Lines Matching +full:mpm +full:- +full:pin +full:- +full:count
6 * 2000-2001 Christoph Rohland
7 * 2000-2001 SAP AG
9 * Copyright (C) 2002-2011 Hugh Dickins.
11 * Copyright (C) 2002-2005 VERITAS Software Corporation.
18 * tiny-shmem:
19 * Copyright (c) 2004, 2008 Matt Mackall <mpm@selenic.com>
62 #include <linux/backing-dev.h>
102 * inode->i_private (with i_rwsem making sure that it has only one user at
156 return min3(nr_pages - totalhigh_pages(), nr_pages / 2, in shmem_default_max_inodes()
167 return sb->s_fs_info; in SHMEM_SB()
171 * shmem_file_setup pre-accounts the whole fixed size of a VM object,
174 * consistent with the pre-accounting of private mappings ...
179 0 : security_vm_enough_memory_mm(current->mm, VM_ACCT(size)); in shmem_acct_size()
193 return security_vm_enough_memory_mm(current->mm, in shmem_reacct_size()
194 VM_ACCT(newsize) - VM_ACCT(oldsize)); in shmem_reacct_size()
196 vm_unacct_memory(VM_ACCT(oldsize) - VM_ACCT(newsize)); in shmem_reacct_size()
204 * shmem_get_folio reports shmem_acct_blocks failure as -ENOSPC not -ENOMEM,
212 return security_vm_enough_memory_mm(current->mm, in shmem_acct_blocks()
225 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb); in shmem_inode_acct_blocks()
226 int err = -ENOSPC; in shmem_inode_acct_blocks()
228 if (shmem_acct_blocks(info->flags, pages)) in shmem_inode_acct_blocks()
232 if (sbinfo->max_blocks) { in shmem_inode_acct_blocks()
233 if (!percpu_counter_limited_add(&sbinfo->used_blocks, in shmem_inode_acct_blocks()
234 sbinfo->max_blocks, pages)) in shmem_inode_acct_blocks()
239 percpu_counter_sub(&sbinfo->used_blocks, pages); in shmem_inode_acct_blocks()
251 shmem_unacct_blocks(info->flags, pages); in shmem_inode_acct_blocks()
258 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb); in shmem_inode_unacct_blocks()
263 if (sbinfo->max_blocks) in shmem_inode_unacct_blocks()
264 percpu_counter_sub(&sbinfo->used_blocks, pages); in shmem_inode_unacct_blocks()
265 shmem_unacct_blocks(info->flags, pages); in shmem_inode_unacct_blocks()
280 return mapping->a_ops == &shmem_aops; in shmem_mapping()
286 return vma->vm_ops == &shmem_anon_vm_ops; in vma_is_anon_shmem()
291 return vma_is_anon_shmem(vma) || vma->vm_ops == &shmem_vm_ops; in vma_is_shmem()
304 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; in shmem_enable_quotas()
319 for (type--; type >= 0; type--) in shmem_enable_quotas()
334 return SHMEM_I(inode)->i_dquot; in shmem_get_dquots()
353 if (!(sb->s_flags & SB_KERNMOUNT)) { in shmem_reserve_inode()
354 raw_spin_lock(&sbinfo->stat_lock); in shmem_reserve_inode()
355 if (sbinfo->max_inodes) { in shmem_reserve_inode()
356 if (sbinfo->free_ispace < BOGO_INODE_SIZE) { in shmem_reserve_inode()
357 raw_spin_unlock(&sbinfo->stat_lock); in shmem_reserve_inode()
358 return -ENOSPC; in shmem_reserve_inode()
360 sbinfo->free_ispace -= BOGO_INODE_SIZE; in shmem_reserve_inode()
363 ino = sbinfo->next_ino++; in shmem_reserve_inode()
365 ino = sbinfo->next_ino++; in shmem_reserve_inode()
366 if (unlikely(!sbinfo->full_inums && in shmem_reserve_inode()
374 __func__, MINOR(sb->s_dev)); in shmem_reserve_inode()
375 sbinfo->next_ino = 1; in shmem_reserve_inode()
376 ino = sbinfo->next_ino++; in shmem_reserve_inode()
380 raw_spin_unlock(&sbinfo->stat_lock); in shmem_reserve_inode()
383 * __shmem_file_setup, one of our callers, is lock-free: it in shmem_reserve_inode()
386 * unknown contexts. As such, use a per-cpu batched allocator in shmem_reserve_inode()
387 * which doesn't require the per-sb stat_lock unless we are at in shmem_reserve_inode()
396 next_ino = per_cpu_ptr(sbinfo->ino_batch, get_cpu()); in shmem_reserve_inode()
399 raw_spin_lock(&sbinfo->stat_lock); in shmem_reserve_inode()
400 ino = sbinfo->next_ino; in shmem_reserve_inode()
401 sbinfo->next_ino += SHMEM_INO_BATCH; in shmem_reserve_inode()
402 raw_spin_unlock(&sbinfo->stat_lock); in shmem_reserve_inode()
417 if (sbinfo->max_inodes) { in shmem_free_inode()
418 raw_spin_lock(&sbinfo->stat_lock); in shmem_free_inode()
419 sbinfo->free_ispace += BOGO_INODE_SIZE + freed_ispace; in shmem_free_inode()
420 raw_spin_unlock(&sbinfo->stat_lock); in shmem_free_inode()
425 * shmem_recalc_inode - recalculate the block usage of an inode
433 * But normally info->alloced == inode->i_mapping->nrpages + info->swapped
434 * So mm freed is info->alloced - (inode->i_mapping->nrpages + info->swapped)
441 spin_lock(&info->lock); in shmem_recalc_inode()
442 info->alloced += alloced; in shmem_recalc_inode()
443 info->swapped += swapped; in shmem_recalc_inode()
444 freed = info->alloced - info->swapped - in shmem_recalc_inode()
445 READ_ONCE(inode->i_mapping->nrpages); in shmem_recalc_inode()
448 * after i_mapping->nrpages has already been adjusted (up or down), in shmem_recalc_inode()
449 * shmem_writepage() has to raise swapped before nrpages is lowered - in shmem_recalc_inode()
456 info->alloced -= freed; in shmem_recalc_inode()
457 spin_unlock(&info->lock); in shmem_recalc_inode()
466 struct address_space *mapping = inode->i_mapping; in shmem_charge()
472 xa_lock_irq(&mapping->i_pages); in shmem_charge()
473 mapping->nrpages += pages; in shmem_charge()
474 xa_unlock_irq(&mapping->i_pages); in shmem_charge()
494 XA_STATE(xas, &mapping->i_pages, index); in shmem_replace_entry()
501 return -ENOENT; in shmem_replace_entry()
516 return xa_load(&mapping->i_pages, index) == swp_to_radix_entry(swap); in shmem_confirm_swap()
548 #define SHMEM_HUGE_DENY (-1)
549 #define SHMEM_HUGE_FORCE (-2)
558 * shmem_mapping_size_orders - Get allowable folio orders for the given file size.
580 size = write_end - (index << PAGE_SHIFT); in shmem_mapping_size_orders()
586 if (index & ((1UL << order) - 1)) in shmem_mapping_size_orders()
590 return order > 0 ? BIT(order + 1) - 1 : 0; in shmem_mapping_size_orders()
624 if (!S_ISREG(inode->i_mode)) in shmem_huge_global_enabled()
633 * the mTHP interface, so we still use PMD-sized huge order to in shmem_huge_global_enabled()
636 * For tmpfs mmap()'s huge order, we still use PMD-sized order to in shmem_huge_global_enabled()
643 switch (SHMEM_SB(inode->i_sb)->huge) { in shmem_huge_global_enabled()
648 return shmem_mapping_size_orders(inode->i_mapping, index, write_end); in shmem_huge_global_enabled()
653 within_size_orders = shmem_mapping_size_orders(inode->i_mapping, in shmem_huge_global_enabled()
676 return -EINVAL; in shmem_parse_huge()
691 return -EINVAL; in shmem_parse_huge()
695 return -EINVAL; in shmem_parse_huge()
697 /* Do not override huge allocation policy with non-PMD sized mTHP */ in shmem_parse_huge()
700 return -EINVAL; in shmem_parse_huge()
735 unsigned long batch = sc ? sc->nr_to_scan : 128; in shmem_unused_huge_shrink()
738 if (list_empty(&sbinfo->shrinklist)) in shmem_unused_huge_shrink()
741 spin_lock(&sbinfo->shrinklist_lock); in shmem_unused_huge_shrink()
742 list_for_each_safe(pos, next, &sbinfo->shrinklist) { in shmem_unused_huge_shrink()
745 /* pin the inode */ in shmem_unused_huge_shrink()
746 inode = igrab(&info->vfs_inode); in shmem_unused_huge_shrink()
750 list_del_init(&info->shrinklist); in shmem_unused_huge_shrink()
754 list_move(&info->shrinklist, &list); in shmem_unused_huge_shrink()
756 sbinfo->shrinklist_len--; in shmem_unused_huge_shrink()
757 if (!--batch) in shmem_unused_huge_shrink()
760 spin_unlock(&sbinfo->shrinklist_lock); in shmem_unused_huge_shrink()
768 inode = &info->vfs_inode; in shmem_unused_huge_shrink()
774 folio = filemap_get_entry(inode->i_mapping, i_size / PAGE_SIZE); in shmem_unused_huge_shrink()
787 if (end <= folio->index || end >= next) { in shmem_unused_huge_shrink()
812 freed += next - end; in shmem_unused_huge_shrink()
815 list_del_init(&info->shrinklist); in shmem_unused_huge_shrink()
824 spin_lock(&sbinfo->shrinklist_lock); in shmem_unused_huge_shrink()
825 list_move(&info->shrinklist, &sbinfo->shrinklist); in shmem_unused_huge_shrink()
826 sbinfo->shrinklist_len++; in shmem_unused_huge_shrink()
827 spin_unlock(&sbinfo->shrinklist_lock); in shmem_unused_huge_shrink()
840 if (!READ_ONCE(sbinfo->shrinklist_len)) in shmem_unused_huge_scan()
850 return READ_ONCE(sbinfo->shrinklist_len); in shmem_unused_huge_count()
886 XA_STATE_ORDER(xas, &mapping->i_pages, index, folio_order(folio)); in shmem_add_to_page_cache()
894 folio->mapping = mapping; in shmem_add_to_page_cache()
895 folio->index = index; in shmem_add_to_page_cache()
903 xas_set_err(&xas, -EEXIST); in shmem_add_to_page_cache()
907 xas_set_err(&xas, -EEXIST); in shmem_add_to_page_cache()
914 mapping->nrpages += nr; in shmem_add_to_page_cache()
920 folio->mapping = NULL; in shmem_add_to_page_cache()
933 struct address_space *mapping = folio->mapping; in shmem_delete_from_page_cache()
937 xa_lock_irq(&mapping->i_pages); in shmem_delete_from_page_cache()
938 error = shmem_replace_entry(mapping, folio->index, folio, radswap); in shmem_delete_from_page_cache()
939 folio->mapping = NULL; in shmem_delete_from_page_cache()
940 mapping->nrpages -= nr; in shmem_delete_from_page_cache()
941 shmem_update_stats(folio, -nr); in shmem_delete_from_page_cache()
942 xa_unlock_irq(&mapping->i_pages); in shmem_delete_from_page_cache()
955 int order = xa_get_order(&mapping->i_pages, index); in shmem_free_swap()
958 old = xa_cmpxchg_irq(&mapping->i_pages, index, radswap, NULL, 0); in shmem_free_swap()
976 XA_STATE(xas, &mapping->i_pages, start); in shmem_partial_swap_usage()
979 unsigned long max = end - 1; in shmem_partial_swap_usage()
1008 struct inode *inode = file_inode(vma->vm_file); in shmem_swap_usage()
1010 struct address_space *mapping = inode->i_mapping; in shmem_swap_usage()
1013 /* Be careful as we don't hold info->lock */ in shmem_swap_usage()
1014 swapped = READ_ONCE(info->swapped); in shmem_swap_usage()
1024 if (!vma->vm_pgoff && vma->vm_end - vma->vm_start >= inode->i_size) in shmem_swap_usage()
1028 return shmem_partial_swap_usage(mapping, vma->vm_pgoff, in shmem_swap_usage()
1029 vma->vm_pgoff + vma_pages(vma)); in shmem_swap_usage()
1060 folio = filemap_get_entry(inode->i_mapping, index); in shmem_get_partial_folio()
1065 if (folio->mapping == inode->i_mapping) in shmem_get_partial_folio()
1087 struct address_space *mapping = inode->i_mapping; in shmem_undo_range()
1089 pgoff_t start = (lstart + PAGE_SIZE - 1) >> PAGE_SHIFT; in shmem_undo_range()
1099 if (lend == -1) in shmem_undo_range()
1100 end = -1; /* unsigned, so actually very big */ in shmem_undo_range()
1102 if (info->fallocend > start && info->fallocend <= end && !unfalloc) in shmem_undo_range()
1103 info->fallocend = start; in shmem_undo_range()
1107 while (index < end && find_lock_entries(mapping, &index, end - 1, in shmem_undo_range()
1146 end = folio->index; in shmem_undo_range()
1158 end = folio->index; in shmem_undo_range()
1169 if (!find_get_entries(mapping, &index, end - 1, &fbatch, in shmem_undo_range()
1171 /* If all gone or hole-punch or unfalloc, we're done */ in shmem_undo_range()
1172 if (index == start || end != -1) in shmem_undo_range()
1232 shmem_recalc_inode(inode, 0, -nr_swaps_freed); in shmem_undo_range()
1247 struct inode *inode = path->dentry->d_inode; in shmem_getattr()
1250 if (info->alloced - info->swapped != inode->i_mapping->nrpages) in shmem_getattr()
1253 if (info->fsflags & FS_APPEND_FL) in shmem_getattr()
1254 stat->attributes |= STATX_ATTR_APPEND; in shmem_getattr()
1255 if (info->fsflags & FS_IMMUTABLE_FL) in shmem_getattr()
1256 stat->attributes |= STATX_ATTR_IMMUTABLE; in shmem_getattr()
1257 if (info->fsflags & FS_NODUMP_FL) in shmem_getattr()
1258 stat->attributes |= STATX_ATTR_NODUMP; in shmem_getattr()
1259 stat->attributes_mask |= (STATX_ATTR_APPEND | in shmem_getattr()
1265 stat->blksize = HPAGE_PMD_SIZE; in shmem_getattr()
1268 stat->result_mask |= STATX_BTIME; in shmem_getattr()
1269 stat->btime.tv_sec = info->i_crtime.tv_sec; in shmem_getattr()
1270 stat->btime.tv_nsec = info->i_crtime.tv_nsec; in shmem_getattr()
1289 if ((info->seals & F_SEAL_EXEC) && (attr->ia_valid & ATTR_MODE)) { in shmem_setattr()
1290 if ((inode->i_mode ^ attr->ia_mode) & 0111) { in shmem_setattr()
1291 return -EPERM; in shmem_setattr()
1295 if (S_ISREG(inode->i_mode) && (attr->ia_valid & ATTR_SIZE)) { in shmem_setattr()
1296 loff_t oldsize = inode->i_size; in shmem_setattr()
1297 loff_t newsize = attr->ia_size; in shmem_setattr()
1300 if ((newsize < oldsize && (info->seals & F_SEAL_SHRINK)) || in shmem_setattr()
1301 (newsize > oldsize && (info->seals & F_SEAL_GROW))) in shmem_setattr()
1302 return -EPERM; in shmem_setattr()
1305 error = shmem_reacct_size(SHMEM_I(inode)->flags, in shmem_setattr()
1317 unmap_mapping_range(inode->i_mapping, in shmem_setattr()
1319 if (info->alloced) in shmem_setattr()
1321 newsize, (loff_t)-1); in shmem_setattr()
1324 unmap_mapping_range(inode->i_mapping, in shmem_setattr()
1344 if (attr->ia_valid & ATTR_MODE) in shmem_setattr()
1345 error = posix_acl_chmod(idmap, dentry, inode->i_mode); in shmem_setattr()
1358 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb); in shmem_evict_inode()
1361 if (shmem_mapping(inode->i_mapping)) { in shmem_evict_inode()
1362 shmem_unacct_size(info->flags, inode->i_size); in shmem_evict_inode()
1363 inode->i_size = 0; in shmem_evict_inode()
1364 mapping_set_exiting(inode->i_mapping); in shmem_evict_inode()
1365 shmem_truncate_range(inode, 0, (loff_t)-1); in shmem_evict_inode()
1366 if (!list_empty(&info->shrinklist)) { in shmem_evict_inode()
1367 spin_lock(&sbinfo->shrinklist_lock); in shmem_evict_inode()
1368 if (!list_empty(&info->shrinklist)) { in shmem_evict_inode()
1369 list_del_init(&info->shrinklist); in shmem_evict_inode()
1370 sbinfo->shrinklist_len--; in shmem_evict_inode()
1372 spin_unlock(&sbinfo->shrinklist_lock); in shmem_evict_inode()
1374 while (!list_empty(&info->swaplist)) { in shmem_evict_inode()
1376 wait_var_event(&info->stop_eviction, in shmem_evict_inode()
1377 !atomic_read(&info->stop_eviction)); in shmem_evict_inode()
1380 if (!atomic_read(&info->stop_eviction)) in shmem_evict_inode()
1381 list_del_init(&info->swaplist); in shmem_evict_inode()
1386 simple_xattrs_free(&info->xattrs, sbinfo->max_inodes ? &freed : NULL); in shmem_evict_inode()
1387 shmem_free_inode(inode->i_sb, freed); in shmem_evict_inode()
1388 WARN_ON(inode->i_blocks); in shmem_evict_inode()
1400 XA_STATE(xas, &mapping->i_pages, start); in shmem_find_swap_entries()
1435 * Move the swapped pages for an inode to page cache. Returns the count
1444 struct address_space *mapping = inode->i_mapping; in shmem_unuse_swap_entries()
1447 struct folio *folio = fbatch->folios[i]; in shmem_unuse_swap_entries()
1458 if (error == -ENOMEM) in shmem_unuse_swap_entries()
1470 struct address_space *mapping = inode->i_mapping; in shmem_unuse_inode()
1488 start = indices[folio_batch_count(&fbatch) - 1]; in shmem_unuse_inode()
1509 if (!info->swapped) { in shmem_unuse()
1510 list_del_init(&info->swaplist); in shmem_unuse()
1519 atomic_inc(&info->stop_eviction); in shmem_unuse()
1522 error = shmem_unuse_inode(&info->vfs_inode, type); in shmem_unuse()
1527 if (!info->swapped) in shmem_unuse()
1528 list_del_init(&info->swaplist); in shmem_unuse()
1529 if (atomic_dec_and_test(&info->stop_eviction)) in shmem_unuse()
1530 wake_up_var(&info->stop_eviction); in shmem_unuse()
1545 struct address_space *mapping = folio->mapping; in shmem_writepage()
1546 struct inode *inode = mapping->host; in shmem_writepage()
1548 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb); in shmem_writepage()
1555 * shmem_writepage; but a stacking filesystem might use ->writepage of in shmem_writepage()
1560 if (WARN_ON_ONCE(!wbc->for_reclaim)) in shmem_writepage()
1563 if ((info->flags & VM_LOCKED) || sbinfo->noswap) in shmem_writepage()
1580 if ((index > folio->index && index < folio_next_index(folio)) || in shmem_writepage()
1589 if (split_huge_page_to_list_to_order(page, wbc->list, 0)) in shmem_writepage()
1595 index = folio->index; in shmem_writepage()
1610 if (inode->i_private) { in shmem_writepage()
1612 spin_lock(&inode->i_lock); in shmem_writepage()
1613 shmem_falloc = inode->i_private; in shmem_writepage()
1615 !shmem_falloc->waitq && in shmem_writepage()
1616 index >= shmem_falloc->start && in shmem_writepage()
1617 index < shmem_falloc->next) in shmem_writepage()
1618 shmem_falloc->nr_unswapped += nr_pages; in shmem_writepage()
1621 spin_unlock(&inode->i_lock); in shmem_writepage()
1631 * Add inode to shmem_unuse()'s list of swapped-out inodes, in shmem_writepage()
1639 if (list_empty(&info->swaplist)) in shmem_writepage()
1640 list_add(&info->swaplist, &shmem_swaplist); in shmem_writepage()
1644 swap_shmem_alloc(folio->swap, nr_pages); in shmem_writepage()
1645 shmem_delete_from_page_cache(folio, swp_to_radix_entry(folio->swap)); in shmem_writepage()
1649 return swap_writepage(&folio->page, wbc); in shmem_writepage()
1652 list_del_init(&info->swaplist); in shmem_writepage()
1658 if (wbc->for_reclaim) in shmem_writepage()
1669 if (!mpol || mpol->mode == MPOL_DEFAULT) in shmem_show_mpol()
1680 if (sbinfo->mpol) { in shmem_get_sbmpol()
1681 raw_spin_lock(&sbinfo->stat_lock); /* prevent replace/use races */ in shmem_get_sbmpol()
1682 mpol = sbinfo->mpol; in shmem_get_sbmpol()
1684 raw_spin_unlock(&sbinfo->stat_lock); in shmem_get_sbmpol()
1763 unsigned long vm_flags = vma ? vma->vm_flags : 0; in shmem_allowable_huge_orders()
1783 * Only allow inherit orders if the top-level value is 'force', which in shmem_allowable_huge_orders()
1784 * means non-PMD sized THP can not override 'huge' mount option now. in shmem_allowable_huge_orders()
1805 struct vm_area_struct *vma = vmf ? vmf->vma : NULL; in shmem_suitable_orders()
1811 orders = thp_vma_suitable_orders(vma, vmf->address, orders); in shmem_suitable_orders()
1827 * Elsewhere -EEXIST would be the right code, but not here. in shmem_suitable_orders()
1829 if (!xa_find(&mapping->i_pages, &aligned_index, in shmem_suitable_orders()
1830 aligned_index + pages - 1, XA_PRESENT)) in shmem_suitable_orders()
1864 struct address_space *mapping = inode->i_mapping; in shmem_alloc_and_add_folio()
1896 return ERR_PTR(-ENOMEM); in shmem_alloc_and_add_folio()
1905 if (xa_find(&mapping->i_pages, &index, in shmem_alloc_and_add_folio()
1906 index + pages - 1, XA_PRESENT)) { in shmem_alloc_and_add_folio()
1907 error = -EEXIST; in shmem_alloc_and_add_folio()
1925 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb); in shmem_alloc_and_add_folio()
1936 spin_lock(&info->lock); in shmem_alloc_and_add_folio()
1937 freed = pages + info->alloced - info->swapped - in shmem_alloc_and_add_folio()
1938 READ_ONCE(mapping->nrpages); in shmem_alloc_and_add_folio()
1940 info->alloced -= freed; in shmem_alloc_and_add_folio()
1941 spin_unlock(&info->lock); in shmem_alloc_and_add_folio()
1983 return ERR_PTR(-ENOMEM); in shmem_swap_alloc_folio()
1986 if (mem_cgroup_swapin_charge_folio(new, vma ? vma->vm_mm : NULL, in shmem_swap_alloc_folio()
1989 return ERR_PTR(-ENOMEM); in shmem_swap_alloc_folio()
2000 * concurrent swapin and return -EEXIST. in shmem_swap_alloc_folio()
2004 return ERR_PTR(-EEXIST); in shmem_swap_alloc_folio()
2009 new->swap = entry; in shmem_swap_alloc_folio()
2042 swp_entry_t entry = old->swap; in shmem_replace_folio()
2045 XA_STATE(xas, &swap_mapping->i_pages, swap_index); in shmem_replace_folio()
2064 return -ENOMEM; in shmem_replace_folio()
2073 new->swap = entry; in shmem_replace_folio()
2076 /* Swap cache still stores N entries instead of a high-order entry */ in shmem_replace_folio()
2077 xa_lock_irq(&swap_mapping->i_pages); in shmem_replace_folio()
2082 error = -ENOENT; in shmem_replace_folio()
2092 shmem_update_stats(old, -nr_pages); in shmem_replace_folio()
2094 xa_unlock_irq(&swap_mapping->i_pages); in shmem_replace_folio()
2099 * check both the swapcache flag and folio->private in shmem_replace_folio()
2110 old->private = NULL; in shmem_replace_folio()
2126 struct address_space *mapping = inode->i_mapping; in shmem_set_folio_swapin_error()
2132 old = xa_cmpxchg_irq(&mapping->i_pages, index, in shmem_set_folio_swapin_error()
2143 * Don't treat swapin error folio as alloced. Otherwise inode->i_blocks in shmem_set_folio_swapin_error()
2147 shmem_recalc_inode(inode, -nr_pages, -nr_pages); in shmem_set_folio_swapin_error()
2154 struct address_space *mapping = inode->i_mapping; in shmem_split_large_entry()
2155 XA_STATE_ORDER(xas, &mapping->i_pages, index, 0); in shmem_split_large_entry()
2170 xas_set_err(&xas, -EEXIST); in shmem_split_large_entry()
2188 pgoff_t swap_offset = aligned_index - swap_index; in shmem_split_large_entry()
2196 * Re-set the swap entry after splitting, and the swap in shmem_split_large_entry()
2206 __xa_store(&mapping->i_pages, aligned_index + i, in shmem_split_large_entry()
2237 struct address_space *mapping = inode->i_mapping; in shmem_swapin_folio()
2238 struct mm_struct *fault_mm = vma ? vma->vm_mm : NULL; in shmem_swapin_folio()
2251 return -EIO; in shmem_swapin_folio()
2256 return -EEXIST; in shmem_swapin_folio()
2258 return -EINVAL; in shmem_swapin_folio()
2263 order = xa_get_order(&mapping->i_pages, index); in shmem_swapin_folio()
2275 * If uffd is active for the vma, we need per-page fault in shmem_swapin_folio()
2277 * to swapin order-0 folio, as well as for zswap case. in shmem_swapin_folio()
2284 if (!fallback_order0 && data_race(si->flags & SWP_SYNCHRONOUS_IO)) { in shmem_swapin_folio()
2292 * Fallback to swapin order-0 folio unless the swap entry in shmem_swapin_folio()
2297 if (error == -EEXIST) in shmem_swapin_folio()
2318 pgoff_t offset = index - round_down(index, 1 << split_order); in shmem_swapin_folio()
2326 error = -ENOMEM; in shmem_swapin_folio()
2348 pgoff_t offset = index - round_down(index, 1 << split_order); in shmem_swapin_folio()
2358 folio->swap.val != swap.val || in shmem_swapin_folio()
2360 xa_get_order(&mapping->i_pages, index) != folio_order(folio)) { in shmem_swapin_folio()
2361 error = -EEXIST; in shmem_swapin_folio()
2365 error = -EIO; in shmem_swapin_folio()
2389 shmem_recalc_inode(inode, 0, -nr_pages); in shmem_swapin_folio()
2395 folio->swap.val = 0; in shmem_swapin_folio()
2408 error = -EEXIST; in shmem_swapin_folio()
2409 if (error == -EIO) in shmem_swapin_folio()
2425 * shmem_get_folio_gfp - find page in cache, or get from swap, or allocate
2437 struct vm_area_struct *vma = vmf ? vmf->vma : NULL; in shmem_get_folio_gfp()
2444 if (WARN_ON_ONCE(!shmem_mapping(inode->i_mapping))) in shmem_get_folio_gfp()
2445 return -EINVAL; in shmem_get_folio_gfp()
2448 return -EFBIG; in shmem_get_folio_gfp()
2452 return -EINVAL; in shmem_get_folio_gfp()
2455 fault_mm = vma ? vma->vm_mm : NULL; in shmem_get_folio_gfp()
2457 folio = filemap_get_entry(inode->i_mapping, index); in shmem_get_folio_gfp()
2468 if (error == -EEXIST) in shmem_get_folio_gfp()
2479 if (unlikely(folio->mapping != inode->i_mapping)) { in shmem_get_folio_gfp()
2503 return -ENOENT; in shmem_get_folio_gfp()
2529 if (PTR_ERR(folio) == -EEXIST) in shmem_get_folio_gfp()
2536 if (error == -EEXIST) in shmem_get_folio_gfp()
2547 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb); in shmem_get_folio_gfp()
2553 spin_lock(&sbinfo->shrinklist_lock); in shmem_get_folio_gfp()
2556 * ->shrink_list in shmem_unused_huge_shrink() in shmem_get_folio_gfp()
2558 if (list_empty_careful(&info->shrinklist)) { in shmem_get_folio_gfp()
2559 list_add_tail(&info->shrinklist, in shmem_get_folio_gfp()
2560 &sbinfo->shrinklist); in shmem_get_folio_gfp()
2561 sbinfo->shrinklist_len++; in shmem_get_folio_gfp()
2563 spin_unlock(&sbinfo->shrinklist_lock); in shmem_get_folio_gfp()
2591 error = -EINVAL; in shmem_get_folio_gfp()
2613 * shmem_get_folio - find, and lock a shmem folio.
2628 * - for SGP_READ, *@foliop is %NULL and 0 is returned
2629 * - for SGP_NOALLOC, *@foliop is %NULL and -ENOENT is returned
2630 * - for all other flags a new folio is allocated, inserted into the
2640 mapping_gfp_mask(inode->i_mapping), NULL, NULL); in shmem_get_folio()
2646 * entry unconditionally - even if something else had already woken the
2653 list_del_init(&wait->entry); in synchronous_wake_function()
2659 * prevent the hole-punch from ever completing: which in turn
2667 * hole-punch begins, so that one fault then races with the punch:
2680 spin_lock(&inode->i_lock); in shmem_falloc_wait()
2681 shmem_falloc = inode->i_private; in shmem_falloc_wait()
2683 shmem_falloc->waitq && in shmem_falloc_wait()
2684 vmf->pgoff >= shmem_falloc->start && in shmem_falloc_wait()
2685 vmf->pgoff < shmem_falloc->next) { in shmem_falloc_wait()
2691 shmem_falloc_waitq = shmem_falloc->waitq; in shmem_falloc_wait()
2694 spin_unlock(&inode->i_lock); in shmem_falloc_wait()
2699 * stack of the hole-punching task: shmem_falloc_waitq in shmem_falloc_wait()
2704 spin_lock(&inode->i_lock); in shmem_falloc_wait()
2707 spin_unlock(&inode->i_lock); in shmem_falloc_wait()
2717 struct inode *inode = file_inode(vmf->vma->vm_file); in shmem_fault()
2718 gfp_t gfp = mapping_gfp_mask(inode->i_mapping); in shmem_fault()
2725 * prevent the hole-punch from ever completing: noted in i_private. in shmem_fault()
2727 if (unlikely(inode->i_private)) { in shmem_fault()
2733 WARN_ON_ONCE(vmf->page != NULL); in shmem_fault()
2734 err = shmem_get_folio_gfp(inode, vmf->pgoff, 0, &folio, SGP_CACHE, in shmem_fault()
2739 vmf->page = folio_file_page(folio, vmf->pgoff); in shmem_fault()
2757 return -ENOMEM; in shmem_get_unmapped_area()
2759 addr = mm_get_unmapped_area(current->mm, file, uaddr, len, pgoff, in shmem_get_unmapped_area()
2768 if (addr > TASK_SIZE - len) in shmem_get_unmapped_area()
2791 VM_BUG_ON(file->f_op != &shmem_file_operations); in shmem_get_unmapped_area()
2792 sb = file_inode(file)->i_sb; in shmem_get_unmapped_area()
2800 sb = shm_mnt->mnt_sb; in shmem_get_unmapped_area()
2810 if (SHMEM_SB(sb)->huge != SHMEM_HUGE_NEVER) in shmem_get_unmapped_area()
2819 if (SHMEM_SB(sb)->huge == SHMEM_HUGE_NEVER && !order) in shmem_get_unmapped_area()
2826 offset = (pgoff << PAGE_SHIFT) & (hpage_size - 1); in shmem_get_unmapped_area()
2829 if ((addr & (hpage_size - 1)) == offset) in shmem_get_unmapped_area()
2832 inflated_len = len + hpage_size - PAGE_SIZE; in shmem_get_unmapped_area()
2838 inflated_addr = mm_get_unmapped_area(current->mm, NULL, uaddr, in shmem_get_unmapped_area()
2845 inflated_offset = inflated_addr & (hpage_size - 1); in shmem_get_unmapped_area()
2846 inflated_addr += offset - inflated_offset; in shmem_get_unmapped_area()
2850 if (inflated_addr > TASK_SIZE - len) in shmem_get_unmapped_area()
2858 struct inode *inode = file_inode(vma->vm_file); in shmem_set_policy()
2859 return mpol_set_shared_policy(&SHMEM_I(inode)->policy, vma, mpol); in shmem_set_policy()
2865 struct inode *inode = file_inode(vma->vm_file); in shmem_get_policy()
2874 *ilx = inode->i_ino; in shmem_get_policy()
2875 index = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; in shmem_get_policy()
2876 return mpol_shared_policy_lookup(&SHMEM_I(inode)->policy, index); in shmem_get_policy()
2885 *ilx = info->vfs_inode.i_ino + (index >> order); in shmem_get_pgoff_policy()
2887 mpol = mpol_shared_policy_lookup(&info->policy, index); in shmem_get_pgoff_policy()
2903 int retval = -ENOMEM; in shmem_lock()
2906 * What serializes the accesses to info->flags? in shmem_lock()
2910 if (lock && !(info->flags & VM_LOCKED)) { in shmem_lock()
2911 if (!user_shm_lock(inode->i_size, ucounts)) in shmem_lock()
2913 info->flags |= VM_LOCKED; in shmem_lock()
2914 mapping_set_unevictable(file->f_mapping); in shmem_lock()
2916 if (!lock && (info->flags & VM_LOCKED) && ucounts) { in shmem_lock()
2917 user_shm_unlock(inode->i_size, ucounts); in shmem_lock()
2918 info->flags &= ~VM_LOCKED; in shmem_lock()
2919 mapping_clear_unevictable(file->f_mapping); in shmem_lock()
2933 if (inode->i_nlink) in shmem_mmap()
2934 vma->vm_ops = &shmem_vm_ops; in shmem_mmap()
2936 vma->vm_ops = &shmem_anon_vm_ops; in shmem_mmap()
2942 file->f_mode |= FMODE_CAN_ODIRECT; in shmem_file_open()
2951 * shmem_inode_casefold_flags - Deal with casefold file attribute flag
2954 * an empty dir, and can't be removed from a non-empty dir.
2959 unsigned int old = inode->i_flags; in shmem_inode_casefold_flags()
2960 struct super_block *sb = inode->i_sb; in shmem_inode_casefold_flags()
2964 if (!sb->s_encoding) in shmem_inode_casefold_flags()
2965 return -EOPNOTSUPP; in shmem_inode_casefold_flags()
2967 if (!S_ISDIR(inode->i_mode)) in shmem_inode_casefold_flags()
2968 return -ENOTDIR; in shmem_inode_casefold_flags()
2971 return -ENOTEMPTY; in shmem_inode_casefold_flags()
2977 return -ENOTEMPTY; in shmem_inode_casefold_flags()
2987 return -EOPNOTSUPP; in shmem_inode_casefold_flags()
3028 return &SHMEM_I(inode)->dir_offsets; in shmem_get_offset_ctx()
3049 return ERR_PTR(-ENOSPC); in __shmem_get_inode()
3052 inode->i_ino = ino; in __shmem_get_inode()
3054 inode->i_blocks = 0; in __shmem_get_inode()
3056 inode->i_generation = get_random_u32(); in __shmem_get_inode()
3058 memset(info, 0, (char *)inode - (char *)info); in __shmem_get_inode()
3059 spin_lock_init(&info->lock); in __shmem_get_inode()
3060 atomic_set(&info->stop_eviction, 0); in __shmem_get_inode()
3061 info->seals = F_SEAL_SEAL; in __shmem_get_inode()
3062 info->flags = flags & VM_NORESERVE; in __shmem_get_inode()
3063 info->i_crtime = inode_get_mtime(inode); in __shmem_get_inode()
3064 info->fsflags = (dir == NULL) ? 0 : in __shmem_get_inode()
3065 SHMEM_I(dir)->fsflags & SHMEM_FL_INHERITED; in __shmem_get_inode()
3066 if (info->fsflags) in __shmem_get_inode()
3067 shmem_set_inode_flags(inode, info->fsflags, NULL); in __shmem_get_inode()
3068 INIT_LIST_HEAD(&info->shrinklist); in __shmem_get_inode()
3069 INIT_LIST_HEAD(&info->swaplist); in __shmem_get_inode()
3070 simple_xattrs_init(&info->xattrs); in __shmem_get_inode()
3072 if (sbinfo->noswap) in __shmem_get_inode()
3073 mapping_set_unevictable(inode->i_mapping); in __shmem_get_inode()
3076 if (sbinfo->huge) in __shmem_get_inode()
3077 mapping_set_large_folios(inode->i_mapping); in __shmem_get_inode()
3081 inode->i_op = &shmem_special_inode_operations; in __shmem_get_inode()
3085 inode->i_mapping->a_ops = &shmem_aops; in __shmem_get_inode()
3086 inode->i_op = &shmem_inode_operations; in __shmem_get_inode()
3087 inode->i_fop = &shmem_file_operations; in __shmem_get_inode()
3088 mpol_shared_policy_init(&info->policy, in __shmem_get_inode()
3094 inode->i_size = 2 * BOGO_DIRENT_SIZE; in __shmem_get_inode()
3095 inode->i_op = &shmem_dir_inode_operations; in __shmem_get_inode()
3096 inode->i_fop = &simple_offset_dir_operations; in __shmem_get_inode()
3104 mpol_shared_policy_init(&info->policy, NULL); in __shmem_get_inode()
3136 inode->i_flags |= S_NOQUOTA; in shmem_get_inode()
3157 struct inode *inode = file_inode(dst_vma->vm_file); in shmem_mfill_atomic_pte()
3159 struct address_space *mapping = inode->i_mapping; in shmem_mfill_atomic_pte()
3169 * We may have got a page, returned -ENOENT triggering a retry, in shmem_mfill_atomic_pte()
3170 * and now we find ourselves with -ENOMEM. Release the page, to in shmem_mfill_atomic_pte()
3177 return -ENOMEM; in shmem_mfill_atomic_pte()
3181 ret = -ENOMEM; in shmem_mfill_atomic_pte()
3213 ret = -ENOENT; in shmem_mfill_atomic_pte()
3220 clear_user_highpage(&folio->page, dst_addr); in shmem_mfill_atomic_pte()
3234 ret = -EFAULT; in shmem_mfill_atomic_pte()
3239 ret = mem_cgroup_charge(folio, dst_vma->vm_mm, gfp); in shmem_mfill_atomic_pte()
3247 &folio->page, true, flags); in shmem_mfill_atomic_pte()
3274 struct inode *inode = mapping->host; in shmem_write_begin()
3281 if (unlikely(info->seals & (F_SEAL_GROW | in shmem_write_begin()
3283 if (info->seals & (F_SEAL_WRITE | F_SEAL_FUTURE_WRITE)) in shmem_write_begin()
3284 return -EPERM; in shmem_write_begin()
3285 if ((info->seals & F_SEAL_GROW) && pos + len > inode->i_size) in shmem_write_begin()
3286 return -EPERM; in shmem_write_begin()
3296 return -EIO; in shmem_write_begin()
3308 struct inode *inode = mapping->host; in shmem_write_end()
3310 if (pos + copied > inode->i_size) in shmem_write_end()
3330 struct file *file = iocb->ki_filp; in shmem_file_read_iter()
3332 struct address_space *mapping = inode->i_mapping; in shmem_file_read_iter()
3346 if (unlikely(iocb->ki_pos >= i_size)) in shmem_file_read_iter()
3349 index = iocb->ki_pos >> PAGE_SHIFT; in shmem_file_read_iter()
3352 if (error == -EINVAL) in shmem_file_read_iter()
3362 error = -EIO; in shmem_file_read_iter()
3376 if (unlikely(iocb->ki_pos >= i_size)) { in shmem_file_read_iter()
3381 end_offset = min_t(loff_t, i_size, iocb->ki_pos + to->count); in shmem_file_read_iter()
3386 offset = iocb->ki_pos & (fsize - 1); in shmem_file_read_iter()
3387 nr = min_t(loff_t, end_offset - iocb->ki_pos, fsize - offset); in shmem_file_read_iter()
3408 * Ok, we have the page, and it's up-to-date, so in shmem_file_read_iter()
3426 * splice() - or others? - can result in confusion: in shmem_file_read_iter()
3433 iocb->ki_pos += ret; in shmem_file_read_iter()
3438 error = -EFAULT; in shmem_file_read_iter()
3450 struct file *file = iocb->ki_filp; in shmem_file_write_iter()
3451 struct inode *inode = file->f_mapping->host; in shmem_file_write_iter()
3498 size = min_t(size_t, size, PAGE_SIZE - offset); in splice_zeropage_into_pipe()
3509 pipe->head++; in splice_zeropage_into_pipe()
3520 struct address_space *mapping = inode->i_mapping; in shmem_file_splice_read()
3528 npages = max_t(ssize_t, pipe->max_usage - used, 0); in shmem_file_splice_read()
3543 if (error == -EINVAL) in shmem_file_splice_read()
3552 error = -EIO; in shmem_file_splice_read()
3565 * the correct value for "nr", which means the zero-filled in shmem_file_splice_read()
3567 * another truncate extends the file - this is desired though). in shmem_file_splice_read()
3580 size = umin(size, PAGE_SIZE - offset); in shmem_file_splice_read()
3582 part = min_t(loff_t, isize - *ppos, size); in shmem_file_splice_read()
3598 * Ok, we have the page, and it's up-to-date, so we can in shmem_file_splice_read()
3610 len -= n; in shmem_file_splice_read()
3613 in->f_ra.prev_pos = *ppos; in shmem_file_splice_read()
3629 struct address_space *mapping = file->f_mapping; in shmem_file_llseek()
3630 struct inode *inode = mapping->host; in shmem_file_llseek()
3636 return -ENXIO; in shmem_file_llseek()
3640 offset = mapping_seek_hole_data(mapping, offset, inode->i_size, whence); in shmem_file_llseek()
3651 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb); in shmem_fallocate()
3658 return -EOPNOTSUPP; in shmem_fallocate()
3663 struct address_space *mapping = file->f_mapping; in shmem_fallocate()
3665 loff_t unmap_end = round_down(offset + len, PAGE_SIZE) - 1; in shmem_fallocate()
3669 if (info->seals & (F_SEAL_WRITE | F_SEAL_FUTURE_WRITE)) { in shmem_fallocate()
3670 error = -EPERM; in shmem_fallocate()
3677 spin_lock(&inode->i_lock); in shmem_fallocate()
3678 inode->i_private = &shmem_falloc; in shmem_fallocate()
3679 spin_unlock(&inode->i_lock); in shmem_fallocate()
3683 1 + unmap_end - unmap_start, 0); in shmem_fallocate()
3684 shmem_truncate_range(inode, offset, offset + len - 1); in shmem_fallocate()
3685 /* No need to unmap again: hole-punching leaves COWed pages */ in shmem_fallocate()
3687 spin_lock(&inode->i_lock); in shmem_fallocate()
3688 inode->i_private = NULL; in shmem_fallocate()
3691 spin_unlock(&inode->i_lock); in shmem_fallocate()
3701 if ((info->seals & F_SEAL_GROW) && offset + len > inode->i_size) { in shmem_fallocate()
3702 error = -EPERM; in shmem_fallocate()
3707 end = (offset + len + PAGE_SIZE - 1) >> PAGE_SHIFT; in shmem_fallocate()
3709 if (sbinfo->max_blocks && end - start > sbinfo->max_blocks) { in shmem_fallocate()
3710 error = -ENOSPC; in shmem_fallocate()
3719 spin_lock(&inode->i_lock); in shmem_fallocate()
3720 inode->i_private = &shmem_falloc; in shmem_fallocate()
3721 spin_unlock(&inode->i_lock); in shmem_fallocate()
3724 * info->fallocend is only relevant when huge pages might be in shmem_fallocate()
3728 undo_fallocend = info->fallocend; in shmem_fallocate()
3729 if (info->fallocend < end) in shmem_fallocate()
3730 info->fallocend = end; in shmem_fallocate()
3737 * situations. We don't want to abort in case of non-fatal in shmem_fallocate()
3743 error = -EINTR; in shmem_fallocate()
3745 error = -ENOMEM; in shmem_fallocate()
3750 info->fallocend = undo_fallocend; in shmem_fallocate()
3755 ((loff_t)index << PAGE_SHIFT) - 1, true); in shmem_fallocate()
3763 * making it uptodate and un-undoable if we fail later. in shmem_fallocate()
3766 /* Beware 32-bit wraparound */ in shmem_fallocate()
3768 index--; in shmem_fallocate()
3775 shmem_falloc.nr_falloced += index - shmem_falloc.next; in shmem_fallocate()
3791 if (!(mode & FALLOC_FL_KEEP_SIZE) && offset + len > inode->i_size) in shmem_fallocate()
3794 spin_lock(&inode->i_lock); in shmem_fallocate()
3795 inode->i_private = NULL; in shmem_fallocate()
3796 spin_unlock(&inode->i_lock); in shmem_fallocate()
3806 struct shmem_sb_info *sbinfo = SHMEM_SB(dentry->d_sb); in shmem_statfs()
3808 buf->f_type = TMPFS_MAGIC; in shmem_statfs()
3809 buf->f_bsize = PAGE_SIZE; in shmem_statfs()
3810 buf->f_namelen = NAME_MAX; in shmem_statfs()
3811 if (sbinfo->max_blocks) { in shmem_statfs()
3812 buf->f_blocks = sbinfo->max_blocks; in shmem_statfs()
3813 buf->f_bavail = in shmem_statfs()
3814 buf->f_bfree = sbinfo->max_blocks - in shmem_statfs()
3815 percpu_counter_sum(&sbinfo->used_blocks); in shmem_statfs()
3817 if (sbinfo->max_inodes) { in shmem_statfs()
3818 buf->f_files = sbinfo->max_inodes; in shmem_statfs()
3819 buf->f_ffree = sbinfo->free_ispace / BOGO_INODE_SIZE; in shmem_statfs()
3823 buf->f_fsid = uuid_to_fsid(dentry->d_sb->s_uuid.b); in shmem_statfs()
3838 if (!generic_ci_validate_strict_name(dir, &dentry->d_name)) in shmem_mknod()
3839 return -EINVAL; in shmem_mknod()
3841 inode = shmem_get_inode(idmap, dir->i_sb, dir, mode, dev, VM_NORESERVE); in shmem_mknod()
3848 error = security_inode_init_security(inode, dir, &dentry->d_name, in shmem_mknod()
3850 if (error && error != -EOPNOTSUPP) in shmem_mknod()
3857 dir->i_size += BOGO_DIRENT_SIZE; in shmem_mknod()
3866 dget(dentry); /* Extra count - pin the dentry in core */ in shmem_mknod()
3881 inode = shmem_get_inode(idmap, dir->i_sb, dir, mode, 0, VM_NORESERVE); in shmem_tmpfile()
3888 if (error && error != -EOPNOTSUPP) in shmem_tmpfile()
3936 if (inode->i_nlink) { in shmem_link()
3937 ret = shmem_reserve_inode(inode->i_sb, NULL); in shmem_link()
3944 if (inode->i_nlink) in shmem_link()
3945 shmem_free_inode(inode->i_sb, 0); in shmem_link()
3949 dir->i_size += BOGO_DIRENT_SIZE; in shmem_link()
3955 dget(dentry); /* Extra pinning count for the created dentry */ in shmem_link()
3968 if (inode->i_nlink > 1 && !S_ISDIR(inode->i_mode)) in shmem_unlink()
3969 shmem_free_inode(inode->i_sb, 0); in shmem_unlink()
3973 dir->i_size -= BOGO_DIRENT_SIZE; in shmem_unlink()
3978 dput(dentry); /* Undo the count from "create" - does all the work */ in shmem_unlink()
3981 * For now, VFS can't deal with case-insensitive negative dentries, so in shmem_unlink()
3993 return -ENOTEMPTY; in shmem_rmdir()
4006 whiteout = d_alloc(old_dentry->d_parent, &old_dentry->d_name); in shmem_whiteout()
4008 return -ENOMEM; in shmem_whiteout()
4029 * we just have to decrement the usage count for the target if
4039 int they_are_dirs = S_ISDIR(inode->i_mode); in shmem_rename2()
4043 return -EINVAL; in shmem_rename2()
4050 return -ENOTEMPTY; in shmem_rename2()
4073 old_dir->i_size -= BOGO_DIRENT_SIZE; in shmem_rename2()
4074 new_dir->i_size += BOGO_DIRENT_SIZE; in shmem_rename2()
4092 return -ENAMETOOLONG; in shmem_symlink()
4094 inode = shmem_get_inode(idmap, dir->i_sb, dir, S_IFLNK | 0777, 0, in shmem_symlink()
4099 error = security_inode_init_security(inode, dir, &dentry->d_name, in shmem_symlink()
4101 if (error && error != -EOPNOTSUPP) in shmem_symlink()
4108 inode->i_size = len-1; in shmem_symlink()
4112 error = -ENOMEM; in shmem_symlink()
4115 inode->i_op = &shmem_short_symlink_operations; in shmem_symlink()
4116 inode_set_cached_link(inode, link, len - 1); in shmem_symlink()
4119 inode->i_mapping->a_ops = &shmem_aops; in shmem_symlink()
4123 inode->i_op = &shmem_symlink_inode_operations; in shmem_symlink()
4130 dir->i_size += BOGO_DIRENT_SIZE; in shmem_symlink()
4160 folio = filemap_get_folio(inode->i_mapping, 0); in shmem_get_link()
4162 return ERR_PTR(-ECHILD); in shmem_get_link()
4166 return ERR_PTR(-ECHILD); in shmem_get_link()
4173 return ERR_PTR(-ECHILD); in shmem_get_link()
4177 return ERR_PTR(-ECHILD); in shmem_get_link()
4191 fileattr_fill_flags(fa, info->fsflags & SHMEM_FL_USER_VISIBLE); in shmem_fileattr_get()
4204 return -EOPNOTSUPP; in shmem_fileattr_set()
4205 if (fa->flags & ~SHMEM_FL_USER_MODIFIABLE) in shmem_fileattr_set()
4206 return -EOPNOTSUPP; in shmem_fileattr_set()
4208 flags = (info->fsflags & ~SHMEM_FL_USER_MODIFIABLE) | in shmem_fileattr_set()
4209 (fa->flags & SHMEM_FL_USER_MODIFIABLE); in shmem_fileattr_set()
4216 info->fsflags = flags; in shmem_fileattr_set()
4237 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb); in shmem_initxattrs()
4243 if (sbinfo->max_inodes) { in shmem_initxattrs()
4244 for (xattr = xattr_array; xattr->name != NULL; xattr++) { in shmem_initxattrs()
4245 ispace += simple_xattr_space(xattr->name, in shmem_initxattrs()
4246 xattr->value_len + XATTR_SECURITY_PREFIX_LEN); in shmem_initxattrs()
4249 raw_spin_lock(&sbinfo->stat_lock); in shmem_initxattrs()
4250 if (sbinfo->free_ispace < ispace) in shmem_initxattrs()
4253 sbinfo->free_ispace -= ispace; in shmem_initxattrs()
4254 raw_spin_unlock(&sbinfo->stat_lock); in shmem_initxattrs()
4256 return -ENOSPC; in shmem_initxattrs()
4260 for (xattr = xattr_array; xattr->name != NULL; xattr++) { in shmem_initxattrs()
4261 new_xattr = simple_xattr_alloc(xattr->value, xattr->value_len); in shmem_initxattrs()
4265 len = strlen(xattr->name) + 1; in shmem_initxattrs()
4266 new_xattr->name = kmalloc(XATTR_SECURITY_PREFIX_LEN + len, in shmem_initxattrs()
4268 if (!new_xattr->name) { in shmem_initxattrs()
4273 memcpy(new_xattr->name, XATTR_SECURITY_PREFIX, in shmem_initxattrs()
4275 memcpy(new_xattr->name + XATTR_SECURITY_PREFIX_LEN, in shmem_initxattrs()
4276 xattr->name, len); in shmem_initxattrs()
4278 simple_xattr_add(&info->xattrs, new_xattr); in shmem_initxattrs()
4281 if (xattr->name != NULL) { in shmem_initxattrs()
4283 raw_spin_lock(&sbinfo->stat_lock); in shmem_initxattrs()
4284 sbinfo->free_ispace += ispace; in shmem_initxattrs()
4285 raw_spin_unlock(&sbinfo->stat_lock); in shmem_initxattrs()
4287 simple_xattrs_free(&info->xattrs, NULL); in shmem_initxattrs()
4288 return -ENOMEM; in shmem_initxattrs()
4301 return simple_xattr_get(&info->xattrs, name, buffer, size); in shmem_xattr_handler_get()
4311 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb); in shmem_xattr_handler_set()
4316 if (value && sbinfo->max_inodes) { in shmem_xattr_handler_set()
4318 raw_spin_lock(&sbinfo->stat_lock); in shmem_xattr_handler_set()
4319 if (sbinfo->free_ispace < ispace) in shmem_xattr_handler_set()
4322 sbinfo->free_ispace -= ispace; in shmem_xattr_handler_set()
4323 raw_spin_unlock(&sbinfo->stat_lock); in shmem_xattr_handler_set()
4325 return -ENOSPC; in shmem_xattr_handler_set()
4328 old_xattr = simple_xattr_set(&info->xattrs, name, value, size, flags); in shmem_xattr_handler_set()
4331 if (old_xattr && sbinfo->max_inodes) in shmem_xattr_handler_set()
4332 ispace = simple_xattr_space(old_xattr->name, in shmem_xattr_handler_set()
4333 old_xattr->size); in shmem_xattr_handler_set()
4340 raw_spin_lock(&sbinfo->stat_lock); in shmem_xattr_handler_set()
4341 sbinfo->free_ispace += ispace; in shmem_xattr_handler_set()
4342 raw_spin_unlock(&sbinfo->stat_lock); in shmem_xattr_handler_set()
4375 return simple_xattr_list(d_inode(dentry), &info->xattrs, buffer, size); in shmem_listxattr()
4399 return ERR_PTR(-ESTALE); in shmem_get_parent()
4407 return ino->i_ino == inum && fh[0] == ino->i_generation; in shmem_match()
4428 inum = fid->raw[2]; in shmem_fh_to_dentry()
4429 inum = (inum << 32) | fid->raw[1]; in shmem_fh_to_dentry()
4431 inode = ilookup5(sb, (unsigned long)(inum + fid->raw[0]), in shmem_fh_to_dentry()
4432 shmem_match, fid->raw); in shmem_fh_to_dentry()
4459 inode->i_ino + inode->i_generation); in shmem_encode_fh()
4463 fh[0] = inode->i_generation; in shmem_encode_fh()
4464 fh[1] = inode->i_ino; in shmem_encode_fh()
4465 fh[2] = ((__u64)inode->i_ino) >> 32; in shmem_encode_fh()
4540 struct shmem_options *ctx = fc->fs_private; in shmem_parse_opt_casefold()
4543 char *version_str = param->string + 5; in shmem_parse_opt_casefold()
4546 if (strncmp(param->string, "utf8-", 5)) in shmem_parse_opt_casefold()
4547 return invalfc(fc, "Only UTF-8 encodings are supported " in shmem_parse_opt_casefold()
4548 "in the format: utf8-<version number>"); in shmem_parse_opt_casefold()
4552 return invalfc(fc, "Invalid UTF-8 version: %s", version_str); in shmem_parse_opt_casefold()
4558 return invalfc(fc, "Failed loading UTF-8 version: utf8-%u.%u.%u\n", in shmem_parse_opt_casefold()
4563 pr_info("tmpfs: Using encoding : utf8-%u.%u.%u\n", in shmem_parse_opt_casefold()
4566 ctx->encoding = encoding; in shmem_parse_opt_casefold()
4580 struct shmem_options *ctx = fc->fs_private; in shmem_parse_one()
4594 size = memparse(param->string, &rest); in shmem_parse_one()
4603 ctx->blocks = DIV_ROUND_UP(size, PAGE_SIZE); in shmem_parse_one()
4604 ctx->seen |= SHMEM_SEEN_BLOCKS; in shmem_parse_one()
4607 ctx->blocks = memparse(param->string, &rest); in shmem_parse_one()
4608 if (*rest || ctx->blocks > LONG_MAX) in shmem_parse_one()
4610 ctx->seen |= SHMEM_SEEN_BLOCKS; in shmem_parse_one()
4613 ctx->inodes = memparse(param->string, &rest); in shmem_parse_one()
4614 if (*rest || ctx->inodes > ULONG_MAX / BOGO_INODE_SIZE) in shmem_parse_one()
4616 ctx->seen |= SHMEM_SEEN_INODES; in shmem_parse_one()
4619 ctx->mode = result.uint_32 & 07777; in shmem_parse_one()
4628 if (!kuid_has_mapping(fc->user_ns, kuid)) in shmem_parse_one()
4631 ctx->uid = kuid; in shmem_parse_one()
4640 if (!kgid_has_mapping(fc->user_ns, kgid)) in shmem_parse_one()
4643 ctx->gid = kgid; in shmem_parse_one()
4646 ctx->huge = result.uint_32; in shmem_parse_one()
4647 if (ctx->huge != SHMEM_HUGE_NEVER && in shmem_parse_one()
4651 ctx->seen |= SHMEM_SEEN_HUGE; in shmem_parse_one()
4655 mpol_put(ctx->mpol); in shmem_parse_one()
4656 ctx->mpol = NULL; in shmem_parse_one()
4657 if (mpol_parse_str(param->string, &ctx->mpol)) in shmem_parse_one()
4663 ctx->full_inums = false; in shmem_parse_one()
4664 ctx->seen |= SHMEM_SEEN_INUMS; in shmem_parse_one()
4671 ctx->full_inums = true; in shmem_parse_one()
4672 ctx->seen |= SHMEM_SEEN_INUMS; in shmem_parse_one()
4675 if ((fc->user_ns != &init_user_ns) || !capable(CAP_SYS_ADMIN)) { in shmem_parse_one()
4679 ctx->noswap = true; in shmem_parse_one()
4680 ctx->seen |= SHMEM_SEEN_NOSWAP; in shmem_parse_one()
4683 if (fc->user_ns != &init_user_ns) in shmem_parse_one()
4685 ctx->seen |= SHMEM_SEEN_QUOTA; in shmem_parse_one()
4686 ctx->quota_types |= (QTYPE_MASK_USR | QTYPE_MASK_GRP); in shmem_parse_one()
4689 if (fc->user_ns != &init_user_ns) in shmem_parse_one()
4691 ctx->seen |= SHMEM_SEEN_QUOTA; in shmem_parse_one()
4692 ctx->quota_types |= QTYPE_MASK_USR; in shmem_parse_one()
4695 if (fc->user_ns != &init_user_ns) in shmem_parse_one()
4697 ctx->seen |= SHMEM_SEEN_QUOTA; in shmem_parse_one()
4698 ctx->quota_types |= QTYPE_MASK_GRP; in shmem_parse_one()
4701 size = memparse(param->string, &rest); in shmem_parse_one()
4707 ctx->qlimits.usrquota_bhardlimit = size; in shmem_parse_one()
4710 size = memparse(param->string, &rest); in shmem_parse_one()
4716 ctx->qlimits.grpquota_bhardlimit = size; in shmem_parse_one()
4719 size = memparse(param->string, &rest); in shmem_parse_one()
4725 ctx->qlimits.usrquota_ihardlimit = size; in shmem_parse_one()
4728 size = memparse(param->string, &rest); in shmem_parse_one()
4734 ctx->qlimits.grpquota_ihardlimit = size; in shmem_parse_one()
4742 ctx->strict_encoding = true; in shmem_parse_one()
4751 return invalfc(fc, "Unsupported parameter '%s'", param->key); in shmem_parse_one()
4753 return invalfc(fc, "Bad value for '%s'", param->key); in shmem_parse_one()
4765 * NUL-terminate this option: unfortunately, in shmem_next_opt()
4766 * mount options form a comma-separated list, in shmem_next_opt()
4794 struct shmem_options *ctx = fc->fs_private; in shmem_reconfigure()
4795 struct shmem_sb_info *sbinfo = SHMEM_SB(fc->root->d_sb); in shmem_reconfigure()
4800 raw_spin_lock(&sbinfo->stat_lock); in shmem_reconfigure()
4801 used_isp = sbinfo->max_inodes * BOGO_INODE_SIZE - sbinfo->free_ispace; in shmem_reconfigure()
4803 if ((ctx->seen & SHMEM_SEEN_BLOCKS) && ctx->blocks) { in shmem_reconfigure()
4804 if (!sbinfo->max_blocks) { in shmem_reconfigure()
4808 if (percpu_counter_compare(&sbinfo->used_blocks, in shmem_reconfigure()
4809 ctx->blocks) > 0) { in shmem_reconfigure()
4814 if ((ctx->seen & SHMEM_SEEN_INODES) && ctx->inodes) { in shmem_reconfigure()
4815 if (!sbinfo->max_inodes) { in shmem_reconfigure()
4819 if (ctx->inodes * BOGO_INODE_SIZE < used_isp) { in shmem_reconfigure()
4825 if ((ctx->seen & SHMEM_SEEN_INUMS) && !ctx->full_inums && in shmem_reconfigure()
4826 sbinfo->next_ino > UINT_MAX) { in shmem_reconfigure()
4827 err = "Current inum too high to switch to 32-bit inums"; in shmem_reconfigure()
4830 if ((ctx->seen & SHMEM_SEEN_NOSWAP) && ctx->noswap && !sbinfo->noswap) { in shmem_reconfigure()
4834 if (!(ctx->seen & SHMEM_SEEN_NOSWAP) && !ctx->noswap && sbinfo->noswap) { in shmem_reconfigure()
4839 if (ctx->seen & SHMEM_SEEN_QUOTA && in shmem_reconfigure()
4840 !sb_any_quota_loaded(fc->root->d_sb)) { in shmem_reconfigure()
4847 (ctx->qlimits.name## hardlimit && \ in shmem_reconfigure()
4848 (ctx->qlimits.name## hardlimit != sbinfo->qlimits.name## hardlimit)) in shmem_reconfigure()
4857 if (ctx->seen & SHMEM_SEEN_HUGE) in shmem_reconfigure()
4858 sbinfo->huge = ctx->huge; in shmem_reconfigure()
4859 if (ctx->seen & SHMEM_SEEN_INUMS) in shmem_reconfigure()
4860 sbinfo->full_inums = ctx->full_inums; in shmem_reconfigure()
4861 if (ctx->seen & SHMEM_SEEN_BLOCKS) in shmem_reconfigure()
4862 sbinfo->max_blocks = ctx->blocks; in shmem_reconfigure()
4863 if (ctx->seen & SHMEM_SEEN_INODES) { in shmem_reconfigure()
4864 sbinfo->max_inodes = ctx->inodes; in shmem_reconfigure()
4865 sbinfo->free_ispace = ctx->inodes * BOGO_INODE_SIZE - used_isp; in shmem_reconfigure()
4871 if (ctx->mpol) { in shmem_reconfigure()
4872 mpol = sbinfo->mpol; in shmem_reconfigure()
4873 sbinfo->mpol = ctx->mpol; /* transfers initial ref */ in shmem_reconfigure()
4874 ctx->mpol = NULL; in shmem_reconfigure()
4877 if (ctx->noswap) in shmem_reconfigure()
4878 sbinfo->noswap = true; in shmem_reconfigure()
4880 raw_spin_unlock(&sbinfo->stat_lock); in shmem_reconfigure()
4884 raw_spin_unlock(&sbinfo->stat_lock); in shmem_reconfigure()
4890 struct shmem_sb_info *sbinfo = SHMEM_SB(root->d_sb); in shmem_show_options()
4893 if (sbinfo->max_blocks != shmem_default_max_blocks()) in shmem_show_options()
4894 seq_printf(seq, ",size=%luk", K(sbinfo->max_blocks)); in shmem_show_options()
4895 if (sbinfo->max_inodes != shmem_default_max_inodes()) in shmem_show_options()
4896 seq_printf(seq, ",nr_inodes=%lu", sbinfo->max_inodes); in shmem_show_options()
4897 if (sbinfo->mode != (0777 | S_ISVTX)) in shmem_show_options()
4898 seq_printf(seq, ",mode=%03ho", sbinfo->mode); in shmem_show_options()
4899 if (!uid_eq(sbinfo->uid, GLOBAL_ROOT_UID)) in shmem_show_options()
4901 from_kuid_munged(&init_user_ns, sbinfo->uid)); in shmem_show_options()
4902 if (!gid_eq(sbinfo->gid, GLOBAL_ROOT_GID)) in shmem_show_options()
4904 from_kgid_munged(&init_user_ns, sbinfo->gid)); in shmem_show_options()
4909 * /proc/config.gz to confirm 64-bit inums were successfully applied in shmem_show_options()
4912 * We hide it when inode64 isn't the default and we are using 32-bit in shmem_show_options()
4918 * +-----------------+-----------------+ in shmem_show_options()
4920 * +------------------+-----------------+-----------------+ in shmem_show_options()
4923 * +------------------+-----------------+-----------------+ in shmem_show_options()
4926 if (IS_ENABLED(CONFIG_TMPFS_INODE64) || sbinfo->full_inums) in shmem_show_options()
4927 seq_printf(seq, ",inode%d", (sbinfo->full_inums ? 64 : 32)); in shmem_show_options()
4930 if (sbinfo->huge) in shmem_show_options()
4931 seq_printf(seq, ",huge=%s", shmem_format_huge(sbinfo->huge)); in shmem_show_options()
4936 if (sbinfo->noswap) in shmem_show_options()
4939 if (sb_has_quota_active(root->d_sb, USRQUOTA)) in shmem_show_options()
4941 if (sb_has_quota_active(root->d_sb, GRPQUOTA)) in shmem_show_options()
4943 if (sbinfo->qlimits.usrquota_bhardlimit) in shmem_show_options()
4945 sbinfo->qlimits.usrquota_bhardlimit); in shmem_show_options()
4946 if (sbinfo->qlimits.grpquota_bhardlimit) in shmem_show_options()
4948 sbinfo->qlimits.grpquota_bhardlimit); in shmem_show_options()
4949 if (sbinfo->qlimits.usrquota_ihardlimit) in shmem_show_options()
4951 sbinfo->qlimits.usrquota_ihardlimit); in shmem_show_options()
4952 if (sbinfo->qlimits.grpquota_ihardlimit) in shmem_show_options()
4954 sbinfo->qlimits.grpquota_ihardlimit); in shmem_show_options()
4966 if (sb->s_encoding) in shmem_put_super()
4967 utf8_unload(sb->s_encoding); in shmem_put_super()
4973 free_percpu(sbinfo->ino_batch); in shmem_put_super()
4974 percpu_counter_destroy(&sbinfo->used_blocks); in shmem_put_super()
4975 mpol_put(sbinfo->mpol); in shmem_put_super()
4977 sb->s_fs_info = NULL; in shmem_put_super()
4990 struct shmem_options *ctx = fc->fs_private; in shmem_fill_super()
4993 int error = -ENOMEM; in shmem_fill_super()
5001 sb->s_fs_info = sbinfo; in shmem_fill_super()
5009 if (!(sb->s_flags & SB_KERNMOUNT)) { in shmem_fill_super()
5010 if (!(ctx->seen & SHMEM_SEEN_BLOCKS)) in shmem_fill_super()
5011 ctx->blocks = shmem_default_max_blocks(); in shmem_fill_super()
5012 if (!(ctx->seen & SHMEM_SEEN_INODES)) in shmem_fill_super()
5013 ctx->inodes = shmem_default_max_inodes(); in shmem_fill_super()
5014 if (!(ctx->seen & SHMEM_SEEN_INUMS)) in shmem_fill_super()
5015 ctx->full_inums = IS_ENABLED(CONFIG_TMPFS_INODE64); in shmem_fill_super()
5016 sbinfo->noswap = ctx->noswap; in shmem_fill_super()
5018 sb->s_flags |= SB_NOUSER; in shmem_fill_super()
5020 sb->s_export_op = &shmem_export_ops; in shmem_fill_super()
5021 sb->s_flags |= SB_NOSEC | SB_I_VERSION; in shmem_fill_super()
5024 if (!ctx->encoding && ctx->strict_encoding) { in shmem_fill_super()
5026 error = -EINVAL; in shmem_fill_super()
5030 if (ctx->encoding) { in shmem_fill_super()
5031 sb->s_encoding = ctx->encoding; in shmem_fill_super()
5032 sb->s_d_op = &shmem_ci_dentry_ops; in shmem_fill_super()
5033 if (ctx->strict_encoding) in shmem_fill_super()
5034 sb->s_encoding_flags = SB_ENC_STRICT_MODE_FL; in shmem_fill_super()
5039 sb->s_flags |= SB_NOUSER; in shmem_fill_super()
5041 sbinfo->max_blocks = ctx->blocks; in shmem_fill_super()
5042 sbinfo->max_inodes = ctx->inodes; in shmem_fill_super()
5043 sbinfo->free_ispace = sbinfo->max_inodes * BOGO_INODE_SIZE; in shmem_fill_super()
5044 if (sb->s_flags & SB_KERNMOUNT) { in shmem_fill_super()
5045 sbinfo->ino_batch = alloc_percpu(ino_t); in shmem_fill_super()
5046 if (!sbinfo->ino_batch) in shmem_fill_super()
5049 sbinfo->uid = ctx->uid; in shmem_fill_super()
5050 sbinfo->gid = ctx->gid; in shmem_fill_super()
5051 sbinfo->full_inums = ctx->full_inums; in shmem_fill_super()
5052 sbinfo->mode = ctx->mode; in shmem_fill_super()
5054 if (ctx->seen & SHMEM_SEEN_HUGE) in shmem_fill_super()
5055 sbinfo->huge = ctx->huge; in shmem_fill_super()
5057 sbinfo->huge = tmpfs_huge; in shmem_fill_super()
5059 sbinfo->mpol = ctx->mpol; in shmem_fill_super()
5060 ctx->mpol = NULL; in shmem_fill_super()
5062 raw_spin_lock_init(&sbinfo->stat_lock); in shmem_fill_super()
5063 if (percpu_counter_init(&sbinfo->used_blocks, 0, GFP_KERNEL)) in shmem_fill_super()
5065 spin_lock_init(&sbinfo->shrinklist_lock); in shmem_fill_super()
5066 INIT_LIST_HEAD(&sbinfo->shrinklist); in shmem_fill_super()
5068 sb->s_maxbytes = MAX_LFS_FILESIZE; in shmem_fill_super()
5069 sb->s_blocksize = PAGE_SIZE; in shmem_fill_super()
5070 sb->s_blocksize_bits = PAGE_SHIFT; in shmem_fill_super()
5071 sb->s_magic = TMPFS_MAGIC; in shmem_fill_super()
5072 sb->s_op = &shmem_ops; in shmem_fill_super()
5073 sb->s_time_gran = 1; in shmem_fill_super()
5075 sb->s_xattr = shmem_xattr_handlers; in shmem_fill_super()
5078 sb->s_flags |= SB_POSIXACL; in shmem_fill_super()
5085 if (ctx->seen & SHMEM_SEEN_QUOTA) { in shmem_fill_super()
5086 sb->dq_op = &shmem_quota_operations; in shmem_fill_super()
5087 sb->s_qcop = &dquot_quotactl_sysfile_ops; in shmem_fill_super()
5088 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; in shmem_fill_super()
5091 memcpy(&sbinfo->qlimits, &ctx->qlimits, in shmem_fill_super()
5094 if (shmem_enable_quotas(sb, ctx->quota_types)) in shmem_fill_super()
5100 S_IFDIR | sbinfo->mode, 0, VM_NORESERVE); in shmem_fill_super()
5105 inode->i_uid = sbinfo->uid; in shmem_fill_super()
5106 inode->i_gid = sbinfo->gid; in shmem_fill_super()
5107 sb->s_root = d_make_root(inode); in shmem_fill_super()
5108 if (!sb->s_root) in shmem_fill_super()
5124 struct shmem_options *ctx = fc->fs_private; in shmem_free_fc()
5127 mpol_put(ctx->mpol); in shmem_free_fc()
5150 return &info->vfs_inode; in shmem_alloc_inode()
5155 if (S_ISLNK(inode->i_mode)) in shmem_free_in_core_inode()
5156 kfree(inode->i_link); in shmem_free_in_core_inode()
5162 if (S_ISREG(inode->i_mode)) in shmem_destroy_inode()
5163 mpol_free_shared_policy(&SHMEM_I(inode)->policy); in shmem_destroy_inode()
5164 if (S_ISDIR(inode->i_mode)) in shmem_destroy_inode()
5171 inode_init_once(&info->vfs_inode); in shmem_init_inode()
5313 return -ENOMEM; in shmem_init_fs_context()
5315 ctx->mode = 0777 | S_ISVTX; in shmem_init_fs_context()
5316 ctx->uid = current_fsuid(); in shmem_init_fs_context()
5317 ctx->gid = current_fsgid(); in shmem_init_fs_context()
5320 ctx->encoding = NULL; in shmem_init_fs_context()
5323 fc->fs_private = ctx; in shmem_init_fs_context()
5324 fc->ops = &shmem_fs_context_ops; in shmem_init_fs_context()
5389 return -ENOMEM; in tmpfs_sysfs_init()
5432 SHMEM_SB(shm_mnt->mnt_sb)->huge = shmem_huge; in shmem_init()
5437 * Default to setting PMD-sized THP to inherit the global setting and in shmem_init()
5438 * disable all other multi-size THPs. in shmem_init()
5481 struct kobj_attribute *attr, const char *buf, size_t count) in shmem_enabled_store() argument
5486 if (count + 1 > sizeof(tmp)) in shmem_enabled_store()
5487 return -EINVAL; in shmem_enabled_store()
5488 memcpy(tmp, buf, count); in shmem_enabled_store()
5489 tmp[count] = '\0'; in shmem_enabled_store()
5490 if (count && tmp[count - 1] == '\n') in shmem_enabled_store()
5491 tmp[count - 1] = '\0'; in shmem_enabled_store()
5494 if (huge == -EINVAL) in shmem_enabled_store()
5499 SHMEM_SB(shm_mnt->mnt_sb)->huge = shmem_huge; in shmem_enabled_store()
5502 return err ? err : count; in shmem_enabled_store()
5511 int order = to_thpsize(kobj)->order; in thpsize_shmem_enabled_show()
5530 const char *buf, size_t count) in thpsize_shmem_enabled_store() argument
5532 int order = to_thpsize(kobj)->order; in thpsize_shmem_enabled_store()
5533 ssize_t ret = count; in thpsize_shmem_enabled_store()
5543 /* Do not override huge allocation policy with non-PMD sized mTHP */ in thpsize_shmem_enabled_store()
5546 return -EINVAL; in thpsize_shmem_enabled_store()
5576 ret = -EINVAL; in thpsize_shmem_enabled_store()
5599 if (huge == -EINVAL) { in setup_transparent_hugepage_shmem()
5650 if (strchr(subtoken, '-')) { in setup_thp_shmem()
5651 start_size = strsep(&subtoken, "-"); in setup_thp_shmem()
5679 nr = end - start + 1; in setup_thp_shmem()
5730 * tiny-shmem: simple shmemfs and tmpfs using ramfs code
5733 * shmem code (swap-backed and resource-limited) are outweighed by
5773 return mm_get_unmapped_area(current->mm, file, addr, len, pgoff, flags); in shmem_get_unmapped_area()
5779 truncate_inode_pages_range(inode->i_mapping, lstart, lend); in shmem_truncate_range()
5794 return inode ? inode : ERR_PTR(-ENOSPC); in shmem_get_inode()
5811 return ERR_PTR(-EINVAL); in __shmem_file_setup()
5814 return ERR_PTR(-ENOMEM); in __shmem_file_setup()
5817 return ERR_PTR(-EINVAL); in __shmem_file_setup()
5819 inode = shmem_get_inode(&nop_mnt_idmap, mnt->mnt_sb, NULL, in __shmem_file_setup()
5825 inode->i_flags |= i_flags; in __shmem_file_setup()
5826 inode->i_size = size; in __shmem_file_setup()
5838 * shmem_kernel_file_setup - get an unlinked file living in tmpfs which must be
5845 * @flags: VM_NORESERVE suppresses pre-accounting of the entire object size
5854 * shmem_file_setup - get an unlinked file living in tmpfs
5857 * @flags: VM_NORESERVE suppresses pre-accounting of the entire object size
5866 * shmem_file_setup_with_mnt - get an unlinked file living in tmpfs
5870 * @flags: VM_NORESERVE suppresses pre-accounting of the entire object size
5880 * shmem_zero_setup - setup a shared anonymous mapping
5886 loff_t size = vma->vm_end - vma->vm_start; in shmem_zero_setup()
5894 file = shmem_kernel_file_setup("dev/zero", size, vma->vm_flags); in shmem_zero_setup()
5898 if (vma->vm_file) in shmem_zero_setup()
5899 fput(vma->vm_file); in shmem_zero_setup()
5900 vma->vm_file = file; in shmem_zero_setup()
5901 vma->vm_ops = &shmem_anon_vm_ops; in shmem_zero_setup()
5907 * shmem_read_folio_gfp - read into page cache, using specified page allocation flags.
5914 * But read_cache_page_gfp() uses the ->read_folio() method: which does not
5925 struct inode *inode = mapping->host; in shmem_read_folio_gfp()
5952 return &folio->page; in shmem_read_mapping_page_gfp()
5957 return ERR_PTR(-EIO); in shmem_read_mapping_page_gfp()