rtl88x2CE_WiFi_linux add concurrent mode

hc

2024-09-20 cf4ce59b3b70238352c7f1729f0f7223214828ad

 kernel/fs/exfat/dir.c
..
..
@@ -33,6 +33,7 @@
33
33
 {
34
34
 	int i;
35
35
 	struct exfat_entry_set_cache *es;
36
+	unsigned int uni_len = 0, len;
36
37
 
37
38
 	es = exfat_get_dentry_set(sb, p_dir, entry, ES_ALL_ENTRIES);
38
39
 	if (!es)
..
..
@@ -51,7 +52,10 @@
51
52
 		if (exfat_get_entry_type(ep) != TYPE_EXTEND)
52
53
 			break;
53
54
 
54
-		exfat_extract_uni_name(ep, uniname);
55
+		len = exfat_extract_uni_name(ep, uniname);
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+		uni_len += len;
57
+		if (len != EXFAT_FILE_NAME_LEN || uni_len >= MAX_NAME_LENGTH)
58
+			break;
55
59
 		uniname += EXFAT_FILE_NAME_LEN;
56
60
 	}
57
61
 
..
..
@@ -102,7 +106,7 @@
102
106
 			clu.dir = ei->hint_bmap.clu;
103
107
 		}
104
108
 
105
-		while (clu_offset > 0) {
109
+		while (clu_offset > 0 && clu.dir != EXFAT_EOF_CLUSTER) {
106
110
 			if (exfat_get_next_cluster(sb, &(clu.dir)))
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111
 				return -EIO;
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112
 
..
..
@@ -148,7 +152,7 @@
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152
 					0);
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153
 
150
154
 			*uni_name.name = 0x0;
151
-			exfat_get_uniname_from_ext_entry(sb, &dir, dentry,
155
+			exfat_get_uniname_from_ext_entry(sb, &clu, i,
152
156
 				uni_name.name);
153
157
 			exfat_utf16_to_nls(sb, &uni_name,
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158
 				dir_entry->namebuf.lfn,
..
..
@@ -210,7 +214,10 @@
210
214
 	exfat_init_namebuf(nb);
211
215
 }
212
216
 
213
-/* skip iterating emit_dots when dir is empty */
217
+/*
218
+ * Before calling dir_emit*(), sbi->s_lock should be released
219
+ * because page fault can occur in dir_emit*().
220
+ */
214
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 #define ITER_POS_FILLED_DOTS    (2)
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 static int exfat_iterate(struct file *filp, struct dir_context *ctx)
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 {
..
..
@@ -225,35 +232,33 @@
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 	int err = 0, fake_offset = 0;
226
233
 
227
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 	exfat_init_namebuf(nb);
228
-	mutex_lock(&EXFAT_SB(sb)->s_lock);
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235
 
230
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 	cpos = ctx->pos;
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 	if (!dir_emit_dots(filp, ctx))
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-		goto unlock;
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+		goto out;
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239
 
234
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 	if (ctx->pos == ITER_POS_FILLED_DOTS) {
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241
 		cpos = 0;
236
242
 		fake_offset = 1;
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243
 	}
238
244
 
239
-	if (cpos & (DENTRY_SIZE - 1)) {
240
-		err = -ENOENT;
241
-		goto unlock;
242
-	}
245
+	cpos = round_up(cpos, DENTRY_SIZE);
243
246
 
244
247
 	/* name buffer should be allocated before use */
245
248
 	err = exfat_alloc_namebuf(nb);
246
249
 	if (err)
247
-		goto unlock;
250
+		goto out;
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251
 get_new:
252
+	mutex_lock(&EXFAT_SB(sb)->s_lock);
253
+
249
254
 	if (ei->flags == ALLOC_NO_FAT_CHAIN && cpos >= i_size_read(inode))
250
255
 		goto end_of_dir;
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256
 
252
257
 	err = exfat_readdir(inode, &cpos, &de);
253
258
 	if (err) {
254
259
 		/*
255
-		 * At least we tried to read a sector.  Move cpos to next sector
256
-		 * position (should be aligned).
260
+		 * At least we tried to read a sector.
261
+		 * Move cpos to next sector position (should be aligned).
257
262
 		 */
258
263
 		if (err == -EIO) {
259
264
 			cpos += 1 << (sb->s_blocksize_bits);
..
..
@@ -276,16 +281,10 @@
276
281
 		inum = iunique(sb, EXFAT_ROOT_INO);
277
282
 	}
278
283
 
279
-	/*
280
-	 * Before calling dir_emit(), sb_lock should be released.
281
-	 * Because page fault can occur in dir_emit() when the size
282
-	 * of buffer given from user is larger than one page size.
283
-	 */
284
284
 	mutex_unlock(&EXFAT_SB(sb)->s_lock);
285
285
 	if (!dir_emit(ctx, nb->lfn, strlen(nb->lfn), inum,
286
286
 			(de.attr & ATTR_SUBDIR) ? DT_DIR : DT_REG))
287
-		goto out_unlocked;
288
-	mutex_lock(&EXFAT_SB(sb)->s_lock);
287
+		goto out;
289
288
 	ctx->pos = cpos;
290
289
 	goto get_new;
291
290
 
..
..
@@ -293,9 +292,8 @@
293
292
 	if (!cpos && fake_offset)
294
293
 		cpos = ITER_POS_FILLED_DOTS;
295
294
 	ctx->pos = cpos;
296
-unlock:
297
295
 	mutex_unlock(&EXFAT_SB(sb)->s_lock);
298
-out_unlocked:
296
+out:
299
297
 	/*
300
298
 	 * To improve performance, free namebuf after unlock sb_lock.
301
299
 	 * If namebuf is not allocated, this function do nothing
..
..
@@ -615,6 +613,10 @@
615
613
 			bforget(es->bh[i]);
616
614
 		else
617
615
 			brelse(es->bh[i]);
616
+
617
+	if (IS_DYNAMIC_ES(es))
618
+		kfree(es->bh);
619
+
618
620
 	kfree(es);
619
621
 	return err;
620
622
 }
..
..
@@ -850,6 +852,7 @@
850
852
 	/* byte offset in sector */
851
853
 	off = EXFAT_BLK_OFFSET(byte_offset, sb);
852
854
 	es->start_off = off;
855
+	es->bh = es->__bh;
853
856
 
854
857
 	/* sector offset in cluster */
855
858
 	sec = EXFAT_B_TO_BLK(byte_offset, sb);
..
..
@@ -869,6 +872,16 @@
869
872
 	es->num_entries = num_entries;
870
873
 
871
874
 	num_bh = EXFAT_B_TO_BLK_ROUND_UP(off + num_entries * DENTRY_SIZE, sb);
875
+	if (num_bh > ARRAY_SIZE(es->__bh)) {
876
+		es->bh = kmalloc_array(num_bh, sizeof(*es->bh), GFP_KERNEL);
877
+		if (!es->bh) {
878
+			brelse(bh);
879
+			kfree(es);
880
+			return NULL;
881
+		}
882
+		es->bh[0] = bh;
883
+	}
884
+
872
885
 	for (i = 1; i < num_bh; i++) {
873
886
 		/* get the next sector */
874
887
 		if (exfat_is_last_sector_in_cluster(sbi, sec)) {
..
..
@@ -908,14 +921,19 @@
908
921
 };
909
922
 
910
923
 /*
911
- * return values:
912
- *   >= 0	: return dir entiry position with the name in dir
913
- *   -ENOENT	: entry with the name does not exist
914
- *   -EIO	: I/O error
924
+ * @ei:         inode info of parent directory
925
+ * @p_dir:      directory structure of parent directory
926
+ * @num_entries:entry size of p_uniname
927
+ * @hint_opt:   If p_uniname is found, filled with optimized dir/entry
928
+ *              for traversing cluster chain.
929
+ * @return:
930
+ *   >= 0:      file directory entry position where the name exists
931
+ *   -ENOENT:   entry with the name does not exist
932
+ *   -EIO:      I/O error
915
933
  */
916
934
 int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei,
917
935
 		struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
918
-		int num_entries, unsigned int type)
936
+		int num_entries, unsigned int type, struct exfat_hint *hint_opt)
919
937
 {
920
938
 	int i, rewind = 0, dentry = 0, end_eidx = 0, num_ext = 0, len;
921
939
 	int order, step, name_len = 0;
..
..
@@ -992,6 +1010,8 @@
992
1010
 
993
1011
 			if (entry_type == TYPE_FILE || entry_type == TYPE_DIR) {
994
1012
 				step = DIRENT_STEP_FILE;
1013
+				hint_opt->clu = clu.dir;
1014
+				hint_opt->eidx = i;
995
1015
 				if (type == TYPE_ALL || type == entry_type) {
996
1016
 					num_ext = ep->dentry.file.num_ext;
997
1017
 					step = DIRENT_STEP_STRM;
..
..
@@ -1026,7 +1046,8 @@
1026
1046
 			if (entry_type == TYPE_EXTEND) {
1027
1047
 				unsigned short entry_uniname[16], unichar;
1028
1048
 
1029
-				if (step != DIRENT_STEP_NAME) {
1049
+				if (step != DIRENT_STEP_NAME ||
1050
+				    name_len >= MAX_NAME_LENGTH) {
1030
1051
 					step = DIRENT_STEP_FILE;
1031
1052
 					continue;
1032
1053
 				}