fc_host_post_event – called to post an even on an fc_host. Synopsis void fc_host_post_event(struct Scsi_Host *shost, u32 event_number, enum fc_host_event_code event_code, u32 event_data); Arguments shost host the event occurred on event_number fc event number obtained from get_fc_event_number event_code fc_host event being posted event_data 32bits of data for the event being posted Notes This routine assumes no…
fc_get_event_number – Obtain the next sequential FC event number Synopsis u32 fc_get_event_number(void); Arguments void no arguments Notes We could have inlined this, but it would have required fc_event_seq to be exposed. For now, live with the subroutine call. Atomic used to avoid lock/unlock… Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net>…
fc_block_scsi_eh – Block SCSI eh thread for blocked fc_rport Synopsis int fc_block_scsi_eh(struct scsi_cmnd *cmnd); Arguments cmnd SCSI command that scsi_eh is trying to recover Description This routine can be called from a FC LLD scsi_eh callback. It blocks the scsi_eh thread until the fc_rport leaves the FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is necessary to…
fault_in_user_writeable – Fault in user address and verify RW access Synopsis int fault_in_user_writeable(u32 __user *uaddr); Arguments uaddr pointer to faulting user space address Description Slow path to fixup the fault we just took in the atomic write access to uaddr. We have no generic implementation of a non-destructive write to the user address. We know…
eventfd_signal – Adds n to the eventfd counter. Synopsis __u64 eventfd_signal(struct eventfd_ctx * ctx, __u64 n); Arguments ctx [in] Pointer to the eventfd context. n [in] Value of the counter to be added to the eventfd internal counter. The value cannot be negative. Description This function is supposed to be called by the kernel in paths that do…
eventfd_fget – Acquire a reference of an eventfd file descriptor. Synopsis struct file *eventfd_fget(int fd); Arguments fd [in] Eventfd file descriptor. Description Returns a pointer to the eventfd file structure in case of success, or the following error pointer: -EBADF : Invalid fd file descriptor. -EINVAL : The fd file descriptor is not an eventfd…
eventfd_ctx_remove_wait_queue – Read the current counter and removes wait queue. Synopsis int eventfd_ctx_remove_wait_queue(struct eventfd_ctx *ctx, wait_queue_t *wait, __u64 *cnt); Arguments ctx [in] Pointer to eventfd context. wait [in] Wait queue to be removed. cnt [out] Pointer to the 64-bit counter value. Description Returns 0 if successful, or the following error codes: -EAGAIN : The operation…
eventfd_ctx_read – Reads the eventfd counter or wait if it is zero. Synopsis ssize_t eventfd_ctx_read(struct eventfd_ctx * ctx, int no_wait, __u64 * cnt); Arguments ctx [in] Pointer to eventfd context. no_wait [in] Different from zero if the operation should not block. cnt [out] Pointer to the 64-bit counter value. Description Returns 0 if successful, or the following error codes: -EAGAIN…
eventfd_ctx_put – Releases a reference to the internal eventfd context. Synopsis void eventfd_ctx_put(struct eventfd_ctx *ctx); Arguments ctx [in] Pointer to eventfd context. Description The eventfd context reference must have been previously acquired either with eventfd_ctx_get or eventfd_ctx_fdget. Copyright
eventfd_ctx_get – Acquires a reference to the internal eventfd context. Synopsis struct eventfd_ctx *eventfd_ctx_get(struct eventfd_ctx *ctx); Arguments ctx [in] Pointer to the eventfd context. Return In case of success, returns a pointer to the eventfd context. Copyright
eventfd_ctx_fileget – Acquires a reference to the internal eventfd context. Synopsis struct eventfd_ctx *eventfd_ctx_fileget(struct file *file); Arguments file [in] Eventfd file pointer. Description Returns a pointer to the internal eventfd context, otherwise the error pointer: -EINVAL : The fd file descriptor is not an eventfd file. Copyright
eventfd_ctx_fdget – Acquires a reference to the internal eventfd context. Synopsis struct eventfd_ctx *eventfd_ctx_fdget(int fd); Arguments fd [in] Eventfd file descriptor. Description Returns a pointer to the internal eventfd context, otherwise the error pointers returned by the following functions: eventfd_fget Copyright
ether_setup – setup Ethernet network device Synopsis void ether_setup(struct net_device *dev); Arguments dev network device Description Fill in the fields of the device structure with Ethernet-generic values. Copyright
ether_addr_equal_unaligned – Compare two not u16 aligned Ethernet addresses Synopsis bool ether_addr_equal_unaligned(const u8 * addr1, const u8 * addr2); Arguments addr1 Pointer to a six-byte array containing the Ethernet address addr2 Pointer other six-byte array containing the Ethernet address Description Compare two Ethernet addresses, returns true if equal Please note: Use only when any Ethernet address may not be…
ether_addr_equal_masked – Compare two Ethernet addresses with a mask Synopsis bool ether_addr_equal_masked(const u8 * addr1, const u8 * addr2, const u8 * mask); Arguments addr1 Pointer to a six-byte array containing the 1st Ethernet address addr2 Pointer to a six-byte array containing the 2nd Ethernet address mask Pointer to a six-byte array containing the Ethernet address bitmask Description Compare two Ethernet…
ether_addr_equal_64bits – Compare two Ethernet addresses Synopsis bool ether_addr_equal_64bits(const u8 addr1[6+2], const u8 addr2[6+2]); Arguments addr1[6+2] Pointer to an array of 8 bytes addr2[6+2] Pointer to an other array of 8 bytes Description Compare two Ethernet addresses, returns true if equal, false otherwise. The function doesn’t need any conditional branches and possibly uses word memory accesses on…
ether_addr_equal – Compare two Ethernet addresses Synopsis bool ether_addr_equal(const u8 * addr1, const u8 * addr2); Arguments addr1 Pointer to a six-byte array containing the Ethernet address addr2 Pointer other six-byte array containing the Ethernet address Description Compare two Ethernet addresses, returns true if equal Please note: addr1 & addr2 must both be aligned to u16. Copyright
ether_addr_copy – Copy an Ethernet address Synopsis void ether_addr_copy(u8 *dst, const u8 *src); Arguments dst Pointer to a six-byte array Ethernet address destination src Pointer to a six-byte array Ethernet address source Description Please note: dst & src must both be aligned to u16. Copyright
eth_zero_addr – Assign zero address Synopsis void eth_zero_addr(u8 *addr); Arguments addr Pointer to a six-byte array containing the Ethernet address Description Assign the zero address to the given address array. Copyright
eth_type_trans – determine the packet’s protocol ID. Synopsis __be16 eth_type_trans(struct sk_buff * skb, struct net_device * dev); Arguments skb received socket data dev receiving network device Description The rule here is that we assume 802.3 if the type field is short enough to be a length. This is normal practice and works for any ‘now in use’ protocol. Copyright