/* * Copyright (C) 2012 Alexander Block. All rights reserved. * Copyright (C) 2012 STRATO. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License v2 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., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #include "ctree.h" #define BTRFS_SEND_STREAM_MAGIC "btrfs-stream" #define BTRFS_SEND_STREAM_VERSION 1 #define BTRFS_SEND_BUF_SIZE SZ_64K #define BTRFS_SEND_READ_SIZE (48 * SZ_1K) enum btrfs_tlv_type { BTRFS_TLV_U8, BTRFS_TLV_U16, BTRFS_TLV_U32, BTRFS_TLV_U64, BTRFS_TLV_BINARY, BTRFS_TLV_STRING, BTRFS_TLV_UUID, BTRFS_TLV_TIMESPEC, }; struct btrfs_stream_header { char magic[sizeof(BTRFS_SEND_STREAM_MAGIC)]; __le32 version; } __attribute__ ((__packed__)); struct btrfs_cmd_header { /* len excluding the header */ __le32 len; __le16 cmd; /* crc including the header with zero crc field */ __le32 crc; } __attribute__ ((__packed__)); struct btrfs_tlv_header { __le16 tlv_type; /* len excluding the header */ __le16 tlv_len; } __attribute__ ((__packed__)); /* commands */ enum btrfs_send_cmd { BTRFS_SEND_C_UNSPEC, BTRFS_SEND_C_SUBVOL, BTRFS_SEND_C_SNAPSHOT, BTRFS_SEND_C_MKFILE, BTRFS_SEND_C_MKDIR, BTRFS_SEND_C_MKNOD, BTRFS_SEND_C_MKFIFO, BTRFS_SEND_C_MKSOCK, BTRFS_SEND_C_SYMLINK, BTRFS_SEND_C_RENAME, BTRFS_SEND_C_LINK, BTRFS_SEND_C_UNLINK, BTRFS_SEND_C_RMDIR, BTRFS_SEND_C_SET_XATTR, BTRFS_SEND_C_REMOVE_XATTR, BTRFS_SEND_C_WRITE, BTRFS_SEND_C_CLONE, BTRFS_SEND_C_TRUNCATE, BTRFS_SEND_C_CHMOD, BTRFS_SEND_C_CHOWN, BTRFS_SEND_C_UTIMES, BTRFS_SEND_C_END, BTRFS_SEND_C_UPDATE_EXTENT, __BTRFS_SEND_C_MAX, }; #define BTRFS_SEND_C_MAX (__BTRFS_SEND_C_MAX - 1) /* attributes in send stream */ enum { BTRFS_SEND_A_UNSPEC, BTRFS_SEND_A_UUID, BTRFS_SEND_A_CTRANSID, BTRFS_SEND_A_INO, BTRFS_SEND_A_SIZE, BTRFS_SEND_A_MODE, BTRFS_SEND_A_UID, BTRFS_SEND_A_GID, BTRFS_SEND_A_RDEV, BTRFS_SEND_A_CTIME, BTRFS_SEND_A_MTIME, BTRFS_SEND_A_ATIME, BTRFS_SEND_A_OTIME, BTRFS_SEND_A_XATTR_NAME, BTRFS_SEND_A_XATTR_DATA, BTRFS_SEND_A_PATH, BTRFS_SEND_A_PATH_TO, BTRFS_SEND_A_PATH_LINK, BTRFS_SEND_A_FILE_OFFSET, BTRFS_SEND_A_DATA, BTRFS_SEND_A_CLONE_UUID, BTRFS_SEND_A_CLONE_CTRANSID, BTRFS_SEND_A_CLONE_PATH, BTRFS_SEND_A_CLONE_OFFSET, BTRFS_SEND_A_CLONE_LEN, __BTRFS_SEND_A_MAX, }; #define BTRFS_SEND_A_MAX (__BTRFS_SEND_A_MAX - 1) #ifdef __KERNEL__ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg); #endif ate-remove&id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>root/net/nfc/hci/command.c
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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-30 19:27:10 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-31 09:13:49 -0500
commit79c6f448c8b79c321e4a1f31f98194e4f6b6cae7 (patch)
tree370efda701f03cccf21e02bb1fdd3b852547d75c /net/nfc/hci/command.c
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'net/nfc/hci/command.c')