diff options
| author | Ronnie Sahlberg <lsahlber@redhat.com> | 2021-03-09 09:07:30 +1000 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-04-25 16:28:23 -0500 |
| commit | 269f67e1ffead61777b1b0cf2ea0f61d06f8c56d (patch) | |
| tree | 25800d121bcc16a69448c4aa33fb2e4c85c4daa6 /fs/cifs | |
| parent | 45c0f1aabea9e6acc5332b93faca9803c6e9b19a (diff) | |
| download | linux-269f67e1ffead61777b1b0cf2ea0f61d06f8c56d.tar.bz2 | |
cifs: store a pointer to the root dentry in cifs_sb_info once we have completed mounting the share
And use this to only allow to take out a shared handle once the mount has completed and the
sb becomes available.
This will become important in follow up patches where we will start holding a reference to the
directory dentry for the shared handle during the lifetime of the handle.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/cifs_fs_sb.h | 4 | ||||
| -rw-r--r-- | fs/cifs/cifsfs.c | 9 | ||||
| -rw-r--r-- | fs/cifs/smb2ops.c | 5 |
3 files changed, 17 insertions, 1 deletions
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h index aa77edc12212..2a5325a7ae49 100644 --- a/fs/cifs/cifs_fs_sb.h +++ b/fs/cifs/cifs_fs_sb.h @@ -81,5 +81,9 @@ struct cifs_sb_info { * (cifs_autodisable_serverino) in order to match new mounts. */ bool mnt_cifs_serverino_autodisabled; + /* + * Available once the mount has completed. + */ + struct dentry *root; }; #endif /* _CIFS_FS_SB_H */ diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 8dc2306c9092..cf8eceb1d5a5 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -257,6 +257,12 @@ out_no_root: static void cifs_kill_sb(struct super_block *sb) { struct cifs_sb_info *cifs_sb = CIFS_SB(sb); + + if (cifs_sb->root) { + dput(cifs_sb->root); + cifs_sb->root = NULL; + } + kill_anon_super(sb); cifs_umount(cifs_sb); } @@ -886,6 +892,9 @@ cifs_smb3_do_mount(struct file_system_type *fs_type, if (IS_ERR(root)) goto out_super; + if (cifs_sb) + cifs_sb->root = dget(root); + cifs_dbg(FYI, "dentry root is: %p\n", root); return root; diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 89269a5c02c7..3ff460035705 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -751,8 +751,11 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon, if (tcon->nohandlecache) return -ENOTSUPP; + if (cifs_sb->root == NULL) + return -ENOENT; + if (strlen(path)) - return -ENOTSUPP; + return -ENOENT; mutex_lock(&tcon->crfid.fid_mutex); if (tcon->crfid.is_valid) { |