diff options
author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2011-05-24 15:10:56 +0530 |
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committer | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2011-09-22 21:38:52 +0530 |
commit | 02cb7f3a256517cbf3136caff2863fbafc57b540 (patch) | |
tree | 1d741e85dfe584b35a4a5e69a086d7b19fafd0ad /hw/9pfs/coxattr.c | |
parent | 70c18fc08bcc9e9bbd8c00ca5e694e07890687e5 (diff) | |
download | hqemu-02cb7f3a256517cbf3136caff2863fbafc57b540.zip hqemu-02cb7f3a256517cbf3136caff2863fbafc57b540.tar.gz |
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 <aneesh.kumar@linux.vnet.ibm.com>
Diffstat (limited to 'hw/9pfs/coxattr.c')
-rw-r--r-- | hw/9pfs/coxattr.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/hw/9pfs/coxattr.c b/hw/9pfs/coxattr.c index a289389..7b93c8f 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; } |