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Commit 163f9eb9 authored by David Howells's avatar David Howells Committed by Al Viro
Browse files

debugfs: Provide a file creation function that also takes an initial size 



Provide a file creation function that also takes an initial size so that the
caller doesn't have to set i_size, thus meaning that we don't have to call
deal with ->d_inode in the callers.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent 77b3da6e

drivers/infiniband/hw/cxgb4/device.c

+11 −24
Original line number Diff line number Diff line
@@ -700,37 +700,24 @@ static const struct file_operations ep_debugfs_fops = { 


static int setup_debugfs(struct c4iw_dev *devp)

{

	struct dentry *de;



	if (!devp->debugfs_root)

		return -1;



	de = debugfs_create_file("qps", S_IWUSR, devp->debugfs_root,

				 (void *)devp, &qp_debugfs_fops);

	if (de && de->d_inode)

		de->d_inode->i_size = 4096;

	debugfs_create_file_size("qps", S_IWUSR, devp->debugfs_root,

				 (void *)devp, &qp_debugfs_fops, 4096);



	de = debugfs_create_file("stags", S_IWUSR, devp->debugfs_root,

				 (void *)devp, &stag_debugfs_fops);

	if (de && de->d_inode)

		de->d_inode->i_size = 4096;

	debugfs_create_file_size("stags", S_IWUSR, devp->debugfs_root,

				 (void *)devp, &stag_debugfs_fops, 4096);



	de = debugfs_create_file("stats", S_IWUSR, devp->debugfs_root,

			(void *)devp, &stats_debugfs_fops);

	if (de && de->d_inode)

		de->d_inode->i_size = 4096;

	debugfs_create_file_size("stats", S_IWUSR, devp->debugfs_root,

				 (void *)devp, &stats_debugfs_fops, 4096);



	de = debugfs_create_file("eps", S_IWUSR, devp->debugfs_root,

			(void *)devp, &ep_debugfs_fops);

	if (de && de->d_inode)

		de->d_inode->i_size = 4096;

	debugfs_create_file_size("eps", S_IWUSR, devp->debugfs_root,

				 (void *)devp, &ep_debugfs_fops, 4096);



	if (c4iw_wr_log) {

		de = debugfs_create_file("wr_log", S_IWUSR, devp->debugfs_root,

					 (void *)devp, &wr_log_debugfs_fops);

		if (de && de->d_inode)

			de->d_inode->i_size = 4096;

	}

	if (c4iw_wr_log)

		debugfs_create_file_size("wr_log", S_IWUSR, devp->debugfs_root,

					 (void *)devp, &wr_log_debugfs_fops, 4096);

	return 0;

}

drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c

+3 −6
Original line number Diff line number Diff line
@@ -91,12 +91,9 @@ static const struct file_operations mem_debugfs_fops = { 
static void add_debugfs_mem(struct adapter *adap, const char *name,

			    unsigned int idx, unsigned int size_mb)

{

	struct dentry *de;



	de = debugfs_create_file(name, S_IRUSR, adap->debugfs_root,

				 (void *)adap + idx, &mem_debugfs_fops);

	if (de && de->d_inode)

		de->d_inode->i_size = size_mb << 20;

	debugfs_create_file_size(name, S_IRUSR, adap->debugfs_root,

				 (void *)adap + idx, &mem_debugfs_fops,

				 size_mb << 20);

}



/* Add an array of Debug FS files.

drivers/scsi/csiostor/csio_init.c

+3 −6
Original line number Diff line number Diff line
@@ -113,12 +113,9 @@ static const struct file_operations csio_mem_debugfs_fops = { 
void csio_add_debugfs_mem(struct csio_hw *hw, const char *name,

				 unsigned int idx, unsigned int size_mb)

{

	struct dentry *de;



	de = debugfs_create_file(name, S_IRUSR, hw->debugfs_root,

				 (void *)hw + idx, &csio_mem_debugfs_fops);

	if (de && de->d_inode)

		de->d_inode->i_size = size_mb << 20;

	debugfs_create_file_size(name, S_IRUSR, hw->debugfs_root,

				 (void *)hw + idx, &csio_mem_debugfs_fops,

				 size_mb << 20);

}



static int csio_setup_debugfs(struct csio_hw *hw)

drivers/usb/gadget/udc/atmel_usba_udc.c

+9 −6
Original line number Diff line number Diff line
@@ -264,14 +264,17 @@ static void usba_init_debugfs(struct usba_udc *udc) 
		goto err_root;

	udc->debugfs_root = root;



	regs = debugfs_create_file("regs", 0400, root, udc, &regs_dbg_fops);

	if (!regs)

		goto err_regs;



	regs_resource = platform_get_resource(udc->pdev, IORESOURCE_MEM,

				CTRL_IOMEM_ID);

	regs->d_inode->i_size = resource_size(regs_resource);



	if (regs_resource) {

		regs = debugfs_create_file_size("regs", 0400, root, udc,

						&regs_dbg_fops,

						resource_size(regs_resource));

		if (!regs)

			goto err_regs;

		udc->debugfs_regs = regs;

	}



	usba_ep_init_debugfs(udc, to_usba_ep(udc->gadget.ep0));

fs/debugfs/inode.c

+40 −0
Original line number Diff line number Diff line
@@ -337,6 +337,46 @@ struct dentry *debugfs_create_file(const char *name, umode_t mode, 
}

EXPORT_SYMBOL_GPL(debugfs_create_file);



/**

 * debugfs_create_file_size - create a file in the debugfs filesystem

 * @name: a pointer to a string containing the name of the file to create.

 * @mode: the permission that the file should have.

 * @parent: a pointer to the parent dentry for this file.  This should be a

 *          directory dentry if set.  If this parameter is NULL, then the

 *          file will be created in the root of the debugfs filesystem.

 * @data: a pointer to something that the caller will want to get to later

 *        on.  The inode.i_private pointer will point to this value on

 *        the open() call.

 * @fops: a pointer to a struct file_operations that should be used for

 *        this file.

 * @file_size: initial file size

 *

 * This is the basic "create a file" function for debugfs.  It allows for a

 * wide range of flexibility in creating a file, or a directory (if you want

 * to create a directory, the debugfs_create_dir() function is

 * recommended to be used instead.)

 *

 * This function will return a pointer to a dentry if it succeeds.  This

 * pointer must be passed to the debugfs_remove() function when the file is

 * to be removed (no automatic cleanup happens if your module is unloaded,

 * you are responsible here.)  If an error occurs, %NULL will be returned.

 *

 * If debugfs is not enabled in the kernel, the value -%ENODEV will be

 * returned.

 */

struct dentry *debugfs_create_file_size(const char *name, umode_t mode,

					struct dentry *parent, void *data,

					const struct file_operations *fops,

					loff_t file_size)

{

	struct dentry *de = debugfs_create_file(name, mode, parent, data, fops);



	if (de)

		de->d_inode->i_size = file_size;

	return de;

}

EXPORT_SYMBOL_GPL(debugfs_create_file_size);



/**

 * debugfs_create_dir - create a directory in the debugfs filesystem

 * @name: a pointer to a string containing the name of the directory to