diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/reiserfs/super.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/reiserfs/super.c | 2369 |
1 files changed, 0 insertions, 2369 deletions
diff --git a/ANDROID_3.4.5/fs/reiserfs/super.c b/ANDROID_3.4.5/fs/reiserfs/super.c deleted file mode 100644 index 8b7616ef..00000000 --- a/ANDROID_3.4.5/fs/reiserfs/super.c +++ /dev/null @@ -1,2369 +0,0 @@ -/* - * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README - * - * Trivial changes by Alan Cox to add the LFS fixes - * - * Trivial Changes: - * Rights granted to Hans Reiser to redistribute under other terms providing - * he accepts all liability including but not limited to patent, fitness - * for purpose, and direct or indirect claims arising from failure to perform. - * - * NO WARRANTY - */ - -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> -#include <linux/time.h> -#include <asm/uaccess.h> -#include "reiserfs.h" -#include "acl.h" -#include "xattr.h" -#include <linux/init.h> -#include <linux/blkdev.h> -#include <linux/buffer_head.h> -#include <linux/exportfs.h> -#include <linux/quotaops.h> -#include <linux/vfs.h> -#include <linux/mount.h> -#include <linux/namei.h> -#include <linux/crc32.h> -#include <linux/seq_file.h> - -struct file_system_type reiserfs_fs_type; - -static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING; -static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING; -static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING; - -int is_reiserfs_3_5(struct reiserfs_super_block *rs) -{ - return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string, - strlen(reiserfs_3_5_magic_string)); -} - -int is_reiserfs_3_6(struct reiserfs_super_block *rs) -{ - return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string, - strlen(reiserfs_3_6_magic_string)); -} - -int is_reiserfs_jr(struct reiserfs_super_block *rs) -{ - return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string, - strlen(reiserfs_jr_magic_string)); -} - -static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs) -{ - return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) || - is_reiserfs_jr(rs)); -} - -static int reiserfs_remount(struct super_block *s, int *flags, char *data); -static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf); -void show_alloc_options(struct seq_file *seq, struct super_block *s); - -static int reiserfs_sync_fs(struct super_block *s, int wait) -{ - struct reiserfs_transaction_handle th; - - reiserfs_write_lock(s); - if (!journal_begin(&th, s, 1)) - if (!journal_end_sync(&th, s, 1)) - reiserfs_flush_old_commits(s); - s->s_dirt = 0; /* Even if it's not true. - * We'll loop forever in sync_supers otherwise */ - reiserfs_write_unlock(s); - return 0; -} - -static void reiserfs_write_super(struct super_block *s) -{ - reiserfs_sync_fs(s, 1); -} - -static int reiserfs_freeze(struct super_block *s) -{ - struct reiserfs_transaction_handle th; - reiserfs_write_lock(s); - if (!(s->s_flags & MS_RDONLY)) { - int err = journal_begin(&th, s, 1); - if (err) { - reiserfs_block_writes(&th); - } else { - reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), - 1); - journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s)); - reiserfs_block_writes(&th); - journal_end_sync(&th, s, 1); - } - } - s->s_dirt = 0; - reiserfs_write_unlock(s); - return 0; -} - -static int reiserfs_unfreeze(struct super_block *s) -{ - reiserfs_allow_writes(s); - return 0; -} - -extern const struct in_core_key MAX_IN_CORE_KEY; - -/* this is used to delete "save link" when there are no items of a - file it points to. It can either happen if unlink is completed but - "save unlink" removal, or if file has both unlink and truncate - pending and as unlink completes first (because key of "save link" - protecting unlink is bigger that a key lf "save link" which - protects truncate), so there left no items to make truncate - completion on */ -static int remove_save_link_only(struct super_block *s, - struct reiserfs_key *key, int oid_free) -{ - struct reiserfs_transaction_handle th; - int err; - - /* we are going to do one balancing */ - err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT); - if (err) - return err; - - reiserfs_delete_solid_item(&th, NULL, key); - if (oid_free) - /* removals are protected by direct items */ - reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid)); - - return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT); -} - -#ifdef CONFIG_QUOTA -static int reiserfs_quota_on_mount(struct super_block *, int); -#endif - -/* look for uncompleted unlinks and truncates and complete them */ -static int finish_unfinished(struct super_block *s) -{ - INITIALIZE_PATH(path); - struct cpu_key max_cpu_key, obj_key; - struct reiserfs_key save_link_key, last_inode_key; - int retval = 0; - struct item_head *ih; - struct buffer_head *bh; - int item_pos; - char *item; - int done; - struct inode *inode; - int truncate; -#ifdef CONFIG_QUOTA - int i; - int ms_active_set; - int quota_enabled[MAXQUOTAS]; -#endif - - /* compose key to look for "save" links */ - max_cpu_key.version = KEY_FORMAT_3_5; - max_cpu_key.on_disk_key.k_dir_id = ~0U; - max_cpu_key.on_disk_key.k_objectid = ~0U; - set_cpu_key_k_offset(&max_cpu_key, ~0U); - max_cpu_key.key_length = 3; - - memset(&last_inode_key, 0, sizeof(last_inode_key)); - -#ifdef CONFIG_QUOTA - /* Needed for iput() to work correctly and not trash data */ - if (s->s_flags & MS_ACTIVE) { - ms_active_set = 0; - } else { - ms_active_set = 1; - s->s_flags |= MS_ACTIVE; - } - /* Turn on quotas so that they are updated correctly */ - for (i = 0; i < MAXQUOTAS; i++) { - quota_enabled[i] = 1; - if (REISERFS_SB(s)->s_qf_names[i]) { - int ret; - - if (sb_has_quota_active(s, i)) { - quota_enabled[i] = 0; - continue; - } - ret = reiserfs_quota_on_mount(s, i); - if (ret < 0) - reiserfs_warning(s, "reiserfs-2500", - "cannot turn on journaled " - "quota: error %d", ret); - } - } -#endif - - done = 0; - REISERFS_SB(s)->s_is_unlinked_ok = 1; - while (!retval) { - retval = search_item(s, &max_cpu_key, &path); - if (retval != ITEM_NOT_FOUND) { - reiserfs_error(s, "vs-2140", - "search_by_key returned %d", retval); - break; - } - - bh = get_last_bh(&path); - item_pos = get_item_pos(&path); - if (item_pos != B_NR_ITEMS(bh)) { - reiserfs_warning(s, "vs-2060", - "wrong position found"); - break; - } - item_pos--; - ih = B_N_PITEM_HEAD(bh, item_pos); - - if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID) - /* there are no "save" links anymore */ - break; - - save_link_key = ih->ih_key; - if (is_indirect_le_ih(ih)) - truncate = 1; - else - truncate = 0; - - /* reiserfs_iget needs k_dirid and k_objectid only */ - item = B_I_PITEM(bh, ih); - obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item); - obj_key.on_disk_key.k_objectid = - le32_to_cpu(ih->ih_key.k_objectid); - obj_key.on_disk_key.k_offset = 0; - obj_key.on_disk_key.k_type = 0; - - pathrelse(&path); - - inode = reiserfs_iget(s, &obj_key); - if (!inode) { - /* the unlink almost completed, it just did not manage to remove - "save" link and release objectid */ - reiserfs_warning(s, "vs-2180", "iget failed for %K", - &obj_key); - retval = remove_save_link_only(s, &save_link_key, 1); - continue; - } - - if (!truncate && inode->i_nlink) { - /* file is not unlinked */ - reiserfs_warning(s, "vs-2185", - "file %K is not unlinked", - &obj_key); - retval = remove_save_link_only(s, &save_link_key, 0); - continue; - } - dquot_initialize(inode); - - if (truncate && S_ISDIR(inode->i_mode)) { - /* We got a truncate request for a dir which is impossible. - The only imaginable way is to execute unfinished truncate request - then boot into old kernel, remove the file and create dir with - the same key. */ - reiserfs_warning(s, "green-2101", - "impossible truncate on a " - "directory %k. Please report", - INODE_PKEY(inode)); - retval = remove_save_link_only(s, &save_link_key, 0); - truncate = 0; - iput(inode); - continue; - } - - if (truncate) { - REISERFS_I(inode)->i_flags |= - i_link_saved_truncate_mask; - /* not completed truncate found. New size was committed together - with "save" link */ - reiserfs_info(s, "Truncating %k to %Ld ..", - INODE_PKEY(inode), inode->i_size); - reiserfs_truncate_file(inode, - 0 - /*don't update modification time */ - ); - retval = remove_save_link(inode, truncate); - } else { - REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; - /* not completed unlink (rmdir) found */ - reiserfs_info(s, "Removing %k..", INODE_PKEY(inode)); - if (memcmp(&last_inode_key, INODE_PKEY(inode), - sizeof(last_inode_key))){ - last_inode_key = *INODE_PKEY(inode); - /* removal gets completed in iput */ - retval = 0; - } else { - reiserfs_warning(s, "super-2189", "Dead loop " - "in finish_unfinished " - "detected, just remove " - "save link\n"); - retval = remove_save_link_only(s, - &save_link_key, 0); - } - } - - iput(inode); - printk("done\n"); - done++; - } - REISERFS_SB(s)->s_is_unlinked_ok = 0; - -#ifdef CONFIG_QUOTA - /* Turn quotas off */ - for (i = 0; i < MAXQUOTAS; i++) { - if (sb_dqopt(s)->files[i] && quota_enabled[i]) - dquot_quota_off(s, i); - } - if (ms_active_set) - /* Restore the flag back */ - s->s_flags &= ~MS_ACTIVE; -#endif - pathrelse(&path); - if (done) - reiserfs_info(s, "There were %d uncompleted unlinks/truncates. " - "Completed\n", done); - return retval; -} - -/* to protect file being unlinked from getting lost we "safe" link files - being unlinked. This link will be deleted in the same transaction with last - item of file. mounting the filesystem we scan all these links and remove - files which almost got lost */ -void add_save_link(struct reiserfs_transaction_handle *th, - struct inode *inode, int truncate) -{ - INITIALIZE_PATH(path); - int retval; - struct cpu_key key; - struct item_head ih; - __le32 link; - - BUG_ON(!th->t_trans_id); - - /* file can only get one "save link" of each kind */ - RFALSE(truncate && - (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask), - "saved link already exists for truncated inode %lx", - (long)inode->i_ino); - RFALSE(!truncate && - (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask), - "saved link already exists for unlinked inode %lx", - (long)inode->i_ino); - - /* setup key of "save" link */ - key.version = KEY_FORMAT_3_5; - key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID; - key.on_disk_key.k_objectid = inode->i_ino; - if (!truncate) { - /* unlink, rmdir, rename */ - set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize); - set_cpu_key_k_type(&key, TYPE_DIRECT); - - /* item head of "safe" link */ - make_le_item_head(&ih, &key, key.version, - 1 + inode->i_sb->s_blocksize, TYPE_DIRECT, - 4 /*length */ , 0xffff /*free space */ ); - } else { - /* truncate */ - if (S_ISDIR(inode->i_mode)) - reiserfs_warning(inode->i_sb, "green-2102", - "Adding a truncate savelink for " - "a directory %k! Please report", - INODE_PKEY(inode)); - set_cpu_key_k_offset(&key, 1); - set_cpu_key_k_type(&key, TYPE_INDIRECT); - - /* item head of "safe" link */ - make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT, - 4 /*length */ , 0 /*free space */ ); - } - key.key_length = 3; - - /* look for its place in the tree */ - retval = search_item(inode->i_sb, &key, &path); - if (retval != ITEM_NOT_FOUND) { - if (retval != -ENOSPC) - reiserfs_error(inode->i_sb, "vs-2100", - "search_by_key (%K) returned %d", &key, - retval); - pathrelse(&path); - return; - } - - /* body of "save" link */ - link = INODE_PKEY(inode)->k_dir_id; - - /* put "save" link into tree, don't charge quota to anyone */ - retval = - reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link); - if (retval) { - if (retval != -ENOSPC) - reiserfs_error(inode->i_sb, "vs-2120", - "insert_item returned %d", retval); - } else { - if (truncate) - REISERFS_I(inode)->i_flags |= - i_link_saved_truncate_mask; - else - REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask; - } -} - -/* this opens transaction unlike add_save_link */ -int remove_save_link(struct inode *inode, int truncate) -{ - struct reiserfs_transaction_handle th; - struct reiserfs_key key; - int err; - - /* we are going to do one balancing only */ - err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); - if (err) - return err; - - /* setup key of "save" link */ - key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID); - key.k_objectid = INODE_PKEY(inode)->k_objectid; - if (!truncate) { - /* unlink, rmdir, rename */ - set_le_key_k_offset(KEY_FORMAT_3_5, &key, - 1 + inode->i_sb->s_blocksize); - set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT); - } else { - /* truncate */ - set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1); - set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT); - } - - if ((truncate && - (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) || - (!truncate && - (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask))) - /* don't take quota bytes from anywhere */ - reiserfs_delete_solid_item(&th, NULL, &key); - if (!truncate) { - reiserfs_release_objectid(&th, inode->i_ino); - REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask; - } else - REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask; - - return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT); -} - -static void reiserfs_kill_sb(struct super_block *s) -{ - if (REISERFS_SB(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); - - if (s->s_dirt) - reiserfs_write_super(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, s, 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_proc_info_done(s); - - reiserfs_write_unlock(s); - mutex_destroy(&REISERFS_SB(s)->lock); - 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); - 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_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) -{ - 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; - int lock_depth; - - 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; - } - lock_depth = reiserfs_write_lock_once(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, inode->i_sb, 1); - -out: - reiserfs_write_unlock_once(inode->i_sb, lock_depth); -} - -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); -#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, - .write_super = reiserfs_write_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, -#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_info = dquot_get_dqinfo, - .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; - int setmask; /* bitmask which is to set on mount_options bitmask when this - value is found, 0 is no bits are to be changed. */ - int clrmask; /* 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 */ -} 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; - int arg_required; /* 0 if argument is not required, not 0 otherwise */ - const arg_desc_t *values; /* list of values accepted by an option */ - int setmask; /* bitmask which is to set on mount_options bitmask when this - value is found, 0 is no bits are to be changed. */ - int clrmask; /* 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 */ -} 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, char *options, /* string given via mount's -o */ - unsigned long *mount_options, - /* after the parsing phase, contains the - collection of bitflags defining what - mount options were selected. */ - unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */ - 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) { - if (*jdev_name) { //Hm, already assigned? - 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] = - kmalloc(strlen(arg) + 1, GFP_KERNEL); - if (!qf_names[qtype]) { - reiserfs_warning(s, "reiserfs-2502", - "not enough memory " - "for storing " - "quotafile name."); - return 0; - } - strcpy(qf_names[qtype], arg); - 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 < 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[MAXQUOTAS]; - unsigned int qfmt = 0; -#ifdef CONFIG_QUOTA - int i; -#endif - - 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 < MAXQUOTAS; i++) - if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i]) - kfree(qf_names[i]); -#endif - err = -EINVAL; - goto out_err; - } -#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; - } - - if (*mount_flags & MS_RDONLY) { - reiserfs_xattr_init(s, *mount_flags); - /* remount read-only */ - if (s->s_flags & MS_RDONLY) - /* it is read-only already */ - goto out_ok; - - 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; - } - - err = journal_begin(&th, s, 10); - if (err) - goto out_err; - - /* 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, s, SB_BUFFER_WITH_SB(s)); - } else { - /* remount read-write */ - if (!(s->s_flags & MS_RDONLY)) { - reiserfs_xattr_init(s, *mount_flags); - goto out_ok; /* We are read-write already */ - } - - if (reiserfs_is_journal_aborted(journal)) { - err = journal->j_errno; - goto out_err; - } - - handle_data_mode(s, mount_options); - handle_barrier_mode(s, mount_options); - REISERFS_SB(s)->s_mount_state = sb_umount_state(rs); - s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */ - err = journal_begin(&th, s, 10); - if (err) - goto out_err; - - /* 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, s, 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, s, 10); - if (err) - goto out_err; - s->s_dirt = 0; - - if (!(*mount_flags & MS_RDONLY)) { - dquot_resume(s, -1); - finish_unfinished(s); - reiserfs_xattr_init(s, *mount_flags); - } - -out_ok: - replace_mount_options(s, new_opts); - reiserfs_write_unlock(s); - return 0; - -out_err: - kfree(new_opts); - reiserfs_write_unlock(s); - 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)", - reiserfs_bdevname(s), 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)", - reiserfs_bdevname(s), 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 %Lu, size %lu)", - reiserfs_bdevname(s), - (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; - - if (is_reiserfs_jr(rs)) { - /* magic is of non-standard journal filesystem, look at s_version to - find which format is in use */ - 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; -#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 -// bith 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; - __u32 hash = DEFAULT_HASH; - - inode = s->s_root->d_inode; - - do { // Some serious "goto"-hater was there ;) - u32 teahash, r5hash, yurahash; - - 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); - if (deh_offset(&(de.de_deh[de.de_entry_num])) == 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"); - break; - } - 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) - && - (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) - == r5hash)) || ((teahash == yurahash) - && (yurahash == - GET_HASH_VALUE(deh_offset - (& - (de. - de_deh[de. - de_entry_num]))))) - || ((r5hash == yurahash) - && (yurahash == - GET_HASH_VALUE(deh_offset - (&(de.de_deh[de.de_entry_num])))))) { - reiserfs_warning(s, "reiserfs-2506", "Unable to " - "automatically detect hash function. " - "Please mount with -o " - "hash={tea,rupasov,r5}"); - hash = UNSET_HASH; - break; - } - if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) == - yurahash) - hash = YURA_HASH; - else if (GET_HASH_VALUE - (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) - hash = TEA_HASH; - else if (GET_HASH_VALUE - (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) - hash = R5_HASH; - else { - reiserfs_warning(s, "reiserfs-2506", - "Unrecognised hash function"); - hash = UNSET_HASH; - } - } while (0); - - 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[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 */ - REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL); - REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO); - REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH); - /* no preallocation minimum, be smart in - reiserfs_file_write instead */ - REISERFS_SB(s)->s_alloc_options.preallocmin = 0; - /* Preallocate by 16 blocks (17-1) at once */ - REISERFS_SB(s)->s_alloc_options.preallocsize = 17; - /* setup default block allocator options */ - reiserfs_init_alloc_options(s); - - mutex_init(&REISERFS_SB(s)->lock); - REISERFS_SB(s)->lock_depth = -1; - - 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]) { - REISERFS_SB(s)->s_jdev = kstrdup(jdev_name, GFP_KERNEL); - if (!REISERFS_SB(s)->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", - reiserfs_bdevname(s)); - 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)) { - REISERFS_SB(s)->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"); - } - - // set_device_ro(s->s_dev, 1) ; - 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 { - jinit_done = 1; /* once this is set, journal_release must be called - ** if we error out of the mount - */ - } - - 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, s, SB_BUFFER_WITH_SB(s)); - errval = journal_end(&th, s, 1); - if (errval) { - dput(s->s_root); - s->s_root = NULL; - goto error; - } - - if ((errval = reiserfs_lookup_privroot(s)) || - (errval = reiserfs_xattr_init(s, s->s_flags))) { - dput(s->s_root); - s->s_root = NULL; - goto error; - } - - /* 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"); - } - - if ((errval = reiserfs_lookup_privroot(s)) || - (errval = reiserfs_xattr_init(s, s->s_flags))) { - dput(s->s_root); - s->s_root = NULL; - goto error; - } - } - // 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); - } - - 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 < 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; - - reiserfs_write_lock(dquot->dq_sb); - ret = - journal_begin(&th, dquot->dq_sb, - REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); - if (ret) - goto out; - ret = dquot_commit(dquot); - err = - journal_end(&th, dquot->dq_sb, - REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); - 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; - - reiserfs_write_lock(dquot->dq_sb); - ret = - journal_begin(&th, dquot->dq_sb, - REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); - if (ret) - goto out; - ret = dquot_acquire(dquot); - err = - journal_end(&th, dquot->dq_sb, - REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); - 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)); - if (ret) { - /* Release dquot anyway to avoid endless cycle in dqput() */ - dquot_release(dquot); - goto out; - } - ret = dquot_release(dquot); - err = - journal_end(&th, dquot->dq_sb, - REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); - if (!ret && err) - ret = err; - out: - reiserfs_write_unlock(dquot->dq_sb); - 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; - - /* Data block + inode block */ - reiserfs_write_lock(sb); - ret = journal_begin(&th, sb, 2); - if (ret) - goto out; - ret = dquot_commit_info(sb, type); - err = journal_end(&th, sb, 2); - 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; - - if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) - return -EINVAL; - - /* Quotafile not on the same filesystem? */ - if (path->dentry->d_sb != sb) { - err = -EXDEV; - goto out; - } - inode = path->dentry->d_inode; - /* 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, sb, 1); - if (err) - goto out; - } - err = dquot_quota_on(sb, type, format_id, path); -out: - 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=%Lu, len=%Lu)" - " cancelled because transaction is not started.\n", - (unsigned long long)off, (unsigned long long)len); - return -EIO; - } - mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); - while (towrite > 0) { - tocopy = sb->s_blocksize - offset < towrite ? - sb->s_blocksize - offset : towrite; - tmp_bh.b_state = 0; - err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); - 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_prepare_for_journal(sb, bh, 1); - journal_mark_dirty(current->journal_info, sb, bh); - if (!journal_quota) - reiserfs_add_ordered_list(inode, bh); - brelse(bh); - offset = 0; - towrite -= tocopy; - data += tocopy; - blk++; - } -out: - if (len == towrite) { - mutex_unlock(&inode->i_mutex); - 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); - mutex_unlock(&inode->i_mutex); - 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; - - if ((ret = init_inodecache())) { - return ret; - } - - reiserfs_proc_info_global_init(); - - ret = register_filesystem(&reiserfs_fs_type); - - if (ret == 0) { - return 0; - } - - 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_DESCRIPTION("ReiserFS journaled filesystem"); -MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>"); -MODULE_LICENSE("GPL"); - -module_init(init_reiserfs_fs); -module_exit(exit_reiserfs_fs); |