projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1f327613 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 60e78d2c AK |
2 | /* |
| 3 | * V9FS cache definitions. | |
| 4 | * | |
| 5 | * Copyright (C) 2009 by Abhishek Kulkarni <adkulkar@umail.iu.edu> | |
| 60e78d2c AK |
6 | */ |
| 7 | ||
| 8 | #include <linux/jiffies.h> | |
| 9 | #include <linux/file.h> | |
| 5a0e3ad6 | 10 | #include <linux/slab.h> |
| 60e78d2c AK |
11 | #include <linux/stat.h> |
| 12 | #include <linux/sched.h> | |
| 13 | #include <linux/fs.h> | |
| 14 | #include <net/9p/9p.h> | |
| 15 | ||
| 16 | #include "v9fs.h" | |
| 17 | #include "cache.h" | |
| 18 | ||
| 24e42e32 DH |
19 | int v9fs_cache_session_get_cookie(struct v9fs_session_info *v9ses, |
| 20 | const char *dev_name) | |
| 60e78d2c | 21 | { |
| 24e42e32 DH |
22 | struct fscache_volume *vcookie; |
| 23 | char *name, *p; | |
| 60e78d2c | 24 | |
| 24e42e32 DH |
25 | name = kasprintf(GFP_KERNEL, "9p,%s,%s", |
| 26 | dev_name, v9ses->cachetag ?: v9ses->aname); | |
| 27 | if (!name) | |
| 28 | return -ENOMEM; | |
| 60e78d2c | 29 | |
| 24e42e32 DH |
30 | for (p = name; *p; p++) |
| 31 | if (*p == '/') | |
| 32 | *p = ';'; | |
| 33 | ||
| 34 | vcookie = fscache_acquire_volume(name, NULL, NULL, 0); | |
| 35 | p9_debug(P9_DEBUG_FSC, "session %p get volume %p (%s)\n", | |
| 36 | v9ses, vcookie, name); | |
| 37 | if (IS_ERR(vcookie)) { | |
| 38 | if (vcookie != ERR_PTR(-EBUSY)) { | |
| 39 | kfree(name); | |
| 40 | return PTR_ERR(vcookie); | |
| 402cb8dd | 41 | } |
| 24e42e32 DH |
42 | pr_err("Cache volume key already in use (%s)\n", name); |
| 43 | vcookie = NULL; | |
| 402cb8dd | 44 | } |
| 24e42e32 DH |
45 | v9ses->fscache = vcookie; |
| 46 | kfree(name); | |
| 47 | return 0; | |
| 60e78d2c AK |
48 | } |
| 49 | ||
| 60e78d2c AK |
50 | void v9fs_cache_inode_get_cookie(struct inode *inode) |
| 51 | { | |
| bc899ee1 | 52 | struct v9fs_inode *v9inode = V9FS_I(inode); |
| 60e78d2c | 53 | struct v9fs_session_info *v9ses; |
| 24e42e32 DH |
54 | __le32 version; |
| 55 | __le64 path; | |
| 60e78d2c AK |
56 | |
| 57 | if (!S_ISREG(inode->i_mode)) | |
| 58 | return; | |
| bc899ee1 | 59 | if (WARN_ON(v9fs_inode_cookie(v9inode))) |
| 60e78d2c AK |
60 | return; |
| 61 | ||
| 24e42e32 DH |
62 | version = cpu_to_le32(v9inode->qid.version); |
| 63 | path = cpu_to_le64(v9inode->qid.path); | |
| 60e78d2c | 64 | v9ses = v9fs_inode2v9ses(inode); |
| 874c8ca1 | 65 | v9inode->netfs.cache = |
| 24e42e32 DH |
66 | fscache_acquire_cookie(v9fs_session_cache(v9ses), |
| 67 | 0, | |
| 68 | &path, sizeof(path), | |
| 69 | &version, sizeof(version), | |
| 874c8ca1 | 70 | i_size_read(&v9inode->netfs.inode)); |
| b4fa966f DH |
71 | if (v9inode->netfs.cache) |
| 72 | mapping_set_release_always(inode->i_mapping); | |
| 60e78d2c | 73 | |
| 5d385153 | 74 | p9_debug(P9_DEBUG_FSC, "inode %p get cookie %p\n", |
| bc899ee1 | 75 | inode, v9fs_inode_cookie(v9inode)); |
| 60e78d2c | 76 | } |