/*
* NAME: dbMount()
*
* FUNCTION: initializate the block allocation map.
*
* memory is allocated for the in-core bmap descriptor and
* the in-core descriptor is initialized from disk.
*
* PARAMETERS:
* ipbmap - pointer to in-core inode for the block map.
*
* RETURN VALUES:
* 0 - success
* -ENOMEM - insufficient memory
* -EIO - i/o error
*/
int dbMount(struct inode *ipbmap)
{
struct bmap *bmp;
struct dbmap_disk *dbmp_le;
struct metapage *mp;
int i;
/*
* allocate/initialize the in-memory bmap descriptor
*/
/* allocate memory for the in-memory bmap descriptor */
bmp = kmalloc(sizeof(struct bmap), GFP_KERNEL);
if (bmp == NULL)
return -ENOMEM;
/* read the on-disk bmap descriptor. */
mp = read_metapage(ipbmap,
BMAPBLKNO << JFS_SBI(ipbmap->i_sb)->l2nbperpage,
PSIZE, 0);
if (mp == NULL) {
kfree(bmp);
return -EIO;
}
/* copy the on-disk bmap descriptor to its in-memory version. */
dbmp_le = (struct dbmap_disk *) mp->data;
bmp->db_mapsize = le64_to_cpu(dbmp_le->dn_mapsize);
bmp->db_nfree = le64_to_cpu(dbmp_le->dn_nfree);
bmp->db_l2nbperpage = le32_to_cpu(dbmp_le->dn_l2nbperpage);
bmp->db_numag = le32_to_cpu(dbmp_le->dn_numag);
bmp->db_maxlevel = le32_to_cpu(dbmp_le->dn_maxlevel);
bmp->db_maxag = le32_to_cpu(dbmp_le->dn_maxag);
bmp->db_agpref = le32_to_cpu(dbmp_le->dn_agpref);
bmp->db_aglevel = le32_to_cpu(dbmp_le->dn_aglevel);
bmp->db_agheight = le32_to_cpu(dbmp_le->dn_agheight);
bmp->db_agwidth = le32_to_cpu(dbmp_le->dn_agwidth);
bmp->db_agstart = le32_to_cpu(dbmp_le->dn_agstart);
bmp->db_agl2size = le32_to_cpu(dbmp_le->dn_agl2size);
for (i = 0; i < MAXAG; i++)
bmp->db_agfree[i] = le64_to_cpu(dbmp_le->dn_agfree[i]);
bmp->db_agsize = le64_to_cpu(dbmp_le->dn_agsize);
bmp->db_maxfreebud = dbmp_le->dn_maxfreebud;
/* release the buffer. */
release_metapage(mp);
/* bind the bmap inode and the bmap descriptor to each other. */
bmp->db_ipbmap = ipbmap;
JFS_SBI(ipbmap->i_sb)->bmap = bmp;
memset(bmp->db_active, 0, sizeof(bmp->db_active));
/*
* allocate/initialize the bmap lock
*/
BMAP_LOCK_INIT(bmp);
return (0);
}
/*
* NAME: jfs_mount_rw(sb, remount)
*
* FUNCTION: Completes read-write mount, or remounts read-only volume
* as read-write
*/
int jfs_mount_rw(struct super_block *sb, int remount)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct jfs_log *log;
int rc;
/*
* If we are re-mounting a previously read-only volume, we want to
* re-read the inode and block maps, since fsck.jfs may have updated
* them.
*/
if (remount) {
if (chkSuper(sb) || (sbi->state != FM_CLEAN))
return -EINVAL;
truncate_inode_pages(sbi->ipimap->i_mapping, 0);
truncate_inode_pages(sbi->ipbmap->i_mapping, 0);
diUnmount(sbi->ipimap, 1);
if ((rc = diMount(sbi->ipimap))) {
jfs_err("jfs_mount_rw: diMount failed!");
return rc;
}
dbUnmount(sbi->ipbmap, 1);
if ((rc = dbMount(sbi->ipbmap))) {
jfs_err("jfs_mount_rw: dbMount failed!");
return rc;
}
}
/*
* open/initialize log
*/
if ((rc = lmLogOpen(sb, &log)))
return rc;
JFS_SBI(sb)->log = log;
/*
* update file system superblock;
*/
if ((rc = updateSuper(sb, FM_MOUNT))) {
jfs_err("jfs_mount: updateSuper failed w/rc = %d", rc);
lmLogClose(sb, log);
JFS_SBI(sb)->log = 0;
return rc;
}
/*
* write MOUNT log record of the file system
*/
logMOUNT(sb);
return rc;
}
/*
* dbSync()
*/
int dbSync(struct inode *ipbmap)
{
struct dbmap_disk *dbmp_le;
struct bmap *bmp = JFS_SBI(ipbmap->i_sb)->bmap;
struct metapage *mp;
int i;
/*
* write bmap global control page
*/
/* get the buffer for the on-disk bmap descriptor. */
mp = read_metapage(ipbmap,
BMAPBLKNO << JFS_SBI(ipbmap->i_sb)->l2nbperpage,
PSIZE, 0);
if (mp == NULL) {
jfs_err("dbSync: read_metapage failed!");
return -EIO;
}
/* copy the in-memory version of the bmap to the on-disk version */
dbmp_le = (struct dbmap_disk *) mp->data;
dbmp_le->dn_mapsize = cpu_to_le64(bmp->db_mapsize);
dbmp_le->dn_nfree = cpu_to_le64(bmp->db_nfree);
dbmp_le->dn_l2nbperpage = cpu_to_le32(bmp->db_l2nbperpage);
dbmp_le->dn_numag = cpu_to_le32(bmp->db_numag);
dbmp_le->dn_maxlevel = cpu_to_le32(bmp->db_maxlevel);
dbmp_le->dn_maxag = cpu_to_le32(bmp->db_maxag);
dbmp_le->dn_agpref = cpu_to_le32(bmp->db_agpref);
dbmp_le->dn_aglevel = cpu_to_le32(bmp->db_aglevel);
dbmp_le->dn_agheight = cpu_to_le32(bmp->db_agheight);
dbmp_le->dn_agwidth = cpu_to_le32(bmp->db_agwidth);
dbmp_le->dn_agstart = cpu_to_le32(bmp->db_agstart);
dbmp_le->dn_agl2size = cpu_to_le32(bmp->db_agl2size);
for (i = 0; i < MAXAG; i++)
dbmp_le->dn_agfree[i] = cpu_to_le64(bmp->db_agfree[i]);
dbmp_le->dn_agsize = cpu_to_le64(bmp->db_agsize);
dbmp_le->dn_maxfreebud = bmp->db_maxfreebud;
/* write the buffer */
write_metapage(mp);
/*
* write out dirty pages of bmap
*/
filemap_write_and_wait(ipbmap->i_mapping);
diWriteSpecial(ipbmap, 0);
return (0);
}
static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd)
{
struct btstack btstack;
ino_t inum;
struct inode *ip;
struct component_name key;
const char *name = dentry->d_name.name;
int len = dentry->d_name.len;
int rc;
jfs_info("jfs_lookup: name = %s", name);
if ((name[0] == '.') && (len == 1))
inum = dip->i_ino;
else if (strcmp(name, "..") == 0)
inum = PARENT(dip);
else {
if ((rc = get_UCSname(&key, dentry)))
return ERR_PTR(rc);
rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);
free_UCSname(&key);
if (rc == -ENOENT) {
d_add(dentry, NULL);
return ERR_PTR(0);
} else if (rc) {
jfs_err("jfs_lookup: dtSearch returned %d", rc);
return ERR_PTR(rc);
}
}
ip = iget(dip->i_sb, inum);
if (ip == NULL || is_bad_inode(ip)) {
jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum);
if (ip)
iput(ip);
return ERR_PTR(-EACCES);
}
if (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2)
dentry->d_op = &jfs_ci_dentry_operations;
dentry = d_splice_alias(ip, dentry);
if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2))
dentry->d_op = &jfs_ci_dentry_operations;
return dentry;
}
void jfs_clear_inode(struct inode *inode)
{
struct jfs_inode_info *ji = JFS_IP(inode);
if (is_bad_inode(inode))
/*
* We free the fs-dependent structure before making the
* inode bad
*/
return;
jfs_info("jfs_clear_inode called ip = 0x%p", inode);
if (ji->active_ag != -1) {
struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
atomic_dec(&bmap->db_active[ji->active_ag]);
}
ASSERT(list_empty(&ji->anon_inode_list));
if (ji->atlhead) {
jfs_err("jfs_clear_inode: inode %p has anonymous tlocks",
inode);
jfs_err("i_state = 0x%lx, cflag = 0x%lx", inode->i_state,
ji->cflag);
}
free_jfs_inode(inode);
}
static int jfs_open(struct inode *inode, struct file *file)
{
int rc;
if ((rc = dquot_file_open(inode, file)))
return rc;
/*
* We attempt to allow only one "active" file open per aggregate
* group. Otherwise, appending to files in parallel can cause
* fragmentation within the files.
*
* If the file is empty, it was probably just created and going
* to be written to. If it has a size, we'll hold off until the
* file is actually grown.
*/
if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
(inode->i_size == 0)) {
struct jfs_inode_info *ji = JFS_IP(inode);
spin_lock_irq(&ji->ag_lock);
if (ji->active_ag == -1) {
struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
atomic_inc( &jfs_sb->bmap->db_active[ji->active_ag]);
}
spin_unlock_irq(&ji->ag_lock);
}
return 0;
}
int jfs_umount_rw(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct jfs_log *log = sbi->log;
if (!log)
return 0;
/*
* close log:
*
* remove file system from log active file system list.
*/
jfs_flush_journal(log, 2);
/*
* Make sure all metadata makes it to disk
*/
dbSync(sbi->ipbmap);
diSync(sbi->ipimap);
fsync_inode_data_buffers(sb->s_bdev->bd_inode);
updateSuper(sb, FM_CLEAN);
sbi->log = NULL;
return lmLogClose(sb, log);
}
int jfs_umount_rw(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct jfs_log *log = sbi->log;
if (!log)
return 0;
/*
* close log:
*
* remove file system from log active file system list.
*/
jfs_flush_journal(log, 1);
/*
* Make sure all metadata makes it to disk
*/
dbSync(sbi->ipbmap);
diSync(sbi->ipimap);
/*
* Note that we have to do this even if sync_blockdev() will
* do exactly the same a few instructions later: We can't
* mark the superblock clean before everything is flushed to
* disk.
*/
filemap_write_and_wait(sbi->direct_inode->i_mapping);
updateSuper(sb, FM_CLEAN);
return lmLogClose(sb);
}
static int jfs_release(struct inode *inode, struct file *file)
{
struct jfs_inode_info *ji = JFS_IP(inode);
if (ji->active_ag != -1) {
struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
atomic_dec(&bmap->db_active[ji->active_ag]);
ji->active_ag = -1;
}
return 0;
}
int jfs_umount(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipbmap = sbi->ipbmap;
struct inode *ipimap = sbi->ipimap;
struct inode *ipaimap = sbi->ipaimap;
struct inode *ipaimap2 = sbi->ipaimap2;
struct jfs_log *log;
int rc = 0;
jfs_info("UnMount JFS: sb:0x%p", sb);
if ((log = sbi->log))
/*
* Wait for outstanding transactions to be written to log:
*/
jfs_flush_journal(log, 2);
diUnmount(ipimap, 0);
diFreeSpecial(ipimap);
sbi->ipimap = NULL;
ipaimap2 = sbi->ipaimap2;
if (ipaimap2) {
diUnmount(ipaimap2, 0);
diFreeSpecial(ipaimap2);
sbi->ipaimap2 = NULL;
}
ipaimap = sbi->ipaimap;
diUnmount(ipaimap, 0);
diFreeSpecial(ipaimap);
sbi->ipaimap = NULL;
dbUnmount(ipbmap, 0);
diFreeSpecial(ipbmap);
sbi->ipimap = NULL;
filemap_write_and_wait(sbi->direct_inode->i_mapping);
if (log) {
updateSuper(sb, FM_CLEAN);
rc = lmLogClose(sb);
}
jfs_info("UnMount JFS Complete: rc = %d", rc);
return rc;
}
/*
* updateSuper()
*
* update synchronously superblock if it is mounted read-write.
*/
int updateSuper(struct super_block *sb, uint state)
{
struct jfs_superblock *j_sb;
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct buffer_head *bh;
int rc;
if (sbi->flag & JFS_NOINTEGRITY) {
if (state == FM_DIRTY) {
sbi->p_state = state;
return 0;
} else if (state == FM_MOUNT) {
sbi->p_state = sbi->state;
state = FM_DIRTY;
} else if (state == FM_CLEAN) {
state = sbi->p_state;
} else
jfs_err("updateSuper: bad state");
} else if (sbi->state == FM_DIRTY)
return 0;
if ((rc = readSuper(sb, &bh)))
return rc;
j_sb = (struct jfs_superblock *)bh->b_data;
j_sb->s_state = cpu_to_le32(state);
sbi->state = state;
if (state == FM_MOUNT) {
/* record log's dev_t and mount serial number */
j_sb->s_logdev = cpu_to_le32(sbi->log->bdev->bd_dev);
j_sb->s_logserial = cpu_to_le32(sbi->log->serial);
} else if (state == FM_CLEAN) {
/*
* If this volume is shared with OS/2, OS/2 will need to
* recalculate DASD usage, since we don't deal with it.
*/
if (j_sb->s_flag & cpu_to_le32(JFS_DASD_ENABLED))
j_sb->s_flag |= cpu_to_le32(JFS_DASD_PRIME);
}
mark_buffer_dirty(bh);
ll_rw_block(WRITE, 1, &bh);
wait_on_buffer(bh);
brelse(bh);
return 0;
}
static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry)
{
struct btstack btstack;
ino_t inum;
struct inode *ip;
struct component_name key;
const char *name = dentry->d_name.name;
int len = dentry->d_name.len;
int rc;
jfs_info("jfs_lookup: name = %s", name);
if ((name[0] == '.') && (len == 1))
inum = dip->i_ino;
else if (strcmp(name, "..") == 0)
inum = PARENT(dip);
else {
if ((rc =
get_UCSname(&key, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
return ERR_PTR(rc);
rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);
free_UCSname(&key);
if (rc == -ENOENT) {
d_add(dentry, NULL);
return ERR_PTR(0);
} else if (rc) {
jfs_err("jfs_lookup: dtSearch returned %d", rc);
return ERR_PTR(rc);
}
}
ip = iget(dip->i_sb, inum);
if (ip == NULL) {
jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum);
return ERR_PTR(-EACCES);
}
if (is_bad_inode(ip)) {
jfs_err("jfs_lookup: iget returned bad inode, inum = %d",
(uint) inum);
iput(ip);
return ERR_PTR(-EACCES);
}
d_add(dentry, ip);
return ERR_PTR(0);
}
int jfs_fsync(struct file *file, struct dentry *dentry, int datasync)
{
struct inode *inode = dentry->d_inode;
int rc = 0;
if (!(inode->i_state & I_DIRTY) ||
(datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
/* Make sure committed changes hit the disk */
jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
return rc;
}
rc |= jfs_commit_inode(inode, 1);
return rc ? -EIO : 0;
}
/*
* NAME: dbUnmount()
*
* FUNCTION: terminate the block allocation map in preparation for
* file system unmount.
*
* the in-core bmap descriptor is written to disk and
* the memory for this descriptor is freed.
*
* PARAMETERS:
* ipbmap - pointer to in-core inode for the block map.
*
* RETURN VALUES:
* 0 - success
* -EIO - i/o error
*/
int dbUnmount(struct inode *ipbmap, int mounterror)
{
struct bmap *bmp = JFS_SBI(ipbmap->i_sb)->bmap;
if (!(mounterror || isReadOnly(ipbmap)))
dbSync(ipbmap);
/*
* Invalidate the page cache buffers
*/
truncate_inode_pages(ipbmap->i_mapping, 0);
/* free the memory for the in-memory bmap. */
kfree(bmp);
return (0);
}
int updateSuper(struct super_block *sb, uint state)
{
struct jfs_superblock *j_sb;
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct buffer_head *bh;
int rc;
if (sbi->flag & JFS_NOINTEGRITY) {
if (state == FM_DIRTY) {
sbi->p_state = state;
return 0;
} else if (state == FM_MOUNT) {
sbi->p_state = sbi->state;
state = FM_DIRTY;
} else if (state == FM_CLEAN) {
state = sbi->p_state;
} else
jfs_err("updateSuper: bad state");
} else if (sbi->state == FM_DIRTY)
return 0;
if ((rc = readSuper(sb, &bh)))
return rc;
j_sb = (struct jfs_superblock *)bh->b_data;
j_sb->s_state = cpu_to_le32(state);
sbi->state = state;
if (state == FM_MOUNT) {
j_sb->s_logdev = cpu_to_le32(new_encode_dev(sbi->log->bdev->bd_dev));
j_sb->s_logserial = cpu_to_le32(sbi->log->serial);
} else if (state == FM_CLEAN) {
if (j_sb->s_flag & cpu_to_le32(JFS_DASD_ENABLED))
j_sb->s_flag |= cpu_to_le32(JFS_DASD_PRIME);
}
mark_buffer_dirty(bh);
sync_dirty_buffer(bh);
brelse(bh);
return 0;
}
int jfs_umount_rw(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct jfs_log *log = sbi->log;
if (!log)
return 0;
jfs_flush_journal(log, 2);
dbSync(sbi->ipbmap);
diSync(sbi->ipimap);
filemap_write_and_wait(sbi->direct_inode->i_mapping);
updateSuper(sb, FM_CLEAN);
return lmLogClose(sb);
}
void jfs_write_inode(struct inode *inode, int wait)
{
if (test_cflag(COMMIT_Nolink, inode))
return;
/*
* If COMMIT_DIRTY is not set, the inode isn't really dirty.
* It has been committed since the last change, but was still
* on the dirty inode list.
*/
if (!test_cflag(COMMIT_Dirty, inode)) {
/* Make sure committed changes hit the disk */
jfs_flush_journal(JFS_SBI(inode->i_sb)->log, wait);
return;
}
if (jfs_commit_inode(inode, wait)) {
jfs_err("jfs_write_inode: jfs_commit_inode failed!");
}
}
void jfs_clear_inode(struct inode *inode)
{
struct jfs_inode_info *ji = JFS_IP(inode);
if (is_bad_inode(inode))
/*
* We free the fs-dependent structure before making the
* inode bad
*/
return;
jfs_info("jfs_clear_inode called ip = 0x%p", inode);
if (ji->active_ag != -1) {
struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
atomic_dec(&bmap->db_active[ji->active_ag]);
}
ASSERT(list_empty(&ji->anon_inode_list));
#ifdef CONFIG_JFS_POSIX_ACL
if (ji->i_acl != JFS_ACL_NOT_CACHED) {
posix_acl_release(ji->i_acl);
ji->i_acl = JFS_ACL_NOT_CACHED;
}
if (ji->i_default_acl != JFS_ACL_NOT_CACHED) {
posix_acl_release(ji->i_default_acl);
ji->i_default_acl = JFS_ACL_NOT_CACHED;
}
#endif
if (ji->atlhead) {
jfs_err("jfs_clear_inode: inode %p has anonymous tlocks",
inode);
jfs_err("i_state = 0x%lx, cflag = 0x%lx", inode->i_state,
ji->cflag);
}
free_jfs_inode(inode);
}
int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
struct inode *inode = file->f_mapping->host;
int rc = 0;
rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (rc)
return rc;
mutex_lock(&inode->i_mutex);
if (!(inode->i_state & I_DIRTY_ALL) ||
(datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
/* Make sure committed changes hit the disk */
jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
mutex_unlock(&inode->i_mutex);
return rc;
}
rc |= jfs_commit_inode(inode, 1);
mutex_unlock(&inode->i_mutex);
return rc ? -EIO : 0;
}
int jfs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
int wait = 1; /* XXX fix fsync and use wbc->sync_mode == WB_SYNC_ALL; */
if (test_cflag(COMMIT_Nolink, inode))
return 0;
/*
* If COMMIT_DIRTY is not set, the inode isn't really dirty.
* It has been committed since the last change, but was still
* on the dirty inode list.
*/
if (!test_cflag(COMMIT_Dirty, inode)) {
/* Make sure committed changes hit the disk */
jfs_flush_journal(JFS_SBI(inode->i_sb)->log, wait);
return 0;
}
if (jfs_commit_inode(inode, wait)) {
jfs_err("jfs_write_inode: jfs_commit_inode failed!");
return -EIO;
} else
return 0;
}
int jfs_mount_rw(struct super_block *sb, int remount)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
int rc;
if (remount) {
if (chkSuper(sb) || (sbi->state != FM_CLEAN))
return -EINVAL;
truncate_inode_pages(sbi->ipimap->i_mapping, 0);
truncate_inode_pages(sbi->ipbmap->i_mapping, 0);
diUnmount(sbi->ipimap, 1);
if ((rc = diMount(sbi->ipimap))) {
jfs_err("jfs_mount_rw: diMount failed!");
return rc;
}
dbUnmount(sbi->ipbmap, 1);
if ((rc = dbMount(sbi->ipbmap))) {
jfs_err("jfs_mount_rw: dbMount failed!");
return rc;
}
}
if ((rc = lmLogOpen(sb)))
return rc;
if ((rc = updateSuper(sb, FM_MOUNT))) {
jfs_err("jfs_mount: updateSuper failed w/rc = %d", rc);
lmLogClose(sb);
return rc;
}
logMOUNT(sb);
return rc;
}
/*
* NAME: get_UCSname()
*
* FUNCTION: Allocate and translate to unicode string
*
*/
int get_UCSname(struct component_name * uniName, struct dentry *dentry)
{
struct nls_table *nls_tab = JFS_SBI(dentry->d_sb)->nls_tab;
int length = dentry->d_name.len;
if (length > JFS_NAME_MAX)
return -ENAMETOOLONG;
uniName->name =
kmalloc((length + 1) * sizeof(wchar_t), GFP_NOFS);
if (uniName->name == NULL)
return -ENOMEM;
uniName->namlen = jfs_strtoUCS(uniName->name, dentry->d_name.name,
length, nls_tab);
if (uniName->namlen < 0) {
kfree(uniName->name);
return uniName->namlen;
}
return 0;
}
/*
* NAME: ialloc()
*
* FUNCTION: Allocate a new inode
*
*/
struct inode *ialloc(struct inode *parent, umode_t mode)
{
struct super_block *sb = parent->i_sb;
struct inode *inode;
struct jfs_inode_info *jfs_inode;
int rc;
inode = new_inode(sb);
if (!inode) {
jfs_warn("ialloc: new_inode returned NULL!");
return ERR_PTR(-ENOMEM);
}
jfs_inode = JFS_IP(inode);
rc = diAlloc(parent, S_ISDIR(mode), inode);
if (rc) {
jfs_warn("ialloc: diAlloc returned %d!", rc);
if (rc == -EIO)
make_bad_inode(inode);
iput(inode);
return ERR_PTR(rc);
}
inode->i_uid = current_fsuid();
if (parent->i_mode & S_ISGID) {
inode->i_gid = parent->i_gid;
if (S_ISDIR(mode))
mode |= S_ISGID;
} else
inode->i_gid = current_fsgid();
/*
* New inodes need to save sane values on disk when
* uid & gid mount options are used
*/
jfs_inode->saved_uid = inode->i_uid;
jfs_inode->saved_gid = inode->i_gid;
/*
* Allocate inode to quota.
*/
if (DQUOT_ALLOC_INODE(inode)) {
DQUOT_DROP(inode);
inode->i_flags |= S_NOQUOTA;
inode->i_nlink = 0;
iput(inode);
return ERR_PTR(-EDQUOT);
}
inode->i_mode = mode;
/* inherit flags from parent */
jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;
if (S_ISDIR(mode)) {
jfs_inode->mode2 |= IDIRECTORY;
jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
}
else {
jfs_inode->mode2 |= INLINEEA | ISPARSE;
if (S_ISLNK(mode))
jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
}
jfs_inode->mode2 |= mode;
inode->i_blocks = 0;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
jfs_inode->otime = inode->i_ctime.tv_sec;
inode->i_generation = JFS_SBI(sb)->gengen++;
jfs_inode->cflag = 0;
/* Zero remaining fields */
memset(&jfs_inode->acl, 0, sizeof(dxd_t));
memset(&jfs_inode->ea, 0, sizeof(dxd_t));
jfs_inode->next_index = 0;
jfs_inode->acltype = 0;
jfs_inode->btorder = 0;
jfs_inode->btindex = 0;
jfs_inode->bxflag = 0;
jfs_inode->blid = 0;
jfs_inode->atlhead = 0;
jfs_inode->atltail = 0;
jfs_inode->xtlid = 0;
jfs_set_inode_flags(inode);
jfs_info("ialloc returns inode = 0x%p\n", inode);
return inode;
}
/*
* NAME: jfs_mount(sb)
*
* FUNCTION: vfs_mount()
*
* PARAMETER: sb - super block
*
* RETURN: -EBUSY - device already mounted or open for write
* -EBUSY - cvrdvp already mounted;
* -EBUSY - mount table full
* -ENOTDIR- cvrdvp not directory on a device mount
* -ENXIO - device open failure
*/
int jfs_mount(struct super_block *sb)
{
int rc = 0; /* Return code */
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipaimap = NULL;
struct inode *ipaimap2 = NULL;
struct inode *ipimap = NULL;
struct inode *ipbmap = NULL;
/*
* read/validate superblock
* (initialize mount inode from the superblock)
*/
if ((rc = chkSuper(sb))) {
goto errout20;
}
ipaimap = diReadSpecial(sb, AGGREGATE_I, 0);
if (ipaimap == NULL) {
jfs_err("jfs_mount: Faild to read AGGREGATE_I");
rc = -EIO;
goto errout20;
}
sbi->ipaimap = ipaimap;
jfs_info("jfs_mount: ipaimap:0x%p", ipaimap);
/*
* initialize aggregate inode allocation map
*/
if ((rc = diMount(ipaimap))) {
jfs_err("jfs_mount: diMount(ipaimap) failed w/rc = %d", rc);
goto errout21;
}
/*
* open aggregate block allocation map
*/
ipbmap = diReadSpecial(sb, BMAP_I, 0);
if (ipbmap == NULL) {
rc = -EIO;
goto errout22;
}
jfs_info("jfs_mount: ipbmap:0x%p", ipbmap);
sbi->ipbmap = ipbmap;
/*
* initialize aggregate block allocation map
*/
if ((rc = dbMount(ipbmap))) {
jfs_err("jfs_mount: dbMount failed w/rc = %d", rc);
goto errout22;
}
/*
* open the secondary aggregate inode allocation map
*
* This is a duplicate of the aggregate inode allocation map.
*
* hand craft a vfs in the same fashion as we did to read ipaimap.
* By adding INOSPEREXT (32) to the inode number, we are telling
* diReadSpecial that we are reading from the secondary aggregate
* inode table. This also creates a unique entry in the inode hash
* table.
*/
if ((sbi->mntflag & JFS_BAD_SAIT) == 0) {
ipaimap2 = diReadSpecial(sb, AGGREGATE_I, 1);
if (ipaimap2 == 0) {
jfs_err("jfs_mount: Faild to read AGGREGATE_I");
rc = -EIO;
goto errout35;
}
sbi->ipaimap2 = ipaimap2;
jfs_info("jfs_mount: ipaimap2:0x%p", ipaimap2);
/*
* initialize secondary aggregate inode allocation map
*/
if ((rc = diMount(ipaimap2))) {
jfs_err("jfs_mount: diMount(ipaimap2) failed, rc = %d",
rc);
goto errout35;
}
} else
/* Secondary aggregate inode table is not valid */
sbi->ipaimap2 = NULL;
/*
* mount (the only/single) fileset
*/
/*
* open fileset inode allocation map (aka fileset inode)
*/
ipimap = diReadSpecial(sb, FILESYSTEM_I, 0);
if (ipimap == NULL) {
jfs_err("jfs_mount: Failed to read FILESYSTEM_I");
/* open fileset secondary inode allocation map */
rc = -EIO;
goto errout40;
}
jfs_info("jfs_mount: ipimap:0x%p", ipimap);
/* map further access of per fileset inodes by the fileset inode */
sbi->ipimap = ipimap;
/* initialize fileset inode allocation map */
if ((rc = diMount(ipimap))) {
jfs_err("jfs_mount: diMount failed w/rc = %d", rc);
goto errout41;
}
goto out;
/*
* unwind on error
*/
errout41: /* close fileset inode allocation map inode */
diFreeSpecial(ipimap);
errout40: /* fileset closed */
/* close secondary aggregate inode allocation map */
if (ipaimap2) {
diUnmount(ipaimap2, 1);
diFreeSpecial(ipaimap2);
}
errout35:
/* close aggregate block allocation map */
dbUnmount(ipbmap, 1);
diFreeSpecial(ipbmap);
errout22: /* close aggregate inode allocation map */
diUnmount(ipaimap, 1);
errout21: /* close aggregate inodes */
diFreeSpecial(ipaimap);
errout20: /* aggregate closed */
out:
if (rc)
jfs_err("Mount JFS Failure: %d", rc);
return rc;
}
/*
* chkSuper()
*
* validate the superblock of the file system to be mounted and
* get the file system parameters.
*
* returns
* 0 with fragsize set if check successful
* error code if not successful
*/
static int chkSuper(struct super_block *sb)
{
int rc = 0;
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct jfs_superblock *j_sb;
struct buffer_head *bh;
int AIM_bytesize, AIT_bytesize;
int expected_AIM_bytesize, expected_AIT_bytesize;
s64 AIM_byte_addr, AIT_byte_addr, fsckwsp_addr;
s64 byte_addr_diff0, byte_addr_diff1;
s32 bsize;
if ((rc = readSuper(sb, &bh)))
return rc;
j_sb = (struct jfs_superblock *)bh->b_data;
/*
* validate superblock
*/
/* validate fs signature */
if (strncmp(j_sb->s_magic, JFS_MAGIC, 4) ||
le32_to_cpu(j_sb->s_version) > JFS_VERSION) {
rc = -EINVAL;
goto out;
}
bsize = le32_to_cpu(j_sb->s_bsize);
#ifdef _JFS_4K
if (bsize != PSIZE) {
jfs_err("Currently only 4K block size supported!");
rc = -EINVAL;
goto out;
}
#endif /* _JFS_4K */
jfs_info("superblock: flag:0x%08x state:0x%08x size:0x%Lx",
le32_to_cpu(j_sb->s_flag), le32_to_cpu(j_sb->s_state),
(unsigned long long) le64_to_cpu(j_sb->s_size));
/* validate the descriptors for Secondary AIM and AIT */
if ((j_sb->s_flag & cpu_to_le32(JFS_BAD_SAIT)) !=
cpu_to_le32(JFS_BAD_SAIT)) {
expected_AIM_bytesize = 2 * PSIZE;
AIM_bytesize = lengthPXD(&(j_sb->s_aim2)) * bsize;
expected_AIT_bytesize = 4 * PSIZE;
AIT_bytesize = lengthPXD(&(j_sb->s_ait2)) * bsize;
AIM_byte_addr = addressPXD(&(j_sb->s_aim2)) * bsize;
AIT_byte_addr = addressPXD(&(j_sb->s_ait2)) * bsize;
byte_addr_diff0 = AIT_byte_addr - AIM_byte_addr;
fsckwsp_addr = addressPXD(&(j_sb->s_fsckpxd)) * bsize;
byte_addr_diff1 = fsckwsp_addr - AIT_byte_addr;
if ((AIM_bytesize != expected_AIM_bytesize) ||
(AIT_bytesize != expected_AIT_bytesize) ||
(byte_addr_diff0 != AIM_bytesize) ||
(byte_addr_diff1 <= AIT_bytesize))
j_sb->s_flag |= cpu_to_le32(JFS_BAD_SAIT);
}
if ((j_sb->s_flag & cpu_to_le32(JFS_GROUPCOMMIT)) !=
cpu_to_le32(JFS_GROUPCOMMIT))
j_sb->s_flag |= cpu_to_le32(JFS_GROUPCOMMIT);
/* validate fs state */
if (j_sb->s_state != cpu_to_le32(FM_CLEAN) &&
!(sb->s_flags & MS_RDONLY)) {
jfs_err("jfs_mount: Mount Failure: File System Dirty.");
rc = -EINVAL;
goto out;
}
sbi->state = le32_to_cpu(j_sb->s_state);
sbi->mntflag = le32_to_cpu(j_sb->s_flag);
/*
* JFS always does I/O by 4K pages. Don't tell the buffer cache
* that we use anything else (leave s_blocksize alone).
*/
sbi->bsize = bsize;
sbi->l2bsize = le16_to_cpu(j_sb->s_l2bsize);
/*
* For now, ignore s_pbsize, l2bfactor. All I/O going through buffer
* cache.
*/
sbi->nbperpage = PSIZE >> sbi->l2bsize;
sbi->l2nbperpage = L2PSIZE - sbi->l2bsize;
sbi->l2niperblk = sbi->l2bsize - L2DISIZE;
if (sbi->mntflag & JFS_INLINELOG)
sbi->logpxd = j_sb->s_logpxd;
else {
sbi->logdev = new_decode_dev(le32_to_cpu(j_sb->s_logdev));
memcpy(sbi->uuid, j_sb->s_uuid, sizeof(sbi->uuid));
memcpy(sbi->loguuid, j_sb->s_loguuid, sizeof(sbi->uuid));
}
sbi->fsckpxd = j_sb->s_fsckpxd;
sbi->ait2 = j_sb->s_ait2;
out:
brelse(bh);
return rc;
}
static int jfs_symlink(struct inode *dip, struct dentry *dentry,
const char *name)
{
int rc;
tid_t tid;
ino_t ino = 0;
struct component_name dname;
int ssize; /* source pathname size */
struct btstack btstack;
struct inode *ip = dentry->d_inode;
unchar *i_fastsymlink;
s64 xlen = 0;
int bmask = 0, xsize;
s64 extent = 0, xaddr;
struct metapage *mp;
struct super_block *sb;
struct tblock *tblk;
struct inode *iplist[2];
jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name);
dquot_initialize(dip);
ssize = strlen(name) + 1;
/*
* search parent directory for entry/freespace
* (dtSearch() returns parent directory page pinned)
*/
if ((rc = get_UCSname(&dname, dentry)))
goto out1;
/*
* allocate on-disk/in-memory inode for symbolic link:
* (iAlloc() returns new, locked inode)
*/
ip = ialloc(dip, S_IFLNK | 0777);
if (IS_ERR(ip)) {
rc = PTR_ERR(ip);
goto out2;
}
tid = txBegin(dip->i_sb, 0);
mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT);
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
rc = jfs_init_security(tid, ip, dip, &dentry->d_name);
if (rc)
goto out3;
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_CREATE;
tblk->ino = ip->i_ino;
tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
/* fix symlink access permission
* (dir_create() ANDs in the u.u_cmask,
* but symlinks really need to be 777 access)
*/
ip->i_mode |= 0777;
/*
* write symbolic link target path name
*/
xtInitRoot(tid, ip);
/*
* write source path name inline in on-disk inode (fast symbolic link)
*/
if (ssize <= IDATASIZE) {
ip->i_op = &jfs_fast_symlink_inode_operations;
i_fastsymlink = JFS_IP(ip)->i_inline;
memcpy(i_fastsymlink, name, ssize);
ip->i_size = ssize - 1;
/*
* if symlink is > 128 bytes, we don't have the space to
* store inline extended attributes
*/
if (ssize > sizeof (JFS_IP(ip)->i_inline))
JFS_IP(ip)->mode2 &= ~INLINEEA;
jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ",
ssize, name);
}
/*
* write source path name in a single extent
*/
else {
jfs_info("jfs_symlink: allocate extent ip:0x%p", ip);
ip->i_op = &jfs_symlink_inode_operations;
ip->i_mapping->a_ops = &jfs_aops;
/*
* even though the data of symlink object (source
* path name) is treated as non-journaled user data,
* it is read/written thru buffer cache for performance.
*/
sb = ip->i_sb;
bmask = JFS_SBI(sb)->bsize - 1;
xsize = (ssize + bmask) & ~bmask;
xaddr = 0;
xlen = xsize >> JFS_SBI(sb)->l2bsize;
if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0))) {
txAbort(tid, 0);
goto out3;
}
extent = xaddr;
ip->i_size = ssize - 1;
while (ssize) {
/* This is kind of silly since PATH_MAX == 4K */
int copy_size = min(ssize, PSIZE);
mp = get_metapage(ip, xaddr, PSIZE, 1);
if (mp == NULL) {
xtTruncate(tid, ip, 0, COMMIT_PWMAP);
rc = -EIO;
txAbort(tid, 0);
goto out3;
}
memcpy(mp->data, name, copy_size);
flush_metapage(mp);
ssize -= copy_size;
name += copy_size;
xaddr += JFS_SBI(sb)->nbperpage;
}
}
/*
* create entry for symbolic link in parent directory
*/
rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE);
if (rc == 0) {
ino = ip->i_ino;
rc = dtInsert(tid, dip, &dname, &ino, &btstack);
}
if (rc) {
if (xlen)
xtTruncate(tid, ip, 0, COMMIT_PWMAP);
txAbort(tid, 0);
/* discard new inode */
goto out3;
}
mark_inode_dirty(ip);
dip->i_ctime = dip->i_mtime = CURRENT_TIME;
mark_inode_dirty(dip);
/*
* commit update of parent directory and link object
*/
iplist[0] = dip;
iplist[1] = ip;
rc = txCommit(tid, 2, &iplist[0], 0);
out3:
txEnd(tid);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
mutex_unlock(&JFS_IP(dip)->commit_mutex);
if (rc) {
free_ea_wmap(ip);
ip->i_nlink = 0;
unlock_new_inode(ip);
iput(ip);
} else {
d_instantiate(dentry, ip);
unlock_new_inode(ip);
}
out2:
free_UCSname(&dname);
out1:
jfs_info("jfs_symlink: rc:%d", rc);
return rc;
}
/*
* NAME: ialloc()
*
* FUNCTION: Allocate a new inode
*
*/
struct inode *ialloc(struct inode *parent, umode_t mode)
{
struct super_block *sb = parent->i_sb;
struct inode *inode;
struct jfs_inode_info *jfs_inode;
int rc;
inode = new_inode(sb);
if (!inode) {
jfs_warn("ialloc: new_inode returned NULL!");
rc = -ENOMEM;
goto fail;
}
jfs_inode = JFS_IP(inode);
rc = diAlloc(parent, S_ISDIR(mode), inode);
if (rc) {
jfs_warn("ialloc: diAlloc returned %d!", rc);
if (rc == -EIO)
make_bad_inode(inode);
goto fail_put;
}
if (insert_inode_locked(inode) < 0) {
rc = -EINVAL;
goto fail_unlock;
}
inode_init_owner(inode, parent, mode);
/*
* New inodes need to save sane values on disk when
* uid & gid mount options are used
*/
jfs_inode->saved_uid = inode->i_uid;
jfs_inode->saved_gid = inode->i_gid;
/*
* Allocate inode to quota.
*/
dquot_initialize(inode);
rc = dquot_alloc_inode(inode);
if (rc)
goto fail_drop;
/* inherit flags from parent */
jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;
if (S_ISDIR(mode)) {
jfs_inode->mode2 |= IDIRECTORY;
jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
}
else {
jfs_inode->mode2 |= INLINEEA | ISPARSE;
if (S_ISLNK(mode))
jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
}
jfs_inode->mode2 |= inode->i_mode;
inode->i_blocks = 0;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
jfs_inode->otime = inode->i_ctime.tv_sec;
inode->i_generation = JFS_SBI(sb)->gengen++;
jfs_inode->cflag = 0;
/* Zero remaining fields */
memset(&jfs_inode->acl, 0, sizeof(dxd_t));
memset(&jfs_inode->ea, 0, sizeof(dxd_t));
jfs_inode->next_index = 0;
jfs_inode->acltype = 0;
jfs_inode->btorder = 0;
jfs_inode->btindex = 0;
jfs_inode->bxflag = 0;
jfs_inode->blid = 0;
jfs_inode->atlhead = 0;
jfs_inode->atltail = 0;
jfs_inode->xtlid = 0;
jfs_set_inode_flags(inode);
jfs_info("ialloc returns inode = 0x%p\n", inode);
return inode;
fail_drop:
dquot_drop(inode);
inode->i_flags |= S_NOQUOTA;
fail_unlock:
inode->i_nlink = 0;
unlock_new_inode(inode);
fail_put:
iput(inode);
fail:
return ERR_PTR(rc);
}
int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
{
int rc = 0;
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipbmap = sbi->ipbmap;
struct inode *ipbmap2;
struct inode *ipimap = sbi->ipimap;
struct jfs_log *log = sbi->log;
struct bmap *bmp = sbi->bmap;
s64 newLogAddress, newFSCKAddress;
int newFSCKSize;
s64 newMapSize = 0, mapSize;
s64 XAddress, XSize, nblocks, xoff, xaddr, t64;
s64 oldLVSize;
s64 newFSSize;
s64 VolumeSize;
int newNpages = 0, nPages, newPage, xlen, t32;
int tid;
int log_formatted = 0;
struct inode *iplist[1];
struct jfs_superblock *j_sb, *j_sb2;
s64 old_agsize;
int agsizechanged = 0;
struct buffer_head *bh, *bh2;
if (sbi->mntflag & JFS_INLINELOG)
oldLVSize = addressPXD(&sbi->logpxd) + lengthPXD(&sbi->logpxd);
else
oldLVSize = addressPXD(&sbi->fsckpxd) +
lengthPXD(&sbi->fsckpxd);
if (oldLVSize >= newLVSize) {
printk(KERN_WARNING
"jfs_extendfs: volume hasn't grown, returning\n");
goto out;
}
VolumeSize = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
if (VolumeSize) {
if (newLVSize > VolumeSize) {
printk(KERN_WARNING "jfs_extendfs: invalid size\n");
rc = -EINVAL;
goto out;
}
} else {
bh = sb_bread(sb, newLVSize - 1);
if (!bh) {
printk(KERN_WARNING "jfs_extendfs: invalid size\n");
rc = -EINVAL;
goto out;
}
bforget(bh);
}
if (isReadOnly(ipbmap)) {
printk(KERN_WARNING "jfs_extendfs: read-only file system\n");
rc = -EROFS;
goto out;
}
if ((sbi->mntflag & JFS_INLINELOG)) {
if (newLogSize == 0) {
newLogSize = newLVSize >> 8;
t32 = (1 << (20 - sbi->l2bsize)) - 1;
newLogSize = (newLogSize + t32) & ~t32;
newLogSize =
min(newLogSize, MEGABYTE32 >> sbi->l2bsize);
} else {
/*
* jfs_extendfs()
*
* function: extend file system;
*
* |-------------------------------|----------|----------|
* file system space fsck inline log
* workspace space
*
* input:
* new LVSize: in LV blocks (required)
* new LogSize: in LV blocks (optional)
* new FSSize: in LV blocks (optional)
*
* new configuration:
* 1. set new LogSize as specified or default from new LVSize;
* 2. compute new FSCKSize from new LVSize;
* 3. set new FSSize as MIN(FSSize, LVSize-(LogSize+FSCKSize)) where
* assert(new FSSize >= old FSSize),
* i.e., file system must not be shrinked;
*/
int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
{
int rc = 0;
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipbmap = sbi->ipbmap;
struct inode *ipbmap2;
struct inode *ipimap = sbi->ipimap;
struct jfs_log *log = sbi->log;
struct bmap *bmp = sbi->bmap;
s64 newLogAddress, newFSCKAddress;
int newFSCKSize;
s64 newMapSize = 0, mapSize;
s64 XAddress, XSize, nblocks, xoff, xaddr, t64;
s64 oldLVSize;
s64 newFSSize;
s64 VolumeSize;
int newNpages = 0, nPages, newPage, xlen, t32;
int tid;
int log_formatted = 0;
struct inode *iplist[1];
struct jfs_superblock *j_sb, *j_sb2;
uint old_agsize;
struct buffer_head *bh, *bh2;
/* If the volume hasn't grown, get out now */
if (sbi->mntflag & JFS_INLINELOG)
oldLVSize = addressPXD(&sbi->logpxd) + lengthPXD(&sbi->logpxd);
else
oldLVSize = addressPXD(&sbi->fsckpxd) +
lengthPXD(&sbi->fsckpxd);
if (oldLVSize >= newLVSize) {
printk(KERN_WARNING
"jfs_extendfs: volume hasn't grown, returning\n");
goto out;
}
VolumeSize = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
if (VolumeSize) {
if (newLVSize > VolumeSize) {
printk(KERN_WARNING "jfs_extendfs: invalid size\n");
rc = -EINVAL;
goto out;
}
} else {
/* check the device */
bh = sb_bread(sb, newLVSize - 1);
if (!bh) {
printk(KERN_WARNING "jfs_extendfs: invalid size\n");
rc = -EINVAL;
goto out;
}
bforget(bh);
}
/* Can't extend write-protected drive */
if (isReadOnly(ipbmap)) {
printk(KERN_WARNING "jfs_extendfs: read-only file system\n");
rc = -EROFS;
goto out;
}
/*
* reconfigure LV spaces
* ---------------------
*
* validate new size, or, if not specified, determine new size
*/
/*
* reconfigure inline log space:
*/
if ((sbi->mntflag & JFS_INLINELOG)) {
if (newLogSize == 0) {
/*
* no size specified: default to 1/256 of aggregate
* size; rounded up to a megabyte boundary;
*/
newLogSize = newLVSize >> 8;
t32 = (1 << (20 - sbi->l2bsize)) - 1;
newLogSize = (newLogSize + t32) & ~t32;
newLogSize =
min(newLogSize, MEGABYTE32 >> sbi->l2bsize);
} else {
/*
* NAME: jfs_umount(vfsp, flags, crp)
*
* FUNCTION: vfs_umount()
*
* PARAMETERS: vfsp - virtual file system pointer
* flags - unmount for shutdown
* crp - credential
*
* RETURN : EBUSY - device has open files
*/
int jfs_umount(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipbmap = sbi->ipbmap;
struct inode *ipimap = sbi->ipimap;
struct inode *ipaimap = sbi->ipaimap;
struct inode *ipaimap2 = sbi->ipaimap2;
struct jfs_log *log;
int rc = 0;
jfs_info("UnMount JFS: sb:0x%p", sb);
/*
* update superblock and close log
*
* if mounted read-write and log based recovery was enabled
*/
if ((log = sbi->log))
/*
* Wait for outstanding transactions to be written to log:
*/
jfs_flush_journal(log, 1);
/*
* close fileset inode allocation map (aka fileset inode)
*/
diUnmount(ipimap, 0);
diFreeSpecial(ipimap);
sbi->ipimap = NULL;
/*
* close secondary aggregate inode allocation map
*/
ipaimap2 = sbi->ipaimap2;
if (ipaimap2) {
diUnmount(ipaimap2, 0);
diFreeSpecial(ipaimap2);
sbi->ipaimap2 = NULL;
}
/*
* close aggregate inode allocation map
*/
ipaimap = sbi->ipaimap;
diUnmount(ipaimap, 0);
diFreeSpecial(ipaimap);
sbi->ipaimap = NULL;
/*
* close aggregate block allocation map
*/
dbUnmount(ipbmap, 0);
diFreeSpecial(ipbmap);
sbi->ipimap = NULL;
/*
* Make sure all metadata makes it to disk before we mark
* the superblock as clean
*/
filemap_write_and_wait(sbi->direct_inode->i_mapping);
/*
* ensure all file system file pages are propagated to their
* home blocks on disk (and their in-memory buffer pages are
* invalidated) BEFORE updating file system superblock state
* (to signify file system is unmounted cleanly, and thus in
* consistent state) and log superblock active file system
* list (to signify skip logredo()).
*/
if (log) { /* log = NULL if read-only mount */
updateSuper(sb, FM_CLEAN);
/*
* close log:
*
* remove file system from log active file system list.
*/
rc = lmLogClose(sb);
}
jfs_info("UnMount JFS Complete: rc = %d", rc);
return rc;
}
