diff options
| author | Eric Paris <eparis@redhat.com> | 2008-07-04 09:47:13 +1000 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2008-07-14 15:02:05 +1000 |
| commit | 2069f457848f846cb31149c9aa29b330a6b66d1b (patch) | |
| tree | 199e7bb15e7d7b5cf008cd6fdb6cefc0d6af7f13 /security | |
| parent | 811f3799279e567aa354c649ce22688d949ac7a9 (diff) | |
| download | linux-3.10-2069f457848f846cb31149c9aa29b330a6b66d1b.tar.gz linux-3.10-2069f457848f846cb31149c9aa29b330a6b66d1b.tar.bz2 linux-3.10-2069f457848f846cb31149c9aa29b330a6b66d1b.zip | |
LSM/SELinux: show LSM mount options in /proc/mounts
This patch causes SELinux mount options to show up in /proc/mounts. As
with other code in the area seq_put errors are ignored. Other LSM's
will not have their mount options displayed until they fill in their own
security_sb_show_options() function.
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
| -rw-r--r-- | security/dummy.c | 6 | ||||
| -rw-r--r-- | security/security.c | 5 | ||||
| -rw-r--r-- | security/selinux/hooks.c | 55 |
3 files changed, 65 insertions, 1 deletions
diff --git a/security/dummy.c b/security/dummy.c index 1db712d99dc..c155f08e9dd 100644 --- a/security/dummy.c +++ b/security/dummy.c @@ -194,6 +194,11 @@ static int dummy_sb_kern_mount (struct super_block *sb, void *data) return 0; } +static int dummy_sb_show_options(struct seq_file *m, struct super_block *sb) +{ + return 0; +} + static int dummy_sb_statfs (struct dentry *dentry) { return 0; @@ -1088,6 +1093,7 @@ void security_fixup_ops (struct security_operations *ops) set_to_dummy_if_null(ops, sb_free_security); set_to_dummy_if_null(ops, sb_copy_data); set_to_dummy_if_null(ops, sb_kern_mount); + set_to_dummy_if_null(ops, sb_show_options); set_to_dummy_if_null(ops, sb_statfs); set_to_dummy_if_null(ops, sb_mount); set_to_dummy_if_null(ops, sb_check_sb); diff --git a/security/security.c b/security/security.c index 2c0a5876b93..de74fdccde2 100644 --- a/security/security.c +++ b/security/security.c @@ -292,6 +292,11 @@ int security_sb_kern_mount(struct super_block *sb, void *data) return security_ops->sb_kern_mount(sb, data); } +int security_sb_show_options(struct seq_file *m, struct super_block *sb) +{ + return security_ops->sb_show_options(m, sb); +} + int security_sb_statfs(struct dentry *dentry) { return security_ops->sb_statfs(dentry); diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 85f74f66576..33dee83fdd2 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -9,7 +9,8 @@ * James Morris <jmorris@redhat.com> * * Copyright (C) 2001,2002 Networks Associates Technology, Inc. - * Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com> + * Copyright (C) 2003-2008 Red Hat, Inc., James Morris <jmorris@redhat.com> + * Eric Paris <eparis@redhat.com> * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc. * <dgoeddel@trustedcs.com> * Copyright (C) 2006, 2007 Hewlett-Packard Development Company, L.P. @@ -970,6 +971,57 @@ out_err: return rc; } +void selinux_write_opts(struct seq_file *m, struct security_mnt_opts *opts) +{ + int i; + char *prefix; + + for (i = 0; i < opts->num_mnt_opts; i++) { + char *has_comma = strchr(opts->mnt_opts[i], ','); + + switch (opts->mnt_opts_flags[i]) { + case CONTEXT_MNT: + prefix = CONTEXT_STR; + break; + case FSCONTEXT_MNT: + prefix = FSCONTEXT_STR; + break; + case ROOTCONTEXT_MNT: + prefix = ROOTCONTEXT_STR; + break; + case DEFCONTEXT_MNT: + prefix = DEFCONTEXT_STR; + break; + default: + BUG(); + }; + /* we need a comma before each option */ + seq_putc(m, ','); + seq_puts(m, prefix); + if (has_comma) + seq_putc(m, '\"'); + seq_puts(m, opts->mnt_opts[i]); + if (has_comma) + seq_putc(m, '\"'); + } +} + +static int selinux_sb_show_options(struct seq_file *m, struct super_block *sb) +{ + struct security_mnt_opts opts; + int rc; + + rc = selinux_get_mnt_opts(sb, &opts); + if (rc) + return rc; + + selinux_write_opts(m, &opts); + + security_free_mnt_opts(&opts); + + return rc; +} + static inline u16 inode_mode_to_security_class(umode_t mode) { switch (mode & S_IFMT) { @@ -5365,6 +5417,7 @@ static struct security_operations selinux_ops = { .sb_free_security = selinux_sb_free_security, .sb_copy_data = selinux_sb_copy_data, .sb_kern_mount = selinux_sb_kern_mount, + .sb_show_options = selinux_sb_show_options, .sb_statfs = selinux_sb_statfs, .sb_mount = selinux_mount, .sb_umount = selinux_umount, |