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Added a "reenter" parameter to the {read|write}_pages() functions to give file

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systems a chance to know if they have locked already.
This fixes a locking problem in BFS where one thread tried to acquire two read
locks (where someone else trying to acquire a write lock would have caused a
dead lock).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17108 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2006-04-12 13:34:04 +00:00
parent 4d89d3e7e1
commit 97e069713b
18 changed files with 104 additions and 80 deletions
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headers/private/kernel/vfs.h
+2 -2
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@@ -87,9 +87,9 @@ void vfs_acquire_vnode(void *vnode);
status_t vfs_get_cookie_from_fd(int fd, void **_cookie);
bool vfs_can_page(void *vnode, void *cookie);
status_t vfs_read_pages(void *vnode, void *cookie, off_t pos,
const iovec *vecs, size_t count, size_t *_numBytes);
const iovec *vecs, size_t count, size_t *_numBytes, bool fsReenter);
status_t vfs_write_pages(void *vnode, void *cookie, off_t pos,
const iovec *vecs, size_t count, size_t *_numBytes);
const iovec *vecs, size_t count, size_t *_numBytes, bool fsReenter);
status_t vfs_get_vnode_cache(void *vnode, struct vm_cache_ref **_cache, bool allocate);
status_t vfs_get_file_map( void *_vnode, off_t offset, size_t size,
struct file_io_vec *vecs, size_t *_count);