| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jan Kara | 4774 | 39.74% | 33 | 12.94% |
| Linus Torvalds | 3025 | 25.18% | 19 | 7.45% |
| Jeff Mahoney | 869 | 7.23% | 24 | 9.41% |
| Andrew Morton | 831 | 6.92% | 22 | 8.63% |
| Oleg Drokin | 787 | 6.55% | 8 | 3.14% |
| Artem B. Bityutskiy | 271 | 2.26% | 2 | 0.78% |
| Linus Torvalds (pre-git) | 206 | 1.71% | 35 | 13.73% |
| Al Viro | 197 | 1.64% | 20 | 7.84% |
| Hans Reiser | 160 | 1.33% | 7 | 2.75% |
| Dave Jones | 133 | 1.11% | 3 | 1.18% |
| Chris Mason | 94 | 0.78% | 4 | 1.57% |
| David Howells | 80 | 0.67% | 5 | 1.96% |
| Coly Li | 72 | 0.60% | 1 | 0.39% |
| Lepton Wu | 71 | 0.59% | 1 | 0.39% |
| Christoph Hellwig | 64 | 0.53% | 15 | 5.88% |
| yu kuai | 47 | 0.39% | 1 | 0.39% |
| Frédéric Weisbecker | 44 | 0.37% | 5 | 1.96% |
| Miklos Szeredi | 42 | 0.35% | 1 | 0.39% |
| Vladimir V. Saveliev | 31 | 0.26% | 2 | 0.78% |
| Jan Harkes | 25 | 0.21% | 3 | 1.18% |
| Paolo 'Blaisorblade' Giarrusso | 21 | 0.17% | 1 | 0.39% |
| Deepa Dinamani | 21 | 0.17% | 2 | 0.78% |
| Jiangshan Yi | 16 | 0.13% | 1 | 0.39% |
| Takashi Sato | 14 | 0.12% | 1 | 0.39% |
| Jiri Slaby | 13 | 0.11% | 1 | 0.39% |
| Neil Brown | 11 | 0.09% | 1 | 0.39% |
| Fabian Frederick | 7 | 0.06% | 4 | 1.57% |
| Adrian Bunk | 7 | 0.06% | 1 | 0.39% |
| Kees Cook | 6 | 0.05% | 1 | 0.39% |
| Christoph Lameter | 6 | 0.05% | 3 | 1.18% |
| Eric W. Biedermann | 5 | 0.04% | 1 | 0.39% |
| zhangyi (F) | 5 | 0.04% | 1 | 0.39% |
| Theodore Y. Ts'o | 5 | 0.04% | 1 | 0.39% |
| Jeff Layton | 5 | 0.04% | 2 | 0.78% |
| James Lamanna | 4 | 0.03% | 1 | 0.39% |
| Jan Blunck | 4 | 0.03% | 2 | 0.78% |
| Paul Jackson | 4 | 0.03% | 2 | 0.78% |
| Kirill A. Shutemov | 4 | 0.03% | 1 | 0.39% |
| Thomas Gleixner | 4 | 0.03% | 1 | 0.39% |
| Sudip Mukherjee | 3 | 0.02% | 1 | 0.39% |
| Song Muchun | 3 | 0.02% | 1 | 0.39% |
| Nicholas Piggin | 3 | 0.02% | 1 | 0.39% |
| Brian Gerst | 3 | 0.02% | 1 | 0.39% |
| Julia Lawall | 2 | 0.02% | 1 | 0.39% |
| Alexey Dobriyan | 2 | 0.02% | 2 | 0.78% |
| Martin J. Bligh | 2 | 0.02% | 1 | 0.39% |
| Rusty Russell | 2 | 0.02% | 1 | 0.39% |
| Vladimir Davydov | 2 | 0.02% | 1 | 0.39% |
| Yan Burman | 1 | 0.01% | 1 | 0.39% |
| Ionut-Gabriel Radu | 1 | 0.01% | 1 | 0.39% |
| Josef 'Jeff' Sipek | 1 | 0.01% | 1 | 0.39% |
| Mike Galbraith | 1 | 0.01% | 1 | 0.39% |
| Lucas De Marchi | 1 | 0.01% | 1 | 0.39% |
| Andries E. Brouwer | 1 | 0.01% | 1 | 0.39% |
| Total | 12013 | 255 |
/* * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README * * Trivial changes by Alan Cox to add the LFS fixes * * Trivial Changes: * Rights granted to Hans Reiser to redistribute under other terms providing * he accepts all liability including but not limited to patent, fitness * for purpose, and direct or indirect claims arising from failure to perform. * * NO WARRANTY */ #include <linux/module.h> #include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/time.h> #include <linux/uaccess.h> #include "reiserfs.h" #include "acl.h" #include "xattr.h" #include <linux/init.h> #include <linux/blkdev.h> #include <linux/backing-dev.h> #include <linux/buffer_head.h> #include <linux/exportfs.h> #include <linux/quotaops.h> #include <linux/vfs.h> #include <linux/mount.h> #include <linux/namei.h> #include <linux/crc32.h> #include <linux/seq_file.h> struct file_system_type reiserfs_fs_type; static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; int is_reiserfs_3_5(struct reiserfs_super_block *rs) { return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, strlen(reiserfs_3_5_magic_string)); } int is_reiserfs_3_6(struct reiserfs_super_block *rs) { return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, strlen(reiserfs_3_6_magic_string)); } int is_reiserfs_jr(struct reiserfs_super_block *rs) { return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, strlen(reiserfs_jr_magic_string)); } static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) { return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || is_reiserfs_jr(rs)); } static int reiserfs_remount(struct super_block *s, int *flags, char *data); static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); static int reiserfs_sync_fs(struct super_block *s, int wait) { struct reiserfs_transaction_handle th; /* * Writeback quota in non-journalled quota case - journalled quota has * no dirty dquots */ dquot_writeback_dquots(s, -1); reiserfs_write_lock(s); if (!journal_begin(&th, s, 1)) if (!journal_end_sync(&th)) reiserfs_flush_old_commits(s); reiserfs_write_unlock(s); return 0; } static void flush_old_commits(struct work_struct *work) { struct reiserfs_sb_info *sbi; struct super_block *s; sbi = container_of(work, struct reiserfs_sb_info, old_work.work); s = sbi->s_journal->j_work_sb; /* * We need s_umount for protecting quota writeback. We have to use * trylock as reiserfs_cancel_old_flush() may be waiting for this work * to complete with s_umount held. */ if (!down_read_trylock(&s->s_umount)) { /* Requeue work if we are not cancelling it */ spin_lock(&sbi->old_work_lock); if (sbi->work_queued == 1) queue_delayed_work(system_long_wq, &sbi->old_work, HZ); spin_unlock(&sbi->old_work_lock); return; } spin_lock(&sbi->old_work_lock); /* Avoid clobbering the cancel state... */ if (sbi->work_queued == 1) sbi->work_queued = 0; spin_unlock(&sbi->old_work_lock); reiserfs_sync_fs(s, 1); up_read(&s->s_umount); } void reiserfs_schedule_old_flush(struct super_block *s) { struct reiserfs_sb_info *sbi = REISERFS_SB(s); unsigned long delay; /* * Avoid scheduling flush when sb is being shut down. It can race * with journal shutdown and free still queued delayed work. */ if (sb_rdonly(s) || !(s->s_flags & SB_ACTIVE)) return; spin_lock(&sbi->old_work_lock); if (!sbi->work_queued) { delay = msecs_to_jiffies(dirty_writeback_interval * 10); queue_delayed_work(system_long_wq, &sbi->old_work, delay); sbi->work_queued = 1; } spin_unlock(&sbi->old_work_lock); } void reiserfs_cancel_old_flush(struct super_block *s) { struct reiserfs_sb_info *sbi = REISERFS_SB(s); spin_lock(&sbi->old_work_lock); /* Make sure no new flushes will be queued */ sbi->work_queued = 2; spin_unlock(&sbi->old_work_lock); cancel_delayed_work_sync(&REISERFS_SB(s)->old_work); } static int reiserfs_freeze(struct super_block *s) { struct reiserfs_transaction_handle th; reiserfs_cancel_old_flush(s); reiserfs_write_lock(s); if (!sb_rdonly(s)) { int err = journal_begin(&th, s, 1); if (err) { reiserfs_block_writes(&th); } else { reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); reiserfs_block_writes(&th); journal_end_sync(&th); } } reiserfs_write_unlock(s); return 0; } static int reiserfs_unfreeze(struct super_block *s) { struct reiserfs_sb_info *sbi = REISERFS_SB(s); reiserfs_allow_writes(s); spin_lock(&sbi->old_work_lock); /* Allow old_work to run again */ sbi->work_queued = 0; spin_unlock(&sbi->old_work_lock); return 0; } extern const struct in_core_key MAX_IN_CORE_KEY; /* * this is used to delete "save link" when there are no items of a * file it points to. It can either happen if unlink is completed but * "save unlink" removal, or if file has both unlink and truncate * pending and as unlink completes first (because key of "save link" * protecting unlink is bigger that a key lf "save link" which * protects truncate), so there left no items to make truncate * completion on */ static int remove_save_link_only(struct super_block *s, struct reiserfs_key *key, int oid_free) { struct reiserfs_transaction_handle th; int err; /* we are going to do one balancing */ err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); if (err) return err; reiserfs_delete_solid_item(&th, NULL, key); if (oid_free) /* removals are protected by direct items */ reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); return journal_end(&th); } #ifdef CONFIG_QUOTA static int reiserfs_quota_on_mount(struct super_block *, int); #endif /* * Look for uncompleted unlinks and truncates and complete them * * Called with superblock write locked. If quotas are enabled, we have to * release/retake lest we call dquot_quota_on_mount(), proceed to * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per * cpu worklets to complete flush_async_commits() that in turn wait for the * superblock write lock. */ static int finish_unfinished(struct super_block *s) { INITIALIZE_PATH(path); struct cpu_key max_cpu_key, obj_key; struct reiserfs_key save_link_key, last_inode_key; int retval = 0; struct item_head *ih; struct buffer_head *bh; int item_pos; char *item; int done; struct inode *inode; int truncate; #ifdef CONFIG_QUOTA int i; int ms_active_set; int quota_enabled[REISERFS_MAXQUOTAS]; #endif /* compose key to look for "save" links */ max_cpu_key.version = KEY_FORMAT_3_5; max_cpu_key.on_disk_key.k_dir_id = ~0U; max_cpu_key.on_disk_key.k_objectid = ~0U; set_cpu_key_k_offset(&max_cpu_key, ~0U); max_cpu_key.key_length = 3; memset(&last_inode_key, 0, sizeof(last_inode_key)); #ifdef CONFIG_QUOTA /* Needed for iput() to work correctly and not trash data */ if (s->s_flags & SB_ACTIVE) { ms_active_set = 0; } else { ms_active_set = 1; s->s_flags |= SB_ACTIVE; } /* Turn on quotas so that they are updated correctly */ for (i = 0; i < REISERFS_MAXQUOTAS; i++) { quota_enabled[i] = 1; if (REISERFS_SB(s)->s_qf_names[i]) { int ret; if (sb_has_quota_active(s, i)) { quota_enabled[i] = 0; continue; } reiserfs_write_unlock(s); ret = reiserfs_quota_on_mount(s, i); reiserfs_write_lock(s); if (ret < 0) reiserfs_warning(s, "reiserfs-2500", "cannot turn on journaled " "quota: error %d", ret); } } #endif done = 0; REISERFS_SB(s)->s_is_unlinked_ok = 1; while (!retval) { int depth; retval = search_item(s, &max_cpu_key, &path); if (retval != ITEM_NOT_FOUND) { reiserfs_error(s, "vs-2140", "search_by_key returned %d", retval); break; } bh = get_last_bh(&path); item_pos = get_item_pos(&path); if (item_pos != B_NR_ITEMS(bh)) { reiserfs_warning(s, "vs-2060", "wrong position found"); break; } item_pos--; ih = item_head(bh, item_pos); if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) /* there are no "save" links anymore */ break; save_link_key = ih->ih_key; if (is_indirect_le_ih(ih)) truncate = 1; else truncate = 0; /* reiserfs_iget needs k_dirid and k_objectid only */ item = ih_item_body(bh, ih); obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); obj_key.on_disk_key.k_objectid = le32_to_cpu(ih->ih_key.k_objectid); obj_key.on_disk_key.k_offset = 0; obj_key.on_disk_key.k_type = 0; pathrelse(&path); inode = reiserfs_iget(s, &obj_key); if (IS_ERR_OR_NULL(inode)) { /* * the unlink almost completed, it just did not * manage to remove "save" link and release objectid */ reiserfs_warning(s, "vs-2180", "iget failed for %K", &obj_key); retval = remove_save_link_only(s, &save_link_key, 1); continue; } if (!truncate && inode->i_nlink) { /* file is not unlinked */ reiserfs_warning(s, "vs-2185", "file %K is not unlinked", &obj_key); retval = remove_save_link_only(s, &save_link_key, 0); continue; } depth = reiserfs_write_unlock_nested(inode->i_sb); dquot_initialize(inode); reiserfs_write_lock_nested(inode->i_sb, depth); if (truncate && S_ISDIR(inode->i_mode)) { /* * We got a truncate request for a dir which * is impossible. The only imaginable way is to * execute unfinished truncate request then boot * into old kernel, remove the file and create dir * with the same key. */ reiserfs_warning(s, "green-2101", "impossible truncate on a " "directory %k. Please report", INODE_PKEY(inode)); retval = remove_save_link_only(s, &save_link_key, 0); truncate = 0; iput(inode); continue; } if (truncate) { REISERFS_I(inode)->i_flags |= i_link_saved_truncate_mask; /* * not completed truncate found. New size was * committed together with "save" link */ reiserfs_info(s, "Truncating %k to %lld ..", INODE_PKEY(inode), inode->i_size); /* don't update modification time */ reiserfs_truncate_file(inode, 0); retval = remove_save_link(inode, truncate); } else { REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; /* not completed unlink (rmdir) found */ reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); if (memcmp(&last_inode_key, INODE_PKEY(inode), sizeof(last_inode_key))){ last_inode_key = *INODE_PKEY(inode); /* removal gets completed in iput */ retval = 0; } else { reiserfs_warning(s, "super-2189", "Dead loop " "in finish_unfinished " "detected, just remove " "save link\n"); retval = remove_save_link_only(s, &save_link_key, 0); } } iput(inode); printk("done\n"); done++; } REISERFS_SB(s)->s_is_unlinked_ok = 0; #ifdef CONFIG_QUOTA /* Turn quotas off */ reiserfs_write_unlock(s); for (i = 0; i < REISERFS_MAXQUOTAS; i++) { if (sb_dqopt(s)->files[i] && quota_enabled[i]) dquot_quota_off(s, i); } reiserfs_write_lock(s); if (ms_active_set) /* Restore the flag back */ s->s_flags &= ~SB_ACTIVE; #endif pathrelse(&path); if (done) reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " "Completed\n", done); return retval; } /* * to protect file being unlinked from getting lost we "safe" link files * being unlinked. This link will be deleted in the same transaction with last * item of file. mounting the filesystem we scan all these links and remove * files which almost got lost */ void add_save_link(struct reiserfs_transaction_handle *th, struct inode *inode, int truncate) { INITIALIZE_PATH(path); int retval; struct cpu_key key; struct item_head ih; __le32 link; BUG_ON(!th->t_trans_id); /* file can only get one "save link" of each kind */ RFALSE(truncate && (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), "saved link already exists for truncated inode %lx", (long)inode->i_ino); RFALSE(!truncate && (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), "saved link already exists for unlinked inode %lx", (long)inode->i_ino); /* setup key of "save" link */ key.version = KEY_FORMAT_3_5; key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; key.on_disk_key.k_objectid = inode->i_ino; if (!truncate) { /* unlink, rmdir, rename */ set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); set_cpu_key_k_type(&key, TYPE_DIRECT); /* item head of "safe" link */ make_le_item_head(&ih, &key, key.version, 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, 4 /*length */ , 0xffff /*free space */ ); } else { /* truncate */ if (S_ISDIR(inode->i_mode)) reiserfs_warning(inode->i_sb, "green-2102", "Adding a truncate savelink for " "a directory %k! Please report", INODE_PKEY(inode)); set_cpu_key_k_offset(&key, 1); set_cpu_key_k_type(&key, TYPE_INDIRECT); /* item head of "safe" link */ make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, 4 /*length */ , 0 /*free space */ ); } key.key_length = 3; /* look for its place in the tree */ retval = search_item(inode->i_sb, &key, &path); if (retval != ITEM_NOT_FOUND) { if (retval != -ENOSPC) reiserfs_error(inode->i_sb, "vs-2100", "search_by_key (%K) returned %d", &key, retval); pathrelse(&path); return; } /* body of "save" link */ link = INODE_PKEY(inode)->k_dir_id; /* put "save" link into tree, don't charge quota to anyone */ retval = reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); if (retval) { if (retval != -ENOSPC) reiserfs_error(inode->i_sb, "vs-2120", "insert_item returned %d", retval); } else { if (truncate) REISERFS_I(inode)->i_flags |= i_link_saved_truncate_mask; else REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; } } /* this opens transaction unlike add_save_link */ int remove_save_link(struct inode *inode, int truncate) { struct reiserfs_transaction_handle th; struct reiserfs_key key; int err; /* we are going to do one balancing only */ err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); if (err) return err; /* setup key of "save" link */ key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); key.k_objectid = INODE_PKEY(inode)->k_objectid; if (!truncate) { /* unlink, rmdir, rename */ set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1 + inode->i_sb->s_blocksize); set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); } else { /* truncate */ set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); } if ((truncate && (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || (!truncate && (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) /* don't take quota bytes from anywhere */ reiserfs_delete_solid_item(&th, NULL, &key); if (!truncate) { reiserfs_release_objectid(&th, inode->i_ino); REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; } else REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; return journal_end(&th); } static void reiserfs_kill_sb(struct super_block *s) { if (REISERFS_SB(s)) { reiserfs_proc_info_done(s); /* * Force any pending inode evictions to occur now. Any * inodes to be removed that have extended attributes * associated with them need to clean them up before * we can release the extended attribute root dentries. * shrink_dcache_for_umount will BUG if we don't release * those before it's called so ->put_super is too late. */ shrink_dcache_sb(s); dput(REISERFS_SB(s)->xattr_root); REISERFS_SB(s)->xattr_root = NULL; dput(REISERFS_SB(s)->priv_root); REISERFS_SB(s)->priv_root = NULL; } kill_block_super(s); } #ifdef CONFIG_QUOTA static int reiserfs_quota_off(struct super_block *sb, int type); static void reiserfs_quota_off_umount(struct super_block *s) { int type; for (type = 0; type < REISERFS_MAXQUOTAS; type++) reiserfs_quota_off(s, type); } #else static inline void reiserfs_quota_off_umount(struct super_block *s) { } #endif static void reiserfs_put_super(struct super_block *s) { struct reiserfs_transaction_handle th; th.t_trans_id = 0; reiserfs_quota_off_umount(s); reiserfs_write_lock(s); /* * change file system state to current state if it was mounted * with read-write permissions */ if (!sb_rdonly(s)) { if (!journal_begin(&th, s, 10)) { reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); set_sb_umount_state(SB_DISK_SUPER_BLOCK(s), REISERFS_SB(s)->s_mount_state); journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); } } /* * note, journal_release checks for readonly mount, and can * decide not to do a journal_end */ journal_release(&th, s); reiserfs_free_bitmap_cache(s); brelse(SB_BUFFER_WITH_SB(s)); print_statistics(s); if (REISERFS_SB(s)->reserved_blocks != 0) { reiserfs_warning(s, "green-2005", "reserved blocks left %d", REISERFS_SB(s)->reserved_blocks); } reiserfs_write_unlock(s); mutex_destroy(&REISERFS_SB(s)->lock); destroy_workqueue(REISERFS_SB(s)->commit_wq); kfree(REISERFS_SB(s)->s_jdev); kfree(s->s_fs_info); s->s_fs_info = NULL; } static struct kmem_cache *reiserfs_inode_cachep; static struct inode *reiserfs_alloc_inode(struct super_block *sb) { struct reiserfs_inode_info *ei; ei = alloc_inode_sb(sb, reiserfs_inode_cachep, GFP_KERNEL); if (!ei) return NULL; atomic_set(&ei->openers, 0); mutex_init(&ei->tailpack); #ifdef CONFIG_QUOTA memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); #endif return &ei->vfs_inode; } static void reiserfs_free_inode(struct inode *inode) { kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); } static void init_once(void *foo) { struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; INIT_LIST_HEAD(&ei->i_prealloc_list); inode_init_once(&ei->vfs_inode); } static int __init init_inodecache(void) { reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache", sizeof(struct reiserfs_inode_info), 0, (SLAB_RECLAIM_ACCOUNT| SLAB_MEM_SPREAD| SLAB_ACCOUNT), init_once); if (reiserfs_inode_cachep == NULL) return -ENOMEM; return 0; } static void destroy_inodecache(void) { /* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); kmem_cache_destroy(reiserfs_inode_cachep); } /* we don't mark inodes dirty, we just log them */ static void reiserfs_dirty_inode(struct inode *inode, int flags) { struct reiserfs_transaction_handle th; int err = 0; if (sb_rdonly(inode->i_sb)) { reiserfs_warning(inode->i_sb, "clm-6006", "writing inode %lu on readonly FS", inode->i_ino); return; } reiserfs_write_lock(inode->i_sb); /* * this is really only used for atime updates, so they don't have * to be included in O_SYNC or fsync */ err = journal_begin(&th, inode->i_sb, 1); if (err) goto out; reiserfs_update_sd(&th, inode); journal_end(&th); out: reiserfs_write_unlock(inode->i_sb); } static int reiserfs_show_options(struct seq_file *seq, struct dentry *root) { struct super_block *s = root->d_sb; struct reiserfs_journal *journal = SB_JOURNAL(s); long opts = REISERFS_SB(s)->s_mount_opt; if (opts & (1 << REISERFS_LARGETAIL)) seq_puts(seq, ",tails=on"); else if (!(opts & (1 << REISERFS_SMALLTAIL))) seq_puts(seq, ",notail"); /* tails=small is default so we don't show it */ if (!(opts & (1 << REISERFS_BARRIER_FLUSH))) seq_puts(seq, ",barrier=none"); /* barrier=flush is default so we don't show it */ if (opts & (1 << REISERFS_ERROR_CONTINUE)) seq_puts(seq, ",errors=continue"); else if (opts & (1 << REISERFS_ERROR_PANIC)) seq_puts(seq, ",errors=panic"); /* errors=ro is default so we don't show it */ if (opts & (1 << REISERFS_DATA_LOG)) seq_puts(seq, ",data=journal"); else if (opts & (1 << REISERFS_DATA_WRITEBACK)) seq_puts(seq, ",data=writeback"); /* data=ordered is default so we don't show it */ if (opts & (1 << REISERFS_ATTRS)) seq_puts(seq, ",attrs"); if (opts & (1 << REISERFS_XATTRS_USER)) seq_puts(seq, ",user_xattr"); if (opts & (1 << REISERFS_EXPOSE_PRIVROOT)) seq_puts(seq, ",expose_privroot"); if (opts & (1 << REISERFS_POSIXACL)) seq_puts(seq, ",acl"); if (REISERFS_SB(s)->s_jdev) seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev); if (journal->j_max_commit_age != journal->j_default_max_commit_age) seq_printf(seq, ",commit=%d", journal->j_max_commit_age); #ifdef CONFIG_QUOTA if (REISERFS_SB(s)->s_qf_names[USRQUOTA]) seq_show_option(seq, "usrjquota", REISERFS_SB(s)->s_qf_names[USRQUOTA]); else if (opts & (1 << REISERFS_USRQUOTA)) seq_puts(seq, ",usrquota"); if (REISERFS_SB(s)->s_qf_names[GRPQUOTA]) seq_show_option(seq, "grpjquota", REISERFS_SB(s)->s_qf_names[GRPQUOTA]); else if (opts & (1 << REISERFS_GRPQUOTA)) seq_puts(seq, ",grpquota"); if (REISERFS_SB(s)->s_jquota_fmt) { if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD) seq_puts(seq, ",jqfmt=vfsold"); else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0) seq_puts(seq, ",jqfmt=vfsv0"); } #endif /* Block allocator options */ if (opts & (1 << REISERFS_NO_BORDER)) seq_puts(seq, ",block-allocator=noborder"); if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION)) seq_puts(seq, ",block-allocator=no_unhashed_relocation"); if (opts & (1 << REISERFS_HASHED_RELOCATION)) seq_puts(seq, ",block-allocator=hashed_relocation"); if (opts & (1 << REISERFS_TEST4)) seq_puts(seq, ",block-allocator=test4"); show_alloc_options(seq, s); return 0; } #ifdef CONFIG_QUOTA static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, size_t, loff_t); static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, loff_t); static struct dquot **reiserfs_get_dquots(struct inode *inode) { return REISERFS_I(inode)->i_dquot; } #endif static const struct super_operations reiserfs_sops = { .alloc_inode = reiserfs_alloc_inode, .free_inode = reiserfs_free_inode, .write_inode = reiserfs_write_inode, .dirty_inode = reiserfs_dirty_inode, .evict_inode = reiserfs_evict_inode, .put_super = reiserfs_put_super, .sync_fs = reiserfs_sync_fs, .freeze_fs = reiserfs_freeze, .unfreeze_fs = reiserfs_unfreeze, .statfs = reiserfs_statfs, .remount_fs = reiserfs_remount, .show_options = reiserfs_show_options, #ifdef CONFIG_QUOTA .quota_read = reiserfs_quota_read, .quota_write = reiserfs_quota_write, .get_dquots = reiserfs_get_dquots, #endif }; #ifdef CONFIG_QUOTA #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") static int reiserfs_write_dquot(struct dquot *); static int reiserfs_acquire_dquot(struct dquot *); static int reiserfs_release_dquot(struct dquot *); static int reiserfs_mark_dquot_dirty(struct dquot *); static int reiserfs_write_info(struct super_block *, int); static int reiserfs_quota_on(struct super_block *, int, int, const struct path *); static const struct dquot_operations reiserfs_quota_operations = { .write_dquot = reiserfs_write_dquot, .acquire_dquot = reiserfs_acquire_dquot, .release_dquot = reiserfs_release_dquot, .mark_dirty = reiserfs_mark_dquot_dirty, .write_info = reiserfs_write_info, .alloc_dquot = dquot_alloc, .destroy_dquot = dquot_destroy, .get_next_id = dquot_get_next_id, }; static const struct quotactl_ops reiserfs_qctl_operations = { .quota_on = reiserfs_quota_on, .quota_off = reiserfs_quota_off, .quota_sync = dquot_quota_sync, .get_state = dquot_get_state, .set_info = dquot_set_dqinfo, .get_dqblk = dquot_get_dqblk, .set_dqblk = dquot_set_dqblk, }; #endif static const struct export_operations reiserfs_export_ops = { .encode_fh = reiserfs_encode_fh, .fh_to_dentry = reiserfs_fh_to_dentry, .fh_to_parent = reiserfs_fh_to_parent, .get_parent = reiserfs_get_parent, }; /* * this struct is used in reiserfs_getopt () for containing the value for * those mount options that have values rather than being toggles. */ typedef struct { char *value; /* * bitmask which is to set on mount_options bitmask * when this value is found, 0 is no bits are to be changed. */ int setmask; /* * bitmask which is to clear on mount_options bitmask * when this value is found, 0 is no bits are to be changed. * This is applied BEFORE setmask */ int clrmask; } arg_desc_t; /* Set this bit in arg_required to allow empty arguments */ #define REISERFS_OPT_ALLOWEMPTY 31 /* * this struct is used in reiserfs_getopt() for describing the * set of reiserfs mount options */ typedef struct { char *option_name; /* 0 if argument is not required, not 0 otherwise */ int arg_required; /* list of values accepted by an option */ const arg_desc_t *values; /* * bitmask which is to set on mount_options bitmask * when this value is found, 0 is no bits are to be changed. */ int setmask; /* * bitmask which is to clear on mount_options bitmask * when this value is found, 0 is no bits are to be changed. * This is applied BEFORE setmask */ int clrmask; } opt_desc_t; /* possible values for -o data= */ static const arg_desc_t logging_mode[] = { {"ordered", 1 << REISERFS_DATA_ORDERED, (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)}, {"journal", 1 << REISERFS_DATA_LOG, (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)}, {"writeback", 1 << REISERFS_DATA_WRITEBACK, (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)}, {.value = NULL} }; /* possible values for -o barrier= */ static const arg_desc_t barrier_mode[] = { {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH}, {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE}, {.value = NULL} }; /* * possible values for "-o block-allocator=" and bits which are to be set in * s_mount_opt of reiserfs specific part of in-core super block */ static const arg_desc_t balloc[] = { {"noborder", 1 << REISERFS_NO_BORDER, 0}, {"border", 0, 1 << REISERFS_NO_BORDER}, {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0}, {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0}, {"test4", 1 << REISERFS_TEST4, 0}, {"notest4", 0, 1 << REISERFS_TEST4}, {NULL, 0, 0} }; static const arg_desc_t tails[] = { {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL}, {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL}, {NULL, 0, 0} }; static const arg_desc_t error_actions[] = { {"panic", 1 << REISERFS_ERROR_PANIC, (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)}, {"ro-remount", 1 << REISERFS_ERROR_RO, (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)}, #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG {"continue", 1 << REISERFS_ERROR_CONTINUE, (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)}, #endif {NULL, 0, 0}, }; /* * proceed only one option from a list *cur - string containing of mount * options * opts - array of options which are accepted * opt_arg - if option is found and requires an argument and if it is specifed * in the input - pointer to the argument is stored here * bit_flags - if option requires to set a certain bit - it is set here * return -1 if unknown option is found, opt->arg_required otherwise */ static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts, char **opt_arg, unsigned long *bit_flags) { char *p; /* * foo=bar, * ^ ^ ^ * | | +-- option_end * | +-- arg_start * +-- option_start */ const opt_desc_t *opt; const arg_desc_t *arg; p = *cur; /* assume argument cannot contain commas */ *cur = strchr(p, ','); if (*cur) { *(*cur) = '\0'; (*cur)++; } if (!strncmp(p, "alloc=", 6)) { /* * Ugly special case, probably we should redo options * parser so that it can understand several arguments for * some options, also so that it can fill several bitfields * with option values. */ if (reiserfs_parse_alloc_options(s, p + 6)) { return -1; } else { return 0; } } /* for every option in the list */ for (opt = opts; opt->option_name; opt++) { if (!strncmp(p, opt->option_name, strlen(opt->option_name))) { if (bit_flags) { if (opt->clrmask == (1 << REISERFS_UNSUPPORTED_OPT)) reiserfs_warning(s, "super-6500", "%s not supported.\n", p); else *bit_flags &= ~opt->clrmask; if (opt->setmask == (1 << REISERFS_UNSUPPORTED_OPT)) reiserfs_warning(s, "super-6501", "%s not supported.\n", p); else *bit_flags |= opt->setmask; } break; } } if (!opt->option_name) { reiserfs_warning(s, "super-6502", "unknown mount option \"%s\"", p); return -1; } p += strlen(opt->option_name); switch (*p) { case '=': if (!opt->arg_required) { reiserfs_warning(s, "super-6503", "the option \"%s\" does not " "require an argument\n", opt->option_name); return -1; } break; case 0: if (opt->arg_required) { reiserfs_warning(s, "super-6504", "the option \"%s\" requires an " "argument\n", opt->option_name); return -1; } break; default: reiserfs_warning(s, "super-6505", "head of option \"%s\" is only correct\n", opt->option_name); return -1; } /* * move to the argument, or to next option if argument is not * required */ p++; if (opt->arg_required && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY)) && !strlen(p)) { /* this catches "option=," if not allowed */ reiserfs_warning(s, "super-6506", "empty argument for \"%s\"\n", opt->option_name); return -1; } if (!opt->values) { /* *=NULLopt_arg contains pointer to argument */ *opt_arg = p; return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY); } /* values possible for this option are listed in opt->values */ for (arg = opt->values; arg->value; arg++) { if (!strcmp(p, arg->value)) { if (bit_flags) { *bit_flags &= ~arg->clrmask; *bit_flags |= arg->setmask; } return opt->arg_required; } } reiserfs_warning(s, "super-6506", "bad value \"%s\" for option \"%s\"\n", p, opt->option_name); return -1; } /* returns 0 if something is wrong in option string, 1 - otherwise */ static int reiserfs_parse_options(struct super_block *s, /* string given via mount's -o */ char *options, /* * after the parsing phase, contains the * collection of bitflags defining what * mount options were selected. */ unsigned long *mount_options, /* strtol-ed from NNN of resize=NNN */ unsigned long *blocks, char **jdev_name, unsigned int *commit_max_age, char **qf_names, unsigned int *qfmt) { int c; char *arg = NULL; char *pos; opt_desc_t opts[] = { /* * Compatibility stuff, so that -o notail for old * setups still work */ {"tails",.arg_required = 't',.values = tails}, {"notail",.clrmask = (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)}, {"conv",.setmask = 1 << REISERFS_CONVERT}, {"attrs",.setmask = 1 << REISERFS_ATTRS}, {"noattrs",.clrmask = 1 << REISERFS_ATTRS}, {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT}, #ifdef CONFIG_REISERFS_FS_XATTR {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER}, {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER}, #else {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, #endif #ifdef CONFIG_REISERFS_FS_POSIX_ACL {"acl",.setmask = 1 << REISERFS_POSIXACL}, {"noacl",.clrmask = 1 << REISERFS_POSIXACL}, #else {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT}, {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT}, #endif {.option_name = "nolog"}, {"replayonly",.setmask = 1 << REPLAYONLY}, {"block-allocator",.arg_required = 'a',.values = balloc}, {"data",.arg_required = 'd',.values = logging_mode}, {"barrier",.arg_required = 'b',.values = barrier_mode}, {"resize",.arg_required = 'r',.values = NULL}, {"jdev",.arg_required = 'j',.values = NULL}, {"nolargeio",.arg_required = 'w',.values = NULL}, {"commit",.arg_required = 'c',.values = NULL}, {"usrquota",.setmask = 1 << REISERFS_USRQUOTA}, {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA}, {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA}, {"errors",.arg_required = 'e',.values = error_actions}, {"usrjquota",.arg_required = 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, {"grpjquota",.arg_required = 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL}, {"jqfmt",.arg_required = 'f',.values = NULL}, {.option_name = NULL} }; *blocks = 0; if (!options || !*options) /* * use default configuration: create tails, journaling on, no * conversion to newest format */ return 1; for (pos = options; pos;) { c = reiserfs_getopt(s, &pos, opts, &arg, mount_options); if (c == -1) /* wrong option is given */ return 0; if (c == 'r') { char *p; p = NULL; /* "resize=NNN" or "resize=auto" */ if (!strcmp(arg, "auto")) { /* From JFS code, to auto-get the size. */ *blocks = sb_bdev_nr_blocks(s); } else { *blocks = simple_strtoul(arg, &p, 0); if (*p != '\0') { /* NNN does not look like a number */ reiserfs_warning(s, "super-6507", "bad value %s for " "-oresize\n", arg); return 0; } } } if (c == 'c') { char *p = NULL; unsigned long val = simple_strtoul(arg, &p, 0); /* commit=NNN (time in seconds) */ if (*p != '\0' || val >= (unsigned int)-1) { reiserfs_warning(s, "super-6508", "bad value %s for -ocommit\n", arg); return 0; } *commit_max_age = (unsigned int)val; } if (c == 'w') { reiserfs_warning(s, "super-6509", "nolargeio option " "is no longer supported"); return 0; } if (c == 'j') { if (arg && *arg && jdev_name) { /* Hm, already assigned? */ if (*jdev_name) { reiserfs_warning(s, "super-6510", "journal device was " "already specified to " "be %s", *jdev_name); return 0; } *jdev_name = arg; } } #ifdef CONFIG_QUOTA if (c == 'u' || c == 'g') { int qtype = c == 'u' ? USRQUOTA : GRPQUOTA; if (sb_any_quota_loaded(s) && (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) { reiserfs_warning(s, "super-6511", "cannot change journaled " "quota options when quota " "turned on."); return 0; } if (qf_names[qtype] != REISERFS_SB(s)->s_qf_names[qtype]) kfree(qf_names[qtype]); qf_names[qtype] = NULL; if (*arg) { /* Some filename specified? */ if (REISERFS_SB(s)->s_qf_names[qtype] && strcmp(REISERFS_SB(s)->s_qf_names[qtype], arg)) { reiserfs_warning(s, "super-6512", "%s quota file " "already specified.", QTYPE2NAME(qtype)); return 0; } if (strchr(arg, '/')) { reiserfs_warning(s, "super-6513", "quotafile must be " "on filesystem root."); return 0; } qf_names[qtype] = kstrdup(arg, GFP_KERNEL); if (!qf_names[qtype]) { reiserfs_warning(s, "reiserfs-2502", "not enough memory " "for storing " "quotafile name."); return 0; } if (qtype == USRQUOTA) *mount_options |= 1 << REISERFS_USRQUOTA; else *mount_options |= 1 << REISERFS_GRPQUOTA; } else { if (qtype == USRQUOTA) *mount_options &= ~(1 << REISERFS_USRQUOTA); else *mount_options &= ~(1 << REISERFS_GRPQUOTA); } } if (c == 'f') { if (!strcmp(arg, "vfsold")) *qfmt = QFMT_VFS_OLD; else if (!strcmp(arg, "vfsv0")) *qfmt = QFMT_VFS_V0; else { reiserfs_warning(s, "super-6514", "unknown quota format " "specified."); return 0; } if (sb_any_quota_loaded(s) && *qfmt != REISERFS_SB(s)->s_jquota_fmt) { reiserfs_warning(s, "super-6515", "cannot change journaled " "quota options when quota " "turned on."); return 0; } } #else if (c == 'u' || c == 'g' || c == 'f') { reiserfs_warning(s, "reiserfs-2503", "journaled " "quota options not supported."); return 0; } #endif } #ifdef CONFIG_QUOTA if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) { reiserfs_warning(s, "super-6515", "journaled quota format not specified."); return 0; } if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) && sb_has_quota_loaded(s, USRQUOTA)) || (!(*mount_options & (1 << REISERFS_GRPQUOTA)) && sb_has_quota_loaded(s, GRPQUOTA))) { reiserfs_warning(s, "super-6516", "quota options must " "be present when quota is turned on."); return 0; } #endif return 1; } static void switch_data_mode(struct super_block *s, unsigned long mode) { REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) | (1 << REISERFS_DATA_ORDERED) | (1 << REISERFS_DATA_WRITEBACK)); REISERFS_SB(s)->s_mount_opt |= (1 << mode); } static void handle_data_mode(struct super_block *s, unsigned long mount_options) { if (mount_options & (1 << REISERFS_DATA_LOG)) { if (!reiserfs_data_log(s)) { switch_data_mode(s, REISERFS_DATA_LOG); reiserfs_info(s, "switching to journaled data mode\n"); } } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) { if (!reiserfs_data_ordered(s)) { switch_data_mode(s, REISERFS_DATA_ORDERED); reiserfs_info(s, "switching to ordered data mode\n"); } } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) { if (!reiserfs_data_writeback(s)) { switch_data_mode(s, REISERFS_DATA_WRITEBACK); reiserfs_info(s, "switching to writeback data mode\n"); } } } static void handle_barrier_mode(struct super_block *s, unsigned long bits) { int flush = (1 << REISERFS_BARRIER_FLUSH); int none = (1 << REISERFS_BARRIER_NONE); int all_barrier = flush | none; if (bits & all_barrier) { REISERFS_SB(s)->s_mount_opt &= ~all_barrier; if (bits & flush) { REISERFS_SB(s)->s_mount_opt |= flush; printk("reiserfs: enabling write barrier flush mode\n"); } else if (bits & none) { REISERFS_SB(s)->s_mount_opt |= none; printk("reiserfs: write barriers turned off\n"); } } } static void handle_attrs(struct super_block *s) { struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s); if (reiserfs_attrs(s)) { if (old_format_only(s)) { reiserfs_warning(s, "super-6517", "cannot support " "attributes on 3.5.x disk format"); REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); return; } if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) { reiserfs_warning(s, "super-6518", "cannot support " "attributes until flag is set in " "super-block"); REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS); } } } #ifdef CONFIG_QUOTA static void handle_quota_files(struct super_block *s, char **qf_names, unsigned int *qfmt) { int i; for (i = 0; i < REISERFS_MAXQUOTAS; i++) { if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) kfree(REISERFS_SB(s)->s_qf_names[i]); REISERFS_SB(s)->s_qf_names[i] = qf_names[i]; } if (*qfmt) REISERFS_SB(s)->s_jquota_fmt = *qfmt; } #endif static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) { struct reiserfs_super_block *rs; struct reiserfs_transaction_handle th; unsigned long blocks; unsigned long mount_options = REISERFS_SB(s)->s_mount_opt; unsigned long safe_mask = 0; unsigned int commit_max_age = (unsigned int)-1; struct reiserfs_journal *journal = SB_JOURNAL(s); int err; char *qf_names[REISERFS_MAXQUOTAS]; unsigned int qfmt = 0; #ifdef CONFIG_QUOTA int i; #endif sync_filesystem(s); reiserfs_write_lock(s); #ifdef CONFIG_QUOTA memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names)); #endif rs = SB_DISK_SUPER_BLOCK(s); if (!reiserfs_parse_options (s, arg, &mount_options, &blocks, NULL, &commit_max_age, qf_names, &qfmt)) { #ifdef CONFIG_QUOTA for (i = 0; i < REISERFS_MAXQUOTAS; i++) if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) kfree(qf_names[i]); #endif err = -EINVAL; goto out_err_unlock; } #ifdef CONFIG_QUOTA handle_quota_files(s, qf_names, &qfmt); #endif handle_attrs(s); /* Add options that are safe here */ safe_mask |= 1 << REISERFS_SMALLTAIL; safe_mask |= 1 << REISERFS_LARGETAIL; safe_mask |= 1 << REISERFS_NO_BORDER; safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION; safe_mask |= 1 << REISERFS_HASHED_RELOCATION; safe_mask |= 1 << REISERFS_TEST4; safe_mask |= 1 << REISERFS_ATTRS; safe_mask |= 1 << REISERFS_XATTRS_USER; safe_mask |= 1 << REISERFS_POSIXACL; safe_mask |= 1 << REISERFS_BARRIER_FLUSH; safe_mask |= 1 << REISERFS_BARRIER_NONE; safe_mask |= 1 << REISERFS_ERROR_RO; safe_mask |= 1 << REISERFS_ERROR_CONTINUE; safe_mask |= 1 << REISERFS_ERROR_PANIC; safe_mask |= 1 << REISERFS_USRQUOTA; safe_mask |= 1 << REISERFS_GRPQUOTA; /* * Update the bitmask, taking care to keep * the bits we're not allowed to change here */ REISERFS_SB(s)->s_mount_opt = (REISERFS_SB(s)-> s_mount_opt & ~safe_mask) | (mount_options & safe_mask); if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) { journal->j_max_commit_age = commit_max_age; journal->j_max_trans_age = commit_max_age; } else if (commit_max_age == 0) { /* 0 means restore defaults. */ journal->j_max_commit_age = journal->j_default_max_commit_age; journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; } if (blocks) { err = reiserfs_resize(s, blocks); if (err != 0) goto out_err_unlock; } if (*mount_flags & SB_RDONLY) { reiserfs_write_unlock(s); reiserfs_xattr_init(s, *mount_flags); /* remount read-only */ if (sb_rdonly(s)) /* it is read-only already */ goto out_ok_unlocked; err = dquot_suspend(s, -1); if (err < 0) goto out_err; /* try to remount file system with read-only permissions */ if (sb_umount_state(rs) == REISERFS_VALID_FS || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) { goto out_ok_unlocked; } reiserfs_write_lock(s); err = journal_begin(&th, s, 10); if (err) goto out_err_unlock; /* Mounting a rw partition read-only. */ reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state); journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); } else { /* remount read-write */ if (!sb_rdonly(s)) { reiserfs_write_unlock(s); reiserfs_xattr_init(s, *mount_flags); goto out_ok_unlocked; /* We are read-write already */ } if (reiserfs_is_journal_aborted(journal)) { err = journal->j_errno; goto out_err_unlock; } handle_data_mode(s, mount_options); handle_barrier_mode(s, mount_options); REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); /* now it is safe to call journal_begin */ s->s_flags &= ~SB_RDONLY; err = journal_begin(&th, s, 10); if (err) goto out_err_unlock; /* Mount a partition which is read-only, read-write */ reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); s->s_flags &= ~SB_RDONLY; set_sb_umount_state(rs, REISERFS_ERROR_FS); if (!old_format_only(s)) set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */ journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS; } /* this will force a full flush of all journal lists */ SB_JOURNAL(s)->j_must_wait = 1; err = journal_end(&th); if (err) goto out_err_unlock; reiserfs_write_unlock(s); if (!(*mount_flags & SB_RDONLY)) { dquot_resume(s, -1); reiserfs_write_lock(s); finish_unfinished(s); reiserfs_write_unlock(s); reiserfs_xattr_init(s, *mount_flags); } out_ok_unlocked: return 0; out_err_unlock: reiserfs_write_unlock(s); out_err: return err; } static int read_super_block(struct super_block *s, int offset) { struct buffer_head *bh; struct reiserfs_super_block *rs; int fs_blocksize; bh = sb_bread(s, offset / s->s_blocksize); if (!bh) { reiserfs_warning(s, "sh-2006", "bread failed (dev %s, block %lu, size %lu)", s->s_id, offset / s->s_blocksize, s->s_blocksize); return 1; } rs = (struct reiserfs_super_block *)bh->b_data; if (!is_any_reiserfs_magic_string(rs)) { brelse(bh); return 1; } /* * ok, reiserfs signature (old or new) found in at the given offset */ fs_blocksize = sb_blocksize(rs); brelse(bh); sb_set_blocksize(s, fs_blocksize); bh = sb_bread(s, offset / s->s_blocksize); if (!bh) { reiserfs_warning(s, "sh-2007", "bread failed (dev %s, block %lu, size %lu)", s->s_id, offset / s->s_blocksize, s->s_blocksize); return 1; } rs = (struct reiserfs_super_block *)bh->b_data; if (sb_blocksize(rs) != s->s_blocksize) { reiserfs_warning(s, "sh-2011", "can't find a reiserfs " "filesystem on (dev %s, block %llu, size %lu)", s->s_id, (unsigned long long)bh->b_blocknr, s->s_blocksize); brelse(bh); return 1; } if (rs->s_v1.s_root_block == cpu_to_le32(-1)) { brelse(bh); reiserfs_warning(s, "super-6519", "Unfinished reiserfsck " "--rebuild-tree run detected. Please run\n" "reiserfsck --rebuild-tree and wait for a " "completion. If that fails\n" "get newer reiserfsprogs package"); return 1; } reiserfs_warning(NULL, "", "reiserfs filesystem is deprecated and " "scheduled to be removed from the kernel in 2025"); SB_BUFFER_WITH_SB(s) = bh; SB_DISK_SUPER_BLOCK(s) = rs; /* * magic is of non-standard journal filesystem, look at s_version to * find which format is in use */ if (is_reiserfs_jr(rs)) { if (sb_version(rs) == REISERFS_VERSION_2) reiserfs_info(s, "found reiserfs format \"3.6\"" " with non-standard journal\n"); else if (sb_version(rs) == REISERFS_VERSION_1) reiserfs_info(s, "found reiserfs format \"3.5\"" " with non-standard journal\n"); else { reiserfs_warning(s, "sh-2012", "found unknown " "format \"%u\" of reiserfs with " "non-standard magic", sb_version(rs)); return 1; } } else /* * s_version of standard format may contain incorrect * information, so we just look at the magic string */ reiserfs_info(s, "found reiserfs format \"%s\" with standard journal\n", is_reiserfs_3_5(rs) ? "3.5" : "3.6"); s->s_op = &reiserfs_sops; s->s_export_op = &reiserfs_export_ops; #ifdef CONFIG_QUOTA s->s_qcop = &reiserfs_qctl_operations; s->dq_op = &reiserfs_quota_operations; s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; #endif /* * new format is limited by the 32 bit wide i_blocks field, want to * be one full block below that. */ s->s_maxbytes = (512LL << 32) - s->s_blocksize; return 0; } /* after journal replay, reread all bitmap and super blocks */ static int reread_meta_blocks(struct super_block *s) { if (bh_read(SB_BUFFER_WITH_SB(s), 0) < 0) { reiserfs_warning(s, "reiserfs-2504", "error reading the super"); return 1; } return 0; } /* hash detection stuff */ /* * if root directory is empty - we set default - Yura's - hash and * warn about it * FIXME: we look for only one name in a directory. If tea and yura * both have the same value - we ask user to send report to the * mailing list */ static __u32 find_hash_out(struct super_block *s) { int retval; struct inode *inode; struct cpu_key key; INITIALIZE_PATH(path); struct reiserfs_dir_entry de; struct reiserfs_de_head *deh; __u32 hash = DEFAULT_HASH; __u32 deh_hashval, teahash, r5hash, yurahash; inode = d_inode(s->s_root); make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3); retval = search_by_entry_key(s, &key, &path, &de); if (retval == IO_ERROR) { pathrelse(&path); return UNSET_HASH; } if (retval == NAME_NOT_FOUND) de.de_entry_num--; set_de_name_and_namelen(&de); deh = de.de_deh + de.de_entry_num; if (deh_offset(deh) == DOT_DOT_OFFSET) { /* allow override in this case */ if (reiserfs_rupasov_hash(s)) hash = YURA_HASH; reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n"); goto out; } deh_hashval = GET_HASH_VALUE(deh_offset(deh)); r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen)); teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen)); yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen)); if ((teahash == r5hash && deh_hashval == r5hash) || (teahash == yurahash && deh_hashval == yurahash) || (r5hash == yurahash && deh_hashval == yurahash)) { reiserfs_warning(s, "reiserfs-2506", "Unable to automatically detect hash " "function. Please mount with -o " "hash={tea,rupasov,r5}"); hash = UNSET_HASH; goto out; } if (deh_hashval == yurahash) hash = YURA_HASH; else if (deh_hashval == teahash) hash = TEA_HASH; else if (deh_hashval == r5hash) hash = R5_HASH; else { reiserfs_warning(s, "reiserfs-2506", "Unrecognised hash function"); hash = UNSET_HASH; } out: pathrelse(&path); return hash; } /* finds out which hash names are sorted with */ static int what_hash(struct super_block *s) { __u32 code; code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s)); /* * reiserfs_hash_detect() == true if any of the hash mount options * were used. We must check them to make sure the user isn't * using a bad hash value */ if (code == UNSET_HASH || reiserfs_hash_detect(s)) code = find_hash_out(s); if (code != UNSET_HASH && reiserfs_hash_detect(s)) { /* * detection has found the hash, and we must check against the * mount options */ if (reiserfs_rupasov_hash(s) && code != YURA_HASH) { reiserfs_warning(s, "reiserfs-2507", "Error, %s hash detected, " "unable to force rupasov hash", reiserfs_hashname(code)); code = UNSET_HASH; } else if (reiserfs_tea_hash(s) && code != TEA_HASH) { reiserfs_warning(s, "reiserfs-2508", "Error, %s hash detected, " "unable to force tea hash", reiserfs_hashname(code)); code = UNSET_HASH; } else if (reiserfs_r5_hash(s) && code != R5_HASH) { reiserfs_warning(s, "reiserfs-2509", "Error, %s hash detected, " "unable to force r5 hash", reiserfs_hashname(code)); code = UNSET_HASH; } } else { /* * find_hash_out was not called or * could not determine the hash */ if (reiserfs_rupasov_hash(s)) { code = YURA_HASH; } else if (reiserfs_tea_hash(s)) { code = TEA_HASH; } else if (reiserfs_r5_hash(s)) { code = R5_HASH; } } /* * if we are mounted RW, and we have a new valid hash code, update * the super */ if (code != UNSET_HASH && !sb_rdonly(s) && code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) { set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code); } return code; } /* return pointer to appropriate function */ static hashf_t hash_function(struct super_block *s) { switch (what_hash(s)) { case TEA_HASH: reiserfs_info(s, "Using tea hash to sort names\n"); return keyed_hash; case YURA_HASH: reiserfs_info(s, "Using rupasov hash to sort names\n"); return yura_hash; case R5_HASH: reiserfs_info(s, "Using r5 hash to sort names\n"); return r5_hash; } return NULL; } /* this is used to set up correct value for old partitions */ static int function2code(hashf_t func) { if (func == keyed_hash) return TEA_HASH; if (func == yura_hash) return YURA_HASH; if (func == r5_hash) return R5_HASH; BUG(); /* should never happen */ return 0; } #define SWARN(silent, s, id, ...) \ if (!(silent)) \ reiserfs_warning(s, id, __VA_ARGS__) static int reiserfs_fill_super(struct super_block *s, void *data, int silent) { struct inode *root_inode; struct reiserfs_transaction_handle th; int old_format = 0; unsigned long blocks; unsigned int commit_max_age = 0; int jinit_done = 0; struct reiserfs_iget_args args; struct reiserfs_super_block *rs; char *jdev_name; struct reiserfs_sb_info *sbi; int errval = -EINVAL; char *qf_names[REISERFS_MAXQUOTAS] = {}; unsigned int qfmt = 0; sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL); if (!sbi) return -ENOMEM; s->s_fs_info = sbi; /* Set default values for options: non-aggressive tails, RO on errors */ sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL); sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO); sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); /* no preallocation minimum, be smart in reiserfs_file_write instead */ sbi->s_alloc_options.preallocmin = 0; /* Preallocate by 16 blocks (17-1) at once */ sbi->s_alloc_options.preallocsize = 17; /* setup default block allocator options */ reiserfs_init_alloc_options(s); spin_lock_init(&sbi->old_work_lock); INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits); mutex_init(&sbi->lock); sbi->lock_depth = -1; sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0, s->s_id); if (!sbi->commit_wq) { SWARN(silent, s, "", "Cannot allocate commit workqueue"); errval = -ENOMEM; goto error_unlocked; } jdev_name = NULL; if (reiserfs_parse_options (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name, &commit_max_age, qf_names, &qfmt) == 0) { goto error_unlocked; } if (jdev_name && jdev_name[0]) { sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL); if (!sbi->s_jdev) { SWARN(silent, s, "", "Cannot allocate memory for " "journal device name"); goto error_unlocked; } } #ifdef CONFIG_QUOTA handle_quota_files(s, qf_names, &qfmt); #endif if (blocks) { SWARN(silent, s, "jmacd-7", "resize option for remount only"); goto error_unlocked; } /* * try old format (undistributed bitmap, super block in 8-th 1k * block of a device) */ if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES)) old_format = 1; /* * try new format (64-th 1k block), which can contain reiserfs * super block */ else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) { SWARN(silent, s, "sh-2021", "can not find reiserfs on %s", s->s_id); goto error_unlocked; } s->s_time_min = 0; s->s_time_max = U32_MAX; rs = SB_DISK_SUPER_BLOCK(s); /* * Let's do basic sanity check to verify that underlying device is not * smaller than the filesystem. If the check fails then abort and * scream, because bad stuff will happen otherwise. */ if (bdev_nr_bytes(s->s_bdev) < sb_block_count(rs) * sb_blocksize(rs)) { SWARN(silent, s, "", "Filesystem cannot be " "mounted because it is bigger than the device"); SWARN(silent, s, "", "You may need to run fsck " "or increase size of your LVM partition"); SWARN(silent, s, "", "Or may be you forgot to " "reboot after fdisk when it told you to"); goto error_unlocked; } sbi->s_mount_state = SB_REISERFS_STATE(s); sbi->s_mount_state = REISERFS_VALID_FS; if ((errval = reiserfs_init_bitmap_cache(s))) { SWARN(silent, s, "jmacd-8", "unable to read bitmap"); goto error_unlocked; } errval = -EINVAL; #ifdef CONFIG_REISERFS_CHECK SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON"); SWARN(silent, s, "", "- it is slow mode for debugging."); #endif /* make data=ordered the default */ if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) && !reiserfs_data_writeback(s)) { sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED); } if (reiserfs_data_log(s)) { reiserfs_info(s, "using journaled data mode\n"); } else if (reiserfs_data_ordered(s)) { reiserfs_info(s, "using ordered data mode\n"); } else { reiserfs_info(s, "using writeback data mode\n"); } if (reiserfs_barrier_flush(s)) { printk("reiserfs: using flush barriers\n"); } if (journal_init(s, jdev_name, old_format, commit_max_age)) { SWARN(silent, s, "sh-2022", "unable to initialize journal space"); goto error_unlocked; } else { /* * once this is set, journal_release must be called * if we error out of the mount */ jinit_done = 1; } if (reread_meta_blocks(s)) { SWARN(silent, s, "jmacd-9", "unable to reread meta blocks after journal init"); goto error_unlocked; } if (replay_only(s)) goto error_unlocked; s->s_xattr = reiserfs_xattr_handlers; if (bdev_read_only(s->s_bdev) && !sb_rdonly(s)) { SWARN(silent, s, "clm-7000", "Detected readonly device, marking FS readonly"); s->s_flags |= SB_RDONLY; } args.objectid = REISERFS_ROOT_OBJECTID; args.dirid = REISERFS_ROOT_PARENT_OBJECTID; root_inode = iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)&args); if (!root_inode) { SWARN(silent, s, "jmacd-10", "get root inode failed"); goto error_unlocked; } /* * This path assumed to be called with the BKL in the old times. * Now we have inherited the big reiserfs lock from it and many * reiserfs helpers called in the mount path and elsewhere require * this lock to be held even if it's not always necessary. Let's be * conservative and hold it early. The window can be reduced after * careful review of the code. */ reiserfs_write_lock(s); if (root_inode->i_state & I_NEW) { reiserfs_read_locked_inode(root_inode, &args); unlock_new_inode(root_inode); } if (!S_ISDIR(root_inode->i_mode) || !inode_get_bytes(root_inode) || !root_inode->i_size) { SWARN(silent, s, "", "corrupt root inode, run fsck"); iput(root_inode); errval = -EUCLEAN; goto error; } s->s_root = d_make_root(root_inode); if (!s->s_root) goto error; /* define and initialize hash function */ sbi->s_hash_function = hash_function(s); if (sbi->s_hash_function == NULL) { dput(s->s_root); s->s_root = NULL; goto error; } if (is_reiserfs_3_5(rs) || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) set_bit(REISERFS_3_5, &sbi->s_properties); else if (old_format) set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties); else set_bit(REISERFS_3_6, &sbi->s_properties); if (!sb_rdonly(s)) { errval = journal_begin(&th, s, 1); if (errval) { dput(s->s_root); s->s_root = NULL; goto error; } reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); set_sb_umount_state(rs, REISERFS_ERROR_FS); set_sb_fs_state(rs, 0); /* * Clear out s_bmap_nr if it would wrap. We can handle this * case, but older revisions can't. This will cause the * file system to fail mount on those older implementations, * avoiding corruption. -jeffm */ if (bmap_would_wrap(reiserfs_bmap_count(s)) && sb_bmap_nr(rs) != 0) { reiserfs_warning(s, "super-2030", "This file system " "claims to use %u bitmap blocks in " "its super block, but requires %u. " "Clearing to zero.", sb_bmap_nr(rs), reiserfs_bmap_count(s)); set_sb_bmap_nr(rs, 0); } if (old_format_only(s)) { /* * filesystem of format 3.5 either with standard * or non-standard journal */ if (convert_reiserfs(s)) { /* and -o conv is given */ if (!silent) reiserfs_info(s, "converting 3.5 filesystem to the 3.6 format"); if (is_reiserfs_3_5(rs)) /* * put magic string of 3.6 format. * 2.2 will not be able to * mount this filesystem anymore */ memcpy(rs->s_v1.s_magic, reiserfs_3_6_magic_string, sizeof (reiserfs_3_6_magic_string)); set_sb_version(rs, REISERFS_VERSION_2); reiserfs_convert_objectid_map_v1(s); set_bit(REISERFS_3_6, &sbi->s_properties); clear_bit(REISERFS_3_5, &sbi->s_properties); } else if (!silent) { reiserfs_info(s, "using 3.5.x disk format\n"); } } else set_sb_mnt_count(rs, sb_mnt_count(rs) + 1); journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s)); errval = journal_end(&th); if (errval) { dput(s->s_root); s->s_root = NULL; goto error; } reiserfs_write_unlock(s); if ((errval = reiserfs_lookup_privroot(s)) || (errval = reiserfs_xattr_init(s, s->s_flags))) { dput(s->s_root); s->s_root = NULL; goto error_unlocked; } reiserfs_write_lock(s); /* * look for files which were to be removed in previous session */ finish_unfinished(s); } else { if (old_format_only(s) && !silent) { reiserfs_info(s, "using 3.5.x disk format\n"); } reiserfs_write_unlock(s); if ((errval = reiserfs_lookup_privroot(s)) || (errval = reiserfs_xattr_init(s, s->s_flags))) { dput(s->s_root); s->s_root = NULL; goto error_unlocked; } reiserfs_write_lock(s); } /* * mark hash in super block: it could be unset. overwrite should be ok */ set_sb_hash_function_code(rs, function2code(sbi->s_hash_function)); handle_attrs(s); reiserfs_proc_info_init(s); init_waitqueue_head(&(sbi->s_wait)); spin_lock_init(&sbi->bitmap_lock); reiserfs_write_unlock(s); return (0); error: reiserfs_write_unlock(s); error_unlocked: /* kill the commit thread, free journal ram */ if (jinit_done) { reiserfs_write_lock(s); journal_release_error(NULL, s); reiserfs_write_unlock(s); } if (sbi->commit_wq) destroy_workqueue(sbi->commit_wq); reiserfs_cancel_old_flush(s); reiserfs_free_bitmap_cache(s); if (SB_BUFFER_WITH_SB(s)) brelse(SB_BUFFER_WITH_SB(s)); #ifdef CONFIG_QUOTA { int j; for (j = 0; j < REISERFS_MAXQUOTAS; j++) kfree(qf_names[j]); } #endif kfree(sbi->s_jdev); kfree(sbi); s->s_fs_info = NULL; return errval; } static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb); buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize)); buf->f_bfree = sb_free_blocks(rs); buf->f_bavail = buf->f_bfree; buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1; buf->f_bsize = dentry->d_sb->s_blocksize; /* changed to accommodate gcc folks. */ buf->f_type = REISERFS_SUPER_MAGIC; buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, sizeof(rs->s_uuid)/2); return 0; } #ifdef CONFIG_QUOTA static int reiserfs_write_dquot(struct dquot *dquot) { struct reiserfs_transaction_handle th; int ret, err; int depth; reiserfs_write_lock(dquot->dq_sb); ret = journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); if (ret) goto out; depth = reiserfs_write_unlock_nested(dquot->dq_sb); ret = dquot_commit(dquot); reiserfs_write_lock_nested(dquot->dq_sb, depth); err = journal_end(&th); if (!ret && err) ret = err; out: reiserfs_write_unlock(dquot->dq_sb); return ret; } static int reiserfs_acquire_dquot(struct dquot *dquot) { struct reiserfs_transaction_handle th; int ret, err; int depth; reiserfs_write_lock(dquot->dq_sb); ret = journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); if (ret) goto out; depth = reiserfs_write_unlock_nested(dquot->dq_sb); ret = dquot_acquire(dquot); reiserfs_write_lock_nested(dquot->dq_sb, depth); err = journal_end(&th); if (!ret && err) ret = err; out: reiserfs_write_unlock(dquot->dq_sb); return ret; } static int reiserfs_release_dquot(struct dquot *dquot) { struct reiserfs_transaction_handle th; int ret, err; reiserfs_write_lock(dquot->dq_sb); ret = journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); reiserfs_write_unlock(dquot->dq_sb); if (ret) { /* Release dquot anyway to avoid endless cycle in dqput() */ dquot_release(dquot); goto out; } ret = dquot_release(dquot); reiserfs_write_lock(dquot->dq_sb); err = journal_end(&th); if (!ret && err) ret = err; reiserfs_write_unlock(dquot->dq_sb); out: return ret; } static int reiserfs_mark_dquot_dirty(struct dquot *dquot) { /* Are we journaling quotas? */ if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { dquot_mark_dquot_dirty(dquot); return reiserfs_write_dquot(dquot); } else return dquot_mark_dquot_dirty(dquot); } static int reiserfs_write_info(struct super_block *sb, int type) { struct reiserfs_transaction_handle th; int ret, err; int depth; /* Data block + inode block */ reiserfs_write_lock(sb); ret = journal_begin(&th, sb, 2); if (ret) goto out; depth = reiserfs_write_unlock_nested(sb); ret = dquot_commit_info(sb, type); reiserfs_write_lock_nested(sb, depth); err = journal_end(&th); if (!ret && err) ret = err; out: reiserfs_write_unlock(sb); return ret; } /* * Turn on quotas during mount time - we need to find the quota file and such... */ static int reiserfs_quota_on_mount(struct super_block *sb, int type) { return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type], REISERFS_SB(sb)->s_jquota_fmt, type); } /* * Standard function to be called on quota_on */ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, const struct path *path) { int err; struct inode *inode; struct reiserfs_transaction_handle th; int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA; reiserfs_write_lock(sb); if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) { err = -EINVAL; goto out; } /* Quotafile not on the same filesystem? */ if (path->dentry->d_sb != sb) { err = -EXDEV; goto out; } inode = d_inode(path->dentry); /* * We must not pack tails for quota files on reiserfs for quota * IO to work */ if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) { err = reiserfs_unpack(inode); if (err) { reiserfs_warning(sb, "super-6520", "Unpacking tail of quota file failed" " (%d). Cannot turn on quotas.", err); err = -EINVAL; goto out; } mark_inode_dirty(inode); } /* Journaling quota? */ if (REISERFS_SB(sb)->s_qf_names[type]) { /* Quotafile not of fs root? */ if (path->dentry->d_parent != sb->s_root) reiserfs_warning(sb, "super-6521", "Quota file not on filesystem root. " "Journalled quota will not work."); } /* * When we journal data on quota file, we have to flush journal to see * all updates to the file when we bypass pagecache... */ if (reiserfs_file_data_log(inode)) { /* Just start temporary transaction and finish it */ err = journal_begin(&th, sb, 1); if (err) goto out; err = journal_end_sync(&th); if (err) goto out; } reiserfs_write_unlock(sb); err = dquot_quota_on(sb, type, format_id, path); if (!err) { inode_lock(inode); REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL | REISERFS_NOATIME_FL; inode_set_flags(inode, S_IMMUTABLE | S_NOATIME, S_IMMUTABLE | S_NOATIME); inode_unlock(inode); mark_inode_dirty(inode); } return err; out: reiserfs_write_unlock(sb); return err; } static int reiserfs_quota_off(struct super_block *sb, int type) { int err; struct inode *inode = sb_dqopt(sb)->files[type]; if (!inode || !igrab(inode)) goto out; err = dquot_quota_off(sb, type); if (err) goto out_put; inode_lock(inode); REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL | REISERFS_NOATIME_FL); inode_set_flags(inode, 0, S_IMMUTABLE | S_NOATIME); inode_unlock(inode); mark_inode_dirty(inode); out_put: iput(inode); return err; out: return dquot_quota_off(sb, type); } /* * Read data from quotafile - avoid pagecache and such because we cannot afford * acquiring the locks... As quota files are never truncated and quota code * itself serializes the operations (and no one else should touch the files) * we don't have to be afraid of races */ static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off) { struct inode *inode = sb_dqopt(sb)->files[type]; unsigned long blk = off >> sb->s_blocksize_bits; int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; size_t toread; struct buffer_head tmp_bh, *bh; loff_t i_size = i_size_read(inode); if (off > i_size) return 0; if (off + len > i_size) len = i_size - off; toread = len; while (toread > 0) { tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread); tmp_bh.b_state = 0; /* * Quota files are without tails so we can safely * use this function */ reiserfs_write_lock(sb); err = reiserfs_get_block(inode, blk, &tmp_bh, 0); reiserfs_write_unlock(sb); if (err) return err; if (!buffer_mapped(&tmp_bh)) /* A hole? */ memset(data, 0, tocopy); else { bh = sb_bread(sb, tmp_bh.b_blocknr); if (!bh) return -EIO; memcpy(data, bh->b_data + offset, tocopy); brelse(bh); } offset = 0; toread -= tocopy; data += tocopy; blk++; } return len; } /* * Write to quotafile (we know the transaction is already started and has * enough credits) */ static ssize_t reiserfs_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off) { struct inode *inode = sb_dqopt(sb)->files[type]; unsigned long blk = off >> sb->s_blocksize_bits; int err = 0, offset = off & (sb->s_blocksize - 1), tocopy; int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL; size_t towrite = len; struct buffer_head tmp_bh, *bh; if (!current->journal_info) { printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n", (unsigned long long)off, (unsigned long long)len); return -EIO; } while (towrite > 0) { tocopy = min_t(unsigned long, sb->s_blocksize - offset, towrite); tmp_bh.b_state = 0; reiserfs_write_lock(sb); err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); reiserfs_write_unlock(sb); if (err) goto out; if (offset || tocopy != sb->s_blocksize) bh = sb_bread(sb, tmp_bh.b_blocknr); else bh = sb_getblk(sb, tmp_bh.b_blocknr); if (!bh) { err = -EIO; goto out; } lock_buffer(bh); memcpy(bh->b_data + offset, data, tocopy); flush_dcache_page(bh->b_page); set_buffer_uptodate(bh); unlock_buffer(bh); reiserfs_write_lock(sb); reiserfs_prepare_for_journal(sb, bh, 1); journal_mark_dirty(current->journal_info, bh); if (!journal_quota) reiserfs_add_ordered_list(inode, bh); reiserfs_write_unlock(sb); brelse(bh); offset = 0; towrite -= tocopy; data += tocopy; blk++; } out: if (len == towrite) return err; if (inode->i_size < off + len - towrite) i_size_write(inode, off + len - towrite); inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); mark_inode_dirty(inode); return len - towrite; } #endif static struct dentry *get_super_block(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); } static int __init init_reiserfs_fs(void) { int ret; ret = init_inodecache(); if (ret) return ret; reiserfs_proc_info_global_init(); ret = register_filesystem(&reiserfs_fs_type); if (ret) goto out; return 0; out: reiserfs_proc_info_global_done(); destroy_inodecache(); return ret; } static void __exit exit_reiserfs_fs(void) { reiserfs_proc_info_global_done(); unregister_filesystem(&reiserfs_fs_type); destroy_inodecache(); } struct file_system_type reiserfs_fs_type = { .owner = THIS_MODULE, .name = "reiserfs", .mount = get_super_block, .kill_sb = reiserfs_kill_sb, .fs_flags = FS_REQUIRES_DEV, }; MODULE_ALIAS_FS("reiserfs"); MODULE_DESCRIPTION("ReiserFS journaled filesystem"); MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); MODULE_LICENSE("GPL"); module_init(init_reiserfs_fs); module_exit(exit_reiserfs_fs);
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