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* [DLM] fix compile warningPatrick Caulfield2006-12-15
| | | | | | | | This patch fixes a compile warning in lowcomms-tcp.c indicating that kmem_cache_t is deprecated. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmwLinus Torvalds2006-12-07
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw: (73 commits) [DLM] Clean up lowcomms [GFS2] Change gfs2_fsync() to use write_inode_now() [GFS2] Fix indent in recovery.c [GFS2] Don't flush everything on fdatasync [GFS2] Add a comment about reading the super block [GFS2] Mount problem with the GFS2 code [GFS2] Remove gfs2_check_acl() [DLM] fix format warnings in rcom.c and recoverd.c [GFS2] lock function parameter [DLM] don't accept replies to old recovery messages [DLM] fix size of STATUS_REPLY message [GFS2] fs/gfs2/log.c:log_bmap() fix printk format warning [DLM] fix add_requestqueue checking nodes list [GFS2] Fix recursive locking in gfs2_getattr [GFS2] Fix recursive locking in gfs2_permission [GFS2] Reduce number of arguments to meta_io.c:getbuf() [GFS2] Move gfs2_meta_syncfs() into log.c [GFS2] Fix journal flush problem [GFS2] mark_inode_dirty after write to stuffed file [GFS2] Fix glock ordering on inode creation ...
| * [DLM] Clean up lowcommsPatrick Caulfield2006-12-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes up most of the things pointed out by akpm and Pavel Machek with comments below indicating why some things have been left: Andrew Morton wrote: > >> +static struct nodeinfo *nodeid2nodeinfo(int nodeid, gfp_t alloc) >> +{ >> + struct nodeinfo *ni; >> + int r; >> + int n; >> + >> + down_read(&nodeinfo_lock); > > Given that this function can sleep, I wonder if `alloc' is useful. > > I see lots of callers passing in a literal "0" for `alloc'. That's in fact > a secret (GFP_ATOMIC & ~__GFP_HIGH). I doubt if that's what you really > meant. Particularly as the code could at least have used __GFP_WAIT (aka > GFP_NOIO) which is much, much more reliable than "0". In fact "0" is the > least reliable mode possible. > > IOW, this is all bollixed up. When 0 is passed into nodeid2nodeinfo the function does not try to allocate a new structure at all. it's an indication that the caller only wants the nodeinfo struct for that nodeid if there actually is one in existance. I've tidied the function itself so it's more obvious, (and tidier!) >> +/* Data received from remote end */ >> +static int receive_from_sock(void) >> +{ >> + int ret = 0; >> + struct msghdr msg; >> + struct kvec iov[2]; >> + unsigned len; >> + int r; >> + struct sctp_sndrcvinfo *sinfo; >> + struct cmsghdr *cmsg; >> + struct nodeinfo *ni; >> + >> + /* These two are marginally too big for stack allocation, but this >> + * function is (currently) only called by dlm_recvd so static should be >> + * OK. >> + */ >> + static struct sockaddr_storage msgname; >> + static char incmsg[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))]; > > whoa. This is globally singly-threaded code?? Yes. it is only ever run in the context of dlm_recvd. >> >> +static void initiate_association(int nodeid) >> +{ >> + struct sockaddr_storage rem_addr; >> + static char outcmsg[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))]; > > Another static buffer to worry about. Globally singly-threaded code? Yes. Only ever called by dlm_sendd. >> + >> +/* Send a message */ >> +static int send_to_sock(struct nodeinfo *ni) >> +{ >> + int ret = 0; >> + struct writequeue_entry *e; >> + int len, offset; >> + struct msghdr outmsg; >> + static char outcmsg[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))]; > > Singly-threaded? Yep. >> >> +static void dealloc_nodeinfo(void) >> +{ >> + int i; >> + >> + for (i=1; i<=max_nodeid; i++) { >> + struct nodeinfo *ni = nodeid2nodeinfo(i, 0); >> + if (ni) { >> + idr_remove(&nodeinfo_idr, i); > > Didn't that need locking? Not. it's only ever called at DLM shutdown after all the other threads have been stopped. >> >> +static int write_list_empty(void) >> +{ >> + int status; >> + >> + spin_lock_bh(&write_nodes_lock); >> + status = list_empty(&write_nodes); >> + spin_unlock_bh(&write_nodes_lock); >> + >> + return status; >> +} > > This function's return value is meaningless. As soon as the lock gets > dropped, the return value can get out of sync with reality. > > Looking at the caller, this _might_ happen to be OK, but it's a nasty and > dangerous thing. Really the locking should be moved into the caller. It's just an optimisation to allow the caller to schedule if there is no work to do. if something arrives immediately afterwards then it will get picked up when the process re-awakes (and it will be woken by that arrival). The 'accepting' atomic has gone completely. as Andrew pointed out it didn't really achieve much anyway. I suspect it was a plaster over some other startup or shutdown bug to be honest. Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Andrew Morton <akpm@osdl.org> Cc: Pavel Machek <pavel@ucw.cz>
| * [DLM] fix format warnings in rcom.c and recoverd.cRyusuke Konishi2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes the following gcc warnings generated on the architectures where uint64_t != unsigned long long (e.g. ppc64). fs/dlm/rcom.c:154: warning: format '%llx' expects type 'long long unsigned int', but argument 4 has type 'uint64_t' fs/dlm/rcom.c:154: warning: format '%llx' expects type 'long long unsigned int', but argument 5 has type 'uint64_t' fs/dlm/recoverd.c:48: warning: format '%llx' expects type 'long long unsigned int', but argument 3 has type 'uint64_t' fs/dlm/recoverd.c:202: warning: format '%llx' expects type 'long long unsigned int', but argument 3 has type 'uint64_t' fs/dlm/recoverd.c:210: warning: format '%llx' expects type 'long long unsigned int', but argument 3 has type 'uint64_t' Signed-off-by: Ryusuke Konishi <ryusuke@osrg.net> Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] don't accept replies to old recovery messagesDavid Teigland2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We often abort a recovery after sending a status request to a remote node. We want to ignore any potential status reply we get from the remote node. If we get one of these unwanted replies, we've often moved on to the next recovery message and incremented the message sequence counter, so the reply will be ignored due to the seq number. In some cases, we've not moved on to the next message so the seq number of the reply we want to ignore is still correct, causing the reply to be accepted. The next recovery message will then mistake this old reply as a new one. To fix this, we add the flag RCOM_WAIT to indicate when we can accept a new reply. We clear this flag if we abort recovery while waiting for a reply. Before the flag is set again (to allow new replies) we know that any old replies will be rejected due to their sequence number. We also initialize the recovery-message sequence number to a random value when a lockspace is first created. This makes it clear when messages are being rejected from an old instance of a lockspace that has since been recreated. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] fix size of STATUS_REPLY messageDavid Teigland2006-11-30
| | | | | | | | | | | | | | | | | | | | | | When the not_ready routine sends a "fake" status reply with blank status flags, it needs to use the correct size for a normal STATUS_REPLY by including the size of the would-be config parameters. We also fill in the non-existant config parameters with an invalid lvblen value so it's easier to notice if these invalid paratmers are ever being used. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] fix add_requestqueue checking nodes listDavid Teigland2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Requests that arrive after recovery has started are saved in the requestqueue and processed after recovery is done. Some of these requests are purged during recovery if they are from nodes that have been removed. We move the purging of the requests (dlm_purge_requestqueue) to later in the recovery sequence which allows the routine saving requests (dlm_add_requestqueue) to avoid filtering out requests by nodeid since the same will be done by the purge. The current code has add_requestqueue filtering by nodeid but doesn't hold any locks when accessing the list of current nodes. This also means that we need to call the purge routine when the lockspace is being shut down since the add routine will not be rejecting requests itself any more. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] Fix DLM configPatrick Caulfield2006-11-30
| | | | | | | | | | | | | | | | | | | | | | The attached patch fixes the DLM config so that it selects the chosen network transport. It should fix the bug where DLM can be left selected when NET gets unselected. This incorporates all the comments received about this patch. Cc: Adrian Bunk <bunk@stusta.de> Cc: Andrew Morton <akpm@osdl.org> Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] clear sbflags on lock masterDavid Teigland2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | RH BZ 211622 The ALTMODE flag can be set in the lock master's copy of the lock but never cleared, so ALTMODE will also be returned in a subsequent conversion of the lock when it shouldn't be. This results in lock_dlm incorrectly switching to the alternate lock mode when returning the result to gfs which then asserts when it sees the wrong lock state. The fix is to propagate the cleared sbflags value to the master node when the lock is requested. QA's d_rwrandirectlarge test triggers this bug very quickly. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] do full recover_locks barrierDavid Teigland2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Red Hat BZ 211914 The previous patch "[DLM] fix aborted recovery during node removal" was incomplete as discovered with further testing. It set the bit for the RS_LOCKS barrier but did not then wait for the barrier. This is often ok, but sometimes it will cause yet another recovery hang. If it's a new node that also has the lowest nodeid that skips the barrier wait, then it misses the important step of collecting and reporting the barrier status from the other nodes (which is the job of the low nodeid in the barrier wait routine). Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] fix stopping unstarted recoveryDavid Teigland2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Red Hat BZ 211914 When many nodes are joining a lockspace simultaneously, the dlm gets a quick sequence of stop/start events, a pair for adding each node. dlm_controld in user space sends dlm_recoverd in the kernel each stop and start event. dlm_controld will sometimes send the stop before dlm_recoverd has had a chance to take up the previously queued start. The stop aborts the processing of the previous start by setting the RECOVERY_STOP flag. dlm_recoverd is erroneously clearing this flag and ignoring the stop/abort if it happens to take up the start after the stop meant to abort it. The fix is to check the sequence number that's incremented for each stop/start before clearing the flag. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] fix aborted recovery during node removalDavid Teigland2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Red Hat BZ 211914 With the new cluster infrastructure, dlm recovery for a node removal can be aborted and restarted for a node addition. When this happens, the restarted recovery isn't aware that it's doing recovery for the earlier removal as well as the addition. So, it then skips the recovery steps only required when nodes are removed. This can result in locks not being purged for failed/removed nodes. The fix is to check for removed nodes for which recovery has not been completed at the start of a new recovery sequence. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] fix requestqueue raceDavid Teigland2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Red Hat BZ 211914 There's a race between dlm_recoverd (1) enabling locking and (2) clearing out the requestqueue, and dlm_recvd (1) checking if locking is enabled and (2) adding a message to the requestqueue. An order of recoverd(1), recvd(1), recvd(2), recoverd(2) will result in a message being left on the requestqueue. The fix is to have dlm_recvd check if dlm_recoverd has enabled locking after taking the mutex for the requestqueue and if it has processing the message instead of queueing it. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] status messages ping-pong between unmounted nodesDavid Teigland2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Red Hat BZ 213682 If two nodes leave the lockspace (while unmounting the fs in the case of gfs) after one has sent a STATUS message to the other, STATUS/STATUS_REPLY messages will then ping-pong between the nodes when neither of them can find the lockspace in question any longer. We kill this by not sending another STATUS message when we get a STATUS_REPLY for an unknown lockspace. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] res_recover_locks_count not reset when recover_locks is abortedDavid Teigland2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | Red Hat BZ 213684 If a node sends an lkb to the new master (RCOM_LOCK message) during recovery and recovery is then aborted on both nodes before it gets a reply, the res_recover_locks_count needs to be reset to 0 so that when the subsequent recovery comes along and sends the lkb to the new master again the assertion doesn't trigger that checks that counter is zero. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| * [DLM] Add support for tcp communicationsPatrick Caulfield2006-11-30
| | | | | | | | | | | | | | | | | | | | | | | | The following patch adds a TCP based communications layer to the DLM which is compile time selectable. The existing SCTP layer gives the advantage of allowing multihoming, whereas the TCP layer has been heavily tested in previous versions of the DLM and is known to be robust and therefore can be used as a baseline for performance testing. Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* | [PATCH] slab: remove kmem_cache_tChristoph Lameter2006-12-07
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace all uses of kmem_cache_t with struct kmem_cache. The patch was generated using the following script: #!/bin/sh # # Replace one string by another in all the kernel sources. # set -e for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do quilt add $file sed -e "1,\$s/$1/$2/g" $file >/tmp/$$ mv /tmp/$$ $file quilt refresh done The script was run like this sh replace kmem_cache_t "struct kmem_cache" Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [DLM] fix oops in kref_put when removing a lockspacePatrick Caulfield2006-11-06
| | | | | | | | | | Now that the lockspace struct is freed when the last sysfs object is released this patch prevents use of that lockspace by sysfs. We attempt to re-get the lockspace from the lockspace list and fail the request if it has been removed. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] Fix kref_put oopsPatrick Caulfield2006-11-06
| | | | | | | | | | This patch fixes the recounting on the lockspace kobject. Previously the lockspace was freed while userspace could have had a reference to one of its sysfs files, causing an oops in kref_put. Now the lockspace kfree is moved into the kobject release() function Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix iovec length in recvmsgPatrick Caulfield2006-10-20
| | | | | | | | | | I didn't spot that the msg_iovlen was set to 2 if there were two elements in the iovec but left at zero if not :( I think this might be why bob was still seeing trouble. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix iovec length in recvmsgPatrick Caulfield2006-10-12
| | | | | | | | The DLM always passes the iovec length as 1, this is wrong when the circular buffer wraps round. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] Kconfig: don't show an empty DLM menuAdrian Bunk2006-10-12
| | | | | | | | | | | Don't show an empty "Distributed Lock Manager" menu if IP_SCTP=n. Reported by Dmytro Bagrii in kernel Bugzilla #7268. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [PATCH] dlm gfp_t annotationsAl Viro2006-10-09
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [GFS2] inode_diet: Replace inode.u.generic_ip with inode.i_private (gfs)Theodore Ts'o2006-09-28
| | | | | | | | | | | | | | | | | | | | | | | The following patches reduce the size of the VFS inode structure by 28 bytes on a UP x86. (It would be more on an x86_64 system). This is a 10% reduction in the inode size on a UP kernel that is configured in a production mode (i.e., with no spinlock or other debugging functions enabled; if you want to save memory taken up by in-core inodes, the first thing you should do is disable the debugging options; they are responsible for a huge amount of bloat in the VFS inode structure). This patch: The filesystem or device-specific pointer in the inode is inside a union, which is pretty pointless given that all 30+ users of this field have been using the void pointer. Get rid of the union and rename it to i_private, with a comment to explain who is allowed to use the void pointer. This is just a cleanup, but it allows us to reuse the union 'u' for something something where the union will actually be used. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org>
* [GFS2/DLM] Fix trailing whitespaceSteven Whitehouse2006-09-25
| | | | | | | As per Andrew Morton's request, removed trailing whitespace. Cc: Andrew Morton <akpm@osdl.org> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] confirm master for recovered waiting requestsDavid Teigland2006-09-08
| | | | | | | | | | | | | | | | Fixing the following scenario: - A request is on the waiters list waiting for a reply from a remote node. - The request is the first one on the resource, so first_lkid is set. - The remote node fails causing recovery. - During recovery the requesting node becomes master. - The request is now processed locally instead of being a remote operation. - At this point we need to call confirm_master() on the resource since we're certain we're now the master node. This will clear first_lkid. - We weren't calling confirm_master(), so first_lkid was not being cleared causing subsequent requests on that resource to get stuck. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] use snprintf in sysfs showDavid Teigland2006-09-07
| | | | | | | | | Use snprintf(buf, PAGE_SIZE, ...) instead of sprintf in sysfs show methods. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] force removal of user lockspaceDavid Teigland2006-08-31
| | | | | | | | | Check if the FORCEFREE flag has been provided from user space. If so, set the force option to dlm_release_lockspace() so that any remaining locks will be freed. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] add new lockspace to list ealierDavid Teigland2006-08-25
| | | | | | | | | | | | | When a new lockspace was being created, the recoverd thread was being started for it before the lockspace was added to the global list of lockspaces. The new thread was looking up the lockspace in the global list and sometimes not finding it due to the race with the original thread adding it to the list. We need to add the lockspace to the global list before starting the thread instead of after, and if the new thread can't find the lockspace for some reason, it should return an error. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] recover_locks not clearing NEW_MASTER flagDavid Teigland2006-08-24
| | | | | | | | | | When there are no locks on a resource, the recover_locks() function fails to clear the NEW_MASTER flag by going directly to out, missing the line that clears the flag. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] sequence number missing in not_ready replyDavid Teigland2006-08-24
| | | | | | | | | | When a status reply is sent for a lockspace that doesn't yet exist, the message sequence number from the sender was not being copied into the reply causing the sender to ignore the reply. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] down conversion clearing flagsDavid Teigland2006-08-23
| | | | | | | | | | | The down-conversion optimization was resulting in the lkb flags being cleared because the stub message reply had no flags value set. Copy the current flags into the stub message so they'll be copied back into the lkb as part of processing the fake reply. Also add an assertion to catch this error more directly if it exists elsewhere. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] down conversion clearing flagsPatrick Caulfield2006-08-23
| | | | | | | | | Oh, and here's (hopefully) the last of these ua_tmp patches. I think I've caught all the paths now. Sorry it didn't make the last one. Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] preserve lksb address in user conversionsPatrick Caulfield2006-08-23
| | | | | | | | | This patch fixes bz#203444 where the LKSB was lost during userland conversion operations Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] dump rsb and locks on assertDavid Teigland2006-08-21
| | | | | | | | | Introduce new function dlm_dump_rsb() to call within assertions instead of dlm_print_rsb(). The new function dumps info about all locks on the rsb in addition to rsb details. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] move kmap to after spin_unlockDavid Teigland2006-08-11
| | | | | | | | | Doing the kmap() while holding the spinlock was causing recursive spinlock problems. It seems the kmap was scheduling, although there was no warning as I'd expect. Patrick, do we need locking around the kmap? Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] reject replies to old requestsDavid Teigland2006-08-09
| | | | | | | | | | | | When recoveries are aborted by other recoveries we can get replies to status or names requests that we've given up on. This can cause problems if we're making another request and receive an old reply. Add a sequence number to status/names requests and reject replies that don't match. A field already exists for the seq number that's used in other message types. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] show nodeid for recovery messageDavid Teigland2006-08-09
| | | | | | | | To aid debugging, it's useful to be able to see what nodeid the dlm is waiting on for a message reply. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] break from snprintf loopDavid Teigland2006-08-09
| | | | | | | | When the debug buffer has filled up, break from the loop and return the correct number of bytes that have been written. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] abort recovery more quicklyDavid Teigland2006-08-09
| | | | | | | | | When we abort one recovery to do another, break out of the ping_members() routine more quickly, and wake up the dlm_recoverd thread more quickly instead of waiting for it to time out. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] print bad length in assertionDavid Teigland2006-08-09
| | | | | | | Print the violating name length in the assertion. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix userland unlockPatrick Caulfield2006-08-08
| | | | | | | | | | | | This patch fixes the userland DLM unlock code so that it correctly returns the address of the userland lock status block in its completion AST. It fixes bug #201348 Patrick Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix i_privateDavid Teigland2006-07-26
| | | | | | | | | | | | > I think you must have an old version of the base kernel as well? > i_private no longer exists in struct inode, so you'll have to use > something else, I have that patch in my stack but didn't send it; for some reason I thought it was already changed in your git tree. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix broken patchesDavid Teigland2006-07-26
| | | | | | | | | | | | | | On Wed, Jul 26, 2006 at 10:47:14AM +0100, Steven Whitehouse wrote: > Hi, > > I've applied all the patches you sent, but they don't build: Argh, sorry about that... when I fixed these a long time ago they somehow never got included in the quilt patches. I mistakenly assumed the quilt patches matched the source I had in front of me. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] schedule during long loop through locksDavid Teigland2006-07-26
| | | | | | | | The loop through all waiting locks in recover_waiters can potentially be long, so we should schedule explicitly. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix loop in grant_after_purgeDavid Teigland2006-07-26
| | | | | | | | | | The loop in grant_after_purge is intended to find all rsb's in each hash bucket that have the LOCKS_PURGED flag set. The loop was quitting the current bucket after finding just one rsb instead of going until there are no more. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] set purged flag on rsbsDavid Teigland2006-07-26
| | | | | | | | | If a node becomes the new master of an rsb during recovery, the LOCKS_PURGED flag needs to be set on it so that any waiting/converting locks will try to be granted. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] more info through debugfsDavid Teigland2006-07-26
| | | | | | | | Display more information from debugfs, particularly locks waiting for a master lookup or operations waiting for a remote reply. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix whitespace damageDavid Teigland2006-07-21
| | | | | | | My previous dlm patch added trailing whitespace damage, fix that. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix leaking user locksDavid Teigland2006-07-20
| | | | | | | | User NOQUEUE lock requests to a remote node that failed with -EAGAIN were never being removed from a process's list of locks. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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