/* * fs/f2fs/file.c * * Copyright (c) 2012 Samsung Electronics Co., Ltd. * http://www.samsung.com/ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "f2fs.h" #include "node.h" #include "segment.h" #include "xattr.h" #include "acl.h" #include "trace.h" #include static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) { struct page *page = vmf->page; struct inode *inode = file_inode(vma->vm_file); struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct dnode_of_data dn; int err; f2fs_balance_fs(sbi); sb_start_pagefault(inode->i_sb); f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); /* block allocation */ f2fs_lock_op(sbi); set_new_dnode(&dn, inode, NULL, NULL, 0); err = f2fs_reserve_block(&dn, page->index); if (err) { f2fs_unlock_op(sbi); goto out; } f2fs_put_dnode(&dn); f2fs_unlock_op(sbi); file_update_time(vma->vm_file); lock_page(page); if (unlikely(page->mapping != inode->i_mapping || page_offset(page) > i_size_read(inode) || !PageUptodate(page))) { unlock_page(page); err = -EFAULT; goto out; } /* * check to see if the page is mapped already (no holes) */ if (PageMappedToDisk(page)) goto mapped; /* page is wholly or partially inside EOF */ if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { unsigned offset; offset = i_size_read(inode) & ~PAGE_CACHE_MASK; zero_user_segment(page, offset, PAGE_CACHE_SIZE); } set_page_dirty(page); SetPageUptodate(page); trace_f2fs_vm_page_mkwrite(page, DATA); mapped: /* fill the page */ f2fs_wait_on_page_writeback(page, DATA); out: sb_end_pagefault(inode->i_sb); return block_page_mkwrite_return(err); } static const struct vm_operations_struct f2fs_file_vm_ops = { .fault = filemap_fault, .map_pages = filemap_map_pages, .page_mkwrite = f2fs_vm_page_mkwrite, }; static int get_parent_ino(struct inode *inode, nid_t *pino) { struct dentry *dentry; inode = igrab(inode); dentry = d_find_any_alias(inode); iput(inode); if (!dentry) return 0; if (update_dent_inode(inode, &dentry->d_name)) { dput(dentry); return 0; } *pino = parent_ino(dentry); dput(dentry); return 1; } static inline bool need_do_checkpoint(struct inode *inode) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); bool need_cp = false; if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) need_cp = true; else if (file_wrong_pino(inode)) need_cp = true; else if (!space_for_roll_forward(sbi)) need_cp = true; else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) need_cp = true; else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) need_cp = true; else if (test_opt(sbi, FASTBOOT)) need_cp = true; else if (sbi->active_logs == 2) need_cp = true; return need_cp; } static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) { struct page *i = find_get_page(NODE_MAPPING(sbi), ino); bool ret = false; /* But we need to avoid that there are some inode updates */ if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) ret = true; f2fs_put_page(i, 0); return ret; } static void try_to_fix_pino(struct inode *inode) { struct f2fs_inode_info *fi = F2FS_I(inode); nid_t pino; down_write(&fi->i_sem); fi->xattr_ver = 0; if (file_wrong_pino(inode) && inode->i_nlink == 1 && get_parent_ino(inode, &pino)) { fi->i_pino = pino; file_got_pino(inode); up_write(&fi->i_sem); mark_inode_dirty_sync(inode); f2fs_write_inode(inode, NULL); } else { up_write(&fi->i_sem); } } int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) { struct inode *inode = file->f_mapping->host; struct f2fs_inode_info *fi = F2FS_I(inode); struct f2fs_sb_info *sbi = F2FS_I_SB(inode); nid_t ino = inode->i_ino; int ret = 0; bool need_cp = false; struct writeback_control wbc = { .sync_mode = WB_SYNC_ALL, .nr_to_write = LONG_MAX, .for_reclaim = 0, }; if (unlikely(f2fs_readonly(inode->i_sb))) return 0; trace_f2fs_sync_file_enter(inode); /* if fdatasync is triggered, let's do in-place-update */ if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) set_inode_flag(fi, FI_NEED_IPU); ret = filemap_write_and_wait_range(inode->i_mapping, start, end); clear_inode_flag(fi, FI_NEED_IPU); if (ret) { trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); return ret; } /* if the inode is dirty, let's recover all the time */ if (!datasync && is_inode_flag_set(fi, FI_DIRTY_INODE)) { update_inode_page(inode); goto go_write; } /* * if there is no written data, don't waste time to write recovery info. */ if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && !exist_written_data(sbi, ino, APPEND_INO)) { /* it may call write_inode just prior to fsync */ if (need_inode_page_update(sbi, ino)) goto go_write; if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || exist_written_data(sbi, ino, UPDATE_INO)) goto flush_out; goto out; } go_write: /* guarantee free sections for fsync */ f2fs_balance_fs(sbi); /* * Both of fdatasync() and fsync() are able to be recovered from * sudden-power-off. */ down_read(&fi->i_sem); need_cp = need_do_checkpoint(inode); up_read(&fi->i_sem); if (need_cp) { /* all the dirty node pages should be flushed for POR */ ret = f2fs_sync_fs(inode->i_sb, 1); /* * We've secured consistency through sync_fs. Following pino * will be used only for fsynced inodes after checkpoint. */ try_to_fix_pino(inode); goto out; } sync_nodes: sync_node_pages(sbi, ino, &wbc); /* if cp_error was enabled, we should avoid infinite loop */ if (unlikely(f2fs_cp_error(sbi))) goto out; if (need_inode_block_update(sbi, ino)) { mark_inode_dirty_sync(inode); f2fs_write_inode(inode, NULL); goto sync_nodes; } ret = wait_on_node_pages_writeback(sbi, ino); if (ret) goto out; /* once recovery info is written, don't need to tack this */ remove_dirty_inode(sbi, ino, APPEND_INO); clear_inode_flag(fi, FI_APPEND_WRITE); flush_out: remove_dirty_inode(sbi, ino, UPDATE_INO); clear_inode_flag(fi, FI_UPDATE_WRITE); ret = f2fs_issue_flush(sbi); out: trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); f2fs_trace_ios(NULL, NULL, 1); return ret; } static pgoff_t __get_first_dirty_index(struct address_space *mapping, pgoff_t pgofs, int whence) { struct pagevec pvec; int nr_pages; if (whence != SEEK_DATA) return 0; /* find first dirty page index */ pagevec_init(&pvec, 0); nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, PAGECACHE_TAG_DIRTY, 1); pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX; pagevec_release(&pvec); return pgofs; } static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, int whence) { switch (whence) { case SEEK_DATA: if ((blkaddr == NEW_ADDR && dirty == pgofs) || (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) return true; break; case SEEK_HOLE: if (blkaddr == NULL_ADDR) return true; break; } return false; } static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_mapping->host; loff_t maxbytes = inode->i_sb->s_maxbytes; struct dnode_of_data dn; pgoff_t pgofs, end_offset, dirty; loff_t data_ofs = offset; loff_t isize; int err = 0; mutex_lock(&inode->i_mutex); isize = i_size_read(inode); if (offset >= isize) goto fail; /* handle inline data case */ if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { if (whence == SEEK_HOLE) data_ofs = isize; goto found; } pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) { set_new_dnode(&dn, inode, NULL, NULL, 0); err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); if (err && err != -ENOENT) { goto fail; } else if (err == -ENOENT) { /* direct node does not exists */ if (whence == SEEK_DATA) { pgofs = PGOFS_OF_NEXT_DNODE(pgofs, F2FS_I(inode)); continue; } else { goto found; } } end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(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_CACHE_SHIFT) { block_t blkaddr; blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); if (__found_offset(blkaddr, dirty, pgofs, whence)) { f2fs_put_dnode(&dn); goto found; } } f2fs_put_dnode(&dn); } if (whence == SEEK_DATA) goto fail; found: if (whence == SEEK_HOLE && data_ofs > isize) data_ofs = isize; mutex_unlock(&inode->i_mutex); return vfs_setpos(file, data_ofs, maxbytes); fail: mutex_unlock(&inode->i_mutex); return -ENXIO; } static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_mapping->host; loff_t maxbytes = inode->i_sb->s_maxbytes; switch (whence) { case SEEK_SET: case SEEK_CUR: case SEEK_END: return generic_file_llseek_size(file, offset, whence, maxbytes, i_size_read(inode)); case SEEK_DATA: case SEEK_HOLE: if (offset < 0) return -ENXIO; return f2fs_seek_block(file, offset, whence); } return -EINVAL; } static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) { struct inode *inode = file_inode(file); /* we don't need to use inline_data strictly */ if (f2fs_has_inline_data(inode)) { int err = f2fs_convert_inline_inode(inode); if (err) return err; } file_accessed(file); vma->vm_ops = &f2fs_file_vm_ops; return 0; } int truncate_data_blocks_range(struct dnode_of_data *dn, int count) { int nr_free = 0, ofs = dn->ofs_in_node; struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); struct f2fs_node *raw_node; __le32 *addr; raw_node = F2FS_NODE(dn->node_page); addr = blkaddr_in_node(raw_node) + ofs; for (; count > 0; count--, addr++, dn->ofs_in_node++) { block_t blkaddr = le32_to_cpu(*addr); if (blkaddr == NULL_ADDR) continue; dn->data_blkaddr = NULL_ADDR; update_extent_cache(dn); invalidate_blocks(sbi, blkaddr); nr_free++; } if (nr_free) { dec_valid_block_count(sbi, dn->inode, nr_free); set_page_dirty(dn->node_page); sync_inode_page(dn); } dn->ofs_in_node = ofs; trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, dn->ofs_in_node, nr_free); return nr_free; } void truncate_data_blocks(struct dnode_of_data *dn) { truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); } static int truncate_partial_data_page(struct inode *inode, u64 from) { unsigned offset = from & (PAGE_CACHE_SIZE - 1); struct page *page; if (!offset) return 0; page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); if (IS_ERR(page)) return 0; lock_page(page); if (unlikely(!PageUptodate(page) || page->mapping != inode->i_mapping)) goto out; f2fs_wait_on_page_writeback(page, DATA); zero_user(page, offset, PAGE_CACHE_SIZE - offset); set_page_dirty(page); out: f2fs_put_page(page, 1); return 0; } int truncate_blocks(struct inode *inode, u64 from, bool lock) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); unsigned int blocksize = inode->i_sb->s_blocksize; struct dnode_of_data dn; pgoff_t free_from; int count = 0, err = 0; struct page *ipage; trace_f2fs_truncate_blocks_enter(inode, from); free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1); if (lock) f2fs_lock_op(sbi); ipage = get_node_page(sbi, inode->i_ino); if (IS_ERR(ipage)) { err = PTR_ERR(ipage); goto out; } if (f2fs_has_inline_data(inode)) { f2fs_put_page(ipage, 1); goto out; } set_new_dnode(&dn, inode, ipage, NULL, 0); err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); if (err) { if (err == -ENOENT) goto free_next; goto out; } count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); count -= dn.ofs_in_node; f2fs_bug_on(sbi, count < 0); if (dn.ofs_in_node || IS_INODE(dn.node_page)) { truncate_data_blocks_range(&dn, count); free_from += count; } f2fs_put_dnode(&dn); free_next: err = truncate_inode_blocks(inode, free_from); out: if (lock) f2fs_unlock_op(sbi); /* lastly zero out the first data page */ if (!err) err = truncate_partial_data_page(inode, from); trace_f2fs_truncate_blocks_exit(inode, err); return err; } void f2fs_truncate(struct inode *inode) { if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) return; trace_f2fs_truncate(inode); /* we should check inline_data size */ if (f2fs_has_inline_data(inode) && !f2fs_may_inline(inode)) { if (f2fs_convert_inline_inode(inode)) return; } if (!truncate_blocks(inode, i_size_read(inode), true)) { inode->i_mtime = inode->i_ctime = CURRENT_TIME; mark_inode_dirty(inode); } } int f2fs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { struct inode *inode = dentry->d_inode; generic_fillattr(inode, stat); stat->blocks <<= 3; return 0; } #ifdef CONFIG_F2FS_FS_POSIX_ACL static void __setattr_copy(struct inode *inode, const struct iattr *attr) { struct f2fs_inode_info *fi = F2FS_I(inode); unsigned int ia_valid = attr->ia_valid; if (ia_valid & ATTR_UID) inode->i_uid = attr->ia_uid; if (ia_valid & ATTR_GID) inode->i_gid = attr->ia_gid; if (ia_valid & ATTR_ATIME) inode->i_atime = timespec_trunc(attr->ia_atime, inode->i_sb->s_time_gran); if (ia_valid & ATTR_MTIME) inode->i_mtime = timespec_trunc(attr->ia_mtime, inode->i_sb->s_time_gran); if (ia_valid & ATTR_CTIME) inode->i_ctime = timespec_trunc(attr->ia_ctime, inode->i_sb->s_time_gran); if (ia_valid & ATTR_MODE) { umode_t mode = attr->ia_mode; if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) mode &= ~S_ISGID; set_acl_inode(fi, mode); } } #else #define __setattr_copy setattr_copy #endif int f2fs_setattr(struct dentry *dentry, struct iattr *attr) { struct inode *inode = dentry->d_inode; struct f2fs_inode_info *fi = F2FS_I(inode); int err; err = inode_change_ok(inode, attr); if (err) return err; if (attr->ia_valid & ATTR_SIZE) { if (attr->ia_size != i_size_read(inode)) { truncate_setsize(inode, attr->ia_size); f2fs_truncate(inode); f2fs_balance_fs(F2FS_I_SB(inode)); } else { /* * giving a chance to truncate blocks past EOF which * are fallocated with FALLOC_FL_KEEP_SIZE. */ f2fs_truncate(inode); } } __setattr_copy(inode, attr); if (attr->ia_valid & ATTR_MODE) { err = posix_acl_chmod(inode, get_inode_mode(inode)); if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { inode->i_mode = fi->i_acl_mode; clear_inode_flag(fi, FI_ACL_MODE); } } mark_inode_dirty(inode); return err; } const struct inode_operations f2fs_file_inode_operations = { .getattr = f2fs_getattr, .setattr = f2fs_setattr, .get_acl = f2fs_get_acl, .set_acl = f2fs_set_acl, #ifdef CONFIG_F2FS_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, .listxattr = f2fs_listxattr, .removexattr = generic_removexattr, #endif .fiemap = f2fs_fiemap, }; static void 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; f2fs_balance_fs(sbi); f2fs_lock_op(sbi); page = get_new_data_page(inode, NULL, index, false); f2fs_unlock_op(sbi); if (!IS_ERR(page)) { f2fs_wait_on_page_writeback(page, DATA); zero_user(page, start, len); set_page_dirty(page); f2fs_put_page(page, 1); } } int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) { pgoff_t index; int err; for (index = pg_start; index < pg_end; index++) { struct dnode_of_data dn; set_new_dnode(&dn, inode, NULL, NULL, 0); err = get_dnode_of_data(&dn, index, LOOKUP_NODE); if (err) { if (err == -ENOENT) continue; return err; } if (dn.data_blkaddr != NULL_ADDR) truncate_data_blocks_range(&dn, 1); f2fs_put_dnode(&dn); } return 0; } static int punch_hole(struct inode *inode, loff_t offset, loff_t len) { pgoff_t pg_start, pg_end; loff_t off_start, off_end; int ret = 0; if (!S_ISREG(inode->i_mode)) return -EOPNOTSUPP; /* skip punching hole beyond i_size */ if (offset >= inode->i_size) return ret; if (f2fs_has_inline_data(inode)) { ret = f2fs_convert_inline_inode(inode); if (ret) return ret; } pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; off_start = offset & (PAGE_CACHE_SIZE - 1); off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); if (pg_start == pg_end) { fill_zero(inode, pg_start, off_start, off_end - off_start); } else { if (off_start) fill_zero(inode, pg_start++, off_start, PAGE_CACHE_SIZE - off_start); if (off_end) fill_zero(inode, pg_end, 0, off_end); if (pg_start < pg_end) { struct address_space *mapping = inode->i_mapping; loff_t blk_start, blk_end; struct f2fs_sb_info *sbi = F2FS_I_SB(inode); f2fs_balance_fs(sbi); blk_start = pg_start << PAGE_CACHE_SHIFT; blk_end = pg_end << PAGE_CACHE_SHIFT; truncate_inode_pages_range(mapping, blk_start, blk_end - 1); f2fs_lock_op(sbi); ret = truncate_hole(inode, pg_start, pg_end); f2fs_unlock_op(sbi); } } return ret; } static int expand_inode_data(struct inode *inode, loff_t offset, loff_t len, int mode) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); pgoff_t index, pg_start, pg_end; loff_t new_size = i_size_read(inode); loff_t off_start, off_end; int ret = 0; f2fs_balance_fs(sbi); ret = inode_newsize_ok(inode, (len + offset)); if (ret) return ret; if (f2fs_has_inline_data(inode)) { ret = f2fs_convert_inline_inode(inode); if (ret) return ret; } pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; off_start = offset & (PAGE_CACHE_SIZE - 1); off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); f2fs_lock_op(sbi); for (index = pg_start; index <= pg_end; index++) { struct dnode_of_data dn; if (index == pg_end && !off_end) goto noalloc; set_new_dnode(&dn, inode, NULL, NULL, 0); ret = f2fs_reserve_block(&dn, index); if (ret) break; noalloc: if (pg_start == pg_end) new_size = offset + len; else if (index == pg_start && off_start) new_size = (index + 1) << PAGE_CACHE_SHIFT; else if (index == pg_end) new_size = (index << PAGE_CACHE_SHIFT) + off_end; else new_size += PAGE_CACHE_SIZE; } if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) { i_size_write(inode, new_size); mark_inode_dirty(inode); update_inode_page(inode); } f2fs_unlock_op(sbi); return ret; } static long f2fs_fallocate(struct file *file, int mode, loff_t offset, loff_t len) { struct inode *inode = file_inode(file); long ret; if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) return -EOPNOTSUPP; mutex_lock(&inode->i_mutex); if (mode & FALLOC_FL_PUNCH_HOLE) ret = punch_hole(inode, offset, len); else ret = expand_inode_data(inode, offset, len, mode); if (!ret) { inode->i_mtime = inode->i_ctime = CURRENT_TIME; mark_inode_dirty(inode); } mutex_unlock(&inode->i_mutex); trace_f2fs_fallocate(inode, mode, offset, len, ret); return ret; } static int f2fs_release_file(struct inode *inode, struct file *filp) { /* some remained atomic pages should discarded */ if (f2fs_is_atomic_file(inode)) commit_inmem_pages(inode, true); if (f2fs_is_volatile_file(inode)) { set_inode_flag(F2FS_I(inode), FI_DROP_CACHE); filemap_fdatawrite(inode->i_mapping); clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE); } return 0; } #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) { if (S_ISDIR(mode)) return flags; else if (S_ISREG(mode)) return flags & F2FS_REG_FLMASK; else return flags & F2FS_OTHER_FLMASK; } static int f2fs_ioc_getflags(struct file *filp, unsigned long arg) { struct inode *inode = file_inode(filp); struct f2fs_inode_info *fi = F2FS_I(inode); unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; return put_user(flags, (int __user *)arg); } static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) { struct inode *inode = file_inode(filp); struct f2fs_inode_info *fi = F2FS_I(inode); unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; unsigned int oldflags; int ret; ret = mnt_want_write_file(filp); if (ret) return ret; if (!inode_owner_or_capable(inode)) { ret = -EACCES; goto out; } if (get_user(flags, (int __user *)arg)) { ret = -EFAULT; goto out; } flags = f2fs_mask_flags(inode->i_mode, flags); mutex_lock(&inode->i_mutex); oldflags = fi->i_flags; if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { if (!capable(CAP_LINUX_IMMUTABLE)) { mutex_unlock(&inode->i_mutex); ret = -EPERM; goto out; } } flags = flags & FS_FL_USER_MODIFIABLE; flags |= oldflags & ~FS_FL_USER_MODIFIABLE; fi->i_flags = flags; mutex_unlock(&inode->i_mutex); f2fs_set_inode_flags(inode); inode->i_ctime = CURRENT_TIME; mark_inode_dirty(inode); out: mnt_drop_write_file(filp); return ret; } static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) { struct inode *inode = file_inode(filp); return put_user(inode->i_generation, (int __user *)arg); } static int f2fs_ioc_start_atomic_write(struct file *filp) { struct inode *inode = file_inode(filp); if (!inode_owner_or_capable(inode)) return -EACCES; f2fs_balance_fs(F2FS_I_SB(inode)); if (f2fs_is_atomic_file(inode)) return 0; set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); return f2fs_convert_inline_inode(inode); } static int f2fs_ioc_commit_atomic_write(struct file *filp) { struct inode *inode = file_inode(filp); int ret; if (!inode_owner_or_capable(inode)) return -EACCES; if (f2fs_is_volatile_file(inode)) return 0; ret = mnt_want_write_file(filp); if (ret) return ret; if (f2fs_is_atomic_file(inode)) commit_inmem_pages(inode, false); ret = f2fs_sync_file(filp, 0, LONG_MAX, 0); mnt_drop_write_file(filp); clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); return ret; } static int f2fs_ioc_start_volatile_write(struct file *filp) { struct inode *inode = file_inode(filp); if (!inode_owner_or_capable(inode)) return -EACCES; if (f2fs_is_volatile_file(inode)) return 0; set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); return f2fs_convert_inline_inode(inode); } static int f2fs_ioc_release_volatile_write(struct file *filp) { struct inode *inode = file_inode(filp); if (!inode_owner_or_capable(inode)) return -EACCES; if (!f2fs_is_volatile_file(inode)) return 0; punch_hole(inode, 0, F2FS_BLKSIZE); return 0; } static int f2fs_ioc_abort_volatile_write(struct file *filp) { struct inode *inode = file_inode(filp); int ret; if (!inode_owner_or_capable(inode)) return -EACCES; ret = mnt_want_write_file(filp); if (ret) return ret; f2fs_balance_fs(F2FS_I_SB(inode)); if (f2fs_is_atomic_file(inode)) { commit_inmem_pages(inode, false); clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); } if (f2fs_is_volatile_file(inode)) { clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); filemap_fdatawrite(inode->i_mapping); set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); } mnt_drop_write_file(filp); return ret; } static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) { struct inode *inode = file_inode(filp); struct super_block *sb = inode->i_sb; struct request_queue *q = bdev_get_queue(sb->s_bdev); struct fstrim_range range; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; if (!blk_queue_discard(q)) return -EOPNOTSUPP; if (copy_from_user(&range, (struct fstrim_range __user *)arg, sizeof(range))) return -EFAULT; range.minlen = max((unsigned int)range.minlen, q->limits.discard_granularity); ret = f2fs_trim_fs(F2FS_SB(sb), &range); if (ret < 0) return ret; if (copy_to_user((struct fstrim_range __user *)arg, &range, sizeof(range))) return -EFAULT; return 0; } long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { switch (cmd) { case F2FS_IOC_GETFLAGS: return f2fs_ioc_getflags(filp, arg); case F2FS_IOC_SETFLAGS: return f2fs_ioc_setflags(filp, arg); case F2FS_IOC_GETVERSION: return f2fs_ioc_getversion(filp, arg); case F2FS_IOC_START_ATOMIC_WRITE: return f2fs_ioc_start_atomic_write(filp); case F2FS_IOC_COMMIT_ATOMIC_WRITE: return f2fs_ioc_commit_atomic_write(filp); case F2FS_IOC_START_VOLATILE_WRITE: return f2fs_ioc_start_volatile_write(filp); case F2FS_IOC_RELEASE_VOLATILE_WRITE: return f2fs_ioc_release_volatile_write(filp); case F2FS_IOC_ABORT_VOLATILE_WRITE: return f2fs_ioc_abort_volatile_write(filp); case FITRIM: return f2fs_ioc_fitrim(filp, arg); default: return -ENOTTY; } } #ifdef CONFIG_COMPAT long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { switch (cmd) { case F2FS_IOC32_GETFLAGS: cmd = F2FS_IOC_GETFLAGS; break; case F2FS_IOC32_SETFLAGS: cmd = F2FS_IOC_SETFLAGS; break; 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 = new_sync_read, .write = new_sync_write, .read_iter = generic_file_read_iter, .write_iter = generic_file_write_iter, .open = generic_file_open, .release = f2fs_release_file, .mmap = f2fs_file_mmap, .fsync = f2fs_sync_file, .fallocate = f2fs_fallocate, .unlocked_ioctl = f2fs_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = f2fs_compat_ioctl, #endif .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, };