1 this patch implements feature which allows ext4 fs users (e.g. Lustre)
2 to store data in ext4 dirent.
3 data is stored in ext4 dirent after file-name, this space is accounted
4 in de->rec_len. flag EXT4_DIRENT_LUFID added to d_type if extra data
7 make use of dentry->d_fsdata to pass fid to ext4. so no
8 changes in ext4_add_entry() interface required.
10 Index: linux-stage/fs/ext4/dir.c
11 ===================================================================
12 --- linux-stage.orig/fs/ext4/dir.c
13 +++ linux-stage/fs/ext4/dir.c
14 @@ -70,11 +70,11 @@ int __ext4_check_dir_entry(const char *f
15 const int rlen = ext4_rec_len_from_disk(de->rec_len,
16 dir->i_sb->s_blocksize);
18 - if (unlikely(rlen < EXT4_DIR_REC_LEN(1)))
19 + if (unlikely(rlen < __EXT4_DIR_REC_LEN(1)))
20 error_msg = "rec_len is smaller than minimal";
21 else if (unlikely(rlen % 4 != 0))
22 error_msg = "rec_len % 4 != 0";
23 - else if (unlikely(rlen < EXT4_DIR_REC_LEN(de->name_len)))
24 + else if (unlikely(rlen < EXT4_DIR_REC_LEN(de)))
25 error_msg = "rec_len is too small for name_len";
26 else if (unlikely(((char *) de - buf) + rlen > size))
27 error_msg = "directory entry across range";
28 @@ -202,7 +202,7 @@ static int ext4_readdir(struct file *fil
29 * failure will be detected in the
30 * dirent test below. */
31 if (ext4_rec_len_from_disk(de->rec_len,
32 - sb->s_blocksize) < EXT4_DIR_REC_LEN(1))
33 + sb->s_blocksize) < __EXT4_DIR_REC_LEN(1))
35 i += ext4_rec_len_from_disk(de->rec_len,
37 @@ -421,12 +421,17 @@ int ext4_htree_store_dirent(struct file
38 struct fname *fname, *new_fn;
39 struct dir_private_info *info;
43 info = dir_file->private_data;
44 p = &info->root.rb_node;
46 /* Create and allocate the fname structure */
47 - len = sizeof(struct fname) + dirent->name_len + 1;
48 + if (dirent->file_type & EXT4_DIRENT_LUFID)
49 + extra_data = ext4_get_dirent_data_len(dirent);
51 + len = sizeof(struct fname) + dirent->name_len + extra_data + 1;
53 new_fn = kzalloc(len, GFP_KERNEL);
56 @@ -435,7 +440,7 @@ int ext4_htree_store_dirent(struct file
57 new_fn->inode = le32_to_cpu(dirent->inode);
58 new_fn->name_len = dirent->name_len;
59 new_fn->file_type = dirent->file_type;
60 - memcpy(new_fn->name, dirent->name, dirent->name_len);
61 + memcpy(new_fn->name, dirent->name, dirent->name_len + extra_data);
62 new_fn->name[dirent->name_len] = 0;
65 Index: linux-stage/fs/ext4/ext4.h
66 ===================================================================
67 --- linux-stage.orig/fs/ext4/ext4.h
68 +++ linux-stage/fs/ext4/ext4.h
69 @@ -960,6 +960,7 @@ struct ext4_inode_info {
70 #define EXT4_MOUNT_ERRORS_MASK 0x00070
71 #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
72 #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
73 +#define EXT4_MOUNT_DIRDATA 0x00200 /* Data in directory entries*/
74 #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
75 #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
76 #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
77 @@ -1538,6 +1539,7 @@ static inline void ext4_clear_state_flag
78 EXT4_FEATURE_INCOMPAT_64BIT| \
79 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
80 EXT4_FEATURE_INCOMPAT_MMP | \
81 + EXT4_FEATURE_INCOMPAT_DIRDATA| \
82 EXT4_FEATURE_INCOMPAT_INLINE_DATA)
83 #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
84 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
85 @@ -1644,6 +1646,43 @@ struct ext4_dir_entry_tail {
86 #define EXT4_FT_SYMLINK 7
89 +#define EXT4_FT_MASK 0xf
91 +#if EXT4_FT_MAX > EXT4_FT_MASK
92 +#error "conflicting EXT4_FT_MAX and EXT4_FT_MASK"
96 + * d_type has 4 unused bits, so it can hold four types data. these different
97 + * type of data (e.g. lustre data, high 32 bits of 64-bit inode number) can be
98 + * stored, in flag order, after file-name in ext4 dirent.
101 + * this flag is added to d_type if ext4 dirent has extra data after
102 + * filename. this data length is variable and length is stored in first byte
103 + * of data. data start after filename NUL byte.
104 + * This is used by Lustre FS.
106 +#define EXT4_DIRENT_LUFID 0x10
108 +#define EXT4_LUFID_MAGIC 0xAD200907UL
109 +struct ext4_dentry_param {
110 + __u32 edp_magic; /* EXT4_LUFID_MAGIC */
111 + char edp_len; /* size of edp_data in bytes */
112 + char edp_data[0]; /* packed array of data */
115 +static inline unsigned char *ext4_dentry_get_data(struct super_block *sb,
116 + struct ext4_dentry_param *p)
119 + if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_DIRDATA))
121 + if (p && p->edp_magic == EXT4_LUFID_MAGIC)
122 + return &p->edp_len;
127 #define EXT4_FT_DIR_CSUM 0xDE
129 @@ -1654,8 +1693,11 @@ struct ext4_dir_entry_tail {
131 #define EXT4_DIR_PAD 4
132 #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1)
133 -#define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \
134 +#define __EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \
136 +#define EXT4_DIR_REC_LEN(de) (__EXT4_DIR_REC_LEN((de)->name_len +\
137 + ext4_get_dirent_data_len(de)))
139 #define EXT4_MAX_REC_LEN ((1<<16)-1)
142 @@ -1991,11 +2033,11 @@ extern int ext4_find_dest_de(struct inod
143 struct buffer_head *bh,
144 void *buf, int buf_size,
145 const char *name, int namelen,
146 - struct ext4_dir_entry_2 **dest_de);
147 + struct ext4_dir_entry_2 **dest_de, int *dlen);
148 void ext4_insert_dentry(struct inode *inode,
149 struct ext4_dir_entry_2 *de,
151 - const char *name, int namelen);
152 + const char *name, int namelen, void *data);
153 static inline void ext4_update_dx_flag(struct inode *inode)
155 if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
156 @@ -2008,11 +2050,18 @@ static unsigned char ext4_filetype_table
158 static inline unsigned char get_dtype(struct super_block *sb, int filetype)
160 + int fl_index = filetype & EXT4_FT_MASK;
162 if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) ||
163 - (filetype >= EXT4_FT_MAX))
164 + (fl_index >= EXT4_FT_MAX))
167 - return ext4_filetype_table[filetype];
168 + if (!test_opt(sb, DIRDATA))
169 + return ext4_filetype_table[fl_index];
171 + return (ext4_filetype_table[fl_index]) |
172 + (filetype & EXT4_DIRENT_LUFID);
177 @@ -2158,6 +2207,8 @@ extern struct inode *ext4_create_inode(h
178 extern int ext4_delete_entry(handle_t *handle, struct inode * dir,
179 struct ext4_dir_entry_2 *de_del,
180 struct buffer_head *bh);
181 +extern int ext4_add_dot_dotdot(handle_t *handle, struct inode *dir,
182 + struct inode *inode, const void *, const void *);
183 extern int search_dir(struct buffer_head *bh,
186 @@ -2834,6 +2885,36 @@ extern struct mutex ext4__aio_mutex[EXT4
187 extern int ext4_resize_begin(struct super_block *sb);
188 extern void ext4_resize_end(struct super_block *sb);
191 + * Compute the total directory entry data length.
192 + * This includes the filename and an implicit NUL terminator (always present),
193 + * and optional extensions. Each extension has a bit set in the high 4 bits of
194 + * de->file_type, and the extension length is the first byte in each entry.
196 +static inline int ext4_get_dirent_data_len(struct ext4_dir_entry_2 *de)
198 + char *len = de->name + de->name_len + 1 /* NUL terminator */;
200 + __u8 extra_data_flags = (de->file_type & ~EXT4_FT_MASK) >> 4;
201 + struct ext4_dir_entry_tail *t = (struct ext4_dir_entry_tail *)de;
203 + if (!t->det_reserved_zero1 &&
204 + le16_to_cpu(t->det_rec_len) ==
205 + sizeof(struct ext4_dir_entry_tail) &&
206 + !t->det_reserved_zero2 &&
207 + t->det_reserved_ft == EXT4_FT_DIR_CSUM)
210 + while (extra_data_flags) {
211 + if (extra_data_flags & 1) {
212 + dlen += *len + (dlen == 0);
215 + extra_data_flags >>= 1;
220 #endif /* __KERNEL__ */
223 Index: linux-stage/fs/ext4/namei.c
224 ===================================================================
225 --- linux-stage.orig/fs/ext4/namei.c
226 +++ linux-stage/fs/ext4/namei.c
227 @@ -239,7 +239,8 @@ static unsigned dx_get_count(struct dx_e
228 static unsigned dx_get_limit(struct dx_entry *entries);
229 static void dx_set_count(struct dx_entry *entries, unsigned value);
230 static void dx_set_limit(struct dx_entry *entries, unsigned value);
231 -static unsigned dx_root_limit(struct inode *dir, unsigned infosize);
232 +static inline unsigned dx_root_limit(struct inode *dir,
233 + struct ext4_dir_entry_2 *dot_de, unsigned infosize);
234 static unsigned dx_node_limit(struct inode *dir);
235 static struct dx_frame *dx_probe(const struct qstr *d_name,
237 @@ -379,22 +380,23 @@ static struct dx_countlimit *get_dx_coun
239 struct ext4_dir_entry *dp;
240 struct dx_root_info *root;
242 + int count_offset, dot_rec_len, dotdot_rec_len;
244 if (le16_to_cpu(dirent->rec_len) == EXT4_BLOCK_SIZE(inode->i_sb))
246 - else if (le16_to_cpu(dirent->rec_len) == 12) {
247 - dp = (struct ext4_dir_entry *)(((void *)dirent) + 12);
249 + dot_rec_len = le16_to_cpu(dirent->rec_len);
250 + dp = (struct ext4_dir_entry *)(((void *)dirent) + dot_rec_len);
251 if (le16_to_cpu(dp->rec_len) !=
252 - EXT4_BLOCK_SIZE(inode->i_sb) - 12)
253 + EXT4_BLOCK_SIZE(inode->i_sb) - dot_rec_len)
255 - root = (struct dx_root_info *)(((void *)dp + 12));
256 + dotdot_rec_len = EXT4_DIR_REC_LEN((struct ext4_dir_entry_2 *)dp);
257 + root = (struct dx_root_info *)(((void *)dp + dotdot_rec_len));
258 if (root->reserved_zero ||
259 root->info_length != sizeof(struct dx_root_info))
264 + count_offset = 8 + dot_rec_len + dotdot_rec_len;
268 *offset = count_offset;
269 @@ -500,11 +501,12 @@ ext4_next_entry(struct ext4_dir_entry_2
271 struct dx_root_info *dx_get_dx_info(struct ext4_dir_entry_2 *de)
273 + BUG_ON(de->name_len != 1);
274 /* get dotdot first */
275 - de = (struct ext4_dir_entry_2 *)((char *)de + EXT4_DIR_REC_LEN(1));
276 + de = (struct ext4_dir_entry_2 *)((char *)de + EXT4_DIR_REC_LEN(de));
278 /* dx root info is after dotdot entry */
279 - de = (struct ext4_dir_entry_2 *)((char *)de + EXT4_DIR_REC_LEN(2));
280 + de = (struct ext4_dir_entry_2 *)((char *)de + EXT4_DIR_REC_LEN(de));
282 return (struct dx_root_info *)de;
284 @@ -549,10 +551,16 @@ static inline void dx_set_limit(struct d
285 ((struct dx_countlimit *) entries)->limit = cpu_to_le16(value);
288 -static inline unsigned dx_root_limit(struct inode *dir, unsigned infosize)
289 +static inline unsigned dx_root_limit(struct inode *dir,
290 + struct ext4_dir_entry_2 *dot_de, unsigned infosize)
292 - unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(1) -
293 - EXT4_DIR_REC_LEN(2) - infosize;
294 + struct ext4_dir_entry_2 *dotdot_de;
295 + unsigned entry_space;
297 + BUG_ON(dot_de->name_len != 1);
298 + dotdot_de = ext4_next_entry(dot_de, dir->i_sb->s_blocksize);
299 + entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(dot_de) -
300 + EXT4_DIR_REC_LEN(dotdot_de) - infosize;
302 if (ext4_has_metadata_csum(dir->i_sb))
303 entry_space -= sizeof(struct dx_tail);
304 @@ -561,7 +569,7 @@ static inline unsigned dx_root_limit(str
306 static inline unsigned dx_node_limit(struct inode *dir)
308 - unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(0);
309 + unsigned entry_space = dir->i_sb->s_blocksize - __EXT4_DIR_REC_LEN(0);
311 if (ext4_has_metadata_csum(dir->i_sb))
312 entry_space -= sizeof(struct dx_tail);
313 @@ -611,7 +619,7 @@ static struct stats dx_show_leaf(struct
314 printk(":%x.%u ", h.hash,
315 (unsigned) ((char *) de - base));
317 - space += EXT4_DIR_REC_LEN(de->name_len);
318 + space += EXT4_DIR_REC_LEN(de);
321 de = ext4_next_entry(de, size);
322 @@ -719,12 +727,15 @@ dx_probe(const struct qstr *d_name, stru
324 entries = (struct dx_entry *)(((char *)info) + info->info_length);
326 - if (dx_get_limit(entries) != dx_root_limit(dir,
327 - info->info_length)) {
328 + if (dx_get_limit(entries) !=
329 + dx_root_limit(dir, (struct ext4_dir_entry_2 *)bh->b_data,
330 + info->info_length)) {
331 ext4_warning(dir->i_sb, "dx entry: limit != root limit "
332 "inode #%lu: dx entry: limit %u != root limit %u",
333 dir->i_ino, dx_get_limit(entries),
334 - dx_root_limit(dir, info->info_length));
336 + (struct ext4_dir_entry_2 *)bh->b_data,
337 + info->info_length));
339 *err = ERR_BAD_DX_DIR;
341 @@ -916,7 +927,7 @@ static int htree_dirblock_to_tree(struct
342 de = (struct ext4_dir_entry_2 *) bh->b_data;
343 top = (struct ext4_dir_entry_2 *) ((char *) de +
344 dir->i_sb->s_blocksize -
345 - EXT4_DIR_REC_LEN(0));
346 + __EXT4_DIR_REC_LEN(0));
347 for (; de < top; de = ext4_next_entry(de, dir->i_sb->s_blocksize)) {
348 if (ext4_check_dir_entry(dir, NULL, de, bh,
349 bh->b_data, bh->b_size,
350 @@ -1508,7 +1519,7 @@ dx_move_dirents(char *from, char *to, st
352 struct ext4_dir_entry_2 *de = (struct ext4_dir_entry_2 *)
353 (from + (map->offs<<2));
354 - rec_len = EXT4_DIR_REC_LEN(de->name_len);
355 + rec_len = EXT4_DIR_REC_LEN(de);
356 memcpy (to, de, rec_len);
357 ((struct ext4_dir_entry_2 *) to)->rec_len =
358 ext4_rec_len_to_disk(rec_len, blocksize);
359 @@ -1532,7 +1543,7 @@ static struct ext4_dir_entry_2* dx_pack_
360 while ((char*)de < base + blocksize) {
361 next = ext4_next_entry(de, blocksize);
362 if (de->inode && de->name_len) {
363 - rec_len = EXT4_DIR_REC_LEN(de->name_len);
364 + rec_len = EXT4_DIR_REC_LEN(de);
366 memmove(to, de, rec_len);
367 to->rec_len = ext4_rec_len_to_disk(rec_len, blocksize);
368 @@ -1663,14 +1674,16 @@ int ext4_find_dest_de(struct inode *dir,
369 struct buffer_head *bh,
370 void *buf, int buf_size,
371 const char *name, int namelen,
372 - struct ext4_dir_entry_2 **dest_de)
373 + struct ext4_dir_entry_2 **dest_de, int *dlen)
375 struct ext4_dir_entry_2 *de;
376 - unsigned short reclen = EXT4_DIR_REC_LEN(namelen);
377 + unsigned short reclen = __EXT4_DIR_REC_LEN(namelen) +
378 + (dlen ? *dlen : 0);
380 unsigned int offset = 0;
383 + dlen ? *dlen = 0 : 0; /* default set to 0 */
384 de = (struct ext4_dir_entry_2 *)buf;
385 top = buf + buf_size - reclen;
386 while ((char *) de <= top) {
387 @@ -1679,10 +1692,26 @@ int ext4_find_dest_de(struct inode *dir,
389 if (ext4_match(namelen, name, de))
391 - nlen = EXT4_DIR_REC_LEN(de->name_len);
392 + nlen = EXT4_DIR_REC_LEN(de);
393 rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
394 if ((de->inode ? rlen - nlen : rlen) >= reclen)
396 + /* Then for dotdot entries, check for the smaller space
397 + * required for just the entry, no FID */
398 + if (namelen == 2 && memcmp(name, "..", 2) == 0) {
399 + if ((de->inode ? rlen - nlen : rlen) >=
400 + __EXT4_DIR_REC_LEN(namelen)) {
401 + /* set dlen=1 to indicate not
402 + * enough space store fid */
403 + dlen ? *dlen = 1 : 0;
406 + /* The new ".." entry must be written over the
407 + * previous ".." entry, which is the first
408 + * entry traversed by this scan. If it doesn't
409 + * fit, something is badly wrong, so -EIO. */
412 de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
415 @@ -1696,12 +1725,12 @@ int ext4_find_dest_de(struct inode *dir,
416 void ext4_insert_dentry(struct inode *inode,
417 struct ext4_dir_entry_2 *de,
419 - const char *name, int namelen)
420 + const char *name, int namelen, void *data)
425 - nlen = EXT4_DIR_REC_LEN(de->name_len);
426 + nlen = EXT4_DIR_REC_LEN(de);
427 rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
429 struct ext4_dir_entry_2 *de1 =
430 @@ -1715,6 +1744,11 @@ void ext4_insert_dentry(struct inode *in
431 ext4_set_de_type(inode->i_sb, de, inode->i_mode);
432 de->name_len = namelen;
433 memcpy(de->name, name, namelen);
435 + de->name[namelen] = 0;
436 + memcpy(&de->name[namelen + 1], data, *(char *)data);
437 + de->file_type |= EXT4_DIRENT_LUFID;
441 * Add a new entry into a directory (leaf) block. If de is non-NULL,
442 @@ -1733,15 +1767,20 @@ static int add_dirent_to_buf(handle_t *h
443 int namelen = dentry->d_name.len;
444 unsigned int blocksize = dir->i_sb->s_blocksize;
448 + unsigned char *data;
450 + data = ext4_dentry_get_data(inode->i_sb, (struct ext4_dentry_param *)
452 if (ext4_has_metadata_csum(inode->i_sb))
453 csum_size = sizeof(struct ext4_dir_entry_tail);
457 + dlen = (*data) + 1;
458 err = ext4_find_dest_de(dir, inode,
459 bh, bh->b_data, blocksize - csum_size,
460 - name, namelen, &de);
461 + name, namelen, &de, &dlen);
465 @@ -1753,7 +1792,10 @@ static int add_dirent_to_buf(handle_t *h
468 /* By now the buffer is marked for journaling */
469 - ext4_insert_dentry(inode, de, blocksize, name, namelen);
470 + /* If writing the short form of "dotdot", don't add the data section */
473 + ext4_insert_dentry(inode, de, blocksize, name, namelen, data);
476 * XXX shouldn't update any times until successful
477 @@ -1864,7 +1906,8 @@ static int make_indexed_dir(handle_t *ha
479 dx_set_block(entries, 1);
480 dx_set_count(entries, 1);
481 - dx_set_limit(entries, dx_root_limit(dir, sizeof(*dx_info)));
482 + dx_set_limit(entries, dx_root_limit(dir,
483 + dot_de, sizeof(*dx_info)));
485 /* Initialize as for dx_probe */
486 hinfo.hash_version = dx_info->hash_version;
487 @@ -1907,6 +1950,8 @@ static int ext4_update_dotdot(handle_t *
488 struct buffer_head *dir_block;
489 struct ext4_dir_entry_2 *de;
490 int len, journal = 0, err = 0;
495 return PTR_ERR(handle);
496 @@ -1922,19 +1967,24 @@ static int ext4_update_dotdot(handle_t *
497 /* the first item must be "." */
498 assert(de->name_len == 1 && de->name[0] == '.');
499 len = le16_to_cpu(de->rec_len);
500 - assert(len >= EXT4_DIR_REC_LEN(1));
501 - if (len > EXT4_DIR_REC_LEN(1)) {
502 + assert(len >= __EXT4_DIR_REC_LEN(1));
503 + if (len > __EXT4_DIR_REC_LEN(1)) {
504 BUFFER_TRACE(dir_block, "get_write_access");
505 err = ext4_journal_get_write_access(handle, dir_block);
510 - de->rec_len = cpu_to_le16(EXT4_DIR_REC_LEN(1));
511 + de->rec_len = cpu_to_le16(EXT4_DIR_REC_LEN(de));
514 - len -= EXT4_DIR_REC_LEN(1);
515 - assert(len == 0 || len >= EXT4_DIR_REC_LEN(2));
516 + len -= EXT4_DIR_REC_LEN(de);
517 + data = ext4_dentry_get_data(dir->i_sb,
518 + (struct ext4_dentry_param *)dentry->d_fsdata);
521 + assert(len == 0 || len >= __EXT4_DIR_REC_LEN(2 + dlen));
523 de = (struct ext4_dir_entry_2 *)
524 ((char *) de + le16_to_cpu(de->rec_len));
526 @@ -1948,10 +1998,15 @@ static int ext4_update_dotdot(handle_t *
528 de->rec_len = cpu_to_le16(len);
530 - assert(le16_to_cpu(de->rec_len) >= EXT4_DIR_REC_LEN(2));
531 + assert(le16_to_cpu(de->rec_len) >= __EXT4_DIR_REC_LEN(2));
533 strcpy(de->name, "..");
534 - ext4_set_de_type(dir->i_sb, de, S_IFDIR);
535 + if (data != NULL && ext4_get_dirent_data_len(de) >= dlen) {
537 + memcpy(&de->name[2 + 1], data, *data);
538 + ext4_set_de_type(dir->i_sb, de, S_IFDIR);
539 + de->file_type |= EXT4_DIRENT_LUFID;
544 @@ -2463,37 +2518,70 @@ err_unlock_inode:
549 + struct inode *inode;
554 struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
555 struct ext4_dir_entry_2 *de,
556 int blocksize, int csum_size,
557 unsigned int parent_ino, int dotdot_real_len)
559 + void *data1 = NULL, *data2 = NULL;
560 + int dot_reclen = 0;
562 + if (dotdot_real_len == 10) {
563 + struct tp_block *tpb = (struct tp_block *)inode;
564 + data1 = tpb->data1;
565 + data2 = tpb->data2;
566 + inode = tpb->inode;
567 + dotdot_real_len = 0;
569 de->inode = cpu_to_le32(inode->i_ino);
571 - de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len),
573 strcpy(de->name, ".");
574 ext4_set_de_type(inode->i_sb, de, S_IFDIR);
576 + /* get packed fid data*/
577 + data1 = ext4_dentry_get_data(inode->i_sb,
578 + (struct ext4_dentry_param *) data1);
581 + memcpy(&de->name[2], data1, *(char *) data1);
582 + de->file_type |= EXT4_DIRENT_LUFID;
584 + de->rec_len = cpu_to_le16(EXT4_DIR_REC_LEN(de));
585 + dot_reclen = cpu_to_le16(de->rec_len);
586 de = ext4_next_entry(de, blocksize);
587 de->inode = cpu_to_le32(parent_ino);
589 + strcpy(de->name, "..");
590 + ext4_set_de_type(inode->i_sb, de, S_IFDIR);
591 + data2 = ext4_dentry_get_data(inode->i_sb,
592 + (struct ext4_dentry_param *) data2);
595 + memcpy(&de->name[3], data2, *(char *) data2);
596 + de->file_type |= EXT4_DIRENT_LUFID;
598 if (!dotdot_real_len)
599 de->rec_len = ext4_rec_len_to_disk(blocksize -
600 - (csum_size + EXT4_DIR_REC_LEN(1)),
601 + (csum_size + dot_reclen),
604 de->rec_len = ext4_rec_len_to_disk(
605 - EXT4_DIR_REC_LEN(de->name_len), blocksize);
606 - strcpy(de->name, "..");
607 - ext4_set_de_type(inode->i_sb, de, S_IFDIR);
608 + EXT4_DIR_REC_LEN(de), blocksize);
610 return ext4_next_entry(de, blocksize);
613 static int ext4_init_new_dir(handle_t *handle, struct inode *dir,
614 - struct inode *inode)
615 + struct inode *inode,
616 + const void *data1, const void *data2)
618 + struct tp_block param;
619 struct buffer_head *dir_block = NULL;
620 struct ext4_dir_entry_2 *de;
621 struct ext4_dir_entry_tail *t;
622 @@ -2522,7 +2610,11 @@ static int ext4_init_new_dir(handle_t *h
625 de = (struct ext4_dir_entry_2 *)dir_block->b_data;
626 - ext4_init_dot_dotdot(inode, de, blocksize, csum_size, dir->i_ino, 0);
627 + param.inode = inode;
628 + param.data1 = (void *)data1;
629 + param.data2 = (void *)data2;
630 + ext4_init_dot_dotdot((struct inode *)(¶m), de, blocksize,
631 + csum_size, dir->i_ino, 10);
634 t = EXT4_DIRENT_TAIL(dir_block->b_data, blocksize);
635 @@ -2539,6 +2631,29 @@ out:
639 +/* Initialize @inode as a subdirectory of @dir, and add the
640 + * "." and ".." entries into the first directory block. */
641 +int ext4_add_dot_dotdot(handle_t *handle, struct inode *dir,
642 + struct inode *inode,
643 + const void *data1, const void *data2)
647 + if (IS_ERR(handle))
648 + return PTR_ERR(handle);
650 + if (IS_DIRSYNC(dir))
651 + ext4_handle_sync(handle);
653 + inode->i_op = &ext4_dir_inode_operations;
654 + inode->i_fop = &ext4_dir_operations;
655 + rc = ext4_init_new_dir(handle, dir, inode, data1, data2);
657 + rc = ext4_mark_inode_dirty(handle, inode);
660 +EXPORT_SYMBOL(ext4_add_dot_dotdot);
662 static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
665 @@ -2563,7 +2678,7 @@ retry:
667 inode->i_op = &ext4_dir_inode_operations;
668 inode->i_fop = &ext4_dir_operations;
669 - err = ext4_init_new_dir(handle, dir, inode);
670 + err = ext4_init_new_dir(handle, dir, inode, NULL, NULL);
672 goto out_clear_inode;
673 err = ext4_mark_inode_dirty(handle, inode);
674 @@ -2615,7 +2730,7 @@ static int empty_dir(struct inode *inode
678 - if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2)) {
679 + if (inode->i_size < __EXT4_DIR_REC_LEN(1) + __EXT4_DIR_REC_LEN(2)) {
680 EXT4_ERROR_INODE(inode, "invalid size");
683 Index: linux-stage/fs/ext4/inline.c
684 ===================================================================
685 --- linux-stage.orig/fs/ext4/inline.c
686 +++ linux-stage/fs/ext4/inline.c
687 @@ -998,17 +998,17 @@ static int ext4_add_dirent_to_inline(han
689 struct ext4_dir_entry_2 *de;
691 - reclen = EXT4_DIR_REC_LEN(namelen);
692 + reclen = __EXT4_DIR_REC_LEN(namelen);
693 err = ext4_find_dest_de(dir, inode, iloc->bh,
694 inline_start, inline_size,
695 - name, namelen, &de);
696 + name, namelen, &de, NULL);
700 err = ext4_journal_get_write_access(handle, iloc->bh);
703 - ext4_insert_dentry(inode, de, inline_size, name, namelen);
704 + ext4_insert_dentry(inode, de, inline_size, name, namelen, NULL);
706 ext4_show_inline_dir(dir, iloc->bh, inline_start, inline_size);
708 @@ -1078,7 +1078,7 @@ static int ext4_update_inline_dir(handle
709 int old_size = EXT4_I(dir)->i_inline_size - EXT4_MIN_INLINE_DATA_SIZE;
710 int new_size = get_max_inline_xattr_value_size(dir, iloc);
712 - if (new_size - old_size <= EXT4_DIR_REC_LEN(1))
713 + if (new_size - old_size <= __EXT4_DIR_REC_LEN(1))
716 ret = ext4_update_inline_data(handle, dir,
717 @@ -1347,7 +1347,7 @@ int htree_inlinedir_to_tree(struct file
719 strcpy(fake.name, ".");
720 fake.rec_len = ext4_rec_len_to_disk(
721 - EXT4_DIR_REC_LEN(fake.name_len),
722 + EXT4_DIR_REC_LEN(&fake),
724 ext4_set_de_type(inode->i_sb, &fake, S_IFDIR);
726 @@ -1357,7 +1357,7 @@ int htree_inlinedir_to_tree(struct file
728 strcpy(fake.name, "..");
729 fake.rec_len = ext4_rec_len_to_disk(
730 - EXT4_DIR_REC_LEN(fake.name_len),
731 + EXT4_DIR_REC_LEN(&fake),
733 ext4_set_de_type(inode->i_sb, &fake, S_IFDIR);
735 @@ -1452,8 +1452,8 @@ int ext4_read_inline_dir(struct file *fi
736 * So we will use extra_offset and extra_size to indicate them
737 * during the inline dir iteration.
739 - dotdot_offset = EXT4_DIR_REC_LEN(1);
740 - dotdot_size = dotdot_offset + EXT4_DIR_REC_LEN(2);
741 + dotdot_offset = __EXT4_DIR_REC_LEN(1);
742 + dotdot_size = dotdot_offset + __EXT4_DIR_REC_LEN(2);
743 extra_offset = dotdot_size - EXT4_INLINE_DOTDOT_SIZE;
744 extra_size = extra_offset + inline_size;
746 @@ -1488,7 +1488,7 @@ int ext4_read_inline_dir(struct file *fi
747 * failure will be detected in the
748 * dirent test below. */
749 if (ext4_rec_len_from_disk(de->rec_len, extra_size)
750 - < EXT4_DIR_REC_LEN(1))
751 + < __EXT4_DIR_REC_LEN(1))
753 i += ext4_rec_len_from_disk(de->rec_len,
755 Index: linux-stage/fs/ext4/super.c
756 ===================================================================
757 --- linux-stage.orig/fs/ext4/super.c
758 +++ linux-stage/fs/ext4/super.c
759 @@ -1133,7 +1133,7 @@ enum {
760 Opt_data_err_abort, Opt_data_err_ignore,
761 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
762 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,
763 - Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err,
764 + Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, Opt_dirdata,
765 Opt_usrquota, Opt_grpquota, Opt_i_version,
766 Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit,
767 Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity,
768 @@ -1199,6 +1199,7 @@ static const match_table_t tokens = {
769 {Opt_stripe, "stripe=%u"},
770 {Opt_delalloc, "delalloc"},
771 {Opt_nodelalloc, "nodelalloc"},
772 + {Opt_dirdata, "dirdata"},
773 {Opt_removed, "mblk_io_submit"},
774 {Opt_removed, "nomblk_io_submit"},
775 {Opt_block_validity, "block_validity"},
776 @@ -1409,6 +1410,7 @@ static const struct mount_opts {
777 {Opt_usrjquota, 0, MOPT_Q},
778 {Opt_grpjquota, 0, MOPT_Q},
779 {Opt_offusrjquota, 0, MOPT_Q},
780 + {Opt_dirdata, EXT4_MOUNT_DIRDATA, MOPT_SET},
781 {Opt_offgrpjquota, 0, MOPT_Q},
782 {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT},
783 {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT},