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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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jfs: convert jfs to use the new mount api
Convert the jfs 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@redhat.com> Link: https://lore.kernel.org/r/20240926171947.682881-1-sandeen@redhat.com Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Eric Sandeen
Christian Brauner
parent
5b00a0f96d
commit
945be8ca81
@ -24,6 +24,7 @@
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#define JFS_ERR_REMOUNT_RO 0x00000002 /* remount read-only */
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#define JFS_ERR_CONTINUE 0x00000004 /* continue */
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#define JFS_ERR_PANIC 0x00000008 /* panic */
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#define JFS_ERR_MASK (JFS_ERR_REMOUNT_RO|JFS_ERR_CONTINUE|JFS_ERR_PANIC)
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/* Quota support */
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#define JFS_USRQUOTA 0x00000010
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465
fs/jfs/super.c
465
fs/jfs/super.c
@ -6,11 +6,11 @@
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/parser.h>
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#include <linux/completion.h>
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#include <linux/vfs.h>
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#include <linux/quotaops.h>
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#include <linux/mount.h>
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#include <linux/fs_context.h>
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#include <linux/fs_parser.h>
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#include <linux/moduleparam.h>
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#include <linux/kthread.h>
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#include <linux/posix_acl.h>
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@ -210,240 +210,195 @@ enum {
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Opt_discard, Opt_nodiscard, Opt_discard_minblk
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};
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static const match_table_t tokens = {
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{Opt_integrity, "integrity"},
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{Opt_nointegrity, "nointegrity"},
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{Opt_iocharset, "iocharset=%s"},
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{Opt_resize, "resize=%u"},
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{Opt_resize_nosize, "resize"},
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{Opt_errors, "errors=%s"},
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{Opt_ignore, "noquota"},
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{Opt_quota, "quota"},
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{Opt_usrquota, "usrquota"},
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{Opt_grpquota, "grpquota"},
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{Opt_uid, "uid=%u"},
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{Opt_gid, "gid=%u"},
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{Opt_umask, "umask=%u"},
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{Opt_discard, "discard"},
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{Opt_nodiscard, "nodiscard"},
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{Opt_discard_minblk, "discard=%u"},
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{Opt_err, NULL}
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static const struct constant_table jfs_param_errors[] = {
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{"continue", JFS_ERR_CONTINUE},
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{"remount-ro", JFS_ERR_REMOUNT_RO},
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{"panic", JFS_ERR_PANIC},
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{}
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};
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static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
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int *flag)
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static const struct fs_parameter_spec jfs_param_spec[] = {
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fsparam_flag_no ("integrity", Opt_integrity),
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fsparam_string ("iocharset", Opt_iocharset),
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fsparam_u64 ("resize", Opt_resize),
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fsparam_flag ("resize", Opt_resize_nosize),
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fsparam_enum ("errors", Opt_errors, jfs_param_errors),
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fsparam_flag ("quota", Opt_quota),
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fsparam_flag ("noquota", Opt_ignore),
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fsparam_flag ("usrquota", Opt_usrquota),
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fsparam_flag ("grpquota", Opt_grpquota),
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fsparam_uid ("uid", Opt_uid),
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fsparam_gid ("gid", Opt_gid),
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fsparam_u32oct ("umask", Opt_umask),
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fsparam_flag ("discard", Opt_discard),
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fsparam_u32 ("discard", Opt_discard_minblk),
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fsparam_flag ("nodiscard", Opt_nodiscard),
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{}
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};
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struct jfs_context {
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int flag;
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kuid_t uid;
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kgid_t gid;
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uint umask;
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uint minblks_trim;
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void *nls_map;
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bool resize;
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s64 newLVSize;
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};
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static int jfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
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{
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void *nls_map = (void *)-1; /* -1: no change; NULL: none */
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char *p;
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struct jfs_sb_info *sbi = JFS_SBI(sb);
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struct jfs_context *ctx = fc->fs_private;
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int reconfigure = (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE);
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struct fs_parse_result result;
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struct nls_table *nls_map;
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int opt;
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*newLVSize = 0;
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opt = fs_parse(fc, jfs_param_spec, param, &result);
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if (opt < 0)
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return opt;
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if (!options)
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return 1;
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while ((p = strsep(&options, ",")) != NULL) {
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substring_t args[MAX_OPT_ARGS];
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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_integrity:
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*flag &= ~JFS_NOINTEGRITY;
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break;
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case Opt_nointegrity:
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*flag |= JFS_NOINTEGRITY;
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break;
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case Opt_ignore:
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/* Silently ignore the quota options */
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/* Don't do anything ;-) */
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break;
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case Opt_iocharset:
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if (nls_map && nls_map != (void *) -1)
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unload_nls(nls_map);
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if (!strcmp(args[0].from, "none"))
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nls_map = NULL;
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else {
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nls_map = load_nls(args[0].from);
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if (!nls_map) {
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pr_err("JFS: charset not found\n");
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goto cleanup;
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}
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switch (opt) {
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case Opt_integrity:
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if (result.negated)
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ctx->flag |= JFS_NOINTEGRITY;
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else
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ctx->flag &= ~JFS_NOINTEGRITY;
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break;
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case Opt_ignore:
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/* Silently ignore the quota options */
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/* Don't do anything ;-) */
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break;
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case Opt_iocharset:
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if (ctx->nls_map && ctx->nls_map != (void *) -1) {
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unload_nls(ctx->nls_map);
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ctx->nls_map = NULL;
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}
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if (!strcmp(param->string, "none"))
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ctx->nls_map = NULL;
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else {
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nls_map = load_nls(param->string);
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if (!nls_map) {
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pr_err("JFS: charset not found\n");
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return -EINVAL;
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}
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break;
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case Opt_resize:
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{
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char *resize = args[0].from;
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int rc = kstrtoll(resize, 0, newLVSize);
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if (rc)
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goto cleanup;
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break;
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}
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case Opt_resize_nosize:
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{
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*newLVSize = sb_bdev_nr_blocks(sb);
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if (*newLVSize == 0)
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pr_err("JFS: Cannot determine volume size\n");
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break;
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}
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case Opt_errors:
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{
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char *errors = args[0].from;
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if (!errors || !*errors)
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goto cleanup;
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if (!strcmp(errors, "continue")) {
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*flag &= ~JFS_ERR_REMOUNT_RO;
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*flag &= ~JFS_ERR_PANIC;
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*flag |= JFS_ERR_CONTINUE;
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} else if (!strcmp(errors, "remount-ro")) {
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*flag &= ~JFS_ERR_CONTINUE;
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*flag &= ~JFS_ERR_PANIC;
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*flag |= JFS_ERR_REMOUNT_RO;
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} else if (!strcmp(errors, "panic")) {
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*flag &= ~JFS_ERR_CONTINUE;
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*flag &= ~JFS_ERR_REMOUNT_RO;
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*flag |= JFS_ERR_PANIC;
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} else {
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pr_err("JFS: %s is an invalid error handler\n",
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errors);
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goto cleanup;
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}
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break;
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ctx->nls_map = nls_map;
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}
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break;
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case Opt_resize:
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if (!reconfigure)
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return -EINVAL;
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ctx->resize = true;
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ctx->newLVSize = result.uint_64;
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break;
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case Opt_resize_nosize:
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if (!reconfigure)
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return -EINVAL;
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ctx->resize = true;
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break;
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case Opt_errors:
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ctx->flag &= ~JFS_ERR_MASK;
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ctx->flag |= result.uint_32;
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break;
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#ifdef CONFIG_QUOTA
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case Opt_quota:
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case Opt_usrquota:
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*flag |= JFS_USRQUOTA;
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break;
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case Opt_grpquota:
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*flag |= JFS_GRPQUOTA;
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break;
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case Opt_quota:
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case Opt_usrquota:
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ctx->flag |= JFS_USRQUOTA;
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break;
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case Opt_grpquota:
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ctx->flag |= JFS_GRPQUOTA;
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break;
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#else
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case Opt_usrquota:
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case Opt_grpquota:
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case Opt_quota:
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pr_err("JFS: quota operations not supported\n");
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break;
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case Opt_usrquota:
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case Opt_grpquota:
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case Opt_quota:
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pr_err("JFS: quota operations not supported\n");
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break;
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#endif
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case Opt_uid:
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{
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char *uid = args[0].from;
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uid_t val;
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int rc = kstrtouint(uid, 0, &val);
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case Opt_uid:
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ctx->uid = result.uid;
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break;
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if (rc)
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goto cleanup;
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sbi->uid = make_kuid(current_user_ns(), val);
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if (!uid_valid(sbi->uid))
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goto cleanup;
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break;
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case Opt_gid:
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ctx->gid = result.gid;
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break;
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case Opt_umask:
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if (result.uint_32 & ~0777) {
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pr_err("JFS: Invalid value of umask\n");
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return -EINVAL;
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}
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ctx->umask = result.uint_32;
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break;
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case Opt_gid:
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{
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char *gid = args[0].from;
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gid_t val;
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int rc = kstrtouint(gid, 0, &val);
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case Opt_discard:
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/* if set to 1, even copying files will cause
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* trimming :O
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* -> user has more control over the online trimming
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*/
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ctx->minblks_trim = 64;
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ctx->flag |= JFS_DISCARD;
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break;
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if (rc)
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goto cleanup;
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sbi->gid = make_kgid(current_user_ns(), val);
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if (!gid_valid(sbi->gid))
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goto cleanup;
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break;
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}
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case Opt_nodiscard:
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ctx->flag &= ~JFS_DISCARD;
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break;
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case Opt_umask:
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{
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char *umask = args[0].from;
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int rc = kstrtouint(umask, 8, &sbi->umask);
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case Opt_discard_minblk:
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ctx->minblks_trim = result.uint_32;
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ctx->flag |= JFS_DISCARD;
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break;
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if (rc)
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goto cleanup;
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if (sbi->umask & ~0777) {
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pr_err("JFS: Invalid value of umask\n");
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goto cleanup;
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}
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break;
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}
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case Opt_discard:
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/* if set to 1, even copying files will cause
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* trimming :O
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* -> user has more control over the online trimming
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*/
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sbi->minblks_trim = 64;
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if (bdev_max_discard_sectors(sb->s_bdev))
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*flag |= JFS_DISCARD;
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else
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pr_err("JFS: discard option not supported on device\n");
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break;
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case Opt_nodiscard:
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*flag &= ~JFS_DISCARD;
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break;
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case Opt_discard_minblk:
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{
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char *minblks_trim = args[0].from;
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int rc;
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if (bdev_max_discard_sectors(sb->s_bdev)) {
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*flag |= JFS_DISCARD;
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rc = kstrtouint(minblks_trim, 0,
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&sbi->minblks_trim);
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if (rc)
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goto cleanup;
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} else
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pr_err("JFS: discard option not supported on device\n");
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break;
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}
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default:
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printk("jfs: Unrecognized mount option \"%s\" or missing value\n",
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p);
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goto cleanup;
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}
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default:
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return -EINVAL;
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}
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if (nls_map != (void *) -1) {
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/* Discard old (if remount) */
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unload_nls(sbi->nls_tab);
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sbi->nls_tab = nls_map;
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}
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return 1;
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cleanup:
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if (nls_map && nls_map != (void *) -1)
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unload_nls(nls_map);
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return 0;
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}
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static int jfs_remount(struct super_block *sb, int *flags, char *data)
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static int jfs_reconfigure(struct fs_context *fc)
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{
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s64 newLVSize = 0;
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struct jfs_context *ctx = fc->fs_private;
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struct super_block *sb = fc->root->d_sb;
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int readonly = fc->sb_flags & SB_RDONLY;
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int rc = 0;
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int flag = JFS_SBI(sb)->flag;
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int flag = ctx->flag;
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int ret;
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sync_filesystem(sb);
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if (!parse_options(data, sb, &newLVSize, &flag))
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return -EINVAL;
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if (newLVSize) {
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/* Transfer results of parsing to the sbi */
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JFS_SBI(sb)->flag = ctx->flag;
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JFS_SBI(sb)->uid = ctx->uid;
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JFS_SBI(sb)->gid = ctx->gid;
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JFS_SBI(sb)->umask = ctx->umask;
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JFS_SBI(sb)->minblks_trim = ctx->minblks_trim;
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if (ctx->nls_map != (void *) -1) {
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unload_nls(JFS_SBI(sb)->nls_tab);
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JFS_SBI(sb)->nls_tab = ctx->nls_map;
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}
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ctx->nls_map = NULL;
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if (ctx->resize) {
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if (sb_rdonly(sb)) {
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pr_err("JFS: resize requires volume to be mounted read-write\n");
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return -EROFS;
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}
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rc = jfs_extendfs(sb, newLVSize, 0);
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if (!ctx->newLVSize) {
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ctx->newLVSize = sb_bdev_nr_blocks(sb);
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if (ctx->newLVSize == 0)
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pr_err("JFS: Cannot determine volume size\n");
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}
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rc = jfs_extendfs(sb, ctx->newLVSize, 0);
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if (rc)
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return rc;
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}
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if (sb_rdonly(sb) && !(*flags & SB_RDONLY)) {
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if (sb_rdonly(sb) && !readonly) {
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/*
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* Invalidate any previously read metadata. fsck may have
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* changed the on-disk data since we mounted r/o
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@ -459,7 +414,7 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
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dquot_resume(sb, -1);
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return ret;
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}
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if (!sb_rdonly(sb) && (*flags & SB_RDONLY)) {
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if (!sb_rdonly(sb) && readonly) {
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rc = dquot_suspend(sb, -1);
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if (rc < 0)
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return rc;
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@ -467,7 +422,7 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
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JFS_SBI(sb)->flag = flag;
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return rc;
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}
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if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
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if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) {
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if (!sb_rdonly(sb)) {
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rc = jfs_umount_rw(sb);
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if (rc)
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@ -477,18 +432,20 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
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ret = jfs_mount_rw(sb, 1);
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return ret;
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}
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}
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JFS_SBI(sb)->flag = flag;
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return 0;
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}
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static int jfs_fill_super(struct super_block *sb, void *data, int silent)
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static int jfs_fill_super(struct super_block *sb, struct fs_context *fc)
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{
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struct jfs_context *ctx = fc->fs_private;
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int silent = fc->sb_flags & SB_SILENT;
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struct jfs_sb_info *sbi;
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struct inode *inode;
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int rc;
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s64 newLVSize = 0;
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int flag, ret = -EINVAL;
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int ret = -EINVAL;
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jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
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@ -501,24 +458,34 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
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sb->s_time_min = 0;
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sb->s_time_max = U32_MAX;
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sbi->sb = sb;
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sbi->uid = INVALID_UID;
|
||||
sbi->gid = INVALID_GID;
|
||||
sbi->umask = -1;
|
||||
|
||||
/* initialize the mount flag and determine the default error handler */
|
||||
flag = JFS_ERR_REMOUNT_RO;
|
||||
/* Transfer results of parsing to the sbi */
|
||||
sbi->flag = ctx->flag;
|
||||
sbi->uid = ctx->uid;
|
||||
sbi->gid = ctx->gid;
|
||||
sbi->umask = ctx->umask;
|
||||
if (ctx->nls_map != (void *) -1) {
|
||||
unload_nls(sbi->nls_tab);
|
||||
sbi->nls_tab = ctx->nls_map;
|
||||
}
|
||||
ctx->nls_map = NULL;
|
||||
|
||||
if (!parse_options((char *) data, sb, &newLVSize, &flag))
|
||||
goto out_kfree;
|
||||
sbi->flag = flag;
|
||||
if (sbi->flag & JFS_DISCARD) {
|
||||
if (!bdev_max_discard_sectors(sb->s_bdev)) {
|
||||
pr_err("JFS: discard option not supported on device\n");
|
||||
sbi->flag &= ~JFS_DISCARD;
|
||||
} else {
|
||||
sbi->minblks_trim = ctx->minblks_trim;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_JFS_POSIX_ACL
|
||||
sb->s_flags |= SB_POSIXACL;
|
||||
#endif
|
||||
|
||||
if (newLVSize) {
|
||||
if (ctx->resize) {
|
||||
pr_err("resize option for remount only\n");
|
||||
goto out_kfree;
|
||||
goto out_unload;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -608,7 +575,6 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
|
||||
sbi->direct_inode = NULL;
|
||||
out_unload:
|
||||
unload_nls(sbi->nls_tab);
|
||||
out_kfree:
|
||||
kfree(sbi);
|
||||
return ret;
|
||||
}
|
||||
@ -664,10 +630,9 @@ static int jfs_unfreeze(struct super_block *sb)
|
||||
return rc;
|
||||
}
|
||||
|
||||
static struct dentry *jfs_do_mount(struct file_system_type *fs_type,
|
||||
int flags, const char *dev_name, void *data)
|
||||
static int jfs_get_tree(struct fs_context *fc)
|
||||
{
|
||||
return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
|
||||
return get_tree_bdev(fc, jfs_fill_super);
|
||||
}
|
||||
|
||||
static int jfs_sync_fs(struct super_block *sb, int wait)
|
||||
@ -886,7 +851,6 @@ static const struct super_operations jfs_super_operations = {
|
||||
.freeze_fs = jfs_freeze,
|
||||
.unfreeze_fs = jfs_unfreeze,
|
||||
.statfs = jfs_statfs,
|
||||
.remount_fs = jfs_remount,
|
||||
.show_options = jfs_show_options,
|
||||
#ifdef CONFIG_QUOTA
|
||||
.quota_read = jfs_quota_read,
|
||||
@ -902,12 +866,71 @@ static const struct export_operations jfs_export_operations = {
|
||||
.get_parent = jfs_get_parent,
|
||||
};
|
||||
|
||||
static void jfs_init_options(struct fs_context *fc, struct jfs_context *ctx)
|
||||
{
|
||||
if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
|
||||
struct super_block *sb = fc->root->d_sb;
|
||||
|
||||
/* Copy over current option values and mount flags */
|
||||
ctx->uid = JFS_SBI(sb)->uid;
|
||||
ctx->gid = JFS_SBI(sb)->gid;
|
||||
ctx->umask = JFS_SBI(sb)->umask;
|
||||
ctx->nls_map = (void *)-1;
|
||||
ctx->minblks_trim = JFS_SBI(sb)->minblks_trim;
|
||||
ctx->flag = JFS_SBI(sb)->flag;
|
||||
|
||||
} else {
|
||||
/*
|
||||
* Initialize the mount flag and determine the default
|
||||
* error handler
|
||||
*/
|
||||
ctx->flag = JFS_ERR_REMOUNT_RO;
|
||||
ctx->uid = INVALID_UID;
|
||||
ctx->gid = INVALID_GID;
|
||||
ctx->umask = -1;
|
||||
ctx->nls_map = (void *)-1;
|
||||
}
|
||||
}
|
||||
|
||||
static void jfs_free_fc(struct fs_context *fc)
|
||||
{
|
||||
struct jfs_context *ctx = fc->fs_private;
|
||||
|
||||
if (ctx->nls_map != (void *) -1)
|
||||
unload_nls(ctx->nls_map);
|
||||
kfree(ctx);
|
||||
}
|
||||
|
||||
static const struct fs_context_operations jfs_context_ops = {
|
||||
.parse_param = jfs_parse_param,
|
||||
.get_tree = jfs_get_tree,
|
||||
.reconfigure = jfs_reconfigure,
|
||||
.free = jfs_free_fc,
|
||||
};
|
||||
|
||||
static int jfs_init_fs_context(struct fs_context *fc)
|
||||
{
|
||||
struct jfs_context *ctx;
|
||||
|
||||
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
|
||||
if (!ctx)
|
||||
return -ENOMEM;
|
||||
|
||||
jfs_init_options(fc, ctx);
|
||||
|
||||
fc->fs_private = ctx;
|
||||
fc->ops = &jfs_context_ops;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct file_system_type jfs_fs_type = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "jfs",
|
||||
.mount = jfs_do_mount,
|
||||
.kill_sb = kill_block_super,
|
||||
.fs_flags = FS_REQUIRES_DEV,
|
||||
.init_fs_context = jfs_init_fs_context,
|
||||
.parameters = jfs_param_spec,
|
||||
};
|
||||
MODULE_ALIAS_FS("jfs");
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user