The patch titled
Subject: nilfs2: refactor parser of snapshot mount option
has been added to the -mm tree. Its filename is
nilfs2-refactor-parser-of-snapshot-mount-option.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/nilfs2-refactor-parser-of-snapshot-mount-option.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/nilfs2-refactor-parser-of-snapshot-mount-option.patch
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------------------------------------------------------
From: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
Subject: nilfs2: refactor parser of snapshot mount option
Move parser of snapshot mount option to a separate function
nilfs_parse_snapshot_option(), replace simple_strtoull() with kstrtoull()
to avoid checkpatch.pl warning "WARNING: simple_strtoull is obsolete, use
kstrtoull instead", and refine the error message of the parser.
Link: http://lkml.kernel.org/r/1464875891-5443-9-git-send-email-konishi.ryusuke@xxxxxxxxxxxxx
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/nilfs2/super.c | 53 +++++++++++++++++++++++++++++---------------
1 file changed, 35 insertions(+), 18 deletions(-)
diff -puN fs/nilfs2/super.c~nilfs2-refactor-parser-of-snapshot-mount-option fs/nilfs2/super.c
--- a/fs/nilfs2/super.c~nilfs2-refactor-parser-of-snapshot-mount-option
+++ a/fs/nilfs2/super.c
@@ -1205,6 +1205,38 @@ struct nilfs_super_data {
int flags;
};
+static int nilfs_parse_snapshot_option(const char *option,
+ const substring_t *arg,
+ struct nilfs_super_data *sd)
+{
+ unsigned long long val;
+ const char *msg = NULL;
+ int err;
+
+ if (!(sd->flags & MS_RDONLY)) {
+ msg = "read-only option is not specified";
+ goto parse_error;
+ }
+
+ err = kstrtoull(arg->from, 0, &val);
+ if (err) {
+ if (err == -ERANGE)
+ msg = "too large checkpoint number";
+ else
+ msg = "malformed argument";
+ goto parse_error;
+ } else if (val == 0) {
+ msg = "invalid checkpoint number 0";
+ goto parse_error;
+ }
+ sd->cno = val;
+ return 0;
+
+parse_error:
+ nilfs_msg(NULL, KERN_ERR, "invalid option \"%s\": %s", option, msg);
+ return 1;
+}
+
/**
* nilfs_identify - pre-read mount options needed to identify mount instance
* @data: mount options
@@ -1221,24 +1253,9 @@ static int nilfs_identify(char *data, st
p = strsep(&options, ",");
if (p != NULL && *p) {
token = match_token(p, tokens, args);
- if (token == Opt_snapshot) {
- if (!(sd->flags & MS_RDONLY)) {
- ret++;
- } else {
- sd->cno = simple_strtoull(args[0].from,
- NULL, 0);
- /*
- * No need to see the end pointer;
- * match_token() has done syntax
- * checking.
- */
- if (sd->cno == 0)
- ret++;
- }
- }
- if (ret)
- nilfs_msg(NULL, KERN_ERR,
- "invalid mount option: %s", p);
+ if (token == Opt_snapshot)
+ ret = nilfs_parse_snapshot_option(p, &args[0],
+ sd);
}
if (!options)
break;
_
Patches currently in -mm which might be from konishi.ryusuke@xxxxxxxxxxxxx are
nilfs2-hide-function-name-argument-from-nilfs_error.patch
nilfs2-add-nilfs_msg-message-interface.patch
nilfs2-embed-a-back-pointer-to-super-block-instance-in-nilfs-object.patch
nilfs2-reduce-bare-use-of-printk-with-nilfs_msg.patch
nilfs2-replace-nilfs_warning-with-nilfs_msg.patch
nilfs2-emit-error-message-when-i-o-error-is-detected.patch
nilfs2-do-not-use-yield.patch
nilfs2-refactor-parser-of-snapshot-mount-option.patch
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