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linux_dsm_epyc7002/fs/smbfs/proc.c
Eric W. Biederman a71113da44 [PATCH] smbfs: Make conn_pid a struct pid 
smbfs keeps track of the user space server process in conn_pid.  This converts
that track to use a struct pid instead of pid_t.  This keeps us safe from pid
wrap around issues and prepares the way for the pid namespace.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-13 09:05:53 -08:00

3509 lines
84 KiB
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/*
* proc.c
*
* Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
* Copyright (C) 1997 by Volker Lendecke
*
* Please add a note about your changes to smbfs in the ChangeLog file.
*/
#include <linux/types.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
#include <linux/dcache.h>
#include <linux/dirent.h>
#include <linux/nls.h>
#include <linux/smp_lock.h>
#include <linux/net.h>
#include <linux/vfs.h>
#include <linux/smb_fs.h>
#include <linux/smbno.h>
#include <linux/smb_mount.h>
#include <net/sock.h>
#include <asm/string.h>
#include <asm/div64.h>
#include "smb_debug.h"
#include "proto.h"
#include "request.h"
/* Features. Undefine if they cause problems, this should perhaps be a
config option. */
#define SMBFS_POSIX_UNLINK 1
/* Allow smb_retry to be interrupted. */
#define SMB_RETRY_INTR
#define SMB_VWV(packet) ((packet) + SMB_HEADER_LEN)
#define SMB_CMD(packet) (*(packet+8))
#define SMB_WCT(packet) (*(packet+SMB_HEADER_LEN - 1))
#define SMB_DIRINFO_SIZE 43
#define SMB_STATUS_SIZE 21
#define SMB_ST_BLKSIZE (PAGE_SIZE)
#define SMB_ST_BLKSHIFT (PAGE_SHIFT)
static struct smb_ops smb_ops_core;
static struct smb_ops smb_ops_os2;
static struct smb_ops smb_ops_win95;
static struct smb_ops smb_ops_winNT;
static struct smb_ops smb_ops_unix;
static struct smb_ops smb_ops_null;
static void
smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr);
static void
smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr);
static int
smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir,
struct smb_fattr *fattr);
static int
smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry,
struct smb_fattr *fattr);
static int
smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry,
u16 attr);
static int
smb_proc_setattr_ext(struct smb_sb_info *server,
struct inode *inode, struct smb_fattr *fattr);
static int
smb_proc_query_cifsunix(struct smb_sb_info *server);
static void
install_ops(struct smb_ops *dst, struct smb_ops *src);
static void
str_upper(char *name, int len)
{
while (len--)
{
if (*name >= 'a' && *name <= 'z')
*name -= ('a' - 'A');
name++;
}
}
#if 0
static void
str_lower(char *name, int len)
{
while (len--)
{
if (*name >= 'A' && *name <= 'Z')
*name += ('a' - 'A');
name++;
}
}
#endif
/* reverse a string inline. This is used by the dircache walking routines */
static void reverse_string(char *buf, int len)
{
char c;
char *end = buf+len-1;
while(buf < end) {
c = *buf;
*(buf++) = *end;
*(end--) = c;
}
}
/* no conversion, just a wrapper for memcpy. */
static int convert_memcpy(unsigned char *output, int olen,
const unsigned char *input, int ilen,
struct nls_table *nls_from,
struct nls_table *nls_to)
{
if (olen < ilen)
return -ENAMETOOLONG;
memcpy(output, input, ilen);
return ilen;
}
static inline int write_char(unsigned char ch, char *output, int olen)
{
if (olen < 4)
return -ENAMETOOLONG;
sprintf(output, ":x%02x", ch);
return 4;
}
static inline int write_unichar(wchar_t ch, char *output, int olen)
{
if (olen < 5)
return -ENAMETOOLONG;
sprintf(output, ":%04x", ch);
return 5;
}
/* convert from one "codepage" to another (possibly being utf8). */
static int convert_cp(unsigned char *output, int olen,
const unsigned char *input, int ilen,
struct nls_table *nls_from,
struct nls_table *nls_to)
{
int len = 0;
int n;
wchar_t ch;
while (ilen > 0) {
/* convert by changing to unicode and back to the new cp */
n = nls_from->char2uni(input, ilen, &ch);
if (n == -EINVAL) {
ilen--;
n = write_char(*input++, output, olen);
if (n < 0)
goto fail;
output += n;
olen -= n;
len += n;
continue;
} else if (n < 0)
goto fail;
input += n;
ilen -= n;
n = nls_to->uni2char(ch, output, olen);
if (n == -EINVAL)
n = write_unichar(ch, output, olen);
if (n < 0)
goto fail;
output += n;
olen -= n;
len += n;
}
return len;
fail:
return n;
}
/* ----------------------------------------------------------- */
/*
* nls_unicode
*
* This encodes/decodes little endian unicode format
*/
static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
{
if (boundlen < 2)
return -EINVAL;
*out++ = uni & 0xff;
*out++ = uni >> 8;
return 2;
}
static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
{
if (boundlen < 2)
return -EINVAL;
*uni = (rawstring[1] << 8) | rawstring[0];
return 2;
}
static struct nls_table unicode_table = {
.charset = "unicode",
.uni2char = uni2char,
.char2uni = char2uni,
};
/* ----------------------------------------------------------- */
static int setcodepage(struct nls_table **p, char *name)
{
struct nls_table *nls;
if (!name || !*name) {
nls = NULL;
} else if ( (nls = load_nls(name)) == NULL) {
printk (KERN_ERR "smbfs: failed to load nls '%s'\n", name);
return -EINVAL;
}
/* if already set, unload the previous one. */
if (*p && *p != &unicode_table)
unload_nls(*p);
*p = nls;
return 0;
}
/* Handles all changes to codepage settings. */
int smb_setcodepage(struct smb_sb_info *server, struct smb_nls_codepage *cp)
{
int n = 0;
smb_lock_server(server);
/* Don't load any nls_* at all, if no remote is requested */
if (!*cp->remote_name)
goto out;
/* local */
n = setcodepage(&server->local_nls, cp->local_name);
if (n != 0)
goto out;
/* remote */
if (!strcmp(cp->remote_name, "unicode")) {
server->remote_nls = &unicode_table;
} else {
n = setcodepage(&server->remote_nls, cp->remote_name);
if (n != 0)
setcodepage(&server->local_nls, NULL);
}
out:
if (server->local_nls != NULL && server->remote_nls != NULL)
server->ops->convert = convert_cp;
else
server->ops->convert = convert_memcpy;
smb_unlock_server(server);
return n;
}
/*****************************************************************************/
/* */
/* Encoding/Decoding section */
/* */
/*****************************************************************************/
static __u8 *
smb_encode_smb_length(__u8 * p, __u32 len)
{
*p = 0;
*(p+1) = 0;
*(p+2) = (len & 0xFF00) >> 8;
*(p+3) = (len & 0xFF);
if (len > 0xFFFF)
{
*(p+1) = 1;
}
return p + 4;
}
/*
* smb_build_path: build the path to entry and name storing it in buf.
* The path returned will have the trailing '\0'.
*/
static int smb_build_path(struct smb_sb_info *server, unsigned char *buf,
int maxlen,
struct dentry *entry, struct qstr *name)
{
unsigned char *path = buf;
int len;
int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE) != 0;
if (maxlen < (2<<unicode))
return -ENAMETOOLONG;
if (maxlen > SMB_MAXPATHLEN + 1)
maxlen = SMB_MAXPATHLEN + 1;
if (entry == NULL)
goto test_name_and_out;
/*
* If IS_ROOT, we have to do no walking at all.
*/
if (IS_ROOT(entry) && !name) {
*path++ = '\\';
if (unicode) *path++ = '\0';
*path++ = '\0';
if (unicode) *path++ = '\0';
return path-buf;
}
/*
* Build the path string walking the tree backward from end to ROOT
* and store it in reversed order [see reverse_string()]
*/
dget(entry);
spin_lock(&entry->d_lock);
while (!IS_ROOT(entry)) {
struct dentry *parent;
if (maxlen < (3<<unicode)) {
spin_unlock(&entry->d_lock);
dput(entry);
return -ENAMETOOLONG;
}
len = server->ops->convert(path, maxlen-2,
entry->d_name.name, entry->d_name.len,
server->local_nls, server->remote_nls);
if (len < 0) {
spin_unlock(&entry->d_lock);
dput(entry);
return len;
}
reverse_string(path, len);
path += len;
if (unicode) {
/* Note: reverse order */
*path++ = '\0';
maxlen--;
}
*path++ = '\\';
maxlen -= len+1;
parent = entry->d_parent;
dget(parent);
spin_unlock(&entry->d_lock);
dput(entry);
entry = parent;
spin_lock(&entry->d_lock);
}
spin_unlock(&entry->d_lock);
dput(entry);
reverse_string(buf, path-buf);
/* maxlen has space for at least one char */
test_name_and_out:
if (name) {
if (maxlen < (3<<unicode))
return -ENAMETOOLONG;
*path++ = '\\';
if (unicode) {
*path++ = '\0';
maxlen--;
}
len = server->ops->convert(path, maxlen-2,
name->name, name->len,
server->local_nls, server->remote_nls);
if (len < 0)
return len;
path += len;
maxlen -= len+1;
}
/* maxlen has space for at least one char */
*path++ = '\0';
if (unicode) *path++ = '\0';
return path-buf;
}
static int smb_encode_path(struct smb_sb_info *server, char *buf, int maxlen,
struct dentry *dir, struct qstr *name)
{
int result;
result = smb_build_path(server, buf, maxlen, dir, name);
if (result < 0)
goto out;
if (server->opt.protocol <= SMB_PROTOCOL_COREPLUS)
str_upper(buf, result);
out:
return result;
}
/* encode_path for non-trans2 request SMBs */
static int smb_simple_encode_path(struct smb_request *req, char **p,
struct dentry * entry, struct qstr * name)
{
struct smb_sb_info *server = req->rq_server;
char *s = *p;
int res;
int maxlen = ((char *)req->rq_buffer + req->rq_bufsize) - s;
int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE);
if (!maxlen)
return -ENAMETOOLONG;
*s++ = 4; /* ASCII data format */
/*
* SMB Unicode strings must be 16bit aligned relative the start of the
* packet. If they are not they must be padded with 0.
*/
if (unicode) {
int align = s - (char *)req->rq_buffer;
if (!(align & 1)) {
*s++ = '\0';
maxlen--;
}
}
res = smb_encode_path(server, s, maxlen-1, entry, name);
if (res < 0)
return res;
*p = s + res;
return 0;
}
/* The following are taken directly from msdos-fs */
/* Linear day numbers of the respective 1sts in non-leap years. */
static int day_n[] =
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0};
/* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */
static time_t
utc2local(struct smb_sb_info *server, time_t time)
{
return time - server->opt.serverzone*60;
}
static time_t
local2utc(struct smb_sb_info *server, time_t time)
{
return time + server->opt.serverzone*60;
}
/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
static time_t
date_dos2unix(struct smb_sb_info *server, __u16 date, __u16 time)
{
int month, year;
time_t secs;
/* first subtract and mask after that... Otherwise, if
date == 0, bad things happen */
month = ((date >> 5) - 1) & 15;
year = date >> 9;
secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + 86400 *
((date & 31) - 1 + day_n[month] + (year / 4) + year * 365 - ((year & 3) == 0 &&
month < 2 ? 1 : 0) + 3653);
/* days since 1.1.70 plus 80's leap day */
return local2utc(server, secs);
}
/* Convert linear UNIX date to a MS-DOS time/date pair. */
static void
date_unix2dos(struct smb_sb_info *server,
int unix_date, __u16 *date, __u16 *time)
{
int day, year, nl_day, month;
unix_date = utc2local(server, unix_date);
if (unix_date < 315532800)
unix_date = 315532800;
*time = (unix_date % 60) / 2 +
(((unix_date / 60) % 60) << 5) +
(((unix_date / 3600) % 24) << 11);
day = unix_date / 86400 - 3652;
year = day / 365;
if ((year + 3) / 4 + 365 * year > day)
year--;
day -= (year + 3) / 4 + 365 * year;
if (day == 59 && !(year & 3)) {
nl_day = day;
month = 2;
} else {
nl_day = (year & 3) || day <= 59 ? day : day - 1;
for (month = 0; month < 12; month++)
if (day_n[month] > nl_day)
break;
}
*date = nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9);
}
/* The following are taken from fs/ntfs/util.c */
#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)
/*
* Convert the NT UTC (based 1601-01-01, in hundred nanosecond units)
* into Unix UTC (based 1970-01-01, in seconds).
*/
static struct timespec
smb_ntutc2unixutc(u64 ntutc)
{
struct timespec ts;
/* FIXME: what about the timezone difference? */
/* Subtract the NTFS time offset, then convert to 1s intervals. */
u64 t = ntutc - NTFS_TIME_OFFSET;
ts.tv_nsec = do_div(t, 10000000) * 100;
ts.tv_sec = t;
return ts;
}
/* Convert the Unix UTC into NT time */
static u64
smb_unixutc2ntutc(struct timespec ts)
{
/* Note: timezone conversion is probably wrong. */
/* return ((u64)utc2local(server, t)) * 10000000 + NTFS_TIME_OFFSET; */
return ((u64)ts.tv_sec) * 10000000 + ts.tv_nsec/100 + NTFS_TIME_OFFSET;
}
#define MAX_FILE_MODE 6
static mode_t file_mode[] = {
S_IFREG, S_IFDIR, S_IFLNK, S_IFCHR, S_IFBLK, S_IFIFO, S_IFSOCK
};
static int smb_filetype_to_mode(u32 filetype)
{
if (filetype > MAX_FILE_MODE) {
PARANOIA("Filetype out of range: %d\n", filetype);
return S_IFREG;
}
return file_mode[filetype];
}
static u32 smb_filetype_from_mode(int mode)
{
if (S_ISREG(mode))
return UNIX_TYPE_FILE;
if (S_ISDIR(mode))
return UNIX_TYPE_DIR;
if (S_ISLNK(mode))
return UNIX_TYPE_SYMLINK;
if (S_ISCHR(mode))
return UNIX_TYPE_CHARDEV;
if (S_ISBLK(mode))
return UNIX_TYPE_BLKDEV;
if (S_ISFIFO(mode))
return UNIX_TYPE_FIFO;
if (S_ISSOCK(mode))
return UNIX_TYPE_SOCKET;
return UNIX_TYPE_UNKNOWN;
}
/*****************************************************************************/
/* */
/* Support section. */
/* */
/*****************************************************************************/
__u32
smb_len(__u8 * p)
{
return ((*(p+1) & 0x1) << 16L) | (*(p+2) << 8L) | *(p+3);
}
static __u16
smb_bcc(__u8 * packet)
{
int pos = SMB_HEADER_LEN + SMB_WCT(packet) * sizeof(__u16);
return WVAL(packet, pos);
}
/* smb_valid_packet: We check if packet fulfills the basic
requirements of a smb packet */
static int
smb_valid_packet(__u8 * packet)
{
return (packet[4] == 0xff
&& packet[5] == 'S'
&& packet[6] == 'M'
&& packet[7] == 'B'
&& (smb_len(packet) + 4 == SMB_HEADER_LEN
+ SMB_WCT(packet) * 2 + smb_bcc(packet)));
}
/* smb_verify: We check if we got the answer we expected, and if we
got enough data. If bcc == -1, we don't care. */
static int
smb_verify(__u8 * packet, int command, int wct, int bcc)
{
if (SMB_CMD(packet) != command)
goto bad_command;
if (SMB_WCT(packet) < wct)
goto bad_wct;
if (bcc != -1 && smb_bcc(packet) < bcc)
goto bad_bcc;
return 0;
bad_command:
printk(KERN_ERR "smb_verify: command=%x, SMB_CMD=%x??\n",
command, SMB_CMD(packet));
goto fail;
bad_wct:
printk(KERN_ERR "smb_verify: command=%x, wct=%d, SMB_WCT=%d??\n",
command, wct, SMB_WCT(packet));
goto fail;
bad_bcc:
printk(KERN_ERR "smb_verify: command=%x, bcc=%d, SMB_BCC=%d??\n",
command, bcc, smb_bcc(packet));
fail:
return -EIO;
}
/*
* Returns the maximum read or write size for the "payload". Making all of the
* packet fit within the negotiated max_xmit size.
*
* N.B. Since this value is usually computed before locking the server,
* the server's packet size must never be decreased!
*/
static inline int
smb_get_xmitsize(struct smb_sb_info *server, int overhead)
{
return server->opt.max_xmit - overhead;
}
/*
* Calculate the maximum read size
*/
int
smb_get_rsize(struct smb_sb_info *server)
{
/* readX has 12 parameters, read has 5 */
int overhead = SMB_HEADER_LEN + 12 * sizeof(__u16) + 2 + 1 + 2;
int size = smb_get_xmitsize(server, overhead);
VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size);
return size;
}
/*
* Calculate the maximum write size
*/
int
smb_get_wsize(struct smb_sb_info *server)
{
/* writeX has 14 parameters, write has 5 */
int overhead = SMB_HEADER_LEN + 14 * sizeof(__u16) + 2 + 1 + 2;
int size = smb_get_xmitsize(server, overhead);
VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size);
return size;
}
/*
* Convert SMB error codes to -E... errno values.
*/
int
smb_errno(struct smb_request *req)
{
int errcls = req->rq_rcls;
int error = req->rq_err;
char *class = "Unknown";
VERBOSE("errcls %d code %d from command 0x%x\n",
errcls, error, SMB_CMD(req->rq_header));
if (errcls == ERRDOS) {
switch (error) {
case ERRbadfunc:
return -EINVAL;
case ERRbadfile:
case ERRbadpath:
return -ENOENT;
case ERRnofids:
return -EMFILE;
case ERRnoaccess:
return -EACCES;
case ERRbadfid:
return -EBADF;
case ERRbadmcb:
return -EREMOTEIO;
case ERRnomem:
return -ENOMEM;
case ERRbadmem:
return -EFAULT;
case ERRbadenv:
case ERRbadformat:
return -EREMOTEIO;
case ERRbadaccess:
return -EACCES;
case ERRbaddata:
return -E2BIG;
case ERRbaddrive:
return -ENXIO;
case ERRremcd:
return -EREMOTEIO;
case ERRdiffdevice:
return -EXDEV;
case ERRnofiles:
return -ENOENT;
case ERRbadshare:
return -ETXTBSY;
case ERRlock:
return -EDEADLK;
case ERRfilexists:
return -EEXIST;
case ERROR_INVALID_PARAMETER:
return -EINVAL;
case ERROR_DISK_FULL:
return -ENOSPC;
case ERROR_INVALID_NAME:
return -ENOENT;
case ERROR_DIR_NOT_EMPTY:
return -ENOTEMPTY;
case ERROR_NOT_LOCKED:
return -ENOLCK;
case ERROR_ALREADY_EXISTS:
return -EEXIST;
default:
class = "ERRDOS";
goto err_unknown;
}
} else if (errcls == ERRSRV) {
switch (error) {
/* N.B. This is wrong ... EIO ? */
case ERRerror:
return -ENFILE;
case ERRbadpw:
return -EINVAL;
case ERRbadtype:
case ERRtimeout:
return -EIO;
case ERRaccess:
return -EACCES;
/*
* This is a fatal error, as it means the "tree ID"
* for this connection is no longer valid. We map
* to a special error code and get a new connection.
*/
case ERRinvnid:
return -EBADSLT;
default:
class = "ERRSRV";
goto err_unknown;
}
} else if (errcls == ERRHRD) {
switch (error) {
case ERRnowrite:
return -EROFS;
case ERRbadunit:
return -ENODEV;
case ERRnotready:
return -EUCLEAN;
case ERRbadcmd:
case ERRdata:
return -EIO;
case ERRbadreq:
return -ERANGE;
case ERRbadshare:
return -ETXTBSY;
case ERRlock:
return -EDEADLK;
case ERRdiskfull:
return -ENOSPC;
default:
class = "ERRHRD";
goto err_unknown;
}
} else if (errcls == ERRCMD) {
class = "ERRCMD";
} else if (errcls == SUCCESS) {
return 0; /* This is the only valid 0 return */
}
err_unknown:
printk(KERN_ERR "smb_errno: class %s, code %d from command 0x%x\n",
class, error, SMB_CMD(req->rq_header));
return -EIO;
}
/* smb_request_ok: We expect the server to be locked. Then we do the
request and check the answer completely. When smb_request_ok
returns 0, you can be quite sure that everything went well. When
the answer is <=0, the returned number is a valid unix errno. */
static int
smb_request_ok(struct smb_request *req, int command, int wct, int bcc)
{
int result;
req->rq_resp_wct = wct;
req->rq_resp_bcc = bcc;
result = smb_add_request(req);
if (result != 0) {
DEBUG1("smb_request failed\n");
goto out;
}
if (smb_valid_packet(req->rq_header) != 0) {
PARANOIA("invalid packet!\n");
goto out;
}
result = smb_verify(req->rq_header, command, wct, bcc);
out:
return result;
}
/*
* This implements the NEWCONN ioctl. It installs the server pid,
* sets server->state to CONN_VALID, and wakes up the waiting process.
*/
int
smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt)
{
struct file *filp;
struct sock *sk;
int error;
VERBOSE("fd=%d, pid=%d\n", opt->fd, current->pid);
smb_lock_server(server);
/*
* Make sure we don't already have a valid connection ...
*/
error = -EINVAL;
if (server->state == CONN_VALID)
goto out;
error = -EACCES;
if (current->uid != server->mnt->mounted_uid &&
!capable(CAP_SYS_ADMIN))
goto out;
error = -EBADF;
filp = fget(opt->fd);
if (!filp)
goto out;
if (!smb_valid_socket(filp->f_path.dentry->d_inode))
goto out_putf;
server->sock_file = filp;
server->conn_pid = get_pid(task_pid(current));
server->opt = *opt;
server->generation += 1;
server->state = CONN_VALID;
error = 0;
if (server->conn_error) {
/*
* conn_error is the returncode we originally decided to
* drop the old connection on. This message should be positive
* and not make people ask questions on why smbfs is printing
* error messages ...
*/
printk(KERN_INFO "SMB connection re-established (%d)\n",
server->conn_error);
server->conn_error = 0;
}
/*
* Store the server in sock user_data (Only used by sunrpc)
*/
sk = SOCKET_I(filp->f_path.dentry->d_inode)->sk;
sk->sk_user_data = server;
/* chain into the data_ready callback */
server->data_ready = xchg(&sk->sk_data_ready, smb_data_ready);
/* check if we have an old smbmount that uses seconds for the
serverzone */
if (server->opt.serverzone > 12*60 || server->opt.serverzone < -12*60)
server->opt.serverzone /= 60;
/* now that we have an established connection we can detect the server
type and enable bug workarounds */
if (server->opt.protocol < SMB_PROTOCOL_LANMAN2)
install_ops(server->ops, &smb_ops_core);
else if (server->opt.protocol == SMB_PROTOCOL_LANMAN2)
install_ops(server->ops, &smb_ops_os2);
else if (server->opt.protocol == SMB_PROTOCOL_NT1 &&
(server->opt.max_xmit < 0x1000) &&
!(server->opt.capabilities & SMB_CAP_NT_SMBS)) {
/* FIXME: can we kill the WIN95 flag now? */
server->mnt->flags |= SMB_MOUNT_WIN95;
VERBOSE("detected WIN95 server\n");
install_ops(server->ops, &smb_ops_win95);
} else {
/*
* Samba has max_xmit 65535
* NT4spX has max_xmit 4536 (or something like that)
* win2k has ...
*/
VERBOSE("detected NT1 (Samba, NT4/5) server\n");
install_ops(server->ops, &smb_ops_winNT);
}
/* FIXME: the win9x code wants to modify these ... (seek/trunc bug) */
if (server->mnt->flags & SMB_MOUNT_OLDATTR) {
server->ops->getattr = smb_proc_getattr_core;
} else if (server->mnt->flags & SMB_MOUNT_DIRATTR) {
server->ops->getattr = smb_proc_getattr_ff;
}
/* Decode server capabilities */
if (server->opt.capabilities & SMB_CAP_LARGE_FILES) {
/* Should be ok to set this now, as no one can access the
mount until the connection has been established. */
SB_of(server)->s_maxbytes = ~0ULL >> 1;
VERBOSE("LFS enabled\n");
}
if (server->opt.capabilities & SMB_CAP_UNICODE) {
server->mnt->flags |= SMB_MOUNT_UNICODE;
VERBOSE("Unicode enabled\n");
} else {
server->mnt->flags &= ~SMB_MOUNT_UNICODE;
}
#if 0
/* flags we may test for other patches ... */
if (server->opt.capabilities & SMB_CAP_LARGE_READX) {
VERBOSE("Large reads enabled\n");
}
if (server->opt.capabilities & SMB_CAP_LARGE_WRITEX) {
VERBOSE("Large writes enabled\n");
}
#endif
if (server->opt.capabilities & SMB_CAP_UNIX) {
struct inode *inode;
VERBOSE("Using UNIX CIFS extensions\n");
install_ops(server->ops, &smb_ops_unix);
inode = SB_of(server)->s_root->d_inode;
if (inode)
inode->i_op = &smb_dir_inode_operations_unix;
}
VERBOSE("protocol=%d, max_xmit=%d, pid=%d capabilities=0x%x\n",
server->opt.protocol, server->opt.max_xmit,
pid_nr(server->conn_pid), server->opt.capabilities);
/* FIXME: this really should be done by smbmount. */
if (server->opt.max_xmit > SMB_MAX_PACKET_SIZE) {
server->opt.max_xmit = SMB_MAX_PACKET_SIZE;
}
smb_unlock_server(server);
smbiod_wake_up();
if (server->opt.capabilities & SMB_CAP_UNIX)
smb_proc_query_cifsunix(server);
server->conn_complete++;
wake_up_interruptible_all(&server->conn_wq);
return error;
out:
smb_unlock_server(server);
smbiod_wake_up();
return error;
out_putf:
fput(filp);
goto out;
}
/* smb_setup_header: We completely set up the packet. You only have to
insert the command-specific fields */
__u8 *
smb_setup_header(struct smb_request *req, __u8 command, __u16 wct, __u16 bcc)
{
__u32 xmit_len = SMB_HEADER_LEN + wct * sizeof(__u16) + bcc + 2;
__u8 *p = req->rq_header;
struct smb_sb_info *server = req->rq_server;
p = smb_encode_smb_length(p, xmit_len - 4);
*p++ = 0xff;
*p++ = 'S';
*p++ = 'M';
*p++ = 'B';
*p++ = command;
memset(p, '\0', 19);
p += 19;
p += 8;
if (server->opt.protocol > SMB_PROTOCOL_CORE) {
int flags = SMB_FLAGS_CASELESS_PATHNAMES;
int flags2 = SMB_FLAGS2_LONG_PATH_COMPONENTS |
SMB_FLAGS2_EXTENDED_ATTRIBUTES; /* EA? not really ... */
*(req->rq_header + smb_flg) = flags;
if (server->mnt->flags & SMB_MOUNT_UNICODE)
flags2 |= SMB_FLAGS2_UNICODE_STRINGS;
WSET(req->rq_header, smb_flg2, flags2);
}
*p++ = wct; /* wct */
p += 2 * wct;
WSET(p, 0, bcc);
/* Include the header in the data to send */
req->rq_iovlen = 1;
req->rq_iov[0].iov_base = req->rq_header;
req->rq_iov[0].iov_len = xmit_len - bcc;
return req->rq_buffer;
}
static void
smb_setup_bcc(struct smb_request *req, __u8 *p)
{
u16 bcc = p - req->rq_buffer;
u8 *pbcc = req->rq_header + SMB_HEADER_LEN + 2*SMB_WCT(req->rq_header);
WSET(pbcc, 0, bcc);
smb_encode_smb_length(req->rq_header, SMB_HEADER_LEN +
2*SMB_WCT(req->rq_header) - 2 + bcc);
/* Include the "bytes" in the data to send */
req->rq_iovlen = 2;
req->rq_iov[1].iov_base = req->rq_buffer;
req->rq_iov[1].iov_len = bcc;
}
static int
smb_proc_seek(struct smb_sb_info *server, __u16 fileid,
__u16 mode, off_t offset)
{
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, 0)))
goto out;
smb_setup_header(req, SMBlseek, 4, 0);
WSET(req->rq_header, smb_vwv0, fileid);
WSET(req->rq_header, smb_vwv1, mode);
DSET(req->rq_header, smb_vwv2, offset);
req->rq_flags |= SMB_REQ_NORETRY;
result = smb_request_ok(req, SMBlseek, 2, 0);
if (result < 0) {
result = 0;
goto out_free;
}
result = DVAL(req->rq_header, smb_vwv0);
out_free:
smb_rput(req);
out:
return result;
}
static int
smb_proc_open(struct smb_sb_info *server, struct dentry *dentry, int wish)
{
struct inode *ino = dentry->d_inode;
struct smb_inode_info *ei = SMB_I(ino);
int mode, read_write = 0x42, read_only = 0x40;
int res;
char *p;
struct smb_request *req;
/*
* Attempt to open r/w, unless there are no write privileges.
*/
mode = read_write;
if (!(ino->i_mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
mode = read_only;
#if 0
/* FIXME: why is this code not in? below we fix it so that a caller
wanting RO doesn't get RW. smb_revalidate_inode does some
optimization based on access mode. tail -f needs it to be correct.
We must open rw since we don't do the open if called a second time
with different 'wish'. Is that not supported by smb servers? */
if (!(wish & (O_WRONLY | O_RDWR)))
mode = read_only;
#endif
res = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
retry:
p = smb_setup_header(req, SMBopen, 2, 0);
WSET(req->rq_header, smb_vwv0, mode);
WSET(req->rq_header, smb_vwv1, aSYSTEM | aHIDDEN | aDIR);
res = smb_simple_encode_path(req, &p, dentry, NULL);
if (res < 0)
goto out_free;
smb_setup_bcc(req, p);
res = smb_request_ok(req, SMBopen, 7, 0);
if (res != 0) {
if (mode == read_write &&
(res == -EACCES || res == -ETXTBSY || res == -EROFS))
{
VERBOSE("%s/%s R/W failed, error=%d, retrying R/O\n",
DENTRY_PATH(dentry), res);
mode = read_only;
req->rq_flags = 0;
goto retry;
}
goto out_free;
}
/* We should now have data in vwv[0..6]. */
ei->fileid = WVAL(req->rq_header, smb_vwv0);
ei->attr = WVAL(req->rq_header, smb_vwv1);
/* smb_vwv2 has mtime */
/* smb_vwv4 has size */
ei->access = (WVAL(req->rq_header, smb_vwv6) & SMB_ACCMASK);
ei->open = server->generation;
out_free:
smb_rput(req);
out:
return res;
}
/*
* Make sure the file is open, and check that the access
* is compatible with the desired access.
*/
int
smb_open(struct dentry *dentry, int wish)
{
struct inode *inode = dentry->d_inode;
int result;
__u16 access;
result = -ENOENT;
if (!inode) {
printk(KERN_ERR "smb_open: no inode for dentry %s/%s\n",
DENTRY_PATH(dentry));
goto out;
}
if (!smb_is_open(inode)) {
struct smb_sb_info *server = server_from_inode(inode);
result = 0;
if (!smb_is_open(inode))
result = smb_proc_open(server, dentry, wish);
if (result)
goto out;
/*
* A successful open means the path is still valid ...
*/
smb_renew_times(dentry);
}
/*
* Check whether the access is compatible with the desired mode.
*/
result = 0;
access = SMB_I(inode)->access;
if (access != wish && access != SMB_O_RDWR) {
PARANOIA("%s/%s access denied, access=%x, wish=%x\n",
DENTRY_PATH(dentry), access, wish);
result = -EACCES;
}
out:
return result;
}
static int
smb_proc_close(struct smb_sb_info *server, __u16 fileid, __u32 mtime)
{
struct smb_request *req;
int result = -ENOMEM;
if (! (req = smb_alloc_request(server, 0)))
goto out;
smb_setup_header(req, SMBclose, 3, 0);
WSET(req->rq_header, smb_vwv0, fileid);
DSET(req->rq_header, smb_vwv1, utc2local(server, mtime));
req->rq_flags |= SMB_REQ_NORETRY;
result = smb_request_ok(req, SMBclose, 0, 0);
smb_rput(req);
out:
return result;
}
/*
* Win NT 4.0 has an apparent bug in that it fails to update the
* modify time when writing to a file. As a workaround, we update
* both modify and access time locally, and post the times to the
* server when closing the file.
*/
static int
smb_proc_close_inode(struct smb_sb_info *server, struct inode * ino)
{
struct smb_inode_info *ei = SMB_I(ino);
int result = 0;
if (smb_is_open(ino))
{
/*
* We clear the open flag in advance, in case another
* process observes the value while we block below.
*/
ei->open = 0;
/*
* Kludge alert: SMB timestamps are accurate only to
* two seconds ... round the times to avoid needless
* cache invalidations!
*/
if (ino->i_mtime.tv_sec & 1) {
ino->i_mtime.tv_sec--;
ino->i_mtime.tv_nsec = 0;
}
if (ino->i_atime.tv_sec & 1) {
ino->i_atime.tv_sec--;
ino->i_atime.tv_nsec = 0;
}
/*
* If the file is open with write permissions,
* update the time stamps to sync mtime and atime.
*/
if ((server->opt.capabilities & SMB_CAP_UNIX) == 0 &&
(server->opt.protocol >= SMB_PROTOCOL_LANMAN2) &&
!(ei->access == SMB_O_RDONLY))
{
struct smb_fattr fattr;
smb_get_inode_attr(ino, &fattr);
smb_proc_setattr_ext(server, ino, &fattr);
}
result = smb_proc_close(server, ei->fileid, ino->i_mtime.tv_sec);
/*
* Force a revalidation after closing ... some servers
* don't post the size until the file has been closed.
*/
if (server->opt.protocol < SMB_PROTOCOL_NT1)
ei->oldmtime = 0;
ei->closed = jiffies;
}
return result;
}
int
smb_close(struct inode *ino)
{
int result = 0;
if (smb_is_open(ino)) {
struct smb_sb_info *server = server_from_inode(ino);
result = smb_proc_close_inode(server, ino);
}
return result;
}
/*
* This is used to close a file following a failed instantiate.
* Since we don't have an inode, we can't use any of the above.
*/
int
smb_close_fileid(struct dentry *dentry, __u16 fileid)
{
struct smb_sb_info *server = server_from_dentry(dentry);
int result;
result = smb_proc_close(server, fileid, get_seconds());
return result;
}
/* In smb_proc_read and smb_proc_write we do not retry, because the
file-id would not be valid after a reconnection. */
static void
smb_proc_read_data(struct smb_request *req)
{
req->rq_iov[0].iov_base = req->rq_buffer;
req->rq_iov[0].iov_len = 3;
req->rq_iov[1].iov_base = req->rq_page;
req->rq_iov[1].iov_len = req->rq_rsize;
req->rq_iovlen = 2;
req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd;
}
static int
smb_proc_read(struct inode *inode, loff_t offset, int count, char *data)
{
struct smb_sb_info *server = server_from_inode(inode);
__u16 returned_count, data_len;
unsigned char *buf;
int result;
struct smb_request *req;
u8 rbuf[4];
result = -ENOMEM;
if (! (req = smb_alloc_request(server, 0)))
goto out;
smb_setup_header(req, SMBread, 5, 0);
buf = req->rq_header;
WSET(buf, smb_vwv0, SMB_I(inode)->fileid);
WSET(buf, smb_vwv1, count);
DSET(buf, smb_vwv2, offset);
WSET(buf, smb_vwv4, 0);
req->rq_page = data;
req->rq_rsize = count;
req->rq_callback = smb_proc_read_data;
req->rq_buffer = rbuf;
req->rq_flags |= SMB_REQ_NORETRY | SMB_REQ_STATIC;
result = smb_request_ok(req, SMBread, 5, -1);
if (result < 0)
goto out_free;
returned_count = WVAL(req->rq_header, smb_vwv0);
data_len = WVAL(rbuf, 1);
if (returned_count != data_len) {
printk(KERN_NOTICE "smb_proc_read: returned != data_len\n");
printk(KERN_NOTICE "smb_proc_read: ret_c=%d, data_len=%d\n",
returned_count, data_len);
}
result = data_len;
out_free:
smb_rput(req);
out:
VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n",
inode->i_ino, SMB_I(inode)->fileid, count, result);
return result;
}
static int
smb_proc_write(struct inode *inode, loff_t offset, int count, const char *data)
{
struct smb_sb_info *server = server_from_inode(inode);
int result;
u16 fileid = SMB_I(inode)->fileid;
u8 buf[4];
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, 0)))
goto out;
VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n",
inode->i_ino, fileid, count, offset);
smb_setup_header(req, SMBwrite, 5, count + 3);
WSET(req->rq_header, smb_vwv0, fileid);
WSET(req->rq_header, smb_vwv1, count);
DSET(req->rq_header, smb_vwv2, offset);
WSET(req->rq_header, smb_vwv4, 0);
buf[0] = 1;
WSET(buf, 1, count); /* yes, again ... */
req->rq_iov[1].iov_base = buf;
req->rq_iov[1].iov_len = 3;
req->rq_iov[2].iov_base = (char *) data;
req->rq_iov[2].iov_len = count;
req->rq_iovlen = 3;
req->rq_flags |= SMB_REQ_NORETRY;
result = smb_request_ok(req, SMBwrite, 1, 0);
if (result >= 0)
result = WVAL(req->rq_header, smb_vwv0);
smb_rput(req);
out:
return result;
}
/*
* In smb_proc_readX and smb_proc_writeX we do not retry, because the
* file-id would not be valid after a reconnection.
*/
#define SMB_READX_MAX_PAD 64
static void
smb_proc_readX_data(struct smb_request *req)
{
/* header length, excluding the netbios length (-4) */
int hdrlen = SMB_HEADER_LEN + req->rq_resp_wct*2 - 2;
int data_off = WVAL(req->rq_header, smb_vwv6);
/*
* Some genius made the padding to the data bytes arbitrary.
* So we must first calculate the amount of padding used by the server.
*/
data_off -= hdrlen;
if (data_off > SMB_READX_MAX_PAD || data_off < 0) {
PARANOIA("offset is larger than SMB_READX_MAX_PAD or negative!\n");
PARANOIA("%d > %d || %d < 0\n", data_off, SMB_READX_MAX_PAD, data_off);
req->rq_rlen = req->rq_bufsize + 1;
return;
}
req->rq_iov[0].iov_base = req->rq_buffer;
req->rq_iov[0].iov_len = data_off;
req->rq_iov[1].iov_base = req->rq_page;
req->rq_iov[1].iov_len = req->rq_rsize;
req->rq_iovlen = 2;
req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd;
}
static int
smb_proc_readX(struct inode *inode, loff_t offset, int count, char *data)
{
struct smb_sb_info *server = server_from_inode(inode);
unsigned char *buf;
int result;
struct smb_request *req;
static char pad[SMB_READX_MAX_PAD];
result = -ENOMEM;
if (! (req = smb_alloc_request(server, 0)))
goto out;
smb_setup_header(req, SMBreadX, 12, 0);
buf = req->rq_header;
WSET(buf, smb_vwv0, 0x00ff);
WSET(buf, smb_vwv1, 0);
WSET(buf, smb_vwv2, SMB_I(inode)->fileid);
DSET(buf, smb_vwv3, (u32)offset); /* low 32 bits */
WSET(buf, smb_vwv5, count);
WSET(buf, smb_vwv6, 0);
DSET(buf, smb_vwv7, 0);
WSET(buf, smb_vwv9, 0);
DSET(buf, smb_vwv10, (u32)(offset >> 32)); /* high 32 bits */
WSET(buf, smb_vwv11, 0);
req->rq_page = data;
req->rq_rsize = count;
req->rq_callback = smb_proc_readX_data;
req->rq_buffer = pad;
req->rq_bufsize = SMB_READX_MAX_PAD;
req->rq_flags |= SMB_REQ_STATIC | SMB_REQ_NORETRY;
result = smb_request_ok(req, SMBreadX, 12, -1);
if (result < 0)
goto out_free;
result = WVAL(req->rq_header, smb_vwv5);
out_free:
smb_rput(req);
out:
VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n",
inode->i_ino, SMB_I(inode)->fileid, count, result);
return result;
}
static int
smb_proc_writeX(struct inode *inode, loff_t offset, int count, const char *data)
{
struct smb_sb_info *server = server_from_inode(inode);
int result;
u8 *p;
static u8 pad[4];
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, 0)))
goto out;
VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n",
inode->i_ino, SMB_I(inode)->fileid, count, offset);
p = smb_setup_header(req, SMBwriteX, 14, count + 1);
WSET(req->rq_header, smb_vwv0, 0x00ff);
WSET(req->rq_header, smb_vwv1, 0);
WSET(req->rq_header, smb_vwv2, SMB_I(inode)->fileid);
DSET(req->rq_header, smb_vwv3, (u32)offset); /* low 32 bits */
DSET(req->rq_header, smb_vwv5, 0);
WSET(req->rq_header, smb_vwv7, 0); /* write mode */
WSET(req->rq_header, smb_vwv8, 0);
WSET(req->rq_header, smb_vwv9, 0);
WSET(req->rq_header, smb_vwv10, count); /* data length */
WSET(req->rq_header, smb_vwv11, smb_vwv12 + 2 + 1);
DSET(req->rq_header, smb_vwv12, (u32)(offset >> 32));
req->rq_iov[1].iov_base = pad;
req->rq_iov[1].iov_len = 1;
req->rq_iov[2].iov_base = (char *) data;
req->rq_iov[2].iov_len = count;
req->rq_iovlen = 3;
req->rq_flags |= SMB_REQ_NORETRY;
result = smb_request_ok(req, SMBwriteX, 6, 0);
if (result >= 0)
result = WVAL(req->rq_header, smb_vwv2);
smb_rput(req);
out:
return result;
}
int
smb_proc_create(struct dentry *dentry, __u16 attr, time_t ctime, __u16 *fileid)
{
struct smb_sb_info *server = server_from_dentry(dentry);
char *p;
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
p = smb_setup_header(req, SMBcreate, 3, 0);
WSET(req->rq_header, smb_vwv0, attr);
DSET(req->rq_header, smb_vwv1, utc2local(server, ctime));
result = smb_simple_encode_path(req, &p, dentry, NULL);
if (result < 0)
goto out_free;
smb_setup_bcc(req, p);
result = smb_request_ok(req, SMBcreate, 1, 0);
if (result < 0)
goto out_free;
*fileid = WVAL(req->rq_header, smb_vwv0);
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
int
smb_proc_mv(struct dentry *old_dentry, struct dentry *new_dentry)
{
struct smb_sb_info *server = server_from_dentry(old_dentry);
char *p;
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
p = smb_setup_header(req, SMBmv, 1, 0);
WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN | aDIR);
result = smb_simple_encode_path(req, &p, old_dentry, NULL);
if (result < 0)
goto out_free;
result = smb_simple_encode_path(req, &p, new_dentry, NULL);
if (result < 0)
goto out_free;
smb_setup_bcc(req, p);
if ((result = smb_request_ok(req, SMBmv, 0, 0)) < 0)
goto out_free;
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
/*
* Code common to mkdir and rmdir.
*/
static int
smb_proc_generic_command(struct dentry *dentry, __u8 command)
{
struct smb_sb_info *server = server_from_dentry(dentry);
char *p;
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
p = smb_setup_header(req, command, 0, 0);
result = smb_simple_encode_path(req, &p, dentry, NULL);
if (result < 0)
goto out_free;
smb_setup_bcc(req, p);
result = smb_request_ok(req, command, 0, 0);
if (result < 0)
goto out_free;
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
int
smb_proc_mkdir(struct dentry *dentry)
{
return smb_proc_generic_command(dentry, SMBmkdir);
}
int
smb_proc_rmdir(struct dentry *dentry)
{
return smb_proc_generic_command(dentry, SMBrmdir);
}
#if SMBFS_POSIX_UNLINK
/*
* Removes readonly attribute from a file. Used by unlink to give posix
* semantics.
*/
static int
smb_set_rw(struct dentry *dentry,struct smb_sb_info *server)
{
int result;
struct smb_fattr fattr;
/* FIXME: cifsUE should allow removing a readonly file. */
/* first get current attribute */
smb_init_dirent(server, &fattr);
result = server->ops->getattr(server, dentry, &fattr);
smb_finish_dirent(server, &fattr);
if (result < 0)
return result;
/* if RONLY attribute is set, remove it */
if (fattr.attr & aRONLY) { /* read only attribute is set */
fattr.attr &= ~aRONLY;
result = smb_proc_setattr_core(server, dentry, fattr.attr);
}
return result;
}
#endif
int
smb_proc_unlink(struct dentry *dentry)
{
struct smb_sb_info *server = server_from_dentry(dentry);
int flag = 0;
char *p;
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
retry:
p = smb_setup_header(req, SMBunlink, 1, 0);
WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN);
result = smb_simple_encode_path(req, &p, dentry, NULL);
if (result < 0)
goto out_free;
smb_setup_bcc(req, p);
if ((result = smb_request_ok(req, SMBunlink, 0, 0)) < 0) {
#if SMBFS_POSIX_UNLINK
if (result == -EACCES && !flag) {
/* Posix semantics is for the read-only state
of a file to be ignored in unlink(). In the
SMB world a unlink() is refused on a
read-only file. To make things easier for
unix users we try to override the files
permission if the unlink fails with the
right error.
This introduces a race condition that could
lead to a file being written by someone who
shouldn't have access, but as far as I can
tell that is unavoidable */
/* remove RONLY attribute and try again */
result = smb_set_rw(dentry,server);
if (result == 0) {
flag = 1;
req->rq_flags = 0;
goto retry;
}
}
#endif
goto out_free;
}
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
int
smb_proc_flush(struct smb_sb_info *server, __u16 fileid)
{
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, 0)))
goto out;
smb_setup_header(req, SMBflush, 1, 0);
WSET(req->rq_header, smb_vwv0, fileid);
req->rq_flags |= SMB_REQ_NORETRY;
result = smb_request_ok(req, SMBflush, 0, 0);
smb_rput(req);
out:
return result;
}
static int
smb_proc_trunc32(struct inode *inode, loff_t length)
{
/*
* Writing 0bytes is old-SMB magic for truncating files.
* MAX_NON_LFS should prevent this from being called with a too
* large offset.
*/
return smb_proc_write(inode, length, 0, NULL);
}
static int
smb_proc_trunc64(struct inode *inode, loff_t length)
{
struct smb_sb_info *server = server_from_inode(inode);
int result;
char *param;
char *data;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, 14)))
goto out;
param = req->rq_buffer;
data = req->rq_buffer + 6;
/* FIXME: must we also set allocation size? winNT seems to do that */
WSET(param, 0, SMB_I(inode)->fileid);
WSET(param, 2, SMB_SET_FILE_END_OF_FILE_INFO);
WSET(param, 4, 0);
LSET(data, 0, length);
req->rq_trans2_command = TRANSACT2_SETFILEINFO;
req->rq_ldata = 8;
req->rq_data = data;
req->rq_lparm = 6;
req->rq_parm = param;
req->rq_flags |= SMB_REQ_NORETRY;
result = smb_add_request(req);
if (result < 0)
goto out_free;
result = 0;
if (req->rq_rcls != 0)
result = smb_errno(req);
out_free:
smb_rput(req);
out:
return result;
}
static int
smb_proc_trunc95(struct inode *inode, loff_t length)
{
struct smb_sb_info *server = server_from_inode(inode);
int result = smb_proc_trunc32(inode, length);
/*
* win9x doesn't appear to update the size immediately.
* It will return the old file size after the truncate,
* confusing smbfs. So we force an update.
*
* FIXME: is this still necessary?
*/
smb_proc_flush(server, SMB_I(inode)->fileid);
return result;
}
static void
smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr)
{
memset(fattr, 0, sizeof(*fattr));
fattr->f_nlink = 1;
fattr->f_uid = server->mnt->uid;
fattr->f_gid = server->mnt->gid;
fattr->f_unix = 0;
}
static void
smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr)
{
if (fattr->f_unix)
return;
fattr->f_mode = server->mnt->file_mode;
if (fattr->attr & aDIR) {
fattr->f_mode = server->mnt->dir_mode;
fattr->f_size = SMB_ST_BLKSIZE;
}
/* Check the read-only flag */
if (fattr->attr & aRONLY)
fattr->f_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
/* How many 512 byte blocks do we need for this file? */
fattr->f_blocks = 0;
if (fattr->f_size != 0)
fattr->f_blocks = 1 + ((fattr->f_size-1) >> 9);
return;
}
void
smb_init_root_dirent(struct smb_sb_info *server, struct smb_fattr *fattr,
struct super_block *sb)
{
smb_init_dirent(server, fattr);
fattr->attr = aDIR;
fattr->f_ino = 2; /* traditional root inode number */
fattr->f_mtime = current_fs_time(sb);
smb_finish_dirent(server, fattr);
}
/*
* Decode a dirent for old protocols
*
* qname is filled with the decoded, and possibly translated, name.
* fattr receives decoded attributes
*
* Bugs Noted:
* (1) Pathworks servers may pad the name with extra spaces.
*/
static char *
smb_decode_short_dirent(struct smb_sb_info *server, char *p,
struct qstr *qname, struct smb_fattr *fattr,
unsigned char *name_buf)
{
int len;
/*
* SMB doesn't have a concept of inode numbers ...
*/
smb_init_dirent(server, fattr);
fattr->f_ino = 0; /* FIXME: do we need this? */
p += SMB_STATUS_SIZE; /* reserved (search_status) */
fattr->attr = *p;
fattr->f_mtime.tv_sec = date_dos2unix(server, WVAL(p, 3), WVAL(p, 1));
fattr->f_mtime.tv_nsec = 0;
fattr->f_size = DVAL(p, 5);
fattr->f_ctime = fattr->f_mtime;
fattr->f_atime = fattr->f_mtime;
qname->name = p + 9;
len = strnlen(qname->name, 12);
/*
* Trim trailing blanks for Pathworks servers
*/
while (len > 2 && qname->name[len-1] == ' ')
len--;
smb_finish_dirent(server, fattr);
#if 0
/* FIXME: These only work for ascii chars, and recent smbmount doesn't
allow the flag to be set anyway. It kills const. Remove? */
switch (server->opt.case_handling) {
case SMB_CASE_UPPER:
str_upper(entry->name, len);
break;
case SMB_CASE_LOWER:
str_lower(entry->name, len);
break;
default:
break;
}
#endif
qname->len = 0;
len = server->ops->convert(name_buf, SMB_MAXNAMELEN,
qname->name, len,
server->remote_nls, server->local_nls);
if (len > 0) {
qname->len = len;
qname->name = name_buf;
DEBUG1("len=%d, name=%.*s\n",qname->len,qname->len,qname->name);
}
return p + 22;
}
/*
* This routine is used to read in directory entries from the network.
* Note that it is for short directory name seeks, i.e.: protocol <
* SMB_PROTOCOL_LANMAN2
*/
static int
smb_proc_readdir_short(struct file *filp, void *dirent, filldir_t filldir,
struct smb_cache_control *ctl)
{
struct dentry *dir = filp->f_path.dentry;
struct smb_sb_info *server = server_from_dentry(dir);
struct qstr qname;
struct smb_fattr fattr;
char *p;
int result;
int i, first, entries_seen, entries;
int entries_asked = (server->opt.max_xmit - 100) / SMB_DIRINFO_SIZE;
__u16 bcc;
__u16 count;
char status[SMB_STATUS_SIZE];
static struct qstr mask = {
.name = "*.*",
.len = 3,
};
unsigned char *last_status;
struct smb_request *req;
unsigned char *name_buf;
VERBOSE("%s/%s\n", DENTRY_PATH(dir));
lock_kernel();
result = -ENOMEM;
if (! (name_buf = kmalloc(SMB_MAXNAMELEN, GFP_KERNEL)))
goto out;
first = 1;
entries = 0;
entries_seen = 2; /* implicit . and .. */
result = -ENOMEM;
if (! (req = smb_alloc_request(server, server->opt.max_xmit)))
goto out_name;
while (1) {
p = smb_setup_header(req, SMBsearch, 2, 0);
WSET(req->rq_header, smb_vwv0, entries_asked);
WSET(req->rq_header, smb_vwv1, aDIR);
if (first == 1) {
result = smb_simple_encode_path(req, &p, dir, &mask);
if (result < 0)
goto out_free;
if (p + 3 > (char *)req->rq_buffer + req->rq_bufsize) {
result = -ENAMETOOLONG;
goto out_free;
}
*p++ = 5;
WSET(p, 0, 0);
p += 2;
first = 0;
} else {
if (p + 5 + SMB_STATUS_SIZE >
(char *)req->rq_buffer + req->rq_bufsize) {
result = -ENAMETOOLONG;
goto out_free;
}
*p++ = 4;
*p++ = 0;
*p++ = 5;
WSET(p, 0, SMB_STATUS_SIZE);
p += 2;
memcpy(p, status, SMB_STATUS_SIZE);
p += SMB_STATUS_SIZE;
}
smb_setup_bcc(req, p);
result = smb_request_ok(req, SMBsearch, 1, -1);
if (result < 0) {
if ((req->rq_rcls == ERRDOS) &&
(req->rq_err == ERRnofiles))
break;
goto out_free;
}
count = WVAL(req->rq_header, smb_vwv0);
if (count <= 0)
break;
result = -EIO;
bcc = smb_bcc(req->rq_header);
if (bcc != count * SMB_DIRINFO_SIZE + 3)
goto out_free;
p = req->rq_buffer + 3;
/* Make sure the response fits in the buffer. Fixed sized
entries means we don't have to check in the decode loop. */
last_status = req->rq_buffer + 3 + (count-1) * SMB_DIRINFO_SIZE;
if (last_status + SMB_DIRINFO_SIZE >=
req->rq_buffer + req->rq_bufsize) {
printk(KERN_ERR "smb_proc_readdir_short: "
"last dir entry outside buffer! "
"%d@%p %d@%p\n", SMB_DIRINFO_SIZE, last_status,
req->rq_bufsize, req->rq_buffer);
goto out_free;
}
/* Read the last entry into the status field. */
memcpy(status, last_status, SMB_STATUS_SIZE);
/* Now we are ready to parse smb directory entries. */
for (i = 0; i < count; i++) {
p = smb_decode_short_dirent(server, p,
&qname, &fattr, name_buf);
if (qname.len == 0)
continue;
if (entries_seen == 2 && qname.name[0] == '.') {
if (qname.len == 1)
continue;
if (qname.name[1] == '.' && qname.len == 2)
continue;
}
if (!smb_fill_cache(filp, dirent, filldir, ctl,
&qname, &fattr))
; /* stop reading? */
entries_seen++;
}
}
result = entries;
out_free:
smb_rput(req);
out_name:
kfree(name_buf);
out:
unlock_kernel();
return result;
}
static void smb_decode_unix_basic(struct smb_fattr *fattr, struct smb_sb_info *server, char *p)
{
u64 size, disk_bytes;
/* FIXME: verify nls support. all is sent as utf8? */
fattr->f_unix = 1;
fattr->f_mode = 0;
/* FIXME: use the uniqueID from the remote instead? */
/* 0 L file size in bytes */
/* 8 L file size on disk in bytes (block count) */
/* 40 L uid */
/* 48 L gid */
/* 56 W file type */
/* 60 L devmajor */
/* 68 L devminor */
/* 76 L unique ID (inode) */
/* 84 L permissions */
/* 92 L link count */
size = LVAL(p, 0);
disk_bytes = LVAL(p, 8);
/*
* Some samba versions round up on-disk byte usage
* to 1MB boundaries, making it useless. When seeing
* that, use the size instead.
*/
if (!(disk_bytes & 0xfffff))
disk_bytes = size+511;
fattr->f_size = size;
fattr->f_blocks = disk_bytes >> 9;
fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 16));
fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 24));
fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 32));
if (server->mnt->flags & SMB_MOUNT_UID)
fattr->f_uid = server->mnt->uid;
else
fattr->f_uid = LVAL(p, 40);
if (server->mnt->flags & SMB_MOUNT_GID)
fattr->f_gid = server->mnt->gid;
else
fattr->f_gid = LVAL(p, 48);
fattr->f_mode |= smb_filetype_to_mode(WVAL(p, 56));
if (S_ISBLK(fattr->f_mode) || S_ISCHR(fattr->f_mode)) {
__u64 major = LVAL(p, 60);
__u64 minor = LVAL(p, 68);
fattr->f_rdev = MKDEV(major & 0xffffffff, minor & 0xffffffff);
if (MAJOR(fattr->f_rdev) != (major & 0xffffffff) ||
MINOR(fattr->f_rdev) != (minor & 0xffffffff))
fattr->f_rdev = 0;
}
fattr->f_mode |= LVAL(p, 84);
if ( (server->mnt->flags & SMB_MOUNT_DMODE) &&
(S_ISDIR(fattr->f_mode)) )
fattr->f_mode = (server->mnt->dir_mode & S_IRWXUGO) | S_IFDIR;
else if ( (server->mnt->flags & SMB_MOUNT_FMODE) &&
!(S_ISDIR(fattr->f_mode)) )
fattr->f_mode = (server->mnt->file_mode & S_IRWXUGO) |
(fattr->f_mode & S_IFMT);
}
/*
* Interpret a long filename structure using the specified info level:
* level 1 for anything below NT1 protocol
* level 260 for NT1 protocol
*
* qname is filled with the decoded, and possibly translated, name
* fattr receives decoded attributes.
*
* Bugs Noted:
* (1) Win NT 4.0 appends a null byte to names and counts it in the length!
*/
static char *
smb_decode_long_dirent(struct smb_sb_info *server, char *p, int level,
struct qstr *qname, struct smb_fattr *fattr,
unsigned char *name_buf)
{
char *result;
unsigned int len = 0;
int n;
__u16 date, time;
int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE);
/*
* SMB doesn't have a concept of inode numbers ...
*/
smb_init_dirent(server, fattr);
fattr->f_ino = 0; /* FIXME: do we need this? */
switch (level) {
case 1:
len = *((unsigned char *) p + 22);
qname->name = p + 23;
result = p + 24 + len;
date = WVAL(p, 0);
time = WVAL(p, 2);
fattr->f_ctime.tv_sec = date_dos2unix(server, date, time);
fattr->f_ctime.tv_nsec = 0;
date = WVAL(p, 4);
time = WVAL(p, 6);
fattr->f_atime.tv_sec = date_dos2unix(server, date, time);
fattr->f_atime.tv_nsec = 0;
date = WVAL(p, 8);
time = WVAL(p, 10);
fattr->f_mtime.tv_sec = date_dos2unix(server, date, time);
fattr->f_mtime.tv_nsec = 0;
fattr->f_size = DVAL(p, 12);
/* ULONG allocation size */
fattr->attr = WVAL(p, 20);
VERBOSE("info 1 at %p, len=%d, name=%.*s\n",
p, len, len, qname->name);
break;
case 260:
result = p + WVAL(p, 0);
len = DVAL(p, 60);
if (len > 255) len = 255;
/* NT4 null terminates, unless we are using unicode ... */
qname->name = p + 94;
if (!unicode && len && qname->name[len-1] == '\0')
len--;
fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 8));
fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 16));
fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 24));
/* change time (32) */
fattr->f_size = LVAL(p, 40);
/* alloc size (48) */
fattr->attr = DVAL(p, 56);
VERBOSE("info 260 at %p, len=%d, name=%.*s\n",
p, len, len, qname->name);
break;
case SMB_FIND_FILE_UNIX:
result = p + WVAL(p, 0);
qname->name = p + 108;
len = strlen(qname->name);
/* FIXME: should we check the length?? */
p += 8;
smb_decode_unix_basic(fattr, server, p);
VERBOSE("info SMB_FIND_FILE_UNIX at %p, len=%d, name=%.*s\n",
p, len, len, qname->name);
break;
default:
PARANOIA("Unknown info level %d\n", level);
result = p + WVAL(p, 0);
goto out;
}
smb_finish_dirent(server, fattr);
#if 0
/* FIXME: These only work for ascii chars, and recent smbmount doesn't
allow the flag to be set anyway. Remove? */
switch (server->opt.case_handling) {
case SMB_CASE_UPPER:
str_upper(qname->name, len);
break;
case SMB_CASE_LOWER:
str_lower(qname->name, len);
break;
default:
break;
}
#endif
qname->len = 0;
n = server->ops->convert(name_buf, SMB_MAXNAMELEN,
qname->name, len,
server->remote_nls, server->local_nls);
if (n > 0) {
qname->len = n;
qname->name = name_buf;
}
out:
return result;
}
/* findfirst/findnext flags */
#define SMB_CLOSE_AFTER_FIRST (1<<0)
#define SMB_CLOSE_IF_END (1<<1)
#define SMB_REQUIRE_RESUME_KEY (1<<2)
#define SMB_CONTINUE_BIT (1<<3)
/*
* Note: samba-2.0.7 (at least) has a very similar routine, cli_list, in
* source/libsmb/clilist.c. When looking for smb bugs in the readdir code,
* go there for advise.
*
* Bugs Noted:
* (1) When using Info Level 1 Win NT 4.0 truncates directory listings
* for certain patterns of names and/or lengths. The breakage pattern
* is completely reproducible and can be toggled by the creation of a
* single file. (E.g. echo hi >foo breaks, rm -f foo works.)
*/
static int
smb_proc_readdir_long(struct file *filp, void *dirent, filldir_t filldir,
struct smb_cache_control *ctl)
{
struct dentry *dir = filp->f_path.dentry;
struct smb_sb_info *server = server_from_dentry(dir);
struct qstr qname;
struct smb_fattr fattr;
unsigned char *p, *lastname;
char *mask, *param;
__u16 command;
int first, entries_seen;
/* Both NT and OS/2 accept info level 1 (but see note below). */
int info_level = 260;
const int max_matches = 512;
unsigned int ff_searchcount = 0;
unsigned int ff_eos = 0;
unsigned int ff_lastname = 0;
unsigned int ff_dir_handle = 0;
unsigned int loop_count = 0;
unsigned int mask_len, i;
int result;
struct smb_request *req;
unsigned char *name_buf;
static struct qstr star = {
.name = "*",
.len = 1,
};
lock_kernel();
/*
* We always prefer unix style. Use info level 1 for older
* servers that don't do 260.
*/
if (server->opt.capabilities & SMB_CAP_UNIX)
info_level = SMB_FIND_FILE_UNIX;
else if (server->opt.protocol < SMB_PROTOCOL_NT1)
info_level = 1;
result = -ENOMEM;
if (! (name_buf = kmalloc(SMB_MAXNAMELEN+2, GFP_KERNEL)))
goto out;
if (! (req = smb_alloc_request(server, server->opt.max_xmit)))
goto out_name;
param = req->rq_buffer;
/*
* Encode the initial path
*/
mask = param + 12;
result = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dir, &star);
if (result <= 0)
goto out_free;
mask_len = result - 1; /* mask_len is strlen, not #bytes */
result = 0;
first = 1;
VERBOSE("starting mask_len=%d, mask=%s\n", mask_len, mask);
entries_seen = 2;
ff_eos = 0;
while (ff_eos == 0) {
loop_count += 1;
if (loop_count > 10) {
printk(KERN_WARNING "smb_proc_readdir_long: "
"Looping in FIND_NEXT??\n");
result = -EIO;
break;
}
if (first != 0) {
command = TRANSACT2_FINDFIRST;
WSET(param, 0, aSYSTEM | aHIDDEN | aDIR);
WSET(param, 2, max_matches); /* max count */
WSET(param, 4, SMB_CLOSE_IF_END);
WSET(param, 6, info_level);
DSET(param, 8, 0);
} else {
command = TRANSACT2_FINDNEXT;
VERBOSE("handle=0x%X, lastname=%d, mask=%.*s\n",
ff_dir_handle, ff_lastname, mask_len, mask);
WSET(param, 0, ff_dir_handle); /* search handle */
WSET(param, 2, max_matches); /* max count */
WSET(param, 4, info_level);
DSET(param, 6, 0);
WSET(param, 10, SMB_CONTINUE_BIT|SMB_CLOSE_IF_END);
}
req->rq_trans2_command = command;
req->rq_ldata = 0;
req->rq_data = NULL;
req->rq_lparm = 12 + mask_len + 1;
req->rq_parm = param;
req->rq_flags = 0;
result = smb_add_request(req);
if (result < 0) {
PARANOIA("error=%d, breaking\n", result);
break;
}
if (req->rq_rcls == ERRSRV && req->rq_err == ERRerror) {
/* a damn Win95 bug - sometimes it clags if you
ask it too fast */
schedule_timeout_interruptible(msecs_to_jiffies(200));
continue;
}
if (req->rq_rcls != 0) {
result = smb_errno(req);
PARANOIA("name=%s, result=%d, rcls=%d, err=%d\n",
mask, result, req->rq_rcls, req->rq_err);
break;
}
/* parse out some important return info */
if (first != 0) {
ff_dir_handle = WVAL(req->rq_parm, 0);
ff_searchcount = WVAL(req->rq_parm, 2);
ff_eos = WVAL(req->rq_parm, 4);
ff_lastname = WVAL(req->rq_parm, 8);
} else {
ff_searchcount = WVAL(req->rq_parm, 0);
ff_eos = WVAL(req->rq_parm, 2);
ff_lastname = WVAL(req->rq_parm, 6);
}
if (ff_searchcount == 0)
break;
/* Now we are ready to parse smb directory entries. */
/* point to the data bytes */
p = req->rq_data;
for (i = 0; i < ff_searchcount; i++) {
/* make sure we stay within the buffer */
if (p >= req->rq_data + req->rq_ldata) {
printk(KERN_ERR "smb_proc_readdir_long: "
"dirent pointer outside buffer! "
"%p %d@%p\n",
p, req->rq_ldata, req->rq_data);
result = -EIO; /* always a comm. error? */
goto out_free;
}
p = smb_decode_long_dirent(server, p, info_level,
&qname, &fattr, name_buf);
/* ignore . and .. from the server */
if (entries_seen == 2 && qname.name[0] == '.') {
if (qname.len == 1)
continue;
if (qname.name[1] == '.' && qname.len == 2)
continue;
}
if (!smb_fill_cache(filp, dirent, filldir, ctl,
&qname, &fattr))
; /* stop reading? */
entries_seen++;
}
VERBOSE("received %d entries, eos=%d\n", ff_searchcount,ff_eos);
/*
* We might need the lastname for continuations.
*
* Note that some servers (win95?) point to the filename and
* others (NT4, Samba using NT1) to the dir entry. We assume
* here that those who do not point to a filename do not need
* this info to continue the listing.
*
* OS/2 needs this and talks infolevel 1.
* NetApps want lastname with infolevel 260.
* win2k want lastname with infolevel 260, and points to
* the record not to the name.
* Samba+CifsUnixExt doesn't need lastname.
*
* Both are happy if we return the data they point to. So we do.
* (FIXME: above is not true with win2k)
*/
mask_len = 0;
if (info_level != SMB_FIND_FILE_UNIX &&
ff_lastname > 0 && ff_lastname < req->rq_ldata) {
lastname = req->rq_data + ff_lastname;
switch (info_level) {
case 260:
mask_len = req->rq_ldata - ff_lastname;
break;
case 1:
/* lastname points to a length byte */
mask_len = *lastname++;
if (ff_lastname + 1 + mask_len > req->rq_ldata)
mask_len = req->rq_ldata - ff_lastname - 1;
break;
}
/*
* Update the mask string for the next message.
*/
if (mask_len > 255)
mask_len = 255;
if (mask_len)
strncpy(mask, lastname, mask_len);
}
mask_len = strnlen(mask, mask_len);
VERBOSE("new mask, len=%d@%d of %d, mask=%.*s\n",
mask_len, ff_lastname, req->rq_ldata, mask_len, mask);
first = 0;
loop_count = 0;
}
out_free:
smb_rput(req);
out_name:
kfree(name_buf);
out:
unlock_kernel();
return result;
}
/*
* This version uses the trans2 TRANSACT2_FINDFIRST message
* to get the attribute data.
*
* Bugs Noted:
*/
static int
smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry,
struct smb_fattr *fattr)
{
char *param, *mask;
__u16 date, time;
int mask_len, result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
param = req->rq_buffer;
mask = param + 12;
mask_len = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dentry,NULL);
if (mask_len < 0) {
result = mask_len;
goto out_free;
}
VERBOSE("name=%s, len=%d\n", mask, mask_len);
WSET(param, 0, aSYSTEM | aHIDDEN | aDIR);
WSET(param, 2, 1); /* max count */
WSET(param, 4, 1); /* close after this call */
WSET(param, 6, 1); /* info_level */
DSET(param, 8, 0);
req->rq_trans2_command = TRANSACT2_FINDFIRST;
req->rq_ldata = 0;
req->rq_data = NULL;
req->rq_lparm = 12 + mask_len;
req->rq_parm = param;
req->rq_flags = 0;
result = smb_add_request(req);
if (result < 0)
goto out_free;
if (req->rq_rcls != 0) {
result = smb_errno(req);
#ifdef SMBFS_PARANOIA
if (result != -ENOENT)
PARANOIA("error for %s, rcls=%d, err=%d\n",
mask, req->rq_rcls, req->rq_err);
#endif
goto out_free;
}
/* Make sure we got enough data ... */
result = -EINVAL;
if (req->rq_ldata < 22 || WVAL(req->rq_parm, 2) != 1) {
PARANOIA("bad result for %s, len=%d, count=%d\n",
mask, req->rq_ldata, WVAL(req->rq_parm, 2));
goto out_free;
}
/*
* Decode the response into the fattr ...
*/
date = WVAL(req->rq_data, 0);
time = WVAL(req->rq_data, 2);
fattr->f_ctime.tv_sec = date_dos2unix(server, date, time);
fattr->f_ctime.tv_nsec = 0;
date = WVAL(req->rq_data, 4);
time = WVAL(req->rq_data, 6);
fattr->f_atime.tv_sec = date_dos2unix(server, date, time);
fattr->f_atime.tv_nsec = 0;
date = WVAL(req->rq_data, 8);
time = WVAL(req->rq_data, 10);
fattr->f_mtime.tv_sec = date_dos2unix(server, date, time);
fattr->f_mtime.tv_nsec = 0;
VERBOSE("name=%s, date=%x, time=%x, mtime=%ld\n",
mask, date, time, fattr->f_mtime);
fattr->f_size = DVAL(req->rq_data, 12);
/* ULONG allocation size */
fattr->attr = WVAL(req->rq_data, 20);
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
static int
smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir,
struct smb_fattr *fattr)
{
int result;
char *p;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
p = smb_setup_header(req, SMBgetatr, 0, 0);
result = smb_simple_encode_path(req, &p, dir, NULL);
if (result < 0)
goto out_free;
smb_setup_bcc(req, p);
if ((result = smb_request_ok(req, SMBgetatr, 10, 0)) < 0)
goto out_free;
fattr->attr = WVAL(req->rq_header, smb_vwv0);
fattr->f_mtime.tv_sec = local2utc(server, DVAL(req->rq_header, smb_vwv1));
fattr->f_mtime.tv_nsec = 0;
fattr->f_size = DVAL(req->rq_header, smb_vwv3);
fattr->f_ctime = fattr->f_mtime;
fattr->f_atime = fattr->f_mtime;
#ifdef SMBFS_DEBUG_TIMESTAMP
printk("getattr_core: %s/%s, mtime=%ld\n",
DENTRY_PATH(dir), fattr->f_mtime);
#endif
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
/*
* Bugs Noted:
* (1) Win 95 swaps the date and time fields in the standard info level.
*/
static int
smb_proc_getattr_trans2(struct smb_sb_info *server, struct dentry *dir,
struct smb_request *req, int infolevel)
{
char *p, *param;
int result;
param = req->rq_buffer;
WSET(param, 0, infolevel);
DSET(param, 2, 0);
result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL);
if (result < 0)
goto out;
p = param + 6 + result;
req->rq_trans2_command = TRANSACT2_QPATHINFO;
req->rq_ldata = 0;
req->rq_data = NULL;
req->rq_lparm = p - param;
req->rq_parm = param;
req->rq_flags = 0;
result = smb_add_request(req);
if (result < 0)
goto out;
if (req->rq_rcls != 0) {
VERBOSE("for %s: result=%d, rcls=%d, err=%d\n",
&param[6], result, req->rq_rcls, req->rq_err);
result = smb_errno(req);
goto out;
}
result = -ENOENT;
if (req->rq_ldata < 22) {
PARANOIA("not enough data for %s, len=%d\n",
&param[6], req->rq_ldata);
goto out;
}
result = 0;
out:
return result;
}
static int
smb_proc_getattr_trans2_std(struct smb_sb_info *server, struct dentry *dir,
struct smb_fattr *attr)
{
u16 date, time;
int off_date = 0, off_time = 2;
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
result = smb_proc_getattr_trans2(server, dir, req, SMB_INFO_STANDARD);
if (result < 0)
goto out_free;
/*
* Kludge alert: Win 95 swaps the date and time field,
* contrary to the CIFS docs and Win NT practice.
*/
if (server->mnt->flags & SMB_MOUNT_WIN95) {
off_date = 2;
off_time = 0;
}
date = WVAL(req->rq_data, off_date);
time = WVAL(req->rq_data, off_time);
attr->f_ctime.tv_sec = date_dos2unix(server, date, time);
attr->f_ctime.tv_nsec = 0;
date = WVAL(req->rq_data, 4 + off_date);
time = WVAL(req->rq_data, 4 + off_time);
attr->f_atime.tv_sec = date_dos2unix(server, date, time);
attr->f_atime.tv_nsec = 0;
date = WVAL(req->rq_data, 8 + off_date);
time = WVAL(req->rq_data, 8 + off_time);
attr->f_mtime.tv_sec = date_dos2unix(server, date, time);
attr->f_mtime.tv_nsec = 0;
#ifdef SMBFS_DEBUG_TIMESTAMP
printk(KERN_DEBUG "getattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n",
DENTRY_PATH(dir), date, time, attr->f_mtime);
#endif
attr->f_size = DVAL(req->rq_data, 12);
attr->attr = WVAL(req->rq_data, 20);
out_free:
smb_rput(req);
out:
return result;
}
static int
smb_proc_getattr_trans2_all(struct smb_sb_info *server, struct dentry *dir,
struct smb_fattr *attr)
{
struct smb_request *req;
int result;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
result = smb_proc_getattr_trans2(server, dir, req,
SMB_QUERY_FILE_ALL_INFO);
if (result < 0)
goto out_free;
attr->f_ctime = smb_ntutc2unixutc(LVAL(req->rq_data, 0));
attr->f_atime = smb_ntutc2unixutc(LVAL(req->rq_data, 8));
attr->f_mtime = smb_ntutc2unixutc(LVAL(req->rq_data, 16));
/* change (24) */
attr->attr = WVAL(req->rq_data, 32);
/* pad? (34) */
/* allocated size (40) */
attr->f_size = LVAL(req->rq_data, 48);
out_free:
smb_rput(req);
out:
return result;
}
static int
smb_proc_getattr_unix(struct smb_sb_info *server, struct dentry *dir,
struct smb_fattr *attr)
{
struct smb_request *req;
int result;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
result = smb_proc_getattr_trans2(server, dir, req,
SMB_QUERY_FILE_UNIX_BASIC);
if (result < 0)
goto out_free;
smb_decode_unix_basic(attr, server, req->rq_data);
out_free:
smb_rput(req);
out:
return result;
}
static int
smb_proc_getattr_95(struct smb_sb_info *server, struct dentry *dir,
struct smb_fattr *attr)
{
struct inode *inode = dir->d_inode;
int result;
/* FIXME: why not use the "all" version? */
result = smb_proc_getattr_trans2_std(server, dir, attr);
if (result < 0)
goto out;
/*
* None of the getattr versions here can make win9x return the right
* filesize if there are changes made to an open file.
* A seek-to-end does return the right size, but we only need to do
* that on files we have written.
*/
if (inode && SMB_I(inode)->flags & SMB_F_LOCALWRITE &&
smb_is_open(inode))
{
__u16 fileid = SMB_I(inode)->fileid;
attr->f_size = smb_proc_seek(server, fileid, 2, 0);
}
out:
return result;
}
static int
smb_proc_ops_wait(struct smb_sb_info *server)
{
int result;
result = wait_event_interruptible_timeout(server->conn_wq,
server->conn_complete, 30*HZ);
if (!result || signal_pending(current))
return -EIO;
return 0;
}
static int
smb_proc_getattr_null(struct smb_sb_info *server, struct dentry *dir,
struct smb_fattr *fattr)
{
int result;
if (smb_proc_ops_wait(server) < 0)
return -EIO;
smb_init_dirent(server, fattr);
result = server->ops->getattr(server, dir, fattr);
smb_finish_dirent(server, fattr);
return result;
}
static int
smb_proc_readdir_null(struct file *filp, void *dirent, filldir_t filldir,
struct smb_cache_control *ctl)
{
struct smb_sb_info *server = server_from_dentry(filp->f_path.dentry);
if (smb_proc_ops_wait(server) < 0)
return -EIO;
return server->ops->readdir(filp, dirent, filldir, ctl);
}
int
smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr)
{
struct smb_sb_info *server = server_from_dentry(dir);
int result;
smb_init_dirent(server, fattr);
result = server->ops->getattr(server, dir, fattr);
smb_finish_dirent(server, fattr);
return result;
}
/*
* Because of bugs in the core protocol, we use this only to set
* attributes. See smb_proc_settime() below for timestamp handling.
*
* Bugs Noted:
* (1) If mtime is non-zero, both Win 3.1 and Win 95 fail
* with an undocumented error (ERRDOS code 50). Setting
* mtime to 0 allows the attributes to be set.
* (2) The extra parameters following the name string aren't
* in the CIFS docs, but seem to be necessary for operation.
*/
static int
smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry,
__u16 attr)
{
char *p;
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
p = smb_setup_header(req, SMBsetatr, 8, 0);
WSET(req->rq_header, smb_vwv0, attr);
DSET(req->rq_header, smb_vwv1, 0); /* mtime */
WSET(req->rq_header, smb_vwv3, 0); /* reserved values */
WSET(req->rq_header, smb_vwv4, 0);
WSET(req->rq_header, smb_vwv5, 0);
WSET(req->rq_header, smb_vwv6, 0);
WSET(req->rq_header, smb_vwv7, 0);
result = smb_simple_encode_path(req, &p, dentry, NULL);
if (result < 0)
goto out_free;
if (p + 2 > (char *)req->rq_buffer + req->rq_bufsize) {
result = -ENAMETOOLONG;
goto out_free;
}
*p++ = 4;
*p++ = 0;
smb_setup_bcc(req, p);
result = smb_request_ok(req, SMBsetatr, 0, 0);
if (result < 0)
goto out_free;
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
/*
* Because of bugs in the trans2 setattr messages, we must set
* attributes and timestamps separately. The core SMBsetatr
* message seems to be the only reliable way to set attributes.
*/
int
smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr)
{
struct smb_sb_info *server = server_from_dentry(dir);
int result;
VERBOSE("setting %s/%s, open=%d\n",
DENTRY_PATH(dir), smb_is_open(dir->d_inode));
result = smb_proc_setattr_core(server, dir, fattr->attr);
return result;
}
/*
* Sets the timestamps for an file open with write permissions.
*/
static int
smb_proc_setattr_ext(struct smb_sb_info *server,
struct inode *inode, struct smb_fattr *fattr)
{
__u16 date, time;
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, 0)))
goto out;
smb_setup_header(req, SMBsetattrE, 7, 0);
WSET(req->rq_header, smb_vwv0, SMB_I(inode)->fileid);
/* We don't change the creation time */
WSET(req->rq_header, smb_vwv1, 0);
WSET(req->rq_header, smb_vwv2, 0);
date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time);
WSET(req->rq_header, smb_vwv3, date);
WSET(req->rq_header, smb_vwv4, time);
date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time);
WSET(req->rq_header, smb_vwv5, date);
WSET(req->rq_header, smb_vwv6, time);
#ifdef SMBFS_DEBUG_TIMESTAMP
printk(KERN_DEBUG "smb_proc_setattr_ext: date=%d, time=%d, mtime=%ld\n",
date, time, fattr->f_mtime);
#endif
req->rq_flags |= SMB_REQ_NORETRY;
result = smb_request_ok(req, SMBsetattrE, 0, 0);
if (result < 0)
goto out_free;
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
/*
* Bugs Noted:
* (1) The TRANSACT2_SETPATHINFO message under Win NT 4.0 doesn't
* set the file's attribute flags.
*/
static int
smb_proc_setattr_trans2(struct smb_sb_info *server,
struct dentry *dir, struct smb_fattr *fattr)
{
__u16 date, time;
char *p, *param;
int result;
char data[26];
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
param = req->rq_buffer;
WSET(param, 0, 1); /* Info level SMB_INFO_STANDARD */
DSET(param, 2, 0);
result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL);
if (result < 0)
goto out_free;
p = param + 6 + result;
WSET(data, 0, 0); /* creation time */
WSET(data, 2, 0);
date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time);
WSET(data, 4, date);
WSET(data, 6, time);
date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time);
WSET(data, 8, date);
WSET(data, 10, time);
#ifdef SMBFS_DEBUG_TIMESTAMP
printk(KERN_DEBUG "setattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n",
DENTRY_PATH(dir), date, time, fattr->f_mtime);
#endif
DSET(data, 12, 0); /* size */
DSET(data, 16, 0); /* blksize */
WSET(data, 20, 0); /* attr */
DSET(data, 22, 0); /* ULONG EA size */
req->rq_trans2_command = TRANSACT2_SETPATHINFO;
req->rq_ldata = 26;
req->rq_data = data;
req->rq_lparm = p - param;
req->rq_parm = param;
req->rq_flags = 0;
result = smb_add_request(req);
if (result < 0)
goto out_free;
result = 0;
if (req->rq_rcls != 0)
result = smb_errno(req);
out_free:
smb_rput(req);
out:
return result;
}
/*
* ATTR_MODE 0x001
* ATTR_UID 0x002
* ATTR_GID 0x004
* ATTR_SIZE 0x008
* ATTR_ATIME 0x010
* ATTR_MTIME 0x020
* ATTR_CTIME 0x040
* ATTR_ATIME_SET 0x080
* ATTR_MTIME_SET 0x100
* ATTR_FORCE 0x200
* ATTR_ATTR_FLAG 0x400
*
* major/minor should only be set by mknod.
*/
int
smb_proc_setattr_unix(struct dentry *d, struct iattr *attr,
unsigned int major, unsigned int minor)
{
struct smb_sb_info *server = server_from_dentry(d);
u64 nttime;
char *p, *param;
int result;
char data[100];
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
param = req->rq_buffer;
DEBUG1("valid flags = 0x%04x\n", attr->ia_valid);
WSET(param, 0, SMB_SET_FILE_UNIX_BASIC);
DSET(param, 2, 0);
result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL);
if (result < 0)
goto out_free;
p = param + 6 + result;
/* 0 L file size in bytes */
/* 8 L file size on disk in bytes (block count) */
/* 40 L uid */
/* 48 L gid */
/* 56 W file type enum */
/* 60 L devmajor */
/* 68 L devminor */
/* 76 L unique ID (inode) */
/* 84 L permissions */
/* 92 L link count */
LSET(data, 0, SMB_SIZE_NO_CHANGE);
LSET(data, 8, SMB_SIZE_NO_CHANGE);
LSET(data, 16, SMB_TIME_NO_CHANGE);
LSET(data, 24, SMB_TIME_NO_CHANGE);
LSET(data, 32, SMB_TIME_NO_CHANGE);
LSET(data, 40, SMB_UID_NO_CHANGE);
LSET(data, 48, SMB_GID_NO_CHANGE);
DSET(data, 56, smb_filetype_from_mode(attr->ia_mode));
LSET(data, 60, major);
LSET(data, 68, minor);
LSET(data, 76, 0);
LSET(data, 84, SMB_MODE_NO_CHANGE);
LSET(data, 92, 0);
if (attr->ia_valid & ATTR_SIZE) {
LSET(data, 0, attr->ia_size);
LSET(data, 8, 0); /* can't set anyway */
}
/*
* FIXME: check the conversion function it the correct one
*
* we can't set ctime but we might as well pass this to the server
* and let it ignore it.
*/
if (attr->ia_valid & ATTR_CTIME) {
nttime = smb_unixutc2ntutc(attr->ia_ctime);
LSET(data, 16, nttime);
}
if (attr->ia_valid & ATTR_ATIME) {
nttime = smb_unixutc2ntutc(attr->ia_atime);
LSET(data, 24, nttime);
}
if (attr->ia_valid & ATTR_MTIME) {
nttime = smb_unixutc2ntutc(attr->ia_mtime);
LSET(data, 32, nttime);
}
if (attr->ia_valid & ATTR_UID) {
LSET(data, 40, attr->ia_uid);
}
if (attr->ia_valid & ATTR_GID) {
LSET(data, 48, attr->ia_gid);
}
if (attr->ia_valid & ATTR_MODE) {
LSET(data, 84, attr->ia_mode);
}
req->rq_trans2_command = TRANSACT2_SETPATHINFO;
req->rq_ldata = 100;
req->rq_data = data;
req->rq_lparm = p - param;
req->rq_parm = param;
req->rq_flags = 0;
result = smb_add_request(req);
out_free:
smb_rput(req);
out:
return result;
}
/*
* Set the modify and access timestamps for a file.
*
* Incredibly enough, in all of SMB there is no message to allow
* setting both attributes and timestamps at once.
*
* Bugs Noted:
* (1) Win 95 doesn't support the TRANSACT2_SETFILEINFO message
* with info level 1 (INFO_STANDARD).
* (2) Win 95 seems not to support setting directory timestamps.
* (3) Under the core protocol apparently the only way to set the
* timestamp is to open and close the file.
*/
int
smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr)
{
struct smb_sb_info *server = server_from_dentry(dentry);
struct inode *inode = dentry->d_inode;
int result;
VERBOSE("setting %s/%s, open=%d\n",
DENTRY_PATH(dentry), smb_is_open(inode));
/* setting the time on a Win95 server fails (tridge) */
if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2 &&
!(server->mnt->flags & SMB_MOUNT_WIN95)) {
if (smb_is_open(inode) && SMB_I(inode)->access != SMB_O_RDONLY)
result = smb_proc_setattr_ext(server, inode, fattr);
else
result = smb_proc_setattr_trans2(server, dentry, fattr);
} else {
/*
* Fail silently on directories ... timestamp can't be set?
*/
result = 0;
if (S_ISREG(inode->i_mode)) {
/*
* Set the mtime by opening and closing the file.
* Note that the file is opened read-only, but this
* still allows us to set the date (tridge)
*/
result = -EACCES;
if (!smb_is_open(inode))
smb_proc_open(server, dentry, SMB_O_RDONLY);
if (smb_is_open(inode)) {
inode->i_mtime = fattr->f_mtime;
result = smb_proc_close_inode(server, inode);
}
}
}
return result;
}
int
smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr)
{
struct smb_sb_info *server = SMB_SB(dentry->d_sb);
int result;
char *p;
long unit;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, 0)))
goto out;
smb_setup_header(req, SMBdskattr, 0, 0);
if ((result = smb_request_ok(req, SMBdskattr, 5, 0)) < 0)
goto out_free;
p = SMB_VWV(req->rq_header);
unit = (WVAL(p, 2) * WVAL(p, 4)) >> SMB_ST_BLKSHIFT;
attr->f_blocks = WVAL(p, 0) * unit;
attr->f_bsize = SMB_ST_BLKSIZE;
attr->f_bavail = attr->f_bfree = WVAL(p, 6) * unit;
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
int
smb_proc_read_link(struct smb_sb_info *server, struct dentry *d,
char *buffer, int len)
{
char *p, *param;
int result;
struct smb_request *req;
DEBUG1("readlink of %s/%s\n", DENTRY_PATH(d));
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
param = req->rq_buffer;
WSET(param, 0, SMB_QUERY_FILE_UNIX_LINK);
DSET(param, 2, 0);
result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL);
if (result < 0)
goto out_free;
p = param + 6 + result;
req->rq_trans2_command = TRANSACT2_QPATHINFO;
req->rq_ldata = 0;
req->rq_data = NULL;
req->rq_lparm = p - param;
req->rq_parm = param;
req->rq_flags = 0;
result = smb_add_request(req);
if (result < 0)
goto out_free;
DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
&param[6], result, req->rq_rcls, req->rq_err);
/* copy data up to the \0 or buffer length */
result = len;
if (req->rq_ldata < len)
result = req->rq_ldata;
strncpy(buffer, req->rq_data, result);
out_free:
smb_rput(req);
out:
return result;
}
/*
* Create a symlink object called dentry which points to oldpath.
* Samba does not permit dangling links but returns a suitable error message.
*/
int
smb_proc_symlink(struct smb_sb_info *server, struct dentry *d,
const char *oldpath)
{
char *p, *param;
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
param = req->rq_buffer;
WSET(param, 0, SMB_SET_FILE_UNIX_LINK);
DSET(param, 2, 0);
result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1, d, NULL);
if (result < 0)
goto out_free;
p = param + 6 + result;
req->rq_trans2_command = TRANSACT2_SETPATHINFO;
req->rq_ldata = strlen(oldpath) + 1;
req->rq_data = (char *) oldpath;
req->rq_lparm = p - param;
req->rq_parm = param;
req->rq_flags = 0;
result = smb_add_request(req);
if (result < 0)
goto out_free;
DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
&param[6], result, req->rq_rcls, req->rq_err);
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
/*
* Create a hard link object called new_dentry which points to dentry.
*/
int
smb_proc_link(struct smb_sb_info *server, struct dentry *dentry,
struct dentry *new_dentry)
{
char *p, *param;
int result;
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, PAGE_SIZE)))
goto out;
param = req->rq_buffer;
WSET(param, 0, SMB_SET_FILE_UNIX_HLINK);
DSET(param, 2, 0);
result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1,
new_dentry, NULL);
if (result < 0)
goto out_free;
p = param + 6 + result;
/* Grr, pointless separation of parameters and data ... */
req->rq_data = p;
req->rq_ldata = smb_encode_path(server, p, SMB_MAXPATHLEN+1,
dentry, NULL);
req->rq_trans2_command = TRANSACT2_SETPATHINFO;
req->rq_lparm = p - param;
req->rq_parm = param;
req->rq_flags = 0;
result = smb_add_request(req);
if (result < 0)
goto out_free;
DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
&param[6], result, req->rq_rcls, req->rq_err);
result = 0;
out_free:
smb_rput(req);
out:
return result;
}
static int
smb_proc_query_cifsunix(struct smb_sb_info *server)
{
int result;
int major, minor;
u64 caps;
char param[2];
struct smb_request *req;
result = -ENOMEM;
if (! (req = smb_alloc_request(server, 100)))
goto out;
WSET(param, 0, SMB_QUERY_CIFS_UNIX_INFO);
req->rq_trans2_command = TRANSACT2_QFSINFO;
req->rq_ldata = 0;
req->rq_data = NULL;
req->rq_lparm = 2;
req->rq_parm = param;
req->rq_flags = 0;
result = smb_add_request(req);
if (result < 0)
goto out_free;
if (req->rq_ldata < 12) {
PARANOIA("Not enough data\n");
goto out_free;
}
major = WVAL(req->rq_data, 0);
minor = WVAL(req->rq_data, 2);
DEBUG1("Server implements CIFS Extensions for UNIX systems v%d.%d\n",
major, minor);
/* FIXME: verify that we are ok with this major/minor? */
caps = LVAL(req->rq_data, 4);
DEBUG1("Server capabilities 0x%016llx\n", caps);
out_free:
smb_rput(req);
out:
return result;
}
static void
install_ops(struct smb_ops *dst, struct smb_ops *src)
{
memcpy(dst, src, sizeof(void *) * SMB_OPS_NUM_STATIC);
}
/* < LANMAN2 */
static struct smb_ops smb_ops_core =
{
.read = smb_proc_read,
.write = smb_proc_write,
.readdir = smb_proc_readdir_short,
.getattr = smb_proc_getattr_core,
.truncate = smb_proc_trunc32,
};
/* LANMAN2, OS/2, others? */
static struct smb_ops smb_ops_os2 =
{
.read = smb_proc_read,
.write = smb_proc_write,
.readdir = smb_proc_readdir_long,
.getattr = smb_proc_getattr_trans2_std,
.truncate = smb_proc_trunc32,
};
/* Win95, and possibly some NetApp versions too */
static struct smb_ops smb_ops_win95 =
{
.read = smb_proc_read, /* does not support 12word readX */
.write = smb_proc_write,
.readdir = smb_proc_readdir_long,
.getattr = smb_proc_getattr_95,
.truncate = smb_proc_trunc95,
};
/* Samba, NT4 and NT5 */
static struct smb_ops smb_ops_winNT =
{
.read = smb_proc_readX,
.write = smb_proc_writeX,
.readdir = smb_proc_readdir_long,
.getattr = smb_proc_getattr_trans2_all,
.truncate = smb_proc_trunc64,
};
/* Samba w/ unix extensions. Others? */
static struct smb_ops smb_ops_unix =
{
.read = smb_proc_readX,
.write = smb_proc_writeX,
.readdir = smb_proc_readdir_long,
.getattr = smb_proc_getattr_unix,
/* FIXME: core/ext/time setattr needs to be cleaned up! */
/* .setattr = smb_proc_setattr_unix, */
.truncate = smb_proc_trunc64,
};
/* Place holder until real ops are in place */
static struct smb_ops smb_ops_null =
{
.readdir = smb_proc_readdir_null,
.getattr = smb_proc_getattr_null,
};
void smb_install_null_ops(struct smb_ops *ops)
{
install_ops(ops, &smb_ops_null);
}
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