| /* |
| * 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/uio.h> |
| #include <linux/uuid.h> |
| #include <linux/file.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 vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf) |
| { |
| struct inode *inode = file_inode(vmf->vma->vm_file); |
| vm_fault_t ret; |
| |
| down_read(&F2FS_I(inode)->i_mmap_sem); |
| ret = filemap_fault(vmf); |
| up_read(&F2FS_I(inode)->i_mmap_sem); |
| |
| return ret; |
| } |
| |
| static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf) |
| { |
| struct page *page = vmf->page; |
| 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; |
| |
| if (unlikely(f2fs_cp_error(sbi))) { |
| err = -EIO; |
| goto 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(vmf->vma->vm_file); |
| down_read(&F2FS_I(inode)->i_mmap_sem); |
| 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_sem; |
| } |
| |
| /* |
| * 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)) { |
| loff_t offset; |
| |
| offset = i_size_read(inode) & ~PAGE_MASK; |
| zero_user_segment(page, offset, PAGE_SIZE); |
| } |
| set_page_dirty(page); |
| if (!PageUptodate(page)) |
| SetPageUptodate(page); |
| |
| f2fs_update_iostat(sbi, APP_MAPPED_IO, F2FS_BLKSIZE); |
| |
| trace_f2fs_vm_page_mkwrite(page, DATA); |
| mapped: |
| /* fill the page */ |
| f2fs_wait_on_page_writeback(page, DATA, false); |
| |
| /* wait for GCed page writeback via META_MAPPING */ |
| f2fs_wait_on_block_writeback(inode, dn.data_blkaddr); |
| |
| out_sem: |
| up_read(&F2FS_I(inode)->i_mmap_sem); |
| out: |
| sb_end_pagefault(inode->i_sb); |
| f2fs_update_time(sbi, REQ_TIME); |
| err: |
| return block_page_mkwrite_return(err); |
| } |
| |
| static const struct vm_operations_struct f2fs_file_vm_ops = { |
| .fault = f2fs_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; |
| |
| *pino = parent_ino(dentry); |
| dput(dentry); |
| return 1; |
| } |
| |
| static inline enum cp_reason_type need_do_checkpoint(struct inode *inode) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| enum cp_reason_type cp_reason = CP_NO_NEEDED; |
| |
| if (!S_ISREG(inode->i_mode)) |
| cp_reason = CP_NON_REGULAR; |
| else if (inode->i_nlink != 1) |
| cp_reason = CP_HARDLINK; |
| else if (is_sbi_flag_set(sbi, SBI_NEED_CP)) |
| cp_reason = CP_SB_NEED_CP; |
| else if (file_wrong_pino(inode)) |
| cp_reason = CP_WRONG_PINO; |
| else if (!f2fs_space_for_roll_forward(sbi)) |
| cp_reason = CP_NO_SPC_ROLL; |
| else if (!f2fs_is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
| cp_reason = CP_NODE_NEED_CP; |
| else if (test_opt(sbi, FASTBOOT)) |
| cp_reason = CP_FASTBOOT_MODE; |
| else if (F2FS_OPTION(sbi).active_logs == 2) |
| cp_reason = CP_SPEC_LOG_NUM; |
| else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT && |
| f2fs_need_dentry_mark(sbi, inode->i_ino) && |
| f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino, |
| TRANS_DIR_INO)) |
| cp_reason = CP_RECOVER_DIR; |
| |
| return cp_reason; |
| } |
| |
| 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)) || f2fs_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); |
| if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
| get_parent_ino(inode, &pino)) { |
| f2fs_i_pino_write(inode, pino); |
| file_got_pino(inode); |
| } |
| up_write(&fi->i_sem); |
| } |
| |
| static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end, |
| int datasync, bool atomic) |
| { |
| struct inode *inode = file->f_mapping->host; |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| nid_t ino = inode->i_ino; |
| int ret = 0; |
| enum cp_reason_type cp_reason = 0; |
| struct writeback_control wbc = { |
| .sync_mode = WB_SYNC_ALL, |
| .nr_to_write = LONG_MAX, |
| .for_reclaim = 0, |
| }; |
| unsigned int seq_id = 0; |
| |
| if (unlikely(f2fs_readonly(inode->i_sb))) |
| return 0; |
| |
| trace_f2fs_sync_file_enter(inode); |
| |
| if (S_ISDIR(inode->i_mode)) |
| goto go_write; |
| |
| /* 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(inode, FI_NEED_IPU); |
| ret = file_write_and_wait_range(file, start, end); |
| clear_inode_flag(inode, FI_NEED_IPU); |
| |
| if (ret) { |
| trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret); |
| return ret; |
| } |
| |
| /* if the inode is dirty, let's recover all the time */ |
| if (!f2fs_skip_inode_update(inode, 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(inode, FI_APPEND_WRITE) && |
| !f2fs_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(inode, FI_UPDATE_WRITE) || |
| f2fs_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(&F2FS_I(inode)->i_sem); |
| cp_reason = need_do_checkpoint(inode); |
| up_read(&F2FS_I(inode)->i_sem); |
| |
| if (cp_reason) { |
| /* 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(inode, FI_APPEND_WRITE); |
| clear_inode_flag(inode, FI_UPDATE_WRITE); |
| goto out; |
| } |
| sync_nodes: |
| atomic_inc(&sbi->wb_sync_req[NODE]); |
| ret = f2fs_fsync_node_pages(sbi, inode, &wbc, atomic, &seq_id); |
| atomic_dec(&sbi->wb_sync_req[NODE]); |
| if (ret) |
| goto out; |
| |
| /* if cp_error was enabled, we should avoid infinite loop */ |
| if (unlikely(f2fs_cp_error(sbi))) { |
| ret = -EIO; |
| goto out; |
| } |
| |
| if (f2fs_need_inode_block_update(sbi, ino)) { |
| f2fs_mark_inode_dirty_sync(inode, true); |
| f2fs_write_inode(inode, NULL); |
| goto sync_nodes; |
| } |
| |
| /* |
| * If it's atomic_write, it's just fine to keep write ordering. So |
| * here we don't need to wait for node write completion, since we use |
| * node chain which serializes node blocks. If one of node writes are |
| * reordered, we can see simply broken chain, resulting in stopping |
| * roll-forward recovery. It means we'll recover all or none node blocks |
| * given fsync mark. |
| */ |
| if (!atomic) { |
| ret = f2fs_wait_on_node_pages_writeback(sbi, seq_id); |
| if (ret) |
| goto out; |
| } |
| |
| /* once recovery info is written, don't need to tack this */ |
| f2fs_remove_ino_entry(sbi, ino, APPEND_INO); |
| clear_inode_flag(inode, FI_APPEND_WRITE); |
| flush_out: |
| if (!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER) |
| ret = f2fs_issue_flush(sbi, inode->i_ino); |
| if (!ret) { |
| f2fs_remove_ino_entry(sbi, ino, UPDATE_INO); |
| clear_inode_flag(inode, FI_UPDATE_WRITE); |
| f2fs_remove_ino_entry(sbi, ino, FLUSH_INO); |
| } |
| f2fs_update_time(sbi, REQ_TIME); |
| out: |
| trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret); |
| f2fs_trace_ios(NULL, 1); |
| return ret; |
| } |
| |
| int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
| { |
| if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file))))) |
| return -EIO; |
| return f2fs_do_sync_file(file, start, end, datasync, false); |
| } |
| |
| static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
| pgoff_t pgofs, int whence) |
| { |
| struct page *page; |
| int nr_pages; |
| |
| if (whence != SEEK_DATA) |
| return 0; |
| |
| /* find first dirty page index */ |
| nr_pages = find_get_pages_tag(mapping, &pgofs, PAGECACHE_TAG_DIRTY, |
| 1, &page); |
| if (!nr_pages) |
| return ULONG_MAX; |
| pgofs = page->index; |
| put_page(page); |
| return pgofs; |
| } |
| |
| static bool __found_offset(struct f2fs_sb_info *sbi, block_t blkaddr, |
| pgoff_t dirty, pgoff_t pgofs, int whence) |
| { |
| switch (whence) { |
| case SEEK_DATA: |
| if ((blkaddr == NEW_ADDR && dirty == pgofs) || |
| is_valid_data_blkaddr(sbi, blkaddr)) |
| 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 = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE); |
| if (err && err != -ENOENT) { |
| goto fail; |
| } else if (err == -ENOENT) { |
| /* direct node does not exists */ |
| if (whence == SEEK_DATA) { |
| pgofs = f2fs_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.inode, |
| dn.node_page, dn.ofs_in_node); |
| |
| if (__is_valid_data_blkaddr(blkaddr) && |
| !f2fs_is_valid_blkaddr(F2FS_I_SB(inode), |
| blkaddr, DATA_GENERIC)) { |
| f2fs_put_dnode(&dn); |
| goto fail; |
| } |
| |
| if (__found_offset(F2FS_I_SB(inode), 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 (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) |
| return -EIO; |
| |
| /* 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 err = fscrypt_file_open(inode, filp); |
| |
| if (err) |
| return err; |
| |
| filp->f_mode |= FMODE_NOWAIT; |
| |
| return dquot_file_open(inode, filp); |
| } |
| |
| void f2fs_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; |
| int base = 0; |
| |
| if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode)) |
| base = get_extra_isize(dn->inode); |
| |
| raw_node = F2FS_NODE(dn->node_page); |
| addr = blkaddr_in_node(raw_node) + base + 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; |
| f2fs_set_data_blkaddr(dn); |
| |
| if (__is_valid_data_blkaddr(blkaddr) && |
| !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) |
| continue; |
| |
| f2fs_invalidate_blocks(sbi, blkaddr); |
| if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page)) |
| clear_inode_flag(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 = f2fs_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); |
| } |
| 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); |
| } |
| |
| void f2fs_truncate_data_blocks(struct dnode_of_data *dn) |
| { |
| f2fs_truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); |
| } |
| |
| static int truncate_partial_data_page(struct inode *inode, u64 from, |
| bool cache_only) |
| { |
| loff_t 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 = find_lock_page(mapping, index); |
| if (page && PageUptodate(page)) |
| goto truncate_out; |
| f2fs_put_page(page, 1); |
| return 0; |
| } |
| |
| page = f2fs_get_lock_data_page(inode, index, true); |
| if (IS_ERR(page)) |
| return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page); |
| truncate_out: |
| f2fs_wait_on_page_writeback(page, DATA, true); |
| zero_user(page, offset, PAGE_SIZE - offset); |
| |
| /* An encrypted inode should have a key and truncate the last page. */ |
| f2fs_bug_on(F2FS_I_SB(inode), cache_only && f2fs_encrypted_inode(inode)); |
| if (!cache_only) |
| set_page_dirty(page); |
| f2fs_put_page(page, 1); |
| return 0; |
| } |
| |
| int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 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_BLK_ALIGN(from); |
| |
| if (free_from >= sbi->max_file_blocks) |
| goto free_partial; |
| |
| if (lock) |
| f2fs_lock_op(sbi); |
| |
| ipage = f2fs_get_node_page(sbi, inode->i_ino); |
| if (IS_ERR(ipage)) { |
| err = PTR_ERR(ipage); |
| goto out; |
| } |
| |
| if (f2fs_has_inline_data(inode)) { |
| f2fs_truncate_inline_inode(inode, ipage, from); |
| f2fs_put_page(ipage, 1); |
| truncate_page = true; |
| goto out; |
| } |
| |
| set_new_dnode(&dn, inode, ipage, NULL, 0); |
| err = f2fs_get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA); |
| 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)) { |
| f2fs_truncate_data_blocks_range(&dn, count); |
| free_from += count; |
| } |
| |
| f2fs_put_dnode(&dn); |
| free_next: |
| err = f2fs_truncate_inode_blocks(inode, free_from); |
| out: |
| if (lock) |
| f2fs_unlock_op(sbi); |
| free_partial: |
| /* 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) |
| { |
| int err; |
| |
| if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) |
| return -EIO; |
| |
| if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| S_ISLNK(inode->i_mode))) |
| return 0; |
| |
| trace_f2fs_truncate(inode); |
| |
| if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE)) { |
| f2fs_show_injection_info(FAULT_TRUNCATE); |
| return -EIO; |
| } |
| |
| /* we should check inline_data size */ |
| if (!f2fs_may_inline_data(inode)) { |
| err = f2fs_convert_inline_inode(inode); |
| if (err) |
| return err; |
| } |
| |
| err = f2fs_truncate_blocks(inode, i_size_read(inode), true); |
| if (err) |
| return err; |
| |
| inode->i_mtime = inode->i_ctime = current_time(inode); |
| f2fs_mark_inode_dirty_sync(inode, false); |
| return 0; |
| } |
| |
| int f2fs_getattr(const struct path *path, struct kstat *stat, |
| u32 request_mask, unsigned int query_flags) |
| { |
| struct inode *inode = d_inode(path->dentry); |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| struct f2fs_inode *ri; |
| unsigned int flags; |
| |
| if (f2fs_has_extra_attr(inode) && |
| f2fs_sb_has_inode_crtime(inode->i_sb) && |
| F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) { |
| stat->result_mask |= STATX_BTIME; |
| stat->btime.tv_sec = fi->i_crtime.tv_sec; |
| stat->btime.tv_nsec = fi->i_crtime.tv_nsec; |
| } |
| |
| flags = fi->i_flags & F2FS_FL_USER_VISIBLE; |
| if (flags & F2FS_APPEND_FL) |
| stat->attributes |= STATX_ATTR_APPEND; |
| if (flags & F2FS_COMPR_FL) |
| stat->attributes |= STATX_ATTR_COMPRESSED; |
| if (f2fs_encrypted_inode(inode)) |
| stat->attributes |= STATX_ATTR_ENCRYPTED; |
| if (flags & F2FS_IMMUTABLE_FL) |
| stat->attributes |= STATX_ATTR_IMMUTABLE; |
| if (flags & F2FS_NODUMP_FL) |
| stat->attributes |= STATX_ATTR_NODUMP; |
| |
| stat->attributes_mask |= (STATX_ATTR_APPEND | |
| STATX_ATTR_COMPRESSED | |
| STATX_ATTR_ENCRYPTED | |
| STATX_ATTR_IMMUTABLE | |
| STATX_ATTR_NODUMP); |
| |
| generic_fillattr(inode, stat); |
| |
| /* we need to show initial sectors used for inline_data/dentries */ |
| if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) || |
| f2fs_has_inline_dentry(inode)) |
| stat->blocks += (stat->size + 511) >> 9; |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_F2FS_FS_POSIX_ACL |
| static void __setattr_copy(struct inode *inode, const struct iattr *attr) |
| { |
| 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 = timespec64_trunc(attr->ia_atime, |
| inode->i_sb->s_time_gran); |
| if (ia_valid & ATTR_MTIME) |
| inode->i_mtime = timespec64_trunc(attr->ia_mtime, |
| inode->i_sb->s_time_gran); |
| if (ia_valid & ATTR_CTIME) |
| inode->i_ctime = timespec64_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(inode, mode); |
| } |
| } |
| #else |
| #define __setattr_copy setattr_copy |
| #endif |
| |
| int f2fs_setattr(struct dentry *dentry, struct iattr *attr) |
| { |
| struct inode *inode = d_inode(dentry); |
| int err; |
| |
| if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) |
| return -EIO; |
| |
| err = setattr_prepare(dentry, attr); |
| if (err) |
| return err; |
| |
| err = fscrypt_prepare_setattr(dentry, attr); |
| if (err) |
| return err; |
| |
| if (is_quota_modification(inode, attr)) { |
| err = dquot_initialize(inode); |
| if (err) |
| return err; |
| } |
| if ((attr->ia_valid & ATTR_UID && |
| !uid_eq(attr->ia_uid, inode->i_uid)) || |
| (attr->ia_valid & ATTR_GID && |
| !gid_eq(attr->ia_gid, inode->i_gid))) { |
| err = dquot_transfer(inode, attr); |
| if (err) |
| return err; |
| } |
| |
| if (attr->ia_valid & ATTR_SIZE) { |
| bool to_smaller = (attr->ia_size <= i_size_read(inode)); |
| |
| down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| down_write(&F2FS_I(inode)->i_mmap_sem); |
| |
| truncate_setsize(inode, attr->ia_size); |
| |
| if (to_smaller) |
| err = f2fs_truncate(inode); |
| /* |
| * do not trim all blocks after i_size if target size is |
| * larger than i_size. |
| */ |
| up_write(&F2FS_I(inode)->i_mmap_sem); |
| up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| |
| if (err) |
| return err; |
| |
| if (!to_smaller) { |
| /* 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(inode); |
| } |
| |
| down_write(&F2FS_I(inode)->i_sem); |
| F2FS_I(inode)->last_disk_size = i_size_read(inode); |
| up_write(&F2FS_I(inode)->i_sem); |
| } |
| |
| __setattr_copy(inode, attr); |
| |
| if (attr->ia_valid & ATTR_MODE) { |
| err = posix_acl_chmod(inode, f2fs_get_inode_mode(inode)); |
| if (err || is_inode_flag_set(inode, FI_ACL_MODE)) { |
| inode->i_mode = F2FS_I(inode)->i_acl_mode; |
| clear_inode_flag(inode, FI_ACL_MODE); |
| } |
| } |
| |
| /* file size may changed here */ |
| f2fs_mark_inode_dirty_sync(inode, true); |
| |
| /* inode change will produce dirty node pages flushed by checkpoint */ |
| f2fs_balance_fs(F2FS_I_SB(inode), true); |
| |
| 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 |
| .listxattr = f2fs_listxattr, |
| #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 = f2fs_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 f2fs_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 = f2fs_get_dnode_of_data(&dn, pg_start, LOOKUP_NODE); |
| if (err) { |
| if (err == -ENOENT) { |
| pg_start = f2fs_get_next_page_offset(&dn, |
| 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); |
| |
| f2fs_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; |
| |
| down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| down_write(&F2FS_I(inode)->i_mmap_sem); |
| |
| truncate_inode_pages_range(mapping, blk_start, |
| blk_end - 1); |
| |
| f2fs_lock_op(sbi); |
| ret = f2fs_truncate_hole(inode, pg_start, pg_end); |
| f2fs_unlock_op(sbi); |
| |
| up_write(&F2FS_I(inode)->i_mmap_sem); |
| up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr, |
| int *do_replace, pgoff_t off, pgoff_t len) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct dnode_of_data dn; |
| int ret, done, i; |
| |
| next_dnode: |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA); |
| if (ret && ret != -ENOENT) { |
| return ret; |
| } else if (ret == -ENOENT) { |
| if (dn.max_level == 0) |
| return -ENOENT; |
| done = min((pgoff_t)ADDRS_PER_BLOCK - dn.ofs_in_node, len); |
| blkaddr += done; |
| do_replace += done; |
| goto next; |
| } |
| |
| done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) - |
| dn.ofs_in_node, len); |
| for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) { |
| *blkaddr = datablock_addr(dn.inode, |
| dn.node_page, dn.ofs_in_node); |
| if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) { |
| |
| if (test_opt(sbi, LFS)) { |
| f2fs_put_dnode(&dn); |
| return -ENOTSUPP; |
| } |
| |
| /* do not invalidate this block address */ |
| f2fs_update_data_blkaddr(&dn, NULL_ADDR); |
| *do_replace = 1; |
| } |
| } |
| f2fs_put_dnode(&dn); |
| next: |
| len -= done; |
| off += done; |
| if (len) |
| goto next_dnode; |
| return 0; |
| } |
| |
| static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr, |
| int *do_replace, pgoff_t off, int len) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct dnode_of_data dn; |
| int ret, i; |
| |
| for (i = 0; i < len; i++, do_replace++, blkaddr++) { |
| if (*do_replace == 0) |
| continue; |
| |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| ret = f2fs_get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA); |
| if (ret) { |
| dec_valid_block_count(sbi, inode, 1); |
| f2fs_invalidate_blocks(sbi, *blkaddr); |
| } else { |
| f2fs_update_data_blkaddr(&dn, *blkaddr); |
| } |
| f2fs_put_dnode(&dn); |
| } |
| return 0; |
| } |
| |
| static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode, |
| block_t *blkaddr, int *do_replace, |
| pgoff_t src, pgoff_t dst, pgoff_t len, bool full) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode); |
| pgoff_t i = 0; |
| int ret; |
| |
| while (i < len) { |
| if (blkaddr[i] == NULL_ADDR && !full) { |
| i++; |
| continue; |
| } |
| |
| if (do_replace[i] || blkaddr[i] == NULL_ADDR) { |
| struct dnode_of_data dn; |
| struct node_info ni; |
| size_t new_size; |
| pgoff_t ilen; |
| |
| set_new_dnode(&dn, dst_inode, NULL, NULL, 0); |
| ret = f2fs_get_dnode_of_data(&dn, dst + i, ALLOC_NODE); |
| if (ret) |
| return ret; |
| |
| ret = f2fs_get_node_info(sbi, dn.nid, &ni); |
| if (ret) { |
| f2fs_put_dnode(&dn); |
| return ret; |
| } |
| |
| ilen = min((pgoff_t) |
| ADDRS_PER_PAGE(dn.node_page, dst_inode) - |
| dn.ofs_in_node, len - i); |
| do { |
| dn.data_blkaddr = datablock_addr(dn.inode, |
| dn.node_page, dn.ofs_in_node); |
| f2fs_truncate_data_blocks_range(&dn, 1); |
| |
| if (do_replace[i]) { |
| f2fs_i_blocks_write(src_inode, |
| 1, false, false); |
| f2fs_i_blocks_write(dst_inode, |
| 1, true, false); |
| f2fs_replace_block(sbi, &dn, dn.data_blkaddr, |
| blkaddr[i], ni.version, true, false); |
| |
| do_replace[i] = 0; |
| } |
| dn.ofs_in_node++; |
| i++; |
| new_size = (loff_t)(dst + i) << PAGE_SHIFT; |
| if (dst_inode->i_size < new_size) |
| f2fs_i_size_write(dst_inode, new_size); |
| } while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR)); |
| |
| f2fs_put_dnode(&dn); |
| } else { |
| struct page *psrc, *pdst; |
| |
| psrc = f2fs_get_lock_data_page(src_inode, |
| src + i, true); |
| if (IS_ERR(psrc)) |
| return PTR_ERR(psrc); |
| pdst = f2fs_get_new_data_page(dst_inode, NULL, dst + i, |
| 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); |
| |
| ret = f2fs_truncate_hole(src_inode, |
| src + i, src + i + 1); |
| if (ret) |
| return ret; |
| i++; |
| } |
| } |
| return 0; |
| } |
| |
| static int __exchange_data_block(struct inode *src_inode, |
| struct inode *dst_inode, pgoff_t src, pgoff_t dst, |
| pgoff_t len, bool full) |
| { |
| block_t *src_blkaddr; |
| int *do_replace; |
| pgoff_t olen; |
| int ret; |
| |
| while (len) { |
| olen = min((pgoff_t)4 * ADDRS_PER_BLOCK, len); |
| |
| src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode), |
| array_size(olen, sizeof(block_t)), |
| GFP_KERNEL); |
| if (!src_blkaddr) |
| return -ENOMEM; |
| |
| do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode), |
| array_size(olen, sizeof(int)), |
| GFP_KERNEL); |
| if (!do_replace) { |
| kvfree(src_blkaddr); |
| return -ENOMEM; |
| } |
| |
| ret = __read_out_blkaddrs(src_inode, src_blkaddr, |
| do_replace, src, olen); |
| if (ret) |
| goto roll_back; |
| |
| ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr, |
| do_replace, src, dst, olen, full); |
| if (ret) |
| goto roll_back; |
| |
| src += olen; |
| dst += olen; |
| len -= olen; |
| |
| kvfree(src_blkaddr); |
| kvfree(do_replace); |
| } |
| return 0; |
| |
| roll_back: |
| __roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, olen); |
| kvfree(src_blkaddr); |
| kvfree(do_replace); |
| return ret; |
| } |
| |
| static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; |
| pgoff_t start = offset >> PAGE_SHIFT; |
| pgoff_t end = (offset + len) >> PAGE_SHIFT; |
| int ret; |
| |
| f2fs_balance_fs(sbi, true); |
| |
| /* avoid gc operation during block exchange */ |
| down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| down_write(&F2FS_I(inode)->i_mmap_sem); |
| |
| f2fs_lock_op(sbi); |
| f2fs_drop_extent_tree(inode); |
| truncate_pagecache(inode, offset); |
| ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true); |
| f2fs_unlock_op(sbi); |
| |
| up_write(&F2FS_I(inode)->i_mmap_sem); |
| up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| return ret; |
| } |
| |
| static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) |
| { |
| 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; |
| |
| /* write out all dirty pages from offset */ |
| ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| if (ret) |
| return ret; |
| |
| ret = f2fs_do_collapse(inode, offset, len); |
| if (ret) |
| return ret; |
| |
| /* write out all moved pages, if possible */ |
| down_write(&F2FS_I(inode)->i_mmap_sem); |
| 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 = f2fs_truncate_blocks(inode, new_size, true); |
| up_write(&F2FS_I(inode)->i_mmap_sem); |
| if (!ret) |
| f2fs_i_size_write(inode, new_size); |
| return ret; |
| } |
| |
| static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start, |
| pgoff_t end) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| pgoff_t index = start; |
| unsigned int ofs_in_node = dn->ofs_in_node; |
| blkcnt_t count = 0; |
| int ret; |
| |
| for (; index < end; index++, dn->ofs_in_node++) { |
| if (datablock_addr(dn->inode, dn->node_page, |
| dn->ofs_in_node) == NULL_ADDR) |
| count++; |
| } |
| |
| dn->ofs_in_node = ofs_in_node; |
| ret = f2fs_reserve_new_blocks(dn, count); |
| if (ret) |
| return ret; |
| |
| dn->ofs_in_node = ofs_in_node; |
| for (index = start; index < end; index++, dn->ofs_in_node++) { |
| dn->data_blkaddr = datablock_addr(dn->inode, |
| dn->node_page, dn->ofs_in_node); |
| /* |
| * f2fs_reserve_new_blocks will not guarantee entire block |
| * allocation. |
| */ |
| if (dn->data_blkaddr == NULL_ADDR) { |
| ret = -ENOSPC; |
| break; |
| } |
| if (dn->data_blkaddr != NEW_ADDR) { |
| f2fs_invalidate_blocks(sbi, dn->data_blkaddr); |
| dn->data_blkaddr = NEW_ADDR; |
| f2fs_set_data_blkaddr(dn); |
| } |
| } |
| |
| f2fs_update_extent_cache_range(dn, start, 0, index - start); |
| |
| 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; |
| |
| 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; |
| |
| 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;) { |
| struct dnode_of_data dn; |
| unsigned int end_offset; |
| pgoff_t end; |
| |
| down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| down_write(&F2FS_I(inode)->i_mmap_sem); |
| |
| truncate_pagecache_range(inode, |
| (loff_t)index << PAGE_SHIFT, |
| ((loff_t)pg_end << PAGE_SHIFT) - 1); |
| |
| f2fs_lock_op(sbi); |
| |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE); |
| if (ret) { |
| f2fs_unlock_op(sbi); |
| up_write(&F2FS_I(inode)->i_mmap_sem); |
| up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| goto out; |
| } |
| |
| end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
| end = min(pg_end, end_offset - dn.ofs_in_node + index); |
| |
| ret = f2fs_do_zero_range(&dn, index, end); |
| f2fs_put_dnode(&dn); |
| |
| f2fs_unlock_op(sbi); |
| up_write(&F2FS_I(inode)->i_mmap_sem); |
| up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| |
| f2fs_balance_fs(sbi, dn.node_changed); |
| |
| if (ret) |
| goto out; |
| |
| index = end; |
| new_size = max_t(loff_t, new_size, |
| (loff_t)index << 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 (new_size > i_size_read(inode)) { |
| if (mode & FALLOC_FL_KEEP_SIZE) |
| file_set_keep_isize(inode); |
| else |
| f2fs_i_size_write(inode, new_size); |
| } |
| 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 nr, pg_start, pg_end, delta, idx; |
| loff_t new_size; |
| int ret = 0; |
| |
| new_size = i_size_read(inode) + len; |
| ret = inode_newsize_ok(inode, new_size); |
| if (ret) |
| return ret; |
| |
| 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); |
| |
| down_write(&F2FS_I(inode)->i_mmap_sem); |
| ret = f2fs_truncate_blocks(inode, i_size_read(inode), true); |
| up_write(&F2FS_I(inode)->i_mmap_sem); |
| 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; |
| |
| pg_start = offset >> PAGE_SHIFT; |
| pg_end = (offset + len) >> PAGE_SHIFT; |
| delta = pg_end - pg_start; |
| idx = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; |
| |
| /* avoid gc operation during block exchange */ |
| down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| down_write(&F2FS_I(inode)->i_mmap_sem); |
| truncate_pagecache(inode, offset); |
| |
| while (!ret && idx > pg_start) { |
| nr = idx - pg_start; |
| if (nr > delta) |
| nr = delta; |
| idx -= nr; |
| |
| f2fs_lock_op(sbi); |
| f2fs_drop_extent_tree(inode); |
| |
| ret = __exchange_data_block(inode, inode, idx, |
| idx + delta, nr, false); |
| f2fs_unlock_op(sbi); |
| } |
| up_write(&F2FS_I(inode)->i_mmap_sem); |
| up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| |
| /* write out all moved pages, if possible */ |
| down_write(&F2FS_I(inode)->i_mmap_sem); |
| filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| truncate_pagecache(inode, offset); |
| up_write(&F2FS_I(inode)->i_mmap_sem); |
| |
| if (!ret) |
| f2fs_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); |
| struct f2fs_map_blocks map = { .m_next_pgofs = NULL, |
| .m_next_extent = NULL, .m_seg_type = NO_CHECK_TYPE }; |
| pgoff_t pg_end; |
| loff_t new_size = i_size_read(inode); |
| loff_t off_end; |
| int err; |
| |
| err = inode_newsize_ok(inode, (len + offset)); |
| if (err) |
| return err; |
| |
| err = f2fs_convert_inline_inode(inode); |
| if (err) |
| return err; |
| |
| f2fs_balance_fs(sbi, true); |
| |
| pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT; |
| off_end = (offset + len) & (PAGE_SIZE - 1); |
| |
| map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT; |
| map.m_len = pg_end - map.m_lblk; |
| if (off_end) |
| map.m_len++; |
| |
| err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); |
| if (err) { |
| pgoff_t last_off; |
| |
| if (!map.m_len) |
| return err; |
| |
| last_off = map.m_lblk + map.m_len - 1; |
| |
| /* update new size to the failed position */ |
| new_size = (last_off == pg_end) ? offset + len : |
| (loff_t)(last_off + 1) << PAGE_SHIFT; |
| } else { |
| new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end; |
| } |
| |
| if (new_size > i_size_read(inode)) { |
| if (mode & FALLOC_FL_KEEP_SIZE) |
| file_set_keep_isize(inode); |
| else |
| f2fs_i_size_write(inode, new_size); |
| } |
| |
| return err; |
| } |
| |
| static long f2fs_fallocate(struct file *file, int mode, |
| loff_t offset, loff_t len) |
| { |
| struct inode *inode = file_inode(file); |
| long ret = 0; |
| |
| if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) |
| return -EIO; |
| |
| /* 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(inode); |
| f2fs_mark_inode_dirty_sync(inode, false); |
| 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) |
| { |
| /* |
| * f2fs_relase_file is called at every close calls. So we should |
| * not drop any inmemory pages by close called by other process. |
| */ |
| if (!(filp->f_mode & FMODE_WRITE) || |
| atomic_read(&inode->i_writecount) != 1) |
| return 0; |
| |
| /* some remained atomic pages should discarded */ |
| if (f2fs_is_atomic_file(inode)) |
| f2fs_drop_inmem_pages(inode); |
| if (f2fs_is_volatile_file(inode)) { |
| set_inode_flag(inode, FI_DROP_CACHE); |
| filemap_fdatawrite(inode->i_mapping); |
| clear_inode_flag(inode, FI_DROP_CACHE); |
| clear_inode_flag(inode, FI_VOLATILE_FILE); |
| stat_dec_volatile_write(inode); |
| } |
| return 0; |
| } |
| |
| static int f2fs_file_flush(struct file *file, fl_owner_t id) |
| { |
| struct inode *inode = file_inode(file); |
| |
| /* |
| * If the process doing a transaction is crashed, we should do |
| * roll-back. Otherwise, other reader/write can see corrupted database |
| * until all the writers close its file. Since this should be done |
| * before dropping file lock, it needs to do in ->flush. |
| */ |
| if (f2fs_is_atomic_file(inode) && |
| F2FS_I(inode)->inmem_task == current) |
| f2fs_drop_inmem_pages(inode); |
| return 0; |
| } |
| |
| 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; |
| |
| if (f2fs_encrypted_inode(inode)) |
| flags |= F2FS_ENCRYPT_FL; |
| if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) |
| flags |= F2FS_INLINE_DATA_FL; |
| |
| flags &= F2FS_FL_USER_VISIBLE; |
| |
| return put_user(flags, (int __user *)arg); |
| } |
| |
| static int __f2fs_ioc_setflags(struct inode *inode, unsigned int flags) |
| { |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| unsigned int oldflags; |
| |
| /* Is it quota file? Do not allow user to mess with it */ |
| if (IS_NOQUOTA(inode)) |
| return -EPERM; |
| |
| flags = f2fs_mask_flags(inode->i_mode, flags); |
| |
| oldflags = fi->i_flags; |
| |
| if ((flags ^ oldflags) & (F2FS_APPEND_FL | F2FS_IMMUTABLE_FL)) |
| if (!capable(CAP_LINUX_IMMUTABLE)) |
| return -EPERM; |
| |
| flags = flags & F2FS_FL_USER_MODIFIABLE; |
| flags |= oldflags & ~F2FS_FL_USER_MODIFIABLE; |
| fi->i_flags = flags; |
| |
| if (fi->i_flags & F2FS_PROJINHERIT_FL) |
| set_inode_flag(inode, FI_PROJ_INHERIT); |
| else |
| clear_inode_flag(inode, FI_PROJ_INHERIT); |
| |
| inode->i_ctime = current_time(inode); |
| f2fs_set_inode_flags(inode); |
| f2fs_mark_inode_dirty_sync(inode, true); |
| return 0; |
| } |
| |
| static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| unsigned int flags; |
| int ret; |
| |
| if (!inode_owner_or_capable(inode)) |
| return -EACCES; |
| |
| if (get_user(flags, (int __user *)arg)) |
| return -EFAULT; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| inode_lock(inode); |
| |
| ret = __f2fs_ioc_setflags(inode, flags); |
| |
| inode_unlock(inode); |
| 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 (!S_ISREG(inode->i_mode)) |
| return -EINVAL; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| inode_lock(inode); |
| |
| if (f2fs_is_atomic_file(inode)) { |
| if (is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = f2fs_convert_inline_inode(inode); |
| if (ret) |
| goto out; |
| |
| down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| |
| /* |
| * Should wait end_io to count F2FS_WB_CP_DATA correctly by |
| * f2fs_is_atomic_file. |
| */ |
| if (get_dirty_pages(inode)) |
| f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING, |
| "Unexpected flush for atomic writes: ino=%lu, npages=%u", |
| inode->i_ino, get_dirty_pages(inode)); |
| ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); |
| if (ret) { |
| up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| goto out; |
| } |
| |
| set_inode_flag(inode, FI_ATOMIC_FILE); |
| clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST); |
| up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
| |
| f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| F2FS_I(inode)->inmem_task = current; |
| stat_inc_atomic_write(inode); |
| stat_update_max_atomic_write(inode); |
| out: |
| inode_unlock(inode); |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| 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; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| f2fs_balance_fs(F2FS_I_SB(inode), true); |
| |
| inode_lock(inode); |
| |
| if (f2fs_is_volatile_file(inode)) { |
| ret = -EINVAL; |
| goto err_out; |
| } |
| |
| if (f2fs_is_atomic_file(inode)) { |
| ret = f2fs_commit_inmem_pages(inode); |
| if (ret) |
| goto err_out; |
| |
| ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); |
| if (!ret) { |
| clear_inode_flag(inode, FI_ATOMIC_FILE); |
| F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC] = 0; |
| stat_dec_atomic_write(inode); |
| } |
| } else { |
| ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false); |
| } |
| err_out: |
| if (is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) { |
| clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST); |
| ret = -EINVAL; |
| } |
| inode_unlock(inode); |
| 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 (!S_ISREG(inode->i_mode)) |
| return -EINVAL; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| inode_lock(inode); |
| |
| if (f2fs_is_volatile_file(inode)) |
| goto out; |
| |
| ret = f2fs_convert_inline_inode(inode); |
| if (ret) |
| goto out; |
| |
| stat_inc_volatile_write(inode); |
| stat_update_max_volatile_write(inode); |
| |
| set_inode_flag(inode, FI_VOLATILE_FILE); |
| f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| out: |
| inode_unlock(inode); |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| static int f2fs_ioc_release_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; |
| |
| inode_lock(inode); |
| |
| if (!f2fs_is_volatile_file(inode)) |
| goto out; |
| |
| if (!f2fs_is_first_block_written(inode)) { |
| ret = truncate_partial_data_page(inode, 0, true); |
| goto out; |
| } |
| |
| ret = punch_hole(inode, 0, F2FS_BLKSIZE); |
| out: |
| inode_unlock(inode); |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| 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; |
| |
| inode_lock(inode); |
| |
| if (f2fs_is_atomic_file(inode)) |
| f2fs_drop_inmem_pages(inode); |
| if (f2fs_is_volatile_file(inode)) { |
| clear_inode_flag(inode, FI_VOLATILE_FILE); |
| stat_dec_volatile_write(inode); |
| ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); |
| } |
| |
| clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST); |
| |
| inode_unlock(inode); |
| |
| 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; |
| int ret = 0; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (get_user(in, (__u32 __user *)arg)) |
| return -EFAULT; |
| |
| if (in != F2FS_GOING_DOWN_FULLSYNC) { |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| } |
| |
| switch (in) { |
| case F2FS_GOING_DOWN_FULLSYNC: |
| sb = freeze_bdev(sb->s_bdev); |
| if (IS_ERR(sb)) { |
| ret = PTR_ERR(sb); |
| goto out; |
| } |
| if (sb) { |
| f2fs_stop_checkpoint(sbi, false); |
| set_sbi_flag(sbi, SBI_IS_SHUTDOWN); |
| thaw_bdev(sb->s_bdev, sb); |
| } |
| break; |
| case F2FS_GOING_DOWN_METASYNC: |
| /* do checkpoint only */ |
| ret = f2fs_sync_fs(sb, 1); |
| if (ret) |
| goto out; |
| f2fs_stop_checkpoint(sbi, false); |
| set_sbi_flag(sbi, SBI_IS_SHUTDOWN); |
| break; |
| case F2FS_GOING_DOWN_NOSYNC: |
| f2fs_stop_checkpoint(sbi, false); |
| set_sbi_flag(sbi, SBI_IS_SHUTDOWN); |
| break; |
| case F2FS_GOING_DOWN_METAFLUSH: |
| f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO); |
| f2fs_stop_checkpoint(sbi, false); |
| set_sbi_flag(sbi, SBI_IS_SHUTDOWN); |
| break; |
| default: |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| f2fs_stop_gc_thread(sbi); |
| f2fs_stop_discard_thread(sbi); |
| |
| f2fs_drop_discard_cmd(sbi); |
| clear_opt(sbi, DISCARD); |
| |
| f2fs_update_time(sbi, REQ_TIME); |
| out: |
| if (in != F2FS_GOING_DOWN_FULLSYNC) |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| 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 (!f2fs_hw_support_discard(F2FS_SB(sb))) |
| return -EOPNOTSUPP; |
| |
| if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
| sizeof(range))) |
| return -EFAULT; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| range.minlen = max((unsigned int)range.minlen, |
| q->limits.discard_granularity); |
| ret = f2fs_trim_fs(F2FS_SB(sb), &range); |
| mnt_drop_write_file(filp); |
| 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 inode *inode = file_inode(filp); |
| |
| if (!f2fs_sb_has_encrypt(inode->i_sb)) |
| return -EOPNOTSUPP; |
| |
| f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| |
| return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); |
| } |
| |
| static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) |
| { |
| if (!f2fs_sb_has_encrypt(file_inode(filp)->i_sb)) |
| return -EOPNOTSUPP; |
| return fscrypt_ioctl_get_policy(filp, (void __user *)arg); |
| } |
| |
| 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_encrypt(inode->i_sb)) |
| return -EOPNOTSUPP; |
| |
| err = mnt_want_write_file(filp); |
| if (err) |
| return err; |
| |
| down_write(&sbi->sb_lock); |
| |
| if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt)) |
| goto got_it; |
| |
| /* 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); |
| goto out_err; |
| } |
| got_it: |
| if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt, |
| 16)) |
| err = -EFAULT; |
| out_err: |
| up_write(&sbi->sb_lock); |
| mnt_drop_write_file(filp); |
| return err; |
| } |
| |
| 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; |
| int ret; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (get_user(sync, (__u32 __user *)arg)) |
| return -EFAULT; |
| |
| if (f2fs_readonly(sbi->sb)) |
| return -EROFS; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| if (!sync) { |
| if (!mutex_trylock(&sbi->gc_mutex)) { |
| ret = -EBUSY; |
| goto out; |
| } |
| } else { |
| mutex_lock(&sbi->gc_mutex); |
| } |
| |
| ret = f2fs_gc(sbi, sync, true, NULL_SEGNO); |
| out: |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct f2fs_gc_range range; |
| u64 end; |
| int ret; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg, |
| sizeof(range))) |
| return -EFAULT; |
| |
| if (f2fs_readonly(sbi->sb)) |
| return -EROFS; |
| |
| end = range.start + range.len; |
| if (range.start < MAIN_BLKADDR(sbi) || end >= MAX_BLKADDR(sbi)) { |
| return -EINVAL; |
| } |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| do_more: |
| if (!range.sync) { |
| if (!mutex_trylock(&sbi->gc_mutex)) { |
| ret = -EBUSY; |
| goto out; |
| } |
| } else { |
| mutex_lock(&sbi->gc_mutex); |
| } |
| |
| ret = f2fs_gc(sbi, range.sync, true, GET_SEGNO(sbi, range.start)); |
| range.start += BLKS_PER_SEC(sbi); |
| if (range.start <= end) |
| goto do_more; |
| out: |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| 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); |
| int ret; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (f2fs_readonly(sbi->sb)) |
| return -EROFS; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| ret = f2fs_sync_fs(sbi->sb, 1); |
| |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| 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_extent = NULL, |
| .m_seg_type = NO_CHECK_TYPE }; |
| struct extent_info ei = {0, 0, 0}; |
| pgoff_t pg_start, pg_end, next_pgofs; |
| unsigned int blk_per_seg = sbi->blocks_per_seg; |
| unsigned int total = 0, sec_num; |
| block_t blk_end = 0; |
| bool fragmented = false; |
| int err; |
| |
| /* if in-place-update policy is enabled, don't waste time here */ |
| if (f2fs_should_update_inplace(inode, NULL)) |
| 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; |
| map.m_next_pgofs = &next_pgofs; |
| |
| /* |
| * 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_DEFAULT); |
| if (err) |
| goto out; |
| |
| if (!(map.m_flags & F2FS_MAP_FLAGS)) { |
| map.m_lblk = next_pgofs; |
| continue; |
| } |
| |
| if (blk_end && blk_end != map.m_pblk) |
| fragmented = true; |
| |
| /* record total count of block that we're going to move */ |
| total += map.m_len; |
| |
| blk_end = map.m_pblk + map.m_len; |
| |
| map.m_lblk += map.m_len; |
| } |
| |
| if (!fragmented) |
| goto out; |
| |
| sec_num = (total + BLKS_PER_SEC(sbi) - 1) / BLKS_PER_SEC(sbi); |
| |
| /* |
| * 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, 0, sec_num)) { |
| err = -EAGAIN; |
| goto out; |
| } |
| |
| map.m_lblk = pg_start; |
| map.m_len = pg_end - pg_start; |
| total = 0; |
| |
| 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_DEFAULT); |
| if (err) |
| goto clear_out; |
| |
| if (!(map.m_flags & F2FS_MAP_FLAGS)) { |
| map.m_lblk = next_pgofs; |
| continue; |
| } |
| |
| set_inode_flag(inode, FI_DO_DEFRAG); |
| |
| idx = map.m_lblk; |
| while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) { |
| struct page *page; |
| |
| page = f2fs_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(inode, FI_DO_DEFRAG); |
| |
| err = filemap_fdatawrite(inode->i_mapping); |
| if (err) |
| goto out; |
| } |
| clear_out: |
| clear_inode_flag(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) || f2fs_is_atomic_file(inode)) |
| return -EINVAL; |
| |
| if (f2fs_readonly(sbi->sb)) |
| return -EROFS; |
| |
| if (copy_from_user(&range, (struct f2fs_defragment __user *)arg, |
| sizeof(range))) |
| return -EFAULT; |
| |
| /* verify alignment of offset & size */ |
| if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1)) |
| return -EINVAL; |
| |
| if (unlikely((range.start + range.len) >> PAGE_SHIFT > |
| sbi->max_file_blocks)) |
| return -EINVAL; |
| |
| err = mnt_want_write_file(filp); |
| if (err) |
| return err; |
| |
| err = f2fs_defragment_range(sbi, filp, &range); |
| mnt_drop_write_file(filp); |
| |
| f2fs_update_time(sbi, REQ_TIME); |
| if (err < 0) |
| return err; |
| |
| if (copy_to_user((struct f2fs_defragment __user *)arg, &range, |
| sizeof(range))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| static int f2fs_move_file_range(struct file *file_in, loff_t pos_in, |
| struct file *file_out, loff_t pos_out, size_t len) |
| { |
| struct inode *src = file_inode(file_in); |
| struct inode *dst = file_inode(file_out); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(src); |
| size_t olen = len, dst_max_i_size = 0; |
| size_t dst_osize; |
| int ret; |
| |
| if (file_in->f_path.mnt != file_out->f_path.mnt || |
| src->i_sb != dst->i_sb) |
| return -EXDEV; |
| |
| if (unlikely(f2fs_readonly(src->i_sb))) |
| return -EROFS; |
| |
| if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode)) |
| return -EINVAL; |
| |
| if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst)) |
| return -EOPNOTSUPP; |
| |
| if (src == dst) { |
| if (pos_in == pos_out) |
| return 0; |
| if (pos_out > pos_in && pos_out < pos_in + len) |
| return -EINVAL; |
| } |
| |
| inode_lock(src); |
| if (src != dst) { |
| ret = -EBUSY; |
| if (!inode_trylock(dst)) |
| goto out; |
| } |
| |
| ret = -EINVAL; |
| if (pos_in + len > src->i_size || pos_in + len < pos_in) |
| goto out_unlock; |
| if (len == 0) |
| olen = len = src->i_size - pos_in; |
| if (pos_in + len == src->i_size) |
| len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in; |
| if (len == 0) { |
| ret = 0; |
| goto out_unlock; |
| } |
| |
| dst_osize = dst->i_size; |
| if (pos_out + olen > dst->i_size) |
| dst_max_i_size = pos_out + olen; |
| |
| /* verify the end result is block aligned */ |
| if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) || |
| !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) || |
| !IS_ALIGNED(pos_out, F2FS_BLKSIZE)) |
| goto out_unlock; |
| |
| ret = f2fs_convert_inline_inode(src); |
| if (ret) |
| goto out_unlock; |
| |
| ret = f2fs_convert_inline_inode(dst); |
| if (ret) |
| goto out_unlock; |
| |
| /* write out all dirty pages from offset */ |
| ret = filemap_write_and_wait_range(src->i_mapping, |
| pos_in, pos_in + len); |
| if (ret) |
| goto out_unlock; |
| |
| ret = filemap_write_and_wait_range(dst->i_mapping, |
| pos_out, pos_out + len); |
| if (ret) |
| goto out_unlock; |
| |
| f2fs_balance_fs(sbi, true); |
| |
| down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]); |
| if (src != dst) { |
| ret = -EBUSY; |
| if (!down_write_trylock(&F2FS_I(dst)->i_gc_rwsem[WRITE])) |
| goto out_src; |
| } |
| |
| f2fs_lock_op(sbi); |
| ret = __exchange_data_block(src, dst, pos_in >> F2FS_BLKSIZE_BITS, |
| pos_out >> F2FS_BLKSIZE_BITS, |
| len >> F2FS_BLKSIZE_BITS, false); |
| |
| if (!ret) { |
| if (dst_max_i_size) |
| f2fs_i_size_write(dst, dst_max_i_size); |
| else if (dst_osize != dst->i_size) |
| f2fs_i_size_write(dst, dst_osize); |
| } |
| f2fs_unlock_op(sbi); |
| |
| if (src != dst) |
| up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]); |
| out_src: |
| up_write(&F2FS_I(src)->i_gc_rwsem[WRITE]); |
| out_unlock: |
| if (src != dst) |
| inode_unlock(dst); |
| out: |
| inode_unlock(src); |
| return ret; |
| } |
| |
| static int f2fs_ioc_move_range(struct file *filp, unsigned long arg) |
| { |
| struct f2fs_move_range range; |
| struct fd dst; |
| int err; |
| |
| if (!(filp->f_mode & FMODE_READ) || |
| !(filp->f_mode & FMODE_WRITE)) |
| return -EBADF; |
| |
| if (copy_from_user(&range, (struct f2fs_move_range __user *)arg, |
| sizeof(range))) |
| return -EFAULT; |
| |
| dst = fdget(range.dst_fd); |
| if (!dst.file) |
| return -EBADF; |
| |
| if (!(dst.file->f_mode & FMODE_WRITE)) { |
| err = -EBADF; |
| goto err_out; |
| } |
| |
| err = mnt_want_write_file(filp); |
| if (err) |
| goto err_out; |
| |
| err = f2fs_move_file_range(filp, range.pos_in, dst.file, |
| range.pos_out, range.len); |
| |
| mnt_drop_write_file(filp); |
| if (err) |
| goto err_out; |
| |
| if (copy_to_user((struct f2fs_move_range __user *)arg, |
| &range, sizeof(range))) |
| err = -EFAULT; |
| err_out: |
| fdput(dst); |
| return err; |
| } |
| |
| static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct sit_info *sm = SIT_I(sbi); |
| unsigned int start_segno = 0, end_segno = 0; |
| unsigned int dev_start_segno = 0, dev_end_segno = 0; |
| struct f2fs_flush_device range; |
| int ret; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (f2fs_readonly(sbi->sb)) |
| return -EROFS; |
| |
| if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg, |
| sizeof(range))) |
| return -EFAULT; |
| |
| if (!f2fs_is_multi_device(sbi) || sbi->s_ndevs - 1 <= range.dev_num || |
| sbi->segs_per_sec != 1) { |
| f2fs_msg(sbi->sb, KERN_WARNING, |
| "Can't flush %u in %d for segs_per_sec %u != 1\n", |
| range.dev_num, sbi->s_ndevs, |
| sbi->segs_per_sec); |
| return -EINVAL; |
| } |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| if (range.dev_num != 0) |
| dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk); |
| dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk); |
| |
| start_segno = sm->last_victim[FLUSH_DEVICE]; |
| if (start_segno < dev_start_segno || start_segno >= dev_end_segno) |
| start_segno = dev_start_segno; |
| end_segno = min(start_segno + range.segments, dev_end_segno); |
| |
| while (start_segno < end_segno) { |
| if (!mutex_trylock(&sbi->gc_mutex)) { |
| ret = -EBUSY; |
| goto out; |
| } |
| sm->last_victim[GC_CB] = end_segno + 1; |
| sm->last_victim[GC_GREEDY] = end_segno + 1; |
| sm->last_victim[ALLOC_NEXT] = end_segno + 1; |
| ret = f2fs_gc(sbi, true, true, start_segno); |
| if (ret == -EAGAIN) |
| ret = 0; |
| else if (ret < 0) |
| break; |
| start_segno++; |
| } |
| out: |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| static int f2fs_ioc_get_features(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature); |
| |
| /* Must validate to set it with SQLite behavior in Android. */ |
| sb_feature |= F2FS_FEATURE_ATOMIC_WRITE; |
| |
| return put_user(sb_feature, (u32 __user *)arg); |
| } |
| |
| #ifdef CONFIG_QUOTA |
| static int f2fs_ioc_setproject(struct file *filp, __u32 projid) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| struct super_block *sb = sbi->sb; |
| struct dquot *transfer_to[MAXQUOTAS] = {}; |
| struct page *ipage; |
| kprojid_t kprojid; |
| int err; |
| |
| if (!f2fs_sb_has_project_quota(sb)) { |
| if (projid != F2FS_DEF_PROJID) |
| return -EOPNOTSUPP; |
| else |
| return 0; |
| } |
| |
| if (!f2fs_has_extra_attr(inode)) |
| return -EOPNOTSUPP; |
| |
| kprojid = make_kprojid(&init_user_ns, (projid_t)projid); |
| |
| if (projid_eq(kprojid, F2FS_I(inode)->i_projid)) |
| return 0; |
| |
| err = -EPERM; |
| /* Is it quota file? Do not allow user to mess with it */ |
| if (IS_NOQUOTA(inode)) |
| return err; |
| |
| ipage = f2fs_get_node_page(sbi, inode->i_ino); |
| if (IS_ERR(ipage)) |
| return PTR_ERR(ipage); |
| |
| if (!F2FS_FITS_IN_INODE(F2FS_INODE(ipage), fi->i_extra_isize, |
| i_projid)) { |
| err = -EOVERFLOW; |
| f2fs_put_page(ipage, 1); |
| return err; |
| } |
| f2fs_put_page(ipage, 1); |
| |
| err = dquot_initialize(inode); |
| if (err) |
| return err; |
| |
| transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); |
| if (!IS_ERR(transfer_to[PRJQUOTA])) { |
| err = __dquot_transfer(inode, transfer_to); |
| dqput(transfer_to[PRJQUOTA]); |
| if (err) |
| goto out_dirty; |
| } |
| |
| F2FS_I(inode)->i_projid = kprojid; |
| inode->i_ctime = current_time(inode); |
| out_dirty: |
| f2fs_mark_inode_dirty_sync(inode, true); |
| return err; |
| } |
| #else |
| static int f2fs_ioc_setproject(struct file *filp, __u32 projid) |
| { |
| if (projid != F2FS_DEF_PROJID) |
| return -EOPNOTSUPP; |
| return 0; |
| } |
| #endif |
| |
| /* Transfer internal flags to xflags */ |
| static inline __u32 f2fs_iflags_to_xflags(unsigned long iflags) |
| { |
| __u32 xflags = 0; |
| |
| if (iflags & F2FS_SYNC_FL) |
| xflags |= FS_XFLAG_SYNC; |
| if (iflags & F2FS_IMMUTABLE_FL) |
| xflags |= FS_XFLAG_IMMUTABLE; |
| if (iflags & F2FS_APPEND_FL) |
| xflags |= FS_XFLAG_APPEND; |
| if (iflags & F2FS_NODUMP_FL) |
| xflags |= FS_XFLAG_NODUMP; |
| if (iflags & F2FS_NOATIME_FL) |
| xflags |= FS_XFLAG_NOATIME; |
| if (iflags & F2FS_PROJINHERIT_FL) |
| xflags |= FS_XFLAG_PROJINHERIT; |
| return xflags; |
| } |
| |
| #define F2FS_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ |
| FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ |
| FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT) |
| |
| /* Transfer xflags flags to internal */ |
| static inline unsigned long f2fs_xflags_to_iflags(__u32 xflags) |
| { |
| unsigned long iflags = 0; |
| |
| if (xflags & FS_XFLAG_SYNC) |
| iflags |= F2FS_SYNC_FL; |
| if (xflags & FS_XFLAG_IMMUTABLE) |
| iflags |= F2FS_IMMUTABLE_FL; |
| if (xflags & FS_XFLAG_APPEND) |
| iflags |= F2FS_APPEND_FL; |
| if (xflags & FS_XFLAG_NODUMP) |
| iflags |= F2FS_NODUMP_FL; |
| if (xflags & FS_XFLAG_NOATIME) |
| iflags |= F2FS_NOATIME_FL; |
| if (xflags & FS_XFLAG_PROJINHERIT) |
| iflags |= F2FS_PROJINHERIT_FL; |
| |
| return iflags; |
| } |
| |
| static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| struct fsxattr fa; |
| |
| memset(&fa, 0, sizeof(struct fsxattr)); |
| fa.fsx_xflags = f2fs_iflags_to_xflags(fi->i_flags & |
| F2FS_FL_USER_VISIBLE); |
| |
| if (f2fs_sb_has_project_quota(inode->i_sb)) |
| fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, |
| fi->i_projid); |
| |
| if (copy_to_user((struct fsxattr __user *)arg, &fa, sizeof(fa))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int f2fs_ioctl_check_project(struct inode *inode, struct fsxattr *fa) |
| { |
| /* |
| * Project Quota ID state is only allowed to change from within the init |
| * namespace. Enforce that restriction only if we are trying to change |
| * the quota ID state. Everything else is allowed in user namespaces. |
| */ |
| if (current_user_ns() == &init_user_ns) |
| return 0; |
| |
| if (__kprojid_val(F2FS_I(inode)->i_projid) != fa->fsx_projid) |
| return -EINVAL; |
| |
| if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL) { |
| if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT)) |
| return -EINVAL; |
| } else { |
| if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT) |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| struct fsxattr fa; |
| unsigned int flags; |
| int err; |
| |
| if (copy_from_user(&fa, (struct fsxattr __user *)arg, sizeof(fa))) |
| return -EFAULT; |
| |
| /* Make sure caller has proper permission */ |
| if (!inode_owner_or_capable(inode)) |
| return -EACCES; |
| |
| if (fa.fsx_xflags & ~F2FS_SUPPORTED_FS_XFLAGS) |
| return -EOPNOTSUPP; |
| |
| flags = f2fs_xflags_to_iflags(fa.fsx_xflags); |
| if (f2fs_mask_flags(inode->i_mode, flags) != flags) |
| return -EOPNOTSUPP; |
| |
| err = mnt_want_write_file(filp); |
| if (err) |
| return err; |
| |
| inode_lock(inode); |
| err = f2fs_ioctl_check_project(inode, &fa); |
| if (err) |
| goto out; |
| flags = (fi->i_flags & ~F2FS_FL_XFLAG_VISIBLE) | |
| (flags & F2FS_FL_XFLAG_VISIBLE); |
| err = __f2fs_ioc_setflags(inode, flags); |
| if (err) |
| goto out; |
| |
| err = f2fs_ioc_setproject(filp, fa.fsx_projid); |
| out: |
| inode_unlock(inode); |
| mnt_drop_write_file(filp); |
| return err; |
| } |
| |
| int f2fs_pin_file_control(struct inode *inode, bool inc) |
| { |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| |
| /* Use i_gc_failures for normal file as a risk signal. */ |
| if (inc) |
| f2fs_i_gc_failures_write(inode, |
| fi->i_gc_failures[GC_FAILURE_PIN] + 1); |
| |
| if (fi->i_gc_failures[GC_FAILURE_PIN] > sbi->gc_pin_file_threshold) { |
| f2fs_msg(sbi->sb, KERN_WARNING, |
| "%s: Enable GC = ino %lx after %x GC trials\n", |
| __func__, inode->i_ino, |
| fi->i_gc_failures[GC_FAILURE_PIN]); |
| clear_inode_flag(inode, FI_PIN_FILE); |
| return -EAGAIN; |
| } |
| return 0; |
| } |
| |
| static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| __u32 pin; |
| int ret = 0; |
| |
| if (!inode_owner_or_capable(inode)) |
| return -EACCES; |
| |
| if (get_user(pin, (__u32 __user *)arg)) |
| return -EFAULT; |
| |
| if (!S_ISREG(inode->i_mode)) |
| return -EINVAL; |
| |
| if (f2fs_readonly(F2FS_I_SB(inode)->sb)) |
| return -EROFS; |
| |
| ret = mnt_want_write_file(filp); |
| if (ret) |
| return ret; |
| |
| inode_lock(inode); |
| |
| if (f2fs_should_update_outplace(inode, NULL)) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (!pin) { |
| clear_inode_flag(inode, FI_PIN_FILE); |
| f2fs_i_gc_failures_write(inode, 0); |
| goto done; |
| } |
| |
| if (f2fs_pin_file_control(inode, false)) { |
| ret = -EAGAIN; |
| goto out; |
| } |
| ret = f2fs_convert_inline_inode(inode); |
| if (ret) |
| goto out; |
| |
| set_inode_flag(inode, FI_PIN_FILE); |
| ret = F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN]; |
| done: |
| f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| out: |
| inode_unlock(inode); |
| mnt_drop_write_file(filp); |
| return ret; |
| } |
| |
| static int f2fs_ioc_get_pin_file(struct file *filp, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| __u32 pin = 0; |
| |
| if (is_inode_flag_set(inode, FI_PIN_FILE)) |
| pin = F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN]; |
| return put_user(pin, (u32 __user *)arg); |
| } |
| |
| int f2fs_precache_extents(struct inode *inode) |
| { |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| struct f2fs_map_blocks map; |
| pgoff_t m_next_extent; |
| loff_t end; |
| int err; |
| |
| if (is_inode_flag_set(inode, FI_NO_EXTENT)) |
| return -EOPNOTSUPP; |
| |
| map.m_lblk = 0; |
| map.m_next_pgofs = NULL; |
| map.m_next_extent = &m_next_extent; |
| map.m_seg_type = NO_CHECK_TYPE; |
| end = F2FS_I_SB(inode)->max_file_blocks; |
| |
| while (map.m_lblk < end) { |
| map.m_len = end - map.m_lblk; |
| |
| down_write(&fi->i_gc_rwsem[WRITE]); |
| err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_PRECACHE); |
| up_write(&fi->i_gc_rwsem[WRITE]); |
| if (err) |
| return err; |
| |
| map.m_lblk = m_next_extent; |
| } |
| |
| return err; |
| } |
| |
| static int f2fs_ioc_precache_extents(struct file *filp, unsigned long arg) |
| { |
| return f2fs_precache_extents(file_inode(filp)); |
| } |
| |
| long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| { |
| if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp))))) |
| return -EIO; |
| |
| 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_GARBAGE_COLLECT_RANGE: |
| return f2fs_ioc_gc_range(filp, arg); |
| case F2FS_IOC_WRITE_CHECKPOINT: |
| return f2fs_ioc_write_checkpoint(filp, arg); |
| case F2FS_IOC_DEFRAGMENT: |
| return f2fs_ioc_defragment(filp, arg); |
| case F2FS_IOC_MOVE_RANGE: |
| return f2fs_ioc_move_range(filp, arg); |
| case F2FS_IOC_FLUSH_DEVICE: |
| return f2fs_ioc_flush_device(filp, arg); |
| case F2FS_IOC_GET_FEATURES: |
| return f2fs_ioc_get_features(filp, arg); |
| case F2FS_IOC_FSGETXATTR: |
| return f2fs_ioc_fsgetxattr(filp, arg); |
| case F2FS_IOC_FSSETXATTR: |
| return f2fs_ioc_fssetxattr(filp, arg); |
| case F2FS_IOC_GET_PIN_FILE: |
| return f2fs_ioc_get_pin_file(filp, arg); |
| case F2FS_IOC_SET_PIN_FILE: |
| return f2fs_ioc_set_pin_file(filp, arg); |
| case F2FS_IOC_PRECACHE_EXTENTS: |
| return f2fs_ioc_precache_extents(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 (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) |
| return -EIO; |
| |
| if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT)) |
| return -EINVAL; |
| |
| if (!inode_trylock(inode)) { |
| if (iocb->ki_flags & IOCB_NOWAIT) |
| return -EAGAIN; |
| inode_lock(inode); |
| } |
| |
| ret = generic_write_checks(iocb, from); |
| if (ret > 0) { |
| bool preallocated = false; |
| size_t target_size = 0; |
| int err; |
| |
| if (iov_iter_fault_in_readable(from, iov_iter_count(from))) |
| set_inode_flag(inode, FI_NO_PREALLOC); |
| |
| if ((iocb->ki_flags & IOCB_NOWAIT) && |
| (iocb->ki_flags & IOCB_DIRECT)) { |
| if (!f2fs_overwrite_io(inode, iocb->ki_pos, |
| iov_iter_count(from)) || |
| f2fs_has_inline_data(inode) || |
| f2fs_force_buffered_io(inode, WRITE)) { |
| clear_inode_flag(inode, |
| FI_NO_PREALLOC); |
| inode_unlock(inode); |
| return -EAGAIN; |
| } |
| |
| } else { |
| preallocated = true; |
| target_size = iocb->ki_pos + iov_iter_count(from); |
| |
| err = f2fs_preallocate_blocks(iocb, from); |
| if (err) { |
| clear_inode_flag(inode, FI_NO_PREALLOC); |
| inode_unlock(inode); |
| return err; |
| } |
| } |
| ret = __generic_file_write_iter(iocb, from); |
| clear_inode_flag(inode, FI_NO_PREALLOC); |
| |
| /* if we couldn't write data, we should deallocate blocks. */ |
| if (preallocated && i_size_read(inode) < target_size) |
| f2fs_truncate(inode); |
| |
| if (ret > 0) |
| f2fs_update_iostat(F2FS_I_SB(inode), APP_WRITE_IO, ret); |
| } |
| inode_unlock(inode); |
| |
| if (ret > 0) |
| ret = generic_write_sync(iocb, ret); |
| 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_GARBAGE_COLLECT_RANGE: |
| case F2FS_IOC_WRITE_CHECKPOINT: |
| case F2FS_IOC_DEFRAGMENT: |
| case F2FS_IOC_MOVE_RANGE: |
| case F2FS_IOC_FLUSH_DEVICE: |
| case F2FS_IOC_GET_FEATURES: |
| case F2FS_IOC_FSGETXATTR: |
| case F2FS_IOC_FSSETXATTR: |
| case F2FS_IOC_GET_PIN_FILE: |
| case F2FS_IOC_SET_PIN_FILE: |
| case F2FS_IOC_PRECACHE_EXTENTS: |
| 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, |
| .flush = f2fs_file_flush, |
| .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, |
| }; |
