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alistair23-linux/fs/bfs/inode.c
Paul Mundt 20c2df83d2 mm: Remove slab destructors from kmem_cache_create(). 
Slab destructors were no longer supported after Christoph's
c59def9f22 change. They've been
BUGs for both slab and slub, and slob never supported them
either.

This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 10:11:58 +09:00

445 lines
11 KiB
C
Raw Blame History

/*
* fs/bfs/inode.c
* BFS superblock and inode operations.
* Copyright (C) 1999-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
* From fs/minix, Copyright (C) 1991, 1992 Linus Torvalds.
*
* Made endianness-clean by Andrew Stribblehill <ads@wompom.org>, 2005.
*/
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
#include <linux/vfs.h>
#include <asm/uaccess.h>
#include "bfs.h"
MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
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
void dump_imap(const char *prefix, struct super_block * s);
static void bfs_read_inode(struct inode * inode)
{
unsigned long ino = inode->i_ino;
struct bfs_inode * di;
struct buffer_head * bh;
int block, off;
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);
make_bad_inode(inode);
return;
}
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);
make_bad_inode(inode);
return;
}
off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK;
di = (struct bfs_inode *)bh->b_data + off;
inode->i_mode = 0x0000FFFF & 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;
}
BFS_I(inode)->i_sblock = le32_to_cpu(di->i_sblock);
BFS_I(inode)->i_eblock = le32_to_cpu(di->i_eblock);
inode->i_uid = le32_to_cpu(di->i_uid);
inode->i_gid = le32_to_cpu(di->i_gid);
inode->i_nlink = le32_to_cpu(di->i_nlink);
inode->i_size = BFS_FILESIZE(di);
inode->i_blocks = BFS_FILEBLOCKS(di);
if (inode->i_size || inode->i_blocks) dprintf("Registered inode with %lld size, %ld blocks\n", inode->i_size, inode->i_blocks);
inode->i_atime.tv_sec = le32_to_cpu(di->i_atime);
inode->i_mtime.tv_sec = le32_to_cpu(di->i_mtime);
inode->i_ctime.tv_sec = le32_to_cpu(di->i_ctime);
inode->i_atime.tv_nsec = 0;
inode->i_mtime.tv_nsec = 0;
inode->i_ctime.tv_nsec = 0;
BFS_I(inode)->i_dsk_ino = le16_to_cpu(di->i_ino); /* can be 0 so we store a copy */
brelse(bh);
}
static int bfs_write_inode(struct inode * inode, int unused)
{
unsigned int ino = (u16)inode->i_ino;
unsigned long i_sblock;
struct bfs_inode * di;
struct buffer_head * bh;
int block, off;
dprintf("ino=%08x\n", ino);
if (ino < BFS_ROOT_INO || ino > BFS_SB(inode->i_sb)->si_lasti) {
printf("Bad inode number %s:%08x\n", inode->i_sb->s_id, ino);
return -EIO;
}
lock_kernel();
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:%08x\n", inode->i_sb->s_id, ino);
unlock_kernel();
return -EIO;
}
off = (ino - BFS_ROOT_INO)%BFS_INODES_PER_BLOCK;
di = (struct bfs_inode *)bh->b_data + off;
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(inode->i_uid);
di->i_gid = cpu_to_le32(inode->i_gid);
di->i_nlink = cpu_to_le32(inode->i_nlink);
di->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
di->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
di->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
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);
dprintf("Written ino=%d into %d:%d\n",le16_to_cpu(di->i_ino),block,off);
brelse(bh);
unlock_kernel();
return 0;
}
static void bfs_delete_inode(struct inode * inode)
{
unsigned long ino = inode->i_ino;
struct bfs_inode * di;
struct buffer_head * bh;
int block, off;
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(&inode->i_data, 0);
if (ino < BFS_ROOT_INO || ino > info->si_lasti) {
printf("invalid ino=%08lx\n", ino);
return;
}
inode->i_size = 0;
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
lock_kernel();
mark_inode_dirty(inode);
block = (ino - BFS_ROOT_INO)/BFS_INODES_PER_BLOCK + 1;
bh = sb_bread(s, block);
if (!bh) {
printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id, ino);
unlock_kernel();
return;
}
off = (ino - BFS_ROOT_INO)%BFS_INODES_PER_BLOCK;
di = (struct bfs_inode *) bh->b_data + off;
if (bi->i_dsk_ino) {
info->si_freeb += 1 + bi->i_eblock - bi->i_sblock;
info->si_freei++;
clear_bit(ino, info->si_imap);
dump_imap("delete_inode", s);
}
di->i_ino = 0;
di->i_sblock = 0;
mark_buffer_dirty(bh);
brelse(bh);
/* if this was the last file, make the previous
block "last files last block" even if there is no real file there,
saves us 1 gap */
if (info->si_lf_eblk == BFS_I(inode)->i_eblock) {
info->si_lf_eblk = BFS_I(inode)->i_sblock - 1;
mark_buffer_dirty(info->si_sbh);
}
unlock_kernel();
clear_inode(inode);
}
static void bfs_put_super(struct super_block *s)
{
struct bfs_sb_info *info = BFS_SB(s);
brelse(info->si_sbh);
kfree(info->si_imap);
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.val[0] = (u32)id;
buf->f_fsid.val[1] = (u32)(id >> 32);
buf->f_namelen = BFS_NAMELEN;
return 0;
}
static void bfs_write_super(struct super_block *s)
{
lock_kernel();
if (!(s->s_flags & MS_RDONLY))
mark_buffer_dirty(BFS_SB(s)->si_sbh);
s->s_dirt = 0;
unlock_kernel();
}
static struct kmem_cache * bfs_inode_cachep;
static struct inode *bfs_alloc_inode(struct super_block *sb)
{
struct bfs_inode_info *bi;
bi = kmem_cache_alloc(bfs_inode_cachep, GFP_KERNEL);
if (!bi)
return NULL;
return &bi->vfs_inode;
}
static void bfs_destroy_inode(struct inode *inode)
{
kmem_cache_free(bfs_inode_cachep, BFS_I(inode));
}
static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
{
struct bfs_inode_info *bi = foo;
inode_init_once(&bi->vfs_inode);
}
static int init_inodecache(void)
{
bfs_inode_cachep = kmem_cache_create("bfs_inode_cache",
sizeof(struct bfs_inode_info),
0, (SLAB_RECLAIM_ACCOUNT|
SLAB_MEM_SPREAD),
init_once);
if (bfs_inode_cachep == NULL)
return -ENOMEM;
return 0;
}
static void destroy_inodecache(void)
{
kmem_cache_destroy(bfs_inode_cachep);
}
static const struct super_operations bfs_sops = {
.alloc_inode = bfs_alloc_inode,
.destroy_inode = bfs_destroy_inode,
.read_inode = bfs_read_inode,
.write_inode = bfs_write_inode,
.delete_inode = bfs_delete_inode,
.put_super = bfs_put_super,
.write_super = bfs_write_super,
.statfs = bfs_statfs,
};
void dump_imap(const char *prefix, struct super_block * s)
{
#ifdef DEBUG
int i;
char *tmpbuf = (char *)get_zeroed_page(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");
}
printk(KERN_ERR "BFS-fs: %s: lasti=%08lx <%s>\n", prefix, BFS_SB(s)->si_lasti, tmpbuf);
free_page((unsigned long)tmpbuf);
#endif
}
static int bfs_fill_super(struct super_block *s, void *data, int silent)
{
struct buffer_head * bh;
struct bfs_super_block * bfs_sb;
struct inode * inode;
unsigned i, imap_len;
struct bfs_sb_info * info;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
s->s_fs_info = info;
sb_set_blocksize(s, BFS_BSIZE);
bh = sb_bread(s, 0);
if(!bh)
goto out;
bfs_sb = (struct bfs_super_block *)bh->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 out;
}
if (BFS_UNCLEAN(bfs_sb, s) && !silent)
printf("%s is unclean, continuing\n", s->s_id);
s->s_magic = BFS_MAGIC;
info->si_sbh = bh;
info->si_lasti = (le32_to_cpu(bfs_sb->s_start) - BFS_BSIZE)/sizeof(struct bfs_inode)
+ BFS_ROOT_INO - 1;
imap_len = info->si_lasti/8 + 1;
info->si_imap = kzalloc(imap_len, GFP_KERNEL);
if (!info->si_imap)
goto out;
for (i=0; i<BFS_ROOT_INO; i++)
set_bit(i, info->si_imap);
s->s_op = &bfs_sops;
inode = iget(s, BFS_ROOT_INO);
if (!inode) {
kfree(info->si_imap);
goto out;
}
s->s_root = d_alloc_root(inode);
if (!s->s_root) {
iput(inode);
kfree(info->si_imap);
goto out;
}
info->si_blocks = (le32_to_cpu(bfs_sb->s_end) + 1)>>BFS_BSIZE_BITS; /* for statfs(2) */
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;
info->si_lf_sblk = 0;
info->si_lf_ioff = 0;
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 sblock, eblock;
if (!off) {
brelse(bh);
bh = sb_bread(s, block);
}
if (!bh)
continue;
di = (struct bfs_inode *)bh->b_data + off;
if (!di->i_ino) {
info->si_freei++;
continue;
}
set_bit(i, info->si_imap);
info->si_freeb -= BFS_FILEBLOCKS(di);
sblock = le32_to_cpu(di->i_sblock);
eblock = le32_to_cpu(di->i_eblock);
if (eblock > info->si_lf_eblk) {
info->si_lf_eblk = eblock;
info->si_lf_sblk = sblock;
info->si_lf_ioff = BFS_INO2OFF(i);
}
}
brelse(bh);
if (!(s->s_flags & MS_RDONLY)) {
mark_buffer_dirty(info->si_sbh);
s->s_dirt = 1;
}
dump_imap("read_super", s);
return 0;
out:
brelse(bh);
kfree(info);
s->s_fs_info = NULL;
return -EINVAL;
}
static int bfs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
return get_sb_bdev(fs_type, flags, dev_name, data, bfs_fill_super, mnt);
}
static struct file_system_type bfs_fs_type = {
.owner = THIS_MODULE,
.name = "bfs",
.get_sb = bfs_get_sb,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
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)
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