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-rw-r--r--fs/gfs2/super.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index ca831991cbc2..c3ba3d9d0aac 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -33,313 +33,6 @@
33#include "trans.h" 33#include "trans.h"
34#include "util.h" 34#include "util.h"
35 35
36static const u32 gfs2_old_fs_formats[] = {
37 0
38};
39
40static const u32 gfs2_old_multihost_formats[] = {
41 0
42};
43
44/**
45 * gfs2_tune_init - Fill a gfs2_tune structure with default values
46 * @gt: tune
47 *
48 */
49
50void gfs2_tune_init(struct gfs2_tune *gt)
51{
52 spin_lock_init(&gt->gt_spin);
53
54 gt->gt_demote_secs = 300;
55 gt->gt_incore_log_blocks = 1024;
56 gt->gt_log_flush_secs = 60;
57 gt->gt_recoverd_secs = 60;
58 gt->gt_logd_secs = 1;
59 gt->gt_quotad_secs = 5;
60 gt->gt_quota_simul_sync = 64;
61 gt->gt_quota_warn_period = 10;
62 gt->gt_quota_scale_num = 1;
63 gt->gt_quota_scale_den = 1;
64 gt->gt_quota_cache_secs = 300;
65 gt->gt_quota_quantum = 60;
66 gt->gt_atime_quantum = 3600;
67 gt->gt_new_files_jdata = 0;
68 gt->gt_max_readahead = 1 << 18;
69 gt->gt_stall_secs = 600;
70 gt->gt_complain_secs = 10;
71 gt->gt_statfs_quantum = 30;
72 gt->gt_statfs_slow = 0;
73}
74
75/**
76 * gfs2_check_sb - Check superblock
77 * @sdp: the filesystem
78 * @sb: The superblock
79 * @silent: Don't print a message if the check fails
80 *
81 * Checks the version code of the FS is one that we understand how to
82 * read and that the sizes of the various on-disk structures have not
83 * changed.
84 */
85
86int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
87{
88 unsigned int x;
89
90 if (sb->sb_magic != GFS2_MAGIC ||
91 sb->sb_type != GFS2_METATYPE_SB) {
92 if (!silent)
93 printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
94 return -EINVAL;
95 }
96
97 /* If format numbers match exactly, we're done. */
98
99 if (sb->sb_fs_format == GFS2_FORMAT_FS &&
100 sb->sb_multihost_format == GFS2_FORMAT_MULTI)
101 return 0;
102
103 if (sb->sb_fs_format != GFS2_FORMAT_FS) {
104 for (x = 0; gfs2_old_fs_formats[x]; x++)
105 if (gfs2_old_fs_formats[x] == sb->sb_fs_format)
106 break;
107
108 if (!gfs2_old_fs_formats[x]) {
109 printk(KERN_WARNING
110 "GFS2: code version (%u, %u) is incompatible "
111 "with ondisk format (%u, %u)\n",
112 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
113 sb->sb_fs_format, sb->sb_multihost_format);
114 printk(KERN_WARNING
115 "GFS2: I don't know how to upgrade this FS\n");
116 return -EINVAL;
117 }
118 }
119
120 if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
121 for (x = 0; gfs2_old_multihost_formats[x]; x++)
122 if (gfs2_old_multihost_formats[x] ==
123 sb->sb_multihost_format)
124 break;
125
126 if (!gfs2_old_multihost_formats[x]) {
127 printk(KERN_WARNING
128 "GFS2: code version (%u, %u) is incompatible "
129 "with ondisk format (%u, %u)\n",
130 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
131 sb->sb_fs_format, sb->sb_multihost_format);
132 printk(KERN_WARNING
133 "GFS2: I don't know how to upgrade this FS\n");
134 return -EINVAL;
135 }
136 }
137
138 if (!sdp->sd_args.ar_upgrade) {
139 printk(KERN_WARNING
140 "GFS2: code version (%u, %u) is incompatible "
141 "with ondisk format (%u, %u)\n",
142 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
143 sb->sb_fs_format, sb->sb_multihost_format);
144 printk(KERN_INFO
145 "GFS2: Use the \"upgrade\" mount option to upgrade "
146 "the FS\n");
147 printk(KERN_INFO "GFS2: See the manual for more details\n");
148 return -EINVAL;
149 }
150
151 return 0;
152}
153
154
155static void end_bio_io_page(struct bio *bio, int error)
156{
157 struct page *page = bio->bi_private;
158
159 if (!error)
160 SetPageUptodate(page);
161 else
162 printk(KERN_WARNING "gfs2: error %d reading superblock\n", error);
163 unlock_page(page);
164}
165
166static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
167{
168 const struct gfs2_sb *str = buf;
169
170 sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
171 sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
172 sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
173 sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
174 sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
175 sb->sb_bsize = be32_to_cpu(str->sb_bsize);
176 sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
177 sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
178 sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
179 sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
180 sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
181
182 memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
183 memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
184}
185
186/**
187 * gfs2_read_super - Read the gfs2 super block from disk
188 * @sdp: The GFS2 super block
189 * @sector: The location of the super block
190 * @error: The error code to return
191 *
192 * This uses the bio functions to read the super block from disk
193 * because we want to be 100% sure that we never read cached data.
194 * A super block is read twice only during each GFS2 mount and is
195 * never written to by the filesystem. The first time its read no
196 * locks are held, and the only details which are looked at are those
197 * relating to the locking protocol. Once locking is up and working,
198 * the sb is read again under the lock to establish the location of
199 * the master directory (contains pointers to journals etc) and the
200 * root directory.
201 *
202 * Returns: 0 on success or error
203 */
204
205int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
206{
207 struct super_block *sb = sdp->sd_vfs;
208 struct gfs2_sb *p;
209 struct page *page;
210 struct bio *bio;
211
212 page = alloc_page(GFP_NOFS);
213 if (unlikely(!page))
214 return -ENOBUFS;
215
216 ClearPageUptodate(page);
217 ClearPageDirty(page);
218 lock_page(page);
219
220 bio = bio_alloc(GFP_NOFS, 1);
221 if (unlikely(!bio)) {
222 __free_page(page);
223 return -ENOBUFS;
224 }
225
226 bio->bi_sector = sector * (sb->s_blocksize >> 9);
227 bio->bi_bdev = sb->s_bdev;
228 bio_add_page(bio, page, PAGE_SIZE, 0);
229
230 bio->bi_end_io = end_bio_io_page;
231 bio->bi_private = page;
232 submit_bio(READ_SYNC | (1 << BIO_RW_META), bio);
233 wait_on_page_locked(page);
234 bio_put(bio);
235 if (!PageUptodate(page)) {
236 __free_page(page);
237 return -EIO;
238 }
239 p = kmap(page);
240 gfs2_sb_in(&sdp->sd_sb, p);
241 kunmap(page);
242 __free_page(page);
243 return 0;
244}
245
246/**
247 * gfs2_read_sb - Read super block
248 * @sdp: The GFS2 superblock
249 * @gl: the glock for the superblock (assumed to be held)
250 * @silent: Don't print message if mount fails
251 *
252 */
253
254int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent)
255{
256 u32 hash_blocks, ind_blocks, leaf_blocks;
257 u32 tmp_blocks;
258 unsigned int x;
259 int error;
260
261 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
262 if (error) {
263 if (!silent)
264 fs_err(sdp, "can't read superblock\n");
265 return error;
266 }
267
268 error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
269 if (error)
270 return error;
271
272 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
273 GFS2_BASIC_BLOCK_SHIFT;
274 sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
275 sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
276 sizeof(struct gfs2_dinode)) / sizeof(u64);
277 sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
278 sizeof(struct gfs2_meta_header)) / sizeof(u64);
279 sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
280 sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
281 sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
282 sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
283 sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
284 sizeof(struct gfs2_meta_header)) /
285 sizeof(struct gfs2_quota_change);
286
287 /* Compute maximum reservation required to add a entry to a directory */
288
289 hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH),
290 sdp->sd_jbsize);
291
292 ind_blocks = 0;
293 for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
294 tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
295 ind_blocks += tmp_blocks;
296 }
297
298 leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
299
300 sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
301
302 sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
303 sizeof(struct gfs2_dinode);
304 sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
305 for (x = 2;; x++) {
306 u64 space, d;
307 u32 m;
308
309 space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
310 d = space;
311 m = do_div(d, sdp->sd_inptrs);
312
313 if (d != sdp->sd_heightsize[x - 1] || m)
314 break;
315 sdp->sd_heightsize[x] = space;
316 }
317 sdp->sd_max_height = x;
318 sdp->sd_heightsize[x] = ~0;
319 gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
320
321 sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize -
322 sizeof(struct gfs2_dinode);
323 sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs;
324 for (x = 2;; x++) {
325 u64 space, d;
326 u32 m;
327
328 space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs;
329 d = space;
330 m = do_div(d, sdp->sd_inptrs);
331
332 if (d != sdp->sd_jheightsize[x - 1] || m)
333 break;
334 sdp->sd_jheightsize[x] = space;
335 }
336 sdp->sd_max_jheight = x;
337 sdp->sd_jheightsize[x] = ~0;
338 gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
339
340 return 0;
341}
342
343/** 36/**
344 * gfs2_jindex_hold - Grab a lock on the jindex 37 * gfs2_jindex_hold - Grab a lock on the jindex
345 * @sdp: The GFS2 superblock 38 * @sdp: The GFS2 superblock
@@ -581,39 +274,6 @@ fail:
581 return error; 274 return error;
582} 275}
583 276
584/**
585 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
586 * @sdp: the filesystem
587 *
588 * Returns: errno
589 */
590
591int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
592{
593 struct gfs2_holder t_gh;
594 int error;
595
596 gfs2_quota_sync(sdp);
597 gfs2_statfs_sync(sdp);
598
599 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,
600 &t_gh);
601 if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
602 return error;
603
604 gfs2_meta_syncfs(sdp);
605 gfs2_log_shutdown(sdp);
606
607 clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
608
609 if (t_gh.gh_gl)
610 gfs2_glock_dq_uninit(&t_gh);
611
612 gfs2_quota_cleanup(sdp);
613
614 return error;
615}
616
617static void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) 277static void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
618{ 278{
619 const struct gfs2_statfs_change *str = buf; 279 const struct gfs2_statfs_change *str = buf;
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