forked from Minki/linux
2149 lines
66 KiB
C
2149 lines
66 KiB
C
|
/*
|
||
|
* 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/config.h>
|
||
|
#include <linux/module.h>
|
||
|
#include <linux/vmalloc.h>
|
||
|
#include <linux/time.h>
|
||
|
#include <asm/uaccess.h>
|
||
|
#include <linux/reiserfs_fs.h>
|
||
|
#include <linux/reiserfs_acl.h>
|
||
|
#include <linux/reiserfs_xattr.h>
|
||
|
#include <linux/smp_lock.h>
|
||
|
#include <linux/init.h>
|
||
|
#include <linux/blkdev.h>
|
||
|
#include <linux/buffer_head.h>
|
||
|
#include <linux/vfs.h>
|
||
|
#include <linux/namespace.h>
|
||
|
#include <linux/mount.h>
|
||
|
#include <linux/namei.h>
|
||
|
#include <linux/quotaops.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 super_block * s, struct kstatfs * buf);
|
||
|
|
||
|
static int reiserfs_sync_fs (struct super_block * s, int wait)
|
||
|
{
|
||
|
if (!(s->s_flags & MS_RDONLY)) {
|
||
|
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);
|
||
|
} else {
|
||
|
s->s_dirt = 0;
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void reiserfs_write_super(struct super_block *s)
|
||
|
{
|
||
|
reiserfs_sync_fs(s, 1);
|
||
|
}
|
||
|
|
||
|
static void reiserfs_write_super_lockfs (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);
|
||
|
}
|
||
|
|
||
|
static void reiserfs_unlockfs(struct super_block *s) {
|
||
|
reiserfs_allow_writes(s) ;
|
||
|
}
|
||
|
|
||
|
extern const struct reiserfs_key MAX_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;
|
||
|
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;
|
||
|
#endif
|
||
|
|
||
|
|
||
|
/* compose key to look for "save" links */
|
||
|
max_cpu_key.version = KEY_FORMAT_3_5;
|
||
|
max_cpu_key.on_disk_key = MAX_KEY;
|
||
|
max_cpu_key.key_length = 3;
|
||
|
|
||
|
#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++) {
|
||
|
if (REISERFS_SB(s)->s_qf_names[i]) {
|
||
|
int ret = reiserfs_quota_on_mount(s, i);
|
||
|
if (ret < 0)
|
||
|
reiserfs_warning(s, "reiserfs: cannot turn on journalled 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_warning (s, "vs-2140: finish_unfinished: 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: finish_unfinished: 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 (*(__u32 *)item);
|
||
|
obj_key.on_disk_key.k_objectid = le32_to_cpu (ih->ih_key.k_objectid);
|
||
|
obj_key.on_disk_key.u.k_offset_v1.k_offset = 0;
|
||
|
obj_key.on_disk_key.u.k_offset_v1.k_uniqueness = 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: finish_unfinished: 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: finish_unfinished: file %K is not unlinked",
|
||
|
&obj_key);
|
||
|
retval = remove_save_link_only (s, &save_link_key, 0);
|
||
|
continue;
|
||
|
}
|
||
|
DQUOT_INIT(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));
|
||
|
/* removal gets completed in iput */
|
||
|
retval = 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])
|
||
|
vfs_quota_off_mount(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 filesytem 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;
|
||
|
__u32 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_warning (inode->i_sb, "vs-2100: add_save_link:"
|
||
|
"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 inot tree, don't charge quota to anyone */
|
||
|
retval = reiserfs_insert_item (th, &path, &key, &ih, NULL, (char *)&link);
|
||
|
if (retval) {
|
||
|
if (retval != -ENOSPC)
|
||
|
reiserfs_warning (inode->i_sb, "vs-2120: add_save_link: 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_put_super (struct super_block * s)
|
||
|
{
|
||
|
int i;
|
||
|
struct reiserfs_transaction_handle th ;
|
||
|
th.t_trans_id = 0;
|
||
|
|
||
|
if (REISERFS_SB(s)->xattr_root) {
|
||
|
d_invalidate (REISERFS_SB(s)->xattr_root);
|
||
|
dput (REISERFS_SB(s)->xattr_root);
|
||
|
}
|
||
|
|
||
|
if (REISERFS_SB(s)->priv_root) {
|
||
|
d_invalidate (REISERFS_SB(s)->priv_root);
|
||
|
dput (REISERFS_SB(s)->priv_root);
|
||
|
}
|
||
|
|
||
|
/* 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) ;
|
||
|
|
||
|
for (i = 0; i < SB_BMAP_NR (s); i ++)
|
||
|
brelse (SB_AP_BITMAP (s)[i].bh);
|
||
|
|
||
|
vfree (SB_AP_BITMAP (s));
|
||
|
|
||
|
brelse (SB_BUFFER_WITH_SB (s));
|
||
|
|
||
|
print_statistics (s);
|
||
|
|
||
|
if (REISERFS_SB(s)->s_kmallocs != 0) {
|
||
|
reiserfs_warning (s, "vs-2004: reiserfs_put_super: allocated memory left %d",
|
||
|
REISERFS_SB(s)->s_kmallocs);
|
||
|
}
|
||
|
|
||
|
if (REISERFS_SB(s)->reserved_blocks != 0) {
|
||
|
reiserfs_warning (s, "green-2005: reiserfs_put_super: reserved blocks left %d",
|
||
|
REISERFS_SB(s)->reserved_blocks);
|
||
|
}
|
||
|
|
||
|
reiserfs_proc_info_done( s );
|
||
|
|
||
|
kfree(s->s_fs_info);
|
||
|
s->s_fs_info = NULL;
|
||
|
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static kmem_cache_t * 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, SLAB_KERNEL);
|
||
|
if (!ei)
|
||
|
return NULL;
|
||
|
return &ei->vfs_inode;
|
||
|
}
|
||
|
|
||
|
static void reiserfs_destroy_inode(struct inode *inode)
|
||
|
{
|
||
|
kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
|
||
|
}
|
||
|
|
||
|
static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
|
||
|
{
|
||
|
struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *) foo;
|
||
|
|
||
|
if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
|
||
|
SLAB_CTOR_CONSTRUCTOR) {
|
||
|
INIT_LIST_HEAD(&ei->i_prealloc_list) ;
|
||
|
inode_init_once(&ei->vfs_inode);
|
||
|
ei->i_acl_access = NULL;
|
||
|
ei->i_acl_default = NULL;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static int init_inodecache(void)
|
||
|
{
|
||
|
reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
|
||
|
sizeof(struct reiserfs_inode_info),
|
||
|
0, SLAB_RECLAIM_ACCOUNT,
|
||
|
init_once, NULL);
|
||
|
if (reiserfs_inode_cachep == NULL)
|
||
|
return -ENOMEM;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void destroy_inodecache(void)
|
||
|
{
|
||
|
if (kmem_cache_destroy(reiserfs_inode_cachep))
|
||
|
reiserfs_warning (NULL, "reiserfs_inode_cache: not all structures were freed");
|
||
|
}
|
||
|
|
||
|
/* we don't mark inodes dirty, we just log them */
|
||
|
static void reiserfs_dirty_inode (struct inode * inode) {
|
||
|
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) {
|
||
|
reiserfs_write_unlock (inode->i_sb);
|
||
|
return;
|
||
|
}
|
||
|
reiserfs_update_sd (&th, inode);
|
||
|
journal_end(&th, inode->i_sb, 1) ;
|
||
|
reiserfs_write_unlock(inode->i_sb);
|
||
|
}
|
||
|
|
||
|
static void reiserfs_clear_inode (struct inode *inode)
|
||
|
{
|
||
|
struct posix_acl *acl;
|
||
|
|
||
|
acl = REISERFS_I(inode)->i_acl_access;
|
||
|
if (acl && !IS_ERR (acl))
|
||
|
posix_acl_release (acl);
|
||
|
REISERFS_I(inode)->i_acl_access = NULL;
|
||
|
|
||
|
acl = REISERFS_I(inode)->i_acl_default;
|
||
|
if (acl && !IS_ERR (acl))
|
||
|
posix_acl_release (acl);
|
||
|
REISERFS_I(inode)->i_acl_default = NULL;
|
||
|
}
|
||
|
|
||
|
#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 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,
|
||
|
.delete_inode = reiserfs_delete_inode,
|
||
|
.clear_inode = reiserfs_clear_inode,
|
||
|
.put_super = reiserfs_put_super,
|
||
|
.write_super = reiserfs_write_super,
|
||
|
.sync_fs = reiserfs_sync_fs,
|
||
|
.write_super_lockfs = reiserfs_write_super_lockfs,
|
||
|
.unlockfs = reiserfs_unlockfs,
|
||
|
.statfs = reiserfs_statfs,
|
||
|
.remount_fs = reiserfs_remount,
|
||
|
#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_dquot_initialize(struct inode *, int);
|
||
|
static int reiserfs_dquot_drop(struct inode *);
|
||
|
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, char *);
|
||
|
|
||
|
static struct dquot_operations reiserfs_quota_operations =
|
||
|
{
|
||
|
.initialize = reiserfs_dquot_initialize,
|
||
|
.drop = reiserfs_dquot_drop,
|
||
|
.alloc_space = dquot_alloc_space,
|
||
|
.alloc_inode = dquot_alloc_inode,
|
||
|
.free_space = dquot_free_space,
|
||
|
.free_inode = dquot_free_inode,
|
||
|
.transfer = dquot_transfer,
|
||
|
.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,
|
||
|
};
|
||
|
|
||
|
static struct quotactl_ops reiserfs_qctl_operations =
|
||
|
{
|
||
|
.quota_on = reiserfs_quota_on,
|
||
|
.quota_off = vfs_quota_off,
|
||
|
.quota_sync = vfs_quota_sync,
|
||
|
.get_info = vfs_get_dqinfo,
|
||
|
.set_info = vfs_set_dqinfo,
|
||
|
.get_dqblk = vfs_get_dqblk,
|
||
|
.set_dqblk = vfs_set_dqblk,
|
||
|
};
|
||
|
#endif
|
||
|
|
||
|
static struct export_operations reiserfs_export_ops = {
|
||
|
.encode_fh = reiserfs_encode_fh,
|
||
|
.decode_fh = reiserfs_decode_fh,
|
||
|
.get_parent = reiserfs_get_parent,
|
||
|
.get_dentry = reiserfs_get_dentry,
|
||
|
} ;
|
||
|
|
||
|
/* 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)},
|
||
|
{NULL, 0}
|
||
|
};
|
||
|
|
||
|
/* 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},
|
||
|
{NULL, 0}
|
||
|
};
|
||
|
|
||
|
/* 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},
|
||
|
};
|
||
|
|
||
|
int reiserfs_default_io_size = 128 * 1024; /* Default recommended I/O size is 128k.
|
||
|
There might be broken applications that are
|
||
|
confused by this. Use nolargeio mount option
|
||
|
to get usual i/o size = PAGE_SIZE.
|
||
|
*/
|
||
|
|
||
|
/* 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, "%s not supported.", p);
|
||
|
else
|
||
|
*bit_flags &= ~opt->clrmask;
|
||
|
if (opt->setmask == (1 << REISERFS_UNSUPPORTED_OPT))
|
||
|
reiserfs_warning (s, "%s not supported.", p);
|
||
|
else
|
||
|
*bit_flags |= opt->setmask;
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
if (!opt->option_name) {
|
||
|
reiserfs_warning (s, "unknown mount option \"%s\"", p);
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
p += strlen (opt->option_name);
|
||
|
switch (*p) {
|
||
|
case '=':
|
||
|
if (!opt->arg_required) {
|
||
|
reiserfs_warning (s, "the option \"%s\" does not require an argument",
|
||
|
opt->option_name);
|
||
|
return -1;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case 0:
|
||
|
if (opt->arg_required) {
|
||
|
reiserfs_warning (s, "the option \"%s\" requires an argument", opt->option_name);
|
||
|
return -1;
|
||
|
}
|
||
|
break;
|
||
|
default:
|
||
|
reiserfs_warning (s, "head of option \"%s\" is only correct", 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, "empty argument for \"%s\"", 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, "bad value \"%s\" for option \"%s\"", 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)
|
||
|
{
|
||
|
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},
|
||
|
#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
|
||
|
{"nolog",}, /* This is unsupported */
|
||
|
{"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",},
|
||
|
{"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},
|
||
|
{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" */
|
||
|
*blocks = simple_strtoul (arg, &p, 0);
|
||
|
if (*p != '\0') {
|
||
|
/* NNN does not look like a number */
|
||
|
reiserfs_warning (s, "reiserfs_parse_options: bad value %s", 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, "reiserfs_parse_options: bad value %s", arg); return 0;
|
||
|
}
|
||
|
*commit_max_age = (unsigned int)val;
|
||
|
}
|
||
|
|
||
|
if ( c == 'w' ) {
|
||
|
char *p=NULL;
|
||
|
int val = simple_strtoul (arg, &p, 0);
|
||
|
|
||
|
if ( *p != '\0') {
|
||
|
reiserfs_warning (s, "reiserfs_parse_options: non-numeric value %s for nolargeio option", arg);
|
||
|
return 0;
|
||
|
}
|
||
|
if ( val )
|
||
|
reiserfs_default_io_size = PAGE_SIZE;
|
||
|
else
|
||
|
reiserfs_default_io_size = 128 * 1024;
|
||
|
}
|
||
|
|
||
|
if (c == 'j') {
|
||
|
if (arg && *arg && jdev_name) {
|
||
|
if ( *jdev_name ) { //Hm, already assigned?
|
||
|
reiserfs_warning (s, "reiserfs_parse_options: 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_enabled(s)) {
|
||
|
reiserfs_warning(s, "reiserfs_parse_options: cannot change journalled 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, "reiserfs_parse_options: %s quota file already specified.", QTYPE2NAME(qtype));
|
||
|
return 0;
|
||
|
}
|
||
|
if (strchr(arg, '/')) {
|
||
|
reiserfs_warning(s, "reiserfs_parse_options: quotafile must be on filesystem root.");
|
||
|
return 0;
|
||
|
}
|
||
|
REISERFS_SB(s)->s_qf_names[qtype] = kmalloc(strlen(arg)+1, GFP_KERNEL);
|
||
|
if (!REISERFS_SB(s)->s_qf_names[qtype]) {
|
||
|
reiserfs_warning(s, "reiserfs_parse_options: not enough memory for storing quotafile name.");
|
||
|
return 0;
|
||
|
}
|
||
|
strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
|
||
|
}
|
||
|
else {
|
||
|
if (REISERFS_SB(s)->s_qf_names[qtype]) {
|
||
|
kfree(REISERFS_SB(s)->s_qf_names[qtype]);
|
||
|
REISERFS_SB(s)->s_qf_names[qtype] = NULL;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
if (c == 'f') {
|
||
|
if (!strcmp(arg, "vfsold"))
|
||
|
REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
|
||
|
else if (!strcmp(arg, "vfsv0"))
|
||
|
REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
|
||
|
else {
|
||
|
reiserfs_warning(s, "reiserfs_parse_options: unknown quota format specified.");
|
||
|
return 0;
|
||
|
}
|
||
|
}
|
||
|
#else
|
||
|
if (c == 'u' || c == 'g' || c == 'f') {
|
||
|
reiserfs_warning(s, "reiserfs_parse_options: journalled quota options not supported.");
|
||
|
return 0;
|
||
|
}
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
#ifdef CONFIG_QUOTA
|
||
|
if (!REISERFS_SB(s)->s_jquota_fmt && (REISERFS_SB(s)->s_qf_names[USRQUOTA] || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
|
||
|
reiserfs_warning(s, "reiserfs_parse_options: journalled quota format not specified.");
|
||
|
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;
|
||
|
|
||
|
if( reiserfs_attrs( s ) ) {
|
||
|
rs = SB_DISK_SUPER_BLOCK (s);
|
||
|
if( old_format_only(s) ) {
|
||
|
reiserfs_warning(s, "reiserfs: 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, "reiserfs: cannot support attributes until flag is set in super-block" );
|
||
|
REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS );
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static int reiserfs_remount (struct super_block * s, int * mount_flags, char * arg)
|
||
|
{
|
||
|
struct reiserfs_super_block * rs;
|
||
|
struct reiserfs_transaction_handle th ;
|
||
|
unsigned long blocks;
|
||
|
unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
|
||
|
unsigned long safe_mask = 0;
|
||
|
unsigned int commit_max_age = (unsigned int)-1;
|
||
|
struct reiserfs_journal *journal = SB_JOURNAL(s);
|
||
|
int err;
|
||
|
#ifdef CONFIG_QUOTA
|
||
|
int i;
|
||
|
#endif
|
||
|
|
||
|
rs = SB_DISK_SUPER_BLOCK (s);
|
||
|
|
||
|
if (!reiserfs_parse_options(s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
|
||
|
#ifdef CONFIG_QUOTA
|
||
|
for (i = 0; i < MAXQUOTAS; i++)
|
||
|
if (REISERFS_SB(s)->s_qf_names[i]) {
|
||
|
kfree(REISERFS_SB(s)->s_qf_names[i]);
|
||
|
REISERFS_SB(s)->s_qf_names[i] = NULL;
|
||
|
}
|
||
|
#endif
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
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;
|
||
|
|
||
|
/* 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) {
|
||
|
int rc = reiserfs_resize(s, blocks);
|
||
|
if (rc != 0)
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
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 */
|
||
|
return 0;
|
||
|
/* 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) {
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
err = journal_begin(&th, s, 10) ;
|
||
|
if (err)
|
||
|
return 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);
|
||
|
return 0; /* We are read-write already */
|
||
|
}
|
||
|
|
||
|
if (reiserfs_is_journal_aborted (journal))
|
||
|
return journal->j_errno;
|
||
|
|
||
|
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)
|
||
|
return 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 );
|
||
|
/* 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)
|
||
|
return err;
|
||
|
s->s_dirt = 0;
|
||
|
|
||
|
if (!( *mount_flags & MS_RDONLY ) ) {
|
||
|
finish_unfinished( s );
|
||
|
reiserfs_xattr_init (s, *mount_flags);
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk.
|
||
|
* @sb - superblock for this filesystem
|
||
|
* @bi - the bitmap info to be loaded. Requires that bi->bh is valid.
|
||
|
*
|
||
|
* This routine counts how many free bits there are, finding the first zero
|
||
|
* as a side effect. Could also be implemented as a loop of test_bit() calls, or
|
||
|
* a loop of find_first_zero_bit() calls. This implementation is similar to
|
||
|
* find_first_zero_bit(), but doesn't return after it finds the first bit.
|
||
|
* Should only be called on fs mount, but should be fairly efficient anyways.
|
||
|
*
|
||
|
* bi->first_zero_hint is considered unset if it == 0, since the bitmap itself
|
||
|
* will * invariably occupt block 0 represented in the bitmap. The only
|
||
|
* exception to this is when free_count also == 0, since there will be no
|
||
|
* free blocks at all.
|
||
|
*/
|
||
|
|
||
|
static void load_bitmap_info_data (struct super_block *sb,
|
||
|
struct reiserfs_bitmap_info *bi)
|
||
|
{
|
||
|
unsigned long *cur = (unsigned long *)bi->bh->b_data;
|
||
|
|
||
|
while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) {
|
||
|
|
||
|
/* No need to scan if all 0's or all 1's.
|
||
|
* Since we're only counting 0's, we can simply ignore all 1's */
|
||
|
if (*cur == 0) {
|
||
|
if (bi->first_zero_hint == 0) {
|
||
|
bi->first_zero_hint = ((char *)cur - bi->bh->b_data) << 3;
|
||
|
}
|
||
|
bi->free_count += sizeof(unsigned long)*8;
|
||
|
} else if (*cur != ~0L) {
|
||
|
int b;
|
||
|
for (b = 0; b < sizeof(unsigned long)*8; b++) {
|
||
|
if (!reiserfs_test_le_bit (b, cur)) {
|
||
|
bi->free_count ++;
|
||
|
if (bi->first_zero_hint == 0)
|
||
|
bi->first_zero_hint =
|
||
|
(((char *)cur - bi->bh->b_data) << 3) + b;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
cur ++;
|
||
|
}
|
||
|
|
||
|
#ifdef CONFIG_REISERFS_CHECK
|
||
|
// This outputs a lot of unneded info on big FSes
|
||
|
// reiserfs_warning ("bitmap loaded from block %d: %d free blocks",
|
||
|
// bi->bh->b_blocknr, bi->free_count);
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
static int read_bitmaps (struct super_block * s)
|
||
|
{
|
||
|
int i, bmap_nr;
|
||
|
|
||
|
SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
|
||
|
if (SB_AP_BITMAP (s) == 0)
|
||
|
return 1;
|
||
|
memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
|
||
|
for (i = 0, bmap_nr = REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1;
|
||
|
i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) {
|
||
|
SB_AP_BITMAP (s)[i].bh = sb_getblk(s, bmap_nr);
|
||
|
if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
|
||
|
ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);
|
||
|
}
|
||
|
for (i = 0; i < SB_BMAP_NR(s); i++) {
|
||
|
wait_on_buffer(SB_AP_BITMAP (s)[i].bh);
|
||
|
if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
|
||
|
reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: "
|
||
|
"bitmap block (#%lu) reading failed",
|
||
|
SB_AP_BITMAP(s)[i].bh->b_blocknr);
|
||
|
for (i = 0; i < SB_BMAP_NR(s); i++)
|
||
|
brelse(SB_AP_BITMAP(s)[i].bh);
|
||
|
vfree(SB_AP_BITMAP(s));
|
||
|
SB_AP_BITMAP(s) = NULL;
|
||
|
return 1;
|
||
|
}
|
||
|
load_bitmap_info_data (s, SB_AP_BITMAP (s) + i);
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int read_old_bitmaps (struct super_block * s)
|
||
|
{
|
||
|
int i ;
|
||
|
struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK(s);
|
||
|
int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1; /* first of bitmap blocks */
|
||
|
|
||
|
/* read true bitmap */
|
||
|
SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
|
||
|
if (SB_AP_BITMAP (s) == 0)
|
||
|
return 1;
|
||
|
|
||
|
memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
|
||
|
|
||
|
for (i = 0; i < sb_bmap_nr(rs); i ++) {
|
||
|
SB_AP_BITMAP (s)[i].bh = sb_bread (s, bmp1 + i);
|
||
|
if (!SB_AP_BITMAP (s)[i].bh)
|
||
|
return 1;
|
||
|
load_bitmap_info_data (s, SB_AP_BITMAP (s) + i);
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
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: read_super_block: "
|
||
|
"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: read_super_block: "
|
||
|
"bread failed (dev %s, block %lu, size %lu)\n",
|
||
|
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: read_super_block: "
|
||
|
"can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
|
||
|
reiserfs_bdevname (s), (unsigned long long)bh->b_blocknr, s->s_blocksize);
|
||
|
brelse (bh);
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
if ( rs->s_v1.s_root_block == -1 ) {
|
||
|
brelse(bh) ;
|
||
|
reiserfs_warning (s, "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_warning (s, "read_super_block: found reiserfs format \"3.6\""
|
||
|
" with non-standard journal");
|
||
|
else if (sb_version(rs) == REISERFS_VERSION_1)
|
||
|
reiserfs_warning (s, "read_super_block: found reiserfs format \"3.5\""
|
||
|
" with non-standard journal");
|
||
|
else {
|
||
|
reiserfs_warning (s, "sh-2012: read_super_block: 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) {
|
||
|
int i ;
|
||
|
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, "reread_meta_blocks, error reading the super") ;
|
||
|
return 1 ;
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < SB_BMAP_NR(s) ; i++) {
|
||
|
ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh)) ;
|
||
|
wait_on_buffer(SB_AP_BITMAP(s)[i].bh) ;
|
||
|
if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
|
||
|
reiserfs_warning (s, "reread_meta_blocks, error reading bitmap block number %d at %llu",
|
||
|
i, (unsigned long long)SB_AP_BITMAP(s)[i].bh->b_blocknr) ;
|
||
|
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_warning(s,"FS seems to be empty, autodetect "
|
||
|
"is using the default hash");
|
||
|
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,"Unable to automatically detect hash function. "
|
||
|
"Please mount with -o hash={tea,rupasov,r5}",
|
||
|
reiserfs_bdevname (s));
|
||
|
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,"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, "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, "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, "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, ...) \
|
||
|
if (!(silent)) \
|
||
|
reiserfs_warning (s, __VA_ARGS__)
|
||
|
|
||
|
static int reiserfs_fill_super (struct super_block * s, void * data, int silent)
|
||
|
{
|
||
|
struct inode *root_inode;
|
||
|
int j;
|
||
|
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;
|
||
|
|
||
|
sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
|
||
|
if (!sbi) {
|
||
|
errval = -ENOMEM;
|
||
|
goto error;
|
||
|
}
|
||
|
s->s_fs_info = sbi;
|
||
|
memset (sbi, 0, sizeof (struct reiserfs_sb_info));
|
||
|
/* 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);
|
||
|
/* 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;
|
||
|
/* Initialize the rwsem for xattr dir */
|
||
|
init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
|
||
|
|
||
|
/* setup default block allocator options */
|
||
|
reiserfs_init_alloc_options(s);
|
||
|
|
||
|
jdev_name = NULL;
|
||
|
if (reiserfs_parse_options (s, (char *) data, &(sbi->s_mount_opt), &blocks, &jdev_name, &commit_max_age) == 0) {
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
if (blocks) {
|
||
|
SWARN (silent, s, "jmacd-7: reiserfs_fill_super: resize option "
|
||
|
"for remount only");
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
/* 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: reiserfs_fill_super: can not find reiserfs on %s", reiserfs_bdevname (s));
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
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 on %s cannot be mounted because it is bigger than the device", reiserfs_bdevname(s));
|
||
|
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;
|
||
|
}
|
||
|
|
||
|
sbi->s_mount_state = SB_REISERFS_STATE(s);
|
||
|
sbi->s_mount_state = REISERFS_VALID_FS ;
|
||
|
|
||
|
if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) {
|
||
|
SWARN(silent, s, "jmacd-8: reiserfs_fill_super: unable to read bitmap");
|
||
|
goto error;
|
||
|
}
|
||
|
#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: reiserfs_fill_super: unable to initialize journal space") ;
|
||
|
goto error ;
|
||
|
} 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: reiserfs_fill_super: unable to reread meta blocks after journal init") ;
|
||
|
goto error ;
|
||
|
}
|
||
|
|
||
|
if (replay_only (s))
|
||
|
goto error;
|
||
|
|
||
|
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: reiserfs_fill_super: get root inode failed");
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
if (root_inode->i_state & I_NEW) {
|
||
|
reiserfs_read_locked_inode(root_inode, &args);
|
||
|
unlock_new_inode(root_inode);
|
||
|
}
|
||
|
|
||
|
s->s_root = d_alloc_root(root_inode);
|
||
|
if (!s->s_root) {
|
||
|
iput(root_inode);
|
||
|
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
|
||
|
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);
|
||
|
|
||
|
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") ;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
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_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_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);
|
||
|
|
||
|
return (0);
|
||
|
|
||
|
error:
|
||
|
if (jinit_done) { /* kill the commit thread, free journal ram */
|
||
|
journal_release_error(NULL, s) ;
|
||
|
}
|
||
|
if (SB_DISK_SUPER_BLOCK (s)) {
|
||
|
for (j = 0; j < SB_BMAP_NR (s); j ++) {
|
||
|
if (SB_AP_BITMAP (s))
|
||
|
brelse (SB_AP_BITMAP (s)[j].bh);
|
||
|
}
|
||
|
if (SB_AP_BITMAP (s))
|
||
|
vfree (SB_AP_BITMAP (s));
|
||
|
}
|
||
|
if (SB_BUFFER_WITH_SB (s))
|
||
|
brelse(SB_BUFFER_WITH_SB (s));
|
||
|
#ifdef CONFIG_QUOTA
|
||
|
for (j = 0; j < MAXQUOTAS; j++) {
|
||
|
if (sbi->s_qf_names[j])
|
||
|
kfree(sbi->s_qf_names[j]);
|
||
|
}
|
||
|
#endif
|
||
|
if (sbi != NULL) {
|
||
|
kfree(sbi);
|
||
|
}
|
||
|
|
||
|
s->s_fs_info = NULL;
|
||
|
return errval;
|
||
|
}
|
||
|
|
||
|
|
||
|
static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf)
|
||
|
{
|
||
|
struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (s);
|
||
|
|
||
|
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 = s->s_blocksize;
|
||
|
/* changed to accommodate gcc folks.*/
|
||
|
buf->f_type = REISERFS_SUPER_MAGIC;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
#ifdef CONFIG_QUOTA
|
||
|
static int reiserfs_dquot_initialize(struct inode *inode, int type)
|
||
|
{
|
||
|
struct reiserfs_transaction_handle th;
|
||
|
int ret;
|
||
|
|
||
|
/* We may create quota structure so we need to reserve enough blocks */
|
||
|
reiserfs_write_lock(inode->i_sb);
|
||
|
journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
|
||
|
ret = dquot_initialize(inode, type);
|
||
|
journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
|
||
|
reiserfs_write_unlock(inode->i_sb);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int reiserfs_dquot_drop(struct inode *inode)
|
||
|
{
|
||
|
struct reiserfs_transaction_handle th;
|
||
|
int ret;
|
||
|
|
||
|
/* We may delete quota structure so we need to reserve enough blocks */
|
||
|
reiserfs_write_lock(inode->i_sb);
|
||
|
journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
|
||
|
ret = dquot_drop(inode);
|
||
|
journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
|
||
|
reiserfs_write_unlock(inode->i_sb);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int reiserfs_write_dquot(struct dquot *dquot)
|
||
|
{
|
||
|
struct reiserfs_transaction_handle th;
|
||
|
int ret;
|
||
|
|
||
|
reiserfs_write_lock(dquot->dq_sb);
|
||
|
journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS);
|
||
|
ret = dquot_commit(dquot);
|
||
|
journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS);
|
||
|
reiserfs_write_unlock(dquot->dq_sb);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int reiserfs_acquire_dquot(struct dquot *dquot)
|
||
|
{
|
||
|
struct reiserfs_transaction_handle th;
|
||
|
int ret;
|
||
|
|
||
|
reiserfs_write_lock(dquot->dq_sb);
|
||
|
journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
|
||
|
ret = dquot_acquire(dquot);
|
||
|
journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
|
||
|
reiserfs_write_unlock(dquot->dq_sb);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int reiserfs_release_dquot(struct dquot *dquot)
|
||
|
{
|
||
|
struct reiserfs_transaction_handle th;
|
||
|
int ret;
|
||
|
|
||
|
reiserfs_write_lock(dquot->dq_sb);
|
||
|
journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
|
||
|
ret = dquot_release(dquot);
|
||
|
journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
|
||
|
reiserfs_write_unlock(dquot->dq_sb);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
|
||
|
{
|
||
|
/* Are we journalling 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;
|
||
|
|
||
|
/* Data block + inode block */
|
||
|
reiserfs_write_lock(sb);
|
||
|
journal_begin(&th, sb, 2);
|
||
|
ret = dquot_commit_info(sb, type);
|
||
|
journal_end(&th, sb, 2);
|
||
|
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)
|
||
|
{
|
||
|
int err;
|
||
|
struct dentry *dentry;
|
||
|
struct qstr name = { .name = REISERFS_SB(sb)->s_qf_names[type],
|
||
|
.hash = 0,
|
||
|
.len = strlen(REISERFS_SB(sb)->s_qf_names[type])};
|
||
|
|
||
|
dentry = lookup_hash(&name, sb->s_root);
|
||
|
if (IS_ERR(dentry))
|
||
|
return PTR_ERR(dentry);
|
||
|
err = vfs_quota_on_mount(type, REISERFS_SB(sb)->s_jquota_fmt, dentry);
|
||
|
/* Now invalidate and put the dentry - quota got its own reference
|
||
|
* to inode and dentry has at least wrong hash so we had better
|
||
|
* throw it away */
|
||
|
d_invalidate(dentry);
|
||
|
dput(dentry);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Standard function to be called on quota_on
|
||
|
*/
|
||
|
static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
|
||
|
{
|
||
|
int err;
|
||
|
struct nameidata nd;
|
||
|
|
||
|
err = path_lookup(path, LOOKUP_FOLLOW, &nd);
|
||
|
if (err)
|
||
|
return err;
|
||
|
/* Quotafile not on the same filesystem? */
|
||
|
if (nd.mnt->mnt_sb != sb) {
|
||
|
path_release(&nd);
|
||
|
return -EXDEV;
|
||
|
}
|
||
|
/* We must not pack tails for quota files on reiserfs for quota IO to work */
|
||
|
if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
|
||
|
reiserfs_warning(sb, "reiserfs: Quota file must have tail packing disabled.");
|
||
|
path_release(&nd);
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
/* Not journalling quota? No more tests needed... */
|
||
|
if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
|
||
|
!REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
|
||
|
path_release(&nd);
|
||
|
return vfs_quota_on(sb, type, format_id, path);
|
||
|
}
|
||
|
/* Quotafile not of fs root? */
|
||
|
if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
|
||
|
reiserfs_warning(sb, "reiserfs: Quota file not on filesystem root. "
|
||
|
"Journalled quota will not work.");
|
||
|
path_release(&nd);
|
||
|
return vfs_quota_on(sb, type, format_id, path);
|
||
|
}
|
||
|
|
||
|
/* 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 noone 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;
|
||
|
|
||
|
down(&inode->i_sem);
|
||
|
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)
|
||
|
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);
|
||
|
up(&inode->i_sem);
|
||
|
return len - towrite;
|
||
|
}
|
||
|
|
||
|
#endif
|
||
|
|
||
|
static struct super_block*
|
||
|
get_super_block (struct file_system_type *fs_type, int flags,
|
||
|
const char *dev_name, void *data)
|
||
|
{
|
||
|
return get_sb_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;
|
||
|
}
|
||
|
|
||
|
if ((ret = reiserfs_xattr_register_handlers ()))
|
||
|
goto failed_reiserfs_xattr_register_handlers;
|
||
|
|
||
|
reiserfs_proc_info_global_init ();
|
||
|
reiserfs_proc_register_global ("version", reiserfs_global_version_in_proc);
|
||
|
|
||
|
ret = register_filesystem (& reiserfs_fs_type);
|
||
|
|
||
|
if (ret == 0) {
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
reiserfs_xattr_unregister_handlers ();
|
||
|
|
||
|
failed_reiserfs_xattr_register_handlers:
|
||
|
reiserfs_proc_unregister_global ("version");
|
||
|
reiserfs_proc_info_global_done ();
|
||
|
destroy_inodecache ();
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static void __exit
|
||
|
exit_reiserfs_fs ( void )
|
||
|
{
|
||
|
reiserfs_xattr_unregister_handlers ();
|
||
|
reiserfs_proc_unregister_global ("version");
|
||
|
reiserfs_proc_info_global_done ();
|
||
|
unregister_filesystem (& reiserfs_fs_type);
|
||
|
destroy_inodecache ();
|
||
|
}
|
||
|
|
||
|
struct file_system_type reiserfs_fs_type = {
|
||
|
.owner = THIS_MODULE,
|
||
|
.name = "reiserfs",
|
||
|
.get_sb = get_super_block,
|
||
|
.kill_sb = kill_block_super,
|
||
|
.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);
|