357e2f7f4e
The idea is to send a victim request that will possibly block in the server and to send a flush request to cancel the victim request. This patch adds two test to verifiy that: - the server does not reply to a victim request that was actually cancelled - the server replies to the flush request after replying to the victim request if it could not cancel it 9p request cancellation reference: http://man.cat-v.org/plan_9/5/flush Signed-off-by: Greg Kurz <groug@kaod.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> (groug, change the test to only write a single byte to avoid any alignment or endianess consideration)
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/*
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* 9p
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_9P_SYNTH_H
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#define QEMU_9P_SYNTH_H
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typedef struct V9fsSynthNode V9fsSynthNode;
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typedef ssize_t (*v9fs_synth_read)(void *buf, int len, off_t offset,
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void *arg);
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typedef ssize_t (*v9fs_synth_write)(void *buf, int len, off_t offset,
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void *arg);
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typedef struct V9fsSynthNodeAttr {
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int mode;
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int inode;
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int nlink;
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v9fs_synth_read read;
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v9fs_synth_write write;
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} V9fsSynthNodeAttr;
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struct V9fsSynthNode {
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QLIST_HEAD(, V9fsSynthNode) child;
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QLIST_ENTRY(V9fsSynthNode) sibling;
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char name[NAME_MAX];
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V9fsSynthNodeAttr *attr;
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V9fsSynthNodeAttr actual_attr;
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void *private;
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int open_count;
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};
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typedef struct V9fsSynthOpenState {
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off_t offset;
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V9fsSynthNode *node;
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struct dirent dent;
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} V9fsSynthOpenState;
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int qemu_v9fs_synth_mkdir(V9fsSynthNode *parent, int mode,
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const char *name, V9fsSynthNode **result);
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int qemu_v9fs_synth_add_file(V9fsSynthNode *parent, int mode,
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const char *name, v9fs_synth_read read,
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v9fs_synth_write write, void *arg);
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/* qtest stuff */
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#define QTEST_V9FS_SYNTH_WALK_FILE "WALK%d"
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#define QTEST_V9FS_SYNTH_LOPEN_FILE "LOPEN"
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#define QTEST_V9FS_SYNTH_WRITE_FILE "WRITE"
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/* Any write to the "FLUSH" file is handled one byte at a time by the
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* backend. If the byte is zero, the backend returns success (ie, 1),
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* otherwise it forces the server to try again forever. Thus allowing
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* the client to cancel the request.
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*/
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#define QTEST_V9FS_SYNTH_FLUSH_FILE "FLUSH"
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#endif
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