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Subject[PATCH 2/2] pstore: Differentiating names by adding count and timestamp
Date
From: Madper Xie <bbboson@gmail.com>

pstore denominates dumped file as type-psname-id. it makes many file have
the same name if there are many entries in backend have the same id.
So adding count and timestamp to file name for differentiating.

Signed-off-by: Madper Xie <cxie@redhat.com>
---
fs/pstore/inode.c | 29 ++++++++++++++++++-----------
1 file changed, 18 insertions(+), 11 deletions(-)

diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index 0ae994c..36b502f 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -285,7 +285,7 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
int rc = 0;
char name[PSTORE_NAMELEN];
struct pstore_private *private, *pos;
- unsigned long flags;
+ unsigned long flags, timestamp;

spin_lock_irqsave(&allpstore_lock, flags);
list_for_each_entry(pos, &allpstore, list) {
@@ -316,35 +316,42 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
private->count = count;
private->psi = psi;
memcpy(&private->time, &time, sizeof(struct timespec));
+ timestamp = time.tv_sec;

switch (type) {
case PSTORE_TYPE_DMESG:
- sprintf(name, "dmesg-%s-%lld%s", psname, id,
- compressed ? ".enc.z" : "");
+ sprintf(name, "dmesg-%s-%lld-%d-%ld%s", psname, id, count,
+ timestamp, compressed ? ".enc.z" : "");
break;
case PSTORE_TYPE_CONSOLE:
- sprintf(name, "console-%s", psname);
+ sprintf(name, "console-%s-%d-%ld", psname, count, timestamp);
break;
case PSTORE_TYPE_FTRACE:
- sprintf(name, "ftrace-%s", psname);
+ sprintf(name, "ftrace-%s-%d-%ld", psname, count, timestamp);
break;
case PSTORE_TYPE_MCE:
- sprintf(name, "mce-%s-%lld", psname, id);
+ sprintf(name, "mce-%s-%lld-%d-%ld", psname, id, count,
+ timestamp);
break;
case PSTORE_TYPE_PPC_RTAS:
- sprintf(name, "rtas-%s-%lld", psname, id);
+ sprintf(name, "rtas-%s-%lld-%d-%ld", psname, id, count,
+ timestamp);
break;
case PSTORE_TYPE_PPC_OF:
- sprintf(name, "powerpc-ofw-%s-%lld", psname, id);
+ sprintf(name, "powerpc-ofw-%s-%lld-%d-%ld", psname, id, count,
+ timestamp);
break;
case PSTORE_TYPE_PPC_COMMON:
- sprintf(name, "powerpc-common-%s-%lld", psname, id);
+ sprintf(name, "powerpc-common-%s-%lld-%d-%ld", psname, id,
+ count, timestamp);
break;
case PSTORE_TYPE_UNKNOWN:
- sprintf(name, "unknown-%s-%lld", psname, id);
+ sprintf(name, "unknown-%s-%lld-%d-%ld", psname, id, count,
+ timestamp);
break;
default:
- sprintf(name, "type%d-%s-%lld", type, psname, id);
+ sprintf(name, "type%d-%s-%lld-%d-%ld", type, psname, id, count,
+ timestamp);
break;
}

--
1.8.4.2


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