/*
- * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
*
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-
#include "xfs.h"
#include "xfs_fs.h"
-#include "xfs_inum.h"
+#include "xfs_bit.h"
#include "xfs_log.h"
+#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_dmapi.h"
#include "xfs_quota.h"
#include "xfs_mount.h"
-#include "xfs_alloc_btree.h"
#include "xfs_bmap_btree.h"
+#include "xfs_alloc_btree.h"
#include "xfs_ialloc_btree.h"
-#include "xfs_btree.h"
-#include "xfs_ialloc.h"
-#include "xfs_attr_sf.h"
#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
+#include "xfs_attr_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_bmap.h"
-#include "xfs_bit.h"
+#include "xfs_btree.h"
+#include "xfs_ialloc.h"
#include "xfs_rtalloc.h"
#include "xfs_error.h"
#include "xfs_itable.h"
#include "xfs_buf_item.h"
#include "xfs_utils.h"
+#include <linux/capability.h>
#include <linux/xattr.h>
#include <linux/namei.h>
+#include <linux/security.h>
+
+/*
+ * Get a XFS inode from a given vnode.
+ */
+xfs_inode_t *
+xfs_vtoi(
+ struct vnode *vp)
+{
+ bhv_desc_t *bdp;
+
+ bdp = bhv_lookup_range(VN_BHV_HEAD(vp),
+ VNODE_POSITION_XFS, VNODE_POSITION_XFS);
+ if (unlikely(bdp == NULL))
+ return NULL;
+ return XFS_BHVTOI(bdp);
+}
+
+/*
+ * Bring the atime in the XFS inode uptodate.
+ * Used before logging the inode to disk or when the Linux inode goes away.
+ */
+void
+xfs_synchronize_atime(
+ xfs_inode_t *ip)
+{
+ vnode_t *vp;
+
+ vp = XFS_ITOV_NULL(ip);
+ if (vp) {
+ struct inode *inode = &vp->v_inode;
+ ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
+ ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
+ }
+}
+
+/*
+ * Change the requested timestamp in the given inode.
+ * We don't lock across timestamp updates, and we don't log them but
+ * we do record the fact that there is dirty information in core.
+ *
+ * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG
+ * with XFS_ICHGTIME_ACC to be sure that access time
+ * update will take. Calling first with XFS_ICHGTIME_ACC
+ * and then XFS_ICHGTIME_MOD may fail to modify the access
+ * timestamp if the filesystem is mounted noacctm.
+ */
+void
+xfs_ichgtime(
+ xfs_inode_t *ip,
+ int flags)
+{
+ struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip));
+ timespec_t tv;
+
+ nanotime(&tv);
+ if (flags & XFS_ICHGTIME_MOD) {
+ inode->i_mtime = tv;
+ ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
+ ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
+ }
+ if (flags & XFS_ICHGTIME_ACC) {
+ inode->i_atime = tv;
+ ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec;
+ ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec;
+ }
+ if (flags & XFS_ICHGTIME_CHG) {
+ inode->i_ctime = tv;
+ ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
+ ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
+ }
+
+ /*
+ * We update the i_update_core field _after_ changing
+ * the timestamps in order to coordinate properly with
+ * xfs_iflush() so that we don't lose timestamp updates.
+ * This keeps us from having to hold the inode lock
+ * while doing this. We use the SYNCHRONIZE macro to
+ * ensure that the compiler does not reorder the update
+ * of i_update_core above the timestamp updates above.
+ */
+ SYNCHRONIZE();
+ ip->i_update_core = 1;
+ if (!(inode->i_state & I_LOCK))
+ mark_inode_dirty_sync(inode);
+}
+
+/*
+ * Variant on the above which avoids querying the system clock
+ * in situations where we know the Linux inode timestamps have
+ * just been updated (and so we can update our inode cheaply).
+ */
+void
+xfs_ichgtime_fast(
+ xfs_inode_t *ip,
+ struct inode *inode,
+ int flags)
+{
+ timespec_t *tvp;
+
+ /*
+ * Atime updates for read() & friends are handled lazily now, and
+ * explicit updates must go through xfs_ichgtime()
+ */
+ ASSERT((flags & XFS_ICHGTIME_ACC) == 0);
+
+ /*
+ * We're not supposed to change timestamps in readonly-mounted
+ * filesystems. Throw it away if anyone asks us.
+ */
+ if (unlikely(IS_RDONLY(inode)))
+ return;
+
+ if (flags & XFS_ICHGTIME_MOD) {
+ tvp = &inode->i_mtime;
+ ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec;
+ ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec;
+ }
+ if (flags & XFS_ICHGTIME_CHG) {
+ tvp = &inode->i_ctime;
+ ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec;
+ ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec;
+ }
+
+ /*
+ * We update the i_update_core field _after_ changing
+ * the timestamps in order to coordinate properly with
+ * xfs_iflush() so that we don't lose timestamp updates.
+ * This keeps us from having to hold the inode lock
+ * while doing this. We use the SYNCHRONIZE macro to
+ * ensure that the compiler does not reorder the update
+ * of i_update_core above the timestamp updates above.
+ */
+ SYNCHRONIZE();
+ ip->i_update_core = 1;
+ if (!(inode->i_state & I_LOCK))
+ mark_inode_dirty_sync(inode);
+}
/*
ip->i_nlink = va.va_nlink;
ip->i_blocks = va.va_nblocks;
- /* we're under i_sem so i_size can't change under us */
+ /* we're under i_mutex so i_size can't change under us */
if (i_size_read(ip) != va.va_size)
i_size_write(ip, va.va_size);
}
}
+/*
+ * Hook in SELinux. This is not quite correct yet, what we really need
+ * here (as we do for default ACLs) is a mechanism by which creation of
+ * these attrs can be journalled at inode creation time (along with the
+ * inode, of course, such that log replay can't cause these to be lost).
+ */
+STATIC int
+linvfs_init_security(
+ struct vnode *vp,
+ struct inode *dir)
+{
+ struct inode *ip = LINVFS_GET_IP(vp);
+ size_t length;
+ void *value;
+ char *name;
+ int error;
+
+ error = security_inode_init_security(ip, dir, &name, &value, &length);
+ if (error) {
+ if (error == -EOPNOTSUPP)
+ return 0;
+ return -error;
+ }
+
+ VOP_ATTR_SET(vp, name, value, length, ATTR_SECURE, NULL, error);
+ if (!error)
+ VMODIFY(vp);
+
+ kfree(name);
+ kfree(value);
+ return error;
+}
+
/*
* Determine whether a process has a valid fs_struct (kernel daemons
* like knfsd don't have an fs_struct).
return (task->fs != init_task.fs);
}
+STATIC inline void
+cleanup_inode(
+ vnode_t *dvp,
+ vnode_t *vp,
+ struct dentry *dentry,
+ int mode)
+{
+ struct dentry teardown = {};
+ int err2;
+
+ /* Oh, the horror.
+ * If we can't add the ACL or we fail in
+ * linvfs_init_security we must back out.
+ * ENOSPC can hit here, among other things.
+ */
+ teardown.d_inode = LINVFS_GET_IP(vp);
+ teardown.d_name = dentry->d_name;
+
+ if (S_ISDIR(mode))
+ VOP_RMDIR(dvp, &teardown, NULL, err2);
+ else
+ VOP_REMOVE(dvp, &teardown, NULL, err2);
+ VN_RELE(vp);
+}
+
STATIC int
linvfs_mknod(
struct inode *dir,
break;
}
+ if (!error)
+ {
+ error = linvfs_init_security(vp, dir);
+ if (error)
+ cleanup_inode(dvp, vp, dentry, mode);
+ }
+
if (default_acl) {
if (!error) {
error = _ACL_INHERIT(vp, &va, default_acl);
- if (!error) {
+ if (!error)
VMODIFY(vp);
- } else {
- struct dentry teardown = {};
- int err2;
-
- /* Oh, the horror.
- * If we can't add the ACL we must back out.
- * ENOSPC can hit here, among other things.
- */
- teardown.d_inode = ip = LINVFS_GET_IP(vp);
- teardown.d_name = dentry->d_name;
-
- vn_mark_bad(vp);
-
- if (S_ISDIR(mode))
- VOP_RMDIR(dvp, &teardown, NULL, err2);
- else
- VOP_REMOVE(dvp, &teardown, NULL, err2);
- VN_RELE(vp);
- }
+ else
+ cleanup_inode(dvp, vp, dentry, mode);
}
_ACL_FREE(default_acl);
}
error = 0;
VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error);
- if (!error && cvp) {
- ip = LINVFS_GET_IP(cvp);
- d_instantiate(dentry, ip);
- validate_fields(dir);
- validate_fields(ip); /* size needs update */
+ if (likely(!error && cvp)) {
+ error = linvfs_init_security(cvp, dir);
+ if (likely(!error)) {
+ ip = LINVFS_GET_IP(cvp);
+ d_instantiate(dentry, ip);
+ validate_fields(dir);
+ validate_fields(ip);
+ }
}
return -error;
}
ASSERT(dentry);
ASSERT(nd);
- link = (char *)kmalloc(MAXNAMELEN+1, GFP_KERNEL);
+ link = (char *)kmalloc(MAXPATHLEN+1, GFP_KERNEL);
if (!link) {
nd_set_link(nd, ERR_PTR(-ENOMEM));
return NULL;
vp = LINVFS_GET_VP(dentry->d_inode);
iov.iov_base = link;
- iov.iov_len = MAXNAMELEN;
+ iov.iov_len = MAXPATHLEN;
uio->uio_iov = &iov;
uio->uio_offset = 0;
uio->uio_segflg = UIO_SYSSPACE;
- uio->uio_resid = MAXNAMELEN;
+ uio->uio_resid = MAXPATHLEN;
uio->uio_iovcnt = 1;
VOP_READLINK(vp, uio, 0, NULL, error);
kfree(link);
link = ERR_PTR(-error);
} else {
- link[MAXNAMELEN - uio->uio_resid] = '\0';
+ link[MAXPATHLEN - uio->uio_resid] = '\0';
}
kfree(uio);
if (ia_valid & ATTR_ATIME) {
vattr.va_mask |= XFS_AT_ATIME;
vattr.va_atime = attr->ia_atime;
+ if (ia_valid & ATTR_ATIME_SET)
+ inode->i_atime = attr->ia_atime;
}
if (ia_valid & ATTR_MTIME) {
vattr.va_mask |= XFS_AT_MTIME;
git.openpandora.org / pandora-kernel.git / blobdiff