tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * (C) 2001 Clemson University and The University of Chicago
3 *
4 * See COPYING in top-level directory.
5 */
6
7#include "protocol.h"
8#include "orangefs-kernel.h"
9
10/* tags assigned to kernel upcall operations */
11static __u64 next_tag_value;
12static DEFINE_SPINLOCK(next_tag_value_lock);
13
14/* the orangefs memory caches */
15
16/* a cache for orangefs upcall/downcall operations */
17static struct kmem_cache *op_cache;
18
19int op_cache_initialize(void)
20{
21 op_cache = kmem_cache_create("orangefs_op_cache",
22 sizeof(struct orangefs_kernel_op_s),
23 0,
24 ORANGEFS_CACHE_CREATE_FLAGS,
25 NULL);
26
27 if (!op_cache) {
28 gossip_err("Cannot create orangefs_op_cache\n");
29 return -ENOMEM;
30 }
31
32 /* initialize our atomic tag counter */
33 spin_lock(&next_tag_value_lock);
34 next_tag_value = 100;
35 spin_unlock(&next_tag_value_lock);
36 return 0;
37}
38
39int op_cache_finalize(void)
40{
41 kmem_cache_destroy(op_cache);
42 return 0;
43}
44
45char *get_opname_string(struct orangefs_kernel_op_s *new_op)
46{
47 if (new_op) {
48 __s32 type = new_op->upcall.type;
49
50 if (type == ORANGEFS_VFS_OP_FILE_IO)
51 return "OP_FILE_IO";
52 else if (type == ORANGEFS_VFS_OP_LOOKUP)
53 return "OP_LOOKUP";
54 else if (type == ORANGEFS_VFS_OP_CREATE)
55 return "OP_CREATE";
56 else if (type == ORANGEFS_VFS_OP_GETATTR)
57 return "OP_GETATTR";
58 else if (type == ORANGEFS_VFS_OP_REMOVE)
59 return "OP_REMOVE";
60 else if (type == ORANGEFS_VFS_OP_MKDIR)
61 return "OP_MKDIR";
62 else if (type == ORANGEFS_VFS_OP_READDIR)
63 return "OP_READDIR";
64 else if (type == ORANGEFS_VFS_OP_READDIRPLUS)
65 return "OP_READDIRPLUS";
66 else if (type == ORANGEFS_VFS_OP_SETATTR)
67 return "OP_SETATTR";
68 else if (type == ORANGEFS_VFS_OP_SYMLINK)
69 return "OP_SYMLINK";
70 else if (type == ORANGEFS_VFS_OP_RENAME)
71 return "OP_RENAME";
72 else if (type == ORANGEFS_VFS_OP_STATFS)
73 return "OP_STATFS";
74 else if (type == ORANGEFS_VFS_OP_TRUNCATE)
75 return "OP_TRUNCATE";
76 else if (type == ORANGEFS_VFS_OP_MMAP_RA_FLUSH)
77 return "OP_MMAP_RA_FLUSH";
78 else if (type == ORANGEFS_VFS_OP_FS_MOUNT)
79 return "OP_FS_MOUNT";
80 else if (type == ORANGEFS_VFS_OP_FS_UMOUNT)
81 return "OP_FS_UMOUNT";
82 else if (type == ORANGEFS_VFS_OP_GETXATTR)
83 return "OP_GETXATTR";
84 else if (type == ORANGEFS_VFS_OP_SETXATTR)
85 return "OP_SETXATTR";
86 else if (type == ORANGEFS_VFS_OP_LISTXATTR)
87 return "OP_LISTXATTR";
88 else if (type == ORANGEFS_VFS_OP_REMOVEXATTR)
89 return "OP_REMOVEXATTR";
90 else if (type == ORANGEFS_VFS_OP_PARAM)
91 return "OP_PARAM";
92 else if (type == ORANGEFS_VFS_OP_PERF_COUNT)
93 return "OP_PERF_COUNT";
94 else if (type == ORANGEFS_VFS_OP_CANCEL)
95 return "OP_CANCEL";
96 else if (type == ORANGEFS_VFS_OP_FSYNC)
97 return "OP_FSYNC";
98 else if (type == ORANGEFS_VFS_OP_FSKEY)
99 return "OP_FSKEY";
100 }
101 return "OP_UNKNOWN?";
102}
103
104void orangefs_new_tag(struct orangefs_kernel_op_s *op)
105{
106 spin_lock(&next_tag_value_lock);
107 op->tag = next_tag_value++;
108 if (next_tag_value == 0)
109 next_tag_value = 100;
110 spin_unlock(&next_tag_value_lock);
111}
112
113struct orangefs_kernel_op_s *op_alloc(__s32 type)
114{
115 struct orangefs_kernel_op_s *new_op = NULL;
116
117 new_op = kmem_cache_zalloc(op_cache, GFP_KERNEL);
118 if (new_op) {
119 INIT_LIST_HEAD(&new_op->list);
120 spin_lock_init(&new_op->lock);
121 init_completion(&new_op->waitq);
122
123 new_op->upcall.type = ORANGEFS_VFS_OP_INVALID;
124 new_op->downcall.type = ORANGEFS_VFS_OP_INVALID;
125 new_op->downcall.status = -1;
126
127 new_op->op_state = OP_VFS_STATE_UNKNOWN;
128
129 /* initialize the op specific tag and upcall credentials */
130 orangefs_new_tag(new_op);
131 new_op->upcall.type = type;
132 new_op->attempts = 0;
133 gossip_debug(GOSSIP_CACHE_DEBUG,
134 "Alloced OP (%p: %llu %s)\n",
135 new_op,
136 llu(new_op->tag),
137 get_opname_string(new_op));
138
139 new_op->upcall.uid = from_kuid(current_user_ns(),
140 current_fsuid());
141
142 new_op->upcall.gid = from_kgid(current_user_ns(),
143 current_fsgid());
144 } else {
145 gossip_err("op_alloc: kmem_cache_zalloc failed!\n");
146 }
147 return new_op;
148}
149
150void op_release(struct orangefs_kernel_op_s *orangefs_op)
151{
152 if (orangefs_op) {
153 gossip_debug(GOSSIP_CACHE_DEBUG,
154 "Releasing OP (%p: %llu)\n",
155 orangefs_op,
156 llu(orangefs_op->tag));
157 kmem_cache_free(op_cache, orangefs_op);
158 } else {
159 gossip_err("NULL pointer in op_release\n");
160 }
161}