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59 lines
1.2 KiB
59 lines
1.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/ceph/ceph_debug.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/ceph/buffer.h> |
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#include <linux/ceph/decode.h> |
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#include <linux/ceph/libceph.h> /* for ceph_kvmalloc */ |
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struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp) |
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{ |
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struct ceph_buffer *b; |
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b = kmalloc(sizeof(*b), gfp); |
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if (!b) |
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return NULL; |
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b->vec.iov_base = ceph_kvmalloc(len, gfp); |
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if (!b->vec.iov_base) { |
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kfree(b); |
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return NULL; |
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} |
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kref_init(&b->kref); |
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b->alloc_len = len; |
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b->vec.iov_len = len; |
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dout("buffer_new %p\n", b); |
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return b; |
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} |
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EXPORT_SYMBOL(ceph_buffer_new); |
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void ceph_buffer_release(struct kref *kref) |
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{ |
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struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref); |
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dout("buffer_release %p\n", b); |
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kvfree(b->vec.iov_base); |
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kfree(b); |
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} |
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EXPORT_SYMBOL(ceph_buffer_release); |
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int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end) |
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{ |
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size_t len; |
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ceph_decode_need(p, end, sizeof(u32), bad); |
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len = ceph_decode_32(p); |
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dout("decode_buffer len %d\n", (int)len); |
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ceph_decode_need(p, end, len, bad); |
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*b = ceph_buffer_new(len, GFP_NOFS); |
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if (!*b) |
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return -ENOMEM; |
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ceph_decode_copy(p, (*b)->vec.iov_base, len); |
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return 0; |
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bad: |
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return -EINVAL; |
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}
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