#include <linux/sched.h>
#include <linux/cred.h>
#include <linux/gfp.h>
#include "affs.h"
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_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_state_read_once(inode) & I_NEW))
return inode;
pr_debug("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;
}
tail = AFFS_TAIL(sb, bh);
prot = be32_to_cpu(tail->protect);
inode->i_size = 0;
set_nlink(inode, 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 (affs_test_opt(sbi->s_flags, SF_SETMODE))
inode->i_mode = sbi->s_mode;
else
inode->i_mode = affs_prot_to_mode(prot);
id = be16_to_cpu(tail->uid);
if (id == 0 || affs_test_opt(sbi->s_flags, SF_SETUID))
inode->i_uid = sbi->s_uid;
else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
i_uid_write(inode, 0);
else
i_uid_write(inode, id);
id = be16_to_cpu(tail->gid);
if (id == 0 || affs_test_opt(sbi->s_flags, SF_SETGID))
inode->i_gid = sbi->s_gid;
else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
i_gid_write(inode, 0);
else
i_gid_write(inode, id);
switch (be32_to_cpu(tail->stype)) {
case ST_ROOT:
inode->i_uid = sbi->s_uid;
inode->i_gid = sbi->s_gid;
fallthrough;
case ST_USERDIR:
if (be32_to_cpu(tail->stype) == ST_USERDIR ||
affs_test_opt(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;
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;
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)
set_nlink(inode, 2);
inode->i_mapping->a_ops = affs_test_opt(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_size = strlen((char *)AFFS_HEAD(bh)->table);
inode->i_mode |= S_IFLNK;
inode_nohighmem(inode);
inode->i_op = &affs_symlink_inode_operations;
inode->i_data.a_ops = &affs_symlink_aops;
break;
}
inode_set_mtime(inode,
inode_set_atime(inode, inode_set_ctime(inode, (be32_to_cpu(tail->change.days) * 86400LL + be32_to_cpu(tail->change.mins) * 60 + be32_to_cpu(tail->change.ticks) / 50 + AFFS_EPOCH_DELTA) + sys_tz.tz_minuteswest * 60, 0).tv_sec, 0).tv_sec,
0);
affs_brelse(bh);
unlock_new_inode(inode);
return inode;
bad_inode:
affs_brelse(bh);
iget_failed(inode);
return ERR_PTR(-EIO);
}
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)
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_get_mtime_sec(inode),
&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_get_mtime_sec(inode),
&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;
}
int
affs_notify_change(struct mnt_idmap *idmap, struct dentry *dentry,
struct iattr *attr)
{
struct inode *inode = d_inode(dentry);
int error;
pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid);
error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
if (error)
goto out;
if (((attr->ia_valid & ATTR_UID) &&
affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETUID)) ||
((attr->ia_valid & ATTR_GID) &&
affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETGID)) ||
((attr->ia_valid & ATTR_MODE) &&
(AFFS_SB(inode->i_sb)->s_flags &
(AFFS_MOUNT_SF_SETMODE | AFFS_MOUNT_SF_IMMUTABLE)))) {
if (!affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_QUIET))
error = -EPERM;
goto out;
}
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
error = inode_newsize_ok(inode, attr->ia_size);
if (error)
return error;
truncate_setsize(inode, attr->ia_size);
affs_truncate(inode);
}
setattr_copy(&nop_mnt_idmap, inode, attr);
mark_inode_dirty(inode);
if (attr->ia_valid & ATTR_MODE)
affs_mode_to_prot(inode);
out:
return error;
}
void
affs_evict_inode(struct inode *inode)
{
unsigned long cache_page;
pr_debug("evict_inode(ino=%lu, nlink=%u)\n",
inode->i_ino, inode->i_nlink);
truncate_inode_pages_final(&inode->i_data);
if (!inode->i_nlink) {
inode->i_size = 0;
affs_truncate(inode);
}
invalidate_inode_buffers(inode);
clear_inode(inode);
affs_free_prealloc(inode);
cache_page = (unsigned long)AFFS_I(inode)->i_lc;
if (cache_page) {
pr_debug("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);
}
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;
set_nlink(inode, 1);
simple_inode_init_ts(inode);
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;
}
int
affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type)
{
struct super_block *sb = dir->i_sb;
struct buffer_head *inode_bh = NULL;
struct buffer_head *bh;
u32 block = 0;
int retval;
pr_debug("%s(dir=%lu, inode=%lu, \"%pd\", type=%d)\n", __func__,
dir->i_ino, inode->i_ino, dentry, type);
retval = -EIO;
bh = affs_bread(sb, inode->i_ino);
if (!bh)
goto done;
affs_lock_link(inode);
switch (type) {
case ST_LINKFILE:
case ST_LINKDIR:
retval = -ENOSPC;
block = affs_alloc_block(dir, dir->i_ino);
if (!block)
goto err;
retval = -EIO;
inode_bh = bh;
bh = affs_getzeroblk(sb, block);
if (!bh)
goto err;
break;
default:
break;
}
AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
if (inode_bh) {
__be32 chain;
chain = AFFS_TAIL(sb, inode_bh)->link_chain;
AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
AFFS_TAIL(sb, bh)->link_chain = chain;
AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
mark_buffer_dirty_inode(inode_bh, inode);
set_nlink(inode, 2);
ihold(inode);
}
affs_fix_checksum(sb, bh);
mark_buffer_dirty_inode(bh, inode);
dentry->d_fsdata = (void *)(long)bh->b_blocknr;
affs_lock_dir(dir);
retval = affs_insert_hash(dir, bh);
mark_buffer_dirty_inode(bh, inode);
affs_unlock_dir(dir);
affs_unlock_link(inode);
d_instantiate(dentry, inode);
done:
affs_brelse(inode_bh);
affs_brelse(bh);
return retval;
err:
if (block)
affs_free_block(sb, block);
affs_unlock_link(inode);
goto done;
}
