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authorSteve French <stfrench@microsoft.com>2021-04-29 08:18:43 +0300
committerSteve French <stfrench@microsoft.com>2021-05-03 19:21:22 +0300
commit087f757b0129850c99cc9116df4909dac1bce871 (patch)
treec284e0a56d512373e466b67aaed48a60403ae7c5 /fs/cifs/dir.c
parentc3f207ab29f793b8c942ce8067ed123f18d5b81b (diff)
downloadlinux-087f757b0129850c99cc9116df4909dac1bce871.tar.xz
cifs: add shutdown support
Various filesystem support the shutdown ioctl which is used by various xfstests. The shutdown ioctl sets a flag on the superblock which prevents open, unlink, symlink, hardlink, rmdir, create etc. on the file system until unmount and remounted. The two flags supported in this patch are: FSOP_GOING_FLAGS_LOGFLUSH and FSOP_GOING_FLAGS_NOLOGFLUSH which require very little other than blocking new operations (since we do not cache writes to metadata on the client with cifs.ko). FSOP_GOING_FLAGS_DEFAULT is not supported yet, but could be added in the future but would need to call syncfs or equivalent to write out pending data on the mount. With this patch various xfstests now work including tests 043 through 046 for example. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Diffstat (limited to 'fs/cifs/dir.c')
-rw-r--r--fs/cifs/dir.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 03afad8b24af..263720131986 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -34,6 +34,7 @@
#include "cifs_fs_sb.h"
#include "cifs_unicode.h"
#include "fs_context.h"
+#include "cifs_ioctl.h"
static void
renew_parental_timestamps(struct dentry *direntry)
@@ -429,6 +430,9 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
__u32 oplock;
struct cifsFileInfo *file_info;
+ if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb))))
+ return -EIO;
+
/*
* Posix open is only called (at lookup time) for file create now. For
* opens (rather than creates), because we do not know if it is a file
@@ -545,6 +549,9 @@ int cifs_create(struct user_namespace *mnt_userns, struct inode *inode,
cifs_dbg(FYI, "cifs_create parent inode = 0x%p name is: %pd and dentry = 0x%p\n",
inode, direntry, direntry);
+ if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb))))
+ return -EIO;
+
tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
rc = PTR_ERR(tlink);
if (IS_ERR(tlink))
@@ -582,6 +589,9 @@ int cifs_mknod(struct user_namespace *mnt_userns, struct inode *inode,
return -EINVAL;
cifs_sb = CIFS_SB(inode->i_sb);
+ if (unlikely(cifs_forced_shutdown(cifs_sb)))
+ return -EIO;
+
tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink))
return PTR_ERR(tlink);