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authorLinus Torvalds <torvalds@linux-foundation.org>2008-10-10 14:02:22 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-10 14:02:22 -0400
commit445e1ceda377a681c6f53595311b0d654ca21003 (patch)
treef3298bd926e67d33944992a485a05374f592bef1
parentef5bef357cdf49f3a386c7102dbf3be5f7e5c913 (diff)
parent254db57f9b12daba841a4d91ddb9a8161e9c74ba (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw: GFS2: Support for I/O barriers GFS2: Add UUID to GFS2 sb GFS2: high time to take some time over atime GFS2: The war on bloat GFS2: GFS2 will panic if you misspell any mount options GFS2: Direct IO write at end of file error GFS2: Use an IS_ERR test rather than a NULL test GFS2: Fix race relating to glock min-hold time GFS2: Fix & clean up GFS2 rename GFS2: rm on multiple nodes causes panic GFS2: Fix metafs mounts GFS2: Fix debugfs glock file iterator
Diffstat
-rw-r--r--fs/gfs2/glock.c15
-rw-r--r--fs/gfs2/glock.h1
-rw-r--r--fs/gfs2/incore.h38
-rw-r--r--fs/gfs2/inode.c159
-rw-r--r--fs/gfs2/inode.h2
-rw-r--r--fs/gfs2/log.c21
-rw-r--r--fs/gfs2/mount.c7
-rw-r--r--fs/gfs2/ops_address.c18
-rw-r--r--fs/gfs2/ops_file.c16
-rw-r--r--fs/gfs2/ops_fstype.c578
-rw-r--r--fs/gfs2/ops_inode.c127
-rw-r--r--fs/gfs2/ops_super.c108
-rw-r--r--fs/gfs2/super.c340
-rw-r--r--fs/gfs2/super.h6
-rw-r--r--fs/gfs2/sys.c11
-rw-r--r--include/linux/gfs2_ondisk.h6
16 files changed, 654 insertions, 799 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 13391e546616..c962283d4e7f 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1265,6 +1265,8 @@ static void blocking_cb(struct gfs2_sbd *sdp, struct lm_lockname *name,
1265 holdtime = gl->gl_tchange + gl->gl_ops->go_min_hold_time; 1265 holdtime = gl->gl_tchange + gl->gl_ops->go_min_hold_time;
1266 if (time_before(now, holdtime)) 1266 if (time_before(now, holdtime))
1267 delay = holdtime - now; 1267 delay = holdtime - now;
1268 if (test_bit(GLF_REPLY_PENDING, &gl->gl_flags))
1269 delay = gl->gl_ops->go_min_hold_time;
1268 1270
1269 spin_lock(&gl->gl_spin); 1271 spin_lock(&gl->gl_spin);
1270 handle_callback(gl, state, 1, delay); 1272 handle_callback(gl, state, 1, delay);
@@ -1578,8 +1580,6 @@ static const char *hflags2str(char *buf, unsigned flags, unsigned long iflags)
1578 *p++ = 'a'; 1580 *p++ = 'a';
1579 if (flags & GL_EXACT) 1581 if (flags & GL_EXACT)
1580 *p++ = 'E'; 1582 *p++ = 'E';
1581 if (flags & GL_ATIME)
1582 *p++ = 'a';
1583 if (flags & GL_NOCACHE) 1583 if (flags & GL_NOCACHE)
1584 *p++ = 'c'; 1584 *p++ = 'c';
1585 if (test_bit(HIF_HOLDER, &iflags)) 1585 if (test_bit(HIF_HOLDER, &iflags))
@@ -1816,15 +1816,17 @@ restart:
1816 if (gl) { 1816 if (gl) {
1817 gi->gl = hlist_entry(gl->gl_list.next, 1817 gi->gl = hlist_entry(gl->gl_list.next,
1818 struct gfs2_glock, gl_list); 1818 struct gfs2_glock, gl_list);
1819 if (gi->gl) 1819 } else {
1820 gfs2_glock_hold(gi->gl); 1820 gi->gl = hlist_entry(gl_hash_table[gi->hash].hb_list.first,
1821 struct gfs2_glock, gl_list);
1821 } 1822 }
1823 if (gi->gl)
1824 gfs2_glock_hold(gi->gl);
1822 read_unlock(gl_lock_addr(gi->hash)); 1825 read_unlock(gl_lock_addr(gi->hash));
1823 if (gl) 1826 if (gl)
1824 gfs2_glock_put(gl); 1827 gfs2_glock_put(gl);
1825 if (gl && gi->gl == NULL)
1826 gi->hash++;
1827 while (gi->gl == NULL) { 1828 while (gi->gl == NULL) {
1829 gi->hash++;
1828 if (gi->hash >= GFS2_GL_HASH_SIZE) 1830 if (gi->hash >= GFS2_GL_HASH_SIZE)
1829 return 1; 1831 return 1;
1830 read_lock(gl_lock_addr(gi->hash)); 1832 read_lock(gl_lock_addr(gi->hash));
@@ -1833,7 +1835,6 @@ restart:
1833 if (gi->gl) 1835 if (gi->gl)
1834 gfs2_glock_hold(gi->gl); 1836 gfs2_glock_hold(gi->gl);
1835 read_unlock(gl_lock_addr(gi->hash)); 1837 read_unlock(gl_lock_addr(gi->hash));
1836 gi->hash++;
1837 } 1838 }
1838 1839
1839 if (gi->sdp != gi->gl->gl_sbd) 1840 if (gi->sdp != gi->gl->gl_sbd)
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 971d92af70fc..695c6b193611 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -24,7 +24,6 @@
24#define GL_ASYNC 0x00000040 24#define GL_ASYNC 0x00000040
25#define GL_EXACT 0x00000080 25#define GL_EXACT 0x00000080
26#define GL_SKIP 0x00000100 26#define GL_SKIP 0x00000100
27#define GL_ATIME 0x00000200
28#define GL_NOCACHE 0x00000400 27#define GL_NOCACHE 0x00000400
29 28
30#define GLR_TRYFAILED 13 29#define GLR_TRYFAILED 13
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 448697a5c462..f566ec1b4e8e 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -386,20 +386,21 @@ struct gfs2_statfs_change_host {
386#define GFS2_DATA_ORDERED 2 386#define GFS2_DATA_ORDERED 2
387 387
388struct gfs2_args { 388struct gfs2_args {
389 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 389 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
390 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 390 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
391 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 391 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
392 int ar_spectator; /* Don't get a journal because we're always RO */ 392 unsigned int ar_spectator:1; /* Don't get a journal */
393 int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */ 393 unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */
394 int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */ 394 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
395 int ar_localcaching; /* Local-style caching (dangerous on multihost) */ 395 unsigned int ar_localcaching:1; /* Local caching */
396 int ar_debug; /* Oops on errors instead of trying to be graceful */ 396 unsigned int ar_debug:1; /* Oops on errors */
397 int ar_upgrade; /* Upgrade ondisk/multihost format */ 397 unsigned int ar_upgrade:1; /* Upgrade ondisk format */
398 unsigned int ar_num_glockd; /* Number of glockd threads */ 398 unsigned int ar_posix_acl:1; /* Enable posix acls */
399 int ar_posix_acl; /* Enable posix acls */ 399 unsigned int ar_quota:2; /* off/account/on */
400 int ar_quota; /* off/account/on */ 400 unsigned int ar_suiddir:1; /* suiddir support */
401 int ar_suiddir; /* suiddir support */ 401 unsigned int ar_data:2; /* ordered/writeback */
402 int ar_data; /* ordered/writeback */ 402 unsigned int ar_meta:1; /* mount metafs */
403 unsigned int ar_num_glockd; /* Number of glockd threads */
403}; 404};
404 405
405struct gfs2_tune { 406struct gfs2_tune {
@@ -419,7 +420,6 @@ struct gfs2_tune {
419 unsigned int gt_quota_scale_den; /* Denominator */ 420 unsigned int gt_quota_scale_den; /* Denominator */
420 unsigned int gt_quota_cache_secs; 421 unsigned int gt_quota_cache_secs;
421 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 422 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
422 unsigned int gt_atime_quantum; /* Min secs between atime updates */
423 unsigned int gt_new_files_jdata; 423 unsigned int gt_new_files_jdata;
424 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 424 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
425 unsigned int gt_stall_secs; /* Detects trouble! */ 425 unsigned int gt_stall_secs; /* Detects trouble! */
@@ -432,7 +432,7 @@ enum {
432 SDF_JOURNAL_CHECKED = 0, 432 SDF_JOURNAL_CHECKED = 0,
433 SDF_JOURNAL_LIVE = 1, 433 SDF_JOURNAL_LIVE = 1,
434 SDF_SHUTDOWN = 2, 434 SDF_SHUTDOWN = 2,
435 SDF_NOATIME = 3, 435 SDF_NOBARRIERS = 3,
436}; 436};
437 437
438#define GFS2_FSNAME_LEN 256 438#define GFS2_FSNAME_LEN 256
@@ -461,7 +461,6 @@ struct gfs2_sb_host {
461 461
462struct gfs2_sbd { 462struct gfs2_sbd {
463 struct super_block *sd_vfs; 463 struct super_block *sd_vfs;
464 struct super_block *sd_vfs_meta;
465 struct kobject sd_kobj; 464 struct kobject sd_kobj;
466 unsigned long sd_flags; /* SDF_... */ 465 unsigned long sd_flags; /* SDF_... */
467 struct gfs2_sb_host sd_sb; 466 struct gfs2_sb_host sd_sb;
@@ -499,7 +498,9 @@ struct gfs2_sbd {
499 498
500 /* Inode Stuff */ 499 /* Inode Stuff */
501 500
502 struct inode *sd_master_dir; 501 struct dentry *sd_master_dir;
502 struct dentry *sd_root_dir;
503
503 struct inode *sd_jindex; 504 struct inode *sd_jindex;
504 struct inode *sd_inum_inode; 505 struct inode *sd_inum_inode;
505 struct inode *sd_statfs_inode; 506 struct inode *sd_statfs_inode;
@@ -634,7 +635,6 @@ struct gfs2_sbd {
634 /* Debugging crud */ 635 /* Debugging crud */
635 636
636 unsigned long sd_last_warning; 637 unsigned long sd_last_warning;
637 struct vfsmount *sd_gfs2mnt;
638 struct dentry *debugfs_dir; /* debugfs directory */ 638 struct dentry *debugfs_dir; /* debugfs directory */
639 struct dentry *debugfs_dentry_glocks; /* for debugfs */ 639 struct dentry *debugfs_dentry_glocks; /* for debugfs */
640}; 640};
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 8b0806a32948..7cee695fa441 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -18,6 +18,7 @@
18#include <linux/crc32.h> 18#include <linux/crc32.h>
19#include <linux/lm_interface.h> 19#include <linux/lm_interface.h>
20#include <linux/security.h> 20#include <linux/security.h>
21#include <linux/time.h>
21 22
22#include "gfs2.h" 23#include "gfs2.h"
23#include "incore.h" 24#include "incore.h"
@@ -249,6 +250,7 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
249{ 250{
250 struct gfs2_dinode_host *di = &ip->i_di; 251 struct gfs2_dinode_host *di = &ip->i_di;
251 const struct gfs2_dinode *str = buf; 252 const struct gfs2_dinode *str = buf;
253 struct timespec atime;
252 u16 height, depth; 254 u16 height, depth;
253 255
254 if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr))) 256 if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
@@ -275,8 +277,10 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
275 di->di_size = be64_to_cpu(str->di_size); 277 di->di_size = be64_to_cpu(str->di_size);
276 i_size_write(&ip->i_inode, di->di_size); 278 i_size_write(&ip->i_inode, di->di_size);
277 gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks)); 279 gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
278 ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime); 280 atime.tv_sec = be64_to_cpu(str->di_atime);
279 ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec); 281 atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
282 if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
283 ip->i_inode.i_atime = atime;
280 ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime); 284 ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
281 ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec); 285 ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
282 ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime); 286 ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
@@ -1033,13 +1037,11 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
1033 1037
1034 if (bh) 1038 if (bh)
1035 brelse(bh); 1039 brelse(bh);
1036 if (!inode)
1037 return ERR_PTR(-ENOMEM);
1038 return inode; 1040 return inode;
1039 1041
1040fail_gunlock2: 1042fail_gunlock2:
1041 gfs2_glock_dq_uninit(ghs + 1); 1043 gfs2_glock_dq_uninit(ghs + 1);
1042 if (inode) 1044 if (inode && !IS_ERR(inode))
1043 iput(inode); 1045 iput(inode);
1044fail_gunlock: 1046fail_gunlock:
1045 gfs2_glock_dq(ghs); 1047 gfs2_glock_dq(ghs);
@@ -1140,54 +1142,6 @@ int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
1140 return 0; 1142 return 0;
1141} 1143}
1142 1144
1143/*
1144 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1145 * @this: move this
1146 * @to: to here
1147 *
1148 * Follow @to back to the root and make sure we don't encounter @this
1149 * Assumes we already hold the rename lock.
1150 *
1151 * Returns: errno
1152 */
1153
1154int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1155{
1156 struct inode *dir = &to->i_inode;
1157 struct super_block *sb = dir->i_sb;
1158 struct inode *tmp;
1159 struct qstr dotdot;
1160 int error = 0;
1161
1162 gfs2_str2qstr(&dotdot, "..");
1163
1164 igrab(dir);
1165
1166 for (;;) {
1167 if (dir == &this->i_inode) {
1168 error = -EINVAL;
1169 break;
1170 }
1171 if (dir == sb->s_root->d_inode) {
1172 error = 0;
1173 break;
1174 }
1175
1176 tmp = gfs2_lookupi(dir, &dotdot, 1);
1177 if (IS_ERR(tmp)) {
1178 error = PTR_ERR(tmp);
1179 break;
1180 }
1181
1182 iput(dir);
1183 dir = tmp;
1184 }
1185
1186 iput(dir);
1187
1188 return error;
1189}
1190
1191/** 1145/**
1192 * gfs2_readlinki - return the contents of a symlink 1146 * gfs2_readlinki - return the contents of a symlink
1193 * @ip: the symlink's inode 1147 * @ip: the symlink's inode
@@ -1207,8 +1161,8 @@ int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
1207 unsigned int x; 1161 unsigned int x;
1208 int error; 1162 int error;
1209 1163
1210 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh); 1164 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1211 error = gfs2_glock_nq_atime(&i_gh); 1165 error = gfs2_glock_nq(&i_gh);
1212 if (error) { 1166 if (error) {
1213 gfs2_holder_uninit(&i_gh); 1167 gfs2_holder_uninit(&i_gh);
1214 return error; 1168 return error;
@@ -1243,101 +1197,6 @@ out:
1243 return error; 1197 return error;
1244} 1198}
1245 1199
1246/**
1247 * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
1248 * conditionally update the inode's atime
1249 * @gh: the holder to acquire
1250 *
1251 * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
1252 * Update if the difference between the current time and the inode's current
1253 * atime is greater than an interval specified at mount.
1254 *
1255 * Returns: errno
1256 */
1257
1258int gfs2_glock_nq_atime(struct gfs2_holder *gh)
1259{
1260 struct gfs2_glock *gl = gh->gh_gl;
1261 struct gfs2_sbd *sdp = gl->gl_sbd;
1262 struct gfs2_inode *ip = gl->gl_object;
1263 s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum);
1264 unsigned int state;
1265 int flags;
1266 int error;
1267 struct timespec tv = CURRENT_TIME;
1268
1269 if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) ||
1270 gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) ||
1271 gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops))
1272 return -EINVAL;
1273
1274 state = gh->gh_state;
1275 flags = gh->gh_flags;
1276
1277 error = gfs2_glock_nq(gh);
1278 if (error)
1279 return error;
1280
1281 if (test_bit(SDF_NOATIME, &sdp->sd_flags) ||
1282 (sdp->sd_vfs->s_flags & MS_RDONLY))
1283 return 0;
1284
1285 if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
1286 gfs2_glock_dq(gh);
1287 gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY,
1288 gh);
1289 error = gfs2_glock_nq(gh);
1290 if (error)
1291 return error;
1292
1293 /* Verify that atime hasn't been updated while we were
1294 trying to get exclusive lock. */
1295
1296 tv = CURRENT_TIME;
1297 if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
1298 struct buffer_head *dibh;
1299 struct gfs2_dinode *di;
1300
1301 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
1302 if (error == -EROFS)
1303 return 0;
1304 if (error)
1305 goto fail;
1306
1307 error = gfs2_meta_inode_buffer(ip, &dibh);
1308 if (error)
1309 goto fail_end_trans;
1310
1311 ip->i_inode.i_atime = tv;
1312
1313 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1314 di = (struct gfs2_dinode *)dibh->b_data;
1315 di->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
1316 di->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
1317 brelse(dibh);
1318
1319 gfs2_trans_end(sdp);
1320 }
1321
1322 /* If someone else has asked for the glock,
1323 unlock and let them have it. Then reacquire
1324 in the original state. */
1325 if (gfs2_glock_is_blocking(gl)) {
1326 gfs2_glock_dq(gh);
1327 gfs2_holder_reinit(state, flags, gh);
1328 return gfs2_glock_nq(gh);
1329 }
1330 }
1331
1332 return 0;
1333
1334fail_end_trans:
1335 gfs2_trans_end(sdp);
1336fail:
1337 gfs2_glock_dq(gh);
1338 return error;
1339}
1340
1341static int 1200static int
1342__gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) 1201__gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1343{ 1202{
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index 58f9607d6a86..2d43f69610a0 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -91,9 +91,7 @@ int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
91int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 91int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
92 const struct gfs2_inode *ip); 92 const struct gfs2_inode *ip);
93int gfs2_permission(struct inode *inode, int mask); 93int gfs2_permission(struct inode *inode, int mask);
94int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to);
95int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len); 94int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len);
96int gfs2_glock_nq_atime(struct gfs2_holder *gh);
97int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr); 95int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
98struct inode *gfs2_lookup_simple(struct inode *dip, const char *name); 96struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
99void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf); 97void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index 6c6af9f5e3ab..ad305854bdc6 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -18,6 +18,7 @@
18#include <linux/delay.h> 18#include <linux/delay.h>
19#include <linux/kthread.h> 19#include <linux/kthread.h>
20#include <linux/freezer.h> 20#include <linux/freezer.h>
21#include <linux/bio.h>
21 22
22#include "gfs2.h" 23#include "gfs2.h"
23#include "incore.h" 24#include "incore.h"
@@ -584,7 +585,6 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull)
584 memset(bh->b_data, 0, bh->b_size); 585 memset(bh->b_data, 0, bh->b_size);
585 set_buffer_uptodate(bh); 586 set_buffer_uptodate(bh);
586 clear_buffer_dirty(bh); 587 clear_buffer_dirty(bh);
587 unlock_buffer(bh);
588 588
589 gfs2_ail1_empty(sdp, 0); 589 gfs2_ail1_empty(sdp, 0);
590 tail = current_tail(sdp); 590 tail = current_tail(sdp);
@@ -601,8 +601,23 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull)
601 hash = gfs2_disk_hash(bh->b_data, sizeof(struct gfs2_log_header)); 601 hash = gfs2_disk_hash(bh->b_data, sizeof(struct gfs2_log_header));
602 lh->lh_hash = cpu_to_be32(hash); 602 lh->lh_hash = cpu_to_be32(hash);
603 603
604 set_buffer_dirty(bh); 604 bh->b_end_io = end_buffer_write_sync;
605 if (sync_dirty_buffer(bh)) 605 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
606 goto skip_barrier;
607 get_bh(bh);
608 submit_bh(WRITE_BARRIER | (1 << BIO_RW_META), bh);
609 wait_on_buffer(bh);
610 if (buffer_eopnotsupp(bh)) {
611 clear_buffer_eopnotsupp(bh);
612 set_buffer_uptodate(bh);
613 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
614 lock_buffer(bh);
615skip_barrier:
616 get_bh(bh);
617 submit_bh(WRITE_SYNC | (1 << BIO_RW_META), bh);
618 wait_on_buffer(bh);
619 }
620 if (!buffer_uptodate(bh))
606 gfs2_io_error_bh(sdp, bh); 621 gfs2_io_error_bh(sdp, bh);
607 brelse(bh); 622 brelse(bh);
608 623
diff --git a/fs/gfs2/mount.c b/fs/gfs2/mount.c
index b941f9f9f958..df48333e6f01 100644
--- a/fs/gfs2/mount.c
+++ b/fs/gfs2/mount.c
@@ -42,6 +42,7 @@ enum {
42 Opt_nosuiddir, 42 Opt_nosuiddir,
43 Opt_data_writeback, 43 Opt_data_writeback,
44 Opt_data_ordered, 44 Opt_data_ordered,
45 Opt_meta,
45 Opt_err, 46 Opt_err,
46}; 47};
47 48
@@ -66,6 +67,7 @@ static match_table_t tokens = {
66 {Opt_nosuiddir, "nosuiddir"}, 67 {Opt_nosuiddir, "nosuiddir"},
67 {Opt_data_writeback, "data=writeback"}, 68 {Opt_data_writeback, "data=writeback"},
68 {Opt_data_ordered, "data=ordered"}, 69 {Opt_data_ordered, "data=ordered"},
70 {Opt_meta, "meta"},
69 {Opt_err, NULL} 71 {Opt_err, NULL}
70}; 72};
71 73
@@ -239,6 +241,11 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount)
239 case Opt_data_ordered: 241 case Opt_data_ordered:
240 args->ar_data = GFS2_DATA_ORDERED; 242 args->ar_data = GFS2_DATA_ORDERED;
241 break; 243 break;
244 case Opt_meta:
245 if (remount && args->ar_meta != 1)
246 goto cant_remount;
247 args->ar_meta = 1;
248 break;
242 case Opt_err: 249 case Opt_err:
243 default: 250 default:
244 fs_info(sdp, "unknown option: %s\n", o); 251 fs_info(sdp, "unknown option: %s\n", o);
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index e64a1b04117a..27563816e1c5 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -512,8 +512,8 @@ static int gfs2_readpage(struct file *file, struct page *page)
512 int error; 512 int error;
513 513
514 unlock_page(page); 514 unlock_page(page);
515 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh); 515 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
516 error = gfs2_glock_nq_atime(&gh); 516 error = gfs2_glock_nq(&gh);
517 if (unlikely(error)) 517 if (unlikely(error))
518 goto out; 518 goto out;
519 error = AOP_TRUNCATED_PAGE; 519 error = AOP_TRUNCATED_PAGE;
@@ -594,8 +594,8 @@ static int gfs2_readpages(struct file *file, struct address_space *mapping,
594 struct gfs2_holder gh; 594 struct gfs2_holder gh;
595 int ret; 595 int ret;
596 596
597 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh); 597 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
598 ret = gfs2_glock_nq_atime(&gh); 598 ret = gfs2_glock_nq(&gh);
599 if (unlikely(ret)) 599 if (unlikely(ret))
600 goto out_uninit; 600 goto out_uninit;
601 if (!gfs2_is_stuffed(ip)) 601 if (!gfs2_is_stuffed(ip))
@@ -636,8 +636,8 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping,
636 unsigned to = from + len; 636 unsigned to = from + len;
637 struct page *page; 637 struct page *page;
638 638
639 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ATIME, &ip->i_gh); 639 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh);
640 error = gfs2_glock_nq_atime(&ip->i_gh); 640 error = gfs2_glock_nq(&ip->i_gh);
641 if (unlikely(error)) 641 if (unlikely(error))
642 goto out_uninit; 642 goto out_uninit;
643 643
@@ -975,7 +975,7 @@ static int gfs2_ok_for_dio(struct gfs2_inode *ip, int rw, loff_t offset)
975 if (gfs2_is_stuffed(ip)) 975 if (gfs2_is_stuffed(ip))
976 return 0; 976 return 0;
977 977
978 if (offset > i_size_read(&ip->i_inode)) 978 if (offset >= i_size_read(&ip->i_inode))
979 return 0; 979 return 0;
980 return 1; 980 return 1;
981} 981}
@@ -1000,8 +1000,8 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
1000 * unfortunately have the option of only flushing a range like 1000 * unfortunately have the option of only flushing a range like
1001 * the VFS does. 1001 * the VFS does.
1002 */ 1002 */
1003 gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, GL_ATIME, &gh); 1003 gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, 0, &gh);
1004 rv = gfs2_glock_nq_atime(&gh); 1004 rv = gfs2_glock_nq(&gh);
1005 if (rv) 1005 if (rv)
1006 return rv; 1006 return rv;
1007 rv = gfs2_ok_for_dio(ip, rw, offset); 1007 rv = gfs2_ok_for_dio(ip, rw, offset);
diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
index e9a366d4411c..3a747f8e2188 100644
--- a/fs/gfs2/ops_file.c
+++ b/fs/gfs2/ops_file.c
@@ -89,8 +89,8 @@ static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir)
89 u64 offset = file->f_pos; 89 u64 offset = file->f_pos;
90 int error; 90 int error;
91 91
92 gfs2_holder_init(dip->i_gl, LM_ST_SHARED, GL_ATIME, &d_gh); 92 gfs2_holder_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
93 error = gfs2_glock_nq_atime(&d_gh); 93 error = gfs2_glock_nq(&d_gh);
94 if (error) { 94 if (error) {
95 gfs2_holder_uninit(&d_gh); 95 gfs2_holder_uninit(&d_gh);
96 return error; 96 return error;
@@ -153,8 +153,8 @@ static int gfs2_get_flags(struct file *filp, u32 __user *ptr)
153 int error; 153 int error;
154 u32 fsflags; 154 u32 fsflags;
155 155
156 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh); 156 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
157 error = gfs2_glock_nq_atime(&gh); 157 error = gfs2_glock_nq(&gh);
158 if (error) 158 if (error)
159 return error; 159 return error;
160 160
@@ -351,8 +351,8 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct page *page)
351 struct gfs2_alloc *al; 351 struct gfs2_alloc *al;
352 int ret; 352 int ret;
353 353
354 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ATIME, &gh); 354 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
355 ret = gfs2_glock_nq_atime(&gh); 355 ret = gfs2_glock_nq(&gh);
356 if (ret) 356 if (ret)
357 goto out; 357 goto out;
358 358
@@ -434,8 +434,8 @@ static int gfs2_mmap(struct file *file, struct vm_area_struct *vma)
434 struct gfs2_holder i_gh; 434 struct gfs2_holder i_gh;
435 int error; 435 int error;
436 436
437 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh); 437 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
438 error = gfs2_glock_nq_atime(&i_gh); 438 error = gfs2_glock_nq(&i_gh);
439 if (error) { 439 if (error) {
440 gfs2_holder_uninit(&i_gh); 440 gfs2_holder_uninit(&i_gh);
441 return error; 441 return error;
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index b4d1d6490633..b117fcf2c4f5 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -40,6 +40,44 @@
40#define DO 0 40#define DO 0
41#define UNDO 1 41#define UNDO 1
42 42
43static const u32 gfs2_old_fs_formats[] = {
44 0
45};
46
47static const u32 gfs2_old_multihost_formats[] = {
48 0
49};
50
51/**
52 * gfs2_tune_init - Fill a gfs2_tune structure with default values
53 * @gt: tune
54 *
55 */
56
57static void gfs2_tune_init(struct gfs2_tune *gt)
58{
59 spin_lock_init(&gt->gt_spin);
60
61 gt->gt_demote_secs = 300;
62 gt->gt_incore_log_blocks = 1024;
63 gt->gt_log_flush_secs = 60;
64 gt->gt_recoverd_secs = 60;
65 gt->gt_logd_secs = 1;
66 gt->gt_quotad_secs = 5;
67 gt->gt_quota_simul_sync = 64;
68 gt->gt_quota_warn_period = 10;
69 gt->gt_quota_scale_num = 1;
70 gt->gt_quota_scale_den = 1;
71 gt->gt_quota_cache_secs = 300;
72 gt->gt_quota_quantum = 60;
73 gt->gt_new_files_jdata = 0;
74 gt->gt_max_readahead = 1 << 18;
75 gt->gt_stall_secs = 600;
76 gt->gt_complain_secs = 10;
77 gt->gt_statfs_quantum = 30;
78 gt->gt_statfs_slow = 0;
79}
80
43static struct gfs2_sbd *init_sbd(struct super_block *sb) 81static struct gfs2_sbd *init_sbd(struct super_block *sb)
44{ 82{
45 struct gfs2_sbd *sdp; 83 struct gfs2_sbd *sdp;
@@ -96,21 +134,271 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
96 return sdp; 134 return sdp;
97} 135}
98 136
99static void init_vfs(struct super_block *sb, unsigned noatime) 137
138/**
139 * gfs2_check_sb - Check superblock
140 * @sdp: the filesystem
141 * @sb: The superblock
142 * @silent: Don't print a message if the check fails
143 *
144 * Checks the version code of the FS is one that we understand how to
145 * read and that the sizes of the various on-disk structures have not
146 * changed.
147 */
148
149static int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
100{ 150{
101 struct gfs2_sbd *sdp = sb->s_fs_info; 151 unsigned int x;
102 152
103 sb->s_magic = GFS2_MAGIC; 153 if (sb->sb_magic != GFS2_MAGIC ||
104 sb->s_op = &gfs2_super_ops; 154 sb->sb_type != GFS2_METATYPE_SB) {
105 sb->s_export_op = &gfs2_export_ops; 155 if (!silent)
106 sb->s_time_gran = 1; 156 printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
107 sb->s_maxbytes = MAX_LFS_FILESIZE; 157 return -EINVAL;
158 }
159
160 /* If format numbers match exactly, we're done. */
161
162 if (sb->sb_fs_format == GFS2_FORMAT_FS &&
163 sb->sb_multihost_format == GFS2_FORMAT_MULTI)
164 return 0;
165
166 if (sb->sb_fs_format != GFS2_FORMAT_FS) {
167 for (x = 0; gfs2_old_fs_formats[x]; x++)
168 if (gfs2_old_fs_formats[x] == sb->sb_fs_format)
169 break;
170
171 if (!gfs2_old_fs_formats[x]) {
172 printk(KERN_WARNING
173 "GFS2: code version (%u, %u) is incompatible "
174 "with ondisk format (%u, %u)\n",
175 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
176 sb->sb_fs_format, sb->sb_multihost_format);
177 printk(KERN_WARNING
178 "GFS2: I don't know how to upgrade this FS\n");
179 return -EINVAL;
180 }
181 }
182
183 if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
184 for (x = 0; gfs2_old_multihost_formats[x]; x++)
185 if (gfs2_old_multihost_formats[x] ==
186 sb->sb_multihost_format)
187 break;
188
189 if (!gfs2_old_multihost_formats[x]) {
190 printk(KERN_WARNING
191 "GFS2: code version (%u, %u) is incompatible "
192 "with ondisk format (%u, %u)\n",
193 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
194 sb->sb_fs_format, sb->sb_multihost_format);
195 printk(KERN_WARNING
196 "GFS2: I don't know how to upgrade this FS\n");
197 return -EINVAL;
198 }
199 }
200
201 if (!sdp->sd_args.ar_upgrade) {
202 printk(KERN_WARNING
203 "GFS2: code version (%u, %u) is incompatible "
204 "with ondisk format (%u, %u)\n",
205 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
206 sb->sb_fs_format, sb->sb_multihost_format);
207 printk(KERN_INFO
208 "GFS2: Use the \"upgrade\" mount option to upgrade "
209 "the FS\n");
210 printk(KERN_INFO "GFS2: See the manual for more details\n");
211 return -EINVAL;
212 }
213
214 return 0;
215}
216
217static void end_bio_io_page(struct bio *bio, int error)
218{
219 struct page *page = bio->bi_private;
108 220
109 if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME)) 221 if (!error)
110 set_bit(noatime, &sdp->sd_flags); 222 SetPageUptodate(page);
223 else
224 printk(KERN_WARNING "gfs2: error %d reading superblock\n", error);
225 unlock_page(page);
226}
227
228static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
229{
230 const struct gfs2_sb *str = buf;
231
232 sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
233 sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
234 sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
235 sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
236 sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
237 sb->sb_bsize = be32_to_cpu(str->sb_bsize);
238 sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
239 sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
240 sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
241 sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
242 sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
243
244 memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
245 memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
246}
247
248/**
249 * gfs2_read_super - Read the gfs2 super block from disk
250 * @sdp: The GFS2 super block
251 * @sector: The location of the super block
252 * @error: The error code to return
253 *
254 * This uses the bio functions to read the super block from disk
255 * because we want to be 100% sure that we never read cached data.
256 * A super block is read twice only during each GFS2 mount and is
257 * never written to by the filesystem. The first time its read no
258 * locks are held, and the only details which are looked at are those
259 * relating to the locking protocol. Once locking is up and working,
260 * the sb is read again under the lock to establish the location of
261 * the master directory (contains pointers to journals etc) and the
262 * root directory.
263 *
264 * Returns: 0 on success or error
265 */
266
267static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
268{
269 struct super_block *sb = sdp->sd_vfs;
270 struct gfs2_sb *p;
271 struct page *page;
272 struct bio *bio;
273
274 page = alloc_page(GFP_NOFS);
275 if (unlikely(!page))
276 return -ENOBUFS;
277
278 ClearPageUptodate(page);
279 ClearPageDirty(page);
280 lock_page(page);
281
282 bio = bio_alloc(GFP_NOFS, 1);
283 if (unlikely(!bio)) {
284 __free_page(page);
285 return -ENOBUFS;
286 }
111 287
112 /* Don't let the VFS update atimes. GFS2 handles this itself. */ 288 bio->bi_sector = sector * (sb->s_blocksize >> 9);
113 sb->s_flags |= MS_NOATIME | MS_NODIRATIME; 289 bio->bi_bdev = sb->s_bdev;
290 bio_add_page(bio, page, PAGE_SIZE, 0);
291
292 bio->bi_end_io = end_bio_io_page;
293 bio->bi_private = page;
294 submit_bio(READ_SYNC | (1 << BIO_RW_META), bio);
295 wait_on_page_locked(page);
296 bio_put(bio);
297 if (!PageUptodate(page)) {
298 __free_page(page);
299 return -EIO;
300 }
301 p = kmap(page);
302 gfs2_sb_in(&sdp->sd_sb, p);
303 kunmap(page);
304 __free_page(page);
305 return 0;
306}
307/**
308 * gfs2_read_sb - Read super block
309 * @sdp: The GFS2 superblock
310 * @gl: the glock for the superblock (assumed to be held)
311 * @silent: Don't print message if mount fails
312 *
313 */
314
315static int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent)
316{
317 u32 hash_blocks, ind_blocks, leaf_blocks;
318 u32 tmp_blocks;
319 unsigned int x;
320 int error;
321
322 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
323 if (error) {
324 if (!silent)
325 fs_err(sdp, "can't read superblock\n");
326 return error;
327 }
328
329 error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
330 if (error)
331 return error;
332
333 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
334 GFS2_BASIC_BLOCK_SHIFT;
335 sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
336 sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
337 sizeof(struct gfs2_dinode)) / sizeof(u64);
338 sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
339 sizeof(struct gfs2_meta_header)) / sizeof(u64);
340 sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
341 sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
342 sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
343 sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
344 sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
345 sizeof(struct gfs2_meta_header)) /
346 sizeof(struct gfs2_quota_change);
347
348 /* Compute maximum reservation required to add a entry to a directory */
349
350 hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH),
351 sdp->sd_jbsize);
352
353 ind_blocks = 0;
354 for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
355 tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
356 ind_blocks += tmp_blocks;
357 }
358
359 leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
360
361 sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
362
363 sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
364 sizeof(struct gfs2_dinode);
365 sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
366 for (x = 2;; x++) {
367 u64 space, d;
368 u32 m;
369
370 space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
371 d = space;
372 m = do_div(d, sdp->sd_inptrs);
373
374 if (d != sdp->sd_heightsize[x - 1] || m)
375 break;
376 sdp->sd_heightsize[x] = space;
377 }
378 sdp->sd_max_height = x;
379 sdp->sd_heightsize[x] = ~0;
380 gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
381
382 sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize -
383 sizeof(struct gfs2_dinode);
384 sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs;
385 for (x = 2;; x++) {
386 u64 space, d;
387 u32 m;
388
389 space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs;
390 d = space;
391 m = do_div(d, sdp->sd_inptrs);
392
393 if (d != sdp->sd_jheightsize[x - 1] || m)
394 break;
395 sdp->sd_jheightsize[x] = space;
396 }
397 sdp->sd_max_jheight = x;
398 sdp->sd_jheightsize[x] = ~0;
399 gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
400
401 return 0;
114} 402}
115 403
116static int init_names(struct gfs2_sbd *sdp, int silent) 404static int init_names(struct gfs2_sbd *sdp, int silent)
@@ -224,51 +512,59 @@ fail:
224 return error; 512 return error;
225} 513}
226 514
227static inline struct inode *gfs2_lookup_root(struct super_block *sb, 515static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
228 u64 no_addr) 516 u64 no_addr, const char *name)
229{ 517{
230 return gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0); 518 struct gfs2_sbd *sdp = sb->s_fs_info;
519 struct dentry *dentry;
520 struct inode *inode;
521
522 inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0);
523 if (IS_ERR(inode)) {
524 fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
525 return PTR_ERR(inode);
526 }
527 dentry = d_alloc_root(inode);
528 if (!dentry) {
529 fs_err(sdp, "can't alloc %s dentry\n", name);
530 iput(inode);
531 return -ENOMEM;
532 }
533 dentry->d_op = &gfs2_dops;
534 *dptr = dentry;
535 return 0;
231} 536}
232 537
233static int init_sb(struct gfs2_sbd *sdp, int silent, int undo) 538static int init_sb(struct gfs2_sbd *sdp, int silent)
234{ 539{
235 struct super_block *sb = sdp->sd_vfs; 540 struct super_block *sb = sdp->sd_vfs;
236 struct gfs2_holder sb_gh; 541 struct gfs2_holder sb_gh;
237 u64 no_addr; 542 u64 no_addr;
238 struct inode *inode; 543 int ret;
239 int error = 0;
240 544
241 if (undo) { 545 ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
242 if (sb->s_root) { 546 LM_ST_SHARED, 0, &sb_gh);
243 dput(sb->s_root); 547 if (ret) {
244 sb->s_root = NULL; 548 fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
245 } 549 return ret;
246 return 0;
247 } 550 }
248 551
249 error = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops, 552 ret = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
250 LM_ST_SHARED, 0, &sb_gh); 553 if (ret) {
251 if (error) { 554 fs_err(sdp, "can't read superblock: %d\n", ret);
252 fs_err(sdp, "can't acquire superblock glock: %d\n", error);
253 return error;
254 }
255
256 error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
257 if (error) {
258 fs_err(sdp, "can't read superblock: %d\n", error);
259 goto out; 555 goto out;
260 } 556 }
261 557
262 /* Set up the buffer cache and SB for real */ 558 /* Set up the buffer cache and SB for real */
263 if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) { 559 if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
264 error = -EINVAL; 560 ret = -EINVAL;
265 fs_err(sdp, "FS block size (%u) is too small for device " 561 fs_err(sdp, "FS block size (%u) is too small for device "
266 "block size (%u)\n", 562 "block size (%u)\n",
267 sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev)); 563 sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
268 goto out; 564 goto out;
269 } 565 }
270 if (sdp->sd_sb.sb_bsize > PAGE_SIZE) { 566 if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
271 error = -EINVAL; 567 ret = -EINVAL;
272 fs_err(sdp, "FS block size (%u) is too big for machine " 568 fs_err(sdp, "FS block size (%u) is too big for machine "
273 "page size (%u)\n", 569 "page size (%u)\n",
274 sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE); 570 sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
@@ -278,26 +574,21 @@ static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
278 574
279 /* Get the root inode */ 575 /* Get the root inode */
280 no_addr = sdp->sd_sb.sb_root_dir.no_addr; 576 no_addr = sdp->sd_sb.sb_root_dir.no_addr;
281 if (sb->s_type == &gfs2meta_fs_type) 577 ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
282 no_addr = sdp->sd_sb.sb_master_dir.no_addr; 578 if (ret)
283 inode = gfs2_lookup_root(sb, no_addr);
284 if (IS_ERR(inode)) {
285 error = PTR_ERR(inode);
286 fs_err(sdp, "can't read in root inode: %d\n", error);
287 goto out; 579 goto out;
288 }
289 580
290 sb->s_root = d_alloc_root(inode); 581 /* Get the master inode */
291 if (!sb->s_root) { 582 no_addr = sdp->sd_sb.sb_master_dir.no_addr;
292 fs_err(sdp, "can't get root dentry\n"); 583 ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
293 error = -ENOMEM; 584 if (ret) {
294 iput(inode); 585 dput(sdp->sd_root_dir);
295 } else 586 goto out;
296 sb->s_root->d_op = &gfs2_dops; 587 }
297 588 sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
298out: 589out:
299 gfs2_glock_dq_uninit(&sb_gh); 590 gfs2_glock_dq_uninit(&sb_gh);
300 return error; 591 return ret;
301} 592}
302 593
303/** 594/**
@@ -372,6 +663,7 @@ static void gfs2_lm_others_may_mount(struct gfs2_sbd *sdp)
372 663
373static int init_journal(struct gfs2_sbd *sdp, int undo) 664static int init_journal(struct gfs2_sbd *sdp, int undo)
374{ 665{
666 struct inode *master = sdp->sd_master_dir->d_inode;
375 struct gfs2_holder ji_gh; 667 struct gfs2_holder ji_gh;
376 struct task_struct *p; 668 struct task_struct *p;
377 struct gfs2_inode *ip; 669 struct gfs2_inode *ip;
@@ -383,7 +675,7 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
383 goto fail_recoverd; 675 goto fail_recoverd;
384 } 676 }
385 677
386 sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex"); 678 sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
387 if (IS_ERR(sdp->sd_jindex)) { 679 if (IS_ERR(sdp->sd_jindex)) {
388 fs_err(sdp, "can't lookup journal index: %d\n", error); 680 fs_err(sdp, "can't lookup journal index: %d\n", error);
389 return PTR_ERR(sdp->sd_jindex); 681 return PTR_ERR(sdp->sd_jindex);
@@ -506,25 +798,17 @@ static int init_inodes(struct gfs2_sbd *sdp, int undo)
506{ 798{
507 int error = 0; 799 int error = 0;
508 struct gfs2_inode *ip; 800 struct gfs2_inode *ip;
509 struct inode *inode; 801 struct inode *master = sdp->sd_master_dir->d_inode;
510 802
511 if (undo) 803 if (undo)
512 goto fail_qinode; 804 goto fail_qinode;
513 805
514 inode = gfs2_lookup_root(sdp->sd_vfs, sdp->sd_sb.sb_master_dir.no_addr);
515 if (IS_ERR(inode)) {
516 error = PTR_ERR(inode);
517 fs_err(sdp, "can't read in master directory: %d\n", error);
518 goto fail;
519 }
520 sdp->sd_master_dir = inode;
521
522 error = init_journal(sdp, undo); 806 error = init_journal(sdp, undo);
523 if (error) 807 if (error)
524 goto fail_master; 808 goto fail;
525 809
526 /* Read in the master inode number inode */ 810 /* Read in the master inode number inode */
527 sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum"); 811 sdp->sd_inum_inode = gfs2_lookup_simple(master, "inum");
528 if (IS_ERR(sdp->sd_inum_inode)) { 812 if (IS_ERR(sdp->sd_inum_inode)) {
529 error = PTR_ERR(sdp->sd_inum_inode); 813 error = PTR_ERR(sdp->sd_inum_inode);
530 fs_err(sdp, "can't read in inum inode: %d\n", error); 814 fs_err(sdp, "can't read in inum inode: %d\n", error);
@@ -533,7 +817,7 @@ static int init_inodes(struct gfs2_sbd *sdp, int undo)
533 817
534 818
535 /* Read in the master statfs inode */ 819 /* Read in the master statfs inode */
536 sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs"); 820 sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
537 if (IS_ERR(sdp->sd_statfs_inode)) { 821 if (IS_ERR(sdp->sd_statfs_inode)) {
538 error = PTR_ERR(sdp->sd_statfs_inode); 822 error = PTR_ERR(sdp->sd_statfs_inode);
539 fs_err(sdp, "can't read in statfs inode: %d\n", error); 823 fs_err(sdp, "can't read in statfs inode: %d\n", error);
@@ -541,7 +825,7 @@ static int init_inodes(struct gfs2_sbd *sdp, int undo)
541 } 825 }
542 826
543 /* Read in the resource index inode */ 827 /* Read in the resource index inode */
544 sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex"); 828 sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
545 if (IS_ERR(sdp->sd_rindex)) { 829 if (IS_ERR(sdp->sd_rindex)) {
546 error = PTR_ERR(sdp->sd_rindex); 830 error = PTR_ERR(sdp->sd_rindex);
547 fs_err(sdp, "can't get resource index inode: %d\n", error); 831 fs_err(sdp, "can't get resource index inode: %d\n", error);
@@ -552,7 +836,7 @@ static int init_inodes(struct gfs2_sbd *sdp, int undo)
552 sdp->sd_rindex_uptodate = 0; 836 sdp->sd_rindex_uptodate = 0;
553 837
554 /* Read in the quota inode */ 838 /* Read in the quota inode */
555 sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota"); 839 sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
556 if (IS_ERR(sdp->sd_quota_inode)) { 840 if (IS_ERR(sdp->sd_quota_inode)) {
557 error = PTR_ERR(sdp->sd_quota_inode); 841 error = PTR_ERR(sdp->sd_quota_inode);
558 fs_err(sdp, "can't get quota file inode: %d\n", error); 842 fs_err(sdp, "can't get quota file inode: %d\n", error);
@@ -571,8 +855,6 @@ fail_inum:
571 iput(sdp->sd_inum_inode); 855 iput(sdp->sd_inum_inode);
572fail_journal: 856fail_journal:
573 init_journal(sdp, UNDO); 857 init_journal(sdp, UNDO);
574fail_master:
575 iput(sdp->sd_master_dir);
576fail: 858fail:
577 return error; 859 return error;
578} 860}
@@ -583,6 +865,7 @@ static int init_per_node(struct gfs2_sbd *sdp, int undo)
583 char buf[30]; 865 char buf[30];
584 int error = 0; 866 int error = 0;
585 struct gfs2_inode *ip; 867 struct gfs2_inode *ip;
868 struct inode *master = sdp->sd_master_dir->d_inode;
586 869
587 if (sdp->sd_args.ar_spectator) 870 if (sdp->sd_args.ar_spectator)
588 return 0; 871 return 0;
@@ -590,7 +873,7 @@ static int init_per_node(struct gfs2_sbd *sdp, int undo)
590 if (undo) 873 if (undo)
591 goto fail_qc_gh; 874 goto fail_qc_gh;
592 875
593 pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node"); 876 pn = gfs2_lookup_simple(master, "per_node");
594 if (IS_ERR(pn)) { 877 if (IS_ERR(pn)) {
595 error = PTR_ERR(pn); 878 error = PTR_ERR(pn);
596 fs_err(sdp, "can't find per_node directory: %d\n", error); 879 fs_err(sdp, "can't find per_node directory: %d\n", error);
@@ -800,7 +1083,11 @@ static int fill_super(struct super_block *sb, void *data, int silent)
800 goto fail; 1083 goto fail;
801 } 1084 }
802 1085
803 init_vfs(sb, SDF_NOATIME); 1086 sb->s_magic = GFS2_MAGIC;
1087 sb->s_op = &gfs2_super_ops;
1088 sb->s_export_op = &gfs2_export_ops;
1089 sb->s_time_gran = 1;
1090 sb->s_maxbytes = MAX_LFS_FILESIZE;
804 1091
805 /* Set up the buffer cache and fill in some fake block size values 1092 /* Set up the buffer cache and fill in some fake block size values
806 to allow us to read-in the on-disk superblock. */ 1093 to allow us to read-in the on-disk superblock. */
@@ -828,7 +1115,7 @@ static int fill_super(struct super_block *sb, void *data, int silent)
828 if (error) 1115 if (error)
829 goto fail_lm; 1116 goto fail_lm;
830 1117
831 error = init_sb(sdp, silent, DO); 1118 error = init_sb(sdp, silent);
832 if (error) 1119 if (error)
833 goto fail_locking; 1120 goto fail_locking;
834 1121
@@ -869,7 +1156,11 @@ fail_per_node:
869fail_inodes: 1156fail_inodes:
870 init_inodes(sdp, UNDO); 1157 init_inodes(sdp, UNDO);
871fail_sb: 1158fail_sb:
872 init_sb(sdp, 0, UNDO); 1159 if (sdp->sd_root_dir)
1160 dput(sdp->sd_root_dir);
1161 if (sdp->sd_master_dir)
1162 dput(sdp->sd_master_dir);
1163 sb->s_root = NULL;
873fail_locking: 1164fail_locking:
874 init_locking(sdp, &mount_gh, UNDO); 1165 init_locking(sdp, &mount_gh, UNDO);
875fail_lm: 1166fail_lm:
@@ -887,151 +1178,63 @@ fail:
887} 1178}
888 1179
889static int gfs2_get_sb(struct file_system_type *fs_type, int flags, 1180static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
890 const char *dev_name, void *data, struct vfsmount *mnt) 1181 const char *dev_name, void *data, struct vfsmount *mnt)
891{ 1182{
892 struct super_block *sb; 1183 return get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
893 struct gfs2_sbd *sdp;
894 int error = get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
895 if (error)
896 goto out;
897 sb = mnt->mnt_sb;
898 sdp = sb->s_fs_info;
899 sdp->sd_gfs2mnt = mnt;
900out:
901 return error;
902} 1184}
903 1185
904static int fill_super_meta(struct super_block *sb, struct super_block *new, 1186static struct super_block *get_gfs2_sb(const char *dev_name)
905 void *data, int silent)
906{ 1187{
907 struct gfs2_sbd *sdp = sb->s_fs_info; 1188 struct super_block *sb;
908 struct inode *inode;
909 int error = 0;
910
911 new->s_fs_info = sdp;
912 sdp->sd_vfs_meta = sb;
913
914 init_vfs(new, SDF_NOATIME);
915
916 /* Get the master inode */
917 inode = igrab(sdp->sd_master_dir);
918
919 new->s_root = d_alloc_root(inode);
920 if (!new->s_root) {
921 fs_err(sdp, "can't get root dentry\n");
922 error = -ENOMEM;
923 iput(inode);
924 } else
925 new->s_root->d_op = &gfs2_dops;
926
927 return error;
928}
929
930static int set_bdev_super(struct super_block *s, void *data)
931{
932 s->s_bdev = data;
933 s->s_dev = s->s_bdev->bd_dev;
934 return 0;
935}
936
937static int test_bdev_super(struct super_block *s, void *data)
938{
939 return s->s_bdev == data;
940}
941
942static struct super_block* get_gfs2_sb(const char *dev_name)
943{
944 struct kstat stat;
945 struct nameidata nd; 1189 struct nameidata nd;
946 struct super_block *sb = NULL, *s;
947 int error; 1190 int error;
948 1191
949 error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd); 1192 error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd);
950 if (error) { 1193 if (error) {
951 printk(KERN_WARNING "GFS2: path_lookup on %s returned error\n", 1194 printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
952 dev_name); 1195 dev_name, error);
953 goto out; 1196 return NULL;
954 }
955 error = vfs_getattr(nd.path.mnt, nd.path.dentry, &stat);
956
957 list_for_each_entry(s, &gfs2_fs_type.fs_supers, s_instances) {
958 if ((S_ISBLK(stat.mode) && s->s_dev == stat.rdev) ||
959 (S_ISDIR(stat.mode) &&
960 s == nd.path.dentry->d_inode->i_sb)) {
961 sb = s;
962 goto free_nd;
963 }
964 } 1197 }
965 1198 sb = nd.path.dentry->d_inode->i_sb;
966 printk(KERN_WARNING "GFS2: Unrecognized block device or " 1199 if (sb && (sb->s_type == &gfs2_fs_type))
967 "mount point %s\n", dev_name); 1200 atomic_inc(&sb->s_active);
968 1201 else
969free_nd: 1202 sb = NULL;
970 path_put(&nd.path); 1203 path_put(&nd.path);
971out:
972 return sb; 1204 return sb;
973} 1205}
974 1206
975static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags, 1207static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
976 const char *dev_name, void *data, struct vfsmount *mnt) 1208 const char *dev_name, void *data, struct vfsmount *mnt)
977{ 1209{
978 int error = 0; 1210 struct super_block *sb = NULL;
979 struct super_block *sb = NULL, *new;
980 struct gfs2_sbd *sdp; 1211 struct gfs2_sbd *sdp;
981 1212
982 sb = get_gfs2_sb(dev_name); 1213 sb = get_gfs2_sb(dev_name);
983 if (!sb) { 1214 if (!sb) {
984 printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n"); 1215 printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
985 error = -ENOENT; 1216 return -ENOENT;
986 goto error;
987 } 1217 }
988 sdp = sb->s_fs_info; 1218 sdp = sb->s_fs_info;
989 if (sdp->sd_vfs_meta) { 1219 mnt->mnt_sb = sb;
990 printk(KERN_WARNING "GFS2: gfs2meta mount already exists\n"); 1220 mnt->mnt_root = dget(sdp->sd_master_dir);
991 error = -EBUSY; 1221 return 0;
992 goto error;
993 }
994 down(&sb->s_bdev->bd_mount_sem);
995 new = sget(fs_type, test_bdev_super, set_bdev_super, sb->s_bdev);
996 up(&sb->s_bdev->bd_mount_sem);
997 if (IS_ERR(new)) {
998 error = PTR_ERR(new);
999 goto error;
1000 }
1001 new->s_flags = flags;
1002 strlcpy(new->s_id, sb->s_id, sizeof(new->s_id));
1003 sb_set_blocksize(new, sb->s_blocksize);
1004 error = fill_super_meta(sb, new, data, flags & MS_SILENT ? 1 : 0);
1005 if (error) {
1006 up_write(&new->s_umount);
1007 deactivate_super(new);
1008 goto error;
1009 }
1010
1011 new->s_flags |= MS_ACTIVE;
1012
1013 /* Grab a reference to the gfs2 mount point */
1014 atomic_inc(&sdp->sd_gfs2mnt->mnt_count);
1015 return simple_set_mnt(mnt, new);
1016error:
1017 return error;
1018} 1222}
1019 1223
1020static void gfs2_kill_sb(struct super_block *sb) 1224static void gfs2_kill_sb(struct super_block *sb)
1021{ 1225{
1022 if (sb->s_fs_info) { 1226 struct gfs2_sbd *sdp = sb->s_fs_info;
1023 gfs2_delete_debugfs_file(sb->s_fs_info); 1227 if (sdp) {
1024 gfs2_meta_syncfs(sb->s_fs_info); 1228 gfs2_meta_syncfs(sdp);
1229 dput(sdp->sd_root_dir);
1230 dput(sdp->sd_master_dir);
1231 sdp->sd_root_dir = NULL;
1232 sdp->sd_master_dir = NULL;
1025 } 1233 }
1234 shrink_dcache_sb(sb);
1026 kill_block_super(sb); 1235 kill_block_super(sb);
1027} 1236 if (sdp)
1028 1237 gfs2_delete_debugfs_file(sdp);
1029static void gfs2_kill_sb_meta(struct super_block *sb)
1030{
1031 struct gfs2_sbd *sdp = sb->s_fs_info;
1032 generic_shutdown_super(sb);
1033 sdp->sd_vfs_meta = NULL;
1034 atomic_dec(&sdp->sd_gfs2mnt->mnt_count);
1035} 1238}
1036 1239
1037struct file_system_type gfs2_fs_type = { 1240struct file_system_type gfs2_fs_type = {
@@ -1046,7 +1249,6 @@ struct file_system_type gfs2meta_fs_type = {
1046 .name = "gfs2meta", 1249 .name = "gfs2meta",
1047 .fs_flags = FS_REQUIRES_DEV, 1250 .fs_flags = FS_REQUIRES_DEV,
1048 .get_sb = gfs2_get_sb_meta, 1251 .get_sb = gfs2_get_sb_meta,
1049 .kill_sb = gfs2_kill_sb_meta,
1050 .owner = THIS_MODULE, 1252 .owner = THIS_MODULE,
1051}; 1253};
1052 1254
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index e2c62f73a778..534e1e2c65ca 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -159,9 +159,13 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
159 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 159 gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
160 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 160 gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
161 161
162 error = gfs2_glock_nq_m(2, ghs); 162 error = gfs2_glock_nq(ghs); /* parent */
163 if (error) 163 if (error)
164 goto out; 164 goto out_parent;
165
166 error = gfs2_glock_nq(ghs + 1); /* child */
167 if (error)
168 goto out_child;
165 169
166 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 170 error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
167 if (error) 171 if (error)
@@ -245,8 +249,10 @@ out_alloc:
245 if (alloc_required) 249 if (alloc_required)
246 gfs2_alloc_put(dip); 250 gfs2_alloc_put(dip);
247out_gunlock: 251out_gunlock:
248 gfs2_glock_dq_m(2, ghs); 252 gfs2_glock_dq(ghs + 1);
249out: 253out_child:
254 gfs2_glock_dq(ghs);
255out_parent:
250 gfs2_holder_uninit(ghs); 256 gfs2_holder_uninit(ghs);
251 gfs2_holder_uninit(ghs + 1); 257 gfs2_holder_uninit(ghs + 1);
252 if (!error) { 258 if (!error) {
@@ -302,7 +308,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
302 308
303 error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 309 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
304 if (error) 310 if (error)
305 goto out_rgrp; 311 goto out_gunlock;
306 312
307 error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0); 313 error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0);
308 if (error) 314 if (error)
@@ -316,6 +322,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
316 322
317out_end_trans: 323out_end_trans:
318 gfs2_trans_end(sdp); 324 gfs2_trans_end(sdp);
325out_gunlock:
319 gfs2_glock_dq(ghs + 2); 326 gfs2_glock_dq(ghs + 2);
320out_rgrp: 327out_rgrp:
321 gfs2_holder_uninit(ghs + 2); 328 gfs2_holder_uninit(ghs + 2);
@@ -485,7 +492,6 @@ static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
485 struct gfs2_holder ri_gh; 492 struct gfs2_holder ri_gh;
486 int error; 493 int error;
487 494
488
489 error = gfs2_rindex_hold(sdp, &ri_gh); 495 error = gfs2_rindex_hold(sdp, &ri_gh);
490 if (error) 496 if (error)
491 return error; 497 return error;
@@ -495,9 +501,17 @@ static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
495 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); 501 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
496 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 502 gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
497 503
498 error = gfs2_glock_nq_m(3, ghs); 504 error = gfs2_glock_nq(ghs); /* parent */
499 if (error) 505 if (error)
500 goto out; 506 goto out_parent;
507
508 error = gfs2_glock_nq(ghs + 1); /* child */
509 if (error)
510 goto out_child;
511
512 error = gfs2_glock_nq(ghs + 2); /* rgrp */
513 if (error)
514 goto out_rgrp;
501 515
502 error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 516 error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
503 if (error) 517 if (error)
@@ -523,11 +537,15 @@ static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
523 gfs2_trans_end(sdp); 537 gfs2_trans_end(sdp);
524 538
525out_gunlock: 539out_gunlock:
526 gfs2_glock_dq_m(3, ghs); 540 gfs2_glock_dq(ghs + 2);
527out: 541out_rgrp:
528 gfs2_holder_uninit(ghs);
529 gfs2_holder_uninit(ghs + 1);
530 gfs2_holder_uninit(ghs + 2); 542 gfs2_holder_uninit(ghs + 2);
543 gfs2_glock_dq(ghs + 1);
544out_child:
545 gfs2_holder_uninit(ghs + 1);
546 gfs2_glock_dq(ghs);
547out_parent:
548 gfs2_holder_uninit(ghs);
531 gfs2_glock_dq_uninit(&ri_gh); 549 gfs2_glock_dq_uninit(&ri_gh);
532 return error; 550 return error;
533} 551}
@@ -571,6 +589,54 @@ static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode,
571 return 0; 589 return 0;
572} 590}
573 591
592/*
593 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
594 * @this: move this
595 * @to: to here
596 *
597 * Follow @to back to the root and make sure we don't encounter @this
598 * Assumes we already hold the rename lock.
599 *
600 * Returns: errno
601 */
602
603static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
604{
605 struct inode *dir = &to->i_inode;
606 struct super_block *sb = dir->i_sb;
607 struct inode *tmp;
608 struct qstr dotdot;
609 int error = 0;
610
611 gfs2_str2qstr(&dotdot, "..");
612
613 igrab(dir);
614
615 for (;;) {
616 if (dir == &this->i_inode) {
617 error = -EINVAL;
618 break;
619 }
620 if (dir == sb->s_root->d_inode) {
621 error = 0;
622 break;
623 }
624
625 tmp = gfs2_lookupi(dir, &dotdot, 1);
626 if (IS_ERR(tmp)) {
627 error = PTR_ERR(tmp);
628 break;
629 }
630
631 iput(dir);
632 dir = tmp;
633 }
634
635 iput(dir);
636
637 return error;
638}
639
574/** 640/**
575 * gfs2_rename - Rename a file 641 * gfs2_rename - Rename a file
576 * @odir: Parent directory of old file name 642 * @odir: Parent directory of old file name
@@ -589,7 +655,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
589 struct gfs2_inode *ip = GFS2_I(odentry->d_inode); 655 struct gfs2_inode *ip = GFS2_I(odentry->d_inode);
590 struct gfs2_inode *nip = NULL; 656 struct gfs2_inode *nip = NULL;
591 struct gfs2_sbd *sdp = GFS2_SB(odir); 657 struct gfs2_sbd *sdp = GFS2_SB(odir);
592 struct gfs2_holder ghs[5], r_gh; 658 struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
593 struct gfs2_rgrpd *nrgd; 659 struct gfs2_rgrpd *nrgd;
594 unsigned int num_gh; 660 unsigned int num_gh;
595 int dir_rename = 0; 661 int dir_rename = 0;
@@ -603,19 +669,20 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
603 return 0; 669 return 0;
604 } 670 }
605 671
606 /* Make sure we aren't trying to move a dirctory into it's subdir */
607
608 if (S_ISDIR(ip->i_inode.i_mode) && odip != ndip) {
609 dir_rename = 1;
610 672
611 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 0, 673 if (odip != ndip) {
612 &r_gh); 674 error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
675 0, &r_gh);
613 if (error) 676 if (error)
614 goto out; 677 goto out;
615 678
616 error = gfs2_ok_to_move(ip, ndip); 679 if (S_ISDIR(ip->i_inode.i_mode)) {
617 if (error) 680 dir_rename = 1;
618 goto out_gunlock_r; 681 /* don't move a dirctory into it's subdir */
682 error = gfs2_ok_to_move(ip, ndip);
683 if (error)
684 goto out_gunlock_r;
685 }
619 } 686 }
620 687
621 num_gh = 1; 688 num_gh = 1;
@@ -639,9 +706,11 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
639 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); 706 gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
640 } 707 }
641 708
642 error = gfs2_glock_nq_m(num_gh, ghs); 709 for (x = 0; x < num_gh; x++) {
643 if (error) 710 error = gfs2_glock_nq(ghs + x);
644 goto out_uninit; 711 if (error)
712 goto out_gunlock;
713 }
645 714
646 /* Check out the old directory */ 715 /* Check out the old directory */
647 716
@@ -804,12 +873,12 @@ out_alloc:
804 if (alloc_required) 873 if (alloc_required)
805 gfs2_alloc_put(ndip); 874 gfs2_alloc_put(ndip);
806out_gunlock: 875out_gunlock:
807 gfs2_glock_dq_m(num_gh, ghs); 876 while (x--) {
808out_uninit: 877 gfs2_glock_dq(ghs + x);
809 for (x = 0; x < num_gh; x++)
810 gfs2_holder_uninit(ghs + x); 878 gfs2_holder_uninit(ghs + x);
879 }
811out_gunlock_r: 880out_gunlock_r:
812 if (dir_rename) 881 if (r_gh.gh_gl)
813 gfs2_glock_dq_uninit(&r_gh); 882 gfs2_glock_dq_uninit(&r_gh);
814out: 883out:
815 return error; 884 return error;
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
index f66ea0f7a356..d5355d9b5926 100644
--- a/fs/gfs2/ops_super.c
+++ b/fs/gfs2/ops_super.c
@@ -20,6 +20,7 @@
20#include <linux/gfs2_ondisk.h> 20#include <linux/gfs2_ondisk.h>
21#include <linux/crc32.h> 21#include <linux/crc32.h>
22#include <linux/lm_interface.h> 22#include <linux/lm_interface.h>
23#include <linux/time.h>
23 24
24#include "gfs2.h" 25#include "gfs2.h"
25#include "incore.h" 26#include "incore.h"
@@ -38,6 +39,7 @@
38#include "dir.h" 39#include "dir.h"
39#include "eattr.h" 40#include "eattr.h"
40#include "bmap.h" 41#include "bmap.h"
42#include "meta_io.h"
41 43
42/** 44/**
43 * gfs2_write_inode - Make sure the inode is stable on the disk 45 * gfs2_write_inode - Make sure the inode is stable on the disk
@@ -50,16 +52,74 @@
50static int gfs2_write_inode(struct inode *inode, int sync) 52static int gfs2_write_inode(struct inode *inode, int sync)
51{ 53{
52 struct gfs2_inode *ip = GFS2_I(inode); 54 struct gfs2_inode *ip = GFS2_I(inode);
53 55 struct gfs2_sbd *sdp = GFS2_SB(inode);
54 /* Check this is a "normal" inode */ 56 struct gfs2_holder gh;
55 if (test_bit(GIF_USER, &ip->i_flags)) { 57 struct buffer_head *bh;
56 if (current->flags & PF_MEMALLOC) 58 struct timespec atime;
57 return 0; 59 struct gfs2_dinode *di;
58 if (sync) 60 int ret = 0;
59 gfs2_log_flush(GFS2_SB(inode), ip->i_gl); 61
62 /* Check this is a "normal" inode, etc */
63 if (!test_bit(GIF_USER, &ip->i_flags) ||
64 (current->flags & PF_MEMALLOC))
65 return 0;
66 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
67 if (ret)
68 goto do_flush;
69 ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
70 if (ret)
71 goto do_unlock;
72 ret = gfs2_meta_inode_buffer(ip, &bh);
73 if (ret == 0) {
74 di = (struct gfs2_dinode *)bh->b_data;
75 atime.tv_sec = be64_to_cpu(di->di_atime);
76 atime.tv_nsec = be32_to_cpu(di->di_atime_nsec);
77 if (timespec_compare(&inode->i_atime, &atime) > 0) {
78 gfs2_trans_add_bh(ip->i_gl, bh, 1);
79 gfs2_dinode_out(ip, bh->b_data);
80 }
81 brelse(bh);
60 } 82 }
83 gfs2_trans_end(sdp);
84do_unlock:
85 gfs2_glock_dq_uninit(&gh);
86do_flush:
87 if (sync != 0)
88 gfs2_log_flush(GFS2_SB(inode), ip->i_gl);
89 return ret;
90}
61 91
62 return 0; 92/**
93 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
94 * @sdp: the filesystem
95 *
96 * Returns: errno
97 */
98
99static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
100{
101 struct gfs2_holder t_gh;
102 int error;
103
104 gfs2_quota_sync(sdp);
105 gfs2_statfs_sync(sdp);
106
107 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,
108 &t_gh);
109 if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
110 return error;
111
112 gfs2_meta_syncfs(sdp);
113 gfs2_log_shutdown(sdp);
114
115 clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
116
117 if (t_gh.gh_gl)
118 gfs2_glock_dq_uninit(&t_gh);
119
120 gfs2_quota_cleanup(sdp);
121
122 return error;
63} 123}
64 124
65/** 125/**
@@ -73,12 +133,6 @@ static void gfs2_put_super(struct super_block *sb)
73 struct gfs2_sbd *sdp = sb->s_fs_info; 133 struct gfs2_sbd *sdp = sb->s_fs_info;
74 int error; 134 int error;
75 135
76 if (!sdp)
77 return;
78
79 if (!strncmp(sb->s_type->name, "gfs2meta", 8))
80 return; /* Nothing to do */
81
82 /* Unfreeze the filesystem, if we need to */ 136 /* Unfreeze the filesystem, if we need to */
83 137
84 mutex_lock(&sdp->sd_freeze_lock); 138 mutex_lock(&sdp->sd_freeze_lock);
@@ -101,7 +155,6 @@ static void gfs2_put_super(struct super_block *sb)
101 155
102 /* Release stuff */ 156 /* Release stuff */
103 157
104 iput(sdp->sd_master_dir);
105 iput(sdp->sd_jindex); 158 iput(sdp->sd_jindex);
106 iput(sdp->sd_inum_inode); 159 iput(sdp->sd_inum_inode);
107 iput(sdp->sd_statfs_inode); 160 iput(sdp->sd_statfs_inode);
@@ -152,6 +205,7 @@ static void gfs2_write_super(struct super_block *sb)
152 * 205 *
153 * Flushes the log to disk. 206 * Flushes the log to disk.
154 */ 207 */
208
155static int gfs2_sync_fs(struct super_block *sb, int wait) 209static int gfs2_sync_fs(struct super_block *sb, int wait)
156{ 210{
157 sb->s_dirt = 0; 211 sb->s_dirt = 0;
@@ -270,14 +324,6 @@ static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
270 } 324 }
271 } 325 }
272 326
273 if (*flags & (MS_NOATIME | MS_NODIRATIME))
274 set_bit(SDF_NOATIME, &sdp->sd_flags);
275 else
276 clear_bit(SDF_NOATIME, &sdp->sd_flags);
277
278 /* Don't let the VFS update atimes. GFS2 handles this itself. */
279 *flags |= MS_NOATIME | MS_NODIRATIME;
280
281 return error; 327 return error;
282} 328}
283 329
@@ -295,6 +341,7 @@ static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
295 * inode's blocks, or alternatively pass the baton on to another 341 * inode's blocks, or alternatively pass the baton on to another
296 * node for later deallocation. 342 * node for later deallocation.
297 */ 343 */
344
298static void gfs2_drop_inode(struct inode *inode) 345static void gfs2_drop_inode(struct inode *inode)
299{ 346{
300 struct gfs2_inode *ip = GFS2_I(inode); 347 struct gfs2_inode *ip = GFS2_I(inode);
@@ -333,6 +380,16 @@ static void gfs2_clear_inode(struct inode *inode)
333 } 380 }
334} 381}
335 382
383static int is_ancestor(const struct dentry *d1, const struct dentry *d2)
384{
385 do {
386 if (d1 == d2)
387 return 1;
388 d1 = d1->d_parent;
389 } while (!IS_ROOT(d1));
390 return 0;
391}
392
336/** 393/**
337 * gfs2_show_options - Show mount options for /proc/mounts 394 * gfs2_show_options - Show mount options for /proc/mounts
338 * @s: seq_file structure 395 * @s: seq_file structure
@@ -346,6 +403,8 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
346 struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; 403 struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info;
347 struct gfs2_args *args = &sdp->sd_args; 404 struct gfs2_args *args = &sdp->sd_args;
348 405
406 if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir))
407 seq_printf(s, ",meta");
349 if (args->ar_lockproto[0]) 408 if (args->ar_lockproto[0])
350 seq_printf(s, ",lockproto=%s", args->ar_lockproto); 409 seq_printf(s, ",lockproto=%s", args->ar_lockproto);
351 if (args->ar_locktable[0]) 410 if (args->ar_locktable[0])
@@ -414,6 +473,7 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
414 * conversion on the iopen lock, but we can change that later. This 473 * conversion on the iopen lock, but we can change that later. This
415 * is safe, just less efficient. 474 * is safe, just less efficient.
416 */ 475 */
476
417static void gfs2_delete_inode(struct inode *inode) 477static void gfs2_delete_inode(struct inode *inode)
418{ 478{
419 struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; 479 struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
@@ -478,8 +538,6 @@ out:
478 clear_inode(inode); 538 clear_inode(inode);
479} 539}
480 540
481
482
483static struct inode *gfs2_alloc_inode(struct super_block *sb) 541static struct inode *gfs2_alloc_inode(struct super_block *sb)
484{ 542{
485 struct gfs2_inode *ip; 543 struct gfs2_inode *ip;
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;
diff --git a/fs/gfs2/super.h b/fs/gfs2/super.h
index 44361ecc44f7..50a4c9b1215e 100644
--- a/fs/gfs2/super.h
+++ b/fs/gfs2/super.h
@@ -12,11 +12,6 @@
12 12
13#include "incore.h" 13#include "incore.h"
14 14
15void gfs2_tune_init(struct gfs2_tune *gt);
16
17int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent);
18int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent);
19int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector);
20void gfs2_lm_unmount(struct gfs2_sbd *sdp); 15void gfs2_lm_unmount(struct gfs2_sbd *sdp);
21 16
22static inline unsigned int gfs2_jindex_size(struct gfs2_sbd *sdp) 17static inline unsigned int gfs2_jindex_size(struct gfs2_sbd *sdp)
@@ -40,7 +35,6 @@ int gfs2_lookup_in_master_dir(struct gfs2_sbd *sdp, char *filename,
40 struct gfs2_inode **ipp); 35 struct gfs2_inode **ipp);
41 36
42int gfs2_make_fs_rw(struct gfs2_sbd *sdp); 37int gfs2_make_fs_rw(struct gfs2_sbd *sdp);
43int gfs2_make_fs_ro(struct gfs2_sbd *sdp);
44 38
45int gfs2_statfs_init(struct gfs2_sbd *sdp); 39int gfs2_statfs_init(struct gfs2_sbd *sdp);
46void gfs2_statfs_change(struct gfs2_sbd *sdp, 40void gfs2_statfs_change(struct gfs2_sbd *sdp,
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 74846559fc3f..7e1879f1a02c 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -269,14 +269,6 @@ ARGS_ATTR(quota, "%u\n");
269ARGS_ATTR(suiddir, "%d\n"); 269ARGS_ATTR(suiddir, "%d\n");
270ARGS_ATTR(data, "%d\n"); 270ARGS_ATTR(data, "%d\n");
271 271
272/* one oddball doesn't fit the macro mold */
273static ssize_t noatime_show(struct gfs2_sbd *sdp, char *buf)
274{
275 return snprintf(buf, PAGE_SIZE, "%d\n",
276 !!test_bit(SDF_NOATIME, &sdp->sd_flags));
277}
278static struct args_attr args_attr_noatime = __ATTR_RO(noatime);
279
280static struct attribute *args_attrs[] = { 272static struct attribute *args_attrs[] = {
281 &args_attr_lockproto.attr, 273 &args_attr_lockproto.attr,
282 &args_attr_locktable.attr, 274 &args_attr_locktable.attr,
@@ -292,7 +284,6 @@ static struct attribute *args_attrs[] = {
292 &args_attr_quota.attr, 284 &args_attr_quota.attr,
293 &args_attr_suiddir.attr, 285 &args_attr_suiddir.attr,
294 &args_attr_data.attr, 286 &args_attr_data.attr,
295 &args_attr_noatime.attr,
296 NULL, 287 NULL,
297}; 288};
298 289
@@ -407,7 +398,6 @@ TUNE_ATTR(incore_log_blocks, 0);
407TUNE_ATTR(log_flush_secs, 0); 398TUNE_ATTR(log_flush_secs, 0);
408TUNE_ATTR(quota_warn_period, 0); 399TUNE_ATTR(quota_warn_period, 0);
409TUNE_ATTR(quota_quantum, 0); 400TUNE_ATTR(quota_quantum, 0);
410TUNE_ATTR(atime_quantum, 0);
411TUNE_ATTR(max_readahead, 0); 401TUNE_ATTR(max_readahead, 0);
412TUNE_ATTR(complain_secs, 0); 402TUNE_ATTR(complain_secs, 0);
413TUNE_ATTR(statfs_slow, 0); 403TUNE_ATTR(statfs_slow, 0);
@@ -427,7 +417,6 @@ static struct attribute *tune_attrs[] = {
427 &tune_attr_log_flush_secs.attr, 417 &tune_attr_log_flush_secs.attr,
428 &tune_attr_quota_warn_period.attr, 418 &tune_attr_quota_warn_period.attr,
429 &tune_attr_quota_quantum.attr, 419 &tune_attr_quota_quantum.attr,
430 &tune_attr_atime_quantum.attr,
431 &tune_attr_max_readahead.attr, 420 &tune_attr_max_readahead.attr,
432 &tune_attr_complain_secs.attr, 421 &tune_attr_complain_secs.attr,
433 &tune_attr_statfs_slow.attr, 422 &tune_attr_statfs_slow.attr,
diff --git a/include/linux/gfs2_ondisk.h b/include/linux/gfs2_ondisk.h
index c3c19f926e6f..14d0df0b5749 100644
--- a/include/linux/gfs2_ondisk.h
+++ b/include/linux/gfs2_ondisk.h
@@ -118,7 +118,11 @@ struct gfs2_sb {
118 118
119 char sb_lockproto[GFS2_LOCKNAME_LEN]; 119 char sb_lockproto[GFS2_LOCKNAME_LEN];
120 char sb_locktable[GFS2_LOCKNAME_LEN]; 120 char sb_locktable[GFS2_LOCKNAME_LEN];
121 /* In gfs1, quota and license dinodes followed */ 121
122 struct gfs2_inum __pad3; /* Was quota inode in gfs1 */
123 struct gfs2_inum __pad4; /* Was licence inode in gfs1 */
124#define GFS2_HAS_UUID 1
125 __u8 sb_uuid[16]; /* The UUID, maybe 0 for backwards compat */
122}; 126};
123 127
124/* 128/*
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-19 12:35:11 -0500