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* [PATCH] efs: Remove EFS
@ 2026-06-18 21:18 Matthew Wilcox (Oracle)
  2026-06-19  9:28 ` Jori Koolstra
  2026-06-25 19:42 ` Darrick J. Wong
  0 siblings, 2 replies; 7+ messages in thread
From: Matthew Wilcox (Oracle) @ 2026-06-18 21:18 UTC (permalink / raw)
  To: Christian Brauner; +Cc: Matthew Wilcox (Oracle), linux-fsdevel

The kernel EFS code has been unmaintained for over twenty years.
It was superseded on IRIX around thirty years ago.  I haven't seen an
EFS filesystem in the wild since 1999.  Userspace tools to read EFS
filesystems exist, such as https://github.com/jkbenaim/efsextract

There's no benefit to keeping this filesystem in the kernel, and it only
increases the maintenance burden for tree-wide changes.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 MAINTAINERS                    |   5 -
 fs/Kconfig                     |   1 -
 fs/Makefile                    |   1 -
 fs/efs/Kconfig                 |  16 --
 fs/efs/Makefile                |   8 -
 fs/efs/dir.c                   | 105 ----------
 fs/efs/efs.h                   | 144 -------------
 fs/efs/file.c                  |  57 -----
 fs/efs/inode.c                 | 315 ----------------------------
 fs/efs/namei.c                 | 120 -----------
 fs/efs/super.c                 | 368 ---------------------------------
 fs/efs/symlink.c               |  50 -----
 include/linux/efs_vh.h         |  54 -----
 include/uapi/linux/efs_fs_sb.h |  63 ------
 14 files changed, 1307 deletions(-)
 delete mode 100644 fs/efs/Kconfig
 delete mode 100644 fs/efs/Makefile
 delete mode 100644 fs/efs/dir.c
 delete mode 100644 fs/efs/efs.h
 delete mode 100644 fs/efs/file.c
 delete mode 100644 fs/efs/inode.c
 delete mode 100644 fs/efs/namei.c
 delete mode 100644 fs/efs/super.c
 delete mode 100644 fs/efs/symlink.c
 delete mode 100644 include/linux/efs_vh.h
 delete mode 100644 include/uapi/linux/efs_fs_sb.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 629b22c6c21e..3c74e23921d2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9427,11 +9427,6 @@ L:	linux-fbdev@vger.kernel.org
 S:	Maintained
 F:	drivers/video/fbdev/efifb.c
 
-EFS FILESYSTEM
-S:	Orphan
-W:	http://aeschi.ch.eu.org/efs/
-F:	fs/efs/
-
 EHEA (IBM pSeries eHEA 10Gb ethernet adapter) DRIVER
 L:	netdev@vger.kernel.org
 S:	Orphan
diff --git a/fs/Kconfig b/fs/Kconfig
index 43cb06de297f..8089639db25c 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -315,7 +315,6 @@ source "fs/hfs/Kconfig"
 source "fs/hfsplus/Kconfig"
 source "fs/befs/Kconfig"
 source "fs/bfs/Kconfig"
-source "fs/efs/Kconfig"
 source "fs/jffs2/Kconfig"
 # UBIFS File system configuration
 source "fs/ubifs/Kconfig"
diff --git a/fs/Makefile b/fs/Makefile
index ae1b07f9c6a0..3a11a7d87832 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -93,7 +93,6 @@ obj-$(CONFIG_HPFS_FS)		+= hpfs/
 obj-$(CONFIG_NTFS_FS)		+= ntfs/
 obj-$(CONFIG_NTFS3_FS)		+= ntfs3/
 obj-$(CONFIG_UFS_FS)		+= ufs/
-obj-$(CONFIG_EFS_FS)		+= efs/
 obj-$(CONFIG_JFFS2_FS)		+= jffs2/
 obj-$(CONFIG_UBIFS_FS)		+= ubifs/
 obj-$(CONFIG_AFFS_FS)		+= affs/
diff --git a/fs/efs/Kconfig b/fs/efs/Kconfig
deleted file mode 100644
index 0833e533df9d..000000000000
--- a/fs/efs/Kconfig
+++ /dev/null
@@ -1,16 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-config EFS_FS
-	tristate "EFS file system support (read only)"
-	depends on BLOCK
-	select BUFFER_HEAD
-	help
-	  EFS is an older file system used for non-ISO9660 CD-ROMs and hard
-	  disk partitions by SGI's IRIX operating system (IRIX 6.0 and newer
-	  uses the XFS file system for hard disk partitions however).
-
-	  This implementation only offers read-only access. If you don't know
-	  what all this is about, it's safe to say N. For more information
-	  about EFS see its home page at <http://aeschi.ch.eu.org/efs/>.
-
-	  To compile the EFS file system support as a module, choose M here: the
-	  module will be called efs.
diff --git a/fs/efs/Makefile b/fs/efs/Makefile
deleted file mode 100644
index 85e5b88f9471..000000000000
--- a/fs/efs/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for the linux efs-filesystem routines.
-#
-
-obj-$(CONFIG_EFS_FS) += efs.o
-
-efs-objs := super.o inode.o namei.o dir.o file.o symlink.o
diff --git a/fs/efs/dir.c b/fs/efs/dir.c
deleted file mode 100644
index 35ad0092c115..000000000000
--- a/fs/efs/dir.c
+++ /dev/null
@@ -1,105 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * dir.c
- *
- * Copyright (c) 1999 Al Smith
- */
-
-#include <linux/buffer_head.h>
-#include <linux/filelock.h>
-#include "efs.h"
-
-static int efs_readdir(struct file *, struct dir_context *);
-
-const struct file_operations efs_dir_operations = {
-	.llseek		= generic_file_llseek,
-	.read		= generic_read_dir,
-	.iterate_shared	= efs_readdir,
-	.setlease	= generic_setlease,
-};
-
-const struct inode_operations efs_dir_inode_operations = {
-	.lookup		= efs_lookup,
-};
-
-static int efs_readdir(struct file *file, struct dir_context *ctx)
-{
-	struct inode *inode = file_inode(file);
-	efs_block_t		block;
-	int			slot;
-
-	if (inode->i_size & (EFS_DIRBSIZE-1))
-		pr_warn("%s(): directory size not a multiple of EFS_DIRBSIZE\n",
-			__func__);
-
-	/* work out where this entry can be found */
-	block = ctx->pos >> EFS_DIRBSIZE_BITS;
-
-	/* each block contains at most 256 slots */
-	slot  = ctx->pos & 0xff;
-
-	/* look at all blocks */
-	while (block < inode->i_blocks) {
-		struct efs_dir		*dirblock;
-		struct buffer_head *bh;
-
-		/* read the dir block */
-		bh = sb_bread(inode->i_sb, efs_bmap(inode, block));
-
-		if (!bh) {
-			pr_err("%s(): failed to read dir block %d\n",
-			       __func__, block);
-			break;
-		}
-
-		dirblock = (struct efs_dir *) bh->b_data; 
-
-		if (be16_to_cpu(dirblock->magic) != EFS_DIRBLK_MAGIC) {
-			pr_err("%s(): invalid directory block\n", __func__);
-			brelse(bh);
-			break;
-		}
-
-		for (; slot < dirblock->slots; slot++) {
-			struct efs_dentry *dirslot;
-			efs_ino_t inodenum;
-			const char *nameptr;
-			int namelen;
-
-			if (dirblock->space[slot] == 0)
-				continue;
-
-			dirslot  = (struct efs_dentry *) (((char *) bh->b_data) + EFS_SLOTAT(dirblock, slot));
-
-			inodenum = be32_to_cpu(dirslot->inode);
-			namelen  = dirslot->namelen;
-			nameptr  = dirslot->name;
-			pr_debug("%s(): block %d slot %d/%d: inode %u, name \"%s\", namelen %u\n",
-				 __func__, block, slot, dirblock->slots-1,
-				 inodenum, nameptr, namelen);
-			if (!namelen)
-				continue;
-			/* found the next entry */
-			ctx->pos = (block << EFS_DIRBSIZE_BITS) | slot;
-
-			/* sanity check */
-			if (nameptr - (char *) dirblock + namelen > EFS_DIRBSIZE) {
-				pr_warn("directory entry %d exceeds directory block\n",
-					slot);
-				continue;
-			}
-
-			/* copy filename and data in dirslot */
-			if (!dir_emit(ctx, nameptr, namelen, inodenum, DT_UNKNOWN)) {
-				brelse(bh);
-				return 0;
-			}
-		}
-		brelse(bh);
-
-		slot = 0;
-		block++;
-	}
-	ctx->pos = (block << EFS_DIRBSIZE_BITS) | slot;
-	return 0;
-}
diff --git a/fs/efs/efs.h b/fs/efs/efs.h
deleted file mode 100644
index 918d2b9abb76..000000000000
--- a/fs/efs/efs.h
+++ /dev/null
@@ -1,144 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (c) 1999 Al Smith, <Al.Smith@aeschi.ch.eu.org>
- *
- * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
- * Portions derived from IRIX header files (c) 1988 Silicon Graphics
- */
-#ifndef _EFS_EFS_H_
-#define _EFS_EFS_H_
-
-#ifdef pr_fmt
-#undef pr_fmt
-#endif
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/fs.h>
-#include <linux/uaccess.h>
-
-#define EFS_VERSION "1.0a"
-
-/* 1 block is 512 bytes */
-#define	EFS_BLOCKSIZE_BITS	9
-#define	EFS_BLOCKSIZE		(1 << EFS_BLOCKSIZE_BITS)
-
-typedef	int32_t		efs_block_t;
-typedef uint32_t	efs_ino_t;
-
-#define	EFS_DIRECTEXTENTS	12
-
-/*
- * layout of an extent, in memory and on disk. 8 bytes exactly.
- */
-typedef union extent_u {
-	unsigned char raw[8];
-	struct extent_s {
-		unsigned int	ex_magic:8;	/* magic # (zero) */
-		unsigned int	ex_bn:24;	/* basic block */
-		unsigned int	ex_length:8;	/* numblocks in this extent */
-		unsigned int	ex_offset:24;	/* logical offset into file */
-	} cooked;
-} efs_extent;
-
-typedef struct edevs {
-	__be16		odev;
-	__be32		ndev;
-} efs_devs;
-
-/*
- * extent based filesystem inode as it appears on disk.  The efs inode
- * is exactly 128 bytes long.
- */
-struct	efs_dinode {
-	__be16		di_mode;	/* mode and type of file */
-	__be16		di_nlink;	/* number of links to file */
-	__be16		di_uid;		/* owner's user id */
-	__be16		di_gid;		/* owner's group id */
-	__be32		di_size;	/* number of bytes in file */
-	__be32		di_atime;	/* time last accessed */
-	__be32		di_mtime;	/* time last modified */
-	__be32		di_ctime;	/* time created */
-	__be32		di_gen;		/* generation number */
-	__be16		di_numextents;	/* # of extents */
-	u_char		di_version;	/* version of inode */
-	u_char		di_spare;	/* spare - used by AFS */
-	union di_addr {
-		efs_extent	di_extents[EFS_DIRECTEXTENTS];
-		efs_devs	di_dev;	/* device for IFCHR/IFBLK */
-	} di_u;
-};
-
-/* efs inode storage in memory */
-struct efs_inode_info {
-	int		numextents;
-	int		lastextent;
-
-	efs_extent	extents[EFS_DIRECTEXTENTS];
-	struct inode	vfs_inode;
-};
-
-#include <linux/efs_fs_sb.h>
-
-#define EFS_DIRBSIZE_BITS	EFS_BLOCKSIZE_BITS
-#define EFS_DIRBSIZE		(1 << EFS_DIRBSIZE_BITS)
-
-struct efs_dentry {
-	__be32		inode;
-	unsigned char	namelen;
-	char		name[3];
-};
-
-#define EFS_DENTSIZE	(sizeof(struct efs_dentry) - 3 + 1)
-#define EFS_MAXNAMELEN  ((1 << (sizeof(char) * 8)) - 1)
-
-#define EFS_DIRBLK_HEADERSIZE	4
-#define EFS_DIRBLK_MAGIC	0xbeef	/* moo */
-
-struct efs_dir {
-	__be16	magic;
-	unsigned char	firstused;
-	unsigned char	slots;
-
-	unsigned char	space[EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE];
-};
-
-#define EFS_MAXENTS \
-	((EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE) / \
-	 (EFS_DENTSIZE + sizeof(char)))
-
-#define EFS_SLOTAT(dir, slot) EFS_REALOFF((dir)->space[slot])
-
-#define EFS_REALOFF(offset) ((offset << 1))
-
-
-static inline struct efs_inode_info *INODE_INFO(struct inode *inode)
-{
-	return container_of(inode, struct efs_inode_info, vfs_inode);
-}
-
-static inline struct efs_sb_info *SUPER_INFO(struct super_block *sb)
-{
-	return sb->s_fs_info;
-}
-
-struct statfs;
-struct fid;
-
-extern const struct inode_operations efs_dir_inode_operations;
-extern const struct file_operations efs_dir_operations;
-extern const struct address_space_operations efs_symlink_aops;
-
-extern struct inode *efs_iget(struct super_block *, unsigned long);
-extern efs_block_t efs_map_block(struct inode *, efs_block_t);
-extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);
-
-extern struct dentry *efs_lookup(struct inode *, struct dentry *, unsigned int);
-extern struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
-		int fh_len, int fh_type);
-extern struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
-		int fh_len, int fh_type);
-extern struct dentry *efs_get_parent(struct dentry *);
-extern int efs_bmap(struct inode *, int);
-
-#endif /* _EFS_EFS_H_ */
diff --git a/fs/efs/file.c b/fs/efs/file.c
deleted file mode 100644
index 9e641da6fab2..000000000000
--- a/fs/efs/file.c
+++ /dev/null
@@ -1,57 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * file.c
- *
- * Copyright (c) 1999 Al Smith
- *
- * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
- */
-
-#include <linux/buffer_head.h>
-#include "efs.h"
-
-int efs_get_block(struct inode *inode, sector_t iblock,
-		  struct buffer_head *bh_result, int create)
-{
-	int error = -EROFS;
-	long phys;
-
-	if (create)
-		return error;
-	if (iblock >= inode->i_blocks) {
-#ifdef DEBUG
-		/*
-		 * i have no idea why this happens as often as it does
-		 */
-		pr_warn("%s(): block %d >= %ld (filesize %ld)\n",
-			__func__, block, inode->i_blocks, inode->i_size);
-#endif
-		return 0;
-	}
-	phys = efs_map_block(inode, iblock);
-	if (phys)
-		map_bh(bh_result, inode->i_sb, phys);
-	return 0;
-}
-
-int efs_bmap(struct inode *inode, efs_block_t block) {
-
-	if (block < 0) {
-		pr_warn("%s(): block < 0\n", __func__);
-		return 0;
-	}
-
-	/* are we about to read past the end of a file ? */
-	if (!(block < inode->i_blocks)) {
-#ifdef DEBUG
-		/*
-		 * i have no idea why this happens as often as it does
-		 */
-		pr_warn("%s(): block %d >= %ld (filesize %ld)\n",
-			__func__, block, inode->i_blocks, inode->i_size);
-#endif
-		return 0;
-	}
-
-	return efs_map_block(inode, block);
-}
diff --git a/fs/efs/inode.c b/fs/efs/inode.c
deleted file mode 100644
index 4b132729e638..000000000000
--- a/fs/efs/inode.c
+++ /dev/null
@@ -1,315 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * inode.c
- *
- * Copyright (c) 1999 Al Smith
- *
- * Portions derived from work (c) 1995,1996 Christian Vogelgsang,
- *              and from work (c) 1998 Mike Shaver.
- */
-
-#include <linux/buffer_head.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include "efs.h"
-#include <linux/efs_fs_sb.h>
-
-static int efs_read_folio(struct file *file, struct folio *folio)
-{
-	return block_read_full_folio(folio, efs_get_block);
-}
-
-static sector_t _efs_bmap(struct address_space *mapping, sector_t block)
-{
-	return generic_block_bmap(mapping,block,efs_get_block);
-}
-
-static const struct address_space_operations efs_aops = {
-	.read_folio = efs_read_folio,
-	.bmap = _efs_bmap
-};
-
-static inline void extent_copy(efs_extent *src, efs_extent *dst) {
-	/*
-	 * this is slightly evil. it doesn't just copy
-	 * efs_extent from src to dst, it also mangles
-	 * the bits so that dst ends up in cpu byte-order.
-	 */
-
-	dst->cooked.ex_magic  =  (unsigned int) src->raw[0];
-	dst->cooked.ex_bn     = ((unsigned int) src->raw[1] << 16) |
-				((unsigned int) src->raw[2] <<  8) |
-				((unsigned int) src->raw[3] <<  0);
-	dst->cooked.ex_length =  (unsigned int) src->raw[4];
-	dst->cooked.ex_offset = ((unsigned int) src->raw[5] << 16) |
-				((unsigned int) src->raw[6] <<  8) |
-				((unsigned int) src->raw[7] <<  0);
-	return;
-}
-
-struct inode *efs_iget(struct super_block *super, unsigned long ino)
-{
-	int i, inode_index;
-	dev_t device;
-	u32 rdev;
-	struct buffer_head *bh;
-	struct efs_sb_info    *sb = SUPER_INFO(super);
-	struct efs_inode_info *in;
-	efs_block_t block, offset;
-	struct efs_dinode *efs_inode;
-	struct inode *inode;
-
-	inode = iget_locked(super, ino);
-	if (!inode)
-		return ERR_PTR(-ENOMEM);
-	if (!(inode_state_read_once(inode) & I_NEW))
-		return inode;
-
-	in = INODE_INFO(inode);
-
-	/*
-	** EFS layout:
-	**
-	** |   cylinder group    |   cylinder group    |   cylinder group ..etc
-	** |inodes|data          |inodes|data          |inodes|data       ..etc
-	**
-	** work out the inode block index, (considering initially that the
-	** inodes are stored as consecutive blocks). then work out the block
-	** number of that inode given the above layout, and finally the
-	** offset of the inode within that block.
-	*/
-
-	inode_index = inode->i_ino /
-		(EFS_BLOCKSIZE / sizeof(struct efs_dinode));
-
-	block = sb->fs_start + sb->first_block + 
-		(sb->group_size * (inode_index / sb->inode_blocks)) +
-		(inode_index % sb->inode_blocks);
-
-	offset = (inode->i_ino %
-			(EFS_BLOCKSIZE / sizeof(struct efs_dinode))) *
-		sizeof(struct efs_dinode);
-
-	bh = sb_bread(inode->i_sb, block);
-	if (!bh) {
-		pr_warn("%s() failed at block %d\n", __func__, block);
-		goto read_inode_error;
-	}
-
-	efs_inode = (struct efs_dinode *) (bh->b_data + offset);
-    
-	inode->i_mode  = be16_to_cpu(efs_inode->di_mode);
-	set_nlink(inode, be16_to_cpu(efs_inode->di_nlink));
-	i_uid_write(inode, (uid_t)be16_to_cpu(efs_inode->di_uid));
-	i_gid_write(inode, (gid_t)be16_to_cpu(efs_inode->di_gid));
-	inode->i_size  = be32_to_cpu(efs_inode->di_size);
-	inode_set_atime(inode, be32_to_cpu(efs_inode->di_atime), 0);
-	inode_set_mtime(inode, be32_to_cpu(efs_inode->di_mtime), 0);
-	inode_set_ctime(inode, be32_to_cpu(efs_inode->di_ctime), 0);
-
-	/* this is the number of blocks in the file */
-	if (inode->i_size == 0) {
-		inode->i_blocks = 0;
-	} else {
-		inode->i_blocks = ((inode->i_size - 1) >> EFS_BLOCKSIZE_BITS) + 1;
-	}
-
-	rdev = be16_to_cpu(efs_inode->di_u.di_dev.odev);
-	if (rdev == 0xffff) {
-		rdev = be32_to_cpu(efs_inode->di_u.di_dev.ndev);
-		if (sysv_major(rdev) > 0xfff)
-			device = 0;
-		else
-			device = MKDEV(sysv_major(rdev), sysv_minor(rdev));
-	} else
-		device = old_decode_dev(rdev);
-
-	/* get the number of extents for this object */
-	in->numextents = be16_to_cpu(efs_inode->di_numextents);
-	in->lastextent = 0;
-
-	/* copy the extents contained within the inode to memory */
-	for(i = 0; i < EFS_DIRECTEXTENTS; i++) {
-		extent_copy(&(efs_inode->di_u.di_extents[i]), &(in->extents[i]));
-		if (i < in->numextents && in->extents[i].cooked.ex_magic != 0) {
-			pr_warn("extent %d has bad magic number in inode %llu\n",
-				i, inode->i_ino);
-			brelse(bh);
-			goto read_inode_error;
-		}
-	}
-
-	brelse(bh);
-	pr_debug("efs_iget(): inode %llu, extents %d, mode %o\n",
-		 inode->i_ino, in->numextents, inode->i_mode);
-	switch (inode->i_mode & S_IFMT) {
-		case S_IFDIR: 
-			inode->i_op = &efs_dir_inode_operations; 
-			inode->i_fop = &efs_dir_operations; 
-			break;
-		case S_IFREG:
-			inode->i_fop = &generic_ro_fops;
-			inode->i_data.a_ops = &efs_aops;
-			break;
-		case S_IFLNK:
-			inode->i_op = &page_symlink_inode_operations;
-			inode_nohighmem(inode);
-			inode->i_data.a_ops = &efs_symlink_aops;
-			break;
-		case S_IFCHR:
-		case S_IFBLK:
-		case S_IFIFO:
-			init_special_inode(inode, inode->i_mode, device);
-			break;
-		default:
-			pr_warn("unsupported inode mode %o\n", inode->i_mode);
-			goto read_inode_error;
-			break;
-	}
-
-	unlock_new_inode(inode);
-	return inode;
-        
-read_inode_error:
-	pr_warn("failed to read inode %llu\n", inode->i_ino);
-	iget_failed(inode);
-	return ERR_PTR(-EIO);
-}
-
-static inline efs_block_t
-efs_extent_check(efs_extent *ptr, efs_block_t block, struct efs_sb_info *sb) {
-	efs_block_t start;
-	efs_block_t length;
-	efs_block_t offset;
-
-	/*
-	 * given an extent and a logical block within a file,
-	 * can this block be found within this extent ?
-	 */
-	start  = ptr->cooked.ex_bn;
-	length = ptr->cooked.ex_length;
-	offset = ptr->cooked.ex_offset;
-
-	if ((block >= offset) && (block < offset+length)) {
-		return(sb->fs_start + start + block - offset);
-	} else {
-		return 0;
-	}
-}
-
-efs_block_t efs_map_block(struct inode *inode, efs_block_t block) {
-	struct efs_sb_info    *sb = SUPER_INFO(inode->i_sb);
-	struct efs_inode_info *in = INODE_INFO(inode);
-	struct buffer_head    *bh = NULL;
-
-	int cur, last, first = 1;
-	int ibase, ioffset, dirext, direxts, indext, indexts;
-	efs_block_t iblock, result = 0, lastblock = 0;
-	efs_extent ext, *exts;
-
-	last = in->lastextent;
-
-	if (in->numextents <= EFS_DIRECTEXTENTS) {
-		/* first check the last extent we returned */
-		if ((result = efs_extent_check(&in->extents[last], block, sb)))
-			return result;
-    
-		/* if we only have one extent then nothing can be found */
-		if (in->numextents == 1) {
-			pr_err("%s() failed to map (1 extent)\n", __func__);
-			return 0;
-		}
-
-		direxts = in->numextents;
-
-		/*
-		 * check the stored extents in the inode
-		 * start with next extent and check forwards
-		 */
-		for(dirext = 1; dirext < direxts; dirext++) {
-			cur = (last + dirext) % in->numextents;
-			if ((result = efs_extent_check(&in->extents[cur], block, sb))) {
-				in->lastextent = cur;
-				return result;
-			}
-		}
-
-		pr_err("%s() failed to map block %u (dir)\n", __func__, block);
-		return 0;
-	}
-
-	pr_debug("%s(): indirect search for logical block %u\n",
-		 __func__, block);
-	direxts = in->extents[0].cooked.ex_offset;
-	indexts = in->numextents;
-
-	for(indext = 0; indext < indexts; indext++) {
-		cur = (last + indext) % indexts;
-
-		/*
-		 * work out which direct extent contains `cur'.
-		 *
-		 * also compute ibase: i.e. the number of the first
-		 * indirect extent contained within direct extent `cur'.
-		 *
-		 */
-		ibase = 0;
-		for(dirext = 0; cur < ibase && dirext < direxts; dirext++) {
-			ibase += in->extents[dirext].cooked.ex_length *
-				(EFS_BLOCKSIZE / sizeof(efs_extent));
-		}
-
-		if (dirext == direxts) {
-			/* should never happen */
-			pr_err("couldn't find direct extent for indirect extent %d (block %u)\n",
-			       cur, block);
-			if (bh) brelse(bh);
-			return 0;
-		}
-		
-		/* work out block number and offset of this indirect extent */
-		iblock = sb->fs_start + in->extents[dirext].cooked.ex_bn +
-			(cur - ibase) /
-			(EFS_BLOCKSIZE / sizeof(efs_extent));
-		ioffset = (cur - ibase) %
-			(EFS_BLOCKSIZE / sizeof(efs_extent));
-
-		if (first || lastblock != iblock) {
-			if (bh) brelse(bh);
-
-			bh = sb_bread(inode->i_sb, iblock);
-			if (!bh) {
-				pr_err("%s() failed at block %d\n",
-				       __func__, iblock);
-				return 0;
-			}
-			pr_debug("%s(): read indirect extent block %d\n",
-				 __func__, iblock);
-			first = 0;
-			lastblock = iblock;
-		}
-
-		exts = (efs_extent *) bh->b_data;
-
-		extent_copy(&(exts[ioffset]), &ext);
-
-		if (ext.cooked.ex_magic != 0) {
-			pr_err("extent %d has bad magic number in block %d\n",
-			       cur, iblock);
-			if (bh) brelse(bh);
-			return 0;
-		}
-
-		if ((result = efs_extent_check(&ext, block, sb))) {
-			if (bh) brelse(bh);
-			in->lastextent = cur;
-			return result;
-		}
-	}
-	if (bh) brelse(bh);
-	pr_err("%s() failed to map block %u (indir)\n", __func__, block);
-	return 0;
-}  
-
-MODULE_DESCRIPTION("Extent File System (efs)");
-MODULE_LICENSE("GPL");
diff --git a/fs/efs/namei.c b/fs/efs/namei.c
deleted file mode 100644
index 38961ee1d1af..000000000000
--- a/fs/efs/namei.c
+++ /dev/null
@@ -1,120 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * namei.c
- *
- * Copyright (c) 1999 Al Smith
- *
- * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
- */
-
-#include <linux/buffer_head.h>
-#include <linux/string.h>
-#include <linux/exportfs.h>
-#include "efs.h"
-
-
-static efs_ino_t efs_find_entry(struct inode *inode, const char *name, int len)
-{
-	struct buffer_head *bh;
-
-	int			slot, namelen;
-	char			*nameptr;
-	struct efs_dir		*dirblock;
-	struct efs_dentry	*dirslot;
-	efs_ino_t		inodenum;
-	efs_block_t		block;
- 
-	if (inode->i_size & (EFS_DIRBSIZE-1))
-		pr_warn("%s(): directory size not a multiple of EFS_DIRBSIZE\n",
-			__func__);
-
-	for(block = 0; block < inode->i_blocks; block++) {
-
-		bh = sb_bread(inode->i_sb, efs_bmap(inode, block));
-		if (!bh) {
-			pr_err("%s(): failed to read dir block %d\n",
-			       __func__, block);
-			return 0;
-		}
-    
-		dirblock = (struct efs_dir *) bh->b_data;
-
-		if (be16_to_cpu(dirblock->magic) != EFS_DIRBLK_MAGIC) {
-			pr_err("%s(): invalid directory block\n", __func__);
-			brelse(bh);
-			return 0;
-		}
-
-		for (slot = 0; slot < dirblock->slots; slot++) {
-			dirslot  = (struct efs_dentry *) (((char *) bh->b_data) + EFS_SLOTAT(dirblock, slot));
-
-			namelen  = dirslot->namelen;
-			nameptr  = dirslot->name;
-
-			if ((namelen == len) && (!memcmp(name, nameptr, len))) {
-				inodenum = be32_to_cpu(dirslot->inode);
-				brelse(bh);
-				return inodenum;
-			}
-		}
-		brelse(bh);
-	}
-	return 0;
-}
-
-struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
-{
-	efs_ino_t inodenum;
-	struct inode *inode = NULL;
-
-	inodenum = efs_find_entry(dir, dentry->d_name.name, dentry->d_name.len);
-	if (inodenum)
-		inode = efs_iget(dir->i_sb, inodenum);
-
-	return d_splice_alias(inode, dentry);
-}
-
-static struct inode *efs_nfs_get_inode(struct super_block *sb, u64 ino,
-		u32 generation)
-{
-	struct inode *inode;
-
-	if (ino == 0)
-		return ERR_PTR(-ESTALE);
-	inode = efs_iget(sb, ino);
-	if (IS_ERR(inode))
-		return ERR_CAST(inode);
-
-	if (generation && inode->i_generation != generation) {
-		iput(inode);
-		return ERR_PTR(-ESTALE);
-	}
-
-	return inode;
-}
-
-struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
-		int fh_len, int fh_type)
-{
-	return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
-				    efs_nfs_get_inode);
-}
-
-struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
-		int fh_len, int fh_type)
-{
-	return generic_fh_to_parent(sb, fid, fh_len, fh_type,
-				    efs_nfs_get_inode);
-}
-
-struct dentry *efs_get_parent(struct dentry *child)
-{
-	struct dentry *parent = ERR_PTR(-ENOENT);
-	efs_ino_t ino;
-
-	ino = efs_find_entry(d_inode(child), "..", 2);
-	if (ino)
-		parent = d_obtain_alias(efs_iget(child->d_sb, ino));
-
-	return parent;
-}
diff --git a/fs/efs/super.c b/fs/efs/super.c
deleted file mode 100644
index 11fea3bbce7c..000000000000
--- a/fs/efs/super.c
+++ /dev/null
@@ -1,368 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * super.c
- *
- * Copyright (c) 1999 Al Smith
- *
- * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/exportfs.h>
-#include <linux/slab.h>
-#include <linux/buffer_head.h>
-#include <linux/vfs.h>
-#include <linux/blkdev.h>
-#include <linux/fs_context.h>
-#include "efs.h"
-#include <linux/efs_vh.h>
-#include <linux/efs_fs_sb.h>
-
-static int efs_statfs(struct dentry *dentry, struct kstatfs *buf);
-static int efs_init_fs_context(struct fs_context *fc);
-
-static void efs_kill_sb(struct super_block *s)
-{
-	struct efs_sb_info *sbi = SUPER_INFO(s);
-	kill_block_super(s);
-	kfree(sbi);
-}
-
-static struct pt_types sgi_pt_types[] = {
-	{0x00,		"SGI vh"},
-	{0x01,		"SGI trkrepl"},
-	{0x02,		"SGI secrepl"},
-	{0x03,		"SGI raw"},
-	{0x04,		"SGI bsd"},
-	{SGI_SYSV,	"SGI sysv"},
-	{0x06,		"SGI vol"},
-	{SGI_EFS,	"SGI efs"},
-	{0x08,		"SGI lv"},
-	{0x09,		"SGI rlv"},
-	{0x0A,		"SGI xfs"},
-	{0x0B,		"SGI xfslog"},
-	{0x0C,		"SGI xlv"},
-	{0x82,		"Linux swap"},
-	{0x83,		"Linux native"},
-	{0,		NULL}
-};
-
-/*
- * File system definition and registration.
- */
-static struct file_system_type efs_fs_type = {
-	.owner			= THIS_MODULE,
-	.name			= "efs",
-	.kill_sb		= efs_kill_sb,
-	.fs_flags		= FS_REQUIRES_DEV,
-	.init_fs_context	= efs_init_fs_context,
-};
-MODULE_ALIAS_FS("efs");
-
-static struct kmem_cache * efs_inode_cachep;
-
-static struct inode *efs_alloc_inode(struct super_block *sb)
-{
-	struct efs_inode_info *ei;
-	ei = alloc_inode_sb(sb, efs_inode_cachep, GFP_KERNEL);
-	if (!ei)
-		return NULL;
-	return &ei->vfs_inode;
-}
-
-static void efs_free_inode(struct inode *inode)
-{
-	kmem_cache_free(efs_inode_cachep, INODE_INFO(inode));
-}
-
-static void init_once(void *foo)
-{
-	struct efs_inode_info *ei = (struct efs_inode_info *) foo;
-
-	inode_init_once(&ei->vfs_inode);
-}
-
-static int __init init_inodecache(void)
-{
-	efs_inode_cachep = kmem_cache_create("efs_inode_cache",
-				sizeof(struct efs_inode_info), 0,
-				SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT,
-				init_once);
-	if (efs_inode_cachep == NULL)
-		return -ENOMEM;
-	return 0;
-}
-
-static void destroy_inodecache(void)
-{
-	/*
-	 * Make sure all delayed rcu free inodes are flushed before we
-	 * destroy cache.
-	 */
-	rcu_barrier();
-	kmem_cache_destroy(efs_inode_cachep);
-}
-
-static const struct super_operations efs_superblock_operations = {
-	.alloc_inode	= efs_alloc_inode,
-	.free_inode	= efs_free_inode,
-	.statfs		= efs_statfs,
-};
-
-static const struct export_operations efs_export_ops = {
-	.encode_fh	= generic_encode_ino32_fh,
-	.fh_to_dentry	= efs_fh_to_dentry,
-	.fh_to_parent	= efs_fh_to_parent,
-	.get_parent	= efs_get_parent,
-};
-
-static int __init init_efs_fs(void) {
-	int err;
-	pr_info(EFS_VERSION" - http://aeschi.ch.eu.org/efs/\n");
-	err = init_inodecache();
-	if (err)
-		goto out1;
-	err = register_filesystem(&efs_fs_type);
-	if (err)
-		goto out;
-	return 0;
-out:
-	destroy_inodecache();
-out1:
-	return err;
-}
-
-static void __exit exit_efs_fs(void) {
-	unregister_filesystem(&efs_fs_type);
-	destroy_inodecache();
-}
-
-module_init(init_efs_fs)
-module_exit(exit_efs_fs)
-
-static efs_block_t efs_validate_vh(struct volume_header *vh) {
-	int		i;
-	__be32		cs, *ui;
-	int		csum;
-	efs_block_t	sblock = 0; /* shuts up gcc */
-	struct pt_types	*pt_entry;
-	int		pt_type, slice = -1;
-
-	if (be32_to_cpu(vh->vh_magic) != VHMAGIC) {
-		/*
-		 * assume that we're dealing with a partition and allow
-		 * read_super() to try and detect a valid superblock
-		 * on the next block.
-		 */
-		return 0;
-	}
-
-	ui = ((__be32 *) (vh + 1)) - 1;
-	for(csum = 0; ui >= ((__be32 *) vh);) {
-		cs = *ui--;
-		csum += be32_to_cpu(cs);
-	}
-	if (csum) {
-		pr_warn("SGI disklabel: checksum bad, label corrupted\n");
-		return 0;
-	}
-
-#ifdef DEBUG
-	pr_debug("bf: \"%16s\"\n", vh->vh_bootfile);
-
-	for(i = 0; i < NVDIR; i++) {
-		int	j;
-		char	name[VDNAMESIZE+1];
-
-		for(j = 0; j < VDNAMESIZE; j++) {
-			name[j] = vh->vh_vd[i].vd_name[j];
-		}
-		name[j] = (char) 0;
-
-		if (name[0]) {
-			pr_debug("vh: %8s block: 0x%08x size: 0x%08x\n",
-				name, (int) be32_to_cpu(vh->vh_vd[i].vd_lbn),
-				(int) be32_to_cpu(vh->vh_vd[i].vd_nbytes));
-		}
-	}
-#endif
-
-	for(i = 0; i < NPARTAB; i++) {
-		pt_type = (int) be32_to_cpu(vh->vh_pt[i].pt_type);
-		for(pt_entry = sgi_pt_types; pt_entry->pt_name; pt_entry++) {
-			if (pt_type == pt_entry->pt_type) break;
-		}
-#ifdef DEBUG
-		if (be32_to_cpu(vh->vh_pt[i].pt_nblks)) {
-			pr_debug("pt %2d: start: %08d size: %08d type: 0x%02x (%s)\n",
-				 i, (int)be32_to_cpu(vh->vh_pt[i].pt_firstlbn),
-				 (int)be32_to_cpu(vh->vh_pt[i].pt_nblks),
-				 pt_type, (pt_entry->pt_name) ?
-				 pt_entry->pt_name : "unknown");
-		}
-#endif
-		if (IS_EFS(pt_type)) {
-			sblock = be32_to_cpu(vh->vh_pt[i].pt_firstlbn);
-			slice = i;
-		}
-	}
-
-	if (slice == -1) {
-		pr_notice("partition table contained no EFS partitions\n");
-#ifdef DEBUG
-	} else {
-		pr_info("using slice %d (type %s, offset 0x%x)\n", slice,
-			(pt_entry->pt_name) ? pt_entry->pt_name : "unknown",
-			sblock);
-#endif
-	}
-	return sblock;
-}
-
-static int efs_validate_super(struct efs_sb_info *sb, struct efs_super *super) {
-
-	if (!IS_EFS_MAGIC(be32_to_cpu(super->fs_magic)))
-		return -1;
-
-	sb->fs_magic     = be32_to_cpu(super->fs_magic);
-	sb->total_blocks = be32_to_cpu(super->fs_size);
-	sb->first_block  = be32_to_cpu(super->fs_firstcg);
-	sb->group_size   = be32_to_cpu(super->fs_cgfsize);
-	sb->data_free    = be32_to_cpu(super->fs_tfree);
-	sb->inode_free   = be32_to_cpu(super->fs_tinode);
-	sb->inode_blocks = be16_to_cpu(super->fs_cgisize);
-	sb->total_groups = be16_to_cpu(super->fs_ncg);
-    
-	return 0;    
-}
-
-static int efs_fill_super(struct super_block *s, struct fs_context *fc)
-{
-	struct efs_sb_info *sb;
-	struct buffer_head *bh;
-	struct inode *root;
-
-	sb = kzalloc_obj(struct efs_sb_info);
-	if (!sb)
-		return -ENOMEM;
-	s->s_fs_info = sb;
-	s->s_time_min = 0;
-	s->s_time_max = U32_MAX;
-
-	s->s_magic		= EFS_SUPER_MAGIC;
-	if (!sb_set_blocksize(s, EFS_BLOCKSIZE)) {
-		pr_err("device does not support %d byte blocks\n",
-			EFS_BLOCKSIZE);
-		return invalf(fc, "device does not support %d byte blocks\n",
-			      EFS_BLOCKSIZE);
-	}
-
-	/* read the vh (volume header) block */
-	bh = sb_bread(s, 0);
-
-	if (!bh) {
-		pr_err("cannot read volume header\n");
-		return -EIO;
-	}
-
-	/*
-	 * if this returns zero then we didn't find any partition table.
-	 * this isn't (yet) an error - just assume for the moment that
-	 * the device is valid and go on to search for a superblock.
-	 */
-	sb->fs_start = efs_validate_vh((struct volume_header *) bh->b_data);
-	brelse(bh);
-
-	if (sb->fs_start == -1) {
-		return -EINVAL;
-	}
-
-	bh = sb_bread(s, sb->fs_start + EFS_SUPER);
-	if (!bh) {
-		pr_err("cannot read superblock\n");
-		return -EIO;
-	}
-
-	if (efs_validate_super(sb, (struct efs_super *) bh->b_data)) {
-#ifdef DEBUG
-		pr_warn("invalid superblock at block %u\n",
-			sb->fs_start + EFS_SUPER);
-#endif
-		brelse(bh);
-		return -EINVAL;
-	}
-	brelse(bh);
-
-	if (!sb_rdonly(s)) {
-#ifdef DEBUG
-		pr_info("forcing read-only mode\n");
-#endif
-		s->s_flags |= SB_RDONLY;
-	}
-	s->s_op   = &efs_superblock_operations;
-	s->s_export_op = &efs_export_ops;
-	root = efs_iget(s, EFS_ROOTINODE);
-	if (IS_ERR(root)) {
-		pr_err("get root inode failed\n");
-		return PTR_ERR(root);
-	}
-
-	s->s_root = d_make_root(root);
-	if (!(s->s_root)) {
-		pr_err("get root dentry failed\n");
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-static int efs_get_tree(struct fs_context *fc)
-{
-	return get_tree_bdev(fc, efs_fill_super);
-}
-
-static int efs_reconfigure(struct fs_context *fc)
-{
-	sync_filesystem(fc->root->d_sb);
-	fc->sb_flags |= SB_RDONLY;
-
-	return 0;
-}
-
-static const struct fs_context_operations efs_context_opts = {
-	.get_tree	= efs_get_tree,
-	.reconfigure	= efs_reconfigure,
-};
-
-/*
- * Set up the filesystem mount context.
- */
-static int efs_init_fs_context(struct fs_context *fc)
-{
-	fc->ops = &efs_context_opts;
-
-	return 0;
-}
-
-static int efs_statfs(struct dentry *dentry, struct kstatfs *buf) {
-	struct super_block *sb = dentry->d_sb;
-	struct efs_sb_info *sbi = SUPER_INFO(sb);
-	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
-
-	buf->f_type    = EFS_SUPER_MAGIC;	/* efs magic number */
-	buf->f_bsize   = EFS_BLOCKSIZE;		/* blocksize */
-	buf->f_blocks  = sbi->total_groups *	/* total data blocks */
-			(sbi->group_size - sbi->inode_blocks);
-	buf->f_bfree   = sbi->data_free;	/* free data blocks */
-	buf->f_bavail  = sbi->data_free;	/* free blocks for non-root */
-	buf->f_files   = sbi->total_groups *	/* total inodes */
-			sbi->inode_blocks *
-			(EFS_BLOCKSIZE / sizeof(struct efs_dinode));
-	buf->f_ffree   = sbi->inode_free;	/* free inodes */
-	buf->f_fsid    = u64_to_fsid(id);
-	buf->f_namelen = EFS_MAXNAMELEN;	/* max filename length */
-
-	return 0;
-}
-
diff --git a/fs/efs/symlink.c b/fs/efs/symlink.c
deleted file mode 100644
index 7749feded722..000000000000
--- a/fs/efs/symlink.c
+++ /dev/null
@@ -1,50 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * symlink.c
- *
- * Copyright (c) 1999 Al Smith
- *
- * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
- */
-
-#include <linux/string.h>
-#include <linux/pagemap.h>
-#include <linux/buffer_head.h>
-#include "efs.h"
-
-static int efs_symlink_read_folio(struct file *file, struct folio *folio)
-{
-	char *link = folio_address(folio);
-	struct buffer_head *bh;
-	struct inode *inode = folio->mapping->host;
-	efs_block_t size = inode->i_size;
-	int err;
-  
-	err = -ENAMETOOLONG;
-	if (size > 2 * EFS_BLOCKSIZE)
-		goto fail;
-  
-	/* read first 512 bytes of link target */
-	err = -EIO;
-	bh = sb_bread(inode->i_sb, efs_bmap(inode, 0));
-	if (!bh)
-		goto fail;
-	memcpy(link, bh->b_data, (size > EFS_BLOCKSIZE) ? EFS_BLOCKSIZE : size);
-	brelse(bh);
-	if (size > EFS_BLOCKSIZE) {
-		bh = sb_bread(inode->i_sb, efs_bmap(inode, 1));
-		if (!bh)
-			goto fail;
-		memcpy(link + EFS_BLOCKSIZE, bh->b_data, size - EFS_BLOCKSIZE);
-		brelse(bh);
-	}
-	link[size] = '\0';
-	err = 0;
-fail:
-	folio_end_read(folio, err == 0);
-	return err;
-}
-
-const struct address_space_operations efs_symlink_aops = {
-	.read_folio	= efs_symlink_read_folio
-};
diff --git a/include/linux/efs_vh.h b/include/linux/efs_vh.h
deleted file mode 100644
index 206c5270f7b8..000000000000
--- a/include/linux/efs_vh.h
+++ /dev/null
@@ -1,54 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * efs_vh.h
- *
- * Copyright (c) 1999 Al Smith
- *
- * Portions derived from IRIX header files (c) 1985 MIPS Computer Systems, Inc.
- */
-
-#ifndef __EFS_VH_H__
-#define __EFS_VH_H__
-
-#define VHMAGIC		0xbe5a941	/* volume header magic number */
-#define NPARTAB		16		/* 16 unix partitions */
-#define NVDIR		15		/* max of 15 directory entries */
-#define BFNAMESIZE	16		/* max 16 chars in boot file name */
-#define VDNAMESIZE	8
-
-struct volume_directory {
-	char	vd_name[VDNAMESIZE];	/* name */
-	__be32	vd_lbn;			/* logical block number */
-	__be32	vd_nbytes;		/* file length in bytes */
-};
-
-struct partition_table {	/* one per logical partition */
-	__be32	pt_nblks;	/* # of logical blks in partition */
-	__be32	pt_firstlbn;	/* first lbn of partition */
-	__be32	pt_type;	/* use of partition */
-};
-
-struct volume_header {
-	__be32	vh_magic;			/* identifies volume header */
-	__be16	vh_rootpt;			/* root partition number */
-	__be16	vh_swappt;			/* swap partition number */
-	char	vh_bootfile[BFNAMESIZE];	/* name of file to boot */
-	char	pad[48];			/* device param space */
-	struct volume_directory vh_vd[NVDIR];	/* other vol hdr contents */
-	struct partition_table  vh_pt[NPARTAB];	/* device partition layout */
-	__be32	vh_csum;			/* volume header checksum */
-	__be32	vh_fill;			/* fill out to 512 bytes */
-};
-
-/* partition type sysv is used for EFS format CD-ROM partitions */
-#define SGI_SYSV	0x05
-#define SGI_EFS		0x07
-#define IS_EFS(x)	(((x) == SGI_EFS) || ((x) == SGI_SYSV))
-
-struct pt_types {
-	int	pt_type;
-	char	*pt_name;
-};
-
-#endif /* __EFS_VH_H__ */
-
diff --git a/include/uapi/linux/efs_fs_sb.h b/include/uapi/linux/efs_fs_sb.h
deleted file mode 100644
index 6bad29a10faa..000000000000
--- a/include/uapi/linux/efs_fs_sb.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * efs_fs_sb.h
- *
- * Copyright (c) 1999 Al Smith
- *
- * Portions derived from IRIX header files (c) 1988 Silicon Graphics
- */
-
-#ifndef __EFS_FS_SB_H__
-#define __EFS_FS_SB_H__
-
-#include <linux/types.h>
-#include <linux/magic.h>
-
-/* EFS superblock magic numbers */
-#define EFS_MAGIC	0x072959
-#define EFS_NEWMAGIC	0x07295a
-
-#define IS_EFS_MAGIC(x)	((x == EFS_MAGIC) || (x == EFS_NEWMAGIC))
-
-#define EFS_SUPER		1
-#define EFS_ROOTINODE		2
-
-/* efs superblock on disk */
-struct efs_super {
-	__be32		fs_size;        /* size of filesystem, in sectors */
-	__be32		fs_firstcg;     /* bb offset to first cg */
-	__be32		fs_cgfsize;     /* size of cylinder group in bb's */
-	__be16		fs_cgisize;     /* bb's of inodes per cylinder group */
-	__be16		fs_sectors;     /* sectors per track */
-	__be16		fs_heads;       /* heads per cylinder */
-	__be16		fs_ncg;         /* # of cylinder groups in filesystem */
-	__be16		fs_dirty;       /* fs needs to be fsck'd */
-	__be32		fs_time;        /* last super-block update */
-	__be32		fs_magic;       /* magic number */
-	char		fs_fname[6];    /* file system name */
-	char		fs_fpack[6];    /* file system pack name */
-	__be32		fs_bmsize;      /* size of bitmap in bytes */
-	__be32		fs_tfree;       /* total free data blocks */
-	__be32		fs_tinode;      /* total free inodes */
-	__be32		fs_bmblock;     /* bitmap location. */
-	__be32		fs_replsb;      /* Location of replicated superblock. */
-	__be32		fs_lastialloc;  /* last allocated inode */
-	char		fs_spare[20];   /* space for expansion - MUST BE ZERO */
-	__be32		fs_checksum;    /* checksum of volume portion of fs */
-};
-
-/* efs superblock information in memory */
-struct efs_sb_info {
-	__u32	fs_magic;	/* superblock magic number */
-	__u32	fs_start;	/* first block of filesystem */
-	__u32	first_block;	/* first data block in filesystem */
-	__u32	total_blocks;	/* total number of blocks in filesystem */
-	__u32	group_size;	/* # of blocks a group consists of */ 
-	__u32	data_free;	/* # of free data blocks */
-	__u32	inode_free;	/* # of free inodes */
-	__u16	inode_blocks;	/* # of blocks used for inodes in every grp */
-	__u16	total_groups;	/* # of groups */
-};
-
-#endif /* __EFS_FS_SB_H__ */
-
-- 
2.47.3


^ permalink raw reply related	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2026-06-25 19:42 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-06-18 21:18 [PATCH] efs: Remove EFS Matthew Wilcox (Oracle)
2026-06-19  9:28 ` Jori Koolstra
2026-06-19 10:06   ` Pedro Falcato
2026-06-19 10:19     ` Jori Koolstra
2026-06-21 21:44       ` Matthew Wilcox
2026-06-23  9:17         ` Jori Koolstra
2026-06-25 19:42 ` Darrick J. Wong

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