#include "ubifs.h"

static int ubifs_crypt_get_context(struct inode *inode, void *ctx, size_t len)
{
	return ubifs_xattr_get(inode, UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT,
			       ctx, len);
}

static int ubifs_crypt_set_context(struct inode *inode, const void *ctx,
				   size_t len, void *fs_data)
{
	return ubifs_xattr_set(inode, UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT,
			       ctx, len, 0);
}

static bool ubifs_crypt_empty_dir(struct inode *inode)
{
	return ubifs_check_dir_empty(inode) == 0;
}

static unsigned int ubifs_crypt_max_namelen(struct inode *inode)
{
	if (S_ISLNK(inode->i_mode))
		return UBIFS_MAX_INO_DATA;
	else
		return UBIFS_MAX_NLEN;
}

static int ubifs_key_prefix(struct inode *inode, u8 **key)
{
	static char prefix[] = "ubifs:";

	*key = prefix;

	return sizeof(prefix) - 1;
}

int ubifs_encrypt(const struct inode *inode, struct ubifs_data_node *dn,
		  unsigned int in_len, unsigned int *out_len, int block)
{
	struct ubifs_info *c = inode->i_sb->s_fs_info;
	void *p = &dn->data;
	struct page *ret;
	unsigned int pad_len = round_up(in_len, UBIFS_CIPHER_BLOCK_SIZE);

	ubifs_assert(pad_len <= *out_len);
	dn->compr_size = cpu_to_le16(in_len);

	/* pad to full block cipher length */
	if (pad_len != in_len)
		memset(p + in_len, 0, pad_len - in_len);

	ret = fscrypt_encrypt_page(inode, virt_to_page(&dn->data), pad_len,
			offset_in_page(&dn->data), block, GFP_NOFS);
	if (IS_ERR(ret)) {
		ubifs_err(c, "fscrypt_encrypt_page failed: %ld", PTR_ERR(ret));
		return PTR_ERR(ret);
	}
	*out_len = pad_len;

	return 0;
}

int ubifs_decrypt(const struct inode *inode, struct ubifs_data_node *dn,
		  unsigned int *out_len, int block)
{
	struct ubifs_info *c = inode->i_sb->s_fs_info;
	int err;
	unsigned int clen = le16_to_cpu(dn->compr_size);
	unsigned int dlen = *out_len;

	if (clen <= 0 || clen > UBIFS_BLOCK_SIZE || clen > dlen) {
		ubifs_err(c, "bad compr_size: %i", clen);
		return -EINVAL;
	}

	ubifs_assert(dlen <= UBIFS_BLOCK_SIZE);
	err = fscrypt_decrypt_page(inode, virt_to_page(&dn->data), dlen,
			offset_in_page(&dn->data), block);
	if (err) {
		ubifs_err(c, "fscrypt_decrypt_page failed: %i", err);
		return err;
	}
	*out_len = clen;

	return 0;
}

struct fscrypt_operations ubifs_crypt_operations = {
	.flags			= FS_CFLG_OWN_PAGES,
	.get_context		= ubifs_crypt_get_context,
	.set_context		= ubifs_crypt_set_context,
	.is_encrypted		= __ubifs_crypt_is_encrypted,
	.empty_dir		= ubifs_crypt_empty_dir,
	.max_namelen		= ubifs_crypt_max_namelen,
	.key_prefix		= ubifs_key_prefix,
};
ion value='author'>author</option>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=c9194b99ae1825bdbafc701965442a47739ff0ad'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=c9194b99ae1825bdbafc701965442a47739ff0ad'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=c9194b99ae1825bdbafc701965442a47739ff0ad'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/usbip?id=c9194b99ae1825bdbafc701965442a47739ff0ad'>usbip</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/usbip/usbip_common.h?id=c9194b99ae1825bdbafc701965442a47739ff0ad'>usbip_common.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c9194b99ae1825bdbafc701965442a47739ff0ad'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-31 13:05:15 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-31 13:05:15 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/usbip/usbip_common.h?id=c9194b99ae1825bdbafc701965442a47739ff0ad'>c9194b99ae1825bdbafc701965442a47739ff0ad</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/usbip/usbip_common.h?id=c9194b99ae1825bdbafc701965442a47739ff0ad'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c9194b99ae1825bdbafc701965442a47739ff0ad'>76dbb4da02aea1ba8bd886b7b2c53fdb26202710</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/usbip/usbip_common.h?id=c9194b99ae1825bdbafc701965442a47739ff0ad'>drivers/usb/usbip/usbip_common.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/usbip/usbip_common.h?id=415f9b71d17d294c2f2075b3fc7717d72e5e48f9'>415f9b71d17d294c2f2075b3fc7717d72e5e48f9</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/usbip/usbip_common.h?id=c9194b99ae1825bdbafc701965442a47739ff0ad&amp;id2=415f9b71d17d294c2f2075b3fc7717d72e5e48f9'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/usbip/usbip_common.h?id=8e9faa15469ed7c7467423db4c62aeed3ff4cae3'>8e9faa15469ed7c7467423db4c62aeed3ff4cae3</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/usbip/usbip_common.h?id=c9194b99ae1825bdbafc701965442a47739ff0ad&amp;id2=8e9faa15469ed7c7467423db4c62aeed3ff4cae3'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid</div><div class='commit-msg'>Pull HID fixes from Jiri Kosina:

 - regression fix (sleeping while atomic) for cp2112, from Johan Hovold

 - regression fix for proximity handling under certain circumstances in
   Wacom driver, from Jason Gerecke

 - functional fix for Logitech Rumblepad 2, from Ardinartsev Nikita

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
  HID: cp2112: fix gpio-callback error handling
  HID: cp2112: fix sleep-while-atomic
  HID: hid-lg: Fix immediate disconnection of Logitech Rumblepad 2
  HID: usbhid: Quirk a AMI virtual mouse and keyboard with ALWAYS_POLL
  HID: wacom: Fix poor prox handling in 'wacom_pl_irq'
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c9194b99ae1825bdbafc701965442a47739ff0ad'>Diffstat</a> (limited to 'drivers/usb/usbip/usbip_common.h')</div><table summary='diffstat' class='diffstat'>