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NFS client bugfixes for Linux 4.14

Browse Source 
Hightlights include:
 
 bugfixes:
 - Various changes relating to reporting IO errors.
 - pnfs: Use the standard I/O stateid when calling LAYOUTGET
 
 Features:
 - Add static NFS I/O tracepoints for debugging
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Merge tag 'nfs-for-4.14-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull more NFS client updates from Trond Myklebust:
 "Hightlights include:

  Bugfixes:
   - Various changes relating to reporting IO errors.
   - pnfs: Use the standard I/O stateid when calling LAYOUTGET

  Features:
   - Add static NFS I/O tracepoints for debugging"

* tag 'nfs-for-4.14-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFS: various changes relating to reporting IO errors.
  NFS: Add static NFS I/O tracepoints
  pNFS: Use the standard I/O stateid when calling LAYOUTGET
This commit is contained in:
Linus Torvalds 2017-09-14 20:04:32 -07:00
commit 6ed0529fef
7 changed files with 287 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
fs/nfs/file.c
View File

@ -208,21 +208,19 @@ EXPORT_SYMBOL_GPL(nfs_file_mmap);
* fall back to doing a synchronous write.
*/
static int
nfs_file_fsync_commit(struct file *file, loff_t start, loff_t end, int datasync)
nfs_file_fsync_commit(struct file *file, int datasync)
{
struct nfs_open_context *ctx = nfs_file_open_context(file);
struct inode *inode = file_inode(file);
int have_error, do_resend, status;
int do_resend, status;
int ret = 0;
dprintk("NFS: fsync file(%pD2) datasync %d\n", file, datasync);
nfs_inc_stats(inode, NFSIOS_VFSFSYNC);
do_resend = test_and_clear_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags);
have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
status = nfs_commit_inode(inode, FLUSH_SYNC);
have_error |= test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
if (have_error) {
if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags)) {
ret = xchg(&ctx->error, 0);
if (ret)
goto out;
@ -247,10 +245,16 @@ nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
trace_nfs_fsync_enter(inode);
do {
struct nfs_open_context *ctx = nfs_file_open_context(file);
ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags)) {
int ret2 = xchg(&ctx->error, 0);
if (ret2)
ret = ret2;
}
if (ret != 0)
break;
ret = nfs_file_fsync_commit(file, start, end, datasync);
ret = nfs_file_fsync_commit(file, datasync);
if (!ret)
ret = pnfs_sync_inode(inode, !!datasync);
/*

7
fs/nfs/internal.h
View File

@ -768,3 +768,10 @@ static inline bool nfs_error_is_fatal(int err)
return false;
}
}
static inline void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
{
ctx->error = error;
smp_wmb();
set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
}

248
fs/nfs/nfstrace.h
View File

@ -719,6 +719,254 @@ TRACE_EVENT(nfs_sillyrename_unlink,
__get_str(name)
)
);
TRACE_EVENT(nfs_initiate_read,
TP_PROTO(
const struct inode *inode,
loff_t offset, unsigned long count
),
TP_ARGS(inode, offset, count),
TP_STRUCT__entry(
__field(loff_t, offset)
__field(unsigned long, count)
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
),
TP_fast_assign(
const struct nfs_inode *nfsi = NFS_I(inode);
__entry->offset = offset;
__entry->count = count;
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = nfsi->fileid;
__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
),
TP_printk(
"fileid=%02x:%02x:%llu fhandle=0x%08x "
"offset=%lld count=%lu",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle,
__entry->offset, __entry->count
)
);
TRACE_EVENT(nfs_readpage_done,
TP_PROTO(
const struct inode *inode,
int status, loff_t offset, bool eof
),
TP_ARGS(inode, status, offset, eof),
TP_STRUCT__entry(
__field(int, status)
__field(loff_t, offset)
__field(bool, eof)
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
),
TP_fast_assign(
const struct nfs_inode *nfsi = NFS_I(inode);
__entry->status = status;
__entry->offset = offset;
__entry->eof = eof;
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = nfsi->fileid;
__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
),
TP_printk(
"fileid=%02x:%02x:%llu fhandle=0x%08x "
"offset=%lld status=%d%s",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle,
__entry->offset, __entry->status,
__entry->eof ? " eof" : ""
)
);
/*
* XXX: I tried using NFS_UNSTABLE and friends in this table, but they
* all evaluate to 0 for some reason, even if I include linux/nfs.h.
*/
#define nfs_show_stable(stable) \
__print_symbolic(stable, \
{ 0, " (UNSTABLE)" }, \
{ 1, " (DATA_SYNC)" }, \
{ 2, " (FILE_SYNC)" })
TRACE_EVENT(nfs_initiate_write,
TP_PROTO(
const struct inode *inode,
loff_t offset, unsigned long count,
enum nfs3_stable_how stable
),
TP_ARGS(inode, offset, count, stable),
TP_STRUCT__entry(
__field(loff_t, offset)
__field(unsigned long, count)
__field(enum nfs3_stable_how, stable)
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
),
TP_fast_assign(
const struct nfs_inode *nfsi = NFS_I(inode);
__entry->offset = offset;
__entry->count = count;
__entry->stable = stable;
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = nfsi->fileid;
__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
),
TP_printk(
"fileid=%02x:%02x:%llu fhandle=0x%08x "
"offset=%lld count=%lu stable=%d%s",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle,
__entry->offset, __entry->count,
__entry->stable, nfs_show_stable(__entry->stable)
)
);
TRACE_EVENT(nfs_writeback_done,
TP_PROTO(
const struct inode *inode,
int status,
loff_t offset,
struct nfs_writeverf *writeverf
),
TP_ARGS(inode, status, offset, writeverf),
TP_STRUCT__entry(
__field(int, status)
__field(loff_t, offset)
__field(enum nfs3_stable_how, stable)
__field(unsigned long long, verifier)
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
),
TP_fast_assign(
const struct nfs_inode *nfsi = NFS_I(inode);
__entry->status = status;
__entry->offset = offset;
__entry->stable = writeverf->committed;
memcpy(&__entry->verifier, &writeverf->verifier,
sizeof(__entry->verifier));
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = nfsi->fileid;
__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
),
TP_printk(
"fileid=%02x:%02x:%llu fhandle=0x%08x "
"offset=%lld status=%d stable=%d%s "
"verifier 0x%016llx",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle,
__entry->offset, __entry->status,
__entry->stable, nfs_show_stable(__entry->stable),
__entry->verifier
)
);
TRACE_EVENT(nfs_initiate_commit,
TP_PROTO(
const struct nfs_commit_data *data
),
TP_ARGS(data),
TP_STRUCT__entry(
__field(loff_t, offset)
__field(unsigned long, count)
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
),
TP_fast_assign(
const struct inode *inode = data->inode;
const struct nfs_inode *nfsi = NFS_I(inode);
__entry->offset = data->args.offset;
__entry->count = data->args.count;
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = nfsi->fileid;
__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
),
TP_printk(
"fileid=%02x:%02x:%llu fhandle=0x%08x "
"offset=%lld count=%lu",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle,
__entry->offset, __entry->count
)
);
TRACE_EVENT(nfs_commit_done,
TP_PROTO(
const struct nfs_commit_data *data
),
TP_ARGS(data),
TP_STRUCT__entry(
__field(int, status)
__field(loff_t, offset)
__field(unsigned long long, verifier)
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
),
TP_fast_assign(
const struct inode *inode = data->inode;
const struct nfs_inode *nfsi = NFS_I(inode);
__entry->status = data->res.op_status;
__entry->offset = data->args.offset;
memcpy(&__entry->verifier, &data->verf.verifier,
sizeof(__entry->verifier));
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = nfsi->fileid;
__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
),
TP_printk(
"fileid=%02x:%02x:%llu fhandle=0x%08x "
"offset=%lld status=%d verifier 0x%016llx",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle,
__entry->offset, __entry->status,
__entry->verifier
)
);
#endif /* _TRACE_NFS_H */
#undef TRACE_INCLUDE_PATH

4
fs/nfs/pagelist.c
View File

@ -1170,8 +1170,8 @@ out_failed:
/* remember fatal errors */
if (nfs_error_is_fatal(desc->pg_error))
mapping_set_error(desc->pg_inode->i_mapping,
desc->pg_error);
nfs_context_set_write_error(req->wb_context,
desc->pg_error);
func = desc->pg_completion_ops->error_cleanup;
for (midx = 0; midx < desc->pg_mirror_count; midx++) {

14
fs/nfs/pnfs.c
View File

@ -1664,7 +1664,7 @@ pnfs_update_layout(struct inode *ino,
.offset = pos,
.length = count,
};
unsigned pg_offset, seq;
unsigned pg_offset;
struct nfs_server *server = NFS_SERVER(ino);
struct nfs_client *clp = server->nfs_client;
struct pnfs_layout_hdr *lo = NULL;
@ -1754,10 +1754,14 @@ lookup_again:
}
first = true;
do {
seq = read_seqbegin(&ctx->state->seqlock);
nfs4_stateid_copy(&stateid, &ctx->state->stateid);
} while (read_seqretry(&ctx->state->seqlock, seq));
if (nfs4_select_rw_stateid(ctx->state,
iomode == IOMODE_RW ? FMODE_WRITE : FMODE_READ,
NULL, &stateid, NULL) != 0) {
trace_pnfs_update_layout(ino, pos, count,
iomode, lo, lseg,
PNFS_UPDATE_LAYOUT_INVALID_OPEN);
goto out_unlock;
}
} else {
nfs4_stateid_copy(&stateid, &lo->plh_stateid);
}

4
fs/nfs/read.c
View File

@ -25,6 +25,7 @@
#include "iostat.h"
#include "fscache.h"
#include "pnfs.h"
#include "nfstrace.h"
#define NFSDBG_FACILITY NFSDBG_PAGECACHE
@ -200,6 +201,7 @@ static void nfs_initiate_read(struct nfs_pgio_header *hdr,
task_setup_data->flags |= swap_flags;
rpc_ops->read_setup(hdr, msg);
trace_nfs_initiate_read(inode, hdr->io_start, hdr->good_bytes);
}
static void
@ -232,6 +234,8 @@ static int nfs_readpage_done(struct rpc_task *task,
return status;
nfs_add_stats(inode, NFSIOS_SERVERREADBYTES, hdr->res.count);
trace_nfs_readpage_done(inode, task->tk_status,
hdr->args.offset, hdr->res.eof);
if (task->tk_status == -ESTALE) {
set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);

14
fs/nfs/write.c
View File

@ -145,13 +145,6 @@ static void nfs_io_completion_put(struct nfs_io_completion *ioc)
kref_put(&ioc->refcount, nfs_io_completion_release);
}
static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
{
ctx->error = error;
smp_wmb();
set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
}
static struct nfs_page *
nfs_page_private_request(struct page *page)
{
@ -1383,6 +1376,8 @@ static void nfs_initiate_write(struct nfs_pgio_header *hdr,
task_setup_data->priority = priority;
rpc_ops->write_setup(hdr, msg);
trace_nfs_initiate_write(hdr->inode, hdr->io_start, hdr->good_bytes,
hdr->args.stable);
nfs4_state_protect_write(NFS_SERVER(hdr->inode)->nfs_client,
&task_setup_data->rpc_client, msg, hdr);
@ -1540,7 +1535,10 @@ static int nfs_writeback_done(struct rpc_task *task,
status = NFS_PROTO(inode)->write_done(task, hdr);
if (status != 0)
return status;
nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, hdr->res.count);
trace_nfs_writeback_done(inode, task->tk_status,
hdr->args.offset, hdr->res.verf);
if (hdr->res.verf->committed < hdr->args.stable &&
task->tk_status >= 0) {
@ -1669,6 +1667,7 @@ int nfs_initiate_commit(struct rpc_clnt *clnt, struct nfs_commit_data *data,
};
/* Set up the initial task struct. */
nfs_ops->commit_setup(data, &msg);
trace_nfs_initiate_commit(data);
dprintk("NFS: initiated commit call\n");
@ -1793,6 +1792,7 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata)
/* Call the NFS version-specific code */
NFS_PROTO(data->inode)->commit_done(task, data);
trace_nfs_commit_done(data);
}
static void nfs_commit_release_pages(struct nfs_commit_data *data)