#include <linux/fs.h>
#include <linux/module.h>
#include <linux/completion.h>
#include <linux/vfs.h>
#include <linux/quotaops.h>
#include <linux/fs_context.h>
#include <linux/fs_parser.h>
#include <linux/moduleparam.h>
#include <linux/kthread.h>
#include <linux/posix_acl.h>
#include <linux/buffer_head.h>
#include <linux/exportfs.h>
#include <linux/crc32.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/seq_file.h>
#include <linux/blkdev.h>
#include "jfs_incore.h"
#include "jfs_filsys.h"
#include "jfs_inode.h"
#include "jfs_metapage.h"
#include "jfs_superblock.h"
#include "jfs_dmap.h"
#include "jfs_imap.h"
#include "jfs_acl.h"
#include "jfs_debug.h"
#include "jfs_xattr.h"
#include "jfs_dinode.h"
MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
MODULE_LICENSE("GPL");
static struct kmem_cache *jfs_inode_cachep;
static const struct super_operations jfs_super_operations;
static const struct export_operations jfs_export_operations;
static struct file_system_type jfs_fs_type;
#define MAX_COMMIT_THREADS 64
static int commit_threads;
module_param(commit_threads, int, 0);
MODULE_PARM_DESC(commit_threads, "Number of commit threads");
static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
struct task_struct *jfsIOthread;
struct task_struct *jfsSyncThread;
#ifdef CONFIG_JFS_DEBUG
int jfsloglevel = JFS_LOGLEVEL_WARN;
module_param(jfsloglevel, int, 0644);
MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
#endif
static void jfs_handle_error(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
if (sb_rdonly(sb))
return;
updateSuper(sb, FM_DIRTY);
if (sbi->flag & JFS_ERR_PANIC)
panic("JFS (device %s): panic forced after error\n",
sb->s_id);
else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
jfs_err("ERROR: (device %s): remounting filesystem as read-only",
sb->s_id);
sb->s_flags |= SB_RDONLY;
}
}
void jfs_error(struct super_block *sb, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
pr_err("ERROR: (device %s): %ps: %pV\n",
sb->s_id, __builtin_return_address(0), &vaf);
va_end(args);
jfs_handle_error(sb);
}
static struct inode *jfs_alloc_inode(struct super_block *sb)
{
struct jfs_inode_info *jfs_inode;
jfs_inode = alloc_inode_sb(sb, jfs_inode_cachep, GFP_NOFS);
if (!jfs_inode)
return NULL;
#ifdef CONFIG_QUOTA
memset(&jfs_inode->i_dquot, 0, sizeof(jfs_inode->i_dquot));
#endif
return &jfs_inode->vfs_inode;
}
static void jfs_free_inode(struct inode *inode)
{
kmem_cache_free(jfs_inode_cachep, JFS_IP(inode));
}
static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb);
s64 maxinodes;
struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
jfs_info("In jfs_statfs");
buf->f_type = JFS_SUPER_MAGIC;
buf->f_bsize = sbi->bsize;
buf->f_blocks = sbi->bmap->db_mapsize;
buf->f_bfree = sbi->bmap->db_nfree;
buf->f_bavail = sbi->bmap->db_nfree;
maxinodes = min((s64) atomic_read(&imap->im_numinos) +
((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
<< L2INOSPEREXT), (s64) 0xffffffffLL);
buf->f_files = maxinodes;
buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
atomic_read(&imap->im_numfree));
buf->f_fsid.val[0] = crc32_le(0, (char *)&sbi->uuid,
sizeof(sbi->uuid)/2);
buf->f_fsid.val[1] = crc32_le(0,
(char *)&sbi->uuid + sizeof(sbi->uuid)/2,
sizeof(sbi->uuid)/2);
buf->f_namelen = JFS_NAME_MAX;
return 0;
}
#ifdef CONFIG_QUOTA
static int jfs_quota_off(struct super_block *sb, int type);
static int jfs_quota_on(struct super_block *sb, int type, int format_id,
const struct path *path);
static void jfs_quota_off_umount(struct super_block *sb)
{
int type;
for (type = 0; type < MAXQUOTAS; type++)
jfs_quota_off(sb, type);
}
static const struct quotactl_ops jfs_quotactl_ops = {
.quota_on = jfs_quota_on,
.quota_off = jfs_quota_off,
.quota_sync = dquot_quota_sync,
.get_state = dquot_get_state,
.set_info = dquot_set_dqinfo,
.get_dqblk = dquot_get_dqblk,
.set_dqblk = dquot_set_dqblk,
.get_nextdqblk = dquot_get_next_dqblk,
};
#else
static inline void jfs_quota_off_umount(struct super_block *sb)
{
}
#endif
static void jfs_put_super(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
int rc;
jfs_info("In jfs_put_super");
jfs_quota_off_umount(sb);
rc = jfs_umount(sb);
if (rc)
jfs_err("jfs_umount failed with return code %d", rc);
unload_nls(sbi->nls_tab);
truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
iput(sbi->direct_inode);
kfree(sbi);
}
enum {
Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask,
Opt_discard, Opt_nodiscard, Opt_discard_minblk
};
static const struct constant_table jfs_param_errors[] = {
{"continue", JFS_ERR_CONTINUE},
{"remount-ro", JFS_ERR_REMOUNT_RO},
{"panic", JFS_ERR_PANIC},
{}
};
static const struct fs_parameter_spec jfs_param_spec[] = {
fsparam_flag_no ("integrity", Opt_integrity),
fsparam_string ("iocharset", Opt_iocharset),
fsparam_u64 ("resize", Opt_resize),
fsparam_flag ("resize", Opt_resize_nosize),
fsparam_enum ("errors", Opt_errors, jfs_param_errors),
fsparam_flag ("quota", Opt_quota),
fsparam_flag ("noquota", Opt_ignore),
fsparam_flag ("usrquota", Opt_usrquota),
fsparam_flag ("grpquota", Opt_grpquota),
fsparam_uid ("uid", Opt_uid),
fsparam_gid ("gid", Opt_gid),
fsparam_u32oct ("umask", Opt_umask),
fsparam_flag ("discard", Opt_discard),
fsparam_u32 ("discard", Opt_discard_minblk),
fsparam_flag ("nodiscard", Opt_nodiscard),
{}
};
struct jfs_context {
int flag;
kuid_t uid;
kgid_t gid;
uint umask;
uint minblks_trim;
void *nls_map;
bool resize;
s64 newLVSize;
};
static int jfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
{
struct jfs_context *ctx = fc->fs_private;
int reconfigure = (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE);
struct fs_parse_result result;
struct nls_table *nls_map;
int opt;
opt = fs_parse(fc, jfs_param_spec, param, &result);
if (opt < 0)
return opt;
switch (opt) {
case Opt_integrity:
if (result.negated)
ctx->flag |= JFS_NOINTEGRITY;
else
ctx->flag &= ~JFS_NOINTEGRITY;
break;
case Opt_ignore:
break;
case Opt_iocharset:
if (ctx->nls_map && ctx->nls_map != (void *) -1) {
unload_nls(ctx->nls_map);
ctx->nls_map = NULL;
}
if (!strcmp(param->string, "none"))
ctx->nls_map = NULL;
else {
nls_map = load_nls(param->string);
if (!nls_map) {
pr_err("JFS: charset not found\n");
return -EINVAL;
}
ctx->nls_map = nls_map;
}
break;
case Opt_resize:
if (!reconfigure)
return -EINVAL;
ctx->resize = true;
ctx->newLVSize = result.uint_64;
break;
case Opt_resize_nosize:
if (!reconfigure)
return -EINVAL;
ctx->resize = true;
break;
case Opt_errors:
ctx->flag &= ~JFS_ERR_MASK;
ctx->flag |= result.uint_32;
break;
#ifdef CONFIG_QUOTA
case Opt_quota:
case Opt_usrquota:
ctx->flag |= JFS_USRQUOTA;
break;
case Opt_grpquota:
ctx->flag |= JFS_GRPQUOTA;
break;
#else
case Opt_usrquota:
case Opt_grpquota:
case Opt_quota:
pr_err("JFS: quota operations not supported\n");
break;
#endif
case Opt_uid:
ctx->uid = result.uid;
break;
case Opt_gid:
ctx->gid = result.gid;
break;
case Opt_umask:
if (result.uint_32 & ~0777) {
pr_err("JFS: Invalid value of umask\n");
return -EINVAL;
}
ctx->umask = result.uint_32;
break;
case Opt_discard:
ctx->minblks_trim = 64;
ctx->flag |= JFS_DISCARD;
break;
case Opt_nodiscard:
ctx->flag &= ~JFS_DISCARD;
break;
case Opt_discard_minblk:
ctx->minblks_trim = result.uint_32;
ctx->flag |= JFS_DISCARD;
break;
default:
return -EINVAL;
}
return 0;
}
static int jfs_reconfigure(struct fs_context *fc)
{
struct jfs_context *ctx = fc->fs_private;
struct super_block *sb = fc->root->d_sb;
int readonly = fc->sb_flags & SB_RDONLY;
int rc = 0;
int flag = ctx->flag;
int ret;
sync_filesystem(sb);
JFS_SBI(sb)->flag = ctx->flag;
JFS_SBI(sb)->uid = ctx->uid;
JFS_SBI(sb)->gid = ctx->gid;
JFS_SBI(sb)->umask = ctx->umask;
JFS_SBI(sb)->minblks_trim = ctx->minblks_trim;
if (ctx->nls_map != (void *) -1) {
unload_nls(JFS_SBI(sb)->nls_tab);
JFS_SBI(sb)->nls_tab = ctx->nls_map;
}
ctx->nls_map = NULL;
if (ctx->resize) {
if (sb_rdonly(sb)) {
pr_err("JFS: resize requires volume to be mounted read-write\n");
return -EROFS;
}
if (!ctx->newLVSize) {
ctx->newLVSize = sb_bdev_nr_blocks(sb);
if (ctx->newLVSize == 0)
pr_err("JFS: Cannot determine volume size\n");
}
rc = jfs_extendfs(sb, ctx->newLVSize, 0);
if (rc)
return rc;
}
if (sb_rdonly(sb) && !readonly) {
truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
JFS_SBI(sb)->flag = flag;
ret = jfs_mount_rw(sb, 1);
sb->s_flags &= ~SB_RDONLY;
dquot_resume(sb, -1);
return ret;
}
if (!sb_rdonly(sb) && readonly) {
rc = dquot_suspend(sb, -1);
if (rc < 0)
return rc;
rc = jfs_umount_rw(sb);
JFS_SBI(sb)->flag = flag;
return rc;
}
if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) {
if (!sb_rdonly(sb)) {
rc = jfs_umount_rw(sb);
if (rc)
return rc;
JFS_SBI(sb)->flag = flag;
ret = jfs_mount_rw(sb, 1);
return ret;
}
}
JFS_SBI(sb)->flag = flag;
return 0;
}
static int jfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct jfs_context *ctx = fc->fs_private;
int silent = fc->sb_flags & SB_SILENT;
struct jfs_sb_info *sbi;
struct inode *inode;
int rc;
int ret = -EINVAL;
jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
sbi = kzalloc_obj(struct jfs_sb_info);
if (!sbi)
return -ENOMEM;
sb->s_fs_info = sbi;
sb->s_max_links = JFS_LINK_MAX;
sb->s_time_min = 0;
sb->s_time_max = U32_MAX;
sbi->sb = sb;
sbi->flag = ctx->flag;
sbi->uid = ctx->uid;
sbi->gid = ctx->gid;
sbi->umask = ctx->umask;
if (ctx->nls_map != (void *) -1) {
unload_nls(sbi->nls_tab);
sbi->nls_tab = ctx->nls_map;
}
ctx->nls_map = NULL;
if (sbi->flag & JFS_DISCARD) {
if (!bdev_max_discard_sectors(sb->s_bdev)) {
pr_err("JFS: discard option not supported on device\n");
sbi->flag &= ~JFS_DISCARD;
} else {
sbi->minblks_trim = ctx->minblks_trim;
}
}
#ifdef CONFIG_JFS_POSIX_ACL
sb->s_flags |= SB_POSIXACL;
#endif
if (ctx->resize) {
pr_err("resize option for remount only\n");
goto out_unload;
}
sb_set_blocksize(sb, PSIZE);
sb->s_op = &jfs_super_operations;
sb->s_export_op = &jfs_export_operations;
sb->s_xattr = jfs_xattr_handlers;
#ifdef CONFIG_QUOTA
sb->dq_op = &dquot_operations;
sb->s_qcop = &jfs_quotactl_ops;
sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
#endif
inode = new_inode(sb);
if (inode == NULL) {
ret = -ENOMEM;
goto out_unload;
}
inode->i_size = bdev_nr_bytes(sb->s_bdev);
inode->i_mapping->a_ops = &jfs_metapage_aops;
inode_fake_hash(inode);
mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
sbi->direct_inode = inode;
rc = jfs_mount(sb);
if (rc) {
if (!silent)
jfs_err("jfs_mount failed w/return code = %d", rc);
goto out_mount_failed;
}
if (sb_rdonly(sb))
sbi->log = NULL;
else {
rc = jfs_mount_rw(sb, 0);
if (rc) {
if (!silent) {
jfs_err("jfs_mount_rw failed, return code = %d",
rc);
}
goto out_no_rw;
}
}
sb->s_magic = JFS_SUPER_MAGIC;
if (sbi->mntflag & JFS_OS2)
set_default_d_op(sb, &jfs_ci_dentry_operations);
inode = jfs_iget(sb, ROOT_I);
if (IS_ERR(inode)) {
ret = PTR_ERR(inode);
goto out_no_rw;
}
sb->s_root = d_make_root(inode);
if (!sb->s_root)
goto out_no_root;
sb->s_maxbytes = min(((loff_t)sb->s_blocksize) << 40, MAX_LFS_FILESIZE);
sb->s_time_gran = 1;
return 0;
out_no_root:
jfs_err("jfs_read_super: get root dentry failed");
out_no_rw:
rc = jfs_umount(sb);
if (rc)
jfs_err("jfs_umount failed with return code %d", rc);
out_mount_failed:
filemap_write_and_wait(sbi->direct_inode->i_mapping);
truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
make_bad_inode(sbi->direct_inode);
iput(sbi->direct_inode);
sbi->direct_inode = NULL;
out_unload:
unload_nls(sbi->nls_tab);
kfree(sbi);
return ret;
}
static int jfs_freeze(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct jfs_log *log = sbi->log;
int rc = 0;
if (!sb_rdonly(sb)) {
txQuiesce(sb);
rc = lmLogShutdown(log);
if (rc) {
jfs_error(sb, "lmLogShutdown failed\n");
txResume(sb);
return rc;
}
rc = updateSuper(sb, FM_CLEAN);
if (rc) {
jfs_err("jfs_freeze: updateSuper failed");
}
}
return 0;
}
static int jfs_unfreeze(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct jfs_log *log = sbi->log;
int rc = 0;
if (!sb_rdonly(sb)) {
rc = updateSuper(sb, FM_MOUNT);
if (rc) {
jfs_error(sb, "updateSuper failed\n");
goto out;
}
rc = lmLogInit(log);
if (rc)
jfs_error(sb, "lmLogInit failed\n");
out:
txResume(sb);
}
return rc;
}
static int jfs_get_tree(struct fs_context *fc)
{
return get_tree_bdev(fc, jfs_fill_super);
}
static int jfs_sync_fs(struct super_block *sb, int wait)
{
struct jfs_log *log = JFS_SBI(sb)->log;
if (log) {
dquot_writeback_dquots(sb, -1);
jfs_flush_journal(log, wait);
jfs_syncpt(log, 0);
}
return 0;
}
static int jfs_show_options(struct seq_file *seq, struct dentry *root)
{
struct jfs_sb_info *sbi = JFS_SBI(root->d_sb);
if (uid_valid(sbi->uid))
seq_printf(seq, ",uid=%d", from_kuid(&init_user_ns, sbi->uid));
if (gid_valid(sbi->gid))
seq_printf(seq, ",gid=%d", from_kgid(&init_user_ns, sbi->gid));
if (sbi->umask != -1)
seq_printf(seq, ",umask=%03o", sbi->umask);
if (sbi->flag & JFS_NOINTEGRITY)
seq_puts(seq, ",nointegrity");
if (sbi->flag & JFS_DISCARD)
seq_printf(seq, ",discard=%u", sbi->minblks_trim);
if (sbi->nls_tab)
seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset);
if (sbi->flag & JFS_ERR_CONTINUE)
seq_printf(seq, ",errors=continue");
if (sbi->flag & JFS_ERR_PANIC)
seq_printf(seq, ",errors=panic");
#ifdef CONFIG_QUOTA
if (sbi->flag & JFS_USRQUOTA)
seq_puts(seq, ",usrquota");
if (sbi->flag & JFS_GRPQUOTA)
seq_puts(seq, ",grpquota");
#endif
return 0;
}
#ifdef CONFIG_QUOTA
static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data,
size_t len, loff_t off)
{
struct inode *inode = sb_dqopt(sb)->files[type];
sector_t blk = off >> sb->s_blocksize_bits;
int err = 0;
int offset = off & (sb->s_blocksize - 1);
int tocopy;
size_t toread;
struct buffer_head tmp_bh;
struct buffer_head *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 = min_t(size_t, sb->s_blocksize - offset, toread);
tmp_bh.b_state = 0;
tmp_bh.b_size = i_blocksize(inode);
err = jfs_get_block(inode, blk, &tmp_bh, 0);
if (err)
return err;
if (!buffer_mapped(&tmp_bh))
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;
}
static ssize_t jfs_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];
sector_t blk = off >> sb->s_blocksize_bits;
int err = 0;
int offset = off & (sb->s_blocksize - 1);
int tocopy;
size_t towrite = len;
struct buffer_head tmp_bh;
struct buffer_head *bh;
inode_lock(inode);
while (towrite > 0) {
tocopy = min_t(size_t, sb->s_blocksize - offset, towrite);
tmp_bh.b_state = 0;
tmp_bh.b_size = i_blocksize(inode);
err = jfs_get_block(inode, blk, &tmp_bh, 1);
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_folio(bh->b_folio);
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
unlock_buffer(bh);
brelse(bh);
offset = 0;
towrite -= tocopy;
data += tocopy;
blk++;
}
out:
if (len == towrite) {
inode_unlock(inode);
return err;
}
if (inode->i_size < off+len-towrite)
i_size_write(inode, off+len-towrite);
inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
mark_inode_dirty(inode);
inode_unlock(inode);
return len - towrite;
}
static struct dquot __rcu **jfs_get_dquots(struct inode *inode)
{
return JFS_IP(inode)->i_dquot;
}
static int jfs_quota_on(struct super_block *sb, int type, int format_id,
const struct path *path)
{
int err;
struct inode *inode;
err = dquot_quota_on(sb, type, format_id, path);
if (err)
return err;
inode = d_inode(path->dentry);
inode_lock(inode);
JFS_IP(inode)->mode2 |= JFS_NOATIME_FL | JFS_IMMUTABLE_FL;
inode_set_flags(inode, S_NOATIME | S_IMMUTABLE,
S_NOATIME | S_IMMUTABLE);
inode_unlock(inode);
mark_inode_dirty(inode);
return 0;
}
static int jfs_quota_off(struct super_block *sb, int type)
{
struct inode *inode = sb_dqopt(sb)->files[type];
int err;
if (!inode || !igrab(inode))
goto out;
err = dquot_quota_off(sb, type);
if (err)
goto out_put;
inode_lock(inode);
JFS_IP(inode)->mode2 &= ~(JFS_NOATIME_FL | JFS_IMMUTABLE_FL);
inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE);
inode_unlock(inode);
mark_inode_dirty(inode);
out_put:
iput(inode);
return err;
out:
return dquot_quota_off(sb, type);
}
#endif
static const struct super_operations jfs_super_operations = {
.alloc_inode = jfs_alloc_inode,
.free_inode = jfs_free_inode,
.dirty_inode = jfs_dirty_inode,
.write_inode = jfs_write_inode,
.evict_inode = jfs_evict_inode,
.put_super = jfs_put_super,
.sync_fs = jfs_sync_fs,
.freeze_fs = jfs_freeze,
.unfreeze_fs = jfs_unfreeze,
.statfs = jfs_statfs,
.show_options = jfs_show_options,
#ifdef CONFIG_QUOTA
.quota_read = jfs_quota_read,
.quota_write = jfs_quota_write,
.get_dquots = jfs_get_dquots,
#endif
};
static const struct export_operations jfs_export_operations = {
.encode_fh = generic_encode_ino32_fh,
.fh_to_dentry = jfs_fh_to_dentry,
.fh_to_parent = jfs_fh_to_parent,
.get_parent = jfs_get_parent,
};
static void jfs_init_options(struct fs_context *fc, struct jfs_context *ctx)
{
if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
struct super_block *sb = fc->root->d_sb;
ctx->uid = JFS_SBI(sb)->uid;
ctx->gid = JFS_SBI(sb)->gid;
ctx->umask = JFS_SBI(sb)->umask;
ctx->nls_map = (void *)-1;
ctx->minblks_trim = JFS_SBI(sb)->minblks_trim;
ctx->flag = JFS_SBI(sb)->flag;
} else {
ctx->flag = JFS_ERR_REMOUNT_RO;
ctx->uid = INVALID_UID;
ctx->gid = INVALID_GID;
ctx->umask = -1;
ctx->nls_map = (void *)-1;
}
}
static void jfs_free_fc(struct fs_context *fc)
{
struct jfs_context *ctx = fc->fs_private;
if (ctx->nls_map != (void *) -1)
unload_nls(ctx->nls_map);
kfree(ctx);
}
static const struct fs_context_operations jfs_context_ops = {
.parse_param = jfs_parse_param,
.get_tree = jfs_get_tree,
.reconfigure = jfs_reconfigure,
.free = jfs_free_fc,
};
static int jfs_init_fs_context(struct fs_context *fc)
{
struct jfs_context *ctx;
ctx = kzalloc_obj(*ctx);
if (!ctx)
return -ENOMEM;
jfs_init_options(fc, ctx);
fc->fs_private = ctx;
fc->ops = &jfs_context_ops;
return 0;
}
static struct file_system_type jfs_fs_type = {
.owner = THIS_MODULE,
.name = "jfs",
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
.init_fs_context = jfs_init_fs_context,
.parameters = jfs_param_spec,
};
MODULE_ALIAS_FS("jfs");
static void init_once(void *foo)
{
struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
init_rwsem(&jfs_ip->rdwrlock);
mutex_init(&jfs_ip->commit_mutex);
init_rwsem(&jfs_ip->xattr_sem);
spin_lock_init(&jfs_ip->ag_lock);
jfs_ip->active_ag = -1;
inode_init_once(&jfs_ip->vfs_inode);
}
static int __init init_jfs_fs(void)
{
int i;
int rc;
jfs_inode_cachep =
kmem_cache_create_usercopy("jfs_ip", sizeof(struct jfs_inode_info),
0, SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT,
offsetof(struct jfs_inode_info, i_inline_all),
sizeof_field(struct jfs_inode_info, i_inline_all),
init_once);
if (jfs_inode_cachep == NULL)
return -ENOMEM;
rc = metapage_init();
if (rc) {
jfs_err("metapage_init failed w/rc = %d", rc);
goto free_slab;
}
rc = txInit();
if (rc) {
jfs_err("txInit failed w/rc = %d", rc);
goto free_metapage;
}
jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO");
if (IS_ERR(jfsIOthread)) {
rc = PTR_ERR(jfsIOthread);
jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
goto end_txmngr;
}
if (commit_threads < 1)
commit_threads = num_online_cpus();
if (commit_threads > MAX_COMMIT_THREADS)
commit_threads = MAX_COMMIT_THREADS;
for (i = 0; i < commit_threads; i++) {
jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL,
"jfsCommit");
if (IS_ERR(jfsCommitThread[i])) {
rc = PTR_ERR(jfsCommitThread[i]);
jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
commit_threads = i;
goto kill_committask;
}
}
jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync");
if (IS_ERR(jfsSyncThread)) {
rc = PTR_ERR(jfsSyncThread);
jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
goto kill_committask;
}
#ifdef PROC_FS_JFS
jfs_proc_init();
#endif
rc = register_filesystem(&jfs_fs_type);
if (!rc)
return 0;
#ifdef PROC_FS_JFS
jfs_proc_clean();
#endif
kthread_stop(jfsSyncThread);
kill_committask:
for (i = 0; i < commit_threads; i++)
kthread_stop(jfsCommitThread[i]);
kthread_stop(jfsIOthread);
end_txmngr:
txExit();
free_metapage:
metapage_exit();
free_slab:
kmem_cache_destroy(jfs_inode_cachep);
return rc;
}
static void __exit exit_jfs_fs(void)
{
int i;
jfs_info("exit_jfs_fs called");
txExit();
metapage_exit();
kthread_stop(jfsIOthread);
for (i = 0; i < commit_threads; i++)
kthread_stop(jfsCommitThread[i]);
kthread_stop(jfsSyncThread);
#ifdef PROC_FS_JFS
jfs_proc_clean();
#endif
unregister_filesystem(&jfs_fs_type);
rcu_barrier();
kmem_cache_destroy(jfs_inode_cachep);
}
module_init(init_jfs_fs)
module_exit(exit_jfs_fs)
