| /* |
| * fs/f2fs/file.c |
| * |
| * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| * http://www.samsung.com/ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #include <linux/fs.h> |
| #include <linux/f2fs_fs.h> |
| #include <linux/stat.h> |
| #include <linux/buffer_head.h> |
| #include <linux/writeback.h> |
| #include <linux/blkdev.h> |
| #include <linux/falloc.h> |
| #include <linux/types.h> |
| #include <linux/compat.h> |
| #include <linux/uaccess.h> |
| #include <linux/mount.h> |
| #include <linux/pagevec.h> |
| #include <linux/random.h> |
| |
| #include "f2fs.h" |
| #include "node.h" |
| #include "segment.h" |
| #include "xattr.h" |
| #include "acl.h" |
| #include "gc.h" |
| #include "trace.h" |
| #include <trace/events/f2fs.h> |
| |
| static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, |
| struct vm_fault *vmf) |
| { |
| struct page *page = vmf->page; |
| struct inode *inode = file_inode(vma->vm_file); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct dnode_of_data dn; |
| int err; |
| |
| sb_start_pagefault(inode->i_sb); |
| |
| f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); |
| |
| /* block allocation */ |
| f2fs_lock_op(sbi); |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| err = f2fs_reserve_block(&dn, page->index); |
| if (err) { |
| f2fs_unlock_op(sbi); |
| goto out; |
| } |
| f2fs_put_dnode(&dn); |
| f2fs_unlock_op(sbi); |
| |
| f2fs_balance_fs(sbi, dn.node_changed); |
| |
| file_update_time(vma->vm_file); |
| lock_page(page); |
| if (unlikely(page->mapping != inode->i_mapping || |
| page_offset(page) > i_size_read(inode) || |
| !PageUptodate(page))) { |
| unlock_page(page); |
| err = -EFAULT; |
| goto out; |
| } |
| |
| /* |
| * check to see if the page is mapped already (no holes) |
| */ |
| if (PageMappedToDisk(page)) |
| goto mapped; |
| |
| /* page is wholly or partially inside EOF */ |
| if (((loff_t)(page->index + 1) << PAGE_SHIFT) > |
| i_size_read(inode)) { |
| unsigned offset; |
| offset = i_size_read(inode) & ~PAGE_MASK; |
| zero_user_segment(page, offset, PAGE_SIZE); |
| } |
| set_page_dirty(page); |
| SetPageUptodate(page); |
| |
| trace_f2fs_vm_page_mkwrite(page, DATA); |
| mapped: |
| /* fill the page */ |
| f2fs_wait_on_page_writeback(page, DATA, false); |
| |
| /* wait for GCed encrypted page writeback */ |
| if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
| f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr); |
| |
| /* if gced page is attached, don't write to cold segment */ |
| clear_cold_data(page); |
| out: |
| sb_end_pagefault(inode->i_sb); |
| f2fs_update_time(sbi, REQ_TIME); |
| return block_page_mkwrite_return(err); |
| } |
| |
| static const struct vm_operations_struct f2fs_file_vm_ops = { |
| .fault = filemap_fault, |
| .map_pages = filemap_map_pages, |
| .page_mkwrite = f2fs_vm_page_mkwrite, |
| }; |
| |
| static int get_parent_ino(struct inode *inode, nid_t *pino) |
| { |
| struct dentry *dentry; |
| |
| inode = igrab(inode); |
| dentry = d_find_any_alias(inode); |
| iput(inode); |
| if (!dentry) |
| return 0; |
| |
| if (update_dent_inode(inode, inode, &dentry->d_name)) { |
| dput(dentry); |
| return 0; |
| } |
| |
| *pino = parent_ino(dentry); |
| dput(dentry); |
| return 1; |
| } |
| |
| static inline bool need_do_checkpoint(struct inode *inode) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| bool need_cp = false; |
| |
| if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
| need_cp = true; |
| else if (file_enc_name(inode) && need_dentry_mark(sbi, inode->i_ino)) |
| need_cp = true; |
| else if (file_wrong_pino(inode)) |
| need_cp = true; |
| else if (!space_for_roll_forward(sbi)) |
| need_cp = true; |
| else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
| need_cp = true; |
| else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) |
| need_cp = true; |
| else if (test_opt(sbi, FASTBOOT)) |
| need_cp = true; |
| else if (sbi->active_logs == 2) |
| need_cp = true; |
| |
| return need_cp; |
| } |
| |
| static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) |
| { |
| struct page *i = find_get_page(NODE_MAPPING(sbi), ino); |
| bool ret = false; |
| /* But we need to avoid that there are some inode updates */ |
| if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) |
| ret = true; |
| f2fs_put_page(i, 0); |
| return ret; |
| } |
| |
| static void try_to_fix_pino(struct inode *inode) |
| { |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| nid_t pino; |
| |
| down_write(&fi->i_sem); |
| fi->xattr_ver = 0; |
| if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
| get_parent_ino(inode, &pino)) { |
| fi->i_pino = pino; |
| file_got_pino(inode); |
| up_write(&fi->i_sem); |
| |
| mark_inode_dirty_sync(inode); |
| f2fs_write_inode(inode, NULL); |
| } else { |
| up_write(&fi->i_sem); |
| } |
| } |
| |
| int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
| { |
| struct inode *inode = file->f_mapping->host; |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| nid_t ino = inode->i_ino; |
| int ret = 0; |
| bool need_cp = false; |
| struct writeback_control wbc = { |
| .sync_mode = WB_SYNC_ALL, |
| .nr_to_write = LONG_MAX, |
| .for_reclaim = 0, |
| }; |
| |
| if (unlikely(f2fs_readonly(inode->i_sb))) |
| return 0; |
| |
| trace_f2fs_sync_file_enter(inode); |
| |
| /* if fdatasync is triggered, let's do in-place-update */ |
| if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) |
| set_inode_flag(fi, FI_NEED_IPU); |
| ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
| clear_inode_flag(fi, FI_NEED_IPU); |
| |
| if (ret) { |
| trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
| return ret; |
| } |
| |
| /* if the inode is dirty, let's recover all the time */ |
| if (!datasync) { |
| f2fs_write_inode(inode, NULL); |
| goto go_write; |
| } |
| |
| /* |
| * if there is no written data, don't waste time to write recovery info. |
| */ |
| if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && |
| !exist_written_data(sbi, ino, APPEND_INO)) { |
| |
| /* it may call write_inode just prior to fsync */ |
| if (need_inode_page_update(sbi, ino)) |
| goto go_write; |
| |
| if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || |
| exist_written_data(sbi, ino, UPDATE_INO)) |
| goto flush_out; |
| goto out; |
| } |
| go_write: |
| /* |
| * Both of fdatasync() and fsync() are able to be recovered from |
| * sudden-power-off. |
| */ |
| down_read(&fi->i_sem); |
| need_cp = need_do_checkpoint(inode); |
| up_read(&fi->i_sem); |
| |
| if (need_cp) { |
| /* all the dirty node pages should be flushed for POR */ |
| ret = f2fs_sync_fs(inode->i_sb, 1); |
| |
| /* |
| * We've secured consistency through sync_fs. Following pino |
| * will be used only for fsynced inodes after checkpoint. |
| */ |
| try_to_fix_pino(inode); |
| clear_inode_flag(fi, FI_APPEND_WRITE); |
| clear_inode_flag(fi, FI_UPDATE_WRITE); |
| goto out; |
| } |
| sync_nodes: |
| sync_node_pages(sbi, ino, &wbc); |
| |
| /* if cp_error was enabled, we should avoid infinite loop */ |
| if (unlikely(f2fs_cp_error(sbi))) { |
| ret = -EIO; |
| goto out; |
| } |
| |
| if (need_inode_block_update(sbi, ino)) { |
| mark_inode_dirty_sync(inode); |
| f2fs_write_inode(inode, NULL); |
| goto sync_nodes; |
| } |
| |
| ret = wait_on_node_pages_writeback(sbi, ino); |
| if (ret) |
| goto out; |
| |
| /* once recovery info is written, don't need to tack this */ |
| remove_ino_entry(sbi, ino, APPEND_INO); |
| clear_inode_flag(fi, FI_APPEND_WRITE); |
| flush_out: |
| remove_ino_entry(sbi, ino, UPDATE_INO); |
| clear_inode_flag(fi, FI_UPDATE_WRITE); |
| ret = f2fs_issue_flush(sbi); |
| f2fs_update_time(sbi, REQ_TIME); |
| out: |
| trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
| f2fs_trace_ios(NULL, 1); |
| return ret; |
| } |
| |
| static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
| pgoff_t pgofs, int whence) |
| { |
| struct pagevec pvec; |
| int nr_pages; |
| |
| if (whence != SEEK_DATA) |
| return 0; |
| |
| /* find first dirty page index */ |
| pagevec_init(&pvec, 0); |
| nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
| PAGECACHE_TAG_DIRTY, 1); |
| pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX; |
| pagevec_release(&pvec); |
| return pgofs; |
| } |
| |
| static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, |
| int whence) |
| { |
| switch (whence) { |
| case SEEK_DATA: |
| if ((blkaddr == NEW_ADDR && dirty == pgofs) || |
| (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) |
| return true; |
| break; |
| case SEEK_HOLE: |
| if (blkaddr == NULL_ADDR) |
| return true; |
| break; |
| } |
| return false; |
| } |
| |
| static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
| { |
| struct inode *inode = file->f_mapping->host; |
| loff_t maxbytes = inode->i_sb->s_maxbytes; |
| struct dnode_of_data dn; |
| pgoff_t pgofs, end_offset, dirty; |
| loff_t data_ofs = offset; |
| loff_t isize; |
| int err = 0; |
| |
| inode_lock(inode); |
| |
| isize = i_size_read(inode); |
| if (offset >= isize) |
| goto fail; |
| |
| /* handle inline data case */ |
| if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { |
| if (whence == SEEK_HOLE) |
| data_ofs = isize; |
| goto found; |
| } |
| |
| pgofs = (pgoff_t)(offset >> PAGE_SHIFT); |
| |
| dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
| |
| for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) { |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); |
| if (err && err != -ENOENT) { |
| goto fail; |
| } else if (err == -ENOENT) { |
| /* direct node does not exists */ |
| if (whence == SEEK_DATA) { |
| pgofs = get_next_page_offset(&dn, pgofs); |
| continue; |
| } else { |
| goto found; |
| } |
| } |
| |
| end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
| |
| /* find data/hole in dnode block */ |
| for (; dn.ofs_in_node < end_offset; |
| dn.ofs_in_node++, pgofs++, |
| data_ofs = (loff_t)pgofs << PAGE_SHIFT) { |
| block_t blkaddr; |
| blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
| |
| if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
| f2fs_put_dnode(&dn); |
| goto found; |
| } |
| } |
| f2fs_put_dnode(&dn); |
| } |
| |
| if (whence == SEEK_DATA) |
| goto fail; |
| found: |
| if (whence == SEEK_HOLE && data_ofs > isize) |
| data_ofs = isize; |
| inode_unlock(inode); |
| return vfs_setpos(file, data_ofs, maxbytes); |
| fail: |
| inode_unlock(inode); |
| return -ENXIO; |
| } |
| |
| static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) |
| { |
| struct inode *inode = file->f_mapping->host; |
| loff_t maxbytes = inode->i_sb->s_maxbytes; |
| |
| switch (whence) { |
| case SEEK_SET: |
| case SEEK_CUR: |
| case SEEK_END: |
| return generic_file_llseek_size(file, offset, whence, |
| maxbytes, i_size_read(inode)); |
| case SEEK_DATA: |
| case SEEK_HOLE: |
| if (offset < 0) |
| return -ENXIO; |
| return f2fs_seek_block(file, offset, whence); |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
| { |
| struct inode *inode = file_inode(file); |
| int err; |
| |
| if (f2fs_encrypted_inode(inode)) { |
| err = fscrypt_get_encryption_info(inode); |
| if (err) |
| return 0; |
| if (!f2fs_encrypted_inode(inode)) |
| return -ENOKEY; |
| } |
| |
| /* we don't need to use inline_data strictly */ |
| err = f2fs_convert_inline_inode(inode); |
| if (err) |
| return err; |
| |
| file_accessed(file); |
| vma->vm_ops = &f2fs_file_vm_ops; |
| return 0; |
| } |
| |
| static int f2fs_file_open(struct inode *inode, struct file *filp) |
| { |
| int ret = generic_file_open(inode, filp); |
| struct inode *dir = filp->f_path.dentry->d_parent->d_inode; |
| |
| if (!ret && f2fs_encrypted_inode(inode)) { |
| ret = fscrypt_get_encryption_info(inode); |
| if (ret) |
| return -EACCES; |
| if (!fscrypt_has_encryption_key(inode)) |
| return -ENOKEY; |
| } |
| if (f2fs_encrypted_inode(dir) && |
| !fscrypt_has_permitted_context(dir, inode)) |
| return -EPERM; |
| return ret; |
| } |
| |
| int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| struct f2fs_node *raw_node; |
| int nr_free = 0, ofs = dn->ofs_in_node, len = count; |
| __le32 *addr; |
| |
| raw_node = F2FS_NODE(dn->node_page); |
| addr = blkaddr_in_node(raw_node) + ofs; |
| |
| for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
| block_t blkaddr = le32_to_cpu(*addr); |
| if (blkaddr == NULL_ADDR) |
| continue; |
| |
| dn->data_blkaddr = NULL_ADDR; |
| set_data_blkaddr(dn); |
| invalidate_blocks(sbi, blkaddr); |
| if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page)) |
| clear_inode_flag(F2FS_I(dn->inode), |
| FI_FIRST_BLOCK_WRITTEN); |
| nr_free++; |
| } |
| |
| if (nr_free) { |
| pgoff_t fofs; |
| /* |
| * once we invalidate valid blkaddr in range [ofs, ofs + count], |
| * we will invalidate all blkaddr in the whole range. |
| */ |
| fofs = start_bidx_of_node(ofs_of_node(dn->node_page), |
| dn->inode) + ofs; |
| f2fs_update_extent_cache_range(dn, fofs, 0, len); |
| dec_valid_block_count(sbi, dn->inode, nr_free); |
| sync_inode_page(dn); |
| } |
| dn->ofs_in_node = ofs; |
| |
| f2fs_update_time(sbi, REQ_TIME); |
| trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, |
| dn->ofs_in_node, nr_free); |
| return nr_free; |
| } |
| |
| void truncate_data_blocks(struct dnode_of_data *dn) |
| { |
| truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); |
| } |
| |
| static int truncate_partial_data_page(struct inode *inode, u64 from, |
| bool cache_only) |
| { |
| unsigned offset = from & (PAGE_SIZE - 1); |
| pgoff_t index = from >> PAGE_SHIFT; |
| struct address_space *mapping = inode->i_mapping; |
| struct page *page; |
| |
| if (!offset && !cache_only) |
| return 0; |
| |
| if (cache_only) { |
| page = f2fs_grab_cache_page(mapping, index, false); |
| if (page && PageUptodate(page)) |
| goto truncate_out; |
| f2fs_put_page(page, 1); |
| return 0; |
| } |
| |
| page = get_lock_data_page(inode, index, true); |
| if (IS_ERR(page)) |
| return 0; |
| truncate_out: |
| f2fs_wait_on_page_writeback(page, DATA, true); |
| zero_user(page, offset, PAGE_SIZE - offset); |
| if (!cache_only || !f2fs_encrypted_inode(inode) || |
| !S_ISREG(inode->i_mode)) |
| set_page_dirty(page); |
| f2fs_put_page(page, 1); |
| return 0; |
| } |
| |
| int truncate_blocks(struct inode *inode, u64 from, bool lock) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| unsigned int blocksize = inode->i_sb->s_blocksize; |
| struct dnode_of_data dn; |
| pgoff_t free_from; |
| int count = 0, err = 0; |
| struct page *ipage; |
| bool truncate_page = false; |
| |
| trace_f2fs_truncate_blocks_enter(inode, from); |
| |
| free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1); |
| |
| if (lock) |
| f2fs_lock_op(sbi); |
| |
| ipage = get_node_page(sbi, inode->i_ino); |
| if (IS_ERR(ipage)) { |
| err = PTR_ERR(ipage); |
| goto out; |
| } |
| |
| if (f2fs_has_inline_data(inode)) { |
| if (truncate_inline_inode(ipage, from)) |
| set_page_dirty(ipage); |
| f2fs_put_page(ipage, 1); |
| truncate_page = true; |
| goto out; |
| } |
| |
| set_new_dnode(&dn, inode, ipage, NULL, 0); |
| err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
| if (err) { |
| if (err == -ENOENT) |
| goto free_next; |
| goto out; |
| } |
| |
| count = ADDRS_PER_PAGE(dn.node_page, inode); |
| |
| count -= dn.ofs_in_node; |
| f2fs_bug_on(sbi, count < 0); |
| |
| if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
| truncate_data_blocks_range(&dn, count); |
| free_from += count; |
| } |
| |
| f2fs_put_dnode(&dn); |
| free_next: |
| err = truncate_inode_blocks(inode, free_from); |
| out: |
| if (lock) |
| f2fs_unlock_op(sbi); |
| |
| /* lastly zero out the first data page */ |
| if (!err) |
| err = truncate_partial_data_page(inode, from, truncate_page); |
| |
| trace_f2fs_truncate_blocks_exit(inode, err); |
| return err; |
| } |
| |
| int f2fs_truncate(struct inode *inode, bool lock) |
| { |
| int err; |
| |
| if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| S_ISLNK(inode->i_mode))) |
| return 0; |
| |
| trace_f2fs_truncate(inode); |
| |
| /* we should check inline_data size */ |
| if (!f2fs_may_inline_data(inode)) { |
| err = f2fs_convert_inline_inode(inode); |
| if (err) |
| return err; |
| } |
| |
| err = truncate_blocks(inode, i_size_read(inode), lock); |
| if (err) |
| return err; |
| |
| inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| mark_inode_dirty(inode); |
| return 0; |
| } |
| |
| int f2fs_getattr(struct vfsmount *mnt, |
| struct dentry *dentry, struct kstat *stat) |
| { |
| struct inode *inode = d_inode(dentry); |
| generic_fillattr(inode, stat); |
| stat->blocks <<= 3; |
| return 0; |
| } |
| |
| #ifdef CONFIG_F2FS_FS_POSIX_ACL |
| static void __setattr_copy(struct inode *inode, const struct iattr *attr) |
| { |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| unsigned int ia_valid = attr->ia_valid; |
| |
| if (ia_valid & ATTR_UID) |
| inode->i_uid = attr->ia_uid; |
| if (ia_valid & ATTR_GID) |
| inode->i_gid = attr->ia_gid; |
| if (ia_valid & ATTR_ATIME) |
| inode->i_atime = timespec_trunc(attr->ia_atime, |
| inode->i_sb->s_time_gran); |
| if (ia_valid & ATTR_MTIME) |
| inode->i_mtime = timespec_trunc(attr->ia_mtime, |
| inode->i_sb->s_time_gran); |
| if (ia_valid & ATTR_CTIME) |
| inode->i_ctime = timespec_trunc(attr->ia_ctime, |
| inode->i_sb->s_time_gran); |
| if (ia_valid & ATTR_MODE) { |
| umode_t mode = attr->ia_mode; |
| |
| if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) |
| mode &= ~S_ISGID; |
| set_acl_inode(fi, mode); |
| } |
| } |
| #else |
| #define __setattr_copy setattr_copy |
| #endif |
| |
| int f2fs_setattr(struct dentry *dentry, struct iattr *attr) |
| { |
| struct inode *inode = d_inode(dentry); |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| int err; |
| |
| err = inode_change_ok(inode, attr); |
| if (err) |
| return err; |
| |
| if (attr->ia_valid & ATTR_SIZE) { |
| if (f2fs_encrypted_inode(inode) && |
| fscrypt_get_encryption_info(inode)) |
| return -EACCES; |
| |
| if (attr->ia_size <= i_size_read(inode)) { |
| truncate_setsize(inode, attr->ia_size); |
| err = f2fs_truncate(inode, true); |
| if (err) |
| return err; |
| f2fs_balance_fs(F2FS_I_SB(inode), true); |
| } else { |
| /* |
| * do not trim all blocks after i_size if target size is |
| * larger than i_size. |
| */ |
| truncate_setsize(inode, attr->ia_size); |
| |
| /* should convert inline inode here */ |
| if (!f2fs_may_inline_data(inode)) { |
| err = f2fs_convert_inline_inode(inode); |
| if (err) |
| return err; |
| } |
| inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| } |
| } |
| |
| __setattr_copy(inode, attr); |
| |
| if (attr->ia_valid & ATTR_MODE) { |
| err = posix_acl_chmod(inode, get_inode_mode(inode)); |
| if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
| inode->i_mode = fi->i_acl_mode; |
| clear_inode_flag(fi, FI_ACL_MODE); |
| } |
| } |
| |
| mark_inode_dirty(inode); |
| return err; |
| } |
| |
| const struct inode_operations f2fs_file_inode_operations = { |
| .getattr = f2fs_getattr, |
| .setattr = f2fs_setattr, |
| .get_acl = f2fs_get_acl, |
| .set_acl = f2fs_set_acl, |
| #ifdef CONFIG_F2FS_FS_XATTR |
| .setxattr = generic_setxattr, |
| .getxattr = generic_getxattr, |
| .listxattr = f2fs_listxattr, |
| .removexattr = generic_removexattr, |
| #endif |
| .fiemap = f2fs_fiemap, |
| }; |
| |
| static int fill_zero(struct inode *inode, pgoff_t index, |
| loff_t start, loff_t len) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct page *page; |
| |
| if (!len) |
| return 0; |
| |
| f2fs_balance_fs(sbi, true); |
| |
| f2fs_lock_op(sbi); |
| page = get_new_data_page(inode, NULL, index, false); |
| f2fs_unlock_op(sbi); |
| |
| if (IS_ERR(page)) |
| return PTR_ERR(page); |
| |
| f2fs_wait_on_page_writeback(page, DATA, true); |
| zero_user(page, start, len); |
| set_page_dirty(page); |
| f2fs_put_page(page, 1); |
| return 0; |
| } |
| |
| int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) |
| { |
| int err; |
| |
| while (pg_start < pg_end) { |
| struct dnode_of_data dn; |
| pgoff_t end_offset, count; |
| |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE); |
| if (err) { |
| if (err == -ENOENT) { |
| pg_start++; |
| continue; |
| } |
| return err; |
| } |
| |
| end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
| count = min(end_offset - dn.ofs_in_node, pg_end - pg_start); |
| |
| f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset); |
| |
| truncate_data_blocks_range(&dn, count); |
| f2fs_put_dnode(&dn); |
| |
| pg_start += count; |
| } |
| return 0; |
| } |
| |
| static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
| { |
| pgoff_t pg_start, pg_end; |
| loff_t off_start, off_end; |
| int ret; |
| |
| ret = f2fs_convert_inline_inode(inode); |
| if (ret) |
| return ret; |
| |
| pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; |
| pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; |
| |
| off_start = offset & (PAGE_SIZE - 1); |
| off_end = (offset + len) & (PAGE_SIZE - 1); |
| |
| if (pg_start == pg_end) { |
| ret = fill_zero(inode, pg_start, off_start, |
| off_end - off_start); |
| if (ret) |
| return ret; |
| } else { |
| if (off_start) { |
| ret = fill_zero(inode, pg_start++, off_start, |
| PAGE_SIZE - off_start); |
| if (ret) |
| return ret; |
| } |
| if (off_end) { |
| ret = fill_zero(inode, pg_end, 0, off_end); |
| if (ret) |
| return ret; |
| } |
| |
| if (pg_start < pg_end) { |
| struct address_space *mapping = inode->i_mapping; |
| loff_t blk_start, blk_end; |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| |
| f2fs_balance_fs(sbi, true); |
| |
| blk_start = (loff_t)pg_start << PAGE_SHIFT; |
| blk_end = (loff_t)pg_end << PAGE_SHIFT; |
| truncate_inode_pages_range(mapping, blk_start, |
| blk_end - 1); |
| |
| f2fs_lock_op(sbi); |
| ret = truncate_hole(inode, pg_start, pg_end); |
| f2fs_unlock_op(sbi); |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int __exchange_data_block(struct inode *inode, pgoff_t src, |
| pgoff_t dst, bool full) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct dnode_of_data dn; |
| block_t new_addr; |
| bool do_replace = false; |
| int ret; |
| |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| ret = get_dnode_of_data(&dn, src, LOOKUP_NODE_RA); |
| if (ret && ret != -ENOENT) { |
| return ret; |
| } else if (ret == -ENOENT) { |
| new_addr = NULL_ADDR; |
| } else { |
| new_addr = dn.data_blkaddr; |
| if (!is_checkpointed_data(sbi, new_addr)) { |
| /* do not invalidate this block address */ |
| f2fs_update_data_blkaddr(&dn, NULL_ADDR); |
| do_replace = true; |
| } |
| f2fs_put_dnode(&dn); |
| } |
| |
| if (new_addr == NULL_ADDR) |
| return full ? truncate_hole(inode, dst, dst + 1) : 0; |
| |
| if (do_replace) { |
| struct page *ipage = get_node_page(sbi, inode->i_ino); |
| struct node_info ni; |
| |
| if (IS_ERR(ipage)) { |
| ret = PTR_ERR(ipage); |
| goto err_out; |
| } |
| |
| set_new_dnode(&dn, inode, ipage, NULL, 0); |
| ret = f2fs_reserve_block(&dn, dst); |
| if (ret) |
| goto err_out; |
| |
| truncate_data_blocks_range(&dn, 1); |
| |
| get_node_info(sbi, dn.nid, &ni); |
| f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr, |
| ni.version, true, false); |
| f2fs_put_dnode(&dn); |
| } else { |
| struct page *psrc, *pdst; |
| |
| psrc = get_lock_data_page(inode, src, true); |
| if (IS_ERR(psrc)) |
| return PTR_ERR(psrc); |
| pdst = get_new_data_page(inode, NULL, dst, true); |
| if (IS_ERR(pdst)) { |
| f2fs_put_page(psrc, 1); |
| return PTR_ERR(pdst); |
| } |
| f2fs_copy_page(psrc, pdst); |
| set_page_dirty(pdst); |
| f2fs_put_page(pdst, 1); |
| f2fs_put_page(psrc, 1); |
| |
| return truncate_hole(inode, src, src + 1); |
| } |
| return 0; |
| |
| err_out: |
| if (!get_dnode_of_data(&dn, src, LOOKUP_NODE)) { |
| f2fs_update_data_blkaddr(&dn, new_addr); |
| f2fs_put_dnode(&dn); |
| } |
| return ret; |
| } |
| |
| static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; |
| int ret = 0; |
| |
| for (; end < nrpages; start++, end++) { |
| f2fs_balance_fs(sbi, true); |
| f2fs_lock_op(sbi); |
| ret = __exchange_data_block(inode, end, start, true); |
| f2fs_unlock_op(sbi); |
| if (ret) |
| break; |
| } |
| return ret; |
| } |
| |
| static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) |
| { |
| pgoff_t pg_start, pg_end; |
| loff_t new_size; |
| int ret; |
| |
| if (offset + len >= i_size_read(inode)) |
| return -EINVAL; |
| |
| /* collapse range should be aligned to block size of f2fs. */ |
| if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) |
| return -EINVAL; |
| |
| ret = f2fs_convert_inline_inode(inode); |
| if (ret) |
| return ret; |
| |
| pg_start = offset >> PAGE_SHIFT; |
| pg_end = (offset + len) >> PAGE_SHIFT; |
| |
| /* write out all dirty pages from offset */ |
| ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| if (ret) |
| return ret; |
| |
| truncate_pagecache(inode, offset); |
| |
| ret = f2fs_do_collapse(inode, pg_start, pg_end); |
| if (ret) |
| return ret; |
| |
| /* write out all moved pages, if possible */ |
| filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| truncate_pagecache(inode, offset); |
| |
| new_size = i_size_read(inode) - len; |
| truncate_pagecache(inode, new_size); |
| |
| ret = truncate_blocks(inode, new_size, true); |
| if (!ret) |
| i_size_write(inode, new_size); |
| |
| return ret; |
| } |
| |
| static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, |
| int mode) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct address_space *mapping = inode->i_mapping; |
| pgoff_t index, pg_start, pg_end; |
| loff_t new_size = i_size_read(inode); |
| loff_t off_start, off_end; |
| int ret = 0; |
| |
| ret = inode_newsize_ok(inode, (len + offset)); |
| if (ret) |
| return ret; |
| |
| ret = f2fs_convert_inline_inode(inode); |
| if (ret) |
| return ret; |
| |
| ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1); |
| if (ret) |
| return ret; |
| |
| truncate_pagecache_range(inode, offset, offset + len - 1); |
| |
| pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; |
| pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; |
| |
| off_start = offset & (PAGE_SIZE - 1); |
| off_end = (offset + len) & (PAGE_SIZE - 1); |
| |
| if (pg_start == pg_end) { |
| ret = fill_zero(inode, pg_start, off_start, |
| off_end - off_start); |
| if (ret) |
| return ret; |
| |
| if (offset + len > new_size) |
| new_size = offset + len; |
| new_size = max_t(loff_t, new_size, offset + len); |
| } else { |
| if (off_start) { |
| ret = fill_zero(inode, pg_start++, off_start, |
| PAGE_SIZE - off_start); |
| if (ret) |
| return ret; |
| |
| new_size = max_t(loff_t, new_size, |
| (loff_t)pg_start << PAGE_SHIFT); |
| } |
| |
| for (index = pg_start; index < pg_end; index++) { |
| struct dnode_of_data dn; |
| struct page *ipage; |
| |
| f2fs_lock_op(sbi); |
| |
| ipage = get_node_page(sbi, inode->i_ino); |
| if (IS_ERR(ipage)) { |
| ret = PTR_ERR(ipage); |
| f2fs_unlock_op(sbi); |
| goto out; |
| } |
| |
| set_new_dnode(&dn, inode, ipage, NULL, 0); |
| ret = f2fs_reserve_block(&dn, index); |
| if (ret) { |
| f2fs_unlock_op(sbi); |
| goto out; |
| } |
| |
| if (dn.data_blkaddr != NEW_ADDR) { |
| invalidate_blocks(sbi, dn.data_blkaddr); |
| f2fs_update_data_blkaddr(&dn, NEW_ADDR); |
| } |
| f2fs_put_dnode(&dn); |
| f2fs_unlock_op(sbi); |
| |
| new_size = max_t(loff_t, new_size, |
| (loff_t)(index + 1) << PAGE_SHIFT); |
| } |
| |
| if (off_end) { |
| ret = fill_zero(inode, pg_end, 0, off_end); |
| if (ret) |
| goto out; |
| |
| new_size = max_t(loff_t, new_size, offset + len); |
| } |
| } |
| |
| out: |
| if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) { |
| i_size_write(inode, new_size); |
| mark_inode_dirty(inode); |
| update_inode_page(inode); |
| } |
| |
| return ret; |
| } |
| |
| static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| pgoff_t pg_start, pg_end, delta, nrpages, idx; |
| loff_t new_size; |
| int ret = 0; |
| |
| new_size = i_size_read(inode) + len; |
| if (new_size > inode->i_sb->s_maxbytes) |
| return -EFBIG; |
| |
| if (offset >= i_size_read(inode)) |
| return -EINVAL; |
| |
| /* insert range should be aligned to block size of f2fs. */ |
| if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) |
| return -EINVAL; |
| |
| ret = f2fs_convert_inline_inode(inode); |
| if (ret) |
| return ret; |
| |
| f2fs_balance_fs(sbi, true); |
| |
| ret = truncate_blocks(inode, i_size_read(inode), true); |
| if (ret) |
| return ret; |
| |
| /* write out all dirty pages from offset */ |
| ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| if (ret) |
| return ret; |
| |
| truncate_pagecache(inode, offset); |
| |
| pg_start = offset >> PAGE_SHIFT; |
| pg_end = (offset + len) >> PAGE_SHIFT; |
| delta = pg_end - pg_start; |
| nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; |
| |
| for (idx = nrpages - 1; idx >= pg_start && idx != -1; idx--) { |
| f2fs_lock_op(sbi); |
| ret = __exchange_data_block(inode, idx, idx + delta, false); |
| f2fs_unlock_op(sbi); |
| if (ret) |
| break; |
| } |
| |
| /* write out all moved pages, if possible */ |
| filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| truncate_pagecache(inode, offset); |
| |
| if (!ret) |
| i_size_write(inode, new_size); |
| return ret; |
| } |
| |
| static int expand_inode_data(struct inode *inode, loff_t offset, |
| loff_t len, int mode) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| pgoff_t index, pg_start, pg_end; |
| loff_t new_size = i_size_read(inode); |
| loff_t off_start, off_end; |
| int ret = 0; |
| |
| ret = inode_newsize_ok(inode, (len + offset)); |
| if (ret) |
| return ret; |
| |
| ret = f2fs_convert_inline_inode(inode); |
| if (ret) |
| return ret; |
| |
| f2fs_balance_fs(sbi, true); |
| |
| pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; |
| pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; |
| |
| off_start = offset & (PAGE_SIZE - 1); |
| off_end = (offset + len) & (PAGE_SIZE - 1); |
| |
| f2fs_lock_op(sbi); |
| |
| for (index = pg_start; index <= pg_end; index++) { |
| struct dnode_of_data dn; |
| |
| if (index == pg_end && !off_end) |
| goto noalloc; |
| |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| ret = f2fs_reserve_block(&dn, index); |
| if (ret) |
| break; |
| noalloc: |
| if (pg_start == pg_end) |
| new_size = offset + len; |
| else if (index == pg_start && off_start) |
| new_size = (loff_t)(index + 1) << PAGE_SHIFT; |
| else if (index == pg_end) |
| new_size = ((loff_t)index << PAGE_SHIFT) + |
| off_end; |
| else |
| new_size += PAGE_SIZE; |
| } |
| |
| if (!(mode & FALLOC_FL_KEEP_SIZE) && |
| i_size_read(inode) < new_size) { |
| i_size_write(inode, new_size); |
| mark_inode_dirty(inode); |
| update_inode_page(inode); |
| } |
| f2fs_unlock_op(sbi); |
| |
| return ret; |
| } |
| |
| static long f2fs_fallocate(struct file *file, int mode, |
| loff_t offset, loff_t len) |
| { |
| struct inode *inode = file_inode(file); |
| long ret = 0; |
| |
| /* f2fs only support ->fallocate for regular file */ |
| if (!S_ISREG(inode->i_mode)) |
| return -EINVAL; |
| |
| if (f2fs_encrypted_inode(inode) && |
| (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) |
| return -EOPNOTSUPP; |
| |
| if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | |
| FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | |
| FALLOC_FL_INSERT_RANGE)) |
| return -EOPNOTSUPP; |
| |
| inode_lock(inode); |
| |
| if (mode & FALLOC_FL_PUNCH_HOLE) { |
| if (offset >= inode->i_size) |
| goto out; |
| |
| ret = punch_hole(inode, offset, len); |
| } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
| ret = f2fs_collapse_range(inode, offset, len); |
| } else if (mode & FALLOC_FL_ZERO_RANGE) { |
| ret = f2fs_zero_range(inode, offset, len, mode); |
| } else if (mode & FALLOC_FL_INSERT_RANGE) { |
| ret = f2fs_insert_range(inode, offset, len); |
| } else { |
| ret = expand_inode_data(inode, offset, len, mode); |
| } |
| |
| if (!ret) { |
| inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| mark_inode_dirty(inode); |
| f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| } |
| |
| out: |
| inode_unlock(inode); |
| |
| trace_f2fs_fallocate(inode, mode, offset, len, ret); |
| return ret; |
| } |
| |
| static int f2fs_release_file(struct inode *inode, struct file *filp) |
| { |
| /* some remained atomic pages should discarded */ |
| if (f2fs_is_atomic_file(inode)) |
| drop_inmem_pages(inode); |
| if (f2fs_is_volatile_file(inode)) { |
| set_inode_flag(F2FS_I(inode), FI_DROP_CACHE); |
| filemap_fdatawrite(inode->i_mapping); |
| clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE); |
| } |
| return 0; |
| } |
| |
| #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) |
| #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) |
| |
| static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) |
| { |
| if (S_ISDIR(mode)) |
| return flags; |
| else if (S_ISREG(mode)) |
| return flags & F2FS_REG_FLMASK; |
| else |
| return flags & F2FS_OTHER_FLMASK; |
| } |
| |
| static int f2fs_ioc_getflags(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
| return put_user(flags, (int __user *)arg); |
| } |
| |
| static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
| unsigned int oldflags; |
| int ret; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| if (!inode_owner_or_capable(inode)) { |
| ret = -EACCES; |
| goto out; |
| } |
| |
| if (get_user(flags, (int __user *)arg)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| flags = f2fs_mask_flags(inode->i_mode, flags); |
| |
| inode_lock(inode); |
| |
| oldflags = fi->i_flags; |
| |
| if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { |
| if (!capable(CAP_LINUX_IMMUTABLE)) { |
| inode_unlock(inode); |
| ret = -EPERM; |
| goto out; |
| } |
| } |
| |
| flags = flags & FS_FL_USER_MODIFIABLE; |
| flags |= oldflags & ~FS_FL_USER_MODIFIABLE; |
| fi->i_flags = flags; |
| inode_unlock(inode); |
| |
| f2fs_set_inode_flags(inode); |
| inode->i_ctime = CURRENT_TIME; |
| mark_inode_dirty(inode); |
| out: |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| |
| return put_user(inode->i_generation, (int __user *)arg); |
| } |
| |
| static int f2fs_ioc_start_atomic_write(struct file *filp) |
| { |
| struct inode *inode = file_inode(filp); |
| int ret; |
| |
| if (!inode_owner_or_capable(inode)) |
| return -EACCES; |
| |
| if (f2fs_is_atomic_file(inode)) |
| return 0; |
| |
| ret = f2fs_convert_inline_inode(inode); |
| if (ret) |
| return ret; |
| |
| set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
| f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| |
| return 0; |
| } |
| |
| static int f2fs_ioc_commit_atomic_write(struct file *filp) |
| { |
| struct inode *inode = file_inode(filp); |
| int ret; |
| |
| if (!inode_owner_or_capable(inode)) |
| return -EACCES; |
| |
| if (f2fs_is_volatile_file(inode)) |
| return 0; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| if (f2fs_is_atomic_file(inode)) { |
| clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
| ret = commit_inmem_pages(inode); |
| if (ret) { |
| set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
| goto err_out; |
| } |
| } |
| |
| ret = f2fs_sync_file(filp, 0, LLONG_MAX, 0); |
| err_out: |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| static int f2fs_ioc_start_volatile_write(struct file *filp) |
| { |
| struct inode *inode = file_inode(filp); |
| int ret; |
| |
| if (!inode_owner_or_capable(inode)) |
| return -EACCES; |
| |
| if (f2fs_is_volatile_file(inode)) |
| return 0; |
| |
| ret = f2fs_convert_inline_inode(inode); |
| if (ret) |
| return ret; |
| |
| set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
| f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| return 0; |
| } |
| |
| static int f2fs_ioc_release_volatile_write(struct file *filp) |
| { |
| struct inode *inode = file_inode(filp); |
| |
| if (!inode_owner_or_capable(inode)) |
| return -EACCES; |
| |
| if (!f2fs_is_volatile_file(inode)) |
| return 0; |
| |
| if (!f2fs_is_first_block_written(inode)) |
| return truncate_partial_data_page(inode, 0, true); |
| |
| return punch_hole(inode, 0, F2FS_BLKSIZE); |
| } |
| |
| static int f2fs_ioc_abort_volatile_write(struct file *filp) |
| { |
| struct inode *inode = file_inode(filp); |
| int ret; |
| |
| if (!inode_owner_or_capable(inode)) |
| return -EACCES; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| if (f2fs_is_atomic_file(inode)) { |
| clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
| drop_inmem_pages(inode); |
| } |
| if (f2fs_is_volatile_file(inode)) { |
| clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
| ret = f2fs_sync_file(filp, 0, LLONG_MAX, 0); |
| } |
| |
| mnt_drop_write_file(filp); |
| f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| return ret; |
| } |
| |
| static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct super_block *sb = sbi->sb; |
| __u32 in; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (get_user(in, (__u32 __user *)arg)) |
| return -EFAULT; |
| |
| switch (in) { |
| case F2FS_GOING_DOWN_FULLSYNC: |
| sb = freeze_bdev(sb->s_bdev); |
| if (sb && !IS_ERR(sb)) { |
| f2fs_stop_checkpoint(sbi); |
| thaw_bdev(sb->s_bdev, sb); |
| } |
| break; |
| case F2FS_GOING_DOWN_METASYNC: |
| /* do checkpoint only */ |
| f2fs_sync_fs(sb, 1); |
| f2fs_stop_checkpoint(sbi); |
| break; |
| case F2FS_GOING_DOWN_NOSYNC: |
| f2fs_stop_checkpoint(sbi); |
| break; |
| case F2FS_GOING_DOWN_METAFLUSH: |
| sync_meta_pages(sbi, META, LONG_MAX); |
| f2fs_stop_checkpoint(sbi); |
| break; |
| default: |
| return -EINVAL; |
| } |
| f2fs_update_time(sbi, REQ_TIME); |
| return 0; |
| } |
| |
| static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct super_block *sb = inode->i_sb; |
| struct request_queue *q = bdev_get_queue(sb->s_bdev); |
| struct fstrim_range range; |
| int ret; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (!blk_queue_discard(q)) |
| return -EOPNOTSUPP; |
| |
| if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
| sizeof(range))) |
| return -EFAULT; |
| |
| range.minlen = max((unsigned int)range.minlen, |
| q->limits.discard_granularity); |
| ret = f2fs_trim_fs(F2FS_SB(sb), &range); |
| if (ret < 0) |
| return ret; |
| |
| if (copy_to_user((struct fstrim_range __user *)arg, &range, |
| sizeof(range))) |
| return -EFAULT; |
| f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| return 0; |
| } |
| |
| static bool uuid_is_nonzero(__u8 u[16]) |
| { |
| int i; |
| |
| for (i = 0; i < 16; i++) |
| if (u[i]) |
| return true; |
| return false; |
| } |
| |
| static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg) |
| { |
| struct fscrypt_policy policy; |
| struct inode *inode = file_inode(filp); |
| |
| if (copy_from_user(&policy, (struct fscrypt_policy __user *)arg, |
| sizeof(policy))) |
| return -EFAULT; |
| |
| f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| return fscrypt_process_policy(inode, &policy); |
| } |
| |
| static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) |
| { |
| struct fscrypt_policy policy; |
| struct inode *inode = file_inode(filp); |
| int err; |
| |
| err = fscrypt_get_policy(inode, &policy); |
| if (err) |
| return err; |
| |
| if (copy_to_user((struct fscrypt_policy __user *)arg, &policy, sizeof(policy))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| int err; |
| |
| if (!f2fs_sb_has_crypto(inode->i_sb)) |
| return -EOPNOTSUPP; |
| |
| if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt)) |
| goto got_it; |
| |
| err = mnt_want_write_file(filp); |
| if (err) |
| return err; |
| |
| /* update superblock with uuid */ |
| generate_random_uuid(sbi->raw_super->encrypt_pw_salt); |
| |
| err = f2fs_commit_super(sbi, false); |
| if (err) { |
| /* undo new data */ |
| memset(sbi->raw_super->encrypt_pw_salt, 0, 16); |
| mnt_drop_write_file(filp); |
| return err; |
| } |
| mnt_drop_write_file(filp); |
| got_it: |
| if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt, |
| 16)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int f2fs_ioc_gc(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| __u32 sync; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (get_user(sync, (__u32 __user *)arg)) |
| return -EFAULT; |
| |
| if (f2fs_readonly(sbi->sb)) |
| return -EROFS; |
| |
| if (!sync) { |
| if (!mutex_trylock(&sbi->gc_mutex)) |
| return -EBUSY; |
| } else { |
| mutex_lock(&sbi->gc_mutex); |
| } |
| |
| return f2fs_gc(sbi, sync); |
| } |
| |
| static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (f2fs_readonly(sbi->sb)) |
| return -EROFS; |
| |
| return f2fs_sync_fs(sbi->sb, 1); |
| } |
| |
| static int f2fs_defragment_range(struct f2fs_sb_info *sbi, |
| struct file *filp, |
| struct f2fs_defragment *range) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_map_blocks map = { .m_next_pgofs = NULL }; |
| struct extent_info ei; |
| pgoff_t pg_start, pg_end; |
| unsigned int blk_per_seg = sbi->blocks_per_seg; |
| unsigned int total = 0, sec_num; |
| unsigned int pages_per_sec = sbi->segs_per_sec * blk_per_seg; |
| block_t blk_end = 0; |
| bool fragmented = false; |
| int err; |
| |
| /* if in-place-update policy is enabled, don't waste time here */ |
| if (need_inplace_update(inode)) |
| return -EINVAL; |
| |
| pg_start = range->start >> PAGE_SHIFT; |
| pg_end = (range->start + range->len) >> PAGE_SHIFT; |
| |
| f2fs_balance_fs(sbi, true); |
| |
| inode_lock(inode); |
| |
| /* writeback all dirty pages in the range */ |
| err = filemap_write_and_wait_range(inode->i_mapping, range->start, |
| range->start + range->len - 1); |
| if (err) |
| goto out; |
| |
| /* |
| * lookup mapping info in extent cache, skip defragmenting if physical |
| * block addresses are continuous. |
| */ |
| if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) { |
| if (ei.fofs + ei.len >= pg_end) |
| goto out; |
| } |
| |
| map.m_lblk = pg_start; |
| |
| /* |
| * lookup mapping info in dnode page cache, skip defragmenting if all |
| * physical block addresses are continuous even if there are hole(s) |
| * in logical blocks. |
| */ |
| while (map.m_lblk < pg_end) { |
| map.m_len = pg_end - map.m_lblk; |
| err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ); |
| if (err) |
| goto out; |
| |
| if (!(map.m_flags & F2FS_MAP_FLAGS)) { |
| map.m_lblk++; |
| continue; |
| } |
| |
| if (blk_end && blk_end != map.m_pblk) { |
| fragmented = true; |
| break; |
| } |
| blk_end = map.m_pblk + map.m_len; |
| |
| map.m_lblk += map.m_len; |
| } |
| |
| if (!fragmented) |
| goto out; |
| |
| map.m_lblk = pg_start; |
| map.m_len = pg_end - pg_start; |
| |
| sec_num = (map.m_len + pages_per_sec - 1) / pages_per_sec; |
| |
| /* |
| * make sure there are enough free section for LFS allocation, this can |
| * avoid defragment running in SSR mode when free section are allocated |
| * intensively |
| */ |
| if (has_not_enough_free_secs(sbi, sec_num)) { |
| err = -EAGAIN; |
| goto out; |
| } |
| |
| while (map.m_lblk < pg_end) { |
| pgoff_t idx; |
| int cnt = 0; |
| |
| do_map: |
| map.m_len = pg_end - map.m_lblk; |
| err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ); |
| if (err) |
| goto clear_out; |
| |
| if (!(map.m_flags & F2FS_MAP_FLAGS)) { |
| map.m_lblk++; |
| continue; |
| } |
| |
| set_inode_flag(F2FS_I(inode), FI_DO_DEFRAG); |
| |
| idx = map.m_lblk; |
| while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) { |
| struct page *page; |
| |
| page = get_lock_data_page(inode, idx, true); |
| if (IS_ERR(page)) { |
| err = PTR_ERR(page); |
| goto clear_out; |
| } |
| |
| set_page_dirty(page); |
| f2fs_put_page(page, 1); |
| |
| idx++; |
| cnt++; |
| total++; |
| } |
| |
| map.m_lblk = idx; |
| |
| if (idx < pg_end && cnt < blk_per_seg) |
| goto do_map; |
| |
| clear_inode_flag(F2FS_I(inode), FI_DO_DEFRAG); |
| |
| err = filemap_fdatawrite(inode->i_mapping); |
| if (err) |
| goto out; |
| } |
| clear_out: |
| clear_inode_flag(F2FS_I(inode), FI_DO_DEFRAG); |
| out: |
| inode_unlock(inode); |
| if (!err) |
| range->len = (u64)total << PAGE_SHIFT; |
| return err; |
| } |
| |
| static int f2fs_ioc_defragment(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct f2fs_defragment range; |
| int err; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (!S_ISREG(inode->i_mode)) |
| return -EINVAL; |
| |
| err = mnt_want_write_file(filp); |
| if (err) |
| return err; |
| |
| if (f2fs_readonly(sbi->sb)) { |
| err = -EROFS; |
| goto out; |
| } |
| |
| if (copy_from_user(&range, (struct f2fs_defragment __user *)arg, |
| sizeof(range))) { |
| err = -EFAULT; |
| goto out; |
| } |
| |
| /* verify alignment of offset & size */ |
| if (range.start & (F2FS_BLKSIZE - 1) || |
| range.len & (F2FS_BLKSIZE - 1)) { |
| err = -EINVAL; |
| goto out; |
| } |
| |
| err = f2fs_defragment_range(sbi, filp, &range); |
| f2fs_update_time(sbi, REQ_TIME); |
| if (err < 0) |
| goto out; |
| |
| if (copy_to_user((struct f2fs_defragment __user *)arg, &range, |
| sizeof(range))) |
| err = -EFAULT; |
| out: |
| mnt_drop_write_file(filp); |
| return err; |
| } |
| |
| long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| { |
| switch (cmd) { |
| case F2FS_IOC_GETFLAGS: |
| return f2fs_ioc_getflags(filp, arg); |
| case F2FS_IOC_SETFLAGS: |
| return f2fs_ioc_setflags(filp, arg); |
| case F2FS_IOC_GETVERSION: |
| return f2fs_ioc_getversion(filp, arg); |
| case F2FS_IOC_START_ATOMIC_WRITE: |
| return f2fs_ioc_start_atomic_write(filp); |
| case F2FS_IOC_COMMIT_ATOMIC_WRITE: |
| return f2fs_ioc_commit_atomic_write(filp); |
| case F2FS_IOC_START_VOLATILE_WRITE: |
| return f2fs_ioc_start_volatile_write(filp); |
| case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
| return f2fs_ioc_release_volatile_write(filp); |
| case F2FS_IOC_ABORT_VOLATILE_WRITE: |
| return f2fs_ioc_abort_volatile_write(filp); |
| case F2FS_IOC_SHUTDOWN: |
| return f2fs_ioc_shutdown(filp, arg); |
| case FITRIM: |
| return f2fs_ioc_fitrim(filp, arg); |
| case F2FS_IOC_SET_ENCRYPTION_POLICY: |
| return f2fs_ioc_set_encryption_policy(filp, arg); |
| case F2FS_IOC_GET_ENCRYPTION_POLICY: |
| return f2fs_ioc_get_encryption_policy(filp, arg); |
| case F2FS_IOC_GET_ENCRYPTION_PWSALT: |
| return f2fs_ioc_get_encryption_pwsalt(filp, arg); |
| case F2FS_IOC_GARBAGE_COLLECT: |
| return f2fs_ioc_gc(filp, arg); |
| case F2FS_IOC_WRITE_CHECKPOINT: |
| return f2fs_ioc_write_checkpoint(filp, arg); |
| case F2FS_IOC_DEFRAGMENT: |
| return f2fs_ioc_defragment(filp, arg); |
| default: |
| return -ENOTTY; |
| } |
| } |
| |
| static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
| { |
| struct file *file = iocb->ki_filp; |
| struct inode *inode = file_inode(file); |
| ssize_t ret; |
| |
| if (f2fs_encrypted_inode(inode) && |
| !fscrypt_has_encryption_key(inode) && |
| fscrypt_get_encryption_info(inode)) |
| return -EACCES; |
| |
| inode_lock(inode); |
| ret = generic_write_checks(iocb, from); |
| if (ret > 0) { |
| ret = f2fs_preallocate_blocks(iocb, from); |
| if (!ret) |
| ret = __generic_file_write_iter(iocb, from); |
| } |
| inode_unlock(inode); |
| |
| if (ret > 0) { |
| ssize_t err; |
| |
| err = generic_write_sync(file, iocb->ki_pos - ret, ret); |
| if (err < 0) |
| ret = err; |
| } |
| return ret; |
| } |
| |
| #ifdef CONFIG_COMPAT |
| long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| switch (cmd) { |
| case F2FS_IOC32_GETFLAGS: |
| cmd = F2FS_IOC_GETFLAGS; |
| break; |
| case F2FS_IOC32_SETFLAGS: |
| cmd = F2FS_IOC_SETFLAGS; |
| break; |
| case F2FS_IOC32_GETVERSION: |
| cmd = F2FS_IOC_GETVERSION; |
| break; |
| case F2FS_IOC_START_ATOMIC_WRITE: |
| case F2FS_IOC_COMMIT_ATOMIC_WRITE: |
| case F2FS_IOC_START_VOLATILE_WRITE: |
| case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
| case F2FS_IOC_ABORT_VOLATILE_WRITE: |
| case F2FS_IOC_SHUTDOWN: |
| case F2FS_IOC_SET_ENCRYPTION_POLICY: |
| case F2FS_IOC_GET_ENCRYPTION_PWSALT: |
| case F2FS_IOC_GET_ENCRYPTION_POLICY: |
| case F2FS_IOC_GARBAGE_COLLECT: |
| case F2FS_IOC_WRITE_CHECKPOINT: |
| case F2FS_IOC_DEFRAGMENT: |
| break; |
| default: |
| return -ENOIOCTLCMD; |
| } |
| return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
| } |
| #endif |
| |
| const struct file_operations f2fs_file_operations = { |
| .llseek = f2fs_llseek, |
| .read_iter = generic_file_read_iter, |
| .write_iter = f2fs_file_write_iter, |
| .open = f2fs_file_open, |
| .release = f2fs_release_file, |
| .mmap = f2fs_file_mmap, |
| .fsync = f2fs_sync_file, |
| .fallocate = f2fs_fallocate, |
| .unlocked_ioctl = f2fs_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = f2fs_compat_ioctl, |
| #endif |
| .splice_read = generic_file_splice_read, |
| .splice_write = iter_file_splice_write, |
| }; |