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Diffstat (limited to 'usr/src/uts/common/syscall/fcntl.c')
-rw-r--r--usr/src/uts/common/syscall/fcntl.c137
1 files changed, 126 insertions, 11 deletions
diff --git a/usr/src/uts/common/syscall/fcntl.c b/usr/src/uts/common/syscall/fcntl.c
index 7421957235..d631fe62f6 100644
--- a/usr/src/uts/common/syscall/fcntl.c
+++ b/usr/src/uts/common/syscall/fcntl.c
@@ -22,6 +22,7 @@
/*
* Copyright (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013, OmniTI Computer Consulting, Inc. All rights reserved.
+ * Copyright 2015, Joyent, Inc.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
@@ -53,7 +54,8 @@
#include <sys/cmn_err.h>
-static int flock_check(vnode_t *, flock64_t *, offset_t, offset_t);
+/* This is global so that it can be used by brand emulation. */
+int flock_check(vnode_t *, flock64_t *, offset_t, offset_t);
static int flock_get_start(vnode_t *, flock64_t *, offset_t, u_offset_t *);
static void fd_too_big(proc_t *);
@@ -271,11 +273,12 @@ fcntl(int fdes, int cmd, intptr_t arg)
* The file system and vnode layers understand and implement
* locking with flock64 structures. So here once we pass through
* the test for compatibility as defined by LFS API, (for F_SETLK,
- * F_SETLKW, F_GETLK, F_GETLKW, F_FREESP) we transform
- * the flock structure to a flock64 structure and send it to the
- * lower layers. Similarly in case of GETLK the returned flock64
- * structure is transformed to a flock structure if everything fits
- * in nicely, otherwise we return EOVERFLOW.
+ * F_SETLKW, F_GETLK, F_GETLKW, F_OFD_GETLK, F_OFD_SETLK, F_OFD_SETLKW,
+ * F_FREESP) we transform the flock structure to a flock64 structure
+ * and send it to the lower layers. Similarly in case of GETLK and
+ * OFD_GETLK the returned flock64 structure is transformed to a flock
+ * structure if everything fits in nicely, otherwise we return
+ * EOVERFLOW.
*/
case F_GETLK:
@@ -283,6 +286,11 @@ fcntl(int fdes, int cmd, intptr_t arg)
case F_SETLK:
case F_SETLKW:
case F_SETLK_NBMAND:
+ case F_OFD_GETLK:
+ case F_OFD_SETLK:
+ case F_OFD_SETLKW:
+ case F_FLOCK:
+ case F_FLOCKW:
/*
* Copy in input fields only.
@@ -345,20 +353,65 @@ fcntl(int fdes, int cmd, intptr_t arg)
if ((error = flock_check(vp, &bf, offset, maxoffset)) != 0)
break;
+ if (cmd == F_FLOCK || cmd == F_FLOCKW) {
+ /* FLOCK* locking is always over the entire file. */
+ if (bf.l_whence != 0 || bf.l_start != 0 ||
+ bf.l_len != 0) {
+ error = EINVAL;
+ break;
+ }
+ if (bf.l_type < F_RDLCK || bf.l_type > F_UNLCK) {
+ error = EINVAL;
+ break;
+ }
+ }
+
+ if (cmd == F_OFD_SETLK || cmd == F_OFD_SETLKW) {
+ /*
+ * TBD OFD-style locking is currently limited to
+ * covering the entire file.
+ */
+ if (bf.l_whence != 0 || bf.l_start != 0 ||
+ bf.l_len != 0) {
+ error = EINVAL;
+ break;
+ }
+ }
+
/*
* Not all of the filesystems understand F_O_GETLK, and
* there's no need for them to know. Map it to F_GETLK.
+ *
+ * The *_frlock functions in the various file systems basically
+ * do some validation and then funnel everything through the
+ * fs_frlock function. For OFD-style locks fs_frlock will do
+ * nothing so that once control returns here we can call the
+ * ofdlock function with the correct fp. For OFD-style locks
+ * the unsupported remote file systems, such as NFS, detect and
+ * reject the OFD-style cmd argument.
*/
if ((error = VOP_FRLOCK(vp, (cmd == F_O_GETLK) ? F_GETLK : cmd,
&bf, flag, offset, NULL, fp->f_cred, NULL)) != 0)
break;
+ if (cmd == F_FLOCK || cmd == F_FLOCKW || cmd == F_OFD_GETLK ||
+ cmd == F_OFD_SETLK || cmd == F_OFD_SETLKW) {
+ /*
+ * This is an OFD-style lock so we need to handle it
+ * here. Because OFD-style locks are associated with
+ * the file_t we didn't have enough info down the
+ * VOP_FRLOCK path immediately above.
+ */
+ if ((error = ofdlock(fp, cmd, &bf, flag, offset)) != 0)
+ break;
+ }
+
/*
* If command is GETLK and no lock is found, only
* the type field is changed.
*/
- if ((cmd == F_O_GETLK || cmd == F_GETLK) &&
- bf.l_type == F_UNLCK) {
+ if ((cmd == F_O_GETLK || cmd == F_GETLK ||
+ cmd == F_OFD_GETLK) && bf.l_type == F_UNLCK) {
/* l_type always first entry, always a short */
if (copyout(&bf.l_type, &((struct flock *)arg)->l_type,
sizeof (bf.l_type)))
@@ -387,7 +440,7 @@ fcntl(int fdes, int cmd, intptr_t arg)
obf.l_pid = (int16_t)bf.l_pid;
if (copyout(&obf, (void *)arg, sizeof (obf)))
error = EFAULT;
- } else if (cmd == F_GETLK) {
+ } else if (cmd == F_GETLK || cmd == F_OFD_GETLK) {
/*
* Copy out SVR4 flock.
*/
@@ -591,6 +644,11 @@ fcntl(int fdes, int cmd, intptr_t arg)
case F_SETLK64:
case F_SETLKW64:
case F_SETLK64_NBMAND:
+ case F_OFD_GETLK64:
+ case F_OFD_SETLK64:
+ case F_OFD_SETLKW64:
+ case F_FLOCK64:
+ case F_FLOCKW64:
/*
* Large Files: Here we set cmd as *LK and send it to
* lower layers. *LK64 is only for the user land.
@@ -611,6 +669,16 @@ fcntl(int fdes, int cmd, intptr_t arg)
cmd = F_SETLKW;
else if (cmd == F_SETLK64_NBMAND)
cmd = F_SETLK_NBMAND;
+ else if (cmd == F_OFD_GETLK64)
+ cmd = F_OFD_GETLK;
+ else if (cmd == F_OFD_SETLK64)
+ cmd = F_OFD_SETLK;
+ else if (cmd == F_OFD_SETLKW64)
+ cmd = F_OFD_SETLKW;
+ else if (cmd == F_FLOCK64)
+ cmd = F_FLOCK;
+ else if (cmd == F_FLOCKW64)
+ cmd = F_FLOCKW;
/*
* Note that the size of flock64 is different in the ILP32
@@ -636,18 +704,65 @@ fcntl(int fdes, int cmd, intptr_t arg)
if ((error = flock_check(vp, &bf, offset, MAXOFFSET_T)) != 0)
break;
+ if (cmd == F_FLOCK || cmd == F_FLOCKW) {
+ /* FLOCK* locking is always over the entire file. */
+ if (bf.l_whence != 0 || bf.l_start != 0 ||
+ bf.l_len != 0) {
+ error = EINVAL;
+ break;
+ }
+ if (bf.l_type < F_RDLCK || bf.l_type > F_UNLCK) {
+ error = EINVAL;
+ break;
+ }
+ }
+
+ if (cmd == F_OFD_SETLK || cmd == F_OFD_SETLKW) {
+ /*
+ * TBD OFD-style locking is currently limited to
+ * covering the entire file.
+ */
+ if (bf.l_whence != 0 || bf.l_start != 0 ||
+ bf.l_len != 0) {
+ error = EINVAL;
+ break;
+ }
+ }
+
+ /*
+ * The *_frlock functions in the various file systems basically
+ * do some validation and then funnel everything through the
+ * fs_frlock function. For OFD-style locks fs_frlock will do
+ * nothing so that once control returns here we can call the
+ * ofdlock function with the correct fp. For OFD-style locks
+ * the unsupported remote file systems, such as NFS, detect and
+ * reject the OFD-style cmd argument.
+ */
if ((error = VOP_FRLOCK(vp, cmd, &bf, flag, offset,
NULL, fp->f_cred, NULL)) != 0)
break;
- if ((cmd == F_GETLK) && bf.l_type == F_UNLCK) {
+ if (cmd == F_FLOCK || cmd == F_FLOCKW || cmd == F_OFD_GETLK ||
+ cmd == F_OFD_SETLK || cmd == F_OFD_SETLKW) {
+ /*
+ * This is an OFD-style lock so we need to handle it
+ * here. Because OFD-style locks are associated with
+ * the file_t we didn't have enough info down the
+ * VOP_FRLOCK path immediately above.
+ */
+ if ((error = ofdlock(fp, cmd, &bf, flag, offset)) != 0)
+ break;
+ }
+
+ if ((cmd == F_GETLK || cmd == F_OFD_GETLK) &&
+ bf.l_type == F_UNLCK) {
if (copyout(&bf.l_type, &((struct flock *)arg)->l_type,
sizeof (bf.l_type)))
error = EFAULT;
break;
}
- if (cmd == F_GETLK) {
+ if (cmd == F_GETLK || cmd == F_OFD_GETLK) {
int i;
/*
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-31 02:33:49 +0000