diff options
Diffstat (limited to 'xlators/performance/read-ahead/src/read-ahead.c')
| -rw-r--r-- | xlators/performance/read-ahead/src/read-ahead.c | 491 |
1 files changed, 293 insertions, 198 deletions
diff --git a/xlators/performance/read-ahead/src/read-ahead.c b/xlators/performance/read-ahead/src/read-ahead.c index e49709c0e..069ab1f1a 100644 --- a/xlators/performance/read-ahead/src/read-ahead.c +++ b/xlators/performance/read-ahead/src/read-ahead.c @@ -1,27 +1,18 @@ /* - Copyright (c) 2006-2011 Gluster, Inc. <http://www.gluster.com> + Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com> This file is part of GlusterFS. - GlusterFS is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published - by the Free Software Foundation; either version 3 of the License, - or (at your option) any later version. - - GlusterFS 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 - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see - <http://www.gnu.org/licenses/>. + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. */ /* TODO: - handle O_DIRECT - maintain offset, flush on lseek - - ensure efficient memory managment in case of random seek + - ensure efficient memory management in case of random seek */ #ifndef _CONFIG_H @@ -44,12 +35,11 @@ read_ahead (call_frame_t *frame, ra_file_t *file); int ra_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, fd_t *fd) + int32_t op_ret, int32_t op_errno, fd_t *fd, dict_t *xdata) { ra_conf_t *conf = NULL; ra_file_t *file = NULL; int ret = 0; - long wbflags = 0; GF_ASSERT (frame); GF_VALIDATE_OR_GOTO (frame->this->name, this, unwind); @@ -60,8 +50,6 @@ ra_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this, goto unwind; } - wbflags = (long)frame->local; - file = GF_CALLOC (1, sizeof (*file), gf_ra_mt_ra_file_t); if (!file) { op_ret = -1; @@ -74,10 +62,6 @@ ra_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this, if ((fd->flags & O_DIRECT) || ((fd->flags & O_ACCMODE) == O_WRONLY)) file->disabled = 1; - if (wbflags & GF_OPEN_NOWB) { - file->disabled = 1; - } - file->offset = (unsigned long long) 0; file->conf = conf; file->pages.next = &file->pages; @@ -116,7 +100,7 @@ ra_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this, unwind: frame->local = NULL; - STACK_UNWIND_STRICT (open, frame, op_ret, op_errno, fd); + STACK_UNWIND_STRICT (open, frame, op_ret, op_errno, fd, xdata); return 0; } @@ -126,7 +110,7 @@ int ra_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, fd_t *fd, inode_t *inode, struct iatt *buf, struct iatt *preparent, - struct iatt *postparent) + struct iatt *postparent, dict_t *xdata) { ra_conf_t *conf = NULL; ra_file_t *file = NULL; @@ -187,7 +171,7 @@ ra_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this, unwind: STACK_UNWIND_STRICT (create, frame, op_ret, op_errno, fd, inode, buf, - preparent, postparent); + preparent, postparent, xdata); return 0; } @@ -195,17 +179,15 @@ unwind: int ra_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, - fd_t *fd, int32_t wbflags) + fd_t *fd, dict_t *xdata) { GF_ASSERT (frame); GF_ASSERT (this); - frame->local = (void *)(long)wbflags; - STACK_WIND (frame, ra_open_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->open, - loc, flags, fd, wbflags); + loc, flags, fd, xdata); return 0; } @@ -213,7 +195,7 @@ ra_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, int ra_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, - mode_t mode, fd_t *fd, dict_t *params) + mode_t mode, mode_t umask, fd_t *fd, dict_t *xdata) { GF_ASSERT (frame); GF_ASSERT (this); @@ -221,7 +203,7 @@ ra_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, STACK_WIND (frame, ra_create_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->create, - loc, flags, mode, fd, params); + loc, flags, mode, umask, fd, xdata); return 0; } @@ -231,7 +213,8 @@ ra_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, */ static void -flush_region (call_frame_t *frame, ra_file_t *file, off_t offset, off_t size) +flush_region (call_frame_t *frame, ra_file_t *file, off_t offset, off_t size, + int for_write) { ra_page_t *trav = NULL; ra_page_t *next = NULL; @@ -243,8 +226,17 @@ flush_region (call_frame_t *frame, ra_file_t *file, off_t offset, off_t size) && trav->offset < (offset + size)) { next = trav->next; - if (trav->offset >= offset && !trav->waitq) { - ra_page_purge (trav); + if (trav->offset >= offset) { + if (!trav->waitq) { + ra_page_purge (trav); + } + else { + trav->stale = 1; + + if (for_write) { + trav->poisoned = 1; + } + } } trav = next; } @@ -352,7 +344,8 @@ out: int ra_need_atime_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iovec *vector, - int32_t count, struct iatt *stbuf, struct iobref *iobref) + int32_t count, struct iatt *stbuf, struct iobref *iobref, + dict_t *xdata) { GF_ASSERT (frame); STACK_DESTROY (frame->root); @@ -392,15 +385,15 @@ dispatch_requests (call_frame_t *frame, ra_file_t *file) trav = ra_page_get (file, trav_offset); if (!trav) { trav = ra_page_create (file, trav_offset); + if (!trav) { + local->op_ret = -1; + local->op_errno = ENOMEM; + goto unlock; + } fault = 1; need_atime_update = 0; } - - if (!trav) { - local->op_ret = -1; - local->op_errno = ENOMEM; - goto unlock; - } + trav->dirty = 0; if (trav->ready) { gf_log (frame->this->name, GF_LOG_TRACE, @@ -443,7 +436,7 @@ dispatch_requests (call_frame_t *frame, ra_file_t *file) STACK_WIND (ra_frame, ra_need_atime_cbk, FIRST_CHILD (frame->this), FIRST_CHILD (frame->this)->fops->readv, - file->fd, 1, 1); + file->fd, 1, 1, 0, NULL); } out: @@ -454,12 +447,13 @@ out: int ra_readv_disabled_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iovec *vector, - int32_t count, struct iatt *stbuf, struct iobref *iobref) + int32_t count, struct iatt *stbuf, struct iobref *iobref, + dict_t *xdata) { GF_ASSERT (frame); STACK_UNWIND_STRICT (readv, frame, op_ret, op_errno, vector, count, - stbuf, iobref); + stbuf, iobref, xdata); return 0; } @@ -467,7 +461,7 @@ ra_readv_disabled_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int ra_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, - off_t offset) + off_t offset, uint32_t flags, dict_t *xdata) { ra_file_t *file = NULL; ra_local_t *local = NULL; @@ -489,12 +483,8 @@ ra_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, fd_ctx_get (fd, this, &tmp_file); file = (ra_file_t *)(long)tmp_file; - if (file == NULL) { - op_errno = EBADF; - gf_log (this->name, GF_LOG_WARNING, - "readv received on fd (%p) with no" - " file set in its context", fd); - goto unwind; + if (!file || file->disabled) { + goto disabled; } if (file->offset != offset) { @@ -508,7 +498,7 @@ ra_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, "expected offset (%"PRId64") when page_count=%d", offset, file->page_count); - if (file->expected < (conf->page_size * conf->page_count)) { + if (file->expected < (file->page_size * conf->page_count)) { file->expected += size; file->page_count = min ((file->expected / file->page_size), @@ -517,18 +507,10 @@ ra_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, } if (!expected_offset) { - flush_region (frame, file, 0, file->pages.prev->offset + 1); + flush_region (frame, file, 0, file->pages.prev->offset + 1, 0); } - if (file->disabled) { - STACK_WIND (frame, ra_readv_disabled_cbk, - FIRST_CHILD (frame->this), - FIRST_CHILD (frame->this)->fops->readv, - file->fd, size, offset); - return 0; - } - - local = (void *) GF_CALLOC (1, sizeof (*local), gf_ra_mt_ra_local_t); + local = mem_get0 (this->local_pool); if (!local) { op_errno = ENOMEM; goto unwind; @@ -548,7 +530,7 @@ ra_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, dispatch_requests (frame, file); - flush_region (frame, file, 0, floor (offset, file->page_size)); + flush_region (frame, file, 0, floor (offset, file->page_size), 0); read_ahead (frame, file); @@ -559,18 +541,26 @@ ra_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, return 0; unwind: - STACK_UNWIND_STRICT (readv, frame, -1, op_errno, NULL, 0, NULL, NULL); + STACK_UNWIND_STRICT (readv, frame, -1, op_errno, NULL, 0, NULL, NULL, + NULL); + + return 0; +disabled: + STACK_WIND (frame, ra_readv_disabled_cbk, + FIRST_CHILD (frame->this), + FIRST_CHILD (frame->this)->fops->readv, + fd, size, offset, flags, xdata); return 0; } int ra_flush_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, - int32_t op_errno) + int32_t op_errno, dict_t *xdata) { GF_ASSERT (frame); - STACK_UNWIND_STRICT (flush, frame, op_ret, op_errno); + STACK_UNWIND_STRICT (flush, frame, op_ret, op_errno, xdata); return 0; } @@ -578,16 +568,18 @@ ra_flush_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int ra_fsync_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, - int32_t op_errno, struct iatt *prebuf, struct iatt *postbuf) + int32_t op_errno, struct iatt *prebuf, struct iatt *postbuf, + dict_t *xdata) { GF_ASSERT (frame); - STACK_UNWIND_STRICT (fsync, frame, op_ret, op_errno, prebuf, postbuf); + STACK_UNWIND_STRICT (fsync, frame, op_ret, op_errno, prebuf, postbuf, + xdata); return 0; } int -ra_flush (call_frame_t *frame, xlator_t *this, fd_t *fd) +ra_flush (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata) { ra_file_t *file = NULL; uint64_t tmp_file = 0; @@ -600,28 +592,23 @@ ra_flush (call_frame_t *frame, xlator_t *this, fd_t *fd) fd_ctx_get (fd, this, &tmp_file); file = (ra_file_t *)(long)tmp_file; - if (file == NULL) { - op_errno = EBADF; - gf_log (this->name, GF_LOG_WARNING, - "flush received on fd (%p) with no" - " file set in its context", fd); - goto unwind; + if (file) { + flush_region (frame, file, 0, file->pages.prev->offset+1, 0); } - flush_region (frame, file, 0, file->pages.prev->offset+1); - STACK_WIND (frame, ra_flush_cbk, FIRST_CHILD (this), - FIRST_CHILD (this)->fops->flush, fd); + FIRST_CHILD (this)->fops->flush, fd, xdata); return 0; unwind: - STACK_UNWIND_STRICT (flush, frame, -1, op_errno); + STACK_UNWIND_STRICT (flush, frame, -1, op_errno, NULL); return 0; } int -ra_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t datasync) +ra_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t datasync, + dict_t *xdata) { ra_file_t *file = NULL; uint64_t tmp_file = 0; @@ -634,22 +621,16 @@ ra_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t datasync) fd_ctx_get (fd, this, &tmp_file); file = (ra_file_t *)(long)tmp_file; - if (file == NULL) { - op_errno = EBADF; - gf_log (this->name, GF_LOG_WARNING, - "fsync received on fd (%p) with no" - " file set in its context", fd); - goto unwind; + if (file) { + flush_region (frame, file, 0, file->pages.prev->offset+1, 0); } - flush_region (frame, file, 0, file->pages.prev->offset+1); - STACK_WIND (frame, ra_fsync_cbk, FIRST_CHILD (this), - FIRST_CHILD (this)->fops->fsync, fd, datasync); + FIRST_CHILD (this)->fops->fsync, fd, datasync, xdata); return 0; unwind: - STACK_UNWIND_STRICT (fsync, frame, -1, op_errno, NULL, NULL); + STACK_UNWIND_STRICT (fsync, frame, -1, op_errno, NULL, NULL, NULL); return 0; } @@ -657,39 +638,29 @@ unwind: int ra_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *prebuf, - struct iatt *postbuf) + struct iatt *postbuf, dict_t *xdata) { - fd_t *fd = NULL; ra_file_t *file = NULL; - uint64_t tmp_file = 0; GF_ASSERT (frame); - fd = frame->local; + file = frame->local; - fd_ctx_get (fd, this, &tmp_file); - file = (ra_file_t *)(long)tmp_file; - - if (file == NULL) { - gf_log (this->name, GF_LOG_WARNING, - "no read-ahead context set in fd (%p)", fd); - op_errno = EBADF; - op_ret = -1; - goto out; + if (file) { + flush_region (frame, file, 0, file->pages.prev->offset+1, 1); } - flush_region (frame, file, 0, file->pages.prev->offset+1); - -out: frame->local = NULL; - STACK_UNWIND_STRICT (writev, frame, op_ret, op_errno, prebuf, postbuf); + STACK_UNWIND_STRICT (writev, frame, op_ret, op_errno, prebuf, postbuf, + xdata); return 0; } int ra_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector, - int32_t count, off_t offset, struct iobref *iobref) + int32_t count, off_t offset, uint32_t flags, struct iobref *iobref, + dict_t *xdata) { ra_file_t *file = NULL; uint64_t tmp_file = 0; @@ -701,29 +672,22 @@ ra_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector, fd_ctx_get (fd, this, &tmp_file); file = (ra_file_t *)(long)tmp_file; - if (file == NULL) { - op_errno = EBADF; - gf_log (this->name, GF_LOG_WARNING, "writev received on fd with" - "no file set in its context"); - goto unwind; + if (file) { + flush_region (frame, file, 0, file->pages.prev->offset+1, 1); + frame->local = file; + /* reset the read-ahead counters too */ + file->expected = file->page_count = 0; } - flush_region (frame, file, 0, file->pages.prev->offset+1); - - /* reset the read-ahead counters too */ - file->expected = file->page_count = 0; - - frame->local = fd; - STACK_WIND (frame, ra_writev_cbk, FIRST_CHILD(this), FIRST_CHILD(this)->fops->writev, - fd, vector, count, offset, iobref); + fd, vector, count, offset, flags, iobref, xdata); return 0; unwind: - STACK_UNWIND_STRICT (writev, frame, -1, op_errno, NULL, NULL); + STACK_UNWIND_STRICT (writev, frame, -1, op_errno, NULL, NULL, NULL); return 0; } @@ -731,29 +695,30 @@ unwind: int ra_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *prebuf, - struct iatt *postbuf) + struct iatt *postbuf, dict_t *xdata) { GF_ASSERT (frame); STACK_UNWIND_STRICT (truncate, frame, op_ret, op_errno, prebuf, - postbuf); + postbuf, xdata); return 0; } int ra_attr_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, struct iatt *buf) + int32_t op_ret, int32_t op_errno, struct iatt *buf, dict_t *xdata) { GF_ASSERT (frame); - STACK_UNWIND_STRICT (stat, frame, op_ret, op_errno, buf); + STACK_UNWIND_STRICT (stat, frame, op_ret, op_errno, buf, xdata); return 0; } int -ra_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset) +ra_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset, + dict_t *xdata) { ra_file_t *file = NULL; fd_t *iter_fd = NULL; @@ -775,8 +740,16 @@ ra_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset) if (!file) continue; + /* + * Truncation invalidates reads just like writing does. + * TBD: this seems to flush more than it should. The + * only time we should flush at all is when we're + * shortening (not lengthening) the file, and then only + * from new EOF to old EOF. The same problem exists in + * ra_ftruncate. + */ flush_region (frame, file, 0, - file->pages.prev->offset + 1); + file->pages.prev->offset + 1, 1); } } UNLOCK (&inode->lock); @@ -784,11 +757,11 @@ ra_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset) STACK_WIND (frame, ra_truncate_cbk, FIRST_CHILD (this), FIRST_CHILD (this)->fops->truncate, - loc, offset); + loc, offset, xdata); return 0; unwind: - STACK_UNWIND_STRICT (truncate, frame, -1, op_errno, NULL, NULL); + STACK_UNWIND_STRICT (truncate, frame, -1, op_errno, NULL, NULL, NULL); return 0; } @@ -811,6 +784,8 @@ ra_page_dump (struct ra_page *page) gf_proc_dump_write ("dirty", "%s", page->dirty ? "yes" : "no"); + gf_proc_dump_write ("poisoned", "%s", page->poisoned ? "yes" : "no"); + gf_proc_dump_write ("ready", "%s", page->ready ? "yes" : "no"); for (trav = page->waitq; trav; trav = trav->next) { @@ -883,7 +858,7 @@ out: } int -ra_fstat (call_frame_t *frame, xlator_t *this, fd_t *fd) +ra_fstat (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata) { ra_file_t *file = NULL; fd_t *iter_fd = NULL; @@ -906,23 +881,24 @@ ra_fstat (call_frame_t *frame, xlator_t *this, fd_t *fd) if (!file) continue; flush_region (frame, file, 0, - file->pages.prev->offset + 1); + file->pages.prev->offset + 1, 0); } } UNLOCK (&inode->lock); STACK_WIND (frame, ra_attr_cbk, FIRST_CHILD (this), - FIRST_CHILD (this)->fops->fstat, fd); + FIRST_CHILD (this)->fops->fstat, fd, xdata); return 0; unwind: - STACK_UNWIND_STRICT (stat, frame, -1, op_errno, NULL); + STACK_UNWIND_STRICT (stat, frame, -1, op_errno, NULL, NULL); return 0; } int -ra_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset) +ra_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + dict_t *xdata) { ra_file_t *file = NULL; fd_t *iter_fd = NULL; @@ -943,21 +919,129 @@ ra_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset) file = (ra_file_t *)(long)tmp_file; if (!file) continue; + /* + * Truncation invalidates reads just like writing does. + * TBD: this seems to flush more than it should. The + * only time we should flush at all is when we're + * shortening (not lengthening) the file, and then only + * from new EOF to old EOF. The same problem exists in + * ra_truncate. + */ flush_region (frame, file, 0, - file->pages.prev->offset + 1); + file->pages.prev->offset + 1, 1); } } UNLOCK (&inode->lock); STACK_WIND (frame, ra_truncate_cbk, FIRST_CHILD (this), - FIRST_CHILD (this)->fops->ftruncate, fd, offset); + FIRST_CHILD (this)->fops->ftruncate, fd, offset, xdata); return 0; unwind: - STACK_UNWIND_STRICT (truncate, frame, -1, op_errno, NULL, NULL); + STACK_UNWIND_STRICT (truncate, frame, -1, op_errno, NULL, NULL, NULL); return 0; } +int +ra_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *prebuf, + struct iatt *postbuf, dict_t *xdata) +{ + GF_ASSERT (frame); + + STACK_UNWIND_STRICT (discard, frame, op_ret, op_errno, prebuf, + postbuf, xdata); + return 0; +} + +static int +ra_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + ra_file_t *file = NULL; + fd_t *iter_fd = NULL; + inode_t *inode = NULL; + uint64_t tmp_file = 0; + int32_t op_errno = EINVAL; + + GF_ASSERT (frame); + GF_VALIDATE_OR_GOTO (frame->this->name, this, unwind); + GF_VALIDATE_OR_GOTO (frame->this->name, fd, unwind); + + inode = fd->inode; + + LOCK (&inode->lock); + { + list_for_each_entry (iter_fd, &inode->fd_list, inode_list) { + fd_ctx_get (iter_fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + if (!file) + continue; + + flush_region(frame, file, offset, len, 1); + } + } + UNLOCK (&inode->lock); + + STACK_WIND (frame, ra_discard_cbk, FIRST_CHILD (this), + FIRST_CHILD (this)->fops->discard, fd, offset, len, xdata); + return 0; + +unwind: + STACK_UNWIND_STRICT (discard, frame, -1, op_errno, NULL, NULL, NULL); + return 0; +} + +int +ra_zerofill_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *prebuf, + struct iatt *postbuf, dict_t *xdata) +{ + GF_ASSERT (frame); + + STACK_UNWIND_STRICT (zerofill, frame, op_ret, op_errno, prebuf, + postbuf, xdata); + return 0; +} + +static int +ra_zerofill(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + ra_file_t *file = NULL; + fd_t *iter_fd = NULL; + inode_t *inode = NULL; + uint64_t tmp_file = 0; + int32_t op_errno = EINVAL; + + GF_ASSERT (frame); + GF_VALIDATE_OR_GOTO (frame->this->name, this, unwind); + GF_VALIDATE_OR_GOTO (frame->this->name, fd, unwind); + + inode = fd->inode; + + LOCK (&inode->lock); + { + list_for_each_entry (iter_fd, &inode->fd_list, inode_list) { + fd_ctx_get (iter_fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + if (!file) + continue; + + flush_region(frame, file, offset, len, 1); + } + } + UNLOCK (&inode->lock); + + STACK_WIND (frame, ra_zerofill_cbk, FIRST_CHILD (this), + FIRST_CHILD (this)->fops->zerofill, fd, + offset, len, xdata); + return 0; + +unwind: + STACK_UNWIND_STRICT (zerofill, frame, -1, op_errno, NULL, NULL, NULL); + return 0; +} int ra_priv_dump (xlator_t *this) @@ -965,6 +1049,7 @@ ra_priv_dump (xlator_t *this) ra_conf_t *conf = NULL; int ret = -1; char key_prefix[GF_DUMP_MAX_BUF_LEN] = {0, }; + gf_boolean_t add_section = _gf_false; if (!this) { goto out; @@ -976,26 +1061,32 @@ ra_priv_dump (xlator_t *this) goto out; } - ret = pthread_mutex_trylock (&conf->conf_lock); - if (ret) { - gf_log (this->name, GF_LOG_WARNING, "Unable to lock client %s " - "(%s)", this->name, strerror (ret)); - ret = -1; - goto out; - } - gf_proc_dump_build_key (key_prefix, "xlator.performance.read-ahead", "priv"); gf_proc_dump_add_section (key_prefix); - gf_proc_dump_write ("page_size", "%d", conf->page_size); - gf_proc_dump_write ("page_count", "%d", conf->page_count); - gf_proc_dump_write ("force_atime_update", "%d", conf->force_atime_update); + add_section = _gf_true; + ret = pthread_mutex_trylock (&conf->conf_lock); + if (ret) + goto out; + { + gf_proc_dump_write ("page_size", "%d", conf->page_size); + gf_proc_dump_write ("page_count", "%d", conf->page_count); + gf_proc_dump_write ("force_atime_update", "%d", + conf->force_atime_update); + } pthread_mutex_unlock (&conf->conf_lock); ret = 0; out: + if (ret && conf) { + if (add_section == _gf_false) + gf_proc_dump_add_section (key_prefix); + + gf_proc_dump_write ("Unable to dump priv", + "(Lock acquisition failed) %s", this->name); + } return ret; } @@ -1021,16 +1112,33 @@ out: } int +reconfigure (xlator_t *this, dict_t *options) +{ + ra_conf_t *conf = NULL; + int ret = -1; + + GF_VALIDATE_OR_GOTO ("read-ahead", this, out); + GF_VALIDATE_OR_GOTO ("read-ahead", this->private, out); + + conf = this->private; + + GF_OPTION_RECONF ("page-count", conf->page_count, options, uint32, out); + + GF_OPTION_RECONF ("page-size", conf->page_size, options, size, out); + + ret = 0; + out: + return ret; +} + +int init (xlator_t *this) { ra_conf_t *conf = NULL; - dict_t *options = NULL; - char *page_count_string = NULL; int32_t ret = -1; GF_VALIDATE_OR_GOTO ("read-ahead", this, out); - options = this->options; if (!this->children || this->children->next) { gf_log (this->name, GF_LOG_ERROR, "FATAL: read-ahead not configured with exactly one" @@ -1049,60 +1157,32 @@ init (xlator_t *this) } conf->page_size = this->ctx->page_size; - conf->page_count = 4; - - if (dict_get (options, "page-count")) { - page_count_string = data_to_str (dict_get (options, - "page-count")); - } - - if (page_count_string) { - if (gf_string2uint_base10 (page_count_string, &conf->page_count) - != 0) { - gf_log ("read-ahead", GF_LOG_ERROR, - "invalid number format \"%s\" of \"option " - "page-count\"", - page_count_string); - goto out; - } - gf_log (this->name, GF_LOG_WARNING, - "Using conf->page_count = %u", conf->page_count); - } + GF_OPTION_INIT ("page-size", conf->page_size, size, out); - if (dict_get (options, "force-atime-update")) { - char *force_atime_update_str = NULL; + GF_OPTION_INIT ("page-count", conf->page_count, uint32, out); - force_atime_update_str - = data_to_str (dict_get (options, - "force-atime-update")); - - if (gf_string2boolean (force_atime_update_str, - &conf->force_atime_update) == -1) { - gf_log (this->name, GF_LOG_ERROR, - "'force-atime-update' takes only boolean " - "options"); - goto out; - } - - if (conf->force_atime_update) { - gf_log (this->name, GF_LOG_WARNING, "Forcing atime " - "updates on cache hit"); - } - } + GF_OPTION_INIT ("force-atime-update", conf->force_atime_update, bool, out); conf->files.next = &conf->files; conf->files.prev = &conf->files; pthread_mutex_init (&conf->conf_lock, NULL); + + this->local_pool = mem_pool_new (ra_local_t, 64); + if (!this->local_pool) { + ret = -1; + gf_log (this->name, GF_LOG_ERROR, + "failed to create local_t's memory pool"); + goto out; + } + this->private = conf; ret = 0; out: if (ret == -1) { - if (conf != NULL) { - GF_FREE (conf); - } + GF_FREE (conf); } return ret; @@ -1121,11 +1201,14 @@ fini (xlator_t *this) goto out; } + this->private = NULL; + + GF_ASSERT ((conf->files.next == &conf->files) + && (conf->files.prev == &conf->files)); + pthread_mutex_destroy (&conf->conf_lock); GF_FREE (conf); - this->private = NULL; - out: return; } @@ -1140,6 +1223,8 @@ struct xlator_fops fops = { .truncate = ra_truncate, .ftruncate = ra_ftruncate, .fstat = ra_fstat, + .discard = ra_discard, + .zerofill = ra_zerofill, }; struct xlator_cbks cbks = { @@ -1153,12 +1238,22 @@ struct xlator_dumpops dumpops = { struct volume_options options[] = { { .key = {"force-atime-update"}, - .type = GF_OPTION_TYPE_BOOL + .type = GF_OPTION_TYPE_BOOL, + .default_value = "false" }, { .key = {"page-count"}, .type = GF_OPTION_TYPE_INT, .min = 1, - .max = 16 + .max = 16, + .default_value = "4", + .description = "Number of pages that will be pre-fetched" }, + { .key = {"page-size"}, + .type = GF_OPTION_TYPE_SIZET, + .min = 4096, + .max = 1048576 * 64, + .default_value = "131072", + .description = "Page size with which read-ahead performs server I/O" + }, { .key = {NULL} }, }; 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