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create.c
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/***************************************************************************
*
* Copyright (c) 1997-2022 Jeff V. Merkey
* 7260 SE Tenino St.
* Portland, Oregon 97206
* jeffmerkey@gmail.com
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the Lesser GNU Public License as published by the
* Free Software Foundation, version 2.1, or any later version.
*
* This program 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
* General Public License for more details.
*
* Original Authorship :
* source code written by Jeff V. Merkey
*
* Original Contributors :
* Jeff V. Merkey
*
*
*
****************************************************************************
*
*
* AUTHOR : Jeff V. Merkey (jeffmerkey@gmail.com)
* FILE : CREATE.C
* DESCRIP : VFS Directory Create Module for Linux
* DATE : January 26, 2022
*
*
***************************************************************************/
#include "globals.h"
#if (LINUX_24)
ULONG nwfs_to_linux_error(ULONG NwfsError)
{
switch (NwfsError)
{
case NwSuccess:
return 0;
case NwFatCorrupt:
case NwFileCorrupt:
case NwDirectoryCorrupt:
case NwVolumeCorrupt:
case NwHashCorrupt:
case NwMissingSegment:
return -ENFILE;
case NwHashError:
case NwNoEntry:
return -ENOENT;
case NwDiskIoError:
case NwMirrorGroupFailure:
case NwNoMoreMirrors:
return -EIO;
case NwInsufficientResources:
return -ENOMEM;
case NwFileExists:
return -EEXIST;
case NwInvalidParameter:
case NwBadName:
return -EINVAL;
case NwVolumeFull:
return -ENOSPC;
case NwNotEmpty:
return -ENOTEMPTY;
case NwAccessError:
return -EACCES;
case NwNotPermitted:
return -EPERM;
case NwMemoryFault:
return -EFAULT;
case NwOtherError:
case NwEndOfFile:
default:
return -EACCES;
}
}
int nwfs_create(struct inode *dir, struct dentry *dentry, int mode)
{
const char *name = dentry->d_name.name;
size_t namelen = dentry->d_name.len;
register VOLUME *volume = (VOLUME *) dir->i_sb->u.generic_sbp;
register HASH *hash = (HASH *) dir->u.generic_ip;
register ULONG retCode;
ULONG DirNo;
register struct inode *inode;
register ino_t ino;
#if (VFS_VERBOSE)
NWFSPrint("create %s\n", dentry->d_name.name);
#endif
if (!dir || !S_ISDIR(dir->i_mode))
{
NWFSPrint("nwfs: inode is NULL or not a directory in create\n");
return -ENOENT;
}
if (!hash)
return -ENOENT;
// if there is a name collision, then report that the file exists
ino = get_directory_number(volume, name, namelen, dir->i_ino);
if (ino)
return -EEXIST;
retCode = NWCreateDirectoryEntry(volume, (BYTE *)name, namelen,
0, dir->i_ino,
NW_NAMED_FILE,
current->fsuid,
((dir->i_mode & S_ISGID)
? dir->i_gid
: current->fsgid),
0, mode,
&DirNo,
(ULONG) -1, 0,
(ULONG) -1, 0,
0, 0);
if (retCode)
return (nwfs_to_linux_error(retCode));
if (!(inode = iget(dir->i_sb, DirNo)) < 0)
{
NWFSPrint("nwfs: iget failed in create\n");
return -EBADF;
}
inode->i_uid = current->fsuid;
inode->i_gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
mark_inode_dirty(inode);
// bump directory link count and size
dir->i_mtime = NWFSGetSystemTime();
dir->i_nlink++;
dir->i_size += sizeof(ROOT);
mark_inode_dirty(dir);
d_instantiate(dentry, inode);
return 0;
}
int nwfs_unlink(struct inode *dir, struct dentry *dentry)
{
const char *name = dentry->d_name.name;
size_t namelen = dentry->d_name.len;
register struct inode *inode = dentry->d_inode;
register VOLUME *volume = (VOLUME *) dir->i_sb->u.generic_sbp;
register HASH *hash;
register ULONG retCode;
register ino_t ino;
DOS dosst;
register DOS *dos = &dosst;
#if (VFS_VERBOSE)
NWFSPrint("unlink %s\n", name);
#endif
if (!dir || !S_ISDIR(dir->i_mode))
{
NWFSPrint("nwfs: inode is NULL or not a directory\n");
return -EBADF;
}
hash = get_directory_hash(volume, name, namelen, dir->i_ino);
if (!hash)
return -ENOENT;
ino = hash->DirNo;
retCode = ReadDirectoryRecord(volume, dos, ino);
if (retCode)
{
NWFSPrint("nwfs: inode number (%d) read dir error [%d] (unlink)\n",
(int)ino, (int)retCode);
return -EIO;
}
#if (SALVAGEABLE_FS)
retCode = NWShadowDirectoryEntry(volume, dos, hash);
if (retCode)
return nwfs_to_linux_error(retCode);
#else
if (hash->Flags & HARD_LINKED_FILE)
{
retCode = NWDeleteDirectoryEntry(volume, dos, hash);
if (retCode)
return nwfs_to_linux_error(retCode);
}
else
{
retCode = NWDeleteDirectoryEntryAndData(volume, dos, hash);
if (retCode)
return nwfs_to_linux_error(retCode);
}
#endif
// adjust directory link count and size
dir->i_ctime = dir->i_mtime = NWFSGetSystemTime();
if (dir->i_nlink)
dir->i_nlink--;
if (dir->i_size)
dir->i_size -= sizeof(ROOT);
mark_inode_dirty(dir);
inode->i_nlink--;
inode->i_ctime = dir->i_ctime;
mark_inode_dirty(inode);
d_delete(dentry);
return 0;
}
int nwfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
const char *name = dentry->d_name.name;
size_t namelen = dentry->d_name.len;
register VOLUME *volume = (VOLUME *) dir->i_sb->u.generic_sbp;
register HASH *hash = (HASH *) dir->u.generic_ip;
register ULONG retCode;
ULONG DirNo;
register struct inode *inode;
register ino_t ino;
#if (VFS_VERBOSE)
NWFSPrint("mkdir %s\n", dentry->d_name.name);
#endif
if (!dir || !S_ISDIR(dir->i_mode))
{
NWFSPrint("nwfs: inode is NULL or not a directory in mkdir\n");
return -ENOTDIR;
}
if (!hash)
return -ENOENT;
// if there is a name collision, then report that the directory exists
ino = get_directory_number(volume, name, namelen, dir->i_ino);
if (ino)
return -EEXIST;
retCode = NWCreateDirectoryEntry(volume, (BYTE *)name, namelen,
SUBDIRECTORY, dir->i_ino,
NW_SUBDIRECTORY_FILE,
current->fsuid,
((dir->i_mode & S_ISGID)
? dir->i_gid
: current->fsgid),
0, mode, &DirNo,
(ULONG) -1, 0,
(ULONG) -1, 0,
0, 0);
if (retCode)
return (nwfs_to_linux_error(retCode));
if (!(inode = iget(dir->i_sb, DirNo)) < 0)
{
NWFSPrint("nwfs: iget failed in mkdir\n");
return -EINVAL;
}
inode->i_uid = current->fsuid;
inode->i_gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
mark_inode_dirty(inode);
// bump directory link count and size
dir->i_mtime = NWFSGetSystemTime();
dir->i_nlink++;
dir->i_size += sizeof(ROOT);
mark_inode_dirty(dir);
d_instantiate(dentry, inode);
return 0;
}
int nwfs_rmdir(struct inode *dir, struct dentry *dentry)
{
const char *name = dentry->d_name.name;
size_t namelen = dentry->d_name.len;
register struct inode *inode = dentry->d_inode;
register VOLUME *volume = (VOLUME *) dir->i_sb->u.generic_sbp;
register HASH *dirhash = (HASH *) dir->u.generic_ip;
register HASH *hash;
register ULONG retCode;
register ino_t ino;
DOS dosst;
register DOS *dos = &dosst;
#if (VFS_VERBOSE)
NWFSPrint("rmdir %s\n", name);
#endif
if (!dir || !S_ISDIR(dir->i_mode))
{
NWFSPrint("nwfs: inode is NULL or not a directory\n");
return -ENOTDIR;
}
if (!dirhash)
return -ENOENT;
hash = get_directory_hash(volume, name, namelen, dir->i_ino);
if (!hash)
return -ENOENT;
ino = hash->DirNo;
// don't allow DELETED.SAV to be removed from the root directory
if ((!hash->Parent) && (!NWFSCompare((BYTE *)name, "DELETED.SAV", 11)))
return -EPERM;
retCode = ReadDirectoryRecord(volume, dos, ino);
if (retCode)
return -EIO;
#if (SALVAGEABLE_FS)
retCode = NWShadowDirectoryEntry(volume, dos, hash);
if (retCode)
return nwfs_to_linux_error(retCode);
#else
// really delete the file from the volume
retCode = NWDeleteDirectoryEntryAndData(volume, dos, hash);
if (retCode)
return nwfs_to_linux_error(retCode);
#endif
// adjust directory link count and size
dir->i_mtime = NWFSGetSystemTime();
if (dir->i_nlink)
dir->i_nlink--;
if (dir->i_size)
dir->i_size -= sizeof(ROOT);
mark_inode_dirty(dir);
// if we are deleting the last instance of a busy directory
// then make directory empty
inode->i_nlink = 0; // zap the link count
inode->i_size = 0;
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
mark_inode_dirty(inode);
d_delete(dentry);
return 0;
}
int nwfs_rename(struct inode *oldDir, struct dentry *old_dentry,
struct inode *newDir, struct dentry *new_dentry)
{
const char *newName = new_dentry->d_name.name;
size_t newLen = new_dentry->d_name.len;
const char *oldName = old_dentry->d_name.name;
size_t oldLen = old_dentry->d_name.len;
register VOLUME *volume = (VOLUME *) oldDir->i_sb->u.generic_sbp;
register HASH *odirhash = (HASH *) oldDir->u.generic_ip;
register HASH *ndirhash = (HASH *) newDir->u.generic_ip;
register HASH *hash;
register ULONG retCode, oldDirNo, newDirNo;
register ino_t ino;
DOS dosst;
register DOS *dos = &dosst;
#if (VFS_VERBOSE)
NWFSPrint("rename %s -> %s\n", old_dentry->d_name.name,
new_dentry->d_name.name);
#endif
if (!oldDir || !S_ISDIR(oldDir->i_mode))
{
NWFSPrint("nwfs: old inode is NULL or not a directory\n");
return -EBADF;
}
if (!newDir || !S_ISDIR(newDir->i_mode))
{
NWFSPrint("nwfs_rename: new inode is NULL or not a directory\n");
return -EBADF;
}
if (!odirhash)
return -ENOENT;
if (!ndirhash)
return -ENOENT;
oldDirNo = odirhash->DirNo;
newDirNo = ndirhash->DirNo;
// if there is a name collision, then remove the target file
ino = get_directory_number(volume, newName, newLen, newDir->i_ino);
if (ino)
{
retCode = nwfs_unlink(newDir, new_dentry);
if (retCode)
return retCode;
}
hash = get_directory_hash(volume, oldName, oldLen, oldDir->i_ino);
if (!hash)
return -ENOENT;
// read source file record
retCode = ReadDirectoryRecord(volume, dos, oldDir->i_ino);
if (retCode)
return -EIO;
retCode = NWRenameEntry(volume, dos, hash, (BYTE *)newName, newLen,
newDir->i_ino);
if (retCode)
return (nwfs_to_linux_error(retCode));
// adjust old directory link count and size
oldDir->i_mtime = NWFSGetSystemTime();
if (oldDir->i_nlink)
oldDir->i_nlink--;
if (oldDir->i_size)
oldDir->i_size -= sizeof(ROOT);
mark_inode_dirty(oldDir);
// bump new directory link count and size
newDir->i_mtime = NWFSGetSystemTime();
newDir->i_nlink++;
newDir->i_size += sizeof(ROOT);
mark_inode_dirty(newDir);
return 0;
}
int nwfs_symlink(struct inode *dir, struct dentry *dentry, const char *path)
{
const char *name = dentry->d_name.name;
size_t namelen = dentry->d_name.len;
register VOLUME *volume = (VOLUME *) dir->i_sb->u.generic_sbp;
register HASH *hash = (HASH *) dir->u.generic_ip;
register ULONG retCode;
ULONG DirNo;
register struct inode *inode;
register ino_t ino;
#if (VFS_VERBOSE)
NWFSPrint("symlink %s\n", dentry->d_name.name);
#endif
// don't allow symlinks unless the NFS namespace is present
if (volume->NameSpaceDefault != UNIX_NAME_SPACE)
return -EPERM;
if (!dir || !S_ISDIR(dir->i_mode))
{
NWFSPrint("nwfs: inode is NULL or not a directory in symlink\n");
return -EBADF;
}
if (!hash)
return -ENOENT;
// if there is a name collision, then report that the file exists
ino = get_directory_number(volume, name, namelen, dir->i_ino);
if (ino)
return -EEXIST;
retCode = NWCreateDirectoryEntry(volume, (BYTE *)name, namelen,
0, dir->i_ino,
NW_SYMBOLIC_FILE,
current->fsuid,
((dir->i_mode & S_ISGID)
? dir->i_gid
: current->fsgid),
0,
(S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO),
&DirNo,
(ULONG) -1, 0,
(ULONG) -1, 0,
path, strlen(path));
if (retCode)
return (nwfs_to_linux_error(retCode));
if (!(inode = iget(dir->i_sb, DirNo)) < 0)
{
NWFSPrint("nwfs: iget failed in symlink\n");
return -EBADF;
}
// bump directory link count and size
dir->i_mtime = NWFSGetSystemTime();
dir->i_nlink++;
dir->i_size += sizeof(ROOT);
mark_inode_dirty(dir);
d_instantiate(dentry, inode);
return 0;
}
int nwfs_link(struct dentry *olddentry, struct inode *dir, struct dentry *dentry)
{
const char *name = dentry->d_name.name;
size_t namelen = dentry->d_name.len;
register VOLUME *volume = (VOLUME *) dir->i_sb->u.generic_sbp;
register HASH *dirhash = (HASH *) dir->u.generic_ip;
struct inode *oldinode = olddentry->d_inode;
register HASH *hash = (HASH *) oldinode->u.generic_ip;
register HASH *newHash;
register ULONG retCode;
ULONG DirNo, NFSDirNo, NewNFSDirNo;
register struct inode *inode;
register ino_t ino;
DOS dosst;
register DOS *dos = &dosst;
NFS nfsst;
register NFS *nfs = &nfsst;
NFS nfsNewst;
register NFS *nfsNew = &nfsNewst;
#if (VFS_VERBOSE)
NWFSPrint("link %s\n", dentry->d_name.name);
#endif
// don't allow hard links unless the NFS namespace is present
if (volume->NameSpaceDefault != UNIX_NAME_SPACE)
return -EPERM;
if (!dir || !S_ISDIR(dir->i_mode))
{
NWFSPrint("nwfs: inode is NULL or not a directory in hardlink\n");
return -EBADF;
}
// get the target file hash
if (!dirhash)
return -ENOENT;
// get the target file hash
if (!hash)
return -ENOENT;
if (hash->Flags & SUBDIRECTORY_FILE)
return -EPERM;
// if there is a name collision, then report that the file exists
ino = get_directory_number(volume, name, namelen, dir->i_ino);
if (ino)
return -EEXIST;
// get the nfs name space directory number for this file
NFSDirNo = get_namespace_directory_number(volume, hash, UNIX_NAME_SPACE);
if (NFSDirNo == (ULONG) -1)
return -ENOENT;
retCode = ReadDirectoryRecord(volume, (DOS *)nfs, NFSDirNo);
if (retCode)
return -EIO;
// read the root directory record
retCode = ReadDirectoryRecord(volume, dos, hash->DirNo);
if (retCode)
return -EIO;
retCode = NWCreateDirectoryEntry(volume, (BYTE *)name, namelen,
0, dir->i_ino,
NW_HARD_LINKED_FILE,
current->fsuid,
((dir->i_mode & S_ISGID)
? dir->i_gid
: current->fsgid),
nfs->rdev, nfs->mode,
&DirNo,
dos->FirstBlock,
dos->FileSize,
(ULONG) -1, 0,
0, 0);
if (retCode)
return (nwfs_to_linux_error(retCode));
// get the new file hash
newHash = get_directory_record(volume, DirNo);
if (!newHash)
return -ENOENT;
// get the nfs name space directory number for this file
NewNFSDirNo = get_namespace_directory_number(volume, newHash, UNIX_NAME_SPACE);
if (NewNFSDirNo == (ULONG) -1)
return -ENOENT;
// read new NFS record
retCode = ReadDirectoryRecord(volume, (DOS *)nfsNew, NewNFSDirNo);
if (retCode)
return -EIO;
nfs->LinkedFlag = NFS_HASSTREAM_HARD_LINK;
nfs->FirstCreated = 0;
// nfs->nlinks++;
nfsNew->LinkedFlag = NFS_HARD_LINK;
nfsNew->FirstCreated = 1;
nfsNew->mode = 0;
nfsNew->LinkEndDirNo = NFSDirNo;
// write the new NFS record
retCode = WriteDirectoryRecord(volume, (DOS *)nfsNew, NewNFSDirNo);
if (retCode)
return -EIO;
// write the root NFS record
retCode = WriteDirectoryRecord(volume, (DOS *)nfs, NFSDirNo);
if (retCode)
return -EIO;
if (!(inode = iget(dir->i_sb, DirNo)) < 0)
{
NWFSPrint("nwfs: iget failed in link\n");
return -EBADF;
}
// bump directory link count and size
dir->i_mtime = NWFSGetSystemTime();
dir->i_nlink++;
dir->i_size += sizeof(ROOT);
mark_inode_dirty(dir);
d_instantiate(dentry, inode);
return 0;
}
int nwfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
{
const char *name = dentry->d_name.name;
size_t namelen = dentry->d_name.len;
register VOLUME *volume = (VOLUME *) dir->i_sb->u.generic_sbp;
register HASH *hash = (HASH *) dir->u.generic_ip;
register ULONG retCode;
ULONG DirNo;
register struct inode *inode;
register ino_t ino;
#if (VFS_VERBOSE)
NWFSPrint("mknod %s\n", dentry->d_name.name);
#endif
// don't allow device files unless the NFS namespace is present
if (volume->NameSpaceDefault != UNIX_NAME_SPACE)
return -EPERM;
if (!dir || !S_ISDIR(dir->i_mode))
{
NWFSPrint("nwfs: inode is NULL or not a directory in mknod\n");
return -EBADF;
}
if (!hash)
return -ENOENT;
// if there is a name collision, then report that the file exists
ino = get_directory_number(volume, name, namelen, dir->i_ino);
if (ino)
return -EEXIST;
retCode = NWCreateDirectoryEntry(volume, (BYTE *)name, namelen,
0, dir->i_ino,
NW_DEVICE_FILE,
current->fsuid,
((dir->i_mode & S_ISGID)
? dir->i_gid
: current->fsgid),
rdev, mode,
&DirNo,
(ULONG) -1, 0,
(ULONG) -1, 0,
0, 0);
if (retCode)
return (nwfs_to_linux_error(retCode));
if (!(inode = iget(dir->i_sb, DirNo)) < 0)
{
NWFSPrint("nwfs: iget failed in mknod\n");
return -EBADF;
}
#if (VFS_VERBOSE)
NWFSPrint("nwfs: mknod mode-%X rdev-%X inode-mode-%X\n",
(unsigned int)mode, (unsigned int)rdev,
(unsigned int)inode->i_mode);
NWFSPrint("nwfs: IFBLK-%X IFCHR-%X IFLNK-%X\n",
(unsigned int)S_IFBLK,(unsigned int)S_IFCHR,
(unsigned int)S_IFLNK);
#endif
// bump directory link count and size
dir->i_mtime = NWFSGetSystemTime();
dir->i_nlink++;
dir->i_size += sizeof(ROOT);
mark_inode_dirty(dir);
d_instantiate(dentry, inode);
return 0;
}
#endif
#if (LINUX_22)
ULONG nwfs_to_linux_error(ULONG NwfsError)
{
switch (NwfsError)
{
case NwSuccess:
return 0;
case NwFatCorrupt:
case NwFileCorrupt:
case NwDirectoryCorrupt:
case NwVolumeCorrupt:
case NwHashCorrupt:
case NwMissingSegment:
return -ENFILE;
case NwHashError:
case NwNoEntry:
return -ENOENT;
case NwDiskIoError:
case NwMirrorGroupFailure:
case NwNoMoreMirrors:
return -EIO;
case NwInsufficientResources:
return -ENOMEM;
case NwFileExists:
return -EEXIST;
case NwInvalidParameter:
case NwBadName:
return -EINVAL;
case NwVolumeFull:
return -ENOSPC;
case NwNotEmpty:
return -ENOTEMPTY;
case NwAccessError:
return -EACCES;
case NwNotPermitted:
return -EPERM;
case NwMemoryFault:
return -EFAULT;
case NwOtherError:
case NwEndOfFile:
default:
return -EACCES;
}
}
int nwfs_create(struct inode *dir, struct dentry *dentry, int mode)
{
const char *name = dentry->d_name.name;
size_t namelen = dentry->d_name.len;
register VOLUME *volume = (VOLUME *) dir->i_sb->u.generic_sbp;
register HASH *hash = (HASH *) dir->u.generic_ip;
register ULONG retCode;
ULONG DirNo;
register struct inode *inode;
register ino_t ino;
#if (VFS_VERBOSE)
NWFSPrint("create %s\n", dentry->d_name.name);
#endif
if (!dir || !S_ISDIR(dir->i_mode))
{
NWFSPrint("nwfs: inode is NULL or not a directory in create\n");
return -ENOENT;
}
if (!hash)
return -ENOENT;
// if there is a name collision, then report that the file exists
ino = get_directory_number(volume, name, namelen, dir->i_ino);
if (ino)
return -EEXIST;
retCode = NWCreateDirectoryEntry(volume, (BYTE *)name, namelen,
0, dir->i_ino,
NW_NAMED_FILE,
current->fsuid,
((dir->i_mode & S_ISGID)
? dir->i_gid
: current->fsgid),
0, mode,
&DirNo,
(ULONG) -1, 0,
(ULONG) -1, 0,
0, 0);
if (retCode)
return (nwfs_to_linux_error(retCode));
if (!(inode = iget(dir->i_sb, DirNo)) < 0)
{
NWFSPrint("nwfs: iget failed in create\n");
return -EBADF;
}
inode->i_uid = current->fsuid;
inode->i_gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
mark_inode_dirty(inode);
// bump directory link count and size
dir->i_mtime = NWFSGetSystemTime();
dir->i_nlink++;
dir->i_size += sizeof(ROOT);
mark_inode_dirty(dir);
d_instantiate(dentry, inode);
return 0;
}
int nwfs_unlink(struct inode *dir, struct dentry *dentry)
{
const char *name = dentry->d_name.name;
size_t namelen = dentry->d_name.len;
register struct inode *inode = dentry->d_inode;
register VOLUME *volume = (VOLUME *) dir->i_sb->u.generic_sbp;
register HASH *dirhash = (HASH *) dir->u.generic_ip;
register HASH *hash;
register ULONG retCode;
register ino_t ino;
DOS dosst;
register DOS *dos = &dosst;
#if (VFS_VERBOSE)
NWFSPrint("unlink %s\n", name);
#endif
if (!dir || !S_ISDIR(dir->i_mode))
{
NWFSPrint("nwfs: inode is NULL or not a directory\n");
return -EBADF;
}
if (!dirhash)
return -ENOENT;
hash = get_directory_hash(volume, name, namelen, dir->i_ino);
if (!hash)
return -ENOENT;
ino = hash->DirNo;
retCode = ReadDirectoryRecord(volume, dos, ino);
if (retCode)
return -EIO;
#if (SALVAGEABLE_FS)
retCode = NWShadowDirectoryEntry(volume, dos, hash);
if (retCode)
return nwfs_to_linux_error(retCode);
#else
if (hash->Flags & HARD_LINKED_FILE)
{
retCode = NWDeleteDirectoryEntry(volume, dos, hash);
if (retCode)
return nwfs_to_linux_error(retCode);
}
else
{
retCode = NWDeleteDirectoryEntryAndData(volume, dos, hash);
if (retCode)
return nwfs_to_linux_error(retCode);
}
#endif
// adjust directory link count and size
dir->i_ctime = dir->i_mtime = NWFSGetSystemTime();
if (dir->i_nlink)
dir->i_nlink--;
if (dir->i_size)
dir->i_size -= sizeof(ROOT);
mark_inode_dirty(dir);
inode->i_nlink--;
inode->i_ctime = dir->i_ctime;
mark_inode_dirty(inode);
d_delete(dentry);
return 0;
}
int nwfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
const char *name = dentry->d_name.name;
size_t namelen = dentry->d_name.len;
register VOLUME *volume = (VOLUME *) dir->i_sb->u.generic_sbp;
register HASH *hash = (HASH *) dir->u.generic_ip;
register ULONG retCode;
ULONG DirNo;
register struct inode *inode;
register ino_t ino;
#if (VFS_VERBOSE)
NWFSPrint("mkdir %s\n", dentry->d_name.name);
#endif
if (!dir || !S_ISDIR(dir->i_mode))
{
NWFSPrint("nwfs: inode is NULL or not a directory in mkdir\n");
return -ENOTDIR;
}
if (!hash)
return -ENOENT;
// if there is a name collision, then report that the directory exists
ino = get_directory_number(volume, name, namelen, dir->i_ino);
if (ino)
return -EEXIST;
retCode = NWCreateDirectoryEntry(volume, (BYTE *)name, namelen,
SUBDIRECTORY, dir->i_ino,
NW_SUBDIRECTORY_FILE,
current->fsuid,
((dir->i_mode & S_ISGID)
? dir->i_gid
: current->fsgid),
0, mode, &DirNo,
(ULONG) -1, 0,
(ULONG) -1, 0,
0, 0);
if (retCode)
return (nwfs_to_linux_error(retCode));
if (!(inode = iget(dir->i_sb, DirNo)) < 0)
return -EINVAL;
inode->i_uid = current->fsuid;
inode->i_gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
mark_inode_dirty(inode);
// bump directory link count and size
dir->i_mtime = NWFSGetSystemTime();
dir->i_nlink++;
dir->i_size += sizeof(ROOT);
mark_inode_dirty(dir);
d_instantiate(dentry, inode);
return 0;