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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph fixes from Sage Weil:
"Yes, this is a much larger pull than I would like after -rc1. There
are a few things included:
- a few fixes for leaks and incorrect assertions
- a few patches fixing behavior when mapped images are resized
- handling for cloned/layered images that are flattened out from
underneath the client
The last bit was non-trivial, and there is some code movement and
associated cleanup mixed in. This was ready and was meant to go in
last week but I missed the boat on Friday. My only excuse is that I
was waiting for an all clear from the testing and there were many
other shiny things to distract me.
Strictly speaking, handling the flatten case isn't a regression and
could wait, so if you like we can try to pull the series apart, but
Alex and I would much prefer to have it all in as it is a case real
users will hit with 3.10."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (33 commits)
rbd: re-submit flattened write request (part 2)
rbd: re-submit write request for flattened clone
rbd: re-submit read request for flattened clone
rbd: detect when clone image is flattened
rbd: reference count parent requests
rbd: define parent image request routines
rbd: define rbd_dev_unparent()
rbd: don't release write request until necessary
rbd: get parent info on refresh
rbd: ignore zero-overlap parent
rbd: support reading parent page data for writes
rbd: fix parent request size assumption
libceph: init sent and completed when starting
rbd: kill rbd_img_request_get()
rbd: only set up watch for mapped images
rbd: set mapping read-only flag in rbd_add()
rbd: support reading parent page data
rbd: fix an incorrect assertion condition
rbd: define rbd_dev_v2_header_info()
rbd: get rid of trivial v1 header wrappers
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The rbd code has a need to be able to restart an osd request that
has already been started and completed once before. This currently
wouldn't work right because the osd client code assumes an osd
request will be started exactly once Certain fields in a request
are never cleared and this leads to trouble if you try to reuse it.
Specifically, the r_sent, r_got_reply, and r_completed fields are
never cleared. The r_sent field records the osd incarnation at the
time the request was sent to that osd. If that's non-zero, the
message won't get re-mapped to a target osd properly, and won't be
put on the unsafe requests list the first time it's sent as it
should. The r_got_reply field is used in handle_reply() to ensure
the reply to a request is processed only once. And the r_completed
field is used for lingering requests to avoid calling the callback
function every time the osd client re-sends the request on behalf of
its initiator.
Each osd request passes through ceph_osdc_start_request() when
responsibility for the request is handed over to the osd client for
completion. We can safely zero these three fields there each time a
request gets started.
One last related change--clear the r_linger flag when a request
is no longer registered as a linger request.
This resolves:
http://tracker.ceph.com/issues/5026
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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Pull networking fixes from David Miller:
"Several small bug fixes all over:
1) be2net driver uses wrong payload length when submitting MAC list
get requests to the chip. From Sathya Perla.
2) Fix mwifiex memory leak on driver unload, from Amitkumar Karwar.
3) Prevent random memory access in batman-adv, from Marek Lindner.
4) batman-adv doesn't check for pskb_trim_rcsum() errors, also from
Marek Lindner.
5) Fix fec crashes on rapid link up/down, from Frank Li.
6) Fix inner protocol grovelling in GSO, from Pravin B Shelar.
7) Link event validation fix in qlcnic from Rajesh Borundia.
8) Not all FEC chips can support checksum offload, fix from Shawn
Guo.
9) EXPORT_SYMBOL + inline doesn't make any sense, from Denis Efremov.
10) Fix race in passthru mode during device removal in macvlan, from
Jiri Pirko.
11) Fix RCU hash table lookup socket state race in ipv6, leading to
NULL pointer derefs, from Eric Dumazet.
12) Add several missing HAS_DMA kconfig dependencies, from Geert
Uyttterhoeven.
13) Fix bogus PCI resource management in 3c59x driver, from Sergei
Shtylyov.
14) Fix info leak in ipv6 GRE tunnel driver, from Amerigo Wang.
15) Fix device leak in ipv6 IPSEC policy layer, from Cong Wang.
16) DMA mapping leak fix in qlge from Thadeu Lima de Souza Cascardo.
17) Missing iounmap on probe failure in bna driver, from Wei Yongjun."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (40 commits)
bna: add missing iounmap() on error in bnad_init()
qlge: fix dma map leak when the last chunk is not allocated
xfrm6: release dev before returning error
ipv6,gre: do not leak info to user-space
virtio_net: use default napi weight by default
emac: Fix EMAC soft reset on 460EX/GT
3c59x: fix PCI resource management
caif: CAIF_VIRTIO should depend on HAS_DMA
net/ethernet: MACB should depend on HAS_DMA
net/ethernet: ARM_AT91_ETHER should depend on HAS_DMA
net/wireless: ATH9K should depend on HAS_DMA
net/ethernet: STMMAC_ETH should depend on HAS_DMA
net/ethernet: NET_CALXEDA_XGMAC should depend on HAS_DMA
ipv6: do not clear pinet6 field
macvlan: fix passthru mode race between dev removal and rx path
ipv4: ip_output: remove inline marking of EXPORT_SYMBOL functions
net/mlx4: Strengthen VLAN tags/priorities enforcement in VST mode
net/mlx4_core: Add missing report on VST and spoof-checking dev caps
net: fec: enable hardware checksum only on imx6q-fec
qlcnic: Fix validation of link event command.
...
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We forget to call dev_put() on error path in xfrm6_fill_dst(),
its caller doesn't handle this.
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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There is a hole in struct ip6_tnl_parm2, so we have to
zero the struct on stack before copying it to user-space.
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We have seen multiple NULL dereferences in __inet6_lookup_established()
After analysis, I found that inet6_sk() could be NULL while the
check for sk_family == AF_INET6 was true.
Bug was added in linux-2.6.29 when RCU lookups were introduced in UDP
and TCP stacks.
Once an IPv6 socket, using SLAB_DESTROY_BY_RCU is inserted in a hash
table, we no longer can clear pinet6 field.
This patch extends logic used in commit fcbdf09d9652c891
("net: fix nulls list corruptions in sk_prot_alloc")
TCP/UDP/UDPLite IPv6 protocols provide their own .clear_sk() method
to make sure we do not clear pinet6 field.
At socket clone phase, we do not really care, as cloning the parent (non
NULL) pinet6 is not adding a fatal race.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Included changes:
- fix parsing of user typed protocol string to avoid random memory access in
some cases
- check pskb_trim_rcsum() return value
- prevent DAT from sending ARP replies when not needed
- reorder the main clean up routine to prevent race conditions
Signed-off-by: David S. Miller <davem@davemloft.net>
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nc_worker accesses the originator table during its periodic
work, but since the originator table is freed before
stopping the worker this leads to a global protection fault.
Fix this by killing the worker (in nc_free) before freeing
the originator table.
Moreover tidy up the entire clean up routine by running all
the subcomponents freeing procedures first and then killing
the TT and the originator tables at the end.
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
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In the outgoing ARP request snooping routine in DAT, ARP
Request sent by local clients which are supposed to be
replied by other local clients can be silently dropped.
The destination host will reply by itself through the LAN
and therefore there is no need to involve DAT.
Reported-by: Carlos Quijano <carlos@crqgestion.es>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Tested-by: Carlos Quijano <carlos@crqgestion.es>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
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Reported-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Acked-by: Martin Hundebøll <martin@hundeboll.net>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
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batadv_param_set_ra() strips the trailing '\n' from the supplied
string buffer without checking the length of the buffer first. This
patches avoids random memory access and associated potential
crashes.
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
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EXPORT_SYMBOL and inline directives are contradictory to each other.
The patch fixes this inconsistency.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Denis Efremov <yefremov.denis@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull audit changes from Eric Paris:
"Al used to send pull requests every couple of years but he told me to
just start pushing them to you directly.
Our touching outside of core audit code is pretty straight forward. A
couple of interface changes which hit net/. A simple argument bug
calling audit functions in namei.c and the removal of some assembly
branch prediction code on ppc"
* git://git.infradead.org/users/eparis/audit: (31 commits)
audit: fix message spacing printing auid
Revert "audit: move kaudit thread start from auditd registration to kaudit init"
audit: vfs: fix audit_inode call in O_CREAT case of do_last
audit: Make testing for a valid loginuid explicit.
audit: fix event coverage of AUDIT_ANOM_LINK
audit: use spin_lock in audit_receive_msg to process tty logging
audit: do not needlessly take a lock in tty_audit_exit
audit: do not needlessly take a spinlock in copy_signal
audit: add an option to control logging of passwords with pam_tty_audit
audit: use spin_lock_irqsave/restore in audit tty code
helper for some session id stuff
audit: use a consistent audit helper to log lsm information
audit: push loginuid and sessionid processing down
audit: stop pushing loginid, uid, sessionid as arguments
audit: remove the old depricated kernel interface
audit: make validity checking generic
audit: allow checking the type of audit message in the user filter
audit: fix build break when AUDIT_DEBUG == 2
audit: remove duplicate export of audit_enabled
Audit: do not print error when LSMs disabled
...
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parameters by itself
__audit_socketcall is an extern function.
better to check its parameters by itself.
also can return error code, when fail (find invalid parameters).
also use macro instead of real hard code number
also give related comments for it.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
[eparis: fix the return value when !CONFIG_AUDIT]
Signed-off-by: Eric Paris <eparis@redhat.com>
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Pull nfsd fixes from Bruce Fields:
"Small fixes for two bugs and two warnings"
* 'for-3.10' of git://linux-nfs.org/~bfields/linux:
nfsd: fix oops when legacy_recdir_name_error is passed a -ENOENT error
SUNRPC: fix decoding of optional gss-proxy xdr fields
SUNRPC: Refactor gssx_dec_option_array() to kill uninitialized warning
nfsd4: don't allow owner override on 4.1 CLAIM_FH opens
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The current code works, but sort of by accident: it obviously didn't
intend the error return to be interpreted as "true".
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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net/sunrpc/auth_gss/gss_rpc_xdr.c: In function ‘gssx_dec_option_array’:
net/sunrpc/auth_gss/gss_rpc_xdr.c:258: warning: ‘creds’ may be used uninitialized in this function
Return early if count is zero, to make it clearer to the compiler (and the
casual reviewer) that no more processing is done.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Pull more NFS client bugfixes from Trond Myklebust:
- Ensure that we match the 'sec=' mount flavour against the server list
- Fix the NFSv4 byte range locking in the presence of delegations
- Ensure that we conform to the NFSv4.1 spec w.r.t. freeing lock
stateids
- Fix a pNFS data server connection race
* tag 'nfs-for-3.10-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFS4.1 Fix data server connection race
NFSv3: match sec= flavor against server list
NFSv4.1: Ensure that we free the lock stateid on the server
NFSv4: Convert nfs41_free_stateid to use an asynchronous RPC call
SUNRPC: Don't spam syslog with "Pseudoflavor not found" messages
NFSv4.x: Fix handling of partially delegated locks
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Just convert those messages to dprintk()s so that they can be used
when debugging.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Rather than having logic to calculate inner protocol in every
tunnel gso handler move it to gso code. This simplifies code.
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Cong Wang <amwang@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull networking fixes from David Miller:
"Just a small pile of fixes"
1) Fix race conditions in IP fragmentation LRU list handling, from
Konstantin Khlebnikov.
2) vfree() is no longer verboten in interrupts, so deferring is
pointless, from Al Viro.
3) Conversion from mutex to semaphore in netpoll left trylock test
inverted, caught by Dan Carpenter.
4) 3c59x uses wrong base address when releasing regions, from Sergei
Shtylyov.
5) Bounds checking in TIPC from Dan Carpenter.
6) Fastopen cookies should not be expired as aggressively as other TCP
metrics. From Eric Dumazet.
7) Fix retrieval of MAC address in ibmveth, from Ben Herrenschmidt.
8) Don't use "u16" in virtio user headers, from Stephen Hemminger
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
tipc: potential divide by zero in tipc_link_recv_fragment()
tipc: add a bounds check in link_recv_changeover_msg()
net/usb: new driver for RTL8152
3c59x: fix freeing nonexistent resource on driver unload
netpoll: inverted down_trylock() test
rps_dev_flow_table_release(): no need to delay vfree()
fib_trie: no need to delay vfree()
net: frag, fix race conditions in LRU list maintenance
tcp: do not expire TCP fastopen cookies
net/eth/ibmveth: Fixup retrieval of MAC address
virtio: don't expose u16 in userspace api
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The worry here is that fragm_sz could be zero since it comes from
skb->data.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The bearer_id here comes from skb->data and it can be a number from 0 to
7. The problem is that the ->links[] array has only 2 elements so I
have added a range check.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The return value is reversed from mutex_trylock().
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The same story as with fib_trie patch - vfree() from RCU callbacks
is legitimate now.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now that vfree() can be called from interrupt contexts, there's no
need to play games with schedule_work() to escape calling vfree()
from RCU callbacks.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch fixes race between inet_frag_lru_move() and inet_frag_lru_add()
which was introduced in commit 3ef0eb0db4bf92c6d2510fe5c4dc51852746f206
("net: frag, move LRU list maintenance outside of rwlock")
One cpu already added new fragment queue into hash but not into LRU.
Other cpu found it in hash and tries to move it to the end of LRU.
This leads to NULL pointer dereference inside of list_move_tail().
Another possible race condition is between inet_frag_lru_move() and
inet_frag_lru_del(): move can happens after deletion.
This patch initializes LRU list head before adding fragment into hash and
inet_frag_lru_move() doesn't touches it if it's empty.
I saw this kernel oops two times in a couple of days.
[119482.128853] BUG: unable to handle kernel NULL pointer dereference at (null)
[119482.132693] IP: [<ffffffff812ede89>] __list_del_entry+0x29/0xd0
[119482.136456] PGD 2148f6067 PUD 215ab9067 PMD 0
[119482.140221] Oops: 0000 [#1] SMP
[119482.144008] Modules linked in: vfat msdos fat 8021q fuse nfsd auth_rpcgss nfs_acl nfs lockd sunrpc ppp_async ppp_generic bridge slhc stp llc w83627ehf hwmon_vid snd_hda_codec_hdmi snd_hda_codec_realtek kvm_amd k10temp kvm snd_hda_intel snd_hda_codec edac_core radeon snd_hwdep ath9k snd_pcm ath9k_common snd_page_alloc ath9k_hw snd_timer snd soundcore drm_kms_helper ath ttm r8169 mii
[119482.152692] CPU 3
[119482.152721] Pid: 20, comm: ksoftirqd/3 Not tainted 3.9.0-zurg-00001-g9f95269 #132 To Be Filled By O.E.M. To Be Filled By O.E.M./RS880D
[119482.161478] RIP: 0010:[<ffffffff812ede89>] [<ffffffff812ede89>] __list_del_entry+0x29/0xd0
[119482.166004] RSP: 0018:ffff880216d5db58 EFLAGS: 00010207
[119482.170568] RAX: 0000000000000000 RBX: ffff88020882b9c0 RCX: dead000000200200
[119482.175189] RDX: 0000000000000000 RSI: 0000000000000880 RDI: ffff88020882ba00
[119482.179860] RBP: ffff880216d5db58 R08: ffffffff8155c7f0 R09: 0000000000000014
[119482.184570] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88020882ba00
[119482.189337] R13: ffffffff81c8d780 R14: ffff880204357f00 R15: 00000000000005a0
[119482.194140] FS: 00007f58124dc700(0000) GS:ffff88021fcc0000(0000) knlGS:0000000000000000
[119482.198928] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[119482.203711] CR2: 0000000000000000 CR3: 00000002155f0000 CR4: 00000000000007e0
[119482.208533] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[119482.213371] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[119482.218221] Process ksoftirqd/3 (pid: 20, threadinfo ffff880216d5c000, task ffff880216d3a9a0)
[119482.223113] Stack:
[119482.228004] ffff880216d5dbd8 ffffffff8155dcda 0000000000000000 ffff000200000001
[119482.233038] ffff8802153c1f00 ffff880000289440 ffff880200000014 ffff88007bc72000
[119482.238083] 00000000000079d5 ffff88007bc72f44 ffffffff00000002 ffff880204357f00
[119482.243090] Call Trace:
[119482.248009] [<ffffffff8155dcda>] ip_defrag+0x8fa/0xd10
[119482.252921] [<ffffffff815a8013>] ipv4_conntrack_defrag+0x83/0xe0
[119482.257803] [<ffffffff8154485b>] nf_iterate+0x8b/0xa0
[119482.262658] [<ffffffff8155c7f0>] ? inet_del_offload+0x40/0x40
[119482.267527] [<ffffffff815448e4>] nf_hook_slow+0x74/0x130
[119482.272412] [<ffffffff8155c7f0>] ? inet_del_offload+0x40/0x40
[119482.277302] [<ffffffff8155d068>] ip_rcv+0x268/0x320
[119482.282147] [<ffffffff81519992>] __netif_receive_skb_core+0x612/0x7e0
[119482.286998] [<ffffffff81519b78>] __netif_receive_skb+0x18/0x60
[119482.291826] [<ffffffff8151a650>] process_backlog+0xa0/0x160
[119482.296648] [<ffffffff81519f29>] net_rx_action+0x139/0x220
[119482.301403] [<ffffffff81053707>] __do_softirq+0xe7/0x220
[119482.306103] [<ffffffff81053868>] run_ksoftirqd+0x28/0x40
[119482.310809] [<ffffffff81074f5f>] smpboot_thread_fn+0xff/0x1a0
[119482.315515] [<ffffffff81074e60>] ? lg_local_lock_cpu+0x40/0x40
[119482.320219] [<ffffffff8106d870>] kthread+0xc0/0xd0
[119482.324858] [<ffffffff8106d7b0>] ? insert_kthread_work+0x40/0x40
[119482.329460] [<ffffffff816c32dc>] ret_from_fork+0x7c/0xb0
[119482.334057] [<ffffffff8106d7b0>] ? insert_kthread_work+0x40/0x40
[119482.338661] Code: 00 00 55 48 8b 17 48 b9 00 01 10 00 00 00 ad de 48 8b 47 08 48 89 e5 48 39 ca 74 29 48 b9 00 02 20 00 00 00 ad de 48 39 c8 74 7a <4c> 8b 00 4c 39 c7 75 53 4c 8b 42 08 4c 39 c7 75 2b 48 89 42 08
[119482.343787] RIP [<ffffffff812ede89>] __list_del_entry+0x29/0xd0
[119482.348675] RSP <ffff880216d5db58>
[119482.353493] CR2: 0000000000000000
Oops happened on this path:
ip_defrag() -> ip_frag_queue() -> inet_frag_lru_move() -> list_move_tail() -> __list_del_entry()
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Florian Westphal <fw@strlen.de>
Cc: Eric Dumazet <edumazet@google.com>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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TCP metric cache expires entries after one hour.
This probably make sense for TCP RTT/RTTVAR/CWND, but not
for TCP fastopen cookies.
Its better to try previous cookie. If it appears to be obsolete,
server will send us new cookie anyway.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph changes from Alex Elder:
"This is a big pull.
Most of it is culmination of Alex's work to implement RBD image
layering, which is now complete (yay!).
There is also some work from Yan to fix i_mutex behavior surrounding
writes in cephfs, a sync write fix, a fix for RBD images that get
resized while they are mapped, and a few patches from me that resolve
annoying auth warnings and fix several bugs in the ceph auth code."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (254 commits)
rbd: fix image request leak on parent read
libceph: use slab cache for osd client requests
libceph: allocate ceph message data with a slab allocator
libceph: allocate ceph messages with a slab allocator
rbd: allocate image object names with a slab allocator
rbd: allocate object requests with a slab allocator
rbd: allocate name separate from obj_request
rbd: allocate image requests with a slab allocator
rbd: use binary search for snapshot lookup
rbd: clear EXISTS flag if mapped snapshot disappears
rbd: kill off the snapshot list
rbd: define rbd_snap_size() and rbd_snap_features()
rbd: use snap_id not index to look up snap info
rbd: look up snapshot name in names buffer
rbd: drop obj_request->version
rbd: drop rbd_obj_method_sync() version parameter
rbd: more version parameter removal
rbd: get rid of some version parameters
rbd: stop tracking header object version
rbd: snap names are pointer to constant data
...
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Create a slab cache to manage allocation of ceph_osdc_request
structures.
This resolves:
http://tracker.ceph.com/issues/3926
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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Create a slab cache to manage ceph_msg_data structure allocation.
This is part of:
http://tracker.ceph.com/issues/3926
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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Create a slab cache to manage ceph_msg structure allocation.
This is part of:
http://tracker.ceph.com/issues/3926
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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This creates a new source file "net/ceph/snapshot.c" to contain
utility routines related to ceph snapshot contexts. The main
motivation was to define ceph_create_snap_context() as a common way
to create these structures, but I've moved the definitions of
ceph_get_snap_context() and ceph_put_snap_context() there too.
(The benefit of inlining those is very small, and I'd rather
keep this collection of functions together.)
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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A WATCH op includes an object version. The version that's supplied
is incorrectly byte-swapped osd_req_op_watch_init() where it's first
assigned (it's been this way since that code was first added).
The result is that the version sent to the osd is wrong, because
that value gets byte-swapped again in osd_req_encode_op(). This
is the source of a sparse warning related to improper byte order in
the assignment.
The approach of using the version to avoid a race is deprecated
(see http://tracker.ceph.com/issues/3871), and the watch parameter
is no longer even examined by the osd. So fix the assignment in
osd_req_op_watch_init() so it no longer does the byte swap.
This resolves:
http://tracker.ceph.com/issues/3847
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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Add the ability to provide an array of pages as outbound request
data for object class method calls.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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This patch makes four small changes in the ceph messenger.
While getting copyup functionality working I found two bugs in the
messenger. Existing paths through the code did not trigger these
problems, but they're fixed here:
- In ceph_msg_data_pagelist_cursor_init(), the cursor's
last_piece field was being checked against the length
supplied. This was OK until this commit: ccba6d98 libceph:
implement multiple data items in a message That commit changed
the cursor init routines to allow lengths to be supplied that
exceeded the size of the current data item. Because of this,
we have to use the assigned cursor resid field rather than the
provided length in determining whether the cursor points to
the last piece of a data item.
- In ceph_msg_data_add_pages(), a BUG_ON() was erroneously
catching attempts to add page data to a message if the message
already had data assigned to it. That was OK until that same
commit, at which point it was fine for messages to have
multiple data items. It slipped through because that BUG_ON()
call was present twice in that function. (You can never be too
careful.)
In addition two other minor things are changed:
- In ceph_msg_data_cursor_init(), the local variable "data" was
getting assigned twice.
- In ceph_msg_data_advance(), it was assumed that the
type-specific advance routine would set new_piece to true
after it advanced past the last piece. That may have been
fine, but since we check for that case we might as well set it
explicitly in ceph_msg_data_advance().
This resolves:
http://tracker.ceph.com/issues/4762
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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Allow osd request ops that aren't otherwise structured (not class,
extent, or watch ops) to specify "raw" data to be used to hold
incoming data for the op. Make use of this capability for the osd
STAT op.
Prefix the name of the private function osd_req_op_init() with "_",
and expose a new function by that (earlier) name whose purpose is to
initialize osd ops with (only) implied data.
For now we'll just support the use of a page array for an osd op
with incoming raw data.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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There are a bunch of functions defined to encapsulate getting the
address of a data field for a particular op in an osd request.
They're all defined the same way, so create a macro to take the
place of all of them.
Two of these are used outside the osd client code, so preserve them
(but convert them to use the new macro internally). Stop exporting
the ones that aren't used elsewhere.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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In the incremental move toward supporting distinct data items in an
osd request some of the functions had "write_request" parameters to
indicate, basically, whether the data belonged to in_data or the
out_data. Now that we maintain the data fields in the op structure
there is no need to indicate the direction, so get rid of the
"write_request" parameters.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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An osd request currently has two callbacks. They inform the
initiator of the request when we've received confirmation for the
target osd that a request was received, and when the osd indicates
all changes described by the request are durable.
The only time the second callback is used is in the ceph file system
for a synchronous write. There's a race that makes some handling of
this case unsafe. This patch addresses this problem. The error
handling for this callback is also kind of gross, and this patch
changes that as well.
In ceph_sync_write(), if a safe callback is requested we want to add
the request on the ceph inode's unsafe items list. Because items on
this list must have their tid set (by ceph_osd_start_request()), the
request added *after* the call to that function returns. The
problem with this is that there's a race between starting the
request and adding it to the unsafe items list; the request may
already be complete before ceph_sync_write() even begins to put it
on the list.
To address this, we change the way the "safe" callback is used.
Rather than just calling it when the request is "safe", we use it to
notify the initiator the bounds (start and end) of the period during
which the request is *unsafe*. So the initiator gets notified just
before the request gets sent to the osd (when it is "unsafe"), and
again when it's known the results are durable (it's no longer
unsafe). The first call will get made in __send_request(), just
before the request message gets sent to the messenger for the first
time. That function is only called by __send_queued(), which is
always called with the osd client's request mutex held.
We then have this callback function insert the request on the ceph
inode's unsafe list when we're told the request is unsafe. This
will avoid the race because this call will be made under protection
of the osd client's request mutex. It also nicely groups the setup
and cleanup of the state associated with managing unsafe requests.
The name of the "safe" callback field is changed to "unsafe" to
better reflect its new purpose. It has a Boolean "unsafe" parameter
to indicate whether the request is becoming unsafe or is now safe.
Because the "msg" parameter wasn't used, we drop that.
This resolves the original problem reportedin:
http://tracker.ceph.com/issues/4706
Reported-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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Right now the data for a method call is specified via a pointer and
length, and it's copied--along with the class and method name--into
a pagelist data item to be sent to the osd. Instead, encode the
data in a data item separate from the class and method names.
This will allow large amounts of data to be supplied to methods
without copying. Only rbd uses the class functionality right now,
and when it really needs this it will probably need to use a page
array rather than a page list. But this simple implementation
demonstrates the functionality on the osd client, and that's enough
for now.
This resolves:
http://tracker.ceph.com/issues/4104
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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Change the names of the functions that put data on a pagelist to
reflect that we're adding to whatever's already there rather than
just setting it to the one thing. Currently only one data item is
ever added to a message, but that's about to change.
This resolves:
http://tracker.ceph.com/issues/2770
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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This patch adds support to the messenger for more than one data item
in its data list.
A message data cursor has two more fields to support this:
- a count of the number of bytes left to be consumed across
all data items in the list, "total_resid"
- a pointer to the head of the list (for validation only)
The cursor initialization routine has been split into two parts: the
outer one, which initializes the cursor for traversing the entire
list of data items; and the inner one, which initializes the cursor
to start processing a single data item.
When a message cursor is first initialized, the outer initialization
routine sets total_resid to the length provided. The data pointer
is initialized to the first data item on the list. From there, the
inner initialization routine finishes by setting up to process the
data item the cursor points to.
Advancing the cursor consumes bytes in total_resid. If the resid
field reaches zero, it means the current data item is fully
consumed. If total_resid indicates there is more data, the cursor
is advanced to point to the next data item, and then the inner
initialization routine prepares for using that. (A check is made at
this point to make sure we don't wrap around the front of the list.)
The type-specific init routines are modified so they can be given a
length that's larger than what the data item can support. The resid
field is initialized to the smaller of the provided length and the
length of the entire data item.
When total_resid reaches zero, we're done.
This resolves:
http://tracker.ceph.com/issues/3761
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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In place of the message data pointer, use a list head which links
through message data items. For now we only support a single entry
on that list.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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Rather than having a ceph message data item point to the cursor it's
associated with, have the cursor point to a data item. This will
allow a message cursor to be used for more than one data item.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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A message will only be processing a single data item at a time, so
there's no need for each data item to have its own cursor.
Move the cursor embedded in the message data structure into the
message itself. To minimize the impact, keep the data->cursor
field, but make it be a pointer to the cursor in the message.
Move the definition of ceph_msg_data above ceph_msg_data_cursor so
the cursor can point to the data without a forward definition rather
than vice-versa.
This and the upcoming patches are part of:
http://tracker.ceph.com/issues/3761
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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The bio is the only data item type that doesn't record its full
length. Fix that.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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We know the length of our message buffers. If we get a message
that's too long, just dump it and ignore it. If skip was set
then con->in_msg won't be valid, so be careful not to dereference
a null pointer in the process.
This resolves:
http://tracker.ceph.com/issues/4664
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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This patch:
15a0d7b libceph: record message data length
did not enclose some bio-specific code inside CONFIG_BLOCK as
it should have. Fix that.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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Finally! Convert the osd op data pointers into real structures, and
make the switch over to using them instead of having all ops share
the in and/or out data structures in the osd request.
Set up a new function to traverse the set of ops and release any
data associated with them (pages).
This and the patches leading up to it resolve:
http://tracker.ceph.com/issues/4657
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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