void
mode_to_prot(struct inode *inode)
{
u32 prot = AFFS_I(inode)->i_protect;
mode_t mode = inode->i_mode;
if (!(mode & S_IXUSR))
prot |= FIBF_NOEXECUTE;
if (!(mode & S_IRUSR))
prot |= FIBF_NOREAD;
if (!(mode & S_IWUSR))
prot |= FIBF_NOWRITE;
if (mode & S_IXGRP)
prot |= FIBF_GRP_EXECUTE;
if (mode & S_IRGRP)
prot |= FIBF_GRP_READ;
if (mode & S_IWGRP)
prot |= FIBF_GRP_WRITE;
if (mode & S_IXOTH)
prot |= FIBF_OTR_EXECUTE;
if (mode & S_IROTH)
prot |= FIBF_OTR_READ;
if (mode & S_IWOTH)
prot |= FIBF_OTR_WRITE;
AFFS_I(inode)->i_protect = prot;
}
void
affs_drop_inode(struct inode *inode)
{
mutex_lock(&inode->i_mutex);
if (inode->i_size != AFFS_I(inode)->mmu_private)
affs_truncate(inode);
mutex_unlock(&inode->i_mutex);
generic_drop_inode(inode);
}
void
affs_put_inode(struct inode *inode)
{
pr_debug("AFFS: put_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
affs_free_prealloc(inode);
if (atomic_read(&inode->i_count) == 1) {
down(&inode->i_sem);
if (inode->i_size != AFFS_I(inode)->mmu_private)
affs_truncate(inode);
up(&inode->i_sem);
}
}
void
affs_evict_inode(struct inode *inode)
{
unsigned long cache_page;
pr_debug("AFFS: evict_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
truncate_inode_pages(&inode->i_data, 0);
if (!inode->i_nlink) {
inode->i_size = 0;
affs_truncate(inode);
}
invalidate_inode_buffers(inode);
end_writeback(inode);
affs_free_prealloc(inode);
cache_page = (unsigned long)AFFS_I(inode)->i_lc;
if (cache_page) {
pr_debug("AFFS: freeing ext cache\n");
AFFS_I(inode)->i_lc = NULL;
AFFS_I(inode)->i_ac = NULL;
free_page(cache_page);
}
affs_brelse(AFFS_I(inode)->i_ext_bh);
AFFS_I(inode)->i_ext_last = ~1;
AFFS_I(inode)->i_ext_bh = NULL;
if (!inode->i_nlink)
affs_free_block(inode->i_sb, inode->i_ino);
}
int
affs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
struct super_block *sb = inode->i_sb;
struct buffer_head *bh;
struct affs_tail *tail;
uid_t uid;
gid_t gid;
pr_debug("write_inode(%lu)\n", inode->i_ino);
if (!inode->i_nlink)
// possibly free block
return 0;
bh = affs_bread(sb, inode->i_ino);
if (!bh) {
affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
return -EIO;
}
tail = AFFS_TAIL(sb, bh);
if (tail->stype == cpu_to_be32(ST_ROOT)) {
affs_secs_to_datestamp(inode->i_mtime.tv_sec,
&AFFS_ROOT_TAIL(sb, bh)->root_change);
} else {
tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
tail->size = cpu_to_be32(inode->i_size);
affs_secs_to_datestamp(inode->i_mtime.tv_sec, &tail->change);
if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
uid = i_uid_read(inode);
gid = i_gid_read(inode);
if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_MUFS)) {
if (uid == 0 || uid == 0xFFFF)
uid = uid ^ ~0;
if (gid == 0 || gid == 0xFFFF)
gid = gid ^ ~0;
}
if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETUID))
tail->uid = cpu_to_be16(uid);
if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETGID))
tail->gid = cpu_to_be16(gid);
}
}
affs_fix_checksum(sb, bh);
mark_buffer_dirty_inode(bh, inode);
affs_brelse(bh);
affs_free_prealloc(inode);
return 0;
}
void
affs_clear_inode(struct inode *inode)
{
unsigned long cache_page = (unsigned long) AFFS_I(inode)->i_lc;
pr_debug("AFFS: clear_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
if (cache_page) {
pr_debug("AFFS: freeing ext cache\n");
AFFS_I(inode)->i_lc = NULL;
AFFS_I(inode)->i_ac = NULL;
free_page(cache_page);
}
affs_brelse(AFFS_I(inode)->i_ext_bh);
AFFS_I(inode)->i_ext_last = ~1;
AFFS_I(inode)->i_ext_bh = NULL;
}
static void affs_destroy_inode(struct inode *inode)
{
kmem_cache_free(affs_inode_cachep, AFFS_I(inode));
}
static void affs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
kmem_cache_free(affs_inode_cachep, AFFS_I(inode));
}
struct inode *
affs_new_inode(struct inode *dir)
{
struct super_block *sb = dir->i_sb;
struct inode *inode;
u32 block;
struct buffer_head *bh;
if (!(inode = new_inode(sb)))
goto err_inode;
if (!(block = affs_alloc_block(dir, dir->i_ino)))
goto err_block;
bh = affs_getzeroblk(sb, block);
if (!bh)
goto err_bh;
mark_buffer_dirty_inode(bh, inode);
affs_brelse(bh);
inode->i_uid = current_fsuid();
inode->i_gid = current_fsgid();
inode->i_ino = block;
inode->i_nlink = 1;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
atomic_set(&AFFS_I(inode)->i_opencnt, 0);
AFFS_I(inode)->i_blkcnt = 0;
AFFS_I(inode)->i_lc = NULL;
AFFS_I(inode)->i_lc_size = 0;
AFFS_I(inode)->i_lc_shift = 0;
AFFS_I(inode)->i_lc_mask = 0;
AFFS_I(inode)->i_ac = NULL;
AFFS_I(inode)->i_ext_bh = NULL;
AFFS_I(inode)->mmu_private = 0;
AFFS_I(inode)->i_protect = 0;
AFFS_I(inode)->i_lastalloc = 0;
AFFS_I(inode)->i_pa_cnt = 0;
AFFS_I(inode)->i_extcnt = 1;
AFFS_I(inode)->i_ext_last = ~1;
insert_inode_hash(inode);
return inode;
err_bh:
affs_free_block(sb, block);
err_block:
iput(inode);
err_inode:
return NULL;
}
struct inode *affs_iget(struct super_block *sb, unsigned long ino)
{
struct affs_sb_info *sbi = AFFS_SB(sb);
struct buffer_head *bh;
// struct affs_head *head;
struct affs_tail *tail;
struct inode *inode;
u32 block;
u32 size;
u32 prot;
u16 id;
inode = iget_locked(sb, ino);
if (!inode)
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
return inode;
pr_debug("AFFS: affs_iget(%lu)\n", inode->i_ino);
block = inode->i_ino;
bh = affs_bread(sb, block);
if (!bh) {
affs_warning(sb, "read_inode", "Cannot read block %d", block);
goto bad_inode;
}
if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
affs_warning(sb,"read_inode",
"Checksum or type (ptype=%d) error on inode %d",
AFFS_HEAD(bh)->ptype, block);
goto bad_inode;
}
// head = AFFS_HEAD(bh);
tail = AFFS_TAIL(sb, bh);
prot = be32_to_cpu(tail->protect);
inode->i_size = 0;
inode->i_nlink = 1;
inode->i_mode = 0;
AFFS_I(inode)->i_extcnt = 1;
AFFS_I(inode)->i_ext_last = ~1;
AFFS_I(inode)->i_protect = prot;
atomic_set(&AFFS_I(inode)->i_opencnt, 0);
AFFS_I(inode)->i_blkcnt = 0;
AFFS_I(inode)->i_lc = NULL;
AFFS_I(inode)->i_lc_size = 0;
AFFS_I(inode)->i_lc_shift = 0;
AFFS_I(inode)->i_lc_mask = 0;
AFFS_I(inode)->i_ac = NULL;
AFFS_I(inode)->i_ext_bh = NULL;
AFFS_I(inode)->mmu_private = 0;
AFFS_I(inode)->i_lastalloc = 0;
AFFS_I(inode)->i_pa_cnt = 0;
if (sbi->s_flags & SF_SETMODE)
inode->i_mode = sbi->s_mode;
else
inode->i_mode = prot_to_mode(prot);
id = be16_to_cpu(tail->uid);
if (id == 0 || sbi->s_flags & SF_SETUID)
inode->i_uid = sbi->s_uid;
else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
inode->i_uid = 0;
else
inode->i_uid = id;
id = be16_to_cpu(tail->gid);
if (id == 0 || sbi->s_flags & SF_SETGID)
inode->i_gid = sbi->s_gid;
else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
inode->i_gid = 0;
else
inode->i_gid = id;
switch (be32_to_cpu(tail->stype)) {
case ST_ROOT:
inode->i_uid = sbi->s_uid;
inode->i_gid = sbi->s_gid;
/* fall through */
case ST_USERDIR:
if (be32_to_cpu(tail->stype) == ST_USERDIR ||
sbi->s_flags & SF_SETMODE) {
if (inode->i_mode & S_IRUSR)
inode->i_mode |= S_IXUSR;
if (inode->i_mode & S_IRGRP)
inode->i_mode |= S_IXGRP;
if (inode->i_mode & S_IROTH)
inode->i_mode |= S_IXOTH;
inode->i_mode |= S_IFDIR;
} else
inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR;
/* Maybe it should be controlled by mount parameter? */
//inode->i_mode |= S_ISVTX;
inode->i_op = &affs_dir_inode_operations;
inode->i_fop = &affs_dir_operations;
break;
case ST_LINKDIR:
#if 0
affs_warning(sb, "read_inode", "inode is LINKDIR");
goto bad_inode;
#else
inode->i_mode |= S_IFDIR;
/* ... and leave ->i_op and ->i_fop pointing to empty */
break;
#endif
case ST_LINKFILE:
affs_warning(sb, "read_inode", "inode is LINKFILE");
goto bad_inode;
case ST_FILE:
size = be32_to_cpu(tail->size);
inode->i_mode |= S_IFREG;
AFFS_I(inode)->mmu_private = inode->i_size = size;
if (inode->i_size) {
AFFS_I(inode)->i_blkcnt = (size - 1) /
sbi->s_data_blksize + 1;
AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
sbi->s_hashsize + 1;
}
if (tail->link_chain)
inode->i_nlink = 2;
inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops;
inode->i_op = &affs_file_inode_operations;
inode->i_fop = &affs_file_operations;
break;
case ST_SOFTLINK:
inode->i_mode |= S_IFLNK;
inode->i_op = &affs_symlink_inode_operations;
inode->i_data.a_ops = &affs_symlink_aops;
break;
}
inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
= (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
be32_to_cpu(tail->change.mins) * 60 +
be32_to_cpu(tail->change.ticks) / 50 +
((8 * 365 + 2) * 24 * 60 * 60)) +
sys_tz.tz_minuteswest * 60;
inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
affs_brelse(bh);
unlock_new_inode(inode);
return inode;
bad_inode:
affs_brelse(bh);
iget_failed(inode);
return ERR_PTR(-EIO);
}
