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The LITMUS^RT kernel.

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author	Al Viro <viro@zeniv.linux.org.uk>	2005-12-06 05:53:04 -0500
committer	Al Viro <viro@zeniv.linux.org.uk>	2006-01-28 21:42:25 -0500
commit	82729971e0f8ccf1f15567cc4f2c5389e0659eb2 (patch)
tree	1618283083d7b6b5c035e183b555aaa8a90f8480 /drivers/net/7990.c
parent	ded5ca1f3b9ffa464fe5d4744fd09bba753ff4b7 (diff)

[PATCH] missing include of asm/irq.h in drivers/net

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Diffstat (limited to 'drivers/net/7990.c')

0 files changed, 0 insertions, 0 deletions

lass='sha1'>f58841666bc2

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/*
 *   fs/cifs/readdir.c
 *
 *   Directory search handling
 *
 *   Copyright (C) International Business Machines  Corp., 2004, 2008
 *   Author(s): Steve French (sfrench@us.ibm.com)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_unicode.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
#include "cifsfs.h"

/*
 * To be safe - for UCS to UTF-8 with strings loaded with the rare long
 * characters alloc more to account for such multibyte target UTF-8
 * characters.
 */
#define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2)

#ifdef CONFIG_CIFS_DEBUG2
static void dump_cifs_file_struct(struct file *file, char *label)
{
	struct cifsFileInfo *cf;

	if (file) {
		cf = file->private_data;
		if (cf == NULL) {
			cFYI(1, "empty cifs private file data");
			return;
		}
		if (cf->invalidHandle)
			cFYI(1, "invalid handle");
		if (cf->srch_inf.endOfSearch)
			cFYI(1, "end of search");
		if (cf->srch_inf.emptyDir)
			cFYI(1, "empty dir");
	}
}
#else
static inline void dump_cifs_file_struct(struct file *file, char *label)
{
}
#endif /* DEBUG2 */

/*
 * Find the dentry that matches "name". If there isn't one, create one. If it's
 * a negative dentry or the uniqueid changed, then drop it and recreate it.
 */
static struct dentry *
cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
		    struct cifs_fattr *fattr)
{
	struct dentry *dentry, *alias;
	struct inode *inode;
	struct super_block *sb = parent->d_inode->i_sb;

	cFYI(1, "For %s", name->name);

	if (parent->d_op && parent->d_op->d_hash)
		parent->d_op->d_hash(parent, name);
	else
		name->hash = full_name_hash(name->name, name->len);

	dentry = d_lookup(parent, name);
	if (dentry) {
		/* FIXME: check for inode number changes? */
		if (dentry->d_inode != NULL)
			return dentry;
		d_drop(dentry);
		dput(dentry);
	}

	dentry = d_alloc(parent, name);
	if (dentry == NULL)
		return NULL;

	inode = cifs_iget(sb, fattr);
	if (!inode) {
		dput(dentry);
		return NULL;
	}

	if (CIFS_SB(sb)->tcon->nocase)
		dentry->d_op = &cifs_ci_dentry_ops;
	else
		dentry->d_op = &cifs_dentry_ops;

	alias = d_materialise_unique(dentry, inode);
	if (alias != NULL) {
		dput(dentry);
		if (IS_ERR(alias))
			return NULL;
		dentry = alias;
	}

	return dentry;
}

static void
cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
{
	fattr->cf_uid = cifs_sb->mnt_uid;
	fattr->cf_gid = cifs_sb->mnt_gid;

	if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
		fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
		fattr->cf_dtype = DT_DIR;
	} else {
		fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
		fattr->cf_dtype = DT_REG;
	}

	if (fattr->cf_cifsattrs & ATTR_READONLY)
		fattr->cf_mode &= ~S_IWUGO;

	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
	    fattr->cf_cifsattrs & ATTR_SYSTEM) {
		if (fattr->cf_eof == 0)  {
			fattr->cf_mode &= ~S_IFMT;
			fattr->cf_mode |= S_IFIFO;
			fattr->cf_dtype = DT_FIFO;
		} else {
			/*
			 * trying to get the type and mode via SFU can be slow,
			 * so just call those regular files for now, and mark
			 * for reval
			 */
			fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
		}
	}
}

static void
cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
		       struct cifs_sb_info *cifs_sb)
{
	memset(fattr, 0, sizeof(*fattr));
	fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
	fattr->cf_eof = le64_to_cpu(info->EndOfFile);
	fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
	fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
	fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
	fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);

	cifs_fill_common_info(fattr, cifs_sb);
}

static void
cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
		       struct cifs_sb_info *cifs_sb)
{
	int offset = cifs_sb->tcon->ses->server->timeAdj;

	memset(fattr, 0, sizeof(*fattr));
	fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
					    info->LastAccessTime, offset);
	fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
					    info->LastWriteTime, offset);
	fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
					    info->LastWriteTime, offset);

	fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
	fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
	fattr->cf_eof = le32_to_cpu(info->DataSize);

	cifs_fill_common_info(fattr, cifs_sb);
}

/* BB eventually need to add the following helper function to
      resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
      we try to do FindFirst on (NTFS) directory symlinks */
/*
int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
			     int xid)
{
	__u16 fid;
	int len;
	int oplock = 0;
	int rc;
	struct cifsTconInfo *ptcon = cifs_sb->tcon;
	char *tmpbuffer;

	rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
			OPEN_REPARSE_POINT, &fid, &oplock, NULL,
			cifs_sb->local_nls,
			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
	if (!rc) {
		tmpbuffer = kmalloc(maxpath);
		rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
				tmpbuffer,
				maxpath -1,
				fid,
				cifs_sb->local_nls);
		if (CIFSSMBClose(xid, ptcon, fid)) {
			cFYI(1, "Error closing temporary reparsepoint open");
		}
	}
}
 */

static int initiate_cifs_search(const int xid, struct file *file)
{
	int rc = 0;
	char *full_path;
	struct cifsFileInfo *cifsFile;
	struct cifs_sb_info *cifs_sb;
	struct cifsTconInfo *pTcon;

	if (file->private_data == NULL) {
		file->private_data =
			kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
	}

	if (file->private_data == NULL)
		return -ENOMEM;
	cifsFile = file->private_data;
	cifsFile->invalidHandle = true;
	cifsFile->srch_inf.endOfSearch = false;

	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
	if (cifs_sb == NULL)
		return -EINVAL;

	pTcon = cifs_sb->tcon;
	if (pTcon == NULL)
		return -EINVAL;

	full_path = build_path_from_dentry(file->f_path.dentry);

	if (full_path == NULL)
		return -ENOMEM;

	cFYI(1, "Full path: %s start at: %lld", full_path, file->f_pos);

ffirst_retry:
	/* test for Unix extensions */
	/* but now check for them on the share/mount not on the SMB session */
/*	if (pTcon->ses->capabilities & CAP_UNIX) { */
	if (pTcon->unix_ext)
		cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
	else if ((pTcon->ses->capabilities &
			(CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
		cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
	} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
		cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
	} else /* not srvinos - BB fixme add check for backlevel? */ {
		cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
	}

	rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
		&cifsFile->netfid, &cifsFile->srch_inf,
		cifs_sb->mnt_cifs_flags &
			CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
	if (rc == 0)
		cifsFile->invalidHandle = false;
	/* BB add following call to handle readdir on new NTFS symlink errors
	else if STATUS_STOPPED_ON_SYMLINK
		call get_symlink_reparse_path and retry with new path */
	else if ((rc == -EOPNOTSUPP) &&
		(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
		goto ffirst_retry;
	}
	kfree(full_path);
	return rc;
}

/* return length of unicode string in bytes */
static int cifs_unicode_bytelen(char *str)
{
	int len;
	__le16 *ustr = (__le16 *)str;

	for (len = 0; len <= PATH_MAX; len++) {
		if (ustr[len] == 0)
			return len << 1;
	}
	cFYI(1, "Unicode string longer than PATH_MAX found");
	return len << 1;
}

static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
{
	char *new_entry;
	FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;

	if (level == SMB_FIND_FILE_INFO_STANDARD) {
		FIND_FILE_STANDARD_INFO *pfData;
		pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;

		new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
				pfData->FileNameLength;
	} else
		new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
	cFYI(1, "new entry %p old entry %p", new_entry, old_entry);
	/* validate that new_entry is not past end of SMB */
	if (new_entry >= end_of_smb) {
		cERROR(1, "search entry %p began after end of SMB %p old entry %p",
			new_entry, end_of_smb, old_entry);
		return NULL;
	} else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
		    (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
		  || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
		   (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb)))  {
		cERROR(1, "search entry %p extends after end of SMB %p",
			new_entry, end_of_smb);
		return NULL;
	} else
		return new_entry;

}

#define UNICODE_DOT cpu_to_le16(0x2e)

/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
{
	int rc = 0;
	char *filename = NULL;
	int len = 0;

	if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
		FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
		filename = &pFindData->FileName[0];
		if (cfile->srch_inf.unicode) {
			len = cifs_unicode_bytelen(filename);
		} else {
			/* BB should we make this strnlen of PATH_MAX? */
			len = strnlen(filename, 5);
		}
	} else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
		FILE_DIRECTORY_INFO *pFindData =
			(FILE_DIRECTORY_INFO *)current_entry;
		filename = &pFindData->FileName[0];
		len = le32_to_cpu(pFindData->FileNameLength);
	} else if (cfile->srch_inf.info_level ==
			SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
		FILE_FULL_DIRECTORY_INFO *pFindData =
			(FILE_FULL_DIRECTORY_INFO *)current_entry;
		filename = &pFindData->FileName[0];
		len = le32_to_cpu(pFindData->FileNameLength);
	} else if (cfile->srch_inf.info_level ==
			SMB_FIND_FILE_ID_FULL_DIR_INFO) {
		SEARCH_ID_FULL_DIR_INFO *pFindData =
			(SEARCH_ID_FULL_DIR_INFO *)current_entry;
		filename = &pFindData->FileName[0];
		len = le32_to_cpu(pFindData->FileNameLength);
	} else if (cfile->srch_inf.info_level ==
			SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
		FILE_BOTH_DIRECTORY_INFO *pFindData =
			(FILE_BOTH_DIRECTORY_INFO *)current_entry;
		filename = &pFindData->FileName[0];
		len = le32_to_cpu(pFindData->FileNameLength);
	} else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
		FIND_FILE_STANDARD_INFO *pFindData =
			(FIND_FILE_STANDARD_INFO *)current_entry;


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