Commit 8af18971 authored by Steve French's avatar Steve French
Browse files

[CIFS] on reconnect to Samba - reset the unix capabilities



After temporary server or network failure and reconneciton, we were not
resending the unix capabilities via SetFSInfo - which confused Samba posix
byte range locking code.

Discovered by jra
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent 7ba52631
......@@ -1871,20 +1871,14 @@ config CIFS
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"
......@@ -1977,14 +1971,13 @@ config CIFS_EXPERIMENTAL
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)"
......
......@@ -4,7 +4,12 @@ Fix oops in list_del during mount caused by unaligned string.
Fix file corruption which could occur on some large file
copies caused by writepages page i/o completion bug.
Seek to SEEK_END forces check for update of file size for non-cached
files.
files. Allow file size to be updated on remote extend of locally open,
non-cached file. Fix reconnect to newer Samba servers (or other servers
which support the CIFS Unix/POSIX extensions) so that we again tell the
server the Unix/POSIX cifs capabilities which we support (SetFSInfo).
Add experimental support for new POSIX Open/Mkdir (which returns
stat information on the open, and allows setting the mode).
Version 1.46
------------
......
......@@ -128,3 +128,11 @@ negotiated size) and send larger write sizes to modern servers.
4) More exhaustively test against less common servers. More testing
against Windows 9x, Windows ME servers.
DOS attrs - returned as pseudo-xattr in Samba format (check VFAT and NTFS for this too)
mount check for unmatched uids - and uid override
Add mount option for Linux extension disable per mount, and partial disable per mount (uid off, symlink/fifo/mknod on but what about posix acls?)
Free threads at umount --force that are stuck on the sesSem
......@@ -100,5 +100,5 @@ extern ssize_t cifs_getxattr(struct dentry *, const char *, void *, size_t);
extern ssize_t cifs_listxattr(struct dentry *, char *, size_t);
extern int cifs_ioctl (struct inode * inode, struct file * filep,
unsigned int command, unsigned long arg);
#define CIFS_VERSION "1.47"
#define CIFS_VERSION "1.48"
#endif /* _CIFSFS_H */
......@@ -2108,7 +2108,7 @@ typedef struct {
typedef struct {
/* reply varies based on requested level */
} __atribute__((packed)) OPEN_PSX_RSP; /* level 0x209 SetPathInfo data */
} __attribute__((packed)) OPEN_PSX_RSP; /* level 0x209 SetPathInfo data */
struct file_internal_info {
......
......@@ -23,6 +23,7 @@
#include <linux/nls.h>
struct statfs;
struct smb_vol;
/*
*****************************************************************
......@@ -147,6 +148,8 @@ extern int get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
unsigned int *pnum_referrals,
unsigned char ** preferrals,
int remap);
extern void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
struct super_block * sb, struct smb_vol * vol);
extern int CIFSSMBQFSInfo(const int xid, struct cifsTconInfo *tcon,
struct kstatfs *FSData);
extern int SMBOldQFSInfo(const int xid, struct cifsTconInfo *tcon,
......
......@@ -158,9 +158,15 @@ small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
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 */
......@@ -298,6 +304,12 @@ smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
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 */
......
......@@ -1613,6 +1613,76 @@ ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
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)
......@@ -1928,20 +1998,25 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
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);
......@@ -1962,6 +2037,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
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 */
......@@ -2006,45 +2082,11 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
/* 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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