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Elite Member
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鵝後來找到 Subject: Re: ports/29704: Imagemagick Identify utility crashes when used on smbfs mounted share....
引用:
Yes, this is an expected behavior - smbfs uses a counter to track open/close operations and if it became zero, an SMB "close" request sent to server. Obviously, mmap() doesn't give additional VOP_OPEN() call and file is really closed after close(), so any subsequent read/write operation will fail.
In the DOS/Windows world it is normal to have strong relation between open/close operations, while VOP_OPEN()/VOP_CLOSE() in FreeBSD do not match sometime (I'm suspect that it is possible to remove inconsistence, though).
One of the possible solutions is to remove smb_close request from smbfs_close() vop and leave it only in the smbfs_inactive(), but this will not allow programs to immediately release a file by just closing it.
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看來是FreeBSD對VOP_OPEN/VOP_CLOSE的解釋造成的,難怪從十幾年前就是這樣了  .... |