[PATCH 29/37] NFS: Invalidate FsCache page flags when cache removed
Invalidate the FsCache page flags on the pages belonging to an inode when the cache backing that NFS inode is removed. This allows a live cache to be withdrawn. Signed-off-by: David Howells [EMAIL PROTECTED] --- fs/nfs/fscache-index.c | 40 1 files changed, 40 insertions(+), 0 deletions(-) diff --git a/fs/nfs/fscache-index.c b/fs/nfs/fscache-index.c index c3c63fa..eec8e7e 100644 --- a/fs/nfs/fscache-index.c +++ b/fs/nfs/fscache-index.c @@ -246,6 +246,45 @@ static enum fscache_checkaux nfs_cache_inode_check_aux(void *cookie_netfs_data, } /* + * Indication from FS-Cache that the cookie is no longer cached + * - This function is called when the backing store currently caching a cookie + * is removed + * - The netfs should use this to clean up any markers indicating cached pages + * - This is mandatory for any object that may have data + */ +static void nfs_cache_inode_now_uncached(void *cookie_netfs_data) +{ + struct nfs_inode *nfsi = cookie_netfs_data; + struct pagevec pvec; + pgoff_t first; + int loop, nr_pages; + + pagevec_init(pvec, 0); + first = 0; + + dprintk(NFS: nfs_inode_now_uncached: nfs_inode 0x%p\n, nfsi); + + for (;;) { + /* grab a bunch of pages to unmark */ + nr_pages = pagevec_lookup(pvec, + nfsi-vfs_inode.i_mapping, + first, + PAGEVEC_SIZE - pagevec_count(pvec)); + if (!nr_pages) + break; + + for (loop = 0; loop nr_pages; loop++) + ClearPageFsCache(pvec.pages[loop]); + + first = pvec.pages[nr_pages - 1]-index + 1; + + pvec.nr = nr_pages; + pagevec_release(pvec); + cond_resched(); + } +} + +/* * Define the inode object for FS-Cache. This is used to describe an inode * object to fscache_acquire_cookie(). It is keyed by the NFS file handle for * an inode. @@ -261,4 +300,5 @@ const struct fscache_cookie_def nfs_cache_inode_object_def = { .get_attr = nfs_cache_inode_get_attr, .get_aux= nfs_cache_inode_get_aux, .check_aux = nfs_cache_inode_check_aux, + .now_uncached = nfs_cache_inode_now_uncached, }; - To unsubscribe from this list: send the line unsubscribe linux-security-module in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH 29/37] NFS: Invalidate FsCache page flags when cache removed
Invalidate the FsCache page flags on the pages belonging to an inode when the cache backing that NFS inode is removed. This allows a live cache to be withdrawn. Signed-off-by: David Howells [EMAIL PROTECTED] --- fs/nfs/fscache-index.c | 40 1 files changed, 40 insertions(+), 0 deletions(-) diff --git a/fs/nfs/fscache-index.c b/fs/nfs/fscache-index.c index c3c63fa..eec8e7e 100644 --- a/fs/nfs/fscache-index.c +++ b/fs/nfs/fscache-index.c @@ -246,6 +246,45 @@ static enum fscache_checkaux nfs_cache_inode_check_aux(void *cookie_netfs_data, } /* + * Indication from FS-Cache that the cookie is no longer cached + * - This function is called when the backing store currently caching a cookie + * is removed + * - The netfs should use this to clean up any markers indicating cached pages + * - This is mandatory for any object that may have data + */ +static void nfs_cache_inode_now_uncached(void *cookie_netfs_data) +{ + struct nfs_inode *nfsi = cookie_netfs_data; + struct pagevec pvec; + pgoff_t first; + int loop, nr_pages; + + pagevec_init(pvec, 0); + first = 0; + + dprintk(NFS: nfs_inode_now_uncached: nfs_inode 0x%p\n, nfsi); + + for (;;) { + /* grab a bunch of pages to unmark */ + nr_pages = pagevec_lookup(pvec, + nfsi-vfs_inode.i_mapping, + first, + PAGEVEC_SIZE - pagevec_count(pvec)); + if (!nr_pages) + break; + + for (loop = 0; loop nr_pages; loop++) + ClearPageFsCache(pvec.pages[loop]); + + first = pvec.pages[nr_pages - 1]-index + 1; + + pvec.nr = nr_pages; + pagevec_release(pvec); + cond_resched(); + } +} + +/* * Define the inode object for FS-Cache. This is used to describe an inode * object to fscache_acquire_cookie(). It is keyed by the NFS file handle for * an inode. @@ -261,4 +300,5 @@ const struct fscache_cookie_def nfs_cache_inode_object_def = { .get_attr = nfs_cache_inode_get_attr, .get_aux= nfs_cache_inode_get_aux, .check_aux = nfs_cache_inode_check_aux, + .now_uncached = nfs_cache_inode_now_uncached, }; - To unsubscribe from this list: send the line unsubscribe linux-security-module in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html