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path: root/fs/xfs/linux-2.6/xfs_ioctl.c
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Diffstat (limited to 'fs/xfs/linux-2.6/xfs_ioctl.c')
-rw-r--r--fs/xfs/linux-2.6/xfs_ioctl.c226
1 files changed, 122 insertions, 104 deletions
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index d3438c72dcaf..67205f6198ba 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -68,26 +68,22 @@
* XFS_IOC_PATH_TO_HANDLE
* returns full handle for a path
*/
-STATIC int
+int
xfs_find_handle(
unsigned int cmd,
- void __user *arg)
+ xfs_fsop_handlereq_t *hreq)
{
int hsize;
xfs_handle_t handle;
- xfs_fsop_handlereq_t hreq;
struct inode *inode;
- if (copy_from_user(&hreq, arg, sizeof(hreq)))
- return -XFS_ERROR(EFAULT);
-
memset((char *)&handle, 0, sizeof(handle));
switch (cmd) {
case XFS_IOC_PATH_TO_FSHANDLE:
case XFS_IOC_PATH_TO_HANDLE: {
struct path path;
- int error = user_lpath((const char __user *)hreq.path, &path);
+ int error = user_lpath((const char __user *)hreq->path, &path);
if (error)
return error;
@@ -101,7 +97,7 @@ xfs_find_handle(
case XFS_IOC_FD_TO_HANDLE: {
struct file *file;
- file = fget(hreq.fd);
+ file = fget(hreq->fd);
if (!file)
return -EBADF;
@@ -158,8 +154,8 @@ xfs_find_handle(
}
/* now copy our handle into the user buffer & write out the size */
- if (copy_to_user(hreq.ohandle, &handle, hsize) ||
- copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) {
+ if (copy_to_user(hreq->ohandle, &handle, hsize) ||
+ copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) {
iput(inode);
return -XFS_ERROR(EFAULT);
}
@@ -249,27 +245,25 @@ xfs_vget_fsop_handlereq(
return 0;
}
-STATIC int
+int
xfs_open_by_handle(
xfs_mount_t *mp,
- void __user *arg,
+ xfs_fsop_handlereq_t *hreq,
struct file *parfilp,
struct inode *parinode)
{
+ const struct cred *cred = current_cred();
int error;
int new_fd;
int permflag;
struct file *filp;
struct inode *inode;
struct dentry *dentry;
- xfs_fsop_handlereq_t hreq;
if (!capable(CAP_SYS_ADMIN))
return -XFS_ERROR(EPERM);
- if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
- return -XFS_ERROR(EFAULT);
- error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &inode);
+ error = xfs_vget_fsop_handlereq(mp, parinode, hreq, &inode);
if (error)
return -error;
@@ -280,10 +274,10 @@ xfs_open_by_handle(
}
#if BITS_PER_LONG != 32
- hreq.oflags |= O_LARGEFILE;
+ hreq->oflags |= O_LARGEFILE;
#endif
/* Put open permission in namei format. */
- permflag = hreq.oflags;
+ permflag = hreq->oflags;
if ((permflag+1) & O_ACCMODE)
permflag++;
if (permflag & O_TRUNC)
@@ -321,15 +315,16 @@ xfs_open_by_handle(
mntget(parfilp->f_path.mnt);
/* Create file pointer. */
- filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags);
+ filp = dentry_open(dentry, parfilp->f_path.mnt, hreq->oflags, cred);
if (IS_ERR(filp)) {
put_unused_fd(new_fd);
return -XFS_ERROR(-PTR_ERR(filp));
}
+
if (inode->i_mode & S_IFREG) {
/* invisible operation should not change atime */
filp->f_flags |= O_NOATIME;
- filp->f_op = &xfs_invis_file_operations;
+ filp->f_mode |= FMODE_NOCMTIME;
}
fd_install(new_fd, filp);
@@ -362,24 +357,21 @@ do_readlink(
}
-STATIC int
+int
xfs_readlink_by_handle(
xfs_mount_t *mp,
- void __user *arg,
+ xfs_fsop_handlereq_t *hreq,
struct inode *parinode)
{
struct inode *inode;
- xfs_fsop_handlereq_t hreq;
__u32 olen;
void *link;
int error;
if (!capable(CAP_SYS_ADMIN))
return -XFS_ERROR(EPERM);
- if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
- return -XFS_ERROR(EFAULT);
- error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &inode);
+ error = xfs_vget_fsop_handlereq(mp, parinode, hreq, &inode);
if (error)
return -error;
@@ -389,7 +381,7 @@ xfs_readlink_by_handle(
goto out_iput;
}
- if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) {
+ if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
error = -XFS_ERROR(EFAULT);
goto out_iput;
}
@@ -401,7 +393,7 @@ xfs_readlink_by_handle(
error = -xfs_readlink(XFS_I(inode), link);
if (error)
goto out_kfree;
- error = do_readlink(hreq.ohandle, olen, link);
+ error = do_readlink(hreq->ohandle, olen, link);
if (error)
goto out_kfree;
@@ -500,7 +492,7 @@ xfs_attrlist_by_handle(
return -error;
}
-STATIC int
+int
xfs_attrmulti_attr_get(
struct inode *inode,
char *name,
@@ -529,7 +521,7 @@ xfs_attrmulti_attr_get(
return error;
}
-STATIC int
+int
xfs_attrmulti_attr_set(
struct inode *inode,
char *name,
@@ -559,7 +551,7 @@ xfs_attrmulti_attr_set(
return error;
}
-STATIC int
+int
xfs_attrmulti_attr_remove(
struct inode *inode,
char *name,
@@ -661,19 +653,26 @@ xfs_attrmulti_by_handle(
return -error;
}
-STATIC int
+int
xfs_ioc_space(
struct xfs_inode *ip,
struct inode *inode,
struct file *filp,
int ioflags,
unsigned int cmd,
- void __user *arg)
+ xfs_flock64_t *bf)
{
- xfs_flock64_t bf;
int attr_flags = 0;
int error;
+ /*
+ * Only allow the sys admin to reserve space unless
+ * unwritten extents are enabled.
+ */
+ if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
+ !capable(CAP_SYS_ADMIN))
+ return -XFS_ERROR(EPERM);
+
if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
return -XFS_ERROR(EPERM);
@@ -683,16 +682,12 @@ xfs_ioc_space(
if (!S_ISREG(inode->i_mode))
return -XFS_ERROR(EINVAL);
- if (copy_from_user(&bf, arg, sizeof(bf)))
- return -XFS_ERROR(EFAULT);
-
if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
attr_flags |= XFS_ATTR_NONBLOCK;
if (ioflags & IO_INVIS)
attr_flags |= XFS_ATTR_DMI;
- error = xfs_change_file_space(ip, cmd, &bf, filp->f_pos,
- NULL, attr_flags);
+ error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
return -error;
}
@@ -1007,7 +1002,7 @@ xfs_ioctl_setattr(
* 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)) {
+ if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
code = XFS_ERROR(EPERM);
goto error_return;
}
@@ -1104,10 +1099,6 @@ xfs_ioctl_setattr(
/*
* 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) {
/*
@@ -1136,7 +1127,7 @@ xfs_ioctl_setattr(
* 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)
+ if (ip->i_d.di_version == 1)
xfs_bump_ino_vers2(tp, ip);
}
@@ -1255,43 +1246,67 @@ xfs_ioc_setxflags(
}
STATIC int
+xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
+{
+ struct getbmap __user *base = *ap;
+
+ /* copy only getbmap portion (not getbmapx) */
+ if (copy_to_user(base, bmv, sizeof(struct getbmap)))
+ return XFS_ERROR(EFAULT);
+
+ *ap += sizeof(struct getbmap);
+ return 0;
+}
+
+STATIC int
xfs_ioc_getbmap(
struct xfs_inode *ip,
int ioflags,
unsigned int cmd,
void __user *arg)
{
- struct getbmap bm;
- int iflags;
+ struct getbmapx bmx;
int error;
- if (copy_from_user(&bm, arg, sizeof(bm)))
+ if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
return -XFS_ERROR(EFAULT);
- if (bm.bmv_count < 2)
+ if (bmx.bmv_count < 2)
return -XFS_ERROR(EINVAL);
- iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
+ bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
if (ioflags & IO_INVIS)
- iflags |= BMV_IF_NO_DMAPI_READ;
+ bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
- error = xfs_getbmap(ip, &bm, (struct getbmap __user *)arg+1, iflags);
+ error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
+ (struct getbmap *)arg+1);
if (error)
return -error;
- if (copy_to_user(arg, &bm, sizeof(bm)))
+ /* copy back header - only size of getbmap */
+ if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
return -XFS_ERROR(EFAULT);
return 0;
}
STATIC int
+xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
+{
+ struct getbmapx __user *base = *ap;
+
+ if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
+ return XFS_ERROR(EFAULT);
+
+ *ap += sizeof(struct getbmapx);
+ return 0;
+}
+
+STATIC int
xfs_ioc_getbmapx(
struct xfs_inode *ip,
void __user *arg)
{
struct getbmapx bmx;
- struct getbmap bm;
- int iflags;
int error;
if (copy_from_user(&bmx, arg, sizeof(bmx)))
@@ -1300,46 +1315,46 @@ xfs_ioc_getbmapx(
if (bmx.bmv_count < 2)
return -XFS_ERROR(EINVAL);
- /*
- * Map input getbmapx structure to a getbmap
- * structure for xfs_getbmap.
- */
- GETBMAP_CONVERT(bmx, bm);
-
- iflags = bmx.bmv_iflags;
-
- if (iflags & (~BMV_IF_VALID))
+ if (bmx.bmv_iflags & (~BMV_IF_VALID))
return -XFS_ERROR(EINVAL);
- iflags |= BMV_IF_EXTENDED;
-
- error = xfs_getbmap(ip, &bm, (struct getbmapx __user *)arg+1, iflags);
+ error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
+ (struct getbmapx *)arg+1);
if (error)
return -error;
- GETBMAP_CONVERT(bm, bmx);
-
- if (copy_to_user(arg, &bmx, sizeof(bmx)))
+ /* copy back header */
+ if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
return -XFS_ERROR(EFAULT);
return 0;
}
-int
-xfs_ioctl(
- xfs_inode_t *ip,
+/*
+ * Note: some of the ioctl's return positive numbers as a
+ * byte count indicating success, such as readlink_by_handle.
+ * So we don't "sign flip" like most other routines. This means
+ * true errors need to be returned as a negative value.
+ */
+long
+xfs_file_ioctl(
struct file *filp,
- int ioflags,
unsigned int cmd,
- void __user *arg)
+ unsigned long p)
{
struct inode *inode = filp->f_path.dentry->d_inode;
- xfs_mount_t *mp = ip->i_mount;
+ struct xfs_inode *ip = XFS_I(inode);
+ struct xfs_mount *mp = ip->i_mount;
+ void __user *arg = (void __user *)p;
+ int ioflags = 0;
int error;
- xfs_itrace_entry(XFS_I(inode));
- switch (cmd) {
+ if (filp->f_mode & FMODE_NOCMTIME)
+ ioflags |= IO_INVIS;
+ xfs_itrace_entry(ip);
+
+ switch (cmd) {
case XFS_IOC_ALLOCSP:
case XFS_IOC_FREESP:
case XFS_IOC_RESVSP:
@@ -1347,17 +1362,13 @@ xfs_ioctl(
case XFS_IOC_ALLOCSP64:
case XFS_IOC_FREESP64:
case XFS_IOC_RESVSP64:
- case XFS_IOC_UNRESVSP64:
- /*
- * Only allow the sys admin to reserve space unless
- * unwritten extents are enabled.
- */
- if (!xfs_sb_version_hasextflgbit(&mp->m_sb) &&
- !capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- return xfs_ioc_space(ip, inode, filp, ioflags, cmd, arg);
+ case XFS_IOC_UNRESVSP64: {
+ xfs_flock64_t bf;
+ if (copy_from_user(&bf, arg, sizeof(bf)))
+ return -XFS_ERROR(EFAULT);
+ return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
+ }
case XFS_IOC_DIOINFO: {
struct dioattr da;
xfs_buftarg_t *target =
@@ -1417,18 +1428,30 @@ xfs_ioctl(
case XFS_IOC_FD_TO_HANDLE:
case XFS_IOC_PATH_TO_HANDLE:
- case XFS_IOC_PATH_TO_FSHANDLE:
- return xfs_find_handle(cmd, arg);
+ case XFS_IOC_PATH_TO_FSHANDLE: {
+ xfs_fsop_handlereq_t hreq;
- case XFS_IOC_OPEN_BY_HANDLE:
- return xfs_open_by_handle(mp, arg, filp, inode);
+ if (copy_from_user(&hreq, arg, sizeof(hreq)))
+ return -XFS_ERROR(EFAULT);
+ return xfs_find_handle(cmd, &hreq);
+ }
+ case XFS_IOC_OPEN_BY_HANDLE: {
+ xfs_fsop_handlereq_t hreq;
+ if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
+ return -XFS_ERROR(EFAULT);
+ return xfs_open_by_handle(mp, &hreq, filp, inode);
+ }
case XFS_IOC_FSSETDM_BY_HANDLE:
return xfs_fssetdm_by_handle(mp, arg, inode);
- case XFS_IOC_READLINK_BY_HANDLE:
- return xfs_readlink_by_handle(mp, arg, inode);
+ case XFS_IOC_READLINK_BY_HANDLE: {
+ xfs_fsop_handlereq_t hreq;
+ if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
+ return -XFS_ERROR(EFAULT);
+ return xfs_readlink_by_handle(mp, &hreq, inode);
+ }
case XFS_IOC_ATTRLIST_BY_HANDLE:
return xfs_attrlist_by_handle(mp, arg, inode);
@@ -1436,7 +1459,11 @@ xfs_ioctl(
return xfs_attrmulti_by_handle(mp, arg, filp, inode);
case XFS_IOC_SWAPEXT: {
- error = xfs_swapext((struct xfs_swapext __user *)arg);
+ struct xfs_swapext sxp;
+
+ if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
+ return -XFS_ERROR(EFAULT);
+ error = xfs_swapext(&sxp);
return -error;
}
@@ -1492,9 +1519,6 @@ xfs_ioctl(
case XFS_IOC_FSGROWFSDATA: {
xfs_growfs_data_t in;
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
if (copy_from_user(&in, arg, sizeof(in)))
return -XFS_ERROR(EFAULT);
@@ -1505,9 +1529,6 @@ xfs_ioctl(
case XFS_IOC_FSGROWFSLOG: {
xfs_growfs_log_t in;
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
if (copy_from_user(&in, arg, sizeof(in)))
return -XFS_ERROR(EFAULT);
@@ -1518,9 +1539,6 @@ xfs_ioctl(
case XFS_IOC_FSGROWFSRT: {
xfs_growfs_rt_t in;
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
if (copy_from_user(&in, arg, sizeof(in)))
return -XFS_ERROR(EFAULT);