cregit-Linux how code gets into the kernel

Release 4.11 fs/cifs/fscache.c

Directory: fs/cifs
/*
 *   fs/cifs/fscache.c - CIFS filesystem cache interface
 *
 *   Copyright (c) 2010 Novell, Inc.
 *   Author(s): Suresh Jayaraman <sjayaraman@suse.de>
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#include "fscache.h"
#include "cifsglob.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"


void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) { server->fscache = fscache_acquire_cookie(cifs_fscache_netfs.primary_index, &cifs_fscache_server_index_def, server, true); cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, server, server->fscache); }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman3683.72%125.00%
Joe Perches36.98%125.00%
David Howells24.65%125.00%
Steve French24.65%125.00%
Total43100.00%4100.00%


void cifs_fscache_release_client_cookie(struct TCP_Server_Info *server) { cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, server, server->fscache); fscache_relinquish_cookie(server->fscache, 0); server->fscache = NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman3587.50%133.33%
Joe Perches37.50%133.33%
Steve French25.00%133.33%
Total40100.00%3100.00%


void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) { struct TCP_Server_Info *server = tcon->ses->server; tcon->fscache = fscache_acquire_cookie(server->fscache, &cifs_fscache_super_index_def, tcon, true); cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, server->fscache, tcon->fscache); }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman4885.71%120.00%
Steve French35.36%240.00%
Joe Perches35.36%120.00%
David Howells23.57%120.00%
Total56100.00%5100.00%


void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) { cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache); fscache_relinquish_cookie(tcon->fscache, 0); tcon->fscache = NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman3284.21%125.00%
Joe Perches37.89%125.00%
Steve French37.89%250.00%
Total38100.00%4100.00%


static void cifs_fscache_enable_inode_cookie(struct inode *inode) { 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); if (cifsi->fscache) return; if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) { cifsi->fscache = fscache_acquire_cookie(tcon->fscache, &cifs_fscache_inode_object_def, cifsi, true); cifs_dbg(FYI, "%s: got FH cookie (0x%p/0x%p)\n", __func__, tcon->fscache, cifsi->fscache); } }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman7680.00%228.57%
Jeff Layton1111.58%114.29%
Steve French33.16%228.57%
Joe Perches33.16%114.29%
David Howells22.11%114.29%
Total95100.00%7100.00%


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, 0); cifsi->fscache = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman5191.07%133.33%
Joe Perches35.36%133.33%
Steve French23.57%133.33%
Total56100.00%3100.00%


static void cifs_fscache_disable_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_uncache_all_inode_pages(cifsi->fscache, inode); fscache_relinquish_cookie(cifsi->fscache, 1); cifsi->fscache = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman5278.79%125.00%
David Howells913.64%125.00%
Joe Perches34.55%125.00%
Steve French23.03%125.00%
Total66100.00%4100.00%


void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp) { if ((filp->f_flags & O_ACCMODE) != O_RDONLY) cifs_fscache_disable_inode_cookie(inode); else cifs_fscache_enable_inode_cookie(inode); }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman38100.00%1100.00%
Total38100.00%1100.00%


void cifs_fscache_reset_inode_cookie(struct inode *inode) { struct cifsInodeInfo *cifsi = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct fscache_cookie *old = cifsi->fscache; if (cifsi->fscache) { /* retire the current fscache cache and get a new one */ fscache_relinquish_cookie(cifsi->fscache, 1); cifsi->fscache = fscache_acquire_cookie( cifs_sb_master_tcon(cifs_sb)->fscache, &cifs_fscache_inode_object_def, cifsi, true); cifs_dbg(FYI, "%s: new cookie 0x%p oldcookie 0x%p\n", __func__, cifsi->fscache, old); } }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman8589.47%116.67%
Joe Perches33.16%116.67%
Jeff Layton33.16%233.33%
David Howells22.11%116.67%
Steve French22.11%116.67%
Total95100.00%6100.00%


int cifs_fscache_release_page(struct page *page, gfp_t gfp) { if (PageFsCache(page)) { struct inode *inode = page->mapping->host; struct cifsInodeInfo *cifsi = CIFS_I(inode); cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, page, cifsi->fscache); if (!fscache_maybe_release_page(cifsi->fscache, page, gfp)) return 0; } return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman7393.59%133.33%
Joe Perches33.85%133.33%
Steve French22.56%133.33%
Total78100.00%3100.00%


static void cifs_readpage_from_fscache_complete(struct page *page, void *ctx, int error) { cifs_dbg(FYI, "%s: (0x%p/%d)\n", __func__, page, error); if (!error) SetPageUptodate(page); unlock_page(page); }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman4189.13%133.33%
Joe Perches36.52%133.33%
Steve French24.35%133.33%
Total46100.00%3100.00%

/* * Retrieve a page from FS-Cache */
int __cifs_readpage_from_fscache(struct inode *inode, struct page *page) { int ret; cifs_dbg(FYI, "%s: (fsc:%p, p:%p, i:0x%p\n", __func__, CIFS_I(inode)->fscache, page, inode); ret = fscache_read_or_alloc_page(CIFS_I(inode)->fscache, page, cifs_readpage_from_fscache_complete, NULL, GFP_KERNEL); switch (ret) { case 0: /* page found in fscache, read submitted */ cifs_dbg(FYI, "%s: submitted\n", __func__); return ret; case -ENOBUFS: /* page won't be cached */ case -ENODATA: /* page not in cache */ cifs_dbg(FYI, "%s: %d\n", __func__, ret); return 1; default: cifs_dbg(VFS, "unknown error ret = %d\n", ret); } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman9984.62%133.33%
Joe Perches1210.26%133.33%
Steve French65.13%133.33%
Total117100.00%3100.00%

/* * 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) { int ret; cifs_dbg(FYI, "%s: (0x%p/%u/0x%p)\n", __func__, CIFS_I(inode)->fscache, *nr_pages, inode); ret = fscache_read_or_alloc_pages(CIFS_I(inode)->fscache, mapping, pages, nr_pages, cifs_readpage_from_fscache_complete, NULL, mapping_gfp_mask(mapping)); switch (ret) { case 0: /* read submitted to the cache for all pages */ cifs_dbg(FYI, "%s: submitted\n", __func__); return ret; case -ENOBUFS: /* some pages are not cached and can't be */ case -ENODATA: /* some pages are not cached */ cifs_dbg(FYI, "%s: no page\n", __func__); return 1; default: cifs_dbg(FYI, "unknown error ret = %d\n", ret); } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman11486.36%133.33%
Joe Perches129.09%133.33%
Steve French64.55%133.33%
Total132100.00%3100.00%


void __cifs_readpage_to_fscache(struct inode *inode, struct page *page) { int ret; cifs_dbg(FYI, "%s: (fsc: %p, p: %p, i: %p)\n", __func__, CIFS_I(inode)->fscache, page, inode); ret = fscache_write_page(CIFS_I(inode)->fscache, page, GFP_KERNEL); if (ret != 0) fscache_uncache_page(CIFS_I(inode)->fscache, page); }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman6793.06%133.33%
Joe Perches34.17%133.33%
Steve French22.78%133.33%
Total72100.00%3100.00%


void __cifs_fscache_readpages_cancel(struct inode *inode, struct list_head *pages) { cifs_dbg(FYI, "%s: (fsc: %p, i: %p)\n", __func__, CIFS_I(inode)->fscache, inode); fscache_readpages_cancel(CIFS_I(inode)->fscache, pages); }

Contributors

PersonTokensPropCommitsCommitProp
David Howells45100.00%1100.00%
Total45100.00%1100.00%


void __cifs_fscache_invalidate_page(struct page *page, struct inode *inode) { struct cifsInodeInfo *cifsi = CIFS_I(inode); struct fscache_cookie *cookie = cifsi->fscache; cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, page, cookie); fscache_wait_on_page_write(cookie, page); fscache_uncache_page(cookie, page); }

Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman5691.80%133.33%
Joe Perches34.92%133.33%
Steve French23.28%133.33%
Total61100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Suresh Jayaraman91883.99%746.67%
David Howells625.67%320.00%
Joe Perches605.49%16.67%
Steve French393.57%213.33%
Jeff Layton141.28%213.33%
Total1093100.00%15100.00%
Directory: fs/cifs
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