linux-kernel - [PATCH 22/30] IGET: Stop PROCFS from using iget() and read

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20071001131114.29339.60243.stgit@warthog.procyon.org.uk>
Date:	Mon, 01 Oct 2007 14:11:14 +0100
From:	David Howells <dhowells@...hat.com>
To:	hch@...radead.org, viro@....linux.org.uk, torvalds@...l.org,
	akpm@...l.org
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	dhowells@...hat.com
Subject: [PATCH 22/30] IGET: Stop PROCFS from using iget() and read_inode()

Stop the PROCFS filesystem from using iget() and read_inode().  Merge
procfs_read_inode() into procfs_get_inode(), and have that call iget_locked()
instead of iget().

Signed-off-by: David Howells <dhowells@...hat.com>
---

 fs/proc/inode.c |   60 ++++++++++++++++++++++++++-----------------------------
 1 files changed, 28 insertions(+), 32 deletions(-)

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 0e4d37c..7a563c5 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -78,11 +78,6 @@ static void proc_delete_inode(struct inode *inode)
 
 struct vfsmount *proc_mnt;
 
-static void proc_read_inode(struct inode * inode)
-{
-	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
-}
-
 static struct kmem_cache * proc_inode_cachep;
 
 static struct inode *proc_alloc_inode(struct super_block *sb)
@@ -135,7 +130,6 @@ static int proc_remount(struct super_block *sb, int *flags, char *data)
 static const struct super_operations proc_sops = {
 	.alloc_inode	= proc_alloc_inode,
 	.destroy_inode	= proc_destroy_inode,
-	.read_inode	= proc_read_inode,
 	.drop_inode	= generic_delete_inode,
 	.delete_inode	= proc_delete_inode,
 	.statfs		= simple_statfs,
@@ -408,39 +402,41 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
 	if (de != NULL && !try_module_get(de->owner))
 		goto out_mod;
 
-	inode = iget(sb, ino);
+	inode = iget_locked(sb, ino);
 	if (!inode)
 		goto out_ino;
-
-	PROC_I(inode)->fd = 0;
-	PROC_I(inode)->pde = de;
-	if (de) {
-		if (de->mode) {
-			inode->i_mode = de->mode;
-			inode->i_uid = de->uid;
-			inode->i_gid = de->gid;
-		}
-		if (de->size)
-			inode->i_size = de->size;
-		if (de->nlink)
-			inode->i_nlink = de->nlink;
-		if (de->proc_iops)
-			inode->i_op = de->proc_iops;
-		if (de->proc_fops) {
-			if (S_ISREG(inode->i_mode)) {
+	if (inode->i_state & I_NEW) {
+		inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+		PROC_I(inode)->fd = 0;
+		PROC_I(inode)->pde = de;
+		if (de) {
+			if (de->mode) {
+				inode->i_mode = de->mode;
+				inode->i_uid = de->uid;
+				inode->i_gid = de->gid;
+			}
+			if (de->size)
+				inode->i_size = de->size;
+			if (de->nlink)
+				inode->i_nlink = de->nlink;
+			if (de->proc_iops)
+				inode->i_op = de->proc_iops;
+			if (de->proc_fops) {
+				if (S_ISREG(inode->i_mode)) {
 #ifdef CONFIG_COMPAT
-				if (!de->proc_fops->compat_ioctl)
-					inode->i_fop =
-						&proc_reg_file_ops_no_compat;
-				else
+					if (!de->proc_fops->compat_ioctl)
+						inode->i_fop =
+							&proc_reg_file_ops_no_compat;
+					else
 #endif
-					inode->i_fop = &proc_reg_file_ops;
+						inode->i_fop = &proc_reg_file_ops;
+				}
+				else
+					inode->i_fop = de->proc_fops;
 			}
-			else
-				inode->i_fop = de->proc_fops;
 		}
+		unlock_new_inode(inode);
 	}
-
 	return inode;
 
 out_ino:

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/