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| author | Theodore Ts'o <tytso@mit.edu> | 2017-02-05 01:28:48 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2017-02-05 01:28:48 -0500 |
| commit | 0db1ff222d40f1601c961f0edb86d10426992595 (patch) | |
| tree | 74c6613fb9f3fba41ff3fc90e0db69d9df20490c /fs/ext4/file.c | |
| parent | 9549a168bd500db1a76914e50775f7cd1690acef (diff) | |
| download | linux-0db1ff222d40f1601c961f0edb86d10426992595.tar.gz | |
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>
Diffstat (limited to 'fs/ext4/file.c')
| -rw-r--r-- | fs/ext4/file.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index d663d3d7c81cb..ff3f6107b0ba3 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -57,6 +57,9 @@ static ssize_t ext4_dax_read_iter(struct kiocb *iocb, struct iov_iter *to) static ssize_t ext4_file_read_iter(struct kiocb *iocb, struct iov_iter *to) { + if (unlikely(ext4_forced_shutdown(EXT4_SB(file_inode(iocb->ki_filp)->i_sb)))) + return -EIO; + if (!iov_iter_count(to)) return 0; /* skip atime */ @@ -213,6 +216,9 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from) int overwrite = 0; ssize_t ret; + if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) + return -EIO; + #ifdef CONFIG_FS_DAX if (IS_DAX(inode)) return ext4_dax_write_iter(iocb, from); @@ -348,6 +354,9 @@ static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma) { struct inode *inode = file->f_mapping->host; + if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) + return -EIO; + if (ext4_encrypted_inode(inode)) { int err = fscrypt_get_encryption_info(inode); if (err) @@ -375,6 +384,9 @@ static int ext4_file_open(struct inode * inode, struct file * filp) char buf[64], *cp; int ret; + if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) + return -EIO; + if (unlikely(!(sbi->s_mount_flags & EXT4_MF_MNTDIR_SAMPLED) && !(sb->s_flags & MS_RDONLY))) { sbi->s_mount_flags |= EXT4_MF_MNTDIR_SAMPLED; |