[PATCH 14/33] xfs: pass an initialized xfs_da_args structure to xfs_attr_set

Christoph Hellwig
2019-12-12T10:55:13Z

Instead of converting from one style of arguments to another in
xfs_attr_set, pass the structure from higher up in the call chain.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/libxfs/xfs_attr.c | 66 ++++++++++++++++++----------------------
fs/xfs/libxfs/xfs_attr.h | 3 +-
fs/xfs/xfs_acl.c | 31 ++++++++++---------
fs/xfs/xfs_ioctl.c | 18 +++++++----
fs/xfs/xfs_iops.c | 11 +++++--
fs/xfs/xfs_xattr.c | 19 +++++++-----
6 files changed, 80 insertions(+), 68 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 31cc42c46437..ed23ffef8a6e 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -329,16 +329,12 @@ xfs_attr_remove_args(

int
xfs_attr_set(
- struct xfs_inode *dp,
- const unsigned char *name,
- unsigned char *value,
- int valuelen,
- int flags)
+ struct xfs_da_args *args)
{
+ struct xfs_inode *dp = args->dp;
struct xfs_mount *mp = dp->i_mount;
- struct xfs_da_args args;
struct xfs_trans_res tres;
- int rsvd = (flags & ATTR_ROOT) != 0;
+ int rsvd = (args->flags & ATTR_ROOT) != 0;
int error, local;
unsigned int total;

@@ -349,25 +345,22 @@ xfs_attr_set(
if (error)
return error;

- error = xfs_attr_args_init(&args, dp, name, flags);
- if (error)
- return error;
-
- args.value = value;
- args.valuelen = valuelen;
+ args->geo = mp->m_attr_geo;
+ args->whichfork = XFS_ATTR_FORK;
+ args->hashval = xfs_da_hashname(args->name, args->namelen);

/*
* We have no control over the attribute names that userspace passes us
* to remove, so we have to allow the name lookup prior to attribute
* removal to fail as well.
*/
- args.op_flags = XFS_DA_OP_OKNOENT;
+ args->op_flags = XFS_DA_OP_OKNOENT;

- if (value) {
+ if (args->value) {
XFS_STATS_INC(mp, xs_attr_set);

- args.op_flags |= XFS_DA_OP_ADDNAME;
- args.total = xfs_attr_calc_size(&args, &local);
+ args->op_flags |= XFS_DA_OP_ADDNAME;
+ args->total = xfs_attr_calc_size(args, &local);

/*
* If the inode doesn't have an attribute fork, add one.
@@ -375,8 +368,8 @@ xfs_attr_set(
*/
if (XFS_IFORK_Q(dp) == 0) {
int sf_size = sizeof(struct xfs_attr_sf_hdr) +
- XFS_ATTR_SF_ENTSIZE_BYNAME(args.namelen,
- valuelen);
+ XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen,
+ args->valuelen);

error = xfs_bmap_add_attrfork(dp, sf_size, rsvd);
if (error)
@@ -384,10 +377,11 @@ xfs_attr_set(
}

tres.tr_logres = M_RES(mp)->tr_attrsetm.tr_logres +
- M_RES(mp)->tr_attrsetrt.tr_logres * args.total;
+ M_RES(mp)->tr_attrsetrt.tr_logres *
+ args->total;
tres.tr_logcount = XFS_ATTRSET_LOG_COUNT;
tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
- total = args.total;
+ total = args->total;
} else {
XFS_STATS_INC(mp, xs_attr_remove);

@@ -400,29 +394,29 @@ xfs_attr_set(
* operation if necessary
*/
error = xfs_trans_alloc(mp, &tres, total, 0,
- rsvd ? XFS_TRANS_RESERVE : 0, &args.trans);
+ rsvd ? XFS_TRANS_RESERVE : 0, &args->trans);
if (error)
return error;

xfs_ilock(dp, XFS_ILOCK_EXCL);
- xfs_trans_ijoin(args.trans, dp, 0);
- if (value) {
+ xfs_trans_ijoin(args->trans, dp, 0);
+ if (args->value) {
unsigned int quota_flags = XFS_QMOPT_RES_REGBLKS;

if (rsvd)
quota_flags |= XFS_QMOPT_FORCE_RES;
- error = xfs_trans_reserve_quota_nblks(args.trans, dp,
- args.total, 0, quota_flags);
+ error = xfs_trans_reserve_quota_nblks(args->trans, dp,
+ args->total, 0, quota_flags);
if (error)
goto out_trans_cancel;
- error = xfs_attr_set_args(&args);
+ error = xfs_attr_set_args(args);
if (error)
goto out_trans_cancel;
/* shortform attribute has already been committed */
- if (!args.trans)
+ if (!args->trans)
goto out_unlock;
} else {
- error = xfs_attr_remove_args(&args);
+ error = xfs_attr_remove_args(args);
if (error)
goto out_trans_cancel;
}
@@ -432,23 +426,23 @@ xfs_attr_set(
* transaction goes to disk before returning to the user.
*/
if (mp->m_flags & XFS_MOUNT_WSYNC)
- xfs_trans_set_sync(args.trans);
+ xfs_trans_set_sync(args->trans);

- if ((flags & ATTR_KERNOTIME) == 0)
- xfs_trans_ichgtime(args.trans, dp, XFS_ICHGTIME_CHG);
+ if ((args->flags & ATTR_KERNOTIME) == 0)
+ xfs_trans_ichgtime(args->trans, dp, XFS_ICHGTIME_CHG);

/*
* Commit the last in the sequence of transactions.
*/
- xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE);
- error = xfs_trans_commit(args.trans);
+ xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
+ error = xfs_trans_commit(args->trans);
out_unlock:
xfs_iunlock(dp, XFS_ILOCK_EXCL);
return error;

out_trans_cancel:
- if (args.trans)
- xfs_trans_cancel(args.trans);
+ if (args->trans)
+ xfs_trans_cancel(args->trans);
goto out_unlock;
}

diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index 1ffe8653509e..029563f10cc2 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -148,8 +148,7 @@ int xfs_inode_hasattr(struct xfs_inode *ip);
int xfs_attr_get_ilocked(struct xfs_inode *ip, struct xfs_da_args *args);
int xfs_attr_get(struct xfs_inode *ip, const unsigned char *name,
unsigned char **value, int *valuelenp, int flags);
-int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name,
- unsigned char *value, int valuelen, int flags);
+int xfs_attr_set(struct xfs_da_args *args);
int xfs_attr_set_args(struct xfs_da_args *args);
int xfs_attr_remove_args(struct xfs_da_args *args);
int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index fccaeb3371a4..32573ed0d566 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -165,41 +165,42 @@ xfs_get_acl(struct inode *inode, int type)
int
__xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
- struct xfs_inode *ip = XFS_I(inode);
- unsigned char *ea_name;
- struct xfs_acl *xfs_acl = NULL;
- int len = 0;
- int error;
+ struct xfs_inode *ip = XFS_I(inode);
+ struct xfs_da_args args = {
+ .dp = ip,
+ .flags = ATTR_ROOT,
+ };
+ int error;

switch (type) {
case ACL_TYPE_ACCESS:
- ea_name = SGI_ACL_FILE;
+ args.name = SGI_ACL_FILE;
break;
case ACL_TYPE_DEFAULT:
if (!S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
- ea_name = SGI_ACL_DEFAULT;
+ args.name = SGI_ACL_DEFAULT;
break;
default:
return -EINVAL;
}
+ args.namelen = strlen(args.name);

if (acl) {
- len = XFS_ACL_MAX_SIZE(ip->i_mount);
- xfs_acl = kmem_zalloc_large(len, 0);
- if (!xfs_acl)
+ args.valuelen = XFS_ACL_MAX_SIZE(ip->i_mount);
+ args.value = kmem_zalloc_large(args.valuelen, 0);
+ if (!args.value)
return -ENOMEM;

- xfs_acl_to_disk(xfs_acl, acl);
+ xfs_acl_to_disk(args.value, acl);

/* subtract away the unused acl entries */
- len -= sizeof(struct xfs_acl_entry) *
+ args.valuelen -= sizeof(struct xfs_acl_entry) *
(XFS_ACL_MAX_ENTRIES(ip->i_mount) - acl->a_count);
}

- error = xfs_attr_set(ip, ea_name, (unsigned char *)xfs_acl, len,
- ATTR_ROOT);
- kmem_free(xfs_acl);
+ error = xfs_attr_set(&args);
+ kmem_free(args.value);

/*
* If the attribute didn't exist to start with that's fine.
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index beb0ca76fb55..848446628d9b 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -384,7 +384,12 @@ xfs_attrmulti_attr_set(
uint32_t len,
uint32_t flags)
{
- unsigned char *kbuf = NULL;
+ struct xfs_da_args args = {
+ .dp = XFS_I(inode),
+ .flags = flags,
+ .name = name,
+ .namelen = strlen(name),
+ };
int error;

if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
@@ -393,15 +398,16 @@ xfs_attrmulti_attr_set(
if (ubuf) {
if (len > XFS_XATTR_SIZE_MAX)
return -EINVAL;
- kbuf = memdup_user(ubuf, len);
- if (IS_ERR(kbuf))
- return PTR_ERR(kbuf);
+ args.value = memdup_user(ubuf, len);
+ if (IS_ERR(args.value))
+ return PTR_ERR(args.value);
+ args.valuelen = len;
}

- error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
+ error = xfs_attr_set(&args);
if (!error)
xfs_forget_acl(inode, name, flags);
- kfree(kbuf);
+ kfree(args.value);
return error;
}

diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 8afe69ca188b..94cd4254656c 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -50,8 +50,15 @@ xfs_initxattrs(
int error = 0;

for (xattr = xattr_array; xattr->name != NULL; xattr++) {
- error = xfs_attr_set(ip, xattr->name, xattr->value,
- xattr->value_len, ATTR_SECURE);
+ struct xfs_da_args args = {
+ .dp = ip,
+ .flags = ATTR_SECURE,
+ .name = xattr->name,
+ .namelen = strlen(xattr->name),
+ .value = xattr->value,
+ .valuelen = xattr->value_len,
+ };
+ error = xfs_attr_set(&args);
if (error < 0)
break;
}
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index 7406b8a49dc7..1ba9a8b78d0e 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -64,20 +64,25 @@ xfs_xattr_set(const struct xattr_handler *handler, struct dentry *unused,
struct inode *inode, const char *name, const void *value,
size_t size, int flags)
{
- int xflags = handler->flags;
- struct xfs_inode *ip = XFS_I(inode);
+ struct xfs_da_args args = {
+ .dp = XFS_I(inode),
+ .flags = handler->flags,
+ .name = name,
+ .namelen = strlen(name),
+ .value = (unsigned char *)value,
+ .valuelen = size,
+ };
int error;

/* Convert Linux syscall to XFS internal ATTR flags */
if (flags & XATTR_CREATE)
- xflags |= ATTR_CREATE;
+ args.flags |= ATTR_CREATE;
if (flags & XATTR_REPLACE)
- xflags |= ATTR_REPLACE;
+ args.flags |= ATTR_REPLACE;

- error = xfs_attr_set(ip, (unsigned char *)name,
- (void *)value, size, xflags);
+ error = xfs_attr_set(&args);
if (!error)
- xfs_forget_acl(inode, name, xflags);
+ xfs_forget_acl(inode, name, args.flags);
return error;
}

--
2.20.1