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authorJeremy Allison <jra@samba.org>2001-09-06 22:43:21 +0000
committerJeremy Allison <jra@samba.org>2001-09-06 22:43:21 +0000
commitce9f95996498f7795aaef069e1443ea1c7d524b3 (patch)
tree50d18cea47214f08e90f7bb453b000d383265736 /source/locking/posix.c
parentc26e0d3f27a05ecc8bd2390f9aab7f9451524e47 (diff)
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Fix the 62bit locking onto 32 bit NFS mounts problem generically for HPUX.
Don. please check this out. Jeremy.
Diffstat (limited to 'source/locking/posix.c')
-rw-r--r--source/locking/posix.c115
1 files changed, 21 insertions, 94 deletions
diff --git a/source/locking/posix.c b/source/locking/posix.c
index b2ffbeda8ff..eb5e4b6460c 100644
--- a/source/locking/posix.c
+++ b/source/locking/posix.c
@@ -650,38 +650,6 @@ static BOOL posix_lock_in_range(SMB_OFF_T *offset_out, SMB_OFF_T *count_out,
}
/****************************************************************************
- Pathetically try and map a 64 bit lock offset into 31 bits. I hate Windows :-).
-****************************************************************************/
-
-uint32 map_lock_offset(uint32 high, uint32 low)
-{
- unsigned int i;
- uint32 mask = 0;
- uint32 highcopy = high;
-
- /*
- * Try and find out how many significant bits there are in high.
- */
-
- for(i = 0; highcopy; i++)
- highcopy >>= 1;
-
- /*
- * We use 31 bits not 32 here as POSIX
- * lock offsets may not be negative.
- */
-
- mask = (~0) << (31 - i);
-
- if(low & mask)
- return 0; /* Fail. */
-
- high <<= (31 - i);
-
- return (high|low);
-}
-
-/****************************************************************************
Actual function that does POSIX locks. Copes with 64 -> 32 bit cruft and
broken NFS implementations.
****************************************************************************/
@@ -691,80 +659,39 @@ static BOOL posix_fcntl_lock(files_struct *fsp, int op, SMB_OFF_T offset, SMB_OF
int ret;
struct connection_struct *conn = fsp->conn;
-#if defined(LARGE_SMB_OFF_T)
- /*
- * In the 64 bit locking case we store the original
- * values in case we have to map to a 32 bit lock on
- * a filesystem that doesn't support 64 bit locks.
- */
- SMB_OFF_T orig_offset = offset;
- SMB_OFF_T orig_count = count;
-#endif /* LARGE_SMB_OFF_T */
-
DEBUG(8,("posix_fcntl_lock %d %d %.0f %.0f %d\n",fsp->fd,op,(double)offset,(double)count,type));
ret = conn->vfs_ops.lock(fsp,fsp->fd,op,offset,count,type);
- if (!ret && ((errno == EFBIG) || (errno == ENOLCK))) {
- if( DEBUGLVL( 0 )) {
- dbgtext("posix_fcntl_lock: WARNING: lock request at offset %.0f, length %.0f returned\n", (double)offset,(double)count);
- dbgtext("an %s error. This can happen when using 64 bit lock offsets\n", strerror(errno));
- dbgtext("on 32 bit NFS mounted file systems. Retrying with 32 bit truncated length.\n");
- }
- /* 32 bit NFS file system, retry with smaller offset */
- errno = 0;
- count &= 0x7fffffff;
- ret = conn->vfs_ops.lock(fsp,fsp->fd,op,offset,count,type);
- }
+ if (!ret && ((errno == EFBIG) || (errno == ENOLCK) || (errno == EINVAL))) {
- /* A lock query - just return. */
- if (op == SMB_F_GETLK)
- return ret;
+ DEBUG(0,("posix_fcntl_lock: WARNING: lock request at offset %.0f, length %.0f returned\n",
+ (double)offset,(double)count));
+ DEBUG(0,("an %s error. This can happen when using 64 bit lock offsets\n", strerror(errno)));
+ DEBUG(0,("on 32 bit NFS mounted file systems.\n"));
- /* A lock set or unset. */
- if (!ret) {
- DEBUG(3,("posix_fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
- (double)offset,(double)count,op,type,strerror(errno)));
+ /*
+ * If the offset is > 0x7FFFFFFF then this will cause problems on
+ * 32 bit NFS mounted filesystems. Just ignore it.
+ */
- /* Perhaps it doesn't support this sort of locking ? */
- if (errno == EINVAL) {
-#if defined(LARGE_SMB_OFF_T)
- {
- /*
- * Ok - if we get here then we have a 64 bit lock request
- * that has returned EINVAL. Try and map to 31 bits for offset
- * and length and try again. This may happen if a filesystem
- * doesn't support 64 bit offsets (efs/ufs) although the underlying
- * OS does.
- */
- uint32 off_low = (orig_offset & 0xFFFFFFFF);
- uint32 off_high = ((orig_offset >> 32) & 0xFFFFFFFF);
-
- count = (orig_count & 0x7FFFFFFF);
- offset = (SMB_OFF_T)map_lock_offset(off_high, off_low);
- ret = conn->vfs_ops.lock(fsp,fsp->fd,op,offset,count,type);
- if (!ret) {
- if (errno == EINVAL) {
- DEBUG(3,("posix_fcntl_lock: locking not supported? returning True\n"));
- return(True);
- }
- return False;
- }
- DEBUG(3,("posix_fcntl_lock: 64 -> 32 bit modified lock call successful\n"));
- return True;
- }
-#else /* LARGE_SMB_OFF_T */
- DEBUG(3,("locking not supported? returning True\n"));
- return(True);
-#endif /* LARGE_SMB_OFF_T */
+ if (offset & ~((SMB_OFF_T)0x7fffffff)) {
+ DEBUG(0,("Offset greater than 31 bits. Returning success.\n"));
+ return True;
}
- return(False);
+ if (count & ~((SMB_OFF_T)0x7fffffff)) {
+ /* 32 bit NFS file system, retry with smaller offset */
+ DEBUG(0,("Count greater than 31 bits - retrying with 31 bit truncated length.\n"));
+ errno = 0;
+ count &= 0x7fffffff;
+ ret = conn->vfs_ops.lock(fsp,fsp->fd,op,offset,count,type);
+ }
}
- DEBUG(8,("posix_fcntl_lock: Lock call successful\n"));
+ DEBUG(8,("posix_fcntl_lock: Lock call %s\n", ret ? "successful" : "failed"));
- return(True);
+ return ret;
}
/****************************************************************************