[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 10/29] tools/xenlogd: add 9pfs clunk request support
Add the clunk request of the 9pfs protocol. Signed-off-by: Juergen Gross <jgross@xxxxxxxx> --- tools/xen-9pfsd/io.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/tools/xen-9pfsd/io.c b/tools/xen-9pfsd/io.c index bb9c78a1f5..c182ef0483 100644 --- a/tools/xen-9pfsd/io.c +++ b/tools/xen-9pfsd/io.c @@ -31,6 +31,7 @@ #define P9_CMD_ERROR 107 #define P9_CMD_WALK 110 #define P9_CMD_OPEN 112 +#define P9_CMD_CLUNK 120 /* P9 protocol open flags. */ #define P9_OREAD 0 /* read */ @@ -943,6 +944,43 @@ static void p9_open(struct ring *ring, struct p9_header *hdr) fill_buffer(ring, hdr->cmd + 1, hdr->tag, "QU", &qid, &iounit); } +static void p9_clunk(struct ring *ring, struct p9_header *hdr) +{ + device *device = ring->device; + uint32_t fid; + struct p9_fid *fidp; + int ret; + + ret = fill_data(ring, "U", &fid); + if ( ret != 1 ) + { + p9_error(ring, hdr->tag, EINVAL); + return; + } + + fidp = get_fid_ref(device, fid); + if ( !fidp ) + { + p9_error(ring, hdr->tag, ENOENT); + return; + } + + if ( fidp->opened ) + { + fidp->opened = false; + free_fid(device, fidp); + close(fidp->fd); + if ( fidp->mode & P9_OREMOVE ) + unlink(fidp->path); + } + + /* 2 calls of free_fid(): one for our reference, and one to free it. */ + free_fid(device, fidp); + free_fid(device, fidp); + + fill_buffer(ring, hdr->cmd + 1, hdr->tag, ""); +} + void *io_thread(void *arg) { struct ring *ring = arg; @@ -1014,6 +1052,10 @@ void *io_thread(void *arg) p9_open(ring, &hdr); break; + case P9_CMD_CLUNK: + p9_clunk(ring, &hdr); + break; + default: syslog(LOG_DEBUG, "%u.%u sent unhandled command %u\n", ring->device->domid, ring->device->devid, hdr.cmd); -- 2.35.3
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