86 lines
2.7 KiB
Diff
86 lines
2.7 KiB
Diff
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From 575f0918313d593d24c40cf1839b97d7fcfebd0f Mon Sep 17 00:00:00 2001
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From: Josh Boyer <jwboyer@redhat.com>
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Date: Mon, 11 Feb 2013 18:07:48 -0500
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Subject: [PATCH] pstore: Create a convenient mount point for pstore
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Using /dev/pstore as a mount point for the pstore filesystem is slightly
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awkward. We don't normally mount filesystems in /dev/ and the /dev/pstore
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file isn't created automatically by anything. While this method will
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still work, we can create a persistent mount point in sysfs. This will
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put pstore on par with things like cgroups and efivarfs.
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Signed-off-by: Josh Boyer <jwboyer@redhat.com>
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---
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Documentation/ABI/testing/pstore | 10 +++++-----
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fs/pstore/inode.c | 18 +++++++++++++++++-
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2 files changed, 22 insertions(+), 6 deletions(-)
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diff --git a/Documentation/ABI/testing/pstore b/Documentation/ABI/testing/pstore
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index ff1df4e..5fca9f5 100644
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--- a/Documentation/ABI/testing/pstore
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+++ b/Documentation/ABI/testing/pstore
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@@ -1,4 +1,4 @@
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-Where: /dev/pstore/...
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+Where: /sys/fs/pstore/... (or /dev/pstore/...)
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Date: March 2011
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Kernel Version: 2.6.39
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Contact: tony.luck@intel.com
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@@ -11,9 +11,9 @@ Description: Generic interface to platform dependent persistent storage.
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of the console log is captured, but other interesting
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data can also be saved.
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- # mount -t pstore -o kmsg_bytes=8000 - /dev/pstore
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+ # mount -t pstore -o kmsg_bytes=8000 - /sys/fs/pstore
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- $ ls -l /dev/pstore
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+ $ ls -l /sys/fs/pstore/
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total 0
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-r--r--r-- 1 root root 7896 Nov 30 15:38 dmesg-erst-1
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@@ -27,9 +27,9 @@ Description: Generic interface to platform dependent persistent storage.
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the file will signal to the underlying persistent storage
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device that it can reclaim the space for later re-use.
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- $ rm /dev/pstore/dmesg-erst-1
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+ $ rm /sys/fs/pstore/dmesg-erst-1
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- The expectation is that all files in /dev/pstore
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+ The expectation is that all files in /sys/fs/pstore/
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will be saved elsewhere and erased from persistent store
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soon after boot to free up space ready for the next
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catastrophe.
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diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
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index 67de74c..e4bcb2c 100644
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--- a/fs/pstore/inode.c
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+++ b/fs/pstore/inode.c
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@@ -418,9 +418,25 @@ static struct file_system_type pstore_fs_type = {
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.kill_sb = pstore_kill_sb,
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};
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+static struct kobject *pstore_kobj;
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+
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static int __init init_pstore_fs(void)
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{
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- return register_filesystem(&pstore_fs_type);
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+ int err = 0;
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+
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+ /* Create a convenient mount point for people to access pstore */
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+ pstore_kobj = kobject_create_and_add("pstore", fs_kobj);
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+ if (!pstore_kobj) {
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+ err = -ENOMEM;
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+ goto out;
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+ }
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+
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+ err = register_filesystem(&pstore_fs_type);
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+ if (err < 0)
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+ kobject_put(pstore_kobj);
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+
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+out:
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+ return err;
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}
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module_init(init_pstore_fs)
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--
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1.8.1.2
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