akpm at linux-foundation.org
2015-Aug-21 21:41 UTC
[Ocfs2-devel] [patch 23/24] ocfs2: check/fix inode block for online file check
From: Gang He <ghe at suse.com>
Subject: ocfs2: check/fix inode block for online file check
Implement online check or fix inode block during reading a inode block to
memory.
Signed-off-by: Gang He <ghe at suse.com>
Reviewed-by: Goldwyn Rodrigues <rgoldwyn at suse.de>
Cc: Mark Fasheh <mfasheh at suse.com>
Cc: Joel Becker <jlbec at evilplan.org>
Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
---
fs/ocfs2/inode.c | 196 +++++++++++++++++++++++++++++++++++++--
fs/ocfs2/ocfs2_trace.h | 2
2 files changed, 192 insertions(+), 6 deletions(-)
diff -puN fs/ocfs2/inode.c~ocfs2-check-fix-inode-block-for-online-file-check
fs/ocfs2/inode.c
--- a/fs/ocfs2/inode.c~ocfs2-check-fix-inode-block-for-online-file-check
+++ a/fs/ocfs2/inode.c
@@ -53,6 +53,7 @@
#include "xattr.h"
#include "refcounttree.h"
#include "ocfs2_trace.h"
+#include "filecheck.h"
#include "buffer_head_io.h"
@@ -74,6 +75,13 @@ static int ocfs2_truncate_for_delete(str
struct inode *inode,
struct buffer_head *fe_bh);
+static int ocfs2_filecheck_read_inode_block_full(struct inode *inode,
+ struct buffer_head **bh, int flags, int type);
+static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
+ struct buffer_head *bh);
+static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
+ struct buffer_head *bh);
+
void ocfs2_set_inode_flags(struct inode *inode)
{
unsigned int flags = OCFS2_I(inode)->ip_attr;
@@ -127,6 +135,7 @@ struct inode *ocfs2_ilookup(struct super
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
int sysfile_type)
{
+ int rc = 0;
struct inode *inode = NULL;
struct super_block *sb = osb->sb;
struct ocfs2_find_inode_args args;
@@ -161,12 +170,17 @@ struct inode *ocfs2_iget(struct ocfs2_su
}
trace_ocfs2_iget5_locked(inode->i_state);
if (inode->i_state & I_NEW) {
- ocfs2_read_locked_inode(inode, &args);
+ rc = ocfs2_read_locked_inode(inode, &args);
unlock_new_inode(inode);
}
if (is_bad_inode(inode)) {
iput(inode);
- inode = ERR_PTR(-ESTALE);
+ if ((flags & OCFS2_FI_FLAG_FILECHECK_CHK) ||
+ (flags & OCFS2_FI_FLAG_FILECHECK_FIX))
+ /* Return OCFS2_FILECHECK_ERR_XXX related errno */
+ inode = ERR_PTR(rc);
+ else
+ inode = ERR_PTR(-ESTALE);
goto bail;
}
@@ -494,16 +508,32 @@ static int ocfs2_read_locked_inode(struc
}
if (can_lock) {
- status = ocfs2_read_inode_block_full(inode, &bh,
- OCFS2_BH_IGNORE_CACHE);
+ if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK)
+ status = ocfs2_filecheck_read_inode_block_full(inode,
+ &bh, OCFS2_BH_IGNORE_CACHE, 0);
+ else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX)
+ status = ocfs2_filecheck_read_inode_block_full(inode,
+ &bh, OCFS2_BH_IGNORE_CACHE, 1);
+ else
+ status = ocfs2_read_inode_block_full(inode,
+ &bh, OCFS2_BH_IGNORE_CACHE);
} else {
status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
/*
* If buffer is in jbd, then its checksum may not have been
* computed as yet.
*/
- if (!status && !buffer_jbd(bh))
- status = ocfs2_validate_inode_block(osb->sb, bh);
+ if (!status && !buffer_jbd(bh)) {
+ if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK)
+ status = ocfs2_filecheck_validate_inode_block(
+ osb->sb, bh);
+ else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX)
+ status = ocfs2_filecheck_repair_inode_block(
+ osb->sb, bh);
+ else
+ status = ocfs2_validate_inode_block(
+ osb->sb, bh);
+ }
}
if (status < 0) {
mlog_errno(status);
@@ -531,6 +561,14 @@ static int ocfs2_read_locked_inode(struc
BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
+ if (buffer_dirty(bh)) {
+ status = ocfs2_write_block(osb, bh, INODE_CACHE(inode));
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
status = 0;
bail:
@@ -1396,6 +1434,152 @@ bail:
return rc;
}
+static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
+ struct buffer_head *bh)
+{
+ int rc = 0;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
+
+ trace_ocfs2_filecheck_validate_inode_block(
+ (unsigned long long)bh->b_blocknr);
+
+ BUG_ON(!buffer_uptodate(bh));
+
+ if (!OCFS2_IS_VALID_DINODE(di)) {
+ mlog(ML_ERROR,
+ "Filecheck: invalid dinode #%llu: signature = %.*s\n",
+ (unsigned long long)bh->b_blocknr, 7, di->i_signature);
+ rc = -OCFS2_FILECHECK_ERR_INVALIDINO;
+ goto bail;
+ }
+
+ rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
+ if (rc) {
+ mlog(ML_ERROR,
+ "Filecheck: checksum failed for dinode %llu\n",
+ (unsigned long long)bh->b_blocknr);
+ rc = -OCFS2_FILECHECK_ERR_BLOCKECC;
+ goto bail;
+ }
+
+ if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
+ mlog(ML_ERROR,
+ "Filecheck: invalid dinode #%llu: i_blkno is %llu\n",
+ (unsigned long long)bh->b_blocknr,
+ (unsigned long long)le64_to_cpu(di->i_blkno));
+ rc = -OCFS2_FILECHECK_ERR_BLOCKNO;
+ goto bail;
+ }
+
+ if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
+ mlog(ML_ERROR,
+ "Filecheck: invalid dinode #%llu: OCFS2_VALID_FL not set\n",
+ (unsigned long long)bh->b_blocknr);
+ rc = -OCFS2_FILECHECK_ERR_VALIDFLAG;
+ goto bail;
+ }
+
+ if (le32_to_cpu(di->i_fs_generation) !+ OCFS2_SB(sb)->fs_generation)
{
+ mlog(ML_ERROR,
+ "Filecheck: invalid dinode #%llu: fs_generation is %u\n",
+ (unsigned long long)bh->b_blocknr,
+ le32_to_cpu(di->i_fs_generation));
+ rc = -OCFS2_FILECHECK_ERR_GENERATION;
+ goto bail;
+ }
+
+bail:
+ return rc;
+}
+
+static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
+ struct buffer_head *bh)
+{
+ int rc;
+ int changed = 0;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
+
+ rc = ocfs2_filecheck_validate_inode_block(sb, bh);
+ /* Can't fix invalid inode block */
+ if (!rc || rc == -OCFS2_FILECHECK_ERR_INVALIDINO)
+ return rc;
+
+ trace_ocfs2_filecheck_repair_inode_block(
+ (unsigned long long)bh->b_blocknr);
+
+ if (ocfs2_is_hard_readonly(OCFS2_SB(sb)) ||
+ ocfs2_is_soft_readonly(OCFS2_SB(sb))) {
+ mlog(ML_ERROR,
+ "Filecheck: try to repair dinode #%llu on readonly filesystem\n",
+ (unsigned long long)bh->b_blocknr);
+ return -OCFS2_FILECHECK_ERR_READONLY;
+ }
+
+ if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
+ di->i_blkno = cpu_to_le64(bh->b_blocknr);
+ changed = 1;
+ mlog(ML_ERROR,
+ "Filecheck: reset dinode #%llu: i_blkno to %llu\n",
+ (unsigned long long)bh->b_blocknr,
+ (unsigned long long)le64_to_cpu(di->i_blkno));
+ }
+
+ if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
+ di->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
+ changed = 1;
+ mlog(ML_ERROR,
+ "Filecheck: reset dinode #%llu: OCFS2_VALID_FL is set\n",
+ (unsigned long long)bh->b_blocknr);
+ }
+
+ if (le32_to_cpu(di->i_fs_generation) !+ OCFS2_SB(sb)->fs_generation)
{
+ di->i_fs_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation);
+ changed = 1;
+ mlog(ML_ERROR,
+ "Filecheck: reset dinode #%llu: fs_generation to %u\n",
+ (unsigned long long)bh->b_blocknr,
+ le32_to_cpu(di->i_fs_generation));
+ }
+
+ if (changed ||
+ ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check)) {
+ ocfs2_compute_meta_ecc(sb, bh->b_data, &di->i_check);
+ mark_buffer_dirty(bh);
+ mlog(ML_ERROR,
+ "Filecheck: reset dinode #%llu: compute meta ecc\n",
+ (unsigned long long)bh->b_blocknr);
+ }
+
+ return 0;
+}
+
+static int
+ocfs2_filecheck_read_inode_block_full(struct inode *inode,
+ struct buffer_head **bh, int flags, int type)
+{
+ int rc;
+ struct buffer_head *tmp = *bh;
+
+ if (!type) /* Check inode block */
+ rc = ocfs2_read_blocks(INODE_CACHE(inode),
+ OCFS2_I(inode)->ip_blkno,
+ 1, &tmp, flags,
+ ocfs2_filecheck_validate_inode_block);
+ else /* Repair inode block */
+ rc = ocfs2_read_blocks(INODE_CACHE(inode),
+ OCFS2_I(inode)->ip_blkno,
+ 1, &tmp, flags,
+ ocfs2_filecheck_repair_inode_block);
+
+ /* If ocfs2_read_blocks() got us a new bh, pass it up. */
+ if (!rc && !*bh)
+ *bh = tmp;
+
+ return rc;
+}
+
int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
int flags)
{
diff -puN
fs/ocfs2/ocfs2_trace.h~ocfs2-check-fix-inode-block-for-online-file-check
fs/ocfs2/ocfs2_trace.h
--- a/fs/ocfs2/ocfs2_trace.h~ocfs2-check-fix-inode-block-for-online-file-check
+++ a/fs/ocfs2/ocfs2_trace.h
@@ -1540,6 +1540,8 @@ DEFINE_OCFS2_ULL_INT_EVENT(ocfs2_read_lo
DEFINE_OCFS2_INT_INT_EVENT(ocfs2_check_orphan_recovery_state);
DEFINE_OCFS2_ULL_EVENT(ocfs2_validate_inode_block);
+DEFINE_OCFS2_ULL_EVENT(ocfs2_filecheck_validate_inode_block);
+DEFINE_OCFS2_ULL_EVENT(ocfs2_filecheck_repair_inode_block);
TRACE_EVENT(ocfs2_inode_is_valid_to_delete,
TP_PROTO(void *task, void *dc_task, unsigned long long ino,
_