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iget: stop EFS from using iget() and read_inode()

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Stop the EFS filesystem from using iget() and read_inode().  Replace
efs_read_inode() with efs_iget(), and call that instead of iget().  efs_iget()
then uses iget_locked() directly and returns a proper error code instead of an
inode in the event of an error.

efs_fill_super() returns any error incurred when getting the root inode
instead of EACCES.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2008-02-07 00:15:34 -08:00 committed by Linus Torvalds
parent ce634ab28e
commit 298384cd79
4 changed files with 42 additions and 26 deletions
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25
fs/efs/inode.c
View file

@ -45,17 +45,26 @@ static inline void extent_copy(efs_extent *src, efs_extent *dst) {
return;
}
void efs_read_inode(struct inode *inode)
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(inode->i_sb);
struct efs_inode_info *in = INODE_INFO(inode);
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:
**
@ -159,13 +168,13 @@ void efs_read_inode(struct inode *inode)
break;
}
return;
unlock_new_inode(inode);
return inode;
read_inode_error:
printk(KERN_WARNING "EFS: failed to read inode %lu\n", inode->i_ino);
make_bad_inode(inode);
return;
iget_failed(inode);
return ERR_PTR(-EIO);
}
static inline efs_block_t

23
fs/efs/namei.c
View file

@ -66,9 +66,10 @@ struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, struct namei
lock_kernel();
inodenum = efs_find_entry(dir, dentry->d_name.name, dentry->d_name.len);
if (inodenum) {
if (!(inode = iget(dir->i_sb, inodenum))) {
inode = efs_iget(dir->i_sb, inodenum);
if (IS_ERR(inode)) {
unlock_kernel();
return ERR_PTR(-EACCES);
return ERR_CAST(inode);
}
}
unlock_kernel();
@ -84,12 +85,11 @@ static struct inode *efs_nfs_get_inode(struct super_block *sb, u64 ino,
if (ino == 0)
return ERR_PTR(-ESTALE);
inode = iget(sb, ino);
if (inode == NULL)
return ERR_PTR(-ENOMEM);
inode = efs_iget(sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
if (is_bad_inode(inode) ||
(generation && inode->i_generation != generation)) {
if (generation && inode->i_generation != generation) {
iput(inode);
return ERR_PTR(-ESTALE);
}
@ -116,7 +116,7 @@ struct dentry *efs_get_parent(struct dentry *child)
struct dentry *parent;
struct inode *inode;
efs_ino_t ino;
int error;
long error;
lock_kernel();
@ -125,10 +125,11 @@ struct dentry *efs_get_parent(struct dentry *child)
if (!ino)
goto fail;
error = -EACCES;
inode = iget(child->d_inode->i_sb, ino);
if (!inode)
inode = efs_iget(child->d_inode->i_sb, ino);
if (IS_ERR(inode)) {
error = PTR_ERR(inode);
goto fail;
}
error = -ENOMEM;
parent = d_alloc_anon(inode);

18
fs/efs/super.c
View file

@ -107,7 +107,6 @@ static int efs_remount(struct super_block *sb, int *flags, char *data)
static const struct super_operations efs_superblock_operations = {
.alloc_inode = efs_alloc_inode,
.destroy_inode = efs_destroy_inode,
.read_inode = efs_read_inode,
.put_super = efs_put_super,
.statfs = efs_statfs,
.remount_fs = efs_remount,
@ -247,6 +246,7 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
struct efs_sb_info *sb;
struct buffer_head *bh;
struct inode *root;
int ret = -EINVAL;
sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
if (!sb)
@ -303,12 +303,18 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
}
s->s_op = &efs_superblock_operations;
s->s_export_op = &efs_export_ops;
root = iget(s, EFS_ROOTINODE);
s->s_root = d_alloc_root(root);
if (!(s->s_root)) {
root = efs_iget(s, EFS_ROOTINODE);
if (IS_ERR(root)) {
printk(KERN_ERR "EFS: get root inode failed\n");
ret = PTR_ERR(root);
goto out_no_fs;
}
s->s_root = d_alloc_root(root);
if (!(s->s_root)) {
printk(KERN_ERR "EFS: get root dentry failed\n");
iput(root);
ret = -ENOMEM;
goto out_no_fs;
}
@ -318,7 +324,7 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
out_no_fs:
s->s_fs_info = NULL;
kfree(sb);
return -EINVAL;
return ret;
}
static int efs_statfs(struct dentry *dentry, struct kstatfs *buf) {

2
include/linux/efs_fs.h
View file

@ -41,7 +41,7 @@ extern const struct inode_operations efs_dir_inode_operations;
extern const struct file_operations efs_dir_operations;
extern const struct address_space_operations efs_symlink_aops;
extern void efs_read_inode(struct inode *);
extern struct inode *efs_iget(struct super_block *, unsigned long);
extern efs_block_t efs_map_block(struct inode *, efs_block_t);
extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);