1b3b94faaSDavid Teigland /* 2b3b94faaSDavid Teigland * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3da6dd40dSBob Peterson * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. 4b3b94faaSDavid Teigland * 5b3b94faaSDavid Teigland * This copyrighted material is made available to anyone wishing to use, 6b3b94faaSDavid Teigland * modify, copy, or redistribute it subject to the terms and conditions 7e9fc2aa0SSteven Whitehouse * of the GNU General Public License version 2. 8b3b94faaSDavid Teigland */ 9b3b94faaSDavid Teigland 109e6e0a12SSteven Whitehouse #include <linux/bio.h> 11b3b94faaSDavid Teigland #include <linux/sched.h> 12b3b94faaSDavid Teigland #include <linux/slab.h> 13b3b94faaSDavid Teigland #include <linux/spinlock.h> 14b3b94faaSDavid Teigland #include <linux/completion.h> 15b3b94faaSDavid Teigland #include <linux/buffer_head.h> 169e6e0a12SSteven Whitehouse #include <linux/statfs.h> 179e6e0a12SSteven Whitehouse #include <linux/seq_file.h> 189e6e0a12SSteven Whitehouse #include <linux/mount.h> 199e6e0a12SSteven Whitehouse #include <linux/kthread.h> 209e6e0a12SSteven Whitehouse #include <linux/delay.h> 215c676f6dSSteven Whitehouse #include <linux/gfs2_ondisk.h> 229e6e0a12SSteven Whitehouse #include <linux/crc32.h> 239e6e0a12SSteven Whitehouse #include <linux/time.h> 24b3b94faaSDavid Teigland 25b3b94faaSDavid Teigland #include "gfs2.h" 265c676f6dSSteven Whitehouse #include "incore.h" 27b3b94faaSDavid Teigland #include "bmap.h" 28b3b94faaSDavid Teigland #include "dir.h" 29b3b94faaSDavid Teigland #include "glock.h" 30b3b94faaSDavid Teigland #include "glops.h" 31b3b94faaSDavid Teigland #include "inode.h" 32b3b94faaSDavid Teigland #include "log.h" 33b3b94faaSDavid Teigland #include "meta_io.h" 34b3b94faaSDavid Teigland #include "quota.h" 35b3b94faaSDavid Teigland #include "recovery.h" 36b3b94faaSDavid Teigland #include "rgrp.h" 37b3b94faaSDavid Teigland #include "super.h" 38b3b94faaSDavid Teigland #include "trans.h" 395c676f6dSSteven Whitehouse #include "util.h" 409e6e0a12SSteven Whitehouse #include "sys.h" 41307cf6e6SSteven Whitehouse #include "xattr.h" 429e6e0a12SSteven Whitehouse 439e6e0a12SSteven Whitehouse #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) 449e6e0a12SSteven Whitehouse 459e6e0a12SSteven Whitehouse enum { 469e6e0a12SSteven Whitehouse Opt_lockproto, 479e6e0a12SSteven Whitehouse Opt_locktable, 489e6e0a12SSteven Whitehouse Opt_hostdata, 499e6e0a12SSteven Whitehouse Opt_spectator, 509e6e0a12SSteven Whitehouse Opt_ignore_local_fs, 519e6e0a12SSteven Whitehouse Opt_localflocks, 529e6e0a12SSteven Whitehouse Opt_localcaching, 539e6e0a12SSteven Whitehouse Opt_debug, 549e6e0a12SSteven Whitehouse Opt_nodebug, 559e6e0a12SSteven Whitehouse Opt_upgrade, 569e6e0a12SSteven Whitehouse Opt_acl, 579e6e0a12SSteven Whitehouse Opt_noacl, 589e6e0a12SSteven Whitehouse Opt_quota_off, 599e6e0a12SSteven Whitehouse Opt_quota_account, 609e6e0a12SSteven Whitehouse Opt_quota_on, 619e6e0a12SSteven Whitehouse Opt_quota, 629e6e0a12SSteven Whitehouse Opt_noquota, 639e6e0a12SSteven Whitehouse Opt_suiddir, 649e6e0a12SSteven Whitehouse Opt_nosuiddir, 659e6e0a12SSteven Whitehouse Opt_data_writeback, 669e6e0a12SSteven Whitehouse Opt_data_ordered, 679e6e0a12SSteven Whitehouse Opt_meta, 689e6e0a12SSteven Whitehouse Opt_discard, 699e6e0a12SSteven Whitehouse Opt_nodiscard, 709e6e0a12SSteven Whitehouse Opt_commit, 71d34843d0SBob Peterson Opt_err_withdraw, 72d34843d0SBob Peterson Opt_err_panic, 739e6e0a12SSteven Whitehouse Opt_error, 749e6e0a12SSteven Whitehouse }; 759e6e0a12SSteven Whitehouse 769e6e0a12SSteven Whitehouse static const match_table_t tokens = { 779e6e0a12SSteven Whitehouse {Opt_lockproto, "lockproto=%s"}, 789e6e0a12SSteven Whitehouse {Opt_locktable, "locktable=%s"}, 799e6e0a12SSteven Whitehouse {Opt_hostdata, "hostdata=%s"}, 809e6e0a12SSteven Whitehouse {Opt_spectator, "spectator"}, 819e6e0a12SSteven Whitehouse {Opt_ignore_local_fs, "ignore_local_fs"}, 829e6e0a12SSteven Whitehouse {Opt_localflocks, "localflocks"}, 839e6e0a12SSteven Whitehouse {Opt_localcaching, "localcaching"}, 849e6e0a12SSteven Whitehouse {Opt_debug, "debug"}, 859e6e0a12SSteven Whitehouse {Opt_nodebug, "nodebug"}, 869e6e0a12SSteven Whitehouse {Opt_upgrade, "upgrade"}, 879e6e0a12SSteven Whitehouse {Opt_acl, "acl"}, 889e6e0a12SSteven Whitehouse {Opt_noacl, "noacl"}, 899e6e0a12SSteven Whitehouse {Opt_quota_off, "quota=off"}, 909e6e0a12SSteven Whitehouse {Opt_quota_account, "quota=account"}, 919e6e0a12SSteven Whitehouse {Opt_quota_on, "quota=on"}, 929e6e0a12SSteven Whitehouse {Opt_quota, "quota"}, 939e6e0a12SSteven Whitehouse {Opt_noquota, "noquota"}, 949e6e0a12SSteven Whitehouse {Opt_suiddir, "suiddir"}, 959e6e0a12SSteven Whitehouse {Opt_nosuiddir, "nosuiddir"}, 969e6e0a12SSteven Whitehouse {Opt_data_writeback, "data=writeback"}, 979e6e0a12SSteven Whitehouse {Opt_data_ordered, "data=ordered"}, 989e6e0a12SSteven Whitehouse {Opt_meta, "meta"}, 999e6e0a12SSteven Whitehouse {Opt_discard, "discard"}, 1009e6e0a12SSteven Whitehouse {Opt_nodiscard, "nodiscard"}, 1019e6e0a12SSteven Whitehouse {Opt_commit, "commit=%d"}, 102d34843d0SBob Peterson {Opt_err_withdraw, "errors=withdraw"}, 103d34843d0SBob Peterson {Opt_err_panic, "errors=panic"}, 1049e6e0a12SSteven Whitehouse {Opt_error, NULL} 1059e6e0a12SSteven Whitehouse }; 1069e6e0a12SSteven Whitehouse 1079e6e0a12SSteven Whitehouse /** 1089e6e0a12SSteven Whitehouse * gfs2_mount_args - Parse mount options 109f55073ffSSteven Whitehouse * @args: The structure into which the parsed options will be written 110f55073ffSSteven Whitehouse * @options: The options to parse 1119e6e0a12SSteven Whitehouse * 1129e6e0a12SSteven Whitehouse * Return: errno 1139e6e0a12SSteven Whitehouse */ 1149e6e0a12SSteven Whitehouse 115f55073ffSSteven Whitehouse int gfs2_mount_args(struct gfs2_args *args, char *options) 1169e6e0a12SSteven Whitehouse { 1179e6e0a12SSteven Whitehouse char *o; 1189e6e0a12SSteven Whitehouse int token; 1199e6e0a12SSteven Whitehouse substring_t tmp[MAX_OPT_ARGS]; 1209e6e0a12SSteven Whitehouse int rv; 1219e6e0a12SSteven Whitehouse 1229e6e0a12SSteven Whitehouse /* Split the options into tokens with the "," character and 1239e6e0a12SSteven Whitehouse process them */ 1249e6e0a12SSteven Whitehouse 1259e6e0a12SSteven Whitehouse while (1) { 1269e6e0a12SSteven Whitehouse o = strsep(&options, ","); 1279e6e0a12SSteven Whitehouse if (o == NULL) 1289e6e0a12SSteven Whitehouse break; 1299e6e0a12SSteven Whitehouse if (*o == '\0') 1309e6e0a12SSteven Whitehouse continue; 1319e6e0a12SSteven Whitehouse 1329e6e0a12SSteven Whitehouse token = match_token(o, tokens, tmp); 1339e6e0a12SSteven Whitehouse switch (token) { 1349e6e0a12SSteven Whitehouse case Opt_lockproto: 1359e6e0a12SSteven Whitehouse match_strlcpy(args->ar_lockproto, &tmp[0], 1369e6e0a12SSteven Whitehouse GFS2_LOCKNAME_LEN); 1379e6e0a12SSteven Whitehouse break; 1389e6e0a12SSteven Whitehouse case Opt_locktable: 1399e6e0a12SSteven Whitehouse match_strlcpy(args->ar_locktable, &tmp[0], 1409e6e0a12SSteven Whitehouse GFS2_LOCKNAME_LEN); 1419e6e0a12SSteven Whitehouse break; 1429e6e0a12SSteven Whitehouse case Opt_hostdata: 1439e6e0a12SSteven Whitehouse match_strlcpy(args->ar_hostdata, &tmp[0], 1449e6e0a12SSteven Whitehouse GFS2_LOCKNAME_LEN); 1459e6e0a12SSteven Whitehouse break; 1469e6e0a12SSteven Whitehouse case Opt_spectator: 1479e6e0a12SSteven Whitehouse args->ar_spectator = 1; 1489e6e0a12SSteven Whitehouse break; 1499e6e0a12SSteven Whitehouse case Opt_ignore_local_fs: 1509e6e0a12SSteven Whitehouse args->ar_ignore_local_fs = 1; 1519e6e0a12SSteven Whitehouse break; 1529e6e0a12SSteven Whitehouse case Opt_localflocks: 1539e6e0a12SSteven Whitehouse args->ar_localflocks = 1; 1549e6e0a12SSteven Whitehouse break; 1559e6e0a12SSteven Whitehouse case Opt_localcaching: 1569e6e0a12SSteven Whitehouse args->ar_localcaching = 1; 1579e6e0a12SSteven Whitehouse break; 1589e6e0a12SSteven Whitehouse case Opt_debug: 159d34843d0SBob Peterson if (args->ar_errors == GFS2_ERRORS_PANIC) { 160f55073ffSSteven Whitehouse printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " 161d34843d0SBob Peterson "are mutually exclusive.\n"); 162d34843d0SBob Peterson return -EINVAL; 163d34843d0SBob Peterson } 1649e6e0a12SSteven Whitehouse args->ar_debug = 1; 1659e6e0a12SSteven Whitehouse break; 1669e6e0a12SSteven Whitehouse case Opt_nodebug: 1679e6e0a12SSteven Whitehouse args->ar_debug = 0; 1689e6e0a12SSteven Whitehouse break; 1699e6e0a12SSteven Whitehouse case Opt_upgrade: 1709e6e0a12SSteven Whitehouse args->ar_upgrade = 1; 1719e6e0a12SSteven Whitehouse break; 1729e6e0a12SSteven Whitehouse case Opt_acl: 1739e6e0a12SSteven Whitehouse args->ar_posix_acl = 1; 1749e6e0a12SSteven Whitehouse break; 1759e6e0a12SSteven Whitehouse case Opt_noacl: 1769e6e0a12SSteven Whitehouse args->ar_posix_acl = 0; 1779e6e0a12SSteven Whitehouse break; 1789e6e0a12SSteven Whitehouse case Opt_quota_off: 1799e6e0a12SSteven Whitehouse case Opt_noquota: 1809e6e0a12SSteven Whitehouse args->ar_quota = GFS2_QUOTA_OFF; 1819e6e0a12SSteven Whitehouse break; 1829e6e0a12SSteven Whitehouse case Opt_quota_account: 1839e6e0a12SSteven Whitehouse args->ar_quota = GFS2_QUOTA_ACCOUNT; 1849e6e0a12SSteven Whitehouse break; 1859e6e0a12SSteven Whitehouse case Opt_quota_on: 1869e6e0a12SSteven Whitehouse case Opt_quota: 1879e6e0a12SSteven Whitehouse args->ar_quota = GFS2_QUOTA_ON; 1889e6e0a12SSteven Whitehouse break; 1899e6e0a12SSteven Whitehouse case Opt_suiddir: 1909e6e0a12SSteven Whitehouse args->ar_suiddir = 1; 1919e6e0a12SSteven Whitehouse break; 1929e6e0a12SSteven Whitehouse case Opt_nosuiddir: 1939e6e0a12SSteven Whitehouse args->ar_suiddir = 0; 1949e6e0a12SSteven Whitehouse break; 1959e6e0a12SSteven Whitehouse case Opt_data_writeback: 1969e6e0a12SSteven Whitehouse args->ar_data = GFS2_DATA_WRITEBACK; 1979e6e0a12SSteven Whitehouse break; 1989e6e0a12SSteven Whitehouse case Opt_data_ordered: 1999e6e0a12SSteven Whitehouse args->ar_data = GFS2_DATA_ORDERED; 2009e6e0a12SSteven Whitehouse break; 2019e6e0a12SSteven Whitehouse case Opt_meta: 2029e6e0a12SSteven Whitehouse args->ar_meta = 1; 2039e6e0a12SSteven Whitehouse break; 2049e6e0a12SSteven Whitehouse case Opt_discard: 2059e6e0a12SSteven Whitehouse args->ar_discard = 1; 2069e6e0a12SSteven Whitehouse break; 2079e6e0a12SSteven Whitehouse case Opt_nodiscard: 2089e6e0a12SSteven Whitehouse args->ar_discard = 0; 2099e6e0a12SSteven Whitehouse break; 2109e6e0a12SSteven Whitehouse case Opt_commit: 2119e6e0a12SSteven Whitehouse rv = match_int(&tmp[0], &args->ar_commit); 2129e6e0a12SSteven Whitehouse if (rv || args->ar_commit <= 0) { 213f55073ffSSteven Whitehouse printk(KERN_WARNING "GFS2: commit mount option requires a positive numeric argument\n"); 2149e6e0a12SSteven Whitehouse return rv ? rv : -EINVAL; 2159e6e0a12SSteven Whitehouse } 2169e6e0a12SSteven Whitehouse break; 217d34843d0SBob Peterson case Opt_err_withdraw: 218d34843d0SBob Peterson args->ar_errors = GFS2_ERRORS_WITHDRAW; 219d34843d0SBob Peterson break; 220d34843d0SBob Peterson case Opt_err_panic: 221d34843d0SBob Peterson if (args->ar_debug) { 222f55073ffSSteven Whitehouse printk(KERN_WARNING "GFS2: -o debug and -o errors=panic " 223d34843d0SBob Peterson "are mutually exclusive.\n"); 224d34843d0SBob Peterson return -EINVAL; 225d34843d0SBob Peterson } 226d34843d0SBob Peterson args->ar_errors = GFS2_ERRORS_PANIC; 227d34843d0SBob Peterson break; 2289e6e0a12SSteven Whitehouse case Opt_error: 2299e6e0a12SSteven Whitehouse default: 230f55073ffSSteven Whitehouse printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o); 2319e6e0a12SSteven Whitehouse return -EINVAL; 2329e6e0a12SSteven Whitehouse } 2339e6e0a12SSteven Whitehouse } 2349e6e0a12SSteven Whitehouse 2359e6e0a12SSteven Whitehouse return 0; 2369e6e0a12SSteven Whitehouse } 237b3b94faaSDavid Teigland 238fefc03bfSSteven Whitehouse /** 239fefc03bfSSteven Whitehouse * gfs2_jindex_free - Clear all the journal index information 240fefc03bfSSteven Whitehouse * @sdp: The GFS2 superblock 241fefc03bfSSteven Whitehouse * 242fefc03bfSSteven Whitehouse */ 243fefc03bfSSteven Whitehouse 244fefc03bfSSteven Whitehouse void gfs2_jindex_free(struct gfs2_sbd *sdp) 245fefc03bfSSteven Whitehouse { 246fefc03bfSSteven Whitehouse struct list_head list, *head; 247fefc03bfSSteven Whitehouse struct gfs2_jdesc *jd; 248fefc03bfSSteven Whitehouse struct gfs2_journal_extent *jext; 249fefc03bfSSteven Whitehouse 250fefc03bfSSteven Whitehouse spin_lock(&sdp->sd_jindex_spin); 251fefc03bfSSteven Whitehouse list_add(&list, &sdp->sd_jindex_list); 252fefc03bfSSteven Whitehouse list_del_init(&sdp->sd_jindex_list); 253fefc03bfSSteven Whitehouse sdp->sd_journals = 0; 254fefc03bfSSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin); 255fefc03bfSSteven Whitehouse 256fefc03bfSSteven Whitehouse while (!list_empty(&list)) { 257fefc03bfSSteven Whitehouse jd = list_entry(list.next, struct gfs2_jdesc, jd_list); 258fefc03bfSSteven Whitehouse head = &jd->extent_list; 259fefc03bfSSteven Whitehouse while (!list_empty(head)) { 260fefc03bfSSteven Whitehouse jext = list_entry(head->next, 261fefc03bfSSteven Whitehouse struct gfs2_journal_extent, 262fefc03bfSSteven Whitehouse extent_list); 263fefc03bfSSteven Whitehouse list_del(&jext->extent_list); 264fefc03bfSSteven Whitehouse kfree(jext); 265fefc03bfSSteven Whitehouse } 266fefc03bfSSteven Whitehouse list_del(&jd->jd_list); 267fefc03bfSSteven Whitehouse iput(jd->jd_inode); 268fefc03bfSSteven Whitehouse kfree(jd); 269fefc03bfSSteven Whitehouse } 270fefc03bfSSteven Whitehouse } 271fefc03bfSSteven Whitehouse 272b3b94faaSDavid Teigland static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) 273b3b94faaSDavid Teigland { 274b3b94faaSDavid Teigland struct gfs2_jdesc *jd; 275b3b94faaSDavid Teigland int found = 0; 276b3b94faaSDavid Teigland 277b3b94faaSDavid Teigland list_for_each_entry(jd, head, jd_list) { 278b3b94faaSDavid Teigland if (jd->jd_jid == jid) { 279b3b94faaSDavid Teigland found = 1; 280b3b94faaSDavid Teigland break; 281b3b94faaSDavid Teigland } 282b3b94faaSDavid Teigland } 283b3b94faaSDavid Teigland 284b3b94faaSDavid Teigland if (!found) 285b3b94faaSDavid Teigland jd = NULL; 286b3b94faaSDavid Teigland 287b3b94faaSDavid Teigland return jd; 288b3b94faaSDavid Teigland } 289b3b94faaSDavid Teigland 290b3b94faaSDavid Teigland struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) 291b3b94faaSDavid Teigland { 292b3b94faaSDavid Teigland struct gfs2_jdesc *jd; 293b3b94faaSDavid Teigland 294b3b94faaSDavid Teigland spin_lock(&sdp->sd_jindex_spin); 295b3b94faaSDavid Teigland jd = jdesc_find_i(&sdp->sd_jindex_list, jid); 296b3b94faaSDavid Teigland spin_unlock(&sdp->sd_jindex_spin); 297b3b94faaSDavid Teigland 298b3b94faaSDavid Teigland return jd; 299b3b94faaSDavid Teigland } 300b3b94faaSDavid Teigland 301b3b94faaSDavid Teigland int gfs2_jdesc_check(struct gfs2_jdesc *jd) 302b3b94faaSDavid Teigland { 303feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 304feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 305b3b94faaSDavid Teigland int ar; 306b3b94faaSDavid Teigland int error; 307b3b94faaSDavid Teigland 308c9e98886SSteven Whitehouse if (ip->i_disksize < (8 << 20) || ip->i_disksize > (1 << 30) || 309c9e98886SSteven Whitehouse (ip->i_disksize & (sdp->sd_sb.sb_bsize - 1))) { 310b3b94faaSDavid Teigland gfs2_consist_inode(ip); 311b3b94faaSDavid Teigland return -EIO; 312b3b94faaSDavid Teigland } 313c9e98886SSteven Whitehouse jd->jd_blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; 314b3b94faaSDavid Teigland 315c9e98886SSteven Whitehouse error = gfs2_write_alloc_required(ip, 0, ip->i_disksize, &ar); 316b3b94faaSDavid Teigland if (!error && ar) { 317b3b94faaSDavid Teigland gfs2_consist_inode(ip); 318b3b94faaSDavid Teigland error = -EIO; 319b3b94faaSDavid Teigland } 320b3b94faaSDavid Teigland 321b3b94faaSDavid Teigland return error; 322b3b94faaSDavid Teigland } 323b3b94faaSDavid Teigland 324b3b94faaSDavid Teigland /** 325b3b94faaSDavid Teigland * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one 326b3b94faaSDavid Teigland * @sdp: the filesystem 327b3b94faaSDavid Teigland * 328b3b94faaSDavid Teigland * Returns: errno 329b3b94faaSDavid Teigland */ 330b3b94faaSDavid Teigland 331b3b94faaSDavid Teigland int gfs2_make_fs_rw(struct gfs2_sbd *sdp) 332b3b94faaSDavid Teigland { 333feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); 3345c676f6dSSteven Whitehouse struct gfs2_glock *j_gl = ip->i_gl; 335b3b94faaSDavid Teigland struct gfs2_holder t_gh; 33655167622SAl Viro struct gfs2_log_header_host head; 337b3b94faaSDavid Teigland int error; 338b3b94faaSDavid Teigland 3391c0f4872SSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh); 340b3b94faaSDavid Teigland if (error) 341b3b94faaSDavid Teigland return error; 342b3b94faaSDavid Teigland 3431a14d3a6SSteven Whitehouse j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); 344b3b94faaSDavid Teigland 345b3b94faaSDavid Teigland error = gfs2_find_jhead(sdp->sd_jdesc, &head); 346b3b94faaSDavid Teigland if (error) 347b3b94faaSDavid Teigland goto fail; 348b3b94faaSDavid Teigland 349b3b94faaSDavid Teigland if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 350b3b94faaSDavid Teigland gfs2_consist(sdp); 351b3b94faaSDavid Teigland error = -EIO; 352b3b94faaSDavid Teigland goto fail; 353b3b94faaSDavid Teigland } 354b3b94faaSDavid Teigland 355b3b94faaSDavid Teigland /* Initialize some head of the log stuff */ 356b3b94faaSDavid Teigland sdp->sd_log_sequence = head.lh_sequence + 1; 357b3b94faaSDavid Teigland gfs2_log_pointers_init(sdp, head.lh_blkno); 358b3b94faaSDavid Teigland 359b3b94faaSDavid Teigland error = gfs2_quota_init(sdp); 360b3b94faaSDavid Teigland if (error) 361a91ea69fSSteven Whitehouse goto fail; 362b3b94faaSDavid Teigland 363b3b94faaSDavid Teigland set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 364b3b94faaSDavid Teigland 365b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&t_gh); 366b3b94faaSDavid Teigland 367b3b94faaSDavid Teigland return 0; 368b3b94faaSDavid Teigland 369b3b94faaSDavid Teigland fail: 370b3b94faaSDavid Teigland t_gh.gh_flags |= GL_NOCACHE; 371b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&t_gh); 372b3b94faaSDavid Teigland 373b3b94faaSDavid Teigland return error; 374b3b94faaSDavid Teigland } 375b3b94faaSDavid Teigland 3761946f70aSBenjamin Marzinski void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) 377bb8d8a6fSSteven Whitehouse { 378bb8d8a6fSSteven Whitehouse const struct gfs2_statfs_change *str = buf; 379bb8d8a6fSSteven Whitehouse 380bb8d8a6fSSteven Whitehouse sc->sc_total = be64_to_cpu(str->sc_total); 381bb8d8a6fSSteven Whitehouse sc->sc_free = be64_to_cpu(str->sc_free); 382bb8d8a6fSSteven Whitehouse sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); 383bb8d8a6fSSteven Whitehouse } 384bb8d8a6fSSteven Whitehouse 385bb8d8a6fSSteven Whitehouse static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) 386bb8d8a6fSSteven Whitehouse { 387bb8d8a6fSSteven Whitehouse struct gfs2_statfs_change *str = buf; 388bb8d8a6fSSteven Whitehouse 389bb8d8a6fSSteven Whitehouse str->sc_total = cpu_to_be64(sc->sc_total); 390bb8d8a6fSSteven Whitehouse str->sc_free = cpu_to_be64(sc->sc_free); 391bb8d8a6fSSteven Whitehouse str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); 392bb8d8a6fSSteven Whitehouse } 393bb8d8a6fSSteven Whitehouse 394b3b94faaSDavid Teigland int gfs2_statfs_init(struct gfs2_sbd *sdp) 395b3b94faaSDavid Teigland { 396feaa7bbaSSteven Whitehouse struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 397bd209cc0SAl Viro struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 398feaa7bbaSSteven Whitehouse struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 399bd209cc0SAl Viro struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 400b3b94faaSDavid Teigland struct buffer_head *m_bh, *l_bh; 401b3b94faaSDavid Teigland struct gfs2_holder gh; 402b3b94faaSDavid Teigland int error; 403b3b94faaSDavid Teigland 404b3b94faaSDavid Teigland error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 405b3b94faaSDavid Teigland &gh); 406b3b94faaSDavid Teigland if (error) 407b3b94faaSDavid Teigland return error; 408b3b94faaSDavid Teigland 409b3b94faaSDavid Teigland error = gfs2_meta_inode_buffer(m_ip, &m_bh); 410b3b94faaSDavid Teigland if (error) 411b3b94faaSDavid Teigland goto out; 412b3b94faaSDavid Teigland 413b3b94faaSDavid Teigland if (sdp->sd_args.ar_spectator) { 414b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin); 415b3b94faaSDavid Teigland gfs2_statfs_change_in(m_sc, m_bh->b_data + 416b3b94faaSDavid Teigland sizeof(struct gfs2_dinode)); 417b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin); 418b3b94faaSDavid Teigland } else { 419b3b94faaSDavid Teigland error = gfs2_meta_inode_buffer(l_ip, &l_bh); 420b3b94faaSDavid Teigland if (error) 421b3b94faaSDavid Teigland goto out_m_bh; 422b3b94faaSDavid Teigland 423b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin); 424b3b94faaSDavid Teigland gfs2_statfs_change_in(m_sc, m_bh->b_data + 425b3b94faaSDavid Teigland sizeof(struct gfs2_dinode)); 426b3b94faaSDavid Teigland gfs2_statfs_change_in(l_sc, l_bh->b_data + 427b3b94faaSDavid Teigland sizeof(struct gfs2_dinode)); 428b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin); 429b3b94faaSDavid Teigland 430b3b94faaSDavid Teigland brelse(l_bh); 431b3b94faaSDavid Teigland } 432b3b94faaSDavid Teigland 433b3b94faaSDavid Teigland out_m_bh: 434b3b94faaSDavid Teigland brelse(m_bh); 435b3b94faaSDavid Teigland out: 436b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&gh); 437b3b94faaSDavid Teigland return 0; 438b3b94faaSDavid Teigland } 439b3b94faaSDavid Teigland 440cd915493SSteven Whitehouse void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, 441cd915493SSteven Whitehouse s64 dinodes) 442b3b94faaSDavid Teigland { 443feaa7bbaSSteven Whitehouse struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 444bd209cc0SAl Viro struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 445b3b94faaSDavid Teigland struct buffer_head *l_bh; 446b3b94faaSDavid Teigland int error; 447b3b94faaSDavid Teigland 448b3b94faaSDavid Teigland error = gfs2_meta_inode_buffer(l_ip, &l_bh); 449b3b94faaSDavid Teigland if (error) 450b3b94faaSDavid Teigland return; 451b3b94faaSDavid Teigland 452d4e9c4c3SSteven Whitehouse gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); 453b3b94faaSDavid Teigland 454b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin); 455b3b94faaSDavid Teigland l_sc->sc_total += total; 456b3b94faaSDavid Teigland l_sc->sc_free += free; 457b3b94faaSDavid Teigland l_sc->sc_dinodes += dinodes; 458907b9bceSSteven Whitehouse gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); 459b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin); 460b3b94faaSDavid Teigland 461b3b94faaSDavid Teigland brelse(l_bh); 462b3b94faaSDavid Teigland } 463b3b94faaSDavid Teigland 4641946f70aSBenjamin Marzinski void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh, 4651946f70aSBenjamin Marzinski struct buffer_head *l_bh) 4661946f70aSBenjamin Marzinski { 4671946f70aSBenjamin Marzinski struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 4681946f70aSBenjamin Marzinski struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 4691946f70aSBenjamin Marzinski struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 4701946f70aSBenjamin Marzinski struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 4711946f70aSBenjamin Marzinski 4721946f70aSBenjamin Marzinski gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); 4731946f70aSBenjamin Marzinski 4741946f70aSBenjamin Marzinski spin_lock(&sdp->sd_statfs_spin); 4751946f70aSBenjamin Marzinski m_sc->sc_total += l_sc->sc_total; 4761946f70aSBenjamin Marzinski m_sc->sc_free += l_sc->sc_free; 4771946f70aSBenjamin Marzinski m_sc->sc_dinodes += l_sc->sc_dinodes; 4781946f70aSBenjamin Marzinski memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); 4791946f70aSBenjamin Marzinski memset(l_bh->b_data + sizeof(struct gfs2_dinode), 4801946f70aSBenjamin Marzinski 0, sizeof(struct gfs2_statfs_change)); 4811946f70aSBenjamin Marzinski spin_unlock(&sdp->sd_statfs_spin); 4821946f70aSBenjamin Marzinski 4831946f70aSBenjamin Marzinski gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); 4841946f70aSBenjamin Marzinski gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); 4851946f70aSBenjamin Marzinski } 4861946f70aSBenjamin Marzinski 487b3b94faaSDavid Teigland int gfs2_statfs_sync(struct gfs2_sbd *sdp) 488b3b94faaSDavid Teigland { 489feaa7bbaSSteven Whitehouse struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 490feaa7bbaSSteven Whitehouse struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 491bd209cc0SAl Viro struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 492bd209cc0SAl Viro struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 493b3b94faaSDavid Teigland struct gfs2_holder gh; 494b3b94faaSDavid Teigland struct buffer_head *m_bh, *l_bh; 495b3b94faaSDavid Teigland int error; 496b3b94faaSDavid Teigland 497b3b94faaSDavid Teigland error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 498b3b94faaSDavid Teigland &gh); 499b3b94faaSDavid Teigland if (error) 500b3b94faaSDavid Teigland return error; 501b3b94faaSDavid Teigland 502b3b94faaSDavid Teigland error = gfs2_meta_inode_buffer(m_ip, &m_bh); 503b3b94faaSDavid Teigland if (error) 504b3b94faaSDavid Teigland goto out; 505b3b94faaSDavid Teigland 506b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin); 507b3b94faaSDavid Teigland gfs2_statfs_change_in(m_sc, m_bh->b_data + 508b3b94faaSDavid Teigland sizeof(struct gfs2_dinode)); 509b3b94faaSDavid Teigland if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { 510b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin); 511b3b94faaSDavid Teigland goto out_bh; 512b3b94faaSDavid Teigland } 513b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin); 514b3b94faaSDavid Teigland 515b3b94faaSDavid Teigland error = gfs2_meta_inode_buffer(l_ip, &l_bh); 516b3b94faaSDavid Teigland if (error) 517b3b94faaSDavid Teigland goto out_bh; 518b3b94faaSDavid Teigland 519b3b94faaSDavid Teigland error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); 520b3b94faaSDavid Teigland if (error) 521b3b94faaSDavid Teigland goto out_bh2; 522b3b94faaSDavid Teigland 5231946f70aSBenjamin Marzinski update_statfs(sdp, m_bh, l_bh); 524b3b94faaSDavid Teigland 525b3b94faaSDavid Teigland gfs2_trans_end(sdp); 526b3b94faaSDavid Teigland 527b3b94faaSDavid Teigland out_bh2: 528b3b94faaSDavid Teigland brelse(l_bh); 529b3b94faaSDavid Teigland out_bh: 530b3b94faaSDavid Teigland brelse(m_bh); 531b3b94faaSDavid Teigland out: 532b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&gh); 533b3b94faaSDavid Teigland return error; 534b3b94faaSDavid Teigland } 535b3b94faaSDavid Teigland 536b3b94faaSDavid Teigland struct lfcc { 537b3b94faaSDavid Teigland struct list_head list; 538b3b94faaSDavid Teigland struct gfs2_holder gh; 539b3b94faaSDavid Teigland }; 540b3b94faaSDavid Teigland 541b3b94faaSDavid Teigland /** 542b3b94faaSDavid Teigland * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all 543b3b94faaSDavid Teigland * journals are clean 544b3b94faaSDavid Teigland * @sdp: the file system 545b3b94faaSDavid Teigland * @state: the state to put the transaction lock into 546b3b94faaSDavid Teigland * @t_gh: the hold on the transaction lock 547b3b94faaSDavid Teigland * 548b3b94faaSDavid Teigland * Returns: errno 549b3b94faaSDavid Teigland */ 550b3b94faaSDavid Teigland 55108bc2dbcSAdrian Bunk static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, 55208bc2dbcSAdrian Bunk struct gfs2_holder *t_gh) 553b3b94faaSDavid Teigland { 5545c676f6dSSteven Whitehouse struct gfs2_inode *ip; 555b3b94faaSDavid Teigland struct gfs2_jdesc *jd; 556b3b94faaSDavid Teigland struct lfcc *lfcc; 557b3b94faaSDavid Teigland LIST_HEAD(list); 55855167622SAl Viro struct gfs2_log_header_host lh; 559b3b94faaSDavid Teigland int error; 560b3b94faaSDavid Teigland 561b3b94faaSDavid Teigland list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 562b3b94faaSDavid Teigland lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); 563b3b94faaSDavid Teigland if (!lfcc) { 564b3b94faaSDavid Teigland error = -ENOMEM; 565b3b94faaSDavid Teigland goto out; 566b3b94faaSDavid Teigland } 567feaa7bbaSSteven Whitehouse ip = GFS2_I(jd->jd_inode); 568feaa7bbaSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); 569b3b94faaSDavid Teigland if (error) { 570b3b94faaSDavid Teigland kfree(lfcc); 571b3b94faaSDavid Teigland goto out; 572b3b94faaSDavid Teigland } 573b3b94faaSDavid Teigland list_add(&lfcc->list, &list); 574b3b94faaSDavid Teigland } 575b3b94faaSDavid Teigland 576b3b94faaSDavid Teigland error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED, 5776802e340SSteven Whitehouse GL_NOCACHE, t_gh); 578b3b94faaSDavid Teigland 579b3b94faaSDavid Teigland list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 580b3b94faaSDavid Teigland error = gfs2_jdesc_check(jd); 581b3b94faaSDavid Teigland if (error) 582b3b94faaSDavid Teigland break; 583b3b94faaSDavid Teigland error = gfs2_find_jhead(jd, &lh); 584b3b94faaSDavid Teigland if (error) 585b3b94faaSDavid Teigland break; 586b3b94faaSDavid Teigland if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 587b3b94faaSDavid Teigland error = -EBUSY; 588b3b94faaSDavid Teigland break; 589b3b94faaSDavid Teigland } 590b3b94faaSDavid Teigland } 591b3b94faaSDavid Teigland 592b3b94faaSDavid Teigland if (error) 593b3b94faaSDavid Teigland gfs2_glock_dq_uninit(t_gh); 594b3b94faaSDavid Teigland 595b3b94faaSDavid Teigland out: 596b3b94faaSDavid Teigland while (!list_empty(&list)) { 597b3b94faaSDavid Teigland lfcc = list_entry(list.next, struct lfcc, list); 598b3b94faaSDavid Teigland list_del(&lfcc->list); 599b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&lfcc->gh); 600b3b94faaSDavid Teigland kfree(lfcc); 601b3b94faaSDavid Teigland } 602b3b94faaSDavid Teigland return error; 603b3b94faaSDavid Teigland } 604b3b94faaSDavid Teigland 605b3b94faaSDavid Teigland /** 606b3b94faaSDavid Teigland * gfs2_freeze_fs - freezes the file system 607b3b94faaSDavid Teigland * @sdp: the file system 608b3b94faaSDavid Teigland * 609b3b94faaSDavid Teigland * This function flushes data and meta data for all machines by 610b3b94faaSDavid Teigland * aquiring the transaction log exclusively. All journals are 611b3b94faaSDavid Teigland * ensured to be in a clean state as well. 612b3b94faaSDavid Teigland * 613b3b94faaSDavid Teigland * Returns: errno 614b3b94faaSDavid Teigland */ 615b3b94faaSDavid Teigland 616b3b94faaSDavid Teigland int gfs2_freeze_fs(struct gfs2_sbd *sdp) 617b3b94faaSDavid Teigland { 618b3b94faaSDavid Teigland int error = 0; 619b3b94faaSDavid Teigland 620f55ab26aSSteven Whitehouse mutex_lock(&sdp->sd_freeze_lock); 621b3b94faaSDavid Teigland 622b3b94faaSDavid Teigland if (!sdp->sd_freeze_count++) { 623b3b94faaSDavid Teigland error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); 624b3b94faaSDavid Teigland if (error) 625b3b94faaSDavid Teigland sdp->sd_freeze_count--; 626b3b94faaSDavid Teigland } 627b3b94faaSDavid Teigland 628f55ab26aSSteven Whitehouse mutex_unlock(&sdp->sd_freeze_lock); 629b3b94faaSDavid Teigland 630b3b94faaSDavid Teigland return error; 631b3b94faaSDavid Teigland } 632b3b94faaSDavid Teigland 633b3b94faaSDavid Teigland /** 634b3b94faaSDavid Teigland * gfs2_unfreeze_fs - unfreezes the file system 635b3b94faaSDavid Teigland * @sdp: the file system 636b3b94faaSDavid Teigland * 637b3b94faaSDavid Teigland * This function allows the file system to proceed by unlocking 638b3b94faaSDavid Teigland * the exclusively held transaction lock. Other GFS2 nodes are 639b3b94faaSDavid Teigland * now free to acquire the lock shared and go on with their lives. 640b3b94faaSDavid Teigland * 641b3b94faaSDavid Teigland */ 642b3b94faaSDavid Teigland 643b3b94faaSDavid Teigland void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) 644b3b94faaSDavid Teigland { 645f55ab26aSSteven Whitehouse mutex_lock(&sdp->sd_freeze_lock); 646b3b94faaSDavid Teigland 647b3b94faaSDavid Teigland if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) 648b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 649b3b94faaSDavid Teigland 650f55ab26aSSteven Whitehouse mutex_unlock(&sdp->sd_freeze_lock); 651b3b94faaSDavid Teigland } 652b3b94faaSDavid Teigland 6539e6e0a12SSteven Whitehouse 6549e6e0a12SSteven Whitehouse /** 6559e6e0a12SSteven Whitehouse * gfs2_write_inode - Make sure the inode is stable on the disk 6569e6e0a12SSteven Whitehouse * @inode: The inode 6579e6e0a12SSteven Whitehouse * @sync: synchronous write flag 6589e6e0a12SSteven Whitehouse * 6599e6e0a12SSteven Whitehouse * Returns: errno 6609e6e0a12SSteven Whitehouse */ 6619e6e0a12SSteven Whitehouse 6629e6e0a12SSteven Whitehouse static int gfs2_write_inode(struct inode *inode, int sync) 6639e6e0a12SSteven Whitehouse { 6649e6e0a12SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 6659e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 6669e6e0a12SSteven Whitehouse struct gfs2_holder gh; 6679e6e0a12SSteven Whitehouse struct buffer_head *bh; 6689e6e0a12SSteven Whitehouse struct timespec atime; 6699e6e0a12SSteven Whitehouse struct gfs2_dinode *di; 6709e6e0a12SSteven Whitehouse int ret = 0; 6719e6e0a12SSteven Whitehouse 6729e6e0a12SSteven Whitehouse /* Check this is a "normal" inode, etc */ 6739e6e0a12SSteven Whitehouse if (!test_bit(GIF_USER, &ip->i_flags) || 6749e6e0a12SSteven Whitehouse (current->flags & PF_MEMALLOC)) 6759e6e0a12SSteven Whitehouse return 0; 6769e6e0a12SSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 6779e6e0a12SSteven Whitehouse if (ret) 6789e6e0a12SSteven Whitehouse goto do_flush; 6799e6e0a12SSteven Whitehouse ret = gfs2_trans_begin(sdp, RES_DINODE, 0); 6809e6e0a12SSteven Whitehouse if (ret) 6819e6e0a12SSteven Whitehouse goto do_unlock; 6829e6e0a12SSteven Whitehouse ret = gfs2_meta_inode_buffer(ip, &bh); 6839e6e0a12SSteven Whitehouse if (ret == 0) { 6849e6e0a12SSteven Whitehouse di = (struct gfs2_dinode *)bh->b_data; 6859e6e0a12SSteven Whitehouse atime.tv_sec = be64_to_cpu(di->di_atime); 6869e6e0a12SSteven Whitehouse atime.tv_nsec = be32_to_cpu(di->di_atime_nsec); 6879e6e0a12SSteven Whitehouse if (timespec_compare(&inode->i_atime, &atime) > 0) { 6889e6e0a12SSteven Whitehouse gfs2_trans_add_bh(ip->i_gl, bh, 1); 6899e6e0a12SSteven Whitehouse gfs2_dinode_out(ip, bh->b_data); 6909e6e0a12SSteven Whitehouse } 6919e6e0a12SSteven Whitehouse brelse(bh); 6929e6e0a12SSteven Whitehouse } 6939e6e0a12SSteven Whitehouse gfs2_trans_end(sdp); 6949e6e0a12SSteven Whitehouse do_unlock: 6959e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&gh); 6969e6e0a12SSteven Whitehouse do_flush: 6979e6e0a12SSteven Whitehouse if (sync != 0) 6989e6e0a12SSteven Whitehouse gfs2_log_flush(GFS2_SB(inode), ip->i_gl); 6999e6e0a12SSteven Whitehouse return ret; 7009e6e0a12SSteven Whitehouse } 7019e6e0a12SSteven Whitehouse 7029e6e0a12SSteven Whitehouse /** 7039e6e0a12SSteven Whitehouse * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one 7049e6e0a12SSteven Whitehouse * @sdp: the filesystem 7059e6e0a12SSteven Whitehouse * 7069e6e0a12SSteven Whitehouse * Returns: errno 7079e6e0a12SSteven Whitehouse */ 7089e6e0a12SSteven Whitehouse 7099e6e0a12SSteven Whitehouse static int gfs2_make_fs_ro(struct gfs2_sbd *sdp) 7109e6e0a12SSteven Whitehouse { 7119e6e0a12SSteven Whitehouse struct gfs2_holder t_gh; 7129e6e0a12SSteven Whitehouse int error; 7139e6e0a12SSteven Whitehouse 714b94a170eSBenjamin Marzinski flush_workqueue(gfs2_delete_workqueue); 7159e6e0a12SSteven Whitehouse gfs2_quota_sync(sdp); 7169e6e0a12SSteven Whitehouse gfs2_statfs_sync(sdp); 7179e6e0a12SSteven Whitehouse 7189e6e0a12SSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE, 7199e6e0a12SSteven Whitehouse &t_gh); 7209e6e0a12SSteven Whitehouse if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 7219e6e0a12SSteven Whitehouse return error; 7229e6e0a12SSteven Whitehouse 7239e6e0a12SSteven Whitehouse gfs2_meta_syncfs(sdp); 7249e6e0a12SSteven Whitehouse gfs2_log_shutdown(sdp); 7259e6e0a12SSteven Whitehouse 7269e6e0a12SSteven Whitehouse clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 7279e6e0a12SSteven Whitehouse 7289e6e0a12SSteven Whitehouse if (t_gh.gh_gl) 7299e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&t_gh); 7309e6e0a12SSteven Whitehouse 7319e6e0a12SSteven Whitehouse gfs2_quota_cleanup(sdp); 7329e6e0a12SSteven Whitehouse 7339e6e0a12SSteven Whitehouse return error; 7349e6e0a12SSteven Whitehouse } 7359e6e0a12SSteven Whitehouse 7369e6e0a12SSteven Whitehouse static int gfs2_umount_recovery_wait(void *word) 7379e6e0a12SSteven Whitehouse { 7389e6e0a12SSteven Whitehouse schedule(); 7399e6e0a12SSteven Whitehouse return 0; 7409e6e0a12SSteven Whitehouse } 7419e6e0a12SSteven Whitehouse 7429e6e0a12SSteven Whitehouse /** 7439e6e0a12SSteven Whitehouse * gfs2_put_super - Unmount the filesystem 7449e6e0a12SSteven Whitehouse * @sb: The VFS superblock 7459e6e0a12SSteven Whitehouse * 7469e6e0a12SSteven Whitehouse */ 7479e6e0a12SSteven Whitehouse 7489e6e0a12SSteven Whitehouse static void gfs2_put_super(struct super_block *sb) 7499e6e0a12SSteven Whitehouse { 7509e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 7519e6e0a12SSteven Whitehouse int error; 7529e6e0a12SSteven Whitehouse struct gfs2_jdesc *jd; 7539e6e0a12SSteven Whitehouse 7549e6e0a12SSteven Whitehouse /* Unfreeze the filesystem, if we need to */ 7559e6e0a12SSteven Whitehouse 7569e6e0a12SSteven Whitehouse mutex_lock(&sdp->sd_freeze_lock); 7579e6e0a12SSteven Whitehouse if (sdp->sd_freeze_count) 7589e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); 7599e6e0a12SSteven Whitehouse mutex_unlock(&sdp->sd_freeze_lock); 7609e6e0a12SSteven Whitehouse 7619e6e0a12SSteven Whitehouse /* No more recovery requests */ 7629e6e0a12SSteven Whitehouse set_bit(SDF_NORECOVERY, &sdp->sd_flags); 7639e6e0a12SSteven Whitehouse smp_mb(); 7649e6e0a12SSteven Whitehouse 7659e6e0a12SSteven Whitehouse /* Wait on outstanding recovery */ 7669e6e0a12SSteven Whitehouse restart: 7679e6e0a12SSteven Whitehouse spin_lock(&sdp->sd_jindex_spin); 7689e6e0a12SSteven Whitehouse list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 7699e6e0a12SSteven Whitehouse if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) 7709e6e0a12SSteven Whitehouse continue; 7719e6e0a12SSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin); 7729e6e0a12SSteven Whitehouse wait_on_bit(&jd->jd_flags, JDF_RECOVERY, 7739e6e0a12SSteven Whitehouse gfs2_umount_recovery_wait, TASK_UNINTERRUPTIBLE); 7749e6e0a12SSteven Whitehouse goto restart; 7759e6e0a12SSteven Whitehouse } 7769e6e0a12SSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin); 7779e6e0a12SSteven Whitehouse 7789e6e0a12SSteven Whitehouse kthread_stop(sdp->sd_quotad_process); 7799e6e0a12SSteven Whitehouse kthread_stop(sdp->sd_logd_process); 7809e6e0a12SSteven Whitehouse 7819e6e0a12SSteven Whitehouse if (!(sb->s_flags & MS_RDONLY)) { 7829e6e0a12SSteven Whitehouse error = gfs2_make_fs_ro(sdp); 7839e6e0a12SSteven Whitehouse if (error) 7849e6e0a12SSteven Whitehouse gfs2_io_error(sdp); 7859e6e0a12SSteven Whitehouse } 7869e6e0a12SSteven Whitehouse /* At this point, we're through modifying the disk */ 7879e6e0a12SSteven Whitehouse 7889e6e0a12SSteven Whitehouse /* Release stuff */ 7899e6e0a12SSteven Whitehouse 7909e6e0a12SSteven Whitehouse iput(sdp->sd_jindex); 7919e6e0a12SSteven Whitehouse iput(sdp->sd_statfs_inode); 7929e6e0a12SSteven Whitehouse iput(sdp->sd_rindex); 7939e6e0a12SSteven Whitehouse iput(sdp->sd_quota_inode); 7949e6e0a12SSteven Whitehouse 7959e6e0a12SSteven Whitehouse gfs2_glock_put(sdp->sd_rename_gl); 7969e6e0a12SSteven Whitehouse gfs2_glock_put(sdp->sd_trans_gl); 7979e6e0a12SSteven Whitehouse 7989e6e0a12SSteven Whitehouse if (!sdp->sd_args.ar_spectator) { 7999e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_journal_gh); 8009e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); 8019e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_sc_gh); 8029e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_qc_gh); 8039e6e0a12SSteven Whitehouse iput(sdp->sd_sc_inode); 8049e6e0a12SSteven Whitehouse iput(sdp->sd_qc_inode); 8059e6e0a12SSteven Whitehouse } 8069e6e0a12SSteven Whitehouse 8079e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_live_gh); 8089e6e0a12SSteven Whitehouse gfs2_clear_rgrpd(sdp); 8099e6e0a12SSteven Whitehouse gfs2_jindex_free(sdp); 8109e6e0a12SSteven Whitehouse /* Take apart glock structures and buffer lists */ 8119e6e0a12SSteven Whitehouse gfs2_gl_hash_clear(sdp); 8129e6e0a12SSteven Whitehouse /* Unmount the locking protocol */ 8139e6e0a12SSteven Whitehouse gfs2_lm_unmount(sdp); 8149e6e0a12SSteven Whitehouse 8159e6e0a12SSteven Whitehouse /* At this point, we're through participating in the lockspace */ 8169e6e0a12SSteven Whitehouse gfs2_sys_fs_del(sdp); 8179e6e0a12SSteven Whitehouse } 8189e6e0a12SSteven Whitehouse 8199e6e0a12SSteven Whitehouse /** 8209e6e0a12SSteven Whitehouse * gfs2_sync_fs - sync the filesystem 8219e6e0a12SSteven Whitehouse * @sb: the superblock 8229e6e0a12SSteven Whitehouse * 8239e6e0a12SSteven Whitehouse * Flushes the log to disk. 8249e6e0a12SSteven Whitehouse */ 8259e6e0a12SSteven Whitehouse 8269e6e0a12SSteven Whitehouse static int gfs2_sync_fs(struct super_block *sb, int wait) 8279e6e0a12SSteven Whitehouse { 8289e6e0a12SSteven Whitehouse if (wait && sb->s_fs_info) 8299e6e0a12SSteven Whitehouse gfs2_log_flush(sb->s_fs_info, NULL); 8309e6e0a12SSteven Whitehouse return 0; 8319e6e0a12SSteven Whitehouse } 8329e6e0a12SSteven Whitehouse 8339e6e0a12SSteven Whitehouse /** 8349e6e0a12SSteven Whitehouse * gfs2_freeze - prevent further writes to the filesystem 8359e6e0a12SSteven Whitehouse * @sb: the VFS structure for the filesystem 8369e6e0a12SSteven Whitehouse * 8379e6e0a12SSteven Whitehouse */ 8389e6e0a12SSteven Whitehouse 8399e6e0a12SSteven Whitehouse static int gfs2_freeze(struct super_block *sb) 8409e6e0a12SSteven Whitehouse { 8419e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 8429e6e0a12SSteven Whitehouse int error; 8439e6e0a12SSteven Whitehouse 8449e6e0a12SSteven Whitehouse if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 8459e6e0a12SSteven Whitehouse return -EINVAL; 8469e6e0a12SSteven Whitehouse 8479e6e0a12SSteven Whitehouse for (;;) { 8489e6e0a12SSteven Whitehouse error = gfs2_freeze_fs(sdp); 8499e6e0a12SSteven Whitehouse if (!error) 8509e6e0a12SSteven Whitehouse break; 8519e6e0a12SSteven Whitehouse 8529e6e0a12SSteven Whitehouse switch (error) { 8539e6e0a12SSteven Whitehouse case -EBUSY: 8549e6e0a12SSteven Whitehouse fs_err(sdp, "waiting for recovery before freeze\n"); 8559e6e0a12SSteven Whitehouse break; 8569e6e0a12SSteven Whitehouse 8579e6e0a12SSteven Whitehouse default: 8589e6e0a12SSteven Whitehouse fs_err(sdp, "error freezing FS: %d\n", error); 8599e6e0a12SSteven Whitehouse break; 8609e6e0a12SSteven Whitehouse } 8619e6e0a12SSteven Whitehouse 8629e6e0a12SSteven Whitehouse fs_err(sdp, "retrying...\n"); 8639e6e0a12SSteven Whitehouse msleep(1000); 8649e6e0a12SSteven Whitehouse } 8659e6e0a12SSteven Whitehouse return 0; 8669e6e0a12SSteven Whitehouse } 8679e6e0a12SSteven Whitehouse 8689e6e0a12SSteven Whitehouse /** 8699e6e0a12SSteven Whitehouse * gfs2_unfreeze - reallow writes to the filesystem 8709e6e0a12SSteven Whitehouse * @sb: the VFS structure for the filesystem 8719e6e0a12SSteven Whitehouse * 8729e6e0a12SSteven Whitehouse */ 8739e6e0a12SSteven Whitehouse 8749e6e0a12SSteven Whitehouse static int gfs2_unfreeze(struct super_block *sb) 8759e6e0a12SSteven Whitehouse { 8769e6e0a12SSteven Whitehouse gfs2_unfreeze_fs(sb->s_fs_info); 8779e6e0a12SSteven Whitehouse return 0; 8789e6e0a12SSteven Whitehouse } 8799e6e0a12SSteven Whitehouse 8809e6e0a12SSteven Whitehouse /** 8819e6e0a12SSteven Whitehouse * statfs_fill - fill in the sg for a given RG 8829e6e0a12SSteven Whitehouse * @rgd: the RG 8839e6e0a12SSteven Whitehouse * @sc: the sc structure 8849e6e0a12SSteven Whitehouse * 8859e6e0a12SSteven Whitehouse * Returns: 0 on success, -ESTALE if the LVB is invalid 8869e6e0a12SSteven Whitehouse */ 8879e6e0a12SSteven Whitehouse 8889e6e0a12SSteven Whitehouse static int statfs_slow_fill(struct gfs2_rgrpd *rgd, 8899e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host *sc) 8909e6e0a12SSteven Whitehouse { 8919e6e0a12SSteven Whitehouse gfs2_rgrp_verify(rgd); 8929e6e0a12SSteven Whitehouse sc->sc_total += rgd->rd_data; 8939e6e0a12SSteven Whitehouse sc->sc_free += rgd->rd_free; 8949e6e0a12SSteven Whitehouse sc->sc_dinodes += rgd->rd_dinodes; 8959e6e0a12SSteven Whitehouse return 0; 8969e6e0a12SSteven Whitehouse } 8979e6e0a12SSteven Whitehouse 8989e6e0a12SSteven Whitehouse /** 8999e6e0a12SSteven Whitehouse * gfs2_statfs_slow - Stat a filesystem using asynchronous locking 9009e6e0a12SSteven Whitehouse * @sdp: the filesystem 9019e6e0a12SSteven Whitehouse * @sc: the sc info that will be returned 9029e6e0a12SSteven Whitehouse * 9039e6e0a12SSteven Whitehouse * Any error (other than a signal) will cause this routine to fall back 9049e6e0a12SSteven Whitehouse * to the synchronous version. 9059e6e0a12SSteven Whitehouse * 9069e6e0a12SSteven Whitehouse * FIXME: This really shouldn't busy wait like this. 9079e6e0a12SSteven Whitehouse * 9089e6e0a12SSteven Whitehouse * Returns: errno 9099e6e0a12SSteven Whitehouse */ 9109e6e0a12SSteven Whitehouse 9119e6e0a12SSteven Whitehouse static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 9129e6e0a12SSteven Whitehouse { 9139e6e0a12SSteven Whitehouse struct gfs2_holder ri_gh; 9149e6e0a12SSteven Whitehouse struct gfs2_rgrpd *rgd_next; 9159e6e0a12SSteven Whitehouse struct gfs2_holder *gha, *gh; 9169e6e0a12SSteven Whitehouse unsigned int slots = 64; 9179e6e0a12SSteven Whitehouse unsigned int x; 9189e6e0a12SSteven Whitehouse int done; 9199e6e0a12SSteven Whitehouse int error = 0, err; 9209e6e0a12SSteven Whitehouse 9219e6e0a12SSteven Whitehouse memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); 9229e6e0a12SSteven Whitehouse gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); 9239e6e0a12SSteven Whitehouse if (!gha) 9249e6e0a12SSteven Whitehouse return -ENOMEM; 9259e6e0a12SSteven Whitehouse 9269e6e0a12SSteven Whitehouse error = gfs2_rindex_hold(sdp, &ri_gh); 9279e6e0a12SSteven Whitehouse if (error) 9289e6e0a12SSteven Whitehouse goto out; 9299e6e0a12SSteven Whitehouse 9309e6e0a12SSteven Whitehouse rgd_next = gfs2_rgrpd_get_first(sdp); 9319e6e0a12SSteven Whitehouse 9329e6e0a12SSteven Whitehouse for (;;) { 9339e6e0a12SSteven Whitehouse done = 1; 9349e6e0a12SSteven Whitehouse 9359e6e0a12SSteven Whitehouse for (x = 0; x < slots; x++) { 9369e6e0a12SSteven Whitehouse gh = gha + x; 9379e6e0a12SSteven Whitehouse 9389e6e0a12SSteven Whitehouse if (gh->gh_gl && gfs2_glock_poll(gh)) { 9399e6e0a12SSteven Whitehouse err = gfs2_glock_wait(gh); 9409e6e0a12SSteven Whitehouse if (err) { 9419e6e0a12SSteven Whitehouse gfs2_holder_uninit(gh); 9429e6e0a12SSteven Whitehouse error = err; 9439e6e0a12SSteven Whitehouse } else { 9449e6e0a12SSteven Whitehouse if (!error) 9459e6e0a12SSteven Whitehouse error = statfs_slow_fill( 9469e6e0a12SSteven Whitehouse gh->gh_gl->gl_object, sc); 9479e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(gh); 9489e6e0a12SSteven Whitehouse } 9499e6e0a12SSteven Whitehouse } 9509e6e0a12SSteven Whitehouse 9519e6e0a12SSteven Whitehouse if (gh->gh_gl) 9529e6e0a12SSteven Whitehouse done = 0; 9539e6e0a12SSteven Whitehouse else if (rgd_next && !error) { 9549e6e0a12SSteven Whitehouse error = gfs2_glock_nq_init(rgd_next->rd_gl, 9559e6e0a12SSteven Whitehouse LM_ST_SHARED, 9569e6e0a12SSteven Whitehouse GL_ASYNC, 9579e6e0a12SSteven Whitehouse gh); 9589e6e0a12SSteven Whitehouse rgd_next = gfs2_rgrpd_get_next(rgd_next); 9599e6e0a12SSteven Whitehouse done = 0; 9609e6e0a12SSteven Whitehouse } 9619e6e0a12SSteven Whitehouse 9629e6e0a12SSteven Whitehouse if (signal_pending(current)) 9639e6e0a12SSteven Whitehouse error = -ERESTARTSYS; 9649e6e0a12SSteven Whitehouse } 9659e6e0a12SSteven Whitehouse 9669e6e0a12SSteven Whitehouse if (done) 9679e6e0a12SSteven Whitehouse break; 9689e6e0a12SSteven Whitehouse 9699e6e0a12SSteven Whitehouse yield(); 9709e6e0a12SSteven Whitehouse } 9719e6e0a12SSteven Whitehouse 9729e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&ri_gh); 9739e6e0a12SSteven Whitehouse 9749e6e0a12SSteven Whitehouse out: 9759e6e0a12SSteven Whitehouse kfree(gha); 9769e6e0a12SSteven Whitehouse return error; 9779e6e0a12SSteven Whitehouse } 9789e6e0a12SSteven Whitehouse 9799e6e0a12SSteven Whitehouse /** 9809e6e0a12SSteven Whitehouse * gfs2_statfs_i - Do a statfs 9819e6e0a12SSteven Whitehouse * @sdp: the filesystem 9829e6e0a12SSteven Whitehouse * @sg: the sg structure 9839e6e0a12SSteven Whitehouse * 9849e6e0a12SSteven Whitehouse * Returns: errno 9859e6e0a12SSteven Whitehouse */ 9869e6e0a12SSteven Whitehouse 9879e6e0a12SSteven Whitehouse static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 9889e6e0a12SSteven Whitehouse { 9899e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 9909e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 9919e6e0a12SSteven Whitehouse 9929e6e0a12SSteven Whitehouse spin_lock(&sdp->sd_statfs_spin); 9939e6e0a12SSteven Whitehouse 9949e6e0a12SSteven Whitehouse *sc = *m_sc; 9959e6e0a12SSteven Whitehouse sc->sc_total += l_sc->sc_total; 9969e6e0a12SSteven Whitehouse sc->sc_free += l_sc->sc_free; 9979e6e0a12SSteven Whitehouse sc->sc_dinodes += l_sc->sc_dinodes; 9989e6e0a12SSteven Whitehouse 9999e6e0a12SSteven Whitehouse spin_unlock(&sdp->sd_statfs_spin); 10009e6e0a12SSteven Whitehouse 10019e6e0a12SSteven Whitehouse if (sc->sc_free < 0) 10029e6e0a12SSteven Whitehouse sc->sc_free = 0; 10039e6e0a12SSteven Whitehouse if (sc->sc_free > sc->sc_total) 10049e6e0a12SSteven Whitehouse sc->sc_free = sc->sc_total; 10059e6e0a12SSteven Whitehouse if (sc->sc_dinodes < 0) 10069e6e0a12SSteven Whitehouse sc->sc_dinodes = 0; 10079e6e0a12SSteven Whitehouse 10089e6e0a12SSteven Whitehouse return 0; 10099e6e0a12SSteven Whitehouse } 10109e6e0a12SSteven Whitehouse 10119e6e0a12SSteven Whitehouse /** 10129e6e0a12SSteven Whitehouse * gfs2_statfs - Gather and return stats about the filesystem 10139e6e0a12SSteven Whitehouse * @sb: The superblock 10149e6e0a12SSteven Whitehouse * @statfsbuf: The buffer 10159e6e0a12SSteven Whitehouse * 10169e6e0a12SSteven Whitehouse * Returns: 0 on success or error code 10179e6e0a12SSteven Whitehouse */ 10189e6e0a12SSteven Whitehouse 10199e6e0a12SSteven Whitehouse static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 10209e6e0a12SSteven Whitehouse { 10219e6e0a12SSteven Whitehouse struct super_block *sb = dentry->d_inode->i_sb; 10229e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 10239e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host sc; 10249e6e0a12SSteven Whitehouse int error; 10259e6e0a12SSteven Whitehouse 10269e6e0a12SSteven Whitehouse if (gfs2_tune_get(sdp, gt_statfs_slow)) 10279e6e0a12SSteven Whitehouse error = gfs2_statfs_slow(sdp, &sc); 10289e6e0a12SSteven Whitehouse else 10299e6e0a12SSteven Whitehouse error = gfs2_statfs_i(sdp, &sc); 10309e6e0a12SSteven Whitehouse 10319e6e0a12SSteven Whitehouse if (error) 10329e6e0a12SSteven Whitehouse return error; 10339e6e0a12SSteven Whitehouse 10349e6e0a12SSteven Whitehouse buf->f_type = GFS2_MAGIC; 10359e6e0a12SSteven Whitehouse buf->f_bsize = sdp->sd_sb.sb_bsize; 10369e6e0a12SSteven Whitehouse buf->f_blocks = sc.sc_total; 10379e6e0a12SSteven Whitehouse buf->f_bfree = sc.sc_free; 10389e6e0a12SSteven Whitehouse buf->f_bavail = sc.sc_free; 10399e6e0a12SSteven Whitehouse buf->f_files = sc.sc_dinodes + sc.sc_free; 10409e6e0a12SSteven Whitehouse buf->f_ffree = sc.sc_free; 10419e6e0a12SSteven Whitehouse buf->f_namelen = GFS2_FNAMESIZE; 10429e6e0a12SSteven Whitehouse 10439e6e0a12SSteven Whitehouse return 0; 10449e6e0a12SSteven Whitehouse } 10459e6e0a12SSteven Whitehouse 10469e6e0a12SSteven Whitehouse /** 10479e6e0a12SSteven Whitehouse * gfs2_remount_fs - called when the FS is remounted 10489e6e0a12SSteven Whitehouse * @sb: the filesystem 10499e6e0a12SSteven Whitehouse * @flags: the remount flags 10509e6e0a12SSteven Whitehouse * @data: extra data passed in (not used right now) 10519e6e0a12SSteven Whitehouse * 10529e6e0a12SSteven Whitehouse * Returns: errno 10539e6e0a12SSteven Whitehouse */ 10549e6e0a12SSteven Whitehouse 10559e6e0a12SSteven Whitehouse static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data) 10569e6e0a12SSteven Whitehouse { 10579e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 10589e6e0a12SSteven Whitehouse struct gfs2_args args = sdp->sd_args; /* Default to current settings */ 10599e6e0a12SSteven Whitehouse struct gfs2_tune *gt = &sdp->sd_tune; 10609e6e0a12SSteven Whitehouse int error; 10619e6e0a12SSteven Whitehouse 10629e6e0a12SSteven Whitehouse spin_lock(>->gt_spin); 10639e6e0a12SSteven Whitehouse args.ar_commit = gt->gt_log_flush_secs; 10649e6e0a12SSteven Whitehouse spin_unlock(>->gt_spin); 1065f55073ffSSteven Whitehouse error = gfs2_mount_args(&args, data); 10669e6e0a12SSteven Whitehouse if (error) 10679e6e0a12SSteven Whitehouse return error; 10689e6e0a12SSteven Whitehouse 10699e6e0a12SSteven Whitehouse /* Not allowed to change locking details */ 10709e6e0a12SSteven Whitehouse if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) || 10719e6e0a12SSteven Whitehouse strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) || 10729e6e0a12SSteven Whitehouse strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata)) 10739e6e0a12SSteven Whitehouse return -EINVAL; 10749e6e0a12SSteven Whitehouse 10759e6e0a12SSteven Whitehouse /* Some flags must not be changed */ 10769e6e0a12SSteven Whitehouse if (args_neq(&args, &sdp->sd_args, spectator) || 10779e6e0a12SSteven Whitehouse args_neq(&args, &sdp->sd_args, ignore_local_fs) || 10789e6e0a12SSteven Whitehouse args_neq(&args, &sdp->sd_args, localflocks) || 10799e6e0a12SSteven Whitehouse args_neq(&args, &sdp->sd_args, localcaching) || 10809e6e0a12SSteven Whitehouse args_neq(&args, &sdp->sd_args, meta)) 10819e6e0a12SSteven Whitehouse return -EINVAL; 10829e6e0a12SSteven Whitehouse 10839e6e0a12SSteven Whitehouse if (sdp->sd_args.ar_spectator) 10849e6e0a12SSteven Whitehouse *flags |= MS_RDONLY; 10859e6e0a12SSteven Whitehouse 10869e6e0a12SSteven Whitehouse if ((sb->s_flags ^ *flags) & MS_RDONLY) { 10879e6e0a12SSteven Whitehouse if (*flags & MS_RDONLY) 10889e6e0a12SSteven Whitehouse error = gfs2_make_fs_ro(sdp); 10899e6e0a12SSteven Whitehouse else 10909e6e0a12SSteven Whitehouse error = gfs2_make_fs_rw(sdp); 10919e6e0a12SSteven Whitehouse if (error) 10929e6e0a12SSteven Whitehouse return error; 10939e6e0a12SSteven Whitehouse } 10949e6e0a12SSteven Whitehouse 10959e6e0a12SSteven Whitehouse sdp->sd_args = args; 10969e6e0a12SSteven Whitehouse if (sdp->sd_args.ar_posix_acl) 10979e6e0a12SSteven Whitehouse sb->s_flags |= MS_POSIXACL; 10989e6e0a12SSteven Whitehouse else 10999e6e0a12SSteven Whitehouse sb->s_flags &= ~MS_POSIXACL; 11009e6e0a12SSteven Whitehouse spin_lock(>->gt_spin); 11019e6e0a12SSteven Whitehouse gt->gt_log_flush_secs = args.ar_commit; 11029e6e0a12SSteven Whitehouse spin_unlock(>->gt_spin); 11039e6e0a12SSteven Whitehouse 11048633ecfaSSteven Whitehouse gfs2_online_uevent(sdp); 11059e6e0a12SSteven Whitehouse return 0; 11069e6e0a12SSteven Whitehouse } 11079e6e0a12SSteven Whitehouse 11089e6e0a12SSteven Whitehouse /** 11099e6e0a12SSteven Whitehouse * gfs2_drop_inode - Drop an inode (test for remote unlink) 11109e6e0a12SSteven Whitehouse * @inode: The inode to drop 11119e6e0a12SSteven Whitehouse * 11129e6e0a12SSteven Whitehouse * If we've received a callback on an iopen lock then its because a 11139e6e0a12SSteven Whitehouse * remote node tried to deallocate the inode but failed due to this node 11149e6e0a12SSteven Whitehouse * still having the inode open. Here we mark the link count zero 11159e6e0a12SSteven Whitehouse * since we know that it must have reached zero if the GLF_DEMOTE flag 11169e6e0a12SSteven Whitehouse * is set on the iopen glock. If we didn't do a disk read since the 11179e6e0a12SSteven Whitehouse * remote node removed the final link then we might otherwise miss 11189e6e0a12SSteven Whitehouse * this event. This check ensures that this node will deallocate the 11199e6e0a12SSteven Whitehouse * inode's blocks, or alternatively pass the baton on to another 11209e6e0a12SSteven Whitehouse * node for later deallocation. 11219e6e0a12SSteven Whitehouse */ 11229e6e0a12SSteven Whitehouse 11239e6e0a12SSteven Whitehouse static void gfs2_drop_inode(struct inode *inode) 11249e6e0a12SSteven Whitehouse { 11259e6e0a12SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11269e6e0a12SSteven Whitehouse 11279e6e0a12SSteven Whitehouse if (test_bit(GIF_USER, &ip->i_flags) && inode->i_nlink) { 11289e6e0a12SSteven Whitehouse struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 11299e6e0a12SSteven Whitehouse if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags)) 11309e6e0a12SSteven Whitehouse clear_nlink(inode); 11319e6e0a12SSteven Whitehouse } 11329e6e0a12SSteven Whitehouse generic_drop_inode(inode); 11339e6e0a12SSteven Whitehouse } 11349e6e0a12SSteven Whitehouse 11359e6e0a12SSteven Whitehouse /** 11369e6e0a12SSteven Whitehouse * gfs2_clear_inode - Deallocate an inode when VFS is done with it 11379e6e0a12SSteven Whitehouse * @inode: The VFS inode 11389e6e0a12SSteven Whitehouse * 11399e6e0a12SSteven Whitehouse */ 11409e6e0a12SSteven Whitehouse 11419e6e0a12SSteven Whitehouse static void gfs2_clear_inode(struct inode *inode) 11429e6e0a12SSteven Whitehouse { 11439e6e0a12SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11449e6e0a12SSteven Whitehouse 11459e6e0a12SSteven Whitehouse /* This tells us its a "real" inode and not one which only 11469e6e0a12SSteven Whitehouse * serves to contain an address space (see rgrp.c, meta_io.c) 11479e6e0a12SSteven Whitehouse * which therefore doesn't have its own glocks. 11489e6e0a12SSteven Whitehouse */ 11499e6e0a12SSteven Whitehouse if (test_bit(GIF_USER, &ip->i_flags)) { 11509e6e0a12SSteven Whitehouse ip->i_gl->gl_object = NULL; 11519e6e0a12SSteven Whitehouse gfs2_glock_put(ip->i_gl); 11529e6e0a12SSteven Whitehouse ip->i_gl = NULL; 11539e6e0a12SSteven Whitehouse if (ip->i_iopen_gh.gh_gl) { 11549e6e0a12SSteven Whitehouse ip->i_iopen_gh.gh_gl->gl_object = NULL; 11559e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&ip->i_iopen_gh); 11569e6e0a12SSteven Whitehouse } 11579e6e0a12SSteven Whitehouse } 11589e6e0a12SSteven Whitehouse } 11599e6e0a12SSteven Whitehouse 11609e6e0a12SSteven Whitehouse static int is_ancestor(const struct dentry *d1, const struct dentry *d2) 11619e6e0a12SSteven Whitehouse { 11629e6e0a12SSteven Whitehouse do { 11639e6e0a12SSteven Whitehouse if (d1 == d2) 11649e6e0a12SSteven Whitehouse return 1; 11659e6e0a12SSteven Whitehouse d1 = d1->d_parent; 11669e6e0a12SSteven Whitehouse } while (!IS_ROOT(d1)); 11679e6e0a12SSteven Whitehouse return 0; 11689e6e0a12SSteven Whitehouse } 11699e6e0a12SSteven Whitehouse 11709e6e0a12SSteven Whitehouse /** 11719e6e0a12SSteven Whitehouse * gfs2_show_options - Show mount options for /proc/mounts 11729e6e0a12SSteven Whitehouse * @s: seq_file structure 11739e6e0a12SSteven Whitehouse * @mnt: vfsmount 11749e6e0a12SSteven Whitehouse * 11759e6e0a12SSteven Whitehouse * Returns: 0 on success or error code 11769e6e0a12SSteven Whitehouse */ 11779e6e0a12SSteven Whitehouse 11789e6e0a12SSteven Whitehouse static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt) 11799e6e0a12SSteven Whitehouse { 11809e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info; 11819e6e0a12SSteven Whitehouse struct gfs2_args *args = &sdp->sd_args; 11829e6e0a12SSteven Whitehouse int lfsecs; 11839e6e0a12SSteven Whitehouse 11849e6e0a12SSteven Whitehouse if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir)) 11859e6e0a12SSteven Whitehouse seq_printf(s, ",meta"); 11869e6e0a12SSteven Whitehouse if (args->ar_lockproto[0]) 11879e6e0a12SSteven Whitehouse seq_printf(s, ",lockproto=%s", args->ar_lockproto); 11889e6e0a12SSteven Whitehouse if (args->ar_locktable[0]) 11899e6e0a12SSteven Whitehouse seq_printf(s, ",locktable=%s", args->ar_locktable); 11909e6e0a12SSteven Whitehouse if (args->ar_hostdata[0]) 11919e6e0a12SSteven Whitehouse seq_printf(s, ",hostdata=%s", args->ar_hostdata); 11929e6e0a12SSteven Whitehouse if (args->ar_spectator) 11939e6e0a12SSteven Whitehouse seq_printf(s, ",spectator"); 11949e6e0a12SSteven Whitehouse if (args->ar_ignore_local_fs) 11959e6e0a12SSteven Whitehouse seq_printf(s, ",ignore_local_fs"); 11969e6e0a12SSteven Whitehouse if (args->ar_localflocks) 11979e6e0a12SSteven Whitehouse seq_printf(s, ",localflocks"); 11989e6e0a12SSteven Whitehouse if (args->ar_localcaching) 11999e6e0a12SSteven Whitehouse seq_printf(s, ",localcaching"); 12009e6e0a12SSteven Whitehouse if (args->ar_debug) 12019e6e0a12SSteven Whitehouse seq_printf(s, ",debug"); 12029e6e0a12SSteven Whitehouse if (args->ar_upgrade) 12039e6e0a12SSteven Whitehouse seq_printf(s, ",upgrade"); 12049e6e0a12SSteven Whitehouse if (args->ar_posix_acl) 12059e6e0a12SSteven Whitehouse seq_printf(s, ",acl"); 12069e6e0a12SSteven Whitehouse if (args->ar_quota != GFS2_QUOTA_DEFAULT) { 12079e6e0a12SSteven Whitehouse char *state; 12089e6e0a12SSteven Whitehouse switch (args->ar_quota) { 12099e6e0a12SSteven Whitehouse case GFS2_QUOTA_OFF: 12109e6e0a12SSteven Whitehouse state = "off"; 12119e6e0a12SSteven Whitehouse break; 12129e6e0a12SSteven Whitehouse case GFS2_QUOTA_ACCOUNT: 12139e6e0a12SSteven Whitehouse state = "account"; 12149e6e0a12SSteven Whitehouse break; 12159e6e0a12SSteven Whitehouse case GFS2_QUOTA_ON: 12169e6e0a12SSteven Whitehouse state = "on"; 12179e6e0a12SSteven Whitehouse break; 12189e6e0a12SSteven Whitehouse default: 12199e6e0a12SSteven Whitehouse state = "unknown"; 12209e6e0a12SSteven Whitehouse break; 12219e6e0a12SSteven Whitehouse } 12229e6e0a12SSteven Whitehouse seq_printf(s, ",quota=%s", state); 12239e6e0a12SSteven Whitehouse } 12249e6e0a12SSteven Whitehouse if (args->ar_suiddir) 12259e6e0a12SSteven Whitehouse seq_printf(s, ",suiddir"); 12269e6e0a12SSteven Whitehouse if (args->ar_data != GFS2_DATA_DEFAULT) { 12279e6e0a12SSteven Whitehouse char *state; 12289e6e0a12SSteven Whitehouse switch (args->ar_data) { 12299e6e0a12SSteven Whitehouse case GFS2_DATA_WRITEBACK: 12309e6e0a12SSteven Whitehouse state = "writeback"; 12319e6e0a12SSteven Whitehouse break; 12329e6e0a12SSteven Whitehouse case GFS2_DATA_ORDERED: 12339e6e0a12SSteven Whitehouse state = "ordered"; 12349e6e0a12SSteven Whitehouse break; 12359e6e0a12SSteven Whitehouse default: 12369e6e0a12SSteven Whitehouse state = "unknown"; 12379e6e0a12SSteven Whitehouse break; 12389e6e0a12SSteven Whitehouse } 12399e6e0a12SSteven Whitehouse seq_printf(s, ",data=%s", state); 12409e6e0a12SSteven Whitehouse } 12419e6e0a12SSteven Whitehouse if (args->ar_discard) 12429e6e0a12SSteven Whitehouse seq_printf(s, ",discard"); 12439e6e0a12SSteven Whitehouse lfsecs = sdp->sd_tune.gt_log_flush_secs; 12449e6e0a12SSteven Whitehouse if (lfsecs != 60) 12459e6e0a12SSteven Whitehouse seq_printf(s, ",commit=%d", lfsecs); 1246d34843d0SBob Peterson if (args->ar_errors != GFS2_ERRORS_DEFAULT) { 1247d34843d0SBob Peterson const char *state; 1248d34843d0SBob Peterson 1249d34843d0SBob Peterson switch (args->ar_errors) { 1250d34843d0SBob Peterson case GFS2_ERRORS_WITHDRAW: 1251d34843d0SBob Peterson state = "withdraw"; 1252d34843d0SBob Peterson break; 1253d34843d0SBob Peterson case GFS2_ERRORS_PANIC: 1254d34843d0SBob Peterson state = "panic"; 1255d34843d0SBob Peterson break; 1256d34843d0SBob Peterson default: 1257d34843d0SBob Peterson state = "unknown"; 1258d34843d0SBob Peterson break; 1259d34843d0SBob Peterson } 1260d34843d0SBob Peterson seq_printf(s, ",errors=%s", state); 1261d34843d0SBob Peterson } 12629e6e0a12SSteven Whitehouse return 0; 12639e6e0a12SSteven Whitehouse } 12649e6e0a12SSteven Whitehouse 12659e6e0a12SSteven Whitehouse /* 12669e6e0a12SSteven Whitehouse * We have to (at the moment) hold the inodes main lock to cover 12679e6e0a12SSteven Whitehouse * the gap between unlocking the shared lock on the iopen lock and 12689e6e0a12SSteven Whitehouse * taking the exclusive lock. I'd rather do a shared -> exclusive 12699e6e0a12SSteven Whitehouse * conversion on the iopen lock, but we can change that later. This 12709e6e0a12SSteven Whitehouse * is safe, just less efficient. 12719e6e0a12SSteven Whitehouse */ 12729e6e0a12SSteven Whitehouse 12739e6e0a12SSteven Whitehouse static void gfs2_delete_inode(struct inode *inode) 12749e6e0a12SSteven Whitehouse { 12759e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = inode->i_sb->s_fs_info; 12769e6e0a12SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 12779e6e0a12SSteven Whitehouse struct gfs2_holder gh; 12789e6e0a12SSteven Whitehouse int error; 12799e6e0a12SSteven Whitehouse 12809e6e0a12SSteven Whitehouse if (!test_bit(GIF_USER, &ip->i_flags)) 12819e6e0a12SSteven Whitehouse goto out; 12829e6e0a12SSteven Whitehouse 12839e6e0a12SSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 12849e6e0a12SSteven Whitehouse if (unlikely(error)) { 12859e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&ip->i_iopen_gh); 12869e6e0a12SSteven Whitehouse goto out; 12879e6e0a12SSteven Whitehouse } 12889e6e0a12SSteven Whitehouse 1289acf7e244SSteven Whitehouse error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); 1290acf7e244SSteven Whitehouse if (error) 1291acf7e244SSteven Whitehouse goto out_truncate; 1292acf7e244SSteven Whitehouse 12939e6e0a12SSteven Whitehouse gfs2_glock_dq_wait(&ip->i_iopen_gh); 12949e6e0a12SSteven Whitehouse gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh); 12959e6e0a12SSteven Whitehouse error = gfs2_glock_nq(&ip->i_iopen_gh); 12969e6e0a12SSteven Whitehouse if (error) 12979e6e0a12SSteven Whitehouse goto out_truncate; 12989e6e0a12SSteven Whitehouse 12999e6e0a12SSteven Whitehouse if (S_ISDIR(inode->i_mode) && 13009e6e0a12SSteven Whitehouse (ip->i_diskflags & GFS2_DIF_EXHASH)) { 13019e6e0a12SSteven Whitehouse error = gfs2_dir_exhash_dealloc(ip); 13029e6e0a12SSteven Whitehouse if (error) 13039e6e0a12SSteven Whitehouse goto out_unlock; 13049e6e0a12SSteven Whitehouse } 13059e6e0a12SSteven Whitehouse 13069e6e0a12SSteven Whitehouse if (ip->i_eattr) { 13079e6e0a12SSteven Whitehouse error = gfs2_ea_dealloc(ip); 13089e6e0a12SSteven Whitehouse if (error) 13099e6e0a12SSteven Whitehouse goto out_unlock; 13109e6e0a12SSteven Whitehouse } 13119e6e0a12SSteven Whitehouse 13129e6e0a12SSteven Whitehouse if (!gfs2_is_stuffed(ip)) { 13139e6e0a12SSteven Whitehouse error = gfs2_file_dealloc(ip); 13149e6e0a12SSteven Whitehouse if (error) 13159e6e0a12SSteven Whitehouse goto out_unlock; 13169e6e0a12SSteven Whitehouse } 13179e6e0a12SSteven Whitehouse 13189e6e0a12SSteven Whitehouse error = gfs2_dinode_dealloc(ip); 13199e6e0a12SSteven Whitehouse if (error) 13209e6e0a12SSteven Whitehouse goto out_unlock; 13219e6e0a12SSteven Whitehouse 13229e6e0a12SSteven Whitehouse out_truncate: 13239e6e0a12SSteven Whitehouse error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); 13249e6e0a12SSteven Whitehouse if (error) 13259e6e0a12SSteven Whitehouse goto out_unlock; 13269e6e0a12SSteven Whitehouse /* Needs to be done before glock release & also in a transaction */ 13279e6e0a12SSteven Whitehouse truncate_inode_pages(&inode->i_data, 0); 13289e6e0a12SSteven Whitehouse gfs2_trans_end(sdp); 13299e6e0a12SSteven Whitehouse 13309e6e0a12SSteven Whitehouse out_unlock: 13319e6e0a12SSteven Whitehouse if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) 13329e6e0a12SSteven Whitehouse gfs2_glock_dq(&ip->i_iopen_gh); 13339e6e0a12SSteven Whitehouse gfs2_holder_uninit(&ip->i_iopen_gh); 13349e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&gh); 13359e6e0a12SSteven Whitehouse if (error && error != GLR_TRYFAILED && error != -EROFS) 13369e6e0a12SSteven Whitehouse fs_warn(sdp, "gfs2_delete_inode: %d\n", error); 13379e6e0a12SSteven Whitehouse out: 13389e6e0a12SSteven Whitehouse truncate_inode_pages(&inode->i_data, 0); 13399e6e0a12SSteven Whitehouse clear_inode(inode); 13409e6e0a12SSteven Whitehouse } 13419e6e0a12SSteven Whitehouse 13429e6e0a12SSteven Whitehouse static struct inode *gfs2_alloc_inode(struct super_block *sb) 13439e6e0a12SSteven Whitehouse { 13449e6e0a12SSteven Whitehouse struct gfs2_inode *ip; 13459e6e0a12SSteven Whitehouse 13469e6e0a12SSteven Whitehouse ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); 13479e6e0a12SSteven Whitehouse if (ip) { 13489e6e0a12SSteven Whitehouse ip->i_flags = 0; 13499e6e0a12SSteven Whitehouse ip->i_gl = NULL; 13509e6e0a12SSteven Whitehouse } 13519e6e0a12SSteven Whitehouse return &ip->i_inode; 13529e6e0a12SSteven Whitehouse } 13539e6e0a12SSteven Whitehouse 13549e6e0a12SSteven Whitehouse static void gfs2_destroy_inode(struct inode *inode) 13559e6e0a12SSteven Whitehouse { 13569e6e0a12SSteven Whitehouse kmem_cache_free(gfs2_inode_cachep, inode); 13579e6e0a12SSteven Whitehouse } 13589e6e0a12SSteven Whitehouse 13599e6e0a12SSteven Whitehouse const struct super_operations gfs2_super_ops = { 13609e6e0a12SSteven Whitehouse .alloc_inode = gfs2_alloc_inode, 13619e6e0a12SSteven Whitehouse .destroy_inode = gfs2_destroy_inode, 13629e6e0a12SSteven Whitehouse .write_inode = gfs2_write_inode, 13639e6e0a12SSteven Whitehouse .delete_inode = gfs2_delete_inode, 13649e6e0a12SSteven Whitehouse .put_super = gfs2_put_super, 13659e6e0a12SSteven Whitehouse .sync_fs = gfs2_sync_fs, 13669e6e0a12SSteven Whitehouse .freeze_fs = gfs2_freeze, 13679e6e0a12SSteven Whitehouse .unfreeze_fs = gfs2_unfreeze, 13689e6e0a12SSteven Whitehouse .statfs = gfs2_statfs, 13699e6e0a12SSteven Whitehouse .remount_fs = gfs2_remount_fs, 13709e6e0a12SSteven Whitehouse .clear_inode = gfs2_clear_inode, 13719e6e0a12SSteven Whitehouse .drop_inode = gfs2_drop_inode, 13729e6e0a12SSteven Whitehouse .show_options = gfs2_show_options, 13739e6e0a12SSteven Whitehouse }; 13749e6e0a12SSteven Whitehouse 1375