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35 .Nd allocate storage for a file
40 .Fn VOP_ALLOCATE "struct vnode *vp" "off_t *offset" "off_t *len"
42 This call allocates storage for a range of offsets in a file.
43 It is used to implement the
48 .Bl -tag -width offset
50 The vnode of the file.
52 The start of the range to allocate storage for in the file.
54 The length of the range to allocate storage for in the file.
61 arguments are updated to reflect the portion of the range that
62 still needs to be allocated on return.
63 A partial allocation is considered a successful operation.
64 The file's contents are not changed.
66 The file should be exclusively locked on entry and will still be locked on exit.
68 Zero is returned if the call is successful, otherwise an appropriate
69 error code is returned.
73 An attempt was made to write a file that exceeds the process's file size
74 limit or the maximum file size.
76 The file system is full.
78 An append-only flag is set on the file, but the caller is attempting to
79 write before the current end of file.