Lustre and kernel buffer interaction
by John Bauer
I have been trying to understand a behavior I am observing in an IOR
benchmark on Lustre. I have pared it down to a simple example.
The IOR benchmark is running in MPI mode. There are 2 ranks, each
running on its own node. Each rank does the following:
Note : Test was run on the "swan" cluster at Cray Inc., using /lus/scratch
write a file. ( 10GB )
fsync the file
close the file
MPI_barrier
open the file that was written by the other rank.
read the file that was written by the other rank.
close the file that was written by the other rank.
The writing of each file goes as expected.
The fsync takes very little time ( about .05 seconds).
The first reads of the file( written by the other rank ) start out *very
*slowly. While theses first reads are proceeding slowly, the
kernel's cached memory ( the Cached: line in /proc/meminfo) decreases
from the size of the file just written to nearly zero.
Once the cached memory has reached nearly zero, the file reading
proceeds as expected.
I have attached a jpg of the instrumentation of the processes that
illustrates this behavior.
My questions are:
Why does the reading of the file, written by the other rank, wait until
the cached data drains to nearly zero before proceeding normally.
Shouldn't the fsync ensure that the file's data is written to the
backing storage so this draining of the cached memory should be simply
releasing pages with no further I/O?
For this case the "dead" time is only about 4 seconds, but this "dead"
time scales directly with the size of the files.
John
--
John Bauer
I/O Doctors LLC
507-766-0378
bauerj(a)iodoctors.com
6 years, 3 months
Re: [HPDD-discuss] [PATCH] staging: lustre: fix sparse warnings related to lock context imbalance
by Andreas Dilger
On Nov 28, 2014, at 11:50 AM, Greg KH <gregkh(a)linuxfoundation.org> wrote:
> On Thu, Nov 27, 2014 at 07:34:10PM +0100, Loïc Pefferkorn wrote:
>> Hello Greg,
>>
>> After some investigation, I think that removing these wrappers is not going to improve the code readability:
>>
>> On Wed, Nov 26, 2014 at 12:54:43PM -0800, Greg KH wrote:
>>> On Wed, Nov 26, 2014 at 05:15:48PM +0100, Loic Pefferkorn wrote:
>>>> Add __acquires() and __releases() function annotations, to fix sparse warnings related to lock context imbalance.
>>>>
>>>> diff --git a/drivers/staging/lustre/lustre/libcfs/hash.c b/drivers/staging/lustre/lustre/libcfs/hash.c
>>>> index 32da783..7c6e2a3 100644
>>>> --- a/drivers/staging/lustre/lustre/libcfs/hash.c
>>>> +++ b/drivers/staging/lustre/lustre/libcfs/hash.c
>>>> @@ -126,18 +126,21 @@ cfs_hash_nl_unlock(union cfs_hash_lock *lock, int exclusive) {}
>>>>
>>>> static inline void
>>>> cfs_hash_spin_lock(union cfs_hash_lock *lock, int exclusive)
>>>> + __acquires(&lock->spin)
>>>> {
>>>> spin_lock(&lock->spin);
>>>> }
>>>>
>>>> static inline void
>>>> cfs_hash_spin_unlock(union cfs_hash_lock *lock, int exclusive)
>>>> + __releases(&lock->spin)
>>>> {
>>>> spin_unlock(&lock->spin);
>>>> }
>>>
>>> Ugh, how horrid, please just delete these functions and push down the
>>> spin_lock/unlock calls down into the places these are called.
>>
>> cfs_hash_spin_lock() and cfs_hash_spin_unlock() are referenced by function pointers later in the same file:
>>
>> 165 /** no bucket lock, one spinlock to protect everything */
>> 166 static cfs_hash_lock_ops_t cfs_hash_nbl_lops = {
>> 167 .hs_lock = cfs_hash_spin_lock,
>> 168 .hs_unlock = cfs_hash_spin_unlock,
>> 169 .hs_bkt_lock = cfs_hash_nl_lock,
>> 170 .hs_bkt_unlock = cfs_hash_nl_unlock,
>> 171 };
>> 172
>> 173 /** spin bucket lock, rehash is enabled */
>> 174 static cfs_hash_lock_ops_t cfs_hash_bkt_spin_lops = {
>> 175 .hs_lock = cfs_hash_rw_lock,
>> 176 .hs_unlock = cfs_hash_rw_unlock,
>> 177 .hs_bkt_lock = cfs_hash_spin_lock,
>> 178 .hs_bkt_unlock = cfs_hash_spin_unlock,
>> 179 };
>
> That's even worse than I imagined. Putting sparse markings on these
> function calls is just papering over nonsense. Please work on
> unwinding the mess so that you don't need callbacks for locks,
> that is an abstraction that isn't needed.
Greg,
in this case these abstractions are not old layering. This is part of
scalable hashing code that we use all over Lustre, since it needs to
handle thousands/millions of clients/connections/files/locks/RPCs
or whatever in a lot of places. Having a single interface to define
and use these hash functions simplifies the code and avoids bugs,
like list_* functions do everywhere else in the kernel.
Depending on how the hash table is declared, it may have read/write
locks or normal spinlocks. The hash table size may be static, or it
may grow when the buckets get too full (since the numbers of items
being hashed may differ by many orders of magnitude on different filesystems) so the actual locking functions used depend on how the
hash table is set up.
I don't think it is possible to unwind the locking of cfs_hash_* code
since they are accessed via methods depending on the hash.
Cheers, Andreas
>>>> static inline void
>>>> cfs_hash_rw_lock(union cfs_hash_lock *lock, int exclusive)
>>>> + __acquires(&lock->rw)
>>>> {
>>>> if (!exclusive)
>>>> read_lock(&lock->rw);
>>>> @@ -147,6 +150,7 @@ cfs_hash_rw_lock(union cfs_hash_lock *lock, int exclusive)
>>>>
>>>> static inline void
>>>> cfs_hash_rw_unlock(union cfs_hash_lock *lock, int exclusive)
>>>> + __releases(&lock->rw)
>>>> {
>>>> if (!exclusive)
>>>> read_unlock(&lock->rw);
>>>
>>>
>>> Same for these.
>>
>> Likewise for cfs_hash_rw_lock() and cfs_hash_rw_unlock():
>>
>> 173 /** spin bucket lock, rehash is enabled */
>> 174 static cfs_hash_lock_ops_t cfs_hash_bkt_spin_lops = {
>> 175 .hs_lock = cfs_hash_rw_lock,
>> 176 .hs_unlock = cfs_hash_rw_unlock,
>> 177 .hs_bkt_lock = cfs_hash_spin_lock,
>> 178 .hs_bkt_unlock = cfs_hash_spin_unlock,
>> 179 };
>> 180
>> 181 /** rw bucket lock, rehash is enabled */
>> 182 static cfs_hash_lock_ops_t cfs_hash_bkt_rw_lops = {
>> 183 .hs_lock = cfs_hash_rw_lock,
>> 184 .hs_unlock = cfs_hash_rw_unlock,
>> 185 .hs_bkt_lock = cfs_hash_rw_lock,
>> 186 .hs_bkt_unlock = cfs_hash_rw_unlock,
>> 187 };
>
> Same here, ick ick ick.
>
>>>> diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
>>>> index 2c199c7..1e529fc 100644
>>>> --- a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
>>>> +++ b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
>>>> @@ -91,6 +91,7 @@ EXPORT_SYMBOL(cfs_percpt_lock_alloc);
>>>> */
>>>> void
>>>> cfs_percpt_lock(struct cfs_percpt_lock *pcl, int index)
>>>> + __acquires(pcl->pcl_locks[index])
>>>> {
>>>> int ncpt = cfs_cpt_number(pcl->pcl_cptab);
>>>> int i;
>>>> @@ -125,6 +126,7 @@ EXPORT_SYMBOL(cfs_percpt_lock);
>>>> /** unlock a CPU partition */
>>>> void
>>>> cfs_percpt_unlock(struct cfs_percpt_lock *pcl, int index)
>>>> + __releases(pcl->pcl_locks[index])
>>>> {
>>>> int ncpt = cfs_cpt_number(pcl->pcl_cptab);
>>>> int i;
>>>> diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
>>>> index 976c61e..257669b 100644
>>>> --- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
>>>> +++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
>>>> @@ -151,6 +151,7 @@ cfs_trace_buf_type_t cfs_trace_buf_idx_get(void)
>>>> * for details.
>>>> */
>>>> int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
>>>> + __acquires(&tcd->tc_lock)
>>>> {
>>>> __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
>>>> if (tcd->tcd_type == CFS_TCD_TYPE_IRQ)
>>>> @@ -165,6 +166,7 @@ int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
>>>> }
>>>>
>>>> void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
>>>> + __releases(&tcd->tcd_lock)
>>>> {
>>>> __LASSERT(tcd->tcd_type < CFS_TCD_TYPE_MAX);
>>>> if (tcd->tcd_type == CFS_TCD_TYPE_IRQ)
>>>> diff --git a/drivers/staging/lustre/lustre/obdclass/cl_object.c b/drivers/staging/lustre/lustre/obdclass/cl_object.c
>>>> index ce96bd2..8577f97 100644
>>>> --- a/drivers/staging/lustre/lustre/obdclass/cl_object.c
>>>> +++ b/drivers/staging/lustre/lustre/obdclass/cl_object.c
>>>> @@ -193,6 +193,7 @@ static spinlock_t *cl_object_attr_guard(struct cl_object *o)
>>>> * cl_object_attr_get(), cl_object_attr_set().
>>>> */
>>>> void cl_object_attr_lock(struct cl_object *o)
>>>> + __acquires(cl_object_attr_guard(o))
>>>> {
>>>> spin_lock(cl_object_attr_guard(o));
>>>> }
>>>> @@ -202,6 +203,7 @@ EXPORT_SYMBOL(cl_object_attr_lock);
>>>> * Releases data-attributes lock, acquired by cl_object_attr_lock().
>>>> */
>>>> void cl_object_attr_unlock(struct cl_object *o)
>>>> + __releases(cl_object_attr_guard(o))
>>>> {
>>>> spin_unlock(cl_object_attr_guard(o));
>>>> }
>>>
>>> Same thing here.
>>
>> These ones are easy to replace, but the naming scheme of all functions in cl_object.c is consistent,
>> from my point of view it ease code reading where they are called, for example in lustre/lustre/osc/osc_request.c:
>>
>> before:
>>
>> 1827 if (valid != 0) {
>> 1828 cl_object_attr_lock(obj);
>> 1829 cl_object_attr_set(env, obj, attr, valid);
>> 1830 cl_object_attr_unlock(obj);
>>
>> after:
>>
>> 1827 if (valid != 0) {
>> 1828 spin_lock(cl_object_attr_guard(obj));
>> 1829 cl_object_attr_set(env, obj, attr, valid);
>> 1830 spin_unlock(cl_object_attr_guard(obj));
>>
>>
>> But I'm here for learning, and I would be grateful to have your opinion.
>
> Don't hide "implementation of locks" in functions like this, it only
> causes problems. This code has layers of layers of layers of
> abstractions due to it wanting to be originally ported to other
> operating systems and lots of different kernel versions of Linux itself.
> Unwinding and removing those layers is a good thing to do, don't paper
> over the nonsense by putting sparse markings on pointless functions.
>
> thanks,
>
> greg k-h
Cheers, Andreas
6 years, 6 months
[PATCH v3] staging: lustre: fix sparse warning on LPROC_SEQ_FOPS macros
by Tristan Lelong
This patch fix a sparse warning in lustre sources
warning: incorrect type in argument 1 (different address spaces)
expected void [noderef] <asn:1>*to
got char *<noident>
This is done by adding the missing __user attribute on userland pointers inside the LPROC_SEQ_FOPS like macros:
- LPROC_SEQ_FOPS
- LPROC_SEQ_FOPS_RW_TYPE
- LPROC_SEQ_FOPS_WR_ONLY
- LDLM_POOL_PROC_WRITER
The patch also updates all the functions that are used by this macro:
- lprocfs_wr_*
- *_seq_write
as well as some helpers used by the previously modified functions (otherwise fixing the sparse warning add some new ones):
- lprocfs_write_frac_helper
- lprocfs_write_helper
- lprocfs_write_u64_helper
The patch also fixes one __user pointer direct dereference by strncmp in function fld_proc_hash_seq_write.
Signed-off-by: Tristan Lelong <tristan(a)lelong.xyz>
---
Changes in v2:
Use dynamic allocation for 'name' variable instead of having it on the stack, per Greg K-H suggestion.
Changes in v3:
Rename added variable from 'name' to 'fh_name'.
Revert to a stack declaration of 'fh_name' since it is not 80 bytes but only 8, per Andreas Dilger comment.
---
drivers/staging/lustre/lustre/fld/lproc_fld.c | 14 ++++--
.../staging/lustre/lustre/include/lprocfs_status.h | 44 +++++++++--------
drivers/staging/lustre/lustre/ldlm/ldlm_internal.h | 5 +-
drivers/staging/lustre/lustre/ldlm/ldlm_pool.c | 4 +-
drivers/staging/lustre/lustre/ldlm/ldlm_resource.c | 7 +--
drivers/staging/lustre/lustre/lov/lproc_lov.c | 20 +++++---
drivers/staging/lustre/lustre/mdc/lproc_mdc.c | 7 +--
.../lustre/lustre/obdclass/linux/linux-module.c | 5 +-
.../lustre/lustre/obdclass/lprocfs_status.c | 2 +-
drivers/staging/lustre/lustre/osc/lproc_osc.c | 57 +++++++++++++---------
.../staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c | 25 +++++-----
11 files changed, 114 insertions(+), 76 deletions(-)
diff --git a/drivers/staging/lustre/lustre/fld/lproc_fld.c b/drivers/staging/lustre/lustre/fld/lproc_fld.c
index 95e7de1..9b26bb5 100644
--- a/drivers/staging/lustre/lustre/fld/lproc_fld.c
+++ b/drivers/staging/lustre/lustre/fld/lproc_fld.c
@@ -87,13 +87,21 @@ fld_proc_hash_seq_show(struct seq_file *m, void *unused)
}
static ssize_t
-fld_proc_hash_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+fld_proc_hash_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct lu_client_fld *fld;
struct lu_fld_hash *hash = NULL;
+ char fh_name[8];
int i;
+ if (count > sizeof(fh_name))
+ return -ENAMETOOLONG;
+
+ if (copy_from_user(fh_name, buffer, count) != 0)
+ return -EFAULT;
+
fld = ((struct seq_file *)file->private_data)->private;
LASSERT(fld != NULL);
@@ -101,7 +109,7 @@ fld_proc_hash_seq_write(struct file *file, const char *buffer,
if (count != strlen(fld_hash[i].fh_name))
continue;
- if (!strncmp(fld_hash[i].fh_name, buffer, count)) {
+ if (!strncmp(fld_hash[i].fh_name, fh_name, count)) {
hash = &fld_hash[i];
break;
}
diff --git a/drivers/staging/lustre/lustre/include/lprocfs_status.h b/drivers/staging/lustre/lustre/include/lprocfs_status.h
index cfe503b..8a25cf6 100644
--- a/drivers/staging/lustre/lustre/include/lprocfs_status.h
+++ b/drivers/staging/lustre/lustre/include/lprocfs_status.h
@@ -627,16 +627,16 @@ struct adaptive_timeout;
extern int lprocfs_at_hist_helper(struct seq_file *m,
struct adaptive_timeout *at);
extern int lprocfs_rd_timeouts(struct seq_file *m, void *data);
-extern int lprocfs_wr_timeouts(struct file *file, const char *buffer,
+extern int lprocfs_wr_timeouts(struct file *file, const char __user *buffer,
unsigned long count, void *data);
-extern int lprocfs_wr_evict_client(struct file *file, const char *buffer,
+extern int lprocfs_wr_evict_client(struct file *file, const char __user *buffer,
size_t count, loff_t *off);
-extern int lprocfs_wr_ping(struct file *file, const char *buffer,
+extern int lprocfs_wr_ping(struct file *file, const char __user *buffer,
size_t count, loff_t *off);
-extern int lprocfs_wr_import(struct file *file, const char *buffer,
+extern int lprocfs_wr_import(struct file *file, const char __user *buffer,
size_t count, loff_t *off);
extern int lprocfs_rd_pinger_recov(struct seq_file *m, void *n);
-extern int lprocfs_wr_pinger_recov(struct file *file, const char *buffer,
+extern int lprocfs_wr_pinger_recov(struct file *file, const char __user *buffer,
size_t count, loff_t *off);
/* Statfs helpers */
@@ -650,8 +650,8 @@ extern int lprocfs_rd_filesfree(struct seq_file *m, void *data);
extern int lprocfs_write_helper(const char __user *buffer, unsigned long count,
int *val);
extern int lprocfs_seq_read_frac_helper(struct seq_file *m, long val, int mult);
-extern int lprocfs_write_u64_helper(const char *buffer, unsigned long count,
- __u64 *val);
+extern int lprocfs_write_u64_helper(const char __user *buffer,
+ unsigned long count, __u64 *val);
extern int lprocfs_write_frac_u64_helper(const char *buffer,
unsigned long count,
__u64 *val, int mult);
@@ -716,7 +716,8 @@ static struct file_operations name##_fops = { \
return lprocfs_rd_##type(m, m->private); \
} \
static ssize_t name##_##type##_seq_write(struct file *file, \
- const char *buffer, size_t count, loff_t *off) \
+ const char __user *buffer, size_t count, \
+ loff_t *off) \
{ \
struct seq_file *seq = file->private_data; \
return lprocfs_wr_##type(file, buffer, \
@@ -726,7 +727,8 @@ static struct file_operations name##_fops = { \
#define LPROC_SEQ_FOPS_WR_ONLY(name, type) \
static ssize_t name##_##type##_write(struct file *file, \
- const char *buffer, size_t count, loff_t *off) \
+ const char __user *buffer, size_t count, \
+ loff_t *off) \
{ \
return lprocfs_wr_##type(file, buffer, count, off); \
} \
@@ -939,20 +941,24 @@ static inline int lprocfs_at_hist_helper(struct seq_file *m,
static inline int lprocfs_rd_timeouts(struct seq_file *m, void *data)
{ return 0; }
static inline int lprocfs_wr_timeouts(struct file *file,
- const char *buffer,
- unsigned long count, void *data)
+ const char __user *buffer,
+ unsigned long count, void *data)
{ return 0; }
-static inline int lprocfs_wr_evict_client(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static inline int lprocfs_wr_evict_client(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{ return 0; }
-static inline int lprocfs_wr_ping(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static inline int lprocfs_wr_ping(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{ return 0; }
-static inline int lprocfs_wr_import(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static inline int lprocfs_wr_import(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{ return 0; }
-static inline int lprocfs_wr_pinger_recov(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static inline int lprocfs_wr_pinger_recov(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{ return 0; }
/* Statfs helpers */
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h b/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h
index 6c6c57c..20e64cd 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h
@@ -249,8 +249,9 @@ typedef enum ldlm_policy_res ldlm_policy_res_t;
struct __##var##__dummy_read {; } /* semicolon catcher */
#define LDLM_POOL_PROC_WRITER(var, type) \
- static int lprocfs_wr_##var(struct file *file, const char *buffer, \
- unsigned long count, void *data) \
+ static int lprocfs_wr_##var(struct file *file, \
+ const char __user *buffer, \
+ unsigned long count, void *data) \
{ \
struct ldlm_pool *pl = data; \
type tmp; \
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
index 4c838f6..142b3dd 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
@@ -697,8 +697,8 @@ LPROC_SEQ_FOPS_RO(lprocfs_grant_plan);
LDLM_POOL_PROC_READER_SEQ_SHOW(recalc_period, int);
LDLM_POOL_PROC_WRITER(recalc_period, int);
static ssize_t lprocfs_recalc_period_seq_write(struct file *file,
- const char *buf, size_t len,
- loff_t *off)
+ const char __user *buf,
+ size_t len, loff_t *off)
{
struct seq_file *seq = file->private_data;
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
index 1f150e4..c6f62a9 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
@@ -72,7 +72,7 @@ extern unsigned int ldlm_cancel_unused_locks_before_replay;
unsigned int ldlm_dump_granted_max = 256;
#if defined(CONFIG_PROC_FS)
-static ssize_t lprocfs_wr_dump_ns(struct file *file, const char *buffer,
+static ssize_t lprocfs_wr_dump_ns(struct file *file, const char __user *buffer,
size_t count, loff_t *off)
{
ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
@@ -287,8 +287,9 @@ static int lprocfs_elc_seq_show(struct seq_file *m, void *v)
return lprocfs_rd_uint(m, &supp);
}
-static ssize_t lprocfs_elc_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t lprocfs_elc_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct ldlm_namespace *ns = ((struct seq_file *)file->private_data)->private;
unsigned int supp = -1;
diff --git a/drivers/staging/lustre/lustre/lov/lproc_lov.c b/drivers/staging/lustre/lustre/lov/lproc_lov.c
index c993f25..c99f2f4 100644
--- a/drivers/staging/lustre/lustre/lov/lproc_lov.c
+++ b/drivers/staging/lustre/lustre/lov/lproc_lov.c
@@ -51,8 +51,9 @@ static int lov_stripesize_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%llu\n", desc->ld_default_stripe_size);
}
-static ssize_t lov_stripesize_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t lov_stripesize_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
struct lov_desc *desc;
@@ -81,8 +82,9 @@ static int lov_stripeoffset_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%llu\n", desc->ld_default_stripe_offset);
}
-static ssize_t lov_stripeoffset_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t lov_stripeoffset_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
struct lov_desc *desc;
@@ -110,8 +112,9 @@ static int lov_stripetype_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%u\n", desc->ld_pattern);
}
-static ssize_t lov_stripetype_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t lov_stripetype_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
struct lov_desc *desc;
@@ -140,8 +143,9 @@ static int lov_stripecount_seq_show(struct seq_file *m, void *v)
(__s16)(desc->ld_default_stripe_count + 1) - 1);
}
-static ssize_t lov_stripecount_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t lov_stripecount_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
struct lov_desc *desc;
diff --git a/drivers/staging/lustre/lustre/mdc/lproc_mdc.c b/drivers/staging/lustre/lustre/mdc/lproc_mdc.c
index 16341c8..c420219 100644
--- a/drivers/staging/lustre/lustre/mdc/lproc_mdc.c
+++ b/drivers/staging/lustre/lustre/mdc/lproc_mdc.c
@@ -52,7 +52,7 @@ static int mdc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
}
static ssize_t mdc_max_rpcs_in_flight_seq_write(struct file *file,
- const char *buffer,
+ const char __user *buffer,
size_t count,
loff_t *off)
{
@@ -82,8 +82,9 @@ static int mdc_kuc_open(struct inode *inode, struct file *file)
}
/* temporary for testing */
-static ssize_t mdc_kuc_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t mdc_kuc_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *obd =
((struct seq_file *)file->private_data)->private;
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
index 66ceab2..b5007b8 100644
--- a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
@@ -272,8 +272,9 @@ static int obd_proc_jobid_var_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%s\n", obd_jobid_var);
}
-static ssize_t obd_proc_jobid_var_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t obd_proc_jobid_var_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
if (!count || count > JOBSTATS_JOBID_VAR_MAX_LEN)
return -EINVAL;
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
index 3b7dfc3..f78a241 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
@@ -1849,7 +1849,7 @@ int lprocfs_seq_read_frac_helper(struct seq_file *m, long val, int mult)
}
EXPORT_SYMBOL(lprocfs_seq_read_frac_helper);
-int lprocfs_write_u64_helper(const char *buffer, unsigned long count,
+int lprocfs_write_u64_helper(const char __user *buffer, unsigned long count,
__u64 *val)
{
return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
diff --git a/drivers/staging/lustre/lustre/osc/lproc_osc.c b/drivers/staging/lustre/lustre/osc/lproc_osc.c
index 9f719bc..8e22e45 100644
--- a/drivers/staging/lustre/lustre/osc/lproc_osc.c
+++ b/drivers/staging/lustre/lustre/osc/lproc_osc.c
@@ -53,8 +53,9 @@ static int osc_active_seq_show(struct seq_file *m, void *v)
return rc;
}
-static ssize_t osc_active_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t osc_active_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
int val, rc;
@@ -88,7 +89,8 @@ static int osc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
}
static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file,
- const char *buffer, size_t count, loff_t *off)
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
struct client_obd *cli = &dev->u.cli;
@@ -130,8 +132,9 @@ static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
return lprocfs_seq_read_frac_helper(m, val, mult);
}
-static ssize_t osc_max_dirty_mb_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t osc_max_dirty_mb_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
struct client_obd *cli = &dev->u.cli;
@@ -233,8 +236,9 @@ static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v)
return rc;
}
-static ssize_t osc_cur_grant_bytes_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t osc_cur_grant_bytes_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
struct client_obd *cli = &obd->u.cli;
@@ -290,7 +294,8 @@ static int osc_grant_shrink_interval_seq_show(struct seq_file *m, void *v)
}
static ssize_t osc_grant_shrink_interval_seq_write(struct file *file,
- const char *buffer, size_t count, loff_t *off)
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
int val, rc;
@@ -322,8 +327,9 @@ static int osc_checksum_seq_show(struct seq_file *m, void *v)
obd->u.cli.cl_checksum ? 1 : 0);
}
-static ssize_t osc_checksum_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t osc_checksum_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
int val, rc;
@@ -362,7 +368,8 @@ static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
return 0;
}
-static ssize_t osc_checksum_type_seq_write(struct file *file, const char *buffer,
+static ssize_t osc_checksum_type_seq_write(struct file *file,
+ const char __user *buffer,
size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
@@ -401,8 +408,9 @@ static int osc_resend_count_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends));
}
-static ssize_t osc_resend_count_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t osc_resend_count_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
int val, rc;
@@ -428,8 +436,9 @@ static int osc_contention_seconds_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%u\n", od->od_contention_time);
}
-static ssize_t osc_contention_seconds_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t osc_contention_seconds_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
struct osc_device *od = obd2osc_dev(obd);
@@ -447,8 +456,9 @@ static int osc_lockless_truncate_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%u\n", od->od_lockless_truncate);
}
-static ssize_t osc_lockless_truncate_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t osc_lockless_truncate_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
struct osc_device *od = obd2osc_dev(obd);
@@ -472,7 +482,8 @@ static int osc_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *v)
}
static ssize_t osc_obd_max_pages_per_rpc_seq_write(struct file *file,
- const char *buffer, size_t count, loff_t *off)
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
struct client_obd *cli = &dev->u.cli;
@@ -664,8 +675,9 @@ static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
}
#undef pct
-static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
- size_t len, loff_t *off)
+static ssize_t osc_rpc_stats_seq_write(struct file *file,
+ const char __user *buf,
+ size_t len, loff_t *off)
{
struct seq_file *seq = file->private_data;
struct obd_device *dev = seq->private;
@@ -702,8 +714,9 @@ static int osc_stats_seq_show(struct seq_file *seq, void *v)
return 0;
}
-static ssize_t osc_stats_seq_write(struct file *file, const char *buf,
- size_t len, loff_t *off)
+static ssize_t osc_stats_seq_write(struct file *file,
+ const char __user *buf,
+ size_t len, loff_t *off)
{
struct seq_file *seq = file->private_data;
struct obd_device *dev = seq->private;
diff --git a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
index 4011e00..7b22afd 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
@@ -284,8 +284,9 @@ ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
}
static ssize_t
-ptlrpc_lprocfs_req_history_max_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+ptlrpc_lprocfs_req_history_max_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
int bufpages;
@@ -329,8 +330,9 @@ ptlrpc_lprocfs_threads_min_seq_show(struct seq_file *m, void *n)
}
static ssize_t
-ptlrpc_lprocfs_threads_min_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+ptlrpc_lprocfs_threads_min_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
int val;
@@ -381,8 +383,9 @@ ptlrpc_lprocfs_threads_max_seq_show(struct seq_file *m, void *n)
}
static ssize_t
-ptlrpc_lprocfs_threads_max_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+ptlrpc_lprocfs_threads_max_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
int val;
@@ -1025,7 +1028,7 @@ static int ptlrpc_lprocfs_hp_ratio_seq_show(struct seq_file *m, void *v)
}
static ssize_t ptlrpc_lprocfs_hp_ratio_seq_write(struct file *file,
- const char *buffer,
+ const char __user *buffer,
size_t count,
loff_t *off)
{
@@ -1175,7 +1178,7 @@ EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
#define BUFLEN (UUID_MAX + 5)
-int lprocfs_wr_evict_client(struct file *file, const char *buffer,
+int lprocfs_wr_evict_client(struct file *file, const char __user *buffer,
size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
@@ -1223,7 +1226,7 @@ EXPORT_SYMBOL(lprocfs_wr_evict_client);
#undef BUFLEN
-int lprocfs_wr_ping(struct file *file, const char *buffer,
+int lprocfs_wr_ping(struct file *file, const char __user *buffer,
size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
@@ -1251,7 +1254,7 @@ EXPORT_SYMBOL(lprocfs_wr_ping);
* The connection UUID is a node's primary NID. For example,
* "echo connection=192.168.0.1@tcp0::instance > .../import".
*/
-int lprocfs_wr_import(struct file *file, const char *buffer,
+int lprocfs_wr_import(struct file *file, const char __user *buffer,
size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
@@ -1329,7 +1332,7 @@ int lprocfs_rd_pinger_recov(struct seq_file *m, void *n)
}
EXPORT_SYMBOL(lprocfs_rd_pinger_recov);
-int lprocfs_wr_pinger_recov(struct file *file, const char *buffer,
+int lprocfs_wr_pinger_recov(struct file *file, const char __user *buffer,
size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
--
2.1.1
6 years, 6 months
[PATCH] staging: lustre: do not ignore try_module_get() fail in obd_class_open()
by Alexey Khoroshilov
obd_class_open() ignores error code of try_module_get(),
while it can lead to race with module unload.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov(a)ispras.ru>
---
drivers/staging/lustre/lustre/obdclass/linux/linux-module.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
index 66ceab20c743..bb4bc72ddac7 100644
--- a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
@@ -168,8 +168,7 @@ EXPORT_SYMBOL(obd_ioctl_popdata);
/* opening /dev/obd */
static int obd_class_open(struct inode *inode, struct file *file)
{
- try_module_get(THIS_MODULE);
- return 0;
+ return try_module_get(THIS_MODULE);
}
/* closing /dev/obd */
--
1.9.1
6 years, 6 months
[PATCH] staging: lustre: Fix the warning messages about casting without __user macro
by Shalin Mehta
From: Shalin Mehta <shalinmehta85(a)gmail.com>
This issue is showed up while compiling with sparse. The iov_base in struct iovec struct explicitly declares that the assigned value should be user space pointer with __user macro. Where as here, the __user macro isn't used while casting.
Signed-off-by: Shalin Mehta <shalinmehta85(a)gmail.com>
---
drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
index d29f5f1..c40b7e0 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
@@ -131,7 +131,7 @@ ksocknal_send_iov (ksock_conn_t *conn, ksock_tx_t *tx)
LASSERT (tx->tx_niov > 0);
if (nob < (int) iov->iov_len) {
- iov->iov_base = (void *)((char *)iov->iov_base + nob);
+ iov->iov_base = (void __user *)((char __user *)iov->iov_base + nob);
iov->iov_len -= nob;
return rc;
}
@@ -1052,7 +1052,7 @@ ksocknal_new_packet (ksock_conn_t *conn, int nob_to_skip)
case KSOCK_PROTO_V3:
conn->ksnc_rx_state = SOCKNAL_RX_KSM_HEADER;
conn->ksnc_rx_iov = (struct iovec *)&conn->ksnc_rx_iov_space;
- conn->ksnc_rx_iov[0].iov_base = (char *)&conn->ksnc_msg;
+ conn->ksnc_rx_iov[0].iov_base = (char __user *)&conn->ksnc_msg;
conn->ksnc_rx_nob_wanted = offsetof(ksock_msg_t, ksm_u);
conn->ksnc_rx_nob_left = offsetof(ksock_msg_t, ksm_u);
@@ -1066,7 +1066,7 @@ ksocknal_new_packet (ksock_conn_t *conn, int nob_to_skip)
conn->ksnc_rx_nob_left = sizeof(lnet_hdr_t);
conn->ksnc_rx_iov = (struct iovec *)&conn->ksnc_rx_iov_space;
- conn->ksnc_rx_iov[0].iov_base = (char *)&conn->ksnc_msg.ksm_u.lnetmsg;
+ conn->ksnc_rx_iov[0].iov_base = (char __user *)&conn->ksnc_msg.ksm_u.lnetmsg;
conn->ksnc_rx_iov[0].iov_len = sizeof (lnet_hdr_t);
break;
@@ -1093,7 +1093,7 @@ ksocknal_new_packet (ksock_conn_t *conn, int nob_to_skip)
do {
nob = MIN (nob_to_skip, sizeof (ksocknal_slop_buffer));
- conn->ksnc_rx_iov[niov].iov_base = ksocknal_slop_buffer;
+ conn->ksnc_rx_iov[niov].iov_base = (void __user *)ksocknal_slop_buffer;
conn->ksnc_rx_iov[niov].iov_len = nob;
niov++;
skipped += nob;
@@ -1218,7 +1218,7 @@ ksocknal_process_receive (ksock_conn_t *conn)
conn->ksnc_rx_nob_left = sizeof(ksock_lnet_msg_t);
conn->ksnc_rx_iov = (struct iovec *)&conn->ksnc_rx_iov_space;
- conn->ksnc_rx_iov[0].iov_base = (char *)&conn->ksnc_msg.ksm_u.lnetmsg;
+ conn->ksnc_rx_iov[0].iov_base = (char __user *)&conn->ksnc_msg.ksm_u.lnetmsg;
conn->ksnc_rx_iov[0].iov_len = sizeof(ksock_lnet_msg_t);
conn->ksnc_rx_niov = 1;
--
1.9.1
6 years, 6 months
quotas on 2.4.3
by Matt Bettinger
Hello,
We have a fresh 2.4.3 lustre upgrade that is not yet put into
production running on rhel 6.4.
We would like to take a look at quotas but looks like there is some
major performance problems with 1.8.9 clients.
Here is how I enabled quotas
[root@lfs-mds-0-0 ~]# lctl conf_param lustre2.quota.mdt=ug
[root@lfs-mds-0-0 ~]# lctl conf_param lustre2.quota.ost=ug
[root@lfs-mds-0-0 ~]# lctl get_param osd-*.*.quota_slave.info
osd-ldiskfs.lustre2-MDT0000.quota_slave.info=
target name: lustre2-MDT0000
pool ID: 0
type: md
quota enabled: ug
conn to master: setup
space acct: ug
user uptodate: glb[1],slv[1],reint[0]
group uptodate: glb[1],slv[1],reint[0]
The quotas seem to be working however the write performance from
1.8.9wc client to 2.4.3 with quotas on is horrific. Am I not setting
quotas up correctly?
I try to make a simple user quota on /lustre2/mattb/300MB_QUOTA directory
[root@hous0036 mattb]# lfs setquota -u l0363734 -b 307200 -B 309200 -i
10000 -I 11000 /lustre2/mattb/300MB_QUOTA/
See quota change is in effect...
[root@hous0036 mattb]# lfs quota -u l0363734 /lustre2/mattb/300MB_QUOTA/
Disk quotas for user l0363734 (uid 1378):
Filesystem kbytes quota limit grace files quota limit grace
/lustre2/mattb/300MB_QUOTA/
310292* 307200 309200 - 4 10000 11000 -
Try and write to quota directory as the user but get horrible write speed
[l0363734@hous0036 300MB_QUOTA]$ dd if=/dev/zero of=301MB_FILE bs=1M count=301
301+0 records in
301+0 records out
315621376 bytes (316 MB) copied, 61.7426 seconds, 5.1 MB/s
Try file number 2 and then quota take effect, so it seems.
[l0363734@hous0036 300MB_QUOTA]$ dd if=/dev/zero of=301MB_FILE2 bs=1M count=301
dd: writing `301MB_FILE2': Disk quota exceeded
dd: closing output file `301MB_FILE2': Input/output error
If I disable quotas using
[root@lfs-mds-0-0 ~]# lctl conf_param lustre2.quota.mdt=none
[root@lfs-mds-0-0 ~]# lctl conf_param lustre2.quota.oss=none
Then try and write the same file the speeds are more like we expect
but then can't use quotas.
[l0363734@hous0036 300MB_QUOTA]$ dd if=/dev/zero of=301MB_FILE2 bs=1M count=301
301+0 records in
301+0 records out
315621376 bytes (316 MB) copied, 0.965009 seconds, 327 MB/s
[l0363734@hous0036 300MB_QUOTA]$ dd if=/dev/zero of=301MB_FILE2 bs=1M count=301
I have not tried this with a 2.4 client, yet since all of our nodes
are 1.8.X until we rebuild our images.
I was going by the manual on
http://build.whamcloud.com/job/lustre-manual/lastSuccessfulBuild/artifact...
but it looks like I am running into interoperability issue (which I
thought I fixed by using 1.8.9-wc client) or just not configuring
this correctly.
Thanks!
MB
6 years, 6 months
[PATCH] staging: lustre: lustre: include: lustre_update.h: Fix for possible null pointer dereference
by Rickard Strandqvist
The NULL check was done to late, and there it was a risk
of a possible null pointer dereference.
This was partially found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist(a)spectrumdigital.se>
---
drivers/staging/lustre/lustre/include/lustre_update.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/lustre/lustre/include/lustre_update.h b/drivers/staging/lustre/lustre/include/lustre_update.h
index 84defce..00e1361 100644
--- a/drivers/staging/lustre/lustre/include/lustre_update.h
+++ b/drivers/staging/lustre/lustre/include/lustre_update.h
@@ -165,12 +165,14 @@ static inline int update_get_reply_buf(struct update_reply *reply, void **buf,
int result;
ptr = update_get_buf_internal(reply, index, &size);
+
+ LASSERT((ptr != NULL && size >= sizeof(int)));
+
result = *(int *)ptr;
if (result < 0)
return result;
- LASSERT((ptr != NULL && size >= sizeof(int)));
*buf = ptr + sizeof(int);
return size - sizeof(int);
}
--
1.7.10.4
6 years, 6 months
[PATCH v3] staging: lustre: libcfs: fix sparse warnings about static declaration
by Serguey Parkhomovsky
Fixes the following sparse warnings:
drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c:198:1: warning:
symbol 'libcfs_arch_init' was not declared. Should it be static?
drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c:204:1: warning:
symbol 'libcfs_arch_cleanup' was not declared. Should it be static?
Signed-off-by: Serguey Parkhomovsky <sergueyparkhomovsky(a)gmail.com>
---
v3: Wrap commit message at 72 cols, and remove filename from subject line.
v2: Don't break the build, and fix the warnings by defining the functions in libcfs.h.
drivers/staging/lustre/include/linux/libcfs/libcfs.h | 3 +++
drivers/staging/lustre/lustre/libcfs/module.c | 2 --
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs.h b/drivers/staging/lustre/include/linux/libcfs/libcfs.h
index a6b2f90..4410d7f 100644
--- a/drivers/staging/lustre/include/linux/libcfs/libcfs.h
+++ b/drivers/staging/lustre/include/linux/libcfs/libcfs.h
@@ -85,6 +85,9 @@ static inline int __is_po2(unsigned long long val)
#include <linux/list.h>
+int libcfs_arch_init(void);
+void libcfs_arch_cleanup(void);
+
/* libcfs tcpip */
int libcfs_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
int libcfs_ipif_enumerate(char ***names);
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index 2c4fc74..31a4d19 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -334,8 +334,6 @@ extern struct mutex cfs_trace_thread_mutex;
extern struct cfs_wi_sched *cfs_sched_rehash;
extern void libcfs_init_nidstrings(void);
-extern int libcfs_arch_init(void);
-extern void libcfs_arch_cleanup(void);
static int init_libcfs_module(void)
{
--
1.9.3
6 years, 6 months
[PATCH v2] staging: lustre: linux-prim.c: fix sparse warnings about static declaration
by Serguey Parkhomovsky
Fixes the following sparse warnings:
drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c:198:1: warning: symbol 'libcfs_arch_init' was not declared. Should it be static?
drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c:204:1: warning: symbol 'libcfs_arch_cleanup' was not declared. Should it be static?
Signed-off-by: Serguey Parkhomovsky <sergueyparkhomovsky(a)gmail.com>
---
v2: Don't break the build, and fix the warnings by defining the functions in libcfs.h.
drivers/staging/lustre/include/linux/libcfs/libcfs.h | 3 +++
drivers/staging/lustre/lustre/libcfs/module.c | 2 --
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs.h b/drivers/staging/lustre/include/linux/libcfs/libcfs.h
index a6b2f90..4410d7f 100644
--- a/drivers/staging/lustre/include/linux/libcfs/libcfs.h
+++ b/drivers/staging/lustre/include/linux/libcfs/libcfs.h
@@ -85,6 +85,9 @@ static inline int __is_po2(unsigned long long val)
#include <linux/list.h>
+int libcfs_arch_init(void);
+void libcfs_arch_cleanup(void);
+
/* libcfs tcpip */
int libcfs_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
int libcfs_ipif_enumerate(char ***names);
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index 2c4fc74..31a4d19 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -334,8 +334,6 @@ extern struct mutex cfs_trace_thread_mutex;
extern struct cfs_wi_sched *cfs_sched_rehash;
extern void libcfs_init_nidstrings(void);
-extern int libcfs_arch_init(void);
-extern void libcfs_arch_cleanup(void);
static int init_libcfs_module(void)
{
--
1.9.3
6 years, 6 months
[PATCH] staging: lustre: linux-prim.c: fix sparse warnings about static declaration
by Serguey Parkhomovsky
Fixes the following sparse warnings:
drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c:198:1: warning: symbol 'libcfs_arch_init' was not declared. Should it be static?
drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c:204:1: warning: symbol 'libcfs_arch_cleanup' was not declared. Should it be static?
Signed-off-by: Serguey Parkhomovsky <sergueyparkhomovsky(a)gmail.com>
---
drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c
index 19f405e..4fee73f 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c
@@ -194,14 +194,12 @@ cfs_clear_sigpending(void)
spin_unlock_irqrestore(¤t->sighand->siglock, flags);
}
-int
-libcfs_arch_init(void)
+static int libcfs_arch_init(void)
{
return 0;
}
-void
-libcfs_arch_cleanup(void)
+static void libcfs_arch_cleanup(void)
{
return;
}
--
1.9.3
6 years, 6 months