Modules | |
group | Berkeley DB filesystems |
Subversion filesystems based on Berkeley DB. | |
group | Filesystem access contexts |
Filesystem Access Contexts. | |
group | Filesystem nodes |
Filesystem Nodes. | |
group | Filesystem transactions |
Filesystem Transactions. | |
group | Filesystem roots |
Roots. | |
group | Filesystem directories |
Directory entry names and directory paths. | |
group | Filesystem locks |
Data Structures | |
struct | svn_fs_dirent_t |
The type of a Subversion directory entry. More... | |
Typedefs | |
typedef svn_fs_t | svn_fs_t |
An object representing a Subversion filesystem. | |
typedef void(* | svn_fs_warning_callback_t )(void *baton, svn_error_t *err) |
The type of a warning callback function. | |
typedef svn_fs_history_t | svn_fs_history_t |
An opaque node history object. | |
typedef svn_fs_dirent_t | svn_fs_dirent_t |
The type of a Subversion directory entry. | |
Functions | |
svn_error_t * | svn_fs_initialize (apr_pool_t *pool) |
Callers should invoke this function to initialize global state in the FS library before creating FS objects. | |
void | svn_fs_set_warning_func (svn_fs_t *fs, svn_fs_warning_callback_t warning, void *warning_baton) |
Provide a callback function, warning, that fs should use to report (non-fatal) errors. | |
svn_error_t * | svn_fs_create (svn_fs_t **fs_p, const char *path, apr_hash_t *fs_config, apr_pool_t *pool) |
Create a new, empty Subversion filesystem, stored in the directory path, and return a pointer to it in *fs_p. | |
svn_error_t * | svn_fs_open (svn_fs_t **fs_p, const char *path, apr_hash_t *fs_config, apr_pool_t *pool) |
Open a Subversion filesystem located in the directory path, and return a pointer to it in *fs_p. | |
svn_error_t * | svn_fs_upgrade (const char *path, apr_pool_t *pool) |
Upgrade the Subversion filesystem located in the directory path to the latest version supported by this library. | |
svn_error_t * | svn_fs_type (const char **fs_type, const char *path, apr_pool_t *pool) |
Return, in *fs_type, a string identifying the back-end type of the Subversion filesystem located in path. | |
const char * | svn_fs_path (svn_fs_t *fs, apr_pool_t *pool) |
Return the path to fs's repository, allocated in pool. | |
svn_error_t * | svn_fs_delete_fs (const char *path, apr_pool_t *pool) |
Delete the filesystem at path. | |
svn_error_t * | svn_fs_hotcopy (const char *src_path, const char *dest_path, svn_boolean_t clean, apr_pool_t *pool) |
Copy a possibly live Subversion filesystem from src_path to dest_path. | |
svn_error_t * | svn_fs_recover (const char *path, svn_cancel_func_t cancel_func, void *cancel_baton, apr_pool_t *pool) |
Perform any necessary non-catastrophic recovery on the Subversion filesystem located at path. | |
svn_error_t * | svn_fs_check_path (svn_node_kind_t *kind_p, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *kind_p to the type of node present at path under root. | |
svn_error_t * | svn_fs_node_history (svn_fs_history_t **history_p, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *history_p to an opaque node history object which represents path under root. | |
svn_error_t * | svn_fs_history_prev (svn_fs_history_t **prev_history_p, svn_fs_history_t *history, svn_boolean_t cross_copies, apr_pool_t *pool) |
Set *prev_history_p to an opaque node history object which represents the previous (or "next oldest") interesting history location for the filesystem node represented by history, or NULL if no such previous history exists. | |
svn_error_t * | svn_fs_history_location (const char **path, svn_revnum_t *revision, svn_fs_history_t *history, apr_pool_t *pool) |
Set *path and *revision to the path and revision, respectively, of the history object. | |
svn_error_t * | svn_fs_is_dir (svn_boolean_t *is_dir, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *is_dir to TRUE iff path in root is a directory. | |
svn_error_t * | svn_fs_is_file (svn_boolean_t *is_file, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *is_file to TRUE iff path in root is a file. | |
svn_error_t * | svn_fs_node_id (const svn_fs_id_t **id_p, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Get the id of a node. | |
svn_error_t * | svn_fs_node_created_rev (svn_revnum_t *revision, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *revision to the revision in which path under root was created. | |
svn_error_t * | svn_fs_node_origin_rev (svn_revnum_t *revision, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *revision to the revision in which the line of history represented by path under root originated. | |
svn_error_t * | svn_fs_node_created_path (const char **created_path, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *created_path to the path at which path under root was created. | |
svn_error_t * | svn_fs_node_prop (svn_string_t **value_p, svn_fs_root_t *root, const char *path, const char *propname, apr_pool_t *pool) |
Set *value_p to the value of the property named propname of path in root. | |
svn_error_t * | svn_fs_node_proplist (apr_hash_t **table_p, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *table_p to the entire property list of path in root, as an APR hash table allocated in pool. | |
svn_error_t * | svn_fs_change_node_prop (svn_fs_root_t *root, const char *path, const char *name, const svn_string_t *value, apr_pool_t *pool) |
Change a node's property's value, or add/delete a property. | |
svn_error_t * | svn_fs_props_changed (svn_boolean_t *changed_p, svn_fs_root_t *root1, const char *path1, svn_fs_root_t *root2, const char *path2, apr_pool_t *pool) |
Determine if the properties of two path/root combinations are different. | |
svn_error_t * | svn_fs_copied_from (svn_revnum_t *rev_p, const char **path_p, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Discover a node's copy ancestry, if any. | |
svn_error_t * | svn_fs_closest_copy (svn_fs_root_t **root_p, const char **path_p, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *root_p and *path_p to the revision root and path of the destination of the most recent copy event that caused path to exist where it does in root, or to NULL if no such copy exists. | |
svn_error_t * | svn_fs_get_mergeinfo (svn_mergeinfo_catalog_t *catalog, svn_fs_root_t *root, const apr_array_header_t *paths, svn_mergeinfo_inheritance_t inherit, svn_boolean_t include_descendants, apr_pool_t *pool) |
Retrieve mergeinfo for multiple nodes. | |
svn_error_t * | svn_fs_merge (const char **conflict_p, svn_fs_root_t *source_root, const char *source_path, svn_fs_root_t *target_root, const char *target_path, svn_fs_root_t *ancestor_root, const char *ancestor_path, apr_pool_t *pool) |
Merge changes between two nodes into a third node. | |
svn_error_t * | svn_fs_dir_entries (apr_hash_t **entries_p, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *entries_p to a newly allocated APR hash table containing the entries of the directory at path in root. | |
svn_error_t * | svn_fs_make_dir (svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Create a new directory named path in root. | |
svn_error_t * | svn_fs_delete (svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Delete the node named path in root. | |
svn_error_t * | svn_fs_copy (svn_fs_root_t *from_root, const char *from_path, svn_fs_root_t *to_root, const char *to_path, apr_pool_t *pool) |
Create a copy of from_path in from_root named to_path in to_root. | |
svn_error_t * | svn_fs_revision_link (svn_fs_root_t *from_root, svn_fs_root_t *to_root, const char *path, apr_pool_t *pool) |
Like svn_fs_copy(), but doesn't record copy history, and preserves the PATH. | |
svn_error_t * | svn_fs_file_length (svn_filesize_t *length_p, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *length_p to the length of the file path in root, in bytes. | |
svn_error_t * | svn_fs_file_md5_checksum (unsigned char digest[], svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Put the MD5 checksum of file path into digest, which points to APR_MD5_DIGESTSIZE bytes of storage. | |
svn_error_t * | svn_fs_file_contents (svn_stream_t **contents, svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Set *contents to a readable generic stream that will yield the contents of the file path in root. | |
svn_error_t * | svn_fs_make_file (svn_fs_root_t *root, const char *path, apr_pool_t *pool) |
Create a new file named path in root. | |
svn_error_t * | svn_fs_apply_textdelta (svn_txdelta_window_handler_t *contents_p, void **contents_baton_p, svn_fs_root_t *root, const char *path, const char *base_checksum, const char *result_checksum, apr_pool_t *pool) |
Apply a text delta to the file path in root. | |
svn_error_t * | svn_fs_apply_text (svn_stream_t **contents_p, svn_fs_root_t *root, const char *path, const char *result_checksum, apr_pool_t *pool) |
Write data directly to the file path in root. | |
svn_error_t * | svn_fs_contents_changed (svn_boolean_t *changed_p, svn_fs_root_t *root1, const char *path1, svn_fs_root_t *root2, const char *path2, apr_pool_t *pool) |
Check if the contents of two root/path combos have changed. | |
svn_error_t * | svn_fs_youngest_rev (svn_revnum_t *youngest_p, svn_fs_t *fs, apr_pool_t *pool) |
Set *youngest_p to the number of the youngest revision in filesystem fs. | |
svn_error_t * | svn_fs_deltify_revision (svn_fs_t *fs, svn_revnum_t revision, apr_pool_t *pool) |
Deltify predecessors of paths modified in revision in filesystem fs. | |
svn_error_t * | svn_fs_revision_prop (svn_string_t **value_p, svn_fs_t *fs, svn_revnum_t rev, const char *propname, apr_pool_t *pool) |
Set *value_p to the value of the property named propname on revision rev in the filesystem fs. | |
svn_error_t * | svn_fs_revision_proplist (apr_hash_t **table_p, svn_fs_t *fs, svn_revnum_t rev, apr_pool_t *pool) |
Set *table_p to the entire property list of revision rev in filesystem fs, as an APR hash table allocated in pool. | |
svn_error_t * | svn_fs_change_rev_prop (svn_fs_t *fs, svn_revnum_t rev, const char *name, const svn_string_t *value, apr_pool_t *pool) |
Change a revision's property's value, or add/delete a property. | |
svn_error_t * | svn_fs_get_file_delta_stream (svn_txdelta_stream_t **stream_p, svn_fs_root_t *source_root, const char *source_path, svn_fs_root_t *target_root, const char *target_path, apr_pool_t *pool) |
Set *stream_p to a pointer to a delta stream that will turn the contents of the file source into the contents of the file target. | |
svn_error_t * | svn_fs_get_uuid (svn_fs_t *fs, const char **uuid, apr_pool_t *pool) |
Populate *uuid with the UUID associated with fs. | |
svn_error_t * | svn_fs_set_uuid (svn_fs_t *fs, const char *uuid, apr_pool_t *pool) |
If not NULL , associate *uuid with fs. | |
svn_error_t * | svn_fs_print_modules (svn_stringbuf_t *output, apr_pool_t *pool) |
Append a textual list of all available FS modules to the stringbuf output. |
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The type of a warning callback function. baton is the value specified in the call to svn_fs_set_warning_func(); the filesystem passes it through to the callback. err contains the warning message. The callback function should not clear the error that is passed to it; its caller should do that. |
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Write data directly to the file path in root. root must be the root of a transaction, not a revision. Set *contents_p to a stream ready to receive full textual data. When the caller closes this stream, the data replaces the previous contents of the file. The caller must write all file data and close the stream before making further changes to the transaction. If path does not exist in root, return an error. (You cannot use this routine to create new files; use svn_fs_make_file() to create an empty file first.)
result_checksum is the hex MD5 digest for the final fulltext written to the stream. It is ignored if NULL, but if not null, it must match the checksum of the result; if it does not, then the *contents_p call which detects the mismatch will return the error Do any necessary temporary allocation in pool. ### This is like svn_fs_apply_textdelta(), but takes the text straight. It is currently used only by the loader, see libsvn_repos/load.c. It should accept a checksum, of course, which would come from an (optional) header in the dump file. See http://subversion.tigris.org/issues/show_bug.cgi?id=1102 for more. |
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Apply a text delta to the file path in root. root must be the root of a transaction, not a revision. Set *contents_p to a function ready to receive text delta windows describing how to change the file's contents, relative to its current contents. Set *contents_baton_p to a baton to pass to *contents_p. If path does not exist in root, return an error. (You cannot use this routine to create new files; use svn_fs_make_file() to create an empty file first.)
base_checksum is the hex MD5 digest for the base text against which the delta is to be applied; it is ignored if NULL, and may be ignored even if not NULL. If it is not ignored, it must match the checksum of the base text against which svndiff data is being applied; if not, svn_fs_apply_textdelta() or the *contents_p call which detects the mismatch will return the error
result_checksum is the hex MD5 digest for the fulltext that results from this delta application. It is ignored if NULL, but if not NULL, it must match the checksum of the result; if it does not, then the *contents_p call which detects the mismatch will return the error The caller must send all delta windows including the terminating NULL window to *contents_p before making further changes to the transaction. Do temporary allocation in pool. |
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Change a node's property's value, or add/delete a property.
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Change a revision's property's value, or add/delete a property.
Note that revision properties are non-historied --- you can change them after the revision has been committed. They are not protected via transactions. Do any necessary temporary allocation in pool. |
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Set *kind_p to the type of node present at path under root.
If path does not exist under root, set *kind_p to |
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Set *root_p and *path_p to the revision root and path of the destination of the most recent copy event that caused path to exist where it does in root, or to NULL if no such copy exists. When non-NULL, allocate *root_p and *path_p in pool. *path_p might be a parent of path, rather than path itself. However, it will always be the deepest relevant path. That is, if a copy occurs underneath another copy in the same txn, this function makes sure to set *path_p to the longest copy destination path that is still a parent of or equal to path.
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Check if the contents of two root/path combos have changed. Set *changed_p to 1 if the contents at path1 under root1 differ from those at path2 under root2, or set it to 0 if they are the same. Both paths must exist under their respective roots, and both roots must be in the same filesystem. |
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Discover a node's copy ancestry, if any. If the node at path in root was copied from some other node, set *rev_p and *path_p to the revision and path of the other node, allocating *path_p in pool.
Else if there is no copy ancestry for the node, set *rev_p to If an error is returned, the values of *rev_p and *path_p are undefined, but otherwise, if one of them is set as described above, you may assume the other is set correspondingly. root may be a revision root or a transaction root. Notes:
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Create a copy of from_path in from_root named to_path in to_root. If from_path in from_root is a directory, copy the tree it refers to recursively. The copy will remember its source; use svn_fs_copied_from() to access this information. to_root must be the root of a transaction; from_root must be the root of a revision. (Requiring from_root to be the root of a revision makes the implementation trivial: there is no detectable difference (modulo node revision ID's) between copying from and simply adding a reference to it. So the operation takes place in constant time. However, there's no reason not to extend this to mutable nodes --- it's just more code.) Further, to_root and from_root must represent the same filesystem.
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Create a new, empty Subversion filesystem, stored in the directory path, and return a pointer to it in *fs_p.
path must not currently exist, but its parent must exist. If fs_config is not
SVN_FS_CONFIG_FS_TYPE , that value determines the filesystem type for the new filesystem. Currently defined values are:SVN_FS_TYPE_BDB Berkeley-DB implementation SVN_FS_TYPE_FSFS Native-filesystem implementation
If fs_config is
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Delete the node named path in root. If the node being deleted is a directory, its contents will be deleted recursively. root must be the root of a transaction, not of a revision. Use pool for temporary allocation. This function may be more efficient than making the equivalent series of calls to svn_fs_delete(), because it takes advantage of the fact that, to delete an immutable subtree, shared with some committed revision, you need only remove the directory entry. The dumb algorithm would recurse into the subtree and end up cloning each non-empty directory it contains, only to delete it later.
If return
Attempting to remove the root dir also results in an error, |
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Delete the filesystem at path.
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Deltify predecessors of paths modified in revision in filesystem fs. Use pool for all allocations.
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Set *entries_p to a newly allocated APR hash table containing the entries of the directory at path in root.
The keys of the table are entry names, as byte strings, excluding the final NULL character; the table's values are pointers to |
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Set *contents to a readable generic stream that will yield the contents of the file path in root.
Allocate the stream in pool. You can only use *contents for as long as the underlying filesystem is open. If path is not a file, return If root is the root of a transaction, it is possible that the contents of the file path will change between calls to svn_fs_file_contents(). In that case, the result of reading from *contents is undefined. ###
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Set *length_p to the length of the file path in root, in bytes. Do any necessary temporary allocation in pool. |
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Put the MD5 checksum of file path into digest, which points to Use pool only for temporary allocations. If the filesystem does not have a prerecorded checksum for path, do not calculate a checksum dynamically, just put all 0's into digest. (By convention, the all-zero checksum is considered to match any checksum.) Notes: You might wonder, why do we only provide this interface for file contents, and not for properties or directories? The answer is that property lists and directory entry lists are essentially data structures, not text. We serialize them for transmission, but there is no guarantee that the consumer will parse them into the same form, or even the same order, as the producer. It's difficult to find a checksumming method that reaches the same result given such variation in input. (I suppose we could calculate an independent MD5 sum for each propname and value, and XOR them together; same with directory entry names. Maybe that's the solution?) Anyway, for now we punt. The most important data, and the only data that goes through svndiff processing, is file contents, so that's what we provide checksumming for. Internally, of course, the filesystem checksums everything, because it has access to the lowest level storage forms: strings behind representations. |
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Set *stream_p to a pointer to a delta stream that will turn the contents of the file source into the contents of the file target. If source_root is zero, use a file with zero length as the source. This function does not compare the two files' properties. Allocate *stream_p, and do any necessary temporary allocation, in pool. |
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Retrieve mergeinfo for multiple nodes.
*catalog is a catalog for paths. It will never be root is revision root to use when looking up paths. paths are the paths you are requesting information for. inherit indicates whether to retrieve explicit, explicit-or-inherited, or only inherited mergeinfo.
If include_descendants is TRUE, then additionally return the mergeinfo for any descendant of any element of paths which has the Do any necessary temporary allocation in pool.
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Populate *uuid with the UUID associated with fs. Allocate *uuid in pool. |
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Set *path and *revision to the path and revision, respectively, of the history object. Use pool for all allocations. |
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Set *prev_history_p to an opaque node history object which represents the previous (or "next oldest") interesting history location for the filesystem node represented by history, or
If cross_copies is
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Copy a possibly live Subversion filesystem from src_path to dest_path.
If clean is
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Callers should invoke this function to initialize global state in the FS library before creating FS objects. If this function is invoked, no FS objects may be created in another thread at the same time as this invocation, and the provided pool must last longer than any FS object created subsequently. If this function is not called, the FS library will make a best effort to bootstrap a mutex for protecting data common to FS objects; however, there is a small window of failure. Also, a small amount of data will be leaked if the Subversion FS library is dynamically unloaded, and using the bdb FS can potentially segfault or invoke other undefined behavior if this function is not called with an appropriate pool (such as the pool the module was loaded into) when loaded dynamically. If this function is called multiple times before the pool passed to the first call is destroyed or cleared, the later calls will have no effect.
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Set *is_dir to Do any necessary temporary allocation in pool. |
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Set *is_file to Do any necessary temporary allocation in pool. |
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Create a new directory named path in root. The new directory has no entries, and no properties. root must be the root of a transaction, not a revision. Do any necessary temporary allocation in pool. |
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Create a new file named path in root. The file's initial contents are the empty string, and it has no properties. root must be the root of a transaction, not a revision. Do any necessary temporary allocation in pool. |
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Merge changes between two nodes into a third node. Given nodes source and target, and a common ancestor ancestor, modify target to contain all the changes made between ancestor and source, as well as the changes made between ancestor and target. target_root must be the root of a transaction, not a revision. source, target, and ancestor are generally directories; this function recursively merges the directories' contents. If they are files, this function simply returns an error whenever source, target, and ancestor are all distinct node revisions.
If there are differences between ancestor and source that conflict with changes between ancestor and target, this function returns an If the merge is successful, target is left in the merged state, and the base root of target's txn is set to the root node of source. If an error is returned (whether for conflict or otherwise), target is left unaffected. If conflict_p is non-NULL, then: a conflict error sets *conflict_p to the name of the node in target which couldn't be merged, otherwise, success sets *conflict_p to NULL. Do any necessary temporary allocation in pool. |
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Set *created_path to the path at which path under root was created. Use pool for all allocations. Callers may use this function in conjunction with svn_fs_node_created_rev() to perform a reverse lookup of the mapping of (path, revision) -> node-id that svn_fs_node_id() performs. |
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Set *revision to the revision in which path under root was created.
Use pool for any temporary allocations. *revision will be set to |
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Set *history_p to an opaque node history object which represents path under root. root must be a revision root. Use pool for all allocations. |
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Get the id of a node. Set *id_p to the node revision ID of path in root, allocated in pool. If root is the root of a transaction, keep in mind that other changes to the transaction can change which node path refers to, and even whether the path exists at all. |
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Set *revision to the revision in which the line of history represented by path under root originated.
Use pool for any temporary allocations. If root is a transaction root, *revision will be set to
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Set *value_p to the value of the property named propname of path in root. If the node has no property by that name, set *value_p to zero. Allocate the result in pool. |
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Set *table_p to the entire property list of path in root, as an APR hash table allocated in pool.
The resulting table maps property names to pointers to |
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Open a Subversion filesystem located in the directory path, and return a pointer to it in *fs_p.
If fs_config is not
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Return the path to fs's repository, allocated in pool.
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Append a textual list of all available FS modules to the stringbuf output.
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Determine if the properties of two path/root combinations are different. Set *changed_p to 1 if the properties at path1 under root1 differ from those at path2 under root2, or set it to 0 if they are the same. Both paths must exist under their respective roots, and both roots must be in the same filesystem. |
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Perform any necessary non-catastrophic recovery on the Subversion filesystem located at path.
If cancel_func is not Do any necessary allocation within pool. For FSFS filesystems, recovery is currently limited to recreating the db/current file, and does not require exclusive access. For BDB filesystems, recovery requires exclusive access, and is described in detail below. After an unexpected server exit, due to a server crash or a system crash, a Subversion filesystem based on Berkeley DB needs to run recovery procedures to bring the database back into a consistent state and release any locks that were held by the deceased process. The recovery procedures require exclusive access to the database --- while they execute, no other process or thread may access the database. In a server with multiple worker processes, like Apache, if a worker process accessing the filesystem dies, you must stop the other worker processes, and run recovery. Then, the other worker processes can re-open the database and resume work. If the server exited cleanly, there is no need to run recovery, but there is no harm in it, either, and it take very little time. So it's a fine idea to run recovery when the server process starts, before it begins handling any requests.
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Like svn_fs_copy(), but doesn't record copy history, and preserves the PATH. You cannot use svn_fs_copied_from() later to find out where this copy came from. Use svn_fs_revision_link() in situations where you don't care about the copy history, and where to_path and from_path are the same, because it is cheaper than svn_fs_copy(). |
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Set *value_p to the value of the property named propname on revision rev in the filesystem fs. If rev has no property by that name, set *value_p to zero. Allocate the result in pool. |
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Set *table_p to the entire property list of revision rev in filesystem fs, as an APR hash table allocated in pool.
The table maps |
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If not
Otherwise (if uuid is |
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Provide a callback function, warning, that fs should use to report (non-fatal) errors. To print an error, the filesystem will call warning, passing it warning_baton and the error.
By default, this is set to a function that will crash the process. Dumping to |
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Return, in *fs_type, a string identifying the back-end type of the Subversion filesystem located in path. Allocate *fs_type in pool.
The string should be equal to one of the In general, the type should make no difference in the filesystem's semantics, but there are a few situations (such as backups) where it might matter.
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Upgrade the Subversion filesystem located in the directory path to the latest version supported by this library.
Return
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Set *youngest_p to the number of the youngest revision in filesystem fs. Use pool for all temporary allocation. The oldest revision in any filesystem is numbered zero. |