3b02a68a63
Now that we have the feature name strings available in the kernel via the sysfs attributes, we can use them for printing better failure messages from the ioctl path. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
#ifndef _BTRFS_SYSFS_H_
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#define _BTRFS_SYSFS_H_
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enum btrfs_feature_set {
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FEAT_COMPAT,
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FEAT_COMPAT_RO,
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FEAT_INCOMPAT,
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FEAT_MAX
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};
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#define __INIT_KOBJ_ATTR(_name, _mode, _show, _store) \
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{ \
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.attr = { .name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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}
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#define BTRFS_ATTR_RW(_name, _mode, _show, _store) \
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static struct kobj_attribute btrfs_attr_##_name = \
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__INIT_KOBJ_ATTR(_name, _mode, _show, _store)
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#define BTRFS_ATTR(_name, _mode, _show) \
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BTRFS_ATTR_RW(_name, _mode, _show, NULL)
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#define BTRFS_ATTR_PTR(_name) (&btrfs_attr_##_name.attr)
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struct btrfs_feature_attr {
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struct kobj_attribute kobj_attr;
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enum btrfs_feature_set feature_set;
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u64 feature_bit;
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};
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#define BTRFS_FEAT_ATTR(_name, _feature_set, _prefix, _feature_bit) \
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static struct btrfs_feature_attr btrfs_attr_##_name = { \
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.kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \
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btrfs_feature_attr_show, \
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btrfs_feature_attr_store), \
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.feature_set = _feature_set, \
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.feature_bit = _prefix ##_## _feature_bit, \
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}
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#define BTRFS_FEAT_ATTR_PTR(_name) (&btrfs_attr_##_name.kobj_attr.attr)
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#define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
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BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
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#define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
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BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT, feature)
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#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
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BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
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/* convert from attribute */
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#define to_btrfs_feature_attr(a) \
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container_of(a, struct btrfs_feature_attr, kobj_attr)
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#define attr_to_btrfs_attr(a) container_of(a, struct kobj_attribute, attr)
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#define attr_to_btrfs_feature_attr(a) \
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to_btrfs_feature_attr(attr_to_btrfs_attr(a))
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char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
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extern const char * const btrfs_feature_set_names[3];
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#endif /* _BTRFS_SYSFS_H_ */
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