static int reiserfs_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_t rdev)
{
int retval;
struct inode * inode;
struct reiserfs_transaction_handle th ;
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3;
int locked;
if (!new_valid_dev(rdev))
return -EINVAL;
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM ;
}
retval = new_inode_init(inode, dir, mode);
if (retval)
return retval;
locked = reiserfs_cache_default_acl (dir);
reiserfs_write_lock(dir->i_sb);
if (locked)
reiserfs_write_lock_xattrs (dir->i_sb);
journal_begin(&th, dir->i_sb, jbegin_count) ;
retval = reiserfs_new_inode (&th, dir, mode, 0, 0/*i_size*/, dentry, inode);
if (locked)
reiserfs_write_unlock_xattrs (dir->i_sb);
if (retval) {
goto out_failed;
}
inode->i_op = &reiserfs_special_inode_operations;
init_special_inode(inode, inode->i_mode, rdev) ;
//FIXME: needed for block and char devices only
reiserfs_update_sd (&th, inode);
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
retval = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len,
inode, 1/*visible*/);
if (retval) {
inode->i_nlink--;
reiserfs_update_sd (&th, inode);
journal_end(&th, dir->i_sb, jbegin_count) ;
iput (inode);
goto out_failed;
}
d_instantiate(dentry, inode);
journal_end(&th, dir->i_sb, jbegin_count) ;
out_failed:
reiserfs_write_unlock(dir->i_sb);
return retval;
}
static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
{
if (inode && obj) {
__u32 mode = obj->yst_mode;
switch( obj->variantType ){
case YAFFS_OBJECT_TYPE_FILE :
if( ! S_ISREG(mode) ){
obj->yst_mode &= ~S_IFMT;
obj->yst_mode |= S_IFREG;
}
break;
case YAFFS_OBJECT_TYPE_SYMLINK :
if( ! S_ISLNK(mode) ){
obj->yst_mode &= ~S_IFMT;
obj->yst_mode |= S_IFLNK;
}
break;
case YAFFS_OBJECT_TYPE_DIRECTORY :
if( ! S_ISDIR(mode) ){
obj->yst_mode &= ~S_IFMT;
obj->yst_mode |= S_IFDIR;
}
break;
case YAFFS_OBJECT_TYPE_UNKNOWN :
case YAFFS_OBJECT_TYPE_HARDLINK :
case YAFFS_OBJECT_TYPE_SPECIAL :
default:
break;
}
inode->i_ino = obj->objectId;
inode->i_mode = obj->yst_mode;
inode->i_uid = obj->yst_uid;
inode->i_gid = obj->yst_gid;
inode->i_blksize = inode->i_sb->s_blocksize;
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
inode->i_rdev = old_decode_dev(obj->yst_rdev);
inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
inode->i_atime.tv_nsec = 0;
inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
inode->i_mtime.tv_nsec = 0;
inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
inode->i_ctime.tv_nsec = 0;
#else
inode->i_rdev = obj->yst_rdev;
inode->i_atime = obj->yst_atime;
inode->i_mtime = obj->yst_mtime;
inode->i_ctime = obj->yst_ctime;
#endif
inode->i_size = yaffs_GetObjectFileLength(obj);
inode->i_blocks = (inode->i_size + 511) >> 9;
inode->i_nlink = yaffs_GetObjectLinkCount(obj);
T(YAFFS_TRACE_OS,
(KERN_DEBUG
"yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
inode->i_mode, inode->i_uid, inode->i_gid,
(int)inode->i_size, atomic_read(&inode->i_count)));
switch (obj->yst_mode & S_IFMT) {
default:
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
init_special_inode(inode, obj->yst_mode,
old_decode_dev(obj->yst_rdev));
#else
init_special_inode(inode, obj->yst_mode,
(dev_t) (obj->yst_rdev));
#endif
break;
case S_IFREG:
inode->i_op = &yaffs_file_inode_operations;
inode->i_fop = &yaffs_file_operations;
inode->i_mapping->a_ops =
&yaffs_file_address_operations;
break;
case S_IFDIR:
inode->i_op = &yaffs_dir_inode_operations;
inode->i_fop = &yaffs_dir_operations;
break;
case S_IFLNK:
inode->i_op = &yaffs_symlink_inode_operations;
break;
}
inode->u.generic_ip = obj;
obj->myInode = inode;
} else {
struct inode *efs_iget(struct super_block *super, unsigned long ino)
{
int i, inode_index;
dev_t device;
u32 rdev;
struct buffer_head *bh;
struct efs_sb_info *sb = SUPER_INFO(super);
struct efs_inode_info *in;
efs_block_t block, offset;
struct efs_dinode *efs_inode;
struct inode *inode;
inode = iget_locked(super, ino);
if (IS_ERR(inode))
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
return inode;
in = INODE_INFO(inode);
/*
** EFS layout:
**
** | cylinder group | cylinder group | cylinder group ..etc
** |inodes|data |inodes|data |inodes|data ..etc
**
** work out the inode block index, (considering initially that the
** inodes are stored as consecutive blocks). then work out the block
** number of that inode given the above layout, and finally the
** offset of the inode within that block.
*/
inode_index = inode->i_ino /
(EFS_BLOCKSIZE / sizeof(struct efs_dinode));
block = sb->fs_start + sb->first_block +
(sb->group_size * (inode_index / sb->inode_blocks)) +
(inode_index % sb->inode_blocks);
offset = (inode->i_ino %
(EFS_BLOCKSIZE / sizeof(struct efs_dinode))) *
sizeof(struct efs_dinode);
bh = sb_bread(inode->i_sb, block);
if (!bh) {
printk(KERN_WARNING "EFS: bread() failed at block %d\n", block);
goto read_inode_error;
}
efs_inode = (struct efs_dinode *) (bh->b_data + offset);
inode->i_mode = be16_to_cpu(efs_inode->di_mode);
inode->i_nlink = be16_to_cpu(efs_inode->di_nlink);
inode->i_uid = (uid_t)be16_to_cpu(efs_inode->di_uid);
inode->i_gid = (gid_t)be16_to_cpu(efs_inode->di_gid);
inode->i_size = be32_to_cpu(efs_inode->di_size);
inode->i_atime.tv_sec = be32_to_cpu(efs_inode->di_atime);
inode->i_mtime.tv_sec = be32_to_cpu(efs_inode->di_mtime);
inode->i_ctime.tv_sec = be32_to_cpu(efs_inode->di_ctime);
inode->i_atime.tv_nsec = inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = 0;
/* this is the number of blocks in the file */
if (inode->i_size == 0) {
inode->i_blocks = 0;
} else {
inode->i_blocks = ((inode->i_size - 1) >> EFS_BLOCKSIZE_BITS) + 1;
}
rdev = be16_to_cpu(efs_inode->di_u.di_dev.odev);
if (rdev == 0xffff) {
rdev = be32_to_cpu(efs_inode->di_u.di_dev.ndev);
if (sysv_major(rdev) > 0xfff)
device = 0;
else
device = MKDEV(sysv_major(rdev), sysv_minor(rdev));
} else
device = old_decode_dev(rdev);
/* get the number of extents for this object */
in->numextents = be16_to_cpu(efs_inode->di_numextents);
in->lastextent = 0;
/* copy the extents contained within the inode to memory */
for(i = 0; i < EFS_DIRECTEXTENTS; i++) {
extent_copy(&(efs_inode->di_u.di_extents[i]), &(in->extents[i]));
if (i < in->numextents && in->extents[i].cooked.ex_magic != 0) {
printk(KERN_WARNING "EFS: extent %d has bad magic number in inode %lu\n", i, inode->i_ino);
brelse(bh);
goto read_inode_error;
}
}
brelse(bh);
#ifdef DEBUG
printk(KERN_DEBUG "EFS: efs_iget(): inode %lu, extents %d, mode %o\n",
inode->i_ino, in->numextents, inode->i_mode);
#endif
switch (inode->i_mode & S_IFMT) {
case S_IFDIR:
inode->i_op = &efs_dir_inode_operations;
inode->i_fop = &efs_dir_operations;
break;
case S_IFREG:
inode->i_fop = &generic_ro_fops;
inode->i_data.a_ops = &efs_aops;
break;
case S_IFLNK:
inode->i_op = &page_symlink_inode_operations;
inode->i_data.a_ops = &efs_symlink_aops;
break;
case S_IFCHR:
case S_IFBLK:
case S_IFIFO:
init_special_inode(inode, inode->i_mode, device);
break;
default:
printk(KERN_WARNING "EFS: unsupported inode mode %o\n", inode->i_mode);
goto read_inode_error;
break;
}
unlock_new_inode(inode);
return inode;
read_inode_error:
printk(KERN_WARNING "EFS: failed to read inode %lu\n", inode->i_ino);
iget_failed(inode);
return ERR_PTR(-EIO);
}
void jffs2_read_inode (struct inode *inode)
{
struct jffs2_inode_info *f;
struct jffs2_sb_info *c;
struct jffs2_raw_inode latest_node;
int ret;
D1(printk(KERN_DEBUG "jffs2_read_inode(): inode->i_ino == %lu\n", inode->i_ino));
f = JFFS2_INODE_INFO(inode);
c = JFFS2_SB_INFO(inode->i_sb);
jffs2_init_inode_info(f);
down(&f->sem);
ret = jffs2_do_read_inode(c, f, inode->i_ino, &latest_node);
if (ret) {
make_bad_inode(inode);
up(&f->sem);
return;
}
inode->i_mode = jemode_to_cpu(latest_node.mode);
inode->i_uid = je16_to_cpu(latest_node.uid);
inode->i_gid = je16_to_cpu(latest_node.gid);
inode->i_size = je32_to_cpu(latest_node.isize);
inode->i_atime = ITIME(je32_to_cpu(latest_node.atime));
inode->i_mtime = ITIME(je32_to_cpu(latest_node.mtime));
inode->i_ctime = ITIME(je32_to_cpu(latest_node.ctime));
inode->i_nlink = f->inocache->nlink;
inode->i_blksize = PAGE_SIZE;
inode->i_blocks = (inode->i_size + 511) >> 9;
switch (inode->i_mode & S_IFMT) {
jint16_t rdev;
case S_IFLNK:
inode->i_op = &jffs2_symlink_inode_operations;
break;
case S_IFDIR:
{
struct jffs2_full_dirent *fd;
for (fd=f->dents; fd; fd = fd->next) {
if (fd->type == DT_DIR && fd->ino)
inode->i_nlink++;
}
/* and '..' */
inode->i_nlink++;
/* Root dir gets i_nlink 3 for some reason */
if (inode->i_ino == 1)
inode->i_nlink++;
inode->i_op = &jffs2_dir_inode_operations;
inode->i_fop = &jffs2_dir_operations;
break;
}
case S_IFREG:
inode->i_op = &jffs2_file_inode_operations;
inode->i_fop = &jffs2_file_operations;
inode->i_mapping->a_ops = &jffs2_file_address_operations;
inode->i_mapping->nrpages = 0;
break;
case S_IFBLK:
case S_IFCHR:
/* Read the device numbers from the media */
D1(printk(KERN_DEBUG "Reading device numbers from flash\n"));
if (jffs2_read_dnode(c, f, f->metadata, (char *)&rdev, 0, sizeof(rdev)) < 0) {
/* Eep */
printk(KERN_NOTICE "Read device numbers for inode %lu failed\n", (unsigned long)inode->i_ino);
up(&f->sem);
jffs2_do_clear_inode(c, f);
make_bad_inode(inode);
return;
}
case S_IFSOCK:
case S_IFIFO:
inode->i_op = &jffs2_file_inode_operations;
init_special_inode(inode, inode->i_mode,
old_decode_dev((je16_to_cpu(rdev))));
break;
default:
printk(KERN_WARNING "jffs2_read_inode(): Bogus imode %o for ino %lu\n", inode->i_mode, (unsigned long)inode->i_ino);
}
up(&f->sem);
D1(printk(KERN_DEBUG "jffs2_read_inode() returning\n"));
}
/*
* Initialize the Linux inode, set up the operation vectors and
* unlock the inode.
*
* When reading existing inodes from disk this is called directly
* from xfs_iget, when creating a new inode it is called from
* xfs_ialloc after setting up the inode.
*
* We are always called with an uninitialised linux inode here.
* We need to initialise the necessary fields and take a reference
* on it.
*/
void
xfs_setup_inode(
struct xfs_inode *ip)
{
struct inode *inode = &ip->i_vnode;
inode->i_ino = ip->i_ino;
inode->i_state = I_NEW;
inode_sb_list_add(inode);
/* make the inode look hashed for the writeback code */
hlist_add_fake(&inode->i_hash);
inode->i_mode = ip->i_d.di_mode;
inode->i_nlink = ip->i_d.di_nlink;
inode->i_uid = ip->i_d.di_uid;
inode->i_gid = ip->i_d.di_gid;
switch (inode->i_mode & S_IFMT) {
case S_IFBLK:
case S_IFCHR:
inode->i_rdev =
MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
sysv_minor(ip->i_df.if_u2.if_rdev));
break;
default:
inode->i_rdev = 0;
break;
}
inode->i_generation = ip->i_d.di_gen;
i_size_write(inode, ip->i_d.di_size);
inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
xfs_diflags_to_iflags(inode, ip);
switch (inode->i_mode & S_IFMT) {
case S_IFREG:
inode->i_op = &xfs_inode_operations;
inode->i_fop = &xfs_file_operations;
inode->i_mapping->a_ops = &xfs_address_space_operations;
break;
case S_IFDIR:
if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
inode->i_op = &xfs_dir_ci_inode_operations;
else
inode->i_op = &xfs_dir_inode_operations;
inode->i_fop = &xfs_dir_file_operations;
break;
case S_IFLNK:
inode->i_op = &xfs_symlink_inode_operations;
if (!(ip->i_df.if_flags & XFS_IFINLINE))
inode->i_mapping->a_ops = &xfs_address_space_operations;
break;
default:
inode->i_op = &xfs_inode_operations;
init_special_inode(inode, inode->i_mode, inode->i_rdev);
break;
}
xfs_iflags_clear(ip, XFS_INEW);
barrier();
unlock_new_inode(inode);
}
static int reiserfs_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_t rdev)
{
int retval;
struct inode * inode;
struct reiserfs_transaction_handle th ;
/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
int jbegin_count = JOURNAL_PER_BALANCE_CNT * 3 + 2 * (REISERFS_QUOTA_INIT_BLOCKS+REISERFS_QUOTA_TRANS_BLOCKS);
int locked;
if (!new_valid_dev(rdev))
return -EINVAL;
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM ;
}
new_inode_init(inode, dir, mode);
locked = reiserfs_cache_default_acl (dir);
reiserfs_write_lock(dir->i_sb);
if (locked)
reiserfs_write_lock_xattrs (dir->i_sb);
retval = journal_begin(&th, dir->i_sb, jbegin_count) ;
if (retval) {
drop_new_inode (inode);
goto out_failed;
}
retval = reiserfs_new_inode (&th, dir, mode, NULL, 0/*i_size*/, dentry, inode);
if (retval) {
goto out_failed;
}
if (locked) {
reiserfs_write_unlock_xattrs (dir->i_sb);
locked = 0;
}
inode->i_op = &reiserfs_special_inode_operations;
init_special_inode(inode, inode->i_mode, rdev) ;
//FIXME: needed for block and char devices only
reiserfs_update_sd (&th, inode);
reiserfs_update_inode_transaction(inode) ;
reiserfs_update_inode_transaction(dir) ;
retval = reiserfs_add_entry (&th, dir, dentry->d_name.name, dentry->d_name.len,
inode, 1/*visible*/);
if (retval) {
int err;
inode->i_nlink--;
reiserfs_update_sd (&th, inode);
err = journal_end(&th, dir->i_sb, jbegin_count) ;
if (err)
retval = err;
iput (inode);
goto out_failed;
}
d_instantiate(dentry, inode);
retval = journal_end(&th, dir->i_sb, jbegin_count) ;
out_failed:
if (locked)
reiserfs_write_unlock_xattrs (dir->i_sb);
reiserfs_write_unlock(dir->i_sb);
return retval;
}
struct dentry *f2fs_get_parent(struct dentry *child)
{
struct qstr dotdot = {.len = 2, .name = ".."};
unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
if (!ino)
return ERR_PTR(-ENOENT);
return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
}
static int __recover_dot_dentries(struct inode *dir, nid_t pino)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct qstr dot = {.len = 1, .name = "."};
struct qstr dotdot = {.len = 2, .name = ".."};
struct f2fs_dir_entry *de;
struct page *page;
int err = 0;
f2fs_lock_op(sbi);
de = f2fs_find_entry(dir, &dot, &page, 0);
if (de) {
f2fs_dentry_kunmap(dir, page);
f2fs_put_page(page, 0);
} else {
err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
if (err)
goto out;
}
de = f2fs_find_entry(dir, &dotdot, &page, 0);
if (de) {
f2fs_dentry_kunmap(dir, page);
f2fs_put_page(page, 0);
} else {
err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
}
out:
if (!err) {
clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS);
mark_inode_dirty(dir);
}
f2fs_unlock_op(sbi);
return err;
}
static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
struct inode *inode = NULL;
struct f2fs_dir_entry *de;
struct page *page;
nid_t ino;
int err = 0;
if (dentry->d_name.len > F2FS_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
de = f2fs_find_entry(dir, &dentry->d_name, &page, nd ? nd->flags : 0);
if (!de)
return d_splice_alias(inode, dentry);
ino = le32_to_cpu(de->ino);
f2fs_dentry_kunmap(dir, page);
f2fs_put_page(page, 0);
inode = f2fs_iget(dir->i_sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
if (f2fs_has_inline_dots(inode)) {
err = __recover_dot_dentries(inode, dir->i_ino);
if (err)
goto err_out;
}
return d_splice_alias(inode, dentry);
err_out:
iget_failed(inode);
return ERR_PTR(err);
}
static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct inode *inode = dentry->d_inode;
struct f2fs_dir_entry *de;
struct page *page;
int err = -ENOENT;
trace_f2fs_unlink_enter(dir, dentry);
f2fs_balance_fs(sbi);
de = f2fs_find_entry(dir, &dentry->d_name, &page, 0);
if (!de)
goto fail;
f2fs_lock_op(sbi);
err = acquire_orphan_inode(sbi);
if (err) {
f2fs_unlock_op(sbi);
f2fs_dentry_kunmap(dir, page);
f2fs_put_page(page, 0);
goto fail;
}
f2fs_delete_entry(de, page, dir, inode);
f2fs_unlock_op(sbi);
/* In order to evict this inode, we set it dirty */
mark_inode_dirty(inode);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
fail:
trace_f2fs_unlink_exit(inode, err);
return err;
}
static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct page *page;
page = page_follow_link_light(dentry, nd);
if (IS_ERR(page))
return page;
/* this is broken symlink case */
if (*nd_get_link(nd) == 0) {
kunmap(page);
page_cache_release(page);
return ERR_PTR(-ENOENT);
}
return page;
}
static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
const char *symname)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct inode *inode;
size_t len = strlen(symname);
size_t p_len;
char *p_str;
struct f2fs_str disk_link = FSTR_INIT(NULL, 0);
struct f2fs_encrypted_symlink_data *sd = NULL;
int err;
if (len > dir->i_sb->s_blocksize)
return -ENAMETOOLONG;
f2fs_balance_fs(sbi);
inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
if (IS_ERR(inode))
return PTR_ERR(inode);
if (f2fs_encrypted_inode(inode))
inode->i_op = &f2fs_encrypted_symlink_inode_operations;
else
inode->i_op = &f2fs_symlink_inode_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
goto out;
f2fs_unlock_op(sbi);
alloc_nid_done(sbi, inode->i_ino);
if (f2fs_encrypted_inode(dir)) {
struct qstr istr = QSTR_INIT(symname, len);
err = f2fs_get_encryption_info(inode);
if (err)
goto err_out;
err = f2fs_fname_crypto_alloc_buffer(inode, len, &disk_link);
if (err)
goto err_out;
err = f2fs_fname_usr_to_disk(inode, &istr, &disk_link);
if (err < 0)
goto err_out;
p_len = encrypted_symlink_data_len(disk_link.len) + 1;
if (p_len > dir->i_sb->s_blocksize) {
err = -ENAMETOOLONG;
goto err_out;
}
sd = kzalloc(p_len, GFP_NOFS);
if (!sd) {
err = -ENOMEM;
goto err_out;
}
memcpy(sd->encrypted_path, disk_link.name, disk_link.len);
sd->len = cpu_to_le16(disk_link.len);
p_str = (char *)sd;
} else {
p_len = len + 1;
p_str = (char *)symname;
}
err = page_symlink(inode, p_str, p_len);
err_out:
d_instantiate(dentry, inode);
unlock_new_inode(inode);
/*
* Let's flush symlink data in order to avoid broken symlink as much as
* possible. Nevertheless, fsyncing is the best way, but there is no
* way to get a file descriptor in order to flush that.
*
* Note that, it needs to do dir->fsync to make this recoverable.
* If the symlink path is stored into inline_data, there is no
* performance regression.
*/
if (!err)
filemap_write_and_wait_range(inode->i_mapping, 0, p_len - 1);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
kfree(sd);
f2fs_fname_crypto_free_buffer(&disk_link);
return err;
out:
handle_failed_inode(inode);
return err;
}
static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct inode *inode;
int err;
f2fs_balance_fs(sbi);
inode = f2fs_new_inode(dir, S_IFDIR | mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
inode->i_op = &f2fs_dir_inode_operations;
inode->i_fop = &f2fs_dir_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;
mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
set_inode_flag(F2FS_I(inode), FI_INC_LINK);
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
goto out_fail;
f2fs_unlock_op(sbi);
alloc_nid_done(sbi, inode->i_ino);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
return 0;
out_fail:
clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
handle_failed_inode(inode);
return err;
}
static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
if (f2fs_empty_dir(inode))
return f2fs_unlink(dir, dentry);
return -ENOTEMPTY;
}
static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
int mode, dev_t rdev)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct inode *inode;
int err = 0;
if (!new_valid_dev(rdev))
return -EINVAL;
f2fs_balance_fs(sbi);
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
init_special_inode(inode, inode->i_mode, rdev);
inode->i_op = &f2fs_special_inode_operations;
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
goto out;
f2fs_unlock_op(sbi);
alloc_nid_done(sbi, inode->i_ino);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
return 0;
out:
handle_failed_inode(inode);
return err;
}
static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
struct inode *old_inode = old_dentry->d_inode;
struct inode *new_inode = new_dentry->d_inode;
struct page *old_dir_page;
struct page *old_page, *new_page;
struct f2fs_dir_entry *old_dir_entry = NULL;
struct f2fs_dir_entry *old_entry;
struct f2fs_dir_entry *new_entry;
int err = -ENOENT;
if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) &&
!f2fs_is_child_context_consistent_with_parent(new_dir,
old_inode)) {
err = -EPERM;
goto out;
}
f2fs_balance_fs(sbi);
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page, 0);
if (!old_entry)
goto out;
if (S_ISDIR(old_inode->i_mode)) {
err = -EIO;
old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
if (!old_dir_entry)
goto out_old;
}
if (new_inode) {
err = -ENOTEMPTY;
if (old_dir_entry && !f2fs_empty_dir(new_inode))
goto out_dir;
err = -ENOENT;
new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
&new_page, 0);
if (!new_entry)
goto out_dir;
f2fs_lock_op(sbi);
err = acquire_orphan_inode(sbi);
if (err)
goto put_out_dir;
if (update_dent_inode(old_inode, new_inode,
&new_dentry->d_name)) {
release_orphan_inode(sbi);
goto put_out_dir;
}
f2fs_set_link(new_dir, new_entry, new_page, old_inode);
new_inode->i_ctime = CURRENT_TIME;
down_write(&F2FS_I(new_inode)->i_sem);
if (old_dir_entry)
drop_nlink(new_inode);
drop_nlink(new_inode);
up_write(&F2FS_I(new_inode)->i_sem);
mark_inode_dirty(new_inode);
if (!new_inode->i_nlink)
add_orphan_inode(sbi, new_inode->i_ino);
else
release_orphan_inode(sbi);
update_inode_page(old_inode);
update_inode_page(new_inode);
} else {
f2fs_lock_op(sbi);
err = f2fs_add_link(new_dentry, old_inode);
if (err) {
f2fs_unlock_op(sbi);
goto out_dir;
}
if (old_dir_entry) {
inc_nlink(new_dir);
update_inode_page(new_dir);
}
}
down_write(&F2FS_I(old_inode)->i_sem);
file_lost_pino(old_inode);
if (new_inode && file_enc_name(new_inode))
file_set_enc_name(old_inode);
up_write(&F2FS_I(old_inode)->i_sem);
old_inode->i_ctime = CURRENT_TIME;
mark_inode_dirty(old_inode);
f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
if (old_dir_entry) {
if (old_dir != new_dir) {
f2fs_set_link(old_inode, old_dir_entry,
old_dir_page, new_dir);
update_inode_page(old_inode);
} else {
f2fs_dentry_kunmap(old_inode, old_dir_page);
f2fs_put_page(old_dir_page, 0);
}
drop_nlink(old_dir);
mark_inode_dirty(old_dir);
update_inode_page(old_dir);
}
f2fs_unlock_op(sbi);
if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
f2fs_sync_fs(sbi->sb, 1);
return 0;
put_out_dir:
f2fs_unlock_op(sbi);
f2fs_dentry_kunmap(new_dir, new_page);
f2fs_put_page(new_page, 0);
out_dir:
if (old_dir_entry) {
f2fs_dentry_kunmap(old_inode, old_dir_page);
f2fs_put_page(old_dir_page, 0);
}
out_old:
f2fs_dentry_kunmap(old_dir, old_page);
f2fs_put_page(old_page, 0);
out:
return err;
}
#ifdef CONFIG_F2FS_FS_ENCRYPTION
static void *f2fs_encrypted_follow_link(struct dentry *dentry,
struct nameidata *nd)
{
struct page *cpage = NULL;
char *caddr, *paddr = NULL;
struct f2fs_str cstr;
struct f2fs_str pstr = FSTR_INIT(NULL, 0);
struct inode *inode = dentry->d_inode;
struct f2fs_encrypted_symlink_data *sd;
loff_t size = min_t(loff_t, i_size_read(inode), PAGE_SIZE - 1);
u32 max_size = inode->i_sb->s_blocksize;
int res;
res = f2fs_get_encryption_info(inode);
if (res)
return ERR_PTR(res);
cpage = read_mapping_page(inode->i_mapping, 0, NULL);
if (IS_ERR(cpage))
return cpage;
caddr = kmap(cpage);
caddr[size] = 0;
/* Symlink is encrypted */
sd = (struct f2fs_encrypted_symlink_data *)caddr;
cstr.name = sd->encrypted_path;
cstr.len = le16_to_cpu(sd->len);
/* this is broken symlink case */
if (cstr.name[0] == 0 && cstr.len == 0) {
res = -ENOENT;
goto errout;
}
if ((cstr.len + sizeof(struct f2fs_encrypted_symlink_data) - 1) >
max_size) {
/* Symlink data on the disk is corrupted */
res = -EIO;
goto errout;
}
res = f2fs_fname_crypto_alloc_buffer(inode, cstr.len, &pstr);
if (res)
goto errout;
res = f2fs_fname_disk_to_usr(inode, NULL, &cstr, &pstr);
if (res < 0)
goto errout;
paddr = pstr.name;
/* Null-terminate the name */
paddr[res] = '\0';
nd_set_link(nd, paddr);
kunmap(cpage);
page_cache_release(cpage);
return NULL;
errout:
f2fs_fname_crypto_free_buffer(&pstr);
kunmap(cpage);
page_cache_release(cpage);
return ERR_PTR(res);
}
void kfree_put_link(struct dentry *dentry, struct nameidata *nd,
void *cookie)
{
char *s = nd_get_link(nd);
if (!IS_ERR(s))
kfree(s);
}
const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = f2fs_encrypted_follow_link,
.put_link = kfree_put_link,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = f2fs_listxattr,
.removexattr = generic_removexattr,
};
#endif
const struct inode_operations f2fs_dir_inode_operations = {
.create = f2fs_create,
.lookup = f2fs_lookup,
.link = f2fs_link,
.unlink = f2fs_unlink,
.symlink = f2fs_symlink,
.mkdir = f2fs_mkdir,
.rmdir = f2fs_rmdir,
.mknod = f2fs_mknod,
.rename = f2fs_rename,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
.check_acl = f2fs_check_acl,
#ifdef CONFIG_F2FS_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = f2fs_listxattr,
.removexattr = generic_removexattr,
#endif
};
const struct inode_operations f2fs_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = f2fs_follow_link,
.put_link = page_put_link,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
#ifdef CONFIG_F2FS_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = f2fs_listxattr,
.removexattr = generic_removexattr,
#endif
};
const struct inode_operations f2fs_special_inode_operations = {
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
.check_acl = f2fs_check_acl,
#ifdef CONFIG_F2FS_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = f2fs_listxattr,
.removexattr = generic_removexattr,
#endif
};
static int set_inode(struct inode *inode, struct dentry *dentry)
{
int err;
unsigned int flags;
umode_t mode;
aufs_bindex_t bindex, bstart, btail;
unsigned char isdir;
struct dentry *h_dentry;
struct inode *h_inode;
struct au_iinfo *iinfo;
IiMustWriteLock(inode);
err = 0;
isdir = 0;
bstart = au_dbstart(dentry);
h_inode = au_h_dptr(dentry, bstart)->d_inode;
mode = h_inode->i_mode;
switch (mode & S_IFMT) {
case S_IFREG:
btail = au_dbtail(dentry);
inode->i_op = &aufs_iop;
inode->i_fop = &aufs_file_fop;
inode->i_mapping->a_ops = &aufs_aop;
break;
case S_IFDIR:
isdir = 1;
btail = au_dbtaildir(dentry);
inode->i_op = &aufs_dir_iop;
inode->i_fop = &aufs_dir_fop;
break;
case S_IFLNK:
btail = au_dbtail(dentry);
inode->i_op = &aufs_symlink_iop;
break;
case S_IFBLK:
case S_IFCHR:
case S_IFIFO:
case S_IFSOCK:
btail = au_dbtail(dentry);
inode->i_op = &aufs_iop;
init_special_inode(inode, mode, h_inode->i_rdev);
break;
default:
AuIOErr("Unknown file type 0%o\n", mode);
err = -EIO;
goto out;
}
/* do not set inotify for whiteouted dirs (SHWH mode) */
flags = au_hi_flags(inode, isdir);
if (au_opt_test(au_mntflags(dentry->d_sb), SHWH)
&& au_ftest_hi(flags, HINOTIFY)
&& dentry->d_name.len > AUFS_WH_PFX_LEN
&& !memcmp(dentry->d_name.name, AUFS_WH_PFX, AUFS_WH_PFX_LEN))
au_fclr_hi(flags, HINOTIFY);
iinfo = au_ii(inode);
iinfo->ii_bstart = bstart;
iinfo->ii_bend = btail;
for (bindex = bstart; bindex <= btail; bindex++) {
h_dentry = au_h_dptr(dentry, bindex);
if (h_dentry)
au_set_h_iptr(inode, bindex,
au_igrab(h_dentry->d_inode), flags);
}
au_cpup_attr_all(inode, /*force*/1);
out:
return err;
}
static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
dev_t rdev)
{
int retval;
struct inode *inode;
struct reiserfs_transaction_handle th;
struct reiserfs_security_handle security;
/*
* We need blocks for transaction + (user+group)*(quotas
* for new inode + update of quota for directory owner)
*/
int jbegin_count =
JOURNAL_PER_BALANCE_CNT * 3 +
2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) +
REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
retval = dquot_initialize(dir);
if (retval)
return retval;
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM;
}
retval = new_inode_init(inode, dir, mode);
if (retval) {
drop_new_inode(inode);
return retval;
}
jbegin_count += reiserfs_cache_default_acl(dir);
retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security);
if (retval < 0) {
drop_new_inode(inode);
return retval;
}
jbegin_count += retval;
reiserfs_write_lock(dir->i_sb);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval) {
drop_new_inode(inode);
goto out_failed;
}
retval =
reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry,
inode, &security);
if (retval) {
goto out_failed;
}
inode->i_op = &reiserfs_special_inode_operations;
init_special_inode(inode, inode->i_mode, rdev);
/* FIXME: needed for block and char devices only */
reiserfs_update_sd(&th, inode);
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
retval =
reiserfs_add_entry(&th, dir, dentry->d_name.name,
dentry->d_name.len, inode, 1 /*visible */ );
if (retval) {
int err;
drop_nlink(inode);
reiserfs_update_sd(&th, inode);
err = journal_end(&th);
if (err)
retval = err;
unlock_new_inode(inode);
iput(inode);
goto out_failed;
}
d_instantiate_new(dentry, inode);
retval = journal_end(&th);
out_failed:
reiserfs_write_unlock(dir->i_sb);
return retval;
}
struct dentry *f2fs_get_parent(struct dentry *child)
{
struct qstr dotdot = {.len = 2, .name = ".."};
unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
if (!ino)
return ERR_PTR(-ENOENT);
return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
}
static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
struct inode *inode = NULL;
struct f2fs_dir_entry *de;
struct page *page;
if (dentry->d_name.len > F2FS_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
de = f2fs_find_entry(dir, &dentry->d_name, &page);
if (de) {
nid_t ino = le32_to_cpu(de->ino);
kunmap(page);
f2fs_put_page(page, 0);
inode = f2fs_iget(dir->i_sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
}
return d_splice_alias(inode, dentry);
}
static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
{
struct super_block *sb = dir->i_sb;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct inode *inode = dentry->d_inode;
struct f2fs_dir_entry *de;
struct page *page;
int err = -ENOENT;
trace_f2fs_unlink_enter(dir, dentry);
f2fs_balance_fs(sbi);
de = f2fs_find_entry(dir, &dentry->d_name, &page);
if (!de)
goto fail;
f2fs_lock_op(sbi);
err = acquire_orphan_inode(sbi);
if (err) {
f2fs_unlock_op(sbi);
kunmap(page);
f2fs_put_page(page, 0);
goto fail;
}
f2fs_delete_entry(de, page, inode);
f2fs_unlock_op(sbi);
/* In order to evict this inode, we set it dirty */
mark_inode_dirty(inode);
fail:
trace_f2fs_unlink_exit(inode, err);
return err;
}
static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
const char *symname)
{
struct super_block *sb = dir->i_sb;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct inode *inode;
size_t symlen = strlen(symname) + 1;
int err;
f2fs_balance_fs(sbi);
inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
if (IS_ERR(inode))
return PTR_ERR(inode);
inode->i_op = &f2fs_symlink_inode_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
f2fs_unlock_op(sbi);
if (err)
goto out;
err = page_symlink(inode, symname, symlen);
alloc_nid_done(sbi, inode->i_ino);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
return err;
out:
clear_nlink(inode);
unlock_new_inode(inode);
make_bad_inode(inode);
iput(inode);
alloc_nid_failed(sbi, inode->i_ino);
return err;
}
static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
struct f2fs_sb_info *sbi;
struct inode *inode;
int err;
if (dir->i_nlink >= F2FS_LINK_MAX)
return -EMLINK;
sbi = F2FS_SB(dir->i_sb);
f2fs_balance_fs(sbi);
inode = f2fs_new_inode(dir, S_IFDIR | mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
inode->i_op = &f2fs_dir_inode_operations;
inode->i_fop = &f2fs_dir_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;
mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
set_inode_flag(F2FS_I(inode), FI_INC_LINK);
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
f2fs_unlock_op(sbi);
if (err)
goto out_fail;
alloc_nid_done(sbi, inode->i_ino);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
return 0;
out_fail:
clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
clear_nlink(inode);
unlock_new_inode(inode);
make_bad_inode(inode);
iput(inode);
alloc_nid_failed(sbi, inode->i_ino);
return err;
}
static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
if (f2fs_empty_dir(inode))
return f2fs_unlink(dir, dentry);
return -ENOTEMPTY;
}
static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
int mode, dev_t rdev)
{
struct super_block *sb = dir->i_sb;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct inode *inode;
int err = 0;
if (!new_valid_dev(rdev))
return -EINVAL;
f2fs_balance_fs(sbi);
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
init_special_inode(inode, inode->i_mode, rdev);
inode->i_op = &f2fs_special_inode_operations;
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
f2fs_unlock_op(sbi);
if (err)
goto out;
alloc_nid_done(sbi, inode->i_ino);
d_instantiate(dentry, inode);
unlock_new_inode(inode);
return 0;
out:
clear_nlink(inode);
unlock_new_inode(inode);
make_bad_inode(inode);
iput(inode);
alloc_nid_failed(sbi, inode->i_ino);
return err;
}
static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct super_block *sb = old_dir->i_sb;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct inode *old_inode = old_dentry->d_inode;
struct inode *new_inode = new_dentry->d_inode;
struct page *old_dir_page;
struct page *old_page, *new_page;
struct f2fs_dir_entry *old_dir_entry = NULL;
struct f2fs_dir_entry *old_entry;
struct f2fs_dir_entry *new_entry;
int err = -ENOENT;
f2fs_balance_fs(sbi);
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
if (!old_entry)
goto out;
if (S_ISDIR(old_inode->i_mode)) {
err = -EIO;
old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
if (!old_dir_entry)
goto out_old;
}
f2fs_lock_op(sbi);
if (new_inode) {
err = -ENOTEMPTY;
if (old_dir_entry && !f2fs_empty_dir(new_inode))
goto out_dir;
err = -ENOENT;
new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
&new_page);
if (!new_entry)
goto out_dir;
err = acquire_orphan_inode(sbi);
if (err)
goto put_out_dir;
if (update_dent_inode(old_inode, &new_dentry->d_name)) {
release_orphan_inode(sbi);
goto put_out_dir;
}
f2fs_set_link(new_dir, new_entry, new_page, old_inode);
F2FS_I(old_inode)->i_pino = new_dir->i_ino;
new_inode->i_ctime = CURRENT_TIME;
if (old_dir_entry)
drop_nlink(new_inode);
drop_nlink(new_inode);
mark_inode_dirty(new_inode);
if (!new_inode->i_nlink)
add_orphan_inode(sbi, new_inode->i_ino);
else
release_orphan_inode(sbi);
update_inode_page(old_inode);
update_inode_page(new_inode);
} else {
if (old_dir_entry) {
err = -EMLINK;
if (new_dir->i_nlink >= F2FS_LINK_MAX)
goto out_dir;
}
err = f2fs_add_link(new_dentry, old_inode);
if (err)
goto out_dir;
if (old_dir_entry) {
inc_nlink(new_dir);
update_inode_page(new_dir);
}
}
old_inode->i_ctime = CURRENT_TIME;
mark_inode_dirty(old_inode);
f2fs_delete_entry(old_entry, old_page, NULL);
if (old_dir_entry) {
if (old_dir != new_dir) {
f2fs_set_link(old_inode, old_dir_entry,
old_dir_page, new_dir);
F2FS_I(old_inode)->i_pino = new_dir->i_ino;
update_inode_page(old_inode);
} else {
kunmap(old_dir_page);
f2fs_put_page(old_dir_page, 0);
}
drop_nlink(old_dir);
mark_inode_dirty(old_dir);
update_inode_page(old_dir);
}
f2fs_unlock_op(sbi);
return 0;
put_out_dir:
f2fs_put_page(new_page, 1);
out_dir:
if (old_dir_entry) {
kunmap(old_dir_page);
f2fs_put_page(old_dir_page, 0);
}
f2fs_unlock_op(sbi);
out_old:
kunmap(old_page);
f2fs_put_page(old_page, 0);
out:
return err;
}
const struct inode_operations f2fs_dir_inode_operations = {
.create = f2fs_create,
.lookup = f2fs_lookup,
.link = f2fs_link,
.unlink = f2fs_unlink,
.symlink = f2fs_symlink,
.mkdir = f2fs_mkdir,
.rmdir = f2fs_rmdir,
.mknod = f2fs_mknod,
.rename = f2fs_rename,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
.check_acl = f2fs_check_acl,
#ifdef CONFIG_F2FS_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = f2fs_listxattr,
.removexattr = generic_removexattr,
#endif
};
const struct inode_operations f2fs_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = page_follow_link_light,
.put_link = page_put_link,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
#ifdef CONFIG_F2FS_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = f2fs_listxattr,
.removexattr = generic_removexattr,
#endif
};
const struct inode_operations f2fs_special_inode_operations = {
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
.check_acl = f2fs_check_acl,
#ifdef CONFIG_F2FS_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = f2fs_listxattr,
.removexattr = generic_removexattr,
#endif
};
static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
bool excl)
{
struct inode *inode;
struct ubifs_info *c = dir->i_sb->s_fs_info;
int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
.dirtied_ino = 1 };
struct ubifs_inode *dir_ui = ubifs_inode(dir);
/*
* Budget request settings: new inode, new direntry, changing the
* parent directory inode.
*/
dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
dentry, mode, dir->i_ino);
err = ubifs_budget_space(c, &req);
if (err)
return err;
inode = ubifs_new_inode(c, dir, mode);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out_budg;
}
err = ubifs_init_security(dir, inode, &dentry->d_name);
if (err)
goto out_inode;
mutex_lock(&dir_ui->ui_mutex);
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
if (err)
goto out_cancel;
mutex_unlock(&dir_ui->ui_mutex);
ubifs_release_budget(c, &req);
insert_inode_hash(inode);
d_instantiate(dentry, inode);
return 0;
out_cancel:
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
mutex_unlock(&dir_ui->ui_mutex);
out_inode:
make_bad_inode(inode);
iput(inode);
out_budg:
ubifs_release_budget(c, &req);
ubifs_err(c, "cannot create regular file, error %d", err);
return err;
}
static int do_tmpfile(struct inode *dir, struct dentry *dentry,
umode_t mode, struct inode **whiteout)
{
struct inode *inode;
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1};
struct ubifs_budget_req ino_req = { .dirtied_ino = 1 };
struct ubifs_inode *ui, *dir_ui = ubifs_inode(dir);
int err, instantiated = 0;
/*
* Budget request settings: new dirty inode, new direntry,
* budget for dirtied inode will be released via writeback.
*/
dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
dentry, mode, dir->i_ino);
err = ubifs_budget_space(c, &req);
if (err)
return err;
err = ubifs_budget_space(c, &ino_req);
if (err) {
ubifs_release_budget(c, &req);
return err;
}
inode = ubifs_new_inode(c, dir, mode);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out_budg;
}
ui = ubifs_inode(inode);
if (whiteout) {
init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
ubifs_assert(inode->i_op == &ubifs_file_inode_operations);
}
err = ubifs_init_security(dir, inode, &dentry->d_name);
if (err)
goto out_inode;
mutex_lock(&ui->ui_mutex);
insert_inode_hash(inode);
if (whiteout) {
mark_inode_dirty(inode);
drop_nlink(inode);
*whiteout = inode;
} else {
d_tmpfile(dentry, inode);
}
ubifs_assert(ui->dirty);
instantiated = 1;
mutex_unlock(&ui->ui_mutex);
mutex_lock(&dir_ui->ui_mutex);
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0);
if (err)
goto out_cancel;
mutex_unlock(&dir_ui->ui_mutex);
ubifs_release_budget(c, &req);
return 0;
out_cancel:
mutex_unlock(&dir_ui->ui_mutex);
out_inode:
make_bad_inode(inode);
if (!instantiated)
iput(inode);
out_budg:
ubifs_release_budget(c, &req);
if (!instantiated)
ubifs_release_budget(c, &ino_req);
ubifs_err(c, "cannot create temporary file, error %d", err);
return err;
}
static int ubifs_tmpfile(struct inode *dir, struct dentry *dentry,
umode_t mode)
{
return do_tmpfile(dir, dentry, mode, NULL);
}
/**
* vfs_dent_type - get VFS directory entry type.
* @type: UBIFS directory entry type
*
* This function converts UBIFS directory entry type into VFS directory entry
* type.
*/
static unsigned int vfs_dent_type(uint8_t type)
{
switch (type) {
case UBIFS_ITYPE_REG:
return DT_REG;
case UBIFS_ITYPE_DIR:
return DT_DIR;
case UBIFS_ITYPE_LNK:
return DT_LNK;
case UBIFS_ITYPE_BLK:
return DT_BLK;
case UBIFS_ITYPE_CHR:
return DT_CHR;
case UBIFS_ITYPE_FIFO:
return DT_FIFO;
case UBIFS_ITYPE_SOCK:
return DT_SOCK;
default:
BUG();
}
return 0;
}
/*
* The classical Unix view for directory is that it is a linear array of
* (name, inode number) entries. Linux/VFS assumes this model as well.
* Particularly, 'readdir()' call wants us to return a directory entry offset
* which later may be used to continue 'readdir()'ing the directory or to
* 'seek()' to that specific direntry. Obviously UBIFS does not really fit this
* model because directory entries are identified by keys, which may collide.
*
* UBIFS uses directory entry hash value for directory offsets, so
* 'seekdir()'/'telldir()' may not always work because of possible key
* collisions. But UBIFS guarantees that consecutive 'readdir()' calls work
* properly by means of saving full directory entry name in the private field
* of the file description object.
*
* This means that UBIFS cannot support NFS which requires full
* 'seekdir()'/'telldir()' support.
*/
static int ubifs_readdir(struct file *file, struct dir_context *ctx)
{
int err;
struct qstr nm;
union ubifs_key key;
struct ubifs_dent_node *dent;
struct inode *dir = file_inode(file);
struct ubifs_info *c = dir->i_sb->s_fs_info;
dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, ctx->pos);
if (ctx->pos > UBIFS_S_KEY_HASH_MASK || ctx->pos == 2)
/*
* The directory was seek'ed to a senseless position or there
* are no more entries.
*/
return 0;
if (file->f_version == 0) {
/*
* The file was seek'ed, which means that @file->private_data
* is now invalid. This may also be just the first
* 'ubifs_readdir()' invocation, in which case
* @file->private_data is NULL, and the below code is
* basically a no-op.
*/
kfree(file->private_data);
file->private_data = NULL;
}
/*
* 'generic_file_llseek()' unconditionally sets @file->f_version to
* zero, and we use this for detecting whether the file was seek'ed.
*/
file->f_version = 1;
/* File positions 0 and 1 correspond to "." and ".." */
if (ctx->pos < 2) {
ubifs_assert(!file->private_data);
if (!dir_emit_dots(file, ctx))
return 0;
/* Find the first entry in TNC and save it */
lowest_dent_key(c, &key, dir->i_ino);
nm.name = NULL;
dent = ubifs_tnc_next_ent(c, &key, &nm);
if (IS_ERR(dent)) {
err = PTR_ERR(dent);
goto out;
}
ctx->pos = key_hash_flash(c, &dent->key);
file->private_data = dent;
}
dent = file->private_data;
if (!dent) {
/*
* The directory was seek'ed to and is now readdir'ed.
* Find the entry corresponding to @ctx->pos or the closest one.
*/
dent_key_init_hash(c, &key, dir->i_ino, ctx->pos);
nm.name = NULL;
dent = ubifs_tnc_next_ent(c, &key, &nm);
if (IS_ERR(dent)) {
err = PTR_ERR(dent);
goto out;
}
ctx->pos = key_hash_flash(c, &dent->key);
file->private_data = dent;
}
while (1) {
dbg_gen("feed '%s', ino %llu, new f_pos %#x",
dent->name, (unsigned long long)le64_to_cpu(dent->inum),
key_hash_flash(c, &dent->key));
ubifs_assert(le64_to_cpu(dent->ch.sqnum) >
ubifs_inode(dir)->creat_sqnum);
nm.len = le16_to_cpu(dent->nlen);
if (!dir_emit(ctx, dent->name, nm.len,
le64_to_cpu(dent->inum),
vfs_dent_type(dent->type)))
return 0;
/* Switch to the next entry */
key_read(c, &dent->key, &key);
nm.name = dent->name;
dent = ubifs_tnc_next_ent(c, &key, &nm);
if (IS_ERR(dent)) {
err = PTR_ERR(dent);
goto out;
}
kfree(file->private_data);
ctx->pos = key_hash_flash(c, &dent->key);
file->private_data = dent;
cond_resched();
}
out:
kfree(file->private_data);
file->private_data = NULL;
if (err != -ENOENT) {
ubifs_err(c, "cannot find next direntry, error %d", err);
return err;
}
/* 2 is a special value indicating that there are no more direntries */
ctx->pos = 2;
return 0;
}
/* Free saved readdir() state when the directory is closed */
static int ubifs_dir_release(struct inode *dir, struct file *file)
{
kfree(file->private_data);
file->private_data = NULL;
return 0;
}
/**
* lock_2_inodes - a wrapper for locking two UBIFS inodes.
* @inode1: first inode
* @inode2: second inode
*
* We do not implement any tricks to guarantee strict lock ordering, because
* VFS has already done it for us on the @i_mutex. So this is just a simple
* wrapper function.
*/
static void lock_2_inodes(struct inode *inode1, struct inode *inode2)
{
mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
}
/*
* Initialize the Linux inode and set up the operation vectors.
*
* When reading existing inodes from disk this is called directly from xfs_iget,
* when creating a new inode it is called from xfs_ialloc after setting up the
* inode. These callers have different criteria for clearing XFS_INEW, so leave
* it up to the caller to deal with unlocking the inode appropriately.
*/
void
xfs_setup_inode(
struct xfs_inode *ip)
{
struct inode *inode = &ip->i_vnode;
gfp_t gfp_mask;
inode->i_ino = ip->i_ino;
inode->i_state = I_NEW;
inode_sb_list_add(inode);
/* make the inode look hashed for the writeback code */
hlist_add_fake(&inode->i_hash);
inode->i_mode = ip->i_d.di_mode;
set_nlink(inode, ip->i_d.di_nlink);
inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid);
inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid);
switch (inode->i_mode & S_IFMT) {
case S_IFBLK:
case S_IFCHR:
inode->i_rdev =
MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
sysv_minor(ip->i_df.if_u2.if_rdev));
break;
default:
inode->i_rdev = 0;
break;
}
inode->i_generation = ip->i_d.di_gen;
i_size_write(inode, ip->i_d.di_size);
inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
xfs_diflags_to_iflags(inode, ip);
ip->d_ops = ip->i_mount->m_nondir_inode_ops;
lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
switch (inode->i_mode & S_IFMT) {
case S_IFREG:
inode->i_op = &xfs_inode_operations;
inode->i_fop = &xfs_file_operations;
inode->i_mapping->a_ops = &xfs_address_space_operations;
break;
case S_IFDIR:
lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
inode->i_op = &xfs_dir_ci_inode_operations;
else
inode->i_op = &xfs_dir_inode_operations;
inode->i_fop = &xfs_dir_file_operations;
ip->d_ops = ip->i_mount->m_dir_inode_ops;
break;
case S_IFLNK:
inode->i_op = &xfs_symlink_inode_operations;
if (!(ip->i_df.if_flags & XFS_IFINLINE))
inode->i_mapping->a_ops = &xfs_address_space_operations;
break;
default:
inode->i_op = &xfs_inode_operations;
init_special_inode(inode, inode->i_mode, inode->i_rdev);
break;
}
/*
* Ensure all page cache allocations are done from GFP_NOFS context to
* prevent direct reclaim recursion back into the filesystem and blowing
* stacks or deadlocking.
*/
gfp_mask = mapping_gfp_mask(inode->i_mapping);
mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
/*
* If there is no attribute fork no ACL can exist on this inode,
* and it can't have any file capabilities attached to it either.
*/
if (!XFS_IFORK_Q(ip)) {
inode_has_no_xattr(inode);
cache_no_acl(inode);
}
}
static int squashfs_read_inode_2(struct inode *i, squashfs_inode_t inode)
{
struct super_block *s = i->i_sb;
struct squashfs_sb_info *msblk = s->s_fs_info;
struct squashfs_super_block *sblk = &msblk->sblk;
unsigned int block = SQUASHFS_INODE_BLK(inode) +
sblk->inode_table_start;
unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
unsigned int ino = i->i_ino;
long long next_block;
unsigned int next_offset;
union squashfs_inode_header_2 id, sid;
struct squashfs_base_inode_header_2 *inodeb = &id.base,
*sinodeb = &sid.base;
TRACE("Entered squashfs_iget\n");
if (msblk->swap) {
if (!squashfs_get_cached_block(s, (char *) sinodeb, block,
offset, sizeof(*sinodeb), &next_block,
&next_offset))
goto failed_read;
SQUASHFS_SWAP_BASE_INODE_HEADER_2(inodeb, sinodeb,
sizeof(*sinodeb));
} else if (!squashfs_get_cached_block(s, (char *) inodeb, block,
offset, sizeof(*inodeb), &next_block,
&next_offset))
goto failed_read;
squashfs_new_inode(msblk, i, inodeb, ino);
switch(inodeb->inode_type) {
case SQUASHFS_FILE_TYPE: {
struct squashfs_reg_inode_header_2 *inodep = &id.reg;
struct squashfs_reg_inode_header_2 *sinodep = &sid.reg;
long long frag_blk;
unsigned int frag_size = 0;
if (msblk->swap) {
if (!squashfs_get_cached_block(s, (char *)
sinodep, block, offset,
sizeof(*sinodep), &next_block,
&next_offset))
goto failed_read;
SQUASHFS_SWAP_REG_INODE_HEADER_2(inodep, sinodep);
} else if (!squashfs_get_cached_block(s, (char *)
inodep, block, offset,
sizeof(*inodep), &next_block,
&next_offset))
goto failed_read;
frag_blk = SQUASHFS_INVALID_BLK;
if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
!get_fragment_location_2(s,
inodep->fragment, &frag_blk, &frag_size))
goto failed_read;
i->i_size = inodep->file_size;
i->i_fop = &generic_ro_fops;
i->i_mode |= S_IFREG;
i->i_mtime.tv_sec = inodep->mtime;
i->i_atime.tv_sec = inodep->mtime;
i->i_ctime.tv_sec = inodep->mtime;
i->i_blocks = ((i->i_size - 1) >> 9) + 1;
SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
SQUASHFS_I(i)->start_block = inodep->start_block;
SQUASHFS_I(i)->u.s1.block_list_start = next_block;
SQUASHFS_I(i)->offset = next_offset;
if (sblk->block_size > 4096)
i->i_data.a_ops = &squashfs_aops;
else
i->i_data.a_ops = &squashfs_aops_4K;
TRACE("File inode %x:%x, start_block %x, "
"block_list_start %llx, offset %x\n",
SQUASHFS_INODE_BLK(inode), offset,
inodep->start_block, next_block,
next_offset);
break;
}
case SQUASHFS_DIR_TYPE: {
struct squashfs_dir_inode_header_2 *inodep = &id.dir;
struct squashfs_dir_inode_header_2 *sinodep = &sid.dir;
if (msblk->swap) {
if (!squashfs_get_cached_block(s, (char *)
sinodep, block, offset,
sizeof(*sinodep), &next_block,
&next_offset))
goto failed_read;
SQUASHFS_SWAP_DIR_INODE_HEADER_2(inodep, sinodep);
} else if (!squashfs_get_cached_block(s, (char *)
inodep, block, offset,
sizeof(*inodep), &next_block,
&next_offset))
goto failed_read;
i->i_size = inodep->file_size;
i->i_op = &squashfs_dir_inode_ops_2;
i->i_fop = &squashfs_dir_ops_2;
i->i_mode |= S_IFDIR;
i->i_mtime.tv_sec = inodep->mtime;
i->i_atime.tv_sec = inodep->mtime;
i->i_ctime.tv_sec = inodep->mtime;
SQUASHFS_I(i)->start_block = inodep->start_block;
SQUASHFS_I(i)->offset = inodep->offset;
SQUASHFS_I(i)->u.s2.directory_index_count = 0;
SQUASHFS_I(i)->u.s2.parent_inode = 0;
TRACE("Directory inode %x:%x, start_block %x, offset "
"%x\n", SQUASHFS_INODE_BLK(inode),
offset, inodep->start_block,
inodep->offset);
break;
}
case SQUASHFS_LDIR_TYPE: {
struct squashfs_ldir_inode_header_2 *inodep = &id.ldir;
struct squashfs_ldir_inode_header_2 *sinodep = &sid.ldir;
if (msblk->swap) {
if (!squashfs_get_cached_block(s, (char *)
sinodep, block, offset,
sizeof(*sinodep), &next_block,
&next_offset))
goto failed_read;
SQUASHFS_SWAP_LDIR_INODE_HEADER_2(inodep,
sinodep);
} else if (!squashfs_get_cached_block(s, (char *)
inodep, block, offset,
sizeof(*inodep), &next_block,
&next_offset))
goto failed_read;
i->i_size = inodep->file_size;
i->i_op = &squashfs_dir_inode_ops_2;
i->i_fop = &squashfs_dir_ops_2;
i->i_mode |= S_IFDIR;
i->i_mtime.tv_sec = inodep->mtime;
i->i_atime.tv_sec = inodep->mtime;
i->i_ctime.tv_sec = inodep->mtime;
SQUASHFS_I(i)->start_block = inodep->start_block;
SQUASHFS_I(i)->offset = inodep->offset;
SQUASHFS_I(i)->u.s2.directory_index_start = next_block;
SQUASHFS_I(i)->u.s2.directory_index_offset =
next_offset;
SQUASHFS_I(i)->u.s2.directory_index_count =
inodep->i_count;
SQUASHFS_I(i)->u.s2.parent_inode = 0;
TRACE("Long directory inode %x:%x, start_block %x, "
"offset %x\n",
SQUASHFS_INODE_BLK(inode), offset,
inodep->start_block, inodep->offset);
break;
}
case SQUASHFS_SYMLINK_TYPE: {
struct squashfs_symlink_inode_header_2 *inodep =
&id.symlink;
struct squashfs_symlink_inode_header_2 *sinodep =
&sid.symlink;
if (msblk->swap) {
if (!squashfs_get_cached_block(s, (char *)
sinodep, block, offset,
sizeof(*sinodep), &next_block,
&next_offset))
goto failed_read;
SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(inodep,
sinodep);
} else if (!squashfs_get_cached_block(s, (char *)
inodep, block, offset,
sizeof(*inodep), &next_block,
&next_offset))
goto failed_read;
i->i_size = inodep->symlink_size;
i->i_op = &page_symlink_inode_operations;
i->i_data.a_ops = &squashfs_symlink_aops;
i->i_mode |= S_IFLNK;
SQUASHFS_I(i)->start_block = next_block;
SQUASHFS_I(i)->offset = next_offset;
TRACE("Symbolic link inode %x:%x, start_block %llx, "
"offset %x\n",
SQUASHFS_INODE_BLK(inode), offset,
next_block, next_offset);
break;
}
case SQUASHFS_BLKDEV_TYPE:
case SQUASHFS_CHRDEV_TYPE: {
struct squashfs_dev_inode_header_2 *inodep = &id.dev;
struct squashfs_dev_inode_header_2 *sinodep = &sid.dev;
if (msblk->swap) {
if (!squashfs_get_cached_block(s, (char *)
sinodep, block, offset,
sizeof(*sinodep), &next_block,
&next_offset))
goto failed_read;
SQUASHFS_SWAP_DEV_INODE_HEADER_2(inodep, sinodep);
} else if (!squashfs_get_cached_block(s, (char *)
inodep, block, offset,
sizeof(*inodep), &next_block,
&next_offset))
goto failed_read;
i->i_mode |= (inodeb->inode_type ==
SQUASHFS_CHRDEV_TYPE) ? S_IFCHR :
S_IFBLK;
init_special_inode(i, i->i_mode,
old_decode_dev(inodep->rdev));
TRACE("Device inode %x:%x, rdev %x\n",
SQUASHFS_INODE_BLK(inode), offset,
inodep->rdev);
break;
}
case SQUASHFS_FIFO_TYPE:
case SQUASHFS_SOCKET_TYPE: {
i->i_mode |= (inodeb->inode_type == SQUASHFS_FIFO_TYPE)
? S_IFIFO : S_IFSOCK;
init_special_inode(i, i->i_mode, 0);
break;
}
default:
ERROR("Unknown inode type %d in squashfs_iget!\n",
inodeb->inode_type);
goto failed_read1;
}
return 1;
failed_read:
ERROR("Unable to read inode [%x:%x]\n", block, offset);
failed_read1:
return 0;
}
/*
* Initialize the Linux inode, set up the operation vectors and
* unlock the inode.
*
* When reading existing inodes from disk this is called directly
* from xfs_iget, when creating a new inode it is called from
* xfs_ialloc after setting up the inode.
*
* We are always called with an uninitialised linux inode here.
* We need to initialise the necessary fields and take a reference
* on it.
*/
void
xfs_setup_inode(
struct xfs_inode *ip)
{
struct inode *inode = &ip->i_vnode;
inode->i_ino = ip->i_ino;
inode->i_state = I_NEW;
inode_sb_list_add(inode);
/* make the inode look hashed for the writeback code */
hlist_add_fake(&inode->i_hash);
inode->i_mode = ip->i_d.di_mode;
set_nlink(inode, ip->i_d.di_nlink);
inode->i_uid = ip->i_d.di_uid;
inode->i_gid = ip->i_d.di_gid;
switch (inode->i_mode & S_IFMT) {
case S_IFBLK:
case S_IFCHR:
inode->i_rdev =
MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
sysv_minor(ip->i_df.if_u2.if_rdev));
break;
default:
inode->i_rdev = 0;
break;
}
inode->i_generation = ip->i_d.di_gen;
i_size_write(inode, ip->i_d.di_size);
inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
xfs_diflags_to_iflags(inode, ip);
switch (inode->i_mode & S_IFMT) {
case S_IFREG:
inode->i_op = &xfs_inode_operations;
inode->i_fop = &xfs_file_operations;
inode->i_mapping->a_ops = &xfs_address_space_operations;
break;
case S_IFDIR:
if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
inode->i_op = &xfs_dir_ci_inode_operations;
else
inode->i_op = &xfs_dir_inode_operations;
inode->i_fop = &xfs_dir_file_operations;
break;
case S_IFLNK:
inode->i_op = &xfs_symlink_inode_operations;
if (!(ip->i_df.if_flags & XFS_IFINLINE))
inode->i_mapping->a_ops = &xfs_address_space_operations;
break;
default:
inode->i_op = &xfs_inode_operations;
init_special_inode(inode, inode->i_mode, inode->i_rdev);
break;
}
/*
* If there is no attribute fork no ACL can exist on this inode,
* and it can't have any file capabilities attached to it either.
*/
if (!XFS_IFORK_Q(ip)) {
inode_has_no_xattr(inode);
cache_no_acl(inode);
}
xfs_iflags_clear(ip, XFS_INEW);
barrier();
unlock_new_inode(inode);
}
static struct inode *sdcardfskk_iget(struct super_block *sb,
struct inode *lower_inode)
{
struct sdcardfskk_inode_info *info;
struct inode *inode; /* the new inode to return */
int err;
inode = iget5_locked(sb, /* our superblock */
/*
* hashval: we use inode number, but we can
* also use "(unsigned long)lower_inode"
* instead.
*/
lower_inode->i_ino, /* hashval */
sdcardfskk_inode_test, /* inode comparison function */
sdcardfskk_inode_set, /* inode init function */
lower_inode); /* data passed to test+set fxns */
if (!inode) {
err = -EACCES;
iput(lower_inode);
return ERR_PTR(err);
}
/* if found a cached inode, then just return it */
if (!(inode->i_state & I_NEW))
return inode;
/* initialize new inode */
info = SDCARDFSKK_I(inode);
inode->i_ino = lower_inode->i_ino;
if (!igrab(lower_inode)) {
err = -ESTALE;
return ERR_PTR(err);
}
sdcardfskk_set_lower_inode(inode, lower_inode);
inode->i_version++;
/* use different set of inode ops for symlinks & directories */
if (S_ISDIR(lower_inode->i_mode))
inode->i_op = &sdcardfskk_dir_iops;
else if (S_ISLNK(lower_inode->i_mode))
inode->i_op = &sdcardfskk_symlink_iops;
else
inode->i_op = &sdcardfskk_main_iops;
/* use different set of file ops for directories */
if (S_ISDIR(lower_inode->i_mode))
inode->i_fop = &sdcardfskk_dir_fops;
else
inode->i_fop = &sdcardfskk_main_fops;
inode->i_mapping->a_ops = &sdcardfskk_aops;
inode->i_atime.tv_sec = 0;
inode->i_atime.tv_nsec = 0;
inode->i_mtime.tv_sec = 0;
inode->i_mtime.tv_nsec = 0;
inode->i_ctime.tv_sec = 0;
inode->i_ctime.tv_nsec = 0;
/* properly initialize special inodes */
if (S_ISBLK(lower_inode->i_mode) || S_ISCHR(lower_inode->i_mode) ||
S_ISFIFO(lower_inode->i_mode) || S_ISSOCK(lower_inode->i_mode))
init_special_inode(inode, lower_inode->i_mode,
lower_inode->i_rdev);
/* all well, copy inode attributes, don't need to hold i_mutex here */
sdcardfskk_copy_inode_attr(inode, lower_inode);
fsstack_copy_inode_size(inode, lower_inode);
fix_derived_permission(inode);
unlock_new_inode(inode);
return inode;
}
void hpfs_read_inode(struct inode *i)
{
struct buffer_head *bh;
struct fnode *fnode;
struct super_block *sb = i->i_sb;
struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
void *ea;
int ea_size;
if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) {
/*
*/
make_bad_inode(i);
return;
}
if (hpfs_sb(i->i_sb)->sb_eas) {
if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) {
if (ea_size == 2) {
i->i_uid = le16_to_cpu(*(__le16*)ea);
hpfs_inode->i_ea_uid = 1;
}
kfree(ea);
}
if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) {
if (ea_size == 2) {
i->i_gid = le16_to_cpu(*(__le16*)ea);
hpfs_inode->i_ea_gid = 1;
}
kfree(ea);
}
if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) {
kfree(ea);
i->i_mode = S_IFLNK | 0777;
i->i_op = &page_symlink_inode_operations;
i->i_data.a_ops = &hpfs_symlink_aops;
set_nlink(i, 1);
i->i_size = ea_size;
i->i_blocks = 1;
brelse(bh);
return;
}
if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) {
int rdev = 0;
umode_t mode = hpfs_sb(sb)->sb_mode;
if (ea_size == 2) {
mode = le16_to_cpu(*(__le16*)ea);
hpfs_inode->i_ea_mode = 1;
}
kfree(ea);
i->i_mode = mode;
if (S_ISBLK(mode) || S_ISCHR(mode)) {
if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) {
if (ea_size == 4)
rdev = le32_to_cpu(*(__le32*)ea);
kfree(ea);
}
}
if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
brelse(bh);
set_nlink(i, 1);
i->i_size = 0;
i->i_blocks = 1;
init_special_inode(i, mode,
new_decode_dev(rdev));
return;
}
}
}
if (fnode->dirflag) {
int n_dnodes, n_subdirs;
i->i_mode |= S_IFDIR;
i->i_op = &hpfs_dir_iops;
i->i_fop = &hpfs_dir_ops;
hpfs_inode->i_parent_dir = le32_to_cpu(fnode->up);
hpfs_inode->i_dno = le32_to_cpu(fnode->u.external[0].disk_secno);
if (hpfs_sb(sb)->sb_chk >= 2) {
struct buffer_head *bh0;
if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0);
}
n_dnodes = 0; n_subdirs = 0;
hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL);
i->i_blocks = 4 * n_dnodes;
i->i_size = 2048 * n_dnodes;
set_nlink(i, 2 + n_subdirs);
} else {
i->i_mode |= S_IFREG;
if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111;
i->i_op = &hpfs_file_iops;
i->i_fop = &hpfs_file_ops;
set_nlink(i, 1);
i->i_size = le32_to_cpu(fnode->file_size);
i->i_blocks = ((i->i_size + 511) >> 9) + 1;
i->i_data.a_ops = &hpfs_aops;
hpfs_i(i)->mmu_private = i->i_size;
}
brelse(bh);
}
struct inode *f2fs_iget_nowait(struct super_block *sb, unsigned long ino)
{
struct f2fs_iget_args args = {
.ino = ino,
.on_free = 0
};
struct inode *inode = ilookup5(sb, ino, f2fs_iget_test, &args);
if (inode)
return inode;
if (!args.on_free)
return f2fs_iget(sb, ino);
return ERR_PTR(-ENOENT);
}
static int do_read_inode(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
struct f2fs_inode_info *fi = F2FS_I(inode);
struct page *node_page;
struct f2fs_node *rn;
struct f2fs_inode *ri;
/* Check if ino is within scope */
check_nid_range(sbi, inode->i_ino);
node_page = get_node_page(sbi, inode->i_ino);
if (IS_ERR(node_page))
return PTR_ERR(node_page);
rn = page_address(node_page);
ri = &(rn->i);
inode->i_mode = le16_to_cpu(ri->i_mode);
i_uid_write(inode, le32_to_cpu(ri->i_uid));
i_gid_write(inode, le32_to_cpu(ri->i_gid));
set_nlink(inode, le32_to_cpu(ri->i_links));
inode->i_size = le64_to_cpu(ri->i_size);
inode->i_blocks = le64_to_cpu(ri->i_blocks);
inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
inode->i_generation = le32_to_cpu(ri->i_generation);
fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
fi->i_flags = le32_to_cpu(ri->i_flags);
fi->flags = 0;
fi->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1;
fi->i_advise = ri->i_advise;
fi->i_pino = le32_to_cpu(ri->i_pino);
get_extent_info(&fi->ext, ri->i_ext);
f2fs_put_page(node_page, 1);
return 0;
}
struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct inode *inode;
int ret;
inode = iget_locked(sb, ino);
if (!inode)
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
return inode;
if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
goto make_now;
ret = do_read_inode(inode);
if (ret)
goto bad_inode;
if (!sbi->por_doing && inode->i_nlink == 0) {
ret = -ENOENT;
goto bad_inode;
}
make_now:
if (ino == F2FS_NODE_INO(sbi)) {
inode->i_mapping->a_ops = &f2fs_node_aops;
mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
} else if (ino == F2FS_META_INO(sbi)) {
inode->i_mapping->a_ops = &f2fs_meta_aops;
mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
} else if (S_ISREG(inode->i_mode)) {
inode->i_op = &f2fs_file_inode_operations;
inode->i_fop = &f2fs_file_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &f2fs_dir_inode_operations;
inode->i_fop = &f2fs_dir_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;
mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER_MOVABLE |
__GFP_ZERO);
} else if (S_ISLNK(inode->i_mode)) {
inode->i_op = &f2fs_symlink_inode_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;
} else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
inode->i_op = &f2fs_special_inode_operations;
init_special_inode(inode, inode->i_mode, inode->i_rdev);
} else {
ret = -EIO;
goto bad_inode;
}
unlock_new_inode(inode);
return inode;
bad_inode:
iget_failed(inode);
return ERR_PTR(ret);
}
void update_inode(struct inode *inode, struct page *node_page)
{
struct f2fs_node *rn;
struct f2fs_inode *ri;
wait_on_page_writeback(node_page);
rn = page_address(node_page);
ri = &(rn->i);
ri->i_mode = cpu_to_le16(inode->i_mode);
ri->i_advise = F2FS_I(inode)->i_advise;
ri->i_uid = cpu_to_le32(i_uid_read(inode));
ri->i_gid = cpu_to_le32(i_gid_read(inode));
ri->i_links = cpu_to_le32(inode->i_nlink);
ri->i_size = cpu_to_le64(i_size_read(inode));
ri->i_blocks = cpu_to_le64(inode->i_blocks);
set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
ri->i_generation = cpu_to_le32(inode->i_generation);
set_cold_node(inode, node_page);
set_page_dirty(node_page);
}
int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
struct page *node_page;
bool need_lock = false;
if (inode->i_ino == F2FS_NODE_INO(sbi) ||
inode->i_ino == F2FS_META_INO(sbi))
return 0;
if (wbc)
f2fs_balance_fs(sbi);
node_page = get_node_page(sbi, inode->i_ino);
if (IS_ERR(node_page))
return PTR_ERR(node_page);
if (!PageDirty(node_page)) {
need_lock = true;
f2fs_put_page(node_page, 1);
mutex_lock(&sbi->write_inode);
node_page = get_node_page(sbi, inode->i_ino);
if (IS_ERR(node_page)) {
mutex_unlock(&sbi->write_inode);
return PTR_ERR(node_page);
}
}
update_inode(inode, node_page);
f2fs_put_page(node_page, 1);
if (need_lock)
mutex_unlock(&sbi->write_inode);
return 0;
}
/*
* Called at the last iput() if i_nlink is zero
*/
void f2fs_evict_inode(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
truncate_inode_pages(&inode->i_data, 0);
if (inode->i_ino == F2FS_NODE_INO(sbi) ||
inode->i_ino == F2FS_META_INO(sbi))
goto no_delete;
BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents));
remove_dirty_dir_inode(inode);
if (inode->i_nlink || is_bad_inode(inode))
goto no_delete;
set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
i_size_write(inode, 0);
if (F2FS_HAS_BLOCKS(inode))
f2fs_truncate(inode);
remove_inode_page(inode);
no_delete:
clear_inode(inode);
}
static void fill_in_inode(struct inode *tmp_inode,
FILE_DIRECTORY_INFO *pfindData, int *pobject_type, int isNewInode)
{
loff_t local_size;
struct timespec local_mtime;
struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
__u32 attr = le32_to_cpu(pfindData->ExtFileAttributes);
__u64 allocation_size = le64_to_cpu(pfindData->AllocationSize);
__u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
cifsInfo->cifsAttrs = attr;
cifsInfo->time = jiffies;
/* save mtime and size */
local_mtime = tmp_inode->i_mtime;
local_size = tmp_inode->i_size;
/* Linux can not store file creation time unfortunately so ignore it */
tmp_inode->i_atime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
tmp_inode->i_mtime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
tmp_inode->i_ctime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
/* treat dos attribute of read-only as read-only mode bit e.g. 555? */
/* 2767 perms - indicate mandatory locking */
/* BB fill in uid and gid here? with help from winbind?
or retrieve from NTFS stream extended attribute */
if (atomic_read(&cifsInfo->inUse) == 0) {
tmp_inode->i_uid = cifs_sb->mnt_uid;
tmp_inode->i_gid = cifs_sb->mnt_gid;
/* set default mode. will override for dirs below */
tmp_inode->i_mode = cifs_sb->mnt_file_mode;
}
if (attr & ATTR_DIRECTORY) {
*pobject_type = DT_DIR;
/* override default perms since we do not lock dirs */
if(atomic_read(&cifsInfo->inUse) == 0) {
tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
}
tmp_inode->i_mode |= S_IFDIR;
/* we no longer mark these because we could not follow them */
/* } else if (attr & ATTR_REPARSE) {
*pobject_type = DT_LNK;
tmp_inode->i_mode |= S_IFLNK; */
} else {
*pobject_type = DT_REG;
tmp_inode->i_mode |= S_IFREG;
if (attr & ATTR_READONLY)
tmp_inode->i_mode &= ~(S_IWUGO);
} /* could add code here - to validate if device or weird share type? */
/* can not fill in nlink here as in qpathinfo version and Unx search */
if (atomic_read(&cifsInfo->inUse) == 0) {
atomic_set(&cifsInfo->inUse, 1);
}
if (is_size_safe_to_change(cifsInfo)) {
/* can not safely change the file size here if the
client is writing to it due to potential races */
i_size_write(tmp_inode, end_of_file);
/* 512 bytes (2**9) is the fake blocksize that must be used */
/* for this calculation, even though the reported blocksize is larger */
tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
}
if (allocation_size < end_of_file)
cFYI(1, ("May be sparse file, allocation less than file size"));
cFYI(1,
("File Size %ld and blocks %ld and blocksize %ld",
(unsigned long)tmp_inode->i_size, tmp_inode->i_blocks,
tmp_inode->i_blksize));
if (S_ISREG(tmp_inode->i_mode)) {
cFYI(1, ("File inode"));
tmp_inode->i_op = &cifs_file_inode_ops;
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
tmp_inode->i_fop = &cifs_file_direct_ops;
else
tmp_inode->i_fop = &cifs_file_ops;
tmp_inode->i_data.a_ops = &cifs_addr_ops;
if(isNewInode)
return; /* No sense invalidating pages for new inode since we
have not started caching readahead file data yet */
if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
(local_size == tmp_inode->i_size)) {
cFYI(1, ("inode exists but unchanged"));
} else {
/* file may have changed on server */
cFYI(1, ("invalidate inode, readdir detected change"));
invalidate_remote_inode(tmp_inode);
}
} else if (S_ISDIR(tmp_inode->i_mode)) {
cFYI(1, ("Directory inode"));
tmp_inode->i_op = &cifs_dir_inode_ops;
tmp_inode->i_fop = &cifs_dir_ops;
} else if (S_ISLNK(tmp_inode->i_mode)) {
cFYI(1, ("Symbolic Link inode"));
tmp_inode->i_op = &cifs_symlink_inode_ops;
} else {
cFYI(1, ("Init special inode"));
init_special_inode(tmp_inode, tmp_inode->i_mode,
tmp_inode->i_rdev);
}
}
int v9fs_init_inode(struct v9fs_session_info *v9ses,
struct inode *inode, int mode, dev_t rdev)
{
int err = 0;
inode_init_owner(inode, NULL, mode);
inode->i_blocks = 0;
inode->i_rdev = rdev;
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
inode->i_mapping->a_ops = &v9fs_addr_operations;
switch (mode & S_IFMT) {
case S_IFIFO:
case S_IFBLK:
case S_IFCHR:
case S_IFSOCK:
if (v9fs_proto_dotl(v9ses)) {
inode->i_op = &v9fs_file_inode_operations_dotl;
inode->i_fop = &v9fs_file_operations_dotl;
} else if (v9fs_proto_dotu(v9ses)) {
inode->i_op = &v9fs_file_inode_operations;
inode->i_fop = &v9fs_file_operations;
} else {
P9_DPRINTK(P9_DEBUG_ERROR,
"special files without extended mode\n");
err = -EINVAL;
goto error;
}
init_special_inode(inode, inode->i_mode, inode->i_rdev);
break;
case S_IFREG:
if (v9fs_proto_dotl(v9ses)) {
inode->i_op = &v9fs_file_inode_operations_dotl;
if (v9ses->cache)
inode->i_fop =
&v9fs_cached_file_operations_dotl;
else
inode->i_fop = &v9fs_file_operations_dotl;
} else {
inode->i_op = &v9fs_file_inode_operations;
if (v9ses->cache)
inode->i_fop = &v9fs_cached_file_operations;
else
inode->i_fop = &v9fs_file_operations;
}
break;
case S_IFLNK:
if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with "
"legacy protocol.\n");
err = -EINVAL;
goto error;
}
if (v9fs_proto_dotl(v9ses))
inode->i_op = &v9fs_symlink_inode_operations_dotl;
else
inode->i_op = &v9fs_symlink_inode_operations;
break;
case S_IFDIR:
inc_nlink(inode);
if (v9fs_proto_dotl(v9ses))
inode->i_op = &v9fs_dir_inode_operations_dotl;
else if (v9fs_proto_dotu(v9ses))
inode->i_op = &v9fs_dir_inode_operations_dotu;
else
inode->i_op = &v9fs_dir_inode_operations;
if (v9fs_proto_dotl(v9ses))
inode->i_fop = &v9fs_dir_operations_dotl;
else
inode->i_fop = &v9fs_dir_operations;
break;
default:
P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
mode, mode & S_IFMT);
err = -EINVAL;
goto error;
}
error:
return err;
}
static void unix_fill_in_inode(struct inode *tmp_inode,
FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode)
{
loff_t local_size;
struct timespec local_mtime;
struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
__u32 type = le32_to_cpu(pfindData->Type);
__u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
__u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
cifsInfo->time = jiffies;
atomic_inc(&cifsInfo->inUse);
/* save mtime and size */
local_mtime = tmp_inode->i_mtime;
local_size = tmp_inode->i_size;
tmp_inode->i_atime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
tmp_inode->i_mtime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
tmp_inode->i_ctime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
if (type == UNIX_FILE) {
*pobject_type = DT_REG;
tmp_inode->i_mode |= S_IFREG;
} else if (type == UNIX_SYMLINK) {
*pobject_type = DT_LNK;
tmp_inode->i_mode |= S_IFLNK;
} else if (type == UNIX_DIR) {
*pobject_type = DT_DIR;
tmp_inode->i_mode |= S_IFDIR;
} else if (type == UNIX_CHARDEV) {
*pobject_type = DT_CHR;
tmp_inode->i_mode |= S_IFCHR;
tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
le64_to_cpu(pfindData->DevMinor) & MINORMASK);
} else if (type == UNIX_BLOCKDEV) {
*pobject_type = DT_BLK;
tmp_inode->i_mode |= S_IFBLK;
tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
le64_to_cpu(pfindData->DevMinor) & MINORMASK);
} else if (type == UNIX_FIFO) {
*pobject_type = DT_FIFO;
tmp_inode->i_mode |= S_IFIFO;
} else if (type == UNIX_SOCKET) {
*pobject_type = DT_SOCK;
tmp_inode->i_mode |= S_IFSOCK;
}
tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
if (is_size_safe_to_change(cifsInfo)) {
/* can not safely change the file size here if the
client is writing to it due to potential races */
i_size_write(tmp_inode,end_of_file);
/* 512 bytes (2**9) is the fake blocksize that must be used */
/* for this calculation, not the real blocksize */
tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
}
if (S_ISREG(tmp_inode->i_mode)) {
cFYI(1, ("File inode"));
tmp_inode->i_op = &cifs_file_inode_ops;
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
tmp_inode->i_fop = &cifs_file_direct_ops;
else
tmp_inode->i_fop = &cifs_file_ops;
tmp_inode->i_data.a_ops = &cifs_addr_ops;
if(isNewInode)
return; /* No sense invalidating pages for new inode since we
have not started caching readahead file data yet */
if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
(local_size == tmp_inode->i_size)) {
cFYI(1, ("inode exists but unchanged"));
} else {
/* file may have changed on server */
cFYI(1, ("invalidate inode, readdir detected change"));
invalidate_remote_inode(tmp_inode);
}
} else if (S_ISDIR(tmp_inode->i_mode)) {
cFYI(1, ("Directory inode"));
tmp_inode->i_op = &cifs_dir_inode_ops;
tmp_inode->i_fop = &cifs_dir_ops;
} else if (S_ISLNK(tmp_inode->i_mode)) {
cFYI(1, ("Symbolic Link inode"));
tmp_inode->i_op = &cifs_symlink_inode_ops;
/* tmp_inode->i_fop = *//* do not need to set to anything */
} else {
cFYI(1, ("Special inode"));
init_special_inode(tmp_inode, tmp_inode->i_mode,
tmp_inode->i_rdev);
}
}
/*
* NAME: jfs_mknod
*
* FUNCTION: Create a special file (device)
*/
static int jfs_mknod(struct inode *dir, struct dentry *dentry,
int mode, dev_t rdev)
{
struct jfs_inode_info *jfs_ip;
struct btstack btstack;
struct component_name dname;
ino_t ino;
struct inode *ip;
struct inode *iplist[2];
int rc;
tid_t tid;
struct tblock *tblk;
if (!new_valid_dev(rdev))
return -EINVAL;
jfs_info("jfs_mknod: %s", dentry->d_name.name);
dquot_initialize(dir);
if ((rc = get_UCSname(&dname, dentry)))
goto out;
ip = ialloc(dir, mode);
if (IS_ERR(ip)) {
rc = PTR_ERR(ip);
goto out1;
}
jfs_ip = JFS_IP(ip);
tid = txBegin(dir->i_sb, 0);
mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT);
mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD);
rc = jfs_init_acl(tid, ip, dir);
if (rc)
goto out3;
rc = jfs_init_security(tid, ip, dir, &dentry->d_name);
if (rc) {
txAbort(tid, 0);
goto out3;
}
if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) {
txAbort(tid, 0);
goto out3;
}
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_CREATE;
tblk->ino = ip->i_ino;
tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
ino = ip->i_ino;
if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) {
txAbort(tid, 0);
goto out3;
}
ip->i_op = &jfs_file_inode_operations;
jfs_ip->dev = new_encode_dev(rdev);
init_special_inode(ip, ip->i_mode, rdev);
mark_inode_dirty(ip);
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
mark_inode_dirty(dir);
iplist[0] = dir;
iplist[1] = ip;
rc = txCommit(tid, 2, iplist, 0);
out3:
txEnd(tid);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
mutex_unlock(&JFS_IP(dir)->commit_mutex);
if (rc) {
free_ea_wmap(ip);
clear_nlink(ip);
unlock_new_inode(ip);
iput(ip);
} else {
d_instantiate(dentry, ip);
unlock_new_inode(ip);
}
out1:
free_UCSname(&dname);
out:
jfs_info("jfs_mknod: returning %d", rc);
return rc;
}
int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
int create_ino)
{
struct super_block *sb;
struct ocfs2_super *osb;
int status = -EINVAL;
mlog_entry("(0x%p, size:%llu)\n", inode,
(unsigned long long)le64_to_cpu(fe->i_size));
sb = inode->i_sb;
osb = OCFS2_SB(sb);
/* this means that read_inode cannot create a superblock inode
* today. change if needed. */
if (!OCFS2_IS_VALID_DINODE(fe) ||
!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
mlog(0, "Invalid dinode: i_ino=%lu, i_blkno=%llu, "
"signature = %.*s, flags = 0x%x\n",
inode->i_ino,
(unsigned long long)le64_to_cpu(fe->i_blkno), 7,
fe->i_signature, le32_to_cpu(fe->i_flags));
goto bail;
}
if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) {
mlog(ML_ERROR, "file entry generation does not match "
"superblock! osb->fs_generation=%x, "
"fe->i_fs_generation=%x\n",
osb->fs_generation, le32_to_cpu(fe->i_fs_generation));
goto bail;
}
OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
inode->i_version = 1;
inode->i_generation = le32_to_cpu(fe->i_generation);
inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
inode->i_mode = le16_to_cpu(fe->i_mode);
inode->i_uid = le32_to_cpu(fe->i_uid);
inode->i_gid = le32_to_cpu(fe->i_gid);
/* Fast symlinks will have i_size but no allocated clusters. */
if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
inode->i_blocks = 0;
else
inode->i_blocks = ocfs2_inode_sector_count(inode);
inode->i_mapping->a_ops = &ocfs2_aops;
inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
mlog(ML_ERROR,
"ip_blkno %llu != i_blkno %llu!\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(unsigned long long)le64_to_cpu(fe->i_blkno));
inode->i_nlink = le16_to_cpu(fe->i_links_count);
if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
} else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
} else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
/* we can't actually hit this as read_inode can't
* handle superblocks today ;-) */
BUG();
}
switch (inode->i_mode & S_IFMT) {
case S_IFREG:
inode->i_fop = &ocfs2_fops;
inode->i_op = &ocfs2_file_iops;
i_size_write(inode, le64_to_cpu(fe->i_size));
break;
case S_IFDIR:
inode->i_op = &ocfs2_dir_iops;
inode->i_fop = &ocfs2_dops;
i_size_write(inode, le64_to_cpu(fe->i_size));
break;
case S_IFLNK:
if (ocfs2_inode_is_fast_symlink(inode))
inode->i_op = &ocfs2_fast_symlink_inode_operations;
else
inode->i_op = &ocfs2_symlink_inode_operations;
i_size_write(inode, le64_to_cpu(fe->i_size));
break;
default:
inode->i_op = &ocfs2_special_file_iops;
init_special_inode(inode, inode->i_mode,
inode->i_rdev);
break;
}
if (create_ino) {
inode->i_ino = ino_from_blkno(inode->i_sb,
le64_to_cpu(fe->i_blkno));
/*
* If we ever want to create system files from kernel,
* the generation argument to
* ocfs2_inode_lock_res_init() will have to change.
*/
BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
OCFS2_LOCK_TYPE_META, 0, inode);
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
OCFS2_LOCK_TYPE_OPEN, 0, inode);
}
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
OCFS2_LOCK_TYPE_RW, inode->i_generation,
inode);
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres,
OCFS2_LOCK_TYPE_DATA, inode->i_generation,
inode);
ocfs2_set_inode_flags(inode);
status = 0;
bail:
mlog_exit(status);
return status;
}
static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct inode *inode = old_dentry->d_inode;
struct ubifs_inode *ui = ubifs_inode(inode);
struct ubifs_inode *dir_ui = ubifs_inode(dir);
int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2,
.dirtied_ino_d = ALIGN(ui->data_len, 8) };
/*
* Budget request settings: new direntry, changing the target inode,
* changing the parent inode.
*/
dbg_gen("dent '%.*s' to ino %lu (nlink %d) in dir ino %lu",
dentry->d_name.len, dentry->d_name.name, inode->i_ino,
inode->i_nlink, dir->i_ino);
ubifs_assert(mutex_is_locked(&dir->i_mutex));
ubifs_assert(mutex_is_locked(&inode->i_mutex));
err = dbg_check_synced_i_size(c, inode);
if (err)
return err;
err = ubifs_budget_space(c, &req);
if (err)
return err;
lock_2_inodes(dir, inode);
inc_nlink(inode);
ihold(inode);
inode->i_ctime = ubifs_current_time(inode);
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
if (err)
goto out_cancel;
unlock_2_inodes(dir, inode);
ubifs_release_budget(c, &req);
d_instantiate(dentry, inode);
return 0;
out_cancel:
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
drop_nlink(inode);
unlock_2_inodes(dir, inode);
ubifs_release_budget(c, &req);
iput(inode);
return err;
}
static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
{
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct inode *inode = dentry->d_inode;
struct ubifs_inode *dir_ui = ubifs_inode(dir);
int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
int err, budgeted = 1;
struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
unsigned int saved_nlink = inode->i_nlink;
/*
* Budget request settings: deletion direntry, deletion inode (+1 for
* @dirtied_ino), changing the parent directory inode. If budgeting
* fails, go ahead anyway because we have extra space reserved for
* deletions.
*/
dbg_gen("dent '%.*s' from ino %lu (nlink %d) in dir ino %lu",
dentry->d_name.len, dentry->d_name.name, inode->i_ino,
inode->i_nlink, dir->i_ino);
ubifs_assert(mutex_is_locked(&dir->i_mutex));
ubifs_assert(mutex_is_locked(&inode->i_mutex));
err = dbg_check_synced_i_size(c, inode);
if (err)
return err;
err = ubifs_budget_space(c, &req);
if (err) {
if (err != -ENOSPC)
return err;
budgeted = 0;
}
lock_2_inodes(dir, inode);
inode->i_ctime = ubifs_current_time(dir);
drop_nlink(inode);
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0);
if (err)
goto out_cancel;
unlock_2_inodes(dir, inode);
if (budgeted)
ubifs_release_budget(c, &req);
else {
/* We've deleted something - clean the "no space" flags */
c->bi.nospace = c->bi.nospace_rp = 0;
smp_wmb();
}
return 0;
out_cancel:
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
set_nlink(inode, saved_nlink);
unlock_2_inodes(dir, inode);
if (budgeted)
ubifs_release_budget(c, &req);
return err;
}
/**
* check_dir_empty - check if a directory is empty or not.
* @c: UBIFS file-system description object
* @dir: VFS inode object of the directory to check
*
* This function checks if directory @dir is empty. Returns zero if the
* directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
* in case of of errors.
*/
static int check_dir_empty(struct ubifs_info *c, struct inode *dir)
{
struct qstr nm = { .name = NULL };
struct ubifs_dent_node *dent;
union ubifs_key key;
int err;
lowest_dent_key(c, &key, dir->i_ino);
dent = ubifs_tnc_next_ent(c, &key, &nm);
if (IS_ERR(dent)) {
err = PTR_ERR(dent);
if (err == -ENOENT)
err = 0;
} else {
kfree(dent);
err = -ENOTEMPTY;
}
return err;
}
static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
{
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct inode *inode = dentry->d_inode;
int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
int err, budgeted = 1;
struct ubifs_inode *dir_ui = ubifs_inode(dir);
struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
/*
* Budget request settings: deletion direntry, deletion inode and
* changing the parent inode. If budgeting fails, go ahead anyway
* because we have extra space reserved for deletions.
*/
dbg_gen("directory '%.*s', ino %lu in dir ino %lu", dentry->d_name.len,
dentry->d_name.name, inode->i_ino, dir->i_ino);
ubifs_assert(mutex_is_locked(&dir->i_mutex));
ubifs_assert(mutex_is_locked(&inode->i_mutex));
err = check_dir_empty(c, dentry->d_inode);
if (err)
return err;
err = ubifs_budget_space(c, &req);
if (err) {
if (err != -ENOSPC)
return err;
budgeted = 0;
}
lock_2_inodes(dir, inode);
inode->i_ctime = ubifs_current_time(dir);
clear_nlink(inode);
drop_nlink(dir);
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0);
if (err)
goto out_cancel;
unlock_2_inodes(dir, inode);
if (budgeted)
ubifs_release_budget(c, &req);
else {
/* We've deleted something - clean the "no space" flags */
c->bi.nospace = c->bi.nospace_rp = 0;
smp_wmb();
}
return 0;
out_cancel:
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
inc_nlink(dir);
set_nlink(inode, 2);
unlock_2_inodes(dir, inode);
if (budgeted)
ubifs_release_budget(c, &req);
return err;
}
static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
struct inode *inode;
struct ubifs_inode *dir_ui = ubifs_inode(dir);
struct ubifs_info *c = dir->i_sb->s_fs_info;
int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
/*
* Budget request settings: new inode, new direntry and changing parent
* directory inode.
*/
dbg_gen("dent '%.*s', mode %#hx in dir ino %lu",
dentry->d_name.len, dentry->d_name.name, mode, dir->i_ino);
err = ubifs_budget_space(c, &req);
if (err)
return err;
inode = ubifs_new_inode(c, dir, S_IFDIR | mode);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out_budg;
}
mutex_lock(&dir_ui->ui_mutex);
insert_inode_hash(inode);
inc_nlink(inode);
inc_nlink(dir);
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
if (err) {
ubifs_err("cannot create directory, error %d", err);
goto out_cancel;
}
mutex_unlock(&dir_ui->ui_mutex);
ubifs_release_budget(c, &req);
d_instantiate(dentry, inode);
return 0;
out_cancel:
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
drop_nlink(dir);
mutex_unlock(&dir_ui->ui_mutex);
make_bad_inode(inode);
iput(inode);
out_budg:
ubifs_release_budget(c, &req);
return err;
}
static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
umode_t mode, dev_t rdev)
{
struct inode *inode;
struct ubifs_inode *ui;
struct ubifs_inode *dir_ui = ubifs_inode(dir);
struct ubifs_info *c = dir->i_sb->s_fs_info;
union ubifs_dev_desc *dev = NULL;
int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
int err, devlen = 0;
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
.new_ino_d = ALIGN(devlen, 8),
.dirtied_ino = 1 };
/*
* Budget request settings: new inode, new direntry and changing parent
* directory inode.
*/
dbg_gen("dent '%.*s' in dir ino %lu",
dentry->d_name.len, dentry->d_name.name, dir->i_ino);
if (!new_valid_dev(rdev))
return -EINVAL;
if (S_ISBLK(mode) || S_ISCHR(mode)) {
dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
if (!dev)
return -ENOMEM;
devlen = ubifs_encode_dev(dev, rdev);
}
err = ubifs_budget_space(c, &req);
if (err) {
kfree(dev);
return err;
}
inode = ubifs_new_inode(c, dir, mode);
if (IS_ERR(inode)) {
kfree(dev);
err = PTR_ERR(inode);
goto out_budg;
}
init_special_inode(inode, inode->i_mode, rdev);
inode->i_size = ubifs_inode(inode)->ui_size = devlen;
ui = ubifs_inode(inode);
ui->data = dev;
ui->data_len = devlen;
mutex_lock(&dir_ui->ui_mutex);
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
if (err)
goto out_cancel;
mutex_unlock(&dir_ui->ui_mutex);
ubifs_release_budget(c, &req);
insert_inode_hash(inode);
d_instantiate(dentry, inode);
return 0;
out_cancel:
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
mutex_unlock(&dir_ui->ui_mutex);
make_bad_inode(inode);
iput(inode);
out_budg:
ubifs_release_budget(c, &req);
return err;
}
static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
const char *symname)
{
struct inode *inode;
struct ubifs_inode *ui;
struct ubifs_inode *dir_ui = ubifs_inode(dir);
struct ubifs_info *c = dir->i_sb->s_fs_info;
int err, len = strlen(symname);
int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
.new_ino_d = ALIGN(len, 8),
.dirtied_ino = 1 };
/*
* Budget request settings: new inode, new direntry and changing parent
* directory inode.
*/
dbg_gen("dent '%.*s', target '%s' in dir ino %lu", dentry->d_name.len,
dentry->d_name.name, symname, dir->i_ino);
if (len > UBIFS_MAX_INO_DATA)
return -ENAMETOOLONG;
err = ubifs_budget_space(c, &req);
if (err)
return err;
inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out_budg;
}
ui = ubifs_inode(inode);
ui->data = kmalloc(len + 1, GFP_NOFS);
if (!ui->data) {
err = -ENOMEM;
goto out_inode;
}
memcpy(ui->data, symname, len);
((char *)ui->data)[len] = '\0';
/*
* The terminating zero byte is not written to the flash media and it
* is put just to make later in-memory string processing simpler. Thus,
* data length is @len, not @len + %1.
*/
ui->data_len = len;
inode->i_size = ubifs_inode(inode)->ui_size = len;
mutex_lock(&dir_ui->ui_mutex);
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
if (err)
goto out_cancel;
mutex_unlock(&dir_ui->ui_mutex);
ubifs_release_budget(c, &req);
insert_inode_hash(inode);
d_instantiate(dentry, inode);
return 0;
out_cancel:
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
mutex_unlock(&dir_ui->ui_mutex);
out_inode:
make_bad_inode(inode);
iput(inode);
out_budg:
ubifs_release_budget(c, &req);
return err;
}
/**
* lock_3_inodes - a wrapper for locking three UBIFS inodes.
* @inode1: first inode
* @inode2: second inode
* @inode3: third inode
*
* This function is used for 'ubifs_rename()' and @inode1 may be the same as
* @inode2 whereas @inode3 may be %NULL.
*
* We do not implement any tricks to guarantee strict lock ordering, because
* VFS has already done it for us on the @i_mutex. So this is just a simple
* wrapper function.
*/
static void lock_3_inodes(struct inode *inode1, struct inode *inode2,
struct inode *inode3)
{
mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
if (inode2 != inode1)
mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
if (inode3)
mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
}
/**
* unlock_3_inodes - a wrapper for unlocking three UBIFS inodes for rename.
* @inode1: first inode
* @inode2: second inode
* @inode3: third inode
*/
static void unlock_3_inodes(struct inode *inode1, struct inode *inode2,
struct inode *inode3)
{
if (inode3)
mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
if (inode1 != inode2)
mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
}
static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct ubifs_info *c = old_dir->i_sb->s_fs_info;
struct inode *old_inode = old_dentry->d_inode;
struct inode *new_inode = new_dentry->d_inode;
struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
int err, release, sync = 0, move = (new_dir != old_dir);
int is_dir = S_ISDIR(old_inode->i_mode);
int unlink = !!new_inode;
int new_sz = CALC_DENT_SIZE(new_dentry->d_name.len);
int old_sz = CALC_DENT_SIZE(old_dentry->d_name.len);
struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
.dirtied_ino = 3 };
struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
.dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
struct timespec time;
unsigned int saved_nlink = 0;
/*
* Budget request settings: deletion direntry, new direntry, removing
* the old inode, and changing old and new parent directory inodes.
*
* However, this operation also marks the target inode as dirty and
* does not write it, so we allocate budget for the target inode
* separately.
*/
dbg_gen("dent '%.*s' ino %lu in dir ino %lu to dent '%.*s' in "
"dir ino %lu", old_dentry->d_name.len, old_dentry->d_name.name,
old_inode->i_ino, old_dir->i_ino, new_dentry->d_name.len,
new_dentry->d_name.name, new_dir->i_ino);
ubifs_assert(mutex_is_locked(&old_dir->i_mutex));
ubifs_assert(mutex_is_locked(&new_dir->i_mutex));
if (unlink)
ubifs_assert(mutex_is_locked(&new_inode->i_mutex));
if (unlink && is_dir) {
err = check_dir_empty(c, new_inode);
if (err)
return err;
}
err = ubifs_budget_space(c, &req);
if (err)
return err;
err = ubifs_budget_space(c, &ino_req);
if (err) {
ubifs_release_budget(c, &req);
return err;
}
lock_3_inodes(old_dir, new_dir, new_inode);
/*
* Like most other Unix systems, set the @i_ctime for inodes on a
* rename.
*/
time = ubifs_current_time(old_dir);
old_inode->i_ctime = time;
/* We must adjust parent link count when renaming directories */
if (is_dir) {
if (move) {
/*
* @old_dir loses a link because we are moving
* @old_inode to a different directory.
*/
drop_nlink(old_dir);
/*
* @new_dir only gains a link if we are not also
* overwriting an existing directory.
*/
if (!unlink)
inc_nlink(new_dir);
} else {
/*
* @old_inode is not moving to a different directory,
* but @old_dir still loses a link if we are
* overwriting an existing directory.
*/
if (unlink)
drop_nlink(old_dir);
}
}
old_dir->i_size -= old_sz;
ubifs_inode(old_dir)->ui_size = old_dir->i_size;
old_dir->i_mtime = old_dir->i_ctime = time;
new_dir->i_mtime = new_dir->i_ctime = time;
/*
* And finally, if we unlinked a direntry which happened to have the
* same name as the moved direntry, we have to decrement @i_nlink of
* the unlinked inode and change its ctime.
*/
if (unlink) {
/*
* Directories cannot have hard-links, so if this is a
* directory, just clear @i_nlink.
*/
saved_nlink = new_inode->i_nlink;
if (is_dir)
clear_nlink(new_inode);
else
drop_nlink(new_inode);
new_inode->i_ctime = time;
} else {
new_dir->i_size += new_sz;
ubifs_inode(new_dir)->ui_size = new_dir->i_size;
}
/*
* Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
* is dirty, because this will be done later on at the end of
* 'ubifs_rename()'.
*/
if (IS_SYNC(old_inode)) {
sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
if (unlink && IS_SYNC(new_inode))
sync = 1;
}
err = ubifs_jnl_rename(c, old_dir, old_dentry, new_dir, new_dentry,
sync);
if (err)
goto out_cancel;
unlock_3_inodes(old_dir, new_dir, new_inode);
ubifs_release_budget(c, &req);
mutex_lock(&old_inode_ui->ui_mutex);
release = old_inode_ui->dirty;
mark_inode_dirty_sync(old_inode);
mutex_unlock(&old_inode_ui->ui_mutex);
if (release)
ubifs_release_budget(c, &ino_req);
if (IS_SYNC(old_inode))
err = old_inode->i_sb->s_op->write_inode(old_inode, NULL);
return err;
out_cancel:
if (unlink) {
set_nlink(new_inode, saved_nlink);
} else {
new_dir->i_size -= new_sz;
ubifs_inode(new_dir)->ui_size = new_dir->i_size;
}
old_dir->i_size += old_sz;
ubifs_inode(old_dir)->ui_size = old_dir->i_size;
if (is_dir) {
if (move) {
inc_nlink(old_dir);
if (!unlink)
drop_nlink(new_dir);
} else {
if (unlink)
inc_nlink(old_dir);
}
}
unlock_3_inodes(old_dir, new_dir, new_inode);
ubifs_release_budget(c, &ino_req);
ubifs_release_budget(c, &req);
return err;
}
int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
loff_t size;
struct inode *inode = dentry->d_inode;
struct ubifs_inode *ui = ubifs_inode(inode);
mutex_lock(&ui->ui_mutex);
stat->dev = inode->i_sb->s_dev;
stat->ino = inode->i_ino;
stat->mode = inode->i_mode;
stat->nlink = inode->i_nlink;
stat->uid = inode->i_uid;
stat->gid = inode->i_gid;
stat->rdev = inode->i_rdev;
stat->atime = inode->i_atime;
stat->mtime = inode->i_mtime;
stat->ctime = inode->i_ctime;
stat->blksize = UBIFS_BLOCK_SIZE;
stat->size = ui->ui_size;
/*
* Unfortunately, the 'stat()' system call was designed for block
* device based file systems, and it is not appropriate for UBIFS,
* because UBIFS does not have notion of "block". For example, it is
* difficult to tell how many block a directory takes - it actually
* takes less than 300 bytes, but we have to round it to block size,
* which introduces large mistake. This makes utilities like 'du' to
* report completely senseless numbers. This is the reason why UBIFS
* goes the same way as JFFS2 - it reports zero blocks for everything
* but regular files, which makes more sense than reporting completely
* wrong sizes.
*/
if (S_ISREG(inode->i_mode)) {
size = ui->xattr_size;
size += stat->size;
size = ALIGN(size, UBIFS_BLOCK_SIZE);
/*
* Note, user-space expects 512-byte blocks count irrespectively
* of what was reported in @stat->size.
*/
stat->blocks = size >> 9;
} else
stat->blocks = 0;
mutex_unlock(&ui->ui_mutex);
return 0;
}
const struct inode_operations ubifs_dir_inode_operations = {
.lookup = ubifs_lookup,
.create = ubifs_create,
.link = ubifs_link,
.symlink = ubifs_symlink,
.unlink = ubifs_unlink,
.mkdir = ubifs_mkdir,
.rmdir = ubifs_rmdir,
.mknod = ubifs_mknod,
.rename = ubifs_rename,
.setattr = ubifs_setattr,
.getattr = ubifs_getattr,
#ifdef CONFIG_UBIFS_FS_XATTR
.setxattr = ubifs_setxattr,
.getxattr = ubifs_getxattr,
.listxattr = ubifs_listxattr,
.removexattr = ubifs_removexattr,
#endif
};
const struct file_operations ubifs_dir_operations = {
.llseek = ubifs_dir_llseek,
.release = ubifs_dir_release,
.read = generic_read_dir,
.readdir = ubifs_readdir,
.fsync = ubifs_fsync,
.unlocked_ioctl = ubifs_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ubifs_compat_ioctl,
#endif
};
struct dentry *ext2_get_parent(struct dentry *child)
{
struct qstr dotdot = {.name = "..", .len = 2};
unsigned long ino = ext2_inode_by_name(child->d_inode, &dotdot);
if (!ino)
return ERR_PTR(-ENOENT);
return d_obtain_alias(ext2_iget(child->d_inode->i_sb, ino));
}
/*
* By the time this is called, we already have created
* the directory cache entry for the new file, but it
* is so far negative - it has no inode.
*
* If the create succeeds, we fill in the inode information
* with d_instantiate().
*/
static int ext2_create (struct inode * dir, struct dentry * dentry, int mode, struct nameidata *nd)
{
struct inode *inode;
dquot_initialize(dir);
inode = ext2_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
inode->i_op = &ext2_file_inode_operations;
if (ext2_use_xip(inode->i_sb)) {
inode->i_mapping->a_ops = &ext2_aops_xip;
inode->i_fop = &ext2_xip_file_operations;
} else if (test_opt(inode->i_sb, NOBH)) {
inode->i_mapping->a_ops = &ext2_nobh_aops;
inode->i_fop = &ext2_file_operations;
} else {
inode->i_mapping->a_ops = &ext2_aops;
inode->i_fop = &ext2_file_operations;
}
mark_inode_dirty(inode);
return ext2_add_nondir(dentry, inode);
}
static int ext2_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_t rdev)
{
struct inode * inode;
int err;
if (!new_valid_dev(rdev))
return -EINVAL;
dquot_initialize(dir);
inode = ext2_new_inode (dir, mode);
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
init_special_inode(inode, inode->i_mode, rdev);
#ifdef CONFIG_EXT2_FS_XATTR
inode->i_op = &ext2_special_inode_operations;
#endif
mark_inode_dirty(inode);
err = ext2_add_nondir(dentry, inode);
}
return err;
}
static int ext2_symlink (struct inode * dir, struct dentry * dentry,
const char * symname)
{
struct super_block * sb = dir->i_sb;
int err = -ENAMETOOLONG;
unsigned l = strlen(symname)+1;
struct inode * inode;
if (l > sb->s_blocksize)
goto out;
dquot_initialize(dir);
inode = ext2_new_inode (dir, S_IFLNK | S_IRWXUGO);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out;
if (l > sizeof (EXT2_I(inode)->i_data)) {
/* slow symlink */
inode->i_op = &ext2_symlink_inode_operations;
if (test_opt(inode->i_sb, NOBH))
inode->i_mapping->a_ops = &ext2_nobh_aops;
else
inode->i_mapping->a_ops = &ext2_aops;
err = page_symlink(inode, symname, l);
if (err)
goto out_fail;
} else {
/* fast symlink */
inode->i_op = &ext2_fast_symlink_inode_operations;
memcpy((char*)(EXT2_I(inode)->i_data),symname,l);
inode->i_size = l-1;
}
mark_inode_dirty(inode);
err = ext2_add_nondir(dentry, inode);
out:
return err;
out_fail:
inode_dec_link_count(inode);
unlock_new_inode(inode);
iput (inode);
goto out;
}
static int ext2_link (struct dentry * old_dentry, struct inode * dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
int err;
if (inode->i_nlink >= EXT2_LINK_MAX)
return -EMLINK;
dquot_initialize(dir);
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
ihold(inode);
err = ext2_add_link(dentry, inode);
if (!err) {
d_instantiate(dentry, inode);
return 0;
}
inode_dec_link_count(inode);
iput(inode);
return err;
}
static int ext2_mkdir(struct inode * dir, struct dentry * dentry, int mode)
{
struct inode * inode;
int err = -EMLINK;
if (dir->i_nlink >= EXT2_LINK_MAX)
goto out;
dquot_initialize(dir);
inode_inc_link_count(dir);
inode = ext2_new_inode (dir, S_IFDIR | mode);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_dir;
inode->i_op = &ext2_dir_inode_operations;
inode->i_fop = &ext2_dir_operations;
if (test_opt(inode->i_sb, NOBH))
inode->i_mapping->a_ops = &ext2_nobh_aops;
else
inode->i_mapping->a_ops = &ext2_aops;
inode_inc_link_count(inode);
err = ext2_make_empty(inode, dir);
if (err)
goto out_fail;
err = ext2_add_link(dentry, inode);
if (err)
goto out_fail;
d_instantiate(dentry, inode);
unlock_new_inode(inode);
out:
return err;
out_fail:
inode_dec_link_count(inode);
inode_dec_link_count(inode);
unlock_new_inode(inode);
iput(inode);
out_dir:
inode_dec_link_count(dir);
goto out;
}
static int ext2_unlink(struct inode * dir, struct dentry *dentry)
{
struct inode * inode = dentry->d_inode;
struct ext2_dir_entry_2 * de;
struct page * page;
int err = -ENOENT;
dquot_initialize(dir);
de = ext2_find_entry (dir, &dentry->d_name, &page);
if (!de)
goto out;
err = ext2_delete_entry (de, page);
if (err)
goto out;
inode->i_ctime = dir->i_ctime;
inode_dec_link_count(inode);
err = 0;
out:
return err;
}
static int ext2_rmdir (struct inode * dir, struct dentry *dentry)
{
struct inode * inode = dentry->d_inode;
int err = -ENOTEMPTY;
if (ext2_empty_dir(inode)) {
err = ext2_unlink(dir, dentry);
if (!err) {
inode->i_size = 0;
inode_dec_link_count(inode);
inode_dec_link_count(dir);
}
}
return err;
}
static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry,
struct inode * new_dir, struct dentry * new_dentry )
{
struct inode * old_inode = old_dentry->d_inode;
struct inode * new_inode = new_dentry->d_inode;
struct page * dir_page = NULL;
struct ext2_dir_entry_2 * dir_de = NULL;
struct page * old_page;
struct ext2_dir_entry_2 * old_de;
int err = -ENOENT;
dquot_initialize(old_dir);
dquot_initialize(new_dir);
old_de = ext2_find_entry (old_dir, &old_dentry->d_name, &old_page);
if (!old_de)
goto out;
if (S_ISDIR(old_inode->i_mode)) {
err = -EIO;
dir_de = ext2_dotdot(old_inode, &dir_page);
if (!dir_de)
goto out_old;
}
if (new_inode) {
struct page *new_page;
struct ext2_dir_entry_2 *new_de;
err = -ENOTEMPTY;
if (dir_de && !ext2_empty_dir (new_inode))
goto out_dir;
err = -ENOENT;
new_de = ext2_find_entry (new_dir, &new_dentry->d_name, &new_page);
if (!new_de)
goto out_dir;
ext2_set_link(new_dir, new_de, new_page, old_inode, 1);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
drop_nlink(new_inode);
inode_dec_link_count(new_inode);
} else {
if (dir_de) {
err = -EMLINK;
if (new_dir->i_nlink >= EXT2_LINK_MAX)
goto out_dir;
}
err = ext2_add_link(new_dentry, old_inode);
if (err)
goto out_dir;
if (dir_de)
inode_inc_link_count(new_dir);
}
/*
* Like most other Unix systems, set the ctime for inodes on a
* rename.
*/
old_inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(old_inode);
ext2_delete_entry (old_de, old_page);
if (dir_de) {
if (old_dir != new_dir)
ext2_set_link(old_inode, dir_de, dir_page, new_dir, 0);
else {
kunmap(dir_page);
page_cache_release(dir_page);
}
inode_dec_link_count(old_dir);
}
return 0;
out_dir:
if (dir_de) {
kunmap(dir_page);
page_cache_release(dir_page);
}
out_old:
kunmap(old_page);
page_cache_release(old_page);
out:
return err;
}
const struct inode_operations ext2_dir_inode_operations = {
.create = ext2_create,
.lookup = ext2_lookup,
.link = ext2_link,
.unlink = ext2_unlink,
.symlink = ext2_symlink,
.mkdir = ext2_mkdir,
.rmdir = ext2_rmdir,
.mknod = ext2_mknod,
.rename = ext2_rename,
#ifdef CONFIG_EXT2_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext2_listxattr,
.removexattr = generic_removexattr,
#endif
.setattr = ext2_setattr,
.check_acl = ext2_check_acl,
};
const struct inode_operations ext2_special_inode_operations = {
#ifdef CONFIG_EXT2_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext2_listxattr,
.removexattr = generic_removexattr,
#endif
.setattr = ext2_setattr,
.check_acl = ext2_check_acl,
};
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, int rdev)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
unsigned short dev;
int devlen = 0;
__u32 alloclen, phys_ofs;
__u32 writtenlen;
int ret;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
if (S_ISBLK(mode) || S_ISCHR(mode)) {
dev = (MAJOR(to_kdev_t(rdev)) << 8) | MINOR(to_kdev_t(rdev));
devlen = sizeof(dev);
}
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_file_inode_operations;
init_special_inode(inode, inode->i_mode, rdev);
f = JFFS2_INODE_INFO(inode);
ri->dsize = ri->csize = devlen;
ri->totlen = sizeof(*ri) + ri->csize;
ri->hdr_crc = crc32(0, ri, sizeof(struct jffs2_unknown_node)-4);
ri->compr = JFFS2_COMPR_NONE;
ri->data_crc = crc32(0, &dev, devlen);
ri->node_crc = crc32(0, ri, sizeof(*ri)-8);
fn = jffs2_write_dnode(inode, ri, (char *)&dev, devlen, phys_ofs, &writtenlen);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
up(&f->sem);
/* Work out where to put the dirent node now. */
writtenlen = (writtenlen+3)&~3;
phys_ofs += writtenlen;
alloclen -= writtenlen;
if (alloclen < sizeof(*rd)+namelen) {
/* Not enough space left in this chunk. Get some more */
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
jffs2_clear_inode(inode);
return ret;
}
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = JFFS2_MAGIC_BITMASK;
rd->nodetype = JFFS2_NODETYPE_DIRENT;
rd->totlen = sizeof(*rd) + namelen;
rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4);
rd->pino = dir_i->i_ino;
rd->version = ++dir_f->highest_version;
rd->ino = inode->i_ino;
rd->mctime = CURRENT_TIME;
rd->nsize = namelen;
/* XXX: This is ugly. */
rd->type = (mode & S_IFMT) >> 12;
rd->node_crc = crc32(0, rd, sizeof(*rd)-8);
rd->name_crc = crc32(0, dentry->d_name.name, namelen);
fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen);
jffs2_complete_reservation(c);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_free_raw_dirent(rd);
up(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
dir_i->i_mtime = dir_i->i_ctime = rd->mctime;
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
d_instantiate(dentry, inode);
return 0;
}
/*
* Initialise VFS inode by reading inode from inode table (compressed
* metadata). The format and amount of data read depends on type.
*/
int squashfs_read_inode(struct inode *inode, long long ino)
{
struct super_block *sb = inode->i_sb;
struct squashfs_sb_info *msblk = sb->s_fs_info;
u64 block = SQUASHFS_INODE_BLK(ino) + msblk->inode_table;
int err, type, offset = SQUASHFS_INODE_OFFSET(ino);
union squashfs_inode squashfs_ino;
struct squashfs_base_inode *sqshb_ino = &squashfs_ino.base;
int xattr_id = SQUASHFS_INVALID_XATTR;
TRACE("Entered squashfs_read_inode\n");
/*
* Read inode base common to all inode types.
*/
err = squashfs_read_metadata(sb, sqshb_ino, &block,
&offset, sizeof(*sqshb_ino));
if (err < 0)
goto failed_read;
err = squashfs_new_inode(sb, inode, sqshb_ino);
if (err)
goto failed_read;
block = SQUASHFS_INODE_BLK(ino) + msblk->inode_table;
offset = SQUASHFS_INODE_OFFSET(ino);
type = le16_to_cpu(sqshb_ino->inode_type);
switch (type) {
case SQUASHFS_REG_TYPE: {
unsigned int frag_offset, frag;
int frag_size;
u64 frag_blk;
struct squashfs_reg_inode *sqsh_ino = &squashfs_ino.reg;
err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
sizeof(*sqsh_ino));
if (err < 0)
goto failed_read;
frag = le32_to_cpu(sqsh_ino->fragment);
if (frag != SQUASHFS_INVALID_FRAG) {
frag_offset = le32_to_cpu(sqsh_ino->offset);
frag_size = squashfs_frag_lookup(sb, frag, &frag_blk);
if (frag_size < 0) {
err = frag_size;
goto failed_read;
}
} else {
frag_blk = SQUASHFS_INVALID_BLK;
frag_size = 0;
frag_offset = 0;
}
set_nlink(inode, 1);
inode->i_size = le32_to_cpu(sqsh_ino->file_size);
inode->i_fop = &generic_ro_fops;
inode->i_mode |= S_IFREG;
inode->i_blocks = ((inode->i_size - 1) >> 9) + 1;
squashfs_i(inode)->fragment_block = frag_blk;
squashfs_i(inode)->fragment_size = frag_size;
squashfs_i(inode)->fragment_offset = frag_offset;
squashfs_i(inode)->start = le32_to_cpu(sqsh_ino->start_block);
squashfs_i(inode)->block_list_start = block;
squashfs_i(inode)->offset = offset;
inode->i_data.a_ops = &squashfs_aops;
TRACE("File inode %x:%x, start_block %llx, block_list_start "
"%llx, offset %x\n", SQUASHFS_INODE_BLK(ino),
offset, squashfs_i(inode)->start, block, offset);
break;
}
case SQUASHFS_LREG_TYPE: {
unsigned int frag_offset, frag;
int frag_size;
u64 frag_blk;
struct squashfs_lreg_inode *sqsh_ino = &squashfs_ino.lreg;
err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
sizeof(*sqsh_ino));
if (err < 0)
goto failed_read;
frag = le32_to_cpu(sqsh_ino->fragment);
if (frag != SQUASHFS_INVALID_FRAG) {
frag_offset = le32_to_cpu(sqsh_ino->offset);
frag_size = squashfs_frag_lookup(sb, frag, &frag_blk);
if (frag_size < 0) {
err = frag_size;
goto failed_read;
}
} else {
frag_blk = SQUASHFS_INVALID_BLK;
frag_size = 0;
frag_offset = 0;
}
xattr_id = le32_to_cpu(sqsh_ino->xattr);
set_nlink(inode, le32_to_cpu(sqsh_ino->nlink));
inode->i_size = le64_to_cpu(sqsh_ino->file_size);
inode->i_op = &squashfs_inode_ops;
inode->i_fop = &generic_ro_fops;
inode->i_mode |= S_IFREG;
inode->i_blocks = (inode->i_size -
le64_to_cpu(sqsh_ino->sparse) + 511) >> 9;
squashfs_i(inode)->fragment_block = frag_blk;
squashfs_i(inode)->fragment_size = frag_size;
squashfs_i(inode)->fragment_offset = frag_offset;
squashfs_i(inode)->start = le64_to_cpu(sqsh_ino->start_block);
squashfs_i(inode)->block_list_start = block;
squashfs_i(inode)->offset = offset;
inode->i_data.a_ops = &squashfs_aops;
TRACE("File inode %x:%x, start_block %llx, block_list_start "
"%llx, offset %x\n", SQUASHFS_INODE_BLK(ino),
offset, squashfs_i(inode)->start, block, offset);
break;
}
case SQUASHFS_DIR_TYPE: {
struct squashfs_dir_inode *sqsh_ino = &squashfs_ino.dir;
err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
sizeof(*sqsh_ino));
if (err < 0)
goto failed_read;
set_nlink(inode, le32_to_cpu(sqsh_ino->nlink));
inode->i_size = le16_to_cpu(sqsh_ino->file_size);
inode->i_op = &squashfs_dir_inode_ops;
inode->i_fop = &squashfs_dir_ops;
inode->i_mode |= S_IFDIR;
squashfs_i(inode)->start = le32_to_cpu(sqsh_ino->start_block);
squashfs_i(inode)->offset = le16_to_cpu(sqsh_ino->offset);
squashfs_i(inode)->dir_idx_cnt = 0;
squashfs_i(inode)->parent = le32_to_cpu(sqsh_ino->parent_inode);
TRACE("Directory inode %x:%x, start_block %llx, offset %x\n",
SQUASHFS_INODE_BLK(ino), offset,
squashfs_i(inode)->start,
le16_to_cpu(sqsh_ino->offset));
break;
}
case SQUASHFS_LDIR_TYPE: {
struct squashfs_ldir_inode *sqsh_ino = &squashfs_ino.ldir;
err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
sizeof(*sqsh_ino));
if (err < 0)
goto failed_read;
xattr_id = le32_to_cpu(sqsh_ino->xattr);
set_nlink(inode, le32_to_cpu(sqsh_ino->nlink));
inode->i_size = le32_to_cpu(sqsh_ino->file_size);
inode->i_op = &squashfs_dir_inode_ops;
inode->i_fop = &squashfs_dir_ops;
inode->i_mode |= S_IFDIR;
squashfs_i(inode)->start = le32_to_cpu(sqsh_ino->start_block);
squashfs_i(inode)->offset = le16_to_cpu(sqsh_ino->offset);
squashfs_i(inode)->dir_idx_start = block;
squashfs_i(inode)->dir_idx_offset = offset;
squashfs_i(inode)->dir_idx_cnt = le16_to_cpu(sqsh_ino->i_count);
squashfs_i(inode)->parent = le32_to_cpu(sqsh_ino->parent_inode);
TRACE("Long directory inode %x:%x, start_block %llx, offset "
"%x\n", SQUASHFS_INODE_BLK(ino), offset,
squashfs_i(inode)->start,
le16_to_cpu(sqsh_ino->offset));
break;
}
case SQUASHFS_SYMLINK_TYPE:
case SQUASHFS_LSYMLINK_TYPE: {
struct squashfs_symlink_inode *sqsh_ino = &squashfs_ino.symlink;
err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
sizeof(*sqsh_ino));
if (err < 0)
goto failed_read;
set_nlink(inode, le32_to_cpu(sqsh_ino->nlink));
inode->i_size = le32_to_cpu(sqsh_ino->symlink_size);
inode->i_op = &squashfs_symlink_inode_ops;
inode->i_data.a_ops = &squashfs_symlink_aops;
inode->i_mode |= S_IFLNK;
squashfs_i(inode)->start = block;
squashfs_i(inode)->offset = offset;
if (type == SQUASHFS_LSYMLINK_TYPE) {
__le32 xattr;
err = squashfs_read_metadata(sb, NULL, &block,
&offset, inode->i_size);
if (err < 0)
goto failed_read;
err = squashfs_read_metadata(sb, &xattr, &block,
&offset, sizeof(xattr));
if (err < 0)
goto failed_read;
xattr_id = le32_to_cpu(xattr);
}
TRACE("Symbolic link inode %x:%x, start_block %llx, offset "
"%x\n", SQUASHFS_INODE_BLK(ino), offset,
block, offset);
break;
}
case SQUASHFS_BLKDEV_TYPE:
case SQUASHFS_CHRDEV_TYPE: {
struct squashfs_dev_inode *sqsh_ino = &squashfs_ino.dev;
unsigned int rdev;
err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
sizeof(*sqsh_ino));
if (err < 0)
goto failed_read;
if (type == SQUASHFS_CHRDEV_TYPE)
inode->i_mode |= S_IFCHR;
else
inode->i_mode |= S_IFBLK;
set_nlink(inode, le32_to_cpu(sqsh_ino->nlink));
rdev = le32_to_cpu(sqsh_ino->rdev);
init_special_inode(inode, inode->i_mode, new_decode_dev(rdev));
TRACE("Device inode %x:%x, rdev %x\n",
SQUASHFS_INODE_BLK(ino), offset, rdev);
break;
}
case SQUASHFS_LBLKDEV_TYPE:
case SQUASHFS_LCHRDEV_TYPE: {
struct squashfs_ldev_inode *sqsh_ino = &squashfs_ino.ldev;
unsigned int rdev;
err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
sizeof(*sqsh_ino));
if (err < 0)
goto failed_read;
if (type == SQUASHFS_LCHRDEV_TYPE)
inode->i_mode |= S_IFCHR;
else
inode->i_mode |= S_IFBLK;
xattr_id = le32_to_cpu(sqsh_ino->xattr);
inode->i_op = &squashfs_inode_ops;
set_nlink(inode, le32_to_cpu(sqsh_ino->nlink));
rdev = le32_to_cpu(sqsh_ino->rdev);
init_special_inode(inode, inode->i_mode, new_decode_dev(rdev));
TRACE("Device inode %x:%x, rdev %x\n",
SQUASHFS_INODE_BLK(ino), offset, rdev);
break;
}
case SQUASHFS_FIFO_TYPE:
case SQUASHFS_SOCKET_TYPE: {
struct squashfs_ipc_inode *sqsh_ino = &squashfs_ino.ipc;
err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
sizeof(*sqsh_ino));
if (err < 0)
goto failed_read;
if (type == SQUASHFS_FIFO_TYPE)
inode->i_mode |= S_IFIFO;
else
inode->i_mode |= S_IFSOCK;
set_nlink(inode, le32_to_cpu(sqsh_ino->nlink));
init_special_inode(inode, inode->i_mode, 0);
break;
}
case SQUASHFS_LFIFO_TYPE:
case SQUASHFS_LSOCKET_TYPE: {
struct squashfs_lipc_inode *sqsh_ino = &squashfs_ino.lipc;
err = squashfs_read_metadata(sb, sqsh_ino, &block, &offset,
sizeof(*sqsh_ino));
if (err < 0)
goto failed_read;
if (type == SQUASHFS_LFIFO_TYPE)
inode->i_mode |= S_IFIFO;
else
inode->i_mode |= S_IFSOCK;
xattr_id = le32_to_cpu(sqsh_ino->xattr);
inode->i_op = &squashfs_inode_ops;
set_nlink(inode, le32_to_cpu(sqsh_ino->nlink));
init_special_inode(inode, inode->i_mode, 0);
break;
}
default:
ERROR("Unknown inode type %d in squashfs_iget!\n", type);
return -EINVAL;
}
if (xattr_id != SQUASHFS_INVALID_XATTR && msblk->xattr_id_table) {
err = squashfs_xattr_lookup(sb, xattr_id,
&squashfs_i(inode)->xattr_count,
&squashfs_i(inode)->xattr_size,
&squashfs_i(inode)->xattr);
if (err < 0)
goto failed_read;
inode->i_blocks += ((squashfs_i(inode)->xattr_size - 1) >> 9)
+ 1;
} else
static int hpfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
{
const unsigned char *name = dentry->d_name.name;
unsigned len = dentry->d_name.len;
struct buffer_head *bh;
struct fnode *fnode;
fnode_secno fno;
int r;
struct hpfs_dirent dee;
struct inode *result = NULL;
int err;
if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM;
hpfs_lock(dir->i_sb);
err = -ENOSPC;
fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
if (!fnode)
goto bail;
memset(&dee, 0, sizeof dee);
if (!(mode & 0222)) dee.read_only = 1;
dee.archive = 1;
dee.hidden = name[0] == '.';
dee.fnode = cpu_to_le32(fno);
dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
result = new_inode(dir->i_sb);
if (!result)
goto bail1;
hpfs_init_inode(result);
result->i_ino = fno;
hpfs_i(result)->i_parent_dir = dir->i_ino;
result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
result->i_ctime.tv_nsec = 0;
result->i_mtime.tv_nsec = 0;
result->i_atime.tv_nsec = 0;
hpfs_i(result)->i_ea_size = 0;
result->i_uid = current_fsuid();
result->i_gid = current_fsgid();
set_nlink(result, 1);
result->i_size = 0;
result->i_blocks = 1;
init_special_inode(result, mode, rdev);
r = hpfs_add_dirent(dir, name, len, &dee);
if (r == 1)
goto bail2;
if (r == -1) {
err = -EEXIST;
goto bail2;
}
fnode->len = len;
memcpy(fnode->name, name, len > 15 ? 15 : len);
fnode->up = cpu_to_le32(dir->i_ino);
mark_buffer_dirty(bh);
insert_inode_hash(result);
hpfs_write_inode_nolock(result);
hpfs_update_directory_times(dir);
d_instantiate(dentry, result);
brelse(bh);
hpfs_unlock(dir->i_sb);
return 0;
bail2:
iput(result);
bail1:
brelse(bh);
hpfs_free_sectors(dir->i_sb, fno, 1);
bail:
hpfs_unlock(dir->i_sb);
return err;
}
void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
int create_ino)
{
struct super_block *sb;
struct ocfs2_super *osb;
int use_plocks = 1;
sb = inode->i_sb;
osb = OCFS2_SB(sb);
if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
use_plocks = 0;
/*
* These have all been checked by ocfs2_read_inode_block() or set
* by ocfs2_mknod_locked(), so a failure is a code bug.
*/
BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode
cannot create a superblock
inode today. change if
that is needed. */
BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
inode->i_version = 1;
inode->i_generation = le32_to_cpu(fe->i_generation);
inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
inode->i_mode = le16_to_cpu(fe->i_mode);
i_uid_write(inode, le32_to_cpu(fe->i_uid));
i_gid_write(inode, le32_to_cpu(fe->i_gid));
/* Fast symlinks will have i_size but no allocated clusters. */
if (S_ISLNK(inode->i_mode) && !fe->i_clusters) {
inode->i_blocks = 0;
inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
} else {
inode->i_blocks = ocfs2_inode_sector_count(inode);
inode->i_mapping->a_ops = &ocfs2_aops;
}
inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
mlog(ML_ERROR,
"ip_blkno %llu != i_blkno %llu!\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(unsigned long long)le64_to_cpu(fe->i_blkno));
set_nlink(inode, ocfs2_read_links_count(fe));
trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno,
le32_to_cpu(fe->i_flags));
if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
inode->i_flags |= S_NOQUOTA;
}
if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
} else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
} else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
inode->i_flags |= S_NOQUOTA;
} else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
/* we can't actually hit this as read_inode can't
* handle superblocks today ;-) */
BUG();
}
switch (inode->i_mode & S_IFMT) {
case S_IFREG:
if (use_plocks)
inode->i_fop = &ocfs2_fops;
else
inode->i_fop = &ocfs2_fops_no_plocks;
inode->i_op = &ocfs2_file_iops;
i_size_write(inode, le64_to_cpu(fe->i_size));
break;
case S_IFDIR:
inode->i_op = &ocfs2_dir_iops;
if (use_plocks)
inode->i_fop = &ocfs2_dops;
else
inode->i_fop = &ocfs2_dops_no_plocks;
i_size_write(inode, le64_to_cpu(fe->i_size));
OCFS2_I(inode)->ip_dir_lock_gen = 1;
break;
case S_IFLNK:
inode->i_op = &ocfs2_symlink_inode_operations;
i_size_write(inode, le64_to_cpu(fe->i_size));
break;
default:
inode->i_op = &ocfs2_special_file_iops;
init_special_inode(inode, inode->i_mode,
inode->i_rdev);
break;
}
if (create_ino) {
inode->i_ino = ino_from_blkno(inode->i_sb,
le64_to_cpu(fe->i_blkno));
/*
* If we ever want to create system files from kernel,
* the generation argument to
* ocfs2_inode_lock_res_init() will have to change.
*/
BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
OCFS2_LOCK_TYPE_META, 0, inode);
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
OCFS2_LOCK_TYPE_OPEN, 0, inode);
}
ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
OCFS2_LOCK_TYPE_RW, inode->i_generation,
inode);
ocfs2_set_inode_flags(inode);
OCFS2_I(inode)->ip_last_used_slot = 0;
OCFS2_I(inode)->ip_last_used_group = 0;
if (S_ISDIR(inode->i_mode))
ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
OCFS2_RESV_FLAG_DIR);
}
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
{
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct jffs2_raw_inode *ri;
struct jffs2_raw_dirent *rd;
struct jffs2_full_dnode *fn;
struct jffs2_full_dirent *fd;
int namelen;
jint16_t dev;
int devlen = 0;
uint32_t alloclen, phys_ofs;
int ret;
if (!old_valid_dev(rdev))
return -EINVAL;
ri = jffs2_alloc_raw_inode();
if (!ri)
return -ENOMEM;
c = JFFS2_SB_INFO(dir_i->i_sb);
if (S_ISBLK(mode) || S_ISCHR(mode)) {
dev = cpu_to_je16(old_encode_dev(rdev));
devlen = sizeof(dev);
}
/* Try to reserve enough space for both node and dirent.
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
jffs2_complete_reservation(c);
return PTR_ERR(inode);
}
inode->i_op = &jffs2_file_inode_operations;
init_special_inode(inode, inode->i_mode, rdev);
f = JFFS2_INODE_INFO(inode);
ri->dsize = ri->csize = cpu_to_je32(devlen);
ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
ri->compr = JFFS2_COMPR_NONE;
ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, phys_ofs, ALLOC_NORMAL);
jffs2_free_raw_inode(ri);
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/
f->metadata = fn;
up(&f->sem);
jffs2_complete_reservation(c);
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
/* Eep. */
jffs2_clear_inode(inode);
return ret;
}
rd = jffs2_alloc_raw_dirent();
if (!rd) {
/* Argh. Now we treat it like a normal delete */
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
}
dir_f = JFFS2_INODE_INFO(dir_i);
down(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
rd->pino = cpu_to_je32(dir_i->i_ino);
rd->version = cpu_to_je32(++dir_f->highest_version);
rd->ino = cpu_to_je32(inode->i_ino);
rd->mctime = cpu_to_je32(get_seconds());
rd->nsize = namelen;
/* XXX: This is ugly. */
rd->type = (mode & S_IFMT) >> 12;
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, phys_ofs, ALLOC_NORMAL);
if (IS_ERR(fd)) {
/* dirent failed to write. Delete the inode normally
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
up(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
jffs2_free_raw_dirent(rd);
/* Link the fd into the inode's list, obsoleting an old
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
up(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
return 0;
}
static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct inode *inode = d_inode(old_dentry);
struct ubifs_inode *ui = ubifs_inode(inode);
struct ubifs_inode *dir_ui = ubifs_inode(dir);
int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2,
.dirtied_ino_d = ALIGN(ui->data_len, 8) };
struct fscrypt_name nm;
/*
* Budget request settings: new direntry, changing the target inode,
* changing the parent inode.
*/
dbg_gen("dent '%pd' to ino %lu (nlink %d) in dir ino %lu",
dentry, inode->i_ino,
inode->i_nlink, dir->i_ino);
ubifs_assert(inode_is_locked(dir));
ubifs_assert(inode_is_locked(inode));
if (ubifs_crypt_is_encrypted(dir) &&
!fscrypt_has_permitted_context(dir, inode))
return -EPERM;
err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
if (err)
return err;
err = dbg_check_synced_i_size(c, inode);
if (err)
goto out_fname;
err = ubifs_budget_space(c, &req);
if (err)
goto out_fname;
lock_2_inodes(dir, inode);
/* Handle O_TMPFILE corner case, it is allowed to link a O_TMPFILE. */
if (inode->i_nlink == 0)
ubifs_delete_orphan(c, inode->i_ino);
inc_nlink(inode);
ihold(inode);
inode->i_ctime = current_time(inode);
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
if (err)
goto out_cancel;
unlock_2_inodes(dir, inode);
ubifs_release_budget(c, &req);
d_instantiate(dentry, inode);
fscrypt_free_filename(&nm);
return 0;
out_cancel:
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
drop_nlink(inode);
if (inode->i_nlink == 0)
ubifs_add_orphan(c, inode->i_ino);
unlock_2_inodes(dir, inode);
ubifs_release_budget(c, &req);
iput(inode);
out_fname:
fscrypt_free_filename(&nm);
return err;
}
static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
{
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct inode *inode = d_inode(dentry);
struct ubifs_inode *dir_ui = ubifs_inode(dir);
int err, sz_change, budgeted = 1;
struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
unsigned int saved_nlink = inode->i_nlink;
struct fscrypt_name nm;
/*
* Budget request settings: deletion direntry, deletion inode (+1 for
* @dirtied_ino), changing the parent directory inode. If budgeting
* fails, go ahead anyway because we have extra space reserved for
* deletions.
*/
dbg_gen("dent '%pd' from ino %lu (nlink %d) in dir ino %lu",
dentry, inode->i_ino,
inode->i_nlink, dir->i_ino);
if (ubifs_crypt_is_encrypted(dir)) {
err = fscrypt_get_encryption_info(dir);
if (err && err != -ENOKEY)
return err;
}
err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
if (err)
return err;
sz_change = CALC_DENT_SIZE(fname_len(&nm));
ubifs_assert(inode_is_locked(dir));
ubifs_assert(inode_is_locked(inode));
err = dbg_check_synced_i_size(c, inode);
if (err)
goto out_fname;
err = ubifs_budget_space(c, &req);
if (err) {
if (err != -ENOSPC)
goto out_fname;
budgeted = 0;
}
lock_2_inodes(dir, inode);
inode->i_ctime = current_time(dir);
drop_nlink(inode);
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
if (err)
goto out_cancel;
unlock_2_inodes(dir, inode);
if (budgeted)
ubifs_release_budget(c, &req);
else {
/* We've deleted something - clean the "no space" flags */
c->bi.nospace = c->bi.nospace_rp = 0;
smp_wmb();
}
fscrypt_free_filename(&nm);
return 0;
out_cancel:
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
set_nlink(inode, saved_nlink);
unlock_2_inodes(dir, inode);
if (budgeted)
ubifs_release_budget(c, &req);
out_fname:
fscrypt_free_filename(&nm);
return err;
}
/**
* check_dir_empty - check if a directory is empty or not.
* @dir: VFS inode object of the directory to check
*
* This function checks if directory @dir is empty. Returns zero if the
* directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
* in case of of errors.
*/
int ubifs_check_dir_empty(struct inode *dir)
{
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct fscrypt_name nm = { 0 };
struct ubifs_dent_node *dent;
union ubifs_key key;
int err;
lowest_dent_key(c, &key, dir->i_ino);
dent = ubifs_tnc_next_ent(c, &key, &nm);
if (IS_ERR(dent)) {
err = PTR_ERR(dent);
if (err == -ENOENT)
err = 0;
} else {
kfree(dent);
err = -ENOTEMPTY;
}
return err;
}
static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
{
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct inode *inode = d_inode(dentry);
int err, sz_change, budgeted = 1;
struct ubifs_inode *dir_ui = ubifs_inode(dir);
struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
struct fscrypt_name nm;
/*
* Budget request settings: deletion direntry, deletion inode and
* changing the parent inode. If budgeting fails, go ahead anyway
* because we have extra space reserved for deletions.
*/
dbg_gen("directory '%pd', ino %lu in dir ino %lu", dentry,
inode->i_ino, dir->i_ino);
ubifs_assert(inode_is_locked(dir));
ubifs_assert(inode_is_locked(inode));
err = ubifs_check_dir_empty(d_inode(dentry));
if (err)
return err;
if (ubifs_crypt_is_encrypted(dir)) {
err = fscrypt_get_encryption_info(dir);
if (err && err != -ENOKEY)
return err;
}
err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
if (err)
return err;
sz_change = CALC_DENT_SIZE(fname_len(&nm));
err = ubifs_budget_space(c, &req);
if (err) {
if (err != -ENOSPC)
goto out_fname;
budgeted = 0;
}
lock_2_inodes(dir, inode);
inode->i_ctime = current_time(dir);
clear_nlink(inode);
drop_nlink(dir);
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
if (err)
goto out_cancel;
unlock_2_inodes(dir, inode);
if (budgeted)
ubifs_release_budget(c, &req);
else {
/* We've deleted something - clean the "no space" flags */
c->bi.nospace = c->bi.nospace_rp = 0;
smp_wmb();
}
fscrypt_free_filename(&nm);
return 0;
out_cancel:
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
inc_nlink(dir);
set_nlink(inode, 2);
unlock_2_inodes(dir, inode);
if (budgeted)
ubifs_release_budget(c, &req);
out_fname:
fscrypt_free_filename(&nm);
return err;
}
static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
struct inode *inode;
struct ubifs_inode *dir_ui = ubifs_inode(dir);
struct ubifs_info *c = dir->i_sb->s_fs_info;
int err, sz_change;
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
struct fscrypt_name nm;
/*
* Budget request settings: new inode, new direntry and changing parent
* directory inode.
*/
dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
dentry, mode, dir->i_ino);
err = ubifs_budget_space(c, &req);
if (err)
return err;
err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
if (err)
goto out_budg;
sz_change = CALC_DENT_SIZE(fname_len(&nm));
inode = ubifs_new_inode(c, dir, S_IFDIR | mode);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out_fname;
}
err = ubifs_init_security(dir, inode, &dentry->d_name);
if (err)
goto out_inode;
mutex_lock(&dir_ui->ui_mutex);
insert_inode_hash(inode);
inc_nlink(inode);
inc_nlink(dir);
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
if (err) {
ubifs_err(c, "cannot create directory, error %d", err);
goto out_cancel;
}
mutex_unlock(&dir_ui->ui_mutex);
ubifs_release_budget(c, &req);
d_instantiate(dentry, inode);
fscrypt_free_filename(&nm);
return 0;
out_cancel:
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
drop_nlink(dir);
mutex_unlock(&dir_ui->ui_mutex);
out_inode:
make_bad_inode(inode);
iput(inode);
out_fname:
fscrypt_free_filename(&nm);
out_budg:
ubifs_release_budget(c, &req);
return err;
}
static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
umode_t mode, dev_t rdev)
{
struct inode *inode;
struct ubifs_inode *ui;
struct ubifs_inode *dir_ui = ubifs_inode(dir);
struct ubifs_info *c = dir->i_sb->s_fs_info;
union ubifs_dev_desc *dev = NULL;
int sz_change;
int err, devlen = 0;
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
.dirtied_ino = 1 };
struct fscrypt_name nm;
/*
* Budget request settings: new inode, new direntry and changing parent
* directory inode.
*/
dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);
if (S_ISBLK(mode) || S_ISCHR(mode)) {
dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
if (!dev)
return -ENOMEM;
devlen = ubifs_encode_dev(dev, rdev);
}
req.new_ino_d = ALIGN(devlen, 8);
err = ubifs_budget_space(c, &req);
if (err) {
kfree(dev);
return err;
}
err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
if (err) {
kfree(dev);
goto out_budg;
}
sz_change = CALC_DENT_SIZE(fname_len(&nm));
inode = ubifs_new_inode(c, dir, mode);
if (IS_ERR(inode)) {
kfree(dev);
err = PTR_ERR(inode);
goto out_fname;
}
init_special_inode(inode, inode->i_mode, rdev);
inode->i_size = ubifs_inode(inode)->ui_size = devlen;
ui = ubifs_inode(inode);
ui->data = dev;
ui->data_len = devlen;
err = ubifs_init_security(dir, inode, &dentry->d_name);
if (err)
goto out_inode;
mutex_lock(&dir_ui->ui_mutex);
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
if (err)
goto out_cancel;
mutex_unlock(&dir_ui->ui_mutex);
ubifs_release_budget(c, &req);
insert_inode_hash(inode);
d_instantiate(dentry, inode);
fscrypt_free_filename(&nm);
return 0;
out_cancel:
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
mutex_unlock(&dir_ui->ui_mutex);
out_inode:
make_bad_inode(inode);
iput(inode);
out_fname:
fscrypt_free_filename(&nm);
out_budg:
ubifs_release_budget(c, &req);
return err;
}
static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
const char *symname)
{
struct inode *inode;
struct ubifs_inode *ui;
struct ubifs_inode *dir_ui = ubifs_inode(dir);
struct ubifs_info *c = dir->i_sb->s_fs_info;
int err, len = strlen(symname);
int sz_change = CALC_DENT_SIZE(len);
struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1);
struct fscrypt_symlink_data *sd = NULL;
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
.new_ino_d = ALIGN(len, 8),
.dirtied_ino = 1 };
struct fscrypt_name nm;
if (ubifs_crypt_is_encrypted(dir)) {
err = fscrypt_get_encryption_info(dir);
if (err)
goto out_budg;
if (!fscrypt_has_encryption_key(dir)) {
err = -EPERM;
goto out_budg;
}
disk_link.len = (fscrypt_fname_encrypted_size(dir, len) +
sizeof(struct fscrypt_symlink_data));
}
/*
* Budget request settings: new inode, new direntry and changing parent
* directory inode.
*/
dbg_gen("dent '%pd', target '%s' in dir ino %lu", dentry,
symname, dir->i_ino);
if (disk_link.len > UBIFS_MAX_INO_DATA)
return -ENAMETOOLONG;
err = ubifs_budget_space(c, &req);
if (err)
return err;
err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
if (err)
goto out_budg;
inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out_fname;
}
ui = ubifs_inode(inode);
ui->data = kmalloc(disk_link.len, GFP_NOFS);
if (!ui->data) {
err = -ENOMEM;
goto out_inode;
}
if (ubifs_crypt_is_encrypted(dir)) {
struct qstr istr = QSTR_INIT(symname, len);
struct fscrypt_str ostr;
sd = kzalloc(disk_link.len, GFP_NOFS);
if (!sd) {
err = -ENOMEM;
goto out_inode;
}
ostr.name = sd->encrypted_path;
ostr.len = disk_link.len;
err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr);
if (err) {
kfree(sd);
goto out_inode;
}
sd->len = cpu_to_le16(ostr.len);
disk_link.name = (char *)sd;
} else {
inode->i_link = ui->data;
}
memcpy(ui->data, disk_link.name, disk_link.len);
((char *)ui->data)[disk_link.len - 1] = '\0';
/*
* The terminating zero byte is not written to the flash media and it
* is put just to make later in-memory string processing simpler. Thus,
* data length is @len, not @len + %1.
*/
ui->data_len = disk_link.len - 1;
inode->i_size = ubifs_inode(inode)->ui_size = disk_link.len - 1;
err = ubifs_init_security(dir, inode, &dentry->d_name);
if (err)
goto out_inode;
mutex_lock(&dir_ui->ui_mutex);
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
dir->i_mtime = dir->i_ctime = inode->i_ctime;
err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
if (err)
goto out_cancel;
mutex_unlock(&dir_ui->ui_mutex);
ubifs_release_budget(c, &req);
insert_inode_hash(inode);
d_instantiate(dentry, inode);
fscrypt_free_filename(&nm);
return 0;
out_cancel:
dir->i_size -= sz_change;
dir_ui->ui_size = dir->i_size;
mutex_unlock(&dir_ui->ui_mutex);
out_inode:
make_bad_inode(inode);
iput(inode);
out_fname:
fscrypt_free_filename(&nm);
out_budg:
ubifs_release_budget(c, &req);
return err;
}
/**
* lock_4_inodes - a wrapper for locking three UBIFS inodes.
* @inode1: first inode
* @inode2: second inode
* @inode3: third inode
* @inode4: fouth inode
*
* This function is used for 'ubifs_rename()' and @inode1 may be the same as
* @inode2 whereas @inode3 and @inode4 may be %NULL.
*
* We do not implement any tricks to guarantee strict lock ordering, because
* VFS has already done it for us on the @i_mutex. So this is just a simple
* wrapper function.
*/
static void lock_4_inodes(struct inode *inode1, struct inode *inode2,
struct inode *inode3, struct inode *inode4)
{
mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
if (inode2 != inode1)
mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
if (inode3)
mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
if (inode4)
mutex_lock_nested(&ubifs_inode(inode4)->ui_mutex, WB_MUTEX_4);
}
/**
* unlock_4_inodes - a wrapper for unlocking three UBIFS inodes for rename.
* @inode1: first inode
* @inode2: second inode
* @inode3: third inode
* @inode4: fouth inode
*/
static void unlock_4_inodes(struct inode *inode1, struct inode *inode2,
struct inode *inode3, struct inode *inode4)
{
if (inode4)
mutex_unlock(&ubifs_inode(inode4)->ui_mutex);
if (inode3)
mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
if (inode1 != inode2)
mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
}
static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags)
{
struct ubifs_info *c = old_dir->i_sb->s_fs_info;
struct inode *old_inode = d_inode(old_dentry);
struct inode *new_inode = d_inode(new_dentry);
struct inode *whiteout = NULL;
struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
struct ubifs_inode *whiteout_ui = NULL;
int err, release, sync = 0, move = (new_dir != old_dir);
int is_dir = S_ISDIR(old_inode->i_mode);
int unlink = !!new_inode, new_sz, old_sz;
struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
.dirtied_ino = 3 };
struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
.dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
struct timespec time;
unsigned int uninitialized_var(saved_nlink);
struct fscrypt_name old_nm, new_nm;
/*
* Budget request settings: deletion direntry, new direntry, removing
* the old inode, and changing old and new parent directory inodes.
*
* However, this operation also marks the target inode as dirty and
* does not write it, so we allocate budget for the target inode
* separately.
*/
dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu flags 0x%x",
old_dentry, old_inode->i_ino, old_dir->i_ino,
new_dentry, new_dir->i_ino, flags);
if (unlink)
ubifs_assert(inode_is_locked(new_inode));
if (old_dir != new_dir) {
if (ubifs_crypt_is_encrypted(new_dir) &&
!fscrypt_has_permitted_context(new_dir, old_inode))
return -EPERM;
}
if (unlink && is_dir) {
err = ubifs_check_dir_empty(new_inode);
if (err)
return err;
}
err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &old_nm);
if (err)
return err;
err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &new_nm);
if (err) {
fscrypt_free_filename(&old_nm);
return err;
}
new_sz = CALC_DENT_SIZE(fname_len(&new_nm));
old_sz = CALC_DENT_SIZE(fname_len(&old_nm));
err = ubifs_budget_space(c, &req);
if (err) {
fscrypt_free_filename(&old_nm);
fscrypt_free_filename(&new_nm);
return err;
}
err = ubifs_budget_space(c, &ino_req);
if (err) {
fscrypt_free_filename(&old_nm);
fscrypt_free_filename(&new_nm);
ubifs_release_budget(c, &req);
return err;
}
if (flags & RENAME_WHITEOUT) {
union ubifs_dev_desc *dev = NULL;
dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
if (!dev) {
err = -ENOMEM;
goto out_release;
}
err = do_tmpfile(old_dir, old_dentry, S_IFCHR | WHITEOUT_MODE, &whiteout);
if (err) {
kfree(dev);
goto out_release;
}
whiteout->i_state |= I_LINKABLE;
whiteout_ui = ubifs_inode(whiteout);
whiteout_ui->data = dev;
whiteout_ui->data_len = ubifs_encode_dev(dev, MKDEV(0, 0));
ubifs_assert(!whiteout_ui->dirty);
}
lock_4_inodes(old_dir, new_dir, new_inode, whiteout);
/*
* Like most other Unix systems, set the @i_ctime for inodes on a
* rename.
*/
time = current_time(old_dir);
old_inode->i_ctime = time;
/* We must adjust parent link count when renaming directories */
if (is_dir) {
if (move) {
/*
* @old_dir loses a link because we are moving
* @old_inode to a different directory.
*/
drop_nlink(old_dir);
/*
* @new_dir only gains a link if we are not also
* overwriting an existing directory.
*/
if (!unlink)
inc_nlink(new_dir);
} else {
/*
* @old_inode is not moving to a different directory,
* but @old_dir still loses a link if we are
* overwriting an existing directory.
*/
if (unlink)
drop_nlink(old_dir);
}
}
old_dir->i_size -= old_sz;
ubifs_inode(old_dir)->ui_size = old_dir->i_size;
old_dir->i_mtime = old_dir->i_ctime = time;
new_dir->i_mtime = new_dir->i_ctime = time;
/*
* And finally, if we unlinked a direntry which happened to have the
* same name as the moved direntry, we have to decrement @i_nlink of
* the unlinked inode and change its ctime.
*/
if (unlink) {
/*
* Directories cannot have hard-links, so if this is a
* directory, just clear @i_nlink.
*/
saved_nlink = new_inode->i_nlink;
if (is_dir)
clear_nlink(new_inode);
else
drop_nlink(new_inode);
new_inode->i_ctime = time;
} else {
new_dir->i_size += new_sz;
ubifs_inode(new_dir)->ui_size = new_dir->i_size;
}
/*
* Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
* is dirty, because this will be done later on at the end of
* 'ubifs_rename()'.
*/
if (IS_SYNC(old_inode)) {
sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
if (unlink && IS_SYNC(new_inode))
sync = 1;
}
if (whiteout) {
struct ubifs_budget_req wht_req = { .dirtied_ino = 1,
.dirtied_ino_d = \
ALIGN(ubifs_inode(whiteout)->data_len, 8) };
err = ubifs_budget_space(c, &wht_req);
if (err) {
kfree(whiteout_ui->data);
whiteout_ui->data_len = 0;
iput(whiteout);
goto out_release;
}
inc_nlink(whiteout);
mark_inode_dirty(whiteout);
whiteout->i_state &= ~I_LINKABLE;
iput(whiteout);
}
err = ubifs_jnl_rename(c, old_dir, old_inode, &old_nm, new_dir,
new_inode, &new_nm, whiteout, sync);
if (err)
goto out_cancel;
unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
ubifs_release_budget(c, &req);
mutex_lock(&old_inode_ui->ui_mutex);
release = old_inode_ui->dirty;
mark_inode_dirty_sync(old_inode);
mutex_unlock(&old_inode_ui->ui_mutex);
if (release)
ubifs_release_budget(c, &ino_req);
if (IS_SYNC(old_inode))
err = old_inode->i_sb->s_op->write_inode(old_inode, NULL);
fscrypt_free_filename(&old_nm);
fscrypt_free_filename(&new_nm);
return err;
out_cancel:
if (unlink) {
set_nlink(new_inode, saved_nlink);
} else {
new_dir->i_size -= new_sz;
ubifs_inode(new_dir)->ui_size = new_dir->i_size;
}
old_dir->i_size += old_sz;
ubifs_inode(old_dir)->ui_size = old_dir->i_size;
if (is_dir) {
if (move) {
inc_nlink(old_dir);
if (!unlink)
drop_nlink(new_dir);
} else {
if (unlink)
inc_nlink(old_dir);
}
}
if (whiteout) {
drop_nlink(whiteout);
iput(whiteout);
}
unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
out_release:
ubifs_release_budget(c, &ino_req);
ubifs_release_budget(c, &req);
fscrypt_free_filename(&old_nm);
fscrypt_free_filename(&new_nm);
return err;
}
static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct ubifs_info *c = old_dir->i_sb->s_fs_info;
struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
.dirtied_ino = 2 };
int sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
struct inode *fst_inode = d_inode(old_dentry);
struct inode *snd_inode = d_inode(new_dentry);
struct timespec time;
int err;
struct fscrypt_name fst_nm, snd_nm;
ubifs_assert(fst_inode && snd_inode);
if ((ubifs_crypt_is_encrypted(old_dir) ||
ubifs_crypt_is_encrypted(new_dir)) &&
(old_dir != new_dir) &&
(!fscrypt_has_permitted_context(new_dir, fst_inode) ||
!fscrypt_has_permitted_context(old_dir, snd_inode)))
return -EPERM;
err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &fst_nm);
if (err)
return err;
err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &snd_nm);
if (err) {
fscrypt_free_filename(&fst_nm);
return err;
}
lock_4_inodes(old_dir, new_dir, NULL, NULL);
time = current_time(old_dir);
fst_inode->i_ctime = time;
snd_inode->i_ctime = time;
old_dir->i_mtime = old_dir->i_ctime = time;
new_dir->i_mtime = new_dir->i_ctime = time;
if (old_dir != new_dir) {
if (S_ISDIR(fst_inode->i_mode) && !S_ISDIR(snd_inode->i_mode)) {
inc_nlink(new_dir);
drop_nlink(old_dir);
}
else if (!S_ISDIR(fst_inode->i_mode) && S_ISDIR(snd_inode->i_mode)) {
drop_nlink(new_dir);
inc_nlink(old_dir);
}
}
err = ubifs_jnl_xrename(c, old_dir, fst_inode, &fst_nm, new_dir,
snd_inode, &snd_nm, sync);
unlock_4_inodes(old_dir, new_dir, NULL, NULL);
ubifs_release_budget(c, &req);
fscrypt_free_filename(&fst_nm);
fscrypt_free_filename(&snd_nm);
return err;
}
static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags)
{
if (flags & ~(RENAME_NOREPLACE | RENAME_WHITEOUT | RENAME_EXCHANGE))
return -EINVAL;
ubifs_assert(inode_is_locked(old_dir));
ubifs_assert(inode_is_locked(new_dir));
if (flags & RENAME_EXCHANGE)
return ubifs_xrename(old_dir, old_dentry, new_dir, new_dentry);
return do_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
}
int ubifs_getattr(const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int flags)
{
loff_t size;
struct inode *inode = d_inode(path->dentry);
struct ubifs_inode *ui = ubifs_inode(inode);
mutex_lock(&ui->ui_mutex);
if (ui->flags & UBIFS_APPEND_FL)
stat->attributes |= STATX_ATTR_APPEND;
if (ui->flags & UBIFS_COMPR_FL)
stat->attributes |= STATX_ATTR_COMPRESSED;
if (ui->flags & UBIFS_CRYPT_FL)
stat->attributes |= STATX_ATTR_ENCRYPTED;
if (ui->flags & UBIFS_IMMUTABLE_FL)
stat->attributes |= STATX_ATTR_IMMUTABLE;
stat->attributes_mask |= (STATX_ATTR_APPEND |
STATX_ATTR_COMPRESSED |
STATX_ATTR_ENCRYPTED |
STATX_ATTR_IMMUTABLE);
generic_fillattr(inode, stat);
stat->blksize = UBIFS_BLOCK_SIZE;
stat->size = ui->ui_size;
/*
* Unfortunately, the 'stat()' system call was designed for block
* device based file systems, and it is not appropriate for UBIFS,
* because UBIFS does not have notion of "block". For example, it is
* difficult to tell how many block a directory takes - it actually
* takes less than 300 bytes, but we have to round it to block size,
* which introduces large mistake. This makes utilities like 'du' to
* report completely senseless numbers. This is the reason why UBIFS
* goes the same way as JFFS2 - it reports zero blocks for everything
* but regular files, which makes more sense than reporting completely
* wrong sizes.
*/
if (S_ISREG(inode->i_mode)) {
size = ui->xattr_size;
size += stat->size;
size = ALIGN(size, UBIFS_BLOCK_SIZE);
/*
* Note, user-space expects 512-byte blocks count irrespectively
* of what was reported in @stat->size.
*/
stat->blocks = size >> 9;
} else
stat->blocks = 0;
mutex_unlock(&ui->ui_mutex);
return 0;
}
static int ubifs_dir_open(struct inode *dir, struct file *file)
{
if (ubifs_crypt_is_encrypted(dir))
return fscrypt_get_encryption_info(dir) ? -EACCES : 0;
return 0;
}
const struct inode_operations ubifs_dir_inode_operations = {
.lookup = ubifs_lookup,
.create = ubifs_create,
.link = ubifs_link,
.symlink = ubifs_symlink,
.unlink = ubifs_unlink,
.mkdir = ubifs_mkdir,
.rmdir = ubifs_rmdir,
.mknod = ubifs_mknod,
.rename = ubifs_rename,
.setattr = ubifs_setattr,
.getattr = ubifs_getattr,
.listxattr = ubifs_listxattr,
#ifdef CONFIG_UBIFS_ATIME_SUPPORT
.update_time = ubifs_update_time,
#endif
.tmpfile = ubifs_tmpfile,
};
const struct file_operations ubifs_dir_operations = {
.llseek = generic_file_llseek,
.release = ubifs_dir_release,
.read = generic_read_dir,
.iterate_shared = ubifs_readdir,
.fsync = ubifs_fsync,
.unlocked_ioctl = ubifs_ioctl,
.open = ubifs_dir_open,
#ifdef CONFIG_COMPAT
.compat_ioctl = ubifs_compat_ioctl,
#endif
};
