diff options
Diffstat (limited to 'fs/cifs/fscache.c')
| -rw-r--r-- | fs/cifs/fscache.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c deleted file mode 100644 index efaac4d5ff55..000000000000 --- a/fs/cifs/fscache.c +++ /dev/null @@ -1,170 +0,0 @@ -// SPDX-License-Identifier: LGPL-2.1 -/* - * CIFS filesystem cache interface - * - * Copyright (c) 2010 Novell, Inc. - * Author(s): Suresh Jayaraman <sjayaraman@suse.de> - * - */ -#include "fscache.h" -#include "cifsglob.h" -#include "cifs_debug.h" -#include "cifs_fs_sb.h" -#include "cifsproto.h" - -static void cifs_fscache_fill_volume_coherency( - struct cifs_tcon *tcon, - struct cifs_fscache_volume_coherency_data *cd) -{ - memset(cd, 0, sizeof(*cd)); - cd->resource_id = cpu_to_le64(tcon->resource_id); - cd->vol_create_time = tcon->vol_create_time; - cd->vol_serial_number = cpu_to_le32(tcon->vol_serial_number); -} - -int cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) -{ - struct cifs_fscache_volume_coherency_data cd; - struct TCP_Server_Info *server = tcon->ses->server; - struct fscache_volume *vcookie; - const struct sockaddr *sa = (struct sockaddr *)&server->dstaddr; - size_t slen, i; - char *sharename; - char *key; - int ret = -ENOMEM; - - tcon->fscache = NULL; - switch (sa->sa_family) { - case AF_INET: - case AF_INET6: - break; - default: - cifs_dbg(VFS, "Unknown network family '%d'\n", sa->sa_family); - return -EINVAL; - } - - memset(&key, 0, sizeof(key)); - - sharename = extract_sharename(tcon->treeName); - if (IS_ERR(sharename)) { - cifs_dbg(FYI, "%s: couldn't extract sharename\n", __func__); - return -EINVAL; - } - - slen = strlen(sharename); - for (i = 0; i < slen; i++) - if (sharename[i] == '/') - sharename[i] = ';'; - - key = kasprintf(GFP_KERNEL, "cifs,%pISpc,%s", sa, sharename); - if (!key) - goto out; - - cifs_fscache_fill_volume_coherency(tcon, &cd); - vcookie = fscache_acquire_volume(key, - NULL, /* preferred_cache */ - &cd, sizeof(cd)); - cifs_dbg(FYI, "%s: (%s/0x%p)\n", __func__, key, vcookie); - if (IS_ERR(vcookie)) { - if (vcookie != ERR_PTR(-EBUSY)) { - ret = PTR_ERR(vcookie); - goto out_2; - } - pr_err("Cache volume key already in use (%s)\n", key); - vcookie = NULL; - } - - tcon->fscache = vcookie; - ret = 0; -out_2: - kfree(key); -out: - kfree(sharename); - return ret; -} - -void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) -{ - struct cifs_fscache_volume_coherency_data cd; - - cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache); - - cifs_fscache_fill_volume_coherency(tcon, &cd); - fscache_relinquish_volume(tcon->fscache, &cd, false); - tcon->fscache = NULL; -} - -void cifs_fscache_get_inode_cookie(struct inode *inode) -{ - struct cifs_fscache_inode_coherency_data cd; - struct cifsInodeInfo *cifsi = CIFS_I(inode); - struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); - struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); - - cifs_fscache_fill_coherency(&cifsi->vfs_inode, &cd); - - cifsi->fscache = - fscache_acquire_cookie(tcon->fscache, 0, - &cifsi->uniqueid, sizeof(cifsi->uniqueid), - &cd, sizeof(cd), - i_size_read(&cifsi->vfs_inode)); -} - -void cifs_fscache_unuse_inode_cookie(struct inode *inode, bool update) -{ - if (update) { - struct cifs_fscache_inode_coherency_data cd; - loff_t i_size = i_size_read(inode); - - cifs_fscache_fill_coherency(inode, &cd); - fscache_unuse_cookie(cifs_inode_cookie(inode), &cd, &i_size); - } else { - fscache_unuse_cookie(cifs_inode_cookie(inode), NULL, NULL); - } -} - -void cifs_fscache_release_inode_cookie(struct inode *inode) -{ - struct cifsInodeInfo *cifsi = CIFS_I(inode); - - if (cifsi->fscache) { - cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache); - fscache_relinquish_cookie(cifsi->fscache, false); - cifsi->fscache = NULL; - } -} - -/* - * Retrieve a page from FS-Cache - */ -int __cifs_readpage_from_fscache(struct inode *inode, struct page *page) -{ - cifs_dbg(FYI, "%s: (fsc:%p, p:%p, i:0x%p\n", - __func__, CIFS_I(inode)->fscache, page, inode); - return -ENOBUFS; // Needs conversion to using netfslib -} - -/* - * Retrieve a set of pages from FS-Cache - */ -int __cifs_readpages_from_fscache(struct inode *inode, - struct address_space *mapping, - struct list_head *pages, - unsigned *nr_pages) -{ - cifs_dbg(FYI, "%s: (0x%p/%u/0x%p)\n", - __func__, CIFS_I(inode)->fscache, *nr_pages, inode); - return -ENOBUFS; // Needs conversion to using netfslib -} - -void __cifs_readpage_to_fscache(struct inode *inode, struct page *page) -{ - struct cifsInodeInfo *cifsi = CIFS_I(inode); - - WARN_ON(!cifsi->fscache); - - cifs_dbg(FYI, "%s: (fsc: %p, p: %p, i: %p)\n", - __func__, cifsi->fscache, page, inode); - - // Needs conversion to using netfslib -} |