[PATCH mtd-utils v2 RESEND 078/102] fsck.ubifs: Check and correct files' information
Zhihao Cheng
chengzhihao1 at huawei.com
Mon Nov 11 01:08:06 PST 2024
From: Xiang Yang <xiangyang3 at huawei.com>
This is the 10/18 step of fsck. Check and handle inconsistent files, the
checking rule is same as rebuild mode which has been implemented in
check_and_correct_files, but the methods of handling are different:
1. Correct the file information for safe mode, danger mode and normal
mode with 'yes' answer, other modes will exit.
Signed-off-by: Xiang Yang <xiangyang3 at huawei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1 at huawei.com>
---
ubifs-utils/fsck.ubifs/extract_files.c | 76 ++++++++++++++++++++++------------
ubifs-utils/fsck.ubifs/fsck.ubifs.c | 8 ++++
ubifs-utils/fsck.ubifs/fsck.ubifs.h | 2 +-
ubifs-utils/fsck.ubifs/problem.c | 16 +++++++
4 files changed, 74 insertions(+), 28 deletions(-)
diff --git a/ubifs-utils/fsck.ubifs/extract_files.c b/ubifs-utils/fsck.ubifs/extract_files.c
index b24445be..c83d3774 100644
--- a/ubifs-utils/fsck.ubifs/extract_files.c
+++ b/ubifs-utils/fsck.ubifs/extract_files.c
@@ -1292,8 +1292,8 @@ reachable:
* data nodes and truncation node. The calculated informaion will be used
* to correct inode node.
*/
-static void calculate_file_info(struct ubifs_info *c, struct scanned_file *file,
- struct rb_root *file_tree)
+static int calculate_file_info(struct ubifs_info *c, struct scanned_file *file,
+ struct rb_root *file_tree)
{
int nlink = 0;
bool corrupted_truncation = false;
@@ -1306,15 +1306,24 @@ static void calculate_file_info(struct ubifs_info *c, struct scanned_file *file,
for (node = rb_first(&file->xattr_files); node; node = rb_next(node)) {
xattr_file = rb_entry(node, struct scanned_file, rb);
+ dent_node = rb_entry(rb_first(&xattr_file->dent_nodes),
+ struct scanned_dent_node, rb);
+ ubifs_assert(c, xattr_file->ino.is_xattr);
ubifs_assert(c, !rb_first(&xattr_file->xattr_files));
- calculate_file_info(c, xattr_file, file_tree);
+ xattr_file->calc_nlink = 1;
+ xattr_file->calc_size = xattr_file->ino.size;
+
+ file->calc_xcnt += 1;
+ file->calc_xsz += CALC_DENT_SIZE(dent_node->nlen);
+ file->calc_xsz += CALC_XATTR_BYTES(xattr_file->ino.size);
+ file->calc_xnms += dent_node->nlen;
}
if (file->inum == UBIFS_ROOT_INO) {
file->calc_nlink += 2;
file->calc_size += UBIFS_INO_NODE_SZ;
- return;
+ return 0;
}
if (S_ISDIR(file->ino.mode)) {
@@ -1326,29 +1335,11 @@ static void calculate_file_info(struct ubifs_info *c, struct scanned_file *file,
parent_file = lookup_file(file_tree, key_inum(c, &dent_node->key));
if (!parent_file) {
ubifs_assert(c, 0);
- return;
+ return 0;
}
parent_file->calc_nlink += 1;
parent_file->calc_size += CALC_DENT_SIZE(dent_node->nlen);
- return;
- }
-
- if (file->ino.is_xattr) {
- file->calc_nlink = 1;
- file->calc_size = file->ino.size;
-
- dent_node = rb_entry(rb_first(&file->dent_nodes),
- struct scanned_dent_node, rb);
- parent_file = lookup_file(file_tree, key_inum(c, &dent_node->key));
- if (!parent_file) {
- ubifs_assert(c, 0);
- return;
- }
- parent_file->calc_xcnt += 1;
- parent_file->calc_xsz += CALC_DENT_SIZE(dent_node->nlen);
- parent_file->calc_xsz += CALC_XATTR_BYTES(file->ino.size);
- parent_file->calc_xnms += dent_node->nlen;
- return;
+ return 0;
}
for (node = rb_first(&file->dent_nodes); node; node = rb_next(node)) {
@@ -1359,7 +1350,7 @@ static void calculate_file_info(struct ubifs_info *c, struct scanned_file *file,
parent_file = lookup_file(file_tree, key_inum(c, &dent_node->key));
if (!parent_file) {
ubifs_assert(c, 0);
- return;
+ return 0;
}
parent_file->calc_size += CALC_DENT_SIZE(dent_node->nlen);
}
@@ -1368,7 +1359,7 @@ static void calculate_file_info(struct ubifs_info *c, struct scanned_file *file,
if (!S_ISREG(file->ino.mode)) {
/* No need to verify i_size for symlink/sock/block/char/fifo. */
file->calc_size = file->ino.size;
- return;
+ return 0;
}
/*
@@ -1452,10 +1443,22 @@ drop_data:
data_node = list_entry(drop_list.next, struct scanned_data_node,
list);
+ if (FSCK(c)->mode != REBUILD_MODE) {
+ /*
+ * Don't ask, inconsistent file correcting will be
+ * asked in function correct_file_info().
+ */
+ int err = delete_node(c, &data_node->key,
+ data_node->header.lnum, data_node->header.offs);
+ if (err)
+ return err;
+ }
list_del(&data_node->list);
rb_erase(&data_node->rb, &file->data_nodes);
kfree(data_node);
}
+
+ return 0;
}
/**
@@ -1490,6 +1493,7 @@ static int correct_file_info(struct ubifs_info *c, struct scanned_file *file)
file->calc_size == file->ino.size)
return 0;
+ handle_invalid_file(c, FILE_IS_INCONSISTENT, file, NULL);
lnum = file->ino.header.lnum;
dbg_fsck("correct file(inum:%lu type:%s), nlink %u->%u, xattr cnt %u->%u, xattr size %u->%u, xattr names %u->%u, size %llu->%llu, at %d:%d, in %s",
file->inum, file->ino.is_xattr ? "xattr" :
@@ -1537,7 +1541,9 @@ int check_and_correct_files(struct ubifs_info *c)
for (node = rb_first(tree); node; node = rb_next(node)) {
file = rb_entry(node, struct scanned_file, rb);
- calculate_file_info(c, file, tree);
+ err = calculate_file_info(c, file, tree);
+ if (err)
+ return err;
}
for (node = rb_first(tree); node; node = rb_next(node)) {
@@ -1548,5 +1554,21 @@ int check_and_correct_files(struct ubifs_info *c)
return err;
}
+ if (list_empty(&FSCK(c)->disconnected_files))
+ return 0;
+
+ ubifs_assert(c, FSCK(c)->mode != REBUILD_MODE);
+ list_for_each_entry(file, &FSCK(c)->disconnected_files, list) {
+ err = calculate_file_info(c, file, tree);
+ if (err)
+ return err;
+
+ /* Reset disconnected file's nlink as one. */
+ file->calc_nlink = 1;
+ err = correct_file_info(c, file);
+ if (err)
+ return err;
+ }
+
return 0;
}
diff --git a/ubifs-utils/fsck.ubifs/fsck.ubifs.c b/ubifs-utils/fsck.ubifs/fsck.ubifs.c
index 6a718fd8..3f61668e 100644
--- a/ubifs-utils/fsck.ubifs/fsck.ubifs.c
+++ b/ubifs-utils/fsck.ubifs/fsck.ubifs.c
@@ -460,6 +460,13 @@ static int do_fsck(void)
goto free_disconnected_files;
}
+ log_out(c, "Check and correct files");
+ err = check_and_correct_files(c);
+ if (err) {
+ exit_code |= FSCK_ERROR;
+ goto free_disconnected_files;
+ }
+
free_disconnected_files:
destroy_file_list(c, &FSCK(c)->disconnected_files);
free_used_lebs:
@@ -504,6 +511,7 @@ int main(int argc, char *argv[])
* Step 7: Update files' size
* Step 8: Check and handle invalid files
* Step 9: Check and handle unreachable files
+ * Step 10: Check and correct files
*/
err = do_fsck();
if (err && FSCK(c)->try_rebuild) {
diff --git a/ubifs-utils/fsck.ubifs/fsck.ubifs.h b/ubifs-utils/fsck.ubifs/fsck.ubifs.h
index 521723d7..32a991dd 100644
--- a/ubifs-utils/fsck.ubifs/fsck.ubifs.h
+++ b/ubifs-utils/fsck.ubifs/fsck.ubifs.h
@@ -43,7 +43,7 @@ enum { SB_CORRUPTED = 0, MST_CORRUPTED, LOG_CORRUPTED, BUD_CORRUPTED,
FILE_HAS_0_NLINK_INODE, FILE_HAS_INCONSIST_TYPE, FILE_HAS_TOO_MANY_DENT,
FILE_SHOULDNT_HAVE_DATA, FILE_HAS_NO_DENT, XATTR_HAS_NO_HOST,
XATTR_HAS_WRONG_HOST, FILE_HAS_NO_ENCRYPT, FILE_IS_DISCONNECTED,
- FILE_ROOT_HAS_DENT, DENTRY_IS_UNREACHABLE };
+ FILE_ROOT_HAS_DENT, DENTRY_IS_UNREACHABLE, FILE_IS_INCONSISTENT };
enum { HAS_DATA_CORRUPTED = 1, HAS_TNC_CORRUPTED = 2 };
diff --git a/ubifs-utils/fsck.ubifs/problem.c b/ubifs-utils/fsck.ubifs/problem.c
index 0395a34f..e8f08606 100644
--- a/ubifs-utils/fsck.ubifs/problem.c
+++ b/ubifs-utils/fsck.ubifs/problem.c
@@ -59,6 +59,7 @@ static const struct fsck_problem problem_table[] = {
{PROBLEM_FIXABLE | PROBLEM_MUST_FIX, "File is disconnected(regular file without dentries)"}, // FILE_IS_DISCONNECTED
{PROBLEM_FIXABLE | PROBLEM_MUST_FIX | PROBLEM_DROP_DATA, "Root dir should not have a dentry"}, // FILE_ROOT_HAS_DENT
{PROBLEM_FIXABLE | PROBLEM_MUST_FIX | PROBLEM_DROP_DATA, "Dentry is unreachable"}, // DENTRY_IS_UNREACHABLE
+ {PROBLEM_FIXABLE | PROBLEM_MUST_FIX, "File is inconsistent"}, // FILE_IS_INCONSISTENT
};
static const char *get_question(const struct fsck_problem *problem,
@@ -212,6 +213,21 @@ static void print_problem(const struct ubifs_info *c,
key_type(c, &dent_node->key) == UBIFS_XENT_KEY ? "(xattr)" : "");
break;
}
+ case FILE_IS_INCONSISTENT:
+ {
+ const struct invalid_file_problem *ifp = (const struct invalid_file_problem *)priv;
+ const struct scanned_file *file = ifp->file;
+
+ log_out(c, "problem: %s, ino %lu type %s, nlink %u xcnt %u xsz %u xnms %u size %llu, "
+ "should be nlink %u xcnt %u xsz %u xnms %u size %llu",
+ problem->desc, file->inum,
+ file->ino.is_xattr ? "xattr" : ubifs_get_type_name(ubifs_get_dent_type(file->ino.mode)),
+ file->ino.nlink, file->ino.xcnt, file->ino.xsz,
+ file->ino.xnms, file->ino.size,
+ file->calc_nlink, file->calc_xcnt, file->calc_xsz,
+ file->calc_xnms, file->calc_size);
+ break;
+ }
default:
log_out(c, "problem: %s", problem->desc);
break;
--
2.13.6
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