/*
 *  linux/fs/bad_inode.c
 *
 *  Copyright (C) 1997, Stephen Tweedie
 *
 *  Provide stub functions for unreadable inodes
 *
 *  Fabian Frederick : August 2003 - All file operations assigned to EIO
 */

#include <linux/fs.h>
#include <linux/export.h>
#include <linux/stat.h>
#include <linux/time.h>
#include <linux/namei.h>
#include <linux/poll.h>

static int bad_file_open(struct inode *inode, struct file *filp)
{
	return -EIO;
}

static const struct file_operations bad_file_ops =
{
	.open		= bad_file_open,
};

static int bad_inode_create (struct inode *dir, struct dentry *dentry,
		umode_t mode, bool excl)
{
	return -EIO;
}

static struct dentry *bad_inode_lookup(struct inode *dir,
			struct dentry *dentry, unsigned int flags)
{
	return ERR_PTR(-EIO);
}

static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
		struct dentry *dentry)
{
	return -EIO;
}

static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
{
	return -EIO;
}

static int bad_inode_symlink (struct inode *dir, struct dentry *dentry,
		const char *symname)
{
	return -EIO;
}

static int bad_inode_mkdir(struct inode *dir, struct dentry *dentry,
			umode_t mode)
{
	return -EIO;
}

static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
{
	return -EIO;
}

static int bad_inode_mknod (struct inode *dir, struct dentry *dentry,
			umode_t mode, dev_t rdev)
{
	return -EIO;
}

static int bad_inode_rename2(struct inode *old_dir, struct dentry *old_dentry,
			     struct inode *new_dir, struct dentry *new_dentry,
			     unsigned int flags)
{
	return -EIO;
}

static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
		int buflen)
{
	return -EIO;
}

static int bad_inode_permission(struct inode *inode, int mask)
{
	return -EIO;
}

static int bad_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
			struct kstat *stat)
{
	return -EIO;
}

static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
{
	return -EIO;
}

static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
			size_t buffer_size)
{
	return -EIO;
}

static const char *bad_inode_get_link(struct dentry *dentry,
				      struct inode *inode,
				      struct delayed_call *done)
{
	return ERR_PTR(-EIO);
}

static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type)
{
	return ERR_PTR(-EIO);
}

static int bad_inode_fiemap(struct inode *inode,
			    struct fiemap_extent_info *fieinfo, u64 start,
			    u64 len)
{
	return -EIO;
}

static int bad_inode_update_time(struct inode *inode, struct timespec *time,
				 int flags)
{
	return -EIO;
}

static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry,
				 struct file *file, unsigned int open_flag,
				 umode_t create_mode, int *opened)
{
	return -EIO;
}

static int bad_inode_tmpfile(struct inode *inode, struct dentry *dentry,
			     umode_t mode)
{
	return -EIO;
}

static int bad_inode_set_acl(struct inode *inode, struct posix_acl *acl,
			     int type)
{
	return -EIO;
}

static const struct inode_operations bad_inode_ops =
{
	.create		= bad_inode_create,
	.lookup		= bad_inode_lookup,
	.link		= bad_inode_link,
	.unlink		= bad_inode_unlink,
	.symlink	= bad_inode_symlink,
	.mkdir		= bad_inode_mkdir,
	.rmdir		= bad_inode_rmdir,
	.mknod		= bad_inode_mknod,
	.rename		= bad_inode_rename2,
	.readlink	= bad_inode_readlink,
	.permission	= bad_inode_permission,
	.getattr	= bad_inode_getattr,
	.setattr	= bad_inode_setattr,
	.listxattr	= bad_inode_listxattr,
	.get_link	= bad_inode_get_link,
	.get_acl	= bad_inode_get_acl,
	.fiemap		= bad_inode_fiemap,
	.update_time	= bad_inode_update_time,
	.atomic_open	= bad_inode_atomic_open,
	.tmpfile	= bad_inode_tmpfile,
	.set_acl	= bad_inode_set_acl,
};


/*
 * When a filesystem is unable to read an inode due to an I/O error in
 * its read_inode() function, it can call make_bad_inode() to return a
 * set of stubs which will return EIO errors as required. 
 *
 * We only need to do limited initialisation: all other fields are
 * preinitialised to zero automatically.
 */
 
/**
 *	make_bad_inode - mark an inode bad due to an I/O error
 *	@inode: Inode to mark bad
 *
 *	When an inode cannot be read due to a media or remote network
 *	failure this function makes the inode "bad" and causes I/O operations
 *	on it to fail from this point on.
 */
 
void make_bad_inode(struct inode *inode)
{
	remove_inode_hash(inode);

	inode->i_mode = S_IFREG;
	inode->i_atime = inode->i_mtime = inode->i_ctime =
		current_time(inode);
	inode->i_op = &bad_inode_ops;	
	inode->i_opflags &= ~IOP_XATTR;
	inode->i_fop = &bad_file_ops;	
}
EXPORT_SYMBOL(make_bad_inode);

/*
 * This tests whether an inode has been flagged as bad. The test uses
 * &bad_inode_ops to cover the case of invalidated inodes as well as
 * those created by make_bad_inode() above.
 */
 
/**
 *	is_bad_inode - is an inode errored
 *	@inode: inode to test
 *
 *	Returns true if the inode in question has been marked as bad.
 */
 
bool is_bad_inode(struct inode *inode)
{
	return (inode->i_op == &bad_inode_ops);	
}

EXPORT_SYMBOL(is_bad_inode);

/**
 * iget_failed - Mark an under-construction inode as dead and release it
 * @inode: The inode to discard
 *
 * Mark an under-construction inode as dead and release it.
 */
void iget_failed(struct inode *inode)
{
	make_bad_inode(inode);
	unlock_new_inode(inode);
	iput(inode);
}
EXPORT_SYMBOL(iget_failed);
h?id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>be6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/clock/hip04-clock.h?id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>include/dt-bindings/clock/hip04-clock.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock/hip04-clock.h?id=24c2503255d35c269b67162c397a1a1c1e02f6ce'>24c2503255d35c269b67162c397a1a1c1e02f6ce</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/clock/hip04-clock.h?id=0becc0ae5b42828785b589f686725ff5bc3b9b25&amp;id2=24c2503255d35c269b67162c397a1a1c1e02f6ce'>diff</a>)</td></tr></table>
<div class='commit-subject'>x86/mce: Make timer handling more robust</div><div class='commit-msg'>Erik reported that on a preproduction hardware a CMCI storm triggers the
BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is
started by the CMCI logic before the MCE CPU hotplug callback starts the
timer with add_timer_on(). So the timer is already queued which triggers
the BUG.

Using add_timer_on() is pretty pointless in this code because the timer is
strictlty per CPU, initialized as pinned and all operations which arm the
timer happen on the CPU to which the timer belongs.

Simplify the whole machinery by using mod_timer() instead of add_timer_on()
which avoids the problem because mod_timer() can handle already queued
timers. Use __start_timer() everywhere so the earliest armed expiry time is
preserved.

Reported-by: Erik Veijola &lt;erik.veijola@intel.com&gt;
Tested-by: Borislav Petkov &lt;bp@alien8.de&gt;
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Reviewed-by: Borislav Petkov &lt;bp@alien8.de&gt;
Cc: Tony Luck &lt;tony.luck@intel.com&gt;
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;

</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>Diffstat</a> (limited to 'include/dt-bindings/clock/hip04-clock.h')</div><table summary='diffstat' class='diffstat'>