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1 | // SPDX-License-Identifier: GPL-2.0+ | |
2 | /* | |
3 | * Copyright (C) 2018 Oracle. All Rights Reserved. | |
4 | * Author: Darrick J. Wong <darrick.wong@oracle.com> | |
5 | */ | |
6 | #include "xfs.h" | |
7 | #include <stdint.h> | |
8 | #include <stdlib.h> | |
9 | #include <sys/statvfs.h> | |
10 | #include "platform_defs.h" | |
11 | #include "xfs_arch.h" | |
12 | #include "libfrog/paths.h" | |
13 | #include "libfrog/workqueue.h" | |
14 | #include "xfs_scrub.h" | |
15 | #include "common.h" | |
16 | #include "fscounters.h" | |
17 | #include "libfrog/bulkstat.h" | |
18 | ||
19 | /* | |
20 | * Filesystem counter collection routines. We can count the number of | |
21 | * inodes in the filesystem, and we can estimate the block counters. | |
22 | */ | |
23 | ||
24 | /* Count the number of inodes in the filesystem. */ | |
25 | ||
26 | /* INUMBERS wrapper routines. */ | |
27 | struct count_inodes { | |
28 | int error; | |
29 | uint64_t counters[0]; | |
30 | }; | |
31 | ||
32 | /* | |
33 | * Count the number of inodes. Use INUMBERS to figure out how many inodes | |
34 | * exist in the filesystem, assuming we've already scrubbed that. | |
35 | */ | |
36 | static void | |
37 | count_ag_inodes( | |
38 | struct workqueue *wq, | |
39 | xfs_agnumber_t agno, | |
40 | void *arg) | |
41 | { | |
42 | struct count_inodes *ci = arg; | |
43 | struct scrub_ctx *ctx = (struct scrub_ctx *)wq->wq_ctx; | |
44 | struct xfs_inumbers_req *ireq; | |
45 | uint64_t nr = 0; | |
46 | unsigned int i; | |
47 | int error; | |
48 | ||
49 | error = -xfrog_inumbers_alloc_req(64, 0, &ireq); | |
50 | if (error) { | |
51 | ci->error = error; | |
52 | return; | |
53 | } | |
54 | xfrog_inumbers_set_ag(ireq, agno); | |
55 | ||
56 | while (!ci->error && (error = -xfrog_inumbers(&ctx->mnt, ireq)) == 0) { | |
57 | if (ireq->hdr.ocount == 0) | |
58 | break; | |
59 | for (i = 0; i < ireq->hdr.ocount; i++) | |
60 | nr += ireq->inumbers[i].xi_alloccount; | |
61 | } | |
62 | if (error) | |
63 | ci->error = error; | |
64 | ||
65 | free(ireq); | |
66 | ||
67 | ci->counters[agno] = nr; | |
68 | } | |
69 | ||
70 | /* | |
71 | * Count all the inodes in a filesystem. Returns 0 or a positive error number. | |
72 | */ | |
73 | int | |
74 | scrub_count_all_inodes( | |
75 | struct scrub_ctx *ctx, | |
76 | uint64_t *count) | |
77 | { | |
78 | struct count_inodes *ci; | |
79 | xfs_agnumber_t agno; | |
80 | struct workqueue wq; | |
81 | int ret, ret2; | |
82 | ||
83 | ci = calloc(1, sizeof(struct count_inodes) + | |
84 | (ctx->mnt.fsgeom.agcount * sizeof(uint64_t))); | |
85 | if (!ci) | |
86 | return errno; | |
87 | ||
88 | ret = -workqueue_create(&wq, (struct xfs_mount *)ctx, | |
89 | scrub_nproc_workqueue(ctx)); | |
90 | if (ret) | |
91 | goto out_free; | |
92 | ||
93 | for (agno = 0; agno < ctx->mnt.fsgeom.agcount && !ci->error; agno++) { | |
94 | ret = -workqueue_add(&wq, count_ag_inodes, agno, ci); | |
95 | if (ret) | |
96 | break; | |
97 | } | |
98 | ||
99 | ret2 = -workqueue_terminate(&wq); | |
100 | if (!ret && ret2) | |
101 | ret = ret2; | |
102 | workqueue_destroy(&wq); | |
103 | ||
104 | if (ci->error) { | |
105 | ret = ci->error; | |
106 | goto out_free; | |
107 | } | |
108 | ||
109 | for (agno = 0; agno < ctx->mnt.fsgeom.agcount; agno++) | |
110 | *count += ci->counters[agno]; | |
111 | ||
112 | out_free: | |
113 | free(ci); | |
114 | return ret; | |
115 | } | |
116 | ||
117 | /* | |
118 | * Estimate the number of blocks and used inodes in the filesystem. Returns 0 | |
119 | * or a positive error number. | |
120 | */ | |
121 | int | |
122 | scrub_scan_estimate_blocks( | |
123 | struct scrub_ctx *ctx, | |
124 | unsigned long long *d_blocks, | |
125 | unsigned long long *d_bfree, | |
126 | unsigned long long *r_blocks, | |
127 | unsigned long long *r_bfree, | |
128 | unsigned long long *f_files_used) | |
129 | { | |
130 | struct xfs_fsop_counts fc; | |
131 | int error; | |
132 | ||
133 | /* Fetch the filesystem counters. */ | |
134 | error = ioctl(ctx->mnt.fd, XFS_IOC_FSCOUNTS, &fc); | |
135 | if (error) | |
136 | return errno; | |
137 | ||
138 | *d_blocks = ctx->mnt.fsgeom.datablocks; | |
139 | *d_bfree = fc.freedata; | |
140 | *r_blocks = ctx->mnt.fsgeom.rtblocks; | |
141 | *r_bfree = fc.freertx; | |
142 | *f_files_used = fc.allocino - fc.freeino; | |
143 | ||
144 | return 0; | |
145 | } |