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staging/lustre/osc: Adjust comments to better conform to coding style

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This patch fixes "Block comments use a trailing */ on a separate line"
warnings from checkpatch

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oleg Drokin 2016-02-24 22:00:37 -05:00 committed by Greg Kroah-Hartman
parent 35f0d1abb7
commit 30aa9c5262
8 changed files with 310 additions and 159 deletions
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168
drivers/staging/lustre/lustre/osc/osc_cache.c
View File

@ -262,7 +262,8 @@ static int osc_extent_sanity_check0(struct osc_extent *ext,
}
/* Do not verify page list if extent is in RPC. This is because an
* in-RPC extent is supposed to be exclusively accessible w/o lock. */
* in-RPC extent is supposed to be exclusively accessible w/o lock.
*/
if (ext->oe_state > OES_CACHE) {
rc = 0;
goto out;
@ -587,7 +588,8 @@ void osc_extent_release(const struct lu_env *env, struct osc_extent *ext)
if (ext->oe_trunc_pending) {
/* a truncate process is waiting for this extent.
* This may happen due to a race, check
* osc_cache_truncate_start(). */
* osc_cache_truncate_start().
*/
osc_extent_state_set(ext, OES_TRUNC);
ext->oe_trunc_pending = 0;
} else {
@ -704,18 +706,21 @@ static struct osc_extent *osc_extent_find(const struct lu_env *env,
/* ok, from now on, ext and cur have these attrs:
* 1. covered by the same lock
* 2. contiguous at chunk level or overlapping. */
* 2. contiguous at chunk level or overlapping.
*/
if (overlapped(ext, cur)) {
/* cur is the minimum unit, so overlapping means
* full contain. */
* full contain.
*/
EASSERTF((ext->oe_start <= cur->oe_start &&
ext->oe_end >= cur->oe_end),
ext, EXTSTR, EXTPARA(cur));
if (ext->oe_state > OES_CACHE || ext->oe_fsync_wait) {
/* for simplicity, we wait for this extent to
* finish before going forward. */
* finish before going forward.
*/
conflict = osc_extent_get(ext);
break;
}
@ -728,17 +733,20 @@ static struct osc_extent *osc_extent_find(const struct lu_env *env,
if (ext->oe_state != OES_CACHE || ext->oe_fsync_wait) {
/* we can't do anything for a non OES_CACHE extent, or
* if there is someone waiting for this extent to be
* flushed, try next one. */
* flushed, try next one.
*/
ext = next_extent(ext);
continue;
}
/* check if they belong to the same rpc slot before trying to
* merge. the extents are not overlapped and contiguous at
* chunk level to get here. */
* chunk level to get here.
*/
if (ext->oe_max_end != max_end) {
/* if they don't belong to the same RPC slot or
* max_pages_per_rpc has ever changed, do not merge. */
* max_pages_per_rpc has ever changed, do not merge.
*/
ext = next_extent(ext);
continue;
}
@ -747,7 +755,8 @@ static struct osc_extent *osc_extent_find(const struct lu_env *env,
* level so that we know the whole extent is covered by grant
* (the pages in the extent are NOT required to be contiguous).
* Otherwise, it will be too much difficult to know which
* chunks have grants allocated. */
* chunks have grants allocated.
*/
/* try to do front merge - extend ext's start */
if (chunk + 1 == ext_chk_start) {
@ -767,7 +776,8 @@ static struct osc_extent *osc_extent_find(const struct lu_env *env,
*grants -= chunksize;
/* try to merge with the next one because we just fill
* in a gap */
* in a gap
*/
if (osc_extent_merge(env, ext, next_extent(ext)) == 0)
/* we can save extent tax from next extent */
*grants += cli->cl_extent_tax;
@ -807,7 +817,8 @@ static struct osc_extent *osc_extent_find(const struct lu_env *env,
LASSERT(!found);
/* waiting for IO to finish. Please notice that it's impossible
* to be an OES_TRUNC extent. */
* to be an OES_TRUNC extent.
*/
rc = osc_extent_wait(env, conflict, OES_INV);
osc_extent_put(env, conflict);
conflict = NULL;
@ -864,7 +875,8 @@ int osc_extent_finish(const struct lu_env *env, struct osc_extent *ext,
last_count != PAGE_CACHE_SIZE) {
/* For short writes we shouldn't count parts of pages that
* span a whole chunk on the OST side, or our accounting goes
* wrong. Should match the code in filter_grant_check. */
* wrong. Should match the code in filter_grant_check.
*/
int offset = oap->oap_page_off & ~CFS_PAGE_MASK;
int count = oap->oap_count + (offset & (blocksize - 1));
int end = (offset + oap->oap_count) & (blocksize - 1);
@ -908,7 +920,8 @@ static int osc_extent_wait(const struct lu_env *env, struct osc_extent *ext,
osc_object_lock(obj);
LASSERT(sanity_check_nolock(ext) == 0);
/* `Kick' this extent only if the caller is waiting for it to be
* written out. */
* written out.
*/
if (state == OES_INV && !ext->oe_urgent && !ext->oe_hp &&
!ext->oe_trunc_pending) {
if (ext->oe_state == OES_ACTIVE) {
@ -966,7 +979,8 @@ static int osc_extent_truncate(struct osc_extent *ext, pgoff_t trunc_index,
/* Request new lu_env.
* We can't use that env from osc_cache_truncate_start() because
* it's from lov_io_sub and not fully initialized. */
* it's from lov_io_sub and not fully initialized.
*/
env = cl_env_nested_get(&nest);
io = &osc_env_info(env)->oti_io;
io->ci_obj = cl_object_top(osc2cl(obj));
@ -983,7 +997,8 @@ static int osc_extent_truncate(struct osc_extent *ext, pgoff_t trunc_index,
LASSERT(list_empty(&oap->oap_rpc_item));
/* only discard the pages with their index greater than
* trunc_index, and ... */
* trunc_index, and ...
*/
if (sub->cp_index < trunc_index ||
(sub->cp_index == trunc_index && partial)) {
/* accounting how many pages remaining in the chunk
@ -1027,11 +1042,13 @@ static int osc_extent_truncate(struct osc_extent *ext, pgoff_t trunc_index,
pgoff_t last_index;
/* if there is no pages in this chunk, we can also free grants
* for the last chunk */
* for the last chunk
*/
if (pages_in_chunk == 0) {
/* if this is the 1st chunk and no pages in this chunk,
* ext->oe_nr_pages must be zero, so we should be in
* the other if-clause. */
* the other if-clause.
*/
LASSERT(trunc_chunk > 0);
--trunc_chunk;
++chunks;
@ -1104,7 +1121,8 @@ static int osc_extent_make_ready(const struct lu_env *env,
LASSERT(page_count == ext->oe_nr_pages);
LASSERT(last);
/* the last page is the only one we need to refresh its count by
* the size of file. */
* the size of file.
*/
if (!(last->oap_async_flags & ASYNC_COUNT_STABLE)) {
last->oap_count = osc_refresh_count(env, last, OBD_BRW_WRITE);
LASSERT(last->oap_count > 0);
@ -1113,7 +1131,8 @@ static int osc_extent_make_ready(const struct lu_env *env,
}
/* for the rest of pages, we don't need to call osf_refresh_count()
* because it's known they are not the last page */
* because it's known they are not the last page
*/
list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE)) {
oap->oap_count = PAGE_CACHE_SIZE - oap->oap_page_off;
@ -1168,7 +1187,8 @@ static int osc_extent_expand(struct osc_extent *ext, pgoff_t index, int *grants)
next = next_extent(ext);
if (next && next->oe_start <= end_index) {
/* complex mode - overlapped with the next extent,
* this case will be handled by osc_extent_find() */
* this case will be handled by osc_extent_find()
*/
rc = -EAGAIN;
goto out;
}
@ -1365,7 +1385,8 @@ static void osc_consume_write_grant(struct client_obd *cli,
}
/* the companion to osc_consume_write_grant, called when a brw has completed.
* must be called with the loi lock held. */
* must be called with the loi lock held.
*/
static void osc_release_write_grant(struct client_obd *cli,
struct brw_page *pga)
{
@ -1408,7 +1429,8 @@ static void __osc_unreserve_grant(struct client_obd *cli,
/* it's quite normal for us to get more grant than reserved.
* Thinking about a case that two extents merged by adding a new
* chunk, we can save one extent tax. If extent tax is greater than
* one chunk, we can save more grant by adding a new chunk */
* one chunk, we can save more grant by adding a new chunk
*/
cli->cl_reserved_grant -= reserved;
if (unused > reserved) {
cli->cl_avail_grant += reserved;
@ -1452,7 +1474,8 @@ static void osc_free_grant(struct client_obd *cli, unsigned int nr_pages,
cli->cl_lost_grant += lost_grant;
if (cli->cl_avail_grant < grant && cli->cl_lost_grant >= grant) {
/* borrow some grant from truncate to avoid the case that
* truncate uses up all avail grant */
* truncate uses up all avail grant
*/
cli->cl_lost_grant -= grant;
cli->cl_avail_grant += grant;
}
@ -1537,7 +1560,8 @@ static int osc_enter_cache(const struct lu_env *env, struct client_obd *cli,
client_obd_list_lock(&cli->cl_loi_list_lock);
/* force the caller to try sync io. this can jump the list
* of queued writes and create a discontiguous rpc stream */
* of queued writes and create a discontiguous rpc stream
*/
if (OBD_FAIL_CHECK(OBD_FAIL_OSC_NO_GRANT) ||
cli->cl_dirty_max < PAGE_CACHE_SIZE ||
cli->cl_ar.ar_force_sync || loi->loi_ar.ar_force_sync) {
@ -1556,7 +1580,8 @@ static int osc_enter_cache(const struct lu_env *env, struct client_obd *cli,
* Adding a cache waiter will trigger urgent write-out no matter what
* RPC size will be.
* The exiting condition is no avail grants and no dirty pages caching,
* that really means there is no space on the OST. */
* that really means there is no space on the OST.
*/
init_waitqueue_head(&ocw.ocw_waitq);
ocw.ocw_oap = oap;
ocw.ocw_grant = bytes;
@ -1638,7 +1663,8 @@ static int osc_max_rpc_in_flight(struct client_obd *cli, struct osc_object *osc)
/* This maintains the lists of pending pages to read/write for a given object
* (lop). This is used by osc_check_rpcs->osc_next_obj() and osc_list_maint()
* to quickly find objects that are ready to send an RPC. */
* to quickly find objects that are ready to send an RPC.
*/
static int osc_makes_rpc(struct client_obd *cli, struct osc_object *osc,
int cmd)
{
@ -1647,7 +1673,8 @@ static int osc_makes_rpc(struct client_obd *cli, struct osc_object *osc,
/* if we have an invalid import we want to drain the queued pages
* by forcing them through rpcs that immediately fail and complete
* the pages. recovery relies on this to empty the queued pages
* before canceling the locks and evicting down the llite pages */
* before canceling the locks and evicting down the llite pages
*/
if (!cli->cl_import || cli->cl_import->imp_invalid)
invalid_import = 1;
@ -1668,7 +1695,8 @@ static int osc_makes_rpc(struct client_obd *cli, struct osc_object *osc,
}
/* trigger a write rpc stream as long as there are dirtiers
* waiting for space. as they're waiting, they're not going to
* create more pages to coalesce with what's waiting.. */
* create more pages to coalesce with what's waiting..
*/
if (!list_empty(&cli->cl_cache_waiters)) {
CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
return 1;
@ -1721,7 +1749,8 @@ static void on_list(struct list_head *item, struct list_head *list, int should_b
}
/* maintain the osc's cli list membership invariants so that osc_send_oap_rpc
* can find pages to build into rpcs quickly */
* can find pages to build into rpcs quickly
*/
static int __osc_list_maint(struct client_obd *cli, struct osc_object *osc)
{
if (osc_makes_hprpc(osc)) {
@ -1759,7 +1788,8 @@ static int osc_list_maint(struct client_obd *cli, struct osc_object *osc)
* application. As an async write fails we record the error code for later if
* the app does an fsync. As long as errors persist we force future rpcs to be
* sync so that the app can get a sync error and break the cycle of queueing
* pages for which writeback will fail. */
* pages for which writeback will fail.
*/
static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
int rc)
{
@ -1778,7 +1808,8 @@ static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
}
/* this must be called holding the loi list lock to give coverage to exit_cache,
* async_flag maintenance, and oap_request */
* async_flag maintenance, and oap_request
*/
static void osc_ap_completion(const struct lu_env *env, struct client_obd *cli,
struct osc_async_page *oap, int sent, int rc)
{
@ -1966,7 +1997,8 @@ osc_send_write_rpc(const struct lu_env *env, struct client_obd *cli,
}
/* we're going to grab page lock, so release object lock because
* lock order is page lock -> object lock. */
* lock order is page lock -> object lock.
*/
osc_object_unlock(osc);
list_for_each_entry_safe(ext, tmp, &rpclist, oe_link) {
@ -2051,12 +2083,14 @@ osc_send_read_rpc(const struct lu_env *env, struct client_obd *cli,
})
/* This is called by osc_check_rpcs() to find which objects have pages that
* we could be sending. These lists are maintained by osc_makes_rpc(). */
* we could be sending. These lists are maintained by osc_makes_rpc().
*/
static struct osc_object *osc_next_obj(struct client_obd *cli)
{
/* First return objects that have blocked locks so that they
* will be flushed quickly and other clients can get the lock,
* then objects which have pages ready to be stuffed into RPCs */
* then objects which have pages ready to be stuffed into RPCs
*/
if (!list_empty(&cli->cl_loi_hp_ready_list))
return list_to_obj(&cli->cl_loi_hp_ready_list, hp_ready_item);
if (!list_empty(&cli->cl_loi_ready_list))
@ -2065,13 +2099,15 @@ static struct osc_object *osc_next_obj(struct client_obd *cli)
/* then if we have cache waiters, return all objects with queued
* writes. This is especially important when many small files
* have filled up the cache and not been fired into rpcs because
* they don't pass the nr_pending/object threshold */
* they don't pass the nr_pending/object threshold
*/
if (!list_empty(&cli->cl_cache_waiters) &&
!list_empty(&cli->cl_loi_write_list))
return list_to_obj(&cli->cl_loi_write_list, write_item);
/* then return all queued objects when we have an invalid import
* so that they get flushed */
* so that they get flushed
*/
if (!cli->cl_import || cli->cl_import->imp_invalid) {
if (!list_empty(&cli->cl_loi_write_list))
return list_to_obj(&cli->cl_loi_write_list, write_item);
@ -2109,7 +2145,8 @@ static void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli)
* would be redundant if we were getting read/write work items
* instead of objects. we don't want send_oap_rpc to drain a
* partial read pending queue when we're given this object to
* do io on writes while there are cache waiters */
* do io on writes while there are cache waiters
*/
osc_object_lock(osc);
if (osc_makes_rpc(cli, osc, OBD_BRW_WRITE)) {
rc = osc_send_write_rpc(env, cli, osc);
@ -2131,7 +2168,8 @@ static void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli)
* because it might be blocked at grabbing
* the page lock as we mentioned.
*
* Anyway, continue to drain pages. */
* Anyway, continue to drain pages.
*/
/* break; */
}
}
@ -2161,7 +2199,8 @@ static int osc_io_unplug0(const struct lu_env *env, struct client_obd *cli,
if (!async) {
/* disable osc_lru_shrink() temporarily to avoid
* potential stack overrun problem. LU-2859 */
* potential stack overrun problem. LU-2859
*/
atomic_inc(&cli->cl_lru_shrinkers);
client_obd_list_lock(&cli->cl_loi_list_lock);
osc_check_rpcs(env, cli);
@ -2285,12 +2324,14 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
* 1. if there exists an active extent for this IO, mostly this page
* can be added to the active extent and sometimes we need to
* expand extent to accommodate this page;
* 2. otherwise, a new extent will be allocated. */
* 2. otherwise, a new extent will be allocated.
*/
ext = oio->oi_active;
if (ext && ext->oe_start <= index && ext->oe_max_end >= index) {
/* one chunk plus extent overhead must be enough to write this
* page */
* page
*/
grants = (1 << cli->cl_chunkbits) + cli->cl_extent_tax;
if (ext->oe_end >= index)
grants = 0;
@ -2333,7 +2374,8 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
/* try to find new extent to cover this page */
LASSERT(!oio->oi_active);
/* we may have allocated grant for this page if we failed
* to expand the previous active extent. */
* to expand the previous active extent.
*/
LASSERT(ergo(grants > 0, grants >= tmp));
rc = 0;
@ -2398,7 +2440,8 @@ int osc_teardown_async_page(const struct lu_env *env,
ext = osc_extent_lookup(obj, oap2cl_page(oap)->cp_index);
/* only truncated pages are allowed to be taken out.
* See osc_extent_truncate() and osc_cache_truncate_start()
* for details. */
* for details.
*/
if (ext && ext->oe_state != OES_TRUNC) {
OSC_EXTENT_DUMP(D_ERROR, ext, "trunc at %lu.\n",
oap2cl_page(oap)->cp_index);
@ -2449,7 +2492,8 @@ int osc_flush_async_page(const struct lu_env *env, struct cl_io *io,
* exists a deadlock problem because other process can wait for
* page writeback bit holding page lock; and meanwhile in
* vvp_page_make_ready(), we need to grab page lock before
* really sending the RPC. */
* really sending the RPC.
*/
case OES_TRUNC:
/* race with truncate, page will be redirtied */
case OES_ACTIVE:
@ -2457,7 +2501,8 @@ int osc_flush_async_page(const struct lu_env *env, struct cl_io *io,
* re-dirty the page. If we continued on here, and we were the
* one making the extent active, we could deadlock waiting for
* the page writeback to clear but it won't because the extent
* is active and won't be written out. */
* is active and won't be written out.
*/
rc = -EAGAIN;
goto out;
default:
@ -2528,7 +2573,8 @@ int osc_cancel_async_page(const struct lu_env *env, struct osc_page *ops)
if (ext->oe_start <= index && ext->oe_end >= index) {
LASSERT(ext->oe_state == OES_LOCK_DONE);
/* For OES_LOCK_DONE state extent, it has already held
* a refcount for RPC. */
* a refcount for RPC.
*/
found = osc_extent_get(ext);
break;
}
@ -2544,7 +2590,8 @@ int osc_cancel_async_page(const struct lu_env *env, struct osc_page *ops)
} else {
osc_object_unlock(obj);
/* ok, it's been put in an rpc. only one oap gets a request
* reference */
* reference
*/
if (oap->oap_request) {
ptlrpc_mark_interrupted(oap->oap_request);
ptlrpcd_wake(oap->oap_request);
@ -2646,7 +2693,8 @@ int osc_cache_truncate_start(const struct lu_env *env, struct osc_io *oio,
/* if ext is in urgent state, it means there must exist
* a page already having been flushed by write_page().
* We have to wait for this extent because we can't
* truncate that page. */
* truncate that page.
*/
LASSERT(!ext->oe_hp);
OSC_EXTENT_DUMP(D_CACHE, ext,
"waiting for busy extent\n");
@ -2661,7 +2709,8 @@ int osc_cache_truncate_start(const struct lu_env *env, struct osc_io *oio,
/* though we grab inode mutex for write path, but we
* release it before releasing extent(in osc_io_end()),
* so there is a race window that an extent is still
* in OES_ACTIVE when truncate starts. */
* in OES_ACTIVE when truncate starts.
*/
LASSERT(!ext->oe_trunc_pending);
ext->oe_trunc_pending = 1;
} else {
@ -2686,7 +2735,8 @@ int osc_cache_truncate_start(const struct lu_env *env, struct osc_io *oio,
list_del_init(&ext->oe_link);
/* extent may be in OES_ACTIVE state because inode mutex
* is released before osc_io_end() in file write case */
* is released before osc_io_end() in file write case
*/
if (ext->oe_state != OES_TRUNC)
osc_extent_wait(env, ext, OES_TRUNC);
@ -2711,7 +2761,8 @@ int osc_cache_truncate_start(const struct lu_env *env, struct osc_io *oio,
/* we need to hold this extent in OES_TRUNC state so
* that no writeback will happen. This is to avoid
* BUG 17397. */
* BUG 17397.
*/
LASSERT(!oio->oi_trunc);
oio->oi_trunc = osc_extent_get(ext);
OSC_EXTENT_DUMP(D_CACHE, ext,
@ -2723,7 +2774,8 @@ int osc_cache_truncate_start(const struct lu_env *env, struct osc_io *oio,
int rc;
/* ignore the result of osc_extent_wait the write initiator
* should take care of it. */
* should take care of it.
*/
rc = osc_extent_wait(env, waiting, OES_INV);
if (rc < 0)
OSC_EXTENT_DUMP(D_CACHE, waiting, "error: %d.\n", rc);
@ -2870,7 +2922,8 @@ int osc_cache_writeback_range(const struct lu_env *env, struct osc_object *obj,
unplug = true;
} else {
/* the only discarder is lock cancelling, so
* [start, end] must contain this extent */
* [start, end] must contain this extent
*/
EASSERT(ext->oe_start >= start &&
ext->oe_max_end <= end, ext);
osc_extent_state_set(ext, OES_LOCKING);
@ -2885,14 +2938,16 @@ int osc_cache_writeback_range(const struct lu_env *env, struct osc_object *obj,
/* It's pretty bad to wait for ACTIVE extents, because
* we don't know how long we will wait for it to be
* flushed since it may be blocked at awaiting more
* grants. We do this for the correctness of fsync. */
* grants. We do this for the correctness of fsync.
*/
LASSERT(hp == 0 && discard == 0);
ext->oe_urgent = 1;
break;
case OES_TRUNC:
/* this extent is being truncated, can't do anything
* for it now. it will be set to urgent after truncate
* is finished in osc_cache_truncate_end(). */
* is finished in osc_cache_truncate_end().
*/
default:
break;
}
@ -2911,7 +2966,8 @@ int osc_cache_writeback_range(const struct lu_env *env, struct osc_object *obj,
EASSERT(ext->oe_state == OES_LOCKING, ext);
/* Discard caching pages. We don't actually write this
* extent out but we complete it as if we did. */
* extent out but we complete it as if we did.
*/
rc = osc_extent_make_ready(env, ext);
if (unlikely(rc < 0)) {
OSC_EXTENT_DUMP(D_ERROR, ext,

33
drivers/staging/lustre/lustre/osc/osc_cl_internal.h
View File

@ -69,10 +69,12 @@ struct osc_io {
/** true if this io is lockless. */
int oi_lockless;
/** active extents, we know how many bytes is going to be written,
* so having an active extent will prevent it from being fragmented */
* so having an active extent will prevent it from being fragmented
*/
struct osc_extent *oi_active;
/** partially truncated extent, we need to hold this extent to prevent
* page writeback from happening. */
* page writeback from happening.
*/
struct osc_extent *oi_trunc;
struct obd_info oi_info;
@ -154,7 +156,8 @@ struct osc_object {
atomic_t oo_nr_writes;
/** Protect extent tree. Will be used to protect
* oo_{read|write}_pages soon. */
* oo_{read|write}_pages soon.
*/
spinlock_t oo_lock;
};
@ -627,22 +630,26 @@ struct osc_extent {
oe_srvlock:1,
oe_memalloc:1,
/** an ACTIVE extent is going to be truncated, so when this extent
* is released, it will turn into TRUNC state instead of CACHE. */
* is released, it will turn into TRUNC state instead of CACHE.
*/
oe_trunc_pending:1,
/** this extent should be written asap and someone may wait for the
* write to finish. This bit is usually set along with urgent if
* the extent was CACHE state.
* fsync_wait extent can't be merged because new extent region may
* exceed fsync range. */
* exceed fsync range.
*/
oe_fsync_wait:1,
/** covering lock is being canceled */
oe_hp:1,
/** this extent should be written back asap. set if one of pages is
* called by page WB daemon, or sync write or reading requests. */
* called by page WB daemon, or sync write or reading requests.
*/
oe_urgent:1;
/** how many grants allocated for this extent.
* Grant allocated for this extent. There is no grant allocated
* for reading extents and sync write extents. */
* for reading extents and sync write extents.
*/
unsigned int oe_grants;
/** # of dirty pages in this extent */
unsigned int oe_nr_pages;
@ -655,21 +662,25 @@ struct osc_extent {
struct osc_page *oe_next_page;
/** start and end index of this extent, include start and end
* themselves. Page offset here is the page index of osc_pages.
* oe_start is used as keyword for red-black tree. */
* oe_start is used as keyword for red-black tree.
*/
pgoff_t oe_start;
pgoff_t oe_end;
/** maximum ending index of this extent, this is limited by
* max_pages_per_rpc, lock extent and chunk size. */
* max_pages_per_rpc, lock extent and chunk size.
*/
pgoff_t oe_max_end;
/** waitqueue - for those who want to be notified if this extent's
* state has changed. */
* state has changed.
*/
wait_queue_head_t oe_waitq;
/** lock covering this extent */
struct cl_lock *oe_osclock;
/** terminator of this extent. Must be true if this extent is in IO. */
struct task_struct *oe_owner;
/** return value of writeback. If somebody is waiting for this extent,
* this value can be known by outside world. */
* this value can be known by outside world.
*/
int oe_rc;
/** max pages per rpc when this extent was created */
unsigned int oe_mppr;

8
drivers/staging/lustre/lustre/osc/osc_internal.h
View File

@ -47,11 +47,13 @@ struct lu_env;
enum async_flags {
ASYNC_READY = 0x1, /* ap_make_ready will not be called before this
page is added to an rpc */
* page is added to an rpc
*/
ASYNC_URGENT = 0x2, /* page must be put into an RPC before return */
ASYNC_COUNT_STABLE = 0x4, /* ap_refresh_count will not be called
to give the caller a chance to update
or cancel the size of the io */
* to give the caller a chance to update
* or cancel the size of the io
*/
ASYNC_HP = 0x10,
};

6
drivers/staging/lustre/lustre/osc/osc_io.c
View File

@ -272,7 +272,8 @@ static int osc_io_prepare_write(const struct lu_env *env,
/* this page contains `invalid' data, but who cares?
* nobody can access the invalid data.
* in osc_io_commit_write(), we're going to write exact
* [from, to) bytes of this page to OST. -jay */
* [from, to) bytes of this page to OST. -jay
*/
cl_page_export(env, slice->cpl_page, 1);
return result;
@ -596,7 +597,8 @@ static int osc_io_fsync_start(const struct lu_env *env,
* send OST_SYNC RPC. This is bad because it causes extents
* to be written osc by osc. However, we usually start
* writeback before CL_FSYNC_ALL so this won't have any real
* problem. */
* problem.
*/
rc = osc_cache_wait_range(env, osc, start, end);
if (result == 0)
result = rc;

45
drivers/staging/lustre/lustre/osc/osc_lock.c
View File

@ -154,7 +154,8 @@ static void osc_lock_detach(const struct lu_env *env, struct osc_lock *olck)
olck->ols_lock = NULL;
/* wb(); --- for all who checks (ols->ols_lock != NULL) before
* call to osc_lock_detach() */
* call to osc_lock_detach()
*/
dlmlock->l_ast_data = NULL;
olck->ols_handle.cookie = 0ULL;
spin_unlock(&osc_ast_guard);
@ -169,7 +170,8 @@ static void osc_lock_detach(const struct lu_env *env, struct osc_lock *olck)
/* Must get the value under the lock to avoid possible races. */
old_kms = cl2osc(obj)->oo_oinfo->loi_kms;
/* Update the kms. Need to loop all granted locks.
* Not a problem for the client */
* Not a problem for the client
*/
attr->cat_kms = ldlm_extent_shift_kms(dlmlock, old_kms);
cl_object_attr_set(env, obj, attr, CAT_KMS);
@ -362,7 +364,8 @@ static void osc_lock_lvb_update(const struct lu_env *env, struct osc_lock *olck,
*lvb = *(struct ost_lvb *)dlmlock->l_lvb_data;
size = lvb->lvb_size;
/* Extend KMS up to the end of this lock and no further
* A lock on [x,y] means a KMS of up to y + 1 bytes! */
* A lock on [x,y] means a KMS of up to y + 1 bytes!
*/
if (size > dlmlock->l_policy_data.l_extent.end)
size = dlmlock->l_policy_data.l_extent.end + 1;
if (size >= oinfo->loi_kms) {
@ -426,7 +429,8 @@ static void osc_lock_granted(const struct lu_env *env, struct osc_lock *olck,
* to take a semaphore on a parent lock. This is safe, because
* spin-locks are needed to protect consistency of
* dlmlock->l_*_mode and LVB, and we have finished processing
* them. */
* them.
*/
unlock_res_and_lock(dlmlock);
cl_lock_modify(env, lock, descr);
cl_lock_signal(env, lock);
@ -467,7 +471,8 @@ static void osc_lock_upcall0(const struct lu_env *env, struct osc_lock *olck)
olck->ols_hold = 1;
/* lock reference taken by ldlm_handle2lock_long() is owned by
* osc_lock and released in osc_lock_detach() */
* osc_lock and released in osc_lock_detach()
*/
lu_ref_add(&dlmlock->l_reference, "osc_lock", olck);
olck->ols_has_ref = 1;
}
@ -545,7 +550,8 @@ static int osc_lock_upcall(void *cookie, int errcode)
/* For AGL case, the RPC sponsor may exits the cl_lock
* processing without wait() called before related OSC
* lock upcall(). So update the lock status according
* to the enqueue result inside AGL upcall(). */
* to the enqueue result inside AGL upcall().
*/
if (olck->ols_agl) {
lock->cll_flags |= CLF_FROM_UPCALL;
cl_wait_try(env, lock);
@ -568,7 +574,8 @@ static int osc_lock_upcall(void *cookie, int errcode)
lu_ref_del(&lock->cll_reference, "upcall", lock);
/* This maybe the last reference, so must be called after
* cl_lock_mutex_put(). */
* cl_lock_mutex_put().
*/
cl_lock_put(env, lock);
cl_env_nested_put(&nest, env);
@ -854,7 +861,8 @@ static int osc_ldlm_glimpse_ast(struct ldlm_lock *dlmlock, void *data)
* BTW, it's okay for cl_lock to be cancelled during
* this period because server can handle this race.
* See ldlm_server_glimpse_ast() for details.
* cl_lock_mutex_get(env, lock); */
* cl_lock_mutex_get(env, lock);
*/
cap = &req->rq_pill;
req_capsule_extend(cap, &RQF_LDLM_GL_CALLBACK);
req_capsule_set_size(cap, &RMF_DLM_LVB, RCL_SERVER,
@ -1014,7 +1022,8 @@ static int osc_lock_enqueue_wait(const struct lu_env *env,
LASSERT(cl_lock_is_mutexed(lock));
/* make it enqueue anyway for glimpse lock, because we actually
* don't need to cancel any conflicting locks. */
* don't need to cancel any conflicting locks.
*/
if (olck->ols_glimpse)
return 0;
@ -1048,7 +1057,8 @@ static int osc_lock_enqueue_wait(const struct lu_env *env,
* imagine that client has PR lock on [0, 1000], and thread T0
* is doing lockless IO in [500, 1500] region. Concurrent
* thread T1 can see lockless data in [500, 1000], which is
* wrong, because these data are possibly stale. */
* wrong, because these data are possibly stale.
*/
if (!lockless && osc_lock_compatible(olck, scan_ols))
continue;
@ -1120,7 +1130,8 @@ static int osc_lock_enqueue(const struct lu_env *env,
struct ldlm_enqueue_info *einfo = &ols->ols_einfo;
/* lock will be passed as upcall cookie,
* hold ref to prevent to be released. */
* hold ref to prevent to be released.
*/
cl_lock_hold_add(env, lock, "upcall", lock);
/* a user for lock also */
cl_lock_user_add(env, lock);
@ -1171,7 +1182,8 @@ static int osc_lock_wait(const struct lu_env *env,
} else if (olck->ols_agl) {
if (lock->cll_flags & CLF_FROM_UPCALL)
/* It is from enqueue RPC reply upcall for
* updating state. Do not re-enqueue. */
* updating state. Do not re-enqueue.
*/
return -ENAVAIL;
olck->ols_state = OLS_NEW;
} else {
@ -1232,7 +1244,8 @@ static int osc_lock_use(const struct lu_env *env,
LASSERT(lock->cll_state == CLS_INTRANSIT);
LASSERT(lock->cll_users > 0);
/* set a flag for osc_dlm_blocking_ast0() to signal the
* lock.*/
* lock.
*/
olck->ols_ast_wait = 1;
rc = CLO_WAIT;
}
@ -1315,7 +1328,8 @@ static void osc_lock_cancel(const struct lu_env *env,
/* Now that we're the only user of dlm read/write reference,
* mostly the ->l_readers + ->l_writers should be zero.
* However, there is a corner case.
* See bug 18829 for details.*/
* See bug 18829 for details.
*/
do_cancel = (dlmlock->l_readers == 0 &&
dlmlock->l_writers == 0);
dlmlock->l_flags |= LDLM_FL_CBPENDING;
@ -1514,7 +1528,8 @@ static void osc_lock_lockless_state(const struct lu_env *env,
lock->ols_owner = oio;
/* set the io to be lockless if this lock is for io's
* host object */
* host object
*/
if (cl_object_same(oio->oi_cl.cis_obj, slice->cls_obj))
oio->oi_lockless = 1;
}

42
drivers/staging/lustre/lustre/osc/osc_page.c
View File

@ -105,7 +105,8 @@ static void osc_page_transfer_add(const struct lu_env *env,
struct osc_object *obj = cl2osc(opg->ops_cl.cpl_obj);
/* ops_lru and ops_inflight share the same field, so take it from LRU
* first and then use it as inflight. */
* first and then use it as inflight.
*/
osc_lru_del(osc_cli(obj), opg, false);
spin_lock(&obj->oo_seatbelt);
@ -133,7 +134,8 @@ static int osc_page_cache_add(const struct lu_env *env,
/* for sync write, kernel will wait for this page to be flushed before
* osc_io_end() is called, so release it earlier.
* for mkwrite(), it's known there is no further pages. */
* for mkwrite(), it's known there is no further pages.
*/
if (cl_io_is_sync_write(io) || cl_io_is_mkwrite(io)) {
if (oio->oi_active) {
osc_extent_release(env, oio->oi_active);
@ -359,7 +361,8 @@ static int osc_page_cancel(const struct lu_env *env,
LINVRNT(osc_page_protected(env, opg, CLM_READ, 0));
/* Check if the transferring against this page
* is completed, or not even queued. */
* is completed, or not even queued.
*/
if (opg->ops_transfer_pinned)
/* FIXME: may not be interrupted.. */
rc = osc_cancel_async_page(env, opg);
@ -423,7 +426,8 @@ int osc_page_init(const struct lu_env *env, struct cl_object *obj,
* creates temporary pages outside of a lock.
*/
/* ops_inflight and ops_lru are the same field, but it doesn't
* hurt to initialize it twice :-) */
* hurt to initialize it twice :-)
*/
INIT_LIST_HEAD(&opg->ops_inflight);
INIT_LIST_HEAD(&opg->ops_lru);
@ -482,7 +486,8 @@ void osc_page_submit(const struct lu_env *env, struct osc_page *opg,
static DECLARE_WAIT_QUEUE_HEAD(osc_lru_waitq);
static atomic_t osc_lru_waiters = ATOMIC_INIT(0);
/* LRU pages are freed in batch mode. OSC should at least free this
* number of pages to avoid running out of LRU budget, and.. */
* number of pages to avoid running out of LRU budget, and..
*/
static const int lru_shrink_min = 2 << (20 - PAGE_CACHE_SHIFT); /* 2M */
/* free this number at most otherwise it will take too long time to finish. */
static const int lru_shrink_max = 32 << (20 - PAGE_CACHE_SHIFT); /* 32M */
@ -491,7 +496,8 @@ static const int lru_shrink_max = 32 << (20 - PAGE_CACHE_SHIFT); /* 32M */
* we should free slots aggressively. In this way, slots are freed in a steady
* step to maintain fairness among OSCs.
*
* Return how many LRU pages should be freed. */
* Return how many LRU pages should be freed.
*/
static int osc_cache_too_much(struct client_obd *cli)
{
struct cl_client_cache *cache = cli->cl_cache;
@ -503,7 +509,8 @@ static int osc_cache_too_much(struct client_obd *cli)
return min(pages, lru_shrink_max);
/* if it's going to run out LRU slots, we should free some, but not
* too much to maintain fairness among OSCs. */
* too much to maintain fairness among OSCs.
*/
if (atomic_read(cli->cl_lru_left) < cache->ccc_lru_max >> 4) {
unsigned long tmp;
@ -531,7 +538,8 @@ static int discard_pagevec(const struct lu_env *env, struct cl_io *io,
/* free LRU page only if nobody is using it.
* This check is necessary to avoid freeing the pages
* having already been removed from LRU and pinned
* for IO. */
* for IO.
*/
if (!cl_page_in_use(page)) {
cl_page_unmap(env, io, page);
cl_page_discard(env, io, page);
@ -621,11 +629,13 @@ int osc_lru_shrink(struct client_obd *cli, int target)
/* move this page to the end of list as it will be discarded
* soon. The page will be finally removed from LRU list in
* osc_page_delete(). */
* osc_page_delete().
*/
list_move_tail(&opg->ops_lru, &cli->cl_lru_list);
/* it's okay to grab a refcount here w/o holding lock because
* it has to grab cl_lru_list_lock to delete the page. */
* it has to grab cl_lru_list_lock to delete the page.
*/
cl_page_get(page);
pvec[index++] = page;
if (++count >= target)
@ -676,7 +686,8 @@ static void osc_lru_add(struct client_obd *cli, struct osc_page *opg)
}
/* delete page from LRUlist. The page can be deleted from LRUlist for two
* reasons: redirtied or deleted from page cache. */
* reasons: redirtied or deleted from page cache.
*/
static void osc_lru_del(struct client_obd *cli, struct osc_page *opg, bool del)
{
if (opg->ops_in_lru) {
@ -698,7 +709,8 @@ static void osc_lru_del(struct client_obd *cli, struct osc_page *opg, bool del)
* this osc occupies too many LRU pages and kernel is
* stealing one of them.
* cl_lru_shrinkers is to avoid recursive call in case
* we're already in the context of osc_lru_shrink(). */
* we're already in the context of osc_lru_shrink().
*/
if (atomic_read(&cli->cl_lru_shrinkers) == 0 &&
!memory_pressure_get())
osc_lru_shrink(cli, osc_cache_too_much(cli));
@ -735,7 +747,8 @@ static int osc_lru_reclaim(struct client_obd *cli)
atomic_read(&cli->cl_lru_busy));
/* Reclaim LRU slots from other client_obd as it can't free enough
* from its own. This should rarely happen. */
* from its own. This should rarely happen.
*/
spin_lock(&cache->ccc_lru_lock);
LASSERT(!list_empty(&cache->ccc_lru));
@ -793,7 +806,8 @@ static int osc_lru_reserve(const struct lu_env *env, struct osc_object *obj,
cond_resched();
/* slowest case, all of caching pages are busy, notifying
* other OSCs that we're lack of LRU slots. */
* other OSCs that we're lack of LRU slots.
*/
atomic_inc(&osc_lru_waiters);
gen = atomic_read(&cli->cl_lru_in_list);

16
drivers/staging/lustre/lustre/osc/osc_quota.c
View File

@ -47,10 +47,12 @@ int osc_quota_chkdq(struct client_obd *cli, const unsigned int qid[])
oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
if (oqi) {
/* do not try to access oqi here, it could have been
* freed by osc_quota_setdq() */
* freed by osc_quota_setdq()
*/
/* the slot is busy, the user is about to run out of
* quota space on this OST */
* quota space on this OST
*/
CDEBUG(D_QUOTA, "chkdq found noquota for %s %d\n",
type == USRQUOTA ? "user" : "grout", qid[type]);
return NO_QUOTA;
@ -84,7 +86,8 @@ int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
oqi = cfs_hash_lookup(cli->cl_quota_hash[type], &qid[type]);
if ((flags & FL_QUOTA_FLAG(type)) != 0) {
/* This ID is getting close to its quota limit, let's
* switch to sync I/O */
* switch to sync I/O
*/
if (oqi)
continue;
@ -108,7 +111,8 @@ int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
qid[type], rc);
} else {
/* This ID is now off the hook, let's remove it from
* the hash table */
* the hash table
*/
if (!oqi)
continue;
@ -297,8 +301,8 @@ int osc_quotacheck(struct obd_device *unused, struct obd_export *exp,
ptlrpc_request_set_replen(req);
/* the next poll will find -ENODATA, that means quotacheck is
* going on */
/* the next poll will find -ENODATA, that means quotacheck is going on
*/
cli->cl_qchk_stat = -ENODATA;
rc = ptlrpc_queue_wait(req);
if (rc)

151
drivers/staging/lustre/lustre/osc/osc_request.c
View File

@ -628,7 +628,8 @@ int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
/* Find and cancel locally locks matched by @mode in the resource found by
* @objid. Found locks are added into @cancel list. Returns the amount of
* locks added to @cancels list. */
* locks added to @cancels list.
*/
static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
struct list_head *cancels,
enum ldlm_mode mode, __u64 lock_flags)
@ -643,7 +644,8 @@ static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
*
* This distinguishes from a case when ELC is not supported originally,
* when we still want to cancel locks in advance and just cancel them
* locally, without sending any RPC. */
* locally, without sending any RPC.
*/
if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
return 0;
@ -722,7 +724,8 @@ static int osc_create(const struct lu_env *env, struct obd_export *exp,
* If the client dies, or the OST is down when the object should be destroyed,
* the records are not cancelled, and when the OST reconnects to the MDS next,
* it will retrieve the llog unlink logs and then sends the log cancellation
* cookies to the MDS after committing destroy transactions. */
* cookies to the MDS after committing destroy transactions.
*/
static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
struct obdo *oa, struct lov_stripe_md *ea,
struct obd_trans_info *oti, struct obd_export *md_export)
@ -768,7 +771,8 @@ static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
/* If osc_destroy is for destroying the unlink orphan,
* sent from MDT to OST, which should not be blocked here,
* because the process might be triggered by ptlrpcd, and
* it is not good to block ptlrpcd thread (b=16006)*/
* it is not good to block ptlrpcd thread (b=16006
**/
if (!(oa->o_flags & OBD_FL_DELORPHAN)) {
req->rq_interpret_reply = osc_destroy_interpret;
if (!osc_can_send_destroy(cli)) {
@ -809,7 +813,8 @@ static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
(long)(obd_max_dirty_pages + 1))) {
/* The atomic_read() allowing the atomic_inc() are
* not covered by a lock thus they may safely race and trip
* this CERROR() unless we add in a small fudge factor (+1). */
* this CERROR() unless we add in a small fudge factor (+1).
*/
CERROR("dirty %d - %d > system dirty_max %d\n",
atomic_read(&obd_dirty_pages),
atomic_read(&obd_dirty_transit_pages),
@ -899,7 +904,8 @@ static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
/* Shrink the current grant, either from some large amount to enough for a
* full set of in-flight RPCs, or if we have already shrunk to that limit
* then to enough for a single RPC. This avoids keeping more grant than
* needed, and avoids shrinking the grant piecemeal. */
* needed, and avoids shrinking the grant piecemeal.
*/
static int osc_shrink_grant(struct client_obd *cli)
{
__u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
@ -921,7 +927,8 @@ int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
client_obd_list_lock(&cli->cl_loi_list_lock);
/* Don't shrink if we are already above or below the desired limit
* We don't want to shrink below a single RPC, as that will negatively
* impact block allocation and long-term performance. */
* impact block allocation and long-term performance.
*/
if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT)
target_bytes = cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
@ -969,7 +976,8 @@ static int osc_should_shrink_grant(struct client_obd *client)
if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
/* Get the current RPC size directly, instead of going via:
* cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
* Keep comment here so that it can be found by searching. */
* Keep comment here so that it can be found by searching.
*/
int brw_size = client->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
@ -1039,7 +1047,8 @@ static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
cli->cl_import->imp_obd->obd_name, cli->cl_avail_grant,
ocd->ocd_grant, cli->cl_dirty);
/* workaround for servers which do not have the patch from
* LU-2679 */
* LU-2679
*/
cli->cl_avail_grant = ocd->ocd_grant;
}
@ -1059,7 +1068,8 @@ static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
/* We assume that the reason this OSC got a short read is because it read
* beyond the end of a stripe file; i.e. lustre is reading a sparse file
* via the LOV, and it _knows_ it's reading inside the file, it's just that
* this stripe never got written at or beyond this stripe offset yet. */
* this stripe never got written at or beyond this stripe offset yet.
*/
static void handle_short_read(int nob_read, u32 page_count,
struct brw_page **pga)
{
@ -1138,7 +1148,8 @@ static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
OBD_BRW_SYNC | OBD_BRW_ASYNC|OBD_BRW_NOQUOTA);
/* warn if we try to combine flags that we don't know to be
* safe to combine */
* safe to combine
*/
if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
CWARN("Saw flags 0x%x and 0x%x in the same brw, please report this at http://bugs.whamcloud.com/\n",
p1->flag, p2->flag);
@ -1173,7 +1184,8 @@ static u32 osc_checksum_bulk(int nob, u32 pg_count,
int count = pga[i]->count > nob ? nob : pga[i]->count;
/* corrupt the data before we compute the checksum, to
* simulate an OST->client data error */
* simulate an OST->client data error
*/
if (i == 0 && opc == OST_READ &&
OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
unsigned char *ptr = kmap(pga[i]->pg);
@ -1204,7 +1216,8 @@ static u32 osc_checksum_bulk(int nob, u32 pg_count,
cfs_crypto_hash_final(hdesc, NULL, NULL);
/* For sending we only compute the wrong checksum instead
* of corrupting the data so it is still correct on a redo */
* of corrupting the data so it is still correct on a redo
*/
if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
cksum++;
@ -1265,7 +1278,8 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,
req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
ptlrpc_at_set_req_timeout(req);
/* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
* retry logic */
* retry logic
*/
req->rq_no_retry_einprogress = 1;
desc = ptlrpc_prep_bulk_imp(req, page_count,
@ -1292,7 +1306,8 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,
* that might be send for this request. The actual number is decided
* when the RPC is finally sent in ptlrpc_register_bulk(). It sends
* "max - 1" for old client compatibility sending "0", and also so the
* the actual maximum is a power-of-two number, not one less. LU-1431 */
* the actual maximum is a power-of-two number, not one less. LU-1431
*/
ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
LASSERT(page_count > 0);
pg_prev = pga[0];
@ -1354,7 +1369,8 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,
if (cli->cl_checksum &&
!sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
/* store cl_cksum_type in a local variable since
* it can be changed via lprocfs */
* it can be changed via lprocfs
*/
enum cksum_type cksum_type = cli->cl_cksum_type;
if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
@ -1374,7 +1390,8 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,
oa->o_flags |= cksum_type_pack(cksum_type);
} else {
/* clear out the checksum flag, in case this is a
* resend but cl_checksum is no longer set. b=11238 */
* resend but cl_checksum is no longer set. b=11238
*/
oa->o_valid &= ~OBD_MD_FLCKSUM;
}
oa->o_cksum = body->oa.o_cksum;
@ -1637,12 +1654,14 @@ static int osc_brw_redo_request(struct ptlrpc_request *request,
}
}
/* New request takes over pga and oaps from old request.
* Note that copying a list_head doesn't work, need to move it... */
* Note that copying a list_head doesn't work, need to move it...
*/
aa->aa_resends++;
new_req->rq_interpret_reply = request->rq_interpret_reply;
new_req->rq_async_args = request->rq_async_args;
/* cap resend delay to the current request timeout, this is similar to
* what ptlrpc does (see after_reply()) */
* what ptlrpc does (see after_reply())
*/
if (aa->aa_resends > new_req->rq_timeout)
new_req->rq_sent = ktime_get_real_seconds() + new_req->rq_timeout;
else
@ -1668,7 +1687,8 @@ static int osc_brw_redo_request(struct ptlrpc_request *request,
/* XXX: This code will run into problem if we're going to support
* to add a series of BRW RPCs into a self-defined ptlrpc_request_set
* and wait for all of them to be finished. We should inherit request
* set from old request. */
* set from old request.
*/
ptlrpcd_add_req(new_req);
DEBUG_REQ(D_INFO, new_req, "new request");
@ -1724,7 +1744,8 @@ static int brw_interpret(const struct lu_env *env,
rc = osc_brw_fini_request(req, rc);
CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
/* When server return -EINPROGRESS, client should always retry
* regardless of the number of times the bulk was resent already. */
* regardless of the number of times the bulk was resent already.
*/
if (osc_recoverable_error(rc)) {
if (req->rq_import_generation !=
req->rq_import->imp_generation) {
@ -1797,7 +1818,8 @@ static int brw_interpret(const struct lu_env *env,
client_obd_list_lock(&cli->cl_loi_list_lock);
/* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
* is called so we know whether to go to sync BRWs or wait for more
* RPCs to complete */
* RPCs to complete
*/
if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
cli->cl_w_in_flight--;
else
@ -1937,7 +1959,8 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
* we race with setattr (locally or in queue at OST). If OST gets
* later setattr before earlier BRW (as determined by the request xid),
* the OST will not use BRW timestamps. Sadly, there is no obvious
* way to do this in a single call. bug 10150 */
* way to do this in a single call. bug 10150
*/
body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
crattr->cra_oa = &body->oa;
cl_req_attr_set(env, clerq, crattr,
@ -1954,7 +1977,8 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
aa->aa_clerq = clerq;
/* queued sync pages can be torn down while the pages
* were between the pending list and the rpc */
* were between the pending list and the rpc
*/
tmp = NULL;
list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
/* only one oap gets a request reference */
@ -2006,7 +2030,8 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
kmem_cache_free(obdo_cachep, oa);
kfree(pga);
/* this should happen rarely and is pretty bad, it makes the
* pending list not follow the dirty order */
* pending list not follow the dirty order
*/
while (!list_empty(ext_list)) {
ext = list_entry(ext_list->next, struct osc_extent,
oe_link);
@ -2062,7 +2087,8 @@ static int osc_set_data_with_check(struct lustre_handle *lockh,
/* find any ldlm lock of the inode in osc
* return 0 not find
* 1 find one
* < 0 error */
* < 0 error
*/
static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
ldlm_iterator_t replace, void *data)
{
@ -2124,18 +2150,21 @@ static int osc_enqueue_interpret(const struct lu_env *env,
__u64 *flags = aa->oa_flags;
/* Make a local copy of a lock handle and a mode, because aa->oa_*
* might be freed anytime after lock upcall has been called. */
* might be freed anytime after lock upcall has been called.
*/
lustre_handle_copy(&handle, aa->oa_lockh);
mode = aa->oa_ei->ei_mode;
/* ldlm_cli_enqueue is holding a reference on the lock, so it must
* be valid. */
* be valid.
*/
lock = ldlm_handle2lock(&handle);
/* Take an additional reference so that a blocking AST that
* ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
* to arrive after an upcall has been executed by
* osc_enqueue_fini(). */
* osc_enqueue_fini().
*/
ldlm_lock_addref(&handle, mode);
/* Let CP AST to grant the lock first. */
@ -2182,7 +2211,8 @@ struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
* others may take a considerable amount of time in a case of ost failure; and
* when other sync requests do not get released lock from a client, the client
* is excluded from the cluster -- such scenarious make the life difficult, so
* release locks just after they are obtained. */
* release locks just after they are obtained.
*/
int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
__u64 *flags, ldlm_policy_data_t *policy,
struct ost_lvb *lvb, int kms_valid,
@ -2199,7 +2229,8 @@ int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
int rc;
/* Filesystem lock extents are extended to page boundaries so that
* dealing with the page cache is a little smoother. */
* dealing with the page cache is a little smoother.
*/
policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
policy->l_extent.end |= ~CFS_PAGE_MASK;
@ -2223,7 +2254,8 @@ int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
*
* At some point we should cancel the read lock instead of making them
* send us a blocking callback, but there are problems with canceling
* locks out from other users right now, too. */
* locks out from other users right now, too.
*/
mode = einfo->ei_mode;
if (einfo->ei_mode == LCK_PR)
mode |= LCK_PW;
@ -2235,7 +2267,8 @@ int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
if ((agl != 0) && !(matched->l_flags & LDLM_FL_LVB_READY)) {
/* For AGL, if enqueue RPC is sent but the lock is not
* granted, then skip to process this strpe.
* Return -ECANCELED to tell the caller. */
* Return -ECANCELED to tell the caller.
*/
ldlm_lock_decref(lockh, mode);
LDLM_LOCK_PUT(matched);
return -ECANCELED;
@ -2244,19 +2277,22 @@ int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
if (osc_set_lock_data_with_check(matched, einfo)) {
*flags |= LDLM_FL_LVB_READY;
/* addref the lock only if not async requests and PW
* lock is matched whereas we asked for PR. */
* lock is matched whereas we asked for PR.
*/
if (!rqset && einfo->ei_mode != mode)
ldlm_lock_addref(lockh, LCK_PR);
if (intent) {
/* I would like to be able to ASSERT here that
* rss <= kms, but I can't, for reasons which
* are explained in lov_enqueue() */
* are explained in lov_enqueue()
*/
}
/* We already have a lock, and it's referenced.
*
* At this point, the cl_lock::cll_state is CLS_QUEUING,
* AGL upcall may change it to CLS_HELD directly. */
* AGL upcall may change it to CLS_HELD directly.
*/
(*upcall)(cookie, ELDLM_OK);
if (einfo->ei_mode != mode)
@ -2344,14 +2380,16 @@ int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
return -EIO;
/* Filesystem lock extents are extended to page boundaries so that
* dealing with the page cache is a little smoother */
* dealing with the page cache is a little smoother
*/
policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
policy->l_extent.end |= ~CFS_PAGE_MASK;
/* Next, search for already existing extent locks that will cover us */
/* If we're trying to read, we also search for an existing PW lock. The
* VFS and page cache already protect us locally, so lots of readers/
* writers can share a single PW lock. */
* writers can share a single PW lock.
*/
rc = mode;
if (mode == LCK_PR)
rc |= LCK_PW;
@ -2395,7 +2433,8 @@ static int osc_statfs_interpret(const struct lu_env *env,
* due to issues at a higher level (LOV).
* Exit immediately since the caller is
* aware of the problem and takes care
* of the clean up */
* of the clean up
*/
return rc;
if ((rc == -ENOTCONN || rc == -EAGAIN) &&
@ -2433,7 +2472,8 @@ static int osc_statfs_async(struct obd_export *exp,
* extra calls into the filesystem if that isn't necessary (e.g.
* during mount that would help a bit). Having relative timestamps
* is not so great if request processing is slow, while absolute
* timestamps are not ideal because they need time synchronization. */
* timestamps are not ideal because they need time synchronization.
*/
req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
if (!req)
return -ENOMEM;
@ -2471,8 +2511,9 @@ static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
struct obd_import *imp = NULL;
int rc;
/*Since the request might also come from lprocfs, so we need
*sync this with client_disconnect_export Bug15684*/
/* Since the request might also come from lprocfs, so we need
* sync this with client_disconnect_export Bug15684
*/
down_read(&obd->u.cli.cl_sem);
if (obd->u.cli.cl_import)
imp = class_import_get(obd->u.cli.cl_import);
@ -2485,7 +2526,8 @@ static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
* extra calls into the filesystem if that isn't necessary (e.g.
* during mount that would help a bit). Having relative timestamps
* is not so great if request processing is slow, while absolute
* timestamps are not ideal because they need time synchronization. */
* timestamps are not ideal because they need time synchronization.
*/
req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
class_import_put(imp);
@ -2543,7 +2585,8 @@ static int osc_getstripe(struct lov_stripe_md *lsm,
return -ENODATA;
/* we only need the header part from user space to get lmm_magic and
* lmm_stripe_count, (the header part is common to v1 and v3) */
* lmm_stripe_count, (the header part is common to v1 and v3)
*/
lum_size = sizeof(struct lov_user_md_v1);
if (copy_from_user(&lum, lump, lum_size))
return -EFAULT;
@ -2558,7 +2601,8 @@ static int osc_getstripe(struct lov_stripe_md *lsm,
LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
/* we can use lov_mds_md_size() to compute lum_size
* because lov_user_md_vX and lov_mds_md_vX have the same size */
* because lov_user_md_vX and lov_mds_md_vX have the same size
*/
if (lum.lmm_stripe_count > 0) {
lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
lumk = kzalloc(lum_size, GFP_NOFS);
@ -2878,11 +2922,12 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
return -EINVAL;
/* We pass all other commands directly to OST. Since nobody calls osc
methods directly and everybody is supposed to go through LOV, we
assume lov checked invalid values for us.
The only recognised values so far are evict_by_nid and mds_conn.
Even if something bad goes through, we'd get a -EINVAL from OST
anyway. */
* methods directly and everybody is supposed to go through LOV, we
* assume lov checked invalid values for us.
* The only recognised values so far are evict_by_nid and mds_conn.
* Even if something bad goes through, we'd get a -EINVAL from OST
* anyway.
*/
req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
&RQF_OST_SET_GRANT_INFO :
@ -3022,7 +3067,8 @@ static int osc_import_event(struct obd_device *obd,
/* Reset grants */
cli = &obd->u.cli;
/* all pages go to failing rpcs due to the invalid
* import */
* import
*/
osc_io_unplug(env, cli, NULL);
ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
@ -3296,7 +3342,8 @@ static int __init osc_init(void)
/* print an address of _any_ initialized kernel symbol from this
* module, to allow debugging with gdb that doesn't support data
* symbols from modules.*/
* symbols from modules.
*/
CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
rc = lu_kmem_init(osc_caches);