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955d940c64
Now that the keys are a contiguous buffer we can format them for the trace buffers with a much more straight forward type check around per-key snprintfs. We can get rid of all the weird kvec code that tried to deal with keys that straddled vectors. With that fixed we can uncomment out the tracing statements that were waiting the key formatting. I was testing with xattr keys so they're added as the code is updated. The rest of the key types will be added seperately as they're used. Signed-off-by: Zach Brown <zab@versity.com>
73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
#ifndef _SCOUTFS_KVEC_H_
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#define _SCOUTFS_KVEC_H_
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#include <linux/uio.h>
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/*
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* The item APIs use kvecs to represent variable size item keys and
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* values.
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*/
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/*
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* This ends up defining the max item size as nr - 1 * page _size.
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*/
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#define SCOUTFS_KVEC_NR 2
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#define SCOUTFS_KVEC_BYTES (SCOUTFS_KVEC_NR * sizeof(struct kvec))
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#define SCOUTFS_DECLARE_KVEC(name) \
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struct kvec name[SCOUTFS_KVEC_NR]
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static inline void scoutfs_kvec_init_all(struct kvec *kvec,
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void *ptr0, size_t len0,
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void *ptr1, size_t len1,
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void *ptr2, ...)
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{
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BUG_ON(ptr2 != NULL);
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kvec[0].iov_base = ptr0;
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kvec[0].iov_len = len0;
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kvec[1].iov_base = ptr1;
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kvec[1].iov_len = len1;
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}
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/*
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* Provide a nice variadic initialization function without having to
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* iterate over the callers arg types. We play some macro games to pad
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* out the callers ptr/len pairs to the full possible number. This will
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* produce confusing errors if an odd number of arguments is given and
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* the padded ptr/length types aren't compatible with the fixed
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* arguments in the static inline.
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*/
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#define scoutfs_kvec_init(val, ...) \
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scoutfs_kvec_init_all(val, __VA_ARGS__, NULL, 0, NULL, 0)
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static inline int scoutfs_kvec_length(struct kvec *kvec)
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{
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BUILD_BUG_ON(sizeof(struct kvec) != sizeof(struct iovec));
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BUILD_BUG_ON(offsetof(struct kvec, iov_len) !=
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offsetof(struct iovec, iov_len));
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BUILD_BUG_ON(member_sizeof(struct kvec, iov_len) !=
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member_sizeof(struct iovec, iov_len));
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return iov_length((struct iovec *)kvec, SCOUTFS_KVEC_NR);
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}
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void scoutfs_kvec_clone(struct kvec *dst, struct kvec *src);
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int scoutfs_kvec_memcmp(struct kvec *a, struct kvec *b);
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int scoutfs_kvec_cmp_overlap(struct kvec *a, struct kvec *b,
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struct kvec *c, struct kvec *d);
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int scoutfs_kvec_memcpy(struct kvec *dst, struct kvec *src);
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int scoutfs_kvec_memcpy_truncate(struct kvec *dst, struct kvec *src);
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int scoutfs_kvec_dup_flatten(struct kvec *dst, struct kvec *src);
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void scoutfs_kvec_kfree(struct kvec *kvec);
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void scoutfs_kvec_init_null(struct kvec *kvec);
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void scoutfs_kvec_swap(struct kvec *a, struct kvec *b);
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int scoutfs_kvec_alloc_key(struct kvec *kvec);
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void scoutfs_kvec_init_key(struct kvec *kvec);
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void scoutfs_kvec_set_max_key(struct kvec *kvec);
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void scoutfs_kvec_clone_less(struct kvec *dst, struct kvec *src);
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void scoutfs_kvec_be_inc(struct kvec *kvec);
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void scoutfs_kvec_be_dec(struct kvec *kvec);
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#endif
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