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reiserfs: switch to generic_{get,set,remove}xattr()

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reiserfs_xattr_[sg]et() will fail with -EOPNOTSUPP for V1 inodes anyway,
and all reiserfs instances of ->[sg]et() call it and so does ->set_acl().

Checks for name length in the instances had been bogus; they should've
been "bugger off if it's _exactly_ the prefix" (as generic would
do on its own) and not "bugger off if it's shorter than the prefix" -
that can't happen.

xattr_full_name() is needed to adjust for the fact that generic instances
will skip the prefix in the name passed to ->[gs]et(); reiserfs homegrown
analogues didn't.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-04-10 18:50:48 -04:00
parent 5fdccfef48
commit 79a628d14e
7 changed files with 31 additions and 98 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
fs/reiserfs/file.c
View File

@ -260,10 +260,10 @@ const struct file_operations reiserfs_file_operations = {
const struct inode_operations reiserfs_file_inode_operations = {
.setattr = reiserfs_setattr,
.setxattr = reiserfs_setxattr,
.getxattr = reiserfs_getxattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = reiserfs_listxattr,
.removexattr = reiserfs_removexattr,
.removexattr = generic_removexattr,
.permission = reiserfs_permission,
.get_acl = reiserfs_get_acl,
.set_acl = reiserfs_set_acl,

18
fs/reiserfs/namei.c
View File

@ -1650,10 +1650,10 @@ const struct inode_operations reiserfs_dir_inode_operations = {
.mknod = reiserfs_mknod,
.rename = reiserfs_rename,
.setattr = reiserfs_setattr,
.setxattr = reiserfs_setxattr,
.getxattr = reiserfs_getxattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = reiserfs_listxattr,
.removexattr = reiserfs_removexattr,
.removexattr = generic_removexattr,
.permission = reiserfs_permission,
.get_acl = reiserfs_get_acl,
.set_acl = reiserfs_set_acl,
@ -1667,10 +1667,10 @@ const struct inode_operations reiserfs_symlink_inode_operations = {
.readlink = generic_readlink,
.get_link = page_get_link,
.setattr = reiserfs_setattr,
.setxattr = reiserfs_setxattr,
.getxattr = reiserfs_getxattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = reiserfs_listxattr,
.removexattr = reiserfs_removexattr,
.removexattr = generic_removexattr,
.permission = reiserfs_permission,
};
@ -1679,10 +1679,10 @@ const struct inode_operations reiserfs_symlink_inode_operations = {
*/
const struct inode_operations reiserfs_special_inode_operations = {
.setattr = reiserfs_setattr,
.setxattr = reiserfs_setxattr,
.getxattr = reiserfs_getxattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = reiserfs_listxattr,
.removexattr = reiserfs_removexattr,
.removexattr = generic_removexattr,
.permission = reiserfs_permission,
.get_acl = reiserfs_get_acl,
.set_acl = reiserfs_set_acl,

54
fs/reiserfs/xattr.c
View File

@ -764,60 +764,6 @@ find_xattr_handler_prefix(const struct xattr_handler **handlers,
return xah;
}
/*
* Inode operation getxattr()
*/
ssize_t
reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
size_t size)
{
const struct xattr_handler *handler;
handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
if (!handler || get_inode_sd_version(d_inode(dentry)) == STAT_DATA_V1)
return -EOPNOTSUPP;
return handler->get(handler, dentry, name, buffer, size);
}
/*
* Inode operation setxattr()
*
* d_inode(dentry)->i_mutex down
*/
int
reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags)
{
const struct xattr_handler *handler;
handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
if (!handler || get_inode_sd_version(d_inode(dentry)) == STAT_DATA_V1)
return -EOPNOTSUPP;
return handler->set(handler, dentry, name, value, size, flags);
}
/*
* Inode operation removexattr()
*
* d_inode(dentry)->i_mutex down
*/
int reiserfs_removexattr(struct dentry *dentry, const char *name)
{
const struct xattr_handler *handler;
handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
if (!handler || get_inode_sd_version(d_inode(dentry)) == STAT_DATA_V1)
return -EOPNOTSUPP;
return handler->set(handler, dentry, name, NULL, 0, XATTR_REPLACE);
}
struct listxattr_buf {
struct dir_context ctx;
size_t size;

9
fs/reiserfs/xattr.h
View File

@ -2,6 +2,7 @@
#include <linux/init.h>
#include <linux/list.h>
#include <linux/rwsem.h>
#include <linux/xattr.h>
struct inode;
struct dentry;
@ -18,12 +19,7 @@ int reiserfs_permission(struct inode *inode, int mask);
#ifdef CONFIG_REISERFS_FS_XATTR
#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
void *buffer, size_t size);
int reiserfs_setxattr(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags);
ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
int reiserfs_removexattr(struct dentry *dentry, const char *name);
int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
@ -92,10 +88,7 @@ static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
#else
#define reiserfs_getxattr NULL
#define reiserfs_setxattr NULL
#define reiserfs_listxattr NULL
#define reiserfs_removexattr NULL
static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
{

14
fs/reiserfs/xattr_security.c
View File

@ -12,26 +12,24 @@ static int
security_get(const struct xattr_handler *handler, struct dentry *dentry,
const char *name, void *buffer, size_t size)
{
if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
return -EINVAL;
if (IS_PRIVATE(d_inode(dentry)))
return -EPERM;
return reiserfs_xattr_get(d_inode(dentry), name, buffer, size);
return reiserfs_xattr_get(d_inode(dentry),
xattr_full_name(handler, name),
buffer, size);
}
static int
security_set(const struct xattr_handler *handler, struct dentry *dentry,
const char *name, const void *buffer, size_t size, int flags)
{
if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
return -EINVAL;
if (IS_PRIVATE(d_inode(dentry)))
return -EPERM;
return reiserfs_xattr_set(d_inode(dentry), name, buffer, size, flags);
return reiserfs_xattr_set(d_inode(dentry),
xattr_full_name(handler, name),
buffer, size, flags);
}
static bool security_list(struct dentry *dentry)

14
fs/reiserfs/xattr_trusted.c
View File

@ -11,26 +11,24 @@ static int
trusted_get(const struct xattr_handler *handler, struct dentry *dentry,
const char *name, void *buffer, size_t size)
{
if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
return -EPERM;
return reiserfs_xattr_get(d_inode(dentry), name, buffer, size);
return reiserfs_xattr_get(d_inode(dentry),
xattr_full_name(handler, name),
buffer, size);
}
static int
trusted_set(const struct xattr_handler *handler, struct dentry *dentry,
const char *name, const void *buffer, size_t size, int flags)
{
if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
return -EPERM;
return reiserfs_xattr_set(d_inode(dentry), name, buffer, size, flags);
return reiserfs_xattr_set(d_inode(dentry),
xattr_full_name(handler, name),
buffer, size, flags);
}
static bool trusted_list(struct dentry *dentry)

14
fs/reiserfs/xattr_user.c
View File

@ -10,24 +10,22 @@ static int
user_get(const struct xattr_handler *handler, struct dentry *dentry,
const char *name, void *buffer, size_t size)
{
if (strlen(name) < sizeof(XATTR_USER_PREFIX))
return -EINVAL;
if (!reiserfs_xattrs_user(dentry->d_sb))
return -EOPNOTSUPP;
return reiserfs_xattr_get(d_inode(dentry), name, buffer, size);
return reiserfs_xattr_get(d_inode(dentry),
xattr_full_name(handler, name),
buffer, size);
}
static int
user_set(const struct xattr_handler *handler, struct dentry *dentry,
const char *name, const void *buffer, size_t size, int flags)
{
if (strlen(name) < sizeof(XATTR_USER_PREFIX))
return -EINVAL;
if (!reiserfs_xattrs_user(dentry->d_sb))
return -EOPNOTSUPP;
return reiserfs_xattr_set(d_inode(dentry), name, buffer, size, flags);
return reiserfs_xattr_set(d_inode(dentry),
xattr_full_name(handler, name),
buffer, size, flags);
}
static bool user_list(struct dentry *dentry)