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@@ -3,6 +3,30 @@
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*/
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#include "types.h"
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+/*
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+ * return true if @layout appears to be valid
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+ */
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+int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
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+{
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+ __u32 su = le32_to_cpu(layout->fl_stripe_unit);
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+ __u32 sc = le32_to_cpu(layout->fl_stripe_count);
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+ __u32 os = le32_to_cpu(layout->fl_object_size);
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+
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+ /* stripe unit, object size must be non-zero, 64k increment */
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+ if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1)))
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+ return 0;
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+ if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1)))
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+ return 0;
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+ /* object size must be a multiple of stripe unit */
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+ if (os < su || os % su)
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+ return 0;
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+ /* stripe count must be non-zero */
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+ if (!sc)
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+ return 0;
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+ return 1;
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+}
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+
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+
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int ceph_flags_to_mode(int flags)
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{
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#ifdef O_DIRECTORY /* fixme */
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