- 20 Aug, 2013 26 commits
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Chandra Seetharaman authored
For XFS, add support for Q_XGETQSTATV quotactl command. Signed-off-by:
Chandra Seetharaman <sekharan@us.ibm.com> Reviewed-by:
Rich Johnston <rjohnston@sgi.com> Signed-off-by:
Ben Myers <bpm@sgi.com>
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Chandra Seetharaman authored
XFS now supports three types of quotas (user, group and project). Current version of Q_XGETSTAT has support for only two types of quotas. In order to support three types of quotas, the interface, specifically struct fs_quota_stat, need to be expanded. Current version of fs_quota_stat does not allow expansion without breaking backward compatibility. So, a quotactl command and new fs_quota_stat structure need to be added. This patch adds a new command Q_XGETQSTATV to quotactl() which takes a new data structure fs_quota_statv. This new data structure provides support for future expansion and backward compatibility. Callers of the new quotactl command have to set the version of the data structure being passed, and kernel will fill as much data as requested. If the kernel does not support the user-space provided version, EINVAL will be returned. User-space can reduce the version number and call the same quotactl again. Signed-off-by:
Jan Kara <jack@suse.cz> Reviewed-by:
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Zhi Yong Wu authored
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Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Reviewed-by:
Mark Tinguely <tinguely@sgi.com> Signed-off-by:
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
Follow up with xfs naming style. Signed-off-by:
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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- 15 Aug, 2013 8 commits
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Dave Chinner authored
When a transaction is cancelled and the buffer log item is clean in the transaction, the buffer log item is unconditionally freed. If the log item is in the AIL, however, this leads to a use after free condition as the item still has other users. In this case, xfs_buf_item_relse() should only be called on clean buffer items if the reference count has dropped to zero. This ensures only the last user frees the item. Signed-off-by:
Dave Chinner <dchinner@redhat.com> Reviewed-by:
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Dwight Engen authored
Reviewed-by:
Gao feng <gaofeng@cn.fujitsu.com> Signed-off-by:
Dwight Engen <dwight.engen@oracle.com> Signed-off-by:
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Dwight Engen authored
Check for CAP_SYS_ADMIN since the caller can truncate preallocated blocks from files they do not own nor have write access to. A more fine grained access check was considered: require the caller to specify their own uid/gid and to use inode_permission to check for write, but this would not catch the case of an inode not reachable via path traversal from the callers mount namespace. Add check for read-only filesystem to free eofblocks ioctl. Reviewed-by:
Brian Foster <bfoster@redhat.com> Reviewed-by:
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Dwight Engen authored
Have eofblocks ioctl convert uid_t to kuid_t into internal structure. Update internal filter matching to compare ids with kuid_t types. Reviewed-by:
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Dwight Engen authored
Use uint32 from init_user_ns for xfs internal uid/gid representation in xfs_icdinode, xfs_dqid_t. Reviewed-by:
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Dwight Engen authored
Use inode_capable() to check if SUID|SGID bits should be cleared to match similar check in inode_change_ok(). The check for CAP_LINUX_IMMUTABLE was not modified since all other file systems also check against init_user_ns rather than current_user_ns. Only allow changing of projid from init_user_ns. Reviewed-by:
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Dwight Engen authored
Change permission check for setting ACL to use inode_owner_or_capable() which will additionally allow a CAP_FOWNER user in a user namespace to be able to set an ACL on an inode covered by the user namespace mapping. Reviewed-by:
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Dwight Engen authored
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- 13 Aug, 2013 6 commits
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Dave Chinner authored
The xc_cil_lock is used for two purposes - to protect the CIL itself, and to protect the push/commit state and lists. These are two logically separate structures and operations, so can have their own locks. This means that pushing on the CIL and the commit wait ordering won't contend for a lock with other transactions that are completing concurrently. As the CIL insertion is the hottest path throught eh CIL, this is a big win. Signed-off-by:
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Dave Chinner authored
Now that all the log item preparation and formatting is done under the CIL lock, we can get rid of the intermediate log vector chain used to track items to be inserted into the CIL. We can already find all the items to be committed from the transaction handle, so as long as we attach the log vectors to the item before we insert the items into the CIL, we don't need to create a log vector chain to pass around. This means we can move all the item insertion code into and optimise it into a pair of simple passes across all the items in the transaction. The first pass does the formatting and accounting, the second inserts them all into the CIL. We keep this two pass split so that we can separate the CIL insertion - which must be done under the CIL spinlock - from the formatting. We could insert each item into the CIL with a single pass, but that massively increases the number of times we have to grab the CIL spinlock. It is much more efficient (and hence scalable) to do a batch operation and insert all objects in a single lock grab. Signed-off-by:
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Dave Chinner authored
Now that we have the size of the log vector that has been allocated, we can determine if we need to allocate a new log vector for formatting and insertion. We only need to allocate a new vector if it won't fit into the existing buffer. However, we need to hold the CIL context lock while we do this so that we can't race with a push draining the currently queued log vectors. It is safe to do this as long as we do GFP_NOFS allocation to avoid avoid memory allocation recursing into the filesystem. Hence we can safely overwrite the existing log vector on the CIL if it is large enough to hold all the dirty regions of the current item. Signed-off-by:
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Dave Chinner authored
Now that we have the size of the object before the formatting pass is called, we can allocation the log vector and it's buffer in a single allocation rather than two separate allocations. Store the size of the allocated buffer in the log vector so that we potentially avoid allocation for future modifications of the object. While touching this code, remove the IOP_FORMAT definition. Signed-off-by:
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Dave Chinner authored
To begin optimising the CIL commit process, we need to have IOP_SIZE return both the number of vectors and the size of the data pointed to by the vectors. This enables us to calculate the size ofthe memory allocation needed before the formatting step and reduces the number of memory allocations per item by one. While there, kill the IOP_SIZE macro. Signed-off-by:
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Eric Sandeen authored
xlog_find_tail() currently leaks a bp on one error path. There is no error target, so manually free the bp before returning the error. Found by Coverity. Signed-off-by:
Eric Sandeen <sandeen@redhat.com> Reviewed-by:
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