Author: dchagin
Date: Sun May 24 18:08:01 2015
New Revision: 283492
URL: https://svnweb.freebsd.org/changeset/base/283492
Log:
Implement Linux specific syncfs() system call.
Modified:
head/sys/amd64/linux/linux_dummy.c
head/sys/amd64/linux/syscalls.master
head/sys/amd64/linux32/linux32_dummy.c
head/sys/amd64/linux32/syscalls.master
head/sys/compat/linux/linux_stats.c
head/sys/i386/linux/linux_dummy.c
head/sys/i386/linux/syscalls.master
Modified: head/sys/amd64/linux/linux_dummy.c
==============================================================================
--- head/sys/amd64/linux/linux_dummy.c Sun May 24 18:06:46 2015
(r283491)
+++ head/sys/amd64/linux/linux_dummy.c Sun May 24 18:08:01 2015
(r283492)
@@ -113,7 +113,6 @@ DUMMY(fanotify_mark);
DUMMY(name_to_handle_at);
DUMMY(open_by_handle_at);
DUMMY(clock_adjtime);
-DUMMY(syncfs);
DUMMY(setns);
DUMMY(process_vm_readv);
DUMMY(process_vm_writev);
Modified: head/sys/amd64/linux/syscalls.master
==============================================================================
--- head/sys/amd64/linux/syscalls.master Sun May 24 18:06:46 2015
(r283491)
+++ head/sys/amd64/linux/syscalls.master Sun May 24 18:08:01 2015
(r283492)
@@ -502,7 +502,7 @@
303 AUE_NULL STD { int linux_name_to_handle_at(void); }
304 AUE_NULL STD { int linux_open_by_handle_at(void); }
305 AUE_NULL STD { int linux_clock_adjtime(void); }
-306 AUE_NULL STD { int linux_syncfs(void); }
+306 AUE_SYNC STD { int linux_syncfs(l_int fd); }
307 AUE_NULL STD { int linux_sendmmsg(l_int s,
\
struct l_mmsghdr *msg, l_uint vlen,
\
l_uint flags); }
Modified: head/sys/amd64/linux32/linux32_dummy.c
==============================================================================
--- head/sys/amd64/linux32/linux32_dummy.c Sun May 24 18:06:46 2015
(r283491)
+++ head/sys/amd64/linux32/linux32_dummy.c Sun May 24 18:08:01 2015
(r283492)
@@ -124,7 +124,6 @@ DUMMY(fanotify_mark);
DUMMY(name_to_handle_at);
DUMMY(open_by_handle_at);
DUMMY(clock_adjtime);
-DUMMY(syncfs);
DUMMY(setns);
DUMMY(process_vm_readv);
DUMMY(process_vm_writev);
Modified: head/sys/amd64/linux32/syscalls.master
==============================================================================
--- head/sys/amd64/linux32/syscalls.master Sun May 24 18:06:46 2015
(r283491)
+++ head/sys/amd64/linux32/syscalls.master Sun May 24 18:08:01 2015
(r283492)
@@ -573,7 +573,7 @@
341 AUE_NULL STD { int linux_name_to_handle_at(void); }
342 AUE_NULL STD { int linux_open_by_handle_at(void); }
343 AUE_NULL STD { int linux_clock_adjtime(void); }
-344 AUE_NULL STD { int linux_syncfs(void); }
+344 AUE_SYNC STD { int linux_syncfs(l_int fd); }
345 AUE_NULL STD { int linux_sendmmsg(l_int s,
\
struct l_mmsghdr *msg, l_uint vlen,
\
l_uint flags); }
Modified: head/sys/compat/linux/linux_stats.c
==============================================================================
--- head/sys/compat/linux/linux_stats.c Sun May 24 18:06:46 2015
(r283491)
+++ head/sys/compat/linux/linux_stats.c Sun May 24 18:08:01 2015
(r283492)
@@ -32,6 +32,7 @@ __FBSDID("$FreeBSD$");
#include "opt_compat.h"
#include <sys/param.h>
+#include <sys/capsicum.h>
#include <sys/dirent.h>
#include <sys/file.h>
#include <sys/filedesc.h>
@@ -653,3 +654,43 @@ linux_newfstatat(struct thread *td, stru
}
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
+
+int
+linux_syncfs(struct thread *td, struct linux_syncfs_args *args)
+{
+ cap_rights_t rights;
+ struct mount *mp;
+ struct vnode *vp;
+ int error, save;
+
+ error = fgetvp(td, args->fd, cap_rights_init(&rights, CAP_FSYNC), &vp);
+ if (error != 0)
+ /*
+ * Linux syncfs() returns only EBADF, however fgetvp()
+ * can return EINVAL in case of file descriptor does
+ * not represent a vnode. XXX.
+ */
+ return (error);
+
+ mp = vp->v_mount;
+ mtx_lock(&mountlist_mtx);
+ error = vfs_busy(mp, MBF_MNTLSTLOCK);
+ if (error != 0) {
+ /* See comment above. */
+ mtx_unlock(&mountlist_mtx);
+ goto out;
+ }
+ if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
+ vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
+ save = curthread_pflags_set(TDP_SYNCIO);
+ vfs_msync(mp, MNT_NOWAIT);
+ VFS_SYNC(mp, MNT_NOWAIT);
+ curthread_pflags_restore(save);
+ vn_finished_write(mp);
+ }
+ vfs_unbusy(mp);
+
+ out:
+ vrele(vp);
+ return (error);
+}
Modified: head/sys/i386/linux/linux_dummy.c
==============================================================================
--- head/sys/i386/linux/linux_dummy.c Sun May 24 18:06:46 2015
(r283491)
+++ head/sys/i386/linux/linux_dummy.c Sun May 24 18:08:01 2015
(r283492)
@@ -120,7 +120,6 @@ DUMMY(fanotify_mark);
DUMMY(name_to_handle_at);
DUMMY(open_by_handle_at);
DUMMY(clock_adjtime);
-DUMMY(syncfs);
DUMMY(setns);
DUMMY(process_vm_readv);
DUMMY(process_vm_writev);
Modified: head/sys/i386/linux/syscalls.master
==============================================================================
--- head/sys/i386/linux/syscalls.master Sun May 24 18:06:46 2015
(r283491)
+++ head/sys/i386/linux/syscalls.master Sun May 24 18:08:01 2015
(r283492)
@@ -581,7 +581,7 @@
341 AUE_NULL STD { int linux_name_to_handle_at(void); }
342 AUE_NULL STD { int linux_open_by_handle_at(void); }
343 AUE_NULL STD { int linux_clock_adjtime(void); }
-344 AUE_NULL STD { int linux_syncfs(void); }
+344 AUE_SYNC STD { int linux_syncfs(l_int fd); }
345 AUE_NULL STD { int linux_sendmmsg(l_int s,
\
struct l_mmsghdr *msg, l_uint vlen,
\
l_uint flags); }
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