unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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orangefs: Implement inode_operations->permission().

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Thus d_revalidate is not obliged to check on as much, which will
eventually lead the way to hammering the filesystem servers much less.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
This commit is contained in:
Martin Brandenburg 2016-01-30 13:46:54 -05:00 committed by Mike Marshall
parent fe88adc366
commit 933287da75
6 changed files with 34 additions and 1 deletions
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3
fs/orangefs/dcache.c
View file

@ -119,8 +119,9 @@ static int orangefs_d_revalidate(struct dentry *dentry, unsigned int flags)
goto out;
/* Now we must perform a getattr to validate the inode contents. */
ret = orangefs_inode_getattr(dentry->d_inode,
ORANGEFS_ATTR_SYS_ALL_NOHINT, 1);
ORANGEFS_ATTR_SYS_TYPE|ORANGEFS_ATTR_SYS_LNK_TARGET, 1);
if (ret < 0) {
gossip_debug(GOSSIP_DCACHE_DEBUG, "%s:%s:%d getattr failure.\n",
__FILE__, __func__, __LINE__);

19
fs/orangefs/inode.c
View file

@ -291,6 +291,24 @@ int orangefs_getattr(struct vfsmount *mnt,
return ret;
}
int orangefs_permission(struct inode *inode, int mask)
{
int ret;
if (mask & MAY_NOT_BLOCK)
return -ECHILD;
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,
ORANGEFS_ATTR_SYS_ALL_NOHINT_NOSIZE, 0);
if (ret < 0)
return ret;
return generic_permission(inode, mask);
}
/* ORANGEDS2 implementation of VFS inode operations for files */
struct inode_operations orangefs_file_inode_operations = {
.get_acl = orangefs_get_acl,
@ -301,6 +319,7 @@ struct inode_operations orangefs_file_inode_operations = {
.getxattr = generic_getxattr,
.listxattr = orangefs_listxattr,
.removexattr = generic_removexattr,
.permission = orangefs_permission,
};
static int orangefs_init_iops(struct inode *inode)

1
fs/orangefs/namei.c
View file

@ -443,4 +443,5 @@ struct inode_operations orangefs_dir_inode_operations = {
.getxattr = generic_getxattr,
.removexattr = generic_removexattr,
.listxattr = orangefs_listxattr,
.permission = orangefs_permission,
};

2
fs/orangefs/orangefs-kernel.h
View file

@ -493,6 +493,8 @@ int orangefs_getattr(struct vfsmount *mnt,
struct dentry *dentry,
struct kstat *kstat);
int orangefs_permission(struct inode *inode, int mask);
/*
* defined in xattr.c
*/

9
fs/orangefs/protocol.h
View file

@ -205,6 +205,15 @@ typedef __s64 ORANGEFS_offset;
ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT | \
ORANGEFS_ATTR_SYS_DIRENT_COUNT | \
ORANGEFS_ATTR_SYS_BLKSIZE)
#define ORANGEFS_ATTR_SYS_ALL_NOHINT_NOSIZE \
(ORANGEFS_ATTR_SYS_COMMON_ALL | \
ORANGEFS_ATTR_SYS_LNK_TARGET | \
ORANGEFS_ATTR_SYS_DFILE_COUNT | \
ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT | \
ORANGEFS_ATTR_SYS_DIRENT_COUNT | \
ORANGEFS_ATTR_SYS_BLKSIZE)
#define ORANGEFS_XATTR_REPLACE 0x2
#define ORANGEFS_XATTR_CREATE 0x1
#define ORANGEFS_MAX_SERVER_ADDR_LEN 256

1
fs/orangefs/symlink.c
View file

@ -28,4 +28,5 @@ struct inode_operations orangefs_symlink_inode_operations = {
.getattr = orangefs_getattr,
.listxattr = orangefs_listxattr,
.setxattr = generic_setxattr,
.permission = orangefs_permission,
};