| 1 |
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| 2 | #include <linux/ceph/ceph_debug.h>
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| 3 |
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| 4 | #include <linux/module.h>
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| 5 | #include <linux/slab.h>
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| 6 |
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| 7 | #include <linux/ceph/buffer.h>
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| 8 | #include <linux/ceph/decode.h>
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| 9 | #include <linux/ceph/libceph.h>
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| 10 |
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| 11 | struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp)
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| 12 | {
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| 13 | struct ceph_buffer *b;
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| 14 |
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| 15 | b = kmalloc(sizeof(*b), gfp);
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| 16 | if (!b)
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| 17 | return NULL;
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| 18 |
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| 19 | b->vec.iov_base = ceph_kvmalloc(len, gfp);
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| 20 | if (!b->vec.iov_base) {
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| 21 | kfree(b);
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| 22 | return NULL;
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| 23 | }
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| 24 |
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| 25 | kref_init(&b->kref);
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| 26 | b->alloc_len = len;
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| 27 | b->vec.iov_len = len;
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| 28 | dout("buffer_new %p\n", b);
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| 29 | return b;
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| 30 | }
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| 31 | EXPORT_SYMBOL(ceph_buffer_new);
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| 32 |
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| 33 | void ceph_buffer_release(struct kref *kref)
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| 34 | {
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| 35 | struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
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| 36 |
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| 37 | dout("buffer_release %p\n", b);
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| 38 | kvfree(b->vec.iov_base);
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| 39 | kfree(b);
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| 40 | }
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| 41 | EXPORT_SYMBOL(ceph_buffer_release);
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| 42 |
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| 43 | int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end)
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| 44 | {
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| 45 | size_t len;
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| 46 |
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| 47 | ceph_decode_need(p, end, sizeof(u32), bad);
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| 48 | len = ceph_decode_32(p);
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| 49 | dout("decode_buffer len %d\n", (int)len);
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| 50 | ceph_decode_need(p, end, len, bad);
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| 51 | *b = ceph_buffer_new(len, GFP_NOFS);
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| 52 | if (!*b)
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| 53 | return -ENOMEM;
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| 54 | ceph_decode_copy(p, (*b)->vec.iov_base, len);
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| 55 | return 0;
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| 56 | bad:
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| 57 | return -EINVAL;
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| 58 | }
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