The patch titled
iget: stop HPPFS from using iget() and read_inode()
has been added to the -mm tree. Its filename is
iget-stop-hppfs-from-using-iget-and-read_inode.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: iget: stop HPPFS from using iget() and read_inode()
From: David Howells <dhowells@xxxxxxxxxx>
Stop the HPPFS filesystem from using iget() and read_inode(). Provide an
hppfs_iget(), and call that instead of iget(). hppfs_iget() then uses
iget_locked() directly and returns a proper error code instead of an inode in
the event of an error.
hppfs_fill_sb_common() returns any error incurred when getting the root inode
instead of EINVAL.
Note that the contents of hppfs_kern.c need to be examined:
(*) The HPPFS inode retains a pointer to the proc dentry it is shadowing, but
whilst it does appear to retain a reference to it, it doesn't appear to
destroy the reference if the inode goes away.
(*) hppfs_iget() should perhaps subsume init_inode() and hppfs_read_inode().
(*) It would appear that all hppfs inodes are the same inode because iget()
was being called with inode number 0, which forms the lookup key.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/hppfs/hppfs_kern.c | 27 ++++++++++++++++++++++-----
1 file changed, 22 insertions(+), 5 deletions(-)
diff -puN fs/hppfs/hppfs_kern.c~iget-stop-hppfs-from-using-iget-and-read_inode fs/hppfs/hppfs_kern.c
--- a/fs/hppfs/hppfs_kern.c~iget-stop-hppfs-from-using-iget-and-read_inode
+++ a/fs/hppfs/hppfs_kern.c
@@ -155,6 +155,20 @@ static void hppfs_read_inode(struct inod
ino->i_blocks = proc_ino->i_blocks;
}
+static struct inode *hppfs_iget(struct super_block *sb)
+{
+ struct inode *inode;
+
+ inode = iget_locked(sb, 0);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (inode->i_state & I_NEW) {
+ hppfs_read_inode(inode);
+ unlock_new_inode(inode);
+ }
+ return inode;
+}
+
static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
struct nameidata *nd)
{
@@ -190,9 +204,11 @@ static struct dentry *hppfs_lookup(struc
if(IS_ERR(proc_dentry))
return(proc_dentry);
- inode = iget(ino->i_sb, 0);
- if(inode == NULL)
+ inode = hppfs_iget(ino->i_sb);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
goto out_dput;
+ }
err = init_inode(inode, proc_dentry);
if(err)
@@ -652,7 +668,6 @@ static void hppfs_destroy_inode(struct i
static const struct super_operations hppfs_sbops = {
.alloc_inode = hppfs_alloc_inode,
.destroy_inode = hppfs_destroy_inode,
- .read_inode = hppfs_read_inode,
.delete_inode = hppfs_delete_inode,
.statfs = hppfs_statfs,
};
@@ -745,9 +760,11 @@ static int hppfs_fill_super(struct super
sb->s_magic = HPPFS_SUPER_MAGIC;
sb->s_op = &hppfs_sbops;
- root_inode = iget(sb, 0);
- if(root_inode == NULL)
+ root_inode = hppfs_iget(sb);
+ if (IS_ERR(root_inode)) {
+ err = PTR_ERR(root_inode);
goto out;
+ }
err = init_inode(root_inode, proc_sb->s_root);
if(err)
_
Patches currently in -mm which might be from dhowells@xxxxxxxxxx are
origin.patch
64-bit-i_version-afs-fixes.patch
add-an-err_cast-function-to-complement-err_ptr-and-co.patch
convert-err_ptrptr_errp-instances-to-err_castp.patch
iget-introduce-a-function-to-register-iget-failure.patch
iget-use-iget_failed-in-afs.patch
iget-use-iget_failed-in-gfs2.patch
iget-stop-affs-from-using-iget-and-read_inode-try.patch
iget-stop-affs-from-using-iget-and-read_inode-try-checkpatch-fixes.patch
iget-stop-autofs-from-using-iget-and-read_inode.patch
iget-stop-befs-from-using-iget-and-read_inode-try.patch
iget-stop-bfs-from-using-iget-and-read_inode-try.patch
iget-stop-cifs-from-using-iget-and-read_inode-try.patch
iget-stop-efs-from-using-iget-and-read_inode-try.patch
iget-stop-efs-from-using-iget-and-read_inode-try-checkpatch-fixes.patch
iget-stop-ext2-from-using-iget-and-read_inode-try.patch
iget-stop-ext2-from-using-iget-and-read_inode-try-checkpatch-fixes.patch
iget-stop-ext3-from-using-iget-and-read_inode-try.patch
iget-stop-ext3-from-using-iget-and-read_inode-try-checkpatch-fixes.patch
iget-stop-ext4-from-using-iget-and-read_inode-try.patch
iget-stop-fat-from-using-iget-and-read_inode-try.patch
iget-stop-freevxfs-from-using-iget-and-read_inode.patch
iget-stop-freevxfs-from-using-iget-and-read_inode-checkpatch-fixes.patch
iget-stop-fuse-from-using-iget-and-read_inode-try.patch
iget-stop-hfsplus-from-using-iget-and-read_inode.patch
iget-stop-isofs-from-using-read_inode.patch
iget-stop-jffs2-from-using-iget-and-read_inode.patch
iget-stop-jfs-from-using-iget-and-read_inode-try.patch
iget-stop-the-minix-filesystem-from-using-iget-and.patch
iget-stop-the-minix-filesystem-from-using-iget-and-checkpatch-fixes.patch
iget-stop-procfs-from-using-iget-and-read_inode.patch
iget-stop-procfs-from-using-iget-and-read_inode-checkpatch-fixes.patch
iget-stop-qnx4-from-using-iget-and-read_inode-try.patch
iget-stop-qnx4-from-using-iget-and-read_inode-try-checkpatch-fixes.patch
iget-stop-romfs-from-using-iget-and-read_inode.patch
iget-stop-romfs-from-using-iget-and-read_inode-checkpatch-fixes.patch
iget-stop-the-sysv-filesystem-from-using-iget-and.patch
iget-stop-the-sysv-filesystem-from-using-iget-and-checkpatch-fixes.patch
iget-stop-ufs-from-using-iget-and-read_inode-try.patch
iget-stop-ufs-from-using-iget-and-read_inode-try-checkpatch-fixes.patch
iget-stop-openpromfs-from-using-iget-and.patch
iget-stop-hostfs-from-using-iget-and-read_inode.patch
iget-stop-hostfs-from-using-iget-and-read_inode-checkpatch-fixes.patch
iget-stop-hppfs-from-using-iget-and-read_inode.patch
iget-remove-iget-and-the-read_inode-super-op-as.patch
mutex-subsystem-synchro-test-module.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
