Eric Lee / smarc-fsl-linux-kernel

20 Nov, 2018

1 commit

10 May, 2018

1 commit

  • 4a026da91   net/9p: correct some comment errors in 9p file system code ... Browse Code »

    There are follow comment errors:
    1 The function name is wrong in p9_release_pages() comment.
    2 The function name and variable name is wrong in p9_poll_workfn() comment.
    3 There is no variable dm_mr and lkey in struct p9_trans_rdma.
    4 The function name is wrong in rdma_create_trans() comment.
    5 There is no variable initialized in struct virtio_chan.
    6 The variable name is wrong in p9_virtio_zc_request() comment.

    Signed-off-by: Sun Lianwen
    Reviewed-by: Randy Dunlap
    Reviewed-by: Randy Dunlap
    Signed-off-by: David S. Miller

    Sun Lianwen
     

12 Apr, 2015

1 commit

12 Jul, 2013

1 commit

  • 110ecd69a   9p: fix off by one causing access violations and memory corruption ... Browse Code »

    p9_release_pages() would attempt to dereference one value past the end of
    pages[]. This would cause the following crashes:

    [ 6293.171817] BUG: unable to handle kernel paging request at ffff8807c96f3000
    [ 6293.174146] IP: [] p9_release_pages+0x3b/0x60
    [ 6293.176447] PGD 79c5067 PUD 82c1e3067 PMD 82c197067 PTE 80000007c96f3060
    [ 6293.180060] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
    [ 6293.180060] Modules linked in:
    [ 6293.180060] CPU: 62 PID: 174043 Comm: modprobe Tainted: G W 3.10.0-next-20130710-sasha #3954
    [ 6293.180060] task: ffff8807b803b000 ti: ffff880787dde000 task.ti: ffff880787dde000
    [ 6293.180060] RIP: 0010:[] [] p9_release_pages+0x3b/0x60
    [ 6293.214316] RSP: 0000:ffff880787ddfc28 EFLAGS: 00010202
    [ 6293.214316] RAX: 0000000000000001 RBX: ffff8807c96f2ff8 RCX: 0000000000000000
    [ 6293.222017] RDX: ffff8807b803b000 RSI: 0000000000000001 RDI: ffffea001c7e3d40
    [ 6293.222017] RBP: ffff880787ddfc48 R08: 0000000000000000 R09: 0000000000000000
    [ 6293.222017] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
    [ 6293.222017] R13: 0000000000000001 R14: ffff8807cc50c070 R15: ffff8807cc50c070
    [ 6293.222017] FS: 00007f572641d700(0000) GS:ffff8807f3600000(0000) knlGS:0000000000000000
    [ 6293.256784] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    [ 6293.256784] CR2: ffff8807c96f3000 CR3: 00000007c8e81000 CR4: 00000000000006e0
    [ 6293.256784] Stack:
    [ 6293.256784] ffff880787ddfcc8 ffff880787ddfcc8 0000000000000000 ffff880787ddfcc8
    [ 6293.256784] ffff880787ddfd48 ffffffff84128be8 ffff880700000002 0000000000000001
    [ 6293.256784] ffff8807b803b000 ffff880787ddfce0 0000100000000000 0000000000000000
    [ 6293.256784] Call Trace:
    [ 6293.256784] [] p9_virtio_zc_request+0x598/0x630
    [ 6293.256784] [] ? wake_up_bit+0x40/0x40
    [ 6293.256784] [] p9_client_zc_rpc+0x111/0x3a0
    [ 6293.256784] [] ? sched_clock_cpu+0x108/0x120
    [ 6293.256784] [] p9_client_read+0xe1/0x2c0
    [ 6293.256784] [] v9fs_file_read+0x90/0xc0
    [ 6293.256784] [] vfs_read+0xc3/0x130
    [ 6293.256784] [] ? trace_hardirqs_on+0xd/0x10
    [ 6293.256784] [] SyS_read+0x62/0xa0
    [ 6293.256784] [] tracesys+0xdd/0xe2
    [ 6293.256784] Code: 66 90 48 89 fb 41 89 f5 48 8b 3f 48 85 ff 74 29 85 f6 74 25 45 31 e4 66 0f 1f 84 00 00 00 00 00 e8 eb 14 12 fd 41 ff c4 49 63 c4 8b 3c c3 48 85 ff 74 05 45 39 e5 75 e7 48 83 c4 08 5b 41 5c
    [ 6293.256784] RIP [] p9_release_pages+0x3b/0x60
    [ 6293.256784] RSP
    [ 6293.256784] CR2: ffff8807c96f3000
    [ 6293.256784] ---[ end trace 50822ee72cd360fc ]---

    Signed-off-by: Sasha Levin
    Signed-off-by: David S. Miller

    Sasha Levin
     

25 Oct, 2011

1 commit

  • abfa034e4   fs/9p: Update zero-copy implementation in 9p ... Browse Code »

    * remove lot of update to different data structure
    * add a seperate callback for zero copy request.
    * above makes non zero copy code path simpler
    * remove conditionalizing TREAD/TREADDIR/TWRITE in the zero copy path
    * Fix the dotu p9_check_errors with zero copy. Add sufficient doc around
    * Add support for both in and output buffers in zero copy callback
    * pin and unpin pages in the same context
    * use helpers instead of defining page offset and rest of page ourself
    * Fix mem leak in p9_check_errors
    * Remove 'E' and 'F' in p9pdu_vwritef

    Signed-off-by: Aneesh Kumar K.V
    Signed-off-by: Eric Van Hensbergen

    Aneesh Kumar K.V
     

10 May, 2011

1 commit

16 Apr, 2011

1 commit

31 Mar, 2011

1 commit

23 Mar, 2011

1 commit

15 Mar, 2011

1 commit

  • 022cae365   [net/9p] Preparation and helper functions for zero copy ... Browse Code »

    This patch prepares p9_fcall structure for zero copy. Added
    fields send the payload buffer information to the transport layer.
    In addition it adds a 'private' field for the transport layer to
    store mapped/pinned page information so that it can be freed/unpinned
    during req_done.

    This patch also creates trans_common.[ch] to house helper functions.
    It adds the following helper functions.

    p9_release_req_pages - Release pages after the transaction.
    p9_nr_pages - Return number of pages needed to accomodate the payload.
    payload_gup - Translates user buffer into kernel pages.

    Signed-off-by: Venkateswararao Jujjuri
    Signed-off-by: Eric Van Hensbergen

    Venkateswararao Jujjuri (JV)