kernel/linux.git/net/9p/trans_common.c, branch v7.1

9p: fix file headers

2021-11-03T08:45:04+00:00

- add missing SPDX-License-Identifier - remove (sometimes incorrect) file name from file header Link: http://lkml.kernel.org/r/20211102134608.1588018-2-dominique.martinet@atmark-techno.com Signed-off-by: Dominique Martinet

net: 9p: Fix kerneldoc warnings of missing parameters etc

2020-11-02T20:25:52+00:00

net/9p/client.c:420: warning: Function parameter or member 'c' not described in 'p9_client_cb' net/9p/client.c:420: warning: Function parameter or member 'req' not described in 'p9_client_cb' net/9p/client.c:420: warning: Function parameter or member 'status' not described in 'p9_client_cb' net/9p/client.c:568: warning: Function parameter or member 'uidata' not described in 'p9_check_zc_errors' net/9p/trans_common.c:23: warning: Function parameter or member 'nr_pages' not described in 'p9_release_pages' net/9p/trans_common.c:23: warning: Function parameter or member 'pages' not described in 'p9_release_pages' net/9p/trans_fd.c:132: warning: Function parameter or member 'rreq' not described in 'p9_conn' net/9p/trans_fd.c:132: warning: Function parameter or member 'wreq' not described in 'p9_conn' net/9p/trans_fd.c:56: warning: Function parameter or member 'privport' not described in 'p9_fd_opts' net/9p/trans_rdma.c:113: warning: Function parameter or member 'cqe' not described in 'p9_rdma_context' net/9p/trans_rdma.c:129: warning: Function parameter or member 'privport' not described in 'p9_rdma_opts' net/9p/trans_virtio.c:215: warning: Function parameter or member 'limit' not described in 'pack_sg_list_p' net/9p/trans_virtio.c:83: warning: Function parameter or member 'chan_list' not described in 'virtio_chan' net/9p/trans_virtio.c:83: warning: Function parameter or member 'p9_max_pages' not described in 'virtio_chan' net/9p/trans_virtio.c:83: warning: Function parameter or member 'ring_bufs_avail' not described in 'virtio_chan' net/9p/trans_virtio.c:83: warning: Function parameter or member 'tag' not described in 'virtio_chan' net/9p/trans_virtio.c:83: warning: Function parameter or member 'vc_wq' not described in 'virtio_chan' Signed-off-by: Andrew Lunn Acked-by: Dominique Martinet Link: https://lore.kernel.org/r/20201031182655.1082065-1-andrew@lunn.ch Signed-off-by: Jakub Kicinski

net/9p: include trans_common.h to fix missing prototype warning.

2018-11-20T06:04:16+00:00

This silences -Wmissing-prototypes when defining p9_release_pages. Link: http://lkml.kernel.org/r/b1c4df8f21689b10d451c28fe38e860722d20e71.1542089696.git.dato@net.com.org.es Signed-off-by: Adeodato Simó Signed-off-by: Dominique Martinet

net/9p: correct some comment errors in 9p file system code

2018-05-10T12:21:53+00:00

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

net/9p: remove (now-)unused helpers

2015-04-12T02:28:29+00:00

Signed-off-by: Al Viro

9p: fix off by one causing access violations and memory corruption

2013-07-11T18:36:02+00:00

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 <48> 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

fs/9p: Update zero-copy implementation in 9p

2011-10-24T16:13:11+00:00

* 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

net/9p: Handle get_user_pages_fast return properly

2011-05-10T03:51:12+00:00

Use proper data type to handle get_user_pages_fast error condition. Also do not treat EFAULT error as fatal. Signed-off-by: M. Mohan Kumar Signed-off-by: Venkateswararao Jujjuri Signed-off-by: Eric Van Hensbergen

9p: Fix sparse error

2011-04-15T20:26:14+00:00

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

Fix common misspellings

2011-03-31T14:26:23+00:00

Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi