From c05dbfc2609993ccc067879579e2a7726e12b3f1 Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Thu, 16 Sep 2010 00:36:24 +0900 Subject: [PATCH] nilfs2: accept 64-bit checkpoint numbers in cp mount option The current implementation doesn't mount snapshots with checkpoint numbers larger than INT_MAX since it uses match_int() for parsing "cp=" mount option. This uses simple_strtoull() for the conversion to resolve the issue. Signed-off-by: Ryusuke Konishi --- fs/nilfs2/super.c | 25 ++++++++++++------------- 1 file changed, 12 insertions(+), 13 deletions(-) diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index d92ebd5d60d9..a1cd444103ff 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -556,7 +556,6 @@ static int parse_options(char *options, struct super_block *sb, int is_remount) struct nilfs_sb_info *sbi = NILFS_SB(sb); char *p; substring_t args[MAX_OPT_ARGS]; - int option; if (!options) return 1; @@ -594,8 +593,6 @@ static int parse_options(char *options, struct super_block *sb, int is_remount) nilfs_write_opt(sbi, ERROR_MODE, ERRORS_CONT); break; case Opt_snapshot: - if (match_int(&args[0], &option) || option <= 0) - return 0; if (is_remount) { printk(KERN_ERR "NILFS: \"%s\" option is invalid " @@ -1065,7 +1062,7 @@ static int nilfs_identify(char *data, struct nilfs_super_data *sd) { char *p, *options = data; substring_t args[MAX_OPT_ARGS]; - int option, token; + int token; int ret = 0; do { @@ -1073,16 +1070,18 @@ static int nilfs_identify(char *data, struct nilfs_super_data *sd) if (p != NULL && *p) { token = match_token(p, tokens, args); if (token == Opt_snapshot) { - if (!(sd->flags & MS_RDONLY)) + if (!(sd->flags & MS_RDONLY)) { ret++; - else { - ret = match_int(&args[0], &option); - if (!ret) { - if (option > 0) - sd->cno = option; - else - 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) -- 2.34.1