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-rw-r--r--fs/ext4/dir.c64
1 files changed, 35 insertions, 29 deletions
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index ec8e33b45219..3ca6a2b7632d 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -33,10 +33,10 @@ static unsigned char ext4_filetype_table[] = {
33}; 33};
34 34
35static int ext4_readdir(struct file *, void *, filldir_t); 35static int ext4_readdir(struct file *, void *, filldir_t);
36static int ext4_dx_readdir(struct file * filp, 36static int ext4_dx_readdir(struct file *filp,
37 void * dirent, filldir_t filldir); 37 void *dirent, filldir_t filldir);
38static int ext4_release_dir (struct inode * inode, 38static int ext4_release_dir(struct inode *inode,
39 struct file * filp); 39 struct file *filp);
40 40
41const struct file_operations ext4_dir_operations = { 41const struct file_operations ext4_dir_operations = {
42 .llseek = generic_file_llseek, 42 .llseek = generic_file_llseek,
@@ -61,12 +61,12 @@ static unsigned char get_dtype(struct super_block *sb, int filetype)
61} 61}
62 62
63 63
64int ext4_check_dir_entry (const char * function, struct inode * dir, 64int ext4_check_dir_entry(const char *function, struct inode *dir,
65 struct ext4_dir_entry_2 * de, 65 struct ext4_dir_entry_2 *de,
66 struct buffer_head * bh, 66 struct buffer_head *bh,
67 unsigned long offset) 67 unsigned long offset)
68{ 68{
69 const char * error_msg = NULL; 69 const char *error_msg = NULL;
70 const int rlen = ext4_rec_len_from_disk(de->rec_len); 70 const int rlen = ext4_rec_len_from_disk(de->rec_len);
71 71
72 if (rlen < EXT4_DIR_REC_LEN(1)) 72 if (rlen < EXT4_DIR_REC_LEN(1))
@@ -82,7 +82,7 @@ int ext4_check_dir_entry (const char * function, struct inode * dir,
82 error_msg = "inode out of bounds"; 82 error_msg = "inode out of bounds";
83 83
84 if (error_msg != NULL) 84 if (error_msg != NULL)
85 ext4_error (dir->i_sb, function, 85 ext4_error(dir->i_sb, function,
86 "bad entry in directory #%lu: %s - " 86 "bad entry in directory #%lu: %s - "
87 "offset=%lu, inode=%lu, rec_len=%d, name_len=%d", 87 "offset=%lu, inode=%lu, rec_len=%d, name_len=%d",
88 dir->i_ino, error_msg, offset, 88 dir->i_ino, error_msg, offset,
@@ -91,8 +91,8 @@ int ext4_check_dir_entry (const char * function, struct inode * dir,
91 return error_msg == NULL ? 1 : 0; 91 return error_msg == NULL ? 1 : 0;
92} 92}
93 93
94static int ext4_readdir(struct file * filp, 94static int ext4_readdir(struct file *filp,
95 void * dirent, filldir_t filldir) 95 void *dirent, filldir_t filldir)
96{ 96{
97 int error = 0; 97 int error = 0;
98 unsigned long offset; 98 unsigned long offset;
@@ -102,6 +102,7 @@ static int ext4_readdir(struct file * filp,
102 int err; 102 int err;
103 struct inode *inode = filp->f_path.dentry->d_inode; 103 struct inode *inode = filp->f_path.dentry->d_inode;
104 int ret = 0; 104 int ret = 0;
105 int dir_has_error = 0;
105 106
106 sb = inode->i_sb; 107 sb = inode->i_sb;
107 108
@@ -148,9 +149,13 @@ static int ext4_readdir(struct file * filp,
148 * of recovering data when there's a bad sector 149 * of recovering data when there's a bad sector
149 */ 150 */
150 if (!bh) { 151 if (!bh) {
151 ext4_error (sb, "ext4_readdir", 152 if (!dir_has_error) {
152 "directory #%lu contains a hole at offset %lu", 153 ext4_error(sb, __func__, "directory #%lu "
153 inode->i_ino, (unsigned long)filp->f_pos); 154 "contains a hole at offset %Lu",
155 inode->i_ino,
156 (unsigned long long) filp->f_pos);
157 dir_has_error = 1;
158 }
154 /* corrupt size? Maybe no more blocks to read */ 159 /* corrupt size? Maybe no more blocks to read */
155 if (filp->f_pos > inode->i_blocks << 9) 160 if (filp->f_pos > inode->i_blocks << 9)
156 break; 161 break;
@@ -187,14 +192,14 @@ revalidate:
187 while (!error && filp->f_pos < inode->i_size 192 while (!error && filp->f_pos < inode->i_size
188 && offset < sb->s_blocksize) { 193 && offset < sb->s_blocksize) {
189 de = (struct ext4_dir_entry_2 *) (bh->b_data + offset); 194 de = (struct ext4_dir_entry_2 *) (bh->b_data + offset);
190 if (!ext4_check_dir_entry ("ext4_readdir", inode, de, 195 if (!ext4_check_dir_entry("ext4_readdir", inode, de,
191 bh, offset)) { 196 bh, offset)) {
192 /* 197 /*
193 * On error, skip the f_pos to the next block 198 * On error, skip the f_pos to the next block
194 */ 199 */
195 filp->f_pos = (filp->f_pos | 200 filp->f_pos = (filp->f_pos |
196 (sb->s_blocksize - 1)) + 1; 201 (sb->s_blocksize - 1)) + 1;
197 brelse (bh); 202 brelse(bh);
198 ret = stored; 203 ret = stored;
199 goto out; 204 goto out;
200 } 205 }
@@ -218,12 +223,12 @@ revalidate:
218 break; 223 break;
219 if (version != filp->f_version) 224 if (version != filp->f_version)
220 goto revalidate; 225 goto revalidate;
221 stored ++; 226 stored++;
222 } 227 }
223 filp->f_pos += ext4_rec_len_from_disk(de->rec_len); 228 filp->f_pos += ext4_rec_len_from_disk(de->rec_len);
224 } 229 }
225 offset = 0; 230 offset = 0;
226 brelse (bh); 231 brelse(bh);
227 } 232 }
228out: 233out:
229 return ret; 234 return ret;
@@ -290,9 +295,9 @@ static void free_rb_tree_fname(struct rb_root *root)
290 parent = rb_parent(n); 295 parent = rb_parent(n);
291 fname = rb_entry(n, struct fname, rb_hash); 296 fname = rb_entry(n, struct fname, rb_hash);
292 while (fname) { 297 while (fname) {
293 struct fname * old = fname; 298 struct fname *old = fname;
294 fname = fname->next; 299 fname = fname->next;
295 kfree (old); 300 kfree(old);
296 } 301 }
297 if (!parent) 302 if (!parent)
298 root->rb_node = NULL; 303 root->rb_node = NULL;
@@ -331,7 +336,7 @@ int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
331 struct ext4_dir_entry_2 *dirent) 336 struct ext4_dir_entry_2 *dirent)
332{ 337{
333 struct rb_node **p, *parent = NULL; 338 struct rb_node **p, *parent = NULL;
334 struct fname * fname, *new_fn; 339 struct fname *fname, *new_fn;
335 struct dir_private_info *info; 340 struct dir_private_info *info;
336 int len; 341 int len;
337 342
@@ -388,19 +393,20 @@ int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
388 * for all entres on the fname linked list. (Normally there is only 393 * for all entres on the fname linked list. (Normally there is only
389 * one entry on the linked list, unless there are 62 bit hash collisions.) 394 * one entry on the linked list, unless there are 62 bit hash collisions.)
390 */ 395 */
391static int call_filldir(struct file * filp, void * dirent, 396static int call_filldir(struct file *filp, void *dirent,
392 filldir_t filldir, struct fname *fname) 397 filldir_t filldir, struct fname *fname)
393{ 398{
394 struct dir_private_info *info = filp->private_data; 399 struct dir_private_info *info = filp->private_data;
395 loff_t curr_pos; 400 loff_t curr_pos;
396 struct inode *inode = filp->f_path.dentry->d_inode; 401 struct inode *inode = filp->f_path.dentry->d_inode;
397 struct super_block * sb; 402 struct super_block *sb;
398 int error; 403 int error;
399 404
400 sb = inode->i_sb; 405 sb = inode->i_sb;
401 406
402 if (!fname) { 407 if (!fname) {
403 printk("call_filldir: called with null fname?!?\n"); 408 printk(KERN_ERR "ext4: call_filldir: called with "
409 "null fname?!?\n");
404 return 0; 410 return 0;
405 } 411 }
406 curr_pos = hash2pos(fname->hash, fname->minor_hash); 412 curr_pos = hash2pos(fname->hash, fname->minor_hash);
@@ -419,8 +425,8 @@ static int call_filldir(struct file * filp, void * dirent,
419 return 0; 425 return 0;
420} 426}
421 427
422static int ext4_dx_readdir(struct file * filp, 428static int ext4_dx_readdir(struct file *filp,
423 void * dirent, filldir_t filldir) 429 void *dirent, filldir_t filldir)
424{ 430{
425 struct dir_private_info *info = filp->private_data; 431 struct dir_private_info *info = filp->private_data;
426 struct inode *inode = filp->f_path.dentry->d_inode; 432 struct inode *inode = filp->f_path.dentry->d_inode;
@@ -511,7 +517,7 @@ finished:
511 return 0; 517 return 0;
512} 518}
513 519
514static int ext4_release_dir (struct inode * inode, struct file * filp) 520static int ext4_release_dir(struct inode *inode, struct file *filp)
515{ 521{
516 if (filp->private_data) 522 if (filp->private_data)
517 ext4_htree_free_dir_info(filp->private_data); 523 ext4_htree_free_dir_info(filp->private_data);
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-12 19:54:05 -0500