From 02cb7f3a256517cbf3136caff2863fbafc57b540 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Tue, 24 May 2011 15:10:56 +0530 Subject: hw/9pfs: Use read-write lock for protecting fid path. On rename we take the write lock and this ensure path doesn't change as we operate on them. Signed-off-by: Aneesh Kumar K.V --- hw/9pfs/coxattr.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'hw/9pfs/coxattr.c') diff --git a/hw/9pfs/coxattr.c b/hw/9pfs/coxattr.c index a289389e49..7b93c8f478 100644 --- a/hw/9pfs/coxattr.c +++ b/hw/9pfs/coxattr.c @@ -21,6 +21,7 @@ int v9fs_co_llistxattr(V9fsState *s, V9fsString *path, void *value, size_t size) { int err; + qemu_co_rwlock_rdlock(&s->rename_lock); v9fs_co_run_in_worker( { err = s->ops->llistxattr(&s->ctx, path->data, value, size); @@ -28,6 +29,7 @@ int v9fs_co_llistxattr(V9fsState *s, V9fsString *path, void *value, size_t size) err = -errno; } }); + qemu_co_rwlock_unlock(&s->rename_lock); return err; } @@ -37,6 +39,7 @@ int v9fs_co_lgetxattr(V9fsState *s, V9fsString *path, { int err; + qemu_co_rwlock_rdlock(&s->rename_lock); v9fs_co_run_in_worker( { err = s->ops->lgetxattr(&s->ctx, path->data, @@ -46,6 +49,7 @@ int v9fs_co_lgetxattr(V9fsState *s, V9fsString *path, err = -errno; } }); + qemu_co_rwlock_unlock(&s->rename_lock); return err; } @@ -55,6 +59,7 @@ int v9fs_co_lsetxattr(V9fsState *s, V9fsString *path, { int err; + qemu_co_rwlock_rdlock(&s->rename_lock); v9fs_co_run_in_worker( { err = s->ops->lsetxattr(&s->ctx, path->data, @@ -64,6 +69,7 @@ int v9fs_co_lsetxattr(V9fsState *s, V9fsString *path, err = -errno; } }); + qemu_co_rwlock_unlock(&s->rename_lock); return err; } @@ -72,6 +78,7 @@ int v9fs_co_lremovexattr(V9fsState *s, V9fsString *path, { int err; + qemu_co_rwlock_rdlock(&s->rename_lock); v9fs_co_run_in_worker( { err = s->ops->lremovexattr(&s->ctx, path->data, @@ -80,5 +87,6 @@ int v9fs_co_lremovexattr(V9fsState *s, V9fsString *path, err = -errno; } }); + qemu_co_rwlock_unlock(&s->rename_lock); return err; } -- cgit v1.2.3