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-rw-r--r--fs/ramfs/inode.c99
1 files changed, 58 insertions, 41 deletions
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index b85d1e77e934..d82636e8eb65 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -36,6 +36,8 @@
#include <linux/magic.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
#include "internal.h"
struct ramfs_mount_opts {
@@ -175,62 +177,52 @@ static const struct super_operations ramfs_ops = {
.show_options = ramfs_show_options,
};
-enum {
+enum ramfs_param {
Opt_mode,
- Opt_err
};
-static const match_table_t tokens = {
- {Opt_mode, "mode=%o"},
- {Opt_err, NULL}
+static const struct fs_parameter_spec ramfs_param_specs[] = {
+ fsparam_u32oct("mode", Opt_mode),
+ {}
};
-static int ramfs_parse_options(char *data, struct ramfs_mount_opts *opts)
+const struct fs_parameter_description ramfs_fs_parameters = {
+ .name = "ramfs",
+ .specs = ramfs_param_specs,
+};
+
+static int ramfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
{
- substring_t args[MAX_OPT_ARGS];
- int option;
- int token;
- char *p;
-
- opts->mode = RAMFS_DEFAULT_MODE;
-
- while ((p = strsep(&data, ",")) != NULL) {
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_mode:
- if (match_octal(&args[0], &option))
- return -EINVAL;
- opts->mode = option & S_IALLUGO;
- break;
+ struct fs_parse_result result;
+ struct ramfs_fs_info *fsi = fc->s_fs_info;
+ int opt;
+
+ opt = fs_parse(fc, &ramfs_fs_parameters, param, &result);
+ if (opt < 0) {
/*
* We might like to report bad mount options here;
* but traditionally ramfs has ignored all mount options,
* and as it is used as a !CONFIG_SHMEM simple substitute
* for tmpfs, better continue to ignore other mount options.
*/
- }
+ if (opt == -ENOPARAM)
+ opt = 0;
+ return opt;
+ }
+
+ switch (opt) {
+ case Opt_mode:
+ fsi->mount_opts.mode = result.uint_32 & S_IALLUGO;
+ break;
}
return 0;
}
-static int ramfs_fill_super(struct super_block *sb, void *data, int silent)
+static int ramfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
- struct ramfs_fs_info *fsi;
+ struct ramfs_fs_info *fsi = sb->s_fs_info;
struct inode *inode;
- int err;
-
- fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL);
- sb->s_fs_info = fsi;
- if (!fsi)
- return -ENOMEM;
-
- err = ramfs_parse_options(data, &fsi->mount_opts);
- if (err)
- return err;
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_SIZE;
@@ -247,10 +239,34 @@ static int ramfs_fill_super(struct super_block *sb, void *data, int silent)
return 0;
}
-struct dentry *ramfs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int ramfs_get_tree(struct fs_context *fc)
{
- return mount_nodev(fs_type, flags, data, ramfs_fill_super);
+ return get_tree_nodev(fc, ramfs_fill_super);
+}
+
+static void ramfs_free_fc(struct fs_context *fc)
+{
+ kfree(fc->s_fs_info);
+}
+
+static const struct fs_context_operations ramfs_context_ops = {
+ .free = ramfs_free_fc,
+ .parse_param = ramfs_parse_param,
+ .get_tree = ramfs_get_tree,
+};
+
+int ramfs_init_fs_context(struct fs_context *fc)
+{
+ struct ramfs_fs_info *fsi;
+
+ fsi = kzalloc(sizeof(*fsi), GFP_KERNEL);
+ if (!fsi)
+ return -ENOMEM;
+
+ fsi->mount_opts.mode = RAMFS_DEFAULT_MODE;
+ fc->s_fs_info = fsi;
+ fc->ops = &ramfs_context_ops;
+ return 0;
}
static void ramfs_kill_sb(struct super_block *sb)
@@ -261,7 +277,8 @@ static void ramfs_kill_sb(struct super_block *sb)
static struct file_system_type ramfs_fs_type = {
.name = "ramfs",
- .mount = ramfs_mount,
+ .init_fs_context = ramfs_init_fs_context,
+ .parameters = &ramfs_fs_parameters,
.kill_sb = ramfs_kill_sb,
.fs_flags = FS_USERNS_MOUNT,
};