int ncp_symlink(struct inode *dir, struct dentry *dentry, const char *symname) {
int i,length;
struct inode *inode;
char *link;
#ifdef DEBUG
printk("ncp_symlink(dir=%p,dentry=%p,symname=%s)\n",dir,dentry,symname);
#endif
if (!(NCP_SERVER(dir)->m.flags & NCP_MOUNT_SYMLINKS))
return -EPERM; /* EPERM is returned by VFS if symlink procedure does not exist */
if ((length=strlen(symname))>NCP_MAX_SYMLINK_SIZE)
return -EINVAL;
if ((link=(char *)kmalloc(length+9,GFP_NFS))==NULL)
return -ENOMEM;
if (ncp_create_new(dir,dentry,0,aSHARED|aHIDDEN)) {
kfree(link);
return -EIO;
}
inode=dentry->d_inode;
((__u32 *)link)[0]=NCP_SYMLINK_MAGIC0;
((__u32 *)link)[1]=NCP_SYMLINK_MAGIC1;
memcpy(link+8, symname, length+1); /* including last zero for io2vol */
/* map to/from server charset, do not touch upper/lower case as
symlink can point out of ncp filesystem */
io2vol(NCP_SERVER(inode), link+8, 0);
if(ncp_write_kernel(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle,
0, length+8, link, &i) || i!=length+8) {
kfree(link);
return -EIO;
}
kfree(link);
return 0;
}
int ncp_notify_change(struct dentry *dentry, struct iattr *attr)
{
struct inode *inode = dentry->d_inode;
int result = 0;
__le32 info_mask;
struct nw_modify_dos_info info;
struct ncp_server *server;
result = -EIO;
lock_kernel();
server = NCP_SERVER(inode);
if ((!server) || !ncp_conn_valid(server))
goto out;
/* ageing the dentry to force validation */
ncp_age_dentry(server, dentry);
result = inode_change_ok(inode, attr);
if (result < 0)
goto out;
result = -EPERM;
if (((attr->ia_valid & ATTR_UID) &&
(attr->ia_uid != server->m.uid)))
goto out;
if (((attr->ia_valid & ATTR_GID) &&
(attr->ia_gid != server->m.gid)))
goto out;
if (((attr->ia_valid & ATTR_MODE) &&
(attr->ia_mode &
~(S_IFREG | S_IFDIR | S_IRWXUGO))))
goto out;
info_mask = 0;
memset(&info, 0, sizeof(info));
#if 1
if ((attr->ia_valid & ATTR_MODE) != 0)
{
umode_t newmode = attr->ia_mode;
info_mask |= DM_ATTRIBUTES;
if (S_ISDIR(inode->i_mode)) {
newmode &= server->m.dir_mode;
} else {
#ifdef CONFIG_NCPFS_EXTRAS
if (server->m.flags & NCP_MOUNT_EXTRAS) {
/* any non-default execute bit set */
if (newmode & ~server->m.file_mode & S_IXUGO)
info.attributes |= aSHARED | aSYSTEM;
/* read for group/world and not in default file_mode */
else if (newmode & ~server->m.file_mode & S_IRUGO)
info.attributes |= aSHARED;
} else
#endif
newmode &= server->m.file_mode;
}
if (newmode & S_IWUGO)
info.attributes &= ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
else
info.attributes |= (aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
#ifdef CONFIG_NCPFS_NFS_NS
if (ncp_is_nfs_extras(server, NCP_FINFO(inode)->volNumber)) {
result = ncp_modify_nfs_info(server,
NCP_FINFO(inode)->volNumber,
NCP_FINFO(inode)->dirEntNum,
attr->ia_mode, 0);
if (result != 0)
goto out;
info.attributes &= ~(aSHARED | aSYSTEM);
{
/* mark partial success */
struct iattr tmpattr;
tmpattr.ia_valid = ATTR_MODE;
tmpattr.ia_mode = attr->ia_mode;
result = inode_setattr(inode, &tmpattr);
if (result)
goto out;
}
}
#endif
}
#endif
/* Do SIZE before attributes, otherwise mtime together with size does not work...
*/
if ((attr->ia_valid & ATTR_SIZE) != 0) {
int written;
DPRINTK("ncpfs: trying to change size to %ld\n",
attr->ia_size);
if ((result = ncp_make_open(inode, O_WRONLY)) < 0) {
result = -EACCES;
goto out;
}
ncp_write_kernel(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle,
attr->ia_size, 0, "", &written);
/* According to ndir, the changes only take effect after
closing the file */
ncp_inode_close(inode);
result = ncp_make_closed(inode);
if (result)
goto out;
{
struct iattr tmpattr;
tmpattr.ia_valid = ATTR_SIZE;
tmpattr.ia_size = attr->ia_size;
result = inode_setattr(inode, &tmpattr);
if (result)
goto out;
}
}
if ((attr->ia_valid & ATTR_CTIME) != 0) {
info_mask |= (DM_CREATE_TIME | DM_CREATE_DATE);
ncp_date_unix2dos(attr->ia_ctime.tv_sec,
&info.creationTime, &info.creationDate);
}
if ((attr->ia_valid & ATTR_MTIME) != 0) {
info_mask |= (DM_MODIFY_TIME | DM_MODIFY_DATE);
ncp_date_unix2dos(attr->ia_mtime.tv_sec,
&info.modifyTime, &info.modifyDate);
}
if ((attr->ia_valid & ATTR_ATIME) != 0) {
__le16 dummy;
info_mask |= (DM_LAST_ACCESS_DATE);
ncp_date_unix2dos(attr->ia_atime.tv_sec,
&dummy, &info.lastAccessDate);
}
if (info_mask != 0) {
result = ncp_modify_file_or_subdir_dos_info(NCP_SERVER(inode),
inode, info_mask, &info);
if (result != 0) {
result = -EACCES;
if (info_mask == (DM_CREATE_TIME | DM_CREATE_DATE)) {
/* NetWare seems not to allow this. I
do not know why. So, just tell the
user everything went fine. This is
a terrible hack, but I do not know
how to do this correctly. */
result = 0;
} else
goto out;
}
#ifdef CONFIG_NCPFS_STRONG
if ((!result) && (info_mask & DM_ATTRIBUTES))
NCP_FINFO(inode)->nwattr = info.attributes;
#endif
}
if (!result)
result = inode_setattr(inode, attr);
out:
unlock_kernel();
return result;
}
static ssize_t
ncp_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
size_t already_written = 0;
size_t bufsize;
int errno;
void *bouncebuffer;
off_t pos;
ncp_dbg(1, "enter %pD2\n", file);
errno = generic_write_checks(iocb, from);
if (errno <= 0)
return errno;
errno = ncp_make_open(inode, O_WRONLY);
if (errno) {
ncp_dbg(1, "open failed, error=%d\n", errno);
return errno;
}
bufsize = NCP_SERVER(inode)->buffer_size;
errno = file_update_time(file);
if (errno)
goto outrel;
bouncebuffer = vmalloc(bufsize);
if (!bouncebuffer) {
errno = -EIO; /* -ENOMEM */
goto outrel;
}
pos = iocb->ki_pos;
while (iov_iter_count(from)) {
int written_this_time;
size_t to_write = min_t(size_t,
bufsize - (pos % bufsize),
iov_iter_count(from));
if (copy_from_iter(bouncebuffer, to_write, from) != to_write) {
errno = -EFAULT;
break;
}
if (ncp_write_kernel(NCP_SERVER(inode),
NCP_FINFO(inode)->file_handle,
pos, to_write, bouncebuffer, &written_this_time) != 0) {
errno = -EIO;
break;
}
pos += written_this_time;
already_written += written_this_time;
if (written_this_time != to_write)
break;
}
vfree(bouncebuffer);
iocb->ki_pos = pos;
if (pos > i_size_read(inode)) {
mutex_lock(&inode->i_mutex);
if (pos > i_size_read(inode))
i_size_write(inode, pos);
mutex_unlock(&inode->i_mutex);
}
ncp_dbg(1, "exit %pD2\n", file);
outrel:
ncp_inode_close(inode);
return already_written ? already_written : errno;
}
static ssize_t
ncp_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
struct dentry *dentry = file->f_dentry;
struct inode *inode = dentry->d_inode;
size_t already_written = 0;
off_t pos;
size_t bufsize;
int errno;
void* bouncebuffer;
DPRINTK("ncp_file_write: enter %s/%s\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
errno = -EIO;
if (!ncp_conn_valid(NCP_SERVER(inode)))
goto out;
if (!S_ISREG(inode->i_mode)) {
DPRINTK("ncp_file_write: write to non-file, mode %07o\n",
inode->i_mode);
return -EINVAL;
}
errno = 0;
if (!count)
goto out;
errno = ncp_make_open(inode, O_WRONLY);
if (errno) {
DPRINTK(KERN_ERR "ncp_file_write: open failed, error=%d\n", errno);
return errno;
}
pos = *ppos;
if (file->f_flags & O_APPEND) {
pos = inode->i_size;
}
bufsize = NCP_SERVER(inode)->buffer_size;
already_written = 0;
bouncebuffer = vmalloc(bufsize);
if (!bouncebuffer) {
errno = -EIO; /* -ENOMEM */
goto outrel;
}
while (already_written < count) {
int written_this_time;
size_t to_write = min_t(unsigned int,
bufsize - (pos % bufsize),
count - already_written);
if (copy_from_user(bouncebuffer, buf, to_write)) {
errno = -EFAULT;
break;
}
if (ncp_write_kernel(NCP_SERVER(inode),
NCP_FINFO(inode)->file_handle,
pos, to_write, bouncebuffer, &written_this_time) != 0) {
errno = -EIO;
break;
}
pos += written_this_time;
buf += written_this_time;
already_written += written_this_time;
if (written_this_time != to_write) {
break;
}
}
vfree(bouncebuffer);
inode->i_mtime = inode->i_atime = CURRENT_TIME;
*ppos = pos;
if (pos > inode->i_size) {
inode->i_size = pos;
}
DPRINTK("ncp_file_write: exit %s/%s\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
outrel:
ncp_inode_close(inode);
out:
return already_written ? already_written : errno;
}
static ssize_t
ncp_file_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
{
struct dentry *dentry = file->f_path.dentry;
struct inode *inode = dentry->d_inode;
size_t already_written = 0;
off_t pos;
size_t bufsize;
int errno;
void* bouncebuffer;
DPRINTK("ncp_file_write: enter %s/%s\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
if ((ssize_t) count < 0)
return -EINVAL;
pos = *ppos;
if (file->f_flags & O_APPEND) {
pos = i_size_read(inode);
}
if (pos + count > MAX_NON_LFS && !(file->f_flags&O_LARGEFILE)) {
if (pos >= MAX_NON_LFS) {
return -EFBIG;
}
if (count > MAX_NON_LFS - (u32)pos) {
count = MAX_NON_LFS - (u32)pos;
}
}
if (pos >= inode->i_sb->s_maxbytes) {
if (count || pos > inode->i_sb->s_maxbytes) {
return -EFBIG;
}
}
if (pos + count > inode->i_sb->s_maxbytes) {
count = inode->i_sb->s_maxbytes - pos;
}
if (!count)
return 0;
errno = ncp_make_open(inode, O_WRONLY);
if (errno) {
DPRINTK(KERN_ERR "ncp_file_write: open failed, error=%d\n", errno);
return errno;
}
bufsize = NCP_SERVER(inode)->buffer_size;
already_written = 0;
bouncebuffer = vmalloc(bufsize);
if (!bouncebuffer) {
errno = -EIO; /* -ENOMEM */
goto outrel;
}
while (already_written < count) {
int written_this_time;
size_t to_write = min_t(unsigned int,
bufsize - (pos % bufsize),
count - already_written);
if (copy_from_user(bouncebuffer, buf, to_write)) {
errno = -EFAULT;
break;
}
if (ncp_write_kernel(NCP_SERVER(inode),
NCP_FINFO(inode)->file_handle,
pos, to_write, bouncebuffer, &written_this_time) != 0) {
errno = -EIO;
break;
}
pos += written_this_time;
buf += written_this_time;
already_written += written_this_time;
if (written_this_time != to_write) {
break;
}
}
vfree(bouncebuffer);
file_update_time(file);
*ppos = pos;
if (pos > i_size_read(inode)) {
mutex_lock(&inode->i_mutex);
if (pos > i_size_read(inode))
i_size_write(inode, pos);
mutex_unlock(&inode->i_mutex);
}
DPRINTK("ncp_file_write: exit %s/%s\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
outrel:
ncp_inode_close(inode);
return already_written ? already_written : errno;
}
int ncp_symlink(struct inode *dir, struct dentry *dentry, const char *symname) {
struct inode *inode;
char *rawlink;
int length, err, i, outlen;
int kludge;
int mode;
__le32 attr;
unsigned int hdr;
DPRINTK("ncp_symlink(dir=%p,dentry=%p,symname=%s)\n",dir,dentry,symname);
if (ncp_is_nfs_extras(NCP_SERVER(dir), NCP_FINFO(dir)->volNumber))
kludge = 0;
else
#ifdef CONFIG_NCPFS_EXTRAS
if (NCP_SERVER(dir)->m.flags & NCP_MOUNT_SYMLINKS)
kludge = 1;
else
#endif
/* EPERM is returned by VFS if symlink procedure does not exist */
return -EPERM;
rawlink = kmalloc(NCP_MAX_SYMLINK_SIZE, GFP_KERNEL);
if (!rawlink)
return -ENOMEM;
if (kludge) {
mode = 0;
attr = aSHARED | aHIDDEN;
((__le32 *)rawlink)[0]=NCP_SYMLINK_MAGIC0;
((__le32 *)rawlink)[1]=NCP_SYMLINK_MAGIC1;
hdr = 8;
} else {
mode = S_IFLNK | S_IRWXUGO;
attr = 0;
hdr = 0;
}
length = strlen(symname);
/* map to/from server charset, do not touch upper/lower case as
symlink can point out of ncp filesystem */
outlen = NCP_MAX_SYMLINK_SIZE - hdr;
err = ncp_io2vol(NCP_SERVER(dir), rawlink + hdr, &outlen, symname, length, 0);
if (err)
goto failfree;
outlen += hdr;
err = -EIO;
if (ncp_create_new(dir,dentry,mode,0,attr)) {
goto failfree;
}
inode=dentry->d_inode;
if (ncp_make_open(inode, O_WRONLY))
goto failfree;
if (ncp_write_kernel(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle,
0, outlen, rawlink, &i) || i!=outlen) {
goto fail;
}
ncp_inode_close(inode);
ncp_make_closed(inode);
kfree(rawlink);
return 0;
fail:;
ncp_inode_close(inode);
ncp_make_closed(inode);
failfree:;
kfree(rawlink);
return err;
}
