[hcoop/debian/openafs.git] / src / afs / LINUX / osi_vfsops.c

/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 * 
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

/*
 * VFS operations for Linux
 *
 * super_block operations should return negated errno to Linux.
 */
#include <afsconfig.h>
#include "afs/param.h"


#define __NO_VERSION__		/* don't define kernel_version in module.h */
#include <linux/module.h> /* early to avoid printf->printk mapping */
#include "afs/sysincludes.h"
#include "afsincludes.h"
#include "afs/afs_stats.h"

#include "osi_compat.h"

struct vcache *afs_globalVp = 0;
struct vfs *afs_globalVFS = 0;
struct vfsmount *afs_cacheMnt;
int afs_was_mounted = 0;	/* Used to force reload if mount/unmount/mount */

extern struct super_operations afs_sops;
#if !defined(AFS_NONFSTRANS)
extern struct export_operations afs_export_ops;
#endif
extern afs_rwlock_t afs_xvcache;
extern struct afs_q VLRU;

extern struct dentry_operations afs_dentry_operations;

/* Forward declarations */
static int afs_root(struct super_block *afsp);
int afs_fill_super(struct super_block *sb, void *data, int silent);


/*
 * afs_mount (2.6.37+) and afs_get_sb (2.6.36-) are the entry
 * points from the vfs when mounting afs.  The super block
 * structure is setup in the afs_fill_super callback function.
 */

#if defined(STRUCT_FILE_SYSTEM_TYPE_HAS_MOUNT)
static struct dentry *
afs_mount(struct file_system_type *fs_type, int flags,
           const char *dev_name, void *data) {
    return mount_nodev(fs_type, flags, data, afs_fill_super);
}
#elif defined(GET_SB_HAS_STRUCT_VFSMOUNT)
static int
afs_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, afs_fill_super, mnt);
}
#else
static struct super_block *
afs_get_sb(struct file_system_type *fs_type, int flags,
	   const char *dev_name, void *data) {
    return get_sb_nodev(fs_type, flags, data, afs_fill_super);
}
#endif

struct file_system_type afs_fs_type = {
    .owner = THIS_MODULE,
    .name = "afs",
#if defined(STRUCT_FILE_SYSTEM_TYPE_HAS_MOUNT)
    .mount = afs_mount,
#else
    .get_sb = afs_get_sb,
#endif
    .kill_sb = kill_anon_super,
    .fs_flags = FS_BINARY_MOUNTDATA,
};

struct backing_dev_info *afs_backing_dev_info;

int
afs_fill_super(struct super_block *sb, void *data, int silent)
{
    int code = 0;
#if defined(HAVE_LINUX_BDI_INIT)
    int bdi_init_done = 0;
#endif

    AFS_GLOCK();
    if (afs_was_mounted) {
	printf
	    ("You must reload the AFS kernel extensions before remounting AFS.\n");
	AFS_GUNLOCK();
	return -EINVAL;
    }
    afs_was_mounted = 1;

    /* Set basics of super_block */
   __module_get(THIS_MODULE);

    afs_globalVFS = sb;
#if defined(SB_NOATIME)
    sb->s_flags |= SB_NOATIME;
#else
    sb->s_flags |= MS_NOATIME;
#endif
    sb->s_blocksize = 1024;
    sb->s_blocksize_bits = 10;
    sb->s_magic = AFS_VFSMAGIC;
    sb->s_op = &afs_sops;	/* Super block (vfs) ops */

#if defined(STRUCT_SUPER_BLOCK_HAS_S_D_OP)
    sb->s_d_op = &afs_dentry_operations;
#endif
#if defined(HAVE_LINUX_SUPER_SETUP_BDI)
    code = super_setup_bdi(sb);
    if (code)
        goto out;
    sb->s_bdi->name = "openafs";
    sb->s_bdi->ra_pages = 32;
#else
    /* used for inodes backing_dev_info field, also */
    afs_backing_dev_info = kzalloc(sizeof(struct backing_dev_info), GFP_NOFS);
#if defined(HAVE_LINUX_BDI_INIT)
    code = bdi_init(afs_backing_dev_info);
    if (code)
	goto out;
    bdi_init_done = 1;
#endif
#if defined(STRUCT_BACKING_DEV_INFO_HAS_NAME)
    afs_backing_dev_info->name = "openafs";
#endif
    afs_backing_dev_info->ra_pages = 32;
#if defined (STRUCT_SUPER_BLOCK_HAS_S_BDI)
    sb->s_bdi = afs_backing_dev_info;
    /* The name specified here will appear in the flushing thread name - flush-afs */
    bdi_register(afs_backing_dev_info, NULL, "afs");
#endif
#endif /* HAVE_LINUX_SUPER_SETUP_BDI */
#if !defined(AFS_NONFSTRANS)
    sb->s_export_op = &afs_export_ops;
#endif
#if defined(MAX_NON_LFS)
#ifdef AFS_64BIT_CLIENT
#if !defined(MAX_LFS_FILESIZE)
#if BITS_PER_LONG==32
#define MAX_LFS_FILESIZE (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 
#elif BITS_PER_LONG==64
#define MAX_LFS_FILESIZE 0x7fffffffffffffff
#endif
#endif
    sb->s_maxbytes = MAX_LFS_FILESIZE;
#else
    sb->s_maxbytes = MAX_NON_LFS;
#endif
#endif
    code = afs_root(sb);
out:
    if (code) {
	afs_globalVFS = NULL;
	afs_FlushAllVCaches();
#if defined(HAVE_LINUX_BDI_INIT)
	if (bdi_init_done)
	    bdi_destroy(afs_backing_dev_info);
#endif
#if !defined(HAVE_LINUX_SUPER_SETUP_BDI)
	kfree(afs_backing_dev_info);
#endif
        module_put(THIS_MODULE);
    }

    AFS_GUNLOCK();
    return code ? -EINVAL : 0;
}


/* afs_root - stat the root of the file system. AFS global held on entry. */
static int
afs_root(struct super_block *afsp)
{
    afs_int32 code = 0;
    struct vcache *tvp = 0;

    AFS_STATCNT(afs_root);
    if (afs_globalVp && (afs_globalVp->f.states & CStatd)) {
	tvp = afs_globalVp;
    } else {
	struct vrequest *treq = NULL;
	cred_t *credp = crref();

	if (afs_globalVp) {
	    afs_PutVCache(afs_globalVp);
	    afs_globalVp = NULL;
	}

	if (!(code = afs_CreateReq(&treq, credp)) && !(code = afs_CheckInit())) {
	    tvp = afs_GetVCache(&afs_rootFid, treq, NULL, NULL);
	    if (tvp) {
		struct inode *ip = AFSTOV(tvp);
		struct vattr *vattr = NULL;

		code = afs_CreateAttr(&vattr);
		if (!code) {
		    afs_getattr(tvp, vattr, credp);
		    afs_fill_inode(ip, vattr);

		    /* setup super_block and mount point inode. */
		    afs_globalVp = tvp;
#if defined(HAVE_LINUX_D_MAKE_ROOT)
		    afsp->s_root = d_make_root(ip);
#else
		    afsp->s_root = d_alloc_root(ip);
#endif
#if !defined(STRUCT_SUPER_BLOCK_HAS_S_D_OP)
		    afsp->s_root->d_op = &afs_dentry_operations;
#endif
		    afs_DestroyAttr(vattr);
		}
	    } else
		code = EIO;
	}
	crfree(credp);
	afs_DestroyReq(treq);
    }

    afs_Trace2(afs_iclSetp, CM_TRACE_VFSROOT, ICL_TYPE_POINTER, afs_globalVp,
	       ICL_TYPE_INT32, code);
    return code;
}

/* super_operations */

#if defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE)
static afs_kmem_cache_t *afs_inode_cachep;

static struct inode *
afs_alloc_inode(struct super_block *sb)
{
    struct vcache *vcp;

    vcp = (struct vcache *) kmem_cache_alloc(afs_inode_cachep, KALLOC_TYPE);
    if (!vcp)
	return NULL;

    return AFSTOV(vcp);
}

static void
afs_destroy_inode(struct inode *inode)
{
    kmem_cache_free(afs_inode_cachep, inode);
}

void
init_once(void * foo)
{
    struct vcache *vcp = (struct vcache *) foo;

    inode_init_once(AFSTOV(vcp));
}

int
afs_init_inodecache(void)
{
#if defined(KMEM_CACHE_TAKES_DTOR)
    afs_inode_cachep = kmem_cache_create("afs_inode_cache",
		sizeof(struct vcache), 0,
		SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT, init_once_func, NULL);
#else
    afs_inode_cachep = kmem_cache_create("afs_inode_cache",
		sizeof(struct vcache), 0,
		SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT, init_once_func);
#endif
    if (afs_inode_cachep == NULL)
	return -ENOMEM;
    return 0;
}

void
afs_destroy_inodecache(void)
{
    if (afs_inode_cachep)
	(void) kmem_cache_destroy(afs_inode_cachep);
}
#else
int
afs_init_inodecache(void)
{
    return 0;
}

void
afs_destroy_inodecache(void)
{
    return;
}
#endif

#if defined(STRUCT_SUPER_OPERATIONS_HAS_EVICT_INODE)
static void
afs_evict_inode(struct inode *ip)
{
    struct vcache *vcp = VTOAFS(ip);

    if (vcp->vlruq.prev || vcp->vlruq.next)
	osi_Panic("inode freed while on LRU");
    if (vcp->hnext)
	osi_Panic("inode freed while still hashed");

    truncate_inode_pages(&ip->i_data, 0);
#if defined(HAVE_LINUX_CLEAR_INODE)
    clear_inode(ip);
#else
    end_writeback(ip);
#endif

#if !defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE)
    afs_osi_Free(ip->u.generic_ip, sizeof(struct vcache));
#endif
}
#else
static void
afs_clear_inode(struct inode *ip)
{
    struct vcache *vcp = VTOAFS(ip);

    if (vcp->vlruq.prev || vcp->vlruq.next)
	osi_Panic("inode freed while on LRU");
    if (vcp->hnext)
	osi_Panic("inode freed while still hashed");

#if !defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE)
    afs_osi_Free(ip->u.generic_ip, sizeof(struct vcache));
#endif
}
#endif

/* afs_put_super
 * Called from unmount to release super_block. */
static void
afs_put_super(struct super_block *sbp)
{
    AFS_GLOCK();
    AFS_STATCNT(afs_unmount);

    afs_globalVFS = 0;
    afs_globalVp = 0;

    afs_shutdown();
    mntput(afs_cacheMnt);

    osi_linux_verify_alloced_memory();
#if defined(HAVE_LINUX_BDI_INIT)
    bdi_destroy(afs_backing_dev_info);
#endif
    kfree(afs_backing_dev_info);
    AFS_GUNLOCK();

    sbp->s_dev = 0;
    module_put(THIS_MODULE);
}


/* afs_statfs
 * statp is in user space, so we need to cobble together a statfs, then
 * copy it.
 */
int
#if defined(STATFS_TAKES_DENTRY)
afs_statfs(struct dentry *dentry, struct kstatfs *statp)
#else
afs_statfs(struct super_block *sbp, struct kstatfs *statp)
#endif
{
    memset(statp, 0, sizeof(*statp));

    AFS_STATCNT(afs_statfs);

    /* hardcode in case that which is giveth is taken away */
    statp->f_type = 0x5346414F;
#if defined(STATFS_TAKES_DENTRY)
    statp->f_bsize = dentry->d_sb->s_blocksize;
#else
    statp->f_bsize = sbp->s_blocksize;
#endif
    statp->f_blocks = statp->f_bfree = statp->f_bavail = statp->f_files =
	statp->f_ffree = AFS_VFS_FAKEFREE;
    statp->f_fsid.val[0] = AFS_VFSMAGIC;
    statp->f_fsid.val[1] = AFS_VFSFSID;
    statp->f_namelen = 256;

    return 0;
}

struct super_operations afs_sops = {
#if defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE)
  .alloc_inode =	afs_alloc_inode,
  .destroy_inode =	afs_destroy_inode,
#endif
#if defined(STRUCT_SUPER_OPERATIONS_HAS_EVICT_INODE)
  .evict_inode =	afs_evict_inode,
#else
  .clear_inode =	afs_clear_inode,
#endif
  .put_super =		afs_put_super,
  .statfs =		afs_statfs,
};
Commit	Line	Data
805e021f CE	1	/*
	2	* Copyright 2000, International Business Machines Corporation and others.
	3	* All Rights Reserved.
	4	*
	5	* This software has been released under the terms of the IBM Public
	6	* License. For details, see the LICENSE file in the top-level source
	7	* directory or online at http://www.openafs.org/dl/license10.html
	8	*/
	9
	10	/*
	11	* VFS operations for Linux
	12	*
	13	* super_block operations should return negated errno to Linux.
	14	*/
	15	#include <afsconfig.h>
	16	#include "afs/param.h"
	17
	18
	19	#define __NO_VERSION__ /* don't define kernel_version in module.h */
	20	#include <linux/module.h> /* early to avoid printf->printk mapping */
	21	#include "afs/sysincludes.h"
	22	#include "afsincludes.h"
	23	#include "afs/afs_stats.h"
	24
	25	#include "osi_compat.h"
	26
	27	struct vcache *afs_globalVp = 0;
	28	struct vfs *afs_globalVFS = 0;
	29	struct vfsmount *afs_cacheMnt;
	30	int afs_was_mounted = 0; /* Used to force reload if mount/unmount/mount */
	31
	32	extern struct super_operations afs_sops;
	33	#if !defined(AFS_NONFSTRANS)
	34	extern struct export_operations afs_export_ops;
	35	#endif
	36	extern afs_rwlock_t afs_xvcache;
	37	extern struct afs_q VLRU;
	38
	39	extern struct dentry_operations afs_dentry_operations;
	40
	41	/* Forward declarations */
	42	static int afs_root(struct super_block *afsp);
	43	int afs_fill_super(struct super_block sb, void data, int silent);
	44
	45
	46	/*
	47	* afs_mount (2.6.37+) and afs_get_sb (2.6.36-) are the entry
	48	* points from the vfs when mounting afs. The super block
	49	* structure is setup in the afs_fill_super callback function.
	50	*/
	51
	52	#if defined(STRUCT_FILE_SYSTEM_TYPE_HAS_MOUNT)
	53	static struct dentry *
	54	afs_mount(struct file_system_type *fs_type, int flags,
	55	const char dev_name, void data) {
	56	return mount_nodev(fs_type, flags, data, afs_fill_super);
	57	}
	58	#elif defined(GET_SB_HAS_STRUCT_VFSMOUNT)
	59	static int
	60	afs_get_sb(struct file_system_type *fs_type, int flags,
	61	const char dev_name, void data, struct vfsmount *mnt) {
	62	return get_sb_nodev(fs_type, flags, data, afs_fill_super, mnt);
	63	}
	64	#else
65	static struct super_block *
66	afs_get_sb(struct file_system_type *fs_type, int flags,
67	const char dev_name, void data) {
68	return get_sb_nodev(fs_type, flags, data, afs_fill_super);
69	}
70	#endif
71
72	struct file_system_type afs_fs_type = {
73	.owner = THIS_MODULE,
74	.name = "afs",
75	#if defined(STRUCT_FILE_SYSTEM_TYPE_HAS_MOUNT)
76	.mount = afs_mount,
77	#else
78	.get_sb = afs_get_sb,
79	#endif
80	.kill_sb = kill_anon_super,
81	.fs_flags = FS_BINARY_MOUNTDATA,
82	};
83
84	struct backing_dev_info *afs_backing_dev_info;
85
86	int
87	afs_fill_super(struct super_block sb, void data, int silent)
88	{
89	int code = 0;
90	#if defined(HAVE_LINUX_BDI_INIT)
91	int bdi_init_done = 0;
92	#endif
93
94	AFS_GLOCK();
95	if (afs_was_mounted) {
96	printf
97	("You must reload the AFS kernel extensions before remounting AFS.\n");
98	AFS_GUNLOCK();
99	return -EINVAL;
100	}
101	afs_was_mounted = 1;
102
103	/* Set basics of super_block */
104	__module_get(THIS_MODULE);
105
106	afs_globalVFS = sb;
107	#if defined(SB_NOATIME)
108	sb->s_flags \|= SB_NOATIME;
109	#else
110	sb->s_flags \|= MS_NOATIME;
111	#endif
112	sb->s_blocksize = 1024;
113	sb->s_blocksize_bits = 10;
114	sb->s_magic = AFS_VFSMAGIC;
115	sb->s_op = &afs_sops; /* Super block (vfs) ops */
116
117	#if defined(STRUCT_SUPER_BLOCK_HAS_S_D_OP)
118	sb->s_d_op = &afs_dentry_operations;
119	#endif
120	#if defined(HAVE_LINUX_SUPER_SETUP_BDI)
121	code = super_setup_bdi(sb);
122	if (code)
123	goto out;
124	sb->s_bdi->name = "openafs";
125	sb->s_bdi->ra_pages = 32;
126	#else
127	/* used for inodes backing_dev_info field, also */
128	afs_backing_dev_info = kzalloc(sizeof(struct backing_dev_info), GFP_NOFS);
129	#if defined(HAVE_LINUX_BDI_INIT)
130	code = bdi_init(afs_backing_dev_info);
131	if (code)
132	goto out;
133	bdi_init_done = 1;
134	#endif
135	#if defined(STRUCT_BACKING_DEV_INFO_HAS_NAME)
136	afs_backing_dev_info->name = "openafs";
137	#endif
138	afs_backing_dev_info->ra_pages = 32;
139	#if defined (STRUCT_SUPER_BLOCK_HAS_S_BDI)
140	sb->s_bdi = afs_backing_dev_info;
141	/* The name specified here will appear in the flushing thread name - flush-afs */
142	bdi_register(afs_backing_dev_info, NULL, "afs");
143	#endif
144	#endif /* HAVE_LINUX_SUPER_SETUP_BDI */
145	#if !defined(AFS_NONFSTRANS)
146	sb->s_export_op = &afs_export_ops;
147	#endif
148	#if defined(MAX_NON_LFS)
149	#ifdef AFS_64BIT_CLIENT
150	#if !defined(MAX_LFS_FILESIZE)
151	#if BITS_PER_LONG==32
152	#define MAX_LFS_FILESIZE (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
153	#elif BITS_PER_LONG==64
154	#define MAX_LFS_FILESIZE 0x7fffffffffffffff
155	#endif
156	#endif
157	sb->s_maxbytes = MAX_LFS_FILESIZE;
158	#else
159	sb->s_maxbytes = MAX_NON_LFS;
160	#endif
161	#endif
162	code = afs_root(sb);
163	out:
164	if (code) {
165	afs_globalVFS = NULL;
166	afs_FlushAllVCaches();
167	#if defined(HAVE_LINUX_BDI_INIT)
168	if (bdi_init_done)
169	bdi_destroy(afs_backing_dev_info);
170	#endif
171	#if !defined(HAVE_LINUX_SUPER_SETUP_BDI)
172	kfree(afs_backing_dev_info);
173	#endif
174	module_put(THIS_MODULE);
175	}
176
177	AFS_GUNLOCK();
178	return code ? -EINVAL : 0;
179	}
180
181
182	/* afs_root - stat the root of the file system. AFS global held on entry. */
183	static int
184	afs_root(struct super_block *afsp)
185	{
186	afs_int32 code = 0;
187	struct vcache *tvp = 0;
188
189	AFS_STATCNT(afs_root);
190	if (afs_globalVp && (afs_globalVp->f.states & CStatd)) {
191	tvp = afs_globalVp;
192	} else {
193	struct vrequest *treq = NULL;
194	cred_t *credp = crref();
195
196	if (afs_globalVp) {
197	afs_PutVCache(afs_globalVp);
198	afs_globalVp = NULL;
199	}
200
201	if (!(code = afs_CreateReq(&treq, credp)) && !(code = afs_CheckInit())) {
202	tvp = afs_GetVCache(&afs_rootFid, treq, NULL, NULL);
203	if (tvp) {
204	struct inode *ip = AFSTOV(tvp);
205	struct vattr *vattr = NULL;
206
207	code = afs_CreateAttr(&vattr);
208	if (!code) {
209	afs_getattr(tvp, vattr, credp);
210	afs_fill_inode(ip, vattr);
211
212	/* setup super_block and mount point inode. */
213	afs_globalVp = tvp;
214	#if defined(HAVE_LINUX_D_MAKE_ROOT)
215	afsp->s_root = d_make_root(ip);
216	#else
217	afsp->s_root = d_alloc_root(ip);
218	#endif
219	#if !defined(STRUCT_SUPER_BLOCK_HAS_S_D_OP)
220	afsp->s_root->d_op = &afs_dentry_operations;
221	#endif
222	afs_DestroyAttr(vattr);
223	}
224	} else
225	code = EIO;
226	}
227	crfree(credp);
228	afs_DestroyReq(treq);
229	}
230
231	afs_Trace2(afs_iclSetp, CM_TRACE_VFSROOT, ICL_TYPE_POINTER, afs_globalVp,
232	ICL_TYPE_INT32, code);
233	return code;
234	}
235
236	/* super_operations */
237
238	#if defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE)
239	static afs_kmem_cache_t *afs_inode_cachep;
240
241	static struct inode *
242	afs_alloc_inode(struct super_block *sb)
243	{
244	struct vcache *vcp;
245
246	vcp = (struct vcache *) kmem_cache_alloc(afs_inode_cachep, KALLOC_TYPE);
247	if (!vcp)
248	return NULL;
249
250	return AFSTOV(vcp);
251	}
252
253	static void
254	afs_destroy_inode(struct inode *inode)
255	{
256	kmem_cache_free(afs_inode_cachep, inode);
257	}
258
259	void
260	init_once(void * foo)
261	{
262	struct vcache vcp = (struct vcache ) foo;
263
264	inode_init_once(AFSTOV(vcp));
265	}
266
267	int
268	afs_init_inodecache(void)
269	{
270	#if defined(KMEM_CACHE_TAKES_DTOR)
271	afs_inode_cachep = kmem_cache_create("afs_inode_cache",
272	sizeof(struct vcache), 0,
273	SLAB_HWCACHE_ALIGN \| SLAB_RECLAIM_ACCOUNT, init_once_func, NULL);
274	#else
275	afs_inode_cachep = kmem_cache_create("afs_inode_cache",
276	sizeof(struct vcache), 0,
277	SLAB_HWCACHE_ALIGN \| SLAB_RECLAIM_ACCOUNT, init_once_func);
278	#endif
279	if (afs_inode_cachep == NULL)
280	return -ENOMEM;
281	return 0;
282	}
283
284	void
285	afs_destroy_inodecache(void)
286	{
287	if (afs_inode_cachep)
288	(void) kmem_cache_destroy(afs_inode_cachep);
289	}
290	#else
291	int
292	afs_init_inodecache(void)
293	{
294	return 0;
295	}
296
297	void
298	afs_destroy_inodecache(void)
299	{
300	return;
301	}
302	#endif
303
304	#if defined(STRUCT_SUPER_OPERATIONS_HAS_EVICT_INODE)
305	static void
306	afs_evict_inode(struct inode *ip)
307	{
308	struct vcache *vcp = VTOAFS(ip);
309
310	if (vcp->vlruq.prev \|\| vcp->vlruq.next)
311	osi_Panic("inode freed while on LRU");
312	if (vcp->hnext)
313	osi_Panic("inode freed while still hashed");
314
315	truncate_inode_pages(&ip->i_data, 0);
316	#if defined(HAVE_LINUX_CLEAR_INODE)
317	clear_inode(ip);
318	#else
319	end_writeback(ip);
320	#endif
321
322	#if !defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE)
323	afs_osi_Free(ip->u.generic_ip, sizeof(struct vcache));
324	#endif
325	}
326	#else
327	static void
328	afs_clear_inode(struct inode *ip)
329	{
330	struct vcache *vcp = VTOAFS(ip);
331
332	if (vcp->vlruq.prev \|\| vcp->vlruq.next)
333	osi_Panic("inode freed while on LRU");
334	if (vcp->hnext)
335	osi_Panic("inode freed while still hashed");
336
337	#if !defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE)
338	afs_osi_Free(ip->u.generic_ip, sizeof(struct vcache));
339	#endif
340	}
341	#endif
342
343	/* afs_put_super
344	* Called from unmount to release super_block. */
345	static void
346	afs_put_super(struct super_block *sbp)
347	{
348	AFS_GLOCK();
349	AFS_STATCNT(afs_unmount);
350
351	afs_globalVFS = 0;
352	afs_globalVp = 0;
353
354	afs_shutdown();
355	mntput(afs_cacheMnt);
356
357	osi_linux_verify_alloced_memory();
358	#if defined(HAVE_LINUX_BDI_INIT)
359	bdi_destroy(afs_backing_dev_info);
360	#endif
361	kfree(afs_backing_dev_info);
362	AFS_GUNLOCK();
363
364	sbp->s_dev = 0;
365	module_put(THIS_MODULE);
366	}
367
368
369	/* afs_statfs
370	* statp is in user space, so we need to cobble together a statfs, then
371	* copy it.
372	*/
373	int
374	#if defined(STATFS_TAKES_DENTRY)
375	afs_statfs(struct dentry dentry, struct kstatfs statp)
376	#else
377	afs_statfs(struct super_block sbp, struct kstatfs statp)
378	#endif
379	{
380	memset(statp, 0, sizeof(*statp));
381
382	AFS_STATCNT(afs_statfs);
383
384	/* hardcode in case that which is giveth is taken away */
385	statp->f_type = 0x5346414F;
386	#if defined(STATFS_TAKES_DENTRY)
387	statp->f_bsize = dentry->d_sb->s_blocksize;
388	#else
389	statp->f_bsize = sbp->s_blocksize;
390	#endif
391	statp->f_blocks = statp->f_bfree = statp->f_bavail = statp->f_files =
392	statp->f_ffree = AFS_VFS_FAKEFREE;
393	statp->f_fsid.val[0] = AFS_VFSMAGIC;
394	statp->f_fsid.val[1] = AFS_VFSFSID;
395	statp->f_namelen = 256;
396
397	return 0;
398	}
399
400	struct super_operations afs_sops = {
401	#if defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE)
402	.alloc_inode = afs_alloc_inode,
403	.destroy_inode = afs_destroy_inode,
404	#endif
405	#if defined(STRUCT_SUPER_OPERATIONS_HAS_EVICT_INODE)
406	.evict_inode = afs_evict_inode,
407	#else
408	.clear_inode = afs_clear_inode,
409	#endif
410	.put_super = afs_put_super,
411	.statfs = afs_statfs,
412	};