From fb0bb972dfac3c255c53ddc7b588b73a08883288 Mon Sep 17 00:00:00 2001 From: Raghavendra G Date: Wed, 25 Aug 2010 01:40:00 +0000 Subject: storage/posix: calculate the correct size of each dirent in readdir/readdirp. - In addition to posix, protocol/server also adds a check to make sure that iobuf allocated to hold readdir/readdirp response can hold all the dentries, rpc and proc (readdir/readdirp) header. Signed-off-by: Raghavendra G Signed-off-by: Anand V. Avati BUG: 1430 (encoding of readdirp response fails occasionally) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1430 --- rpc/rpc-lib/src/rpcsvc.h | 1 + xlators/protocol/server/src/server3_1-fops.c | 38 ++++++++++++++++++++++------ xlators/storage/posix/src/Makefile.am | 8 +++--- xlators/storage/posix/src/posix.c | 5 +++- 4 files changed, 39 insertions(+), 13 deletions(-) diff --git a/rpc/rpc-lib/src/rpcsvc.h b/rpc/rpc-lib/src/rpcsvc.h index 06b0aad222e..10b20af0a88 100644 --- a/rpc/rpc-lib/src/rpcsvc.h +++ b/rpc/rpc-lib/src/rpcsvc.h @@ -39,6 +39,7 @@ #include #include #include +#include #include "compat.h" #ifndef NGRPS diff --git a/xlators/protocol/server/src/server3_1-fops.c b/xlators/protocol/server/src/server3_1-fops.c index 69f37d6b370..c73f3df15be 100644 --- a/xlators/protocol/server/src/server3_1-fops.c +++ b/xlators/protocol/server/src/server3_1-fops.c @@ -3868,9 +3868,10 @@ out: int server_readdirp (rpcsvc_request_t *req) { - server_state_t *state = NULL; - call_frame_t *frame = NULL; - gfs3_readdirp_req args = {0,}; + server_state_t *state = NULL; + call_frame_t *frame = NULL; + gfs3_readdirp_req args = {0,}; + size_t headers_size = 0; if (!req) return 0; @@ -3896,9 +3897,19 @@ server_readdirp (rpcsvc_request_t *req) goto out; } + /* FIXME: this should go away when variable sized iobufs are introduced + * and transport layer can send msgs bigger than current page-size. + */ + headers_size = sizeof (struct rpc_msg) + sizeof (gfs3_readdir_rsp); + if ((frame->this->ctx->page_size < args.size) + || ((frame->this->ctx->page_size - args.size) < headers_size)) { + state->size = frame->this->ctx->page_size - headers_size; + } else { + state->size = args.size; + } + state->resolve.type = RESOLVE_MUST; state->resolve.fd_no = args.fd; - state->size = args.size; state->offset = args.offset; resolve_and_resume (frame, server_readdirp_resume); @@ -3909,9 +3920,10 @@ out: int server_readdir (rpcsvc_request_t *req) { - server_state_t *state = NULL; - call_frame_t *frame = NULL; - gfs3_readdir_req args = {0,}; + server_state_t *state = NULL; + call_frame_t *frame = NULL; + gfs3_readdir_req args = {0,}; + size_t headers_size = 0; if (!req) return 0; @@ -3937,9 +3949,19 @@ server_readdir (rpcsvc_request_t *req) goto out; } + /* FIXME: this should go away when variable sized iobufs are introduced + * and transport layer can send msgs bigger than current page-size. + */ + headers_size = sizeof (struct rpc_msg) + sizeof (gfs3_readdir_rsp); + if ((frame->this->ctx->page_size < args.size) + || ((frame->this->ctx->page_size - args.size) < headers_size)) { + state->size = frame->this->ctx->page_size - headers_size; + } else { + state->size = args.size; + } + state->resolve.type = RESOLVE_MUST; state->resolve.fd_no = args.fd; - state->size = args.size; state->offset = args.offset; resolve_and_resume (frame, server_readdir_resume); diff --git a/xlators/storage/posix/src/Makefile.am b/xlators/storage/posix/src/Makefile.am index 0fdcfdcecb4..b8d1668aee9 100644 --- a/xlators/storage/posix/src/Makefile.am +++ b/xlators/storage/posix/src/Makefile.am @@ -9,10 +9,10 @@ posix_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la noinst_HEADERS = posix.h posix-mem-types.h -AM_CFLAGS = -fPIC -fno-strict-aliasing -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -D$(GF_HOST_OS) -Wall \ - -I$(top_srcdir)/libglusterfs/src -shared -nostartfiles \ - -I$(top_srcdir)/contrib/md5 \ - $(GF_CFLAGS) +AM_CFLAGS = -fPIC -fno-strict-aliasing -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE \ + -D$(GF_HOST_OS) -Wall -I$(top_srcdir)/libglusterfs/src -shared \ + -nostartfiles -I$(top_srcdir)/contrib/md5 -I$(top_srcdir)/rpc/xdr/src \ + -I$(top_srcdir)/rpc/rpc-lib/src $(GF_CFLAGS) CLEANFILES = diff --git a/xlators/storage/posix/src/posix.c b/xlators/storage/posix/src/posix.c index 1fd369b8ffe..c75429b0eb5 100644 --- a/xlators/storage/posix/src/posix.c +++ b/xlators/storage/posix/src/posix.c @@ -52,6 +52,7 @@ #include "statedump.h" #include "locking.h" #include "timer.h" +#include "glusterfs3-xdr.h" #undef HAVE_SET_FSID #ifdef HAVE_SET_FSID @@ -4016,7 +4017,9 @@ posix_do_readdir (call_frame_t *frame, xlator_t *this, && (!strcmp(entry->d_name, GF_REPLICATE_TRASH_DIR))) continue; - this_size = dirent_size (entry); + this_size = max (sizeof (gf_dirent_t), + sizeof (gfs3_dirplist)) + + strlen (entry->d_name) + 1; if (this_size + filled > size) { seekdir (dir, in_case); -- cgit