36 lines
892 B
C
36 lines
892 B
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_MEMFD_H
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#define __LINUX_MEMFD_H
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#include <linux/file.h>
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#ifdef CONFIG_MEMFD_CREATE
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extern long memfd_fcntl(struct file *file, unsigned int cmd, unsigned int arg);
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struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx);
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unsigned int *memfd_file_seals_ptr(struct file *file);
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#else
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static inline long memfd_fcntl(struct file *f, unsigned int c, unsigned int a)
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{
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return -EINVAL;
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}
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static inline struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx)
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{
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return ERR_PTR(-EINVAL);
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}
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static inline unsigned int *memfd_file_seals_ptr(struct file *file)
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{
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return NULL;
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}
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#endif
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/* Retrieve memfd seals associated with the file, if any. */
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static inline unsigned int memfd_file_seals(struct file *file)
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{
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unsigned int *sealsp = memfd_file_seals_ptr(file);
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return sealsp ? *sealsp : 0;
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}
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#endif /* __LINUX_MEMFD_H */
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