| 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/main-loop.h" |
| 23 | #include "coth.h" |
| 24 | |
| 25 | int coroutine_fn v9fs_co_llistxattr(V9fsPDU *pdu, V9fsPath *path, void *value, |
| 26 | size_t size) |
| 27 | { |
| 28 | int err; |
| 29 | V9fsState *s = pdu->s; |
| 30 | |
| 31 | if (v9fs_request_cancelled(pdu)) { |
| 32 | return -EINTR; |
| 33 | } |
| 34 | v9fs_path_read_lock(s); |
| 35 | v9fs_co_run_in_worker( |
| 36 | { |
| 37 | err = s->ops->llistxattr(&s->ctx, path, value, size); |
| 38 | if (err < 0) { |
| 39 | err = -errno; |
| 40 | } |
| 41 | }); |
| 42 | v9fs_path_unlock(s); |
| 43 | return err; |
| 44 | } |
| 45 | |
| 46 | int coroutine_fn v9fs_co_lgetxattr(V9fsPDU *pdu, V9fsPath *path, |
| 47 | V9fsString *xattr_name, void *value, |
| 48 | size_t size) |
| 49 | { |
| 50 | int err; |
| 51 | V9fsState *s = pdu->s; |
| 52 | |
| 53 | if (v9fs_request_cancelled(pdu)) { |
| 54 | return -EINTR; |
| 55 | } |
| 56 | v9fs_path_read_lock(s); |
| 57 | v9fs_co_run_in_worker( |
| 58 | { |
| 59 | err = s->ops->lgetxattr(&s->ctx, path, |
| 60 | xattr_name->data, |
| 61 | value, size); |
| 62 | if (err < 0) { |
| 63 | err = -errno; |
| 64 | } |
| 65 | }); |
| 66 | v9fs_path_unlock(s); |
| 67 | return err; |
| 68 | } |
| 69 | |
| 70 | int coroutine_fn v9fs_co_lsetxattr(V9fsPDU *pdu, V9fsPath *path, |
| 71 | V9fsString *xattr_name, void *value, |
| 72 | size_t size, int flags) |
| 73 | { |
| 74 | int err; |
| 75 | V9fsState *s = pdu->s; |
| 76 | |
| 77 | if (v9fs_request_cancelled(pdu)) { |
| 78 | return -EINTR; |
| 79 | } |
| 80 | v9fs_path_read_lock(s); |
| 81 | v9fs_co_run_in_worker( |
| 82 | { |
| 83 | err = s->ops->lsetxattr(&s->ctx, path, |
| 84 | xattr_name->data, value, |
| 85 | size, flags); |
| 86 | if (err < 0) { |
| 87 | err = -errno; |
| 88 | } |
| 89 | }); |
| 90 | v9fs_path_unlock(s); |
| 91 | return err; |
| 92 | } |
| 93 | |
| 94 | int coroutine_fn v9fs_co_lremovexattr(V9fsPDU *pdu, V9fsPath *path, |
| 95 | V9fsString *xattr_name) |
| 96 | { |
| 97 | int err; |
| 98 | V9fsState *s = pdu->s; |
| 99 | |
| 100 | if (v9fs_request_cancelled(pdu)) { |
| 101 | return -EINTR; |
| 102 | } |
| 103 | v9fs_path_read_lock(s); |
| 104 | v9fs_co_run_in_worker( |
| 105 | { |
| 106 | err = s->ops->lremovexattr(&s->ctx, path, xattr_name->data); |
| 107 | if (err < 0) { |
| 108 | err = -errno; |
| 109 | } |
| 110 | }); |
| 111 | v9fs_path_unlock(s); |
| 112 | return err; |
| 113 | } |