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| #define FSCACHE_DEBUG_LEVEL COOKIE |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include "internal.h" |
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| int __fscache_register_netfs(struct fscache_netfs *netfs) |
| { |
| <------>struct fscache_cookie *candidate, *cookie; |
| |
| <------>_enter("{%s}", netfs->name); |
| |
| <------> |
| <------>candidate = fscache_alloc_cookie(&fscache_fsdef_index, |
| <------><------><------><------><------> &fscache_fsdef_netfs_def, |
| <------><------><------><------><------> netfs->name, strlen(netfs->name), |
| <------><------><------><------><------> &netfs->version, sizeof(netfs->version), |
| <------><------><------><------><------> netfs, 0); |
| <------>if (!candidate) { |
| <------><------>_leave(" = -ENOMEM"); |
| <------><------>return -ENOMEM; |
| <------>} |
| |
| <------>candidate->flags = 1 << FSCACHE_COOKIE_ENABLED; |
| |
| <------> |
| <------>cookie = fscache_hash_cookie(candidate); |
| <------>if (!cookie) |
| <------><------>goto already_registered; |
| <------>if (cookie != candidate) { |
| <------><------>trace_fscache_cookie(candidate, fscache_cookie_discard, 1); |
| <------><------>fscache_free_cookie(candidate); |
| <------>} |
| |
| <------>fscache_cookie_get(cookie->parent, fscache_cookie_get_register_netfs); |
| <------>atomic_inc(&cookie->parent->n_children); |
| |
| <------>netfs->primary_index = cookie; |
| |
| <------>pr_notice("Netfs '%s' registered for caching\n", netfs->name); |
| <------>trace_fscache_netfs(netfs); |
| <------>_leave(" = 0"); |
| <------>return 0; |
| |
| already_registered: |
| <------>fscache_cookie_put(candidate, fscache_cookie_put_dup_netfs); |
| <------>_leave(" = -EEXIST"); |
| <------>return -EEXIST; |
| } |
| EXPORT_SYMBOL(__fscache_register_netfs); |
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| void __fscache_unregister_netfs(struct fscache_netfs *netfs) |
| { |
| <------>_enter("{%s.%u}", netfs->name, netfs->version); |
| |
| <------>fscache_relinquish_cookie(netfs->primary_index, NULL, false); |
| <------>pr_notice("Netfs '%s' unregistered from caching\n", netfs->name); |
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| <------>_leave(""); |
| } |
| EXPORT_SYMBOL(__fscache_unregister_netfs); |
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