Merge home.transmeta.com:/home/torvalds/v2.5/knfsd

into home.transmeta.com:/home/torvalds/v2.5/linux

fs/fat/inode.c

@@ -430,12 +430,13 @@ struct dentry *fat_fh_to_dentry(struct super_block *sb, __u32 *fh,
 	struct dentry *result;
 
 	if (fhtype != 3)
-		return NULL;
+		return ERR_PTR(-ESTALE);
 	if (len < 5)
-		return NULL;
-	if (parent)
-		return NULL; /* We cannot find the parent,
+		return ERR_PTR(-ESTALE);
+	/* We cannot find the parent,
 	   It better just *be* there */
+	if (parent)
+		return ERR_PTR(-ESTALE);
 
 	inode = iget(sb, fh[0]);
 	if (!inode || is_bad_inode(inode) ||

fs/filesystems.c

@@ -3,7 +3,7 @@
  *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
- *  table of configured filesystems
+ *  nfsservctl system-call when nfsd is not compiled in.
  */
 
 #include <linux/config.h>
@@ -14,28 +14,28 @@
 #include <linux/nfsd/interface.h>
 #include <linux/linkage.h>
 
-#if defined(CONFIG_NFSD_MODULE)
-struct nfsd_linkage *nfsd_linkage = NULL;
+#if ! defined(CONFIG_NFSD)
+struct nfsd_linkage *nfsd_linkage;
 
 long
 asmlinkage sys_nfsservctl(int cmd, void *argp, void *resp)
 {
 	int ret = -ENOSYS;
 	
+#if defined(CONFIG_MODULES)
 	lock_kernel();
 
 	if (nfsd_linkage ||
-	    (request_module ("nfsd") == 0 && nfsd_linkage))
+	    (request_module ("nfsd") == 0 && nfsd_linkage)) {
+		__MOD_INC_USE_COUNT(nfsd_linkage->owner);
+		unlock_kernel();
 		ret = nfsd_linkage->do_nfsservctl(cmd, argp, resp);
-
+		__MOD_DEC_USE_COUNT(nfsd_linkage->owner);
+	} else
 		unlock_kernel();
+#endif
 	return ret;
 }
 EXPORT_SYMBOL(nfsd_linkage);
 
-#elif ! defined (CONFIG_NFSD)
-asmlinkage int sys_nfsservctl(int cmd, void *argp, void *resp)
-{
-	return -ENOSYS;
-}
 #endif /* CONFIG_NFSD */

fs/nfsd/export.c

@@ -59,7 +59,6 @@ struct svc_clnthash {
 };
 static struct svc_clnthash *	clnt_hash[CLIENT_HASHMAX];
 static svc_client *		clients;
-static int			initialized;
 
 static int			hash_lock;
 static int			want_lock;
@@ -73,18 +72,17 @@ svc_export *
 exp_get(svc_client *clp, kdev_t dev, ino_t ino)
 {
 	struct list_head *head, *p;
-	svc_export *exp = NULL;
 	
 	if (!clp)
 		return NULL;
 
 	head = &clp->cl_export[EXPORT_HASH(dev)];
 	list_for_each(p, head) {
-		exp = list_entry(p, svc_export, ex_hash);
+		svc_export *exp = list_entry(p, svc_export, ex_hash);
 		if (exp->ex_ino == ino && kdev_same(exp->ex_dev, dev))
-			break;
-	}
 			return exp;
+	}
+	return NULL;
 }
 
 svc_export *
@@ -92,18 +90,17 @@ exp_get_by_name(svc_client *clp, struct vfsmount *mnt, struct dentry *dentry)
 {
 	struct list_head *head, *p;
 	int hash = EXPORT_HASH(mnt->mnt_sb->s_dev);
-	svc_export *exp = NULL;
 
 	if (!clp)
 		return NULL;
 
 	head = &clp->cl_export[hash];
 	list_for_each(p, head) {
-		exp = list_entry(p, svc_export, ex_hash);
+		svc_export *exp = list_entry(p, svc_export, ex_hash);
 		if (exp->ex_dentry == dentry && exp->ex_mnt == mnt)
 			break;
 	}
-	return exp;
+	return NULL;
 }
 
 /*
@@ -114,14 +111,13 @@ exp_parent(svc_client *clp, struct super_block *sb, struct dentry *dentry)
 {
 	struct list_head *head = &clp->cl_export[EXPORT_HASH(sb->s_dev)];
 	struct list_head *p;
-	svc_export *exp = NULL;
 
 	list_for_each(p, head) {
-		exp = list_entry(p, svc_export, ex_hash);
+		svc_export *exp = list_entry(p, svc_export, ex_hash);
 		if (is_subdir(dentry, exp->ex_dentry))
-			break;
-	}
 			return exp;
+	}
+	return NULL;
 }
 
 /*
@@ -134,16 +130,15 @@ exp_child(svc_client *clp, struct super_block *sb, struct dentry *dentry)
 {
 	struct list_head *head = &clp->cl_export[EXPORT_HASH(sb->s_dev)];
 	struct list_head *p;
-	svc_export *exp = NULL;
 	struct dentry *ndentry;
 
 	list_for_each(p, head) {
-		exp = list_entry(p, svc_export, ex_hash);
+		svc_export *exp = list_entry(p, svc_export, ex_hash);
 		ndentry = exp->ex_dentry;
 		if (ndentry && is_subdir(ndentry->d_parent, dentry))
-			break;
-	}
 			return exp;
+	}
+	return NULL;
 }
 
 /* Update parent pointers of all exports */
@@ -477,9 +472,6 @@ exp_getclient(struct sockaddr_in *sin)
 	struct svc_clnthash	**hp, **head, *tmp;
 	unsigned long		addr = sin->sin_addr.s_addr;
 
-	if (!initialized)
-		return NULL;
-
 	head = &clnt_hash[CLIENT_HASH(addr)];
 
 	for (hp = head; (tmp = *hp) != NULL; hp = &(tmp->h_next)) {
@@ -552,9 +544,10 @@ static void *e_next(struct seq_file *m, void *p, loff_t *pos)
 
 	if (p == (void *)1)
 		clp = clients;
-	else if (exp->ex_list.next == &exp->ex_client->cl_list)
+	else if (exp->ex_list.next == &exp->ex_client->cl_list) {
 		clp = exp->ex_client->cl_next;
-	else {
+		*pos += 1LL<<32;
+	} else {
 		++*pos;
 		return list_entry(exp->ex_list.next, svc_export, ex_list);
 	}
@@ -875,13 +868,11 @@ nfsd_export_init(void)
 	int		i;
 
 	dprintk("nfsd: initializing export module.\n");
-	if (initialized)
-		return;
+
 	for (i = 0; i < CLIENT_HASHMAX; i++)
 		clnt_hash[i] = NULL;
 	clients = NULL;
 
-	initialized = 1;
 }
 
 /*
@@ -893,8 +884,7 @@ nfsd_export_shutdown(void)
 	int	i;
 
 	dprintk("nfsd: shutting down export module.\n");
-	if (!initialized)
-		return;
+
 	if (exp_writelock() < 0) {
 		printk(KERN_WARNING "Weird: hashtable locked in exp_shutdown");
 		return;

fs/nfsd/nfs3proc.c

@@ -339,7 +339,7 @@ nfsd3_proc_mknod(struct svc_rqst *rqstp, struct nfsd3_mknodargs *argp,
 		    || (argp->ftype == NF3BLK && argp->major >= MAX_BLKDEV)
 		    || argp->minor > 0xFF)
 			RETURN_STATUS(nfserr_inval);
-		rdev = ((argp->major) << 8) | (argp->minor);
+		rdev = MKDEV(argp->major, argp->minor);
 	} else
 		if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
 			RETURN_STATUS(nfserr_inval);

fs/nfsd/nfsctl.c

@@ -44,8 +44,6 @@ static int	nfsctl_getfs(struct nfsctl_fsparm *, struct knfsd_fh *);
 static int	nfsctl_ugidupdate(struct nfsctl_ugidmap *data);
 #endif
 
-static int	initialized;
-
 extern struct seq_operations nfs_exports_op;
 static int exports_open(struct inode *inode, struct file *file)
 {
@@ -68,20 +66,6 @@ void proc_export_init(void)
 		entry->proc_fops =  &exports_operations;
 }
 
-/*
- * Initialize nfsd
- */
-static void
-nfsd_init(void)
-{
-	nfsd_stat_init();	/* Statistics */
-	nfsd_cache_init();	/* RPC reply cache */
-	nfsd_export_init();	/* Exports table */
-	nfsd_lockd_init();	/* lockd->nfsd callbacks */
-	proc_export_init();
-	initialized = 1;
-}
-
 static inline int
 nfsctl_svc(struct nfsctl_svc *data)
 {
@@ -203,10 +187,8 @@ asmlinkage handle_sys_nfsservctl(int cmd, void *opaque_argp, void *opaque_resp)
 	int			err;
 	int			argsize, respsize;
 
-	MOD_INC_USE_COUNT;
 	lock_kernel ();
-	if (!initialized)
-		nfsd_init();
+
 	err = -EPERM;
 	if (!capable(CAP_SYS_ADMIN)) {
 		goto done;
@@ -276,38 +258,47 @@ asmlinkage handle_sys_nfsservctl(int cmd, void *opaque_argp, void *opaque_resp)
 		kfree(res);
 
 	unlock_kernel ();
-	MOD_DEC_USE_COUNT;
 	return err;
 }
 
-#ifdef MODULE
-/* New-style module support since 2.1.18 */
 EXPORT_NO_SYMBOLS;
 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
 MODULE_LICENSE("GPL");
 
+#ifdef MODULE
 struct nfsd_linkage nfsd_linkage_s = {
 	do_nfsservctl: handle_sys_nfsservctl,
+	owner: THIS_MODULE,
 };
+#endif
 
 /*
  * Initialize the module
  */
-int
-init_module(void)
+static int __init
+nfsd_init(void)
 {
 	printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
+#ifdef MODULE
 	nfsd_linkage = &nfsd_linkage_s;
+#endif
+	nfsd_stat_init();	/* Statistics */
+	nfsd_cache_init();	/* RPC reply cache */
+	nfsd_export_init();	/* Exports table */
+	nfsd_lockd_init();	/* lockd->nfsd callbacks */
+	proc_export_init();
 	return 0;
 }
 
 /*
  * Clean up the mess before unloading the module
  */
-void
-cleanup_module(void)
+static void __exit
+nfsd_exit(void)
 {
+#ifdef MODULE
 	nfsd_linkage = NULL;
+#endif
 	nfsd_export_shutdown();
 	nfsd_cache_shutdown();
 	remove_proc_entry("fs/nfs/exports", NULL);
@@ -315,4 +306,6 @@ cleanup_module(void)
 	nfsd_stat_shutdown();
 	nfsd_lockd_shutdown();
 }
-#endif
+
+module_init(nfsd_init);
+module_exit(nfsd_exit);

fs/nfsd/vfs.c

@@ -209,36 +209,37 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
 	dentry = fhp->fh_dentry;
 	inode = dentry->d_inode;
 
-	err = inode_change_ok(inode, iap);
-	/* could be a "touch" (utimes) request where the user is not the owner but does
-	 * have write permission. In this case the user should be allowed to set
-	 * both times to the current time.  We could just assume any such SETATTR
-	 * is intended to set the times to "now", but we do a couple of simple tests
-	 * to increase our confidence.
+	/* NFSv2 does not differentiate between "set-[ac]time-to-now"
+	 * which only requires access, and "set-[ac]time-to-X" which
+	 * requires ownership.
+	 * So if it looks like it might be "set both to the same time which
+	 * is close to now", and if inode_change_ok fails, then we
+	 * convert to "set to now" instead of "set to explicit time"
+	 *
+	 * We only call inode_change_ok as the last test as technically
+	 * it is not an interface that we should be using.  It is only
+	 * valid if the filesystem does not define it's own i_op->setattr.
 	 */
 #define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET)
 #define	MAX_TOUCH_TIME_ERROR (30*60)
-	if (err
-	    && (iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET
+	if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET
 	    && iap->ia_mtime == iap->ia_atime
 	    ) {
-	    /* looks good.  now just make sure time is in the right ballpark.
-	     * solaris, at least, doesn't seem to care what the time request is
+	    /* Looks probable.  Now just make sure time is in the right ballpark.
+	     * Solaris, at least, doesn't seem to care what the time request is.
+	     * We require it be within 30 minutes of now.
 	     */
 	    time_t delta = iap->ia_atime - CURRENT_TIME;
 	    if (delta<0) delta = -delta;
-	    if (delta < MAX_TOUCH_TIME_ERROR) {
+	    if (delta < MAX_TOUCH_TIME_ERROR &&
+		inode_change_ok(inode, iap) != 0) {
 		/* turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME
 		 * this will cause notify_change to set these times to "now"
 		 */
 		iap->ia_valid &= ~BOTH_TIME_SET;
-		err = inode_change_ok(inode, iap);
 	    }
 	}
 	    
-	if (err)
-		goto out_nfserr;
-
 	/* The size case is special. It changes the file as well as the attributes.  */
 	if (iap->ia_valid & ATTR_SIZE) {
 		if (iap->ia_size < inode->i_size) {
@@ -511,24 +512,33 @@ nfsd_close(struct file *filp)
  * As this calls fsync (not fdatasync) there is no need for a write_inode
  * after it.
  */
+inline void nfsd_dosync(struct file *filp, struct dentry *dp, 
+			struct file_operations *fop)
+{
+	struct inode *inode = dp->d_inode;
+	int (*fsync) (struct file *, struct dentry *, int);
+
+	filemap_fdatasync(inode->i_mapping);
+	if (fop && (fsync = fop->fsync))
+		fsync(filp, dp, 0);
+	filemap_fdatawait(inode->i_mapping);
+}
+	
+
 void
 nfsd_sync(struct file *filp)
 {
+	struct inode *inode = filp->f_dentry->d_inode;
 	dprintk("nfsd: sync file %s\n", filp->f_dentry->d_name.name);
-	down(&filp->f_dentry->d_inode->i_sem);
-	filp->f_op->fsync(filp, filp->f_dentry, 0);
-	up(&filp->f_dentry->d_inode->i_sem);
+	down(&inode->i_sem);
+	nfsd_dosync(filp, filp->f_dentry, filp->f_op);
+	up(&inode->i_sem);
 }
 
 void
 nfsd_sync_dir(struct dentry *dp)
 {
-	struct inode *inode = dp->d_inode;
-	int (*fsync) (struct file *, struct dentry *, int);
-	
-	if (inode->i_fop && (fsync = inode->i_fop->fsync)) {
-		fsync(NULL, dp, 0);
-	}
+	nfsd_dosync(NULL, dp, dp->d_inode->i_fop);
 }
 
 /*
@@ -1382,7 +1392,6 @@ int
 nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset, 
              encode_dent_fn func, u32 *buffer, int *countp, u32 *verf)
 {
-	struct inode	*inode;
 	u32		*p;
 	int		oldlen, eof, err;
 	struct file	file;
@@ -1394,9 +1403,6 @@ nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset,
 	if (offset > ~(u32) 0)
 		goto out_close;
 
-	err = nfserr_notdir;
-	if (!file.f_op->readdir)
-		goto out_close;
 	file.f_pos = offset;
 
 	/* Set up the readdir context */
@@ -1411,25 +1417,16 @@ nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset,
 	 * readdir() is not guaranteed to fill up the entire buffer, but
 	 * may choose to do less.
 	 */
-	inode = file.f_dentry->d_inode;
-	down(&inode->i_sem);
-	while (1) {
+
+	do {
 		oldlen = cd.buflen;
 
-		/*
-		dprintk("nfsd: f_op->readdir(%s/%ld @ %d) buflen = %d (%d)\n",
-			file.f_inode->i_sb->s_id, file.f_inode->i_ino,
-			(int) file.f_pos, (int) oldlen, (int) cd.buflen);
-		 */
-		err = file.f_op->readdir(&file, &cd, (filldir_t) func);
+		err = vfs_readdir(&file, (filldir_t) func, &cd);
+
 		if (err < 0)
 			goto out_nfserr;
-		if (oldlen == cd.buflen)
-			break;
-		if (cd.eob)
-			break;
-	}
-	up(&inode->i_sem);
+
+	} while (oldlen != cd.buflen && !cd.eob);
 
 	/* If we didn't fill the buffer completely, we're at EOF */
 	eof = !cd.eob;
@@ -1456,7 +1453,6 @@ nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset,
 	return err;
 
 out_nfserr:
-	up(&inode->i_sem);
 	err = nfserrno(err);
 	goto out_close;
 }

include/linux/nfsd/interface.h

@@ -16,6 +16,7 @@
 
 extern struct nfsd_linkage {
 	long (*do_nfsservctl)(int cmd, void *argp, void *resp);
+	struct module *owner;
 } * nfsd_linkage;
 
 #endif