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5674609535
The types around kmsg_bytes were inconsistent. The global was unsigned long, the argument to pstore_set_kmsg_bytes() was int, and the filesystem option was u32. Given other internal limits, there's not much sense in making a single pstore record larger than INT_MAX and it can't be negative, so use u32 everywhere. Additionally, use READ/WRITE_ONCE and a local variable in pstore_dump() to avoid kmsg_bytes changing during a dump. Link: https://lore.kernel.org/r/20250206191655.work.798-kees@kernel.org Signed-off-by: Kees Cook <kees@kernel.org>
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PSTORE_INTERNAL_H__
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#define __PSTORE_INTERNAL_H__
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#include <linux/types.h>
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#include <linux/time.h>
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#include <linux/pstore.h>
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extern unsigned int kmsg_bytes;
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#ifdef CONFIG_PSTORE_FTRACE
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extern void pstore_register_ftrace(void);
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extern void pstore_unregister_ftrace(void);
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ssize_t pstore_ftrace_combine_log(char **dest_log, size_t *dest_log_size,
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const char *src_log, size_t src_log_size);
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#else
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static inline void pstore_register_ftrace(void) {}
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static inline void pstore_unregister_ftrace(void) {}
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static inline ssize_t
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pstore_ftrace_combine_log(char **dest_log, size_t *dest_log_size,
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const char *src_log, size_t src_log_size)
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{
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*dest_log_size = 0;
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return 0;
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}
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#endif
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#ifdef CONFIG_PSTORE_PMSG
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extern void pstore_register_pmsg(void);
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extern void pstore_unregister_pmsg(void);
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#else
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static inline void pstore_register_pmsg(void) {}
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static inline void pstore_unregister_pmsg(void) {}
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#endif
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extern struct pstore_info *psinfo;
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extern void pstore_set_kmsg_bytes(unsigned int bytes);
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extern void pstore_get_records(int);
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extern void pstore_get_backend_records(struct pstore_info *psi,
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struct dentry *root, int quiet);
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extern int pstore_put_backend_records(struct pstore_info *psi);
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extern int pstore_mkfile(struct dentry *root,
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struct pstore_record *record);
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extern void pstore_record_init(struct pstore_record *record,
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struct pstore_info *psi);
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/* Called during pstore init/exit. */
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int __init pstore_init_fs(void);
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void __exit pstore_exit_fs(void);
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#endif
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