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[JFFS2] Tidy up fix for ACL/permissions problem.

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[In commit 9ed437c50d we fixed a problem 
with standard permissions on newly-created inodes, when POSIX ACLs are 
enabled. This cleans it up...]

The attached patch separate jffs2_init_acl() into two parts.

The one is jffs2_init_acl_pre() called from jffs2_new_inode().
It compute ACL oriented inode->i_mode bits, and allocate in-memory ACL
objects associated with the new inode just before when inode meta
infomation is written to the medium.

The other is jffs2_init_acl_post() called from jffs2_symlink(),
jffs2_mkdir(), jffs2_mknod() and jffs2_do_create().
It actually writes in-memory ACL objects into the medium next to
the success of writing meta-information.

In the current implementation, we have to write a same inode meta
infomation twice when inode->i_mode is updated by the default ACL.
However, we can avoid the behavior by putting an updated i_mode
before it is written at first, as jffs2_init_acl_pre() doing.

Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
KaiGai Kohei
2007-09-14 15:16:35 +09:00
committed by David Woodhouse
parent e8b8c97773
commit cfc8dc6f6f
6 changed files with 94 additions and 87 deletions
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35
fs/jffs2/dir.c
View File

@@ -182,7 +182,6 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
struct jffs2_inode_info *f, *dir_f;
struct jffs2_sb_info *c;
struct inode *inode;
struct posix_acl *acl;
int ret;
ri = jffs2_alloc_raw_inode();
@@ -193,7 +192,7 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
D1(printk(KERN_DEBUG "jffs2_create()\n"));
inode = jffs2_new_inode(dir_i, mode, ri, &acl);
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
@@ -211,14 +210,6 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
ret = jffs2_do_create(c, dir_f, f, ri,
dentry->d_name.name, dentry->d_name.len);
if (ret)
goto fail_acl;
ret = jffs2_init_security(inode, dir_i);
if (ret)
goto fail_acl;
ret = jffs2_init_acl(inode, acl);
if (ret)
goto fail;
@@ -231,8 +222,6 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
return 0;
fail_acl:
posix_acl_release(acl);
fail:
make_bad_inode(inode);
iput(inode);
@@ -309,7 +298,6 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen;
struct posix_acl *acl;
int ret, targetlen = strlen(target);
/* FIXME: If you care. We'd need to use frags for the target
@@ -336,7 +324,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
return ret;
}
inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri, &acl);
inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
@@ -366,7 +354,6 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
posix_acl_release(acl);
return PTR_ERR(fn);
}
@@ -377,7 +364,6 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
posix_acl_release(acl);
return -ENOMEM;
}
@@ -395,10 +381,9 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
ret = jffs2_init_security(inode, dir_i);
if (ret) {
jffs2_clear_inode(inode);
posix_acl_release(acl);
return ret;
}
ret = jffs2_init_acl(inode, acl);
ret = jffs2_init_acl_post(inode);
if (ret) {
jffs2_clear_inode(inode);
return ret;
@@ -476,7 +461,6 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen;
struct posix_acl *acl;
int ret;
mode |= S_IFDIR;
@@ -499,7 +483,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri, &acl);
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
@@ -526,7 +510,6 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
posix_acl_release(acl);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
@@ -540,10 +523,9 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
ret = jffs2_init_security(inode, dir_i);
if (ret) {
jffs2_clear_inode(inode);
posix_acl_release(acl);
return ret;
}
ret = jffs2_init_acl(inode, acl);
ret = jffs2_init_acl_post(inode);
if (ret) {
jffs2_clear_inode(inode);
return ret;
@@ -639,7 +621,6 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
union jffs2_device_node dev;
int devlen = 0;
uint32_t alloclen;
struct posix_acl *acl;
int ret;
if (!new_valid_dev(rdev))
@@ -666,7 +647,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
return ret;
}
inode = jffs2_new_inode(dir_i, mode, ri, &acl);
inode = jffs2_new_inode(dir_i, mode, ri);
if (IS_ERR(inode)) {
jffs2_free_raw_inode(ri);
@@ -695,7 +676,6 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
up(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
posix_acl_release(acl);
return PTR_ERR(fn);
}
/* No data here. Only a metadata node, which will be
@@ -709,10 +689,9 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
ret = jffs2_init_security(inode, dir_i);
if (ret) {
jffs2_clear_inode(inode);
posix_acl_release(acl);
return ret;
}
ret = jffs2_init_acl(inode, acl);
ret = jffs2_init_acl_post(inode);
if (ret) {
jffs2_clear_inode(inode);
return ret;