ext4: add shutdown bit and check for it
Add a shutdown bit that will cause ext4 processing to fail immediately
with EIO.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 514e5fc..cfa4ce5 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -438,6 +438,9 @@ void __ext4_error(struct super_block *sb, const char *function,
struct va_format vaf;
va_list args;
+ if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
+ return;
+
if (ext4_error_ratelimit(sb)) {
va_start(args, fmt);
vaf.fmt = fmt;
@@ -459,6 +462,9 @@ void __ext4_error_inode(struct inode *inode, const char *function,
struct va_format vaf;
struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
+ if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
+ return;
+
es->s_last_error_ino = cpu_to_le32(inode->i_ino);
es->s_last_error_block = cpu_to_le64(block);
if (ext4_error_ratelimit(inode->i_sb)) {
@@ -491,6 +497,9 @@ void __ext4_error_file(struct file *file, const char *function,
struct inode *inode = file_inode(file);
char pathname[80], *path;
+ if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
+ return;
+
es = EXT4_SB(inode->i_sb)->s_es;
es->s_last_error_ino = cpu_to_le32(inode->i_ino);
if (ext4_error_ratelimit(inode->i_sb)) {
@@ -567,6 +576,9 @@ void __ext4_std_error(struct super_block *sb, const char *function,
char nbuf[16];
const char *errstr;
+ if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
+ return;
+
/* Special case: if the error is EROFS, and we're not already
* inside a transaction, then there's really no point in logging
* an error. */
@@ -600,6 +612,9 @@ void __ext4_abort(struct super_block *sb, const char *function,
struct va_format vaf;
va_list args;
+ if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
+ return;
+
save_error_info(sb, function, line);
va_start(args, fmt);
vaf.fmt = fmt;
@@ -695,6 +710,9 @@ __acquires(bitlock)
va_list args;
struct ext4_super_block *es = EXT4_SB(sb)->s_es;
+ if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
+ return;
+
es->s_last_error_ino = cpu_to_le32(ino);
es->s_last_error_block = cpu_to_le64(block);
__save_error_info(sb, function, line);
@@ -4717,6 +4735,9 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
bool needs_barrier = false;
struct ext4_sb_info *sbi = EXT4_SB(sb);
+ if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
+ return 0;
+
trace_ext4_sync_fs(sb, wait);
flush_workqueue(sbi->rsv_conversion_wq);
/*
