Function report |
Source Code:fs\file.c |
Create Date:2022-07-28 20:08:31 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:Expand the file descriptor table.* This function will allocate a new fdtable and both fd array and fdset, of* the given size.* Return <0 error code on error; 1 on successful completion.
Proto:static int expand_fdtable(struct files_struct *files, unsigned int nr)__releases(files->file_lock) __acquires(files->file_lock)
Type:int
Parameter:
Type | Parameter | Name |
---|---|---|
struct files_struct * | files | |
unsigned int | nr |
155 | new_fdt = alloc_fdtable(nr) |
160 | If atomic_read( & ad mostly part) > 1 Then synchronize_rcu - wait until a grace period has elapsed |
170 | If Value for the false possibility is greater at compile time(max_fds <= nr) Then |
171 | __free_fdtable(new_fdt) |
172 | Return -EMFILE |
174 | cur_fdt = files_fdtable(files) |
178 | If cur_fdt != fdtab Then Post an RCU callback to be invoked after the end of an RCU grace* period. But since we have but one CPU, that would be after any* quiescent state. |
181 | smp_wmb() |
182 | Return 1 |
Name | Describe |
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expand_files | Expand files.* This function will expand the file structures, if the requested size exceeds* the current capacity and there is room for expansion.* Return <0 error code on error; 0 when nothing done; 1 when files were |
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