diff options
37 files changed, 1526 insertions, 40 deletions
diff --git a/api/examples/gfapi.py b/api/examples/gfapi.py index 8dfe2791d..8d9ed7329 100755 --- a/api/examples/gfapi.py +++ b/api/examples/gfapi.py @@ -100,6 +100,8 @@ class File(object): def fallocate (self, mode, offset, len): return api.glfs_fallocate(self.fd, mode, offset, len) + def discard (self, offset, len): + return api.glfs_discard(self.fd, offset, len) class Dir(object): @@ -357,10 +359,13 @@ if __name__ == "__main__": fd = vol.creat(mypath,os.O_WRONLY|os.O_EXCL,0644) if not fd: return False, "creat error" - rc = fd.fallocate(0, 0, 1024) + rc = fd.fallocate(0, 0, 1024*1024) if rc != 0: return False, "fallocate error" - return True, "fallocate worked" + rc = fd.discard(4096, 4096) + if rc != 0: + return False, "discard error" + return True, "fallocate/discard worked" test_list = ( test_create_write, diff --git a/api/src/glfs-fops.c b/api/src/glfs-fops.c index 4bc0bb1b6..fbc9f4b49 100644 --- a/api/src/glfs-fops.c +++ b/api/src/glfs-fops.c @@ -2666,6 +2666,40 @@ out: int +glfs_discard (struct glfs_fd *glfd, off_t offset, size_t len) +{ + int ret = -1; + xlator_t *subvol = NULL; + fd_t *fd = NULL; + + __glfs_entry_fd (glfd); + + subvol = glfs_active_subvol (glfd->fs); + if (!subvol) { + ret = -1; + errno = EIO; + goto out; + } + + fd = glfs_resolve_fd (glfd->fs, subvol, glfd); + if (!fd) { + ret = -1; + errno = EBADFD; + goto out; + } + + ret = syncop_discard (subvol, fd, offset, len); +out: + if (fd) + fd_unref(fd); + + glfs_subvol_done (glfd->fs, subvol); + + return ret; +} + + +int glfs_chdir (struct glfs *fs, const char *path) { int ret = -1; diff --git a/api/src/glfs.h b/api/src/glfs.h index 3888a103e..700e10f17 100644 --- a/api/src/glfs.h +++ b/api/src/glfs.h @@ -450,6 +450,8 @@ int glfs_fremovexattr (glfs_fd_t *fd, const char *name); int glfs_fallocate(glfs_fd_t *fd, int keep_size, off_t offset, size_t len); +int glfs_discard(glfs_fd_t *fd, off_t offset, size_t len); + char *glfs_getcwd (glfs_t *fs, char *buf, size_t size); int glfs_chdir (glfs_t *fs, const char *path); diff --git a/libglusterfs/src/call-stub.c b/libglusterfs/src/call-stub.c index 2bb993411..2f07a0074 100644 --- a/libglusterfs/src/call-stub.c +++ b/libglusterfs/src/call-stub.c @@ -2186,6 +2186,61 @@ out: } +call_stub_t * +fop_discard_cbk_stub(call_frame_t *frame, fop_discard_cbk_t fn, + int32_t op_ret, int32_t op_errno, + struct iatt *statpre, struct iatt *statpost, + dict_t *xdata) +{ + call_stub_t *stub = NULL; + + GF_VALIDATE_OR_GOTO ("call-stub", frame, out); + + stub = stub_new (frame, 0, GF_FOP_DISCARD); + GF_VALIDATE_OR_GOTO ("call-stub", stub, out); + + stub->fn_cbk.discard = fn; + + stub->args_cbk.op_ret = op_ret; + stub->args_cbk.op_errno = op_errno; + + if (statpre) + stub->args_cbk.prestat = *statpre; + if (statpost) + stub->args_cbk.poststat = *statpost; + if (xdata) + stub->args_cbk.xdata = dict_ref (xdata); +out: + return stub; +} + +call_stub_t * +fop_discard_stub(call_frame_t *frame, fop_discard_t fn, fd_t *fd, + off_t offset, size_t len, dict_t *xdata) +{ + call_stub_t *stub = NULL; + + GF_VALIDATE_OR_GOTO ("call-stub", frame, out); + GF_VALIDATE_OR_GOTO ("call-stub", fn, out); + + stub = stub_new (frame, 1, GF_FOP_DISCARD); + GF_VALIDATE_OR_GOTO ("call-stub", stub, out); + + stub->fn.discard = fn; + + if (fd) + stub->args.fd = fd_ref (fd); + + stub->args.offset = offset; + stub->args.size = len; + + if (xdata) + stub->args.xdata = dict_ref (xdata); +out: + return stub; + +} + static void call_resume_wind (call_stub_t *stub) { @@ -2408,6 +2463,11 @@ call_resume_wind (call_stub_t *stub) stub->args.offset, stub->args.size, stub->args.xdata); break; + case GF_FOP_DISCARD: + stub->fn.discard(stub->frame, stub->frame->this, + stub->args.fd, stub->args.offset, + stub->args.size, stub->args.xdata); + break; default: gf_log_callingfn ("call-stub", GF_LOG_ERROR, "Invalid value of FOP (%d)", @@ -2606,6 +2666,10 @@ call_resume_unwind (call_stub_t *stub) STUB_UNWIND(stub, fallocate, &stub->args_cbk.prestat, &stub->args_cbk.poststat, stub->args_cbk.xdata); break; + case GF_FOP_DISCARD: + STUB_UNWIND(stub, discard, &stub->args_cbk.prestat, + &stub->args_cbk.poststat, stub->args_cbk.xdata); + break; default: gf_log_callingfn ("call-stub", GF_LOG_ERROR, "Invalid value of FOP (%d)", diff --git a/libglusterfs/src/call-stub.h b/libglusterfs/src/call-stub.h index d940fe6f1..f0872b121 100644 --- a/libglusterfs/src/call-stub.h +++ b/libglusterfs/src/call-stub.h @@ -70,6 +70,7 @@ typedef struct { fop_setattr_t setattr; fop_fsetattr_t fsetattr; fop_fallocate_t fallocate; + fop_discard_t discard; } fn; union { @@ -115,6 +116,7 @@ typedef struct { fop_setattr_cbk_t setattr; fop_fsetattr_cbk_t fsetattr; fop_fallocate_cbk_t fallocate; + fop_discard_cbk_t discard; } fn_cbk; struct { @@ -729,6 +731,20 @@ fop_fallocate_cbk_stub(call_frame_t *frame, struct iatt *statpre, struct iatt *statpost, dict_t *xdata); +call_stub_t * +fop_discard_stub(call_frame_t *frame, + fop_discard_t fn, + fd_t *fd, + off_t offset, + size_t len, dict_t *xdata); + +call_stub_t * +fop_discard_cbk_stub(call_frame_t *frame, + fop_discard_cbk_t fn, + int32_t op_ret, int32_t op_errno, + struct iatt *statpre, struct iatt *statpost, + dict_t *xdata); + void call_resume (call_stub_t *stub); void call_stub_destroy (call_stub_t *stub); void call_unwind_error (call_stub_t *stub, int op_ret, int op_errno); diff --git a/libglusterfs/src/defaults.c b/libglusterfs/src/defaults.c index 32454a1e9..a3c8d97f1 100644 --- a/libglusterfs/src/defaults.c +++ b/libglusterfs/src/defaults.c @@ -464,6 +464,15 @@ default_fallocate_cbk(call_frame_t *frame, void *cookie, xlator_t *this, } int32_t +default_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *pre, + struct iatt *post, dict_t *xdata) +{ + STACK_UNWIND_STRICT(discard, frame, op_ret, op_errno, pre, post, xdata); + return 0; +} + +int32_t default_getspec_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, char *spec_data) { @@ -881,6 +890,15 @@ default_fallocate_resume(call_frame_t *frame, xlator_t *this, fd_t *fd, return 0; } +int32_t +default_discard_resume(call_frame_t *frame, xlator_t *this, fd_t *fd, + off_t offset, size_t len, dict_t *xdata) +{ + STACK_WIND(frame, default_discard_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->discard, fd, offset, len, + xdata); + return 0; +} /* FOPS */ @@ -1297,6 +1315,16 @@ default_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, } int32_t +default_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, + off_t offset, size_t len, dict_t *xdata) +{ + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->discard, fd, offset, len, + xdata); + return 0; +} + +int32_t default_forget (xlator_t *this, inode_t *inode) { gf_log_callingfn (this->name, GF_LOG_WARNING, "xlator does not " diff --git a/libglusterfs/src/defaults.h b/libglusterfs/src/defaults.h index bc2f6429b..f3cbb3a4b 100644 --- a/libglusterfs/src/defaults.h +++ b/libglusterfs/src/defaults.h @@ -249,6 +249,12 @@ int32_t default_fallocate(call_frame_t *frame, int32_t keep_size, off_t offset, size_t len, dict_t *xdata); +int32_t default_discard(call_frame_t *frame, + xlator_t *this, + fd_t *fd, + off_t offset, + size_t len, dict_t *xdata); + /* Resume */ int32_t default_getspec_resume (call_frame_t *frame, xlator_t *this, @@ -465,6 +471,11 @@ int32_t default_fallocate_resume(call_frame_t *frame, int32_t keep_size, off_t offset, size_t len, dict_t *xdata); +int32_t default_discard_resume(call_frame_t *frame, + xlator_t *this, + fd_t *fd, + off_t offset, + size_t len, dict_t *xdata); /* _cbk */ @@ -680,6 +691,9 @@ int32_t default_fallocate_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct iatt *pre, struct iatt *post, dict_t *xdata); +int32_t default_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *pre, + struct iatt *post, dict_t *xdata); int32_t default_getspec_cbk (call_frame_t *frame, void *cookie, xlator_t *this, diff --git a/libglusterfs/src/globals.c b/libglusterfs/src/globals.c index ba5075b2e..072b1d523 100644 --- a/libglusterfs/src/globals.c +++ b/libglusterfs/src/globals.c @@ -68,6 +68,7 @@ const char *gf_fop_list[GF_FOP_MAXVALUE] = { [GF_FOP_RELEASEDIR] = "RELEASEDIR", [GF_FOP_FREMOVEXATTR]= "FREMOVEXATTR", [GF_FOP_FALLOCATE] = "FALLOCATE", + [GF_FOP_DISCARD] = "DISCARD", }; /* THIS */ diff --git a/libglusterfs/src/glusterfs.h b/libglusterfs/src/glusterfs.h index 013cdfffa..c2fbf5ac4 100644 --- a/libglusterfs/src/glusterfs.h +++ b/libglusterfs/src/glusterfs.h @@ -198,6 +198,7 @@ typedef enum { GF_FOP_GETSPEC, GF_FOP_FREMOVEXATTR, GF_FOP_FALLOCATE, + GF_FOP_DISCARD, GF_FOP_MAXVALUE, } glusterfs_fop_t; diff --git a/libglusterfs/src/syncop.c b/libglusterfs/src/syncop.c index f57e8da5a..9cceaf55c 100644 --- a/libglusterfs/src/syncop.c +++ b/libglusterfs/src/syncop.c @@ -1948,6 +1948,36 @@ syncop_fallocate(xlator_t *subvol, fd_t *fd, int32_t keep_size, off_t offset, int +syncop_discard_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, struct iatt *prebuf, + struct iatt *postbuf, dict_t *xdata) +{ + struct syncargs *args = NULL; + + args = cookie; + + args->op_ret = op_ret; + args->op_errno = op_errno; + + __wake (args); + + return 0; +} + +int +syncop_discard(xlator_t *subvol, fd_t *fd, off_t offset, size_t len) +{ + struct syncargs args = {0, }; + + SYNCOP (subvol, (&args), syncop_discard_cbk, subvol->fops->discard, + fd, offset, len, NULL); + + errno = args.op_errno; + return args.op_ret; +} + + +int syncop_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, struct gf_flock *flock, dict_t *xdata) diff --git a/libglusterfs/src/syncop.h b/libglusterfs/src/syncop.h index 59e62ad14..43e71c4f6 100644 --- a/libglusterfs/src/syncop.h +++ b/libglusterfs/src/syncop.h @@ -335,6 +335,7 @@ int syncop_fsyncdir (xlator_t *subvol, fd_t *fd, int datasync); int syncop_access (xlator_t *subvol, loc_t *loc, int32_t mask); int syncop_fallocate(xlator_t *subvol, fd_t *fd, int32_t keep_size, off_t offset, size_t len); +int syncop_discard(xlator_t *subvol, fd_t *fd, off_t offset, size_t len); int syncop_rename (xlator_t *subvol, loc_t *oldloc, loc_t *newloc); diff --git a/libglusterfs/src/xlator.c b/libglusterfs/src/xlator.c index 1926240e8..b1c090c1e 100644 --- a/libglusterfs/src/xlator.c +++ b/libglusterfs/src/xlator.c @@ -80,6 +80,7 @@ fill_defaults (xlator_t *xl) SET_DEFAULT_FOP (setattr); SET_DEFAULT_FOP (fsetattr); SET_DEFAULT_FOP (fallocate); + SET_DEFAULT_FOP (discard); SET_DEFAULT_FOP (getspec); diff --git a/libglusterfs/src/xlator.h b/libglusterfs/src/xlator.h index ace73f2ed..817eaddec 100644 --- a/libglusterfs/src/xlator.h +++ b/libglusterfs/src/xlator.h @@ -425,6 +425,14 @@ typedef int32_t (*fop_fallocate_cbk_t) (call_frame_t *frame, struct iatt *preop_stbuf, struct iatt *postop_stbuf, dict_t *xdata); +typedef int32_t (*fop_discard_cbk_t) (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct iatt *preop_stbuf, + struct iatt *postop_stbuf, dict_t *xdata); + typedef int32_t (*fop_lookup_t) (call_frame_t *frame, xlator_t *this, loc_t *loc, @@ -650,6 +658,13 @@ typedef int32_t (*fop_fallocate_t) (call_frame_t *frame, size_t len, dict_t *xdata); +typedef int32_t (*fop_discard_t) (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + off_t offset, + size_t len, + dict_t *xdata); + struct xlator_fops { fop_lookup_t lookup; fop_stat_t stat; @@ -694,6 +709,7 @@ struct xlator_fops { fop_fsetattr_t fsetattr; fop_getspec_t getspec; fop_fallocate_t fallocate; + fop_discard_t discard; /* these entries are used for a typechecking hack in STACK_WIND _only_ */ fop_lookup_cbk_t lookup_cbk; @@ -739,6 +755,7 @@ struct xlator_fops { fop_fsetattr_cbk_t fsetattr_cbk; fop_getspec_cbk_t getspec_cbk; fop_fallocate_cbk_t fallocate_cbk; + fop_discard_cbk_t discard_cbk; }; typedef int32_t (*cbk_forget_t) (xlator_t *this, diff --git a/rpc/rpc-lib/src/protocol-common.h b/rpc/rpc-lib/src/protocol-common.h index 214e84009..0457140dd 100644 --- a/rpc/rpc-lib/src/protocol-common.h +++ b/rpc/rpc-lib/src/protocol-common.h @@ -54,6 +54,7 @@ enum gf_fop_procnum { GFS3_OP_FSETATTR, GFS3_OP_READDIRP, GFS3_OP_FALLOCATE, + GFS3_OP_DISCARD, GFS3_OP_RELEASE, GFS3_OP_RELEASEDIR, GFS3_OP_FREMOVEXATTR, diff --git a/rpc/xdr/src/glusterfs3-xdr.c b/rpc/xdr/src/glusterfs3-xdr.c index 2ce0b84ed..4e9791b20 100644 --- a/rpc/xdr/src/glusterfs3-xdr.c +++ b/rpc/xdr/src/glusterfs3-xdr.c @@ -1547,6 +1547,44 @@ xdr_gfs3_fallocate_rsp (XDR *xdrs, gfs3_fallocate_rsp *objp) } bool_t +xdr_gfs3_discard_req (XDR *xdrs, gfs3_discard_req *objp) +{ + register int32_t *buf; + buf = NULL; + + if (!xdr_opaque (xdrs, objp->gfid, 16)) + return FALSE; + if (!xdr_quad_t (xdrs, &objp->fd)) + return FALSE; + if (!xdr_u_quad_t (xdrs, &objp->offset)) + return FALSE; + if (!xdr_u_quad_t (xdrs, &objp->size)) + return FALSE; + if (!xdr_bytes (xdrs, (char **)&objp->xdata.xdata_val, (u_int *) &objp->xdata.xdata_len, ~0)) + return FALSE; + return TRUE; +} + +bool_t +xdr_gfs3_discard_rsp (XDR *xdrs, gfs3_discard_rsp *objp) +{ + register int32_t *buf; + buf = NULL; + + if (!xdr_int (xdrs, &objp->op_ret)) + return FALSE; + if (!xdr_int (xdrs, &objp->op_errno)) + return FALSE; + if (!xdr_gf_iatt (xdrs, &objp->statpre)) + return FALSE; + if (!xdr_gf_iatt (xdrs, &objp->statpost)) + return FALSE; + if (!xdr_bytes (xdrs, (char **)&objp->xdata.xdata_val, (u_int *) &objp->xdata.xdata_len, ~0)) + return FALSE; + return TRUE; +} + +bool_t xdr_gfs3_rchecksum_req (XDR *xdrs, gfs3_rchecksum_req *objp) { register int32_t *buf; diff --git a/rpc/xdr/src/glusterfs3-xdr.h b/rpc/xdr/src/glusterfs3-xdr.h index 2f9ba4b45..9e5d2e67b 100644 --- a/rpc/xdr/src/glusterfs3-xdr.h +++ b/rpc/xdr/src/glusterfs3-xdr.h @@ -912,6 +912,30 @@ struct gfs3_fallocate_rsp { }; typedef struct gfs3_fallocate_rsp gfs3_fallocate_rsp; +struct gfs3_discard_req { + char gfid[16]; + quad_t fd; + u_quad_t offset; + u_quad_t size; + struct { + u_int xdata_len; + char *xdata_val; + } xdata; +}; +typedef struct gfs3_discard_req gfs3_discard_req; + +struct gfs3_discard_rsp { + int op_ret; + int op_errno; + struct gf_iatt statpre; + struct gf_iatt statpost; + struct { + u_int xdata_len; + char *xdata_val; + } xdata; +}; +typedef struct gfs3_discard_rsp gfs3_discard_rsp; + struct gfs3_rchecksum_req { quad_t fd; u_quad_t offset; @@ -1209,6 +1233,8 @@ extern bool_t xdr_gfs3_fsetattr_req (XDR *, gfs3_fsetattr_req*); extern bool_t xdr_gfs3_fsetattr_rsp (XDR *, gfs3_fsetattr_rsp*); extern bool_t xdr_gfs3_fallocate_req (XDR *, gfs3_fallocate_req*); extern bool_t xdr_gfs3_fallocate_rsp (XDR *, gfs3_fallocate_rsp*); +extern bool_t xdr_gfs3_discard_req (XDR *, gfs3_discard_req*); +extern bool_t xdr_gfs3_discard_rsp (XDR *, gfs3_discard_rsp*); extern bool_t xdr_gfs3_rchecksum_req (XDR *, gfs3_rchecksum_req*); extern bool_t xdr_gfs3_rchecksum_rsp (XDR *, gfs3_rchecksum_rsp*); extern bool_t xdr_gf_setvolume_req (XDR *, gf_setvolume_req*); @@ -1305,6 +1331,8 @@ extern bool_t xdr_gfs3_fsetattr_req (); extern bool_t xdr_gfs3_fsetattr_rsp (); extern bool_t xdr_gfs3_fallocate_req (); extern bool_t xdr_gfs3_fallocate_rsp (); +extern bool_t xdr_gfs3_discard_req (); +extern bool_t xdr_gfs3_discard_rsp (); extern bool_t xdr_gfs3_rchecksum_req (); extern bool_t xdr_gfs3_rchecksum_rsp (); extern bool_t xdr_gf_setvolume_req (); diff --git a/rpc/xdr/src/glusterfs3-xdr.x b/rpc/xdr/src/glusterfs3-xdr.x index 7fad58336..e2b086b1d 100644 --- a/rpc/xdr/src/glusterfs3-xdr.x +++ b/rpc/xdr/src/glusterfs3-xdr.x @@ -583,6 +583,22 @@ struct gfs3_fstat_req { opaque xdata<>; /* Extra data */ } ; + struct gfs3_discard_req { + opaque gfid[16]; + hyper fd; + unsigned hyper offset; + unsigned hyper size; + opaque xdata<>; /* Extra data */ +} ; + + struct gfs3_discard_rsp { + int op_ret; + int op_errno; + struct gf_iatt statpre; + struct gf_iatt statpost; + opaque xdata<>; /* Extra data */ +} ; + struct gfs3_rchecksum_req { hyper fd; unsigned hyper offset; diff --git a/tests/bugs/bug-963678.t b/tests/bugs/bug-963678.t new file mode 100644 index 000000000..14d566579 --- /dev/null +++ b/tests/bugs/bug-963678.t @@ -0,0 +1,56 @@ +#!/bin/bash +# +# Bug 963678 - Test discard functionality +# +# Test that basic discard (hole punch) functionality works via the fallocate +# command line tool. Hole punch deallocates a region of a file, creating a hole +# and a zero-filled data region. We verify that hole punch works, frees blocks +# and that subsequent reads do not read stale data (caches are invalidated). +# +# NOTE: fuse fallocate is known to be broken with regard to cache invalidation +# up to 3.9.0 kernels. Therefore, FOPEN_KEEP_CACHE is not used in this +# test (opens will invalidate the fuse cache). +### + +. $(dirname $0)/../include.rc +. $(dirname $0)/../fallocate.rc + +cleanup; + +TEST glusterd + +TEST $CLI volume create $V0 replica 2 $H0:$B0/${V0}{1,2} +TEST $CLI volume start $V0 + +TEST glusterfs --volfile-id=$V0 --volfile-server=$H0 $M0 --attribute-timeout=0 --entry-timeout=0 + +# check for fallocate and hole punch support +require_fallocate -l 1m $M0/file +require_fallocate -p -l 512k $M0/file && rm -f $M0/file + +# allocate some blocks, punch a hole and verify block allocation +TEST fallocate -l 1m $M0/file +blksz=`stat --printf=%B $M0/file` +nblks=`stat --printf=%b $M0/file` +TEST [ $(($blksz * $nblks)) -ge 1048576 ] +TEST fallocate -p -o 512k -l 128k $M0/file + +nblks=`stat --printf=%b $M0/file` +# allow some room for xattr blocks +TEST [ $(($blksz * $nblks)) -lt $((917504 + 16384)) ] +TEST unlink $M0/file + +# write some data, punch a hole and verify the file content changes +TEST dd if=/dev/urandom of=$M0/file bs=1M count=1 +TEST cp $M0/file $M0/file.copy.pre +TEST fallocate -p -o 512k -l 128k $M0/file +TEST cp $M0/file $M0/file.copy.post +TEST ! cmp $M0/file.copy.pre $M0/file.copy.post +TEST unlink $M0/file + +TEST umount $M0 + +TEST $CLI volume stop $V0 +TEST $CLI volume delete $V0 + +cleanup; diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c index 830ecd993..20513d380 100644 --- a/xlators/cluster/afr/src/afr-common.c +++ b/xlators/cluster/afr/src/afr-common.c @@ -3065,6 +3065,247 @@ out: /* }}} */ +/* {{{ discard */ + +static int +afr_discard_unwind (call_frame_t *frame, xlator_t *this) +{ + afr_local_t * local = NULL; + call_frame_t *main_frame = NULL; + + local = frame->local; + + LOCK (&frame->lock); + { + if (local->transaction.main_frame) + main_frame = local->transaction.main_frame; + local->transaction.main_frame = NULL; + } + UNLOCK (&frame->lock); + + if (main_frame) { + AFR_STACK_UNWIND (discard, main_frame, local->op_ret, + local->op_errno, + &local->cont.discard.prebuf, + &local->cont.discard.postbuf, + NULL); + } + return 0; +} + +static int +afr_discard_wind_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) +{ + afr_local_t * local = NULL; + afr_private_t * priv = NULL; + int child_index = (long) cookie; + int call_count = -1; + int need_unwind = 0; + int read_child = 0; + + local = frame->local; + priv = this->private; + + read_child = afr_inode_get_read_ctx (this, local->fd->inode, NULL); + + LOCK (&frame->lock); + { + if (child_index == read_child) { + local->read_child_returned = _gf_true; + } + + if (afr_fop_failed (op_ret, op_errno)) + afr_transaction_fop_failed (frame, this, child_index); + + if (op_ret != -1) { + if (local->success_count == 0) { + local->op_ret = op_ret; + local->cont.discard.prebuf = *prebuf; + local->cont.discard.postbuf = *postbuf; + } + + if (child_index == read_child) { + local->cont.discard.prebuf = *prebuf; + local->cont.discard.postbuf = *postbuf; + } + + local->success_count++; + + if ((local->success_count >= priv->wait_count) + && local->read_child_returned) { + need_unwind = 1; + } + } + local->op_errno = op_errno; + } + UNLOCK (&frame->lock); + + if (need_unwind) + local->transaction.unwind (frame, this); + + call_count = afr_frame_return (frame); + + if (call_count == 0) { + local->transaction.resume (frame, this); + } + + return 0; +} + +static int +afr_discard_wind (call_frame_t *frame, xlator_t *this) +{ + afr_local_t *local = NULL; + afr_private_t *priv = NULL; + int call_count = -1; + int i = 0; + + local = frame->local; + priv = this->private; + + call_count = afr_pre_op_done_children_count (local->transaction.pre_op, + priv->child_count); + + if (call_count == 0) { + local->transaction.resume (frame, this); + return 0; + } + + local->call_count = call_count; + + for (i = 0; i < priv->child_count; i++) { + if (local->transaction.pre_op[i]) { + STACK_WIND_COOKIE (frame, afr_discard_wind_cbk, + (void *) (long) i, + priv->children[i], + priv->children[i]->fops->discard, + local->fd, + local->cont.discard.offset, + local->cont.discard.len, + NULL); + + if (!--call_count) + break; + } + } + + return 0; +} + +static int +afr_discard_done (call_frame_t *frame, xlator_t *this) +{ + afr_local_t *local = NULL; + + local = frame->local; + + local->transaction.unwind (frame, this); + + AFR_STACK_DESTROY (frame); + + return 0; +} + +static int +afr_do_discard(call_frame_t *frame, xlator_t *this) +{ + call_frame_t * transaction_frame = NULL; + afr_local_t * local = NULL; + int op_ret = -1; + int op_errno = 0; + + local = frame->local; + + transaction_frame = copy_frame (frame); + if (!transaction_frame) { + goto out; + } + + transaction_frame->local = local; + frame->local = NULL; + + local->op = GF_FOP_DISCARD; + + local->transaction.fop = afr_discard_wind; + local->transaction.done = afr_discard_done; + local->transaction.unwind = afr_discard_unwind; + + local->transaction.main_frame = frame; + + local->transaction.start = local->cont.discard.offset; + local->transaction.len = 0; + + op_ret = afr_transaction (transaction_frame, this, AFR_DATA_TRANSACTION); + if (op_ret < 0) { + op_errno = -op_ret; + goto out; + } + + op_ret = 0; +out: + if (op_ret < 0) { + if (transaction_frame) + AFR_STACK_DESTROY (transaction_frame); + AFR_STACK_UNWIND (discard, frame, op_ret, op_errno, NULL, + NULL, NULL); + } + + return 0; +} + +int +afr_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + afr_private_t * priv = NULL; + afr_local_t * local = NULL; + call_frame_t *transaction_frame = NULL; + int ret = -1; + int op_errno = 0; + + VALIDATE_OR_GOTO (frame, out); + VALIDATE_OR_GOTO (this, out); + VALIDATE_OR_GOTO (this->private, out); + + priv = this->private; + + if (afr_is_split_brain (this, fd->inode)) { + op_errno = EIO; + goto out; + } + QUORUM_CHECK(discard, out); + + AFR_LOCAL_ALLOC_OR_GOTO (frame->local, out); + local = frame->local; + + ret = afr_local_init (local, priv, &op_errno); + if (ret < 0) + goto out; + + local->cont.discard.offset = offset; + local->cont.discard.len = len; + + local->fd = fd_ref (fd); + + afr_open_fd_fix (fd, this); + + afr_do_discard(frame, this); + + ret = 0; +out: + if (ret < 0) { + if (transaction_frame) + AFR_STACK_DESTROY (transaction_frame); + AFR_STACK_UNWIND (discard, frame, -1, op_errno, NULL, NULL, NULL); + } + + return 0; +} + +/* }}} */ + /* {{{ fsync */ int32_t diff --git a/xlators/cluster/afr/src/afr.c b/xlators/cluster/afr/src/afr.c index 4d6c71480..6fabc0017 100644 --- a/xlators/cluster/afr/src/afr.c +++ b/xlators/cluster/afr/src/afr.c @@ -484,6 +484,7 @@ struct xlator_fops fops = { .entrylk = afr_entrylk, .fentrylk = afr_fentrylk, .fallocate = afr_fallocate, + .discard = afr_discard, /* inode read */ .access = afr_access, diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h index 185f4f713..ced4e6fab 100644 --- a/xlators/cluster/afr/src/afr.h +++ b/xlators/cluster/afr/src/afr.h @@ -660,6 +660,14 @@ typedef struct _afr_local { struct iatt prebuf; struct iatt postbuf; } fallocate; + + struct { + off_t offset; + size_t len; + struct iatt prebuf; + struct iatt postbuf; + } discard; + } cont; struct { diff --git a/xlators/cluster/dht/src/dht-common.h b/xlators/cluster/dht/src/dht-common.h index de35e843f..fb90e48cc 100644 --- a/xlators/cluster/dht/src/dht-common.h +++ b/xlators/cluster/dht/src/dht-common.h @@ -693,6 +693,8 @@ int32_t dht_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iatt *stbuf, int32_t valid, dict_t *xdata); int32_t dht_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t mode, off_t offset, size_t len, dict_t *xdata); +int32_t dht_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, + off_t offset, size_t len, dict_t *xdata); int32_t dht_init (xlator_t *this); void dht_fini (xlator_t *this); diff --git a/xlators/cluster/dht/src/dht-inode-write.c b/xlators/cluster/dht/src/dht-inode-write.c index 56ed36ef0..9bcd84ae1 100644 --- a/xlators/cluster/dht/src/dht-inode-write.c +++ b/xlators/cluster/dht/src/dht-inode-write.c @@ -20,6 +20,7 @@ int dht_writev2 (xlator_t *this, call_frame_t *frame, int ret); int dht_truncate2 (xlator_t *this, call_frame_t *frame, int ret); int dht_setattr2 (xlator_t *this, call_frame_t *frame, int ret); int dht_fallocate2(xlator_t *this, call_frame_t *frame, int op_ret); +int dht_discard2(xlator_t *this, call_frame_t *frame, int op_ret); int dht_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this, @@ -488,6 +489,141 @@ err: } +int +dht_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, struct iatt *prebuf, + struct iatt *postbuf, dict_t *xdata) +{ + dht_local_t *local = NULL; + call_frame_t *prev = NULL; + int ret = -1; + + GF_VALIDATE_OR_GOTO ("dht", frame, err); + GF_VALIDATE_OR_GOTO ("dht", this, out); + GF_VALIDATE_OR_GOTO ("dht", frame->local, out); + GF_VALIDATE_OR_GOTO ("dht", cookie, out); + + local = frame->local; + prev = cookie; + + if ((op_ret == -1) && (op_errno != ENOENT)) { + local->op_errno = op_errno; + local->op_ret = -1; + gf_log (this->name, GF_LOG_DEBUG, + "subvolume %s returned -1 (%s)", + prev->this->name, strerror (op_errno)); + + goto out; + } + + if (local->call_cnt != 1) { + if (local->stbuf.ia_blocks) { + dht_iatt_merge (this, postbuf, &local->stbuf, NULL); + dht_iatt_merge (this, prebuf, &local->prebuf, NULL); + } + goto out; + } + local->rebalance.target_op_fn = dht_discard2; + + /* Phase 2 of migration */ + if ((op_ret == -1) || IS_DHT_MIGRATION_PHASE2 (postbuf)) { + ret = dht_rebalance_complete_check (this, frame); + if (!ret) + return 0; + } + + /* Check if the rebalance phase1 is true */ + if (IS_DHT_MIGRATION_PHASE1 (postbuf)) { + dht_iatt_merge (this, &local->stbuf, postbuf, NULL); + dht_iatt_merge (this, &local->prebuf, prebuf, NULL); + ret = fd_ctx_get (local->fd, this, NULL); + if (!ret) { + dht_discard2 (this, frame, 0); + return 0; + } + ret = dht_rebalance_in_progress_check (this, frame); + if (!ret) + return 0; + } + +out: + DHT_STRIP_PHASE1_FLAGS (postbuf); + DHT_STRIP_PHASE1_FLAGS (prebuf); + DHT_STACK_UNWIND (discard, frame, op_ret, op_errno, + prebuf, postbuf, xdata); +err: + return 0; +} + +int +dht_discard2(xlator_t *this, call_frame_t *frame, int op_ret) +{ + dht_local_t *local = NULL; + xlator_t *subvol = NULL; + uint64_t tmp_subvol = 0; + int ret = -1; + + local = frame->local; + + if (local->fd) + ret = fd_ctx_get (local->fd, this, &tmp_subvol); + if (!ret) + subvol = (xlator_t *)(long)tmp_subvol; + + if (!subvol) + subvol = local->cached_subvol; + + local->call_cnt = 2; /* This is the second attempt */ + + STACK_WIND(frame, dht_discard_cbk, subvol, subvol->fops->discard, + local->fd, local->rebalance.offset, local->rebalance.size, + NULL); + + return 0; +} + +int +dht_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + xlator_t *subvol = NULL; + int op_errno = -1; + dht_local_t *local = NULL; + + VALIDATE_OR_GOTO (frame, err); + VALIDATE_OR_GOTO (this, err); + VALIDATE_OR_GOTO (fd, err); + + local = dht_local_init (frame, NULL, fd, GF_FOP_DISCARD); + if (!local) { + op_errno = ENOMEM; + goto err; + } + + local->rebalance.offset = offset; + local->rebalance.size = len; + + local->call_cnt = 1; + subvol = local->cached_subvol; + if (!subvol) { + gf_log (this->name, GF_LOG_DEBUG, + "no cached subvolume for fd=%p", fd); + op_errno = EINVAL; + goto err; + } + + STACK_WIND (frame, dht_discard_cbk, subvol, subvol->fops->discard, + fd, offset, len, xdata); + + return 0; + +err: + op_errno = (op_errno == -1) ? errno : op_errno; + DHT_STACK_UNWIND (discard, frame, -1, op_errno, NULL, NULL, NULL); + + return 0; +} + /* handle cases of migration here for 'setattr()' calls */ int dht_file_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this, diff --git a/xlators/cluster/dht/src/dht.c b/xlators/cluster/dht/src/dht.c index d3031e203..0349b63a9 100644 --- a/xlators/cluster/dht/src/dht.c +++ b/xlators/cluster/dht/src/dht.c @@ -71,6 +71,7 @@ struct xlator_fops fops = { .setattr = dht_setattr, .fsetattr = dht_fsetattr, .fallocate = dht_fallocate, + .discard = dht_discard, }; struct xlator_dumpops dumpops = { diff --git a/xlators/cluster/stripe/src/stripe.c b/xlators/cluster/stripe/src/stripe.c index 3c56464b8..c1294bdd4 100644 --- a/xlators/cluster/stripe/src/stripe.c +++ b/xlators/cluster/stripe/src/stripe.c @@ -3941,6 +3941,172 @@ err: int32_t +stripe_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) +{ + int32_t callcnt = 0; + stripe_local_t *local = NULL; + stripe_local_t *mlocal = NULL; + call_frame_t *prev = NULL; + call_frame_t *mframe = NULL; + + if (!this || !frame || !frame->local || !cookie) { + gf_log ("stripe", GF_LOG_DEBUG, "possible NULL deref"); + goto out; + } + + prev = cookie; + local = frame->local; + mframe = local->orig_frame; + mlocal = mframe->local; + + LOCK(&frame->lock); + { + callcnt = ++mlocal->call_count; + + if (op_ret == 0) { + mlocal->post_buf = *postbuf; + mlocal->pre_buf = *prebuf; + + mlocal->prebuf_blocks += prebuf->ia_blocks; + mlocal->postbuf_blocks += postbuf->ia_blocks; + + correct_file_size(prebuf, mlocal->fctx, prev); + correct_file_size(postbuf, mlocal->fctx, prev); + + if (mlocal->prebuf_size < prebuf->ia_size) + mlocal->prebuf_size = prebuf->ia_size; + if (mlocal->postbuf_size < postbuf->ia_size) + mlocal->postbuf_size = postbuf->ia_size; + } + + /* return the first failure */ + if (mlocal->op_ret == 0) { + mlocal->op_ret = op_ret; + mlocal->op_errno = op_errno; + } + } + UNLOCK (&frame->lock); + + if ((callcnt == mlocal->wind_count) && mlocal->unwind) { + mlocal->pre_buf.ia_size = mlocal->prebuf_size; + mlocal->pre_buf.ia_blocks = mlocal->prebuf_blocks; + mlocal->post_buf.ia_size = mlocal->postbuf_size; + mlocal->post_buf.ia_blocks = mlocal->postbuf_blocks; + + STRIPE_STACK_UNWIND (discard, mframe, mlocal->op_ret, + mlocal->op_errno, &mlocal->pre_buf, + &mlocal->post_buf, NULL); + } +out: + STRIPE_STACK_DESTROY(frame); + return 0; +} + +int32_t +stripe_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + stripe_local_t *local = NULL; + stripe_fd_ctx_t *fctx = NULL; + int32_t op_errno = 1; + int32_t idx = 0; + int32_t offset_offset = 0; + int32_t remaining_size = 0; + off_t fill_size = 0; + uint64_t stripe_size = 0; + uint64_t tmp_fctx = 0; + off_t dest_offset = 0; + call_frame_t *fframe = NULL; + stripe_local_t *flocal = NULL; + + VALIDATE_OR_GOTO (frame, err); + VALIDATE_OR_GOTO (this, err); + VALIDATE_OR_GOTO (fd, err); + VALIDATE_OR_GOTO (fd->inode, err); + + inode_ctx_get (fd->inode, this, &tmp_fctx); + if (!tmp_fctx) { + op_errno = EINVAL; + goto err; + } + fctx = (stripe_fd_ctx_t *)(long)tmp_fctx; + stripe_size = fctx->stripe_size; + + STRIPE_VALIDATE_FCTX (fctx, err); + + remaining_size = len; + + local = mem_get0 (this->local_pool); + if (!local) { + op_errno = ENOMEM; + goto err; + } + frame->local = local; + local->stripe_size = stripe_size; + local->fctx = fctx; + + if (!stripe_size) { + gf_log (this->name, GF_LOG_DEBUG, + "Wrong stripe size for the file"); + op_errno = EINVAL; + goto err; + } + + while (1) { + fframe = copy_frame(frame); + flocal = mem_get0(this->local_pool); + if (!flocal) { + op_errno = ENOMEM; + goto err; + } + flocal->orig_frame = frame; + fframe->local = flocal; + + /* send discard request to the associated child node */ + idx = (((offset + offset_offset) / + local->stripe_size) % fctx->stripe_count); + + fill_size = (local->stripe_size - + ((offset + offset_offset) % local->stripe_size)); + if (fill_size > remaining_size) + fill_size = remaining_size; + + remaining_size -= fill_size; + + local->wind_count++; + if (remaining_size == 0) + local->unwind = 1; + + dest_offset = offset + offset_offset; + if (fctx->stripe_coalesce) + dest_offset = coalesced_offset(dest_offset, + local->stripe_size, fctx->stripe_count); + + /* + * TODO: Create a separate handler for coalesce mode that sends a + * single discard per-child (since the ranges are linear). + */ + STACK_WIND(fframe, stripe_discard_cbk, fctx->xl_array[idx], + fctx->xl_array[idx]->fops->discard, fd, dest_offset, + fill_size, xdata); + + offset_offset += fill_size; + if (remaining_size == 0) + break; + } + + return 0; +err: + if (fframe) + STRIPE_STACK_DESTROY(fframe); + + STRIPE_STACK_UNWIND (discard, frame, -1, op_errno, NULL, NULL, NULL); + return 0; +} + +int32_t stripe_release (xlator_t *this, fd_t *fd) { return 0; @@ -5389,6 +5555,7 @@ struct xlator_fops fops = { .fremovexattr = stripe_fremovexattr, .readdirp = stripe_readdirp, .fallocate = stripe_fallocate, + .discard = stripe_discard, }; struct xlator_cbks cbks = { diff --git a/xlators/debug/io-stats/src/io-stats.c b/xlators/debug/io-stats/src/io-stats.c index 5bb0e9d61..4f27a2e41 100644 --- a/xlators/debug/io-stats/src/io-stats.c +++ b/xlators/debug/io-stats/src/io-stats.c @@ -1736,6 +1736,18 @@ io_stats_fallocate_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int +io_stats_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) +{ + UPDATE_PROFILE_STATS(frame, DISCARD); + STACK_UNWIND_STRICT(discard, frame, op_ret, op_errno, prebuf, postbuf, + xdata); + return 0; +} + + +int io_stats_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct gf_flock *lock, dict_t *xdata) { @@ -2416,6 +2428,20 @@ io_stats_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t mode, return 0; } + +int +io_stats_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + START_FOP_LATENCY(frame); + + STACK_WIND(frame, io_stats_discard_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->discard, fd, offset, len, xdata); + + return 0; +} + + int io_stats_lk (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t cmd, struct gf_flock *lock, dict_t *xdata) @@ -2843,6 +2869,7 @@ struct xlator_fops fops = { .setattr = io_stats_setattr, .fsetattr = io_stats_fsetattr, .fallocate = io_stats_fallocate, + .discard = io_stats_discard, }; struct xlator_cbks cbks = { diff --git a/xlators/features/marker/src/marker.c b/xlators/features/marker/src/marker.c index 2dc03f931..112e71dff 100644 --- a/xlators/features/marker/src/marker.c +++ b/xlators/features/marker/src/marker.c @@ -1876,6 +1876,75 @@ err: return 0; } + +int32_t +marker_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) +{ + marker_local_t *local = NULL; + marker_conf_t *priv = NULL; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_TRACE, "%s occurred during discard", + strerror (op_errno)); + } + + local = (marker_local_t *) frame->local; + + frame->local = NULL; + + STACK_UNWIND_STRICT (discard, frame, op_ret, op_errno, prebuf, + postbuf, xdata); + + if (op_ret == -1 || local == NULL) + goto out; + + priv = this->private; + + if (priv->feature_enabled & GF_QUOTA) + mq_initiate_quota_txn (this, &local->loc); + + if (priv->feature_enabled & GF_XTIME) + marker_xtime_update_marks (this, local); +out: + marker_local_unref (local); + + return 0; +} + +int32_t +marker_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + int32_t ret = 0; + marker_local_t *local = NULL; + marker_conf_t *priv = NULL; + + priv = this->private; + + if (priv->feature_enabled == 0) + goto wind; + + local = mem_get0 (this->local_pool); + + MARKER_INIT_LOCAL (frame, local); + + ret = marker_inode_loc_fill (fd->inode, &local->loc); + + if (ret == -1) + goto err; +wind: + STACK_WIND (frame, marker_discard_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->discard, fd, offset, len, xdata); + return 0; +err: + STACK_UNWIND_STRICT (discard, frame, -1, ENOMEM, NULL, NULL, NULL); + + return 0; +} + + /* when a call from the special client is received on * key trusted.glusterfs.volume-mark with value "RESET" * or if the value is 0length, update the change the @@ -2686,6 +2755,7 @@ struct xlator_fops fops = { .getxattr = marker_getxattr, .readdirp = marker_readdirp, .fallocate = marker_fallocate, + .discard = marker_discard, }; struct xlator_cbks cbks = { diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c index 59472b914..1b97d4302 100644 --- a/xlators/mount/fuse/src/fuse-bridge.c +++ b/xlators/mount/fuse/src/fuse-bridge.c @@ -2669,10 +2669,13 @@ fuse_fallocate_resume(fuse_state_t *state) state->finh->unique, state->fd, state->flags, state->size, state->off); - /* we only support KEEP_SIZE */ - FUSE_FOP(state, fuse_fallocate_cbk, GF_FOP_FALLOCATE, fallocate, state->fd, - (state->flags & FALLOC_FL_KEEP_SIZE), state->off, state->size, - state->xdata); + if (state->flags & FALLOC_FL_PUNCH_HOLE) + FUSE_FOP(state, fuse_fallocate_cbk, GF_FOP_DISCARD, discard, + state->fd, state->off, state->size, state->xdata); + else + FUSE_FOP(state, fuse_fallocate_cbk, GF_FOP_FALLOCATE, fallocate, + state->fd, (state->flags & FALLOC_FL_KEEP_SIZE), + state->off, state->size, state->xdata); } static void @@ -2687,13 +2690,6 @@ fuse_fallocate(xlator_t *this, fuse_in_header_t *finh, void *msg) state->flags = ffi->mode; state->fd = FH_TO_FD(ffi->fh); - /* discard TBD as separate FOP */ - if (state->flags & FALLOC_FL_PUNCH_HOLE) { - send_fuse_err(this, finh, EOPNOTSUPP); - free_fuse_state(state); - return; - } - fuse_resolve_fd_init(state, &state->resolve, state->fd); fuse_resolve_and_resume(state, fuse_fallocate_resume); } diff --git a/xlators/performance/io-cache/src/io-cache.c b/xlators/performance/io-cache/src/io-cache.c index 30dc14a9c..d0667e469 100644 --- a/xlators/performance/io-cache/src/io-cache.c +++ b/xlators/performance/io-cache/src/io-cache.c @@ -1422,6 +1422,33 @@ ioc_readdirp (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, return 0; } +static int32_t +ioc_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *pre, + struct iatt *post, dict_t *xdata) +{ + STACK_UNWIND_STRICT(discard, frame, op_ret, op_errno, pre, post, xdata); + return 0; +} + +static int32_t +ioc_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + uint64_t ioc_inode = 0; + + inode_ctx_get (fd->inode, this, &ioc_inode); + + if (ioc_inode) + ioc_inode_flush ((ioc_inode_t *)(long)ioc_inode); + + STACK_WIND(frame, ioc_discard_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->discard, fd, offset, len, xdata); + return 0; +} + + + int32_t ioc_get_priority_list (const char *opt_str, struct list_head *first) { @@ -2044,6 +2071,7 @@ struct xlator_fops fops = { .mknod = ioc_mknod, .readdirp = ioc_readdirp, + .discard = ioc_discard, }; diff --git a/xlators/performance/io-threads/src/io-threads.c b/xlators/performance/io-threads/src/io-threads.c index 33642bffb..c6bdc3754 100644 --- a/xlators/performance/io-threads/src/io-threads.c +++ b/xlators/performance/io-threads/src/io-threads.c @@ -308,6 +308,7 @@ iot_schedule (call_frame_t *frame, xlator_t *this, call_stub_t *stub) case GF_FOP_FXATTROP: case GF_FOP_RCHECKSUM: case GF_FOP_FALLOCATE: + case GF_FOP_DISCARD: pri = IOT_PRI_LO; break; @@ -2459,6 +2460,56 @@ out: } int +iot_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, + struct iatt *preop, struct iatt *postop, dict_t *xdata) +{ + STACK_UNWIND_STRICT (discard, frame, op_ret, op_errno, preop, postop, + xdata); + return 0; +} + + +int +iot_discard_wrapper(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + STACK_WIND (frame, iot_discard_cbk, FIRST_CHILD (this), + FIRST_CHILD (this)->fops->discard, fd, offset, len, xdata); + return 0; +} + + +int +iot_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + call_stub_t *stub = NULL; + int ret = -1; + + stub = fop_discard_stub(frame, iot_discard_wrapper, fd, offset, len, + xdata); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot create discard stub" + "(out of memory)"); + ret = -ENOMEM; + goto out; + } + + ret = iot_schedule (frame, this, stub); + +out: + if (ret < 0) { + STACK_UNWIND_STRICT (discard, frame, -1, -ret, NULL, NULL, + NULL); + if (stub != NULL) { + call_stub_destroy (stub); + } + } + return 0; +} + +int __iot_workers_scale (iot_conf_t *conf) { int scale = 0; @@ -2788,6 +2839,7 @@ struct xlator_fops fops = { .fxattrop = iot_fxattrop, .rchecksum = iot_rchecksum, .fallocate = iot_fallocate, + .discard = iot_discard, }; struct xlator_cbks cbks; diff --git a/xlators/performance/md-cache/src/md-cache.c b/xlators/performance/md-cache/src/md-cache.c index 0b2c94319..2f52cbe58 100644 --- a/xlators/performance/md-cache/src/md-cache.c +++ b/xlators/performance/md-cache/src/md-cache.c @@ -1889,6 +1889,45 @@ int mdc_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t mode, } int +mdc_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) +{ + mdc_local_t *local = NULL; + + local = frame->local; + + if (op_ret != 0) + goto out; + + if (!local) + goto out; + + mdc_inode_iatt_set_validate(this, local->fd->inode, prebuf, postbuf); + +out: + MDC_STACK_UNWIND(discard, frame, op_ret, op_errno, prebuf, postbuf, + xdata); + + return 0; +} + +int mdc_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + mdc_local_t *local; + + local = mdc_local_get(frame); + local->fd = fd_ref(fd); + + STACK_WIND(frame, mdc_discard_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->discard, fd, offset, len, + xdata); + + return 0; +} + +int mdc_forget (xlator_t *this, inode_t *inode) { mdc_inode_wipe (this, inode); @@ -2017,6 +2056,7 @@ struct xlator_fops fops = { .readdirp = mdc_readdirp, .readdir = mdc_readdir, .fallocate = mdc_fallocate, + .discard = mdc_discard, }; diff --git a/xlators/performance/open-behind/src/open-behind.c b/xlators/performance/open-behind/src/open-behind.c index 5ac813132..26b684e88 100644 --- a/xlators/performance/open-behind/src/open-behind.c +++ b/xlators/performance/open-behind/src/open-behind.c @@ -701,6 +701,25 @@ err: } int +ob_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + call_stub_t *stub; + + stub = fop_discard_stub(frame, default_discard_resume, fd, offset, len, + xdata); + if (!stub) + goto err; + + open_and_resume(this, fd, stub); + + return 0; +err: + STACK_UNWIND_STRICT(discard, frame, -1, ENOMEM, NULL, NULL, NULL); + return 0; +} + +int ob_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc, int xflags, dict_t *xdata) { @@ -922,6 +941,7 @@ struct xlator_fops fops = { .fxattrop = ob_fxattrop, .fsetattr = ob_fsetattr, .fallocate = ob_fallocate, + .discard = ob_discard, .unlink = ob_unlink, .rename = ob_rename, .lk = ob_lk, diff --git a/xlators/performance/read-ahead/src/read-ahead.c b/xlators/performance/read-ahead/src/read-ahead.c index 522fa52b8..241fa477f 100644 --- a/xlators/performance/read-ahead/src/read-ahead.c +++ b/xlators/performance/read-ahead/src/read-ahead.c @@ -942,6 +942,55 @@ unwind: 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_priv_dump (xlator_t *this) @@ -1123,6 +1172,7 @@ struct xlator_fops fops = { .truncate = ra_truncate, .ftruncate = ra_ftruncate, .fstat = ra_fstat, + .discard = ra_discard, }; struct xlator_cbks cbks = { diff --git a/xlators/protocol/client/src/client-rpc-fops.c b/xlators/protocol/client/src/client-rpc-fops.c index 53cf3968a..c05542834 100644 --- a/xlators/protocol/client/src/client-rpc-fops.c +++ b/xlators/protocol/client/src/client-rpc-fops.c @@ -1993,6 +1993,61 @@ out: } int +client3_3_discard_cbk(struct rpc_req *req, struct iovec *iov, int count, + void *myframe) +{ + call_frame_t *frame = NULL; + gfs3_discard_rsp rsp = {0,}; + struct iatt prestat = {0,}; + struct iatt poststat = {0,}; + int ret = 0; + xlator_t *this = NULL; + dict_t *xdata = NULL; + + this = THIS; + + frame = myframe; + + if (-1 == req->rpc_status) { + rsp.op_ret = -1; + rsp.op_errno = ENOTCONN; + goto out; + } + ret = xdr_to_generic(*iov, &rsp, (xdrproc_t) xdr_gfs3_discard_rsp); + if (ret < 0) { + gf_log (this->name, GF_LOG_ERROR, "XDR decoding failed"); + rsp.op_ret = -1; + rsp.op_errno = EINVAL; + goto out; + } + + if (-1 != rsp.op_ret) { + gf_stat_to_iatt (&rsp.statpre, &prestat); + gf_stat_to_iatt (&rsp.statpost, &poststat); + } + + GF_PROTOCOL_DICT_UNSERIALIZE (this, xdata, (rsp.xdata.xdata_val), + (rsp.xdata.xdata_len), ret, + rsp.op_errno, out); + +out: + if (rsp.op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, "remote operation failed: %s", + strerror (gf_error_to_errno (rsp.op_errno))); + } + CLIENT_STACK_UNWIND (discard, frame, rsp.op_ret, + gf_error_to_errno (rsp.op_errno), &prestat, + &poststat, xdata); + + free (rsp.xdata.xdata_val); + + if (xdata) + dict_unref (xdata); + + return 0; +} + +int client3_3_setattr_cbk (struct rpc_req *req, struct iovec *iov, int count, void *myframe) { @@ -5888,6 +5943,50 @@ unwind: return 0; } +int32_t +client3_3_discard(call_frame_t *frame, xlator_t *this, void *data) +{ + clnt_args_t *args = NULL; + int64_t remote_fd = -1; + clnt_conf_t *conf = NULL; + gfs3_discard_req req = {{0},}; + int op_errno = ESTALE; + int ret = 0; + + if (!frame || !this || !data) + goto unwind; + + args = data; + conf = this->private; + + CLIENT_GET_REMOTE_FD (this, args->fd, DEFAULT_REMOTE_FD, + remote_fd, op_errno, unwind); + + req.fd = remote_fd; + req.offset = args->offset; + req.size = args->size; + memcpy(req.gfid, args->fd->inode->gfid, 16); + + GF_PROTOCOL_DICT_SERIALIZE (this, args->xdata, (&req.xdata.xdata_val), + req.xdata.xdata_len, op_errno, unwind); + + ret = client_submit_request(this, &req, frame, conf->fops, + GFS3_OP_DISCARD, client3_3_discard_cbk, + NULL, NULL, 0, NULL, 0, NULL, + (xdrproc_t) xdr_gfs3_discard_req); + if (ret) + gf_log (this->name, GF_LOG_WARNING, "failed to send the fop"); + + GF_FREE (req.xdata.xdata_val); + + return 0; +unwind: + CLIENT_STACK_UNWIND(discard, frame, -1, op_errno, NULL, NULL, NULL); + GF_FREE (req.xdata.xdata_val); + + return 0; +} + /* Table Specific to FOPS */ @@ -5934,6 +6033,7 @@ rpc_clnt_procedure_t clnt3_3_fop_actors[GF_FOP_MAXVALUE] = { [GF_FOP_FSETATTR] = { "FSETATTR", client3_3_fsetattr }, [GF_FOP_READDIRP] = { "READDIRP", client3_3_readdirp }, [GF_FOP_FALLOCATE] = { "FALLOCATE", client3_3_fallocate }, + [GF_FOP_DISCARD] = { "DISCARD", client3_3_discard }, [GF_FOP_RELEASE] = { "RELEASE", client3_3_release }, [GF_FOP_RELEASEDIR] = { "RELEASEDIR", client3_3_releasedir }, [GF_FOP_GETSPEC] = { "GETSPEC", client3_getspec }, @@ -5984,6 +6084,7 @@ char *clnt3_3_fop_names[GFS3_OP_MAXVALUE] = { [GFS3_OP_FSETATTR] = "FSETATTR", [GFS3_OP_READDIRP] = "READDIRP", [GFS3_OP_FALLOCATE] = "FALLOCATE", + [GFS3_OP_DISCARD] = "DISCARD", [GFS3_OP_RELEASE] = "RELEASE", [GFS3_OP_RELEASEDIR] = "RELEASEDIR", [GFS3_OP_FREMOVEXATTR] = "FREMOVEXATTR", diff --git a/xlators/protocol/client/src/client.c b/xlators/protocol/client/src/client.c index 377263af6..aa2b8eef8 100644 --- a/xlators/protocol/client/src/client.c +++ b/xlators/protocol/client/src/client.c @@ -1997,6 +1997,40 @@ out: } int32_t +client_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + int ret = -1; + clnt_conf_t *conf = NULL; + rpc_clnt_procedure_t *proc = NULL; + clnt_args_t args = {0,}; + + conf = this->private; + if (!conf || !conf->fops) + goto out; + + args.fd = fd; + args.offset = offset; + args.size = len; + args.xdata = xdata; + + proc = &conf->fops->proctable[GF_FOP_DISCARD]; + if (!proc) { + gf_log (this->name, GF_LOG_ERROR, + "rpc procedure not found for %s", + gf_fop_list[GF_FOP_DISCARD]); + goto out; + } + if (proc->fn) + ret = proc->fn (frame, this, &args); +out: + if (ret) + STACK_UNWIND_STRICT(discard, frame, -1, ENOTCONN, NULL, NULL, NULL); + + return 0; +} + +int32_t client_getspec (call_frame_t *frame, xlator_t *this, const char *key, int32_t flags) { @@ -2714,6 +2748,7 @@ struct xlator_fops fops = { .setattr = client_setattr, .fsetattr = client_fsetattr, .fallocate = client_fallocate, + .discard = client_discard, .getspec = client_getspec, }; diff --git a/xlators/protocol/server/src/server-rpc-fops.c b/xlators/protocol/server/src/server-rpc-fops.c index 4b847eabd..55e30fdd7 100644 --- a/xlators/protocol/server/src/server-rpc-fops.c +++ b/xlators/protocol/server/src/server-rpc-fops.c @@ -2008,6 +2008,45 @@ out: return 0; } +int +server_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, + struct iatt *statpre, struct iatt *statpost, dict_t *xdata) +{ + gfs3_discard_rsp rsp = {0,}; + server_state_t *state = NULL; + rpcsvc_request_t *req = NULL; + + req = frame->local; + state = CALL_STATE (frame); + + GF_PROTOCOL_DICT_SERIALIZE (this, xdata, (&rsp.xdata.xdata_val), + rsp.xdata.xdata_len, op_errno, out); + + if (op_ret) { + gf_log (this->name, GF_LOG_INFO, + "%"PRId64": DISCARD %"PRId64" (%s) ==> (%s)", + frame->root->unique, state->resolve.fd_no, + uuid_utoa (state->resolve.gfid), + strerror (op_errno)); + goto out; + } + + gf_stat_from_iatt (&rsp.statpre, statpre); + gf_stat_from_iatt (&rsp.statpost, statpost); + +out: + rsp.op_ret = op_ret; + rsp.op_errno = gf_errno_to_error (op_errno); + + server_submit_reply(frame, req, &rsp, NULL, 0, NULL, + (xdrproc_t) xdr_gfs3_discard_rsp); + + GF_FREE (rsp.xdata.xdata_val); + + return 0; +} + /* Resume function section */ int @@ -2975,6 +3014,26 @@ err: return 0; } +int +server_discard_resume (call_frame_t *frame, xlator_t *bound_xl) +{ + server_state_t *state = NULL; + + state = CALL_STATE (frame); + + if (state->resolve.op_ret != 0) + goto err; + + STACK_WIND (frame, server_discard_cbk, + bound_xl, bound_xl->fops->discard, + state->fd, state->offset, state->size, state->xdata); + return 0; +err: + server_discard_cbk(frame, NULL, frame->this, state->resolve.op_ret, + state->resolve.op_errno, NULL, NULL, NULL); + + return 0; +} /* Fop section */ @@ -3213,6 +3272,68 @@ out: return ret; } + + +int +server3_3_discard(rpcsvc_request_t *req) +{ + server_state_t *state = NULL; + call_frame_t *frame = NULL; + gfs3_discard_req args = {{0},}; + int ret = -1; + int op_errno = 0; + + if (!req) + return ret; + + ret = xdr_to_generic (req->msg[0], &args, + (xdrproc_t)xdr_gfs3_discard_req); + if (ret < 0) { + //failed to decode msg; + req->rpc_err = GARBAGE_ARGS; + goto out; + } + + frame = get_frame_from_request (req); + if (!frame) { + // something wrong, mostly insufficient memory + req->rpc_err = GARBAGE_ARGS; /* TODO */ + goto out; + } + frame->root->op = GF_FOP_DISCARD; + + state = CALL_STATE (frame); + if (!state->conn->bound_xl) { + /* auth failure, request on subvolume without setvolume */ + req->rpc_err = GARBAGE_ARGS; + goto out; + } + + state->resolve.type = RESOLVE_MUST; + state->resolve.fd_no = args.fd; + + state->offset = args.offset; + state->size = args.size; + memcpy(state->resolve.gfid, args.gfid, 16); + + GF_PROTOCOL_DICT_UNSERIALIZE (state->conn->bound_xl, state->xdata, + (args.xdata.xdata_val), + (args.xdata.xdata_len), ret, + op_errno, out); + + ret = 0; + resolve_and_resume (frame, server_discard_resume); + +out: + free (args.xdata.xdata_val); + + if (op_errno) + req->rpc_err = GARBAGE_ARGS; + + return ret; +} + + int server3_3_readlink (rpcsvc_request_t *req) { @@ -5867,6 +5988,7 @@ rpcsvc_actor_t glusterfs3_3_fop_actors[] = { [GFS3_OP_FSETATTR] = { "FSETATTR", GFS3_OP_FSETATTR, server3_3_fsetattr, NULL, 0}, [GFS3_OP_READDIRP] = { "READDIRP", GFS3_OP_READDIRP, server3_3_readdirp, NULL, 0}, [GFS3_OP_FALLOCATE] = { "FALLOCATE", GFS3_OP_FALLOCATE, server3_3_fallocate, NULL, 0}, + [GFS3_OP_DISCARD] = { "DISCARD", GFS3_OP_DISCARD, server3_3_discard, NULL, 0}, [GFS3_OP_RELEASE] = { "RELEASE", GFS3_OP_RELEASE, server3_3_release, NULL, 0}, [GFS3_OP_RELEASEDIR] = { "RELEASEDIR", GFS3_OP_RELEASEDIR, server3_3_releasedir, NULL, 0}, [GFS3_OP_FREMOVEXATTR] = { "FREMOVEXATTR", GFS3_OP_FREMOVEXATTR, server3_3_fremovexattr, NULL, 0}, diff --git a/xlators/storage/posix/src/posix.c b/xlators/storage/posix/src/posix.c index 368834037..05101fd31 100644 --- a/xlators/storage/posix/src/posix.c +++ b/xlators/storage/posix/src/posix.c @@ -562,16 +562,12 @@ out: } static int32_t -_posix_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t keep_size, - off_t offset, size_t len, dict_t *xdata) +posix_do_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags, + off_t offset, size_t len, struct iatt *statpre, + struct iatt *statpost) { - int32_t op_ret = -1; - int32_t op_errno = 0; - struct iatt statpre = {0,}; - struct iatt statpost = {0,}; struct posix_fd *pfd = NULL; int32_t ret = -1; - int32_t flags = 0; DECLARE_OLD_FS_ID_VAR; @@ -583,48 +579,87 @@ _posix_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t keep_siz ret = posix_fd_ctx_get (fd, this, &pfd); if (ret < 0) { - op_errno = -ret; gf_log (this->name, GF_LOG_DEBUG, "pfd is NULL from fd=%p", fd); goto out; } - op_ret = posix_fdstat (this, pfd->fd, &statpre); - if (op_ret == -1) { - op_errno = errno; + ret = posix_fdstat (this, pfd->fd, statpre); + if (ret == -1) { + ret = -errno; gf_log (this->name, GF_LOG_ERROR, "fallocate (fstat) failed on fd=%p: %s", fd, - strerror (op_errno)); + strerror (errno)); goto out; } - if (keep_size) - flags = FALLOC_FL_KEEP_SIZE; - - op_ret = sys_fallocate(pfd->fd, flags, offset, len); - if (op_ret == -1) { - op_errno = errno; + ret = sys_fallocate(pfd->fd, flags, offset, len); + if (ret == -1) { + ret = -errno; goto out; } - op_ret = posix_fdstat (this, pfd->fd, &statpost); - if (op_ret == -1) { - op_errno = errno; + ret = posix_fdstat (this, pfd->fd, statpost); + if (ret == -1) { + ret = -errno; gf_log (this->name, GF_LOG_ERROR, "fallocate (fstat) failed on fd=%p: %s", fd, - strerror (op_errno)); + strerror (errno)); goto out; } - op_ret = 0; - out: SET_TO_OLD_FS_ID (); - STACK_UNWIND_STRICT (fallocate, frame, op_ret, op_errno, - &statpre, &statpost, NULL); + return ret; +} + +static int32_t +_posix_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t keep_size, + off_t offset, size_t len, dict_t *xdata) +{ + int32_t ret; + int32_t flags = 0; + struct iatt statpre = {0,}; + struct iatt statpost = {0,}; + + if (keep_size) + flags = FALLOC_FL_KEEP_SIZE; + + ret = posix_do_fallocate(frame, this, fd, flags, offset, len, + &statpre, &statpost); + if (ret < 0) + goto err; + + STACK_UNWIND_STRICT(fallocate, frame, 0, 0, &statpre, &statpost, NULL); + return 0; + +err: + STACK_UNWIND_STRICT(fallocate, frame, -1, -ret, NULL, NULL, NULL); + return 0; +} + +static int32_t +posix_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + int32_t ret; + int32_t flags = FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE; + struct iatt statpre = {0,}; + struct iatt statpost = {0,}; + + ret = posix_do_fallocate(frame, this, fd, flags, offset, len, + &statpre, &statpost); + if (ret < 0) + goto err; + + STACK_UNWIND_STRICT(discard, frame, 0, 0, &statpre, &statpost, NULL); + return 0; + +err: + STACK_UNWIND_STRICT(discard, frame, -1, -ret, NULL, NULL, NULL); + return 0; - return 0; } int32_t @@ -4726,6 +4761,7 @@ struct xlator_fops fops = { .setattr = posix_setattr, .fsetattr = posix_fsetattr, .fallocate = _posix_fallocate, + .discard = posix_discard, }; struct xlator_cbks cbks = { |