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
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"
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-$(CONFIG_AFFS_FS) += affs/
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-config EFS_FS
- tristate "EFS file system support (read only)"
- depends on BLOCK
- select BUFFER_HEAD
- help
- EFS is an older file system used for non-ISO9660 CD-ROMs and hard
- disk partitions by SGI's IRIX operating system (IRIX 6.0 and newer
- uses the XFS file system for hard disk partitions however).
-
- This implementation only offers read-only access. If you don't know
- what all this is about, it's safe to say N. For more information
- about EFS see its home page at <http://aeschi.ch.eu.org/efs/>.
-
- To compile the EFS file system support as a module, choose M here: the
- module will be called efs.
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for the linux efs-filesystem routines.
-#
-
-obj-$(CONFIG_EFS_FS) += efs.o
-
-efs-objs := super.o inode.o namei.o dir.o file.o symlink.o
+++ /dev/null
-// 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;
-}
+++ /dev/null
-/* 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_ */
+++ /dev/null
-// 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)
- 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))
- return 0;
-
- return efs_map_block(inode, block);
-}
+++ /dev/null
-// 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");
+++ /dev/null
-// 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;
-}
+++ /dev/null
-// 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;
-}
-
+++ /dev/null
-// 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
-};
+++ /dev/null
-/* 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__ */
-
+++ /dev/null
-/* 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__ */
-
projects / thirdparty / linux.git / commitdiff
