Messages in this thread Patch in this message |  | | | Subject | Re: [RFC] File backed target for device-mapper | | From | Christophe Saout <> | | Date | 22 Jul 2003 23:39:09 +0200 |
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Am Di, 2003-07-22 um 23.17 schrieb Christophe Saout:
> I just wrote a dm target uses a file as backend instead of another block > device. > > It's heavily based on the linux 2.5 loop device (so it uses the inode > operation sendfile for read operations and the address space operations > prepare_write and commit_write for write operations).
Umm... lalala... (a cleanup and a *fix*) :D
--- dm-file.c.orig 2003-07-22 23:36:57.639746368 +0200 +++ dm-file.c 2003-07-22 23:37:26.203404032 +0200 @@ -87,17 +87,16 @@ { char *src; char *dst = (char *)desc->buf; - unsigned long count = desc->count; - if (size > count) - size = count; + if (size > desc->count) + size = desc->count; src = kmap(page) + offset; if (src != dst) /* FIXME: is src == dst possible? */ memcpy(dst, src, size); kunmap(page); - desc->count = count - size; + desc->count -= size; desc->written += size; (char *)desc->buf += size; @@ -127,8 +126,6 @@ if (r < 0) break; - - pos += bv->bv_len; } return 0;
-- Christophe Saout <christophe@saout.de> Please avoid sending me Word or PowerPoint attachments. See http://www.fsf.org/philosophy/no-word-attachments.html
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