| /* |
| * fs/f2fs/file.c |
| * |
| * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| * http://www.samsung.com/ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #include <linux/fs.h> |
| #include <linux/f2fs_fs.h> |
| #include <linux/stat.h> |
| #include <linux/buffer_head.h> |
| #include <linux/writeback.h> |
| #include <linux/blkdev.h> |
| #include <linux/falloc.h> |
| #include <linux/types.h> |
| #include <linux/compat.h> |
| #include <linux/uaccess.h> |
| #include <linux/mount.h> |
| #include <linux/pagevec.h> |
| |
| #include "f2fs.h" |
| #include "node.h" |
| #include "segment.h" |
| #include "xattr.h" |
| #include "acl.h" |
| #include <trace/events/f2fs.h> |
| |
| static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, |
| struct vm_fault *vmf) |
| { |
| struct page *page = vmf->page; |
| struct inode *inode = file_inode(vma->vm_file); |
| struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
| struct dnode_of_data dn; |
| int err; |
| |
| f2fs_balance_fs(sbi); |
| |
| sb_start_pagefault(inode->i_sb); |
| |
| /* block allocation */ |
| f2fs_lock_op(sbi); |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| err = f2fs_reserve_block(&dn, page->index); |
| f2fs_unlock_op(sbi); |
| if (err) |
| goto out; |
| |
| 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, |
| .remap_pages = generic_file_remap_pages, |
| }; |
| |
| 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; |
| } |
| |
| 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_SB(inode->i_sb); |
| 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); |
| ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
| if (ret) { |
| trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
| return ret; |
| } |
| |
| /* guarantee free sections for fsync */ |
| f2fs_balance_fs(sbi); |
| |
| down_read(&fi->i_sem); |
| |
| /* |
| * Both of fdatasync() and fsync() are able to be recovered from |
| * sudden-power-off. |
| */ |
| 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; |
| |
| up_read(&fi->i_sem); |
| |
| if (need_cp) { |
| nid_t pino; |
| |
| /* all the dirty node pages should be flushed for POR */ |
| ret = f2fs_sync_fs(inode->i_sb, 1); |
| |
| down_write(&fi->i_sem); |
| F2FS_I(inode)->xattr_ver = 0; |
| if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
| get_parent_ino(inode, &pino)) { |
| F2FS_I(inode)->i_pino = pino; |
| file_got_pino(inode); |
| up_write(&fi->i_sem); |
| mark_inode_dirty_sync(inode); |
| ret = f2fs_write_inode(inode, NULL); |
| if (ret) |
| goto out; |
| } else { |
| up_write(&fi->i_sem); |
| } |
| } else { |
| /* if there is no written node page, write its inode page */ |
| while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { |
| if (fsync_mark_done(sbi, inode->i_ino)) |
| goto out; |
| mark_inode_dirty_sync(inode); |
| ret = f2fs_write_inode(inode, NULL); |
| if (ret) |
| goto out; |
| } |
| ret = wait_on_node_pages_writeback(sbi, inode->i_ino); |
| if (ret) |
| goto out; |
| ret = f2fs_issue_flush(F2FS_SB(inode->i_sb)); |
| } |
| out: |
| trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
| 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)) { |
| 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 is not exist */ |
| if (whence == SEEK_DATA) { |
| pgofs = PGOFS_OF_NEXT_DNODE(pgofs, |
| F2FS_I(inode)); |
| continue; |
| } else { |
| goto found; |
| } |
| } |
| |
| end_offset = IS_INODE(dn.node_page) ? |
| ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK; |
| |
| /* find data/hole in dnode block */ |
| for (; dn.ofs_in_node < end_offset; |
| dn.ofs_in_node++, pgofs++, |
| data_ofs = 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: |
| return f2fs_seek_block(file, offset, whence); |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
| { |
| 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_SB(dn->inode->i_sb); |
| 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; |
| |
| update_extent_cache(NULL_ADDR, 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 void truncate_partial_data_page(struct inode *inode, u64 from) |
| { |
| unsigned offset = from & (PAGE_CACHE_SIZE - 1); |
| struct page *page; |
| |
| if (!offset) |
| return; |
| |
| page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
| if (IS_ERR(page)) |
| return; |
| |
| lock_page(page); |
| if (unlikely(page->mapping != inode->i_mapping)) { |
| f2fs_put_page(page, 1); |
| return; |
| } |
| f2fs_wait_on_page_writeback(page, DATA); |
| zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
| set_page_dirty(page); |
| f2fs_put_page(page, 1); |
| } |
| |
| int truncate_blocks(struct inode *inode, u64 from) |
| { |
| struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
| unsigned int blocksize = inode->i_sb->s_blocksize; |
| struct dnode_of_data dn; |
| pgoff_t free_from; |
| int count = 0, err = 0; |
| |
| trace_f2fs_truncate_blocks_enter(inode, from); |
| |
| if (f2fs_has_inline_data(inode)) |
| goto done; |
| |
| free_from = (pgoff_t) |
| ((from + blocksize - 1) >> (sbi->log_blocksize)); |
| |
| f2fs_lock_op(sbi); |
| |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
| if (err) { |
| if (err == -ENOENT) |
| goto free_next; |
| f2fs_unlock_op(sbi); |
| trace_f2fs_truncate_blocks_exit(inode, err); |
| return err; |
| } |
| |
| count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
| |
| count -= dn.ofs_in_node; |
| f2fs_bug_on(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); |
| f2fs_unlock_op(sbi); |
| done: |
| /* lastly zero out the first data page */ |
| 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); |
| |
| if (!truncate_blocks(inode, i_size_read(inode))) { |
| 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) && |
| attr->ia_size != i_size_read(inode)) { |
| err = f2fs_convert_inline_data(inode, attr->ia_size); |
| if (err) |
| return err; |
| |
| truncate_setsize(inode, attr->ia_size); |
| f2fs_truncate(inode); |
| f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
| } |
| |
| __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 |
| }; |
| |
| static void fill_zero(struct inode *inode, pgoff_t index, |
| loff_t start, loff_t len) |
| { |
| struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
| 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; |
| |
| ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1); |
| 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_SB(inode->i_sb); |
| |
| 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_SB(inode->i_sb); |
| 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_data(inode, offset + len); |
| 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); |
| |
| for (index = pg_start; index <= pg_end; index++) { |
| struct dnode_of_data dn; |
| |
| f2fs_lock_op(sbi); |
| set_new_dnode(&dn, inode, NULL, NULL, 0); |
| ret = f2fs_reserve_block(&dn, index); |
| f2fs_unlock_op(sbi); |
| if (ret) |
| break; |
| |
| 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); |
| } |
| |
| 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; |
| } |
| |
| #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; |
| } |
| |
| long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct f2fs_inode_info *fi = F2FS_I(inode); |
| unsigned int flags; |
| int ret; |
| |
| switch (cmd) { |
| case F2FS_IOC_GETFLAGS: |
| flags = fi->i_flags & FS_FL_USER_VISIBLE; |
| return put_user(flags, (int __user *) arg); |
| case F2FS_IOC_SETFLAGS: |
| { |
| unsigned int oldflags; |
| |
| 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; |
| } |
| 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 = do_sync_read, |
| .write = do_sync_write, |
| .aio_read = generic_file_aio_read, |
| .aio_write = generic_file_aio_write, |
| .open = generic_file_open, |
| .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 = generic_file_splice_write, |
| }; |