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always call inode_change_ok early in ->setattr 

Make sure we call inode_change_ok before doing any changes in ->setattr,
and make sure to call it even if our fs wants to ignore normal UNIX
permissions, but use the ATTR_FORCE to skip those.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2010-06-04 11:30:03 +02:00 committed by Al Viro
parent 1025774ce4
commit db78b877f7
6 changed files with 48 additions and 48 deletions
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29
fs/cifs/inode.c
View File

@ -1796,14 +1796,12 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
xid = GetXid();
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
/* check if we have permission to change attrs */
rc = inode_change_ok(inode, attrs);
if (rc < 0)
goto out;
else
rc = 0;
}
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
attrs->ia_valid |= ATTR_FORCE;
rc = inode_change_ok(inode, attrs);
if (rc < 0)
goto out;
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
@ -1934,14 +1932,13 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
cFYI(1, "setattr on file %s attrs->iavalid 0x%x",
direntry->d_name.name, attrs->ia_valid);
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
/* check if we have permission to change attrs */
rc = inode_change_ok(inode, attrs);
if (rc < 0) {
FreeXid(xid);
return rc;
} else
rc = 0;
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
attrs->ia_valid |= ATTR_FORCE;
rc = inode_change_ok(inode, attrs);
if (rc < 0) {
FreeXid(xid);
return rc;
}
full_path = build_path_from_dentry(direntry);

30
fs/fat/file.c
View File

@ -387,21 +387,6 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr)
unsigned int ia_valid;
int error;
/*
* Expand the file. Since inode_setattr() updates ->i_size
* before calling the ->truncate(), but FAT needs to fill the
* hole before it. XXX: this is no longer true with new truncate
* sequence.
*/
if (attr->ia_valid & ATTR_SIZE) {
if (attr->ia_size > inode->i_size) {
error = fat_cont_expand(inode, attr->ia_size);
if (error || attr->ia_valid == ATTR_SIZE)
goto out;
attr->ia_valid &= ~ATTR_SIZE;
}
}
/* Check for setting the inode time. */
ia_valid = attr->ia_valid;
if (ia_valid & TIMES_SET_FLAGS) {
@ -417,6 +402,21 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr)
goto out;
}
/*
* Expand the file. Since inode_setattr() updates ->i_size
* before calling the ->truncate(), but FAT needs to fill the
* hole before it. XXX: this is no longer true with new truncate
* sequence.
*/
if (attr->ia_valid & ATTR_SIZE) {
if (attr->ia_size > inode->i_size) {
error = fat_cont_expand(inode, attr->ia_size);
if (error || attr->ia_valid == ATTR_SIZE)
goto out;
attr->ia_valid &= ~ATTR_SIZE;
}
}
if (((attr->ia_valid & ATTR_UID) &&
(attr->ia_uid != sbi->options.fs_uid)) ||
((attr->ia_valid & ATTR_GID) &&

11
fs/fuse/dir.c
View File

@ -1270,11 +1270,12 @@ static int fuse_do_setattr(struct dentry *entry, struct iattr *attr,
if (!fuse_allow_task(fc, current))
return -EACCES;
if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
err = inode_change_ok(inode, attr);
if (err)
return err;
}
if (!(fc->flags & FUSE_DEFAULT_PERMISSIONS))
attr->ia_valid |= ATTR_FORCE;
err = inode_change_ok(inode, attr);
if (err)
return err;
if ((attr->ia_valid & ATTR_OPEN) && fc->atomic_o_trunc)
return 0;

8
fs/logfs/file.c
View File

@ -232,16 +232,16 @@ static int logfs_setattr(struct dentry *dentry, struct iattr *attr)
struct inode *inode = dentry->d_inode;
int err = 0;
err = inode_change_ok(inode, attr);
if (err)
return err;
if (attr->ia_valid & ATTR_SIZE) {
err = logfs_truncate(inode, attr->ia_size);
if (err)
return err;
}
err = inode_change_ok(inode, attr);
if (err)
return err;
setattr_copy(inode, attr);
mark_inode_dirty(inode);
return 0;

8
fs/reiserfs/inode.c
View File

@ -3084,6 +3084,10 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
int depth;
int error;
error = inode_change_ok(inode, attr);
if (error)
return error;
/* must be turned off for recursive notify_change calls */
ia_valid = attr->ia_valid &= ~(ATTR_KILL_SUID|ATTR_KILL_SGID);
@ -3133,10 +3137,6 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
goto out;
}
error = inode_change_ok(inode, attr);
if (error)
goto out;
if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
(ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
struct reiserfs_transaction_handle th;

10
mm/shmem.c
View File

@ -767,6 +767,10 @@ static int shmem_notify_change(struct dentry *dentry, struct iattr *attr)
loff_t newsize = attr->ia_size;
int error;
error = inode_change_ok(inode, attr);
if (error)
return error;
if (S_ISREG(inode->i_mode) && (attr->ia_valid & ATTR_SIZE)
&& newsize != inode->i_size) {
struct page *page = NULL;
@ -809,11 +813,9 @@ static int shmem_notify_change(struct dentry *dentry, struct iattr *attr)
shmem_truncate_range(inode, newsize, (loff_t)-1);
}
error = inode_change_ok(inode, attr);
if (!error)
setattr_copy(inode, attr);
setattr_copy(inode, attr);
#ifdef CONFIG_TMPFS_POSIX_ACL
if (!error && (attr->ia_valid & ATTR_MODE))
if (attr->ia_valid & ATTR_MODE)
error = generic_acl_chmod(inode);
#endif
return error;