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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-01 10:39:57 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-01 10:39:57 -0700 |
commit | 694752922b12bd318aa80191bd9d8c3dcfb39055 (patch) | |
tree | 5afe83fd99100bea546dd5a1c1f778c58f41e5c0 /net | |
parent | a351e9b9fc24e982ec2f0e76379a49826036da12 (diff) | |
parent | 9438b3e080beccf6022138ea62192d55cc7dc4ed (diff) | |
download | lwn-694752922b12bd318aa80191bd9d8c3dcfb39055.tar.gz lwn-694752922b12bd318aa80191bd9d8c3dcfb39055.zip |
Merge branch 'for-4.12/block' of git://git.kernel.dk/linux-block
Pull block layer updates from Jens Axboe:
- Add BFQ IO scheduler under the new blk-mq scheduling framework. BFQ
was initially a fork of CFQ, but subsequently changed to implement
fairness based on B-WF2Q+, a modified variant of WF2Q. BFQ is meant
to be used on desktop type single drives, providing good fairness.
From Paolo.
- Add Kyber IO scheduler. This is a full multiqueue aware scheduler,
using a scalable token based algorithm that throttles IO based on
live completion IO stats, similary to blk-wbt. From Omar.
- A series from Jan, moving users to separately allocated backing
devices. This continues the work of separating backing device life
times, solving various problems with hot removal.
- A series of updates for lightnvm, mostly from Javier. Includes a
'pblk' target that exposes an open channel SSD as a physical block
device.
- A series of fixes and improvements for nbd from Josef.
- A series from Omar, removing queue sharing between devices on mostly
legacy drivers. This helps us clean up other bits, if we know that a
queue only has a single device backing. This has been overdue for
more than a decade.
- Fixes for the blk-stats, and improvements to unify the stats and user
windows. This both improves blk-wbt, and enables other users to
register a need to receive IO stats for a device. From Omar.
- blk-throttle improvements from Shaohua. This provides a scalable
framework for implementing scalable priotization - particularly for
blk-mq, but applicable to any type of block device. The interface is
marked experimental for now.
- Bucketized IO stats for IO polling from Stephen Bates. This improves
efficiency of polled workloads in the presence of mixed block size
IO.
- A few fixes for opal, from Scott.
- A few pulls for NVMe, including a lot of fixes for NVMe-over-fabrics.
From a variety of folks, mostly Sagi and James Smart.
- A series from Bart, improving our exposed info and capabilities from
the blk-mq debugfs support.
- A series from Christoph, cleaning up how handle WRITE_ZEROES.
- A series from Christoph, cleaning up the block layer handling of how
we track errors in a request. On top of being a nice cleanup, it also
shrinks the size of struct request a bit.
- Removal of mg_disk and hd (sorry Linus) by Christoph. The former was
never used by platforms, and the latter has outlived it's usefulness.
- Various little bug fixes and cleanups from a wide variety of folks.
* 'for-4.12/block' of git://git.kernel.dk/linux-block: (329 commits)
block: hide badblocks attribute by default
blk-mq: unify hctx delay_work and run_work
block: add kblock_mod_delayed_work_on()
blk-mq: unify hctx delayed_run_work and run_work
nbd: fix use after free on module unload
MAINTAINERS: bfq: Add Paolo as maintainer for the BFQ I/O scheduler
blk-mq-sched: alloate reserved tags out of normal pool
mtip32xx: use runtime tag to initialize command header
scsi: Implement blk_mq_ops.show_rq()
blk-mq: Add blk_mq_ops.show_rq()
blk-mq: Show operation, cmd_flags and rq_flags names
blk-mq: Make blk_flags_show() callers append a newline character
blk-mq: Move the "state" debugfs attribute one level down
blk-mq: Unregister debugfs attributes earlier
blk-mq: Only unregister hctxs for which registration succeeded
blk-mq-debugfs: Rename functions for registering and unregistering the mq directory
blk-mq: Let blk_mq_debugfs_register() look up the queue name
blk-mq: Register <dev>/queue/mq after having registered <dev>/queue
ide-pm: always pass 0 error to ide_complete_rq in ide_do_devset
ide-pm: always pass 0 error to __blk_end_request_all
..
Diffstat (limited to 'net')
-rw-r--r-- | net/core/utils.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/net/core/utils.c b/net/core/utils.c index 6592d7bbed39..32c467cf52d6 100644 --- a/net/core/utils.c +++ b/net/core/utils.c @@ -26,9 +26,11 @@ #include <linux/percpu.h> #include <linux/init.h> #include <linux/ratelimit.h> +#include <linux/socket.h> #include <net/sock.h> #include <net/net_ratelimit.h> +#include <net/ipv6.h> #include <asm/byteorder.h> #include <linux/uaccess.h> @@ -300,6 +302,107 @@ out: } EXPORT_SYMBOL(in6_pton); +static int inet4_pton(const char *src, u16 port_num, + struct sockaddr_storage *addr) +{ + struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; + int srclen = strlen(src); + + if (srclen > INET_ADDRSTRLEN) + return -EINVAL; + + if (in4_pton(src, srclen, (u8 *)&addr4->sin_addr.s_addr, + '\n', NULL) == 0) + return -EINVAL; + + addr4->sin_family = AF_INET; + addr4->sin_port = htons(port_num); + + return 0; +} + +static int inet6_pton(struct net *net, const char *src, u16 port_num, + struct sockaddr_storage *addr) +{ + struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; + const char *scope_delim; + int srclen = strlen(src); + + if (srclen > INET6_ADDRSTRLEN) + return -EINVAL; + + if (in6_pton(src, srclen, (u8 *)&addr6->sin6_addr.s6_addr, + '%', &scope_delim) == 0) + return -EINVAL; + + if (ipv6_addr_type(&addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL && + src + srclen != scope_delim && *scope_delim == '%') { + struct net_device *dev; + char scope_id[16]; + size_t scope_len = min_t(size_t, sizeof(scope_id) - 1, + src + srclen - scope_delim - 1); + + memcpy(scope_id, scope_delim + 1, scope_len); + scope_id[scope_len] = '\0'; + + dev = dev_get_by_name(net, scope_id); + if (dev) { + addr6->sin6_scope_id = dev->ifindex; + dev_put(dev); + } else if (kstrtouint(scope_id, 0, &addr6->sin6_scope_id)) { + return -EINVAL; + } + } + + addr6->sin6_family = AF_INET6; + addr6->sin6_port = htons(port_num); + + return 0; +} + +/** + * inet_pton_with_scope - convert an IPv4/IPv6 and port to socket address + * @net: net namespace (used for scope handling) + * @af: address family, AF_INET, AF_INET6 or AF_UNSPEC for either + * @src: the start of the address string + * @port: the start of the port string (or NULL for none) + * @addr: output socket address + * + * Return zero on success, return errno when any error occurs. + */ +int inet_pton_with_scope(struct net *net, __kernel_sa_family_t af, + const char *src, const char *port, struct sockaddr_storage *addr) +{ + u16 port_num; + int ret = -EINVAL; + + if (port) { + if (kstrtou16(port, 0, &port_num)) + return -EINVAL; + } else { + port_num = 0; + } + + switch (af) { + case AF_INET: + ret = inet4_pton(src, port_num, addr); + break; + case AF_INET6: + ret = inet6_pton(net, src, port_num, addr); + break; + case AF_UNSPEC: + ret = inet4_pton(src, port_num, addr); + if (ret) + ret = inet6_pton(net, src, port_num, addr); + break; + default: + pr_err("unexpected address family %d\n", af); + }; + + return ret; +} +EXPORT_SYMBOL(inet_pton_with_scope); + void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb, __be32 from, __be32 to, bool pseudohdr) { |