kernel-ark/fs/coda/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

307 lines
6.6 KiB
C

/*
* Super block/filesystem wide operations
*
* Copyright (C) 1996 Peter J. Braam <braam@maths.ox.ac.uk> and
* Michael Callahan <callahan@maths.ox.ac.uk>
*
* Rewritten for Linux 2.1. Peter Braam <braam@cs.cmu.edu>
* Copyright (C) Carnegie Mellon University
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/smp_lock.h>
#include <linux/file.h>
#include <linux/vfs.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <linux/fs.h>
#include <linux/vmalloc.h>
#include <linux/coda.h>
#include <linux/coda_linux.h>
#include <linux/coda_psdev.h>
#include <linux/coda_fs_i.h>
#include <linux/coda_cache.h>
#include "coda_int.h"
/* VFS super_block ops */
static void coda_clear_inode(struct inode *);
static void coda_put_super(struct super_block *);
static int coda_statfs(struct dentry *dentry, struct kstatfs *buf);
static struct kmem_cache * coda_inode_cachep;
static struct inode *coda_alloc_inode(struct super_block *sb)
{
struct coda_inode_info *ei;
ei = (struct coda_inode_info *)kmem_cache_alloc(coda_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
memset(&ei->c_fid, 0, sizeof(struct CodaFid));
ei->c_flags = 0;
ei->c_uid = 0;
ei->c_cached_perm = 0;
return &ei->vfs_inode;
}
static void coda_destroy_inode(struct inode *inode)
{
kmem_cache_free(coda_inode_cachep, ITOC(inode));
}
static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
{
struct coda_inode_info *ei = (struct coda_inode_info *) foo;
inode_init_once(&ei->vfs_inode);
}
int coda_init_inodecache(void)
{
coda_inode_cachep = kmem_cache_create("coda_inode_cache",
sizeof(struct coda_inode_info),
0, SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
init_once);
if (coda_inode_cachep == NULL)
return -ENOMEM;
return 0;
}
void coda_destroy_inodecache(void)
{
kmem_cache_destroy(coda_inode_cachep);
}
static int coda_remount(struct super_block *sb, int *flags, char *data)
{
*flags |= MS_NOATIME;
return 0;
}
/* exported operations */
static const struct super_operations coda_super_operations =
{
.alloc_inode = coda_alloc_inode,
.destroy_inode = coda_destroy_inode,
.clear_inode = coda_clear_inode,
.put_super = coda_put_super,
.statfs = coda_statfs,
.remount_fs = coda_remount,
};
static int get_device_index(struct coda_mount_data *data)
{
struct file *file;
struct inode *inode;
int idx;
if(data == NULL) {
printk("coda_read_super: Bad mount data\n");
return -1;
}
if(data->version != CODA_MOUNT_VERSION) {
printk("coda_read_super: Bad mount version\n");
return -1;
}
file = fget(data->fd);
inode = NULL;
if(file)
inode = file->f_path.dentry->d_inode;
if(!inode || !S_ISCHR(inode->i_mode) ||
imajor(inode) != CODA_PSDEV_MAJOR) {
if(file)
fput(file);
printk("coda_read_super: Bad file\n");
return -1;
}
idx = iminor(inode);
fput(file);
if(idx < 0 || idx >= MAX_CODADEVS) {
printk("coda_read_super: Bad minor number\n");
return -1;
}
return idx;
}
static int coda_fill_super(struct super_block *sb, void *data, int silent)
{
struct inode *root = NULL;
struct venus_comm *vc = NULL;
struct CodaFid fid;
int error;
int idx;
idx = get_device_index((struct coda_mount_data *) data);
/* Ignore errors in data, for backward compatibility */
if(idx == -1)
idx = 0;
printk(KERN_INFO "coda_read_super: device index: %i\n", idx);
vc = &coda_comms[idx];
if (!vc->vc_inuse) {
printk("coda_read_super: No pseudo device\n");
return -EINVAL;
}
if ( vc->vc_sb ) {
printk("coda_read_super: Device already mounted\n");
return -EBUSY;
}
vc->vc_sb = sb;
sb->s_fs_info = vc;
sb->s_flags |= MS_NOATIME;
sb->s_blocksize = 4096; /* XXXXX what do we put here?? */
sb->s_blocksize_bits = 12;
sb->s_magic = CODA_SUPER_MAGIC;
sb->s_op = &coda_super_operations;
/* get root fid from Venus: this needs the root inode */
error = venus_rootfid(sb, &fid);
if ( error ) {
printk("coda_read_super: coda_get_rootfid failed with %d\n",
error);
goto error;
}
printk("coda_read_super: rootfid is %s\n", coda_f2s(&fid));
/* make root inode */
error = coda_cnode_make(&root, &fid, sb);
if ( error || !root ) {
printk("Failure of coda_cnode_make for root: error %d\n", error);
goto error;
}
printk("coda_read_super: rootinode is %ld dev %s\n",
root->i_ino, root->i_sb->s_id);
sb->s_root = d_alloc_root(root);
if (!sb->s_root)
goto error;
return 0;
error:
if (root)
iput(root);
if (vc)
vc->vc_sb = NULL;
return -EINVAL;
}
static void coda_put_super(struct super_block *sb)
{
coda_vcp(sb)->vc_sb = NULL;
sb->s_fs_info = NULL;
printk("Coda: Bye bye.\n");
}
static void coda_clear_inode(struct inode *inode)
{
coda_cache_clear_inode(inode);
}
int coda_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
{
int err = coda_revalidate_inode(dentry);
if (!err)
generic_fillattr(dentry->d_inode, stat);
return err;
}
int coda_setattr(struct dentry *de, struct iattr *iattr)
{
struct inode *inode = de->d_inode;
struct coda_vattr vattr;
int error;
lock_kernel();
memset(&vattr, 0, sizeof(vattr));
inode->i_ctime = CURRENT_TIME_SEC;
coda_iattr_to_vattr(iattr, &vattr);
vattr.va_type = C_VNON; /* cannot set type */
/* Venus is responsible for truncating the container-file!!! */
error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr);
if ( !error ) {
coda_vattr_to_iattr(inode, &vattr);
coda_cache_clear_inode(inode);
}
unlock_kernel();
return error;
}
const struct inode_operations coda_file_inode_operations = {
.permission = coda_permission,
.getattr = coda_getattr,
.setattr = coda_setattr,
};
static int coda_statfs(struct dentry *dentry, struct kstatfs *buf)
{
int error;
lock_kernel();
error = venus_statfs(dentry, buf);
unlock_kernel();
if (error) {
/* fake something like AFS does */
buf->f_blocks = 9000000;
buf->f_bfree = 9000000;
buf->f_bavail = 9000000;
buf->f_files = 9000000;
buf->f_ffree = 9000000;
}
/* and fill in the rest */
buf->f_type = CODA_SUPER_MAGIC;
buf->f_bsize = 4096;
buf->f_namelen = CODA_MAXNAMLEN;
return 0;
}
/* init_coda: used by filesystems.c to register coda */
static int coda_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
return get_sb_nodev(fs_type, flags, data, coda_fill_super, mnt);
}
struct file_system_type coda_fs_type = {
.owner = THIS_MODULE,
.name = "coda",
.get_sb = coda_get_sb,
.kill_sb = kill_anon_super,
.fs_flags = FS_BINARY_MOUNTDATA,
};