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| author | Steve French <stfrench@microsoft.com> | 2021-04-29 00:18:43 -0500 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-05-03 11:21:22 -0500 |
| commit | 087f757b0129850c99cc9116df4909dac1bce871 (patch) | |
| tree | c284e0a56d512373e466b67aaed48a60403ae7c5 /fs/cifs/xattr.c | |
| parent | c3f207ab29f793b8c942ce8067ed123f18d5b81b (diff) | |
| download | lwn-087f757b0129850c99cc9116df4909dac1bce871.tar.gz lwn-087f757b0129850c99cc9116df4909dac1bce871.zip | |
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/xattr.c')
| -rw-r--r-- | fs/cifs/xattr.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c index e351b945135b..aa3e8ca0457c 100644 --- a/fs/cifs/xattr.c +++ b/fs/cifs/xattr.c @@ -30,6 +30,7 @@ #include "cifs_debug.h" #include "cifs_fs_sb.h" #include "cifs_unicode.h" +#include "cifs_ioctl.h" #define MAX_EA_VALUE_SIZE CIFSMaxBufSize #define CIFS_XATTR_CIFS_ACL "system.cifs_acl" /* DACL only */ @@ -421,6 +422,9 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size) const char *full_path; void *page; + if (unlikely(cifs_forced_shutdown(cifs_sb))) + return -EIO; + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) return -EOPNOTSUPP; |