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![Linus Torvalds](/assets/img/avatar_default.png)
Pull fourth vfs update from Al Viro: "d_inode() annotations from David Howells (sat in for-next since before the beginning of merge window) + four assorted fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: RCU pathwalk breakage when running into a symlink overmounting something fix I_DIO_WAKEUP definition direct-io: only inc/dec inode->i_dio_count for file systems fs/9p: fix readdir() VFS: assorted d_backing_inode() annotations VFS: fs/inode.c helpers: d_inode() annotations VFS: fs/cachefiles: d_backing_inode() annotations VFS: fs library helpers: d_inode() annotations VFS: assorted weird filesystems: d_inode() annotations VFS: normal filesystems (and lustre): d_inode() annotations VFS: security/: d_inode() annotations VFS: security/: d_backing_inode() annotations VFS: net/: d_inode() annotations VFS: net/unix: d_backing_inode() annotations VFS: kernel/: d_inode() annotations VFS: audit: d_backing_inode() annotations VFS: Fix up some ->d_inode accesses in the chelsio driver VFS: Cachefiles should perform fs modifications on the top layer only VFS: AF_UNIX sockets should call mknod on the top layer only
2563 lines
68 KiB
C
2563 lines
68 KiB
C
/*
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* Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
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*
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* Trivial changes by Alan Cox to add the LFS fixes
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*
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* Trivial Changes:
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* Rights granted to Hans Reiser to redistribute under other terms providing
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* he accepts all liability including but not limited to patent, fitness
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* for purpose, and direct or indirect claims arising from failure to perform.
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*
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* NO WARRANTY
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/time.h>
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#include <linux/uaccess.h>
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#include "reiserfs.h"
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#include "acl.h"
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#include "xattr.h"
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/buffer_head.h>
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#include <linux/exportfs.h>
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#include <linux/quotaops.h>
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#include <linux/vfs.h>
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#include <linux/mount.h>
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#include <linux/namei.h>
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#include <linux/crc32.h>
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#include <linux/seq_file.h>
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struct file_system_type reiserfs_fs_type;
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static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
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static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
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static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
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int is_reiserfs_3_5(struct reiserfs_super_block *rs)
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{
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return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
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strlen(reiserfs_3_5_magic_string));
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}
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int is_reiserfs_3_6(struct reiserfs_super_block *rs)
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{
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return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
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strlen(reiserfs_3_6_magic_string));
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}
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int is_reiserfs_jr(struct reiserfs_super_block *rs)
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{
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return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
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strlen(reiserfs_jr_magic_string));
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}
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static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
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{
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return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
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is_reiserfs_jr(rs));
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}
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static int reiserfs_remount(struct super_block *s, int *flags, char *data);
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static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
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static int reiserfs_sync_fs(struct super_block *s, int wait)
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{
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struct reiserfs_transaction_handle th;
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/*
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* Writeback quota in non-journalled quota case - journalled quota has
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* no dirty dquots
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*/
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dquot_writeback_dquots(s, -1);
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reiserfs_write_lock(s);
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if (!journal_begin(&th, s, 1))
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if (!journal_end_sync(&th))
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reiserfs_flush_old_commits(s);
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reiserfs_write_unlock(s);
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return 0;
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}
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static void flush_old_commits(struct work_struct *work)
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{
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struct reiserfs_sb_info *sbi;
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struct super_block *s;
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sbi = container_of(work, struct reiserfs_sb_info, old_work.work);
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s = sbi->s_journal->j_work_sb;
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spin_lock(&sbi->old_work_lock);
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sbi->work_queued = 0;
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spin_unlock(&sbi->old_work_lock);
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reiserfs_sync_fs(s, 1);
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}
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void reiserfs_schedule_old_flush(struct super_block *s)
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{
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struct reiserfs_sb_info *sbi = REISERFS_SB(s);
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unsigned long delay;
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/*
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* Avoid scheduling flush when sb is being shut down. It can race
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* with journal shutdown and free still queued delayed work.
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*/
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if (s->s_flags & MS_RDONLY || !(s->s_flags & MS_ACTIVE))
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return;
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spin_lock(&sbi->old_work_lock);
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if (!sbi->work_queued) {
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delay = msecs_to_jiffies(dirty_writeback_interval * 10);
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queue_delayed_work(system_long_wq, &sbi->old_work, delay);
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sbi->work_queued = 1;
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}
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spin_unlock(&sbi->old_work_lock);
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}
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static void cancel_old_flush(struct super_block *s)
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{
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struct reiserfs_sb_info *sbi = REISERFS_SB(s);
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cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
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spin_lock(&sbi->old_work_lock);
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sbi->work_queued = 0;
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spin_unlock(&sbi->old_work_lock);
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}
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static int reiserfs_freeze(struct super_block *s)
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{
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struct reiserfs_transaction_handle th;
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cancel_old_flush(s);
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reiserfs_write_lock(s);
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if (!(s->s_flags & MS_RDONLY)) {
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int err = journal_begin(&th, s, 1);
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if (err) {
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reiserfs_block_writes(&th);
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} else {
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reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
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1);
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journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
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reiserfs_block_writes(&th);
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journal_end_sync(&th);
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}
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}
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reiserfs_write_unlock(s);
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return 0;
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}
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static int reiserfs_unfreeze(struct super_block *s)
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{
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reiserfs_allow_writes(s);
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return 0;
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}
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extern const struct in_core_key MAX_IN_CORE_KEY;
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/*
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* this is used to delete "save link" when there are no items of a
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* file it points to. It can either happen if unlink is completed but
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* "save unlink" removal, or if file has both unlink and truncate
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* pending and as unlink completes first (because key of "save link"
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* protecting unlink is bigger that a key lf "save link" which
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* protects truncate), so there left no items to make truncate
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* completion on
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*/
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static int remove_save_link_only(struct super_block *s,
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struct reiserfs_key *key, int oid_free)
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{
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struct reiserfs_transaction_handle th;
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int err;
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/* we are going to do one balancing */
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err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
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if (err)
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return err;
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reiserfs_delete_solid_item(&th, NULL, key);
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if (oid_free)
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/* removals are protected by direct items */
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reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
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return journal_end(&th);
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}
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#ifdef CONFIG_QUOTA
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static int reiserfs_quota_on_mount(struct super_block *, int);
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#endif
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/* look for uncompleted unlinks and truncates and complete them */
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static int finish_unfinished(struct super_block *s)
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{
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INITIALIZE_PATH(path);
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struct cpu_key max_cpu_key, obj_key;
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struct reiserfs_key save_link_key, last_inode_key;
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int retval = 0;
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struct item_head *ih;
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struct buffer_head *bh;
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int item_pos;
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char *item;
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int done;
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struct inode *inode;
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int truncate;
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#ifdef CONFIG_QUOTA
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int i;
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int ms_active_set;
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int quota_enabled[REISERFS_MAXQUOTAS];
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#endif
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/* compose key to look for "save" links */
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max_cpu_key.version = KEY_FORMAT_3_5;
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max_cpu_key.on_disk_key.k_dir_id = ~0U;
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max_cpu_key.on_disk_key.k_objectid = ~0U;
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set_cpu_key_k_offset(&max_cpu_key, ~0U);
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max_cpu_key.key_length = 3;
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memset(&last_inode_key, 0, sizeof(last_inode_key));
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#ifdef CONFIG_QUOTA
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/* Needed for iput() to work correctly and not trash data */
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if (s->s_flags & MS_ACTIVE) {
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ms_active_set = 0;
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} else {
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ms_active_set = 1;
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s->s_flags |= MS_ACTIVE;
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}
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/* Turn on quotas so that they are updated correctly */
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for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
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quota_enabled[i] = 1;
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if (REISERFS_SB(s)->s_qf_names[i]) {
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int ret;
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if (sb_has_quota_active(s, i)) {
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quota_enabled[i] = 0;
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continue;
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}
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ret = reiserfs_quota_on_mount(s, i);
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if (ret < 0)
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reiserfs_warning(s, "reiserfs-2500",
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"cannot turn on journaled "
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"quota: error %d", ret);
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}
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}
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#endif
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done = 0;
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REISERFS_SB(s)->s_is_unlinked_ok = 1;
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while (!retval) {
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int depth;
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retval = search_item(s, &max_cpu_key, &path);
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if (retval != ITEM_NOT_FOUND) {
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reiserfs_error(s, "vs-2140",
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"search_by_key returned %d", retval);
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break;
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}
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bh = get_last_bh(&path);
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item_pos = get_item_pos(&path);
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if (item_pos != B_NR_ITEMS(bh)) {
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reiserfs_warning(s, "vs-2060",
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"wrong position found");
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break;
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}
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item_pos--;
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ih = item_head(bh, item_pos);
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if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
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/* there are no "save" links anymore */
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break;
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save_link_key = ih->ih_key;
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if (is_indirect_le_ih(ih))
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truncate = 1;
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else
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truncate = 0;
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/* reiserfs_iget needs k_dirid and k_objectid only */
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item = ih_item_body(bh, ih);
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obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
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obj_key.on_disk_key.k_objectid =
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le32_to_cpu(ih->ih_key.k_objectid);
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obj_key.on_disk_key.k_offset = 0;
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obj_key.on_disk_key.k_type = 0;
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pathrelse(&path);
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inode = reiserfs_iget(s, &obj_key);
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if (!inode) {
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/*
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* the unlink almost completed, it just did not
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* manage to remove "save" link and release objectid
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*/
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reiserfs_warning(s, "vs-2180", "iget failed for %K",
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&obj_key);
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retval = remove_save_link_only(s, &save_link_key, 1);
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continue;
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}
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if (!truncate && inode->i_nlink) {
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/* file is not unlinked */
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reiserfs_warning(s, "vs-2185",
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"file %K is not unlinked",
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&obj_key);
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retval = remove_save_link_only(s, &save_link_key, 0);
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continue;
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}
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depth = reiserfs_write_unlock_nested(inode->i_sb);
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dquot_initialize(inode);
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reiserfs_write_lock_nested(inode->i_sb, depth);
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if (truncate && S_ISDIR(inode->i_mode)) {
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/*
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* We got a truncate request for a dir which
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* is impossible. The only imaginable way is to
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* execute unfinished truncate request then boot
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* into old kernel, remove the file and create dir
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* with the same key.
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*/
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reiserfs_warning(s, "green-2101",
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"impossible truncate on a "
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"directory %k. Please report",
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INODE_PKEY(inode));
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retval = remove_save_link_only(s, &save_link_key, 0);
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truncate = 0;
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iput(inode);
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continue;
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}
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if (truncate) {
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REISERFS_I(inode)->i_flags |=
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i_link_saved_truncate_mask;
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/*
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* not completed truncate found. New size was
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* committed together with "save" link
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*/
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reiserfs_info(s, "Truncating %k to %lld ..",
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INODE_PKEY(inode), inode->i_size);
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/* don't update modification time */
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reiserfs_truncate_file(inode, 0);
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retval = remove_save_link(inode, truncate);
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} else {
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REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
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/* not completed unlink (rmdir) found */
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reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
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if (memcmp(&last_inode_key, INODE_PKEY(inode),
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sizeof(last_inode_key))){
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last_inode_key = *INODE_PKEY(inode);
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/* removal gets completed in iput */
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retval = 0;
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} else {
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reiserfs_warning(s, "super-2189", "Dead loop "
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"in finish_unfinished "
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"detected, just remove "
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"save link\n");
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retval = remove_save_link_only(s,
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&save_link_key, 0);
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}
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}
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iput(inode);
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printk("done\n");
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done++;
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}
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REISERFS_SB(s)->s_is_unlinked_ok = 0;
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#ifdef CONFIG_QUOTA
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/* Turn quotas off */
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reiserfs_write_unlock(s);
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for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
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if (sb_dqopt(s)->files[i] && quota_enabled[i])
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dquot_quota_off(s, i);
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}
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reiserfs_write_lock(s);
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if (ms_active_set)
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/* Restore the flag back */
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s->s_flags &= ~MS_ACTIVE;
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#endif
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pathrelse(&path);
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if (done)
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reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
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"Completed\n", done);
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return retval;
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}
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/*
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* to protect file being unlinked from getting lost we "safe" link files
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* being unlinked. This link will be deleted in the same transaction with last
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* item of file. mounting the filesystem we scan all these links and remove
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* files which almost got lost
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*/
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void add_save_link(struct reiserfs_transaction_handle *th,
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struct inode *inode, int truncate)
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{
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INITIALIZE_PATH(path);
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int retval;
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struct cpu_key key;
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struct item_head ih;
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__le32 link;
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BUG_ON(!th->t_trans_id);
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/* file can only get one "save link" of each kind */
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RFALSE(truncate &&
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(REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
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"saved link already exists for truncated inode %lx",
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(long)inode->i_ino);
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RFALSE(!truncate &&
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(REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
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"saved link already exists for unlinked inode %lx",
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(long)inode->i_ino);
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/* setup key of "save" link */
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key.version = KEY_FORMAT_3_5;
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key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
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key.on_disk_key.k_objectid = inode->i_ino;
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if (!truncate) {
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/* unlink, rmdir, rename */
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set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
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set_cpu_key_k_type(&key, TYPE_DIRECT);
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/* item head of "safe" link */
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make_le_item_head(&ih, &key, key.version,
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1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
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4 /*length */ , 0xffff /*free space */ );
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} else {
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/* truncate */
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if (S_ISDIR(inode->i_mode))
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reiserfs_warning(inode->i_sb, "green-2102",
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"Adding a truncate savelink for "
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"a directory %k! Please report",
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INODE_PKEY(inode));
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set_cpu_key_k_offset(&key, 1);
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set_cpu_key_k_type(&key, TYPE_INDIRECT);
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/* item head of "safe" link */
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make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
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4 /*length */ , 0 /*free space */ );
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}
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key.key_length = 3;
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|
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/* look for its place in the tree */
|
|
retval = search_item(inode->i_sb, &key, &path);
|
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if (retval != ITEM_NOT_FOUND) {
|
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if (retval != -ENOSPC)
|
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reiserfs_error(inode->i_sb, "vs-2100",
|
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"search_by_key (%K) returned %d", &key,
|
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retval);
|
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pathrelse(&path);
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return;
|
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}
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|
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/* body of "save" link */
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link = INODE_PKEY(inode)->k_dir_id;
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|
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/* put "save" link into tree, don't charge quota to anyone */
|
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retval =
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reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
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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);
|
|
}
|
|
|
|
static void reiserfs_put_super(struct super_block *s)
|
|
{
|
|
struct reiserfs_transaction_handle th;
|
|
th.t_trans_id = 0;
|
|
|
|
dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
|
|
|
|
reiserfs_write_lock(s);
|
|
|
|
/*
|
|
* change file system state to current state if it was mounted
|
|
* with read-write permissions
|
|
*/
|
|
if (!(s->s_flags & MS_RDONLY)) {
|
|
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(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 = (struct reiserfs_inode_info *)
|
|
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),
|
|
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 (inode->i_sb->s_flags & MS_RDONLY) {
|
|
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_printf(seq, ",jdev=%s", 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_printf(seq, ",usrjquota=%s", 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_printf(seq, ",grpjquota=%s", 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, 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,
|
|
};
|
|
|
|
static const struct quotactl_ops reiserfs_qctl_operations = {
|
|
.quota_on = reiserfs_quota_on,
|
|
.quota_off = dquot_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 =
|
|
s->s_bdev->bd_inode->i_size >> 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 (*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 (qf_names[qtype] !=
|
|
REISERFS_SB(s)->s_qf_names[qtype])
|
|
kfree(qf_names[qtype]);
|
|
qf_names[qtype] = NULL;
|
|
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 = kstrdup(arg, GFP_KERNEL);
|
|
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 & MS_RDONLY) {
|
|
reiserfs_write_unlock(s);
|
|
reiserfs_xattr_init(s, *mount_flags);
|
|
/* remount read-only */
|
|
if (s->s_flags & MS_RDONLY)
|
|
/* 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 (!(s->s_flags & MS_RDONLY)) {
|
|
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 &= ~MS_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 &= ~MS_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 & MS_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:
|
|
replace_mount_options(s, new_opts);
|
|
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(READ, 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 &&
|
|
!(s->s_flags & MS_RDONLY) &&
|
|
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;
|
|
|
|
save_mount_options(s, data);
|
|
|
|
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;
|
|
}
|
|
}
|
|
#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;
|
|
|
|
if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
|
|
SWARN(silent, s, "clm-7000",
|
|
"Detected readonly device, marking FS readonly");
|
|
s->s_flags |= MS_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);
|
|
}
|
|
|
|
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 (!(s->s_flags & MS_RDONLY)) {
|
|
|
|
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);
|
|
|
|
cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
|
|
|
|
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->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,
|
|
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);
|
|
return dquot_quota_on(sb, type, format_id, path);
|
|
out:
|
|
reiserfs_write_unlock(sb);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* 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_version++;
|
|
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
|
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);
|