Merge master.kernel.org:/pub/scm/linux/kernel/git/sfrench/cifs-2.6

* master.kernel.org:/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  [CIFS] on reconnect to Samba - reset the unix capabilities
  [CIFS] Allow update of EOF on remote extend of file
  [CIFS] POSIX CIFS Extensions (continued) - POSIX Open
  [CIFS] Additional POSIX CIFS Extensions infolevels

11 files changed, 203 insertions, 97 deletions

diff --git a/fs/Kconfig b/fs/Kconfig
index 488521ed9e9b..a722b5a3f752 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -1864,20 +1864,14 @@ 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"
@@ -1970,14 +1964,13 @@ 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)"
diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 85e3850bf2c9..5fe13593b57f 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -1,8 +1,15 @@
 Version 1.47
 ------------
 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
 ------------
diff --git a/fs/cifs/TODO b/fs/cifs/TODO
index fc34c74ec4be..68372946dc92 100644
--- a/fs/cifs/TODO
+++ b/fs/cifs/TODO
@@ -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
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 01ae24af9cfd..c97c08eb481a 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -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 */
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 068ef51edbf7..7d9505491b16 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -1,7 +1,7 @@
 /*
  *   fs/cifs/cifspdu.h
  *
- *   Copyright (c) International Business Machines  Corp., 2002,2005
+ *   Copyright (c) International Business Machines  Corp., 2002,2007
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   This library is free software; you can redistribute it and/or modify
@@ -544,7 +544,8 @@ typedef union smb_com_session_setup_andx {
 /*      unsigned char  * NativeOS;      */
 /*      unsigned char  * NativeLanMan;  */
 /*      unsigned char  * PrimaryDomain; */
-        } __attribute__((packed)) resp; /* NTLM response with or without extended sec*/
+        } __attribute__((packed)) resp; /* NTLM response 
+                                           (with or without extended sec) */
 
         struct {                /* request format */
                 struct smb_hdr hdr;     /* wct = 10 */
@@ -795,6 +796,8 @@ typedef struct smb_com_openx_rsp {
         __u16  ByteCount;
 } __attribute__((packed)) OPENX_RSP; 
 
+/* For encoding of POSIX Open Request - see trans2 function 0x209 data struct */
+
 /* Legacy write request for older servers */
 typedef struct smb_com_writex_req {
         struct smb_hdr hdr;     /* wct = 12 */
@@ -1352,11 +1355,13 @@ struct smb_t2_rsp {
 #define SMB_QUERY_FILE_UNIX_BASIC       0x200
 #define SMB_QUERY_FILE_UNIX_LINK        0x201
 #define SMB_QUERY_POSIX_ACL             0x204
-#define SMB_QUERY_XATTR                 0x205
+#define SMB_QUERY_XATTR                 0x205  /* e.g. system EA name space */
 #define SMB_QUERY_ATTR_FLAGS            0x206  /* append,immutable etc. */
 #define SMB_QUERY_POSIX_PERMISSION      0x207
 #define SMB_QUERY_POSIX_LOCK            0x208
-/* #define SMB_POSIX_OPEN               0x209 */
+/* #define SMB_POSIX_OPEN               0x209 */
+/* #define SMB_POSIX_UNLINK             0x20a */
+#define SMB_QUERY_FILE__UNIX_INFO2      0x20b
 #define SMB_QUERY_FILE_INTERNAL_INFO    0x3ee
 #define SMB_QUERY_FILE_ACCESS_INFO      0x3f0
 #define SMB_QUERY_FILE_NAME_INFO2       0x3f1 /* 0x30 bytes */
@@ -1377,8 +1382,10 @@ struct smb_t2_rsp {
 #define SMB_SET_ATTR_FLAGS              0x206  /* append, immutable etc. */
 #define SMB_SET_POSIX_LOCK              0x208
 #define SMB_POSIX_OPEN                  0x209
+#define SMB_POSIX_UNLINK                0x20a
+#define SMB_SET_FILE_UNIX_INFO2
 #define SMB_SET_FILE_BASIC_INFO2        0x3ec
-#define SMB_SET_FILE_RENAME_INFORMATION 0x3f2 /* BB check if qpathinfo level too */
+#define SMB_SET_FILE_RENAME_INFORMATION 0x3f2 /* BB check if qpathinfo too */
 #define SMB_FILE_ALL_INFO2              0x3fa
 #define SMB_SET_FILE_ALLOCATION_INFO2   0x3fb
 #define SMB_SET_FILE_END_OF_FILE_INFO2  0x3fc
@@ -1428,7 +1435,7 @@ typedef struct smb_com_transaction2_qpi_rsp {
         struct smb_hdr hdr;     /* wct = 10 + SetupCount */
         struct trans2_resp t2;
         __u16 ByteCount;
-        __u16 Reserved2;        /* parameter word reserved - present for infolevels > 100 */
+        __u16 Reserved2; /* parameter word is present for infolevels > 100 */
 } __attribute__((packed)) TRANSACTION2_QPI_RSP;
 
 typedef struct smb_com_transaction2_spi_req {
@@ -1461,7 +1468,7 @@ typedef struct smb_com_transaction2_spi_rsp {
         struct smb_hdr hdr;     /* wct = 10 + SetupCount */
         struct trans2_resp t2;
         __u16 ByteCount;
-        __u16 Reserved2;        /* parameter word reserved - present for infolevels > 100 */
+        __u16 Reserved2; /* parameter word is present for infolevels > 100 */
 } __attribute__((packed)) TRANSACTION2_SPI_RSP;
 
 struct set_file_rename {
@@ -1627,6 +1634,7 @@ typedef struct smb_com_transaction2_fnext_rsp_parms {
 #define SMB_QUERY_FS_ATTRIBUTE_INFO 0x105
 #define SMB_QUERY_CIFS_UNIX_INFO    0x200
 #define SMB_QUERY_POSIX_FS_INFO     0x201
+#define SMB_QUERY_POSIX_WHO_AM_I    0x202
 #define SMB_QUERY_LABEL_INFO        0x3ea
 #define SMB_QUERY_FS_QUOTA_INFO     0x3ee
 #define SMB_QUERY_FS_FULL_SIZE_INFO 0x3ef
@@ -1659,9 +1667,21 @@ typedef struct smb_com_transaction_qfsi_rsp {
         struct smb_hdr hdr;     /* wct = 10 + SetupCount */
         struct trans2_resp t2;
         __u16 ByteCount;
-        __u8 Pad;               /* may be three bytes *//* followed by data area */
+        __u8 Pad;       /* may be three bytes? *//* followed by data area */
 } __attribute__((packed)) TRANSACTION2_QFSI_RSP;
 
+typedef struct whoami_rsp_data { /* Query level 0x202 */
+        __u32 flags; /* 0 = Authenticated user 1 = GUEST */
+        __u32 mask; /* which flags bits server understands ie 0x0001 */
+        __u64 unix_user_id;
+        __u64 unix_user_gid;
+        __u32 number_of_supplementary_gids; /* may be zero */
+        __u32 number_of_sids; /* may be zero */
+        __u32 length_of_sid_array; /* in bytes - may be zero */
+        __u32 pad; /* reserved - MBZ */
+        /* __u64 gid_array[0]; */  /* may be empty */
+        /* __u8 * psid_list */  /* may be empty */
+} __attribute__((packed)) WHOAMI_RSP_DATA;
 
 /* SETFSInfo Levels */
 #define SMB_SET_CIFS_UNIX_INFO    0x200
@@ -1858,8 +1878,11 @@ typedef struct {
 #define CIFS_UNIX_XATTR_CAP             0x00000004 /* support new namespace   */
 #define CIFS_UNIX_EXTATTR_CAP           0x00000008 /* support chattr/chflag   */
 #define CIFS_UNIX_POSIX_PATHNAMES_CAP   0x00000010 /* Allow POSIX path chars  */
+#define CIFS_UNIX_POSIX_PATH_OPS_CAP    0x00000020 /* Allow new POSIX path based
+                                                      calls including posix open
+                                                      and posix unlink */ 
 #ifdef CONFIG_CIFS_POSIX
-#define CIFS_UNIX_CAP_MASK              0x0000001b
+#define CIFS_UNIX_CAP_MASK              0x0000003b
 #else 
 #define CIFS_UNIX_CAP_MASK              0x00000013
 #endif /* CONFIG_CIFS_POSIX */
@@ -1946,7 +1969,7 @@ typedef struct { /* data block encoding of response to level 263 QPathInfo */
         __le32 AlignmentRequirement;
         __le32 FileNameLength;
         char FileName[1];
-} __attribute__((packed)) FILE_ALL_INFO;                /* level 0x107 QPathInfo */
+} __attribute__((packed)) FILE_ALL_INFO;        /* level 0x107 QPathInfo */
 
 /* defines for enumerating possible values of the Unix type field below */
 #define UNIX_FILE      0
@@ -1970,11 +1993,11 @@ typedef struct {
         __u64 UniqueId;
         __le64 Permissions;
         __le64 Nlinks;
-} __attribute__((packed)) FILE_UNIX_BASIC_INFO;         /* level 0x200 QPathInfo */
+} __attribute__((packed)) FILE_UNIX_BASIC_INFO; /* level 0x200 QPathInfo */
 
 typedef struct {
         char LinkDest[1];
-} __attribute__((packed)) FILE_UNIX_LINK_INFO;          /* level 0x201 QPathInfo */
+} __attribute__((packed)) FILE_UNIX_LINK_INFO;  /* level 0x201 QPathInfo */
 
 /* The following three structures are needed only for
         setting time to NT4 and some older servers via
@@ -2011,7 +2034,7 @@ typedef struct {
         __le64 ChangeTime;
         __le32 Attributes;
         __u32 Pad;
-} __attribute__((packed)) FILE_BASIC_INFO;              /* size info, level 0x101 */
+} __attribute__((packed)) FILE_BASIC_INFO;      /* size info, level 0x101 */
 
 struct file_allocation_info {
         __le64 AllocationSize; /* Note old Samba srvr rounds this up too much */
@@ -2020,7 +2043,7 @@ struct file_allocation_info {
 
 struct file_end_of_file_info {
         __le64 FileSize;                /* offset to end of file */
-} __attribute__((packed));      /* size info, level 0x104 for set, 0x106 for query */
+} __attribute__((packed)); /* size info, level 0x104 for set, 0x106 for query */
 
 struct file_alt_name_info {
         __u8   alt_name[1];
@@ -2075,6 +2098,19 @@ struct cifs_posix_acl { /* access conrol list  (ACL) */
 
 /* end of POSIX ACL definitions */
 
+typedef struct {
+        __u32 OpenFlags; /* same as NT CreateX */
+        __u32 PosixOpenFlags;
+        __u32 Mode;
+        __u16 Level; /* reply level requested (see QPathInfo levels) */
+        __u16 Pad;  /* reserved - MBZ */
+} __attribute__((packed)) OPEN_PSX_REQ; /* level 0x209 SetPathInfo data */
+
+typedef struct {
+        /* reply varies based on requested level */
+} __attribute__((packed)) OPEN_PSX_RSP; /* level 0x209 SetPathInfo data */
+
+
 struct file_internal_info {
         __u64  UniqueId; /* inode number */
 } __attribute__((packed));      /* level 0x3ee */
@@ -2238,7 +2274,8 @@ struct data_blob {
         1) PosixCreateX - to set and return the mode, inode#, device info and
         perhaps add a CreateDevice - to create Pipes and other special .inodes
         Also note POSIX open flags
-        2) Close - to return the last write time to do cache across close more safely
+        2) Close - to return the last write time to do cache across close 
+                more safely
         3) FindFirst return unique inode number - what about resume key, two 
         forms short (matches readdir) and full (enough info to cache inodes)
         4) Mkdir - set mode
@@ -2273,7 +2310,8 @@ struct data_blob {
         TRANSACTION2 (18 cases)
                 SMB_SET_FILE_END_OF_FILE_INFO2 SMB_SET_PATH_END_OF_FILE_INFO2
                 (BB verify that never need to set allocation size)
-                SMB_SET_FILE_BASIC_INFO2 (setting times - BB can it be done via Unix ext?)
+                SMB_SET_FILE_BASIC_INFO2 (setting times - BB can it be done via
+                         Unix ext?)
         
         COPY (note support for copy across directories) - FUTURE, OPTIONAL
         setting/getting OS/2 EAs - FUTURE (BB can this handle
@@ -2293,13 +2331,13 @@ struct data_blob {
         T2 QUERY_PATH_INFO (SMB_QUERY_FILE_UNIX_BASIC) - BB check for missing inode fields
                                         Actually need QUERY_FILE_UNIX_INFO since has inode num
                                         BB what about a) blksize/blkbits/blocks
-                                                                  b) i_version
-                                                                  c) i_rdev
-                                                                  d) notify mask?
-                                                                  e) generation
-                                                                  f) size_seqcount
+                                                          b) i_version
+                                                          c) i_rdev
+                                                          d) notify mask?
+                                                          e) generation
+                                                          f) size_seqcount
         T2 FIND_FIRST/FIND_NEXT FIND_FILE_UNIX
-        TRANS2_GET_DFS_REFERRAL                           - OPTIONAL but recommended
+        TRANS2_GET_DFS_REFERRAL                   - OPTIONAL but recommended
         T2_QFS_INFO QueryDevice/AttributeInfo - OPTIONAL
         
         
@@ -2338,7 +2376,7 @@ typedef struct file_xattr_info {
         __u32 xattr_value_len;
         char  xattr_name[0];
         /* followed by xattr_value[xattr_value_len], no pad */
-} __attribute__((packed)) FILE_XATTR_INFO;      /* extended attribute, info level 0x205 */
+} __attribute__((packed)) FILE_XATTR_INFO; /* extended attribute, info level 0x205 */
 
 
 /* flags for chattr command */
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index f1f8225102f0..6148b82170c4 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -23,6 +23,7 @@
 #include <linux/nls.h>
 
 struct statfs;
+struct smb_vol;
 
 /*
  *****************************************************************
@@ -57,7 +58,7 @@ extern int SendReceiveBlockingLock(const unsigned int /* xid */ ,
                                 int * /* bytes returned */);
 extern int checkSMB(struct smb_hdr *smb, __u16 mid, unsigned int length);
 extern int is_valid_oplock_break(struct smb_hdr *smb, struct TCP_Server_Info *);
-extern int is_size_safe_to_change(struct cifsInodeInfo *);
+extern int is_size_safe_to_change(struct cifsInodeInfo *, __u64 eof);
 extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *);
 extern unsigned int smbCalcSize(struct smb_hdr *ptr);
 extern unsigned int smbCalcSize_LE(struct smb_hdr *ptr);
@@ -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,
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 472e33e0f3cf..b8e91470c27f 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -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 */
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 2caca06b4bae..20ba7dcc9959 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -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 -
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index e9dcf5ee29a2..07ff9351e9ee 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1954,7 +1954,7 @@ static int cifs_readpage(struct file *file, struct page *page)
    refreshing the inode only on increases in the file size 
    but this is tricky to do without racing with writebehind
    page caching in the current Linux kernel design */
-int is_size_safe_to_change(struct cifsInodeInfo *cifsInode)
+int is_size_safe_to_change(struct cifsInodeInfo *cifsInode, __u64 end_of_file)
 {
         struct cifsFileInfo *open_file = NULL;
 
@@ -1976,6 +1976,9 @@ int is_size_safe_to_change(struct cifsInodeInfo *cifsInode)
                         return 1;
                 }
 
+                if(i_size_read(&cifsInode->vfs_inode) < end_of_file)
+                        return 1;
+
                 return 0;
         } else
                 return 1;
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index c4fa91b8b62f..3f5bc83dc3d1 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -140,7 +140,7 @@ int cifs_get_inode_info_unix(struct inode **pinode,
                 inode->i_gid = le64_to_cpu(findData.Gid);
                 inode->i_nlink = le64_to_cpu(findData.Nlinks);
 
-                if (is_size_safe_to_change(cifsInfo)) {
+                if (is_size_safe_to_change(cifsInfo, end_of_file)) {
                 /* can not safely change the file size here if the
                    client is writing to it due to potential races */
 
@@ -491,8 +491,8 @@ int cifs_get_inode_info(struct inode **pinode,
                 /* BB add code here -
                    validate if device or weird share or device type? */
                 }
-                if (is_size_safe_to_change(cifsInfo)) {
-                        /* can not safely change the file size here if the
+                if (is_size_safe_to_change(cifsInfo, le64_to_cpu(pfindData->EndOfFile))) {
+                        /* can not safely shrink the file size here if the
                            client is writing to it due to potential races */
                         i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
 
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 782940be550f..c6220bd27165 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -222,7 +222,7 @@ static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
                 atomic_set(&cifsInfo->inUse, 1);
         }
 
-        if (is_size_safe_to_change(cifsInfo)) {
+        if (is_size_safe_to_change(cifsInfo, end_of_file)) {
                 /* can not safely change the file size here if the 
                 client is writing to it due to potential races */
                 i_size_write(tmp_inode, end_of_file);
@@ -351,10 +351,10 @@ static void unix_fill_in_inode(struct inode *tmp_inode,
         tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
         tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
 
-        if (is_size_safe_to_change(cifsInfo)) {
+        if (is_size_safe_to_change(cifsInfo, end_of_file)) {
                 /* can not safely change the file size here if the 
                 client is writing to it due to potential races */
-                i_size_write(tmp_inode,end_of_file);
+                i_size_write(tmp_inode, end_of_file);
 
         /* 512 bytes (2**9) is the fake blocksize that must be used */
         /* for this calculation, not the real blocksize */