Messages in this thread Patch in this message | | | Date | Tue, 25 Mar 2003 17:39:40 GMT | From | Stephen Tweedie <> | Subject | [Patch 5/8] 2.4: Add less-severe assert-failure form for ext3. |
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Add a new form of assert failure in ext3 which allows us to flag events which are *usually* bugs, but which can be legally triggered in the presence of IO failures. Don't panic the kernel on such errors unless we've defined #JBD_PARANOID_IOFAIL, which will normally be set only for testing purposes.
--- linux-2.4-ext3push/include/linux/jbd.h.=K0004=.orig 2003-03-25 10:59:15.000000000 +0000 +++ linux-2.4-ext3push/include/linux/jbd.h 2003-03-25 10:59:15.000000000 +0000 @@ -40,6 +40,15 @@ */ #undef JBD_PARANOID_WRITES +/* + * Define JBD_PARANIOD_IOFAIL to cause a kernel BUG() if ext3 finds + * certain classes of error which can occur due to failed IOs. Under + * normal use we want ext3 to continue after such errors, because + * hardware _can_ fail, but for debugging purposes when running tests on + * known-good hardware we may want to trap these errors. + */ +#undef JBD_PARANOID_IOFAIL + #ifdef CONFIG_JBD_DEBUG /* * Define JBD_EXPENSIVE_CHECKING to enable more expensive internal @@ -263,6 +272,23 @@ void buffer_assertion_failure(struct buf #define J_ASSERT(assert) do { } while (0) #endif /* JBD_ASSERTIONS */ +#if defined(JBD_PARANOID_IOFAIL) +#define J_EXPECT(expr, why...) J_ASSERT(expr) +#define J_EXPECT_BH(bh, expr, why...) J_ASSERT_BH(bh, expr) +#define J_EXPECT_JH(jh, expr, why...) J_ASSERT_JH(jh, expr) +#else +#define __journal_expect(expr, why...) \ + do { \ + if (!(expr)) { \ + printk(KERN_ERR "EXT3-fs unexpected failure: %s;\n", # expr); \ + printk(KERN_ERR ## why); \ + } \ + } while (0) +#define J_EXPECT(expr, why...) __journal_expect(expr, ## why) +#define J_EXPECT_BH(bh, expr, why...) __journal_expect(expr, ## why) +#define J_EXPECT_JH(jh, expr, why...) __journal_expect(expr, ## why) +#endif + enum jbd_state_bits { BH_JWrite = BH_PrivateStart, /* 1 if being written to log (@@@ DEBUGGING) */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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