*/
int (*cpo_is_under_lock)(const struct lu_env *env,
const struct cl_page_slice *slice,
- struct cl_io *io);
+ struct cl_io *io, pgoff_t *max);
/**
* Optional debugging helper. Prints given page slice.
}
void cl_page_slice_add(struct cl_page *page, struct cl_page_slice *slice,
- struct cl_object *obj,
+ struct cl_object *obj, pgoff_t index,
const struct cl_page_operations *ops);
void cl_lock_slice_add(struct cl_lock *lock, struct cl_lock_slice *slice,
struct cl_object *obj,
int cl_page_is_vmlocked(const struct lu_env *env, const struct cl_page *pg);
void cl_page_export(const struct lu_env *env, struct cl_page *pg, int uptodate);
int cl_page_is_under_lock(const struct lu_env *env, struct cl_io *io,
- struct cl_page *page);
+ struct cl_page *page, pgoff_t *max_index);
loff_t cl_offset(const struct cl_object *obj, pgoff_t idx);
pgoff_t cl_index(const struct cl_object *obj, loff_t offset);
int cl_page_size(const struct cl_object *obj);
const struct cl_lock_operations *lkops);
int ccc_object_glimpse(const struct lu_env *env,
const struct cl_object *obj, struct ost_lvb *lvb);
-int ccc_page_is_under_lock(const struct lu_env *env,
- const struct cl_page_slice *slice, struct cl_io *io);
int ccc_fail(const struct lu_env *env, const struct cl_page_slice *slice);
int ccc_transient_page_prep(const struct lu_env *env,
const struct cl_page_slice *slice,
*
*/
-int ccc_page_is_under_lock(const struct lu_env *env,
- const struct cl_page_slice *slice,
- struct cl_io *io)
-{
- struct ccc_io *cio = ccc_env_io(env);
- struct cl_lock_descr *desc = &ccc_env_info(env)->cti_descr;
- struct cl_page *page = slice->cpl_page;
-
- int result;
-
- if (io->ci_type == CIT_READ || io->ci_type == CIT_WRITE ||
- io->ci_type == CIT_FAULT) {
- if (cio->cui_fd->fd_flags & LL_FILE_GROUP_LOCKED) {
- result = -EBUSY;
- } else {
- desc->cld_start = ccc_index(cl2ccc_page(slice));
- desc->cld_end = ccc_index(cl2ccc_page(slice));
- desc->cld_obj = page->cp_obj;
- desc->cld_mode = CLM_READ;
- result = cl_queue_match(&io->ci_lockset.cls_done,
- desc) ? -EBUSY : 0;
- }
- } else {
- result = 0;
- }
- return result;
-}
-
int ccc_fail(const struct lu_env *env, const struct cl_page_slice *slice)
{
/*
RA_STAT_EOF,
RA_STAT_MAX_IN_FLIGHT,
RA_STAT_WRONG_GRAB_PAGE,
+ RA_STAT_FAILED_REACH_END,
_NR_RA_STAT,
};
int ll_readpage(struct file *file, struct page *page);
void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras);
int ll_readahead(const struct lu_env *env, struct cl_io *io,
- struct ll_readahead_state *ras, struct address_space *mapping,
- struct cl_page_list *queue, int flags);
+ struct cl_page_list *queue, struct ll_readahead_state *ras,
+ bool hit);
int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io);
struct ll_cl_context *ll_cl_init(struct file *file, struct page *vmpage);
void ll_cl_fini(struct ll_cl_context *lcc);
struct ll_readahead_state *ras, unsigned long index,
unsigned hit);
void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len);
-void ll_ra_stats_inc(struct address_space *mapping, enum ra_stat which);
+void ll_ra_stats_inc(struct inode *inode, enum ra_stat which);
/* llite/llite_rmtacl.c */
#ifdef CONFIG_FS_POSIX_ACL
[RA_STAT_EOF] = "read-ahead to EOF",
[RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
[RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
+ [RA_STAT_FAILED_REACH_END] = "failed to reach end"
};
int ldebugfs_register_mountpoint(struct dentry *parent,
*/
static unsigned long ll_ra_count_get(struct ll_sb_info *sbi,
struct ra_io_arg *ria,
- unsigned long pages)
+ unsigned long pages, unsigned long min)
{
struct ll_ra_info *ra = &sbi->ll_ra_info;
long ret;
}
out:
+ if (ret < min) {
+ /* override ra limit for maximum performance */
+ atomic_add(min - ret, &ra->ra_cur_pages);
+ ret = min;
+ }
return ret;
}
lprocfs_counter_incr(sbi->ll_ra_stats, which);
}
-void ll_ra_stats_inc(struct address_space *mapping, enum ra_stat which)
+void ll_ra_stats_inc(struct inode *inode, enum ra_stat which)
{
- struct ll_sb_info *sbi = ll_i2sbi(mapping->host);
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
ll_ra_stats_inc_sbi(sbi, which);
}
static int cl_read_ahead_page(const struct lu_env *env, struct cl_io *io,
struct cl_page_list *queue, struct cl_page *page,
- struct cl_object *clob)
+ struct cl_object *clob, pgoff_t *max_index)
{
struct page *vmpage = page->cp_vmpage;
struct ccc_page *cp;
lu_ref_add(&page->cp_reference, "ra", current);
cp = cl2ccc_page(cl_object_page_slice(clob, page));
if (!cp->cpg_defer_uptodate && !PageUptodate(vmpage)) {
- rc = cl_page_is_under_lock(env, io, page);
- if (rc == -EBUSY) {
+ CDEBUG(D_READA, "page index %lu, max_index: %lu\n",
+ ccc_index(cp), *max_index);
+ if (*max_index == 0 || ccc_index(cp) > *max_index)
+ rc = cl_page_is_under_lock(env, io, page, max_index);
+ if (rc == 0) {
cp->cpg_defer_uptodate = 1;
cp->cpg_ra_used = 0;
cl_page_list_add(queue, page);
*/
static int ll_read_ahead_page(const struct lu_env *env, struct cl_io *io,
struct cl_page_list *queue,
- pgoff_t index, struct address_space *mapping)
+ pgoff_t index, pgoff_t *max_index)
{
+ struct cl_object *clob = io->ci_obj;
+ struct inode *inode = ccc_object_inode(clob);
struct page *vmpage;
- struct cl_object *clob = ll_i2info(mapping->host)->lli_clob;
struct cl_page *page;
enum ra_stat which = _NR_RA_STAT; /* keep gcc happy */
int rc = 0;
const char *msg = NULL;
- vmpage = grab_cache_page_nowait(mapping, index);
+ vmpage = grab_cache_page_nowait(inode->i_mapping, index);
if (vmpage) {
/* Check if vmpage was truncated or reclaimed */
- if (vmpage->mapping == mapping) {
+ if (vmpage->mapping == inode->i_mapping) {
page = cl_page_find(env, clob, vmpage->index,
vmpage, CPT_CACHEABLE);
if (!IS_ERR(page)) {
rc = cl_read_ahead_page(env, io, queue,
- page, clob);
+ page, clob, max_index);
if (rc == -ENOLCK) {
which = RA_STAT_FAILED_MATCH;
msg = "lock match failed";
msg = "g_c_p_n failed";
}
if (msg) {
- ll_ra_stats_inc(mapping, which);
+ ll_ra_stats_inc(inode, which);
CDEBUG(D_READA, "%s\n", msg);
}
return rc;
struct cl_io *io, struct cl_page_list *queue,
struct ra_io_arg *ria,
unsigned long *reserved_pages,
- struct address_space *mapping,
unsigned long *ra_end)
{
- int rc, count = 0, stride_ria;
- unsigned long page_idx;
+ int rc, count = 0;
+ bool stride_ria;
+ pgoff_t page_idx;
+ pgoff_t max_index = 0;
LASSERT(ria);
RIA_DEBUG(ria);
if (ras_inside_ra_window(page_idx, ria)) {
/* If the page is inside the read-ahead window*/
rc = ll_read_ahead_page(env, io, queue,
- page_idx, mapping);
+ page_idx, &max_index);
if (rc == 1) {
(*reserved_pages)--;
count++;
}
int ll_readahead(const struct lu_env *env, struct cl_io *io,
- struct ll_readahead_state *ras, struct address_space *mapping,
- struct cl_page_list *queue, int flags)
+ struct cl_page_list *queue, struct ll_readahead_state *ras,
+ bool hit)
{
struct vvp_io *vio = vvp_env_io(env);
struct vvp_thread_info *vti = vvp_env_info(env);
struct cl_attr *attr = ccc_env_thread_attr(env);
unsigned long start = 0, end = 0, reserved;
- unsigned long ra_end, len;
+ unsigned long ra_end, len, mlen = 0;
struct inode *inode;
struct ll_ra_read *bead;
struct ra_io_arg *ria = &vti->vti_ria;
- struct ll_inode_info *lli;
struct cl_object *clob;
int ret = 0;
__u64 kms;
- inode = mapping->host;
- lli = ll_i2info(inode);
- clob = lli->lli_clob;
+ clob = io->ci_obj;
+ inode = ccc_object_inode(clob);
memset(ria, 0, sizeof(*ria));
return ret;
kms = attr->cat_kms;
if (kms == 0) {
- ll_ra_stats_inc(mapping, RA_STAT_ZERO_LEN);
+ ll_ra_stats_inc(inode, RA_STAT_ZERO_LEN);
return 0;
}
spin_unlock(&ras->ras_lock);
if (end == 0) {
- ll_ra_stats_inc(mapping, RA_STAT_ZERO_WINDOW);
+ ll_ra_stats_inc(inode, RA_STAT_ZERO_WINDOW);
return 0;
}
len = ria_page_count(ria);
- if (len == 0)
+ if (len == 0) {
+ ll_ra_stats_inc(inode, RA_STAT_ZERO_WINDOW);
return 0;
+ }
+
+ CDEBUG(D_READA, DFID ": ria: %lu/%lu, bead: %lu/%lu, hit: %d\n",
+ PFID(lu_object_fid(&clob->co_lu)),
+ ria->ria_start, ria->ria_end,
+ !bead ? 0 : bead->lrr_start,
+ !bead ? 0 : bead->lrr_count,
+ hit);
+
+ /* at least to extend the readahead window to cover current read */
+ if (!hit && bead &&
+ bead->lrr_start + bead->lrr_count > ria->ria_start) {
+ /* to the end of current read window. */
+ mlen = bead->lrr_start + bead->lrr_count - ria->ria_start;
+ /* trim to RPC boundary */
+ start = ria->ria_start & (PTLRPC_MAX_BRW_PAGES - 1);
+ mlen = min(mlen, PTLRPC_MAX_BRW_PAGES - start);
+ }
- reserved = ll_ra_count_get(ll_i2sbi(inode), ria, len);
+ reserved = ll_ra_count_get(ll_i2sbi(inode), ria, len, mlen);
if (reserved < len)
- ll_ra_stats_inc(mapping, RA_STAT_MAX_IN_FLIGHT);
+ ll_ra_stats_inc(inode, RA_STAT_MAX_IN_FLIGHT);
- CDEBUG(D_READA, "reserved page %lu ra_cur %d ra_max %lu\n", reserved,
+ CDEBUG(D_READA, "reserved pages %lu/%lu/%lu, ra_cur %d, ra_max %lu\n",
+ reserved, len, mlen,
atomic_read(&ll_i2sbi(inode)->ll_ra_info.ra_cur_pages),
ll_i2sbi(inode)->ll_ra_info.ra_max_pages);
- ret = ll_read_ahead_pages(env, io, queue,
- ria, &reserved, mapping, &ra_end);
+ ret = ll_read_ahead_pages(env, io, queue, ria, &reserved, &ra_end);
if (reserved != 0)
ll_ra_count_put(ll_i2sbi(inode), reserved);
if (ra_end == end + 1 && ra_end == (kms >> PAGE_CACHE_SHIFT))
- ll_ra_stats_inc(mapping, RA_STAT_EOF);
+ ll_ra_stats_inc(inode, RA_STAT_EOF);
/* if we didn't get to the end of the region we reserved from
* the ras we need to go back and update the ras so that the
ra_end, end, ria->ria_end);
if (ra_end != end + 1) {
+ ll_ra_stats_inc(inode, RA_STAT_FAILED_REACH_END);
spin_lock(&ras->ras_lock);
if (ra_end < ras->ras_next_readahead &&
index_in_window(ra_end, ras->ras_window_start, 0,
ras->ras_last_readpage = index;
ras_set_start(inode, ras, index);
- if (stride_io_mode(ras))
+ if (stride_io_mode(ras)) {
/* Since stride readahead is sensitive to the offset
* of read-ahead, so we use original offset here,
* instead of ras_window_start, which is RPC aligned
*/
ras->ras_next_readahead = max(index, ras->ras_next_readahead);
- else
- ras->ras_next_readahead = max(ras->ras_window_start,
- ras->ras_next_readahead);
+ } else {
+ if (ras->ras_next_readahead < ras->ras_window_start)
+ ras->ras_next_readahead = ras->ras_window_start;
+ if (!hit)
+ ras->ras_next_readahead = index + 1;
+ }
RAS_CDEBUG(ras);
/* Trigger RA in the mmap case where ras_consecutive_requests
const struct cl_page_slice *slice)
{
struct cl_io *io = ios->cis_io;
- struct cl_object *obj = slice->cpl_obj;
struct ccc_page *cp = cl2ccc_page(slice);
struct cl_page *page = slice->cpl_page;
- struct inode *inode = ccc_object_inode(obj);
+ struct inode *inode = ccc_object_inode(slice->cpl_obj);
struct ll_sb_info *sbi = ll_i2sbi(inode);
struct ll_file_data *fd = cl2ccc_io(env, ios)->cui_fd;
struct ll_readahead_state *ras = &fd->fd_ras;
- struct page *vmpage = cp->cpg_page;
struct cl_2queue *queue = &io->ci_queue;
- int rc;
-
- CLOBINVRNT(env, obj, ccc_object_invariant(obj));
- LASSERT(slice->cpl_obj == obj);
if (sbi->ll_ra_info.ra_max_pages_per_file &&
sbi->ll_ra_info.ra_max_pages)
ras_update(sbi, inode, ras, ccc_index(cp),
cp->cpg_defer_uptodate);
- /* Sanity check whether the page is protected by a lock. */
- rc = cl_page_is_under_lock(env, io, page);
- if (rc != -EBUSY) {
- CL_PAGE_HEADER(D_WARNING, env, page, "%s: %d\n",
- rc == -ENODATA ? "without a lock" :
- "match failed", rc);
- if (rc != -ENODATA)
- return rc;
- }
-
if (cp->cpg_defer_uptodate) {
cp->cpg_ra_used = 1;
cl_page_export(env, page, 1);
* Add page into the queue even when it is marked uptodate above.
* this will unlock it automatically as part of cl_page_list_disown().
*/
+
cl_page_list_add(&queue->c2_qin, page);
if (sbi->ll_ra_info.ra_max_pages_per_file &&
sbi->ll_ra_info.ra_max_pages)
- ll_readahead(env, io, ras,
- vmpage->mapping, &queue->c2_qin, fd->fd_flags);
+ ll_readahead(env, io, &queue->c2_qin, ras,
+ cp->cpg_defer_uptodate);
return 0;
}
LASSERT(PageLocked(vmpage));
if (cpg->cpg_defer_uptodate && !cpg->cpg_ra_used)
- ll_ra_stats_inc(vmpage->mapping, RA_STAT_DISCARDED);
+ ll_ra_stats_inc(vmpage->mapping->host, RA_STAT_DISCARDED);
ll_invalidate_page(vmpage);
}
return result;
}
+static int vvp_page_is_under_lock(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ struct cl_io *io, pgoff_t *max_index)
+{
+ if (io->ci_type == CIT_READ || io->ci_type == CIT_WRITE ||
+ io->ci_type == CIT_FAULT) {
+ struct ccc_io *cio = ccc_env_io(env);
+
+ if (unlikely(cio->cui_fd->fd_flags & LL_FILE_GROUP_LOCKED))
+ *max_index = CL_PAGE_EOF;
+ }
+ return 0;
+}
+
static int vvp_page_print(const struct lu_env *env,
const struct cl_page_slice *slice,
void *cookie, lu_printer_t printer)
.cpo_is_vmlocked = vvp_page_is_vmlocked,
.cpo_fini = vvp_page_fini,
.cpo_print = vvp_page_print,
- .cpo_is_under_lock = ccc_page_is_under_lock,
+ .cpo_is_under_lock = vvp_page_is_under_lock,
.io = {
[CRT_READ] = {
.cpo_prep = vvp_page_prep_read,
.cpo_fini = vvp_transient_page_fini,
.cpo_is_vmlocked = vvp_transient_page_is_vmlocked,
.cpo_print = vvp_page_print,
- .cpo_is_under_lock = ccc_page_is_under_lock,
+ .cpo_is_under_lock = vvp_page_is_under_lock,
.io = {
[CRT_READ] = {
.cpo_prep = ccc_transient_page_prep,
CLOBINVRNT(env, obj, ccc_object_invariant(obj));
- cpg->cpg_cl.cpl_index = index;
cpg->cpg_page = vmpage;
page_cache_get(vmpage);
atomic_inc(&page->cp_ref);
SetPagePrivate(vmpage);
vmpage->private = (unsigned long)page;
- cl_page_slice_add(page, &cpg->cpg_cl, obj, &vvp_page_ops);
+ cl_page_slice_add(page, &cpg->cpg_cl, obj, index,
+ &vvp_page_ops);
} else {
struct ccc_object *clobj = cl2ccc(obj);
LASSERT(!inode_trylock(clobj->cob_inode));
- cl_page_slice_add(page, &cpg->cpg_cl, obj,
+ cl_page_slice_add(page, &cpg->cpg_cl, obj, index,
&vvp_transient_page_ops);
clobj->cob_transient_pages++;
}
struct lovsub_lock *sub);
struct lov_io_sub *lov_page_subio(const struct lu_env *env, struct lov_io *lio,
const struct cl_page_slice *slice);
+int lov_page_stripe(const struct cl_page *page);
#define lov_foreach_target(lov, var) \
for (var = 0; var < lov_targets_nr(lov); ++var)
u64 start, u64 end,
u64 *obd_start, u64 *obd_end);
int lov_stripe_number(struct lov_stripe_md *lsm, u64 lov_off);
+pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, pgoff_t stripe_index,
+ int stripe);
/* lov_qos.c */
#define LOV_USES_ASSIGNED_STRIPE 0
*
*/
-static int lov_page_stripe(const struct cl_page *page)
+int lov_page_stripe(const struct cl_page *page)
{
struct lovsub_object *subobj;
const struct cl_page_slice *slice;
return lov_size;
}
+/**
+ * Compute file level page index by stripe level page offset
+ */
+pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, pgoff_t stripe_index,
+ int stripe)
+{
+ loff_t offset;
+
+ offset = lov_stripe_size(lsm, stripe_index << PAGE_CACHE_SHIFT,
+ stripe);
+ return offset >> PAGE_CACHE_SHIFT;
+}
+
/* we have an offset in file backed by an lov and want to find out where
* that offset lands in our given stripe of the file. for the easy
* case where the offset is within the stripe, we just have to scale the
* Lov page operations.
*
*/
-static int lov_page_print(const struct lu_env *env,
- const struct cl_page_slice *slice,
- void *cookie, lu_printer_t printer)
+
+/**
+ * Adjust the stripe index by layout of raid0. @max_index is the maximum
+ * page index covered by an underlying DLM lock.
+ * This function converts max_index from stripe level to file level, and make
+ * sure it's not beyond one stripe.
+ */
+static int lov_raid0_page_is_under_lock(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ struct cl_io *unused,
+ pgoff_t *max_index)
+{
+ struct lov_object *loo = cl2lov(slice->cpl_obj);
+ struct lov_layout_raid0 *r0 = lov_r0(loo);
+ pgoff_t index = *max_index;
+ unsigned int pps; /* pages per stripe */
+
+ CDEBUG(D_READA, "*max_index = %lu, nr = %d\n", index, r0->lo_nr);
+ if (index == 0) /* the page is not covered by any lock */
+ return 0;
+
+ if (r0->lo_nr == 1) /* single stripe file */
+ return 0;
+
+ /* max_index is stripe level, convert it into file level */
+ if (index != CL_PAGE_EOF) {
+ int stripeno = lov_page_stripe(slice->cpl_page);
+ *max_index = lov_stripe_pgoff(loo->lo_lsm, index, stripeno);
+ }
+
+ /* calculate the end of current stripe */
+ pps = loo->lo_lsm->lsm_stripe_size >> PAGE_CACHE_SHIFT;
+ index = ((slice->cpl_index + pps) & ~(pps - 1)) - 1;
+
+ /* never exceed the end of the stripe */
+ *max_index = min_t(pgoff_t, *max_index, index);
+ return 0;
+}
+
+static int lov_raid0_page_print(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ void *cookie, lu_printer_t printer)
{
struct lov_page *lp = cl2lov_page(slice);
- return (*printer)(env, cookie, LUSTRE_LOV_NAME"-page@%p\n", lp);
+ return (*printer)(env, cookie, LUSTRE_LOV_NAME "-page@%p, raid0\n", lp);
}
-static const struct cl_page_operations lov_page_ops = {
- .cpo_print = lov_page_print
+static const struct cl_page_operations lov_raid0_page_ops = {
+ .cpo_is_under_lock = lov_raid0_page_is_under_lock,
+ .cpo_print = lov_raid0_page_print
};
int lov_page_init_raid0(const struct lu_env *env, struct cl_object *obj,
rc = lov_stripe_offset(loo->lo_lsm, offset, stripe, &suboff);
LASSERT(rc == 0);
- cl_page_slice_add(page, &lpg->lps_cl, obj, &lov_page_ops);
+ cl_page_slice_add(page, &lpg->lps_cl, obj, index, &lov_raid0_page_ops);
sub = lov_sub_get(env, lio, stripe);
if (IS_ERR(sub))
return rc;
}
-static int lov_page_empty_print(const struct lu_env *env,
+static int lov_empty_page_print(const struct lu_env *env,
const struct cl_page_slice *slice,
void *cookie, lu_printer_t printer)
{
}
static const struct cl_page_operations lov_empty_page_ops = {
- .cpo_print = lov_page_empty_print
+ .cpo_print = lov_empty_page_print
};
int lov_page_init_empty(const struct lu_env *env, struct cl_object *obj,
struct lov_page *lpg = cl_object_page_slice(obj, page);
void *addr;
- cl_page_slice_add(page, &lpg->lps_cl, obj, &lov_empty_page_ops);
+ cl_page_slice_add(page, &lpg->lps_cl, obj, index, &lov_empty_page_ops);
addr = kmap(page->cp_vmpage);
memset(addr, 0, cl_page_size(obj));
kunmap(page->cp_vmpage);
};
int lovsub_page_init(const struct lu_env *env, struct cl_object *obj,
- struct cl_page *page, pgoff_t ind)
+ struct cl_page *page, pgoff_t index)
{
struct lovsub_page *lsb = cl_object_page_slice(obj, page);
- cl_page_slice_add(page, &lsb->lsb_cl, obj, &lovsub_page_ops);
+ cl_page_slice_add(page, &lsb->lsb_cl, obj, index, &lovsub_page_ops);
return 0;
}
break;
}
}
- if (result == 0)
+ if (result == 0 && queue->c2_qin.pl_nr > 0)
result = cl_io_submit_rw(env, io, CRT_READ, queue);
/*
* Unlock unsent pages in case of error.
__result; \
})
+#define CL_PAGE_INVOKE_REVERSE(_env, _page, _op, _proto, ...) \
+({ \
+ const struct lu_env *__env = (_env); \
+ struct cl_page *__page = (_page); \
+ const struct cl_page_slice *__scan; \
+ int __result; \
+ ptrdiff_t __op = (_op); \
+ int (*__method)_proto; \
+ \
+ __result = 0; \
+ list_for_each_entry_reverse(__scan, &__page->cp_layers, \
+ cpl_linkage) { \
+ __method = *(void **)((char *)__scan->cpl_ops + __op); \
+ if (__method) { \
+ __result = (*__method)(__env, __scan, ## __VA_ARGS__); \
+ if (__result != 0) \
+ break; \
+ } \
+ } \
+ if (__result > 0) \
+ __result = 0; \
+ __result; \
+})
+
#define CL_PAGE_INVOID(_env, _page, _op, _proto, ...) \
do { \
const struct lu_env *__env = (_env); \
* \see cl_page_operations::cpo_is_under_lock()
*/
int cl_page_is_under_lock(const struct lu_env *env, struct cl_io *io,
- struct cl_page *page)
+ struct cl_page *page, pgoff_t *max_index)
{
int rc;
PINVRNT(env, page, cl_page_invariant(page));
- rc = CL_PAGE_INVOKE(env, page, CL_PAGE_OP(cpo_is_under_lock),
- (const struct lu_env *,
- const struct cl_page_slice *, struct cl_io *),
- io);
- PASSERT(env, page, rc != 0);
+ rc = CL_PAGE_INVOKE_REVERSE(env, page, CL_PAGE_OP(cpo_is_under_lock),
+ (const struct lu_env *,
+ const struct cl_page_slice *,
+ struct cl_io *, pgoff_t *),
+ io, max_index);
return rc;
}
EXPORT_SYMBOL(cl_page_is_under_lock);
* \see cl_lock_slice_add(), cl_req_slice_add(), cl_io_slice_add()
*/
void cl_page_slice_add(struct cl_page *page, struct cl_page_slice *slice,
- struct cl_object *obj,
+ struct cl_object *obj, pgoff_t index,
const struct cl_page_operations *ops)
{
list_add_tail(&slice->cpl_linkage, &page->cp_layers);
slice->cpl_obj = obj;
+ slice->cpl_index = index;
slice->cpl_ops = ops;
slice->cpl_page = page;
}
page_cache_get(page->cp_vmpage);
mutex_init(&ep->ep_lock);
- cl_page_slice_add(page, &ep->ep_cl, obj, &echo_page_ops);
+ cl_page_slice_add(page, &ep->ep_cl, obj, index, &echo_page_ops);
atomic_inc(&eco->eo_npages);
return 0;
}
static int osc_page_is_under_lock(const struct lu_env *env,
const struct cl_page_slice *slice,
- struct cl_io *unused)
+ struct cl_io *unused, pgoff_t *max_index)
{
struct osc_page *opg = cl2osc_page(slice);
struct cl_lock *lock;
int result = -ENODATA;
+ *max_index = 0;
lock = cl_lock_at_pgoff(env, slice->cpl_obj, osc_index(opg),
NULL, 1, 0);
if (lock) {
+ *max_index = lock->cll_descr.cld_end;
cl_lock_put(env, lock);
- result = -EBUSY;
+ result = 0;
}
return result;
}
opg->ops_from = 0;
opg->ops_to = PAGE_CACHE_SIZE;
- opg->ops_cl.cpl_index = index;
result = osc_prep_async_page(osc, opg, page->cp_vmpage,
cl_offset(obj, index));
struct osc_io *oio = osc_env_io(env);
opg->ops_srvlock = osc_io_srvlock(oio);
- cl_page_slice_add(page, &opg->ops_cl, obj, &osc_page_ops);
+ cl_page_slice_add(page, &opg->ops_cl, obj, index,
+ &osc_page_ops);
}
/*
* Cannot assert osc_page_protected() here as read-ahead
projects / linux-beck.git / commitdiff