| Commit message (Collapse) | Author | Age | Files | Lines |
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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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This adds the Linux dentry cache implementation to barebox.
Until now every filesystem driver resolves the full path to a file for
itself. This leads to code duplication and is error prone since
resolving paths is a complicated task. Also it can narrow down the
lookup performance since barebox only knows ASCII paths and has no way
of caching lookups.
With this patch we get the Linux dcache implementation. The path
resolving code from fs/namei.c is nearly taken as-is, minus the RCU
and locking code. Dcaching is made simple as of now: We simply cache
everything and never release any dentries. Although we do reference
counting for inodes and dentries it is effectively not used yet.
We never free anything until a fs is unmounted in which case we free
everything no matter if references are taken or not.
This patch also contains a wrapper in fs/legacy.c to support
filesystems with the old API.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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lseek checks for non-negative in-memory offsets (addresses), failing otherwise.
However negative address 0xffffffffXXXXXXXX is a valid MIPS64 virtual address.
Signed-off-by: Peter Mamonov <pmamonov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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When there are links in the path mkdir/rmdir are called with then
canonicalize_path is needed which resolves the links.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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fs.c has some whitespaces where there should be tabs. Fix it.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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fs.c is already heavily filled with code. Move mem_write/mem_read
to devfs-core where it fits better.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Add a struct super_operations we can use later when we get a fs
implementation closer to Linux. Only add the functions we'll likely
need though.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Remove code that was added to UBIFS for U-Boot but that is not needed
for barebox.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Remove stuff that was added to UBIFS for U-Boot which we do not need
because we already have it in the Linux header files.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Linux also has struct file_operations which are something different.
Rename our file_operations to cdev_operations which better matches
what we have.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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In __canonicalize_path() we dereference the pointer returned by
get_fsdevice_by_path() without checking if the pointer is NULL or not.
When the pointer is NULL it leads to an Ooops.
Ooops, address error on load or ifetch!
$ 0 : 00000000 00000001 a0000026 a0811c10
$ 4 : a0402e60 a0402e48 a0811c00 a0402e58
$ 8 : 00000001 00000000 0000005a 00000023
$12 : 00000000 00000002 00601021 00000000
$16 : a0402e60 a0402e50 a0402e39 a0810000
$20 : a0402e38 a0811420 a0811424 00000000
$24 : 00000000 a080de10
$28 : 87f87d40 a03ffa68 a0810000 a080ce30
Hi : 00000002
Lo : 00000000
epc : a080ce34
ra : a080ce30
Status: 00000006
Cause : 40008010
Config: 80040483
### ERROR ### Please RESET the board ###
Fixes: d79a81736 fs: Don't bother filesystems without link support with additional stat() calls
Signed-off-by: Gaël PORTAY <gael.portay@savoirfairelinux.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Make CONFIG_RATP a selectable config option, so that the user can
enable RATP support without explicitly needing to enable the full
console support over RATP (e.g. only for RATP FS or built-in command
support).
The full console can still be explicitly enabled with
CONFIG_CONSOLE_RATP.
Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Based on kernel commit 87bf54bb43dd ("squashfs: Add zstd support").
Creating zstd compressed squashfs images is supported by squashfs-tools
newer than commit e38956b92f73 ("squashfs-tools: Add zstd support").
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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We have helper functions now to ease file caching when a file
is on TFTP. Use them.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Some commands need files in which they can lseek backwards which
is particularly not possible on TFTP. Instead of hiding this
behind can_lseek_backward() create a function for it which tests
if the file is on TFTP directly rather than using different
lseek operations.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Having no valid data in pstore after a coldstart is pretty much
expected, so do not print a scary error message, but a debug message
instead.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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When loop mounting, allow to specify an offset into the file, similarly
to the losetup offset option. Multiplicative suffixes are supported.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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"path" is allocated by normalise_path() and thus must be
freed. This was done in the error path, but not in the success
path.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Since commit ce0cc7fe we support forward seek on tftpfs. This feature
breaks the condition to check rather we open an uimage over tftp. Since
backward seeking is the problem here, we add the function
can_lseek_backward and check for it instead of the simple lseek.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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xzalloc() either returns memory or panics, so checking for NULL is useless.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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with this parch, EFI System partition will be mounted to /boot
instead of /mnt/diskXX.
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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In __canonicalize_path() we only call stat() to know if the path
is a link or not. When the filesystem doesn't support links we
already know that it's not a link, so we do not need to call stat().
This helps the tftp filesystem since the parent directories of
a file to be opened won't be stat()ed anymore, something tftp
does not support.
Fixes: a602bebc fs: Implement links to directories
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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In __canonicalize_path pathes beginning with '//' can occur. This
is normally not a problem since normalize_path() will clean this
up, but it means we cannot call get_fsdevice_by_path() on these
pathes in this function, as needed in the next patch.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
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Instead of erroring out when a file is not present, just return ENOENT if the
file does not exist and let the fs-layer handle the situation correctly.
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Allow to create a loopback cdev from a file.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Fixed up with:
fs: Makefile: Add parseopt to all builds
parseopt.h was included to fs.c with commit 9248b, but parseopt.o has a
dependency to CONFIG_FS_NFS.
Moved parseopt.o to the default build to eliminate build failures.
Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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In barebox the default mount path for a cdev is /mnt/<cdevname>
which can be mounted with "mount <cdevname>" without specifying
a target path explicitly. Simplify this further by creating automount
entries for the default mount pathes which makes a manual mount
completely unnecessary.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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parseopt.h was included to fs.c with commit 9248b, but parseopt.o has a
dependency to CONFIG_FS_NFS.
Moved parseopt.o to the default build to eliminate build failures.
Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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So far links can only point to files. Implement links to
directories. With this all kinds of links are supported:
- relative links
- absolute links
- links including ".."
- link loops (are detected, return -EMLINK)
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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path_check_prereq() has some bugs:
- It's called with S_IFLNK, but this is effectively a no-op because this
case is not implemented in the function
- It uses lstat, but if stat or lstat should be used depends on the
usecase: For opendir() stat() must be used, since we are not
interested in the link, but in the target. For readlink() lstat() must
be used since we are indeed interested in the link, not the target.
It's easier and better understandable to open code the functionality
where it's needed, so drop path_check_prereq() and do the right thing
where called.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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The patch fixes this compiler's warning:
fs/squashfs/squashfs.c:115:6: warning: no previous prototype for 'squashfs_set_rootarg' [-Wmissing-prototypes]
void squashfs_set_rootarg(struct squashfs_priv *priv, struct fs_device_d *fsdev)
^
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Instead of having a flag indicating a cdev is a partition on
some master cdev, just add a master pointer to the cdev, so
that we can also find out who the master is.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Partitions on mtd devices are implemented as mtd devices themselves
which have a ioctl hook. The DEVFS_IS_PARTITION flag is never set
for these devices, so the partition offset translation code in
fs/devfs-core.c is unused. Remove it.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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We currently do not have a way to iterate over all partitions of
a cdev. Change this.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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This is an adoption of the U-Boot commit
| commit f798b1dda1c5de818b806189e523d1b75db7e72d
| Author: Stefan Brüns <stefan.bruens@rwth-aachen.de>
| Date: Sat Sep 17 02:10:09 2016 +0200
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| ext4: Use correct descriptor size when reading the block group descriptor
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| The correct descriptor size must be used when calculating offsets, and
| also to read the correct amount of data.
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| Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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This is an adoption of the U-Boot commits
| commit fc214ef90910159f33fbe92a6cb77839a27fa8a6
| Author: Stefan Brüns <stefan.bruens@rwth-aachen.de>
| Date: Sat Sep 17 02:10:07 2016 +0200
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| ext4: determine group descriptor size for 64bit feature
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| If EXT4_FEATURE_INCOMPAT_64BIT is set, the descriptor can be read from
| the superblocks, otherwise it defaults to 32.
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| Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
| commit 3cc5bbb8e68dc67b7c3d2fdebef69408e5271469
| Author: Stefan Brüns <stefan.bruens@rwth-aachen.de>
| Date: Tue Dec 27 02:35:08 2016 +0100
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| fs/ext4: Initialize group descriptor size for revision level 0 filesystems
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| genext2fs creates revision level 0 filesystems, which are not readable
| by u-boot due to the initialized group descriptor size field.
| f798b1dda1c5de818b806189e523d1b75db7e72d
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| Reported-by: Kever Yang <kever.yang@rock-chips.com>
| Reported-by: FrostyBytes@protonmail.com
| Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
| Tested-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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This is an adoption of the U-Boot commit
| commit 3ee2f977f3649bcc1d0de86356145e8e6999575a
| Author: Stefan Brüns <stefan.bruens@rwth-aachen.de>
| Date: Sat Sep 17 02:10:06 2016 +0200
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| ext4: Update ext2/3/4 superblock, group descriptor and inode structures
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| Most importantly, the superblock provides the used group descriptor size,
| which is required for the EXT4_FEATURE_INCOMPAT_64BIT.
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| Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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