| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| David Teigland | 2695 | 31.07% | 6 | 2.67% |
| Steven Whitehouse | 2562 | 29.54% | 83 | 36.89% |
| Andrew Price | 1385 | 15.97% | 8 | 3.56% |
| Abhijith Das | 595 | 6.86% | 4 | 1.78% |
| Andreas Gruenbacher | 433 | 4.99% | 24 | 10.67% |
| Robert S Peterson | 349 | 4.02% | 35 | 15.56% |
| Benjamin Marzinski | 199 | 2.29% | 9 | 4.00% |
| Al Viro | 136 | 1.57% | 13 | 5.78% |
| Josef Whiter | 55 | 0.63% | 1 | 0.44% |
| Anant Thazhemadam | 45 | 0.52% | 1 | 0.44% |
| Christoph Hellwig | 41 | 0.47% | 4 | 1.78% |
| Jan Kara | 33 | 0.38% | 3 | 1.33% |
| Fabian Frederick | 18 | 0.21% | 2 | 0.89% |
| David Howells | 15 | 0.17% | 2 | 0.89% |
| Joe Perches | 13 | 0.15% | 1 | 0.44% |
| Jamie Iles | 12 | 0.14% | 1 | 0.44% |
| Eric W. Biedermann | 10 | 0.12% | 1 | 0.44% |
| Srinivasa D S | 8 | 0.09% | 1 | 0.44% |
| David Chinner | 8 | 0.09% | 1 | 0.44% |
| Cheng Renquan | 7 | 0.08% | 1 | 0.44% |
| Tejun Heo | 6 | 0.07% | 1 | 0.44% |
| Neil Brown | 6 | 0.07% | 2 | 0.89% |
| Colin Ian King | 5 | 0.06% | 1 | 0.44% |
| Linus Torvalds | 5 | 0.06% | 1 | 0.44% |
| Lee Jones | 4 | 0.05% | 1 | 0.44% |
| S. Wendy Cheng | 3 | 0.03% | 1 | 0.44% |
| Kent Overstreet | 3 | 0.03% | 2 | 0.89% |
| Linus Torvalds (pre-git) | 3 | 0.03% | 2 | 0.89% |
| Paul Gortmaker | 3 | 0.03% | 1 | 0.44% |
| Thomas Gleixner | 2 | 0.02% | 1 | 0.44% |
| Michael Christie | 2 | 0.02% | 1 | 0.44% |
| Jan Blunck | 2 | 0.02% | 1 | 0.44% |
| Jean Delvare | 2 | 0.02% | 1 | 0.44% |
| Martin K. Petersen | 2 | 0.02% | 1 | 0.44% |
| Johannes Thumshirn | 1 | 0.01% | 1 | 0.44% |
| Josef Bacik | 1 | 0.01% | 1 | 0.44% |
| Matthew Wilcox | 1 | 0.01% | 1 | 0.44% |
| Kefeng Wang | 1 | 0.01% | 1 | 0.44% |
| Adrian Bunk | 1 | 0.01% | 1 | 0.44% |
| Fabio Massimo Di Nitto | 1 | 0.01% | 1 | 0.44% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 0.44% |
| Total | 8674 | 225 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/sched.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/completion.h> #include <linux/buffer_head.h> #include <linux/blkdev.h> #include <linux/kthread.h> #include <linux/export.h> #include <linux/namei.h> #include <linux/mount.h> #include <linux/gfs2_ondisk.h> #include <linux/quotaops.h> #include <linux/lockdep.h> #include <linux/module.h> #include <linux/backing-dev.h> #include <linux/fs_parser.h> #include "gfs2.h" #include "incore.h" #include "bmap.h" #include "glock.h" #include "glops.h" #include "inode.h" #include "recovery.h" #include "rgrp.h" #include "super.h" #include "sys.h" #include "util.h" #include "log.h" #include "quota.h" #include "dir.h" #include "meta_io.h" #include "trace_gfs2.h" #include "lops.h" #define DO 0 #define UNDO 1 /** * gfs2_tune_init - Fill a gfs2_tune structure with default values * @gt: tune * */ static void gfs2_tune_init(struct gfs2_tune *gt) { spin_lock_init(>->gt_spin); gt->gt_quota_warn_period = 10; gt->gt_quota_scale_num = 1; gt->gt_quota_scale_den = 1; gt->gt_new_files_jdata = 0; gt->gt_max_readahead = BIT(18); gt->gt_complain_secs = 10; } void free_sbd(struct gfs2_sbd *sdp) { if (sdp->sd_lkstats) free_percpu(sdp->sd_lkstats); kfree(sdp); } static struct gfs2_sbd *init_sbd(struct super_block *sb) { struct gfs2_sbd *sdp; struct address_space *mapping; sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL); if (!sdp) return NULL; sdp->sd_vfs = sb; sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats); if (!sdp->sd_lkstats) goto fail; sb->s_fs_info = sdp; set_bit(SDF_NOJOURNALID, &sdp->sd_flags); gfs2_tune_init(&sdp->sd_tune); init_waitqueue_head(&sdp->sd_kill_wait); init_waitqueue_head(&sdp->sd_async_glock_wait); atomic_set(&sdp->sd_glock_disposal, 0); init_completion(&sdp->sd_locking_init); init_completion(&sdp->sd_wdack); spin_lock_init(&sdp->sd_statfs_spin); spin_lock_init(&sdp->sd_rindex_spin); sdp->sd_rindex_tree.rb_node = NULL; INIT_LIST_HEAD(&sdp->sd_jindex_list); spin_lock_init(&sdp->sd_jindex_spin); mutex_init(&sdp->sd_jindex_mutex); init_completion(&sdp->sd_journal_ready); INIT_LIST_HEAD(&sdp->sd_quota_list); mutex_init(&sdp->sd_quota_mutex); mutex_init(&sdp->sd_quota_sync_mutex); init_waitqueue_head(&sdp->sd_quota_wait); spin_lock_init(&sdp->sd_bitmap_lock); INIT_LIST_HEAD(&sdp->sd_sc_inodes_list); mapping = &sdp->sd_aspace; address_space_init_once(mapping); mapping->a_ops = &gfs2_rgrp_aops; mapping->host = sb->s_bdev->bd_inode; mapping->flags = 0; mapping_set_gfp_mask(mapping, GFP_NOFS); mapping->i_private_data = NULL; mapping->writeback_index = 0; spin_lock_init(&sdp->sd_log_lock); atomic_set(&sdp->sd_log_pinned, 0); INIT_LIST_HEAD(&sdp->sd_log_revokes); INIT_LIST_HEAD(&sdp->sd_log_ordered); spin_lock_init(&sdp->sd_ordered_lock); init_waitqueue_head(&sdp->sd_log_waitq); init_waitqueue_head(&sdp->sd_logd_waitq); spin_lock_init(&sdp->sd_ail_lock); INIT_LIST_HEAD(&sdp->sd_ail1_list); INIT_LIST_HEAD(&sdp->sd_ail2_list); init_rwsem(&sdp->sd_log_flush_lock); atomic_set(&sdp->sd_log_in_flight, 0); init_waitqueue_head(&sdp->sd_log_flush_wait); mutex_init(&sdp->sd_freeze_mutex); return sdp; fail: free_sbd(sdp); return NULL; } /** * gfs2_check_sb - Check superblock * @sdp: the filesystem * @silent: Don't print a message if the check fails * * Checks the version code of the FS is one that we understand how to * read and that the sizes of the various on-disk structures have not * changed. */ static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent) { struct gfs2_sb_host *sb = &sdp->sd_sb; if (sb->sb_magic != GFS2_MAGIC || sb->sb_type != GFS2_METATYPE_SB) { if (!silent) pr_warn("not a GFS2 filesystem\n"); return -EINVAL; } if (sb->sb_fs_format < GFS2_FS_FORMAT_MIN || sb->sb_fs_format > GFS2_FS_FORMAT_MAX || sb->sb_multihost_format != GFS2_FORMAT_MULTI) { fs_warn(sdp, "Unknown on-disk format, unable to mount\n"); return -EINVAL; } if (sb->sb_bsize < 512 || sb->sb_bsize > PAGE_SIZE || (sb->sb_bsize & (sb->sb_bsize - 1))) { pr_warn("Invalid block size\n"); return -EINVAL; } if (sb->sb_bsize_shift != ffs(sb->sb_bsize) - 1) { pr_warn("Invalid block size shift\n"); return -EINVAL; } return 0; } static void end_bio_io_page(struct bio *bio) { struct page *page = bio->bi_private; if (!bio->bi_status) SetPageUptodate(page); else pr_warn("error %d reading superblock\n", bio->bi_status); unlock_page(page); } static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf) { struct gfs2_sb_host *sb = &sdp->sd_sb; struct super_block *s = sdp->sd_vfs; const struct gfs2_sb *str = buf; sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic); sb->sb_type = be32_to_cpu(str->sb_header.mh_type); sb->sb_fs_format = be32_to_cpu(str->sb_fs_format); sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format); sb->sb_bsize = be32_to_cpu(str->sb_bsize); sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift); sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr); sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino); sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr); sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino); memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN); memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN); super_set_uuid(s, str->sb_uuid, 16); } /** * gfs2_read_super - Read the gfs2 super block from disk * @sdp: The GFS2 super block * @sector: The location of the super block * @silent: Don't print a message if the check fails * * This uses the bio functions to read the super block from disk * because we want to be 100% sure that we never read cached data. * A super block is read twice only during each GFS2 mount and is * never written to by the filesystem. The first time its read no * locks are held, and the only details which are looked at are those * relating to the locking protocol. Once locking is up and working, * the sb is read again under the lock to establish the location of * the master directory (contains pointers to journals etc) and the * root directory. * * Returns: 0 on success or error */ static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent) { struct super_block *sb = sdp->sd_vfs; struct gfs2_sb *p; struct page *page; struct bio *bio; page = alloc_page(GFP_NOFS); if (unlikely(!page)) return -ENOMEM; ClearPageUptodate(page); ClearPageDirty(page); lock_page(page); bio = bio_alloc(sb->s_bdev, 1, REQ_OP_READ | REQ_META, GFP_NOFS); bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9); __bio_add_page(bio, page, PAGE_SIZE, 0); bio->bi_end_io = end_bio_io_page; bio->bi_private = page; submit_bio(bio); wait_on_page_locked(page); bio_put(bio); if (!PageUptodate(page)) { __free_page(page); return -EIO; } p = kmap(page); gfs2_sb_in(sdp, p); kunmap(page); __free_page(page); return gfs2_check_sb(sdp, silent); } /** * gfs2_read_sb - Read super block * @sdp: The GFS2 superblock * @silent: Don't print message if mount fails * */ static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent) { u32 hash_blocks, ind_blocks, leaf_blocks; u32 tmp_blocks; unsigned int x; int error; error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); if (error) { if (!silent) fs_err(sdp, "can't read superblock\n"); return error; } sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - 9; sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift); sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)) / sizeof(u64); sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(u64); sdp->sd_ldptrs = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / sizeof(u64); sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64); sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(struct gfs2_quota_change); sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */ /* * We always keep at least one block reserved for revokes in * transactions. This greatly simplifies allocating additional * revoke blocks. */ atomic_set(&sdp->sd_log_revokes_available, sdp->sd_ldptrs); /* Compute maximum reservation required to add a entry to a directory */ hash_blocks = DIV_ROUND_UP(sizeof(u64) * BIT(GFS2_DIR_MAX_DEPTH), sdp->sd_jbsize); ind_blocks = 0; for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); ind_blocks += tmp_blocks; } leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; for (x = 2;; x++) { u64 space, d; u32 m; space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; d = space; m = do_div(d, sdp->sd_inptrs); if (d != sdp->sd_heightsize[x - 1] || m) break; sdp->sd_heightsize[x] = space; } sdp->sd_max_height = x; sdp->sd_heightsize[x] = ~0; gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_leaf)) / GFS2_MIN_DIRENT_SIZE; return 0; } static int init_names(struct gfs2_sbd *sdp, int silent) { char *proto, *table; int error = 0; proto = sdp->sd_args.ar_lockproto; table = sdp->sd_args.ar_locktable; /* Try to autodetect */ if (!proto[0] || !table[0]) { error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); if (error) return error; if (!proto[0]) proto = sdp->sd_sb.sb_lockproto; if (!table[0]) table = sdp->sd_sb.sb_locktable; } if (!table[0]) table = sdp->sd_vfs->s_id; BUILD_BUG_ON(GFS2_LOCKNAME_LEN > GFS2_FSNAME_LEN); strscpy(sdp->sd_proto_name, proto, GFS2_LOCKNAME_LEN); strscpy(sdp->sd_table_name, table, GFS2_LOCKNAME_LEN); table = sdp->sd_table_name; while ((table = strchr(table, '/'))) *table = '_'; return error; } static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh, int undo) { int error = 0; if (undo) goto fail_trans; error = gfs2_glock_nq_num(sdp, GFS2_MOUNT_LOCK, &gfs2_nondisk_glops, LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE | GL_NOPID, mount_gh); if (error) { fs_err(sdp, "can't acquire mount glock: %d\n", error); goto fail; } error = gfs2_glock_nq_num(sdp, GFS2_LIVE_LOCK, &gfs2_nondisk_glops, LM_ST_SHARED, LM_FLAG_NOEXP | GL_EXACT | GL_NOPID, &sdp->sd_live_gh); if (error) { fs_err(sdp, "can't acquire live glock: %d\n", error); goto fail_mount; } error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops, CREATE, &sdp->sd_rename_gl); if (error) { fs_err(sdp, "can't create rename glock: %d\n", error); goto fail_live; } error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops, CREATE, &sdp->sd_freeze_gl); if (error) { fs_err(sdp, "can't create freeze glock: %d\n", error); goto fail_rename; } return 0; fail_trans: gfs2_glock_put(sdp->sd_freeze_gl); fail_rename: gfs2_glock_put(sdp->sd_rename_gl); fail_live: gfs2_glock_dq_uninit(&sdp->sd_live_gh); fail_mount: gfs2_glock_dq_uninit(mount_gh); fail: return error; } static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, u64 no_addr, const char *name) { struct gfs2_sbd *sdp = sb->s_fs_info; struct dentry *dentry; struct inode *inode; inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, GFS2_BLKST_FREE /* ignore */); if (IS_ERR(inode)) { fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode)); return PTR_ERR(inode); } dentry = d_make_root(inode); if (!dentry) { fs_err(sdp, "can't alloc %s dentry\n", name); return -ENOMEM; } *dptr = dentry; return 0; } static int init_sb(struct gfs2_sbd *sdp, int silent) { struct super_block *sb = sdp->sd_vfs; struct gfs2_holder sb_gh; u64 no_addr; int ret; ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops, LM_ST_SHARED, 0, &sb_gh); if (ret) { fs_err(sdp, "can't acquire superblock glock: %d\n", ret); return ret; } ret = gfs2_read_sb(sdp, silent); if (ret) { fs_err(sdp, "can't read superblock: %d\n", ret); goto out; } switch(sdp->sd_sb.sb_fs_format) { case GFS2_FS_FORMAT_MAX: sb->s_xattr = gfs2_xattr_handlers_max; break; case GFS2_FS_FORMAT_MIN: sb->s_xattr = gfs2_xattr_handlers_min; break; default: BUG(); } /* Set up the buffer cache and SB for real */ if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) { ret = -EINVAL; fs_err(sdp, "FS block size (%u) is too small for device " "block size (%u)\n", sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev)); goto out; } if (sdp->sd_sb.sb_bsize > PAGE_SIZE) { ret = -EINVAL; fs_err(sdp, "FS block size (%u) is too big for machine " "page size (%u)\n", sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE); goto out; } sb_set_blocksize(sb, sdp->sd_sb.sb_bsize); /* Get the root inode */ no_addr = sdp->sd_sb.sb_root_dir.no_addr; ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root"); if (ret) goto out; /* Get the master inode */ no_addr = sdp->sd_sb.sb_master_dir.no_addr; ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master"); if (ret) { dput(sdp->sd_root_dir); goto out; } sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir); out: gfs2_glock_dq_uninit(&sb_gh); return ret; } static void gfs2_others_may_mount(struct gfs2_sbd *sdp) { char *message = "FIRSTMOUNT=Done"; char *envp[] = { message, NULL }; fs_info(sdp, "first mount done, others may mount\n"); if (sdp->sd_lockstruct.ls_ops->lm_first_done) sdp->sd_lockstruct.ls_ops->lm_first_done(sdp); kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp); } /** * gfs2_jindex_hold - Grab a lock on the jindex * @sdp: The GFS2 superblock * @ji_gh: the holder for the jindex glock * * Returns: errno */ static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) { struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex); struct qstr name; char buf[20]; struct gfs2_jdesc *jd; int error; name.name = buf; mutex_lock(&sdp->sd_jindex_mutex); for (;;) { struct gfs2_inode *jip; error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh); if (error) break; name.len = sprintf(buf, "journal%u", sdp->sd_journals); name.hash = gfs2_disk_hash(name.name, name.len); error = gfs2_dir_check(sdp->sd_jindex, &name, NULL); if (error == -ENOENT) { error = 0; break; } gfs2_glock_dq_uninit(ji_gh); if (error) break; error = -ENOMEM; jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); if (!jd) break; INIT_LIST_HEAD(&jd->extent_list); INIT_LIST_HEAD(&jd->jd_revoke_list); INIT_WORK(&jd->jd_work, gfs2_recover_func); jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1); if (IS_ERR_OR_NULL(jd->jd_inode)) { if (!jd->jd_inode) error = -ENOENT; else error = PTR_ERR(jd->jd_inode); kfree(jd); break; } d_mark_dontcache(jd->jd_inode); spin_lock(&sdp->sd_jindex_spin); jd->jd_jid = sdp->sd_journals++; jip = GFS2_I(jd->jd_inode); jd->jd_no_addr = jip->i_no_addr; list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); spin_unlock(&sdp->sd_jindex_spin); } mutex_unlock(&sdp->sd_jindex_mutex); return error; } /** * init_statfs - look up and initialize master and local (per node) statfs inodes * @sdp: The GFS2 superblock * * This should be called after the jindex is initialized in init_journal() and * before gfs2_journal_recovery() is called because we need to be able to write * to these inodes during recovery. * * Returns: errno */ static int init_statfs(struct gfs2_sbd *sdp) { int error = 0; struct inode *master = d_inode(sdp->sd_master_dir); struct inode *pn = NULL; char buf[30]; struct gfs2_jdesc *jd; struct gfs2_inode *ip; sdp->sd_statfs_inode = gfs2_lookup_meta(master, "statfs"); if (IS_ERR(sdp->sd_statfs_inode)) { error = PTR_ERR(sdp->sd_statfs_inode); fs_err(sdp, "can't read in statfs inode: %d\n", error); goto out; } if (sdp->sd_args.ar_spectator) goto out; pn = gfs2_lookup_meta(master, "per_node"); if (IS_ERR(pn)) { error = PTR_ERR(pn); fs_err(sdp, "can't find per_node directory: %d\n", error); goto put_statfs; } /* For each jid, lookup the corresponding local statfs inode in the * per_node metafs directory and save it in the sdp->sd_sc_inodes_list. */ list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { struct local_statfs_inode *lsi = kmalloc(sizeof(struct local_statfs_inode), GFP_NOFS); if (!lsi) { error = -ENOMEM; goto free_local; } sprintf(buf, "statfs_change%u", jd->jd_jid); lsi->si_sc_inode = gfs2_lookup_meta(pn, buf); if (IS_ERR(lsi->si_sc_inode)) { error = PTR_ERR(lsi->si_sc_inode); fs_err(sdp, "can't find local \"sc\" file#%u: %d\n", jd->jd_jid, error); kfree(lsi); goto free_local; } lsi->si_jid = jd->jd_jid; if (jd->jd_jid == sdp->sd_jdesc->jd_jid) sdp->sd_sc_inode = lsi->si_sc_inode; list_add_tail(&lsi->si_list, &sdp->sd_sc_inodes_list); } iput(pn); pn = NULL; ip = GFS2_I(sdp->sd_sc_inode); error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_NOPID, &sdp->sd_sc_gh); if (error) { fs_err(sdp, "can't lock local \"sc\" file: %d\n", error); goto free_local; } /* read in the local statfs buffer - other nodes don't change it. */ error = gfs2_meta_inode_buffer(ip, &sdp->sd_sc_bh); if (error) { fs_err(sdp, "Cannot read in local statfs: %d\n", error); goto unlock_sd_gh; } return 0; unlock_sd_gh: gfs2_glock_dq_uninit(&sdp->sd_sc_gh); free_local: free_local_statfs_inodes(sdp); iput(pn); put_statfs: iput(sdp->sd_statfs_inode); out: return error; } /* Uninitialize and free up memory used by the list of statfs inodes */ static void uninit_statfs(struct gfs2_sbd *sdp) { if (!sdp->sd_args.ar_spectator) { brelse(sdp->sd_sc_bh); gfs2_glock_dq_uninit(&sdp->sd_sc_gh); free_local_statfs_inodes(sdp); } iput(sdp->sd_statfs_inode); } static int init_journal(struct gfs2_sbd *sdp, int undo) { struct inode *master = d_inode(sdp->sd_master_dir); struct gfs2_holder ji_gh; struct gfs2_inode *ip; int error = 0; gfs2_holder_mark_uninitialized(&ji_gh); if (undo) goto fail_statfs; sdp->sd_jindex = gfs2_lookup_meta(master, "jindex"); if (IS_ERR(sdp->sd_jindex)) { fs_err(sdp, "can't lookup journal index: %d\n", error); return PTR_ERR(sdp->sd_jindex); } /* Load in the journal index special file */ error = gfs2_jindex_hold(sdp, &ji_gh); if (error) { fs_err(sdp, "can't read journal index: %d\n", error); goto fail; } error = -EUSERS; if (!gfs2_jindex_size(sdp)) { fs_err(sdp, "no journals!\n"); goto fail_jindex; } atomic_set(&sdp->sd_log_blks_needed, 0); if (sdp->sd_args.ar_spectator) { sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0); atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); } else { if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) { fs_err(sdp, "can't mount journal #%u\n", sdp->sd_lockstruct.ls_jid); fs_err(sdp, "there are only %u journals (0 - %u)\n", gfs2_jindex_size(sdp), gfs2_jindex_size(sdp) - 1); goto fail_jindex; } sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid); error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid, &gfs2_journal_glops, LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE | GL_NOPID, &sdp->sd_journal_gh); if (error) { fs_err(sdp, "can't acquire journal glock: %d\n", error); goto fail_jindex; } ip = GFS2_I(sdp->sd_jdesc->jd_inode); sdp->sd_jinode_gl = ip->i_gl; error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE | GL_NOPID, &sdp->sd_jinode_gh); if (error) { fs_err(sdp, "can't acquire journal inode glock: %d\n", error); goto fail_journal_gh; } error = gfs2_jdesc_check(sdp->sd_jdesc); if (error) { fs_err(sdp, "my journal (%u) is bad: %d\n", sdp->sd_jdesc->jd_jid, error); goto fail_jinode_gh; } atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); /* Map the extents for this journal's blocks */ gfs2_map_journal_extents(sdp, sdp->sd_jdesc); } trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free)); /* Lookup statfs inodes here so journal recovery can use them. */ error = init_statfs(sdp); if (error) goto fail_jinode_gh; if (sdp->sd_lockstruct.ls_first) { unsigned int x; for (x = 0; x < sdp->sd_journals; x++) { struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x); if (sdp->sd_args.ar_spectator) { error = check_journal_clean(sdp, jd, true); if (error) goto fail_statfs; continue; } error = gfs2_recover_journal(jd, true); if (error) { fs_err(sdp, "error recovering journal %u: %d\n", x, error); goto fail_statfs; } } gfs2_others_may_mount(sdp); } else if (!sdp->sd_args.ar_spectator) { error = gfs2_recover_journal(sdp->sd_jdesc, true); if (error) { fs_err(sdp, "error recovering my journal: %d\n", error); goto fail_statfs; } } sdp->sd_log_idle = 1; set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags); gfs2_glock_dq_uninit(&ji_gh); INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func); return 0; fail_statfs: uninit_statfs(sdp); fail_jinode_gh: /* A withdraw may have done dq/uninit so now we need to check it */ if (!sdp->sd_args.ar_spectator && gfs2_holder_initialized(&sdp->sd_jinode_gh)) gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); fail_journal_gh: if (!sdp->sd_args.ar_spectator && gfs2_holder_initialized(&sdp->sd_journal_gh)) gfs2_glock_dq_uninit(&sdp->sd_journal_gh); fail_jindex: gfs2_jindex_free(sdp); if (gfs2_holder_initialized(&ji_gh)) gfs2_glock_dq_uninit(&ji_gh); fail: iput(sdp->sd_jindex); return error; } static struct lock_class_key gfs2_quota_imutex_key; static int init_inodes(struct gfs2_sbd *sdp, int undo) { int error = 0; struct inode *master = d_inode(sdp->sd_master_dir); if (undo) goto fail_qinode; error = init_journal(sdp, undo); complete_all(&sdp->sd_journal_ready); if (error) goto fail; /* Read in the resource index inode */ sdp->sd_rindex = gfs2_lookup_meta(master, "rindex"); if (IS_ERR(sdp->sd_rindex)) { error = PTR_ERR(sdp->sd_rindex); fs_err(sdp, "can't get resource index inode: %d\n", error); goto fail_journal; } sdp->sd_rindex_uptodate = 0; /* Read in the quota inode */ sdp->sd_quota_inode = gfs2_lookup_meta(master, "quota"); if (IS_ERR(sdp->sd_quota_inode)) { error = PTR_ERR(sdp->sd_quota_inode); fs_err(sdp, "can't get quota file inode: %d\n", error); goto fail_rindex; } /* * i_rwsem on quota files is special. Since this inode is hidden system * file, we are safe to define locking ourselves. */ lockdep_set_class(&sdp->sd_quota_inode->i_rwsem, &gfs2_quota_imutex_key); error = gfs2_rindex_update(sdp); if (error) goto fail_qinode; return 0; fail_qinode: iput(sdp->sd_quota_inode); fail_rindex: gfs2_clear_rgrpd(sdp); iput(sdp->sd_rindex); fail_journal: init_journal(sdp, UNDO); fail: return error; } static int init_per_node(struct gfs2_sbd *sdp, int undo) { struct inode *pn = NULL; char buf[30]; int error = 0; struct gfs2_inode *ip; struct inode *master = d_inode(sdp->sd_master_dir); if (sdp->sd_args.ar_spectator) return 0; if (undo) goto fail_qc_gh; pn = gfs2_lookup_meta(master, "per_node"); if (IS_ERR(pn)) { error = PTR_ERR(pn); fs_err(sdp, "can't find per_node directory: %d\n", error); return error; } sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid); sdp->sd_qc_inode = gfs2_lookup_meta(pn, buf); if (IS_ERR(sdp->sd_qc_inode)) { error = PTR_ERR(sdp->sd_qc_inode); fs_err(sdp, "can't find local \"qc\" file: %d\n", error); goto fail_ut_i; } iput(pn); pn = NULL; ip = GFS2_I(sdp->sd_qc_inode); error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_NOPID, &sdp->sd_qc_gh); if (error) { fs_err(sdp, "can't lock local \"qc\" file: %d\n", error); goto fail_qc_i; } return 0; fail_qc_gh: gfs2_glock_dq_uninit(&sdp->sd_qc_gh); fail_qc_i: iput(sdp->sd_qc_inode); fail_ut_i: iput(pn); return error; } static const match_table_t nolock_tokens = { { Opt_jid, "jid=%d", }, { Opt_err, NULL }, }; static const struct lm_lockops nolock_ops = { .lm_proto_name = "lock_nolock", .lm_put_lock = gfs2_glock_free, .lm_tokens = &nolock_tokens, }; /** * gfs2_lm_mount - mount a locking protocol * @sdp: the filesystem * @silent: if 1, don't complain if the FS isn't a GFS2 fs * * Returns: errno */ static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) { const struct lm_lockops *lm; struct lm_lockstruct *ls = &sdp->sd_lockstruct; struct gfs2_args *args = &sdp->sd_args; const char *proto = sdp->sd_proto_name; const char *table = sdp->sd_table_name; char *o, *options; int ret; if (!strcmp("lock_nolock", proto)) { lm = &nolock_ops; sdp->sd_args.ar_localflocks = 1; #ifdef CONFIG_GFS2_FS_LOCKING_DLM } else if (!strcmp("lock_dlm", proto)) { lm = &gfs2_dlm_ops; #endif } else { pr_info("can't find protocol %s\n", proto); return -ENOENT; } fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); ls->ls_ops = lm; ls->ls_first = 1; for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) { substring_t tmp[MAX_OPT_ARGS]; int token, option; if (!o || !*o) continue; token = match_token(o, *lm->lm_tokens, tmp); switch (token) { case Opt_jid: ret = match_int(&tmp[0], &option); if (ret || option < 0) goto hostdata_error; if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags)) ls->ls_jid = option; break; case Opt_id: case Opt_nodir: /* Obsolete, but left for backward compat purposes */ break; case Opt_first: ret = match_int(&tmp[0], &option); if (ret || (option != 0 && option != 1)) goto hostdata_error; ls->ls_first = option; break; case Opt_err: default: hostdata_error: fs_info(sdp, "unknown hostdata (%s)\n", o); return -EINVAL; } } if (lm->lm_mount == NULL) { fs_info(sdp, "Now mounting FS (format %u)...\n", sdp->sd_sb.sb_fs_format); complete_all(&sdp->sd_locking_init); return 0; } ret = lm->lm_mount(sdp, table); if (ret == 0) fs_info(sdp, "Joined cluster. Now mounting FS (format %u)...\n", sdp->sd_sb.sb_fs_format); complete_all(&sdp->sd_locking_init); return ret; } void gfs2_lm_unmount(struct gfs2_sbd *sdp) { const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops; if (!gfs2_withdrawing_or_withdrawn(sdp) && lm->lm_unmount) lm->lm_unmount(sdp); } static int wait_on_journal(struct gfs2_sbd *sdp) { if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) return 0; return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE) ? -EINTR : 0; } void gfs2_online_uevent(struct gfs2_sbd *sdp) { struct super_block *sb = sdp->sd_vfs; char ro[20]; char spectator[20]; char *envp[] = { ro, spectator, NULL }; sprintf(ro, "RDONLY=%d", sb_rdonly(sb)); sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp); } static int init_threads(struct gfs2_sbd *sdp) { struct task_struct *p; int error = 0; p = kthread_create(gfs2_logd, sdp, "gfs2_logd/%s", sdp->sd_fsname); if (IS_ERR(p)) { error = PTR_ERR(p); fs_err(sdp, "can't create logd thread: %d\n", error); return error; } get_task_struct(p); sdp->sd_logd_process = p; p = kthread_create(gfs2_quotad, sdp, "gfs2_quotad/%s", sdp->sd_fsname); if (IS_ERR(p)) { error = PTR_ERR(p); fs_err(sdp, "can't create quotad thread: %d\n", error); goto fail; } get_task_struct(p); sdp->sd_quotad_process = p; wake_up_process(sdp->sd_logd_process); wake_up_process(sdp->sd_quotad_process); return 0; fail: kthread_stop_put(sdp->sd_logd_process); sdp->sd_logd_process = NULL; return error; } void gfs2_destroy_threads(struct gfs2_sbd *sdp) { if (sdp->sd_logd_process) { kthread_stop_put(sdp->sd_logd_process); sdp->sd_logd_process = NULL; } if (sdp->sd_quotad_process) { kthread_stop_put(sdp->sd_quotad_process); sdp->sd_quotad_process = NULL; } } /** * gfs2_fill_super - Read in superblock * @sb: The VFS superblock * @fc: Mount options and flags * * Returns: -errno */ static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc) { struct gfs2_args *args = fc->fs_private; int silent = fc->sb_flags & SB_SILENT; struct gfs2_sbd *sdp; struct gfs2_holder mount_gh; int error; sdp = init_sbd(sb); if (!sdp) { pr_warn("can't alloc struct gfs2_sbd\n"); return -ENOMEM; } sdp->sd_args = *args; if (sdp->sd_args.ar_spectator) { sb->s_flags |= SB_RDONLY; set_bit(SDF_RORECOVERY, &sdp->sd_flags); } if (sdp->sd_args.ar_posix_acl) sb->s_flags |= SB_POSIXACL; if (sdp->sd_args.ar_nobarrier) set_bit(SDF_NOBARRIERS, &sdp->sd_flags); sb->s_flags |= SB_NOSEC; sb->s_magic = GFS2_MAGIC; sb->s_op = &gfs2_super_ops; sb->s_d_op = &gfs2_dops; sb->s_export_op = &gfs2_export_ops; sb->s_qcop = &gfs2_quotactl_ops; sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; sb->s_time_gran = 1; sb->s_maxbytes = MAX_LFS_FILESIZE; /* Set up the buffer cache and fill in some fake block size values to allow us to read-in the on-disk superblock. */ sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, 512); sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits; sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - 9; sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift); sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit; sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum; if (sdp->sd_args.ar_statfs_quantum) { sdp->sd_tune.gt_statfs_slow = 0; sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum; } else { sdp->sd_tune.gt_statfs_slow = 1; sdp->sd_tune.gt_statfs_quantum = 30; } error = init_names(sdp, silent); if (error) goto fail_free; snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s", sdp->sd_table_name); sdp->sd_delete_wq = alloc_workqueue("gfs2-delete/%s", WQ_MEM_RECLAIM | WQ_FREEZABLE, 0, sdp->sd_fsname); error = -ENOMEM; if (!sdp->sd_delete_wq) goto fail_free; error = gfs2_sys_fs_add(sdp); if (error) goto fail_delete_wq; gfs2_create_debugfs_file(sdp); error = gfs2_lm_mount(sdp, silent); if (error) goto fail_debug; error = init_locking(sdp, &mount_gh, DO); if (error) goto fail_lm; error = init_sb(sdp, silent); if (error) goto fail_locking; /* Turn rgrplvb on by default if fs format is recent enough */ if (!sdp->sd_args.ar_got_rgrplvb && sdp->sd_sb.sb_fs_format > 1801) sdp->sd_args.ar_rgrplvb = 1; error = wait_on_journal(sdp); if (error) goto fail_sb; /* * If user space has failed to join the cluster or some similar * failure has occurred, then the journal id will contain a * negative (error) number. This will then be returned to the * caller (of the mount syscall). We do this even for spectator * mounts (which just write a jid of 0 to indicate "ok" even though * the jid is unused in the spectator case) */ if (sdp->sd_lockstruct.ls_jid < 0) { error = sdp->sd_lockstruct.ls_jid; sdp->sd_lockstruct.ls_jid = 0; goto fail_sb; } if (sdp->sd_args.ar_spectator) snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.s", sdp->sd_table_name); else snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.%u", sdp->sd_table_name, sdp->sd_lockstruct.ls_jid); error = init_inodes(sdp, DO); if (error) goto fail_sb; error = init_per_node(sdp, DO); if (error) goto fail_inodes; error = gfs2_statfs_init(sdp); if (error) { fs_err(sdp, "can't initialize statfs subsystem: %d\n", error); goto fail_per_node; } if (!sb_rdonly(sb)) { error = init_threads(sdp); if (error) goto fail_per_node; } error = gfs2_freeze_lock_shared(sdp); if (error) goto fail_per_node; if (!sb_rdonly(sb)) error = gfs2_make_fs_rw(sdp); if (error) { gfs2_freeze_unlock(&sdp->sd_freeze_gh); gfs2_destroy_threads(sdp); fs_err(sdp, "can't make FS RW: %d\n", error); goto fail_per_node; } gfs2_glock_dq_uninit(&mount_gh); gfs2_online_uevent(sdp); return 0; fail_per_node: init_per_node(sdp, UNDO); fail_inodes: init_inodes(sdp, UNDO); fail_sb: if (sdp->sd_root_dir) dput(sdp->sd_root_dir); if (sdp->sd_master_dir) dput(sdp->sd_master_dir); if (sb->s_root) dput(sb->s_root); sb->s_root = NULL; fail_locking: init_locking(sdp, &mount_gh, UNDO); fail_lm: complete_all(&sdp->sd_journal_ready); gfs2_gl_hash_clear(sdp); gfs2_lm_unmount(sdp); fail_debug: gfs2_delete_debugfs_file(sdp); gfs2_sys_fs_del(sdp); fail_delete_wq: destroy_workqueue(sdp->sd_delete_wq); fail_free: free_sbd(sdp); sb->s_fs_info = NULL; return error; } /** * gfs2_get_tree - Get the GFS2 superblock and root directory * @fc: The filesystem context * * Returns: 0 or -errno on error */ static int gfs2_get_tree(struct fs_context *fc) { struct gfs2_args *args = fc->fs_private; struct gfs2_sbd *sdp; int error; error = get_tree_bdev(fc, gfs2_fill_super); if (error) return error; sdp = fc->root->d_sb->s_fs_info; dput(fc->root); if (args->ar_meta) fc->root = dget(sdp->sd_master_dir); else fc->root = dget(sdp->sd_root_dir); return 0; } static void gfs2_fc_free(struct fs_context *fc) { struct gfs2_args *args = fc->fs_private; kfree(args); } enum gfs2_param { Opt_lockproto, Opt_locktable, Opt_hostdata, Opt_spectator, Opt_ignore_local_fs, Opt_localflocks, Opt_localcaching, Opt_debug, Opt_upgrade, Opt_acl, Opt_quota, Opt_quota_flag, Opt_suiddir, Opt_data, Opt_meta, Opt_discard, Opt_commit, Opt_errors, Opt_statfs_quantum, Opt_statfs_percent, Opt_quota_quantum, Opt_barrier, Opt_rgrplvb, Opt_loccookie, }; static const struct constant_table gfs2_param_quota[] = { {"off", GFS2_QUOTA_OFF}, {"account", GFS2_QUOTA_ACCOUNT}, {"on", GFS2_QUOTA_ON}, {"quiet", GFS2_QUOTA_QUIET}, {} }; enum opt_data { Opt_data_writeback = GFS2_DATA_WRITEBACK, Opt_data_ordered = GFS2_DATA_ORDERED, }; static const struct constant_table gfs2_param_data[] = { {"writeback", Opt_data_writeback }, {"ordered", Opt_data_ordered }, {} }; enum opt_errors { Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW, Opt_errors_panic = GFS2_ERRORS_PANIC, }; static const struct constant_table gfs2_param_errors[] = { {"withdraw", Opt_errors_withdraw }, {"panic", Opt_errors_panic }, {} }; static const struct fs_parameter_spec gfs2_fs_parameters[] = { fsparam_string ("lockproto", Opt_lockproto), fsparam_string ("locktable", Opt_locktable), fsparam_string ("hostdata", Opt_hostdata), fsparam_flag ("spectator", Opt_spectator), fsparam_flag ("norecovery", Opt_spectator), fsparam_flag ("ignore_local_fs", Opt_ignore_local_fs), fsparam_flag ("localflocks", Opt_localflocks), fsparam_flag ("localcaching", Opt_localcaching), fsparam_flag_no("debug", Opt_debug), fsparam_flag ("upgrade", Opt_upgrade), fsparam_flag_no("acl", Opt_acl), fsparam_flag_no("suiddir", Opt_suiddir), fsparam_enum ("data", Opt_data, gfs2_param_data), fsparam_flag ("meta", Opt_meta), fsparam_flag_no("discard", Opt_discard), fsparam_s32 ("commit", Opt_commit), fsparam_enum ("errors", Opt_errors, gfs2_param_errors), fsparam_s32 ("statfs_quantum", Opt_statfs_quantum), fsparam_s32 ("statfs_percent", Opt_statfs_percent), fsparam_s32 ("quota_quantum", Opt_quota_quantum), fsparam_flag_no("barrier", Opt_barrier), fsparam_flag_no("rgrplvb", Opt_rgrplvb), fsparam_flag_no("loccookie", Opt_loccookie), /* quota can be a flag or an enum so it gets special treatment */ fsparam_flag_no("quota", Opt_quota_flag), fsparam_enum("quota", Opt_quota, gfs2_param_quota), {} }; /* Parse a single mount parameter */ static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param) { struct gfs2_args *args = fc->fs_private; struct fs_parse_result result; int o; o = fs_parse(fc, gfs2_fs_parameters, param, &result); if (o < 0) return o; switch (o) { case Opt_lockproto: strscpy(args->ar_lockproto, param->string, GFS2_LOCKNAME_LEN); break; case Opt_locktable: strscpy(args->ar_locktable, param->string, GFS2_LOCKNAME_LEN); break; case Opt_hostdata: strscpy(args->ar_hostdata, param->string, GFS2_LOCKNAME_LEN); break; case Opt_spectator: args->ar_spectator = 1; break; case Opt_ignore_local_fs: /* Retained for backwards compat only */ break; case Opt_localflocks: args->ar_localflocks = 1; break; case Opt_localcaching: /* Retained for backwards compat only */ break; case Opt_debug: if (result.boolean && args->ar_errors == GFS2_ERRORS_PANIC) return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive"); args->ar_debug = result.boolean; break; case Opt_upgrade: /* Retained for backwards compat only */ break; case Opt_acl: args->ar_posix_acl = result.boolean; break; case Opt_quota_flag: args->ar_quota = result.negated ? GFS2_QUOTA_OFF : GFS2_QUOTA_ON; break; case Opt_quota: args->ar_quota = result.int_32; break; case Opt_suiddir: args->ar_suiddir = result.boolean; break; case Opt_data: /* The uint_32 result maps directly to GFS2_DATA_* */ args->ar_data = result.uint_32; break; case Opt_meta: args->ar_meta = 1; break; case Opt_discard: args->ar_discard = result.boolean; break; case Opt_commit: if (result.int_32 <= 0) return invalfc(fc, "commit mount option requires a positive numeric argument"); args->ar_commit = result.int_32; break; case Opt_statfs_quantum: if (result.int_32 < 0) return invalfc(fc, "statfs_quantum mount option requires a non-negative numeric argument"); args->ar_statfs_quantum = result.int_32; break; case Opt_quota_quantum: if (result.int_32 <= 0) return invalfc(fc, "quota_quantum mount option requires a positive numeric argument"); args->ar_quota_quantum = result.int_32; break; case Opt_statfs_percent: if (result.int_32 < 0 || result.int_32 > 100) return invalfc(fc, "statfs_percent mount option requires a numeric argument between 0 and 100"); args->ar_statfs_percent = result.int_32; break; case Opt_errors: if (args->ar_debug && result.uint_32 == GFS2_ERRORS_PANIC) return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive"); args->ar_errors = result.uint_32; break; case Opt_barrier: args->ar_nobarrier = result.boolean; break; case Opt_rgrplvb: args->ar_rgrplvb = result.boolean; args->ar_got_rgrplvb = 1; break; case Opt_loccookie: args->ar_loccookie = result.boolean; break; default: return invalfc(fc, "invalid mount option: %s", param->key); } return 0; } static int gfs2_reconfigure(struct fs_context *fc) { struct super_block *sb = fc->root->d_sb; struct gfs2_sbd *sdp = sb->s_fs_info; struct gfs2_args *oldargs = &sdp->sd_args; struct gfs2_args *newargs = fc->fs_private; struct gfs2_tune *gt = &sdp->sd_tune; int error = 0; sync_filesystem(sb); spin_lock(>->gt_spin); oldargs->ar_commit = gt->gt_logd_secs; oldargs->ar_quota_quantum = gt->gt_quota_quantum; if (gt->gt_statfs_slow) oldargs->ar_statfs_quantum = 0; else oldargs->ar_statfs_quantum = gt->gt_statfs_quantum; spin_unlock(>->gt_spin); if (strcmp(newargs->ar_lockproto, oldargs->ar_lockproto)) { errorfc(fc, "reconfiguration of locking protocol not allowed"); return -EINVAL; } if (strcmp(newargs->ar_locktable, oldargs->ar_locktable)) { errorfc(fc, "reconfiguration of lock table not allowed"); return -EINVAL; } if (strcmp(newargs->ar_hostdata, oldargs->ar_hostdata)) { errorfc(fc, "reconfiguration of host data not allowed"); return -EINVAL; } if (newargs->ar_spectator != oldargs->ar_spectator) { errorfc(fc, "reconfiguration of spectator mode not allowed"); return -EINVAL; } if (newargs->ar_localflocks != oldargs->ar_localflocks) { errorfc(fc, "reconfiguration of localflocks not allowed"); return -EINVAL; } if (newargs->ar_meta != oldargs->ar_meta) { errorfc(fc, "switching between gfs2 and gfs2meta not allowed"); return -EINVAL; } if (oldargs->ar_spectator) fc->sb_flags |= SB_RDONLY; if ((sb->s_flags ^ fc->sb_flags) & SB_RDONLY) { if (fc->sb_flags & SB_RDONLY) { gfs2_make_fs_ro(sdp); } else { error = gfs2_make_fs_rw(sdp); if (error) errorfc(fc, "unable to remount read-write"); } } sdp->sd_args = *newargs; if (sdp->sd_args.ar_posix_acl) sb->s_flags |= SB_POSIXACL; else sb->s_flags &= ~SB_POSIXACL; if (sdp->sd_args.ar_nobarrier) set_bit(SDF_NOBARRIERS, &sdp->sd_flags); else clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); spin_lock(>->gt_spin); gt->gt_logd_secs = newargs->ar_commit; gt->gt_quota_quantum = newargs->ar_quota_quantum; if (newargs->ar_statfs_quantum) { gt->gt_statfs_slow = 0; gt->gt_statfs_quantum = newargs->ar_statfs_quantum; } else { gt->gt_statfs_slow = 1; gt->gt_statfs_quantum = 30; } spin_unlock(>->gt_spin); gfs2_online_uevent(sdp); return error; } static const struct fs_context_operations gfs2_context_ops = { .free = gfs2_fc_free, .parse_param = gfs2_parse_param, .get_tree = gfs2_get_tree, .reconfigure = gfs2_reconfigure, }; /* Set up the filesystem mount context */ static int gfs2_init_fs_context(struct fs_context *fc) { struct gfs2_args *args; args = kmalloc(sizeof(*args), GFP_KERNEL); if (args == NULL) return -ENOMEM; if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { struct gfs2_sbd *sdp = fc->root->d_sb->s_fs_info; *args = sdp->sd_args; } else { memset(args, 0, sizeof(*args)); args->ar_quota = GFS2_QUOTA_DEFAULT; args->ar_data = GFS2_DATA_DEFAULT; args->ar_commit = 30; args->ar_statfs_quantum = 30; args->ar_quota_quantum = 60; args->ar_errors = GFS2_ERRORS_DEFAULT; } fc->fs_private = args; fc->ops = &gfs2_context_ops; return 0; } static int set_meta_super(struct super_block *s, struct fs_context *fc) { return -EINVAL; } static int test_meta_super(struct super_block *s, struct fs_context *fc) { return (fc->sget_key == s->s_bdev); } static int gfs2_meta_get_tree(struct fs_context *fc) { struct super_block *s; struct gfs2_sbd *sdp; struct path path; int error; if (!fc->source || !*fc->source) return -EINVAL; error = kern_path(fc->source, LOOKUP_FOLLOW, &path); if (error) { pr_warn("path_lookup on %s returned error %d\n", fc->source, error); return error; } fc->fs_type = &gfs2_fs_type; fc->sget_key = path.dentry->d_sb->s_bdev; s = sget_fc(fc, test_meta_super, set_meta_super); path_put(&path); if (IS_ERR(s)) { pr_warn("gfs2 mount does not exist\n"); return PTR_ERR(s); } if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY) { deactivate_locked_super(s); return -EBUSY; } sdp = s->s_fs_info; fc->root = dget(sdp->sd_master_dir); return 0; } static const struct fs_context_operations gfs2_meta_context_ops = { .free = gfs2_fc_free, .get_tree = gfs2_meta_get_tree, }; static int gfs2_meta_init_fs_context(struct fs_context *fc) { int ret = gfs2_init_fs_context(fc); if (ret) return ret; fc->ops = &gfs2_meta_context_ops; return 0; } /** * gfs2_evict_inodes - evict inodes cooperatively * @sb: the superblock * * When evicting an inode with a zero link count, we are trying to upgrade the * inode's iopen glock from SH to EX mode in order to determine if we can * delete the inode. The other nodes are supposed to evict the inode from * their caches if they can, and to poke the inode's inode glock if they cannot * do so. Either behavior allows gfs2_upgrade_iopen_glock() to proceed * quickly, but if the other nodes are not cooperating, the lock upgrading * attempt will time out. Since inodes are evicted sequentially, this can add * up quickly. * * Function evict_inodes() tries to keep the s_inode_list_lock list locked over * a long time, which prevents other inodes from being evicted concurrently. * This precludes the cooperative behavior we are looking for. This special * version of evict_inodes() avoids that. * * Modeled after drop_pagecache_sb(). */ static void gfs2_evict_inodes(struct super_block *sb) { struct inode *inode, *toput_inode = NULL; struct gfs2_sbd *sdp = sb->s_fs_info; set_bit(SDF_EVICTING, &sdp->sd_flags); spin_lock(&sb->s_inode_list_lock); list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { spin_lock(&inode->i_lock); if ((inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW)) && !need_resched()) { spin_unlock(&inode->i_lock); continue; } atomic_inc(&inode->i_count); spin_unlock(&inode->i_lock); spin_unlock(&sb->s_inode_list_lock); iput(toput_inode); toput_inode = inode; cond_resched(); spin_lock(&sb->s_inode_list_lock); } spin_unlock(&sb->s_inode_list_lock); iput(toput_inode); } static void gfs2_kill_sb(struct super_block *sb) { struct gfs2_sbd *sdp = sb->s_fs_info; if (sdp == NULL) { kill_block_super(sb); return; } gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SYNC | GFS2_LFC_KILL_SB); dput(sdp->sd_root_dir); dput(sdp->sd_master_dir); sdp->sd_root_dir = NULL; sdp->sd_master_dir = NULL; shrink_dcache_sb(sb); gfs2_evict_inodes(sb); /* * Flush and then drain the delete workqueue here (via * destroy_workqueue()) to ensure that any delete work that * may be running will also see the SDF_KILL flag. */ set_bit(SDF_KILL, &sdp->sd_flags); gfs2_flush_delete_work(sdp); destroy_workqueue(sdp->sd_delete_wq); kill_block_super(sb); } struct file_system_type gfs2_fs_type = { .name = "gfs2", .fs_flags = FS_REQUIRES_DEV, .init_fs_context = gfs2_init_fs_context, .parameters = gfs2_fs_parameters, .kill_sb = gfs2_kill_sb, .owner = THIS_MODULE, }; MODULE_ALIAS_FS("gfs2"); struct file_system_type gfs2meta_fs_type = { .name = "gfs2meta", .fs_flags = FS_REQUIRES_DEV, .init_fs_context = gfs2_meta_init_fs_context, .owner = THIS_MODULE, }; MODULE_ALIAS_FS("gfs2meta");
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