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ovl: move impure to ovl_inode

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Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2017-07-04 22:03:16 +02:00
parent cf31c46347
commit 13c72075ac
6 changed files with 26 additions and 17 deletions
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4
fs/overlayfs/inode.c
View File

@ -490,6 +490,10 @@ struct inode *ovl_get_inode(struct dentry *dentry, struct dentry *upperdentry)
}
ovl_fill_inode(inode, realinode->i_mode, realinode->i_rdev);
ovl_inode_init(inode, upperdentry, lowerdentry);
if (upperdentry && ovl_is_impuredir(upperdentry))
ovl_set_flag(OVL_IMPURE, inode);
if (inode->i_state & I_NEW)
unlock_new_inode(inode);
out:

4
fs/overlayfs/namei.c
View File

@ -341,7 +341,6 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
unsigned int ctr = 0;
struct inode *inode = NULL;
bool upperopaque = false;
bool upperimpure = false;
char *upperredirect = NULL;
struct dentry *this;
unsigned int i;
@ -386,8 +385,6 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
poe = roe;
}
upperopaque = d.opaque;
if (upperdentry && d.is_dir)
upperimpure = ovl_is_impuredir(upperdentry);
}
if (!d.stop && poe->numlower) {
@ -434,7 +431,6 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
goto out_put;
oe->opaque = upperopaque;
oe->impure = upperimpure;
memcpy(oe->lowerstack, stack, sizeof(struct path) * ctr);
dentry->d_fsdata = oe;

7
fs/overlayfs/overlayfs.h
View File

@ -26,6 +26,10 @@ enum ovl_path_type {
#define OVL_XATTR_ORIGIN OVL_XATTR_PREFIX "origin"
#define OVL_XATTR_IMPURE OVL_XATTR_PREFIX "impure"
enum ovl_flag {
OVL_IMPURE,
};
/*
* The tuple (fh,uuid) is a universal unique identifier for a copy up origin,
* where:
@ -195,7 +199,6 @@ struct inode *ovl_inode_real(struct inode *inode);
struct ovl_dir_cache *ovl_dir_cache(struct dentry *dentry);
void ovl_set_dir_cache(struct dentry *dentry, struct ovl_dir_cache *cache);
bool ovl_dentry_is_opaque(struct dentry *dentry);
bool ovl_dentry_is_impure(struct dentry *dentry);
bool ovl_dentry_is_whiteout(struct dentry *dentry);
void ovl_dentry_set_opaque(struct dentry *dentry);
bool ovl_redirect_dir(struct super_block *sb);
@ -215,6 +218,8 @@ int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,
const char *name, const void *value, size_t size,
int xerr);
int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry);
void ovl_set_flag(unsigned long flag, struct inode *inode);
bool ovl_test_flag(unsigned long flag, struct inode *inode);
static inline bool ovl_is_impuredir(struct dentry *dentry)
{

2
fs/overlayfs/ovl_entry.h
View File

@ -41,7 +41,6 @@ struct ovl_entry {
struct {
u64 version;
bool opaque;
bool impure;
bool copying;
};
struct rcu_head rcu;
@ -54,6 +53,7 @@ struct ovl_entry *ovl_alloc_entry(unsigned int numlower);
struct ovl_inode {
const char *redirect;
unsigned long flags;
struct inode vfs_inode;
struct dentry *__upperdentry;
struct inode *lower;

4
fs/overlayfs/super.c
View File

@ -170,6 +170,7 @@ static struct inode *ovl_alloc_inode(struct super_block *sb)
struct ovl_inode *oi = kmem_cache_alloc(ovl_inode_cachep, GFP_KERNEL);
oi->redirect = NULL;
oi->flags = 0;
oi->__upperdentry = NULL;
oi->lower = NULL;
@ -1004,7 +1005,8 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
kfree(lowertmp);
if (upperpath.dentry) {
oe->impure = ovl_is_impuredir(upperpath.dentry);
if (ovl_is_impuredir(upperpath.dentry))
ovl_set_flag(OVL_IMPURE, d_inode(root_dentry));
}
for (i = 0; i < numlower; i++) {
oe->lowerstack[i].dentry = stack[i].dentry;

22
fs/overlayfs/util.c
View File

@ -178,13 +178,6 @@ bool ovl_dentry_is_opaque(struct dentry *dentry)
return oe->opaque;
}
bool ovl_dentry_is_impure(struct dentry *dentry)
{
struct ovl_entry *oe = dentry->d_fsdata;
return oe->impure;
}
bool ovl_dentry_is_whiteout(struct dentry *dentry)
{
return !dentry->d_inode && ovl_dentry_is_opaque(dentry);
@ -344,9 +337,8 @@ int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,
int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry)
{
int err;
struct ovl_entry *oe = dentry->d_fsdata;
if (oe->impure)
if (ovl_test_flag(OVL_IMPURE, d_inode(dentry)))
return 0;
/*
@ -356,7 +348,17 @@ int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry)
err = ovl_check_setxattr(dentry, upperdentry, OVL_XATTR_IMPURE,
"y", 1, 0);
if (!err)
oe->impure = true;
ovl_set_flag(OVL_IMPURE, d_inode(dentry));
return err;
}
void ovl_set_flag(unsigned long flag, struct inode *inode)
{
set_bit(flag, &OVL_I(inode)->flags);
}
bool ovl_test_flag(unsigned long flag, struct inode *inode)
{
return test_bit(flag, &OVL_I(inode)->flags);
}