summaryrefslogtreecommitdiffstats
path: root/xlators/mount/fuse/src/fuse-helpers.c
blob: a9f542455f7f6605bc6086369079bf2175b7cfaf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
/*
   Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com>
   This file is part of GlusterFS.

   GlusterFS is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published
   by the Free Software Foundation; either version 3 of the License,
   or (at your option) any later version.

   GlusterFS is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see
   <http://www.gnu.org/licenses/>.
*/

#include "fuse-bridge.h"

xlator_t *
fuse_state_subvol (fuse_state_t *state)
{
        xlator_t *subvol = NULL;

        if (!state)
                return NULL;

        if (state->loc.inode)
                subvol = state->loc.inode->table->xl;

        if (state->fd)
                subvol = state->fd->inode->table->xl;

        return subvol;
}


xlator_t *
fuse_active_subvol (xlator_t *fuse)
{
        fuse_private_t *priv = NULL;

        priv = fuse->private;

        return priv->active_subvol;
}



static void
fuse_resolve_wipe (fuse_resolve_t *resolve)
{
        struct fuse_resolve_comp *comp = NULL;

        if (resolve->path)
                GF_FREE ((void *)resolve->path);

        if (resolve->bname)
                GF_FREE ((void *)resolve->bname);

        if (resolve->resolved)
                GF_FREE ((void *)resolve->resolved);

        loc_wipe (&resolve->deep_loc);

        comp = resolve->components;

        if (comp) {
                int                  i = 0;

                for (i = 0; comp[i].basename; i++) {
                        if (comp[i].inode) {
                                inode_unref (comp[i].inode);
                                comp[i].inode = NULL;
                        }
                }

                GF_FREE ((void *)resolve->components);
        }
}

void
free_fuse_state (fuse_state_t *state)
{
        loc_wipe (&state->loc);

        loc_wipe (&state->loc2);

        if (state->dict) {
                dict_unref (state->dict);
                state->dict = (void *)0xaaaaeeee;
        }
        if (state->name) {
                GF_FREE (state->name);
                state->name = NULL;
        }
        if (state->fd) {
                fd_unref (state->fd);
                state->fd = (void *)0xfdfdfdfd;
        }
        if (state->finh) {
                GF_FREE (state->finh);
                state->finh = NULL;
        }

        fuse_resolve_wipe (&state->resolve);
        fuse_resolve_wipe (&state->resolve2);

#ifdef DEBUG
        memset (state, 0x90, sizeof (*state));
#endif
        GF_FREE (state);
        state = NULL;
}


fuse_state_t *
get_fuse_state (xlator_t *this, fuse_in_header_t *finh)
{
        fuse_state_t *state = NULL;

        state = (void *)GF_CALLOC (1, sizeof (*state),
                                   gf_fuse_mt_fuse_state_t);
        if (!state)
                return NULL;
        state->pool = this->ctx->pool;
        state->finh = finh;
        state->this = this;

        LOCK_INIT (&state->lock);

        return state;
}


call_frame_t *
get_call_frame_for_req (fuse_state_t *state)
{
        call_pool_t           *pool = NULL;
        fuse_in_header_t      *finh = NULL;
        call_frame_t          *frame = NULL;
        xlator_t              *this = NULL;
        fuse_private_t        *priv = NULL;

        pool = state->pool;
        finh = state->finh;
        this = state->this;
        priv = this->private;

        frame = create_frame (this, pool);
        if (!frame)
                return NULL;

        if (finh) {
                frame->root->uid      = finh->uid;
                frame->root->gid      = finh->gid;
                frame->root->pid      = finh->pid;
                frame->root->lk_owner = state->lk_owner;
                frame->root->unique   = finh->unique;
        }

        if (priv && priv->client_pid_set)
                frame->root->pid = priv->client_pid;

        frame->root->type = GF_OP_TYPE_FOP;

        return frame;
}


inode_t *
fuse_ino_to_inode (uint64_t ino, xlator_t *fuse)
{
        inode_t  *inode = NULL;
        xlator_t *active_subvol = NULL;

        if (ino == 1) {
                active_subvol = fuse_active_subvol (fuse);
                if (active_subvol)
                        inode = active_subvol->itable->root;
        } else {
                inode = (inode_t *) (unsigned long) ino;
                inode_ref (inode);
        }

        return inode;
}

uint64_t
inode_to_fuse_nodeid (inode_t *inode)
{
        if (!inode || inode->ino == 1)
                return 1;

        return (unsigned long) inode;
}


GF_MUST_CHECK int32_t
fuse_loc_fill (loc_t *loc, fuse_state_t *state, ino_t ino,
               ino_t par, const char *name)
{
        inode_t  *inode = NULL;
        inode_t  *parent = NULL;
        int32_t   ret = -1;
        char     *path = NULL;

        /* resistance against multiple invocation of loc_fill not to get
           reference leaks via inode_search() */

        if (name) {
                parent = loc->parent;
                if (!parent) {
                        parent = fuse_ino_to_inode (par, state->this);
                        loc->parent = parent;
                }

                inode = loc->inode;
                if (!inode) {
                        inode = inode_grep (parent->table, parent, name);
                        loc->inode = inode;
                }

                ret = inode_path (parent, name, &path);
                if (ret <= 0) {
                        gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
                                "inode_path failed for %"PRId64"/%s",
                                (parent)?parent->ino:0, name);
                        goto fail;
                }
                loc->path = path;
        } else {
                inode = loc->inode;
                if (!inode) {
                        inode = fuse_ino_to_inode (ino, state->this);
                        loc->inode = inode;
                }

                parent = loc->parent;
                if (!parent) {
                        parent = inode_parent (inode, par, name);
                        loc->parent = parent;
                }

                ret = inode_path (inode, NULL, &path);
                if (ret <= 0) {
                        gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
                                "inode_path failed for %"PRId64,
                                (inode)?inode->ino:0);
                        goto fail;
                }
                loc->path = path;
        }

        if (inode)
                loc->ino = inode->ino;

        if (loc->path) {
                loc->name = strrchr (loc->path, '/');
                if (loc->name)
                        loc->name++;
                else
                        loc->name = "";
        }

        if ((ino != 1) && (parent == NULL)) {
                gf_log ("fuse-bridge", GF_LOG_DEBUG,
                        "failed to search parent for %"PRId64"/%s (%"PRId64")",
                        (ino_t)par, name, (ino_t)ino);
                ret = -1;
                goto fail;
        }
        ret = 0;
fail:
        return ret;
}


/* courtesy of folly */
void
gf_fuse_stat2attr (struct iatt *st, struct fuse_attr *fa)
{
        fa->ino        = st->ia_ino;
        fa->size       = st->ia_size;
        fa->blocks     = st->ia_blocks;
        fa->atime      = st->ia_atime;
        fa->mtime      = st->ia_mtime;
        fa->ctime      = st->ia_ctime;
        fa->atimensec  = st->ia_atime_nsec;
        fa->mtimensec  = st->ia_mtime_nsec;
        fa->ctimensec  = st->ia_ctime_nsec;
        fa->mode       = st_mode_from_ia (st->ia_prot, st->ia_type);
        fa->nlink      = st->ia_nlink;
        fa->uid        = st->ia_uid;
        fa->gid        = st->ia_gid;
        fa->rdev       = makedev (ia_major (st->ia_rdev),
                                  ia_minor (st->ia_rdev));
#if FUSE_KERNEL_MINOR_VERSION >= 9
        fa->blksize    = st->ia_blksize;
#endif
#ifdef GF_DARWIN_HOST_OS
        fa->crtime     = (uint64_t)-1;
        fa->crtimensec = (uint32_t)-1;
        fa->flags      = 0;
#endif
}