#include <linux/writeback.h>
#include <linux/quotaops.h>
#include <linux/seq_file.h>
-#include <linux/parser.h>
#include <linux/uio.h>
#include <linux/mman.h>
#include <linux/sched/mm.h>
#include <linux/crc32.h>
#include <linux/task_io_accounting_ops.h>
+#include <linux/fs_parser.h>
+#include <linux/fs_context.h>
#include "zonefs.h"
}
enum {
- Opt_errors_ro, Opt_errors_zro, Opt_errors_zol, Opt_errors_repair,
- Opt_explicit_open, Opt_err,
+ Opt_errors, Opt_explicit_open,
};
-static const match_table_t tokens = {
- { Opt_errors_ro, "errors=remount-ro"},
- { Opt_errors_zro, "errors=zone-ro"},
- { Opt_errors_zol, "errors=zone-offline"},
- { Opt_errors_repair, "errors=repair"},
- { Opt_explicit_open, "explicit-open" },
- { Opt_err, NULL}
+struct zonefs_context {
+ unsigned long s_mount_opts;
};
-static int zonefs_parse_options(struct super_block *sb, char *options)
-{
- struct zonefs_sb_info *sbi = ZONEFS_SB(sb);
- substring_t args[MAX_OPT_ARGS];
- char *p;
-
- if (!options)
- return 0;
-
- while ((p = strsep(&options, ",")) != NULL) {
- int token;
+static const struct constant_table zonefs_param_errors[] = {
+ {"remount-ro", ZONEFS_MNTOPT_ERRORS_RO},
+ {"zone-ro", ZONEFS_MNTOPT_ERRORS_ZRO},
+ {"zone-offline", ZONEFS_MNTOPT_ERRORS_ZOL},
+ {"repair", ZONEFS_MNTOPT_ERRORS_REPAIR},
+ {}
+};
- if (!*p)
- continue;
+static const struct fs_parameter_spec zonefs_param_spec[] = {
+ fsparam_enum ("errors", Opt_errors, zonefs_param_errors),
+ fsparam_flag ("explicit-open", Opt_explicit_open),
+ {}
+};
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_errors_ro:
- sbi->s_mount_opts &= ~ZONEFS_MNTOPT_ERRORS_MASK;
- sbi->s_mount_opts |= ZONEFS_MNTOPT_ERRORS_RO;
- break;
- case Opt_errors_zro:
- sbi->s_mount_opts &= ~ZONEFS_MNTOPT_ERRORS_MASK;
- sbi->s_mount_opts |= ZONEFS_MNTOPT_ERRORS_ZRO;
- break;
- case Opt_errors_zol:
- sbi->s_mount_opts &= ~ZONEFS_MNTOPT_ERRORS_MASK;
- sbi->s_mount_opts |= ZONEFS_MNTOPT_ERRORS_ZOL;
- break;
- case Opt_errors_repair:
- sbi->s_mount_opts &= ~ZONEFS_MNTOPT_ERRORS_MASK;
- sbi->s_mount_opts |= ZONEFS_MNTOPT_ERRORS_REPAIR;
- break;
- case Opt_explicit_open:
- sbi->s_mount_opts |= ZONEFS_MNTOPT_EXPLICIT_OPEN;
- break;
- default:
- return -EINVAL;
- }
+static int zonefs_parse_param(struct fs_context *fc, struct fs_parameter *param)
+{
+ struct zonefs_context *ctx = fc->fs_private;
+ struct fs_parse_result result;
+ int opt;
+
+ opt = fs_parse(fc, zonefs_param_spec, param, &result);
+ if (opt < 0)
+ return opt;
+
+ switch (opt) {
+ case Opt_errors:
+ ctx->s_mount_opts &= ~ZONEFS_MNTOPT_ERRORS_MASK;
+ ctx->s_mount_opts |= result.uint_32;
+ break;
+ case Opt_explicit_open:
+ ctx->s_mount_opts |= ZONEFS_MNTOPT_EXPLICIT_OPEN;
+ break;
+ default:
+ return -EINVAL;
}
return 0;
return 0;
}
-static int zonefs_remount(struct super_block *sb, int *flags, char *data)
-{
- sync_filesystem(sb);
-
- return zonefs_parse_options(sb, data);
-}
-
static int zonefs_inode_setattr(struct mnt_idmap *idmap,
struct dentry *dentry, struct iattr *iattr)
{
.alloc_inode = zonefs_alloc_inode,
.free_inode = zonefs_free_inode,
.statfs = zonefs_statfs,
- .remount_fs = zonefs_remount,
.show_options = zonefs_show_options,
};
* sub-directories and files according to the device zone configuration and
* format options.
*/
-static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
+static int zonefs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct zonefs_sb_info *sbi;
+ struct zonefs_context *ctx = fc->fs_private;
struct inode *inode;
enum zonefs_ztype ztype;
int ret;
sbi->s_uid = GLOBAL_ROOT_UID;
sbi->s_gid = GLOBAL_ROOT_GID;
sbi->s_perm = 0640;
- sbi->s_mount_opts = ZONEFS_MNTOPT_ERRORS_RO;
+ sbi->s_mount_opts = ctx->s_mount_opts;
atomic_set(&sbi->s_wro_seq_files, 0);
sbi->s_max_wro_seq_files = bdev_max_open_zones(sb->s_bdev);
if (ret)
return ret;
- ret = zonefs_parse_options(sb, data);
- if (ret)
- return ret;
-
zonefs_info(sb, "Mounting %u zones", bdev_nr_zones(sb->s_bdev));
if (!sbi->s_max_wro_seq_files &&
return ret;
}
-static struct dentry *zonefs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
-{
- return mount_bdev(fs_type, flags, dev_name, data, zonefs_fill_super);
-}
-
static void zonefs_kill_super(struct super_block *sb)
{
struct zonefs_sb_info *sbi = ZONEFS_SB(sb);
kfree(sbi);
}
+static void zonefs_free_fc(struct fs_context *fc)
+{
+ struct zonefs_context *ctx = fc->fs_private;
+
+ kfree(ctx);
+}
+
+static int zonefs_get_tree(struct fs_context *fc)
+{
+ return get_tree_bdev(fc, zonefs_fill_super);
+}
+
+static int zonefs_reconfigure(struct fs_context *fc)
+{
+ struct zonefs_context *ctx = fc->fs_private;
+ struct super_block *sb = fc->root->d_sb;
+ struct zonefs_sb_info *sbi = sb->s_fs_info;
+
+ sync_filesystem(fc->root->d_sb);
+ /* Copy new options from ctx into sbi. */
+ sbi->s_mount_opts = ctx->s_mount_opts;
+
+ return 0;
+}
+
+static const struct fs_context_operations zonefs_context_ops = {
+ .parse_param = zonefs_parse_param,
+ .get_tree = zonefs_get_tree,
+ .reconfigure = zonefs_reconfigure,
+ .free = zonefs_free_fc,
+};
+
+/*
+ * Set up the filesystem mount context.
+ */
+static int zonefs_init_fs_context(struct fs_context *fc)
+{
+ struct zonefs_context *ctx;
+
+ ctx = kzalloc(sizeof(struct zonefs_context), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->s_mount_opts = ZONEFS_MNTOPT_ERRORS_RO;
+ fc->ops = &zonefs_context_ops;
+ fc->fs_private = ctx;
+
+ return 0;
+}
+
/*
* File system definition and registration.
*/
static struct file_system_type zonefs_type = {
- .owner = THIS_MODULE,
- .name = "zonefs",
- .mount = zonefs_mount,
- .kill_sb = zonefs_kill_super,
- .fs_flags = FS_REQUIRES_DEV,
+ .owner = THIS_MODULE,
+ .name = "zonefs",
+ .kill_sb = zonefs_kill_super,
+ .fs_flags = FS_REQUIRES_DEV,
+ .init_fs_context = zonefs_init_fs_context,
+ .parameters = zonefs_param_spec,
};
static int __init zonefs_init_inodecache(void)
git.samba.org / sfrench / cifs-2.6.git / blobdiff