1 |
robbat2 09/01/02 01:46:35 |
2 |
|
3 |
Modified: ChangeLog |
4 |
Added: 850_all_grub-0.97_ext4.patch |
5 |
Log: |
6 |
Add ext4 patch now that it is tested. |
7 |
|
8 |
Revision Changes Path |
9 |
1.4 src/patchsets/grub/0.97/ChangeLog |
10 |
|
11 |
file : http://sources.gentoo.org/viewcvs.py/gentoo/src/patchsets/grub/0.97/ChangeLog?rev=1.4&view=markup |
12 |
plain: http://sources.gentoo.org/viewcvs.py/gentoo/src/patchsets/grub/0.97/ChangeLog?rev=1.4&content-type=text/plain |
13 |
diff : http://sources.gentoo.org/viewcvs.py/gentoo/src/patchsets/grub/0.97/ChangeLog?r1=1.3&r2=1.4 |
14 |
|
15 |
Index: ChangeLog |
16 |
=================================================================== |
17 |
RCS file: /var/cvsroot/gentoo/src/patchsets/grub/0.97/ChangeLog,v |
18 |
retrieving revision 1.3 |
19 |
retrieving revision 1.4 |
20 |
diff -p -w -b -B -u -u -r1.3 -r1.4 |
21 |
--- ChangeLog 2 Jan 2009 00:43:45 -0000 1.3 |
22 |
+++ ChangeLog 2 Jan 2009 01:46:35 -0000 1.4 |
23 |
@@ -1,6 +1,10 @@ |
24 |
# ChangeLog for grub patchset |
25 |
# Copyright 1999-2009 Gentoo Foundation; Distributed under the GPL v2 |
26 |
-# $Header: /var/cvsroot/gentoo/src/patchsets/grub/0.97/ChangeLog,v 1.3 2009/01/02 00:43:45 robbat2 Exp $ |
27 |
+# $Header: /var/cvsroot/gentoo/src/patchsets/grub/0.97/ChangeLog,v 1.4 2009/01/02 01:46:35 robbat2 Exp $ |
28 |
+ |
29 |
+ 02 Jan 2009; Robin H. Johnson <robbat2@g.o> |
30 |
+ +850_all_grub-0.97_ext4.patch: |
31 |
+ Add ext4 patch now that it is tested. |
32 |
|
33 |
02 Jan 2009; Robin H. Johnson <robbat2@g.o> |
34 |
820_all_grub-0.97-cvs-sync.patch: |
35 |
|
36 |
|
37 |
|
38 |
1.1 src/patchsets/grub/0.97/850_all_grub-0.97_ext4.patch |
39 |
|
40 |
file : http://sources.gentoo.org/viewcvs.py/gentoo/src/patchsets/grub/0.97/850_all_grub-0.97_ext4.patch?rev=1.1&view=markup |
41 |
plain: http://sources.gentoo.org/viewcvs.py/gentoo/src/patchsets/grub/0.97/850_all_grub-0.97_ext4.patch?rev=1.1&content-type=text/plain |
42 |
|
43 |
Index: 850_all_grub-0.97_ext4.patch |
44 |
=================================================================== |
45 |
Gentoo bug #250829 - Include support for booting from ext4 partitions. |
46 |
|
47 |
This is the respun and tested patch adapted from |
48 |
http://code.google.com/p/grub4ext4/ so that it will apply with the rest of the |
49 |
Gentoo patches. |
50 |
|
51 |
Tested with: |
52 |
/boot on ext2 |
53 |
/boot on ext3 |
54 |
/boot on ext4 |
55 |
/ on ext4 (no seperate /boot) |
56 |
|
57 |
Patch ported by Diego E. Pettenò (flameeyes) |
58 |
Testing by Robin H. Johnson (robbat2) |
59 |
|
60 |
Signed-off-by: Diego E. 'Flameeyes' Pettenò <flameeyes@g.o> |
61 |
Signed-off-by: Robin H. Johnson <robbat2@g.o> |
62 |
|
63 |
Index: grub-0.97/stage2/fsys_ext2fs.c |
64 |
=================================================================== |
65 |
--- grub-0.97.orig/stage2/fsys_ext2fs.c |
66 |
+++ grub-0.97/stage2/fsys_ext2fs.c |
67 |
@@ -41,6 +41,7 @@ typedef __signed__ short __s16; |
68 |
typedef unsigned short __u16; |
69 |
typedef __signed__ int __s32; |
70 |
typedef unsigned int __u32; |
71 |
+typedef unsigned long long __u64; |
72 |
|
73 |
/* |
74 |
* Constants relative to the data blocks, from ext2_fs.h |
75 |
@@ -61,9 +62,9 @@ struct ext2_super_block |
76 |
__u32 s_free_inodes_count; /* Free inodes count */ |
77 |
__u32 s_first_data_block; /* First Data Block */ |
78 |
__u32 s_log_block_size; /* Block size */ |
79 |
- __s32 s_log_frag_size; /* Fragment size */ |
80 |
+ __s32 s_obso_log_frag_size; /* Obsoleted Fragment size */ |
81 |
__u32 s_blocks_per_group; /* # Blocks per group */ |
82 |
- __u32 s_frags_per_group; /* # Fragments per group */ |
83 |
+ __u32 s_obso_frags_per_group; /* Obsoleted Fragments per group */ |
84 |
__u32 s_inodes_per_group; /* # Inodes per group */ |
85 |
__u32 s_mtime; /* Mount time */ |
86 |
__u32 s_wtime; /* Write time */ |
87 |
@@ -72,7 +73,7 @@ struct ext2_super_block |
88 |
__u16 s_magic; /* Magic signature */ |
89 |
__u16 s_state; /* File system state */ |
90 |
__u16 s_errors; /* Behaviour when detecting errors */ |
91 |
- __u16 s_pad; |
92 |
+ __u16 s_minor_rev_level; /* minor revision level */ |
93 |
__u32 s_lastcheck; /* time of last check */ |
94 |
__u32 s_checkinterval; /* max. time between checks */ |
95 |
__u32 s_creator_os; /* OS */ |
96 |
@@ -119,7 +120,7 @@ struct ext2_super_block |
97 |
__u32 s_hash_seed[4]; /* HTREE hash seed */ |
98 |
__u8 s_def_hash_version; /* Default hash version to use */ |
99 |
__u8 s_jnl_backup_type; /* Default type of journal backup */ |
100 |
- __u16 s_reserved_word_pad; |
101 |
+ __u16 s_desc_size; /* size of group descriptor */ |
102 |
__u32 s_default_mount_opts; |
103 |
__u32 s_first_meta_bg; /* First metablock group */ |
104 |
__u32 s_mkfs_time; /* When the filesystem was created */ |
105 |
@@ -127,7 +128,7 @@ struct ext2_super_block |
106 |
__u32 s_reserved[172]; /* Padding to the end of the block */ |
107 |
}; |
108 |
|
109 |
-struct ext2_group_desc |
110 |
+struct ext4_group_desc |
111 |
{ |
112 |
__u32 bg_block_bitmap; /* Blocks bitmap block */ |
113 |
__u32 bg_inode_bitmap; /* Inodes bitmap block */ |
114 |
@@ -135,8 +136,18 @@ struct ext2_group_desc |
115 |
__u16 bg_free_blocks_count; /* Free blocks count */ |
116 |
__u16 bg_free_inodes_count; /* Free inodes count */ |
117 |
__u16 bg_used_dirs_count; /* Directories count */ |
118 |
- __u16 bg_pad; |
119 |
- __u32 bg_reserved[3]; |
120 |
+ __u16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ |
121 |
+ __u32 bg_reserved[2]; /* Likely block/inode bitmap checksum */ |
122 |
+ __u16 bg_itable_unused; /* Unused inodes count */ |
123 |
+ __u16 bg_checksum; /* crc16(sb_uuid+group+desc) */ |
124 |
+ __u32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ |
125 |
+ __u32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ |
126 |
+ __u32 bg_inode_table_hi; /* Inodes table block MSB */ |
127 |
+ __u16 bg_free_blocks_count_hi;/* Free blocks count MSB */ |
128 |
+ __u16 bg_free_inodes_count_hi;/* Free inodes count MSB */ |
129 |
+ __u16 bg_used_dirs_count_hi; /* Directories count MSB */ |
130 |
+ __u16 bg_itable_unused_hi; /* Unused inodes count MSB */ |
131 |
+ __u32 bg_reserved2[3]; |
132 |
}; |
133 |
|
134 |
struct ext2_inode |
135 |
@@ -174,22 +185,22 @@ struct ext2_inode |
136 |
__u32 i_block[EXT2_N_BLOCKS]; /* 40: Pointers to blocks */ |
137 |
__u32 i_version; /* File version (for NFS) */ |
138 |
__u32 i_file_acl; /* File ACL */ |
139 |
- __u32 i_dir_acl; /* Directory ACL */ |
140 |
- __u32 i_faddr; /* Fragment address */ |
141 |
+ __u32 i_size_high; |
142 |
+ __u32 i_obso_faddr; /* Obsoleted fragment address */ |
143 |
union |
144 |
{ |
145 |
struct |
146 |
{ |
147 |
- __u8 l_i_frag; /* Fragment number */ |
148 |
- __u8 l_i_fsize; /* Fragment size */ |
149 |
- __u16 i_pad1; |
150 |
- __u32 l_i_reserved2[2]; |
151 |
+ __u16 l_i_blocks_high; /* were l_i_reserved1 */ |
152 |
+ __u16 l_i_file_acl_high; |
153 |
+ __u16 l_i_uid_high; /* these 2 fields */ |
154 |
+ __u16 l_i_gid_high; /* were reserved2[0] */ |
155 |
+ __u32 l_i_reserved2; |
156 |
} |
157 |
linux2; |
158 |
struct |
159 |
{ |
160 |
- __u8 h_i_frag; /* Fragment number */ |
161 |
- __u8 h_i_fsize; /* Fragment size */ |
162 |
+ __u16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
163 |
__u16 h_i_mode_high; |
164 |
__u16 h_i_uid_high; |
165 |
__u16 h_i_gid_high; |
166 |
@@ -198,16 +209,36 @@ struct ext2_inode |
167 |
hurd2; |
168 |
struct |
169 |
{ |
170 |
- __u8 m_i_frag; /* Fragment number */ |
171 |
- __u8 m_i_fsize; /* Fragment size */ |
172 |
- __u16 m_pad1; |
173 |
+ __u16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
174 |
+ __u16 m_i_file_acl_high; |
175 |
__u32 m_i_reserved2[2]; |
176 |
} |
177 |
masix2; |
178 |
} |
179 |
osd2; /* OS dependent 2 */ |
180 |
+ __u16 i_extra_isize; |
181 |
+ __u16 i_pad1; |
182 |
+ __u32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ |
183 |
+ __u32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ |
184 |
+ __u32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ |
185 |
+ __u32 i_crtime; /* File Creation time */ |
186 |
+ __u32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ |
187 |
+ __u32 i_version_hi; /* high 32 bits for 64-bit version */ |
188 |
}; |
189 |
|
190 |
+#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ |
191 |
+#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 /* grub not supported*/ |
192 |
+#define EXT4_FEATURE_INCOMPAT_MMP 0x0100 |
193 |
+#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 |
194 |
+ |
195 |
+#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \ |
196 |
+ ( sb->s_feature_incompat & mask ) |
197 |
+ |
198 |
+#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ |
199 |
+#define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ |
200 |
+ |
201 |
+#define EXT4_MIN_DESC_SIZE 32 |
202 |
+ |
203 |
/* linux/limits.h */ |
204 |
#define NAME_MAX 255 /* # chars in a file name */ |
205 |
|
206 |
@@ -225,6 +256,57 @@ struct ext2_dir_entry |
207 |
char name[EXT2_NAME_LEN]; /* File name */ |
208 |
}; |
209 |
|
210 |
+/* linux/ext4_fs_extents.h */ |
211 |
+/* This is the extent on-disk structure. |
212 |
+ * It's used at the bottom of the tree. |
213 |
+ */ |
214 |
+struct ext4_extent |
215 |
+ { |
216 |
+ __u32 ee_block; /* first logical block extent covers */ |
217 |
+ __u16 ee_len; /* number of blocks covered by extent */ |
218 |
+ __u16 ee_start_hi; /* high 16 bits of physical block */ |
219 |
+ __u32 ee_start_lo; /* low 32 bits of physical block */ |
220 |
+ }; |
221 |
+ |
222 |
+/* |
223 |
+ * This is index on-disk structure. |
224 |
+ * It's used at all the levels except the bottom. |
225 |
+ */ |
226 |
+struct ext4_extent_idx |
227 |
+ { |
228 |
+ __u32 ei_block; /* index covers logical blocks from 'block' */ |
229 |
+ __u32 ei_leaf_lo; /* pointer to the physical block of the next * |
230 |
+ * level. leaf or next index could be there */ |
231 |
+ __u16 ei_leaf_hi; /* high 16 bits of physical block */ |
232 |
+ __u16 ei_unused; |
233 |
+ }; |
234 |
+ |
235 |
+/* |
236 |
+ * Each block (leaves and indexes), even inode-stored has header. |
237 |
+ */ |
238 |
+struct ext4_extent_header |
239 |
+ { |
240 |
+ __u16 eh_magic; /* probably will support different formats */ |
241 |
+ __u16 eh_entries; /* number of valid entries */ |
242 |
+ __u16 eh_max; /* capacity of store in entries */ |
243 |
+ __u16 eh_depth; /* has tree real underlying blocks? */ |
244 |
+ __u32 eh_generation; /* generation of the tree */ |
245 |
+ }; |
246 |
+ |
247 |
+#define EXT4_EXT_MAGIC (0xf30a) |
248 |
+#define EXT_FIRST_EXTENT(__hdr__) \ |
249 |
+ ((struct ext4_extent *) (((char *) (__hdr__)) + \ |
250 |
+ sizeof(struct ext4_extent_header))) |
251 |
+#define EXT_FIRST_INDEX(__hdr__) \ |
252 |
+ ((struct ext4_extent_idx *) (((char *) (__hdr__)) + \ |
253 |
+ sizeof(struct ext4_extent_header))) |
254 |
+#define EXT_LAST_EXTENT(__hdr__) \ |
255 |
+ (EXT_FIRST_EXTENT((__hdr__)) + (__u16)((__hdr__)->eh_entries) - 1) |
256 |
+#define EXT_LAST_INDEX(__hdr__) \ |
257 |
+ (EXT_FIRST_INDEX((__hdr__)) + (__u16)((__hdr__)->eh_entries) - 1) |
258 |
+ |
259 |
+ |
260 |
+ |
261 |
/* linux/ext2fs.h */ |
262 |
/* |
263 |
* EXT2_DIR_PAD defines the directory entries boundaries |
264 |
@@ -276,8 +358,17 @@ struct ext2_dir_entry |
265 |
/* kind of from ext2/super.c */ |
266 |
#define EXT2_BLOCK_SIZE(s) (1 << EXT2_BLOCK_SIZE_BITS(s)) |
267 |
/* linux/ext2fs.h */ |
268 |
+/* sizeof(struct ext2_group_desc) is changed in ext4 |
269 |
+ * in kernel code, ext2/3 uses sizeof(struct ext2_group_desc) to calculate |
270 |
+ * number of desc per block, while ext4 uses superblock->s_desc_size in stead |
271 |
+ * superblock->s_desc_size is not available in ext2/3 |
272 |
+ * */ |
273 |
+#define EXT2_DESC_SIZE(s) \ |
274 |
+ (EXT4_HAS_INCOMPAT_FEATURE(s,EXT4_FEATURE_INCOMPAT_64BIT)? \ |
275 |
+ s->s_desc_size : EXT4_MIN_DESC_SIZE) |
276 |
#define EXT2_DESC_PER_BLOCK(s) \ |
277 |
- (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc)) |
278 |
+ (EXT2_BLOCK_SIZE(s) / EXT2_DESC_SIZE(s)) |
279 |
+ |
280 |
/* linux/stat.h */ |
281 |
#define S_IFMT 00170000 |
282 |
#define S_IFLNK 0120000 |
283 |
@@ -439,6 +530,122 @@ ext2fs_block_map (int logical_block) |
284 |
[logical_block & (EXT2_ADDR_PER_BLOCK (SUPERBLOCK) - 1)]; |
285 |
} |
286 |
|
287 |
+/* extent binary search index |
288 |
+ * find closest index in the current level extent tree |
289 |
+ * kind of from ext4_ext_binsearch_idx in ext4/extents.c |
290 |
+ */ |
291 |
+static struct ext4_extent_idx* |
292 |
+ext4_ext_binsearch_idx(struct ext4_extent_header* eh, int logical_block) |
293 |
+{ |
294 |
+ struct ext4_extent_idx *r, *l, *m; |
295 |
+ l = EXT_FIRST_INDEX(eh) + 1; |
296 |
+ r = EXT_LAST_INDEX(eh); |
297 |
+ while (l <= r) |
298 |
+ { |
299 |
+ m = l + (r - l) / 2; |
300 |
+ if (logical_block < m->ei_block) |
301 |
+ r = m - 1; |
302 |
+ else |
303 |
+ l = m + 1; |
304 |
+ } |
305 |
+ return (struct ext4_extent_idx*)(l - 1); |
306 |
+} |
307 |
+ |
308 |
+/* extent binary search |
309 |
+ * find closest extent in the leaf level |
310 |
+ * kind of from ext4_ext_binsearch in ext4/extents.c |
311 |
+ */ |
312 |
+static struct ext4_extent* |
313 |
+ext4_ext_binsearch(struct ext4_extent_header* eh, int logical_block) |
314 |
+{ |
315 |
+ struct ext4_extent *r, *l, *m; |
316 |
+ l = EXT_FIRST_EXTENT(eh) + 1; |
317 |
+ r = EXT_LAST_EXTENT(eh); |
318 |
+ while (l <= r) |
319 |
+ { |
320 |
+ m = l + (r - l) / 2; |
321 |
+ if (logical_block < m->ee_block) |
322 |
+ r = m - 1; |
323 |
+ else |
324 |
+ l = m + 1; |
325 |
+ } |
326 |
+ return (struct ext4_extent*)(l - 1); |
327 |
+} |
328 |
+ |
329 |
+/* Maps extents enabled logical block into physical block via an inode. |
330 |
+ * EXT4_HUGE_FILE_FL should be checked before calling this. |
331 |
+ */ |
332 |
+static int |
333 |
+ext4fs_block_map (int logical_block) |
334 |
+{ |
335 |
+ struct ext4_extent_header *eh; |
336 |
+ struct ext4_extent *ex, *extent; |
337 |
+ struct ext4_extent_idx *ei, *index; |
338 |
+ int depth; |
339 |
+ int i; |
340 |
+ |
341 |
+#ifdef E2DEBUG |
342 |
+ unsigned char *i; |
343 |
+ for (i = (unsigned char *) INODE; |
344 |
+ i < ((unsigned char *) INODE + sizeof (struct ext2_inode)); |
345 |
+ i++) |
346 |
+ { |
347 |
+ printf ("%c", "0123456789abcdef"[*i >> 4]); |
348 |
+ printf ("%c", "0123456789abcdef"[*i % 16]); |
349 |
+ if (!((i + 1 - (unsigned char *) INODE) % 16)) |
350 |
+ { |
351 |
+ printf ("\n"); |
352 |
+ } |
353 |
+ else |
354 |
+ { |
355 |
+ printf (" "); |
356 |
+ } |
357 |
+ } |
358 |
+ printf ("logical block %d\n", logical_block); |
359 |
+#endif /* E2DEBUG */ |
360 |
+ eh = (struct ext4_extent_header*)INODE->i_block; |
361 |
+ if (eh->eh_magic != EXT4_EXT_MAGIC) |
362 |
+ { |
363 |
+ errnum = ERR_FSYS_CORRUPT; |
364 |
+ return -1; |
365 |
+ } |
366 |
+ while((depth = eh->eh_depth) != 0) |
367 |
+ { /* extent index */ |
368 |
+ if (eh->eh_magic != EXT4_EXT_MAGIC) |
369 |
+ { |
370 |
+ errnum = ERR_FSYS_CORRUPT; |
371 |
+ return -1; |
372 |
+ } |
373 |
+ ei = ext4_ext_binsearch_idx(eh, logical_block); |
374 |
+ if (ei->ei_leaf_hi) |
375 |
+ {/* 64bit physical block number not supported */ |
376 |
+ errnum = ERR_FILELENGTH; |
377 |
+ return -1; |
378 |
+ } |
379 |
+ if (!ext2_rdfsb(ei->ei_leaf_lo, DATABLOCK1)) |
380 |
+ { |
381 |
+ errnum = ERR_FSYS_CORRUPT; |
382 |
+ return -1; |
383 |
+ } |
384 |
+ eh = (struct ext4_extent_header*)DATABLOCK1; |
385 |
+ } |
386 |
+ |
387 |
+ /* depth==0, we come to the leaf */ |
388 |
+ ex = ext4_ext_binsearch(eh, logical_block); |
389 |
+ if (ex->ee_start_hi) |
390 |
+ {/* 64bit physical block number not supported */ |
391 |
+ errnum = ERR_FILELENGTH; |
392 |
+ return -1; |
393 |
+ } |
394 |
+ if ((ex->ee_block + ex->ee_len) < logical_block) |
395 |
+ { |
396 |
+ errnum = ERR_FSYS_CORRUPT; |
397 |
+ return -1; |
398 |
+ } |
399 |
+ return ex->ee_start_lo + logical_block - ex->ee_block; |
400 |
+ |
401 |
+} |
402 |
+ |
403 |
/* preconditions: all preconds of ext2fs_block_map */ |
404 |
int |
405 |
ext2fs_read (char *buf, int len) |
406 |
@@ -473,6 +680,11 @@ ext2fs_read (char *buf, int len) |
407 |
/* find the (logical) block component of our location */ |
408 |
logical_block = filepos >> EXT2_BLOCK_SIZE_BITS (SUPERBLOCK); |
409 |
offset = filepos & (EXT2_BLOCK_SIZE (SUPERBLOCK) - 1); |
410 |
+ /* map extents enabled logical block number to physical fs on-dick block number */ |
411 |
+ if (EXT4_HAS_INCOMPAT_FEATURE(SUPERBLOCK,EXT4_FEATURE_INCOMPAT_EXTENTS) |
412 |
+ && INODE->i_flags & EXT4_EXTENTS_FL) |
413 |
+ map = ext4fs_block_map (logical_block); |
414 |
+ else |
415 |
map = ext2fs_block_map (logical_block); |
416 |
#ifdef E2DEBUG |
417 |
printf ("map=%d\n", map); |
418 |
@@ -557,7 +769,7 @@ ext2fs_dir (char *dirname) |
419 |
int desc; /* index within that group */ |
420 |
int ino_blk; /* fs pointer of the inode's information */ |
421 |
int str_chk = 0; /* used to hold the results of a string compare */ |
422 |
- struct ext2_group_desc *gdp; |
423 |
+ struct ext4_group_desc *ext4_gdp; |
424 |
struct ext2_inode *raw_inode; /* inode info corresponding to current_ino */ |
425 |
|
426 |
char linkbuf[PATH_MAX]; /* buffer for following symbolic links */ |
427 |
@@ -603,8 +815,15 @@ ext2fs_dir (char *dirname) |
428 |
{ |
429 |
return 0; |
430 |
} |
431 |
- gdp = GROUP_DESC; |
432 |
- ino_blk = gdp[desc].bg_inode_table + |
433 |
+ ext4_gdp = (struct ext4_group_desc *)( (__u8*)GROUP_DESC + |
434 |
+ desc * EXT2_DESC_SIZE(SUPERBLOCK)); |
435 |
+ if (EXT4_HAS_INCOMPAT_FEATURE(SUPERBLOCK, EXT4_FEATURE_INCOMPAT_64BIT) |
436 |
+ && (! ext4_gdp->bg_inode_table_hi)) |
437 |
+ {/* 64bit itable not supported */ |
438 |
+ errnum = ERR_FILELENGTH; |
439 |
+ return -1; |
440 |
+ } |
441 |
+ ino_blk = ext4_gdp->bg_inode_table + |
442 |
(((current_ino - 1) % (SUPERBLOCK->s_inodes_per_group)) |
443 |
>> log2 (EXT2_INODES_PER_BLOCK (SUPERBLOCK))); |
444 |
#ifdef E2DEBUG |
445 |
@@ -681,7 +900,10 @@ ext2fs_dir (char *dirname) |
446 |
} |
447 |
linkbuf[filemax + len] = '\0'; |
448 |
|
449 |
- /* Read the symlink data. */ |
450 |
+ /* Read the symlink data. |
451 |
+ * Slow symlink is extents enabled |
452 |
+ * But since grub_read invokes ext2fs_read, nothing to change here |
453 |
+ * */ |
454 |
if (! ext2_is_fast_symlink ()) |
455 |
{ |
456 |
/* Read the necessary blocks, and reset the file pointer. */ |
457 |
@@ -692,7 +914,9 @@ ext2fs_dir (char *dirname) |
458 |
} |
459 |
else |
460 |
{ |
461 |
- /* Copy the data directly from the inode. */ |
462 |
+ /* Copy the data directly from the inode. |
463 |
+ * Fast symlink is not extents enabled |
464 |
+ * */ |
465 |
len = filemax; |
466 |
memmove (linkbuf, (char *) INODE->i_block, len); |
467 |
} |
468 |
@@ -726,6 +950,13 @@ ext2fs_dir (char *dirname) |
469 |
errnum = ERR_BAD_FILETYPE; |
470 |
return 0; |
471 |
} |
472 |
+ /* if file is too large, just stop and report an error*/ |
473 |
+ if ( (INODE->i_flags & EXT4_HUGE_FILE_FL) && !(INODE->i_size_high)) |
474 |
+ { |
475 |
+ /* file too large, stop reading */ |
476 |
+ errnum = ERR_FILELENGTH; |
477 |
+ return 0; |
478 |
+ } |
479 |
|
480 |
filemax = (INODE->i_size); |
481 |
return 1; |
482 |
@@ -780,17 +1011,28 @@ ext2fs_dir (char *dirname) |
483 |
} |
484 |
|
485 |
/* else, find the (logical) block component of our location */ |
486 |
+ /* ext4 logical block number the same as ext2/3 */ |
487 |
blk = loc >> EXT2_BLOCK_SIZE_BITS (SUPERBLOCK); |
488 |
|
489 |
/* we know which logical block of the directory entry we are looking |
490 |
for, now we have to translate that to the physical (fs) block on |
491 |
the disk */ |
492 |
+ /* map extents enabled logical block number to physical fs on-dick block number */ |
493 |
+ if (EXT4_HAS_INCOMPAT_FEATURE(SUPERBLOCK,EXT4_FEATURE_INCOMPAT_EXTENTS) |
494 |
+ && INODE->i_flags & EXT4_EXTENTS_FL) |
495 |
+ map = ext4fs_block_map (blk); |
496 |
+ else |
497 |
map = ext2fs_block_map (blk); |
498 |
#ifdef E2DEBUG |
499 |
printf ("fs block=%d\n", map); |
500 |
#endif /* E2DEBUG */ |
501 |
mapblock2 = -1; |
502 |
- if ((map < 0) || !ext2_rdfsb (map, DATABLOCK2)) |
503 |
+ if (map < 0) |
504 |
+ { |
505 |
+ *rest = ch; |
506 |
+ return 0; |
507 |
+ } |
508 |
+ if (!ext2_rdfsb (map, DATABLOCK2)) |
509 |
{ |
510 |
errnum = ERR_FSYS_CORRUPT; |
511 |
*rest = ch; |