Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 75 insertions, 94 deletions

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index af7c3c3074b..eef0576a778 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -48,8 +48,8 @@
 #include <linux/fsnotify.h>
 #include <linux/posix_acl.h>
 #include <linux/posix_acl_xattr.h>
-#ifdef CONFIG_NFSD_V4
 #include <linux/xattr.h>
+#ifdef CONFIG_NFSD_V4
 #include <linux/nfs4.h>
 #include <linux/nfs4_acl.h>
 #include <linux/nfsd_idmap.h>
@@ -365,8 +365,30 @@ out_nfserr:
 	goto out;
 }
 
-#if defined(CONFIG_NFSD_V4)
+#if defined(CONFIG_NFSD_V2_ACL) || \
+    defined(CONFIG_NFSD_V3_ACL) || \
+    defined(CONFIG_NFSD_V4)
+static ssize_t nfsd_getxattr(struct dentry *dentry, char *key, void **buf)
+{
+	ssize_t buflen;
+	int error;
+
+	buflen = vfs_getxattr(dentry, key, NULL, 0);
+	if (buflen <= 0)
+		return buflen;
+
+	*buf = kmalloc(buflen, GFP_KERNEL);
+	if (!*buf)
+		return -ENOMEM;
 
+	error = vfs_getxattr(dentry, key, *buf, buflen);
+	if (error < 0)
+		return error;
+	return buflen;
+}
+#endif
+
+#if defined(CONFIG_NFSD_V4)
 static int
 set_nfsv4_acl_one(struct dentry *dentry, struct posix_acl *pacl, char *key)
 {
@@ -374,7 +396,6 @@ set_nfsv4_acl_one(struct dentry *dentry, struct posix_acl *pacl, char *key)
 	size_t buflen;
 	char *buf = NULL;
 	int error = 0;
-	struct inode *inode = dentry->d_inode;
 
 	buflen = posix_acl_xattr_size(pacl->a_count);
 	buf = kmalloc(buflen, GFP_KERNEL);
@@ -388,15 +409,7 @@ set_nfsv4_acl_one(struct dentry *dentry, struct posix_acl *pacl, char *key)
 		goto out;
 	}
 
-	error = -EOPNOTSUPP;
-	if (inode->i_op && inode->i_op->setxattr) {
-		down(&inode->i_sem);
-		security_inode_setxattr(dentry, key, buf, len, 0);
-		error = inode->i_op->setxattr(dentry, key, buf, len, 0);
-		if (!error)
-			security_inode_post_setxattr(dentry, key, buf, len, 0);
-		up(&inode->i_sem);
-	}
+	error = vfs_setxattr(dentry, key, buf, len, 0);
 out:
 	kfree(buf);
 	return error;
@@ -455,44 +468,19 @@ out_nfserr:
 static struct posix_acl *
 _get_posix_acl(struct dentry *dentry, char *key)
 {
-	struct inode *inode = dentry->d_inode;
-	char *buf = NULL;
-	int buflen, error = 0;
+	void *buf = NULL;
 	struct posix_acl *pacl = NULL;
+	int buflen;
 
-	error = -EOPNOTSUPP;
-	if (inode->i_op == NULL)
-		goto out_err;
-	if (inode->i_op->getxattr == NULL)
-		goto out_err;
-
-	error = security_inode_getxattr(dentry, key);
-	if (error)
-		goto out_err;
-
-	buflen = inode->i_op->getxattr(dentry, key, NULL, 0);
-	if (buflen <= 0) {
-		error = buflen < 0 ? buflen : -ENODATA;
-		goto out_err;
-	}
-
-	buf = kmalloc(buflen, GFP_KERNEL);
-	if (buf == NULL) {
-		error = -ENOMEM;
-		goto out_err;
-	}
-
-	error = inode->i_op->getxattr(dentry, key, buf, buflen);
-	if (error < 0)
-		goto out_err;
+	buflen = nfsd_getxattr(dentry, key, &buf);
+	if (!buflen)
+		buflen = -ENODATA;
+	if (buflen <= 0)
+		return ERR_PTR(buflen);
 
 	pacl = posix_acl_from_xattr(buf, buflen);
- out:
 	kfree(buf);
 	return pacl;
- out_err:
-	pacl = ERR_PTR(error);
-	goto out;
 }
 
 int
@@ -717,27 +705,33 @@ nfsd_close(struct file *filp)
  * As this calls fsync (not fdatasync) there is no need for a write_inode
  * after it.
  */
-static inline void nfsd_dosync(struct file *filp, struct dentry *dp,
-			       struct file_operations *fop)
+static inline int 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);
+	int err = nfs_ok;
 
 	filemap_fdatawrite(inode->i_mapping);
 	if (fop && (fsync = fop->fsync))
-		fsync(filp, dp, 0);
+		err=fsync(filp, dp, 0);
 	filemap_fdatawait(inode->i_mapping);
+
+	return nfserrno(err);
 }
 	
 
-static void
+static int
 nfsd_sync(struct file *filp)
 {
+        int err;
 	struct inode *inode = filp->f_dentry->d_inode;
 	dprintk("nfsd: sync file %s\n", filp->f_dentry->d_name.name);
-	down(&inode->i_sem);
-	nfsd_dosync(filp, filp->f_dentry, filp->f_op);
-	up(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
+	err=nfsd_dosync(filp, filp->f_dentry, filp->f_op);
+	mutex_unlock(&inode->i_mutex);
+
+	return err;
 }
 
 void
@@ -874,6 +868,16 @@ out:
 	return err;
 }
 
+static void kill_suid(struct dentry *dentry)
+{
+	struct iattr	ia;
+	ia.ia_valid = ATTR_KILL_SUID | ATTR_KILL_SGID;
+
+	mutex_lock(&dentry->d_inode->i_mutex);
+	notify_change(dentry, &ia);
+	mutex_unlock(&dentry->d_inode->i_mutex);
+}
+
 static inline int
 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 				loff_t offset, struct kvec *vec, int vlen,
@@ -927,14 +931,8 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 	}
 
 	/* clear setuid/setgid flag after write */
-	if (err >= 0 && (inode->i_mode & (S_ISUID | S_ISGID))) {
-		struct iattr	ia;
-		ia.ia_valid = ATTR_KILL_SUID | ATTR_KILL_SGID;
-
-		down(&inode->i_sem);
-		notify_change(dentry, &ia);
-		up(&inode->i_sem);
-	}
+	if (err >= 0 && (inode->i_mode & (S_ISUID | S_ISGID)))
+		kill_suid(dentry);
 
 	if (err >= 0 && stable) {
 		static ino_t	last_ino;
@@ -962,7 +960,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 
 			if (inode->i_state & I_DIRTY) {
 				dprintk("nfsd: write sync %d\n", current->pid);
-				nfsd_sync(file);
+				err=nfsd_sync(file);
 			}
 #if 0
 			wake_up(&inode->i_wait);
@@ -1066,7 +1064,7 @@ nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp,
 		return err;
 	if (EX_ISSYNC(fhp->fh_export)) {
 		if (file->f_op && file->f_op->fsync) {
-			nfsd_sync(file);
+			err = nfsd_sync(file);
 		} else {
 			err = nfserr_notsupp;
 		}
@@ -1874,39 +1872,25 @@ nfsd_get_posix_acl(struct svc_fh *fhp, int type)
 	ssize_t size;
 	struct posix_acl *acl;
 
-	if (!IS_POSIXACL(inode) || !inode->i_op || !inode->i_op->getxattr)
+	if (!IS_POSIXACL(inode))
+		return ERR_PTR(-EOPNOTSUPP);
+
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		name = POSIX_ACL_XATTR_ACCESS;
+		break;
+	case ACL_TYPE_DEFAULT:
+		name = POSIX_ACL_XATTR_DEFAULT;
+		break;
+	default:
 		return ERR_PTR(-EOPNOTSUPP);
-	switch(type) {
-		case ACL_TYPE_ACCESS:
-			name = POSIX_ACL_XATTR_ACCESS;
-			break;
-		case ACL_TYPE_DEFAULT:
-			name = POSIX_ACL_XATTR_DEFAULT;
-			break;
-		default:
-			return ERR_PTR(-EOPNOTSUPP);
 	}
 
-	size = inode->i_op->getxattr(fhp->fh_dentry, name, NULL, 0);
+	size = nfsd_getxattr(fhp->fh_dentry, name, &value);
+	if (size < 0)
+		return ERR_PTR(size);
 
-	if (size < 0) {
-		acl = ERR_PTR(size);
-		goto getout;
-	} else if (size > 0) {
-		value = kmalloc(size, GFP_KERNEL);
-		if (!value) {
-			acl = ERR_PTR(-ENOMEM);
-			goto getout;
-		}
-		size = inode->i_op->getxattr(fhp->fh_dentry, name, value, size);
-		if (size < 0) {
-			acl = ERR_PTR(size);
-			goto getout;
-		}
-	}
 	acl = posix_acl_from_xattr(value, size);
-
-getout:
 	kfree(value);
 	return acl;
 }
@@ -1947,16 +1931,13 @@ nfsd_set_posix_acl(struct svc_fh *fhp, int type, struct posix_acl *acl)
 	} else
 		size = 0;
 
-	if (!fhp->fh_locked)
-		fh_lock(fhp);  /* unlocking is done automatically */
 	if (size)
-		error = inode->i_op->setxattr(fhp->fh_dentry, name,
-					      value, size, 0);
+		error = vfs_setxattr(fhp->fh_dentry, name, value, size, 0);
 	else {
 		if (!S_ISDIR(inode->i_mode) && type == ACL_TYPE_DEFAULT)
 			error = 0;
 		else {
-			error = inode->i_op->removexattr(fhp->fh_dentry, name);
+			error = vfs_removexattr(fhp->fh_dentry, name);
 			if (error == -ENODATA)
 				error = 0;
 		}