Eric Lee / smarc-fsl-linux-kernel

20 Jul, 2020

2 commits

29 Oct, 2019

1 commit

05 Jun, 2019

1 commit

  • 2b27bdcc2   treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 336 ... Browse Code »

    Based on 1 normalized pattern(s):

    this program is free software you can redistribute it and or modify
    it under the terms of the gnu general public license version 2 as
    published by the free software foundation this program is
    distributed in the hope that it will be useful but without any
    warranty without even the implied warranty of merchantability or
    fitness for a particular purpose see the gnu general public license
    for more details you should have received a copy of the gnu general
    public license along with this program if not write to the free
    software foundation inc 51 franklin st fifth floor boston ma 02110
    1301 usa

    extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-only

    has been chosen to replace the boilerplate/reference in 246 file(s).

    Signed-off-by: Thomas Gleixner
    Reviewed-by: Alexios Zavras
    Reviewed-by: Allison Randal
    Cc: linux-spdx@vger.kernel.org
    Link: https://lkml.kernel.org/r/20190530000436.674189849@linutronix.de
    Signed-off-by: Greg Kroah-Hartman

    Thomas Gleixner
     

20 May, 2019

1 commit

29 Jun, 2018

1 commit

  • a11e1d432   Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL ... Browse Code »

    The poll() changes were not well thought out, and completely
    unexplained. They also caused a huge performance regression, because
    "->poll()" was no longer a trivial file operation that just called down
    to the underlying file operations, but instead did at least two indirect
    calls.

    Indirect calls are sadly slow now with the Spectre mitigation, but the
    performance problem could at least be largely mitigated by changing the
    "->get_poll_head()" operation to just have a per-file-descriptor pointer
    to the poll head instead. That gets rid of one of the new indirections.

    But that doesn't fix the new complexity that is completely unwarranted
    for the regular case. The (undocumented) reason for the poll() changes
    was some alleged AIO poll race fixing, but we don't make the common case
    slower and more complex for some uncommon special case, so this all
    really needs way more explanations and most likely a fundamental
    redesign.

    [ This revert is a revert of about 30 different commits, not reverted
    individually because that would just be unnecessarily messy - Linus ]

    Cc: Al Viro
    Cc: Christoph Hellwig
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

05 Jun, 2018

1 commit

  • 408afb8d7   Merge branch 'work.aio-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Browse Code »

    Pull aio updates from Al Viro:
    "Majority of AIO stuff this cycle. aio-fsync and aio-poll, mostly.

    The only thing I'm holding back for a day or so is Adam's aio ioprio -
    his last-minute fixup is trivial (missing stub in !CONFIG_BLOCK case),
    but let it sit in -next for decency sake..."

    * 'work.aio-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits)
    aio: sanitize the limit checking in io_submit(2)
    aio: fold do_io_submit() into callers
    aio: shift copyin of iocb into io_submit_one()
    aio_read_events_ring(): make a bit more readable
    aio: all callers of aio_{read,write,fsync,poll} treat 0 and -EIOCBQUEUED the same way
    aio: take list removal to (some) callers of aio_complete()
    aio: add missing break for the IOCB_CMD_FDSYNC case
    random: convert to ->poll_mask
    timerfd: convert to ->poll_mask
    eventfd: switch to ->poll_mask
    pipe: convert to ->poll_mask
    crypto: af_alg: convert to ->poll_mask
    net/rxrpc: convert to ->poll_mask
    net/iucv: convert to ->poll_mask
    net/phonet: convert to ->poll_mask
    net/nfc: convert to ->poll_mask
    net/caif: convert to ->poll_mask
    net/bluetooth: convert to ->poll_mask
    net/sctp: convert to ->poll_mask
    net/tipc: convert to ->poll_mask
    ...

    Linus Torvalds
     

26 May, 2018

2 commits

16 May, 2018

1 commit

  • c35063722   proc: introduce proc_create_net{,_data} ... Browse Code »

    Variants of proc_create{,_data} that directly take a struct seq_operations
    and deal with network namespaces in ->open and ->release. All callers of
    proc_create + seq_open_net converted over, and seq_{open,release}_net are
    removed entirely.

    Signed-off-by: Christoph Hellwig

    Christoph Hellwig
     

13 Feb, 2018

1 commit

  • 9b2c45d47   net: make getname() functions return length rather than use int* parameter ... Browse Code »

    Changes since v1:
    Added changes in these files:
    drivers/infiniband/hw/usnic/usnic_transport.c
    drivers/staging/lustre/lnet/lnet/lib-socket.c
    drivers/target/iscsi/iscsi_target_login.c
    drivers/vhost/net.c
    fs/dlm/lowcomms.c
    fs/ocfs2/cluster/tcp.c
    security/tomoyo/network.c

    Before:
    All these functions either return a negative error indicator,
    or store length of sockaddr into "int *socklen" parameter
    and return zero on success.

    "int *socklen" parameter is awkward. For example, if caller does not
    care, it still needs to provide on-stack storage for the value
    it does not need.

    None of the many FOO_getname() functions of various protocols
    ever used old value of *socklen. They always just overwrite it.

    This change drops this parameter, and makes all these functions, on success,
    return length of sockaddr. It's always >= 0 and can be differentiated
    from an error.

    Tests in callers are changed from "if (err)" to "if (err < 0)", where needed.

    rpc_sockname() lost "int buflen" parameter, since its only use was
    to be passed to kernel_getsockname() as &buflen and subsequently
    not used in any way.

    Userspace API is not changed.

    text data bss dec hex filename
    30108430 2633624 873672 33615726 200ef6e vmlinux.before.o
    30108109 2633612 873672 33615393 200ee21 vmlinux.o

    Signed-off-by: Denys Vlasenko
    CC: David S. Miller
    CC: linux-kernel@vger.kernel.org
    CC: netdev@vger.kernel.org
    CC: linux-bluetooth@vger.kernel.org
    CC: linux-decnet-user@lists.sourceforge.net
    CC: linux-wireless@vger.kernel.org
    CC: linux-rdma@vger.kernel.org
    CC: linux-sctp@vger.kernel.org
    CC: linux-nfs@vger.kernel.org
    CC: linux-x25@vger.kernel.org
    Signed-off-by: David S. Miller

    Denys Vlasenko
     

12 Feb, 2018

1 commit

  • a9a08845e   vfs: do bulk POLL* -> EPOLL* replacement ... Browse Code »

    This is the mindless scripted replacement of kernel use of POLL*
    variables as described by Al, done by this script:

    for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
    L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
    for f in $L; do sed -i "-es/^\([^\"]*\)\(\\)/\\1E\\2/" $f; done
    done

    with de-mangling cleanups yet to come.

    NOTE! On almost all architectures, the EPOLL* constants have the same
    values as the POLL* constants do. But they keyword here is "almost".
    For various bad reasons they aren't the same, and epoll() doesn't
    actually work quite correctly in some cases due to this on Sparc et al.

    The next patch from Al will sort out the final differences, and we
    should be all done.

    Scripted-by: Al Viro
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

01 Feb, 2018

1 commit

  • b2fe5fa68   Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next ... Browse Code »

    Pull networking updates from David Miller:

    1) Significantly shrink the core networking routing structures. Result
    of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf

    2) Add netdevsim driver for testing various offloads, from Jakub
    Kicinski.

    3) Support cross-chip FDB operations in DSA, from Vivien Didelot.

    4) Add a 2nd listener hash table for TCP, similar to what was done for
    UDP. From Martin KaFai Lau.

    5) Add eBPF based queue selection to tun, from Jason Wang.

    6) Lockless qdisc support, from John Fastabend.

    7) SCTP stream interleave support, from Xin Long.

    8) Smoother TCP receive autotuning, from Eric Dumazet.

    9) Lots of erspan tunneling enhancements, from William Tu.

    10) Add true function call support to BPF, from Alexei Starovoitov.

    11) Add explicit support for GRO HW offloading, from Michael Chan.

    12) Support extack generation in more netlink subsystems. From Alexander
    Aring, Quentin Monnet, and Jakub Kicinski.

    13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
    Russell King.

    14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.

    15) Many improvements and simplifications to the NFP driver bpf JIT,
    from Jakub Kicinski.

    16) Support for ipv6 non-equal cost multipath routing, from Ido
    Schimmel.

    17) Add resource abstration to devlink, from Arkadi Sharshevsky.

    18) Packet scheduler classifier shared filter block support, from Jiri
    Pirko.

    19) Avoid locking in act_csum, from Davide Caratti.

    20) devinet_ioctl() simplifications from Al viro.

    21) More TCP bpf improvements from Lawrence Brakmo.

    22) Add support for onlink ipv6 route flag, similar to ipv4, from David
    Ahern.

    * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
    tls: Add support for encryption using async offload accelerator
    ip6mr: fix stale iterator
    net/sched: kconfig: Remove blank help texts
    openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
    tcp_nv: fix potential integer overflow in tcpnv_acked
    r8169: fix RTL8168EP take too long to complete driver initialization.
    qmi_wwan: Add support for Quectel EP06
    rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
    ipmr: Fix ptrdiff_t print formatting
    ibmvnic: Wait for device response when changing MAC
    qlcnic: fix deadlock bug
    tcp: release sk_frag.page in tcp_disconnect
    ipv4: Get the address of interface correctly.
    net_sched: gen_estimator: fix lockdep splat
    net: macb: Handle HRESP error
    net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
    ipv6: addrconf: break critical section in addrconf_verify_rtnl()
    ipv6: change route cache aging logic
    i40e/i40evf: Update DESC_NEEDED value to reflect larger value
    bnxt_en: cleanup DIM work on device shutdown
    ...

    Linus Torvalds
     

17 Jan, 2018

1 commit

  • 96890d625   net: delete /proc THIS_MODULE references ... Browse Code »

    /proc has been ignoring struct file_operations::owner field for 10 years.
    Specifically, it started with commit 786d7e1612f0b0adb6046f19b906609e4fe8b1ba
    ("Fix rmmod/read/write races in /proc entries"). Notice the chunk where
    inode->i_fop is initialized with proxy struct file_operations for
    regular files:

    - if (de->proc_fops)
    - inode->i_fop = de->proc_fops;
    + if (de->proc_fops) {
    + if (S_ISREG(inode->i_mode))
    + inode->i_fop = &proc_reg_file_ops;
    + else
    + inode->i_fop = de->proc_fops;
    + }

    VFS stopped pinning module at this point.

    Signed-off-by: Alexey Dobriyan
    Signed-off-by: David S. Miller

    Alexey Dobriyan
     

28 Nov, 2017

1 commit

01 Jul, 2017

2 commits

  • 41c6d650f   net: convert sock.sk_refcnt from atomic_t to refcount_t ... Browse Code »

    refcount_t type and corresponding API should be
    used instead of atomic_t when the variable is used as
    a reference counter. This allows to avoid accidental
    refcounter overflows that might lead to use-after-free
    situations.

    This patch uses refcount_inc_not_zero() instead of
    atomic_inc_not_zero_hint() due to absense of a _hint()
    version of refcount API. If the hint() version must
    be used, we might need to revisit API.

    Signed-off-by: Elena Reshetova
    Signed-off-by: Hans Liljestrand
    Signed-off-by: Kees Cook
    Signed-off-by: David Windsor
    Signed-off-by: David S. Miller

    Reshetova, Elena
     
  • 14afee4b6   net: convert sock.sk_wmem_alloc from atomic_t to refcount_t ... Browse Code »

    refcount_t type and corresponding API should be
    used instead of atomic_t when the variable is used as
    a reference counter. This allows to avoid accidental
    refcounter overflows that might lead to use-after-free
    situations.

    Signed-off-by: Elena Reshetova
    Signed-off-by: Hans Liljestrand
    Signed-off-by: Kees Cook
    Signed-off-by: David Windsor
    Signed-off-by: David S. Miller

    Reshetova, Elena
     

10 Mar, 2017

1 commit

  • cdfbabfb2   net: Work around lockdep limitation in sockets that use sockets ... Browse Code »

    Lockdep issues a circular dependency warning when AFS issues an operation
    through AF_RXRPC from a context in which the VFS/VM holds the mmap_sem.

    The theory lockdep comes up with is as follows:

    (1) If the pagefault handler decides it needs to read pages from AFS, it
    calls AFS with mmap_sem held and AFS begins an AF_RXRPC call, but
    creating a call requires the socket lock:

    mmap_sem must be taken before sk_lock-AF_RXRPC

    (2) afs_open_socket() opens an AF_RXRPC socket and binds it. rxrpc_bind()
    binds the underlying UDP socket whilst holding its socket lock.
    inet_bind() takes its own socket lock:

    sk_lock-AF_RXRPC must be taken before sk_lock-AF_INET

    (3) Reading from a TCP socket into a userspace buffer might cause a fault
    and thus cause the kernel to take the mmap_sem, but the TCP socket is
    locked whilst doing this:

    sk_lock-AF_INET must be taken before mmap_sem

    However, lockdep's theory is wrong in this instance because it deals only
    with lock classes and not individual locks. The AF_INET lock in (2) isn't
    really equivalent to the AF_INET lock in (3) as the former deals with a
    socket entirely internal to the kernel that never sees userspace. This is
    a limitation in the design of lockdep.

    Fix the general case by:

    (1) Double up all the locking keys used in sockets so that one set are
    used if the socket is created by userspace and the other set is used
    if the socket is created by the kernel.

    (2) Store the kern parameter passed to sk_alloc() in a variable in the
    sock struct (sk_kern_sock). This informs sock_lock_init(),
    sock_init_data() and sk_clone_lock() as to the lock keys to be used.

    Note that the child created by sk_clone_lock() inherits the parent's
    kern setting.

    (3) Add a 'kern' parameter to ->accept() that is analogous to the one
    passed in to ->create() that distinguishes whether kernel_accept() or
    sys_accept4() was the caller and can be passed to sk_alloc().

    Note that a lot of accept functions merely dequeue an already
    allocated socket. I haven't touched these as the new socket already
    exists before we get the parameter.

    Note also that there are a couple of places where I've made the accepted
    socket unconditionally kernel-based:

    irda_accept()
    rds_rcp_accept_one()
    tcp_accept_from_sock()

    because they follow a sock_create_kern() and accept off of that.

    Whilst creating this, I noticed that lustre and ocfs don't create sockets
    through sock_create_kern() and thus they aren't marked as for-kernel,
    though they appear to be internal. I wonder if these should do that so
    that they use the new set of lock keys.

    Signed-off-by: David Howells
    Signed-off-by: David S. Miller

    David Howells
     

02 Mar, 2017

1 commit

11 Feb, 2016

1 commit

  • 086c653f5   sock: struct proto hash function may error ... Browse Code »

    In order to support fast reuseport lookups in TCP, the hash function
    defined in struct proto must be capable of returning an error code.
    This patch changes the function signature of all related hash functions
    to return an integer and handles or propagates this return value at
    all call sites.

    Signed-off-by: Craig Gallek
    Signed-off-by: David S. Miller

    Craig Gallek
     

03 Mar, 2015

1 commit

  • 1b7841404   net: Remove iocb argument from sendmsg and recvmsg ... Browse Code »

    After TIPC doesn't depend on iocb argument in its internal
    implementations of sendmsg() and recvmsg() hooks defined in proto
    structure, no any user is using iocb argument in them at all now.
    Then we can drop the redundant iocb argument completely from kinds of
    implementations of both sendmsg() and recvmsg() in the entire
    networking stack.

    Cc: Christoph Hellwig
    Suggested-by: Al Viro
    Signed-off-by: Ying Xue
    Signed-off-by: David S. Miller

    Ying Xue
     

15 Nov, 2013

1 commit

16 Aug, 2013

1 commit

28 Feb, 2013

1 commit

  • b67bfe0d4   hlist: drop the node parameter from iterators ... Browse Code »

    I'm not sure why, but the hlist for each entry iterators were conceived

    list_for_each_entry(pos, head, member)

    The hlist ones were greedy and wanted an extra parameter:

    hlist_for_each_entry(tpos, pos, head, member)

    Why did they need an extra pos parameter? I'm not quite sure. Not only
    they don't really need it, it also prevents the iterator from looking
    exactly like the list iterator, which is unfortunate.

    Besides the semantic patch, there was some manual work required:

    - Fix up the actual hlist iterators in linux/list.h
    - Fix up the declaration of other iterators based on the hlist ones.
    - A very small amount of places were using the 'node' parameter, this
    was modified to use 'obj->member' instead.
    - Coccinelle didn't handle the hlist_for_each_entry_safe iterator
    properly, so those had to be fixed up manually.

    The semantic patch which is mostly the work of Peter Senna Tschudin is here:

    @@
    iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host;

    type T;
    expression a,c,d,e;
    identifier b;
    statement S;
    @@

    -T b;

    [akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c]
    [akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c]
    [akpm@linux-foundation.org: checkpatch fixes]
    [akpm@linux-foundation.org: fix warnings]
    [akpm@linux-foudnation.org: redo intrusive kvm changes]
    Tested-by: Peter Senna Tschudin
    Acked-by: Paul E. McKenney
    Signed-off-by: Sasha Levin
    Cc: Wu Fengguang
    Cc: Marcelo Tosatti
    Cc: Gleb Natapov
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Sasha Levin
     

15 Aug, 2012

1 commit

18 Jun, 2012

1 commit

16 Apr, 2012

1 commit

13 Jan, 2012

1 commit

  • cf778b00e   net: reintroduce missing rcu_assign_pointer() calls ... Browse Code »

    commit a9b3cd7f32 (rcu: convert uses of rcu_assign_pointer(x, NULL) to
    RCU_INIT_POINTER) did a lot of incorrect changes, since it did a
    complete conversion of rcu_assign_pointer(x, y) to RCU_INIT_POINTER(x,
    y).

    We miss needed barriers, even on x86, when y is not NULL.

    Signed-off-by: Eric Dumazet
    CC: Stephen Hemminger
    CC: Paul E. McKenney
    Signed-off-by: David S. Miller

    Eric Dumazet
     

01 Nov, 2011

1 commit

02 Aug, 2011

1 commit

  • a9b3cd7f3   rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER ... Browse Code »

    When assigning a NULL value to an RCU protected pointer, no barrier
    is needed. The rcu_assign_pointer, used to handle that but will soon
    change to not handle the special case.

    Convert all rcu_assign_pointer of NULL value.

    //smpl
    @@ expression P; @@

    - rcu_assign_pointer(P, NULL)
    + RCU_INIT_POINTER(P, NULL)

    //

    Signed-off-by: Stephen Hemminger
    Acked-by: Paul E. McKenney
    Signed-off-by: David S. Miller

    Stephen Hemminger
     

24 May, 2011

1 commit

  • 71338aa7d   net: convert %p usage to %pK ... Browse Code »

    The %pK format specifier is designed to hide exposed kernel pointers,
    specifically via /proc interfaces. Exposing these pointers provides an
    easy target for kernel write vulnerabilities, since they reveal the
    locations of writable structures containing easily triggerable function
    pointers. The behavior of %pK depends on the kptr_restrict sysctl.

    If kptr_restrict is set to 0, no deviation from the standard %p behavior
    occurs. If kptr_restrict is set to 1, the default, if the current user
    (intended to be a reader via seq_printf(), etc.) does not have CAP_SYSLOG
    (currently in the LSM tree), kernel pointers using %pK are printed as 0's.
    If kptr_restrict is set to 2, kernel pointers using %pK are printed as
    0's regardless of privileges. Replacing with 0's was chosen over the
    default "(null)", which cannot be parsed by userland %p, which expects
    "(nil)".

    The supporting code for kptr_restrict and %pK are currently in the -mm
    tree. This patch converts users of %p in net/ to %pK. Cases of printing
    pointers to the syslog are not covered, since this would eliminate useful
    information for postmortem debugging and the reading of the syslog is
    already optionally protected by the dmesg_restrict sysctl.

    Signed-off-by: Dan Rosenberg
    Cc: James Morris
    Cc: Eric Dumazet
    Cc: Thomas Graf
    Cc: Eugene Teo
    Cc: Kees Cook
    Cc: Ingo Molnar
    Cc: David S. Miller
    Cc: Peter Zijlstra
    Cc: Eric Paris
    Signed-off-by: Andrew Morton
    Signed-off-by: David S. Miller

    Dan Rosenberg
     

15 Apr, 2011

1 commit

10 Mar, 2011

2 commits

26 Feb, 2011

2 commits

14 Oct, 2010

1 commit

  • b3d625538   Phonet: 'connect' socket implementation for Pipe controller ... Browse Code »

    Based on suggestion by Rémi Denis-Courmont to implement 'connect'
    for Pipe controller logic, this patch implements 'connect' socket
    call for the Pipe controller logic.
    The patch does following:-
    - Removes setsockopts for PNPIPE_CREATE and PNPIPE_DESTROY
    - Adds setsockopt for setting the Pipe handle value
    - Implements connect socket call
    - Updates the Pipe controller logic

    User-space should now follow below sequence with Pipe controller:-
    -socket
    -bind
    -setsockopt for PNPIPE_PIPE_HANDLE
    -connect
    -setsockopt for PNPIPE_ENCAP_IP
    -setsockopt for PNPIPE_ENABLE

    GPRS/3G data has been tested working fine with this.

    Signed-off-by: Kumar Sanghvi
    Acked-by: Rémi Denis-Courmont
    Signed-off-by: David S. Miller

    Kumar Sanghvi
     

16 Sep, 2010

3 commits