Convert the adfs filesystem to use the new mount API.
Tested by comparing random mount & remount options before and after
the change.
Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
---
fs/adfs/super.c | 186 +++++++++++++++++++++++++-----------------------
1 file changed, 95 insertions(+), 91 deletions(-)
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index f0b999a4961b..017c48a80203 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -6,7 +6,8 @@
*/
#include <linux/module.h>
#include <linux/init.h>
-#include <linux/parser.h>
+#include <linux/fs_parser.h>
+#include <linux/fs_context.h>
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
@@ -115,87 +116,61 @@ static int adfs_show_options(struct seq_file *seq, struct dentry *root)
return 0;
}
-enum {Opt_uid, Opt_gid, Opt_ownmask, Opt_othmask, Opt_ftsuffix, Opt_err};
+enum {Opt_uid, Opt_gid, Opt_ownmask, Opt_othmask, Opt_ftsuffix};
-static const match_table_t tokens = {
- {Opt_uid, "uid=%u"},
- {Opt_gid, "gid=%u"},
- {Opt_ownmask, "ownmask=%o"},
- {Opt_othmask, "othmask=%o"},
- {Opt_ftsuffix, "ftsuffix=%u"},
- {Opt_err, NULL}
+static const struct fs_parameter_spec adfs_param_spec[] = {
+ fsparam_uid ("uid", Opt_uid),
+ fsparam_gid ("gid", Opt_gid),
+ fsparam_u32oct ("ownmask", Opt_ownmask),
+ fsparam_u32oct ("othmask", Opt_othmask),
+ fsparam_u32 ("ftsuffix", Opt_ftsuffix),
+ {}
};
-static int parse_options(struct super_block *sb, struct adfs_sb_info *asb,
- char *options)
+static int adfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
{
- char *p;
- int option;
-
- if (!options)
- return 0;
-
- while ((p = strsep(&options, ",")) != NULL) {
- substring_t args[MAX_OPT_ARGS];
- int token;
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_uid:
- if (match_int(args, &option))
- return -EINVAL;
- asb->s_uid = make_kuid(current_user_ns(), option);
- if (!uid_valid(asb->s_uid))
- return -EINVAL;
- break;
- case Opt_gid:
- if (match_int(args, &option))
- return -EINVAL;
- asb->s_gid = make_kgid(current_user_ns(), option);
- if (!gid_valid(asb->s_gid))
- return -EINVAL;
- break;
- case Opt_ownmask:
- if (match_octal(args, &option))
- return -EINVAL;
- asb->s_owner_mask = option;
- break;
- case Opt_othmask:
- if (match_octal(args, &option))
- return -EINVAL;
- asb->s_other_mask = option;
- break;
- case Opt_ftsuffix:
- if (match_int(args, &option))
- return -EINVAL;
- asb->s_ftsuffix = option;
- break;
- default:
- adfs_msg(sb, KERN_ERR,
- "unrecognised mount option \"%s\" or missing value",
- p);
- return -EINVAL;
- }
+ struct adfs_sb_info *asb = fc->s_fs_info;
+ struct fs_parse_result result;
+ int opt;
+
+ opt = fs_parse(fc, adfs_param_spec, param, &result);
+ if (opt < 0)
+ return opt;
+
+ switch (opt) {
+ case Opt_uid:
+ asb->s_uid = result.uid;
+ break;
+ case Opt_gid:
+ asb->s_gid = result.gid;
+ break;
+ case Opt_ownmask:
+ asb->s_owner_mask = result.uint_32;
+ break;
+ case Opt_othmask:
+ asb->s_other_mask = result.uint_32;
+ break;
+ case Opt_ftsuffix:
+ asb->s_ftsuffix = result.uint_32;
+ break;
+ default:
+ return -EINVAL;
}
return 0;
}
-static int adfs_remount(struct super_block *sb, int *flags, char *data)
+static int adfs_reconfigure(struct fs_context *fc)
{
- struct adfs_sb_info temp_asb;
- int ret;
+ struct adfs_sb_info *new_asb = fc->s_fs_info;
+ struct adfs_sb_info *asb = ADFS_SB(fc->root->d_sb);
- sync_filesystem(sb);
- *flags |= ADFS_SB_FLAGS;
+ sync_filesystem(fc->root->d_sb);
+ fc->sb_flags |= ADFS_SB_FLAGS;
- temp_asb = *ADFS_SB(sb);
- ret = parse_options(sb, &temp_asb, data);
- if (ret == 0)
- *ADFS_SB(sb) = temp_asb;
+ /* Structure copy newly parsed options */
+ *asb = *new_asb;
- return ret;
+ return 0;
}
static int adfs_statfs(struct dentry *dentry, struct kstatfs *buf)
@@ -273,7 +248,6 @@ static const struct super_operations adfs_sops = {
.write_inode = adfs_write_inode,
.put_super = adfs_put_super,
.statfs = adfs_statfs,
- .remount_fs = adfs_remount,
.show_options = adfs_show_options,
};
@@ -361,34 +335,21 @@ static int adfs_validate_dr0(struct super_block *sb, struct buffer_head *bh,
return 0;
}
-static int adfs_fill_super(struct super_block *sb, void *data, int silent)
+static int adfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct adfs_discrecord *dr;
struct object_info root_obj;
- struct adfs_sb_info *asb;
+ struct adfs_sb_info *asb = sb->s_fs_info;
struct inode *root;
int ret = -EINVAL;
+ int silent = fc->sb_flags & SB_SILENT;
sb->s_flags |= ADFS_SB_FLAGS;
- asb = kzalloc(sizeof(*asb), GFP_KERNEL);
- if (!asb)
- return -ENOMEM;
-
sb->s_fs_info = asb;
sb->s_magic = ADFS_SUPER_MAGIC;
sb->s_time_gran = 10000000;
- /* set default options */
- asb->s_uid = GLOBAL_ROOT_UID;
- asb->s_gid = GLOBAL_ROOT_GID;
- asb->s_owner_mask = ADFS_DEFAULT_OWNER_MASK;
- asb->s_other_mask = ADFS_DEFAULT_OTHER_MASK;
- asb->s_ftsuffix = 0;
-
- if (parse_options(sb, asb, data))
- goto error;
-
/* Try to probe the filesystem boot block */
ret = adfs_probe(sb, ADFS_DISCRECORD, 1, adfs_validate_bblk);
if (ret == -EILSEQ)
@@ -453,18 +414,61 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
return ret;
}
-static struct dentry *adfs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int adfs_get_tree(struct fs_context *fc)
+{
+ return get_tree_bdev(fc, adfs_fill_super);
+}
+
+static void adfs_free_fc(struct fs_context *fc)
{
- return mount_bdev(fs_type, flags, dev_name, data, adfs_fill_super);
+ struct adfs_context *asb = fc->s_fs_info;
+
+ kfree(asb);
+}
+
+static const struct fs_context_operations adfs_context_ops = {
+ .parse_param = adfs_parse_param,
+ .get_tree = adfs_get_tree,
+ .reconfigure = adfs_reconfigure,
+ .free = adfs_free_fc,
+};
+
+static int adfs_init_fs_context(struct fs_context *fc)
+{
+ struct adfs_sb_info *asb;
+
+ asb = kzalloc(sizeof(struct adfs_sb_info), GFP_KERNEL);
+ if (!asb)
+ return -ENOMEM;
+
+ if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
+ struct super_block *sb = fc->root->d_sb;
+ struct adfs_sb_info *old_asb = ADFS_SB(sb);
+
+ /* structure copy existing options before parsing */
+ *asb = *old_asb;
+ } else {
+ /* set default options */
+ asb->s_uid = GLOBAL_ROOT_UID;
+ asb->s_gid = GLOBAL_ROOT_GID;
+ asb->s_owner_mask = ADFS_DEFAULT_OWNER_MASK;
+ asb->s_other_mask = ADFS_DEFAULT_OTHER_MASK;
+ asb->s_ftsuffix = 0;
+ }
+
+ fc->ops = &adfs_context_ops;
+ fc->s_fs_info = asb;
+
+ return 0;
}
static struct file_system_type adfs_fs_type = {
.owner = THIS_MODULE,
.name = "adfs",
- .mount = adfs_mount,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
+ .init_fs_context = adfs_init_fs_context,
+ .parameters = adfs_param_spec,
};
MODULE_ALIAS_FS("adfs");
--
2.46.0
