diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
commit | 863981e96738983919de841ec669e157e6bdaeb0 (patch) | |
tree | d6d89a12e7eb8017837c057935a2271290907f76 /drivers/staging/lustre/lustre/llite/vvp_page.c | |
parent | 8dec7c70575785729a6a9e6719a955e9c545bcab (diff) |
Linux-libre 4.7.1-gnupck-4.7.1-gnu
Diffstat (limited to 'drivers/staging/lustre/lustre/llite/vvp_page.c')
-rw-r--r-- | drivers/staging/lustre/lustre/llite/vvp_page.c | 211 |
1 files changed, 119 insertions, 92 deletions
diff --git a/drivers/staging/lustre/lustre/llite/vvp_page.c b/drivers/staging/lustre/lustre/llite/vvp_page.c index 33ca3eb34..6cd2af7a9 100644 --- a/drivers/staging/lustre/lustre/llite/vvp_page.c +++ b/drivers/staging/lustre/lustre/llite/vvp_page.c @@ -41,9 +41,16 @@ #define DEBUG_SUBSYSTEM S_LLITE -#include "../include/obd.h" +#include <linux/atomic.h> +#include <linux/bitops.h> +#include <linux/mm.h> +#include <linux/mutex.h> +#include <linux/page-flags.h> +#include <linux/pagemap.h> + #include "../include/lustre_lite.h" +#include "llite_internal.h" #include "vvp_internal.h" /***************************************************************************** @@ -52,9 +59,9 @@ * */ -static void vvp_page_fini_common(struct ccc_page *cp) +static void vvp_page_fini_common(struct vvp_page *vpg) { - struct page *vmpage = cp->cpg_page; + struct page *vmpage = vpg->vpg_page; LASSERT(vmpage); put_page(vmpage); @@ -63,23 +70,23 @@ static void vvp_page_fini_common(struct ccc_page *cp) static void vvp_page_fini(const struct lu_env *env, struct cl_page_slice *slice) { - struct ccc_page *cp = cl2ccc_page(slice); - struct page *vmpage = cp->cpg_page; + struct vvp_page *vpg = cl2vvp_page(slice); + struct page *vmpage = vpg->vpg_page; /* * vmpage->private was already cleared when page was moved into * VPG_FREEING state. */ LASSERT((struct cl_page *)vmpage->private != slice->cpl_page); - vvp_page_fini_common(cp); + vvp_page_fini_common(vpg); } static int vvp_page_own(const struct lu_env *env, const struct cl_page_slice *slice, struct cl_io *io, int nonblock) { - struct ccc_page *vpg = cl2ccc_page(slice); - struct page *vmpage = vpg->cpg_page; + struct vvp_page *vpg = cl2vvp_page(slice); + struct page *vmpage = vpg->vpg_page; LASSERT(vmpage); if (nonblock) { @@ -96,6 +103,7 @@ static int vvp_page_own(const struct lu_env *env, lock_page(vmpage); wait_on_page_writeback(vmpage); + return 0; } @@ -136,41 +144,15 @@ static void vvp_page_discard(const struct lu_env *env, struct cl_io *unused) { struct page *vmpage = cl2vm_page(slice); - struct address_space *mapping; - struct ccc_page *cpg = cl2ccc_page(slice); + struct vvp_page *vpg = cl2vvp_page(slice); LASSERT(vmpage); LASSERT(PageLocked(vmpage)); - mapping = vmpage->mapping; - - if (cpg->cpg_defer_uptodate && !cpg->cpg_ra_used) - ll_ra_stats_inc(mapping, RA_STAT_DISCARDED); + if (vpg->vpg_defer_uptodate && !vpg->vpg_ra_used) + ll_ra_stats_inc(vmpage->mapping->host, RA_STAT_DISCARDED); - /* - * truncate_complete_page() calls - * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete(). - */ - truncate_complete_page(mapping, vmpage); -} - -static int vvp_page_unmap(const struct lu_env *env, - const struct cl_page_slice *slice, - struct cl_io *unused) -{ - struct page *vmpage = cl2vm_page(slice); - __u64 offset; - - LASSERT(vmpage); - LASSERT(PageLocked(vmpage)); - - offset = vmpage->index << PAGE_SHIFT; - - /* - * XXX is it safe to call this with the page lock held? - */ - ll_teardown_mmaps(vmpage->mapping, offset, offset + PAGE_SIZE); - return 0; + ll_invalidate_page(vmpage); } static void vvp_page_delete(const struct lu_env *env, @@ -179,12 +161,20 @@ static void vvp_page_delete(const struct lu_env *env, struct page *vmpage = cl2vm_page(slice); struct inode *inode = vmpage->mapping->host; struct cl_object *obj = slice->cpl_obj; + struct cl_page *page = slice->cpl_page; + int refc; LASSERT(PageLocked(vmpage)); - LASSERT((struct cl_page *)vmpage->private == slice->cpl_page); - LASSERT(inode == ccc_object_inode(obj)); + LASSERT((struct cl_page *)vmpage->private == page); + LASSERT(inode == vvp_object_inode(obj)); - vvp_write_complete(cl2ccc(obj), cl2ccc_page(slice)); + vvp_write_complete(cl2vvp(obj), cl2vvp_page(slice)); + + /* Drop the reference count held in vvp_page_init */ + refc = atomic_dec_return(&page->cp_ref); + LASSERTF(refc >= 1, "page = %p, refc = %d\n", page, refc); + + ClearPageUptodate(vmpage); ClearPagePrivate(vmpage); vmpage->private = 0; /* @@ -237,7 +227,7 @@ static int vvp_page_prep_write(const struct lu_env *env, if (!pg->cp_sync_io) set_page_writeback(vmpage); - vvp_write_pending(cl2ccc(slice->cpl_obj), cl2ccc_page(slice)); + vvp_write_pending(cl2vvp(slice->cpl_obj), cl2vvp_page(slice)); return 0; } @@ -250,11 +240,11 @@ static int vvp_page_prep_write(const struct lu_env *env, */ static void vvp_vmpage_error(struct inode *inode, struct page *vmpage, int ioret) { - struct ccc_object *obj = cl_inode2ccc(inode); + struct vvp_object *obj = cl_inode2vvp(inode); if (ioret == 0) { ClearPageError(vmpage); - obj->cob_discard_page_warned = 0; + obj->vob_discard_page_warned = 0; } else { SetPageError(vmpage); if (ioret == -ENOSPC) @@ -263,8 +253,8 @@ static void vvp_vmpage_error(struct inode *inode, struct page *vmpage, int ioret set_bit(AS_EIO, &inode->i_mapping->flags); if ((ioret == -ESHUTDOWN || ioret == -EINTR) && - obj->cob_discard_page_warned == 0) { - obj->cob_discard_page_warned = 1; + obj->vob_discard_page_warned == 0) { + obj->vob_discard_page_warned = 1; ll_dirty_page_discard_warn(vmpage, ioret); } } @@ -274,22 +264,23 @@ static void vvp_page_completion_read(const struct lu_env *env, const struct cl_page_slice *slice, int ioret) { - struct ccc_page *cp = cl2ccc_page(slice); - struct page *vmpage = cp->cpg_page; - struct cl_page *page = cl_page_top(slice->cpl_page); - struct inode *inode = ccc_object_inode(page->cp_obj); + struct vvp_page *vpg = cl2vvp_page(slice); + struct page *vmpage = vpg->vpg_page; + struct cl_page *page = slice->cpl_page; + struct inode *inode = vvp_object_inode(page->cp_obj); LASSERT(PageLocked(vmpage)); CL_PAGE_HEADER(D_PAGE, env, page, "completing READ with %d\n", ioret); - if (cp->cpg_defer_uptodate) + if (vpg->vpg_defer_uptodate) ll_ra_count_put(ll_i2sbi(inode), 1); if (ioret == 0) { - if (!cp->cpg_defer_uptodate) + if (!vpg->vpg_defer_uptodate) cl_page_export(env, page, 1); - } else - cp->cpg_defer_uptodate = 0; + } else { + vpg->vpg_defer_uptodate = 0; + } if (!page->cp_sync_io) unlock_page(vmpage); @@ -299,9 +290,9 @@ static void vvp_page_completion_write(const struct lu_env *env, const struct cl_page_slice *slice, int ioret) { - struct ccc_page *cp = cl2ccc_page(slice); + struct vvp_page *vpg = cl2vvp_page(slice); struct cl_page *pg = slice->cpl_page; - struct page *vmpage = cp->cpg_page; + struct page *vmpage = vpg->vpg_page; CL_PAGE_HEADER(D_PAGE, env, pg, "completing WRITE with %d\n", ioret); @@ -315,8 +306,8 @@ static void vvp_page_completion_write(const struct lu_env *env, * and then re-add the page into pending transfer queue. -jay */ - cp->cpg_write_queued = 0; - vvp_write_complete(cl2ccc(slice->cpl_obj), cp); + vpg->vpg_write_queued = 0; + vvp_write_complete(cl2vvp(slice->cpl_obj), vpg); if (pg->cp_sync_io) { LASSERT(PageLocked(vmpage)); @@ -327,7 +318,7 @@ static void vvp_page_completion_write(const struct lu_env *env, * Only mark the page error only when it's an async write * because applications won't wait for IO to finish. */ - vvp_vmpage_error(ccc_object_inode(pg->cp_obj), vmpage, ioret); + vvp_vmpage_error(vvp_object_inode(pg->cp_obj), vmpage, ioret); end_page_writeback(vmpage); } @@ -359,7 +350,7 @@ static int vvp_page_make_ready(const struct lu_env *env, LASSERT(pg->cp_state == CPS_CACHED); /* This actually clears the dirty bit in the radix tree. */ set_page_writeback(vmpage); - vvp_write_pending(cl2ccc(slice->cpl_obj), cl2ccc_page(slice)); + vvp_write_pending(cl2vvp(slice->cpl_obj), cl2vvp_page(slice)); CL_PAGE_HEADER(D_PAGE, env, pg, "readied\n"); } else if (pg->cp_state == CPS_PAGEOUT) { /* is it possible for osc_flush_async_page() to already @@ -375,24 +366,51 @@ static int vvp_page_make_ready(const struct lu_env *env, return result; } +static int vvp_page_is_under_lock(const struct lu_env *env, + const struct cl_page_slice *slice, + struct cl_io *io, pgoff_t *max_index) +{ + if (io->ci_type == CIT_READ || io->ci_type == CIT_WRITE || + io->ci_type == CIT_FAULT) { + struct vvp_io *vio = vvp_env_io(env); + + if (unlikely(vio->vui_fd->fd_flags & LL_FILE_GROUP_LOCKED)) + *max_index = CL_PAGE_EOF; + } + return 0; +} + static int vvp_page_print(const struct lu_env *env, const struct cl_page_slice *slice, void *cookie, lu_printer_t printer) { - struct ccc_page *vp = cl2ccc_page(slice); - struct page *vmpage = vp->cpg_page; + struct vvp_page *vpg = cl2vvp_page(slice); + struct page *vmpage = vpg->vpg_page; (*printer)(env, cookie, LUSTRE_VVP_NAME "-page@%p(%d:%d:%d) vm@%p ", - vp, vp->cpg_defer_uptodate, vp->cpg_ra_used, - vp->cpg_write_queued, vmpage); + vpg, vpg->vpg_defer_uptodate, vpg->vpg_ra_used, + vpg->vpg_write_queued, vmpage); if (vmpage) { (*printer)(env, cookie, "%lx %d:%d %lx %lu %slru", (long)vmpage->flags, page_count(vmpage), page_mapcount(vmpage), vmpage->private, - page_index(vmpage), + vmpage->index, list_empty(&vmpage->lru) ? "not-" : ""); } + (*printer)(env, cookie, "\n"); + + return 0; +} + +static int vvp_page_fail(const struct lu_env *env, + const struct cl_page_slice *slice) +{ + /* + * Cached read? + */ + LBUG(); + return 0; } @@ -401,32 +419,38 @@ static const struct cl_page_operations vvp_page_ops = { .cpo_assume = vvp_page_assume, .cpo_unassume = vvp_page_unassume, .cpo_disown = vvp_page_disown, - .cpo_vmpage = ccc_page_vmpage, .cpo_discard = vvp_page_discard, .cpo_delete = vvp_page_delete, - .cpo_unmap = vvp_page_unmap, .cpo_export = vvp_page_export, .cpo_is_vmlocked = vvp_page_is_vmlocked, .cpo_fini = vvp_page_fini, .cpo_print = vvp_page_print, - .cpo_is_under_lock = ccc_page_is_under_lock, + .cpo_is_under_lock = vvp_page_is_under_lock, .io = { [CRT_READ] = { .cpo_prep = vvp_page_prep_read, .cpo_completion = vvp_page_completion_read, - .cpo_make_ready = ccc_fail, + .cpo_make_ready = vvp_page_fail, }, [CRT_WRITE] = { .cpo_prep = vvp_page_prep_write, .cpo_completion = vvp_page_completion_write, .cpo_make_ready = vvp_page_make_ready, - } - } + }, + }, }; +static int vvp_transient_page_prep(const struct lu_env *env, + const struct cl_page_slice *slice, + struct cl_io *unused) +{ + /* transient page should always be sent. */ + return 0; +} + static void vvp_transient_page_verify(const struct cl_page *page) { - struct inode *inode = ccc_object_inode(page->cp_obj); + struct inode *inode = vvp_object_inode(page->cp_obj); LASSERT(!inode_trylock(inode)); } @@ -477,7 +501,7 @@ static void vvp_transient_page_discard(const struct lu_env *env, static int vvp_transient_page_is_vmlocked(const struct lu_env *env, const struct cl_page_slice *slice) { - struct inode *inode = ccc_object_inode(slice->cpl_obj); + struct inode *inode = vvp_object_inode(slice->cpl_obj); int locked; locked = !inode_trylock(inode); @@ -497,13 +521,13 @@ vvp_transient_page_completion(const struct lu_env *env, static void vvp_transient_page_fini(const struct lu_env *env, struct cl_page_slice *slice) { - struct ccc_page *cp = cl2ccc_page(slice); + struct vvp_page *vpg = cl2vvp_page(slice); struct cl_page *clp = slice->cpl_page; - struct ccc_object *clobj = cl2ccc(clp->cp_obj); + struct vvp_object *clobj = cl2vvp(clp->cp_obj); - vvp_page_fini_common(cp); - LASSERT(!inode_trylock(clobj->cob_inode)); - clobj->cob_transient_pages--; + vvp_page_fini_common(vpg); + LASSERT(!inode_trylock(clobj->vob_inode)); + clobj->vob_transient_pages--; } static const struct cl_page_operations vvp_transient_page_ops = { @@ -512,45 +536,48 @@ static const struct cl_page_operations vvp_transient_page_ops = { .cpo_unassume = vvp_transient_page_unassume, .cpo_disown = vvp_transient_page_disown, .cpo_discard = vvp_transient_page_discard, - .cpo_vmpage = ccc_page_vmpage, .cpo_fini = vvp_transient_page_fini, .cpo_is_vmlocked = vvp_transient_page_is_vmlocked, .cpo_print = vvp_page_print, - .cpo_is_under_lock = ccc_page_is_under_lock, + .cpo_is_under_lock = vvp_page_is_under_lock, .io = { [CRT_READ] = { - .cpo_prep = ccc_transient_page_prep, + .cpo_prep = vvp_transient_page_prep, .cpo_completion = vvp_transient_page_completion, }, [CRT_WRITE] = { - .cpo_prep = ccc_transient_page_prep, + .cpo_prep = vvp_transient_page_prep, .cpo_completion = vvp_transient_page_completion, } } }; int vvp_page_init(const struct lu_env *env, struct cl_object *obj, - struct cl_page *page, struct page *vmpage) + struct cl_page *page, pgoff_t index) { - struct ccc_page *cpg = cl_object_page_slice(obj, page); + struct vvp_page *vpg = cl_object_page_slice(obj, page); + struct page *vmpage = page->cp_vmpage; - CLOBINVRNT(env, obj, ccc_object_invariant(obj)); + CLOBINVRNT(env, obj, vvp_object_invariant(obj)); - cpg->cpg_page = vmpage; + vpg->vpg_page = vmpage; get_page(vmpage); - INIT_LIST_HEAD(&cpg->cpg_pending_linkage); + INIT_LIST_HEAD(&vpg->vpg_pending_linkage); if (page->cp_type == CPT_CACHEABLE) { + /* in cache, decref in vvp_page_delete */ + atomic_inc(&page->cp_ref); SetPagePrivate(vmpage); vmpage->private = (unsigned long)page; - cl_page_slice_add(page, &cpg->cpg_cl, obj, &vvp_page_ops); + cl_page_slice_add(page, &vpg->vpg_cl, obj, index, + &vvp_page_ops); } else { - struct ccc_object *clobj = cl2ccc(obj); + struct vvp_object *clobj = cl2vvp(obj); - LASSERT(!inode_trylock(clobj->cob_inode)); - cl_page_slice_add(page, &cpg->cpg_cl, obj, + LASSERT(!inode_trylock(clobj->vob_inode)); + cl_page_slice_add(page, &vpg->vpg_cl, obj, index, &vvp_transient_page_ops); - clobj->cob_transient_pages++; + clobj->vob_transient_pages++; } return 0; } |