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74 lines
1.7 KiB
74 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* V9FS cache definitions. |
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* |
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* Copyright (C) 2009 by Abhishek Kulkarni <[email protected]> |
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*/ |
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#include <linux/jiffies.h> |
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#include <linux/file.h> |
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#include <linux/slab.h> |
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#include <linux/stat.h> |
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#include <linux/sched.h> |
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#include <linux/fs.h> |
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#include <net/9p/9p.h> |
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#include "v9fs.h" |
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#include "cache.h" |
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int v9fs_cache_session_get_cookie(struct v9fs_session_info *v9ses, |
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const char *dev_name) |
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{ |
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struct fscache_volume *vcookie; |
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char *name, *p; |
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name = kasprintf(GFP_KERNEL, "9p,%s,%s", |
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dev_name, v9ses->cachetag ?: v9ses->aname); |
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if (!name) |
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return -ENOMEM; |
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for (p = name; *p; p++) |
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if (*p == '/') |
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*p = ';'; |
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vcookie = fscache_acquire_volume(name, NULL, NULL, 0); |
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p9_debug(P9_DEBUG_FSC, "session %p get volume %p (%s)\n", |
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v9ses, vcookie, name); |
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if (IS_ERR(vcookie)) { |
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if (vcookie != ERR_PTR(-EBUSY)) { |
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kfree(name); |
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return PTR_ERR(vcookie); |
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} |
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pr_err("Cache volume key already in use (%s)\n", name); |
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vcookie = NULL; |
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} |
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v9ses->fscache = vcookie; |
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kfree(name); |
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return 0; |
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} |
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void v9fs_cache_inode_get_cookie(struct inode *inode) |
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{ |
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struct v9fs_inode *v9inode = V9FS_I(inode); |
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struct v9fs_session_info *v9ses; |
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__le32 version; |
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__le64 path; |
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if (!S_ISREG(inode->i_mode)) |
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return; |
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if (WARN_ON(v9fs_inode_cookie(v9inode))) |
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return; |
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version = cpu_to_le32(v9inode->qid.version); |
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path = cpu_to_le64(v9inode->qid.path); |
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v9ses = v9fs_inode2v9ses(inode); |
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v9inode->netfs.cache = |
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fscache_acquire_cookie(v9fs_session_cache(v9ses), |
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0, |
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&path, sizeof(path), |
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&version, sizeof(version), |
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i_size_read(&v9inode->netfs.inode)); |
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p9_debug(P9_DEBUG_FSC, "inode %p get cookie %p\n", |
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inode, v9fs_inode_cookie(v9inode)); |
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}
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