1 /* 2 * 9p backend 3 * 4 * Copyright IBM, Corp. 2011 5 * 6 * Authors: 7 * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 */ 13 14 /* 15 * Not so fast! You might want to read the 9p developer docs first: 16 * https://wiki.qemu.org/Documentation/9p 17 */ 18 19 #include "qemu/osdep.h" 20 #include "fsdev/qemu-fsdev.h" 21 #include "qemu/thread.h" 22 #include "qemu/coroutine.h" 23 #include "qemu/main-loop.h" 24 #include "coth.h" 25 26 int coroutine_fn v9fs_co_llistxattr(V9fsPDU *pdu, V9fsPath *path, void *value, 27 size_t size) 28 { 29 int err; 30 V9fsState *s = pdu->s; 31 32 if (v9fs_request_cancelled(pdu)) { 33 return -EINTR; 34 } 35 v9fs_path_read_lock(s); 36 v9fs_co_run_in_worker( 37 { 38 err = s->ops->llistxattr(&s->ctx, path, value, size); 39 if (err < 0) { 40 err = -errno; 41 } 42 }); 43 v9fs_path_unlock(s); 44 return err; 45 } 46 47 int coroutine_fn v9fs_co_lgetxattr(V9fsPDU *pdu, V9fsPath *path, 48 V9fsString *xattr_name, void *value, 49 size_t size) 50 { 51 int err; 52 V9fsState *s = pdu->s; 53 54 if (v9fs_request_cancelled(pdu)) { 55 return -EINTR; 56 } 57 v9fs_path_read_lock(s); 58 v9fs_co_run_in_worker( 59 { 60 err = s->ops->lgetxattr(&s->ctx, path, 61 xattr_name->data, 62 value, size); 63 if (err < 0) { 64 err = -errno; 65 } 66 }); 67 v9fs_path_unlock(s); 68 return err; 69 } 70 71 int coroutine_fn v9fs_co_lsetxattr(V9fsPDU *pdu, V9fsPath *path, 72 V9fsString *xattr_name, void *value, 73 size_t size, int flags) 74 { 75 int err; 76 V9fsState *s = pdu->s; 77 78 if (v9fs_request_cancelled(pdu)) { 79 return -EINTR; 80 } 81 v9fs_path_read_lock(s); 82 v9fs_co_run_in_worker( 83 { 84 err = s->ops->lsetxattr(&s->ctx, path, 85 xattr_name->data, value, 86 size, flags); 87 if (err < 0) { 88 err = -errno; 89 } 90 }); 91 v9fs_path_unlock(s); 92 return err; 93 } 94 95 int coroutine_fn v9fs_co_lremovexattr(V9fsPDU *pdu, V9fsPath *path, 96 V9fsString *xattr_name) 97 { 98 int err; 99 V9fsState *s = pdu->s; 100 101 if (v9fs_request_cancelled(pdu)) { 102 return -EINTR; 103 } 104 v9fs_path_read_lock(s); 105 v9fs_co_run_in_worker( 106 { 107 err = s->ops->lremovexattr(&s->ctx, path, xattr_name->data); 108 if (err < 0) { 109 err = -errno; 110 } 111 }); 112 v9fs_path_unlock(s); 113 return err; 114 } 115