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author | Anand Jain <anand.jain@oracle.com> | 2020-10-28 16:14:45 +0300 |
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committer | David Sterba <dsterba@suse.com> | 2020-12-08 17:53:44 +0300 |
commit | aaefed207875a0f0c46c4a50dcd0aca0d56b9062 (patch) | |
tree | 3f6e648d49ffb30d6a4d275653c18113c28e10fe /fs/btrfs/sysfs.c | |
parent | 88090ad36a64af1eb5b78d26b2ccd07eedae80b5 (diff) | |
download | linux-aaefed207875a0f0c46c4a50dcd0aca0d56b9062.tar.xz |
btrfs: add helper for string match ignoring leading/trailing whitespace
Add a generic helper to match the string in a given buffer, and ignore
the leading and trailing whitespace.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ rename variables, add comments ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/sysfs.c')
-rw-r--r-- | fs/btrfs/sysfs.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index fcd6c7a9bbd1..b2f653eb46cb 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -888,6 +888,25 @@ static ssize_t btrfs_generation_show(struct kobject *kobj, } BTRFS_ATTR(, generation, btrfs_generation_show); +/* + * Look for an exact string @string in @buffer with possible leading or + * trailing whitespace + */ +static bool strmatch(const char *buffer, const char *string) +{ + const size_t len = strlen(string); + + /* Skip leading whitespace */ + buffer = skip_spaces(buffer); + + /* Match entire string, check if the rest is whitespace or empty */ + if (strncmp(string, buffer, len) == 0 && + strlen(skip_spaces(buffer + len)) == 0) + return true; + + return false; +} + static const struct attribute *btrfs_attrs[] = { BTRFS_ATTR_PTR(, label), BTRFS_ATTR_PTR(, nodesize), |