/* * include/net/devlink.h - Network physical device Netlink interface * Copyright (c) 2016 Mellanox Technologies. All rights reserved. * Copyright (c) 2016 Jiri Pirko * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #ifndef _NET_DEVLINK_H_ #define _NET_DEVLINK_H_ #include #include #include #include #include #include #include struct devlink_ops; struct devlink { struct list_head list; struct list_head port_list; struct list_head sb_list; const struct devlink_ops *ops; struct device *dev; possible_net_t _net; char priv[0] __aligned(NETDEV_ALIGN); }; struct devlink_port { struct list_head list; struct devlink *devlink; unsigned index; bool registered; enum devlink_port_type type; enum devlink_port_type desired_type; void *type_dev; bool split; u32 split_group; }; struct devlink_sb_pool_info { enum devlink_sb_pool_type pool_type; u32 size; enum devlink_sb_threshold_type threshold_type; }; struct devlink_ops { int (*port_type_set)(struct devlink_port *devlink_port, enum devlink_port_type port_type); int (*port_split)(struct devlink *devlink, unsigned int port_index, unsigned int count); int (*port_unsplit)(struct devlink *devlink, unsigned int port_index); int (*sb_pool_get)(struct devlink *devlink, unsigned int sb_index, u16 pool_index, struct devlink_sb_pool_info *pool_info); int (*sb_pool_set)(struct devlink *devlink, unsigned int sb_index, u16 pool_index, u32 size, enum devlink_sb_threshold_type threshold_type); int (*sb_port_pool_get)(struct devlink_port *devlink_port, unsigned int sb_index, u16 pool_index, u32 *p_threshold); int (*sb_port_pool_set)(struct devlink_port *devlink_port, unsigned int sb_index, u16 pool_index, u32 threshold); int (*sb_tc_pool_bind_get)(struct devlink_port *devlink_port, unsigned int sb_index, u16 tc_index, enum devlink_sb_pool_type pool_type, u16 *p_pool_index, u32 *p_threshold); int (*sb_tc_pool_bind_set)(struct devlink_port *devlink_port, unsigned int sb_index, u16 tc_index, enum devlink_sb_pool_type pool_type, u16 pool_index, u32 threshold); int (*sb_occ_snapshot)(struct devlink *devlink, unsigned int sb_index); int (*sb_occ_max_clear)(struct devlink *devlink, unsigned int sb_index); int (*sb_occ_port_pool_get)(struct devlink_port *devlink_port, unsigned int sb_index, u16 pool_index, u32 *p_cur, u32 *p_max); int (*sb_occ_tc_port_bind_get)(struct devlink_port *devlink_port, unsigned int sb_index, u16 tc_index, enum devlink_sb_pool_type pool_type, u32 *p_cur, u32 *p_max); int (*eswitch_mode_get)(struct devlink *devlink, u16 *p_mode); int (*eswitch_mode_set)(struct devlink *devlink, u16 mode); int (*eswitch_inline_mode_get)(struct devlink *devlink, u8 *p_inline_mode); int (*eswitch_inline_mode_set)(struct devlink *devlink, u8 inline_mode); }; static inline void *devlink_priv(struct devlink *devlink) { BUG_ON(!devlink); return &devlink->priv; } static inline struct devlink *priv_to_devlink(void *priv) { BUG_ON(!priv); return container_of(priv, struct devlink, priv); } struct ib_device; #if IS_ENABLED(CONFIG_NET_DEVLINK) struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size); int devlink_register(struct devlink *devlink, struct device *dev); void devlink_unregister(struct devlink *devlink); void devlink_free(struct devlink *devlink); int devlink_port_register(struct devlink *devlink, struct devlink_port *devlink_port, unsigned int port_index); void devlink_port_unregister(struct devlink_port *devlink_port); void devlink_port_type_eth_set(struct devlink_port *devlink_port, struct net_device *netdev); void devlink_port_type_ib_set(struct devlink_port *devlink_port, struct ib_device *ibdev); void devlink_port_type_clear(struct devlink_port *devlink_port); void devlink_port_split_set(struct devlink_port *devlink_port, u32 split_group); int devlink_sb_register(struct devlink *devlink, unsigned int sb_index, u32 size, u16 ingress_pools_count, u16 egress_pools_count, u16 ingress_tc_count, u16 egress_tc_count); void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index); #else static inline struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size) { return kzalloc(sizeof(struct devlink) + priv_size, GFP_KERNEL); } static inline int devlink_register(struct devlink *devlink, struct device *dev) { return 0; } static inline void devlink_unregister(struct devlink *devlink) { } static inline void devlink_free(struct devlink *devlink) { kfree(devlink); } static inline int devlink_port_register(struct devlink *devlink, struct devlink_port *devlink_port, unsigned int port_index) { return 0; } static inline void devlink_port_unregister(struct devlink_port *devlink_port) { } static inline void devlink_port_type_eth_set(struct devlink_port *devlink_port, struct net_device *netdev) { } static inline void devlink_port_type_ib_set(struct devlink_port *devlink_port, struct ib_device *ibdev) { } static inline void devlink_port_type_clear(struct devlink_port *devlink_port) { } static inline void devlink_port_split_set(struct devlink_port *devlink_port, u32 split_group) { } static inline int devlink_sb_register(struct devlink *devlink, unsigned int sb_index, u32 size, u16 ingress_pools_count, u16 egress_pools_count, u16 ingress_tc_count, u16 egress_tc_count) { return 0; } static inline void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index) { } #endif #endif /* _NET_DEVLINK_H_ */ to finish. But, there's a small race where btrfs_sync_log can remove itself from the list if it finds a log commit is already done. Also, it uses list_del_init() to remove itself from the list, but there's no way to know if btrfs_remove_all_log_ctxs has already run, so we don't know for sure if it is safe to call list_del_init(). This gets rid of all the shortcuts for btrfs_remove_all_log_ctxs(), and just calls it with the proper locking. This is part two of the corruption fixed by cbd60aa7cd1. I should have done this in the first place, but convinced myself the optimizations were safe. A 12 hour run of dbench 2048 will eventually trigger a list debug WARN_ON for the list_del_init() in btrfs_sync_log(). Fixes: d1433debe7f4346cf9fc0dafc71c3137d2a97bc4 Reported-by: Dave Jones <davej@codemonkey.org.uk> cc: stable@vger.kernel.org # 3.15+ Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'Documentation/virtual/kvm')