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2020-01-20fs/adfs: super: add support for E and E+ floppy image formatsRussell King1-1/+17
Add support for ADFS E and E+ floppy image formats, which, unlike their hard disk variants, do not have a filesystem boot block - they have a single map zone, with the map fragment stored at sector 0. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: super: extract filesystem block probeRussell King1-71/+78
Separate the filesystem block probing from the superblock filling so we can support other ADFS filesystem formats, such as the single-zone E and E+ floppy image formats which do not have a boot block. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: remove debug in adfs_dir_update()Russell King1-3/+0
Remove the noisy debug in adfs_dir_update(). Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: super: fix inode droppingRussell King1-1/+7
When we have write support enabled, we must not drop inodes before they have been written back, otherwise we lose updates to the filesystem on umount. Keep the inodes around unless we are built in read-only mode, or we are mounted read-only. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: bigdir: implement directory update supportRussell King1-1/+53
Implement big directory entry update support in the same way that we do for new directories. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: bigdir: calculate and validate directory checkbyteRussell King1-0/+38
When reading a big directory, calculate the validate the directory checkbyte to ensure that the directory contents are valid. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: bigdir: directory validation strengtheningRussell King1-1/+28
Strengthen the directory validation by ensuring that the header fields contain sensible values that fit inside the directory, and limit the directory size to 4MB as per RISC OS requirements. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: bigdir: extract directory validationRussell King1-10/+31
Extract the directory validation from the directory reading function as we will want to re-use this code. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: bigdir: factor out directory entry offset calculationRussell King1-6/+11
Factor out the directory entry byte offset calculation. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: newdir: split out directory commit from updateRussell King3-13/+18
After changing a directory, we need to update the sequence numbers and calculate the new check byte before the directory is scheduled to be written back to the media. Since this needs to happen for any change to the directory, move this into a separate method. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: newdir: clean up adfs_f_update()Russell King1-49/+24
__adfs_dir_put() and adfs_dir_find_entry() are only called from adfs_f_update(), so move them into this function, removing some unnecessary entry copying by doing so. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: newdir: merge adfs_dir_read() into adfs_f_read()Russell King1-26/+7
adfs_dir_read() is only called from adfs_f_read(), so merge it into that function. As new directories are always 2048 bytes in size, (which we rely on elsewhere) we can consolidate some of the code. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: newdir: improve directory validationRussell King1-0/+1
Check that the lastmask and reserved fields are all zero, as per the documentation. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: newdir: factor out directory format validationRussell King1-28/+20
We have two locations where we validate the new directory format, so factor this out to a helper. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: use pointers to access directory head/tailsRussell King3-36/+29
Add and use pointers in the adfs_dir structure to access the directory head and tail structures, which will always be contiguous in a buffer. This allows us to avoid memcpy()ing the data in the new directory code, making it slightly more efficient. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: add more efficient iterate() per-format methodRussell King4-14/+42
Rather than using setpos + getnext to iterate through the directory entries, pass iterate() down to the dir format code to populate the dirents. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: switch to iterate_shared methodRussell King1-3/+2
There is nothing in our readdir (aka iterate) method that relies on the directory inode being exclusively locked, so switch to using the iterate_shared() hook rather than iterate(). Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: improve compiler coverage in adfs_dir_updateRussell King1-3/+5
Get rid of the ifdef, using IS_ENABLED() instead to detect whether the code should be callable. This allows the compiler to always parse the following code, reducing the chances of errors being missed. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: improve update failure handlingRussell King1-12/+36
When we update a directory, a number of errors may happen. If we failed to find the entry to update, we can just release the directory buffers as normal. However, if we have some other error, we may have partially updated the buffers, resulting in an invalid directory. In this case, we need to discard the buffers to avoid writing the contents back to the media, and later re-read the directory from the media. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: modernise on-disk directory structuresRussell King2-27/+31
Use __u8 and pack the structures for on-disk directories. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: update directory lockingRussell King1-26/+29
Update directory locking such that it covers the validation of the directory, which could fail if another thread is concurrently writing to the same directory. Since we may sleep, we need to use a rwsem rather than a rw spinlock. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: add helper to mark directory buffers dirtyRussell King2-4/+13
Provide a helper for marking directory buffers dirty so they get written back to disk. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: add helper to read directory using inodeRussell King1-10/+22
Add a helper to read a directory using the inode, which we do in two places. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: add generic directory readingRussell King4-77/+74
Both directory formats code the mechanics of fetching the directory buffers using their own implementations. Consolidate these into one implementation. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: add generic copy functionsRussell King4-82/+75
Directories can span multiple buffers, and we currently open-code memcpy access to these buffers, including dealing with entries that are split across multiple buffers. Such code exists in both directory format implementations. Provide common functions to allow data to be copied from/to the directory buffers as if they were a contiguous set of buffers, and use them when accessing directories. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: add common directory sync methodRussell King4-40/+18
adfs_fplus_sync() can be used for both directory formats since we now have a common way to access the buffer heads, so move it into dir.c and appropriately rename it. Remove the directory-format specific implementations. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: add common directory buffer release methodRussell King4-60/+25
With the bhs pointer in place, we have no need for separate per-format free() methods, since a generic version will do. Provide a generic implementation, remove the format specific implementations and the method function pointer. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: add common dir object initialisationRussell King3-12/+13
Initialise the dir object before we pass it down to the directory format specific read handler. This allows us to get rid of the initialisation inside those handlers. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: dir: rename bh_fplus to bhsRussell King2-30/+28
Rename bh_fplus to bhs in preparation to make some of the directory handling code sharable between implementations. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: map: fix map scanningRussell King1-2/+7
When scanning the map for a fragment id, we need to keep track of the free space links, so we don't inadvertently believe that the freespace link is a valid fragment id. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: map: move map-specific sb initialisation to map.cRussell King2-10/+10
Move map specific superblock initialisation to map.c, rather than having it spread into super.c. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: map: use find_next_bit_le() rather than open coding itRussell King1-55/+21
Use find_next_bit_le() to find the end of a fragment in the map rather than open-coding this functionality. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: map: incorporate map offsets into layoutRussell King1-11/+11
lookup_zone() and scan_free_map() cope in different ways with the location of the map data within a zone: 1. lookup_zone() adds a four byte offset to the map data pointer to skip over the check and free link bytes. 2. scan_free_map() needs to use the free link pointer, which is an offset from itself, so we end up adding a 32-bit offset to the end pointer (aka mapsize) which is really confusing. Rename mapsize to endbit as this is really what it is, and incorporate the 32-bit offset into the map layout. This means that both dm_startbit and dm_endbit are now bit offsets from the start of the buffer, rather than four bytes in to the buffer. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: map: factor out map cleanupRussell King3-8/+11
We have several places which deal with releasing the map buffers and freeing the map array. Provide a helper for this. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: map: break up adfs_read_map()Russell King1-21/+59
Split up adfs_read_map() into separate helpers to layout the map, read the map, and release the map buffers. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: map: rename adfs_map_free() to adfs_map_statfs()Russell King3-9/+10
adfs_map_free() is not obvious whether it is freeing the map or returning the number of free blocks on the filesystem. Rename it to the more generic statfs() to make it clear that it's a statistic function. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: map: move map reading and validation to map.cRussell King3-98/+100
Keep all the map code together in map.c, rather than having some in super.c Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: inode: fix adfs_mode2atts()Russell King1-9/+9
Fix adfs_mode2atts() to actually update the file permissions on the media rather than using the current inode mode. Note also that directories do not have read/write permissions stored on the media. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2020-01-20fs/adfs: inode: update timestamps to centisecond precisionRussell King2-20/+22
Despite ADFS timestamps having centi-second granularity, and Linux gaining fine-grained timestamp support in v2.5.48, fs/adfs was never updated. Update fs/adfs to centi-second support, and ensure that the inode ctime always reflects what is written in underlying media. Signed-off-by: Russell King <[email protected]> Signed-off-by: Al Viro <[email protected]>
2019-12-08Linux 5.5-rc1Linus Torvalds1-2/+2
2019-12-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds119-628/+1025
Pull networking fixes from David Miller: 1) More jumbo frame fixes in r8169, from Heiner Kallweit. 2) Fix bpf build in minimal configuration, from Alexei Starovoitov. 3) Use after free in slcan driver, from Jouni Hogander. 4) Flower classifier port ranges don't work properly in the HW offload case, from Yoshiki Komachi. 5) Use after free in hns3_nic_maybe_stop_tx(), from Yunsheng Lin. 6) Out of bounds access in mqprio_dump(), from Vladyslav Tarasiuk. 7) Fix flow dissection in dsa TX path, from Alexander Lobakin. 8) Stale syncookie timestampe fixes from Guillaume Nault. [ Did an evil merge to silence a warning introduced by this pull - Linus ] * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (84 commits) r8169: fix rtl_hw_jumbo_disable for RTL8168evl net_sched: validate TCA_KIND attribute in tc_chain_tmplt_add() r8169: add missing RX enabling for WoL on RTL8125 vhost/vsock: accept only packets with the right dst_cid net: phy: dp83867: fix hfs boot in rgmii mode net: ethernet: ti: cpsw: fix extra rx interrupt inet: protect against too small mtu values. gre: refetch erspan header from skb->data after pskb_may_pull() pppoe: remove redundant BUG_ON() check in pppoe_pernet tcp: Protect accesses to .ts_recent_stamp with {READ,WRITE}_ONCE() tcp: tighten acceptance of ACKs not matching a child socket tcp: fix rejected syncookies due to stale timestamps lpc_eth: kernel BUG on remove tcp: md5: fix potential overestimation of TCP option space net: sched: allow indirect blocks to bind to clsact in TC net: core: rename indirect block ingress cb function net-sysfs: Call dev_hold always in netdev_queue_add_kobject net: dsa: fix flow dissection on Tx path net/tls: Fix return values to avoid ENOTSUPP net: avoid an indirect call in ____sys_recvmsg() ...
2019-12-08Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds12-32/+36
Pull more SCSI updates from James Bottomley: "Eleven patches, all in drivers (no core changes) that are either minor cleanups or small fixes. They were late arriving, but still safe for -rc1" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: MAINTAINERS: Add the linux-scsi mailing list to the ISCSI entry scsi: megaraid_sas: Make poll_aen_lock static scsi: sd_zbc: Improve report zones error printout scsi: qla2xxx: Fix qla2x00_request_irqs() for MSI scsi: qla2xxx: unregister ports after GPN_FT failure scsi: qla2xxx: fix rports not being mark as lost in sync fabric scan scsi: pm80xx: Remove unused include of linux/version.h scsi: pm80xx: fix logic to break out of loop when register value is 2 or 3 scsi: scsi_transport_sas: Fix memory leak when removing devices scsi: lpfc: size cpu map by last cpu id set scsi: ibmvscsi_tgt: Remove unneeded variable rc
2019-12-08Merge tag '5.5-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds13-72/+265
Pull cifs fixes from Steve French: "Nine cifs/smb3 fixes: - one fix for stable (oops during oplock break) - two timestamp fixes including important one for updating mtime at close to avoid stale metadata caching issue on dirty files (also improves perf by using SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB over the wire) - two fixes for "modefromsid" mount option for file create (now allows mode bits to be set more atomically and accurately on create by adding "sd_context" on create when modefromsid specified on mount) - two fixes for multichannel found in testing this week against different servers - two small cleanup patches" * tag '5.5-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6: smb3: improve check for when we send the security descriptor context on create smb3: fix mode passed in on create for modetosid mount option cifs: fix possible uninitialized access and race on iface_list cifs: Fix lookup of SMB connections on multichannel smb3: query attributes on file close smb3: remove unused flag passed into close functions cifs: remove redundant assignment to pointer pneg_ctxt fs: cifs: Fix atime update check vs mtime CIFS: Fix NULL-pointer dereference in smb2_push_mandatory_locks
2019-12-08Merge branch 'work.misc' of ↵Linus Torvalds4-6/+5
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull misc vfs cleanups from Al Viro: "No common topic, just three cleanups". * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: make __d_alloc() static fs/namespace: add __user to open_tree and move_mount syscalls fs/fnctl: fix missing __user in fcntl_rw_hint()
2019-12-07Merge tag 'ntb-5.5' of git://github.com/jonmason/ntbLinus Torvalds1-0/+1
Pull NTB update from Jon Mason: "Just a simple patch to add a new Hygon Device ID to the AMD NTB device driver" * tag 'ntb-5.5' of git://github.com/jonmason/ntb: NTB: Add Hygon Device ID
2019-12-07Merge branch 'for-linus' of ↵Linus Torvalds7-17/+51
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull more input updates from Dmitry Torokhov: - fixups for Synaptics RMI4 driver - a quirk for Goodinx touchscreen on Teclast tablet - a new keycode definition for activating privacy screen feature found on a few "enterprise" laptops - updates to snvs_pwrkey driver - polling uinput device for writing (which is always allowed) now works * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: synaptics-rmi4 - don't increment rmiaddr for SMBus transfers Input: synaptics-rmi4 - re-enable IRQs in f34v7_do_reflash Input: goodix - add upside-down quirk for Teclast X89 tablet Input: add privacy screen toggle keycode Input: uinput - fix returning EPOLLOUT from uinput_poll Input: snvs_pwrkey - remove gratuitous NULL initializers Input: snvs_pwrkey - send key events for i.MX6 S, DL and Q
2019-12-07Merge tag 'iomap-5.5-merge-14' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds1-12/+28
Pull iomap fixes from Darrick Wong: "Fix a race condition and a use-after-free error: - Fix a UAF when reporting writeback errors - Fix a race condition when handling page uptodate on fragmented file with blocksize < pagesize" * tag 'iomap-5.5-merge-14' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: iomap: stop using ioend after it's been freed in iomap_finish_ioend() iomap: fix sub-page uptodate handling
2019-12-07Merge tag 'xfs-5.5-merge-17' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds2-12/+17
Pull xfs fixes from Darrick Wong: "Fix a couple of resource management errors and a hang: - fix a crash in the log setup code when log mounting fails - fix a hang when allocating space on the realtime device - fix a block leak when freeing space on the realtime device" * tag 'xfs-5.5-merge-17' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: xfs: fix mount failure crash on invalid iclog memory access xfs: don't check for AG deadlock for realtime files in bunmapi xfs: fix realtime file data space leak
2019-12-07Merge tag 'for-linus-5.5-ofs1' of ↵Linus Torvalds3-7/+43
git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux Pull orangefs update from Mike Marshall: "orangefs: posix open permission checking... Orangefs has no open, and orangefs checks file permissions on each file access. Posix requires that file permissions be checked on open and nowhere else. Orangefs-through-the-kernel needs to seem posix compliant. The VFS opens files, even if the filesystem provides no method. We can see if a file was successfully opened for read and or for write by looking at file->f_mode. When writes are flowing from the page cache, file is no longer available. We can trust the VFS to have checked file->f_mode before writing to the page cache. The mode of a file might change between when it is opened and IO commences, or it might be created with an arbitrary mode. We'll make sure we don't hit EACCES during the IO stage by using UID 0" [ This is "posixish", but not a great solution in the long run, since a proper secure network server shouldn't really trust the client like this. But proper and secure POSIX behavior requires an open method and a resulting cookie for IO of some kind, or similar. - Linus ] * tag 'for-linus-5.5-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux: orangefs: posix open permission checking...
2019-12-07Merge tag 'nfsd-5.5' of git://linux-nfs.org/~bfields/linuxLinus Torvalds37-137/+343
Pull nfsd updates from Bruce Fields: "This is a relatively quiet cycle for nfsd, mainly various bugfixes. Possibly most interesting is Trond's fixes for some callback races that were due to my incomplete understanding of rpc client shutdown. Unfortunately at the last minute I've started noticing a new intermittent failure to send callbacks. As the logic seems basically correct, I'm leaving Trond's patches in for now, and hope to find a fix in the next week so I don't have to revert those patches" * tag 'nfsd-5.5' of git://linux-nfs.org/~bfields/linux: (24 commits) nfsd: depend on CRYPTO_MD5 for legacy client tracking NFSD fixing possible null pointer derefering in copy offload nfsd: check for EBUSY from vfs_rmdir/vfs_unink. nfsd: Ensure CLONE persists data and metadata changes to the target file SUNRPC: Fix backchannel latency metrics nfsd: restore NFSv3 ACL support nfsd: v4 support requires CRYPTO_SHA256 nfsd: Fix cld_net->cn_tfm initialization lockd: remove __KERNEL__ ifdefs sunrpc: remove __KERNEL__ ifdefs race in exportfs_decode_fh() nfsd: Drop LIST_HEAD where the variable it declares is never used. nfsd: document callback_wq serialization of callback code nfsd: mark cb path down on unknown errors nfsd: Fix races between nfsd4_cb_release() and nfsd4_shutdown_callback() nfsd: minor 4.1 callback cleanup SUNRPC: Fix svcauth_gss_proxy_init() SUNRPC: Trace gssproxy upcall results sunrpc: fix crash when cache_head become valid before update nfsd: remove private bin2hex implementation ...
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