4 * Copyright IBM, Corp. 2011
7 * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
14 #include "qemu/osdep.h"
15 #include "fsdev/qemu-fsdev.h"
16 #include "qemu/thread.h"
17 #include "qemu/coroutine.h"
20 int v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t st_mode,
24 V9fsState *s = pdu->s;
26 if (v9fs_request_cancelled(pdu)) {
29 if (s->ctx.exops.get_st_gen) {
30 v9fs_path_read_lock(s);
31 v9fs_co_run_in_worker(
33 err = s->ctx.exops.get_st_gen(&s->ctx, path, st_mode,
44 int v9fs_co_lstat(V9fsPDU *pdu, V9fsPath *path, struct stat *stbuf)
47 V9fsState *s = pdu->s;
49 if (v9fs_request_cancelled(pdu)) {
52 v9fs_path_read_lock(s);
53 v9fs_co_run_in_worker(
55 err = s->ops->lstat(&s->ctx, path, stbuf);
64 int v9fs_co_fstat(V9fsPDU *pdu, V9fsFidState *fidp, struct stat *stbuf)
67 V9fsState *s = pdu->s;
69 if (v9fs_request_cancelled(pdu)) {
72 v9fs_co_run_in_worker(
74 err = s->ops->fstat(&s->ctx, fidp->fid_type, &fidp->fs, stbuf);
80 * Some FS driver (local:mapped-file) can't support fetching attributes
81 * using file descriptor. Use Path name in that case.
83 if (err == -EOPNOTSUPP) {
84 err = v9fs_co_lstat(pdu, &fidp->path, stbuf);
87 * fstat on an unlinked file. Work with partial results
88 * returned from s->ops->fstat
96 int v9fs_co_open(V9fsPDU *pdu, V9fsFidState *fidp, int flags)
99 V9fsState *s = pdu->s;
101 if (v9fs_request_cancelled(pdu)) {
104 v9fs_path_read_lock(s);
105 v9fs_co_run_in_worker(
107 err = s->ops->open(&s->ctx, &fidp->path, flags, &fidp->fs);
117 if (total_open_fd > open_fd_hw) {
118 v9fs_reclaim_fd(pdu);
124 int v9fs_co_open2(V9fsPDU *pdu, V9fsFidState *fidp, V9fsString *name, gid_t gid,
125 int flags, int mode, struct stat *stbuf)
130 V9fsState *s = pdu->s;
132 if (v9fs_request_cancelled(pdu)) {
136 cred.fc_mode = mode & 07777;
137 cred.fc_uid = fidp->uid;
140 * Hold the directory fid lock so that directory path name
141 * don't change. Read lock is fine because this fid cannot
142 * be used by any other operation.
144 v9fs_path_read_lock(s);
145 v9fs_co_run_in_worker(
147 err = s->ops->open2(&s->ctx, &fidp->path,
148 name->data, flags, &cred, &fidp->fs);
152 v9fs_path_init(&path);
153 err = v9fs_name_to_path(s, &fidp->path, name->data, &path);
155 err = s->ops->lstat(&s->ctx, &path, stbuf);
158 s->ops->close(&s->ctx, &fidp->fs);
160 v9fs_path_copy(&fidp->path, &path);
163 s->ops->close(&s->ctx, &fidp->fs);
165 v9fs_path_free(&path);
171 if (total_open_fd > open_fd_hw) {
172 v9fs_reclaim_fd(pdu);
178 int v9fs_co_close(V9fsPDU *pdu, V9fsFidOpenState *fs)
181 V9fsState *s = pdu->s;
183 if (v9fs_request_cancelled(pdu)) {
186 v9fs_co_run_in_worker(
188 err = s->ops->close(&s->ctx, fs);
199 int v9fs_co_fsync(V9fsPDU *pdu, V9fsFidState *fidp, int datasync)
202 V9fsState *s = pdu->s;
204 if (v9fs_request_cancelled(pdu)) {
207 v9fs_co_run_in_worker(
209 err = s->ops->fsync(&s->ctx, fidp->fid_type, &fidp->fs, datasync);
217 int v9fs_co_link(V9fsPDU *pdu, V9fsFidState *oldfid,
218 V9fsFidState *newdirfid, V9fsString *name)
221 V9fsState *s = pdu->s;
223 if (v9fs_request_cancelled(pdu)) {
226 v9fs_path_read_lock(s);
227 v9fs_co_run_in_worker(
229 err = s->ops->link(&s->ctx, &oldfid->path,
230 &newdirfid->path, name->data);
239 int v9fs_co_pwritev(V9fsPDU *pdu, V9fsFidState *fidp,
240 struct iovec *iov, int iovcnt, int64_t offset)
243 V9fsState *s = pdu->s;
245 if (v9fs_request_cancelled(pdu)) {
248 v9fs_co_run_in_worker(
250 err = s->ops->pwritev(&s->ctx, &fidp->fs, iov, iovcnt, offset);
258 int v9fs_co_preadv(V9fsPDU *pdu, V9fsFidState *fidp,
259 struct iovec *iov, int iovcnt, int64_t offset)
262 V9fsState *s = pdu->s;
264 if (v9fs_request_cancelled(pdu)) {
267 v9fs_co_run_in_worker(
269 err = s->ops->preadv(&s->ctx, &fidp->fs, iov, iovcnt, offset);