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Add scoutfs_fmt_vers_unsupported()

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Add a little inline helper to test whether the mounted format version
supports a feature or not, returning an errno that callers can use when
they can return a shared expected error.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2024-06-27 13:53:53 -07:00
parent 9ba4271c26
commit 361491846d
1 changed files with 13 additions and 0 deletions
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13
kmod/src/super.h
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@@ -156,4 +156,17 @@ int scoutfs_write_super(struct super_block *sb,
/* to keep this out of the ioctl.h public interface definition */
long scoutfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
/*
* Returns 0 when supported, non-zero -errno when unsupported.
*/
static inline int scoutfs_fmt_vers_unsupported(struct super_block *sb, u64 vers)
{
struct scoutfs_sb_info *sbi = SCOUTFS_SB(sb);
if (sbi && (sbi->fmt_vers < vers))
return -EOPNOTSUPP;
else
return 0;
}
#endif