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2011-08-18update cifs version to 1.75Steve French1-1/+1
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-18[CIFS] possible memory corruption on mountSteve French1-1/+2
CIFS cleanup_volume_info_contents() looks like having a memory corruption problem. When UNCip is set to "&vol->UNC[2]" in cifs_parse_mount_options(), it should not be kfree()-ed in cleanup_volume_info_contents(). Introduced in commit b946845a9dc523c759cae2b6a0f6827486c3221a Signed-off-by: J.R. Okajima <hooanon05@yahoo.co.jp> Reviewed-by: Jeff Layton <jlayton@redhat.com> CC: Stable <stable@kernel.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-16cifs: demote cERROR in build_path_from_dentry to cFYIJeff Layton1-2/+2
Running the cthon tests on a recent kernel caused this message to pop occasionally: CIFS VFS: did not end path lookup where expected namelen is 0 Some added debugging showed that namelen and dfsplen were both 0 when this occurred. That means that the read_seqretry returned true. Assuming that the comment inside the if statement is true, this should be harmless and just means that we raced with a rename. If that is the case, then there's no need for alarm and we can demote this to cFYI. While we're at it, print the dfsplen too so that we can see what happened here if the message pops during debugging. Cc: stable@kernel.org Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-11cifs: Do not set cifs/ntfs acl using a file handle (try #4)Shirish Pargaonkar1-27/+1
Set security descriptor using path name instead of a file handle. We can't be sure that the file handle has adequate permission to set a security descriptor (to modify DACL). Function set_cifs_acl_by_fid() has been removed since we can't be sure how a file was opened for writing, a valid request can fail if the file was not opened with two above mentioned permissions. We could have opted to add on WRITE_DAC and WRITE_OWNER permissions to file opens and then use that file handle but adding addtional permissions such as WRITE_DAC and WRITE_OWNER could cause an any open to fail. And it was incorrect to look for read file handle to set a security descriptor anyway. Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-11[CIFS] Cleanup use of CONFIG_CIFS_STATS2 ifdef to make transport routines ↵Steve French3-42/+67
more readable Christoph had requested that the stats related code (in CONFIG_CIFS_STATS2) be moved into helpers to make code flow more readable. This patch should help. For example the following section from transport.c spin_unlock(&GlobalMid_Lock); atomic_inc(&ses->server->num_waiters); wait_event(ses->server->request_q, atomic_read(&ses->server->inFlight) < cifs_max_pending); atomic_dec(&ses->server->num_waiters); spin_lock(&GlobalMid_Lock); becomes simpler (with the patch below): spin_unlock(&GlobalMid_Lock); cifs_num_waiters_inc(server); wait_event(server->request_q, atomic_read(&server->inFlight) < cifs_max_pending); cifs_num_waiters_dec(server); spin_lock(&GlobalMid_Lock); Reviewed-by: Jeff Layton <jlayton@redhat.com> CC: Christoph Hellwig <hch@infradead.org> Signed-off-by: Steve French <sfrench@us.ibm.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
2011-08-05cifs: cope with negative dentries in cifs_get_rootJeff Layton1-0/+4
The loop around lookup_one_len doesn't handle the case where it might return a negative dentry, which can cause an oops on the next pass through the loop. Check for that and break out of the loop with an error of -ENOENT if there is one. Fixes the panic reported here: https://bugzilla.redhat.com/show_bug.cgi?id=727927 Reported-by: TR Bentley <home@trarbentley.net> Reported-by: Iain Arnell <iarnell@gmail.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: stable@kernel.org Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-05cifs: convert prefixpath delimiters in cifs_build_path_to_rootJeff Layton1-12/+2
Regression from 2.6.39... The delimiters in the prefixpath are not being converted based on whether posix paths are in effect. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=727834 Reported-and-Tested-by: Iain Arnell <iarnell@gmail.com> Reported-by: Patrick Oltmann <patrick.oltmann@gmx.net> Cc: Pavel Shilovsky <piastryyy@gmail.com> Cc: stable@kernel.org Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-03CIFS: Fix missing a decrement of inFlight valuePavel Shilovsky1-0/+2
if we failed on getting mid entry in cifs_call_async. Cc: stable@kernel.org Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-03cifs: demote DFS referral lookup errors to cFYIJeff Layton2-4/+5
cifs: demote DFS referral lookup errors to cFYI Now that we call into this routine on every mount, anyone who doesn't have the upcall configured will get multiple printks about failed lookups. Reported-and-Tested-by: Martijn Uffing <mp3project@sarijopen.student.utwente.nl> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-03Revert "cifs: advertise the right receive buffer size to the server"Steve French1-2/+1
This reverts commit c4d3396b261473ded6f370edd1e79ba34e089d7e. Problems discovered with readdir to Samba due to not accounting for header size properly with this change
2011-08-01CIFS: Cleanup demupltiplex thread exiting codePavel Shilovsky1-77/+96
Reviewed-and-Tested-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-01CIFS: Move mid search to a separate functionPavel Shilovsky1-65/+61
Reviewed-and-Tested-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-01CIFS: Move RFC1002 check to a separate functionPavel Shilovsky1-49/+67
Reviewed-and-Tested-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-01CIFS: Simplify socket reading in demultiplex threadPavel Shilovsky1-83/+71
Move reading to separate function and remove csocket variable. Also change semantic in a little: goto incomplete_rcv only when we get -EAGAIN (or a familiar error) while reading rfc1002 header. In this case we don't check for echo timeout when we don't get whole header at once, as it was before. Reviewed-and-Tested-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-08-01CIFS: Move buffer allocation to a separate functionPavel Shilovsky1-37/+55
Reviewed-and-Tested-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-31cifs: remove unneeded variable initialization in cifs_reconnect_tconJeff Layton1-1/+1
Reported-and-acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-31cifs: simplify refcounting for oplock breaksJeff Layton5-58/+4
Currently, we take a sb->s_active reference and a cifsFileInfo reference when an oplock break workqueue job is queued. This is unnecessary and more complicated than it needs to be. Also as Al points out, deactivate_super has non-trivial locking implications so it's best to avoid that if we can. Instead, just cancel any pending oplock breaks for this filehandle synchronously in cifsFileInfo_put after taking it off the lists. That should ensure that this job doesn't outlive the structures it depends on. Reported-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-31cifs: fix compiler warning in CIFSSMBQAllEAsJeff Layton1-5/+1
The recent fix to the above function causes this compiler warning to pop on some gcc versions: CC [M] fs/cifs/cifssmb.o fs/cifs/cifssmb.c: In function ‘CIFSSMBQAllEAs’: fs/cifs/cifssmb.c:5708: warning: ‘ea_name_len’ may be used uninitialized in this function Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-31cifs: fix name parsing in CIFSSMBQAllEAsJeff Layton1-1/+7
The code that matches EA names in CIFSSMBQAllEAs is incorrect. It uses strncmp to do the comparison with the length limited to the name_len sent in the response. Problem: Suppose we're looking for an attribute named "foobar" and have an attribute before it in the EA list named "foo". The comparison will succeed since we're only looking at the first 3 characters. Fix this by also comparing the length of the provided ea_name with the name_len in the response. If they're not equal then it shouldn't match. Reported-by: Jian Li <jiali@redhat.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-31cifs: don't start signing too earlyJeff Layton1-2/+14
Sniffing traffic on the wire shows that windows clients send a zeroed out signature field in a NEGOTIATE request, and send "BSRSPYL" in the signature field during SESSION_SETUP. Make the cifs client behave the same way. It doesn't seem to make much difference in any server that I've tested against, but it's probably best to follow windows behavior as closely as possible here. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-31cifs: trivial: goto out here is unnecessaryJeff Layton1-6/+0
...and remove some obsolete comments. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-31cifs: advertise the right receive buffer size to the serverJeff Layton1-1/+2
Currently, we mirror the same size back to the server that it sends us. That makes little sense. Instead we should be sending the server the maximum buffer size that we can handle -- CIFSMaxBufSize minus the 4 byte RFC1001 header. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds6-274/+286
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: cifs: Cleanup: check return codes of crypto api calls CIFS: Fix oops while mounting with prefixpath [CIFS] Redundant null check after dereference cifs: use cifs_dirent in cifs_save_resume_key cifs: use cifs_dirent to replace cifs_get_name_from_search_buf cifs: introduce cifs_dirent cifs: cleanup cifs_filldir
2011-07-25cifs: Cleanup: check return codes of crypto api callsShirish Pargaonkar3-23/+103
Check return codes of crypto api calls and either log an error or log an error and return from the calling function with error. Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-25CIFS: Fix oops while mounting with prefixpathPavel Shilovsky1-1/+1
commit fec11dd9a0109fe52fd631e5c510778d6cbff6cc caused a regression when we have already mounted //server/share/a and want to mount //server/share/a/b. The problem is that lookup_one_len calls __lookup_hash with nd pointer as NULL. Then __lookup_hash calls do_revalidate in the case when dentry exists and we end up with NULL pointer deference in cifs_d_revalidate: if (nd->flags & LOOKUP_RCU) return -ECHILD; Fix this by checking nd for NULL. Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Reviewed-by: Shirish Pargaonkar <shirishp@us.ibm.com> CC: Stable <stable@kernel.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-25[CIFS] Redundant null check after dereferenceSteve French1-5/+0
Reviewed-by: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-25cifs: use cifs_dirent in cifs_save_resume_keyChristoph Hellwig2-58/+10
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-25cifs: use cifs_dirent to replace cifs_get_name_from_search_bufChristoph Hellwig1-86/+23
This allows us to parse the on the wire structures only once in cifs_filldir. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-25cifs: introduce cifs_direntChristoph Hellwig1-69/+125
Introduce a generic directory entry structure, and factor the parsing of the various on the wire structures that can represent one into a common helper. Switch cifs_entry_is_dot over to use it as a start. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-25cifs: cleanup cifs_filldirChristoph Hellwig1-44/+36
Use sensible variable names and formatting and remove some superflous checks on entry. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-25CIFS: Fix oops while mounting with prefixpathPavel Shilovsky1-1/+1
commit fec11dd9a0109fe52fd631e5c510778d6cbff6cc caused a regression when we have already mounted //server/share/a and want to mount //server/share/a/b. The problem is that lookup_one_len calls __lookup_hash with nd pointer as NULL. Then __lookup_hash calls do_revalidate in the case when dentry exists and we end up with NULL pointer deference in cifs_d_revalidate: if (nd->flags & LOOKUP_RCU) return -ECHILD; Fix this by checking nd for NULL. Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-22Merge branch 'for-linus' of ↵Linus Torvalds6-19/+35
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (107 commits) vfs: use ERR_CAST for err-ptr tossing in lookup_instantiate_filp isofs: Remove global fs lock jffs2: fix IN_DELETE_SELF on overwriting rename() killing a directory fix IN_DELETE_SELF on overwriting rename() on ramfs et.al. mm/truncate.c: fix build for CONFIG_BLOCK not enabled fs:update the NOTE of the file_operations structure Remove dead code in dget_parent() AFS: Fix silly characters in a comment switch d_add_ci() to d_splice_alias() in "found negative" case as well simplify gfs2_lookup() jfs_lookup(): don't bother with . or .. get rid of useless dget_parent() in btrfs rename() and link() get rid of useless dget_parent() in fs/btrfs/ioctl.c fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers drivers: fix up various ->llseek() implementations fs: handle SEEK_HOLE/SEEK_DATA properly in all fs's that define their own llseek Ext4: handle SEEK_HOLE/SEEK_DATA generically Btrfs: implement our own ->llseek fs: add SEEK_HOLE and SEEK_DATA flags reiserfs: make reiserfs default to barrier=flush ... Fix up trivial conflicts in fs/xfs/linux-2.6/xfs_super.c due to the new shrinker callout for the inode cache, that clashed with the xfs code to start the periodic workers later.
2011-07-21CIFS: Fix wrong length in cifs_iovec_readPavel Shilovsky1-1/+1
Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-20fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlersJosef Bacik2-4/+18
Btrfs needs to be able to control how filemap_write_and_wait_range() is called in fsync to make it less of a painful operation, so push down taking i_mutex and the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some file systems can drop taking the i_mutex altogether it seems, like ext3 and ocfs2. For correctness sake I just pushed everything down in all cases to make sure that we keep the current behavior the same for everybody, and then each individual fs maintainer can make up their mind about what to do from there. Thanks, Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20fs: handle SEEK_HOLE/SEEK_DATA properly in all fs's that define their own llseekJosef Bacik1-2/+5
This converts everybody to handle SEEK_HOLE/SEEK_DATA properly. In some cases we just return -EINVAL, in others we do the normal generic thing, and in others we're simply making sure that the properly due-dilligence is done. For example in NFS/CIFS we need to make sure the file size is update properly for the SEEK_HOLE and SEEK_DATA case, but since it calls the generic llseek stuff itself that is all we have to do. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20don't open-code parent_ino() in assorted ->readdir()Al Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20cifs_lookup(): LOOKUP_OPEN is set only on the last componentAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20LOOKUP_CREATE and LOOKUP_RENAME_TARGET can be set only on the last stepAl Viro1-4/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20no need to check for LOOKUP_OPEN in ->create() instancesAl Viro1-3/+3
... it will be set in nd->flag for all cases with non-NULL nd (i.e. when called from do_last()). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20cifs: fix the type of cifs_demultiplex_thread()Al Viro1-2/+3
... and get rid of a bogus typecast, while we are at it; it's not just that we want a function returning int and not void, but cast to pointer to function taking void * and returning void would be (void (*)(void *)) and not (void *)(void *), TYVM... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20->permission() sanitizing: don't pass flags to ->permission()Al Viro1-1/+1
not used by the instances anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20->permission() sanitizing: don't pass flags to generic_permission()Al Viro1-1/+1
redundant; all callers get it duplicated in mask & MAY_NOT_BLOCK and none of them removes that bit. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20kill check_acl callback of generic_permission()Al Viro1-1/+1
its value depends only on inode and does not change; we might as well store it in ->i_op->check_acl and be done with that. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-19Merge branch 'for-linus' of ↵Linus Torvalds1-71/+29
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: vfs: fix race in rcu lookup of pruned dentry Fix cifs_get_root() [ Edited the last commit to get rid of a 'unused variable "seq"' warning due to Al editing the patch. - Linus ]
2011-07-18Fix cifs_get_root()Al Viro1-71/+29
Add missing ->i_mutex, convert to lookup_one_len() instead of (broken) open-coded analog, cope with getting something like a//b as relative pathname. Simplify the hell out of it, while we are there... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Reviewed-by: Jeff Layton <jlayton@redhat.com>
2011-07-18Merge branch 'for-linus' of ↵Linus Torvalds1-1/+12
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: hppfs_lookup(): don't open-code lookup_one_len() hppfs: fix dentry leak cramfs: get_cramfs_inode() returns ERR_PTR() on failure ufs should use d_splice_alias() fix exofs ->get_parent() ceph analog of cifs build_path_from_dentry() race fix cifs: build_path_from_dentry() race fix
2011-07-16cifs: build_path_from_dentry() race fixAl Viro1-1/+12
deal with d_move() races properly; rename_lock read-retry loop, rcu_read_lock() held while walking to root, d_lock held over subtraction from namelen and copying the component to stabilize ->d_name. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-12[CIFS] update cifs to version 1.74Steve French1-1/+1
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-12[CIFS] update limit for snprintf in cifs_construct_tconSteve French1-1/+1
In 34c87901e113 "Shrink stack space usage in cifs_construct_tcon" we change the size of the username name buffer from MAX_USERNAME_SIZE (256) to 28. This call to snprintf() needs to be updated as well. Reported by Dan Carpenter. Reviewed-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-12cifs: Fix signing failure when server mandates signing for NTLMSSPShirish Pargaonkar1-5/+5
When using NTLMSSP authentication mechanism, if server mandates signing, keep the flags in type 3 messages of the NTLMSSP exchange same as in type 1 messages (i.e. keep the indicated capabilities same). Some of the servers such as Samba, expect the flags such as Negotiate_Key_Exchange in type 3 message of NTLMSSP exchange as well. Some servers like Windows do not. https://bugzilla.samba.org/show_bug.cgi?id=8212 Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
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