Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  *   fs/cifs/fscache.c - CIFS filesystem cache interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *   Copyright (c) 2010 Novell, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *   Author(s): Suresh Jayaraman <sjayaraman@suse.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *   This library is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *   it under the terms of the GNU Lesser General Public License as published
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *   by the Free Software Foundation; either version 2.1 of the License, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *   (at your option) any later version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *   This library is distributed in the hope that it will be useful,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *   the GNU Lesser General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *   You should have received a copy of the GNU Lesser General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *   along with this library; if not, write to the Free Software
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include "fscache.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include "cifsglob.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include "cifs_debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include "cifs_fs_sb.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * Key layout of CIFS server cache index object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) struct cifs_server_key {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		uint16_t	family;		/* address family */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		__be16		port;		/* IP port */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	} hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		struct in_addr	ipv4_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		struct in6_addr	ipv6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * Get a cookie for a server object keyed by {IPaddress,port,family} tuple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	const struct sockaddr *sa = (struct sockaddr *) &server->dstaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	const struct sockaddr_in *addr = (struct sockaddr_in *) sa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	const struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) sa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct cifs_server_key key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	uint16_t key_len = sizeof(key.hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	memset(&key, 0, sizeof(key));
^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) 	 * Should not be a problem as sin_family/sin6_family overlays
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	 * sa_family field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	key.hdr.family = sa->sa_family;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	switch (sa->sa_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		key.hdr.port = addr->sin_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		key.ipv4_addr = addr->sin_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		key_len += sizeof(key.ipv4_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		key.hdr.port = addr6->sin6_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		key.ipv6_addr = addr6->sin6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		key_len += sizeof(key.ipv6_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		cifs_dbg(VFS, "Unknown network family '%d'\n", sa->sa_family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		server->fscache = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	server->fscache =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		fscache_acquire_cookie(cifs_fscache_netfs.primary_index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 				       &cifs_fscache_server_index_def,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 				       &key, key_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 				       NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 				       server, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		 __func__, server, server->fscache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) void cifs_fscache_release_client_cookie(struct TCP_Server_Info *server)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		 __func__, server, server->fscache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	fscache_relinquish_cookie(server->fscache, NULL, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	server->fscache = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct TCP_Server_Info *server = tcon->ses->server;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	char *sharename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	struct cifs_fscache_super_auxdata auxdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	sharename = extract_sharename(tcon->treeName);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (IS_ERR(sharename)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		cifs_dbg(FYI, "%s: couldn't extract sharename\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		tcon->fscache = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	memset(&auxdata, 0, sizeof(auxdata));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	auxdata.resource_id = tcon->resource_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	auxdata.vol_create_time = tcon->vol_create_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	auxdata.vol_serial_number = tcon->vol_serial_number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	tcon->fscache =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		fscache_acquire_cookie(server->fscache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 				       &cifs_fscache_super_index_def,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 				       sharename, strlen(sharename),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 				       &auxdata, sizeof(auxdata),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 				       tcon, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	kfree(sharename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		 __func__, server->fscache, tcon->fscache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct cifs_fscache_super_auxdata auxdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	memset(&auxdata, 0, sizeof(auxdata));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	auxdata.resource_id = tcon->resource_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	auxdata.vol_create_time = tcon->vol_create_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	auxdata.vol_serial_number = tcon->vol_serial_number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	fscache_relinquish_cookie(tcon->fscache, &auxdata, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	tcon->fscache = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static void cifs_fscache_acquire_inode_cookie(struct cifsInodeInfo *cifsi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 					      struct cifs_tcon *tcon)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	struct cifs_fscache_inode_auxdata auxdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	memset(&auxdata, 0, sizeof(auxdata));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	auxdata.eof = cifsi->server_eof;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	cifsi->fscache =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		fscache_acquire_cookie(tcon->fscache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 				       &cifs_fscache_inode_object_def,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 				       &cifsi->uniqueid, sizeof(cifsi->uniqueid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 				       &auxdata, sizeof(auxdata),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 				       cifsi, cifsi->vfs_inode.i_size, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static void cifs_fscache_enable_inode_cookie(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	struct cifsInodeInfo *cifsi = CIFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	if (cifsi->fscache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	cifs_fscache_acquire_inode_cookie(cifsi, tcon);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	cifs_dbg(FYI, "%s: got FH cookie (0x%p/0x%p)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		 __func__, tcon->fscache, cifsi->fscache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) void cifs_fscache_release_inode_cookie(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	struct cifs_fscache_inode_auxdata auxdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	struct cifsInodeInfo *cifsi = CIFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	if (cifsi->fscache) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		memset(&auxdata, 0, sizeof(auxdata));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		auxdata.eof = cifsi->server_eof;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		fscache_relinquish_cookie(cifsi->fscache, &auxdata, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		cifsi->fscache = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static void cifs_fscache_disable_inode_cookie(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	struct cifsInodeInfo *cifsi = CIFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	if (cifsi->fscache) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		fscache_uncache_all_inode_pages(cifsi->fscache, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		fscache_relinquish_cookie(cifsi->fscache, NULL, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		cifsi->fscache = NULL;
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	if ((filp->f_flags & O_ACCMODE) != O_RDONLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		cifs_fscache_disable_inode_cookie(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		cifs_fscache_enable_inode_cookie(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) void cifs_fscache_reset_inode_cookie(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	struct cifsInodeInfo *cifsi = CIFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	struct fscache_cookie *old = cifsi->fscache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	if (cifsi->fscache) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		/* retire the current fscache cache and get a new one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		fscache_relinquish_cookie(cifsi->fscache, NULL, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		cifs_fscache_acquire_inode_cookie(cifsi, tcon);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		cifs_dbg(FYI, "%s: new cookie 0x%p oldcookie 0x%p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 			 __func__, cifsi->fscache, old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) int cifs_fscache_release_page(struct page *page, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	if (PageFsCache(page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		struct inode *inode = page->mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		struct cifsInodeInfo *cifsi = CIFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 			 __func__, page, cifsi->fscache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		if (!fscache_maybe_release_page(cifsi->fscache, page, gfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 			return 0;
^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) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static void cifs_readpage_from_fscache_complete(struct page *page, void *ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 						int error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	cifs_dbg(FYI, "%s: (0x%p/%d)\n", __func__, page, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	if (!error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		SetPageUptodate(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)  * Retrieve a page from FS-Cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) int __cifs_readpage_from_fscache(struct inode *inode, struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	cifs_dbg(FYI, "%s: (fsc:%p, p:%p, i:0x%p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		 __func__, CIFS_I(inode)->fscache, page, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	ret = fscache_read_or_alloc_page(CIFS_I(inode)->fscache, page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 					 cifs_readpage_from_fscache_complete,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 					 NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 					 GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	switch (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	case 0: /* page found in fscache, read submitted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		cifs_dbg(FYI, "%s: submitted\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	case -ENOBUFS:	/* page won't be cached */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	case -ENODATA:	/* page not in cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		cifs_dbg(FYI, "%s: %d\n", __func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		cifs_dbg(VFS, "unknown error ret = %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)  * Retrieve a set of pages from FS-Cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) int __cifs_readpages_from_fscache(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 				struct address_space *mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 				struct list_head *pages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 				unsigned *nr_pages)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	cifs_dbg(FYI, "%s: (0x%p/%u/0x%p)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		 __func__, CIFS_I(inode)->fscache, *nr_pages, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	ret = fscache_read_or_alloc_pages(CIFS_I(inode)->fscache, mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 					  pages, nr_pages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 					  cifs_readpage_from_fscache_complete,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 					  NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 					  mapping_gfp_mask(mapping));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	switch (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	case 0:	/* read submitted to the cache for all pages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		cifs_dbg(FYI, "%s: submitted\n", __func__);
^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) 	case -ENOBUFS:	/* some pages are not cached and can't be */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	case -ENODATA:	/* some pages are not cached */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		cifs_dbg(FYI, "%s: no page\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		cifs_dbg(FYI, "unknown error ret = %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) void __cifs_readpage_to_fscache(struct inode *inode, struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	struct cifsInodeInfo *cifsi = CIFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	cifs_dbg(FYI, "%s: (fsc: %p, p: %p, i: %p)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		 __func__, cifsi->fscache, page, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	ret = fscache_write_page(cifsi->fscache, page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 				 cifsi->vfs_inode.i_size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	if (ret != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		fscache_uncache_page(cifsi->fscache, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) void __cifs_fscache_readpages_cancel(struct inode *inode, struct list_head *pages)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	cifs_dbg(FYI, "%s: (fsc: %p, i: %p)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		 __func__, CIFS_I(inode)->fscache, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	fscache_readpages_cancel(CIFS_I(inode)->fscache, pages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) void __cifs_fscache_invalidate_page(struct page *page, struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	struct cifsInodeInfo *cifsi = CIFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	struct fscache_cookie *cookie = cifsi->fscache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, page, cookie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	fscache_wait_on_page_write(cookie, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	fscache_uncache_page(cookie, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }