[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: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
parent
7ba526316a
commit
8af1897158
8 changed files with 130 additions and 67 deletions
29
fs/Kconfig
29
fs/Kconfig
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@ -1871,20 +1871,14 @@ config CIFS
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file servers such as Windows 2000 (including Windows 2003, NT 4
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and Windows XP) as well by Samba (which provides excellent CIFS
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server support for Linux and many other operating systems). Limited
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support for Windows ME and similar servers is provided as well.
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You must use the smbfs client filesystem to access older SMB servers
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such as OS/2 and DOS.
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support for OS/2 and Windows ME and similar servers is provided as well.
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The intent of the cifs module is to provide an advanced
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network file system client for mounting to CIFS compliant servers,
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network file system client for mounting to CIFS compliant servers,
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including support for dfs (hierarchical name space), secure per-user
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session establishment, safe distributed caching (oplock), optional
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packet signing, Unicode and other internationalization improvements,
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and optional Winbind (nsswitch) integration. You do not need to enable
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cifs if running only a (Samba) server. It is possible to enable both
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smbfs and cifs (e.g. if you are using CIFS for accessing Windows 2003
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and Samba 3 servers, and smbfs for accessing old servers). If you need
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to mount to Samba or Windows from this machine, say Y.
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packet signing, Unicode and other internationalization improvements.
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If you need to mount to Samba or Windows from this machine, say Y.
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config CIFS_STATS
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bool "CIFS statistics"
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@ -1977,14 +1971,13 @@ config CIFS_EXPERIMENTAL
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depends on CIFS && EXPERIMENTAL
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help
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Enables cifs features under testing. These features are
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experimental and currently include support for writepages
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(multipage writebehind performance improvements) and directory
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change notification ie fcntl(F_DNOTIFY) as well as some security
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improvements. Some also depend on setting at runtime the
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pseudo-file /proc/fs/cifs/Experimental (which is disabled by
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default). See the file fs/cifs/README for more details.
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If unsure, say N.
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experimental and currently include DFS support and directory
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change notification ie fcntl(F_DNOTIFY), as well as the upcall
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mechanism which will be used for Kerberos session negotiation
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and uid remapping. Some of these features also may depend on
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setting a value of 1 to the pseudo-file /proc/fs/cifs/Experimental
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(which is disabled by default). See the file fs/cifs/README
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for more details. If unsure, say N.
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config CIFS_UPCALL
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bool "Kerberos/SPNEGO advanced session setup (EXPERIMENTAL)"
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@ -4,7 +4,12 @@ Fix oops in list_del during mount caused by unaligned string.
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Fix file corruption which could occur on some large file
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copies caused by writepages page i/o completion bug.
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Seek to SEEK_END forces check for update of file size for non-cached
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files.
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files. Allow file size to be updated on remote extend of locally open,
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non-cached file. Fix reconnect to newer Samba servers (or other servers
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which support the CIFS Unix/POSIX extensions) so that we again tell the
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server the Unix/POSIX cifs capabilities which we support (SetFSInfo).
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Add experimental support for new POSIX Open/Mkdir (which returns
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stat information on the open, and allows setting the mode).
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Version 1.46
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------------
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@ -128,3 +128,11 @@ negotiated size) and send larger write sizes to modern servers.
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4) More exhaustively test against less common servers. More testing
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against Windows 9x, Windows ME servers.
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DOS attrs - returned as pseudo-xattr in Samba format (check VFAT and NTFS for this too)
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mount check for unmatched uids - and uid override
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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?)
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Free threads at umount --force that are stuck on the sesSem
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@ -100,5 +100,5 @@ extern ssize_t cifs_getxattr(struct dentry *, const char *, void *, size_t);
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extern ssize_t cifs_listxattr(struct dentry *, char *, size_t);
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extern int cifs_ioctl (struct inode * inode, struct file * filep,
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unsigned int command, unsigned long arg);
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#define CIFS_VERSION "1.47"
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#define CIFS_VERSION "1.48"
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#endif /* _CIFSFS_H */
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@ -2108,7 +2108,7 @@ typedef struct {
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typedef struct {
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/* reply varies based on requested level */
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} __atribute__((packed)) OPEN_PSX_RSP; /* level 0x209 SetPathInfo data */
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} __attribute__((packed)) OPEN_PSX_RSP; /* level 0x209 SetPathInfo data */
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struct file_internal_info {
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@ -23,6 +23,7 @@
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#include <linux/nls.h>
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struct statfs;
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struct smb_vol;
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/*
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*****************************************************************
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@ -147,6 +148,8 @@ extern int get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
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unsigned int *pnum_referrals,
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unsigned char ** preferrals,
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int remap);
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extern void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
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struct super_block * sb, struct smb_vol * vol);
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extern int CIFSSMBQFSInfo(const int xid, struct cifsTconInfo *tcon,
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struct kstatfs *FSData);
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extern int SMBOldQFSInfo(const int xid, struct cifsTconInfo *tcon,
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@ -158,9 +158,15 @@ small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
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nls_codepage);
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if(!rc && (tcon->tidStatus == CifsNeedReconnect)) {
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mark_open_files_invalid(tcon);
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rc = CIFSTCon(0, tcon->ses, tcon->treeName, tcon
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, nls_codepage);
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rc = CIFSTCon(0, tcon->ses, tcon->treeName,
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tcon, nls_codepage);
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up(&tcon->ses->sesSem);
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/* tell server which Unix caps we support */
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if (tcon->ses->capabilities & CAP_UNIX)
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reset_cifs_unix_caps(0 /* no xid */,
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tcon,
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NULL /* we do not know sb */,
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NULL /* no vol info */);
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/* BB FIXME add code to check if wsize needs
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update due to negotiated smb buffer size
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shrinking */
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@ -298,6 +304,12 @@ smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
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rc = CIFSTCon(0, tcon->ses, tcon->treeName,
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tcon, nls_codepage);
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up(&tcon->ses->sesSem);
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/* tell server which Unix caps we support */
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if (tcon->ses->capabilities & CAP_UNIX)
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reset_cifs_unix_caps(0 /* no xid */,
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tcon,
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NULL /* do not know sb */,
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NULL /* no vol info */);
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/* BB FIXME add code to check if wsize needs
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update due to negotiated smb buffer size
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shrinking */
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@ -1613,6 +1613,76 @@ ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
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return rc;
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}
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void reset_cifs_unix_caps(int xid, struct cifsTconInfo * tcon,
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struct super_block * sb, struct smb_vol * vol_info)
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{
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/* if we are reconnecting then should we check to see if
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* any requested capabilities changed locally e.g. via
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* remount but we can not do much about it here
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* if they have (even if we could detect it by the following)
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* Perhaps we could add a backpointer to array of sb from tcon
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* or if we change to make all sb to same share the same
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* sb as NFS - then we only have one backpointer to sb.
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* What if we wanted to mount the server share twice once with
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* and once without posixacls or posix paths? */
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__u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
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if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
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__u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
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/* check for reconnect case in which we do not
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want to change the mount behavior if we can avoid it */
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if(vol_info == NULL) {
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/* turn off POSIX ACL and PATHNAMES if not set
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originally at mount time */
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if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
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cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
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if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
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cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
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}
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cap &= CIFS_UNIX_CAP_MASK;
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if(vol_info && vol_info->no_psx_acl)
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cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
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else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
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cFYI(1,("negotiated posix acl support"));
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if(sb)
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sb->s_flags |= MS_POSIXACL;
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}
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if(vol_info && vol_info->posix_paths == 0)
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cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
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else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
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cFYI(1,("negotiate posix pathnames"));
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if(sb)
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CIFS_SB(sb)->mnt_cifs_flags |=
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CIFS_MOUNT_POSIX_PATHS;
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}
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cFYI(1,("Negotiate caps 0x%x",(int)cap));
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#ifdef CONFIG_CIFS_DEBUG2
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if(cap & CIFS_UNIX_FCNTL_CAP)
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cFYI(1,("FCNTL cap"));
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if(cap & CIFS_UNIX_EXTATTR_CAP)
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cFYI(1,("EXTATTR cap"));
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if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
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cFYI(1,("POSIX path cap"));
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if(cap & CIFS_UNIX_XATTR_CAP)
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cFYI(1,("XATTR cap"));
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if(cap & CIFS_UNIX_POSIX_ACL_CAP)
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cFYI(1,("POSIX ACL cap"));
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#endif /* CIFS_DEBUG2 */
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if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
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cFYI(1,("setting capabilities failed"));
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}
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}
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}
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int
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cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
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char *mount_data, const char *devname)
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@ -1928,20 +1998,25 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
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if (tcon == NULL)
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rc = -ENOMEM;
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else {
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/* check for null share name ie connect to dfs root */
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/* check for null share name ie connecting to
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* dfs root */
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/* BB check if this works for exactly length three strings */
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/* BB check if this works for exactly length
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* three strings */
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if ((strchr(volume_info.UNC + 3, '\\') == NULL)
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&& (strchr(volume_info.UNC + 3, '/') ==
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NULL)) {
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rc = connect_to_dfs_path(xid, pSesInfo,
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"", cifs_sb->local_nls,
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cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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"", cifs_sb->local_nls,
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cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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kfree(volume_info.UNC);
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FreeXid(xid);
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return -ENODEV;
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} else {
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/* BB Do we need to wrap sesSem around
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* this TCon call and Unix SetFS as
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* we do on SessSetup and reconnect? */
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rc = CIFSTCon(xid, pSesInfo,
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volume_info.UNC,
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tcon, cifs_sb->local_nls);
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@ -1962,6 +2037,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
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sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
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}
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/* BB FIXME fix time_gran to be larger for LANMAN sessions */
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sb->s_time_gran = 100;
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/* on error free sesinfo and tcon struct if needed */
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@ -2006,45 +2082,11 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
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/* do not care if following two calls succeed - informational */
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CIFSSMBQFSDeviceInfo(xid, tcon);
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CIFSSMBQFSAttributeInfo(xid, tcon);
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if (tcon->ses->capabilities & CAP_UNIX) {
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if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
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__u64 cap =
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le64_to_cpu(tcon->fsUnixInfo.Capability);
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cap &= CIFS_UNIX_CAP_MASK;
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if(volume_info.no_psx_acl)
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cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
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else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
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cFYI(1,("negotiated posix acl support"));
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sb->s_flags |= MS_POSIXACL;
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}
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if(volume_info.posix_paths == 0)
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cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
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else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
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cFYI(1,("negotiate posix pathnames"));
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cifs_sb->mnt_cifs_flags |=
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CIFS_MOUNT_POSIX_PATHS;
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}
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cFYI(1,("Negotiate caps 0x%x",(int)cap));
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#ifdef CONFIG_CIFS_DEBUG2
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if(cap & CIFS_UNIX_FCNTL_CAP)
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cFYI(1,("FCNTL cap"));
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if(cap & CIFS_UNIX_EXTATTR_CAP)
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cFYI(1,("EXTATTR cap"));
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if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
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cFYI(1,("POSIX path cap"));
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if(cap & CIFS_UNIX_XATTR_CAP)
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cFYI(1,("XATTR cap"));
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if(cap & CIFS_UNIX_POSIX_ACL_CAP)
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cFYI(1,("POSIX ACL cap"));
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#endif /* CIFS_DEBUG2 */
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if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
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cFYI(1,("setting capabilities failed"));
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}
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}
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}
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/* tell server which Unix caps we support */
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if (tcon->ses->capabilities & CAP_UNIX)
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reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
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if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
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cifs_sb->wsize = min(cifs_sb->wsize,
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(tcon->ses->server->maxBuf -
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