lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sanitize xattr handler prototypes

Browse Source 
Add a flags argument to struct xattr_handler and pass it to all xattr
handler methods.  This allows using the same methods for multiple
handlers, e.g. for the ACL methods which perform exactly the same action
for the access and default ACLs, just using a different underlying
attribute.  With a little more groundwork it'll also allow sharing the
methods for the regular user/trusted/secure handlers in extN, ocfs2 and
jffs2 like it's already done for xfs in this patch.

Also change the inode argument to the handlers to a dentry to allow
using the handlers mechnism for filesystems that require it later,
e.g. cifs.

[with GFS2 bits updated by Steven Whitehouse <swhiteho@redhat.com>]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig
2009-11-13 09:52:56 +00:00
committed by Al Viro
parent ef26ca97e8
commit 431547b3c4
39 changed files with 533 additions and 815 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
fs/reiserfs/xattr.c
View File

@@ -48,6 +48,7 @@
#include <net/checksum.h>
#include <linux/stat.h>
#include <linux/quotaops.h>
#include <linux/security.h>
#define PRIVROOT_NAME ".reiserfs_priv"
#define XAROOT_NAME "xattrs"
@@ -726,15 +727,14 @@ ssize_t
reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
size_t size)
{
struct inode *inode = dentry->d_inode;
struct xattr_handler *handler;
handler = find_xattr_handler_prefix(inode->i_sb->s_xattr, name);
handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
if (!handler || get_inode_sd_version(inode) == STAT_DATA_V1)
if (!handler || get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
return handler->get(inode, name, buffer, size);
return handler->get(dentry, name, buffer, size, handler->flags);
}
/*
@@ -746,15 +746,14 @@ int
reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags)
{
struct inode *inode = dentry->d_inode;
struct xattr_handler *handler;
handler = find_xattr_handler_prefix(inode->i_sb->s_xattr, name);
handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
if (!handler || get_inode_sd_version(inode) == STAT_DATA_V1)
if (!handler || get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
return handler->set(inode, name, value, size, flags);
return handler->set(dentry, name, value, size, flags, handler->flags);
}
/*
@@ -764,21 +763,20 @@ reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
*/
int reiserfs_removexattr(struct dentry *dentry, const char *name)
{
struct inode *inode = dentry->d_inode;
struct xattr_handler *handler;
handler = find_xattr_handler_prefix(inode->i_sb->s_xattr, name);
handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
if (!handler || get_inode_sd_version(inode) == STAT_DATA_V1)
if (!handler || get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
return handler->set(inode, name, NULL, 0, XATTR_REPLACE);
return handler->set(dentry, name, NULL, 0, XATTR_REPLACE, handler->flags);
}
struct listxattr_buf {
size_t size;
size_t pos;
char *buf;
struct inode *inode;
struct dentry *dentry;
};
static int listxattr_filler(void *buf, const char *name, int namelen,
@@ -789,17 +787,19 @@ static int listxattr_filler(void *buf, const char *name, int namelen,
if (name[0] != '.' ||
(namelen != 1 && (name[1] != '.' || namelen != 2))) {
struct xattr_handler *handler;
handler = find_xattr_handler_prefix(b->inode->i_sb->s_xattr,
handler = find_xattr_handler_prefix(b->dentry->d_sb->s_xattr,
name);
if (!handler) /* Unsupported xattr name */
return 0;
if (b->buf) {
size = handler->list(b->inode, b->buf + b->pos,
b->size, name, namelen);
size = handler->list(b->dentry, b->buf + b->pos,
b->size, name, namelen,
handler->flags);
if (size > b->size)
return -ERANGE;
} else {
size = handler->list(b->inode, NULL, 0, name, namelen);
size = handler->list(b->dentry, NULL, 0, name,
namelen, handler->flags);
}
b->pos += size;
@@ -820,7 +820,7 @@ ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
int err = 0;
loff_t pos = 0;
struct listxattr_buf buf = {
.inode = dentry->d_inode,
.dentry = dentry,
.buf = buffer,
.size = buffer ? size : 0,
};