erofs: get rid of `struct z_erofs_collector'
Avoid `struct z_erofs_collector' since there is another context structure called "struct z_erofs_decompress_frontend". No logic changes. Link: https://lore.kernel.org/r/20220301194951.106227-1-hsiangkao@linux.alibaba.com Reviewed-by: Yue Hu <huyue2@coolpad.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
This commit is contained in:
parent
ed6e0401e6
commit
5c6dcc57e2
163
fs/erofs/zdata.c
163
fs/erofs/zdata.c
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@ -192,7 +192,10 @@ enum z_erofs_collectmode {
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COLLECT_PRIMARY_FOLLOWED,
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};
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struct z_erofs_collector {
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struct z_erofs_decompress_frontend {
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struct inode *const inode;
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struct erofs_map_blocks map;
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struct z_erofs_pagevec_ctor vector;
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struct z_erofs_pcluster *pcl, *tailpcl;
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@ -202,13 +205,6 @@ struct z_erofs_collector {
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z_erofs_next_pcluster_t owned_head;
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enum z_erofs_collectmode mode;
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};
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struct z_erofs_decompress_frontend {
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struct inode *const inode;
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struct z_erofs_collector clt;
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struct erofs_map_blocks map;
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bool readahead;
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/* used for applying cache strategy on the fly */
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@ -216,30 +212,26 @@ struct z_erofs_decompress_frontend {
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erofs_off_t headoffset;
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};
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#define COLLECTOR_INIT() { \
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.owned_head = Z_EROFS_PCLUSTER_TAIL, \
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.mode = COLLECT_PRIMARY_FOLLOWED }
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#define DECOMPRESS_FRONTEND_INIT(__i) { \
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.inode = __i, .clt = COLLECTOR_INIT(), \
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.backmost = true, }
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.inode = __i, .owned_head = Z_EROFS_PCLUSTER_TAIL, \
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.mode = COLLECT_PRIMARY_FOLLOWED }
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static struct page *z_pagemap_global[Z_EROFS_VMAP_GLOBAL_PAGES];
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static DEFINE_MUTEX(z_pagemap_global_lock);
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static void preload_compressed_pages(struct z_erofs_collector *clt,
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static void preload_compressed_pages(struct z_erofs_decompress_frontend *fe,
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struct address_space *mc,
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enum z_erofs_cache_alloctype type,
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struct page **pagepool)
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{
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struct z_erofs_pcluster *pcl = clt->pcl;
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struct z_erofs_pcluster *pcl = fe->pcl;
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bool standalone = true;
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gfp_t gfp = (mapping_gfp_mask(mc) & ~__GFP_DIRECT_RECLAIM) |
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__GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN;
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struct page **pages;
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pgoff_t index;
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if (clt->mode < COLLECT_PRIMARY_FOLLOWED)
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if (fe->mode < COLLECT_PRIMARY_FOLLOWED)
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return;
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pages = pcl->compressed_pages;
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@ -288,7 +280,7 @@ static void preload_compressed_pages(struct z_erofs_collector *clt,
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* managed cache since it can be moved to the bypass queue instead.
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*/
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if (standalone)
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clt->mode = COLLECT_PRIMARY_FOLLOWED_NOINPLACE;
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fe->mode = COLLECT_PRIMARY_FOLLOWED_NOINPLACE;
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}
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/* called by erofs_shrinker to get rid of all compressed_pages */
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@ -350,47 +342,47 @@ int erofs_try_to_free_cached_page(struct page *page)
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}
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/* page_type must be Z_EROFS_PAGE_TYPE_EXCLUSIVE */
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static bool z_erofs_try_inplace_io(struct z_erofs_collector *clt,
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static bool z_erofs_try_inplace_io(struct z_erofs_decompress_frontend *fe,
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struct page *page)
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{
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struct z_erofs_pcluster *const pcl = clt->pcl;
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struct z_erofs_pcluster *const pcl = fe->pcl;
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while (clt->icpage_ptr > pcl->compressed_pages)
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if (!cmpxchg(--clt->icpage_ptr, NULL, page))
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while (fe->icpage_ptr > pcl->compressed_pages)
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if (!cmpxchg(--fe->icpage_ptr, NULL, page))
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return true;
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return false;
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}
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/* callers must be with collection lock held */
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static int z_erofs_attach_page(struct z_erofs_collector *clt,
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static int z_erofs_attach_page(struct z_erofs_decompress_frontend *fe,
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struct page *page, enum z_erofs_page_type type,
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bool pvec_safereuse)
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{
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int ret;
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/* give priority for inplaceio */
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if (clt->mode >= COLLECT_PRIMARY &&
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if (fe->mode >= COLLECT_PRIMARY &&
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type == Z_EROFS_PAGE_TYPE_EXCLUSIVE &&
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z_erofs_try_inplace_io(clt, page))
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z_erofs_try_inplace_io(fe, page))
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return 0;
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ret = z_erofs_pagevec_enqueue(&clt->vector, page, type,
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ret = z_erofs_pagevec_enqueue(&fe->vector, page, type,
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pvec_safereuse);
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clt->cl->vcnt += (unsigned int)ret;
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fe->cl->vcnt += (unsigned int)ret;
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return ret ? 0 : -EAGAIN;
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}
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static void z_erofs_try_to_claim_pcluster(struct z_erofs_collector *clt)
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static void z_erofs_try_to_claim_pcluster(struct z_erofs_decompress_frontend *f)
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{
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struct z_erofs_pcluster *pcl = clt->pcl;
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z_erofs_next_pcluster_t *owned_head = &clt->owned_head;
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struct z_erofs_pcluster *pcl = f->pcl;
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z_erofs_next_pcluster_t *owned_head = &f->owned_head;
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/* type 1, nil pcluster (this pcluster doesn't belong to any chain.) */
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if (cmpxchg(&pcl->next, Z_EROFS_PCLUSTER_NIL,
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*owned_head) == Z_EROFS_PCLUSTER_NIL) {
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*owned_head = &pcl->next;
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/* so we can attach this pcluster to our submission chain. */
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clt->mode = COLLECT_PRIMARY_FOLLOWED;
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f->mode = COLLECT_PRIMARY_FOLLOWED;
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return;
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}
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@ -401,24 +393,24 @@ static void z_erofs_try_to_claim_pcluster(struct z_erofs_collector *clt)
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if (cmpxchg(&pcl->next, Z_EROFS_PCLUSTER_TAIL,
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*owned_head) == Z_EROFS_PCLUSTER_TAIL) {
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*owned_head = Z_EROFS_PCLUSTER_TAIL;
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clt->mode = COLLECT_PRIMARY_HOOKED;
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clt->tailpcl = NULL;
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f->mode = COLLECT_PRIMARY_HOOKED;
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f->tailpcl = NULL;
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return;
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}
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/* type 3, it belongs to a chain, but it isn't the end of the chain */
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clt->mode = COLLECT_PRIMARY;
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f->mode = COLLECT_PRIMARY;
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}
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static int z_erofs_lookup_collection(struct z_erofs_collector *clt,
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static int z_erofs_lookup_collection(struct z_erofs_decompress_frontend *fe,
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struct inode *inode,
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struct erofs_map_blocks *map)
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{
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struct z_erofs_pcluster *pcl = clt->pcl;
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struct z_erofs_pcluster *pcl = fe->pcl;
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struct z_erofs_collection *cl;
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unsigned int length;
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/* to avoid unexpected loop formed by corrupted images */
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if (clt->owned_head == &pcl->next || pcl == clt->tailpcl) {
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if (fe->owned_head == &pcl->next || pcl == fe->tailpcl) {
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DBG_BUGON(1);
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return -EFSCORRUPTED;
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}
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@ -449,15 +441,15 @@ static int z_erofs_lookup_collection(struct z_erofs_collector *clt,
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}
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mutex_lock(&cl->lock);
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/* used to check tail merging loop due to corrupted images */
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if (clt->owned_head == Z_EROFS_PCLUSTER_TAIL)
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clt->tailpcl = pcl;
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if (fe->owned_head == Z_EROFS_PCLUSTER_TAIL)
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fe->tailpcl = pcl;
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z_erofs_try_to_claim_pcluster(clt);
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clt->cl = cl;
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z_erofs_try_to_claim_pcluster(fe);
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fe->cl = cl;
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return 0;
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}
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static int z_erofs_register_collection(struct z_erofs_collector *clt,
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static int z_erofs_register_collection(struct z_erofs_decompress_frontend *fe,
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struct inode *inode,
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struct erofs_map_blocks *map)
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{
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@ -485,8 +477,8 @@ static int z_erofs_register_collection(struct z_erofs_collector *clt,
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Z_EROFS_PCLUSTER_FULL_LENGTH : 0);
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/* new pclusters should be claimed as type 1, primary and followed */
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pcl->next = clt->owned_head;
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clt->mode = COLLECT_PRIMARY_FOLLOWED;
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pcl->next = fe->owned_head;
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fe->mode = COLLECT_PRIMARY_FOLLOWED;
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cl = z_erofs_primarycollection(pcl);
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cl->pageofs = map->m_la & ~PAGE_MASK;
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@ -512,18 +504,18 @@ static int z_erofs_register_collection(struct z_erofs_collector *clt,
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}
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if (grp != &pcl->obj) {
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clt->pcl = container_of(grp,
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fe->pcl = container_of(grp,
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struct z_erofs_pcluster, obj);
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err = -EEXIST;
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goto err_out;
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}
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}
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/* used to check tail merging loop due to corrupted images */
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if (clt->owned_head == Z_EROFS_PCLUSTER_TAIL)
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clt->tailpcl = pcl;
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clt->owned_head = &pcl->next;
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clt->pcl = pcl;
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clt->cl = cl;
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if (fe->owned_head == Z_EROFS_PCLUSTER_TAIL)
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fe->tailpcl = pcl;
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fe->owned_head = &pcl->next;
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fe->pcl = pcl;
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fe->cl = cl;
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return 0;
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err_out:
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@ -532,18 +524,18 @@ err_out:
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return err;
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}
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static int z_erofs_collector_begin(struct z_erofs_collector *clt,
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static int z_erofs_collector_begin(struct z_erofs_decompress_frontend *fe,
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struct inode *inode,
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struct erofs_map_blocks *map)
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{
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struct erofs_workgroup *grp;
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int ret;
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DBG_BUGON(clt->cl);
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DBG_BUGON(fe->cl);
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/* must be Z_EROFS_PCLUSTER_TAIL or pointed to previous collection */
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DBG_BUGON(clt->owned_head == Z_EROFS_PCLUSTER_NIL);
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DBG_BUGON(clt->owned_head == Z_EROFS_PCLUSTER_TAIL_CLOSED);
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DBG_BUGON(fe->owned_head == Z_EROFS_PCLUSTER_NIL);
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DBG_BUGON(fe->owned_head == Z_EROFS_PCLUSTER_TAIL_CLOSED);
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if (map->m_flags & EROFS_MAP_META) {
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if ((map->m_pa & ~PAGE_MASK) + map->m_plen > PAGE_SIZE) {
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@ -555,28 +547,28 @@ static int z_erofs_collector_begin(struct z_erofs_collector *clt,
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grp = erofs_find_workgroup(inode->i_sb, map->m_pa >> PAGE_SHIFT);
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if (grp) {
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clt->pcl = container_of(grp, struct z_erofs_pcluster, obj);
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fe->pcl = container_of(grp, struct z_erofs_pcluster, obj);
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} else {
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tailpacking:
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ret = z_erofs_register_collection(clt, inode, map);
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ret = z_erofs_register_collection(fe, inode, map);
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if (!ret)
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goto out;
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if (ret != -EEXIST)
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return ret;
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}
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ret = z_erofs_lookup_collection(clt, inode, map);
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ret = z_erofs_lookup_collection(fe, inode, map);
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if (ret) {
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erofs_workgroup_put(&clt->pcl->obj);
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erofs_workgroup_put(&fe->pcl->obj);
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return ret;
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}
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out:
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z_erofs_pagevec_ctor_init(&clt->vector, Z_EROFS_NR_INLINE_PAGEVECS,
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clt->cl->pagevec, clt->cl->vcnt);
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z_erofs_pagevec_ctor_init(&fe->vector, Z_EROFS_NR_INLINE_PAGEVECS,
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fe->cl->pagevec, fe->cl->vcnt);
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/* since file-backed online pages are traversed in reverse order */
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clt->icpage_ptr = clt->pcl->compressed_pages +
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z_erofs_pclusterpages(clt->pcl);
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fe->icpage_ptr = fe->pcl->compressed_pages +
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z_erofs_pclusterpages(fe->pcl);
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return 0;
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}
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@ -610,24 +602,24 @@ static void z_erofs_collection_put(struct z_erofs_collection *cl)
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erofs_workgroup_put(&pcl->obj);
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}
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static bool z_erofs_collector_end(struct z_erofs_collector *clt)
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static bool z_erofs_collector_end(struct z_erofs_decompress_frontend *fe)
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{
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struct z_erofs_collection *cl = clt->cl;
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struct z_erofs_collection *cl = fe->cl;
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if (!cl)
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return false;
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z_erofs_pagevec_ctor_exit(&clt->vector, false);
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z_erofs_pagevec_ctor_exit(&fe->vector, false);
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mutex_unlock(&cl->lock);
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/*
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* if all pending pages are added, don't hold its reference
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* any longer if the pcluster isn't hosted by ourselves.
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*/
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if (clt->mode < COLLECT_PRIMARY_FOLLOWED_NOINPLACE)
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if (fe->mode < COLLECT_PRIMARY_FOLLOWED_NOINPLACE)
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z_erofs_collection_put(cl);
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clt->cl = NULL;
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fe->cl = NULL;
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return true;
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}
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@ -651,7 +643,6 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
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struct inode *const inode = fe->inode;
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struct erofs_sb_info *const sbi = EROFS_I_SB(inode);
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struct erofs_map_blocks *const map = &fe->map;
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struct z_erofs_collector *const clt = &fe->clt;
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const loff_t offset = page_offset(page);
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bool tight = true;
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@ -672,7 +663,7 @@ repeat:
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if (offset + cur >= map->m_la &&
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offset + cur < map->m_la + map->m_llen) {
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/* didn't get a valid collection previously (very rare) */
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if (!clt->cl)
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if (!fe->cl)
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goto restart_now;
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goto hitted;
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}
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@ -680,7 +671,7 @@ repeat:
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/* go ahead the next map_blocks */
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erofs_dbg("%s: [out-of-range] pos %llu", __func__, offset + cur);
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if (z_erofs_collector_end(clt))
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if (z_erofs_collector_end(fe))
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fe->backmost = false;
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map->m_la = offset + cur;
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@ -693,11 +684,11 @@ restart_now:
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if (!(map->m_flags & EROFS_MAP_MAPPED))
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goto hitted;
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err = z_erofs_collector_begin(clt, inode, map);
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err = z_erofs_collector_begin(fe, inode, map);
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if (err)
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goto err_out;
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if (z_erofs_is_inline_pcluster(clt->pcl)) {
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if (z_erofs_is_inline_pcluster(fe->pcl)) {
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void *mp;
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mp = erofs_read_metabuf(&fe->map.buf, inode->i_sb,
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@ -709,8 +700,8 @@ restart_now:
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goto err_out;
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}
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get_page(fe->map.buf.page);
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WRITE_ONCE(clt->pcl->compressed_pages[0], fe->map.buf.page);
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clt->mode = COLLECT_PRIMARY_FOLLOWED_NOINPLACE;
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WRITE_ONCE(fe->pcl->compressed_pages[0], fe->map.buf.page);
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fe->mode = COLLECT_PRIMARY_FOLLOWED_NOINPLACE;
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} else {
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/* preload all compressed pages (can change mode if needed) */
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if (should_alloc_managed_pages(fe, sbi->opt.cache_strategy,
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@ -719,7 +710,7 @@ restart_now:
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else
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cache_strategy = DONTALLOC;
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preload_compressed_pages(clt, MNGD_MAPPING(sbi),
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preload_compressed_pages(fe, MNGD_MAPPING(sbi),
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cache_strategy, pagepool);
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}
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@ -730,8 +721,8 @@ hitted:
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* those chains are handled asynchronously thus the page cannot be used
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* for inplace I/O or pagevec (should be processed in strict order.)
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*/
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tight &= (clt->mode >= COLLECT_PRIMARY_HOOKED &&
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clt->mode != COLLECT_PRIMARY_FOLLOWED_NOINPLACE);
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tight &= (fe->mode >= COLLECT_PRIMARY_HOOKED &&
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fe->mode != COLLECT_PRIMARY_FOLLOWED_NOINPLACE);
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cur = end - min_t(unsigned int, offset + end - map->m_la, end);
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if (!(map->m_flags & EROFS_MAP_MAPPED)) {
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@ -746,18 +737,18 @@ hitted:
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Z_EROFS_VLE_PAGE_TYPE_TAIL_SHARED));
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if (cur)
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tight &= (clt->mode >= COLLECT_PRIMARY_FOLLOWED);
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tight &= (fe->mode >= COLLECT_PRIMARY_FOLLOWED);
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retry:
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err = z_erofs_attach_page(clt, page, page_type,
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clt->mode >= COLLECT_PRIMARY_FOLLOWED);
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err = z_erofs_attach_page(fe, page, page_type,
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fe->mode >= COLLECT_PRIMARY_FOLLOWED);
|
||||
/* should allocate an additional short-lived page for pagevec */
|
||||
if (err == -EAGAIN) {
|
||||
struct page *const newpage =
|
||||
alloc_page(GFP_NOFS | __GFP_NOFAIL);
|
||||
|
||||
set_page_private(newpage, Z_EROFS_SHORTLIVED_PAGE);
|
||||
err = z_erofs_attach_page(clt, newpage,
|
||||
err = z_erofs_attach_page(fe, newpage,
|
||||
Z_EROFS_PAGE_TYPE_EXCLUSIVE, true);
|
||||
if (!err)
|
||||
goto retry;
|
||||
|
|
@ -773,7 +764,7 @@ retry:
|
|||
/* bump up the number of spiltted parts of a page */
|
||||
++spiltted;
|
||||
/* also update nr_pages */
|
||||
clt->cl->nr_pages = max_t(pgoff_t, clt->cl->nr_pages, index + 1);
|
||||
fe->cl->nr_pages = max_t(pgoff_t, fe->cl->nr_pages, index + 1);
|
||||
next_part:
|
||||
/* can be used for verification */
|
||||
map->m_llen = offset + cur - map->m_la;
|
||||
|
|
@ -1309,7 +1300,7 @@ static void z_erofs_submit_queue(struct super_block *sb,
|
|||
z_erofs_next_pcluster_t qtail[NR_JOBQUEUES];
|
||||
struct z_erofs_decompressqueue *q[NR_JOBQUEUES];
|
||||
void *bi_private;
|
||||
z_erofs_next_pcluster_t owned_head = f->clt.owned_head;
|
||||
z_erofs_next_pcluster_t owned_head = f->owned_head;
|
||||
/* bio is NULL initially, so no need to initialize last_{index,bdev} */
|
||||
pgoff_t last_index;
|
||||
struct block_device *last_bdev;
|
||||
|
|
@ -1417,7 +1408,7 @@ static void z_erofs_runqueue(struct super_block *sb,
|
|||
{
|
||||
struct z_erofs_decompressqueue io[NR_JOBQUEUES];
|
||||
|
||||
if (f->clt.owned_head == Z_EROFS_PCLUSTER_TAIL)
|
||||
if (f->owned_head == Z_EROFS_PCLUSTER_TAIL)
|
||||
return;
|
||||
z_erofs_submit_queue(sb, f, pagepool, io, &force_fg);
|
||||
|
||||
|
|
@ -1517,7 +1508,7 @@ static int z_erofs_readpage(struct file *file, struct page *page)
|
|||
err = z_erofs_do_read_page(&f, page, &pagepool);
|
||||
z_erofs_pcluster_readmore(&f, NULL, 0, &pagepool, false);
|
||||
|
||||
(void)z_erofs_collector_end(&f.clt);
|
||||
(void)z_erofs_collector_end(&f);
|
||||
|
||||
/* if some compressed cluster ready, need submit them anyway */
|
||||
z_erofs_runqueue(inode->i_sb, &f, &pagepool,
|
||||
|
|
@ -1567,7 +1558,7 @@ static void z_erofs_readahead(struct readahead_control *rac)
|
|||
put_page(page);
|
||||
}
|
||||
z_erofs_pcluster_readmore(&f, rac, 0, &pagepool, false);
|
||||
(void)z_erofs_collector_end(&f.clt);
|
||||
(void)z_erofs_collector_end(&f);
|
||||
|
||||
z_erofs_runqueue(inode->i_sb, &f, &pagepool,
|
||||
z_erofs_get_sync_decompress_policy(sbi, nr_pages));
|
||||
|
|
|
|||
Loading…
Reference in New Issue