diff --git a/CREDITS b/CREDITS index a0bd941ca5dd..8bdfde15e2ac 100644 --- a/CREDITS +++ b/CREDITS @@ -57,7 +57,7 @@ S: Longford, Ireland S: Sydney, Australia N: Tigran A. Aivazian -E: tigran@aivazian.fsnet.co.uk +E: aivazian.tigran@gmail.com W: http://www.moses.uklinux.net/patches D: BFS filesystem D: Intel IA32 CPU microcode update support diff --git a/Documentation/filesystems/befs.rst b/Documentation/filesystems/befs.rst index a22f603b2938..c1dbfe9c95d2 100644 --- a/Documentation/filesystems/befs.rst +++ b/Documentation/filesystems/befs.rst @@ -44,8 +44,8 @@ implementation. Which is it, BFS or BEFS? ========================= Be, Inc said, "BeOS Filesystem is officially called BFS, not BeFS". -But Unixware Boot Filesystem is called bfs, too. And they are already in -the kernel. Because of this naming conflict, on Linux the BeOS +But the UnixWare Boot Filesystem is called bfs, too, and it was already +in the kernel. Because of this naming conflict, on Linux the BeOS filesystem is called befs. How to Install diff --git a/Documentation/filesystems/bfs.rst b/Documentation/filesystems/bfs.rst deleted file mode 100644 index ce14b9018807..000000000000 --- a/Documentation/filesystems/bfs.rst +++ /dev/null @@ -1,60 +0,0 @@ -.. SPDX-License-Identifier: GPL-2.0 - -======================== -BFS Filesystem for Linux -======================== - -The BFS filesystem is used by SCO UnixWare OS for the /stand slice, which -usually contains the kernel image and a few other files required for the -boot process. - -In order to access /stand partition under Linux you obviously need to -know the partition number and the kernel must support UnixWare disk slices -(CONFIG_UNIXWARE_DISKLABEL config option). However BFS support does not -depend on having UnixWare disklabel support because one can also mount -BFS filesystem via loopback:: - - # losetup /dev/loop0 stand.img - # mount -t bfs /dev/loop0 /mnt/stand - -where stand.img is a file containing the image of BFS filesystem. -When you have finished using it and umounted you need to also deallocate -/dev/loop0 device by:: - - # losetup -d /dev/loop0 - -You can simplify mounting by just typing:: - - # mount -t bfs -o loop stand.img /mnt/stand - -this will allocate the first available loopback device (and load loop.o -kernel module if necessary) automatically. If the loopback driver is not -loaded automatically, make sure that you have compiled the module and -that modprobe is functioning. Beware that umount will not deallocate -/dev/loopN device if /etc/mtab file on your system is a symbolic link to -/proc/mounts. You will need to do it manually using "-d" switch of -losetup(8). Read losetup(8) manpage for more info. - -To create the BFS image under UnixWare you need to find out first which -slice contains it. The command prtvtoc(1M) is your friend:: - - # prtvtoc /dev/rdsk/c0b0t0d0s0 - -(assuming your root disk is on target=0, lun=0, bus=0, controller=0). Then you -look for the slice with tag "STAND", which is usually slice 10. With this -information you can use dd(1) to create the BFS image:: - - # umount /stand - # dd if=/dev/rdsk/c0b0t0d0sa of=stand.img bs=512 - -Just in case, you can verify that you have done the right thing by checking -the magic number:: - - # od -Ad -tx4 stand.img | more - -The first 4 bytes should be 0x1badface. - -If you have any patches, questions or suggestions regarding this BFS -implementation please contact the author: - -Tigran Aivazian diff --git a/Documentation/filesystems/index.rst b/Documentation/filesystems/index.rst index 734a45e51667..7cce7cc28d12 100644 --- a/Documentation/filesystems/index.rst +++ b/Documentation/filesystems/index.rst @@ -75,7 +75,6 @@ Documentation for filesystem implementations. autofs autofs-mount-control befs - bfs btrfs ceph coda diff --git a/MAINTAINERS b/MAINTAINERS index 782389bd5cd3..9545555f2ca5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4627,13 +4627,6 @@ S: Odd Fixes F: Documentation/block/bfq-iosched.rst F: block/bfq-* -BFS FILE SYSTEM -M: "Tigran A. Aivazian" -S: Maintained -F: Documentation/filesystems/bfs.rst -F: fs/bfs/ -F: include/uapi/linux/bfs_fs.h - BITMAP API M: Yury Norov R: Rasmus Villemoes diff --git a/arch/mips/configs/malta_defconfig b/arch/mips/configs/malta_defconfig index 56a8f76dab41..4fb4d45f3cdc 100644 --- a/arch/mips/configs/malta_defconfig +++ b/arch/mips/configs/malta_defconfig @@ -333,7 +333,6 @@ CONFIG_AFFS_FS=m CONFIG_HFS_FS=m CONFIG_HFSPLUS_FS=m CONFIG_BEFS_FS=m -CONFIG_BFS_FS=m CONFIG_EFS_FS=m CONFIG_JFFS2_FS=m CONFIG_JFFS2_FS_XATTR=y diff --git a/arch/mips/configs/malta_kvm_defconfig b/arch/mips/configs/malta_kvm_defconfig index 85e95c0ae410..3d1c32d3475e 100644 --- a/arch/mips/configs/malta_kvm_defconfig +++ b/arch/mips/configs/malta_kvm_defconfig @@ -340,7 +340,6 @@ CONFIG_AFFS_FS=m CONFIG_HFS_FS=m CONFIG_HFSPLUS_FS=m CONFIG_BEFS_FS=m -CONFIG_BFS_FS=m CONFIG_EFS_FS=m CONFIG_JFFS2_FS=m CONFIG_JFFS2_FS_XATTR=y diff --git a/arch/mips/configs/maltaup_xpa_defconfig b/arch/mips/configs/maltaup_xpa_defconfig index 0498a0115349..2545168b75bb 100644 --- a/arch/mips/configs/maltaup_xpa_defconfig +++ b/arch/mips/configs/maltaup_xpa_defconfig @@ -339,7 +339,6 @@ CONFIG_AFFS_FS=m CONFIG_HFS_FS=m CONFIG_HFSPLUS_FS=m CONFIG_BEFS_FS=m -CONFIG_BFS_FS=m CONFIG_EFS_FS=m CONFIG_JFFS2_FS=m CONFIG_JFFS2_FS_XATTR=y diff --git a/arch/mips/configs/rm200_defconfig b/arch/mips/configs/rm200_defconfig index 09e006c7cd7c..cd2a831614c8 100644 --- a/arch/mips/configs/rm200_defconfig +++ b/arch/mips/configs/rm200_defconfig @@ -318,7 +318,6 @@ CONFIG_ADFS_FS=m CONFIG_AFFS_FS=m CONFIG_HFS_FS=m CONFIG_BEFS_FS=m -CONFIG_BFS_FS=m CONFIG_EFS_FS=m CONFIG_CRAMFS=m CONFIG_VXFS_FS=m diff --git a/arch/powerpc/configs/fsl-emb-nonhw.config b/arch/powerpc/configs/fsl-emb-nonhw.config index 391c99117ee0..688051b11ce1 100644 --- a/arch/powerpc/configs/fsl-emb-nonhw.config +++ b/arch/powerpc/configs/fsl-emb-nonhw.config @@ -2,7 +2,6 @@ CONFIG_ADFS_FS=m CONFIG_AFFS_FS=m CONFIG_AUDIT=y CONFIG_BEFS_FS=m -CONFIG_BFS_FS=m CONFIG_BINFMT_MISC=m # CONFIG_BLK_DEV_BSG is not set CONFIG_BLK_DEV_INITRD=y diff --git a/arch/powerpc/configs/ppc6xx_defconfig b/arch/powerpc/configs/ppc6xx_defconfig index acffc5c17f92..8aab229fb909 100644 --- a/arch/powerpc/configs/ppc6xx_defconfig +++ b/arch/powerpc/configs/ppc6xx_defconfig @@ -945,7 +945,6 @@ CONFIG_ECRYPT_FS=m CONFIG_HFS_FS=m CONFIG_HFSPLUS_FS=m CONFIG_BEFS_FS=m -CONFIG_BFS_FS=m CONFIG_EFS_FS=m CONFIG_CRAMFS=m CONFIG_VXFS_FS=m diff --git a/fs/Kconfig b/fs/Kconfig index e05917adcd60..1cb0b3a8b12c 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -314,7 +314,6 @@ source "fs/ecryptfs/Kconfig" source "fs/hfs/Kconfig" source "fs/hfsplus/Kconfig" source "fs/befs/Kconfig" -source "fs/bfs/Kconfig" source "fs/jffs2/Kconfig" # UBIFS File system configuration source "fs/ubifs/Kconfig" diff --git a/fs/Makefile b/fs/Makefile index 055dfc23d82b..16f1108b64e1 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -76,7 +76,6 @@ obj-$(CONFIG_CODA_FS) += coda/ obj-$(CONFIG_MINIX_FS) += minix/ obj-$(CONFIG_FAT_FS) += fat/ obj-$(CONFIG_EXFAT_FS) += exfat/ -obj-$(CONFIG_BFS_FS) += bfs/ obj-$(CONFIG_ISO9660_FS) += isofs/ obj-$(CONFIG_HFSPLUS_FS) += hfsplus/ # Before hfs to find wrapped HFS+ obj-$(CONFIG_HFS_FS) += hfs/ diff --git a/fs/bfs/Kconfig b/fs/bfs/Kconfig deleted file mode 100644 index 8e7ef866b62a..000000000000 --- a/fs/bfs/Kconfig +++ /dev/null @@ -1,21 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0-only -config BFS_FS - tristate "BFS file system support" - depends on BLOCK - select BUFFER_HEAD - help - Boot File System (BFS) is a file system used under SCO UnixWare to - allow the bootloader access to the kernel image and other important - files during the boot process. It is usually mounted under /stand - and corresponds to the slice marked as "STAND" in the UnixWare - partition. You should say Y if you want to read or write the files - on your /stand slice from within Linux. You then also need to say Y - to "UnixWare slices support", below. More information about the BFS - file system is contained in the file - . - - If you don't know what this is about, say N. - - To compile this as a module, choose M here: the module will be called - bfs. Note that the file system of your root partition (the one - containing the directory /) cannot be compiled as a module. diff --git a/fs/bfs/Makefile b/fs/bfs/Makefile deleted file mode 100644 index 2b6bc5eb4de9..000000000000 --- a/fs/bfs/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0-only -# -# Makefile for BFS filesystem. -# - -obj-$(CONFIG_BFS_FS) += bfs.o - -bfs-objs := inode.o file.o dir.o diff --git a/fs/bfs/bfs.h b/fs/bfs/bfs.h deleted file mode 100644 index b08afe733e63..000000000000 --- a/fs/bfs/bfs.h +++ /dev/null @@ -1,69 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * fs/bfs/bfs.h - * Copyright (C) 1999-2018 Tigran Aivazian - */ -#ifndef _FS_BFS_BFS_H -#define _FS_BFS_BFS_H - -#include - -/* In theory BFS supports up to 512 inodes, numbered from 2 (for /) up to 513 inclusive. - In actual fact, attempting to create the 512th inode (i.e. inode No. 513 or file No. 511) - will fail with ENOSPC in bfs_add_entry(): the root directory cannot contain so many entries, counting '..'. - So, mkfs.bfs(8) should really limit its -N option to 511 and not 512. For now, we just print a warning - if a filesystem is mounted with such "impossible to fill up" number of inodes */ -#define BFS_MAX_LASTI 513 - -/* - * BFS file system in-core superblock info - */ -struct bfs_sb_info { - unsigned long si_blocks; - unsigned long si_freeb; - unsigned long si_freei; - unsigned long si_lf_eblk; - unsigned long si_lasti; - DECLARE_BITMAP(si_imap, BFS_MAX_LASTI+1); - struct mutex bfs_lock; -}; - -/* - * BFS file system in-core inode info - */ -struct bfs_inode_info { - unsigned long i_dsk_ino; /* inode number from the disk, can be 0 */ - unsigned long i_sblock; - unsigned long i_eblock; - struct mapping_metadata_bhs i_metadata_bhs; - struct inode vfs_inode; -}; - -static inline struct bfs_sb_info *BFS_SB(struct super_block *sb) -{ - return sb->s_fs_info; -} - -static inline struct bfs_inode_info *BFS_I(struct inode *inode) -{ - return container_of(inode, struct bfs_inode_info, vfs_inode); -} - - -#define printf(format, args...) \ - printk(KERN_ERR "BFS-fs: %s(): " format, __func__, ## args) - -/* inode.c */ -extern struct inode *bfs_iget(struct super_block *sb, unsigned long ino); -extern void bfs_dump_imap(const char *, struct super_block *); - -/* file.c */ -extern const struct inode_operations bfs_file_inops; -extern const struct file_operations bfs_file_operations; -extern const struct address_space_operations bfs_aops; - -/* dir.c */ -extern const struct inode_operations bfs_dir_inops; -extern const struct file_operations bfs_dir_operations; - -#endif /* _FS_BFS_BFS_H */ diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c deleted file mode 100644 index 91a4871fa051..000000000000 --- a/fs/bfs/dir.c +++ /dev/null @@ -1,356 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * fs/bfs/dir.c - * BFS directory operations. - * Copyright (C) 1999-2018 Tigran Aivazian - * Made endianness-clean by Andrew Stribblehill 2005 - */ - -#include -#include -#include -#include -#include -#include "bfs.h" - -#undef DEBUG - -#ifdef DEBUG -#define dprintf(x...) printf(x) -#else -#define dprintf(x...) -#endif - -static int bfs_add_entry(struct inode *dir, const struct qstr *child, int ino); -static struct buffer_head *bfs_find_entry(struct inode *dir, - const struct qstr *child, - struct bfs_dirent **res_dir); - -static int bfs_readdir(struct file *f, struct dir_context *ctx) -{ - struct inode *dir = file_inode(f); - struct buffer_head *bh; - struct bfs_dirent *de; - unsigned int offset; - int block; - - if (ctx->pos & (BFS_DIRENT_SIZE - 1)) { - printf("Bad f_pos=%08lx for %s:%08llx\n", - (unsigned long)ctx->pos, - dir->i_sb->s_id, dir->i_ino); - return -EINVAL; - } - - while (ctx->pos < dir->i_size) { - offset = ctx->pos & (BFS_BSIZE - 1); - block = BFS_I(dir)->i_sblock + (ctx->pos >> BFS_BSIZE_BITS); - bh = sb_bread(dir->i_sb, block); - if (!bh) { - ctx->pos += BFS_BSIZE - offset; - continue; - } - do { - de = (struct bfs_dirent *)(bh->b_data + offset); - if (de->ino) { - int size = strnlen(de->name, BFS_NAMELEN); - if (!dir_emit(ctx, de->name, size, - le16_to_cpu(de->ino), - DT_UNKNOWN)) { - brelse(bh); - return 0; - } - } - offset += BFS_DIRENT_SIZE; - ctx->pos += BFS_DIRENT_SIZE; - } while ((offset < BFS_BSIZE) && (ctx->pos < dir->i_size)); - brelse(bh); - } - return 0; -} - -const struct file_operations bfs_dir_operations = { - .read = generic_read_dir, - .iterate_shared = bfs_readdir, - .fsync = simple_fsync, - .llseek = generic_file_llseek, -}; - -static int bfs_create(struct mnt_idmap *idmap, struct inode *dir, - struct dentry *dentry, umode_t mode) -{ - int err; - struct inode *inode; - struct super_block *s = dir->i_sb; - struct bfs_sb_info *info = BFS_SB(s); - unsigned long ino; - - inode = new_inode(s); - if (!inode) - return -ENOMEM; - mutex_lock(&info->bfs_lock); - ino = find_first_zero_bit(info->si_imap, info->si_lasti + 1); - if (ino > info->si_lasti) { - mutex_unlock(&info->bfs_lock); - iput(inode); - return -ENOSPC; - } - set_bit(ino, info->si_imap); - info->si_freei--; - inode_init_owner(&nop_mnt_idmap, inode, dir, mode); - simple_inode_init_ts(inode); - inode->i_blocks = 0; - inode->i_op = &bfs_file_inops; - inode->i_fop = &bfs_file_operations; - inode->i_mapping->a_ops = &bfs_aops; - inode->i_ino = ino; - BFS_I(inode)->i_dsk_ino = ino; - BFS_I(inode)->i_sblock = 0; - BFS_I(inode)->i_eblock = 0; - insert_inode_hash(inode); - mark_inode_dirty(inode); - bfs_dump_imap("create", s); - - err = bfs_add_entry(dir, &dentry->d_name, inode->i_ino); - if (err) { - inode_dec_link_count(inode); - mutex_unlock(&info->bfs_lock); - iput(inode); - return err; - } - mutex_unlock(&info->bfs_lock); - d_instantiate(dentry, inode); - return 0; -} - -static struct dentry *bfs_lookup(struct inode *dir, struct dentry *dentry, - unsigned int flags) -{ - struct inode *inode = NULL; - struct buffer_head *bh; - struct bfs_dirent *de; - struct bfs_sb_info *info = BFS_SB(dir->i_sb); - - if (dentry->d_name.len > BFS_NAMELEN) - return ERR_PTR(-ENAMETOOLONG); - - mutex_lock(&info->bfs_lock); - bh = bfs_find_entry(dir, &dentry->d_name, &de); - if (bh) { - unsigned long ino = (unsigned long)le16_to_cpu(de->ino); - brelse(bh); - inode = bfs_iget(dir->i_sb, ino); - } - mutex_unlock(&info->bfs_lock); - return d_splice_alias(inode, dentry); -} - -static int bfs_link(struct dentry *old, struct inode *dir, - struct dentry *new) -{ - struct inode *inode = d_inode(old); - struct bfs_sb_info *info = BFS_SB(inode->i_sb); - int err; - - mutex_lock(&info->bfs_lock); - err = bfs_add_entry(dir, &new->d_name, inode->i_ino); - if (err) { - mutex_unlock(&info->bfs_lock); - return err; - } - inc_nlink(inode); - inode_set_ctime_current(inode); - mark_inode_dirty(inode); - ihold(inode); - d_instantiate(new, inode); - mutex_unlock(&info->bfs_lock); - return 0; -} - -static int bfs_unlink(struct inode *dir, struct dentry *dentry) -{ - int error = -ENOENT; - struct inode *inode = d_inode(dentry); - struct buffer_head *bh; - struct bfs_dirent *de; - struct bfs_sb_info *info = BFS_SB(inode->i_sb); - - mutex_lock(&info->bfs_lock); - bh = bfs_find_entry(dir, &dentry->d_name, &de); - if (!bh || (le16_to_cpu(de->ino) != inode->i_ino)) - goto out_brelse; - - if (!inode->i_nlink) { - printf("unlinking non-existent file %s:%llu (nlink=%d)\n", - inode->i_sb->s_id, inode->i_ino, - inode->i_nlink); - set_nlink(inode, 1); - } - de->ino = 0; - mmb_mark_buffer_dirty(bh, &BFS_I(dir)->i_metadata_bhs); - inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); - mark_inode_dirty(dir); - inode_set_ctime_to_ts(inode, inode_get_ctime(dir)); - inode_dec_link_count(inode); - error = 0; - -out_brelse: - brelse(bh); - mutex_unlock(&info->bfs_lock); - return error; -} - -static int bfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, - struct dentry *old_dentry, struct inode *new_dir, - struct dentry *new_dentry, unsigned int flags) -{ - struct inode *old_inode, *new_inode; - struct buffer_head *old_bh, *new_bh; - struct bfs_dirent *old_de, *new_de; - struct bfs_sb_info *info; - int error = -ENOENT; - - if (flags & ~RENAME_NOREPLACE) - return -EINVAL; - - old_bh = new_bh = NULL; - old_inode = d_inode(old_dentry); - if (S_ISDIR(old_inode->i_mode)) - return -EINVAL; - - info = BFS_SB(old_inode->i_sb); - - mutex_lock(&info->bfs_lock); - old_bh = bfs_find_entry(old_dir, &old_dentry->d_name, &old_de); - - if (!old_bh || (le16_to_cpu(old_de->ino) != old_inode->i_ino)) - goto end_rename; - - error = -EPERM; - new_inode = d_inode(new_dentry); - new_bh = bfs_find_entry(new_dir, &new_dentry->d_name, &new_de); - - if (new_bh && !new_inode) { - brelse(new_bh); - new_bh = NULL; - } - if (!new_bh) { - error = bfs_add_entry(new_dir, &new_dentry->d_name, - old_inode->i_ino); - if (error) - goto end_rename; - } - old_de->ino = 0; - inode_set_mtime_to_ts(old_dir, inode_set_ctime_current(old_dir)); - mark_inode_dirty(old_dir); - if (new_inode) { - inode_set_ctime_current(new_inode); - inode_dec_link_count(new_inode); - } - mmb_mark_buffer_dirty(old_bh, &BFS_I(old_dir)->i_metadata_bhs); - error = 0; - -end_rename: - mutex_unlock(&info->bfs_lock); - brelse(old_bh); - brelse(new_bh); - return error; -} - -const struct inode_operations bfs_dir_inops = { - .create = bfs_create, - .lookup = bfs_lookup, - .link = bfs_link, - .unlink = bfs_unlink, - .rename = bfs_rename, -}; - -static int bfs_add_entry(struct inode *dir, const struct qstr *child, int ino) -{ - const unsigned char *name = child->name; - int namelen = child->len; - struct buffer_head *bh; - struct bfs_dirent *de; - int block, sblock, eblock, off, pos; - int i; - - dprintf("name=%s, namelen=%d\n", name, namelen); - - sblock = BFS_I(dir)->i_sblock; - eblock = BFS_I(dir)->i_eblock; - for (block = sblock; block <= eblock; block++) { - bh = sb_bread(dir->i_sb, block); - if (!bh) - return -EIO; - for (off = 0; off < BFS_BSIZE; off += BFS_DIRENT_SIZE) { - de = (struct bfs_dirent *)(bh->b_data + off); - if (!de->ino) { - pos = (block - sblock) * BFS_BSIZE + off; - if (pos >= dir->i_size) { - dir->i_size += BFS_DIRENT_SIZE; - inode_set_ctime_current(dir); - } - inode_set_mtime_to_ts(dir, - inode_set_ctime_current(dir)); - mark_inode_dirty(dir); - de->ino = cpu_to_le16((u16)ino); - for (i = 0; i < BFS_NAMELEN; i++) - de->name[i] = - (i < namelen) ? name[i] : 0; - mmb_mark_buffer_dirty(bh, - &BFS_I(dir)->i_metadata_bhs); - brelse(bh); - return 0; - } - } - brelse(bh); - } - return -ENOSPC; -} - -static inline int bfs_namecmp(int len, const unsigned char *name, - const char *buffer) -{ - if ((len < BFS_NAMELEN) && buffer[len]) - return 0; - return !memcmp(name, buffer, len); -} - -static struct buffer_head *bfs_find_entry(struct inode *dir, - const struct qstr *child, - struct bfs_dirent **res_dir) -{ - unsigned long block = 0, offset = 0; - struct buffer_head *bh = NULL; - struct bfs_dirent *de; - const unsigned char *name = child->name; - int namelen = child->len; - - *res_dir = NULL; - if (namelen > BFS_NAMELEN) - return NULL; - - while (block * BFS_BSIZE + offset < dir->i_size) { - if (!bh) { - bh = sb_bread(dir->i_sb, BFS_I(dir)->i_sblock + block); - if (!bh) { - block++; - continue; - } - } - de = (struct bfs_dirent *)(bh->b_data + offset); - offset += BFS_DIRENT_SIZE; - if (le16_to_cpu(de->ino) && - bfs_namecmp(namelen, name, de->name)) { - *res_dir = de; - return bh; - } - if (offset < bh->b_size) - continue; - brelse(bh); - bh = NULL; - offset = 0; - block++; - } - brelse(bh); - return NULL; -} diff --git a/fs/bfs/file.c b/fs/bfs/file.c deleted file mode 100644 index d33d6bde992b..000000000000 --- a/fs/bfs/file.c +++ /dev/null @@ -1,203 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * fs/bfs/file.c - * BFS file operations. - * Copyright (C) 1999-2018 Tigran Aivazian - * - * Make the file block allocation algorithm understand the size - * of the underlying block device. - * Copyright (C) 2007 Dmitri Vorobiev - * - */ - -#include -#include -#include -#include "bfs.h" - -#undef DEBUG - -#ifdef DEBUG -#define dprintf(x...) printf(x) -#else -#define dprintf(x...) -#endif - -const struct file_operations bfs_file_operations = { - .llseek = generic_file_llseek, - .read_iter = generic_file_read_iter, - .write_iter = generic_file_write_iter, - .mmap_prepare = generic_file_mmap_prepare, - .splice_read = filemap_splice_read, -}; - -static int bfs_move_block(unsigned long from, unsigned long to, - struct super_block *sb) -{ - struct buffer_head *bh, *new; - - bh = sb_bread(sb, from); - if (!bh) - return -EIO; - new = sb_getblk(sb, to); - memcpy(new->b_data, bh->b_data, bh->b_size); - mark_buffer_dirty(new); - bforget(bh); - brelse(new); - return 0; -} - -static int bfs_move_blocks(struct super_block *sb, unsigned long start, - unsigned long end, unsigned long where) -{ - unsigned long i; - - dprintf("%08lx-%08lx->%08lx\n", start, end, where); - for (i = start; i <= end; i++) - if(bfs_move_block(i, where + i, sb)) { - dprintf("failed to move block %08lx -> %08lx\n", i, - where + i); - return -EIO; - } - return 0; -} - -static int bfs_get_block(struct inode *inode, sector_t block, - struct buffer_head *bh_result, int create) -{ - unsigned long phys; - int err; - struct super_block *sb = inode->i_sb; - struct bfs_sb_info *info = BFS_SB(sb); - struct bfs_inode_info *bi = BFS_I(inode); - - phys = bi->i_sblock + block; - if (!create) { - if (phys <= bi->i_eblock) { - dprintf("c=%d, b=%08lx, phys=%09lx (granted)\n", - create, (unsigned long)block, phys); - map_bh(bh_result, sb, phys); - } - return 0; - } - - /* - * If the file is not empty and the requested block is within the - * range of blocks allocated for this file, we can grant it. - */ - if (bi->i_sblock && (phys <= bi->i_eblock)) { - dprintf("c=%d, b=%08lx, phys=%08lx (interim block granted)\n", - create, (unsigned long)block, phys); - map_bh(bh_result, sb, phys); - return 0; - } - - /* The file will be extended, so let's see if there is enough space. */ - if (phys >= info->si_blocks) - return -ENOSPC; - - /* The rest has to be protected against itself. */ - mutex_lock(&info->bfs_lock); - - /* - * If the last data block for this file is the last allocated - * block, we can extend the file trivially, without moving it - * anywhere. - */ - if (bi->i_eblock == info->si_lf_eblk) { - dprintf("c=%d, b=%08lx, phys=%08lx (simple extension)\n", - create, (unsigned long)block, phys); - map_bh(bh_result, sb, phys); - info->si_freeb -= phys - bi->i_eblock; - info->si_lf_eblk = bi->i_eblock = phys; - mark_inode_dirty(inode); - err = 0; - goto out; - } - - /* Ok, we have to move this entire file to the next free block. */ - phys = info->si_lf_eblk + 1; - if (phys + block >= info->si_blocks) { - err = -ENOSPC; - goto out; - } - - if (bi->i_sblock) { - err = bfs_move_blocks(inode->i_sb, bi->i_sblock, - bi->i_eblock, phys); - if (err) { - dprintf("failed to move ino=%08lx -> fs corruption\n", - inode->i_ino); - goto out; - } - } else - err = 0; - - dprintf("c=%d, b=%08lx, phys=%08lx (moved)\n", - create, (unsigned long)block, phys); - bi->i_sblock = phys; - phys += block; - info->si_lf_eblk = bi->i_eblock = phys; - - /* - * This assumes nothing can write the inode back while we are here - * and thus update inode->i_blocks! (XXX) - */ - info->si_freeb -= bi->i_eblock - bi->i_sblock + 1 - inode->i_blocks; - mark_inode_dirty(inode); - map_bh(bh_result, sb, phys); -out: - mutex_unlock(&info->bfs_lock); - return err; -} - -static int bfs_writepages(struct address_space *mapping, - struct writeback_control *wbc) -{ - return mpage_writepages(mapping, wbc, bfs_get_block); -} - -static int bfs_read_folio(struct file *file, struct folio *folio) -{ - return block_read_full_folio(folio, bfs_get_block); -} - -static void bfs_write_failed(struct address_space *mapping, loff_t to) -{ - struct inode *inode = mapping->host; - - if (to > inode->i_size) - truncate_pagecache(inode, inode->i_size); -} - -static int bfs_write_begin(const struct kiocb *iocb, - struct address_space *mapping, - loff_t pos, unsigned len, - struct folio **foliop, void **fsdata) -{ - int ret; - - ret = block_write_begin(mapping, pos, len, foliop, bfs_get_block); - if (unlikely(ret)) - bfs_write_failed(mapping, pos + len); - - return ret; -} - -static sector_t bfs_bmap(struct address_space *mapping, sector_t block) -{ - return generic_block_bmap(mapping, block, bfs_get_block); -} - -const struct address_space_operations bfs_aops = { - .dirty_folio = block_dirty_folio, - .invalidate_folio = block_invalidate_folio, - .read_folio = bfs_read_folio, - .writepages = bfs_writepages, - .write_begin = bfs_write_begin, - .write_end = generic_write_end, - .migrate_folio = buffer_migrate_folio, - .bmap = bfs_bmap, -}; - -const struct inode_operations bfs_file_inops; diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c deleted file mode 100644 index 06e3a848b4ef..000000000000 --- a/fs/bfs/inode.c +++ /dev/null @@ -1,538 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * fs/bfs/inode.c - * BFS superblock and inode operations. - * Copyright (C) 1999-2018 Tigran Aivazian - * From fs/minix, Copyright (C) 1991, 1992 Linus Torvalds. - * Made endianness-clean by Andrew Stribblehill , 2005. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include "bfs.h" - -MODULE_AUTHOR("Tigran Aivazian "); -MODULE_DESCRIPTION("SCO UnixWare BFS filesystem for Linux"); -MODULE_LICENSE("GPL"); - -#undef DEBUG - -#ifdef DEBUG -#define dprintf(x...) printf(x) -#else -#define dprintf(x...) -#endif - -struct inode *bfs_iget(struct super_block *sb, unsigned long ino) -{ - struct bfs_inode *di; - struct inode *inode; - struct buffer_head *bh; - int block, off; - - inode = iget_locked(sb, ino); - if (!inode) - return ERR_PTR(-ENOMEM); - if (!(inode_state_read_once(inode) & I_NEW)) - return inode; - - if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(inode->i_sb)->si_lasti)) { - printf("Bad inode number %s:%08lx\n", inode->i_sb->s_id, ino); - goto error; - } - - block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; - bh = sb_bread(inode->i_sb, block); - if (!bh) { - printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id, - ino); - goto error; - } - - off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; - di = (struct bfs_inode *)bh->b_data + off; - - /* - * https://martin.hinner.info/fs/bfs/bfs-structure.html explains that - * BFS in SCO UnixWare environment used only lower 9 bits of di->i_mode - * value. This means that, although bfs_write_inode() saves whole - * inode->i_mode bits (which include S_IFMT bits and S_IS{UID,GID,VTX} - * bits), middle 7 bits of di->i_mode value can be garbage when these - * bits were not saved by bfs_write_inode(). - * Since we can't tell whether middle 7 bits are garbage, use only - * lower 12 bits (i.e. tolerate S_IS{UID,GID,VTX} bits possibly being - * garbage) and reconstruct S_IFMT bits for Linux environment from - * di->i_vtype value. - */ - inode->i_mode = 0x00000FFF & le32_to_cpu(di->i_mode); - if (le32_to_cpu(di->i_vtype) == BFS_VDIR) { - inode->i_mode |= S_IFDIR; - inode->i_op = &bfs_dir_inops; - inode->i_fop = &bfs_dir_operations; - } else if (le32_to_cpu(di->i_vtype) == BFS_VREG) { - inode->i_mode |= S_IFREG; - inode->i_op = &bfs_file_inops; - inode->i_fop = &bfs_file_operations; - inode->i_mapping->a_ops = &bfs_aops; - } else { - brelse(bh); - printf("Unknown vtype=%u %s:%08lx\n", - le32_to_cpu(di->i_vtype), inode->i_sb->s_id, ino); - goto error; - } - - BFS_I(inode)->i_sblock = le32_to_cpu(di->i_sblock); - BFS_I(inode)->i_eblock = le32_to_cpu(di->i_eblock); - BFS_I(inode)->i_dsk_ino = le16_to_cpu(di->i_ino); - i_uid_write(inode, le32_to_cpu(di->i_uid)); - i_gid_write(inode, le32_to_cpu(di->i_gid)); - set_nlink(inode, le32_to_cpu(di->i_nlink)); - inode->i_size = BFS_FILESIZE(di); - inode->i_blocks = BFS_FILEBLOCKS(di); - inode_set_atime(inode, le32_to_cpu(di->i_atime), 0); - inode_set_mtime(inode, le32_to_cpu(di->i_mtime), 0); - inode_set_ctime(inode, le32_to_cpu(di->i_ctime), 0); - - brelse(bh); - unlock_new_inode(inode); - return inode; - -error: - iget_failed(inode); - return ERR_PTR(-EIO); -} - -static struct bfs_inode *find_inode(struct super_block *sb, u16 ino, struct buffer_head **p) -{ - if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(sb)->si_lasti)) { - printf("Bad inode number %s:%08x\n", sb->s_id, ino); - return ERR_PTR(-EIO); - } - - ino -= BFS_ROOT_INO; - - *p = sb_bread(sb, 1 + ino / BFS_INODES_PER_BLOCK); - if (!*p) { - printf("Unable to read inode %s:%08x\n", sb->s_id, ino); - return ERR_PTR(-EIO); - } - - return (struct bfs_inode *)(*p)->b_data + ino % BFS_INODES_PER_BLOCK; -} - -static int bfs_write_inode(struct inode *inode, struct writeback_control *wbc) -{ - struct bfs_sb_info *info = BFS_SB(inode->i_sb); - unsigned int ino = (u16)inode->i_ino; - unsigned long i_sblock; - struct bfs_inode *di; - struct buffer_head *bh; - - dprintf("ino=%08x\n", ino); - - di = find_inode(inode->i_sb, ino, &bh); - if (IS_ERR(di)) - return PTR_ERR(di); - - mutex_lock(&info->bfs_lock); - - if (ino == BFS_ROOT_INO) - di->i_vtype = cpu_to_le32(BFS_VDIR); - else - di->i_vtype = cpu_to_le32(BFS_VREG); - - di->i_ino = cpu_to_le16(ino); - di->i_mode = cpu_to_le32(inode->i_mode); - di->i_uid = cpu_to_le32(i_uid_read(inode)); - di->i_gid = cpu_to_le32(i_gid_read(inode)); - di->i_nlink = cpu_to_le32(inode->i_nlink); - di->i_atime = cpu_to_le32(inode_get_atime_sec(inode)); - di->i_mtime = cpu_to_le32(inode_get_mtime_sec(inode)); - di->i_ctime = cpu_to_le32(inode_get_ctime_sec(inode)); - i_sblock = BFS_I(inode)->i_sblock; - di->i_sblock = cpu_to_le32(i_sblock); - di->i_eblock = cpu_to_le32(BFS_I(inode)->i_eblock); - di->i_eoffset = cpu_to_le32(i_sblock * BFS_BSIZE + inode->i_size - 1); - - mark_buffer_dirty(bh); - brelse(bh); - mutex_unlock(&info->bfs_lock); - set_inode_metadata_writeback(inode); - return 0; -} - -static int bfs_sync_inode_metadata(struct inode *inode, - struct writeback_control *wbc) -{ - int err = 0; - struct bfs_inode *di; - struct buffer_head *bh; - - di = find_inode(inode->i_sb, (u16)inode->i_ino, &bh); - if (IS_ERR(di)) - return PTR_ERR(di); - - sync_dirty_buffer(bh); - if (buffer_write_io_error(bh)) { - err = -EIO; - goto out; - } - err = mmb_sync(&BFS_I(inode)->i_metadata_bhs); -out: - brelse(bh); - return err; -} - -static void bfs_evict_inode(struct inode *inode) -{ - unsigned long ino = inode->i_ino; - struct bfs_inode *di; - struct buffer_head *bh; - struct super_block *s = inode->i_sb; - struct bfs_sb_info *info = BFS_SB(s); - struct bfs_inode_info *bi = BFS_I(inode); - - dprintf("ino=%08lx\n", ino); - - truncate_inode_pages_final(&inode->i_data); - if (inode->i_nlink) - mmb_sync(&BFS_I(inode)->i_metadata_bhs); - mmb_invalidate(&BFS_I(inode)->i_metadata_bhs); - clear_inode(inode); - - if (inode->i_nlink) - return; - - di = find_inode(s, inode->i_ino, &bh); - if (IS_ERR(di)) - return; - - mutex_lock(&info->bfs_lock); - /* clear on-disk inode */ - memset(di, 0, sizeof(struct bfs_inode)); - mark_buffer_dirty(bh); - brelse(bh); - - if (bi->i_dsk_ino) { - if (bi->i_sblock) - info->si_freeb += bi->i_eblock + 1 - bi->i_sblock; - info->si_freei++; - clear_bit(ino, info->si_imap); - bfs_dump_imap("evict_inode", s); - } - - /* - * If this was the last file, make the previous block - * "last block of the last file" even if there is no - * real file there, saves us 1 gap. - */ - if (info->si_lf_eblk == bi->i_eblock) - info->si_lf_eblk = bi->i_sblock - 1; - mutex_unlock(&info->bfs_lock); -} - -static void bfs_put_super(struct super_block *s) -{ - struct bfs_sb_info *info = BFS_SB(s); - - if (!info) - return; - - mutex_destroy(&info->bfs_lock); - kfree(info); - s->s_fs_info = NULL; -} - -static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf) -{ - struct super_block *s = dentry->d_sb; - struct bfs_sb_info *info = BFS_SB(s); - u64 id = huge_encode_dev(s->s_bdev->bd_dev); - buf->f_type = BFS_MAGIC; - buf->f_bsize = s->s_blocksize; - buf->f_blocks = info->si_blocks; - buf->f_bfree = buf->f_bavail = info->si_freeb; - buf->f_files = info->si_lasti + 1 - BFS_ROOT_INO; - buf->f_ffree = info->si_freei; - buf->f_fsid = u64_to_fsid(id); - buf->f_namelen = BFS_NAMELEN; - return 0; -} - -static struct kmem_cache *bfs_inode_cachep; - -static struct inode *bfs_alloc_inode(struct super_block *sb) -{ - struct bfs_inode_info *bi; - bi = alloc_inode_sb(sb, bfs_inode_cachep, GFP_KERNEL); - if (!bi) - return NULL; - mmb_init(&bi->i_metadata_bhs, &bi->vfs_inode.i_data); - - return &bi->vfs_inode; -} - -static void bfs_free_inode(struct inode *inode) -{ - kmem_cache_free(bfs_inode_cachep, BFS_I(inode)); -} - -static void init_once(void *foo) -{ - struct bfs_inode_info *bi = foo; - - inode_init_once(&bi->vfs_inode); -} - -static int __init init_inodecache(void) -{ - bfs_inode_cachep = kmem_cache_create("bfs_inode_cache", - sizeof(struct bfs_inode_info), - 0, (SLAB_RECLAIM_ACCOUNT| - SLAB_ACCOUNT), - init_once); - if (bfs_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(bfs_inode_cachep); -} - -static const struct super_operations bfs_sops = { - .alloc_inode = bfs_alloc_inode, - .free_inode = bfs_free_inode, - .write_inode = bfs_write_inode, - .sync_inode_metadata = bfs_sync_inode_metadata, - .evict_inode = bfs_evict_inode, - .put_super = bfs_put_super, - .statfs = bfs_statfs, -}; - -void bfs_dump_imap(const char *prefix, struct super_block *s) -{ -#ifdef DEBUG - int i; - char *tmpbuf = kzalloc(PAGE_SIZE, GFP_KERNEL); - - if (!tmpbuf) - return; - for (i = BFS_SB(s)->si_lasti; i >= 0; i--) { - if (i > PAGE_SIZE - 100) break; - if (test_bit(i, BFS_SB(s)->si_imap)) - strcat(tmpbuf, "1"); - else - strcat(tmpbuf, "0"); - } - printf("%s: lasti=%08lx <%s>\n", prefix, BFS_SB(s)->si_lasti, tmpbuf); - kfree(tmpbuf); -#endif -} - -static int bfs_fill_super(struct super_block *s, struct fs_context *fc) -{ - struct buffer_head *bh, *sbh; - struct bfs_super_block *bfs_sb; - struct inode *inode; - unsigned i; - struct bfs_sb_info *info; - int ret = -EINVAL; - unsigned long i_sblock, i_eblock, i_eoff, s_size; - int silent = fc->sb_flags & SB_SILENT; - - info = kzalloc_obj(*info); - if (!info) - return -ENOMEM; - mutex_init(&info->bfs_lock); - s->s_fs_info = info; - s->s_time_min = 0; - s->s_time_max = U32_MAX; - - if (!sb_set_blocksize(s, BFS_BSIZE)) - goto out; - - sbh = sb_bread(s, 0); - if (!sbh) - goto out; - bfs_sb = (struct bfs_super_block *)sbh->b_data; - if (le32_to_cpu(bfs_sb->s_magic) != BFS_MAGIC) { - if (!silent) - printf("No BFS filesystem on %s (magic=%08x)\n", s->s_id, le32_to_cpu(bfs_sb->s_magic)); - goto out1; - } - if (BFS_UNCLEAN(bfs_sb, s) && !silent) - printf("%s is unclean, continuing\n", s->s_id); - - s->s_magic = BFS_MAGIC; - - if (le32_to_cpu(bfs_sb->s_start) > le32_to_cpu(bfs_sb->s_end) || - le32_to_cpu(bfs_sb->s_start) < sizeof(struct bfs_super_block) + sizeof(struct bfs_dirent)) { - printf("Superblock is corrupted on %s\n", s->s_id); - goto out1; - } - - info->si_lasti = (le32_to_cpu(bfs_sb->s_start) - BFS_BSIZE) / sizeof(struct bfs_inode) + BFS_ROOT_INO - 1; - if (info->si_lasti == BFS_MAX_LASTI) - printf("NOTE: filesystem %s was created with 512 inodes, the real maximum is 511, mounting anyway\n", s->s_id); - else if (info->si_lasti > BFS_MAX_LASTI) { - printf("Impossible last inode number %lu > %d on %s\n", info->si_lasti, BFS_MAX_LASTI, s->s_id); - goto out1; - } - for (i = 0; i < BFS_ROOT_INO; i++) - set_bit(i, info->si_imap); - - s->s_op = &bfs_sops; - inode = bfs_iget(s, BFS_ROOT_INO); - if (IS_ERR(inode)) { - ret = PTR_ERR(inode); - goto out1; - } - s->s_root = d_make_root(inode); - if (!s->s_root) { - ret = -ENOMEM; - goto out1; - } - - info->si_blocks = (le32_to_cpu(bfs_sb->s_end) + 1) >> BFS_BSIZE_BITS; - info->si_freeb = (le32_to_cpu(bfs_sb->s_end) + 1 - le32_to_cpu(bfs_sb->s_start)) >> BFS_BSIZE_BITS; - info->si_freei = 0; - info->si_lf_eblk = 0; - - /* can we read the last block? */ - bh = sb_bread(s, info->si_blocks - 1); - if (!bh) { - printf("Last block not available on %s: %lu\n", s->s_id, info->si_blocks - 1); - ret = -EIO; - goto out2; - } - brelse(bh); - - bh = NULL; - for (i = BFS_ROOT_INO; i <= info->si_lasti; i++) { - struct bfs_inode *di; - int block = (i - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; - int off = (i - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; - unsigned long eblock; - - if (!off) { - brelse(bh); - bh = sb_bread(s, block); - } - - if (!bh) - continue; - - di = (struct bfs_inode *)bh->b_data + off; - - /* test if filesystem is not corrupted */ - - i_eoff = le32_to_cpu(di->i_eoffset); - i_sblock = le32_to_cpu(di->i_sblock); - i_eblock = le32_to_cpu(di->i_eblock); - s_size = le32_to_cpu(bfs_sb->s_end); - - if (i_sblock > info->si_blocks || - i_eblock > info->si_blocks || - i_sblock > i_eblock || - (i_eoff != le32_to_cpu(-1) && i_eoff > s_size) || - i_sblock * BFS_BSIZE > i_eoff) { - - printf("Inode 0x%08x corrupted on %s\n", i, s->s_id); - - brelse(bh); - ret = -EIO; - goto out2; - } - - if (!di->i_ino) { - info->si_freei++; - continue; - } - set_bit(i, info->si_imap); - info->si_freeb -= BFS_FILEBLOCKS(di); - - eblock = le32_to_cpu(di->i_eblock); - if (eblock > info->si_lf_eblk) - info->si_lf_eblk = eblock; - } - brelse(bh); - brelse(sbh); - bfs_dump_imap("fill_super", s); - return 0; - -out2: - dput(s->s_root); - s->s_root = NULL; -out1: - brelse(sbh); -out: - mutex_destroy(&info->bfs_lock); - kfree(info); - s->s_fs_info = NULL; - return ret; -} - -static int bfs_get_tree(struct fs_context *fc) -{ - return get_tree_bdev(fc, bfs_fill_super); -} - -static const struct fs_context_operations bfs_context_ops = { - .get_tree = bfs_get_tree, -}; - -static int bfs_init_fs_context(struct fs_context *fc) -{ - fc->ops = &bfs_context_ops; - - return 0; -} - -static struct file_system_type bfs_fs_type = { - .owner = THIS_MODULE, - .name = "bfs", - .init_fs_context = bfs_init_fs_context, - .kill_sb = kill_block_super, - .fs_flags = FS_REQUIRES_DEV, -}; -MODULE_ALIAS_FS("bfs"); - -static int __init init_bfs_fs(void) -{ - int err = init_inodecache(); - if (err) - goto out1; - err = register_filesystem(&bfs_fs_type); - if (err) - goto out; - return 0; -out: - destroy_inodecache(); -out1: - return err; -} - -static void __exit exit_bfs_fs(void) -{ - unregister_filesystem(&bfs_fs_type); - destroy_inodecache(); -} - -module_init(init_bfs_fs) -module_exit(exit_bfs_fs) diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c index 60c2c544db6a..52544512edc7 100644 --- a/tools/testing/selftests/filesystems/statmount/statmount_test.c +++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c @@ -17,7 +17,7 @@ static const char *const known_fs[] = { "9p", "adfs", "affs", "afs", "aio", "anon_inodefs", "apparmorfs", - "autofs", "bcachefs", "bdev", "befs", "bfs", "binder", "binfmt_misc", + "autofs", "bcachefs", "bdev", "befs", "binder", "binfmt_misc", "bpf", "btrfs", "btrfs_test_fs", "ceph", "cgroup", "cgroup2", "cifs", "coda", "configfs", "cpuset", "cramfs", "cxl", "dax", "debugfs", "devpts", "devtmpfs", "dmabuf", "drm", "ecryptfs", "efivarfs", "efs",