Commit 659564c8 authored by Bill Nottingham's avatar Bill Nottingham Committed by Linus Torvalds

[PATCH] Introduce vfs_listxattr

This patch moves code out of fs/xattr.c:listxattr into a new function -
vfs_listxattr. The code for vfs_listxattr was originally submitted by Bill
Nottingham <notting@redhat.com> to Unionfs.

Sorry about that.  The reason for this submission is to make the
listxattr code in fs/xattr.c a little cleaner (as well as to clean up
some code in Unionfs.)

Currently, Unionfs has vfs_listxattr defined in its code.  I think
that's very ugly, and I'd like to see it (re)moved.  The logical place
to put it, is along side of all the other vfs_*xattr functions.

Overall, I think this patch is benefitial for both kernel.org kernel and
Unionfs.
Signed-off-by: default avatarJosef "Jeff" Sipek <jsipek@cs.sunysb.edu>
Acked-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent e069d79d
...@@ -135,6 +135,26 @@ vfs_getxattr(struct dentry *dentry, char *name, void *value, size_t size) ...@@ -135,6 +135,26 @@ vfs_getxattr(struct dentry *dentry, char *name, void *value, size_t size)
} }
EXPORT_SYMBOL_GPL(vfs_getxattr); EXPORT_SYMBOL_GPL(vfs_getxattr);
ssize_t
vfs_listxattr(struct dentry *d, char *list, size_t size)
{
ssize_t error;
error = security_inode_listxattr(d);
if (error)
return error;
error = -EOPNOTSUPP;
if (d->d_inode->i_op && d->d_inode->i_op->listxattr) {
error = d->d_inode->i_op->listxattr(d, list, size);
} else {
error = security_inode_listsecurity(d->d_inode, list, size);
if (size && error > size)
error = -ERANGE;
}
return error;
}
EXPORT_SYMBOL_GPL(vfs_listxattr);
int int
vfs_removexattr(struct dentry *dentry, char *name) vfs_removexattr(struct dentry *dentry, char *name)
{ {
...@@ -346,17 +366,7 @@ listxattr(struct dentry *d, char __user *list, size_t size) ...@@ -346,17 +366,7 @@ listxattr(struct dentry *d, char __user *list, size_t size)
return -ENOMEM; return -ENOMEM;
} }
error = security_inode_listxattr(d); error = vfs_listxattr(d, klist, size);
if (error)
goto out;
error = -EOPNOTSUPP;
if (d->d_inode->i_op && d->d_inode->i_op->listxattr) {
error = d->d_inode->i_op->listxattr(d, klist, size);
} else {
error = security_inode_listsecurity(d->d_inode, klist, size);
if (size && error > size)
error = -ERANGE;
}
if (error > 0) { if (error > 0) {
if (size && copy_to_user(list, klist, error)) if (size && copy_to_user(list, klist, error))
error = -EFAULT; error = -EFAULT;
...@@ -365,7 +375,6 @@ listxattr(struct dentry *d, char __user *list, size_t size) ...@@ -365,7 +375,6 @@ listxattr(struct dentry *d, char __user *list, size_t size)
than XATTR_LIST_MAX bytes. Not possible. */ than XATTR_LIST_MAX bytes. Not possible. */
error = -E2BIG; error = -E2BIG;
} }
out:
kfree(klist); kfree(klist);
return error; return error;
} }
......
...@@ -41,6 +41,7 @@ struct xattr_handler { ...@@ -41,6 +41,7 @@ struct xattr_handler {
}; };
ssize_t vfs_getxattr(struct dentry *, char *, void *, size_t); ssize_t vfs_getxattr(struct dentry *, char *, void *, size_t);
ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
int vfs_setxattr(struct dentry *, char *, void *, size_t, int); int vfs_setxattr(struct dentry *, char *, void *, size_t, int);
int vfs_removexattr(struct dentry *, char *); int vfs_removexattr(struct dentry *, char *);
......
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