Rev 2679 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 2679 | Rev 2681 | ||
|---|---|---|---|
| Line 36... | Line 36... | ||
| 36 | */ |
36 | */ |
| 37 | 37 | ||
| 38 | #include <ipc/ipc.h> |
38 | #include <ipc/ipc.h> |
| 39 | #include <async.h> |
39 | #include <async.h> |
| 40 | #include <errno.h> |
40 | #include <errno.h> |
| 41 | #include <futex.h> |
41 | #include <rwlock.h> |
| 42 | #include <sys/types.h> |
42 | #include <sys/types.h> |
| 43 | #include <stdlib.h> |
43 | #include <stdlib.h> |
| 44 | #include "vfs.h" |
44 | #include "vfs.h" |
| 45 | 45 | ||
| 46 | void vfs_open(ipc_callid_t rid, ipc_call_t *request) |
46 | void vfs_open(ipc_callid_t rid, ipc_call_t *request) |
| Line 91... | Line 91... | ||
| 91 | /* |
91 | /* |
| 92 | * Avoid the race condition in which the file can be deleted before we |
92 | * Avoid the race condition in which the file can be deleted before we |
| 93 | * find/create-and-lock the VFS node corresponding to the looked-up |
93 | * find/create-and-lock the VFS node corresponding to the looked-up |
| 94 | * triplet. |
94 | * triplet. |
| 95 | */ |
95 | */ |
| 96 | futex_down(&namespace_futex); |
96 | rwlock_reader_lock(&namespace_rwlock); |
| 97 | 97 | ||
| 98 | /* |
98 | /* |
| 99 | * The path is now populated and we can call vfs_lookup_internal(). |
99 | * The path is now populated and we can call vfs_lookup_internal(). |
| 100 | */ |
100 | */ |
| 101 | vfs_triplet_t triplet; |
101 | vfs_triplet_t triplet; |
| 102 | rc = vfs_lookup_internal(path, size, &triplet, NULL); |
102 | rc = vfs_lookup_internal(path, size, &triplet, NULL); |
| 103 | if (rc) { |
103 | if (rc) { |
| 104 | futex_up(&namespace_futex); |
104 | rwlock_reader_unlock(&namespace_rwlock); |
| 105 | ipc_answer_0(rid, rc); |
105 | ipc_answer_0(rid, rc); |
| 106 | free(path); |
106 | free(path); |
| 107 | return; |
107 | return; |
| 108 | } |
108 | } |
| 109 | 109 | ||
| Line 111... | Line 111... | ||
| 111 | * Path is no longer needed. |
111 | * Path is no longer needed. |
| 112 | */ |
112 | */ |
| 113 | free(path); |
113 | free(path); |
| 114 | 114 | ||
| 115 | vfs_node_t *node = vfs_node_get(&triplet); |
115 | vfs_node_t *node = vfs_node_get(&triplet); |
| 116 | futex_up(&namespace_futex); |
116 | rwlock_reader_unlock(&namespace_rwlock); |
| 117 | 117 | ||
| 118 | /* |
118 | /* |
| 119 | * Get ourselves a file descriptor and the corresponding vfs_file_t |
119 | * Get ourselves a file descriptor and the corresponding vfs_file_t |
| 120 | * structure. |
120 | * structure. |
| 121 | */ |
121 | */ |