[patch][3/3] ioctl calls for Named Pipes

[Shirish Pargaonkar]

ioctl calls to invoke SMBTrans functions/transactions

From ce2bf9594358470e4bcb0822b0d3777620c023f7 Mon Sep 17 00:00:00 2001
From: Shirish Pargaonkar <shirishpargaonkar@...>
Date: Thu, 15 Oct 2009 08:17:37 -0500
Subject: [PATCH] ioctl functions for Named Pipe support

---
 fs/cifs/ioctl.c |   74 ++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 70 insertions(+), 4 deletions(-)

diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index f946506..d351321 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -30,11 +30,46 @@

 #define CIFS_IOC_CHECKUMOUNT _IO(0xCF, 2)

+int
+ChkNMPHmode(unsigned short smode)
+{
+ int rc = -1;
+
+ if ((smode & BYTESTREAMNMREAD) && (smode & MESSAGENMREAD)) {
+ cFYI(1, ("SetNMPHMode both bye and message read bytes set"));
+ return rc;
+ }
+ if ((smode & BLOCKINGNMPIPE) && (smode & NONBLOCKINGNMPIPE))
+ return rc;
+
+ return 0;
+}
+
+unsigned short
+SetNMPHmode(unsigned short smode, unsigned short cmode)
+{
+ unsigned short mode;
+
+ mode = cmode;
+
+ if (smode & NONBLOCKINGNMPIPE)
+ mode = mode & 0x7FFF;
+ if (smode & BLOCKINGNMPIPE)
+ mode = mode | 0x8000;
+ if (smode & BYTESTREAMNMREAD)
+ mode = mode & 0xFCFF;
+ if (smode & MESSAGENMREAD)
+ mode = mode | 0x0100;
+
+ return mode;
+}
+
 long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
 {
  struct inode *inode = filep->f_dentry->d_inode;
  int rc = -ENOTTY; /* strange error - but the precedent */
  int xid;
+ unsigned short cmode, smode;
  struct cifs_sb_info *cifs_sb;
 #ifdef CONFIG_CIFS_POSIX
  __u64 ExtAttrBits = 0;
@@ -60,6 +95,12 @@ long cifs_ioctl(struct file *filep, unsigned int
command, unsigned long arg)
  FreeXid(xid);
  return -EIO;
  }
+
+ if (!pSMBFile && (command != CIFS_IOC_CHECKUMOUNT)) {
+ cFYI(1, ("cifs_ioctl: NULL file pointer"));
+ FreeXid(xid);
+ return -EBADF;
+ }
 #endif /* CONFIG_CIFS_POSIX */

  switch (command) {
@@ -75,8 +116,6 @@ long cifs_ioctl(struct file *filep, unsigned int
command, unsigned long arg)
 #ifdef CONFIG_CIFS_POSIX
  case FS_IOC_GETFLAGS:
  if (CIFS_UNIX_EXTATTR_CAP & caps) {
- if (pSMBFile == NULL)
- break;
  rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid,
  &ExtAttrBits, &ExtAttrMask);
  if (rc == 0)
@@ -92,14 +131,41 @@ long cifs_ioctl(struct file *filep, unsigned int
command, unsigned long arg)
  rc = -EFAULT;
  break;
  }
- if (pSMBFile == NULL)
- break;
  /* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid,
  extAttrBits, &ExtAttrMask);*/
  }
  cFYI(1, ("set flags not implemented yet"));
  break;
 #endif /* CONFIG_CIFS_POSIX */
+ case CIFS_QUERYNMPIPE:
+ rc = CIFSSMBTransQNmPipe(xid, tcon, arg,
+ pSMBFile->netfid, cifs_sb->local_nls, 0);
+ break;
+ case CIFS_PEEKNMPIPE:
+ rc = CIFSSMBTransPeekNmPipe(xid, tcon, arg,
+ pSMBFile->netfid, cifs_sb->local_nls, 0);
+ break;
+ case CIFS_GETNMPIPEHANDSTATE:
+ rc = CIFSSMBTransGetNmPHState(xid, tcon, arg,
+ pSMBFile->netfid, cifs_sb->local_nls, 0);
+ break;
+ case CIFS_SETNMPIPEHANDSTATE:
+ smode = ((struct qnmp_hinfo *)arg)->mode;
+ if (ChkNMPHmode(smode) == -1)
+ break;
+ rc = CIFSSMBTransGetNmPHState(xid, tcon, arg,
+ pSMBFile->netfid, cifs_sb->local_nls, 0);
+ if (rc)
+ break;
+ cmode = ((struct qnmp_hinfo *)arg)->mode;
+ ((struct qnmp_hinfo *)arg)->mode =
+ SetNMPHmode(smode, cmode);
+ rc = CIFSSMBTransSetNmPHState(xid, tcon, arg,
+ pSMBFile->netfid, cifs_sb->local_nls, 0);
+ break;
+ case CIFS_TRANSACTNMPIPE:
+ rc = CIFSSMBTransNmPipe(xid, tcon, (char *)arg,
+ pSMBFile->netfid, cifs_sb->local_nls, 0);
  default:
  cFYI(1, ("unsupported ioctl"));
  break;
--
1.5.2
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