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zonefs: convert zonefs to use the new mount api
Convert the zonefs filesystem to use the new mount API. Tested using the zonefs test suite from: https://github.com/damien-lemoal/zonefs-tools Signed-off-by: Bill O'Donnell <bodonnel@redhat.com> Reviewed-by: Ian Kent <raven@themaw.net> Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
This commit is contained in:
Bill O'Donnell
Damien Le Moal
parent
841c351693
commit
567e629fd2
@ -15,12 +15,13 @@
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#include <linux/writeback.h>
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#include <linux/quotaops.h>
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#include <linux/seq_file.h>
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#include <linux/parser.h>
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#include <linux/uio.h>
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#include <linux/mman.h>
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#include <linux/sched/mm.h>
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#include <linux/crc32.h>
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#include <linux/task_io_accounting_ops.h>
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#include <linux/fs_parser.h>
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#include <linux/fs_context.h>
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#include "zonefs.h"
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@ -460,58 +461,47 @@ static int zonefs_statfs(struct dentry *dentry, struct kstatfs *buf)
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}
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enum {
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Opt_errors_ro, Opt_errors_zro, Opt_errors_zol, Opt_errors_repair,
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Opt_explicit_open, Opt_err,
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Opt_errors, Opt_explicit_open,
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};
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static const match_table_t tokens = {
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{ Opt_errors_ro, "errors=remount-ro"},
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{ Opt_errors_zro, "errors=zone-ro"},
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{ Opt_errors_zol, "errors=zone-offline"},
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{ Opt_errors_repair, "errors=repair"},
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{ Opt_explicit_open, "explicit-open" },
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{ Opt_err, NULL}
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struct zonefs_context {
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unsigned long s_mount_opts;
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};
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static int zonefs_parse_options(struct super_block *sb, char *options)
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static const struct constant_table zonefs_param_errors[] = {
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{"remount-ro", ZONEFS_MNTOPT_ERRORS_RO},
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{"zone-ro", ZONEFS_MNTOPT_ERRORS_ZRO},
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{"zone-offline", ZONEFS_MNTOPT_ERRORS_ZOL},
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{"repair", ZONEFS_MNTOPT_ERRORS_REPAIR},
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{}
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};
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static const struct fs_parameter_spec zonefs_param_spec[] = {
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fsparam_enum ("errors", Opt_errors, zonefs_param_errors),
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fsparam_flag ("explicit-open", Opt_explicit_open),
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{}
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};
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static int zonefs_parse_param(struct fs_context *fc, struct fs_parameter *param)
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{
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struct zonefs_sb_info *sbi = ZONEFS_SB(sb);
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substring_t args[MAX_OPT_ARGS];
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char *p;
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struct zonefs_context *ctx = fc->fs_private;
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struct fs_parse_result result;
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int opt;
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if (!options)
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return 0;
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opt = fs_parse(fc, zonefs_param_spec, param, &result);
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if (opt < 0)
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return opt;
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while ((p = strsep(&options, ",")) != NULL) {
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int token;
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if (!*p)
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continue;
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token = match_token(p, tokens, args);
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switch (token) {
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case Opt_errors_ro:
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sbi->s_mount_opts &= ~ZONEFS_MNTOPT_ERRORS_MASK;
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sbi->s_mount_opts |= ZONEFS_MNTOPT_ERRORS_RO;
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break;
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case Opt_errors_zro:
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sbi->s_mount_opts &= ~ZONEFS_MNTOPT_ERRORS_MASK;
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sbi->s_mount_opts |= ZONEFS_MNTOPT_ERRORS_ZRO;
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break;
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case Opt_errors_zol:
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sbi->s_mount_opts &= ~ZONEFS_MNTOPT_ERRORS_MASK;
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sbi->s_mount_opts |= ZONEFS_MNTOPT_ERRORS_ZOL;
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break;
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case Opt_errors_repair:
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sbi->s_mount_opts &= ~ZONEFS_MNTOPT_ERRORS_MASK;
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sbi->s_mount_opts |= ZONEFS_MNTOPT_ERRORS_REPAIR;
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break;
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case Opt_explicit_open:
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sbi->s_mount_opts |= ZONEFS_MNTOPT_EXPLICIT_OPEN;
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break;
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default:
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return -EINVAL;
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}
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switch (opt) {
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case Opt_errors:
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ctx->s_mount_opts &= ~ZONEFS_MNTOPT_ERRORS_MASK;
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ctx->s_mount_opts |= result.uint_32;
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break;
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case Opt_explicit_open:
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ctx->s_mount_opts |= ZONEFS_MNTOPT_EXPLICIT_OPEN;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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@ -533,13 +523,6 @@ static int zonefs_show_options(struct seq_file *seq, struct dentry *root)
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return 0;
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}
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static int zonefs_remount(struct super_block *sb, int *flags, char *data)
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{
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sync_filesystem(sb);
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return zonefs_parse_options(sb, data);
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}
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static int zonefs_inode_setattr(struct mnt_idmap *idmap,
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struct dentry *dentry, struct iattr *iattr)
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{
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@ -1195,7 +1178,6 @@ static const struct super_operations zonefs_sops = {
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.alloc_inode = zonefs_alloc_inode,
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.free_inode = zonefs_free_inode,
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.statfs = zonefs_statfs,
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.remount_fs = zonefs_remount,
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.show_options = zonefs_show_options,
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};
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@ -1240,9 +1222,10 @@ static void zonefs_release_zgroup_inodes(struct super_block *sb)
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* sub-directories and files according to the device zone configuration and
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* format options.
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*/
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static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
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static int zonefs_fill_super(struct super_block *sb, struct fs_context *fc)
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{
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struct zonefs_sb_info *sbi;
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struct zonefs_context *ctx = fc->fs_private;
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struct inode *inode;
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enum zonefs_ztype ztype;
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int ret;
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@ -1279,7 +1262,7 @@ static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
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sbi->s_uid = GLOBAL_ROOT_UID;
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sbi->s_gid = GLOBAL_ROOT_GID;
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sbi->s_perm = 0640;
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sbi->s_mount_opts = ZONEFS_MNTOPT_ERRORS_RO;
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sbi->s_mount_opts = ctx->s_mount_opts;
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atomic_set(&sbi->s_wro_seq_files, 0);
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sbi->s_max_wro_seq_files = bdev_max_open_zones(sb->s_bdev);
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@ -1290,10 +1273,6 @@ static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
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if (ret)
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return ret;
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ret = zonefs_parse_options(sb, data);
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if (ret)
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return ret;
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zonefs_info(sb, "Mounting %u zones", bdev_nr_zones(sb->s_bdev));
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if (!sbi->s_max_wro_seq_files &&
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@ -1354,12 +1333,6 @@ cleanup:
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return ret;
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}
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static struct dentry *zonefs_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *data)
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{
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return mount_bdev(fs_type, flags, dev_name, data, zonefs_fill_super);
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}
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static void zonefs_kill_super(struct super_block *sb)
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{
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struct zonefs_sb_info *sbi = ZONEFS_SB(sb);
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@ -1374,15 +1347,65 @@ static void zonefs_kill_super(struct super_block *sb)
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kfree(sbi);
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}
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static void zonefs_free_fc(struct fs_context *fc)
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{
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struct zonefs_context *ctx = fc->fs_private;
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kfree(ctx);
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}
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static int zonefs_get_tree(struct fs_context *fc)
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{
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return get_tree_bdev(fc, zonefs_fill_super);
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}
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static int zonefs_reconfigure(struct fs_context *fc)
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{
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struct zonefs_context *ctx = fc->fs_private;
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struct super_block *sb = fc->root->d_sb;
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struct zonefs_sb_info *sbi = sb->s_fs_info;
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sync_filesystem(fc->root->d_sb);
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/* Copy new options from ctx into sbi. */
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sbi->s_mount_opts = ctx->s_mount_opts;
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return 0;
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}
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static const struct fs_context_operations zonefs_context_ops = {
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.parse_param = zonefs_parse_param,
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.get_tree = zonefs_get_tree,
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.reconfigure = zonefs_reconfigure,
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.free = zonefs_free_fc,
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};
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/*
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* Set up the filesystem mount context.
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*/
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static int zonefs_init_fs_context(struct fs_context *fc)
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{
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struct zonefs_context *ctx;
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ctx = kzalloc(sizeof(struct zonefs_context), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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ctx->s_mount_opts = ZONEFS_MNTOPT_ERRORS_RO;
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fc->ops = &zonefs_context_ops;
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fc->fs_private = ctx;
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return 0;
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}
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/*
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* File system definition and registration.
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*/
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static struct file_system_type zonefs_type = {
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.owner = THIS_MODULE,
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.name = "zonefs",
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.mount = zonefs_mount,
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.kill_sb = zonefs_kill_super,
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.fs_flags = FS_REQUIRES_DEV,
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.owner = THIS_MODULE,
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.name = "zonefs",
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.kill_sb = zonefs_kill_super,
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.fs_flags = FS_REQUIRES_DEV,
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.init_fs_context = zonefs_init_fs_context,
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.parameters = zonefs_param_spec,
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};
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static int __init zonefs_init_inodecache(void)
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