[XFS] xfs_setattr currently doesn't just handle the attributes set through
->setattr but also addition XFS-specific attributes: project id, inode
flags and extent size hint. Having these in a single function makes it
more complicated and forces to have us a bhv_vattr intermediate structure
eating up stackspace.
This patch adds a new xfs_ioctl_setattr helper for the XFS ioctls that set
these attributes and remove the code to set them through xfs_setattr.
SGI-PV: 984564
SGI-Modid: xfs-linux-melb:xfs-kern:31677a
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index 8eddaff..d2bbb05 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -48,6 +48,8 @@
#include "xfs_dfrag.h"
#include "xfs_fsops.h"
#include "xfs_vnodeops.h"
+#include "xfs_quota.h"
+#include "xfs_inode_item.h"
#include <linux/capability.h>
#include <linux/dcache.h>
@@ -879,6 +881,297 @@
return 0;
}
+STATIC void
+xfs_set_diflags(
+ struct xfs_inode *ip,
+ unsigned int xflags)
+{
+ unsigned int di_flags;
+
+ /* can't set PREALLOC this way, just preserve it */
+ di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
+ if (xflags & XFS_XFLAG_IMMUTABLE)
+ di_flags |= XFS_DIFLAG_IMMUTABLE;
+ if (xflags & XFS_XFLAG_APPEND)
+ di_flags |= XFS_DIFLAG_APPEND;
+ if (xflags & XFS_XFLAG_SYNC)
+ di_flags |= XFS_DIFLAG_SYNC;
+ if (xflags & XFS_XFLAG_NOATIME)
+ di_flags |= XFS_DIFLAG_NOATIME;
+ if (xflags & XFS_XFLAG_NODUMP)
+ di_flags |= XFS_DIFLAG_NODUMP;
+ if (xflags & XFS_XFLAG_PROJINHERIT)
+ di_flags |= XFS_DIFLAG_PROJINHERIT;
+ if (xflags & XFS_XFLAG_NODEFRAG)
+ di_flags |= XFS_DIFLAG_NODEFRAG;
+ if (xflags & XFS_XFLAG_FILESTREAM)
+ di_flags |= XFS_DIFLAG_FILESTREAM;
+ if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
+ if (xflags & XFS_XFLAG_RTINHERIT)
+ di_flags |= XFS_DIFLAG_RTINHERIT;
+ if (xflags & XFS_XFLAG_NOSYMLINKS)
+ di_flags |= XFS_DIFLAG_NOSYMLINKS;
+ if (xflags & XFS_XFLAG_EXTSZINHERIT)
+ di_flags |= XFS_DIFLAG_EXTSZINHERIT;
+ } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
+ if (xflags & XFS_XFLAG_REALTIME)
+ di_flags |= XFS_DIFLAG_REALTIME;
+ if (xflags & XFS_XFLAG_EXTSIZE)
+ di_flags |= XFS_DIFLAG_EXTSIZE;
+ }
+
+ ip->i_d.di_flags = di_flags;
+}
+
+
+#define FSX_PROJID 1
+#define FSX_EXTSIZE 2
+#define FSX_XFLAGS 4
+#define FSX_NONBLOCK 8
+
+STATIC int
+xfs_ioctl_setattr(
+ xfs_inode_t *ip,
+ struct fsxattr *fa,
+ int mask)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_trans *tp;
+ unsigned int lock_flags = 0;
+ struct xfs_dquot *udqp = NULL, *gdqp = NULL;
+ struct xfs_dquot *olddquot = NULL;
+ int code;
+
+ xfs_itrace_entry(ip);
+
+ if (mp->m_flags & XFS_MOUNT_RDONLY)
+ return XFS_ERROR(EROFS);
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ /*
+ * If disk quotas is on, we make sure that the dquots do exist on disk,
+ * before we start any other transactions. Trying to do this later
+ * is messy. We don't care to take a readlock to look at the ids
+ * in inode here, because we can't hold it across the trans_reserve.
+ * If the IDs do change before we take the ilock, we're covered
+ * because the i_*dquot fields will get updated anyway.
+ */
+ if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
+ code = XFS_QM_DQVOPALLOC(mp, ip, ip->i_d.di_uid,
+ ip->i_d.di_gid, fa->fsx_projid,
+ XFS_QMOPT_PQUOTA, &udqp, &gdqp);
+ if (code)
+ return code;
+ }
+
+ /*
+ * For the other attributes, we acquire the inode lock and
+ * first do an error checking pass.
+ */
+ tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
+ code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
+ if (code)
+ goto error_return;
+
+ lock_flags = XFS_ILOCK_EXCL;
+ xfs_ilock(ip, lock_flags);
+
+ /*
+ * CAP_FOWNER overrides the following restrictions:
+ *
+ * The user ID of the calling process must be equal
+ * to the file owner ID, except in cases where the
+ * CAP_FSETID capability is applicable.
+ */
+ if (current->fsuid != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
+ code = XFS_ERROR(EPERM);
+ goto error_return;
+ }
+
+ /*
+ * Do a quota reservation only if projid is actually going to change.
+ */
+ if (mask & FSX_PROJID) {
+ if (XFS_IS_PQUOTA_ON(mp) &&
+ ip->i_d.di_projid != fa->fsx_projid) {
+ ASSERT(tp);
+ code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
+ capable(CAP_FOWNER) ?
+ XFS_QMOPT_FORCE_RES : 0);
+ if (code) /* out of quota */
+ goto error_return;
+ }
+ }
+
+ if (mask & FSX_EXTSIZE) {
+ /*
+ * Can't change extent size if any extents are allocated.
+ */
+ if (ip->i_d.di_nextents &&
+ ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
+ fa->fsx_extsize)) {
+ code = XFS_ERROR(EINVAL); /* EFBIG? */
+ goto error_return;
+ }
+
+ /*
+ * Extent size must be a multiple of the appropriate block
+ * size, if set at all.
+ */
+ if (fa->fsx_extsize != 0) {
+ xfs_extlen_t size;
+
+ if (XFS_IS_REALTIME_INODE(ip) ||
+ ((mask & FSX_XFLAGS) &&
+ (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
+ size = mp->m_sb.sb_rextsize <<
+ mp->m_sb.sb_blocklog;
+ } else {
+ size = mp->m_sb.sb_blocksize;
+ }
+
+ if (fa->fsx_extsize % size) {
+ code = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+ }
+ }
+
+
+ if (mask & FSX_XFLAGS) {
+ /*
+ * Can't change realtime flag if any extents are allocated.
+ */
+ if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
+ (XFS_IS_REALTIME_INODE(ip)) !=
+ (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
+ code = XFS_ERROR(EINVAL); /* EFBIG? */
+ goto error_return;
+ }
+
+ /*
+ * If realtime flag is set then must have realtime data.
+ */
+ if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
+ if ((mp->m_sb.sb_rblocks == 0) ||
+ (mp->m_sb.sb_rextsize == 0) ||
+ (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
+ code = XFS_ERROR(EINVAL);
+ goto error_return;
+ }
+ }
+
+ /*
+ * Can't modify an immutable/append-only file unless
+ * we have appropriate permission.
+ */
+ if ((ip->i_d.di_flags &
+ (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
+ (fa->fsx_xflags &
+ (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
+ !capable(CAP_LINUX_IMMUTABLE)) {
+ code = XFS_ERROR(EPERM);
+ goto error_return;
+ }
+ }
+
+ xfs_trans_ijoin(tp, ip, lock_flags);
+ xfs_trans_ihold(tp, ip);
+
+ /*
+ * Change file ownership. Must be the owner or privileged.
+ * If the system was configured with the "restricted_chown"
+ * option, the owner is not permitted to give away the file,
+ * and can change the group id only to a group of which he
+ * or she is a member.
+ */
+ if (mask & FSX_PROJID) {
+ /*
+ * CAP_FSETID overrides the following restrictions:
+ *
+ * The set-user-ID and set-group-ID bits of a file will be
+ * cleared upon successful return from chown()
+ */
+ if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
+ !capable(CAP_FSETID))
+ ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
+
+ /*
+ * Change the ownerships and register quota modifications
+ * in the transaction.
+ */
+ if (ip->i_d.di_projid != fa->fsx_projid) {
+ if (XFS_IS_PQUOTA_ON(mp)) {
+ olddquot = XFS_QM_DQVOPCHOWN(mp, tp, ip,
+ &ip->i_gdquot, gdqp);
+ }
+ ip->i_d.di_projid = fa->fsx_projid;
+
+ /*
+ * We may have to rev the inode as well as
+ * the superblock version number since projids didn't
+ * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
+ */
+ if (ip->i_d.di_version == XFS_DINODE_VERSION_1)
+ xfs_bump_ino_vers2(tp, ip);
+ }
+
+ }
+
+ if (mask & FSX_EXTSIZE)
+ ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
+ if (mask & FSX_XFLAGS)
+ xfs_set_diflags(ip, fa->fsx_xflags);
+
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
+
+ XFS_STATS_INC(xs_ig_attrchg);
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * transaction goes to disk before returning to the user.
+ * This is slightly sub-optimal in that truncates require
+ * two sync transactions instead of one for wsync filesystems.
+ * One for the truncate and one for the timestamps since we
+ * don't want to change the timestamps unless we're sure the
+ * truncate worked. Truncates are less than 1% of the laddis
+ * mix so this probably isn't worth the trouble to optimize.
+ */
+ if (mp->m_flags & XFS_MOUNT_WSYNC)
+ xfs_trans_set_sync(tp);
+ code = xfs_trans_commit(tp, 0);
+ xfs_iunlock(ip, lock_flags);
+
+ /*
+ * Release any dquot(s) the inode had kept before chown.
+ */
+ XFS_QM_DQRELE(mp, olddquot);
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+
+ if (code)
+ return code;
+
+ if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
+ XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
+ NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
+ (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
+ }
+
+ vn_revalidate(XFS_ITOV(ip)); /* update flags */
+ return 0;
+
+ error_return:
+ XFS_QM_DQRELE(mp, udqp);
+ XFS_QM_DQRELE(mp, gdqp);
+ xfs_trans_cancel(tp, 0);
+ if (lock_flags)
+ xfs_iunlock(ip, lock_flags);
+ return code;
+}
+
STATIC int
xfs_ioc_fssetxattr(
xfs_inode_t *ip,
@@ -886,31 +1179,16 @@
void __user *arg)
{
struct fsxattr fa;
- struct bhv_vattr *vattr;
- int error;
- int attr_flags;
+ unsigned int mask;
if (copy_from_user(&fa, arg, sizeof(fa)))
return -EFAULT;
- vattr = kmalloc(sizeof(*vattr), GFP_KERNEL);
- if (unlikely(!vattr))
- return -ENOMEM;
-
- attr_flags = 0;
+ mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
- attr_flags |= ATTR_NONBLOCK;
+ mask |= FSX_NONBLOCK;
- vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | XFS_AT_PROJID;
- vattr->va_xflags = fa.fsx_xflags;
- vattr->va_extsize = fa.fsx_extsize;
- vattr->va_projid = fa.fsx_projid;
-
- error = -xfs_setattr(ip, vattr, attr_flags, NULL);
- if (!error)
- vn_revalidate(XFS_ITOV(ip)); /* update flags */
- kfree(vattr);
- return 0;
+ return -xfs_ioctl_setattr(ip, &fa, mask);
}
STATIC int
@@ -932,10 +1210,9 @@
struct file *filp,
void __user *arg)
{
- struct bhv_vattr *vattr;
+ struct fsxattr fa;
unsigned int flags;
- int attr_flags;
- int error;
+ unsigned int mask;
if (copy_from_user(&flags, arg, sizeof(flags)))
return -EFAULT;
@@ -945,22 +1222,12 @@
FS_SYNC_FL))
return -EOPNOTSUPP;
- vattr = kmalloc(sizeof(*vattr), GFP_KERNEL);
- if (unlikely(!vattr))
- return -ENOMEM;
-
- attr_flags = 0;
+ mask = FSX_XFLAGS;
if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
- attr_flags |= ATTR_NONBLOCK;
+ mask |= FSX_NONBLOCK;
+ fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
- vattr->va_mask = XFS_AT_XFLAGS;
- vattr->va_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
-
- error = -xfs_setattr(ip, vattr, attr_flags, NULL);
- if (likely(!error))
- vn_revalidate(XFS_ITOV(ip)); /* update flags */
- kfree(vattr);
- return error;
+ return -xfs_ioctl_setattr(ip, &fa, mask);
}
STATIC int