diff options
Diffstat (limited to 'hw/9pfs/cofile.c')
| -rw-r--r-- | hw/9pfs/cofile.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/hw/9pfs/cofile.c b/hw/9pfs/cofile.c index 88791bc327..71174c3e4a 100644 --- a/hw/9pfs/cofile.c +++ b/hw/9pfs/cofile.c @@ -11,10 +11,15 @@ * */ +/* + * Not so fast! You might want to read the 9p developer docs first: + * https://wiki.qemu.org/Documentation/9p + */ + #include "qemu/osdep.h" #include "fsdev/qemu-fsdev.h" #include "qemu/thread.h" -#include "qemu/coroutine.h" +#include "qemu/main-loop.h" #include "coth.h" int coroutine_fn v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t st_mode, @@ -140,10 +145,10 @@ int coroutine_fn v9fs_co_open2(V9fsPDU *pdu, V9fsFidState *fidp, cred.fc_gid = gid; /* * Hold the directory fid lock so that directory path name - * don't change. Read lock is fine because this fid cannot - * be used by any other operation. + * don't change. Take the write lock to be sure this fid + * cannot be used by another operation. */ - v9fs_path_read_lock(s); + v9fs_path_write_lock(s); v9fs_co_run_in_worker( { err = s->ops->open2(&s->ctx, &fidp->path, @@ -247,7 +252,7 @@ int coroutine_fn v9fs_co_pwritev(V9fsPDU *pdu, V9fsFidState *fidp, if (v9fs_request_cancelled(pdu)) { return -EINTR; } - fsdev_co_throttle_request(s->ctx.fst, true, iov, iovcnt); + fsdev_co_throttle_request(s->ctx.fst, THROTTLE_WRITE, iov, iovcnt); v9fs_co_run_in_worker( { err = s->ops->pwritev(&s->ctx, &fidp->fs, iov, iovcnt, offset); @@ -267,7 +272,7 @@ int coroutine_fn v9fs_co_preadv(V9fsPDU *pdu, V9fsFidState *fidp, if (v9fs_request_cancelled(pdu)) { return -EINTR; } - fsdev_co_throttle_request(s->ctx.fst, false, iov, iovcnt); + fsdev_co_throttle_request(s->ctx.fst, THROTTLE_READ, iov, iovcnt); v9fs_co_run_in_worker( { err = s->ops->preadv(&s->ctx, &fidp->fs, iov, iovcnt, offset); |