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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-10 19:25:57 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-10 19:25:57 +0200 |
commit | 9f3a0941fb5efaa4d27911e251dc595034d58baa (patch) | |
tree | 7212d9872b41b73a0b3c4f8c991039b639add212 /fs/ext2 | |
parent | Merge tag 'rtc-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/abellon... (diff) | |
parent | Merge branch 'for-4.17/dax' into libnvdimm-for-next (diff) | |
download | linux-9f3a0941fb5efaa4d27911e251dc595034d58baa.tar.xz linux-9f3a0941fb5efaa4d27911e251dc595034d58baa.zip |
Merge tag 'libnvdimm-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams:
"This cycle was was not something I ever want to repeat as there were
several late changes that have only now just settled.
Half of the branch up to commit d2c997c0f145 ("fs, dax: use
page->mapping to warn...") have been in -next for several releases.
The of_pmem driver and the address range scrub rework were late
arrivals, and the dax work was scaled back at the last moment.
The of_pmem driver missed a previous merge window due to an oversight.
A sense of obligation to rectify that miss is why it is included for
4.17. It has acks from PowerPC folks. Stephen reported a build failure
that only occurs when merging it with your latest tree, for now I have
fixed that up by disabling modular builds of of_pmem. A test merge
with your tree has received a build success report from the 0day robot
over 156 configs.
An initial version of the ARS rework was submitted before the merge
window. It is self contained to libnvdimm, a net code reduction, and
passing all unit tests.
The filesystem-dax changes are based on the wait_var_event()
functionality from tip/sched/core. However, late review feedback
showed that those changes regressed truncate performance to a large
degree. The branch was rewound to drop the truncate behavior change
and now only includes preparation patches and cleanups (with full acks
and reviews). The finalization of this dax-dma-vs-trnucate work will
need to wait for 4.18.
Summary:
- A rework of the filesytem-dax implementation provides for detection
of unmap operations (truncate / hole punch) colliding with
in-progress device-DMA. A fix for these collisions remains a
work-in-progress pending resolution of truncate latency and
starvation regressions.
- The of_pmem driver expands the users of libnvdimm outside of x86
and ACPI to describe an implementation of persistent memory on
PowerPC with Open Firmware / Device tree.
- Address Range Scrub (ARS) handling is completely rewritten to
account for the fact that ARS may run for 100s of seconds and there
is no platform defined way to cancel it. ARS will now no longer
block namespace initialization.
- The NVDIMM Namespace Label implementation is updated to handle
label areas as small as 1K, down from 128K.
- Miscellaneous cleanups and updates to unit test infrastructure"
* tag 'libnvdimm-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (39 commits)
libnvdimm, of_pmem: workaround OF_NUMA=n build error
nfit, address-range-scrub: add module option to skip initial ars
nfit, address-range-scrub: rework and simplify ARS state machine
nfit, address-range-scrub: determine one platform max_ars value
powerpc/powernv: Create platform devs for nvdimm buses
doc/devicetree: Persistent memory region bindings
libnvdimm: Add device-tree based driver
libnvdimm: Add of_node to region and bus descriptors
libnvdimm, region: quiet region probe
libnvdimm, namespace: use a safe lookup for dimm device name
libnvdimm, dimm: fix dpa reservation vs uninitialized label area
libnvdimm, testing: update the default smart ctrl_temperature
libnvdimm, testing: Add emulation for smart injection commands
nfit, address-range-scrub: introduce nfit_spa->ars_state
libnvdimm: add an api to cast a 'struct nd_region' to its 'struct device'
nfit, address-range-scrub: fix scrub in-progress reporting
dax, dm: allow device-mapper to operate without dax support
dax: introduce CONFIG_DAX_DRIVER
fs, dax: use page->mapping to warn if truncate collides with a busy page
ext2, dax: introduce ext2_dax_aops
...
Diffstat (limited to 'fs/ext2')
-rw-r--r-- | fs/ext2/ext2.h | 1 | ||||
-rw-r--r-- | fs/ext2/inode.c | 46 | ||||
-rw-r--r-- | fs/ext2/namei.c | 18 |
3 files changed, 30 insertions, 35 deletions
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 032295e1d386..cc40802ddfa8 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -814,6 +814,7 @@ extern const struct inode_operations ext2_file_inode_operations; extern const struct file_operations ext2_file_operations; /* inode.c */ +extern void ext2_set_file_ops(struct inode *inode); extern const struct address_space_operations ext2_aops; extern const struct address_space_operations ext2_nobh_aops; extern const struct iomap_ops ext2_iomap_ops; diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 9b2ac55ac34f..1e01fabef130 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -940,9 +940,6 @@ ext2_direct_IO(struct kiocb *iocb, struct iov_iter *iter) loff_t offset = iocb->ki_pos; ssize_t ret; - if (WARN_ON_ONCE(IS_DAX(inode))) - return -EIO; - ret = blockdev_direct_IO(iocb, inode, iter, ext2_get_block); if (ret < 0 && iov_iter_rw(iter) == WRITE) ext2_write_failed(mapping, offset + count); @@ -952,17 +949,16 @@ ext2_direct_IO(struct kiocb *iocb, struct iov_iter *iter) static int ext2_writepages(struct address_space *mapping, struct writeback_control *wbc) { -#ifdef CONFIG_FS_DAX - if (dax_mapping(mapping)) { - return dax_writeback_mapping_range(mapping, - mapping->host->i_sb->s_bdev, - wbc); - } -#endif - return mpage_writepages(mapping, wbc, ext2_get_block); } +static int +ext2_dax_writepages(struct address_space *mapping, struct writeback_control *wbc) +{ + return dax_writeback_mapping_range(mapping, + mapping->host->i_sb->s_bdev, wbc); +} + const struct address_space_operations ext2_aops = { .readpage = ext2_readpage, .readpages = ext2_readpages, @@ -990,6 +986,13 @@ const struct address_space_operations ext2_nobh_aops = { .error_remove_page = generic_error_remove_page, }; +static const struct address_space_operations ext2_dax_aops = { + .writepages = ext2_dax_writepages, + .direct_IO = noop_direct_IO, + .set_page_dirty = noop_set_page_dirty, + .invalidatepage = noop_invalidatepage, +}; + /* * Probably it should be a library function... search for first non-zero word * or memcmp with zero_page, whatever is better for particular architecture. @@ -1388,6 +1391,18 @@ void ext2_set_inode_flags(struct inode *inode) inode->i_flags |= S_DAX; } +void ext2_set_file_ops(struct inode *inode) +{ + inode->i_op = &ext2_file_inode_operations; + inode->i_fop = &ext2_file_operations; + if (IS_DAX(inode)) + inode->i_mapping->a_ops = &ext2_dax_aops; + else if (test_opt(inode->i_sb, NOBH)) + inode->i_mapping->a_ops = &ext2_nobh_aops; + else + inode->i_mapping->a_ops = &ext2_aops; +} + struct inode *ext2_iget (struct super_block *sb, unsigned long ino) { struct ext2_inode_info *ei; @@ -1480,14 +1495,7 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino) ei->i_data[n] = raw_inode->i_block[n]; if (S_ISREG(inode->i_mode)) { - inode->i_op = &ext2_file_inode_operations; - if (test_opt(inode->i_sb, NOBH)) { - inode->i_mapping->a_ops = &ext2_nobh_aops; - inode->i_fop = &ext2_file_operations; - } else { - inode->i_mapping->a_ops = &ext2_aops; - inode->i_fop = &ext2_file_operations; - } + ext2_set_file_ops(inode); } else if (S_ISDIR(inode->i_mode)) { inode->i_op = &ext2_dir_inode_operations; inode->i_fop = &ext2_dir_operations; diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c index e078075dc66f..55f7caadb093 100644 --- a/fs/ext2/namei.c +++ b/fs/ext2/namei.c @@ -107,14 +107,7 @@ static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode if (IS_ERR(inode)) return PTR_ERR(inode); - inode->i_op = &ext2_file_inode_operations; - if (test_opt(inode->i_sb, NOBH)) { - inode->i_mapping->a_ops = &ext2_nobh_aops; - inode->i_fop = &ext2_file_operations; - } else { - inode->i_mapping->a_ops = &ext2_aops; - inode->i_fop = &ext2_file_operations; - } + ext2_set_file_ops(inode); mark_inode_dirty(inode); return ext2_add_nondir(dentry, inode); } @@ -125,14 +118,7 @@ static int ext2_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) if (IS_ERR(inode)) return PTR_ERR(inode); - inode->i_op = &ext2_file_inode_operations; - if (test_opt(inode->i_sb, NOBH)) { - inode->i_mapping->a_ops = &ext2_nobh_aops; - inode->i_fop = &ext2_file_operations; - } else { - inode->i_mapping->a_ops = &ext2_aops; - inode->i_fop = &ext2_file_operations; - } + ext2_set_file_ops(inode); mark_inode_dirty(inode); d_tmpfile(dentry, inode); unlock_new_inode(inode); |