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Implement extattr_{delete,get,set}_link() system calls: extended attribute

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operations that do not follow links.  Sync to MAC tree.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
This commit is contained in:
Robert Watson 2002-10-09 21:48:22 +00:00
parent 233d463548
commit 6f90723cad
2 changed files with 180 additions and 0 deletions
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90
sys/kern/vfs_extattr.c
View File

@ -3898,6 +3898,37 @@ extattr_set_fd(td, uap)
return (error);
}
int
extattr_set_link(td, uap)
struct thread *td;
struct extattr_set_link_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
syscallarg(void *) data;
syscallarg(size_t) nbytes;
} */ *uap;
{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, td);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = extattr_set_vp(nd.ni_vp, uap->attrnamespace, attrname,
uap->data, uap->nbytes, td);
vrele(nd.ni_vp);
return (error);
}
/*-
* Get a named extended attribute on a file or directory
*
@ -4028,6 +4059,37 @@ extattr_get_fd(td, uap)
return (error);
}
int
extattr_get_link(td, uap)
struct thread *td;
struct extattr_get_link_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
syscallarg(void *) data;
syscallarg(size_t) nbytes;
} */ *uap;
{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, td);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = extattr_get_vp(nd.ni_vp, uap->attrnamespace, attrname,
uap->data, uap->nbytes, td);
vrele(nd.ni_vp);
return (error);
}
/*
* extattr_delete_vp(): Delete a named extended attribute on a file or
* directory
@ -4118,3 +4180,31 @@ extattr_delete_fd(td, uap)
fdrop(fp, td);
return (error);
}
int
extattr_delete_link(td, uap)
struct thread *td;
struct extattr_delete_link_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
} */ *uap;
{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
if (error)
return(error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, td);
if ((error = namei(&nd)) != 0)
return(error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = extattr_delete_vp(nd.ni_vp, uap->attrnamespace, attrname, td);
vrele(nd.ni_vp);
return(error);
}

90
sys/kern/vfs_syscalls.c
View File

@ -3898,6 +3898,37 @@ extattr_set_fd(td, uap)
return (error);
}
int
extattr_set_link(td, uap)
struct thread *td;
struct extattr_set_link_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
syscallarg(void *) data;
syscallarg(size_t) nbytes;
} */ *uap;
{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, td);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = extattr_set_vp(nd.ni_vp, uap->attrnamespace, attrname,
uap->data, uap->nbytes, td);
vrele(nd.ni_vp);
return (error);
}
/*-
* Get a named extended attribute on a file or directory
*
@ -4028,6 +4059,37 @@ extattr_get_fd(td, uap)
return (error);
}
int
extattr_get_link(td, uap)
struct thread *td;
struct extattr_get_link_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
syscallarg(void *) data;
syscallarg(size_t) nbytes;
} */ *uap;
{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, td);
if ((error = namei(&nd)) != 0)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = extattr_get_vp(nd.ni_vp, uap->attrnamespace, attrname,
uap->data, uap->nbytes, td);
vrele(nd.ni_vp);
return (error);
}
/*
* extattr_delete_vp(): Delete a named extended attribute on a file or
* directory
@ -4118,3 +4180,31 @@ extattr_delete_fd(td, uap)
fdrop(fp, td);
return (error);
}
int
extattr_delete_link(td, uap)
struct thread *td;
struct extattr_delete_link_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
} */ *uap;
{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
if (error)
return(error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, td);
if ((error = namei(&nd)) != 0)
return(error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = extattr_delete_vp(nd.ni_vp, uap->attrnamespace, attrname, td);
vrele(nd.ni_vp);
return(error);
}