Lines Matching refs:iter
19 static int udf_verify_fi(struct udf_fileident_iter *iter)
23 if (iter->fi.descTag.tagIdent != cpu_to_le16(TAG_IDENT_FID)) {
24 udf_err(iter->dir->i_sb,
26 iter->dir->i_ino, (unsigned long long)iter->pos,
27 le16_to_cpu(iter->fi.descTag.tagIdent));
30 len = udf_dir_entry_len(&iter->fi);
31 if (le16_to_cpu(iter->fi.lengthOfImpUse) & 3) {
32 udf_err(iter->dir->i_sb,
34 iter->dir->i_ino, (unsigned long long)iter->pos);
42 if (len > 1 << iter->dir->i_blkbits) {
43 udf_err(iter->dir->i_sb,
45 iter->dir->i_ino, len, (unsigned long long)iter->pos);
48 if (iter->pos + len > iter->dir->i_size) {
49 udf_err(iter->dir->i_sb,
51 iter->dir->i_ino, (unsigned long long)iter->pos);
54 if (udf_dir_entry_len(&iter->fi) !=
55 sizeof(struct tag) + le16_to_cpu(iter->fi.descTag.descCRCLength)) {
56 udf_err(iter->dir->i_sb,
58 iter->dir->i_ino,
59 (unsigned)le16_to_cpu(iter->fi.descTag.descCRCLength),
60 (unsigned)(udf_dir_entry_len(&iter->fi) -
67 static int udf_copy_fi(struct udf_fileident_iter *iter)
69 struct udf_inode_info *iinfo = UDF_I(iter->dir);
70 u32 blksize = 1 << iter->dir->i_blkbits;
75 if (iter->pos >= iter->dir->i_size) {
76 iter->name = NULL;
79 if (iter->dir->i_size < iter->pos + sizeof(struct fileIdentDesc)) {
80 udf_err(iter->dir->i_sb,
82 iter->dir->i_ino);
86 memcpy(&iter->fi, iinfo->i_data + iinfo->i_lenEAttr + iter->pos,
88 err = udf_verify_fi(iter);
91 iter->name = iinfo->i_data + iinfo->i_lenEAttr + iter->pos +
93 le16_to_cpu(iter->fi.lengthOfImpUse);
97 off = iter->pos & (blksize - 1);
99 memcpy(&iter->fi, iter->bh[0]->b_data + off, len);
101 memcpy((char *)(&iter->fi) + len, iter->bh[1]->b_data,
103 err = udf_verify_fi(iter);
109 le16_to_cpu(iter->fi.lengthOfImpUse);
110 if (off + udf_dir_entry_len(&iter->fi) <= blksize) {
111 iter->name = iter->bh[0]->b_data + nameoff;
113 iter->name = iter->bh[1]->b_data + (nameoff - blksize);
115 iter->name = iter->namebuf;
117 memcpy(iter->name, iter->bh[0]->b_data + nameoff, len);
118 memcpy(iter->name + len, iter->bh[1]->b_data,
119 iter->fi.lengthFileIdent - len);
125 static void udf_readahead_dir(struct udf_fileident_iter *iter)
127 unsigned int ralen = 16 >> (iter->dir->i_blkbits - 9);
132 if (iter->loffset & (ralen - 1))
135 if (iter->loffset + ralen > (iter->elen >> iter->dir->i_blkbits))
136 ralen = (iter->elen >> iter->dir->i_blkbits) - iter->loffset;
139 blk = udf_get_lb_pblock(iter->dir->i_sb, &iter->eloc,
140 iter->loffset + i);
141 tmp = sb_getblk(iter->dir->i_sb, blk);
154 static struct buffer_head *udf_fiiter_bread_blk(struct udf_fileident_iter *iter)
158 udf_readahead_dir(iter);
159 blk = udf_get_lb_pblock(iter->dir->i_sb, &iter->eloc, iter->loffset);
160 return sb_bread(iter->dir->i_sb, blk);
167 static int udf_fiiter_advance_blk(struct udf_fileident_iter *iter)
169 iter->loffset++;
170 if (iter->loffset < DIV_ROUND_UP(iter->elen, 1<<iter->dir->i_blkbits))
173 iter->loffset = 0;
174 if (udf_next_aext(iter->dir, &iter->epos, &iter->eloc, &iter->elen, 1)
176 if (iter->pos == iter->dir->i_size) {
177 iter->elen = 0;
180 udf_err(iter->dir->i_sb,
182 (unsigned long long)iter->pos, iter->dir->i_ino);
188 static int udf_fiiter_load_bhs(struct udf_fileident_iter *iter)
190 int blksize = 1 << iter->dir->i_blkbits;
191 int off = iter->pos & (blksize - 1);
196 if (!iter->bh[0] && iter->elen) {
197 iter->bh[0] = udf_fiiter_bread_blk(iter);
198 if (!iter->bh[0]) {
202 if (!buffer_uptodate(iter->bh[0])) {
208 if (iter->pos >= iter->dir->i_size)
213 fi = (struct fileIdentDesc *)(iter->bh[0]->b_data + off);
217 err = udf_fiiter_advance_blk(iter);
220 iter->bh[1] = udf_fiiter_bread_blk(iter);
221 if (!iter->bh[1]) {
225 if (!buffer_uptodate(iter->bh[1])) {
232 brelse(iter->bh[0]);
233 brelse(iter->bh[1]);
234 iter->bh[0] = iter->bh[1] = NULL;
238 int udf_fiiter_init(struct udf_fileident_iter *iter, struct inode *dir,
244 iter->dir = dir;
245 iter->bh[0] = iter->bh[1] = NULL;
246 iter->pos = pos;
247 iter->elen = 0;
248 iter->epos.bh = NULL;
249 iter->name = NULL;
255 iter->namebuf = kmalloc(UDF_NAME_LEN_CS0, GFP_KERNEL | __GFP_NOFAIL);
258 err = udf_copy_fi(iter);
262 if (inode_bmap(dir, iter->pos >> dir->i_blkbits, &iter->epos,
263 &iter->eloc, &iter->elen, &iter->loffset) !=
273 err = udf_fiiter_load_bhs(iter);
276 err = udf_copy_fi(iter);
279 udf_fiiter_release(iter);
283 int udf_fiiter_advance(struct udf_fileident_iter *iter)
286 int blksize = 1 << iter->dir->i_blkbits;
289 oldoff = iter->pos & (blksize - 1);
290 len = udf_dir_entry_len(&iter->fi);
291 iter->pos += len;
292 if (UDF_I(iter->dir)->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
294 brelse(iter->bh[0]);
295 iter->bh[0] = NULL;
297 if (iter->bh[1]) {
298 iter->bh[0] = iter->bh[1];
299 iter->bh[1] = NULL;
301 err = udf_fiiter_advance_blk(iter);
306 err = udf_fiiter_load_bhs(iter);
310 return udf_copy_fi(iter);
313 void udf_fiiter_release(struct udf_fileident_iter *iter)
315 iter->dir = NULL;
316 brelse(iter->bh[0]);
317 brelse(iter->bh[1]);
318 iter->bh[0] = iter->bh[1] = NULL;
319 kfree(iter->namebuf);
320 iter->namebuf = NULL;
400 void udf_fiiter_write_fi(struct udf_fileident_iter *iter, uint8_t *impuse)
402 struct udf_inode_info *iinfo = UDF_I(iter->dir);
405 int blksize = 1 << iter->dir->i_blkbits;
407 off = iter->pos & (blksize - 1);
410 len1 = iter->dir->i_size;
412 buf1 = iter->bh[0]->b_data;
414 if (iter->bh[1]) {
415 buf2 = iter->bh[1]->b_data;
420 udf_copy_fi_to_bufs(buf1, len1, buf2, len2, off, &iter->fi, impuse,
421 iter->name == iter->namebuf ? iter->name : NULL);
424 mark_inode_dirty(iter->dir);
426 mark_buffer_dirty_inode(iter->bh[0], iter->dir);
427 if (iter->bh[1])
428 mark_buffer_dirty_inode(iter->bh[1], iter->dir);
430 inode_inc_iversion(iter->dir);
433 void udf_fiiter_update_elen(struct udf_fileident_iter *iter, uint32_t new_elen)
435 struct udf_inode_info *iinfo = UDF_I(iter->dir);
436 int diff = new_elen - iter->elen;
439 if (!iter->elen)
441 iter->elen = new_elen;
443 iter->epos.offset -= sizeof(struct short_ad);
445 iter->epos.offset -= sizeof(struct long_ad);
446 udf_write_aext(iter->dir, &iter->epos, &iter->eloc, iter->elen, 1);
448 mark_inode_dirty(iter->dir);
451 /* Append new block to directory. @iter is expected to point at EOF */
452 int udf_fiiter_append_blk(struct udf_fileident_iter *iter)
454 struct udf_inode_info *iinfo = UDF_I(iter->dir);
455 int blksize = 1 << iter->dir->i_blkbits;
458 uint32_t old_elen = iter->elen;
465 udf_fiiter_update_elen(iter, ALIGN(iter->elen, blksize));
468 block = iinfo->i_lenExtents >> iter->dir->i_blkbits;
469 bh = udf_bread(iter->dir, block, 1, &err);
471 udf_fiiter_update_elen(iter, old_elen);
474 if (inode_bmap(iter->dir, block, &iter->epos, &iter->eloc, &iter->elen,
475 &iter->loffset) != (EXT_RECORDED_ALLOCATED >> 30)) {
476 udf_err(iter->dir->i_sb,
478 (unsigned long long)block, iter->dir->i_ino);
481 if (!(iter->pos & (blksize - 1))) {
482 brelse(iter->bh[0]);
483 iter->bh[0] = bh;
485 iter->bh[1] = bh;