[RFC PATCH mtd-utils 080/110] fsck.ubifs: Recover isize
Zhihao Cheng
chengzhihao1 at huawei.com
Thu Jun 6 21:25:45 PDT 2024
This is the 5/18 step of fsck. Recover isize. There could be following
steps and possible errors:
Step 1. Traverse size tree, lookup corresponding inode from TNC
a. corrupted node searched from TNC: skip node for danger mode and
normal mode with 'yes' answer, other modes will exit.
b. corrupted index node read from TNC: danger mode with rebuild_fs and
normal mode with 'yes' answer will turn to rebuild filesystem, other
modes will exit.
Step 2. update isize for inode. Keep <inum, isize> in size tree for check
mode, update inode node in place for other modes.
Signed-off-by: Zhihao Cheng <chengzhihao1 at huawei.com>
---
ubifs-utils/fsck.ubifs/fsck.ubifs.c | 1 +
ubifs-utils/fsck.ubifs/load_fs.c | 79 +++++++++++++++++++++----------------
ubifs-utils/libubifs/recovery.c | 34 +++++++++++++---
3 files changed, 75 insertions(+), 39 deletions(-)
diff --git a/ubifs-utils/fsck.ubifs/fsck.ubifs.c b/ubifs-utils/fsck.ubifs/fsck.ubifs.c
index 9d69a4fd..77013851 100644
--- a/ubifs-utils/fsck.ubifs/fsck.ubifs.c
+++ b/ubifs-utils/fsck.ubifs/fsck.ubifs.c
@@ -434,6 +434,7 @@ int main(int argc, char *argv[])
* Step 2: Replay journal
* Step 3: Handle orphan nodes
* Step 4: Consolidate log
+ * Step 5: Recover isize
*/
err = ubifs_load_filesystem(c);
if (err) {
diff --git a/ubifs-utils/fsck.ubifs/load_fs.c b/ubifs-utils/fsck.ubifs/load_fs.c
index 42b1afaa..58540543 100644
--- a/ubifs-utils/fsck.ubifs/load_fs.c
+++ b/ubifs-utils/fsck.ubifs/load_fs.c
@@ -17,6 +17,33 @@
#include "misc.h"
#include "fsck.ubifs.h"
+enum { HAS_DATA_CORRUPTED = 1, HAS_TNC_CORRUPTED = 2 };
+
+static void handle_error(const struct ubifs_info *c, int reason_set)
+{
+ bool handled = false;
+ unsigned int reason = get_failure_reason_callback(c);
+
+ clear_failure_reason_callback(c);
+ if ((reason_set & HAS_DATA_CORRUPTED) && (reason & FR_DATA_CORRUPTED)) {
+ handled = true;
+ reason &= ~FR_DATA_CORRUPTED;
+ if (fix_problem(c, LOG_CORRUPTED, NULL))
+ FSCK(c)->try_rebuild = true;
+ }
+ if ((reason_set & HAS_TNC_CORRUPTED) && (reason & FR_TNC_CORRUPTED)) {
+ ubifs_assert(c, !handled);
+ handled = true;
+ reason &= ~FR_TNC_CORRUPTED;
+ if (fix_problem(c, TNC_CORRUPTED, NULL))
+ FSCK(c)->try_rebuild = true;
+ }
+
+ ubifs_assert(c, reason == 0);
+ if (!handled)
+ exit_code |= FSCK_ERROR;
+}
+
int ubifs_load_filesystem(struct ubifs_info *c)
{
int err;
@@ -164,19 +191,7 @@ int ubifs_load_filesystem(struct ubifs_info *c)
log_out(c, "Replay journal");
err = ubifs_replay_journal(c);
if (err) {
- unsigned int reason = get_failure_reason_callback(c);
-
- clear_failure_reason_callback(c);
- if (reason & FR_DATA_CORRUPTED) {
- if (fix_problem(c, LOG_CORRUPTED, NULL))
- FSCK(c)->try_rebuild = true;
- } else if (reason & FR_TNC_CORRUPTED) {
- if (fix_problem(c, TNC_CORRUPTED, NULL))
- FSCK(c)->try_rebuild = true;
- } else {
- ubifs_assert(c, reason == 0);
- exit_code |= FSCK_ERROR;
- }
+ handle_error(c, HAS_DATA_CORRUPTED | HAS_TNC_CORRUPTED);
goto out_journal;
}
@@ -186,16 +201,7 @@ int ubifs_load_filesystem(struct ubifs_info *c)
log_out(c, "Handle orphan nodes");
err = ubifs_mount_orphans(c, c->need_recovery, c->ro_mount);
if (err) {
- unsigned int reason = get_failure_reason_callback(c);
-
- clear_failure_reason_callback(c);
- if (reason & FR_TNC_CORRUPTED) {
- if (fix_problem(c, TNC_CORRUPTED, NULL))
- FSCK(c)->try_rebuild = true;
- } else {
- ubifs_assert(c, reason == 0);
- exit_code |= FSCK_ERROR;
- }
+ handle_error(c, HAS_TNC_CORRUPTED);
goto out_orphans;
}
@@ -210,19 +216,26 @@ int ubifs_load_filesystem(struct ubifs_info *c)
log_out(c, "Consolidate log");
err = ubifs_consolidate_log(c);
if (err) {
- unsigned int reason = get_failure_reason_callback(c);
-
- clear_failure_reason_callback(c);
- if (reason & FR_DATA_CORRUPTED) {
- if (fix_problem(c, LOG_CORRUPTED, NULL))
- FSCK(c)->try_rebuild = true;
- } else {
- ubifs_assert(c, reason == 0);
- exit_code |= FSCK_ERROR;
- }
+ handle_error(c, HAS_DATA_CORRUPTED);
+ goto out_orphans;
+ }
+ }
+
+ if (c->need_recovery) {
+ log_out(c, "Recover isize");
+ err = ubifs_recover_size(c, true);
+ if (err) {
+ handle_error(c, HAS_TNC_CORRUPTED);
goto out_orphans;
}
}
+ } else if (c->need_recovery) {
+ log_out(c, "Recover isize");
+ err = ubifs_recover_size(c, false);
+ if (err) {
+ handle_error(c, HAS_TNC_CORRUPTED);
+ goto out_orphans;
+ }
}
c->mounting = 0;
diff --git a/ubifs-utils/libubifs/recovery.c b/ubifs-utils/libubifs/recovery.c
index 9115b17a..a5133a0f 100644
--- a/ubifs-utils/libubifs/recovery.c
+++ b/ubifs-utils/libubifs/recovery.c
@@ -1272,8 +1272,18 @@ static int fix_size_in_place(struct ubifs_info *c, struct size_entry *e)
/* Locate the inode node LEB number and offset */
ino_key_init(c, &key, e->inum);
err = ubifs_tnc_locate(c, &key, ino, &lnum, &offs);
- if (err)
+ if (err) {
+ unsigned int reason = get_failure_reason_callback(c);
+
+ if (reason & FR_DATA_CORRUPTED) {
+ test_and_clear_failure_reason_callback(c, FR_DATA_CORRUPTED);
+ if (handle_failure_callback(c, FR_H_TNC_DATA_CORRUPTED, NULL)) {
+ /* Leave the inode to be deleted by subsequent steps */
+ return 0;
+ }
+ }
goto out;
+ }
/*
* If the size recorded on the inode node is greater than the size that
* was calculated from nodes in the journal then don't change the inode.
@@ -1320,10 +1330,10 @@ out:
*/
static int inode_fix_size(struct ubifs_info *c, __unused struct size_entry *e)
{
- ubifs_assert(c, 0);
-
- // To be implemented
- return -EINVAL;
+ /* Don't remove entry, keep it in the size tree. */
+ /* Remove this assertion after supporting authentication. */
+ ubifs_assert(c, c->ro_mount);
+ return 0;
}
/**
@@ -1353,8 +1363,19 @@ int ubifs_recover_size(struct ubifs_info *c, bool in_place)
ino_key_init(c, &key, e->inum);
err = ubifs_tnc_lookup(c, &key, c->sbuf);
- if (err && err != -ENOENT)
+ if (err && err != -ENOENT) {
+ unsigned int reason;
+
+ reason = get_failure_reason_callback(c);
+ if (reason & FR_DATA_CORRUPTED) {
+ test_and_clear_failure_reason_callback(c, FR_DATA_CORRUPTED);
+ if (handle_failure_callback(c, FR_H_TNC_DATA_CORRUPTED, NULL)) {
+ /* Leave the inode to be deleted by subsequent steps */
+ goto delete_entry;
+ }
+ }
return err;
+ }
if (err == -ENOENT) {
/* Remove data nodes that have no inode */
dbg_rcvry("removing ino %lu",
@@ -1390,6 +1411,7 @@ int ubifs_recover_size(struct ubifs_info *c, bool in_place)
}
}
+delete_entry:
rb_erase(&e->rb, &c->size_tree);
kfree(e);
}
--
2.13.6
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