diff options
Diffstat (limited to 'source3/locking')
| -rw-r--r-- | source3/locking/posix.c | 115 |
1 files changed, 21 insertions, 94 deletions
diff --git a/source3/locking/posix.c b/source3/locking/posix.c index b2ffbeda8f..eb5e4b6460 100644 --- a/source3/locking/posix.c +++ b/source3/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; } /**************************************************************************** |