*/
#define PAGE_UNALLOCATED ((void *)0x5F0E4B1D)
-/* how to allocate cached pages for a workgroup */
+/* how to allocate cached pages for a pcluster */
enum z_erofs_cache_alloctype {
DONTALLOC, /* don't allocate any cached pages */
DELAYEDALLOC, /* delayed allocation (at the time of submitting io) */
tagptr_fold(compressed_page_t, page, 1)
static struct workqueue_struct *z_erofs_workqueue __read_mostly;
-static struct kmem_cache *z_erofs_workgroup_cachep __read_mostly;
+static struct kmem_cache *pcluster_cachep __read_mostly;
void z_erofs_exit_zip_subsystem(void)
{
destroy_workqueue(z_erofs_workqueue);
- kmem_cache_destroy(z_erofs_workgroup_cachep);
+ kmem_cache_destroy(pcluster_cachep);
}
static inline int init_unzip_workqueue(void)
{
const unsigned int onlinecpus = num_possible_cpus();
+ const unsigned int flags = WQ_UNBOUND | WQ_HIGHPRI | WQ_CPU_INTENSIVE;
/*
- * we don't need too many threads, limiting threads
- * could improve scheduling performance.
+ * no need to spawn too many threads, limiting threads could minimum
+ * scheduling overhead, perhaps per-CPU threads should be better?
*/
- z_erofs_workqueue =
- alloc_workqueue("erofs_unzipd",
- WQ_UNBOUND | WQ_HIGHPRI | WQ_CPU_INTENSIVE,
- onlinecpus + onlinecpus / 4);
-
+ z_erofs_workqueue = alloc_workqueue("erofs_unzipd", flags,
+ onlinecpus + onlinecpus / 4);
return z_erofs_workqueue ? 0 : -ENOMEM;
}
static void init_once(void *ptr)
{
- struct z_erofs_vle_workgroup *grp = ptr;
- struct z_erofs_vle_work *const work =
- z_erofs_vle_grab_primary_work(grp);
+ struct z_erofs_pcluster *pcl = ptr;
+ struct z_erofs_collection *cl = z_erofs_primarycollection(pcl);
unsigned int i;
- mutex_init(&work->lock);
- work->nr_pages = 0;
- work->vcnt = 0;
+ mutex_init(&cl->lock);
+ cl->nr_pages = 0;
+ cl->vcnt = 0;
for (i = 0; i < Z_EROFS_CLUSTER_MAX_PAGES; ++i)
- grp->compressed_pages[i] = NULL;
+ pcl->compressed_pages[i] = NULL;
}
-static void init_always(struct z_erofs_vle_workgroup *grp)
+static void init_always(struct z_erofs_pcluster *pcl)
{
- struct z_erofs_vle_work *const work =
- z_erofs_vle_grab_primary_work(grp);
+ struct z_erofs_collection *cl = z_erofs_primarycollection(pcl);
- atomic_set(&grp->obj.refcount, 1);
- grp->flags = 0;
+ atomic_set(&pcl->obj.refcount, 1);
- DBG_BUGON(work->nr_pages);
- DBG_BUGON(work->vcnt);
+ DBG_BUGON(cl->nr_pages);
+ DBG_BUGON(cl->vcnt);
}
int __init z_erofs_init_zip_subsystem(void)
{
- z_erofs_workgroup_cachep =
- kmem_cache_create("erofs_compress",
- Z_EROFS_WORKGROUP_SIZE, 0,
- SLAB_RECLAIM_ACCOUNT, init_once);
-
- if (z_erofs_workgroup_cachep) {
+ pcluster_cachep = kmem_cache_create("erofs_compress",
+ Z_EROFS_WORKGROUP_SIZE, 0,
+ SLAB_RECLAIM_ACCOUNT, init_once);
+ if (pcluster_cachep) {
if (!init_unzip_workqueue())
return 0;
- kmem_cache_destroy(z_erofs_workgroup_cachep);
+ kmem_cache_destroy(pcluster_cachep);
}
return -ENOMEM;
}
-enum z_erofs_vle_work_role {
- Z_EROFS_VLE_WORK_SECONDARY,
- Z_EROFS_VLE_WORK_PRIMARY,
+enum z_erofs_collectmode {
+ COLLECT_SECONDARY,
+ COLLECT_PRIMARY,
/*
- * The current work was the tail of an exist chain, and the previous
- * processed chained works are all decided to be hooked up to it.
- * A new chain should be created for the remaining unprocessed works,
- * therefore different from Z_EROFS_VLE_WORK_PRIMARY_FOLLOWED,
- * the next work cannot reuse the whole page in the following scenario:
+ * The current collection was the tail of an exist chain, in addition
+ * that the previous processed chained collections are all decided to
+ * be hooked up to it.
+ * A new chain will be created for the remaining collections which are
+ * not processed yet, therefore different from COLLECT_PRIMARY_FOLLOWED,
+ * the next collection cannot reuse the whole page safely in
+ * the following scenario:
* ________________________________________________________________
* | tail (partial) page | head (partial) page |
- * | (belongs to the next work) | (belongs to the current work) |
+ * | (belongs to the next cl) | (belongs to the current cl) |
* |_______PRIMARY_FOLLOWED_______|________PRIMARY_HOOKED___________|
*/
- Z_EROFS_VLE_WORK_PRIMARY_HOOKED,
+ COLLECT_PRIMARY_HOOKED,
+ COLLECT_PRIMARY_FOLLOWED_NOINPLACE,
/*
- * The current work has been linked with the processed chained works,
- * and could be also linked with the potential remaining works, which
- * means if the processing page is the tail partial page of the work,
- * the current work can safely use the whole page (since the next work
- * is under control) for in-place decompression, as illustrated below:
+ * The current collection has been linked with the owned chain, and
+ * could also be linked with the remaining collections, which means
+ * if the processing page is the tail page of the collection, thus
+ * the current collection can safely use the whole page (since
+ * the previous collection is under control) for in-place I/O, as
+ * illustrated below:
* ________________________________________________________________
- * | tail (partial) page | head (partial) page |
- * | (of the current work) | (of the previous work) |
- * | PRIMARY_FOLLOWED or | |
- * |_____PRIMARY_HOOKED____|____________PRIMARY_FOLLOWED____________|
+ * | tail (partial) page | head (partial) page |
+ * | (of the current cl) | (of the previous collection) |
+ * | PRIMARY_FOLLOWED or | |
+ * |_____PRIMARY_HOOKED___|____________PRIMARY_FOLLOWED____________|
*
- * [ (*) the above page can be used for the current work itself. ]
+ * [ (*) the above page can be used as inplace I/O. ]
*/
- Z_EROFS_VLE_WORK_PRIMARY_FOLLOWED,
- Z_EROFS_VLE_WORK_MAX
+ COLLECT_PRIMARY_FOLLOWED,
};
-struct z_erofs_vle_work_builder {
- enum z_erofs_vle_work_role role;
- /*
- * 'hosted = false' means that the current workgroup doesn't belong to
- * the owned chained workgroups. In the other words, it is none of our
- * business to submit this workgroup.
- */
- bool hosted;
-
- struct z_erofs_vle_workgroup *grp;
- struct z_erofs_vle_work *work;
+struct z_erofs_collector {
struct z_erofs_pagevec_ctor vector;
- /* pages used for reading the compressed data */
- struct page **compressed_pages;
- unsigned int compressed_deficit;
+ struct z_erofs_pcluster *pcl;
+ struct z_erofs_collection *cl;
+ struct page **compressedpages;
+ z_erofs_next_pcluster_t owned_head;
+
+ enum z_erofs_collectmode mode;
};
-#define VLE_WORK_BUILDER_INIT() \
- { .work = NULL, .role = Z_EROFS_VLE_WORK_PRIMARY_FOLLOWED }
+struct z_erofs_decompress_frontend {
+ struct inode *const inode;
+
+ struct z_erofs_collector clt;
+ struct erofs_map_blocks map;
+
+ /* used for applying cache strategy on the fly */
+ bool backmost;
+ erofs_off_t headoffset;
+};
+
+#define COLLECTOR_INIT() { \
+ .owned_head = Z_EROFS_PCLUSTER_TAIL, \
+ .mode = COLLECT_PRIMARY_FOLLOWED }
+
+#define DECOMPRESS_FRONTEND_INIT(__i) { \
+ .inode = __i, .clt = COLLECTOR_INIT(), \
+ .backmost = true, }
+
+static struct page *z_pagemap_global[Z_EROFS_VMAP_GLOBAL_PAGES];
+static DEFINE_MUTEX(z_pagemap_global_lock);
#ifdef EROFS_FS_HAS_MANAGED_CACHE
-static void preload_compressed_pages(struct z_erofs_vle_work_builder *bl,
+static void preload_compressed_pages(struct z_erofs_collector *clt,
struct address_space *mc,
- pgoff_t index,
- unsigned int clusterpages,
enum z_erofs_cache_alloctype type,
- struct list_head *pagepool,
- gfp_t gfp)
+ struct list_head *pagepool)
{
- struct page **const pages = bl->compressed_pages;
- const unsigned int remaining = bl->compressed_deficit;
+ const struct z_erofs_pcluster *pcl = clt->pcl;
+ const unsigned int clusterpages = BIT(pcl->clusterbits);
+ struct page **pages = clt->compressedpages;
+ pgoff_t index = pcl->obj.index + (pages - pcl->compressed_pages);
bool standalone = true;
- unsigned int i, j = 0;
- if (bl->role < Z_EROFS_VLE_WORK_PRIMARY_FOLLOWED)
+ if (clt->mode < COLLECT_PRIMARY_FOLLOWED)
return;
- gfp = mapping_gfp_constraint(mc, gfp) & ~__GFP_RECLAIM;
-
- index += clusterpages - remaining;
-
- for (i = 0; i < remaining; ++i) {
+ for (; pages < pcl->compressed_pages + clusterpages; ++pages) {
struct page *page;
compressed_page_t t;
/* the compressed page was loaded before */
- if (READ_ONCE(pages[i]))
+ if (READ_ONCE(*pages))
continue;
- page = find_get_page(mc, index + i);
+ page = find_get_page(mc, index);
if (page) {
t = tag_compressed_page_justfound(page);
t = tagptr_init(compressed_page_t, PAGE_UNALLOCATED);
} else { /* DONTALLOC */
if (standalone)
- j = i;
+ clt->compressedpages = pages;
standalone = false;
continue;
}
- if (!cmpxchg_relaxed(&pages[i], NULL, tagptr_cast_ptr(t)))
+ if (!cmpxchg_relaxed(pages, NULL, tagptr_cast_ptr(t)))
continue;
if (page)
put_page(page);
}
- bl->compressed_pages += j;
- bl->compressed_deficit = remaining - j;
- if (standalone)
- bl->role = Z_EROFS_VLE_WORK_PRIMARY;
+ if (standalone) /* downgrade to PRIMARY_FOLLOWED_NOINPLACE */
+ clt->mode = COLLECT_PRIMARY_FOLLOWED_NOINPLACE;
}
/* called by erofs_shrinker to get rid of all compressed_pages */
int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
- struct erofs_workgroup *egrp)
+ struct erofs_workgroup *grp)
{
- struct z_erofs_vle_workgroup *const grp =
- container_of(egrp, struct z_erofs_vle_workgroup, obj);
+ struct z_erofs_pcluster *const pcl =
+ container_of(grp, struct z_erofs_pcluster, obj);
struct address_space *const mapping = MNGD_MAPPING(sbi);
- const int clusterpages = erofs_clusterpages(sbi);
+ const unsigned int clusterpages = BIT(pcl->clusterbits);
int i;
/*
* therefore no need to worry about available decompression users.
*/
for (i = 0; i < clusterpages; ++i) {
- struct page *page = grp->compressed_pages[i];
+ struct page *page = pcl->compressed_pages[i];
- if (!page || page->mapping != mapping)
+ if (!page)
continue;
/* block other users from reclaiming or migrating the page */
if (!trylock_page(page))
return -EBUSY;
- /* barrier is implied in the following 'unlock_page' */
- WRITE_ONCE(grp->compressed_pages[i], NULL);
+ if (unlikely(page->mapping != mapping))
+ continue;
+ /* barrier is implied in the following 'unlock_page' */
+ WRITE_ONCE(pcl->compressed_pages[i], NULL);
set_page_private(page, 0);
ClearPagePrivate(page);
int erofs_try_to_free_cached_page(struct address_space *mapping,
struct page *page)
{
- struct erofs_sb_info *const sbi = EROFS_SB(mapping->host->i_sb);
- const unsigned int clusterpages = erofs_clusterpages(sbi);
- struct z_erofs_vle_workgroup *const grp = (void *)page_private(page);
+ struct z_erofs_pcluster *const pcl = (void *)page_private(page);
+ const unsigned int clusterpages = BIT(pcl->clusterbits);
int ret = 0; /* 0 - busy */
- if (erofs_workgroup_try_to_freeze(&grp->obj, 1)) {
+ if (erofs_workgroup_try_to_freeze(&pcl->obj, 1)) {
unsigned int i;
for (i = 0; i < clusterpages; ++i) {
- if (grp->compressed_pages[i] == page) {
- WRITE_ONCE(grp->compressed_pages[i], NULL);
+ if (pcl->compressed_pages[i] == page) {
+ WRITE_ONCE(pcl->compressed_pages[i], NULL);
ret = 1;
break;
}
}
- erofs_workgroup_unfreeze(&grp->obj, 1);
+ erofs_workgroup_unfreeze(&pcl->obj, 1);
if (ret) {
ClearPagePrivate(page);
return ret;
}
#else
-static void preload_compressed_pages(struct z_erofs_vle_work_builder *bl,
+static void preload_compressed_pages(struct z_erofs_collector *clt,
struct address_space *mc,
- pgoff_t index,
- unsigned int clusterpages,
enum z_erofs_cache_alloctype type,
- struct list_head *pagepool,
- gfp_t gfp)
+ struct list_head *pagepool)
{
/* nowhere to load compressed pages from */
}
#endif
/* page_type must be Z_EROFS_PAGE_TYPE_EXCLUSIVE */
-static inline bool try_to_reuse_as_compressed_page(
- struct z_erofs_vle_work_builder *b,
- struct page *page)
+static inline bool try_inplace_io(struct z_erofs_collector *clt,
+ struct page *page)
{
- while (b->compressed_deficit) {
- --b->compressed_deficit;
- if (!cmpxchg(b->compressed_pages++, NULL, page))
+ struct z_erofs_pcluster *const pcl = clt->pcl;
+ const unsigned int clusterpages = BIT(pcl->clusterbits);
+
+ while (clt->compressedpages < pcl->compressed_pages + clusterpages) {
+ if (!cmpxchg(clt->compressedpages++, NULL, page))
return true;
}
-
return false;
}
-/* callers must be with work->lock held */
-static int z_erofs_vle_work_add_page(
- struct z_erofs_vle_work_builder *builder,
- struct page *page,
- enum z_erofs_page_type type)
+/* callers must be with collection lock held */
+static int z_erofs_attach_page(struct z_erofs_collector *clt,
+ struct page *page,
+ enum z_erofs_page_type type)
{
int ret;
bool occupied;
- /* give priority for the compressed data storage */
- if (builder->role >= Z_EROFS_VLE_WORK_PRIMARY &&
+ /* give priority for inplaceio */
+ if (clt->mode >= COLLECT_PRIMARY &&
type == Z_EROFS_PAGE_TYPE_EXCLUSIVE &&
- try_to_reuse_as_compressed_page(builder, page))
+ try_inplace_io(clt, page))
return 0;
- ret = z_erofs_pagevec_enqueue(&builder->vector,
+ ret = z_erofs_pagevec_enqueue(&clt->vector,
page, type, &occupied);
- builder->work->vcnt += (unsigned int)ret;
+ clt->cl->vcnt += (unsigned int)ret;
return ret ? 0 : -EAGAIN;
}
-static enum z_erofs_vle_work_role
-try_to_claim_workgroup(struct z_erofs_vle_workgroup *grp,
- z_erofs_vle_owned_workgrp_t *owned_head,
- bool *hosted)
+static enum z_erofs_collectmode
+try_to_claim_pcluster(struct z_erofs_pcluster *pcl,
+ z_erofs_next_pcluster_t *owned_head)
{
- DBG_BUGON(*hosted);
-
- /* let's claim these following types of workgroup */
+ /* let's claim these following types of pclusters */
retry:
- if (grp->next == Z_EROFS_VLE_WORKGRP_NIL) {
- /* type 1, nil workgroup */
- if (cmpxchg(&grp->next, Z_EROFS_VLE_WORKGRP_NIL,
- *owned_head) != Z_EROFS_VLE_WORKGRP_NIL)
+ if (pcl->next == Z_EROFS_PCLUSTER_NIL) {
+ /* type 1, nil pcluster */
+ if (cmpxchg(&pcl->next, Z_EROFS_PCLUSTER_NIL,
+ *owned_head) != Z_EROFS_PCLUSTER_NIL)
goto retry;
- *owned_head = &grp->next;
- *hosted = true;
+ *owned_head = &pcl->next;
/* lucky, I am the followee :) */
- return Z_EROFS_VLE_WORK_PRIMARY_FOLLOWED;
-
- } else if (grp->next == Z_EROFS_VLE_WORKGRP_TAIL) {
+ return COLLECT_PRIMARY_FOLLOWED;
+ } else if (pcl->next == Z_EROFS_PCLUSTER_TAIL) {
/*
* type 2, link to the end of a existing open chain,
* be careful that its submission itself is governed
* by the original owned chain.
*/
- if (cmpxchg(&grp->next, Z_EROFS_VLE_WORKGRP_TAIL,
- *owned_head) != Z_EROFS_VLE_WORKGRP_TAIL)
+ if (cmpxchg(&pcl->next, Z_EROFS_PCLUSTER_TAIL,
+ *owned_head) != Z_EROFS_PCLUSTER_TAIL)
goto retry;
- *owned_head = Z_EROFS_VLE_WORKGRP_TAIL;
- return Z_EROFS_VLE_WORK_PRIMARY_HOOKED;
+ *owned_head = Z_EROFS_PCLUSTER_TAIL;
+ return COLLECT_PRIMARY_HOOKED;
}
-
- return Z_EROFS_VLE_WORK_PRIMARY; /* :( better luck next time */
+ return COLLECT_PRIMARY; /* :( better luck next time */
}
-struct z_erofs_vle_work_finder {
- struct super_block *sb;
- pgoff_t idx;
- unsigned int pageofs;
-
- struct z_erofs_vle_workgroup **grp_ret;
- enum z_erofs_vle_work_role *role;
- z_erofs_vle_owned_workgrp_t *owned_head;
- bool *hosted;
-};
-
-static struct z_erofs_vle_work *
-z_erofs_vle_work_lookup(const struct z_erofs_vle_work_finder *f)
+static struct z_erofs_collection *cllookup(struct z_erofs_collector *clt,
+ struct inode *inode,
+ struct erofs_map_blocks *map)
{
- bool tag, primary;
- struct erofs_workgroup *egrp;
- struct z_erofs_vle_workgroup *grp;
- struct z_erofs_vle_work *work;
-
- egrp = erofs_find_workgroup(f->sb, f->idx, &tag);
- if (!egrp) {
- *f->grp_ret = NULL;
+ struct erofs_workgroup *grp;
+ struct z_erofs_pcluster *pcl;
+ struct z_erofs_collection *cl;
+ unsigned int length;
+ bool tag;
+
+ grp = erofs_find_workgroup(inode->i_sb, map->m_pa >> PAGE_SHIFT, &tag);
+ if (!grp)
return NULL;
- }
- grp = container_of(egrp, struct z_erofs_vle_workgroup, obj);
- *f->grp_ret = grp;
+ pcl = container_of(grp, struct z_erofs_pcluster, obj);
+
+ cl = z_erofs_primarycollection(pcl);
+ if (unlikely(cl->pageofs != (map->m_la & ~PAGE_MASK))) {
+ DBG_BUGON(1);
+ return ERR_PTR(-EIO);
+ }
- work = z_erofs_vle_grab_work(grp, f->pageofs);
- /* if multiref is disabled, `primary' is always true */
- primary = true;
+ length = READ_ONCE(pcl->length);
+ if (length & Z_EROFS_PCLUSTER_FULL_LENGTH) {
+ if ((map->m_llen << Z_EROFS_PCLUSTER_LENGTH_BIT) > length) {
+ DBG_BUGON(1);
+ return ERR_PTR(-EIO);
+ }
+ } else {
+ unsigned int llen = map->m_llen << Z_EROFS_PCLUSTER_LENGTH_BIT;
- DBG_BUGON(work->pageofs != f->pageofs);
+ if (map->m_flags & EROFS_MAP_FULL_MAPPED)
+ llen |= Z_EROFS_PCLUSTER_FULL_LENGTH;
- /*
- * lock must be taken first to avoid grp->next == NIL between
- * claiming workgroup and adding pages:
- * grp->next != NIL
- * grp->next = NIL
- * mutex_unlock_all
- * mutex_lock(&work->lock)
- * add all pages to pagevec
- *
- * [correct locking case 1]:
- * mutex_lock(grp->work[a])
- * ...
- * mutex_lock(grp->work[b]) mutex_lock(grp->work[c])
- * ... *role = SECONDARY
- * add all pages to pagevec
- * ...
- * mutex_unlock(grp->work[c])
- * mutex_lock(grp->work[c])
- * ...
- * grp->next = NIL
- * mutex_unlock_all
- *
- * [correct locking case 2]:
- * mutex_lock(grp->work[b])
- * ...
- * mutex_lock(grp->work[a])
- * ...
- * mutex_lock(grp->work[c])
- * ...
- * grp->next = NIL
- * mutex_unlock_all
- * mutex_lock(grp->work[a])
- * *role = PRIMARY_OWNER
- * add all pages to pagevec
- * ...
- */
- mutex_lock(&work->lock);
-
- *f->hosted = false;
- if (!primary)
- *f->role = Z_EROFS_VLE_WORK_SECONDARY;
- else /* claim the workgroup if possible */
- *f->role = try_to_claim_workgroup(grp, f->owned_head,
- f->hosted);
- return work;
+ while (llen > length &&
+ length != cmpxchg_relaxed(&pcl->length, length, llen)) {
+ cpu_relax();
+ length = READ_ONCE(pcl->length);
+ }
+ }
+ mutex_lock(&cl->lock);
+ clt->mode = try_to_claim_pcluster(pcl, &clt->owned_head);
+ clt->pcl = pcl;
+ clt->cl = cl;
+ return cl;
}
-static struct z_erofs_vle_work *
-z_erofs_vle_work_register(const struct z_erofs_vle_work_finder *f,
- struct erofs_map_blocks *map)
+static struct z_erofs_collection *clregister(struct z_erofs_collector *clt,
+ struct inode *inode,
+ struct erofs_map_blocks *map)
{
- bool gnew = false;
- struct z_erofs_vle_workgroup *grp = *f->grp_ret;
- struct z_erofs_vle_work *work;
-
- /* if multiref is disabled, grp should never be nullptr */
- if (unlikely(grp)) {
- DBG_BUGON(1);
- return ERR_PTR(-EINVAL);
- }
+ struct z_erofs_pcluster *pcl;
+ struct z_erofs_collection *cl;
+ int err;
/* no available workgroup, let's allocate one */
- grp = kmem_cache_alloc(z_erofs_workgroup_cachep, GFP_NOFS);
- if (unlikely(!grp))
+ pcl = kmem_cache_alloc(pcluster_cachep, GFP_NOFS);
+ if (unlikely(!pcl))
return ERR_PTR(-ENOMEM);
- init_always(grp);
- grp->obj.index = f->idx;
- grp->llen = map->m_llen;
+ init_always(pcl);
+ pcl->obj.index = map->m_pa >> PAGE_SHIFT;
- z_erofs_vle_set_workgrp_fmt(grp, (map->m_flags & EROFS_MAP_ZIPPED) ?
- Z_EROFS_VLE_WORKGRP_FMT_LZ4 :
- Z_EROFS_VLE_WORKGRP_FMT_PLAIN);
+ pcl->length = (map->m_llen << Z_EROFS_PCLUSTER_LENGTH_BIT) |
+ (map->m_flags & EROFS_MAP_FULL_MAPPED ?
+ Z_EROFS_PCLUSTER_FULL_LENGTH : 0);
- if (map->m_flags & EROFS_MAP_FULL_MAPPED)
- grp->flags |= Z_EROFS_VLE_WORKGRP_FULL_LENGTH;
+ if (map->m_flags & EROFS_MAP_ZIPPED)
+ pcl->algorithmformat = Z_EROFS_COMPRESSION_LZ4;
+ else
+ pcl->algorithmformat = Z_EROFS_COMPRESSION_SHIFTED;
+
+ pcl->clusterbits = EROFS_V(inode)->z_physical_clusterbits[0];
+ pcl->clusterbits -= PAGE_SHIFT;
- /* new workgrps have been claimed as type 1 */
- WRITE_ONCE(grp->next, *f->owned_head);
- /* primary and followed work for all new workgrps */
- *f->role = Z_EROFS_VLE_WORK_PRIMARY_FOLLOWED;
- /* it should be submitted by ourselves */
- *f->hosted = true;
+ /* new pclusters should be claimed as type 1, primary and followed */
+ pcl->next = clt->owned_head;
+ clt->mode = COLLECT_PRIMARY_FOLLOWED;
- gnew = true;
- work = z_erofs_vle_grab_primary_work(grp);
- work->pageofs = f->pageofs;
+ cl = z_erofs_primarycollection(pcl);
+ cl->pageofs = map->m_la & ~PAGE_MASK;
/*
* lock all primary followed works before visible to others
- * and mutex_trylock *never* fails for a new workgroup.
+ * and mutex_trylock *never* fails for a new pcluster.
*/
- mutex_trylock(&work->lock);
+ mutex_trylock(&cl->lock);
- if (gnew) {
- int err = erofs_register_workgroup(f->sb, &grp->obj, 0);
-
- if (err) {
- mutex_unlock(&work->lock);
- kmem_cache_free(z_erofs_workgroup_cachep, grp);
- return ERR_PTR(-EAGAIN);
- }
+ err = erofs_register_workgroup(inode->i_sb, &pcl->obj, 0);
+ if (err) {
+ mutex_unlock(&cl->lock);
+ kmem_cache_free(pcluster_cachep, pcl);
+ return ERR_PTR(-EAGAIN);
}
-
- *f->owned_head = &grp->next;
- *f->grp_ret = grp;
- return work;
+ clt->owned_head = &pcl->next;
+ clt->pcl = pcl;
+ clt->cl = cl;
+ return cl;
}
-#define builder_is_hooked(builder) \
- ((builder)->role >= Z_EROFS_VLE_WORK_PRIMARY_HOOKED)
+static int z_erofs_collector_begin(struct z_erofs_collector *clt,
+ struct inode *inode,
+ struct erofs_map_blocks *map)
+{
+ struct z_erofs_collection *cl;
-#define builder_is_followed(builder) \
- ((builder)->role >= Z_EROFS_VLE_WORK_PRIMARY_FOLLOWED)
+ DBG_BUGON(clt->cl);
-static int z_erofs_vle_work_iter_begin(struct z_erofs_vle_work_builder *builder,
- struct super_block *sb,
- struct erofs_map_blocks *map,
- z_erofs_vle_owned_workgrp_t *owned_head)
-{
- const unsigned int clusterpages = erofs_clusterpages(EROFS_SB(sb));
- struct z_erofs_vle_workgroup *grp;
- const struct z_erofs_vle_work_finder finder = {
- .sb = sb,
- .idx = erofs_blknr(map->m_pa),
- .pageofs = map->m_la & ~PAGE_MASK,
- .grp_ret = &grp,
- .role = &builder->role,
- .owned_head = owned_head,
- .hosted = &builder->hosted
- };
- struct z_erofs_vle_work *work;
-
- DBG_BUGON(builder->work);
-
- /* must be Z_EROFS_WORK_TAIL or the next chained work */
- DBG_BUGON(*owned_head == Z_EROFS_VLE_WORKGRP_NIL);
- DBG_BUGON(*owned_head == Z_EROFS_VLE_WORKGRP_TAIL_CLOSED);
-
- DBG_BUGON(erofs_blkoff(map->m_pa));
+ /* must be Z_EROFS_PCLUSTER_TAIL or pointed to previous collection */
+ DBG_BUGON(clt->owned_head == Z_EROFS_PCLUSTER_NIL);
+ DBG_BUGON(clt->owned_head == Z_EROFS_PCLUSTER_TAIL_CLOSED);
-repeat:
- work = z_erofs_vle_work_lookup(&finder);
- if (work) {
- unsigned int orig_llen;
-
- /* increase workgroup `llen' if needed */
- while ((orig_llen = READ_ONCE(grp->llen)) < map->m_llen &&
- orig_llen != cmpxchg_relaxed(&grp->llen,
- orig_llen, map->m_llen))
- cpu_relax();
- goto got_it;
+ if (!PAGE_ALIGNED(map->m_pa)) {
+ DBG_BUGON(1);
+ return -EINVAL;
}
- work = z_erofs_vle_work_register(&finder, map);
- if (unlikely(work == ERR_PTR(-EAGAIN)))
- goto repeat;
-
- if (IS_ERR(work))
- return PTR_ERR(work);
-got_it:
- z_erofs_pagevec_ctor_init(&builder->vector, Z_EROFS_NR_INLINE_PAGEVECS,
- work->pagevec, work->vcnt);
+repeat:
+ cl = cllookup(clt, inode, map);
+ if (!cl) {
+ cl = clregister(clt, inode, map);
- if (builder->role >= Z_EROFS_VLE_WORK_PRIMARY) {
- /* enable possibly in-place decompression */
- builder->compressed_pages = grp->compressed_pages;
- builder->compressed_deficit = clusterpages;
- } else {
- builder->compressed_pages = NULL;
- builder->compressed_deficit = 0;
+ if (unlikely(cl == ERR_PTR(-EAGAIN)))
+ goto repeat;
}
- builder->grp = grp;
- builder->work = work;
+ if (IS_ERR(cl))
+ return PTR_ERR(cl);
+
+ z_erofs_pagevec_ctor_init(&clt->vector, Z_EROFS_NR_INLINE_PAGEVECS,
+ cl->pagevec, cl->vcnt);
+
+ clt->compressedpages = clt->pcl->compressed_pages;
+ if (clt->mode <= COLLECT_PRIMARY) /* cannot do in-place I/O */
+ clt->compressedpages += Z_EROFS_CLUSTER_MAX_PAGES;
return 0;
}
/*
- * keep in mind that no referenced workgroups will be freed
- * only after a RCU grace period, so rcu_read_lock() could
- * prevent a workgroup from being freed.
+ * keep in mind that no referenced pclusters will be freed
+ * only after a RCU grace period.
*/
static void z_erofs_rcu_callback(struct rcu_head *head)
{
- struct z_erofs_vle_work *work = container_of(head,
- struct z_erofs_vle_work, rcu);
- struct z_erofs_vle_workgroup *grp =
- z_erofs_vle_work_workgroup(work, true);
+ struct z_erofs_collection *const cl =
+ container_of(head, struct z_erofs_collection, rcu);
- kmem_cache_free(z_erofs_workgroup_cachep, grp);
+ kmem_cache_free(pcluster_cachep,
+ container_of(cl, struct z_erofs_pcluster,
+ primary_collection));
}
void erofs_workgroup_free_rcu(struct erofs_workgroup *grp)
{
- struct z_erofs_vle_workgroup *const vgrp = container_of(grp,
- struct z_erofs_vle_workgroup, obj);
- struct z_erofs_vle_work *const work = &vgrp->work;
+ struct z_erofs_pcluster *const pcl =
+ container_of(grp, struct z_erofs_pcluster, obj);
+ struct z_erofs_collection *const cl = z_erofs_primarycollection(pcl);
- call_rcu(&work->rcu, z_erofs_rcu_callback);
+ call_rcu(&cl->rcu, z_erofs_rcu_callback);
}
-static void
-__z_erofs_vle_work_release(struct z_erofs_vle_workgroup *grp,
- struct z_erofs_vle_work *work __maybe_unused)
+static void z_erofs_collection_put(struct z_erofs_collection *cl)
{
- erofs_workgroup_put(&grp->obj);
-}
+ struct z_erofs_pcluster *const pcl =
+ container_of(cl, struct z_erofs_pcluster, primary_collection);
-static void z_erofs_vle_work_release(struct z_erofs_vle_work *work)
-{
- struct z_erofs_vle_workgroup *grp =
- z_erofs_vle_work_workgroup(work, true);
-
- __z_erofs_vle_work_release(grp, work);
+ erofs_workgroup_put(&pcl->obj);
}
-static inline bool
-z_erofs_vle_work_iter_end(struct z_erofs_vle_work_builder *builder)
+static bool z_erofs_collector_end(struct z_erofs_collector *clt)
{
- struct z_erofs_vle_work *work = builder->work;
+ struct z_erofs_collection *cl = clt->cl;
- if (!work)
+ if (!cl)
return false;
- z_erofs_pagevec_ctor_exit(&builder->vector, false);
- mutex_unlock(&work->lock);
+ z_erofs_pagevec_ctor_exit(&clt->vector, false);
+ mutex_unlock(&cl->lock);
/*
- * if all pending pages are added, don't hold work reference
- * any longer if the current work isn't hosted by ourselves.
+ * if all pending pages are added, don't hold its reference
+ * any longer if the pcluster isn't hosted by ourselves.
*/
- if (!builder->hosted)
- __z_erofs_vle_work_release(builder->grp, work);
+ if (clt->mode < COLLECT_PRIMARY_FOLLOWED_NOINPLACE)
+ z_erofs_collection_put(cl);
- builder->work = NULL;
- builder->grp = NULL;
+ clt->cl = NULL;
return true;
}
return page;
}
-struct z_erofs_vle_frontend {
- struct inode *const inode;
-
- struct z_erofs_vle_work_builder builder;
- struct erofs_map_blocks map;
-
- z_erofs_vle_owned_workgrp_t owned_head;
-
- /* used for applying cache strategy on the fly */
- bool backmost;
- erofs_off_t headoffset;
-};
-
-#define VLE_FRONTEND_INIT(__i) { \
- .inode = __i, \
- .map = { \
- .m_llen = 0, \
- .m_plen = 0, \
- .mpage = NULL \
- }, \
- .builder = VLE_WORK_BUILDER_INIT(), \
- .owned_head = Z_EROFS_VLE_WORKGRP_TAIL, \
- .backmost = true, }
-
#ifdef EROFS_FS_HAS_MANAGED_CACHE
-static inline bool
-should_alloc_managed_pages(struct z_erofs_vle_frontend *fe, erofs_off_t la)
+static bool should_alloc_managed_pages(struct z_erofs_decompress_frontend *fe,
+ erofs_off_t la)
{
if (fe->backmost)
return true;
return false;
}
#else
-static inline bool
-should_alloc_managed_pages(struct z_erofs_vle_frontend *fe, erofs_off_t la)
+static bool should_alloc_managed_pages(struct z_erofs_decompress_frontend *fe,
+ erofs_off_t la)
{
return false;
}
#endif
-static int z_erofs_do_read_page(struct z_erofs_vle_frontend *fe,
+static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
struct page *page,
- struct list_head *page_pool)
+ struct list_head *pagepool)
{
- struct super_block *const sb = fe->inode->i_sb;
- struct erofs_sb_info *const sbi __maybe_unused = EROFS_SB(sb);
+ struct inode *const inode = fe->inode;
+ struct erofs_sb_info *const sbi __maybe_unused = EROFS_I_SB(inode);
struct erofs_map_blocks *const map = &fe->map;
- struct z_erofs_vle_work_builder *const builder = &fe->builder;
+ struct z_erofs_collector *const clt = &fe->clt;
const loff_t offset = page_offset(page);
-
- bool tight = builder_is_hooked(builder);
- struct z_erofs_vle_work *work = builder->work;
+ bool tight = (clt->mode >= COLLECT_PRIMARY_HOOKED);
enum z_erofs_cache_alloctype cache_strategy;
enum z_erofs_page_type page_type;
/* lucky, within the range of the current map_blocks */
if (offset + cur >= map->m_la &&
offset + cur < map->m_la + map->m_llen) {
- /* didn't get a valid unzip work previously (very rare) */
- if (!builder->work)
+ /* didn't get a valid collection previously (very rare) */
+ if (!clt->cl)
goto restart_now;
goto hitted;
}
/* go ahead the next map_blocks */
debugln("%s: [out-of-range] pos %llu", __func__, offset + cur);
- if (z_erofs_vle_work_iter_end(builder))
+ if (z_erofs_collector_end(clt))
fe->backmost = false;
map->m_la = offset + cur;
map->m_llen = 0;
- err = z_erofs_map_blocks_iter(fe->inode, map, 0);
+ err = z_erofs_map_blocks_iter(inode, map, 0);
if (unlikely(err))
goto err_out;
if (unlikely(!(map->m_flags & EROFS_MAP_MAPPED)))
goto hitted;
- DBG_BUGON(map->m_plen != 1 << sbi->clusterbits);
- DBG_BUGON(erofs_blkoff(map->m_pa));
-
- err = z_erofs_vle_work_iter_begin(builder, sb, map, &fe->owned_head);
+ err = z_erofs_collector_begin(clt, inode, map);
if (unlikely(err))
goto err_out;
else
cache_strategy = DONTALLOC;
- preload_compressed_pages(builder, MNGD_MAPPING(sbi),
- map->m_pa / PAGE_SIZE,
- map->m_plen / PAGE_SIZE,
- cache_strategy, page_pool, GFP_KERNEL);
+ preload_compressed_pages(clt, MNGD_MAPPING(sbi),
+ cache_strategy, pagepool);
- tight &= builder_is_hooked(builder);
- work = builder->work;
+ tight &= (clt->mode >= COLLECT_PRIMARY_HOOKED);
hitted:
cur = end - min_t(unsigned int, offset + end - map->m_la, end);
if (unlikely(!(map->m_flags & EROFS_MAP_MAPPED))) {
Z_EROFS_VLE_PAGE_TYPE_TAIL_SHARED));
if (cur)
- tight &= builder_is_followed(builder);
+ tight &= (clt->mode >= COLLECT_PRIMARY_FOLLOWED);
retry:
- err = z_erofs_vle_work_add_page(builder, page, page_type);
+ err = z_erofs_attach_page(clt, page, page_type);
/* should allocate an additional staging page for pagevec */
if (err == -EAGAIN) {
struct page *const newpage =
- __stagingpage_alloc(page_pool, GFP_NOFS);
+ __stagingpage_alloc(pagepool, GFP_NOFS);
- err = z_erofs_vle_work_add_page(builder, newpage,
- Z_EROFS_PAGE_TYPE_EXCLUSIVE);
+ err = z_erofs_attach_page(clt, newpage,
+ Z_EROFS_PAGE_TYPE_EXCLUSIVE);
if (likely(!err))
goto retry;
}
if (unlikely(err))
goto err_out;
- index = page->index - map->m_la / PAGE_SIZE;
+ index = page->index - (map->m_la >> PAGE_SHIFT);
- /* FIXME! avoid the last relundant fixup & endio */
z_erofs_onlinepage_fixup(page, index, true);
/* bump up the number of spiltted parts of a page */
++spiltted;
/* also update nr_pages */
- work->nr_pages = max_t(pgoff_t, work->nr_pages, index + 1);
+ clt->cl->nr_pages = max_t(pgoff_t, clt->cl->nr_pages, index + 1);
next_part:
/* can be used for verification */
map->m_llen = offset + cur - map->m_la;
goto repeat;
out:
- /* FIXME! avoid the last relundant fixup & endio */
z_erofs_onlinepage_endio(page);
debugln("%s, finish page: %pK spiltted: %u map->m_llen %llu",
static void z_erofs_vle_unzip_kickoff(void *ptr, int bios)
{
tagptr1_t t = tagptr_init(tagptr1_t, ptr);
- struct z_erofs_vle_unzip_io *io = tagptr_unfold_ptr(t);
+ struct z_erofs_unzip_io *io = tagptr_unfold_ptr(t);
bool background = tagptr_unfold_tags(t);
if (!background) {
bio_put(bio);
}
-static struct page *z_pagemap_global[Z_EROFS_VLE_VMAP_GLOBAL_PAGES];
-static DEFINE_MUTEX(z_pagemap_global_lock);
-
-static int z_erofs_vle_unzip(struct super_block *sb,
- struct z_erofs_vle_workgroup *grp,
- struct list_head *page_pool)
+static int z_erofs_decompress_pcluster(struct super_block *sb,
+ struct z_erofs_pcluster *pcl,
+ struct list_head *pagepool)
{
struct erofs_sb_info *const sbi = EROFS_SB(sb);
- const unsigned int clusterpages = erofs_clusterpages(sbi);
-
+ const unsigned int clusterpages = BIT(pcl->clusterbits);
struct z_erofs_pagevec_ctor ctor;
- unsigned int nr_pages;
- unsigned int sparsemem_pages = 0;
- struct page *pages_onstack[Z_EROFS_VLE_VMAP_ONSTACK_PAGES];
+ unsigned int i, outputsize, llen, nr_pages;
+ struct page *pages_onstack[Z_EROFS_VMAP_ONSTACK_PAGES];
struct page **pages, **compressed_pages, *page;
- unsigned int algorithm;
- unsigned int i, outputsize;
enum z_erofs_page_type page_type;
bool overlapped, partial;
- struct z_erofs_vle_work *work;
+ struct z_erofs_collection *cl;
int err;
might_sleep();
- work = z_erofs_vle_grab_primary_work(grp);
- DBG_BUGON(!READ_ONCE(work->nr_pages));
+ cl = z_erofs_primarycollection(pcl);
+ DBG_BUGON(!READ_ONCE(cl->nr_pages));
- mutex_lock(&work->lock);
- nr_pages = work->nr_pages;
+ mutex_lock(&cl->lock);
+ nr_pages = cl->nr_pages;
- if (likely(nr_pages <= Z_EROFS_VLE_VMAP_ONSTACK_PAGES))
+ if (likely(nr_pages <= Z_EROFS_VMAP_ONSTACK_PAGES)) {
pages = pages_onstack;
- else if (nr_pages <= Z_EROFS_VLE_VMAP_GLOBAL_PAGES &&
- mutex_trylock(&z_pagemap_global_lock))
+ } else if (nr_pages <= Z_EROFS_VMAP_GLOBAL_PAGES &&
+ mutex_trylock(&z_pagemap_global_lock)) {
pages = z_pagemap_global;
- else {
+ } else {
gfp_t gfp_flags = GFP_KERNEL;
- if (nr_pages > Z_EROFS_VLE_VMAP_GLOBAL_PAGES)
+ if (nr_pages > Z_EROFS_VMAP_GLOBAL_PAGES)
gfp_flags |= __GFP_NOFAIL;
pages = kvmalloc_array(nr_pages, sizeof(struct page *),
pages[i] = NULL;
z_erofs_pagevec_ctor_init(&ctor, Z_EROFS_NR_INLINE_PAGEVECS,
- work->pagevec, 0);
+ cl->pagevec, 0);
- for (i = 0; i < work->vcnt; ++i) {
+ for (i = 0; i < cl->vcnt; ++i) {
unsigned int pagenr;
page = z_erofs_pagevec_dequeue(&ctor, &page_type);
DBG_BUGON(!page);
DBG_BUGON(!page->mapping);
- if (z_erofs_put_stagingpage(page_pool, page))
+ if (z_erofs_put_stagingpage(pagepool, page))
continue;
if (page_type == Z_EROFS_VLE_PAGE_TYPE_HEAD)
pages[pagenr] = page;
}
- sparsemem_pages = i;
-
z_erofs_pagevec_ctor_exit(&ctor, true);
overlapped = false;
- compressed_pages = grp->compressed_pages;
+ compressed_pages = pcl->compressed_pages;
err = 0;
for (i = 0; i < clusterpages; ++i) {
DBG_BUGON(pagenr >= nr_pages);
DBG_BUGON(pages[pagenr]);
- ++sparsemem_pages;
pages[pagenr] = page;
overlapped = true;
if (unlikely(err))
goto out;
- if (nr_pages << PAGE_SHIFT >= work->pageofs + grp->llen) {
- outputsize = grp->llen;
- partial = !(grp->flags & Z_EROFS_VLE_WORKGRP_FULL_LENGTH);
+ llen = pcl->length >> Z_EROFS_PCLUSTER_LENGTH_BIT;
+ if (nr_pages << PAGE_SHIFT >= cl->pageofs + llen) {
+ outputsize = llen;
+ partial = !(pcl->length & Z_EROFS_PCLUSTER_FULL_LENGTH);
} else {
- outputsize = (nr_pages << PAGE_SHIFT) - work->pageofs;
+ outputsize = (nr_pages << PAGE_SHIFT) - cl->pageofs;
partial = true;
}
- if (z_erofs_vle_workgrp_fmt(grp) == Z_EROFS_VLE_WORKGRP_FMT_PLAIN)
- algorithm = Z_EROFS_COMPRESSION_SHIFTED;
- else
- algorithm = Z_EROFS_COMPRESSION_LZ4;
-
err = z_erofs_decompress(&(struct z_erofs_decompress_req) {
.sb = sb,
.in = compressed_pages,
.out = pages,
- .pageofs_out = work->pageofs,
+ .pageofs_out = cl->pageofs,
.inputsize = PAGE_SIZE,
.outputsize = outputsize,
- .alg = algorithm,
+ .alg = pcl->algorithmformat,
.inplace_io = overlapped,
.partial_decoding = partial
- }, page_pool);
+ }, pagepool);
out:
/* must handle all compressed pages before endding pages */
continue;
/* recycle all individual staging pages */
- (void)z_erofs_put_stagingpage(page_pool, page);
+ (void)z_erofs_put_stagingpage(pagepool, page);
WRITE_ONCE(compressed_pages[i], NULL);
}
DBG_BUGON(!page->mapping);
/* recycle all individual staging pages */
- if (z_erofs_put_stagingpage(page_pool, page))
+ if (z_erofs_put_stagingpage(pagepool, page))
continue;
if (unlikely(err < 0))
else if (unlikely(pages != pages_onstack))
kvfree(pages);
- work->nr_pages = 0;
- work->vcnt = 0;
+ cl->nr_pages = 0;
+ cl->vcnt = 0;
- /* all work locks MUST be taken before the following line */
+ /* all cl locks MUST be taken before the following line */
+ WRITE_ONCE(pcl->next, Z_EROFS_PCLUSTER_NIL);
- WRITE_ONCE(grp->next, Z_EROFS_VLE_WORKGRP_NIL);
+ /* all cl locks SHOULD be released right now */
+ mutex_unlock(&cl->lock);
- /* all work locks SHOULD be released right now */
- mutex_unlock(&work->lock);
-
- z_erofs_vle_work_release(work);
+ z_erofs_collection_put(cl);
return err;
}
static void z_erofs_vle_unzip_all(struct super_block *sb,
- struct z_erofs_vle_unzip_io *io,
- struct list_head *page_pool)
+ struct z_erofs_unzip_io *io,
+ struct list_head *pagepool)
{
- z_erofs_vle_owned_workgrp_t owned = io->head;
+ z_erofs_next_pcluster_t owned = io->head;
- while (owned != Z_EROFS_VLE_WORKGRP_TAIL_CLOSED) {
- struct z_erofs_vle_workgroup *grp;
+ while (owned != Z_EROFS_PCLUSTER_TAIL_CLOSED) {
+ struct z_erofs_pcluster *pcl;
/* no possible that 'owned' equals Z_EROFS_WORK_TPTR_TAIL */
- DBG_BUGON(owned == Z_EROFS_VLE_WORKGRP_TAIL);
+ DBG_BUGON(owned == Z_EROFS_PCLUSTER_TAIL);
/* no possible that 'owned' equals NULL */
- DBG_BUGON(owned == Z_EROFS_VLE_WORKGRP_NIL);
+ DBG_BUGON(owned == Z_EROFS_PCLUSTER_NIL);
- grp = container_of(owned, struct z_erofs_vle_workgroup, next);
- owned = READ_ONCE(grp->next);
+ pcl = container_of(owned, struct z_erofs_pcluster, next);
+ owned = READ_ONCE(pcl->next);
- z_erofs_vle_unzip(sb, grp, page_pool);
+ z_erofs_decompress_pcluster(sb, pcl, pagepool);
}
}
static void z_erofs_vle_unzip_wq(struct work_struct *work)
{
- struct z_erofs_vle_unzip_io_sb *iosb = container_of(work,
- struct z_erofs_vle_unzip_io_sb, io.u.work);
- LIST_HEAD(page_pool);
+ struct z_erofs_unzip_io_sb *iosb =
+ container_of(work, struct z_erofs_unzip_io_sb, io.u.work);
+ LIST_HEAD(pagepool);
- DBG_BUGON(iosb->io.head == Z_EROFS_VLE_WORKGRP_TAIL_CLOSED);
- z_erofs_vle_unzip_all(iosb->sb, &iosb->io, &page_pool);
+ DBG_BUGON(iosb->io.head == Z_EROFS_PCLUSTER_TAIL_CLOSED);
+ z_erofs_vle_unzip_all(iosb->sb, &iosb->io, &pagepool);
- put_pages_list(&page_pool);
+ put_pages_list(&pagepool);
kvfree(iosb);
}
-static struct page *
-pickup_page_for_submission(struct z_erofs_vle_workgroup *grp,
- unsigned int nr,
- struct list_head *pagepool,
- struct address_space *mc,
- gfp_t gfp)
+static struct page *pickup_page_for_submission(struct z_erofs_pcluster *pcl,
+ unsigned int nr,
+ struct list_head *pagepool,
+ struct address_space *mc,
+ gfp_t gfp)
{
/* determined at compile time to avoid too many #ifdefs */
const bool nocache = __builtin_constant_p(mc) ? !mc : false;
- const pgoff_t index = grp->obj.index;
+ const pgoff_t index = pcl->obj.index;
bool tocache = false;
struct address_space *mapping;
int justfound;
repeat:
- page = READ_ONCE(grp->compressed_pages[nr]);
+ page = READ_ONCE(pcl->compressed_pages[nr]);
oldpage = page;
if (!page)
/* the page is still in manage cache */
if (page->mapping == mc) {
- WRITE_ONCE(grp->compressed_pages[nr], page);
+ WRITE_ONCE(pcl->compressed_pages[nr], page);
ClearPageError(page);
if (!PagePrivate(page)) {
DBG_BUGON(!justfound);
justfound = 0;
- set_page_private(page, (unsigned long)grp);
+ set_page_private(page, (unsigned long)pcl);
SetPagePrivate(page);
}
put_page(page);
out_allocpage:
page = __stagingpage_alloc(pagepool, gfp);
- if (oldpage != cmpxchg(&grp->compressed_pages[nr], oldpage, page)) {
+ if (oldpage != cmpxchg(&pcl->compressed_pages[nr], oldpage, page)) {
list_add(&page->lru, pagepool);
cpu_relax();
goto repeat;
goto out;
}
- set_page_private(page, (unsigned long)grp);
+ set_page_private(page, (unsigned long)pcl);
SetPagePrivate(page);
out: /* the only exit (for tracing and debugging) */
return page;
}
-static struct z_erofs_vle_unzip_io *
-jobqueue_init(struct super_block *sb,
- struct z_erofs_vle_unzip_io *io,
- bool foreground)
+static struct z_erofs_unzip_io *jobqueue_init(struct super_block *sb,
+ struct z_erofs_unzip_io *io,
+ bool foreground)
{
- struct z_erofs_vle_unzip_io_sb *iosb;
+ struct z_erofs_unzip_io_sb *iosb;
if (foreground) {
/* waitqueue available for foreground io */
iosb->sb = sb;
INIT_WORK(&io->u.work, z_erofs_vle_unzip_wq);
out:
- io->head = Z_EROFS_VLE_WORKGRP_TAIL_CLOSED;
+ io->head = Z_EROFS_PCLUSTER_TAIL_CLOSED;
return io;
}
-/* define workgroup jobqueue types */
+/* define decompression jobqueue types */
enum {
#ifdef EROFS_FS_HAS_MANAGED_CACHE
JQ_BYPASS,
};
static void *jobqueueset_init(struct super_block *sb,
- z_erofs_vle_owned_workgrp_t qtail[],
- struct z_erofs_vle_unzip_io *q[],
- struct z_erofs_vle_unzip_io *fgq,
+ z_erofs_next_pcluster_t qtail[],
+ struct z_erofs_unzip_io *q[],
+ struct z_erofs_unzip_io *fgq,
bool forcefg)
{
#ifdef EROFS_FS_HAS_MANAGED_CACHE
/*
* if managed cache is enabled, bypass jobqueue is needed,
- * no need to read from device for all workgroups in this queue.
+ * no need to read from device for all pclusters in this queue.
*/
q[JQ_BYPASS] = jobqueue_init(sb, fgq + JQ_BYPASS, true);
qtail[JQ_BYPASS] = &q[JQ_BYPASS]->head;
}
#ifdef EROFS_FS_HAS_MANAGED_CACHE
-static void move_to_bypass_jobqueue(struct z_erofs_vle_workgroup *grp,
- z_erofs_vle_owned_workgrp_t qtail[],
- z_erofs_vle_owned_workgrp_t owned_head)
+static void move_to_bypass_jobqueue(struct z_erofs_pcluster *pcl,
+ z_erofs_next_pcluster_t qtail[],
+ z_erofs_next_pcluster_t owned_head)
{
- z_erofs_vle_owned_workgrp_t *const submit_qtail = qtail[JQ_SUBMIT];
- z_erofs_vle_owned_workgrp_t *const bypass_qtail = qtail[JQ_BYPASS];
+ z_erofs_next_pcluster_t *const submit_qtail = qtail[JQ_SUBMIT];
+ z_erofs_next_pcluster_t *const bypass_qtail = qtail[JQ_BYPASS];
- DBG_BUGON(owned_head == Z_EROFS_VLE_WORKGRP_TAIL_CLOSED);
- if (owned_head == Z_EROFS_VLE_WORKGRP_TAIL)
- owned_head = Z_EROFS_VLE_WORKGRP_TAIL_CLOSED;
+ DBG_BUGON(owned_head == Z_EROFS_PCLUSTER_TAIL_CLOSED);
+ if (owned_head == Z_EROFS_PCLUSTER_TAIL)
+ owned_head = Z_EROFS_PCLUSTER_TAIL_CLOSED;
- WRITE_ONCE(grp->next, Z_EROFS_VLE_WORKGRP_TAIL_CLOSED);
+ WRITE_ONCE(pcl->next, Z_EROFS_PCLUSTER_TAIL_CLOSED);
WRITE_ONCE(*submit_qtail, owned_head);
- WRITE_ONCE(*bypass_qtail, &grp->next);
+ WRITE_ONCE(*bypass_qtail, &pcl->next);
- qtail[JQ_BYPASS] = &grp->next;
+ qtail[JQ_BYPASS] = &pcl->next;
}
-static bool postsubmit_is_all_bypassed(struct z_erofs_vle_unzip_io *q[],
+static bool postsubmit_is_all_bypassed(struct z_erofs_unzip_io *q[],
unsigned int nr_bios,
bool force_fg)
{
if (force_fg || nr_bios)
return false;
- kvfree(container_of(q[JQ_SUBMIT],
- struct z_erofs_vle_unzip_io_sb,
- io));
+ kvfree(container_of(q[JQ_SUBMIT], struct z_erofs_unzip_io_sb, io));
return true;
}
#else
-static void move_to_bypass_jobqueue(struct z_erofs_vle_workgroup *grp,
- z_erofs_vle_owned_workgrp_t qtail[],
- z_erofs_vle_owned_workgrp_t owned_head)
+static void move_to_bypass_jobqueue(struct z_erofs_pcluster *pcl,
+ z_erofs_next_pcluster_t qtail[],
+ z_erofs_next_pcluster_t owned_head)
{
/* impossible to bypass submission for managed cache disabled */
DBG_BUGON(1);
}
-static bool postsubmit_is_all_bypassed(struct z_erofs_vle_unzip_io *q[],
+static bool postsubmit_is_all_bypassed(struct z_erofs_unzip_io *q[],
unsigned int nr_bios,
bool force_fg)
{
#endif
static bool z_erofs_vle_submit_all(struct super_block *sb,
- z_erofs_vle_owned_workgrp_t owned_head,
+ z_erofs_next_pcluster_t owned_head,
struct list_head *pagepool,
- struct z_erofs_vle_unzip_io *fgq,
+ struct z_erofs_unzip_io *fgq,
bool force_fg)
{
- struct erofs_sb_info *const sbi = EROFS_SB(sb);
- const unsigned int clusterpages = erofs_clusterpages(sbi);
- const gfp_t gfp = GFP_NOFS;
-
- z_erofs_vle_owned_workgrp_t qtail[NR_JOBQUEUES];
- struct z_erofs_vle_unzip_io *q[NR_JOBQUEUES];
+ struct erofs_sb_info *const sbi __maybe_unused = EROFS_SB(sb);
+ z_erofs_next_pcluster_t qtail[NR_JOBQUEUES];
+ struct z_erofs_unzip_io *q[NR_JOBQUEUES];
struct bio *bio;
void *bi_private;
/* since bio will be NULL, no need to initialize last_index */
bool force_submit = false;
unsigned int nr_bios;
- if (unlikely(owned_head == Z_EROFS_VLE_WORKGRP_TAIL))
+ if (unlikely(owned_head == Z_EROFS_PCLUSTER_TAIL))
return false;
force_submit = false;
q[JQ_SUBMIT]->head = owned_head;
do {
- struct z_erofs_vle_workgroup *grp;
+ struct z_erofs_pcluster *pcl;
+ unsigned int clusterpages;
pgoff_t first_index;
struct page *page;
unsigned int i = 0, bypass = 0;
int err;
/* no possible 'owned_head' equals the following */
- DBG_BUGON(owned_head == Z_EROFS_VLE_WORKGRP_TAIL_CLOSED);
- DBG_BUGON(owned_head == Z_EROFS_VLE_WORKGRP_NIL);
+ DBG_BUGON(owned_head == Z_EROFS_PCLUSTER_TAIL_CLOSED);
+ DBG_BUGON(owned_head == Z_EROFS_PCLUSTER_NIL);
+
+ pcl = container_of(owned_head, struct z_erofs_pcluster, next);
- grp = container_of(owned_head,
- struct z_erofs_vle_workgroup, next);
+ clusterpages = BIT(pcl->clusterbits);
/* close the main owned chain at first */
- owned_head = cmpxchg(&grp->next, Z_EROFS_VLE_WORKGRP_TAIL,
- Z_EROFS_VLE_WORKGRP_TAIL_CLOSED);
+ owned_head = cmpxchg(&pcl->next, Z_EROFS_PCLUSTER_TAIL,
+ Z_EROFS_PCLUSTER_TAIL_CLOSED);
- first_index = grp->obj.index;
+ first_index = pcl->obj.index;
force_submit |= (first_index != last_index + 1);
repeat:
- page = pickup_page_for_submission(grp, i, pagepool,
- MNGD_MAPPING(sbi), gfp);
+ page = pickup_page_for_submission(pcl, i, pagepool,
+ MNGD_MAPPING(sbi),
+ GFP_NOFS);
if (!page) {
force_submit = true;
++bypass;
goto repeat;
if (bypass < clusterpages)
- qtail[JQ_SUBMIT] = &grp->next;
+ qtail[JQ_SUBMIT] = &pcl->next;
else
- move_to_bypass_jobqueue(grp, qtail, owned_head);
- } while (owned_head != Z_EROFS_VLE_WORKGRP_TAIL);
+ move_to_bypass_jobqueue(pcl, qtail, owned_head);
+ } while (owned_head != Z_EROFS_PCLUSTER_TAIL);
if (bio)
__submit_bio(bio, REQ_OP_READ, 0);
return true;
}
-static void z_erofs_submit_and_unzip(struct z_erofs_vle_frontend *f,
+static void z_erofs_submit_and_unzip(struct super_block *sb,
+ struct z_erofs_collector *clt,
struct list_head *pagepool,
bool force_fg)
{
- struct super_block *sb = f->inode->i_sb;
- struct z_erofs_vle_unzip_io io[NR_JOBQUEUES];
+ struct z_erofs_unzip_io io[NR_JOBQUEUES];
- if (!z_erofs_vle_submit_all(sb, f->owned_head, pagepool, io, force_fg))
+ if (!z_erofs_vle_submit_all(sb, clt->owned_head,
+ pagepool, io, force_fg))
return;
#ifdef EROFS_FS_HAS_MANAGED_CACHE
+ /* decompress no I/O pclusters immediately */
z_erofs_vle_unzip_all(sb, &io[JQ_BYPASS], pagepool);
#endif
if (!force_fg)
struct page *page)
{
struct inode *const inode = page->mapping->host;
- struct z_erofs_vle_frontend f = VLE_FRONTEND_INIT(inode);
+ struct z_erofs_decompress_frontend f = DECOMPRESS_FRONTEND_INIT(inode);
int err;
LIST_HEAD(pagepool);
f.headoffset = (erofs_off_t)page->index << PAGE_SHIFT;
err = z_erofs_do_read_page(&f, page, &pagepool);
- (void)z_erofs_vle_work_iter_end(&f.builder);
+ (void)z_erofs_collector_end(&f.clt);
if (err) {
errln("%s, failed to read, err [%d]", __func__, err);
goto out;
}
- z_erofs_submit_and_unzip(&f, &pagepool, true);
+ z_erofs_submit_and_unzip(inode->i_sb, &f.clt, &pagepool, true);
out:
if (f.map.mpage)
put_page(f.map.mpage);
struct erofs_sb_info *const sbi = EROFS_I_SB(inode);
bool sync = should_decompress_synchronously(sbi, nr_pages);
- struct z_erofs_vle_frontend f = VLE_FRONTEND_INIT(inode);
+ struct z_erofs_decompress_frontend f = DECOMPRESS_FRONTEND_INIT(inode);
gfp_t gfp = mapping_gfp_constraint(mapping, GFP_KERNEL);
struct page *head = NULL;
LIST_HEAD(pagepool);
errln("%s, readahead error at page %lu of nid %llu",
__func__, page->index, vi->nid);
}
-
put_page(page);
}
- (void)z_erofs_vle_work_iter_end(&f.builder);
+ (void)z_erofs_collector_end(&f.clt);
- z_erofs_submit_and_unzip(&f, &pagepool, sync);
+ z_erofs_submit_and_unzip(inode->i_sb, &f.clt, &pagepool, sync);
if (f.map.mpage)
put_page(f.map.mpage);
projects / linux.git / commitdiff