| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 19 Dec 2016 17:21:26 +0800
From: Gang He <ghe@...e.com>
To: mfasheh@...sity.com, jlbec@...lplan.org
Cc: Gang He <ghe@...e.com>, linux-kernel@...r.kernel.org,
ocfs2-devel@....oracle.com, akpm@...ux-foundation.org
Subject: [PATCH 1/2] ocfs2: add kobject for online file check
Use embedded kobject mechanism for online file check feature,
this will avoid to use a global list to save/search per-device online file
check related data. The changed code is based on Goldwyn Rodrigues's
patches and ext4 fs code.
Second, some small adjustment/fixes are also included.
1) move some data structure definitions to the header file;
2) tune mlog message level from ERROR to NOTICE;
3) add file check duplicative ino number check;
4) the other miscellaneous.
Signed-off-by: Gang He <ghe@...e.com>
---
fs/ocfs2/filecheck.c | 360 ++++++++++++++++++++-------------------------------
fs/ocfs2/filecheck.h | 29 ++++-
2 files changed, 165 insertions(+), 224 deletions(-)
diff --git a/fs/ocfs2/filecheck.c b/fs/ocfs2/filecheck.c
index 2cabbcf..5a6ae70 100644
--- a/fs/ocfs2/filecheck.c
+++ b/fs/ocfs2/filecheck.c
@@ -53,36 +53,6 @@
"UNSUPPORTED"
};
-static DEFINE_SPINLOCK(ocfs2_filecheck_sysfs_lock);
-static LIST_HEAD(ocfs2_filecheck_sysfs_list);
-
-struct ocfs2_filecheck {
- struct list_head fc_head; /* File check entry list head */
- spinlock_t fc_lock;
- unsigned int fc_max; /* Maximum number of entry in list */
- unsigned int fc_size; /* Current entry count in list */
- unsigned int fc_done; /* Finished entry count in list */
-};
-
-struct ocfs2_filecheck_sysfs_entry { /* sysfs entry per mounting */
- struct list_head fs_list;
- atomic_t fs_count;
- struct super_block *fs_sb;
- struct kset *fs_devicekset;
- struct kset *fs_fcheckkset;
- struct ocfs2_filecheck *fs_fcheck;
-};
-
-#define OCFS2_FILECHECK_MAXSIZE 100
-#define OCFS2_FILECHECK_MINSIZE 10
-
-/* File check operation type */
-enum {
- OCFS2_FILECHECK_TYPE_CHK = 0, /* Check a file(inode) */
- OCFS2_FILECHECK_TYPE_FIX, /* Fix a file(inode) */
- OCFS2_FILECHECK_TYPE_SET = 100 /* Set entry list maximum size */
-};
-
struct ocfs2_filecheck_entry {
struct list_head fe_list;
unsigned long fe_ino;
@@ -110,40 +80,84 @@ struct ocfs2_filecheck_args {
return ocfs2_filecheck_errs[errno - OCFS2_FILECHECK_ERR_START + 1];
}
-static ssize_t ocfs2_filecheck_show(struct kobject *kobj,
- struct kobj_attribute *attr,
- char *buf);
-static ssize_t ocfs2_filecheck_store(struct kobject *kobj,
- struct kobj_attribute *attr,
- const char *buf, size_t count);
-static struct kobj_attribute ocfs2_attr_filecheck_chk =
+static ssize_t ocfs2_filecheck_attr_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *buf);
+static ssize_t ocfs2_filecheck_attr_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count);
+static struct kobj_attribute ocfs2_filecheck_attr_chk =
__ATTR(check, S_IRUSR | S_IWUSR,
- ocfs2_filecheck_show,
- ocfs2_filecheck_store);
-static struct kobj_attribute ocfs2_attr_filecheck_fix =
+ ocfs2_filecheck_attr_show,
+ ocfs2_filecheck_attr_store);
+static struct kobj_attribute ocfs2_filecheck_attr_fix =
__ATTR(fix, S_IRUSR | S_IWUSR,
- ocfs2_filecheck_show,
- ocfs2_filecheck_store);
-static struct kobj_attribute ocfs2_attr_filecheck_set =
+ ocfs2_filecheck_attr_show,
+ ocfs2_filecheck_attr_store);
+static struct kobj_attribute ocfs2_filecheck_attr_set =
__ATTR(set, S_IRUSR | S_IWUSR,
- ocfs2_filecheck_show,
- ocfs2_filecheck_store);
+ ocfs2_filecheck_attr_show,
+ ocfs2_filecheck_attr_store);
+static struct attribute *ocfs2_filecheck_attrs[] = {
+ &ocfs2_filecheck_attr_chk.attr,
+ &ocfs2_filecheck_attr_fix.attr,
+ &ocfs2_filecheck_attr_set.attr,
+ NULL
+};
-static int ocfs2_filecheck_sysfs_wait(atomic_t *p)
+static void ocfs2_filecheck_release(struct kobject *kobj)
{
- schedule();
- return 0;
+ struct ocfs2_filecheck_sysfs_entry *entry = container_of(kobj,
+ struct ocfs2_filecheck_sysfs_entry, fs_kobj);
+
+ complete(&entry->fs_kobj_unregister);
}
+static ssize_t
+ocfs2_filecheck_show(struct kobject *kobj, struct attribute *attr, char *buf)
+{
+ ssize_t ret = -EIO;
+ struct kobj_attribute *kattr = container_of(attr,
+ struct kobj_attribute, attr);
+
+ kobject_get(kobj);
+ if (kattr->show)
+ ret = kattr->show(kobj, kattr, buf);
+ kobject_put(kobj);
+ return ret;
+}
+
+static ssize_t
+ocfs2_filecheck_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t count)
+{
+ ssize_t ret = -EIO;
+ struct kobj_attribute *kattr = container_of(attr,
+ struct kobj_attribute, attr);
+
+ kobject_get(kobj);
+ if (kattr->store)
+ ret = kattr->store(kobj, kattr, buf, count);
+ kobject_put(kobj);
+ return ret;
+}
+
+static const struct sysfs_ops ocfs2_filecheck_ops = {
+ .show = ocfs2_filecheck_show,
+ .store = ocfs2_filecheck_store,
+};
+
+static struct kobj_type ocfs2_ktype_filecheck = {
+ .default_attrs = ocfs2_filecheck_attrs,
+ .sysfs_ops = &ocfs2_filecheck_ops,
+ .release = ocfs2_filecheck_release,
+};
+
static void
ocfs2_filecheck_sysfs_free(struct ocfs2_filecheck_sysfs_entry *entry)
{
struct ocfs2_filecheck_entry *p;
- if (!atomic_dec_and_test(&entry->fs_count))
- wait_on_atomic_t(&entry->fs_count, ocfs2_filecheck_sysfs_wait,
- TASK_UNINTERRUPTIBLE);
-
spin_lock(&entry->fs_fcheck->fc_lock);
while (!list_empty(&entry->fs_fcheck->fc_head)) {
p = list_first_entry(&entry->fs_fcheck->fc_head,
@@ -154,151 +168,48 @@ static int ocfs2_filecheck_sysfs_wait(atomic_t *p)
}
spin_unlock(&entry->fs_fcheck->fc_lock);
- kset_unregister(entry->fs_fcheckkset);
- kset_unregister(entry->fs_devicekset);
kfree(entry->fs_fcheck);
- kfree(entry);
-}
-
-static void
-ocfs2_filecheck_sysfs_add(struct ocfs2_filecheck_sysfs_entry *entry)
-{
- spin_lock(&ocfs2_filecheck_sysfs_lock);
- list_add_tail(&entry->fs_list, &ocfs2_filecheck_sysfs_list);
- spin_unlock(&ocfs2_filecheck_sysfs_lock);
+ entry->fs_fcheck = NULL;
}
-static int ocfs2_filecheck_sysfs_del(const char *devname)
-{
- struct ocfs2_filecheck_sysfs_entry *p;
-
- spin_lock(&ocfs2_filecheck_sysfs_lock);
- list_for_each_entry(p, &ocfs2_filecheck_sysfs_list, fs_list) {
- if (!strcmp(p->fs_sb->s_id, devname)) {
- list_del(&p->fs_list);
- spin_unlock(&ocfs2_filecheck_sysfs_lock);
- ocfs2_filecheck_sysfs_free(p);
- return 0;
- }
- }
- spin_unlock(&ocfs2_filecheck_sysfs_lock);
- return 1;
-}
-
-static void
-ocfs2_filecheck_sysfs_put(struct ocfs2_filecheck_sysfs_entry *entry)
+int ocfs2_filecheck_create_sysfs(struct ocfs2_super *osb)
{
- if (atomic_dec_and_test(&entry->fs_count))
- wake_up_atomic_t(&entry->fs_count);
-}
-
-static struct ocfs2_filecheck_sysfs_entry *
-ocfs2_filecheck_sysfs_get(const char *devname)
-{
- struct ocfs2_filecheck_sysfs_entry *p = NULL;
-
- spin_lock(&ocfs2_filecheck_sysfs_lock);
- list_for_each_entry(p, &ocfs2_filecheck_sysfs_list, fs_list) {
- if (!strcmp(p->fs_sb->s_id, devname)) {
- atomic_inc(&p->fs_count);
- spin_unlock(&ocfs2_filecheck_sysfs_lock);
- return p;
- }
- }
- spin_unlock(&ocfs2_filecheck_sysfs_lock);
- return NULL;
-}
-
-int ocfs2_filecheck_create_sysfs(struct super_block *sb)
-{
- int ret = 0;
- struct kset *device_kset = NULL;
- struct kset *fcheck_kset = NULL;
- struct ocfs2_filecheck *fcheck = NULL;
- struct ocfs2_filecheck_sysfs_entry *entry = NULL;
- struct attribute **attrs = NULL;
- struct attribute_group attrgp;
-
- if (!ocfs2_kset)
- return -ENOMEM;
-
- attrs = kmalloc(sizeof(struct attribute *) * 4, GFP_NOFS);
- if (!attrs) {
- ret = -ENOMEM;
- goto error;
- } else {
- attrs[0] = &ocfs2_attr_filecheck_chk.attr;
- attrs[1] = &ocfs2_attr_filecheck_fix.attr;
- attrs[2] = &ocfs2_attr_filecheck_set.attr;
- attrs[3] = NULL;
- memset(&attrgp, 0, sizeof(attrgp));
- attrgp.attrs = attrs;
- }
+ int ret;
+ struct ocfs2_filecheck *fcheck;
+ struct ocfs2_filecheck_sysfs_entry *entry = &osb->osb_fc_ent;
fcheck = kmalloc(sizeof(struct ocfs2_filecheck), GFP_NOFS);
- if (!fcheck) {
- ret = -ENOMEM;
- goto error;
- } else {
- INIT_LIST_HEAD(&fcheck->fc_head);
- spin_lock_init(&fcheck->fc_lock);
- fcheck->fc_max = OCFS2_FILECHECK_MINSIZE;
- fcheck->fc_size = 0;
- fcheck->fc_done = 0;
- }
-
- if (strlen(sb->s_id) <= 0) {
- mlog(ML_ERROR,
- "Cannot get device basename when create filecheck sysfs\n");
- ret = -ENODEV;
- goto error;
- }
-
- device_kset = kset_create_and_add(sb->s_id, NULL, &ocfs2_kset->kobj);
- if (!device_kset) {
- ret = -ENOMEM;
- goto error;
- }
-
- fcheck_kset = kset_create_and_add("filecheck", NULL,
- &device_kset->kobj);
- if (!fcheck_kset) {
- ret = -ENOMEM;
- goto error;
- }
-
- ret = sysfs_create_group(&fcheck_kset->kobj, &attrgp);
- if (ret)
- goto error;
+ if (!fcheck)
+ return -ENOMEM;
- entry = kmalloc(sizeof(struct ocfs2_filecheck_sysfs_entry), GFP_NOFS);
- if (!entry) {
- ret = -ENOMEM;
- goto error;
- } else {
- atomic_set(&entry->fs_count, 1);
- entry->fs_sb = sb;
- entry->fs_devicekset = device_kset;
- entry->fs_fcheckkset = fcheck_kset;
- entry->fs_fcheck = fcheck;
- ocfs2_filecheck_sysfs_add(entry);
+ INIT_LIST_HEAD(&fcheck->fc_head);
+ spin_lock_init(&fcheck->fc_lock);
+ fcheck->fc_max = OCFS2_FILECHECK_MINSIZE;
+ fcheck->fc_size = 0;
+ fcheck->fc_done = 0;
+
+ entry->fs_kobj.kset = osb->osb_dev_kset;
+ init_completion(&entry->fs_kobj_unregister);
+ ret = kobject_init_and_add(&entry->fs_kobj, &ocfs2_ktype_filecheck,
+ NULL, "filecheck");
+ if (ret) {
+ kfree(fcheck);
+ return ret;
}
- kfree(attrs);
+ entry->fs_fcheck = fcheck;
return 0;
-
-error:
- kfree(attrs);
- kfree(entry);
- kfree(fcheck);
- kset_unregister(fcheck_kset);
- kset_unregister(device_kset);
- return ret;
}
-int ocfs2_filecheck_remove_sysfs(struct super_block *sb)
+void ocfs2_filecheck_remove_sysfs(struct ocfs2_super *osb)
{
- return ocfs2_filecheck_sysfs_del(sb->s_id);
+ if (!osb->osb_fc_ent.fs_fcheck)
+ return;
+
+ kobject_del(&osb->osb_fc_ent.fs_kobj);
+ kobject_put(&osb->osb_fc_ent.fs_kobj);
+ wait_for_completion(&osb->osb_fc_ent.fs_kobj_unregister);
+ ocfs2_filecheck_sysfs_free(&osb->osb_fc_ent);
}
static int
@@ -315,7 +226,7 @@ int ocfs2_filecheck_remove_sysfs(struct super_block *sb)
spin_lock(&ent->fs_fcheck->fc_lock);
if (len < (ent->fs_fcheck->fc_size - ent->fs_fcheck->fc_done)) {
- mlog(ML_ERROR,
+ mlog(ML_NOTICE,
"Cannot set online file check maximum entry number "
"to %u due to too many pending entries(%u)\n",
len, ent->fs_fcheck->fc_size - ent->fs_fcheck->fc_done);
@@ -392,7 +303,7 @@ int ocfs2_filecheck_remove_sysfs(struct super_block *sb)
return 0;
}
-static ssize_t ocfs2_filecheck_show(struct kobject *kobj,
+static ssize_t ocfs2_filecheck_attr_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
@@ -400,19 +311,12 @@ static ssize_t ocfs2_filecheck_show(struct kobject *kobj,
ssize_t ret = 0, total = 0, remain = PAGE_SIZE;
unsigned int type;
struct ocfs2_filecheck_entry *p;
- struct ocfs2_filecheck_sysfs_entry *ent;
+ struct ocfs2_filecheck_sysfs_entry *ent = container_of(kobj,
+ struct ocfs2_filecheck_sysfs_entry, fs_kobj);
if (ocfs2_filecheck_type_parse(attr->attr.name, &type))
return -EINVAL;
- ent = ocfs2_filecheck_sysfs_get(kobj->parent->name);
- if (!ent) {
- mlog(ML_ERROR,
- "Cannot get the corresponding entry via device basename %s\n",
- kobj->name);
- return -ENODEV;
- }
-
if (type == OCFS2_FILECHECK_TYPE_SET) {
spin_lock(&ent->fs_fcheck->fc_lock);
total = snprintf(buf, remain, "%u\n", ent->fs_fcheck->fc_max);
@@ -446,11 +350,27 @@ static ssize_t ocfs2_filecheck_show(struct kobject *kobj,
spin_unlock(&ent->fs_fcheck->fc_lock);
exit:
- ocfs2_filecheck_sysfs_put(ent);
return total;
}
-static int
+
+static inline int
+ocfs2_filecheck_is_dup_entry(struct ocfs2_filecheck_sysfs_entry *ent,
+ unsigned long ino)
+{
+ struct ocfs2_filecheck_entry *p;
+
+ list_for_each_entry(p, &ent->fs_fcheck->fc_head, fe_list) {
+ if (!p->fe_done) {
+ if (p->fe_ino == ino)
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static inline int
ocfs2_filecheck_erase_entry(struct ocfs2_filecheck_sysfs_entry *ent)
{
struct ocfs2_filecheck_entry *p;
@@ -489,21 +409,21 @@ static ssize_t ocfs2_filecheck_show(struct kobject *kobj,
ocfs2_filecheck_done_entry(struct ocfs2_filecheck_sysfs_entry *ent,
struct ocfs2_filecheck_entry *entry)
{
- entry->fe_done = 1;
spin_lock(&ent->fs_fcheck->fc_lock);
+ entry->fe_done = 1;
ent->fs_fcheck->fc_done++;
spin_unlock(&ent->fs_fcheck->fc_lock);
}
static unsigned int
-ocfs2_filecheck_handle(struct super_block *sb,
+ocfs2_filecheck_handle(struct ocfs2_super *osb,
unsigned long ino, unsigned int flags)
{
unsigned int ret = OCFS2_FILECHECK_ERR_SUCCESS;
struct inode *inode = NULL;
int rc;
- inode = ocfs2_iget(OCFS2_SB(sb), ino, flags, 0);
+ inode = ocfs2_iget(osb, ino, flags, 0);
if (IS_ERR(inode)) {
rc = (int)(-(long)inode);
if (rc >= OCFS2_FILECHECK_ERR_START &&
@@ -521,11 +441,14 @@ static ssize_t ocfs2_filecheck_show(struct kobject *kobj,
ocfs2_filecheck_handle_entry(struct ocfs2_filecheck_sysfs_entry *ent,
struct ocfs2_filecheck_entry *entry)
{
+ struct ocfs2_super *osb = container_of(ent, struct ocfs2_super,
+ osb_fc_ent);
+
if (entry->fe_type == OCFS2_FILECHECK_TYPE_CHK)
- entry->fe_status = ocfs2_filecheck_handle(ent->fs_sb,
+ entry->fe_status = ocfs2_filecheck_handle(osb,
entry->fe_ino, OCFS2_FI_FLAG_FILECHECK_CHK);
else if (entry->fe_type == OCFS2_FILECHECK_TYPE_FIX)
- entry->fe_status = ocfs2_filecheck_handle(ent->fs_sb,
+ entry->fe_status = ocfs2_filecheck_handle(osb,
entry->fe_ino, OCFS2_FI_FLAG_FILECHECK_FIX);
else
entry->fe_status = OCFS2_FILECHECK_ERR_UNSUPPORTED;
@@ -533,30 +456,21 @@ static ssize_t ocfs2_filecheck_show(struct kobject *kobj,
ocfs2_filecheck_done_entry(ent, entry);
}
-static ssize_t ocfs2_filecheck_store(struct kobject *kobj,
+static ssize_t ocfs2_filecheck_attr_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
+ ssize_t ret = 0;
struct ocfs2_filecheck_args args;
struct ocfs2_filecheck_entry *entry;
- struct ocfs2_filecheck_sysfs_entry *ent;
- ssize_t ret = 0;
+ struct ocfs2_filecheck_sysfs_entry *ent = container_of(kobj,
+ struct ocfs2_filecheck_sysfs_entry, fs_kobj);
if (count == 0)
- return count;
+ return 0; /* nothing to do */
- if (ocfs2_filecheck_args_parse(attr->attr.name, buf, count, &args)) {
- mlog(ML_ERROR, "Invalid arguments for online file check\n");
+ if (ocfs2_filecheck_args_parse(attr->attr.name, buf, count, &args))
return -EINVAL;
- }
-
- ent = ocfs2_filecheck_sysfs_get(kobj->parent->name);
- if (!ent) {
- mlog(ML_ERROR,
- "Cannot get the corresponding entry via device basename %s\n",
- kobj->parent->name);
- return -ENODEV;
- }
if (args.fa_type == OCFS2_FILECHECK_TYPE_SET) {
ret = ocfs2_filecheck_adjust_max(ent, args.fa_len);
@@ -570,13 +484,16 @@ static ssize_t ocfs2_filecheck_store(struct kobject *kobj,
}
spin_lock(&ent->fs_fcheck->fc_lock);
- if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) &&
- (ent->fs_fcheck->fc_done == 0)) {
- mlog(ML_ERROR,
+ if (ocfs2_filecheck_is_dup_entry(ent, args.fa_ino)) {
+ ret = -EEXIST;
+ kfree(entry);
+ } else if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) &&
+ (ent->fs_fcheck->fc_done == 0)) {
+ mlog(ML_NOTICE,
"Cannot do more file check "
"since file check queue(%u) is full now\n",
ent->fs_fcheck->fc_max);
- ret = -EBUSY;
+ ret = -EAGAIN;
kfree(entry);
} else {
if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) &&
@@ -601,6 +518,5 @@ static ssize_t ocfs2_filecheck_store(struct kobject *kobj,
ocfs2_filecheck_handle_entry(ent, entry);
exit:
- ocfs2_filecheck_sysfs_put(ent);
return (!ret ? count : ret);
}
diff --git a/fs/ocfs2/filecheck.h b/fs/ocfs2/filecheck.h
index e5cd002..6a22ee7 100644
--- a/fs/ocfs2/filecheck.h
+++ b/fs/ocfs2/filecheck.h
@@ -43,7 +43,32 @@ enum {
#define OCFS2_FILECHECK_ERR_START OCFS2_FILECHECK_ERR_FAILED
#define OCFS2_FILECHECK_ERR_END OCFS2_FILECHECK_ERR_UNSUPPORTED
-int ocfs2_filecheck_create_sysfs(struct super_block *sb);
-int ocfs2_filecheck_remove_sysfs(struct super_block *sb);
+struct ocfs2_filecheck {
+ struct list_head fc_head; /* File check entry list head */
+ spinlock_t fc_lock;
+ unsigned int fc_max; /* Maximum number of entry in list */
+ unsigned int fc_size; /* Current entry count in list */
+ unsigned int fc_done; /* Finished entry count in list */
+};
+
+#define OCFS2_FILECHECK_MAXSIZE 100
+#define OCFS2_FILECHECK_MINSIZE 10
+
+/* File check operation type */
+enum {
+ OCFS2_FILECHECK_TYPE_CHK = 0, /* Check a file(inode) */
+ OCFS2_FILECHECK_TYPE_FIX, /* Fix a file(inode) */
+ OCFS2_FILECHECK_TYPE_SET = 100 /* Set entry list maximum size */
+};
+
+struct ocfs2_filecheck_sysfs_entry { /* sysfs entry per partition */
+ struct kobject fs_kobj;
+ struct completion fs_kobj_unregister;
+ struct ocfs2_filecheck *fs_fcheck;
+};
+
+
+int ocfs2_filecheck_create_sysfs(struct ocfs2_super *osb);
+void ocfs2_filecheck_remove_sysfs(struct ocfs2_super *osb);
#endif /* FILECHECK_H */
--
1.8.5.6
Powered by blists - more mailing lists