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Commit 0f2cc4ec authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (52 commits)
  init: Open /dev/console from rootfs
  mqueue: fix typo "failues" -> "failures"
  mqueue: only set error codes if they are really necessary
  mqueue: simplify do_open() error handling
  mqueue: apply mathematics distributivity on mq_bytes calculation
  mqueue: remove unneeded info->messages initialization
  mqueue: fix mq_open() file descriptor leak on user-space processes
  fix race in d_splice_alias()
  set S_DEAD on unlink() and non-directory rename() victims
  vfs: add NOFOLLOW flag to umount(2)
  get rid of ->mnt_parent in tomoyo/realpath
  hppfs can use existing proc_mnt, no need for do_kern_mount() in there
  Mirror MS_KERNMOUNT in ->mnt_flags
  get rid of useless vfsmount_lock use in put_mnt_ns()
  Take vfsmount_lock to fs/internal.h
  get rid of insanity with namespace roots in tomoyo
  take check for new events in namespace (guts of mounts_poll()) to namespace.c
  Don't mess with generic_permission() under ->d_lock in hpfs
  sanitize const/signedness for udf
  nilfs: sanitize const/signedness in dealing with ->d_name.name
  ...

Fix up fairly trivial (famous last words...) conflicts in
drivers/infiniband/core/uverbs_main.c and security/tomoyo/realpath.c
parents 1fae4cfb 9643f5d9

Documentation/filesystems/sharedsubtree.txt

+15 −1
Original line number Diff line number Diff line
@@ -837,6 +837,9 @@ replicas continue to be exactly same. 
	 individual lists does not affect propagation or the way propagation

	 tree is modified by operations.



	All vfsmounts in a peer group have the same ->mnt_master.  If it is

	non-NULL, they form a contiguous (ordered) segment of slave list.



	A example propagation tree looks as shown in the figure below.

	[ NOTE: Though it looks like a forest, if we consider all the shared

	mounts as a conceptual entity called 'pnode', it becomes a tree]
@@ -874,8 +877,19 @@ replicas continue to be exactly same. 


	NOTE: The propagation tree is orthogonal to the mount tree.



8B Locking:



	->mnt_share, ->mnt_slave, ->mnt_slave_list, ->mnt_master are protected

	by namespace_sem (exclusive for modifications, shared for reading).



	Normally we have ->mnt_flags modifications serialized by vfsmount_lock.

	There are two exceptions: do_add_mount() and clone_mnt().

	The former modifies a vfsmount that has not been visible in any shared

	data structures yet.

	The latter holds namespace_sem and the only references to vfsmount

	are in lists that can't be traversed without namespace_sem.



8B Algorithm:

8C Algorithm:



	The crux of the implementation resides in rbind/move operation.

arch/s390/hypfs/inode.c

+13 −29
Original line number Diff line number Diff line
@@ -288,46 +288,30 @@ static int hypfs_fill_super(struct super_block *sb, void *data, int silent) 
	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;

	sb->s_magic = HYPFS_MAGIC;

	sb->s_op = &hypfs_s_ops;

	if (hypfs_parse_options(data, sb)) {

		rc = -EINVAL;

		goto err_alloc;

	}

	if (hypfs_parse_options(data, sb))

		return -EINVAL;

	root_inode = hypfs_make_inode(sb, S_IFDIR | 0755);

	if (!root_inode) {

		rc = -ENOMEM;

		goto err_alloc;

	}

	if (!root_inode)

		return -ENOMEM;

	root_inode->i_op = &simple_dir_inode_operations;

	root_inode->i_fop = &simple_dir_operations;

	root_dentry = d_alloc_root(root_inode);

	sb->s_root = root_dentry = d_alloc_root(root_inode);

	if (!root_dentry) {

		iput(root_inode);

		rc = -ENOMEM;

		goto err_alloc;

		return -ENOMEM;

	}

	if (MACHINE_IS_VM)

		rc = hypfs_vm_create_files(sb, root_dentry);

	else

		rc = hypfs_diag_create_files(sb, root_dentry);

	if (rc)

		goto err_tree;

		return rc;

	sbi->update_file = hypfs_create_update_file(sb, root_dentry);

	if (IS_ERR(sbi->update_file)) {

		rc = PTR_ERR(sbi->update_file);

		goto err_tree;

	}

	if (IS_ERR(sbi->update_file))

		return PTR_ERR(sbi->update_file);

	hypfs_update_update(sb);

	sb->s_root = root_dentry;

	pr_info("Hypervisor filesystem mounted\n");

	return 0;



err_tree:

	hypfs_delete_tree(root_dentry);

	d_genocide(root_dentry);

	dput(root_dentry);

err_alloc:

	kfree(sbi);

	return rc;

}



static int hypfs_get_super(struct file_system_type *fst, int flags,
@@ -340,12 +324,12 @@ static void hypfs_kill_super(struct super_block *sb) 
{

	struct hypfs_sb_info *sb_info = sb->s_fs_info;



	if (sb->s_root) {

	if (sb->s_root)

		hypfs_delete_tree(sb->s_root);

	if (sb_info->update_file)

		hypfs_remove(sb_info->update_file);

	kfree(sb->s_fs_info);

	sb->s_fs_info = NULL;

	}

	kill_litter_super(sb);

}

arch/um/drivers/mconsole_kern.c

+1 −1
Original line number Diff line number Diff line
@@ -140,7 +140,7 @@ void mconsole_proc(struct mc_request *req) 
		goto out;

	}



	err = may_open(&nd.path, MAY_READ, FMODE_READ);

	err = may_open(&nd.path, MAY_READ, O_RDONLY);

	if (result) {

		mconsole_reply(req, "Failed to open file", 1, 0);

		path_put(&nd.path);

drivers/infiniband/core/uverbs.h

+1 −1
Original line number Diff line number Diff line
@@ -146,7 +146,7 @@ extern struct idr ib_uverbs_srq_idr; 
void idr_remove_uobj(struct idr *idp, struct ib_uobject *uobj);



struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,

					int is_async, int *fd);

					int is_async);

struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd);



void ib_uverbs_release_ucq(struct ib_uverbs_file *file,

drivers/infiniband/core/uverbs_cmd.c

+20 −5
Original line number Diff line number Diff line
@@ -301,10 +301,15 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, 


	resp.num_comp_vectors = file->device->num_comp_vectors;



	filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);

	ret = get_unused_fd();

	if (ret < 0)

		goto err_free;

	resp.async_fd = ret;



	filp = ib_uverbs_alloc_event_file(file, 1);

	if (IS_ERR(filp)) {

		ret = PTR_ERR(filp);

		goto err_free;

		goto err_fd;

	}



	if (copy_to_user((void __user *) (unsigned long) cmd.response,
@@ -332,9 +337,11 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, 
	return in_len;



err_file:

	put_unused_fd(resp.async_fd);

	fput(filp);



err_fd:

	put_unused_fd(resp.async_fd);



err_free:

	ibdev->dealloc_ucontext(ucontext);
@@ -715,6 +722,7 @@ ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file, 
	struct ib_uverbs_create_comp_channel	   cmd;

	struct ib_uverbs_create_comp_channel_resp  resp;

	struct file				  *filp;

	int ret;



	if (out_len < sizeof resp)

		return -ENOSPC;
@@ -722,9 +730,16 @@ ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file, 
	if (copy_from_user(&cmd, buf, sizeof cmd))

		return -EFAULT;



	filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);

	if (IS_ERR(filp))

	ret = get_unused_fd();

	if (ret < 0)

		return ret;

	resp.fd = ret;



	filp = ib_uverbs_alloc_event_file(file, 0);

	if (IS_ERR(filp)) {

		put_unused_fd(resp.fd);

		return PTR_ERR(filp);

	}



	if (copy_to_user((void __user *) (unsigned long) cmd.response,

			 &resp, sizeof resp)) {