/*
- * 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>
+#include <linux/vserver/xid.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,
memset(&va, 0, sizeof(va));
va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
- va.va_type = IFTOVT(mode);
va.va_mode = mode;
switch (mode & S_IFMT) {
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;
- remove_inode_hash(ip);
- make_bad_inode(ip);
- 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);
}
struct dentry *dentry,
struct nameidata *nd)
{
- struct inode *ip = NULL;
- vnode_t *vp, *cvp = NULL;
+ struct vnode *vp = LINVFS_GET_VP(dir), *cvp;
int error;
if (dentry->d_name.len >= MAXNAMELEN)
return ERR_PTR(-ENAMETOOLONG);
- vp = LINVFS_GET_VP(dir);
VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error);
- if (!error) {
- ASSERT(cvp);
- ip = LINVFS_GET_IP(cvp);
- if (!ip) {
- VN_RELE(cvp);
- return ERR_PTR(-EACCES);
- }
+ if (error) {
+ if (unlikely(error != ENOENT))
+ return ERR_PTR(-error);
+ d_add(dentry, NULL);
+ return NULL;
}
- if (error && (error != ENOENT))
- return ERR_PTR(-error);
- return d_splice_alias(ip, dentry);
+ vx_propagate_xid(nd, LINVFS_GET_IP(cvp));
+
+ return d_splice_alias(LINVFS_GET_IP(cvp), dentry);
}
STATIC int
{
struct inode *ip;
vattr_t va;
- vnode_t *dvp; /* directory containing name to remove */
+ vnode_t *dvp; /* directory containing name of symlink */
vnode_t *cvp; /* used to lookup symlink to put in dentry */
int error;
cvp = NULL;
memset(&va, 0, sizeof(va));
- va.va_type = VLNK;
- va.va_mode = irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO;
+ va.va_mode = S_IFLNK |
+ (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO);
va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
error = 0;
VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error);
- if (!error && cvp) {
- ASSERT(cvp->v_type == VLNK);
- 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;
}
return 0;
}
-STATIC int
-linvfs_readlink(
- struct dentry *dentry,
- char *buf,
- int size)
-{
- vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
- uio_t uio;
- iovec_t iov;
- int error;
-
- iov.iov_base = buf;
- iov.iov_len = size;
-
- uio.uio_iov = &iov;
- uio.uio_offset = 0;
- uio.uio_segflg = UIO_USERSPACE;
- uio.uio_resid = size;
- uio.uio_iovcnt = 1;
-
- VOP_READLINK(vp, &uio, 0, NULL, error);
- if (error)
- return -error;
-
- return (size - uio.uio_resid);
-}
-
/*
* careful here - this function can get called recursively, so
* we need to be very careful about how much stack we use.
* uio is kmalloced for this reason...
*/
-STATIC int
+STATIC void *
linvfs_follow_link(
struct dentry *dentry,
struct nameidata *nd)
ASSERT(dentry);
ASSERT(nd);
- link = (char *)kmalloc(MAXNAMELEN+1, GFP_KERNEL);
- if (!link)
- return -ENOMEM;
+ link = (char *)kmalloc(MAXPATHLEN+1, GFP_KERNEL);
+ if (!link) {
+ nd_set_link(nd, ERR_PTR(-ENOMEM));
+ return NULL;
+ }
uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL);
if (!uio) {
kfree(link);
- return -ENOMEM;
+ 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);
if (error) {
- kfree(uio);
kfree(link);
- return -error;
+ link = ERR_PTR(-error);
+ } else {
+ link[MAXPATHLEN - uio->uio_resid] = '\0';
}
-
- link[MAXNAMELEN - uio->uio_resid] = '\0';
kfree(uio);
- /* vfs_follow_link returns (-) errors */
- error = vfs_follow_link(nd, link);
- kfree(link);
- return error;
+ nd_set_link(nd, link);
+ return NULL;
+}
+
+STATIC void
+linvfs_put_link(
+ struct dentry *dentry,
+ struct nameidata *nd,
+ void *p)
+{
+ char *s = nd_get_link(nd);
+
+ if (!IS_ERR(s))
+ kfree(s);
}
#ifdef CONFIG_XFS_POSIX_ACL
return 0;
}
+STATIC int
+linvfs_sync_flags(struct inode *inode)
+{
+ unsigned int oldflags, newflags;
+ vattr_t vattr;
+ int flags = 0;
+ int error;
+ vnode_t *vp = LINVFS_GET_VP(inode);
+
+ memset(&vattr, 0, sizeof(vattr_t));
+
+ vattr.va_mask = XFS_AT_XFLAGS;
+ VOP_GETATTR(vp, &vattr, 0, NULL, error);
+ if (error)
+ return error;
+ oldflags = vattr.va_xflags;
+ newflags = oldflags & ~(XFS_XFLAG_IMMUTABLE |
+ XFS_XFLAG_IUNLINK | XFS_XFLAG_BARRIER);
+
+ if (IS_IMMUTABLE(inode))
+ newflags |= XFS_XFLAG_IMMUTABLE;
+ if (IS_IUNLINK(inode))
+ newflags |= XFS_XFLAG_IUNLINK;
+ if (IS_BARRIER(inode))
+ newflags |= XFS_XFLAG_BARRIER;
+
+ if (oldflags ^ newflags) {
+ vattr.va_xflags = newflags;
+ vattr.va_mask |= XFS_AT_XFLAGS;
+ VOP_SETATTR(vp, &vattr, flags, NULL, error);
+ }
+ vn_revalidate(vp);
+ return error;
+}
+
STATIC int
linvfs_setattr(
struct dentry *dentry,
int flags = 0;
int error;
+ error = inode_change_ok(inode, attr);
+ if (error)
+ return error;
+
memset(&vattr, 0, sizeof(vattr_t));
if (ia_valid & ATTR_UID) {
vattr.va_mask |= XFS_AT_UID;
vattr.va_mask |= XFS_AT_GID;
vattr.va_gid = attr->ia_gid;
}
+ if ((ia_valid & ATTR_XID) && IS_TAGXID(inode)) {
+ vattr.va_mask |= XFS_AT_XID;
+ vattr.va_xid = attr->ia_xid;
+ }
if (ia_valid & ATTR_SIZE) {
vattr.va_mask |= XFS_AT_SIZE;
vattr.va_size = attr->ia_size;
if (ia_valid & ATTR_ATIME) {
vattr.va_mask |= XFS_AT_ATIME;
vattr.va_atime = attr->ia_atime;
+ inode->i_atime = attr->ia_atime;
}
if (ia_valid & ATTR_MTIME) {
vattr.va_mask |= XFS_AT_MTIME;
.getxattr = linvfs_getxattr,
.listxattr = linvfs_listxattr,
.removexattr = linvfs_removexattr,
+ .sync_flags = linvfs_sync_flags,
};
struct inode_operations linvfs_dir_inode_operations = {
.getxattr = linvfs_getxattr,
.listxattr = linvfs_listxattr,
.removexattr = linvfs_removexattr,
+ .sync_flags = linvfs_sync_flags,
};
struct inode_operations linvfs_symlink_inode_operations = {
- .readlink = linvfs_readlink,
+ .readlink = generic_readlink,
.follow_link = linvfs_follow_link,
+ .put_link = linvfs_put_link,
.permission = linvfs_permission,
.getattr = linvfs_getattr,
.setattr = linvfs_setattr,
.getxattr = linvfs_getxattr,
.listxattr = linvfs_listxattr,
.removexattr = linvfs_removexattr,
+ .sync_flags = linvfs_sync_flags,
};
git://git.onelab.eu / linux-2.6.git / blobdiff