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ubifs: Rework ubifs_assert()

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With having access to struct ubifs_info in ubifs_assert() we can
give more information when an assert is failing.
By using ubifs_err() we can tell which UBIFS instance failed.

Also multiple actions can be taken now.
We support:
 - report: This is what UBIFS did so far, just report the failure and go
   on.
 - read-only: Switch to read-only mode.
 - panic: shoot the kernel in the head.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2018-07-12 13:01:58 +02:00
parent 6eb61d587f
commit 2e52eb7446
3 changed files with 42 additions and 4 deletions
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10
fs/ubifs/debug.h
View file

@ -148,18 +148,20 @@ struct ubifs_global_debug_info {
unsigned int tst_rcvry:1;
};
void ubifs_assert_failed(struct ubifs_info *c, const char *expr,
const char *file, int line);
#define ubifs_assert(c, expr) do { \
if (unlikely(!(expr))) { \
pr_crit("UBIFS assert failed in %s at %u (pid %d)\n", \
__func__, __LINE__, current->pid); \
dump_stack(); \
ubifs_assert_failed((struct ubifs_info *)c, #expr, __FILE__, \
__LINE__); \
} \
} while (0)
#define ubifs_assert_cmt_locked(c) do { \
if (unlikely(down_write_trylock(&(c)->commit_sem))) { \
up_write(&(c)->commit_sem); \
pr_crit("commit lock is not locked!\n"); \
ubifs_err(c, "commit lock is not locked!\n"); \
ubifs_assert(c, 0); \
} \
} while (0)