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Subject[PATCH 03/19] orangefs: simplify orangefs_inode_getattr interface
Date
No need to store the received mask.  It is either STATX_BASIC_STATS or
STATX_BASIC_STATS & ~STATX_SIZE. If STATX_SIZE is requested, the cache
is bypassed anyway, so the cached mask is unnecessary to decide whether
to do a real getattr.

This is a change. Previously a getattr would want size and use the
cached size. All of the in-kernel callers that wanted size did not want
a cached size. Now a getattr cannot use the cached size if it wants
size at all.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
---
fs/orangefs/file.c | 17 ++++++++---------
fs/orangefs/inode.c | 11 ++++++-----
fs/orangefs/orangefs-kernel.h | 7 ++++---
fs/orangefs/orangefs-utils.c | 31 ++++++++++---------------------
4 files changed, 28 insertions(+), 38 deletions(-)

diff --git a/fs/orangefs/file.c b/fs/orangefs/file.c
index a5a2fe76568f..3ab6e5126899 100644
--- a/fs/orangefs/file.c
+++ b/fs/orangefs/file.c
@@ -424,8 +424,8 @@ static ssize_t orangefs_file_write_iter(struct kiocb *iocb, struct iov_iter *ite

/* Make sure generic_write_checks sees an up to date inode size. */
if (file->f_flags & O_APPEND) {
- rc = orangefs_inode_getattr(file->f_mapping->host, 0, 1,
- STATX_SIZE);
+ rc = orangefs_inode_getattr(file->f_mapping->host,
+ ORANGEFS_GETATTR_SIZE);
if (rc == -ESTALE)
rc = -EIO;
if (rc) {
@@ -532,14 +532,13 @@ static vm_fault_t orangefs_fault(struct vm_fault *vmf)
{
struct file *file = vmf->vma->vm_file;
int ret;
-
- ret = orangefs_inode_getattr(file->f_mapping->host, 0, 1,
- STATX_SIZE);
+ ret = orangefs_inode_getattr(file->f_mapping->host,
+ ORANGEFS_GETATTR_SIZE);
if (ret == -ESTALE)
ret = -EIO;
if (ret) {
- gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
- __func__, ret);
+ gossip_err("%s: orangefs_inode_getattr failed, "
+ "ret:%d:.\n", __func__, ret);
return VM_FAULT_SIGBUS;
}
return filemap_fault(vmf);
@@ -660,8 +659,8 @@ static loff_t orangefs_file_llseek(struct file *file, loff_t offset, int origin)
* NOTE: We are only interested in file size here,
* so we set mask accordingly.
*/
- ret = orangefs_inode_getattr(file->f_mapping->host, 0, 1,
- STATX_SIZE);
+ ret = orangefs_inode_getattr(file->f_mapping->host,
+ ORANGEFS_GETATTR_SIZE);
if (ret == -ESTALE)
ret = -EIO;
if (ret) {
diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
index 2f1a5f36a103..067fd7111103 100644
--- a/fs/orangefs/inode.c
+++ b/fs/orangefs/inode.c
@@ -162,7 +162,7 @@ static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
iattr->ia_size);

/* Ensure that we have a up to date size, so we know if it changed. */
- ret = orangefs_inode_getattr(inode, 0, 1, STATX_SIZE);
+ ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
if (ret == -ESTALE)
ret = -EIO;
if (ret) {
@@ -256,7 +256,8 @@ int orangefs_getattr(const struct path *path, struct kstat *stat,
"orangefs_getattr: called on %pd\n",
path->dentry);

- ret = orangefs_inode_getattr(inode, 0, 0, request_mask);
+ ret = orangefs_inode_getattr(inode,
+ request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
if (ret == 0) {
generic_fillattr(inode, stat);

@@ -287,7 +288,7 @@ int orangefs_permission(struct inode *inode, int mask)
gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);

/* Make sure the permission (and other common attrs) are up to date. */
- ret = orangefs_inode_getattr(inode, 0, 0, STATX_MODE);
+ ret = orangefs_inode_getattr(inode, 0);
if (ret < 0)
return ret;

@@ -409,7 +410,7 @@ struct inode *orangefs_iget(struct super_block *sb,
if (!inode || !(inode->i_state & I_NEW))
return inode;

- error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);
+ error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
if (error) {
iget_failed(inode);
return ERR_PTR(error);
@@ -454,7 +455,7 @@ struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
orangefs_set_inode(inode, ref);
inode->i_ino = hash; /* needed for stat etc */

- error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);
+ error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
if (error)
goto out_iput;

diff --git a/fs/orangefs/orangefs-kernel.h b/fs/orangefs/orangefs-kernel.h
index 0c76b8899fd1..6b21ec59738c 100644
--- a/fs/orangefs/orangefs-kernel.h
+++ b/fs/orangefs/orangefs-kernel.h
@@ -192,7 +192,6 @@ struct orangefs_inode_s {
sector_t last_failed_block_index_read;

unsigned long getattr_time;
- u32 getattr_mask;

DECLARE_HASHTABLE(xattr_cache, 4);
};
@@ -396,8 +395,10 @@ int orangefs_inode_setxattr(struct inode *inode,
size_t size,
int flags);

-int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
- u32 request_mask);
+#define ORANGEFS_GETATTR_NEW 1
+#define ORANGEFS_GETATTR_SIZE 2
+
+int orangefs_inode_getattr(struct inode *, int);

int orangefs_inode_check_changed(struct inode *inode);

diff --git a/fs/orangefs/orangefs-utils.c b/fs/orangefs/orangefs-utils.c
index 804c8a261e4b..76f18a3494c7 100644
--- a/fs/orangefs/orangefs-utils.c
+++ b/fs/orangefs/orangefs-utils.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
* (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
*
* See COPYING in top-level directory.
*/
@@ -272,8 +273,7 @@ static int orangefs_inode_is_stale(struct inode *inode,
return 0;
}

-int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
- u32 request_mask)
+int orangefs_inode_getattr(struct inode *inode, int flags)
{
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
struct orangefs_kernel_op_s *new_op;
@@ -283,16 +283,9 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__,
get_khandle_from_ino(inode));

- if (!new && !bypass) {
- /*
- * Must have all the attributes in the mask and be within cache
- * time.
- */
- if ((request_mask & orangefs_inode->getattr_mask) ==
- request_mask &&
- time_before(jiffies, orangefs_inode->getattr_time))
- return 0;
- }
+ /* Must have all the attributes in the mask and be within cache time. */
+ if (!flags && time_before(jiffies, orangefs_inode->getattr_time))
+ return 0;

new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
if (!new_op)
@@ -302,7 +295,7 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
* Size is the hardest attribute to get. The incremental cost of any
* other attribute is essentially zero.
*/
- if (request_mask & STATX_SIZE || new)
+ if (flags)
new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_ALL_NOHINT;
else
new_op->upcall.req.getattr.mask =
@@ -313,7 +306,7 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
if (ret != 0)
goto out;

- if (!new) {
+ if (!(flags & ORANGEFS_GETATTR_NEW)) {
ret = orangefs_inode_is_stale(inode,
&new_op->downcall.resp.getattr.attributes,
new_op->downcall.resp.getattr.link_target);
@@ -329,7 +322,7 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
case S_IFREG:
inode->i_flags = orangefs_inode_flags(&new_op->
downcall.resp.getattr.attributes);
- if (request_mask & STATX_SIZE || new) {
+ if (flags) {
inode_size = (loff_t)new_op->
downcall.resp.getattr.attributes.size;
inode->i_size = inode_size;
@@ -343,7 +336,7 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
}
break;
case S_IFDIR:
- if (request_mask & STATX_SIZE || new) {
+ if (flags) {
inode->i_size = PAGE_SIZE;
spin_lock(&inode->i_lock);
inode_set_bytes(inode, inode->i_size);
@@ -352,7 +345,7 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
set_nlink(inode, 1);
break;
case S_IFLNK:
- if (new) {
+ if (flags & ORANGEFS_GETATTR_NEW) {
inode->i_size = (loff_t)strlen(new_op->
downcall.resp.getattr.link_target);
ret = strscpy(orangefs_inode->link_target,
@@ -393,10 +386,6 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,

orangefs_inode->getattr_time = jiffies +
orangefs_getattr_timeout_msecs*HZ/1000;
- if (request_mask & STATX_SIZE || new)
- orangefs_inode->getattr_mask = STATX_BASIC_STATS;
- else
- orangefs_inode->getattr_mask = STATX_BASIC_STATS & ~STATX_SIZE;
ret = 0;
out:
op_release(new_op);
--
2.19.0
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