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cifs: remove unneeded NULL checks from cifs_show_options 

show_options is always called with the namespace_sem held. Therefore we
don't need to worry about the vfsmount being NULL, or it vanishing while
the function is running. By the same token, there's no need to worry
about the superblock, tcon, smb or tcp sessions being NULL on entry.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton 2009-06-11 10:27:28 -04:00 committed by Steve French
parent f3ad116588
commit 8616e0fc1e
1 changed files with 58 additions and 70 deletions
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128
fs/cifs/cifsfs.c
View File

@ -346,80 +346,68 @@ cifs_show_options(struct seq_file *s, struct vfsmount *m)
struct TCP_Server_Info *server;
cifs_sb = CIFS_SB(m->mnt_sb);
tcon = cifs_sb->tcon;
if (cifs_sb) {
tcon = cifs_sb->tcon;
if (tcon) {
seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName);
if (tcon->ses) {
if (tcon->ses->userName)
seq_printf(s, ",username=%s",
tcon->ses->userName);
if (tcon->ses->domainName)
seq_printf(s, ",domain=%s",
tcon->ses->domainName);
server = tcon->ses->server;
if (server) {
seq_printf(s, ",addr=");
switch (server->addr.sockAddr6.
sin6_family) {
case AF_INET6:
seq_printf(s, "%pI6",
&server->addr.sockAddr6.sin6_addr);
break;
case AF_INET:
seq_printf(s, "%pI4",
&server->addr.sockAddr.sin_addr.s_addr);
break;
}
}
}
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) ||
!(tcon->unix_ext))
seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) ||
!(tcon->unix_ext))
seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
if (!tcon->unix_ext) {
seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName);
if (tcon->ses->userName)
seq_printf(s, ",username=%s", tcon->ses->userName);
if (tcon->ses->domainName)
seq_printf(s, ",domain=%s", tcon->ses->domainName);
cifs_show_address(s, tcon->ses->server);
seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
server = tcon->ses->server;
seq_printf(s, ",addr=");
switch (server->addr.sockAddr6.sin6_family) {
case AF_INET6:
seq_printf(s, "%pI6", &server->addr.sockAddr6.sin6_addr);
break;
case AF_INET:
seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr);
break;
}
if (!tcon->unix_ext)
seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
cifs_sb->mnt_file_mode,
cifs_sb->mnt_dir_mode);
}
if (tcon->seal)
seq_printf(s, ",seal");
if (tcon->nocase)
seq_printf(s, ",nocase");
if (tcon->retry)
seq_printf(s, ",hard");
}
if (cifs_sb->prepath)
seq_printf(s, ",prepath=%s", cifs_sb->prepath);
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
seq_printf(s, ",posixpaths");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
seq_printf(s, ",setuids");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
seq_printf(s, ",serverino");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
seq_printf(s, ",directio");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
seq_printf(s, ",nouser_xattr");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
seq_printf(s, ",mapchars");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
seq_printf(s, ",sfu");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
seq_printf(s, ",nobrl");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
seq_printf(s, ",cifsacl");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
seq_printf(s, ",dynperm");
if (m->mnt_sb->s_flags & MS_POSIXACL)
seq_printf(s, ",acl");
if (tcon->seal)
seq_printf(s, ",seal");
if (tcon->nocase)
seq_printf(s, ",nocase");
if (tcon->retry)
seq_printf(s, ",hard");
if (cifs_sb->prepath)
seq_printf(s, ",prepath=%s", cifs_sb->prepath);
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
seq_printf(s, ",posixpaths");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
seq_printf(s, ",setuids");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
seq_printf(s, ",serverino");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
seq_printf(s, ",directio");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
seq_printf(s, ",nouser_xattr");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
seq_printf(s, ",mapchars");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
seq_printf(s, ",sfu");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
seq_printf(s, ",nobrl");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
seq_printf(s, ",cifsacl");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
seq_printf(s, ",dynperm");
if (m->mnt_sb->s_flags & MS_POSIXACL)
seq_printf(s, ",acl");
seq_printf(s, ",rsize=%d", cifs_sb->rsize);
seq_printf(s, ",wsize=%d", cifs_sb->wsize);
seq_printf(s, ",rsize=%d", cifs_sb->rsize);
seq_printf(s, ",wsize=%d", cifs_sb->wsize);
}
return 0;
}