Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * (C) 2001 Clemson University and The University of Chicago
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright 2018 Omnibond Systems, L.L.C.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * See COPYING in top-level directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *  Linux VFS extended attribute operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include "protocol.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "orangefs-kernel.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "orangefs-bufmap.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/posix_acl_xattr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/xattr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/hashtable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define SYSTEM_ORANGEFS_KEY "system.pvfs2."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define SYSTEM_ORANGEFS_KEY_LEN 13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * this function returns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  *   0 if the key corresponding to name is not meant to be printed as part
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  *     of a listxattr.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  *   1 if the key corresponding to name is meant to be returned as part of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  *     a listxattr.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * The ones that start SYSTEM_ORANGEFS_KEY are the ones to avoid printing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) static int is_reserved_key(const char *key, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	if (size < SYSTEM_ORANGEFS_KEY_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	return strncmp(key, SYSTEM_ORANGEFS_KEY, SYSTEM_ORANGEFS_KEY_LEN) ?  1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) static inline int convert_to_internal_xattr_flags(int setxattr_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	int internal_flag = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	if (setxattr_flags & XATTR_REPLACE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		/* Attribute must exist! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		internal_flag = ORANGEFS_XATTR_REPLACE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	} else if (setxattr_flags & XATTR_CREATE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		/* Attribute must not exist */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		internal_flag = ORANGEFS_XATTR_CREATE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	return internal_flag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) static unsigned int xattr_key(const char *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	unsigned int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	while (key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		i += *key++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	return i % 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static struct orangefs_cached_xattr *find_cached_xattr(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)     const char *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	struct orangefs_cached_xattr *cx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct hlist_head *h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	struct hlist_node *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	h = &orangefs_inode->xattr_cache[xattr_key(key)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	if (hlist_empty(h))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	hlist_for_each_entry_safe(cx, tmp, h, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) /*		if (!time_before(jiffies, cx->timeout)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 			hlist_del(&cx->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 			kfree(cx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		}*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		if (!strcmp(cx->key, key))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			return cx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85)  * Tries to get a specified key's attributes of a given
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86)  * file into a user-specified buffer. Note that the getxattr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87)  * interface allows for the users to probe the size of an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  * extended attribute by passing in a value of 0 to size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89)  * Thus our return value is always the size of the attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90)  * unless the key does not exist for the file and/or if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91)  * there were errors in fetching the attribute value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) ssize_t orangefs_inode_getxattr(struct inode *inode, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				void *buffer, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct orangefs_kernel_op_s *new_op = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	struct orangefs_cached_xattr *cx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	ssize_t ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	ssize_t length = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	int fsuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	int fsgid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		     "%s: name %s, buffer_size %zd\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		     __func__, name, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	if (S_ISLNK(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	fsuid = from_kuid(&init_user_ns, current_fsuid());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	fsgid = from_kgid(&init_user_ns, current_fsgid());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		     "getxattr on inode %pU, name %s "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		     "(uid %o, gid %o)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		     get_khandle_from_ino(inode),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		     name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		     fsuid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		     fsgid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	down_read(&orangefs_inode->xattr_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	cx = find_cached_xattr(inode, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	if (cx && time_before(jiffies, cx->timeout)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		if (cx->length == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			ret = -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			if (size == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 				ret = cx->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 				goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			if (cx->length > size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 				ret = -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 				goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			memcpy(buffer, cx->val, cx->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			memset(buffer + cx->length, 0, size - cx->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 			ret = cx->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	new_op = op_alloc(ORANGEFS_VFS_OP_GETXATTR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	if (!new_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	new_op->upcall.req.getxattr.refn = orangefs_inode->refn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	strcpy(new_op->upcall.req.getxattr.key, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	 * NOTE: Although keys are meant to be NULL terminated textual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	 * strings, I am going to explicitly pass the length just in case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	 * we change this later on...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	new_op->upcall.req.getxattr.key_sz = strlen(name) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	ret = service_operation(new_op, "orangefs_inode_getxattr",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 				get_interruptible_flag(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	if (ret != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		if (ret == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			ret = -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 				     "orangefs_inode_getxattr: inode %pU key %s"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 				     " does not exist!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 				     get_khandle_from_ino(inode),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 				     (char *)new_op->upcall.req.getxattr.key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			cx = kmalloc(sizeof *cx, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			if (cx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 				strcpy(cx->key, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 				cx->length = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 				cx->timeout = jiffies +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 				    orangefs_getattr_timeout_msecs*HZ/1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 				hash_add(orangefs_inode->xattr_cache, &cx->node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 				    xattr_key(cx->key));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		goto out_release_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	 * Length returned includes null terminator.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	length = new_op->downcall.resp.getxattr.val_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	 * Just return the length of the queried attribute.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (size == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		ret = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		goto out_release_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	 * Check to see if key length is > provided buffer size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	if (length > size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		ret = -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		goto out_release_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	memcpy(buffer, new_op->downcall.resp.getxattr.val, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	memset(buffer + length, 0, size - length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	     "orangefs_inode_getxattr: inode %pU "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	     "key %s key_sz %d, val_len %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	     get_khandle_from_ino(inode),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	     (char *)new_op->
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		upcall.req.getxattr.key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		     (int)new_op->
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		upcall.req.getxattr.key_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	     (int)ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	ret = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	if (cx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		strcpy(cx->key, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		memcpy(cx->val, buffer, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		cx->length = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		cx->timeout = jiffies + HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		cx = kmalloc(sizeof *cx, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		if (cx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 			strcpy(cx->key, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 			memcpy(cx->val, buffer, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 			cx->length = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 			cx->timeout = jiffies + HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			hash_add(orangefs_inode->xattr_cache, &cx->node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 			    xattr_key(cx->key));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) out_release_op:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	op_release(new_op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	up_read(&orangefs_inode->xattr_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static int orangefs_inode_removexattr(struct inode *inode, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 				      int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	struct orangefs_kernel_op_s *new_op = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	struct orangefs_cached_xattr *cx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	struct hlist_head *h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	struct hlist_node *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	int ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	down_write(&orangefs_inode->xattr_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	new_op = op_alloc(ORANGEFS_VFS_OP_REMOVEXATTR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	if (!new_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	new_op->upcall.req.removexattr.refn = orangefs_inode->refn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	 * NOTE: Although keys are meant to be NULL terminated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	 * textual strings, I am going to explicitly pass the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	 * length just in case we change this later on...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	strcpy(new_op->upcall.req.removexattr.key, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	new_op->upcall.req.removexattr.key_sz = strlen(name) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		     "orangefs_inode_removexattr: key %s, key_sz %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		     (char *)new_op->upcall.req.removexattr.key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		     (int)new_op->upcall.req.removexattr.key_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	ret = service_operation(new_op,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 				"orangefs_inode_removexattr",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 				get_interruptible_flag(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	if (ret == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		 * Request to replace a non-existent attribute is an error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		if (flags & XATTR_REPLACE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 			ret = -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 			ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		     "orangefs_inode_removexattr: returning %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	op_release(new_op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	h = &orangefs_inode->xattr_cache[xattr_key(name)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	hlist_for_each_entry_safe(cx, tmp, h, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		if (!strcmp(cx->key, name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			hlist_del(&cx->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 			kfree(cx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	up_write(&orangefs_inode->xattr_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)  * Tries to set an attribute for a given key on a file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)  * Returns a -ve number on error and 0 on success.  Key is text, but value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)  * can be binary!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) int orangefs_inode_setxattr(struct inode *inode, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 			    const void *value, size_t size, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	struct orangefs_kernel_op_s *new_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	int internal_flag = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	struct orangefs_cached_xattr *cx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	struct hlist_head *h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	struct hlist_node *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	int ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		     "%s: name %s, buffer_size %zd\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		     __func__, name, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	if (size > ORANGEFS_MAX_XATTR_VALUELEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	internal_flag = convert_to_internal_xattr_flags(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	/* This is equivalent to a removexattr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	if (size == 0 && !value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 			     "removing xattr (%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 			     name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		return orangefs_inode_removexattr(inode, name, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		     "setxattr on inode %pU, name %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		     get_khandle_from_ino(inode),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		     name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	down_write(&orangefs_inode->xattr_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	new_op = op_alloc(ORANGEFS_VFS_OP_SETXATTR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	if (!new_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	new_op->upcall.req.setxattr.refn = orangefs_inode->refn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	new_op->upcall.req.setxattr.flags = internal_flag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	 * NOTE: Although keys are meant to be NULL terminated textual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	 * strings, I am going to explicitly pass the length just in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	 * case we change this later on...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	strcpy(new_op->upcall.req.setxattr.keyval.key, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	new_op->upcall.req.setxattr.keyval.key_sz = strlen(name) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	memcpy(new_op->upcall.req.setxattr.keyval.val, value, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	new_op->upcall.req.setxattr.keyval.val_sz = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		     "orangefs_inode_setxattr: key %s, key_sz %d "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 		     " value size %zd\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 		     (char *)new_op->upcall.req.setxattr.keyval.key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 		     (int)new_op->upcall.req.setxattr.keyval.key_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 		     size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	ret = service_operation(new_op,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 				"orangefs_inode_setxattr",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 				get_interruptible_flag(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	gossip_debug(GOSSIP_XATTR_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 		     "orangefs_inode_setxattr: returning %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 		     ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	/* when request is serviced properly, free req op struct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	op_release(new_op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	h = &orangefs_inode->xattr_cache[xattr_key(name)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	hlist_for_each_entry_safe(cx, tmp, h, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 		if (!strcmp(cx->key, name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 			hlist_del(&cx->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 			kfree(cx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	up_write(&orangefs_inode->xattr_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)  * Tries to get a specified object's keys into a user-specified buffer of a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)  * given size.  Note that like the previous instances of xattr routines, this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)  * also allows you to pass in a NULL pointer and 0 size to probe the size for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)  * subsequent memory allocations. Thus our return value is always the size of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)  * all the keys unless there were errors in fetching the keys!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	struct inode *inode = dentry->d_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	struct orangefs_kernel_op_s *new_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	__u64 token = ORANGEFS_ITERATE_START;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	ssize_t ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	ssize_t total = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	int count_keys = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	int key_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	int returned_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	if (size > 0 && !buffer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		gossip_err("%s: bogus NULL pointers\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	down_read(&orangefs_inode->xattr_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	new_op = op_alloc(ORANGEFS_VFS_OP_LISTXATTR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	if (!new_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 		goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	if (buffer && size > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 		memset(buffer, 0, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) try_again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 	key_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	new_op->upcall.req.listxattr.refn = orangefs_inode->refn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	new_op->upcall.req.listxattr.token = token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 	new_op->upcall.req.listxattr.requested_count =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	    (size == 0) ? 0 : ORANGEFS_MAX_XATTR_LISTLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	ret = service_operation(new_op, __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 				get_interruptible_flag(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 	if (ret != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	if (size == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 		 * This is a bit of a big upper limit, but I did not want to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 		 * spend too much time getting this correct, since users end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 		 * up allocating memory rather than us...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 		total = new_op->downcall.resp.listxattr.returned_count *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 			ORANGEFS_MAX_XATTR_NAMELEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	returned_count = new_op->downcall.resp.listxattr.returned_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 	if (returned_count < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 	    returned_count > ORANGEFS_MAX_XATTR_LISTLEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 		gossip_err("%s: impossible value for returned_count:%d:\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 		__func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 		returned_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 		ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 	 * Check to see how much can be fit in the buffer. Fit only whole keys.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 	for (i = 0; i < returned_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 		if (new_op->downcall.resp.listxattr.lengths[i] < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 		    new_op->downcall.resp.listxattr.lengths[i] >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 		    ORANGEFS_MAX_XATTR_NAMELEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 			gossip_err("%s: impossible value for lengths[%d]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 			    __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 			    new_op->downcall.resp.listxattr.lengths[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 			ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 			goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 		if (total + new_op->downcall.resp.listxattr.lengths[i] > size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 			goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 		 * Since many dumb programs try to setxattr() on our reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 		 * xattrs this is a feeble attempt at defeating those by not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 		 * listing them in the output of listxattr.. sigh
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 		if (is_reserved_key(new_op->downcall.resp.listxattr.key +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 				    key_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 				    new_op->downcall.resp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 					listxattr.lengths[i])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 			gossip_debug(GOSSIP_XATTR_DEBUG, "Copying key %d -> %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 					i, new_op->downcall.resp.listxattr.key +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 						key_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 			memcpy(buffer + total,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 				new_op->downcall.resp.listxattr.key + key_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 				new_op->downcall.resp.listxattr.lengths[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 			total += new_op->downcall.resp.listxattr.lengths[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 			count_keys++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 			gossip_debug(GOSSIP_XATTR_DEBUG, "[RESERVED] key %d -> %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) 					i, new_op->downcall.resp.listxattr.key +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 						key_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) 		key_size += new_op->downcall.resp.listxattr.lengths[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 	 * Since the buffer was large enough, we might have to continue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 	 * fetching more keys!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 	token = new_op->downcall.resp.listxattr.token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 	if (token != ORANGEFS_ITERATE_END)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) 		goto try_again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 	gossip_debug(GOSSIP_XATTR_DEBUG, "%s: returning %d"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 		     " [size of buffer %ld] (filled in %d keys)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) 		     __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 		     ret ? (int)ret : (int)total,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) 		     (long)size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 		     count_keys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) 	op_release(new_op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) 	if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) 		ret = total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) 	up_read(&orangefs_inode->xattr_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) static int orangefs_xattr_set_default(const struct xattr_handler *handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) 				      struct dentry *unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) 				      struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) 				      const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) 				      const void *buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) 				      size_t size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) 				      int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) 	return orangefs_inode_setxattr(inode, name, buffer, size, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) static int orangefs_xattr_get_default(const struct xattr_handler *handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) 				      struct dentry *unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) 				      struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) 				      const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) 				      void *buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) 				      size_t size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) 				      int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) 	return orangefs_inode_getxattr(inode, name, buffer, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) static const struct xattr_handler orangefs_xattr_default_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) 	.prefix = "",  /* match any name => handlers called with full name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) 	.get = orangefs_xattr_get_default,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) 	.set = orangefs_xattr_set_default,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) const struct xattr_handler *orangefs_xattr_handlers[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) 	&posix_acl_access_xattr_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) 	&posix_acl_default_xattr_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) 	&orangefs_xattr_default_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) };