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for-4.21/block-20190102 

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Merge tag 'for-4.21/block-20190102' of git://git.kernel.dk/linux-block

Pull more block updates from Jens Axboe:

 - Dead code removal for loop/sunvdc (Chengguang)

 - Mark BIDI support for bsg as deprecated, logging a single dmesg
   warning if anyone is actually using it (Christoph)

 - blkcg cleanup, killing a dead function and making the tryget_closest
   variant easier to read (Dennis)

 - Floppy fixes, one fixing a regression in swim3 (Finn)

 - lightnvm use-after-free fix (Gustavo)

 - gdrom leak fix (Wenwen)

 - a set of drbd updates (Lars, Luc, Nathan, Roland)

* tag 'for-4.21/block-20190102' of git://git.kernel.dk/linux-block: (28 commits)
  block/swim3: Fix regression on PowerBook G3
  block/swim3: Fix -EBUSY error when re-opening device after unmount
  block/swim3: Remove dead return statement
  block/amiflop: Don't log error message on invalid ioctl
  gdrom: fix a memory leak bug
  lightnvm: pblk: fix use-after-free bug
  block: sunvdc: remove redundant code
  block: loop: remove redundant code
  bsg: deprecate BIDI support in bsg
  blkcg: remove unused __blkg_release_rcu()
  blkcg: clean up blkg_tryget_closest()
  drbd: Change drbd_request_detach_interruptible's return type to int
  drbd: Avoid Clang warning about pointless switch statment
  drbd: introduce P_ZEROES (REQ_OP_WRITE_ZEROES on the "wire")
  drbd: skip spurious timeout (ping-timeo) when failing promote
  drbd: don't retry connection if peers do not agree on "authentication" settings
  drbd: fix print_st_err()'s prototype to match the definition
  drbd: avoid spurious self-outdating with concurrent disconnect / down
  drbd: do not block when adjusting "disk-options" while IO is frozen
  drbd: fix comment typos
  ...
This commit is contained in:
Linus Torvalds 2019-01-02 18:49:58 -08:00
parent b79f9f93eb 427c5ce441
commit 77d0b194b2
23 changed files with 468 additions and 132 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
block/bio.c
View File

@ -2097,8 +2097,12 @@ EXPORT_SYMBOL_GPL(bio_associate_blkg);
*/
void bio_clone_blkg_association(struct bio *dst, struct bio *src)
{
rcu_read_lock();
if (src->bi_blkg)
__bio_associate_blkg(dst, src->bi_blkg);
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(bio_clone_blkg_association);
#endif /* CONFIG_BLK_CGROUP */

23
block/blk-cgroup.c
View File

@ -438,29 +438,6 @@ static void blkg_destroy_all(struct request_queue *q)
spin_unlock_irq(&q->queue_lock);
}
/*
* A group is RCU protected, but having an rcu lock does not mean that one
* can access all the fields of blkg and assume these are valid. For
* example, don't try to follow throtl_data and request queue links.
*
* Having a reference to blkg under an rcu allows accesses to only values
* local to groups like group stats and group rate limits.
*/
void __blkg_release_rcu(struct rcu_head *rcu_head)
{
struct blkcg_gq *blkg = container_of(rcu_head, struct blkcg_gq, rcu_head);
/* release the blkcg and parent blkg refs this blkg has been holding */
css_put(&blkg->blkcg->css);
if (blkg->parent)
blkg_put(blkg->parent);
wb_congested_put(blkg->wb_congested);
blkg_free(blkg);
}
EXPORT_SYMBOL_GPL(__blkg_release_rcu);
static int blkcg_reset_stats(struct cgroup_subsys_state *css,
struct cftype *cftype, u64 val)
{

4
block/bsg.c
View File

@ -177,6 +177,10 @@ bsg_map_hdr(struct request_queue *q, struct sg_io_v4 *hdr, fmode_t mode)
goto out;
}
pr_warn_once(
"BIDI support in bsg has been deprecated and might be removed. "
"Please report your use case to linux-scsi@vger.kernel.org\n");
next_rq = blk_get_request(q, REQ_OP_SCSI_IN, 0);
if (IS_ERR(next_rq)) {
ret = PTR_ERR(next_rq);

2
drivers/block/amiflop.c
View File

@ -1601,8 +1601,6 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
return p->type->read_size;
#endif
default:
printk(KERN_DEBUG "fd_ioctl: unknown cmd %d for drive %d.",
cmd, drive);
return -ENOSYS;
}
return 0;

2
drivers/block/drbd/drbd_debugfs.c
View File

@ -237,6 +237,8 @@ static void seq_print_peer_request_flags(struct seq_file *m, struct drbd_peer_re
seq_print_rq_state_bit(m, f & EE_CALL_AL_COMPLETE_IO, &sep, "in-AL");
seq_print_rq_state_bit(m, f & EE_SEND_WRITE_ACK, &sep, "C");
seq_print_rq_state_bit(m, f & EE_MAY_SET_IN_SYNC, &sep, "set-in-sync");
seq_print_rq_state_bit(m, f & EE_TRIM, &sep, "trim");
seq_print_rq_state_bit(m, f & EE_ZEROOUT, &sep, "zero-out");
seq_print_rq_state_bit(m, f & EE_WRITE_SAME, &sep, "write-same");
seq_putc(m, '\n');
}

19
drivers/block/drbd/drbd_int.h
View File

@ -430,7 +430,11 @@ enum {
__EE_MAY_SET_IN_SYNC,
/* is this a TRIM aka REQ_OP_DISCARD? */
__EE_IS_TRIM,
__EE_TRIM,
/* explicit zero-out requested, or
* our lower level cannot handle trim,
* and we want to fall back to zeroout instead */
__EE_ZEROOUT,
/* In case a barrier failed,
* we need to resubmit without the barrier flag. */
@ -472,7 +476,8 @@ enum {
};
#define EE_CALL_AL_COMPLETE_IO (1<<__EE_CALL_AL_COMPLETE_IO)
#define EE_MAY_SET_IN_SYNC (1<<__EE_MAY_SET_IN_SYNC)
#define EE_IS_TRIM (1<<__EE_IS_TRIM)
#define EE_TRIM (1<<__EE_TRIM)
#define EE_ZEROOUT (1<<__EE_ZEROOUT)
#define EE_RESUBMITTED (1<<__EE_RESUBMITTED)
#define EE_WAS_ERROR (1<<__EE_WAS_ERROR)
#define EE_HAS_DIGEST (1<<__EE_HAS_DIGEST)
@ -1556,6 +1561,8 @@ extern void start_resync_timer_fn(struct timer_list *t);
extern void drbd_endio_write_sec_final(struct drbd_peer_request *peer_req);
/* drbd_receiver.c */
extern int drbd_issue_discard_or_zero_out(struct drbd_device *device,
sector_t start, unsigned int nr_sectors, int flags);
extern int drbd_receiver(struct drbd_thread *thi);
extern int drbd_ack_receiver(struct drbd_thread *thi);
extern void drbd_send_ping_wf(struct work_struct *ws);
@ -1609,13 +1616,7 @@ static inline void drbd_tcp_quickack(struct socket *sock)
}
/* sets the number of 512 byte sectors of our virtual device */
static inline void drbd_set_my_capacity(struct drbd_device *device,
sector_t size)
{
/* set_capacity(device->this_bdev->bd_disk, size); */
set_capacity(device->vdisk, size);
device->this_bdev->bd_inode->i_size = (loff_t)size << 9;
}
void drbd_set_my_capacity(struct drbd_device *device, sector_t size);
/*
* used to submit our private bio

28
drivers/block/drbd/drbd_main.c
View File

@ -1668,7 +1668,11 @@ static u32 bio_flags_to_wire(struct drbd_connection *connection,
(bio->bi_opf & REQ_PREFLUSH ? DP_FLUSH : 0) |
(bio_op(bio) == REQ_OP_WRITE_SAME ? DP_WSAME : 0) |
(bio_op(bio) == REQ_OP_DISCARD ? DP_DISCARD : 0) |
(bio_op(bio) == REQ_OP_WRITE_ZEROES ? DP_DISCARD : 0);
(bio_op(bio) == REQ_OP_WRITE_ZEROES ?
((connection->agreed_features & DRBD_FF_WZEROES) ?
(DP_ZEROES |(!(bio->bi_opf & REQ_NOUNMAP) ? DP_DISCARD : 0))
: DP_DISCARD)
: 0);
else
return bio->bi_opf & REQ_SYNC ? DP_RW_SYNC : 0;
}
@ -1712,10 +1716,11 @@ int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request *
}
p->dp_flags = cpu_to_be32(dp_flags);
if (dp_flags & DP_DISCARD) {
if (dp_flags & (DP_DISCARD|DP_ZEROES)) {
enum drbd_packet cmd = (dp_flags & DP_ZEROES) ? P_ZEROES : P_TRIM;
struct p_trim *t = (struct p_trim*)p;
t->size = cpu_to_be32(req->i.size);
err = __send_command(peer_device->connection, device->vnr, sock, P_TRIM, sizeof(*t), NULL, 0);
err = __send_command(peer_device->connection, device->vnr, sock, cmd, sizeof(*t), NULL, 0);
goto out;
}
if (dp_flags & DP_WSAME) {
@ -2034,6 +2039,21 @@ void drbd_init_set_defaults(struct drbd_device *device)
device->local_max_bio_size = DRBD_MAX_BIO_SIZE_SAFE;
}
static void _drbd_set_my_capacity(struct drbd_device *device, sector_t size)
{
/* set_capacity(device->this_bdev->bd_disk, size); */
set_capacity(device->vdisk, size);
device->this_bdev->bd_inode->i_size = (loff_t)size << 9;
}
void drbd_set_my_capacity(struct drbd_device *device, sector_t size)
{
char ppb[10];
_drbd_set_my_capacity(device, size);
drbd_info(device, "size = %s (%llu KB)\n",
ppsize(ppb, size>>1), (unsigned long long)size>>1);
}
void drbd_device_cleanup(struct drbd_device *device)
{
int i;
@ -2059,7 +2079,7 @@ void drbd_device_cleanup(struct drbd_device *device)
}
D_ASSERT(device, first_peer_device(device)->connection->net_conf == NULL);
drbd_set_my_capacity(device, 0);
_drbd_set_my_capacity(device, 0);
if (device->bitmap) {
/* maybe never allocated. */
drbd_bm_resize(device, 0, 1);

133
drivers/block/drbd/drbd_nl.c
View File

@ -127,6 +127,35 @@ static int drbd_msg_put_info(struct sk_buff *skb, const char *info)
return 0;
}
__printf(2, 3)
static int drbd_msg_sprintf_info(struct sk_buff *skb, const char *fmt, ...)
{
va_list args;
struct nlattr *nla, *txt;
int err = -EMSGSIZE;
int len;
nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY);
if (!nla)
return err;
txt = nla_reserve(skb, T_info_text, 256);
if (!txt) {
nla_nest_cancel(skb, nla);
return err;
}
va_start(args, fmt);
len = vscnprintf(nla_data(txt), 256, fmt, args);
va_end(args);
/* maybe: retry with larger reserve, if truncated */
txt->nla_len = nla_attr_size(len+1);
nlmsg_trim(skb, (char*)txt + NLA_ALIGN(txt->nla_len));
nla_nest_end(skb, nla);
return 0;
}
/* This would be a good candidate for a "pre_doit" hook,
* and per-family private info->pointers.
* But we need to stay compatible with older kernels.
@ -668,14 +697,15 @@ drbd_set_role(struct drbd_device *const device, enum drbd_role new_role, int for
if (rv == SS_TWO_PRIMARIES) {
/* Maybe the peer is detected as dead very soon...
retry at most once more in this case. */
int timeo;
rcu_read_lock();
nc = rcu_dereference(connection->net_conf);
timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1;
rcu_read_unlock();
schedule_timeout_interruptible(timeo);
if (try < max_tries)
if (try < max_tries) {
int timeo;
try = max_tries - 1;
rcu_read_lock();
nc = rcu_dereference(connection->net_conf);
timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1;
rcu_read_unlock();
schedule_timeout_interruptible(timeo);
}
continue;
}
if (rv < SS_SUCCESS) {
@ -921,7 +951,6 @@ drbd_determine_dev_size(struct drbd_device *device, enum dds_flags flags, struct
} prev;
sector_t u_size, size;
struct drbd_md *md = &device->ldev->md;
char ppb[10];
void *buffer;
int md_moved, la_size_changed;
@ -999,8 +1028,6 @@ drbd_determine_dev_size(struct drbd_device *device, enum dds_flags flags, struct
/* racy, see comments above. */
drbd_set_my_capacity(device, size);
md->la_size_sect = size;
drbd_info(device, "size = %s (%llu KB)\n", ppsize(ppb, size>>1),
(unsigned long long)size>>1);
}
if (rv <= DS_ERROR)
goto err_out;
@ -1234,6 +1261,21 @@ static void fixup_discard_if_not_supported(struct request_queue *q)
}
}
static void fixup_write_zeroes(struct drbd_device *device, struct request_queue *q)
{
/* Fixup max_write_zeroes_sectors after blk_queue_stack_limits():
* if we can handle "zeroes" efficiently on the protocol,
* we want to do that, even if our backend does not announce
* max_write_zeroes_sectors itself. */
struct drbd_connection *connection = first_peer_device(device)->connection;
/* If the peer announces WZEROES support, use it. Otherwise, rather
* send explicit zeroes than rely on some discard-zeroes-data magic. */
if (connection->agreed_features & DRBD_FF_WZEROES)
q->limits.max_write_zeroes_sectors = DRBD_MAX_BBIO_SECTORS;
else
q->limits.max_write_zeroes_sectors = 0;
}
static void decide_on_write_same_support(struct drbd_device *device,
struct request_queue *q,
struct request_queue *b, struct o_qlim *o,
@ -1344,6 +1386,7 @@ static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backi
}
}
fixup_discard_if_not_supported(q);
fixup_write_zeroes(device, q);
}
void drbd_reconsider_queue_parameters(struct drbd_device *device, struct drbd_backing_dev *bdev, struct o_qlim *o)
@ -1514,6 +1557,30 @@ static void sanitize_disk_conf(struct drbd_device *device, struct disk_conf *dis
}
}
static int disk_opts_check_al_size(struct drbd_device *device, struct disk_conf *dc)
{
int err = -EBUSY;
if (device->act_log &&
device->act_log->nr_elements == dc->al_extents)
return 0;
drbd_suspend_io(device);
/* If IO completion is currently blocked, we would likely wait
* "forever" for the activity log to become unused. So we don't. */
if (atomic_read(&device->ap_bio_cnt))
goto out;
wait_event(device->al_wait, lc_try_lock(device->act_log));
drbd_al_shrink(device);
err = drbd_check_al_size(device, dc);
lc_unlock(device->act_log);
wake_up(&device->al_wait);
out:
drbd_resume_io(device);
return err;
}
int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
{
struct drbd_config_context adm_ctx;
@ -1576,15 +1643,12 @@ int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
}
}
drbd_suspend_io(device);
wait_event(device->al_wait, lc_try_lock(device->act_log));
drbd_al_shrink(device);
err = drbd_check_al_size(device, new_disk_conf);
lc_unlock(device->act_log);
wake_up(&device->al_wait);
drbd_resume_io(device);
err = disk_opts_check_al_size(device, new_disk_conf);
if (err) {
/* Could be just "busy". Ignore?
* Introduce dedicated error code? */
drbd_msg_put_info(adm_ctx.reply_skb,
"Try again without changing current al-extents setting");
retcode = ERR_NOMEM;
goto fail_unlock;
}
@ -1934,9 +1998,9 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
}
}
if (device->state.conn < C_CONNECTED &&
device->state.role == R_PRIMARY && device->ed_uuid &&
(device->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) {
if (device->state.pdsk != D_UP_TO_DATE && device->ed_uuid &&
(device->state.role == R_PRIMARY || device->state.peer == R_PRIMARY) &&
(device->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) {
drbd_err(device, "Can only attach to data with current UUID=%016llX\n",
(unsigned long long)device->ed_uuid);
retcode = ERR_DATA_NOT_CURRENT;
@ -1950,11 +2014,21 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
}
/* Prevent shrinking of consistent devices ! */
if (drbd_md_test_flag(nbc, MDF_CONSISTENT) &&
drbd_new_dev_size(device, nbc, nbc->disk_conf->disk_size, 0) < nbc->md.la_size_sect) {
drbd_warn(device, "refusing to truncate a consistent device\n");
retcode = ERR_DISK_TOO_SMALL;
goto force_diskless_dec;
{
unsigned long long nsz = drbd_new_dev_size(device, nbc, nbc->disk_conf->disk_size, 0);
unsigned long long eff = nbc->md.la_size_sect;
if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && nsz < eff) {
if (nsz == nbc->disk_conf->disk_size) {
drbd_warn(device, "truncating a consistent device during attach (%llu < %llu)\n", nsz, eff);
} else {
drbd_warn(device, "refusing to truncate a consistent device (%llu < %llu)\n", nsz, eff);
drbd_msg_sprintf_info(adm_ctx.reply_skb,
"To-be-attached device has last effective > current size, and is consistent\n"
"(%llu > %llu sectors). Refusing to attach.", eff, nsz);
retcode = ERR_IMPLICIT_SHRINK;
goto force_diskless_dec;
}
}
}
lock_all_resources();
@ -2654,8 +2728,10 @@ out:
static enum drbd_state_rv conn_try_disconnect(struct drbd_connection *connection, bool force)
{
enum drbd_conns cstate;
enum drbd_state_rv rv;
repeat:
rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),
force ? CS_HARD : 0);
@ -2673,6 +2749,11 @@ static enum drbd_state_rv conn_try_disconnect(struct drbd_connection *connection
break;
case SS_CW_FAILED_BY_PEER:
spin_lock_irq(&connection->resource->req_lock);
cstate = connection->cstate;
spin_unlock_irq(&connection->resource->req_lock);
if (cstate <= C_WF_CONNECTION)
goto repeat;
/* The peer probably wants to see us outdated. */
rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING,
disk, D_OUTDATED), 0);

47
drivers/block/drbd/drbd_protocol.h
View File

@ -70,6 +70,11 @@ enum drbd_packet {
* we may fall back to an opencoded loop instead. */
P_WSAME = 0x34,
/* 0x35 already claimed in DRBD 9 */
P_ZEROES = 0x36, /* data sock: zero-out, WRITE_ZEROES */
/* 0x40 .. 0x48 already claimed in DRBD 9 */
P_MAY_IGNORE = 0x100, /* Flag to test if (cmd > P_MAY_IGNORE) ... */
P_MAX_OPT_CMD = 0x101,
@ -130,6 +135,12 @@ struct p_header100 {
#define DP_SEND_RECEIVE_ACK 128 /* This is a proto B write request */
#define DP_SEND_WRITE_ACK 256 /* This is a proto C write request */
#define DP_WSAME 512 /* equiv. REQ_WRITE_SAME */
#define DP_ZEROES 1024 /* equiv. REQ_OP_WRITE_ZEROES */
/* possible combinations:
* REQ_OP_WRITE_ZEROES: DP_DISCARD | DP_ZEROES
* REQ_OP_WRITE_ZEROES + REQ_NOUNMAP: DP_ZEROES
*/
struct p_data {
u64 sector; /* 64 bits sector number */
@ -197,6 +208,42 @@ struct p_block_req {
*/
#define DRBD_FF_WSAME 4
/* supports REQ_OP_WRITE_ZEROES on the "wire" protocol.
*
* We used to map that to "discard" on the sending side, and if we cannot
* guarantee that discard zeroes data, the receiving side would map discard
* back to zero-out.
*
* With the introduction of REQ_OP_WRITE_ZEROES,
* we started to use that for both WRITE_ZEROES and DISCARDS,
* hoping that WRITE_ZEROES would "do what we want",
* UNMAP if possible, zero-out the rest.
*
* The example scenario is some LVM "thin" backend.
*
* While an un-allocated block on dm-thin reads as zeroes, on a dm-thin
* with "skip_block_zeroing=true", after a partial block write allocated
* that block, that same block may well map "undefined old garbage" from
* the backends on LBAs that have not yet been written to.
*
* If we cannot distinguish between zero-out and discard on the receiving
* side, to avoid "undefined old garbage" to pop up randomly at later times
* on supposedly zero-initialized blocks, we'd need to map all discards to
* zero-out on the receiving side. But that would potentially do a full
* alloc on thinly provisioned backends, even when the expectation was to
* unmap/trim/discard/de-allocate.
*
* We need to distinguish on the protocol level, whether we need to guarantee
* zeroes (and thus use zero-out, potentially doing the mentioned full-alloc),
* or if we want to put the emphasis on discard, and only do a "best effort
* zeroing" (by "discarding" blocks aligned to discard-granularity, and zeroing
* only potential unaligned head and tail clippings), to at least *try* to
* avoid "false positives" in an online-verify later, hoping that someone
* set skip_block_zeroing=false.
*/
#define DRBD_FF_WZEROES 8
struct p_connection_features {
u32 protocol_min;
u32 feature_flags;

251
drivers/block/drbd/drbd_receiver.c
View File

@ -50,7 +50,7 @@
#include "drbd_req.h"
#include "drbd_vli.h"
#define PRO_FEATURES (DRBD_FF_TRIM|DRBD_FF_THIN_RESYNC|DRBD_FF_WSAME)
#define PRO_FEATURES (DRBD_FF_TRIM|DRBD_FF_THIN_RESYNC|DRBD_FF_WSAME|DRBD_FF_WZEROES)
struct packet_info {
enum drbd_packet cmd;
@ -1490,14 +1490,129 @@ void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backin
drbd_info(resource, "Method to ensure write ordering: %s\n", write_ordering_str[resource->write_ordering]);
}
static void drbd_issue_peer_discard(struct drbd_device *device, struct drbd_peer_request *peer_req)
/*
* Mapping "discard" to ZEROOUT with UNMAP does not work for us:
* Drivers have to "announce" q->limits.max_write_zeroes_sectors, or it
* will directly go to fallback mode, submitting normal writes, and
* never even try to UNMAP.
*
* And dm-thin does not do this (yet), mostly because in general it has
* to assume that "skip_block_zeroing" is set. See also:
* https://www.mail-archive.com/dm-devel%40redhat.com/msg07965.html
* https://www.redhat.com/archives/dm-devel/2018-January/msg00271.html
*
* We *may* ignore the discard-zeroes-data setting, if so configured.
*
* Assumption is that this "discard_zeroes_data=0" is only because the backend
* may ignore partial unaligned discards.
*
* LVM/DM thin as of at least
* LVM version: 2.02.115(2)-RHEL7 (2015-01-28)
* Library version: 1.02.93-RHEL7 (2015-01-28)
* Driver version: 4.29.0
* still behaves this way.
*
* For unaligned (wrt. alignment and granularity) or too small discards,
* we zero-out the initial (and/or) trailing unaligned partial chunks,
* but discard all the aligned full chunks.
*
* At least for LVM/DM thin, with skip_block_zeroing=false,
* the result is effectively "discard_zeroes_data=1".
*/
/* flags: EE_TRIM|EE_ZEROOUT */
int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, unsigned int nr_sectors, int flags)
{
struct block_device *bdev = device->ldev->backing_bdev;
struct request_queue *q = bdev_get_queue(bdev);
sector_t tmp, nr;
unsigned int max_discard_sectors, granularity;
int alignment;
int err = 0;
if (blkdev_issue_zeroout(bdev, peer_req->i.sector, peer_req->i.size >> 9,
GFP_NOIO, 0))
if ((flags & EE_ZEROOUT) || !(flags & EE_TRIM))
goto zero_out;
/* Zero-sector (unknown) and one-sector granularities are the same. */
granularity = max(q->limits.discard_granularity >> 9, 1U);
alignment = (bdev_discard_alignment(bdev) >> 9) % granularity;
max_discard_sectors = min(q->limits.max_discard_sectors, (1U << 22));
max_discard_sectors -= max_discard_sectors % granularity;
if (unlikely(!max_discard_sectors))
goto zero_out;
if (nr_sectors < granularity)
goto zero_out;
tmp = start;
if (sector_div(tmp, granularity) != alignment) {
if (nr_sectors < 2*granularity)
goto zero_out;
/* start + gran - (start + gran - align) % gran */
tmp = start + granularity - alignment;
tmp = start + granularity - sector_div(tmp, granularity);
nr = tmp - start;
/* don't flag BLKDEV_ZERO_NOUNMAP, we don't know how many
* layers are below us, some may have smaller granularity */
err |= blkdev_issue_zeroout(bdev, start, nr, GFP_NOIO, 0);
nr_sectors -= nr;
start = tmp;
}
while (nr_sectors >= max_discard_sectors) {
err |= blkdev_issue_discard(bdev, start, max_discard_sectors, GFP_NOIO, 0);
nr_sectors -= max_discard_sectors;
start += max_discard_sectors;
}
if (nr_sectors) {
/* max_discard_sectors is unsigned int (and a multiple of
* granularity, we made sure of that above already);
* nr is < max_discard_sectors;
* I don't need sector_div here, even though nr is sector_t */
nr = nr_sectors;
nr -= (unsigned int)nr % granularity;
if (nr) {
err |= blkdev_issue_discard(bdev, start, nr, GFP_NOIO, 0);
nr_sectors -= nr;
start += nr;
}
}
zero_out:
if (nr_sectors) {
err |= blkdev_issue_zeroout(bdev, start, nr_sectors, GFP_NOIO,
(flags & EE_TRIM) ? 0 : BLKDEV_ZERO_NOUNMAP);
}
return err != 0;
}
static bool can_do_reliable_discards(struct drbd_device *device)
{
struct request_queue *q = bdev_get_queue(device->ldev->backing_bdev);
struct disk_conf *dc;
bool can_do;
if (!blk_queue_discard(q))
return false;
rcu_read_lock();
dc = rcu_dereference(device->ldev->disk_conf);
can_do = dc->discard_zeroes_if_aligned;
rcu_read_unlock();
return can_do;
}
static void drbd_issue_peer_discard_or_zero_out(struct drbd_device *device, struct drbd_peer_request *peer_req)
{
/* If the backend cannot discard, or does not guarantee
* read-back zeroes in discarded ranges, we fall back to
* zero-out. Unless configuration specifically requested
* otherwise. */
if (!can_do_reliable_discards(device))
peer_req->flags |= EE_ZEROOUT;
if (drbd_issue_discard_or_zero_out(device, peer_req->i.sector,
peer_req->i.size >> 9, peer_req->flags & (EE_ZEROOUT|EE_TRIM)))
peer_req->flags |= EE_WAS_ERROR;
drbd_endio_write_sec_final(peer_req);
}
@ -1550,7 +1665,7 @@ int drbd_submit_peer_request(struct drbd_device *device,
* Correctness first, performance later. Next step is to code an
* asynchronous variant of the same.
*/
if (peer_req->flags & (EE_IS_TRIM|EE_WRITE_SAME)) {
if (peer_req->flags & (EE_TRIM|EE_WRITE_SAME|EE_ZEROOUT)) {
/* wait for all pending IO completions, before we start
* zeroing things out. */
conn_wait_active_ee_empty(peer_req->peer_device->connection);
@ -1567,8 +1682,8 @@ int drbd_submit_peer_request(struct drbd_device *device,
spin_unlock_irq(&device->resource->req_lock);
}
if (peer_req->flags & EE_IS_TRIM)
drbd_issue_peer_discard(device, peer_req);
if (peer_req->flags & (EE_TRIM|EE_ZEROOUT))
drbd_issue_peer_discard_or_zero_out(device, peer_req);
else /* EE_WRITE_SAME */
drbd_issue_peer_wsame(device, peer_req);
return 0;
@ -1765,6 +1880,7 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector,
void *dig_vv = peer_device->connection->int_dig_vv;
unsigned long *data;
struct p_trim *trim = (pi->cmd == P_TRIM) ? pi->data : NULL;
struct p_trim *zeroes = (pi->cmd == P_ZEROES) ? pi->data : NULL;
struct p_trim *wsame = (pi->cmd == P_WSAME) ? pi->data : NULL;
digest_size = 0;
@ -1786,6 +1902,10 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector,
if (!expect(data_size == 0))
return NULL;
ds = be32_to_cpu(trim->size);
} else if (zeroes) {
if (!expect(data_size == 0))
return NULL;
ds = be32_to_cpu(zeroes->size);
} else if (wsame) {
if (data_size != queue_logical_block_size(device->rq_queue)) {
drbd_err(peer_device, "data size (%u) != drbd logical block size (%u)\n",
@ -1802,7 +1922,7 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector,
if (!expect(IS_ALIGNED(ds, 512)))
return NULL;
if (trim || wsame) {
if (trim || wsame || zeroes) {
if (!expect(ds <= (DRBD_MAX_BBIO_SECTORS << 9)))
return NULL;
} else if (!expect(ds <= DRBD_MAX_BIO_SIZE))
@ -1827,7 +1947,11 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector,
peer_req->flags |= EE_WRITE;
if (trim) {
peer_req->flags |= EE_IS_TRIM;
peer_req->flags |= EE_TRIM;
return peer_req;
}
if (zeroes) {
peer_req->flags |= EE_ZEROOUT;
return peer_req;
}
if (wsame)
@ -2326,8 +2450,12 @@ static unsigned long wire_flags_to_bio_flags(u32 dpf)
static unsigned long wire_flags_to_bio_op(u32 dpf)
{
if (dpf & DP_DISCARD)
if (dpf & DP_ZEROES)
return REQ_OP_WRITE_ZEROES;
if (dpf & DP_DISCARD)
return REQ_OP_DISCARD;
if (dpf & DP_WSAME)
return REQ_OP_WRITE_SAME;
else
return REQ_OP_WRITE;
}
@ -2517,9 +2645,20 @@ static int receive_Data(struct drbd_connection *connection, struct packet_info *
op = wire_flags_to_bio_op(dp_flags);
op_flags = wire_flags_to_bio_flags(dp_flags);
if (pi->cmd == P_TRIM) {
D_ASSERT(peer_device, peer_req->i.size > 0);
D_ASSERT(peer_device, op == REQ_OP_DISCARD);
D_ASSERT(peer_device, peer_req->pages == NULL);
/* need to play safe: an older DRBD sender
* may mean zero-out while sending P_TRIM. */
if (0 == (connection->agreed_features & DRBD_FF_WZEROES))
peer_req->flags |= EE_ZEROOUT;
} else if (pi->cmd == P_ZEROES) {
D_ASSERT(peer_device, peer_req->i.size > 0);
D_ASSERT(peer_device, op == REQ_OP_WRITE_ZEROES);
D_ASSERT(peer_device, peer_req->pages == NULL);
/* Do (not) pass down BLKDEV_ZERO_NOUNMAP? */
if (dp_flags & DP_DISCARD)
peer_req->flags |= EE_TRIM;
} else if (peer_req->pages == NULL) {
D_ASSERT(device, peer_req->i.size == 0);
D_ASSERT(device, dp_flags & DP_FLUSH);
@ -2587,7 +2726,7 @@ static int receive_Data(struct drbd_connection *connection, struct packet_info *
* we wait for all pending requests, respectively wait for
* active_ee to become empty in drbd_submit_peer_request();
* better not add ourselves here. */
if ((peer_req->flags & (EE_IS_TRIM|EE_WRITE_SAME)) == 0)
if ((peer_req->flags & (EE_TRIM|EE_WRITE_SAME|EE_ZEROOUT)) == 0)
list_add_tail(&peer_req->w.list, &device->active_ee);
spin_unlock_irq(&device->resource->req_lock);
@ -3364,7 +3503,7 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_peer_device *peer_device,
enum drbd_conns rv = C_MASK;
enum drbd_disk_state mydisk;
struct net_conf *nc;
int hg, rule_nr, rr_conflict, tentative;
int hg, rule_nr, rr_conflict, tentative, always_asbp;
mydisk = device->state.disk;
if (mydisk == D_NEGOTIATING)
@ -3415,8 +3554,12 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_peer_device *peer_device,
rcu_read_lock();
nc = rcu_dereference(peer_device->connection->net_conf);
always_asbp = nc->always_asbp;
rr_conflict = nc->rr_conflict;
tentative = nc->tentative;
rcu_read_unlock();
if (hg == 100 || (hg == -100 && nc->always_asbp)) {
if (hg == 100 || (hg == -100 && always_asbp)) {
int pcount = (device->state.role == R_PRIMARY)
+ (peer_role == R_PRIMARY);
int forced = (hg == -100);
@ -3455,9 +3598,6 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_peer_device *peer_device,
"Sync from %s node\n",
(hg < 0) ? "peer" : "this");
}
rr_conflict = nc->rr_conflict;
tentative = nc->tentative;
rcu_read_unlock();
if (hg == -100) {
/* FIXME this log message is not correct if we end up here
@ -3980,6 +4120,7 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info
struct o_qlim *o = (connection->agreed_features & DRBD_FF_WSAME) ? p->qlim : NULL;
enum determine_dev_size dd = DS_UNCHANGED;
sector_t p_size, p_usize, p_csize, my_usize;
sector_t new_size, cur_size;
int ldsc = 0; /* local disk size changed */
enum dds_flags ddsf;
@ -3987,6 +4128,7 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info
if (!peer_device)
return config_unknown_volume(connection, pi);
device = peer_device->device;
cur_size = drbd_get_capacity(device->this_bdev);
p_size = be64_to_cpu(p->d_size);
p_usize = be64_to_cpu(p->u_size);
@ -3997,7 +4139,6 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info
device->p_size = p_size;
if (get_ldev(device)) {
sector_t new_size, cur_size;
rcu_read_lock();
my_usize = rcu_dereference(device->ldev->disk_conf)->disk_size;
rcu_read_unlock();
@ -4012,13 +4153,13 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info
if (device->state.conn == C_WF_REPORT_PARAMS)
p_usize = min_not_zero(my_usize, p_usize);
/* Never shrink a device with usable data during connect.
But allow online shrinking if we are connected. */
/* Never shrink a device with usable data during connect,
* or "attach" on the peer.
* But allow online shrinking if we are connected. */
new_size = drbd_new_dev_size(device, device->ldev, p_usize, 0);
cur_size = drbd_get_capacity(device->this_bdev);
if (new_size < cur_size &&
device->state.disk >= D_OUTDATED &&
device->state.conn < C_CONNECTED) {
(device->state.conn < C_CONNECTED || device->state.pdsk == D_DISKLESS)) {
drbd_err(device, "The peer's disk size is too small! (%llu < %llu sectors)\n",
(unsigned long long)new_size, (unsigned long long)cur_size);
conn_request_state(peer_device->connection, NS(conn, C_DISCONNECTING), CS_HARD);
@ -4046,8 +4187,8 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info
synchronize_rcu();
kfree(old_disk_conf);
drbd_info(device, "Peer sets u_size to %lu sectors\n",
(unsigned long)my_usize);
drbd_info(device, "Peer sets u_size to %lu sectors (old: %lu)\n",
(unsigned long)p_usize, (unsigned long)my_usize);
}
put_ldev(device);
@ -4080,9 +4221,36 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info
*
* However, if he sends a zero current size,
* take his (user-capped or) backing disk size anyways.
*
* Unless of course he does not have a disk himself.
* In which case we ignore this completely.
*/
sector_t new_size = p_csize ?: p_usize ?: p_size;
drbd_reconsider_queue_parameters(device, NULL, o);
drbd_set_my_capacity(device, p_csize ?: p_usize ?: p_size);
if (new_size == 0) {
/* Ignore, peer does not know nothing. */
} else if (new_size == cur_size) {
/* nothing to do */
} else if (cur_size != 0 && p_size == 0) {
drbd_warn(device, "Ignored diskless peer device size (peer:%llu != me:%llu sectors)!\n",
(unsigned long long)new_size, (unsigned long long)cur_size);
} else if (new_size < cur_size && device->state.role == R_PRIMARY) {
drbd_err(device, "The peer's device size is too small! (%llu < %llu sectors); demote me first!\n",
(unsigned long long)new_size, (unsigned long long)cur_size);
conn_request_state(peer_device->connection, NS(conn, C_DISCONNECTING), CS_HARD);
return -EIO;
} else {
/* I believe the peer, if
* - I don't have a current size myself
* - we agree on the size anyways
* - I do have a current size, am Secondary,
* and he has the only disk
* - I do have a current size, am Primary,
* and he has the only disk,
* which is larger than my current size
*/
drbd_set_my_capacity(device, new_size);
}
}
if (get_ldev(device)) {
@ -4142,7 +4310,7 @@ static int receive_uuids(struct drbd_connection *connection, struct packet_info
kfree(device->p_uuid);
device->p_uuid = p_uuid;
if (device->state.conn < C_CONNECTED &&
if ((device->state.conn < C_CONNECTED || device->state.pdsk == D_DISKLESS) &&
device->state.disk < D_INCONSISTENT &&
device->state.role == R_PRIMARY &&
(device->ed_uuid & ~((u64)1)) != (p_uuid[UI_CURRENT] & ~((u64)1))) {
@ -4368,6 +4536,25 @@ static int receive_state(struct drbd_connection *connection, struct packet_info
if (peer_state.conn == C_AHEAD)
ns.conn = C_BEHIND;
/* TODO:
* if (primary and diskless and peer uuid != effective uuid)
* abort attach on peer;
*
* If this node does not have good data, was already connected, but
* the peer did a late attach only now, trying to "negotiate" with me,
* AND I am currently Primary, possibly frozen, with some specific
* "effective" uuid, this should never be reached, really, because
* we first send the uuids, then the current state.
*
* In this scenario, we already dropped the connection hard
* when we received the unsuitable uuids (receive_uuids().
*
* Should we want to change this, that is: not drop the connection in
* receive_uuids() already, then we would need to add a branch here
* that aborts the attach of "unsuitable uuids" on the peer in case
* this node is currently Diskless Primary.
*/
if (device->p_uuid && peer_state.disk >= D_NEGOTIATING &&
get_ldev_if_state(device, D_NEGOTIATING)) {
int cr; /* consider resync */
@ -4380,7 +4567,7 @@ static int receive_state(struct drbd_connection *connection, struct packet_info
(peer_state.disk == D_NEGOTIATING ||
os.disk == D_NEGOTIATING));
/* if we have both been inconsistent, and the peer has been
* forced to be UpToDate with --overwrite-data */
* forced to be UpToDate with --force */
cr |= test_bit(CONSIDER_RESYNC, &device->flags);
/* if we had been plain connected, and the admin requested to
* start a sync by "invalidate" or "invalidate-remote" */
@ -4845,7 +5032,7 @@ static int receive_rs_deallocated(struct drbd_connection *connection, struct pac
peer_req->w.cb = e_end_resync_block;
peer_req->submit_jif = jiffies;
peer_req->flags |= EE_IS_TRIM;
peer_req->flags |= EE_TRIM;
spin_lock_irq(&device->resource->req_lock);
list_add_tail(&peer_req->w.list, &device->sync_ee);
@ -4913,6 +5100,7 @@ static struct data_cmd drbd_cmd_handler[] = {
[P_CONN_ST_CHG_REQ] = { 0, sizeof(struct p_req_state), receive_req_conn_state },
[P_PROTOCOL_UPDATE] = { 1, sizeof(struct p_protocol), receive_protocol },
[P_TRIM] = { 0, sizeof(struct p_trim), receive_Data },
[P_ZEROES] = { 0, sizeof(struct p_trim), receive_Data },
[P_RS_DEALLOCATED] = { 0, sizeof(struct p_block_desc), receive_rs_deallocated },
[P_WSAME] = { 1, sizeof(struct p_wsame), receive_Data },
};
@ -5197,11 +5385,12 @@ static int drbd_do_features(struct drbd_connection *connection)
drbd_info(connection, "Handshake successful: "
"Agreed network protocol version %d\n", connection->agreed_pro_version);
drbd_info(connection, "Feature flags enabled on protocol level: 0x%x%s%s%s.\n",
drbd_info(connection, "Feature flags enabled on protocol level: 0x%x%s%s%s%s.\n",
connection->agreed_features,
connection->agreed_features & DRBD_FF_TRIM ? " TRIM" : "",
connection->agreed_features & DRBD_FF_THIN_RESYNC ? " THIN_RESYNC" : "",
connection->agreed_features & DRBD_FF_WSAME ? " WRITE_SAME" :
connection->agreed_features & DRBD_FF_WSAME ? " WRITE_SAME" : "",
connection->agreed_features & DRBD_FF_WZEROES ? " WRITE_ZEROES" :
connection->agreed_features ? "" : " none");
return 1;
@ -5284,7 +5473,7 @@ static int drbd_do_auth(struct drbd_connection *connection)
if (pi.cmd != P_AUTH_CHALLENGE) {
drbd_err(connection, "expected AuthChallenge packet, received: %s (0x%04x)\n",
cmdname(pi.cmd), pi.cmd);
rv = 0;
rv = -1;
goto fail;
}

19
drivers/block/drbd/drbd_req.c
View File

@ -63,7 +63,7 @@ static struct drbd_request *drbd_req_new(struct drbd_device *device, struct bio
drbd_req_make_private_bio(req, bio_src);
req->rq_state = (bio_data_dir(bio_src) == WRITE ? RQ_WRITE : 0)
| (bio_op(bio_src) == REQ_OP_WRITE_SAME ? RQ_WSAME : 0)
| (bio_op(bio_src) == REQ_OP_WRITE_ZEROES ? RQ_UNMAP : 0)
| (bio_op(bio_src) == REQ_OP_WRITE_ZEROES ? RQ_ZEROES : 0)
| (bio_op(bio_src) == REQ_OP_DISCARD ? RQ_UNMAP : 0);
req->device = device;
req->master_bio = bio_src;
@ -1155,12 +1155,11 @@ static int drbd_process_write_request(struct drbd_request *req)
return remote;
}
static void drbd_process_discard_req(struct drbd_request *req)
static void drbd_process_discard_or_zeroes_req(struct drbd_request *req, int flags)
{
struct block_device *bdev = req->device->ldev->backing_bdev;
if (blkdev_issue_zeroout(bdev, req->i.sector, req->i.size >> 9,
GFP_NOIO, 0))
int err = drbd_issue_discard_or_zero_out(req->device,
req->i.sector, req->i.size >> 9, flags);
if (err)
req->private_bio->bi_status = BLK_STS_IOERR;
bio_endio(req->private_bio);
}
@ -1189,9 +1188,11 @@ drbd_submit_req_private_bio(struct drbd_request *req)
if (get_ldev(device)) {
if (drbd_insert_fault(device, type))
bio_io_error(bio);
else if (bio_op(bio) == REQ_OP_WRITE_ZEROES ||
bio_op(bio) == REQ_OP_DISCARD)
drbd_process_discard_req(req);
else if (bio_op(bio) == REQ_OP_WRITE_ZEROES)
drbd_process_discard_or_zeroes_req(req, EE_ZEROOUT |
((bio->bi_opf & REQ_NOUNMAP) ? 0 : EE_TRIM));
else if (bio_op(bio) == REQ_OP_DISCARD)
drbd_process_discard_or_zeroes_req(req, EE_TRIM);
else
generic_make_request(bio);
put_ldev(device);

2
drivers/block/drbd/drbd_req.h
View File

@ -208,6 +208,7 @@ enum drbd_req_state_bits {
__RQ_WRITE,
__RQ_WSAME,
__RQ_UNMAP,
__RQ_ZEROES,
/* Should call drbd_al_complete_io() for this request... */
__RQ_IN_ACT_LOG,
@ -253,6 +254,7 @@ enum drbd_req_state_bits {
#define RQ_WRITE (1UL << __RQ_WRITE)
#define RQ_WSAME (1UL << __RQ_WSAME)
#define RQ_UNMAP (1UL << __RQ_UNMAP)
#define RQ_ZEROES (1UL << __RQ_ZEROES)
#define RQ_IN_ACT_LOG (1UL << __RQ_IN_ACT_LOG)
#define RQ_UNPLUG (1UL << __RQ_UNPLUG)
#define RQ_POSTPONED (1UL << __RQ_POSTPONED)

11
drivers/block/drbd/drbd_state.c
View File

@ -688,11 +688,9 @@ request_detach(struct drbd_device *device)
CS_VERBOSE | CS_ORDERED | CS_INHIBIT_MD_IO);
}
enum drbd_state_rv
drbd_request_detach_interruptible(struct drbd_device *device)
int drbd_request_detach_interruptible(struct drbd_device *device)
{
enum drbd_state_rv rv;
int ret;
int ret, rv;
drbd_suspend_io(device); /* so no-one is stuck in drbd_al_begin_io */
wait_event_interruptible(device->state_wait,
@ -1124,7 +1122,7 @@ static union drbd_state sanitize_state(struct drbd_device *device, union drbd_st
ns.pdsk = D_UP_TO_DATE;
}
/* Implications of the connection stat on the disk states */
/* Implications of the connection state on the disk states */
disk_min = D_DISKLESS;
disk_max = D_UP_TO_DATE;
pdsk_min = D_INCONSISTENT;
@ -2109,9 +2107,8 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused)
spin_unlock_irq(&connection->resource->req_lock);
}
}
kref_put(&connection->kref, drbd_destroy_connection);
conn_md_sync(connection);
kref_put(&connection->kref, drbd_destroy_connection);
return 0;
}

5
drivers/block/drbd/drbd_state.h
View File

@ -131,7 +131,7 @@ extern enum drbd_state_rv _drbd_set_state(struct drbd_device *, union drbd_state
enum chg_state_flags,
struct completion *done);
extern void print_st_err(struct drbd_device *, union drbd_state,
union drbd_state, int);
union drbd_state, enum drbd_state_rv);
enum drbd_state_rv
_conn_request_state(struct drbd_connection *connection, union drbd_state mask, union drbd_state val,
@ -162,8 +162,7 @@ static inline int drbd_request_state(struct drbd_device *device,
}
/* for use in adm_detach() (drbd_adm_detach(), drbd_adm_down()) */
enum drbd_state_rv
drbd_request_detach_interruptible(struct drbd_device *device);
int drbd_request_detach_interruptible(struct drbd_device *device);
enum drbd_role conn_highest_role(struct drbd_connection *connection);
enum drbd_role conn_highest_peer(struct drbd_connection *connection);

2
drivers/block/drbd/drbd_worker.c
View File

@ -153,7 +153,7 @@ void drbd_endio_write_sec_final(struct drbd_peer_request *peer_req) __releases(l
do_wake = list_empty(block_id == ID_SYNCER ? &device->sync_ee : &device->active_ee);
/* FIXME do we want to detach for failed REQ_OP_DISCARD?
* ((peer_req->flags & (EE_WAS_ERROR|EE_IS_TRIM)) == EE_WAS_ERROR) */
* ((peer_req->flags & (EE_WAS_ERROR|EE_TRIM)) == EE_WAS_ERROR) */
if (peer_req->flags & EE_WAS_ERROR)
__drbd_chk_io_error(device, DRBD_WRITE_ERROR);

1
drivers/block/loop.c
View File

@ -616,7 +616,6 @@ static int do_req_filebacked(struct loop_device *lo, struct request *rq)
default:
WARN_ON_ONCE(1);
return -EIO;
break;
}
}

1
drivers/block/sunvdc.c
View File

@ -633,7 +633,6 @@ static int generic_request(struct vdc_port *port, u8 op, void *buf, int len)
case VD_OP_GET_EFI:
case VD_OP_SET_EFI:
return -EOPNOTSUPP;
break;
};
map_perm |= LDC_MAP_SHADOW | LDC_MAP_DIRECT | LDC_MAP_IO;

14
drivers/block/swim3.c
View File

@ -995,7 +995,11 @@ static void floppy_release(struct gendisk *disk, fmode_t mode)
struct swim3 __iomem *sw = fs->swim3;
mutex_lock(&swim3_mutex);
if (fs->ref_count > 0 && --fs->ref_count == 0) {
if (fs->ref_count > 0)
--fs->ref_count;
else if (fs->ref_count == -1)
fs->ref_count = 0;
if (fs->ref_count == 0) {
swim3_action(fs, MOTOR_OFF);
out_8(&sw->control_bic, 0xff);
swim3_select(fs, RELAX);
@ -1087,8 +1091,6 @@ static int swim3_add_device(struct macio_dev *mdev, int index)
struct floppy_state *fs = &floppy_states[index];
int rc = -EBUSY;
/* Do this first for message macros */
memset(fs, 0, sizeof(*fs));
fs->mdev = mdev;
fs->index = index;
@ -1151,7 +1153,6 @@ static int swim3_add_device(struct macio_dev *mdev, int index)
swim3_err("%s", "Couldn't request interrupt\n");
pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0);
goto out_unmap;
return -EBUSY;
}
timer_setup(&fs->timeout, NULL, 0);
@ -1188,14 +1189,15 @@ static int swim3_attach(struct macio_dev *mdev,
return rc;
}
fs = &floppy_states[floppy_count];
disk = alloc_disk(1);
if (disk == NULL) {
rc = -ENOMEM;
goto out_unregister;
}
fs = &floppy_states[floppy_count];
memset(fs, 0, sizeof(*fs));
disk->queue = blk_mq_init_sq_queue(&fs->tag_set, &swim3_mq_ops, 2,
BLK_MQ_F_SHOULD_MERGE);
if (IS_ERR(disk->queue)) {

1
drivers/cdrom/gdrom.c
View File

@ -873,6 +873,7 @@ static void __exit exit_gdrom(void)
platform_device_unregister(pd);
platform_driver_unregister(&gdrom_driver);
kfree(gd.toc);
kfree(gd.cd_info);
}
module_init(init_gdrom);

1
drivers/lightnvm/pblk-recovery.c
View File

@ -418,7 +418,6 @@ retry_rq:
if (ret) {
pblk_err(pblk, "I/O submission failed: %d\n", ret);
bio_put(bio);
bio_put(bio);
return ret;
}

23
include/linux/blk-cgroup.h
View File

@ -499,22 +499,33 @@ static inline void blkg_get(struct blkcg_gq *blkg)
*/
static inline bool blkg_tryget(struct blkcg_gq *blkg)
{
return percpu_ref_tryget(&blkg->refcnt);
return blkg && percpu_ref_tryget(&blkg->refcnt);
}
/**
* blkg_tryget_closest - try and get a blkg ref on the closet blkg
* @blkg: blkg to get
*
* This walks up the blkg tree to find the closest non-dying blkg and returns
* the blkg that it did association with as it may not be the passed in blkg.
* This needs to be called rcu protected. As the failure mode here is to walk
* up the blkg tree, this ensure that the blkg->parent pointers are always
* valid. This returns the blkg that it ended up taking a reference on or %NULL
* if no reference was taken.
*/
static inline struct blkcg_gq *blkg_tryget_closest(struct blkcg_gq *blkg)
{
while (blkg && !percpu_ref_tryget(&blkg->refcnt))
blkg = blkg->parent;
struct blkcg_gq *ret_blkg = NULL;
return blkg;
WARN_ON_ONCE(!rcu_read_lock_held());
while (blkg) {
if (blkg_tryget(blkg)) {
ret_blkg = blkg;
break;
}
blkg = blkg->parent;
}
return ret_blkg;
}
/**

2
include/linux/drbd.h
View File

@ -51,7 +51,7 @@
#endif
extern const char *drbd_buildtag(void);
#define REL_VERSION "8.4.10"
#define REL_VERSION "8.4.11"
#define API_VERSION 1
#define PRO_VERSION_MIN 86
#define PRO_VERSION_MAX 101

5
include/linux/genl_magic_struct.h
View File

@ -191,6 +191,7 @@ static inline void ct_assert_unique_operations(void)
{
switch (0) {
#include GENL_MAGIC_INCLUDE_FILE
case 0:
;
}
}
@ -209,6 +210,7 @@ static inline void ct_assert_unique_top_level_attributes(void)
{
switch (0) {
#include GENL_MAGIC_INCLUDE_FILE
case 0:
;
}
}
@ -218,7 +220,8 @@ static inline void ct_assert_unique_top_level_attributes(void)
static inline void ct_assert_unique_ ## s_name ## _attributes(void) \
{ \
switch (0) { \
s_fields \
s_fields \
case 0: \
; \
} \
}