diff options
Diffstat (limited to 'fs')
-rw-r--r-- | fs/9p/cache.c | 73 | ||||
-rw-r--r-- | fs/afs/cache.c | 120 | ||||
-rw-r--r-- | fs/afs/cell.c | 4 | ||||
-rw-r--r-- | fs/afs/inode.c | 46 | ||||
-rw-r--r-- | fs/afs/internal.h | 7 | ||||
-rw-r--r-- | fs/afs/volume.c | 4 | ||||
-rw-r--r-- | fs/cachefiles/interface.c | 38 | ||||
-rw-r--r-- | fs/cachefiles/namei.c | 33 | ||||
-rw-r--r-- | fs/cachefiles/xattr.c | 2 | ||||
-rw-r--r-- | fs/ceph/cache.c | 93 | ||||
-rw-r--r-- | fs/cifs/cache.c | 153 | ||||
-rw-r--r-- | fs/cifs/fscache.c | 122 | ||||
-rw-r--r-- | fs/cifs/fscache.h | 13 | ||||
-rw-r--r-- | fs/fscache/cache.c | 2 | ||||
-rw-r--r-- | fs/fscache/cookie.c | 88 | ||||
-rw-r--r-- | fs/fscache/fsdef.c | 49 | ||||
-rw-r--r-- | fs/fscache/internal.h | 21 | ||||
-rw-r--r-- | fs/fscache/netfs.c | 17 | ||||
-rw-r--r-- | fs/fscache/object-list.c | 28 | ||||
-rw-r--r-- | fs/fscache/object.c | 22 | ||||
-rw-r--r-- | fs/fscache/operation.c | 2 | ||||
-rw-r--r-- | fs/nfs/fscache-index.c | 140 | ||||
-rw-r--r-- | fs/nfs/fscache.c | 83 | ||||
-rw-r--r-- | fs/nfs/fscache.h | 16 |
24 files changed, 490 insertions, 686 deletions
diff --git a/fs/9p/cache.c b/fs/9p/cache.c index 64c58eb2..9d0030a 100644 --- a/fs/9p/cache.c +++ b/fs/9p/cache.c @@ -55,41 +55,26 @@ int v9fs_random_cachetag(struct v9fs_session_info *v9ses) return scnprintf(v9ses->cachetag, CACHETAG_LEN, "%lu", jiffies); } -static uint16_t v9fs_cache_session_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - struct v9fs_session_info *v9ses; - uint16_t klen = 0; - - v9ses = (struct v9fs_session_info *)cookie_netfs_data; - p9_debug(P9_DEBUG_FSC, "session %p buf %p size %u\n", - v9ses, buffer, bufmax); - - if (v9ses->cachetag) - klen = strlen(v9ses->cachetag); - - if (klen > bufmax) - return 0; - - memcpy(buffer, v9ses->cachetag, klen); - p9_debug(P9_DEBUG_FSC, "cache session tag %s\n", v9ses->cachetag); - return klen; -} - const struct fscache_cookie_def v9fs_cache_session_index_def = { .name = "9P.session", .type = FSCACHE_COOKIE_TYPE_INDEX, - .get_key = v9fs_cache_session_get_key, }; void v9fs_cache_session_get_cookie(struct v9fs_session_info *v9ses) { /* If no cache session tag was specified, we generate a random one. */ - if (!v9ses->cachetag) - v9fs_random_cachetag(v9ses); + if (!v9ses->cachetag) { + if (v9fs_random_cachetag(v9ses) < 0) { + v9ses->fscache = NULL; + return; + } + } v9ses->fscache = fscache_acquire_cookie(v9fs_cache_netfs.primary_index, &v9fs_cache_session_index_def, + v9ses->cachetag, + strlen(v9ses->cachetag), + NULL, 0, v9ses, true); p9_debug(P9_DEBUG_FSC, "session %p get cookie %p\n", v9ses, v9ses->fscache); @@ -99,21 +84,10 @@ void v9fs_cache_session_put_cookie(struct v9fs_session_info *v9ses) { p9_debug(P9_DEBUG_FSC, "session %p put cookie %p\n", v9ses, v9ses->fscache); - fscache_relinquish_cookie(v9ses->fscache, 0); + fscache_relinquish_cookie(v9ses->fscache, NULL, false); v9ses->fscache = NULL; } - -static uint16_t v9fs_cache_inode_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - const struct v9fs_inode *v9inode = cookie_netfs_data; - memcpy(buffer, &v9inode->qid.path, sizeof(v9inode->qid.path)); - p9_debug(P9_DEBUG_FSC, "inode %p get key %llu\n", - &v9inode->vfs_inode, v9inode->qid.path); - return sizeof(v9inode->qid.path); -} - static void v9fs_cache_inode_get_attr(const void *cookie_netfs_data, uint64_t *size) { @@ -124,16 +98,6 @@ static void v9fs_cache_inode_get_attr(const void *cookie_netfs_data, &v9inode->vfs_inode, *size); } -static uint16_t v9fs_cache_inode_get_aux(const void *cookie_netfs_data, - void *buffer, uint16_t buflen) -{ - const struct v9fs_inode *v9inode = cookie_netfs_data; - memcpy(buffer, &v9inode->qid.version, sizeof(v9inode->qid.version)); - p9_debug(P9_DEBUG_FSC, "inode %p get aux %u\n", - &v9inode->vfs_inode, v9inode->qid.version); - return sizeof(v9inode->qid.version); -} - static enum fscache_checkaux v9fs_cache_inode_check_aux(void *cookie_netfs_data, const void *buffer, @@ -154,9 +118,7 @@ fscache_checkaux v9fs_cache_inode_check_aux(void *cookie_netfs_data, const struct fscache_cookie_def v9fs_cache_inode_index_def = { .name = "9p.inode", .type = FSCACHE_COOKIE_TYPE_DATAFILE, - .get_key = v9fs_cache_inode_get_key, .get_attr = v9fs_cache_inode_get_attr, - .get_aux = v9fs_cache_inode_get_aux, .check_aux = v9fs_cache_inode_check_aux, }; @@ -175,6 +137,10 @@ void v9fs_cache_inode_get_cookie(struct inode *inode) v9ses = v9fs_inode2v9ses(inode); v9inode->fscache = fscache_acquire_cookie(v9ses->fscache, &v9fs_cache_inode_index_def, + &v9inode->qid.path, + sizeof(v9inode->qid.path), + &v9inode->qid.version, + sizeof(v9inode->qid.version), v9inode, true); p9_debug(P9_DEBUG_FSC, "inode %p get cookie %p\n", @@ -190,7 +156,8 @@ void v9fs_cache_inode_put_cookie(struct inode *inode) p9_debug(P9_DEBUG_FSC, "inode %p put cookie %p\n", inode, v9inode->fscache); - fscache_relinquish_cookie(v9inode->fscache, 0); + fscache_relinquish_cookie(v9inode->fscache, &v9inode->qid.version, + false); v9inode->fscache = NULL; } @@ -203,7 +170,7 @@ void v9fs_cache_inode_flush_cookie(struct inode *inode) p9_debug(P9_DEBUG_FSC, "inode %p flush cookie %p\n", inode, v9inode->fscache); - fscache_relinquish_cookie(v9inode->fscache, 1); + fscache_relinquish_cookie(v9inode->fscache, NULL, true); v9inode->fscache = NULL; } @@ -236,11 +203,15 @@ void v9fs_cache_inode_reset_cookie(struct inode *inode) old = v9inode->fscache; mutex_lock(&v9inode->fscache_lock); - fscache_relinquish_cookie(v9inode->fscache, 1); + fscache_relinquish_cookie(v9inode->fscache, NULL, true); v9ses = v9fs_inode2v9ses(inode); v9inode->fscache = fscache_acquire_cookie(v9ses->fscache, &v9fs_cache_inode_index_def, + &v9inode->qid.path, + sizeof(v9inode->qid.path), + &v9inode->qid.version, + sizeof(v9inode->qid.version), v9inode, true); p9_debug(P9_DEBUG_FSC, "inode %p revalidating cookie old %p new %p\n", inode, old, v9inode->fscache); diff --git a/fs/afs/cache.c b/fs/afs/cache.c index cd857db..a16f1e0 100644 --- a/fs/afs/cache.c +++ b/fs/afs/cache.c @@ -12,17 +12,8 @@ #include <linux/sched.h> #include "internal.h" -static uint16_t afs_cell_cache_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t buflen); -static uint16_t afs_volume_cache_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t buflen); - -static uint16_t afs_vnode_cache_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t buflen); static void afs_vnode_cache_get_attr(const void *cookie_netfs_data, uint64_t *size); -static uint16_t afs_vnode_cache_get_aux(const void *cookie_netfs_data, - void *buffer, uint16_t buflen); static enum fscache_checkaux afs_vnode_cache_check_aux(void *cookie_netfs_data, const void *buffer, uint16_t buflen); @@ -35,98 +26,21 @@ struct fscache_netfs afs_cache_netfs = { struct fscache_cookie_def afs_cell_cache_index_def = { .name = "AFS.cell", .type = FSCACHE_COOKIE_TYPE_INDEX, - .get_key = afs_cell_cache_get_key, }; struct fscache_cookie_def afs_volume_cache_index_def = { .name = "AFS.volume", .type = FSCACHE_COOKIE_TYPE_INDEX, - .get_key = afs_volume_cache_get_key, }; struct fscache_cookie_def afs_vnode_cache_index_def = { - .name = "AFS.vnode", - .type = FSCACHE_COOKIE_TYPE_DATAFILE, - .get_key = afs_vnode_cache_get_key, - .get_attr = afs_vnode_cache_get_attr, - .get_aux = afs_vnode_cache_get_aux, - .check_aux = afs_vnode_cache_check_aux, + .name = "AFS.vnode", + .type = FSCACHE_COOKIE_TYPE_DATAFILE, + .get_attr = afs_vnode_cache_get_attr, + .check_aux = afs_vnode_cache_check_aux, }; /* - * set the key for the index entry - */ -static uint16_t afs_cell_cache_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - const struct afs_cell *cell = cookie_netfs_data; - uint16_t klen; - - _enter("%p,%p,%u", cell, buffer, bufmax); - - klen = strlen(cell->name); - if (klen > bufmax) - return 0; - - memcpy(buffer, cell->name, klen); - return klen; -} - -/*****************************************************************************/ -/* - * set the key for the volume index entry - */ -static uint16_t afs_volume_cache_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - const struct afs_volume *volume = cookie_netfs_data; - struct { - u64 volid; - } __packed key; - - _enter("{%u},%p,%u", volume->type, buffer, bufmax); - - if (bufmax < sizeof(key)) - return 0; - - key.volid = volume->vid; - memcpy(buffer, &key, sizeof(key)); - return sizeof(key); -} - -/*****************************************************************************/ -/* - * set the key for the index entry - */ -static uint16_t afs_vnode_cache_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - const struct afs_vnode *vnode = cookie_netfs_data; - struct { - u32 vnode_id; - u32 unique; - u32 vnode_id_ext[2]; /* Allow for a 96-bit key */ - } __packed key; - - _enter("{%x,%x,%llx},%p,%u", - vnode->fid.vnode, vnode->fid.unique, vnode->status.data_version, - buffer, bufmax); - - /* Allow for a 96-bit key */ - memset(&key, 0, sizeof(key)); - key.vnode_id = vnode->fid.vnode; - key.unique = vnode->fid.unique; - key.vnode_id_ext[0] = 0; - key.vnode_id_ext[1] = 0; - - if (sizeof(key) > bufmax) - return 0; - - memcpy(buffer, &key, sizeof(key)); - return sizeof(key); -} - -/* * provide updated file attributes */ static void afs_vnode_cache_get_attr(const void *cookie_netfs_data, @@ -141,32 +55,6 @@ static void afs_vnode_cache_get_attr(const void *cookie_netfs_data, *size = vnode->status.size; } -struct afs_vnode_cache_aux { - u64 data_version; -} __packed; - -/* - * provide new auxiliary cache data - */ -static uint16_t afs_vnode_cache_get_aux(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - const struct afs_vnode *vnode = cookie_netfs_data; - struct afs_vnode_cache_aux aux; - - _enter("{%x,%x,%Lx},%p,%u", - vnode->fid.vnode, vnode->fid.unique, vnode->status.data_version, - buffer, bufmax); - - aux.data_version = vnode->status.data_version; - - if (bufmax < sizeof(aux)) - return 0; - - memcpy(buffer, &aux, sizeof(aux)); - return sizeof(aux); -} - /* * check that the auxiliary data indicates that the entry is still valid */ diff --git a/fs/afs/cell.c b/fs/afs/cell.c index 3d2c5e0..0747460 100644 --- a/fs/afs/cell.c +++ b/fs/afs/cell.c @@ -522,6 +522,8 @@ static int afs_activate_cell(struct afs_net *net, struct afs_cell *cell) #ifdef CONFIG_AFS_FSCACHE cell->cache = fscache_acquire_cookie(afs_cache_netfs.primary_index, &afs_cell_cache_index_def, + cell->name, strlen(cell->name), + NULL, 0, cell, true); #endif ret = afs_proc_cell_setup(net, cell); @@ -547,7 +549,7 @@ static void afs_deactivate_cell(struct afs_net *net, struct afs_cell *cell) spin_unlock(&net->proc_cells_lock); #ifdef CONFIG_AFS_FSCACHE - fscache_relinquish_cookie(cell->cache, 0); + fscache_relinquish_cookie(cell->cache, NULL, false); cell->cache = NULL; #endif diff --git a/fs/afs/inode.c b/fs/afs/inode.c index c942c79..e499713 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -243,6 +243,33 @@ struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root) } /* + * Get a cache cookie for an inode. + */ +static void afs_get_inode_cache(struct afs_vnode *vnode) +{ +#ifdef CONFIG_AFS_FSCACHE + struct { + u32 vnode_id; + u32 unique; + u32 vnode_id_ext[2]; /* Allow for a 96-bit key */ + } __packed key; + struct afs_vnode_cache_aux aux; + + key.vnode_id = vnode->fid.vnode; + key.unique = vnode->fid.unique; + key.vnode_id_ext[0] = 0; + key.vnode_id_ext[1] = 0; + aux.data_version = vnode->status.data_version; + + vnode->cache = fscache_acquire_cookie(vnode->volume->cache, + &afs_vnode_cache_index_def, + &key, sizeof(key), + &aux, sizeof(aux), + vnode, true); +#endif +} + +/* * inode retrieval */ struct inode *afs_iget(struct super_block *sb, struct key *key, @@ -307,11 +334,7 @@ struct inode *afs_iget(struct super_block *sb, struct key *key, /* set up caching before mapping the status, as map-status reads the * first page of symlinks to see if they're really mountpoints */ inode->i_size = vnode->status.size; -#ifdef CONFIG_AFS_FSCACHE - vnode->cache = fscache_acquire_cookie(vnode->volume->cache, - &afs_vnode_cache_index_def, - vnode, true); -#endif + afs_get_inode_cache(vnode); ret = afs_inode_map_status(vnode, key); if (ret < 0) @@ -327,7 +350,7 @@ struct inode *afs_iget(struct super_block *sb, struct key *key, /* failure */ bad_inode: #ifdef CONFIG_AFS_FSCACHE - fscache_relinquish_cookie(vnode->cache, ret == -ENOENT); + fscache_relinquish_cookie(vnode->cache, NULL, ret == -ENOENT); vnode->cache = NULL; #endif iget_failed(inode); @@ -511,9 +534,14 @@ void afs_evict_inode(struct inode *inode) } #ifdef CONFIG_AFS_FSCACHE - fscache_relinquish_cookie(vnode->cache, - test_bit(AFS_VNODE_DELETED, &vnode->flags)); - vnode->cache = NULL; + { + struct afs_vnode_cache_aux aux; + + aux.data_version = vnode->status.data_version; + fscache_relinquish_cookie(vnode->cache, &aux, + test_bit(AFS_VNODE_DELETED, &vnode->flags)); + vnode->cache = NULL; + } #endif afs_put_permits(vnode->permit_cache); diff --git a/fs/afs/internal.h b/fs/afs/internal.h index 7221717..a6a1d75 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -559,6 +559,13 @@ struct afs_fs_cursor { #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ }; +/* + * Cache auxiliary data. + */ +struct afs_vnode_cache_aux { + u64 data_version; +} __packed; + #include <trace/events/afs.h> /*****************************************************************************/ diff --git a/fs/afs/volume.c b/fs/afs/volume.c index b517a58..345cb2d 100644 --- a/fs/afs/volume.c +++ b/fs/afs/volume.c @@ -225,6 +225,8 @@ void afs_activate_volume(struct afs_volume *volume) #ifdef CONFIG_AFS_FSCACHE volume->cache = fscache_acquire_cookie(volume->cell->cache, &afs_volume_cache_index_def, + &volume->vid, sizeof(volume->vid), + NULL, 0, volume, true); #endif @@ -245,7 +247,7 @@ void afs_deactivate_volume(struct afs_volume *volume) write_unlock(&volume->cell->proc_lock); #ifdef CONFIG_AFS_FSCACHE - fscache_relinquish_cookie(volume->cache, + fscache_relinquish_cookie(volume->cache, NULL, test_bit(AFS_VOLUME_DELETED, &volume->flags)); volume->cache = NULL; #endif diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c index 405ebc3..3264dcf 100644 --- a/fs/cachefiles/interface.c +++ b/fs/cachefiles/interface.c @@ -32,7 +32,7 @@ static struct fscache_object *cachefiles_alloc_object( struct cachefiles_cache *cache; struct cachefiles_xattr *auxdata; unsigned keylen, auxlen; - void *buffer; + void *buffer, *p; char *key; cache = container_of(_cache, struct cachefiles_cache, cache); @@ -65,8 +65,12 @@ static struct fscache_object *cachefiles_alloc_object( if (!buffer) goto nomem_buffer; - keylen = cookie->def->get_key(cookie->netfs_data, buffer + 2, 512); - ASSERTCMP(keylen, <, 512); + keylen = cookie->key_len; + if (keylen <= sizeof(cookie->inline_key)) + p = cookie->inline_key; + else + p = cookie->key; + memcpy(buffer + 2, p, keylen); *(uint16_t *)buffer = keylen; ((char *)buffer)[keylen + 2] = 0; @@ -80,15 +84,17 @@ static struct fscache_object *cachefiles_alloc_object( /* get hold of the auxiliary data and prepend the object type */ auxdata = buffer; - auxlen = 0; - if (cookie->def->get_aux) { - auxlen = cookie->def->get_aux(cookie->netfs_data, - auxdata->data, 511); - ASSERTCMP(auxlen, <, 511); + auxlen = cookie->aux_len; + if (auxlen) { + if (auxlen <= sizeof(cookie->inline_aux)) + p = cookie->inline_aux; + else + p = cookie->aux; + memcpy(auxdata->data, p, auxlen); } auxdata->len = auxlen + 1; - auxdata->type = cookie->def->type; + auxdata->type = cookie->type; lookup_data->auxdata = auxdata; lookup_data->key = key; @@ -206,6 +212,7 @@ static void cachefiles_update_object(struct fscache_object *_object) struct cachefiles_cache *cache; struct fscache_cookie *cookie; const struct cred *saved_cred; + const void *aux; unsigned auxlen; _enter("{OBJ%x}", _object->debug_id); @@ -220,26 +227,29 @@ static void cachefiles_update_object(struct fscache_object *_object) } cookie = object->fscache.cookie; + auxlen = cookie->aux_len; - if (!cookie->def->get_aux) { + if (!auxlen) { fscache_unuse_cookie(_object); _leave(" [no aux]"); return; } - auxdata = kmalloc(2 + 512 + 3, cachefiles_gfp); + auxdata = kmalloc(2 + auxlen + 3, cachefiles_gfp); if (!auxdata) { fscache_unuse_cookie(_object); _leave(" [nomem]"); return; } - auxlen = cookie->def->get_aux(cookie->netfs_data, auxdata->data, 511); + aux = (auxlen <= sizeof(cookie->inline_aux)) ? + cookie->inline_aux : cookie->aux; + + memcpy(auxdata->data, aux, auxlen); fscache_unuse_cookie(_object); - ASSERTCMP(auxlen, <, 511); auxdata->len = auxlen + 1; - auxdata->type = cookie->def->type; + auxdata->type = cookie->type; cachefiles_begin_secure(cache, &saved_cred); cachefiles_update_object_xattr(object, auxdata); diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c index 5fc2142..0daa1e3 100644 --- a/fs/cachefiles/namei.c +++ b/fs/cachefiles/namei.c @@ -30,11 +30,11 @@ */ static noinline void __cachefiles_printk_object(struct cachefiles_object *object, - const char *prefix, - u8 *keybuf) + const char *prefix) { struct fscache_cookie *cookie; - unsigned keylen, loop; + const u8 *k; + unsigned loop; pr_err("%sobject: OBJ%x\n", prefix, object->fscache.debug_id); pr_err("%sobjstate=%s fl=%lx wbusy=%x ev=%lx[%lx]\n", @@ -56,23 +56,16 @@ void __cachefiles_printk_object(struct cachefiles_object *object, object->fscache.cookie->parent, object->fscache.cookie->netfs_data, object->fscache.cookie->flags); - if (keybuf && cookie->def) - keylen = cookie->def->get_key(cookie->netfs_data, keybuf, - CACHEFILES_KEYBUF_SIZE); - else - keylen = 0; + pr_err("%skey=[%u] '", prefix, cookie->key_len); + k = (cookie->key_len <= sizeof(cookie->inline_key)) ? + cookie->inline_key : cookie->key; + for (loop = 0; loop < cookie->key_len; loop++) + pr_cont("%02x", k[loop]); + pr_cont("'\n"); } else { pr_err("%scookie=NULL\n", prefix); - keylen = 0; } spin_unlock(&object->fscache.lock); - - if (keylen) { - pr_err("%skey=[%u] '", prefix, keylen); - for (loop = 0; loop < keylen; loop++) - pr_cont("%02x", keybuf[loop]); - pr_cont("'\n"); - } } /* @@ -81,14 +74,10 @@ void __cachefiles_printk_object(struct cachefiles_object *object, static noinline void cachefiles_printk_object(struct cachefiles_object *object, struct cachefiles_object *xobject) { - u8 *keybuf; - - keybuf = kmalloc(CACHEFILES_KEYBUF_SIZE, GFP_NOIO); if (object) - __cachefiles_printk_object(object, "", keybuf); + __cachefiles_printk_object(object, ""); if (xobject) - __cachefiles_printk_object(xobject, "x", keybuf); - kfree(keybuf); + __cachefiles_printk_object(xobject, "x"); } /* diff --git a/fs/cachefiles/xattr.c b/fs/cachefiles/xattr.c index d31c1a72..d84423c 100644 --- a/fs/cachefiles/xattr.c +++ b/fs/cachefiles/xattr.c @@ -113,6 +113,7 @@ int cachefiles_set_object_xattr(struct cachefiles_object *object, /* attempt to install the cache metadata directly */ _debug("SET #%u", auxdata->len); + clear_bit(FSCACHE_COOKIE_AUX_UPDATED, &object->fscache.cookie->flags); ret = vfs_setxattr(dentry, cachefiles_xattr_cache, &auxdata->type, auxdata->len, XATTR_CREATE); @@ -141,6 +142,7 @@ int cachefiles_update_object_xattr(struct cachefiles_object *object, /* attempt to install the cache metadata directly */ _debug("SET #%u", auxdata->len); + clear_bit(FSCACHE_COOKIE_AUX_UPDATED, &object->fscache.cookie->flags); ret = vfs_setxattr(dentry, cachefiles_xattr_cache, &auxdata->type, auxdata->len, XATTR_REPLACE); diff --git a/fs/ceph/cache.c b/fs/ceph/cache.c index a3ab265..fee8690 100644 --- a/fs/ceph/cache.c +++ b/fs/ceph/cache.c @@ -41,34 +41,15 @@ static LIST_HEAD(ceph_fscache_list); struct ceph_fscache_entry { struct list_head list; struct fscache_cookie *fscache; - struct ceph_fsid fsid; size_t uniq_len; + /* The following members must be last */ + struct ceph_fsid fsid; char uniquifier[0]; }; -static uint16_t ceph_fscache_session_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t maxbuf) -{ - const struct ceph_fs_client* fsc = cookie_netfs_data; - const char *fscache_uniq = fsc->mount_options->fscache_uniq; - uint16_t fsid_len, uniq_len; - - fsid_len = sizeof(fsc->client->fsid); - uniq_len = fscache_uniq ? strlen(fscache_uniq) : 0; - if (fsid_len + uniq_len > maxbuf) - return 0; - - memcpy(buffer, &fsc->client->fsid, fsid_len); - if (uniq_len) - memcpy(buffer + fsid_len, fscache_uniq, uniq_len); - - return fsid_len + uniq_len; -} - static const struct fscache_cookie_def ceph_fscache_fsid_object_def = { .name = "CEPH.fsid", .type = FSCACHE_COOKIE_TYPE_INDEX, - .get_key = ceph_fscache_session_get_key, }; int ceph_fscache_register(void) @@ -110,16 +91,19 @@ int ceph_fscache_register_fs(struct ceph_fs_client* fsc) goto out_unlock; } + memcpy(&ent->fsid, fsid, sizeof(*fsid)); + if (uniq_len > 0) { + memcpy(&ent->uniquifier, fscache_uniq, uniq_len); + ent->uniq_len = uniq_len; + } + fsc->fscache = fscache_acquire_cookie(ceph_cache_netfs.primary_index, &ceph_fscache_fsid_object_def, + &ent->fsid, sizeof(ent->fsid) + uniq_len, + NULL, 0, fsc, true); if (fsc->fscache) { - memcpy(&ent->fsid, fsid, sizeof(*fsid)); - if (uniq_len > 0) { - memcpy(&ent->uniquifier, fscache_uniq, uniq_len); - ent->uniq_len = uniq_len; - } ent->fscache = fsc->fscache; list_add_tail(&ent->list, &ceph_fscache_list); } else { @@ -133,38 +117,6 @@ out_unlock: return err; } -static uint16_t ceph_fscache_inode_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t maxbuf) -{ - const struct ceph_inode_info* ci = cookie_netfs_data; - uint16_t klen; - - /* use ceph virtual inode (id + snapshot) */ - klen = sizeof(ci->i_vino); - if (klen > maxbuf) - return 0; - - memcpy(buffer, &ci->i_vino, klen); - return klen; -} - -static uint16_t ceph_fscache_inode_get_aux(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - struct ceph_aux_inode aux; - const struct ceph_inode_info* ci = cookie_netfs_data; - const struct inode* inode = &ci->vfs_inode; - - memset(&aux, 0, sizeof(aux)); - aux.version = ci->i_version; - aux.mtime = inode->i_mtime; - aux.size = i_size_read(inode); - - memcpy(buffer, &aux, sizeof(aux)); - - return sizeof(aux); -} - static void ceph_fscache_inode_get_attr(const void *cookie_netfs_data, uint64_t *size) { @@ -197,9 +149,7 @@ static enum fscache_checkaux ceph_fscache_inode_check_aux( static const struct fscache_cookie_def ceph_fscache_inode_object_def = { .name = "CEPH.inode", .type = FSCACHE_COOKIE_TYPE_DATAFILE, - .get_key = ceph_fscache_inode_get_key, .get_attr = ceph_fscache_inode_get_attr, - .get_aux = ceph_fscache_inode_get_aux, .check_aux = ceph_fscache_inode_check_aux, }; @@ -207,6 +157,7 @@ void ceph_fscache_register_inode_cookie(struct inode *inode) { struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_client(inode); + struct ceph_aux_inode aux; /* No caching for filesystem */ if (!fsc->fscache) @@ -218,9 +169,15 @@ void ceph_fscache_register_inode_cookie(struct inode *inode) inode_lock_nested(inode, I_MUTEX_CHILD); if (!ci->fscache) { + memset(&aux, 0, sizeof(aux)); + aux.version = ci->i_version; + aux.mtime = inode->i_mtime; + aux.size = i_size_read(inode); ci->fscache = fscache_acquire_cookie(fsc->fscache, - &ceph_fscache_inode_object_def, - ci, false); + &ceph_fscache_inode_object_def, + &ci->i_vino, sizeof(ci->i_vino), + &aux, sizeof(aux), + ci, false); } inode_unlock(inode); } @@ -235,7 +192,7 @@ void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) ci->fscache = NULL; fscache_uncache_all_inode_pages(cookie, &ci->vfs_inode); - fscache_relinquish_cookie(cookie, 0); + fscache_relinquish_cookie(cookie, &ci->i_vino, false); } static bool ceph_fscache_can_enable(void *data) @@ -254,11 +211,11 @@ void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp) if (inode_is_open_for_write(inode)) { dout("fscache_file_set_cookie %p %p disabling cache\n", inode, filp); - fscache_disable_cookie(ci->fscache, false); + fscache_disable_cookie(ci->fscache, &ci->i_vino, false); fscache_uncache_all_inode_pages(ci->fscache, inode); } else { - fscache_enable_cookie(ci->fscache, ceph_fscache_can_enable, - inode); + fscache_enable_cookie(ci->fscache, &ci->i_vino, + ceph_fscache_can_enable, inode); if (fscache_cookie_enabled(ci->fscache)) { dout("fscache_file_set_cookie %p %p enabling cache\n", inode, filp); @@ -385,7 +342,7 @@ void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) WARN_ON_ONCE(!found); mutex_unlock(&ceph_fscache_lock); - __fscache_relinquish_cookie(fsc->fscache, 0); + __fscache_relinquish_cookie(fsc->fscache, NULL, false); } fsc->fscache = NULL; } @@ -402,7 +359,7 @@ void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci) * truncate while the caller holds CEPH_CAP_FILE_RD */ mutex_lock(&ci->i_truncate_mutex); if (!cache_valid(ci)) { - if (fscache_check_consistency(ci->fscache)) + if (fscache_check_consistency(ci->fscache, &ci->i_vino)) fscache_invalidate(ci->fscache); spin_lock(&ci->i_ceph_lock); ci->i_fscache_gen = ci->i_rdcache_gen; diff --git a/fs/cifs/cache.c b/fs/cifs/cache.c index 2c14020..b4fa270 100644 --- a/fs/cifs/cache.c +++ b/fs/cifs/cache.c @@ -46,67 +46,11 @@ void cifs_fscache_unregister(void) } /* - * Key layout of CIFS server cache index object - */ -struct cifs_server_key { - uint16_t family; /* address family */ - __be16 port; /* IP port */ - union { - struct in_addr ipv4_addr; - struct in6_addr ipv6_addr; - } addr[0]; -}; - -/* - * Server object keyed by {IPaddress,port,family} tuple - */ -static uint16_t cifs_server_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t maxbuf) -{ - const struct TCP_Server_Info *server = cookie_netfs_data; - const struct sockaddr *sa = (struct sockaddr *) &server->dstaddr; - const struct sockaddr_in *addr = (struct sockaddr_in *) sa; - const struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) sa; - struct cifs_server_key *key = buffer; - uint16_t key_len = sizeof(struct cifs_server_key); - - memset(key, 0, key_len); - - /* - * Should not be a problem as sin_family/sin6_family overlays - * sa_family field - */ - switch (sa->sa_family) { - case AF_INET: - key->family = sa->sa_family; - key->port = addr->sin_port; - key->addr[0].ipv4_addr = addr->sin_addr; - key_len += sizeof(key->addr[0].ipv4_addr); - break; - - case AF_INET6: - key->family = sa->sa_family; - key->port = addr6->sin6_port; - key->addr[0].ipv6_addr = addr6->sin6_addr; - key_len += sizeof(key->addr[0].ipv6_addr); - break; - - default: - cifs_dbg(VFS, "Unknown network family '%d'\n", sa->sa_family); - key_len = 0; - break; - } - - return key_len; -} - -/* * Server object for FS-Cache */ const struct fscache_cookie_def cifs_fscache_server_index_def = { .name = "CIFS.server", .type = FSCACHE_COOKIE_TYPE_INDEX, - .get_key = cifs_server_get_key, }; /* @@ -116,7 +60,7 @@ struct cifs_fscache_super_auxdata { u64 resource_id; /* unique server resource id */ }; -static char *extract_sharename(const char *treename) +char *extract_sharename(const char *treename) { const char *src; char *delim, *dst; @@ -140,52 +84,6 @@ static char *extract_sharename(const char *treename) return dst; } -/* - * Superblock object currently keyed by share name - */ -static uint16_t cifs_super_get_key(const void *cookie_netfs_data, void *buffer, - uint16_t maxbuf) -{ - const struct cifs_tcon *tcon = cookie_netfs_data; - char *sharename; - uint16_t len; - - sharename = extract_sharename(tcon->treeName); - if (IS_ERR(sharename)) { - cifs_dbg(FYI, "%s: couldn't extract sharename\n", __func__); - sharename = NULL; - return 0; - } - - len = strlen(sharename); - if (len > maxbuf) - return 0; - - memcpy(buffer, sharename, len); - - kfree(sharename); - - return len; -} - -static uint16_t -cifs_fscache_super_get_aux(const void *cookie_netfs_data, void *buffer, - uint16_t maxbuf) -{ - struct cifs_fscache_super_auxdata auxdata; - const struct cifs_tcon *tcon = cookie_netfs_data; - - memset(&auxdata, 0, sizeof(auxdata)); - auxdata.resource_id = tcon->resource_id; - - if (maxbuf > sizeof(auxdata)) - maxbuf = sizeof(auxdata); - - memcpy(buffer, &auxdata, maxbuf); - - return maxbuf; -} - static enum fscache_checkaux cifs_fscache_super_check_aux(void *cookie_netfs_data, const void *data, @@ -212,36 +110,9 @@ fscache_checkaux cifs_fscache_super_check_aux(void *cookie_netfs_data, const struct fscache_cookie_def cifs_fscache_super_index_def = { .name = "CIFS.super", .type = FSCACHE_COOKIE_TYPE_INDEX, - .get_key = cifs_super_get_key, - .get_aux = cifs_fscache_super_get_aux, .check_aux = cifs_fscache_super_check_aux, }; -/* - * Auxiliary data attached to CIFS inode within the cache - */ -struct cifs_fscache_inode_auxdata { - struct timespec last_write_time; - struct timespec last_change_time; - u64 eof; -}; - -static uint16_t cifs_fscache_inode_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t maxbuf) -{ - const struct cifsInodeInfo *cifsi = cookie_netfs_data; - uint16_t keylen; - - /* use the UniqueId as the key */ - keylen = sizeof(cifsi->uniqueid); - if (keylen > maxbuf) - keylen = 0; - else - memcpy(buffer, &cifsi->uniqueid, keylen); - - return keylen; -} - static void cifs_fscache_inode_get_attr(const void *cookie_netfs_data, uint64_t *size) { @@ -250,26 +121,6 @@ cifs_fscache_inode_get_attr(const void *cookie_netfs_data, uint64_t *size) *size = cifsi->vfs_inode.i_size; } -static uint16_t -cifs_fscache_inode_get_aux(const void *cookie_netfs_data, void *buffer, - uint16_t maxbuf) -{ - struct cifs_fscache_inode_auxdata auxdata; - const struct cifsInodeInfo *cifsi = cookie_netfs_data; - - memset(&auxdata, 0, sizeof(auxdata)); - auxdata.eof = cifsi->server_eof; - auxdata.last_write_time = cifsi->vfs_inode.i_mtime; - auxdata.last_change_time = cifsi->vfs_inode.i_ctime; - - if (maxbuf > sizeof(auxdata)) - maxbuf = sizeof(auxdata); - - memcpy(buffer, &auxdata, maxbuf); - - return maxbuf; -} - static enum fscache_checkaux cifs_fscache_inode_check_aux(void *cookie_netfs_data, const void *data, @@ -295,8 +146,6 @@ fscache_checkaux cifs_fscache_inode_check_aux(void *cookie_netfs_data, const struct fscache_cookie_def cifs_fscache_inode_object_def = { .name = "CIFS.uniqueid", .type = FSCACHE_COOKIE_TYPE_DATAFILE, - .get_key = cifs_fscache_inode_get_key, .get_attr = cifs_fscache_inode_get_attr, - .get_aux = cifs_fscache_inode_get_aux, .check_aux = cifs_fscache_inode_check_aux, }; diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c index 8d4b7bc..b89b59b 100644 --- a/fs/cifs/fscache.c +++ b/fs/cifs/fscache.c @@ -23,11 +23,63 @@ #include "cifs_debug.h" #include "cifs_fs_sb.h" +/* + * Key layout of CIFS server cache index object + */ +struct cifs_server_key { + struct { + uint16_t family; /* address family */ + __be16 port; /* IP port */ + } hdr; + union { + struct in_addr ipv4_addr; + struct in6_addr ipv6_addr; + }; +} __packed; + +/* + * Get a cookie for a server object keyed by {IPaddress,port,family} tuple + */ void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) { + const struct sockaddr *sa = (struct sockaddr *) &server->dstaddr; + const struct sockaddr_in *addr = (struct sockaddr_in *) sa; + const struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) sa; + struct cifs_server_key key; + uint16_t key_len = sizeof(key.hdr); + + memset(&key, 0, sizeof(key)); + + /* + * Should not be a problem as sin_family/sin6_family overlays + * sa_family field + */ + key.hdr.family = sa->sa_family; + switch (sa->sa_family) { + case AF_INET: + key.hdr.port = addr->sin_port; + key.ipv4_addr = addr->sin_addr; + key_len += sizeof(key.ipv4_addr); + break; + + case AF_INET6: + key.hdr.port = addr6->sin6_port; + key.ipv6_addr = addr6->sin6_addr; + key_len += sizeof(key.ipv6_addr); + break; + + default: + cifs_dbg(VFS, "Unknown network family '%d'\n", sa->sa_family); + server->fscache = NULL; + return; + } + server->fscache = fscache_acquire_cookie(cifs_fscache_netfs.primary_index, - &cifs_fscache_server_index_def, server, true); + &cifs_fscache_server_index_def, + &key, key_len, + NULL, 0, + server, true); cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, server, server->fscache); } @@ -36,17 +88,29 @@ 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); + fscache_relinquish_cookie(server->fscache, NULL, false); server->fscache = NULL; } void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) { struct TCP_Server_Info *server = tcon->ses->server; + char *sharename; + + sharename = extract_sharename(tcon->treeName); + if (IS_ERR(sharename)) { + cifs_dbg(FYI, "%s: couldn't extract sharename\n", __func__); + tcon->fscache = NULL; + return; + } tcon->fscache = fscache_acquire_cookie(server->fscache, - &cifs_fscache_super_index_def, tcon, true); + &cifs_fscache_super_index_def, + sharename, strlen(sharename), + &tcon->resource_id, sizeof(tcon->resource_id), + tcon, true); + kfree(sharename); cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, server->fscache, tcon->fscache); } @@ -54,10 +118,28 @@ void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) 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); + fscache_relinquish_cookie(tcon->fscache, &tcon->resource_id, false); tcon->fscache = NULL; } +static void cifs_fscache_acquire_inode_cookie(struct cifsInodeInfo *cifsi, + struct cifs_tcon *tcon) +{ + struct cifs_fscache_inode_auxdata auxdata; + + memset(&auxdata, 0, sizeof(auxdata)); + auxdata.eof = cifsi->server_eof; + auxdata.last_write_time = cifsi->vfs_inode.i_mtime; + auxdata.last_change_time = cifsi->vfs_inode.i_ctime; + + cifsi->fscache = + fscache_acquire_cookie(tcon->fscache, + &cifs_fscache_inode_object_def, + &cifsi->uniqueid, sizeof(cifsi->uniqueid), + &auxdata, sizeof(auxdata), + cifsi, true); +} + static void cifs_fscache_enable_inode_cookie(struct inode *inode) { struct cifsInodeInfo *cifsi = CIFS_I(inode); @@ -67,21 +149,28 @@ static void cifs_fscache_enable_inode_cookie(struct inode *inode) 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); - } + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)) + return; + + cifs_fscache_acquire_inode_cookie(cifsi, tcon); + + cifs_dbg(FYI, "%s: got FH cookie (0x%p/0x%p)\n", + __func__, tcon->fscache, cifsi->fscache); } void cifs_fscache_release_inode_cookie(struct inode *inode) { + struct cifs_fscache_inode_auxdata auxdata; struct cifsInodeInfo *cifsi = CIFS_I(inode); if (cifsi->fscache) { + memset(&auxdata, 0, sizeof(auxdata)); + auxdata.eof = cifsi->server_eof; + auxdata.last_write_time = cifsi->vfs_inode.i_mtime; + auxdata.last_change_time = cifsi->vfs_inode.i_ctime; + cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache); - fscache_relinquish_cookie(cifsi->fscache, 0); + fscache_relinquish_cookie(cifsi->fscache, &auxdata, false); cifsi->fscache = NULL; } } @@ -93,7 +182,7 @@ static void cifs_fscache_disable_inode_cookie(struct inode *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); + fscache_relinquish_cookie(cifsi->fscache, NULL, true); cifsi->fscache = NULL; } } @@ -110,16 +199,14 @@ 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 cifs_tcon *tcon = cifs_sb_master_tcon(cifs_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); + fscache_relinquish_cookie(cifsi->fscache, NULL, true); - cifsi->fscache = fscache_acquire_cookie( - cifs_sb_master_tcon(cifs_sb)->fscache, - &cifs_fscache_inode_object_def, - cifsi, true); + cifs_fscache_acquire_inode_cookie(cifsi, tcon); cifs_dbg(FYI, "%s: new cookie 0x%p oldcookie 0x%p\n", __func__, cifsi->fscache, old); } @@ -239,4 +326,3 @@ void __cifs_fscache_invalidate_page(struct page *page, struct inode *inode) fscache_wait_on_page_write(cookie, page); fscache_uncache_page(cookie, page); } - diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h index 24794b6..c7e3ac2 100644 --- a/fs/cifs/fscache.h +++ b/fs/cifs/fscache.h @@ -27,6 +27,18 @@ #ifdef CONFIG_CIFS_FSCACHE +/* + * Auxiliary data attached to CIFS inode within the cache + */ +struct cifs_fscache_inode_auxdata { + struct timespec last_write_time; + struct timespec last_change_time; + u64 eof; +}; + +/* + * cache.c + */ extern struct fscache_netfs cifs_fscache_netfs; extern const struct fscache_cookie_def cifs_fscache_server_index_def; extern const struct fscache_cookie_def cifs_fscache_super_index_def; @@ -34,6 +46,7 @@ extern const struct fscache_cookie_def cifs_fscache_inode_object_def; extern int cifs_fscache_register(void); extern void cifs_fscache_unregister(void); +extern char *extract_sharename(const char *); /* * fscache.c diff --git a/fs/fscache/cache.c b/fs/fscache/cache.c index 56cce7f..c184c5a 100644 --- a/fs/fscache/cache.c +++ b/fs/fscache/cache.c @@ -125,7 +125,7 @@ struct fscache_cache *fscache_select_cache_for_object( } /* the parent is unbacked */ - if (cookie->def->type != FSCACHE_COOKIE_TYPE_INDEX) { + if (cookie->type != FSCACHE_COOKIE_TYPE_INDEX) { /* cookie not an index and is unbacked */ spin_unlock(&cookie->lock); _leave(" = NULL [cookie ub,ni]"); diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c index ea1f80da..4d62100 100644 --- a/fs/fscache/cookie.c +++ b/fs/fscache/cookie.c @@ -58,6 +58,8 @@ void fscache_cookie_init_once(void *_cookie) struct fscache_cookie *__fscache_acquire_cookie( struct fscache_cookie *parent, const struct fscache_cookie_def *def, + const void *index_key, size_t index_key_len, + const void *aux_data, size_t aux_data_len, void *netfs_data, bool enable) { @@ -69,6 +71,13 @@ struct fscache_cookie *__fscache_acquire_cookie( parent ? (char *) parent->def->name : "<no-parent>", def->name, netfs_data, enable); + if (!index_key || !index_key_len || index_key_len > 255 || aux_data_len > 255) + return NULL; + if (!aux_data || !aux_data_len) { + aux_data = NULL; + aux_data_len = 0; + } + fscache_stat(&fscache_n_acquires); /* if there's no parent cookie, then we don't create one here either */ @@ -79,11 +88,10 @@ struct fscache_cookie *__fscache_acquire_cookie( } /* validate the definition */ - BUG_ON(!def->get_key); BUG_ON(!def->name[0]); BUG_ON(def->type == FSCACHE_COOKIE_TYPE_INDEX && - parent->def->type != FSCACHE_COOKIE_TYPE_INDEX); + parent->type != FSCACHE_COOKIE_TYPE_INDEX); /* allocate and initialise a cookie */ cookie = kmem_cache_alloc(fscache_cookie_jar, GFP_KERNEL); @@ -93,6 +101,25 @@ struct fscache_cookie *__fscache_acquire_cookie( return NULL; } + cookie->key_len = index_key_len; + cookie->aux_len = aux_data_len; + + if (cookie->key_len <= sizeof(cookie->inline_key)) { + memcpy(cookie->inline_key, index_key, cookie->key_len); + } else { + cookie->key = kmemdup(index_key, cookie->key_len, GFP_KERNEL); + if (!cookie->key) + goto nomem; + } + + if (cookie->aux_len <= sizeof(cookie->inline_aux)) { + memcpy(cookie->inline_aux, aux_data, cookie->aux_len); + } else { + cookie->aux = kmemdup(aux_data, cookie->aux_len, GFP_KERNEL); + if (!cookie->aux) + goto nomem; + } + atomic_set(&cookie->usage, 1); atomic_set(&cookie->n_children, 0); @@ -108,12 +135,13 @@ struct fscache_cookie *__fscache_acquire_cookie( cookie->parent = parent; cookie->netfs_data = netfs_data; cookie->flags = (1 << FSCACHE_COOKIE_NO_DATA_YET); - + cookie->type = def->type; + /* radix tree insertion won't use the preallocation pool unless it's * told it may not wait */ INIT_RADIX_TREE(&cookie->stores, GFP_NOFS & ~__GFP_DIRECT_RECLAIM); - switch (cookie->def->type) { + switch (cookie->type) { case FSCACHE_COOKIE_TYPE_INDEX: fscache_stat(&fscache_n_cookie_index); break; @@ -131,7 +159,7 @@ struct fscache_cookie *__fscache_acquire_cookie( /* if the object is an index then we need do nothing more here * - we create indices on disk when we need them as an index * may exist in multiple caches */ - if (cookie->def->type != FSCACHE_COOKIE_TYPE_INDEX) { + if (cookie->type != FSCACHE_COOKIE_TYPE_INDEX) { if (fscache_acquire_non_index_cookie(cookie) == 0) { set_bit(FSCACHE_COOKIE_ENABLED, &cookie->flags); } else { @@ -150,6 +178,14 @@ struct fscache_cookie *__fscache_acquire_cookie( fscache_stat(&fscache_n_acquires_ok); _leave(" = %p", cookie); return cookie; + +nomem: + if (cookie->aux_len > sizeof(cookie->inline_aux)) + kfree(cookie->aux); + if (cookie->key_len > sizeof(cookie->inline_key)) + kfree(cookie->key); + kmem_cache_free(fscache_cookie_jar, cookie); + return NULL; } EXPORT_SYMBOL(__fscache_acquire_cookie); @@ -157,6 +193,7 @@ EXPORT_SYMBOL(__fscache_acquire_cookie); * Enable a cookie to permit it to accept new operations. */ void __fscache_enable_cookie(struct fscache_cookie *cookie, + const void *aux_data, bool (*can_enable)(void *data), void *data) { @@ -167,12 +204,14 @@ void __fscache_enable_cookie(struct fscache_cookie *cookie, wait_on_bit_lock(&cookie->flags, FSCACHE_COOKIE_ENABLEMENT_LOCK, TASK_UNINTERRUPTIBLE); + fscache_update_aux(cookie, aux_data); + if (test_bit(FSCACHE_COOKIE_ENABLED, &cookie->flags)) goto out_unlock; if (can_enable && !can_enable(data)) { /* The netfs decided it didn't want to enable after all */ - } else if (cookie->def->type != FSCACHE_COOKIE_TYPE_INDEX) { + } else if (cookie->type != FSCACHE_COOKIE_TYPE_INDEX) { /* Wait for outstanding disablement to complete */ __fscache_wait_on_invalidate(cookie); @@ -431,10 +470,7 @@ void __fscache_invalidate(struct fscache_cookie *cookie) * there, and if it's doing that, it may as well just retire the * cookie. */ - ASSERTCMP(cookie->def->type, ==, FSCACHE_COOKIE_TYPE_DATAFILE); - - /* We will be updating the cookie too. */ - BUG_ON(!cookie->def->get_aux); + ASSERTCMP(cookie->type, ==, FSCACHE_COOKIE_TYPE_DATAFILE); /* If there's an object, we tell the object state machine to handle the * invalidation on our behalf, otherwise there's nothing to do. @@ -478,7 +514,7 @@ EXPORT_SYMBOL(__fscache_wait_on_invalidate); /* * update the index entries backing a cookie */ -void __fscache_update_cookie(struct fscache_cookie *cookie) +void __fscache_update_cookie(struct fscache_cookie *cookie, const void *aux_data) { struct fscache_object *object; @@ -492,10 +528,10 @@ void __fscache_update_cookie(struct fscache_cookie *cookie) _enter("{%s}", cookie->def->name); - BUG_ON(!cookie->def->get_aux); - spin_lock(&cookie->lock); + fscache_update_aux(cookie, aux_data); + if (fscache_cookie_enabled(cookie)) { /* update the index entry on disk in each cache backing this * cookie. @@ -514,7 +550,9 @@ EXPORT_SYMBOL(__fscache_update_cookie); /* * Disable a cookie to stop it from accepting new requests from the netfs. */ -void __fscache_disable_cookie(struct fscache_cookie *cookie, bool invalidate) +void __fscache_disable_cookie(struct fscache_cookie *cookie, + const void *aux_data, + bool invalidate) { struct fscache_object *object; bool awaken = false; @@ -533,6 +571,9 @@ void __fscache_disable_cookie(struct fscache_cookie *cookie, bool invalidate) wait_on_bit_lock(&cookie->flags, FSCACHE_COOKIE_ENABLEMENT_LOCK, TASK_UNINTERRUPTIBLE); + + fscache_update_aux(cookie, aux_data); + if (!test_and_clear_bit(FSCACHE_COOKIE_ENABLED, &cookie->flags)) goto out_unlock_enable; @@ -570,7 +611,7 @@ void __fscache_disable_cookie(struct fscache_cookie *cookie, bool invalidate) } /* Make sure any pending writes are cancelled. */ - if (cookie->def->type != FSCACHE_COOKIE_TYPE_INDEX) + if (cookie->type != FSCACHE_COOKIE_TYPE_INDEX) fscache_invalidate_writes(cookie); /* Reset the cookie state if it wasn't relinquished */ @@ -592,7 +633,9 @@ EXPORT_SYMBOL(__fscache_disable_cookie); * - all dependents of this cookie must have already been unregistered * (indices/files/pages) */ -void __fscache_relinquish_cookie(struct fscache_cookie *cookie, bool retire) +void __fscache_relinquish_cookie(struct fscache_cookie *cookie, + const void *aux_data, + bool retire) { fscache_stat(&fscache_n_relinquishes); if (retire) @@ -614,7 +657,7 @@ void __fscache_relinquish_cookie(struct fscache_cookie *cookie, bool retire) if (test_and_set_bit(FSCACHE_COOKIE_RELINQUISHED, &cookie->flags)) BUG(); - __fscache_disable_cookie(cookie, retire); + __fscache_disable_cookie(cookie, aux_data, retire); /* Clear pointers back to the netfs */ cookie->netfs_data = NULL; @@ -656,6 +699,10 @@ void fscache_cookie_put(struct fscache_cookie *cookie, parent = cookie->parent; BUG_ON(!hlist_empty(&cookie->backing_objects)); + if (cookie->aux_len > sizeof(cookie->inline_aux)) + kfree(cookie->aux); + if (cookie->key_len > sizeof(cookie->inline_key)) + kfree(cookie->key); kmem_cache_free(fscache_cookie_jar, cookie); cookie = parent; @@ -670,7 +717,8 @@ void fscache_cookie_put(struct fscache_cookie *cookie, * * NOTE: it only serves no-index type */ -int __fscache_check_consistency(struct fscache_cookie *cookie) +int __fscache_check_consistency(struct fscache_cookie *cookie, + const void *aux_data) { struct fscache_operation *op; struct fscache_object *object; @@ -679,7 +727,7 @@ int __fscache_check_consistency(struct fscache_cookie *cookie) _enter("%p,", cookie); - ASSERTCMP(cookie->def->type, ==, FSCACHE_COOKIE_TYPE_DATAFILE); + ASSERTCMP(cookie->type, ==, FSCACHE_COOKIE_TYPE_DATAFILE); if (fscache_wait_for_deferred_lookup(cookie) < 0) return -ERESTARTSYS; @@ -699,6 +747,8 @@ int __fscache_check_consistency(struct fscache_cookie *cookie) spin_lock(&cookie->lock); + fscache_update_aux(cookie, aux_data); + if (!fscache_cookie_enabled(cookie) || hlist_empty(&cookie->backing_objects)) goto inconsistent; diff --git a/fs/fscache/fsdef.c b/fs/fscache/fsdef.c index 5a117df..1122e97 100644 --- a/fs/fscache/fsdef.c +++ b/fs/fscache/fsdef.c @@ -13,12 +13,6 @@ #include <linux/module.h> #include "internal.h" -static uint16_t fscache_fsdef_netfs_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax); - -static uint16_t fscache_fsdef_netfs_get_aux(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax); - static enum fscache_checkaux fscache_fsdef_netfs_check_aux(void *cookie_netfs_data, const void *data, @@ -60,6 +54,7 @@ struct fscache_cookie fscache_fsdef_index = { .backing_objects = HLIST_HEAD_INIT, .def = &fscache_fsdef_index_def, .flags = 1 << FSCACHE_COOKIE_ENABLED, + .type = FSCACHE_COOKIE_TYPE_INDEX, }; EXPORT_SYMBOL(fscache_fsdef_index); @@ -71,52 +66,10 @@ EXPORT_SYMBOL(fscache_fsdef_index); struct fscache_cookie_def fscache_fsdef_netfs_def = { .name = "FSDEF.netfs", .type = FSCACHE_COOKIE_TYPE_INDEX, - .get_key = fscache_fsdef_netfs_get_key, - .get_aux = fscache_fsdef_netfs_get_aux, .check_aux = fscache_fsdef_netfs_check_aux, }; /* - * get the key data for an FSDEF index record - this is the name of the netfs - * for which this entry is created - */ -static uint16_t fscache_fsdef_netfs_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - const struct fscache_netfs *netfs = cookie_netfs_data; - unsigned klen; - - _enter("{%s.%u},", netfs->name, netfs->version); - - klen = strlen(netfs->name); - if (klen > bufmax) - return 0; - - memcpy(buffer, netfs->name, klen); - return klen; -} - -/* - * get the auxiliary data for an FSDEF index record - this is the index - * structure version number of the netfs for which this version is created - */ -static uint16_t fscache_fsdef_netfs_get_aux(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - const struct fscache_netfs *netfs = cookie_netfs_data; - unsigned dlen; - - _enter("{%s.%u},", netfs->name, netfs->version); - - dlen = sizeof(uint32_t); - if (dlen > bufmax) - return 0; - - memcpy(buffer, &netfs->version, dlen); - return dlen; -} - -/* * check that the index structure version number stored in the auxiliary data * matches the one the netfs gave us */ diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h index c27e2db..5f905a4 100644 --- a/fs/fscache/internal.h +++ b/fs/fscache/internal.h @@ -342,6 +342,27 @@ void fscache_put_context(struct fscache_cookie *cookie, void *context) cookie->def->put_context(cookie->netfs_data, context); } +/* + * Update the auxiliary data on a cookie. + */ +static inline +void fscache_update_aux(struct fscache_cookie *cookie, const void *aux_data) +{ + void *p; + + if (!aux_data) + return; + if (cookie->aux_len <= sizeof(cookie->inline_aux)) + p = cookie->inline_aux; + else + p = cookie->aux; + + if (memcmp(p, aux_data, cookie->aux_len) != 0) { + memcpy(p, aux_data, cookie->aux_len); + set_bit(FSCACHE_COOKIE_AUX_UPDATED, &cookie->flags); + } +} + /*****************************************************************************/ /* * debug tracing diff --git a/fs/fscache/netfs.c b/fs/fscache/netfs.c index c816600..a5998df 100644 --- a/fs/fscache/netfs.c +++ b/fs/fscache/netfs.c @@ -37,6 +37,19 @@ int __fscache_register_netfs(struct fscache_netfs *netfs) return -ENOMEM; } + cookie->key_len = strlen(netfs->name); + if (cookie->key_len <= sizeof(cookie->inline_key)) { + memcpy(cookie->inline_key, netfs->name, strlen(netfs->name)); + } else { + ret = -ENOMEM; + cookie->key = kmemdup(netfs->name, cookie->key_len, GFP_KERNEL); + if (!cookie->key) + goto nomem; + } + + cookie->aux_len = sizeof(netfs->version); + memcpy(cookie->inline_aux, &netfs->version, cookie->aux_len); + /* initialise the primary index cookie */ atomic_set(&cookie->usage, 1); atomic_set(&cookie->n_children, 0); @@ -46,6 +59,7 @@ int __fscache_register_netfs(struct fscache_netfs *netfs) cookie->parent = &fscache_fsdef_index; cookie->netfs_data = netfs; cookie->flags = 1 << FSCACHE_COOKIE_ENABLED; + cookie->type = FSCACHE_COOKIE_TYPE_INDEX; spin_lock_init(&cookie->lock); spin_lock_init(&cookie->stores_lock); @@ -73,6 +87,7 @@ int __fscache_register_netfs(struct fscache_netfs *netfs) already_registered: up_write(&fscache_addremove_sem); +nomem: if (ret < 0) kmem_cache_free(fscache_cookie_jar, cookie); @@ -92,7 +107,7 @@ void __fscache_unregister_netfs(struct fscache_netfs *netfs) down_write(&fscache_addremove_sem); list_del(&netfs->link); - fscache_relinquish_cookie(netfs->primary_index, 0); + fscache_relinquish_cookie(netfs->primary_index, NULL, false); up_write(&fscache_addremove_sem); diff --git a/fs/fscache/object-list.c b/fs/fscache/object-list.c index 0438d4c..43e6e28 100644 --- a/fs/fscache/object-list.c +++ b/fs/fscache/object-list.c @@ -36,8 +36,6 @@ struct fscache_objlist_data { #define FSCACHE_OBJLIST_CONFIG_NOEVENTS 0x00000800 /* show objects without no events */ #define FSCACHE_OBJLIST_CONFIG_WORK 0x00001000 /* show objects with work */ #define FSCACHE_OBJLIST_CONFIG_NOWORK 0x00002000 /* show objects without work */ - - u8 buf[512]; /* key and aux data buffer */ }; /* @@ -170,7 +168,7 @@ static int fscache_objlist_show(struct seq_file *m, void *v) struct fscache_cookie *cookie; unsigned long config = data->config; char _type[3], *type; - u8 *buf = data->buf, *p; + u8 *p; if ((unsigned long) v == 1) { seq_puts(m, "OBJECT PARENT STAT CHLDN OPS OOP IPR EX READS" @@ -254,7 +252,7 @@ static int fscache_objlist_show(struct seq_file *m, void *v) if (fscache_use_cookie(obj)) { uint16_t keylen = 0, auxlen = 0; - switch (cookie->def->type) { + switch (cookie->type) { case 0: type = "IX"; break; @@ -263,7 +261,7 @@ static int fscache_objlist_show(struct seq_file *m, void *v) break; default: snprintf(_type, sizeof(_type), "%02u", - cookie->def->type); + cookie->type); type = _type; break; } @@ -274,30 +272,30 @@ static int fscache_objlist_show(struct seq_file *m, void *v) cookie->flags, cookie->netfs_data); - if (cookie->def->get_key && - config & FSCACHE_OBJLIST_CONFIG_KEY) - keylen = cookie->def->get_key(cookie->netfs_data, - buf, 400); + if (config & FSCACHE_OBJLIST_CONFIG_KEY) + keylen = cookie->key_len; - if (cookie->def->get_aux && - config & FSCACHE_OBJLIST_CONFIG_AUX) - auxlen = cookie->def->get_aux(cookie->netfs_data, - buf + keylen, 512 - keylen); - fscache_unuse_cookie(obj); + if (config & FSCACHE_OBJLIST_CONFIG_AUX) + auxlen = cookie->aux_len; if (keylen > 0 || auxlen > 0) { seq_puts(m, " "); - for (p = buf; keylen > 0; keylen--) + p = keylen <= sizeof(cookie->inline_key) ? + cookie->inline_key : cookie->key; + for (; keylen > 0; keylen--) seq_printf(m, "%02x", *p++); if (auxlen > 0) { if (config & FSCACHE_OBJLIST_CONFIG_KEY) seq_puts(m, ", "); + p = auxlen <= sizeof(cookie->inline_aux) ? + cookie->inline_aux : cookie->aux; for (; auxlen > 0; auxlen--) seq_printf(m, "%02x", *p++); } } seq_puts(m, "\n"); + fscache_unuse_cookie(obj); } else { seq_puts(m, "<no_netfs>\n"); } diff --git a/fs/fscache/object.c b/fs/fscache/object.c index 7c0ddb7..a7b28f8 100644 --- a/fs/fscache/object.c +++ b/fs/fscache/object.c @@ -144,6 +144,7 @@ static void fscache_put_object(struct fscache_object *, enum fscache_obj_ref_trace); static bool fscache_enqueue_dependents(struct fscache_object *, int); static void fscache_dequeue_object(struct fscache_object *); +static void fscache_update_aux_data(struct fscache_object *); /* * we need to notify the parent when an op completes that we had outstanding @@ -711,6 +712,11 @@ static const struct fscache_state *fscache_drop_object(struct fscache_object *ob ASSERT(cookie != NULL); ASSERT(!hlist_unhashed(&object->cookie_link)); + if (test_bit(FSCACHE_COOKIE_AUX_UPDATED, &cookie->flags)) { + _debug("final update"); + fscache_update_aux_data(object); + } + /* Make sure the cookie no longer points here and that the netfs isn't * waiting for us. */ @@ -1037,6 +1043,17 @@ static const struct fscache_state *fscache_invalidate_object(struct fscache_obje } /* + * Update auxiliary data. + */ +static void fscache_update_aux_data(struct fscache_object *object) +{ + fscache_stat(&fscache_n_updates_run); + fscache_stat(&fscache_n_cop_update_object); + object->cache->ops->update_object(object); + fscache_stat_d(&fscache_n_cop_update_object); +} + +/* * Asynchronously update an object. */ static const struct fscache_state *fscache_update_object(struct fscache_object *object, @@ -1044,10 +1061,7 @@ static const struct fscache_state *fscache_update_object(struct fscache_object * { _enter("{OBJ%x},%d", object->debug_id, event); - fscache_stat(&fscache_n_updates_run); - fscache_stat(&fscache_n_cop_update_object); - object->cache->ops->update_object(object); - fscache_stat_d(&fscache_n_cop_update_object); + fscache_update_aux_data(object); _leave(""); return transit_to(WAIT_FOR_CMD); diff --git a/fs/fscache/operation.c b/fs/fscache/operation.c index 7a071e1..e30c597 100644 --- a/fs/fscache/operation.c +++ b/fs/fscache/operation.c @@ -506,7 +506,7 @@ void fscache_put_operation(struct fscache_operation *op) if (!atomic_dec_and_test(&op->usage)) return; - trace_fscache_op(op->object->cookie, op, fscache_op_put); + trace_fscache_op(op->object ? op->object->cookie : NULL, op, fscache_op_put); _debug("PUT OP"); ASSERTIFCMP(op->state != FSCACHE_OP_ST_INITIALISED && diff --git a/fs/nfs/fscache-index.c b/fs/nfs/fscache-index.c index 0ee4b93..6fd3679 100644 --- a/fs/nfs/fscache-index.c +++ b/fs/nfs/fscache-index.c @@ -50,59 +50,6 @@ void nfs_fscache_unregister(void) } /* - * Layout of the key for an NFS server cache object. - */ -struct nfs_server_key { - uint16_t nfsversion; /* NFS protocol version */ - uint16_t family; /* address family */ - uint16_t port; /* IP port */ - union { - struct in_addr ipv4_addr; /* IPv4 address */ - struct in6_addr ipv6_addr; /* IPv6 address */ - } addr[0]; -}; - -/* - * Generate a key to describe a server in the main NFS index - * - We return the length of the key, or 0 if we can't generate one - */ -static uint16_t nfs_server_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - const struct nfs_client *clp = cookie_netfs_data; - const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) &clp->cl_addr; - const struct sockaddr_in *sin = (struct sockaddr_in *) &clp->cl_addr; - struct nfs_server_key *key = buffer; - uint16_t len = sizeof(struct nfs_server_key); - - memset(key, 0, len); - key->nfsversion = clp->rpc_ops->version; - key->family = clp->cl_addr.ss_family; - - switch (clp->cl_addr.ss_family) { - case AF_INET: - key->port = sin->sin_port; - key->addr[0].ipv4_addr = sin->sin_addr; - len += sizeof(key->addr[0].ipv4_addr); - break; - - case AF_INET6: - key->port = sin6->sin6_port; - key->addr[0].ipv6_addr = sin6->sin6_addr; - len += sizeof(key->addr[0].ipv6_addr); - break; - - default: - printk(KERN_WARNING "NFS: Unknown network family '%d'\n", - clp->cl_addr.ss_family); - len = 0; - break; - } - - return len; -} - -/* * Define the server object for FS-Cache. This is used to describe a server * object to fscache_acquire_cookie(). It is keyed by the NFS protocol and * server address parameters. @@ -110,33 +57,9 @@ static uint16_t nfs_server_get_key(const void *cookie_netfs_data, const struct fscache_cookie_def nfs_fscache_server_index_def = { .name = "NFS.server", .type = FSCACHE_COOKIE_TYPE_INDEX, - .get_key = nfs_server_get_key, }; /* - * Generate a key to describe a superblock key in the main NFS index - */ -static uint16_t nfs_super_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - const struct nfs_fscache_key *key; - const struct nfs_server *nfss = cookie_netfs_data; - uint16_t len; - - key = nfss->fscache_key; - len = sizeof(key->key) + key->key.uniq_len; - if (len > bufmax) { - len = 0; - } else { - memcpy(buffer, &key->key, sizeof(key->key)); - memcpy(buffer + sizeof(key->key), - key->key.uniquifier, key->key.uniq_len); - } - - return len; -} - -/* * Define the superblock object for FS-Cache. This is used to describe a * superblock object to fscache_acquire_cookie(). It is keyed by all the NFS * parameters that might cause a separate superblock. @@ -144,41 +67,9 @@ static uint16_t nfs_super_get_key(const void *cookie_netfs_data, const struct fscache_cookie_def nfs_fscache_super_index_def = { .name = "NFS.super", .type = FSCACHE_COOKIE_TYPE_INDEX, - .get_key = nfs_super_get_key, }; /* - * Definition of the auxiliary data attached to NFS inode storage objects - * within the cache. - * - * The contents of this struct are recorded in the on-disk local cache in the - * auxiliary data attached to the data storage object backing an inode. This - * permits coherency to be managed when a new inode binds to an already extant - * cache object. - */ -struct nfs_fscache_inode_auxdata { - struct timespec mtime; - struct timespec ctime; - loff_t size; - u64 change_attr; -}; - -/* - * Generate a key to describe an NFS inode in an NFS server's index - */ -static uint16_t nfs_fscache_inode_get_key(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - const struct nfs_inode *nfsi = cookie_netfs_data; - uint16_t nsize; - - /* use the inode's NFS filehandle as the key */ - nsize = nfsi->fh.size; - memcpy(buffer, nfsi->fh.data, nsize); - return nsize; -} - -/* * Get certain file attributes from the netfs data * - This function can be absent for an index * - Not permitted to return an error @@ -193,35 +84,6 @@ static void nfs_fscache_inode_get_attr(const void *cookie_netfs_data, } /* - * Get the auxiliary data from netfs data - * - This function can be absent if the index carries no state data - * - Should store the auxiliary data in the buffer - * - Should return the amount of amount stored - * - Not permitted to return an error - * - The netfs data from the cookie being used as the source is presented - */ -static uint16_t nfs_fscache_inode_get_aux(const void *cookie_netfs_data, - void *buffer, uint16_t bufmax) -{ - struct nfs_fscache_inode_auxdata auxdata; - const struct nfs_inode *nfsi = cookie_netfs_data; - - memset(&auxdata, 0, sizeof(auxdata)); - auxdata.size = nfsi->vfs_inode.i_size; - auxdata.mtime = nfsi->vfs_inode.i_mtime; - auxdata.ctime = nfsi->vfs_inode.i_ctime; - - if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4) - auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode); - - if (bufmax > sizeof(auxdata)) - bufmax = sizeof(auxdata); - - memcpy(buffer, &auxdata, bufmax); - return bufmax; -} - -/* * Consult the netfs about the state of an object * - This function can be absent if the index carries no state data * - The netfs data from the cookie being used as the target is @@ -288,9 +150,7 @@ static void nfs_fh_put_context(void *cookie_netfs_data, void *context) const struct fscache_cookie_def nfs_fscache_inode_object_def = { .name = "NFS.fh", .type = FSCACHE_COOKIE_TYPE_DATAFILE, - .get_key = nfs_fscache_inode_get_key, .get_attr = nfs_fscache_inode_get_attr, - .get_aux = nfs_fscache_inode_get_aux, .check_aux = nfs_fscache_inode_check_aux, .get_context = nfs_fh_get_context, .put_context = nfs_fh_put_context, diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index d63bea8..c45ba26 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -18,6 +18,7 @@ #include <linux/in6.h> #include <linux/seq_file.h> #include <linux/slab.h> +#include <linux/iversion.h> #include "internal.h" #include "iostat.h" @@ -29,6 +30,21 @@ static struct rb_root nfs_fscache_keys = RB_ROOT; static DEFINE_SPINLOCK(nfs_fscache_keys_lock); /* + * Layout of the key for an NFS server cache object. + */ +struct nfs_server_key { + struct { + uint16_t nfsversion; /* NFS protocol version */ + uint16_t family; /* address family */ + __be16 port; /* IP port */ + } hdr; + union { + struct in_addr ipv4_addr; /* IPv4 address */ + struct in6_addr ipv6_addr; /* IPv6 address */ + }; +} __packed; + +/* * Get the per-client index cookie for an NFS client if the appropriate mount * flag was set * - We always try and get an index cookie for the client, but get filehandle @@ -36,9 +52,40 @@ static DEFINE_SPINLOCK(nfs_fscache_keys_lock); */ void nfs_fscache_get_client_cookie(struct nfs_client *clp) { + const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) &clp->cl_addr; + const struct sockaddr_in *sin = (struct sockaddr_in *) &clp->cl_addr; + struct nfs_server_key key; + uint16_t len = sizeof(key.hdr); + + memset(&key, 0, sizeof(key)); + key.hdr.nfsversion = clp->rpc_ops->version; + key.hdr.family = clp->cl_addr.ss_family; + + switch (clp->cl_addr.ss_family) { + case AF_INET: + key.hdr.port = sin->sin_port; + key.ipv4_addr = sin->sin_addr; + len += sizeof(key.ipv4_addr); + break; + + case AF_INET6: + key.hdr.port = sin6->sin6_port; + key.ipv6_addr = sin6->sin6_addr; + len += sizeof(key.ipv6_addr); + break; + + default: + printk(KERN_WARNING "NFS: Unknown network family '%d'\n", + clp->cl_addr.ss_family); + clp->fscache = NULL; + return; + } + /* create a cache index for looking up filehandles */ clp->fscache = fscache_acquire_cookie(nfs_fscache_netfs.primary_index, &nfs_fscache_server_index_def, + &key, len, + NULL, 0, clp, true); dfprintk(FSCACHE, "NFS: get client cookie (0x%p/0x%p)\n", clp, clp->fscache); @@ -52,7 +99,7 @@ void nfs_fscache_release_client_cookie(struct nfs_client *clp) dfprintk(FSCACHE, "NFS: releasing client cookie (0x%p/0x%p)\n", clp, clp->fscache); - fscache_relinquish_cookie(clp->fscache, 0); + fscache_relinquish_cookie(clp->fscache, NULL, false); clp->fscache = NULL; } @@ -139,6 +186,8 @@ void nfs_fscache_get_super_cookie(struct super_block *sb, const char *uniq, int /* create a cache index for looking up filehandles */ nfss->fscache = fscache_acquire_cookie(nfss->nfs_client->fscache, &nfs_fscache_super_index_def, + key, sizeof(*key) + ulen, + NULL, 0, nfss, true); dfprintk(FSCACHE, "NFS: get superblock cookie (0x%p/0x%p)\n", nfss, nfss->fscache); @@ -163,7 +212,7 @@ void nfs_fscache_release_super_cookie(struct super_block *sb) dfprintk(FSCACHE, "NFS: releasing superblock cookie (0x%p/0x%p)\n", nfss, nfss->fscache); - fscache_relinquish_cookie(nfss->fscache, 0); + fscache_relinquish_cookie(nfss->fscache, NULL, false); nfss->fscache = NULL; if (nfss->fscache_key) { @@ -180,13 +229,25 @@ void nfs_fscache_release_super_cookie(struct super_block *sb) */ void nfs_fscache_init_inode(struct inode *inode) { + struct nfs_fscache_inode_auxdata auxdata; struct nfs_inode *nfsi = NFS_I(inode); nfsi->fscache = NULL; if (!S_ISREG(inode->i_mode)) return; + + memset(&auxdata, 0, sizeof(auxdata)); + auxdata.size = nfsi->vfs_inode.i_size; + auxdata.mtime = nfsi->vfs_inode.i_mtime; + auxdata.ctime = nfsi->vfs_inode.i_ctime; + + if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4) + auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode); + nfsi->fscache = fscache_acquire_cookie(NFS_SB(inode->i_sb)->fscache, &nfs_fscache_inode_object_def, + nfsi->fh.data, nfsi->fh.size, + &auxdata, sizeof(auxdata), nfsi, false); } @@ -195,12 +256,17 @@ void nfs_fscache_init_inode(struct inode *inode) */ void nfs_fscache_clear_inode(struct inode *inode) { + struct nfs_fscache_inode_auxdata auxdata; struct nfs_inode *nfsi = NFS_I(inode); struct fscache_cookie *cookie = nfs_i_fscache(inode); dfprintk(FSCACHE, "NFS: clear cookie (0x%p/0x%p)\n", nfsi, cookie); - fscache_relinquish_cookie(cookie, false); + memset(&auxdata, 0, sizeof(auxdata)); + auxdata.size = nfsi->vfs_inode.i_size; + auxdata.mtime = nfsi->vfs_inode.i_mtime; + auxdata.ctime = nfsi->vfs_inode.i_ctime; + fscache_relinquish_cookie(cookie, &auxdata, false); nfsi->fscache = NULL; } @@ -232,20 +298,27 @@ static bool nfs_fscache_can_enable(void *data) */ void nfs_fscache_open_file(struct inode *inode, struct file *filp) { + struct nfs_fscache_inode_auxdata auxdata; struct nfs_inode *nfsi = NFS_I(inode); struct fscache_cookie *cookie = nfs_i_fscache(inode); if (!fscache_cookie_valid(cookie)) return; + memset(&auxdata, 0, sizeof(auxdata)); + auxdata.size = nfsi->vfs_inode.i_size; + auxdata.mtime = nfsi->vfs_inode.i_mtime; + auxdata.ctime = nfsi->vfs_inode.i_ctime; + if (inode_is_open_for_write(inode)) { dfprintk(FSCACHE, "NFS: nfsi 0x%p disabling cache\n", nfsi); clear_bit(NFS_INO_FSCACHE, &nfsi->flags); - fscache_disable_cookie(cookie, true); + fscache_disable_cookie(cookie, &auxdata, true); fscache_uncache_all_inode_pages(cookie, inode); } else { dfprintk(FSCACHE, "NFS: nfsi 0x%p enabling cache\n", nfsi); - fscache_enable_cookie(cookie, nfs_fscache_can_enable, inode); + fscache_enable_cookie(cookie, &auxdata, + nfs_fscache_can_enable, inode); if (fscache_cookie_enabled(cookie)) set_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags); } diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index d7fe3e7..96e989f 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -57,6 +57,22 @@ struct nfs_fscache_key { }; /* + * Definition of the auxiliary data attached to NFS inode storage objects + * within the cache. + * + * The contents of this struct are recorded in the on-disk local cache in the + * auxiliary data attached to the data storage object backing an inode. This + * permits coherency to be managed when a new inode binds to an already extant + * cache object. + */ +struct nfs_fscache_inode_auxdata { + struct timespec mtime; + struct timespec ctime; + loff_t size; + u64 change_attr; +}; + +/* * fscache-index.c */ extern struct fscache_netfs nfs_fscache_netfs; |