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cachefiles: Add cache error reporting macro 

Add a macro to report a cache I/O error and to tell fscache that the cache
is in trouble.

Also add a pointer to the fscache cache cookie from the cachefiles_cache
struct as we need that to pass to fscache_io_error().

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
Link: https://lore.kernel.org/r/163819626562.215744.1503690975344731661.stgit@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/163906927235.143852.13694625647880837563.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/163967137158.1823006.2065038830569321335.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/164021536053.640689.5306822604644352548.stgit@warthog.procyon.org.uk/ # v4
This commit is contained in:
David Howells 2021-10-21 09:08:54 +01:00
parent ecf5a6ce15
commit 1493bf74bc
1 changed files with 11 additions and 0 deletions
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11
fs/cachefiles/internal.h
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@ -30,6 +30,7 @@ struct cachefiles_object {
* Cache files cache definition * Cache files cache definition
*/ */
struct cachefiles_cache { struct cachefiles_cache {
struct fscache_cache *cache; /* Cache cookie */
struct vfsmount *mnt; /* mountpoint holding the cache */ struct vfsmount *mnt; /* mountpoint holding the cache */
struct file *cachefilesd; /* manager daemon handle */ struct file *cachefilesd; /* manager daemon handle */
const struct cred *cache_cred; /* security override for accessing cache */ const struct cred *cache_cred; /* security override for accessing cache */
@ -103,6 +104,16 @@ static inline int cachefiles_inject_remove_error(void)
return cachefiles_error_injection_state & 2 ? -EIO : 0; return cachefiles_error_injection_state & 2 ? -EIO : 0;
} }
/*
* Error handling
*/
#define cachefiles_io_error(___cache, FMT, ...) \
do { \
pr_err("I/O Error: " FMT"\n", ##__VA_ARGS__); \
fscache_io_error((___cache)->cache); \
set_bit(CACHEFILES_DEAD, &(___cache)->flags); \
} while (0)
/* /*
* Debug tracing * Debug tracing