file servers such as Windows 2000 (including Windows 2003, NT 4
and Windows XP) as well by Samba (which provides excellent CIFS
server support for Linux and many other operating systems). Limited
- support for Windows ME and similar servers is provided as well.
- You must use the smbfs client filesystem to access older SMB servers
- such as OS/2 and DOS.
+ support for OS/2 and Windows ME and similar servers is provided as well.
The intent of the cifs module is to provide an advanced
- network file system client for mounting to CIFS compliant servers,
+ network file system client for mounting to CIFS compliant servers,
including support for dfs (hierarchical name space), secure per-user
session establishment, safe distributed caching (oplock), optional
- packet signing, Unicode and other internationalization improvements,
- and optional Winbind (nsswitch) integration. You do not need to enable
- cifs if running only a (Samba) server. It is possible to enable both
- smbfs and cifs (e.g. if you are using CIFS for accessing Windows 2003
- and Samba 3 servers, and smbfs for accessing old servers). If you need
- to mount to Samba or Windows from this machine, say Y.
+ packet signing, Unicode and other internationalization improvements.
+ If you need to mount to Samba or Windows from this machine, say Y.
config CIFS_STATS
bool "CIFS statistics"
depends on CIFS && EXPERIMENTAL
help
Enables cifs features under testing. These features are
- experimental and currently include support for writepages
- (multipage writebehind performance improvements) and directory
- change notification ie fcntl(F_DNOTIFY) as well as some security
- improvements. Some also depend on setting at runtime the
- pseudo-file /proc/fs/cifs/Experimental (which is disabled by
- default). See the file fs/cifs/README for more details.
-
- If unsure, say N.
+ experimental and currently include DFS support and directory
+ change notification ie fcntl(F_DNOTIFY), as well as the upcall
+ mechanism which will be used for Kerberos session negotiation
+ and uid remapping. Some of these features also may depend on
+ setting a value of 1 to the pseudo-file /proc/fs/cifs/Experimental
+ (which is disabled by default). See the file fs/cifs/README
+ for more details. If unsure, say N.
config CIFS_UPCALL
bool "Kerberos/SPNEGO advanced session setup (EXPERIMENTAL)"
nls_codepage);
if(!rc && (tcon->tidStatus == CifsNeedReconnect)) {
mark_open_files_invalid(tcon);
- rc = CIFSTCon(0, tcon->ses, tcon->treeName, tcon
- , nls_codepage);
+ rc = CIFSTCon(0, tcon->ses, tcon->treeName,
+ tcon, nls_codepage);
up(&tcon->ses->sesSem);
+ /* tell server which Unix caps we support */
+ if (tcon->ses->capabilities & CAP_UNIX)
+ reset_cifs_unix_caps(0 /* no xid */,
+ tcon,
+ NULL /* we do not know sb */,
+ NULL /* no vol info */);
/* BB FIXME add code to check if wsize needs
update due to negotiated smb buffer size
shrinking */
rc = CIFSTCon(0, tcon->ses, tcon->treeName,
tcon, nls_codepage);
up(&tcon->ses->sesSem);
+ /* tell server which Unix caps we support */
+ if (tcon->ses->capabilities & CAP_UNIX)
+ reset_cifs_unix_caps(0 /* no xid */,
+ tcon,
+ NULL /* do not know sb */,
+ NULL /* no vol info */);
/* BB FIXME add code to check if wsize needs
update due to negotiated smb buffer size
shrinking */
return rc;
}
+void reset_cifs_unix_caps(int xid, struct cifsTconInfo * tcon,
+ struct super_block * sb, struct smb_vol * vol_info)
+{
+ /* if we are reconnecting then should we check to see if
+ * any requested capabilities changed locally e.g. via
+ * remount but we can not do much about it here
+ * if they have (even if we could detect it by the following)
+ * Perhaps we could add a backpointer to array of sb from tcon
+ * or if we change to make all sb to same share the same
+ * sb as NFS - then we only have one backpointer to sb.
+ * What if we wanted to mount the server share twice once with
+ * and once without posixacls or posix paths? */
+ __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
+
+
+ if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
+ __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
+
+ /* check for reconnect case in which we do not
+ want to change the mount behavior if we can avoid it */
+ if(vol_info == NULL) {
+ /* turn off POSIX ACL and PATHNAMES if not set
+ originally at mount time */
+ if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
+ cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
+ if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
+ cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
+
+
+
+
+ }
+
+ cap &= CIFS_UNIX_CAP_MASK;
+ if(vol_info && vol_info->no_psx_acl)
+ cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
+ else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
+ cFYI(1,("negotiated posix acl support"));
+ if(sb)
+ sb->s_flags |= MS_POSIXACL;
+ }
+
+ if(vol_info && vol_info->posix_paths == 0)
+ cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
+ else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
+ cFYI(1,("negotiate posix pathnames"));
+ if(sb)
+ CIFS_SB(sb)->mnt_cifs_flags |=
+ CIFS_MOUNT_POSIX_PATHS;
+ }
+
+ cFYI(1,("Negotiate caps 0x%x",(int)cap));
+#ifdef CONFIG_CIFS_DEBUG2
+ if(cap & CIFS_UNIX_FCNTL_CAP)
+ cFYI(1,("FCNTL cap"));
+ if(cap & CIFS_UNIX_EXTATTR_CAP)
+ cFYI(1,("EXTATTR cap"));
+ if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
+ cFYI(1,("POSIX path cap"));
+ if(cap & CIFS_UNIX_XATTR_CAP)
+ cFYI(1,("XATTR cap"));
+ if(cap & CIFS_UNIX_POSIX_ACL_CAP)
+ cFYI(1,("POSIX ACL cap"));
+#endif /* CIFS_DEBUG2 */
+ if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
+ cFYI(1,("setting capabilities failed"));
+ }
+ }
+}
+
int
cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
char *mount_data, const char *devname)
if (tcon == NULL)
rc = -ENOMEM;
else {
- /* check for null share name ie connect to dfs root */
+ /* check for null share name ie connecting to
+ * dfs root */
- /* BB check if this works for exactly length three strings */
+ /* BB check if this works for exactly length
+ * three strings */
if ((strchr(volume_info.UNC + 3, '\\') == NULL)
&& (strchr(volume_info.UNC + 3, '/') ==
NULL)) {
rc = connect_to_dfs_path(xid, pSesInfo,
- "", cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
+ "", cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
kfree(volume_info.UNC);
FreeXid(xid);
return -ENODEV;
} else {
+ /* BB Do we need to wrap sesSem around
+ * this TCon call and Unix SetFS as
+ * we do on SessSetup and reconnect? */
rc = CIFSTCon(xid, pSesInfo,
volume_info.UNC,
tcon, cifs_sb->local_nls);
sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
}
+ /* BB FIXME fix time_gran to be larger for LANMAN sessions */
sb->s_time_gran = 100;
/* on error free sesinfo and tcon struct if needed */
/* do not care if following two calls succeed - informational */
CIFSSMBQFSDeviceInfo(xid, tcon);
CIFSSMBQFSAttributeInfo(xid, tcon);
-
- if (tcon->ses->capabilities & CAP_UNIX) {
- if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
- __u64 cap =
- le64_to_cpu(tcon->fsUnixInfo.Capability);
- cap &= CIFS_UNIX_CAP_MASK;
- if(volume_info.no_psx_acl)
- cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
- else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
- cFYI(1,("negotiated posix acl support"));
- sb->s_flags |= MS_POSIXACL;
- }
-
- if(volume_info.posix_paths == 0)
- cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
- else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
- cFYI(1,("negotiate posix pathnames"));
- cifs_sb->mnt_cifs_flags |=
- CIFS_MOUNT_POSIX_PATHS;
- }
-
- cFYI(1,("Negotiate caps 0x%x",(int)cap));
-#ifdef CONFIG_CIFS_DEBUG2
- if(cap & CIFS_UNIX_FCNTL_CAP)
- cFYI(1,("FCNTL cap"));
- if(cap & CIFS_UNIX_EXTATTR_CAP)
- cFYI(1,("EXTATTR cap"));
- if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
- cFYI(1,("POSIX path cap"));
- if(cap & CIFS_UNIX_XATTR_CAP)
- cFYI(1,("XATTR cap"));
- if(cap & CIFS_UNIX_POSIX_ACL_CAP)
- cFYI(1,("POSIX ACL cap"));
-#endif /* CIFS_DEBUG2 */
- if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
- cFYI(1,("setting capabilities failed"));
- }
- }
- }
+
+ /* tell server which Unix caps we support */
+ if (tcon->ses->capabilities & CAP_UNIX)
+ reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
+
if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
cifs_sb->wsize = min(cifs_sb->wsize,
(tcon->ses->server->maxBuf -
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