diff options
| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2016-08-02 14:05:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-02 19:35:20 -0400 |
| commit | a7d3f104da57eecb2b9881127d6bdf9abe7fde99 (patch) | |
| tree | 58ff399301e8241f7262b78b8283917f9a445bfe /fs/nilfs2 | |
| parent | aceb4170bb2ba88c5327cc69b9c91a708c7f7046 (diff) | |
| download | lwn-a7d3f104da57eecb2b9881127d6bdf9abe7fde99.tar.gz lwn-a7d3f104da57eecb2b9881127d6bdf9abe7fde99.zip | |
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kstrtoull() to avoid checkpatch.pl warning "WARNING: simple_strtoull is
obsolete, use kstrtoull instead", and refine the error message of the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@lab.ntt.co.jp
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2')
| -rw-r--r-- | fs/nilfs2/super.c | 53 |
1 files changed, 35 insertions, 18 deletions
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 33ba6f78de69..c95d369e90aa 100644 --- a/fs/nilfs2/super.c +++ b/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, struct nilfs_super_data *sd) 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; |