fs/erofs/inode.c

12 			      struct inode *inode, unsigned int *ofs)
14 	struct super_block *sb = inode->i_sb;
16 	struct erofs_inode *vi = EROFS_I(inode);
17 	const erofs_off_t inode_loc = erofs_iloc(inode);
31 		erofs_err(sb, "failed to get inode (nid: %llu) page, err %ld",
56 		/* check if the extended inode acrosses block boundary */
72 				erofs_err(sb, "failed to get inode payload block (nid: %llu), err %ld",
83 		inode->i_mode = le16_to_cpu(die->i_mode);
85 		i_uid_write(inode, le32_to_cpu(die->i_uid));
86 		i_gid_write(inode, le32_to_cpu(die->i_gid));
87 		set_nlink(inode, le32_to_cpu(die->i_nlink));
88 		/* each extended inode has its own timestamp */
89 		inode_set_ctime(inode, le64_to_cpu(die->i_mtime),
92 		inode->i_size = le64_to_cpu(die->i_size);
101 		inode->i_mode = le16_to_cpu(dic->i_mode);
103 		i_uid_write(inode, le16_to_cpu(dic->i_uid));
104 		i_gid_write(inode, le16_to_cpu(dic->i_gid));
105 		set_nlink(inode, le16_to_cpu(dic->i_nlink));
107 		inode_set_ctime(inode, sbi->build_time, sbi->build_time_nsec);
109 		inode->i_size = le32_to_cpu(dic->i_size);
112 		erofs_err(sb, "unsupported on-disk inode version %u of nid %llu",
118 	switch (inode->i_mode & S_IFMT) {
126 		inode->i_rdev = new_decode_dev(le32_to_cpu(iu.rdev));
130 		inode->i_rdev = 0;
133 		erofs_err(sb, "bogus i_mode (%o) @ nid %llu", inode->i_mode,
143 		/* fill chunked inode summary info */
154 	inode_set_mtime_to_ts(inode,
155 			      inode_set_atime_to_ts(inode, inode_get_ctime(inode)));
157 	inode->i_flags &= ~S_DAX;
158 	if (test_opt(&sbi->opt, DAX_ALWAYS) && S_ISREG(inode->i_mode) &&
161 		inode->i_flags |= S_DAX;
164 		/* measure inode.i_blocks as generic filesystems */
165 		inode->i_blocks = round_up(inode->i_size, sb->s_blocksize) >> 9;
167 		inode->i_blocks = nblks << (sb->s_blocksize_bits - 9);
177 static int erofs_fill_symlink(struct inode *inode, void *kaddr,
180 	struct erofs_inode *vi = EROFS_I(inode);
181 	unsigned int bsz = i_blocksize(inode);
186 	    inode->i_size >= bsz || inode->i_size < 0) {
187 		inode->i_op = &erofs_symlink_iops;
191 	lnk = kmalloc(inode->i_size + 1, GFP_KERNEL);
197 	if (m_pofs + inode->i_size > bsz) {
199 		erofs_err(inode->i_sb,
205 	memcpy(lnk, kaddr + m_pofs, inode->i_size);
206 	lnk[inode->i_size] = '\0';
208 	inode->i_link = lnk;
209 	inode->i_op = &erofs_fast_symlink_iops;
213 static int erofs_fill_inode(struct inode *inode)
215 	struct erofs_inode *vi = EROFS_I(inode);
221 	trace_erofs_fill_inode(inode);
223 	/* read inode base data from disk */
224 	kaddr = erofs_read_inode(&buf, inode, &ofs);
228 	/* setup the new inode */
229 	switch (inode->i_mode & S_IFMT) {
231 		inode->i_op = &erofs_generic_iops;
233 			inode->i_fop = &generic_ro_fops;
235 			inode->i_fop = &erofs_file_fops;
238 		inode->i_op = &erofs_dir_iops;
239 		inode->i_fop = &erofs_dir_fops;
240 		inode_nohighmem(inode);
243 		err = erofs_fill_symlink(inode, kaddr, ofs);
246 		inode_nohighmem(inode);
252 		inode->i_op = &erofs_generic_iops;
253 		init_special_inode(inode, inode->i_mode, inode->i_rdev);
262 		DO_ONCE_LITE_IF(inode->i_blkbits != PAGE_SHIFT,
263 			  erofs_info, inode->i_sb,
265 		inode->i_mapping->a_ops = &z_erofs_aops;
272 	inode->i_mapping->a_ops = &erofs_raw_access_aops;
273 	mapping_set_large_folios(inode->i_mapping);
275 	if (erofs_is_fscache_mode(inode->i_sb))
276 		inode->i_mapping->a_ops = &erofs_fscache_access_aops;
297 static int erofs_iget5_eq(struct inode *inode, void *opaque)
299 	return EROFS_I(inode)->nid == *(erofs_nid_t *)opaque;
302 static int erofs_iget5_set(struct inode *inode, void *opaque)
306 	inode->i_ino = erofs_squash_ino(nid);
307 	EROFS_I(inode)->nid = nid;
311 struct inode *erofs_iget(struct super_block *sb, erofs_nid_t nid)
313 	struct inode *inode;
315 	inode = iget5_locked(sb, erofs_squash_ino(nid), erofs_iget5_eq,
317 	if (!inode)
320 	if (inode->i_state & I_NEW) {
321 		int err = erofs_fill_inode(inode);
324 			iget_failed(inode);
327 		unlock_new_inode(inode);
329 	return inode;
336 	struct inode *const inode = d_inode(path->dentry);
338 	if (erofs_inode_is_data_compressed(EROFS_I(inode)->datalayout))
345 	generic_fillattr(idmap, request_mask, inode, stat);