[RFC PATCH 19/35] NFSv4.2: call the xattr cache functions

Frank van der Linden
2019-09-12T17:28:59Z

Call the xattr caching functions from the nfs42_proc_*xattr functions
to query/add/remove extended attributes.

Signed-off-by: Frank van der Linden <fllinden@amazon.com>
---
fs/nfs/nfs4proc.c | 36 ++++++++++++++++++++++++++++++------
fs/nfs/nfs4super.c | 1 +
2 files changed, 31 insertions(+), 6 deletions(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 36cca076ccdb..6d4758c35760 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7326,6 +7326,7 @@ static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler,
size_t buflen, int flags)
{
struct nfs_access_entry cache;
+ int ret;

if (!nfs_server_capable(inode, NFS_CAP_XATTR))
return -EOPNOTSUPP;
@@ -7344,10 +7345,17 @@ static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler,
return -EACCES;
}

- if (buf == NULL)
- return nfs42_proc_removexattr(inode, key);
- else
- return nfs42_proc_setxattr(inode, key, buf, buflen, flags);
+ if (buf == NULL) {
+ ret = nfs42_proc_removexattr(inode, key);
+ if (!ret)
+ nfs4_xattr_cache_remove(inode, key);
+ } else {
+ ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags);
+ if (!ret)
+ nfs4_xattr_cache_add(inode, key, buf, buflen);
+ }
+
+ return ret;
}

static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler,
@@ -7355,6 +7363,7 @@ static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler,
const char *key, void *buf, size_t buflen)
{
struct nfs_access_entry cache;
+ ssize_t ret;

if (!nfs_server_capable(inode, NFS_CAP_XATTR))
return -EOPNOTSUPP;
@@ -7364,7 +7373,15 @@ static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler,
return -EACCES;
}

- return nfs42_proc_getxattr(inode, key, buf, buflen);
+ ret = nfs4_xattr_cache_get(inode, key, buf, buflen);
+ if (ret >= 0 || (ret < 0 && ret != -ENOENT))
+ return ret;
+
+ ret = nfs42_proc_getxattr(inode, key, buf, buflen);
+ if (ret >= 0)
+ nfs4_xattr_cache_add(inode, key, buf, ret);
+
+ return ret;
}

static ssize_t
@@ -7372,7 +7389,7 @@ nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
{
u64 cookie;
bool eof;
- int ret, size;
+ ssize_t ret, size;
char *buf;
size_t buflen;
struct nfs_access_entry cache;
@@ -7385,6 +7402,10 @@ nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
return 0;
}

+ ret = nfs4_xattr_cache_list(inode, list, list_len);
+ if (ret >= 0 || (ret < 0 && ret != -ENOENT))
+ return ret;
+
cookie = 0;
eof = false;
buflen = list_len ? list_len : XATTR_LIST_MAX;
@@ -7404,6 +7425,9 @@ nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
size += ret;
}

+ if (list_len)
+ nfs4_xattr_cache_set_list(inode, list, size);
+
return size;
}

diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 04c57066a11a..5c2cb5505ec7 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -99,6 +99,7 @@ static void nfs4_evict_inode(struct inode *inode)
pnfs_destroy_layout(NFS_I(inode));
/* First call standard NFS clear_inode() code */
nfs_clear_inode(inode);
+ nfs4_xattr_cache_zap(inode);
}

/*
--
2.17.2