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-rw-r--r--fs/nfs/direct.c328
-rw-r--r--fs/nfs/file.c65
-rw-r--r--fs/nfs/inode.c76
-rw-r--r--fs/nfs/internal.h7
-rw-r--r--fs/nfs/nfs3acl.c43
-rw-r--r--fs/nfs/nfs3proc.c4
-rw-r--r--fs/nfs/nfs4_fs.h2
-rw-r--r--fs/nfs/nfs4file.c10
-rw-r--r--fs/nfs/nfs4namespace.c102
-rw-r--r--fs/nfs/nfs4proc.c2
-rw-r--r--fs/nfs/pagelist.c20
-rw-r--r--fs/nfs/write.c339
12 files changed, 572 insertions, 426 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 4ad7bc38867..f11b9eed0de 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -212,20 +212,20 @@ static int nfs_direct_cmp_commit_data_verf(struct nfs_direct_req *dreq,
* shunt off direct read and write requests before the VFS gets them,
* so this method is only ever called for swap.
*/
-ssize_t nfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t pos, unsigned long nr_segs)
+ssize_t nfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t pos)
{
#ifndef CONFIG_NFS_SWAP
dprintk("NFS: nfs_direct_IO (%pD) off/no(%Ld/%lu) EINVAL\n",
- iocb->ki_filp, (long long) pos, nr_segs);
+ iocb->ki_filp, (long long) pos, iter->nr_segs);
return -EINVAL;
#else
VM_BUG_ON(iocb->ki_nbytes != PAGE_SIZE);
if (rw == READ || rw == KERNEL_READ)
- return nfs_file_direct_read(iocb, iov, nr_segs, pos,
+ return nfs_file_direct_read(iocb, iter, pos,
rw == READ ? true : false);
- return nfs_file_direct_write(iocb, iov, nr_segs, pos,
+ return nfs_file_direct_write(iocb, iter, pos,
rw == WRITE ? true : false);
#endif /* CONFIG_NFS_SWAP */
}
@@ -414,60 +414,37 @@ static const struct nfs_pgio_completion_ops nfs_direct_read_completion_ops = {
* handled automatically by nfs_direct_read_result(). Otherwise, if
* no requests have been sent, just return an error.
*/
-static ssize_t nfs_direct_read_schedule_segment(struct nfs_pageio_descriptor *desc,
- const struct iovec *iov,
- loff_t pos, bool uio)
-{
- struct nfs_direct_req *dreq = desc->pg_dreq;
- struct nfs_open_context *ctx = dreq->ctx;
- struct inode *inode = ctx->dentry->d_inode;
- unsigned long user_addr = (unsigned long)iov->iov_base;
- size_t count = iov->iov_len;
- size_t rsize = NFS_SERVER(inode)->rsize;
- unsigned int pgbase;
- int result;
- ssize_t started = 0;
- struct page **pagevec = NULL;
- unsigned int npages;
-
- do {
- size_t bytes;
- int i;
- pgbase = user_addr & ~PAGE_MASK;
- bytes = min(max_t(size_t, rsize, PAGE_SIZE), count);
+static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
+ struct iov_iter *iter,
+ loff_t pos)
+{
+ struct nfs_pageio_descriptor desc;
+ struct inode *inode = dreq->inode;
+ ssize_t result = -EINVAL;
+ size_t requested_bytes = 0;
+ size_t rsize = max_t(size_t, NFS_SERVER(inode)->rsize, PAGE_SIZE);
- result = -ENOMEM;
- npages = nfs_page_array_len(pgbase, bytes);
- if (!pagevec)
- pagevec = kmalloc(npages * sizeof(struct page *),
- GFP_KERNEL);
- if (!pagevec)
- break;
- if (uio) {
- down_read(&current->mm->mmap_sem);
- result = get_user_pages(current, current->mm, user_addr,
- npages, 1, 0, pagevec, NULL);
- up_read(&current->mm->mmap_sem);
- if (result < 0)
- break;
- } else {
- WARN_ON(npages != 1);
- result = get_kernel_page(user_addr, 1, pagevec);
- if (WARN_ON(result != 1))
- break;
- }
+ nfs_pageio_init_read(&desc, dreq->inode, false,
+ &nfs_direct_read_completion_ops);
+ get_dreq(dreq);
+ desc.pg_dreq = dreq;
+ atomic_inc(&inode->i_dio_count);
- if ((unsigned)result < npages) {
- bytes = result * PAGE_SIZE;
- if (bytes <= pgbase) {
- nfs_direct_release_pages(pagevec, result);
- break;
- }
- bytes -= pgbase;
- npages = result;
- }
+ while (iov_iter_count(iter)) {
+ struct page **pagevec;
+ size_t bytes;
+ size_t pgbase;
+ unsigned npages, i;
+ result = iov_iter_get_pages_alloc(iter, &pagevec,
+ rsize, &pgbase);
+ if (result < 0)
+ break;
+
+ bytes = result;
+ iov_iter_advance(iter, bytes);
+ npages = (result + pgbase + PAGE_SIZE - 1) / PAGE_SIZE;
for (i = 0; i < npages; i++) {
struct nfs_page *req;
unsigned int req_len = min_t(size_t, bytes, PAGE_SIZE - pgbase);
@@ -480,56 +457,21 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_pageio_descriptor *de
}
req->wb_index = pos >> PAGE_SHIFT;
req->wb_offset = pos & ~PAGE_MASK;
- if (!nfs_pageio_add_request(desc, req)) {
- result = desc->pg_error;
+ if (!nfs_pageio_add_request(&desc, req)) {
+ result = desc.pg_error;
nfs_release_request(req);
break;
}
pgbase = 0;
bytes -= req_len;
- started += req_len;
- user_addr += req_len;
+ requested_bytes += req_len;
pos += req_len;
- count -= req_len;
dreq->bytes_left -= req_len;
}
- /* The nfs_page now hold references to these pages */
nfs_direct_release_pages(pagevec, npages);
- } while (count != 0 && result >= 0);
-
- kfree(pagevec);
-
- if (started)
- return started;
- return result < 0 ? (ssize_t) result : -EFAULT;
-}
-
-static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
- const struct iovec *iov,
- unsigned long nr_segs,
- loff_t pos, bool uio)
-{
- struct nfs_pageio_descriptor desc;
- struct inode *inode = dreq->inode;
- ssize_t result = -EINVAL;
- size_t requested_bytes = 0;
- unsigned long seg;
-
- nfs_pageio_init_read(&desc, dreq->inode, false,
- &nfs_direct_read_completion_ops);
- get_dreq(dreq);
- desc.pg_dreq = dreq;
- atomic_inc(&inode->i_dio_count);
-
- for (seg = 0; seg < nr_segs; seg++) {
- const struct iovec *vec = &iov[seg];
- result = nfs_direct_read_schedule_segment(&desc, vec, pos, uio);
+ kvfree(pagevec);
if (result < 0)
break;
- requested_bytes += result;
- if ((size_t)result < vec->iov_len)
- break;
- pos += vec->iov_len;
}
nfs_pageio_complete(&desc);
@@ -552,8 +494,7 @@ static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
/**
* nfs_file_direct_read - file direct read operation for NFS files
* @iocb: target I/O control block
- * @iov: vector of user buffers into which to read data
- * @nr_segs: size of iov vector
+ * @iter: vector of user buffers into which to read data
* @pos: byte offset in file where reading starts
*
* We use this function for direct reads instead of calling
@@ -570,8 +511,8 @@ static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
* client must read the updated atime from the server back into its
* cache.
*/
-ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos, bool uio)
+ssize_t nfs_file_direct_read(struct kiocb *iocb, struct iov_iter *iter,
+ loff_t pos, bool uio)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
@@ -579,9 +520,7 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov,
struct nfs_direct_req *dreq;
struct nfs_lock_context *l_ctx;
ssize_t result = -EINVAL;
- size_t count;
-
- count = iov_length(iov, nr_segs);
+ size_t count = iov_iter_count(iter);
nfs_add_stats(mapping->host, NFSIOS_DIRECTREADBYTES, count);
dfprintk(FILE, "NFS: direct read(%pD2, %zd@%Ld)\n",
@@ -604,7 +543,7 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov,
goto out_unlock;
dreq->inode = inode;
- dreq->bytes_left = iov_length(iov, nr_segs);
+ dreq->bytes_left = count;
dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp));
l_ctx = nfs_get_lock_context(dreq->ctx);
if (IS_ERR(l_ctx)) {
@@ -615,8 +554,8 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov,
if (!is_sync_kiocb(iocb))
dreq->iocb = iocb;
- NFS_I(inode)->read_io += iov_length(iov, nr_segs);
- result = nfs_direct_read_schedule_iovec(dreq, iov, nr_segs, pos, uio);
+ NFS_I(inode)->read_io += count;
+ result = nfs_direct_read_schedule_iovec(dreq, iter, pos);
mutex_unlock(&inode->i_mutex);
@@ -772,108 +711,6 @@ static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode
}
#endif
-/*
- * NB: Return the value of the first error return code. Subsequent
- * errors after the first one are ignored.
- */
-/*
- * For each wsize'd chunk of the user's buffer, dispatch an NFS WRITE
- * operation. If nfs_writedata_alloc() or get_user_pages() fails,
- * bail and stop sending more writes. Write length accounting is
- * handled automatically by nfs_direct_write_result(). Otherwise, if
- * no requests have been sent, just return an error.
- */
-static ssize_t nfs_direct_write_schedule_segment(struct nfs_pageio_descriptor *desc,
- const struct iovec *iov,
- loff_t pos, bool uio)
-{
- struct nfs_direct_req *dreq = desc->pg_dreq;
- struct nfs_open_context *ctx = dreq->ctx;
- struct inode *inode = ctx->dentry->d_inode;
- unsigned long user_addr = (unsigned long)iov->iov_base;
- size_t count = iov->iov_len;
- size_t wsize = NFS_SERVER(inode)->wsize;
- unsigned int pgbase;
- int result;
- ssize_t started = 0;
- struct page **pagevec = NULL;
- unsigned int npages;
-
- do {
- size_t bytes;
- int i;
-
- pgbase = user_addr & ~PAGE_MASK;
- bytes = min(max_t(size_t, wsize, PAGE_SIZE), count);
-
- result = -ENOMEM;
- npages = nfs_page_array_len(pgbase, bytes);
- if (!pagevec)
- pagevec = kmalloc(npages * sizeof(struct page *), GFP_KERNEL);
- if (!pagevec)
- break;
-
- if (uio) {
- down_read(&current->mm->mmap_sem);
- result = get_user_pages(current, current->mm, user_addr,
- npages, 0, 0, pagevec, NULL);
- up_read(&current->mm->mmap_sem);
- if (result < 0)
- break;
- } else {
- WARN_ON(npages != 1);
- result = get_kernel_page(user_addr, 0, pagevec);
- if (WARN_ON(result != 1))
- break;
- }
-
- if ((unsigned)result < npages) {
- bytes = result * PAGE_SIZE;
- if (bytes <= pgbase) {
- nfs_direct_release_pages(pagevec, result);
- break;
- }
- bytes -= pgbase;
- npages = result;
- }
-
- for (i = 0; i < npages; i++) {
- struct nfs_page *req;
- unsigned int req_len = min_t(size_t, bytes, PAGE_SIZE - pgbase);
-
- req = nfs_create_request(dreq->ctx, pagevec[i], NULL,
- pgbase, req_len);
- if (IS_ERR(req)) {
- result = PTR_ERR(req);
- break;
- }
- nfs_lock_request(req);
- req->wb_index = pos >> PAGE_SHIFT;
- req->wb_offset = pos & ~PAGE_MASK;
- if (!nfs_pageio_add_request(desc, req)) {
- result = desc->pg_error;
- nfs_unlock_and_release_request(req);
- break;
- }
- pgbase = 0;
- bytes -= req_len;
- started += req_len;
- user_addr += req_len;
- pos += req_len;
- count -= req_len;
- dreq->bytes_left -= req_len;
- }
- /* The nfs_page now hold references to these pages */
- nfs_direct_release_pages(pagevec, npages);
- } while (count != 0 && result >= 0);
-
- kfree(pagevec);
-
- if (started)
- return started;
- return result < 0 ? (ssize_t) result : -EFAULT;
-}
-
static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
{
struct nfs_direct_req *dreq = hdr->dreq;
@@ -919,7 +756,6 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
spin_unlock(&dreq->lock);
while (!list_empty(&hdr->pages)) {
- bool do_destroy = true;
req = nfs_list_entry(hdr->pages.next);
nfs_list_remove_request(req);
@@ -928,7 +764,6 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
case NFS_IOHDR_NEED_COMMIT:
kref_get(&req->wb_kref);
nfs_mark_request_commit(req, hdr->lseg, &cinfo);
- do_destroy = false;
}
nfs_unlock_and_release_request(req);
}
@@ -956,16 +791,27 @@ static const struct nfs_pgio_completion_ops nfs_direct_write_completion_ops = {
.completion = nfs_direct_write_completion,
};
+
+/*
+ * NB: Return the value of the first error return code. Subsequent
+ * errors after the first one are ignored.
+ */
+/*
+ * For each wsize'd chunk of the user's buffer, dispatch an NFS WRITE
+ * operation. If nfs_writedata_alloc() or get_user_pages() fails,
+ * bail and stop sending more writes. Write length accounting is
+ * handled automatically by nfs_direct_write_result(). Otherwise, if
+ * no requests have been sent, just return an error.
+ */
static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
- const struct iovec *iov,
- unsigned long nr_segs,
- loff_t pos, bool uio)
+ struct iov_iter *iter,
+ loff_t pos)
{
struct nfs_pageio_descriptor desc;
struct inode *inode = dreq->inode;
ssize_t result = 0;
size_t requested_bytes = 0;
- unsigned long seg;
+ size_t wsize = max_t(size_t, NFS_SERVER(inode)->wsize, PAGE_SIZE);
nfs_pageio_init_write(&desc, inode, FLUSH_COND_STABLE, false,
&nfs_direct_write_completion_ops);
@@ -973,16 +819,49 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
get_dreq(dreq);
atomic_inc(&inode->i_dio_count);
- NFS_I(dreq->inode)->write_io += iov_length(iov, nr_segs);
- for (seg = 0; seg < nr_segs; seg++) {
- const struct iovec *vec = &iov[seg];
- result = nfs_direct_write_schedule_segment(&desc, vec, pos, uio);
+ NFS_I(inode)->write_io += iov_iter_count(iter);
+ while (iov_iter_count(iter)) {
+ struct page **pagevec;
+ size_t bytes;
+ size_t pgbase;
+ unsigned npages, i;
+
+ result = iov_iter_get_pages_alloc(iter, &pagevec,
+ wsize, &pgbase);
if (result < 0)
break;
- requested_bytes += result;
- if ((size_t)result < vec->iov_len)
+
+ bytes = result;
+ iov_iter_advance(iter, bytes);
+ npages = (result + pgbase + PAGE_SIZE - 1) / PAGE_SIZE;
+ for (i = 0; i < npages; i++) {
+ struct nfs_page *req;
+ unsigned int req_len = min_t(size_t, bytes, PAGE_SIZE - pgbase);
+
+ req = nfs_create_request(dreq->ctx, pagevec[i], NULL,
+ pgbase, req_len);
+ if (IS_ERR(req)) {
+ result = PTR_ERR(req);
+ break;
+ }
+ nfs_lock_request(req);
+ req->wb_index = pos >> PAGE_SHIFT;
+ req->wb_offset = pos & ~PAGE_MASK;
+ if (!nfs_pageio_add_request(&desc, req)) {
+ result = desc.pg_error;
+ nfs_unlock_and_release_request(req);
+ break;
+ }
+ pgbase = 0;
+ bytes -= req_len;
+ requested_bytes += req_len;
+ pos += req_len;
+ dreq->bytes_left -= req_len;
+ }
+ nfs_direct_release_pages(pagevec, npages);
+ kvfree(pagevec);
+ if (result < 0)
break;
- pos += vec->iov_len;
}
nfs_pageio_complete(&desc);
@@ -1004,8 +883,7 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
/**
* nfs_file_direct_write - file direct write operation for NFS files
* @iocb: target I/O control block
- * @iov: vector of user buffers from which to write data
- * @nr_segs: size of iov vector
+ * @iter: vector of user buffers from which to write data
* @pos: byte offset in file where writing starts
*
* We use this function for direct writes instead of calling
@@ -1023,8 +901,8 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
* Note that O_APPEND is not supported for NFS direct writes, as there
* is no atomic O_APPEND write facility in the NFS protocol.
*/
-ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos, bool uio)
+ssize_t nfs_file_direct_write(struct kiocb *iocb, struct iov_iter *iter,
+ loff_t pos, bool uio)
{
ssize_t result = -EINVAL;
struct file *file = iocb->ki_filp;
@@ -1033,9 +911,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
struct nfs_direct_req *dreq;
struct nfs_lock_context *l_ctx;
loff_t end;
- size_t count;
-
- count = iov_length(iov, nr_segs);
+ size_t count = iov_iter_count(iter);
end = (pos + count - 1) >> PAGE_CACHE_SHIFT;
nfs_add_stats(mapping->host, NFSIOS_DIRECTWRITTENBYTES, count);
@@ -1086,7 +962,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
if (!is_sync_kiocb(iocb))
dreq->iocb = iocb;
- result = nfs_direct_write_schedule_iovec(dreq, iov, nr_segs, pos, uio);
+ result = nfs_direct_write_schedule_iovec(dreq, iter, pos);
if (mapping->nrpages) {
invalidate_inode_pages2_range(mapping,
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index c1edf733631..4042ff58fe3 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -165,22 +165,21 @@ nfs_file_flush(struct file *file, fl_owner_t id)
EXPORT_SYMBOL_GPL(nfs_file_flush);
ssize_t
-nfs_file_read(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos)
+nfs_file_read(struct kiocb *iocb, struct iov_iter *to)
{
struct inode *inode = file_inode(iocb->ki_filp);
ssize_t result;
if (iocb->ki_filp->f_flags & O_DIRECT)
- return nfs_file_direct_read(iocb, iov, nr_segs, pos, true);
+ return nfs_file_direct_read(iocb, to, iocb->ki_pos, true);
- dprintk("NFS: read(%pD2, %lu@%lu)\n",
+ dprintk("NFS: read(%pD2, %zu@%lu)\n",
iocb->ki_filp,
- (unsigned long) iov_length(iov, nr_segs), (unsigned long) pos);
+ iov_iter_count(to), (unsigned long) iocb->ki_pos);
result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping);
if (!result) {
- result = generic_file_aio_read(iocb, iov, nr_segs, pos);
+ result = generic_file_read_iter(iocb, to);
if (result > 0)
nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, result);
}
@@ -635,24 +634,24 @@ static int nfs_need_sync_write(struct file *filp, struct inode *inode)
return 0;
}
-ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos)
+ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
unsigned long written = 0;
ssize_t result;
- size_t count = iov_length(iov, nr_segs);
+ size_t count = iov_iter_count(from);
+ loff_t pos = iocb->ki_pos;
result = nfs_key_timeout_notify(file, inode);
if (result)
return result;
if (file->f_flags & O_DIRECT)
- return nfs_file_direct_write(iocb, iov, nr_segs, pos, true);
+ return nfs_file_direct_write(iocb, from, pos, true);
- dprintk("NFS: write(%pD2, %lu@%Ld)\n",
- file, (unsigned long) count, (long long) pos);
+ dprintk("NFS: write(%pD2, %zu@%Ld)\n",
+ file, count, (long long) pos);
result = -EBUSY;
if (IS_SWAPFILE(inode))
@@ -670,7 +669,7 @@ ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
if (!count)
goto out;
- result = generic_file_aio_write(iocb, iov, nr_segs, pos);
+ result = generic_file_write_iter(iocb, from);
if (result > 0)
written = result;
@@ -691,36 +690,6 @@ out_swapfile:
}
EXPORT_SYMBOL_GPL(nfs_file_write);
-ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
- struct file *filp, loff_t *ppos,
- size_t count, unsigned int flags)
-{
- struct inode *inode = file_inode(filp);
- unsigned long written = 0;
- ssize_t ret;
-
- dprintk("NFS splice_write(%pD2, %lu@%llu)\n",
- filp, (unsigned long) count, (unsigned long long) *ppos);
-
- /*
- * The combination of splice and an O_APPEND destination is disallowed.
- */
-
- ret = generic_file_splice_write(pipe, filp, ppos, count, flags);
- if (ret > 0)
- written = ret;
-
- if (ret >= 0 && nfs_need_sync_write(filp, inode)) {
- int err = vfs_fsync(filp, 0);
- if (err < 0)
- ret = err;
- }
- if (ret > 0)
- nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
- return ret;
-}
-EXPORT_SYMBOL_GPL(nfs_file_splice_write);
-
static int
do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
{
@@ -935,10 +904,10 @@ EXPORT_SYMBOL_GPL(nfs_setlease);
const struct file_operations nfs_file_operations = {
.llseek = nfs_file_llseek,
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = nfs_file_read,
- .aio_write = nfs_file_write,
+ .read = new_sync_read,
+ .write = new_sync_write,
+ .read_iter = nfs_file_read,
+ .write_iter = nfs_file_write,
.mmap = nfs_file_mmap,
.open = nfs_file_open,
.flush = nfs_file_flush,
@@ -947,7 +916,7 @@ const struct file_operations nfs_file_operations = {
.lock = nfs_lock,
.flock = nfs_flock,
.splice_read = nfs_file_splice_read,
- .splice_write = nfs_file_splice_write,
+ .splice_write = iter_file_splice_write,
.check_flags = nfs_check_flags,
.setlease = nfs_setlease,
};
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index c496f8a7463..9927913c97c 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -147,6 +147,17 @@ int nfs_sync_mapping(struct address_space *mapping)
return ret;
}
+static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+
+ if (inode->i_mapping->nrpages == 0)
+ flags &= ~NFS_INO_INVALID_DATA;
+ nfsi->cache_validity |= flags;
+ if (flags & NFS_INO_INVALID_DATA)
+ nfs_fscache_invalidate(inode);
+}
+
/*
* Invalidate the local caches
*/
@@ -162,17 +173,16 @@ static void nfs_zap_caches_locked(struct inode *inode)
memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf));
if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
- nfs_fscache_invalidate(inode);
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_DATA
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
- | NFS_INO_REVAL_PAGECACHE;
+ | NFS_INO_REVAL_PAGECACHE);
} else
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
- | NFS_INO_REVAL_PAGECACHE;
+ | NFS_INO_REVAL_PAGECACHE);
nfs_zap_label_cache_locked(nfsi);
}
@@ -187,8 +197,7 @@ void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
{
if (mapping->nrpages != 0) {
spin_lock(&inode->i_lock);
- NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
- nfs_fscache_invalidate(inode);
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
spin_unlock(&inode->i_lock);
}
}
@@ -209,7 +218,7 @@ EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
void nfs_invalidate_atime(struct inode *inode)
{
spin_lock(&inode->i_lock);
- NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
spin_unlock(&inode->i_lock);
}
EXPORT_SYMBOL_GPL(nfs_invalidate_atime);
@@ -369,7 +378,7 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st
inode->i_mode = fattr->mode;
if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
&& nfs_server_capable(inode, NFS_CAP_MODE))
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
/* Why so? Because we want revalidate for devices/FIFOs, and
* that's precisely what we have in nfs_file_inode_operations.
*/
@@ -415,36 +424,36 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st
if (fattr->valid & NFS_ATTR_FATTR_ATIME)
inode->i_atime = fattr->atime;
else if (nfs_server_capable(inode, NFS_CAP_ATIME))
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
if (fattr->valid & NFS_ATTR_FATTR_MTIME)
inode->i_mtime = fattr->mtime;
else if (nfs_server_capable(inode, NFS_CAP_MTIME))
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
if (fattr->valid & NFS_ATTR_FATTR_CTIME)
inode->i_ctime = fattr->ctime;
else if (nfs_server_capable(inode, NFS_CAP_CTIME))
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
inode->i_version = fattr->change_attr;
else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
if (fattr->valid & NFS_ATTR_FATTR_SIZE)
inode->i_size = nfs_size_to_loff_t(fattr->size);
else
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR
- | NFS_INO_REVAL_PAGECACHE;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
+ | NFS_INO_REVAL_PAGECACHE);
if (fattr->valid & NFS_ATTR_FATTR_NLINK)
set_nlink(inode, fattr->nlink);
else if (nfs_server_capable(inode, NFS_CAP_NLINK))
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
if (fattr->valid & NFS_ATTR_FATTR_OWNER)
inode->i_uid = fattr->uid;
else if (nfs_server_capable(inode, NFS_CAP_OWNER))
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
if (fattr->valid & NFS_ATTR_FATTR_GROUP)
inode->i_gid = fattr->gid;
else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
inode->i_blocks = fattr->du.nfs2.blocks;
if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
@@ -550,6 +559,9 @@ static int nfs_vmtruncate(struct inode * inode, loff_t offset)
spin_lock(&inode->i_lock);
i_size_write(inode, offset);
+ /* Optimisation */
+ if (offset == 0)
+ NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA;
spin_unlock(&inode->i_lock);
truncate_pagecache(inode, offset);
@@ -578,7 +590,8 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
inode->i_uid = attr->ia_uid;
if ((attr->ia_valid & ATTR_GID) != 0)
inode->i_gid = attr->ia_gid;
- NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
+ | NFS_INO_INVALID_ACL);
spin_unlock(&inode->i_lock);
}
if ((attr->ia_valid & ATTR_SIZE) != 0) {
@@ -1101,7 +1114,7 @@ static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr
&& inode->i_version == fattr->pre_change_attr) {
inode->i_version = fattr->change_attr;
if (S_ISDIR(inode->i_mode))
- nfsi->cache_validity |= NFS_INO_INVALID_DATA;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
ret |= NFS_INO_INVALID_ATTR;
}
/* If we have atomic WCC data, we may update some attributes */
@@ -1117,7 +1130,7 @@ static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr
&& timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
if (S_ISDIR(inode->i_mode))
- nfsi->cache_validity |= NFS_INO_INVALID_DATA;
+ nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
ret |= NFS_INO_INVALID_ATTR;
}
if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
@@ -1128,9 +1141,6 @@ static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr
ret |= NFS_INO_INVALID_ATTR;
}
- if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
- nfs_fscache_invalidate(inode);
-
return ret;
}
@@ -1189,7 +1199,7 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
invalid |= NFS_INO_INVALID_ATIME;
if (invalid != 0)
- nfsi->cache_validity |= invalid;
+ nfs_set_cache_invalid(inode, invalid);
nfsi->read_cache_jiffies = fattr->time_start;
return 0;
@@ -1402,13 +1412,11 @@ EXPORT_SYMBOL_GPL(nfs_refresh_inode);
static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
{
- struct nfs_inode *nfsi = NFS_I(inode);
+ unsigned long invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
- if (S_ISDIR(inode->i_mode)) {
- nfsi->cache_validity |= NFS_INO_INVALID_DATA;
- nfs_fscache_invalidate(inode);
- }
+ if (S_ISDIR(inode->i_mode))
+ invalid |= NFS_INO_INVALID_DATA;
+ nfs_set_cache_invalid(inode, invalid);
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
return 0;
return nfs_refresh_inode_locked(inode, fattr);
@@ -1601,6 +1609,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
if ((nfsi->npages == 0) || new_isize > cur_isize) {
i_size_write(inode, new_isize);
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
+ invalid &= ~NFS_INO_REVAL_PAGECACHE;
}
dprintk("NFS: isize change on server for file %s/%ld "
"(%Ld to %Ld)\n",
@@ -1702,10 +1711,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
invalid &= ~NFS_INO_INVALID_DATA;
if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) ||
(save_cache_validity & NFS_INO_REVAL_FORCED))
- nfsi->cache_validity |= invalid;
-
- if (invalid & NFS_INO_INVALID_DATA)
- nfs_fscache_invalidate(inode);
+ nfs_set_cache_invalid(inode, invalid);
return 0;
out_err:
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 8b69cba1bb0..f415cbf9f6c 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -244,6 +244,7 @@ void nfs_pgio_data_release(struct nfs_pgio_data *);
int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_data *,
const struct rpc_call_ops *, int, int);
+void nfs_free_request(struct nfs_page *req);
static inline void nfs_iocounter_init(struct nfs_io_counter *c)
{
@@ -327,16 +328,14 @@ int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *)
int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
loff_t nfs_file_llseek(struct file *, loff_t, int);
int nfs_file_flush(struct file *, fl_owner_t);
-ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
+ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
size_t, unsigned int);
int nfs_file_mmap(struct file *, struct vm_area_struct *);
-ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
+ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
int nfs_file_release(struct inode *, struct file *);
int nfs_lock(struct file *, int, struct file_lock *);
int nfs_flock(struct file *, int, struct file_lock *);
-ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
- size_t, unsigned int);
int nfs_check_flags(int);
int nfs_setlease(struct file *, long, struct file_lock **);
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 871d6eda8db..8f854dde415 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -247,3 +247,46 @@ const struct xattr_handler *nfs3_xattr_handlers[] = {
&posix_acl_default_xattr_handler,
NULL,
};
+
+static int
+nfs3_list_one_acl(struct inode *inode, int type, const char *name, void *data,
+ size_t size, ssize_t *result)
+{
+ struct posix_acl *acl;
+ char *p = data + *result;
+
+ acl = get_acl(inode, type);
+ if (!acl)
+ return 0;
+
+ posix_acl_release(acl);
+
+ *result += strlen(name);
+ *result += 1;
+ if (!size)
+ return 0;
+ if (*result > size)
+ return -ERANGE;
+
+ strcpy(p, name);
+ return 0;
+}
+
+ssize_t
+nfs3_listxattr(struct dentry *dentry, char *data, size_t size)
+{
+ struct inode *inode = dentry->d_inode;
+ ssize_t result = 0;
+ int error;
+
+ error = nfs3_list_one_acl(inode, ACL_TYPE_ACCESS,
+ POSIX_ACL_XATTR_ACCESS, data, size, &result);
+ if (error)
+ return error;
+
+ error = nfs3_list_one_acl(inode, ACL_TYPE_DEFAULT,
+ POSIX_ACL_XATTR_DEFAULT, data, size, &result);
+ if (error)
+ return error;
+ return result;
+}
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index e7daa42bbc8..f0afa291fd5 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -885,7 +885,7 @@ static const struct inode_operations nfs3_dir_inode_operations = {
.getattr = nfs_getattr,
.setattr = nfs_setattr,
#ifdef CONFIG_NFS_V3_ACL
- .listxattr = generic_listxattr,
+ .listxattr = nfs3_listxattr,
.getxattr = generic_getxattr,
.setxattr = generic_setxattr,
.removexattr = generic_removexattr,
@@ -899,7 +899,7 @@ static const struct inode_operations nfs3_file_inode_operations = {
.getattr = nfs_getattr,
.setattr = nfs_setattr,
#ifdef CONFIG_NFS_V3_ACL
- .listxattr = generic_listxattr,
+ .listxattr = nfs3_listxattr,
.getxattr = generic_getxattr,
.setxattr = generic_setxattr,
.removexattr = generic_removexattr,
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index f63cb87cd73..ba2affa5194 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -230,7 +230,7 @@ int nfs_atomic_open(struct inode *, struct dentry *, struct file *,
extern struct file_system_type nfs4_fs_type;
/* nfs4namespace.c */
-struct rpc_clnt *nfs4_create_sec_client(struct rpc_clnt *, struct inode *, struct qstr *);
+struct rpc_clnt *nfs4_negotiate_security(struct rpc_clnt *, struct inode *, struct qstr *);
struct vfsmount *nfs4_submount(struct nfs_server *, struct dentry *,
struct nfs_fh *, struct nfs_fattr *);
int nfs4_replace_transport(struct nfs_server *server,
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 464db9dd631..a816f0627a6 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -117,10 +117,10 @@ nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
const struct file_operations nfs4_file_operations = {
.llseek = nfs_file_llseek,
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = nfs_file_read,
- .aio_write = nfs_file_write,
+ .read = new_sync_read,
+ .write = new_sync_write,
+ .read_iter = nfs_file_read,
+ .write_iter = nfs_file_write,
.mmap = nfs_file_mmap,
.open = nfs4_file_open,
.flush = nfs_file_flush,
@@ -129,7 +129,7 @@ const struct file_operations nfs4_file_operations = {
.lock = nfs_lock,
.flock = nfs_flock,
.splice_read = nfs_file_splice_read,
- .splice_write = nfs_file_splice_write,
+ .splice_write = iter_file_splice_write,
.check_flags = nfs_check_flags,
.setlease = nfs_setlease,
};
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 3d5dbf80d46..3d83cb1fdc7 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -139,16 +139,22 @@ static size_t nfs_parse_server_name(char *string, size_t len,
* @server: NFS server struct
* @flavors: List of security tuples returned by SECINFO procedure
*
- * Return the pseudoflavor of the first security mechanism in
- * "flavors" that is locally supported. Return RPC_AUTH_UNIX if
- * no matching flavor is found in the array. The "flavors" array
+ * Return an rpc client that uses the first security mechanism in
+ * "flavors" that is locally supported. The "flavors" array
* is searched in the order returned from the server, per RFC 3530
- * recommendation.
+ * recommendation and each flavor is checked for membership in the
+ * sec= mount option list if it exists.
+ *
+ * Return -EPERM if no matching flavor is found in the array.
+ *
+ * Please call rpc_shutdown_client() when you are done with this rpc client.
+ *
*/
-static rpc_authflavor_t nfs_find_best_sec(struct nfs_server *server,
+static struct rpc_clnt *nfs_find_best_sec(struct rpc_clnt *clnt,
+ struct nfs_server *server,
struct nfs4_secinfo_flavors *flavors)
{
- rpc_authflavor_t pseudoflavor;
+ rpc_authflavor_t pflavor;
struct nfs4_secinfo4 *secinfo;
unsigned int i;
@@ -159,62 +165,73 @@ static rpc_authflavor_t nfs_find_best_sec(struct nfs_server *server,
case RPC_AUTH_NULL:
case RPC_AUTH_UNIX:
case RPC_AUTH_GSS:
- pseudoflavor = rpcauth_get_pseudoflavor(secinfo->flavor,
+ pflavor = rpcauth_get_pseudoflavor(secinfo->flavor,
&secinfo->flavor_info);
- /* make sure pseudoflavor matches sec= mount opt */
- if (pseudoflavor != RPC_AUTH_MAXFLAVOR &&
- nfs_auth_info_match(&server->auth_info,
- pseudoflavor))
- return pseudoflavor;
- break;
+ /* does the pseudoflavor match a sec= mount opt? */
+ if (pflavor != RPC_AUTH_MAXFLAVOR &&
+ nfs_auth_info_match(&server->auth_info, pflavor)) {
+ struct rpc_clnt *new;
+ struct rpc_cred *cred;
+
+ /* Cloning creates an rpc_auth for the flavor */
+ new = rpc_clone_client_set_auth(clnt, pflavor);
+ if (IS_ERR(new))
+ continue;
+ /**
+ * Check that the user actually can use the
+ * flavor. This is mostly for RPC_AUTH_GSS
+ * where cr_init obtains a gss context
+ */
+ cred = rpcauth_lookupcred(new->cl_auth, 0);
+ if (IS_ERR(cred)) {
+ rpc_shutdown_client(new);
+ continue;
+ }
+ put_rpccred(cred);
+ return new;
+ }
}
}
-
- /* if there were any sec= options then nothing matched */
- if (server->auth_info.flavor_len > 0)
- return -EPERM;
-
- return RPC_AUTH_UNIX;
+ return ERR_PTR(-EPERM);
}
-static rpc_authflavor_t nfs4_negotiate_security(struct inode *inode, struct qstr *name)
+/**
+ * nfs4_negotiate_security - in response to an NFS4ERR_WRONGSEC on lookup,
+ * return an rpc_clnt that uses the best available security flavor with
+ * respect to the secinfo flavor list and the sec= mount options.
+ *
+ * @clnt: RPC client to clone
+ * @inode: directory inode
+ * @name: lookup name
+ *
+ * Please call rpc_shutdown_client() when you are done with this rpc client.
+ */
+struct rpc_clnt *
+nfs4_negotiate_security(struct rpc_clnt *clnt, struct inode *inode,
+ struct qstr *name)
{
struct page *page;
struct nfs4_secinfo_flavors *flavors;
- rpc_authflavor_t flavor;
+ struct rpc_clnt *new;
int err;
page = alloc_page(GFP_KERNEL);
if (!page)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
+
flavors = page_address(page);
err = nfs4_proc_secinfo(inode, name, flavors);
if (err < 0) {
- flavor = err;
+ new = ERR_PTR(err);
goto out;
}
- flavor = nfs_find_best_sec(NFS_SERVER(inode), flavors);
+ new = nfs_find_best_sec(clnt, NFS_SERVER(inode), flavors);
out:
put_page(page);
- return flavor;
-}
-
-/*
- * Please call rpc_shutdown_client() when you are done with this client.
- */
-struct rpc_clnt *nfs4_create_sec_client(struct rpc_clnt *clnt, struct inode *inode,
- struct qstr *name)
-{
- rpc_authflavor_t flavor;
-
- flavor = nfs4_negotiate_security(inode, name);
- if ((int)flavor < 0)
- return ERR_PTR((int)flavor);
-
- return rpc_clone_client_set_auth(clnt, flavor);
+ return new;
}
static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
@@ -397,11 +414,6 @@ struct vfsmount *nfs4_submount(struct nfs_server *server, struct dentry *dentry,
if (client->cl_auth->au_flavor != flavor)
flavor = client->cl_auth->au_flavor;
- else {
- rpc_authflavor_t new = nfs4_negotiate_security(dir, name);
- if ((int)new >= 0)
- flavor = new;
- }
mnt = nfs_do_submount(dentry, fh, fattr, flavor);
out:
rpc_shutdown_client(client);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 285ad533401..4bf3d97cc5a 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3247,7 +3247,7 @@ static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
err = -EPERM;
if (client != *clnt)
goto out;
- client = nfs4_create_sec_client(client, dir, name);
+ client = nfs4_negotiate_security(client, dir, name);
if (IS_ERR(client))
return PTR_ERR(client);
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index b6ee3a6ee96..17fab89f635 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -29,8 +29,6 @@
static struct kmem_cache *nfs_page_cachep;
static const struct rpc_call_ops nfs_pgio_common_ops;
-static void nfs_free_request(struct nfs_page *);
-
static bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount)
{
p->npages = pagecount;
@@ -239,20 +237,28 @@ nfs_page_group_init(struct nfs_page *req, struct nfs_page *prev)
WARN_ON_ONCE(prev == req);
if (!prev) {
+ /* a head request */
req->wb_head = req;
req->wb_this_page = req;
} else {
+ /* a subrequest */
WARN_ON_ONCE(prev->wb_this_page != prev->wb_head);
WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &prev->wb_head->wb_flags));
req->wb_head = prev->wb_head;
req->wb_this_page = prev->wb_this_page;
prev->wb_this_page = req;
+ /* All subrequests take a ref on the head request until
+ * nfs_page_group_destroy is called */
+ kref_get(&req->wb_head->wb_kref);
+
/* grab extra ref if head request has extra ref from
* the write/commit path to handle handoff between write
* and commit lists */
- if (test_bit(PG_INODE_REF, &prev->wb_head->wb_flags))
+ if (test_bit(PG_INODE_REF, &prev->wb_head->wb_flags)) {
+ set_bit(PG_INODE_REF, &req->wb_flags);
kref_get(&req->wb_kref);
+ }
}
}
@@ -269,6 +275,10 @@ nfs_page_group_destroy(struct kref *kref)
struct nfs_page *req = container_of(kref, struct nfs_page, wb_kref);
struct nfs_page *tmp, *next;
+ /* subrequests must release the ref on the head request */
+ if (req->wb_head != req)
+ nfs_release_request(req->wb_head);
+
if (!nfs_page_group_sync_on_bit(req, PG_TEARDOWN))
return;
@@ -394,7 +404,7 @@ static void nfs_clear_request(struct nfs_page *req)
*
* Note: Should never be called with the spinlock held!
*/
-static void nfs_free_request(struct nfs_page *req)
+void nfs_free_request(struct nfs_page *req)
{
WARN_ON_ONCE(req->wb_this_page != req);
@@ -925,7 +935,6 @@ static int __nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
nfs_pageio_doio(desc);
if (desc->pg_error < 0)
return 0;
- desc->pg_moreio = 0;
if (desc->pg_recoalesce)
return 0;
/* retry add_request for this subreq */
@@ -972,6 +981,7 @@ static int nfs_do_recoalesce(struct nfs_pageio_descriptor *desc)
desc->pg_count = 0;
desc->pg_base = 0;
desc->pg_recoalesce = 0;
+ desc->pg_moreio = 0;
while (!list_empty(&head)) {
struct nfs_page *req;
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 3ee5af4e738..5e2f1030454 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -46,6 +46,7 @@ static const struct rpc_call_ops nfs_commit_ops;
static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops;
static const struct nfs_commit_completion_ops nfs_commit_completion_ops;
static const struct nfs_rw_ops nfs_rw_write_ops;
+static void nfs_clear_request_commit(struct nfs_page *req);
static struct kmem_cache *nfs_wdata_cachep;
static mempool_t *nfs_wdata_mempool;
@@ -91,8 +92,15 @@ static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
}
+/*
+ * nfs_page_find_head_request_locked - find head request associated with @page
+ *
+ * must be called while holding the inode lock.
+ *
+ * returns matching head request with reference held, or NULL if not found.
+ */
static struct nfs_page *
-nfs_page_find_request_locked(struct nfs_inode *nfsi, struct page *page)
+nfs_page_find_head_request_locked(struct nfs_inode *nfsi, struct page *page)
{
struct nfs_page *req = NULL;
@@ -104,25 +112,33 @@ nfs_page_find_request_locked(struct nfs_inode *nfsi, struct page *page)
/* Linearly search the commit list for the correct req */
list_for_each_entry_safe(freq, t, &nfsi->commit_info.list, wb_list) {
if (freq->wb_page == page) {
- req = freq;
+ req = freq->wb_head;
break;
}
}
}
- if (req)
+ if (req) {
+ WARN_ON_ONCE(req->wb_head != req);
+
kref_get(&req->wb_kref);
+ }
return req;
}
-static struct nfs_page *nfs_page_find_request(struct page *page)
+/*
+ * nfs_page_find_head_request - find head request associated with @page
+ *
+ * returns matching head request with reference held, or NULL if not found.
+ */
+static struct nfs_page *nfs_page_find_head_request(struct page *page)
{
struct inode *inode = page_file_mapping(page)->host;
struct nfs_page *req = NULL;
spin_lock(&inode->i_lock);
- req = nfs_page_find_request_locked(NFS_I(inode), page);
+ req = nfs_page_find_head_request_locked(NFS_I(inode), page);
spin_unlock(&inode->i_lock);
return req;
}
@@ -274,36 +290,246 @@ static void nfs_end_page_writeback(struct nfs_page *req)
clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC);
}
-static struct nfs_page *nfs_find_and_lock_request(struct page *page, bool nonblock)
+
+/* nfs_page_group_clear_bits
+ * @req - an nfs request
+ * clears all page group related bits from @req
+ */
+static void
+nfs_page_group_clear_bits(struct nfs_page *req)
+{
+ clear_bit(PG_TEARDOWN, &req->wb_flags);
+ clear_bit(PG_UNLOCKPAGE, &req->wb_flags);
+ clear_bit(PG_UPTODATE, &req->wb_flags);
+ clear_bit(PG_WB_END, &req->wb_flags);
+ clear_bit(PG_REMOVE, &req->wb_flags);
+}
+
+
+/*
+ * nfs_unroll_locks_and_wait - unlock all newly locked reqs and wait on @req
+ *
+ * this is a helper function for nfs_lock_and_join_requests
+ *
+ * @inode - inode associated with request page group, must be holding inode lock
+ * @head - head request of page group, must be holding head lock
+ * @req - request that couldn't lock and needs to wait on the req bit lock
+ * @nonblock - if true, don't actually wait
+ *
+ * NOTE: this must be called holding page_group bit lock and inode spin lock
+ * and BOTH will be released before returning.
+ *
+ * returns 0 on success, < 0 on error.
+ */
+static int
+nfs_unroll_locks_and_wait(struct inode *inode, struct nfs_page *head,
+ struct nfs_page *req, bool nonblock)
+ __releases(&inode->i_lock)
+{
+ struct nfs_page *tmp;
+ int ret;
+
+ /* relinquish all the locks successfully grabbed this run */
+ for (tmp = head ; tmp != req; tmp = tmp->wb_this_page)
+ nfs_unlock_request(tmp);
+
+ WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags));
+
+ /* grab a ref on the request that will be waited on */
+ kref_get(&req->wb_kref);
+
+ nfs_page_group_unlock(head);
+ spin_unlock(&inode->i_lock);
+
+ /* release ref from nfs_page_find_head_request_locked */
+ nfs_release_request(head);
+
+ if (!nonblock)
+ ret = nfs_wait_on_request(req);
+ else
+ ret = -EAGAIN;
+ nfs_release_request(req);
+
+ return ret;
+}
+
+/*
+ * nfs_destroy_unlinked_subrequests - destroy recently unlinked subrequests
+ *
+ * @destroy_list - request list (using wb_this_page) terminated by @old_head
+ * @old_head - the old head of the list
+ *
+ * All subrequests must be locked and removed from all lists, so at this point
+ * they are only "active" in this function, and possibly in nfs_wait_on_request
+ * with a reference held by some other context.
+ */
+static void
+nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list,
+ struct nfs_page *old_head)
+{
+ while (destroy_list) {
+ struct nfs_page *subreq = destroy_list;
+
+ destroy_list = (subreq->wb_this_page == old_head) ?
+ NULL : subreq->wb_this_page;
+
+ WARN_ON_ONCE(old_head != subreq->wb_head);
+
+ /* make sure old group is not used */
+ subreq->wb_head = subreq;
+ subreq->wb_this_page = subreq;
+
+ nfs_clear_request_commit(subreq);
+
+ /* subreq is now totally disconnected from page group or any
+ * write / commit lists. last chance to wake any waiters */
+ nfs_unlock_request(subreq);
+
+ if (!test_bit(PG_TEARDOWN, &subreq->wb_flags)) {
+ /* release ref on old head request */
+ nfs_release_request(old_head);
+
+ nfs_page_group_clear_bits(subreq);
+
+ /* release the PG_INODE_REF reference */
+ if (test_and_clear_bit(PG_INODE_REF, &subreq->wb_flags))
+ nfs_release_request(subreq);
+ else
+ WARN_ON_ONCE(1);
+ } else {
+ WARN_ON_ONCE(test_bit(PG_CLEAN, &subreq->wb_flags));
+ /* zombie requests have already released the last
+ * reference and were waiting on the rest of the
+ * group to complete. Since it's no longer part of a
+ * group, simply free the request */
+ nfs_page_group_clear_bits(subreq);
+ nfs_free_request(subreq);
+ }
+ }
+}
+
+/*
+ * nfs_lock_and_join_requests - join all subreqs to the head req and return
+ * a locked reference, cancelling any pending
+ * operations for this page.
+ *
+ * @page - the page used to lookup the "page group" of nfs_page structures
+ * @nonblock - if true, don't block waiting for request locks
+ *
+ * This function joins all sub requests to the head request by first
+ * locking all requests in the group, cancelling any pending operations
+ * and finally updating the head request to cover the whole range covered by
+ * the (former) group. All subrequests are removed from any write or commit
+ * lists, unlinked from the group and destroyed.
+ *
+ * Returns a locked, referenced pointer to the head request - which after
+ * this call is guaranteed to be the only request associated with the page.
+ * Returns NULL if no requests are found for @page, or a ERR_PTR if an
+ * error was encountered.
+ */
+static struct nfs_page *
+nfs_lock_and_join_requests(struct page *page, bool nonblock)
{
struct inode *inode = page_file_mapping(page)->host;
- struct nfs_page *req;
+ struct nfs_page *head, *subreq;
+ struct nfs_page *destroy_list = NULL;
+ unsigned int total_bytes;
int ret;
+try_again:
+ total_bytes = 0;
+
+ WARN_ON_ONCE(destroy_list);
+
spin_lock(&inode->i_lock);
- for (;;) {
- req = nfs_page_find_request_locked(NFS_I(inode), page);
- if (req == NULL)
- break;
- if (nfs_lock_request(req))
- break;
- /* Note: If we hold the page lock, as is the case in nfs_writepage,
- * then the call to nfs_lock_request() will always
- * succeed provided that someone hasn't already marked the
- * request as dirty (in which case we don't care).
- */
+
+ /*
+ * A reference is taken only on the head request which acts as a
+ * reference to the whole page group - the group will not be destroyed
+ * until the head reference is released.
+ */
+ head = nfs_page_find_head_request_locked(NFS_I(inode), page);
+
+ if (!head) {
spin_unlock(&inode->i_lock);
- if (!nonblock)
- ret = nfs_wait_on_request(req);
- else
- ret = -EAGAIN;
- nfs_release_request(req);
- if (ret != 0)
+ return NULL;
+ }
+
+ /* lock each request in the page group */
+ nfs_page_group_lock(head);
+ subreq = head;
+ do {
+ /*
+ * Subrequests are always contiguous, non overlapping
+ * and in order. If not, it's a programming error.
+ */
+ WARN_ON_ONCE(subreq->wb_offset !=
+ (head->wb_offset + total_bytes));
+
+ /* keep track of how many bytes this group covers */
+ total_bytes += subreq->wb_bytes;
+
+ if (!nfs_lock_request(subreq)) {
+ /* releases page group bit lock and
+ * inode spin lock and all references */
+ ret = nfs_unroll_locks_and_wait(inode, head,
+ subreq, nonblock);
+
+ if (ret == 0)
+ goto try_again;
+
return ERR_PTR(ret);
- spin_lock(&inode->i_lock);
+ }
+
+ subreq = subreq->wb_this_page;
+ } while (subreq != head);
+
+ /* Now that all requests are locked, make sure they aren't on any list.
+ * Commit list removal accounting is done after locks are dropped */
+ subreq = head;
+ do {
+ nfs_list_remove_request(subreq);
+ subreq = subreq->wb_this_page;
+ } while (subreq != head);
+
+ /* unlink subrequests from head, destroy them later */
+ if (head->wb_this_page != head) {
+ /* destroy list will be terminated by head */
+ destroy_list = head->wb_this_page;
+ head->wb_this_page = head;
+
+ /* change head request to cover whole range that
+ * the former page group covered */
+ head->wb_bytes = total_bytes;
}
+
+ /*
+ * prepare head request to be added to new pgio descriptor
+ */
+ nfs_page_group_clear_bits(head);
+
+ /*
+ * some part of the group was still on the inode list - otherwise
+ * the group wouldn't be involved in async write.
+ * grab a reference for the head request, iff it needs one.
+ */
+ if (!test_and_set_bit(PG_INODE_REF, &head->wb_flags))
+ kref_get(&head->wb_kref);
+
+ nfs_page_group_unlock(head);
+
+ /* drop lock to clear_request_commit the head req and clean up
+ * requests on destroy list */
spin_unlock(&inode->i_lock);
- return req;
+
+ nfs_destroy_unlinked_subrequests(destroy_list, head);
+
+ /* clean up commit list state */
+ nfs_clear_request_commit(head);
+
+ /* still holds ref on head from nfs_page_find_head_request_locked
+ * and still has lock on head from lock loop */
+ return head;
}
/*
@@ -316,7 +542,7 @@ static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req;
int ret = 0;
- req = nfs_find_and_lock_request(page, nonblock);
+ req = nfs_lock_and_join_requests(page, nonblock);
if (!req)
goto out;
ret = PTR_ERR(req);
@@ -448,7 +674,9 @@ static void nfs_inode_add_request(struct inode *inode, struct nfs_page *req)
set_page_private(req->wb_page, (unsigned long)req);
}
nfsi->npages++;
- set_bit(PG_INODE_REF, &req->wb_flags);
+ /* this a head request for a page group - mark it as having an
+ * extra reference so sub groups can follow suit */
+ WARN_ON(test_and_set_bit(PG_INODE_REF, &req->wb_flags));
kref_get(&req->wb_kref);
spin_unlock(&inode->i_lock);
}
@@ -474,7 +702,9 @@ static void nfs_inode_remove_request(struct nfs_page *req)
nfsi->npages--;
spin_unlock(&inode->i_lock);
}
- nfs_release_request(req);
+
+ if (test_and_clear_bit(PG_INODE_REF, &req->wb_flags))
+ nfs_release_request(req);
}
static void
@@ -638,7 +868,6 @@ static void nfs_write_completion(struct nfs_pgio_header *hdr)
{
struct nfs_commit_info cinfo;
unsigned long bytes = 0;
- bool do_destroy;
if (test_bit(NFS_IOHDR_REDO, &hdr->flags))
goto out;
@@ -668,7 +897,6 @@ remove_req:
next:
nfs_unlock_request(req);
nfs_end_page_writeback(req);
- do_destroy = !test_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags);
nfs_release_request(req);
}
out:
@@ -769,7 +997,7 @@ static struct nfs_page *nfs_try_to_update_request(struct inode *inode,
spin_lock(&inode->i_lock);
for (;;) {
- req = nfs_page_find_request_locked(NFS_I(inode), page);
+ req = nfs_page_find_head_request_locked(NFS_I(inode), page);
if (req == NULL)
goto out_unlock;
@@ -877,7 +1105,7 @@ int nfs_flush_incompatible(struct file *file, struct page *page)
* dropped page.
*/
do {
- req = nfs_page_find_request(page);
+ req = nfs_page_find_head_request(page);
if (req == NULL)
return 0;
l_ctx = req->wb_lock_context;
@@ -934,12 +1162,14 @@ static bool nfs_write_pageuptodate(struct page *page, struct inode *inode)
if (nfs_have_delegated_attributes(inode))
goto out;
- if (nfsi->cache_validity & (NFS_INO_INVALID_DATA|NFS_INO_REVAL_PAGECACHE))
+ if (nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
return false;
smp_rmb();
if (test_bit(NFS_INO_INVALIDATING, &nfsi->flags))
return false;
out:
+ if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
+ return false;
return PageUptodate(page) != 0;
}
@@ -1567,27 +1797,28 @@ int nfs_wb_page_cancel(struct inode *inode, struct page *page)
struct nfs_page *req;
int ret = 0;
- for (;;) {
- wait_on_page_writeback(page);
- req = nfs_page_find_request(page);
- if (req == NULL)
- break;
- if (nfs_lock_request(req)) {
- nfs_clear_request_commit(req);
- nfs_inode_remove_request(req);
- /*
- * In case nfs_inode_remove_request has marked the
- * page as being dirty
- */
- cancel_dirty_page(page, PAGE_CACHE_SIZE);
- nfs_unlock_and_release_request(req);
- break;
- }
- ret = nfs_wait_on_request(req);
- nfs_release_request(req);
- if (ret < 0)
- break;
+ wait_on_page_writeback(page);
+
+ /* blocking call to cancel all requests and join to a single (head)
+ * request */
+ req = nfs_lock_and_join_requests(page, false);
+
+ if (IS_ERR(req)) {
+ ret = PTR_ERR(req);
+ } else if (req) {
+ /* all requests from this page have been cancelled by
+ * nfs_lock_and_join_requests, so just remove the head
+ * request from the inode / page_private pointer and
+ * release it */
+ nfs_inode_remove_request(req);
+ /*
+ * In case nfs_inode_remove_request has marked the
+ * page as being dirty
+ */
+ cancel_dirty_page(page, PAGE_CACHE_SIZE);
+ nfs_unlock_and_release_request(req);
}
+
return ret;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 08:47:04 +0000