diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-25 21:29:09 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-25 21:29:09 +0300 |
commit | 7b46588f364f4f40c25f43ceabb6f705d20793e2 (patch) | |
tree | 29e80019ee791abe58176161f3ae2b766749b808 /fs | |
parent | 915f3e3f76c05b2da93c4cc278eebc2d9219d9f4 (diff) | |
parent | 95330473636e5e4546f94874c957c3be66bb2140 (diff) | |
download | linux-7b46588f364f4f40c25f43ceabb6f705d20793e2.tar.xz |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
- almost all of the rest of MM
- misc bits
- KASAN updates
- procfs
- lib/ updates
- checkpatch updates
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (124 commits)
checkpatch: remove false unbalanced braces warning
checkpatch: notice unbalanced else braces in a patch
checkpatch: add another old address for the FSF
checkpatch: update $logFunctions
checkpatch: warn on logging continuations
checkpatch: warn on embedded function names
lib/lz4: remove back-compat wrappers
fs/pstore: fs/squashfs: change usage of LZ4 to work with new LZ4 version
crypto: change LZ4 modules to work with new LZ4 module version
lib/decompress_unlz4: change module to work with new LZ4 module version
lib: update LZ4 compressor module
lib/test_sort.c: make it explicitly non-modular
lib: add CONFIG_TEST_SORT to enable self-test of sort()
rbtree: use designated initializers
linux/kernel.h: fix DIV_ROUND_CLOSEST to support negative divisors
lib/find_bit.c: micro-optimise find_next_*_bit
lib: add module support to atomic64 tests
lib: add module support to glob tests
lib: add module support to crc32 tests
kernel/ksysfs.c: add __ro_after_init to bin_attribute structure
...
Diffstat (limited to 'fs')
-rw-r--r-- | fs/9p/vfs_file.c | 4 | ||||
-rw-r--r-- | fs/aio.c | 2 | ||||
-rw-r--r-- | fs/btrfs/ctree.h | 2 | ||||
-rw-r--r-- | fs/btrfs/inode.c | 6 | ||||
-rw-r--r-- | fs/ceph/addr.c | 8 | ||||
-rw-r--r-- | fs/cifs/file.c | 2 | ||||
-rw-r--r-- | fs/dax.c | 59 | ||||
-rw-r--r-- | fs/ext2/file.c | 19 | ||||
-rw-r--r-- | fs/ext4/ext4.h | 4 | ||||
-rw-r--r-- | fs/ext4/file.c | 40 | ||||
-rw-r--r-- | fs/ext4/inode.c | 9 | ||||
-rw-r--r-- | fs/f2fs/file.c | 7 | ||||
-rw-r--r-- | fs/fuse/file.c | 6 | ||||
-rw-r--r-- | fs/gfs2/file.c | 8 | ||||
-rw-r--r-- | fs/iomap.c | 5 | ||||
-rw-r--r-- | fs/kernfs/file.c | 13 | ||||
-rw-r--r-- | fs/ncpfs/mmap.c | 7 | ||||
-rw-r--r-- | fs/nfs/file.c | 4 | ||||
-rw-r--r-- | fs/nilfs2/file.c | 3 | ||||
-rw-r--r-- | fs/ocfs2/mmap.c | 15 | ||||
-rw-r--r-- | fs/proc/base.c | 152 | ||||
-rw-r--r-- | fs/proc/generic.c | 11 | ||||
-rw-r--r-- | fs/proc/inode.c | 2 | ||||
-rw-r--r-- | fs/proc/root.c | 3 | ||||
-rw-r--r-- | fs/proc/vmcore.c | 8 | ||||
-rw-r--r-- | fs/pstore/platform.c | 22 | ||||
-rw-r--r-- | fs/squashfs/lz4_wrapper.c | 12 | ||||
-rw-r--r-- | fs/ubifs/file.c | 5 | ||||
-rw-r--r-- | fs/userfaultfd.c | 109 | ||||
-rw-r--r-- | fs/xfs/xfs_file.c | 38 | ||||
-rw-r--r-- | fs/xfs/xfs_trace.h | 2 |
31 files changed, 327 insertions, 260 deletions
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index 6a0f3fa85ef7..3de3b4a89d89 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -534,11 +534,11 @@ v9fs_mmap_file_mmap(struct file *filp, struct vm_area_struct *vma) } static int -v9fs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +v9fs_vm_page_mkwrite(struct vm_fault *vmf) { struct v9fs_inode *v9inode; struct page *page = vmf->page; - struct file *filp = vma->vm_file; + struct file *filp = vmf->vma->vm_file; struct inode *inode = file_inode(filp); @@ -512,7 +512,7 @@ static int aio_setup_ring(struct kioctx *ctx) ctx->mmap_base = do_mmap_pgoff(ctx->aio_ring_file, 0, ctx->mmap_size, PROT_READ | PROT_WRITE, - MAP_SHARED, 0, &unused); + MAP_SHARED, 0, &unused, NULL); up_write(&mm->mmap_sem); if (IS_ERR((void *)ctx->mmap_base)) { ctx->mmap_size = 0; diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 6a823719b6c5..adf16307842a 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3147,7 +3147,7 @@ int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, int btrfs_merge_bio_hook(struct page *page, unsigned long offset, size_t size, struct bio *bio, unsigned long bio_flags); -int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); +int btrfs_page_mkwrite(struct vm_fault *vmf); int btrfs_readpage(struct file *file, struct page *page); void btrfs_evict_inode(struct inode *inode); int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 1e861a063721..ea1d500cfba6 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -8964,10 +8964,10 @@ again: * beyond EOF, then the page is guaranteed safe against truncation until we * unlock the page. */ -int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +int btrfs_page_mkwrite(struct vm_fault *vmf) { struct page *page = vmf->page; - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct btrfs_ordered_extent *ordered; @@ -9000,7 +9000,7 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) ret = btrfs_delalloc_reserve_space(inode, page_start, reserved_space); if (!ret) { - ret = file_update_time(vma->vm_file); + ret = file_update_time(vmf->vma->vm_file); reserved = 1; } if (ret) { diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index e4b066cd912a..09860c0ec7c1 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -1386,8 +1386,9 @@ static void ceph_restore_sigs(sigset_t *oldset) /* * vm ops */ -static int ceph_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +static int ceph_filemap_fault(struct vm_fault *vmf) { + struct vm_area_struct *vma = vmf->vma; struct inode *inode = file_inode(vma->vm_file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_file_info *fi = vma->vm_file->private_data; @@ -1416,7 +1417,7 @@ static int ceph_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) if ((got & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO)) || ci->i_inline_version == CEPH_INLINE_NONE) { current->journal_info = vma->vm_file; - ret = filemap_fault(vma, vmf); + ret = filemap_fault(vmf); current->journal_info = NULL; } else ret = -EAGAIN; @@ -1477,8 +1478,9 @@ out_restore: /* * Reuse write_begin here for simplicity. */ -static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +static int ceph_page_mkwrite(struct vm_fault *vmf) { + struct vm_area_struct *vma = vmf->vma; struct inode *inode = file_inode(vma->vm_file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_file_info *fi = vma->vm_file->private_data; diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 98dc842e7245..aa3debbba826 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -3282,7 +3282,7 @@ cifs_read(struct file *file, char *read_data, size_t read_size, loff_t *offset) * sure that it doesn't change while being written back. */ static int -cifs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +cifs_page_mkwrite(struct vm_fault *vmf) { struct page *page = vmf->page; @@ -925,12 +925,11 @@ static int dax_insert_mapping(struct address_space *mapping, /** * dax_pfn_mkwrite - handle first write to DAX page - * @vma: The virtual memory area where the fault occurred * @vmf: The description of the fault */ -int dax_pfn_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +int dax_pfn_mkwrite(struct vm_fault *vmf) { - struct file *file = vma->vm_file; + struct file *file = vmf->vma->vm_file; struct address_space *mapping = file->f_mapping; void *entry, **slot; pgoff_t index = vmf->pgoff; @@ -1119,20 +1118,10 @@ static int dax_fault_return(int error) return VM_FAULT_SIGBUS; } -/** - * dax_iomap_fault - handle a page fault on a DAX file - * @vma: The virtual memory area where the fault occurred - * @vmf: The description of the fault - * @ops: iomap ops passed from the file system - * - * When a page fault occurs, filesystems may call this helper in their fault - * or mkwrite handler for DAX files. Assumes the caller has done all the - * necessary locking for the page fault to proceed successfully. - */ -int dax_iomap_fault(struct vm_area_struct *vma, struct vm_fault *vmf, - const struct iomap_ops *ops) +static int dax_iomap_pte_fault(struct vm_fault *vmf, + const struct iomap_ops *ops) { - struct address_space *mapping = vma->vm_file->f_mapping; + struct address_space *mapping = vmf->vma->vm_file->f_mapping; struct inode *inode = mapping->host; unsigned long vaddr = vmf->address; loff_t pos = (loff_t)vmf->pgoff << PAGE_SHIFT; @@ -1205,11 +1194,11 @@ int dax_iomap_fault(struct vm_area_struct *vma, struct vm_fault *vmf, case IOMAP_MAPPED: if (iomap.flags & IOMAP_F_NEW) { count_vm_event(PGMAJFAULT); - mem_cgroup_count_vm_event(vma->vm_mm, PGMAJFAULT); + mem_cgroup_count_vm_event(vmf->vma->vm_mm, PGMAJFAULT); major = VM_FAULT_MAJOR; } error = dax_insert_mapping(mapping, iomap.bdev, sector, - PAGE_SIZE, &entry, vma, vmf); + PAGE_SIZE, &entry, vmf->vma, vmf); /* -EBUSY is fine, somebody else faulted on the same PTE */ if (error == -EBUSY) error = 0; @@ -1247,7 +1236,6 @@ int dax_iomap_fault(struct vm_area_struct *vma, struct vm_fault *vmf, } return vmf_ret; } -EXPORT_SYMBOL_GPL(dax_iomap_fault); #ifdef CONFIG_FS_DAX_PMD /* @@ -1338,7 +1326,8 @@ fallback: return VM_FAULT_FALLBACK; } -int dax_iomap_pmd_fault(struct vm_fault *vmf, const struct iomap_ops *ops) +static int dax_iomap_pmd_fault(struct vm_fault *vmf, + const struct iomap_ops *ops) { struct vm_area_struct *vma = vmf->vma; struct address_space *mapping = vma->vm_file->f_mapping; @@ -1446,5 +1435,33 @@ out: trace_dax_pmd_fault_done(inode, vmf, max_pgoff, result); return result; } -EXPORT_SYMBOL_GPL(dax_iomap_pmd_fault); +#else +static int dax_iomap_pmd_fault(struct vm_fault *vmf, struct iomap_ops *ops) +{ + return VM_FAULT_FALLBACK; +} #endif /* CONFIG_FS_DAX_PMD */ + +/** + * dax_iomap_fault - handle a page fault on a DAX file + * @vmf: The description of the fault + * @ops: iomap ops passed from the file system + * + * When a page fault occurs, filesystems may call this helper in + * their fault handler for DAX files. dax_iomap_fault() assumes the caller + * has done all the necessary locking for page fault to proceed + * successfully. + */ +int dax_iomap_fault(struct vm_fault *vmf, enum page_entry_size pe_size, + const struct iomap_ops *ops) +{ + switch (pe_size) { + case PE_SIZE_PTE: + return dax_iomap_pte_fault(vmf, ops); + case PE_SIZE_PMD: + return dax_iomap_pmd_fault(vmf, ops); + default: + return VM_FAULT_FALLBACK; + } +} +EXPORT_SYMBOL_GPL(dax_iomap_fault); diff --git a/fs/ext2/file.c b/fs/ext2/file.c index b0f241528a30..b21891a6bfca 100644 --- a/fs/ext2/file.c +++ b/fs/ext2/file.c @@ -87,19 +87,19 @@ out_unlock: * The default page_lock and i_size verification done by non-DAX fault paths * is sufficient because ext2 doesn't support hole punching. */ -static int ext2_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +static int ext2_dax_fault(struct vm_fault *vmf) { - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); struct ext2_inode_info *ei = EXT2_I(inode); int ret; if (vmf->flags & FAULT_FLAG_WRITE) { sb_start_pagefault(inode->i_sb); - file_update_time(vma->vm_file); + file_update_time(vmf->vma->vm_file); } down_read(&ei->dax_sem); - ret = dax_iomap_fault(vma, vmf, &ext2_iomap_ops); + ret = dax_iomap_fault(vmf, PE_SIZE_PTE, &ext2_iomap_ops); up_read(&ei->dax_sem); if (vmf->flags & FAULT_FLAG_WRITE) @@ -107,16 +107,15 @@ static int ext2_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) return ret; } -static int ext2_dax_pfn_mkwrite(struct vm_area_struct *vma, - struct vm_fault *vmf) +static int ext2_dax_pfn_mkwrite(struct vm_fault *vmf) { - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); struct ext2_inode_info *ei = EXT2_I(inode); loff_t size; int ret; sb_start_pagefault(inode->i_sb); - file_update_time(vma->vm_file); + file_update_time(vmf->vma->vm_file); down_read(&ei->dax_sem); /* check that the faulting page hasn't raced with truncate */ @@ -124,7 +123,7 @@ static int ext2_dax_pfn_mkwrite(struct vm_area_struct *vma, if (vmf->pgoff >= size) ret = VM_FAULT_SIGBUS; else - ret = dax_pfn_mkwrite(vma, vmf); + ret = dax_pfn_mkwrite(vmf); up_read(&ei->dax_sem); sb_end_pagefault(inode->i_sb); @@ -134,7 +133,7 @@ static int ext2_dax_pfn_mkwrite(struct vm_area_struct *vma, static const struct vm_operations_struct ext2_dax_vm_ops = { .fault = ext2_dax_fault, /* - * .pmd_fault is not supported for DAX because allocation in ext2 + * .huge_fault is not supported for DAX because allocation in ext2 * cannot be reliably aligned to huge page sizes and so pmd faults * will always fail and fail back to regular faults. */ diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index cee23b684f47..2fd17e8e4984 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2483,8 +2483,8 @@ extern int ext4_writepage_trans_blocks(struct inode *); extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, loff_t lstart, loff_t lend); -extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); -extern int ext4_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf); +extern int ext4_page_mkwrite(struct vm_fault *vmf); +extern int ext4_filemap_fault(struct vm_fault *vmf); extern qsize_t *ext4_get_reserved_space(struct inode *inode); extern int ext4_get_projid(struct inode *inode, kprojid_t *projid); extern void ext4_da_update_reserve_space(struct inode *inode, diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 13021a054fc0..8210c1f43556 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -253,19 +253,20 @@ out: } #ifdef CONFIG_FS_DAX -static int ext4_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +static int ext4_dax_huge_fault(struct vm_fault *vmf, + enum page_entry_size pe_size) { int result; - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); struct super_block *sb = inode->i_sb; bool write = vmf->flags & FAULT_FLAG_WRITE; if (write) { sb_start_pagefault(sb); - file_update_time(vma->vm_file); + file_update_time(vmf->vma->vm_file); } down_read(&EXT4_I(inode)->i_mmap_sem); - result = dax_iomap_fault(vma, vmf, &ext4_iomap_ops); + result = dax_iomap_fault(vmf, pe_size, &ext4_iomap_ops); up_read(&EXT4_I(inode)->i_mmap_sem); if (write) sb_end_pagefault(sb); @@ -273,25 +274,9 @@ static int ext4_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) return result; } -static int -ext4_dax_pmd_fault(struct vm_fault *vmf) +static int ext4_dax_fault(struct vm_fault *vmf) { - int result; - struct inode *inode = file_inode(vmf->vma->vm_file); - struct super_block *sb = inode->i_sb; - bool write = vmf->flags & FAULT_FLAG_WRITE; - - if (write) { - sb_start_pagefault(sb); - file_update_time(vmf->vma->vm_file); - } - down_read(&EXT4_I(inode)->i_mmap_sem); - result = dax_iomap_pmd_fault(vmf, &ext4_iomap_ops); - up_read(&EXT4_I(inode)->i_mmap_sem); - if (write) - sb_end_pagefault(sb); - - return result; + return ext4_dax_huge_fault(vmf, PE_SIZE_PTE); } /* @@ -303,22 +288,21 @@ ext4_dax_pmd_fault(struct vm_fault *vmf) * wp_pfn_shared() fails. Thus fault gets retried and things work out as * desired. */ -static int ext4_dax_pfn_mkwrite(struct vm_area_struct *vma, - struct vm_fault *vmf) +static int ext4_dax_pfn_mkwrite(struct vm_fault *vmf) { - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); struct super_block *sb = inode->i_sb; loff_t size; int ret; sb_start_pagefault(sb); - file_update_time(vma->vm_file); + file_update_time(vmf->vma->vm_file); down_read(&EXT4_I(inode)->i_mmap_sem); size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT; if (vmf->pgoff >= size) ret = VM_FAULT_SIGBUS; else - ret = dax_pfn_mkwrite(vma, vmf); + ret = dax_pfn_mkwrite(vmf); up_read(&EXT4_I(inode)->i_mmap_sem); sb_end_pagefault(sb); @@ -327,7 +311,7 @@ static int ext4_dax_pfn_mkwrite(struct vm_area_struct *vma, static const struct vm_operations_struct ext4_dax_vm_ops = { .fault = ext4_dax_fault, - .pmd_fault = ext4_dax_pmd_fault, + .huge_fault = ext4_dax_huge_fault, .page_mkwrite = ext4_dax_fault, .pfn_mkwrite = ext4_dax_pfn_mkwrite, }; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 75212a6e69f8..41d8e53e5a7f 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5821,8 +5821,9 @@ static int ext4_bh_unmapped(handle_t *handle, struct buffer_head *bh) return !buffer_mapped(bh); } -int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +int ext4_page_mkwrite(struct vm_fault *vmf) { + struct vm_area_struct *vma = vmf->vma; struct page *page = vmf->page; loff_t size; unsigned long len; @@ -5912,13 +5913,13 @@ out: return ret; } -int ext4_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +int ext4_filemap_fault(struct vm_fault *vmf) { - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); int err; down_read(&EXT4_I(inode)->i_mmap_sem); - err = filemap_fault(vma, vmf); + err = filemap_fault(vmf); up_read(&EXT4_I(inode)->i_mmap_sem); return err; diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 49f10dce817d..1edc86e874e3 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -32,11 +32,10 @@ #include "trace.h" #include <trace/events/f2fs.h> -static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, - struct vm_fault *vmf) +static int f2fs_vm_page_mkwrite(struct vm_fault *vmf) { struct page *page = vmf->page; - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct dnode_of_data dn; int err; @@ -58,7 +57,7 @@ static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, f2fs_balance_fs(sbi, dn.node_changed); - file_update_time(vma->vm_file); + file_update_time(vmf->vma->vm_file); lock_page(page); if (unlikely(page->mapping != inode->i_mapping || page_offset(page) > i_size_read(inode) || diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 2401c5dabb2a..e80bfd06daf5 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -2043,12 +2043,12 @@ static void fuse_vma_close(struct vm_area_struct *vma) * - sync(2) * - try_to_free_pages() with order > PAGE_ALLOC_COSTLY_ORDER */ -static int fuse_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +static int fuse_page_mkwrite(struct vm_fault *vmf) { struct page *page = vmf->page; - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); - file_update_time(vma->vm_file); + file_update_time(vmf->vma->vm_file); lock_page(page); if (page->mapping != inode->i_mapping) { unlock_page(page); diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 016c11eaca7c..6fe2a59c6a9a 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -379,10 +379,10 @@ static int gfs2_allocate_page_backing(struct page *page) * blocks allocated on disk to back that page. */ -static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +static int gfs2_page_mkwrite(struct vm_fault *vmf) { struct page *page = vmf->page; - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); struct gfs2_inode *ip = GFS2_I(inode); struct gfs2_sbd *sdp = GFS2_SB(inode); struct gfs2_alloc_parms ap = { .aflags = 0, }; @@ -399,7 +399,7 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) if (ret) goto out; - gfs2_size_hint(vma->vm_file, pos, PAGE_SIZE); + gfs2_size_hint(vmf->vma->vm_file, pos, PAGE_SIZE); gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); ret = gfs2_glock_nq(&gh); @@ -407,7 +407,7 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) goto out_uninit; /* Update file times before taking page lock */ - file_update_time(vma->vm_file); + file_update_time(vmf->vma->vm_file); set_bit(GLF_DIRTY, &ip->i_gl->gl_flags); set_bit(GIF_SW_PAGED, &ip->i_flags); diff --git a/fs/iomap.c b/fs/iomap.c index d89f70bbb952..d209f42cdcb8 100644 --- a/fs/iomap.c +++ b/fs/iomap.c @@ -445,11 +445,10 @@ iomap_page_mkwrite_actor(struct inode *inode, loff_t pos, loff_t length, return length; } -int iomap_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf, - const struct iomap_ops *ops) +int iomap_page_mkwrite(struct vm_fault *vmf, const struct iomap_ops *ops) { struct page *page = vmf->page; - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); unsigned long length; loff_t offset, size; ssize_t ret; diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c index 78219d5644e9..4f0535890b30 100644 --- a/fs/kernfs/file.c +++ b/fs/kernfs/file.c @@ -348,9 +348,9 @@ static void kernfs_vma_open(struct vm_area_struct *vma) kernfs_put_active(of->kn); } -static int kernfs_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +static int kernfs_vma_fault(struct vm_fault *vmf) { - struct file *file = vma->vm_file; + struct file *file = vmf->vma->vm_file; struct kernfs_open_file *of = kernfs_of(file); int ret; @@ -362,16 +362,15 @@ static int kernfs_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) ret = VM_FAULT_SIGBUS; if (of->vm_ops->fault) - ret = of->vm_ops->fault(vma, vmf); + ret = of->vm_ops->fault(vmf); kernfs_put_active(of->kn); return ret; } -static int kernfs_vma_page_mkwrite(struct vm_area_struct *vma, - struct vm_fault *vmf) +static int kernfs_vma_page_mkwrite(struct vm_fault *vmf) { - struct file *file = vma->vm_file; + struct file *file = vmf->vma->vm_file; struct kernfs_open_file *of = kernfs_of(file); int ret; @@ -383,7 +382,7 @@ static int kernfs_vma_page_mkwrite(struct vm_area_struct *vma, ret = 0; if (of->vm_ops->page_mkwrite) - ret = of->vm_ops->page_mkwrite(vma, vmf); + ret = of->vm_ops->page_mkwrite(vmf); else file_update_time(file); diff --git a/fs/ncpfs/mmap.c b/fs/ncpfs/mmap.c index 39f57bef8531..0c3905e0542e 100644 --- a/fs/ncpfs/mmap.c +++ b/fs/ncpfs/mmap.c @@ -27,10 +27,9 @@ * XXX: how are we excluding truncate/invalidate here? Maybe need to lock * page? */ -static int ncp_file_mmap_fault(struct vm_area_struct *area, - struct vm_fault *vmf) +static int ncp_file_mmap_fault(struct vm_fault *vmf) { - struct inode *inode = file_inode(area->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); char *pg_addr; unsigned int already_read; unsigned int count; @@ -90,7 +89,7 @@ static int ncp_file_mmap_fault(struct vm_area_struct *area, * -- nyc */ count_vm_event(PGMAJFAULT); - mem_cgroup_count_vm_event(area->vm_mm, PGMAJFAULT); + mem_cgroup_count_vm_event(vmf->vma->vm_mm, PGMAJFAULT); return VM_FAULT_MAJOR; } diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 26dbe8b0c10d..668213984d68 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -528,10 +528,10 @@ const struct address_space_operations nfs_file_aops = { * writable, implying that someone is about to modify the page through a * shared-writable mapping */ -static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +static int nfs_vm_page_mkwrite(struct vm_fault *vmf) { struct page *page = vmf->page; - struct file *filp = vma->vm_file; + struct file *filp = vmf->vma->vm_file; struct inode *inode = file_inode(filp); unsigned pagelen; int ret = VM_FAULT_NOPAGE; diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c index 547381f3ce13..c5fa3dee72fc 100644 --- a/fs/nilfs2/file.c +++ b/fs/nilfs2/file.c @@ -51,8 +51,9 @@ int nilfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) return err; } -static int nilfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +static int nilfs_page_mkwrite(struct vm_fault *vmf) { + struct vm_area_struct *vma = vmf->vma; struct page *page = vmf->page; struct inode *inode = file_inode(vma->vm_file); struct nilfs_transaction_info ti; diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c index 429088786e93..098f5c712569 100644 --- a/fs/ocfs2/mmap.c +++ b/fs/ocfs2/mmap.c @@ -44,17 +44,18 @@ #include "ocfs2_trace.h" -static int ocfs2_fault(struct vm_area_struct *area, struct vm_fault *vmf) +static int ocfs2_fault(struct vm_fault *vmf) { + struct vm_area_struct *vma = vmf->vma; sigset_t oldset; int ret; ocfs2_block_signals(&oldset); - ret = filemap_fault(area, vmf); + ret = filemap_fault(vmf); ocfs2_unblock_signals(&oldset); - trace_ocfs2_fault(OCFS2_I(area->vm_file->f_mapping->host)->ip_blkno, - area, vmf->page, vmf->pgoff); + trace_ocfs2_fault(OCFS2_I(vma->vm_file->f_mapping->host)->ip_blkno, + vma, vmf->page, vmf->pgoff); return ret; } @@ -127,10 +128,10 @@ out: return ret; } -static int ocfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) +static int ocfs2_page_mkwrite(struct vm_fault *vmf) { struct page *page = vmf->page; - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); struct buffer_head *di_bh = NULL; sigset_t oldset; int ret; @@ -160,7 +161,7 @@ static int ocfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) */ down_write(&OCFS2_I(inode)->ip_alloc_sem); - ret = __ocfs2_page_mkwrite(vma->vm_file, di_bh, page); + ret = __ocfs2_page_mkwrite(vmf->vma->vm_file, di_bh, page); up_write(&OCFS2_I(inode)->ip_alloc_sem); diff --git a/fs/proc/base.c b/fs/proc/base.c index b73b4de8fb36..b8f06273353e 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -292,101 +292,69 @@ static ssize_t proc_pid_cmdline_read(struct file *file, char __user *buf, } } else { /* - * Command line (1 string) occupies ARGV and maybe - * extends into ENVP. - */ - if (len1 + len2 <= *pos) - goto skip_argv_envp; - if (len1 <= *pos) - goto skip_argv; - - p = arg_start + *pos; - len = len1 - *pos; - while (count > 0 && len > 0) { - unsigned int _count, l; - int nr_read; - bool final; - - _count = min3(count, len, PAGE_SIZE); - nr_read = access_remote_vm(mm, p, page, _count, 0); - if (nr_read < 0) - rv = nr_read; - if (nr_read <= 0) - goto out_free_page; - - /* - * Command line can be shorter than whole ARGV - * even if last "marker" byte says it is not. - */ - final = false; - l = strnlen(page, nr_read); - if (l < nr_read) { - nr_read = l; - final = true; - } - - if (copy_to_user(buf, page, nr_read)) { - rv = -EFAULT; - goto out_free_page; - } - - p += nr_read; - len -= nr_read; - buf += nr_read; - count -= nr_read; - rv += nr_read; - - if (final) - goto out_free_page; - } -skip_argv: - /* * Command line (1 string) occupies ARGV and * extends into ENVP. */ - if (len1 <= *pos) { - p = env_start + *pos - len1; - len = len1 + len2 - *pos; - } else { - p = env_start; - len = len2; + struct { + unsigned long p; + unsigned long len; + } cmdline[2] = { + { .p = arg_start, .len = len1 }, + { .p = env_start, .len = len2 }, + }; + loff_t pos1 = *pos; + unsigned int i; + + i = 0; + while (i < 2 && pos1 >= cmdline[i].len) { + pos1 -= cmdline[i].len; + i++; } - while (count > 0 && len > 0) { - unsigned int _count, l; - int nr_read; - bool final; - - _count = min3(count, len, PAGE_SIZE); - nr_read = access_remote_vm(mm, p, page, _count, 0); - if (nr_read < 0) - rv = nr_read; - if (nr_read <= 0) - goto out_free_page; - - /* Find EOS. */ - final = false; - l = strnlen(page, nr_read); - if (l < nr_read) { - nr_read = l; - final = true; - } - - if (copy_to_user(buf, page, nr_read)) { - rv = -EFAULT; - goto out_free_page; + while (i < 2) { + p = cmdline[i].p + pos1; + len = cmdline[i].len - pos1; + while (count > 0 && len > 0) { + unsigned int _count, l; + int nr_read; + bool final; + + _count = min3(count, len, PAGE_SIZE); + nr_read = access_remote_vm(mm, p, page, _count, 0); + if (nr_read < 0) + rv = nr_read; + if (nr_read <= 0) + goto out_free_page; + + /* + * Command line can be shorter than whole ARGV + * even if last "marker" byte says it is not. + */ + final = false; + l = strnlen(page, nr_read); + if (l < nr_read) { + nr_read = l; + final = true; + } + + if (copy_to_user(buf, page, nr_read)) { + rv = -EFAULT; + goto out_free_page; + } + + p += nr_read; + len -= nr_read; + buf += nr_read; + count -= nr_read; + rv += nr_read; + + if (final) + goto out_free_page; } - p += nr_read; - len -= nr_read; - buf += nr_read; - count -= nr_read; - rv += nr_read; - - if (final) - goto out_free_page; + /* Only first chunk can be read partially. */ + pos1 = 0; + i++; } -skip_argv_envp: - ; } out_free_page: @@ -729,11 +697,11 @@ static int proc_pid_permission(struct inode *inode, int mask) task = get_proc_task(inode); if (!task) return -ESRCH; - has_perms = has_pid_permissions(pid, task, 1); + has_perms = has_pid_permissions(pid, task, HIDEPID_NO_ACCESS); put_task_struct(task); if (!has_perms) { - if (pid->hide_pid == 2) { + if (pid->hide_pid == HIDEPID_INVISIBLE) { /* * Let's make getdents(), stat(), and open() * consistent with each other. If a process @@ -1769,7 +1737,7 @@ int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) stat->gid = GLOBAL_ROOT_GID; task = pid_task(proc_pid(inode), PIDTYPE_PID); if (task) { - if (!has_pid_permissions(pid, task, 2)) { + if (!has_pid_permissions(pid, task, HIDEPID_INVISIBLE)) { rcu_read_unlock(); /* * This doesn't prevent learning whether PID exists, @@ -3200,7 +3168,7 @@ int proc_pid_readdir(struct file *file, struct dir_context *ctx) int len; cond_resched(); - if (!has_pid_permissions(ns, iter.task, 2)) + if (!has_pid_permissions(ns, iter.task, HIDEPID_INVISIBLE)) continue; len = snprintf(name, sizeof(name), "%d", iter.tgid); diff --git a/fs/proc/generic.c b/fs/proc/generic.c index f6a01f09f79d..06c73904d497 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -57,9 +57,9 @@ static struct proc_dir_entry *pde_subdir_find(struct proc_dir_entry *dir, struct rb_node *node = dir->subdir.rb_node; while (node) { - struct proc_dir_entry *de = container_of(node, - struct proc_dir_entry, - subdir_node); + struct proc_dir_entry *de = rb_entry(node, + struct proc_dir_entry, + subdir_node); int result = proc_match(len, name, de); if (result < 0) @@ -80,8 +80,9 @@ static bool pde_subdir_insert(struct proc_dir_entry *dir, /* Figure out where to put new node */ while (*new) { - struct proc_dir_entry *this = - container_of(*new, struct proc_dir_entry, subdir_node); + struct proc_dir_entry *this = rb_entry(*new, + struct proc_dir_entry, + subdir_node); int result = proc_match(de->namelen, de->name, this); parent = *new; diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 7ad9ed7958af..2cc7a8030275 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -107,7 +107,7 @@ static int proc_show_options(struct seq_file *seq, struct dentry *root) if (!gid_eq(pid->pid_gid, GLOBAL_ROOT_GID)) seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, pid->pid_gid)); - if (pid->hide_pid != 0) + if (pid->hide_pid != HIDEPID_OFF) seq_printf(seq, ",hidepid=%u", pid->hide_pid); return 0; diff --git a/fs/proc/root.c b/fs/proc/root.c index 1988440b2049..b90da888b81a 100644 --- a/fs/proc/root.c +++ b/fs/proc/root.c @@ -58,7 +58,8 @@ int proc_parse_options(char *options, struct pid_namespace *pid) case Opt_hidepid: if (match_int(&args[0], &option)) return 0; - if (option < 0 || option > 2) { + if (option < HIDEPID_OFF || + option > HIDEPID_INVISIBLE) { pr_err("proc: hidepid value must be between 0 and 2.\n"); return 0; } diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 5105b1599981..885d445afa0d 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -265,10 +265,10 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer, * On s390 the fault handler is used for memory regions that can't be mapped * directly with remap_pfn_range(). */ -static int mmap_vmcore_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +static int mmap_vmcore_fault(struct vm_fault *vmf) { #ifdef CONFIG_S390 - struct address_space *mapping = vma->vm_file->f_mapping; + struct address_space *mapping = vmf->vma->vm_file->f_mapping; pgoff_t index = vmf->pgoff; struct page *page; loff_t offset; @@ -388,7 +388,7 @@ static int remap_oldmem_pfn_checked(struct vm_area_struct *vma, } return 0; fail: - do_munmap(vma->vm_mm, from, len); + do_munmap(vma->vm_mm, from, len, NULL); return -EAGAIN; } @@ -481,7 +481,7 @@ static int mmap_vmcore(struct file *file, struct vm_area_struct *vma) return 0; fail: - do_munmap(vma->vm_mm, vma->vm_start, len); + do_munmap(vma->vm_mm, vma->vm_start, len, NULL); return -EAGAIN; } #else diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 729677e18e36..efab7b64925b 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -342,31 +342,35 @@ static int compress_lz4(const void *in, void *out, size_t inlen, size_t outlen) { int ret; - ret = lz4_compress(in, inlen, out, &outlen, workspace); - if (ret) { - pr_err("lz4_compress error, ret = %d!\n", ret); + ret = LZ4_compress_default(in, out, inlen, outlen, workspace); + if (!ret) { + pr_err("LZ4_compress_default error; compression failed!\n"); return -EIO; } - return outlen; + return ret; } static int decompress_lz4(void *in, void *out, size_t inlen, size_t outlen) { int ret; - ret = lz4_decompress_unknownoutputsize(in, inlen, out, &outlen); - if (ret) { - pr_err("lz4_decompress error, ret = %d!\n", ret); + ret = LZ4_decompress_safe(in, out, inlen, outlen); + if (ret < 0) { + /* + * LZ4_decompress_safe will return an error code + * (< 0) if decompression failed + */ + pr_err("LZ4_decompress_safe error, ret = %d!\n", ret); return -EIO; } - return outlen; + return ret; } static void allocate_lz4(void) { - big_oops_buf_sz = lz4_compressbound(psinfo->bufsize); + big_oops_buf_sz = LZ4_compressBound(psinfo->bufsize); big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL); if (big_oops_buf) { workspace = kmalloc(LZ4_MEM_COMPRESS, GFP_KERNEL); diff --git a/fs/squashfs/lz4_wrapper.c b/fs/squashfs/lz4_wrapper.c index ff4468bd18b0..95da65366548 100644 --- a/fs/squashfs/lz4_wrapper.c +++ b/fs/squashfs/lz4_wrapper.c @@ -97,7 +97,6 @@ static int lz4_uncompress(struct squashfs_sb_info *msblk, void *strm, struct squashfs_lz4 *stream = strm; void *buff = stream->input, *data; int avail, i, bytes = length, res; - size_t dest_len = output->length; for (i = 0; i < b; i++) { avail = min(bytes, msblk->devblksize - offset); @@ -108,12 +107,13 @@ static int lz4_uncompress(struct squashfs_sb_info *msblk, void *strm, put_bh(bh[i]); } - res = lz4_decompress_unknownoutputsize(stream->input, length, - stream->output, &dest_len); - if (res) + res = LZ4_decompress_safe(stream->input, stream->output, + length, output->length); + + if (res < 0) return -EIO; - bytes = dest_len; + bytes = res; data = squashfs_first_page(output); buff = stream->output; while (data) { @@ -128,7 +128,7 @@ static int lz4_uncompress(struct squashfs_sb_info *msblk, void *strm, } squashfs_finish_page(output); - return dest_len; + return res; } const struct squashfs_decompressor squashfs_lz4_comp_ops = { diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index b0d783774c96..d9ae86f96df7 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -1506,11 +1506,10 @@ static int ubifs_releasepage(struct page *page, gfp_t unused_gfp_flags) * mmap()d file has taken write protection fault and is being made writable. * UBIFS must ensure page is budgeted for. */ -static int ubifs_vm_page_mkwrite(struct vm_area_struct *vma, - struct vm_fault *vmf) +static int ubifs_vm_page_mkwrite(struct vm_fault *vmf) { struct page *page = vmf->page; - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); struct ubifs_info *c = inode->i_sb->s_fs_info; struct timespec now = ubifs_current_time(inode); struct ubifs_budget_req req = { .new_page = 1 }; diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c index 18406158e13f..625b7285a37b 100644 --- a/fs/userfaultfd.c +++ b/fs/userfaultfd.c @@ -71,6 +71,13 @@ struct userfaultfd_fork_ctx { struct list_head list; }; +struct userfaultfd_unmap_ctx { + struct userfaultfd_ctx *ctx; + unsigned long start; + unsigned long end; + struct list_head list; +}; + struct userfaultfd_wait_queue { struct uffd_msg msg; wait_queue_t wq; @@ -681,16 +688,16 @@ void mremap_userfaultfd_complete(struct vm_userfaultfd_ctx *vm_ctx, userfaultfd_event_wait_completion(ctx, &ewq); } -void madvise_userfault_dontneed(struct vm_area_struct *vma, - struct vm_area_struct **prev, - unsigned long start, unsigned long end) +void userfaultfd_remove(struct vm_area_struct *vma, + struct vm_area_struct **prev, + unsigned long start, unsigned long end) { struct mm_struct *mm = vma->vm_mm; struct userfaultfd_ctx *ctx; struct userfaultfd_wait_queue ewq; ctx = vma->vm_userfaultfd_ctx.ctx; - if (!ctx || !(ctx->features & UFFD_FEATURE_EVENT_MADVDONTNEED)) + if (!ctx || !(ctx->features & UFFD_FEATURE_EVENT_REMOVE)) return; userfaultfd_ctx_get(ctx); @@ -700,15 +707,101 @@ void madvise_userfault_dontneed(struct vm_area_struct *vma, msg_init(&ewq.msg); - ewq.msg.event = UFFD_EVENT_MADVDONTNEED; - ewq.msg.arg.madv_dn.start = start; - ewq.msg.arg.madv_dn.end = end; + ewq.msg.event = UFFD_EVENT_REMOVE; + ewq.msg.arg.remove.start = start; + ewq.msg.arg.remove.end = end; userfaultfd_event_wait_completion(ctx, &ewq); down_read(&mm->mmap_sem); } +static bool has_unmap_ctx(struct userfaultfd_ctx *ctx, struct list_head *unmaps, + unsigned long start, unsigned long end) +{ + struct userfaultfd_unmap_ctx *unmap_ctx; + + list_for_each_entry(unmap_ctx, unmaps, list) + if (unmap_ctx->ctx == ctx && unmap_ctx->start == start && + unmap_ctx->end == end) + return true; + + return false; +} + +int userfaultfd_unmap_prep(struct vm_area_struct *vma, + unsigned long start, unsigned long end, + struct list_head *unmaps) +{ + for ( ; vma && vma->vm_start < end; vma = vma->vm_next) { + struct userfaultfd_unmap_ctx *unmap_ctx; + struct userfaultfd_ctx *ctx = vma->vm_userfaultfd_ctx.ctx; + + if (!ctx || !(ctx->features & UFFD_FEATURE_EVENT_UNMAP) || + has_unmap_ctx(ctx, unmaps, start, end)) + continue; + + unmap_ctx = kzalloc(sizeof(*unmap_ctx), GFP_KERNEL); + if (!unmap_ctx) + return -ENOMEM; + + userfaultfd_ctx_get(ctx); + unmap_ctx->ctx = ctx; + unmap_ctx->start = start; + unmap_ctx->end = end; + list_add_tail(&unmap_ctx->list, unmaps); + } + + return 0; +} + +void userfaultfd_unmap_complete(struct mm_struct *mm, struct list_head *uf) +{ + struct userfaultfd_unmap_ctx *ctx, *n; + struct userfaultfd_wait_queue ewq; + + list_for_each_entry_safe(ctx, n, uf, list) { + msg_init(&ewq.msg); + + ewq.msg.event = UFFD_EVENT_UNMAP; + ewq.msg.arg.remove.start = ctx->start; + ewq.msg.arg.remove.end = ctx->end; + + userfaultfd_event_wait_completion(ctx->ctx, &ewq); + + list_del(&ctx->list); + kfree(ctx); + } +} + +void userfaultfd_exit(struct mm_struct *mm) +{ + struct vm_area_struct *vma = mm->mmap; + + /* + * We can do the vma walk without locking because the caller + * (exit_mm) knows it now has exclusive access + */ + while (vma) { + struct userfaultfd_ctx *ctx = vma->vm_userfaultfd_ctx.ctx; + + if (ctx && (ctx->features & UFFD_FEATURE_EVENT_EXIT)) { + struct userfaultfd_wait_queue ewq; + + userfaultfd_ctx_get(ctx); + + msg_init(&ewq.msg); + ewq.msg.event = UFFD_EVENT_EXIT; + + userfaultfd_event_wait_completion(ctx, &ewq); + + ctx->features &= ~UFFD_FEATURE_EVENT_EXIT; + } + + vma = vma->vm_next; + } +} + static int userfaultfd_release(struct inode *inode, struct file *file) { struct userfaultfd_ctx *ctx = file->private_data; @@ -1514,6 +1607,8 @@ static int userfaultfd_copy(struct userfaultfd_ctx *ctx, ret = mcopy_atomic(ctx->mm, uffdio_copy.dst, uffdio_copy.src, uffdio_copy.len); mmput(ctx->mm); + } else { + return -ENOSPC; } if (unlikely(put_user(ret, &user_uffdio_copy->copy))) return -EFAULT; diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 022014016d80..a50eca676670 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1379,22 +1379,21 @@ xfs_file_llseek( */ STATIC int xfs_filemap_page_mkwrite( - struct vm_area_struct *vma, struct vm_fault *vmf) { - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); int ret; trace_xfs_filemap_page_mkwrite(XFS_I(inode)); sb_start_pagefault(inode->i_sb); - file_update_time(vma->vm_file); + file_update_time(vmf->vma->vm_file); xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED); if (IS_DAX(inode)) { - ret = dax_iomap_fault(vma, vmf, &xfs_iomap_ops); + ret = dax_iomap_fault(vmf, PE_SIZE_PTE, &xfs_iomap_ops); } else { - ret = iomap_page_mkwrite(vma, vmf, &xfs_iomap_ops); + ret = iomap_page_mkwrite(vmf, &xfs_iomap_ops); ret = block_page_mkwrite_return(ret); } @@ -1406,23 +1405,22 @@ xfs_filemap_page_mkwrite( STATIC int xfs_filemap_fault( - struct vm_area_struct *vma, struct vm_fault *vmf) { - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); int ret; trace_xfs_filemap_fault(XFS_I(inode)); /* DAX can shortcut the normal fault path on write faults! */ if ((vmf->flags & FAULT_FLAG_WRITE) && IS_DAX(inode)) - return xfs_filemap_page_mkwrite(vma, vmf); + return xfs_filemap_page_mkwrite(vmf); xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED); if (IS_DAX(inode)) - ret = dax_iomap_fault(vma, vmf, &xfs_iomap_ops); + ret = dax_iomap_fault(vmf, PE_SIZE_PTE, &xfs_iomap_ops); else - ret = filemap_fault(vma, vmf); + ret = filemap_fault(vmf); xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED); return ret; @@ -1431,13 +1429,14 @@ xfs_filemap_fault( /* * Similar to xfs_filemap_fault(), the DAX fault path can call into here on * both read and write faults. Hence we need to handle both cases. There is no - * ->pmd_mkwrite callout for huge pages, so we have a single function here to + * ->huge_mkwrite callout for huge pages, so we have a single function here to * handle both cases here. @flags carries the information on the type of fault * occuring. */ STATIC int -xfs_filemap_pmd_fault( - struct vm_fault *vmf) +xfs_filemap_huge_fault( + struct vm_fault *vmf, + enum page_entry_size pe_size) { struct inode *inode = file_inode(vmf->vma->vm_file); struct xfs_inode *ip = XFS_I(inode); @@ -1446,7 +1445,7 @@ xfs_filemap_pmd_fault( if (!IS_DAX(inode)) return VM_FAULT_FALLBACK; - trace_xfs_filemap_pmd_fault(ip); + trace_xfs_filemap_huge_fault(ip); if (vmf->flags & FAULT_FLAG_WRITE) { sb_start_pagefault(inode->i_sb); @@ -1454,7 +1453,7 @@ xfs_filemap_pmd_fault( } xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED); - ret = dax_iomap_pmd_fault(vmf, &xfs_iomap_ops); + ret = dax_iomap_fault(vmf, pe_size, &xfs_iomap_ops); xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED); if (vmf->flags & FAULT_FLAG_WRITE) @@ -1471,11 +1470,10 @@ xfs_filemap_pmd_fault( */ static int xfs_filemap_pfn_mkwrite( - struct vm_area_struct *vma, struct vm_fault *vmf) { - struct inode *inode = file_inode(vma->vm_file); + struct inode *inode = file_inode(vmf->vma->vm_file); struct xfs_inode *ip = XFS_I(inode); int ret = VM_FAULT_NOPAGE; loff_t size; @@ -1483,7 +1481,7 @@ xfs_filemap_pfn_mkwrite( trace_xfs_filemap_pfn_mkwrite(ip); sb_start_pagefault(inode->i_sb); - file_update_time(vma->vm_file); + file_update_time(vmf->vma->vm_file); /* check if the faulting page hasn't raced with truncate */ xfs_ilock(ip, XFS_MMAPLOCK_SHARED); @@ -1491,7 +1489,7 @@ xfs_filemap_pfn_mkwrite( if (vmf->pgoff >= size) ret = VM_FAULT_SIGBUS; else if (IS_DAX(inode)) - ret = dax_pfn_mkwrite(vma, vmf); + ret = dax_pfn_mkwrite(vmf); xfs_iunlock(ip, XFS_MMAPLOCK_SHARED); sb_end_pagefault(inode->i_sb); return ret; @@ -1500,7 +1498,7 @@ xfs_filemap_pfn_mkwrite( static const struct vm_operations_struct xfs_file_vm_ops = { .fault = xfs_filemap_fault, - .pmd_fault = xfs_filemap_pmd_fault, + .huge_fault = xfs_filemap_huge_fault, .map_pages = filemap_map_pages, .page_mkwrite = xfs_filemap_page_mkwrite, .pfn_mkwrite = xfs_filemap_pfn_mkwrite, diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index fb7555e73a62..383ac227ce2c 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -687,7 +687,7 @@ DEFINE_INODE_EVENT(xfs_inode_clear_cowblocks_tag); DEFINE_INODE_EVENT(xfs_inode_free_cowblocks_invalid); DEFINE_INODE_EVENT(xfs_filemap_fault); -DEFINE_INODE_EVENT(xfs_filemap_pmd_fault); +DEFINE_INODE_EVENT(xfs_filemap_huge_fault); DEFINE_INODE_EVENT(xfs_filemap_page_mkwrite); DEFINE_INODE_EVENT(xfs_filemap_pfn_mkwrite); |