17336d0e6SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2b3b94faaSDavid Teigland /* 3b3b94faaSDavid Teigland * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4da6dd40dSBob Peterson * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. 5b3b94faaSDavid Teigland */ 6b3b94faaSDavid Teigland 7d77d1b58SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 8d77d1b58SJoe Perches 99e6e0a12SSteven Whitehouse #include <linux/bio.h> 10174cd4b1SIngo Molnar #include <linux/sched/signal.h> 11b3b94faaSDavid Teigland #include <linux/slab.h> 12b3b94faaSDavid Teigland #include <linux/spinlock.h> 13b3b94faaSDavid Teigland #include <linux/completion.h> 14b3b94faaSDavid Teigland #include <linux/buffer_head.h> 159e6e0a12SSteven Whitehouse #include <linux/statfs.h> 169e6e0a12SSteven Whitehouse #include <linux/seq_file.h> 179e6e0a12SSteven Whitehouse #include <linux/mount.h> 189e6e0a12SSteven Whitehouse #include <linux/kthread.h> 199e6e0a12SSteven Whitehouse #include <linux/delay.h> 205c676f6dSSteven Whitehouse #include <linux/gfs2_ondisk.h> 219e6e0a12SSteven Whitehouse #include <linux/crc32.h> 229e6e0a12SSteven Whitehouse #include <linux/time.h> 23e402746aSSteven Whitehouse #include <linux/wait.h> 24a9185b41SChristoph Hellwig #include <linux/writeback.h> 254667a0ecSSteven Whitehouse #include <linux/backing-dev.h> 262e60d768SBenjamin Marzinski #include <linux/kernel.h> 27b3b94faaSDavid Teigland 28b3b94faaSDavid Teigland #include "gfs2.h" 295c676f6dSSteven Whitehouse #include "incore.h" 30b3b94faaSDavid Teigland #include "bmap.h" 31b3b94faaSDavid Teigland #include "dir.h" 32b3b94faaSDavid Teigland #include "glock.h" 33b3b94faaSDavid Teigland #include "glops.h" 34b3b94faaSDavid Teigland #include "inode.h" 35b3b94faaSDavid Teigland #include "log.h" 36b3b94faaSDavid Teigland #include "meta_io.h" 37b3b94faaSDavid Teigland #include "quota.h" 38b3b94faaSDavid Teigland #include "recovery.h" 39b3b94faaSDavid Teigland #include "rgrp.h" 40b3b94faaSDavid Teigland #include "super.h" 41b3b94faaSDavid Teigland #include "trans.h" 425c676f6dSSteven Whitehouse #include "util.h" 439e6e0a12SSteven Whitehouse #include "sys.h" 44307cf6e6SSteven Whitehouse #include "xattr.h" 45f4686c26SAbhi Das #include "lops.h" 469e6e0a12SSteven Whitehouse 4753dbc27eSBob Peterson enum dinode_demise { 4853dbc27eSBob Peterson SHOULD_DELETE_DINODE, 4953dbc27eSBob Peterson SHOULD_NOT_DELETE_DINODE, 5053dbc27eSBob Peterson SHOULD_DEFER_EVICTION, 5153dbc27eSBob Peterson }; 5253dbc27eSBob Peterson 53fefc03bfSSteven Whitehouse /** 54fefc03bfSSteven Whitehouse * gfs2_jindex_free - Clear all the journal index information 55fefc03bfSSteven Whitehouse * @sdp: The GFS2 superblock 56fefc03bfSSteven Whitehouse * 57fefc03bfSSteven Whitehouse */ 58fefc03bfSSteven Whitehouse 59fefc03bfSSteven Whitehouse void gfs2_jindex_free(struct gfs2_sbd *sdp) 60fefc03bfSSteven Whitehouse { 61b50f227bSSteven Whitehouse struct list_head list; 62fefc03bfSSteven Whitehouse struct gfs2_jdesc *jd; 63fefc03bfSSteven Whitehouse 64fefc03bfSSteven Whitehouse spin_lock(&sdp->sd_jindex_spin); 65fefc03bfSSteven Whitehouse list_add(&list, &sdp->sd_jindex_list); 66fefc03bfSSteven Whitehouse list_del_init(&sdp->sd_jindex_list); 67fefc03bfSSteven Whitehouse sdp->sd_journals = 0; 68fefc03bfSSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin); 69fefc03bfSSteven Whitehouse 70601ef0d5SBob Peterson sdp->sd_jdesc = NULL; 71fefc03bfSSteven Whitehouse while (!list_empty(&list)) { 72969183bcSAndreas Gruenbacher jd = list_first_entry(&list, struct gfs2_jdesc, jd_list); 73b50f227bSSteven Whitehouse gfs2_free_journal_extents(jd); 74fefc03bfSSteven Whitehouse list_del(&jd->jd_list); 75fefc03bfSSteven Whitehouse iput(jd->jd_inode); 76601ef0d5SBob Peterson jd->jd_inode = NULL; 77fefc03bfSSteven Whitehouse kfree(jd); 78fefc03bfSSteven Whitehouse } 79fefc03bfSSteven Whitehouse } 80fefc03bfSSteven Whitehouse 81b3b94faaSDavid Teigland static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) 82b3b94faaSDavid Teigland { 83b3b94faaSDavid Teigland struct gfs2_jdesc *jd; 84b3b94faaSDavid Teigland 85b3b94faaSDavid Teigland list_for_each_entry(jd, head, jd_list) { 86736b2f77SAndreas Gruenbacher if (jd->jd_jid == jid) 87b3b94faaSDavid Teigland return jd; 88b3b94faaSDavid Teigland } 89736b2f77SAndreas Gruenbacher return NULL; 90736b2f77SAndreas Gruenbacher } 91b3b94faaSDavid Teigland 92b3b94faaSDavid Teigland struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) 93b3b94faaSDavid Teigland { 94b3b94faaSDavid Teigland struct gfs2_jdesc *jd; 95b3b94faaSDavid Teigland 96b3b94faaSDavid Teigland spin_lock(&sdp->sd_jindex_spin); 97b3b94faaSDavid Teigland jd = jdesc_find_i(&sdp->sd_jindex_list, jid); 98b3b94faaSDavid Teigland spin_unlock(&sdp->sd_jindex_spin); 99b3b94faaSDavid Teigland 100b3b94faaSDavid Teigland return jd; 101b3b94faaSDavid Teigland } 102b3b94faaSDavid Teigland 103b3b94faaSDavid Teigland int gfs2_jdesc_check(struct gfs2_jdesc *jd) 104b3b94faaSDavid Teigland { 105feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode); 106feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); 107a2e0f799SSteven Whitehouse u64 size = i_size_read(jd->jd_inode); 108b3b94faaSDavid Teigland 10947a9a527SFabian Frederick if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, BIT(30))) 110b3b94faaSDavid Teigland return -EIO; 111b3b94faaSDavid Teigland 112a2e0f799SSteven Whitehouse jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift; 113a2e0f799SSteven Whitehouse 114a2e0f799SSteven Whitehouse if (gfs2_write_alloc_required(ip, 0, size)) { 115b3b94faaSDavid Teigland gfs2_consist_inode(ip); 116461cb419SBob Peterson return -EIO; 117b3b94faaSDavid Teigland } 118b3b94faaSDavid Teigland 119461cb419SBob Peterson return 0; 120b3b94faaSDavid Teigland } 121b3b94faaSDavid Teigland 122b3b94faaSDavid Teigland /** 123b3b94faaSDavid Teigland * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one 124b3b94faaSDavid Teigland * @sdp: the filesystem 125b3b94faaSDavid Teigland * 126b3b94faaSDavid Teigland * Returns: errno 127b3b94faaSDavid Teigland */ 128b3b94faaSDavid Teigland 129b3b94faaSDavid Teigland int gfs2_make_fs_rw(struct gfs2_sbd *sdp) 130b3b94faaSDavid Teigland { 131feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); 1325c676f6dSSteven Whitehouse struct gfs2_glock *j_gl = ip->i_gl; 13355167622SAl Viro struct gfs2_log_header_host head; 134b3b94faaSDavid Teigland int error; 135b3b94faaSDavid Teigland 1361a14d3a6SSteven Whitehouse j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); 137a28dc123SBob Peterson if (gfs2_withdrawn(sdp)) 138a28dc123SBob Peterson return -EIO; 139b3b94faaSDavid Teigland 140f4686c26SAbhi Das error = gfs2_find_jhead(sdp->sd_jdesc, &head, false); 141601ef0d5SBob Peterson if (error || gfs2_withdrawn(sdp)) 142a28dc123SBob Peterson return error; 143b3b94faaSDavid Teigland 144b3b94faaSDavid Teigland if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 145b3b94faaSDavid Teigland gfs2_consist(sdp); 146a28dc123SBob Peterson return -EIO; 147b3b94faaSDavid Teigland } 148b3b94faaSDavid Teigland 149b3b94faaSDavid Teigland /* Initialize some head of the log stuff */ 150b3b94faaSDavid Teigland sdp->sd_log_sequence = head.lh_sequence + 1; 151b3b94faaSDavid Teigland gfs2_log_pointers_init(sdp, head.lh_blkno); 152b3b94faaSDavid Teigland 153b3b94faaSDavid Teigland error = gfs2_quota_init(sdp); 154a28dc123SBob Peterson if (!error && !gfs2_withdrawn(sdp)) 155b3b94faaSDavid Teigland set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 156b3b94faaSDavid Teigland return error; 157b3b94faaSDavid Teigland } 158b3b94faaSDavid Teigland 1591946f70aSBenjamin Marzinski void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) 160bb8d8a6fSSteven Whitehouse { 161bb8d8a6fSSteven Whitehouse const struct gfs2_statfs_change *str = buf; 162bb8d8a6fSSteven Whitehouse 163bb8d8a6fSSteven Whitehouse sc->sc_total = be64_to_cpu(str->sc_total); 164bb8d8a6fSSteven Whitehouse sc->sc_free = be64_to_cpu(str->sc_free); 165bb8d8a6fSSteven Whitehouse sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); 166bb8d8a6fSSteven Whitehouse } 167bb8d8a6fSSteven Whitehouse 16873092698SAbhi Das void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) 169bb8d8a6fSSteven Whitehouse { 170bb8d8a6fSSteven Whitehouse struct gfs2_statfs_change *str = buf; 171bb8d8a6fSSteven Whitehouse 172bb8d8a6fSSteven Whitehouse str->sc_total = cpu_to_be64(sc->sc_total); 173bb8d8a6fSSteven Whitehouse str->sc_free = cpu_to_be64(sc->sc_free); 174bb8d8a6fSSteven Whitehouse str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); 175bb8d8a6fSSteven Whitehouse } 176bb8d8a6fSSteven Whitehouse 177b3b94faaSDavid Teigland int gfs2_statfs_init(struct gfs2_sbd *sdp) 178b3b94faaSDavid Teigland { 179feaa7bbaSSteven Whitehouse struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 180bd209cc0SAl Viro struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 181bd209cc0SAl Viro struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 18270c11ba8SBob Peterson struct buffer_head *m_bh; 183b3b94faaSDavid Teigland struct gfs2_holder gh; 184b3b94faaSDavid Teigland int error; 185b3b94faaSDavid Teigland 186b3b94faaSDavid Teigland error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 187b3b94faaSDavid Teigland &gh); 188b3b94faaSDavid Teigland if (error) 189b3b94faaSDavid Teigland return error; 190b3b94faaSDavid Teigland 191b3b94faaSDavid Teigland error = gfs2_meta_inode_buffer(m_ip, &m_bh); 192b3b94faaSDavid Teigland if (error) 193b3b94faaSDavid Teigland goto out; 194b3b94faaSDavid Teigland 195b3b94faaSDavid Teigland if (sdp->sd_args.ar_spectator) { 196b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin); 197b3b94faaSDavid Teigland gfs2_statfs_change_in(m_sc, m_bh->b_data + 198b3b94faaSDavid Teigland sizeof(struct gfs2_dinode)); 199b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin); 200b3b94faaSDavid Teigland } else { 201b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin); 202b3b94faaSDavid Teigland gfs2_statfs_change_in(m_sc, m_bh->b_data + 203b3b94faaSDavid Teigland sizeof(struct gfs2_dinode)); 20470c11ba8SBob Peterson gfs2_statfs_change_in(l_sc, sdp->sd_sc_bh->b_data + 205b3b94faaSDavid Teigland sizeof(struct gfs2_dinode)); 206b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin); 207b3b94faaSDavid Teigland 208b3b94faaSDavid Teigland } 209b3b94faaSDavid Teigland 210b3b94faaSDavid Teigland brelse(m_bh); 211b3b94faaSDavid Teigland out: 212b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&gh); 213b3b94faaSDavid Teigland return 0; 214b3b94faaSDavid Teigland } 215b3b94faaSDavid Teigland 216cd915493SSteven Whitehouse void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, 217cd915493SSteven Whitehouse s64 dinodes) 218b3b94faaSDavid Teigland { 219feaa7bbaSSteven Whitehouse struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 220bd209cc0SAl Viro struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 2213d3c10f2SBenjamin Marzinski struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 222c14f5735SBenjamin Marzinski s64 x, y; 223c14f5735SBenjamin Marzinski int need_sync = 0; 224b3b94faaSDavid Teigland 22570c11ba8SBob Peterson gfs2_trans_add_meta(l_ip->i_gl, sdp->sd_sc_bh); 226b3b94faaSDavid Teigland 227b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin); 228b3b94faaSDavid Teigland l_sc->sc_total += total; 229b3b94faaSDavid Teigland l_sc->sc_free += free; 230b3b94faaSDavid Teigland l_sc->sc_dinodes += dinodes; 23170c11ba8SBob Peterson gfs2_statfs_change_out(l_sc, sdp->sd_sc_bh->b_data + 23270c11ba8SBob Peterson sizeof(struct gfs2_dinode)); 233c14f5735SBenjamin Marzinski if (sdp->sd_args.ar_statfs_percent) { 234c14f5735SBenjamin Marzinski x = 100 * l_sc->sc_free; 235c14f5735SBenjamin Marzinski y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent; 236c14f5735SBenjamin Marzinski if (x >= y || x <= -y) 237c14f5735SBenjamin Marzinski need_sync = 1; 238c14f5735SBenjamin Marzinski } 239b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin); 240b3b94faaSDavid Teigland 241c14f5735SBenjamin Marzinski if (need_sync) 2423d3c10f2SBenjamin Marzinski gfs2_wake_up_statfs(sdp); 243b3b94faaSDavid Teigland } 244b3b94faaSDavid Teigland 24570c11ba8SBob Peterson void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh) 2461946f70aSBenjamin Marzinski { 2471946f70aSBenjamin Marzinski struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 2481946f70aSBenjamin Marzinski struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); 2491946f70aSBenjamin Marzinski struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 2501946f70aSBenjamin Marzinski struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 2511946f70aSBenjamin Marzinski 25270c11ba8SBob Peterson gfs2_trans_add_meta(l_ip->i_gl, sdp->sd_sc_bh); 253901c6c66SBob Peterson gfs2_trans_add_meta(m_ip->i_gl, m_bh); 2541946f70aSBenjamin Marzinski 2551946f70aSBenjamin Marzinski spin_lock(&sdp->sd_statfs_spin); 2561946f70aSBenjamin Marzinski m_sc->sc_total += l_sc->sc_total; 2571946f70aSBenjamin Marzinski m_sc->sc_free += l_sc->sc_free; 2581946f70aSBenjamin Marzinski m_sc->sc_dinodes += l_sc->sc_dinodes; 2591946f70aSBenjamin Marzinski memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); 26070c11ba8SBob Peterson memset(sdp->sd_sc_bh->b_data + sizeof(struct gfs2_dinode), 2611946f70aSBenjamin Marzinski 0, sizeof(struct gfs2_statfs_change)); 2621946f70aSBenjamin Marzinski gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); 263901c6c66SBob Peterson spin_unlock(&sdp->sd_statfs_spin); 2641946f70aSBenjamin Marzinski } 2651946f70aSBenjamin Marzinski 2668c42d637SSteven Whitehouse int gfs2_statfs_sync(struct super_block *sb, int type) 267b3b94faaSDavid Teigland { 2688c42d637SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 269feaa7bbaSSteven Whitehouse struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 270bd209cc0SAl Viro struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 271bd209cc0SAl Viro struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 272b3b94faaSDavid Teigland struct gfs2_holder gh; 27370c11ba8SBob Peterson struct buffer_head *m_bh; 274b3b94faaSDavid Teigland int error; 275b3b94faaSDavid Teigland 276b3b94faaSDavid Teigland error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, 277b3b94faaSDavid Teigland &gh); 278b3b94faaSDavid Teigland if (error) 2792e60d768SBenjamin Marzinski goto out; 280b3b94faaSDavid Teigland 281b3b94faaSDavid Teigland error = gfs2_meta_inode_buffer(m_ip, &m_bh); 282b3b94faaSDavid Teigland if (error) 2832e60d768SBenjamin Marzinski goto out_unlock; 284b3b94faaSDavid Teigland 285b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin); 286b3b94faaSDavid Teigland gfs2_statfs_change_in(m_sc, m_bh->b_data + 287b3b94faaSDavid Teigland sizeof(struct gfs2_dinode)); 288b3b94faaSDavid Teigland if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { 289b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin); 290b3b94faaSDavid Teigland goto out_bh; 291b3b94faaSDavid Teigland } 292b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin); 293b3b94faaSDavid Teigland 29470c11ba8SBob Peterson error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); 295b3b94faaSDavid Teigland if (error) 296b3b94faaSDavid Teigland goto out_bh; 297b3b94faaSDavid Teigland 29870c11ba8SBob Peterson update_statfs(sdp, m_bh); 2993d3c10f2SBenjamin Marzinski sdp->sd_statfs_force_sync = 0; 300b3b94faaSDavid Teigland 301b3b94faaSDavid Teigland gfs2_trans_end(sdp); 302b3b94faaSDavid Teigland 303b3b94faaSDavid Teigland out_bh: 304b3b94faaSDavid Teigland brelse(m_bh); 3052e60d768SBenjamin Marzinski out_unlock: 306b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&gh); 3072e60d768SBenjamin Marzinski out: 308b3b94faaSDavid Teigland return error; 309b3b94faaSDavid Teigland } 310b3b94faaSDavid Teigland 311b3b94faaSDavid Teigland struct lfcc { 312b3b94faaSDavid Teigland struct list_head list; 313b3b94faaSDavid Teigland struct gfs2_holder gh; 314b3b94faaSDavid Teigland }; 315b3b94faaSDavid Teigland 316b3b94faaSDavid Teigland /** 317b3b94faaSDavid Teigland * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all 318b3b94faaSDavid Teigland * journals are clean 319b3b94faaSDavid Teigland * @sdp: the file system 320b3b94faaSDavid Teigland * 321b3b94faaSDavid Teigland * Returns: errno 322b3b94faaSDavid Teigland */ 323b3b94faaSDavid Teigland 32452b1cdcbSBob Peterson static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp) 325b3b94faaSDavid Teigland { 3265c676f6dSSteven Whitehouse struct gfs2_inode *ip; 327b3b94faaSDavid Teigland struct gfs2_jdesc *jd; 328b3b94faaSDavid Teigland struct lfcc *lfcc; 329b3b94faaSDavid Teigland LIST_HEAD(list); 33055167622SAl Viro struct gfs2_log_header_host lh; 331b3b94faaSDavid Teigland int error; 332b3b94faaSDavid Teigland 333b3b94faaSDavid Teigland list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 334b3b94faaSDavid Teigland lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); 335b3b94faaSDavid Teigland if (!lfcc) { 336b3b94faaSDavid Teigland error = -ENOMEM; 337b3b94faaSDavid Teigland goto out; 338b3b94faaSDavid Teigland } 339feaa7bbaSSteven Whitehouse ip = GFS2_I(jd->jd_inode); 340feaa7bbaSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); 341b3b94faaSDavid Teigland if (error) { 342b3b94faaSDavid Teigland kfree(lfcc); 343b3b94faaSDavid Teigland goto out; 344b3b94faaSDavid Teigland } 345b3b94faaSDavid Teigland list_add(&lfcc->list, &list); 346b3b94faaSDavid Teigland } 347b3b94faaSDavid Teigland 34824972557SBenjamin Marzinski error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE, 349ebdc416cSAndreas Gruenbacher LM_FLAG_NOEXP | GL_NOPID, 350ebdc416cSAndreas Gruenbacher &sdp->sd_freeze_gh); 35152b1cdcbSBob Peterson if (error) 35252b1cdcbSBob Peterson goto out; 353b3b94faaSDavid Teigland 354b3b94faaSDavid Teigland list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 355b3b94faaSDavid Teigland error = gfs2_jdesc_check(jd); 356b3b94faaSDavid Teigland if (error) 357b3b94faaSDavid Teigland break; 358f4686c26SAbhi Das error = gfs2_find_jhead(jd, &lh, false); 359b3b94faaSDavid Teigland if (error) 360b3b94faaSDavid Teigland break; 361b3b94faaSDavid Teigland if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { 362b3b94faaSDavid Teigland error = -EBUSY; 363b3b94faaSDavid Teigland break; 364b3b94faaSDavid Teigland } 365b3b94faaSDavid Teigland } 366b3b94faaSDavid Teigland 367b3b94faaSDavid Teigland if (error) 368c77b52c0SBob Peterson gfs2_freeze_unlock(&sdp->sd_freeze_gh); 369b3b94faaSDavid Teigland 370b3b94faaSDavid Teigland out: 371b3b94faaSDavid Teigland while (!list_empty(&list)) { 372969183bcSAndreas Gruenbacher lfcc = list_first_entry(&list, struct lfcc, list); 373b3b94faaSDavid Teigland list_del(&lfcc->list); 374b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&lfcc->gh); 375b3b94faaSDavid Teigland kfree(lfcc); 376b3b94faaSDavid Teigland } 377b3b94faaSDavid Teigland return error; 378b3b94faaSDavid Teigland } 379b3b94faaSDavid Teigland 3809eed04cdSSteven Whitehouse void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) 3819eed04cdSSteven Whitehouse { 3829eed04cdSSteven Whitehouse struct gfs2_dinode *str = buf; 3839eed04cdSSteven Whitehouse 3849eed04cdSSteven Whitehouse str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); 3859eed04cdSSteven Whitehouse str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); 3869eed04cdSSteven Whitehouse str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); 3879eed04cdSSteven Whitehouse str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); 3889eed04cdSSteven Whitehouse str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); 3899eed04cdSSteven Whitehouse str->di_mode = cpu_to_be32(ip->i_inode.i_mode); 390d0546426SEric W. Biederman str->di_uid = cpu_to_be32(i_uid_read(&ip->i_inode)); 391d0546426SEric W. Biederman str->di_gid = cpu_to_be32(i_gid_read(&ip->i_inode)); 3929eed04cdSSteven Whitehouse str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); 3939eed04cdSSteven Whitehouse str->di_size = cpu_to_be64(i_size_read(&ip->i_inode)); 3949eed04cdSSteven Whitehouse str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); 3959eed04cdSSteven Whitehouse str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); 3969eed04cdSSteven Whitehouse str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); 3979eed04cdSSteven Whitehouse str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); 3989eed04cdSSteven Whitehouse 3999eed04cdSSteven Whitehouse str->di_goal_meta = cpu_to_be64(ip->i_goal); 4009eed04cdSSteven Whitehouse str->di_goal_data = cpu_to_be64(ip->i_goal); 4019eed04cdSSteven Whitehouse str->di_generation = cpu_to_be64(ip->i_generation); 4029eed04cdSSteven Whitehouse 4039eed04cdSSteven Whitehouse str->di_flags = cpu_to_be32(ip->i_diskflags); 4049eed04cdSSteven Whitehouse str->di_height = cpu_to_be16(ip->i_height); 4059eed04cdSSteven Whitehouse str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && 4069eed04cdSSteven Whitehouse !(ip->i_diskflags & GFS2_DIF_EXHASH) ? 4079eed04cdSSteven Whitehouse GFS2_FORMAT_DE : 0); 4089eed04cdSSteven Whitehouse str->di_depth = cpu_to_be16(ip->i_depth); 4099eed04cdSSteven Whitehouse str->di_entries = cpu_to_be32(ip->i_entries); 4109eed04cdSSteven Whitehouse 4119eed04cdSSteven Whitehouse str->di_eattr = cpu_to_be64(ip->i_eattr); 4129eed04cdSSteven Whitehouse str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); 4139eed04cdSSteven Whitehouse str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); 4149eed04cdSSteven Whitehouse str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); 4159eed04cdSSteven Whitehouse } 4169e6e0a12SSteven Whitehouse 4179e6e0a12SSteven Whitehouse /** 4189e6e0a12SSteven Whitehouse * gfs2_write_inode - Make sure the inode is stable on the disk 4199e6e0a12SSteven Whitehouse * @inode: The inode 4201027efaaSSteven Whitehouse * @wbc: The writeback control structure 4219e6e0a12SSteven Whitehouse * 4229e6e0a12SSteven Whitehouse * Returns: errno 4239e6e0a12SSteven Whitehouse */ 4249e6e0a12SSteven Whitehouse 425a9185b41SChristoph Hellwig static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc) 4269e6e0a12SSteven Whitehouse { 4279e6e0a12SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 4289e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 4291027efaaSSteven Whitehouse struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl); 430de1414a6SChristoph Hellwig struct backing_dev_info *bdi = inode_to_bdi(metamapping->host); 431ab9bbda0SSteven Whitehouse int ret = 0; 432adbc3ddfSBob Peterson bool flush_all = (wbc->sync_mode == WB_SYNC_ALL || gfs2_is_jdata(ip)); 4339e6e0a12SSteven Whitehouse 434adbc3ddfSBob Peterson if (flush_all) 435c1696fb8SBob Peterson gfs2_log_flush(GFS2_SB(inode), ip->i_gl, 436805c0907SBob Peterson GFS2_LOG_HEAD_FLUSH_NORMAL | 437805c0907SBob Peterson GFS2_LFC_WRITE_INODE); 438a88a341aSTejun Heo if (bdi->wb.dirty_exceeded) 4394667a0ecSSteven Whitehouse gfs2_ail1_flush(sdp, wbc); 4401d4ec642SSteven Whitehouse else 4411d4ec642SSteven Whitehouse filemap_fdatawrite(metamapping); 442adbc3ddfSBob Peterson if (flush_all) 4431027efaaSSteven Whitehouse ret = filemap_fdatawait(metamapping); 4441027efaaSSteven Whitehouse if (ret) 4451027efaaSSteven Whitehouse mark_inode_dirty_sync(inode); 446957a7acdSAbhi Das else { 447957a7acdSAbhi Das spin_lock(&inode->i_lock); 448957a7acdSAbhi Das if (!(inode->i_flags & I_DIRTY)) 449957a7acdSAbhi Das gfs2_ordered_del_inode(ip); 450957a7acdSAbhi Das spin_unlock(&inode->i_lock); 451957a7acdSAbhi Das } 4529e6e0a12SSteven Whitehouse return ret; 4539e6e0a12SSteven Whitehouse } 4549e6e0a12SSteven Whitehouse 4559e6e0a12SSteven Whitehouse /** 456ab9bbda0SSteven Whitehouse * gfs2_dirty_inode - check for atime updates 457ab9bbda0SSteven Whitehouse * @inode: The inode in question 458ab9bbda0SSteven Whitehouse * @flags: The type of dirty 459ab9bbda0SSteven Whitehouse * 460ab9bbda0SSteven Whitehouse * Unfortunately it can be called under any combination of inode 461ab9bbda0SSteven Whitehouse * glock and transaction lock, so we have to check carefully. 462ab9bbda0SSteven Whitehouse * 463ab9bbda0SSteven Whitehouse * At the moment this deals only with atime - it should be possible 464ab9bbda0SSteven Whitehouse * to expand that role in future, once a review of the locking has 465ab9bbda0SSteven Whitehouse * been carried out. 466ab9bbda0SSteven Whitehouse */ 467ab9bbda0SSteven Whitehouse 468ab9bbda0SSteven Whitehouse static void gfs2_dirty_inode(struct inode *inode, int flags) 469ab9bbda0SSteven Whitehouse { 470ab9bbda0SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 471ab9bbda0SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 472ab9bbda0SSteven Whitehouse struct buffer_head *bh; 473ab9bbda0SSteven Whitehouse struct gfs2_holder gh; 474ab9bbda0SSteven Whitehouse int need_unlock = 0; 475ab9bbda0SSteven Whitehouse int need_endtrans = 0; 476ab9bbda0SSteven Whitehouse int ret; 477ab9bbda0SSteven Whitehouse 478*38552ff6SAndreas Gruenbacher if (unlikely(!ip->i_gl)) { 479*38552ff6SAndreas Gruenbacher /* This can only happen during incomplete inode creation. */ 480*38552ff6SAndreas Gruenbacher BUG_ON(!test_bit(GIF_ALLOC_FAILED, &ip->i_flags)); 481*38552ff6SAndreas Gruenbacher return; 482*38552ff6SAndreas Gruenbacher } 483*38552ff6SAndreas Gruenbacher 484eb43e660SBob Peterson if (unlikely(gfs2_withdrawn(sdp))) 4850d1c7ae9SBob Peterson return; 486ab9bbda0SSteven Whitehouse if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { 487ab9bbda0SSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 488ab9bbda0SSteven Whitehouse if (ret) { 489ab9bbda0SSteven Whitehouse fs_err(sdp, "dirty_inode: glock %d\n", ret); 490e28c02b9SBob Peterson gfs2_dump_glock(NULL, ip->i_gl, true); 491ab9bbda0SSteven Whitehouse return; 492ab9bbda0SSteven Whitehouse } 493ab9bbda0SSteven Whitehouse need_unlock = 1; 4943d162688SBenjamin Marzinski } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE)) 4953d162688SBenjamin Marzinski return; 496ab9bbda0SSteven Whitehouse 497ab9bbda0SSteven Whitehouse if (current->journal_info == NULL) { 498ab9bbda0SSteven Whitehouse ret = gfs2_trans_begin(sdp, RES_DINODE, 0); 499ab9bbda0SSteven Whitehouse if (ret) { 500ab9bbda0SSteven Whitehouse fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret); 501ab9bbda0SSteven Whitehouse goto out; 502ab9bbda0SSteven Whitehouse } 503ab9bbda0SSteven Whitehouse need_endtrans = 1; 504ab9bbda0SSteven Whitehouse } 505ab9bbda0SSteven Whitehouse 506ab9bbda0SSteven Whitehouse ret = gfs2_meta_inode_buffer(ip, &bh); 507ab9bbda0SSteven Whitehouse if (ret == 0) { 508350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, bh); 509ab9bbda0SSteven Whitehouse gfs2_dinode_out(ip, bh->b_data); 510ab9bbda0SSteven Whitehouse brelse(bh); 511ab9bbda0SSteven Whitehouse } 512ab9bbda0SSteven Whitehouse 513ab9bbda0SSteven Whitehouse if (need_endtrans) 514ab9bbda0SSteven Whitehouse gfs2_trans_end(sdp); 515ab9bbda0SSteven Whitehouse out: 516ab9bbda0SSteven Whitehouse if (need_unlock) 517ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&gh); 518ab9bbda0SSteven Whitehouse } 519ab9bbda0SSteven Whitehouse 520ab9bbda0SSteven Whitehouse /** 5219e6e0a12SSteven Whitehouse * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one 5229e6e0a12SSteven Whitehouse * @sdp: the filesystem 5239e6e0a12SSteven Whitehouse * 5249e6e0a12SSteven Whitehouse * Returns: errno 5259e6e0a12SSteven Whitehouse */ 5269e6e0a12SSteven Whitehouse 527eb602521SYang Li void gfs2_make_fs_ro(struct gfs2_sbd *sdp) 5289e6e0a12SSteven Whitehouse { 529601ef0d5SBob Peterson int log_write_allowed = test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); 5309e6e0a12SSteven Whitehouse 531a0e3cc65SAndreas Gruenbacher gfs2_flush_delete_work(sdp); 532601ef0d5SBob Peterson if (!log_write_allowed && current == sdp->sd_quotad_process) 533601ef0d5SBob Peterson fs_warn(sdp, "The quotad daemon is withdrawing.\n"); 534601ef0d5SBob Peterson else if (sdp->sd_quotad_process) 5358ad151c2SSteven Whitehouse kthread_stop(sdp->sd_quotad_process); 5365b3a9f34SBob Peterson sdp->sd_quotad_process = NULL; 537601ef0d5SBob Peterson 538601ef0d5SBob Peterson if (!log_write_allowed && current == sdp->sd_logd_process) 539601ef0d5SBob Peterson fs_warn(sdp, "The logd daemon is withdrawing.\n"); 540601ef0d5SBob Peterson else if (sdp->sd_logd_process) 5418ad151c2SSteven Whitehouse kthread_stop(sdp->sd_logd_process); 5425b3a9f34SBob Peterson sdp->sd_logd_process = NULL; 5438ad151c2SSteven Whitehouse 544601ef0d5SBob Peterson if (log_write_allowed) { 545ceed1723SJan Kara gfs2_quota_sync(sdp->sd_vfs, 0); 5468c42d637SSteven Whitehouse gfs2_statfs_sync(sdp->sd_vfs, 0); 5479e6e0a12SSteven Whitehouse 548805c0907SBob Peterson gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN | 549805c0907SBob Peterson GFS2_LFC_MAKE_FS_RO); 550f3708fb5SAndreas Gruenbacher wait_event_timeout(sdp->sd_log_waitq, 551f3708fb5SAndreas Gruenbacher gfs2_log_is_empty(sdp), 552f3708fb5SAndreas Gruenbacher HZ * 5); 553f3708fb5SAndreas Gruenbacher gfs2_assert_warn(sdp, gfs2_log_is_empty(sdp)); 554601ef0d5SBob Peterson } else { 555f3708fb5SAndreas Gruenbacher wait_event_timeout(sdp->sd_log_waitq, 556f3708fb5SAndreas Gruenbacher gfs2_log_is_empty(sdp), 557601ef0d5SBob Peterson HZ * 5); 558601ef0d5SBob Peterson } 5599e6e0a12SSteven Whitehouse gfs2_quota_cleanup(sdp); 5609e6e0a12SSteven Whitehouse 561601ef0d5SBob Peterson if (!log_write_allowed) 562601ef0d5SBob Peterson sdp->sd_vfs->s_flags |= SB_RDONLY; 5639e6e0a12SSteven Whitehouse } 5649e6e0a12SSteven Whitehouse 5659e6e0a12SSteven Whitehouse /** 5669e6e0a12SSteven Whitehouse * gfs2_put_super - Unmount the filesystem 5679e6e0a12SSteven Whitehouse * @sb: The VFS superblock 5689e6e0a12SSteven Whitehouse * 5699e6e0a12SSteven Whitehouse */ 5709e6e0a12SSteven Whitehouse 5719e6e0a12SSteven Whitehouse static void gfs2_put_super(struct super_block *sb) 5729e6e0a12SSteven Whitehouse { 5739e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 5749e6e0a12SSteven Whitehouse struct gfs2_jdesc *jd; 5759e6e0a12SSteven Whitehouse 5769e6e0a12SSteven Whitehouse /* No more recovery requests */ 5779e6e0a12SSteven Whitehouse set_bit(SDF_NORECOVERY, &sdp->sd_flags); 5789e6e0a12SSteven Whitehouse smp_mb(); 5799e6e0a12SSteven Whitehouse 5809e6e0a12SSteven Whitehouse /* Wait on outstanding recovery */ 5819e6e0a12SSteven Whitehouse restart: 5829e6e0a12SSteven Whitehouse spin_lock(&sdp->sd_jindex_spin); 5839e6e0a12SSteven Whitehouse list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 5849e6e0a12SSteven Whitehouse if (!test_bit(JDF_RECOVERY, &jd->jd_flags)) 5859e6e0a12SSteven Whitehouse continue; 5869e6e0a12SSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin); 5879e6e0a12SSteven Whitehouse wait_on_bit(&jd->jd_flags, JDF_RECOVERY, 58874316201SNeilBrown TASK_UNINTERRUPTIBLE); 5899e6e0a12SSteven Whitehouse goto restart; 5909e6e0a12SSteven Whitehouse } 5919e6e0a12SSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin); 5929e6e0a12SSteven Whitehouse 593bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 594eb602521SYang Li gfs2_make_fs_ro(sdp); 5959e6e0a12SSteven Whitehouse } 5965a61ae14SAndreas Gruenbacher WARN_ON(gfs2_withdrawing(sdp)); 5975a61ae14SAndreas Gruenbacher 5989e6e0a12SSteven Whitehouse /* At this point, we're through modifying the disk */ 5999e6e0a12SSteven Whitehouse 6009e6e0a12SSteven Whitehouse /* Release stuff */ 6019e6e0a12SSteven Whitehouse 6029e6e0a12SSteven Whitehouse iput(sdp->sd_jindex); 6039e6e0a12SSteven Whitehouse iput(sdp->sd_statfs_inode); 6049e6e0a12SSteven Whitehouse iput(sdp->sd_rindex); 6059e6e0a12SSteven Whitehouse iput(sdp->sd_quota_inode); 6069e6e0a12SSteven Whitehouse 6079e6e0a12SSteven Whitehouse gfs2_glock_put(sdp->sd_rename_gl); 60824972557SBenjamin Marzinski gfs2_glock_put(sdp->sd_freeze_gl); 6099e6e0a12SSteven Whitehouse 6109e6e0a12SSteven Whitehouse if (!sdp->sd_args.ar_spectator) { 611601ef0d5SBob Peterson if (gfs2_holder_initialized(&sdp->sd_journal_gh)) 6129e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_journal_gh); 613601ef0d5SBob Peterson if (gfs2_holder_initialized(&sdp->sd_jinode_gh)) 6149e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); 61570c11ba8SBob Peterson brelse(sdp->sd_sc_bh); 6169e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_sc_gh); 6179e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_qc_gh); 61897fd734bSAbhi Das free_local_statfs_inodes(sdp); 6199e6e0a12SSteven Whitehouse iput(sdp->sd_qc_inode); 6209e6e0a12SSteven Whitehouse } 6219e6e0a12SSteven Whitehouse 6229e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_live_gh); 6239e6e0a12SSteven Whitehouse gfs2_clear_rgrpd(sdp); 6249e6e0a12SSteven Whitehouse gfs2_jindex_free(sdp); 6259e6e0a12SSteven Whitehouse /* Take apart glock structures and buffer lists */ 6269e6e0a12SSteven Whitehouse gfs2_gl_hash_clear(sdp); 627a9dd945cSBob Peterson truncate_inode_pages_final(&sdp->sd_aspace); 628b2fb7dabSBob Peterson gfs2_delete_debugfs_file(sdp); 6299e6e0a12SSteven Whitehouse /* Unmount the locking protocol */ 6309e6e0a12SSteven Whitehouse gfs2_lm_unmount(sdp); 6319e6e0a12SSteven Whitehouse 6329e6e0a12SSteven Whitehouse /* At this point, we're through participating in the lockspace */ 6339e6e0a12SSteven Whitehouse gfs2_sys_fs_del(sdp); 634c2a04b02SJamie Iles free_sbd(sdp); 6359e6e0a12SSteven Whitehouse } 6369e6e0a12SSteven Whitehouse 6379e6e0a12SSteven Whitehouse /** 6389e6e0a12SSteven Whitehouse * gfs2_sync_fs - sync the filesystem 6399e6e0a12SSteven Whitehouse * @sb: the superblock 640c551f66cSLee Jones * @wait: true to wait for completion 6419e6e0a12SSteven Whitehouse * 6429e6e0a12SSteven Whitehouse * Flushes the log to disk. 6439e6e0a12SSteven Whitehouse */ 6449e6e0a12SSteven Whitehouse 6459e6e0a12SSteven Whitehouse static int gfs2_sync_fs(struct super_block *sb, int wait) 6469e6e0a12SSteven Whitehouse { 6471027efaaSSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 648a1177825SJan Kara 649a1177825SJan Kara gfs2_quota_sync(sb, -1); 650942b0cddSBob Peterson if (wait) 651805c0907SBob Peterson gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL | 652805c0907SBob Peterson GFS2_LFC_SYNC_FS); 653942b0cddSBob Peterson return sdp->sd_log_error; 6549e6e0a12SSteven Whitehouse } 6559e6e0a12SSteven Whitehouse 6562e60d768SBenjamin Marzinski void gfs2_freeze_func(struct work_struct *work) 6572e60d768SBenjamin Marzinski { 6582e60d768SBenjamin Marzinski int error; 6592e60d768SBenjamin Marzinski struct gfs2_holder freeze_gh; 6602e60d768SBenjamin Marzinski struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work); 6612e60d768SBenjamin Marzinski struct super_block *sb = sdp->sd_vfs; 6622e60d768SBenjamin Marzinski 6632e60d768SBenjamin Marzinski atomic_inc(&sb->s_active); 664c77b52c0SBob Peterson error = gfs2_freeze_lock(sdp, &freeze_gh, 0); 6652e60d768SBenjamin Marzinski if (error) { 6662e60d768SBenjamin Marzinski gfs2_assert_withdraw(sdp, 0); 6678f918219SAbhi Das } else { 6682e60d768SBenjamin Marzinski atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); 6692e60d768SBenjamin Marzinski error = thaw_super(sb); 6702e60d768SBenjamin Marzinski if (error) { 671f29e62eeSBob Peterson fs_info(sdp, "GFS2: couldn't thaw filesystem: %d\n", 6722e60d768SBenjamin Marzinski error); 6732e60d768SBenjamin Marzinski gfs2_assert_withdraw(sdp, 0); 6742e60d768SBenjamin Marzinski } 675c77b52c0SBob Peterson gfs2_freeze_unlock(&freeze_gh); 6762e60d768SBenjamin Marzinski } 6772e60d768SBenjamin Marzinski deactivate_super(sb); 6788f918219SAbhi Das clear_bit_unlock(SDF_FS_FROZEN, &sdp->sd_flags); 6798f918219SAbhi Das wake_up_bit(&sdp->sd_flags, SDF_FS_FROZEN); 6802e60d768SBenjamin Marzinski return; 6812e60d768SBenjamin Marzinski } 6822e60d768SBenjamin Marzinski 6839e6e0a12SSteven Whitehouse /** 6849e6e0a12SSteven Whitehouse * gfs2_freeze - prevent further writes to the filesystem 6859e6e0a12SSteven Whitehouse * @sb: the VFS structure for the filesystem 6869e6e0a12SSteven Whitehouse * 6879e6e0a12SSteven Whitehouse */ 6889e6e0a12SSteven Whitehouse 6899e6e0a12SSteven Whitehouse static int gfs2_freeze(struct super_block *sb) 6909e6e0a12SSteven Whitehouse { 6919e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 692ff132c5fSBob Peterson int error; 6939e6e0a12SSteven Whitehouse 6942e60d768SBenjamin Marzinski mutex_lock(&sdp->sd_freeze_mutex); 695ff132c5fSBob Peterson if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN) { 696ff132c5fSBob Peterson error = -EBUSY; 6972e60d768SBenjamin Marzinski goto out; 698ff132c5fSBob Peterson } 6992e60d768SBenjamin Marzinski 70060528afaSBob Peterson for (;;) { 701eb43e660SBob Peterson if (gfs2_withdrawn(sdp)) { 7022e60d768SBenjamin Marzinski error = -EINVAL; 7032e60d768SBenjamin Marzinski goto out; 7042e60d768SBenjamin Marzinski } 7059e6e0a12SSteven Whitehouse 70652b1cdcbSBob Peterson error = gfs2_lock_fs_check_clean(sdp); 7079e6e0a12SSteven Whitehouse if (!error) 7089e6e0a12SSteven Whitehouse break; 7099e6e0a12SSteven Whitehouse 71055317f5bSBob Peterson if (error == -EBUSY) 7119e6e0a12SSteven Whitehouse fs_err(sdp, "waiting for recovery before freeze\n"); 71252b1cdcbSBob Peterson else if (error == -EIO) { 71352b1cdcbSBob Peterson fs_err(sdp, "Fatal IO error: cannot freeze gfs2 due " 71452b1cdcbSBob Peterson "to recovery error.\n"); 71552b1cdcbSBob Peterson goto out; 71652b1cdcbSBob Peterson } else { 7179e6e0a12SSteven Whitehouse fs_err(sdp, "error freezing FS: %d\n", error); 71852b1cdcbSBob Peterson } 7199e6e0a12SSteven Whitehouse fs_err(sdp, "retrying...\n"); 7209e6e0a12SSteven Whitehouse msleep(1000); 7219e6e0a12SSteven Whitehouse } 7228f918219SAbhi Das set_bit(SDF_FS_FROZEN, &sdp->sd_flags); 7232e60d768SBenjamin Marzinski out: 7242e60d768SBenjamin Marzinski mutex_unlock(&sdp->sd_freeze_mutex); 7252e60d768SBenjamin Marzinski return error; 7269e6e0a12SSteven Whitehouse } 7279e6e0a12SSteven Whitehouse 7289e6e0a12SSteven Whitehouse /** 7299e6e0a12SSteven Whitehouse * gfs2_unfreeze - reallow writes to the filesystem 7309e6e0a12SSteven Whitehouse * @sb: the VFS structure for the filesystem 7319e6e0a12SSteven Whitehouse * 7329e6e0a12SSteven Whitehouse */ 7339e6e0a12SSteven Whitehouse 7349e6e0a12SSteven Whitehouse static int gfs2_unfreeze(struct super_block *sb) 7359e6e0a12SSteven Whitehouse { 736d564053fSSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 737d564053fSSteven Whitehouse 7382e60d768SBenjamin Marzinski mutex_lock(&sdp->sd_freeze_mutex); 7392e60d768SBenjamin Marzinski if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN || 7406df9f9a2SAndreas Gruenbacher !gfs2_holder_initialized(&sdp->sd_freeze_gh)) { 7412e60d768SBenjamin Marzinski mutex_unlock(&sdp->sd_freeze_mutex); 742ff132c5fSBob Peterson return -EINVAL; 7432e60d768SBenjamin Marzinski } 7442e60d768SBenjamin Marzinski 745c77b52c0SBob Peterson gfs2_freeze_unlock(&sdp->sd_freeze_gh); 7462e60d768SBenjamin Marzinski mutex_unlock(&sdp->sd_freeze_mutex); 7478f918219SAbhi Das return wait_on_bit(&sdp->sd_flags, SDF_FS_FROZEN, TASK_INTERRUPTIBLE); 7489e6e0a12SSteven Whitehouse } 7499e6e0a12SSteven Whitehouse 7509e6e0a12SSteven Whitehouse /** 751c551f66cSLee Jones * statfs_slow_fill - fill in the sg for a given RG 7529e6e0a12SSteven Whitehouse * @rgd: the RG 7539e6e0a12SSteven Whitehouse * @sc: the sc structure 7549e6e0a12SSteven Whitehouse * 7559e6e0a12SSteven Whitehouse * Returns: 0 on success, -ESTALE if the LVB is invalid 7569e6e0a12SSteven Whitehouse */ 7579e6e0a12SSteven Whitehouse 7589e6e0a12SSteven Whitehouse static int statfs_slow_fill(struct gfs2_rgrpd *rgd, 7599e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host *sc) 7609e6e0a12SSteven Whitehouse { 7619e6e0a12SSteven Whitehouse gfs2_rgrp_verify(rgd); 7629e6e0a12SSteven Whitehouse sc->sc_total += rgd->rd_data; 7639e6e0a12SSteven Whitehouse sc->sc_free += rgd->rd_free; 7649e6e0a12SSteven Whitehouse sc->sc_dinodes += rgd->rd_dinodes; 7659e6e0a12SSteven Whitehouse return 0; 7669e6e0a12SSteven Whitehouse } 7679e6e0a12SSteven Whitehouse 7689e6e0a12SSteven Whitehouse /** 7699e6e0a12SSteven Whitehouse * gfs2_statfs_slow - Stat a filesystem using asynchronous locking 7709e6e0a12SSteven Whitehouse * @sdp: the filesystem 7719e6e0a12SSteven Whitehouse * @sc: the sc info that will be returned 7729e6e0a12SSteven Whitehouse * 7739e6e0a12SSteven Whitehouse * Any error (other than a signal) will cause this routine to fall back 7749e6e0a12SSteven Whitehouse * to the synchronous version. 7759e6e0a12SSteven Whitehouse * 7769e6e0a12SSteven Whitehouse * FIXME: This really shouldn't busy wait like this. 7779e6e0a12SSteven Whitehouse * 7789e6e0a12SSteven Whitehouse * Returns: errno 7799e6e0a12SSteven Whitehouse */ 7809e6e0a12SSteven Whitehouse 7819e6e0a12SSteven Whitehouse static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 7829e6e0a12SSteven Whitehouse { 7839e6e0a12SSteven Whitehouse struct gfs2_rgrpd *rgd_next; 7849e6e0a12SSteven Whitehouse struct gfs2_holder *gha, *gh; 7859e6e0a12SSteven Whitehouse unsigned int slots = 64; 7869e6e0a12SSteven Whitehouse unsigned int x; 7879e6e0a12SSteven Whitehouse int done; 7889e6e0a12SSteven Whitehouse int error = 0, err; 7899e6e0a12SSteven Whitehouse 7909e6e0a12SSteven Whitehouse memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); 7916da2ec56SKees Cook gha = kmalloc_array(slots, sizeof(struct gfs2_holder), GFP_KERNEL); 7929e6e0a12SSteven Whitehouse if (!gha) 7939e6e0a12SSteven Whitehouse return -ENOMEM; 7946df9f9a2SAndreas Gruenbacher for (x = 0; x < slots; x++) 7956df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(gha + x); 7969e6e0a12SSteven Whitehouse 7979e6e0a12SSteven Whitehouse rgd_next = gfs2_rgrpd_get_first(sdp); 7989e6e0a12SSteven Whitehouse 7999e6e0a12SSteven Whitehouse for (;;) { 8009e6e0a12SSteven Whitehouse done = 1; 8019e6e0a12SSteven Whitehouse 8029e6e0a12SSteven Whitehouse for (x = 0; x < slots; x++) { 8039e6e0a12SSteven Whitehouse gh = gha + x; 8049e6e0a12SSteven Whitehouse 8056df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) { 8069e6e0a12SSteven Whitehouse err = gfs2_glock_wait(gh); 8079e6e0a12SSteven Whitehouse if (err) { 8089e6e0a12SSteven Whitehouse gfs2_holder_uninit(gh); 8099e6e0a12SSteven Whitehouse error = err; 8109e6e0a12SSteven Whitehouse } else { 8116f6597baSAndreas Gruenbacher if (!error) { 8126f6597baSAndreas Gruenbacher struct gfs2_rgrpd *rgd = 8136f6597baSAndreas Gruenbacher gfs2_glock2rgrp(gh->gh_gl); 8146f6597baSAndreas Gruenbacher 8156f6597baSAndreas Gruenbacher error = statfs_slow_fill(rgd, sc); 8166f6597baSAndreas Gruenbacher } 8179e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(gh); 8189e6e0a12SSteven Whitehouse } 8199e6e0a12SSteven Whitehouse } 8209e6e0a12SSteven Whitehouse 8216df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(gh)) 8229e6e0a12SSteven Whitehouse done = 0; 8239e6e0a12SSteven Whitehouse else if (rgd_next && !error) { 8249e6e0a12SSteven Whitehouse error = gfs2_glock_nq_init(rgd_next->rd_gl, 8259e6e0a12SSteven Whitehouse LM_ST_SHARED, 8269e6e0a12SSteven Whitehouse GL_ASYNC, 8279e6e0a12SSteven Whitehouse gh); 8289e6e0a12SSteven Whitehouse rgd_next = gfs2_rgrpd_get_next(rgd_next); 8299e6e0a12SSteven Whitehouse done = 0; 8309e6e0a12SSteven Whitehouse } 8319e6e0a12SSteven Whitehouse 8329e6e0a12SSteven Whitehouse if (signal_pending(current)) 8339e6e0a12SSteven Whitehouse error = -ERESTARTSYS; 8349e6e0a12SSteven Whitehouse } 8359e6e0a12SSteven Whitehouse 8369e6e0a12SSteven Whitehouse if (done) 8379e6e0a12SSteven Whitehouse break; 8389e6e0a12SSteven Whitehouse 8399e6e0a12SSteven Whitehouse yield(); 8409e6e0a12SSteven Whitehouse } 8419e6e0a12SSteven Whitehouse 8429e6e0a12SSteven Whitehouse kfree(gha); 8439e6e0a12SSteven Whitehouse return error; 8449e6e0a12SSteven Whitehouse } 8459e6e0a12SSteven Whitehouse 8469e6e0a12SSteven Whitehouse /** 8479e6e0a12SSteven Whitehouse * gfs2_statfs_i - Do a statfs 8489e6e0a12SSteven Whitehouse * @sdp: the filesystem 849c551f66cSLee Jones * @sc: the sc structure 8509e6e0a12SSteven Whitehouse * 8519e6e0a12SSteven Whitehouse * Returns: errno 8529e6e0a12SSteven Whitehouse */ 8539e6e0a12SSteven Whitehouse 8549e6e0a12SSteven Whitehouse static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) 8559e6e0a12SSteven Whitehouse { 8569e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 8579e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 8589e6e0a12SSteven Whitehouse 8599e6e0a12SSteven Whitehouse spin_lock(&sdp->sd_statfs_spin); 8609e6e0a12SSteven Whitehouse 8619e6e0a12SSteven Whitehouse *sc = *m_sc; 8629e6e0a12SSteven Whitehouse sc->sc_total += l_sc->sc_total; 8639e6e0a12SSteven Whitehouse sc->sc_free += l_sc->sc_free; 8649e6e0a12SSteven Whitehouse sc->sc_dinodes += l_sc->sc_dinodes; 8659e6e0a12SSteven Whitehouse 8669e6e0a12SSteven Whitehouse spin_unlock(&sdp->sd_statfs_spin); 8679e6e0a12SSteven Whitehouse 8689e6e0a12SSteven Whitehouse if (sc->sc_free < 0) 8699e6e0a12SSteven Whitehouse sc->sc_free = 0; 8709e6e0a12SSteven Whitehouse if (sc->sc_free > sc->sc_total) 8719e6e0a12SSteven Whitehouse sc->sc_free = sc->sc_total; 8729e6e0a12SSteven Whitehouse if (sc->sc_dinodes < 0) 8739e6e0a12SSteven Whitehouse sc->sc_dinodes = 0; 8749e6e0a12SSteven Whitehouse 8759e6e0a12SSteven Whitehouse return 0; 8769e6e0a12SSteven Whitehouse } 8779e6e0a12SSteven Whitehouse 8789e6e0a12SSteven Whitehouse /** 8799e6e0a12SSteven Whitehouse * gfs2_statfs - Gather and return stats about the filesystem 880c551f66cSLee Jones * @dentry: The name of the link 881c551f66cSLee Jones * @buf: The buffer 8829e6e0a12SSteven Whitehouse * 8839e6e0a12SSteven Whitehouse * Returns: 0 on success or error code 8849e6e0a12SSteven Whitehouse */ 8859e6e0a12SSteven Whitehouse 8869e6e0a12SSteven Whitehouse static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf) 8879e6e0a12SSteven Whitehouse { 888fc64005cSAl Viro struct super_block *sb = dentry->d_sb; 8899e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 8909e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host sc; 8919e6e0a12SSteven Whitehouse int error; 8929e6e0a12SSteven Whitehouse 8938339ee54SSteven Whitehouse error = gfs2_rindex_update(sdp); 8948339ee54SSteven Whitehouse if (error) 8958339ee54SSteven Whitehouse return error; 8968339ee54SSteven Whitehouse 8979e6e0a12SSteven Whitehouse if (gfs2_tune_get(sdp, gt_statfs_slow)) 8989e6e0a12SSteven Whitehouse error = gfs2_statfs_slow(sdp, &sc); 8999e6e0a12SSteven Whitehouse else 9009e6e0a12SSteven Whitehouse error = gfs2_statfs_i(sdp, &sc); 9019e6e0a12SSteven Whitehouse 9029e6e0a12SSteven Whitehouse if (error) 9039e6e0a12SSteven Whitehouse return error; 9049e6e0a12SSteven Whitehouse 9059e6e0a12SSteven Whitehouse buf->f_type = GFS2_MAGIC; 9069e6e0a12SSteven Whitehouse buf->f_bsize = sdp->sd_sb.sb_bsize; 9079e6e0a12SSteven Whitehouse buf->f_blocks = sc.sc_total; 9089e6e0a12SSteven Whitehouse buf->f_bfree = sc.sc_free; 9099e6e0a12SSteven Whitehouse buf->f_bavail = sc.sc_free; 9109e6e0a12SSteven Whitehouse buf->f_files = sc.sc_dinodes + sc.sc_free; 9119e6e0a12SSteven Whitehouse buf->f_ffree = sc.sc_free; 9129e6e0a12SSteven Whitehouse buf->f_namelen = GFS2_FNAMESIZE; 9139e6e0a12SSteven Whitehouse 9149e6e0a12SSteven Whitehouse return 0; 9159e6e0a12SSteven Whitehouse } 9169e6e0a12SSteven Whitehouse 9179e6e0a12SSteven Whitehouse /** 9189e6e0a12SSteven Whitehouse * gfs2_drop_inode - Drop an inode (test for remote unlink) 9199e6e0a12SSteven Whitehouse * @inode: The inode to drop 9209e6e0a12SSteven Whitehouse * 92161b91cfdSAndreas Gruenbacher * If we've received a callback on an iopen lock then it's because a 9229e6e0a12SSteven Whitehouse * remote node tried to deallocate the inode but failed due to this node 9239e6e0a12SSteven Whitehouse * still having the inode open. Here we mark the link count zero 9249e6e0a12SSteven Whitehouse * since we know that it must have reached zero if the GLF_DEMOTE flag 9259e6e0a12SSteven Whitehouse * is set on the iopen glock. If we didn't do a disk read since the 9269e6e0a12SSteven Whitehouse * remote node removed the final link then we might otherwise miss 9279e6e0a12SSteven Whitehouse * this event. This check ensures that this node will deallocate the 9289e6e0a12SSteven Whitehouse * inode's blocks, or alternatively pass the baton on to another 9299e6e0a12SSteven Whitehouse * node for later deallocation. 9309e6e0a12SSteven Whitehouse */ 9319e6e0a12SSteven Whitehouse 93245321ac5SAl Viro static int gfs2_drop_inode(struct inode *inode) 9339e6e0a12SSteven Whitehouse { 9349e6e0a12SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9359e6e0a12SSteven Whitehouse 936*38552ff6SAndreas Gruenbacher if (inode->i_nlink && 9376df9f9a2SAndreas Gruenbacher gfs2_holder_initialized(&ip->i_iopen_gh)) { 9389e6e0a12SSteven Whitehouse struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 9396df9f9a2SAndreas Gruenbacher if (test_bit(GLF_DEMOTE, &gl->gl_flags)) 9409e6e0a12SSteven Whitehouse clear_nlink(inode); 9419e6e0a12SSteven Whitehouse } 9426a1c8f6dSAndreas Gruenbacher 9436a1c8f6dSAndreas Gruenbacher /* 9446a1c8f6dSAndreas Gruenbacher * When under memory pressure when an inode's link count has dropped to 9456a1c8f6dSAndreas Gruenbacher * zero, defer deleting the inode to the delete workqueue. This avoids 9466a1c8f6dSAndreas Gruenbacher * calling into DLM under memory pressure, which can deadlock. 9476a1c8f6dSAndreas Gruenbacher */ 9486a1c8f6dSAndreas Gruenbacher if (!inode->i_nlink && 9496a1c8f6dSAndreas Gruenbacher unlikely(current->flags & PF_MEMALLOC) && 9506a1c8f6dSAndreas Gruenbacher gfs2_holder_initialized(&ip->i_iopen_gh)) { 9516a1c8f6dSAndreas Gruenbacher struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 9526a1c8f6dSAndreas Gruenbacher 9536a1c8f6dSAndreas Gruenbacher gfs2_glock_hold(gl); 954a0e3cc65SAndreas Gruenbacher if (!gfs2_queue_delete_work(gl, 0)) 9556a1c8f6dSAndreas Gruenbacher gfs2_glock_queue_put(gl); 956ba3ca2bcSBob Peterson return 0; 9576a1c8f6dSAndreas Gruenbacher } 9586a1c8f6dSAndreas Gruenbacher 95945321ac5SAl Viro return generic_drop_inode(inode); 9609e6e0a12SSteven Whitehouse } 9619e6e0a12SSteven Whitehouse 9629e6e0a12SSteven Whitehouse static int is_ancestor(const struct dentry *d1, const struct dentry *d2) 9639e6e0a12SSteven Whitehouse { 9649e6e0a12SSteven Whitehouse do { 9659e6e0a12SSteven Whitehouse if (d1 == d2) 9669e6e0a12SSteven Whitehouse return 1; 9679e6e0a12SSteven Whitehouse d1 = d1->d_parent; 9689e6e0a12SSteven Whitehouse } while (!IS_ROOT(d1)); 9699e6e0a12SSteven Whitehouse return 0; 9709e6e0a12SSteven Whitehouse } 9719e6e0a12SSteven Whitehouse 9729e6e0a12SSteven Whitehouse /** 9739e6e0a12SSteven Whitehouse * gfs2_show_options - Show mount options for /proc/mounts 9749e6e0a12SSteven Whitehouse * @s: seq_file structure 97534c80b1dSAl Viro * @root: root of this (sub)tree 9769e6e0a12SSteven Whitehouse * 9779e6e0a12SSteven Whitehouse * Returns: 0 on success or error code 9789e6e0a12SSteven Whitehouse */ 9799e6e0a12SSteven Whitehouse 98034c80b1dSAl Viro static int gfs2_show_options(struct seq_file *s, struct dentry *root) 9819e6e0a12SSteven Whitehouse { 98234c80b1dSAl Viro struct gfs2_sbd *sdp = root->d_sb->s_fs_info; 9839e6e0a12SSteven Whitehouse struct gfs2_args *args = &sdp->sd_args; 9843d3c10f2SBenjamin Marzinski int val; 9859e6e0a12SSteven Whitehouse 98634c80b1dSAl Viro if (is_ancestor(root, sdp->sd_master_dir)) 987eaebdedcSFabian Frederick seq_puts(s, ",meta"); 9889e6e0a12SSteven Whitehouse if (args->ar_lockproto[0]) 989a068acf2SKees Cook seq_show_option(s, "lockproto", args->ar_lockproto); 9909e6e0a12SSteven Whitehouse if (args->ar_locktable[0]) 991a068acf2SKees Cook seq_show_option(s, "locktable", args->ar_locktable); 9929e6e0a12SSteven Whitehouse if (args->ar_hostdata[0]) 993a068acf2SKees Cook seq_show_option(s, "hostdata", args->ar_hostdata); 9949e6e0a12SSteven Whitehouse if (args->ar_spectator) 995eaebdedcSFabian Frederick seq_puts(s, ",spectator"); 9969e6e0a12SSteven Whitehouse if (args->ar_localflocks) 997eaebdedcSFabian Frederick seq_puts(s, ",localflocks"); 9989e6e0a12SSteven Whitehouse if (args->ar_debug) 999eaebdedcSFabian Frederick seq_puts(s, ",debug"); 10009e6e0a12SSteven Whitehouse if (args->ar_posix_acl) 1001eaebdedcSFabian Frederick seq_puts(s, ",acl"); 10029e6e0a12SSteven Whitehouse if (args->ar_quota != GFS2_QUOTA_DEFAULT) { 10039e6e0a12SSteven Whitehouse char *state; 10049e6e0a12SSteven Whitehouse switch (args->ar_quota) { 10059e6e0a12SSteven Whitehouse case GFS2_QUOTA_OFF: 10069e6e0a12SSteven Whitehouse state = "off"; 10079e6e0a12SSteven Whitehouse break; 10089e6e0a12SSteven Whitehouse case GFS2_QUOTA_ACCOUNT: 10099e6e0a12SSteven Whitehouse state = "account"; 10109e6e0a12SSteven Whitehouse break; 10119e6e0a12SSteven Whitehouse case GFS2_QUOTA_ON: 10129e6e0a12SSteven Whitehouse state = "on"; 10139e6e0a12SSteven Whitehouse break; 10149e6e0a12SSteven Whitehouse default: 10159e6e0a12SSteven Whitehouse state = "unknown"; 10169e6e0a12SSteven Whitehouse break; 10179e6e0a12SSteven Whitehouse } 10189e6e0a12SSteven Whitehouse seq_printf(s, ",quota=%s", state); 10199e6e0a12SSteven Whitehouse } 10209e6e0a12SSteven Whitehouse if (args->ar_suiddir) 1021eaebdedcSFabian Frederick seq_puts(s, ",suiddir"); 10229e6e0a12SSteven Whitehouse if (args->ar_data != GFS2_DATA_DEFAULT) { 10239e6e0a12SSteven Whitehouse char *state; 10249e6e0a12SSteven Whitehouse switch (args->ar_data) { 10259e6e0a12SSteven Whitehouse case GFS2_DATA_WRITEBACK: 10269e6e0a12SSteven Whitehouse state = "writeback"; 10279e6e0a12SSteven Whitehouse break; 10289e6e0a12SSteven Whitehouse case GFS2_DATA_ORDERED: 10299e6e0a12SSteven Whitehouse state = "ordered"; 10309e6e0a12SSteven Whitehouse break; 10319e6e0a12SSteven Whitehouse default: 10329e6e0a12SSteven Whitehouse state = "unknown"; 10339e6e0a12SSteven Whitehouse break; 10349e6e0a12SSteven Whitehouse } 10359e6e0a12SSteven Whitehouse seq_printf(s, ",data=%s", state); 10369e6e0a12SSteven Whitehouse } 10379e6e0a12SSteven Whitehouse if (args->ar_discard) 1038eaebdedcSFabian Frederick seq_puts(s, ",discard"); 10395e687eacSBenjamin Marzinski val = sdp->sd_tune.gt_logd_secs; 10405e687eacSBenjamin Marzinski if (val != 30) 10413d3c10f2SBenjamin Marzinski seq_printf(s, ",commit=%d", val); 10423d3c10f2SBenjamin Marzinski val = sdp->sd_tune.gt_statfs_quantum; 10433d3c10f2SBenjamin Marzinski if (val != 30) 10443d3c10f2SBenjamin Marzinski seq_printf(s, ",statfs_quantum=%d", val); 10452b9731e8SSteven Whitehouse else if (sdp->sd_tune.gt_statfs_slow) 10462b9731e8SSteven Whitehouse seq_puts(s, ",statfs_quantum=0"); 10473d3c10f2SBenjamin Marzinski val = sdp->sd_tune.gt_quota_quantum; 10483d3c10f2SBenjamin Marzinski if (val != 60) 10493d3c10f2SBenjamin Marzinski seq_printf(s, ",quota_quantum=%d", val); 10503d3c10f2SBenjamin Marzinski if (args->ar_statfs_percent) 10513d3c10f2SBenjamin Marzinski seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent); 1052d34843d0SBob Peterson if (args->ar_errors != GFS2_ERRORS_DEFAULT) { 1053d34843d0SBob Peterson const char *state; 1054d34843d0SBob Peterson 1055d34843d0SBob Peterson switch (args->ar_errors) { 1056d34843d0SBob Peterson case GFS2_ERRORS_WITHDRAW: 1057d34843d0SBob Peterson state = "withdraw"; 1058d34843d0SBob Peterson break; 1059d34843d0SBob Peterson case GFS2_ERRORS_PANIC: 1060d34843d0SBob Peterson state = "panic"; 1061d34843d0SBob Peterson break; 1062d34843d0SBob Peterson default: 1063d34843d0SBob Peterson state = "unknown"; 1064d34843d0SBob Peterson break; 1065d34843d0SBob Peterson } 1066d34843d0SBob Peterson seq_printf(s, ",errors=%s", state); 1067d34843d0SBob Peterson } 1068cdcfde62SSteven Whitehouse if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) 1069eaebdedcSFabian Frederick seq_puts(s, ",nobarrier"); 1070913a71d2SSteven Whitehouse if (test_bit(SDF_DEMOTE, &sdp->sd_flags)) 1071eaebdedcSFabian Frederick seq_puts(s, ",demote_interface_used"); 107290306c41SBenjamin Marzinski if (args->ar_rgrplvb) 1073eaebdedcSFabian Frederick seq_puts(s, ",rgrplvb"); 1074471f3db2SBenjamin Marzinski if (args->ar_loccookie) 1075471f3db2SBenjamin Marzinski seq_puts(s, ",loccookie"); 10769e6e0a12SSteven Whitehouse return 0; 10779e6e0a12SSteven Whitehouse } 10789e6e0a12SSteven Whitehouse 1079f42ab085SSteven Whitehouse static void gfs2_final_release_pages(struct gfs2_inode *ip) 1080f42ab085SSteven Whitehouse { 1081f42ab085SSteven Whitehouse struct inode *inode = &ip->i_inode; 1082f42ab085SSteven Whitehouse struct gfs2_glock *gl = ip->i_gl; 1083f42ab085SSteven Whitehouse 1084*38552ff6SAndreas Gruenbacher if (unlikely(!gl)) { 1085*38552ff6SAndreas Gruenbacher /* This can only happen during incomplete inode creation. */ 1086*38552ff6SAndreas Gruenbacher BUG_ON(!test_bit(GIF_ALLOC_FAILED, &ip->i_flags)); 1087*38552ff6SAndreas Gruenbacher return; 1088*38552ff6SAndreas Gruenbacher } 1089*38552ff6SAndreas Gruenbacher 1090*38552ff6SAndreas Gruenbacher truncate_inode_pages(gfs2_glock2aspace(gl), 0); 1091f42ab085SSteven Whitehouse truncate_inode_pages(&inode->i_data, 0); 1092f42ab085SSteven Whitehouse 1093638803d4SBob Peterson if (atomic_read(&gl->gl_revokes) == 0) { 1094f42ab085SSteven Whitehouse clear_bit(GLF_LFLUSH, &gl->gl_flags); 1095f42ab085SSteven Whitehouse clear_bit(GLF_DIRTY, &gl->gl_flags); 1096f42ab085SSteven Whitehouse } 1097f42ab085SSteven Whitehouse } 1098f42ab085SSteven Whitehouse 1099f42ab085SSteven Whitehouse static int gfs2_dinode_dealloc(struct gfs2_inode *ip) 1100f42ab085SSteven Whitehouse { 1101f42ab085SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 1102f42ab085SSteven Whitehouse struct gfs2_rgrpd *rgd; 1103564e12b1SBob Peterson struct gfs2_holder gh; 1104f42ab085SSteven Whitehouse int error; 1105f42ab085SSteven Whitehouse 1106f42ab085SSteven Whitehouse if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { 110794fb763bSSteven Whitehouse gfs2_consist_inode(ip); 1108f42ab085SSteven Whitehouse return -EIO; 1109f42ab085SSteven Whitehouse } 1110f42ab085SSteven Whitehouse 11118e2e0047SBob Peterson error = gfs2_rindex_update(sdp); 11128e2e0047SBob Peterson if (error) 11138e2e0047SBob Peterson return error; 1114f42ab085SSteven Whitehouse 1115f4108a60SEric W. Biederman error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); 1116f42ab085SSteven Whitehouse if (error) 11175407e242SBob Peterson return error; 1118f42ab085SSteven Whitehouse 111966fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1120f42ab085SSteven Whitehouse if (!rgd) { 1121f42ab085SSteven Whitehouse gfs2_consist_inode(ip); 1122f42ab085SSteven Whitehouse error = -EIO; 11238339ee54SSteven Whitehouse goto out_qs; 1124f42ab085SSteven Whitehouse } 1125f42ab085SSteven Whitehouse 11264fc7ec31SBob Peterson error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 11274fc7ec31SBob Peterson LM_FLAG_NODE_SCOPE, &gh); 1128f42ab085SSteven Whitehouse if (error) 11298339ee54SSteven Whitehouse goto out_qs; 1130f42ab085SSteven Whitehouse 11314667a0ecSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 11324667a0ecSSteven Whitehouse sdp->sd_jdesc->jd_blocks); 1133f42ab085SSteven Whitehouse if (error) 1134f42ab085SSteven Whitehouse goto out_rg_gunlock; 1135f42ab085SSteven Whitehouse 1136f42ab085SSteven Whitehouse gfs2_free_di(rgd, ip); 1137f42ab085SSteven Whitehouse 1138f42ab085SSteven Whitehouse gfs2_final_release_pages(ip); 1139f42ab085SSteven Whitehouse 1140f42ab085SSteven Whitehouse gfs2_trans_end(sdp); 1141f42ab085SSteven Whitehouse 1142f42ab085SSteven Whitehouse out_rg_gunlock: 1143564e12b1SBob Peterson gfs2_glock_dq_uninit(&gh); 1144f42ab085SSteven Whitehouse out_qs: 1145f42ab085SSteven Whitehouse gfs2_quota_unhold(ip); 1146f42ab085SSteven Whitehouse return error; 1147f42ab085SSteven Whitehouse } 1148f42ab085SSteven Whitehouse 1149380f7c65SSteven Whitehouse /** 115071c1b213SAndreas Gruenbacher * gfs2_glock_put_eventually 115171c1b213SAndreas Gruenbacher * @gl: The glock to put 115271c1b213SAndreas Gruenbacher * 115371c1b213SAndreas Gruenbacher * When under memory pressure, trigger a deferred glock put to make sure we 115471c1b213SAndreas Gruenbacher * won't call into DLM and deadlock. Otherwise, put the glock directly. 115571c1b213SAndreas Gruenbacher */ 115671c1b213SAndreas Gruenbacher 115771c1b213SAndreas Gruenbacher static void gfs2_glock_put_eventually(struct gfs2_glock *gl) 115871c1b213SAndreas Gruenbacher { 115971c1b213SAndreas Gruenbacher if (current->flags & PF_MEMALLOC) 116071c1b213SAndreas Gruenbacher gfs2_glock_queue_put(gl); 116171c1b213SAndreas Gruenbacher else 116271c1b213SAndreas Gruenbacher gfs2_glock_put(gl); 116371c1b213SAndreas Gruenbacher } 116471c1b213SAndreas Gruenbacher 11659e73330fSAndreas Gruenbacher static bool gfs2_upgrade_iopen_glock(struct inode *inode) 11669e73330fSAndreas Gruenbacher { 11679e73330fSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 11689e73330fSAndreas Gruenbacher struct gfs2_sbd *sdp = GFS2_SB(inode); 11699e73330fSAndreas Gruenbacher struct gfs2_holder *gh = &ip->i_iopen_gh; 11709e73330fSAndreas Gruenbacher long timeout = 5 * HZ; 11719e73330fSAndreas Gruenbacher int error; 11729e73330fSAndreas Gruenbacher 11739e73330fSAndreas Gruenbacher gh->gh_flags |= GL_NOCACHE; 11749e73330fSAndreas Gruenbacher gfs2_glock_dq_wait(gh); 11759e73330fSAndreas Gruenbacher 11769e73330fSAndreas Gruenbacher /* 11779e73330fSAndreas Gruenbacher * If there are no other lock holders, we'll get the lock immediately. 11789e73330fSAndreas Gruenbacher * Otherwise, the other nodes holding the lock will be notified about 11799e73330fSAndreas Gruenbacher * our locking request. If they don't have the inode open, they'll 11809e8990deSAndreas Gruenbacher * evict the cached inode and release the lock. Otherwise, if they 11819e8990deSAndreas Gruenbacher * poke the inode glock, we'll take this as an indication that they 11829e8990deSAndreas Gruenbacher * still need the iopen glock and that they'll take care of deleting 11839e8990deSAndreas Gruenbacher * the inode when they're done. As a last resort, if another node 11849e8990deSAndreas Gruenbacher * keeps holding the iopen glock without showing any activity on the 11859e8990deSAndreas Gruenbacher * inode glock, we'll eventually time out. 11869e73330fSAndreas Gruenbacher * 11879e73330fSAndreas Gruenbacher * Note that we're passing the LM_FLAG_TRY_1CB flag to the first 11889e73330fSAndreas Gruenbacher * locking request as an optimization to notify lock holders as soon as 11899e73330fSAndreas Gruenbacher * possible. Without that flag, they'd be notified implicitly by the 11909e73330fSAndreas Gruenbacher * second locking request. 11919e73330fSAndreas Gruenbacher */ 11929e73330fSAndreas Gruenbacher 11939e73330fSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, gh); 11949e73330fSAndreas Gruenbacher error = gfs2_glock_nq(gh); 11959e73330fSAndreas Gruenbacher if (error != GLR_TRYFAILED) 11969e73330fSAndreas Gruenbacher return !error; 11979e73330fSAndreas Gruenbacher 11989e73330fSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, GL_ASYNC | GL_NOCACHE, gh); 11999e73330fSAndreas Gruenbacher error = gfs2_glock_nq(gh); 12009e73330fSAndreas Gruenbacher if (error) 12019e73330fSAndreas Gruenbacher return false; 12029e73330fSAndreas Gruenbacher 12039e73330fSAndreas Gruenbacher timeout = wait_event_interruptible_timeout(sdp->sd_async_glock_wait, 12049e8990deSAndreas Gruenbacher !test_bit(HIF_WAIT, &gh->gh_iflags) || 12059e8990deSAndreas Gruenbacher test_bit(GLF_DEMOTE, &ip->i_gl->gl_flags), 12069e73330fSAndreas Gruenbacher timeout); 12079e73330fSAndreas Gruenbacher if (!test_bit(HIF_HOLDER, &gh->gh_iflags)) { 12089e73330fSAndreas Gruenbacher gfs2_glock_dq(gh); 12099e73330fSAndreas Gruenbacher return false; 12109e73330fSAndreas Gruenbacher } 121153d69132SAndreas Gruenbacher return gfs2_glock_holder_ready(gh) == 0; 12129e73330fSAndreas Gruenbacher } 12139e73330fSAndreas Gruenbacher 121471c1b213SAndreas Gruenbacher /** 121553dbc27eSBob Peterson * evict_should_delete - determine whether the inode is eligible for deletion 121653dbc27eSBob Peterson * @inode: The inode to evict 1217c551f66cSLee Jones * @gh: The glock holder structure 121853dbc27eSBob Peterson * 121953dbc27eSBob Peterson * This function determines whether the evicted inode is eligible to be deleted 122053dbc27eSBob Peterson * and locks the inode glock. 122153dbc27eSBob Peterson * 122253dbc27eSBob Peterson * Returns: the fate of the dinode 122353dbc27eSBob Peterson */ 122453dbc27eSBob Peterson static enum dinode_demise evict_should_delete(struct inode *inode, 122553dbc27eSBob Peterson struct gfs2_holder *gh) 122653dbc27eSBob Peterson { 122753dbc27eSBob Peterson struct gfs2_inode *ip = GFS2_I(inode); 122853dbc27eSBob Peterson struct super_block *sb = inode->i_sb; 122953dbc27eSBob Peterson struct gfs2_sbd *sdp = sb->s_fs_info; 123053dbc27eSBob Peterson int ret; 123153dbc27eSBob Peterson 1232*38552ff6SAndreas Gruenbacher if (unlikely(test_bit(GIF_ALLOC_FAILED, &ip->i_flags))) 123353dbc27eSBob Peterson goto should_delete; 123453dbc27eSBob Peterson 123553dbc27eSBob Peterson if (test_bit(GIF_DEFERRED_DELETE, &ip->i_flags)) 123653dbc27eSBob Peterson return SHOULD_DEFER_EVICTION; 123753dbc27eSBob Peterson 123853dbc27eSBob Peterson /* Deletes should never happen under memory pressure anymore. */ 123953dbc27eSBob Peterson if (WARN_ON_ONCE(current->flags & PF_MEMALLOC)) 124053dbc27eSBob Peterson return SHOULD_DEFER_EVICTION; 124153dbc27eSBob Peterson 124253dbc27eSBob Peterson /* Must not read inode block until block type has been verified */ 124353dbc27eSBob Peterson ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, gh); 124453dbc27eSBob Peterson if (unlikely(ret)) { 124553dbc27eSBob Peterson glock_clear_object(ip->i_iopen_gh.gh_gl, ip); 124653dbc27eSBob Peterson ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 124753dbc27eSBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 124853dbc27eSBob Peterson return SHOULD_DEFER_EVICTION; 124953dbc27eSBob Peterson } 125053dbc27eSBob Peterson 125153dbc27eSBob Peterson if (gfs2_inode_already_deleted(ip->i_gl, ip->i_no_formal_ino)) 125253dbc27eSBob Peterson return SHOULD_NOT_DELETE_DINODE; 125353dbc27eSBob Peterson ret = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED); 125453dbc27eSBob Peterson if (ret) 125553dbc27eSBob Peterson return SHOULD_NOT_DELETE_DINODE; 125653dbc27eSBob Peterson 1257f2e70d8fSBob Peterson ret = gfs2_instantiate(gh); 125853dbc27eSBob Peterson if (ret) 125953dbc27eSBob Peterson return SHOULD_NOT_DELETE_DINODE; 126053dbc27eSBob Peterson 126153dbc27eSBob Peterson /* 126253dbc27eSBob Peterson * The inode may have been recreated in the meantime. 126353dbc27eSBob Peterson */ 126453dbc27eSBob Peterson if (inode->i_nlink) 126553dbc27eSBob Peterson return SHOULD_NOT_DELETE_DINODE; 126653dbc27eSBob Peterson 126753dbc27eSBob Peterson should_delete: 126853dbc27eSBob Peterson if (gfs2_holder_initialized(&ip->i_iopen_gh) && 126953dbc27eSBob Peterson test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { 127053dbc27eSBob Peterson if (!gfs2_upgrade_iopen_glock(inode)) { 127153dbc27eSBob Peterson gfs2_holder_uninit(&ip->i_iopen_gh); 127253dbc27eSBob Peterson return SHOULD_NOT_DELETE_DINODE; 127353dbc27eSBob Peterson } 127453dbc27eSBob Peterson } 127553dbc27eSBob Peterson return SHOULD_DELETE_DINODE; 127653dbc27eSBob Peterson } 127753dbc27eSBob Peterson 127853dbc27eSBob Peterson /** 12796e7e9a50SBob Peterson * evict_unlinked_inode - delete the pieces of an unlinked evicted inode 12806e7e9a50SBob Peterson * @inode: The inode to evict 12816e7e9a50SBob Peterson */ 12826e7e9a50SBob Peterson static int evict_unlinked_inode(struct inode *inode) 12836e7e9a50SBob Peterson { 12846e7e9a50SBob Peterson struct gfs2_inode *ip = GFS2_I(inode); 12856e7e9a50SBob Peterson int ret; 12866e7e9a50SBob Peterson 12876e7e9a50SBob Peterson if (S_ISDIR(inode->i_mode) && 12886e7e9a50SBob Peterson (ip->i_diskflags & GFS2_DIF_EXHASH)) { 12896e7e9a50SBob Peterson ret = gfs2_dir_exhash_dealloc(ip); 12906e7e9a50SBob Peterson if (ret) 12916e7e9a50SBob Peterson goto out; 12926e7e9a50SBob Peterson } 12936e7e9a50SBob Peterson 12946e7e9a50SBob Peterson if (ip->i_eattr) { 12956e7e9a50SBob Peterson ret = gfs2_ea_dealloc(ip); 12966e7e9a50SBob Peterson if (ret) 12976e7e9a50SBob Peterson goto out; 12986e7e9a50SBob Peterson } 12996e7e9a50SBob Peterson 13006e7e9a50SBob Peterson if (!gfs2_is_stuffed(ip)) { 13016e7e9a50SBob Peterson ret = gfs2_file_dealloc(ip); 13026e7e9a50SBob Peterson if (ret) 13036e7e9a50SBob Peterson goto out; 13046e7e9a50SBob Peterson } 13056e7e9a50SBob Peterson 13066e7e9a50SBob Peterson /* We're about to clear the bitmap for the dinode, but as soon as we 13076e7e9a50SBob Peterson do, gfs2_create_inode can create another inode at the same block 13086e7e9a50SBob Peterson location and try to set gl_object again. We clear gl_object here so 13096e7e9a50SBob Peterson that subsequent inode creates don't see an old gl_object. */ 1310*38552ff6SAndreas Gruenbacher if (ip->i_gl) { 13116e7e9a50SBob Peterson glock_clear_object(ip->i_gl, ip); 13126e7e9a50SBob Peterson gfs2_inode_remember_delete(ip->i_gl, ip->i_no_formal_ino); 1313*38552ff6SAndreas Gruenbacher } 1314*38552ff6SAndreas Gruenbacher ret = gfs2_dinode_dealloc(ip); 13156e7e9a50SBob Peterson out: 13166e7e9a50SBob Peterson return ret; 13176e7e9a50SBob Peterson } 13186e7e9a50SBob Peterson 1319d90be6abSBob Peterson /* 1320d90be6abSBob Peterson * evict_linked_inode - evict an inode whose dinode has not been unlinked 1321d90be6abSBob Peterson * @inode: The inode to evict 1322d90be6abSBob Peterson */ 1323d90be6abSBob Peterson static int evict_linked_inode(struct inode *inode) 1324d90be6abSBob Peterson { 1325d90be6abSBob Peterson struct super_block *sb = inode->i_sb; 1326d90be6abSBob Peterson struct gfs2_sbd *sdp = sb->s_fs_info; 1327d90be6abSBob Peterson struct gfs2_inode *ip = GFS2_I(inode); 1328d90be6abSBob Peterson struct address_space *metamapping; 1329d90be6abSBob Peterson int ret; 1330d90be6abSBob Peterson 1331d90be6abSBob Peterson gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL | 1332d90be6abSBob Peterson GFS2_LFC_EVICT_INODE); 1333d90be6abSBob Peterson metamapping = gfs2_glock2aspace(ip->i_gl); 1334d90be6abSBob Peterson if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) { 1335d90be6abSBob Peterson filemap_fdatawrite(metamapping); 1336d90be6abSBob Peterson filemap_fdatawait(metamapping); 1337d90be6abSBob Peterson } 1338d90be6abSBob Peterson write_inode_now(inode, 1); 1339d90be6abSBob Peterson gfs2_ail_flush(ip->i_gl, 0); 1340d90be6abSBob Peterson 1341d90be6abSBob Peterson ret = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); 1342d90be6abSBob Peterson if (ret) 1343d90be6abSBob Peterson return ret; 1344d90be6abSBob Peterson 1345d90be6abSBob Peterson /* Needs to be done before glock release & also in a transaction */ 1346d90be6abSBob Peterson truncate_inode_pages(&inode->i_data, 0); 1347d90be6abSBob Peterson truncate_inode_pages(metamapping, 0); 1348d90be6abSBob Peterson gfs2_trans_end(sdp); 1349d90be6abSBob Peterson return 0; 1350d90be6abSBob Peterson } 1351d90be6abSBob Peterson 13526e7e9a50SBob Peterson /** 1353380f7c65SSteven Whitehouse * gfs2_evict_inode - Remove an inode from cache 1354380f7c65SSteven Whitehouse * @inode: The inode to evict 1355380f7c65SSteven Whitehouse * 1356380f7c65SSteven Whitehouse * There are three cases to consider: 1357380f7c65SSteven Whitehouse * 1. i_nlink == 0, we are final opener (and must deallocate) 1358380f7c65SSteven Whitehouse * 2. i_nlink == 0, we are not the final opener (and cannot deallocate) 1359380f7c65SSteven Whitehouse * 3. i_nlink > 0 1360380f7c65SSteven Whitehouse * 1361380f7c65SSteven Whitehouse * If the fs is read only, then we have to treat all cases as per #3 1362380f7c65SSteven Whitehouse * since we are unable to do any deallocation. The inode will be 1363380f7c65SSteven Whitehouse * deallocated by the next read/write node to attempt an allocation 1364380f7c65SSteven Whitehouse * in the same resource group 1365380f7c65SSteven Whitehouse * 13669e6e0a12SSteven Whitehouse * We have to (at the moment) hold the inodes main lock to cover 13679e6e0a12SSteven Whitehouse * the gap between unlocking the shared lock on the iopen lock and 13689e6e0a12SSteven Whitehouse * taking the exclusive lock. I'd rather do a shared -> exclusive 13699e6e0a12SSteven Whitehouse * conversion on the iopen lock, but we can change that later. This 13709e6e0a12SSteven Whitehouse * is safe, just less efficient. 13719e6e0a12SSteven Whitehouse */ 13729e6e0a12SSteven Whitehouse 1373d5c1515cSAl Viro static void gfs2_evict_inode(struct inode *inode) 13749e6e0a12SSteven Whitehouse { 1375001e8e8dSSteven Whitehouse struct super_block *sb = inode->i_sb; 1376001e8e8dSSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info; 13779e6e0a12SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 13789e6e0a12SSteven Whitehouse struct gfs2_holder gh; 137923d828fcSBob Peterson int ret; 13809e6e0a12SSteven Whitehouse 1381*38552ff6SAndreas Gruenbacher if (inode->i_nlink || sb_rdonly(sb) || !ip->i_no_addr) 1382d5c1515cSAl Viro goto out; 1383d5c1515cSAl Viro 1384e0b62e21SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 138553dbc27eSBob Peterson ret = evict_should_delete(inode, &gh); 138653dbc27eSBob Peterson if (ret == SHOULD_DEFER_EVICTION) 13878c7b9262SAndreas Gruenbacher goto out; 13880a0d9f55SBob Peterson if (ret == SHOULD_DELETE_DINODE) 13896e7e9a50SBob Peterson ret = evict_unlinked_inode(inode); 13900a0d9f55SBob Peterson else 1391d90be6abSBob Peterson ret = evict_linked_inode(inode); 13929e6e0a12SSteven Whitehouse 1393a097dc7eSBob Peterson if (gfs2_rs_active(&ip->i_res)) 1394a097dc7eSBob Peterson gfs2_rs_deltree(&ip->i_res); 13958e2e0047SBob Peterson 1396240c6235SBob Peterson if (gfs2_holder_initialized(&gh)) { 1397240c6235SBob Peterson glock_clear_object(ip->i_gl, ip); 13989e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&gh); 1399240c6235SBob Peterson } 140023d828fcSBob Peterson if (ret && ret != GLR_TRYFAILED && ret != -EROFS) 140123d828fcSBob Peterson fs_warn(sdp, "gfs2_evict_inode: %d\n", ret); 14029e6e0a12SSteven Whitehouse out: 140391b0abe3SJohannes Weiner truncate_inode_pages_final(&inode->i_data); 14042fba46a0SBob Peterson if (ip->i_qadata) 14052fba46a0SBob Peterson gfs2_assert_warn(sdp, ip->i_qadata->qa_ref == 0); 14067336905aSAndreas Gruenbacher gfs2_rs_deltree(&ip->i_res); 140745138990SSteven Whitehouse gfs2_ordered_del_inode(ip); 1408dbd5768fSJan Kara clear_inode(inode); 140917d539f0SSteven Whitehouse gfs2_dir_hash_inval(ip); 14106df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&ip->i_iopen_gh)) { 141171c1b213SAndreas Gruenbacher struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl; 141271c1b213SAndreas Gruenbacher 141371c1b213SAndreas Gruenbacher glock_clear_object(gl, ip); 141440e7e86eSAndreas Gruenbacher if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) { 1415a6a4d98bSBob Peterson ip->i_iopen_gh.gh_flags |= GL_NOCACHE; 141640e7e86eSAndreas Gruenbacher gfs2_glock_dq(&ip->i_iopen_gh); 141740e7e86eSAndreas Gruenbacher } 141871c1b213SAndreas Gruenbacher gfs2_glock_hold(gl); 141940e7e86eSAndreas Gruenbacher gfs2_holder_uninit(&ip->i_iopen_gh); 142071c1b213SAndreas Gruenbacher gfs2_glock_put_eventually(gl); 1421d5c1515cSAl Viro } 142249462e2bSBob Peterson if (ip->i_gl) { 142349462e2bSBob Peterson glock_clear_object(ip->i_gl, ip); 142449462e2bSBob Peterson wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE); 142549462e2bSBob Peterson gfs2_glock_add_to_lru(ip->i_gl); 142649462e2bSBob Peterson gfs2_glock_put_eventually(ip->i_gl); 142749462e2bSBob Peterson ip->i_gl = NULL; 142849462e2bSBob Peterson } 14299e6e0a12SSteven Whitehouse } 14309e6e0a12SSteven Whitehouse 14319e6e0a12SSteven Whitehouse static struct inode *gfs2_alloc_inode(struct super_block *sb) 14329e6e0a12SSteven Whitehouse { 14339e6e0a12SSteven Whitehouse struct gfs2_inode *ip; 14349e6e0a12SSteven Whitehouse 1435fd60b288SMuchun Song ip = alloc_inode_sb(sb, gfs2_inode_cachep, GFP_KERNEL); 1436d4031259SAndreas Gruenbacher if (!ip) 1437d4031259SAndreas Gruenbacher return NULL; 1438*38552ff6SAndreas Gruenbacher ip->i_no_addr = 0; 14399e6e0a12SSteven Whitehouse ip->i_flags = 0; 14409e6e0a12SSteven Whitehouse ip->i_gl = NULL; 144140e7e86eSAndreas Gruenbacher gfs2_holder_mark_uninitialized(&ip->i_iopen_gh); 1442a097dc7eSBob Peterson memset(&ip->i_res, 0, sizeof(ip->i_res)); 1443a097dc7eSBob Peterson RB_CLEAR_NODE(&ip->i_res.rs_node); 1444c8d57703SAndreas Gruenbacher ip->i_rahead = 0; 14459e6e0a12SSteven Whitehouse return &ip->i_inode; 14469e6e0a12SSteven Whitehouse } 14479e6e0a12SSteven Whitehouse 1448784494e1SAl Viro static void gfs2_free_inode(struct inode *inode) 1449fa0d7e3dSNick Piggin { 1450784494e1SAl Viro kmem_cache_free(gfs2_inode_cachep, GFS2_I(inode)); 14519e6e0a12SSteven Whitehouse } 14529e6e0a12SSteven Whitehouse 145397fd734bSAbhi Das extern void free_local_statfs_inodes(struct gfs2_sbd *sdp) 145497fd734bSAbhi Das { 145597fd734bSAbhi Das struct local_statfs_inode *lsi, *safe; 145697fd734bSAbhi Das 145797fd734bSAbhi Das /* Run through the statfs inodes list to iput and free memory */ 145897fd734bSAbhi Das list_for_each_entry_safe(lsi, safe, &sdp->sd_sc_inodes_list, si_list) { 145997fd734bSAbhi Das if (lsi->si_jid == sdp->sd_jdesc->jd_jid) 146097fd734bSAbhi Das sdp->sd_sc_inode = NULL; /* belongs to this node */ 146197fd734bSAbhi Das if (lsi->si_sc_inode) 146297fd734bSAbhi Das iput(lsi->si_sc_inode); 146397fd734bSAbhi Das list_del(&lsi->si_list); 146497fd734bSAbhi Das kfree(lsi); 146597fd734bSAbhi Das } 146697fd734bSAbhi Das } 146797fd734bSAbhi Das 146897fd734bSAbhi Das extern struct inode *find_local_statfs_inode(struct gfs2_sbd *sdp, 146997fd734bSAbhi Das unsigned int index) 147097fd734bSAbhi Das { 147197fd734bSAbhi Das struct local_statfs_inode *lsi; 147297fd734bSAbhi Das 147397fd734bSAbhi Das /* Return the local (per node) statfs inode in the 147497fd734bSAbhi Das * sdp->sd_sc_inodes_list corresponding to the 'index'. */ 147597fd734bSAbhi Das list_for_each_entry(lsi, &sdp->sd_sc_inodes_list, si_list) { 147697fd734bSAbhi Das if (lsi->si_jid == index) 147797fd734bSAbhi Das return lsi->si_sc_inode; 147897fd734bSAbhi Das } 147997fd734bSAbhi Das return NULL; 148097fd734bSAbhi Das } 148197fd734bSAbhi Das 14829e6e0a12SSteven Whitehouse const struct super_operations gfs2_super_ops = { 14839e6e0a12SSteven Whitehouse .alloc_inode = gfs2_alloc_inode, 1484784494e1SAl Viro .free_inode = gfs2_free_inode, 14859e6e0a12SSteven Whitehouse .write_inode = gfs2_write_inode, 1486ab9bbda0SSteven Whitehouse .dirty_inode = gfs2_dirty_inode, 1487d5c1515cSAl Viro .evict_inode = gfs2_evict_inode, 14889e6e0a12SSteven Whitehouse .put_super = gfs2_put_super, 14899e6e0a12SSteven Whitehouse .sync_fs = gfs2_sync_fs, 14902e60d768SBenjamin Marzinski .freeze_super = gfs2_freeze, 14912e60d768SBenjamin Marzinski .thaw_super = gfs2_unfreeze, 14929e6e0a12SSteven Whitehouse .statfs = gfs2_statfs, 14939e6e0a12SSteven Whitehouse .drop_inode = gfs2_drop_inode, 14949e6e0a12SSteven Whitehouse .show_options = gfs2_show_options, 14959e6e0a12SSteven Whitehouse }; 14969e6e0a12SSteven Whitehouse 1497