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Juergen Gross
7c0d5f3cac
Add the open request of the 9pfs protocol. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Reviewed-by: Jason Andryuk <jandryuk@gmail.com>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef XEN_9PFSD_H
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#define XEN_9PFSD_H
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#include <pthread.h>
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#include <stdbool.h>
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#include <xenevtchn.h>
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#include <xen_list.h>
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#include <xen/xen.h>
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#include <xen/io/xenbus.h>
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#include <xen/io/9pfs.h>
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#define MAX_RINGS 4
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#define MAX_RING_ORDER 9
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#define MAX_OPEN_FILES_DEFAULT 5
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struct p9_header {
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uint32_t size;
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uint8_t cmd;
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uint16_t tag;
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} __attribute__((packed));
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struct p9_fid {
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XEN_TAILQ_ENTRY(struct p9_fid) list;
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unsigned int fid;
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unsigned int ref;
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int fd;
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uint8_t mode;
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bool opened;
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bool isdir;
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void *data; /* File type specific. */
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char path[];
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};
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typedef struct device device;
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struct ring {
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device *device;
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pthread_t thread;
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bool thread_active;
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bool stop_thread;
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pthread_cond_t cond;
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pthread_mutex_t mutex;
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evtchn_port_t evtchn;
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struct xen_9pfs_data_intf *intf;
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unsigned int ring_order;
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RING_IDX ring_size;
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/* Transport layer data. */
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struct xen_9pfs_data data;
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RING_IDX prod_pvt_in;
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RING_IDX cons_pvt_out;
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/* Request and response handling. */
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uint32_t max_size;
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bool error; /* Protocol error - stop processing. */
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bool handle_response; /* Main loop now handling response. */
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void *buffer; /* Request/response buffer. */
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char *str; /* String work space. */
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unsigned int str_size; /* Size of *str. */
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unsigned int str_used; /* Currently used size of *str. */
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};
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struct device {
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/* Admin data. */
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XEN_TAILQ_ENTRY(device) list;
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unsigned int last_seen; /* Set in scan_backend(). */
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unsigned int domid;
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unsigned int devid;
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/* Tool side configuration data. */
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char *host_path;
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unsigned int max_space;
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unsigned int max_files;
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unsigned int max_open_files;
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bool auto_delete;
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/* Connection data. */
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enum xenbus_state backend_state;
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enum xenbus_state frontend_state;
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unsigned int num_rings;
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struct ring *ring[MAX_RINGS];
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int root_fd;
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/* File system handling. */
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pthread_mutex_t fid_mutex;
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XEN_TAILQ_HEAD(fidhead, struct p9_fid) fids;
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struct p9_fid *root_fid;
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unsigned int n_fids;
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};
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extern xenevtchn_handle *xe;
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void *io_thread(void *arg);
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void free_fids(device *device);
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#endif /* XEN_9PFSD_H */
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