount_opt, NO_UID32);
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
if (def_mount_opts & EXT4_DEFM_XATTR_USER)
set_opt(sbi->s_mount_opt, XATTR_USER);
#endif
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
if (def_mount_opts & EXT4_DEFM_ACL)
set_opt(sbi->s_mount_opt, POSIX_ACL);
#endif
"EXT4-fs warning: feature flags set on rev 0 fs, "
"running e2fsck is recommended\n");
- /*
- * Since ext4 is still considered development code, we require
- * that the TEST_FILESYS flag in s->flags be set.
- */
- if (!(le32_to_cpu(es->s_flags) & EXT2_FLAGS_TEST_FILESYS)) {
- printk(KERN_WARNING "EXT4-fs: %s: not marked "
- "OK to use with test code.\n", sb->s_id);
- goto failed_mount;
- }
-
/*
* Check feature flags regardless of the revision level, since we
* previously didn't change the revision level when setting the flags,
};
#endif
+static struct file_system_type ext4_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "ext4",
+ .get_sb = ext4_get_sb,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+
+#ifdef CONFIG_EXT4DEV_COMPAT
+static int ext4dev_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
+{
+ printk(KERN_WARNING "EXT4-fs: Update your userspace programs "
+ "to mount using ext4\n");
+ printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility "
+ "will go away by 2.6.31\n");
+ return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt);
+}
+
static struct file_system_type ext4dev_fs_type = {
.owner = THIS_MODULE,
.name = "ext4dev",
- .get_sb = ext4_get_sb,
+ .get_sb = ext4dev_get_sb,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
+MODULE_ALIAS("ext4dev");
+#endif
static int __init init_ext4_fs(void)
{
err = init_inodecache();
if (err)
goto out1;
- err = register_filesystem(&ext4dev_fs_type);
+ err = register_filesystem(&ext4_fs_type);
if (err)
goto out;
+#ifdef CONFIG_EXT4DEV_COMPAT
+ err = register_filesystem(&ext4dev_fs_type);
+ if (err) {
+ unregister_filesystem(&ext4_fs_type);
+ goto out;
+ }
+#endif
return 0;
out:
destroy_inodecache();
static void __exit exit_ext4_fs(void)
{
+ unregister_filesystem(&ext4_fs_type);
+#ifdef CONFIG_EXT4DEV_COMPAT
unregister_filesystem(&ext4dev_fs_type);
+#endif
destroy_inodecache();
exit_ext4_xattr();
exit_ext4_mballoc();
.readlink = generic_readlink,
.follow_link = page_follow_link_light,
.put_link = page_put_link,
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
const struct inode_operations ext4_fast_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = ext4_follow_link,
-#ifdef CONFIG_EXT4DEV_FS_XATTR
+#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
static struct xattr_handler *ext4_xattr_handler_map[] = {
[EXT4_XATTR_INDEX_USER] = &ext4_xattr_user_handler,
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
[EXT4_XATTR_INDEX_POSIX_ACL_ACCESS] = &ext4_xattr_acl_access_handler,
[EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT] = &ext4_xattr_acl_default_handler,
#endif
[EXT4_XATTR_INDEX_TRUSTED] = &ext4_xattr_trusted_handler,
-#ifdef CONFIG_EXT4DEV_FS_SECURITY
+#ifdef CONFIG_EXT4_FS_SECURITY
[EXT4_XATTR_INDEX_SECURITY] = &ext4_xattr_security_handler,
#endif
};
struct xattr_handler *ext4_xattr_handlers[] = {
&ext4_xattr_user_handler,
&ext4_xattr_trusted_handler,
-#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
+#ifdef CONFIG_EXT4_FS_POSIX_ACL
&ext4_xattr_acl_access_handler,
&ext4_xattr_acl_default_handler,
#endif
-#ifdef CONFIG_EXT4DEV_FS_SECURITY
+#ifdef CONFIG_EXT4_FS_SECURITY
&ext4_xattr_security_handler,
#endif
NULL
EXT4_I(inode)->i_extra_isize))
#define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
-# ifdef CONFIG_EXT4DEV_FS_XATTR
+# ifdef CONFIG_EXT4_FS_XATTR
extern struct xattr_handler ext4_xattr_user_handler;
extern struct xattr_handler ext4_xattr_trusted_handler;
extern struct xattr_handler *ext4_xattr_handlers[];
-# else /* CONFIG_EXT4DEV_FS_XATTR */
+# else /* CONFIG_EXT4_FS_XATTR */
static inline int
ext4_xattr_get(struct inode *inode, int name_index, const char *name,
#define ext4_xattr_handlers NULL
-# endif /* CONFIG_EXT4DEV_FS_XATTR */
+# endif /* CONFIG_EXT4_FS_XATTR */
-#ifdef CONFIG_EXT4DEV_FS_SECURITY
+#ifdef CONFIG_EXT4_FS_SECURITY
extern int ext4_init_security(handle_t *handle, struct inode *inode,
struct inode *dir);
#else
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff