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-rw-r--r--fs/reiserfs/super.c2663
1 files changed, 2663 insertions, 0 deletions
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
new file mode 100644
index 000000000..831a542c2
--- /dev/null
+++ b/fs/reiserfs/super.c
@@ -0,0 +1,2663 @@
+/*
+ * 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 = kmem_cache_alloc(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_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
+}
+
+static void reiserfs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, reiserfs_i_callback);
+}
+
+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,
+ .destroy_inode = reiserfs_destroy_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 =
+ i_size_read(s->s_bdev->bd_inode) >> s->
+ s_blocksize_bits;
+ } 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);
+ char *new_opts;
+ int err;
+ char *qf_names[REISERFS_MAXQUOTAS];
+ unsigned int qfmt = 0;
+#ifdef CONFIG_QUOTA
+ int i;
+#endif
+
+ new_opts = kstrdup(arg, GFP_KERNEL);
+ if (arg && !new_opts)
+ return -ENOMEM;
+
+ 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:
+ kfree(new_opts);
+ 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;
+ }
+
+ 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)
+{
+ ll_rw_block(REQ_OP_READ, 0, 1, &SB_BUFFER_WITH_SB(s));
+ wait_on_buffer(SB_BUFFER_WITH_SB(s));
+ if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
+ 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;
+ }
+
+ 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 (s->s_bdev && s->s_bdev->bd_inode
+ && i_size_read(s->s_bdev->bd_inode) <
+ 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, NULL);
+ 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 =
+ sb->s_blocksize - offset <
+ toread ? 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 = sb->s_blocksize - offset < towrite ?
+ 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->i_mtime = inode->i_ctime = current_time(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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 00:37:25 +0000