The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
dev_get_by_index – find a device by its ifindex Synopsis struct net_device *dev_get_by_index(struct net *net, int ifindex); Arguments net the applicable net namespace ifindex index of device Description Search for an interface by index. Returns NULL if the device is not found or a pointer to the device. The device returned has had a reference added…
dev_forward_skb – loopback an skb to another netif Synopsis int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); Arguments dev destination network device skb buffer to forward Description return values: NET_RX_SUCCESS (no congestion) NET_RX_DROP (packet was dropped, but freed) dev_forward_skb can be used for injecting an skb from the start_xmit function of one device into the receive…
dev_fill_metadata_dst – Retrieve tunnel egress information. Synopsis int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb); Arguments dev targeted interface skb The packet. Description For better visibility of tunnel traffic OVS needs to retrieve egress tunnel information for a packet. Following API allows user to get this info. Copyright
dev_disable_lro – disable Large Receive Offload on a device Synopsis void dev_disable_lro(struct net_device *dev); Arguments dev device Description Disable Large Receive Offload (LRO) on a net device. Must be called under RTNL. This is needed if received packets may be forwarded to another interface. Copyright
dev_close – shutdown an interface. Synopsis int dev_close(struct net_device *dev); Arguments dev device to shutdown Description This function moves an active device into down state. A NETDEV_GOING_DOWN is sent to the netdev notifier chain. The device is then deactivated and finally a NETDEV_DOWN is sent to the notifier chain. Copyright
dev_change_xdp_fd – set or clear a bpf program for a device rx path Synopsis int dev_change_xdp_fd(struct net_device *dev, int fd); Arguments dev device fd new program fd or negative value to clear Description Set or clear a bpf program for a device Copyright
dev_change_proto_down – update protocol port state information Synopsis int dev_change_proto_down(struct net_device *dev, bool proto_down); Arguments dev device proto_down new value Description This info can be used by switch drivers to set the phys state of the port. Copyright
dev_change_net_namespace – move device to different nethost namespace Synopsis int dev_change_net_namespace(struct net_device *dev, struct net *net, const char *pat); Arguments dev device net network namespace pat If not NULL name pattern to try if the current device name is already taken in the destination network namespace. Description This function shuts down a device interface and…
dev_change_flags – change device settings Synopsis int dev_change_flags(struct net_device *dev, unsigned int flags); Arguments dev device flags device state flags Description Change settings on device based state flags. The flags are in the userspace exported format. Copyright
dev_change_carrier – Change device carrier Synopsis int dev_change_carrier(struct net_device *dev, bool new_carrier); Arguments dev device new_carrier new value Description Change device carrier Copyright
dev_alloc_name – allocate a name for a device Synopsis int dev_alloc_name(struct net_device *dev, const char *name); Arguments dev device name name format string Description Passed a format string – eg “ltd” it will try and find a suitable id. It scans list of devices to build up a free map, then chooses the first empty…
dev_add_pack – add packet handler Synopsis void dev_add_pack(struct packet_type *pt); Arguments pt packet type declaration Description Add a protocol handler to the networking stack. The passed packet_type is linked into kernel lists and may not be freed until it has been removed from the kernel lists. This call does not sleep therefore it can not…
dev_add_offload – register offload handlers Synopsis void dev_add_offload(struct packet_offload *po); Arguments po protocol offload declaration Description Add protocol offload handlers to the networking stack. The passed proto_offload is linked into kernel lists and may not be freed until it has been removed from the kernel lists. This call does not sleep therefore it can not…
dentry_update_name_case – update case insensitive dentry with a new name Synopsis void dentry_update_name_case(struct dentry *dentry, const struct qstr *name); Arguments dentry dentry to be updated name new name Description Update a case insensitive dentry with new case of name. dentry must have been returned by d_lookup with name name. Old and new name lengths must…
delete_from_page_cache – delete page from page cache Synopsis void delete_from_page_cache(struct page *page); Arguments page the page which the kernel is trying to remove from page cache Description This must be called only on pages that have been verified to be in the page cache and locked. It will never put the page into the free…
decode_rs8 – Decode codeword (8bit data width) Synopsis int decode_rs8(struct rs_control *rs, uint8_t *data, uint16_t *par, int len, uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk, uint16_t *corr); Arguments rs the rs control structure data data field of a given type par received parity data field len data length s syndrome data field (if NULL,…
decode_rs16 – Decode codeword (16bit data width) Synopsis int decode_rs16(struct rs_control *rs, uint16_t *data, uint16_t *par, int len, uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk, uint16_t *corr); Arguments rs the rs control structure data data field of a given type par received parity data field len data length s syndrome data field (if NULL,…
debugfs_use_file_start – mark the beginning of file data access Synopsis int debugfs_use_file_start(const struct dentry *dentry, int *srcu_idx); Arguments dentry the dentry object whose data is being accessed. srcu_idx a pointer to some memory to store a SRCU index in. Description Up to a matching call to debugfs_use_file_finish, any successive call into the file removing functions…
debugfs_use_file_finish – mark the end of file data access Synopsis void debugfs_use_file_finish(int srcu_idx); Arguments srcu_idx the SRCU index “created” by a former call to debugfs_use_file_start. Description Allow any ongoing concurrent call into debugfs_remove or debugfs_remove_recursive blocked by a former call to debugfs_use_file_start to proceed and return to its caller. Copyright
debugfs_rename – rename a file/directory in the debugfs filesystem Synopsis struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry, struct dentry *new_dir, const char *new_name); Arguments old_dir a pointer to the parent dentry for the renamed object. This should be a directory dentry. old_dentry dentry of an object to be renamed. new_dir a pointer to the…