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...; created Oldest Snapshot = Home-2013.01.16-05.07.03, @/home/.snapdir/@GMT-2013.01.16-05.07.03 Performing rsync with 7 excludes used from config file. rsync took 115m, 11s Empty-directory removal took 0m, 48s Find size of dir @ /home.diff size=14248587264, minsize=17098304717, extent_size=4194304, nextents=4077 Old volume active: Deactivated. Removed. size=17100177408 Create vol. Home-2013.01.16-05.07.03, size 15.9G Logical volume "Home-2013.01.16-05.07.03" created About to copy base-diff dir to static Copying diffs to dated static snap...Time: 403m, 11s. mklabel@ /home/.snapdir/@GMT-2...

I'm hoping to implement .extents for the nbd plugin; this is a prerequisite. I'm not sure about patch 3 - if we like it, I'll squash it to 2, if we don't, I think we are okay just dropping it. I'm also wondering if we have to worry about malicious plugins that don't populate the entire .pread buffer in an effort to get nbdkit to expose portions of the heap; my patch 7 loses

Updated based on other changes that have happened in the meantime: - rely more on cleanup.h (throughout) - split structured read for easier review (patch 2 and 3 were combined in v1) - rely on nbdkit not leaking a server's partial answer (patch 3) - add tests (patch 5) - other bug fixes I found while testing it - drop EOVERFLOW patch for now; it will be separate once upstream NBD protocol

...ransaction **trans_out) -{ - union { - struct simple_reply simple; - struct structured_reply structured; - } rep; - struct transaction *trans; - void *buf = NULL; - CLEANUP_FREE char *payload = NULL; - uint32_t count; - uint32_t id; - struct block_descriptor *extents = NULL; - size_t nextents = 0; - int error = NBD_SUCCESS; - bool more = false; - uint32_t len = 0; /* 0 except for structured reads */ - uint64_t offset = 0; /* if len, absolute offset of structured read chunk */ - bool zero = false; /* if len, whether to read or memset */ - uint16_t errlen; - - *trans_out = NULL; -...

...ransaction **trans_out) -{ - union { - struct simple_reply simple; - struct structured_reply structured; - } rep; - struct transaction *trans; - void *buf = NULL; - CLEANUP_FREE char *payload = NULL; - uint32_t count; - uint32_t id; - struct block_descriptor *extents = NULL; - size_t nextents = 0; - int error = NBD_SUCCESS; - bool more = false; - uint32_t len = 0; /* 0 except for structured reads */ - uint64_t offset = 0; /* if len, absolute offset of structured read chunk */ - bool zero = false; /* if len, whether to read or memset */ - uint16_t errlen; - - *trans_out = NULL; -...

...*trans_out) -{ - union { - struct nbd_simple_reply simple; - struct nbd_structured_reply structured; - } rep; - struct transaction *trans; - void *buf = NULL; - CLEANUP_FREE char *payload = NULL; - uint32_t count; - uint32_t id; - struct nbd_block_descriptor *extents = NULL; - size_t nextents = 0; - int error = NBD_SUCCESS; - bool more = false; - uint32_t len = 0; /* 0 except for structured reads */ - uint64_t offset = 0; /* if len, absolute offset of structured read chunk */ - bool zero = false; /* if len, whether to read or memset */ - uint16_t errlen; - - *trans_out = NULL; -...

Patch 1 played with an early draft of Rich's Fedora 30 libnbd package: https://bugzilla.redhat.com/show_bug.cgi?id=1713767#c17 Note that comment 21 provides a newer package 0.1.1-1 with a different API; and that libnbd has more unreleased API changes in the pipeline (whether that will be called 0.2 or 0.1.2); so we'll have to tweak things based on what is actually available in distros.

libnbd-0.1.2-1 is now available in Fedora 29/30 updates-testing, although it was not compiled against libxml2 so it lacks uri support (I ended up testing patch 4 with a self-built libnbd). Diffs since v1 - rebase to master, bump from libnbd 0.1 to 0.1.2, add URI support, better timing results Still not done - patch 5 needs associated tests Eric Blake (5): nbd: Check for libnbd nbd:

libnbd-0.1.4-1 is now available in Fedora 29/30 updates testing. Diffs since v2 - rebase to master, bump from libnbd 0.1.2 to 0.1.3+, add tests to TLS usage which flushed out the need to turn relative pathnames into absolute, doc tweaks Now that the testsuite covers TLS and libnbd has been fixed to provide the things I found lacking when developing v2, I'm leaning towards pushing this on

...ile *file, + struct dirent *dirent, xfs_dinode_t *core) +{ + return xfs_readdir_dir2_block(file, dirent, core); +} + +static inline int xfs_fmt_extents_readdir(struct file *file, + struct dirent *dirent, + xfs_dinode_t *core) +{ + int retval; + + if (be32_to_cpu(core->di_nextents) <= 1) { + /* Single-block Directories */ + retval = xfs_readdir_dir2_block(file, dirent, core); + } else if (xfs_dir2_isleaf(file->fs, core)) { + /* Leaf Directory */ + retval = xfs_readdir_dir2_leaf(file, dirent, core); + } else { + /* Node Directory */ + retval = xfs_readdir_dir2_no...

...nt8_t *buf = NULL; xfs_debug("dname %s parent %p core %p", dname, parent, core); - bmbt_irec_get(&irec, ((xfs_bmbt_rec_t *)&core->di_literal_area[0]) + + bmbt_irec_get(&irec, (xfs_bmbt_rec_t *)XFS_DFORK_PTR(core, XFS_DATA_FORK) + be32_to_cpu(core->di_nextents) - 1); leaf_blk = fsblock_to_bytes(parent->fs, irec.br_startblock) >> BLOCK_SHIFT(parent->fs); - leaf = (xfs_dir2_leaf_t *)xfs_dir2_dirblks_get_cached(parent->fs, leaf_blk, - irec.br_blockcount); - if (be16_to_cpu(leaf->hdr.info.magic) != XFS_DIR2_LEAF1...