diff options
Diffstat (limited to 'fs/f2fs/file.c')
| -rw-r--r-- | fs/f2fs/file.c | 5009 |
1 files changed, 5009 insertions, 0 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c new file mode 100644 index 0000000000..a631d706e1 --- /dev/null +++ b/fs/f2fs/file.c @@ -0,0 +1,5009 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * fs/f2fs/file.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + */ +#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 <linux/nls.h> +#include <linux/sched/signal.h> +#include <linux/fileattr.h> +#include <linux/fadvise.h> +#include <linux/iomap.h> + +#include "f2fs.h" +#include "node.h" +#include "segment.h" +#include "xattr.h" +#include "acl.h" +#include "gc.h" +#include "iostat.h" +#include <trace/events/f2fs.h> +#include <uapi/linux/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; + + ret = filemap_fault(vmf); + if (ret & VM_FAULT_LOCKED) + f2fs_update_iostat(F2FS_I_SB(inode), inode, + APP_MAPPED_READ_IO, F2FS_BLKSIZE); + + trace_f2fs_filemap_fault(inode, vmf->pgoff, (unsigned long)ret); + + 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; + bool need_alloc = true; + int err = 0; + + if (unlikely(IS_IMMUTABLE(inode))) + return VM_FAULT_SIGBUS; + + if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) + return VM_FAULT_SIGBUS; + + if (unlikely(f2fs_cp_error(sbi))) { + err = -EIO; + goto err; + } + + if (!f2fs_is_checkpoint_ready(sbi)) { + err = -ENOSPC; + goto err; + } + + err = f2fs_convert_inline_inode(inode); + if (err) + goto err; + +#ifdef CONFIG_F2FS_FS_COMPRESSION + if (f2fs_compressed_file(inode)) { + int ret = f2fs_is_compressed_cluster(inode, page->index); + + if (ret < 0) { + err = ret; + goto err; + } else if (ret) { + need_alloc = false; + } + } +#endif + /* should do out of any locked page */ + if (need_alloc) + f2fs_balance_fs(sbi, true); + + sb_start_pagefault(inode->i_sb); + + f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); + + file_update_time(vmf->vma->vm_file); + filemap_invalidate_lock_shared(inode->i_mapping); + 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; + } + + if (need_alloc) { + /* block allocation */ + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = f2fs_get_block_locked(&dn, page->index); + } + +#ifdef CONFIG_F2FS_FS_COMPRESSION + if (!need_alloc) { + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE); + f2fs_put_dnode(&dn); + } +#endif + if (err) { + unlock_page(page); + goto out_sem; + } + + f2fs_wait_on_page_writeback(page, DATA, false, true); + + /* wait for GCed page writeback via META_MAPPING */ + f2fs_wait_on_block_writeback(inode, dn.data_blkaddr); + + /* + * check to see if the page is mapped already (no holes) + */ + if (PageMappedToDisk(page)) + goto out_sem; + + /* 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); + + f2fs_update_iostat(sbi, inode, APP_MAPPED_IO, F2FS_BLKSIZE); + f2fs_update_time(sbi, REQ_TIME); + + trace_f2fs_vm_page_mkwrite(page, DATA); +out_sem: + filemap_invalidate_unlock_shared(inode->i_mapping); + + sb_end_pagefault(inode->i_sb); +err: + return vmf_fs_error(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; + + /* + * Make sure to get the non-deleted alias. The alias associated with + * the open file descriptor being fsync()'ed may be deleted already. + */ + dentry = d_find_alias(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 (f2fs_compressed_file(inode)) + cp_reason = CP_COMPRESSED; + 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; + + f2fs_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); + } + f2fs_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 || is_sbi_flag_set(sbi, SBI_CP_DISABLED)) { + 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; + } else { + /* + * for OPU case, during fsync(), node can be persisted before + * data when lower device doesn't support write barrier, result + * in data corruption after SPO. + * So for strict fsync mode, force to use atomic write semantics + * to keep write order in between data/node and last node to + * avoid potential data corruption. + */ + if (F2FS_OPTION(sbi).fsync_mode == + FSYNC_MODE_STRICT && !atomic) + atomic = true; + } +go_write: + /* + * Both of fdatasync() and fsync() are able to be recovered from + * sudden-power-off. + */ + f2fs_down_read(&F2FS_I(inode)->i_sem); + cp_reason = need_do_checkpoint(inode); + f2fs_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) || + (atomic && !test_opt(sbi, NOBARRIER) && f2fs_sb_has_blkzoned(sbi))) + 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); + 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 bool __found_offset(struct address_space *mapping, block_t blkaddr, + pgoff_t index, int whence) +{ + switch (whence) { + case SEEK_DATA: + if (__is_valid_data_blkaddr(blkaddr)) + return true; + if (blkaddr == NEW_ADDR && + xa_get_mark(&mapping->i_pages, index, PAGECACHE_TAG_DIRTY)) + 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; + 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)) { + if (whence == SEEK_HOLE) { + data_ofs = isize; + goto found; + } else if (whence == SEEK_DATA) { + data_ofs = offset; + goto found; + } + } + + pgofs = (pgoff_t)(offset >> PAGE_SHIFT); + + 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 = f2fs_data_blkaddr(&dn); + + if (__is_valid_data_blkaddr(blkaddr) && + !f2fs_is_valid_blkaddr(F2FS_I_SB(inode), + blkaddr, DATA_GENERIC_ENHANCE)) { + f2fs_put_dnode(&dn); + goto fail; + } + + if (__found_offset(file->f_mapping, blkaddr, + 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; + + if (f2fs_compressed_file(inode)) + maxbytes = max_file_blocks(inode) << F2FS_BLKSIZE_BITS; + + 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); + + if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) + return -EIO; + + if (!f2fs_is_compress_backend_ready(inode)) + return -EOPNOTSUPP; + + file_accessed(file); + vma->vm_ops = &f2fs_file_vm_ops; + + f2fs_down_read(&F2FS_I(inode)->i_sem); + set_inode_flag(inode, FI_MMAP_FILE); + f2fs_up_read(&F2FS_I(inode)->i_sem); + + return 0; +} + +static int f2fs_file_open(struct inode *inode, struct file *filp) +{ + int err = fscrypt_file_open(inode, filp); + + if (err) + return err; + + if (!f2fs_is_compress_backend_ready(inode)) + return -EOPNOTSUPP; + + err = fsverity_file_open(inode, filp); + if (err) + return err; + + filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC; + filp->f_mode |= FMODE_CAN_ODIRECT; + + 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; + bool compressed_cluster = false; + int cluster_index = 0, valid_blocks = 0; + int cluster_size = F2FS_I(dn->inode)->i_cluster_size; + bool released = !atomic_read(&F2FS_I(dn->inode)->i_compr_blocks); + + 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; + + /* Assumption: truncation starts with cluster */ + for (; count > 0; count--, addr++, dn->ofs_in_node++, cluster_index++) { + block_t blkaddr = le32_to_cpu(*addr); + + if (f2fs_compressed_file(dn->inode) && + !(cluster_index & (cluster_size - 1))) { + if (compressed_cluster) + f2fs_i_compr_blocks_update(dn->inode, + valid_blocks, false); + compressed_cluster = (blkaddr == COMPRESS_ADDR); + valid_blocks = 0; + } + + if (blkaddr == NULL_ADDR) + continue; + + dn->data_blkaddr = NULL_ADDR; + f2fs_set_data_blkaddr(dn); + + if (__is_valid_data_blkaddr(blkaddr)) { + if (!f2fs_is_valid_blkaddr(sbi, blkaddr, + DATA_GENERIC_ENHANCE)) + continue; + if (compressed_cluster) + valid_blocks++; + } + + if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page)) + clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN); + + f2fs_invalidate_blocks(sbi, blkaddr); + + if (!released || blkaddr != COMPRESS_ADDR) + nr_free++; + } + + if (compressed_cluster) + f2fs_i_compr_blocks_update(dn->inode, valid_blocks, false); + + 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_read_extent_cache_range(dn, fofs, 0, len); + f2fs_update_age_extent_cache_range(dn, fofs, 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); +} + +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, 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 && IS_ENCRYPTED(inode)); + if (!cache_only) + set_page_dirty(page); + f2fs_put_page(page, 1); + return 0; +} + +int f2fs_do_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 >= max_file_blocks(inode)) + 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_blocks(struct inode *inode, u64 from, bool lock) +{ + u64 free_from = from; + int err; + +#ifdef CONFIG_F2FS_FS_COMPRESSION + /* + * for compressed file, only support cluster size + * aligned truncation. + */ + if (f2fs_compressed_file(inode)) + free_from = round_up(from, + F2FS_I(inode)->i_cluster_size << PAGE_SHIFT); +#endif + + err = f2fs_do_truncate_blocks(inode, free_from, lock); + if (err) + return err; + +#ifdef CONFIG_F2FS_FS_COMPRESSION + /* + * For compressed file, after release compress blocks, don't allow write + * direct, but we should allow write direct after truncate to zero. + */ + if (f2fs_compressed_file(inode) && !free_from + && is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) + clear_inode_flag(inode, FI_COMPRESS_RELEASED); + + if (from != free_from) { + err = f2fs_truncate_partial_cluster(inode, from, lock); + if (err) + return err; + } +#endif + + return 0; +} + +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)) + return -EIO; + + err = f2fs_dquot_initialize(inode); + if (err) + return err; + + /* 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_set_ctime_current(inode); + f2fs_mark_inode_dirty_sync(inode, false); + return 0; +} + +static bool f2fs_force_buffered_io(struct inode *inode, int rw) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + + if (!fscrypt_dio_supported(inode)) + return true; + if (fsverity_active(inode)) + return true; + if (f2fs_compressed_file(inode)) + return true; + + /* disallow direct IO if any of devices has unaligned blksize */ + if (f2fs_is_multi_device(sbi) && !sbi->aligned_blksize) + return true; + /* + * for blkzoned device, fallback direct IO to buffered IO, so + * all IOs can be serialized by log-structured write. + */ + if (f2fs_sb_has_blkzoned(sbi) && (rw == WRITE)) + return true; + if (f2fs_lfs_mode(sbi) && rw == WRITE && F2FS_IO_ALIGNED(sbi)) + return true; + if (is_sbi_flag_set(sbi, SBI_CP_DISABLED)) + return true; + + return false; +} + +int f2fs_getattr(struct mnt_idmap *idmap, 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 = NULL; + unsigned int flags; + + if (f2fs_has_extra_attr(inode) && + f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)) && + 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; + } + + /* + * Return the DIO alignment restrictions if requested. We only return + * this information when requested, since on encrypted files it might + * take a fair bit of work to get if the file wasn't opened recently. + * + * f2fs sometimes supports DIO reads but not DIO writes. STATX_DIOALIGN + * cannot represent that, so in that case we report no DIO support. + */ + if ((request_mask & STATX_DIOALIGN) && S_ISREG(inode->i_mode)) { + unsigned int bsize = i_blocksize(inode); + + stat->result_mask |= STATX_DIOALIGN; + if (!f2fs_force_buffered_io(inode, WRITE)) { + stat->dio_mem_align = bsize; + stat->dio_offset_align = bsize; + } + } + + flags = fi->i_flags; + if (flags & F2FS_COMPR_FL) + stat->attributes |= STATX_ATTR_COMPRESSED; + if (flags & F2FS_APPEND_FL) + stat->attributes |= STATX_ATTR_APPEND; + if (IS_ENCRYPTED(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; + if (IS_VERITY(inode)) + stat->attributes |= STATX_ATTR_VERITY; + + stat->attributes_mask |= (STATX_ATTR_COMPRESSED | + STATX_ATTR_APPEND | + STATX_ATTR_ENCRYPTED | + STATX_ATTR_IMMUTABLE | + STATX_ATTR_NODUMP | + STATX_ATTR_VERITY); + + generic_fillattr(idmap, request_mask, 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 mnt_idmap *idmap, + struct inode *inode, const struct iattr *attr) +{ + unsigned int ia_valid = attr->ia_valid; + + i_uid_update(idmap, attr, inode); + i_gid_update(idmap, attr, inode); + if (ia_valid & ATTR_ATIME) + inode->i_atime = attr->ia_atime; + if (ia_valid & ATTR_MTIME) + inode->i_mtime = attr->ia_mtime; + if (ia_valid & ATTR_CTIME) + inode_set_ctime_to_ts(inode, attr->ia_ctime); + if (ia_valid & ATTR_MODE) { + umode_t mode = attr->ia_mode; + vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); + + if (!vfsgid_in_group_p(vfsgid) && + !capable_wrt_inode_uidgid(idmap, inode, CAP_FSETID)) + mode &= ~S_ISGID; + set_acl_inode(inode, mode); + } +} +#else +#define __setattr_copy setattr_copy +#endif + +int f2fs_setattr(struct mnt_idmap *idmap, 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; + + if (unlikely(IS_IMMUTABLE(inode))) + return -EPERM; + + if (unlikely(IS_APPEND(inode) && + (attr->ia_valid & (ATTR_MODE | ATTR_UID | + ATTR_GID | ATTR_TIMES_SET)))) + return -EPERM; + + if ((attr->ia_valid & ATTR_SIZE) && + !f2fs_is_compress_backend_ready(inode)) + return -EOPNOTSUPP; + + err = setattr_prepare(idmap, dentry, attr); + if (err) + return err; + + err = fscrypt_prepare_setattr(dentry, attr); + if (err) + return err; + + err = fsverity_prepare_setattr(dentry, attr); + if (err) + return err; + + if (is_quota_modification(idmap, inode, attr)) { + err = f2fs_dquot_initialize(inode); + if (err) + return err; + } + if (i_uid_needs_update(idmap, attr, inode) || + i_gid_needs_update(idmap, attr, inode)) { + f2fs_lock_op(F2FS_I_SB(inode)); + err = dquot_transfer(idmap, inode, attr); + if (err) { + set_sbi_flag(F2FS_I_SB(inode), + SBI_QUOTA_NEED_REPAIR); + f2fs_unlock_op(F2FS_I_SB(inode)); + return err; + } + /* + * update uid/gid under lock_op(), so that dquot and inode can + * be updated atomically. + */ + i_uid_update(idmap, attr, inode); + i_gid_update(idmap, attr, inode); + f2fs_mark_inode_dirty_sync(inode, true); + f2fs_unlock_op(F2FS_I_SB(inode)); + } + + if (attr->ia_valid & ATTR_SIZE) { + loff_t old_size = i_size_read(inode); + + if (attr->ia_size > MAX_INLINE_DATA(inode)) { + /* + * should convert inline inode before i_size_write to + * keep smaller than inline_data size with inline flag. + */ + err = f2fs_convert_inline_inode(inode); + if (err) + return err; + } + + f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + filemap_invalidate_lock(inode->i_mapping); + + truncate_setsize(inode, attr->ia_size); + + if (attr->ia_size <= old_size) + err = f2fs_truncate(inode); + /* + * do not trim all blocks after i_size if target size is + * larger than i_size. + */ + filemap_invalidate_unlock(inode->i_mapping); + f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + if (err) + return err; + + spin_lock(&F2FS_I(inode)->i_size_lock); + inode->i_mtime = inode_set_ctime_current(inode); + F2FS_I(inode)->last_disk_size = i_size_read(inode); + spin_unlock(&F2FS_I(inode)->i_size_lock); + } + + __setattr_copy(idmap, inode, attr); + + if (attr->ia_valid & ATTR_MODE) { + err = posix_acl_chmod(idmap, dentry, f2fs_get_inode_mode(inode)); + + if (is_inode_flag_set(inode, FI_ACL_MODE)) { + if (!err) + 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_inode_acl = f2fs_get_acl, + .set_acl = f2fs_set_acl, + .listxattr = f2fs_listxattr, + .fiemap = f2fs_fiemap, + .fileattr_get = f2fs_fileattr_get, + .fileattr_set = f2fs_fileattr_set, +}; + +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, 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 f2fs_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) { + 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; + + f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + filemap_invalidate_lock(inode->i_mapping); + + truncate_pagecache_range(inode, blk_start, blk_end - 1); + + f2fs_lock_op(sbi); + ret = f2fs_truncate_hole(inode, pg_start, pg_end); + f2fs_unlock_op(sbi); + + filemap_invalidate_unlock(inode->i_mapping); + f2fs_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(inode) - + 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 = f2fs_data_blkaddr(&dn); + + if (__is_valid_data_blkaddr(*blkaddr) && + !f2fs_is_valid_blkaddr(sbi, *blkaddr, + DATA_GENERIC_ENHANCE)) { + f2fs_put_dnode(&dn); + f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR); + return -EFSCORRUPTED; + } + + if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) { + + if (f2fs_lfs_mode(sbi)) { + f2fs_put_dnode(&dn); + return -EOPNOTSUPP; + } + + /* 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, false); + 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 = f2fs_data_blkaddr(&dn); + 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); + } + memcpy_page(pdst, 0, psrc, 0, PAGE_SIZE); + 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(src_inode), len); + + src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode), + array_size(olen, sizeof(block_t)), + GFP_NOFS); + if (!src_blkaddr) + return -ENOMEM; + + do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode), + array_size(olen, sizeof(int)), + GFP_NOFS); + 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 = DIV_ROUND_UP(i_size_read(inode), 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 */ + f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + filemap_invalidate_lock(inode->i_mapping); + + 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); + + filemap_invalidate_unlock(inode->i_mapping); + f2fs_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 */ + filemap_invalidate_lock(inode->i_mapping); + filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); + truncate_pagecache(inode, offset); + + new_size = i_size_read(inode) - len; + ret = f2fs_truncate_blocks(inode, new_size, true); + filemap_invalidate_unlock(inode->i_mapping); + 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 (f2fs_data_blkaddr(dn) == 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 = f2fs_data_blkaddr(dn); + /* + * 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) + continue; + + if (!f2fs_is_valid_blkaddr(sbi, dn->data_blkaddr, + DATA_GENERIC_ENHANCE)) { + ret = -EFSCORRUPTED; + f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR); + break; + } + + f2fs_invalidate_blocks(sbi, dn->data_blkaddr); + dn->data_blkaddr = NEW_ADDR; + f2fs_set_data_blkaddr(dn); + } + + f2fs_update_read_extent_cache_range(dn, start, 0, index - start); + f2fs_update_age_extent_cache_range(dn, start, 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; + + f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + filemap_invalidate_lock(mapping); + + 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); + filemap_invalidate_unlock(mapping); + f2fs_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); + filemap_invalidate_unlock(mapping); + f2fs_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); + struct address_space *mapping = inode->i_mapping; + 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); + + filemap_invalidate_lock(mapping); + ret = f2fs_truncate_blocks(inode, i_size_read(inode), true); + filemap_invalidate_unlock(mapping); + if (ret) + return ret; + + /* write out all dirty pages from offset */ + ret = filemap_write_and_wait_range(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 = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); + + /* avoid gc operation during block exchange */ + f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + filemap_invalidate_lock(mapping); + 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); + } + filemap_invalidate_unlock(mapping); + f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + + /* write out all moved pages, if possible */ + filemap_invalidate_lock(mapping); + filemap_write_and_wait_range(mapping, offset, LLONG_MAX); + truncate_pagecache(inode, offset); + filemap_invalidate_unlock(mapping); + + if (!ret) + f2fs_i_size_write(inode, new_size); + return ret; +} + +static int f2fs_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, + .m_may_create = true }; + struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO, + .init_gc_type = FG_GC, + .should_migrate_blocks = false, + .err_gc_skipped = true, + .nr_free_secs = 0 }; + pgoff_t pg_start, pg_end; + loff_t new_size; + loff_t off_end; + block_t expanded = 0; + 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_start = ((unsigned long long)offset) >> PAGE_SHIFT; + pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT; + off_end = (offset + len) & (PAGE_SIZE - 1); + + map.m_lblk = pg_start; + map.m_len = pg_end - pg_start; + if (off_end) + map.m_len++; + + if (!map.m_len) + return 0; + + if (f2fs_is_pinned_file(inode)) { + block_t sec_blks = CAP_BLKS_PER_SEC(sbi); + block_t sec_len = roundup(map.m_len, sec_blks); + + map.m_len = sec_blks; +next_alloc: + if (has_not_enough_free_secs(sbi, 0, + GET_SEC_FROM_SEG(sbi, overprovision_segments(sbi)))) { + f2fs_down_write(&sbi->gc_lock); + stat_inc_gc_call_count(sbi, FOREGROUND); + err = f2fs_gc(sbi, &gc_control); + if (err && err != -ENODATA) + goto out_err; + } + + f2fs_down_write(&sbi->pin_sem); + + f2fs_lock_op(sbi); + f2fs_allocate_new_section(sbi, CURSEG_COLD_DATA_PINNED, false); + f2fs_unlock_op(sbi); + + map.m_seg_type = CURSEG_COLD_DATA_PINNED; + err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRE_DIO); + file_dont_truncate(inode); + + f2fs_up_write(&sbi->pin_sem); + + expanded += map.m_len; + sec_len -= map.m_len; + map.m_lblk += map.m_len; + if (!err && sec_len) + goto next_alloc; + + map.m_len = expanded; + } else { + err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRE_AIO); + expanded = map.m_len; + } +out_err: + if (err) { + pgoff_t last_off; + + if (!expanded) + return err; + + last_off = pg_start + expanded - 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; + if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode))) + return -ENOSPC; + if (!f2fs_is_compress_backend_ready(inode)) + return -EOPNOTSUPP; + + /* f2fs only support ->fallocate for regular file */ + if (!S_ISREG(inode->i_mode)) + return -EINVAL; + + if (IS_ENCRYPTED(inode) && + (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) + return -EOPNOTSUPP; + + /* + * Pinned file should not support partial truncation since the block + * can be used by applications. + */ + if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) && + (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE | + FALLOC_FL_ZERO_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); + + ret = file_modified(file); + if (ret) + goto out; + + if (mode & FALLOC_FL_PUNCH_HOLE) { + if (offset >= inode->i_size) + goto out; + + ret = f2fs_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 = f2fs_expand_inode_data(inode, offset, len, mode); + } + + if (!ret) { + inode->i_mtime = inode_set_ctime_current(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_release_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; + + inode_lock(inode); + f2fs_abort_atomic_write(inode, true); + inode_unlock(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_I(inode)->atomic_write_task == current && + (current->flags & PF_EXITING)) { + inode_lock(inode); + f2fs_abort_atomic_write(inode, true); + inode_unlock(inode); + } + + return 0; +} + +static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask) +{ + struct f2fs_inode_info *fi = F2FS_I(inode); + u32 masked_flags = fi->i_flags & mask; + + /* mask can be shrunk by flags_valid selector */ + iflags &= mask; + + /* Is it quota file? Do not allow user to mess with it */ + if (IS_NOQUOTA(inode)) + return -EPERM; + + if ((iflags ^ masked_flags) & F2FS_CASEFOLD_FL) { + if (!f2fs_sb_has_casefold(F2FS_I_SB(inode))) + return -EOPNOTSUPP; + if (!f2fs_empty_dir(inode)) + return -ENOTEMPTY; + } + + if (iflags & (F2FS_COMPR_FL | F2FS_NOCOMP_FL)) { + if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) + return -EOPNOTSUPP; + if ((iflags & F2FS_COMPR_FL) && (iflags & F2FS_NOCOMP_FL)) + return -EINVAL; + } + + if ((iflags ^ masked_flags) & F2FS_COMPR_FL) { + if (masked_flags & F2FS_COMPR_FL) { + if (!f2fs_disable_compressed_file(inode)) + return -EINVAL; + } else { + /* try to convert inline_data to support compression */ + int err = f2fs_convert_inline_inode(inode); + if (err) + return err; + + f2fs_down_write(&F2FS_I(inode)->i_sem); + if (!f2fs_may_compress(inode) || + (S_ISREG(inode->i_mode) && + F2FS_HAS_BLOCKS(inode))) { + f2fs_up_write(&F2FS_I(inode)->i_sem); + return -EINVAL; + } + err = set_compress_context(inode); + f2fs_up_write(&F2FS_I(inode)->i_sem); + + if (err) + return err; + } + } + + fi->i_flags = iflags | (fi->i_flags & ~mask); + f2fs_bug_on(F2FS_I_SB(inode), (fi->i_flags & F2FS_COMPR_FL) && + (fi->i_flags & F2FS_NOCOMP_FL)); + + if (fi->i_flags & F2FS_PROJINHERIT_FL) + set_inode_flag(inode, FI_PROJ_INHERIT); + else + clear_inode_flag(inode, FI_PROJ_INHERIT); + + inode_set_ctime_current(inode); + f2fs_set_inode_flags(inode); + f2fs_mark_inode_dirty_sync(inode, true); + return 0; +} + +/* FS_IOC_[GS]ETFLAGS and FS_IOC_FS[GS]ETXATTR support */ + +/* + * To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry + * for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to + * F2FS_GETTABLE_FS_FL. To also make it settable via FS_IOC_SETFLAGS, also add + * its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL. + * + * Translating flags to fsx_flags value used by FS_IOC_FSGETXATTR and + * FS_IOC_FSSETXATTR is done by the VFS. + */ + +static const struct { + u32 iflag; + u32 fsflag; +} f2fs_fsflags_map[] = { + { F2FS_COMPR_FL, FS_COMPR_FL }, + { F2FS_SYNC_FL, FS_SYNC_FL }, + { F2FS_IMMUTABLE_FL, FS_IMMUTABLE_FL }, + { F2FS_APPEND_FL, FS_APPEND_FL }, + { F2FS_NODUMP_FL, FS_NODUMP_FL }, + { F2FS_NOATIME_FL, FS_NOATIME_FL }, + { F2FS_NOCOMP_FL, FS_NOCOMP_FL }, + { F2FS_INDEX_FL, FS_INDEX_FL }, + { F2FS_DIRSYNC_FL, FS_DIRSYNC_FL }, + { F2FS_PROJINHERIT_FL, FS_PROJINHERIT_FL }, + { F2FS_CASEFOLD_FL, FS_CASEFOLD_FL }, +}; + +#define F2FS_GETTABLE_FS_FL ( \ + FS_COMPR_FL | \ + FS_SYNC_FL | \ + FS_IMMUTABLE_FL | \ + FS_APPEND_FL | \ + FS_NODUMP_FL | \ + FS_NOATIME_FL | \ + FS_NOCOMP_FL | \ + FS_INDEX_FL | \ + FS_DIRSYNC_FL | \ + FS_PROJINHERIT_FL | \ + FS_ENCRYPT_FL | \ + FS_INLINE_DATA_FL | \ + FS_NOCOW_FL | \ + FS_VERITY_FL | \ + FS_CASEFOLD_FL) + +#define F2FS_SETTABLE_FS_FL ( \ + FS_COMPR_FL | \ + FS_SYNC_FL | \ + FS_IMMUTABLE_FL | \ + FS_APPEND_FL | \ + FS_NODUMP_FL | \ + FS_NOATIME_FL | \ + FS_NOCOMP_FL | \ + FS_DIRSYNC_FL | \ + FS_PROJINHERIT_FL | \ + FS_CASEFOLD_FL) + +/* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */ +static inline u32 f2fs_iflags_to_fsflags(u32 iflags) +{ + u32 fsflags = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++) + if (iflags & f2fs_fsflags_map[i].iflag) + fsflags |= f2fs_fsflags_map[i].fsflag; + + return fsflags; +} + +/* Convert FS_IOC_{GET,SET}FLAGS flags to f2fs on-disk i_flags */ +static inline u32 f2fs_fsflags_to_iflags(u32 fsflags) +{ + u32 iflags = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++) + if (fsflags & f2fs_fsflags_map[i].fsflag) + iflags |= f2fs_fsflags_map[i].iflag; + + return iflags; +} + +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, bool truncate) +{ + struct inode *inode = file_inode(filp); + struct mnt_idmap *idmap = file_mnt_idmap(filp); + struct f2fs_inode_info *fi = F2FS_I(inode); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct inode *pinode; + loff_t isize; + int ret; + + if (!inode_owner_or_capable(idmap, inode)) + return -EACCES; + + if (!S_ISREG(inode->i_mode)) + return -EINVAL; + + if (filp->f_flags & O_DIRECT) + return -EINVAL; + + ret = mnt_want_write_file(filp); + if (ret) + return ret; + + inode_lock(inode); + + if (!f2fs_disable_compressed_file(inode)) { + ret = -EINVAL; + goto out; + } + + if (f2fs_is_atomic_file(inode)) + goto out; + + ret = f2fs_convert_inline_inode(inode); + if (ret) + goto out; + + f2fs_down_write(&fi->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_warn(sbi, "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) { + f2fs_up_write(&fi->i_gc_rwsem[WRITE]); + goto out; + } + + /* Check if the inode already has a COW inode */ + if (fi->cow_inode == NULL) { + /* Create a COW inode for atomic write */ + pinode = f2fs_iget(inode->i_sb, fi->i_pino); + if (IS_ERR(pinode)) { + f2fs_up_write(&fi->i_gc_rwsem[WRITE]); + ret = PTR_ERR(pinode); + goto out; + } + + ret = f2fs_get_tmpfile(idmap, pinode, &fi->cow_inode); + iput(pinode); + if (ret) { + f2fs_up_write(&fi->i_gc_rwsem[WRITE]); + goto out; + } + + set_inode_flag(fi->cow_inode, FI_COW_FILE); + clear_inode_flag(fi->cow_inode, FI_INLINE_DATA); + } else { + /* Reuse the already created COW inode */ + ret = f2fs_do_truncate_blocks(fi->cow_inode, 0, true); + if (ret) { + f2fs_up_write(&fi->i_gc_rwsem[WRITE]); + goto out; + } + } + + f2fs_write_inode(inode, NULL); + + stat_inc_atomic_inode(inode); + + set_inode_flag(inode, FI_ATOMIC_FILE); + + isize = i_size_read(inode); + fi->original_i_size = isize; + if (truncate) { + set_inode_flag(inode, FI_ATOMIC_REPLACE); + truncate_inode_pages_final(inode->i_mapping); + f2fs_i_size_write(inode, 0); + isize = 0; + } + f2fs_i_size_write(fi->cow_inode, isize); + + f2fs_up_write(&fi->i_gc_rwsem[WRITE]); + + f2fs_update_time(sbi, REQ_TIME); + fi->atomic_write_task = current; + stat_update_max_atomic_write(inode); + fi->atomic_write_cnt = 0; +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); + struct mnt_idmap *idmap = file_mnt_idmap(filp); + int ret; + + if (!inode_owner_or_capable(idmap, 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_atomic_file(inode)) { + ret = f2fs_commit_atomic_write(inode); + if (!ret) + ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); + + f2fs_abort_atomic_write(inode, ret); + } else { + ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false); + } + + inode_unlock(inode); + mnt_drop_write_file(filp); + return ret; +} + +static int f2fs_ioc_abort_atomic_write(struct file *filp) +{ + struct inode *inode = file_inode(filp); + struct mnt_idmap *idmap = file_mnt_idmap(filp); + int ret; + + if (!inode_owner_or_capable(idmap, inode)) + return -EACCES; + + ret = mnt_want_write_file(filp); + if (ret) + return ret; + + inode_lock(inode); + + f2fs_abort_atomic_write(inode, true); + + 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) { + if (ret == -EROFS) { + ret = 0; + f2fs_stop_checkpoint(sbi, false, + STOP_CP_REASON_SHUTDOWN); + trace_f2fs_shutdown(sbi, in, ret); + } + return ret; + } + } + + switch (in) { + case F2FS_GOING_DOWN_FULLSYNC: + ret = freeze_bdev(sb->s_bdev); + if (ret) + goto out; + f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN); + thaw_bdev(sb->s_bdev); + break; + case F2FS_GOING_DOWN_METASYNC: + /* do checkpoint only */ + ret = f2fs_sync_fs(sb, 1); + if (ret) + goto out; + f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN); + break; + case F2FS_GOING_DOWN_NOSYNC: + f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN); + break; + case F2FS_GOING_DOWN_METAFLUSH: + f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO); + f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN); + break; + case F2FS_GOING_DOWN_NEED_FSCK: + set_sbi_flag(sbi, SBI_NEED_FSCK); + set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK); + set_sbi_flag(sbi, SBI_IS_DIRTY); + /* do checkpoint only */ + ret = f2fs_sync_fs(sb, 1); + goto out; + 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); + + trace_f2fs_shutdown(sbi, in, ret); + + 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 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, + bdev_discard_granularity(sb->s_bdev)); + 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(F2FS_I_SB(inode))) + 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(F2FS_I_SB(file_inode(filp)))) + 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); + u8 encrypt_pw_salt[16]; + int err; + + if (!f2fs_sb_has_encrypt(sbi)) + return -EOPNOTSUPP; + + err = mnt_want_write_file(filp); + if (err) + return err; + + f2fs_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: + memcpy(encrypt_pw_salt, sbi->raw_super->encrypt_pw_salt, 16); +out_err: + f2fs_up_write(&sbi->sb_lock); + mnt_drop_write_file(filp); + + if (!err && copy_to_user((__u8 __user *)arg, encrypt_pw_salt, 16)) + err = -EFAULT; + + return err; +} + +static int f2fs_ioc_get_encryption_policy_ex(struct file *filp, + unsigned long arg) +{ + if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) + return -EOPNOTSUPP; + + return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg); +} + +static int f2fs_ioc_add_encryption_key(struct file *filp, unsigned long arg) +{ + if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) + return -EOPNOTSUPP; + + return fscrypt_ioctl_add_key(filp, (void __user *)arg); +} + +static int f2fs_ioc_remove_encryption_key(struct file *filp, unsigned long arg) +{ + if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) + return -EOPNOTSUPP; + + return fscrypt_ioctl_remove_key(filp, (void __user *)arg); +} + +static int f2fs_ioc_remove_encryption_key_all_users(struct file *filp, + unsigned long arg) +{ + if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) + return -EOPNOTSUPP; + + return fscrypt_ioctl_remove_key_all_users(filp, (void __user *)arg); +} + +static int f2fs_ioc_get_encryption_key_status(struct file *filp, + unsigned long arg) +{ + if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) + return -EOPNOTSUPP; + + return fscrypt_ioctl_get_key_status(filp, (void __user *)arg); +} + +static int f2fs_ioc_get_encryption_nonce(struct file *filp, unsigned long arg) +{ + if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) + return -EOPNOTSUPP; + + return fscrypt_ioctl_get_nonce(filp, (void __user *)arg); +} + +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); + struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO, + .no_bg_gc = false, + .should_migrate_blocks = false, + .nr_free_secs = 0 }; + __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 (!f2fs_down_write_trylock(&sbi->gc_lock)) { + ret = -EBUSY; + goto out; + } + } else { + f2fs_down_write(&sbi->gc_lock); + } + + gc_control.init_gc_type = sync ? FG_GC : BG_GC; + gc_control.err_gc_skipped = sync; + stat_inc_gc_call_count(sbi, FOREGROUND); + ret = f2fs_gc(sbi, &gc_control); +out: + mnt_drop_write_file(filp); + return ret; +} + +static int __f2fs_ioc_gc_range(struct file *filp, struct f2fs_gc_range *range) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp)); + struct f2fs_gc_control gc_control = { + .init_gc_type = range->sync ? FG_GC : BG_GC, + .no_bg_gc = false, + .should_migrate_blocks = false, + .err_gc_skipped = range->sync, + .nr_free_secs = 0 }; + u64 end; + int ret; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + if (f2fs_readonly(sbi->sb)) + return -EROFS; + + end = range->start + range->len; + if (end < range->start || 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 (!f2fs_down_write_trylock(&sbi->gc_lock)) { + ret = -EBUSY; + goto out; + } + } else { + f2fs_down_write(&sbi->gc_lock); + } + + gc_control.victim_segno = GET_SEGNO(sbi, range->start); + stat_inc_gc_call_count(sbi, FOREGROUND); + ret = f2fs_gc(sbi, &gc_control); + if (ret) { + if (ret == -EBUSY) + ret = -EAGAIN; + goto out; + } + range->start += CAP_BLKS_PER_SEC(sbi); + if (range->start <= end) + goto do_more; +out: + mnt_drop_write_file(filp); + return ret; +} + +static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg) +{ + struct f2fs_gc_range range; + + if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg, + sizeof(range))) + return -EFAULT; + return __f2fs_ioc_gc_range(filp, &range); +} + +static int f2fs_ioc_write_checkpoint(struct file *filp) +{ + 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; + + if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { + f2fs_info(sbi, "Skipping Checkpoint. Checkpoints currently disabled."); + return -EINVAL; + } + + 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, + .m_may_create = false }; + struct extent_info ei = {}; + 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; + + pg_start = range->start >> PAGE_SHIFT; + pg_end = (range->start + range->len) >> PAGE_SHIFT; + + f2fs_balance_fs(sbi, true); + + inode_lock(inode); + + if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { + err = -EINVAL; + goto unlock_out; + } + + /* if in-place-update policy is enabled, don't waste time here */ + set_inode_flag(inode, FI_OPU_WRITE); + if (f2fs_should_update_inplace(inode, NULL)) { + err = -EINVAL; + goto out; + } + + /* 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_read_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, 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) { + total = 0; + goto out; + } + + sec_num = DIV_ROUND_UP(total, CAP_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, F2FS_GET_BLOCK_DEFAULT); + if (err) + goto clear_out; + + if (!(map.m_flags & F2FS_MAP_FLAGS)) { + map.m_lblk = next_pgofs; + goto check; + } + + set_inode_flag(inode, FI_SKIP_WRITES); + + 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); + set_page_private_gcing(page); + f2fs_put_page(page, 1); + + idx++; + cnt++; + total++; + } + + map.m_lblk = idx; +check: + if (map.m_lblk < pg_end && cnt < blk_per_seg) + goto do_map; + + clear_inode_flag(inode, FI_SKIP_WRITES); + + err = filemap_fdatawrite(inode->i_mapping); + if (err) + goto out; + } +clear_out: + clear_inode_flag(inode, FI_SKIP_WRITES); +out: + clear_inode_flag(inode, FI_OPU_WRITE); +unlock_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 > + max_file_blocks(inode))) + 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 (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst)) + return -EOPNOTSUPP; + + if (pos_out < 0 || pos_in < 0) + return -EINVAL; + + 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; + } + + if (f2fs_compressed_file(src) || f2fs_compressed_file(dst)) { + ret = -EOPNOTSUPP; + goto out_unlock; + } + + 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); + + f2fs_down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]); + if (src != dst) { + ret = -EBUSY; + if (!f2fs_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) + f2fs_up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]); +out_src: + f2fs_up_write(&F2FS_I(src)->i_gc_rwsem[WRITE]); + if (ret) + goto out_unlock; + + src->i_mtime = inode_set_ctime_current(src); + f2fs_mark_inode_dirty_sync(src, false); + if (src != dst) { + dst->i_mtime = inode_set_ctime_current(dst); + f2fs_mark_inode_dirty_sync(dst, false); + } + f2fs_update_time(sbi, REQ_TIME); + +out_unlock: + if (src != dst) + inode_unlock(dst); +out: + inode_unlock(src); + return ret; +} + +static int __f2fs_ioc_move_range(struct file *filp, + struct f2fs_move_range *range) +{ + struct fd dst; + int err; + + if (!(filp->f_mode & FMODE_READ) || + !(filp->f_mode & FMODE_WRITE)) + return -EBADF; + + 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); +err_out: + fdput(dst); + return err; +} + +static int f2fs_ioc_move_range(struct file *filp, unsigned long arg) +{ + struct f2fs_move_range range; + + if (copy_from_user(&range, (struct f2fs_move_range __user *)arg, + sizeof(range))) + return -EFAULT; + return __f2fs_ioc_move_range(filp, &range); +} + +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; + struct f2fs_gc_control gc_control = { + .init_gc_type = FG_GC, + .should_migrate_blocks = true, + .err_gc_skipped = true, + .nr_free_secs = 0 }; + int ret; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (f2fs_readonly(sbi->sb)) + return -EROFS; + + if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) + return -EINVAL; + + 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 || + __is_large_section(sbi)) { + f2fs_warn(sbi, "Can't flush %u in %d for segs_per_sec %u != 1", + 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 (!f2fs_down_write_trylock(&sbi->gc_lock)) { + 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; + + gc_control.victim_segno = start_segno; + stat_inc_gc_call_count(sbi, FOREGROUND); + ret = f2fs_gc(sbi, &gc_control); + 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 +int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid) +{ + struct dquot *transfer_to[MAXQUOTAS] = {}; + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct super_block *sb = sbi->sb; + int err; + + transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); + if (IS_ERR(transfer_to[PRJQUOTA])) + return PTR_ERR(transfer_to[PRJQUOTA]); + + err = __dquot_transfer(inode, transfer_to); + if (err) + set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR); + dqput(transfer_to[PRJQUOTA]); + return err; +} + +static int f2fs_ioc_setproject(struct inode *inode, __u32 projid) +{ + struct f2fs_inode_info *fi = F2FS_I(inode); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_inode *ri = NULL; + kprojid_t kprojid; + int err; + + if (!f2fs_sb_has_project_quota(sbi)) { + 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, fi->i_projid)) + return 0; + + err = -EPERM; + /* Is it quota file? Do not allow user to mess with it */ + if (IS_NOQUOTA(inode)) + return err; + + if (!F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid)) + return -EOVERFLOW; + + err = f2fs_dquot_initialize(inode); + if (err) + return err; + + f2fs_lock_op(sbi); + err = f2fs_transfer_project_quota(inode, kprojid); + if (err) + goto out_unlock; + + fi->i_projid = kprojid; + inode_set_ctime_current(inode); + f2fs_mark_inode_dirty_sync(inode, true); +out_unlock: + f2fs_unlock_op(sbi); + return err; +} +#else +int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid) +{ + return 0; +} + +static int f2fs_ioc_setproject(struct inode *inode, __u32 projid) +{ + if (projid != F2FS_DEF_PROJID) + return -EOPNOTSUPP; + return 0; +} +#endif + +int f2fs_fileattr_get(struct dentry *dentry, struct fileattr *fa) +{ + struct inode *inode = d_inode(dentry); + struct f2fs_inode_info *fi = F2FS_I(inode); + u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags); + + if (IS_ENCRYPTED(inode)) + fsflags |= FS_ENCRYPT_FL; + if (IS_VERITY(inode)) + fsflags |= FS_VERITY_FL; + if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) + fsflags |= FS_INLINE_DATA_FL; + if (is_inode_flag_set(inode, FI_PIN_FILE)) + fsflags |= FS_NOCOW_FL; + + fileattr_fill_flags(fa, fsflags & F2FS_GETTABLE_FS_FL); + + if (f2fs_sb_has_project_quota(F2FS_I_SB(inode))) + fa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid); + + return 0; +} + +int f2fs_fileattr_set(struct mnt_idmap *idmap, + struct dentry *dentry, struct fileattr *fa) +{ + struct inode *inode = d_inode(dentry); + u32 fsflags = fa->flags, mask = F2FS_SETTABLE_FS_FL; + u32 iflags; + int err; + + if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) + return -EIO; + if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode))) + return -ENOSPC; + if (fsflags & ~F2FS_GETTABLE_FS_FL) + return -EOPNOTSUPP; + fsflags &= F2FS_SETTABLE_FS_FL; + if (!fa->flags_valid) + mask &= FS_COMMON_FL; + + iflags = f2fs_fsflags_to_iflags(fsflags); + if (f2fs_mask_flags(inode->i_mode, iflags) != iflags) + return -EOPNOTSUPP; + + err = f2fs_setflags_common(inode, iflags, f2fs_fsflags_to_iflags(mask)); + if (!err) + err = f2fs_ioc_setproject(inode, fa->fsx_projid); + + 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_warn(sbi, "%s: Enable GC = ino %lx after %x GC trials", + __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 (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 (!pin) { + clear_inode_flag(inode, FI_PIN_FILE); + f2fs_i_gc_failures_write(inode, 0); + goto done; + } + + if (f2fs_should_update_outplace(inode, NULL)) { + ret = -EINVAL; + goto out; + } + + if (f2fs_pin_file_control(inode, false)) { + ret = -EAGAIN; + goto out; + } + + ret = f2fs_convert_inline_inode(inode); + if (ret) + goto out; + + if (!f2fs_disable_compressed_file(inode)) { + ret = -EOPNOTSUPP; + 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_pblk = 0; + map.m_next_pgofs = NULL; + map.m_next_extent = &m_next_extent; + map.m_seg_type = NO_CHECK_TYPE; + map.m_may_create = false; + end = max_file_blocks(inode); + + while (map.m_lblk < end) { + map.m_len = end - map.m_lblk; + + f2fs_down_write(&fi->i_gc_rwsem[WRITE]); + err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE); + f2fs_up_write(&fi->i_gc_rwsem[WRITE]); + if (err) + return err; + + map.m_lblk = m_next_extent; + } + + return 0; +} + +static int f2fs_ioc_precache_extents(struct file *filp) +{ + return f2fs_precache_extents(file_inode(filp)); +} + +static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp)); + __u64 block_count; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (f2fs_readonly(sbi->sb)) + return -EROFS; + + if (copy_from_user(&block_count, (void __user *)arg, + sizeof(block_count))) + return -EFAULT; + + return f2fs_resize_fs(filp, block_count); +} + +static int f2fs_ioc_enable_verity(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + + f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); + + if (!f2fs_sb_has_verity(F2FS_I_SB(inode))) { + f2fs_warn(F2FS_I_SB(inode), + "Can't enable fs-verity on inode %lu: the verity feature is not enabled on this filesystem", + inode->i_ino); + return -EOPNOTSUPP; + } + + return fsverity_ioctl_enable(filp, (const void __user *)arg); +} + +static int f2fs_ioc_measure_verity(struct file *filp, unsigned long arg) +{ + if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp)))) + return -EOPNOTSUPP; + + return fsverity_ioctl_measure(filp, (void __user *)arg); +} + +static int f2fs_ioc_read_verity_metadata(struct file *filp, unsigned long arg) +{ + if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp)))) + return -EOPNOTSUPP; + + return fsverity_ioctl_read_metadata(filp, (const void __user *)arg); +} + +static int f2fs_ioc_getfslabel(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + char *vbuf; + int count; + int err = 0; + + vbuf = f2fs_kzalloc(sbi, MAX_VOLUME_NAME, GFP_KERNEL); + if (!vbuf) + return -ENOMEM; + + f2fs_down_read(&sbi->sb_lock); + count = utf16s_to_utf8s(sbi->raw_super->volume_name, + ARRAY_SIZE(sbi->raw_super->volume_name), + UTF16_LITTLE_ENDIAN, vbuf, MAX_VOLUME_NAME); + f2fs_up_read(&sbi->sb_lock); + + if (copy_to_user((char __user *)arg, vbuf, + min(FSLABEL_MAX, count))) + err = -EFAULT; + + kfree(vbuf); + return err; +} + +static int f2fs_ioc_setfslabel(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + char *vbuf; + int err = 0; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + vbuf = strndup_user((const char __user *)arg, FSLABEL_MAX); + if (IS_ERR(vbuf)) + return PTR_ERR(vbuf); + + err = mnt_want_write_file(filp); + if (err) + goto out; + + f2fs_down_write(&sbi->sb_lock); + + memset(sbi->raw_super->volume_name, 0, + sizeof(sbi->raw_super->volume_name)); + utf8s_to_utf16s(vbuf, strlen(vbuf), UTF16_LITTLE_ENDIAN, + sbi->raw_super->volume_name, + ARRAY_SIZE(sbi->raw_super->volume_name)); + + err = f2fs_commit_super(sbi, false); + + f2fs_up_write(&sbi->sb_lock); + + mnt_drop_write_file(filp); +out: + kfree(vbuf); + return err; +} + +static int f2fs_get_compress_blocks(struct inode *inode, __u64 *blocks) +{ + if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) + return -EOPNOTSUPP; + + if (!f2fs_compressed_file(inode)) + return -EINVAL; + + *blocks = atomic_read(&F2FS_I(inode)->i_compr_blocks); + + return 0; +} + +static int f2fs_ioc_get_compress_blocks(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + __u64 blocks; + int ret; + + ret = f2fs_get_compress_blocks(inode, &blocks); + if (ret < 0) + return ret; + + return put_user(blocks, (u64 __user *)arg); +} + +static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); + unsigned int released_blocks = 0; + int cluster_size = F2FS_I(dn->inode)->i_cluster_size; + block_t blkaddr; + int i; + + for (i = 0; i < count; i++) { + blkaddr = data_blkaddr(dn->inode, dn->node_page, + dn->ofs_in_node + i); + + if (!__is_valid_data_blkaddr(blkaddr)) + continue; + if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr, + DATA_GENERIC_ENHANCE))) { + f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR); + return -EFSCORRUPTED; + } + } + + while (count) { + int compr_blocks = 0; + + for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) { + blkaddr = f2fs_data_blkaddr(dn); + + if (i == 0) { + if (blkaddr == COMPRESS_ADDR) + continue; + dn->ofs_in_node += cluster_size; + goto next; + } + + if (__is_valid_data_blkaddr(blkaddr)) + compr_blocks++; + + if (blkaddr != NEW_ADDR) + continue; + + dn->data_blkaddr = NULL_ADDR; + f2fs_set_data_blkaddr(dn); + } + + f2fs_i_compr_blocks_update(dn->inode, compr_blocks, false); + dec_valid_block_count(sbi, dn->inode, + cluster_size - compr_blocks); + + released_blocks += cluster_size - compr_blocks; +next: + count -= cluster_size; + } + + return released_blocks; +} + +static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + pgoff_t page_idx = 0, last_idx; + unsigned int released_blocks = 0; + int ret; + int writecount; + + if (!f2fs_sb_has_compression(sbi)) + return -EOPNOTSUPP; + + if (!f2fs_compressed_file(inode)) + return -EINVAL; + + if (f2fs_readonly(sbi->sb)) + return -EROFS; + + ret = mnt_want_write_file(filp); + if (ret) + return ret; + + f2fs_balance_fs(sbi, true); + + inode_lock(inode); + + writecount = atomic_read(&inode->i_writecount); + if ((filp->f_mode & FMODE_WRITE && writecount != 1) || + (!(filp->f_mode & FMODE_WRITE) && writecount)) { + ret = -EBUSY; + goto out; + } + + if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { + ret = -EINVAL; + goto out; + } + + ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); + if (ret) + goto out; + + if (!atomic_read(&F2FS_I(inode)->i_compr_blocks)) { + ret = -EPERM; + goto out; + } + + set_inode_flag(inode, FI_COMPRESS_RELEASED); + inode_set_ctime_current(inode); + f2fs_mark_inode_dirty_sync(inode, true); + + f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + filemap_invalidate_lock(inode->i_mapping); + + last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); + + while (page_idx < last_idx) { + struct dnode_of_data dn; + pgoff_t end_offset, count; + + set_new_dnode(&dn, inode, NULL, NULL, 0); + ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE); + if (ret) { + if (ret == -ENOENT) { + page_idx = f2fs_get_next_page_offset(&dn, + page_idx); + ret = 0; + continue; + } + break; + } + + end_offset = ADDRS_PER_PAGE(dn.node_page, inode); + count = min(end_offset - dn.ofs_in_node, last_idx - page_idx); + count = round_up(count, F2FS_I(inode)->i_cluster_size); + + ret = release_compress_blocks(&dn, count); + + f2fs_put_dnode(&dn); + + if (ret < 0) + break; + + page_idx += count; + released_blocks += ret; + } + + filemap_invalidate_unlock(inode->i_mapping); + f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); +out: + inode_unlock(inode); + + mnt_drop_write_file(filp); + + if (ret >= 0) { + ret = put_user(released_blocks, (u64 __user *)arg); + } else if (released_blocks && + atomic_read(&F2FS_I(inode)->i_compr_blocks)) { + set_sbi_flag(sbi, SBI_NEED_FSCK); + f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx " + "iblocks=%llu, released=%u, compr_blocks=%u, " + "run fsck to fix.", + __func__, inode->i_ino, inode->i_blocks, + released_blocks, + atomic_read(&F2FS_I(inode)->i_compr_blocks)); + } + + return ret; +} + +static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); + unsigned int reserved_blocks = 0; + int cluster_size = F2FS_I(dn->inode)->i_cluster_size; + block_t blkaddr; + int i; + + for (i = 0; i < count; i++) { + blkaddr = data_blkaddr(dn->inode, dn->node_page, + dn->ofs_in_node + i); + + if (!__is_valid_data_blkaddr(blkaddr)) + continue; + if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr, + DATA_GENERIC_ENHANCE))) { + f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR); + return -EFSCORRUPTED; + } + } + + while (count) { + int compr_blocks = 0; + blkcnt_t reserved; + int ret; + + for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) { + blkaddr = f2fs_data_blkaddr(dn); + + if (i == 0) { + if (blkaddr == COMPRESS_ADDR) + continue; + dn->ofs_in_node += cluster_size; + goto next; + } + + if (__is_valid_data_blkaddr(blkaddr)) { + compr_blocks++; + continue; + } + + dn->data_blkaddr = NEW_ADDR; + f2fs_set_data_blkaddr(dn); + } + + reserved = cluster_size - compr_blocks; + ret = inc_valid_block_count(sbi, dn->inode, &reserved); + if (ret) + return ret; + + if (reserved != cluster_size - compr_blocks) + return -ENOSPC; + + f2fs_i_compr_blocks_update(dn->inode, compr_blocks, true); + + reserved_blocks += reserved; +next: + count -= cluster_size; + } + + return reserved_blocks; +} + +static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + pgoff_t page_idx = 0, last_idx; + unsigned int reserved_blocks = 0; + int ret; + + if (!f2fs_sb_has_compression(sbi)) + return -EOPNOTSUPP; + + if (!f2fs_compressed_file(inode)) + return -EINVAL; + + if (f2fs_readonly(sbi->sb)) + return -EROFS; + + ret = mnt_want_write_file(filp); + if (ret) + return ret; + + if (atomic_read(&F2FS_I(inode)->i_compr_blocks)) + goto out; + + f2fs_balance_fs(sbi, true); + + inode_lock(inode); + + if (!is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { + ret = -EINVAL; + goto unlock_inode; + } + + f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + filemap_invalidate_lock(inode->i_mapping); + + last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); + + while (page_idx < last_idx) { + struct dnode_of_data dn; + pgoff_t end_offset, count; + + set_new_dnode(&dn, inode, NULL, NULL, 0); + ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE); + if (ret) { + if (ret == -ENOENT) { + page_idx = f2fs_get_next_page_offset(&dn, + page_idx); + ret = 0; + continue; + } + break; + } + + end_offset = ADDRS_PER_PAGE(dn.node_page, inode); + count = min(end_offset - dn.ofs_in_node, last_idx - page_idx); + count = round_up(count, F2FS_I(inode)->i_cluster_size); + + ret = reserve_compress_blocks(&dn, count); + + f2fs_put_dnode(&dn); + + if (ret < 0) + break; + + page_idx += count; + reserved_blocks += ret; + } + + filemap_invalidate_unlock(inode->i_mapping); + f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + + if (ret >= 0) { + clear_inode_flag(inode, FI_COMPRESS_RELEASED); + inode_set_ctime_current(inode); + f2fs_mark_inode_dirty_sync(inode, true); + } +unlock_inode: + inode_unlock(inode); +out: + mnt_drop_write_file(filp); + + if (ret >= 0) { + ret = put_user(reserved_blocks, (u64 __user *)arg); + } else if (reserved_blocks && + atomic_read(&F2FS_I(inode)->i_compr_blocks)) { + set_sbi_flag(sbi, SBI_NEED_FSCK); + f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx " + "iblocks=%llu, reserved=%u, compr_blocks=%u, " + "run fsck to fix.", + __func__, inode->i_ino, inode->i_blocks, + reserved_blocks, + atomic_read(&F2FS_I(inode)->i_compr_blocks)); + } + + return ret; +} + +static int f2fs_secure_erase(struct block_device *bdev, struct inode *inode, + pgoff_t off, block_t block, block_t len, u32 flags) +{ + sector_t sector = SECTOR_FROM_BLOCK(block); + sector_t nr_sects = SECTOR_FROM_BLOCK(len); + int ret = 0; + + if (flags & F2FS_TRIM_FILE_DISCARD) { + if (bdev_max_secure_erase_sectors(bdev)) + ret = blkdev_issue_secure_erase(bdev, sector, nr_sects, + GFP_NOFS); + else + ret = blkdev_issue_discard(bdev, sector, nr_sects, + GFP_NOFS); + } + + if (!ret && (flags & F2FS_TRIM_FILE_ZEROOUT)) { + if (IS_ENCRYPTED(inode)) + ret = fscrypt_zeroout_range(inode, off, block, len); + else + ret = blkdev_issue_zeroout(bdev, sector, nr_sects, + GFP_NOFS, 0); + } + + return ret; +} + +static int f2fs_sec_trim_file(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct address_space *mapping = inode->i_mapping; + struct block_device *prev_bdev = NULL; + struct f2fs_sectrim_range range; + pgoff_t index, pg_end, prev_index = 0; + block_t prev_block = 0, len = 0; + loff_t end_addr; + bool to_end = false; + int ret = 0; + + if (!(filp->f_mode & FMODE_WRITE)) + return -EBADF; + + if (copy_from_user(&range, (struct f2fs_sectrim_range __user *)arg, + sizeof(range))) + return -EFAULT; + + if (range.flags == 0 || (range.flags & ~F2FS_TRIM_FILE_MASK) || + !S_ISREG(inode->i_mode)) + return -EINVAL; + + if (((range.flags & F2FS_TRIM_FILE_DISCARD) && + !f2fs_hw_support_discard(sbi)) || + ((range.flags & F2FS_TRIM_FILE_ZEROOUT) && + IS_ENCRYPTED(inode) && f2fs_is_multi_device(sbi))) + return -EOPNOTSUPP; + + file_start_write(filp); + inode_lock(inode); + + if (f2fs_is_atomic_file(inode) || f2fs_compressed_file(inode) || + range.start >= inode->i_size) { + ret = -EINVAL; + goto err; + } + + if (range.len == 0) + goto err; + + if (inode->i_size - range.start > range.len) { + end_addr = range.start + range.len; + } else { + end_addr = range.len == (u64)-1 ? + sbi->sb->s_maxbytes : inode->i_size; + to_end = true; + } + + if (!IS_ALIGNED(range.start, F2FS_BLKSIZE) || + (!to_end && !IS_ALIGNED(end_addr, F2FS_BLKSIZE))) { + ret = -EINVAL; + goto err; + } + + index = F2FS_BYTES_TO_BLK(range.start); + pg_end = DIV_ROUND_UP(end_addr, F2FS_BLKSIZE); + + ret = f2fs_convert_inline_inode(inode); + if (ret) + goto err; + + f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + filemap_invalidate_lock(mapping); + + ret = filemap_write_and_wait_range(mapping, range.start, + to_end ? LLONG_MAX : end_addr - 1); + if (ret) + goto out; + + truncate_inode_pages_range(mapping, range.start, + to_end ? -1 : end_addr - 1); + + while (index < pg_end) { + struct dnode_of_data dn; + pgoff_t end_offset, count; + int i; + + set_new_dnode(&dn, inode, NULL, NULL, 0); + ret = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); + if (ret) { + if (ret == -ENOENT) { + index = f2fs_get_next_page_offset(&dn, index); + continue; + } + goto out; + } + + end_offset = ADDRS_PER_PAGE(dn.node_page, inode); + count = min(end_offset - dn.ofs_in_node, pg_end - index); + for (i = 0; i < count; i++, index++, dn.ofs_in_node++) { + struct block_device *cur_bdev; + block_t blkaddr = f2fs_data_blkaddr(&dn); + + if (!__is_valid_data_blkaddr(blkaddr)) + continue; + + if (!f2fs_is_valid_blkaddr(sbi, blkaddr, + DATA_GENERIC_ENHANCE)) { + ret = -EFSCORRUPTED; + f2fs_put_dnode(&dn); + f2fs_handle_error(sbi, + ERROR_INVALID_BLKADDR); + goto out; + } + + cur_bdev = f2fs_target_device(sbi, blkaddr, NULL); + if (f2fs_is_multi_device(sbi)) { + int di = f2fs_target_device_index(sbi, blkaddr); + + blkaddr -= FDEV(di).start_blk; + } + + if (len) { + if (prev_bdev == cur_bdev && + index == prev_index + len && + blkaddr == prev_block + len) { + len++; + } else { + ret = f2fs_secure_erase(prev_bdev, + inode, prev_index, prev_block, + len, range.flags); + if (ret) { + f2fs_put_dnode(&dn); + goto out; + } + + len = 0; + } + } + + if (!len) { + prev_bdev = cur_bdev; + prev_index = index; + prev_block = blkaddr; + len = 1; + } + } + + f2fs_put_dnode(&dn); + + if (fatal_signal_pending(current)) { + ret = -EINTR; + goto out; + } + cond_resched(); + } + + if (len) + ret = f2fs_secure_erase(prev_bdev, inode, prev_index, + prev_block, len, range.flags); +out: + filemap_invalidate_unlock(mapping); + f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); +err: + inode_unlock(inode); + file_end_write(filp); + + return ret; +} + +static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_comp_option option; + + if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) + return -EOPNOTSUPP; + + inode_lock_shared(inode); + + if (!f2fs_compressed_file(inode)) { + inode_unlock_shared(inode); + return -ENODATA; + } + + option.algorithm = F2FS_I(inode)->i_compress_algorithm; + option.log_cluster_size = F2FS_I(inode)->i_log_cluster_size; + + inode_unlock_shared(inode); + + if (copy_to_user((struct f2fs_comp_option __user *)arg, &option, + sizeof(option))) + return -EFAULT; + + return 0; +} + +static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_comp_option option; + int ret = 0; + + if (!f2fs_sb_has_compression(sbi)) + return -EOPNOTSUPP; + + if (!(filp->f_mode & FMODE_WRITE)) + return -EBADF; + + if (copy_from_user(&option, (struct f2fs_comp_option __user *)arg, + sizeof(option))) + return -EFAULT; + + if (!f2fs_compressed_file(inode) || + option.log_cluster_size < MIN_COMPRESS_LOG_SIZE || + option.log_cluster_size > MAX_COMPRESS_LOG_SIZE || + option.algorithm >= COMPRESS_MAX) + return -EINVAL; + + file_start_write(filp); + inode_lock(inode); + + f2fs_down_write(&F2FS_I(inode)->i_sem); + if (f2fs_is_mmap_file(inode) || get_dirty_pages(inode)) { + ret = -EBUSY; + goto out; + } + + if (F2FS_HAS_BLOCKS(inode)) { + ret = -EFBIG; + goto out; + } + + F2FS_I(inode)->i_compress_algorithm = option.algorithm; + F2FS_I(inode)->i_log_cluster_size = option.log_cluster_size; + F2FS_I(inode)->i_cluster_size = BIT(option.log_cluster_size); + /* Set default level */ + if (F2FS_I(inode)->i_compress_algorithm == COMPRESS_ZSTD) + F2FS_I(inode)->i_compress_level = F2FS_ZSTD_DEFAULT_CLEVEL; + else + F2FS_I(inode)->i_compress_level = 0; + /* Adjust mount option level */ + if (option.algorithm == F2FS_OPTION(sbi).compress_algorithm && + F2FS_OPTION(sbi).compress_level) + F2FS_I(inode)->i_compress_level = F2FS_OPTION(sbi).compress_level; + f2fs_mark_inode_dirty_sync(inode, true); + + if (!f2fs_is_compress_backend_ready(inode)) + f2fs_warn(sbi, "compression algorithm is successfully set, " + "but current kernel doesn't support this algorithm."); +out: + f2fs_up_write(&F2FS_I(inode)->i_sem); + inode_unlock(inode); + file_end_write(filp); + + return ret; +} + +static int redirty_blocks(struct inode *inode, pgoff_t page_idx, int len) +{ + DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, page_idx); + struct address_space *mapping = inode->i_mapping; + struct page *page; + pgoff_t redirty_idx = page_idx; + int i, page_len = 0, ret = 0; + + page_cache_ra_unbounded(&ractl, len, 0); + + for (i = 0; i < len; i++, page_idx++) { + page = read_cache_page(mapping, page_idx, NULL, NULL); + if (IS_ERR(page)) { + ret = PTR_ERR(page); + break; + } + page_len++; + } + + for (i = 0; i < page_len; i++, redirty_idx++) { + page = find_lock_page(mapping, redirty_idx); + + /* It will never fail, when page has pinned above */ + f2fs_bug_on(F2FS_I_SB(inode), !page); + + set_page_dirty(page); + f2fs_put_page(page, 1); + f2fs_put_page(page, 0); + } + + return ret; +} + +static int f2fs_ioc_decompress_file(struct file *filp) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_inode_info *fi = F2FS_I(inode); + pgoff_t page_idx = 0, last_idx; + unsigned int blk_per_seg = sbi->blocks_per_seg; + int cluster_size = fi->i_cluster_size; + int count, ret; + + if (!f2fs_sb_has_compression(sbi) || + F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER) + return -EOPNOTSUPP; + + if (!(filp->f_mode & FMODE_WRITE)) + return -EBADF; + + if (!f2fs_compressed_file(inode)) + return -EINVAL; + + f2fs_balance_fs(sbi, true); + + file_start_write(filp); + inode_lock(inode); + + if (!f2fs_is_compress_backend_ready(inode)) { + ret = -EOPNOTSUPP; + goto out; + } + + if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { + ret = -EINVAL; + goto out; + } + + ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); + if (ret) + goto out; + + if (!atomic_read(&fi->i_compr_blocks)) + goto out; + + last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); + + count = last_idx - page_idx; + while (count && count >= cluster_size) { + ret = redirty_blocks(inode, page_idx, cluster_size); + if (ret < 0) + break; + + if (get_dirty_pages(inode) >= blk_per_seg) { + ret = filemap_fdatawrite(inode->i_mapping); + if (ret < 0) + break; + } + + count -= cluster_size; + page_idx += cluster_size; + + cond_resched(); + if (fatal_signal_pending(current)) { + ret = -EINTR; + break; + } + } + + if (!ret) + ret = filemap_write_and_wait_range(inode->i_mapping, 0, + LLONG_MAX); + + if (ret) + f2fs_warn(sbi, "%s: The file might be partially decompressed (errno=%d). Please delete the file.", + __func__, ret); +out: + inode_unlock(inode); + file_end_write(filp); + + return ret; +} + +static int f2fs_ioc_compress_file(struct file *filp) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + pgoff_t page_idx = 0, last_idx; + unsigned int blk_per_seg = sbi->blocks_per_seg; + int cluster_size = F2FS_I(inode)->i_cluster_size; + int count, ret; + + if (!f2fs_sb_has_compression(sbi) || + F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER) + return -EOPNOTSUPP; + + if (!(filp->f_mode & FMODE_WRITE)) + return -EBADF; + + if (!f2fs_compressed_file(inode)) + return -EINVAL; + + f2fs_balance_fs(sbi, true); + + file_start_write(filp); + inode_lock(inode); + + if (!f2fs_is_compress_backend_ready(inode)) { + ret = -EOPNOTSUPP; + goto out; + } + + if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { + ret = -EINVAL; + goto out; + } + + ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); + if (ret) + goto out; + + set_inode_flag(inode, FI_ENABLE_COMPRESS); + + last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); + + count = last_idx - page_idx; + while (count && count >= cluster_size) { + ret = redirty_blocks(inode, page_idx, cluster_size); + if (ret < 0) + break; + + if (get_dirty_pages(inode) >= blk_per_seg) { + ret = filemap_fdatawrite(inode->i_mapping); + if (ret < 0) + break; + } + + count -= cluster_size; + page_idx += cluster_size; + + cond_resched(); + if (fatal_signal_pending(current)) { + ret = -EINTR; + break; + } + } + + if (!ret) + ret = filemap_write_and_wait_range(inode->i_mapping, 0, + LLONG_MAX); + + clear_inode_flag(inode, FI_ENABLE_COMPRESS); + + if (ret) + f2fs_warn(sbi, "%s: The file might be partially compressed (errno=%d). Please delete the file.", + __func__, ret); +out: + inode_unlock(inode); + file_end_write(filp); + + return ret; +} + +static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + case FS_IOC_GETVERSION: + return f2fs_ioc_getversion(filp, arg); + case F2FS_IOC_START_ATOMIC_WRITE: + return f2fs_ioc_start_atomic_write(filp, false); + case F2FS_IOC_START_ATOMIC_REPLACE: + return f2fs_ioc_start_atomic_write(filp, true); + case F2FS_IOC_COMMIT_ATOMIC_WRITE: + return f2fs_ioc_commit_atomic_write(filp); + case F2FS_IOC_ABORT_ATOMIC_WRITE: + return f2fs_ioc_abort_atomic_write(filp); + case F2FS_IOC_START_VOLATILE_WRITE: + case F2FS_IOC_RELEASE_VOLATILE_WRITE: + return -EOPNOTSUPP; + case F2FS_IOC_SHUTDOWN: + return f2fs_ioc_shutdown(filp, arg); + case FITRIM: + return f2fs_ioc_fitrim(filp, arg); + case FS_IOC_SET_ENCRYPTION_POLICY: + return f2fs_ioc_set_encryption_policy(filp, arg); + case FS_IOC_GET_ENCRYPTION_POLICY: + return f2fs_ioc_get_encryption_policy(filp, arg); + case FS_IOC_GET_ENCRYPTION_PWSALT: + return f2fs_ioc_get_encryption_pwsalt(filp, arg); + case FS_IOC_GET_ENCRYPTION_POLICY_EX: + return f2fs_ioc_get_encryption_policy_ex(filp, arg); + case FS_IOC_ADD_ENCRYPTION_KEY: + return f2fs_ioc_add_encryption_key(filp, arg); + case FS_IOC_REMOVE_ENCRYPTION_KEY: + return f2fs_ioc_remove_encryption_key(filp, arg); + case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: + return f2fs_ioc_remove_encryption_key_all_users(filp, arg); + case FS_IOC_GET_ENCRYPTION_KEY_STATUS: + return f2fs_ioc_get_encryption_key_status(filp, arg); + case FS_IOC_GET_ENCRYPTION_NONCE: + return f2fs_ioc_get_encryption_nonce(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); + 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_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); + case F2FS_IOC_RESIZE_FS: + return f2fs_ioc_resize_fs(filp, arg); + case FS_IOC_ENABLE_VERITY: + return f2fs_ioc_enable_verity(filp, arg); + case FS_IOC_MEASURE_VERITY: + return f2fs_ioc_measure_verity(filp, arg); + case FS_IOC_READ_VERITY_METADATA: + return f2fs_ioc_read_verity_metadata(filp, arg); + case FS_IOC_GETFSLABEL: + return f2fs_ioc_getfslabel(filp, arg); + case FS_IOC_SETFSLABEL: + return f2fs_ioc_setfslabel(filp, arg); + case F2FS_IOC_GET_COMPRESS_BLOCKS: + return f2fs_ioc_get_compress_blocks(filp, arg); + case F2FS_IOC_RELEASE_COMPRESS_BLOCKS: + return f2fs_release_compress_blocks(filp, arg); + case F2FS_IOC_RESERVE_COMPRESS_BLOCKS: + return f2fs_reserve_compress_blocks(filp, arg); + case F2FS_IOC_SEC_TRIM_FILE: + return f2fs_sec_trim_file(filp, arg); + case F2FS_IOC_GET_COMPRESS_OPTION: + return f2fs_ioc_get_compress_option(filp, arg); + case F2FS_IOC_SET_COMPRESS_OPTION: + return f2fs_ioc_set_compress_option(filp, arg); + case F2FS_IOC_DECOMPRESS_FILE: + return f2fs_ioc_decompress_file(filp); + case F2FS_IOC_COMPRESS_FILE: + return f2fs_ioc_compress_file(filp); + default: + return -ENOTTY; + } +} + +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; + if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(filp)))) + return -ENOSPC; + + return __f2fs_ioctl(filp, cmd, arg); +} + +/* + * Return %true if the given read or write request should use direct I/O, or + * %false if it should use buffered I/O. + */ +static bool f2fs_should_use_dio(struct inode *inode, struct kiocb *iocb, + struct iov_iter *iter) +{ + unsigned int align; + + if (!(iocb->ki_flags & IOCB_DIRECT)) + return false; + + if (f2fs_force_buffered_io(inode, iov_iter_rw(iter))) + return false; + + /* + * Direct I/O not aligned to the disk's logical_block_size will be + * attempted, but will fail with -EINVAL. + * + * f2fs additionally requires that direct I/O be aligned to the + * filesystem block size, which is often a stricter requirement. + * However, f2fs traditionally falls back to buffered I/O on requests + * that are logical_block_size-aligned but not fs-block aligned. + * + * The below logic implements this behavior. + */ + align = iocb->ki_pos | iov_iter_alignment(iter); + if (!IS_ALIGNED(align, i_blocksize(inode)) && + IS_ALIGNED(align, bdev_logical_block_size(inode->i_sb->s_bdev))) + return false; + + return true; +} + +static int f2fs_dio_read_end_io(struct kiocb *iocb, ssize_t size, int error, + unsigned int flags) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp)); + + dec_page_count(sbi, F2FS_DIO_READ); + if (error) + return error; + f2fs_update_iostat(sbi, NULL, APP_DIRECT_READ_IO, size); + return 0; +} + +static const struct iomap_dio_ops f2fs_iomap_dio_read_ops = { + .end_io = f2fs_dio_read_end_io, +}; + +static ssize_t f2fs_dio_read_iter(struct kiocb *iocb, struct iov_iter *to) +{ + struct file *file = iocb->ki_filp; + struct inode *inode = file_inode(file); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_inode_info *fi = F2FS_I(inode); + const loff_t pos = iocb->ki_pos; + const size_t count = iov_iter_count(to); + struct iomap_dio *dio; + ssize_t ret; + + if (count == 0) + return 0; /* skip atime update */ + + trace_f2fs_direct_IO_enter(inode, iocb, count, READ); + + if (iocb->ki_flags & IOCB_NOWAIT) { + if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) { + ret = -EAGAIN; + goto out; + } + } else { + f2fs_down_read(&fi->i_gc_rwsem[READ]); + } + + /* + * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of + * the higher-level function iomap_dio_rw() in order to ensure that the + * F2FS_DIO_READ counter will be decremented correctly in all cases. + */ + inc_page_count(sbi, F2FS_DIO_READ); + dio = __iomap_dio_rw(iocb, to, &f2fs_iomap_ops, + &f2fs_iomap_dio_read_ops, 0, NULL, 0); + if (IS_ERR_OR_NULL(dio)) { + ret = PTR_ERR_OR_ZERO(dio); + if (ret != -EIOCBQUEUED) + dec_page_count(sbi, F2FS_DIO_READ); + } else { + ret = iomap_dio_complete(dio); + } + + f2fs_up_read(&fi->i_gc_rwsem[READ]); + + file_accessed(file); +out: + trace_f2fs_direct_IO_exit(inode, pos, count, READ, ret); + return ret; +} + +static void f2fs_trace_rw_file_path(struct file *file, loff_t pos, size_t count, + int rw) +{ + struct inode *inode = file_inode(file); + char *buf, *path; + + buf = f2fs_getname(F2FS_I_SB(inode)); + if (!buf) + return; + path = dentry_path_raw(file_dentry(file), buf, PATH_MAX); + if (IS_ERR(path)) + goto free_buf; + if (rw == WRITE) + trace_f2fs_datawrite_start(inode, pos, count, + current->pid, path, current->comm); + else + trace_f2fs_dataread_start(inode, pos, count, + current->pid, path, current->comm); +free_buf: + f2fs_putname(buf); +} + +static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to) +{ + struct inode *inode = file_inode(iocb->ki_filp); + const loff_t pos = iocb->ki_pos; + ssize_t ret; + + if (!f2fs_is_compress_backend_ready(inode)) + return -EOPNOTSUPP; + + if (trace_f2fs_dataread_start_enabled()) + f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos, + iov_iter_count(to), READ); + + if (f2fs_should_use_dio(inode, iocb, to)) { + ret = f2fs_dio_read_iter(iocb, to); + } else { + ret = filemap_read(iocb, to, 0); + if (ret > 0) + f2fs_update_iostat(F2FS_I_SB(inode), inode, + APP_BUFFERED_READ_IO, ret); + } + if (trace_f2fs_dataread_end_enabled()) + trace_f2fs_dataread_end(inode, pos, ret); + return ret; +} + +static ssize_t f2fs_file_splice_read(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, + size_t len, unsigned int flags) +{ + struct inode *inode = file_inode(in); + const loff_t pos = *ppos; + ssize_t ret; + + if (!f2fs_is_compress_backend_ready(inode)) + return -EOPNOTSUPP; + + if (trace_f2fs_dataread_start_enabled()) + f2fs_trace_rw_file_path(in, pos, len, READ); + + ret = filemap_splice_read(in, ppos, pipe, len, flags); + if (ret > 0) + f2fs_update_iostat(F2FS_I_SB(inode), inode, + APP_BUFFERED_READ_IO, ret); + + if (trace_f2fs_dataread_end_enabled()) + trace_f2fs_dataread_end(inode, pos, ret); + return ret; +} + +static ssize_t f2fs_write_checks(struct kiocb *iocb, struct iov_iter *from) +{ + struct file *file = iocb->ki_filp; + struct inode *inode = file_inode(file); + ssize_t count; + int err; + + if (IS_IMMUTABLE(inode)) + return -EPERM; + + if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) + return -EPERM; + + count = generic_write_checks(iocb, from); + if (count <= 0) + return count; + + err = file_modified(file); + if (err) + return err; + return count; +} + +/* + * Preallocate blocks for a write request, if it is possible and helpful to do + * so. Returns a positive number if blocks may have been preallocated, 0 if no + * blocks were preallocated, or a negative errno value if something went + * seriously wrong. Also sets FI_PREALLOCATED_ALL on the inode if *all* the + * requested blocks (not just some of them) have been allocated. + */ +static int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *iter, + bool dio) +{ + struct inode *inode = file_inode(iocb->ki_filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + const loff_t pos = iocb->ki_pos; + const size_t count = iov_iter_count(iter); + struct f2fs_map_blocks map = {}; + int flag; + int ret; + + /* If it will be an out-of-place direct write, don't bother. */ + if (dio && f2fs_lfs_mode(sbi)) + return 0; + /* + * Don't preallocate holes aligned to DIO_SKIP_HOLES which turns into + * buffered IO, if DIO meets any holes. + */ + if (dio && i_size_read(inode) && + (F2FS_BYTES_TO_BLK(pos) < F2FS_BLK_ALIGN(i_size_read(inode)))) + return 0; + + /* No-wait I/O can't allocate blocks. */ + if (iocb->ki_flags & IOCB_NOWAIT) + return 0; + + /* If it will be a short write, don't bother. */ + if (fault_in_iov_iter_readable(iter, count)) + return 0; + + if (f2fs_has_inline_data(inode)) { + /* If the data will fit inline, don't bother. */ + if (pos + count <= MAX_INLINE_DATA(inode)) + return 0; + ret = f2fs_convert_inline_inode(inode); + if (ret) + return ret; + } + + /* Do not preallocate blocks that will be written partially in 4KB. */ + map.m_lblk = F2FS_BLK_ALIGN(pos); + map.m_len = F2FS_BYTES_TO_BLK(pos + count); + if (map.m_len > map.m_lblk) + map.m_len -= map.m_lblk; + else + map.m_len = 0; + map.m_may_create = true; + if (dio) { + map.m_seg_type = f2fs_rw_hint_to_seg_type(inode->i_write_hint); + flag = F2FS_GET_BLOCK_PRE_DIO; + } else { + map.m_seg_type = NO_CHECK_TYPE; + flag = F2FS_GET_BLOCK_PRE_AIO; + } + + ret = f2fs_map_blocks(inode, &map, flag); + /* -ENOSPC|-EDQUOT are fine to report the number of allocated blocks. */ + if (ret < 0 && !((ret == -ENOSPC || ret == -EDQUOT) && map.m_len > 0)) + return ret; + if (ret == 0) + set_inode_flag(inode, FI_PREALLOCATED_ALL); + return map.m_len; +} + +static ssize_t f2fs_buffered_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 (iocb->ki_flags & IOCB_NOWAIT) + return -EOPNOTSUPP; + + ret = generic_perform_write(iocb, from); + + if (ret > 0) { + f2fs_update_iostat(F2FS_I_SB(inode), inode, + APP_BUFFERED_IO, ret); + } + return ret; +} + +static int f2fs_dio_write_end_io(struct kiocb *iocb, ssize_t size, int error, + unsigned int flags) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp)); + + dec_page_count(sbi, F2FS_DIO_WRITE); + if (error) + return error; + f2fs_update_time(sbi, REQ_TIME); + f2fs_update_iostat(sbi, NULL, APP_DIRECT_IO, size); + return 0; +} + +static const struct iomap_dio_ops f2fs_iomap_dio_write_ops = { + .end_io = f2fs_dio_write_end_io, +}; + +static void f2fs_flush_buffered_write(struct address_space *mapping, + loff_t start_pos, loff_t end_pos) +{ + int ret; + + ret = filemap_write_and_wait_range(mapping, start_pos, end_pos); + if (ret < 0) + return; + invalidate_mapping_pages(mapping, + start_pos >> PAGE_SHIFT, + end_pos >> PAGE_SHIFT); +} + +static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from, + bool *may_need_sync) +{ + struct file *file = iocb->ki_filp; + struct inode *inode = file_inode(file); + struct f2fs_inode_info *fi = F2FS_I(inode); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + const bool do_opu = f2fs_lfs_mode(sbi); + const loff_t pos = iocb->ki_pos; + const ssize_t count = iov_iter_count(from); + unsigned int dio_flags; + struct iomap_dio *dio; + ssize_t ret; + + trace_f2fs_direct_IO_enter(inode, iocb, count, WRITE); + + if (iocb->ki_flags & IOCB_NOWAIT) { + /* f2fs_convert_inline_inode() and block allocation can block */ + if (f2fs_has_inline_data(inode) || + !f2fs_overwrite_io(inode, pos, count)) { + ret = -EAGAIN; + goto out; + } + + if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[WRITE])) { + ret = -EAGAIN; + goto out; + } + if (do_opu && !f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) { + f2fs_up_read(&fi->i_gc_rwsem[WRITE]); + ret = -EAGAIN; + goto out; + } + } else { + ret = f2fs_convert_inline_inode(inode); + if (ret) + goto out; + + f2fs_down_read(&fi->i_gc_rwsem[WRITE]); + if (do_opu) + f2fs_down_read(&fi->i_gc_rwsem[READ]); + } + + /* + * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of + * the higher-level function iomap_dio_rw() in order to ensure that the + * F2FS_DIO_WRITE counter will be decremented correctly in all cases. + */ + inc_page_count(sbi, F2FS_DIO_WRITE); + dio_flags = 0; + if (pos + count > inode->i_size) + dio_flags |= IOMAP_DIO_FORCE_WAIT; + dio = __iomap_dio_rw(iocb, from, &f2fs_iomap_ops, + &f2fs_iomap_dio_write_ops, dio_flags, NULL, 0); + if (IS_ERR_OR_NULL(dio)) { + ret = PTR_ERR_OR_ZERO(dio); + if (ret == -ENOTBLK) + ret = 0; + if (ret != -EIOCBQUEUED) + dec_page_count(sbi, F2FS_DIO_WRITE); + } else { + ret = iomap_dio_complete(dio); + } + + if (do_opu) + f2fs_up_read(&fi->i_gc_rwsem[READ]); + f2fs_up_read(&fi->i_gc_rwsem[WRITE]); + + if (ret < 0) + goto out; + if (pos + ret > inode->i_size) + f2fs_i_size_write(inode, pos + ret); + if (!do_opu) + set_inode_flag(inode, FI_UPDATE_WRITE); + + if (iov_iter_count(from)) { + ssize_t ret2; + loff_t bufio_start_pos = iocb->ki_pos; + + /* + * The direct write was partial, so we need to fall back to a + * buffered write for the remainder. + */ + + ret2 = f2fs_buffered_write_iter(iocb, from); + if (iov_iter_count(from)) + f2fs_write_failed(inode, iocb->ki_pos); + if (ret2 < 0) + goto out; + + /* + * Ensure that the pagecache pages are written to disk and + * invalidated to preserve the expected O_DIRECT semantics. + */ + if (ret2 > 0) { + loff_t bufio_end_pos = bufio_start_pos + ret2 - 1; + + ret += ret2; + + f2fs_flush_buffered_write(file->f_mapping, + bufio_start_pos, + bufio_end_pos); + } + } else { + /* iomap_dio_rw() already handled the generic_write_sync(). */ + *may_need_sync = false; + } +out: + trace_f2fs_direct_IO_exit(inode, pos, count, WRITE, ret); + return ret; +} + +static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) +{ + struct inode *inode = file_inode(iocb->ki_filp); + const loff_t orig_pos = iocb->ki_pos; + const size_t orig_count = iov_iter_count(from); + loff_t target_size; + bool dio; + bool may_need_sync = true; + int preallocated; + ssize_t ret; + + if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) { + ret = -EIO; + goto out; + } + + if (!f2fs_is_compress_backend_ready(inode)) { + ret = -EOPNOTSUPP; + goto out; + } + + if (iocb->ki_flags & IOCB_NOWAIT) { + if (!inode_trylock(inode)) { + ret = -EAGAIN; + goto out; + } + } else { + inode_lock(inode); + } + + ret = f2fs_write_checks(iocb, from); + if (ret <= 0) + goto out_unlock; + + /* Determine whether we will do a direct write or a buffered write. */ + dio = f2fs_should_use_dio(inode, iocb, from); + + /* Possibly preallocate the blocks for the write. */ + target_size = iocb->ki_pos + iov_iter_count(from); + preallocated = f2fs_preallocate_blocks(iocb, from, dio); + if (preallocated < 0) { + ret = preallocated; + } else { + if (trace_f2fs_datawrite_start_enabled()) + f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos, + orig_count, WRITE); + + /* Do the actual write. */ + ret = dio ? + f2fs_dio_write_iter(iocb, from, &may_need_sync) : + f2fs_buffered_write_iter(iocb, from); + + if (trace_f2fs_datawrite_end_enabled()) + trace_f2fs_datawrite_end(inode, orig_pos, ret); + } + + /* Don't leave any preallocated blocks around past i_size. */ + if (preallocated && i_size_read(inode) < target_size) { + f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + filemap_invalidate_lock(inode->i_mapping); + if (!f2fs_truncate(inode)) + file_dont_truncate(inode); + filemap_invalidate_unlock(inode->i_mapping); + f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); + } else { + file_dont_truncate(inode); + } + + clear_inode_flag(inode, FI_PREALLOCATED_ALL); +out_unlock: + inode_unlock(inode); +out: + trace_f2fs_file_write_iter(inode, orig_pos, orig_count, ret); + + if (ret > 0 && may_need_sync) + ret = generic_write_sync(iocb, ret); + + /* If buffered IO was forced, flush and drop the data from + * the page cache to preserve O_DIRECT semantics + */ + if (ret > 0 && !dio && (iocb->ki_flags & IOCB_DIRECT)) + f2fs_flush_buffered_write(iocb->ki_filp->f_mapping, + orig_pos, + orig_pos + ret - 1); + + return ret; +} + +static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len, + int advice) +{ + struct address_space *mapping; + struct backing_dev_info *bdi; + struct inode *inode = file_inode(filp); + int err; + + if (advice == POSIX_FADV_SEQUENTIAL) { + if (S_ISFIFO(inode->i_mode)) + return -ESPIPE; + + mapping = filp->f_mapping; + if (!mapping || len < 0) + return -EINVAL; + + bdi = inode_to_bdi(mapping->host); + filp->f_ra.ra_pages = bdi->ra_pages * + F2FS_I_SB(inode)->seq_file_ra_mul; + spin_lock(&filp->f_lock); + filp->f_mode &= ~FMODE_RANDOM; + spin_unlock(&filp->f_lock); + return 0; + } + + err = generic_fadvise(filp, offset, len, advice); + if (!err && advice == POSIX_FADV_DONTNEED && + test_opt(F2FS_I_SB(inode), COMPRESS_CACHE) && + f2fs_compressed_file(inode)) + f2fs_invalidate_compress_pages(F2FS_I_SB(inode), inode->i_ino); + + return err; +} + +#ifdef CONFIG_COMPAT +struct compat_f2fs_gc_range { + u32 sync; + compat_u64 start; + compat_u64 len; +}; +#define F2FS_IOC32_GARBAGE_COLLECT_RANGE _IOW(F2FS_IOCTL_MAGIC, 11,\ + struct compat_f2fs_gc_range) + +static int f2fs_compat_ioc_gc_range(struct file *file, unsigned long arg) +{ + struct compat_f2fs_gc_range __user *urange; + struct f2fs_gc_range range; + int err; + + urange = compat_ptr(arg); + err = get_user(range.sync, &urange->sync); + err |= get_user(range.start, &urange->start); + err |= get_user(range.len, &urange->len); + if (err) + return -EFAULT; + + return __f2fs_ioc_gc_range(file, &range); +} + +struct compat_f2fs_move_range { + u32 dst_fd; + compat_u64 pos_in; + compat_u64 pos_out; + compat_u64 len; +}; +#define F2FS_IOC32_MOVE_RANGE _IOWR(F2FS_IOCTL_MAGIC, 9, \ + struct compat_f2fs_move_range) + +static int f2fs_compat_ioc_move_range(struct file *file, unsigned long arg) +{ + struct compat_f2fs_move_range __user *urange; + struct f2fs_move_range range; + int err; + + urange = compat_ptr(arg); + err = get_user(range.dst_fd, &urange->dst_fd); + err |= get_user(range.pos_in, &urange->pos_in); + err |= get_user(range.pos_out, &urange->pos_out); + err |= get_user(range.len, &urange->len); + if (err) + return -EFAULT; + + return __f2fs_ioc_move_range(file, &range); +} + +long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file))))) + return -EIO; + if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(file)))) + return -ENOSPC; + + switch (cmd) { + case FS_IOC32_GETVERSION: + cmd = FS_IOC_GETVERSION; + break; + case F2FS_IOC32_GARBAGE_COLLECT_RANGE: + return f2fs_compat_ioc_gc_range(file, arg); + case F2FS_IOC32_MOVE_RANGE: + return f2fs_compat_ioc_move_range(file, arg); + case F2FS_IOC_START_ATOMIC_WRITE: + case F2FS_IOC_START_ATOMIC_REPLACE: + case F2FS_IOC_COMMIT_ATOMIC_WRITE: + case F2FS_IOC_START_VOLATILE_WRITE: + case F2FS_IOC_RELEASE_VOLATILE_WRITE: + case F2FS_IOC_ABORT_ATOMIC_WRITE: + case F2FS_IOC_SHUTDOWN: + case FITRIM: + case FS_IOC_SET_ENCRYPTION_POLICY: + case FS_IOC_GET_ENCRYPTION_PWSALT: + case FS_IOC_GET_ENCRYPTION_POLICY: + case FS_IOC_GET_ENCRYPTION_POLICY_EX: + case FS_IOC_ADD_ENCRYPTION_KEY: + case FS_IOC_REMOVE_ENCRYPTION_KEY: + case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: + case FS_IOC_GET_ENCRYPTION_KEY_STATUS: + case FS_IOC_GET_ENCRYPTION_NONCE: + case F2FS_IOC_GARBAGE_COLLECT: + case F2FS_IOC_WRITE_CHECKPOINT: + case F2FS_IOC_DEFRAGMENT: + case F2FS_IOC_FLUSH_DEVICE: + case F2FS_IOC_GET_FEATURES: + case F2FS_IOC_GET_PIN_FILE: + case F2FS_IOC_SET_PIN_FILE: + case F2FS_IOC_PRECACHE_EXTENTS: + case F2FS_IOC_RESIZE_FS: + case FS_IOC_ENABLE_VERITY: + case FS_IOC_MEASURE_VERITY: + case FS_IOC_READ_VERITY_METADATA: + case FS_IOC_GETFSLABEL: + case FS_IOC_SETFSLABEL: + case F2FS_IOC_GET_COMPRESS_BLOCKS: + case F2FS_IOC_RELEASE_COMPRESS_BLOCKS: + case F2FS_IOC_RESERVE_COMPRESS_BLOCKS: + case F2FS_IOC_SEC_TRIM_FILE: + case F2FS_IOC_GET_COMPRESS_OPTION: + case F2FS_IOC_SET_COMPRESS_OPTION: + case F2FS_IOC_DECOMPRESS_FILE: + case F2FS_IOC_COMPRESS_FILE: + 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 = f2fs_file_read_iter, + .write_iter = f2fs_file_write_iter, + .iopoll = iocb_bio_iopoll, + .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 = f2fs_file_splice_read, + .splice_write = iter_file_splice_write, + .fadvise = f2fs_file_fadvise, +}; |