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authorDavid Howells <dhowells@redhat.com>2017-07-05 16:25:03 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2017-07-11 06:06:17 -0400
commit3ab7947ac3b5cd625c186bb608678bffd881e472 (patch)
treed1487e21f4c1cc3f6a3fef517814c2476a3c9256 /fs/befs
parenta66ca4146f3f736ff968c099926ccb1c1761b1a4 (diff)
downloadlinux-3ab7947ac3b5cd625c186bb608678bffd881e472.tar.bz2
befs: Implement show_options
Implement the show_options superblock op for befs as part of a bid to get rid of s_options and generic_show_options() to make it easier to implement a context-based mount where the mount options can be passed individually over a file descriptor. Signed-off-by: David Howells <dhowells@redhat.com> cc: Luis de Bethencourt <luisbg@osg.samsung.com> cc: Salah Triki <salah.triki@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/befs')
-rw-r--r--fs/befs/linuxvfs.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 63e7c4760bfb..4a4a5a366158 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -20,6 +20,7 @@
#include <linux/sched.h>
#include <linux/cred.h>
#include <linux/exportfs.h>
+#include <linux/seq_file.h>
#include "befs.h"
#include "btree.h"
@@ -53,6 +54,7 @@ static int befs_nls2utf(struct super_block *sb, const char *in, int in_len,
static void befs_put_super(struct super_block *);
static int befs_remount(struct super_block *, int *, char *);
static int befs_statfs(struct dentry *, struct kstatfs *);
+static int befs_show_options(struct seq_file *, struct dentry *);
static int parse_options(char *, struct befs_mount_options *);
static struct dentry *befs_fh_to_dentry(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type);
@@ -66,7 +68,7 @@ static const struct super_operations befs_sops = {
.put_super = befs_put_super, /* uninit super */
.statfs = befs_statfs, /* statfs */
.remount_fs = befs_remount,
- .show_options = generic_show_options,
+ .show_options = befs_show_options,
};
/* slab cache for befs_inode_info objects */
@@ -771,6 +773,24 @@ parse_options(char *options, struct befs_mount_options *opts)
return 1;
}
+static int befs_show_options(struct seq_file *m, struct dentry *root)
+{
+ struct befs_sb_info *befs_sb = BEFS_SB(root->d_sb);
+ struct befs_mount_options *opts = &befs_sb->mount_opts;
+
+ if (!uid_eq(opts->uid, GLOBAL_ROOT_UID))
+ seq_printf(m, ",uid=%u",
+ from_kuid_munged(&init_user_ns, opts->uid));
+ if (!gid_eq(opts->gid, GLOBAL_ROOT_GID))
+ seq_printf(m, ",gid=%u",
+ from_kgid_munged(&init_user_ns, opts->gid));
+ if (opts->iocharset)
+ seq_printf(m, ",charset=%s", opts->iocharset);
+ if (opts->debug)
+ seq_puts(m, ",debug");
+ return 0;
+}
+
/* This function has the responsibiltiy of getting the
* filesystem ready for unmounting.
* Basically, we free everything that we allocated in
@@ -804,8 +824,6 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
const off_t x86_sb_off = 512;
int blocksize;
- save_mount_options(sb, data);
-
sb->s_fs_info = kzalloc(sizeof(*befs_sb), GFP_KERNEL);
if (sb->s_fs_info == NULL)
goto unacquire_none;