/* 
 * QNX4 file system, Linux implementation.
 * 
 * Version : 0.2.1
 * 
 * Using parts of the xiafs filesystem.
 * 
 * History :
 * 
 * 01-06-1998 by Richard Frowijn : first release.
 * 21-06-1998 by Frank Denis : dcache support, fixed error codes.
 * 04-07-1998 by Frank Denis : first step for rmdir/unlink.
 */

#include <linux/buffer_head.h>
#include "qnx4.h"


/*
 * check if the filename is correct. For some obscure reason, qnx writes a
 * new file twice in the directory entry, first with all possible options at 0
 * and for a second time the way it is, they want us not to access the qnx
 * filesystem when whe are using linux.
 */
static int qnx4_match(int len, const char *name,
		      struct buffer_head *bh, unsigned long *offset)
{
	struct qnx4_inode_entry *de;
	int namelen, thislen;

	if (bh == NULL) {
		printk(KERN_WARNING "qnx4: matching unassigned buffer !\n");
		return 0;
	}
	de = (struct qnx4_inode_entry *) (bh->b_data + *offset);
	*offset += QNX4_DIR_ENTRY_SIZE;
	if ((de->di_status & QNX4_FILE_LINK) != 0) {
		namelen = QNX4_NAME_MAX;
	} else {
		namelen = QNX4_SHORT_NAME_MAX;
	}
	thislen = strlen( de->di_fname );
	if ( thislen > namelen )
		thislen = namelen;
	if (len != thislen) {
		return 0;
	}
	if (strncmp(name, de->di_fname, len) == 0) {
		if ((de->di_status & (QNX4_FILE_USED|QNX4_FILE_LINK)) != 0) {
			return 1;
		}
	}
	return 0;
}

static struct buffer_head *qnx4_find_entry(int len, struct inode *dir,
	   const char *name, struct qnx4_inode_entry **res_dir, int *ino)
{
	unsigned long block, offset, blkofs;
	struct buffer_head *bh;

	*res_dir = NULL;
	bh = NULL;
	block = offset = blkofs = 0;
	while (blkofs * QNX4_BLOCK_SIZE + offset < dir->i_size) {
		if (!bh) {
			block = qnx4_block_map(dir, blkofs);
			if (block)
				bh = sb_bread(dir->i_sb, block);
			if (!bh) {
				blkofs++;
				continue;
			}
		}
		*res_dir = (struct qnx4_inode_entry *) (bh->b_data + offset);
		if (qnx4_match(len, name, bh, &offset)) {
			*ino = block * QNX4_INODES_PER_BLOCK +
			    (offset / QNX4_DIR_ENTRY_SIZE) - 1;
			return bh;
		}
		if (offset < bh->b_size) {
			continue;
		}
		brelse(bh);
		bh = NULL;
		offset = 0;
		blkofs++;
	}
	brelse(bh);
	*res_dir = NULL;
	return NULL;
}

struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
	int ino;
	struct qnx4_inode_entry *de;
	struct qnx4_link_info *lnk;
	struct buffer_head *bh;
	const char *name = dentry->d_name.name;
	int len = dentry->d_name.len;
	struct inode *foundinode = NULL;

	if (!(bh = qnx4_find_entry(len, dir, name, &de, &ino)))
		goto out;
	/* The entry is linked, let's get the real info */
	if ((de->di_status & QNX4_FILE_LINK) == QNX4_FILE_LINK) {
		lnk = (struct qnx4_link_info *) de;
		ino = (le32_to_cpu(lnk->dl_inode_blk) - 1) *
                    QNX4_INODES_PER_BLOCK +
		    lnk->dl_inode_ndx;
	}
	brelse(bh);

	foundinode = qnx4_iget(dir->i_sb, ino);
	if (IS_ERR(foundinode)) {
		QNX4DEBUG((KERN_ERR "qnx4: lookup->iget -> error %ld\n",
			   PTR_ERR(foundinode)));
		return ERR_CAST(foundinode);
	}
out:
	d_add(dentry, foundinode);

	return NULL;
}
nchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Tobias Klauser &lt;tklauser@distanz.ch&gt;</td><td class='right'>2016-10-20 15:44:19 +0200</td></tr>
<tr><th>committer</th><td>Tobias Klauser &lt;tklauser@distanz.ch&gt;</td><td class='right'>2017-02-15 10:34:18 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/intel_txt.txt?h=nds-private-remove&amp;id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>5db4992d8f040b8d8db0b86d42806e0c417f7ccf</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/intel_txt.txt?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove'>5b06e952af482d45f3ade64e77824662e34b7fa2</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/intel_txt.txt?h=nds-private-remove'>Documentation/intel_txt.txt</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/intel_txt.txt?h=nds-private-remove&amp;id=370ebb0ef6255132373ed35d13e7b1d8d2eb7003'>370ebb0ef6255132373ed35d13e7b1d8d2eb7003</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/intel_txt.txt?h=nds-private-remove&amp;id2=370ebb0ef6255132373ed35d13e7b1d8d2eb7003'>diff</a>)</td></tr></table>
<div class='commit-subject'>usbnet: pegasus: Use net_device_stats from struct net_device<span class='decoration'><a class='branch-deco' href='/cgit.cgi/linux/net-next.git/log/Documentation/intel_txt.txt?h=nds-private-remove'>nds-private-remove</a></span></div><div class='commit-msg'>Instead of using a private copy of struct net_device_stats in struct
pegasus, use stats from struct net_device. Also remove the now
unnecessary .ndo_get_stats function.

Cc: Petko Manolov &lt;petkan@nucleusys.com&gt;
Cc: linux-usb@vger.kernel.org
Signed-off-by: Tobias Klauser &lt;tklauser@distanz.ch&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove'>Diffstat</a> (limited to 'Documentation/intel_txt.txt')</div><table summary='diffstat' class='diffstat'>