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* ceph: whitespace cleanupSage Weil2010-08-03
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: add flock/fcntl lock supportGreg Farnum2010-08-02
| | | | | | | | | | Implement flock inode operation to support advisory file locking. All lock/unlock operations are synchronous with the MDS. Lock state is sent when reconnecting to a recovering MDS to restore the shared lock state. Signed-off-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: define on-wire types, constants for file locking supportGreg Farnum2010-08-02
| | | | | | | | Define the MDS operations and data types for doing file advisory locking with the MDS. Signed-off-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: add CEPH_FEATURE_FLOCK to the supported feature bitsGreg Farnum2010-08-02
| | | | | | | | This informs the server that we will accept v2 client_caps format and v2 client_reconnect format messages. Signed-off-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: support v2 reconnect encodingSage Weil2010-08-02
| | | | | | | Encode either old or v2 encoding of client_reconnect message, depending on whether the peer has the FLOCK feature bit. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: support v2 client_caps encodingSage Weil2010-08-02
| | | | | | Add support for v2 encoding of MClientCaps, which includes a flock blob. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: move AES iv definition to shared headerSage Weil2010-08-02
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix decoding of pool snap infoSage Weil2010-08-02
| | | | | | | | The pool info contains a vector for snap_info_t, not snap ids. This fixes the broken decoding, which would declare teh update corrupt when a pool snapshot was created. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: make ->sync_fs not wait if wait==0Sage Weil2010-08-01
| | | | | | | The ->sync_fs() super op only needs to wait if wait is true. Otherwise, just get some dirty cap writeback started. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: warn on missing snap realmSage Weil2010-08-01
| | | | | | | Well, this Shouldn't Happen, so it would be helpful to know the caller when it does. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: print useful error message when crush rule not foundSage Weil2010-08-01
| | | | | | Include the crush_ruleset in the error message. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: use %pU to print uuid (fsid)Sage Weil2010-08-01
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: sync header defs with server codeSage Weil2010-08-01
| | | | | | Define ROLLBACK op, IFLOCK inode lock (for advisory file locking). Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: clean up header guardsSage Weil2010-08-01
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: strip misleading/obsolete version, feature infoSage Weil2010-08-01
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: specify supported features in super.hSage Weil2010-08-01
| | | | | | | | Specify the supported/required feature bits in super.h client code instead of using the definitions from the shared kernel/userspace headers (which will go away shortly). Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: clean up fsid mount optionSage Weil2010-08-01
| | | | | | | Specify the fsid mount option in hex, not via the major/minor u64 hackery we had before. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: remove unused 'monport' mount optionSage Weil2010-08-01
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: handle ESTALE properly; on receipt send to authority if it wasn'tGreg Farnum2010-08-01
| | | | | Signed-off-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: add ceph_get_cap_for_mds function.Greg Farnum2010-08-01
| | | | | Signed-off-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: connect to export targets on cap exportSage Weil2010-08-01
| | | | | | | When we get a cap EXPORT message, make sure we are connected to all export targets to ensure we can handle the matching IMPORT. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: connect to export targets if mds is laggySage Weil2010-08-01
| | | | | | | | If an MDS we are talking to may have failed, we need to open sessions to its potential export targets to ensure that any in-progress migration that may have involved some of our caps is properly handled. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: introduce helper to connect to mds export targetsSage Weil2010-08-01
| | | | | | | There are a few cases where we need to open sessions with a given mds's potential export targets. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: only set num_pages in calc_layoutSage Weil2010-08-01
| | | | | | Setting it elsewhere is unnecessary and more fragile. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: do caps accounting per mds_clientYehuda Sadeh2010-08-01
| | | | | | | | | Caps related accounting is now being done per mds client instead of just being global. This prepares ground work for a later revision of the caps preallocated reservation list. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: track laggy state of mds from mdsmapSage Weil2010-08-01
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: code cleanupYehuda Sadeh2010-08-01
| | | | | | | Mainly fixing minor issues reported by sparse. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: skip if no auth cap in flush_snapsSage Weil2010-08-01
| | | | | | | | If we have a capsnap but no auth cap (e.g. because it is migrating to another mds), bail out and do nothing for now. Do NOT remove the capsnap from the flush list. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: simplify caps revocation, fix for multimdsSage Weil2010-08-01
| | | | | | | | | | | | | The caps revocation should either initiate writeback, invalidateion, or call check_caps to ack or do the dirty work. The primary question is whether we can get away with only checking the auth cap or whether all caps need to be checked. The old code was doing...something else. At the very least, revocations from non-auth MDSs could break by triggering the "check auth cap only" case. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: simplify add_cap_releasesSage Weil2010-08-01
| | | | | | No functional change, aside from more useful debug output. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: drop unused argumentSage Weil2010-08-01
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: perform lazy reads when file mode and caps permitSage Weil2010-08-01
| | | | | | | | | If the file mode is marked as "lazy," perform cached/buffered reads when the caps permit it. Adjust the rdcache_gen and invalidation logic accordingly so that we manage our cache based on the FILE_CACHE -or- FILE_LAZYIO cap bits. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: perform lazy writes when file mode and caps permitSage Weil2010-08-01
| | | | | | | If we have marked a file as "lazy" (using the ceph ioctl), perform buffered writes when the MDS caps allow it. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: add LAZYIO ioctl to mark a file description for lazy consistencySage Weil2010-08-01
| | | | | | | | Allow an application to mark a file descriptor for lazy file consistency semantics, allowing buffered reads and writes when multiple clients are accessing the same file. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: request FILE_LAZYIO cap when LAZY file mode is setSage Weil2010-08-01
| | | | | | | Also clean up the file flags -> file mode -> wanted caps functions while we're at it. This resyncs this file with userspace. Signed-off-by: Sage Weil <sage@newdream.net>
* NFS: Fix a typo in include/linux/nfs_fs.hTrond Myklebust2010-08-01
| | | | | | | | | | | | nfs_commit_inode() needs to be defined irrespectively of whether or not we are supporting NFSv3 and NFSv4. Allow the compiler to optimise away code in the NFSv2-only case by converting it into an inlined stub function. Reported-and-tested-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6Linus Torvalds2010-07-30
|\ | | | | | | | | | | | | * 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: NFS: Ensure that writepage respects the nonblock flag NFS: kswapd must not block in nfs_release_page nfs: include space for the NUL in root path
| * NFS: Ensure that writepage respects the nonblock flagTrond Myklebust2010-07-30
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: kswapd must not block in nfs_release_pageTrond Myklebust2010-07-30
| | | | | | | | | | | | | | | | | | | | | | See https://bugzilla.kernel.org/show_bug.cgi?id=16056 If other processes are blocked waiting for kswapd to free up some memory so that they can make progress, then we cannot allow kswapd to block on those processes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org
| * nfs: include space for the NUL in root pathDan Carpenter2010-07-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In root_nfs_name() it does the following: if (strlen(buf) + strlen(cp) > NFS_MAXPATHLEN) { printk(KERN_ERR "Root-NFS: Pathname for remote directory too long.\n"); return -1; } sprintf(nfs_export_path, buf, cp); In the original code if (strlen(buf) + strlen(cp) == NFS_MAXPATHLEN) then the sprintf() would lead to an overflow. Generally the rest of the code assumes that the path can have NFS_MAXPATHLEN (1024) characters and a NUL terminator so the fix is to add space to the nfs_export_path[] buffer. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | CIFS: Remove __exit mark from cifs_exit_dns_resolver()David Howells2010-07-30
|/ | | | | | | | | | Remove the __exit mark from cifs_exit_dns_resolver() as it's called by the module init routine in case of error, and so may have been discarded during linkage. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* CRED: Fix get_task_cred() and task_state() to not resurrect dead credentialsDavid Howells2010-07-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's possible for get_task_cred() as it currently stands to 'corrupt' a set of credentials by incrementing their usage count after their replacement by the task being accessed. What happens is that get_task_cred() can race with commit_creds(): TASK_1 TASK_2 RCU_CLEANER -->get_task_cred(TASK_2) rcu_read_lock() __cred = __task_cred(TASK_2) -->commit_creds() old_cred = TASK_2->real_cred TASK_2->real_cred = ... put_cred(old_cred) call_rcu(old_cred) [__cred->usage == 0] get_cred(__cred) [__cred->usage == 1] rcu_read_unlock() -->put_cred_rcu() [__cred->usage == 1] panic() However, since a tasks credentials are generally not changed very often, we can reasonably make use of a loop involving reading the creds pointer and using atomic_inc_not_zero() to attempt to increment it if it hasn't already hit zero. If successful, we can safely return the credentials in the knowledge that, even if the task we're accessing has released them, they haven't gone to the RCU cleanup code. We then change task_state() in procfs to use get_task_cred() rather than calling get_cred() on the result of __task_cred(), as that suffers from the same problem. Without this change, a BUG_ON in __put_cred() or in put_cred_rcu() can be tripped when it is noticed that the usage count is not zero as it ought to be, for example: kernel BUG at kernel/cred.c:168! invalid opcode: 0000 [#1] SMP last sysfs file: /sys/kernel/mm/ksm/run CPU 0 Pid: 2436, comm: master Not tainted 2.6.33.3-85.fc13.x86_64 #1 0HR330/OptiPlex 745 RIP: 0010:[<ffffffff81069881>] [<ffffffff81069881>] __put_cred+0xc/0x45 RSP: 0018:ffff88019e7e9eb8 EFLAGS: 00010202 RAX: 0000000000000001 RBX: ffff880161514480 RCX: 00000000ffffffff RDX: 00000000ffffffff RSI: ffff880140c690c0 RDI: ffff880140c690c0 RBP: ffff88019e7e9eb8 R08: 00000000000000d0 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000040 R12: ffff880140c690c0 R13: ffff88019e77aea0 R14: 00007fff336b0a5c R15: 0000000000000001 FS: 00007f12f50d97c0(0000) GS:ffff880007400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8f461bc000 CR3: 00000001b26ce000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process master (pid: 2436, threadinfo ffff88019e7e8000, task ffff88019e77aea0) Stack: ffff88019e7e9ec8 ffffffff810698cd ffff88019e7e9ef8 ffffffff81069b45 <0> ffff880161514180 ffff880161514480 ffff880161514180 0000000000000000 <0> ffff88019e7e9f28 ffffffff8106aace 0000000000000001 0000000000000246 Call Trace: [<ffffffff810698cd>] put_cred+0x13/0x15 [<ffffffff81069b45>] commit_creds+0x16b/0x175 [<ffffffff8106aace>] set_current_groups+0x47/0x4e [<ffffffff8106ac89>] sys_setgroups+0xf6/0x105 [<ffffffff81009b02>] system_call_fastpath+0x16/0x1b Code: 48 8d 71 ff e8 7e 4e 15 00 85 c0 78 0b 8b 75 ec 48 89 df e8 ef 4a 15 00 48 83 c4 18 5b c9 c3 55 8b 07 8b 07 48 89 e5 85 c0 74 04 <0f> 0b eb fe 65 48 8b 04 25 00 cc 00 00 48 3b b8 58 04 00 00 75 RIP [<ffffffff81069881>] __put_cred+0xc/0x45 RSP <ffff88019e7e9eb8> ---[ end trace df391256a100ebdd ]--- Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ecryptfs: Bugfix for error related to ecryptfs_hash_bucketsAndre Osterhues2010-07-28
| | | | | | | | | | | | | | | The function ecryptfs_uid_hash wrongly assumes that the second parameter to hash_long() is the number of hash buckets instead of the number of hash bits. This patch fixes that and renames the variable ecryptfs_hash_buckets to ecryptfs_hash_bits to make it clearer. Fixes: CVE-2010-2492 Signed-off-by: Andre Osterhues <aosterhues@escrypt.com> Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-07-28
|\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: ceph: use complete_all and wake_up_all ceph: Correct obvious typo of Kconfig variable "CRYPTO_AES" ceph: fix dentry lease release ceph: fix leak of dentry in ceph_init_dentry() error path ceph: fix pg_mapping leak on pg_temp updates ceph: fix d_release dop for snapdir, snapped dentries ceph: avoid dcache readdir for snapdir
| * ceph: use complete_all and wake_up_allYehuda Sadeh2010-07-27
| | | | | | | | | | | | | | | | | | | | This fixes an issue triggered by running concurrent syncs. One of the syncs would go through while the other would just hang indefinitely. In any case, we never actually want to wake a single waiter, so the *_all functions should be used. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: Correct obvious typo of Kconfig variable "CRYPTO_AES"Robert P. J. Day2010-07-25
| | | | | | | | | | Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix dentry lease releaseSage Weil2010-07-23
| | | | | | | | | | | | | | | | | | When we embed a dentry lease release notification in a request, invalidate our lease so we don't think we still have it. Otherwise we can get all sorts of incorrect client behavior when multiple clients are interacting with the same part of the namespace. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix leak of dentry in ceph_init_dentry() error pathSage Weil2010-07-23
| | | | | | | | | | | | If we fail to allocate a ceph_dentry_info, don't leak the dn reference. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix pg_mapping leak on pg_temp updatesSage Weil2010-07-23
| | | | | | | | | | | | | | Free the ceph_pg_mapping structs when they are removed from the pg_temp rbtree. Also fix a leak in the __insert_pg_mapping() error path. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix d_release dop for snapdir, snapped dentriesSage Weil2010-07-23
| | | | | | | | | | | | | | | | | | | | We need to set the d_release dop for snapdir and snapped dentries so that the ceph_dentry_info struct gets released. We also use the dcache to cache readdir results when possible, which only works if we know when dentries are dropped from the cache. Since we don't use the dcache for readdir in the hidden snapdir, avoid that case in ceph_dentry_release. Signed-off-by: Sage Weil <sage@newdream.net>
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